Bond Metal to Plastic, No Glues / Adhesives / Additional Heating, Reduced Energy Cost, Decreased Cooling Time, Reduce Part Defects

SINCERE TECH provides a variety of value-added services, including Plastic mold Manufacturing, plastic molding service, Ultrasonic Insertion, to help complete your project. Ultrasonic insertion is used to bond metal and plastic parts together without the need for glues, adhesives or additional heating or processes.

When a metal part needs to be attached to a plastic part,conventional insertion methods include:

  • Mold the metal component into part during production
  • Glue the metal part to the plastic
  • Heat
    • Melt the plastic component at insertion point
    • Insert metal piece into molten area
    • Allow part to cool and solidify

Ultrasonic Insertion: Benefits and Applications

This technology is an alternative to gluing or heating. Ultrasonic Insertion of metal to plastic offers distinct advantages over other bonding processes. Although this process is similar to locally melting the area with another heat source, it has the advantages of::

  • Heating a far smaller area to lower temperatures

  • Reducing energy costs
  • Decreasing cooling time
  • Reducing the possibility of defects due to thermal effects

Ultrasonic insertion works by using the ultrasonic head to vibrate the metal component against the plastic one. The Welding Horn couples directly with either the insert or the thermoplastic part.  Ultrasonic vibrations heat and soften the plastic part, allowing the metal part to be inserted. As the plastic cools, a very strong bond is made.

Applications for ultrasonically inserted components include:

  • Threaded inserts or studs
  • Metallic webs or grills (speaker covers, etc.)
  • Permanent magnets
  • Electric contacts

If you have a project that need metal staping and plastic molding service and ultrasonic Insertion, you are welcome to send us, if your project needs molding Ultrasonic Welding servcie, contact us as well, we will quote your complete price for you.

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 Mold Repair/Refurbishing/Maintenance, Fast Turn-Around Time, Original Manufactured Plastic Parts

SINCERE TECH, one of the most trusted custom China plastic injection mold company specialized in mold design, mold making, plastic molding service, and engineering. has been making molds for around 15 years. Their staff of industry professionals provides you with innovative and cost-effective mold-making & molding part solutions.

In addition to our injection mold building capabilities, SINCERE TECH offers complete injection mold repair, refurbishment and maintenance services, if Sincere Tech Produce the molding parts for you, all of mold repair, maintenance are cost-free, if for export molds, during the mold lifetime guarantee shots, any components have issue, Sincere Tech will make mold components with free cost.Plastic Injection Mold Repair

Even the best-made, top quality plastic injection molds need to be maintained and serviced regularly to keep them performing properly and ensure their productive lifespan.

Sincere Tech’s plastic mold company located in the Dongguan City, Guangdong Province China, if you are not happy to any of your plastic molding supplier, you can take the mold to our factory, we will do all of mold repair jobs for you, after the mold repairing jobs finished, you can take to anywhere you want to go or let us produce the plastic molding parts for you.

Shortly after receiving the mold at our facility, we will perform a series of inspections, and present you with a detailed analysis of the mold and the repairs required to return it to production. Once the repairs are complete, the mold is tested by our technicians.

Benefits of Mold Repair and Modification

Sincere Tech’s Molds and Engineering not only produces the highest quality molds available today, but we also provide the highest quality repairs and rebuilds And we stand behind our word. Our warranty guarantees the mold will retain its integrity throughout a specific number of cycles, or we will repair it at no additional cost.

In addition to considerable cost savings versus building new molds, repair or modification to your existing mold offers a number of other benefits, including:

Fast turn-around time – get back in production with minimal downtime

Keep your mold in original condition with original Sincere Tech’s manufactured parts

In-House recordkeeping of all work performed

Full 3D mold redesign and send you back for approval and data record

Sincere Tech can repair or modify numerous types of molds, including:

Insulated Runner

Unscrewing Molds

Cam Molds

Single Shot, Two-Shot, and Multi-Shot

Cold Runner

Insert Molds

Stack Molds

Encapsulation Molds

Over Molds

EDM Machining: Electrical Discharge Machining, Spark Machining / Eroding, Metal 3-D Geometry, Accurate Repeatability, Intricate Detail, Sharp Corners, Patterns

Electrical Discharge Machining (EDM) from SINCERE TECH provides CNC (computer numerical control) accuracy for creating 3-D geometry in hardened steel and other metals like brass, copper, and aluminum. It can be used to create simple or complex shapes. SINCERE TECH has 11 EDM machines, one AgieCharmilles EDM machine and one Sodick EDM machine for mirror surface EDM machining, two double heads EDM machines for high-efficiency EDM machining requirement

The EDM process is an excellent solution when a high degree of accuracy, and/or repeatability, is required.

EDM: What It Is and What It Does

Sometimes referred to as spark machining or spark eroding, EDM is a method of removing material by a series of electric discharges using copper electrodes or Graphite electrodes, rapidly arcing between an electrode acting as the cutting tool and the workpiece, in the presence of a dielectric fluid.EDM service

EDM is used to burn material away from the metal mold component, to add:

  • Intricate detail
  • Sharp corners
  • Patterns

The EDM cutting tool is computer-guided along the desired path very close to the work but does not come in physical contact with the piece, preventing plastic injection tooling marks.

A continuous sparking action produces a series of micro-craters on the workpiece and removes excess material by melting and vaporization. The particles are then washed away by a continuous stream of dielectric fluid.

EDM Services: SINCERE TECH Provides Quality Results and fast service for your plastic injection mold

SINCERE TECH’s EDM services can give your design potential a boost. You will be able to place intricate designs and logos in a wide variety of components with top quality results. This process can be used to produce:

  • Faceplates
  • Nameplates
  • Bezels
  • Buttons
  • Switches
  • Gears
  • And much more!

EDM can also be used in fabrication, for tapping holes into parts, and similar procedures.

If you are looking for a plastic mold supplier that offer you fast delivery, high gloss plastic molding parts, texture surface plastic mold, and all other custom plastic injection tooling or molded parts, you are welcome to send us your requirement, we will offer you the best price and quality.

China has become a major destination for plastic mold & molding service. Lower prices are the primary incentives for many foreign buyers. The majority of foreign buyers find challenges sourcing plastic injection molding from China. The major strains are on how to buy, how to evaluate quality, or how to identify a reliable source.

Many things go wrong in case of compromise in the purchase process. For example, delayed delivery, frauds, low quality, weakness of communication (both on language and technical), and other problems may be encountered. To avoid such frustrations, the following is a process of how a buyer would purchase plastic injection molding from China. Hope this could help you find your best suitable supplier

1. Identify a Reliable Plastic Molding Manufacturer

Currently, there are many mold manufacturing companies in China. You need to determine which supplier is reliable. Some of the factors to consider include, mold price, quality, quantity, accessory standard, communication, lead times, and the mold design, among other factors.
Using the World Wide Web, you can easily find a wide range of plastic molding suppliers from the internet, sourcing agents, and trade shows, etc.

It is important to contact several suppliers before making a decision on a suitable supplier.
Buy Plastic Injection molding from China

2. Evaluate the Various Mold/Molding Manufacturers

Conducting market research on the various plastic molding manufacturers helps to find a suitable fit for the business. So how can one evaluate the Chinese mold makers to identify a reliable source?
Sending inquiries helps the evaluation process. You should focus on asking questions that evaluate the core competence of the plastic molding companies.
A good supplier is one that shows interest in your projects, has effective communication, knowledgeable, detail-minded, and honest. The evaluation should target to identify the salient attributes of the supplier, for example, what is advantages do they have, is it suitable for your project? Have they done any similar projects like yours? All of the information will help to make your project smoothly or not.

3. Information Verification

Not all manufacturers are who they say they are. The customer should be able to verify the plastic molding manufacturer. Some of the information that can be verified include:

  • Type of mold parting line
  • The type of ejection modes, whether pins are used and the particular locations,
  • Surface requirement on the visible surface
  • The location and type of gates

Such information helps to verify the mold designs and product appearance. the most important thing is basing on this discussing with each other you will know their communication and technology ability. A supplier that verifies the information and offers samples is reliable.

4. Analysis of Production Issues that may Arise

A good plastic molding supplier should communicate the issues in advance and concerns that may arise in the production process, and actions are taken to address the issue. A good injection mold company should analyze the current design and offer rational recommendations, we call this DFM report.
Some of the important questions that help identify some of the issues include;

  • Have you produced similar molds/products before?
  • What were the challenges encountered?
  • Can you send your quality control inspection report?
  • How do you address the issues that arise?
  • Do you offer compensation for compromises?

With all the information, you should already have identified which Chinese molding company to source from.

5. Firm/Supplier Site Visit 

Depending on the quantity of supply sourced, visiting the supplier may be important. For large quantities of plastic molding service, traveling to China should be a basic step. The objective is to analyze samples and evaluate the reliability of the supplier.

Go to their plastic molding company on site to communicate with them face to face, then you will know how the technical skill, English ability, etc.  But mostly not always have time to check their mold factory, so we suggest you may ask for a skype video shows if you have no time to visit them.

At SINCERE TECH will take Skype video meeting to show you around our plastic mold and molding factory if you have no time to visit our factory, our sales and project manager speak good English and have the professional technical skill, you will know this during the video shows. if you are interested in our service, you are welcome to contact us.

6. Maker A Contract

Importing products from China and Asian nations can be risky and complicated. Contracts are antidotes against the common mistakes and issues that may arise. It is essential for buyers to get into a contract for the following reasons;

  • To maintain clarity on product specifications and avoid misunderstandings. The specifications of the product can be easily lost in Skype or mail communication.
  • Compensation terms help suppliers to think twice about compromise.
  • Contracts help to communicate on how severe your business is
  • It helps to avoid delays

The first time you work with a China plastic injection molding company (same to work with your local supplier), you should always make agreements on contracts to avoid scams and fraud. Suppliers who default the negotiations should be responsible for making refunds and necessary compensations.

7.Payment and Delivery

Based on the set agreement, the amount can be paid by one time or two times ( maybe more times). The payment method depends on the agreed strategy. Some companies make payments via Paypal, Skrill, Payoneer, Western Union, Cheque, or other policies. Our standard payment term is T/T wire transfer. If the small amount. PayPal is still available,  this is method is normally working for all of the companies in China, especially for custom plastic molding manufacturing service.

Concluding Thoughts 

Buying plastic molding from China can be challenging. However, if you follow the seven steps, the process is easy and with no compromise. when you find your reliable partner from China, then your business will be increased rapidly, this is verified by lots of companies like Apple, and other car companies (over 80% of car companies buy their auto car molds from China), etc.

Doing online businesses have fraudulent operations. You should be cautious on the approach of doing business online to avoid frustrations, lots of company doing online business with China and successful to the business, also some of the customers had issues when doing business with Chinese manufacturers, or even have issues with your local supplier as well, do you agree?  The above steps could help you avoid this issue and the success of your business.

Need any plastic injection mold/molding companies from China? Contact us now, you will find out we are your best partner in China. Welcome to talk with us on any questions.