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 provides a cost-effective alternative to rubber molding for larger gaskets. Plus, this innovative splicing technique is faster and more energy-efficient than hot splicing.
Infrared splicing uses infrared (IR) light and polyethylene (PE) film to join lengths of rubber into custom gaskets. A form of electromagnetic radiation, IR emits heat that melts or softens the film’s adhesive, which is typically acrylic. This permanent adhesive sticks to each length of rubber, and the film joins the two pieces together with strong, reliable bonds that resist water and weather. Applications for IR spliced gaskets include the rubber gate seals used in water treatment facilities.
How Infrared Splicing Works
Infrared splicing is a semi-automatic process that’s performed on a single-unit joining press. At Elasto Proxy, our IR splicing machine features a distance knife, infrared heating elements, splicing mold, foot pedal, and digital display. PE film is fed from a roll, cut with the knife, and heated with IR light. The infrared splicer that we use supports PE films with a width of 50, 60, or 70 mm and a thickness of 75 to 300 grams. Watch this YouTube video to see how our skilled production personnel create IR spliced gaskets. Continue reading Infrared Splicing for Rubber Gaskets
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