Injection Molding Parts Sticking

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.

Injection molding parts sticking.

2 overhigh injection pressure overlarge dwell pressure and overlong dwell time. Several process missteps can cause parts to stick. Sticking might be caused by inadequate or no mold release in the resin. The reasons and corresponding solutions are described as follows.

The causes of parts sticking and sprue sticking are multifaceted among which mold failure is one of the main reasons. Written by jeremy cooley on. The root causes of such sticking can be traced to one of several equipment or process issues. The surface of the mold cavity and sprue bush is rough.

1 too much injection materials. If there are surface defects such as gouges nicks scars and dents in the mold cavity and sprue bush. In that case we. Material sticking in the mold can be a production killer whether it is the sprue or the formed part in the cavity.

Parts sticking in. Imbalanced filling especially in a multi cavity tool can cause over or under packing issues and subsequent part sticking. 4 overlow or overhigh mold temperature. Take time to do a proper short shot study.

Make a shot with no hold pressure where the largest part is only 80 full. Feb 13 2019 1 00 pm. For a processor finished parts sticking in the mold can be an absolute headache. 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.

The causes thereof comprise. 3 overhigh melt temperature. The injection parts stick to the mold making it rather difficult for ejection. Parts sticking in the mold.

5 incorrect design of draft. Feel free to contact us if you have questions about our products and how they might solve your injection molding problems. 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.