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Custom Diaphragms Molded Of Co-Polyester TPE By Minnesota Rubber & Plastics Provide High Tensile Strength For Static Actuation Switch Seal For Water Pump Device

River Falls, WI: Switching from fabric reinforced diaphragms molded of rubber to diaphragms custom injection molded of a thermoplastic elastomer (TPE) delivers tensile strength while eliminating the threat of pin-hole diaphragm seal leaks. These diaphragms are a critical component for sealing actuation switches.

By converting the thermoset fabric reinforced rubber diaphragm to a functionally improved co-polyester, Minnesota Rubber & Plastics eliminated the possibility of pinhole leaks between fabric weave caused by rubber tear and de-lamination. Subjected to and proven by 300 PSI burst test pressure, these injection molded parts also deliver the demanding flex-life and chemical resistance while adding cost reduction opportunities.

Measuring 2-1/2 inch diameter x 1/32 inch thickness with six equally spaced 1/16 inch mounting holes, these TPE diaphragms can be created in virtually any custom size/configuration to meet customer requirements.  The chosen material offers the tensile to replace the fabric in this application while component geometry was modified to accommodate differences in the material’s stiffness.

Custom diaphragms may be combined with other rubber and plastic components to form a completed assembly for an even more cost effective design. Potential efficiencies include reduced assembly time, material usage, vendor sources and required capital expense.

To advance customer assembly programs, Minnesota Rubber & Plastics offers comprehensive design services including: preliminary engineering assistance and mechanical design review; materials engineering including research and development into specialty compounds; rapid mold design and development, and prototype services; process engineering; injection, compression, transfer and liquid silicone rubber molding including metal-to-plastics conversions.