Screen stretching device for screen printer

Abstract

The invention discloses a screen stretching device for a screen printer, which comprises a working platform and a stretching screen fixed on the working platform, wherein a silk screen, both ends of which are fixed to a frame through splints, abuts against the stretching screen; and an elevating mechanism is installed below the working platform. The screen stretching device is reasonable in design and solves the problem of the matching between the silk screen and the stretching screen, so that the tensile force acted by the stretching screen on the edge of the metal screen is uniform, thereby satisfying the higher accuracy requirement and higher automation requirement for the screen stretching operation.

Description

technical field [0001] The invention belongs to the technical field of printing machinery, and in particular relates to a screen stretching device of a screen printing machine. Background technique [0002] Screen printing belongs to stencil printing among the four major printing techniques (letterpress printing, gravure printing, offset printing, and stencil printing). The mesh of the graphic part of the screen printing can pass through the ink and leak to the substrate, while the rest of the printing plate is blocked and cannot pass through the ink, forming a blank on the substrate. Screen printing is to weave real silk, synthetic fiber silk or metal wire into a net, stretch it tightly on the screen frame, and make a screen by manual film engraving or photochemical plate making, leaving only the graphic part on the screen The ink can pass through, but the mesh of the non-graphic part is all blocked, and the ink cannot pass through. [0003] The main characteristics of sc...

AI Technical Summary

Problems solved by technology

The operation of the combination of screw and hand wheel depends on the hand feeling of the worker, and the tension of the stretching net cannot be quantitatively controlled, that is, the state of the stretching net cannot be adjusted.

In addition, the traditional metal mesh stretching machine does not have the function of measurement. After stretching the mesh, it is necessary to manually judge the state of the stretching mesh, which is mainly determined by experience.

Generally speaking, when stretching the screen, stretch the screen and press the screen with your fingers at the same time, and feel that the screen has a certain elasticity. The degree of automation is not enough, the efficiency is not high, and it consumes manpower and material resources.

In addition, if problems are found after stretching the net, adjustments need to be made, which can only be done manually, and the whole process is time-consuming and labor-intensive

Images