EP4204169A1 - Vorrichtung zur erstellung zumindest eines metallischen bauteiles und verfahren hierzu - Google Patents
Vorrichtung zur erstellung zumindest eines metallischen bauteiles und verfahren hierzuInfo
- Publication number
- EP4204169A1 EP4204169A1 EP21739913.8A EP21739913A EP4204169A1 EP 4204169 A1 EP4204169 A1 EP 4204169A1 EP 21739913 A EP21739913 A EP 21739913A EP 4204169 A1 EP4204169 A1 EP 4204169A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outlet
- mold
- casting
- casting mold
- outlet 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 title abstract description 3
- 239000002184 metal Substances 0.000 title abstract description 3
- 238000005266 casting Methods 0.000 claims abstract description 241
- 239000000463 material Substances 0.000 claims abstract description 113
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 14
- 230000009969 flowable effect Effects 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000007769 metal material Substances 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 56
- 239000007924 injection Substances 0.000 claims description 56
- 238000005058 metal casting Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 description 16
- 238000001816 cooling Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005755 formation reaction Methods 0.000 description 14
- 238000009826 distribution Methods 0.000 description 10
- 230000035882 stress Effects 0.000 description 9
- 230000000875 corresponding effect Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010119 thixomolding Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- B22D17/007—Semi-solid pressure die casting
-
- 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
- B22D17/2023—Nozzles or shot sleeves
-
- 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
-
- 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
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- 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
- B29C45/20—Injection nozzles
- B29C45/22—Multiple nozzle systems
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/30—Flow control means disposed within the sprue channel, e.g. "torpedo" construction
-
- 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
Definitions
- the invention relates to a device for producing at least one metallic component by injecting flowable, in particular thixotropic, metallic casting material into at least one cavity of a multi-part casting mold, comprising a conveyor device for the flowable metallic material arranged downstream one after the other, a distribution unit, in particular designed as a hot runner system, and a distribution unit the multi-part casting mold, wherein the distributor unit has an inlet channel, which is connected to the conveyor device, and a plurality of outlet channels, each with an outlet nozzle, so that casting material supplied under pressure via the distributor inlet channel can be injected via the outlet nozzles into the at least one cavity of the casting mold in order to to fill at least one cavity with casting material at the same time via the outlet nozzles.
- the invention also relates to a method for producing at least one metallic component, with flowable metallic casting material for forming the metallic component being fed under pressure from a conveyor device via a distributor unit to a multi-part casting mold, with the casting material being fed via at least one inlet channel of the distributor unit to a plurality of outlet channels of the distribution unit and is injected into at least one cavity of the casting mold via outlet nozzles of the outlet channels in order to simultaneously fill the at least one cavity with casting material via the outlet nozzles, characterized in that at least one of the outlet channels is slidably connected to the casting mold in order to prevent a relative movement between the To allow outlet nozzle of the outlet channel and the mold.
- thixomolding process or thixoforming A method has become known in which, as a rule, a metallic casting material, usually an Mg-based alloy, is brought into a thixotropic state in a temperature range between the solidus temperature and the liquidus temperature of the casting material, in particular under shearing stress on the casting material, and in this state is conveyed under pressure with a conveying device a nozzle is pressed into a cavity of a mould.
- a metallic casting material usually an Mg-based alloy
- a distributor unit with a plurality of outlet channels or sprue channels is usually used, via which casting material is simultaneously injected into the cavity with nozzles.
- the casting material which is usually supplied at high temperature and under high pressure, is divided up into a plurality of sprue channels with the distributor unit in such a way that the distributor unit is heated up to a branching point at which the distributor unit branches into the plurality of sprue channels.
- the object of the invention is to specify a device of the type mentioned at the outset, with which a metallic component can be produced with high process reliability and high quality.
- Another goal is to specify a method of the type mentioned at the outset, with which a metallic component can be produced with little wear and high quality.
- the object is achieved according to the invention by a device of the type mentioned at the outset if at least one of the outlet channels is slidably connected to the mold in order to enable relative movement between the outlet nozzle of the outlet channel and the mold.
- the basis of the invention is the idea of counteracting thermal expansion associated with heating of the distributor unit, in particular its outlet channels, not with a modified process control, but with a structural modification of the device. Since at least one, in particular several, of the outlet channels is slidably connected to the casting mold, usually by means of a sliding connection, mechanical stresses generated by the thermal expansion of the distributor unit, in particular mechanical stresses which act on the outlet nozzle, can be reduced or eliminated. In this way, in particular, a mechanical load, in particular a deformation of the outlet channels, sometimes to the point of their destruction, and/or a tilting of the outlet nozzles can be avoided.
- wear of the distributor unit can be reduced or the service life of the device, in particular the distributor unit, can be increased, and an injection process of the casting material into the cavity can be carried out with high and, in particular, consistent quality, especially in the case of cyclic repetition of a manufacturing process for components with the device .
- This enables high process reliability when injecting casting material into the cavity and producing the component in high quality.
- This is particularly true when several, preferably all, of the outlet nozzles are slidably connected to the mold in this way, particularly with such a sliding connection.
- the aforementioned effects can be efficiently achieved if each of the outlet channels is slidably connected to the casting mold in such a way that a respective relative movement between the outlet nozzles and the casting mold is made possible separately from one another.
- the outlet channel is slidably connected to the casting mold or is slidably mounted on it, so that the outlet nozzle of the outlet channel can be displaced transversely or at an angle, in particular orthogonally, to an injection direction of the outlet nozzle relative to the casting mold. This enables efficient compensation of thermal expansions that occur in the distributor unit, in particular in the outlet channels.
- At least one of the outlet channels is connected to the mold in a sliding manner, in particular by means of a sliding connection, so that a relative movement between its outlet nozzle and the mold in a direction transverse, in particular orthogonal, to the injection direction of the outlet nozzle is limited, in order to avoid thermal expansion to allow relative movement between the outlet nozzles caused by the distributor unit.
- an outlet opening of the outlet nozzle of the outlet channel and an injection opening of the casting mold are essentially aligned with one another by sliding movement of the outlet nozzle relative to the casting mold, in order to inject casting material through the outlet opening via the injection opening into the to inject cavity. Because the outlet nozzle is aligned in this way relative to the injection opening of the casting mold, high precision can be achieved when filling the cavity.
- the at least one outlet nozzle is aligned relative to an injection opening of the casting mold, via which injection opening at the casting temperature of the distributor unit the outlet nozzle can be used to inject casting material into the cavity of the casting mold, such that a sliding movement of the outlet nozzle relative to the casting mold creates an im essential aligned or centric alignment of an outlet opening of the outlet nozzle and the injection opening at the casting temperature of the distribution unit or the outlet channel is assumed.
- the outlet opening of the outlet nozzle is not aligned or eccentric to the injection opening at the non-casting temperature of the distributor unit or the outlet channel, in particular room temperature, and at the pouring temperature of the distributor unit or the outlet channel, if casting material can be injected into the casting mold, is shifted by sliding into an aligned or central position.
- the casting material can be injected into the cavity with the outlet nozzle in a predetermined manner, in particular with a precise angular orientation, as a result of which casting errors can be reduced or avoided.
- the non-casting temperature usually refers to a temperature that is lower than the casting temperature, at which no casting material is injected via the distributor unit or the outlet channel or this is not filled with free-flowing casting material.
- a robust connection is achievable when the outlet duct and the mold are slidably connected to one another with a positive fit, allowing limited relative movement between the outlet nozzle of the outlet duct and the mold in a direction transverse to the injection direction of the outlet nozzle.
- a form fit is a connection through spatial confinement. It is expedient if the form fit or the positive connection is designed in such a way that the relative movement between the outlet nozzle and the casting mold is limited in several directions, in particular in directions aligned orthogonally to one another or along such axes. The directions or axes usually lie in one plane, mostly orthogonal to the injection direction of the respective nozzle. In this way, the sliding connection with such a form fit between the outlet channel and the casting mold can be designed in a simple and resilient manner.
- the outlet channel has an outer diameter that varies along its longitudinal axis in order to form the form fit between the outlet channel and the casting mold.
- a resilient, form-fitting connection between the outlet channel and the casting mold can be produced in a simple manner.
- the casting mold has a connecting element or a receptacle which engages behind an area of the outlet channel or in an area of the Outlet channel engages with a reduced outer diameter and causes a form fit in this way.
- the outlet channel has a formation, in particular running along a circumference of the outlet channel, in order to form the form fit between the outlet channel and the casting mold. It can expediently be provided that the formation is inserted in a form-fitting manner into a receptacle of the casting mold and can be slidably moved in this.
- the connection is particularly robust if the formation runs in a ring shape along the circumference of the outlet channel. As a result, loads acting on the formation, in particular tensile loads in the axial direction of the outlet channel or its outlet nozzle, can be distributed evenly over the circumference of the outlet channel. Alternatively, several formations can also be arranged along the circumference of the outlet channel in order to achieve the same effects.
- such a formation can be arranged on the casting mold and, for example, a receptacle can be arranged on the outlet channel in order to implement a connection with a corresponding effect.
- a connection with any specific configuration is sufficient, as long as the formation is spatially enclosed, which allows sliding according to the invention.
- the sliding connection is established when a preferably flat contact surface is arranged on an end piece of the outlet channel that has the outlet nozzle, which contact surface rests slidably on a support surface of the casting mold that corresponds to the contact surface, in order to slidably connect the outlet channel to the casting mold.
- This enables the sliding connection to be formed with few errors.
- the outlet channel and the casting mold are connected in a casting material-tight manner or if the sliding connection is designed in a cast-material-tight manner. This can be implemented particularly efficiently with the aforementioned contact surface and bearing surface lying one on top of the other.
- a sealing element in particular several such, be arranged between the contact surface and the bearing surface in order to achieve a sealing of the casting material.
- the sealing element can be formed with metallic material, for example copper, or ceramic material.
- the sealing element is often designed as a sealing ring. It is favorable for robust sliding if an outlet nozzle opening of the outlet nozzle is bordered or surrounded by the contact surface. This applies in particular in a cross section through the outlet nozzle. This makes it easy to implement direction-independent sliding in particular. It has proven useful for this if the outlet nozzle or the outlet nozzle opening opens into the contact surface.
- a high level of practicability can be achieved if the end piece of the outlet channel is inserted into an end bush, in particular in a detachable manner, the end bush representing an enlargement of an outer diameter of the outlet channel in order to connect the outlet channel in a sliding manner with the casting mold, in particular with the formation of the form fit.
- the form fit can be established in a simple manner. It is practical if the end socket forms the contact surface.
- the end bushing is usually designed in such a way that it encompasses or surrounds the end piece of the outlet channel at least in sections, preferably completely.
- the end bushing encompasses in particular a side of the end piece facing the casting mold, so that the end bushing forms the contact surface when the end piece is in a state in which it is connected to the casting mold.
- the end socket can be designed, for example, as a cup-like attachment which is attached to the outlet channel, with a base of the attachment having a passage corresponding to the outlet nozzle, through which casting material can be passed with the outlet nozzle.
- the outlet nozzle is usually at least partially, in particular completely, inserted into the passage or guided through it or opens into the passage.
- the end bush can expediently be connected to the outlet channel or the end piece in a form-fitting and/or force-fitting and/or material-to-material manner or be designed as part of this.
- the end bushing is detachably connected to the outlet channel or its end piece.
- the end bushing as a part subject to wear, can be easily serviced and/or replaced as a result.
- the end bushing can a robust form fit can be implemented in a simple manner, which allows the sliding connection to slide.
- the aforementioned press connection or friction connection between the contact surface and the bearing surface can be implemented, preferably in an adjustable manner, by pressing the end piece or the end bushing against the casting mold with a fixing element.
- a usually detachable, form-fitting and/or force-fitting connection can be provided between the end bushing and the fixing element.
- a robust construction can be achieved if the casting mold has a receptacle designed as a depression in the casting mold, into which the end piece, optionally the end bushing, is inserted at least partially, in particular completely, to produce the positive connection.
- an unintentional escape of casting material between the end piece and the outer surface of the casting mold can thus be efficiently prevented or a potential risk in this respect can be minimized.
- the respective injection opening of the casting mold, via which casting material can be injected into the cavity with the respective outlet nozzle, is generally arranged in a bottom surface of the receptacle.
- the supporting surface, on which the contact surface lies in a sliding manner is formed with a surface delimiting the receptacle, for example the bottom surface or a wall surface of the receptacle.
- the end piece is usually releasably inserted into the receptacles in a form-fitting manner.
- the closure device can expediently have a closure element which engages behind the formation or the end bushing, in particular releasably, in order to produce the positive connection.
- the closure element encloses an outer circumference of the outlet channel or its end piece in order to fix the formation or end bushing.
- the closure element has a feed-through opening through which the outlet channel or its end piece is passed, with the feed-through opening having an inner width or an inner diameter which is smaller than an outer width or an outer diameter of the outlet channel or .of the end sleeve to connect it(s) positively and slidably.
- the positive connection can be canceled by moving, in particular shifting or pivoting, the closure element relative to the casting mold in order to release the end piece or the end bushing from the casting mold.
- a connection between the closure element and the casting mold is implemented with a screw connection or a similarly expedient detachable connection.
- the receptacle can be at least partially closed with the closure device in order to fix the end piece or the end bushing in a form-fitting, in particular detachable, slidable manner in the receptacle or to enclose it in it.
- the aforementioned fixing element can expediently be formed with the closure element.
- a cooling device is present in order to cool the end sleeve and/or the casting mold, in particular the receptacle.
- sliding of the sliding connection in particular sliding between the contact surface and bearing surface, can be made possible independently of the operating state or the temperature of the casting material.
- This is expedient in order to ensure precise positioning or alignment of the outlet nozzles relative to the cavity or injection opening in a reproducible manner. In particular, this can prevent casting material from escaping between the outlet channel and the casting mold, in particular along the contact surface, as a result of the casting material escaping from solidifying.
- the cooling device can be formed with one or more cooling channels through which a coolant can flow.
- end bushing and the casting mold or receptacle are usually arranged in or inside the end bushing or a wall forming the casting mold or receptacle. It is advantageous if the end bushing and the casting mold or receptacle can be cooled separately from one another or if the end bushing or casting mold each has its own cooling device, for example cooling channels that can be controlled separately from one another. However, it is often sufficient if the end sleeve and casting mold are cooled by a common cooling device or by one or more common cooling channels.
- At least one temperature control device is present, with which the temperature of the outlet channels can be controlled, in particular can be heated or cooled.
- a casting material located in the outlet channels can be brought to an injection temperature, usually after or before an injection process is carried out. It has proven useful if the outlet channels are tempered in such a way that the casting material in the outlet channels is kept in a free-flowing state, to be injected into the mold in a subsequent state. It is favorable if the casting material located in the outlet channels is not kept solidified or free-flowing, in particular during the entire period between two injection processes.
- the thermal expansions associated with such a time-extended heating of the distributor unit or outlet ducts and the associated mechanical stresses can advantageously be compensated to a significant extent by the sliding connection between the outlet ducts and the casting mold.
- the distributor unit or the outlet ducts can expediently be designed as a hot runner system in which casting material located in the distributor unit or the outlet ducts is kept flowable between two injection processes or injection cycles. It is usually expedient that after an injection process a plug is formed in the outlet nozzle by solidification of casting material, which plug closes the outlet nozzle.
- the temperature control device is designed as a heating device and/or cooling device.
- the temperature control device can be formed with one or more temperature control channels through which a temperature control medium, for example a heating medium or coolant, can flow in order to control the temperature of the outlet channels or the outlet nozzle, in particular to heat or cool them.
- a temperature control medium for example a heating medium or coolant
- the temperature control device can be formed with one or more electrical resistance heaters. It has proven particularly useful, in particular alternatively or cumulatively, if the temperature control device is designed with an electric induction heater in order to heat the casting material located in the outlet channels by means of electric induction.
- aforementioned temperature control devices are arranged along the outlet channels. It is particularly favorable if temperature control of the outlet nozzle and an outlet channel segment or outlet channel segments of the outlet channel leading to it downstream can be controlled separately from one another. As a result, in particular, the formation of plugs in the outlet nozzle and the maintenance of a free-flowing state of a further or remaining casting material in the outlet channel can be avoided be precisely controlled separately from each other. This can be implemented in practice if the temperature of the outlet nozzle and outlet nozzle segments can be controlled using separate, in particular different, aforementioned temperature control devices. It has proven particularly useful if the outlet nozzle or the casting material located therein can be heated with at least one induction heater.
- an injection process and/or slug formation after an injection process can be controlled particularly precisely.
- an electrical induction heater in particular several such, preferably surrounding a channel guide of the outlet nozzle circumferentially, can be arranged on the end piece or in the area of the outlet nozzle.
- the outlet channels, in particular outlet nozzles can be temperature-controlled separately from one another.
- several aforementioned temperature control devices which are usually arranged on different outlet channels or outlet nozzles, can be present.
- At least one of the outlet channels is formed with a plurality of longitudinal segments connected to one another or adjoining one another, the longitudinal axes of which are at an angle to one another in order to deflect casting material with the longitudinal segments.
- the casting material can be deflected with the distributor unit in a practical manner in order to divide the casting material over a number of outlet channels.
- the longitudinal segments are designed to directly adjoin one another, although it is also possible for them to adjoin one another indirectly, for example via intermediate elements. It is expedient if several, often all, outlet channels are designed in this way. It is favorable here if two longitudinal segments adjoining one another have longitudinal axes which form an obtuse angle.
- outlet channels are aligned symmetrically, in particular rotationally symmetrically or mirror-symmetrically, with respect to a mirror axis.
- a load or relative movement between the outlet channels can be reduced, so that, in combination with the sliding connection provided, an injection process that can be carried out particularly precisely and with little mechanical load can be implemented.
- the outlet ducts are usually formed with tubes which are usually connected to one or more common inlet ducts of the distributor unit in a way that conducts the casting material.
- the inlet channel can also be expediently formed with a tube.
- the distributor unit is formed with a distributor body, the distributor body having at least one inlet channel section and a plurality of outlet channel sections connected thereto for casting material, so that the casting material conducted into the inlet channel section is passed on via the outlet channel sections.
- further outlet channel pieces formed with tubes are then connected to the outlet channel sections in order to forward casting material conducted via the outlet channel sections to the casting mold, in particular in the aforementioned manner.
- the distributor body can also have a plurality of such inlet channel sections which are connected to the outlet channel sections in a manner which conducts the casting material. By branching the casting material into a number of outlet channels within the distributor body, mechanical stresses and thermal expansions can be distributed particularly evenly.
- the distributor body can expediently have one or more of the aforementioned temperature control devices.
- outlet channels in particular if they are formed with tubes, are spaced apart from one another in a direction transverse to a longitudinal axis of the tubes. This allows a sliding movement of the exhaust ports or outlet nozzles are carried out relative to the mold with particularly little mutual interference.
- the sliding connection allows a movement of the outlet nozzle relative to the mold in a direction transverse, in particular orthogonal, to the injection direction of the outlet nozzle of several mm, usually at least 2 mm, usually at least 3 mm, often at least 4 mm, preferably at least 5mm
- a movement can also be at least 8 mm, at least 10 mm or at least 15 mm.
- the further object of the invention is achieved with a method for producing at least one metallic component of the type mentioned at the outset, if at least one of the outlet channels is connected in a sliding manner to the casting mold in order to prevent a relative movement between the outlet nozzle of the outlet channel and the casting mold, in particular in a transverse direction to the injection direction of the outlet nozzle.
- at least one of the outlet channels is slidably connected to the mold with a sliding connection, so that a relative movement between its outlet nozzle and the mold in a direction transverse to the injection direction of the outlet nozzle is limited. A relative movement between the outlet nozzles caused by thermal expansion of the distributor unit can thereby be made possible.
- a component with high process reliability and high component quality can be produced in this way.
- wear and tear on the distributor unit can be reduced and an injection process of the casting material into the cavity of the casting mold can be carried out with high, constant quality. Accordingly, several or all of the outlet channels are advantageously connected to the casting mold in a sliding manner in this way.
- the casting material can be guided with the outlet channels to one or more cavities of a casting mold in order to produce one or more components.
- the outlet channels are usually implemented as runners. It has proven to be particularly favorable if a number of outlet channels, in particular all outlet channels, lead casting material to a common cavity. As a result, the cavity can be filled simultaneously via a plurality of outlet nozzles or injection openings, as a result of which efficient filling of the cavity with few casting defects can be achieved.
- the cavity is usually filled at the same time with several spaced-apart outlet nozzles. If outlet nozzles are slidably connected to the mold, mechanical stresses acting on the outlet nozzles can be compensated for by sliding the outlet nozzles relative to the mold in a direction transverse or angular, in particular orthogonal, to the respective injection direction.
- a plug formed with solidified casting material is formed, but that the casting material upstream of the plug is kept flowable in the outlet channels by heating in order to prevent the casting material in the outlet channels from completely solidifying.
- this can be done with a temperature control device, in particular a heating device, in order to heat the casting material.
- a casting material located in the outlet nozzle solidifies or is solidified in order to form a plug, which prevents a free-flowing casting material located in the outlet channel downstream of the plug from escaping.
- a free-flowing casting material placed in front of the plug in the outlet channel is usually heated in order to prevent it from solidifying until the next injection process or until the next component is produced.
- the lasting thermal stress associated with the heated casting material and the associated thermal expansion of the distributor unit or the outlet channels can be compensated to a large extent with the sliding connection between the at least one outlet channel and the casting mold.
- a particularly high level of casting precision can be achieved if a sliding movement of the outlet nozzle relative to the casting mold is carried out, so that at the casting temperature of the outlet channel, an outlet opening of the outlet nozzle of the outlet channel and an injection opening of the casting mold are aligned with one another in order to inject casting material through the outlet opening via the injection opening into the to inject cavity.
- the sliding movement usually takes place as a result of thermal expansion of the distributor unit, in particular the outlet channel, or when the distributor unit or the outlet channel heats up.
- the at least one outlet nozzle is aligned relative to an injection opening of the casting mold, via which casting material is injected into the cavity with the outlet nozzle at the casting temperature of the distributor unit or the outlet channel, in such a way that a sliding movement of the outlet nozzle relative to the casting mold is carried out, so that at the casting temperature an aligned or central position is taken between an outlet opening of the outlet nozzle and the injection opening.
- the at least one outlet nozzle is aligned relative to the injection opening of the casting mold in such a way that the outlet opening of the outlet nozzle is eccentric to the injection opening at the non-casting temperature, in particular room temperature, and at the casting temperature at which casting material can be injected into the casting mold or onto which the outlet channels are heated, is or is displaced by sliding into an aligned or centric or concentric position.
- the casting temperature is usually several hundred °C, often around 600 °C, for example in the case of casting material formed with a magnesium alloy.
- the relative displacement between the outlet channel and the mold associated with thermal expansion is usually several mm.
- Fig. 1 is a schematic representation of a device for producing a metallic
- 2 shows a schematic three-dimensional representation of a distribution unit
- 3 shows a schematic representation of a distributor unit in a longitudinal section through the distributor unit
- FIG. 5 shows a schematic representation of a casting mold with a receptacle corresponding to the end piece of FIG. 4, into which the end piece can be inserted to form a sliding connection;
- FIG. 6 is a schematic representation of the end piece of FIG. 4 inserted into the receptacle of FIG. 5.
- FIG. 6 is a schematic representation of the end piece of FIG. 4 inserted into the receptacle of FIG. 5.
- a device 1 shows a schematic representation of a typical device 1 for producing a metallic component 2 by injecting flowable, in particular thixotropic, metallic casting material into a cavity 4 of a multi-part casting mold 3.
- a device 1 usually comprises a filling chamber, also referred to as a barrel, a conveyor unit, often designed as a screw conveyor, downstream of the filling chamber, a distribution unit, via which casting material is conveyed under pressure from the conveyor device 5 formed with the filling chamber and conveyor unit to the casting mold 3 in order to inject the casting material into the cavity 4 of the casting mold 3 and the distribution unit 6 downstream of the casting mold 3.
- the distributor unit 6 has at least one inlet channel 7, which is connected to the conveyor, and several outlet channels 8, which are connected to the casting mold 3 in parallel with the cavity 4 of the casting mold 3 via the outlet channels 8 to fill casting material.
- each outlet channel 8 has an outlet nozzle 9 with which casting material can be injected into the cavity 4 via an injection opening 10 of the casting mold 3 corresponding to the respective outlet nozzle 9 .
- Such a distribution unit is shown schematically in FIG. 2 or FIG. 3, for example.
- the multi-part casting mold 3 is usually formed with an immovable first plate and a second plate which is movable relative to the first plate. Surfaces of the first plate and/or second plate have a negative form of the component 2 to be created.
- the outlet nozzles 9 usually connect to the first plate, so that casting material can be injected into the cavity 4 via an outlet nozzle opening of the respective outlet nozzle 9 .
- the filling chamber generally has a heater with which the casting material is converted into a thixotropic state, usually with simultaneous shearing of the casting material with the screw conveyor. Subsequent injection of the material via the outlet nozzles 9 into the cavity 4 of the casting mold 3 is usually effected by an axial forward movement of the screw conveyor in the direction of the distribution unit 6 or outlet nozzles 9.
- Fig. 1 shows a process state after the component 2 has been allowed to solidify in the casting mold 3.
- plugs of solidified casting material are usually formed in the outlet nozzles 9 in order to form a flowable casting material upstream of the plugs to prevent an exit from the outlet nozzles 9.
- the casting mold 3 is open, and the component 2 produced is removed from the casting mold 3 with a robot arm.
- a respective plug of this type is usually also pressed or shot into the cavity 4 in a next production cycle when casting material is pressed into the mold for the production of a next component 2 .
- FIG. 2 and FIG. 3 show schematic representations of a distributor unit 6 as can be used, for example, in a device 1 of FIG. 1 .
- the distributor unit 6 has an inlet duct 7 and two outlet ducts 8 in order to supply casting material supplied via the inlet duct 7 to the casting mold 3 via the outlet ducts 8 .
- the outlet channels 8 each have an outlet nozzle 9 via which casting material can be injected into the cavity 4 .
- the outlet ducts 8 are formed with pipes which are connected to the inlet duct 7 in a conductive manner with casting material.
- Different outlet channels 8 are generally spaced apart from one another in a direction transverse to a longitudinal axis of the outlet channels 8 in order to minimize mutual interference, for example due to mechanical forces and/or thermal expansion that occur.
- the distributor unit 6 can be formed with a distributor body 11 having an inlet channel section and two outlet channel sections, in order to distribute the casting material supplied via the inlet channel section to the outlet channel sections.
- the inlet duct section and the outlet duct sections are usually at a common crossing point cast material connected to each other.
- Outlet channel parts formed with tubes usually connect to the outlet channel sections in order to convey casting material to the mold 3 .
- the distributor body 11 can expediently have one or more heating devices 24 .
- the outlet channels 8 are each connected to the casting mold 3 in a sliding manner with a sliding connection in order to prevent a relative movement between the respective outlet nozzle 9 and the casting mold 3 in a direction transverse to the longitudinal axis of the To allow outlet channels 8 or injection direction of the outlet nozzle 9 . In this way, mechanical stresses caused by thermal expansion can be reduced in the form of a relative movement between the outlet nozzles 9 or outlet channels 8 .
- FIG. 4 shows an end piece 13 of an outlet duct 8, having an outlet nozzle 9.
- the outlet ducts 8 of FIGS. 1 to 3 can expediently be designed in this way.
- the end piece 13 has a temperature control device, which is preferably designed as an induction heater 14 in order to temperature control, in particular to heat, the casting material located in the outlet nozzle 9 .
- the end piece 13 of the outlet channel 8 is inserted into an end bushing 15 which positively surrounds a circumference of the outlet channel 8 with a first end bushing section 16 and surrounds a side of the outlet channel 8 facing the mold 3 with a second end bushing section 17 .
- the first end bushing section 16 causes an increase in an outer diameter of the end piece 13 in order to connect the end piece 13 to the mold 3 in a form-fitting manner.
- the second end sleeve section 17 forms a contact surface 18 in order to place it slidingly on a bearing surface 19 corresponding to the contact surface 18 .
- the end sleeve 15 can expediently be designed in the shape of a cup, with a cup bottom of the cup having a passage into which the outlet nozzle 9 opens or through which the outlet nozzle 9 is at least partially guided. As can be seen in FIG. 4, it is favorable if the end sleeve 15 is cooled with a cooling device, for example cooling channels 12.
- FIG. 5 shows a schematic representation of a section of a casting mold 3, for example a casting mold 3 according to FIG. 1.
- the casting mold 3 has a receptacle 20 corresponding to the end piece 13 of FIG Formation of a sliding connection can be inserted in a form-fitting manner.
- the receptacle 20 is usually designed as a depression in the casting mold 3, with an injection opening 10 of the casting mold 3, via which casting material can be injected into the cavity 4 with the outlet nozzle 9, being arranged in a bottom surface of the receptacle 20.
- the casting mold 3 or its receptacle 20 has a locking device 21 with which the receptacle 20 can be closed in such a way that an end bushing 15 inserted into the receptacle 20 is positively enclosed in the receptacle 20 so that a sliding movement of the end bushing 15 in the receptacle 20 transversely, in particular orthogonally, to the injection direction of the outlet nozzle 9 of the end piece 13 is made possible.
- the closure device 21 can expediently be releasably connected to a part of the casting mold 3 with a screw connection. Also evident in FIG.
- the casting mold 3 is a plug receptacle 22 which is formed opposite the injection opening 10 as part of the cavity 4 in order to accommodate a plug shot out of the outlet nozzle 9 when casting material is injected into the casting mold 3 .
- the casting mold 3 usually has an ejector unit 23 with which a component 2 solidified in the cavity 4 can be pushed out of the cavity 4 by moving the ejector unit 23 .
- the casting mold 3 generally has one or more cooling devices, usually in the form of cooling channels 12, in order to cool the casting mold 3.
- the casting mold 3 and the end bushing 15 preferably have cooling channels 12 that can be controlled separately from one another, or each have their own cooling device.
- Fig. 6 shows a schematic representation of the end piece 13 of the outlet channel 8 of Fig. 4, which is inserted in a form-fitting manner into the receptacles 20 of Fig. 5, so that a sliding movement of the end piece 13 in one or more directions of movement G transverse to the injection direction of the outlet nozzle 9 of the end piece 13 is enabled.
- An outlet opening of the outlet nozzle 9 is aligned centrally to the injection opening 10 of the casting mold 3 in order to inject casting material into the cavity 4 via the outlet nozzle 9 .
- the casting mold 3 preferably has a plurality of such receptacles 20 in order to positively fit an end piece 13 or an end bushing 15 of one of the outlet channels 8 into it insert, so that the respective end piece 13 is slidably movable in a direction transverse to the shooting direction of the respective outlet nozzle 9.
- each of the outlet channels 8 is slidably connected to the mold 3 in this way. Since at least one of the outlet channels 8, usually all outlet channels 8, is slidably connected to the casting mold 3, so that the respective outlet nozzle 9 can be moved in a direction transverse to its injection direction relative to the casting mold 3, thermal expansions of the distributor unit 6 or the outlet channels that occur during operation can be prevented 8 to be compensated. Impairments of an injection process can be minimized or prevented as a result of which a metal component 2 can be produced with high process reliability and high quality.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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ATA50731/2020A AT524484A1 (de) | 2020-08-31 | 2020-08-31 | Vorrichtung zur Erstellung zumindest eines metallischen Bauteiles und Verfahren hierzu |
PCT/AT2021/060235 WO2022040707A1 (de) | 2020-08-31 | 2021-07-05 | Vorrichtung zur erstellung zumindest eines metallischen bauteiles und verfahren hierzu |
Publications (1)
Publication Number | Publication Date |
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EP4204169A1 true EP4204169A1 (de) | 2023-07-05 |
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ID=76859333
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EP21739913.8A Pending EP4204169A1 (de) | 2020-08-31 | 2021-07-05 | Vorrichtung zur erstellung zumindest eines metallischen bauteiles und verfahren hierzu |
Country Status (6)
Country | Link |
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US (1) | US20230311200A1 (de) |
EP (1) | EP4204169A1 (de) |
JP (1) | JP2023539479A (de) |
CN (1) | CN116583364A (de) |
AT (1) | AT524484A1 (de) |
WO (1) | WO2022040707A1 (de) |
Families Citing this family (1)
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CN117399574B (zh) * | 2023-12-13 | 2024-03-01 | 泰州市华盛消防装备有限公司 | 一种消防管件的铸造模具 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2453170C (en) * | 2002-12-20 | 2012-02-21 | Mold-Masters Limited | Lateral gating injection molding apparatus |
US7387154B2 (en) * | 2006-02-24 | 2008-06-17 | Husky Injection Molding Systems Ltd. | Metallic-molding-material runner having equilibrated flow |
US7614869B2 (en) * | 2007-05-08 | 2009-11-10 | Mold-Masters (2007) Limited | Manifold nozzle connection for an injection molding system |
DE102008017931A1 (de) * | 2008-04-08 | 2009-10-15 | Psg Plastic Service Gmbh | Heißkanaldüse mit anlagefreier Vorzentrierung |
US7845936B2 (en) * | 2009-01-21 | 2010-12-07 | Mold-Masters (2007) Limited | Sealing arrangement for an edge gated nozzle in an injection molding system |
DE102009044506B4 (de) * | 2009-11-12 | 2014-05-28 | Zhafir Plastics Machinery Gmbh | Düsenanpressvorrichtung einer Spritzgiessmaschine |
DE102014009437A1 (de) * | 2014-06-25 | 2016-01-21 | Otto Männer Innovation GmbH | Modulare Seitenangießdüse und Gießform |
DE202016004378U1 (de) * | 2015-07-15 | 2016-10-19 | Otto Männer GmbH | Heißkanalsystem zum seitlichen Angießen mit einem Düsenschmelzeverbinderteiler |
-
2020
- 2020-08-31 AT ATA50731/2020A patent/AT524484A1/de unknown
-
2021
- 2021-07-05 EP EP21739913.8A patent/EP4204169A1/de active Pending
- 2021-07-05 JP JP2023513167A patent/JP2023539479A/ja active Pending
- 2021-07-05 WO PCT/AT2021/060235 patent/WO2022040707A1/de active Application Filing
- 2021-07-05 US US18/022,641 patent/US20230311200A1/en active Pending
- 2021-07-05 CN CN202180073378.2A patent/CN116583364A/zh active Pending
Also Published As
Publication number | Publication date |
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AT524484A1 (de) | 2022-06-15 |
JP2023539479A (ja) | 2023-09-14 |
US20230311200A1 (en) | 2023-10-05 |
CN116583364A (zh) | 2023-08-11 |
WO2022040707A1 (de) | 2022-03-03 |
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