IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0065167
(2005-02-24)
|
등록번호 |
US-7344372
(2008-03-18)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Mold Masters (2007) Limited
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
30 |
초록
▼
A nozzle in an injection molding machine allows for smooth, blended melt flow into a mold cavity. In one example, this is accomplished through use of a nozzle having a nozzle body with a nozzle melt channel in fluid communication with a manifold melt channel and a nozzle tip. The nozzle tip includes
A nozzle in an injection molding machine allows for smooth, blended melt flow into a mold cavity. In one example, this is accomplished through use of a nozzle having a nozzle body with a nozzle melt channel in fluid communication with a manifold melt channel and a nozzle tip. The nozzle tip includes a first melt channel in fluid communication with the nozzle melt channel and a plurality of release melt channels between the first melt channel and an annular melt channel. The annular melt channel is formed between a retaining device and the nozzle tip. The annular melt channel includes a decompression chamber in fluid communication with respective ones of the release melt channels and a compression chamber between the decompression chamber and a mold. A pressure difference formed between the respective release melt channels and the decompression chamber and between the decompression chamber and the compression chamber blends the molten material to even and balance flow into the mold cavity.
대표청구항
▼
What is claimed is: 1. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel in fluid communication with the nozzle melt channel, the first melt channel having a first melt channel
What is claimed is: 1. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel in fluid communication with the nozzle melt channel, the first melt channel having a first melt channel longitudinal axis, and a second melt channel in fluid communication with the first melt channel and having a second melt channel longitudinal axis that is substantially normal with respect to the first melt channel longitudinal axis; a retaining device that positions the nozzle tip with respect to the nozzle body; and an annular melt channel formed between the nozzle tip and the retaining device, wherein a first portion of the annular melt channel comprises a decompression chamber and a second portion of the annular melt channel comprises a compression chamber downstream of the decompression chamber and wherein an outlet of the nozzle tip second melt channel is in direct fluid communication with the decompression chamber of the annular channel. 2. The nozzle of claim 1, wherein there are between three and six of the nozzle tip second melt channels. 3. The nozzle of claim 1, wherein the second melt channel comprises one of a bore and a hole. 4. The nozzle of claim 1, wherein an area between the nozzle tip and a mold gate is devoid of a bubble area. 5. The nozzle of claim 1, wherein the nozzle tip is made from a thermally conductive material. 6. The nozzle of claim 1, wherein the nozzle tip comprises a first section made from a thermally conductive material and a second section made from a thermally insulative material. 7. The nozzle of claim 6, wherein the thermally conductive material comprises one of a copper-based material and a steel-based material. 8. The nozzle of claim 6, wherein the thermally insulative material comprises a titanium-based material. 9. The nozzle of claim 1, wherein the retaining device comprises: a retaining portion that positions the tip with respect to the nozzle body; and a sealing portion that insulates the tip from a mold plate. 10. The nozzle of claim 9, wherein the sealing portion touches the mold plate. 11. The nozzle of claim 1, wherein the retaining device is made from at least one of steel, titanium, and ceramic. 12. The nozzle of claim 1, wherein the annular melt channel includes: the decompression chamber having a first inner diameter, and the compression chamber having a second inner diameter, wherein the second inner diameter is larger than the first inner diameter for at least a portion of the compression chamber. 13. The nozzle of claim 1, wherein the nozzle tip comprises a first section made from a thermally conductive material and a second section made from a wear resistant material. 14. An injection molding apparatus, comprising: a manifold having at least one manifold melt channel therethrough; at least one nozzle having a nozzle body including a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel in fluid communication with the nozzle melt channel, the first melt channel having a first melt channel longitudinal axis, and a plurality of second melt channels in fluid communication with the first melt channel wherein each second melt channel has a second melt channel longitudinal axis that is substantially normal with respect to the first melt channel longitudinal axis; a retaining device that positions the nozzle tip with respect to the nozzle body; and an annular melt channel formed between the nozzle tip and the retaining device, wherein the annular melt channel includes a decompression chamber in fluid communication with the outlets of the plurality of second melt channels and a compression chamber downstream of and in fluid communication with the decompression chamber. 15. The injection molding apparatus of claim 14, wherein there are between three and six of the nozzle tip second melt channels. 16. The injection molding apparatus of claim 14, wherein the second melt channel comprise one of a bore and a hole. 17. The injection molding apparatus of claim 14, wherein an area between the nozzle tip and a mold cavity is devoid of a bubble area. 18. The injection molding apparatus of claim 14, wherein the nozzle tip is made from a thermally conductive material. 19. The injection molding apparatus of claim 14, wherein the nozzle tip comprises a first portion made from a thermally conductive material and a second portion made from a thermally insulative material. 20. The injection molding apparatus of claim 19, wherein the thermally conductive material comprises one of a copper-based material and a steel-based material. 21. The injection molding apparatus of claim 19, wherein the thermally insulative material comprises a titanium-based material. 22. The injection molding apparatus of claim 14, wherein the retaining device comprises: a retaining portion that retains the nozzle tip with respect to the nozzle body; and a sealing portion that insulates the nozzle tip from a mold plate. 23. The injection molding apparatus of claim 22, wherein the sealing portion touches the mold plate. 24. The injection molding apparatus of claim 14, wherein the retaining device comprises one of steel, titanium, and ceramic. 25. The nozzle of claim 14, wherein the annular melt channel includes: the decompression chamber having a first inner diameter, and the compression chamber having a second inner diameter, wherein the second inner diameter is larger than the first inner diameter for at least a portion of the compression chamber. 26. The nozzle of claim 14, wherein the nozzle tip comprises a first section made from a thermally conductive material and a second section made from a wear resistant material. 27. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel; a nozzle tip, including a first melt channel partially in fluid communication with the nozzle melt channel, the first melt channel having a first melt channel central axis, a release melt channel in fluid communication with the first melt channel, the release melt channel having a release melt channel central axis, wherein the release melt channel central axis is substantially normal with respect to the first melt channel central axis, and a downstream portion having an outer surface area extending proximate to and below an outlet of the release melt channel; a retaining device that retains the nozzle tip to the nozzle body and contacts a mold plate to provide a seal between the nozzle and the mold plate, the retaining device having a downstream portion having an inner surface area proximate to and below the outlet of the release melt channel; and an annular melt channel formed between the outer surface of the downstream portion of the nozzle tip and the inner surface of the downstream portion of the retaining device, wherein the annular melt channel includes a decompression chamber in fluid communication with an outlet of the release melt channel and a compression chamber in fluid communication with the decompression chamber. 28. The nozzle of claim 27, wherein an outer wall of the retaining device includes threads for engaging complementary threads on an inner wall of the nozzle body. 29. The nozzle of claim 27, wherein there are between three and six of the nozzle tip release channels. 30. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel fluid communication with the nozzle melt channel, the first melt channel having a first melt channel longitudinal axis, and a plurality of second melt channels in fluid communication with the first melt channel and each having a second melt channel longitudinal axis that is substantially normal with respect to the first melt channel longitudinal axis, wherein at least one of the outlets of the second melt channels is upstream of at least one other of the outlets of the second melt channels; a retaining device that positions the nozzle tip with respect to the nozzle body; and an annular melt channel formed between the nozzle tip and the retaining device, wherein the annular melt channel includes a decompression chamber in fluid communication with each of the outlets of the second melt channels and a compression chamber in fluid communication with the decompression chamber. 31. The nozzle of claim 30, wherein the retaining device is a nozzle tip retainer having a retaining portion that retains the nozzle tip with respect to the nozzle body and a sealing portion that insulates the nozzle tip from a mold cavity plate. 32. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel in fluid communication with the nozzle melt channel, the first melt channel having a first melt having a first melt channel longitudinal axis, and a plurality of second melt channels in fluid communication with the first melt channel and each having a second melt channel longitudinal axis that is at an angle with respect to the first melt channel longitudinal axis; a retaining device that positions the nozzle tip with respect to the nozzle body; and an annular melt channel formed between the nozzle tip and the retaining device, wherein the annular melt channel includes a decompression chamber in fluid communication with each of the outlets of the second melt channels and a compression chamber in downstream fluid communication with the decompression chamber and wherein the decompression chamber has a first inner diameter and the compression chamber has a second inner diameter that is larger than the first inner diameter of the decompression chamber for at least a portion of the compression chamber. 33. The nozzle of claim 32, wherein the retaining device is a nozzle tip retainer having a retaining portion that retains the nozzle tip with respect to the nozzle body and a sealing portion that insulates the nozzle tip from a mold cavity plate. 34. The nozzle of claim 32, wherein an outer diameter of the annular channel is constant within the decompression chamber and for at least the portion of the compression chamber. 35. The nozzle of claim 32, wherein each of the second melt channel longitudinal axis is substantially normal with respect to the first melt channel longitudinal axis. 36. A nozzle for an injection molding apparatus, comprising: a nozzle body having a nozzle melt channel with a longitudinal axis; a nozzle tip, including, a first melt channel in fluid communication with the nozzle melt channel, the first melt channel having a first melt channel longitudinal axis, a plurality of second melt channels in fluid communication with the first melt channel and each having a second melt channel longitudinal axis that is at an angle with respect to the first melt channel longitudinal axis, and a downstream portion including a first length with a first outer diameter and a second length having a second outer diameter, wherein the second outer diameter is larger than the first outer diameter; a retaining device that positions the nozzle tip with respect to the nozzle body, the retaining device having a downstream portion in opposition with the downstream portion of the nozzle tip, wherein the downstream portion of the retaining device includes an inner diameter that is constant for at least a length that corresponds to the first and second lengths of the downstream portion of the nozzle tip; and an annular melt channel formed between the downstream portion of the nozzle tip and the downstream portion of the retaining device, wherein the first length of the downstream portion of the nozzle tip is within a decompression chamber of the annular melt channel and the second length of the downstream portion of the nozzle tip is within a compression chamber of the annular melt channel that is in downstream fluid communication with the decompression chamber. 37. The nozzle of claim 36, wherein the retaining device is a nozzle tip retainer having a retaining portion that remains the nozzle tip with respect to the nozzle body and a sealing portion that insulates the nozzle tip from a mold cavity plate. 38. The nozzle of claim 36, wherein each of the second melt channel longitudinal axis is substantially normal with respect to the first melt channel longitudinal axis.
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