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Polyshot to sell metal-injection-molded mold cavities in North America 536

Hot runner supplier Polyshot Corp. will be the exclusive North American distributor of mold cavities molded from powdered metal using an injection molding process developed by Plasel Mold of Lavon, Israel. Tolerances to 15-mic can be achieved.

PlasticsToday Staff

March 29, 2011

1 Min Read
Polyshot to sell metal-injection-molded mold cavities in North America

Polyshot's president Doug Hepler calls this "game-changing technology for the moldmaking industry," adding that the technology delivers higher repeatability and precision that conventional metal working processes. The initial marketing targets are high-cavitation molds, usually 32 or more cavities, typically for medical and consumer products, says Hepler..

Polyshot says Plasel's process allows PMT (powdered metal technology) duplication from a master mold, which guarantees that all cavities are precisely the same regardless of volume or date of manufacture. It adds that tolerances up to 15 microns can be achieved, depending on cavity size and configuration.

The PMT cavities are molded of H-13 tool steel and hardened to standard Rockwell hardness ratings with surface finishes up to Rmax2, says Polyshot. Fine details and sharp corners can be produced, as well as unique shapes difficult to produce with other metalworking processes. Maximum PMT cavity size is 25 mm by 30 mm by 70 mm.

Cooling of the PMT cavities is external, with the cavities inserted in plates that are cooled from a mold base incorporating water lines. Polyshot adds that cycle times as low as 3.2 seconds are possible for small parts.

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