A continuous coating production system for sheet substrates

Abstract

The invention discloses a continuous coating production system for sheet-like substrates, which comprises a sequentially connected feeding area, a working area and a feeding area. Vacuum chamber, first transition chamber, coating deposition chamber, rapid atmosphere annealing chamber, several pre-vacuum chambers, unloading area including unloading table, each chamber in the working area has the required vacuum environment; also includes a transmission device capable of linear transmission ; The transmission device runs through the entire feeding area, working area and unloading area. This continuous coating system realizes continuous deposition and annealing of one or more layers of composite films including thermochromic coating materials in the same production line, which significantly improves production efficiency and reduces the need for materials to be offline after coating. Material loss cost during annealing. Due to its unique structural design can significantly improve the problem of tempering stress loss, the stress of the tempered glass-based smart glass produced by this system can meet the stress standard requirements of the national building energy-saving safety glass ≥ 90Mpa.

Description

technical field [0001] The invention relates to the field of production and preparation of thermochromic coating materials, in particular to a continuous coating production system for sheet substrates. Background technique [0002] Due to the pressure of energy shortage, countries all over the world are paying great attention to the field of building energy conservation, which accounts for one-third of the total energy consumption of the society, especially the energy conservation of building doors and windows has become the focus of attention. For this reason, LOW-E energy-saving door and window glass has been widely used, but the optical properties cannot be changed with people's will or environmental conditions, and its comfort and energy-saving effects have limitations. In contrast, thermochromic coating materials (especially thermochromic smart glass) have the function of controlling heat gain with changes in ambient temperature, and their energy-saving effect is more o...

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Problems solved by technology

Therefore, it is necessary to choose tempered glass with better temperature resistance as the substrate. However, the stress loss of tempered glass has already begun to appear in the temperature range of 400 ° C to 600 ° C, resulting in a decrease in safety performance. The longer the temperature condition is maintained, the greater the stress loss. , and eventually the strength of the prepared thermochromic smart glass cannot meet the relevant national or industry standards for use, so the development of relevant process routes and production equipment needs to consider this important issue

[0003] Chinese patent CN103204636A discloses a heating and cooling system for transparent conductive oxide-coated glass coating line. This equipment can be used for the process route of depositing thermochromatic coating materials at one time under high temperature conditions. However, the structure is complicated and inconvenient to maintain, and a resistive heating method is adopted. The efficiency is low. In order to maintain the temperature required for the deposited film, both the upper and lower surfaces of the glass are heated. The glass as a whole is in a high temperature state of 400°C to 600°C required for the deposition of thermochromic coating materials, which will inevitably lead to a decrease in the stress loss safety performance of the tempered glass base. , can not meet the relevant national or industry standards, such as GB15763.2-2005 safety glass for construction - tempered glass, GB17841-1999 tempered glass and semi-tempered glass for curtain walls, and GB18045-2000 safety glass for railway vehicles

In addition, the overall glass absorbs more heat and cools down slowly, which is not conducive to rapid cooling to improve the stress loss of tempered glass, and the heating and cooling processes consume a lot of energy.

Chinese patent CN101008074A provides an infrared heating device with a rotating reflector and a coating device that can realize substrate rotation and movement, but its complex structure is not conducive to the large-scale thermochromic smart glass in the equipment structure shown in the figure. Frequent movement on the platform, in addition, the heating system is located inside the vacuum chamber as a whole, the service life is seriously affected due to heat dissipation and other reasons, and the maintenance of the infrared radiation lamp is not convenient

Chinese patent CN2846440Y proposes a heater for a continuous coating device, and an insulating layer is set in the vacuum chamber. As a result, the treated substrate is heated by the non-primary surface layer of the film layer due to the secondary radiation of the environment, but the overall temperature of the substrate. If the annealing treatment applied to the glass-based thermochromic coating material will obviously affect the tempering stress loss, and at the same time, the cooling rate will decrease due to more glass absorption

In addition, the radiation tube is completely placed in the vacuum chamber, which seriously affects the service life due to heat dissipation and other reasons, and the maintenance of the infrared radiation tube is also inconvenient

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