GB786248A - Improvements in or relating to die casting, injection moulding and other pressure machines - Google Patents

Improvements in or relating to die casting, injection moulding and other pressure machines

Info

Publication number
GB786248A
GB786248A GB667556A GB667556A GB786248A GB 786248 A GB786248 A GB 786248A GB 667556 A GB667556 A GB 667556A GB 667556 A GB667556 A GB 667556A GB 786248 A GB786248 A GB 786248A
Authority
GB
United Kingdom
Prior art keywords
die
parts
wedges
chamber
movable platen
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
GB667556A
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.)
Buehler AG
Original Assignee
Buehler AG
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
Priority to CH786248X priority Critical
Application filed by Buehler AG filed Critical Buehler AG
Publication of GB786248A publication Critical patent/GB786248A/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
    • B29C45/64Mould opening, closing or clamping devices
    • B29C45/68Mould opening, closing or clamping devices hydro-mechanical
    • B29C45/683Mould opening, closing or clamping devices hydro-mechanical using both a toggle mechanism as mould closing device and another mechanism as mould clamping device

Abstract

786,248. -Casting-machines. BUHLER, GEB. March 2, 1956 [March 3, 1955], No. 6675/56. Class 83 (1). In a die-casting, injection-moulding or like machine having one die mounted on a stationary platen and a second die on a movable platen, the movable platen is formed of a rear part and a front part which are relatively movable, the second die is secured to the movable platen front-part, the movable platen rear and front parts co-operate to form a fluid-pressure chamber whereby, upon fluid being admitted to said chamber, the two movable platen-parts are forced apart, and there are provided mechanical elements which retain the movable platen rearpart in its forward position, and at least a locking means disposed between the movable platen front and rear parts and movable, whereby to retain said movable platen two parts in their relatively spaced-apart positions and so provide a mechanical lock against movement apart of the two dies. The movable die platen comprises two parts 4, 7, the part 4 carrying the die 3 and forming a piston 15 which engages in a cylinder 16 in the part 7 to form a pressurechamber 17 to which pressure-fluid may be fed through a pipe 18. Wedges 19 between the parts 4, 7 may be moved to open the parts or allow them to move towards each other, by double-acting pistons 20. The assembly is moved forward to the die-closing position by a piston 28 acting through links 26 and arms 25 pivoted to the rear-part 7, until the arms 25 reach the end of guide-surfaces 32, when they spread apart and engage the faces 34, Fig. 3. Pressure-fluid is then fed to the chamber 17 to provide the locking-force on the dies 1 and 3. The wedges 19 are then drawn tightly between the parts 4, 7 by the pistons 20, so that the necessary locking-force between the dies is effected exclusively through mechanical elements, i.e. die 1, stationary platen 2, tie-rods 6, cross-head 5, arms 25, back-part 7, wedges 19, front-part 4, and die 3. Metal is injected by plunger 11. After injection, the dies are unlocked by slightly increasing pressure in the chamber 17 so that the wedges 19 may be withdrawn, the pressure in chamber 17 is then relieved, and the movable platen-assembly withdrawn by piston 28, Fig. 4, the part 4 being initially held stationary by the casting until constrained to move by bolts 24, whereupon the dies open and the casting is ejected. The wedges may be actuated electro-magnetically. In a modification, the wedges are located within the pressure-chamber 17. In a further modification, Fig. 8, the wedges are replaced by a screw-threaded ring 41b which is turned by a piston to press apart, or allow to move towards each other, the parts 4b and 7b. In a further modification, an externally-threaded ring is located within the pressure-chamber.
GB667556A 1955-03-03 1956-03-02 Improvements in or relating to die casting, injection moulding and other pressure machines Expired GB786248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH786248X 1955-03-03

Publications (1)

Publication Number Publication Date
GB786248A true GB786248A (en) 1957-11-13

Family

ID=4536605

Family Applications (1)

Application Number Title Priority Date Filing Date
GB667556A Expired GB786248A (en) 1955-03-03 1956-03-02 Improvements in or relating to die casting, injection moulding and other pressure machines

Country Status (1)

Country Link
GB (1) GB786248A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044119A (en) * 1958-03-12 1962-07-17 Raymond J Poulin Automatic injection molding machines
US3156014A (en) * 1959-06-06 1964-11-10 Krauss Maffei Ag Injection molding machine
US3208373A (en) * 1962-02-12 1965-09-28 Triulzi S A S A Closing system for presses
US3262158A (en) * 1962-07-16 1966-07-26 Reimer Vinzenz Von Injection or pressure fusion machine
EP0050520A1 (en) * 1980-10-20 1982-04-28 Prince Corporation Moulding machine
GB2335876A (en) * 1998-04-01 1999-10-06 Ae Goetze Chasseneuil Casting apparatus comprising two half core moulds

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044119A (en) * 1958-03-12 1962-07-17 Raymond J Poulin Automatic injection molding machines
US3156014A (en) * 1959-06-06 1964-11-10 Krauss Maffei Ag Injection molding machine
US3208373A (en) * 1962-02-12 1965-09-28 Triulzi S A S A Closing system for presses
US3262158A (en) * 1962-07-16 1966-07-26 Reimer Vinzenz Von Injection or pressure fusion machine
EP0050520A1 (en) * 1980-10-20 1982-04-28 Prince Corporation Moulding machine
GB2335876A (en) * 1998-04-01 1999-10-06 Ae Goetze Chasseneuil Casting apparatus comprising two half core moulds

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