EP3511090A1 - Procédé de coulée sous pression à chambre froide et machine de coulée sous pression à chambre froide - Google Patents

Procédé de coulée sous pression à chambre froide et machine de coulée sous pression à chambre froide Download PDF

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Publication number
EP3511090A1
EP3511090A1 EP18151741.8A EP18151741A EP3511090A1 EP 3511090 A1 EP3511090 A1 EP 3511090A1 EP 18151741 A EP18151741 A EP 18151741A EP 3511090 A1 EP3511090 A1 EP 3511090A1
Authority
EP
European Patent Office
Prior art keywords
casting
chamber
die
piston
casting chamber
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.)
Granted
Application number
EP18151741.8A
Other languages
German (de)
English (en)
Other versions
EP3511090B1 (fr
Inventor
Höhr Heribert
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.)
Druckguss Service Deutschland GmbH
Original Assignee
Druckguss Service Deutschland GmbH
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 Druckguss Service Deutschland GmbH filed Critical Druckguss Service Deutschland GmbH
Priority to EP18151741.8A priority Critical patent/EP3511090B1/fr
Priority to HUE18151741A priority patent/HUE061923T2/hu
Priority to PL18151741T priority patent/PL3511090T3/pl
Priority to ES18151741T priority patent/ES2836523T3/es
Publication of EP3511090A1 publication Critical patent/EP3511090A1/fr
Application granted granted Critical
Publication of EP3511090B1 publication Critical patent/EP3511090B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B22D17/2076—Cutting-off equipment for sprues or ingates
    • 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
    • B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
    • B22D17/12—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with vertical press motion
    • 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
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2272—Sprue channels
    • B22D17/2281—Sprue channels closure devices therefor

Definitions

  • the invention relates to a Kalthuntdruckg machineclar and a Kalthunttikg manmaschine with the features listed in the preamble of claim 5.
  • the present invention relates to a cold chamber die casting method and to a cold chamber die casting machine having a vertical casting chamber arrangement.
  • the Kaltshutting domesticmaschine described therein is intended for die casting of aluminum parts with central sprue and has two oppositely arranged die casting molds, which each have a sprue, which opens transversely near the lower end of a vertical casting chamber.
  • This casting chamber is closed at the bottom by an opposing piston, wherein the pressure to be applied for the casting process is applied by a casting piston coming from above.
  • the counter-piston serves on the one hand for closing the casting chamber down and on the other hand for shearing and ejecting the located in the casting chamber Casting residue in the area of the mouth of the sprues.
  • the counter-piston during filling of the casting chamber and the actual casting process, in which the casting piston kraftbeaufschlagt moves into the casting chamber down to the closure of the casting chamber below. As soon as the casting material has solidified, the counter-piston is then moved upwards in order to shear off the casting residue in the casting chamber in the region of the mouth of the runner channels and to remove it from the casting chamber.
  • the invention according to the invention the object of improving a Kalthuntdruckg manmaschine of which the Kalthunttikg manmaschine can be performed.
  • This machine should also be improved in structure and function over known machines.
  • liquid casting material is introduced into a bottom-closed vertical casting chamber, which is subsequently pressed into at least one die by inserting a casting piston via at least one casting channel adjoining the casting chamber, the workpiece being removed from the die after a cooling time becomes.
  • the invention then, typically after the cooling time or even before the casting chamber opened down and the casting plunger for removing the casting residue located in the casting chamber down to beyond the at least one runner down, so that the casting residue is removed through a lower opening of the casting chamber.
  • the inventive method and the machine according to the invention are intended in particular for the production of aluminum parts with a central sprue.
  • the basic idea of the process according to the invention is therefore to remove the casting residue, ie. H. a shearing of the casting residue from the material solidified in the runner not by an opposing piston, but to be removed in the downward direction by the casting piston itself.
  • the casting piston continues to move downwards relative to its position at the end of the die casting process, thereby shearing off the sprue or the sprues and pressing the remaining casting residue out of the casting chamber, which is then open at the bottom.
  • This method has the significant advantage that it can be completely dispensed with an opposed piston and the associated control.
  • the Kaltshutting domestic domestic product advantageously takes place simultaneously with two die casting molds which advantageously offset by 180 ° back to back, surrounding the casting chamber are arranged such that their sprues opposite open in the casting chamber, so that they can be filled simultaneously with liquid casting material.
  • the use of two die casting molds has proved to be particularly economical and structurally favorable.
  • the sprue channel or sprue passages are kept closed with liquid casting material when the casting chamber is filled. This ensures that only after pressure buildup in the casting chamber, the sprue channels are opened and thus the liquid casting material can be pressed under pressure into the die or die casting molds. It is provided according to the invention, the sprue or the sprue channels to open only when the casting piston has pressurized the liquid casting material or simultaneously with pressure build-up.
  • the cold chamber pressure casting machine according to the invention which is provided and suitable in particular for carrying out the cold chamber pressure casting method according to the invention, has at least one cavity in at least one die which is connected to the latter via at least one sprue channel which is preferably transverse to the casting chamber. It is provided a casting piston, which enters from above into the vertical casting chamber and in this longitudinally movable.
  • the casting chamber is designed to be open at the bottom and closable beyond the connection of the at least one sprue channel by means of a slide.
  • the slider is thus located below the mouth of the runner or gates in the casting chamber and serves to close the casting chamber down when it is filled and when subsequently the casting piston is shut down to the liquid casting material through the runner into the cavity of Press die to press.
  • this slide - hereinafter referred to as the main spool -, opened, so that the casting chamber is open at the bottom, after which the casting piston is moved to shave the sprue down further, until the casting residue falls out through the lower opening of the casting chamber.
  • the main structural advantage that results from this is that can be completely dispensed with the otherwise conventional piston and the counter piston control required therewith.
  • the provided for closing the casting chamber main slide is advantageously arranged transversely to the otherwise cylindrical casting chamber, thus can absorb relatively high forces that arise during die casting when shutting down the casting piston. Since the shearing off of the sprues takes place by the casting piston itself, comparatively high shearing forces are available here, which enable a reliable and reliable removal of the casting residue from the casting chamber. In this case, the removal of the casting residue is gravity assisted, this falls out of the casting chamber with open main slide down and is either there to collect in a collection container or fed directly to a reuse by a corresponding conveyor.
  • each runner is shut off by means of a slide, such - called gate follower - slide is advantageously arranged transversely to the channel and separates the channel without undercuts over its entire cross-section.
  • This sprue gate valve or these sprue gate valves serve to shut off the casting chamber from the cavity or the cavities during filling of the casting chamber in order to be able to control the filling process by opening the gate valve or gates when the pressure buildup has taken place through the casting piston.
  • the casting chamber is formed widened beyond the main slide, so as to form an ejection opening and to allow falling out of the casting residue from the casting chamber.
  • the slide according to the invention in particular the main slide, designed so that they completely release the G easily screeningquerrough in the open position.
  • the slides can according to the invention as a longitudinal slide, d. H. be formed with a linear travel direction typically transverse to the channel to be closed or as a rotary valve.
  • the slides can be advantageously designed as round or flat slide and typically, but not necessarily, hydraulically controlled.
  • the cold chamber die casting machine according to the invention thus has a casting chamber which is free of opposing pistons, this is functionally replaced by the main slide on the one hand and the casting piston passing through from above.
  • a conveyor device in particular a conveyor belt is provided under the casting chamber, with which the casting residue ejected downwards can be carried away and fed to a further use.
  • Kaltshudruckg foolmaschine corresponds in its basic structure of the prior art and is therefore not described and illustrated here, but only in the areas which relate to the present invention and in which the machine basically differs in their structure from the prior art.
  • the illustrated Kaltshutting domesticmaschine 1 has a vertically arranged cylindrical casting chamber 2, in which a casting piston 3 is movable.
  • the casting piston 3 is connected to a piston rod 4 of a hydraulic cylinder 5, which controls the casting piston 3.
  • the casting chamber 2 Down the casting chamber 2 can be locked by a main slide 6, which has a cylindrical shape, the casting chamber 2 passes completely and without undercuts and is hydraulically controllable. Below the main slide 6, the casting chamber 2 is widened to an ejection opening 7, to which a downwardly further expanded area 8 in the form of a tube connects.
  • the runners 9 each have near their junction in the casting chamber 2 arranged transversely to the respective channel and the channel completely and without undercuts passing through sprue slide 10, with which the respective sprue 9 is shut off.
  • the sprue channels themselves are, as usual in such machines, tapered towards the casting chamber 2 and open at the other end in each case into a cavity 11 of a die casting tool 12, in which the workpiece is formed.
  • the casting chamber 2 is surrounded by the fixed mold parts 13 of the die casting tool 12, which are quasi back to back, so offset by 180 ° about the central longitudinal axis of the casting chamber 2 to each other.
  • Each die casting tool 12 is completed by a movable tool part 14, which in turn is supported in the machine frame.
  • FIGS. 2 to 4 The operation of the machine according to the invention is based on FIGS. 2 to 4 shown, wherein the slide position of the Fig. 2 in Fig. 5 enlarged and the Fig. 4 in Fig. 6 are shown enlarged.
  • the in Fig. 2 shown position of the casting piston 3 is completely moved out of the casting chamber 2 upwards, the two gate valves 10 and the main slide 6 are closed, close that is, the sprue channels 9 or the casting chamber 2 over their entire cross section.
  • the casting chamber 2, which is then open at the top is filled with liquid casting material until the desired filling quantity has been filled.
  • the casting piston 3 is lowered down to the surface of the liquid material from above into the casting chamber 2.
  • the casting piston 3 is subjected to a downward force and the gate valves 10 are opened, wherein the casting piston 3 is moved downwards until the cavities 11 of the die casting tools 12 are completely filled with liquid casting material.
  • the actual casting process does not differ in this respect from the prior art, to which reference is made.
  • the casting piston 3 is moved at the conclusion of die casting to just above the junctions of the sprue 9 in the casting chamber 2 down.
  • the main slide 6 is opened, so that the casting chamber is opened downwards over the ejection opening 7 and the adjoining tube 8. Then, the casting piston 3 is moved beyond the junctions of the sprue 9 in the casting chamber 2 also down, whereby the pouring residue located below the casting piston 3 is sheared relative to the sprues located in the sprues 9 and pushed out through the discharge opening 7 from the casting chamber 2 and through the tube 8 falls down on a non-illustrated conveyor belt over which the casting residue is conveyed away.
  • the tool parts 13 and 14 are moved apart, which removes the workpiece formed in the cavity 11 together with the sprue thereon from the machine.
  • the machine is then removed from the in Fig. 4 position shown again in the Fig. 2 illustrated method by the casting piston 3 is moved upwards out of the casting chamber 2 and the sprue slide 10 and the main slide 6 are moved to their closed position. Then the machine is ready for another die casting process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP18151741.8A 2018-01-15 2018-01-15 Machine de coulée sous pression à chambre froide Active EP3511090B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18151741.8A EP3511090B1 (fr) 2018-01-15 2018-01-15 Machine de coulée sous pression à chambre froide
HUE18151741A HUE061923T2 (hu) 2018-01-15 2018-01-15 Hidegkamrás présöntõ berendezés
PL18151741T PL3511090T3 (pl) 2018-01-15 2018-01-15 Zimnokomorowa, ciśnieniowa maszyna odlewnicza
ES18151741T ES2836523T3 (es) 2018-01-15 2018-01-15 Máquina de fundición a presión de cámara fría

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18151741.8A EP3511090B1 (fr) 2018-01-15 2018-01-15 Machine de coulée sous pression à chambre froide

Publications (2)

Publication Number Publication Date
EP3511090A1 true EP3511090A1 (fr) 2019-07-17
EP3511090B1 EP3511090B1 (fr) 2020-10-28

Family

ID=60972157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18151741.8A Active EP3511090B1 (fr) 2018-01-15 2018-01-15 Machine de coulée sous pression à chambre froide

Country Status (4)

Country Link
EP (1) EP3511090B1 (fr)
ES (1) ES2836523T3 (fr)
HU (1) HUE061923T2 (fr)
PL (1) PL3511090T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947928A (zh) * 2019-12-18 2020-04-03 宁波拓普集团股份有限公司 一种立式挤压机铸造模具
CN115971447A (zh) * 2023-01-05 2023-04-18 重庆美利信科技股份有限公司 一种薄齿散热器的压铸模具和压铸方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750697C (de) * 1938-07-05 1945-01-24 Verfahren bei Pressgiessmaschinen mit einem Presskolben und einem die Presskammer abschliessenden Gegenkolben
CH275204A (de) * 1948-10-01 1951-05-15 Hahn & Kolb Giessmaschine.
DE68913207T2 (de) * 1988-06-13 1994-08-18 Tour & Andersson Ab Vorrichtung und verfahren zum druckgiessen.
EP3053672A1 (fr) 2015-02-04 2016-08-10 Georg Fischer Druckguss GmbH Coulée sous pression de support de jambe de force

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750697C (de) * 1938-07-05 1945-01-24 Verfahren bei Pressgiessmaschinen mit einem Presskolben und einem die Presskammer abschliessenden Gegenkolben
CH275204A (de) * 1948-10-01 1951-05-15 Hahn & Kolb Giessmaschine.
DE68913207T2 (de) * 1988-06-13 1994-08-18 Tour & Andersson Ab Vorrichtung und verfahren zum druckgiessen.
EP3053672A1 (fr) 2015-02-04 2016-08-10 Georg Fischer Druckguss GmbH Coulée sous pression de support de jambe de force

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947928A (zh) * 2019-12-18 2020-04-03 宁波拓普集团股份有限公司 一种立式挤压机铸造模具
CN115971447A (zh) * 2023-01-05 2023-04-18 重庆美利信科技股份有限公司 一种薄齿散热器的压铸模具和压铸方法

Also Published As

Publication number Publication date
HUE061923T2 (hu) 2023-08-28
EP3511090B1 (fr) 2020-10-28
ES2836523T3 (es) 2021-06-25
PL3511090T3 (pl) 2021-07-26

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