Paper box sealing device used on paper box forming and packaging machine

Abstract

The utility model relates to the field of packaging equipment, in particular to a carton sealing device used on a carton forming and packaging machine, which comprises a rack, a carton forming mechanism, a glue spraying device and a carton sealing device are arranged on the rack, and the glue spraying device and the carton sealing device are both arranged above the carton forming mechanism. The box forming mechanism comprises two conveying chains arranged on the machine frame, the conveying chains are driven by a forming motor to rotate, a plurality of conveying clamping blocks are further fixed to the conveying chains, side sealing air cylinders are further symmetrically fixed to the positions, on the two sides of the conveying chains, of the machine frame, side sealing push plates are fixed to the tail ends of piston rods of the side sealing air cylinders, and the side sealing push plates are fixed to the tail ends of the piston rods of the side sealing air cylinders. A right guide rod is further fixed to the portion, on one side of the conveying chain, of the machine frame, and a left guide rod is further fixed to the portion, on the other side of the conveying chain, of the machine frame. According to the device, paperboards can be manufactured into cartons, the product packaging efficiency is greatly improved, and automatic packaging is achieved.

Description

Technical Field

[0001] The present invention relates to the field of packaging equipment, and particularly to a carton sealing device used on a carton forming and packaging machine. Background Art

[0002] Currently, the most common packaging method used in domestic and foreign packaging is carton and paper box packaging. There are two main reasons for this. Firstly, paper materials are generally easy to obtain, with a wide variety of varieties, complete specifications, and convenient processing. Secondly, cartons and paper boxes are easy to destroy, recyclable, have the advantages of buffering, shock absorption, protecting products, low cost, and easy processing. Moreover, cartons and paper boxes are a type of green packaging material. With the increasing emphasis on environmental protection today, carton packaging is becoming increasingly popular and has good prospects. Due to the growing market demand, there are an endless number of carton packaging machines on the market. A carton packaging machine is also known as a carton forming machine or a carton unpacking machine. This kind of mechanical equipment uses a single-piece box piece formed by die-cutting with a carton die-cutting machine as the blank of the packaging carton. After the carton completes the standing box action, it performs a sealing action on the side or bottom of the carton, so as to be directly used for product packaging. Patent Application No.: CN201610358688.X discloses a carton packaging machine, which is composed of a tape sealing machine, a frame, a moving frame, a carton forming device, a program control device, and a pushing cylinder. A bottom supporting roller is installed on the frame. One side of the bottom supporting roller is equipped with a moving frame through symmetrically arranged driving motors and driving lead screws. A carton forming device is installed inside the moving frame; on the other side of the bottom supporting roller, a folding roller is installed through a guiding roller and a mounting frame; a pushing cylinder is installed below the rear end of the folding roller; a tape sealing machine is arranged at the front end of the folding roller. When this carton packaging machine works, first, an operator needs to manually insert the unformed carton into the moving frame, form the carton through the device. After the carton is formed, the front and rear suction cups lose suction, and the carton is completely placed on the bottom supporting roller. Then, the operator manually places the items to be packaged in the carton, and then the operator seals the carton. However, this type of carton packaging machine finally requires manual placement of products and sealing, resulting in low efficiency.

[0003] The present invention is specifically studied and proposed in view of the deficiencies of the prior art. Summary of the Invention

[0004] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a carton sealing device used on a carton forming and packaging machine.

[0005] The present invention can be realized through the following technical solutions:

[0006] The present invention discloses a carton sealing device used on a carton forming and packaging machine, which includes a frame. A box body forming mechanism, a glue spraying device and a sealing device are arranged on the frame. The glue spraying device and the sealing device are both arranged above the box body forming mechanism. The box body forming mechanism includes two conveying chains arranged on the frame. The conveying chains are driven to rotate by a forming motor. A plurality of conveying clamping blocks are also fixedly arranged on the conveying chains. Side sealing cylinders are symmetrically and fixedly arranged on the frame on both sides of the conveying chains. A side sealing push plate is fixedly arranged at the end of the piston rod of the side sealing cylinder. A right guide rod is fixedly arranged on the frame on one side of the conveying chain, and a left guide rod is fixedly arranged on the frame on the other side of the conveying chain. A side sealing cylinder is also fixedly arranged on the frame between the left guide rod and the side sealing cylinder. A side sealing push plate is fixedly arranged at the end of the piston rod of the side sealing cylinder. Fixed cylinders are symmetrically and fixedly arranged on the frame on both sides of the conveying chains. Fixed push plates are fixedly arranged at the ends of the piston rods of the fixed cylinders. Bottom sealing cylinders are fixedly arranged on the frame below the fixed cylinders. Bottom sealing push plates are fixedly arranged at the ends of the piston rods of the bottom sealing cylinders. The glue spraying device includes side glue spraying heads symmetrically and fixedly arranged on the frame on both sides of the conveying chains. A top glue spraying head is obliquely fixedly arranged on the frame above the conveying chains. The sealing device includes a sealing lifting cylinder arranged on the frame. A pressing plate is fixedly arranged at the end of the piston rod of the sealing lifting cylinder. Side pressing blocks are symmetrically arranged on both sides of the bottom of the pressing plate. A sealing rotating rod is also arranged on the frame on one side of the pressing plate. The sealing rotating rod is driven to rotate by a sealing side pressing cylinder. A plurality of side pressing blocks are also fixedly arranged on the sealing rotating rod. A sealing top cylinder is obliquely arranged on the frame on the other side of the pressing plate. A sealing top push plate is fixedly arranged at the end of the piston rod of the sealing top cylinder.

[0007] Preferably, a bottle guiding mechanism is also arranged on the frame. A bottle pushing mechanism is arranged above the bottle guiding mechanism. The bottle guiding mechanism includes a guiding plate arranged on the frame. Guiding positioning plates are arranged on both sides above the guiding plate. The bottle pushing mechanism includes a transverse lead screw module arranged on the frame. A pushing slide is arranged at the output end of the transverse lead screw module. The pushing slide is driven to move by a transverse motor. A vertical lead screw module is vertically fixedly arranged on the pushing slide. A vertical slide plate is arranged at the output end of the vertical lead screw module. The vertical slide plate is driven to move by a vertical motor. A closing lead screw module is also arranged on the vertical slide plate. Closing sliders are symmetrically arranged on both sides at the output end of the closing lead screw module. The closing sliders are both driven to move by a closing motor. Closing plates are fixedly arranged at the bottoms of the closing sliders.

[0008] Preferably, guide shafts are fixed to the ends of the guide positioning plates. Guide plates rotatably connected to the guide shafts are arranged on the guide shafts. Springs are also arranged on the guide positioning plates, and the ends of the springs are connected to the guide plates. After the closing plate drives the bottle to move to the position of the guide plate and pushes the guide plate to rotate, when the guide plate rotates around the guide shaft, the end of the guide plate contacts the two side sealing plates of the carton close to the guide plate and then pushes the side sealing plates of the carton to rotate, so that the end of the guide plate is inserted between the two side sealing plates of the carton to open the side sealing plates of the carton, ensuring that after the bottle reaches the bottom plate of the carton, the four side sealing plates of the carton wrap the bottle.

[0009] Preferably, the carton side-pressing cylinder is arranged on the machine frame and rotatably connected to the machine frame. A carton-pressing push rod is arranged at the end of the piston rod of the carton side-pressing cylinder, and the end of the carton-pressing push rod is fixed to the carton-pressing rotating rod.

[0010] Preferably, the carton top cylinder is arranged on the carton-sealing slide plate. The carton-sealing slide plate is slidably connected to the machine frame. A carton-sealing lead screw is also arranged on the machine frame. The carton-sealing lead screw passes through the carton-sealing slide plate and is threadedly connected to the carton-sealing slide plate. The side pressing block is fixed to the pressing plate by bolts. By adjusting the position of the carton-sealing slide plate through the carton-sealing lead screw and adjusting the position of the side pressing block, the carton-sealing requirements for cartons of different sizes are realized.

[0011] Working principle: When the bottle moves to the position directly opposite the bottle guiding mechanism, the vertical motor drives the vertical lead screw module to operate, and the vertical slide plate moves downward. At the same time, the closing motor drives the closing lead screw module to operate, and the two closing sliders move, causing the two closing plates to approach each other. After the bottles gather between the two closing plates, the horizontal motor drives the horizontal lead screw module to operate, and the pushing slide on the horizontal lead screw module moves. The pushing slide drives the bottle to reach the guiding plate and then move towards the box forming mechanism. The cardboard is clamped between two adjacent conveying clamping blocks on the conveying chain. Since the cardboard includes the bottom plate of the carton, carton side plates are fixed on both the left and right sides of the bottom plate of the carton. The end of the carton side plate on the right is fixed with a carton side seal plate, and the end of the carton side plate on the left is fixed with a carton top plate. Moreover, carton bottom seal plates are symmetrically fixed on the front and back sides of the bottom plate of the carton, carton side seal plates are fixed on the front and back sides of the carton side plates, and carton top seal plates are fixed on the front and back sides of the carton top plate. After the cardboard is clamped between the two conveying clamping blocks, the carton side plates are bent along with the bottom plate of the carton. Then, the forming motor drives the conveying chain to rotate, and the cardboard moves a certain distance with the conveying chain. After a carton side seal plate on the cardboard contacts the right guide rod, the right guide rod pushes the carton side seal plate to bend. Additionally, the horizontal motor drives the pushing slide to move again, and the bottle moves to the bottom plate of the carton on the cardboard along with the closing plate. After the bottle moves to the bottom plate of the carton, the closing motor drives the two closing sliders to move away from each other, and the vertical motor drives the vertical slide plate to rise. After the closing plate separates from the bottle, the horizontal motor drives the horizontal lead screw module to operate, and the closing plate returns to its initial position. After the closing plate separates from the bottle, the side sealing cylinder is activated, and the piston rods on the two side sealing cylinders extend, causing the two side sealing push plates to move. The side sealing push plates bend the two carton side seal plates on the right carton side plate. Then, the edge sealing cylinder is activated, and the piston rod on the edge sealing cylinder extends, causing the edge sealing push plate to move. The edge sealing push plate bends the last carton side seal plate. After all four carton side seal plates are bent, the bottle is fixed in the space formed by the four carton side seal plates. The forming motor drives the conveying chain to rotate again, and the cardboard moves again. The left guide rod and the right guide rod hold the carton side seal plates. When the cardboard moves past the position of the glue spraying device, glue is sprayed out through the side glue spraying nozzles. Glue is sprayed on all four carton side seal plates, and glue is also sprayed out through the top glue spraying nozzles, and glue is sprayed on the carton side seal plate. After the cardboard moves to directly below the box sealing device, the box sealing edge pressing cylinder is activated, and the piston rod on the box sealing edge pressing cylinder shortens, causing the box sealing rotating rod to rotate, and the edge pressing block moves closer to the carton side seal plate. The edge pressing block pushes the carton side seal plate to bend. After the carton side seal plate bends, the box sealing top cylinder is activated, and the piston rod on the box sealing top cylinder extends, causing the box sealing top push plate to start moving. The box sealing top push plate moves closer to the carton top plate. The box sealing top push plate pushes the carton top plate to bend. The carton top plate is above the carton side seal plate. Then, the box sealing lifting cylinder is activated, and the piston rod on the box sealing lifting cylinder extends, causing the pressing plate to descend. When the side pressing block on the pressing plate contacts the carton top seal plate, it pushes the carton top seal plate to bend. Moreover, the pressing plate pushes the carton top plate to cover the carton side seal plate, and the carton side seal plate and the carton top plate are bonded together through the glue on the carton side seal plate.And the bottom sealing cylinder starts, the piston rod on the bottom sealing cylinder extends, the bottom sealing push plate moves, and the bottom sealing plate of the carton bends. Finally, the fixing cylinder starts, the piston rod on the fixing cylinder extends, and the fixing push plate pushes the corresponding top sealing plate and bottom sealing plate of the carton to cover the side sealing plate of the carton. The top sealing plate and bottom sealing plate of the carton are glued to the side sealing plate of the carton through the glue on the side sealing plate of the carton. After forming a cuboid carton with the cardboard through the glue, a specified quantity of bottles are packed in the carton. This device can make cardboard into cartons and pack a specified quantity of bottles in the cartons, greatly improving the packaging efficiency of products and realizing automatic packaging.

[0012] The present invention has the following advantages compared with the existing technology:

[0013] This device can make cardboard into cartons and pack a specified quantity of bottles in the cartons, greatly improving the packaging efficiency of products and realizing automatic packaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further details the specific embodiments of the present invention with reference to the drawings, where:

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic structural diagram of the bottle pushing mechanism;

[0017] Figure 3 is a schematic structural diagram of the bottle guiding mechanism;

[0018] Figure 4 is a schematic structural diagram of the first angle of the position of the box forming mechanism;

[0019] Figure 5 is a schematic structural diagram of the second angle of the position of the box forming mechanism;

[0020] Figure 6 is Figure 5 the enlarged view at A in

[0021] Figure 7 is a schematic structural diagram of the third angle of the position of the box forming mechanism;

[0022] Figure 8 is Figure 7 the enlarged view at B in

[0023] Figure 9 is a schematic structural diagram of the first angle of the carton sealing device;

[0024] Figure 10 is a schematic structural diagram of the second angle of the carton sealing device;

[0025] Figure 11It is a schematic structural diagram of the third angle of the case-sealing device;

[0026] Figure 12 It is a schematic process diagram of forming a carton from cardboard;

[0027] In the figure: 1. cardboard; 101. carton bottom board; 102. carton side board; 103. carton side sealing board; 104. carton top board; 105. carton top sealing board; 106. carton bottom sealing board; 107. carton edge sealing board; 4. bottle guiding mechanism; 401. guiding plate; 402. guiding positioning plate; 403. guiding shaft; 404. guiding piece; 405. spring; 5. bottle pushing mechanism; 501. horizontal lead screw module; 502. horizontal motor; 503. pushing slide; 504. vertical lead screw module; 505. vertical motor; 506. vertical slide; 507. closing motor; 508. closing lead screw module; 509. closing slider; 510. closing plate; 6. box forming mechanism; 601. conveying chain; 602. conveying clamping block; 603. forming motor; 604. right guide rod; 605. side sealing cylinder; 606. side sealing push plate; 607. edge sealing cylinder; 608. edge sealing push plate; 609. left guide rod; 610. fixing cylinder; 611. fixing push plate; 612. bottom sealing cylinder; 613. bottom sealing push plate; 8. glue spraying device; 801. side glue spraying head; 802. top glue spraying head; 9. case-sealing device; 901. case-sealing lifting cylinder; 902. pressing plate; 903. side pressing block; 904. case-sealing edge pressing cylinder; 905. case-sealing push rod; 906. case-sealing rotating rod; 907. edge pressing block; 908. case-sealing top cylinder; 909. case-sealing top push plate; 910. case-sealing slide; 911. case-sealing lead screw; 10. frame; Specific embodiments

[0028] The following will describe in detail the embodiments of the present invention with reference to the accompanying drawings:

[0029] Embodiment 1:

[0030] As Figures 1 to 12As shown in the figure, this embodiment discloses a carton sealing device used on a carton forming and packaging machine, which includes a frame 10. A box body forming mechanism 6, a glue spraying device 8 and a sealing device 9 are arranged on the frame 10. The glue spraying device 8 and the sealing device 9 are both arranged above the box body forming mechanism 6. The box body forming mechanism 6 includes two conveying chains 601 arranged on the frame 10. The conveying chains 601 are driven to rotate by a forming motor 603. A plurality of conveying clamping blocks 602 are fixedly arranged on the conveying chains 601. Side sealing cylinders 605 are symmetrically and fixedly arranged on the frame 10 on both sides of the conveying chains 601. A side sealing push plate 606 is fixedly arranged at the end of the piston rod of the side sealing cylinder 605. A right guide rod 604 is fixedly arranged on the frame 10 on one side of the conveying chain 601. A left guide rod 609 is fixedly arranged on the frame 10 on the other side of the conveying chain 601. An edge sealing cylinder 607 is fixedly arranged on the frame 10 between the left guide rod 609 and the side sealing cylinder 605. An edge sealing push plate 608 is fixedly arranged at the end of the piston rod of the edge sealing cylinder 607. Fixed cylinders 610 are symmetrically and fixedly arranged on the frame 10 on both sides of the conveying chains 601. Fixed push plates 611 are fixedly arranged at the ends of the piston rods of the fixed cylinders 610. Bottom sealing cylinders 612 are fixedly arranged on the frame 10 below the fixed cylinders 610. Bottom sealing push plates 613 are fixedly arranged at the ends of the piston rods of the bottom sealing cylinders 612. The glue spraying device 8 includes side glue spraying heads 801 symmetrically and fixedly arranged on the frame 10 on both sides of the conveying chain 601. A top glue spraying head 802 is obliquely fixedly arranged on the frame 10 above the conveying chain 601. The sealing device 9 includes a sealing lifting cylinder 901 arranged on the frame 10. A pressing plate 902 is fixedly arranged at the end of the piston rod of the sealing lifting cylinder 901. Side pressing blocks 903 are symmetrically arranged on both sides of the bottom of the pressing plate 902. A sealing rotating rod 906 is arranged on the frame 10 on one side of the pressing plate 902. The sealing rotating rod 906 is driven to rotate by a sealing edge pressing cylinder 904. A plurality of edge pressing blocks 907 are fixedly arranged on the sealing rotating rod 906. A sealing top cylinder 908 is obliquely arranged on the frame 10 on the other side of the pressing plate 902. A sealing top push plate 909 is fixedly arranged at the end of the piston rod of the sealing top cylinder 908.

[0031] Among them, the sealing edge pressing cylinder 904 is arranged on the frame 10 and is rotationally connected to the frame 10. A sealing push rod 905 is arranged at the end of the piston rod of the sealing edge pressing cylinder 904. The end of the sealing push rod 905 is fixedly connected to the sealing rotating rod 906.

[0032] Embodiment 2:

[0033] This embodiment discloses a carton sealing device used on a carton forming and packaging machine. On the basis of the structure and principle of Embodiment 1, a bottle guiding mechanism 4 is further provided on the frame 10 of this embodiment. Above the bottle guiding mechanism 4, a bottle pushing mechanism 5 is provided. The bottle guiding mechanism 4 includes a guiding plate 401 provided on the frame 10. On both sides above the guiding plate 401, guiding and positioning plates 402 are provided. The bottle pushing mechanism 5 includes a transverse lead screw module 501 provided on the frame 10. At the output end of the transverse lead screw module 501, a pushing slide 503 is provided. The pushing slide 503 is driven to move by a transverse motor 502. Vertically fixed on the pushing slide 503 is a vertical lead screw module 504. At the output end of the vertical lead screw module 504, a vertical slide plate 506 is provided. The vertical slide plate 506 is driven to move by a vertical motor 505. A closing lead screw module 508 is further provided on the vertical slide plate 506. On both sides of the output end of the closing lead screw module 508, closing sliders 509 are symmetrically provided. The closing sliders 509 are both driven to move by a closing motor 507. At the bottom of the closing sliders 509, closing plates 510 are fixed respectively.

[0034] Among them, at the ends of the guiding and positioning plates 402, guiding shafts 403 are fixed respectively. On the guiding shafts 403, guiding pieces 404 rotatably connected to the guiding shafts 403 are provided. Springs 405 are further provided on the guiding and positioning plates 402. The ends of the springs 405 are connected to the guiding pieces 404. After the closing plates 510 drive the bottles to move to the position of the guiding pieces 404, the guiding pieces 404 are pushed to rotate. When the guiding pieces 404 rotate around the guiding shafts 403, the ends of the guiding pieces 404 contact two side sealing plates 103 of the carton close to the guiding plate 401 and then push the side sealing plates 103 of the carton to rotate, realizing that the ends of the guiding pieces 404 are inserted between the two side sealing plates 103 of the carton to open the side sealing plates 103 of the carton, ensuring that after the bottles reach the bottom plate 101 of the carton, the four side sealing plates 103 of the carton wrap the bottles.

[0035] Embodiment 3:

[0036] This embodiment discloses a carton sealing device used on a carton forming and packaging machine. On the basis of the structure and principle of Embodiment 1 or Embodiment 2, the sealing top cylinder 908 of this embodiment is provided on the sealing slide plate 910. The sealing slide plate 910 is slidably connected to the frame 10. A sealing lead screw 911 is further provided on the frame 10. The sealing lead screw 911 passes through the sealing slide plate 910 and is threadedly connected to the sealing slide plate 910. The side pressing block 903 is fixed to the pressing plate 902 by bolts. By adjusting the position of the sealing slide plate 910 through the sealing lead screw 911 and adjusting the position of the side pressing block 903, the carton sealing requirements for cartons of different sizes are realized.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, various changes, modifications, substitutions, and variations can be made to these embodiments, and these changes, modifications, substitutions, and variations should also be regarded as the protection scope of the present invention.

Claims

1. A carton sealing device used on a carton forming and packaging machine, comprising a frame, characterized in that: The frame is provided with a box forming mechanism, a glue spraying device and a box sealing device, and the glue spraying device and the box sealing device are both arranged above the box forming mechanism, and the box forming mechanism comprises two conveying chains arranged on the frame, and the conveying chains are driven to rotate by a forming motor, and a plurality of conveying clamps are also fixed to the conveying chains, and side sealing cylinders are symmetrically fixed to the frames on both sides of the conveying chain, and side sealing push plates are fixed to the ends of the piston rods of the side sealing cylinders, and a right guide rod is fixed to the frame on one side of the conveying chain, and a left guide rod is fixed to the frame on the other side of the conveying chain, and a side sealing cylinder is fixed to the frame between the left guide rod and the side sealing cylinder, and a side sealing push plate is fixed to the ends of the piston rods of the side sealing cylinders, and fixed cylinders are symmetrically fixed to the frames on both sides of the conveying chain. The ends of the piston rods of the cylinders are fixed with fixed push plates, and the frames below the fixed cylinders are fixed with bottom sealing cylinders, and the ends of the piston rods of the bottom sealing cylinders are fixed with bottom sealing push plates, and the glue spraying device comprises side glue spraying heads symmetrically fixed on the frames on both sides of the conveying chain, and a top glue spraying head is obliquely fixed on the frame above the conveying chain. The carton sealing device comprises a carton sealing lifting cylinder arranged on the frame, and a pressure plate is fixed on the end of the piston rod of the carton sealing lifting cylinder, and side pressure blocks are symmetrically arranged on both sides of the bottom of the pressure plate, and a carton sealing rotating rod is also arranged on the frame on one side of the pressure plate, and the carton sealing rotating rod is driven to rotate by the carton sealing side pressure cylinder, and a plurality of side pressure blocks are fixed on the carton sealing rotating rod, and a carton sealing top cylinder is also obliquely arranged on the frame on the other side of the pressure plate, and a carton sealing top push plate is fixed on the end of the piston rod of the carton sealing top cylinder.

2. The carton sealing device used on the carton forming and packaging machine according to claim 1, characterized in that: The frame is also provided with a bottle guiding mechanism, a bottle pushing mechanism is provided above the bottle guiding mechanism, the bottle guiding mechanism comprises a guide plate provided on the frame, guide positioning plates are provided on both sides above the guide plate, the bottle pushing mechanism comprises a transverse screw rod module provided on the frame, a pushing slide is provided at the output end of the transverse screw rod module, the pushing slide is driven to move by a transverse motor, a vertical screw rod module is vertically fixed on the pushing slide, a vertical slide is provided on the output end of the vertical screw rod module, the vertical slide is driven to move by a vertical motor, a closing screw rod module is also provided on the vertical slide, closing slides are symmetrically provided on both sides of the output end of the closing screw rod module, the closing slides are driven to move by the closing motor, and closing plates are fixed to the bottom of the closing slides.

3. The carton sealing device used on the carton forming and packaging machine according to claim 2, characterized in that: A guide shaft is fixed at the end of the guide positioning plate, and a guide piece rotatably connected to the guide shaft is arranged on the guide shaft. A spring is also arranged on the guide positioning plate, and the end of the spring is connected to the guide piece.

4. The carton sealing device used on the carton forming and packaging machine according to claim 1, characterized in that: The box sealing side pressing cylinder is arranged on the frame and is rotatably connected with the frame. A box sealing push rod is arranged at the end of the piston rod of the box sealing side pressing cylinder, and the end of the box sealing push rod is fixed to the box sealing rotating rod.

5. The carton sealing device used on the carton forming and packaging machine according to claim 1, characterized in that: The sealing top cylinder is arranged on the sealing slide plate, and the sealing slide plate is slidably connected to the frame. The frame is also provided with a sealing screw rod, and the sealing screw rod passes through the sealing slide plate and is threadedly connected to the sealing slide plate. The side pressure block is fixed to the pressure plate by bolts.

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