Plastic Classification & Injection Molding: How to Precisely Tune the Machine Based on Material Properties?

When it comes to plastic classification, some people only know soft plastics, hard plastics, and transparent plastics. How molten plastic flows and shrinks in the mold under high pressure has a lot to do with its own molecular structure and physical properties. To quickly and effectively tune out qualified products, you must first understand the material's characteristics. Nowadays, various modified materials and alloy materials are increasingly common. Let's skip textbook theory and use plain, straightforward language to discuss the categories of injection molding materials and tuning essentials.

    I. Classification by Crystallinity: Crystalline vs. Amorphous

Veterans will always check whether the material is "amorphous plastic" or "crystalline plastic" before tuning. This is the litmus test of professional tuning.

    II. Classification by Performance & Application

III. Summary & Exchange

Each material has its own different "temperament." You must fully understand their temperament to tune the parameters well. The parameters on the control panel are just numbers, but the several-hundred-degree melt flowing in the mold cavity is "alive." You need to know clearly in your head at what temperature it flows smoothly and at what temperature it shrinks completely.

What material is currently being run in your workshop? Is it an "obedient material" that lets you leave work worry-free every day, or an "industrial waste modified material" that keeps you working overtime all night with constant bubbles, shrinkage, and cracking? Welcome to exchange and discuss!