Clamping device for intermittently feeding films

Abstract

The invention discloses a clamping device for intermittently feeding films. The clamping device comprises a supporting base, a driving component, a fixed clamping piece and a movable clamping piece; the fixed clamping piece is fixedly arranged on the driving component; the movable clamping piece is movably arranged on the driving component; the structure of the fixed clamping piece is similar to that of the movable clamping piece; and each of the fixed clamping piece and the movable clamping piece comprises a base, a single driving cylinder, a horizontal supporting plate, an upper clamping plate, a lower clamping plate and a pair of linear bearings, the single driving cylinder is arranged along a vertical direction, the horizontal supporting plate is fixedly connected with a piston of the driving cylinder, the upper clamping plate is connected with the supporting plate through a pair of vertical guide shafts, the upper clamping plate and the supporting plate jointly form a frame structure, the lower clamping plate is positioned between the upper clamping plate and the supporting plate, and the linear bearings are respectively used for accommodating and installing the vertical guide shafts and are fixed at two ends of the lower clamping plate. By the clamping device for intermittently feeding films, the phenomenon of jamming or uneven pressure caused by double-cylinder drive can be avoided, damage of elements such as the cylinders is avoided by the linear bearings and corresponding structures, feeding accuracy and clamping stability are improved, and accordingly the films can be ensured to be accurately clamped and conveyed.

Description

technical field [0001] The invention belongs to the technical field of material conveying, and more specifically relates to a clamping device capable of intermittently feeding flexible films such as plastic films, metal films, and paper. Background technique [0002] Flexible film conveying technology is an important part of the complete production process of printing, packaging, textile, semiconductor packaging and emerging flexible electronics industries, and it is the link that connects and supports the normal operation of other processes in the entire production line. [0003] Flexible films may be paper, plastic (such as PET), leather or metal (such as aluminum foil), and may be constructed in rolls or laminated sheets. Subsequent process steps mainly perform operations such as etching, printing, embroidery, and pasting on the flexible film, and the flexible film needs to be unfolded or transported to the corresponding device or mechanism one by one. At present, there ...

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Problems solved by technology

However, in many practices, we have found that this clamping device has the following defects: (1) Due to the way that the double cylinders are placed at both ends of the clamping plate, the drive mode of the double cylinders is not conducive to the synchronization of the two cylinders. The performance requirements are high, and it is very easy to get stuck. In addition, the flow of the two cylinders is not synchronized and it is easy to cause uneven pressure; (2) The cylinders are in the form of pairs with self-guiding slides. During the up-and-down reciprocating movement of the pressing plate, it is difficult to guarantee the movement accuracy of the cylinder, and the cylinder itself is easily damaged due to the force perpendicular to its driving direction; (3) The clamping components of the clamping device need to be set in two left and right The vertical plate serves as the structural support and also bears the installation foundation of the double cylinders. In this case, the structure of the overall device is relatively complicated, and it is difficult to realize the mobile positioning of the clamping parts in the vertical direction, and the height consistency between the left and right vertical plates There are high requirements; (4) Since the driving mode and stroke of the cylinder directly affect the gap between the upper and lower pressure plates, it is difficult to achieve pressure uniformity between the upper and lower pressure plates in the absence of detection means, and the mechanical installation and debugging are quite troublesome ; (5) In the case of using the synchronous belt as the driving element, there is a gap between the teeth of the synchronous belt, the return error is large, and it is difficult to obtain a more precise feed action control; (6) A pair of synchronous belts used together It is difficult to adjust the linear guide rail to the ideal parallel state, and the operation is prone to change in resistance, and the stability of the clamping force is difficult to guarantee

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