US3574894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic resin injection molding machine
Assignee: Individual
•
Filing: 1969-05-27
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Granted: 1971-04-13
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Expires: 1989-05-27
Abstract
Abstract A rotary injection molding machine characterized in that a pair of vertically spaced apart, but unitary connected rotary discs are intermittently rotatably carried by a main shaft of a frame, a plurality pairs of molds are disposed between said pair of rotary discs in equiangularly spaced apart relation with each other in such a manner that they may be opened or closed; and a hydraulic mold opening and closing means for opening and closing one pair of said molds in the vertical direction when it is held in a stationary position is disposed at one portion of an annular track provided upon said frame.
Inventors
- 👤 Katashi Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:58
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/03; B29C45/04; B29C45/06; B29C2045/067
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An injecTion molding machine as defined in claim 1 characterized in that openings for mounting upper molds are formed in the upper rotary disc in opposed relation to the lower molds arranged upon said lower rotary disc; and upper mold supporting plates being disposed so as to close said openings are vertically movably mounted in such a manner that each of said upper mold supporting plates may be normally biased downwardly by coil springs fitted to said upper rotary disc.
Claim 2
Dependent Claim
76 words
An injection molding machine as defined in claim 2, characterized in that a mold backing plate which also serves as a support for said main shaft is joined to a pair of tie bars extending from said frame in parallel with said main shaft; and a hydraulic cylinder means is disposed in said frame in opposed relation with said backing plate with its mold clamping ram directed upwardly, whereby a pair of molds can be clamped.
Claim 3
Dependent Claim
69 words
An injection molding machine as defined in claim 3 inclusive characterized in that a nozzle at the top end of a heating cylinder of an injection device is directed toward said main shaft from the exterior of the molds between said backing plate and said mold clamping hydraulic cylinder and is made in contact with the parting line of said molds which is raised by said mold clamping ram.
Claim 4
Dependent Claim
60 words
An injection molding machine as defined in claim 4 inclusive characterized in that teeth having predetermined pitches are formed in the outer peripheral edge of said lower rotary disc so as to be in mesh with a toothed wheel carried by a drive shaft of a motor mounted upon said frame, whereby both of said rotary discs may be rotated.
Claim 5
Dependent Claim
39 words
An injection molding machine as defined in claim 4 inclusive characterized in that said main shaft is rotatably interconnected with a driving motor so that both of said rotary discs may be rotated as said main shaft is rotated.
Claim 6
Dependent Claim
58 words
An injection molding machine as defined in claim 6 inclusive characterized in that the upper mold of one pair of molds is securedly fixed to said upper mold supporting plate disposed upon said upper rotary disc while the lower mold of said molds, to the lower mold supporting plate fixed to the upper end of said supporting shaft.
References Cited (Backward Citations)
US3337920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |