Patent US3932645A successfully refreshed from Google Patents.
Patent US3918864A successfully refreshed from Google Patents.
US3918864A
Expired / Lapsed
US
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Molding of synthetic plastic members onto a travelling elongated element
Assignee: Felten and Guilleaume Kabelwerke GmbH
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Filing: 1974-04-09
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Granted: 1975-11-11
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Expires: 1994-04-09
Abstract
Abstract A mold is closed about an elongated element at a receiving location, and synthetic plastic material is introduced into the mold to injection-mold a synthetic plastic member about the element within the mold. The mold with the elongated element is advanced in a circular path until the material of the synthetic plastic member has hardened, and thereupon the mold is opened at a discharging location. Both an apparatus and a method are disclosed.
Inventors
- 👤 Dieter Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:23
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; H01B13/18; H01B13/20; H01B13/202; B; B29; B29C; B29C45/00; B29C45/03; B29C45/04; B29C45/06; B29C45/14; B29C45/14549; B29C45/14565
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
330 words
Apparatus for molding synthetic plastic members onto a travelling elongated element, comprising mold means including a train of individual molds each having two mold sections; means mounting said molds for travel in a circular path so that said mold sections of each mold travel concurrently along a common plane at opposite sides thereof; means for displacing said mold sections relative to one another substantially normal to said common plane between retracted positions in which said mold sections are disengaged from, and extended positions in which said mold sections engage, the elongated element and define a molding cavity about a portion of the same, said displacing means including rail means situated along said circular path spaced from said common plane and having surfaces at varying distances from the latter, and follower means connected with the respective mold sections and operative for following said surfaces and for displacing said mold sections in dependence on the instantaneous distance of said surfaces from said common plane, said displacing means comprising a first and a second guide tube for the respective mold sections, said rail means comprising an upper and a lower pressure rail, and said follower means comprising a first and a second ram each for one of said mold sections, a first and a second pressure spring each acting upon one of said rams and guide tubes, and two pairs of rollers each engaging one of said rams and one of said pressure rails; and means for introducing hardenable synthetic plastic material into the respective molding cavity to harden therein and to form the member about said portion of the elongated element when said mold sections of a given mold define said molding cavity, and including a source of said material located centrally of said circular path, a plurality of conduits each communicating said source with one of said molding cavities, and means for controlling the passage of said material through the respective conduits and including valve means in each of said conduits.
Claim 2
Dependent Claim
330 words
Apparatus for molding synthetic plastic members onto a travelling elongated element, comprising mold means including a train of individual molds each having two mold sections; means mounting said molds for travel in a circular path so that said mold sections of each mold travel concurrently along a common plane at opposite sides thereof; means for displacing said mold sections relative to one another substantially normal to said common plane between retracted positions in which said mold sections are disengaged from, and extended positions in which said mold sections engage, the elongated element and define a molding cavity about a portion of the same, said displacing means including rail means situated along said circular path spaced from said common plane and having surfaces at varying distances from the latter, and follower means connected with the respective mold sections and operative for following said surfaces and for displacing said mold sections in dependence on the instantaneous distance of said surfaces from said common plane, said displacing means comprising a first and a second guide tube for the respective mold sections, said rail means comprising an upper and a lower pressure rail, and said follower means comprising a first and a second ram each for one of said mold sections, a first and a second pressure spring each acting upon one of said rams and guide tubes, and two pairs of rollers each engaging one of said rams and one of said pressure rails; and means for introducing hardenable synthetic plastic material into the respective molding cavity to harden therein and to form the member about said portion of the elongated element when said mold sections of a given mold define said molding cavity, and including a source of said material located centrally of said circular path, a plurality of conduits each communicating said source with one of said molding cavities, and means for controlling the passage of said material through the respective conduits and including valve means in each of said conduits.
Claim 3
Dependent Claim
32 words
Apparatus as defined in claim 1; further comprising a circular turntable having a circumferential marginal portion; and wherein said molds are mounted on said circumferential marginal portion circumferentially spaced about said turntable.
Claim 4
Dependent Claim
37 words
Apparatus as defined in claim 2, each of said molds comprising cooling tubes for each of said mold sections, as inlet in said lower mold section for synthetic plastic material, and a heating coil surrounding said inlet.
Claim 5
Dependent Claim
53 words
Apparatus as defined in claim 3; each of said ducts comprising a rigid metallic conduit connected with said inlet, a flexible metallic conduit connected with said source and said rigid metallic conduit, and a valve interposed in said ducts and operative for admitting synthetic plastic material into said mold during each molding operation.
Claim 6
Dependent Claim
45 words
Apparatus as defined in claim 4, said turntable having a hollow central shaft about which it rotates; said source comprising a pipe extending through said hollow shaft; and further comprising a cooling conduit also extending through said hollow shaft and connected with the respective molds.
Claim 7
Dependent Claim
220 words
Apparatus for molding synthetic plastic members onto a travelling elongated element, comprising mold means arranged for travel in a circular path and including a train of individual molds all arranged in a common plane which includes said path, each of said molds having an upper and a lower mold section; closing means for closing said mold means about an elongated element at a first location, so as to take the same along in said circular path, and including an upper and a lower guide tube for the respective mold sections, an upper and a lower ram each for one of said mold sections, an Upper and a lower pressure spring each acting upon one of said rams and guide tubes, an upper and a lower pressure rail, and two pairs of rollers each engaging one of said rams and one of said pressure rails; admitting means for admitting hardenable synthetic plastic material into said mold means to form therein a synthetic plastic member about said elongated element and including a source of synthetic plastic material, individual supply ducts connecting said mold with said source, and valve means in each of said supply ducts; and opening means for opening said mold means from about said element and member at a second location circumferentially spaced in said path from said first location.
Claim 8
Dependent Claim
220 words
Apparatus for molding synthetic plastic members onto a travelling elongated element, comprising mold means arranged for travel in a circular path and including a train of individual molds all arranged in a common plane which includes said path, each of said molds having an upper and a lower mold section; closing means for closing said mold means about an elongated element at a first location, so as to take the same along in said circular path, and including an upper and a lower guide tube for the respective mold sections, an upper and a lower ram each for one of said mold sections, an Upper and a lower pressure spring each acting upon one of said rams and guide tubes, an upper and a lower pressure rail, and two pairs of rollers each engaging one of said rams and one of said pressure rails; admitting means for admitting hardenable synthetic plastic material into said mold means to form therein a synthetic plastic member about said elongated element and including a source of synthetic plastic material, individual supply ducts connecting said mold with said source, and valve means in each of said supply ducts; and opening means for opening said mold means from about said element and member at a second location circumferentially spaced in said path from said first location.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |