Shenzhen Alu Rapid Prototype Precision Co., Ltd.

According to the manufacturing standards used by rapid prototyping specialists like Shenzhen Alu Rapid Prototype Precision Co., Ltd, the temperature of "injection mold plastic" depends on whether you are talking about the melt temperature (the liquid plastic) or the mold temperature (the tool itself).

In our precision facility, we work with a wide range of engineering-grade resins. Here is the breakdown of the heat involved:

1. Melt Temperature (The Liquid Plastic)

Before the plastic is injected, it is heated in a barrel until it reaches afluid state. For the materials commonly used by Shenzhen Alu, thesetemperatures typically range from 180°C to 300°C (356°F to 572°F).

2. Mold Temperature (The Steel or Aluminum Tool)

The mold itself is also heated (or cooled) to a specific temperature to ensure the plastic flows correctly and doesn't "freeze" too quickly.

     Standard Plastics: Molds are usually kept between 40°C and 80°C.

     Engineering Plastics: For materials like Polycarbonate (PC), the mold might be heated to 120°C to prevent internal stress and warping.

Why Temperature Precision Matters

Shenzhen Alu Rapid Prototype emphasizes precision because even a 5°C variance can cause significant defects:

     Too Hot: The plastic may degrade (burn), or the part may take too long to cool, causing "sink marks" or "flash" (excess plastic leaking out).

     Too Cold: The plastic might solidify before it reaches the end of the mold, resulting in a "short shot" (an incomplete part) or visible "knit lines."