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US 10,703,031 B2Granted
Method of injection molding an article
AssigneeSabic Global Technologies B.V.
InventorsLingshan Wang, Xiuqiang Zhang, Fei Shen
Life of this patent
Estimating the term…
Abstract
The present invention relates to articles, systems, and methods for injection molding an article. The method includes directing a first shot of molten polymeric material into a mold cavity to form a first part while simultaneously occluding a portion of the gate orifice area with a mold core. Once the first shot is solidified, then the mold core is withdrawn and a second shot is directed into the space previously occupied by the mold core while a portion of the gate orifice area is occluded by the solidified first shot.
Claims25
A method of injection molding an article, the method comprising:
- using an injection molding machine that includes
- a melt source of molten material,
- a mold defining a mold cavity,
- a gate in fluid communication with the melt source and the mold cavity,
- wherein the gate defines an orifice area, and
- a mold core movable relative to the gate;
- directing a first shot of molten material into the mold cavity through a first portion of the orifice area of the gate while simultaneously occluding a second portion of the orifice area of the gate with the mold core;
- solidifying the first shot of molten material to form a first part of the article;
- directing the mold core away from the gate after the first part has been formed;
- directing a second shot of molten material into the mold cavity through the second portion of the orifice area of the gate while simultaneously occluding the first portion of the orifice area of the gate with the first part of the article;
- and
- solidifying the second shot of molten material to form a second part of the article,
- wherein the mold core has a shape that includes a plurality of prongs with parallel opposing surfaces, and
- wherein the first shot of molten material is directed between the prongs while the prongs are simultaneously occluding the second portion of the orifice area.
11 more elements
A method of injection molding an article, the method comprising:
- using an injection molding machine that includes
- a melt source of molten material,
- a mold defining a mold cavity,
- a first gate in fluid communication with the melt source and the mold cavity,
- wherein the first gate defines an orifice area, and
- a mold core movable relative to the first gate;
- directing a first shot of molten material into the mold cavity through a first portion of the orifice area of the first gate while simultaneously occluding a second portion of the orifice area of the first gate with the mold core;
- solidifying the first shot of molten material to form a first part of the article;
- directing the mold core away from the first gate after the first part has been formed;
- directing a second shot of molten material into the mold cavity through the second portion of the orifice area of the first gate while simultaneously occluding the first portion of the orifice area of the first gate with the first part of the article;
- and solidifying the second shot of molten material to form a second part of the article;
- and
- wherein the injection molding machine includes a plurality of gates that each define an orifice area and the mold core includes a plurality of prongs with parallel opposing surfaces, and wherein directing the first shot of molten material into the mold cavity includes directing the molten material though a first portion of the orifice area of each gate while simultaneously occluding a second portion of the orifice area of each gate with the prongs of the mold core, and wherein directing a second shot of molten material into the mold cavity includes directing the molten material through the second portion of the orifice area of each gate while simultaneously occluding the first portion of the orifice area of each gate with the first part of the article.
10 more elements
A method of injection molding an article, the method comprising:
- using an injection molding machine that includes
- a melt source of molten material,
- a mold defining a mold cavity,
- a first gate in fluid communication with the melt source and the mold cavity,
- wherein the first gate defines an orifice area, and
- a mold core movable relative to the first gate;
- directing a first shot of molten material into the mold cavity through a first portion of the orifice area of the first gate while simultaneously occluding a second portion of the orifice area of the first gate with the mold core;
- solidifying the first shot of molten material to form a first part of the article;
- directing the mold core away from the first gate after the first part has been formed;
- directing a second shot of molten material into the mold cavity through the second portion of the orifice area of the first gate while simultaneously occluding the first portion of the orifice area of the first gate with the first part of the article;
- and solidifying the second shot of molten material to form a second part of the article;
- and
- wherein the injection molding machine includes a plurality of gates that each define an orifice area wherein directing the first shot of molten material into the mold cavity includes directing the molten material though a first portion of the orifice area of each gate while simultaneously occluding a second portion of the orifice area of each gate with the mold core.
10 more elements
Dependencies are inferred from the claim text.