Hot splicing uses heat, pressure, and a film splice to join the ends of rubber profiles into bonded gaskets. This joining technique uses either a conventional heating source or infrared (IR) light and polyethylene (PE) film. Hot splicing creates strong bonds at the molecular level and generally provides better results than vulcanization, a bonding technique that uses uncured rubber instead of a film splice.
Choosing the best way to bond rubber gaskets can be a complex decision, however. The profile material is just one of many considerations. You also need to consider the size and shape of the seal, production quantities and costs, and the way that lengths of rubber are cut. In addition, it’s important to inspect and install your gaskets properly to ensure reliable sealing and prevent avoidable waste.
Infrared splicing isn’t the same as hot splicing, but both joining techniques offer advantages. Which splicing technique is right for your custom rubber gaskets – and how do these film splicing methods compare to cold bonding?
Splicing joins lengths of extruded rubber to create elastomeric products such as hollow O-rings, low-closure force seals, and large-diameter profiles that are too expensive to mold. Splicing methods vary, and choices include film splicing, cold bonding, C-press injection molding, and vulcanizing. By working with an experienced gasket fabricator, you can select the right splicing technique for your application.
Each splicing method offers advantages, but film splicing creates strong bonds without adhesives. This joining method also supports fast cycle times and creates strong corners that won’t crack. Film splicing isn’t new, but it’s important to understand how infrared splicing compares to traditional hot splicing. For larger seals, more durable splices, and an alternative to molded parts, IR splicing is a strong choice. Continue reading Infrared Splicing for Custom Rubber Gaskets