A mold flipping mechanism

Abstract

The utility model provides a mould turnover mechanism relates to core shooting cast sand technical field, including core shooting cast sand platform, turnover frame and coupling, core shooting cast sand platform top symmetry fixed mounting has the roller bearing seat, turnover frame rotation is installed between two bearing seats, the horizontal movement platform is slidably installed on the turnover frame, the both sides end wall in the turnover frame is fixed mounting respectively has horizontal movement hydraulic cylinder and fixed mode mounting seat, the coupling fixed mounting is in the one end of the axle of turnover frame still includes the torque adjusting assembly of installation on core shooting cast sand platform, the locking assembly of installation on core shooting cast sand platform, through above -mentioned technical scheme, its purpose lies in this core shooting cast sand machine's turnover frame and movable mould mounting seat all have turnover function, facilitate sand pouring and stripping, and through the torque adjusting assembly of additional regulation transmission ratio realizes the demand to different sand mold cast sand, and locking assembly can assist accurate braking.

Description

Technical Field

[0001] This utility model relates to the field of core-shooting sand casting technology, and in particular to a mold flipping mechanism. Background Technology

[0002] Core shooting sand is a sand core used in the casting process to form internal cavities or complex structures in castings. It is made by injecting the core sand mixture into a heated mold box using a core shooting machine. During the sand casting process, the mold frame needs to be rotated 180 degrees to invert the mold box, and the excess sand is poured out through the core shooting hole at the top of the mold box.

[0003] Traditional core-shooting sand casting machines have a relatively small sand volume range, and the shaft of the tumbling frame is mostly fixed torque. It is difficult to ensure the stability of the tumbling and pouring of sand when casting sand for different sizes of sand molds, and it is also impossible to ensure the accuracy of braking, which affects the sand casting effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of traditional core-shooting sand casting machines in the prior art, which have difficulty ensuring the stability of sand reversal and pouring during the casting of large sand molds, and cannot ensure the accuracy of braking, thus affecting the sand casting effect.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a mold flipping mechanism, including a core-shooting sand-casting table, a flipping frame, and a coupling. The top of the core-shooting sand-casting table is symmetrically and fixedly mounted with roller bearing seats. The flipping frame is rotatably mounted between the two bearing seats. A transverse moving platform is slidably mounted on the flipping frame. A transverse moving hydraulic cylinder and a fixed mold mounting seat are respectively fixedly mounted on the inner two side end walls of the flipping frame. The coupling is fixedly mounted on one end of the shaft of the flipping frame. The mechanism also includes: A torque adjustment assembly installed on the core-shooting sand-casting platform; Locking assembly installed on the core-shooting sand-casting platform.

[0006] In at least some embodiments, the telescopic end of the transverse hydraulic cylinder is fixedly connected to the transverse platform, a mold mounting frame is rotatably mounted on the transverse platform, a moving mold mounting seat is mounted on the mold mounting frame at the same horizontal line as the fixed mold mounting seat, a connecting rod is fixedly welded to one end of the mold mounting frame, and a tilting hydraulic cylinder is rotatably mounted between the transverse platform and the connecting rod. When the tilting hydraulic cylinder extends to its maximum length, it drives the moving mold mounting seat to rotate 90 degrees clockwise.

[0007] In at least some embodiments, the torque adjustment assembly includes an adjustment seat, a transmission seat, and a transmission roller. The adjustment seat is fixedly installed on one side of the top of the core-shooting sand casting table. A transmission shaft and a lead screw are rotatably installed on the adjustment seat. The transmission seat is threadedly connected to the lead screw, and the rotation of the lead screw drives the transmission seat to move laterally. A transmission wheel is rotatably installed on the transmission seat and is sleeved on the transmission shaft. The shaft of the transmission roller is fixedly installed at one end of the coupling, and the surface of the transmission wheel is in close contact with the surface of the transmission roller.

[0008] In at least some embodiments, the drive shaft is provided with a plurality of protrusions arranged in a ring array, and the inner circular surface of the drive wheel is provided with a plurality of grooves arranged in a ring array. The protrusions on the drive shaft are engaged in the grooves of the drive wheel and do not interfere with the rotation of the drive wheel when the drive wheel moves laterally.

[0009] In at least some embodiments, the drive roller is frustoconical, and the drive shaft translates to the conical edge of the drive roller.

[0010] In at least some embodiments, both the drive wheel and the drive roller are made of a material with a high coefficient of friction.

[0011] In at least some embodiments, the locking assembly includes a brake seat, a gear, and a worm gear. A groove is formed on the core-shooting sand casting platform. Two brake seats are provided and slidably mounted in the groove of the core-shooting sand casting platform in a mirror image. A toothed plate is fixedly mounted on the bottom of the core-shooting sand casting platform. The gear is rotatably mounted on the bottom of the groove of the core-shooting sand casting platform. The forward and reverse rotation of the gear, through meshing with the toothed plate, causes the two brake seats to move closer or further apart. A worm gear is fixedly mounted on the shaft of the gear. The worm gear is rotatably mounted on the core-shooting sand casting platform and meshes with the worm gear. A friction block is fixedly mounted on the brake seat for clamping and braking the coupling.

[0012] In at least some embodiments, the arc-shaped end of the friction block is provided with a groove and a brake pin is slidably installed in the groove. A high-strength arc-shaped spring is fixedly installed between the brake pin and the two end walls of the arc-shaped groove of the friction block. The outer circular surface of the coupling is provided with a plurality of brake holes in a ring array. The brake pin is inserted into the brake hole and assists in braking under the elastic force of the high-strength arc-shaped spring.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: In this invention, the torque adaptive adjustment capability is achieved through the friction transmission structure of the frustum-shaped transmission roller 403 and the axially adjustable transmission wheel 406, realizing stepless torque adjustment. Compared with the fixed torque of the traditional core shooting machine, it ensures the stability of sand turning and pouring during the sand casting process for different sizes of sand molds. Moreover, compared with the traditional gear gearbox, it eliminates the complex speed change mechanism, reduces manufacturing costs, and avoids mechanical wear caused by frequent gear shifting.

[0014] The system features a dual-locking safety mechanism, combining friction braking with a mechanical pin. The friction block 506 provides a constant clamping force through a worm gear self-locking structure (worm 503 plus worm wheel 505), preventing accidental loosening caused by hydraulic leakage. The brake pin 507 automatically engages with the brake hole 301 of the coupling 3 under the action of a high-strength arc spring, forming a mechanical interlock. This effectively resists the inertial impact when heavy molds are overturned. The dual protection significantly reduces the risk of equipment overturning, making it especially suitable for large molds with a large tonnage.

[0015] 3. Highly efficient collaborative operation capability: The transverse hydraulic cylinder 202 drives the transverse table 201 to achieve rapid mold alignment, and the tilting hydraulic cylinder 207 completes a precise 90-degree tilting through the linkage mechanism. The dual tilting function design facilitates sand pouring and demolding. Attached Figure Description

[0016] Figure 1 This utility model provides an overall three-dimensional schematic diagram of a mold flipping mechanism; Figure 2 This utility model provides a structural schematic diagram of a reversing frame in a mold flipping mechanism; Figure 3 This utility model provides a connection diagram of the coupling and torque adjustment assembly in a mold flipping mechanism; Figure 4 This utility model provides a structural schematic diagram of the braking component in a mold flipping mechanism; Figure 5 This utility model provides a schematic diagram of the structure of the friction block in a mold flipping mechanism.

[0017] Legend: 1. Core shooting sand casting table; 2. Tilting frame; 201. Transverse moving table; 202. Transverse moving hydraulic cylinder; 203. Fixed mold mounting base; 204. Mold mounting frame; 205. Moving mold mounting base; 206. Connecting rod; 207. Tilting hydraulic cylinder; 3. Coupling; 301. Brake hole; 4. Torque adjustment assembly; 401. Adjusting seat; 402. Transmission seat; 403. Transmission roller; 404. Transmission shaft; 405. Lead screw; 406. Transmission wheel; 5. Locking assembly; 501. Brake seat; 502. Gear; 503. Worm; 504. Gear plate; 505. Worm wheel; 506. Friction block; 507. Brake pin. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Implementation examples, based on Figures 1-5 The present invention provides a mold flipping mechanism including a core-shooting sand casting table 1, a flipping frame 2, and a coupling 3. Roller bearing seats are symmetrically fixedly installed on the top of the core-shooting sand casting table 1. The flipping frame 2 is rotatably installed between the two bearing seats. A transverse platform 201 is slidably installed on the flipping frame 2. A transverse hydraulic cylinder 202 and a fixed mold mounting seat 203 are respectively fixedly installed on the inner two side end walls of the flipping frame 2. The coupling 3 is fixedly installed at one end of the shaft of the flipping frame 2. The telescopic end of the transverse hydraulic cylinder 202 is fixedly connected to the transverse platform 201. A mold mounting bracket 204 is rotatably mounted on the moving platform 201. A moving mold mounting base 205 is mounted on the mold mounting bracket 204 at the same horizontal line as the fixed mold mounting base 203. A connecting rod 206 is fixedly welded to one end of the mold mounting bracket 204. A tilting hydraulic cylinder 207 is rotatably mounted between the moving platform 201 and the connecting rod 206. When the tilting hydraulic cylinder 207 extends to its longest length, it drives the moving mold mounting base 205 to rotate 90 degrees clockwise. It also includes a torque adjustment component 4 mounted on the core injection sand casting table 1 and a locking component 5 mounted on the core injection sand casting table 1. In the pre-sand casting stage, sand casting molds are installed on the fixed mold mounting base 203 and the moving mold mounting base 205 respectively. After installation, the horizontal hydraulic cylinder 202 extends to push the horizontal moving platform 201 to move horizontally. The horizontal moving platform 201 drives the moving mold mounting base 205 to move horizontally so that the two molds close. Sand is injected through the core and into the core hole at the top of the mold to form sand. After forming, the flipping frame 2 flips 180 degrees so that the core hole at the top of the mold faces down and the excess sand is poured out. After pouring out, it flips back to its original position. At the same time, the horizontal hydraulic rod shortens to reset the horizontal moving platform 201 to complete demolding. The formed sand mold will be embedded in the moving mold. At this time, the flipping hydraulic cylinder 207 extends to rotate the moving mold 90 degrees clockwise. At this time, the exposed end of the sand mold faces up, making it easy to remove the sand mold.

[0021] The torque adjustment assembly 4 includes an adjustment seat 401, a transmission seat 402, and a transmission roller 403. The adjustment seat 401 is fixedly installed on one side of the top of the core-shooting sand casting table 1. A transmission shaft 404 and a lead screw 405 are rotatably installed on the adjustment seat 401. A transmission motor for driving the transmission shaft 404 to rotate is fixedly installed at one end of the adjustment seat 401. A handwheel for rotating is fixedly welded to one end of the lead screw 405. The transmission seat 402 is threadedly connected to the lead screw 405, and the rotation of the lead screw 405 drives the transmission seat 402 to move laterally. A transmission wheel 406 is rotatably installed on the transmission seat 402 and is sleeved on the transmission shaft 404. The shaft of the transmission roller 403 is fixedly installed at one end of the coupling 3. The surface of the transmission wheel 406 is in close contact with the surface of the transmission roller 403. The transmission roller 403 is frustoconical. The transmission shaft 404 and the conical edge of the transmission roller 403 move in translation. The operator rotates the handwheel to drive the lead screw 405 to rotate, causing the transmission seat 402 to move laterally. The transmission wheel 406 on the transmission seat 402 slides axially, and the contact position between the transmission wheel 406 and the conical surface of the frustum-shaped transmission roller 403 changes with the lateral movement. At this time, the transmission ratio between the transmission shaft 404 and the coupling 3 also changes. Specifically, the closer the transmission wheel 406 is to the coupling 3, the greater the transmission ratio between the transmission shaft 404 and the coupling 3, that is, the greater the torque. The drive shaft 404 has multiple protruding strips arranged in a ring array, and the inner circular surface of the drive wheel 406 has multiple grooves arranged in a ring array. The protruding strips on the drive shaft 404 are engaged in the grooves of the drive wheel 406 and do not interfere with the rotation of the drive wheel 406 when the drive wheel 406 moves laterally. During the sliding process, the protruding strips are always embedded in the grooves to ensure power transmission.

[0022] Both the drive wheel 406 and the drive roller 403 are made of materials with a high coefficient of friction. The drive shaft 404 is driven by a drive motor. Friction transmission is achieved through the drive wheel 406 and the drive roller 403, which are made of materials with a high coefficient of friction (such as polyurethane rubber). Axial friction is suppressed to ensure smooth adjustment.

[0023] The locking assembly 5 includes a brake seat 501, a gear 502, and a worm 503. A groove is provided on the core casting table 1. Two brake seats 501 are provided and are slidably installed in the groove of the core casting table 1 in a mirror image. A toothed plate 504 is fixedly installed at the bottom of the core casting table 1. The gear 502 is rotatably installed at the bottom of the groove of the core casting table 1. The forward and reverse rotation of the gear 502 drives the two brake seats 501 to move closer or further apart through meshing with the toothed plate 504. A worm wheel 505 is fixedly mounted on the shaft of the gear 502. The worm 503 is rotatably installed on the core casting table 1 and meshes with the worm wheel 505. A brake motor for driving the worm 503 to rotate is fixedly installed on the core casting table 1. A friction block 506 is fixedly installed on the brake seat 501 for clamping and braking the coupling 3. The brake motor drives the worm gear 503 to rotate, which in turn drives the worm wheel 505 and the coaxial gear 502 to rotate. The gear 502 meshes with the fixed gear plate 504, pushing the two brake seats 501 to slide towards each other in the groove of the core casting table 1. The arc-shaped surface of the friction block 506 presses against the outer surface of the coupling 3 to generate friction braking.

[0024] The friction block 506 has a groove on its arc-shaped end, and a brake pin 507 is slidably installed in the groove. High-strength arc springs are fixedly installed between the brake pin 507 and the two end walls of the arc-shaped groove of the friction block 506. The outer surface of the coupling 3 has multiple brake holes 301 arranged in a ring array. The brake pin 507 is inserted into the brake hole 301 and assists in braking under the elastic force of the high-strength arc spring. The brake pin 507 is squeezed by the high-strength arc spring in the arc-shaped groove and automatically inserted into the brake hole 301 of the coupling 3. The double locking mechanism (friction braking + mechanical locking of the pin) prevents the mechanism from rotating. The self-locking characteristics of the worm gear 505 and worm 503 ensure that the locked state is maintained.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A mold flipping mechanism, comprising a core-shooting sand casting table (1), a flipping frame (2), and a coupling (3), characterized in that: The top of the core-shooting sand casting table (1) is symmetrically fixed with roller bearing seats. The tilting frame (2) is rotatably installed between the two bearing seats. A transverse moving platform (201) is slidably installed on the tilting frame (2). A transverse moving hydraulic cylinder (202) and a fixed mold mounting seat (203) are fixedly installed on the inner two side end walls of the tilting frame (2), respectively. The coupling (3) is fixedly installed at one end of the shaft of the tilting frame (2). The system also includes: Torque adjustment assembly (4) installed on the core-shooting sand-casting table (1); Locking assembly (5) installed on the core-shooting sand-casting table (1).

2. The mold flipping mechanism according to claim 1, characterized in that: The telescopic end of the transverse hydraulic cylinder (202) is fixedly connected to the transverse platform (201). A mold mounting frame (204) is rotatably mounted on the transverse platform (201). A moving mold mounting seat (205) is mounted on the mold mounting frame (204) at the same horizontal line as the fixed mold mounting seat (203). A connecting rod (206) is fixedly welded to one end of the mold mounting frame (204). A tilting hydraulic cylinder (207) is rotatably mounted between the transverse platform (201) and the connecting rod (206). When the tilting hydraulic cylinder (207) extends to its maximum length, it drives the moving mold mounting seat (205) to rotate 90 degrees clockwise.

3. The mold flipping mechanism according to claim 1, characterized in that: The torque adjustment assembly (4) includes an adjustment seat (401), a transmission seat (402), and a transmission roller (403). The adjustment seat (401) is fixedly installed on one side of the top of the core casting table (1). A transmission shaft (404) and a lead screw (405) are rotatably installed on the adjustment seat (401). The transmission seat (402) is threadedly connected to the lead screw (405), and the rotation of the lead screw (405) drives the transmission seat (402) to move laterally. A transmission wheel (406) is rotatably installed on the transmission seat (402), and the transmission wheel (406) is sleeved on the transmission shaft (404). The shaft of the transmission roller (403) is fixedly installed at one end of the coupling (3), and the surface of the transmission wheel (406) is in close contact with the surface of the transmission roller (403).

4. The mold flipping mechanism according to claim 3, characterized in that: The drive shaft (404) has multiple protrusions arranged in a ring array, and the inner surface of the drive wheel (406) has multiple grooves arranged in a ring array. The protrusions on the drive shaft (404) are engaged in the grooves of the drive wheel (406) and do not interfere with the rotation of the drive wheel (406) when the drive wheel (406) moves laterally.

5. A mold flipping mechanism according to claim 4, characterized in that: The transmission roller (403) is frustoconical, and the transmission shaft (404) translates to the conical edge of the transmission roller (403).

6. A mold flipping mechanism according to claim 5, characterized in that: Both the drive wheel (406) and the drive roller (403) are made of materials with a high coefficient of friction.

7. The mold flipping mechanism according to claim 1, characterized in that: The locking assembly (5) includes a brake seat (501), a gear (502), and a worm (503). The core casting table (1) has a groove. Two brake seats (501) are provided and are slidably installed in the groove of the core casting table (1) in a mirror image. A toothed plate (504) is fixedly installed at the bottom of the core casting table (1). The gear (502) is rotatably installed at the bottom of the groove of the core casting table (1). The gear (502) rotates in both directions and drives the two brake seats (501) to move closer or further apart through meshing with the toothed plate (504). A worm wheel (505) is fixedly mounted on the shaft of the gear (502). The worm (503) is rotatably installed on the core casting table (1) and meshes with the worm wheel (505). A friction block (506) is fixedly installed on the brake seat (501) for clamping and braking the coupling (3).

8. A mold flipping mechanism according to claim 7, characterized in that: The friction block (506) has a groove on its arc surface and a brake pin (507) is slidably installed in the groove. A high-strength arc spring is fixedly installed between the brake pin (507) and the two end walls of the arc groove of the friction block (506). The outer surface of the coupling (3) has multiple brake holes (301) arranged in a ring array. The brake pin (507) is inserted into the brake hole (301) and assists in braking under the elastic force of the high-strength arc spring.

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