Injection molding nozzle
AssigneeSajar Plastics, Inc.
InventorJoe L. Johnson
Life of this patent
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Abstract
A nozzle for injecting a viscous fluid, such as a molten plastic and a non-viscous fluid, such as a gas, includes a nozzle body having an inlet end, a discharge end and a flow passage for viscous fluid extending from the inlet end to the discharge end. A shut off valve device is provided for reciprocating in the nozzle body flow passage to control the flow of viscous fluid through the nozzle body discharge end. The shut off valve device includes a valve body and a non-viscous fluid flow passage provided in the valve body. A baffle device is located in the non-viscous fluid flow passage of the shut off valve for retarding a flow of viscous fluid in the non-viscous flow passage.
Claims27
A nozzle for injecting a viscous fluid and a non-viscous fluid, comprising:
- a nozzle body having an inlet end, a discharge end and a flow passage for viscous fluid extending from said inlet end to said discharge end;
- and,
- a shut off valve means for reciprocating in said nozzle body flow passage to control a flow of viscous fluid through said nozzle body discharge end, said shut off valve means comprising:
- a valve body,
- a non-viscous fluid flow passage provided in said valve body, and
- a baffle means located in said non-viscous fluid flow passage for retarding a flow of viscous fluid in said non-viscous fluid flow passage.
An injection molding nozzle that supplies a molten plastic and a gas to an injection mold, comprising:
- a nozzle body including an inlet end, a discharge end, and a flow passage therebetween;
- and,
- a shut off valve means movably mounted in said nozzle body flow passage for controlling a flow of a molten plastic through said nozzle body flow passage, said shut off valve means comprising:
- a pin having a first end and a second end, a first bore extending from said pin first end to said pin second end, wherein a longitudinal axis of said pin is coaxial with a longitudinal axis of said nozzle body,
- a rod to which a second end of said pin is fastened, said rod having a second bore which communicates with said pin first end, said rod extending in a direction substantially normal to said pin, and
- a baffle means, located in at least one of said pin first bore and said rod second bore, for retarding a flow of molten plastic in said first and second bores.
A nozzle for injecting a viscous fluid and a non-viscous fluid, comprising:
- a nozzle body having an inlet end adapted for connection to an associated injection molding machine, a discharge end adapted for connection to an associated injection mold and a flow passage for viscous fluid extending from said inlet end to said discharge end;
- a plug body disposed in said nozzle body flow passage, said plug body having a forwardly opening axial bore and opposed axially elongate slots communicating with said axial bore;
- a shut off valve mechanism reciprocable in said plug body bore for controlling the flow of viscous fluid through said nozzle body discharge end, comprising:
- a valve stem slidably positioned in said plug body axial bore,
- a cross link rod, a central section of which is received in said plug body opposed slots, wherein one end of said valve stem is secured to said cross link rod,
- a non-viscous fluid flow passage provided in said valve stem and cross link rod, and
- a baffle means located in said non-viscous fluid flow passage for retarding a flow of viscous fluid into said non-viscous fluid flow passage;
- and,
- a cylinder means for selectively urging said shut off valve mechanism to one end position.
Dependencies are inferred from the claim text.