PT INDONESIA BENXING NEW MATERIAL
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PT INDONESIA BENXING NEW MATERIAL
| No. | Abnormal phenomena | Analysis | |
| 1 | Crystal dots, impurities, black spots | Raw Materials | Poor compatibility between processing aids and PVC resin |
| The water content of PVC resin and additives is too high | |||
| The compounding agent contains foreign objects | |||
| The polymerization degree of PVC resin is too high | |||
| Poor dispersion of pigments | |||
| Equipments | Foreign objects falling from above of the extruder, opening mill,or rolling roller | ||
| Mixer adhesive decomposed materials | |||
| The abrasion of converyor belt causes debris mixing into the materials | |||
| Insufficient cooling of the pulverizer causes agglomeration of recycled materials | |||
| Poor sealing equipment in the factory building, air with foreign objects infiltrating into the materials | |||
| Lump material falling into the mixer barrel, discharge port, or air supply pipeline | |||
| The extruder and end ring contain decomposed materials | |||
| Striker plate adhesive decomposed materials | |||
| Artificial | Peel off the decomposed material from the extruder head at any time | ||
| Operators use cotton gloves to flip materials | |||
| The rolling roller surface is not clean | |||
| Excessive recycled material | |||
| Unclean recycled material | |||
| Inadvertently pouring impurities or foreign objects into the ingredients | |||
| Agglomeration of leftover materials | |||
| Operation Conditions | Poor plasticization of extruder discharge | ||
| Excessive material accumulation in the opening mill | |||
| Mixer mixing sequence error | |||
| Insufficient processing temperature of rolling roller | |||
| Excessive material accumulation between rolling rolls 1st and 2nd | |||
| The set temperature of the mixer is too low (poor mixing effect) | |||
| 2 | Water ripple | Formula | Insufficient dosage of processing aids |
| Excessive dosage of lubricant | |||
| Formula sheet filling error | |||
| Operation Conditions | The temperature difference between the last set of rolling rollers is too large | ||
| The speed ratio between the rolling roller and the export roller is too small | |||
| The speed ratio of the last set of rolling rollers is too large | |||
| Excessive refractive index of light on the surface of adhesive tape | |||
| Insufficient material between the last set of rolling rollers | |||
| Poor material flowability between the last set of rolling rollers | |||
| 3 | Adhesive mark | Formula | Different formulas |
| Equipments | Sundries falling into the fan cover | ||
| Artificial | The surface of the stripping roller is not clean | ||
| The last set of roller surfaces is not clean | |||
| Operation Conditions | The temperature of the rolling roller is too high | ||
| Excessive plasticization of extruder discharge | |||
| The speed ratios of each roller are too close | |||
| Uneven rolling and pressing of the opening mill | |||
| 4 | Sweat | Raw Materials | The polymerization degree of PVC resin is large difference |
| Improper formula | |||
| Equipments | Insufficient measurement | ||
| The condensation oil from the fan cover drips onto the roller surface | |||
| The thermocouple of the mixing machine is damaged, and the temperature cannot be automatically controlled | |||
| Artificial | Incorrect mixing and feeding sequence | ||
| Unclean roller surface | |||
| Operation Conditions | Temperature is too high | ||
| Roller speed ratio too close | |||
| Mixing temperature too high | |||
| 5 | Fascicular groove | Formula | Excessive dosage of plasticizer |
| Sheet material too soft | |||
| Equipments | Abnormal mechanical motor of auxiliary equipment | ||
| The tension of the coiler is unstable | |||
| The indicated values of the thermometer and speedometer do not match the actual values | |||
| Operation Conditions | Improper adjustment of gear train speed | ||
| Improper adjustment of gear train temperature | |||
| Improper adjustment of brake wheel speed and rubber wheel speed | |||
| 6 | Scratch | Equipments | Guide wheel abrasion (some machines do not have this equipment) |
| Roughness and scars on the wheel surface of the attached debris equipment | |||
| The tension of the coiler is unstable | |||
| Cooling wheel set trips | |||
| Clamping roller trips | |||
| Artificial | Speed not synchronized after stripping the roller | ||
| Excessive coiling tension | |||
| 7 | Insufficient haze (GV value) | One side gloss,one side haze | The rolling roller increases speed but the processing temperature does not rise or fall with it |
| Fine or coarse aggregate between the last two rollers | |||
| The speed ratio of the last two rollers is too large or too small | |||
| Poor or excessive plasticization of the opening mill | |||
| Roller temperature too low or too high | |||
| Insufficient double-sided gloss | Poor plasticization of the opening mill | ||
| The rolling roller increases speed but the processing temperature does not rise or fall with it | |||
| The gap between the last two rollers is too small | |||
| Roller temperature too low | |||
| Insufficient double-sided haze | Excessive gelation in the opening mill | ||
| The set temperature of the roller is too high | |||
| Coarse aggregate between the last two rollers | |||
| The speed ratio of the last two rollers is too small | |||
| The rolling roller slows down but the processing temperature does not decrease with it | |||
| 8 | Poor heating shrinkage | Equipments | Incorrect speedometer indication |
| Incorrect indication of speed ratio calculator | |||
| Unstable speed of each wheel | |||
| Operation Conditions | Excessive stretching of the pulling wheel | ||
| Excessive stretching of the export wheel | |||
| Excessive brake wheel clearance | |||
| Improper temperature setting of the extension wheel | |||
| Excessive tension of the coiler | |||
| The linear speed of each wheel after the gear train (including) is too high than the speed of the exported wheel | |||
| 9 | Chromatism | Raw Materials | Different color concentration |
| Equipments | Incorrect measurement | ||
| Temperature malfunction | |||
| Artificial | Using residual materials of different colors | ||
| Improper coordination of rolling distance, temperature, and discharge speed | |||
| Color matching error | |||
| Excessive material accumulation or excessive gelation in the rolling mill | |||
| Improper material accumulation between rolling rolls 1st and 2nd | |||
| Others | Different haze levels | ||
| Incomplete cleaning | |||
| Different thicknesses | |||
