Manufacturing method of low-emissivity coated laminated glass capable of removing film in peripheral area and being bent by drying

Abstract

The invention relates to a manufacturing method of low-emissivity coated laminated glass capable of removing a film in the peripheral area and being bent by fire drying. The manufacturing method comprises the following steps of firstly, pretreating a raw glass sheet: performing slicing, sheet loading, cutting, edging, washing and drying treatment on the raw glass sheet to obtain an automotive-grade raw glass sheet; secondly, coating a film: coating a low-emissivity film layer on the surface of the automotive-grade raw glass sheet by using magnetron sputtering coating equipment; thirdly, removing the film: using robot arms to control a laser for instantly evaporating a low-emissivity film layer material in an area which does not need coating, of the automotive-grade raw glass sheet; fourthly performing posttreatment: performing drying, powder spraying, pairing, fire drying-bending, laminating, and high-pressure and packaging treatment on the automotive-grade raw glass sheet to obtain the low-emissivity coated laminated glass capable of removing the film in the peripheral area and being bent by fire drying. Compared with the prior art, the manufacturing method disclosed by the invention has the advantages that the uniformity in coating is realized, an electromagnetic wave signal is enabled to pass through, a low-emissivity function is guaranteed, and a glass double-image is small in area; the manufacturing method is suitable for preparing coated glass in automobile windscreen and skylight laminated glass.

Description

technical field [0001] The invention relates to a method for manufacturing a coated laminated glass, in particular to a method for manufacturing a bakeable and bendable low-emissivity coated laminated glass in which the film is removed in the peripheral area. Background technique [0002] According to the manufacturing process of low-E coated glass, it can be divided into two types: online low-E coated glass and offline low-E coated glass. The invention belongs to the field of offline low-E coated glass. [0003] Off-line low-E coated glass is composed of multi-layer films, which are produced by magnetron sputtering coating technology. The functional layer is mainly silver layer. Since the silver layer is particularly easy to oxidize, ordinary off-line low-E coated glass For heating operation, it can only be used to synthesize insulating glass immediately after coating. [0004] With the continuous advancement of technology, toughened low-E coated glass has appeared in rece...

AI Technical Summary

Problems solved by technology

However, this process cannot achieve partial area film removal

[0012] Chinese patent 200820000985.8 discloses a film removal machine around the glass, which uses a grinding head to remove the film. This film removal device is semi-automatically operated and suitable for large-scale production, but this device is only suitable for linear and equidistant film removal, that is, film removal The vertical distance from the edge of the film layer to the periphery of the glass is equal; and the original glass for coating is rectangular, this device is especially suitable for the field of architectural glass coating

In practical application, the film removal speed of this film removal device is affected by the transmission speed and displacement accuracy of the three-axis numerical control guide rail, and the film removal efficiency is low. It can only realize partial area removal for the installation positions of ETC, GPS, RF and other devices on the glass film, it is difficult to achieve large-area film removal around automotive coated glass in industrialized mass production

Images