A sand box for a sand mold 3D printer that combines sealing and collection functions

Abstract

This utility model relates to the field of sand mold 3D printer technology, specifically a sand box for a sand mold 3D printer that combines sealing and collection functions. It includes: a sand box body and a fine sand guide component disposed within the sand box body. The sand box body comprises: an inner cavity consisting of an inner side plate and a movable base plate, with the movable base plate slidably connected to the inner side plate; a sealing component disposed between the side walls of the inner side plate and the base plate to seal the gap between them; and an outer cavity consisting of an inner side plate, an outer side plate, and a fixed base plate, wherein the outer side plate is disposed outside the inner side plate, and the fixed base plate is connected to both the inner and outer side plates. The fine sand guide component is disposed within the outer cavity to guide the fine sand to the bottom of the outer cavity. This design combines sealing and collection functions, solving the technical problems of fine sand leakage during printing and waste sand collection after printing.

Description

Technical Field

[0001] This utility model relates to the field of sand mold 3D printer technology, specifically a sand box for a sand mold 3D printer that combines sealing and collection functions. Background Technology

[0002] Sand mold 3D printers use fine sand particles as the base material and binder for shaping. By laying an extremely thin layer of sand layer by layer on the bottom plate of the sand box, the sand laying mechanism scrapes the sand flat and collects the excess fine sand for recycling. Then, the binder is sprayed onto the sand layer in the area set by the program. After curing, the bottom plate of the sand box sinks to a certain depth so that sand can be laid again.

[0003] Because the sand box bottom plate and the sand box side wall are connected by a contact type and there are errors in the processing and assembly process, there will be a certain gap between the bottom of the sand box and the side wall of the sand box. During the sand laying and the descent of the sand box bottom plate, sand and gravel are very easy to leak out from the gap. The leaked fine sand material is difficult to clean, which not only wastes resources but also damages the transmission parts located below the sand box. Utility Model Content

[0004] In view of this, the present invention provides a sand box for a sand mold 3D printer that combines sealing and collection functions, aiming to solve the technical problems of fine sand leakage during the printing process and waste sand collection after printing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A sand box for a sand mold 3D printer that combines sealing and collection functions includes a sand box body and a fine sand guide disposed within the sand box body; wherein, the sand box body includes: The inner cavity is composed of an inner side plate of the sand box and a movable bottom plate, and the movable bottom plate is slidably connected to the inner side plate of the sand box. A sealing element is disposed between the inner side plate of the sand box and the side wall of the bottom plate to seal the gap between the bottom plate and the inner side plate of the sand box; The outer cavity is composed of the inner side plate of the sand box, the outer side plate of the sand box, and the fixed base plate, wherein the outer side plate of the sand box is disposed outside the inner side plate of the sand box, and the fixed base plate is connected to the inner side plate of the sand box and the outer side plate of the sand box respectively. The fine sand guide is disposed in the outer cavity and is used to guide the fine sand to the bottom of the outer cavity.

[0006] A further improvement of this utility model is that each side of the base plate is provided with a groove that extends through its length, one end of the sealing member is disposed in the groove, and the other end abuts against the inner side plate of the sand box.

[0007] A further improvement of the utility model lies in that the sealing member is in a shape of a Chinese character hui.

[0008] A further improvement of the utility model lies in that the cross section of the sealing member is rectangular, square, circular or L-shaped.

[0009] A further improvement of the utility model lies in that the material of the sealing member is cotton felt or polyurethane.

[0010] A further improvement of the utility model lies in that the outer side plate of the sand flask comprises: two outer long plates arranged in parallel, and two outer short plates arranged in parallel between the two outer long plates; the inner side plate of the sand flask comprises two inner long plates and two inner short plates, and the length of the inner long plate is equal to that of the outer long plate; four outer cavities are formed between the inner side plate of the sand flask and the outer side plate of the sand flask.

[0011] A further improvement of the utility model lies in that the fine sand guide member comprises an inclined plate arranged in each outer cavity, the upper end of the inclined plate is arranged adjacent to one side edge of the top opening of the outer cavity, and the lower end of the inclined plate extends toward the bottom wall of the outer cavity.

[0012] A further improvement of the utility model lies in that each outer cavity is provided with a sand discharge outlet.

[0013] Due to the adoption of the above technical solution, the technical progress obtained by the utility model is: An embodiment of the utility model provides a sand flask for sand mold 3D printer that has both sealing and collecting functions. By arranging the sealing member, the gap caused by processing and assembly between the sand flask bottom plate and the inner side wall of the sand flask can be filled during the lifting process of the sand flask bottom plate, so as to prevent sand leakage and avoid scratching the side wall of the sand flask; in addition, by arranging the sand flask body to a structure comprising an inner cavity and an outer cavity, with the bottom plate arranged in the inner cavity and the fine sand guide member arranged in the outer cavity, after the sand spreading mechanism scrapes the sand flat, excess fine sand can be collected into the outer cavity for recycling, so that the sand flask has both sealing and collecting functions, and the structure is simple and suitable for large-scale popularization. Description of Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0015] Figure 1 is a schematic structural diagram of a sand flask for sand mold 3D printer with both sealing and collecting functions provided by the utility model; Figure 2 This is a front view of a sand box for a sand mold 3D printer that combines sealing and collection functions, omitting the fine sand guide component.

[0016] Figure 3 yes Figure 2 Sectional view of AA.

[0017] Figure 4 This is a structural diagram of a sand box bottom plate and a sand box inner side plate provided by this utility model.

[0018] The numbers in the diagram are: 100 inner cavity, 200 seal, 300 outer cavity, 400 fine sand guide, 1 inner side plate of sand box, 2 bottom plate of sand box, and 3 outer side plate of sand box. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, in the following description, specific details such as particular system structures and technologies are set forth for illustrative purposes rather than for limiting purposes, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art should understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details hindering the description of the present invention.

[0020] This utility model embodiment provides a sand box for a sand mold 3D printer that combines sealing and collection functions, such as Figures 1-4 As shown, it includes a sand box body and a fine sand guide 400 disposed within the sand box body; as Figure 1 As shown, the sandbox body includes: The inner cavity 100 is composed of an inner side plate 1 of a sand box and a movable bottom plate, and the movable bottom plate is slidably connected to the inner side plate 1 of the sand box. Seal 200, such as Figure 4 As shown, it is disposed between the inner side plate 1 of the sand box and the side wall of the bottom plate, and is used to seal the gap between the bottom plate and the inner side plate 1 of the sand box; The outer cavity 300 is composed of the inner side plate 1 of the sand box, the outer side plate 3 of the sand box, and a fixed base plate (not shown in the figure). The outer side plate 3 of the sand box is located outside the inner side plate 1 of the sand box, and the fixed base plate is connected to the inner side plate 1 and the outer side plate 3 of the sand box respectively. The fine sand guide 400 is disposed in the outer cavity 300 and is used to guide the fine sand to the bottom of the outer cavity 300.

[0021] Specifically, such as Figure 1As shown, the outer side plate 3 of the sand box includes: two parallel outer long plates and two parallel outer short plates located between the two outer long plates; The inner side plate 1 of the sand box includes: two inner long plates and two inner short plates, and the length of the inner long plates is equal to the length of the outer long plates; Four external cavities 300 are formed between the inner side plate 1 and the outer side plate 3 of the sand box.

[0022] The sand box for a sand mold 3D printer, which combines sealing and collection functions, provided in this embodiment of the utility model, is used by placing the sand box body on the sand mold 3D printer, with the movable base plate located above the lifting device. During operation, the lifting drive device drives the movable base plate to rise and fall within the inner cavity 100 of the sand box body for sand mold casting. The movable base plate is attached to the inner wall of the inner cavity 100 through the sealing element 200. Sand material is spread on the upper surface of the movable base plate by the sand spreading device of the sand mold 3D printer. Then, the printing device of the sand mold 3D printer prints the sand spread on the movable base plate layer by layer to cast the sand mold product. After each layer is printed, the sand material is collected into the outer cavity 300.

[0023] By setting the sealing element 200, the gap between the sand box bottom plate 2 and the sand box side wall caused by processing and assembly can be filled during the lifting and lowering of the sand box bottom plate 2, preventing sand leakage and avoiding scratching the inner side wall 1 of the sand box. In addition, by setting the sand box body to include an inner cavity 100 and an outer cavity 300, with the bottom plate in the inner cavity 100 and the fine sand guide 400 set in the outer cavity 300, after the sand spreading mechanism scrapes the sand flat, the excess fine sand can be collected into the outer cavity 300 for recycling, thus combining sealing and collection functions. Moreover, this structure is simple and suitable for widespread promotion.

[0024] This invention does not limit the material and shape of the sealing element 200. For example, the sealing element 200 is made of cotton felt or polyurethane, ensuring that it has a certain degree of compressibility, enhancing the sealing effect, and preventing scratches on the sand box sidewall. Furthermore, to facilitate the installation of the sealing element 200, each side of the base plate is provided with a groove extending through its length, allowing one end of the sealing element 200 to be placed within the groove, while the other end abuts against the inner side plate 1 of the sand box. The sealing element 200 can be configured as four sequentially connected sealing strips, each abutting against a sidewall; alternatively, the sealing element 200 can be an integral U-shape, with a rectangular, square, circular, or L-shaped cross-section. Figure 4 The case with a rectangular cross-section is shown.

[0025] Furthermore, to facilitate the collection of fine sand into the outer cavity 300, such as... Figure 1As shown, the fine sand guide 400 includes an inclined plate disposed in each of the outer cavities 300. The upper end of the inclined plate is disposed near the edge of the top opening of the outer cavity 300, and its lower end extends toward the bottom wall of the outer cavity 300, so that the inclined plate, the inner side plate 1 of the sand box and the fixed bottom plate together form a guide channel with a gradually narrowing cross section. The number of inclined plates can be set as needed, and this embodiment of the utility model does not specifically limit this. In addition, each of the outer cavities 300 is provided with a sand discharge port, and the lowest point of the inclined plate is flush with the bottom of the sand discharge port, thereby ensuring that the fine sand entering the outer cavity 300 through the fine sand guide 400 can be completely discharged through the sand discharge port.

[0026] It should be noted that in this patent application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A sand box for a sand mold 3D printer that combines sealing and collection functions, characterized in that, It comprises a flask body and a fine sand guide arranged in the flask body; wherein the flask body comprises: an inner cavity formed by an inner side plate of the flask and a movable bottom plate, wherein the movable bottom plate is slidably connected with the inner side plate of the flask; a sealing member arranged between the inner side plate of the flask and a side wall of the bottom plate, for sealing a gap between the bottom plate and the inner side plate of the flask; an outer cavity formed by the inner side plate of the flask, an outer side plate of the flask and a fixed bottom plate, wherein the outer side plate of the flask is arranged on the outer side of the inner side plate of the flask, and the fixed bottom plate is connected with the inner side plate of the flask and the outer side plate of the flask respectively; the fine sand guide is arranged in the outer cavity and is used for guiding fine sand to the bottom of the outer cavity.

2. The sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 1, characterized in that, each side edge of the bottom plate is provided with a groove penetrating the length of the side edge, one end of the sealing member is arranged in the groove, and the other end abuts against the inner side plate of the flask.

3. A sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 2, characterized in that, the sealing member is in a shape of a squared ring.

4. A sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 3, characterized in that, the cross section of the sealing member is rectangular, square, circular or L-shaped.

5. The sand box for a sand mold 3D printer with both sealing and collection functions as described in any one of claims 1 to 4, characterized in that, the sealing member is made of cotton felt or polyurethane.

6. A sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 1, characterized in that, the outer side plate of the flask comprises two outer long plates arranged in parallel, and two outer short plates arranged in parallel between the two outer long plates; the inner side plate of the flask comprises two inner long plates and two inner short plates, and the length of the inner long plates is equal to that of the outer long plates; four outer cavities are formed between the inner side plate of the flask and the outer side plate of the flask.

7. A sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 6, characterized in that, the fine sand guide comprises an inclined plate arranged in each of the outer cavities, the upper end of the inclined plate is arranged adjacent to one side edge of the top opening of the outer cavity, and the lower end of the inclined plate extends toward the bottom wall of the outer cavity.

8. A sand box for a sand mold 3D printer that combines sealing and collection functions according to claim 6 or 7, characterized in that, each of the outer cavities is provided with a sand discharge opening.

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