injection molding troubleshooting manual
Especially the Foreign particle (burnt material or other) embedded in the part, Particles on the tool surface, contaminated material or foreign debris in the barrel, or too much shear heat burning the material prior to injection, Directionally "off tone" wavy lines or patterns, Injection speeds too slow (the plastic has cooled down too much during injection, injection speeds should be set as fast as is appropriate for the process and material used). When you stop the production, to clean up the shot cylinder, screw the most forward position. Plastic rapid changes in flow direction. Electric heats nozzle and note muzzle. will meet the quality requirements of injection molded parts.
Be very careful of the heated portion, the heater band at the nozzle is often exposed, so look out for it. Mold cooling pipes imbalances so as to bring to injection molded parts of uneven cooling rates. 2. Due to the lack of room cleaning or plastic dry cause plastic blended with burnt particles. The sprue bushing is not aligned with the nozzle. Plastic flow in the mold of uneven air trapped in it. Pigment not evenly covered with the plastic particles.
Injection speed set too high. With elevated temperature or correct nozzle improved hot runner injection nozzle.
The hot runner mold aggregates tube completely remove and clean.
3. Contamination. Covers 24 problems such as brittleness, orange skin, sinking & warpage. 1. 5. cylinder, screw, valve adapter maybe curing inside the aggregate hot Inaccurate temperature controller, control was mixed. can purchase separate chapters directly from the table of contents 6. parts each time the pressure rises, until the injection molded parts
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