Scraping blade for screen printing machine

Abstract

The invention relates to the technical field of printing machines, and discloses a scraping blade for a screen printing machine. The scraping blade comprises a scraping blade body, wherein an iron rodis installed inside the scraping blade body; an induction coil is connected on the iron rod in a winding mode; the end part of the induction coil extends to the outside of a sliding rod and is fixedly connected with a sliding rheostat positioned at the top of the sliding rod; and a power supply is connected between the induction coil and the sliding rheostat. According to the scraping blade, through the matching of the induction coil and the iron rod, the induction coil releases the magnetic field after being electrified, then the magnetic force is discharged outside through a guide plate, and meanwhile, the guide plate moves along the moving direction of the scraping blade, so that metal particles in ink are adsorbed onto the guide plate when the guide plate moves, and the scraping bladecarries a certain magnetic force to continuously adsorb solid particles in the ink; and therefore, the ink is kept clean, the viscosity of the ink is reduced, the smoothness of the ink during printing is improved, and the printing quality of materials is further improved.

Description

technical field [0001] The invention relates to the technical field of printing machines, in particular to a doctor blade for a screen printing machine. Background technique [0002] A screen printing machine is a machine that uses a screen printing plate to print. It belongs to a type of printing machine. A screen printing machine is a machine for printing text and images. It is a general term for machines or equipment used to produce printed matter. Screen printing machines It belongs to the more representative printing equipment in the stencil printing machine. In addition to silk, the material for making the screen can also be nylon wire, copper wire, steel wire or stainless steel wire. [0003] The working principle of the existing screen printing machine is as follows: image 3 As shown, pour the ink on the screen, and then start the equipment to drive the scraper to do reciprocating motion. After the ink on the screen is dispersed, place the material on the bottom of ...

AI Technical Summary

Problems solved by technology

[0003] The working principle of the existing screen printing machine is as follows: image 3 As shown, pour the ink on the screen, and then start the equipment to drive the scraper to do reciprocating motion. After the ink on the screen is dispersed, place the material on the bottom of the screen, and then start the equipment to drive the driving device to move downward. Then drive the squeegee to move down to touch the screen plate, and the driving device drives the squeegee to move back and forth to print the pattern on the material. After the printing is completed, the driving device drives the squeegee to move upward to take out the material. During use, the ink is affected by the process and contains a small amount of pigment solid particles inside. In addition, the screen is mostly made of steel or stainless steel. After a period of use, the bottom of the scraper will rub against the surface of the screen to produce some solid metal particles. With the movement of the scraper, the particles are directly printed on the material, causing unevenness on the surface of the material, and then passing through the roller, some of the particles are directly pressed into the interior of the material by the roller (the hardness of the roller is greater than that of the particle), causing the material to The surface is damaged, and another part of the particles adheres to the roller, which further affects the subsequent processing of the material. At the same time, the existence of particles will also affect the continuity of the ink during printing. When the doctor blade scrapes off, part of the ink is directly blocked by the particles, and Larger particles will directly block the mesh of the screen, resulting in the inability of the ink to penetrate into the material, resulting in a decrease in the integrity of the pattern, resulting in incomplete surface patterns after pattern printing, and unclear positions partially blocked by particles, affecting the quality of printing At the same time, in the winter environment, affected by the climate, coupled with the fact that the ink is directly exposed to the air, the fluidity of the ink is affected by the temperature and becomes poor, resulting in an increase in the consistency and viscosity of the ink. When removing, the ink cannot be evenly dispersed, causing part of the ink to be printed on the material, the color is too bright and incompatible with other positions, and the printing quality is reduced. When the viscosity increases, the ink is adsorbed on the material, resulting in a change in the viscosity between the material and the screen. Large, part of the material is moving out of the screen, adhered by the ink, cracks, burrs, broken wires and other phenomena appear on the surface, which further reduces the printing quality and affects the use of materials

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