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:
- 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
- Design the mold with uniform wall thickness and so that the plastic
flows in a single direction.
- 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:
- Reduce injection speeds
- Optimize gas venting and degassing.
- 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:
- Increase mold and melt temperatures.
- Increase the size of the gate so that the injection speed becomes
slower.
- 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
