FR2307215A1 - Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays open - Google Patents
Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays openInfo
- Publication number
- FR2307215A1 FR2307215A1 FR7511321A FR7511321A FR2307215A1 FR 2307215 A1 FR2307215 A1 FR 2307215A1 FR 7511321 A FR7511321 A FR 7511321A FR 7511321 A FR7511321 A FR 7511321A FR 2307215 A1 FR2307215 A1 FR 2307215A1
- Authority
- FR
- France
- Prior art keywords
- platen
- safety
- hydraulic
- depressure
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/84—Safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/02—Screens or other safety members moving in synchronism with members which move to and fro
- F16P3/04—Screens or other safety members moving in synchronism with members which move to and fro for machines with parts which approach one another during operation, e.g. for stamping presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The device comprises a rod part of which is toothed to engage a rachet mounted on the gate and part of which forms a plunger traversing a hydraulic valve. Under normal conditions the plunger is located by a thrust pin so that part of the valve chamber is obstructed to isolate two hydraulic connections to the valve. If the platen moves while the gate is open, the ratchet on the latter restraints the rod sufficiently to shear the pin. Subsequent motion of the valve body (on the platen) relative to the plunger connects the hydraulic connection to relieve the pressure on the platen traverse ram, thus halting the platen motion. Device is suitable for guarding daylights on injection moulding machines etc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7511321A FR2307215A1 (en) | 1975-04-11 | 1975-04-11 | Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays open |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7511321A FR2307215A1 (en) | 1975-04-11 | 1975-04-11 | Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays open |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2307215A1 true FR2307215A1 (en) | 1976-11-05 |
FR2307215B1 FR2307215B1 (en) | 1979-01-19 |
Family
ID=9153800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7511321A Granted FR2307215A1 (en) | 1975-04-11 | 1975-04-11 | Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays open |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2307215A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2461580A1 (en) * | 1979-07-21 | 1981-02-06 | Hehl Karl | MOLD CLOSURE GROUP WITH SECURITY DEVICE FOR INJECTION MOLDING MACHINE |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2587933A (en) * | 1946-07-01 | 1952-03-04 | Alexander S Volpin | Shear relief valve |
GB956814A (en) * | 1962-03-01 | 1964-04-29 | Highwood Engineering Company L | Improvements in or relating to diecasting and moulding machines |
-
1975
- 1975-04-11 FR FR7511321A patent/FR2307215A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2587933A (en) * | 1946-07-01 | 1952-03-04 | Alexander S Volpin | Shear relief valve |
GB956814A (en) * | 1962-03-01 | 1964-04-29 | Highwood Engineering Company L | Improvements in or relating to diecasting and moulding machines |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2461580A1 (en) * | 1979-07-21 | 1981-02-06 | Hehl Karl | MOLD CLOSURE GROUP WITH SECURITY DEVICE FOR INJECTION MOLDING MACHINE |
Also Published As
Publication number | Publication date |
---|---|
FR2307215B1 (en) | 1979-01-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |