Short shuttle molding system for multi-material molding
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-045/10
B29C-045/03
B29C-045/16
출원번호
US-0423292
(2003-04-25)
발명자
/ 주소
Tustin,Richard
Looije,Adrian
출원인 / 주소
Husky Injection Molding Systems Ltd.
인용정보
피인용 횟수 :
4인용 특허 :
8
초록▼
An apparatus and method for molding multi-material parts. The mold has a plurality of first mold cavities interspersed alternately among a plurality of second mold cavities. A first molten material is injected into the first mold cavities and solidified. Cores with the first material are moved only
An apparatus and method for molding multi-material parts. The mold has a plurality of first mold cavities interspersed alternately among a plurality of second mold cavities. A first molten material is injected into the first mold cavities and solidified. Cores with the first material are moved only one mold pitch to the second mold cavities where a second molten material is injected and solidified with the first material to form the multi-material parts which are ejected from the mold when it is opened. In one embodiment, cavities and cores are arranged in a column, and dummy cores on each end of a column of cores close off the injection nozzle in an end cavity from which a core has been removed for a molding cycle. In another embodiment, cavities and cores are arranged radially, and cores are rotationally moved one mold pitch with each molding cycle.
대표청구항▼
What is claimed is: 1. A method of injection molding multi-material parts, comprising the steps of: (a) injecting a first molten material into a portion of a plurality of first mold cavities interspersed alternately among a plurality of second mold cavities in a mold and solidifying the molten mate
What is claimed is: 1. A method of injection molding multi-material parts, comprising the steps of: (a) injecting a first molten material into a portion of a plurality of first mold cavities interspersed alternately among a plurality of second mold cavities in a mold and solidifying the molten material; (b) opening the mold and retaining the solidified material on a plurality of mold cores; (c) moving the mold cores with the solidified material to the second mold cavities and closing the mold; (d) injecting a second molten material into a portion of the second mold cavities and solidifying the molten material such that the first and second materials together form the multi-material part; (e) opening the mold and ejecting the multi-material parts; (f) preventing injection of molten material into a cavity from which a core have been moved; and (g) wherein the injection of molten material is prevented by installing a dummy core into at least one of the mold cavities from which at least one of the mold cores has been moved, the dummy core interfacing with an injection nozzle in the cavity to prevent the nozzle from injecting molten material during an injection cycle. 2. The method of claim 1, wherein the mold cores are moved one mold pitch for each molding cycle. 3. The method of claim 1, wherein the mold cores are moved a first direction for a molding cycle, and a second direction opposite said first direction for the next molding cycle. 4. The method of claim 3, wherein the first and second directions are oriented substantially vertical. 5. The method of claim 3, wherein the first and second directions are oriented substantially horizontal. 6. The method of claim 1, further comprising the step of preventing injection of molten material into at least one of the plurality of mold cavities from which at least one of the plurality of mold cores has been moved. 7. An injection molding apparatus, comprising: a plurality of mold cavities attached to a first plate, the cavities having either a first configuration or a second configuration for receiving and solidifying molten material, those of the first configuration being interspersed alternately among those of the second configuration; a plurality of mold cores attached to a second plate and arranged to mate with the plurality of mold cavities of both the first and second configurations, the mold cores being movable between a first position and a second position relative to the mold cavities such that the second position is transposed from the first position one mold pitch, the plurality of mold cores moving said solidified material formed in the first or second configuration to the plurality of mold cavities in the other of the first or second configuration; means for moving the mold cores relative to the mold cavities so that the cores are shuttled one mold pitch between each molding cycle; and at least one dummy core for precluding molten material from flowing into at least one of the mold cavities by installing the at least one cummy core into the mold cavity. 8. The apparatus of claim 7, wherein the mold cavities are arranged in a column having first and second end cavities at opposite ends of the column, each end cavity being of the second configuration. 9. The apparatus of claim 8, wherein the mold cores are arranged in a column having first and second dummy cores at opposite ends of the column such that with the cores in the first position the first dummy core aligns with the first end cavity, and with the cores in the second position the second dummy core aligns with the second end cavity. 10. The apparatus of claim 7, wherein the mold cores have ejector pins operating to only eject a part molded in a cavity of the second configuration. 11. An injection molding apparatus, comprising: a plurality of mold cavities attached to a first plate, the cavities having either a first configuration or a second configuration for receiving and solidifying molten material, those of the first configuration being interspersed alternately among those of the second configuration; a plurality of mold cores attached to a second plate and arranged to mate with the plurality of mold cavities of both the first and second configurations, the mold cores being movable between a first position and a second position relative to the mold cavities such that the second position is transposed from the first position one mold pitch, the plurality of mold cores moving said solidified material formed in the first or second configuration to the plurality of mold cavities in the other of the first or second configuration; means for moving the mold cores relative to the mold cavities so that the cores are shuttled one mold pitch between each molding cycle; wherein the mold cavities are arranged in a column having first and second end cavities at opposite ends of the column, each end cavity being of the second configuration; wherein the mold cores are arranged in a column having first and second dummy cores at opposite ends of the column such that with the cores in the first position the first dummy core aligns with the first end cavity, and with the cores in the second position the second dummy core aligns with the second end cavity; and wherein each mold cavity has an injection nozzle associated with it, the injection nozzle having an outlet into the mold cavity for injection of molten material, and wherein the outlet of the injection nozzle associated with an end cavity is closed by the dummy core aligned with the end cavity when the mold is closed to prevent injection of molten material into the end cavity. 12. An injection molding apparatus, comprising: a plurality of mold cavities of a second configuration for receiving and solidifying molten material and arranged in a column and attached to a first plate, the column having first and second end cavities at opposite ends of the column; a plurality of mold cavities of a first configuration for receiving and solidifying molten material and attached to the first plate and interspersed alternately among the mold cavities of the second configuration; a plurality of mold cores attached to a second plate and arranged in a column to mate with the plurality of mold cavities of both the first and second configurations, the mold cores being movable between a first position and a second position relative to the mold cavities such that the second position is transposed from the first position one mold pitch, the column of mold cores having a first dummy core and a second dummy core each at opposite ends of the column such that with the cores in the first position, the first dummy core aligns with the first end cavity, and with the cores in the second position the second dummy core aligns with the second end cavity, the plurality of mold cores not having either of the first or second dummy cores moving said solidified material formed in either the first or second configuration to the cavities of the other of the first or second configuration; and means for moving the mold cores relative to the mold cavities so that the cores are shuttled one mold core between each molding cycle.
Michinori Nishida JP, Method for manufacturing synthetic resin-made hollow member with intermediate element incorporated therein, and apparatus therefor.
Gasami Shinji (Hiroshima JPX) Nishida Shoso (Hiroshima JPX), Rotational injection molding machine having a plurality of combinations of male and female dies.
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