An injection molding die for a mold for fabricating a plastic filter component including a net, at least one supporting rib, and a frame. The molding die includes a plurality of net grooves including a first set of net grooves and a second set of net grooves intersecting at least some of the first s
An injection molding die for a mold for fabricating a plastic filter component including a net, at least one supporting rib, and a frame. The molding die includes a plurality of net grooves including a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves. The plurality of net grooves are for receiving plastic for forming the net of the plastic filter component. At least one rib groove is contiguous and in flow communication with at least some of the net grooves. The at least one rib groove is deeper than the net grooves and is for forming the at least one supporting rib subdividing the net into at least two portions. A frame cavity around the net grooves is in flow communication therewith, for receiving plastic for forming the frame. At least one damming device extending into the mold and located to act as a restriction for controlling plastic flow therepast and into at least some of the net grooves.
대표청구항▼
What is claimed is: 1. An injection molding die for a mold for fabricating a plastic filter component comprising a net, at least one supporting rib, and a frame, the molding die comprising: a plurality of net grooves comprising a first set of net grooves and a second set of net grooves intersecting
What is claimed is: 1. An injection molding die for a mold for fabricating a plastic filter component comprising a net, at least one supporting rib, and a frame, the molding die comprising: a plurality of net grooves comprising a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves, the plurality of net grooves for receiving plastic material for forming the net of the plastic filter component; at least one rib groove contiguous and in flow communication with at least some of the net grooves, the at least one rib groove being deeper than said net grooves, said at least one rib groove for receiving plastic material for forming the at least one supporting rib of the plastic filter component and being dimensioned so that said at least one supporting rib divides said net into at least two isolated portions; a frame cavity around the net grooves and in flow communication therewith, for receiving plastic material for forming the frame of the plastic filter component; and at least one restriction positioned in said at least one rib groove, the depth of said at least one restriction in said at least one rib groove being adjustable to control plastic material flow therepast and into at least some of said net grooves. 2. The injection molding die according to claim 1, wherein said at least one restriction comprises a plurality of axially adjustable damming pins extending into the mold. 3. The injection molding die according to claim 1, further comprising: at least one overflow pocket communicating with selected ones of said net grooves for receiving overflow plastic material thereby to form an overflow dimple in at least one of said isolated portions of said plastic filter component. 4. The injection molding die according to claim 1, wherein said at least one rib groove comprises a plurality of rib grooves for forming a plurality of supporting ribs subdividing the net into a plurality of isolated portions, each of said plurality of rib grooves being contiguous and in flow communication with a plurality of said net grooves. 5. The injection molding die according to claim 1, wherein said at least one rib groove comprises a plurality of generally parallel first rib grooves and a plurality of generally parallel second rib grooves, each of said first rib grooves intersecting at least some of said second rib grooves for forming a plurality of supporting ribs subdividing the net into a plurality of isolated portions, each of said plurality of rib grooves being contiguous and in flow communication with a plurality of said net grooves. 6. The injection molding die according to claim 5, further comprising a plurality of overflow pockets communicating with selected ones of said net grooves, for receiving overflow plastic material thereby to form overflow dimples in respective ones of said isolated portions of said plastic filter component. 7. The injection molding die according to claim 1, wherein at least some of said net grooves have cross-sections that are generally parabolic in shape. 8. The injection molding die according to claim 4, wherein the frame cavity is cylindrically shaped. 9. The injection molding die according to claim 8, further comprising a cylindrically shaped interior frame groove concentric with said frame cavity, said net grooves and said rib grooves being located between said frame cavity and said interior frame groove. 10. The injection molding die according to claim 1, further comprising a gate in flow communication with said frame cavity for injecting plastic material into said frame cavity. 11. An injection molding die for a mold for fabricating a plastic filter component comprising a net, at least one supporting rib, and a frame, the molding die comprising: a core portion having a first surface; a cavity portion receiving the core portion and having a second surface in abutment with said first surface; a plurality of net grooves formed in at least one of said first and second surfaces, said net grooves comprising a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves, the plurality of net grooves for receiving plastic material for forming the net of the plastic filter component; at least one rib groove formed in at least one of said first and second surfaces, said at least one rib groove being contiguous and in flow communication with at least some of the net grooves, the at least one rib groove being deeper than said net grooves, said at least one rib groove for receiving plastic material for forming the at least one supporting rib of the plastic filter component; at least one plastic material overflow pocket formed in at least one of said first and second surfaces, said at least one plastic material overflow pocket being isolated from said at least one rib groove and being in flow communication with at least one of the net grooves; a frame cavity defined by a space between the cavity portion and the core portion, said frame cavity surrounding the net grooves and the at least one rib groove and being in flow communication, with the net grooves and said at least one rib groove, said frame cavity for receiving plastic material for forming the frame of the plastic filter component; and at least one adjustable restriction associated with said at least one rib groove so as to control plastic material flow therepast and into at least some of said net grooves. 12. The injection molding die according to claim 11, wherein said net grooves are formed in one of said first and second surfaces and wherein said at least one rib groove and at least one plastic material overflow pocket are formed in the other of said first and second surfaces. 13. The injection molding die according to claim 12, wherein said at least one rib groove comprises a plurality of rib grooves for forming a plurality of supporting ribs of said plastic filter component, each of said plurality of rib grooves being contiguous and in flow communication with a plurality of said net grooves. 14. The injection molding die according to claim 13, wherein the plurality of rib grooves comprises a first set of rib grooves and a second set of rib grooves intersecting at least some of the first set of rib grooves. 15. The injection molding die according to claim 14, wherein the net grooves of said first set and the net grooves of said second set are substantially orthogonal and wherein the rib grooves of said first set and the rib grooves of said second set are substantially orthogonal. 16. The injection molding die according to claim 15, further comprising a plurality of plastic material overflow pockets formed in said second surface at spaced locations. 17. The injection molding die according to claim 16, wherein the rib grooves of said first and second sets divide said second surface into an array of isolated surface portions, selected isolated surface portions comprising at least one plastic material overflow pocket. 18. The injection molding die according to claim 17 wherein each selected isolated surface portion comprises a single plastic material overflow pocket. 19. The injection molding die according to claim 17 wherein said plastic material overflow pockets are semi-spherical recesses formed in said second surface. 20. The injection molding die according to claim 14 wherein the rib grooves of said first and second sets divide said second surface into an array of isolated surface portions, each isolated surface portion being bounded by rib grooves, selected isolated surface portions comprising at least one plastic material overflow pocket isolated from said rib grooves. 21. The injection molding die according to claim 20 wherein each selected isolated surface portion comprises a single plastic material overflow pocket. 22. The injection molding die according to claim 20 wherein said plastic material overflow pockets are semi-spherical recesses formed in said second surface. 23. The injection molding die according to claim 14, wherein said at least one restriction comprises a plurality of axially adjustable damming pins positioned in selected rib grooves. 24. The injection molding die according to claim 14, wherein at least some of said net grooves have cross-sections that are generally parabolic in shape. 25. The injection molding die according to claim 14, further comprising a gate in flow communication with said frame cavity for injecting plastic material into said frame cavity. 26. An injection molding die for a mold for fabricating a plastic filter component comprising a net, supporting ribs, and a frame, the molding die comprising: a core portion having a first surface; a cavity portion receiving said core portion and having a second surface in abutment with said first surface; a plurality of net grooves formed in one of said first and second surfaces, said net grooves comprising a first set of net grooves and a second set of net grooves intersecting at least some of the first set of net grooves, the plurality of net grooves for receiving plastic material for forming the net of the plastic filter component; a plurality of rib grooves formed in the other of said first and second surfaces, said rib grooves comprising a first set of rib grooves and a second set of rib grooves intersecting at least some of the first set of rib grooves, said rib grooves dividing the other of said first and second surfaces into a plurality of isolated surface portions bounded by rib grooves, each rib groove being contiguous and in flow communication with a plurality of net grooves, the rib grooves being deeper than said net grooves, said rib grooves for receiving plastic material for forming the supporting ribs of the plastic filter component; at least one plastic material overflow pocket formed in at least one of said isolated surface portions, said at least one plastic material overflow pocket being isolated from said rib grooves and being in flow communication with at least one of the net grooves; a frame cavity surrounding the net grooves and the rib grooves and being in flow communication with said net grooves and said rib grooves, for receiving plastic material for forming the frame of the plastic filter component; and at least one restriction positioned in at least one of said rib grooves to control plastic material flow therepast and into at least some of said net grooves. 27. The injection molding die according to claim 26 wherein the rib grooves of said first and second sets divide said second surface into an array of isolated surface portions, selected isolated surface portions comprising at least one plastic material overflow pocket. 28. The injection molding die according to claim 27 wherein each selected isolated surface portion comprises a single plastic material overflow pocket. 29. The injection molding die according to claim 28 wherein said plastic material overflow pockets are semi-spherical recesses formed in said second surface. 30. The injection molding die according to claim 26, wherein said at least one restriction comprises a plurality of damming pins in selected rib grooves. 31. The injection molding die according to claim 26, wherein the at least one restriction comprises a restriction in the cross-sectional area of selected rib grooves. 32. The injection molding die according to claim 26, wherein the net grooves of said first set and the net grooves of said second set are substantially orthogonal and wherein the rib grooves of said first set and the rib grooves of said second set are substantially orthogonal. 33. The injection molding die according to claim 26, wherein at least some of said net grooves have cross-sections that are generally parabolic in shape. 34. The injection molding die according to claim 26, further comprising a gate in flow communication with said frame cavity for injecting plastic material into said frame cavity. 35. The injection molding die according to claim 4 comprising a plurality of adjustable restrictions, each positioned in a respective one of said rib grooves.
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이 특허에 인용된 특허 (9)
Ueno Masato (Hiroshima JPX), Device for supplying plastic material for denture base and flask with the same.
Beach Donald W. (Cookeville TN) Holzhausen Udo E. (Cookeville TN) Feldhaus Lawrence B. (Hendersonville TN) Matheson Charles L. (Cookeville TN) Newton Monroe L. (Cookeville TN) Robbins Steve F. (Cooke, Plastic filter.
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