Industry Information

How are woven silicone hoses made?

  The first step in the production process of the braided silicone tube is to extrude the inner tube. Usually, when extruding the inner tube, we require the customer to make the wall thickness between 1 and 2mm as much as possible. The reason: if the inner tube wall thickness is too thin, it will cause Without support, the soft fabric will easily fall off when weaving the fiber thread, resulting in the failure of weaving. Those who have special requirements can customize the inner tube can be made of high temperature resistance, color, flame retardant, etc., for use in special fields, such as the inner tube is black, the outer tube is transparent, the inner tube is made of high temperature resistant glue, and the outer tube is ordinary and highly transparent Glue is all available, which shows that the production process of the inner tube of the braided silicone tube can meet the needs of various industries.
  After extruding the inner tube, it is necessary to braid the fiber wire. The conventional braided silicone tube can withstand more than 12-38 kg of pressure, but some customized customers do not need to withstand pressure. They usually need to withstand negative pressure or ultra-high pressure. When the fiber line cannot meet the customer's requirements, we usually use high-strength braids such as nylon fishing lines. After replacing the braids, the product's resistance to compression or negative pressure can be strengthened. It should be noted that steel wire silicone tubes cannot be braided. . Pull the inner tube through the braiding machine through the braided net composed of several braided heads. At this time, the braided net will wrap the inner tube (the braided head will be programmed to weave according to a fixed route, so the silicone wire you see Weaving is done regularly rather than randomly) All conventional braided silicone tubes must be carried out with a braiding machine, so this link is the most important link in all processes. And the selected braid needs to be resistant to high temperature because the silicone vulcanization process is carried out at high temperature, there will be a need to install the head of the knitting machine, because there are many heads, not just one head, as long as any one of them appears Problems can cause product weaving confusion to occur.
The physical picture of the knitting machine:

the physical picture of the mold of the knitting machine head:
  After the inner tube and braided wire are finished, the last step is to extrude the outer tube. This link looks simple but is actually very troublesome. It should be noted that the inner tube wrapped with fiber wire will cause an internal space when it passes through the extruder. It will carry a small amount of air. At this time, if the silicone outer tube is extruded, air bubbles will appear and the outer tube will be uneven. The solution is to make the wall thickness of the outer tube a little thicker. When the silicone outer tube is extruded, the outer tube When the material is heavy, the silica gel will properly shrink and tighten, and the internal air will be forced out to the outside to alleviate such problems. Another reason is that the increase in the wall thickness of the outer tube will landfill the original uneven outer wall, so that It can solve the unevenness of the surface of the braided silicone tube. Extruding the outer tube is also the last step in all the production processes of the braided silicone tube and marks the end.
Physical picture of braided silicone tube:

With more than 20 years of production management experience, we insist on providing customers with high-quality braided silicone tube