CN216325030U - Mold casting device - Google Patents

Abstract

The utility model discloses a die casting device, which comprises an air box, a sealing tank, a rapid cooling structure and a plunger rod piece, wherein the air box is communicated with the sealing tank through an air pressure pipe, the upper end of the sealing tank is provided with a lower die, the upper end of the lower die is provided with an upper die, the lower end surface of the upper die is provided with a die cavity, the lower end surface of the lower die is provided with a riser tube, the lower port of the riser tube is arranged at the bottom of the cavity of the sealing tank, the upper port of the riser tube is communicated with a pouring gate arranged in the lower die, the pouring gate is communicated with an annular pouring gate arranged on the upper end surface of the lower die, and the annular pouring gate is matched with the die cavity and communicated with each other; this casting device adopts top-down solidification process, can realize the foundry goods and pressurize the feeding in solidification process, improves casting quality, and the design of annular runner simultaneously can guarantee that the foundry goods is in the even ring process of a atress all the time at solidification process, and the shape and size is even, and in addition the use of plunger member can prevent that the oxide from following the stalk and getting into the die cavity, avoids the foundry goods quality to receive the influence.

Description

Mold casting device

Technical Field

The utility model relates to a casting device, in particular to a die casting device.

Background

At present, the casting process of the aluminum alloy patterned ring is generally used for low-pressure casting and gravity casting. The low-pressure casting has the advantages of high casting density and good strength, but the tire mold is complicated in process requirement, difficult to grasp in determination of equipment and technical parameters due to large volume of the pattern ring of the tire mold and various changes of the shape and the size of a product, and has great influence on the qualified rate of finished products.

The publication No. CN201010523985.8 discloses a low-pressure casting device and a low-pressure casting and gravity feeding process for an aluminum alloy pattern ring of a tire mold; the casting equipment comprises a crucible and a riser tube; a disc-type pouring gate base plate is arranged on the crucible, and the lower end of the riser tube penetrates through a center hole of the pouring gate base plate and extends into the crucible; a casting mold substrate is hermetically covered on the pouring gate substrate, a casting mold outer mold is arranged on the casting mold substrate, a dead head is arranged at the upper end of the casting mold outer mold, and a pouring gate is arranged in the inner cavity of the casting mold; the upper port of the riser tube passes through the pouring gate substrate and the casting mold substrate to be communicated with the pouring gate; the inner cavity of the casting mold outer mold at the periphery of the pouring gate is provided with a stepped air chamber surrounding the pouring gate, and the stepped air chamber is provided with an air inlet nozzle and an air outlet nozzle.

This pouring equipment is when casting, because aluminium liquid solidification order from bottom to top, the lower part has the inlet, for circumferencial direction non-uniform distribution, and the solidification process exists the atress inhomogeneous, influences the casting and solidifies shape effect, and in addition, when pouring into aluminium liquid into the crucible, oxide and the attachment that aluminium liquid surface produced can sink under the liquid level, when pressurizeing the crucible, these impurity can follow aluminium liquid and get into to water in, solidify in the metal work piece, influence the quality of foundry goods. In this regard, improvements are needed.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a mold casting apparatus to solve the above problems of the related art.

In order to achieve the purpose, the utility model provides the following technical scheme:

a mold casting device comprises an air box and a sealing tank arranged on one side of the air box, wherein the air box is communicated with the sealing tank through an air pressure pipe fitting, a lower mold is arranged at the upper end of the sealing tank, and an upper mold is arranged at the upper end of the lower mold;

the lower end surface of the upper die is provided with a die cavity, the upper end surface of the upper die is provided with an inner slotted hole and a riser, the inner slotted hole is formed in the center of the upper die, and the riser surrounds the outer part of the inner slotted hole and is communicated with the die cavity;

the lower end surface of the lower die is provided with a liquid lifting pipe, the lower port of the liquid lifting pipe is arranged at the bottom of the cavity of the sealed tank, the upper port of the liquid lifting pipe is communicated with a pouring gate arranged in the lower die, the pouring gate is communicated with an annular pouring gate arranged on the upper end surface of the lower die, and the annular pouring gate is matched with the die cavity and is communicated with the die cavity;

the rapid cooling structure is arranged in the upper die, is communicated with the bellows through a pipe fitting and is used for performing staged cooling on the aluminum liquid in the die cavity;

and the plunger rod piece penetrates through the upper die and the lower die, extends into the liquid lifting pipe and is matched with the pneumatic clamp arranged in the inner groove hole in an assembling way, and the plunger rod piece is movably matched with the liquid lifting pipe.

Preferably, the upper end surface of the upper die is provided with at least two risers, and the lower ports of the risers are communicated with the top of the die cavity.

Preferably, the atmospheric pressure pipe fitting includes negative pressure pipe and pressurized tube, negative pressure pipe one end and seal pot inner chamber intercommunication, the negative pressure pipe other end with establish the negative-pressure air blower output intercommunication in bellows, the junction of negative pressure pipe and seal pot is equipped with sealing valve, pressurized tube one end and seal pot intercommunication, the pressurized tube other end with establish the booster pump output intercommunication in bellows.

Preferably, the sealed tank is kept away from bellows one side and is equipped with notes liquid pipe, notes liquid pipe one end with establish the notes liquid of sealed tank inner wall and water the board intercommunication, annotate the liquid pipe other end and be equipped with sealing valve.

Preferably, the rapid cooling structure comprises an air cooling groove formed in the upper die, the air cooling groove comprises a first annular cavity, a second annular cavity and a third annular cavity corresponding to the upper half part, the middle part and the lower half part of the die cavity, the upper end of the first annular cavity is communicated with the output end of a fan in the air bellow through an air cooling pipe, and the other end of the second annular cavity is sequentially communicated with the second annular cavity and the third annular cavity.

Preferably, the plunger rod piece comprises a guide rod, the guide rod penetrates through a second perforation formed in the center of the upper die and a first perforation formed in the center of the lower die and is in sliding fit with the second perforation and the first perforation, the bottom end of the guide rod is fixedly connected with a counterweight sliding block arranged at the intersection of the riser and the pouring gate, and the counterweight sliding block is in sliding fit with the inner wall of the riser.

Preferably, the pneumatic clamp device comprises a connecting shell, the connecting shell is fixed on the bottom wall of the inner groove hole and corresponds to the first through hole, the center of the connecting shell is provided with an annular groove hole, two movable blocks which are symmetrically arranged are arranged in the annular groove hole, the two movable blocks are arranged on two sides of the guide rod and connected with the output end of a movable column arranged in the connecting shell, the movable column is communicated with the output end of an air pump arranged in the air box through an air guide pipe, and an arc-shaped groove matched with the guide rod is formed in one side, close to the guide rod, of the two movable blocks.

Preferably, a retainer ring is arranged at the edge of the upper end face of the lower die, and the retainer ring is sleeved outside the lower end of the upper die and matched with the upper die.

Preferably, the outer wall of the annular pouring channel in the lower die is provided with a heat insulation layer.

Compared with the prior art, the utility model has the beneficial effects that:

the casting device adopts a top-down solidification process, so that pressurized feeding of a casting in the solidification process can be realized, and the casting quality is improved;

the design of the annular pouring channel on the casting device can ensure that the casting is always in an annular process with uniform stress in the solidification process, and the shape and the size are uniform;

the casting device cools the molten aluminum in the mold cavity in a staged manner from top to bottom through the rapid cooling structure, so that the casting efficiency of castings can be effectively improved;

the use of the plunger rod piece on the casting device can ensure the cleanness of the liquid lifting pipe, can prevent oxides from entering a die cavity along with the liquid lifting pipe, and avoids the quality of castings from being influenced.

Drawings

Fig. 1 is a schematic structural view of a mold casting apparatus.

Fig. 2 is a schematic structural view of a lower die in a die casting apparatus.

Fig. 3 is a schematic structural view of an upper mold in a mold casting apparatus.

Fig. 4 is a schematic view of a cavity in a die casting apparatus.

Fig. 5 is an enlarged view of a structure of a mold casting apparatus at a in fig. 1.

Fig. 6 is a schematic structural view of a connecting housing in a die casting apparatus.

In the figure: 1. an air box; 2. sealing the tank; 3. an upper die; 4. a negative pressure tube; 5. a pressurizing pipe; 6. liquid injection pouring plate; 7. a liquid injection pipe; 8. a riser tube; 9. a lower die; 10. a pouring channel; 11. a first perforation; 12. a retainer ring; 13. an annular runner; 14. a heat-insulating layer; 15. an inner slot; 16. a riser; 17. an air-cooled pipe; 18. a gas conduit; 19. a mold cavity; 20. an air cooling groove; 21. a second perforation; 22. connecting the shell; 23. a guide bar; 24. a counterweight sliding block; 25. an annular slot; 26. a movable block; 27. a movable post; 28. an arc-shaped groove.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 6, in an embodiment of the present invention, a mold casting apparatus includes an air box 1 and a seal can 2 disposed on one side of the air box 1, the air box 1 is communicated with the seal can 2 through an air pressure pipe, a lower mold 9 is disposed at an upper end of the seal can 2, and an upper mold 3 is disposed at an upper end of the lower mold 9; the lower end surface of the upper die 3 is provided with a die cavity 19, and the upper end surface of the upper die 3 is provided with an inner slotted hole 15 and a riser 16. The upper end surface of the upper die 3 is provided with at least two risers 16, an inner slot hole 15 is formed in the center of the upper die 3, the risers 16 surround the outer part of the inner slot hole 15 and are communicated with a die cavity 19, and the quick cooling structure and the plunger rod piece are further included; the aluminum liquid enters the die cavity 19 through the pouring gate 10 and the annular pouring gate 13, and the gas in the die cavity 19 is discharged from the riser 16;

a liquid lifting pipe 8 is arranged on the lower end face of the lower die 9, the lower port of the liquid lifting pipe 8 is arranged at the bottom of a cavity of the sealed tank 2, the upper port of the liquid lifting pipe 8 is communicated with a pouring gate 10 arranged in the lower die 9, the pouring gate 10 is communicated with an annular pouring gate 13 arranged on the upper end face of the lower die 9, and the annular pouring gate 13 is matched with the die cavity 19 and is communicated with the die cavity; aluminium liquid flows into and waters 10 in through riser pipe 8, then flows to annular and waters 13 in, annular is watered 13 and is a ring, enables the aluminium liquid evenly distributed of pouring into in the die cavity 19, and when 19 aluminium liquid in die cavity was filled, the foundry goods can be in a stress uniform ring process all the time at the solidification in-process, and the effort offsets each other to make the shape and size keep evenly.

The air pressure pipe fitting comprises a negative pressure pipe 4 and a pressure pipe 5, one end of the negative pressure pipe 4 is communicated with the inner cavity of the seal pot 2, the other end of the negative pressure pipe 4 is communicated with the output end of a negative pressure fan arranged in the air box 1, a seal valve is arranged at the joint of the negative pressure pipe 4 and the seal pot 2, one end of the pressure pipe 5 is communicated with the seal pot 2, and the other end of the pressure pipe 5 is communicated with the output end of a pressure pump arranged in the air box 1; the sealing valves on the negative pressure pipe 4 and the liquid injection pipe 7 are closed, the booster pump is started, the inner cavity of the sealed tank 2 is pressurized through the pressurization pipe 5, the aluminum liquid is pushed by air pressure to be injected into the liquid rising pipe 8, then the aluminum liquid is conveyed into the pouring gate 10 and the annular pouring gate 13 from the liquid rising pipe 8, finally the aluminum liquid is injected into the mold cavity 19 from the annular pouring gate 13, the aluminum liquid at the riser 16 is solidified and continuously pressurized, a casting is fed until the aluminum liquid in the mold cavity 19 is solidified, the pressurization is stopped, and the unsolidified aluminum liquid flows back.

A liquid injection pipe 7 is arranged on one side of the sealed tank 2, which is far away from the air box 1, one end of the liquid injection pipe 7 is communicated with a liquid injection pouring plate 6 arranged on the inner wall of the sealed tank 2, and the other end of the liquid injection pipe 7 is provided with a sealing valve; before adding into aluminium liquid, through negative pressure pipe 4 and 5 replacement air in the sealed tank 2 of pressurized tube, pneumatic clamp dress removes the fixed to the plunger member, the plunger member falls from last mould 3, when 8 inner walls of stalk are clean, move to 8 lower port departments of stalk and stop, advance the shutoff to stalk 8, the valve on the liquid pipe 7 will be annotated this moment and open, aluminium liquid pours into in board 6 pours into sealed tank 2 through annotating the liquid, at this moment, the oxidation clamp sediment that produces on the liquid level just can not be when the casting, through getting into in the stalk 8 in the flow die cavity 19, reduce foundry goods shaping quality.

The rapid cooling structure is arranged in the upper die 3, is communicated with the air box 1 through a pipe fitting and is used for performing stage-type cooling on the aluminum liquid in the die cavity 19; the quick cooling structure comprises an air cooling groove 20 arranged in the upper die 3, the air cooling groove 20 comprises a first annular cavity, a second annular cavity and a third annular cavity corresponding to the upper half part, the middle part and the lower half part of the die cavity 19, the upper end of the first annular cavity is communicated with the output end of a fan in the air bellow 1 through an air cooling pipe 17, and the other end of the second annular cavity is sequentially communicated with the second annular cavity and the third annular cavity. The upper port of the first annular cavity is communicated with the output end of the fan in the air box 1 through the air cooling pipe 17, the lower port of the first annular cavity is communicated with the upper port of the third annular cavity through the second annular cavity, and the lower port of the third annular cavity is communicated with the input end of the fan in the air box 1 through another pipe fitting. When the fan is started, airflow can enter the first annular cavity and then enter the second annular cavity and the third annular cavity in one step, the number of the second annular cavities is larger than that of the first annular cavity, the number of the third annular cavities is larger than that of the second annular cavities, and castings in the mold cavity 19 can be sequentially cooled. Because the low-pressure casting is from bottom to top filled, the pouring gate is at the lower part, in order to make the casting be sufficiently compensated, the sequential solidification from top to bottom is required to be formed, one end far away from the annular pouring gate 13 is solidified firstly, and the end close to the pouring gate is solidified finally, so that the defects of shrinkage cavity and shrinkage porosity of the casting after molding are avoided.

The plunger rod piece penetrates through the upper die 3 and the lower die 9, extends into the liquid lifting pipe 8 and is matched with the pneumatic clamp arranged in the inner groove hole 15 in a mounting way, and the plunger rod piece is movably matched with the liquid lifting pipe 8; the plunger rod piece comprises a guide rod 23, the guide rod 23 penetrates through a second perforation 21 formed in the center of the upper die 3 and a first perforation 11 formed in the center of the lower die 9 and is in sliding fit with the second perforation 21 and the first perforation 11, the bottom end of the guide rod 23 is fixedly connected with a counterweight sliding block 24 arranged at the intersection of the riser 8 and the pouring gate 10, and the counterweight sliding block 24 is in sliding fit with the inner wall of the riser 8.

The pneumatic clamp comprises a connecting shell 22, the connecting shell 22 is fixed on the bottom wall of an inner slotted hole 15 and corresponds to a first through hole 11, an annular slotted hole 25 is formed in the center of the connecting shell 22, two symmetrically-arranged movable blocks 26 are arranged in the annular slotted hole 25, the two movable blocks 26 are arranged on two sides of a guide rod 23 and connected with the output end of a movable column 27 arranged in the connecting shell 22, the movable column 27 is communicated with the output end of an air pump arranged in an air box 1 through an air guide pipe 18, and an arc-shaped groove 28 matched with the guide rod 23 is formed in one side, close to the guide rod 23, of the two movable blocks 26; when replacing the interior air of seal pot 2, the air pump starts, removes the centre gripping state to guide bar 23 through air duct 18 control movable post 27, and counter weight slider 24 drives guide bar 23 and to the whereabouts, and counter weight slider 24 and stalk 8 inner wall sliding fit clear up the stalk 8 inner wall, when removing the port department under the stalk 8, movable post 27 is flexible and fixes guide bar 23 through movable block 26 to seal the port under the stalk 8.

A check ring 12 is arranged at the edge of the upper end surface of the lower die 9, and the check ring 12 is sleeved outside the lower end of the upper die 3 and is matched with the upper die 3. An insulating layer 14 is arranged on the outer wall of the annular pouring channel 13 in the lower die 9. After the aluminum liquid in the die cavity 19 is formed, the pressurizing pipe 5 stops applying pressure to the sealed tank 2, uncooled aluminum liquid can flow back into the sealed tank 2 through the pouring gate 10 and the liquid lifting pipe 8, the heat insulation layer 14 surrounds the outer side of the annular pouring gate 13 and is used for reducing heat loss, when the aluminum liquid in the die cavity 19 is solidified, the aluminum liquid in the annular pouring gate 13 can still be kept in an unsolidified state, and the waste of the aluminum liquid is reduced.

The working principle of the utility model is as follows: air in the sealed tank 2 is replaced by the negative pressure pipe 4 and the pressurization pipe 5, the air pump is started, the movable column 27 is controlled by the air guide pipe 18 to release the clamping state of the guide rod 23, the counterweight slider 24 drives the guide rod 23 to fall downwards, the counterweight slider 24 is in sliding fit with the inner wall of the riser pipe 8 to clean the inner wall of the riser pipe 8, when the movable column 27 moves to the lower port of the riser pipe 8, the movable column 27 stretches and retracts to fix the guide rod 23 through the annular slotted hole 25, the lower port of the riser pipe 8 is sealed, a valve on the liquid injection pipe 7 is opened, aluminum liquid is injected into the sealed tank 2 through the pouring plate 6, the negative pressure pipe 4 and the sealing valve on the liquid injection pipe 7 are closed, the booster pump is started, the inner cavity of the sealed tank 2 is pressurized through the pressurization pipe 5, the aluminum liquid is pushed by air pressure to be injected into the riser pipe 8, then is conveyed into the pouring gate 10 and the annular pouring gate 13 from the riser pipe 8, and finally is added into the mold cavity 19 from the annular pouring gate 13, and (3) discharging gas in the die cavity 19 from the riser 16, continuously pressurizing after the aluminum liquid at the riser 16 is solidified, feeding the casting, stopping pressurizing after the aluminum liquid in the die cavity 19 is solidified, and reflowing uncooled aluminum liquid into the sealed tank 2 through the pouring channel 10 and the riser pipe 8.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.

Claims (9)

1. A mold casting device comprises an air box (1) and a sealing tank (2) arranged on one side of the air box (1), wherein the air box (1) is communicated with the sealing tank (2) through an air pressure pipe fitting, a lower mold (9) is arranged at the upper end of the sealing tank (2), and an upper mold (3) is arranged at the upper end of the lower mold (9);

the quick cooling device is characterized by further comprising a quick cooling structure and a plunger rod piece, wherein a die cavity (19) is formed in the lower end face of the upper die (3), an inner slotted hole (15) and a riser (16) are formed in the upper end face of the upper die (3), the inner slotted hole (15) is formed in the center of the upper die (3), and the riser (16) surrounds the outer portion of the inner slotted hole (15) and is communicated with the die cavity (19);

a liquid lifting pipe (8) is arranged on the lower end face of the lower die (9), the lower port of the liquid lifting pipe (8) is arranged at the bottom of a cavity of the sealed tank (2), the upper port of the liquid lifting pipe (8) is communicated with a pouring gate (10) arranged in the lower die (9), the pouring gate (10) is communicated with an annular pouring gate (13) arranged on the upper end face of the lower die (9), and the annular pouring gate (13) is matched with the die cavity (19) and is communicated with the die cavity;

the rapid cooling structure is arranged in the upper die (3), is communicated with the air box (1) through a pipe fitting and is used for performing stage-type cooling on the aluminum liquid in the die cavity (19);

the plunger rod piece penetrates through the upper die (3) and the lower die (9) to extend into the liquid lifting pipe (8) and is matched with the pneumatic clamp arranged in the inner slotted hole (15) in a mounting mode, and the plunger rod piece is movably matched with the liquid lifting pipe (8).

2. The die casting device according to claim 1, wherein the upper die (3) has at least two risers (16) formed at an upper end surface thereof, and a lower port of each riser (16) is communicated with a top of the die cavity (19).

3. The mold casting device according to claim 1, wherein the air pressure pipe comprises a negative pressure pipe (4) and a pressure pipe (5), one end of the negative pressure pipe (4) is communicated with the inner cavity of the seal pot (2), the other end of the negative pressure pipe (4) is communicated with the output end of the negative pressure fan arranged in the air box (1), a sealing valve is arranged at the joint of the negative pressure pipe (4) and the seal pot (2), one end of the pressure pipe (5) is communicated with the seal pot (2), and the other end of the pressure pipe (5) is communicated with the output end of the booster pump arranged in the air box (1).

4. The die casting device according to claim 1, characterized in that a liquid injection pipe (7) is arranged on the side of the sealed tank (2) far away from the air box (1), one end of the liquid injection pipe (7) is communicated with a liquid injection pouring plate (6) arranged on the inner wall of the sealed tank (2), and the other end of the liquid injection pipe (7) is provided with a sealing valve.

5. The mold casting device according to claim 1, wherein the rapid cooling structure comprises an air cooling groove (20) formed in the upper mold (3), the air cooling groove (20) comprises a first annular cavity, a second annular cavity and a third annular cavity corresponding to the upper half part, the middle part and the lower half part of the mold cavity (19), the upper end of the first annular cavity is communicated with the output end of a fan in the bellows (1) through an air cooling pipe (17), and the other end of the second annular cavity is sequentially communicated with the second annular cavity and the third annular cavity.

6. The mold casting device according to claim 1, wherein the plunger rod comprises a guide rod (23), the guide rod (23) is inserted into the second through hole (21) formed in the center of the upper mold (3) and the first through hole (11) formed in the center of the lower mold (9) and is in sliding fit with the second through hole (21) and the first through hole (11), the bottom end of the guide rod (23) is fixedly connected with a counterweight sliding block (24) arranged at the intersection of the riser tube (8) and the pouring gate (10), and the counterweight sliding block (24) is in sliding fit with the inner wall of the riser tube (8).

7. The mold casting device according to claim 6, wherein the pneumatic clamp comprises a connecting casing (22), the connecting casing (22) is fixed on the bottom wall of the inner slot (15) and corresponds to the first through hole (11), an annular slot (25) is formed in the center of the connecting casing (22), two symmetrically-arranged movable blocks (26) are arranged in the annular slot (25), the two movable blocks (26) are arranged on two sides of the guide rod (23) and connected with the output end of a movable column (27) arranged in the connecting casing (22), the movable column (27) is communicated with the output end of an air pump arranged in the air box (1) through an air guide pipe (18), and an arc-shaped groove (28) matched with the guide rod (23) is formed on one side of the two movable blocks (26) close to the guide rod (23).

8. The die casting device according to claim 1, wherein a retainer ring (12) is arranged at the edge of the upper end surface of the lower die (9), and the retainer ring (12) is sleeved outside the lower end of the upper die (3) and is matched with the upper die (3).

9. A die casting device according to claim 1, wherein the outer wall of the lower die (9) at the annular runner (13) is provided with an insulating layer (14).

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