Box clamping-pressing iron linkage anti-expansion box device for resin sand molding

Abstract

The utility model discloses a box card -iron compression linkage anti -expansion box device for resin sand molding, including upper sand box, lower sand box, iron compression, its characterized in that, the upper sand box is locked with adjustable box card when the upper sand box and lower sand box are closed, the upper sand box upper end face sets up elastic buffer structure, and the elastic buffer structure upper end sets up iron compression, the elastic buffer structure includes the upper pressure -resistant insulating layer, rubber buffer layer, lower pressure -resistant heat -insulating layer that set up in proper order, the upper pressure -resistant insulating layer is contacted with iron compression, and the lower pressure -resistant heat -insulating layer is contacted with the upper sand box, the utility model discloses the coordination of box card and iron compression and is restricted, realizes sand box multidirectional fixation (perpendicular, horizontal), solves the problem of expansion box, improves the quality stability of casting, the utility model discloses elastic buffer structure avoids the adhesion of upper sand box and iron compression, makes the device easy to dismount.

Description

Technical Field

[0001] This utility model relates to the field of casting technology, specifically to a box-and-pressor linkage anti-expansion box device for resin sand molding. Background Technology

[0002] In the resin sand molding process of the foundry industry, the sand box is a crucial carrier for the resin sand mold. During pouring, the high-temperature molten metal (such as molten iron or steel) is injected into the sand mold, generating severe thermal shock and hydrostatic pressure. Simultaneously, the resin sand may undergo slight expansion at high temperatures (linear expansion rate approximately 0.5%-1.2%). If the sand box is not securely fixed, it may deform (commonly known as "box expansion"), resulting in dimensional deviations in the casting, flash, burrs, or even scrap, severely impacting the casting quality.

[0003] Currently, the commonly used methods for preventing sand box expansion in the industry mainly rely on a single pressure iron (such as a cast iron block) directly pressing down on the top of the sand box, or fixing the sides of the sand box with simple box clips (such as U-shaped buckles). However, existing technologies have the following drawbacks:

[0004] Low reliability of fixation: A single pressure iron can only provide pressure in the vertical direction and cannot limit the expansion and deformation of the sand box in the horizontal direction; simple box clamps are prone to loosening due to thermal deformation of the sand box, thus losing their restraining function.

[0005] Low disassembly efficiency: The pressure iron and the sand box are in rigid contact. When the sand mold cools and shrinks after pouring, it is easy to stick to the pressure iron. It needs to be disassembled by manual hammering, which is time-consuming and labor-intensive.

[0006] Therefore, there is an urgent need for a structurally optimized anti-expansion device that can constrain sand box deformation in multiple directions to improve casting production quality and efficiency. Utility Model Content

[0007] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model provides a box-pressing iron linkage anti-expansion box device for resin sand molding.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A resin sand molding box-clamp linkage anti-expansion box device includes an upper sand box, a lower sand box, and a pressure iron. The upper sand box and the lower sand box are locked together by an adjustable box clamp. An elastic buffer structure is provided on the upper end face of the upper sand box, and a pressure iron is provided on the upper end of the elastic buffer structure. The elastic buffer structure includes an upper pressure-resistant isolation layer, a rubber buffer layer, and a lower pressure-resistant heat insulation layer arranged in sequence. The upper pressure-resistant isolation layer is in contact with the pressure iron, and the lower pressure-resistant heat insulation layer is in contact with the upper sand box.

[0010] Furthermore, the upper pressure-resistant isolation layer and the lower pressure-resistant heat insulation layer are both ceramic plates, and the rubber buffer layer is a fluororubber block.

[0011] Furthermore, the elastic buffer structure is generally plate-shaped or cylindrical.

[0012] Furthermore, the adjustable box clip includes a U-shaped clip housing, which includes one side wall, a connecting wall, and two side walls;

[0013] Specifically, an annular upper pressing plate is provided on the outer periphery of the upper sand box, and an annular lower pressing plate is provided on the outer periphery of the lower sand box; the clip shell is fitted over the upper pressing plate and the lower pressing plate.

[0014] Specifically, the connecting wall is threaded with an external fixing bolt, which abuts against the side end faces of the upper and lower pressing plates. One side wall is threaded with an upper fixing bolt, which abuts tightly against the upper pressing plate. The two side walls are threaded with lower fixing bolts, which abut tightly against the lower pressing plate.

[0015] Furthermore, at least two adjustable box clips are provided on each side of the outer periphery of the upper and lower pressing plates.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This utility model achieves multi-directional (vertical and horizontal) fixation of the sand box through the coordinated constraint of the box clamp and the pressure iron, solving the problem of box expansion and improving the quality stability of castings.

[0018] 2. The elastic buffer structure of this utility model prevents the upper sand box from sticking to the pressure iron, making the device easy to disassemble. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a resin sand molding box-pressing iron linkage anti-expansion box device according to the present invention.

[0020] Figure 2 This is a schematic diagram of the elastic buffer structure in this utility model.

[0021] Figure 3 This is a schematic diagram of the adjustable box clip in this utility model.

[0022] In the diagram: 1-Upper sand box; 11-Upper pressing plate; 2-Lower sand box; 21-Lower pressing plate; 3-Pressure iron device; 4-Elastic buffer structure; 41-Upper pressure-resistant isolation layer; 42-Rubber buffer layer; 43-Lower pressure-resistant heat insulation layer; 5-Adjustable box clip; 51-Clip shell; 52-Upper fixing bolt; 53-Lower fixing bolt; 54-External fixing bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1:

[0025] Please see Figure 1 , Figure 2 This utility model provides a resin sand molding box-clamp-pressure iron linkage anti-expansion box device, including an upper sand box 1, a lower sand box 2, and a pressure iron 3. The upper sand box 1 and the lower sand box 2 are coupled together and locked with an adjustable box clamp 5. An elastic buffer structure 4 is provided on the upper end face of the upper sand box 1, and a pressure iron 3 is provided on the upper end of the elastic buffer structure 4. The pressure iron 3 restricts the vertical expansion of the upper sand box 1, the elastic buffer structure 4 prevents the pressure iron 3 from sticking to the upper sand box 1 and facilitates disassembly, and the adjustable box clamp 5 restricts the horizontal expansion of the upper sand box 1 and the lower sand box 2.

[0026] Furthermore, the elastic buffer structure 4 includes an upper pressure-resistant isolation layer 41, a rubber buffer layer 42, and a lower pressure-resistant heat insulation layer 43. The upper pressure-resistant isolation layer 41 is used to prevent the rubber buffer layer 42 from sticking to the pressure iron 3 under long-term pressure contact. The rubber buffer layer 42 is used to absorb the stress when the upper surface of the upper sand box 1 expands unevenly. The lower pressure-resistant heat insulation layer 43 is used to separate the rubber buffer layer 42 from the upper sand box 1, avoid high temperature affecting the performance of the rubber buffer layer 42, and avoid the rubber buffer layer 42 from sticking to the upper sand box 1.

[0027] Specifically, the elastic buffer structure 4 is a plate to achieve uniform pressure on the whole, or the elastic buffer structure 4 is at least 5 cylinders, of which four are set at the four corners to ensure the stability of the pressure iron, and the rest are set at the easily expandable parts on the upper surface of the upper sand box 1.

[0028] Preferably, the upper pressure-resistant isolation layer 41 and the lower pressure-resistant heat insulation layer 43 are both ceramic plates, and the rubber buffer layer 42 is a fluororubber block. The fluororubber block exhibits minimal performance degradation at high temperatures and minimal performance changes under the heat waves of the sandbox. The ceramic plate and the fluororubber block do not react chemically, nor do they diffuse or exhibit strong intermolecular forces, so effective adhesion cannot be formed by pressure alone. The upper pressure-resistant isolation layer 41 uses an Al2O3 ceramic plate to reduce costs, and the lower pressure-resistant heat insulation layer 43 uses a ceramic fiber composite plate to improve heat insulation performance. Both the Al2O3 ceramic plate and the ceramic fiber composite plate have the compressive strength to withstand sandbox pressure less than 0.8 MPa.

[0029] Furthermore, the adjustable box clip 5 includes a U-shaped clip housing 51, which includes a side wall, a connecting wall, and two side walls. An annular upper pressing plate 11 is provided around the outer periphery of the upper sand box 1, and an annular lower pressing plate 21 is provided around the outer periphery of the lower sand box 2. The clip housing 51 is fitted over the upper pressing plate 11 and the lower pressing plate 21. An external fixing bolt 54 is threaded onto the connecting wall, and the external fixing bolt 54 abuts against the side end faces of the upper pressing plate 11 and the lower pressing plate 21. An upper fixing bolt 52 is threaded onto one side wall, and the upper fixing bolt 52 abuts against the upper pressing plate 11. 1. The two side walls are threaded together with the lower fixing bolt 53, which is tightly abutted against the lower pressing plate 21. The upper pressing plate 11 and the lower pressing plate 21 are connected as an integrated unit by the clip housing 51, the upper fixing bolt 52, the lower fixing bolt 53, and the outer fixing bolt 54. When the pressing plate moves outward due to expansion, the outer fixing bolt 54 is pressed, which drives the lower fixing bolt 53 and the upper fixing bolt 52 to move. The pressing plate moves in coordination through the fastening friction between the lower fixing bolt 53, the upper fixing bolt 52 and the corresponding pressing plate, and restricts the expansion movement of the pressing plate.

[0030] Specifically, at least two adjustable box clips 5 are provided on each side of the outer periphery of the upper pressing plate 11 and the lower pressing plate 21.

[0031] In use, place the pre-shaped lower sand box 2 on the ground / frame foundation, install the pre-shaped upper sand box 1, install the adjustable box clip 5, place the elastic buffer structure 4 on the upper surface of the upper sand box 1, place the pressure iron 3 on the upper end of the elastic buffer structure 4, and use bolts, nuts or ropes to fix the pressure iron 3 to the foundation and apply the preset pressure force.

[0032] During casting, the high temperature causes the upper surface of the upper sand box 1 to expand upwards, and the elastic buffer structure 4 is further deformed under pressure, absorbing the expansion stress and limiting the expansion. The high temperature causes the upper sand box 1 and the lower sand box 2 to expand horizontally. There is a difference in the horizontal expansion stress between the upper sand box 1 and the lower sand box 2. By adjusting the box clamp 5 to coordinate the horizontal expansion stress of the upper sand box 1 and the lower sand box 2, the deformation at the connection is made consistent, and the adjustable box clamp 5 is prevented from disengaging.

[0033] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0034] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A resin sand molding box-pressor linkage anti-expansion box device, comprising an upper sand box, a lower sand box, and a pressor, characterized in that, When the upper sand box and the lower sand box are aligned, they are locked together by an adjustable box clip. An elastic buffer structure is provided on the upper end face of the upper sand box, and a pressure iron is provided on the upper end of the elastic buffer structure. The elastic buffer structure includes an upper pressure-resistant isolation layer, a rubber buffer layer, and a lower pressure-resistant heat insulation layer arranged in sequence; the upper pressure-resistant isolation layer is in contact with the pressure iron, and the lower pressure-resistant heat insulation layer is in contact with the upper sand box.

2. The anti-expansion box device for resin sand molding using a box-clamping and pressure iron linkage as described in claim 1, characterized in that, The upper pressure-resistant isolation layer and the lower pressure-resistant heat insulation layer are both ceramic plates, and the rubber buffer layer is a fluororubber block.

3. The anti-expansion box device for resin sand molding using a box-clamping and pressure iron linkage as described in claim 1, characterized in that, The elastic buffer structure is generally plate-shaped or cylindrical.

4. The anti-expansion box device for resin sand molding using a box-clamping and pressure iron linkage as described in claim 1, characterized in that, The adjustable box clip includes a U-shaped clip housing, which includes one side wall, a connecting wall, and two side walls; The upper sand box is provided with an annular upper pressing plate on its outer periphery, and the lower sand box is provided with an annular lower pressing plate on its outer periphery; the clip shell is fitted over the upper pressing plate and the lower pressing plate; The connecting wall is threaded with an external fixing bolt, which abuts against the side end faces of the upper and lower pressing plates. One side wall is threaded with an upper fixing bolt, which abuts tightly against the upper pressing plate. The two side walls are threaded with lower fixing bolts, which abut tightly against the lower pressing plate.

5. The anti-expansion box device for resin sand molding using a box-clamping and pressure iron linkage as described in claim 4, characterized in that, At least two adjustable box clips are provided on each side of the outer periphery of the upper and lower pressing plates.

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