subject: Pcb Screen Printing Stencil Production Process Description [print this page] 1, Pop Pop steps: Network box Clear - the level of calibration - rubber coated bottom - Pop - measuring tension - Coated Viscose - the net, Edge - Storage
Job description Box reuse due to network, network box is surrounded by remnants of the glue, Gauze Such debris must be cleaned, so as not to affect the mesh and the screen frame of adhesion
The network box placed on the platform (required level) to check whether the deformation of network box, which need to be leveling any deformation processing
Will be cleared, undeformed mesh network frame and then coated uniform surface layer of Pu but the right of the South Po-fat (without adding curing agent) to enhance the drawing in the net mesh with the screen frame after the adhesion
Adhesive to be the first time about 10 minutes later, the screen frame placed on the netting platform, and adjust the relative position and height of
Chosen mesh, release the clip around the mouth, the mesh tile in the box, and then the folder into the folder uniform mesh mouth, not a wrinkle, pay attention to the four corners to have a more loose than gauze, mouth clip must be locking clip and the clip can not be a gap between the (auto-l frame, manually net for example)
Pop: 26 of the first tension, tension stand for 5 minutes to 24; second time tension 28, stand for 5 minutes tension 26; third time tension 32, stand for 5 minutes and 30 tension; fourth correction 5 point of tension 32, 20 minutes after standing on the rubber tension 30; 15 minutes for glue curing the net tension of 28, standing for 72 hours before they can make web version (to 1 m 1 meters automatic production line using the screen as an example).
1, pulled back 3 vertical, vertical pulled back
2, lateral pull back four, transverse pull back
Horizontal and vertical synchronization opened, the required tension has been pulled when the gluing, common network mesh tension (100T, 110T, 120T were 30 2 N) (77T, 51T were 35 2 N) (24T to 50 2 N)
Will have tuned Glue Brush evenly with a small brush in the screen frame and then the surface mesh sides, not to glue down the middle of network access version, 8 minutes to be dried glue can be used Scraper Plastic surfaces in the glue will not completely fit the local pressure close to contract about 10 minutes, the glue dry thoroughly (should be open hair to enhance drying) before the net
Remove excess mesh around the screen, and screen border state, date, when the net mesh and tension (in order to observe the tension changes) in order to prevent the infiltration of anti-White, angles in the network box with red glue sealed, then sealed with waterproof tape and gauze in the screen frame and then the surface side, the same medicine to prevent the infiltration of
2, net drying Washing net: network with grinding paste to the grease (new web), ghost paste to the graphics (the old network), in addition to net pulp pulp powder, blue oil,
With anti-white washed debris, wash with detergent net, final rinse with high pressure water gun, the final wash with pure water.
Grill net - set the oven temperature should be less than 48 degrees C.
Premium film: the web clean pure water then washed once. Engineering graphics chip fight film by about 20% greater selection of water film, water film with a triangular end ruler to suppress the Internet, with a triangular foot then slowly up evenness, and then Squeegee Calibrating knife soft reduction, towel dry excess water
Use the net pulp: re-sizing drying stencil, use shaving box, paste the box installed blown-line network, in which green oil three times (about once every 10 minutes or more) base oil, face oil is twice Blue plastic film first tear film of water on the 50K, to a network of 20 pulp, scraping every three (we have used automatic sizing machine), sizing after drying.
Mesh selection of general lines, green oil, base oil, face oil with the 120T, 100T, 110T mesh, carbon oil 51T, 24T sensitive blue plastic lines and thermal curing green oil with a 77T
Film's use of water lines with a 18K film (not net pulp slurry by using network access will have as uneven: Dog, Fei You, wave), green oil, base oil, face oil use network slurry, carbon-fuel use 50K water film
Film with the necessary engineering drawings posted on the web board selected location, placed on exposing machine for exposing time of use (3000W spotlight), the line usually 60-80 seconds, the green oil in 80-100 seconds, the bottom character 40-60 seconds, oil, carbon oil, blue plastic 350-400 seconds
Pressurized water will mesh, and dry.
With blue oil (close up plasma) outside the network edge seal graphic film, and dry.
Inspection, repair network, write the date of completion and the corresponding number and record archiving and storage.
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Pcb Screen Printing Stencil Production Process Description
