WO2008149401A1 - Machine à couler sous pression - Google Patents

Machine à couler sous pression Download PDF

Info

Publication number
WO2008149401A1
WO2008149401A1 PCT/IT2008/000377 IT2008000377W WO2008149401A1 WO 2008149401 A1 WO2008149401 A1 WO 2008149401A1 IT 2008000377 W IT2008000377 W IT 2008000377W WO 2008149401 A1 WO2008149401 A1 WO 2008149401A1
Authority
WO
WIPO (PCT)
Prior art keywords
platen
moving platen
fixed
bedplate
die
Prior art date
Application number
PCT/IT2008/000377
Other languages
English (en)
Inventor
Federico Albertini
Original Assignee
Italpresse Industrie S.P.A.
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 Italpresse Industrie S.P.A. filed Critical Italpresse Industrie S.P.A.
Publication of WO2008149401A1 publication Critical patent/WO2008149401A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/26—Mechanisms or devices for locking or opening dies
    • B22D17/266—Mechanisms or devices for locking or opening dies hydraulically
    • 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
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/67—Mould opening, closing or clamping devices hydraulic
    • B29C45/6707—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement
    • B29C45/6714—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould
    • B29C45/6728—Mould opening, closing or clamping devices hydraulic without relative movement between the piston and the cylinder of the clamping device during the mould opening or closing movement using a separate element transmitting the mould clamping force from the clamping cylinder to the mould the separate element consisting of coupling rods

Definitions

  • This invention concerns horizontal die-casting machines and refers in particular to a die-casting machine with an improved closing and clamping device. State of the technique
  • the machines for die-casting metal parts comprise a bedplate and on said bedplate a fixed vertical platen, and a moving vertical platen, where said two platens are parallel and the moving platen is guided above the bedplate and movable horizontally towards and away from said fixed platen.
  • the moving vertical platen besides being guided along the bedplate, is guided along the horizontal columns, usually four, that extend from the fixed platen.
  • the facing sides of the fixed and moving platens support the two complementary parts of a mould forming together the shape of the item to be die-cast.
  • One part of the mould is stationary, fastened to the fixed vertical platen; the other part of the mould is fixed and moves with the moving platen to close and open the mould.
  • an injection unit is provided and supported to deliver the molten metal into the cavity of the mould when the latter is closed.
  • the fast movements of the moving platen with the relative part of the mould, between the open and closed positions, can be achieved by means of at least one hydraulic cylinder.
  • the moving platen when it is then in the closed position, the moving platen must also be blocked to ensure that the mould remains closed in opposition to the thrust of the molten material that is injected into it.
  • Blocking can be carried out either by using clamps positioned and operated to radially engage the horizontal guide columns, just behind the moving platen, or by using a toggle system.
  • the machine will have only two vertical planes, one fixed and the other mobile, and the horizontal guide columns are substantially overhanging starting from their proximal ends connected to the fixed vertical platen, as their distal ends have no support. Even if they extend through the moving platen, the columns remain susceptible to flexure/deflections, conditions that can be adverse for a correct and precise guide of the moving platen along the bedplate during its opening and closing movements of the mould.
  • the toggle blocking system is connected to the rear face of the moving paten and can be supported by a third vertical platen, a so-called reaction platen, that extends upwards from the bedplate, at the back and at a distance from the moving platen.
  • reaction platen is not properly fixed or rigid in that it is assembled on the bedplate with the possibility of traverse for its positioning and movements, even though limited, in response to the blocking thrusts of the toggle system when this is activated. Consequently, it can still be seen that the guide columns are not rigidly supported at their distal ends and that the guide of the moving platen in its opening and closing movements does not always seem correct and precise.
  • the objective of this invention is to eliminate the above inconveniences and drawbacks in a die-casting machine and at the same time create the conditions so that such a machine has a structure which is really rigid so as to improve its performance by having a moving platen with maximum movement precision and subsequent closure of the mould.
  • the objective is achieved with a die-casting machine according to the preamble in claim 1 and characterised by a third rigid vertical platen, fixed stably on the bedplate in parallel at a distance and at the back of the moving platen so that said third platen forms a positive support for the distal ends of the horizontal guide columns.
  • the die-casting machine has the following advantages:
  • the moving platen is guided and slides correctly along the horizontal columns, with the possibility in this way of being able to simplify the centring and sliding means of the moving platen on and relatively towards the bedplate;
  • the third fixed platen can also be used to carry the actuator or actuators or the hydraulic cylinders designed for the movements of the moving platen when closing or opening the mould.
  • Fig. 1 is a schematic side view of an example of a die casting machine according to the invention
  • Fig. 2 is a view from above of the machine in Fig. 1 .
  • Fig. 3 is an end on view of the machine from the third fixed platen. Detailed Description of the Invention
  • the die-casting machine comprises a bedplate 21 from which extend upwards, vertically and in parallel, a first fixed platen 22, a second moving platen 23 and a third fixed platen 24 and where the moving platen 22 is positioned between the fixed platens and is movable horizontally towards and away from the first fixed platen.
  • Both the first platen 22 and the third platen 24 are firmly fixed to the bedplate 21 and form means of support, respectively for the proximal and distal ends, of four horizontal columns 25 placed according to the sides of a quadrilateral.
  • the moving platen 23 is guided on the bedplate 21 and along the columns 25 that cross it.
  • the first fixed platen 22 and the moving platen 24 hold to two matching parts of a forming mould-not shown- which is opened and closed in response to the movements of the moving platen away from and towards the first fixed platen, respectively.
  • the bedplate also supports an injection unit 26 placed external to the first fixed platen 12 and designed to inject the molten metal into the mould when the latter is closed.
  • At least one hydraulic actuator 27 can be associated with the moving platen 23 for its movements from one position to the other. More specifically in the example illustrated in the drawings two hydraulic cylinders are provided, assembled advantageously in a symmetric position on the third fixed platen 24 and with relative rods facing towards and connected to the moving platen.
  • a stopping device 28 which is in itself well known, provided to radially engage the relative column and to block the moving platen in the forward closed position of the mould during the die-casting steps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)

Abstract

La présente invention concerne une machine à couler sous pression pourvue d'une plaque de base dont s'étend verticalement une première plaque fixe (22) soutenant des colonnes de guidage horizontales (25), une deuxième plaque amovible (23) pouvant se déplacer sur la plaque de base et le long des colonnes horizontales en direction et à l'opposée de la première plaque fixe, ainsi qu'une troisième plaque fixe (24) qui forme un support rigide positif pour les extrémités distales des colonnes de guidage horizontales (25) et pour les actionneurs de la commande hydraulique pour les mouvements de la plaque amovible (23).
PCT/IT2008/000377 2007-06-08 2008-06-05 Machine à couler sous pression WO2008149401A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000079A ITBS20070079A1 (it) 2007-06-08 2007-06-08 Macchina per pressofusione
ITBS2007A000079 2007-06-08

Publications (1)

Publication Number Publication Date
WO2008149401A1 true WO2008149401A1 (fr) 2008-12-11

Family

ID=39875780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2008/000377 WO2008149401A1 (fr) 2007-06-08 2008-06-05 Machine à couler sous pression

Country Status (2)

Country Link
IT (1) ITBS20070079A1 (fr)
WO (1) WO2008149401A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110681839A (zh) * 2019-07-16 2020-01-14 菱沼压铸机株式会社 油压直压式合模结构分型面射出热室压铸机

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998665A (en) * 1963-11-29 1965-07-21 Loewy Eng Co Ltd Mould-closing device for injection moulding machines
GB1175632A (en) * 1967-04-27 1969-12-23 Schloemann Ag An Injection Moulding Machine
US3857440A (en) * 1972-03-22 1974-12-31 Netstal Ag Maschf Giesserei Die casting machine
DE3844432C1 (fr) * 1988-12-31 1990-01-25 Karl 7298 Lossburg De Hehl
EP0446565A1 (fr) * 1990-02-14 1991-09-18 M.G.P. ITALIA S.r.l. Dispositif pour positionner le plateau de verrouillage pour machines à couler sous pression ou par injection
EP0511170A2 (fr) * 1991-04-22 1992-10-28 B.M.B. S.p.A. Dispositif de fermeture pour le moule dans des machines à double genouillère pour le moulage de matières plastiques ou pour la coulée sous pression
WO2006082608A1 (fr) * 2005-02-07 2006-08-10 Italpresse Industrie S.P.A. Amelioration d'une machine a couler sous pression
US20070237851A1 (en) * 2006-04-10 2007-10-11 Baron Frank D R Two platen traverse cylinder mounting system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998665A (en) * 1963-11-29 1965-07-21 Loewy Eng Co Ltd Mould-closing device for injection moulding machines
GB1175632A (en) * 1967-04-27 1969-12-23 Schloemann Ag An Injection Moulding Machine
US3857440A (en) * 1972-03-22 1974-12-31 Netstal Ag Maschf Giesserei Die casting machine
DE3844432C1 (fr) * 1988-12-31 1990-01-25 Karl 7298 Lossburg De Hehl
EP0446565A1 (fr) * 1990-02-14 1991-09-18 M.G.P. ITALIA S.r.l. Dispositif pour positionner le plateau de verrouillage pour machines à couler sous pression ou par injection
EP0511170A2 (fr) * 1991-04-22 1992-10-28 B.M.B. S.p.A. Dispositif de fermeture pour le moule dans des machines à double genouillère pour le moulage de matières plastiques ou pour la coulée sous pression
WO2006082608A1 (fr) * 2005-02-07 2006-08-10 Italpresse Industrie S.P.A. Amelioration d'une machine a couler sous pression
US20070237851A1 (en) * 2006-04-10 2007-10-11 Baron Frank D R Two platen traverse cylinder mounting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110681839A (zh) * 2019-07-16 2020-01-14 菱沼压铸机株式会社 油压直压式合模结构分型面射出热室压铸机
CN110681839B (zh) * 2019-07-16 2021-08-03 菱沼压铸机株式会社 油压直压式合模结构分型面射出热室压铸机

Also Published As

Publication number Publication date
ITBS20070079A1 (it) 2008-12-09

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