Patent US3744949A successfully refreshed from Google Patents.
US3744949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking unit for the casing mold of an injection molding
Assignee: Individual
•
Filing: 1971-04-06
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Granted: 1973-07-10
•
Expires: 1991-04-06
Abstract
Abstract A clamping unit for clamping the mold of an injection molding machine has at least one removable protective cover for covering the clamping unit in the area of the mold. The cover has at least three protective cover plates arranged to be moved independently of one another in the opening direction of the clamping unit between an open position and a protective position. Switches and a safety valve are associated with the cover for interrupting the main current and fluid flows of the injection molding machine when all of the cover plates are in their open position.
Inventors
- 👤 K Hehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:58
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/84; Y; Y10; Y10S; Y10S425/00; Y10S425/045
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
383 words
In a clamping unit for clamping a mold of an injection molding machine and having two side surfaces and a top surface, the unit including a stationary mold clamping plate and a movable mold clamping plate movable in an opening direction away from the stationary mold clamping plate to define thereby an open position of the clamping unit, the improvement comprising: at least one removable protective cover means for covering the clamping unit in the area of the mold and having a stationary protective hood mounted to the clamping unit so that it covers said movable mold clamping plate when said movable mold clamping plate is in said open position; first, second, and third protective cover plates arranged to be moved in the opening direction of the movable mold clamping plate between a protective position and an open position; a fluid piston and cylinder connected at one end to said stationary Mold clamping plate and at the other end to said first cover plate for moving said first cover plate; and means associated with said cover means for interrupting the operation of the injection molding machine when said first cover plate is in the open position, wherein said first cover plate is vertically oriented and covers one of said side surfaces, said second cover plate covers the other of said side surfaces and said third cover plate covers said top surface, said third cover plate having projection means for engaging said first cover plate for retaining said third cover plate in said protective position when said first cover plate is in said protective position, said second cover plate having projection means for engaging said third cover plate for retaining said second cover plate in said protective position when said third dover plate is in said protective position, and said second and third cover plates each have a cut-out area through which access is provided to said mold when said second and third cover plates are in said protective position, and wherein the improvement further comprises a slide panel for each of said second and third cover plates, with each of said slide panels being mounted to its respective cover plate to normally cover said corresponding cut-out and for slidable movement relative to its respective cover plate to provide such access to said mold.
Claim 2
Dependent Claim
383 words
In a clamping unit for clamping a mold of an injection molding machine and having two side surfaces and a top surface, the unit including a stationary mold clamping plate and a movable mold clamping plate movable in an opening direction away from the stationary mold clamping plate to define thereby an open position of the clamping unit, the improvement comprising: at least one removable protective cover means for covering the clamping unit in the area of the mold and having a stationary protective hood mounted to the clamping unit so that it covers said movable mold clamping plate when said movable mold clamping plate is in said open position; first, second, and third protective cover plates arranged to be moved in the opening direction of the movable mold clamping plate between a protective position and an open position; a fluid piston and cylinder connected at one end to said stationary Mold clamping plate and at the other end to said first cover plate for moving said first cover plate; and means associated with said cover means for interrupting the operation of the injection molding machine when said first cover plate is in the open position, wherein said first cover plate is vertically oriented and covers one of said side surfaces, said second cover plate covers the other of said side surfaces and said third cover plate covers said top surface, said third cover plate having projection means for engaging said first cover plate for retaining said third cover plate in said protective position when said first cover plate is in said protective position, said second cover plate having projection means for engaging said third cover plate for retaining said second cover plate in said protective position when said third dover plate is in said protective position, and said second and third cover plates each have a cut-out area through which access is provided to said mold when said second and third cover plates are in said protective position, and wherein the improvement further comprises a slide panel for each of said second and third cover plates, with each of said slide panels being mounted to its respective cover plate to normally cover said corresponding cut-out and for slidable movement relative to its respective cover plate to provide such access to said mold.
Claim 3
Dependent Claim
20 words
The clamping unit defined in claim 1, wherein said cover plates are arranged to be moved independently of one another.
Claim 4
Dependent Claim
15 words
The clamping unit defined in claim 2, wherein said interrupting means has an electrical device.
Claim 5
Dependent Claim
31 words
The clamping unit defined in claim 1, wherein said interrupting means interrupts the main current flow of the injection molding machine when said first cover plate is in the open position.
Claim 6
Dependent Claim
30 words
The clamping unit defined in claim 1, wherein said interrupting means interrupts the fluid flow of the injection molding machine when said first cover plate is in the open position.
Claim 7
Dependent Claim
55 words
The clamping unit defined in claim 1, wherein said cover means has guide rods arranged in three pairs and a pair of rollers rotatably mounted on each of said cover plates and arranged to coact with a respective one of the pairs of guide rods for movably mounting the cover plates on the guide rods.
Claim 8
Dependent Claim
27 words
The clamping unit defined in claim 6, wherein said stationary protective hood has a U-shaped cross section, with said guide rods being connected to said protective hood.
Claim 9
Dependent Claim
23 words
The clamping unit defined in claim 7, wherein said guide rods are hollow rods for permitting electrical and fluid lines to pass therethrough.
Claim 10
Dependent Claim
87 words
The clamping unit defined in claim 8, wherein the mold has a parting line in its center region, and wherein said cut-out areas are dimensioned to provide access to the center region of the mold when their respective plates are in said protective position, and wherein each of said slide panels are dimensioned to cover the parting line and the center region of the mold and are arranged for movement with respect to their respective cover plate in the opening direction of the movable mold clamping plate.
Claim 11
Dependent Claim
21 words
The clamping unit defined in claim 9, further including arresting screw means for fixing said sliding panels in any desired position.
Claim 12
Dependent Claim
83 words
The clamping unit defined in claim 10, wherein said interrupting means includes a first switching rod mounted on said first cover plate and arranged to extend beyond said first cover plate into the area of said stationary clamping plate and oriented in the opening direction of said movable mold clamping plate, said first switching rod defining an inclined surface, and said interrupting means further includes means arranged to coact with said inclined surface for controlling a fluid circuit of the injection molding machine.
Claim 13
Dependent Claim
78 words
The clamping unit defined in claim 11, wherein said coacting means is a safety valve, and wherein said interrupting means further includes a second switching rod defining a plurality of inclined surfaces, and a pluralitY of microswitches having follower members arranged to coact with said inclined surfaces, said second switching rod actuating, through the engagement of one of said inclined surfaces with one of said followers, said microswitches for interrupting the main current flow of the clamping unit.
Claim 14
Dependent Claim
16 words
The clamping unit defined in claim 1, wherein said cover plates are connected to one another.
Claim 15
Dependent Claim
20 words
The clamping unit as defined in claim 13, wherein said cover plates are connected to one another by screw fasteners.
Claim 16
Dependent Claim
21 words
The clamping unit as defined in claim 14, wherein said cover plates are partially connected to one another by a weld.
References Cited (Backward Citations)
US2415462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |