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Common Faults and Troubleshooting Methods of Thermoforming Machine
2024-08-19
Thermoforming machinesare essential equipment in the packaging industry, used to create a wide range of products such as food containers, trays, and blister packs. However, like any machinery, thermoForming Machines are prone to faults that can disrupt production and affect product quality. In this blog, we will discuss some common faults that occur in thermoforming machines and their troubleshooting methods.
Ⅰ.Poorly Foming
1.The bottom sheet of the products is perforated
Reasons and solutions:
- Forming temperature is too high, try to lower the temperature.
- Sheet quality is not good, try to replace high-qulity Plastic Sheet.
2.The forming is incomplete
Reasons and solutions:
- Forming temperature is too low, try to turn up the temperature.
- The upper and lower molds are not parallel, try to adjust the column ball nut (including the lock nut), so that the upper and lower molds parallel to seal well.
- O-ring seal is damaged, try to replace the O-ring.
- The blow hole and exhaust hole are blocked, try to dredge the vent holes with a steel needle.
- Air pressure is not suitable, try to adjust the pressure reducing valve, generally (0.5-0.7MPa)
- The blowing time is wrong, try to adjust the position of blowing parameters (blow when the molding die is closed).
Ⅱ. Wrong punching position
1.Lead or lag
Reasons and solutions:
- The stroke is not adjusted correctly, try to measure the accuracy of each version of the stroke, such as the difference of the stroke can be adjusted.
- Wrong distance between forming and punching mold, try to rotate the forming moving handwheel in Figure 1 to adjust the distance between the forming die and the punching die.
2.Lateral deviation or unilateral tightness
Reasons and solutions:
- Improper track adjustment,try to readjust the track.
- Forming die cooling is poor, try to increase the cooling water flow.
- Quality of sheet is not good, and the expansion and contraction of both sides are inconsistent after heating,try to swap plastic sheet.