Curved injection molded parts

Bent is because the excessive internal stresses in injection molded parts.

Lower the injection pressure.

Increase the cycle time (in particular, cooling time). Especially the thick injection molded parts within the mold. Immersed in warm water (38° c or 100degrees c) immediately after Crest and slowly cooling the injection molded parts.

Mold filling is slow.

Increase the injection speed.

Lack of plastic in mold cavity.

Increase the volume of the shooting.

Plastic's temperature is too low or inconsistent.

Increase the temperature of plastics.

Injection molded parts is too hot when inject.

Cool the equipment.

Mold cooling's capacity is not enough.

Increased the cooling capacity (speed of the cooling liquid mold).

Stains remove in a cooling pipe.

Mold cooling pipes imbalances so as to bring to injection molded parts of uneven cooling rates.

Check the mold surface temperature, if it needs to be two halves of the mold parts with different temperatures.

Installing the cooling pipes and cavity surface close to each other.

Improper design of the gate location.

Injection molded parts the thickest part of the open gate.

Use thin gate where possible (the smaller the width of the gate, bent more).

Feed system size is too small.

Increase the size of runner or note.

Do not use the half circle runner.

Because of the mould core offset or movement, it casues thick injection part wall.

Check that the core or cavity position, if its incorrect just correct them.

All types of filler in plastics.

In the glass reinforced plastics use glass spheres instead of glass in tow.

Improper design of the injection molded parts (that is, not the thickness and sudden changes in thick-walled)

Use consistent thickness of wall and gradually shift wall to redesign the injection molded parts.

Design a correct selection of plastic injection molded parts (like gate types and the liquidity wall thickness of plastic to the flow of long scale).