A multi-purpose air-expanding chuck and its working method

Abstract

A multi-purpose pneumatic collet is characterized in that it includes a power shaft, a cylinder, a top cone and a small shaft expansion piece; one end of the power shaft is connected to a power source, and the other end is fixedly connected to the cylinder jacket; the cylinder is placed in the cylinder Inside the jacket, one end of the cylinder is fixedly connected to the cylinder jacket, and the other end is connected to the top cone; the cone surface of the top cone is fitted with several small shaft expansion pieces. Working method: the air cylinder is deflated, the top cone exits the hollow belt between the small shaft expansion sheets, and the shaft diameter composed of the small shaft expansion sheets is reduced; according to the needs, select and assemble the shaft expansion sheets of the corresponding size, and set the core shaft of the web on the On the shaft formed by the shaft expanders; the cylinder is inflated, the top cone is close to the hollow belt between the small shaft expanders, the diameter of the shaft composed of the small shaft expanders is enlarged, and the shaft expanders support the mandrel of the roll paper, so that the roll The paper is fixed; the power shaft drives the clamped roll paper to move. The invention can adapt to roll paper mandrels of various sizes, and the expansion sleeves of different roll cores can be switched conveniently, with high efficiency; the tensioning force is stable and reliable.

Description

(1) Technical fields: [0001] The invention is applicable to the field of printing equipment, in particular to printing equipment using roll paper as processing material, and is a multi-purpose air-expanding chuck and its working method. (2) Background technology: [0002] The air-expanding collet is a clamping tool used to fix the roll material, and it is widely used in the unwinding and winding device of the roll material. [0003] Due to the different types and qualities of roll materials, the diameters of the mandrels are also different. Depending on the material of the reel to be processed, the rewinding or unwinding device needs to be replaced with an air-expanding chuck adapted to different diameters to clamp the reel paper with different diameters of the mandrel. Generally, the air-expanding chuck is connected to the motor, and many parts need to be disassembled and assembled. The replacement is time-consuming and laborious, which affects work efficiency. [0004] I...

AI Technical Summary

Problems solved by technology

Generally, the inflatable chuck is connected to the motor, and many parts need to be disassembled. The replacement is time-consuming and laborious, which affects work efficiency.

[0004] In order to solve this problem, some suppliers of air-expanding collets have introduced double-diameter mechanical collets, which are shaped like stepped shafts. This kind of mechanical collets can indeed be adapted to clamp rolls of two core shaft sizes, but If there are more than two types of replacement, it is obviously not applicable

Moreover, the double-diameter mechanical chucks are arranged in a row due to different shaft diameters. This structural mode occupies a wider format. When changing the web, it is necessary to adjust the web, so the difference between the webs with different shaft diameters It is not convenient to switch

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