Position locking device for air knife of strip casting machine

Abstract

The invention discloses a position locking device for air knife of a strip casting machine. A support plate of a lifting locking mechanism is fixed on the front end surface of a bottom plate, the screw hole in the support plate is opposite to the taper hole of a pressing plate arranged on the support plate, the input shaft of an elevator is inserted into the small elastic taper sleeves in the screw hole and the taper hole, a locking pin shaft goes through a through hole arranged on the pressing plate, and a locking nut and a locking handle are arranged on the locking pin shaft. The locking handle is rotated to drive the nut to press the pressing plate to move towards to a deep groove, the small elastic taper sleeves tightly lock the input shaft of the elevator, and thus an air knife is locked in the vertical direction. A rotation locking mechanism pressing seat is fixed on a decelerator, a long shaft, which drives the air knife to rotate, is inserted into a large elastic taper sleeve arranged in the center hole of the pressing seat, a rotation locking pin shaft goes through the through hole in the pressing seat, and the rotation locking pin shaft is provided with a rotation locking nut and a rotation locking handle. The rotation locking handle is rotated to drive the rotation locking nut to press the pressing seat to move towards to the deep groove, the small elastic taper sleeves tightly lock the long shaft, and the air knife is locked in the rotation direction. The position locking device can make sure that the air knife position is firm and stable, has a simple structure, and can be used in a strip casting machine.

Description

technical field [0001] The invention relates to the structure of a casting machine for plastic film production, in particular to a locking device for the position of the air knife of the casting machine. Background technique [0002] The casting machine for plastic film stretching is equipped with an air knife behind the quench roll. After the raw material is extruded from the die head, under the action of the cold air flow of the air knife blowing nozzle, it is quickly attached to the surface of the quenching roll to form a thick sheet. [0003] In order to ensure the quality of thick sheet forming, the air knife is required to be parallel to the die lip and keep a certain distance from the surface of the quenching roller. At present, the air knife on the support is adjusted to allow the air knife to rise and fall in the vertical direction, and to rotate axially, so that the relative position between the air knife blowing nozzle and the surface of the quenching roller and ...

AI Technical Summary

Problems solved by technology

However, the existing air knife vertical lifting adjustment mechanism and axial rotation adjustment mechanism do not have a special locking mechanism. When manual misoperation occurs, the position of the air knife will be changed.

The long-term vibration of the frame when the casting machine is working can also easily cause the air knife to move in the vertical direction or rotate in the axial direction, so that the air knife blowing nozzle deviates from the best process position between the surface of the quenching roller and the die lip, which affects Mass of plastic slabs

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