| Product defects | Possible reason | Handling methods |
| Finished a mold deformation | Cooling time is too short, the finished product failed to cool enough | Extended cooling time |
| Open mold speed too fast, strong pull deformation | Slows mold opening speed | |
| Finished product is defective | Modify the mold | |
| Mold temperature is too high, finished cooling is not in place | Lower the mold temperature | |
| Surface marks | Speed too fast, the mold cavity can not be instantaneous discharge of air | Reduce the rate of fire, so that the mold cavity of the air smoothly |
| The raw material contains moisture | Bake material | |
| Molding temperature is too high, the raw material by high temperature decomposition | Lower the molding temperature | |
| There is air in the tube | Reduce the temperature of the pipe after the end of paragraph, increase the pressure | |
| Burr | Pressure is too large, parting force is greater than the clamping force, forced open mold | Reduce the pressure, increase clamping force |
| Injection pressure and pressure is too high | Reduce the injection pressure and pressure | |
| Speed is too fast, the material temperature is too high | Reduce the rate of fire and material temperature | |
| Mold vent plug | Clean the mold | |
| Insufficient filling | Insufficient injection pressure, firing rate is too slow | Improve the injection pressure, firing rate |
| Molding temperature is too low, the flow channel is too small | Improve the molding temperature, modify the flow channel | |
| The air inside the mold cavity can not be completely discharged | Increase the exhaust hole | |
| Injection time is too short and the injection volume is insufficient | Increase the injection time to increase the amount of injection | |
| Combined line | Insufficient injection pressure, too slow fire rate, gate and runner is too small | Improve the injection rate and the rate of fire, modify the gate and runner |
| Molding temperature and mold temperature is too low | Increase the temperature, increase the back pressure or speed up the screw speed | |
| Insufficient exhaust in the confluence and no overflow pool | Additional confluence of the Ministry of additional vent holes and overflow pool | |
| Use excessive release agent | Reduce the use of release agents | |
| Finished gloss is poor | Firing rate is too slow, lack of injection pressure, mold temperature is too low | Improve the rate of fire, injection pressure, mold temperature |
| Mold cavity with water or grease pollution | Wipe clean | |
| Mold surface grinding is not good or gate and runner is too small | Modify the mold | |
| Insufficient injection or moisture in raw material | Increase the injection pressure, firing rate, to extend the injection time or bake material | |
| Rhyolite | Injection pressure is too high or too low, too fast or too slow rate of fire | Adjust the appropriate injection pressure and rate of fire |
| Holding time too short or gate too small | Increase the holding time or increase the gate | |
| Mold temperature and gate temperature is too low | Increase the temperature | |
| Material melting poor | Increase the temperature, increase the back pressure or speed up the screw speed | |
| Finished a mold rupture | The material temperature is too low or the mold temperature is too low | Increase the temperature |
| Stripping is not enough or improper ejection way | Modify the mold | |
| The gate is too small | Modify the mold | |
| Release angle is insufficient | Modify the mold | |
| Extrusion finished surface roughness | Molding temperature is too low | Improve the temperature and improve the screw speed |
| The mold temperature is too low | Increase the mold temperature | |
| Extruded surface of a block | Tube is not clean, there are debris | Cleaning material pipe |
| Additives such as masterbatch carrier is not required | Find the corresponding color masterbatch | |
| Extrusion volume is not enough | Tube temperature is not enough | Increase the temperature |
| Mold mouth with debris or screw speed is too low | Clean the die or increase screw speed | |
| Extrusion out of the finished product expansion | Die temperature is too low or screw speed too fast | Increase the die temperature, reduce the screw speed |
| Limit the material too fast | Adjust the limiting device | |
| Extrusion produces a lot of gas | Melt temperature is too high | Lower the melt temperature |
| There are debris in the material pipe | Cleaning material pipe | |
| Extrusion finished with pits | The raw material contains moisture | Bake material |
| Melt temperature is too high, the screw speed too fast | Lower melt temperature and screw speed |
