High Precision Injection Mold

WIT MOLD specializes in manufacturing a wide range of custom precision mold components and machined parts that have passed ISO 2009:2015 international quality standards. We are dedicated to building custom, durable, high quality precision mold parts with the spirit of craftsmanship. With the precision machining process of engineers with ten years of experience, we are able to provide our customers with more efficient, high precision and economical designs and products. We provide precision molds that consistently meet or exceed industry standard tolerances, up to ±0.002mm.


What is precision injection molding?

Precision injection molding is a method demanding unparalleled accuracy in shaping plastic components. Unlike mass production, it’s reserved for cases where precise forms are crucial. These precise plastic parts are commonly used in replacing high-precision metal parts in fields like instruments, electronics, optics, and medical equipment. Due to these stringent requirements, precision injection molding relies on precise molds and machinery, making it a complex process.

The size tolerance of precision injection molds is controlled to less than 1/3 of the product size tolerance. The mold’s precision depends on factors such as the accuracy of cavity size and quantity, cavity positioning, accuracy of parting surfaces, material selection, size tolerance, and more. Factors like the thickness of the base plate, support plate, cavity walls, and runner size are crucial for precision molds. The design engineering is equally vital, with molds typically made from high-strength alloy steel.

Precision Injection Molding Process:

Every component developed in precision molding projects must be identified, as their connection is uniform. This ensures a slow, stable, and concentrated precision molding process. The uniqueness of the process for each project emphasizes the importance of mold, part design, material selection, and procedures for successful precision molding.

Precision injection molding machines must control product accuracy and repeatability. The machine should feature a rigid clamping system, part size tolerance control, molding speed, and various components like the screw, screw head, barrel, and collar, all controlled within 0.05 to 0.08mm.

Precision injection molding is a game-changer for industries requiring high-tech, detailed, and complex parts in large quantities. WIT MOLD’s expertise in design and manufacturing ensures a seamless experience in large-scale production. Embrace the precision for a future of cost-effective, efficient, and customized manufacturing.

Why Choose Precision Injection Molding?

When high-tech parts are needed for a project requiring large-scale production, precision injection molding is a wise choice due to its cost-effectiveness, complexity handling, strength, efficiency, and design freedom. WIT MOLD stands out in providing seamless and effortless experiences in large-scale manufacturing.

Advantages of Precision Injection Molding:

High cost-effectiveness due to automation and repeatability, reducing labor costs and increasing productivity.
Capability to mass-produce high-level details.
Strength: Plastic can be made robust by adding fillers or mixtures, even at a lower cost.
Efficiency: Faster than traditional methods, producing more parts with a single mold.
Design freedom: Customized precision molds allow better control and customization.

Precision molding part performance requirements

High precision tooling and tooling components often operate under harsh conditions. Some are usually subjected to large impact loads that result in brittle fractures. Therefore, precision molds should have high strength and toughness. This is to prevent the molding parts from breaking suddenly during the working process. And the toughness of molds and tools mainly depends on the carbon content, grain size and microstructure of the material.

High-precision injection molding parts often fatigue fracture when working. This is due to the long-term effects of cyclic stress. Forms include multiple small energy impact, tensile, contact and bending fatigue fracture. In general, this characteristic of custom molding and tooling depends on these factors. For example, its strength, toughness, hardness, and the content of inclusions in the material.

When the working temperature of precision molding and dies is high, the hardness and strength will be reduced. And it will lead to early molding wear or failure due to plastic deformation. Therefore, the molding material should have high tempering stability. It can ensure the molding has high hardness and strength at working temperature.

Some molds are in the state of repeated heating and cooling during the working process. Then, it causes the cavity surface to be pulled and stressed, leading to surface cracking and spalling. As a result, it increases the friction force. In addition, it prevents plastic deformation and reduces dimensional accuracy. Finally, it leads to molding failure. Hot and cold fatigue is one of the main forms of hot working tool failure.

In the working process of some molds, such as plastic injection molding, they produce strong corrosive gases. As the plastic contains chlorine, fluorine and other elements, it will decompose and precipitate HCI and HF. they erode the cavity surface, increase the surface roughness and intensify the wear loss effect.

Factors Affecting Precision Injection Molding:

Cavity size precision
Accurate cavity positioning
Parting surface accuracy
Material selection
General precision mold size tolerance
Number of cavities in mold design
Thickness of base plate, support plate, cavity walls
Runner size
Material of precision mold (preferably high-strength alloy steel)
Design engineering


Q1: What industries benefit from precision injection molding?
A1: Precision injection molding caters to industries like electronics, medical devices, optics, and instruments.

Q2: How does precision injection molding reduce costs?
A2: Automation and repeatability in precision molding reduce labor costs while boosting productivity.

Q3: Why is design freedom crucial in precision molding?
A3: Customized precision molds offer better control and allow tailored designs for specific projects.

If you need further assistance in selecting the appropriate Precision injection molding for your production needs, please contact us. Our suppliers are ready to provide expert guidance and support to help you achieve the best results in your manufacturing processes.


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