Plastic Injection molding is what people call the process of filling a plastic mold with liquid plastic and waiting for it to take shape. An injection mold maker is the machine that makes the mold for injection molding. An injection mold maker makes molds from metals, usually steel or aluminum. The process calls for precision because a mistake means a repeat of the process or the part made will not be ale to function well enough and may be substandard.

The process of plastic injection molding relies solely on the accuracy of the injection mold. If the plastic injection mold maker makes a mistake in making the necessary molds needed to produce plastic product, the over all effect will be defective. The mold maker must have the precise measurements of the mold it will make in order to fully meet the standards of the manufacturer and client.

Materials Used in the Process of Plastic Injection Molding:

The usual materials used by plastic injection molding are plastic materials like polystyrene, acrylonitrile butadiene styrene, nylon, polypropylene, polyethylene and PVC. These are the liquid plastics that are usually used by injection molds to produce the plastics that they will then sell. The polystyrene material is lower in cost and in material grade. ABS is a plastic that is hardier than the previous one but not flexible. Nylon can resist mot chemical and is more flexible the previous two. Polypropylene is the plastic usually used to manufacture containers because they are tough and flexible. Plastic Injection molding is also utilized for metal works.

Plastic Mold

Plastic Mold

A Plastic injection mold maker will have to make more molds if the molds are used for metal molding. Metal molding wears out the molds more than plastic molding because the melting temperature of metals is higher than plastics. Despite this additional cost, manufacturers still utilize injection molds for metal molding because the prices of metals that are molded this way are still profitable.

Uses of Plastic Injection Mold:

Plastic Injection molding is a manufacturing technique that is used for making parts from thermoplastic materials in production. After a product is designed by an industrial designer or engineer, the models are then made by a mold maker or toolmaker from metal, usually steel or aluminum.

Plastic Injection Mold is a method of molding in which the molding material is first placed in an open, heated mold cavity. The mold is then closed with a strong top force or plug member, and pressure is put on to force the material into contact with all of the mold areas, and then proper heat and pressure are maintained until the molding material has completely cured.

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Flexible Gating Advantages, Dependable Reproduction, Economical Process, Easy to Maintain, Fast Molding Cycle, Decreased Tool Wear

SINCERE TECH is mold manufacturer china company that provides plastic mold making and plastic injection molding solutions to industries of the world, started since 2005 we specially make plastic molds for the customer, after 2016 we have bought a plastic injection molding company to mold the molded part for our world customers.

Our advanced manufacturing facilities include a wide range of thermoplastic injection molding solutions for many types of plastic parts, including processes for Hot Runner mold Systems and Cold Runner mold Systems.

Insulated Runner Molds: Hot Runner System With A Twist

Insulated runner systems are inexpensive alternatives to traditional hot runners, where the mold is not heated, but the runner channels are extremely thick and stay molten during continuous cycling.

This feature provides the flexible gating advantages of hot runner switch out the added cost of the manifold and drops of a heated hot runner system.

Properly designed insulated runners, with thermally controlled gate, offer several advantages over hot runner mold systems, including:

  • Dependable reproduction – no “dead spots” in mold
  • Uniform temperature distribution – thermal insulation forms through melt deposited at the wall
  • Economical process for continuous operation of uniform cycles without extended interruptions
  • Easy to maintain – quick to clean
  • Fast production color changes
  • Molds are less expensive to build and to maintain than hot runners
  • Minimal heat loss – thermal equilibrium reached quickly
  • Low energy input on startup – reduces energy cost
  • More consistent volume of polymer per part
  • Faster molding cycles
  • Elimination of runner scrap — less regrind

    Mold manufacturer China

    Mold manufacturer China

  • Improved part finish
  • Decreased tool wear

However, as with hot runners, the insulated runner system also has disadvantages when compared to cold runner systems. The increased level of technology required to manufacture and operate the mold results in:

  • More complicated mold design
  • Higher mold costs
  • More difficult start-up procedures
  • Possible thermal degradation of the polymer melt
  • More difficult color changes than with cold runners

For a quote or more information about how we can help your project, please call us or send us an email, we will quote you in 24 hours.

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Molding Flash or burrs

Cold Runner Mold: Plastic Injection Molding, Simple Part Design, Limited Production Runs, Low Maintenance, Change Production Color, Low-Cost Mold

What is cold runner mold

A cold runner mold is a type of injection molding tool where the plastic material is cooled in a separate channel or “runner” before it reaches the individual cavities of the mold. The plastic resin is injected into the cold runner system, where it solidifies before being directed into the cavities to form the final parts. The term “cold” refers to the fact that the runner system is not heated, unlike a “hot runner” mold. Cold runner molds are often used for producing large numbers of small, simple parts and are relatively low-cost to produce.

SINCERE TECH (plasticmold.net) provides plastic injection mold solutions to industries of all types and sizes.

Our state-of-the-art mold building facilities include high-speed CNC Milling and mirror EDM Machining for many types of complex specialty injection molds, including insert molds, gas-assist injection molding, 2K mold, multiple cavities mold and unscrewing molds. We can build molds from small to big (25 ton) for both hot runner mold systems and cold runner mold systems.

Cold Runner Molds: Efficient and Economical

Each system has it’s advantages and disadvantages. Choosing the correct system depends on the requirements of the part to be produced. A few of the considerations include:Cold runner mold

  • Part complexity
  • Color requirements
  • Physical characteristics of the material
  • Type of material – virgin or “regrind”
  • Color changes during the production run

Cold runner systems are best used:

  • When the parts produced are of simple design,
  • For limited production runs, or
  • When a rapid change in production colour is needed

In a cold runner mold, the runner (excess material retained in the feed channels) is cooled and ejected with the part. Every cycle, apart, and a runner is produced.

There are two major types of cold runner molds:

  • A two-plate cold runner mold is the easiest and least expensive type of mold to produce. Two plate molds have a single parting plane, and the mold splits into two halves at the plane. Because the runner system must be in line with the parting plane, the part can only be gated on its perimeter.
  • A three-plate cold runner mold differs from a two plate in that it has two parting planes, and the mold splits into three sections every time the part is ejected. This feature provides greater flexibility of design, allowing gating to be placed in the most efficient locations. Since the mold has two parting planes, the runner system can be located on one, and the part on the other, for easier separation.

Cold Runner Mold Systems: The advantages & disadvantages

There are many significant advantages to using a cold runner mold system:

  • Simple, lower-cost mold design and construction
  • Considerably less expensive than a hot runner system
  • Moulds require less maintenance
  • Easier to set up and operate
  • Colour changes are easy – all plastic in the mould is ejected with each cycle

While it is a less expensive process that hot runner systems, there are a few disadvantages to cold runner systems that need to be considered, including:

  • Waste plastic generated
  • Runner material must be either disposed of or
    reground and reprocessed
  • Additional steps in the manufacturing process
  • Regrind will increase variations in the injection 
    molding process
  • Regrinding could decrease the plastic’s strength characteristics and mechanical properties

Is your project ready for molding parts yet? Welcome to send us your requirement for quotation, we will provide you with the best solution base on your part design?

Injection Molding Process:Plastic Processing, Make Parts From Plastic Material

Finding the right source for your injection molded thermoplastic parts is as easy as selecting DONGGUAN SINCERE TECH CO.LTD. With SINERE TECH, you are guaranteed professional quality assurance standards, the latest in technological equipment, and innovative, cost-efficient manufacturing techniques.

Injection Molding Process: A Brief Description

Thermoplastic injection molding is the most widely used of all plastic processing methods. Injection molding is a manufacturing technique for making parts from plastic material. Molten plastic is injected at high pressure into a mold, which is the inverse of the desired shape.

Thermoplastics are those which, once formed, can be heated and reformed over and over again.

PP injection molding

PP injection molding

The mold is made from metal, usually either steel or aluminum, and precision-machined to form the features of the desired part. SINCERE TECH provides the highest quality economical plastic molds available today, with less moving parts to reduce maintenance and repair costs.

The injection molding machine reduces pelletized resins and coloring agents into a hot liquid. This slurry, or “melt”, is forced into a cooled mold under tremendous pressure. After the material solidifies, the mold is unclamped and a finished part is ejected.

An injection-molding machine performs the entire process of plastic molding.  These machines serve to both heat the plastic material and form it.  Using different molds the shape of the produced components may be changed.

Injection molding machines have two basic parts, the injection unit, which melts the plastic and then injects or moves it into the mold, and the clamping unit, which holds the mold shut during filling. The unit clamps the mold in a closed position during injection, opens the mold after cooling, and ejects the finished part.

You can go to our home page by https://www.plasticmold.net/ to know more information about injection molding service and injection molding process

Injection Molded Plastic Parts: High-Quality Parts, Guaranteed to Specification, Extended Warranty, Retain Mold Integrity, Advanced Design, Quality Assurance

Finding the right source for your injection molded plastic parts is as easy as selecting https://www.plasticmold.net/. Our modern molding facility is located in Changping Town, Dongguan, China, an efficient plastic mold & molding company service custom injection mold and plastic molded parts to the world.

With SINCERE TECH, you are guaranteed professional quality assurance standards, the latest in technological equipment, and innovative, cost-efficient manufacturing techniques.

Injection Molded Plastic Parts: SINCERE TECCH’s Advantage

The injection molding process offers the lowest piece prices available, but tooling (plastic mold making) prices are generally the highest.  That is why we need to make all of the molds in-house to create top quality plastic mold and the lowest price for our customers.

SINCERETECH’s advanced design and engineering techniques produce the highest quality plastic injection molds available today.

And they stand behind their word. They offer their customers the option of joining their Extended Warranty Program guaranteeing the plastic mold we design and builds for you will retain its integrity throughout a specific number of cycles.

injection molded plastic parts

injection molded plastic parts

For more information, see the home page.

Injection Molded Plastic Parts: Applications

Injection molding is widely used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. It is the most common method of production, with some commonly made items including bottle caps and outdoor furniture.

We have the ability to produce a wide variety of injection molded plastic parts and components, for industries of all types, including:

  • Connectors
  • Wire Shields
  • Vials
  • Cases
  • Switches
  • Housings
  • Face Plates
  • Toys
  • Bezels
  • Push Buttons
  • Knobs
  • Light Pipes
  • Shields
  • Computer Peripherals
  • Phone Parts
  • Gears
  • Typewriter Parts
  • Window Lift Parts
  • Fuse Blocks
  • Wedges
  • Trim Plates
  • DVD Brackets
  • Faucet Extrusions
  • A / C Vents
  • Gear Shift Knobs
  • Tail Lamp Sockets
  • Blood Testers
  • Boat Parts
  • Name Plates
  • Buckles
  • Bottle Ties
  • Component Boxes
  • Spools
  • Bobbins
  • Seat Belt Parts
  • Spacers
  • Lenses
  • Vents
  • Clips
  • Flower Pot Bases
  • Actuators
  • Radiator Tops
  • Junction
  • Boxes
  • Motor Housings
  • Key Fobs
  • Cosmetic Packaging

To provide the best process for your project, you are welcome to send us email, we will offer you the best solution for your project.

Plastic Injection molding is the principal method of forming thermoplastic materials. Modifications of the plastic injection molding process are sometimes used for thermosetting plastics.

In Plastic injection molding, plastic material is put into a hopper which feeds into a heated injection unit. A reciprocating screw pushes the plastic through this long heating chamber, where the material is softened to a fluid state. At the end of this chamber there is a nozzle which abuts firmly against an opening into a cool, closed mold. The fluid plastic is forced at high pressure through this nozzle into the cold plastic mold. A system of clamps hold the mold halves shut. As soon as the plastic cools to a solid state, the mold opens and the finished plastic is ejected from the press.

The problem with plastic injection molding of thermosetting materials is that, under heat, these plastics will first soften, then harden to an infusible state. Thus it is essential that no softened thermosetting material in the heating chamber be allowed to remain there long enough to set. Jet molding, offset molding and molding using a screw-type machine overcome this problem by liquefying the thermosetting plastic material just as it goes through the injection nozzle into the plastic mold, but not before.

Blow Molding
Blow molding is a method of forming hollow articles out of thermoplastic materials.

plastic molding company

plastic molding company, injection molding machines from 60 Ton to 2000 Ton

Blow molding is a process of forming a molten tube of thermoplastic material, then with the use of compressed air, blowing up the tube to conform to the interior of a chilled blow mold. The most common methods are extrusion, injection, and injection-stretch blow molding.

The continuous-extrusion method uses a continuously running extruder with a tuned die head that forms the molten plastic tube. The tube is then pinched between two mold halves. A blow pin or needle is inserted into the tube and compressed air is used to blow up the part to conform to the chilled mold interior. Accumulator-extrusion is similar, however, the molten plastic material is accumulated in a chamber prior to being forced through a die to form the tube.

Injection blow molding is a process of injection molding a preform (similar to a test tube), then taking the tempered preform to a blow mold to be filled with compressed air to conform to the interior of the blow mold. Injection-stretch blow molding can be a single-stage process similar to standard injection blow molding, by adding the element of stretch prior to blow forming. Also, a two-step process is possible, where a preform is made in an injection molding machine, then taken to a reheat-stretch blow molding machine for preform reheating and final blow forming in a blow mold.

Thermoforming
Thermoforming of plastic sheet has developed rapidly in recent years. This process consists of heating thermoplastic sheet to a formable plastic state and then applying air and/or mechanical assists to shape it to the contours of a mold.

Air pressure may range from almost zero to several hundred psi. Up to approximately 14 psi (atmospheric pressure), the pressure is obtained by evacuating the space between the sheet and the mold in order to utilize this atmospheric pressure. This range, known as vacuum forming, will give satisfactory reproduction of the mold configuration in the majority of forming applications.

Themoset Transfer Molding

Themoset Transfer molding is most generally used for thermosetting plastics. This method is like compression molding in that the plastic is cured into an infusible state in a mold under heat and pressure. It differs from compression molding in that the plastic is heated to a point of plasticity before it reaches the mold and is forced into a closed mold by means of a hydraulically operated plunger.

Themoset Transfer molding was developed to facilitate the molding of intricate products with small deep holes or numerous metal inserts. The dry mold compound used in compression molding sometimes disturbs the position of the metal inserts and the pins which form the holes. The liquefied plastic material in transfer molding flows around these metal parts without causing them to shift position.

Reaction Injection Molding

Reaction injection molding (RIM) is a relatively new processing technique that has rapidly taken its place alongside more traditional methods. Unlike liquid casting, the two liquid components, polyols and isocyanates, are mixed in a chamber at relatively low temperatures (75° – 140° F) before being injected into a closed mold. An exothermic reaction occurs, and consequently RIM requires far less energy usage than any other injection molding system.

The three major types of polyurethane RIM systems are rigid structural foam, low-modulus elastomers, and high-modulus elastomers.

Reinforced RIM (R-RIM) consists of the addition of such materials as chopped or milled glass fiber to the polyurethane to enhance stiffness and to increase modulus, thus expanding the range of applications.

Compression Molding

Compression molding is the most common method of forming thermosetting materials. It is not generally used for thermoplastics.

Compression molding is simply the squeezing of a material into a desired shape by application of heat and pressure to the material in a mold.

Plastic molding powder, mixed with such materials or fillers as woodflour and cellulose to strengthen or give other added qualities to the finished product, is put directly into the open mold cavity. The mold is then closed, pressing down on the plastic and causing it to flow throughout the mold. It is while the heated mold is closed that the thermosetting material undergoes a chemical change which permanently hardens it into the shape of the mold. The three compression molding factors — pressure, temperature and time the mold is closed — vary with the design of the finished article and the material being molded.

Extrusion

Extrusion molding is the method employed to form thermoplastic materials into continuous sheeting, film, tubes, rods, profile shapes, and filaments, and to coat wire, cable and cord.

In extrusion, dry plastic material is first loaded into a hopper, then fed into a long heating chamber through which it is moved by the action of a continuously revolving screw. At the end of the heating chamber the molten plastic is forced out through a small opening or die with the shape desired in the finished product. As the plastic extrusion comes from the die, it is fed onto a conveyor belt where it is cooled, most frequently by blowers or by immersion in water.

In the case of wire and cable coating, the thermoplastic is extruded around a continuing length of wire or cable which, like the plastic, passes through the extruder die. The coated wire is wound on drums after cooling.

In the production of wide film or sheeting, the plastic is extruded in the form of a tube. This tube may be split as it comes from the die and then stretched and thinned to the dimensions desired in the finished film.

In a different process, the extruded tubing is inflated as it comes from the die, the degree of inflation of the tubing regulating the thickness of the final film.

Need to know more information about Plastic injection molding to support your market? Welcome to contact our team by call or email.

SINCERE TECH is  Injection Molding China Company offers injection moulding service to various countries in the world with the best quality and excellent injection moldings services. The company ST which is known to be the leader of the mold manufacturer, with all its dedication, developed and produced varieties of the injection molding parts. The optimal service, leading equipment, and advanced technology are valuable reasons for the success of the company. ST Injection Molding Service Company optimize the design based on the requirements of the customer and they are very attentive while designing the mold as they can save their money, reduces the processing and mould repairing time for their customers.

The plastic mold designing team of the company has 15 experts in making fully complete mold design, four engineers who inspect the mold design and two technical managers to verify the mold structure before mold manufacturing. This team possesses the ability to operate UG and PRO-E software with all their efforts. The engineers of the company have the specialization of the product so that they can provide their customers with worth able suggestions and technical supports. The design engineers of ST  injection mold China and Injection Molding China Company offer DFM( design for manufacturability)  in two business days and within five days they supply fully mold design to the customers.

Mold developments with perfect design, the top processing technologies with constant works are their key to success. The superior emphasis on design, sophisticated working devices, and ideal processing system provide their clients with more satisfaction. ST Injection Mold China Company has launched 3 automatic production outline in the surface treatment and workshop that is dustproof which is used in surface texture, surface spray, IMD, etc. ST Injection Mold Company provides its customers with injection mold making and injection molding services at low cost which could not be provided by their competitors. If you are looking for injection mold or injection molding china partner to support your business, then you could contact with our team, we will reply to you with two business days.

ST, An injection Mold China Company supplies many kinds of injection molds, injection molding parts, plastic materials and several plastic molding technologies based on the requirements of the customers. The R&D department takes the responsibility of analyzing and designing the plastic parts according to the needs of the clients. The project department of the company will perform the foreseen inspection of plastic parts moldings structure, process, and related parts situation. The analysis is also done by the professionals whether the moldings are manufactured according to the design.

The production of the plastic molds is completed by the Professional MOLD FLOW Software, temperature control, gate assignment, cooling time and analyze injection process which would enhance the mould design. The project manager is responsible for the outline process, precision machining, rough machining, machine process, assembly inspection, colliding and assembly and molding test. Molding test is performed to check the dimension of the injection molding parts whether it matches with the mating parts. The QC department of the company will inspect the plastic parts mould on product size, injection process, appearance, and physical performance.

ST Plastic Mold Company has different inspection tool and inspection standard for different products. The company will make many testing the product withstanding pressure, tensile strength, impulse loading, and impact resistance. The company has as an abundant experience which is applied in the production of plastic part moldings so that the customers will be provided with the products of a superior standard. The plastic parts are subjected to various surface treatments to make the plastic molded parts having an excellent shape which is related to the customers’ need.  According to the order documents, the company will perform a strict inspection before the shipping of the products. If you want to know more information regarding the injection molding parts or if you have any project that needs an injection mold china company to support with injection mold making and injection molding parts production, welcome to send us your RFQ, we will quote you in two working days.

Creating properly parts design and built plastic injection tooling is the most important part of any injection molded parts development. In order to build a successful high-quality plastic injection mold tooling, a comprehensive plan must be followed.

Plastic Injection Tooling Design – If a plastic tooling is designed incorrectly, the penalty may be paid in part quality, injection molding tool repair costs, or longer cycle time (higher component cost) for the entire length of production needs. Because of this we focus on injection tooling design with production in mind and specify parameters up front so that design specification errors or omissions never enter into the quality/cost equation.Plastic Injection Tooling

Moldflow Analysis – we do Moldflow filling analysis during plastic injection tooling design & development to assure proper plastic flow through the tool and answer questions such as sprue size, runner size, gate size, gate position, number of gates, plastic shear level, tonnage required, weld line locations, potential air traps (potential burn marks), sink marks issue, filling time, and a host of other important issues must be analyzed before any steel is cut. This analysis is completed in the tool design phase to eliminate costly tool or part design problems that might otherwise go unnoticed until it is too late.

Plastic injection mold Tooling Cost – There is a wide range of parts from the very simple to the very complex with a range low to very high production volume requirements. Likewise, there are many levels of plastic tooling manufacturing companies with varying levels of overhead and capability. If a mold tool is built by a plastic tooling company with a capability level or overhead level that is above what is needed, plastic tooling cost can exceed the level that would allow a project to go forward. Likewise, if the plastic tooling company does not have capabilities needed for a complex mold, quality, price, or delivery time could suffer. This is why plastic tooling complexity must be matched with toolmaker size and capability.

We are a professional plastic tooling company in China, we make injection molding tools from small to big up to 30 tonnages, we have full plastic tooling manufacturing equipment to do all of mold manufacturing jobs in-house, this will be easy to control the lead time and quaintly of plastic injection tooling, plastic tooling we make are export to Canada, Germany, American and more country in America and Europe, The tooling components for plastic tooling can be matched correctly base on customers requirement, for Europe export plastic tooling we use HASCO tooling components, for American customers we use DME tooling components, so customers can replace any tooling components easy and fast.

Plastic Injection Tooling Warranty – We appreciate our customer’s investment and we stand by our plastic tooling. Any injection moulding tooling developed through our mold factory will have lifetime shots guarantee, plastic toolings made by our factory normally have 3 types of shots guarantee.

1. Minimum of one million lifetime shots guarantee. For this type of plastic injection tooling, we use hardened steel for cavity and core, like S136,1.2344, H13, 1.2083, 1.2343, etc, the hardness of steel is HRC 48-52,

2. Minimum of a half million-lifetime shots. For this type of plastic injection mold tooling, we use pre-hardened steel material, such as 1.2738H, P20, 1.2738HH, etc, the hardness for this injection mold tooling is HRC 33-38.

For export injection moulding tool, all of the cavity/core steel is bought from LKM (the biggest mold steel company in China), or buying the steel in Europe brand according to customer requirement.Plastic Tooling Company

3. The above two types of plastic injection tooling are for export tooling, this one is for the none export injection moulding tool, which means we will produce the plastic molded parts for the customer and ship the plastic parts to our customers, the mold tooling lifetime for this type of tooling will be no limited (as many as customer wants), the reason because we have the plastic tooling in-house, if any issue happened we can fix the tooling for our customer with no extra cost, moreover, if customer want us to produce the injection molding parts for them, the plastic tooling cost will be very lower, because we will never earn any profits on the injection moulding tool manufacturing, or even we can bear come plastic tooling cost, this is depending on the number of parts customer requirement, this is the best options for you to increase your market by minimum investment.

This is not the end if you choose the number three option, when you have finished number of parts production, we can return all of the injection moulding tool prices back to you, you can use this price to order plastic injection molded parts directly, of course, this is depending on the quantity of the parts you have been produced. If you want to know more about this solution? You are welcome to contact us or send your requirement for quotation, you will have our professional team to support, we offer you the best price and solution for your project, and we never share your data to any others.

What are you waiting for? Call us or send us an email.

Plastic Mold Cost

How Much Does Injection Molding Cost?

Plastic Injection Molding Cost

Plastic Injection Molding Cost

If you are looking for the plastic molding parts for your new project, I believe the most important thing you want to know what will be the cost for the plastic mold and injection molding parts. Because all of this cost will affect your project going smoothly and success or failure. To carefully check this before you are running a new project if the project fails you will lose lots of money and time.

Let me give you some idea to help you understand plastic mold and plastic injection molding cost, this will save your time for your new development products.

The other easy way to understand those costs for your new project will be sending us your 3D part design or sample pictures, and tell us your requirements, like material for each part? Estimate the number of parts per time? Any special surface requirement to the visible side?

We will send you the best competitive price, we could offer the lowest mold cost $550, molding part cost $0.1, you could have this as a reference for your product and market research, welcome to contact us by [email protected]

Plastic Injection Molding Cost Guiding Tips

There are meanly four parts of cost: Plastic Material Cost, Molding Production Cost, Plastic Mold Cost, Part Color Cost, let us explain those four mean costs one by one.

Plastic Material Cost

First, the plastic material cost is determined by the weight of material that is required and the unit price of that material. The weight of the material is a result of the part volume and material density; however, the part’s maximum wall thickness can also play a role. The weight of material that is required includes the material that fills the channels of the mold. The size of those channels, and hence the amount of material, is largely determined by the thickness of the part, the selection of the material affects the unit part price as well, a different type of plastic material has a different price, for example, PP material is a totally different price than ABS material, so the material cost for plastic part includes two parts, one is the weight of the material, one is the type of material for the plastic part.

Second, the injection molding production cost is primarily calculated from the hourly rate and the cycle time. The hourly rate is proportional to the size of the injection moulding machine being used, so it is important to understand how the part design affects machine selection. Injection molding machines are typically referred to by the tonnage of the clamping force they provide. The required clamping force is determined by the projected area of the part and the pressure with which the material is injected. Therefore, a larger part will require a larger clamping force, and hence a more expensive machine. Also, certain materials that require high injection pressures may require higher tonnage machines. The size of the part must also comply with other machine specifications, such as clamp stroke, platen size, and shot capacity.

Injection Molding Production cost

The cycle time can be broken down into the injection time, cooling time, and resetting time. By reducing any of these times, the production cost will be lowered. The injection time can be decreased by reducing the maximum wall thickness of the part and the part volume. The cooling time is also decreased for lower wall thicknesses, as they require less time to cool all the way through. Several thermodynamic properties of the material also affect the cooling time. Lastly, the resetting time depends on the machine size and the part size. A larger plastic part will require larger motions from the machine to open, close, and eject the part, and a larger machine requires more time to perform these operations.

Plastic Mold Cost

Third, the plastic mold cost has two main components – the mold base and the machining of the cavities. The cost of the mold base is primarily controlled by the size of the part’s envelope. A larger plastic part requires a larger, more expensive mold base. The cost of machining the cavities is affected by nearly every aspect of the part’s geometry. The primary cost driver is the size of the cavity that must be machined, measured by the projected area of the cavity (equal to the projected area of the part and projected holes) and its depth. Any other elements that will require additional machining time will add to the cost, including the feature count, parting surface, side-cores, lifters, unscrewing devices, tolerance, and surface roughness.

The quantity of parts also impacts the plastic mold cost. A larger production quantity will require a higher class mold that will not wear as quickly. The stronger mold material results in a higher mold base cost and more machining time.

One final consideration is the number of side-action directions, which can indirectly affect the cost. The additional cost for side-cores is determined by how many are used. However, the number of directions can restrict the number of cavities that can be included in the mold. For example, the mold for a part that requires three side-action directions can only contain two cavities. There is no direct cost added, but it is possible that the use of more cavities could provide further savings.

Forth, the plastic molding color is also cost effection to the molded parts, normally does not have too much effect, but this is still depending on which parts color do you require if you need white color for your plastic parts, then the cost will be 10% more than another color, if you require clear color (transparent molding parts) molding parts, then the cost will be 25-40% high than normal color molded parts. When you need white color molding parts, then the molding shop needs to clean the barrel very well, and not allow any other color max in this injection unit and material, this will take time and waste some material, and the other thing is the waste rate will be increased, that is the reason the white color plastic parts is little high than other colors. When you are looking for transparent molding parts like PC injection molding, or PMMA, PS molding parts, the molding shop needs use special injection unit to produce this type of molding parts, they need to clear the unit barrel very well and use some good quality injection molding machine to produce the clear plastic molding parts, because any tiny molding defects on the transparent molding parts will be easy to identify, so you need to make the best quality molding parts, the waste rate is higher, and need to use the high tech injection molding machine, and all of those are more costly than normal molding production.

Injection molding Color Cost

Cost Estimating mothed for plastic injection mold and molding parts

1. Feature-based estimate

This feature-based cost estimator is for the plastic molding of production quantities (over 10,000 units), where more durable and costly tooling can be used due to its small impact on the per-part cost. The material cost is estimated from the part geometry and uses current material prices. For the production cost, a compatible injection molding machine is selected from a database of over 50 machines and the cycle time is estimated from the part geometry, material properties, and machine specifications. For the tooling cost, a suitable mold base is selected using standard mold dimensions and mold classes, and the required mold machining is estimated from the part geometry and other user specifications. These three costs (material, production, and tooling) are calculated for 4 different cavity arrangements (1, 2, 4, and 8 cavities) and the most cost-effective option is provided.

2. Low volume injection molding cost estimate

This feature-based cost estimator is for the injection molding of low volumes (under 10,000 units), where rapid tooling methods (high-speed machining of Class 104 molds) are used to create the mold due to the large impact on the per-part cost. The material cost is estimated from the part geometry and uses current material prices. For the production cost, a compatible injection molding machine is selected from a database of over 50 machines and the cycle time is estimated from the part geometry, material properties, and machine specifications. For the plastic tooling cost, a suitable mold base is selected using standard mold dimensions, and the required mold machining is estimated from the part geometry and other user specifications. These three costs (material, production, and tooling) are calculated for 4 different cavity arrangements (1, 2, 4, and 8 cavities) and the most cost-effective option is provided.

3. Standard estimate

This standard injection molding cost estimator does not require any part geometry but requires more process parameter inputs to calculate a more accurate estimate. The material cost is estimated from the part and runner volumes, an up-to-date material database with pricing, and customizable process parameters. For the production cost, the cycle time must be specified, as well as the machine rate and labor rates. After adding the mold cost, a detailed cost breakdown is provided for the material, production, and tooling costs.

4. Plastic mold cost estimate

This feature-based cost estimator calculates the mold cost for plastic molding. Based on the part geometry and mold requirements, such as the number of cavities, a suitable mold base is selected using standard mold dimensions. The required mold machining is estimated for the selected SPI mold class and rapid plastic tooling methods may be chosen for a Class 104 mold or so low volume products.

Hope all of that information could help you to get an idea about the cost idea for your project, are you ready to have your project start working on plastic injection molding, welcome to send us your requirement for quotation, we will quote you completely mold and molding price, you will have a complete plan for your project.

SINCERE TECH does not only offer custom plastic injection mold, but also offers custom plastic injection molding service. Custom Injection molding service is especially suitable for who only need products and doesn’t want to produce plastic molds by themselves. in this case, if we produce parts for our customer, we will save mold maing cost for our customers and make zero profits from mold making. Our plastic injection molding service can save the cost of an injection machine of our customer.

What is Custom plastic injection molding service

Plastic injection molding service offered by SINCERE TECH is for our customers who need us to produce plastic products for them. Many customers don’t have factories or equipment to produce products, so when they buy plastic injection molds from us and they also want us to produce products here. And they can directly import of product to his country instead of mold.

Choosing custom plastic injection molding service by SINCERE TECH, you can enjoy many benefits:

custom plastic injection molding service

custom plastic injection molding service

1. You can get a very good price from SINCERE TECH. we offer the best price for molding products at cost.
2. You save the cost and energy to find another plastic molding company to produce the product for you.
3. When your product output reaches a certain quantity, we will return you the cost of making molds
4. You can save the cost to buy any other equipment to produce products for you.
5. You can save the cost to employ an engineer to operate the machine.

6, we can share some mold making cost, this reduces your investment and enjoys the same quality products

What do you need to provide us when you are looking for our custom plastic injection molding service?

Samples, design or concept

If you have a design, we also have 2D /3D design department made up experienced engineers who will carefully study your design. If you want to modify the design, we have product design department who can help you modify the design.
If you have only samples, our design department can create a design for you.

What are features SINCERE TECH’s plastic injection molding service

Competitive price
Quick delivery
No requirement of the minimum quantity
Special product package can be customized
Mold cost can be returned when production reaches a certain quantity

Interested in our custom plastic injection molding service? Please contact us.