CN218693671U - Special steel casting lost foam shell precision casting mould - Google Patents

Abstract

The utility model discloses a special steel casting lost foam shell precision casting mould, which comprises a vacuum sand box, wherein fine sand is filled in the vacuum sand box, a heat dissipation mechanism is filled in the fine sand, a vacuumizing mechanism is arranged in the fine sand, a sealing cover plate is arranged above the fine sand, a pair of vertical plates are arranged at the top end of the vacuum sand box, a pair of sliding grooves are arranged on one sides of the two vertical plates which are close to each other, and a sliding seat connected with the sealing cover plate is arranged on each sliding groove; the beneficial effects are that: through setting up motor, riser, spout and slide, can drive sealed apron, intubate, cavity apron and fan and shift up or move down together, sealed apron can extrude the fine sand when moving down, improves the solidity of fine sand, simultaneously with the inner wall in close contact with of vacuum sand box, improves the leakproofness of vacuum sand box top to effectual improvement fine sand effect after the evacuation.

Description

Special steel casting lost foam shell precision casting mould

Technical Field

The utility model relates to a lost foam vacant shell casting technical field particularly, relates to a special steel casting lost foam vacant shell precision casting mould.

Background

The lost foam casting method adopts novel super-strong burning-resistant coating, firstly, EPS foam in a mould is burnt to form a cavity shell mould with very little residual carbon, and then high-temperature molten metal is poured. The special steel casting lost foam empty shell is a lost foam empty shell cast by special steel castings, and a corresponding special steel casting lost foam empty shell precision casting mould is usually used during production.

Before pouring, in order to avoid the liquid metal of the hollow shell of the special steel casting lost foam from diffusing to other parts of the fine sand, the fine sand needs to be vacuumized so as to improve the tightness between the fine sand. When the existing precision casting mould for the lost foam shell of the steel casting is vacuumized, the plastic film is used for covering, the sealing performance is poor, large gaps exist on the upper surface of fine sand, the tightness among the fine sand is low, and the precision of the special lost foam shell of the steel casting is low after the special lost foam shell of the steel casting is formed.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides a special steel casting disappearance mould ghost precision casting mould to overcome the above-mentioned technical problem that current correlation technique exists.

Therefore, the utility model discloses a specific technical scheme as follows:

the special steel casting lost foam precision casting mold comprises a vacuum sand box, fine sand is filled in the vacuum sand box, a heat dissipation mechanism is filled in the fine sand, a vacuumizing mechanism is arranged in the fine sand, a sealing cover plate is arranged above the fine sand, a pair of vertical plates are arranged at the top end of the vacuum sand box, a pair of sliding grooves are formed in one side, close to each other, of each vertical plate, a sliding seat in vertical sliding connection with the sliding grooves is arranged on each sliding groove, a motor is arranged at the top end of one vertical plate, a threaded rod extending into the sliding grooves and penetrating through the sliding seats is arranged at the bottom end of the motor, a plurality of insertion tubes are arranged at the bottom end of the sealing cover plate, a hollow cover plate connected with the sliding seats is arranged at the top end of the sealing cover plate, the inside of the hollow cover plate is communicated with the inside of each insertion tube, a partition plate connected with the inner wall of the vacuum sand box is arranged in the vacuum sand box, a plurality of heat dissipation cylinders are inserted into the top ends of the insertion tubes, the heat dissipation cylinders correspond to the bottom ends of the heat dissipation cylinders, the heat dissipation cylinders extend to the outer wall of the vacuum sand box, a fan is arranged at the top end of the hollow cover plate, and a pouring opening is arranged in the middle of the sand box and a movable pouring opening matched with the pouring opening of the sand box.

Preferably, the heat dissipation mechanism comprises a refrigeration chamber located on one side of the back face of the vacuum sand box, a circulating water pump is arranged in the middle of the back face of the vacuum sand box, and circulating heat dissipation water pipes communicated with each other are arranged at two ends of the circulating water pump.

Preferably, circulation heat dissipation water pipe includes the heat dissipation water pipe of two inseparable laminatings, circulating water pump's front end is equipped with the inlet tube, just the inlet tube is T type structure, just the inlet tube simultaneously with two the heat dissipation water pipe is connected, circulating water pump's rear end is equipped with and runs through the outlet pipe of refrigeration room, just the outlet pipe is T type structure, the outlet pipe simultaneously with two the heat dissipation water pipe is connected, the outlet pipe with the inlet tube all overlaps and is equipped with the insulation cover.

Preferably, the heat dissipation water pipe is wound on each heat dissipation cylinder, and the height of the heat dissipation water pipe is greater than that of the hollow shell of the lost foam.

Preferably, the vacuumizing mechanism comprises a vacuum pump positioned on the other side of the back of the vacuum sand box, an air exhaust pipeline connected with the vacuum pump is arranged at the top end of the partition plate and is of a mosquito-repellent incense-shaped structure, a plurality of through holes are formed in the surface of the air exhaust pipeline, and the air exhaust pipeline is sleeved with a filtering cotton sleeve matched with the air exhaust pipeline.

Preferably, a lifting device is arranged at the bottom end inside the vacuum sand box, and a top piece penetrating to the upper portion of the partition plate is arranged at the top end of the lifting device.

Preferably, the bottom end of the partition plate is provided with a vacuum insulation plate, and the lower part of the heat dissipation cylinder and the top piece are both non-heat-conducting materials.

The utility model has the advantages that:

1. the motor, the vertical plate, the sliding chute and the sliding seat are arranged to drive the sealing cover plate, the insertion pipe, the hollow cover plate and the fan to move upwards or downwards together, the sealing cover plate can extrude fine sand when moving downwards, the compactness of the fine sand is improved, and meanwhile, the sealing cover plate is tightly contacted with the inner wall of the vacuum sand box, the sealing performance of the upper part of the vacuum sand box is improved, so that the effect of the fine sand after being vacuumized is effectively improved;

2. through setting up heat dissipation drum and rather than sliding connection's intubate, the cooperation fan, can continuously provide the scattered hot-blast for the inside of heat dissipation drum, the radiating effect of effectual improvement heat dissipation drum, set up the inlet tube and the drain pipe of two heat dissipation water pipes and the T type structure of closely laminating simultaneously, can be even take away the heat in the fine sand, and the heat dissipation water pipe box is in the top of every heat dissipation drum, thereby the radiating effect of the whole vacuum sand box of further improvement, and realize the shaping of special foundry goods disappearance mould vacant shell fast.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a special steel casting lost foam precision casting mold according to an embodiment of the present invention;

FIG. 2 is a top cross-sectional view of a vacuum flask in a lost foam precision casting mold for special steel castings according to an embodiment of the present invention;

fig. 3 is a partial front cross-sectional view of a vacuum flask in a special steel casting lost foam precision casting mold according to an embodiment of the present invention.

In the figure:

1. a vacuum flask; 2. fine sand; 3. sealing the cover plate; 4. a vertical plate; 5. a chute; 6. a slide base; 7. Inserting a tube; 8. a partition plate; 9. a heat-dissipating cylinder; 10. a fan; 11. a pouring gate; 12. a removable cover plate; 13. A refrigeration compartment; 14. a water circulating pump; 16. a heat dissipation water pipe; 17. a water inlet pipe; 18. a water outlet pipe; 19. a motor; 20. a vacuum pump; 21. an air extraction pipeline; 22. a lifting device; 23. a top piece; 24. a vacuum insulation panel; 25. a hollow cover plate.

Detailed Description

To further illustrate the various embodiments, the present invention provides the accompanying drawings, which are part of the disclosure and which are primarily intended to illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and, by reference to these drawings, those of ordinary skill in the art will understand the principles of the invention and its advantages, with reference to the drawings and figures, in which elements are not drawn to scale and like elements are generally designated by like reference numerals.

According to the utility model discloses an embodiment provides a special steel casting disappearance mould ghost precision casting mould.

The first embodiment;

as shown in fig. 1-3, according to the special steel casting lost foam precision casting mould of the embodiment of the present invention, including vacuum flask 1, vacuum flask 1 is filled with fine sand 2, fine sand 2 is filled with heat dissipation mechanism, fine sand 2's inside is equipped with evacuation mechanism, fine sand 2's top is equipped with sealed apron 3, vacuum flask 1's top is equipped with a pair of riser 4, two one side that riser 4 is close to each other all is equipped with a pair of spout 5, every all be equipped with on the spout 5 rather than vertical sliding connection's slide 6, one of them the riser 4's top is equipped with motor 19, motor 19's bottom is equipped with the threaded rod that extends to inside of spout 5 and runs through slide 6, sealed apron 3's bottom is equipped with a plurality of intubate 7, sealed apron 3's top be equipped with the cavity apron 25 that slide 6 is connected, the inside of cavity apron 25 with every intubate 7 is linked together, vacuum flask 1's inside is equipped with the baffle 8 that is connected with its inner wall, the top of baffle 8 is equipped with a plurality of heat dissipation drum 9, and every the heat dissipation apron 7 corresponds the heat dissipation apron 11 top of the equal is equipped with the heat dissipation cover plate 10 and the heat dissipation cover plate 11 is equipped with the top of the heat dissipation cylinder 10 that all extends to the top of the vacuum flask 4.

Example two;

as shown in fig. 1-3, according to the utility model discloses special steel foundry goods disappearance mould vacant shell precision casting mould of embodiment, heat dissipation mechanism is including being located the refrigeration room 13 of vacuum sand box 1 back one side plays the refrigeration effect, can cool off to higher temperature, the back middle part of vacuum sand box 1 is equipped with circulating water pump 14, can guarantee the circulation mobility of circulation heat dissipation water pipe, circulating water pump 14's both ends are equipped with the circulation heat dissipation water pipe that is linked together, circulation heat dissipation water pipe includes two heat dissipation water pipes 16 that closely laminate, circulating water pump 14's front end is equipped with inlet tube 17, just inlet tube 17 is T type structure, just inlet tube 17 is simultaneously with two heat dissipation water pipe 16 is connected, circulating water pump 14's rear end is equipped with and runs through the outlet pipe 18 of refrigeration room 13, just outlet pipe 18 is T type structure, outlet pipe 18 simultaneously with two heat dissipation water pipe 16 is connected, outlet pipe 18 with inlet tube 17 all overlaps and is equipped with the insulation cover, avoids outlet pipe 18, the inside cold water that enters into heat dissipation water pipe 16 inside to make to enter into the heat dissipation water pipe 16 be the effectual improvement heat dissipation water pipe 16, the heat dissipation effect of every heat dissipation pipe 16 is higher than the heat dissipation water pipe 16 of cooling pipe 16, the effectual cooling pipe is equipped with the heat dissipation shell height of drum is not wrapped up.

Example three;

as shown in fig. 1-3, according to the utility model discloses special steel casting disappearance mould ghost precision casting mould, evacuation mechanism is including being located the vacuum pump 20 of vacuum sand box 1 back opposite side, the top of baffle 8 be equipped with the exhaust duct 21 that vacuum pump 20 is connected, exhaust duct 21 is mosquito-repellent incense column structure, improves the homogeneity of the evacuation of fine sand 2, guarantees compactness and solidity between fine sand 2, exhaust duct 21's surface is equipped with a plurality of through-hole, just exhaust duct 21 all overlaps and is equipped with rather than assorted filtration cotton cover, avoids fine sand 2 to enter into inside exhaust duct 21, has good effect of blockking.

Example four;

as shown in fig. 1-3, according to the utility model discloses special steel casting lost foam shell precision casting mould of embodiment, the inside bottom of vacuum sand box 1 is equipped with elevating gear 22, elevating gear 22's top be equipped with run through to the head piece 23 of baffle 8 top can be between with special steel casting lost foam shell top to the surface of fine sand 2 after the inside solidification moulding of fine sand 2 to be convenient for staff's taking out.

Example five;

as shown in fig. 1-3, according to the utility model discloses special steel casting disappearance mould ghost precision casting mould of embodiment, the bottom of baffle 8 is equipped with vacuum insulation board 24, the lower part of heat dissipation drum 9 and top member 23 is the non-heat-conducting material, can avoid the inside heat of fine sand 2 to lead into the below of baffle 8.

For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.

In practical application, an EPS foam pattern is buried in fine sand 2, the upper surface of the fine sand 2 is leveled, a motor 19 is started, a threaded rod rotates to drive a sliding seat 6, a hollow cover plate 25, a fan 10, a sealing cover plate 3 and an insertion pipe 7 to vertically move downwards together (the insertion pipe 7 is in sealing connection with a heat dissipation cylinder 9 at all times, and the fine sand 2 cannot enter the heat dissipation cylinder 9), until the sealing cover plate 3 is tightly attached to the upper surface of the fine sand 2 (the side wall of the sealing cover plate 3 is tightly contacted with the inner wall of a vacuum sand box 1), a vacuum pump 20 is started, air in the fine sand 2 can be pumped out through an air pumping pipeline 21 with a through hole, the sealing performance of the fine sand 2 is improved, after the sealing is finished, a movable cover plate 12 is opened, the EPS foam pattern is ignited from a pouring port 11, and after the combustion is finished, pouring the liquid metal of the special steel casting lost foam empty shell into the pouring gate 11, starting the fan 10, supplying air to the inside of the hollow cover plate 25, uniformly supplying air to the insides of each insertion pipe 7 and the heat dissipation cylinder 9, simultaneously starting the circulating water pump 14 and the refrigerating chamber 13, and keeping the inside cyclicity of the heat dissipation water pipes 16, wherein the two heat dissipation water pipes 16 are tightly attached, and the water inlet pipe 17 and the water outlet pipe 18 are both in a T-shaped structure, so that the water inlet pipe 17 and the water outlet pipe 18 have two connecting directions which correspond to each other, and the heat generated inside the fine sand 2 can be uniformly absorbed.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The special steel casting lost foam precision casting mold is characterized by comprising a vacuum sand box (1), fine sand (2) is filled in the vacuum sand box (1), a heat dissipation mechanism is filled in the fine sand (2), a vacuumizing mechanism is arranged in the fine sand (2), a sealing cover plate (3) is arranged above the fine sand (2), a pair of vertical plates (4) are arranged at the top end of the vacuum sand box (1), a pair of sliding grooves (5) are respectively arranged at one side, close to each other, of the two vertical plates (4), a sliding seat (6) in vertical sliding connection with the sliding seat is arranged on each sliding groove (5), a motor (19) is arranged at the top end of one vertical plate (4), a bottom end of the motor (19) is provided with a hollow threaded rod (7) extending into the sliding seat (5) and penetrating through the sliding seat (6), a plurality of inserting tubes (7) are arranged at the bottom end of the sealing cover plate (3), a hollow barrel (25) connected with the sliding seat (6) is arranged at the top end of the sealing cover plate (3), the hollow cover plate (25) is communicated with the inside of each inserting rod (7), a plurality of the heat dissipation partition plates (9) are arranged corresponding to the heat dissipation cylinder (8), the bottom end of each heat dissipation cylinder (9) extends to the outer wall of the vacuum sand box (1), a fan (10) is arranged at the top end of the hollow cover plate (25), a pouring port (11) is arranged in the middle of the top end of the vertical plate (4), and a movable cover plate (12) matched with the pouring port (11) is arranged at the top end of the pouring port (11).

2. The special steel casting lost foam precision casting mold according to claim 1, wherein the heat dissipation mechanism comprises a refrigeration chamber (13) located on one side of the back surface of the vacuum sand box (1), a circulating water pump (14) is arranged in the middle of the back surface of the vacuum sand box (1), and circulating heat dissipation water pipes communicated with each other are arranged at two ends of the circulating water pump (14).

3. The special steel casting lost foam precision casting mould of claim 2, characterized in that, the circulation heat dissipation water pipe includes two heat dissipation water pipes (16) that closely laminate, the front end of circulating water pump (14) is equipped with inlet tube (17), just inlet tube (17) are T type structure, just inlet tube (17) are simultaneously with two heat dissipation water pipe (16) are connected, the rear end of circulating water pump (14) is equipped with outlet pipe (18) that runs through refrigeration room (13), just outlet pipe (18) are T type structure, outlet pipe (18) are simultaneously with two heat dissipation water pipe (16) are connected, outlet pipe (18) with inlet tube (17) all overlap and are equipped with the insulation cover.

4. The precision casting mold for the lost foam shell of the special steel casting according to claim 3, characterized in that the heat-dissipating water pipes (16) are wound on each heat-dissipating cylinder (9), and the height of the heat-dissipating water pipes (16) is greater than that of the lost foam shell.

5. The special steel casting lost foam precision casting mold according to claim 1, wherein the vacuum pumping mechanism comprises a vacuum pump (20) located on the other side of the back of the vacuum sand box (1), an air pumping pipeline (21) connected with the vacuum pump (20) is arranged at the top end of the partition plate (8), the air pumping pipeline (21) is of a mosquito-repellent incense-shaped structure, a plurality of through holes are formed in the surface of the air pumping pipeline (21), and the air pumping pipeline (21) is sleeved with a filtering cotton sleeve matched with the air pumping pipeline.

6. The precision casting mold for the lost foam hollow shell of the special steel casting according to claim 1, characterized in that the bottom end inside the vacuum sand box (1) is provided with a lifting device (22), and the top end of the lifting device (22) is provided with a top piece (23) penetrating above the partition plate (8).

7. The precision casting mold for the lost foam shell of the special steel casting according to claim 6, characterized in that the bottom end of the partition plate (8) is provided with a vacuum insulation plate (24), and the lower part of the heat-radiating cylinder (9) and the top piece (23) are both non-heat conductive materials.

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