John C Wolfe

US Patent:

47521961, Jun 21, 1988

Filed:

May 22, 1986

Appl. No.:

6/865997

Inventors:

John R. Wolfe - Rogers AR

Assignee:

Rogers Tool Works, Inc. - Rogers AR

International Classification:

B29C 4730
B29C 4786

US Classification:

425 67

Abstract:

A die assembly for plastic pelletizing apparatus of the type including a cooling bath into which the plastic is extruded. The die assembly includes a heated main body having first and second oppositely disposed exterior faces connected by a plurality of relatively small extrusion passageways. A layer of thermal insulation material overlies the second face, and a cover member having an outer surface adapted to be exposed to the cooling bath is positioned over the thermal insulation material and joined to the main body. Wear resistant insert members formed from a material having a higher coefficient of thermal conductivity than the material from which the cover member is made extend from the outer surface of the cover member through the layer of insulation into the main body. Extrusion outlet orifices are formed through the insert members and define continuations of the extrusion passageways of the main body. The relationship between the inserts, the cover, the insulation, and the main body produces an increased heat flow from the main body to the outer die face in confined areas about the orifices.

US Patent:

43789641, Apr 5, 1983

Filed:

Jan 8, 1980

Appl. No.:

6/110515

Inventors:

John R. Wolfe - Rogers AR

Assignee:

TRW Inc. - Cleveland OH

International Classification:

B29B 103

US Classification:

425463

Abstract:

An extrusion die of the type particularly suited for use in underwater pelletizing of polymeric materials. The die includes a die body having a forward end face with a plurality of extrusion ports passing therethrough terminating at the forward end face. A layer of insulating material is interposed between the forward end face at the area of the extrusion ports and a subplate which is constructed from the same material as the die body. The subplate is fixedly secured to the die body so as to form a substantially integral relationship therewith. A hardened facing construction is fixedly secured to the outer end face of the subplate. Both the facing and subplate allow communication therethrough with the extrusion ports. The insulating material retards or reduces heat transfer from the heated die body to the cooled facing during an extruding operation. A die body heating fluid flow passage in heat transfer relationship with the extrusion ports may include insulating material on a portion of the side walls thereof.

US Patent:

42783739, Jul 14, 1981

Filed:

May 3, 1979

Appl. No.:

6/035606

Inventors:

John R. Wolfe - Fayetteville AR

Assignee:

TRW Inc. - Euclid OH

International Classification:

B23B 5100

US Classification:

408188

Abstract:

An indexable insert drill particularly suited for use in machining soft metals such as aluminum or the like. The drill includes an elongated body having a drilling portion with at least one groove extending axially along a portion thereof from the drilling portion end. In one embodiment, a generally triangular cutting insert is fixedly mounted in a receiving pocket included in the groove so that in cutting presentment, the insert cutting edge extends radially of the drilling portion from an innermost end area at the drilling portion longitudinal axis to an outermost end area outwardly of the drilling portion side wall. The cutting insert is configured so that the cutting edge will have neutral lead, neutral radial rake and positive axial rake when the insert is mounted in the receiving pocket. The receiving pocket includes a back tapered side wall defining an insert retaining area for conveniently capturing a side of the cutting insert. In another embodiment, the body drilling portion includes a pair of grooves and a cutting insert associated with each in a manner such that the cutting edges are disposed diametrically across the body drilling portion in a radially and axially offset relationship.

US Patent:

48569747, Aug 15, 1989

Filed:

Jun 8, 1988

Appl. No.:

7/203812

Inventors:

John R. Wolfe - Rogers AR

Assignee:

Rogers Tool Works, Inc. - Rogers AR

International Classification:

B29C 4730
B29C 4786

US Classification:

425 67

Abstract:

A die assembly for plastic pelletizing apparatus of the type including a cooling bath into which the plastic is extruded. The die assembly includes a heated main body having first and second oppositely disposed exterior faces connected by a plurality of relatively small extrusion passageways. A layer of thermal insulation material overlies the second face, and a cover member having an outer surface adapted to be exposed to the cooling bath is positioned over the thermal insulation material and joined to the main body. Wear resistant insert members formed from a material having a higher coefficient of thermal conductivity than the material from which the cover member is made extend from the outer surface of the cover member through the layer of insulation into the main body. Extrusion outlet orifices are formed through the insert members and define continuations of the extrusion passageways of the main body. The relationship between the inserts, the cover, the insulation, and the main body produces an increased heat flow from the main body to the outer die face in confined areas about the orifices.