US3655323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding die structure
Assignee: OASIS ELECTRONICS
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Filing: 1970-03-09
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Granted: 1972-04-11
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Expires: 1990-03-09
Abstract
Abstract A core to be used for injection molding of or the forming of molded or extruded cylinders whereas they have threaded or otherwise undercut internal surfaces, in which the core die is collapsible enough to allow the molded or extruded part to be ejected from die. The walls of the core are not hinged but are formed from two sleeves which are slotted to form tines or springy segments, all of which are solidly paired together at one end. The segments are locked in place by means of a cam. The cam holds the segments so as to form an extremely solid die wall.
Inventors
- 👤 Leland V Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:33
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/2618; B29C33/00; B29C33/44; B29C33/48; B29C33/485; B29C45/40; B29C45/44; B29C45/4421; B29D; B29D1/00; B29L; B29L2023/00; B29L2023/20; Y; Y10; Y10S; Y10S425/00; Y10S425/014; Y10S425/058; Y10S425/218
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
280 words
In a molding structure, a mold having a generally cylindrical molding cavity open at one end thereof, an adapter plate movable relative to the mold between a closed position closing said end of the cavity and an open position, the adapter plate having a bore therethrough aligned with the molding cavity when the adapter plate is in the closed position thereof, a mounting tube aligned with the bore and having a flanged end secured to the adapter plate and an outer end spaced from the mold, a first core sleeve having an outer end portion secured to the outer end of the tube and extending through the tube and the bore into the molding cavity, the portions of the first core sleeve in the cavity, the opening and portions adjacent thereto being slotted longitudinally to define tines movable between outer positions forming portions of a cylinder to inner positions spaced radially inwardly from the outer positions thereof, a second core sleeve having an outer end portion mounted in the outer end portion of the first core sleeve and extending along the first core sleeve, the other end portion of the second core sleeve being slotted longitudinally to define tines movable between outer positions between the tines of the first core sleeve when in the outer positions thereof and inner positions spaced inwardly from the tines of the first core sleeve when in the inner positions thereof, and a cam having a shank portion journaled in the second core sleeve and having lobes movable, when the cam is rotated, from positions pushing the tines to the outer positions thereof to positions permitting movement of the tines to the inner positions thereof.
Claim 2
Dependent Claim
280 words
In a molding structure, a mold having a generally cylindrical molding cavity open at one end thereof, an adapter plate movable relative to the mold between a closed position closing said end of the cavity and an open position, the adapter plate having a bore therethrough aligned with the molding cavity when the adapter plate is in the closed position thereof, a mounting tube aligned with the bore and having a flanged end secured to the adapter plate and an outer end spaced from the mold, a first core sleeve having an outer end portion secured to the outer end of the tube and extending through the tube and the bore into the molding cavity, the portions of the first core sleeve in the cavity, the opening and portions adjacent thereto being slotted longitudinally to define tines movable between outer positions forming portions of a cylinder to inner positions spaced radially inwardly from the outer positions thereof, a second core sleeve having an outer end portion mounted in the outer end portion of the first core sleeve and extending along the first core sleeve, the other end portion of the second core sleeve being slotted longitudinally to define tines movable between outer positions between the tines of the first core sleeve when in the outer positions thereof and inner positions spaced inwardly from the tines of the first core sleeve when in the inner positions thereof, and a cam having a shank portion journaled in the second core sleeve and having lobes movable, when the cam is rotated, from positions pushing the tines to the outer positions thereof to positions permitting movement of the tines to the inner positions thereof.
Claim 3
Dependent Claim
56 words
The molding structure of claim 1 including a second cam mounted on the shank portion, lever means pivotally mounted on the mounting tube and operable by the second cam when the second cam is rotated, and actuators carried by the lever means for moving the tines from the outer positions thereof to the inner positions thereof.
Claim 4
Dependent Claim
180 words
In a collapsible molding core, a plurality of first elongated core segments mounted in a circle in spaced apart positions and movable between outer positions and inner positions, a plurality of second elongated core segments, means mounting the second elongated core segments for movement from outer positions between the first elongated core segments to form a hollow core therewith when the first elongated core segments are in the outer positions thereof and inner positions spaced inwardly from the first elongated core segments when the first elongated core segments are in the inner positions thereof, and means for moving the second elongated core segments between the inner and outer positions thereof, the moving means including inner pressing means for moVing the core segments to the outer positions thereof and outer pressing means for moving the core segments to the inner portions thereof, the outer pressing means including a plurality of levers, a plurality of adjustment screws on the levers and cam means for swinging the levers to press the adjustment screws against the core segments to press the core segments inwardly.
Claim 5
Dependent Claim
180 words
In a collapsible molding core, a plurality of first elongated core segments mounted in a circle in spaced apart positions and movable between outer positions and inner positions, a plurality of second elongated core segments, means mounting the second elongated core segments for movement from outer positions between the first elongated core segments to form a hollow core therewith when the first elongated core segments are in the outer positions thereof and inner positions spaced inwardly from the first elongated core segments when the first elongated core segments are in the inner positions thereof, and means for moving the second elongated core segments between the inner and outer positions thereof, the moving means including inner pressing means for moVing the core segments to the outer positions thereof and outer pressing means for moving the core segments to the inner portions thereof, the outer pressing means including a plurality of levers, a plurality of adjustment screws on the levers and cam means for swinging the levers to press the adjustment screws against the core segments to press the core segments inwardly.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |