Dyeing and impregnation device for adhesive tape base paper

Abstract

The present invention discloses a dyeing and impregnation device for adhesive tape base paper, which relates to the technical field of dyeing and impregnation. In order to tension the adhesive tape base paper, the device comprises a base and a tensioning portion, wherein the tensioning portion comprises: a vertical plate 5, which is fixed to the outer wall of the top of the base, and the inner wall of the through hole opened on the surface of the vertical plate 5 is movably connected to a driving disk; a vertical plate 4, which is fixed to the outer wall of the top of the base, and the inner wall of the through hole opened on the surface of the vertical plate 4 is movably connected to a receiving column; a coil spring, one end of which is fixed to the outer wall of the circumference of the driving disk by a pin, and the other end of the coil spring is fixed to the inner surface of the receiving column by a pin. The present invention limits or adjusts the height and position of the hole rollers within a certain range, so that when the rotating plate 1 rotates, the relative position between the two hole rollers can be adjusted, and the hole rollers can be used to guide the adhesive tape base paper, so that when the hole rollers rotate, the adhesive tape base paper can be tensioned.

Description

Technical Field

[0001] The invention relates to the technical field of dyeing and impregnation, in particular to a dyeing and impregnation device for adhesive tape base paper. Background Art

[0002] Adhesive tape base paper is a raw material used in adhesive tape production. During the production process, the tape base paper needs to be impregnated once, coated with glue twice, and finally dried, cut into sheets or rolled up. The impregnation process requires an impregnation device. During the drying process after impregnation, the existing impregnation device has poor contact between the tape base paper and the hot air, which affects the drying effect of the tape base paper.

[0003] After searching, the Chinese patent application number 202010302241.7 discloses a paper impregnation device for producing film paper, whose structure includes an impregnation box, and the impregnation box is provided with a mounting plate, an impregnation tank, a pusher I, a liquid guide tank, a drying box and a support plate. The mounting plate is connected to the two ends of the impregnation by welding. The impregnation tank is located on the left side of the inside of the impregnation box. The pusher I is connected to the upper surface of the mounting plate by rivets. The liquid guide tank is located on the right side of the inside of the impregnation box. The drying box is connected to the right side of the upper surface of the impregnation box by rivets.

[0004] The paper impregnation device for producing film paper in the above patent has the following disadvantages: during the drying process of the impregnated film paper, the film paper and the hot air cannot be fully contacted, which affects the drying effect and rate of the film paper. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a dyeing and impregnation device for adhesive tape base paper.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The dyeing and impregnation device for adhesive tape base paper comprises a base and a tensioning portion, wherein the tensioning portion comprises:

[0008] Vertical plate 5: It is fixed to the outer wall of the top of the base, and the inner wall of the through hole opened on the surface of the vertical plate 5 is movably connected to the driving disk;

[0009] Vertical plate 4: It is fixed to the outer wall of the top of the base, and the inner wall of the through hole opened on the surface of the vertical plate 4 is movably connected to the accommodating column;

[0010] Coil spring: one end of the coil spring is fixed to the outer wall of the driving disc through a pin, and the other end of the coil spring is fixed to the inner surface of the accommodating column through a pin;

[0011] Rotating plate 1: It is welded to one end of the accommodating column, and the outer wall of one side of the rotating plate is movably connected to the hole-shaped roller, and the outer wall of the circumference of the hole-shaped roller is movably connected to the rotating plate 2;

[0012] Extension plate: It is welded to the outer wall of one side of the rotating plate, and a tee is embedded in the inner wall of the through hole opened on the surface of the extension plate, and one end of the tee is movably connected to the groove roller;

[0013] Gear: It is connected to the outer wall of the accommodating column through a key;

[0014] The gear is limited by a pin connection portion.

[0015] Preferably: the pin connection portion includes a T-shaped rod and a spring 1, the T-shaped rod is movably connected to the inner wall of the through hole opened at the top of the vertical plate 4, and the outer wall of the bottom of the T-shaped rod is fixed with a tooth by a pin, the spring is sleeved on the circumferential outer wall of the T-shaped rod, and the two ends of the spring 1 are respectively fixed to the inner wall of the top of the T-shaped rod and the outer wall of the top of the vertical plate 4 by pins.

[0016] Preferably, the pin connection portion further comprises an adsorption frame welded to the outer wall of the top of the vertical plate and an electromagnet fixed to the top of the T-shaped rod by screws.

[0017] As a preferred embodiment of the present invention: a vertical plate six is ​​fixed to the outer wall of the top of the base, an electric cylinder is fixed to the outer wall of one side of the vertical plate six, an output end of the electric cylinder is fixed to a U-shaped frame through a pin, and the same rocker is movably connected between the drive disk and the U-shaped frame.

[0018] As a preferred embodiment of the present invention, a dipping box is fixed to the outer wall of the top of the base, and a dipping roller is movably connected to the inner wall of one side of the dipping box.

[0019] As a preferred embodiment of the present invention: the inner wall of the through hole opened in the outer wall of one side of the impregnation box is movably connected to the stirring column, the circumferential outer wall of the driving disk and the circumferential outer wall of the stirring column are both fixed with pulleys by pins, and the two pulleys are driven by a belt.

[0020] Furthermore: a vertical plate 1 and a vertical plate 3 are fixed to the outer wall of the top of the base, a guide roller 2 is movably connected to the outer wall of one side of the vertical plate 1, and a guide roller 1 is movably connected to the outer wall of one side of the vertical plate 3.

[0021] As a further solution of the present invention: a cutting plate is fixed to the top outer wall of the base, a accommodating hole is opened on the surface of the cutting plate, an L-shaped plate is welded to the top outer wall of the three vertical plates, a connecting rod is movably connected to the inner wall of the through hole opened on the top of the L-shaped plate, and a cutting part is fixed to the bottom of the connecting rod.

[0022] As a further solution of the present invention: a toggle plate is welded to the circumferential outer wall of the driving disc, and a waist-shaped hole adapted to the outer diameter of the connecting rod is opened on the surface of the toggle plate.

[0023] As a further solution of the present invention: the cutting part includes a cutting knife and a sliding rod, the cutting knife is welded to the bottom outer wall of the connecting rod, the sliding rod is movably connected to the inner wall of the through hole opened on the surface of the cutting knife, the outer wall of the circumference of the sliding rod is sleeved with a spring 2, and the two ends of the spring 2 are respectively welded to the top inner wall of the sliding rod and the top outer wall of the cutting knife, and the bottom outer wall of the sliding rod is fixed with a pressure plate by a pin.

[0024] The beneficial effects of the present invention are:

[0025] 1. By limiting or adjusting the height and position of the hole-shaped roller within a certain range, the relative position between the two hole-shaped rollers can be adjusted when the rotating plate rotates. The hole-shaped roller can be used to guide the tape base paper, so that when the hole-shaped roller rotates, the tape base paper can be tensioned to ensure the fit between the tape base paper and the outer wall of the hole-shaped roller.

[0026] 2. By connecting the tee pipe and the heating equipment such as the hot air blower (not shown), the hot air can be introduced into the hole roller through the tee pipe, and finally discharged through the rectangular holes starting from the surface of the hole roller, so that the hot air can act on the surface of the tape base paper, thereby drying the impregnated tape base paper.

[0027] 3. By providing an electromagnet so that it can effectively overcome the elastic force of spring 1 when energized, it can drive the T-bar and the latch tooth to move upward, so that when the latch tooth is disengaged from the outer wall of the gear circumference, the gear can rotate normally. When the electromagnet is powered off, the latch tooth can be stuck into the outer wall of the gear circumference under the action of the rebound force of spring 1, thereby limiting the gear.

[0028] 4. By providing a belt, the stirring column can be driven to rotate synchronously during the rotation of the driving disc, so that the stirring column can be used to stir the dye in the impregnation box to ensure that the surface of the tape base paper can be evenly impregnated with the dye.

[0029] 5. By providing a toggle plate, the circular motion of the driving disk can be converted into the linear motion of the connecting rod, so that the connecting rod can drive the cutting part to cut the impregnated tape paper during the downward movement. The pressure plate can be used to press and fix the top of the tape paper during the cutting process, thereby ensuring the stability of the cutting knife during the cutting process of the tape paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0031] Figure 2This is a side structural diagram of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0032] Figure 3 This is a schematic diagram of the overall structure of the tensioning part of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0033] Figure 4 This is a schematic diagram of the exploded structure of the tensioning portion of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0034] Figure 5 This is a schematic diagram of the main structure of the tensioning part of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0035] Figure 6 This is a schematic structural diagram of the cutting portion of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention;

[0036] Figure 7 The figure is a schematic structural diagram of the impregnation part of the dyeing and impregnation device for adhesive tape base paper proposed by the present invention.

[0037] In the figure: 1-base, 2-guide roller 1, 3-connecting rod, 4-drive disk, 5-U-shaped frame, 6-electric cylinder, 7-vertical plate 1, 8-guide roller 2, 9-rocker, 10-cutting knife, 11-vertical plate 3, 12-belt, 13-impregnation box, 14-rotating plate 1, 15-switching plate, 16-gear, 17-hole roller, 18-rotating plate 2, 19-extension plate, 20-tee pipe, 21-vertical plate 4, 22-pulley, 23-coil spring, 24-vertical plate 5, 25-adsorption frame, 26-T-bar, 27-accommodating column, 28-grip, 29-spring 1, 30-electromagnet, 31-L-shaped plate, 32-sliding rod, 33-cutting plate, 34-accommodating hole, 35-pressing plate, 36-spring 2, 37-impregnation roller, 38-stirring column, 39-vertical plate 6. DETAILED DESCRIPTION

[0038] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0039] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not limit the referred device, structure or element to have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on this patent.

[0041] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0042] Example 1:

[0043] Dyeing and impregnation device for adhesive tape base paper, such as Figure 1-7 As shown, it includes a base 1 and a tensioning portion, and the tensioning portion includes:

[0044] Vertical plate 5 24: It is fixed to the top outer wall of the base 1 by bolts, and the inner wall of the through hole opened on the surface of vertical plate 5 24 is rotatably connected to the driving disk 4;

[0045] Vertical plate 4 21: It is fixed to the top outer wall of the base 1 by bolts, and the inner wall of the through hole opened on the surface of vertical plate 4 21 is rotatably connected to the accommodating column 27;

[0046] Coil spring 23: One end of the coil spring 23 is fixed to the outer wall of the driving disk 4 by a pin, and the other end of the coil spring 23 is fixed to the inner surface of the receiving column 27 by a pin;

[0047] Rotating plate 14: It is welded to one end of the accommodating column 27, and the outer wall of one side of the rotating plate 14 is rotatably connected to the hole-shaped roller 17, and the outer wall of the hole-shaped roller 17 is rotatably connected to the rotating plate 2 18;

[0048] Extension plate 19: It is welded to the outer wall of one side of rotating plate 2 18, and the inner wall of the through hole opened on the surface of extension plate 19 is embedded with a tee pipe 20, and one end of the tee pipe 20 is rotatably connected to the grooved roller 17;

[0049] Gear 16: It is connected to the outer wall of the accommodating column 27 through a key;

[0050] The gear 16 is limited by a pin connection;

[0051] By utilizing the connecting effect of the coil spring 23, when the driving disk 4 is driven to rotate, the accommodating column 27 can drive the rotating plate 14 to rotate, so that the height and position of the hole-shaped roller 17 can be limited or adjusted within a certain range. Preferably, in this embodiment, the number of hole-shaped rollers 17 is two, so that when the rotating plate 14 is rotating, the relative position between the two hole-shaped rollers 17 can be adjusted, and the hole-shaped rollers 17 can be used to guide the tape base paper, so that when the hole-shaped rollers 17 rotate, the tape base paper can be tensioned to ensure the fit between the tape base paper and the circumferential outer wall of the hole-shaped roller 17;

[0052] At the same time, by connecting the three-way pipe 20 to a heating device such as a hot air blower, hot air can be introduced into the grooved roller 17 through the three-way pipe 20, and finally discharged through the rectangular holes on the surface of the grooved roller 17, so that the hot air can act on the surface of the tape base paper, thereby drying the impregnated tape base paper;

[0053] By providing a pin connection portion, the teeth on the outer surface of the gear 16 can be pinned and limited after the hole-shaped roller 17 rotates to a suitable position, ensuring that the tension of the hole-shaped roller 17 on the tape base paper reaches a stable value.

[0054] The pin connection portion includes a T-shaped rod 26 and a spring 29. The T-shaped rod 26 is slidably connected to the inner wall of the through hole opened in the top of the fourth riser 21, and a tooth 28 is fixed to the bottom outer wall of the T-shaped rod 26 via a pin. The spring 29 is sleeved on the circumferential outer wall of the T-shaped rod 26, and the two ends of the spring 29 are respectively fixed to the top inner wall of the T-shaped rod 26 and the top outer wall of the fourth riser 21 via pins. The pin connection portion also includes an adsorption frame 25 welded to the top outer wall of the fourth riser 21 and an electromagnet 30 fixed to the top of the T-shaped rod 26 by screws.

[0055] By providing an electromagnet 30, it can effectively overcome the elastic force of spring 1 29 when energized, thereby driving the T-bar 26 and the latch 28 to move upward, so that when the latch 28 is disengaged from the outer wall of the circumference of the gear 16, the gear 16 can rotate normally. When the electromagnet 30 is de-energized, the latch 28 can be engaged with the outer wall of the circumference of the gear 16 under the action of the rebound force of spring 1 29, thereby limiting the position of the gear 16.

[0056] A vertical plate 6 39 is fixed to the outer wall of the top of the base 1 by bolts, an electric cylinder 6 is fixed to the outer wall of one side of the vertical plate 6 39 by bolts, the output end of the electric cylinder 6 is fixed to a U-shaped frame 5 by a pin, and the driving plate 4 and the U-shaped frame 5 are rotatably connected by a rocker 9;

[0057] By providing an electric cylinder 6, the U-shaped frame 5 can be driven to move horizontally, and by providing a rocker 9, the linear motion of the U-shaped frame 5 can be converted into the circular motion of the driving disk 4, so that the driving disk 4 can drive the coil spring 23 and the accommodating column 27 to rotate when rotating.

[0058] The top outer wall of the base 1 is fixed with an impregnation box 13 by bolts, and the inner wall of one side of the impregnation box 13 is rotatably connected with an impregnation roller 37;

[0059] The dye can be stored by providing an impregnation box 13, and the tape base paper can be transported and guided by providing an impregnation roller 37. Preferably, the number of impregnation rollers 37 in this embodiment is preferably three, so that the tape base paper can be immersed in the dye for impregnation when being transported by the impregnation rollers 37.

[0060] The inner wall of the through hole opened on the outer wall of one side of the impregnation box 13 is rotatably connected to the stirring column 38. The outer wall of the driving disk 4 and the outer wall of the stirring column 38 are both fixed with pulleys 22 through pins, and the transmission is carried out between the two pulleys 22 by a belt 12.

[0061] By providing a belt 12, the stirring column 38 can be synchronously driven to rotate during the rotation of the drive disk 4, so that the stirring column 38 can be used to stir the dye in the impregnation box 13 to a certain extent, thereby ensuring that the surface of the tape base paper can be evenly impregnated with the dye. When the dye is stirred by the stirring column 38, the output end of the electric cylinder 6 is controlled to make it reciprocate within a limited range, so that the stirring column 38 can stir the dye by rotating clockwise and counterclockwise.

[0062] The outer wall of the top of the base 1 is fixed with a vertical plate 7 and a vertical plate 3 11 by bolts. The outer wall of one side of the vertical plate 7 is rotatably connected to the guide roller 2 8, and the outer wall of one side of the vertical plate 3 11 is rotatably connected to the guide roller 1 2;

[0063] The tape base paper can be transported and guided by providing guide roller 1 2 and guide roller 2 8.

[0064] When this embodiment is in use, when it is necessary to impregnate the tape base paper, first use guide roller 1 2 and guide roller 2 8 to guide the tape base paper, then use the tensioning part to tension the tape base paper, and use the dye in the impregnation box 13 to impregnate the tape base paper. At the same time, the three-way pipe 20 and the hot air blower are connected so that hot air can dry the impregnated tape base paper through the rectangular holes on the hole-shaped roller 17.

[0065] Example 2:

[0066] Dyeing and impregnation device for adhesive tape base paper, such as Figure 1-6As shown, in order to facilitate cutting of the impregnated tape base paper, this embodiment makes the following supplements on the basis of Example 1: a cutting plate 33 is fixed to the top outer wall of the base 1 by bolts, and a receiving hole 34 is provided on the surface of the cutting plate 33. An L-shaped plate 31 is welded to the top outer wall of the vertical plate 31. The inner wall of the through hole provided on the top of the L-shaped plate 31 is slidably connected to the connecting rod 3. A cutting portion is fixed to the bottom of the connecting rod 3. A toggle plate 15 is welded to the circumferential outer wall of the driving disk 4, and a waist-shaped hole adapted to the outer diameter of the connecting rod 3 is provided on the surface of the toggle plate 15.

[0067] By providing the toggle plate 15 , the circular motion of the driving disc 4 can be converted into the linear motion of the coupling rod 3 , so that the coupling rod 3 can drive the cutting part to cut the impregnated tape base paper during the downward movement.

[0068] The cutting portion includes a cutting blade 10 and a sliding rod 32. The cutting blade 10 is welded to the bottom outer wall of the connecting rod 3. The sliding rod 32 is slidably connected to the inner wall of the through hole opened on the surface of the cutting blade 10. A second spring 36 is sleeved on the outer wall of the circumference of the sliding rod 32, and the two ends of the second spring 36 are respectively welded to the top inner wall of the sliding rod 32 and the top outer wall of the cutting blade 10. The bottom outer wall of the sliding rod 32 is fixed with a pressure plate 35 by a pin.

[0069] The cutting blade 10 can be used to cut the tape base paper, and the pressing plate 35 can be used to press and fix the top of the tape base paper during the cutting process, thereby ensuring the stability of the cutting blade 10 during the cutting process. The cutting plate 33 can support the tape base paper.

[0070] At the same time, in order to avoid interference between the cutting of the tape base paper and the stirring of the dye by the stirring column 38, when the electric cylinder 6 is used to drive the stirring column 38 to rotate, the maximum moving stroke of the output end of the electric cylinder 6 needs to be limited, so as to ensure that the cutting part of the stirring column 38 will not contact the surface of the tape base paper during the stirring process. When the cutting part needs to be used for cutting, the moving distance of the output end of the electric cylinder 6 can be increased, so that the cutting part can be used to cut the tape base paper.

[0071] The above is a preferred embodiment of the present invention, but it is not the only embodiment of the present invention. Any modification, equivalent substitution and improvement made by any technician familiar with the field within the technical scope disclosed by the present invention in combination with existing technology or public common sense within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A device for dyeing and impregnating adhesive tape base paper, comprising a base (1) and a tensioning portion, characterized in that: The tensioning portion comprises: Vertical plate five (24): It is fixed to the top outer wall of the base (1), and the inner wall of the through hole opened on the surface of the vertical plate five (24) is movably connected to the driving disk (4); Vertical plate four (21): It is fixed to the outer wall of the top of the base (1), and the inner wall of the through hole opened on the surface of the vertical plate four (21) is movably connected to the accommodating column (27); Coil spring (23): one end of which is fixed to the outer circumferential wall of the driving disk (4) through a pin, and the other end of the coil spring (23) is fixed to the inner surface of the accommodating column (27) through a pin; Rotating plate 1 (14): It is welded to one end of the accommodating column (27), and the outer wall of one side of the rotating plate 1 (14) is movably connected to the hole-shaped roller (17), and the outer wall of the circumference of the hole-shaped roller (17) is movably connected to the rotating plate 2 (18); Extension plate (19): It is welded to the outer wall of one side of the rotating plate (18), and the inner wall of the through hole opened on the surface of the extension plate (19) is embedded with a three-way pipe (20), and one end of the three-way pipe (20) is movably connected to the hole roller (17); Gear (16): connected to the outer circumferential wall of the accommodating column (27) via a key; The gear (16) is limited by a pin connection portion; The pin connection portion includes a T-shaped rod (26) and a spring (29), wherein the T-shaped rod (26) is movably connected to the inner wall of the through hole opened at the top of the vertical plate (21), and the outer wall of the bottom of the T-shaped rod (26) is fixed with a tooth (28) by a pin, and the spring (29) is sleeved on the circumferential outer wall of the T-shaped rod (26), and the two ends of the spring (29) are respectively fixed to the inner wall of the top of the T-shaped rod (26) and the outer wall of the top of the vertical plate (21) by pins, and the pin connection portion also includes an adsorption frame (25) welded to the outer wall of the top of the vertical plate (21) and an electromagnet (30) fixed to the top of the T-shaped rod (26) by screws.

2. The dyeing and impregnation device for adhesive tape base paper according to claim 1, characterized in that: A vertical plate six (39) is fixed to the outer wall of the top of the base (1), an electric cylinder (6) is fixed to the outer wall of one side of the vertical plate six (39), an output end of the electric cylinder (6) is fixed to a U-shaped frame (5) via a pin, and a rocker (9) is movably connected between the driving disc (4) and the U-shaped frame (5).

3. The dyeing and impregnation device for adhesive tape base paper according to claim 2, characterized in that: A dipping box (13) is fixed to the outer wall of the top of the base (1), and a dipping roller (37) is movably connected to the inner wall of one side of the dipping box (13).

4. The dyeing and impregnation device for adhesive tape base paper according to claim 3, characterized in that: The inner wall of a through hole formed in the outer wall of one side of the impregnation box (13) is movably connected to a stirring column (38); the circumferential outer wall of the driving disc (4) and the circumferential outer wall of the stirring column (38) are both fixed with pulleys (22) via pins, and a belt (12) is used to transmit power between the two pulleys (22).

5. The dyeing and impregnation device for adhesive tape base paper according to claim 4, characterized in that: A vertical plate 1 (7) and a vertical plate 3 (11) are fixed to the top outer wall of the base (1); a guide roller 2 (8) is movably connected to the outer wall of one side of the vertical plate 1 (7); and a guide roller 1 (2) is movably connected to the outer wall of one side of the vertical plate 3 (11).

6. The dyeing and impregnation device for adhesive tape base paper according to claim 5, characterized in that: A cutting plate (33) is fixed to the top outer wall of the base (1), and a receiving hole (34) is provided on the surface of the cutting plate (33). An L-shaped plate (31) is welded to the top outer wall of the vertical plate (11), and a connecting rod (3) is movably connected to the inner wall of the through hole provided at the top of the L-shaped plate (31), and a cutting portion is fixed to the bottom of the connecting rod (3).

7. The dyeing and impregnation device for adhesive tape base paper according to claim 6, characterized in that: A toggle plate (15) is welded to the circumferential outer wall of the driving disc (4), and a waist-shaped hole matching the outer diameter of the connecting rod (3) is opened on the surface of the toggle plate (15).

8. The dyeing and impregnation device for adhesive tape base paper according to claim 7, characterized in that: The cutting portion includes a cutting knife (10) and a sliding rod (32), wherein the cutting knife (10) is welded to the bottom outer wall of the connecting rod (3), and the sliding rod (32) is movably connected to the inner wall of a through hole opened on the surface of the cutting knife (10). A second spring (36) is sleeved on the circumferential outer wall of the sliding rod (32), and the two ends of the second spring (36) are respectively welded to the top inner wall of the sliding rod (32) and the top outer wall of the cutting knife (10), and a pressure plate (35) is fixed to the bottom outer wall of the sliding rod (32) by a pin.

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