Detailed explanation of mosaics processing techniq

Hot melt glass mosaic processing techniques detailed explanation

hot melt glass is also called hot melt stereo sound-absorbing glass, which is to heat the glass to the molten state through the hot melt furnace (the heating temperature is generally 750 ℃), so that the glass can form natural or required shapes and three-dimensional patterns. It has sound-absorbing effect, dazzling, elegant style, and gives people a hazy feeling and imagination through the combination of color and technology, Its precious artistic value is unmatched by other similar products. It is used in families and large entertainment places. It is combined with high-end decorative materials to make the finishing point for decoration projects

heating temperature

as the melting point temperature of the glass produced by each glass manufacturer is different, the glass of the same manufacturer should be used as much as possible when processing hot-melt glass. If the glass of other manufacturers is used, the temperature curve should be adjusted

temperature curve

temperature curve is the temperature change process of annealing and cooling after glass is heated to molten state. The hot melting furnace with temperature curve can adjust the whole hot melting process on the computer without manual control. Because there is no temperature curve in the simple hot-melt furnace, the temperature needs to be controlled manually

annealing

the cooling process of glass after hot melt molding, that is, annealing. If the annealing is not good, the glass will burst in the furnace or cold burst after hot melting. The reason is that the annealing is not complete, which changes the gravity of the glass. Glass is most likely to burst when annealed to about 300 ℃, so when annealed at about 300 ℃, the temperature should be segmented: Rise - Fall - rise again for annealing. For the hot melting furnace with temperature curve, annealing can be carried out according to the set temperature curve. For the hot melting furnace without temperature curve, special care should be taken when manually controlling the temperature annealing

hot melt mold

the mold used for hot melt glass processing generally adopts high-temperature resistant materials without thermal expansion changes, such as insulation cotton, insulation board, etc., or materials that have little difference with the glass expansion coefficient, such as quartz sand, cast iron, stainless steel cotton, etc

coefficient of thermal expansion

refers to the shrinkage of an object during heating and cooling. The expansion coefficient of molds used for hot-melt glass is almost the same as that of glass, otherwise, the glass import market will continue to decline; Weak and stable operation of domestic ore market; The billet market price is weak and downward; The coke market operates safely; The weak decline of the shipping market may burst or be difficult to demould

the glass includes the profile instrument of EU 27 countries

which is used to detect the front and back of the glass. As the high-temperature glass belt floats on the molten tin surface when the float glass is formed, a certain amount of tin is infiltrated into the lower surface of the glass. This tin infiltrating mask has many special properties, which has a significant impact on the further processing of glass. The silk printing should be on the non tin side, otherwise the color will deviate. The coating should also be on the non tin surface. When bending and tempering, the tin surface should be on the convex surface, otherwise it is easy to produce rainbow. When producing hot-melt glass, if the tin surface is reversed, the transparency of the produced hot-melt glass

laminated glass

is a kind of hot-melt glass. It is a decorative glass with many wavy glass strips, which are naturally bonded together after heating in the hot-melt furnace. There is no need for a mold to process the laminated glass. The processing steps are as follows:

1. Use the same batch of glass produced by the same manufacturer (this is very important. As mentioned earlier, the melting point temperature of the glass produced by different manufacturers is different. In the hot melting process, it is very easy to burst because of its different thermal expansion coefficient.) One side is cut into a straight face, one side into a wavy shape, or both sides into a wavy shape. The specific operation depends on the needs and requirements

2. Stick the cut glass strips with shadowless glue or 502 glue. There is no need to apply glue in a large area, as long as you can stick the glass strips together. If the processed laminated glass is not large, it can be glued first and then put into the hot melt furnace. If the glass is relatively large, it can be directly glued or separated in the hot melt furnace and then glued in the hot melt furnace. Shenzhen is located in the hinterland of the Pearl 3 corner of the world factory

3. Entering the hot melting furnace

the internal reason for the self explosion of glass is that nickel sulfide impurities are mixed in the glass manufacturing process. Nickel sulfide has two kinds of crystals, which are at high temperature α Phase, at low temperature β Phase. During annealing, if the temperature drops too fast, α It's too late to turn into β Phase, the glass will explode

the transformation speed of nickel sulfide has a great relationship with temperature. When the temperature is 280 ℃, the transformation time is only 1 hour, while when the temperature is 250 ℃, it takes 100 hours, so temperature control is very important. Some glasses have not been transformed after several hours, which is equivalent to no effect

under the internal economic cycle, 2. Ensure that the lever swings flexibly and the friction force is small. In April, 021, China Chengdu Construction Expo talked with you about new opportunities in the industry

in 2020, with the outbreak of the global epidemic and the prevention and control of the domestic epidemic effectively controlled, the global economic pattern has also undergone great changes, and China is moving forward under the strong strategic deployment of national policies [details]