Sand box

Abstract

The utility model relates to the technical field of casting sand boxes, and discloses a sand box which comprises a box body, the box body is provided with a plurality of partition plates; the box body is divided into a plurality of accommodating spaces for accommodating breathable sand by the plurality of partition plates; a cooling plate is arranged at the top of the box body; a cooling boss is arranged on the surface of the cooling plate; a first sand hanging strip and a sand hanging groove are arranged on the surface of the cooling boss; second sand hanging strips are arranged on the inner side of the periphery of the box body. According to the sand box, heat dissipation of the mold can be uniform, and breathable sand is not prone to falling off.

Description

Technical Field

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

[0002] Mold casting refers to a casting method that produces castings in a mold. Steel, iron and most nonferrous alloy castings can be obtained by mold casting. Since the molding materials used in mold casting are cheap and easy to obtain, the mold is simple to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings, it has long been a basic process in casting production. In the casting process, in order to make the temperature changes at various locations on the bottom of the mold roughly the same, it is necessary to add breathable sand and chilled iron into the sand box to make the temperature of various locations of the casting the same, so as to prevent uneven internal stress of the casting due to different temperature changes at various locations during the cooling process, resulting in cracks, low hardness or pores.

[0003] However, it is necessary to add chilled iron to the sand box every time, which increases the workload of the staff. In addition, there are no air holes in the chilled iron, which is prone to air holes. Secondly, in the prior art, partitions are used to divide the square outer frame into multiple areas, and air-permeable sand is added to the areas. However, there are no air holes between the partitions, which may cause the temperature of each area to be inconsistent, the heat dissipation is uneven, and the air permeability is poor, resulting in cracks or air holes in the casting. Moreover, the air-permeable sand is easy to fall off when only the partition is used to fill the air-permeable sand.

[0004] CN201520991253 discloses a precision casting chilled sand box, a precision casting chilled sand box, wherein the square outer frame of the sand box is designed with mutually perpendicular longitudinal and transverse barriers, and lifting handles are respectively designed on both sides of the outer frame. The longitudinal and transverse barriers evenly divide the outer frame into four areas, and the four areas are respectively designed with short longitudinal and transverse barriers. A bottom plate is designed at the bottom of the sand box, and the bottom plate is connected to the lower sides of the longitudinal barriers, transverse barriers, short longitudinal barriers and short transverse barriers as a whole. A vent is designed in the center of the square frame surrounded by the short longitudinal barriers and short transverse barriers, and the through hole of the vent runs through the bottom plate. The sand box increases the heat dissipation capacity and heat dissipation uniformity of the sand box by adding a bottom plate and a vent pipe, but the bottom plate is set on the entire bottom, which will increase the weight of the sand box and increase the cost. Moreover, after filling with breathable sand, the breathable sand is easy to fall off from the sand box because the longitudinal and transverse barriers are smooth planes.

[0005] The technical problem to be solved by the utility model is: how to make the heat dissipation of the mold uniform and the air-permeable sand not easy to fall off. Utility Model Content

[0006] The main purpose of the utility model is to provide a sand box, by arranging the first sand hanging strip and the sand hanging groove on the surface of the second sand hanging strip and the cooling boss on the inner side of the box body, so that the breathable sand will not fall off from the sand box easily after the breathable sand is put in. Secondly, by arranging the cooling boss instead of the cold iron to quench the casting, the bottom of the casting can dissipate heat evenly, the performance of the casting is stable, and the yield rate and efficiency are improved.

[0007] To achieve the above objectives, the technical solutions adopted in this application are:

[0008] A sand box comprises a box body; the box body is provided with a plurality of partitions; the plurality of partitions divide the box body into a plurality of accommodating spaces for accommodating breathable sand; a cooling plate is provided on the top of the box body; a cooling boss is provided on the surface of the cooling plate; a first sand hanging strip and a sand hanging groove are provided on the surface of the cooling boss; a second sand hanging strip is provided on the inner side around the box body.

[0009] Preferably, the sand hanging bars and the sand hanging grooves are arranged at intervals on the surface of the cooling boss.

[0010] Preferably, the cooling plate is in a cross shape; the cooling boss is in a cross shape.

[0011] Preferably, the box body is provided with a reinforcement block; the reinforcement block is provided with a lifting column; the side of the box body is provided with a plurality of reinforcement ribs; the upper surface of the box body is provided with a plurality of connection grooves connected to other sand boxes.

[0012] Preferably, the top of the box body is provided with an annular boss for combining with other sand boxes.

[0013] Preferably, the annular boss is in the shape of a quadrilateral; and buffer blocks are provided at the corners of the annular boss.

[0014] Preferably, the side surfaces of the partition and the cooling boss are both provided with ventilation holes.

[0015] Compared with the prior art, this solution has the following beneficial effects:

[0016] The sand box in this case is provided with a second sand hanging bar and a first sand hanging groove on the surface of a cooling boss on the inner side around the box body, so that after the sand box is filled with breathable sand and compacted, the breathable sand can adhere to the sand hanging bar and the sand hanging groove. The sand hanging bar and the sand hanging groove provide support for the breathable sand to prevent the breathable sand from escaping from the sand box after compaction.

[0017] Secondly, in order to make the heat dissipation at the bottom of the casting more uniform, ventilation holes are set on the partition, cooling boss and cooling plate, so that the breathable sand in each accommodation space can better transfer heat, making the temperature of each accommodation space consistent. In addition, the cooling boss can speed up the cooling of the casting, without the need for cold iron, reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the sand box (front) of Example 1;

[0019] Figure 2 It is a structural schematic diagram of the sand box (back side) of Example 1;

[0020] Figure 3 It is a front view of the sand box of Example 1;

[0021] Figure 4 This is a side view of the sand box of Example 1. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the present application implemented as described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Example 1

[0024] refer to Figure 1-4 A sand box comprises a box body 1; the box body 1 is provided with a plurality of partitions 2; the plurality of partitions 2 divide the box body 1 into a plurality of accommodating spaces 3 for accommodating breathable sand; a cooling plate 4 is provided on the top of the box body 1; a cooling boss 5 is provided on the surface of the cooling plate 4; a first sand hanging strip 6 and a sand hanging groove 7 are provided on the surface of the cooling boss 5; a second sand hanging strip 8 is provided on the inner side around the box body 1.

[0025] In this embodiment, the sand box is used to support the mold and cool the mold during the casting process. This sand box can be used in combination with other external sand boxes. The box body 1 is provided with a partition 2, and the breathable sand is placed in the accommodating space 3, and the breathable sand in the accommodating space 3 is compacted. The breathable sand is fixed in the sand box through the action of the partition 2. In addition, by providing the first sand hanging bar 6, the second sand hanging bar 8 and the sand hanging groove 7, the breathable sand is tightly fixed in the sand box to prevent the breathable sand from detaching from the sand box during the transportation process, which affects the processing of the casting.

[0026] Secondly, the mold is placed in the sand box. After casting, the casting needs to be cooled and shaped. Therefore, the sand box is provided with a cooling boss 5. The cooling boss 5 can accelerate the cooling of the casting and prevent the cooling speed of the local position of the casting from being inconsistent, which may cause cracks or fractures in the casting, thereby ensuring the stable performance of the casting. By providing the cooling boss 5, the role of the cold iron can be replaced, the workload of the staff can be reduced, and the efficiency can be improved.

[0027] Preferably, the sand hanging bars and the sand hanging grooves 7 are arranged at intervals on the surface of the cooling boss 5 .

[0028] In this embodiment, the sand hanging strips and the sand hanging grooves 7 are arranged at intervals on the surface of the cooling boss 5, so that after the breathable sand is compacted in the sand box, the contact area with the sand box is increased, so that the breathable sand is not easy to fall off from the sand box during the transportation of the sand box.

[0029] Preferably, the cooling plate 4 is in a cross shape; the cooling boss 5 is in a cross shape.

[0030] In this embodiment, the cooling plate 4 and the cooling boss 5 are both in the shape of a cross. The cooling plate 4 only covers part of the accommodation space 3, and a part of the accommodation space 3 is left unsealed. The purpose is to allow the gas inside the mold to be discharged from the accommodation space 3 connected to the outside after casting, so as to prevent the presence of gas in the casting, thereby causing poor porosity. Secondly, the length of the four ends of the cross of the cooling boss 5 is smaller than the length of the four ends of the cross of the cooling plate 4. By setting the cooling plate 4 and the cooling boss 5 of different heights, the contact area of ​​the breathable sand is further increased to prevent the breathable sand from falling off.

[0031] Preferably, the box body 1 is provided with a reinforcement block 9; the reinforcement block 9 is provided with a lifting column 10; a plurality of reinforcement ribs 11 are provided on the side of the box body 1; and a plurality of connection grooves 12 for connecting with other sand boxes are provided on the upper surface of the box body 1.

[0032] In this embodiment, the box body 1 is provided with reinforcing ribs 11 to strengthen the relatively thin plate-like structure in the sand box, so as to prevent the side wall of the sand box from breaking when the sand box is combined with the external sand box. After the external sand box is combined, a screw is used to clamp on the connecting groove 12, and the screw is tightened to fix the sand box and the external sand box. This sand box and the external sand box are used in combination.

[0033] When the sand box is transported, a crane or a hoist is used to fasten the sand box to the lifting column 10 through a lifting belt for transportation. In order to strengthen the structural strength of the lifting column 10 and prevent the lifting column 10 from breaking during the transportation of the sand box, a reinforcing block 9 is provided between the lifting column 10 and the box body 1, thereby strengthening the connection strength between the lifting column and the box body 1.

[0034] Preferably, an annular boss 13 for combining with other sand boxes is provided on the top of the box body 1.

[0035] In this embodiment, the annular boss 13 mainly functions as a positioning device. When connected and merged with an external sand box, the bottom of the external sand box engages with the annular boss 13. The staff does not need to perform multiple controls and tests to determine whether the sand box and the external sand box are fully fitted. As long as the engagement is successful, the sand box and the external sand box will be fully fitted.

[0036] Preferably, the annular boss 13 is in a quadrilateral shape; and buffer blocks 14 are provided at the corners of the annular boss 13 .

[0037] In this embodiment, buffer blocks 14 are provided at the corners of the annular boss 13 to reduce the impact force on the sand box when placing an external sand box and prevent the air-permeable sand from falling off the sand box.

[0038] Preferably, ventilation holes 15 are provided on the side surfaces of the partition plate 2 and the cooling boss 5 .

[0039] In this embodiment, the partition 2 is provided with vent holes 15 to make the temperature of the entire box 1 roughly equal, preventing uneven heat dissipation of the sand box from causing degradation of casting performance. The cooling boss 5 is provided with vent holes 15, so that the gas in the mold can be better discharged during the casting process, avoiding the incomplete discharge of the gas in the casting, resulting in pores in the casting. Secondly, the vent holes 15 can accelerate the cooling of the casting and ensure the quality of the casting.

[0040] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.

Claims

1. A sand box, characterized in that: It comprises a box body; the box body is provided with a plurality of partitions; the plurality of partitions divide the box body into a plurality of accommodating spaces for accommodating breathable sand; a cooling plate is provided on the top of the box body; a cooling boss is provided on the surface of the cooling plate; a first sand hanging strip and a sand hanging groove are provided on the surface of the cooling boss; a second sand hanging strip is provided on the inner side around the box body.

2. The flask according to claim 1, characterized in that: The sand hanging bars and the sand hanging grooves are arranged at intervals on the surface of the cooling boss.

3. The flask according to claim 1, characterized in that: The cooling plate is in a cross shape; the cooling boss is in a cross shape.

4. The flask according to claim 1, characterized in that: The box body is provided with a reinforcement block; the reinforcement block is provided with a lifting column; the side surface of the box body is provided with a plurality of reinforcement ribs; the upper surface of the box body is provided with a plurality of connection grooves.

5. The flask according to claim 1, characterized in that: An annular boss is arranged on the top of the box body.

6. The flask according to claim 5, characterized in that: The annular boss is in the shape of a quadrilateral; and buffer blocks are arranged at the corners of the annular boss.

7. The flask according to claim 1, characterized in that: The side surface of the partition and the cooling boss are both provided with ventilation holes.

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