Method for circulating pressurized fluids to improve gas channel cooling
AssigneeInfiltrator Systems, Inc.
InventorsRoy E. Moore, Jr., Daniel J. Swistak
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a molded article comprises injecting a quantity of molding material sufficient for the preparation of the molded article into a cavity of a mold, injecting a first portion of fluid into the mold cavity, creating a gas channel within the molding material, and forming the molded article within the mold cavity. At least a portion of the first portion of fluid is exhausted through a gas port, a second portion of fluid is injected into the mold material, and the molded article is cooled within the mold cavity to a temperature beneath a softening point of the molding material.
Claims29
A method for manufacturing a molded article, comprising:
- injecting a quantity of molding material sufficient for the preparation of the molded article into a cavity of a mold;
- injecting a first portion of fluid into the mold material;
- creating a fluid channel within the molding material;
- forming the molded article within the mold cavity;
- exhausting at least a portion of the first portion of fluid through a fluid port;
- cooling the exhausted portion of fluid and re-injecting the cooled fluid into the first fluid channel;
- and
- cooling the molded article within the mold cavity to a temperature beneath a softening point of the molding material.
A method for manufacturing a molded article, comprising:
- injecting a quantity of molding material sufficient for the preparation of the molded article into a cavity of a mold;
- injecting a first portion of fluid into the mold material;
- creating a first fluid channel within the molding material;
- forming the molded article within the mold cavity;
- exhausting at least a portion of the first portion of fluid through a fluid port having a porous pin;
- injecting a second portion of fluid into the mold material;
- cooling the molded article within the mold cavity to a temperature beneath a softening point of the molding material;
- and
- re-injecting the exhausted fluid into the mold cavity through a gas rib, the fluid port, or an injection nozzle assembly.
A method for manufacturing a molded article, comprising:
- injecting a quantity of molding material sufficient for the preparation of the molded article into a cavity of a mold;
- injecting a first portion of fluid into the mold material;
- creating a first fluid channel within the molding material;
- forming the molded article within the mold cavity;
- exhausting at least a portion of the first portion of fluid through a first fluid port;
- injecting a second portion of fluid into the mold material through a second fluid port;
- cooling the molded article within the mold cavity to a temperature beneath a softening point of the molding material;
- injecting a third portion of fluid to the mold cavity through the second fluid port or a third fluid port;
- wherein the third portion of fluid has a lower pressure than the first portion of fluid;
- and
- ceasing the injection of the third portion of fluid once fluid communication is established between the first portion of fluid and the third portion of fluid.
A method for manufacturing a molded article, comprising:
- injecting a quantity of mold material sufficient for the preparation of the molded article into a cavity of a mold;
- injecting a first portion of fluid into the mold material through a first fluid port comprising a porous pin;
- creating a first fluid channel within the mold material;
- forming the molded article within the mold cavity;
- exhausting at least a portion of the first portion of fluid;
- injecting a second portion of fluid through a second fluid port into the mold material, wherein the second fluid port is spaced apart from the first fluid port;
- and
- cooling the molded article within the mold cavity to a temperature beneath a softening point of the mold material.
A method for manufacturing a molded article, comprising:
- injecting a quantity of mold material sufficient for the preparation of the molded article into a cavity of a mold;
- injecting a first portion of fluid through a first fluid port into the mold material;
- creating a first fluid channel within the mold material;
- forming the molded article within the mold cavity;
- injecting a second portion of fluid into the mold material through a second fluid port located a distance from the first fluid port;
- wherein the second portion of fluid has a different pressure than the first portion of fluid;
- ceasing the injection of the second portion of fluid once fluid communication is established between the first portion of fluid and the second portion of fluid to form a combined fluid channel;
- and
- cooling the molded article to a temperature beneath a softening point of the mold material.
Dependencies are inferred from the claim text.