EP0846049A2 - Unite de moulage par injection pour machine de moulage par injection de matieres plastiques - Google Patents

Unite de moulage par injection pour machine de moulage par injection de matieres plastiques

Info

Publication number
EP0846049A2
EP0846049A2 EP96932445A EP96932445A EP0846049A2 EP 0846049 A2 EP0846049 A2 EP 0846049A2 EP 96932445 A EP96932445 A EP 96932445A EP 96932445 A EP96932445 A EP 96932445A EP 0846049 A2 EP0846049 A2 EP 0846049A2
Authority
EP
European Patent Office
Prior art keywords
injection molding
spindle
molding unit
injection
unit according
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.)
Ceased
Application number
EP96932445A
Other languages
German (de)
English (en)
Inventor
Karl Hehl
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
Priority claimed from DE1995131328 external-priority patent/DE19531328C2/de
Priority claimed from DE19542453A external-priority patent/DE19542453C2/de
Application filed by Individual filed Critical Individual
Publication of EP0846049A2 publication Critical patent/EP0846049A2/fr
Ceased legal-status Critical Current

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
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • 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
    • B29C45/03—Injection moulding apparatus
    • B29C45/07—Injection moulding apparatus using movable injection units
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B29C2045/5084—Drive means therefor screws axially driven by roller elements

Definitions

  • the invention relates to an injection molding unit for a plastic injection molding machine for processing plastifiable masses according to the preamble of claim 1.
  • Such an injection molding unit is known from EP-A 576 925 in which a carrier block is axially displaceably mounted relative to a stationary mold carrier.
  • the connection between the carrier block and the stationary mold carrier takes place via nested electromechanical spindle drives, which comprise a drive unit designed as a hollow shaft motor for applying the nozzle to the injection mold and an injection unit that generates the axial movement of the screw conveyor within the plasticizing cylinder during injection.
  • a rotary motor for rotating the screw conveyor is also provided on an injection bridge.
  • guide rails are provided on the machine base, on which at least the carrier block is guided.
  • REPLACEMENT BLA ⁇ (RULE 26) exact guidance. No other guide elements are provided.
  • the serial arrangement of the drive unit and injection unit leads to a large overall length of the injection molding unit, since the movement paths of the two units line up. If a unit is defective, at least one 'spar' must be dismantled with both units, so that unnecessary extra work and additional costs result.
  • the present invention is based on the object of developing an injection molding unit of the type mentioned at the outset in such a way that improved guidance of the injection molding unit results in a favorable manner.
  • the point of articulation of the longer part of the spindle and spindle nut is used for a guiding function in that the longer part is also designed as a guide bar in its end region.
  • this has the advantage of a considerably more precise and precise positioning.
  • FIG. 2 shows a view of the injection molding machine according to FIG. 1 from the right
  • FIG. 3 shows a section along line 3-3 of FIG. 1,
  • FIG. 4 shows a side view of the injection molding unit according to FIG. 1 in a further embodiment, the guide area being supported by a support element,
  • FIG. 5 shows a view of the injection molding unit according to FIG. 4 from the right
  • FIG. 6 shows a view of the injection molding unit according to FIG. 4 with a rotary motor that is identical in construction to the injection motors
  • Fig. 7 shows a section through a hollow shaft motor.
  • the injection molding unit is used for dosing and injecting plasticized material such as plastics, in powder form Masses and ceramic masses in a mold cavity 80 of a mold M, which can be attached in part to a stationary mold carrier 35 of a mold clamping unit. With a nozzle D, the injection molding unit lies against the mold M during injection.
  • Figures 1 to 3 show the basic structure of the Spritzg cord ⁇ unit of a plastic injection molding machine, as it is also the basis of the other embodiments.
  • the injection molding unit has a carrier block 10 ', by means of which the injection molding unit is essentially supported on a machine frame 81.
  • the support takes place with the interposition of two strips 62 'which carry guide rails 19 on their upper side.
  • the carrier block 10 'on guide shoes 79 can be moved towards and away from the stationary mold carrier 35 by at least one spindle drive A. Nevertheless, the entire injection molding unit and its support are detached from the machine base, e.g. can be moved or pivoted as a structural unit for injection into the parting plane.
  • a spindle 31 'as a longer part and a spindle nut 78 as a shorter part of the spindle drives A can be moved relative to one another, the spindle nut being rotatably connected to the axially displaceable carrier block 10' and the spindle 31 'to the stationary mold carrier 35.
  • At least one hollow shaft motor 73 drives the spindle nut 78 of the spindle drive A to place the nozzle D on the mold M, if necessary via an integrated planetary gear.
  • Both spindle drives can be controlled separately from hollow shaft motors.
  • the cost of a motor per drive is offset by the advantage that the entire drives can be subjected to a functional test in the manufacturer's operation and can then be supplied to the injection molding unit as a structural unit.
  • At least one, preferably two further spindle drives E are provided, which have spindles 18 ′ and nuts 11 as parts that can move relative to one another. A part of these two parts is arranged on the injection bridge 25 'and the other on the support block 10'.
  • the injection bridge moves relative to the carrier block in such a way that the conveying means 72 is moved axially in a plasticizing unit 17.
  • the plasticizing unit comprises a plasticizing cylinder 36, which is arranged on the front of the carrier block 10 '. If a conveyor screw is provided as the conveyor 72, a rotary motor 52 ', 52' 'is also arranged such that it drives the conveyor screw in the spray axis s-s. If only one delivery piston is provided, this delivery means also penetrates the carrier block 10 'and is mounted on the injection bridge 25', but a rotary motor is not required in this case.
  • the rotary motor 52 ' is arranged to rotate the conveyor 72 designed as a screw conveyor transversely to the spray axis s-s, preferably projecting upwards, so that the injection molding unit is shortened. This moves the center of gravity of the injection molding unit further towards the center.
  • a favorable speed / torque characteristic for the conveyor 72 can be achieved via a gear 26 ', preferably a bevel gear.
  • the longer part of the spindle and spindle nut of the spindle drive A for the application of the nozzle D as a stable guide element is extended through the injection molding unit.
  • There it has a guide area 31a '.
  • This guide area serves for the precise and positionally accurate guidance of the carrier block 10 'by means of slide bearings 33a and also the injection bridge 25' by means of slide bearings 33b.
  • the double function of the spindle 31 'of the hollow shaft motor 73 reduces the mass to be moved when the nozzle is applied.
  • the double function of the spindle is achieved by dissolving the combination of injection unit and drive unit existing in the prior art. This makes it possible to use the injection motor and the rotary motor as the standard motor at the same time and largely identical in design, which as a side effect of the improved guidance also leads to a cost reduction in the construction of the entire injection molding unit.
  • FIG. 7 shows a hollow shaft motor in which the longer part is a tube 110 with an inner profile, into which a rod 111 with a spindle head is purple.
  • the purple spindle head is a 'nut' with an external profile, which in FIG. 7 cooperates with the internal profile of the tube 110 via rolling or rolling elements 112.
  • direct transmission without rolling elements would also be possible.
  • the tube 110 here represents the rotor 21 of the hollow shaft motor 22, the interior R being able to be vented via the vent 23.
  • the hollow shaft motor illustrated in this way could also perform the guiding function when the tube 110 is extended with this tube as a longer part of the spindle drive, as shown in FIGS. 1 to 6.
  • the integrated planetary gears 26 '', 51a ' allow the use of larger spindles, which is equivalent to a longer service life of the drive. At the same time, a larger pitch can be achieved on the spindles, so that there is an optimization in that the torque can be set relatively high and the speed can be reduced at the same time. This also contributes to increasing the service life.
  • the carrier block 10 ' is movable on the spindle 31' up to a stop 32 '.
  • the spindle 31 ' In its front area, the spindle 31 'is held in a holding plate 27.
  • This holding plate is connected to the strips 62 'on which the support block 10' is guided at the level of the machine frame 81.
  • a three-dimensional frame is formed in the last two exemplary embodiments of FIGS. 4 to 6 with bar 62 'and holding plate 27 by providing a support plate 82 which then guides the guide region 31a' of the spindle 31 'of the spindle drives A is also supported in the rear area.
  • Interchangeable intermediate pieces 13 are arranged between one part of the spindle drive A and the carrier block 10 'or between this part and the stationary mold carrier 35. They lie in the axis aa of the spindle 31 '.
  • the intermediate pieces 13 form at least parts of spars into which the spindles 31 'of the spindle drives A are immersed or which they penetrate.
  • the intermediate pieces 13 can also serve as a guide for the plasticizing unit 17.
  • the intermediate pieces are usually delivered in the shortest and therefore the cheapest form of transportation for delivery to the customer.
  • a longer L / D ratio of the conveying means 72 can be achieved by exchanging the intermediate pieces 13 for longer ones or by lining up intermediate pieces 13.
  • the intermediate pieces can, for example, already be supplied by the manufacturer in a length which corresponds to an L / D ratio of 5, so that the usual L / D ratio can be increased from 20 to 25 by stringing two intermediate pieces together.

Landscapes

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

Abstract

L'invention concerne une unité de moulage par injection comprenant une unité de plastification (17) et un bloc de support (10') dans lequel vient se loger, de façon amovible, ladite unité de plastification. L'unité de moulage par injection présentée comporte également un mécanisme d'entraînement à broche (A) pourvu d'une broche (31') et d'un écrou (78), servant à amener la buse (D) contre le moule (M). La plus longue partie de la broche (31') ou de l'écrou (78) est bloquée en rotation par rapport au porte-moule (64) fixe et est conçue pour guider au moins le bloc de support (10') le long d'une zone de guidage (31a'), cette zone appartenant à ladite partie la plus longue de la broche ou de l'écrou.
EP96932445A 1995-08-25 1996-08-13 Unite de moulage par injection pour machine de moulage par injection de matieres plastiques Ceased EP0846049A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19531328 1995-08-25
DE1995131328 DE19531328C2 (de) 1995-08-25 1995-08-25 Spritzgießeinheit für eine Kunststoff-Spritzgießmaschine
DE19542453A DE19542453C2 (de) 1995-11-14 1995-11-14 Vorrichtung zur Umwandlung einer Drehbewegung in eine Axialbewegung
DE19542453 1995-11-14
PCT/DE1996/001534 WO1997007959A2 (fr) 1995-08-25 1996-08-13 Unite de moulage par injection pour machine de moulage par injection de matieres plastiques

Publications (1)

Publication Number Publication Date
EP0846049A2 true EP0846049A2 (fr) 1998-06-10

Family

ID=26018000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96932445A Ceased EP0846049A2 (fr) 1995-08-25 1996-08-13 Unite de moulage par injection pour machine de moulage par injection de matieres plastiques

Country Status (4)

Country Link
EP (1) EP0846049A2 (fr)
JP (1) JPH11511084A (fr)
CA (1) CA2227992A1 (fr)
WO (1) WO1997007959A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1024055C2 (nl) 2003-08-06 2005-02-08 Otb Group Bv Spuitgietinrichting alsmede werkwijze voor het gebruik van een dergelijke spuitgietinrichting.
DE102012010010A1 (de) * 2012-05-22 2013-11-28 Arburg Gmbh + Co Kg Spritzgießeinheit für eineKunststoff-Spritzgießmaschine
JP6605377B2 (ja) * 2016-03-24 2019-11-13 住友重機械工業株式会社 射出成形機

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB965214A (en) * 1960-01-18 1964-07-29 Projectile And Engineering Com Improvements in or relating to injection moulding machines
DE2041186A1 (de) * 1970-08-19 1972-02-24 Stuebbe Gmbh Maschf Spritzeinheit fuer Spritzgiessmaschinen
CH577376A5 (en) * 1974-11-26 1976-07-15 Netstal Ag Maschf Giesserei Plastics injection moulding machine - having hydraulically operated plasticising injection screw driving shaft, pistons-cylinders and guide beams
JPH0669705B2 (ja) * 1990-11-28 1994-09-07 日精樹脂工業株式会社 電動式竪型射出成形機
DE4130287A1 (de) * 1991-02-23 1993-04-01 Karl Hehl Plastifizierzylinder an einer kunststoff-spritzgiessmaschine
DE59307151D1 (de) * 1992-06-23 1997-09-25 Battenfeld Kunststoffmasch Spritzaggregat für Spritzgiessmaschinen
DE4224195C2 (de) * 1992-07-17 1995-04-27 Mannesmann Ag Spritzgießmaschine
DE4317998C2 (de) * 1993-05-29 1995-06-14 Karl Hehl Spritzgießeinheit für eine Kunststoff-Spritzgießmaschine
DE4344335C2 (de) * 1993-12-23 1996-02-01 Krauss Maffei Ag Einspritzaggregat für eine Spritzgießmaschine
DE4409822C2 (de) * 1994-02-19 1997-06-12 Procontrol Ag Antrieb für wenigstens eine linear bewegbare Achse einer Spritzgießmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9707959A3 *

Also Published As

Publication number Publication date
WO1997007959A2 (fr) 1997-03-06
CA2227992A1 (fr) 1997-03-06
JPH11511084A (ja) 1999-09-28
WO1997007959A3 (fr) 1997-04-10

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