The common faults and causes of the extrusion blow molding machine screw and barrel during use are shown in the table.
Kingplas, The best extrusion blow molding machine manufacturer in China
Analysis of common faults and causes during the use of screw and barrel of hollow blow molding machine
No. Fault phenomenon Causes and measures
1 There is a scraping sound during operation 1. The center line of the barrel is bent to adjust the center height of the barrel
2. The barrel and the screw are not the same, check the position and position accuracy error of the relevant parts
3. The inner wall of the machine or the outer diameter of the screw is not accurate enough, check and replace
4. Screw distortion, check and replace
2 Local overheating near the connection between the barrel and the gear box 1. The barrel and the screw are not concentric, check the position and position accuracy error of the relevant parts
2. Local deformation of the screw, check and replace
3 Screw feeding is unstable or not feeding 1. The barrel inlet is not well cooled, check the maintenance cooling waterway
2. The screw feed port is blocked by blockage, check and clear the blockage and block.
3. The barrel feeding section is not slotted or worn seriously, check and replace the barrel
4. Screw feed section is damaged, repaired or replaced
4 During the operation, the temperature rise of the screw metering section is too high. 1. The temperature control or cooling fan is not good. Check the temperature control and cooling fan.
2. The barrel screw is seriously worn, repaired or replaced
3. The head resistance is too large, check and repair
4. Screw structure design is not good, modify the design
5 The machine screw wears too fast and the extrusion volume decreases. 1. Excessive impurities in the raw materials reduce impurities.
2. The barrel screw heat treatment hardness is not enough, check the material or heat treatment process