PP Material OEM ODM HASCO Precision Plastic Mold Cold Runner

Auto parts- Plastic molds with material PP , two cavities

Issue Solution example:

Warping

Description: Warping (or warpage) is the deformation that occurs when there is uneven shrinkage in the different parts of the molded component. The result is a twisted, uneven, or bent shape where one was not intended.

Causes: Warping is usually caused by non-uniform cooling of the mold material. Different cooling rates in different parts of the mold cause the plastic to cool differently and thus create internal stresses. These stresses, when released, lead to warping.

Remedies:

1. Ensure that the cooling time is sufficiently long and that it is slow enough to avoid the development of residual stresses being locked into the part
2. Design the mold with uniform wall thickness and so that the plastic flows in a single direction.
3. Select plastic materials that are less likely to shrink and deform. Semi-crystalline materials are generally more prone to warping.

This part for car rearview:

Burn Marks

Description: Burn marks are discolorations, usually rust colored, that appear on the surface of the injection molded prototypes.

Causes: Burn marks are caused either by the degradation of the plastic material due to excessive heating or by injection speeds that are too fast. Burn marks can also be caused by the overheating of trapped air, which etches the surface of the molded part.

Remedies:

1. Reduce injection speeds
2. Optimize gas venting and degassing.
3. Reduce mold and melt temperatures.

Jetting

Description: Jetting refers to a situation where molten plastic fails to stick to the mold surface due to the speed of injection. Being fluid, the molten plastic solidifies in a state that shows the wavy folds of the jet stream on the surface of the injection molded part.

Causes: Jetting occurs mostly when the melt temperature is too low and the viscosity of the molten plastic becomes too high, thereby increasing the resistance of its flow through the mold. When the plastic comes in contact with the mold walls, it is rapidly cooled and the viscosity is increased. The material that flows through behind that viscous plastic pushes the viscous plastic further, leaving scrape marks on the surface of the finished product.

Remedies:

1. Increase mold and melt temperatures.
2. Increase the size of the gate so that the injection speed becomes slower.
3. Optimize gate design to ensure adequate contact between the molten plastic and the mold.

Plastic material

B3Z , Nylon+GF, PC/ABS, PBT+GF, PP, POM, PMMA Accordingly

3D Design Software

Solid works, NX, Pro-E, Auto-CAD(NX, Master CAM) for CAM Software

Mold Application

Automotive,electronic,industrial,architectural,medical,consumer & etc

Product Type:

Precision Injection Molding products for cars spare parts

Mold Cavity

Single mold, Multi cavity mold accordingly

Hot Runner

MOLDMASTERS, YUDO, HASCO, DME, INCOE, SYNVENTIVE

Mold Standard

HASCO, LKM, DME

Mold life

300,000-3,000,000 shots

Molding machines

20 injection machines from 50-160tons