Hilti Aktiengesellschaft

Peter Stirnweiss

Erich Leibhard

Erwin Schiefer

A device for melting a rod-shaped member of thermoplastic material and discharging the melted material includes a casing containing a melting chamber. A transport element within the casing grips the rod-shaped member and feeds it into the melting chamber. In a mechanism for displacing the transport element and thereby feeding the rod-shaped member, an overload member is provided which discontinues the displacement of the transport element when a predetermined pressure is exceeded within the melting chamber.

Device for melting and discharging a thermoplastic material

In a device for melting a body of solid thermoplastic adhesive material, a melting chamber is located within the housing and the adhesive material is fed into the melting chamber by a feed apparatus. A rubber-like elastic gasket is located at the inlet end of the chamber providing a seal around the adhesive material entering the chamber for preventing leakage of molten material back into the housing. An insulator ring formed of a thermostable, poor heat conducting material is located between the melting chamber inlet and the gasket to limit the passage of heat to the gasket. Preferably, the insulator ring is formed of TEFLON.

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Maisach, Germany

Peter Stirnweiss