IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0421154
(2006-05-31)
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등록번호 |
US-8851874
(2014-10-07)
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발명자
/ 주소 |
- Rawlings, Jaime J.
- Neidig, Scott
- Norris, Paul R.
|
출원인 / 주소 |
|
대리인 / 주소 |
Katten Muchin Rosenman LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
There is disclosed a mold comprising a first mold portion and a second mold portion engageable to define a mold cavity in a closed position of the mold. The first mold portion comprises a first part-line surface and the second mold portion comprises a second part-line surface. The first part-line su
There is disclosed a mold comprising a first mold portion and a second mold portion engageable to define a mold cavity in a closed position of the mold. The first mold portion comprises a first part-line surface and the second mold portion comprises a second part-line surface. The first part-line surface comprises a projection portion and the second part-line surface comprising a resilient portion for substantially sealing engagement with the projection portion in the closed position of the mold. The present mold allows for the production of a so-called “positive seal” between the two mold halves at the part-line of the mold, particularly in the areas of the part-line where there is no vent. This allows for production of a molded part having minimal or no flash produced at the part-line of the mold.
대표청구항
▼
1. A mold comprising: a first mold portion and a second mold portion engageable to define a mold cavity in a closed position of the mold, the first mold portion comprising a first part-line surface and the second mold portion comprising a second part-line surface,the first part-line surface comprisi
1. A mold comprising: a first mold portion and a second mold portion engageable to define a mold cavity in a closed position of the mold, the first mold portion comprising a first part-line surface and the second mold portion comprising a second part-line surface,the first part-line surface comprising a projection portion and the second part-line surface comprising a receptacle with a resilient portion therein, the resilient portion having a non-arched surface for substantially sealing engagement with the projection portion in the closed position of the mold,the projection portion configured to (i) extend below the surface of the second part-line surface in the closed position of the mold, and (ii) depress into the non-arched surface of the resilient portion in the closed position of the mold to cause the resilient portion to extend to the second part-line surface, but not to enter the mold cavity, the projecting portion having a wedge shape with an apex that is narrower than a width of the non-arched surface of the resilient portion. 2. The mold defined in claim 1, wherein the first mold portion comprises a bowl and the second mold portion comprises a lid. 3. The mold defined in claim 1, wherein the first mold portion comprises a lid and the second mold portion comprises a bowl. 4. The mold defined in claim 3, wherein the resilient portion comprises a material having a Shore D hardness of <30 as measured by ASTM 2240. 5. The mold defined in claim 3, wherein the resilient portion comprises a material having a Shore D hardness in the range of from about 10 to about 15 as measured by ASTM 2240. 6. The mold defined in claim 5, wherein the resilient portion is disposed so as to be below the second part-line surface. 7. The mold defined in claim 6, wherein the resilient portion occupies less than all of the receptacle. 8. The mold defined in claim 7, wherein the receptacle and the projection portion have different profiles. 9. The mold defined in claim 7, wherein the receptacle and the projection portion have substantially the same profile. 10. The mold defined in claim 9, wherein the receptacle comprises a U-shape. 11. The mold defined in claim 10, wherein the receptacle is interposed between a first flat portion and a second flat portion located on the second part-line surface. 12. The mold defined in claim 10, wherein the projection portion is interposed between a third flat portion and a fourth flat portion located on the first part-line surface. 13. The mold defined in claim 10, wherein the receptacle is interposed between a first flat portion and a second flat portion, and the projection portion is interposed between a third flat portion and a fourth flat portion. 14. The mold defined in claim 13, wherein the first flat portion and the third flat portion are interposed between the mold cavity and the receptacle. 15. The mold defined in claim 14, wherein a seal member is disposed between the first flat portion and the second flat portion. 16. The mold defined in claim 14, wherein a seal member is disposed on the first flat portion. 17. The mold defined in claim 14, wherein a seal member is disposed on the second flat portion. 18. The mold defined in claim 17, wherein the seal comprises a polymer material. 19. The mold defined in claim 17, wherein the seal comprises an epoxy polymer material. 20. The mold defined in claim 19, wherein the first flat portion and the second flat portion are aligned with respect to one another. 21. The mold defined in claim 19, wherein the first flat portion and the second flat portion are offset with respect to one another. 22. The mold defined in claim 19, wherein the third flat portion and the fourth flat portion are aligned with respect to one another. 23. The mold defined in claim 19, wherein the third flat portion and the fourth flat portion are offset with respect to one another. 24. The mold defined in claim 19, wherein the first flat portion and the second flat portion are offset with respect to one another, and the third flat portion and the fourth flat portion are offset with respect to one another. 25. The mold defined in claim 24, wherein the projection portion comprises a first apex and the receptacle comprises a second apex. 26. The mold defined in claim 25, wherein the projection portion is substantially symmetrical about a first axis passing through the first apex. 27. The mold defined in claim 25, wherein the resilient portion is substantially symmetrical about a second axis passing through the second apex. 28. The mold defined in claim 25, wherein the projection portion is substantially symmetrical about a first axis passing through the first apex, and the resilient portion is substantially symmetrical about a second axis passing through the second apex. 29. The mold defined in claim 28, wherein the first axis and second axis are coterminous. 30. The mold defined in claim 28, wherein the first axis and second axis are non-coterminous. 31. The mold defined in claim 25, wherein the first apex and the second apex are aligned substantially along a line orthogonal to a plane containing the first part-line surface. 32. The mold defined in claim 25, wherein the first apex and the second apex are aligned substantially along a line non-orthogonal to a plane containing the first part-line surface. 33. The mold defined in claim 32, wherein the resilient portion comprises a polymer. 34. The mold defined in claim 32, wherein the resilient portion comprises a silicon-containing material. 35. The mold defined in claim 32, wherein the resilient portion comprises a silicon-containing polymer. 36. The mold defined in claim 1, wherein, the first part-line surface and the second part-line surface combine in the closed position of the mold to define a mold part-line having a non-linear path from the mold cavity to an exterior of the mold. 37. The mold defined in claim 1, wherein the resilient portion has a substantially planar surface portion for substantially sealing engagement with the projection portion in the closed position of the mold. 38. The mold defined in claim 1, wherein the projecting portion has a non-flat engagement apex. 39. The mold defined in claim 1, wherein the resilient portion has an arched surface on a non-engagement side. 40. The mold defined in claim 1, wherein, in the closed position of the mold, the resilient portion does not extend above the surface of the second part-line. 41. The mold defined in claim 1, wherein the projecting portion wedge shape has a base portion substantially as wide as the a width of the non-arched surface of the resilient portion. 42. A mold comprising: a first mold portion and a second mold portion reversibly engageable between an open position and a closed position that defines a mold cavity, the first mold portion comprising a first part-line surface and the second mold portion comprising a second part-line surface,the first part-line surface comprising a projection portion and the second part-line surface comprising a receptacle having a resilient portion therein, the resilient portion comprising a non-arched surface;wherein: (i) in the open position of the mold, the receptacle comprises a first area occupied by the resilient portion and a second area unoccupied by the resilient portion adjacent the second part-line surface, (ii) in the closed position of the mold, at least a portion of the second area is occupied by the resilient portion, and (iii) in the closed position of the mold, the resilient portion extends to the surface of the second part-line, but does not enter the mold cavity, wherein the projecting portion has a wedge shape with an apex that is narrower than a width of the non-arched surface of the resilient portion. 43. The mold defined in claim 42, wherein the resilient portion has a substantially planar surface portion for substantially sealing engagement with the projection portion in the closed position of the mold. 44. The mold defined in claim 42, wherein the projecting portion has a non-flat engagement apex. 45. The mold defined in claim 42, wherein the resilient portion has an arched surface on a non-engagement side. 46. The mold defined in claim 42, wherein, in the closed position of the mold, the resilient portion does not extend above the surface of the second part-line. 47. The mold defined in claim 42, wherein the projecting portion wedge shape has a base portion substantially as wide as the a width of the non-arched surface of the resilient portion.
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