Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Short answer: No, we do not need a specific "nylon screw" to injection mold nylon. Standard "General Purpose" (GP) screws can handle nylon quite well. However, because nylon behaves differently than other plastics when it melts, using a screw specifically designed for it can significantly improve your part quality and cycle times.

Why Nylon is Tricky

Nylon is a semi-crystalline material with a very sharp melting point. Unlike amorphous plastics (like ABS) that soften gradually, nylon stays solid until it hits its melting temperature, at which point it turns into a very low-viscosity "watery" liquid almost instantly.

Standard vs. Nylon-Specific Screws

If you are running high volumes or dealing with tight tolerances, here is how the hardware differs:

Pro-Tips for Success

If you are using a standard screw for nylon, keep these three things in mind:

1.Dryness is Everything: Nylon is extremely hygroscopic (it drinks water from the air). Even with the perfect screw, if the resin isn't dried to less than 0.2% moisture, your parts will have splay and structural weak spots.

2.Compression Ratio: Look for a screw with a compression ratio between 3:1 and 4:1. This ensures the material is packed tightly enough to remove air before it reaches the nozzle.

3.Temperature Control: Because nylon is "runny," you may need a shut-off nozzle to prevent "drool" (material leaking out of the nozzle between cycles).