US3292214A - Die-casting machine with bell crank drive - Google Patents

Die-casting machine with bell crank drive Download PDF

Info

Publication number
US3292214A
US3292214A US352519A US35251964A US3292214A US 3292214 A US3292214 A US 3292214A US 352519 A US352519 A US 352519A US 35251964 A US35251964 A US 35251964A US 3292214 A US3292214 A US 3292214A
Authority
US
United States
Prior art keywords
bell
cranks
pairs
mold
piston
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 - Lifetime
Application number
US352519A
Other languages
English (en)
Inventor
Battenfeld Werner
Schindler Siegfried
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.)
Gebr BATTENFELD Firma
Original Assignee
Gebr BATTENFELD Firma
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 Gebr BATTENFELD Firma filed Critical Gebr BATTENFELD Firma
Application granted granted Critical
Publication of US3292214A publication Critical patent/US3292214A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B29C45/70—Means for plasticising or homogenising the moulding material or forcing it into the mould, combined with mould opening, closing or clamping devices

Definitions

  • the present invention relates to a die-casting machine with a bell crank drive for the working of thermo-plastic artificial material, whereby, for the closing and opening movement of the mold, as well as for the working stroke and return stroke of the die-casting piston, a single drive only is provided, the driving connecting rod of which is pivotally connected with pairs of bell-cranks of diiferent lengths, of which the longer pair of bell-cranks engages a cross-traverse, which connects two longitudinal longerons carrying the mold carrying plate for a rigid locking of the mold, while the shorter pair of bell-cranks is pivotally connected with a piston carrier plate.
  • a pressure pillow built into the piston carrier plate retards the movement of the die-casting piston, so that the die-casting mold is rigidly locked, before the movement of the diecasting piston is terminated.
  • the present invention differs in an advantageous manner substantially from a bell-crank drive casting machine in accordance with the general notion for working of thermoplastic artificial material by the fact, that, on the one hand, all three bearings of the pairs of cranks are disposed movably relative to the drive and that, on the other hand, at the start of the mold closing movement, the driving connecting .rod and the longer pair of bellcranks, engaging a longeron cross-traverse, are disposed generally in the same direction and the driving connect ing rod exerts at first pressure upon the longer pair 01 bell-cranks, while at the start of the opening movement of the mold the driving connecting rod is disposed nearly in the same direction with the shorter pair of bell-cranks, engaging the piston carrying plate, and exerts at first a pulling effect upon the shorter pair of bell-cranks.
  • the force of the pressure pillow built into the piston carrier is adjusted to be smaller than the force with which the piston carrier is moved, a retarded movement speed of the die-cast piston is caused relative to the piston carrier, due to the resistance of the die-cast mass in the plastification cylinder, so that the die-cast process is terminated due to the release of the tension of the pressure pillow after the locking of the die-cast mold and a standstill of the driving system and the required after-pressure is maintained.
  • the pair of bell-cranks engaging the piston plate is at first operated in a pulling manner during the opening process, so that the piston returns before the mold opens.
  • a crank drive is used, the driving connecting rod of which engages the center joint of the pairs of bell-cranks and, thereby, the center axis of the drive crank is disposed on the side of the die-cast mold in a plane slightly in front of the center joint of the double-armed levers.
  • crank pin connecting the connecting rod with the drive disc is disposed at the start of the closing movement on the side of the driving disc opposite the shorter pair of bell-cranks, so that the connecting rod is disposed substantially in the same direction with the longer pair of bell-cranks, whereby it is achieved, that this pair of double-armed levers is at first displaced and thus also the mold is at first closed, prior to the start of the diecasting process by means of the die-cast piston.
  • crank pin caused by the rotationof the driving disc, is disposed at the start of the opening movement on the side of the driving disc opposite the longer pair of bell-cranks, so that the connecting rod and the shorter pair of bell-cranks are disposed about in the same direction, whereby it is brought about that at first, it operates in a pulling manner, thus withdrawing at first the die-cast piston, before the mold opens.
  • FIGURE 1 is an axial section of the die-casting machine designed in accordance with the present invention, and in particular, shown at the start of the closing movement;
  • FIG. 2 is an axial section similar to that shown in FIG. 1, showing the mold in a closed position and also after the completed die-casting process;
  • FIG. 3 is a top plan view of the die-casting machine, showing the mold in its closed position and indicating the position after completion of the die-casting process;
  • FIG. 4 is a fragmentary section of the machine within the range of the die-casting piston, likewise in the spraying position;
  • FIG. 5 is a fragmentary section similar to that shown in FIG. 4, indicating the completely open position.
  • the pair of bell-cranks 19 in turn is con nected with a cross traverse 21 by means of the pivot 17, which cross traverse 21 connects rigidly two longitudinal longerons 22.
  • These longitudinal longerons 22 are slidingly guided in bearings 23 and support a mold carrying plate 25 at their ends disposed remote from the cross traverse 21.
  • the cross-transverse 21 is displaced in the direction of the arrow, shown in FIG. 1, whereby the mold carrying plate 25 with a mold 26 is moved towards the spray side of a tool carrying plate 27 and the mold is closed.
  • a nozzle 28 seals itself thereby against the heat cylinder side of the spraying mold.
  • the closing movement is limited by the abutment of the nozzle plate 27 on a heating cyinder 29. Since now the 'crank pin 15 did not reach yet the highest position, a piston carrier pate 30, into which a hydraulic pneumatic pressure pillow is built in, moves in the direction of the arrow B (FIG. 2).
  • a spraying piston 31 presses the spraying material received in front thereof through a plastification cylinder 32 into the mold 26.
  • the piston 31 terminates, due to the efiect of the pressure pillow or also by the force of a spring, the filling of the mold.
  • a dosing device 34 Upon correct dosage, by means of a dosing device 34, a material surplus will be present in the plastification cylinder 32, so that the pressure pillow does not engage the abutment on the piston side and, thereby, maintains the required pressure for the spraying process.
  • crank pin of the driving disc 12 moves again downwardly from its highest position, however, now on the opposite side of the disc 12, so that the connecting rod 14 is disposed in about the same direction with the shorter pair of bell-cranks 20, and at first, effects the latter in a pulling manner during the opening movement and by withdrawing the piston carrier plate 30, while during the closing movement opposite conditions prevail, so that then first the longer pair of bell-cranks 19 is operated.
  • thermoplastic artificial material comprising a frame
  • crank-drive including a connecting rod mounted in said frame
  • crank drive constituting the sole drive for the closing and opening movement of a mold as well as for the working stroke and the return stroke of a feeding? piston, a cross-traverse pivotally connected with the longer one of said pairs of bell-cranks,

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US352519A 1963-03-25 1964-03-17 Die-casting machine with bell crank drive Expired - Lifetime US3292214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0071280 1963-03-25

Publications (1)

Publication Number Publication Date
US3292214A true US3292214A (en) 1966-12-20

Family

ID=6976975

Family Applications (1)

Application Number Title Priority Date Filing Date
US352519A Expired - Lifetime US3292214A (en) 1963-03-25 1964-03-17 Die-casting machine with bell crank drive

Country Status (3)

Country Link
US (1) US3292214A (de)
AT (1) AT246982B (de)
CH (1) CH409375A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830614A (en) * 1972-12-01 1974-08-20 A Kurtz Injection molding machine
US4158539A (en) * 1978-05-10 1979-06-19 Leesona Corporation Thermoforming machine with variable mold closed cycle
WO1985002363A1 (fr) * 1983-11-24 1985-06-06 Fanuc Ltd Dispositif de serrage de moule
US4588364A (en) * 1985-04-01 1986-05-13 Husky Injection Molding Systems Ltd. Clamp mechanism
USRE33248E (en) * 1985-04-01 1990-07-03 Clamp mechanism
US6024560A (en) * 1996-06-19 2000-02-15 Fanuc Ltd. Injection molding machine
US20020142066A1 (en) * 2001-04-03 2002-10-03 Nissei Plastic Industrial Co., Ltd. Traction type electric injection molding machine
US20120052144A1 (en) * 2010-08-24 2012-03-01 Schad Robert D Low profile stack mold carrier
US20210316486A1 (en) * 2020-04-08 2021-10-14 Mold-Masters (2007) Limited Molten plastic delivery system with push-pull cable actuation

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2073644B (en) * 1980-04-09 1983-11-09 Mining & Chemical Products Ltd Unjection moulding machine
DE102005030425B4 (de) * 2005-06-30 2008-06-05 Kraussmaffei Technologies Gmbh Elektrisches Einspritzaggregat für eine Spritzgießmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469994C (de) * 1927-12-04 1929-01-02 Eckert & Ziegler G M B H Spritzgussmaschine
FR1145554A (fr) * 1956-03-07 1957-10-28 Perfectionnements apportés aux machines à mouler par injection
US3117348A (en) * 1962-01-22 1964-01-14 Robert Dietrich Schad Injection-molding machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE469994C (de) * 1927-12-04 1929-01-02 Eckert & Ziegler G M B H Spritzgussmaschine
FR1145554A (fr) * 1956-03-07 1957-10-28 Perfectionnements apportés aux machines à mouler par injection
US3117348A (en) * 1962-01-22 1964-01-14 Robert Dietrich Schad Injection-molding machine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830614A (en) * 1972-12-01 1974-08-20 A Kurtz Injection molding machine
US4158539A (en) * 1978-05-10 1979-06-19 Leesona Corporation Thermoforming machine with variable mold closed cycle
WO1985002363A1 (fr) * 1983-11-24 1985-06-06 Fanuc Ltd Dispositif de serrage de moule
US4588364A (en) * 1985-04-01 1986-05-13 Husky Injection Molding Systems Ltd. Clamp mechanism
USRE33248E (en) * 1985-04-01 1990-07-03 Clamp mechanism
US6024560A (en) * 1996-06-19 2000-02-15 Fanuc Ltd. Injection molding machine
US20020142066A1 (en) * 2001-04-03 2002-10-03 Nissei Plastic Industrial Co., Ltd. Traction type electric injection molding machine
US6811392B2 (en) * 2001-04-03 2004-11-02 Nissei Plastic Industrial Co., Ltd. Traction type electric injection molding machine
US20120052144A1 (en) * 2010-08-24 2012-03-01 Schad Robert D Low profile stack mold carrier
US8469693B2 (en) * 2010-08-24 2013-06-25 Athena Automation Ltd. Low profile stack mold carrier
US20210316486A1 (en) * 2020-04-08 2021-10-14 Mold-Masters (2007) Limited Molten plastic delivery system with push-pull cable actuation
US11731330B2 (en) * 2020-04-08 2023-08-22 Mold-Masters (2007) Limited Molten plastic delivery system with push-pull cable actuation

Also Published As

Publication number Publication date
AT246982B (de) 1966-05-10
CH409375A (de) 1966-03-15

Similar Documents

Publication Publication Date Title
US3344848A (en) Die casting apparatus with non-turbulent fill and dual shot plunger arrangement
ES380490A1 (es) Una maquina de moldeo por inyeccion.
ES375083A1 (es) Dispositivo de cierre de molde, especialmente para maquinasde colada a presion y de colada por inyeccion para metales ymateriales sinteticos.
US4171941A (en) Gate of mold for injection molding machine
US3830614A (en) Injection molding machine
CN210908042U (zh) 一种快速降温的压铸模具
US3807915A (en) Unloading mechanism for injection-molding machine
GB1353716A (en) Injection moulding machines
US3398435A (en) Method and apparatus for molding plastics
GB1177705A (en) Injection Moulding
US2649693A (en) Hydraulically driven working machine for die-casting, injection molding, and the like
US3036337A (en) Injection molding machine with cushioning device
GB1120721A (en) Injection molding machine
US3609816A (en) Hydraulic clamping mechanism
JPS5821691Y2 (ja) ２段取り発泡スチロ−ル成形機におけるクラツキング装置
GB1153385A (en) Mould Opening and Closing Device for Injection Moulding Machines.
GB1175864A (en) Improvements in and relating to toggle lever drives for injection moulding machines
JPS6453751A (en) Die-casting device
GB1166083A (en) Improvements in or relating to Injection Moulding Machines
EP0037741B1 (de) Spritzgiessmaschine
GB1190170A (en) An improved Die Control Means for a Moulding Press
JP2675181B2 (ja) 電動射出成形機の型締装置
GB929105A (en) Improvements relating to injection moulding machines
GB1193405A (en) Pressure Molding Apparatus
JPS57137127A (en) Injection and compression molding device