1. General project inspection
The general items in the nameplate quality requirements can be inspected by visual inspection, dimensional measurement, and comparison with samples, and each sample is picked.
2. Film reliability test
(1) Tear-off inspection: The plastic film layer on the film proof sheet is peeled and peeled off by hand to see if the printing ink layer and paper fiber are attached to the film layer in a large area. If there is, the process is normal. Test one per order.
(2) Water immersion test: After immersing the proof sheet in normal temperature water for about 1 hour, the film layer and the printed sheet do not separate, indicating that the film layer is firmly attached. Test one every month.
3.Nameplate paste performance test
(1) Temperature rise test in actual use
Put the machine in the actual use state, wait for the temperature of the machine to rise, and check the attached nameplate after 15 minutes (or reach thermal equilibrium). The nameplate should be well pasted and free from warping, curling or other defects. Use your fingers to push the nameplate normally and firmly, and the displacement cannot be more than 1mm. Pick samples for each.
(2) Freezing inspection
Put the surface of the machine with the nameplate in an environment of -5 ~ 0 ℃ for 30 minutes. The film layer and the printed sheet will not separate. The nameplate and the machine surface will not separate. One test every quarter, it is generally recommended to send back to the company for testing.
(3) Water immersion inspection
This test is only for water series products and products whose surface is easily exposed to water during work. The surface of the machine with the nameplate immersed in normal temperature water for 30 minutes, the film layer and the printed sheet do not separate, the nameplate does not separate from the surface of the machine, there is no warping, and the curling phenomenon indicates that the paste is firm. Test one per order.