A two-car three-position die changing system

Abstract

This utility model discloses a two-car, three-position mold-changing system, relating to the field of refrigerator manufacturing technology. The system includes a guide rail and molds. A mold-changing carriage is mounted on the guide rail, and a traveling mechanism is provided between the two carriages. Each carriage has a housing containing a lead screw, a moving frame on each lead screw, and a lifting cylinder on each moving frame. Each lifting cylinder has a pin at its end. A traction plate with slots is mounted on the mold. Rotating the lead screw moves the moving frame, causing the pins to insert into the corresponding slots, facilitating the movement of the old and new molds. This allows for automatic mold disassembly and installation. The gears and toothed plates facilitate the displacement of the two carriages, while support wheels and side guide wheels allow for easy adjustment of the mold position. This device prepares for mold changes during press operation, reducing downtime, improving production efficiency, lowering labor costs, and preventing collisions between the mold and the press.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator manufacturing technology, specifically to a two-car, three-position mold changing system. Background Technology

[0002] Refrigerator liners are typically manufactured using vacuum forming. During the forming process, when the heated sheet material reaches the forming station, the lifting platform rises, and the hydraulic cylinder drives the middle mold frame to move downwards, pressing down on the sheet material. Subsequently, the forming mold moves upwards to its position, and the upper mold frame moves downwards to assist in forming. This process requires a press to provide pressure to ensure that the sheet material can fit tightly against the mold, forming the desired shape of the liner.

[0003] Press mold changing is a key link in the production of refrigerator liners, which involves "production on demand, processing in sequence, and ensuring quality". Its core objective is to make the press adaptable to different product specifications and different processing procedures, while also dealing with mold wear and process adjustments, and ultimately achieving efficient and precise production.

[0004] The weight of the mold used for mold changing in the production of refrigerator liners varies greatly depending on the size, material, and structure of the mold, but it is generally between several hundred kilograms and several tons. In the current technology, when changing molds on the press, a forklift is usually used to remove the mold from the press, and then a new mold is transported for replacement. Finally, the mold is manually adjusted into place. However, due to the large weight of the mold and the large size and limited precision of the forklift, the position needs to be constantly adjusted before the mold can be placed into the press. During this time, the press needs to be stopped and wait, which greatly reduces the efficiency of mold changing, increases labor costs, and is also prone to collisions between the mold and the press. Utility Model Content

[0005] The purpose of this invention is to provide a two-vehicle, three-position mold changing system to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a two-car, three-position mold changing system, including a guide rail and a mold. Two mold changing carts for carrying the mold are arranged on the guide rail. The two mold changing carts are fixedly connected, and a traveling mechanism is arranged between the two mold changing carts. Each mold changing cart is fixedly equipped with a housing. Each housing is rotatably equipped with a lead screw. Each lead screw is threadedly connected to a moving frame. Each moving frame is fixedly equipped with a lifting cylinder. The piston of each lifting cylinder is fixedly equipped with a pin. A traction plate is fixedly equipped on the mold. The traction plate has a slot adapted to the pin.

[0007] Preferably, two guide rods are fixedly installed inside the chassis, and both guide rods are slidably connected to the movable frame. Each movable frame is fixedly installed with a fixing plate, and each pin is slidably connected to the corresponding fixing plate.

[0008] Preferably, a second servo motor is fixedly installed inside the chassis, a first synchronous pulley is fixedly installed at the output end of the second servo motor, a second synchronous pulley is fixedly installed at the end of the lead screw near the second servo motor, and a synchronous belt is provided for transmission between the first synchronous pulley and the second synchronous pulley.

[0009] Preferably, the walking mechanism includes a connecting frame fixedly disposed between two mold changing carriages, a toothed plate fixedly disposed on the inner side wall of the guide rail, a first servo motor fixedly disposed on the connecting frame, and a gear meshing with the toothed plate fixedly disposed at the output end of the first servo motor.

[0010] Preferably, each mold changing vehicle is fixedly provided with a support frame on both sides, and each support frame is provided with a first limit pin and a second limit pin at both ends.

[0011] Preferably, each of the support frames is rotatably equipped with multiple support wheels.

[0012] Preferably, each of the support frames is provided with multiple side guide wheels on both sides.

[0013] In the above technical solution, this utility model provides a two-car, three-position mold changing system, which has the following beneficial effects: by rotating the lead screw to drive the moving frame to move, the pin is inserted into the corresponding slot, which facilitates the movement of the old and new molds, thereby facilitating the automatic disassembly and installation of the molds. The gear and tooth plate cooperation facilitates the displacement of the two mold changing cars. The support rollers and side guide rollers can facilitate the adjustment of the mold position. This device prepares for mold changing when the press is working, which can shorten the downtime of mold changing, improve production efficiency, reduce labor costs, and avoid collisions between the mold and the press. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the guide rail provided in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the toothed plate provided in an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the bottom structure of the guide rail provided in an embodiment of the present utility model;

[0019] Figure 5 Provided for the embodiments of this utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0020] Figure 6 Provided for the embodiments of this utility model Figure 2 Enlarged view of the structure at point B;

[0021] Figure 7 Provided for the embodiments of this utility model Figure 2 Enlarged view of the structure at point C.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Mold; 2. Guide rail; 3. Mold changing carriage; 4. Connecting frame; 5. Gear plate; 6. Gear; 7. First servo motor; 8. Chassis; 9. Second servo motor; 10. First synchronous pulley; 11. Second synchronous pulley; 12. Synchronous belt; 13. Lead screw; 14. Guide rod; 15. Moving frame; 16. Fixed plate; 17. Lifting cylinder; 18. Pin; 19. Connecting plate; 20. Slot; 21. Support frame; 22. First limit pin; 23. Second limit pin; 24. Side guide wheel; 25. Supporting wheel. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] Please see Figure 1-7 A two-car, three-position mold-changing system, the technical solution of this utility model includes a guide rail 2 and a mold 1. Two mold-changing carts 3 for carrying the mold 1 are mounted on the guide rail 2, the two carts 3 are fixedly connected, and a traveling mechanism is provided between the two carts 3. Each mold-changing cart 3 is fixedly mounted with a housing 8, and each housing 8 has a rotatable lead screw 13. Each lead screw 13 is threadedly connected to a moving frame 15, and each moving frame 15 is fixedly mounted with a lifting cylinder 17. The piston end of each lifting cylinder 17 is fixedly mounted with a pin 18. A traction plate 19 is fixedly mounted on the mold 1, and the traction plate 19 has a slot 20 that matches the pin 18. The guide rail 2 is fixedly mounted on the mold-changing station of the press and is perpendicular to the direction in which the mold 1 moves towards the press. Wheels that roll within the guide rail 2 are mounted on the bottom of each of the two mold-changing carts 3. The lifting cylinder 17 controls the up-and-down movement of the pin 18. Figure 2As shown, when changing mold 1, the lifting cylinder 17 moves the pin 18 down, and then the screw 13 is rotated to move the moving frame 15 from the end away from mold 1 to the end close to mold 1 (Note: The two sets of moving frames 15, lifting cylinder 17 and other components on the screw 13 in the figure are only used to indicate the positional relationship. In actual use, there is only one set of moving frames 15 and other components on the screw 13). At this time, the pin 18 is directly below the slot 20 of the traction plate 19 of the mold 1 to be replaced in the press. The pin 18 moves up and inserts into the slot 20. The screw 13 is reversed, and the screw 13 pulls the mold 1 in the press out to the mold changing carriage 3 on the right side through the pin. The mold changing carriage 3 on the left side is placed with the new mold 1. Then the traveling mechanism moves both mold changing carriages 3 to the right at the same time, so that the new mold 1 is aligned with the press. Then the screw 13 on the left carriage is driven to rotate, so that the mold 1 moves towards the press, thereby completing the mold change. Then, when the press is working, the replaced mold 1 is removed and the new mold 1 is prevented from entering.

[0026] Specifically, two guide rods 14 are fixedly installed inside the chassis 8. Both guide rods 14 are slidably connected to the moving frame 15. Each moving frame 15 is fixedly installed with a fixed plate 16. Each pin 18 is slidably connected to the corresponding fixed plate 16. Each fixed plate 16 has a pin 18 sliding at both ends. The bottom of the pin 18 has a lifting cylinder 17. The bottom of the mold 1 and the traction plate 19 both have slots 20. The cooperation between the two slots 20 and the pins 18 can push and pull the mold 1 more stably. The guide rods 14 guide and limit the moving frame 15.

[0027] Specifically, a second servo motor 9 is fixedly installed inside the chassis 8. A first synchronous pulley 10 is fixedly installed at the output end of the second servo motor 9. A second synchronous pulley 11 is fixedly installed at the end of the lead screw 13 near the second servo motor 9. A synchronous belt 12 is provided for transmission between the first synchronous pulley 10 and the second synchronous pulley 11. The second servo motor 9 is fixedly installed below the bottom plate of the mold changing car 3, which can make full use of the space of the mold changing car 3. The output end of the second servo motor 9 drives the lead screw 13 to rotate through the first synchronous pulley 10, the synchronous belt 12, and the second synchronous pulley 11.

[0028] Specifically, the walking mechanism includes a connecting frame 4 fixedly installed between two mold changing carriages 3, a toothed plate 5 fixedly installed on the inner wall of the guide rail 2, a first servo motor 7 fixedly installed on the connecting frame 4, and a gear 6 meshing with the toothed plate 5 fixedly installed at the output end of the first servo motor 7; the toothed plate 5 is fixedly installed on the inner wall of one side of the guide rail 2, and the gear 6 meshes with the toothed plate 5. When it is necessary to move the two mold changing carriages 3, the first servo motor 7 drives the gear 6 to rotate, thereby causing the connecting frame 4 to drive the two carriages to move simultaneously on the guide rail 2, which facilitates the replacement of the mold 1 to be installed with the mold 1 to be removed.

[0029] Specifically, each mold-changing carriage 3 is fixedly equipped with a support frame 21 on both sides, and each support frame 21 is respectively equipped with a first limiting pin 22 and a second limiting pin 23 at both ends; for example Figure 2 As shown, the first limiting pin 22 is located on the side of the support frame 21 away from the press, and the second limiting pin 23 is located on the side of the support plate close to the press. The first limiting pin 22 is driven to reset by a spring, and the second limiting pin 23 is driven to rise and fall by a cylinder. When the mold 1 is pulled out of the press, the second limiting pin 23 descends through the cylinder. During the process of removing the mold 1 from the press, the mold 1 is limited by the first limiting pin 22. When the mold 1 to be replaced is placed on the mold changing cart 3, the mold 1 is placed on the support frames 21 on both sides directly using a forklift or lifting mechanism, and the mold 1 is limited by the second limiting pin 23.

[0030] Specifically, each support frame 21 is equipped with multiple supporting wheels 25 that rotate around; the supporting wheels 25 support the mold 1, making it easier to move the mold 1, facilitating mold changes, and preventing friction between the mold 1 and the support frame 21.

[0031] Specifically, each support frame 21 has multiple side guide wheels 24 rotatably mounted on both sides. The side guide wheels 24 guide the movement of the mold 1, preventing friction between the mold 1 and the side wall of the support frame 21. The side guide wheels 24, the first limiting pin 22, and the second limiting pin 23 facilitate the adjustment of the position of the mold 1, making it easy to align the slot 20 on the mold 1 with the pin 18. The mold 1 is placed between the two rows of side guide wheels 24 on both sides of the mold changing carriage 3, with a certain distance between the end of the mold 1 and the second limiting pin 23. At this time, the first limiting pin... Pin 22 is pressed down, and then the mold 1 is pushed toward the press so that the end of the mold 1 abuts against the raised second limit pin 23. At this time, the top of the first limit pin 22 separates from the bottom of the mold 1, and the first limit pin 22 moves up, restricting the mold 1 on the two support frames 21 to prevent the mold 1 from shifting when the mold changing carriage 3 moves. This device also includes a controller. The first servo motor 7, the second servo motor 9, the lifting cylinder 17, and the cylinder are all connected to the controller signal. The controller controls the operation of each component. This is existing technology and will not be described in detail.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A two-vehicle, three-position mold changing system, comprising a guide rail (2) and a mold (1), characterized in that, The guide rail (2) is provided with two mold changing carriages (3) for carrying the mold (1), the two mold changing carriages (3) are fixedly connected, and a walking mechanism is provided between the two mold changing carriages (3); Each of the mold changing carts (3) is fixedly equipped with a housing (8), each of the housings (8) is rotatably equipped with a lead screw (13), each of the lead screws (13) is threadedly connected with a moving frame (15), each of the moving frames (15) is fixedly equipped with a lifting cylinder (17), each of the pistons of the lifting cylinders (17) is fixedly equipped with a pin (18), each of the molds (1) is fixedly equipped with a traction plate (19), and the traction plate (19) is provided with a slot (20) that matches the pin (18).

2. The two-vehicle three-position mold changing system according to claim 1, characterized in that, Two guide rods (14) are fixedly installed inside the chassis (8). Both guide rods (14) are slidably connected to the movable frame (15). Each movable frame (15) is fixedly provided with a fixing plate (16). Each pin (18) is slidably connected to the corresponding fixing plate (16).

3. The two-vehicle three-position mold changing system according to claim 1, characterized in that, The chassis (8) is fixedly equipped with a second servo motor (9), and the output end of the second servo motor (9) is fixedly equipped with a first synchronous pulley (10). The end of the lead screw (13) near the second servo motor (9) is fixedly equipped with a second synchronous pulley (11), and a synchronous belt (12) is provided between the first synchronous pulley (10) and the second synchronous pulley (11).

4. A two-vehicle, three-position mold changing system according to claim 1, characterized in that, The walking mechanism includes a connecting frame (4) fixedly installed between two mold changing carriages (3), a toothed plate (5) fixedly installed on the inner side wall of the guide rail (2), a first servo motor (7) fixedly installed on the connecting frame (4), and a gear (6) meshing with the toothed plate (5) fixedly installed at the output end of the first servo motor (7).

5. A two-vehicle, three-position mold changing system according to claim 1, characterized in that, Each mold changing vehicle (3) is fixedly provided with a support frame (21) on both sides, and each support frame (21) is provided with a first limiting pin (22) and a second limiting pin (23) at both ends.

6. A two-vehicle, three-position mold changing system according to claim 5, characterized in that, Each of the aforementioned support frames (21) is rotatably equipped with multiple support wheels (25).

7. A two-vehicle, three-position mold changing system according to claim 5, characterized in that, Each of the support frames (21) has multiple side guide wheels (24) rotatably mounted on both sides.

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