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GB854902A - Improvements in or relating to injection and other like moulding machines - Google Patents

Improvements in or relating to injection and other like moulding machines

Info

Publication number
GB854902A
GB854902A GB2421556A GB2421556A GB854902A GB 854902 A GB854902 A GB 854902A GB 2421556 A GB2421556 A GB 2421556A GB 2421556 A GB2421556 A GB 2421556A GB 854902 A GB854902 A GB 854902A
Authority
GB
United Kingdom
Prior art keywords
guard
platen
wire
injection
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.)
Expired
Application number
GB2421556A
Inventor
Emeric Gaspar
George Kurt Swinbourne
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.)
GEORGE KURT SWINBOURNE
Projectile & Engineering Compa
Original Assignee
GEORGE KURT SWINBOURNE
Projectile & Engineering Compa
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 GEORGE KURT SWINBOURNE, Projectile & Engineering Compa filed Critical GEORGE KURT SWINBOURNE
Priority to GB2421556A priority Critical patent/GB854902A/en
Publication of GB854902A publication Critical patent/GB854902A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F16P3/08—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 in connection with the locking of doors, covers, guards, or like members giving access to moving machine parts
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

854,902. Machinery guards. PROJECTILE & ENGINEERING CO. Ltd., GASPAR, E., and SWINBOURNE, G. K. Aug. 7, 1957; [Aug. 7, 1956], No. 24215/56. Class 80 (4). In an injection moulding or like machine, wherein a guard 17 is horizontally movable on bars 15, 16 by a piston-rod 22 of a fluidpressure system interlocked, by means not shown, with the movable platen 13 of the machine to ensure a sequential operation of the guard and platen, the guard 17 carries flexible means such as a trip wire 30 so that should the guard-closing be obstructed (e.g. by an operator's arm) the wire 30 is deflected and actuates means to stop the guard. As shown, the wire 30 extends between a bracket 31 and a spring- loaded lever 27 carrying a pawl engageable with a fixed rack 25. In a modification the lower end of the wire 30 is attached to a friction clip, Fig. 2 (not shown), holding a pawl suspended above a fixed rack, deflection of the wire causing the' clip to open and drop the pawl into engagement with the rack. In a further modification the trip-wire 30 is connected to a switch or valve controlling the guard-closing cylinder 23. The cylinder 23 is controlled by a solenoid-operated valve 24. In the machine shown the platen 13 is moved by an hydraulic ram towards a fixed platen 14 provided with plasticizing and injection mechanism. Operation of a push-button causes closure of the guard 17 which when closed operates a valve to start the closure of the platen 13. In turn, the closing platen operates a valve to start the injection process. After injection, and if necessary after a time delay, the platen 13 and guard 17 commence to open, the guard movement being slowed by an air restriction so that the platen is fully open before the guard. When the guard is fully open it connects the pump of the platen hydraulic supply to exhaust.
GB2421556A 1956-08-07 1956-08-07 Improvements in or relating to injection and other like moulding machines Expired GB854902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2421556A GB854902A (en) 1956-08-07 1956-08-07 Improvements in or relating to injection and other like moulding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2421556A GB854902A (en) 1956-08-07 1956-08-07 Improvements in or relating to injection and other like moulding machines

Publications (1)

Publication Number Publication Date
GB854902A true GB854902A (en) 1960-11-23

Family

ID=10208203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2421556A Expired GB854902A (en) 1956-08-07 1956-08-07 Improvements in or relating to injection and other like moulding machines

Country Status (1)

Country Link
GB (1) GB854902A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386133A (en) * 1966-05-31 1968-06-04 Package Machinery Co Safety mechanism for plastic injection molding machine or the like
US3771936A (en) * 1971-05-12 1973-11-13 E Moslo Safety device for molding machine
US4162878A (en) * 1977-11-21 1979-07-31 Litton Industrial Products, Inc. Safety latch system
US4204822A (en) * 1977-08-24 1980-05-27 British Industrial Plastics Ltd. Moulding machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386133A (en) * 1966-05-31 1968-06-04 Package Machinery Co Safety mechanism for plastic injection molding machine or the like
US3771936A (en) * 1971-05-12 1973-11-13 E Moslo Safety device for molding machine
US4204822A (en) * 1977-08-24 1980-05-27 British Industrial Plastics Ltd. Moulding machine
US4162878A (en) * 1977-11-21 1979-07-31 Litton Industrial Products, Inc. Safety latch system

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