Injection mold factory Processing

1) The processing pressure is too high, the speed is too fast, the filling is more, and the injection and pressure holding time are too long, Injection mould The factory will cause excessive internal stress and crack.

2) Adjust the mold opening speed and pressure to prevent the rapid forced drawing parts from causing mold release cracking.

3) The mold temperature shall be properly raised to make the parts easy to demould, and the injection mold factory shall properly lower the material temperature to prevent decomposition.

4) Prevent cracking due to low mechanical strength caused by weld lines and plastic degradation.

5) The release agent shall be used properly, and the injection mold factory shall pay attention to eliminating the aerosol and other substances attached to the mold surface.

6) The residual stress of parts can be eliminated by annealing heat treatment immediately after forming to reduce the generation of cracks.

Injection mold factory mold

1) The ejection shall be balanced. For example, the number and sectional area of ejector rods shall be sufficient, the demoulding slope shall be sufficient, and the cavity surface shall be smooth enough to prevent cracking due to the concentration of residual stress in ejection caused by external forces.

2) The workpiece structure shall not be too thin, and the transition part shall adopt arc transition as far as possible to avoid stress concentration caused by sharp corners and chamfers.

3) Metal inserts shall be used as little as possible to prevent the internal stress from increasing due to the different shrinkage rates of inserts and parts.

4) For deep bottomed parts, proper demoulding air inlet duct shall be set to prevent vacuum negative pressure.

5) The main runner is enough to demould the sprue before it can solidify, so it is easy to demould.

6) The connection between the sprue bushing and the nozzle should prevent the cold and hard materials from dragging to make the parts stick to the fixed mold.

Material of injection mold factory

1) The content of recycled material is too high, resulting in low strength of parts.

2) Excessive humidity causes chemical reaction between some plastics and water vapor, which reduces strength and causes ejection cracking.

3) The material itself is not suitable for the processing environment or has poor quality, and will cause cracking if it is polluted.

Different injection molds of injection mold factories have different requirements. To sum up, the performance requirements of plastic molds for mold steel are mainly reflected in hardness, polishing, etching, welding, wear resistance, toughness, dimensional stability, corrosion resistance, etc.