Automatic synchronization net puller and net pulling method

Abstract

The invention discloses a self-synchronizing net stretching machine and a stretching method thereof. The net stretching machine comprises a frame, horizontal and vertical line screw mandrel shifting devices arranged around the frame and net stretching collets arranged on the horizontal and vertical line screw mandrel shifting devices, wherein, the frame is provided with a synchronous motor group which controls the synchronous relative inward or outward shift of the horizontal and vertical opposite line screw mandrel shifting devices. While stretching the net, screw mandrel shifting devices atsymmetrical sides of the horizontal line or the vertical line are controlled by the synchronous motor group to shift synchronously in succession for pre-stretching, then the mesh cloth is vertically fixed and firmly clamped, and synchronous net stretching from both symmetrical sides is carried out. The method has the advantages that net stretching can be carried out synchronously from symmetricalsides, thus ensuring that the force the mesh bears is balanced; besides, the horizontal lines and vertical lines are ensured to be vertical to each other during the process of synchronous net stretching, thereby largely improving the accuracy of net stretching; moreover, four sides of the mesh cloth can be ensured not to be wasted while stretching, thus improving the utility ratio of the mesh cloth.

Description

technical field [0001] The invention relates to a net stretching method for screen printing, in particular to an automatic synchronous net stretching machine and a net stretching method thereof. Background technique [0002] In the field of screen printing, the quality of the screen directly affects the printing quality. Existing stretching machines for stretching mesh cloth generally include a frame, a screw displacement mechanism and a stretching chuck. The movements between the displacement mechanisms are independent of each other, and they all move longitudinally along the length direction to pull the net. In this way, it is easy to make the mesh stretch unevenly during the stretching process, and cause the warp and weft of the mesh to not be perpendicular to each other. , so that a large part of the stretched mesh is unqualified; and the four corners of the mesh will be deformed by uneven force such as tension and relaxation of the adjacent screw displacement mechanism...

AI Technical Summary

Problems solved by technology

Existing stretching machines for stretching mesh cloth generally include a frame, a screw displacement mechanism and a stretching chuck. The movements between the displacement mechanisms are independent of each other, and they are all moved longitudinally along the length direction to pull the net. In this way, it is easy to make the mesh stretch unevenly during the stretching process, and cause the warp and weft of the mesh to not be perpendicular to each other. , so that a large part of the stretched mesh is unqualified; and the four corners of the mesh will be deformed by uneven force such as tension and relaxation of the adjacent screw displacement mechanism when pulling the mesh, so that the four corners cannot be discarded. Use, resulting in the waste of mesh, therefore, how to effectively pull the mesh, improve the accuracy of the mesh and reduce the cost has always been a concern of people

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