EP3511090B1 - Machine de coulée sous pression à chambre froide - Google Patents

Machine de coulée sous pression à chambre froide Download PDF

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Publication number
EP3511090B1
EP3511090B1 EP18151741.8A EP18151741A EP3511090B1 EP 3511090 B1 EP3511090 B1 EP 3511090B1 EP 18151741 A EP18151741 A EP 18151741A EP 3511090 B1 EP3511090 B1 EP 3511090B1
Authority
EP
European Patent Office
Prior art keywords
casting
chamber
die
cold
channel
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.)
Active
Application number
EP18151741.8A
Other languages
German (de)
English (en)
Other versions
EP3511090A1 (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 HUE18151741A priority Critical patent/HUE061923T2/hu
Priority to EP18151741.8A priority patent/EP3511090B1/fr
Priority to ES18151741T priority patent/ES2836523T3/es
Priority to PL18151741T priority patent/PL3511090T3/pl
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 cold chamber die casting machine with the features listed in the preamble of claim 1.
  • liquid metal is dosed into a filling chamber or casting chamber, which is then pressed into the cavity of a die casting mold by applying force to a plunger or casting piston under high pressure, where it is removed from the mold after cooling and freed from the sprue.
  • a plunger or casting piston under high pressure, where it is removed from the mold after cooling and freed from the sprue.
  • the present invention relates to a cold chamber die casting machine with a vertical casting chamber arrangement.
  • the cold chamber die casting machine described there is intended for die casting aluminum parts with a central sprue and has two oppositely arranged die casting molds, each of which has a sprue that opens transversely near the lower end of a vertical casting chamber.
  • This casting chamber is closed on the underside by an opposing piston, the pressure to be applied for the casting process being applied by a casting piston coming from above.
  • the opposing piston serves, on the one hand, to close the casting chamber downwards and, on the other hand, to shear off and eject what is in the casting chamber Casting residue in the area of the mouth of the sprue channels.
  • the opposing piston is located at the bottom when filling the casting chamber and during the actual casting process, in which the casting piston moves downward into the casting chamber under a force, to close the casting chamber. As soon as the casting material has solidified, the opposing piston is then moved upwards in order to shear off the casting residue located in the casting chamber in the area of the mouth of the sprue and to remove it from the casting chamber. Also from the pamphlets DE 750 697 C , DE 689 13 207 T2 and CH 275 204 A Cold chamber die casting machines are known which have casting chambers with opposed pistons.
  • the invention according to the application is based on the object of improving a cold chamber pressure casting method of the aforementioned type and of creating a cold chamber pressure casting machine with which the cold chamber pressure casting method according to the invention can be carried out.
  • This machine should also be improved in structure and function compared to known machines.
  • the cold chamber die casting machine according to the invention is characterized by the features specified in claim 1. Advantageous configurations of the machine are given in the subclaims.
  • liquid casting material is poured into a vertical casting chamber closed at the bottom, which is then pressed into at least one cavity of at least one die casting mold by inserting a casting piston through at least one sprue that adjoins the casting chamber, the workpiece being removed from the die casting mold after a cooling period . Then, typically after the cooling time or even before that, the casting chamber is opened opened at the bottom and the casting piston to remove the casting residue located in the casting chamber moved down beyond the at least one sprue channel, so that the casting residue is removed through a lower opening in the casting chamber.
  • the 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 method is thus to remove the casting residue, i. H. to remove the casting residue from the material solidified in the runner not by means of an opposing piston, but in a downward direction by the casting piston itself.
  • the casting piston moves further downwards compared to its position at the end of the die-casting process, shears off the sprue or sprues and presses the remaining casting residue out of the casting chamber, which is then opened at the bottom.
  • This method has the significant advantage that an opposing piston and the associated control can be completely dispensed with.
  • the use of the casting piston results in a significantly higher shearing force compared to the opposing piston otherwise used, whereby the casting residue can be removed reliably and safely.
  • the cold chamber die casting process is advantageously carried out simultaneously with two die casting molds, which are advantageously offset back to back by 180 °, surrounding the casting chamber in such a way that their sprues open opposite one another into the casting chamber, so that they can be filled with liquid casting material at the same time.
  • the use of two die casting molds has proven to be particularly economical and structurally favorable.
  • the sprue channel or the sprue channels are kept closed when the casting chamber is filled with liquid casting material. This ensures that the sprue channels are only opened after the pressure has built up in the casting chamber and thus the liquid casting material can be pressed into the die or die casting molds under pressure. It is provided that the sprue channel or channels are only opened when the casting piston has pressurized the liquid casting material or at the same time as the pressure build-up.
  • the cold chamber die casting machine which is provided and suitable in particular for performing the cold chamber die casting process described, has at least one cavity in at least one die casting mold, which is connected to the casting chamber via at least one sprue channel, preferably transversely connected to the casting chamber.
  • a casting piston is provided which enters the vertical casting chamber from above and can be moved lengthways in it.
  • the casting chamber is open at the bottom and can be closed by means of a slide beyond the connection of the at least one sprue channel.
  • the slide is thus arranged below the mouth of the sprue (s) in the casting chamber and serves to close the casting chamber at the bottom when it is filled and when the casting piston is subsequently lowered in order to pour the liquid casting material through the sprue into the cavity of the To press die casting tool.
  • this slide - hereinafter referred to as the main slide -, opened so that the casting chamber is open at the bottom, after which the casting piston is moved further down to shear off the sprue until the casting residue falls out through the lower opening of the casting chamber.
  • the main structural advantage that results from this is that the otherwise common opposed piston and the opposed piston control required with it can be completely dispensed with.
  • the main slide provided for closing the casting chamber is arranged transversely to the otherwise cylindrical casting chamber and can thus absorb comparatively high forces that arise during die casting when the casting piston is lowered. Since the sprues are sheared off by the casting piston itself, comparatively high shearing forces are available here, which enable the casting residue to be removed safely and reliably from the casting chamber.
  • the removal of the casting residue is assisted by gravity; it falls downwards out of the casting chamber when the main slide is open and is either collected there in a collecting container or fed directly for further use by a corresponding conveyor device.
  • each sprue channel can be shut off by means of a slide, such a slide - hereinafter referred to as the sprue slide - is advantageously arranged transversely to the channel and separates the channel without undercuts over its entire cross section.
  • This sprue slide or these sprue slides are used to shut off the casting chamber from the cavity or cavities when filling the casting chamber in order to be able to control the filling process in a targeted manner by opening the sprue slide or slides when the pressure has been built up by the casting piston.
  • the casting chamber is designed to be widened beyond the main slide in order to form an ejection opening and to enable the casting residue to fall out of the casting chamber.
  • the slides according to the invention are advantageously designed in such a way that they completely clear the casting chamber cross section in the open position. This should also be the case in the area of the sprue channels, in that case the sprue, which extends over the area of the opened slide, can easily be pulled and removed together with the workpiece.
  • the slide can according to the invention as a longitudinal slide, i. H. be designed with a linear direction of travel typically transverse to the channel to be closed or as a rotary valve.
  • the slides can advantageously be designed as round or flat slides and typically, but not necessarily, be controlled hydraulically.
  • the cold chamber pressure casting machine according to the invention thus has a casting chamber which is free of counter pistons; this is functionally replaced by the main slide on the one hand and the casting piston that travels through from above.
  • a conveying device in particular a conveyor belt, is advantageously provided under the casting chamber, with which the casting residue ejected downwards can be conveyed away and sent for further use.
  • the cold chamber die casting machine shown corresponds in its basic structure to the state of the art and is therefore not described and shown here, but only in the areas that relate to the present invention and in which the machine fundamentally differs in its structure from the state of the art.
  • the cold chamber die casting machine 1 shown 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 can be closed at the bottom by a main slide 6, which has a cylindrical shape, penetrates the casting chamber 2 completely and without undercuts, and is hydraulically controllable. Below the main slide 6, the casting chamber 2 is expanded to form an ejection opening 7, which is adjoined by an area 8 in the form of a tube that is further expanded downwards.
  • two sprue channels 9 open transversely and offset by 180 ° to each other into the casting chamber 2.
  • the sprue channels 9 each have, near their opening into the casting chamber 2, a sprue slide 10 which is arranged transversely to the respective channel and penetrates the channel completely and without undercuts which the respective sprue channel 9 can be shut off.
  • the sprues themselves are designed to taper towards the casting chamber 2 and at the other end each open into a cavity 11 of a die casting tool 12 in which the workpiece is formed.
  • the casting chamber 2 is surrounded by the stationary mold parts 13 of the die casting tool 12, which are arranged back to back, so to speak, offset from one another by 180 ° around the central longitudinal axis of the casting chamber 2.
  • Each die casting tool 12 is closed by a movable tool part 14, which in turn is supported in the machine frame.
  • the casting piston 3 is then subjected to a downward force and the sprue slides 10 are opened, the casting piston 3 being moved downward until the cavities 11 of the die casting tools 12 are completely filled with liquid casting material.
  • the actual casting process does not differ from the state of the art to which reference is made in this respect.
  • the casting piston 3 Upon completion of the die-casting process, the casting piston 3 has moved down to just above the confluence of the sprue channels 9 in the casting chamber 2.
  • the main slide 6 is opened so that the casting chamber is opened downwards via the ejection opening 7 and the pipe 8 connected to it.
  • the casting piston 3 is then moved downwards over the connection points of the sprue channels 9 in the casting chamber 2, whereby the casting residue located below the casting piston 3 is sheared off from the sprues located in the sprue channels 9 and is pushed out of the casting chamber 2 through the ejection opening 7 and through the tube 8 falls down onto a conveyor belt, not shown, via which the casting residue is conveyed away.
  • the tool parts 13 and 14 are moved apart, the workpiece formed in the cavity 11 is removed from the machine together with the sprue located on it.
  • the machine is then extracted from the in Fig. 4 position shown in Fig. 2
  • the method shown in that 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)

Claims (8)

  1. Machine de coulée sous pression à chambre froide, avec une chambre de coulée (2) agencée verticalement, avec au moins une cavité (11) d'au moins un moule de coulée sous pression (12), qui est reliée par canal à la chambre de coulée via au moins un canal d'injection (9) se raccordant à la chambre de coulée (2), et avec un piston de coulée (3) qui peut y être déplacé le long de la chambre de coulée (2), la chambre de coulée (2) étant ouverte vers le bas et pouvant être fermée au-delà du raccordement dudit au moins un canal d'injection (9) au moyen d'un coulisseau principal (6), caractérisée en ce que le coulisseau principal (6) est agencé transversalement à la chambre de coulée sinon cylindrique (2) et en ce que la chambre de coulée (2) est exempte de contre-piston.
  2. Machine de coulée sous pression à chambre froide selon la revendication 1, caractérisée en ce que chaque canal d'injection (9) peut être obturé au moyen d'un coulisseau d'injection (10).
  3. Machine de coulée sous pression à chambre froide selon la revendication 1 ou 2, caractérisée en ce que deux moules de coulée sous pression (12) sont prévus, dont les canaux d'injection (9) débouchent diamétralement opposés dans la chambre de coulée (2).
  4. Machine de coulée sous pression à chambre froide selon l'une quelconque des revendications précédentes, caractérisée en ce que la chambre de coulée (2) est conçue élargie au-delà du coulisseau principal (6) en tant qu'ouverture d'éjection (7).
  5. Machine de coulée sous pression à chambre froide selon l'une quelconque des revendications précédentes, caractérisée en ce que le ou les coulisseaux de coulée (10) fermant le canal d'injection (9) peuvent être déplacés transversalement au canal (9).
  6. Machine de coulée sous pression à chambre froide selon l'une quelconque des revendications précédentes, caractérisée en ce que les coulisseaux (6, 10), en position ouverte, libèrent complètement la section transversale de canal/section transversale de chambre de coulée.
  7. Machine de coulée sous pression à chambre froide selon l'une quelconque des revendications précédentes, caractérisée en ce que les coulisseaux (6, 10) sont réalisés sous forme de coulisseaux ronds ou plats.
  8. Machine de coulée sous pression à chambre froide selon l'une quelconque des revendications précédentes, caractérisée en ce qu'un dispositif de transport, en particulier une bande de transport, est prévue sous la chambre de coulée (2).
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
HUE18151741A HUE061923T2 (hu) 2018-01-15 2018-01-15 Hidegkamrás présöntõ berendezés
EP18151741.8A EP3511090B1 (fr) 2018-01-15 2018-01-15 Machine de coulée sous pression à chambre froide
ES18151741T ES2836523T3 (es) 2018-01-15 2018-01-15 Máquina de fundición a presión de cámara fría
PL18151741T PL3511090T3 (pl) 2018-01-15 2018-01-15 Zimnokomorowa, ciśnieniowa maszyna odlewnicza

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

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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

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110947928B (zh) * 2019-12-18 2022-05-27 宁波拓普集团股份有限公司 一种立式挤压机铸造模具
CN115971447B (zh) * 2023-01-05 2024-09-20 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

Family Cites Families (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.
SE465557B (sv) * 1988-06-13 1991-09-30 Tour & Andersson Ab Saett och anordning foer pressgjutning
EP3053672B1 (fr) 2015-02-04 2019-07-03 Druckguss Service Deutschland GmbH Coulée sous pression de support de jambe de force

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3511090A1 (fr) 2019-07-17
ES2836523T3 (es) 2021-06-25
HUE061923T2 (hu) 2023-08-28
PL3511090T3 (pl) 2021-07-26

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