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How to adjust the screw clearance of conical twin screw extruder?

Update:25-02-2019
Summary:

Conical twin screw extruder is the main equipment for p […]

Conical twin screw extruder is the main equipment for producing plastic profiles. When the profile is produced, the twin screw rotates outward in the barrel in different directions. The size of the screw gap not only affects the plasticizing effect of the material, but also affects the quality of the product, sometimes causing machine failure, and even leading to scrapping of heart parts such as barrels and screws. The screw clearance adjustment method starts with the process and strictly controls the quality of the process to ensure the quality of the whole machine.

How to adjust the screw clearance of conical twin screw extruder?

Adjusting the screw clearance of conical twin screw extruder:

Check the axial clearance of the screw on the special inspection tool to find the axial correspondence between the two screws. The main purpose of the pre-inspection: by checking the side clearance of the adjacent thread of each section in the inspection tool and adjusting it to make the minimum clearance consistent on both sides, that is, the twin screw is fixed one, the other is in the center position, measured and recorded The relative back-off amount is used as the basis for onboarding.

Specific method: Put the twin screw into the planed barrel, then install the double hole flange and the distance ring, and start to adjust the twin screw clearance.

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