Roller changing device of casting machine

Abstract

The utility model discloses a roller changing device of a casting machine, which comprises a first moving frame and a second moving frame which form a device frame, and the lower end of each of the first moving frame and the second moving frame is provided with a clamping component convenient for clamping a roller; the clamping assembly comprises a plurality of fixing blocks, the outer sides of the two-way screws are rotationally connected with two symmetrically-distributed T-shaped blocks, the positions for taking out the rollers are arranged at the upper ends of the rollers, the rollers at different positions can be taken out conveniently, the height of the clamping assembly is controlled through the hydraulic telescopic rod, and the device can move before and after being dismantled conveniently; meanwhile, the device can be suitable for dismounting rollers with different heights, a motor drives a bidirectional screw rod to rotate, the bidirectional screw rod and T-shaped blocks generate threaded motion, and the T-shaped blocks on the two sides are controlled to clamp and loosen, so that the device can be suitable for dismounting rollers with different diameters; the sliding groove plays a role in guiding and limiting the T-shaped block.

Description

Technical Field

[0001] The utility model relates to the technical field of roller changing devices, in particular to a roller changing device for a casting machine. Background Art

[0002] Casting machine is a commonly used plastic processing equipment. It heats and melts the plastic raw materials under high temperature and high pressure, and extrudes the molten plastic through a specific shape die through the extrusion of the mold or extruder head to form a continuous plastic product. Casting machine is widely used in the production process of plastic products such as plastic film, plate, sheet, pipe and profile. For example, in the common plastic film production process, the casting machine extrude the molten plastic into a film with a certain width and thickness, and then after cooling and stretching, a flat plastic film product is obtained.

[0003] The prior art provides a roller changing device for a PVC sheet calender (Announcement No.: CN211891667U), which includes a base, both sides of the top of the base are fixedly connected to a box body, the tops of the two boxes are fixedly connected to telescopic rods, a box body is fixedly connected between the tops of the two telescopic rods, the bottom of the inner wall of the box body is fixedly connected to a fixed seat, a transmission motor is arranged on the fixed seat, the output shaft of the transmission motor is fixedly connected to a rotating rod, the surface of the rotating rod is fixedly connected to a first gear, the bottom of the inner wall of the box body is fixedly connected to a bracket, the top of the bracket is fixedly connected to a cross plate, and the surface of the cross bar is rotatably connected to a second gear. The roller changing device for a PVC sheet calender provided by the utility model can adjust the height as needed, and the two baffles can determine the movement direction of the push plate, which is convenient for installation and disassembly, reduces the waste of manpower, material resources and financial resources, and reduces the time for manual installation.

[0004] However, the device still has the following defects:

[0005] When the device is in use, the device supports the roller at the lower end of the roller and removes the roller. However, when the number of rollers is large, the device cannot remove the middle roller and needs to be removed from one end in turn. At the same time, the lower end space of some device rollers is small, and the use of the device is limited. Therefore, we need to propose a roller changing device for a cast film machine. Utility Model Content

[0006] The utility model aims to provide a roller changing device for a casting machine, which can clamp and remove the roller at the upper end of the roller and can remove the rollers at different positions to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A roller changing device for a casting machine comprises a first movable frame and a second movable frame constituting a frame of the device, wherein the lower ends of the first movable frame and the second movable frame are both provided with a clamping assembly for clamping the roller;

[0009] The clamping assembly includes a plurality of fixed blocks, each of which is rotatably connected to a bidirectional screw rod inside, each of which has one end passing through the fixed block and is fixedly connected to a motor, each of which is rotatably connected to two symmetrically distributed T-shaped blocks outside, each of which is slidably connected to the plurality of fixed blocks respectively, each of which is provided with two symmetrically distributed sliding grooves inside, each of which is slidably connected to the T-shaped block, and a limiting assembly is provided at the lower end of each of the T-shaped blocks for further limiting the roller.

[0010] Preferably, the outer side of the first mobile frame is in contact with the second mobile frame, and the first mobile frame and the second mobile frame are jointly provided with an adjustment component for adjusting the distance between the first mobile frame and the second mobile frame.

[0011] Preferably, the adjustment component includes a connecting plate fixedly mounted on the side wall of the second movable frame, a plurality of evenly distributed limit holes are opened inside the connecting plate, the limit holes are internally slidably connected to a limit frame, the limit frame is slidably connected to the first movable frame, and a spring is sleeved on the outer side of the limit frame.

[0012] Preferably, the limiting frame is composed of a straight rod and a fixed ring, the straight rod is slidably connected to the limiting hole, and the straight rod and the fixed ring are both slidably connected to the first movable frame.

[0013] Preferably, two symmetrically distributed mounting plates are fixedly connected to the side walls of the first mobile frame and the second mobile frame, a plurality of the mounting plates are fixedly connected to the lower ends of the plurality of hydraulic telescopic rods, and the output ends of the plurality of hydraulic telescopic rods are respectively fixedly connected to a plurality of fixed blocks.

[0014] Preferably, the limiting assembly includes a plurality of L-rods respectively fixedly mounted on the lower ends of a plurality of T-shaped blocks, the L-rods are fixedly connected to elastic plates, the L-rods are provided with air cavities, the air cavities are provided with a plurality of evenly distributed tension springs, the plurality of L-rods are fixedly connected to a plurality of evenly distributed fixed tubes, the plurality of fixed tubes are slidably connected to pistons, a limiting rod is fixedly connected to the side wall of the piston, and the limiting rod is slidably connected to the fixed tube.

[0015] Preferably, the plurality of tension springs are distributed correspondingly to the plurality of pistons, one end of the plurality of tension springs is fixedly installed inside the air cavity, and the other ends of the plurality of tension springs are respectively fixedly installed with the plurality of pistons.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model arranges the position of the taking-out roller at the upper end of the roller, so as to facilitate the taking-out of rollers at different positions; the hydraulic telescopic rod controls the height of the clamping assembly, so as to facilitate the movement of the device before and after removal, and at the same time enables the device to be suitable for the removal of rollers at different heights; the motor drives the bidirectional screw to rotate, and threaded movement occurs between the bidirectional screw and the T-shaped block, so as to control the T-shaped blocks on both sides to be clamped and loosened, so that the device can be suitable for the removal of rollers with different diameters; when the T-shaped block moves, the slide groove guides and limits the T-shaped block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model when it is working;

[0020] Figure 3 It is a schematic diagram of the partial internal structure of the first mobile frame and the second mobile frame of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the limit assembly of the utility model.

[0023] In the figure: 1. first movable frame; 2. second movable frame; 3. adjustment assembly; 31. connecting plate; 32. limiting hole; 33. limiting frame; 34. spring; 4. mounting plate; 5. hydraulic telescopic rod; 6. clamping assembly; 61. fixing block; 62. bidirectional screw; 63. motor; 64. T-block; 65. slideway; 7. limiting assembly; 71. L rod; 72. elastic plate; 73. air cavity; 74. tension spring; 75. fixing tube; 76. piston; 77. limiting rod; 8. cast iron machine body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] A roller changing device for a casting machine comprises a first movable frame 1 and a second movable frame 2 constituting a frame of the device, wherein the lower ends of the first movable frame 1 and the second movable frame 2 are both provided with a clamping assembly 6 for clamping the roller;

[0027] The clamping assembly 6 includes a plurality of fixed blocks 61, each of which is rotatably connected to a bidirectional screw 62 inside, one end of each of which passes through the fixed block 61 and is fixedly connected to a motor 63, and the outer sides of each of the bidirectional screws 62 are rotatably connected to two symmetrically distributed T-blocks 64, each of which is slidably connected to the plurality of fixed blocks 61, and the interior of each of the plurality of fixed blocks 61 is provided with two symmetrically distributed slide grooves 65, each of which is slidably connected to the T-block 64, and the lower ends of the plurality of T-blocks 64 are provided with a limiting assembly 7 for further limiting the roller.

[0028] The outer side of the first mobile frame 1 is abutted against the second mobile frame 2 , and the first mobile frame 1 and the second mobile frame 2 are jointly provided with an adjustment component 3 for adjusting the distance between the first mobile frame 1 and the second mobile frame 2 .

[0029] Through the coordination of the structures of the first mobile frame 1 and the second mobile frame 2, the first mobile frame 1 and the second mobile frame 2 form the frame of the device. Meanwhile, moving wheels are provided at the lower ends of the first mobile frame 1 and the second mobile frame 2, which facilitates the movement of the device and solves the technical problem that the device is inconvenient to move.

[0030] The adjustment component 3 includes a connecting plate 31 fixedly mounted on the side wall of the second movable frame 2, a plurality of evenly distributed limit holes 32 are opened inside the connecting plate 31, a limit frame 33 is slidably connected inside the limit holes 32, the limit frame 33 is slidably connected to the first movable frame 1, and a spring 34 is sleeved on the outer side of the limit frame 33.

[0031] By cooperating with structures such as the connecting plate 31 and the limiting hole 32, the limiting frame 33 is pulled out upward, and the spring 34 is forced to contract. When the limiting frame 33 moves out of the limiting hole 32, the limiting of the connecting plate 31 is released, the first movable frame 1 and the second movable frame 2 are moved, and the distance between the first movable frame 1 and the second movable frame 2 is adjusted, so that the device is suitable for the removal of rollers of different lengths. When the limiting frame 33 is loosened, under the elastic force of the spring 34, the limiting frame 33 is inserted into the inside of the limiting hole 32, the connecting plate 31 is limited, and the first movable frame 1 and the second movable frame 2 are fixed. The technical effect solves the technical problem that the device cannot be used for the removal of rollers of different lengths.

[0032] The limiting frame 33 is composed of a straight rod and a fixed ring. The straight rod is slidably connected to the limiting hole 32 , and both the straight rod and the fixed ring are slidably connected to the first movable frame 1 .

[0033] Through the cooperation of the straight rod and the fixed ring structure, when the straight rod is pulled out, the fixed ring will synchronously slide inside the first movable frame 1, thereby reducing the wear on the straight rod and solving the technical problem that the straight rod is easily worn during use. This design allows the limit frame 33 to be quickly installed and disassembled, which is convenient for replacement or adjustment, saving time and labor. Compared with complex mechanical devices, this simple combination can reduce costs while maintaining effective functions. The use of a fixed ring can reduce the direct contact between the first movable frame 1 and the limit frame 33, thereby reducing the risk of wear and damage.

[0034] Two symmetrically distributed mounting plates 4 are fixedly connected to the side walls of the first mobile frame 1 and the second mobile frame 2, and hydraulic telescopic rods 5 are fixedly connected to the lower ends of the plurality of mounting plates 4, and the output ends of the plurality of hydraulic telescopic rods 5 are fixedly connected to the plurality of fixed blocks 61 respectively.

[0035] Through the cooperation of the mounting plate 4 and the hydraulic telescopic rod 5 structure, the technical effect of the mounting plate 4 mounting the hydraulic telescopic rod 5 is achieved, and the technical problem that the hydraulic telescopic rod 5 is inconvenient to install is solved.

[0036] The limiting assembly 7 includes a plurality of L-rods 71 ​​respectively fixedly mounted on the lower ends of a plurality of T-shaped blocks 64, the interiors of the L-rods 71 ​​are fixedly connected with elastic plates 72, the interiors of the L-rods 71 ​​are provided with air cavities 73, the interiors of the air cavities 73 are provided with a plurality of uniformly distributed tension springs 74, the interiors of the plurality of L-rods 71 ​​are fixedly connected with a plurality of uniformly distributed fixed tubes 75, the interiors of the plurality of fixed tubes 75 are slidably connected with pistons 76, the side walls of the pistons 76 are fixedly connected with limiting rods 77, and the limiting rods 77 are slidably connected to the fixing tubes 75.

[0037] Through the cooperation of structures such as the L rod 71 and the elastic plate 72, the L rod 71 limits the lower end of the roller. When the roller presses on the elastic plate 72, gravity causes the elastic plate 72 to deform, and the air pressure inside the air cavity 73 increases. The air pressure drives the piston 76 to slide inside the fixed tube 75, and the tension spring 74 is stretched by the force. The piston 76 drives the limiting rod 77 to be stuck on the roller to limit the roller. When the roller is lowered, the pressure on the elastic plate 72 is reduced, the elastic plate 72 returns to its original state, the pressure inside the air cavity 73 is reduced, and the tension spring 74 uses the pulling force to pull the piston 76 back to the fixed tube 75. This technical effect solves the technical problem of the lack of up and down direction limiting when the roller is raised and lowered.

[0038] The plurality of tension springs 74 are distributed correspondingly to the plurality of pistons 76 , one end of the plurality of tension springs 74 is fixedly installed inside the air cavity 73 , and the other ends of the plurality of tension springs 74 are fixedly installed with the plurality of pistons 76 , respectively.

[0039] Through the cooperation of the tension spring 74 and the piston 76 structure, the technical effect of the tension spring 74 controlling the position of the piston 76 is achieved, and the technical problem that the piston 76 may not be able to return to its original position is solved.

[0040] Working principle: When the utility model is used, the first moving frame 1 and the second moving frame 2 are moved to the position where the roller needs to be removed from the main body 8 of the casting machine, and the hydraulic telescopic rod 5 controls the clamping assembly 6 to descend, and the motor 63 drives the bidirectional screw 62 to rotate, and a threaded movement occurs between the bidirectional screw 62 and the T-shaped block 64, and the T-shaped blocks 64 on both sides are controlled to clamp and release, so that the device can be suitable for the removal of rollers of different diameters. When the T-shaped block 64 moves, the slide groove 65 guides and limits the T-shaped block 64. When the roller presses on the elastic plate 72, gravity causes the elastic plate 72 to deform, and the air pressure inside the air cavity 73 increases. The air pressure drives the piston 76 to slide inside the fixed tube 75, and the tension spring 74 is stretched by force. The piston 76 drives the limiting rod 77 to be stuck on the roller to limit the roller. When the roller is put down, the pressure on the elastic plate 72 is reduced, and the elastic plate 72 returns to its original state. The pressure inside the air cavity 73 is reduced, and the tension spring 74 uses the tension force to pull the piston 76 back to the inside of the fixed tube 75;

[0041] Pull out the limit frame 33 upward, the spring 34 is forced to shrink, and when the limit frame 33 moves out of the limit hole 32, the limit on the connecting plate 31 is released, the first movable frame 1 and the second movable frame 2 are moved, and the distance between the first movable frame 1 and the second movable frame 2 is adjusted so that the device is suitable for the removal of rollers of different degrees. After loosening the limit frame 33, under the elastic force of the spring 34, the limit frame 33 is inserted into the inside of the limit hole 32, the connecting plate 31 is limited, and the first movable frame 1 and the second movable frame 2 are fixed.

[0042] 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 roller changing device for a tape casting machine, characterized in that: include: A first mobile frame (1) and a second mobile frame (2); The lower ends of the first mobile frame (1) and the second mobile frame (2) are both provided with clamping assemblies (6) for facilitating clamping of the rollers; The clamping assembly (6) comprises a plurality of fixed blocks (61), the interiors of the plurality of fixed blocks (61) are rotatably connected with bidirectional screw rods (62), one ends of the plurality of bidirectional screw rods (62) pass through the fixed blocks (61) and are fixedly connected with motors (63), the outer sides of the plurality of bidirectional screw rods (62) are rotatably connected with two symmetrically distributed T-shaped blocks (64), and the plurality of T-shaped blocks (64) are respectively slidably connected with the plurality of fixed blocks (61); Two symmetrically distributed slide grooves (65) are provided inside the plurality of fixed blocks (61), and the two slide grooves (65) are slidably connected to the T-shaped blocks (64). The lower ends of the plurality of T-shaped blocks (64) are provided with limiting components (7) for further limiting the position of the rollers.

2. A roller changing device for a tape casting machine according to claim 1, characterized in that: The outer side of the first mobile frame (1) is in contact with the second mobile frame (2), and the first mobile frame (1) and the second mobile frame (2) are jointly provided with an adjustment component (3) for facilitating adjustment of the distance between the first mobile frame (1) and the second mobile frame (2).

3. A roller changing device for a tape casting machine according to claim 2, characterized in that: The adjustment assembly (3) comprises a connecting plate (31) fixedly mounted on the side wall of the second movable frame (2), a plurality of evenly distributed limiting holes (32) are provided inside the connecting plate (31), a limiting frame (33) is slidably connected inside the limiting holes (32), the limiting frame (33) is slidably connected to the first movable frame (1), and a spring (34) is sleeved on the outer side of the limiting frame (33).

4. A roller changing device for a tape casting machine according to claim 3, characterized in that: The limiting frame (33) is composed of a straight rod and a fixed ring, the straight rod is slidably connected to the limiting hole (32), and the straight rod and the fixed ring are both slidably connected to the first movable frame (1).

5. A roller changing device for a tape casting machine according to claim 3, characterized in that: Two symmetrically distributed mounting plates (4) are fixedly connected to the side walls of the first mobile frame (1) and the second mobile frame (2); the lower ends of the plurality of mounting plates (4) are fixedly connected to hydraulic telescopic rods (5); and the output ends of the plurality of hydraulic telescopic rods (5) are respectively fixedly connected to a plurality of fixed blocks (61).

6. A roller changing device for a tape casting machine according to claim 1, characterized in that: The limiting component (7) comprises: A plurality of L-rods (71) are respectively fixedly mounted on the lower ends of the plurality of T-shaped blocks (64), the interior of each of the L-rods (71) is fixedly connected with an elastic plate (72), an air cavity (73) is provided inside each of the L-rods (71), and a plurality of tension springs (74) are evenly distributed inside each of the air cavities (73); A plurality of evenly distributed fixed tubes (75) are fixedly connected inside the plurality of L-rods (71), a piston (76) is slidably connected inside the plurality of fixed tubes (75), a limiting rod (77) is fixedly connected to the side wall of the piston (76), and the limiting rod (77) is slidably connected to the fixed tube (75).

7. A roller changing device for a tape casting machine according to claim 6, characterized in that: The plurality of tension springs (74) are distributed correspondingly to the plurality of pistons (76).

8. A roller changing device for a tape casting machine according to claim 7, characterized in that: One end of the plurality of tension springs (74) is fixedly mounted inside the air cavity (73), and the other ends of the plurality of tension springs (74) are respectively fixedly mounted on the plurality of pistons (76).

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