Patent US3596325A successfully refreshed from Google Patents.
US3596325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold-clamping unit for synthetic material processing apparatus
Assignee: Individual
•
Filing: 1969-01-21
•
Granted: 1971-08-03
•
Expires: 1989-01-21
Abstract
Abstract Injection molding apparatus including an injection mold, a synthetic material injecting means and means for clamping two cooperating parts of such mold together. The clamping means is in the form of a formed cylinder block on which a part of the mold is disposed and which encloses the injecting means on at least three sides. The cylinder block has bores which form the cylinders for at least two hydraulic pressing means. Such pressing means serve to move the parts of the mold relative to each other, during a mold-pressing period, by being operably connected to at least one of the mold parts.
Inventors
- 👤 Karl Hehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:12
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/03; B29C45/07; B29C45/17; B29C45/64; B29C45/67; B29C45/6764; B29C45/6771; B29C45/10; Y; Y10; Y10S; Y10S425/00; Y10S425/223
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
23 words
Apparatus for injection molding as defined in claim 1, wherein apertures are provided in the tube walls between the pressing means cylinder bores.
Claim 2
Dependent Claim
71 words
at least two hydraulic pressing means for moving said first mold part with respect to said second mold part during a pressing period, each of said pressing means having a cylinder in the form of a bore provided in the walls of said tube, a piston disposed in said cylinder and a piston rod connected to said piston and to said supporting member on which said first mold part is disposed.
Claim 3
Dependent Claim
67 words
Apparatus for injection molding as defined in claim 2 wherein one of the ends of said tube is nearer the injection mold than the other and extensions protrude from each of said pressing means cylinders at the end of said tube further from said injection mold, each extension forming an end for its respective pressing means cylinder bore and a cover member provided at each such end.
Claim 4
Dependent Claim
35 words
Apparatus for injection molding as defined in claim 3 wherein the end of said tube facing said injection mold defines a clamping surface on which the second one of said two mold parts is disposed.
Claim 5
Dependent Claim
65 words
Apparatus for injection molding as defined in claim 4 further comprising at least two hydraulic driving means for rapidly moving said first mold part with respect to said second mold part during a mold driving period, said hydraulic driving means each including a driving cylinder having one end supported by said tube and another end connected to said supporting member for said first mold part.
Claim 6
Dependent Claim
40 words
Apparatus for injection molding as defined in claim 5 wherein each of said pressing means cylinder bores includes an annular shoulder provided at its end nearest said injection mold and an additional cover member arranged abuttingly against said annular shoulder.
Claim 7
Dependent Claim
34 words
Apparatus for injection molding as defined in claim 6 further comprising connecting elements disposed on at least one of said planar outer surfaces to which a further part of said apparatus can be connected.
Claim 8
Dependent Claim
59 words
Apparatus for injection molding as defined in claim 7 wherein said further part is an additional means for injecting synthetic materials into the parting plane of said mold parts and which includes a frame, said frame being mounted on said connecting elements for movement in the direction of said first mold part with respect to said second mold part.
Claim 9
Dependent Claim
36 words
Apparatus for injection molding as defined in claim 7 wherein said further part is a base member on which said tube is mounted and said connecting elements serve to guide said tube on said base member.
Claim 10
Dependent Claim
44 words
Apparatus for injection molding as defined in claim 9 wherein said base member includes an axle and supporting rods pivotably connected on said axle, said tube being axially displaceably mounted on said base member via said connecting elements being connected to said supporting rods.
Claim 11
Dependent Claim
43 words
Apparatus for injection molding as defined in claim 10 wherein said injecting means includes supporting struts and said tube includes additional bores provided therein for receiving said supporting struts, each of said supporting struts being coaxially inserted into one of said additional bores.
Claim 12
Dependent Claim
92 words
Apparatus for injection molding as defined in claim 11 wherein each of said hydraulic means pistons and cylinders together define two chambers, one on each side of said pistons, said chambers being connected with each other via at least one channel provided through each of said pistons, and a valve member disposed in each of said pistons associated with each said channel, said valve member bEing controlled to unblock, said channel during operation of said hydraulic driving means and being controlled to block said channel during operation of said hydraulic pressing means.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |