Excess molding material that penetrates into mold gaps (i.e., between parting faces, slide push-out faces, and inserts, etc.) in a molten state.

• Insufficient mold clamping pressure in the molding machine
• Aging of the die

• Insufficient mold clamping pressure
• Insufficient precision at the die's mating faces
• The molded product is arranged in a cantilever-type setup as a result of die design

• Plastic has low viscosity

If there is insufficient clamping pressure, estimate the correct pressure using the following equation and choose an appropriate molding machine.

Die clamping pressure = Projected surface area x die-internal effective injection pressure / 1,000 kg

In the case of ABS, a rough value for 400 kg/cm2 can be used in this calculation for the die-internal effective injection pressure

• Switch to a suitable molding machine.
• If the problem is related to mating faces, a joint examination must be carried out with the die machining company.