Self-examination and troubleshooting of plastic scorching problems

When plastic filament extrusion machines fail in daily use, but many users cannot cope with the failure or even do not know the cause of the failure. Below we explain two types of failures that often occur in extruders:

1. The phenomenon of scorch

(1) The temperature reflects excessively high, or the temperature control instrument fails, causing the plastic to be extremely high temperature and scorching.

(2) The wire outlet of the machine head has big smoke, strong irritating smell, and crackling sound.

(3) Particulate scorch appears on the surface.

(4) There are continuous pores at the joint.

2. The cause of scorch

(1) Super high temperature control causes plastic scorch.

(2) The screw is used for a long time without cleaning, and the scorched material accumulates and is extruded with the plastic.

(3) The heating time is too long, and the plastic deposits will be heated for a long time, which will make the plastic aging and deteriorate and scorch.

(4) The parking time is too long, and the machine head and screw are not cleaned, causing plastic decomposition and scorching.

(5) Multiple mold changes or color changes, causing plastic decomposition and scorching.

(6) The gland of the machine head is not pressed tightly, and the plastic decomposes inside.

(7) The temperature control instrument fails, causing scorch after ultra-high temperature.