Author Archives

A technician encountered this interesting problem yesterday… Kevin We have been working to achieve 95-97% fill during first stage fill with zero hold time and pressure. As soon as I apply hold pressure and time, the screw continues at speed after transfer. My machine has a hold speed minimum setting, but no option to turn this setting off. I […]

A common blog reader asked this question regarding family molds… Jim What is the best way of balancing a family mold? My Response When balancing family molds, it is best to approach it in two steps. Step 1 – Balance the runner system – When possible, try to balance the runner system so that each gate starts filling the […]

I received a follow-up question regarding a blog entry last week… ED We switched our product line over to 4710 PE 100 extruder grade PE about 2.5 years ago. The material was produced in Belgium. We sized all of our new tooling to this material.In February they started making the material in Texas. The supplier says the […]

This question arrived via email yesterday… John Why is there water running through the barrel of an injection molding machine? My Response The basic purpose of the water is to cool the feedthroat to avoid bridging. The feedthroat is the area of the barrel where the material passes through from the hopper the screw. If this area gets too hot, the material may […]