A lost foam casting sand box

Abstract

The utility model provides a lost foam casting sand box, comprising a box body, a ventilation chamber is arranged inside the box body, a ventilation inner box is detachably arranged at the center of the ventilation chamber, a casting cavity is arranged inside the ventilation inner box, and ventilation holes for ventilation between the casting cavity and the ventilation chamber are equidistantly arranged on the sides of the ventilation inner box, an embedding groove is arranged on the ventilation inner box outside the ventilation hole, the embedding groove is communicated with the ventilation hole, and a sand isolation net is arranged in the embedding groove through a fixed frame, the ventilation inner box is arranged in the ventilation chamber of the box body, the ventilation inner box is utilized to realize the functions of the lost foam casting cavity and ventilation filtration, the ventilation inner box with ventilation filtration function in the sand box is conveniently disassembled and assembled as a whole, the ventilation holes and sand isolation nets on the ventilation inner box are uniformly cleaned and disassembled and replaced, and the ventilation chamber is conveniently cleaned, thereby improving the disassembly and assembly efficiency and cleaning effect of the ventilation filtration structure of the sand box, and improving the use effect.

Description

Technical Field

[0001] The utility model relates to the technical field of lost foam casting, in particular to a lost foam casting sand box. Background Art

[0002] Lost foam casting (also known as full-mold casting) is a new casting method in which wax or foam models with similar size and shape to the casting are bonded together into a model cluster, coated with refractory paint and dried, and then buried in dry quartz sand inside a sand box for vibration molding. The model is poured under negative pressure to vaporize the model, and the liquid metal occupies the position of the model, which is then solidified and cooled to form a casting.

[0003] The prior art discloses a lost foam casting sand box (publication number: CN212857666U), which includes a sand box body, an air inlet pipe, an air exhaust pipe, a box cover assembly and an air chamber mechanism. The air chamber mechanism is arranged on the inner wall of the sand box body, and the air chamber mechanism includes an air cavity, air vents and a sand isolation net. The air cavities are distributed and installed on the inner wall of the sand box body, and air vents are distributed and opened on the outer wall of one side of the air cavity. A sand isolation net is inlaid and fixed on the inner wall of the air hole, and the sand and gravel filtering effect is achieved by the sand isolation net inside the air hole.

[0004] However, the above technical solution and the prior art still have the following defects: during long-term use of the device, the air vents may be clogged and dust in the sand and gravel may accumulate and adhere to the sand-screening net, causing the sand-screening net to be clogged and affecting the ventilation effect; since the sand-screening net is embedded and fixed on the inner wall of the air vent, it is inconvenient to regularly disassemble and clean the sand-screening net, and dust can easily pass through the sand-screening net into the air cavity in the inner wall of the sand box, causing dust accumulation in the air cavity for a long time; since the air cavity is in a closed state, it is inconvenient to clean the air cavity, affecting the air extraction effect of the sand box. Utility Model Content

[0005] The utility model aims to provide a lost foam casting sand box to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lost foam casting sand box comprises a box body, a ventilation chamber is arranged inside the box body, a ventilation inner box is detachably arranged at the center of the ventilation chamber, a casting cavity is arranged inside the ventilation inner box, and ventilation holes for ventilation between the casting cavity and the ventilation chamber are equidistantly arranged on the sides of the ventilation inner box, an embedding groove is arranged on the ventilation inner box outside the ventilation hole, the embedding groove is communicated with the ventilation hole, and a sand isolation net is arranged in the embedding groove through a fixed frame, and the sand isolation net is arranged on the outside of the ventilation hole and fits with the outer wall of the ventilation hole.

[0008] Preferably, positioning grooves are correspondingly provided on both sides of the embedding groove, the sand-shielding net and the fixed frame, and the sand-shielding net and the fixed frame are fixedly installed in the embedding groove by screws, thereby ensuring the stability of the installation of the sand-shielding net and facilitating the disassembly and assembly of the sand-shielding net.

[0009] Preferably, the vent hole is conical, which effectively reduces the risk of blockage.

[0010] Preferably, the bottom of the ventilation inner box is of a through type, and a folded edge is provided on the inner side of the ventilation inner cavity, the folded edge is used to support the bottom plate, the bottom plate is detachable and has the same structural arrangement as the side edge of the ventilation inner box, and is used to connect the bottom of the ventilation inner box with the ventilation chamber.

[0011] Preferably, support plates are provided on both sides of the bottom of the ventilation inner box, and the support plates are used to separate the bottom of the ventilation inner box from the ventilation chamber inside the box body, thereby improving the air extraction efficiency of the sand box.

[0012] Preferably, a top plate is fixedly mounted on the top of the ventilation inner box, a card slot is provided on the inner side of the bottom of the top plate, the card slot is snap-connected with the top of the box body, and handles are provided in the center of both sides of the top plate to facilitate the disassembly and assembly of the ventilation inner box.

[0013] Preferably, a first mounting hole and a second mounting hole are respectively provided on the top and the top plate of the box body, and the first mounting hole and the second mounting hole are threadedly connected to bolts used for fixing the box body and the ventilation inner box.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. A ventilation inner box is arranged in the ventilation chamber of the box body, and an air chamber for exhausting air is provided between the outer side of the ventilation inner box and the ventilation chamber. The casting function is realized by utilizing the casting chamber of the ventilation inner box, thereby ensuring a good ventilation effect of the sand box during the casting process, and facilitating the disassembly and assembly of the ventilation inner box with ventilation and filtering functions in the sand box as a whole, uniformly disassembling and cleaning the sand and gravel filtering components on the ventilation inner box, and facilitating the cleaning of the ventilation chamber, thereby improving the disassembly and assembly efficiency and the cleaning effect. The ventilation holes provided on the side and the bottom plate of the ventilation inner box are utilized to realize the connection with the ventilation chamber on the box body, and the sand isolation net is fixedly installed on the outer side of the ventilation hole by utilizing a fixing frame, so that the sand isolation net is tightly attached to the outer side wall of the ventilation hole, thereby preventing sand and gravel from entering the ventilation chamber through the ventilation hole, thereby improving the disassembly and assembly efficiency of the sand isolation net, and thereby improving the disassembly and assembly of the overall filtering structure of the sand box;

[0016] 2. By setting a top plate on the top of the ventilation inner box, and the card slot at the bottom of the top plate is snapped into the top of the box body, the positioning installation between the ventilation inner box and the box body is achieved, and the setting of the top plate and the card slot is used to make the box body support the ventilation inner box, avoiding the weight of sand and gravel added to the ventilation inner box from being all attached to the support plate, thereby ensuring the stability of the ventilation inner box in use, and fixing the ventilation inner box in the ventilation chamber of the box body by bolts, which facilitates the disassembly and assembly of the ventilation inner box as a whole and improves the disassembly and assembly efficiency of the ventilation inner box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the separation structure between the ventilation inner box and the box body of the utility model;

[0019] Figure 3 This is a schematic diagram of the inverted structure of the ventilation inner box of the utility model;

[0020] Figure 4 This is a schematic diagram of the bottom split structure of the ventilation inner box of the utility model;

[0021] Figure 5 It is a schematic diagram of the overall sectional front view structure of the utility model.

[0022] In the figure: 1. box body; 2. ventilation chamber; 3. ventilation inner box; 4. ventilation hole; 5. embedding groove; 6. sand filter; 7. fixing frame; 8. folding edge; 9. bottom plate; 10. support plate; 11. top plate; 12. handle; 13. slot; 14. first mounting hole; 15. second mounting hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 , the utility model provides a technical solution:

[0025] Embodiment 1:

[0026] A lost foam casting sand box comprises a box body 1, wherein a ventilation chamber 2 is arranged inside the box body 1, a ventilation inner box 3 is detachably arranged at the center of the ventilation chamber 2, a casting cavity is arranged inside the ventilation inner box 3, and ventilation holes 4 for ventilation between the casting cavity and the ventilation chamber 2 are equidistantly arranged on the side of the ventilation inner box 3, an embedding groove 5 is arranged on the ventilation inner box 3 located outside the ventilation hole 4, the embedding groove 5 is communicated with the ventilation hole 4, and a sand isolation net 6 is arranged in the embedding groove 5 through a fixing frame 7, the sand isolation net 6 is made of dense wire steel, and the sand isolation net 6 is arranged outside the ventilation hole 4 and fits with the outer wall of the ventilation hole 4.

[0027] Positioning grooves are correspondingly provided on both sides of the embedding groove 5, the sand-shielding net 6 and the fixing frame 7. The sand-shielding net 6 and the fixing frame 7 are fixedly installed in the embedding groove 5 by screws, thereby ensuring the stability of the installation of the sand-shielding net 6 and facilitating the disassembly and assembly of the sand-shielding net 6. After the fixing frame 7 is installed in the embedding groove 5, the outer side thereof is in the same plane with the outer side of the ventilation inner box 3, thereby avoiding structural protrusions that affect the integrity and aesthetics.

[0028] The vent hole 4 is tapered, and the tapered vent hole 4 has the characteristic of gradually widening, which effectively reduces the risk of blockage.

[0029] The bottom of the ventilation inner box 3 is of a through type, and a folded edge 8 is provided on the inner side of the ventilation inner cavity. The folded edge 8 is used to support the bottom plate 9. The bottom plate 9 is detachable and has the same structure as the side of the ventilation inner box 3. It is used to connect the bottom of the ventilation inner box 3 with the ventilation chamber 2.

[0030] In the present embodiment, a ventilating inner box 3 is provided in the ventilating chamber 2 of the box body 1, and the casting cavity of the ventilating inner box 3 is utilized to realize the casting function, thereby ensuring a good ventilation effect of the sand box during the casting process, and facilitating the disassembly and assembly of the ventilating inner box 3 as a whole, and uniformly disassembling and cleaning the sand and gravel filtering components on the ventilating inner box 3 to improve the disassembly and assembly efficiency, and utilizing the vent holes 4 provided on the side and the bottom plate 9 of the ventilating inner box 3 to realize the connection with the ventilating chamber 2 on the box body 1, and utilizing the casting cavity of the ventilating inner box 3 to bear the weight of the sand and gravel, and utilizing the fixing frame 7 to fix the sand-shielding net 6 on the outside of the vent hole 4 to prevent the weight of the sand and gravel from squeezing and deforming the sand-shielding net 6 and affecting the filtering effect, so that the sand-shielding net 6 is tightly attached to the outer wall of the vent hole 4 to prevent the sand and gravel from entering the vent chamber 2 through the vent hole 4, thereby achieving an effective protective effect.

[0031] Support plates 10 are provided on both sides of the bottom of the ventilation inner box 3. The support plates 10 are used to separate the bottom of the ventilation inner box 3 from the ventilation chamber 2 inside the box body 1, support the ventilation inner box 3, and improve the air extraction efficiency of the sand box.

[0032] Embodiment 2:

[0033] Based on the first embodiment, the difference from the first embodiment is that:

[0034] A top plate 11 is fixedly installed on the top of the ventilation inner box 3, and a card slot 13 is provided on the inner side of the bottom of the top plate 11. The card slot 13 is snap-connected with the top of the box body 1, and handles 12 are provided in the center of both sides of the top plate 11 to facilitate the disassembly and assembly of the ventilation inner box 3.

[0035] A first mounting hole 14 and a second mounting hole 15 are respectively formed on the top of the box body 1 and the top plate 11 . The first mounting hole 14 and the second mounting hole 15 are threadedly connected with bolts for fixing the box body 1 and the ventilation inner box 3 .

[0036] In this embodiment, a top plate 11 is provided on the top of the ventilation inner box 3, and a slot 13 at the bottom of the top plate 11 is snapped into engagement with the top of the box body 1, so as to achieve positioning and installation between the ventilation inner box 3 and the box body 1, and by utilizing the provision of the top plate 11 and the slot 13, the box body 1 supports the ventilation inner box 3, so as to avoid that the weight of the sand and gravel added to the ventilation inner box 3 is all attached to the support plate 10, so that there is a chamber for gas flow between the outer side of the ventilation inner box 3 and the ventilation chamber 2, so as to achieve the function of pumping negative pressure and ensure the stability of the use of the ventilation inner box 3, and the ventilation inner box 3 is fixedly installed in the ventilation chamber 2 of the box body 1 by bolts, so as to facilitate the disassembly and assembly of the ventilation inner box 3 as a whole, improve the disassembly and assembly efficiency of the ventilation inner box 3, and improve the disassembly and cleaning of the filter structure on the ventilation inner box 3.

[0037] Working principle: After long-term use of the lost foam casting sand box, the vent holes and the filter screen may be blocked, affecting the vacuum negative pressure effect of the sand box during the casting process. Therefore, it is necessary to regularly disassemble, clean or replace the ventilation and filtering structure of the sand box. When it is necessary to disassemble, clean or replace the ventilation and filtering structure of the device, first remove the bolts on the upper part of the box body 1, and then use the handles 12 on both sides of the ventilation inner box 3 to detach the ventilation inner box 3 from the ventilation chamber 2 inside the box body 1, so as to realize the disassembly of the ventilation and filtering structure as a whole, which is convenient for maintenance. After cleaning the ventilation chamber 2 and removing the bottom plate 9 from the bottom of the ventilation inner box 3, remove the screws on the side and bottom plate 9 of the ventilation inner box 3 in turn, and directly remove the fixing frame 7 and the sand-shielding net 6 embedded in the groove 5, and clean or replace the sand-shielding net 6. When the inside of the ventilation hole 4 is clogged due to sand and gravel, clean the ventilation hole 4 to ensure the normal ventilation effect of the ventilation hole 4. After cleaning or replacement, install and fix it again. Finally, fix the ventilation inner box 3 in the ventilation chamber 2 of the box body 1 to complete the installation of the sand box.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lost foam casting sand box, comprising a box body (1), characterized in that: A ventilation chamber (2) is arranged inside the box body (1), a ventilation inner box (3) is detachably arranged at the center of the ventilation chamber (2), a casting cavity is arranged inside the ventilation inner box (3), and ventilation holes (4) for ventilation between the casting cavity and the ventilation chamber (2) are equidistantly arranged on the side of the ventilation inner box (3), an embedding groove (5) is arranged on the ventilation inner box (3) outside the ventilation hole (4), the embedding groove (5) is connected to the ventilation hole (4), and a sand isolation net (6) is arranged in the embedding groove (5) through a fixing frame (7), and the sand isolation net (6) is arranged outside the ventilation hole (4) and fits with the outer wall of the ventilation hole (4).

2. The lost foam casting sand box according to claim 1, characterized in that: Positioning grooves are correspondingly provided on both sides of the embedding groove (5), the sand-isolating net (6) and the fixing frame (7), and the sand-isolating net (6) and the fixing frame (7) are fixedly installed in the embedding groove (5) by screws, thereby ensuring the stability of the installation of the sand-isolating net (6) and facilitating the disassembly and assembly of the sand-isolating net (6).

3. The lost foam casting sand box according to claim 1, characterized in that: The vent hole (4) is tapered, which effectively reduces the risk of blockage.

4. The lost foam casting sand box according to claim 1, characterized in that: The bottom of the ventilation inner box (3) is of a through type, and a folded edge (8) is provided on the inner side of the ventilation inner cavity, the folded edge (8) is used to support the bottom plate (9), the bottom plate (9) is of a detachable type, and has the same structural arrangement as the side of the ventilation inner box (3), and is used to connect the bottom of the ventilation inner box (3) with the ventilation chamber (2).

5. The lost foam casting sand box according to claim 4, characterized in that: Support plates (10) are provided on both sides of the bottom of the ventilation inner box (3), and the support plates (10) are used to separate the bottom of the ventilation inner box (3) from the ventilation chamber (2) inside the box body (1), thereby improving the air extraction efficiency of the sand box.

6. The lost foam casting sand box according to claim 1, characterized in that: A top plate (11) is fixedly mounted on the top of the ventilation inner box (3); a card slot (13) is provided on the inner side of the bottom of the top plate (11); the card slot (13) is card-engaged with the top of the box body (1); handles (12) are provided in the center of both sides of the top plate (11) to facilitate the disassembly and assembly of the ventilation inner box (3).

7. The lost foam casting sand box according to claim 6, characterized in that: A first mounting hole (14) and a second mounting hole (15) are respectively provided on the top end and the top plate (11) of the box body (1), and the first mounting hole (14) and the second mounting hole (15) are threadedly connected to bolts used to fix the box body (1) and the ventilation inner box (3).

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