Anti-leakage sand laying device and method

Abstract

The present invention discloses a leakage-proof sand-laying device and method, including a negative pressure device, a transmission device, a conical sealing device and a sand-laying device body, wherein the negative pressure device is installed on the top of the sand-laying device body, the transmission device is arranged on the inner and outer sides of the sand-laying device body, and the conical sealing device is arranged on the inner and outer sides of the sand-laying device body. The rotation of the cam is controlled by a rotating cylinder, and the conical sealing structure is squeezed to the lower sand opening by the cam, and then automatically reset by a spring. When squeezed, the sand accumulation density is large, thereby achieving the effect of preventing sand leakage. The sand-laying sand storage bin is designed as a closed space, and the spiral structure of the sand-laying device for transmitting sand is designed to extend to the outer side. A negative pressure pipe is designed above the sand-laying device, and by providing negative pressure, the sand is prevented from leaking, thereby improving the safety of the sand-laying device for storing sand, avoiding sand shortage and sand leakage during printing, reducing printing costs, and reducing the cost of manual sand cleaning, thereby improving the efficiency of the entire printing process.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printers, and in particular relates to a leakage-proof sand-laying device and method. Background Art

[0002] At present, when using sand mold 3D printer equipment for casting to print the whole box of molds, some difficult-to-clean substances are formed due to the mutual reaction of additives in the sand. These substances will stick to the bottom plate of the powder laying equipment during continuous printing, resulting in sand pulling during the sand laying process.

[0003] Due to the above reasons, a cleaning mechanism is specially designed to clean the scraper plate at the rear side of the working box, and to manually clean the crystallized material on the scraper plate at the front side of the working box. During the entire cleaning process, there is no blockage on the lower side of the sand spreader, and sand continuously leaks from the lower sand port of the sand spreader, causing the sand spreader to fail to add sand in time, and the sand is interrupted during the sand spreading process, resulting in waste products. At the same time, a large amount of sand is wasted, and the leaked sand needs to be cleaned manually, which is time-consuming and laborious. In response to this situation, this patent proposes a leak-proof sand spreading device. Summary of the invention

[0004] The object of the present invention is to provide a leakage-proof sand-spreading device and method, so as to solve the problem that during use of an existing sand-spreading device proposed in the above background technology, since there is no blockage on the lower side of the sand-spreading device during the entire cleaning process, sand continuously leaks out from the lower sand port of the sand-spreading device, causing the sand-spreading device to fail to add sand in time, thereby causing sand to be interrupted during the sand-spreading process and resulting in waste.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a leakage-proof sand-laying device, comprising a negative pressure device, a transmission device, a conical sealing device and a sand-laying device body, wherein the negative pressure device is installed on the top of the sand-laying device body, the transmission device is arranged on the inner and outer sides of the sand-laying device body, and the conical sealing device is arranged on the inner and outer sides of the sand-laying device body.

[0006] The negative pressure device comprises a negative pressure pipe, and a sand spreading device cover plate is fixedly installed at the bottom of the negative pressure pipe.

[0007] The transmission device includes a three-way joint, a gate valve is movably installed on the top of the three-way joint, a stirring wheel motor is fixedly installed on one end of the three-way joint, a spiral rod is fixedly installed on the driving end of the stirring wheel motor, and a bearing is fixedly installed on the outer side of the end of the spiral rod away from the stirring wheel motor.

[0008] The conical sealing device includes a rotary cylinder and a conical seal, a cam is fixedly mounted on the output end of the rotary cylinder, a spring connecting plate is fixedly mounted on the bottom of the conical seal, a spring is fixedly mounted on the bottom of the spring connecting plate, and a spring support plate is fixedly mounted on one end of the spring away from the spring connecting plate.

[0009] The sand paving machine body comprises a sand paving machine shell, a vibration component is fixedly installed on one side of the sand paving machine shell, and a sand scraping plate is fixedly installed on the bottom of the sand paving machine shell.

[0010] Preferably, the specific steps of using the anti-leakage sand-laying device are as follows:

[0011] S1: Turn on the agitator motor, then open the plug valve, add sand to the inside of the three-way joint, the driving end of the agitator motor drives the spiral rod to rotate, and the spiral rod transfers the sand in the three-way joint to the inside of the sand paving device shell until the sand is full, turn on the vibration component to vibrate the sand paving device shell, so that the sand inside the sand paving device shell is discharged from the lower sand port, so that the sand paving device can pave sand normally;

[0012] S2: After the sand paving machine has finished sand paving normally, close the gate valve and open the negative pressure pipe to generate negative pressure inside the sand paving machine shell to reduce the weight of the sand;

[0013] S3: The rotating cylinder drives the cam to rotate 90°, and the conical seal moves downward under the pressure of the cam. The central axis of the spring connecting plate compresses the spring under the guidance of the inner hole of the spring supporting plate. The side angle of the conical seal is the same as the angle of the inner cavity of the sand paving device shell, so that the conical seal seals the lower sand opening, and the sand is cleaned by the scraper plate at the bottom of the sand paving device shell;

[0014] S4: After cleaning, open the gate valve, close the negative pressure pipe, and rotate the cylinder to drive the cam to rotate 90° in the opposite direction. The spring resets, causing the conical seal to rise, the lower sand port to open, and normal sand laying is carried out again.

[0015] Preferably, the sand paving device cover plate is installed on the top of the sand paving device housing, and the sand paving device cover plate and the sand paving device housing are sealed.

[0016] Preferably, the end of the three-way joint away from the impeller motor is connected to one side of the sand spreading machine housing, the spiral rod is located inside the three-way joint and the sand spreading machine housing, and the bearing is fixedly installed inside the side wall of the sand spreading machine housing away from the three-way joint.

[0017] Preferably, the rotary cylinder is installed on one side of the sand spreading device housing, the conical seal is located directly below the cam, and the spring support plate is fixedly installed inside the sand spreading device housing.

[0018] Preferably, a sand lowering opening is provided at the bottom of the sand spreading device housing, and there are two sand scraping plates, and the sand lowering opening is located between the two sand scraping plates.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The cam is controlled to rotate by rotating the cylinder, and the conical sealing structure is squeezed to the lower sand port by the cam, and then automatically reset by the spring. When squeezed, the sand is piled up densely, so that there is no sand leakage. The sand storage bin is designed as a closed space, and the spiral structure of the sand spreader is designed to extend to the outside. A negative pressure pipe is designed above the sand spreader to prevent sand leakage by providing negative pressure, thereby improving the safety of the sand storage of the sand spreader, avoiding sand shortage and sand leakage during printing, reducing printing costs, and reducing the cost of manual sand cleaning, thereby improving the efficiency of the entire printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional appearance structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the negative pressure device of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the transmission device of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the conical sealing device of the present invention;

[0025] Figure 5 It is a schematic diagram of the main structure of the sand spreading device of the present invention;

[0026] Figure 6 This is a schematic diagram of a partial cross-sectional structure of the present invention in a normal sand-laying state;

[0027] Figure 7 It is a right side cross-sectional structural schematic diagram of the normal sand-laying state of the present invention;

[0028] Figure 8 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0029] Fig. 9 It is a schematic diagram of the enlarged structure of point B of the present invention;

[0030] Fig.10 It is a schematic diagram of a partial cross-sectional structure of the present invention in a state of cleaning and preventing sand leakage;

[0031] Fig.11 It is a right side cross-sectional structural schematic diagram of the present invention in a state of cleaning and preventing sand leakage;

[0032] Fig.12 It is a schematic diagram of the enlarged structure of position C of the present invention;

[0033] Fig.13 It is a schematic diagram of the enlarged structure of point D of the present invention.

[0034] In the figure: 10, negative pressure device; 11, negative pressure pipe; 12, sand spreader cover; 20, transmission device; 21, bearing; 22, screw rod; 23, three-way joint; 24, agitator motor; 25, plug valve; 30, conical sealing device; 31, rotary cylinder; 32, cam; 33, spring connecting plate; 34, spring; 35, spring support plate; 36, conical sealing; 40, sand spreader body; 41, sand spreader shell; 42, vibration component; 43, scraper plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-13 The present invention provides a technical solution: a leakage-proof sand-laying device, comprising a negative pressure device 10, a transmission device 20, a conical sealing device 30 and a sand-laying device body 40, the negative pressure device 10 is installed on the top of the sand-laying device body 40, the transmission device 20 is arranged on the inner and outer sides of the sand-laying device body 40, and the conical sealing device 30 is arranged on the inner and outer sides of the sand-laying device body 40.

[0037] The negative pressure device 10 comprises a negative pressure pipe 11 , and a sand spreading device cover plate 12 is fixedly mounted on the bottom of the negative pressure pipe 11 .

[0038] The transmission device 20 includes a three-way joint 23, a gate valve 25 is movably installed on the top of the three-way joint 23, a stirring wheel motor 24 is fixedly installed at one end of the three-way joint 23, a screw rod 22 is fixedly installed at the driving end of the stirring wheel motor 24, and a bearing 21 is fixedly installed on the outer side of the end of the screw rod 22 away from the stirring wheel motor 24.

[0039] The conical sealing device 30 includes a rotating cylinder 31 and a conical seal 36. A cam 32 is fixedly installed at the output end of the rotating cylinder 31, a spring connecting plate 33 is fixedly installed at the bottom of the conical seal 36, a spring 34 is fixedly installed at the bottom of the spring connecting plate 33, and a spring support plate 35 is fixedly installed at one end of the spring 34 away from the spring connecting plate 33.

[0040] The sanding device body 40 includes a sanding device housing 41 . A vibration component 42 is fixedly mounted on one side of the sanding device housing 41 . A sand scraping plate 43 is fixedly mounted on the bottom of the sanding device housing 41 .

[0041] In this embodiment, the agitator motor 24 is turned on, and then the gate valve 25 is opened to add sand to the three-way joint 23. The driving end of the agitator motor 24 drives the screw rod 22 to rotate, and the screw rod 22 transfers the sand in the three-way joint 23 to the inside of the sand paving device housing 41 until the sand is full. The vibration component 42 is turned on to vibrate the sand paving device housing 41, so that the sand inside the sand paving device housing 41 is discharged from the lower sand port, so that the sand paving device can spread sand normally. When it reaches the cleaning position, the gate valve 25 is closed, and the negative pressure pipe 11 is opened to generate negative pressure inside the sand paving device housing 41, thereby reducing the weight of the sand and achieving the effect of preventing sand leakage. While the negative pressure is generated, the rotating cylinder 3 1 drives the cam 32 to rotate 90°, and the conical seal 36 moves downward under the extrusion of the cam 32. The central axis of the spring connecting plate 33 is guided by the inner hole of the spring support plate 35, so that the spring 34 is compressed. The side angle of the conical seal 36 is the same as the inner angle of the sand paving device housing 41. The conical seal 36 seals the lower sand opening to prevent sand leakage. After cleaning, open the gate valve 25, close the negative pressure pipe 11, and rotate the cylinder 31 to drive the cam 32 to rotate 90° in the opposite direction. The spring 34 is reset, so that the conical seal 36 rises, the lower sand opening is opened, and normal sand paving is performed again. This is a sand paving and cleaning link, and the above steps are subsequently repeated.

[0042] Specifically, the specific steps of using the anti-leakage sand-laying device are as follows:

[0043] S1: Turn on the agitator motor 24, then open the gate valve 25, add sand into the three-way joint 23, the driving end of the agitator motor 24 drives the screw rod 22 to rotate, and the screw rod 22 transfers the sand in the three-way joint 23 to the inside of the sand paving device housing 41 until the sand is full, turn on the vibration component 42 to vibrate the sand paving device housing 41, so that the sand in the sand paving device housing 41 is discharged from the lower sand port, so that the sand paving device can pave sand normally;

[0044] S2: After the sand spreading device has finished spreading sand normally, the gate valve 25 is closed and the negative pressure pipe 11 is opened to generate negative pressure inside the sand spreading device housing 41 to reduce the weight of the sand;

[0045] S3: The rotating cylinder 31 drives the cam 32 to rotate 90°, and the conical seal 36 moves downward under the pressure of the cam 32. The central axis of the spring connecting plate 33 compresses the spring 34 under the guidance of the inner hole of the spring support plate 35. The side angle of the conical seal 36 is the same as the angle of the inner cavity of the sand paving device housing 41, so that the conical seal 36 seals the lower sand opening, and the sand is cleaned by the scraper plate 43 at the bottom of the sand paving device housing 41;

[0046] S4: After cleaning, open the gate valve 25, close the negative pressure pipe 11, and rotate the cylinder 31 to drive the cam 32 to rotate 90° in the opposite direction. The spring 34 is reset, so that the conical seal 36 rises, the lower sand opening is opened, and normal sand laying is performed again.

[0047] In this embodiment, S1 to S4 are a sanding and cleaning process, and steps S1 to S4 are subsequently cycled.

[0048] Specifically, the sand paving device cover plate 12 is installed on the top of the sand paving device housing 41 , and the sand paving device cover plate 12 and the sand paving device housing 41 are sealed.

[0049] In this embodiment, the sand spreader cover 12 and the sand spreader housing 41 are sealed, and negative pressure can be generated in the sand spreader housing 41 through the negative pressure pipe 11, so that the weight of the sand is reduced, thereby achieving the effect of preventing sand leakage.

[0050] Specifically, one end of the three-way joint 23 away from the agitator motor 24 is connected to one side of the sand spreading machine housing 41, the spiral rod 22 is located inside the three-way joint 23 and the sand spreading machine housing 41, and the bearing 21 is fixedly installed inside the side wall of the sand spreading machine housing 41 away from the three-way joint 23.

[0051] In this embodiment, the gate valve 25 is opened to add sand into the three-way joint 23, and the driving end of the agitator motor 24 drives the screw rod 22 to rotate, and the screw rod 22 transfers the sand in the three-way joint 23 to the inside of the sand spreader housing 41 until the sand is full.

[0052] Specifically, the rotary cylinder 31 is installed on one side of the sand paving device housing 41 , the conical seal 36 is located directly below the cam 32 , and the spring support plate 35 is fixedly installed inside the sand paving device housing 41 .

[0053] In this embodiment, the rotating cylinder 31 drives the cam 32 to rotate, and the conical seal 36 can move downward under the pressure of the cam 32. The central axis of the spring connecting plate 33 compresses the spring 34 under the guidance of the inner hole of the spring support plate 35.

[0054] Specifically, a sand lowering opening is provided at the bottom of the sand spreading device housing 41 , and there are two sand scraping plates 43 , and the sand lowering opening is located between the two sand scraping plates 43 .

[0055] In this embodiment, the sand inside the sand spreading device housing 41 will be discharged from the lower sand opening for sand spreading, and the function of the sand scraper 43 is to level the sand discharged from the lower sand opening.

[0056] The working principle and use process of the present invention are as follows: turn on the agitator motor 24, then open the gate valve 25, add sand into the three-way joint 23, the driving end of the agitator motor 24 drives the screw rod 22 to rotate, the screw rod 22 transfers the sand in the three-way joint 23 to the inside of the sand paving device housing 41 until the sand is full, turn on the vibration component 42 to vibrate the sand paving device housing 41, so that the sand inside the sand paving device housing 41 is discharged from the lower sand port, so that the sand paving device can spread sand normally, when it reaches the cleaning position, the gate valve 25 is closed, and the negative pressure pipe 11 is opened to generate negative pressure inside the sand paving device housing 41, reduce the weight of the sand, and achieve the effect of preventing sand leakage, while the negative pressure is generated, the rotating cylinder 31 drives the cam 32 to rotate 90°, the conical seal 36 moves downward under the extrusion of the cam 32, and the central axis of the spring connecting plate 33 is guided by the inner hole of the spring support plate 35, so that the spring 34 is compressed, and the side angle of the conical seal 36 is the same as the inner cavity angle of the sand spreading device shell 41. The conical seal 36 seals the lower sand opening to prevent sand leakage, and the sand is cleaned by the scraper plate 43 at the bottom of the sand spreading device shell 41. After cleaning, open the gate valve 25, close the negative pressure pipe 11, and rotate the cylinder 31 to drive the cam 32 to rotate 90° in the opposite direction. The spring 34 is reset, so that the conical seal 36 rises, the lower sand opening is opened, and normal sand spreading is performed again. This is a sand spreading and cleaning link, and the above steps are subsequently repeated.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sand-laying device, comprising a negative pressure device (10), a transmission device (20), a conical sealing device (30) and a sand-laying device body (40), characterized in that: The negative pressure device (10) is installed on the top of the sand paving machine body (40), the transmission device (20) is arranged on the inner side and the outer side of the sand paving machine body (40), and the conical sealing device (30) is arranged on the inner side and the outer side of the sand paving machine body (40); The negative pressure device (10) comprises a negative pressure pipe (11), and a sand spreading device cover plate (12) is fixedly mounted on the bottom of the negative pressure pipe (11); The transmission device (20) comprises a three-way joint (23), a gate valve (25) is movably mounted on the top of the three-way joint (23), a stirring wheel motor (24) is fixedly mounted on one end of the three-way joint (23), a spiral rod (22) is fixedly mounted on the driving end of the stirring wheel motor (24), and a bearing (21) is fixedly mounted on the outer side of one end of the spiral rod (22) away from the stirring wheel motor (24); The conical sealing device (30) comprises a rotary cylinder (31) and a conical seal (36); a cam (32) is fixedly mounted on the output end of the rotary cylinder (31); a spring connecting plate (33) is fixedly mounted on the bottom of the conical seal (36); a spring (34) is fixedly mounted on the bottom of the spring connecting plate (33); and a spring support plate (35) is fixedly mounted on one end of the spring (34) away from the spring connecting plate (33); The sand paving machine body (40) comprises a sand paving machine shell (41), a vibration component (42) is fixedly mounted on one side of the sand paving machine shell (41), and a sand scraping plate (43) is fixedly mounted on the bottom of the sand paving machine shell (41); The sand paving device cover plate (12) is installed on the top of the sand paving device housing (41), and the sand paving device cover plate (12) and the sand paving device housing (41) are sealed. One end of the three-way joint (23) away from the stirring wheel motor (24) is connected to one side of the sand spreading device housing (41), the spiral rod (22) is located inside the three-way joint (23) and the sand spreading device housing (41), and the bearing (21) is fixedly mounted inside the side wall of the sand spreading device housing (41) away from the three-way joint (23).

2. The anti-leakage sand-laying device according to claim 1, characterized in that: The specific steps of using the anti-leakage sand-laying device are as follows: S1: Turn on the stirring wheel motor (24), then open the plug valve (25), add sand into the three-way joint (23), the driving end of the stirring wheel motor (24) drives the screw rod (22) to rotate, and the screw rod (22) transfers the sand in the three-way joint (23) to the inside of the sand paving device housing (41) until the sand is full, turn on the vibration component (42) to vibrate the sand paving device housing (41), so that the sand in the sand paving device housing (41) is discharged from the lower sand port, so that the sand paving device can pave sand normally; S2: After the sand spreading device has finished spreading sand normally, the gate valve (25) is closed and the negative pressure pipe (11) is opened to generate negative pressure inside the sand spreading device housing (41) to reduce the weight of the sand; S3: The rotating cylinder 31 drives the cam 32 to rotate 90°, and the conical seal (36) moves downward under the pressure of the cam (32). The central axis of the spring connecting plate (33) compresses the spring (34) under the guidance of the inner hole of the spring supporting plate (35). The side angle of the conical seal (36) is the same as the inner angle of the sand paving device housing (41), so that the conical seal (36) seals the lower sand opening, and the sand is cleaned by the scraper plate (43) at the bottom of the sand paving device housing (41); S4: After cleaning is completed, the gate valve (25) is opened, the negative pressure pipe (11) is closed, the rotary cylinder (31) drives the cam (32) to rotate 90° in the opposite direction, the spring (34) is reset, so that the conical seal (36) rises, the lower sand opening is opened, and normal sand laying is performed again.

3. The anti-leakage sand-laying device according to claim 1, characterized in that: The rotary cylinder (31) is installed on one side of the sand paving device housing (41), the conical seal (36) is located directly below the cam (32), and the spring support plate (35) is fixedly installed inside the sand paving device housing (41).

4. The anti-leakage sand-laying device according to claim 1, characterized in that: The bottom of the sand spreading device housing (41) is provided with a lower sand opening, and there are two sand scraping plates (43), and the lower sand opening is located between the two sand scraping plates (43).

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