Injection molding nozzle
AssigneeDynisco, Inc.
InventorsPaul M. Swenson, Michael L. Vasapoli, William J. Hume
Life of this patent
Estimating the term…
Abstract
An injection molding nozzle for disposition in a mold. The nozzle is for injecting melt into a cavity of the mold, and includes a body having a through bore extending therethrough for receiving the melt. Attached to the body of the nozzle is a nozzle piece secured to the body that defines an outlet communicating between the body through bore and the cavity gate. A nozzle member surrounds the body at a position upstream of the nozzle piece and has an inner surface contacting the body, and an outer surface contacting the mold. The outer surface forms a seal against melt flow upstream from the nozzle member.
Claims62
An injection molding nozzle for disposition in a mold, said nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle comprising:
- a body having a through bore extending therethrough for receiving the melt,
- a nozzle piece secured to the body and defining an outlet for communicating between the body through bore and the cavity gate, the nozzle piece having an inner piece disposed in a recess formed in said nozzle body, and an outer piece fixedly attached to said nozzle body in said recess, wherein said outer piece surrounds said inner piece and holds said inner piece in place, and the nozzle piece is constructed and arranged so that there is an absence of any contact between said mold and said nozzle piece when said injection molding nozzle is disposed in said mold and melt is injected through the gate;
- and
- a nozzle member that surrounds said body at a position upstream of said nozzle piece and having an inner surface contacting the body, and an outer surface for contacting the mold, said outer surface for forming a seal against melt flow upstream from the nozzle member.
An injection molding nozzle disposed in a mold, said nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle comprising:
- a body having a through bore extending therethrough for receiving the melt,
- a nozzle piece secured to the body and defining an outlet communicating between the body through bore and the cavity gate, the nozzle piece including:
- an inner piece of a highly thermally conductive material disposed in a recess formed in said nozzle body;
- an outer piece of a less thermally conductive material than said inner piece, fixedly attached to said nozzle body in said recess, wherein the outer piece surrounds said inner piece and holds said inner piece in place:
- a nozzle member that surrounds said body at a position upstream of said nozzle piece and having an inner surface contacting the body, and an outer surface contacting the mold, said outer surface forming a seal against melt flow upstream from the nozzle member;
- and
- a sealing member disposed between the nozzle body and the nozzle member at a position downstream of the inner surface of the nozzle member, said sealing member together with said nozzle body and said nozzle member defining a first insulating air gap that surrounds said nozzle body;
- wherein a second insulating air gap surrounds said nozzle body and said nozzle member upstream from said seal, and said outer piece includes an end that, together with said mold, forms a gap that surrounds the gate of said cavity;
- and wherein melt injected into said cavity from said nozzle piece will pass through the gap into a space, contacting said sealing member and said nozzle member.
An injection molding nozzle disposed in a mold, said nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle comprising:
- a body having a through bore extending therethrough for receiving the melt,
- a nozzle piece secured to the body and defining an outlet communicating between the body through bore and the cavity gate, the nozzle piece including:
- an inner piece of a highly thermally conductive material disposed in a recess formed in said nozzle body;
- an outer piece of a less thermally conductive material than said inner piece, fixedly attached to said nozzle body in said recess, wherein the outer piece surrounds said inner piece and holds said inner piece in place;
- and
- a nozzle member that surrounds said body at a position upstream of said nozzle piece and having an inner surface contacting the body, and an outer surface contacting the mold, said outer surface forming a seal against melt flow upstream from the nozzle member;
- wherein said outer piece includes an end that, together with said mold, forms a gap that surrounds the gate of said cavity, and wherein melt injected into said cavity from said nozzle piece will pass through the gap into a space, contacting said nozzle member.
A nozzle piece for an injection molding nozzle for disposition in a mold, said nozzle piece to be secured to a body of the injection molding nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle piece comprising:
- an inner to be piece disposed in a recess formed in said nozzle body;
- and
- an outer piece to be fixedly attached to said nozzle body in said recess, wherein said outer piece is constructed and arranged to surround said inner piece and hold said inner piece in place in said nozzle body, and includes an end that is constructed and arranged, together with said mold, to define a gap that surrounds the gate of said cavity, so that there is an absence of any direct contact between said mold and said nozzle piece when the injection molding nozzle is disposed in the mold and melt is injected through the gate.
A nozzle piece for an injection molding nozzle to be disposed in a mold, said nozzle piece to be secured to a body of the injection molding nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle piece comprising:
- an inner piece to be disposed in a recess formed in said nozzle body;
- and
- an outer piece to be fixedly attached to said nozzle body in said recess, wherein said outer piece is constructed and arranged to surround said inner piece and hold said inner piece in place in said nozzle body, and includes an end that is constructed and arranged, together with said mold, to define a gap that surrounds the gate of said cavity, wherein melt injected into said cavity from said nozzle piece will pass through the gap into a space contacting said mold and said outer piece.
A nozzle piece for an injection molding nozzle disposed in a mold, said nozzle piece to be secured to a body of the injection molding nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle piece comprising:
- an inner piece to be disposed in a recess formed in said nozzle body;
- an outer piece to be fixedly attached to said nozzle body in said recess, wherein said outer piece is constructed and arranged to surround said inner piece, and hold said inner piece in place in said nozzle body;
- and
- a sealing member to be disposed between said inner and outer pieces and to define, together with said inner and outer pieces, an insulating air gap that surrounds the inner piece.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the nozzle body and defining an outlet for communicating between the nozzle body through bore and the gate, wherein the nozzle piece is constructed and arranged so that is an absence of direct contact between the nozzle piece and the mold;
- a nozzle member that surrounds the nozzle body upstream the nozzle piece, the nozzle member being fixedly attached to the nozzle body, and adapted to contact and form a first seal with the mold to prevent melt material from passing into a first air space defined by the injection molding nozzle and the mold;
- and
- a sealing member that contacts the nozzle member and nozzle body for being mounted between the nozzle member and nozzle body, the sealing member adapted to form a second seal that prevents melt material from passing into a second air space defined by the nozzle body and the nozzle member.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the body and defining an outlet for communicating between the nozzle body through bore and the gate, wherein the nozzle piece includes:
- an inner piece disposed in a recess formed in said nozzle body;
- and
- an outer piece fixedly attached to said nozzle body in said recess, wherein said outer piece surrounds said inner piece and includes an end adapted to, together with said mold, define a gap that surrounds the gate of the cavity, wherein when melt is injected from said injection molding nozzle into the cavity, the melt passes through the gap into a space defined by an outer surface of the injection molding nozzle and the mold.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- and
- a nozzle piece secured to the body defining an outlet for communicating between the nozzle body through bore and the gate, wherein the nozzle piece includes:
- an inner piece disposed in a recess formed in said nozzle body;
- and
- an outer piece fixedly attached to said nozzle body in said recess, wherein said outer piece surrounds said inner piece and wherein the outer piece is constructed and arranged so that there is an absence of direct contact between said nozzle piece and said mold when melt material is injected through the gate.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the body defining an outlet for communicating between the nozzle body through bore and the gate, wherein the nozzle piece includes an end adapted to, together, with said mold, define a gap that surrounds the gate of the cavity, wherein when melt material is injected from said injection molding nozzle into the cavity, the melt passes through the gap into a space defined by an outer surface of the nozzle and the mold;
- a nozzle member that surrounds the nozzle body upstream the nozzle piece, the nozzle member being fixedly attached to the nozzle body, and adapted to contact and form a first seal with the mold to prevent melt material from passing into a first air space defined by the nozzle and the mold;
- and
- a sealing member that contacts the nozzle member and nozzle body and is mounted between the nozzle member and the nozzle body, that forms a second seal with the nozzle body and nozzle member and that prevents melt material from passing into a second air space defined by the nozzle body and the nozzle member.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the body and defining an outlet communicating between the body nozzle though bore and the gate, wherein the nozzle piece includes:
- an inner portion having a through bore extending therethrough for receiving the melt material;
- and
- an outer portion having an end that extends past said inner portion toward the mold, said end adapted to, together with said mold, define a gap that surrounds the gate of the cavity, wherein when melt is injected from said injection molding nozzle into the cavity, the melt passes through the gap into a space defined by an outer surface of the injection molding nozzle and the mold.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the body defining an outlet for communicating between the nozzle body through bore and the gate, wherein the nozzle piece includes:
- an inner portion having a through bore extending therethrough for receiving the melt material;
- and
- an outer portion including an end constructed and arranged to extend past said inner portion toward the mold and so that there is an absence of direct contact between said nozzle piece and said mold when melt material is injected through the gate.
A nozzle piece for an injection molding nozzle to be disposed in a mold, said nozzle piece to be secured to a body of the injection molding nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle piece comprising:
- an inner piece to be disposed in a recess formed in said nozzle body;
- and
- an outer piece to be secured to said nozzle body, wherein said outer piece is constructed and arranged to surround and be coaxial with said inner piece, and hold said inner piece in place in said nozzle body, and includes an end that is constructed and arranged, together with said mold, to define a gap that surrounds gate of said cavity, and said outer piece is further constructed and arranged to be dimensioned relative to the mold to define a gap extending along the entire interface between the outer piece and the mold when melt is injected through the gate.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the nozzle body defining an outlet for communicating between the nozzle body through bore and the gate, the nozzle piece adapted to be dimensioned relative to the mold to define a gap extending along the entire interface between the nozzle piece and the mold when melt material is injected through the gate;
- a nozzle member that surrounds the nozzle body, the nozzle member being supported about the nozzle body;
- and
- a sealing member supported by the nozzle member, the sealing member adapted to form a seal that prevents melt material from passing from a space defined by the nozzle body, mold and nozzle member.
An injection molding nozzle for injecting melt material through a gate and into a cavity within a mold, the nozzle comprising:
- a nozzle body having a through bore extending therethrough for receiving the melt material;
- a nozzle piece secured to the nozzle body defining an outlet for communicating between the nozzle body through bore and the gate, the nozzle piece having a gap defining face that is adapted to face a gap defining face of said mold, said nozzle piece face and said mold face defining said gap, said gap extending along the entire interface between the nozzle piece and the mold when melt material is injected through the gate;
- a nozzle member that surrounds the nozzle body, the nozzle member being supported about the nozzle body;
- and
- a sealing member supported by the nozzle member, the sealing member adapted to form a seal that prevents melt material from passing from a space defined by the nozzle body, mold and nozzle member.
A nozzle piece for an injection molding nozzle to be disposed in a mold, said nozzle piece to be secured to a body of the injection molding nozzle for injecting melt through a gate and into a cavity of the mold, said nozzle piece comprising:
- an inner piece to be secured to said nozzle body;
- an outer piece to be secured to said nozzle body, wherein said outer piece is constructed and arranged to surround, and be coaxial with said inner piece;
- and
- a sealing member to be disposed between said inner and outer pieces and to define, together with said inner and outer pieces, an insulating air gap that surrounds the inner piece.
Dependencies are inferred from the claim text.