In the screw production process, if it is a self-tapping screw, the tail is naturally completed during the thread forming process.
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Then if the drill tail screw, especially the very classic drill tail hexagonal head screw. In the process of production, the tail needs to be made independently.
This requires the use of a screw clamp tail machine. It can use molds to make the tail of the screw the shape you need. Such as type-17 tail screw and drill tail screw and spoon tail screw.
The drill tail of the screw is very important, because there is no reserved screw hole in the working environment of the drill tail screw, and the tail of the screw needs to break through the material. Especially the tail of the drill tail hex screw is very important. The length and stiffness of the tail determine how thick material you can fasten.
Because the drill tail of the screw will be responsible for breaking through the material during the work, but the thread does not have this function. Therefore, when fastening the product, it is necessary to select the tail length of the screw according to the thickness of the material. Generally speaking, the tail of the screw is slightly longer than the thickness of the material to be fastened.
I. The materials to be used when the coating machine is working:
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(1) basic materials are wood lines, MDF, wood plastic, plastic steel, PVC and aluminum profiles and so on, with lines of materials. The basic material requirements usually use the rules of linear material, can allow grooves and surfaces, but the longitudinal direction of each point it must be straight, but also have a certain ability to withstand.
(2) overlaying materials are usually made of PVC decorative film, decorative paper, solid wood skin, Boeing plate and composite aluminum film and so on. Width should be determined according to the needs of the substrate and the selected model, usually below fifty cm.
Two, coating machine usually can be divided into cold glue and hot glue these two types.
(1) the liquid glue is usually used in cold glue coating machine. Because liquid glue can be divided into solvent glue and water glue, and the methods of coating are scraping coating and roller coating, these two kinds. It is easy to volatilize solvent glue. It needs to be scraped and coated. The rubber box is more convenient and airtight. It can avoid the volatilization of coating glue. But the water glue and the volatile smaller solvent rubber usually uses the roller coating method, this method is easy to operate.
(2) the hot glue coating machine usually adopts the solid glue, which is heated and dissolved in the hot box of the coating machine. After using it, the temperature of the coating is usually about two hundred and twenty degrees centigrade. Easy to attach to solid wood skin and decorative paint paper.
(3) combined type coating machine is to meet the needs of many different production, universal cladding machine has cold glue, hot glue combination and cold glue, scraping, coating roll, coating type, etc..
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