Precision Injection Molding

Precision mold parts must meet certain performance requirements to ensure their durability and longevity. 

1. Strength and Toughness: Precision molds and tooling components often operate under harsh conditions, which can result in brittle fractures due to large impact loads. Therefore, it is essential for precision molds to have high strength and toughness to prevent sudden breakage during the working process. The toughness of molds and tools depends on factors such as carbon content, grain size, and microstructure of the material.

2. Fatigue Fracture Performance: High-precision injection mold parts often experience fatigue fracture during operation due to the long-term effects of cyclic stress. This can include multiple small energy impacts, tensile, contact, and bending fatigue fractures. This characteristic of custom molding and tooling depends on factors such as strength, toughness, hardness, and content of inclusions in the material.

3. High-Temperature Performance: When the working temperature of precision molds and dies is high, the hardness and strength of the material can be reduced. This can lead to early mold wear or failure due to plastic deformation. Therefore, it is important for the mold material to have high tempering stability to ensure that the mold maintains high hardness and strength at working temperature.

4. Cold and Hot Fatigue Resistance: Some molds are subjected to repeated heating and cooling during the working process, which can cause the cavity surface to be pulled and stressed. This can lead to surface cracking and spalling, increased friction force, and reduced dimensional accuracy. Hot and cold fatigue is one of the main forms of hot working tool failure.

5. Corrosion Resistance: In some cases, molds may be exposed to strong corrosive gases during operation, such as in plastic injection molding. These gases can erode the cavity surface, increase surface roughness, and intensify wear loss effects. This is due to plastic decomposition that produces elements such as chlorine and fluorine that precipitate HCI and HF.

The Components of Precision Moulds 

The success of precision mould includes the following:

• Precise control of the mold cavity size

• Precision of parting surface

• Exact solution of material

• Strict requirement for a tolerance

• Venting design

• Material flowing

• Cooling system

• Choosing of steel material

• Overall excellent tooling design

Process of Precision Mould

Packson's  quoting system enables us to make quotations quickly by our professional quotation engineer

• Send us your part 3D to get your mold and part quote

• Confirm quotation and order issues, Packson starts the mold and precision mold parts order process

• Making DFM and create processing solution

• Tooling design review by Packson engineers

• Get approval of the design, Packson start building your injection mold

• Customer checks samples for approval

• Part mass production begins

Applications of Precision Mould

As mentioned earlier, precision mould is used for the development of various products. But this technology has really revolutionized the development of lenses in various applications because it allows OEM to manufacture cheaper and stronger glass-free lenses. Glass lenses are very delicate, difficult to manufacture, and expensive, but plastic optical lenses have completely changed the optical industry. Precision molding is used for the development and mass production of precision spherical, diffraction, free-form surface, aspheric, and other types of lenses. It is a high-quality product with a perfect optical surface finish.

Packson Precision Moulds Show