1. The machine does not movet move
Reasons: 1. The solenoid valve indicates that it is powered on. 2. The air pressure is too low. 3. The solenoid valve is damaged. 4. The trachea is blocked. 5. Mold closing guide wear. 6. The shaft sleeve is worn.
Troubleshooting methods: 1. Check the circuit. 2. Check the air path. 3. Replace the solenoid valve. 4. Check the trachea. 5. Correct parallelism. 6. Replace the shaft sleeve.
2. The machine temperature is out of control
Reasons: 1. The direction of the galvanic couple is reversed. 2. The thermocouple has poor contact. 3. The temperature controller is damaged.
Troubleshooting method: 1. Adjust the positive and negative directions. 2. Solid contact points. 3. Replace the temperature controller.
3. The voltage regulator is out of control
Reasons: 1. The power grid voltage is unstable. 2. The neutral line falls off. 3. The thyristor is damaged. 4. The temperature controller is damaged.
Troubleshooting methods: 1. Equipped with a regulated power supply. 2. Solid neutral line. 3. Replacement can be done by pressing silicon. 4. Replace the voltage regulator.
4. The time relay does not work
Reasons: 1. The voltage is too low. 2. The time relay is damaged.
Troubleshooting methods: 1. Increase the voltage. 2. Replace the time relay.
5. The transparency of the product is not good
Reasons: 1. The pre-molded parison is opaque. 2. The secondary heating temperature is too high. 3. The secondary heating time is too long. 4. The blow molding air contains moisture. 5. The surface of the blow mold is rough.
Troubleshooting methods: 1. Dry raw materials and use high-transparency parisons. 2. Reduce the oven temperature. 3. Shorten the heating time. 4. Use a freeze dryer to remove moisture. 5. Polish the mold surface.
6. Pearls appear on the product, the gloss turns white, and the bottom gate position is shifted.
Reasons: 1. The blowing temperature of the pre-molded parison is too low. 2. The bottle blowing time is advanced. 3. The temperature of the preform is uneven. 4. The stretching line speed is too low.
Troubleshooting methods: 1. Increase the secondary heating temperature and extend the secondary heating time. 2. Slow down the blowing time. 3. Change the oven temperature distribution. 4. Increase the drawing line speed.
7. The product cannot be formed
Reasons: 1. Insufficient blow molding air pressure. 2. Insufficient air flow for blow molding. 3. The blow molding air pressure rises too slowly. 4. The tensile force is too large. 5. The secondary heating speed is wrong.
Troubleshooting methods: 1. Increase air pressure. 2. Increase air flow. 3. Improve the pressure regulating structure and increase the air pressure rising speed. 4. Choose a reasonable tensile force when designing. 5. Adjust the temperature of the baking box.
8. The wall thickness of the product is uneven
Reasons: 1. The wall thickness of the parison is uneven. 2. The parison temperature is uneven. 3. The stretch separation rate is too low. 4. Tension rod offset
Troubleshooting methods: 1. Adjust the pre-molded parison. 2. Adjust the oven temperature distribution. 3. Increase the stretching ratio. 4. Adjust the stretching rod.
9. The product is thin in the middle
Reasons: 1. The stretch-blow temperature is too high. 2. The temperature in the middle of the parison is too high.
Troubleshooting methods: 1. Reduce the stretch-blow temperature. 2. Lower the heating temperature in the middle of the oven.
10. The upper part of the product is thin and the bottom is thick
Reasons: 1. The drawing and blowing line speed is too high. 2. Improper selection of blowing time. 3. The stretch-blow temperature is inappropriate.
Troubleshooting methods: 1. Reduce the stretch-blow temperature. 2. Advance the blowing time slightly. 3. Adjust the oven heating temperature to lower the temperature of the bottleneck and increase the temperature of the bottom.
11. The bottom of the product is thin and the top is thick
Reasons: 1. The drawing and blowing line speed is too low. 2. Improper selection of blowing time. 3. The stretch-blow temperature is inappropriate.
Troubleshooting methods: 1. Increase the stretch and blow speed. 2. Delay the blowing time. 3. Increase the temperature of the upper part of the oven and lower the temperature of the bottom.
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