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 open

Info

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
Application number
FR7511321A
Other languages
French (fr)
Other versions
FR2307215B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giraud Gallaire SA Ets
Original Assignee
Giraud Gallaire SA Ets
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Giraud Gallaire SA Ets filed Critical Giraud Gallaire SA Ets
Priority to FR7511321A priority Critical patent/FR2307215A1/en
Publication of FR2307215A1 publication Critical patent/FR2307215A1/en
Application granted granted Critical
Publication of FR2307215B1 publication Critical patent/FR2307215B1/fr
Granted legal-status Critical Current

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.
FR7511321A 1975-04-11 1975-04-11 Safety catch for hydraulic platen closure system - to depressure the traverse ram if a safety gate stays open Granted FR2307215A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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