CN213224196U

CN213224196U - Fan wheel disappears sandbox for die casting

Info

Publication number: CN213224196U
Application number: CN202021479809.4U
Authority: CN
Inventors: 王学文; 徐华
Original assignee: Nanjing Youlixin Machinery Co ltd
Current assignee: Nanjing Youlixin Machinery Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-05-18
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a fan wheel is sandbox for lost foam casting relates to fan wheel technical field, for solving current sandbox negative pressure uneven problem that distributes when the evacuation. Interior sand box is located the inside of shell body, be provided with the uniform pressure chamber between shell body and the interior sand box, the bottom of interior sand box is provided with first gauze, the side of interior sand box all is provided with the second gauze, main negative pressure pipe is installed to the below of shell body, first branch negative pressure pipe is installed to the one end of main negative pressure pipe, second branch negative pressure pipe is all installed to the both sides of main negative pressure pipe, third branch negative pressure pipe is all installed at both ends around the main negative pressure pipe, and the inside of first branch negative pressure pipe, second branch negative pressure pipe and third branch negative pressure pipe all embedding shell body.

Description

Fan wheel disappears sandbox for die casting

Technical Field

The utility model relates to a fan wheel technical field specifically is a fan wheel disappearance sandbox for die casting.

Background

At present, the fan wheel is processed by adopting lost foam casting, the lost foam casting is a novel casting method for bonding and combining paraffin or foam models with similar sizes and shapes of castings into model clusters, after the paraffin or foam models are coated with refractory paint and dried, the model clusters are buried in dry quartz sand for vibration molding, casting is carried out under negative pressure, so that the model is gasified, liquid metal occupies the position of the model, and the model clusters are solidified and cooled to form castings.

However, the negative pressure distribution of the existing sandbox is not uniform during vacuumizing, so that the existing requirements are not met, and the sandbox for lost foam casting of the fan wheel is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fan wheel is sandbox for lost foam casting to solve the current sandbox that proposes in the above-mentioned background art inhomogeneous problem of negative pressure distribution when the evacuation.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a fan wheel disappearance sandbox for die casting, includes shell body and interior husky case, interior husky case is located the inside of shell body, be provided with the pressure equalizing chamber between shell body and the interior husky case, the bottom of interior sandbox is provided with first gauze, the side of interior sandbox all is provided with the second gauze, main negative pressure pipe is installed to the below of shell body, first branch negative pressure pipe is installed to the one end of main negative pressure pipe, second branch negative pressure pipe is all installed to the both sides of main negative pressure pipe, third branch negative pressure pipe is all installed at both ends around the main negative pressure pipe, and first branch negative pressure pipe, second branch negative pressure pipe and the inside that third branch negative pressure pipe all imbeds the shell body.

Preferably, the upper ends of the outer shell and the inner sand box are provided with damping plates, and the upper ends of the damping plates are provided with pouring cups.

Preferably, a connecting plate is arranged between the outer shell and the inner sand box and is positioned on two sides of the lower end of the inner sand box.

Preferably, the upper end of the connecting plate is provided with a plurality of through grooves.

Preferably, the main negative pressure pipe is connected with the first sub negative pressure pipe, the second sub negative pressure pipe and the third sub negative pressure pipe through six-way joints.

Preferably, the connecting plate is connected with the inner sandbox and the outer shell in a welding mode.

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

1. the utility model discloses a set up the uniform pressure chamber between sandbox and shell body including, when vacuum pump work produced the negative pressure through main negative pressure pipe, first branch negative pressure pipe, second branch negative pressure pipe and third branch negative pressure pipe have negative pressure adsorption affinity in step, carry out the negative pressure to the bottom and the side of internal sandbox and adsorb, and the negative pressure distributes evenly and fast, and the mesh through the gauze produces negative pressure adsorption affinity to the inside dry sand of sandbox to improve the tight real effect of sandbox.

2. The utility model discloses a damping plate replaces plastic film sealed, leaks gas through the damping plate, when the evacuation, lets in the air from the upper surface of damping plate, forms certain flow and satisfies the negative pressure air current of firm molding sand requirement in the sandbox, further improves the tight real effect of sandbox.

Drawings

Fig. 1 is a schematic structural view of a sandbox for lost foam casting of a fan wheel according to the present invention;

FIG. 2 is an overall front view of the sand box for lost foam casting of fan wheels of the present invention;

fig. 3 is a schematic structural diagram of the connection plate of the present invention.

In the figure: 1. an outer housing; 2. an inner sandbox; 3. a pressure equalizing cavity; 4. a first screen; 5. a second screen; 6. a primary negative pressure tube; 7. a first sub-negative pressure pipe; 8. a second sub negative pressure pipe; 9. a third sub-negative pressure pipe; 10. a damping plate; 11. a pouring cup; 12. a connecting plate; 13. a through groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: a sandbox for lost foam casting of fan wheels comprises an outer shell 1 and an inner sandbox 2, wherein the inner sandbox 2 is located inside the outer shell 1, a pressure equalizing cavity 3 is arranged between the outer shell 1 and the inner sandbox 2, a first gauze 4 is arranged at the bottom of the inner sandbox 2, second gauzes 5 are arranged on the side surfaces of the inner sandbox 2, a main negative pressure pipe 6 is arranged below the outer shell 1, a first sub negative pressure pipe 7 is arranged at one end of the main negative pressure pipe 6, second sub negative pressure pipes 8 are arranged on two sides of the main negative pressure pipe 6, third sub negative pressure pipes 9 are arranged at the front end and the rear end of the main negative pressure pipe 6, the first sub negative pressure pipe 7, the second sub negative pressure pipe 8 and the third sub negative pressure pipe 9 are embedded into the outer shell 1, when a vacuum pump works to generate negative pressure through the main negative pressure pipe 6 during casting, the first sub negative pressure pipe 7, the second sub negative pressure pipe 8 and the third sub negative pressure pipe 9, carry out the negative pressure to the bottom and the side of interior sandbox 2 and adsorb, the negative pressure distributes evenly and fast, and the mesh through first gauze 4 and second gauze 5 produces the negative pressure adsorption affinity to the inside dry sand of interior sandbox 2 to the compact effect of sandbox 2 in the improvement.

Further, the upper end of shell body 1 and interior sandbox 2 is provided with damping plate 10, and the upper end of damping plate 10 is provided with pouring basin 11, and when the evacuation, let in the air from the upper surface of damping plate 10, form certain flow and satisfy the negative pressure air current of firm molding sand requirement in interior sandbox 2, further improve the compact effect of interior sandbox 2, improve the casting quality, cast through pouring basin 11, thereby make the inside foam model gasification of interior sandbox 2 disappear and make the molten metal form the foundry goods.

Further, install connecting plate 12 between shell body 1 and interior sandbox 2, and connecting plate 12 is located the both sides of interior sandbox 2 lower extreme, improves joint strength between shell body 1 and the interior sandbox 2, improves the incorruptibility of whole sandbox.

Further, the upper end of connecting plate 12 is provided with a plurality of logical grooves 13, can not influence the degree of consistency that the negative pressure distributes when improving joint strength between shell body 1 and interior sandbox 2, improves the compact effect of interior sandbox 2, improves the casting quality.

Further, main negative pressure pipe 6 and first branch negative pressure pipe 7, second branch negative pressure pipe 8 and third branch negative pressure pipe 9 pass through six-way joint connection, and connected mode is simple, and the installation is convenient and quick with the dismantlement, does benefit to the maintenance.

Further, the connecting plate 12 is connected with the inner sand box 2 and the outer shell 1 in a welding mode, the air tightness and the water tightness of the welding connection are good, the structural rigidity is also high, the structural integrity is good, and meanwhile labor and time are saved.

The working principle is as follows: when the device is used, a foam model for processing the fan wheel is soaked and hung with water-based paint, then the foam model is placed in the inner sand box 2, then dry sand is filled, the jolt ramming table vibrates to enable the dry sand to be filled in the inner sand box 2 and sealed by the damping plate 10, the upper end of the damping plate 10 is provided with the sprue cup 11, casting is carried out through the sprue cup 11, the foam model in the inner sand box 2 is gasified and disappears, so that metal liquid forms a casting, when a vacuum pump works to generate negative pressure through the main negative pressure pipe 6 during casting, the first sub negative pressure pipe 7, the second sub negative pressure pipe 8 and the third sub negative pressure pipe 9 synchronously have negative pressure adsorption force, the negative pressure adsorption is carried out on the bottom and the side surface of the inner sand box 2, the negative pressure is uniformly and rapidly distributed, the negative pressure adsorption force is generated on the dry sand in the inner sand box 2 through the meshes of the first gauze 4 and the second gauze 5, so that the compaction effect of the inner sand box 2 is improved, when the vacuum pumping, let in the air from the upper surface of damping plate 10, form certain flow and satisfy the negative pressure air current of firm molding sand requirement in interior sandbox 2, further improve the compact effect of interior sandbox 2, improve the casting quality, then wait for take out after the fan wheel foundry goods cooling shaping can.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a fan wheel disappearance sandbox for die casting, includes shell body (1) and interior sandbox (2), its characterized in that: interior sandbox (2) is located the inside of shell body (1), be provided with between shell body (1) and interior sandbox (2) equal pressure chamber (3), the bottom of interior sandbox (2) is provided with first gauze (4), the side of interior sandbox (2) all is provided with second gauze (5), main negative pressure pipe (6) is installed to the below of shell body (1), first branch negative pressure pipe (7) are installed to the one end of main negative pressure pipe (6), second branch negative pressure pipe (8) are all installed to the both sides of main negative pressure pipe (6), third branch negative pressure pipe (9) are all installed at both ends around main negative pressure pipe (6), and first branch negative pressure pipe (7), second branch negative pressure pipe (8) and third branch negative pressure pipe (9) all imbed the inside of shell body (1).

2. The sand box for lost foam casting of the fan wheel according to claim 1, wherein: the upper ends of the outer shell (1) and the inner sand box (2) are provided with damping plates (10), and the upper ends of the damping plates (10) are provided with pouring cups (11).

3. The sand box for lost foam casting of the fan wheel according to claim 1, wherein: a connecting plate (12) is installed between the outer shell (1) and the inner sand box (2), and the connecting plate (12) is located on two sides of the lower end of the inner sand box (2).

4. The sand box for lost foam casting of the fan wheel according to claim 3, wherein: the upper end of the connecting plate (12) is provided with a plurality of through grooves (13).

5. The sand box for lost foam casting of the fan wheel according to claim 1, wherein: the main negative pressure pipe (6) is connected with the first sub negative pressure pipe (7), the second sub negative pressure pipe (8) and the third sub negative pressure pipe (9) through a six-way joint.

6. The sand box for lost foam casting of the fan wheel according to claim 3, wherein: the connecting plate (12) is connected with the inner sand box (2) and the outer shell (1) in a welding mode.