Single level manifold for an injection molding apparatus
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-045/22
출원번호
US-0781978
(2010-05-18)
등록번호
US-8241032
(2012-08-14)
발명자
/ 주소
Klobucar, Peter
Dewar, Neil
출원인 / 주소
Mold-Masters (2007) Limited
대리인 / 주소
Medler Ferro PLLC
인용정보
피인용 횟수 :
4인용 특허 :
15
초록▼
An injection molding apparatus is disclosed having a single level manifold that utilizes a melt splitter. The manifold defines an inlet and a plurality of outlets with at least one upstream melt channel and a plurality of downstream melt channels that are situated between the inlet and the plurality
An injection molding apparatus is disclosed having a single level manifold that utilizes a melt splitter. The manifold defines an inlet and a plurality of outlets with at least one upstream melt channel and a plurality of downstream melt channels that are situated between the inlet and the plurality of outlets. The upstream melt channel branches into the plurality of downstream melt channels with the upstream melt channel and each of the downstream melt channels longitudinally extending in the same plane. The melt splitter is at least partially positioned within the upstream melt channel where the upstream melt channel intersects with the plurality of downstream melt channels. The melt splitter divides a melt flow received from the upstream melt channel into substantially equal volumes and then directs each of the substantially equal volumes into a respective one of the plurality of downstream melt channels.
대표청구항▼
1. A manifold for an injection molding apparatus, comprising: a manifold defining: an inlet, wherein the inlet is in a first plane;an inlet channel extending from the inlet and having a downstream end in a second plane;a plurality of primary melt channels extending from the downstream end of the inl
1. A manifold for an injection molding apparatus, comprising: a manifold defining: an inlet, wherein the inlet is in a first plane;an inlet channel extending from the inlet and having a downstream end in a second plane;a plurality of primary melt channels extending from the downstream end of the inlet channel, wherein each of the plurality of primary melt channels extends in the second plane in a direction perpendicular to the inlet channel; anda plurality of secondary melt channels branching from a downstream end of at least one of the plurality of primary melt channels, wherein each of the plurality of secondary melt channels extends in the second plane; anda melt splitter positioned within the manifold, wherein the melt splitter includes a plurality of flow paths defined in an exterior surface of a body portion thereof, wherein each of the flow paths has a path inlet that is fluidly connected with the at least one of the plurality of primary melt channels and a path outlet that is fluidly connected to one of the plurality of secondary melt channels branching from the downstream end of the at least one of the plurality of primary melt channels. 2. The manifold of claim 1, wherein the at least one of the plurality of primary melt channels branches into four secondary melt channels such that the melt splitter has four flow paths. 3. The manifold of claim 2, wherein a first set of path outlets are aligned on a first side of the melt splitter to be in fluid communication with a first and second secondary melt channel and a second set of path outlets are aligned on a second side of the melt splitter, which is opposite from the first side of the melt splitter, to be in fluid communication with a third and fourth secondary melt channel. 4. The manifold of claim 2, wherein a first set of the flow paths is substantially straight with the path inlet and the path outlet aligned with a longitudinal axis of the melt splitter, and a second set of the flow paths curves around the melt splitter, such that the path inlet and the path outlet are not aligned with the longitudinal axis of the melt splitter. 5. The manifold of claim 1, wherein at least one of the plurality of secondary melt channels includes a bend of about 90-degrees, such that an outlet of the at least one of the plurality of secondary melt channels is in a third plane. 6. The manifold of claim 1, wherein the flow paths are recesses formed in the exterior surface of the melt splitter. 7. The manifold of claim 1, wherein the melt splitter is formed of tool steel. 8. The manifold of claim 1, wherein a width of at least one of the plurality of flow paths is greater than a width of one or more of the remaining flow paths so that a volume of melt flow through the at least one of the plurality of flow paths with the greater width is greater than a volume of melt flow through the one or more of the remaining flow paths. 9. The manifold of claim 1, wherein at least the path inlet portion of each of the flow paths is provided on an exterior surface of a conical tip at an inlet end of the body portion of the melt splitter. 10. An injection molding apparatus, comprising: a manifold having a plurality of melt channels for receiving a melt stream of moldable material from a melt source and directing the melt stream to outlets of the manifold, the manifold having an upstream melt channel for directing the melt stream to a plurality of downstream melt channels, wherein the upstream melt channel and the plurality of downstream melt channels are in the same plane; anda melt splitter disposed within the manifold to be at least partially positioned within the upstream melt channel and located where the upstream melt channel intersects with the plurality of downstream melt channels, wherein the melt splitter has a cylindrical body portion with a plurality of flow paths formed into an exterior surface thereof such that the plurality of flow paths divide the melt stream received from the upstream melt channel into a plurality of substantially equal volumes and direct each of the substantially equal volumes of the melt stream into a respective one of the plurality of downstream melt channels. 11. The injection molding apparatus of claim 10, wherein each of the flow paths is a recess with a path inlet and a path outlet such that when the melt splitter is positioned within the manifold, each of the path outlets aligns with a respective one of the downstream melt channels. 12. The injection molding apparatus of claim 11, wherein the upstream melt channel branches into four downstream melt channels and a first set of path outlets are aligned on a first side of the melt splitter to be in fluid communication with a first and second downstream melt channel and a second set of path outlets are aligned on a second side of the melt splitter, which is opposite from the first side of the melt splitter, to be in fluid communication with a third and fourth downstream melt channel. 13. The injection molding apparatus of claim 11, wherein a first set of the flow paths is substantially straight with the path inlet and the path outlet aligned with a longitudinal axis of the melt splitter, and a second set of the flow paths curves around the melt splitter, such that the path inlet and the path outlet are not aligned with the longitudinal axis of the melt splitter. 14. The injection molding apparatus of claim 10, wherein the melt splitter has a conical tip at an inlet end of the cylindrical body portion. 15. The injection molding apparatus of claim 14, wherein an upstream portion of each of the flow paths is provided on an exterior surface of the conical tip. 16. The injection molding apparatus of claim 10, wherein the melt splitter is inserted within a recess in the manifold that is a larger bore than a bore that forms the upstream melt channel. 17. The injection molding apparatus of claim 16, wherein a shoulder is formed in the manifold and the melt splitter includes a corresponding shoulder that sits against the shoulder of the manifold when the melt splitter is inserted within the recess. 18. The injection molding apparatus of claim 10, wherein the melt splitter is removably installed within the manifold. 19. The injection molding apparatus of claim 18, wherein thermal expansion of the melt splitter and manifold seals an interface therebetween. 20. The injection molding apparatus of claim 10, wherein the melt splitter is permanently installed within the manifold.
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이 특허에 인용된 특허 (15)
Jae Hong Choi ; Jerald L. Golmanavich ; Barry B. Hofmaster, Apparatus for multiple cavity injection molding.
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