Cutting equipment with length fixing function for plastic film manufacturing

Abstract

The utility model discloses a plastic film manufacturing cutting device with a length fixing function, which comprises a mounting frame, a cutting component is mounted in the mounting frame, the cutting component comprises a screw rod rotationally connected in a groove in the top of the mounting frame, a mounting frame is sleeved outside the screw rod in a threaded manner, and the mounting frame is fixedly connected with the mounting frame. A plurality of limiting rods are fixedly connected into a groove in the top of the mounting frame, one end of the bottom of the mounting frame slidably sleeves the limiting rods, a motor is fixedly mounted in the groove in the bottom of the mounting frame, a rotating shaft of the motor and one end of the bottom of a lead screw are coaxially fixed, and a plurality of mounting rods are slidably inserted into the top of the mounting frame. According to the cutting device, the cutting assembly is arranged, when the sharp degree of a cutting knife is reduced, the cutting knife can be automatically driven to move upwards, so that other positions can be continuously put into use, and the situation that a product is damaged due to insufficient sharpness is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film manufacturing, in particular to a cutting device for plastic film manufacturing with a fixed-length function. Background Art

[0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, which is used for packaging and as a coating layer. After production, plastic film is usually wound on a barrel and cut according to needs when used.

[0003] After searching, a utility model with Chinese patent announcement number CN214690570U discloses a cutting device for plastic film materials, including a bracket fixed on a support table and located between a fixing mechanism and a film-laminating mechanism, a sliding rod is arranged on the bracket along a direction perpendicular to the feeding direction of the plastic film, and a support frame is slidably arranged on the sliding rod.

[0004] As mentioned above, the device uses a cutting knife to cut the plastic film. However, as the use time increases and the position of the cutting knife is fixed, the sharpness of the cutting position will gradually decrease. If it is not discovered in time, it will inevitably cause damage to the cut product. There is room for improvement. Utility Model Content

[0005] The utility model aims to provide a cutting device for plastic film manufacturing with a fixed length function to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cutting device for manufacturing plastic film with a fixed-length function, comprising a mounting frame, a cutting assembly installed inside the mounting frame, the cutting assembly comprising a screw rod rotatably connected inside a groove at the top of the mounting frame, a mounting frame is provided with a threaded sleeve on the outside of the screw rod, a plurality of limit rods are fixedly connected inside the groove at the top of the mounting frame, one end of the bottom of the mounting frame is slidably sleeved on the outside of the plurality of limit rods, a motor is fixedly installed inside the groove at the bottom of the mounting frame, and the motor shaft and one end of the bottom of the screw rod are coaxially fixed.

[0007] As a further preferred embodiment of the present technical solution, a plurality of mounting rods are slidably inserted at the top position of the mounting frame, one end of the plurality of mounting rods is fixedly connected to the same receiving box, a pressure rod is fixedly connected to an outer wall of one side of the receiving box, a pressure sensor is fixedly installed on the top of the outer wall of one end of the mounting frame, and the pressure rod can just squeeze the pressure sensor.

[0008] As a further preferred embodiment of the present technical solution, a bolt is threadedly connected to one side of the receiving box, one end of the bolt is rotatably connected to a fixing plate, the fixing plate is slidably inserted into the receiving box, a cutting knife is placed inside the receiving box, and the cutting knife is located on one side of the fixing plate.

[0009] When the sharpness of the cutting knife decreases, the cutting knife can be automatically driven to move upward, so that other positions can continue to be used, avoiding damage to the product due to insufficient sharpness. If the cutting knife needs to be removed, just turn the bolt, the bolt will rotate and move to the outside of the receiving box, and the fixing plate slidably connected to the inside of the receiving box will be driven by the bolt to move synchronously, and the cutting knife is no longer fixed. When in use, when the sharpness of the contact position between the cutting knife and the plastic film decreases, the force exerted on the cutting knife by the plastic film when passing through the cutting knife will also increase, and the external force exerted on the cutting knife will be applied to the pressure sensor through the receiving box and the pressure rod. When the value detected by the pressure sensor reaches the threshold, it will be transmitted to the external control device, and the control device controls the motor to start, and the motor shaft drives the screw rod to rotate, and the mounting frame slidably sleeved on the outside of the plurality of limit rods will be driven by the screw rod to move upward, and then the cutting knife will also be driven by the mounting frame to move upward synchronously.

[0010] As a further preferred embodiment of the present technical solution, an adjustment component is installed at the bottom of the installation frame, and the adjustment component includes a plurality of sliding rods slidably inserted inside the installation frame, and the plurality of sliding rods are externally fixed with a same connecting frame, an extension plate is fixedly connected to the outer wall of one side of the installation frame, a screw is threadedly connected to the inside of the extension plate, and a fixed block is rotatably connected to one end of the bottom of the screw.

[0011] Adjust the position of the mounting frame as needed to ensure that the device can cut the specified length. Pull or push the mounting frame, and it will move along the sliding rod on the top of the connecting frame under the action of external force, and then the position of the cutting knife on it will also change. Turn the knob on the top of the screw rod, and the screw rod will move downward along the extension plate until the fixing block at its bottom is tightly pressed against the inner wall of the connecting frame to complete the fixation.

[0012] As a further preferred embodiment of the present technical solution, two rollers are rotatably connected to the bottom of the outer walls at both ends of the installation frame, and the plurality of rollers are in contact with the inner wall of the bottom of the connecting frame.

[0013] As a further preferred embodiment of the technical solution, both sides of the outer walls at both ends of the connecting frame are fixedly connected with extension bars, and a through hole is opened inside each of the plurality of extension bars.

[0014] As a further preferred embodiment of the present technical solution, the thread lead angle of the lead screw, bolt and screw is smaller than the equivalent friction angle.

[0015] The utility model provides a cutting device for plastic film manufacturing with a fixed length function, which has the following beneficial effects:

[0016] (1) The utility model provides a cutting assembly, which can automatically drive the cutting knife to move upward when the sharpness of the cutting knife decreases, so that other positions can continue to be used, avoiding damage to the product due to insufficient sharpness. If the cutting knife needs to be removed, just turn the bolt, the bolt will rotate and move toward the outside of the receiving box, and the fixing plate slidably connected to the inside of the receiving box will be driven by the bolt to move synchronously, and the cutting knife is no longer fixed. During use, when the sharpness of the contact position between the cutting knife and the plastic film decreases, the force exerted on the cutting knife by the plastic film when passing through the cutting knife will also increase, and the external force on the cutting knife will be applied to the pressure sensor through the receiving box and the pressure rod. When the value detected by the pressure sensor reaches the threshold, it will transmit the value to the external control device, and the control device controls the motor to start, and the motor shaft drives the screw to rotate, and the mounting frame slidably sleeved on the outside of the plurality of limit rods will be driven by the screw to move upward, and then the cutting knife will also be driven by the mounting frame to move upward synchronously.

[0017] (2) The utility model provides an adjustment component to adjust the position of the installation frame as needed, thereby ensuring that the device can cut a specified length. By pulling or pushing the installation frame, it will move along the sliding rod on the top of the connecting frame under the action of external force, and the position of the cutting knife thereon will also change. By turning the knob on the top of the screw rod, the screw rod will move downward along the extension plate until the fixing block at the bottom thereof is tightly pressed against the inner wall of the connecting frame, thereby completing the fixation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0020] Figure 3 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 4 For the utility model Figure 2 The enlarged structural diagram at B in the middle;

[0022] In the figure: 1. installation frame; 2. extension bar; 3. cutting assembly; 4. adjustment assembly; 301. screw rod; 302. limit rod; 303. mounting bracket; 304. motor; 305. mounting rod; 306. receiving box; 308. pressure rod; 309. pressure sensor; 310. bolt; 311. fixing plate; 401. sliding rod; 402. connecting frame; 403. extension plate; 404. screw rod; 405. fixing block; 406. roller. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model provides a technical solution: Figure 1 and Figure 3 As shown, in this embodiment, a cutting device for manufacturing plastic film with a fixed-length function includes a mounting frame 1, which is characterized in that a cutting component 3 is installed inside the mounting frame 1, and the cutting component 3 includes a screw rod 301 rotatably connected inside the top groove of the mounting frame 1, and a mounting bracket 303 is provided on the external thread sleeve of the screw rod 301, and a plurality of limit rods 302 are fixedly connected inside the top groove of the mounting frame 1, and one end of the bottom of the mounting bracket 303 is slidably sleeved on the outside of the plurality of limit rods 302, and a motor 304 is fixedly installed inside the bottom groove of the mounting frame 1, and the rotating shaft of the motor 304 and one end of the bottom of the screw rod 301 are coaxially fixed.

[0025] A plurality of mounting rods 305 are slidably inserted at the top of the mounting frame 303, one end of the plurality of mounting rods 305 is fixedly connected to the same receiving box 306, a pressure rod 308 is fixedly connected to the outer wall of one side of the receiving box 306, a pressure sensor 309 is fixedly installed on the top of the outer wall of one end of the mounting frame 303, and the pressure rod 308 can just squeeze the pressure sensor 309.

[0026] A bolt 310 is threadedly connected to one side of the receiving box 306 , and one end of the bolt 310 is rotatably connected to a fixing plate 311 . The fixing plate 311 is slidably plugged into the receiving box 306 . A cutting knife is placed inside the receiving box 306 , and the cutting knife is located on one side of the fixing plate 311 .

[0027] If the cutting knife needs to be removed, the bolt 310 is rotated and moved to the outside of the receiving box 306. The fixing plate 311 slidably connected to the inside of the receiving box 306 will be driven by the bolt 310 to move synchronously, and the cutting knife is no longer fixed. When in use, when the sharpness of the contact position between the cutting knife and the plastic film decreases, the force exerted on the cutting knife by the plastic film when passing through the cutting knife will also increase. The external force exerted on the cutting knife will be applied to the pressure sensor 309 through the receiving box 306 and the pressure rod 308. When the value detected by the pressure sensor 309 reaches the threshold, it will be transmitted to the external control device. The control device controls the motor 304 to start, and the motor 304 shaft drives the screw rod 301 to rotate. The mounting frame 303 slidably sleeved on the outside of the plurality of limit rods 302 will be driven by the screw rod 301 to move upward, and then the cutting knife will also be driven by the mounting frame 303 to move upward synchronously.

[0028] like Figure 2 and Figure 3 As shown, an adjustment component 4 is installed at the bottom of the installation frame 1, and the adjustment component 4 includes a plurality of sliding rods 401 that are slidably inserted inside the installation frame 1, and the plurality of sliding rods 401 are fixedly sleeved with the same connecting frame 402 outside. An extension plate 403 is fixedly connected to the outer wall of one side of the installation frame 1, and a screw rod 404 is threadedly connected to the inner part of the extension plate 403, and a fixing block 405 is rotatably connected to one end of the bottom of the screw rod 404.

[0029] The position of the mounting frame 1 is adjusted as needed to ensure that the device can cut a specified length. By pulling or pushing the mounting frame 1, it will move along the sliding rod 401 on the top of the connecting frame 402 under the action of external force, and the position of the cutting knife thereon will also change. Then, the knob on the top of the screw rod 404 is turned, and the screw rod 404 will move downward along the extension plate 403 until the fixing block 405 at the bottom thereof is tightly pressed against the inner wall of the connecting frame 402, and the fixing is completed.

[0030] like Figure 3 As shown, two rollers 406 are rotatably connected to the bottom of the outer walls at both ends of the installation frame 1, and multiple rollers 406 are in contact with the bottom inner wall of the connecting frame 402, which can convert sliding friction into rolling friction, thereby ensuring that the movement process of the installation frame 1 is easier.

[0031] like Figure 1 and Figure 2 As shown, both sides of the outer walls at both ends of the connection frame 402 are fixedly connected with extension bars 2, and a through hole is opened inside each of the extension bars 2, so that the device and the external device can be connected through the extension bars 2.

[0032] like Figure 1 and Figure 2 As shown, the thread lead angles of the screw rod 301 , the bolt 310 and the screw rod 404 are smaller than the equivalent friction angle, so that all three have a self-locking property.

[0033] The utility model provides a cutting device for plastic film manufacturing with a fixed length function, and the specific working principle is as follows:

[0034] The connecting frame 402 is fixed on the external conveying equipment, and the position of the installation frame 1 is adjusted as needed to ensure that the device can cut a specified length. The installation frame 1 is pulled or pushed, and it will move along the sliding rod 401 on the top of the connecting frame 402 under the action of external force, so that the position of the cutting knife thereon will also change. Then, the knob on the top of the screw rod 404 is turned, and the screw rod 404 will move downward along the extension plate 403 until the fixing block 405 at the bottom is tightly pressed against the inner wall of the connecting frame 402, and the fixing is completed. If the cutting knife needs to be removed, just turn the bolt 310, and the bolt 310 will rotate and move toward the outside of the receiving box 306, sliding the fixing plate 310 connected to the inside of the receiving box 306. 1 will be driven by the bolt 310 to move synchronously, and the cutting knife is no longer fixed. When in use, when the sharpness of the contact position between the cutting knife and the plastic film decreases, the force exerted on the cutting knife by the plastic film when passing through the cutting knife will also increase, and the external force exerted on the cutting knife will be applied to the pressure sensor 309 through the receiving box 306 and the pressure rod 308. When the value detected by the pressure sensor 309 reaches the threshold, the value will be transmitted to the external control device, and the control device controls the motor 304 to start, and the motor 304 shaft drives the screw rod 301 to rotate, and the mounting frame 303 slidably sleeved on the outside of the plurality of limit rods 302 will be driven by the screw rod 301 to move upward, and then the cutting knife will also be driven by the mounting frame 303 to move upward synchronously.

[0035] 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 cutting device for plastic film manufacturing with a fixed length function, comprising a mounting frame (1), characterized in that: A cutting assembly (3) is installed inside the installation frame (1), and the cutting assembly (3) comprises a screw rod (301) rotatably connected inside the top groove of the installation frame (1), a mounting frame (303) is threadedly sleeved on the outside of the screw rod (301), a plurality of limit rods (302) are fixedly connected inside the top groove of the installation frame (1), one end of the bottom of the mounting frame (303) is slidably sleeved on the outside of the plurality of limit rods (302), a motor (304) is fixedly installed inside the bottom groove of the installation frame (1), and a rotating shaft of the motor (304) and one end of the bottom of the screw rod (301) are coaxially fixed.

2. A cutting device for plastic film manufacturing with a fixed length function according to claim 1, characterized in that: A plurality of mounting rods (305) are slidably plugged into the top of the mounting frame (303); one end of the plurality of mounting rods (305) is fixedly connected to the same receiving box (306); a pressure rod (308) is fixedly connected to an outer wall of one side of the receiving box (306); a pressure sensor (309) is fixedly installed on the top of the outer wall of one end of the mounting frame (303); and the pressure rod (308) can just squeeze the pressure sensor (309).

3. The cutting device for plastic film manufacturing with a fixed length function according to claim 2, characterized in that: A bolt (310) is threadedly connected to one side of the receiving box (306); one end of the bolt (310) is rotatably connected to a fixing plate (311); the fixing plate (311) is slidably plugged into the inside of the receiving box (306); a cutting knife is placed inside the receiving box (306), and the cutting knife is located on one side of the fixing plate (311).

4. The cutting device for plastic film manufacturing with a fixed length function according to claim 1, characterized in that: An adjustment component (4) is installed at the bottom of the installation frame (1), and the adjustment component (4) comprises a plurality of sliding rods (401) slidably plugged inside the installation frame (1), and the plurality of sliding rods (401) are externally fixedly sleeved with a same connecting frame (402), an extension plate (403) is fixedly connected to an outer wall of one side of the installation frame (1), a screw rod (404) is internally threadedly connected to the extension plate (403), and a fixing block (405) is rotatably connected to one end of the bottom of the screw rod (404).

5. The cutting device for plastic film manufacturing with a fixed length function according to claim 4, characterized in that: Two rollers (406) are rotatably connected to the bottom of the outer walls at both ends of the installation frame (1), and the plurality of rollers (406) are in contact with the inner wall at the bottom of the connection frame (402).

6. The cutting device for plastic film manufacturing with a fixed length function according to claim 4, characterized in that: Extension bars (2) are fixedly connected to both sides of the outer walls at both ends of the connection frame (402), and a through hole is provided inside each of the plurality of extension bars (2).

7. The cutting device for plastic film manufacturing with a fixed length function according to claim 1, characterized in that: The thread lead angles of the screw rod (301), the bolt (310) and the screw rod (404) are smaller than the equivalent friction angle.

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