It is always critical to check your first stage short shot since it affects both mold filling and part packing. Request: Please provide reasons & remedies of burn-mark or weld line problems in plastic (HDPE) moulded product during the injection moulding process. My Response: There are many possible causes, but injection should be checked first: […]
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Routsis Training
Cavitation Reduction Concerns
Cavitation reduction is not as simple as blocking off a couple cavities and continuing to run. The process should be as close as possible to the original process, but this will require an adjustment to the process inputs. Question: Do you have a good process for blocking cavities? My Response: The process is almost identical […]
PVC Packing vs. Thin Wall Molding
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 […]
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 […]