In modern industrial production, mold is an important technology used in shaping products (including metal products and nonmetal products) for all of the industries. Meanwhile, it is the 'magnifying glass of efficiency and profit' to the raw material and equipment, because the value of the final product made in the mold is often tens of, even hundreds of times as valuable as that of the mold itself. The mold industry is the basic industry of the national economy, and it is called 'the mother of industry'. Every aspect of human life such as clothes, food, housing, and transportation is closely connected with the mold industry. Therefore, the level of injection mold technology has been a significant symbol to measure a country's developing level of mechanical industry. And mold can be divided into two kinds of them: mold for metal products and nonmetal products. The metal products mold include cold-press mold, pressing mold, forging mold, press casting mold, precise casting mold, stamping tool, punch tool, and dust metallurgy mold, etc. These kinds of mold have extensive apply-cation in electrode-cranial products, automobiles, aviation instruments, and other metal products. The nonmetal products include plastic injection mold, ceramic mold, rubber mold, glass mold, food mold, and ornament mold. These kinds of molds have extensive apply cation in our lives, at this page we are talking about injection mold. this is the most papular modern technology which used in our life everywhere. An injection mold used to form a plastic product using the injection molding process . A standard injection mould is made of a stationary or injection side containing one or more cavities and a moving or ejection side. The resin, or raw material for injection moulding , is usually in pellet form and is melted by heat and shearing forces shortly before being injected into the mould. The channels through which the plastic flows toward the chamber will also solidify, forming an attached frame. This frame is composed of the sprue , which is the main channel from the reservoir of molten resin, parallel with the direction of the nozzle, and runners , which are perpendicular to the direction of the nozzle and are used to convey molten resin to the gate(s) , or point(s) of the gate and feeding the molten material into the mold cavity. The sprue and runner system can be cut off and recycled after molding. Some moulds are designed such that it is automatically stripped from the part through the action of the mould. For example, the submarine gate or banana gate, if using hot runner systems then there will be no runners. The quality of the injection molded part depends on the quality of the mould, the care taken during the moulding process, and upon details of the design of the part itself. It is essential that the molten resin is at just the right pressure and temperature so that it flows easily to all parts of the mold. The parts of the injection mold must also come together extremely precisely, otherwise small leakages of molten plastic can form, a phenomenon known as flash . When filling a new or unfamiliar mould for the first time, where shot size for that particular mould is unknown, a technician should reduce the nozzle pressure so that the mold fills, but does not flash. Then, using that now-known shot volume, pressure can be raised without fear of damaging the mould. Sometimes factors such as venting, temperature, and resin moisture content, can affect the formation of flash as well. [caption id="attachment_2012" align="alignright" width="300"] Injection Mold [/caption] Injection Mold Material Traditionally, molds have been very expensive to manufacture therefore they were usually only used in mass production where thousands of parts are being produced. Injection Molds are typically constructed from hardened steel or aluminum. The choice of material to build a mold is primarily one of economics. Steel molds generally cost more to construct, but their longer lifespan will offset the higher initial cost over a higher number of parts made in the mold before wearing out. Aluminum molds can cost substantially less, and when designed and machined with modern computerized equipment, can be economical for moulding hundreds or even tens of parts. Requirements for the injection mold ejection system An ejection system is needed to eject the molded part from the cavity at the end of the molding cycle. Ejector pins built into the moving half of the mold usually accomplish this function. The cavity is divided between the two mold halves in such a way that the natural shrinkage of the molding causes the part to stick to the moving half. When the mold opens, the ejector pins push the part out of the mold cavity. cooling system A cooling system is required for the mold. This consists of an external pump connected to passageways in the mold, through which water is circulated to remove heat from the hot plastic. Air must be evacuated from the mold cavity as the polymer rushes in. Much of the air passes through the small ejector pin clearances in the mold. In addition, narrow air vents are often machined into the parting surface; only about 0.03 mm (0.001 in.) deep and 12 to 25 mm (0.5 to 1.0 in.) wide, these channels permit air to escape to the outside but are too small for the viscous polymer melt to flow through. All of the information we referred from Wikipedia, but we sort out together for easy to read, if you want to know more, please go to injection mold Wikipedia.

Cold Runner Mold : Plastic Injection Molding, Simple Part Design, Limited Production Runs, Low Maintenance, Change Production Color, Low-Cost Mold 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: 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. [gallery columns="2" size="medium" ids="3815,3816"] 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 & dis advantages 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?

Hot Runner Mold Systems: DONGGUAN SINCERE TECH CO.LTD(SINCERE TECH) provides plastic injection mould solutions to industries of all types and sizes. For almost 20 years DST has designed, built, and worked on almost every type of mold existing in the plastic industry. We are experienced in building custom plastic molds for a variety of hot runner mold systems , from hot runner manufacturers like: Husky Synventive Kona DME Mold-Masters INCOE HOSCO Our state-of-the-art mold building facilities include High precision CNC machines, automatic CMM measurement machine, and Two heads of EDM Machines to create many types of custom molds, including complex specialty injection molds, insert molds, unscrewing molds, overmolding , gas-assisted injection molds, double injection molds (2k molding), etc. We can build molds for both cold runner systems and hot runner systems. Hot Runner Molding: Efficient High Production Each system offers advantages and disadvantages. Choosing the system to employ depends on the requirements of the part to be produced. A few of the considerations include: [caption id="attachment_3901" align="alignright" width="494"] Hot runner mold structure[/caption] Type of material to use - virgin or "regrind" Colour changes during the production run Single or multiple design production Part complexity Colour requirements Physical characteristics of the material The primary difference between the two systems is that the hot runner eliminates the excess material retained in the feed channels of a cold runner mold . This feature reduces the number of production steps required and saves in material and energy costs. Furthermore, mostly hot runners use 100% virgin resins; no reprocessed or "re-grind" material is added. This is an important feature for specific applications where regrinding can cause the material to yellow, or detracts from the material properties, such as clarity in light pipe or lens production, where long-lasting transparency is a specific requirement. [gallery columns="2" size="large" ids="3902,3900"] Hot runner molding systems normally inject melted material directly into the individual mold cavity . Hot runner is almost always u sed for large volume production of thermoplastic injection molded parts , or multiple part production using multi-cavity molds and stack-molding technology . Hot runner molds are two plate molds with a heated runner system inside one half of the mold. A hot runner system is divided into two parts: The manifold has channels that convey the plastic on a single plane, parallel to the parting line, to a point above the cavity The drops , situated perpendicular to the manifold, convey the plastic from the manifold to the part Hot-Runner Systems: The advantages and disadvantages Primary advantages of hot runner systems include: Shorter, faster cycle times - most of them have no runners to cool Smaller machines - reduced shot volume into runners Automated processing – runners do not need to be separated from the parts Gates at the best position for economical design Elimination of runners means Materials cost savings - no runner to regrind or reprocess Least expensive cost/piece Reduction of energy costs No runners to remove or regrind Reduces the possibility of contamination Lower injection pressures Lower clamping pressure Consistent heat within the cavity Shorter cooling time Shot size reduced Cleaner molding process Eliminates nozzle freeze There are, however, a few disadvantages to hot runner mold systems that need to be considered: Hot runner molds are more complex and expensive to build than cold runner molds Higher initial start-up costs than for cold runner systems Complex initial setup prior to running the mold Higher maintenance costs – more susceptible to: Breakdowns Leakage Heating element failure Wear caused by filled materials Risk of thermal damage to sensitive materials Elaborate temperature control required The colors change is more complex than the cold runner, sometime you will spend lots of time and cost to clean up the hot runner systems, especially for transparency and white color parts. Hot Runner Molds: Applications & Possibilities H ot-runner systems are almost always used when large runs have to be manufactured in highly automated production. Additionally, technological advances enable us to build molds with gates positioned to yield the best quality molded parts. Hot runner molds are sometimes connected to needle valve nozzles , which are activated with precise computer-controlled timing. This allows for a number of advanced processes, including: In-Mold Decoration – lamination with a colored film coating Multi-Cavity Molds – cavities with different geometries and/or volumes Parts that belong together produced in one mold Injection valve opening and closing can be adjusted to the conditions of each individual cavity Injection pressure and holding pressure may be adjusted independently of each other Controlled Volume Balancing – a weld line can be shifted into a non-critical area of the molded part Stack Molding – two or more mold bases in production simultaneously creating multiple parting lines

hot runner mold | plasticmold.net

Blog about hot runner mold, looking for hot runner mold? We offer the best quality hot runner mold, hot runner molding and cold runner mold

18 01, 2020

Injection Molding And Defects

We are a China plastic injection molding/mold company to provide the Custom plastic injection mould and injection molding manufacturing services for Variety plastic products over the world. We offer part design, mold design, mold making, massive production, painting, plating, silk-screen, printing and assembly, all in one-stop services.

Do you know the name of the process by which most plastic solid materials are produced? It is called Injection molding. It is one of the best molding processes to make millions of injection molding parts in a very short time. However, The initial injection mold tooling cost is pretty high than other machining methods, but this injection tooling cost will be recovered by the large production later, […]

12 07, 2019

Plastic Mold and Mold Maintenance

By admin|2019-07-16T22:49:35+08:00July 12th, 2019|Categories: China mold, mold gate, molds, plastic injection mold, plastic moldmaker, two shot mold, Two shot molds|Tags: edge gate mould, hot runner mold, mould texturing, pin gate mould, plastic injection mold, plastic mold Maintenance, plastic mold repair, three-plate mould, two-plate mould|Comments Off on Plastic Mold and Mold Maintenance

Mould, indispensable in modern industry development and technological level improvement, is one kind of widely-used process equipment during mid-period of industrial production. According to statistics, moulding accounts for 75% of rough machining of industrial parts and 50% of precision machining. Mould can be classified as cold-punching mold, injection mold (or plastic injection mold), die casting mold, rubber mold and so on.

1. Introduction of Injection Mould

1.1 Range of Application:

Injection mould is suitable for thermoplastic like ABS, PP, PC, POM, etc. while rubber mould is fit for thermosetting plastic, such as phenolic plastic, epoxy plastic and so on.

1.1.1 Classification of Injection Mould:

By structure: two-plate mould, three-plate mould

By […]

29 06, 2019

How To Save Injection Molding Cost By Multiple Cavity Mold

By admin|2019-09-02T10:02:02+08:00June 29th, 2019|Categories: 2k injection molding, cold runner mold, cold runner molding, hot runner mold, hot runner molding, Injection Molding Cost, Injection moulding cost, molds, multi-cavity mold, multiple cavity mold|Tags: cold runner mold, hot runner mold, Injection Molding Cost, multi-cavity mold, multiple cavity mold, multiple cavity mould, overmolding, plastic injection molded parts, plastic mold cost|Comments Off on How To Save Injection Molding Cost By Multiple Cavity Mold

When we have a project that needs plastic injection molded parts, the first thing we need to do is finding a plastic mold company to make mold & molded parts, but before start this we need to check injection molding cost and mold cost in advance for investment budget, below are some suggestions to save cost for you, there have both advantages and disadvantages, by reading this you could choose the one base on your project requirement.

Use multiple cavity mold to save injection molding cost.

What is multiple cavity mold

Multiple cavity mold means the number of cavities greater than one, which means that has more than one part in an injection mold, It is […]

19 04, 2019

Plastic Injection Molding Service

By admin|2020-02-10T20:04:35+08:00April 19th, 2019|Categories: 2-Shot Injection Molding, 2k molding, China mold, custom injection molding, Custom Injection Moulding, Gas assist moulding, hot runner mold, hot runner molding, hot runner moulding, Injection Mold China, Injection Mold Maker, over molding, overmolding, plastic injection mold, Plastic Injection Moulding, Plastic Injection Moulding Machine, plastic mold, Plastic mold china, plastic mold company, plastic molding, plastic molding china, plastic molds, plastic mould, two shot mold, Two shot molds, two-shot injection molding, Two-Shot molding|Tags: 2 color molding, 2K molding, custom injection molding, hot runner mold, hot runner molding, Injection Mold China, Injection Molded Plastic Parts, injection molding, injection mould, plastic mold, plastic mold china, plastic mold company, plastic molds, two shot molding|0 Comments

The excellent quality of our plastic molds and molded parts, coupled with our experience and the performance of our services give us today a high international recognition. Indeed, the company is specialized in International Business and has customers all over the world. SINCERE TECH has very high standards of quality control and always runs long tests to make sure that our Plastic Injection Molding Service reaches all the expectations of our customers. We believe that the quality of a company and its products are seen through time and this is why we like to build strong long-term partnerships with our customer

Plastic Mold / Tool Manufacturing

We […]

31 03, 2019

Injection Mold
Gallery
Injection Mold

cold runner mold, cold runner molding, hot runner mold, hot runner molding, hot runner moulding, Injection Mold China, injection molding, injection molding process, injection mould, molds, three plate mold, two plate mold

Injection Mold

By admin|2020-01-07T22:34:17+08:00March 31st, 2019|Categories: cold runner mold, cold runner molding, hot runner mold, hot runner molding, hot runner moulding, Injection Mold China, injection molding, injection molding process, injection mould, molds, three plate mold, two plate mold|Tags: cold runner mold, hot runner mold, injection mold, injection molding, injection molding process, injection mould, injection moulding, Submarine gate, three plate mold, two plate mold|0 Comments

In modern industrial production, mold is an important technology used in shaping products (including metal products and nonmetal products) for all of the industries. Meanwhile, it is the ‘magnifying glass of efficiency and profit’ to the raw material and equipment, because the value of the final product made in the mold is often tens of, even hundreds of times as valuable as that of the mold itself.

The mold industry is the basic industry of the national economy, and it is called ‘the mother of industry’. Every aspect of human life such as clothes, food, housing, and transportation is closely connected with the mold industry. Therefore, the level of injection mold technology has been a significant […]

25 03, 2019

Insulated Runner Mold

By admin|2020-01-01T15:35:43+08:00March 25th, 2019|Categories: China mold, cold runner mold, cold runner molding, hot runner mold, hot runner molding, Insulated Runner Mold, Plastic Mold Manufacturing Company, plastic molds, plastic mould|Tags: cold runner mold, cold runner systems, Hoe runner systems, hot runner mold, Insulated Runner Mold, mold manufacturer china|0 Comments

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 […]

22 03, 2019

Cold Runner Molding

By admin|2020-01-01T15:37:16+08:00March 22nd, 2019|Categories: cold runner mold, cold runner molding, hot runner mold, hot runner molding, hot runner moulding, molds, plastic molding service, plastic moldmaker, plastic molds, plastic mould|Tags: cold runner mold, cold runner molding, cold runner mould, hot runner mold, hot runner molding, plastic injection molding|1 Comment

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

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 […]

18 03, 2019

Hot Runner Molding

By admin|2020-01-01T15:55:07+08:00March 18th, 2019|Categories: cold runner mold, hot runner mold, hot runner molding, hot runner moulding, molds, plastic mold|Tags: cold runner mold, hot runner mold, hot runner molding, hot runner moulding, plastic injection molding|1 Comment

Hot Runner Mold Systems:

DONGGUAN SINCERE TECH CO.LTD(SINCERE TECH) provides plastic injection mould solutions to industries of all types and sizes. For almost 20 years DST has designed, built, and worked on almost every type of mold existing in the plastic industry.

We are experienced in building custom plastic molds for a variety of hot runner mold systems, from hot runner manufacturers like:

Husky
Synventive
Kona
DME

Mold-Masters
INCOE
HOSCO

Our state-of-the-art mold building facilities include High precision CNC machines, automatic CMM measurement machine, and Two heads of EDM Machines to create many types of custom molds, including complex specialty injection molds, insert molds, unscrewing molds, overmolding, gas-assisted injection molds, double injection molds […]