Common quality defects and prevention of high-pressure hose assemblies, no matter how precise the instrument is, there will be mistakes. The following describes the prevention methods when quality defects occur.
①The reasons for the twisting of the tube core are the bending of the iron core, the non-parallel forming rollers, the uneven tension of the forming tape (film), and the inner rubber and the iron core not being tightly attached. If the above problems occur, you can straighten or replace the iron core, correct and adjust the forming roller, control the tension of the rubber cloth (film) during forming, check the diameter of the inner tube blank, and control the process of extrusion of the inner rubber.
②The reasons for the delamination of the tube blank include oil stains between the film and the tape, solvents or insulating substances that affect the adhesion, insufficient pressure of the water-covered cloth, and too fast rolling speed during molding. When the above problems occur, the tube blank can be cleaned, the pressure of the water-covered cloth can be appropriately increased, and the rolling speed can be reduced.
③The reason for the crack of the outer rubber is that the tension of the water-wrapped cloth is insufficient and the plasticity of the rubber is poor. When the above problems occur, the tension of the water-wrapped cloth can be appropriately increased, and the quality of hot refining and calendering in the previous process can be affected.
④The reasons for the "bamboo leaf shape" on the surface of the tube blank are the uneven thickness of the tube diameter, the uneven tension of the water-covered cloth and the uneven lap width. When the above problems occur, the diameter should be strictly controlled to be uniform, and the tension and overlap width of the water-covered cloth should be controlled to be uniform and uniform.
⑤ The reason for the ovality of the outer surface of the tube blank is that the overlapping width of the film and the tape is too large. If there is a problem, the cutting width of the tape and the film in the previous process should be controlled to be too large.
