Patent US4239476A successfully refreshed from Google Patents.
US4239476A
Expired / Lapsed
US
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Mold for producing moldings from a plastic compound
Assignee: Individual
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Filing: 1979-10-02
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Granted: 1980-12-16
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Expires: 1999-10-02
Abstract
Abstract An injection mold for nonrigid plastic has separate mold cavities disposed on opposite sides of an intermediate mold part and fed from a common feed passage in one of a pair of outer mold parts defining the mold cavities jointly with the intermediate mold part. The intermediate mold part is divided along a plane transverse to the opening direction of the mold and its two halves are connected in accordion fashion with one another and respective ones of the outer mold parts. An extractor is disposed in the dividing plane and extends through a feed cavity which communicates with the feed channel and from which runner channels extend to the mold cavities. The feed cavity ensures a simultaneous distribution of the plastic compound to the mold cavities at both sides of the intermediate mold part upon injection, and when the mold is opened, the extractor pulls the moldings out of the mold cavities.
Inventors
- 👤 Hans F. Somberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:48
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/38; B29C45/26; B29C45/32; B29C45/03; B29C45/04; B29C45/0408; B29C45/0416; B29C2045/0425
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
260 words
A mold for producing moldings from a plastic compound, comprising an intermediate mold part having two mold part members disposed side by side on a mold axis, a pair of outer mold parts on opposite sides of the intermediate mold part, each outer mold part defining a mold cavity jointly with the adjacent face of the adjacent mold part member, one of the outer mold parts having a feed channel for the plastic compound, means mounting the outer and intermediate mold parts for relative movement of the outer mold parts and the mold part members along the mold axis between a closed position in which confronting faces of the mold part members engage one another and each outer mold part engages the adjacent one of the mold part members and an open position in which the mold part members are spread apart from one another and from the outer mold parts, means on said confronting faces of the mold part members defining a feed cavity, which in the closed position of the mold communicates with the feed channel of said one outer mold part, and sections of runner channels extending from the feed cavity to the mold cavities, an extractor positioned centrally of the mold part members, the extractor in the closed position of the mold extending into the feed cavity so as to become surrounded by the plastic compound introduced into the mold through the feed channel, and means mounting the extractor for movement with respect to the mold part members in a direction parallel to the mold axis.
Claim 2
Dependent Claim
260 words
A mold for producing moldings from a plastic compound, comprising an intermediate mold part having two mold part members disposed side by side on a mold axis, a pair of outer mold parts on opposite sides of the intermediate mold part, each outer mold part defining a mold cavity jointly with the adjacent face of the adjacent mold part member, one of the outer mold parts having a feed channel for the plastic compound, means mounting the outer and intermediate mold parts for relative movement of the outer mold parts and the mold part members along the mold axis between a closed position in which confronting faces of the mold part members engage one another and each outer mold part engages the adjacent one of the mold part members and an open position in which the mold part members are spread apart from one another and from the outer mold parts, means on said confronting faces of the mold part members defining a feed cavity, which in the closed position of the mold communicates with the feed channel of said one outer mold part, and sections of runner channels extending from the feed cavity to the mold cavities, an extractor positioned centrally of the mold part members, the extractor in the closed position of the mold extending into the feed cavity so as to become surrounded by the plastic compound introduced into the mold through the feed channel, and means mounting the extractor for movement with respect to the mold part members in a direction parallel to the mold axis.
Claim 3
Dependent Claim
56 words
A mold according to claim 1, said mold part members being hingedly interconnected on a first hinge axis transverse to the mold axis and hingedly connected to respective ones of the outer mold parts on a pair of second hinge axes parallel to the first hinge axis but spaced from it transversely of the mold axis.
Claim 4
Dependent Claim
35 words
A mold according to claim 2, each of the connections coupling the mold part members to the outer mold parts comprising a hinge providing an abutment-limited lost-motion in a direction parallel to the mold axis.
Claim 5
Dependent Claim
27 words
A mold according to claim 3, said hinge being spring-biassed such that the lost-motion takes place under the action of the spring-bias during opening of the mold.
Claim 6
Dependent Claim
79 words
A mold according to claim 1, said extractor being a rod extending in cantilever fashion transversely of the mold axis from a support on the mold part members and slidably carrying an ejector, and said intermediate mold part including a linkage coupling the ejector to the mold part members and operative in response to opening of the mold to displace the ejector towards the free end of the rod from a position between the support and the feed cavity.
Claim 7
Dependent Claim
58 words
A mold according to claim 5, said linkage comprising at least two links, each link having one end thereof hingedly connected to the ejector on a common hinge axis and having the other end thereof hingedly connected to respective ones of the mold part members, confronting faces of the links forming portions of said sections of runner channels.
References Cited (Backward Citations)
US2571766A
Cited
US2876495A
Cited
US3843295A
Cited
US3892512A
Cited
US3989436A
Cited
US4181488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |