Paying-off device of plastic extruding machine

Abstract

The invention provides a paying-off device of a plastic extruding machine, belonging to the technical field of the plastic extruding machine. One end of a thimble shaft (3) of the paying-off device of the plastic extruding machine is connected with a screw rod (4) which extends out of a thimble shaft sleeve (2); one end of the screw rod (4) extending out of the thimble shaft sleeve (2) is provided with a hand wheel (5) which is used for controlling the rotation of the screw rod (4); the thimble shaft sleeve (2) is arranged into a structure which can only move axially; positioning pins (15) which can prevent the thimble shaft sleeve (2) from moving along a base (1) of the paying-off device are arranged on the thimble shaft sleeve (2); the other end of the thimble shaft (3) is movably connected with a thimble head base (6); and the thimble head base (6) is connected with a detachable combined thimble head (7). According to the technical scheme adopted by the invention, the thimble shaft and the thimble shaft sleeve are simple in machining and high in assembling accuracy, and the stability of high-speed operation of the paying-off device is ensured; bearings are used for supporting in the paying-off device, thus the easiness and convenience in stroke adjustment operation are ensured; and the stroke adjustment in a larger range can be realized.

Description

technical field [0001] The invention belongs to the technical field of extruders, and more specifically relates to an extruder pay-off device. Background technique [0002] The pay-off device of the extruder adopts a shaftless thimble structure. In order to meet the needs of loading reels with different width specifications, the movable thimble head of the shaftless thimble pay-off device must have a certain axial adjustable stroke range. At present, the shaftless thimble type pay-off device mostly adopts the form of screw mandrel sleeve, gear rack, curved groove, etc. to realize the thimble stroke adjustment function. Among them, the pay-off device in the form of a screw thread sleeve and a rack and pinion is adopted. The screw rod, the rack and the thimble shaft are of an integrated structure, that is, a thread or rack of a certain shape is processed on the thimble shaft, and it is connected with the thimble sleeve. Cooperate with the thread sleeve on the top or the fixed...

AI Technical Summary

Problems solved by technology

The parts of these two structures are relatively complicated in processing, and the assembly accuracy is not high; the pay-off device in the form of a curved groove is to process a curved groove of a certain shape on the thimble sleeve, and the guide positioning fixed on the thimble shaft The action of the pin realizes the reciprocating movement of the thimble shaft and completes the adjustment of the stroke

This kind of structure is more laborious in operation, and the stroke can be adjusted in a small range

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