1. Glass screen printing machine can be said that all glass processing can not be separated from glass screen printing machine if it is to be screen printed. If divided into the following, it can be divided into: automotive glass screen printing machine, engineering glass screen printing machine, furniture glass screen printing machine, home appliance glass screen printing machine and advertising glass screen printing machine.
2, pattern or line hair
The screen printing machine has too many silk screen printing, and the screen stencil is loosened; the distance between the loose screen and the substrate changes; the angle between the squeegee and the substrate is not correct, or the force is uneven; the consistency of the printing material is too thin or too dry; The substrate surface of the reworked workpiece is cleaned and the screen is dried after the solvent is applied.
3, line distortion
The printing material is too thin, and the printing force is too strong; the printing material is unevenly adjusted (the solvent in the printing material is unevenly dispersed); the solvent or the cleaning agent on the net mold is not dried, or the surface is cleaned when the workpiece is reworked. The agent is not dry or dirty; after the first scratching, the printing net sealing force is too large, so that a small amount of printing material is extruded into the mesh; the speed of the moving (moving) of the printing plate in the printing is too large within the effective area of the printing substrate. , pause or repeat printing, etc.; the fineness of the printed material does not match the selected mesh number.
4, there is pitting printing material is too sticky, and has impurities, plugging holes; or the printing material is too sticky, insufficient printing power;
The surface of the substrate is not clean and oily; the printing material is too sticky, the dirt on the net mold is not removed, the particles of the printing material are large, the mesh of the high mesh is not passed; the drying speed of the silk screen is too fast, the screen printing workplace is exhausted; The printing material failed to seal the net in time to produce a netting; the unevenness of the printing was uneven, or large or small; the surface of the substrate was uneven.
5, pattern line edge burrs, notches, cams, etc.
When the printing material is prepared, the maturity period is not enough. The residual bubbles in the printing material are not running clean. The air bubbles are stained on the substrate after the silk screen printing. The surface of the printing substrate is not clean, the dust is affected, the printing force is improper, the light is uneven or the printing is performed. The force is insufficient; the printed matter on the substrate is not dry, and the storage place is caused by dust; under the proper conditions of printing, the distance between the screen and the substrate is too large; the pre-press screen cleaning is not complete.
When we encounter these problems, we should carefully analyze the reasons for the quality of the screen printing machine screen printing products according to the above points, and solve the problems caused by the reasons. As for the quality problems caused by non-scratch printing operations, such as the problem of stretching nets, most The problem of good distance, the problem of silk screen stencil making, the surface treatment of the workpiece and the matching of printing materials will affect the quality of silk screen printing. These are the places we should pay attention to.