Combined variable casting sand box

Abstract

The utility model discloses a combined variable casting sand box which is characterized in that a conventional square sand box is divided into an upper groove box body and a lower groove box body along the diagonal line of the square sand box; a plurality of upper half grooves are formed in the box body at the diagonal decomposition positions of the two sides of the upper groove box body, and a plurality of lower half grooves are formed in the box body at the diagonal decomposition positions of the two sides of the lower groove box body; through the upper half groove in the upper groove box body and the lower half groove in the lower groove box body, the upper half groove and the lower half groove of the two diagonal box bodies are connected in an inserted mode, sand boxes of different sizes are formed to adjust the size of the sand boxes, and then the two box bodies are connected through angle steel. According to the utility model, the requirement that castings with different specifications use different sand boxes can be met, and compared with the situation that the castings with different specifications use a plurality of sand boxes or use a large sand box to cast small castings, the molding sand is obviously saved, the inventory space of a lot of sand boxes is reduced, the quality of the castings is ensured, and the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing sand boxes for casting, in particular to a combined variable casting sand box which can be adapted to castings of different sizes at the same time. Background Art

[0002] The sand box plays a vital role in the casting process. Its main function is to put the molding sand into the sand box to form a casting mold of the required shape, and then produce the required casting products through casting.

[0003] Currently, flasks are typically monolithic structures, mostly square or rectangular. However, each flask size is designed for a specific casting size range, and using it beyond its intended size range can easily lead to adverse consequences. Using a large flask for a small casting not only wastes sand, but also reduces the solidification rate of the casting due to the thickness of the sand, thereby affecting the casting quality. This is especially true for castings with a wide variety of specifications and types, large variations in individual piece weights, and small batch sizes of the same specification, requiring a wide variety of flask sizes. However, manufacturing a large number of flasks not only consumes significant capital, but also wastes some flask sizes due to infrequent use, and requires extensive storage space. Utility Model Content

[0004] Based on the problems and shortcomings existing in the manufacturing and use of the above-mentioned sand box, the utility model proposes a new technical solution for improving the sand box structure. The utility model designs a combined variable sand box, including a square sand box, characterized in that the square sand box is decomposed into an upper trough box body and a lower trough box body along its diagonal line; a plurality of upper half troughs are provided on the box body at the diagonal decomposition points on both sides of the upper trough box body, and a plurality of lower half troughs are provided on the box body at the diagonal decomposition points on both sides of the lower trough box body. Through the upper half troughs on the upper trough box body and the lower half troughs on the lower trough box body, the upper and lower half troughs at different positions on the two diagonal boxes are plugged into each other to form sand boxes of different sizes, and then the two boxes are fixedly connected by angle steel.

[0005] The utility model is also characterized in that a plurality of mounting holes are provided on both sides of the upper half of the upper trough box body; a plurality of mounting holes are provided on both sides of the lower half of the lower trough box body; mounting holes corresponding to the mounting holes on the upper trough box body and the lower trough box body are provided on both sides of the angle steel; the upper trough box body, the lower trough box body and the angle steel are connected and fixed by bolts and nuts.

[0006] A further feature of the present invention is that the length of the upper and lower troughs is half the height of the flask, and the width is the thickness of the flask frame. The size of the two flask bodies and the number of upper and lower troughs can be adjusted based on the specifications or size of the castings. The upper and lower trough bodies of the present invention are also interchangeable.

[0007] Through multiple trials, this utility model utilizes a more rational sandbox structure to design a modular variable sandbox. This allows for different sandbox sizes to accommodate a wide range of casting sizes. This utility model decomposes a commonly used square sandbox along its diagonal into two movable boxes with slots. These two diagonal boxes can be connected to form sandboxes of different sizes, allowing for adjustment of the sandbox size and making the use and operation of the sandbox more convenient. For frequent production of small batches of castings of varying sizes, this significantly reduces sandbox manufacturing and production costs, while also reducing the total sandbox inventory and storage area. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0009] Figure 2 This is a schematic cross-sectional view of the combined structure of the large-size casting sand box of the utility model;

[0010] Figure 3 It is a schematic cross-sectional view of the combined structure of a small-area casting sand box of the utility model.

[0011] The serial numbers represent: upper trough box 1, lower trough box 2, angle steel 3, upper half trough 4, lower half trough 5. DETAILED DESCRIPTION

[0012] The following reference Figure 1-3 In order to clearly illustrate the present invention, the structural dimensions and area ranges in the drawings may be enlarged or exaggerated, or some graphic structures may not be shown when the text description is clear, but the sizes of these preferred embodiments and structures do not limit the present invention.

[0013] The utility model is based on the problems existing in the manufacturing and use of sand boxes, such as many casting specifications and varieties, large differences in the weight of single pieces, small batches of the same specifications and varieties, and the need to prepare sand boxes of many specifications and varieties; and some specifications and varieties of sand boxes are used infrequently, but still require a large area of warehouse for storage, resulting in waste of funds and factory buildings. After many trials, a combined variable sand box technical solution is designed to solve the problems and shortcomings existing in the manufacturing and use of the above-mentioned multi-specification sand boxes.

[0014] Reference Figures 1 to 3 The present invention first decomposes an existing square flask along its diagonal into an upper flask body 1 and a lower flask body 2. An upper half flask 4 is formed at a certain position indented at a right angle from both ends of the diagonal decomposition on the upper flask body 1. A lower half flask 5 is formed on the lower flask body 2 at a position opposite to the upper flask body 1. When in use, the upper and lower flask bodies 1 and 2 are connected to form a complete flask using angle steel 3. A plurality of mounting holes are machined on the angle steel 3 and at corresponding positions on the ends of the upper and lower flask bodies 1 and 2, as well as on the upper half flask 4 and lower half flask 5. By connecting the end faces of the upper and lower flask bodies 1 and 2, or by interlocking the upper half flask 4 on the upper flask body 1 and the lower half flask 5 on the lower flask body 2, the upper and lower halves of the two diagonally opposite flask bodies are inserted into each other at corresponding positions according to the size of the casting, thereby forming flasks of different sizes and completing the adjustment of the flask size. The two flask bodies are then connected and fixed using the angle steel 3 and bolts and nuts to form square flasks of different sizes.

[0015] like Figure 2 As shown in the schematic diagram of the combined structure cross-section of the large-size casting sand box, the utility model is provided with a plurality of mounting holes on both sides of the upper half trough 4 of the upper trough box body 1 and on both sides of the lower half trough 5 of the lower trough box body 2, and mounting holes corresponding to the mounting holes on the upper trough box body 1 and the lower trough box body 2 are also processed on both sides of the connecting angle steel 3; during installation, the box body is adjusted to the maximum installation position according to the size specifications of the casting so that the size of the sand box meets the actual needs of large-area castings, and then the angle steel 3 and bolts and nuts are used to connect and fix the upper trough box body 1 and the lower trough box body 2 to form a large-size square sand box.

[0016] like Figure 3 As shown in the cross-sectional diagram of the combined structure of the sand box for small-area castings, the size adjustment is the same as that of the sand box for large-area castings. The mounting holes on the upper trough box body 1 and the lower trough box body 2 are adjusted to the minimum area of the sand box to meet the actual needs of small-size castings. Then, the upper trough box body 1 and the lower trough box body 2 are connected with angle steel 3 and bolts and nuts to form a small-area square sand box.

[0017] The upper half groove 4 and the lower half groove 5 processed on the upper groove box body 1 and the lower groove box body 2 of the utility model have a groove length of 1 / 2 of the sand box height, and the groove width is the same as the thickness of the sand box frame, so that the two boxes are connected smoothly and tightly after the plug-in is completed.

[0018] The size of the two flask bodies, as well as the number of upper and lower troughs, can be adjusted based on the casting size and specifications. The upper and lower troughs 4 and 5 can be positioned along the length of the flask bodies, depending on the casting size. The upper and lower trough bodies 1 and 2 of the present invention have identical housing and slot dimensions, allowing them to be interchanged vertically.

[0019] The new sand box designed in this utility model has a more reasonable structure, a wider range of applications, and is very easy to operate. It can meet the needs of castings of different specifications, save manufacturing and production costs, and reduce the storage volume and storage area of the sand box.

[0020] Example 1

[0021] Reference Figure 2 This embodiment designs and manufactures a large-scale sand box for tension reducing rollers for hot-rolled seamless steel pipes. The maximum outer diameter of the large-scale blank of the casting is Φ398mm, the inner hole is Φ76mm, and the height is 170mm. This embodiment adopts Figure 2 The large-size sand box combination method is used to prepare sand boxes with an area of 610×610mm.

[0022] Design the sandbox: Split the square box diagonally into two diagonal sections. The section components are constructed from 610mm-long, 170mm-high, and 8mm-thick steel plates. Two half-slots are machined into each of the upper and lower sections (1 and 2). The distance between the half-slots and the diagonal end faces of the sections is at least the width of one side of the angle steel. The length of both the upper and lower sections (4 and 5) is half the height of the sandbox, meaning 85mm long and 8mm wide. Connectors are fabricated from 170mm-long angle steel. Two 10mm-diameter bolt holes are machined into the corresponding locations on each side of the upper and lower half-slots of the two diagonal sections, as well as on both sides of the angle steel. M8×30 bolts and nuts are used to secure the angle steel to the two diagonal sections.

[0023] In this example, a batch of 30 large-scale flasks was manufactured and used to cast two types of tension roller blanks. Six large-scale tension roller blanks were cast. The castings produced using the large-scale modular flasks in this example met the same quality standards as those produced using existing, integrated square flasks and all passed inspection.

[0024] Example 2

[0025] Reference Figure 3 In this embodiment, a tension reducing roller flask is used to manufacture small-sized hot-rolled seamless steel pipes. The maximum outer diameter of the small-sized blank is Φ254mm, the inner hole is Φ76mm, and the height is 170mm. The casting flask area is 465×465mm.

[0026] The square box is split into two diagonal boxes along the diagonal line; the side length of the box assembly is 465, the height is 170mm, and the thickness of the steel plate is 7mm. Two half-grooves are machined on each of the upper trough box 1 and the lower trough box 2. The distance between the half-grooves and the diagonal end face of the box is at least the width of one side of the angle steel. The length of the upper half-groove 4 and the lower half-groove 5 are both 85mm, the groove width is 7mm, and the length of the angle steel is 170mm. Two Φ8mm bolt holes are machined on each side at the corresponding positions on both sides of the upper and lower half-grooves of the two diagonal boxes and on the two sides of the angle steel, and M6×30 bolts and nuts are used to connect and fix the angle steel and the two diagonal boxes. The sand box of this embodiment casts 9 small-sized tension reducing roller blanks. After inspection, the casting products have the same casting quality as the existing integral square sand box and are all qualified.

[0027] This utility model can meet the needs of using different flasks for castings of different specifications. Compared with using multiple flasks for castings of different specifications or using a large flask for casting small castings, it significantly saves molding sand while ensuring the quality of the castings. It also reduces the inventory space of the flasks and greatly reduces production costs.

[0028] The present invention is not limited to the above embodiments. Those skilled in the art may make various improvements or modifications to the present invention without departing from the design concept of the present invention. These changes and modifications should fall within the scope of protection of the present invention.

Claims

1. A combined variable casting sand box, including a square sand box, characterized in that: The square sand box is decomposed into an upper trough box body and a lower trough box body along its diagonal line; a plurality of upper half troughs are provided on the box body at the diagonal decomposition points on both sides of the upper trough box body, and a plurality of lower half troughs are provided on the box body at the diagonal decomposition points on both sides of the lower trough box body. Through the upper half troughs on the upper trough box body and the lower half troughs on the lower trough box body, the upper and lower half troughs at different positions on the two diagonal boxes are plugged into each other to form sand boxes of different sizes, and then the two boxes are fixedly connected by angle steel.

2. The variable casting flask according to claim 1, characterized in that: Several mounting holes are provided on both sides of the upper half of the upper tank box; several mounting holes are provided on both sides of the lower half of the lower tank box; mounting holes corresponding to the mounting holes on the upper tank box and the lower tank box are provided on both sides of the angle steel.

3. The variable casting flask according to claim 2, characterized in that: The upper trough box body, the lower trough box body and the angle steel are connected and fixed by bolts and nuts.

4. The variable casting flask according to claim 2, characterized in that: The length of the upper half groove and the lower half groove is 1 / 2 of the height of the sand box, and the width of the groove is the thickness of the sand box frame.

5. The variable casting flask according to claim 4, characterized in that: The sizes of the two sand box bodies and the number of the upper half trough and the lower half trough are set according to the specifications or sizes of the castings, and the box body sizes are adjusted in series.

6. The variable casting flask according to claim 3, characterized in that: The upper tank box body and the lower tank box body can also be interchanged up and down.

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