Laser 3D printing platform for manufacturing casting sand mold

Abstract

The utility model relates to the technical field of sand mold casting devices, in particular to a laser 3D printing platform for manufacturing a casting sand mold, which comprises a machine base, a sand paving component mounted on the machine base, a laser sintering component mounted on the machine base, a shielding cover fixedly connected to the machine base, and a purification box fixedly connected to the top end of the shielding cover. Two connecting pipes are fixedly connected to the two sides of the purification box, a plurality of air suction pipes are fixedly connected to one sides of the connecting pipes, the bottom ends of the air suction pipes extend into the shielding cover, four positioning columns are fixedly connected to the purification box, the four positioning columns penetrate through the box cover, and a plurality of partition plates are fixedly connected to the interior of the purification box; a plurality of activated carbon honeycomb blocks are placed between every two adjacent partition plates, and a fan is installed at the top end of the box cover. And harmful gas generated in the printing process can be adsorbed and removed, and the situation that the harmful gas is inhaled into the body by an operator and hurt the body of the operator is avoided, so that the use safety is effectively improved.

Description

Technical Field

[0001] This utility model relates to a laser 3D printing platform for casting sand molds, specifically a laser 3D printing platform for making casting sand molds, belonging to the technical field of sand casting equipment. Background Technology

[0002] The principle of laser 3D printing for casting sand molds is to use laser technology to cut and deposit material layer by layer from a digital model to form a sand mold. In practice, the three-dimensional model of the part is first designed using software. Then, the laser 3D printing equipment uses a high-energy laser beam to cut and deposit special casting sand layer by layer according to the cross-sectional graphic information of the digital model. The laser beam selectively irradiates the sand layer in a specific area, causing the sand particles to sinter and bond together to form the various cross-sections of the sand mold. After one layer is printed, the sand-laying component will lay sand again, and then the laser sintering component will sinter the laid sand layer in a specific shape again until the printing of the entire sand mold is completed.

[0003] However, when a laser beam irradiates a sand layer, it generates gases containing particles of plastic, metal, and other materials. These gases include ultrafine particles (UFP) and volatile organic compounds (VOCs). UFP can cause inflammation in the eyes and nasal cavity, while VOCs can have negative effects on short-term or long-term health. In addition, a large number of ultrafine particles (UFP) are released during the 3D printing process, which also pose potential health hazards. Since these gases are directly dispersed into the air during the printing process, they can easily be inhaled by operators, causing damage to their bodies and resulting in poor safety during use. Utility Model Content

[0004] The purpose of this invention is to provide a laser 3D printing platform for making casting sand molds to solve the above problems. It can adsorb and remove harmful gases generated during the printing process, preventing operators from inhaling harmful gases and causing damage to their bodies, thereby effectively improving the safety of use.

[0005] This utility model achieves the above-mentioned objectives through the following technical solution: a laser 3D printing platform for producing casting sand molds, comprising a base, a sand-laying assembly mounted on the base, a laser sintering assembly mounted on the base, a shield fixedly connected to the base, a purification structure provided on the shield, the purification structure comprising a purification chamber and connecting pipes, a purification chamber fixedly connected to the top of the shield, two connecting pipes fixedly connected to both sides of the purification chamber, multiple suction pipes fixedly connected to one side of each connecting pipe, the bottom end of each suction pipe extending into the interior of the shield, the suction pipes being fixedly connected to the shield, four positioning posts fixedly connected to the purification chamber, the four positioning posts penetrating the chamber cover, nuts threaded onto each positioning post, the nuts abutting against the chamber cover, multiple partitions fixedly connected inside the purification chamber, multiple activated carbon honeycomb blocks placed between adjacent partitions, a fan mounted on the top of the chamber cover, the top of the chamber cover abutting against the top of the purification chamber, and the bottom of the chamber cover abutting against the tops of the multiple partitions.

[0006] Preferably, the multiple partitions located on one side of the fan are linearly and equidistantly distributed, and the fan is located in the middle of the cover.

[0007] Preferably, the multiple suction pipes fixedly connected to the same connecting pipe are linearly and equidistantly distributed, and the cross-section of the top of the positioning column is trapezoidal.

[0008] Preferably, two guide rails are fixedly connected to the base, and a base is provided at the top of the two guide rails. Multiple guide wheels are rotatably connected to the bottom of the base.

[0009] Preferably, the width of the cross-sections at both ends of the guide wheel is greater than the width of the cross-section in the middle, and the multiple guide wheels located on the same guide rail are linearly and equidistantly distributed.

[0010] Preferably, a stop block is fixedly connected to the base, and the stop block abuts against one side of the base.

[0011] Preferably, the base is provided with a lifting structure, which includes guide columns and slide rods. Four guide columns are fixedly connected to the base, and the same slide rod is slidably connected to two adjacent guide columns. Two connecting rods are rotatably connected to both ends of the slide rod, and the other ends of the two connecting rods are rotatably connected to the same connecting shaft. The connecting shaft is fixedly connected to the connecting frame. A first electric push rod is installed on the base, and the extended end of the first electric push rod is fixedly connected to the adjacent slide rod.

[0012] Preferably, the two opposite connecting rods located on different slide rods are symmetrically arranged about the middle of the base, and the two guide posts are symmetrically distributed about the middle of the slide rods.

[0013] Preferably, two support plates are fixedly connected to the bottom of the inner side of the connecting frame, a sand-carrying plate is slidably connected to the inner side of the connecting frame, two second electric push rods are installed at the top of the support plates, and the tops of the four second electric push rods are fixedly connected to the bottom of the sand-carrying plate.

[0014] The beneficial effects of this invention are as follows: During use, sand layers can be laid using the sand-laying component. After one layer of sand is laid, the sand layer can be sintered into a specific shape using the laser sintering component. During the sintering process, a fan can be activated, and the harmful gases generated during the sintering process will enter the interior of the connecting pipe through multiple suction pipes, and then enter the interior of the purification chamber from the interior of the connecting pipe. The gases then flow inside the purification chamber. Because multiple partitions are fixedly connected inside the purification chamber, the space inside the purification chamber can be divided, allowing the gas to flow in an S-shaped path. This extends the gas flow path inside the purification chamber, facilitating contact between the gas and more activated carbon honeycomb blocks. The air is directly connected to the purification chamber, allowing for more thorough adsorption and removal of harmful gases, thus significantly improving the purification effect. The purified air is then exhausted from the chamber by a fan, preventing harmful substances from being inhaled by operators and causing harm. This effectively enhances safety and environmental friendliness. The chamber lid can be removed from the top by unscrewing the nuts on the positioning posts. Once the lid is removed, the activated carbon honeycomb blocks inside the chamber can be taken out and replaced. Regular replacement of the activated carbon honeycomb blocks prevents saturation and ensures effective purification of harmful gases. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below;

[0017] Figure 3 This is a schematic diagram of the connection structure between the guide post and the slide rod of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the connecting rod and the connecting shaft of this utility model;

[0019] Figure 5 This is a schematic diagram of the connection structure between the purification box and the partition of this utility model.

[0020] In the diagram: 1. Base; 2. Shielding cover; 3. Purification structure; 301. Purification box; 302. Connecting pipe; 303. Suction pipe; 304. Box cover; 305. Fan; 306. Partition; 307. Activated carbon honeycomb block; 308. Positioning column; 309. Nut; 4. Sand laying assembly; 5. Laser sintering assembly; 6. Base; 7. Lifting structure; 701. Guide column; 702. Slide rod; 703. First electric push rod; 704. Connecting rod; 705. Connecting shaft; 8. Connecting frame; 9. Support plate; 10. Second electric push rod; 11. Sand-carrying plate; 12. Guide wheel; 13. Guide rail; 14. Stop block. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1 , Figure 2 and Figure 5 As shown, a laser 3D printing platform for producing casting sand molds includes a base 1, a sand-laying assembly 4, and a laser sintering assembly 5. A shield 2 is fixedly connected to the base 1, and a purification structure 3 is provided on the shield 2. The purification structure 3 includes a purification chamber 301 and connecting pipes 302. The purification chamber 301 is fixedly connected to the top of the shield 2, and two connecting pipes 302 are fixedly connected to both sides of the purification chamber 301. Multiple suction pipes 303 are fixedly connected to one side of each connecting pipe 302, and the bottom end of each suction pipe 303 extends into the interior of the shield 2. The shields 2 are fixedly connected. Four positioning posts 308 are fixedly connected to the purification box 301. The four positioning posts 308 pass through the box cover 304. Nuts 309 are threadedly connected to the positioning posts 308. Nuts 309 abut against the box cover 304. Multiple partitions 306 are fixedly connected inside the purification box 301. Multiple activated carbon honeycomb blocks 307 are placed between two adjacent partitions 306. A fan 305 is installed on the top of the box cover 304. The top of the box cover 304 abuts against the top of the purification box 301. The bottom of the box cover 304 abuts against the top of the multiple partitions 306.

[0023] As a technical optimization solution of this utility model, such as Figure 1 and Figure 5As shown, the fan 305 is located in the middle of the cover 304. The multiple partitions 306 located on one side of the fan 305 are linearly and equidistantly distributed. Therefore, under the action of the fan 305, the gas on both sides can flow to the fan 305 in an S-shaped path. During the flow of the gas in the S-shaped path, it can fully contact the activated carbon honeycomb block 307, thereby improving the purification effect of harmful gases.

[0024] As a technical optimization solution of this utility model, such as Figure 1 and Figure 4 As shown, the top of the two guide rails 13 is provided with a base 6. Since the bottom of the base 6 is rotatably connected with multiple guide wheels 12, and the width of the cross section at both ends of the guide wheels 12 is greater than the width of the cross section in the middle, the multiple guide wheels 12 can roll on the guide rails 13 during the process of pulling out the base 6, thus saving more effort and facilitating the movement of the base 6.

[0025] As a technical optimization solution of this utility model, such as Figure 3 As shown, a stop 14 is fixedly connected to the base 1. When the base 6 moves toward the inside of the base 1, one side of the stop 14 will abut against the stop 14, thereby achieving quick positioning of the base 6 and improving the ease of use.

[0026] As a technical optimization solution of this utility model, such as Figure 3 and Figure 4 As shown, a lifting structure 7 is provided on the base 6. The lifting structure 7 includes guide columns 701 and slide rods 702. Four guide columns 701 are fixedly connected to the base 6. The same slide rod 702 is slidably connected to two adjacent guide columns 701. Two connecting rods 704 are rotatably connected to both ends of the slide rod 702. The other ends of the two connecting rods 704 are rotatably connected to the same connecting shaft 705. The connecting shaft 705 is fixedly connected to the connecting frame 8. A first electric push rod 703 is installed on the base 6. The extended end of the first electric push rod 703 is fixedly connected to the adjacent slide rod 702. By simultaneously controlling the extension or retraction of the first electric push rod 703, the movement of the connecting frame 8 can be realized. By moving the connecting frame 8 toward the base 6 until it abuts against the base 6, the base 6 can be pulled out from the inside of the machine base 1. After being pulled out, it is convenient to take out the sand mold printed inside the connecting frame 8.

[0027] As a technical optimization solution of this utility model, such as Figure 3 and Figure 4 As shown, two support plates 9 are fixedly connected to the bottom of the inner side of the connecting frame 8. The support plates 9 can lift the two second electric push rods 10. During the printing process, the second electric push rods 10 can control the sand-carrying plate 11 to move gradually inside the connecting frame 8 until the sand mold is completely printed.

[0028] In use, this invention allows for the laying of sand layers via the sand-laying component 4. After a layer of sand is laid, the sand layer can be sintered into a specific shape using the laser sintering component 5. During the sintering process, the fan 305 is activated. Under the action of the fan 305, the harmful gases generated during the sintering process enter the interior of the connecting pipe 302 through multiple suction pipes 303, and then enter the interior of the purification chamber 301 from the interior of the connecting pipe 302. The gases then flow within the purification chamber 301. Because multiple partitions 306 are fixedly connected inside the purification chamber 301, the space inside the purification chamber 301 can be divided, thus allowing the gases to flow freely. The S-shaped flow path extends the gas's path within the purification chamber 301, facilitating contact between the gas and more activated carbon honeycomb blocks 307. This results in more thorough adsorption and removal of harmful gases, effectively improving purification efficiency. The purified air is then exhausted from the purification chamber 301 by the fan 305, preventing harmful substances from being inhaled by operators and causing harm. This significantly enhances safety and environmental friendliness. The chamber cover 304 can be removed from the purification chamber 301 by unscrewing the nuts 309 from the positioning posts 308. After removing the top and the cover 304, the activated carbon honeycomb block 307 inside the purification box 301 can be removed and replaced. Regular replacement of the activated carbon honeycomb block 307 prevents its adsorption effect from deteriorating after saturation, thus effectively ensuring the purification effect of harmful gases. Once one layer is printed, four second electric push rods 10 can be activated simultaneously. The simultaneous retraction of the four second electric push rods 10 will cause the sand-carrying plate 11 to move towards the inside of the connecting frame 8 a distance equal to the thickness of a sand layer. Then, sand laying and sintering of the sand layer continue. The above operation is repeated until the sand mold printing is complete. Once the sand mold printing is complete, the activated carbon honeycomb block 307 can be removed and replaced. The first electric push rods 703 are moved. The extension of the first electric push rods 703 will drive the slide rod 702 to move. The movement of the slide rod 702 will drive the two connecting rods 704 to move. The simultaneous movement of the four connecting rods 704 will drive the connecting frame 8 to move towards the base 6. When the bottom end of the connecting frame 8 abuts against the top end of the base 6, the first electric push rods 703 stop extending. Then the base 6 can be pulled out from the inside of the machine base 1. During the movement of the base 6, multiple guide wheels 12 will slide on the guide rail 13. In actual use, a guide rail can be laid on one side of the machine base 1 to connect with the guide rail 13 inside the machine base 1. After the base 6 is pulled out, it is convenient to take out the sand mold printed inside.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser 3D printing platform for fabricating casting sand molds, comprising a base (1), characterized in that: A sand-laying assembly (4) is installed on the base (1), a laser sintering assembly (5) is installed on the base (1), a shield (2) is fixedly connected to the base (1), and a purification structure (3) is provided on the shield (2). The purification structure (3) includes a purification box (301) and a connecting pipe (302). The top of the shield (2) is fixedly connected to the purification box (301), and two connecting pipes (302) are fixedly connected to both sides of the purification box (301). Multiple suction pipes (303) are fixedly connected to one side of the connecting pipes (302). The bottom end of the suction pipes (303) extends into the interior of the shield (2), and the suction pipes (303) are fixedly connected to the shield (2). Four positioning posts (308) are fixedly connected to the purification box (301). The four positioning posts (308) pass through the box cover (304). Nuts (309) are threaded onto the positioning posts (308). The nuts (309) abut against the box cover (304). Multiple partitions (306) are fixedly connected inside the purification box (301). Multiple activated carbon honeycomb blocks (307) are placed between two adjacent partitions (306). A fan (305) is installed on the top of the box cover (304). The top of the box cover (304) abuts against the top of the purification box (301). The bottom of the box cover (304) abuts against the top of the multiple partitions (306).

2. The laser 3D printing platform for fabricating casting sand molds according to claim 1, characterized in that: Multiple partitions (306) located on one side of the fan (305) are linearly and equidistantly distributed, and the fan (305) is located in the middle of the cover (304).

3. The laser 3D printing platform for fabricating casting sand molds according to claim 1, characterized in that: Multiple suction pipes (303) fixedly connected to the same connecting pipe (302) are linearly and equidistantly distributed, and the top of the positioning post (308) has a trapezoidal cross-section.

4. The laser 3D printing platform for fabricating casting sand molds according to claim 1, characterized in that: Two guide rails (13) are fixedly connected to the base (1). The top of the two guide rails (13) is provided with a base (6). The bottom of the base (6) is rotatably connected with multiple guide wheels (12).

5. A laser 3D printing platform for fabricating casting sand molds according to claim 4, characterized in that: The width of the cross-sections at both ends of the guide wheel (12) is greater than the width of the cross-section in the middle. Multiple guide wheels (12) located on the same guide rail (13) are linearly and equidistantly distributed.

6. The laser 3D printing platform for fabricating casting sand molds according to claim 4, characterized in that: A stop (14) is fixedly connected to the base (1), and the stop (14) abuts against one side of the base (6).

7. A laser 3D printing platform for fabricating casting sand molds according to claim 4, characterized in that: The base (6) is provided with a lifting structure (7), which includes a guide column (701) and a slide rod (702). Four guide columns (701) are fixedly connected to the base (6). The same slide rod (702) is slidably connected to two adjacent guide columns (701). Two connecting rods (704) are rotatably connected to both ends of the slide rod (702). The other ends of the two connecting rods (704) are rotatably connected to the same connecting shaft (705). The connecting shaft (705) is fixedly connected to the connecting frame (8). A first electric push rod (703) is installed on the base (6). The extended end of the first electric push rod (703) is fixedly connected to the adjacent slide rod (702).

8. The laser 3D printing platform for fabricating casting sand molds according to claim 7, characterized in that: Two opposing connecting rods (704) located on different slide rods (702) are symmetrically arranged about the middle of the base (6), and two guide posts (701) are symmetrically distributed about the middle of the slide rods (702).

9. A laser 3D printing platform for fabricating casting sand molds according to claim 8, characterized in that: Two support plates (9) are fixedly connected to the bottom of the inner side of the connecting frame (8), and a sand-carrying plate (11) is slidably connected to the inner side of the connecting frame (8). Two second electric push rods (10) are installed on the top of the support plate (9), and the top of the four second electric push rods (10) are fixedly connected to the bottom of the sand-carrying plate (11).

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