Pit for casting

Abstract

The utility model discloses a pit for casting, which is mainly applied to the technical field of casting and comprises a pit and a movable plate, the pit is poured by concrete, grooves are uniformly distributed at the bottom of the pit, exhaust pipes are arranged on the inner wall of the pit in the length direction, the exhaust pipes are aligned with the grooves, and vent holes are formed in the inner wall of the pit in the length direction. The vent hole is communicated with the exhaust pipe, and a clamping groove is formed in the inner wall of the pit in the length direction and used for fixing the movable plate. By applying the pit for casting, the exhaust of a sand mold is smoother, the exhaust burden of the sand mold and a sand core is reduced, the surface quality of a casting is obviously improved, the pit is convenient and flexible to use, the pit can be divided into a plurality of independent casting areas, the casting efficiency is effectively improved, and the production cost of an enterprise is reduced.

Description

Technical Field

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

[0002] The pit for casting, also known as pit molding, is a specific molding method in casting production. This molding method is very suitable when the number of castings is small and there is no suitable sand box, especially when large castings are produced in single pieces. The use of pit molding can save the man-hours and costs of casting large sand boxes and shorten the production cycle of large castings. In addition, making the sand mold in the pit can also reduce the height of the top surface of the mold from the ground, making it safe and convenient for pouring. Pit molding mainly relies on manual operation, so it requires a very high technical level of employees. Although the production efficiency is relatively low and the labor intensity is high, due to its flexibility and simplicity of process equipment, the production preparation time is short, and it has strong adaptability and can be used to cast castings of various sizes and shapes.

[0003] Application No.: 2021223877329 discloses a pit structure suitable for large casting pit modeling, including a pit set on the ground, the bottom surface of the pit is inclined, and a lower concave portion is arranged at the lower end of the inclined bottom surface, a pump body is arranged in the lower concave portion, a pipe body leading to the outside of the pit is connected to the pump body, and steel sand is also laid at the bottom of the pit. The pit structure is compact, which is convenient for draining water generated during the casting of large castings, while ensuring safe production.

[0004] Although the above technical solution solves the drainage problem, the following problems still exist: 1. The pit is not ventilated smoothly, affecting the quality of castings; 2. It is not flexible enough to use, and the pit use area cannot be adjusted according to the size of the casting, reducing work efficiency. Utility Model Content

[0005] The utility model provides a pit for casting, which solves the problems of poor ventilation and low use efficiency of the pit.

[0006] The technical solution of the utility model is: a casting pit, comprising a pit and a movable plate, the pit is cast with concrete, grooves are evenly distributed on the bottom of the pit, an exhaust pipe is arranged on the inner wall in the length direction, the exhaust pipe is aligned with the groove, a vent is opened on the inner wall in the length direction of the pit, the vent is connected with the exhaust pipe, a card slot is opened on the inner wall in the length direction of the pit, and the card slot is used to fix the movable plate.

[0007] Preferably, the movable plate is made of steel plate, reinforcing ribs are evenly distributed on the back side, and there are through holes from the top to the bottom of the movable plate.

[0008] Preferably, the exhaust pipe is made of galvanized steel pipe.

[0009] Preferably, the exhaust pipe spacing is 750 mm.

[0010] Preferably, the pit is 10000 mm long, 4000 mm wide and 1500 mm deep.

[0011] Preferably, the diameter of the vent hole is 60 mm.

[0012] Principle of the utility model: In order to solve the problem of pit exhaust, the utility model makes improvements on the basis of the existing pit, a groove is arranged at the bottom of the pit, and vents and exhaust pipes are arranged on the inner wall, the groove is aligned with the exhaust pipe, and when the molten iron pouring operation is carried out, the gas and water vapor generated after the sand mold is heated enter the exhaust pipe through the groove and the vent, and the gas and water vapor are continuously discharged outward, which on the one hand reduces the exhaust burden of the sand mold and the sand core, and on the other hand can reduce the generation of invasive pores in the casting, reduce defects such as pores in the casting, and improve the surface quality of the casting; In order to solve the problem that the use of the pit is not flexible enough, the use area of ​​the pit cannot be adjusted according to the size of the casting, and the operating efficiency is low, the utility model opens a card slot on the inner wall of the pit for fixing the movable plate, when the casting is small or multiple castings are cast together, multiple movable plates can be used to divide multiple casting areas, each casting area can be used individually or simultaneously, effectively improving the casting efficiency, and flexible and changeable use.

[0013] The beneficial effects of the utility model are as follows: a casting pit can make the exhaust of sand molds smoother, reduce the exhaust burden of sand molds and sand cores, significantly improve the surface quality of castings, is convenient and flexible to use, can be divided into multiple independent casting areas, effectively improves casting efficiency, and reduces enterprise production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model;

[0016] In the figure, 101 is a pit, 102 is an exhaust pipe, 103 is a vent, 104 is a groove, 105 is a slot, and 106 is a movable plate. DETAILED DESCRIPTION

[0017] The specific implementation of the utility model is as follows: Figure 1 , Figure 2As shown, a casting pit includes a pit 101 and a movable plate 106. The pit 101 is cast with concrete. Grooves 104 are evenly distributed on the bottom of the pit 101. An exhaust pipe 102 is arranged on the inner wall in the length direction. The exhaust pipe 102 is aligned with the groove 104. Vent holes 103 are opened on the inner wall in the length direction of the pit 101. The vent holes 103 are connected to the exhaust pipe 102. A slot 105 is opened on the inner wall in the length direction of the pit 101. The slot 105 is used to fix the movable plate 106.

[0018] Specific as Figure 1 , Figure 2 As shown, the movable plate 106 is made of steel plate, and reinforcement ribs are evenly distributed on the back. There are through holes from the top to the bottom of the movable plate 106. In this embodiment, the movable plate 106 is made of steel plate, and reinforcement ribs are welded on the back to improve the bending resistance of the movable plate 106. It is not easy to deform during use. It is inserted into the card slot 105, and a fixing pin is inserted into the through hole to prevent the movable plate 106 from shifting during use and affecting the quality of the casting.

[0019] Specifically, the exhaust pipe 102 is made of a galvanized steel pipe, which has good corrosion resistance, long service life and low production cost.

[0020] Specifically, the exhaust pipes 102 are spaced 750 mm apart. In this embodiment, the exhaust pipes 102 with a spacing of 750 mm have the highest efficiency in exhausting gas and water vapor.

[0021] Specifically, the pit 101 is 10000 mm long, 4000 mm wide and 1500 mm deep. In this embodiment, the pit 101 of the above size is highly adaptable, and the production of large castings is not restricted by tooling, and can be used to cast large lathe bodies, and can also be divided into multiple casting areas separately, and multiple castings can be manufactured, and the use methods are flexible and diverse.

[0022] Specifically, the diameter of the vent hole 103 is 60 mm. In this embodiment, the vent hole 103 with a diameter of 60 mm has a better exhaust efficiency.

[0023] 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 for explaining the principle of 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 casting pit, characterized in that: The invention comprises a pit (101) and a movable plate (106). The pit (101) is cast with concrete. Grooves (104) are evenly distributed on the bottom of the pit (101). An exhaust pipe (102) is provided on the inner wall in the length direction. The exhaust pipe (102) is aligned with the groove (104). A vent hole (103) is provided on the inner wall in the length direction of the pit (101). The vent hole (103) is connected to the exhaust pipe (102). A clamping groove (105) is provided on the inner wall in the length direction of the pit (101). The clamping groove (105) is used to fix the movable plate (106).

2. A casting pit according to claim 1, characterized in that: The movable plate (106) is made of a steel plate, with reinforcing ribs evenly distributed on the back, and through holes are provided from the top to the bottom of the movable plate (106).

3. A casting pit according to claim 1, characterized in that: The exhaust pipe (102) is made of a galvanized steel pipe.

4. A casting pit according to claim 1, characterized in that: The exhaust pipes (102) are spaced 750 mm apart.

5. A casting pit according to claim 1, characterized in that: The pit (101) has a length of 10000 mm, a width of 4000 mm and a depth of 1500 mm.

6. A casting pit according to claim 1, characterized in that: The diameter of the ventilation hole (103) is 60 mm.

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