Just because a machine is capable of processing at high temperatures, does not mean it is optimized for use at these temperatures. A machine which spends most of it’s time at high temperatures should be purchased and designed for that intent. A failure to do so will result in potential inefficiencies and premature equipment failure. […]
Category Archives
Plastics Technology
Scientific Molding & Valve Gates…
The basic principles apply whether you are using valve gates or not. In theory, you try to use one flow rate through the gates whenever possible to fill the mold because it reduces variation in the process due to a consistent shear on the material. Question:One of your recommendations on scientific processing is to avoid […]
Making Change Stick…
Implementing change takes time. Change is a critical aspect of business today, but you cannot just say ‘Do This’ and expect everyone to jump on board immediately. Issue: Every time we implement something new, our people go back to the old ways in just a couple weeks. My Response: It takes 3-6 months to replace […]
Improving Mixing…
Screw speed is not the most consistent method of improving mixing within the barrel. Back Pressure and Melt Temperature are more consistent and reliable methods of mixing your polymer. Question: I read your post on using a slow screw for long cycle time for processes like ours. My techs tell me they need to use […]
Slow Screw Speeds…
On the newer electric injection molding machines, there is typically no detriment to using a slow screw speed for longer cycle times. This will just result in a more uniform and consistent melt. Question: Your training states that recovery should consume 80% of the cooling time. Some of our cooling times are almost 2 minutes, […]