How to select mould steel for hanger mould?

When the melt plastic material is deformed in the hanger mold cavity, it flows and slides along the surface of the cavity, causing violent friction between the surface of the cavity and plastic, which causes the mold to fail due to wear. Therefore, the wear resistance of the material is one of the basic and important properties of the mold.

Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.

Generally we will consider P20 when choosing mold steel, this mold steel can guarantee at least 300,000 mold life under correct operation. Our minimum standard is P20 material, and poor steel is not guaranteed for quality. Of course, if want better steel can consider using 718H steel, the material itself can guarantee 500,000 shots, suitable for products with more output. We can use S136 steel if plastic material is corrosive which can guarantee the minimum level of 1 million shots. H13 steel material also has a certain degree of corrosion resistance and is with excellent work performance.

Professional mold companies will give you the most suitable solution based on plastics and production.

Our mould can be in cold runner, hot runner system according to customer needs with multi-cavities and at short cycle time.

We are equipped with technically advanced tools and requisite facilities, CNCs, milling, machine lathe, grinder, line cutting, EDM, drilling and other equipment. Welcome to contact anytime for the possible cooperation.

Maintenance of plastic hanger mould before production:

1. Clean the hanger mould surface for the oil, rust, and check mould cooling hole.

2. Check the sprue if there is residual material.

3. Check the fixed mold plate and confirm if the screw clamp is tightened.

4. After hanger mould fixed on the injection molding machine, injection operation should be carried out first. Observe the movement of each part of the operation: whether there is abnormal phenomenon, the moveable parts such as the guide pins, the ejection pins, sliders whether there is wear, lubrication is good or not etc.