There are many reasons for burrs in injection molding. It is necessary to comprehensively consider various factors such as injection molds, mould supplier ，injection molding processes, and raw materials.

mold

Injection mold precision is poor. The flatness of the core can create gaps when the mold is closed, resulting in burrs on the parting surface.

Injection molding process

Too much material added during injection molding can cause burrs. If the temperature of the injection barrel, nozzle or mold is too high, the viscosity of the plastic will decrease, the fluidity of the plastic will increase, and it will also cause burrs on the parting surface.

raw materials

Too high or too low viscosity of the plastic material can cause burrs on the parting surface. The uneven size of plastic particles will change the feeding amount of the barrel, and burrs will appear on the parting surface.

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