In the injection molding process, resin is usually injected while the mold is completely closed to obtain a molded product.
If the product wall thickness is thin (about 1.0 mm), pressure loss tends to occur during resin flow, which may cause filling defects (short shots) or sink marks due to insufficient pressure retention.
(This can cause short shots or sink marks due to insufficient pressure retention.
One of the countermeasures to this problem is a process called injection compression molding, which allows molding even at low pressure.
In this method, the mold is left slightly open while the resin is being filled, and the mold is closed before it is completely filled.
The mold is then closed before it is completely filled to achieve the desired wall thickness.
Advantages
Filling pressure can be reduced to 1/3 of normal molding.
Mold clamping force can be reduced to 1/2 of normal molding (lower equipment cost).
No problem in molding thin walls such as 1.0 mm.
However, depending on the product shape, we may not be able to offer this service.
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