US3767341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blow moulding machine
Assignee: Rheinmetall Industrie AG
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Filing: 1971-04-08
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Granted: 1973-10-23
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Expires: 1991-04-08
Abstract
Abstract In a moulding machine having a blow moulding nozzle and a closing and opening frame for mould parts, each activated by a hydraulic cylinder, the cylinders being hydraulically connected in parallel and a centering device being provided for the moulded parts. The centering device is capable of indicating the position of at least one of the mould parts relative to its intended position in its closed state. Also, the centering device is capable of displacing each of the mould parts in the same direction as a function of such indicating position.
Inventors
- 👤 B Siebelhoff
- 👤 J Senel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:38
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/56; B29C49/5605; B29C49/48; B29C2049/4856; B29C2049/4862; B29C49/561
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
174 words
In a moulding machine having a blow moulding nozzle and a closing and opening frame for mould parts, each actuated by a hydraulic cylinder, said cylinders being hydraulically connected in parallel, a centering device being provided for said mould parts, said device having a member for indicating after arrival in the closed state of said mould parts the position of at least one of said mould parts relative to its intended position in the closed state, and said device having a positioning means for displacing said closed mould parts in the same direction toward the intended position in the closed state as a function of said indicated position, said positioning means including hydraulic synchronizing cylinders having movable pistons which are respectively coupled with those of said hydraulic cylinders, the cylinder cavities of each said sychronizing cylinder intercommunicating via respective hydraulic fluid balancing supply means for balancing the hydraulic pressure effecting closing movements of said mould parts, there being also means provided for pumping hydraulic fluid from one of said supply means to the other.
Claim 2
Dependent Claim
174 words
In a moulding machine having a blow moulding nozzle and a closing and opening frame for mould parts, each actuated by a hydraulic cylinder, said cylinders being hydraulically connected in parallel, a centering device being provided for said mould parts, said device having a member for indicating after arrival in the closed state of said mould parts the position of at least one of said mould parts relative to its intended position in the closed state, and said device having a positioning means for displacing said closed mould parts in the same direction toward the intended position in the closed state as a function of said indicated position, said positioning means including hydraulic synchronizing cylinders having movable pistons which are respectively coupled with those of said hydraulic cylinders, the cylinder cavities of each said sychronizing cylinder intercommunicating via respective hydraulic fluid balancing supply means for balancing the hydraulic pressure effecting closing movements of said mould parts, there being also means provided for pumping hydraulic fluid from one of said supply means to the other.
Claim 3
Dependent Claim
40 words
The machine according to claim 1 wherein means are provided for controlling said pumping means, said control means being associated with each of said mould parts and capable of being activated by movement of said nozzle during its lateral movement.
Claim 4
Dependent Claim
40 words
The machine according to claim 1 wherein said indicating member is so arranged as to generate an electrical control signal proportional to the movement of said nozzle during its lateral movement, and said indicating member being connected with said nozzle.
Claim 5
Dependent Claim
23 words
The machine according to claim 1 in which said indicating member is an electrical position detector connected to one of said mould parts.
Claim 6
Dependent Claim
41 words
The machine according to claim 1 in which there is provided an additional hydraulic pump having a pressure line and suction line selectively connectable to said balancing supply means by a control valve actuable under the control of said indicating member.
Claim 7
Dependent Claim
41 words
The machine according to claim 2 in which there is provided an additional hydraulic pump having a pressure line and suction line selectively connectable to said balancing supply means by a control valve actuable under the control of said indicating member.
Claim 8
Dependent Claim
41 words
The machine according to claim 3 in which there is provided an additional hydraulic pump having a pressure line and suction line selectively connectable to said balancing supply means by a control valve actuable under the control of said indicating member.
Claim 9
Dependent Claim
68 words
The machine according to claim 5 in which said pressure line is connected to each of said balancing supply means in parallel with said control valve via a pressure overload release device and non-return valves of low opening pressure, and in which said balancing supply means are connected to the tank of said additional pump in parallel to said control valve, via non-return valves of high opening pressure.
Claim 10
Dependent Claim
24 words
The machine according to claim 8 in which non-return valves for leakage losses are provided between said control valve and said balancing supply means.
Claim 11
Dependent Claim
51 words
The machine according to claim 6 in which said control valve possesses a blocked position and a pressure transmission position connectable to each respectively said balancing supply means, and in which a change-over of said control valve into the transmission position is effected in response to actuation of said controlling means.
Claim 12
Dependent Claim
46 words
The machine according to claim 7 in which said indicating member is connectEd to said control valve and in which the volume of hydraulic fluid fed by said additional pump via said control valve is adjustable as a function of the magnitude of said control signal.
Claim 13
Dependent Claim
26 words
The machine according to claim 1 in which the piston surfaces of said hydraulic cylinders are about twice as large as those of said synchronizing cylinders.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |