GB688668A - Improvements in or relating to a hydraulic drive, such as may particularly be applied to die and press moulding machines - Google Patents

Improvements in or relating to a hydraulic drive, such as may particularly be applied to die and press moulding machines

Info

Publication number
GB688668A
GB688668A GB7521/51A GB752151A GB688668A GB 688668 A GB688668 A GB 688668A GB 7521/51 A GB7521/51 A GB 7521/51A GB 752151 A GB752151 A GB 752151A GB 688668 A GB688668 A GB 688668A
Authority
GB
United Kingdom
Prior art keywords
pipe
piston
valve
space
fluid
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
GB7521/51A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB688668A publication Critical patent/GB688668A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/82Hydraulic or pneumatic circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16Control arrangements for fluid-driven presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16Control arrangements for fluid-driven presses
    • B30B15/163Control arrangements for fluid-driven presses for accumulator-driven presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/82Hydraulic or pneumatic circuits
    • B29C2045/824Accumulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

688,668. Injection moulding machines. SAUTER, H., and HAHN, W., (trading as HAHN & KOLB (Firm of)). April 2, 1951 [April 12, 1950], No. 7521/51. Class 87 (ii). [Also in Group XXIX] In a hydraulic drive for machines having a hydraulic driving network 13, 11, 14, 12, 8 common to a pair, or a plurality of pairs, of cooperating cylinders 1, 21 and pistons 2, 22, one (21) of each pair of cylinders and its piston (22) is connected with a pressure accumulator 20 and with the common driving network in such a manner that, in one stroke direction, the piston 22 is relieved from the driving network and is driven by the accumulator and, in the other stroke direction, the piston 22 is driven directly from the driving network, the working movement of the piston 22 being unable to exert any influence over the pressure upon the remaining piston(s) 2. Fluid in a container 10 is drawn through a pipe 13 by a low pressure pump 11 and delivered into a pipe 14 connected to both a non-return valve 18 and a high pressure pump, 12 ; the valve 18 controls a pipe 8 leading to both a valve 5, and a non-return valve 19 in a pipe 15 leading to a valve 25. The valve 5 controls the supply to the piston 2 to which is connected the movable mould half 41 of a die moulding machine, which half carries a piston 39 controlling the movement of the core and an ejector piston 42, these pistons 39, 42, being connected to the hydraulic network. The valve 25 supplies the piston 22 to which is connected an injecting piston 33 projecting into an injection cylinder 34 leading to the cavity 37 in the fixed half 40 of the mould. A mass for moulding is delivered to the cylinder 34 from a tank 35 via a distributing device 36. With the control valves 5, 25 in the positions shown, pressure fluid is supplied via a pipe 7 to the space 4 in the cylinder 1, fluid in the space 3 being exhausted via pipe 6, valve 5 and pipe 9, and the piston 2 moves to close the mould 41, 40. At the same time fluid flows through a pipe 26 into the space 23 in the cylinder 21 to retract the piston 22, fluid in the space 24 being forced through a throttle valve 32 into a pipe 27 to charge the accumulator 20. When the mould 41-40 is closed, pressure builds up in the space 4 and is maintained by the high pressure pump 12. Reversal of the control valve 25 blocks the pipe 26 and cylinder 21 from the driving network and connects them to the exhaust pipe 29. Fluid then flows into the space 24 from the accumulator 20 and the piston 22 moves the injecting piston 33 into the injecting cylinder 34. Reversal of the valve 5 connects the pipe 7 to the exhaust pipe 9' and the pipe 6 with the supply pipe 8 so that fluid enters the space 3 to retract the piston 2. A normally closed valve 30 may be opened e.g. automatically, to charge the accumulator 20 from the pipe 15, and a normally closed valve 31 may be opened to reduce the pressure in the accumulator.
GB7521/51A 1950-04-12 1951-04-02 Improvements in or relating to a hydraulic drive, such as may particularly be applied to die and press moulding machines Expired GB688668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE688668X 1950-04-12

Publications (1)

Publication Number Publication Date
GB688668A true GB688668A (en) 1953-03-11

Family

ID=6598540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7521/51A Expired GB688668A (en) 1950-04-12 1951-04-02 Improvements in or relating to a hydraulic drive, such as may particularly be applied to die and press moulding machines

Country Status (1)

Country Link
GB (1) GB688668A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314533A1 (en) * 2001-11-14 2003-05-28 Sumitomo Heavy Industries, Ltd. Injection molding machine comprising an accumulator for hydraulic oil, and a control method for the injection molding machine
EP1321276A1 (en) * 2001-12-21 2003-06-25 Ferromatik Milacron Maschinenbau GmbH Injection moulding machine with hydraulic accumulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314533A1 (en) * 2001-11-14 2003-05-28 Sumitomo Heavy Industries, Ltd. Injection molding machine comprising an accumulator for hydraulic oil, and a control method for the injection molding machine
US7067078B2 (en) 2001-11-14 2006-06-27 Sumito Heavy Industries, Ltd. Injection molding machine having an accumulator and a control method for the injection molding machine
EP1321276A1 (en) * 2001-12-21 2003-06-25 Ferromatik Milacron Maschinenbau GmbH Injection moulding machine with hydraulic accumulator

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