Category Archives

I received this follow-up question regarding a previous blog entry…  Rafael If you recommend the mold is only filled 95-98% during first stage, how is 100% determined? My Response Personally, I view a 100% full part as the weight of one where the polymer just reaches the end of fill… such a part would have […]

I just recently received this question from a mold maker… KG When would you recommend the use of cashew gates? note: Cashew gates, or banana gates, are semi-circular gates which tunnel under the parting line to gate on the underside of the part. During ejection, they detach from the part and curl out of the […]

I received a series of follow-up questions from yesterday’s blog entry. I will do my best to paraphrase and answer… Blog Reader One machine has a 30mm screw (3100 bar max pressure), and one has a 40mm screw (1800 bar max pressure). Both have the same size injection cylinders. When I transfer from the 30mm to the […]

I corresponded with a frequent blog contributor late last week… Milan If my fill time varies 0.02 seconds, is that a machine problem? I have a similar machine with 0.00 seconds variation. note: after a few emails, it was determined… 200 ton hydraulic machine 38% shot size 0.55 second fill time Possibly a pressure limited […]

This question arrived in my e-mail the other day… Jason In a previous blog you mentioned the term ‘Vent Drop’. Could you explain how these are typically incorporated into the mold design? Note: Jason is referring to the post Venting Issues which states: One commonly overlooked aspect to venting is the vent drop. Behind any well designed vent […]