Thin wall molding is a relative term that implies the flow length is long with respect to the part thickness and material viscosity… Question: Our thick PVC parts require a higher packing pressure than the injection pressure, yet the training states this is typically the case for thin-wall molding. In our case, the parts are […]
Category Archives
Plastics Technology
Some Causes for Premature Tie Bar Failure…
Keep in mind that clamp maintenance should be routine and comprehensive. Once a tie bar breaks, it is critical that you ensure everything is level, parallel, lubricated, and functioning properly. If you are unsure, have an expert come in to perform a detailed analysis of your tie bars, platen movement, lubrication, bushings, and leveling. Question: […]
Check Your Short Shot when Troubleshooting…
Recently we were assisting a customer in troubleshooting a problem with inconsistent recovery via email. This was a great reminder that it is always important to check and ensure there is a short shot at the start of troubleshooting most problems. Customer Issue (shortened): During a rear zone study, the customer was encountering complications with […]
Check Ring Test on a 2-Shot Machine…
It is always best to isolate the barrel so the check ring is the only thing being tested, and outside influences are minimized. Question: With a 2-shot machine, how do I perform a check ring capability study on my 2nd shot? My Response: You want to run the shot by itself if possible. Using both […]
Flash, with Lower Part Weight…
Just because the mold is flashing, does not mean the part weight has increased… Question: Hello, we have a part which is flashing, but the part weight is lower than before. Does this make sense? Answer: When this is the case, it is usually caused by too much material entering the mold during injection. As the […]