A coup to reduce the scrap rate of treadmill printing machine screen
What is the probability of scrapping the screen version of the treadmill printing machine? Let's listen to the analysis by Xiangyu editor: First, after the printing is finished, the color paste pattern should be cleaned immediately, and the unclean areas should be sprayed with a spray gun to prevent conjunctiva and cause network clogging. Second, the emulsified paste can generally be used as a thickening agent, and the dosage should be just right, not too much. Too much dosage will affect the rheology, and at the same time, it is easy to cause blockage. Third, the choice of adhesive. Binder is one of the main components of paint color paste. The fastness of the paint printing pattern and whether the screen is blocked depends on the quality of the adhesive. It should be selected with good thixotropy, strong adhesion, high color yield, slow film formation, good filterability, convenient operation, and baking. Adhesive that does not turn yellow after drying and has a soft hand feeling. Fourth, the particle size of the coating has a great influence on the plug net, and some coatings have a coarser particle size and should not be used. Fifth, the surface finish of the printed fabric is required to be good, and the singeing is required to be above level 3 to reduce the short hair on the fabric and prevent the network from being blocked. Sixth, the squeegee should have good elasticity and clean color, so that the paint color paste has a strong penetrating ability and prevents the network from clogging. Pay attention to the flatness of the blade edge and the curvature of the blade surface. If the blade edge is not flat and the blade surface is curved, the elasticity of the blade is inconsistent, which will cause the inner wall of the cylinder to be unclean and cause net jamming. Seventh, the paint color paste is easy to condense at high temperature. Pay attention to the temperature changes in the workshop. In the high temperature season, you can add glycerin or urea to the color paste. The color paste should be filtered before it is put on the machine. The number of meshes of the nylon mesh should be more than round. The mesh of the net is twice as large. Eighth, the choice of crosslinking agent. The cross-linking agent can cross-link the linear structure of the adhesive into a network structure and form a film on the fabric. Generally, it is required that the pigment printing paste does not increase the viscosity, which is beneficial to not block the net. Ninth, the rubber guide belt should be kept flat and clean. If there is dry slurry condensation, the surface is uneven, the elasticity is reduced, and the uneven pressure of the scraper will cause blockage. The reverse side of the guide belt and the support shaft of the guide belt should be cleaned with organic solvents frequently. Tenth, Urea is a hydrophilic substance with moisture absorption and solubilizing effects. Adding a proper amount of urea to the paint printing pattern color paste can solve the skinning problem of the adhesive, improve the rheological properties of the color paste, and help the scraper to smoothly print and prevent network clogging.