Concept
glazed glass is a colorful and easy-melt glaze that is applied to the glass surface, heated to the glaze, so that the glaze layer is firmly combined with the glass, annealed or Tempered treatment. It has good chemical stability and decorative, suitable for exterior wall finishes.
Production of Glass Glaze
The production of glazed glass includes a production, glaze, drying, heating, starting or annealing, cooling.
Production
The production of glass glaze has two basic materials composition, glaze and pigment, and the base glaze is a powder developed by the easy-melt glass, and the pigment is inorganic colored substance. It can be an inorganic compound, or several inorganic compounds, which are ground, mixed, and sintered, and then abrasive into powders at a certain ratio ratio.
(1) The function of the glaze
is to disperse the inorganic pigment height and melt in the surface of the glass substrate at a lower temperature, and the substrate is dissolved into one Overall; When the glaze melts, the colorless pigment with strong coloration is dyed into color glass, and the glass is bonded to the glass substrate into a whole and has become a colorful glazed glass.
The process performance requirements of the glaze: the melting temperature is low, which can be melted before the glass substrate is softened; there is good chemical stability and gloss, and the inorganic pigment does not produce chemical effects, neither The color of the inorganic pigment itself changes; the expansion coefficient is very close to the expansion coefficient of the glass substrate, and when the temperature varies, the glaze does not produce cracks and burning.
(2) Pigment
pigment, it is a metal oxide or compound, or several metal oxides or compounds, according to each metal, mix, mix, Sintering, washing, filtration, drying, re-grinding into fine powder.
The color of the various colors, the selected metal oxide, mitigation, and the sintering temperature and sintering time are different from the pigmentation.
The dispersion of the pigment is closely related to the size of its particles, the smaller the particles, the larger the dispersion (the particles are generally less than 5цm).
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(1) Spraying method
Tuning the lancer slurry or the color glaze powder into a certain concentration of slurry, which causes the magnetic lap fluid and the compressed air, and the slurry atomizes in the spray gun. Become a particulate should be sprayed into the glass surface at a certain speed, divided into: artificial spraying method and mechanical continuous spraying method.
(2) Screen curtain method
The curtain is to use gravity to flow the viscous glaze from the glass substrate to the upper surface of the substrate, the glass substrate from The lancel pulp under the curtain flow is passed, i.e., coating a thin layer of glazed pulp.
The curtain method is composed of a roller conveyor, a slit funnel, a recovery tank, a lancer mixer and a slurry tank.
The width of the slit canal depends on the thickness of the glaze layer, the conveying speed of the glass substrate, and the viscosity of the glaze pulp.
(3) roller coating method
roller coating method is the principle of transplanted roller printing technology, and the viscous glaze is applied to the surface of the glass substrate using the rubber roller. .
(4) Screen printing method
This method is the migrating screen printing technology and modern textile technology, using screen printing machine, glazed pulp, coating on glass substrates One or more glaze.
Mage is made of synthetic fibers or stainless steel wires.
(5) Cover Law
This method uses a seal with elastic soft materials into a scene pattern, with this seal, a layer of glazed, then printed in clean Glass substrate.
(6) Painting method
artificial drawing (small production scale, low efficiency)
(7) Reposted paper method
is Extension and expansion of screen printing method. It is the first to print the complex scene patterns of the variety of colors in a piece of paper. When using water, it is bonded to a clean glass substrate, and then heat it.
Dry
After glaze, it is necessary to carry the glaze layer after drying, the drying process can be used according to the glaze process and production scale, natural drying, room type electric heat drying and continuous Electrothermal drying.
Heating and cooling
glazed glass isometric and cooling according to its production method, the process and equipment selected:
Temperature The process is to move the glazed drying glass sheet into the tempered heating furnace to 670 to 715 ° C, and then quickly move into the shack.
Semi-steel method This method of this method is to move the glazed drying glass sheet to the heating furnace to be heated to a certain temperature and then move into the cooling chamber. Cooling.
Heating Annealing method It is placed in a continuous roller heating in a continuous roller heating, and is prepared, heated, annealed, and cooled into a glazed glass. The maximum temperature in the kiln is 670 ~ 715 ° C, and then annealed and cooled at a certain temperature system.
Performance
1. Mechanical properties
2. Enhance the aesthetic effect Color rich
characteristics
pattern exquisite , Do not fade, do not fall, easy to clean, good stability and decorative, can be made according to user requirements or art design pattern.
Application
The facial facade layer, the general building hall and the stair layers and building outgoing surfaces; the building needs to be shade and the spacer wall, Screen and other building components; glazed glass partition wall oven door, tip, countertops and advanced furniture for matching parts; glazed glass frame lampshade, mesh, hood and other lighting accessories; glazed glass lamp cover car glass edge, etc. .
Color
is often used as the inorganic pigment of glass printing with the following:
red - cadmium sulfide; yellow-chromate, cadmium sulfide, Uranium salt;
green-chromium oxide; blue-aluminate;
brown-iron oxide; white-calcium oxide, kaolin, etc.
Black-oxide, manganese oxide and other mixtures;