The durability of the injection mold is greatly related to the material used, so it is necessary to pay attention to the selection of the mold material. Generally speaking, the mold material should have the following properties:
(1) High wear resistance
In order to increase the rigidity and mechanical properties of the plastic parts, the glass fiber and inorganic filler are widely used in the plastic formulation. After adding these additives, they enter the mold cavity with the molten material at high speed. The friction of the inner cavity of the mold is very great. If the mold material is not wear-resistant, it is easy to make the cavity overwear. Therefore, Materials for making such moulds should have better wear resistance.
(2) High corrosion resistance
Many plastics additives, such as flame retardants, and even the chemical action of the melt itself will corrode the mold cavity. When the plastic materials are mixed with abrasive filler and reinforced material, it is more likely to aggravate the damage of the mold. In this case, it is best to use corrosion resistant steel, or to electroplating, chrome or nickel plating on the mold.
(3) Good thermal conductivity
In injection molding, good mold temperature control has a great impact on the quality of plastic parts, especially in the processing of semi-crystalline thermoplastic is more important. Copper alloys usually have much better thermal conductivity than alloy steel, but their modulus of elasticity, hardness and durability are lower. Inadequate thermal conductivity of steel can be compensated by cooling system.
(4) Good dimensional stability
In the molding operation, the temperature of the mold cavity is above 300 degrees centigrade and the temperature difference is so large that the microstructure of the cavity can be changed easily. Thus the size of the mold is changed and the size of the plastic part is unstable. Therefore, the tool steel, which is properly tempered, can be selected, that is, the heat treatment steel. In order to improve hardness and wear resistance, the mold must be heat-treated. However, this heat treatment should be made to minimize the size of the mold, can be used to cut the pre-hardened steel, this steel after machining without heat treatment.
(5) Good polishing performance
The inner wall of the mold cavity is very high and the roughness is very small to meet the requirements of good gloss on the surface of the plastic parts. In this case, the mold cavity is usually polished. The better the surface is, the better the polishing of the mold material.
JasonMould Industrial Company Limited, established in 2010, is a leading injection moulding manufacturer in China. JasonMould specializes in plastic mould production for household appliances, medical equipments, electronic equipments, safety equipments as well as monitoring system.
The company has over 15000 square metres factory. With plastic injection tooling divisions possessing different machinery and expertise, JasonMould offers tools from small and precise mobile phone parts to as big as automotive parts. Our tools are mainly exported to U.S.A., Europe, Japan and UK. JasonMould’s diversification strategy and full service has won compliment from customers all over the world.
Our mission is to provide our customers high quality moulding products and services. We aim to exceed our customers’ expectations of pricing, quality and on-time delivery. To achieve our mission, JasonMould:
- Commits to continually improve employee skills and efficiency,
- Provides our employees a clean and safe working environment,
- Upgrades machine technology and support equipment through a strict maintenance program, and
- Maintains customers’ tooling to its highest peak of performance
For more about custom manufacturer of plastic molding products,please visit https://www.jasonmolding.com/
Contact person: James Yuan
Company name: JasonMould Industrial Company Limited
Address: LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
Email: [email protected]