Hot melt cutting. Or a laser.
Cutting of fine glass tubes and rods. When cutting the thin glass tube and rod with a diameter of 5mm-10mm or less, it must first be placed flat on the edge of the table, and the edge of the triangular file, grinding wheel blade (or the newly broken porcelain bowl piece) is pressed vertically at the place where the glass tube is to be cut off, pushed forward forcefully, so that the file mark reaches 1/3 or 1/4 of the circumference of the tube, pick up the glass tube (rod), and the thumbs of the hands are against the back of the file mark. The other refers to holding down the glass tube (rod), and the two hands are slightly forced to pull back at the same time.
Cutting of coarse glass tubes. The first will be cut off with a file to file a circle of fine marks, with resistance wire around the fine marks, resistance wire cross with heat-resistant insulation material separated (or leave 1mm-2mm small gap), resistance wire can be taken from 150W electric furnace wire one of the sections, heating straightening. The resistance wire can be adjusted to a very low voltage power supply by a voltage regulator or a low voltage power supply. Wait until the resistance wire is red hot for about one minute. Put a drop of cold water on the trace, and power off at the same time, and the glass tube will break along the trace.
The opening of the glass tube after disconnection is very sharp and easy to scratch the surface, so the glass should be treated after disconnection. The first method is that it can be put on the alcohol lamp to burn smooth; Second, it can be smoothed on a fine abrasive cloth or a grinding stone.
Related concept
slice
Cutting is a physical action. The narrow sense of cutting refers to the use of knives and other sharp objects (such as food, wood and other objects with low hardness) to cut; Generalized cutting refers to the use of tools, such as machine tools, flames, etc., to disconnect the object under pressure or high temperature. In mathematics, there is also a "cutting line", which is a straight line that can divide a plane into several parts. Cutting plays an important role in people's production and life.
glass
Glass is an amorphous inorganic nonmetallic material, which is generally made of a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as the main raw materials, and a small amount of auxiliary raw materials are added. Its main components are silica and other oxides. The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O·CaO·6SiO2, etc. The main component is silicate double salt, which is an amorphous solid with an irregular structure. Widely used in buildings, used to isolate the wind and light, belongs to the mixture. Another mixed with some metal oxides or salts to show the color of colored glass, and through the physical or chemical method of toughened glass and so on.
Glass tube
Glass tube is a kind of non-metallic tube, which is a kind of glass with sodium oxide (Na2O), boron oxide (B2O2) and silicon dioxide (SIO2) as the basic components. Its good performance has been widely recognized by all walks of life in the world, compared with the general glass, harmless side effects, its mechanical properties, thermal stability, water resistance, alkali resistance, acid resistance and other properties are greatly improved, can be widely used in chemical industry, aerospace, military, family, hospital and other fields, with good promotion value and social benefits. The appearance of this kind of glass in our country is another new revolution in the basic material industry.