This post is brought to you by Proportion Air.
Problem in Gas Assist Injection Molding
Gas assist injection molding is a commonly used process to make plastic parts today. It allows parts to be light weight and more sturdy than solidly molded parts. Plastic is injected into the mold followed by high pressure gas to force the plastic to the outside of the mold. The end product is a part that is hollow inside.
Several years ago a customer contacted Proportion Air for help in this molding process that he was perfecting. The customer wanted to proportionally control pressure by adjusting his command signal from his PLC (Programmable Logic Controller) to Proportion Air's electronic high pressure regulator. He needed pressure to be as repeatable as possible and he wanted to work up to 5,000 psig. The media used was nitrogen.
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