A sand-saving sand box

Abstract

This utility model provides a sand-saving box, belonging to the field of casting device technology, comprising: a multi-layer box body, each box body having a molding sand cavity; a sand-saving section protruding from the inner wall of the molding sand cavity, with a sand-saving cavity within the sand-saving section; the sand-saving cavity on the bottom box body is connected to the molding sand cavity, while the other molding sand cavities are separated from the sand-saving cavity; a sand-hanging section is provided on the inner wall of the molding sand cavity, which is used to connect with the sand mold inside the molding sand cavity; the advantage is that the sand-saving section with sand-saving cavity is provided on the inner wall of the molding sand cavity of each layer of the box body, which effectively reduces the filling volume of resin sand, thereby significantly reducing the amount of resin sand used and saving material costs. The design of the molding sand cavity and the sand-saving cavity of the bottom box body not only helps to evenly distribute the filling material (sand) to the bottom box, enhancing the overall strength of the bottom box body, but also ensures that the necessary structural support is maintained while reducing the amount of resin sand used.

Description

Technical Field

[0001] This utility model belongs to the field of casting equipment technology and relates to a sand-saving sand box. Background Technology

[0002] In modern casting production, resin sand molding is widely used in manufacturing castings with complex structures and high surface quality requirements due to its excellent fluidity, hardening properties, and dimensional accuracy. Especially in manual or semi-automatic molding lines, resin sand, with its superior formability, has become one of the important molding materials for high-value-added castings.

[0003] However, in practical applications, traditional resin sand molding processes typically involve completely filling the sand mold. To ensure the strength and stability of the sand mold, a relatively thick mold wall structure is often required. While this design meets basic casting requirements, it also leads to a significant consumption of resin sand. Due to the high prices of resin and quartz sand, the material cost per unit increases substantially. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a sand-saving sand box.

[0005] The objective of this utility model can be achieved through the following technical solution: a sand-saving sand box, comprising:

[0006] The multi-layer box body is provided with a molding sand cavity in each box body. A sand-saving part is provided on the inner wall of the molding sand cavity. A sand-saving cavity is provided in the sand-saving part. The sand-saving cavity on the bottom box body is connected to the molding sand cavity, while the other molding sand cavities are separated from the sand-saving cavity.

[0007] The inner wall of the molding sand cavity is provided with a sand hanging part, which is used to connect with the sand mold inside the molding sand cavity.

[0008] In the aforementioned sand-saving box, a reinforcing plate is fixedly installed inside the sand-saving cavity and is perpendicular to the inner wall of the sand-saving cavity.

[0009] In the aforementioned sand-saving sand box, the inner wall of the molding sand cavity extends and deforms to form a test block groove.

[0010] In the aforementioned sand-saving sand box, reinforcing ribs are raised on the outer surface of the box body, and the reinforcing ribs are arranged perpendicular to the outer surface.

[0011] In the aforementioned sand-saving sand box, the sand-hanging part includes a fixing rod, the fixing rod includes a fixing surface, the fixing surface is fixed to the inner cavity surface of the molding sand cavity, and two connecting rods are integrally provided on both sides of the fixing rod. The axes of the two connecting rods are arranged parallel to the axis of the fixing rod, and the two connecting rods are symmetrically arranged along the axis of the fixing rod.

[0012] In the aforementioned sand-saving sand box, the fixing rod and the connecting rod are cylindrical rods.

[0013] In the aforementioned sand-saving box, a through-hole is provided on the inner wall of the sand-saving section.

[0014] In the aforementioned sand-saving sand box, multiple venting strips arranged in a crisscross pattern are fixedly installed at the upper end of the topmost box to form venting holes.

[0015] In one of the aforementioned sand-saving boxes, a calibration lever is provided on a portion of the box body.

[0016] In the aforementioned sand-saving box, a connecting part is provided on the box body, and the calibration lever is detachably connected to the connecting part.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) A sand-saving section with a sand-saving cavity is set on the inner wall of the molding sand cavity of each layer of the box, which effectively reduces the filling volume of resin sand, thereby significantly reducing the amount of resin sand used and saving material costs. The design of the molding sand cavity and the sand-saving cavity of the bottom box not only helps the filling material (sand) to be evenly distributed to the bottom box and enhances the overall strength of the bottom box, but also ensures that the necessary structural support is maintained while reducing the amount of resin sand used;

[0019] (2) In addition, the raised sand-saving section increases the contact area between the molding sand and the inner wall of the sand box, thereby greatly enhancing the connection strength between the two and effectively preventing sand from falling off during flipping or handling. At the same time, the design of the sand-hanging section further strengthens the bonding between the sand mold and the molding sand cavity, improving the safety and reliability of the entire molding process. Attached Figure Description

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure;

[0022] Figure 3 This is the second three-dimensional structural schematic diagram of this utility model;

[0023] Figure 4 yes Figure 3 A magnified schematic diagram of the local structure at point A;

[0024] Figure 5 yes Figure 2 A partial cross-sectional structural diagram.

[0025] In the figure, 100 is the box body; 101 is the molding sand cavity; 102 is the sand-saving section; 103 is the sand-saving cavity; 104 is the reinforcing plate; 105 is the test block groove; 106 is the reinforcing rib plate; 107 is the slot; 108 is the vent hole; 109 is the connecting part; 200 is the sand hanging part; 201 is the fixing rod; and 202 is the connecting rod. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] like Figures 1-5 As shown, a sand-saving sand box includes:

[0029] The multi-layer box 100 has a sand cavity 101 inside each box 100. A sand-saving part 102 is protruding from the inner wall of the sand cavity 101. A sand-saving cavity 103 is provided inside the sand-saving part 102. The sand-saving cavity 103 on the bottom box 100 is connected to the sand cavity 101, while the other sand cavities 101 are separated from the sand-saving cavity 103.

[0030] A sand hanging part 200 is provided on the inner wall of the molding sand cavity 101. The sand hanging part 200 is used to connect with the sand mold inside the molding sand cavity 101.

[0031] In this embodiment, a sand-saving section 102 with a sand-saving cavity 103 is provided on the inner wall of the molding sand cavity 101 of each layer box 100, which effectively reduces the filling volume of resin sand, thereby significantly reducing the amount of resin sand used and saving material costs. The design that the molding sand cavity 101 and the sand-saving cavity 103 of the bottom box 100 are connected not only helps the filling material (sand) to be evenly distributed to the bottom box and enhances the overall strength of the bottom box 100, but also ensures that the necessary structural support is maintained while reducing the amount of resin sand used.

[0032] Furthermore, the raised sand-saving section 102 increases the contact area between the molding sand and the inner wall of the sand box, thereby greatly enhancing the connection strength between the two and effectively preventing sand from falling off during flipping or handling. At the same time, the design of the sand-hanging section 200 further strengthens the bonding between the sand mold and the molding sand cavity 101, improving the safety and reliability of the entire molding process.

[0033] In a further preferred embodiment, a reinforcing plate 104 is fixedly installed inside the sand-saving cavity 103, perpendicular to the inner wall of the sand-saving cavity 103. The reinforcing plate 104, vertically installed inside the sand-saving cavity 103, can significantly improve the mechanical strength of the sand-saving cavity 103 and the housing 100 it is located in. This design helps to resist external pressure and internal stress, especially during the filling of molding sand and subsequent processing, preventing deformation or damage to the housing 100.

[0034] Preferably, the inner wall of the molding sand cavity 101 extends and deforms inward and outward to form a test block groove 105. The test block groove 105 extends outward and does not occupy the internal space of the molding sand cavity 101, thus ensuring the shape integrity and dimensional accuracy of the casting cavity and avoiding the influence of the internal test block structure on the casting molding. Depending on different needs, the test block groove 105 can be flexibly designed into different shapes and sizes to adapt to various types of testing requirements. Furthermore, it can be configured in different positions within the sand box to facilitate obtaining the most representative samples.

[0035] Preferably, reinforcing ribs 106 are raised on the outer surface of the housing 100, and the reinforcing ribs 106 are perpendicular to the outer surface. The design of the test block slot 105 does not extend beyond the outer boundary of the reinforcing ribs 106, which means that it will not occupy additional space or increase the overall size of the sand box. This satisfies sampling requirements while maintaining a compact equipment layout, making it ideal for operating environments with limited space. The presence of the reinforcing ribs 106 not only provides necessary structural support to prevent deformation or damage to the housing 100 during use, but also provides additional protection and support for the test block slot 105, enhancing the durability and reliability of the entire sand box.

[0036] Specifically, the sand-hanging part 200 includes a fixing rod 201, which includes a fixing surface that is fixed to the inner cavity surface of the molding sand cavity 101. Two connecting rods 202 are integrally provided on both sides of the fixing rod 201. The axes of the two connecting rods 202 are parallel to the axis of the fixing rod 201, and the two connecting rods 202 are symmetrically arranged along the axis of the fixing rod 201.

[0037] In this embodiment, the fixing rod 201 is firmly connected to the inner cavity surface of the molding sand cavity 101 through its fixing surface, providing a stable base point. The two symmetrically arranged connecting rods 202 further increase the contact area between the molding sand and the inner wall of the molding sand cavity 101, thereby significantly improving the overall connection strength. Moreover, the connecting rods 202 extend symmetrically from both sides of the fixing rod 201, forming an "inverted" structure with the fixing rod 201. The two connecting rods 202 are symmetrically arranged along the axis of the fixing rod 201, and their axes are parallel to the fixing rod 201. This layout helps to evenly distribute the force and prevent the sand mold from shifting or falling off during flipping or handling.

[0038] Further specifying, the fixing rod 201 and connecting rod 202 are cylindrical rods. The cylindrical shape of the fixing rod 201 and connecting rod 202 provides a uniform stress distribution, reducing the risk of breakage due to stress concentration. Compared to other shapes (such as square or rectangular), the circular cross-section has better bending and torsional resistance, making the entire sand-coating section 200 structure more robust and durable. The contact between the cylindrical connecting rod 202 and the molding sand is a multi-point line contact, which, compared to surface contact, allows for better embedding into the molding sand, forming a more stable mechanical engagement. In particular, the inverted connecting rod 202 can penetrate deep into the molding sand, significantly increasing the adhesion strength of the molding sand and preventing detachment.

[0039] Preferably, the inner wall of the sand-saving section 102 is provided with a through-hole 107. During the filling of resin sand or the pouring of molten metal, a large amount of gas is generated inside the mold cavity. If it cannot be discharged in time, it can easily cause casting defects such as porosity, shrinkage porosity, and incomplete filling. By opening a through-hole 107 on the inner wall of the sand-saving section 102, a fast exhaust channel can be provided for the gas, significantly improving the venting effect and enhancing the quality of the casting.

[0040] Preferably, multiple venting strips arranged in a crisscross pattern are fixedly installed at the upper end of the uppermost box 100 to form venting holes 108. By setting the venting strips in a crisscross pattern at the upper end of the uppermost box 100, multiple evenly distributed small venting holes 108 are formed. These venting holes 108 can effectively discharge the gas in the mold cavity during the casting process, avoiding defects such as porosity and slag inclusions caused by gas retention, thereby significantly improving the quality of the casting.

[0041] Preferably, multiple calibration levers are spaced apart on the outer wall of some of the housings 100. This structure allows for fine-tuning of the relative positions between housings 100 during mold closing by operators manually pulling the calibration levers, thereby improving mold closing accuracy and assembly stability. It is particularly suitable for processes such as resin sand molding where high mold closing accuracy is required, helping to reduce casting defects caused by misaligned housings and increasing yield.

[0042] More preferably, a connecting part 109 is provided on the outer wall of the housing 100, and the calibration handle is detachably connected to the connecting part 109. This detachable connection not only facilitates the installation and replacement of handles of different lengths or angles to meet the needs of castings of different specifications, but also makes it convenient to remove the handle after mold closing, avoiding interference with subsequent pouring and cleaning operations. At the same time, the setting of the connecting part 109 enhances the connection strength between the handle and the housing 100, improving the reliability and safety of the overall structure.

[0043] The connecting part 109 is provided with a threaded hole, and the first end of the calibration lever is provided with an external thread that is threaded to the connecting part 109. The second end of the calibration lever is provided with an operating part (knob, handle, or polygonal prism structure) to facilitate the operator to grip and apply force to rotate or pull. This improves the ease of use of the lever.

[0044] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A sand-saving sand box, characterized in that, include: The multi-layer box body is provided with a molding sand cavity in each box body. A sand-saving part is provided on the inner wall of the molding sand cavity. A sand-saving cavity is provided in the sand-saving part. The sand-saving cavity on the bottom box body is connected to the molding sand cavity, while the other molding sand cavities are separated from the sand-saving cavity. The inner wall of the molding sand cavity is provided with a sand hanging part, which is used to connect with the sand mold inside the molding sand cavity.

2. The sand-saving sand box according to claim 1, characterized in that, A reinforcing plate is fixedly installed inside the sand-saving cavity and is perpendicular to the inner wall of the sand-saving cavity.

3. The sand-saving sand box according to claim 1, characterized in that, The inner wall of the molding sand cavity extends and deforms to form a test block groove.

4. A sand-saving sand box according to claim 1, characterized in that, The outer surface of the box is provided with reinforcing ribs that are raised and perpendicular to the outer surface.

5. A sand-saving sand box according to claim 1, characterized in that, The sand-hanging part includes a fixing rod, the fixing rod includes a fixing surface, the fixing surface is fixed to the inner cavity surface of the molding sand cavity, and two connecting rods are integrally provided on both sides of the fixing rod. The axes of the two connecting rods are parallel to the axis of the fixing rod, and the two connecting rods are symmetrically arranged along the axis of the fixing rod.

6. A sand-saving sand box according to claim 5, characterized in that, The fixing rod and the connecting rod are cylindrical rods.

7. A sand-saving sand box according to claim 1, characterized in that, The inner wall of the sand-saving section is provided with through-holes.

8. A sand-saving sand box according to claim 1, characterized in that, The upper part of the topmost box is fixed with multiple vent strips arranged in a cross pattern to form vent holes.

9. A sand-saving sand box according to claim 1, characterized in that, Some of the boxes are equipped with calibration levers.

10. A sand-saving sand box according to claim 9, characterized in that, The housing is provided with a connecting part, and the calibration lever is detachably connected to the connecting part.

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