Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22C—FOUNDRY MOULDING
  • B22C9/00—Moulds or cores; Moulding processes
  • B22C9/06—Permanent moulds for shaped castings
  • B22C9/062—Mechanisms for locking or opening moulds
• • 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
  • B22D17/002—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure using movable moulds
• • 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
  • B22D17/26—Mechanisms or devices for locking or opening dies
  • B22D17/263—Mechanisms or devices for locking or opening dies mechanically
• • 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
  • B22D17/26—Mechanisms or devices for locking or opening dies
  • B22D17/266—Mechanisms or devices for locking or opening dies hydraulically

Definitions

• the present invention is also concerned with a die casting process for making such castings from liquid molten metal. It has already created so-called hot chamber die casting machines in which the existing of a die and a Druckg tellkolben G demgarnitur is in the heated metal bath. The die casting machine and the holding furnace required to keep the metal bath warm form one unit. In such hot chamber die casting machines, the liquid metal is sucked out of the metal bath by means of the upwardly moving die casting piston. During the subsequent downward movement of the pressure casting piston, the inlet opening coming from the metal supply is closed and the liquid metal is shot at high pressure and high speed into the mold cavity located in the die.
• the mold parts of the die are moved along guide columns, which are part of the die casting machine, wherein the guide columns and the
• CONFIRMATION COPY Hydraulic cylinders are sized so large that they are able to hold the mold parts together even under high operating pressures of the die. Since the known die casting machines should also be usable in conjunction with larger die casting molds and since the guide columns and hydraulic cylinders are still to withstand the stresses that occur during the process and holding together of the mold parts, the known die casting machines are correspondingly bulky in design and production , elaborate and expensive.
• the die casting machine has a die which has at least one fixed first casting part, at least one second casting part movable along guide columns and at least two casting side parts which are movable relative to each other transversely to the travel path of the at least one second casting part.
• there are locking pins on at least two mold side parts which in the closed position engage behind at least the at least one movable second mold part such that the travel of the second mold part is limited in the direction away from the at least one first mold part.
• the Molded parts and the mold side parts of the die are thus mechanically interconnected so that the die is capable of withstanding high pressures in its closed or locked state.
• the guide columns and the associated units are required only for moving the at least one second mold part relative to the at least first mold part. Since these guide columns and required for the process associated aggregates no longer need to be sized so as to hold the die together even under high operating pressures, the die casting machine according to the invention can be even smaller, more compact and cost-effective dimensioned, even if they are also for the production of larger castings should be usable. With the die casting machine according to the invention, therefore, considerable energy savings can also be achieved.
• the travel of the at least one second mold part is limited in the direction away from the at least one first mold part direction, it is sufficient if the provided on the mold side parts locking pin engage behind at least at least a second mold part, while the at least one first mold part, for example, immovably the machine plate of the die casting machine according to the invention can be anchored.
• the pressures occurring when holding the die together can then be absorbed and transferred evenly between mold parts and mold side parts when the locking pin protruding from the at least two mold side parts comprises the at least one fixed first mold part and the at least one movable second mold part engage behind.
• the at least one movable second mold part is movable at least with a portion in the orm side parts bounded by the casting gap.
• At least one locking pin is movable in the journal longitudinal direction and / or that the at least one locking pin should be movable against a restoring force.
• the restoring force is designed as a return spring and in particular as a compression spring.
• at least one hydraulic, pneumatic or electromechanical force transmitter serves as remindstellkraf.
• the locking pins mechanically connect the mold parts and the mold side parts and can distribute the forces acting on these components of the die well
• the locking pins are integrated into the at least two mold side parts and / or if the locking pin in the closed position an associated abutment engage behind the at least one mold part.
• a structurally particularly simple embodiment according to the invention provides that the at least one locking pin associated abutment is formed as a protruding on a mold part flange.
• the thermally induced dimensional changes of the die can be compensated particularly well when the locking pins are tapered towards their free pin ends such that their adjacent abutment facing side surface a
• Slope forms, and that at least at one
• Molded part provided counter bearing preferably has a complementary casserole counterbore.
• a second mold part has two mold sections, which can be brought apart at a distance. While the upper mold section is connected to the mold side parts via the locking pins engaging its counter bearing, the lower mold section can be spaced such that the volume available as mold cavity is reduced and the pressure on the molten metal in the mold cavity is substantially increased , The volume reduction of the metal occurring during the metal age is compensated by the permanent pressure and can not lead to porosities.
• the mold sections can be brought by means of at least one hydraulic, pneumatic or electro-mechanical force transmitter or any other suitable means at a distance.
• a highly loadable construction according to the invention provides that the mold sections of the at least one second mold part are displaceably guided into each other and preferably spaced apart by pressurization of at least one separating surface located between them.
• the at least one mold side part by means of a side member drive is transverse to the travel of the second mold part movable and if the return movement of the side part drive of the at least one mold side part is mechanically blocked.
• a particularly simple and yet robust embodiment form according to the invention provides that the / the side member drive (s) is designed as a hydraulic cylinder / are.
• the mold parts and the casting mold Side parts define at least one mold cavity, in which mold cavity at least one air suction opening and at least one preferably central inlet opening opens for the molten metal.
• At least one locking slide is displaceably guided in a closed position at least one, preferably central inlet opening tightly closes.
• the molten metal is particularly easy to hold in front of the at least one inlet opening, without unfavorable influences of the ambient air on the molten metal to be feared if the molten metal supply required for subsequent casting operations is preferably present or arranged directly below the diecasting mold.
• the die casting machine has at least one molten metal pump with which the molten metal from a molten metal supply via the at least one Zulauf ⁇ opening in the at least one mold cavity of the die is conveyed.
• the compact design of the die casting machine according to the invention is favored when the guide columns protrude beyond the stationary first mold part or a machine plate of the die casting machine carrying the first mold.
• FIG. 1 shows a partially longitudinally cut die casting machine with a die casting mold which has a first fixed casting part, a second casting part which can be moved along guide columns and casting mold side parts which are movable transversely to the second casting part part, wherein the casting mold parts and casting side parts are in their mechanically locked closing position. or operating position are shown.
• FIG. 3 shows the die casting machine of FIGS. 1 and 2 upon completion of a pressure casting process and immediately before removal of the finished casting
• Fig. 4 a comparable with Figs. 1 to 3
• Fig. 7 the longitudinally cut portion of the already in the
• Fig. 4 to 6 shown die casting in the field of
• FIG. 8 shows the partial region of the die shown in FIG. 4 in the region of the inlet opening, wherein the
• Gate valve here is in a closed position
• Fig. 9 also longitudinally cut and already in the
• FIGS. 1 to 6 show a die casting machine in two embodiments 1, 10.
• the die casting machine 1, 10 is intended for the production of metal castings 2.
• the die casting machine 1, 10 has a die casting mold 3, which encloses at least one molding cavity 4, which predetermines the outline of the casting 2.
• the die casting mold 3 of the die casting machine 1, 10 has at least one fixed first casting part 5, at least one second casting part 7 movable along guide columns 6 and at least two casting mold side parts 8, 9 movable transversely to the travel path of the second casting part 7.
• the fixed first mold part 5 is fixedly mounted on a machine plate 11 of the die casting machine 1, 10.
• the movable second mold part 7 is held on at least one hydraulic cylinder 12, which serves as a travel drive.
• the here vertically oriented hydraulic cylinder 12 is held with its second mold part 7 facing away from the portion at a distance above the machine plate 11 at the free end portions of the guide columns 6. So that the casting mold side parts 8, 9 are movable relative to one another transversely to the travel path of the second casting part 7, all casting side parts 8, 9 are held displaceably on the machine plate 11 by means of at least one hydraulic cylinder 13 serving as a side part drive.
• FIGS. 2 and 4 it can be seen that on at least two mold side parts 8, 9 protrude locking pins 14 which engage behind in the closed position at least the movable second mold part 7 such that the travel of the second molding die 7 in the first mold part 5 opposite direction is limited.
• the embodiments 1, 10 of the die casting machine shown here have locking pins 14 on all their casting side parts 8, 9, which engage behind both the first and the second casting mold parts 5, 7.
• the mold parts 5, 7 and the mold side parts 8, 9 can be mechanically locked in such a way that the pressure casting mold in its closed position also uses high operating pressures of the inside of the pressure casting mold Molten metal can withstand.
• each lateral drive is associated with at least one locking bar 16 which is movable between an open position and a blocking position.
• the locking bars 16 act on a stop face 17 connected to a casting side part 8, 9 in such a way that a return movement of the side part drive is blocked.
• the locking bar 16 taper towards its free end of the bolt out such that their side facing the adjacent mold-side part 8, 9 side surface forms a ramp 18. Since the stop surfaces connected to a casting side part 8, 9 have a complementary run-on counter-slope, thermally induced dimensional deviations during assembly of the die-casting mold 3 can also be well compensated in this area.
• the mold parts 5, 7 and the mold side parts 8, 9 enclose in their closed position at least one mold cavity 4, in which the required for the production of the casting 2 molten metal can be poured.
• the movable second mold part 7 has two mold sections 23, 24 which can be brought apart at a distance from one another.
• the lower mold section 24 While the upper mold section 23 carries the behind engaged by locking pin 14 and serving as an abutment flange 21, the lower mold section 24 in contrast, in the space bounded by the mold side parts 8, 9 intermediate space.
• the mold sections 23, 24 have slidably into each other guided portions, which can be brought here by pressurizing the separating surfaces lying between them at a distance.
• the mold parts 5, 7 and the mold side parts 8, 9 define in the closed position of the die 3 at least one Mold cavity 4.
• at least one air exhaust opening 25 and at least one inlet opening 26 opens into each mold cavity.
• the air enclosed in the mold cavity 4 can be sucked off via the air exhaust opening 25 the molten metal is poured or fed in via the at least one inlet opening 26.
• at least one locking slide 27 is displaceably guided, the at least one inlet opening 26 closes tightly in the closed position, such that the molten metal reservoir 28 can still be present immediately behind the locking slide 27. It can be seen in FIGS.
• the die casting machine 1 shown here is characterized by a much more compact design. Since the hydraulic cylinder 12 is needed only for moving the second mold part 7 and the mold parts 5, 7 does not hold together, this hydraulic cylinder 12 and the second mold part 7 supporting guide columns 6 can be designed correspondingly smaller. Since thus lower forces required to operate the die casting machine shown here are, can be achieved with the die casting machine 1, a significant energy savings.
• FIGS. 7 to 9 show the die casting mold 3 of the die casting machine 10 in a detail view in the region of the inlet opening 26, it becomes clear that the closure slide 27 after filling the at least one mold cavity 4 provided in the die casting mold 3 from its 8, in which closed position the metal melt located in the at least one mold cavity 4 is separated from the molten metal reservoir 28 required for subsequent casting operations and the inlet opening 26 is sealed.
• the casting mold sections 23, 24 are hydraulically spaced and the metal melt in the at least one mold cavity is pressurized, so that the locking slide 27 additionally enters the inlet opening 28 assigned to it (see FIG ). But it is also possible to bring the mold sections 23, 24 pneumatically, electro-mechanically or in any other suitable manner at a distance.
• the die casting mold 3 of the die casting machine 10 can also have a plurality of mold cavities 4 for simultaneously producing a plurality of castings 2. While the die casting machine 1 according to FIGS. 1 to 4 has a die 3 with only one mold cavity 4, in which cavity 4, for example, a light metal impeller can be produced, a plurality of mold cavities 4 are provided in the die casting mold 3 of the die casting machine 10 according to FIG , which are used here for the simultaneous production of, for example, several pistons. LIST OF REFERENCE NUMBERS

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Molds, Cores, And Manufacturing Methods Thereof (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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ID=46650489

Family Applications (1)

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Citations (9)

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• 2011
  • 2011-08-12 DE DE102011110176A patent/DE102011110176B4/de not_active Expired - Fee Related
• 2012
  • 2012-08-06 US US14/238,582 patent/US20140190652A1/en not_active Abandoned
  • 2012-08-06 WO PCT/EP2012/003355 patent/WO2013023754A1/de active Application Filing
  • 2012-08-06 MX MX2014001437A patent/MX2014001437A/es unknown
  • 2012-08-06 CN CN201280039355.0A patent/CN103747895A/zh active Pending
  • 2012-08-06 JP JP2014524300A patent/JP2014521519A/ja active Pending
  • 2012-08-06 EP EP12746028.5A patent/EP2741875B1/de active Active

Patent Citations (9)

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