초록 ▼

A modular apparatus for extruding a pressurized molten thermoplastic material comprising a service block module which defines a first passage for the material and includes front and rear surfaces. A removable gun module is attachable to the front surface of the service block module. A combination fi

A modular apparatus for extruding a pressurized molten thermoplastic material comprising a service block module which defines a first passage for the material and includes front and rear surfaces. A removable gun module is attachable to the front surface of the service block module. A combination filter-control valve assembly is contained within the service block module. The assembly communicates with the first passage so as to filter and control the flow of material to the gun module.

대표청구항 ▼

A modular apparatus for extruding a molten thermopolastic material from a pressurized source, the apparatus comprising: a service block module defining a first passage for the molten thermoplatic material, said service block module including front and rear surfaces; a removable gun module attachable

A modular apparatus for extruding a molten thermopolastic material from a pressurized source, the apparatus comprising: a service block module defining a first passage for the molten thermoplatic material, said service block module including front and rear surfaces; a removable gun module attachable to the front surface of said service block module; said service block module further defining a second passage acutely disposed with respect to said first passage, said second passage opening at the rear surface, said first and second passages intersecting with each other; a heating means contained within said service block module; a filter positioned within said second passage so as to communicate with incoming molten material; and a flow control assembly positioned within said second passage so as to communicate with incoming molten material, said flow flow control assembly including; an elongated body with a central bore and a plurality of ports communicating with said bore, a valve seat positioned within said bore, and an adjustable needle valve movable between one position in which said needle valve seats against said valve seat ceasing the flow of molten material to said gun module and another position in which said needle valve is spaced apart from said valve seat a selected distance thereby allowing a selected flow of molten material to said gun module.