EP0691166A1 - Procédé et dispositif de moulage par injection - Google Patents

Procédé et dispositif de moulage par injection Download PDF

Info

Publication number
EP0691166A1
EP0691166A1 EP95110065A EP95110065A EP0691166A1 EP 0691166 A1 EP0691166 A1 EP 0691166A1 EP 95110065 A EP95110065 A EP 95110065A EP 95110065 A EP95110065 A EP 95110065A EP 0691166 A1 EP0691166 A1 EP 0691166A1
Authority
EP
European Patent Office
Prior art keywords
die
molten metal
injection
plunger
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP95110065A
Other languages
German (de)
English (en)
Inventor
Sergio Campani
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.)
Tcs Molding Systems SpA
Original Assignee
Tcs Molding Systems SpA
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 Tcs Molding Systems SpA filed Critical Tcs Molding Systems SpA
Publication of EP0691166A1 publication Critical patent/EP0691166A1/fr
Ceased legal-status Critical Current

Links

Images

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
    • B22D17/20—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
    • 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

Definitions

  • the present invention relates to the pressure die-casting of metals, in particular light metals or white metals, such as for example aluminium, magnesium or other metals and their alloys, and more particularly refers to a process and an apparatus for the pressure die-casting of metal-alloy wheels or pressure-cast pieces in general, by means of which injection of the molten metal into the cavity of a die may be performed under controlled temperature, pressure and speed conditions in order to produce high-quality pressure-cast pieces.
  • metals in particular light metals or white metals, such as for example aluminium, magnesium or other metals and their alloys
  • the low pressure technique nevertheless involves an extremely long operating cycle and low productivity.
  • the low pressure requires that the die be formed with metal flow channels and passages having a large cross-sectional area in order to ensure that the metal in the molten state, when it comes into contact with the cold walls of the die, does not solidify rapidly, blocking said passages and channels totally or partially and preventing total filling of the die cavity.
  • the surface finish of a piece produced at low pressure is of a fairly poor quality and, in the case of alloy wheels, requires additional finishing operations at the point where the material is fed into the die.
  • the pieces obtained by means of low pressure have a low mechanical isotropy such that they must undergo additional heat treatment which is particulary delicate in that they must reach temperatures in the region of or substantially close to the melting point of the metal.
  • the molten metal is fed horizontally into the cavity of the die, exerting a very high pressure, equal to or greater than 500-800 Atm (49 - 78,4 MPa), and with high speeds, ranging between 40 and 120 m/s, obtaining cast pieces with a high surface finish, in extremely fast cycle-times.
  • a very high pressure equal to or greater than 500-800 Atm (49 - 78,4 MPa)
  • high speeds ranging between 40 and 120 m/s
  • the patent US-A-4,583,579 proposes monitoring the expansions of the chamber and the plunger of the injection device in order to calculate the instant when the plunger is to be retracted, depending on the temperatures measured following each injection; this patent also refers generally to the use of means for cooling the plunger and a part of the injection chamber in an entirely uncontrolled manner.
  • This document does not deal with and therefore does not propose any useful solution to the basic problem of pressure die-casting, which consists in obtaining conditions for the injection of molten metal which are controlled and suitable for the production of pressure-cast pieces with optimum mechanical properties and surface finish.
  • the patent DE-A-1,156,205 which defines the technological background closest to that of the present invention, as defined in the pre-characterizing part of Claim 1, illustrates a vertical pressure die-casting machine of the "closed" chamber type in which the injection device is directly connected, via a duct, to a furnace supplying the molten metal and in which the injection device comprises a vertical injection chamber and a plunger movable inside said chamber, between a retracted position, where it uncovers a lateral feed opening for the molten metal, and an advanced position where the molten metal is injected into the cavity of a die.
  • this document also does not deal with and solve the basic problem of control of the pressure die-casting process for the production of high-quality metal pieces.
  • the object of the invention is to provide a process and an apparatus for the vertical pressure die-casting of metal parts by means of which it is possible to operate at relatively high pressures, compared to low-pressure die-casting, which are nevertheless considerably lower than those normally used for the production of pieces cast using high-pressure techniques, ensuring at the same time fast production cycles and the realization of cast pieces with a high surface quality and good mechanical properties, which cannot be obtained using other known technologies.
  • a further object of the present invention is to provide a process and an apparatus, as defined above, by means of which it is possible to reduce the phenomenon of air inclusion and the formation of oxides in the molten metal, both during feeding of the metal into the injection device and during injection into the die, obtaining cast pieces with a high degree of mechanical isotropy, as a result of which, in certain cases, it is possible to reduce substantially the resistant cross-sectional areas and hence the flow passages for the metals inside the die, achieving in this way cast pieces which are structurally strong, have thin walls and a comparatively very low weight, in extremely short operating cycles; for example, in the case of alloy wheels it is possible to reduce the weight and the production cycle about 3 or 4 times, compared to a wheel normally produced under low pressure, obtaining wheels with high mechanical and crystallographic properties of the alloy used, as well as a superior finish.
  • Yet another object of the invention is to provide an apparatus for the production of alloy wheels according to the process mentioned above, substantially devoid of deformation phenomena affecting the parts intended to come into contact with the high-temperature molten metal, thus ensuring an operational and processing efficiency and reliability which cannot be achieved with the other known techniques.
  • a further object of the invention is to provide an apparatus for pressure die-casting which uses in combination an injection device and a die particularly suitable for implementation of a medium-pressure die-casting process, according to the invention, as well as the production of wheels of a different type, without having to change the entire production die; for the purposes of the present invention "medium pressure” is understood as meaning a pressure for the injection of molten metal into the die ranging between 50 and 350 Atm (4,9 - 34,3 MPa).
  • the present invention relates to a process for the production of pressure-cast metal pieces , according to which a metered quantity of molten metal is fed into an injection device comprising a sleeve defining a vertical injection chamber and a plunger movable inside said chamber between a retracted position, where it uncovers a lateral opening for entry of the molten metal, and an advanced position, where the molten metal is injected into the cavity of a die assembly, characterized by:
  • the apparatus comprises a base 10 fixed to the floor opposite a pit 11, from which there emerge four side columns 12 held at the top by cross-beams 35.
  • a first movable platen 13 supporting the lower part 14 of a die and an upper platen 15 supporting the upper part 16 of the die are movable between a position close to one another, where the die is closed, and a position far from one another, where the die is open, so as to allow respectively the injection of molten metal into the die and the removal of the cast piece, in the manner illustrated below.
  • the apparatus comprises, moreover, a device 19 for injecting molten metal, contained in a furnace having a pressurised pot 20, provided movably on one side of the apparatus itself.
  • the device 19 for injecting molten metal comprises a cylindrical sleeve 21 defining an injection chamber arranged vertically and centrally with respect to the base 10. Inside the sleeve 21 there slides a plunger 22 connected via a long rod 23 to a hydraulic cylinder 23'.
  • the bottom part 21A of the sleeve 21, on one side thereof, has a radial inlet connector 24, downwardly slanted, which may be connected to the duct 25 of the furnace 20, as described further below with reference to Figures 4 and 5 of the accompanying drawings.
  • the apparatus according to Figures 1 and 2 on the side opposite to the furnace 20, comprises a service table 26 which may be used both for unloading the cast pieces and for replacing the die.
  • the table 26 is slidably supported on a frame 27 and is operated so as to move forwards or backwards by means of a cylinder 28; the support frame 27, in turn, slides along horizontal guides 29, as schematically shown.
  • FIG. 1 denotes a tiltable chute for unloading the deadhead 31 which is conveyed away by means of a conveyor 32; the deadhead 31 is removed from the plunger 22 of the injection device, by a lateral pusher 46.
  • the reference number 33 denotes a locking member for the upper platen 15, positioned on one side of the cross-members 35 for locking the upper platen 15 in the closed condition of the die during the metal injection phase.
  • the furnace 20 containing the molten metal is of the pot type, i.e. designed to contain a given quantity 36 of a molten metal alloy which is constantly maintained at the melting temperature by means of a suitable heating system, not shown.
  • the furnace 20 is of the pressurised type; the air under pressure is fed inside the furnace by a duct 37 connected to a pressurised-air source 38 by a filter 39, a solenoid valve 40 and a pressure regulator 41.
  • FIG. 1 denotes a probe which penetrates inside the furnace so as to provide a signal indicating the height of the molten metal bath 36 and, consequently, an indication of the quantity of metal fed into the injection sleeve 21.
  • the furnace 20 is supported in a movable manner, for example by means of a system of articulated bars 43 provided on a carriage 44 equipped with wheels sliding on rails; the furnace may be operated so as to be raised and lowered by means of a jack 45 or move on the rails by means of a hydraulic cylinder 45A.
  • the movement of raising and/or sliding of the furnace 20 is used to separate the duct 25 supplying the molten metal from the inlet connector 24 of the injection device 19, so as to allow cleaning or prevent the latter from heating excessively, causing dangerous uncontrolled expansion of the injection sleeve 21 with respect to the thrusting plunger 22.
  • FIG. 47 in Figure 1 indicates, in the form of a solenoid valve symbol, the system for connecting the cylinder 23' to a pressurised-oil source 48.
  • the solenoid valves 40, 47, the probe 42 and suitable devices for controlling pressurisation of the furnace 20 and the temperature of the sleeve 21 and the injection plunger 22, as explained below, are appropriately connected, by means of suitable interface circuits, to a programmable control unit 49 having a microprocessor which governs the entire production cycle.
  • a first embodiment of the device 19 for injecting molten metal is shown in the enlarged detail of Figure 3; the device 19 comprises a cylindrical sleeve 21 which is suitably temperature-regulated by circulation of a diathermal fluid inside an insulating jacket 51 surrounding the sleeve itself.
  • the sleeve 21 has two independent temperature-regulation zones, i.e.
  • a first zone close to or in the region of the shaping die is heated and/or cooled by circulating a heating and/or cooling fluid along a first helical channel 50
  • the second temperature-regulated zone located in the region of the lateral inlet opening for the molten metal, is heated and/or cooled by circulation of a heating and/or cooling fluid along a second helical channel 50A.
  • the sleeve 21 terminates at the top in a large annular flange 52, intended to come into contact with the die, which may in turn be heated and/or cooled by heat conduction or in another manner.
  • the flange 52 forms a cavity 53 which opens out towards the chamber 54 of the sleeve 21, which cavity, as shown in Figure 6, is suitably shaped with a conical or diverging side wall, so as to adapt itself to a corresponding part 70 of the die, with which it defines ducts 74 for distribution of the molten metal which must be fed into the cavity of the die.
  • the bottom part 21A of the injection sleeve and its inlet connector 24 may also be temperature-regulated in the same way as the top part of the sleeve 21.
  • the temperatures, and consequently the expansion of the two parts of the sleeve 21, are detected by suitable heat sensors indicated schematically by 55 for the first upper zone 50, 50B of the injection sleeve 21 and by 55A for the lower part 21A.
  • the temperatures and the expansion of the plunger 22 are detected and controlled by a heat sensor 56 which penetrates into the body towards the tip of the plunger itself.
  • the present invention in order to obtain pressure-cast pieces with optimum mechanical properties and a good surface finish, it is advisable to inject the molten metal into the die, under moderately high pressures and under laminar-flow conditions and temperature controlled conditions. Therefore, in addition to temperature-regulation of the injection sleeve 21, from tests and experiments carried out, it has been found that, in addition to temperature-regulation of the injection sleeve it is necessary to perform adequate cooling of the injection plunger, so that the surfaces intended to come into contact with the molten metal of the plunger 22 and that part of the sleeve 21 which delimits the injection chamber close to the die, at the moment of injection, have a temperature difference Dt of predetermined value, i.e. such as to ensure correct axial alignment between plunger 22 and injection sleeve 21 and adequate tolerances as regards the gap between the said plunger and the internal wall of the injection chamber.
  • the plunger 22 is continuously cooled by the circulation of water or other suitable fluid supplied by a separate cooling circuit.
  • the plunger 22 has an internal cavity 57 inside which water or other cooling fluid supplied by a central duct 58 which extends longitudinally inside the hollow rod 23, coaxially with a duct 59 for recirculation of the cooling fluid, is continuously made to circulate.
  • the rod 23 of the plunger is provided moreover with a pneumatic cleaning system for cleaning the molten-metal inlet connector 24, this being performed by means of a strong jet of compressed air.
  • the connector 24 for introducing the molten metal into the injection chamber 54 is arranged on one side of the injection sleeve 21, in the vicinity of the bottom, and is suitably downwardly slanted condition.
  • the rod 23 of the plunger 22 on the same side as the inlet 24, in a position underneath the plunger 22, has a blowing nozzle 60 which can be connected to a compressed-air source at 60A under the control of a logic processing unit 49; as explained further below, at the end of the forward movement of the plunger 22, when the nozzle 60 is aligned with the inlet connector 24, it is possible to generate a strong jet of air which cleans the connector 24, ejecting the molten metal residue adhering to its walls.
  • Figures 4 and 5 show the system for connecting the duct 25 of the furnace to the connector 24 for introducing the molten metal into the injection chamber 54.
  • the duct 25 comprises a tubular element 63 which extends inside the furnace 20 nearly as far as the bottom; the tube 63 is surrounded by a collar 61 made of ceramic or other heat-insulating material designed to withstand high temperatures and is kept constantly heated at the metal melting temperature by means of a heating means 64.
  • the duct 25 terminates in a semi-spherical nozzle 65 which sealingly fits into a corresponding semi-spherical seat at the front end of the inlet connector 24.
  • Reference 66 denotes moreover locking members for locking the duct 25 to the connector 24, which act against a flange 67 at the front end of the connector itself.
  • the locking members 66 are connected to respective actuators 68 so as to be moved towards and away from the flange 67 or to rotate through 90°, as schematically shown in Figure 5, so as to allow engagement and disengagement of the supply duct 25 with respect to the inlet connector 24.
  • a rotating closing member 69 serves to close the duct 25 and/or prevent depressurisation of the furnace when it is separated from the injection device 19.
  • the apparatus operating in accordance with the present invention has proved to be suitable for the production of pressure-cast pieces both of small and large dimensions, obtaining metal castings of 20 or 30 kilograms which in some cases have reached and exceeded 40 kg, with molten-metal contact times of the order of several minutes, at temperatures equal to or slightly less than those for melting of the metal.
  • the cylindrical sleeve 21 is made removable from the external jacket 51 and has two different temperature-regulation zones, defined by the ducts 50, 50A for circulation of the heating and/or cooling fluid, formed directly in the wall of the sleeve. Furthermore, the duct 50 for temperature-regulation of the first zone of the sleeve 21 close to the die continues into a duct 50B which extends peripherally in the flange 52 intended to come into direct contact with the said die; in Figure 6 the same reference numbers have been used to indicate parts similar or equivalent to those of Figure 3.
  • the plunger 22 has a removable head 90 of comparatively limited thickness so as to improve the exchange of heat between the external surface of the head 90 intended to come into contact with the molten metal in the injection chamber 54, and the cooling fluid which is made to circulate inside the internal chamber 57 of the plunger 22.
  • the head 90 is fixed removably to the body 22 of the plunger and correspondingly the body of the plunger 22 is fixed removably to the rod 23 by means of a set of locking screws 91 and 92.
  • Reliable and efficient regulation of the temperature of the plunger may be obtained by providing a cylindrical core 93 inside the chamber 57, provided peripherally with helical fins 94 defining a continuous channel for circulation of the fluid, which is connected to a spiral channel 95 formed between the contact surfaces of the core 93 and the head 90 of the injection plunger.
  • the central duct 58 supplying the fluid extends through the internal core 93, emerging centrally inside the spiral duct 95, while the discharge hole 59 opens out inside the chamber 57 in a position underneath the core 93 and at the point where the helical duct defined by the peripheral fins 94 emerges; in this way the cooling fluid is initially brought into contact with the head 90, cooling it rapidly, and subsequently cools the cylindrical body of the said plunger which thus retains a cylindrical configuration, like the injection chamber 54.
  • the die assembly comprises a bottom die part 14 removably fixed to the lower movable surface 13 of the apparatus, and a top die part 16 removably fixed to the upper movable surface 15, as shown.
  • the bottom die part 14 consists of a bottom die 70 removably fixed, for example by means of bolts (not shown) to a bottom die-carrier 71 supported by the lower movable surface 13 of the apparatus.
  • the bottom die 70 of the die assembly is provided with a peripheral casting ring 72 formed with a circular seat open downwards, into which the circular flange 52 of the sleeve 21 fits.
  • injection channels 74 which, on one side, open into the cavity 75 of the die assembly defined by the bottom die 70 and by the top die 76, while, on the other side, they open downwards and towards a metal distribution chamber defined by the cavity 53 at the top end of the injection sleeve, between the opposing and similarly shaped surfaces of the aforementioned cavity 53 and the bottom die 70.
  • the top die part 16 comprises the top die 76 removably fixed, for example by means of bolts or other disengageable connecting means (not shown), to an upper die-holder 77 connected via spacers 78 to a base plate 79 which in turn is removably fixed to the upper movable surface 15.
  • the top die part further comprises a series of movable side-blocks 80 which are arranged circumferentially around the top die so as to define together with the latter the shaped neck of the wheel onto which a normal tyre is sealingly fitted.
  • the side-blocks 80 can be opened radially so as to allow extraction of the wheel 81 when the die assembly is opened; therefore, the side-blocks 80 are connected, via bars 82, to a movable carriage 83 provided between the upper die-holder 77 and the base plate 79.
  • the individual thrusting bars 82 are arranged inclined and diverging downwards, being guided in their sliding travel by respective guide tubes 84.
  • the carriage 83 is connected to the cylinder 18, the rod of which is extended by an extractor 85 suitable guided in a sliding manner through the top die 76 and the respective die-holder 77.
  • the extractor 85 terminates in a shaped head 86 defining the hub of the cast wheel.
  • the die assembly finally, is completed by the appropriate ducts for circulation of a cooling fluid.
  • the first temperature-regulation circuit 50, 50B of the injection sleeve 51 is connected to an oil-type temperature regulator 96 comprising electric heating means 97 for heating the oil, and cooling means 98 which can be actuated independently of one another, with times and temperatures programmed and controlled by means of the central processing unit 49.
  • the diathermic oil cooling means inside the temperature regulator 96 is in the form of a coil for the circulation of a cooling fluid, for example water at 12°C, connected to a cooling fluid source via a solenoid valve 100 controlled by the processing unit 49, and a first cooler 101, with one or more stages, which in turn is air-cooled.
  • a cooling fluid for example water at 12°C
  • the second circuit 50A for temperature regulation of the injection sleeve 51 is connected to an oil-type temperature regulator 102 comprising heating means 103 and cooling means 104 in the form of a coil connected to the fluid source 99, via a solenoid valve 105 and the cooler 101 mentioned above.
  • the cooling water is at the same temperature for both the temperature regulators 96 and 102 it is evident that the oil contained in them can be maintained at different temperatures by operating the respective heating means, or in some other way, automatically under the control of the processing unit 49 by means of which it is possible to program and monitor on a display the values and temperature histograms of the various temperature-regulated zones.
  • the cooling circuit for the plunger 22 is connected to the water source 99 via a solenoid-valve 106 controlled by the processing unit 49, and an air cooler 107.
  • the electronic processing unit 49 comprises memory means which can be programmed with the various operating data and parameters of the machine according to the process of the present invention; in particular it is programmed with the temperatures of the two temperature-regulated zones of the injection sleeve 51, with the cooling temperature of the head of the plunger 22 as well as with the value Dt of the temperature difference between the first temperature-regulated zone 50, 50B of the sleeve 51, in the region of the zone close to or in contact with the pressure-casting die, which values may be read from a special display of the processing unit 49.
  • a linear displacement transducer 108 is connected to an arm 108' fixed to the rod 23 of the piston of the hydraulic cylinder 23'.
  • the displacement S1 detected by the transducer 107 via an interface 109 or in another way is converted into an electrical signal U1 supplied to the inlet of a regulating circuit 110 forming part of the electronic processing unit 49, by means of which it is possible to regulate and convert, via a special calculation algorithm stored in the logic circuit 111 for operation of the machine, the displacement in time of the rod 23 into data indicating the displacement speed of the plunger 22 of the injection device and consequently the maximum injection speed of the molten metal calculated at the point where the ducts supplying and distributing the molten metal into the die cavity have the smaller cross-section.
  • the single-acting cylinder 23' is connected to a pressurised-oil source 48 via a solenoid valve of the proportional type, in turn operationally connected to the logic control circuit 111.
  • the pressure P of the oil supplied to the hydraulic cylinder 23', via an interface 112 is converted into a signal U2 supplied to a second data inlet of the regulating circuit 110 which, via another calculation algorithm of the logic circuit 111, is converted into a pressure signal P corresponding to the value of the specific pressure at which the molten metal is injected into the die.
  • the molten metal 36 inside the furnace 20 is kept at the desired melting temperature by means of the heating system with which the furnace is provided. It is assumed moreover that the die assembly is open with the two surfaces 13 and 15 completely raised in the condition shown in Figure 7 and that the duct 25 supplying the molten metal of the furnace is separated from the inlet connector 24 of the injection chamber. The plunger 22 is moreover lowered in the condition shown in Figure 1.
  • the solenoid valves 100, 105 and the electrical resistances 97 and 103 of the two temperature regulators 99 and 102 are activated so as to bring the diathermic oil to a suitable temperature for preheating of the temperature-regulated zones 50 and 50A, for example to temperatures close to that for melting of the metal, or slightly lower, the values of which have been prestored in the processing unit 49.
  • temperatures are detected by the heat sensors or thermocouples 45 and 55A and communicated to the logic control unit 49 which compares them with the prestored reference temperatures, so as to avoid sudden jumps in temperature and predispose the said sleeve 21 in the required condition of axial alignment with the plunger 22.
  • the plunger 22 is brought to the required temperature which is detected by the heat sensor 21A and communicated to the logic control unit 49 which compares it with the corresponding prestored reference temperature.
  • the furnace 20 has been pressurised to a predetermined pressure value which will be kept constant, so as to allow, at each working cycle, exact metering of the quantity of molten metal which from time to time will be supplied into the injection sleeve 21.
  • the heat sensors 55, 55A and 56 supply the processing unit 49 with the values of the temperatures detected, indicating the degree of expansion of the sleeve 21 and the plunger 22, and as soon as the difference Dt in temperature detected between the plunger 22, in particular that of its head, and the temperature of the injection sleeve part in contact with the die assembly, has reached a predetermined value, equal to a reference value stored in the processing unit 49, the latter supplies a consent signal for commanding the forward movement of the plunger 22 which is moved a short distance upwards until it closes the inlet connector 24, in view of the fact that the necessary conditions of axial alignment between sleeve 21 and plunger 22 have been achieved.
  • the furnace 20 is moved away and its supply duct 25 separated from the connector 24, following disengagement of the locking members 66 which previously had been operated so as to maintain a sealed connection between the semi-spherical nozzle 65 of the duct 25 and the corresponding semi-spherical cavity at the end of the connector 24.
  • the closing member 69 of the furnace duct is brought into the closed condition, after causing the descent of the molten metal left inside the duct 25 into the furnace.
  • the plunger 22 is made to rise again until the air blowing nozzle 60 coincides with the duct of the connector 24, supplying a strong jet of air in order to clean any molten-metal residue from the connector 24 and thus prevent the said connector from becoming accidentally blocked.
  • the movement of the plunger 22 continues upwards, with the sleeve 21 and the plunger 22 always being maintained under temperature controlled conditions, until the distribution chamber 53, into which the injection chamber 54 opens, is completely filled.
  • the position and the speed of displacement of the plunger 22 are detected by the linear transducer 107.
  • the metal material in the molten state is consequently forced to flow along the channels of the bottom die part, supplying the latter at different predetermined injection points, for example along the peripheral edge of the die cavity, at a predetermined pressure, for example ranging between 50 and 350 Atm (4,9 - 34,3 MPa), and at a speed which are controlled by the control system shown in Figure 11.
  • the die assembly When injection of the metal into the die has been completed and after a sufficient amount of time has lapsed to allow consolidation thereof, the die assembly may be raised and opened, as shown in Figure 7, separating then the deadhead 31 which is dislodged from the plunger and made to fall along the inclined channel 30 onto the conveyor 32. At the same time, the die assembly, as it opens, causes the side-blocks to move apart, freeing the cast piece which thus falls onto the table 26 positioned underneath.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP95110065A 1994-07-04 1995-06-28 Procédé et dispositif de moulage par injection Ceased EP0691166A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI941387 1994-07-04
ITMI941387A IT1270059B (it) 1994-07-04 1994-07-04 Procedimento e apparecchiatura per lo stampaggio di pezzi in lega metallica

Publications (1)

Publication Number Publication Date
EP0691166A1 true EP0691166A1 (fr) 1996-01-10

Family

ID=11369211

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110065A Ceased EP0691166A1 (fr) 1994-07-04 1995-06-28 Procédé et dispositif de moulage par injection

Country Status (5)

Country Link
EP (1) EP0691166A1 (fr)
CN (1) CN1127174A (fr)
CA (1) CA2152758A1 (fr)
IT (1) IT1270059B (fr)
TW (1) TW267958B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040129A1 (fr) * 2006-10-06 2008-04-10 Bühler Druckguss AG Procédé de refroidissement de pistons de coulée
US7886807B2 (en) 2007-06-15 2011-02-15 Die Therm Engineering L.L.C. Die casting control method
EP2486994A3 (fr) * 2011-02-09 2012-10-31 United Technologies Corporation Piston de seringue pour système de moulage
CN105517730A (zh) * 2013-09-03 2016-04-20 丰田自动车株式会社 压铸方法以及压铸装置
WO2017097961A1 (fr) * 2015-12-11 2017-06-15 ADM28 s.àr.l. Embout d'injection pour machine de coulée, machine et procédé de coulée faisant usage d'un tel embout
ITUB20159255A1 (it) * 2015-12-28 2017-06-28 Stefano Beretta Apparato di forgiatura liquida e relativo metodo
CN113814373A (zh) * 2021-10-19 2021-12-21 安徽舜富汽车部件科技有限公司 一种压铸件生产用的一体加工设备
CN116618603A (zh) * 2023-07-17 2023-08-22 合肥亚明汽车部件有限公司 一种铝合金压铸输料、定位夹持一体化装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7225854B2 (en) * 2004-03-30 2007-06-05 Mazda Motor Corporation Casting method and casting apparatus
JP4015139B2 (ja) * 2004-06-28 2007-11-28 ファナック株式会社 鍛圧機械のサーボモータ制御装置
JP4688145B2 (ja) * 2005-06-09 2011-05-25 日本碍子株式会社 ダイキャスト装置及びダイキャスト方法
CN102218523A (zh) * 2011-04-21 2011-10-19 华南理工大学 一种挤压铸造压室温度的调节方法及系统
EP3297779B1 (fr) * 2015-05-20 2020-07-15 Alustrategy S.r.l. Améliorations apportées à des équipements pour la fabrication d'articles en alliage léger ou similaire
CN106623839B (zh) * 2015-11-03 2020-01-14 广东科达洁能股份有限公司 铸造成型机
CN105655595B (zh) * 2016-03-14 2019-08-06 上海福万得物资有限公司 一种能快捷滚铸蓄电池铅网片的装置
PL3645192T3 (pl) * 2017-09-11 2023-09-04 Entec-Stracon Gmbh Sposób, forma odlewnicza i urządzenie do produkcji koła pojazdu
CN117428156B (zh) * 2023-12-21 2024-03-15 福建申利卡铝业发展有限公司 一种高效轮毂铸造设备
CN118122991A (zh) * 2024-05-08 2024-06-04 福建远拓电气科技有限公司 一种电控柜机体生产用压铸设备

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489944A (en) 1937-02-03 1938-08-03 Josef Polak Improvements in or relating to pressure casting apparatus
FR902392A (fr) * 1943-04-01 1945-08-29 Mahle Werk Gmbh Moule de coulée pour machines à mouler par injection et par pression
DE1156205B (de) 1959-02-11 1963-10-24 Eckert G M B H Geb Druckgiessmaschine
DE3013226A1 (de) 1980-04-03 1981-10-15 Nippon Light Metal Co. Ltd., Tokyo Verfahren und vorrichtung fuer die kuehlung der spitze eines pressstempels in einer spritzgussmaschine
JPS59215259A (ja) * 1983-05-19 1984-12-05 Ube Ind Ltd 竪型ダイカスト機における射出装置
DE3427475A1 (de) * 1983-07-25 1985-02-14 Nippon Light Metal Co. Ltd., Tokio/Tokyo Spritzgussverfahren
JPS6092060A (ja) * 1983-10-26 1985-05-23 Toshiba Mach Co Ltd ダイカスト機における給湯量の補正方法
DE3505554A1 (de) 1983-08-17 1986-08-21 Ortwin Prof. Dr.-Ing. Hahn Verfahren zur steuerung einer druckgiessmaschine
DE3636936A1 (de) 1986-10-30 1988-05-05 Buehler Ag Geb Druck- oder spritzgiessmaschine
JPH01178359A (ja) 1987-12-29 1989-07-14 Toyota Motor Corp 下部加圧方式の高圧鋳造装置
US4850420A (en) 1985-11-08 1989-07-25 Toshiba Kikai Kabushiki Kaisha Casting apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB489944A (en) 1937-02-03 1938-08-03 Josef Polak Improvements in or relating to pressure casting apparatus
FR902392A (fr) * 1943-04-01 1945-08-29 Mahle Werk Gmbh Moule de coulée pour machines à mouler par injection et par pression
DE1156205B (de) 1959-02-11 1963-10-24 Eckert G M B H Geb Druckgiessmaschine
DE3013226A1 (de) 1980-04-03 1981-10-15 Nippon Light Metal Co. Ltd., Tokyo Verfahren und vorrichtung fuer die kuehlung der spitze eines pressstempels in einer spritzgussmaschine
JPS59215259A (ja) * 1983-05-19 1984-12-05 Ube Ind Ltd 竪型ダイカスト機における射出装置
DE3427475A1 (de) * 1983-07-25 1985-02-14 Nippon Light Metal Co. Ltd., Tokio/Tokyo Spritzgussverfahren
US4583579A (en) 1983-07-25 1986-04-22 Nippon Light Metal Co., Ltd. Method of die casting
DE3505554A1 (de) 1983-08-17 1986-08-21 Ortwin Prof. Dr.-Ing. Hahn Verfahren zur steuerung einer druckgiessmaschine
JPS6092060A (ja) * 1983-10-26 1985-05-23 Toshiba Mach Co Ltd ダイカスト機における給湯量の補正方法
US4850420A (en) 1985-11-08 1989-07-25 Toshiba Kikai Kabushiki Kaisha Casting apparatus
DE3636936A1 (de) 1986-10-30 1988-05-05 Buehler Ag Geb Druck- oder spritzgiessmaschine
JPH01178359A (ja) 1987-12-29 1989-07-14 Toyota Motor Corp 下部加圧方式の高圧鋳造装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 087 (M - 372) 17 April 1985 (1985-04-17) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 235 (M - 415) 21 September 1985 (1985-09-21) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 458 (M - 880) 17 October 1989 (1989-10-17) *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008040129A1 (fr) * 2006-10-06 2008-04-10 Bühler Druckguss AG Procédé de refroidissement de pistons de coulée
US7886807B2 (en) 2007-06-15 2011-02-15 Die Therm Engineering L.L.C. Die casting control method
US7950442B2 (en) 2007-06-15 2011-05-31 Die Therm Engineering Llc Die casting design method and software
EP2486994A3 (fr) * 2011-02-09 2012-10-31 United Technologies Corporation Piston de seringue pour système de moulage
US8356655B2 (en) 2011-02-09 2013-01-22 United Technologies Corporation Shot tube plunger for a die casting system
US8757243B2 (en) 2011-02-09 2014-06-24 United Technologies Corporation Shot tube plunger for a die casting system
CN105517730A (zh) * 2013-09-03 2016-04-20 丰田自动车株式会社 压铸方法以及压铸装置
CN105517730B (zh) * 2013-09-03 2017-06-27 丰田自动车株式会社 压铸方法以及压铸装置
FR3044943A1 (fr) * 2015-12-11 2017-06-16 Adm28 S Ar L Embout d'injection pour machine de coulee, machine et procede de coulee faisant usage d'un tel embout
WO2017097961A1 (fr) * 2015-12-11 2017-06-15 ADM28 s.àr.l. Embout d'injection pour machine de coulée, machine et procédé de coulée faisant usage d'un tel embout
ITUB20159255A1 (it) * 2015-12-28 2017-06-28 Stefano Beretta Apparato di forgiatura liquida e relativo metodo
WO2017115259A1 (fr) * 2015-12-28 2017-07-06 Stefano Beretta Appareil de forgeage liquide et procédé s'y rapportant
CN113814373A (zh) * 2021-10-19 2021-12-21 安徽舜富汽车部件科技有限公司 一种压铸件生产用的一体加工设备
CN113814373B (zh) * 2021-10-19 2023-04-14 芜湖舜富精密压铸科技有限公司 一种压铸件生产用的一体加工设备
CN116618603A (zh) * 2023-07-17 2023-08-22 合肥亚明汽车部件有限公司 一种铝合金压铸输料、定位夹持一体化装置
CN116618603B (zh) * 2023-07-17 2023-09-19 合肥亚明汽车部件有限公司 一种铝合金压铸输料、定位夹持一体化装置

Also Published As

Publication number Publication date
ITMI941387A0 (it) 1994-07-04
CA2152758A1 (fr) 1996-01-05
CN1127174A (zh) 1996-07-24
ITMI941387A1 (it) 1996-01-04
TW267958B (fr) 1996-01-11
IT1270059B (it) 1997-04-28

Similar Documents

Publication Publication Date Title
EP0691166A1 (fr) Procédé et dispositif de moulage par injection
KR101070972B1 (ko) 다이 캐스팅에 의해 금속 부품들을 제조하기 위한 방법 및장치
US6070643A (en) High vacuum die casting
KR101010287B1 (ko) 용융 알루미늄 고압 압출 장치 및 방법
US5125450A (en) Method of and system for controlling flow of molten liquid to cast metal alloys
US3874440A (en) Moulds for producing light alloy and other castings
CN110461502B (zh) 用于有色合金的热室压铸的设备
EP2688699B1 (fr) Réduction de l'ondulation en bout au moyen d'un écoulement d'eau pulsatoire dans la coulée sous pression
US4211270A (en) Method for continuous casting of metallic strands at exceptionally high speeds
KR102510653B1 (ko) 차압 주조 설비의 용탕 공급 장치
US2923040A (en) Casting process and machine
KR102216654B1 (ko) 주조 장치 및 이것을 사용한 주조 물품의 제조 방법
EP0404138A2 (fr) Procédé et appareil pour l'alimentation automatique de métal liquide pour une machine à couler sous pression
US4349145A (en) Method for brazing a surface of an age hardened chrome copper member
JP3842163B2 (ja) ダイカスト鋳造装置及びダイカスト鋳造方法
GB2103132A (en) A method and apparatus for low pressure casting of metals
US4307770A (en) Mold assembly and method for continuous casting of metallic strands at exceptionally high speeds
JP4139868B2 (ja) 高融点金属の高圧鋳造方法およびダイカスト装置
KR100992179B1 (ko) 용탕 단조 장치 및 이를 이용한 용탕 단조 방법
JP3117163B2 (ja) ダイカストマシン
GB2116888A (en) Semicontinuous casting apparatus
JPH05161951A (ja) 金型鋳造装置
CN113319267B (zh) 悬浮熔炼设备配备的挤压铸造装置和悬浮熔炼-挤压铸造的方法
EP0042995B1 (fr) Appareil et procédé pour la coulée continue de fils métalliques à des vitesses exceptionnellement élevées utilisant un moule oscillant
JPH0428467B2 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FR GB IT LI SE

17P Request for examination filed

Effective date: 19960627

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19980618

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19981206