1. Causes of the noise
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Impurities or iron particles get inside the puller barrel.
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The problem stems from the raw materials.
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The clearance between the screw shaft and the puller barrel is not up to standard due to geometric or installation errors.
2. Points to check and address
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Balance: Check and remeasure the balance of the machine body.
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Barrel play: Check if the barrel is tilting downwards due to improper installation.
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Cooling system: Ensure the cooling system nuts are tightened securely.
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Concentricity of the coupling: Check the concentricity of the coupling, ensuring it does not exceed the permissible standard.
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Drying time: Ensure a minimum cold start resistance time of 30 minutes when heating the puller barrel.
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Guide rails: Check the straightness and proper installation of the guide rails.
3. Technical adjustment process
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Using a feeler gauge: Use a 0.02 mm feeler gauge to check the narrowest points between the outer diameter of the screw shaft and the inner hole of the puller barrel (at 8 points on the support).
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Adjusting the rear support: * If the gap at the two lower left corners is small: Loosen the corresponding screws and adjust to press down or lift up.
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The typical adjustment range is between 1.0 mm and 1.5 mm .
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Concentricity measurement: Use a center gauge to remeasure the concentricity of the frame and the puller barrel; the inherent error should be within 0.30 mm .
4. Post-adjustment check
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After making adjustments, conduct a test run of the system and spray at a slow speed.
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Ensure the machine runs smoothly and there are no unusual noises coming from the screw assembly.
If users encounter any difficulties during the process, they can contact Haitian Vietnam’s technical hotline for direct support.