EP3919204A1 - Unité de coulée pour une machine de coulée sous pression - Google Patents

Unité de coulée pour une machine de coulée sous pression Download PDF

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Publication number
EP3919204A1
EP3919204A1 EP21175326.4A EP21175326A EP3919204A1 EP 3919204 A1 EP3919204 A1 EP 3919204A1 EP 21175326 A EP21175326 A EP 21175326A EP 3919204 A1 EP3919204 A1 EP 3919204A1
Authority
EP
European Patent Office
Prior art keywords
casting
valve
melt
shut
container
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.)
Pending
Application number
EP21175326.4A
Other languages
German (de)
English (en)
Inventor
Daniel Gerner
Jürgen KURZ
Andreas Sydlo
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.)
Oskar Frech GmbH and Co KG
Original Assignee
Oskar Frech GmbH and Co KG
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 Oskar Frech GmbH and Co KG filed Critical Oskar Frech GmbH and Co KG
Publication of EP3919204A1 publication Critical patent/EP3919204A1/fr
Pending legal-status Critical Current

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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
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • 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
    • B22D17/02—Hot chamber machines, i.e. with heated press chamber in which metal is melted
    • B22D17/04—Plunger machines
    • 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
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • B22D17/203—Injection pistons
    • 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
    • B22D17/28—Melting pots
    • 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
    • B22D17/32—Controlling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
    • B22D39/023—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a displacement member

Definitions

  • the invention relates to a casting unit for a die-casting machine, the casting unit having a casting container with a casting chamber, a casting piston which is arranged axially movable in the casting chamber, a melt bath connection opening, a melt inlet channel from the melt bath connection opening to the casting chamber, and a melt inlet channel discharging from the casting chamber separately from the melt inlet channel
  • the shut-off control valve represents a controllable shut-off valve and has a valve base body arranged on the casting container with a valve seat and a valve closing body which is relatively movable with respect to the valve seat between an open position and a closed position.
  • Such generic and similar casting units are used to provide melt material to be cast in order to cast a specific component, also called a cast part, in a respective casting process or casting cycle.
  • the present casting unit is particularly suitable for metallic die casting, e.g. for casting liquid or partially liquid metal melts, such as zinc, lead, aluminum, magnesium, titanium, steel, copper and alloys of these metals, and here preferably for a hot chamber die casting machine.
  • the casting container is immersed in a melt bath that is held ready by a melt container.
  • the die casting machine can be, for example, a cold chamber die casting machine or a plastic injection molding machine.
  • the melt material is introduced into the casting unit via the melt bath connection opening, for example from a melt bath, and reaches the casting chamber via the melt inlet channel. This is brought about in a melt supply process or melt suction process, typically by means of negative pressure in the casting chamber by a return movement of the casting piston.
  • melt material located in the casting chamber is moved out of the casting chamber and the casting container into a mold cavity, or mold for short, by advancing the casting piston under pressure via the melt outlet channel called, pressed to form a corresponding casting.
  • the melt material after leaving the casting chamber, the melt material reaches a melt inlet in the area of the mold cavity usually formed by a fixed and a movable mold half via a riser pipe area, for example, and via a mouthpiece body attached to the casting container.
  • the piston external dimension of the casting piston corresponds to the internal dimension of the casting chamber, the piston being sealed off from the casting chamber wall.
  • the casting piston pushes the melt material in the casting chamber completely forwards as it moves forward, thereby exerting the necessary pressure on the melt material in order to press the same into the mold cavity.
  • the external dimension of the casting piston is suitably smaller than the internal dimension of the casting chamber, so that the casting piston dips into the melt material of the casting chamber as it moves forward. The pressure on the melt material is brought about in this case by the displacement effect of the plunger volume immersed in the melt material.
  • Casting units with a casting piston of the slide type are, for example, in the laid-open specification WO 91/17010 A1 as well as the patents EP 1 284 168 B1 and EP 2 701 866 B1 disclosed.
  • Casting units with casting pistons of the displacement type are, for example, in the laid-open specification DE 32 48 423 A1 as well as the patents EP 0 576 406 B1 and EP 2 506 999 B1 disclosed.
  • the melt outlet channel leads away from the casting chamber separately from the melt inlet channel, ie the melt inlet channel and melt outlet channel form two separate guide channels for the melt material with a casting chamber inlet at which the melt inlet channel opens into the casting chamber, and a casting chamber outlet that is separate from it opens out of the casting chamber.
  • the melt inlet channel and melt outlet channel form two separate guide channels for the melt material with a casting chamber inlet at which the melt inlet channel opens into the casting chamber, and a casting chamber outlet that is separate from it opens out of the casting chamber.
  • other types of casting units are common.
  • melt inlet channel and the melt outlet channel form a common channel section which is connected to a single connection opening of the casting chamber that functions as an inlet and outlet.
  • two fluid control valves ie controllable fluid valves, are arranged at suitable locations, a changeover control valve and a shut-off control valve.
  • a changeover valve is arranged at an outlet of the casting chamber, which in a first position connects the casting chamber outlet with the melt bath and closes off a riser channel section and in a second position releases the connection from the casting chamber outlet to the riser channel section and closes the casting chamber from the melt pool.
  • the melt is fed into the casting chamber via an annular space between the casting chamber and a piston shaft of the casting piston designed as a slide piston and via a channel section passed through the casting piston, which can be shut off by a shut-off control valve integrated into the casting piston and designed as a check valve.
  • the casting unit disclosed is of the generic type, where the melt inlet channel is formed by a melt supply bore passing through a wall of the cylindrical casting chamber and the shut-off control valve with its valve closing body is arranged directly at the confluence of the melt supply bore into the casting chamber.
  • the casting unit disclosed is also of the generic type, in which case the valve base body is made of all-ceramic material and is precisely inserted into a vertical receiving bore made in this from an upper side of the casting container.
  • a horizontal inlet bore is made in the casting container in an adjoining side area, which on the inlet side forms the melt bath connection opening of the casting unit and on the outlet side is aligned with an inlet bore of the valve base body.
  • the speed of the Advance movement of the casting piston in the mold filling phase cannot be increased beyond a certain amount.
  • the EP 1 284 168 B1 Suggested that at the beginning of the mold filling phase or before the actual mold filling phase in a pre-filling phase, while the mold is still open, the casting piston should be moved forward so that the melt material fills the riser channel area and the mouthpiece body area before the mold is closed and the casting piston is advanced further to carry out the actual mold filling phase will.
  • the casting piston there is of the slide type and functions itself as a shut-off device by releasing it during the refill phase through its return movement behind the casting chamber inlet and shutting it off during the mold filling phase through its forward movement beyond the casting chamber inlet.
  • the technical problem underlying the invention is the provision of a casting unit of the type mentioned at the outset which, compared to the prior art explained above, has advantages in particular with regard to relatively low manufacturing and assembly costs and / or relatively low maintenance / repair costs and / or with regard to provides a reliable function in the casting operation.
  • the casting unit according to the invention has the shut-off control valve for the melt inlet channel, whereby the melt flow in the melt inlet channel can be controlled independently by appropriate control of the shut-off control valve without the casting piston, for example, having to act as a shut-off device.
  • This active control option e.g. manually by the user or automatically by an assigned control unit, distinguishes the shut-off control valve, for example, from a mere non-return valve that only takes its open or closed position in an uncontrolled manner due to the prevailing melt pressure conditions, and accordingly enables the melt flow rate in the melt inlet channel to be actively influenced in a targeted manner .
  • the valve base body of the shut-off valve is accessible from the outside on a valve mounting area on the side of the casting container Hold casting container and has the melt bath connection opening.
  • the term lateral valve assembly area or lateral casting container area is to be understood here as a side area of the casting container which, in the operating position of the casting unit on the die casting machine, is located on the side of the casting container, ie on one side of the casting container that is between an upper side in this operating position, ie Upper side, and a lower side in this operating position, ie underside, of the casting container runs.
  • shut-off control valve or its valve base body that is optimized in terms of manufacturing and assembly effort as well as maintenance / repair effort accessible from the outside of the casting container. It is therefore not normally necessary to disassemble the casting container in order to maintain the shut-off control valve. Furthermore, if the system is designed accordingly, there is the possibility of being able to dismantle the shut-off control valve from the casting container relatively easily accessible from the outside, e.g. to replace a component of the valve that is subject to wear during repair work if necessary.
  • the casting piston is of the slide piston type
  • the shut-off control valve is located with its valve closing body in the melt inlet channel at a fluidic distance on the one hand from the melt bath connection opening and on the other hand from the casting chamber, i.e. the shut-off control valve is neither directly at the melt bath connection opening nor directly at the casting chamber, but at a point of the melt inlet channel between these two end points that is spaced apart from these two end points.
  • valve base body of the shut-off control valve is held on the casting container by a releasable connection.
  • This advantageously makes it possible to simply remove the valve body from the casting container if necessary, e.g. for repair purposes, including the possibility of replacing components of the valve as part of repair or maintenance work.
  • the valve body is held on the casting container in a non-detachable manner, i.e. not detachable in a non-destructive manner. This can be sufficient, for example, for applications in which an exchange of the shut-off control valve or its valve body or other components of the valve does not appear to be necessary during the service life of the casting container.
  • the valve assembly area of the casting container is formed by a valve receiving space with a laterally outwardly facing access side, and the valve body of the shut-off control valve can be inserted laterally from the outside into the valve receiving space via the access side.
  • the positioning of the access side on the side of the casting container, pointing outwards, has proven to be advantageous for assembly-technical and functional reasons. This measure can thus facilitate access to the basic valve body and thus to the shut-off control valve as a whole via the outwardly facing access side of the casting container. This accordingly facilitates the assembly of the shut-off control valve on the casting container and any dismantling of the valve or of its components from the casting container.
  • the access side can be designed as an outwardly open side of the valve receiving space or as a side that is covered by a detachable cover. In the latter case, only the cover needs to be removed from the casting container in order to enable access to the shut-off control valve located in the valve receiving space.
  • the valve assembly area of the casting container is formed, for example, by a valve receiving space with an access side facing outwards on the top or bottom, or it is formed by a side surface of the casting container on which the shut-off control valve with its valve base can be mounted without the casting container having an associated valve receiving space having.
  • the valve base body is inserted into the valve receiving space with a valve outlet pointing downwards, and the melt inlet channel continues from the valve outlet with a channel section leading downwards from the valve receiving space in the casting container.
  • This measure is advantageous in terms of guiding the melt material in the melt inlet channel and the mounting position of the valve base body of the shut-off valve.
  • the indication of the direction downwards here means a direction which, in the operating position of the casting unit on the die casting machine, extends with a main directional component pointing vertically downwards, i.e. parallel to the vertical downwards or with a vertical directional component that is larger than the horizontal directional component obliquely downwards.
  • the shut-off valve can be placed with its valve base body on a valve support surface into which this further channel section opens, whereby it is in fluid connection with the valve outlet.
  • the outlet of the shut-off control valve is not located on the underside, but e.g. on a side area of the valve body, and the melt inlet channel continues in the casting container, e.g. with an initially essentially horizontal channel section.
  • valve base body is held clamped in the vertical direction in the valve receiving space by a releasable clamping connection, and on the underside it rests against a seal sealing the valve outlet.
  • a releasable clamping connection Due to the releasable clamping connection, the shut-off control valve with its valve base body can be reliably held on the casting container and, if necessary, detached from it. With the seal, the valve outlet can be sealed off from the environment in the desired manner, the sealing effect being additionally supported by the fact that the clamping connection presses the valve base body against the seal.
  • the valve base body can be held on the casting container in another way, e.g. by means of a corresponding screw connection.
  • the shut-off control valve has a control rod which is guided in a translationally movable manner on the valve base body and which has the at one end Carries valve closing body and extends with its other end out of the valve body and through a rod passage opening of the casting container out of the casting container.
  • control rod is arranged with its rod longitudinal axis parallel to a longitudinal axis of the casting piston. This represents an arrangement of the control rod which is advantageous in terms of the compact design of the casting unit and in terms of control actuation of the shut-off control valve.
  • the casting unit includes a lateral control rod insertion slot in the casting container for laterally inserting the control rod into the valve receiving space of the casting container and for laterally removing it from the same.
  • the assembly and disassembly of the shut-off control valve on or from the casting container can be facilitated by allowing the control rod and valve closing body to remain on or in the valve base body during disassembly of the valve base body from the casting container, which means that it is not necessary to add the control rod and the valve closing body to be able to dismantle the valve body still mounted on the casting container in order to then be able to remove the valve body from the casting container.
  • the control rod and valve closing body can remain on or in the valve body and inserted into the casting container via the control rod insertion slot for valve assembly or moved out along the valve for valve disassembly.
  • this lateral control rod insertion slot in the casting container is dispensed with and instead the control rod axially inserted into the rod passage opening of the casting container or moved out of it.
  • control rod insertion slot extends and opens from the control rod passage opening in the direction of the lateral access side of the valve receiving space, or that the valve receiving space has a further access side in the longitudinal direction of the control rod insertion slot, via which the valve base body laterally enters the Valve receiving space of the casting container can be used.
  • the melt inlet channel contains at least one transverse bore in the valve body, which forms the melt bath connection opening on the inlet side and opens into a longitudinal bore in the valve body on the outlet side, through which the control rod extends and which forms the valve seat on the outlet side.
  • the melt material stored in a melt container can get into the valve via the one or more transverse bores that run obliquely in the operating position of the casting unit, for example, horizontally or with a horizontal main directional component, and from there via the longitudinal bores under the control of the control rod with the coupled valve closing body Casting containers are introduced in order to supply it to the casting chamber in a controlled manner.
  • the valve base body can have, for example, an inlet bore on the top or bottom for the melt material.
  • the casting unit shown is suitable for use in a die-casting machine, in particular a die-casting machine of the hot chamber type for metallic die-casting, wherein the metallic casting material can be, for example, zinc, lead, aluminum, magnesium, titanium, steel, copper or alloys of these metals.
  • the casting unit contains a casting container 1 with a casting chamber 2, a casting piston 3 arranged axially movably in the casting chamber 2, a melt bath connection opening 4, a melt inlet channel 5 from the melt bath connection opening 4 to the casting chamber 2, a melt outlet channel 6 leading away from the casting chamber 2 separately from the melt inlet channel 5 and a Shut-off control valve 7 for the melt inlet channel 5.
  • the shut-off control valve 7 has a valve base body 8, arranged on the casting container 1, with a valve seat 9 and a valve-closing body 10 that is relatively movable with respect to the valve seat 9 between an open position and a closed position.
  • the valve closing body 10 has a circular disk shape and, corresponding to this, the valve seat 9 is designed with a flat seat surface on the valve base body 8.
  • the valve closing body 10 can have a different shape, for example a truncated cone shape, the valve seat 9 having a respective matching seat shape so that the valve closing body 10 rests fluid-tight against the valve seat 9 in its closed position.
  • the casting piston 3 does not need to be used as a shut-off device for the melt inlet channel 5.
  • the melt inlet channel 5 does not need to open into the casting chamber 2 at a point that can be blocked by the casting piston 3. Since the melt outlet channel 6 discharges from the casting chamber 2 separately from the melt inlet channel 5, it has an opening from the casting chamber 2 that is separate from the opening of the melt inlet channel 5 into the casting chamber 2.
  • the basic valve body 8 as in the example shown, is held on a lateral valve assembly area 11 of the casting container 1 and is accessible from the outside on the casting container and has the molten bath connection opening 4.
  • This measure makes it possible to mount the shut-off control valve 7 with its valve base body 8 laterally from the outside of the casting container 1.
  • the casting piston 3, as in the example shown, is of the slide piston type, and the shut-off control valve 7 is located with its valve closing body 10 in the melt inlet channel 5 at a fluidic distance behind, ie downstream, the melt bath connection opening 4 on the one hand and in front, ie upstream, of the casting chamber
  • the valve closing body 10 is not located directly at the melt bath connection opening 4, which forms an inlet opening of the shut-off control valve 7 for melt material from a melt bath, nor directly at the confluence of the melt inlet channel 5 into the casting chamber 2, but at a suitable point along the Melt inlet channel 5 between these end points of the melt inlet channel 5.
  • the valve base body 8 comprises a base body 8a and a guide body 8b as separately manufactured components.
  • the valve base body 8 is made in one piece or assembled from more than two components.
  • the valve seat 9 is formed on the base body 8a.
  • the molten bath connection opening 4 is also located on the base body 8a.
  • valve base body 8 of the shut-off control valve 7 is held on the casting container by a releasable connection 12, as in the example shown.
  • a releasable connection 12 is realized by a screw connection, in alternative embodiments it can be realized in a different way, for example by a detachable latching or snap connection.
  • valve assembly area 11 of the casting container 1 is formed by a valve receiving space 13 with a laterally outwardly facing access side, and the valve base body 8 of the shut-off control valve 7 is inserted laterally from the outside into the valve receiving space 13 via the access side.
  • this access page is represented by an in Fig. 1 backwards and in Fig. 2 upwardly facing side of the casting container 1 is formed.
  • the valve receiving space 13 is formed with at least one further access side pointing laterally outward, as for example in FIG Fig. 1 a right side of the casting container 1. More specifically, in the exemplary embodiment shown, the valve receiving space 13 is formed by a lateral recess in the casting container 1 with a bottom surface 1a as the lower limit of the valve receiving space 13 and a top-side retaining flange 1b of the casting container 1 as an upper-side closure of the valve receiving space 13, wherein the valve receiving space 13 in this example is accessible from three sides or open on three sides.
  • the shut-off control valve 7 can be placed with its valve base body 8 on the bottom surface 1a, which then functions as a valve support surface.
  • the access side can be used not only for assembly, but also for dismantling the valve base body 8 or the shut-off control valve 7 from the casting container 1.
  • the access side is open; in alternative embodiments, it can be covered by a detachable cover.
  • the basic valve body 8 as in the example shown, is inserted into the valve receiving space 13 with a valve outlet 14 pointing downwards, and the melt inlet channel 5 continues from the valve outlet 14 with a channel section 15 leading downward from the valve receiving space 13 into the casting container 1.
  • the downward direction is based on a position of the casting container 1 that it assumes during operation on the die casting machine, with the Fig. 1 , 3 and 4 show the casting container 1 in this operating position.
  • valve body 8 is in the valve receiving space 13, as in the example shown, by a releasable clamping connection 16 in a vertical position The direction is held clamped, wherein it rests on the underside against a seal 17 sealing the valve outlet 14.
  • the base body 8a and the guide body 8b of the valve base body 8 are arranged one above the other, and the valve outlet 14 is located on the underside of the base body 8a, while the clamping device 16 presses the guide body 8b from above against the base body 8a, which in turn with its The underside surface presses against the seal 17, which rests on the bottom surface 1a of the valve receiving space 13 and surrounds the valve outlet 14 or the inlet of the further channel section 15 that is aligned with it in a closed ring shape.
  • the releasable clamping connection 16 is realized by a screw connection which, as shown, contains two or alternatively only one or more than two screw bolts and associated bores in the retaining flange 1b of the casting container 1 and at the same time forms the releasable connection 12 through which the valve base body 8 on Casting container 1 is held.
  • the releasable connection 12 on the one hand and the releasable clamping connection 16 on the other hand can be formed by two separate releasable connection units.
  • the clamping connection 16 pretensions the valve body 8 in a reliable sealing manner against the seal 17 and at the same time holds the valve body 8 firmly on the casting container 1.
  • the clamping connection 16 or the releasable connection 12 By loosening the clamping connection 16 or the releasable connection 12, the firm hold of the valve base body 8 on the casting container 1 is loosened so that the shut-off control valve 7 can be dismantled from the casting container 1 if necessary.
  • the shut-off control valve 7 has a control rod 18 which is guided in a translationally movable manner on the valve base body 8 and which carries the valve closing body 10 at one end and extends with its other end out of the valve base body 8 and through a rod passage opening 19 of the casting container 1 extends out of the casting container 1.
  • the valve closing body 10 is located at the lower end of the control rod 18.
  • the control rod 18 has a suitable actuation interface via which it can be operated by a User can be induced by hand or automatically by means of a control unit to the desired translational valve actuation movement parallel to its longitudinal axis.
  • the Fig. 1 and 3 show the control rod 18 in its closed position, in which the valve closing body 10 in its closed position rests against the valve seat 9 in a fluid-tight manner and blocks the melt inlet channel 5.
  • Fig. 4 shows the control rod 18 in its open position, in which the valve closing body 10 is in its open position raised or removed from the valve seat 9, thereby releasing the melt inlet channel 5 for the flow of melt material.
  • control rod 18 is arranged with its rod longitudinal axis parallel to a longitudinal axis 20 of the casting piston 3. This allows a control actuation of the control rod 18 on that side of the casting container 1 on which the control actuation of the casting piston 3 preferably also takes place or a corresponding control unit and / or setting unit is arranged. This can be advantageous, for example, with regard to a compact construction of the casting unit and / or with regard to the control of the casting piston 3 and the shut-off control valve 7.
  • the casting unit comprises, as in the example shown, a lateral control rod insertion slot 21 in the casting container 1 for laterally inserting the control rod 18 into the valve receiving space 13 of the casting container 1 and for removing it from the side.
  • the control rod 18 can thereby be inserted into the casting container 1 via the control rod insertion slot 21 during the assembly of the shut-off control valve 7 on the casting container 1, the control rod insertion slot 21 leading to the rod passage opening 19.
  • the control rod 18 therefore does not need to be inserted axially into the rod passage opening 19, and it does not need to be attached to the casting container 1 or to the valve base body 8 after the valve base body 8 has been installed, but can be pre-assembled on the valve base body 8 together with the latter on the casting container 1 will.
  • the control rod 18 can be guided out of the casting container 1 via the control rod insertion slot 21 and can therefore remain on the valve body 8 during this dismantling and does not have to be axially via the rod passage opening 19 of the casting container 1 can be removed.
  • the melt inlet channel 5 contains at least one transverse bore 22 in the valve base body 8, which forms the melt bath connection opening 4 on the inlet side and opens out on the outlet side into a longitudinal bore 23 in the valve base body 8, through which the control rod 18 extends and which on the outlet side the Valve seat 9 forms.
  • several transverse bores 22 are provided at an equidistant angular distance from one another, e.g. two diametrically opposed transverse bores by 180 ° or four cross bores offset by 90 ° in a cross shape, the radially outer openings of the transverse bores 22 jointly forming the melt pool connection opening 4.
  • the at least one transverse bore 22 runs horizontally in the operating position of the casting container 1; in alternative implementations it runs inclined to the vertical.
  • the longitudinal bore 23 runs vertically in the operating position of the casting container 1, in alternative embodiments it runs inclined to the vertical.
  • the at least one transverse bore 22 and the longitudinal bore 23 together with the valve seat 9 are formed in the base body 8a of the valve base body 8.
  • the control rod insertion slot 21 is located in the holding flange 1b of the casting container 1, the control rod insertion slot 21 being located from the access side from which the shut-off control valve 7 or its valve base 8 is mounted on the casting container 1, ie from the one in Fig. 1 rear and in Fig. 2 upper side, to the rod passage opening 19 extends.
  • a closed slot end region of the control rod insertion slot 21 forms the rod passage opening 19 of the casting container 1.
  • the Figs. 3 and 4 illustrate the casting unit in its ready-to-use condition for use in a corresponding die casting machine.
  • the casting container 1 is immersed in a conventional manner in a melt bath 24 which is stored in a melt container 25.
  • the casting container 1 is immersed at least so deeply into the melt bath 24 that the melt bath connection opening 4 of the shut-off control valve 7 mounted on the casting container 1 lies below an associated melt bath level 24a.
  • the melt outlet channel 6 forms a rising channel 6a, which opens out of the casting container 1 with a mouthpiece nozzle 6b, to which a mouthpiece body 26 with an associated end connection area 26a is plugged.
  • the mouthpiece body 26 leads with an outlet-side end region 26b to a sprue opening of a casting mold of the die casting machine.
  • the casting piston 3 in the casting chamber 2 can be moved forward from a starting position, ie into the Figs. 3 and 4 downwards in order to press melt material from the casting chamber 2 via the melt outlet channel 6 and the mouthpiece body 26 into the casting mold, the shut-off control valve 7 being in its in Fig. 3 shown closed position.
  • the Figs. 3 and 4 the melt material is shown as pending up to the exit-side end region 26b of the mouthpiece body 26.
  • the casting piston 3 is moved back in the casting chamber 2 to its starting position, ie into the Figs. 3 and 4 up.
  • the shut-off control valve 7 is in its in Fig. 4 brought the open position shown, so that melt material from the melt bath 24 passes through the melt inlet channel 5 into the casting chamber 2. Subsequently, after closing the shut-off control valve 7, another casting process can be carried out.
  • the invention provides a casting unit for a die casting machine in a very advantageous manner, in which the shut-off control valve for the melt inlet channel is comparatively easily and flexibly attached to the casting container in such a way that it is easily accessible, wherein the shut-off control valve is preferably releasably held on the casting container.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP21175326.4A 2020-06-04 2021-05-21 Unité de coulée pour une machine de coulée sous pression Pending EP3919204A1 (fr)

Applications Claiming Priority (1)

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CN117651618A (zh) 2022-12-23 2024-03-05 浙江海亮股份有限公司 一种浸入式机械控制液面铸造炉及双工位替换阀
WO2024131103A1 (fr) 2022-12-23 2024-06-27 浙江海亮股份有限公司 Four de coulée basé sur une commande de niveau de liquide mécanique par immersion, et valve de remplacement à double station

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CH542012A (de) * 1971-06-16 1973-09-30 Buehler Ag Geb Einrichtung zum Fördern von schmelzflüssigem Material aus einem Tiegel
DE3248423A1 (de) 1982-12-28 1984-06-28 Gebrüder Bühler AG, Uzwil Verfahren zum druckgiessen und druckgiessmaschine zur ausfuehrung dieses verfahrens
WO1991017010A1 (fr) 1990-05-07 1991-11-14 Electrovert Ltd. Mecanisme de vannes utilise dans le coulage d'alliages metalliques a basses temperatures de fusion
EP0576406B1 (fr) 1992-05-26 1997-09-03 Flavio Mancini Pompe pour une machine à couler sous pression à chambre chaude pour coulée d'alliages légers corrosifs
EP1407843A1 (fr) * 2001-06-06 2004-04-14 Kubota Corporation Dispositif d'alimentation en metal en fusion
EP1284168B1 (fr) 2001-08-09 2005-12-28 Oskar Frech GmbH + Co. KG Procédé d'opération d'une machine à couler sous pression en chambre chaude et machine à couler sous pression
EP2506999B1 (fr) 2009-11-30 2017-01-04 Oskar Frech GmbH + Co. KG Ensemble d'injection pour machine a couler sous pression
EP2701866B1 (fr) 2011-04-27 2018-11-14 Oskar Frech GmbH + Co. KG Piston d'injection et unité de coulée à soupape d'arrêt

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JPS52140420A (en) * 1976-05-20 1977-11-24 Toshiba Machine Co Ltd Injection pump device for molten metal
CA1099476A (fr) 1979-03-13 1981-04-21 Remi Frenette Machine de coulee en moule
GB8902120D0 (en) * 1989-02-01 1989-03-22 Frys Metals Ltd Casting apparatus & method

Patent Citations (8)

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Publication number Priority date Publication date Assignee Title
CH542012A (de) * 1971-06-16 1973-09-30 Buehler Ag Geb Einrichtung zum Fördern von schmelzflüssigem Material aus einem Tiegel
DE3248423A1 (de) 1982-12-28 1984-06-28 Gebrüder Bühler AG, Uzwil Verfahren zum druckgiessen und druckgiessmaschine zur ausfuehrung dieses verfahrens
WO1991017010A1 (fr) 1990-05-07 1991-11-14 Electrovert Ltd. Mecanisme de vannes utilise dans le coulage d'alliages metalliques a basses temperatures de fusion
EP0576406B1 (fr) 1992-05-26 1997-09-03 Flavio Mancini Pompe pour une machine à couler sous pression à chambre chaude pour coulée d'alliages légers corrosifs
EP1407843A1 (fr) * 2001-06-06 2004-04-14 Kubota Corporation Dispositif d'alimentation en metal en fusion
EP1284168B1 (fr) 2001-08-09 2005-12-28 Oskar Frech GmbH + Co. KG Procédé d'opération d'une machine à couler sous pression en chambre chaude et machine à couler sous pression
EP2506999B1 (fr) 2009-11-30 2017-01-04 Oskar Frech GmbH + Co. KG Ensemble d'injection pour machine a couler sous pression
EP2701866B1 (fr) 2011-04-27 2018-11-14 Oskar Frech GmbH + Co. KG Piston d'injection et unité de coulée à soupape d'arrêt

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MX2021006673A (es) 2021-12-06
DE102020207016A1 (de) 2021-12-09
US11376656B2 (en) 2022-07-05
CN113751696A (zh) 2021-12-07
US20210379652A1 (en) 2021-12-09
TW202204065A (zh) 2022-02-01
CA3119282A1 (fr) 2021-12-04
JP2021186882A (ja) 2021-12-13

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