To continue on a previous post regarding machine maintenance, I will answer the second question… Tim What is the best method of measuring platen squareness? My Response The most common method is to use a set of inside micrometers to measure the distance between the platens. Before you do this, you should first remove the mold, clean […]
Category Archives
Plastics Technology
Machine Leveling Procedures…
This morning, I received a three part question regarding machine maintenance. The first question will be addressed here… Tim I am now working at a plant where all the machines are all over ten years old and have not been well maintained. What is the best procedure for machine leveling? My Response The most common method is to place a […]
Blueprint Reading Skills…
I received a comment regarding a commonly overlooked skill the other day… HT Our company has it’s own system of part drawings so I do not believe general blueprint training applies to what we do. My Comments Good technical training teaches not only the specifics, but the fundamental information necessary for true understanding. In the situation above, having a good understanding of concepts […]
Preheating the Polymer…
A customer asked me this question the other day… KL We are using a screw specifically designed for our grade of PP, we have performed the tact temperature study, and have optimized both injection and packing. All these have helped, yet our cycle time is still limited by the screw recovery time, do you have any suggestions? My Response Once the process and screw […]
Dynamic vs. Static Cavity Balancing…
After answering some follow-up questions from the last post, I decided to clarify the difference between Dynamic cavity balancing and Static cavity balancing with repsect to either injeciton molding or injection-blow molding. Dynamic Cavity Balancing When the mold cavity is filling, the polymer flow front is considered dynamic, or in motion. The balance of two or more mold cavities […]