Plastic screen printing machine printing bad solution
Most of the patterns we see on plastic products are printed by plastic screen printing machines , but sometimes the screen printing machine can cause poor printing on plastic products when printing on plastic products. The following article
Most of the patterns we see on plastic products are printed by plastic screen printing machines, but sometimes the screen printing machine can cause poor printing on plastic products when printing on plastic products. The following article is Describes how to solve the poor surface of these plastic screen printing.
1, plastic screen printing machine printed product surface difficult to develop
Causes and Countermeasures:
(1) Exposure time is too long cause diffraction of light. Should be appropriate to shorten the exposure time.
(2) After the exposure is not timely development, so that part of the photosensitive film spontaneously hardened by light. Should be promptly exposed after exposure.
(3) the blackness of the background pattern is not enough, causing light transmission. Should increase the blackness of the floor.
(4) exposure, the bottom plate and the photosensitive film adhesion is too poor. Vacuum suction method should be used to make it close.
(5) bake temperature is too high or too long. Should be properly adjusted baking temperature and time.
(6) Photosensitive film thickness uneven. Should pay attention to smear evenly squeegee
2, plastic screen printing machine printing photosensitive film off
Causes and Countermeasures:
(1) photosensitive film is too thick, light hardening is not complete. Should pay due attention to squeegee thickness.
(2) Film drying is not sufficient. Should be properly adjusted baking temperature and time.
(3) Squeegee before the screen surface treatment is not net. Should pay attention to scraping before cleaning the screen mesh.
(4) Inadequate exposure. Should be appropriate to increase the exposure time.
5) Development time is too long and spray water pressure is too high. Should be appropriate to shorten the development time and reduce gun pressure
3, plastic screen printing machine printing screen layout pinhole
Causes and Countermeasures:
(1) the floor version of the dust. Should pay attention to the purification of the working environment.
(2) Sensitive emulsion contains impurities. Should be re-filtered emulsion.
(3) squeegee when the film bubble. Care should be taken to avoid creating glue bubbles.
(4) screen surface cleanliness is too poor. Should pay attention to the screen surface cleaning before scraping glue
4, plastic screen printing machine plate pattern unclear
Causes and Countermeasures:
(1) The bottom plate does not meet the plate-making requirements, its own pattern is unclear. Should be trimmed or replace the bottom plate.
(2) exposure time is too long, the pattern thinning hair virtual. Should be appropriate to shorten the exposure time, control exposure.
(3) Stretching angle or printing angle is not good, resulting in a jagged pattern. Stretching and drying should be properly adjusted perspective.
(4) the exposure of the bottom plate and sensitive film adhesion is poor. Should pay attention to close
5, plastic screen printing machine after printing poor ink product
Causes and Countermeasures:
(1) improper selection of ink. Should replace the ink
(2) ink drying too fast. Slow-drying ink should be used.
(3) ink viscosity is too high. Slower than the solvent should be used to reduce the viscosity.
(4) plate is blocked. Should clean the plate.
(5) lack of printing pressure. Should be appropriately increased.
(6) substrate surface treatment is not good. Pre-press treatment of substrates should be strengthened
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