WO1989002357A1 - Presse de formage amelioree - Google Patents

Presse de formage amelioree Download PDF

Info

Publication number
WO1989002357A1
WO1989002357A1 PCT/AU1988/000351 AU8800351W WO8902357A1 WO 1989002357 A1 WO1989002357 A1 WO 1989002357A1 AU 8800351 W AU8800351 W AU 8800351W WO 8902357 A1 WO8902357 A1 WO 8902357A1
Authority
WO
WIPO (PCT)
Prior art keywords
platen
die
coupling
members
coupling members
Prior art date
Application number
PCT/AU1988/000351
Other languages
English (en)
Inventor
Ray Alexander Nattrass
Original Assignee
Ray Alexander Nattrass
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 Ray Alexander Nattrass filed Critical Ray Alexander Nattrass
Publication of WO1989002357A1 publication Critical patent/WO1989002357A1/fr

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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/20—Opening, closing or clamping
    • B29C33/202—Clamping means operating on closed or nearly closed mould parts, the clamping means being independently movable of the opening or closing means
    • 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
    • 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
    • B29C2045/6735—Rotatable means coaxial with the coupling rod for locking the coupling rod to the mould platen
    • 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
    • B29C2045/6742—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 the coupling rods facilitating access between the mould halves

Definitions

  • Conventional injection moulding machines commonly comprise two fixed platens connected by tie bars with a third intermediate movable platen located between the fixed platens and moved by a hydraulic ram operable between one fixed platen and the movable platen.
  • the tie bars are tensioned to clamp together two die members located on the movable platen and the fixed platen (remote from the hydraulic ram) respectively.
  • the tie bars however cause considerable difficulty in changing large dies in a machine of this type as it can be very difficult, or impossible with some proposed dies, to manoeuvre the dies between the tie bars when changing dies. It will be appreciated that dies of this nature are extremely heavy and normally need to be supported by cranes or other heavy duty handling apparatus.
  • the present invention therefore provides a die press for injection moulding comprising a first fixed platen adapted to mount a first die member, a second platen adapted to mount a second die member, the second platen being movable toward and away from the first platen bringing the second die member into and out of engagement with the first die member, coupling means comprising a plurality of first coupling members mounted on and extending from the first platen toward the second platen, and corresponding second coupling members mounted on and extending from the second platen toward the first platen in register with the first coupling members, arranged such that the second coupling members are engageable with the first coupling members as the second platen approaches the first platen at the commencement of each injection cycle and disengageable as the second platen moves away from the first platen after injection leaving an open area surrounding the two die members for product removal or die changes, and clamping means comprising hydraulic piston and cylinder assemblies connected one to each of either the first or second coupling members and arranged to tension the coupling means after engagement
  • clamping means are connected to the first coupling members on the fixed platen.
  • the coupling members comprise male and female bayonet members engageable by inserting the male bayonet member into the female bayonet member and turning one member relative to the other.
  • the female bayonet member is incorporated in the first coupling member and is coupled to the piston in the clamping means.
  • the female bayonet member has a stem extending through the centre of the hydraulic piston to rotation means arranged to rotate the female bayonet member through a predetermined arc for engagement and disengagement with the male bayonet member.
  • Fig. 1 is a diagrammatic side view of an improved die press according to the invention showing the press in the open or demoulding position;
  • Fig. 2 is a similar view to Fig. 1 showing the press with the coupling means engaged ready for clamping;
  • Fig. 3 is a similar view to Figs. 1 and 2 showing the press in the clamped position ready for injection;
  • Fig. 4 is a view on the arrow IV of Fig. 3 showing the optional use of a central coupling member;
  • Fig. 5 is a partially cut-away elevation to an enlarged scale of the clamping means used in the improved die press according to the invention; and Fig. 6 is an end view of the apparatus shown in Fig. 4.
  • a die press is constructed having a first fixed platen (1) and a second movable platen (2) which is conveniently mounted on slide ways or tracks (not shown) at its lower point (3) and is movable toward and away from the fixed platen (1) as shown by arrow (4) under the influence of transport means (5).
  • the transport means is shown as a long stroke hydraulic piston and cylinder assembly having a piston (6) connected to a piston rod (7) and operable in an hydraulic cylinder (8). It will be appreciated however that alternative means of moving the platen (2) may be utilised, such as a rack and pinion drive mechanism.
  • the first platen is provided with a plurality of first coupling members (12), and typically four such coupling members arranged adjacent each corner of the platen.
  • the second platen (2) is provided with corresponding second coupling members (13) arranged in register with the first coupling members so that as the second platen (2) is moved toward the first platen as shown in Fig. 2, the second coupling members (13) align with, and are engaged with the first coupling members (12) .
  • the coupling members may be provided in any appropriate form but typically comprise bayonet couplings wherein a male bayonet member (14) is provided on each of the second coupling members (13), and a female bayonet member (15) on each of the first bayonet members (12).
  • a male bayonet member (14) is provided on each of the second coupling members (13), and a female bayonet member (15) on each of the first bayonet members (12).
  • the construction and operation of the bayonet members will be described later with particular reference to Figs. 4 and 5.
  • the die press is further provided with clamping means in the form of hydraulic piston and cylinder assemblies (16) connected to each of the first coupling members (12) .
  • the hydraulic piston and cylinder assemblies are operable to pull the first coupling members (12) away from the second platen (2) after engagement of the bayonet members (14) and (15) in order to securely clamp the two die members (10) and (11) together for the injection process.
  • Fig. 1 shows the machine in the fully open position at the commencement of the cycle.
  • the transport ram (5) is then actuated moving the movable platen (2) toward the fixed platen (1) until the coupling means (12) and (13) are engaged as shown in Fig. 2 with the die members located a short distance apart.
  • the bayonet members (14) and (15) are then engaged and hydraulic pressure applied to the piston and cylinder assemblies (16) causing the pistons (17) therein to move from right to left in the sense shown in the accompanying drawings moving the two die members (10) and (11) into contact and applying a clamping pressure to the die members for the injection process.
  • the coupling (13A) is of exactly the same configuration as the couplings (12, 13) previously described but is located in the centre of the platens (1) and (2) and therefore in the centre of the dies (10) and (11).
  • Many products have a natural aperture or opening at or about the central region permitting the location of such a coupling and in other products, design variations may be made to allow the central coupling of the die platens to be incorporated. Although this necessitates forming a hole or aperture through the middle of the product, such aperture can later be filled in by a cover plate in the actual finished product, where desired.
  • a central coupling member of this type can be utilised as the disconnection of the coupling in the open or demoulding position as shown in Fig. 1 allows the product to be removed from the dies.
  • Large die presses using conventional tie bars cannot of course incorporate such a central coupling as the moulded product could never be removed from the dies at the end of the moulding cycle.
  • the use of the central coupling (13A) resists the bowing forces in the platens (1) and (2) during the injection process and therefore allows either lighter and less expensive platens to be used in the machine, or enables even larger product to be manufactured.
  • the hydraulic cylinder (16) is mounted on the platen (1) and contains the piston (17).
  • the piston is located in a chamber (18) to which hydraulic pressure can be applied on either side of the piston (17) by hydraulic pumping apparatus and/or accumulators (not shown) .
  • the piston (17) may be prevented from rotating in the cylinder (16) by way of a dowel pin (19).
  • the piston (17) has a hollow centre in which is located a tension shaft (20) having a flange (21) at one end.
  • the piston (17) is arranged to tension the shaft (20) by applying force from a shoulder (22) via a bearing surface (23) to the flange (21). In this manner the piston (17) may apply considerable force and tension to the shaft (20) while allowing the shaft (20) to rotate relative to the piston (17).
  • the female bayonet member (15) is provided in the form of a substantially cylindrical collar (16) having inwardly flanged ends (24). Each inwardly flanged end is provided with castellations, and the end of the shaft (20) is provided with a corresponding male bayonet fitting (25) which is inserted into the collar (16) through the castellations at the left hand end (as shown in Fig. 5) and then rotated to firmly lock the male bayonet member (25) in place in the collar.
  • This configuration is for ease of assembly only, allowing the male bayonet member (25) to be inserted through the hollow end in the piston (17) and then locked in place in the collar (16) by set screws (26).
  • the female bayonet fitting (15) is formed having castellated openings (27) leading to an interior chamber (28) behind which a male bayonet fitting may be locked and engaged against shoulders (29) for the application of tensioning force to the coupling means.
  • a mounting plate (30) to which is attached a radial arm (31) .
  • the outer end of the radial arm is provided with a mounting bracket (32) forming a support mounting for a hydraulic piston and cylinder assembly (33) used to rotate the shaft
  • the male bayonet member (14) is simlar in configuration to the bayonet member (25) and is arranged to be axially movable through the castellations (27) when the female bayonet member is rotated to the unlocked position, and to be held behind the castellations (24) in the chamber (28), abutting the shoulders (29), when the female bayonet member is rotated to the locked position.
  • Each male bayonet member (14) is mounted on the corresponding coupling member (13) which is in turn secured to the movable platen (2) .
  • This mounting is adjustable for length to enable dies of different thicknesses to be mounted between the platens (1) and (2).

Landscapes

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

Abstract

Presse de formage permettant le moulage par injection, conçue sans les traverses classiques pour relier les plateaux porte-moule (1) et (2). Les plateaux sont solidarisés par des accouplements à baïonnette (14) et (15), accouplés lorsque l'on déplace les plateaux l'un vers l'autre, les éléments de moule (10) et (11) étant verrouillés par la pression hydraulique appliquée dans des vérins (16). L'absence de traverses permet d'utiliser de très grands moules et facilite l'échange de ces derniers ainsi que le retrait de produits de grande dimension des moules, entre les opérations de moulage. On a également envisagé l'utilisation d'un ou de plusieurs autres éléments à baïonnettes d'accouplement, situés au centre des moules ou adjacents à celui-ci.
PCT/AU1988/000351 1987-09-08 1988-09-08 Presse de formage amelioree WO1989002357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU421687 1987-09-08
AUPI4216 1987-09-08

Publications (1)

Publication Number Publication Date
WO1989002357A1 true WO1989002357A1 (fr) 1989-03-23

Family

ID=3694667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1988/000351 WO1989002357A1 (fr) 1987-09-08 1988-09-08 Presse de formage amelioree

Country Status (1)

Country Link
WO (1) WO1989002357A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0570759A1 (fr) * 1992-05-21 1993-11-24 Hemscheidt Maschinentechnik Schwerin GmbH & Co. Dispositif de fermeture de moule pour introduire de grandes forces de fermeture
EP0824058A1 (fr) * 1996-08-12 1998-02-18 MANNESMANN Aktiengesellschaft Machine à mouler par injection à deux plateaux
WO2002083394A1 (fr) * 2001-04-11 2002-10-24 S.I.P.A. Societa'industrializzazione Progettazione E Automazione S.P.A. Dispositif de fixation pour moules
DE4142230C2 (de) * 1991-12-20 2003-04-24 Battenfeld Kunststoffmasch Anlage zum Spritzgießen von Kunststoffmaterial
EP1512512A2 (fr) * 2003-08-14 2005-03-09 Battenfeld GmbH Appareil de moulage par injection
FR3019773A1 (fr) * 2014-04-15 2015-10-16 Plastisud Moule en tandem pour la realisation de pieces injectees en matiere synthetique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916768A (en) * 1955-03-19 1959-12-15 Ind V H V Lohuizen & Co Nv Locking device for injection molding machines
GB1289985A (fr) * 1969-10-15 1972-09-20
GB1601419A (en) * 1977-05-10 1981-10-28 Warnke Umformtech Veb K Mould closing and locking arrangement for injection moulding machines
AU3592784A (en) * 1984-05-08 1985-11-14 Mauser-Werke Gmbh Mould closing device
AU4739185A (en) * 1984-11-06 1986-06-05 Mauser-Werke Gmbh Mould closing device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2916768A (en) * 1955-03-19 1959-12-15 Ind V H V Lohuizen & Co Nv Locking device for injection molding machines
GB1289985A (fr) * 1969-10-15 1972-09-20
GB1601419A (en) * 1977-05-10 1981-10-28 Warnke Umformtech Veb K Mould closing and locking arrangement for injection moulding machines
AU3592784A (en) * 1984-05-08 1985-11-14 Mauser-Werke Gmbh Mould closing device
AU4739185A (en) * 1984-11-06 1986-06-05 Mauser-Werke Gmbh Mould closing device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142230C2 (de) * 1991-12-20 2003-04-24 Battenfeld Kunststoffmasch Anlage zum Spritzgießen von Kunststoffmaterial
EP0570759A1 (fr) * 1992-05-21 1993-11-24 Hemscheidt Maschinentechnik Schwerin GmbH & Co. Dispositif de fermeture de moule pour introduire de grandes forces de fermeture
EP0824058A1 (fr) * 1996-08-12 1998-02-18 MANNESMANN Aktiengesellschaft Machine à mouler par injection à deux plateaux
WO2002083394A1 (fr) * 2001-04-11 2002-10-24 S.I.P.A. Societa'industrializzazione Progettazione E Automazione S.P.A. Dispositif de fixation pour moules
EP1512512A2 (fr) * 2003-08-14 2005-03-09 Battenfeld GmbH Appareil de moulage par injection
EP1512512A3 (fr) * 2003-08-14 2005-06-15 Battenfeld GmbH Appareil de moulage par injection
FR3019773A1 (fr) * 2014-04-15 2015-10-16 Plastisud Moule en tandem pour la realisation de pieces injectees en matiere synthetique
WO2015158965A1 (fr) * 2014-04-15 2015-10-22 Plastisud Moule en tandem pour la réalisation de pièces injectées en matière synthétique
US10857712B2 (en) 2014-04-15 2020-12-08 Plastisud Tandem mold for creating injection-molded parts from synthetic material

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