What should I pay attention to in the production of processed seals for wire harnesses?

Harness processing as the main raw material, with mold high temperature and high pressure vulcanization made of harness processing products for harness processing type products. In the production of wire harness processing type seals, the mold material, dimensional accuracy, exhaust and mold opening difficulty will affect the finished product quality and service life of the model seals. In actual production, a large number of wire harness processed seals are molded. When using wire processing/recycled rubber production molding wire processing seals, improper selection of mold materials, mold structure design is unreasonable, mold cleaning and maintenance is not in place will lead to defective quality of wire processing seals, wire processing products manufacturers need to pay special attention.

1. Harness processing sealing product thickness is uneven, the overall size of the difference between the mold parallelism is poor, poor mold processing, research to match the improper easily lead to harness processing type product size and design drawings with large differences in the problem. In actual production, mold processing should ensure that the mold parallelism; design attention to harness processing shrinkage, improve mold processing accuracy.2. Harness processing sealing products local lack of glue in actual production, used for harness processing sealing mold exhaust conditions are not good, when the gas occupies the position of the adhesive, sealing is prone to local lack of glue. Therefore, in the design of the mold, the need to reasonably increase the exhaust hole, while the remaining glue groove and the upper and lower templates to study, matching in place; use, timely understanding of the mold wear and tear, timely repair or replacement of parts.3. Wire processing sealing burr thickness If the mold used for wire processing sealing does not have the necessary residual glue groove, sealing is prone to parting of the shape when the thickening of the product thickness increases, overweight and other issues. In the design of the mold, you need to leave the residual rubber groove in the appropriate location, and from the residual rubber groove to extrude more rubber to reduce the thickness of the fringe. 4. harness processing sealing in the bubble in the actual production, if the sealing mold exhaust conditions are poor or the mold itself does not have an exhaust port, the harness processing sealing the surface and the interior of the bubble is very easy to appear. Therefore, the design of the mold bixu fully consider the exhaust problem, especially the complex structure of the sealing mold. 5. harness processing seals parting surface misalignment mold manufacturing precision and processing precision is not enough, mold positioning is not accurate, easy to appear harness processing sealing parting surface misalignment, especially O-ring. In the design of wire harness processing type sealing products mold, bixu adopts high precision processing equipment HYL22Y9Y2YYC, design residual glue groove, the use of cone positioning and other advanced mold positioning methods, to avoid the operation of biting the mold. 6. wire harness processing mold opening sealing tearing mold structural design is unreasonable (such as the corners of the edges are not chamfered or not enough guiding angle, the assembly of parting is not conducive to the removal of the parts, the surface is rough, etc.). The mold is opened too quickly resulting in uneven force, the seal is easy to crack when the mold is opened, such as the oil seal edge partially cracked. Therefore, in the design and processing of harness processing sealing mold, structure bixu reasonable, and as far as possible to avoid stress concentration of the mold. Angular parts bixu chamfered and polished, if necessary, can be chrome-plated or chemically treated.7. Harness processing seals appear edge extraction and edge shrinkage Harness processing seals used in the mold structure is not appropriate to lead to the product pulling the edge, shrinkage and other issues, the need for reasonable design of the mold according to the seal's thickness, size, shape. In actual production, thick products are recommended to use closed mold structure, reasonable open residual rubber groove; for harness processing sealing crimping problem, if conditions allow, you can choose the injection mold.8. Harness processing rough sealing surface cavity surface roughness does not meet the requirements, chrome-plated layer partially detached, part of the corrosive rubber compounds corrode the surface of the cavity, etc., will lead to the harness processing HYY sealing. The surface roughness of the wire harness processing HYL23Y9Y2Y seal, and even the appearance of obvious processing knife marks. This problem can be avoided to a certain extent by improving the precision of the mold, timely inspection and repair of the mold.9. Harness processing seals surface or internal mix of impurities. In actual production, if the mold is not cleaned, impurities will be mixed into the surface or inside the seal. So every time after vulcanization need to timely clean the mold mixing rubber, generally using compressed air blowing, regular cleaning mold. 10. harness processing seal has joint traces of mold structure design is unreasonable, such as injection mold runner and structure is unreasonable, will lead to the finished product appeared in the harness processing seal of the joint traces. Vulcanized rubber material has enough fluidity and self-adhesion, mold structure design is reasonable, can effectively avoid joint marks. In actual production, there are still many problems to be noted in the production of wire harness processing seals. In addition to molds, it is also necessary to reasonably select the harness processing raw materials, control the mixing and vulcanization parameters, if necessary, the appropriate use of recycled rubber, not only can effectively reduce the cost of raw materials, but also improve the dimensional stability of semi-finished products and aging resistance, improve the vulcanization process, reduce the vulcanization of the return to the original. Huicheng Yuan has the opportunity to share with you the specific application of recycled rubber in wire harness processing sealing products.

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