Screen printing method with tag adhering in mould

Abstract

A screen printing method involving in-mold labeling injection molding, which adopts the following steps: (A) in automatic screen printing, use a screen to print patterns, colors and positioning holes on a sheet, and produce printed The semi-finished product, (B) utilizes the digital control punching machine to punch out the positioning hole, (C) undergoes pressing and punching processing, and injection molding; the step A includes the following steps: (A1) utilizing an automatic screen printing machine to carry out For the first screen printing, use ink and thinner to print the printing pattern together with the positioning holes and screen alignment holes on the sheet, bake, and (A2) the screen used is positioned through the screen alignment holes , use ink and diluent to carry out the second color printing, baking, (A3) the screen used is positioned through the screen alignment hole, use ink and diluent to carry out the last background color printing, baking, the present invention High reliability, high yield rate, easy operation.

Description

Technical field [0001] The invention relates to printing, in particular to a screen printing method for in-mold labeling and injection molding. Background technique [0002] In the existing IML (In Mold Label) printing process, positioning holes are first printed on the sheet, and the positioning holes are punched after drying. A fixture with positioning pins is used to finish printing. Set the positioning hole on the sheet, and then use the positioning pin to position the screen to print on the sheet. The semi-finished product after printing is produced through pattern printing, color printing, and background printing. In this method, the positioning hole plays a role in printing The function of positioning, but the screen plate is not very accurate in clamping. For example, when a sixteen screen plate is out, the first one is aligned, and the last one may be off. Moreover, there will be vibrations during the printing process. Often there are deviations, and the reliability is p...

AI Technical Summary

Problems solved by technology

[0002] In the existing In Mold Label (IML: In Mold Label) printing process, the positioning holes are first printed on the sheet, and the positioning holes are punched out after drying. The sheet with the positioning hole is put on, and then the screen plate is positioned to print on the sheet through the positioning pin, and the printed semi-finished product is produced through pattern printing, color printing, and background printing. In this method, the positioning hole plays a role in printing. The role of positioning, but the screen is not very accurate in clamping. For example, if a sixteen screen is produced, the first one is aligned, and the last one may be off. What's more, there will be vibrations during the printing process. Misalignment often occurs and the reliability is poor

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