Universal locking chuck device for bidirectional film stretching machine

Abstract

The invention discloses a universal locking chuck device for a bidirectional film stretching machine. The universal locking chuck device comprises a clip support and a clip body, wherein a through hole is formed in one end of the clip support; a column body penetrates through the through hole; a lower clamp plate is arranged at the upper end of the column body, and a positioning plate is arranged at the lower end thereof; a spring is sleeved outside the column body, the upper end of the spring abuts against the lower clamp plate, and the lower end thereof abuts against the clip support; an upper clamp plate is arranged above the lower clamp plate; a film clamp port is formed between the upper clamp plate and the lower clamp plate; the lower end of the clip body is connected with the upper clamp plate through a four-bar linkage; a spring support is arranged at the other end of the clip support; and a tension spring or a pressure spring is arranged between the spring support and the clip body. According to the device, the clip body controls the upper clamp plate to close from outside to inside through the four-bar linkage, thereby preventing film crowding; and simultaneously, the lower clamp plate moves up relatively under the function of the spring along with the change of the film from thick to thin, therefore automatic real-time locking of the clamp port is achieved, and the film is prevented from falling off in the whole stretching process.

Description

technical field [0001] The invention relates to a universal locking chuck device of a film bidirectional stretching machine. Background technique [0002] Films have been widely used in many fields and are indispensable products in human life. In the manufacturing process, after the film is extruded, the thickness of the film is too thick to meet the requirements of use. It must be stretched longitudinally and transversely. The purpose is to reduce the thickness of the film and ensure its lightness. The film must be clamped during the stretching process. , so the clip is a key component of the film biaxial stretching machine. [0003] At present, when the clips used in the biaxial stretching machine are closed, the movement direction of the upper jaw is from the inside to the outside, which is easy to cluster the film; Thin, easy to release the film. Contents of the invention [0004] Based on the above technical problems, the present invention provides a universal lock...

AI Technical Summary

Problems solved by technology

[0003] At present, when the clips used in the biaxial stretching machine are closed, the movement direction of the upper jaw is from the inside to the outside, which is easy to cluster the film; thin, easy to release

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