Lost foam casting negative pressure sandbox

Abstract

The utility model relates to the technical field of lost foam casting, in particular to a lost foam casting negative pressure sandbox which comprises a base plate, a plurality of sandbox assemblies are arranged at the top of the base plate, upper connecting blocks are fixedly installed above the two sides of each sandbox assembly, and limiting grooves are formed in the sides, away from the sandbox assemblies, of the upper connecting blocks. According to the lost foam casting negative-pressure sand box, through cooperative use of the base plate, the sand box assembly bodies, the positioning grooves, the lower connecting blocks, the mounting grooves, the upper connecting blocks, limiting grooves, concentric-square-shaped positioning pieces, butterfly nuts, bolts and concentric-square-shaped sealing grooves, a certain number of sand box assembly bodies can be assembled to expand the internal volume of the sand box, and the requirements of different casting processes and castings are met; the situation that a user needs to independently prepare sandboxes of different sizes according to each requirement is avoided, the cost and occupied space of equipment are reduced, and the flexibility and applicability of the sandboxes are improved.

Description

Technical Field

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

[0002] Lost foam casting is a solid casting method that uses dry sand without binder and vacuum technology to make foam plastic molds. It is a new casting method that combines foam models with similar size and shape to the casting into a model cluster, brushes refractory coating and dries it, buries it in dry quartz sand and vibrates it to shape it, and pours it under negative pressure to vaporize the model, so that liquid metal occupies the model position and forms a casting after solidification and cooling.

[0003] The Chinese patent with publication number CN211803703U discloses a special sand box for lost foam casting with negative pressure. The design of the scraper bottom plate makes it easy to fill the sand surface by sliding the scraper bottom plate back and forth when filling sand into the sand box body. The design of the scraper side plate makes it easy to avoid the gravel spreading to the top of the scraper bottom plate when flattening. The design of the scraper storage groove makes it easy to store the scraper bottom plate in the scraper storage groove after flattening. The design of the L-shaped limit rod and the limit rod slide groove makes it easy to adjust the position of the scraper side plate on the scraper bottom plate.

[0004] With respect to the above-mentioned related technologies, the sandbox has some shortcomings. In actual use, the sandbox is an integral structure and the internal volume cannot be expanded by assembly to meet the needs of different casting processes and castings. Users must prepare sandboxes of different sizes separately for each need, which increases equipment costs and occupied space and reduces the flexibility and applicability of the sandbox. Therefore, it is necessary to provide a lost foam casting negative pressure sandbox to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a lost foam casting negative pressure 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 negative pressure sandbox, comprising:

[0008] A base plate, wherein a plurality of sandbox assemblies are arranged on the top of the base plate, upper connecting blocks are fixedly installed on the upper sides of the sandbox assemblies, a limiting groove is provided on the side of the upper connecting block away from the sandbox assemblies, and lower connecting blocks are fixedly installed on the lower sides of the sandbox assemblies;

[0009] A mounting groove is provided on one side of the lower connecting block away from the sandbox assembly, a bolt is hinged on the mounting groove, a butterfly nut is threadedly connected on the outer wall of the bolt, and positioning grooves are provided on both sides of the base plate.

[0010] Preferably, symmetrically distributed universal wheels are fixedly mounted on both sides of the bottom of the base plate.

[0011] Preferably, symmetrically distributed threaded holes are provided on both sides of the top of the base plate, and an adjusting screw is threadedly connected to the threaded hole. A turntable is fixedly mounted on the top of the adjusting screw, and a pressure plate is rotatably mounted on the bottom of the adjusting screw.

[0012] Preferably, a non-slip pad is bonded to the bottom of the pressing plate.

[0013] Preferably, a return-shaped positioning piece is fixedly installed on the bottom of the sandbox assembly, and return-shaped sealing grooves are provided on the tops of the sandbox assembly and the base plate, and the return-shaped sealing grooves are matched with the return-shaped positioning piece.

[0014] Preferably, a sealing gasket is provided on the inner wall of the meander-shaped sealing groove.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can assemble a certain number of sandbox assemblies to expand the internal volume of the sandbox through the coordinated use of a base plate, a sandbox assembly, a positioning groove, a lower connecting block, an installation groove, an upper connecting block, a limit groove, a round-shaped positioning piece, a butterfly nut, a bolt and a round-shaped sealing groove, so as to meet the needs of different casting processes and castings, avoid the user having to prepare sandboxes of different sizes separately for each need, reduce the cost and occupied space of the equipment, and improve the flexibility and applicability of the sandbox. At the same time, the sandbox has a simple assembly method, is easy to quickly disassemble and assemble, improves the convenience of people's use, and has extremely high practicality.

[0017] 2. The utility model uses a universal wheel, a turntable, an adjusting screw and a pressure plate in coordination. During the use of the sandbox, the universal wheel can be used to roll in contact with the ground to push the sandbox as a whole to move, avoiding the user from relying on too much manpower and material resources to carry it, further improving the convenience of use. In addition, when the sandbox is in stationary use, the turntable can be rotated to make the pressure plate contact with the ground, increasing the contact area and friction between the entire device and the ground, ensuring the stability of the sandbox when in stationary use, and facilitating the stable implementation of the entire casting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the circular positioning member in the utility model;

[0021] Figure 4 It is a bottom view structural schematic diagram of the medium pressure plate of the utility model.

[0022] In the figure: base plate 1, sandbox assembly 2, universal wheel 3, positioning groove 4, lower connecting block 5, mounting groove 6, upper connecting block 7, limit groove 8, turntable 9, adjusting screw 10, threaded hole 11, pressure plate 12, circular positioning piece 13, anti-slip pad 14, butterfly nut 15, bolt 16, circular sealing groove 17. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] 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.

[0027] See also Figure 1-4 , an embodiment provided by the utility model:

[0028] A lost foam casting negative pressure sandbox, comprising:

[0029] A substrate 1, a plurality of sandbox assemblies 2 are arranged on the top of the substrate 1, upper connecting blocks 7 are fixedly installed on the upper sides of the sandbox assemblies 2, a limiting groove 8 is provided on the side of the upper connecting block 7 away from the sandbox assemblies 2, and lower connecting blocks 5 are fixedly installed on the lower sides of the sandbox assemblies 2;

[0030] A mounting groove 6 is provided on the side of the lower connecting block 5 away from the sandbox assembly 2 , a bolt 16 is hinged on the mounting groove 6 , a butterfly nut 15 is threadedly connected to the outer wall of the bolt 16 , and positioning grooves 4 are provided on both sides of the base plate 1 .

[0031] Both sides of the bottom of the base plate 1 are fixedly mounted with symmetrically distributed universal wheels 3, and the sandbox can be pushed to move as a whole through rolling contact with the ground, avoiding the user relying on too much manpower and material resources to carry it.

[0032] In one of the embodiments, symmetrically distributed threaded holes 11 are provided on both sides of the top of the base plate 1, and an adjusting screw rod 10 is threadedly connected to the threaded hole 11. A turntable 9 is fixedly installed on the top of the adjusting screw rod 10, and a pressure plate 12 is rotatably installed on the bottom end of the adjusting screw rod 10. By rotating the turntable 9, the pressure plate 12 can be brought into contact with the ground, thereby increasing the contact area and friction between the entire device and the ground, thereby ensuring the stability of the sandbox when it is in static use.

[0033] In one of the preferred embodiments, a non-slip pad 14 is bonded to the bottom of the pressing plate 12, which increases the friction between the pressing plate 12 and the ground, and further improves the stability of the sandbox when it is in static use.

[0034] In one of the embodiments, a round-shaped positioning piece 13 is fixedly installed at the bottom of the sandbox assembly 2, and a round-shaped sealing groove 17 is opened on the top of the sandbox assembly 2 and the base plate 1, and the round-shaped sealing groove 17 is adapted to the round-shaped positioning piece 13, so that the assembled sandbox is more stable.

[0035] In one of the preferred embodiments, a sealing gasket is provided on the inner wall of the round-shaped sealing groove 17 to ensure the sealing of each connection point of the sandbox after assembly.

[0036] The working principle of the utility model is as follows: the parts not involved in the device are the same as the prior art or can be implemented by the prior art. When the sandbox is in use, the sandbox assembly 2 can be directly inserted into the inside of the round-shaped sealing groove 17 at the top of the substrate 1 through the round-shaped positioning piece 13 at the bottom thereof, and then the bolts 16 at the bottom of the two sides of the sandbox assembly 2 are rotated to make the bolts 16 rotate into the inside of the positioning groove 4, and at the same time, the butterfly nuts 15 are tightened to make the butterfly nuts 15 tightly contact the top of the substrate 1, so as to complete the assembly and fixation between the sandbox assembly 2 and the substrate 1. Through this assembly method, a certain number of sandbox assemblies 2 can be assembled to expand the internal volume of the sandbox to meet the needs of different casting processes and castings, avoiding the need for users to prepare sandboxes of different sizes separately for each need, reducing the cost and occupied space of the equipment, and improving the flexibility and applicability of the sandbox. At the same time, the assembly method of the sandbox is simple, easy to quickly disassemble and assemble, and improves the convenience of people's use, and has extremely high practicality.

[0037] During the use of the sandbox, the universal wheel 3 can be used to roll with the ground to push the sandbox as a whole to move, avoiding the user relying on too much manpower and material resources to carry it, further improving the convenience of its use. In addition, when the sandbox is in use, the turntable 9 can be rotated, and the rotation of the turntable 9 drives the adjusting screw 10 to rotate. Through the threaded transmission of the adjusting screw 10 and the threaded hole 11, the adjusting screw 10 can move vertically during rotation. The movement of the adjusting screw 10 drives the pressure plate 12 to move, so that the pressure plate 12 contacts the ground, increasing the contact area and friction between the entire device and the ground, ensuring the stability of the sandbox when in use, and facilitating the stable implementation of the entire casting process.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A negative pressure sandbox for lost foam casting, characterized in that: It includes: A base plate (1), wherein a plurality of sandbox assemblies (2) are arranged on the top of the base plate (1), upper connecting blocks (7) are fixedly installed above both sides of the sandbox assemblies (2), a limiting groove (8) is provided on a side of the upper connecting block (7) away from the sandbox assemblies (2), and lower connecting blocks (5) are fixedly installed below both sides of the sandbox assemblies (2); A mounting groove (6) is provided on a side of the lower connecting block (5) away from the sandbox assembly (2), a bolt (16) is hingedly connected to the mounting groove (6), a butterfly nut (15) is threadedly connected to the outer wall of the bolt (16), and positioning grooves (4) are provided on both sides of the base plate (1).

2. The lost foam casting negative pressure sandbox according to claim 1, characterized in that: Universal wheels (3) that are symmetrically distributed are fixedly mounted on both sides of the bottom of the base plate (1).

3. The lost foam casting negative pressure sandbox according to claim 2, characterized in that: Both sides of the top of the base plate (1) are provided with symmetrically distributed threaded holes (11), an adjusting screw rod (10) is threadedly connected to the threaded hole (11), a rotating disk (9) is fixedly mounted on the top end of the adjusting screw rod (10), and a pressing plate (12) is rotatably mounted on the bottom end of the adjusting screw rod (10).

4. The lost foam casting negative pressure sandbox according to claim 3, characterized in that: An anti-slip pad (14) is bonded to the bottom of the pressing plate (12).

5. The lost foam casting negative pressure sandbox according to claim 1, characterized in that: A circular positioning piece (13) is fixedly mounted on the bottom of the sandbox assembly (2), and a circular sealing groove (17) is provided on the top of both the sandbox assembly (2) and the base plate (1), and the circular sealing groove (17) is adapted to fit the circular positioning piece (13).

6. The lost foam casting negative pressure sandbox according to claim 5, characterized in that: A sealing gasket is provided on the inner wall of the circular sealing groove (17).

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