Sand blocking mechanism for core shell machine

Abstract

The utility model relates to the technical field of shell core machine, disclose a kind of sand blocking mechanism of sanding of shell core machine, including mounting bracket, the upper portion of mounting bracket is equipped with sand bin, the lower portion of mounting bracket is provided with fixed frame, the lower portion of fixed frame is slidably equipped with sand baffle, the sand baffle is provided with guide unit, sand bucket is contacted with guide unit after moving to the lower portion of fixed frame, realize guide unit drive sand baffle movement and open the outlet of sand bin, and then sand material is guided into sand bucket.In the utility model, after sand bucket moves to the lower portion of sand bin, sand baffle opens the outlet of sand bin by guide unit, realizes the feeding of sand bucket, when cleaning old sand material in sand bucket, the position of sand baffle is limited by limiting unit, so that sand baffle and the outlet of sand bin are misaligned, and then the outlet of sand bin is in normal open state, so as to quickly empty old sand in sand bin, realize the replacement of sand material in sand bin.

Description

Technical Field

[0001] This utility model relates to the field of shell core machine technology, and in particular to a sand-blocking mechanism for sand discharge in a shell core machine. Background Technology

[0002] In the foundry industry, core-forming machines are frequently used. After sand injection, certain core-forming machines, following processes such as venting, can separate from the mold-forming mechanism to continue the curing process. Once curing is complete, the mold is opened and the sand core is removed, preparing for the next work cycle.

[0003] A shell core machine patent with authorization announcement number CN213002511U includes a frame, a sand-shooting assembly, a sand hopper lifting assembly, a mold assembly, a mold pushing assembly, and an electric heating device placed on the mold assembly. It also includes a track assembly and a rotating mechanism. This shell core machine can only discharge and block sand through a sand-discharging plate on top of the sand-shooting hopper, making it impossible to keep the sand discharge port open. When selecting different types of coated sand, manual operation is required to keep the sand discharge port open for sand changing, resulting in low work efficiency and high worker workload. Therefore, a sand-blocking mechanism for the sand discharge of a shell core machine is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a sand-blocking mechanism for a core-filling machine, which can quickly empty the old sand in the sand chamber and replace the sand material in the sand chamber.

[0005] This utility model adopts the following technical solution: a sand-blocking mechanism for a core-feeding machine, including a mounting frame, a sand bin above the mounting frame, a fixing frame below the mounting frame, a sand-blocking plate slidably below the fixing frame, a guide unit on the sand-blocking plate, and a sand bucket contacting the guide unit after moving below the fixing frame, thereby driving the sand-blocking plate to open the outlet of the sand bin and guiding the sand into the sand bucket. A limiting unit for limiting the position of the sand-blocking plate is provided between the mounting plate and the sliding seat.

[0006] Preferably, the fixing frame includes a vertical plate and a horizontal plate. The vertical plate is fixed below the mounting frame, and the horizontal plate is horizontally fixed at one end of the vertical plate. A slide rail is provided below the horizontal plate, and the sand baffle is installed on the slide rail. A discharge port corresponding to the sand bin outlet is opened on the horizontal plate.

[0007] Preferably, the slide rail includes two fixed plates, and a T-shaped slide is formed between the two fixed plates. The sand baffle is located inside the T-shaped slide and is adapted to the T-shaped slide.

[0008] Preferably, the guide unit includes a sliding seat fixed to the lower side of the sand baffle plate. The sliding seat is L-shaped. An installation plate is fixedly connected to one end of the horizontal plate near the vertical plate. An installation rod is provided between the installation plate and the sliding seat. A first elastic element is provided between the installation plate and the sliding seat.

[0009] Preferably, a top rod is installed on the side of the sliding seat facing the sand bucket.

[0010] Preferably, the limiting unit includes a limiting rod disposed on the sliding seat, and the limiting rod is a screw.

[0011] Preferably, a positioning unit for defining the position of the sand baffle is provided between the mounting plate and the sliding seat. The positioning unit includes a positioning seat and a positioning rod. The positioning seat is fixed on the side of the mounting plate away from the horizontal plate. The positioning seat has a positioning hole. Two symmetrically arranged positioning units are installed on the positioning seat. The positioning rod is fixed on the sliding seat. The positioning rod has a first conical column, which corresponds to the positioning hole.

[0012] Preferably, the end of the positioning rod away from the sliding seat is provided with a connecting rod, the first conical column is fixed on the end of the connecting rod away from the positioning rod, the connecting rod is sleeved with a second conical column, a second elastic element is provided between the second conical column and the first conical column, and the conical surfaces of the first conical column and the second conical column are in opposite directions.

[0013] Preferably, a groove for accommodating the second elastic element is provided between the first conical column and the second conical column.

[0014] Preferably, the positioning unit includes a sliding rod and a positioning block. Stepped holes are provided on both sides of the positioning hole. The positioning block is fixed on the sliding rod and located in the stepped hole. A third elastic element is provided between the positioning block and the stepped hole. The end of the positioning block away from the sliding rod has an inclined surface and is used in conjunction with the first conical column and the second conical column, respectively.

[0015] The beneficial effects of this utility model are:

[0016] After the sand bucket is moved to the bottom of the sand silo, the guide unit causes the baffle plate to open the outlet of the sand silo, allowing the sand bucket to be filled. When cleaning the old sand in the sand bucket, the position of the baffle plate is limited by the limiting unit, so that the baffle plate is misaligned with the outlet of the sand silo, thereby keeping the outlet of the sand silo in a normally open state, so as to quickly empty the old sand in the sand silo and realize the replacement of the sand in the sand silo. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sand-blocking mechanism of this utility model;

[0018] Figure 2This is a schematic diagram of the structure of the sliding seat of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the fixing frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the positioning seat of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the positioning seat of this utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the first conical column of this utility model;

[0023] Figure 7 This is a schematic diagram of the positioning unit of this utility model.

[0024] In the picture:

[0025] 1. Mounting frame; 11. Sand bin; 2. Fixing frame; 3. Sand baffle plate; 4. Sand bucket; 21. Vertical plate; 22. Horizontal plate; 23. Slide rail; 211. Mounting plate; 221. Discharge port; 31. Sliding seat; 311. Top rod; 312. Mounting rod; 313. First elastic element; 33. Limiting rod; 34. Positioning seat; 341. Positioning hole; 342. Stepped hole; 35. Positioning unit; 301. Positioning rod; 302. Connecting rod; 303. First conical column; 304. Second conical column; 305. Second elastic element; 351. Sliding rod; 352. Third elastic element; 353. Positioning block. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0027] like Figures 1 to 7 As shown, a sand-blocking mechanism for a core-feeding machine includes a mounting frame 1, a sand bin 11 with a cone-shaped top, a fixing frame 2 with a sand baffle 3 slidably mounted below the fixing frame 2, and a guide unit on the sand baffle 3. A sand bucket 4 is located below the mounting frame 1 and can slide along the front-back direction of the mounting frame 1. After the sand bucket 4 moves to the bottom of the fixing frame 2, it contacts the guide unit, which drives the sand baffle 3 to move and open the outlet of the sand bin 11, thereby guiding the sand into the sand bucket 4. A limiting unit for limiting the position of the sand baffle 3 is provided between the mounting plate 211 and the sliding seat 31.

[0028] The fixing frame 2 includes a vertical plate 21 and a horizontal plate 22. The vertical plate 21 is fixed below the mounting frame 1, and the horizontal plate 22 is horizontally fixed to one end of the vertical plate 21. A slide rail 23 is provided below the horizontal plate 22, and a sand baffle 3 is installed on the slide rail 23. Furthermore, the slide rail 23 includes two fixing plates, and a T-shaped slide is formed between the two fixing plates. The sand baffle 3 is located in the T-shaped slide and is adapted to the T-shaped slide. A discharge port 221 corresponding to the outlet of the sand bin 11 is opened on the horizontal plate 22.

[0029] The guiding unit includes a sliding seat 31 fixed to the lower side of the sand baffle plate 3. The sliding seat 31 is L-shaped. A mounting plate 211 is fixedly connected to one end of the horizontal plate 22 near the vertical plate 21. A mounting rod 312 is provided between the mounting plate 211 and the sliding seat 31. The mounting rod 312 is a threaded rod and passes through the mounting plate 211 and is threadedly connected to the sliding seat 31. A first elastic element 313 is provided between the mounting plate 211 and the sliding seat 31. The first elastic element 313 is a spring and is sleeved on the mounting rod 312. In order to contact the sand bucket 4 more quickly and increase the moving distance of the sliding seat 31, in this embodiment, a top rod 311 is installed on the side of the sliding seat 31 facing the sand bucket 4.

[0030] In order to keep the discharge port 221 on the horizontal plate 22 in a normally open state so as to clean the old sand in the sand bin 11, in this embodiment, the limiting unit includes a limiting rod 33 provided on the sliding seat 31. The limiting rod 33 is a screw. After the tail end of the sliding seat 31 moves and protrudes from the mounting plate 211, the limiting rod 33 protrudes from the sliding seat 31 and contacts the mounting plate 211, thereby limiting the position of the sliding seat 31.

[0031] In the above scheme, in the initial state, the positioning block 353 protrudes from the stepped hole 342 and is located inside the positioning hole 341. During the movement of the sand bucket 4, it contacts the top rod 311 and pushes the sand baffle 3 on the sliding seat 31 to move, thereby opening the discharge port 221 on the horizontal plate 22. The material in the sand bin 11 will enter the sand bucket 4 from the discharge port 221. At this time, the first conical column 303 contacts the positioning block 353, and the first elastic element 313 is compressed by force. After the material in the sand bin 11 has filled the sand bucket 4, the sand bin 11 moves out from under the horizontal plate 22, the first elastic element 313 resets, and drives the sand baffle 3 on the sliding seat 31 to block the discharge port 221 on the horizontal plate 22, preventing the sand in the sand bin 11 from flowing out.

[0032] When it is necessary to clean the old sand in the sand bucket 4, move the sand bucket 4 to the limit position for discharging sand. At this time, move the limit rod 33 upward, protrude the sliding seat 31 and correspond to the fixed frame 2, restrict the backward movement of the sliding seat 31, and ensure that the discharge port 221 on the horizontal plate 22 is always open, so as to quickly empty the old sand in the sand bin. After the end, move the limit rod 33 downward, and the sliding seat 31 moves backward under the action of the first elastic element 313. The sand baffle 3 closes the discharge port 221, so that the sand bin 11 is replaced with new sand.

[0033] like Figures 3 to 7 As shown, the limiting unit includes a positioning seat 34 and a positioning rod 301. The positioning seat 34 is fixed to the side of the mounting plate 211 away from the horizontal plate 22. The positioning seat 34 has a positioning hole 341 arranged in the front-back direction of the positioning seat 34. Stepped holes 342 are provided on both sides of the positioning hole 341. A positioning unit 35 is provided inside the stepped hole 342. The positioning rod 301 is fixed inside the sliding seat 31. A connecting rod 302 is provided at the end of the positioning rod 301 away from the sliding seat 31. A first conical column 303 is fixedly connected at the end of the connecting rod 302 away from the positioning rod 301. The first conical column 303 corresponds to the positioning hole 341, and the diameter of the first conical column 303 is adapted to the diameter of the positioning hole 341.

[0034] A second conical post 304 is sleeved on the connecting rod 302. A second elastic element 305 is provided between the second conical post 304 and the first conical post 303 so that the second conical post 304 automatically resets after movement. The second elastic element 305 is a spring and is sleeved on the connecting rod 302. The conical surfaces of the first conical post 303 and the second conical post 304 are opposite in direction. In order to ensure that the second conical post 304 contacts the first conical post 303 after moving towards it, in this embodiment, a groove is provided between the first conical post 303 and the second conical post 304 to accommodate the second elastic element 305. This allows the second elastic element 305 to be hidden between the first conical post 303 and the second conical post 304, reducing the distance between the first conical post 303 and the second conical post 304, and preventing the positioning block 353 from locking the first conical post 303 again after disengaging from the second conical post 304.

[0035] The positioning unit 35 includes a sliding rod 351 and a positioning block 353. The positioning block 353 is fixed on the sliding rod 351 and located in the stepped hole 342. The end of the sliding rod 351 away from the positioning block 353 extends outward toward the positioning seat 34 and protrudes from the positioning seat 34. A third elastic element 352 is provided between the positioning block 353 and the stepped hole 342. The elastic coefficient of the second elastic element 305 is less than the elastic coefficient of the third elastic element 352 to ensure that the second elastic element 305 is compressed first and then compressed. The third elastic element 352 is a spring and is sleeved on the sliding rod 351. The end of the positioning block 353 away from the sliding rod 351 has an inclined surface and is used in conjunction with the first conical column 303 and the second conical column 304 respectively. The positioning unit 35 and the limiting rod 33 respectively play the role of positioning the sliding seat 31. The position of the limiting rod 33 needs to be adjusted manually to limit the position of the sliding seat 31. The positioning unit 35 only needs to drive the sliding seat 31 with force through the sand bucket 4 to limit the position of the sliding seat 31. Therefore, the positioning method of the positioning unit 35 is better than the positioning method of the limiting rod 33.

[0036] In the above scheme, when it is necessary to clean the old sand in the sand bucket 4, the sand bucket 4 will continue to move towards the sliding seat 31 from the feeding position, so that the first conical column 303 contacts the positioning block 353 and pushes the positioning block 353 towards the stepped hole 342. The third elastic element 352 is compressed by force. When the first conical column 303 breaks through the positioning block 353, the positioning block 353 is reset under the action of the third elastic element 352, which restricts the position of the first conical column 303, thereby limiting the position of the sand baffle 3 on the sliding seat 31.

[0037] After the sand in the sand bin 11 is cleaned, the sand bucket 4 moves toward the sliding seat 31 again. At this time, the second conical column 304 contacts the positioning block 353 and breaks through the positioning block 353 with the inclined surface of the positioning block 353. Under the action of the third elastic element 352, the positioning block 353 holds the conical surface of the second conical column 304. Then the sand bucket 4 moves away from the sliding seat 31. At this time, the second conical column 304 slides on the connecting rod 302 under the action of the positioning block 353 and contacts the first conical column 303. At this time, the second elastic element 305 is compressed by force, and the second conical column 304 stops moving. The positioning block 353 enters the stepped hole 342 through the conical surface of the second conical column 304, so that the first conical column 303 and the second conical column 304 are separated from the positioning block 353 together, thereby realizing the reset of the sand baffle 3 and blocking the discharge port 221 on the horizontal plate 22.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sand-blocking mechanism for a core-feeding machine, comprising a mounting frame, wherein a sand bin is provided above the mounting frame, characterized in that: A fixed frame is provided below the mounting frame, and a sand baffle is slidably provided below the fixed frame. A guide unit is provided on the sand baffle. After the sand bucket moves to the bottom of the fixed frame, it contacts the guide unit, so that the guide unit drives the sand baffle to move and open the outlet of the sand chamber, thereby introducing sand into the sand bucket. The fixed frame includes a vertical plate and a horizontal plate. The vertical plate is fixed below the mounting frame, and the horizontal plate is horizontally fixed to one end of the vertical plate. An mounting plate is fixedly connected to the end face of the horizontal plate near the vertical plate. A limiting unit for limiting the position of the sand baffle is provided between the mounting plate and the sliding seat.

2. The sand-blocking mechanism for the core-laying machine according to claim 1, characterized in that: A slide rail is provided below the horizontal plate, the sand baffle is installed on the slide rail, and a discharge port corresponding to the sand bin outlet is opened on the horizontal plate.

3. The sand-blocking mechanism for the core-feeding machine according to claim 2, characterized in that: The slide rail includes two fixed plates, and a T-shaped slide is formed between the two fixed plates. The sand baffle is located inside the T-shaped slide and is adapted to the T-shaped slide.

4. The sand-blocking mechanism for the core-making machine according to claim 3, characterized in that: The guide unit includes a sliding seat fixed to the lower side of the sand baffle plate. The sliding seat is L-shaped. An installation rod is provided between the mounting plate and the sliding seat. A first elastic element is provided between the mounting plate and the sliding seat.

5. The sand-blocking mechanism for the core-laying machine according to claim 4, characterized in that: A top rod is installed on the side of the sliding seat facing the sand bucket.

6. The sand-blocking mechanism for the core-making machine according to claim 4, characterized in that: The limiting unit includes a limiting rod disposed on the sliding seat, and the limiting rod is a screw.

7. The sand-blocking mechanism for the core-feeding machine according to claim 5, characterized in that: The limiting unit includes a positioning seat and a positioning rod. The positioning seat is fixed to the side of the mounting plate away from the horizontal plate. The positioning seat has a positioning hole. Two symmetrically arranged positioning units are installed on the positioning seat. The positioning rod is fixed to the sliding seat. The positioning rod has a first conical column, which corresponds to the positioning hole.

8. The sand-blocking mechanism for the core-feeding machine according to claim 7, characterized in that: The positioning rod is provided with a connecting rod at the end away from the sliding seat. The first conical column is fixed on the end of the connecting rod away from the positioning rod. A second conical column is sleeved on the connecting rod. A second elastic element is provided between the second conical column and the first conical column. The conical surfaces of the first conical column and the second conical column are in opposite directions.

9. The sand-blocking mechanism for the core-laying machine according to claim 8, characterized in that: A groove for accommodating the second elastic element is provided between the first and second conical columns.

10. The sand-blocking mechanism for the core-making machine according to claim 7, characterized in that: The positioning unit includes a sliding rod and a positioning block. Stepped holes are provided on both sides of the positioning hole. The positioning block is fixed on the sliding rod and located in the stepped hole. A third elastic element is provided between the positioning block and the stepped hole. The end of the positioning block away from the sliding rod has an inclined surface and is used in conjunction with the first conical column and the second conical column respectively.

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