1. Equipment

As the home heating management program has run out of management, the barrel is overheated and decomposed and blackened because of the flaws from the attach or the barrel, the molten substance is caught and accrued, and it is decomposed after long-term repaired warming. . ​ plastic injection moulding     ，Examine the rubberized brain system for put on metallic overseas physical objects.

2. Form

The fungus is not exhausted smoothly, you can easily burn off, or the dimensions of the gating technique is not big enough, as well as the shearing is simply too robust to cause coking there exists inappropriate lubricating oil inside the mildew, as well as the fungus is demolded.

3. Plastic

An excessive amount of plastic material volatiles, an excessive amount of moisture, excessive harmful particles, excessive recycled material, and an excessive amount of pollution.

4. Handling

When the stress is simply too higher, the rate is simply too high, the back stress is too substantial, along with the rate is way too quick, the temperatures of your materials will likely be decomposed.

The barrel needs to be cleaned out regularly to remove preservatives which can be less tolerant than plastic-type.