Injection Molding Parts Sticking

3 overhigh melt temperature.

Injection molding parts sticking.

Parts sticking in. The parts may be picked by a robot ejected off the mold to fall onto a conveyor system or hand picked by an operator after each cycle. Parts sticking in the mold. Injection molding is a manufacturing process for producing parts by injecting molten material into a mould or mold injection moulding can be performed with a host of materials mainly including metals for which the process is called die casting glasses elastomers confections and most commonly thermoplastic and thermosetting polymers.

The root causes of such sticking can be traced to one of several equipment or process issues. In that case we. If the injection molding machine is too large in size with a high speed screw great injection pressure and very long injection pressure holding time overfill will be caused making molding shrinkage smaller than expected thus leading to sticking sprues or parts. For a processor finished parts sticking in the mold can be an absolute headache.

Take time to do a proper short shot study. 8 process missteps can cause parts to stick in injection molding published on august 7 2015 august 7. 5 incorrect design of draft. If there are surface defects such as gouges nicks scars and dents in the mold cavity and sprue bush.

The injection parts stick to the mold making it rather difficult for ejection. Keep in mind that where the part sticks in the mold is not necessarily the area of the mold that is the cause. The causes thereof comprise. Feel free to contact us if you have questions about our products and how they might solve your injection molding problems.

Written by jeremy cooley on. The surface of the mold cavity and sprue bush is rough. Imbalanced filling especially in a multi cavity tool can cause over or under packing issues and subsequent part sticking. 1 too much injection materials.

Make a shot with no hold pressure where the largest part is only 80 full. Material sticking in the mold can be a production killer whether it is the sprue or the formed part in the cavity. 2 overhigh injection pressure overlarge dwell pressure and overlong dwell time. Because injection mold buildup could also be an issue with sticking parts you could also try one of our mold cleaners like clean n run mold brite power clean kleen all and zap ox.

Several process missteps can cause parts to stick. 4 overlow or overhigh mold temperature. The reasons and corresponding solutions are described as follows.