Processing, forming and collecting device for anti-deformation blister packaging box

Abstract

The invention discloses a processing, forming and collecting device for anti-deformation blister packaging boxes, and relates to the technical field of blister packaging box processing.The processing, forming and collecting device comprises a processing table, a supporting table is fixedly connected to the outer surface of the upper end of the processing table, first electric guide rails are arranged on the two sides of the processing table, and first moving blocks are slidably connected to the exteriors of the first electric guide rails; a moving frame is fixedly connected between the two groups of moving blocks I; according to the plastic uptake packaging box edge cutting device, the arranged edge cutting mechanism is matched with the collecting mechanism, in the process that a cutting blade cuts the edges of multiple sets of plastic uptake packaging boxes, the airflow attraction of an induced draft fan is matched with a spiral conveying blade, waste is synchronously collected in the edge cutting process, the waste can be effectively prevented from being splashed to the periphery in a large range, and the cutting efficiency is improved. And meanwhile, the collecting difficulty of the waste materials can be reduced, and the waste materials can be collected more thoroughly.

Description

Technical Field

[0001] The invention relates to the technical field of blister packaging box processing, in particular to a processing, forming and collecting device for an anti-deformation blister packaging box. Background Art

[0002] Blister packaging is a plastic product made by the blister process. The sheet of the blister packaging is heated at high temperature, vacuum-absorbed, and cooled to form a plastic box shape. Blister packaging has gradually become the preferred packaging method for storing electronic product shells due to its lightweight, low cost, and flexibility.

[0003] During the production process of the blister forming machine, a large amount of waste material will be left on the side of the plastic sheet after blister forming, which needs to be flattened and cut off to produce the final molded product. For example, a Chinese patent (Announcement No.: CN218053596U) discloses a waste material cutting device for a blister forming machine, which reasonably adjusts the distance between the two cutting components according to the product requirements, making it more applicable.

[0004] However, the above patent content does not provide a unified cleaning method for the waste materials generated by the trimming of blister packaging boxes during the actual processing process. In addition, the smooth cutting process of the cutting blade can easily cause the waste materials to splash around, further increasing the difficulty and scope of cleaning.

[0005] At the same time, the edges of most blister packaging boxes are relatively soft due to the material. The edges of the blister packaging boxes are in contact with the cutting blades. Due to the pressure of the cutting blades, they bend downward, which can easily cause uneven cutting edges on the edges of the blister packaging boxes, greatly affecting the processing quality of the finished blister packaging boxes.

[0006] To this end, we propose a solution. Summary of the Invention

[0007] The purpose of the present invention is to provide a processing, forming and collecting device for an anti-deformation blister packaging box to solve the technical defects proposed in the background art.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a processing, forming and collecting device for an anti-deformation blister packaging box, comprising a processing table, the outer surface of the upper end of the processing table is fixedly connected to a support table, and electric guide rails are provided on both sides of the processing table, the outer portion of the electric guide rails is slidably connected to a moving block, a moving frame is fixedly connected between the two groups of moving blocks, the top of the inner surface of the moving frame is provided with electric guide rails 2 near both sides, and the outer portion of the electric guide rails 2 is slidably connected to a moving block 2, an electric push rod 1 is provided on the outer surface of the lower end of the moving block 2, and the output end of the electric push rod 1 is fixedly connected to a trimming mechanism;

[0009] A second electric push rod is provided at a top end near the middle of the inner surface of the movable frame, and a bottom end of the second electric push rod is fixedly connected to a limit plate, and the limit plate includes a collecting mechanism for collecting cutting waste.

[0010] Furthermore, the trimming mechanism includes a movable frame, an L-shaped plate, a motor 1 and a cutting blade; the outer surface of the lower end of the electric push rod 2 is fixedly connected to the movable frame, and the outer surface of one side of the movable frame is fixedly connected to the L-shaped plate, the outer surface of one side of the L-shaped plate is provided with a motor 1, and the output end of the motor 1 passes through the interior of the L-shaped plate and is fixedly connected to the cutting blade, and an auxiliary component is provided at the position of the outer surface of the L-shaped plate corresponding to the cutting blade.

[0011] Furthermore, the collecting mechanism includes a material guide cylinder, a mounting frame and a fixed cylinder; the outer surface of the connecting frame is fixedly connected to the material guide cylinder on the side away from the L-shaped plate, and the outer surface of one side of the material guide cylinder is fixedly connected to the mounting frame, the outer surface of the material guide cylinder is located inside the mounting frame and is hollow, and an induced draft fan is provided on the outer surface of one side of the mounting frame, one end of the material guide cylinder is fixedly connected to the fixed cylinder, the outer surface of one end of the fixed cylinder is provided with motor 2, and the output end of motor 2 passes through the interior of the fixed cylinder and is fixedly connected to a rotating rod, a spiral conveying blade is provided between the rotating rod and the material guide cylinder, and the spiral conveying blade is rotatably connected to the material guide cylinder.

[0012] Furthermore, the inner diameter of the material guide cylinder is smaller than the inner diameter of the fixed cylinder, and the central axes of the fixed cylinder and the material guide cylinder are located on the same straight line. A discharge port is provided on the outer surface of the lower end of the fixed cylinder, and a collecting cylinder is detachably installed inside the discharge port. Several groups of crushing blades are fixedly connected to the outer surface of the rotating rod at a position above the side of the fixed cylinder.

[0013] Furthermore, several groups of elastic sheets are fixedly connected at equal distances inside the collecting cylinder, and the cross-section of the elastic sheets is trapezoidal. The bottom end of the collecting cylinder is movably connected to a guide rod, and the guide rod passes through the outside of the collecting cylinder and is movably connected thereto.

[0014] Furthermore, one end of the guide rod passes through the interior of the fixed cylinder and is fixedly connected to an arc plate, a push column is fixedly connected to the position corresponding to the arc plate on the outer surface of the rotating rod, and a connecting ring is provided above several groups of elastic sheets, and the connecting ring is fixedly connected to the guide rod.

[0015] Furthermore, the auxiliary component includes a fixed frame arranged inside the L-shaped plate, and a movable cylinder is arranged between the fixed frame and the L-shaped plate, a spring and a movable column are arranged inside the movable cylinder, and both ends of the spring are fixedly connected to the movable column and the movable cylinder respectively, one end of the movable column passes through the outside of the movable cylinder and is fixedly connected to the fixed frame, two groups of conveying rollers are arranged inside the fixed frame, and a conveyor belt is connected between the two groups of conveying rollers, and a motor three for driving the conveying rollers to rotate is provided on one side of the fixed frame.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. In the present invention, the trimming mechanism cooperates with the collecting mechanism. When the cutting blade cuts the edges of multiple groups of blister packaging boxes, the airflow attraction of the induced draft fan cooperates with the spiral conveying blades to collect the waste materials simultaneously during the trimming process. This can effectively prevent the waste materials from being splashed around on a large scale, reduce the adverse effects of the trimming operation on other equipment, and at the same time reduce the difficulty of collecting the waste materials and make the waste collection more thorough.

[0018] In addition, while the rotating rod drives the spiral conveying blade to convey the waste, the rotating rod can also be used to drive the cutting blade to further crush the waste, saving storage space while using the collection cylinder to collect the waste efficiently;

[0019] 2. In the present invention, by arranging the auxiliary components to adapt, during the edge cutting process, the conveyor belt is fitted with the corresponding edge under the action of the spring, the motor three drives the conveyor roller to rotate clockwise, and the conveyor belt is transmitted upward under the drive of the conveyor roller, and acts on the edge of the blister packaging box in the opposite direction to the force applied by the cutting blade, thereby preventing the edge of the blister packaging box from bending downward due to its softness during the cutting process, thereby improving the flatness of the edge cutting of the blister packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a combined view of the spiral conveying blade and the crushing blade of the present invention;

[0022] Figure 3 A combined view of the auxiliary component and the crushing blade of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the auxiliary component of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the collecting mechanism of the present invention;

[0025] Figure 6 This is a combined view of the elastic sheet and the connecting ring of the present invention;

[0026] Figure 7 This is a combined view of the curved plate and the push column of the present invention.

[0027] Reference numerals:

[0028] 1. Processing table; 2. Support table; 3. Electric guide rail 1; 4. Moving frame; 6. Trimming mechanism; 61. Moving frame; 62. L-shaped plate; 63. Motor 1; 64. Cutting blade; 7. Collecting mechanism; 71. Guide cylinder; 73. Fixed cylinder; 75. Induced draft fan; 76. Rotating rod; 77. Spiral conveying blade; 78. Collecting cylinder; 79. Crushing blade; 710. Elastic sheet; 711. Guide rod; 712. Arc plate; 713. Push column; 714. Connecting ring; 8. Auxiliary components; 81. Fixed frame; 82. Movable cylinder; 83. Movable column; 84. Conveyor roller; 85. Conveyor belt; 86. Spring; 9. Electric push rod 2; 10. Limit plate; 11. Electric push rod 1. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] Example 1: Figure 1-3 As shown, the present invention proposes a processing, forming and collecting device for an anti-deformation blister packaging box, comprising a processing table 1, the outer surface of the upper end of the processing table 1 is fixedly connected to a support table 2, and electric guide rails 3 are provided on both sides of the processing table 1, the outer side of the electric guide rail 3 is slidingly connected to a moving block 1, a moving frame 4 is fixedly connected between the two groups of moving blocks 1, the top of the inner surface of the moving frame 4 is provided with an electric guide rail 2 near both sides, and the outer side of the electric guide rail 2 is slidingly connected to a moving block 2, and the stacked multi-layer blister packaging box is placed on the support table 2.

[0031] An electric push rod 2 9 is provided at a position near the middle of the top of the inner surface of the movable frame 4, and the bottom end of the electric push rod 2 9 is fixedly connected to the limiting plate 10. An electric push rod 1 11 is provided on the outer surface of the lower end of the movable block 2, and the output end of the electric push rod 1 11 is fixedly connected to the trimming mechanism 6. The trimming mechanism 6 includes a movable frame 61, an L-shaped plate 62, a motor 1 63 and a cutting blade 64. The outer surface of the lower end of the electric push rod 2 9 is fixedly connected to the movable frame 61, and the outer surface of one side of the movable frame 61 is fixedly connected to the L-shaped plate 62.

[0032] The cross section of the support table 2 is T-shaped. There is a gap between the bottom blister packaging box and the processing table 1 to facilitate the movement of the L-shaped plate 62. A motor 63 is provided on the outer surface of one side of the L-shaped plate 62, and the output end of the motor 63 passes through the interior of the L-shaped plate 62 and is fixedly connected to a cutting blade 64, so that the cutting blade 64 corresponds to the edge of the blister packaging box to be cut. At this time, the blister packaging box at the bottom is located above the L-shaped plate 62, and the moving block 1 is driven again to move along the electric guide rail 3. At the same time, the motor 63 drives the cutting blade 64 to rotate and perform automatic edge trimming operations on the blister packaging box.

[0033] Example 2: Figure 1-7 As shown, the difference between this embodiment and embodiment 1 is that the limiting plate 10 includes a collecting mechanism 7 for collecting cutting waste, and the collecting mechanism 7 includes a material guide cylinder 71, a mounting frame and a fixed cylinder 73. The outer surface of the connecting frame is fixedly connected to the side of the L-shaped plate 62 with the material guide cylinder 71, and the outer surface of one side of the material guide cylinder 71 is fixedly connected to the mounting frame. The outer surface of the material guide cylinder 71 is hollowed out at the position inside the mounting frame, and an induced draft fan 75 is provided on the outer surface of one side of the mounting frame. During the trimming process, the induced draft fan 75 runs synchronously with the motor 63, so that the cut waste enters the interior of the material guide cylinder 71 through the moving frame 61 under the attraction of the airflow.

[0034] One end of the material guide cylinder 71 is fixedly connected to the fixed cylinder 73, and a motor 2 is provided on the outer surface of one end of the fixed cylinder 73, and the output end of the motor 2 passes through the interior of the fixed cylinder 73 and is fixedly connected to a rotating rod 76. A spiral conveying blade 77 is provided between the rotating rod 76 and the material guide cylinder 71, and the spiral conveying blade 77 is rotatably connected to the material guide cylinder 71. Motor 2 drives the rotating rod 76 to drive the spiral conveying blade 77 to convey the waste inside the material guide cylinder 71 to the direction of the fixed cylinder 73.

[0035] The inner diameter of the guide cylinder 71 is smaller than the inner diameter of the fixed cylinder 73, and the central axes of the fixed cylinder 73 and the guide cylinder 71 are located on the same straight line. Since the axial airflow gravitational force along the fixed cylinder 73 gradually decreases from the guide cylinder 71 to the fixed cylinder 73, the waste falls into the fixed cylinder 73. A discharge port is provided on the outer surface of the lower end of the fixed cylinder 73, and a collecting cylinder 78 is detachably installed inside the discharge port. The outer surface of the rotating rod 76 is fixedly connected to a plurality of groups of crushing blades 79 at a position above the side of the fixed cylinder 73. The crushing blades 79 rotate with the rotating rod 76 and crush the waste.

[0036] Example 3: Figure 5-7As shown, the difference between this embodiment and embodiment 1 and embodiment 2 is that a plurality of groups of elastic sheets 710 are fixedly connected at equal distances inside the collecting cylinder 78, and the cross-section of the elastic sheets 710 is trapezoidal, and the outer surfaces of two adjacent groups of elastic sheets 710 fit together. In the natural state, the outer surfaces of the elastic sheets 710 are inclined toward the bottom of the collecting cylinder 78, and through holes are formed between the plurality of groups of elastic sheets 710, so that the crushed waste falls into the interior of the collecting cylinder 78 under the action of gravity.

[0037] The bottom end of the collecting cylinder 78 is movably connected to a guide rod 711, and the guide rod 711 passes through the outside of the collecting cylinder 78 and is movably connected thereto. One end of the guide rod 711 passes through the through hole and extends to the interior of the fixed cylinder 73 and is fixedly connected to an arc plate 712. A push column 713 is fixedly connected to the outer surface of the rotating rod 76 at a position corresponding to the arc plate 712, and a connecting ring 714 is provided above several groups of elastic sheets 710.

[0038] The connecting ring 714 is fixedly connected to the guide rod 711 through the connecting column, and the outer surface of the guide rod 711 fits the outer surface of the elastic sheet 710. The inner diameter of the connecting ring 714 is larger than the inner diameter of the through hole. During the rotation of the rotating rod 76, the pushing column 713 repeatedly contacts the arc plate 712. The arc plate 712 is pushed by the pushing column 713 to drive the connecting ring 714 to squeeze the elastic sheet 710 downward. The crushed waste falls into the interior of the collecting tube 78 through the through hole and the gap between the two adjacent groups of elastic sheets 710 for collection. When the pushing column 713 separates from the arc plate 712, the elastic sheet 710 returns to its original state, and the connecting ring 714 drives the guide rod 711 to move upward.

[0039] Example 4: Figure 3 and Figure 4 As shown, the difference between this embodiment and embodiment 1, embodiment 2, and embodiment 3 is that an auxiliary component 8 is provided at a position corresponding to the outer surface of the L-shaped plate 62 and the cutting blade 64, and the auxiliary component 8 includes a fixed frame 81 arranged inside the L-shaped plate 62, and a movable cylinder 82 is provided between the fixed frame 81 and the L-shaped plate 62, and a spring 86 and a movable column 83 are provided inside the movable cylinder 82, and both ends of the spring 86 are fixedly connected to the movable column 83 and the movable cylinder 82 respectively, and one end of the movable column 83 passes through the outside of the movable cylinder 82 and is fixedly connected to the fixed frame 81.

[0040] The movable cylinder 82 is movably connected to the movable column 83. Two groups of conveying rollers 84 are provided inside the fixed frame 81. A conveyor belt 85 is connected between the two groups of conveying rollers 84. The conveyor belt 85 is fitted with the corresponding edge under the action of the spring 86. A motor three for driving the conveying roller 84 to rotate is provided on one side of the fixed frame 81. The motor three drives the conveying roller 84 to rotate clockwise. The conveyor belt 85 is transmitted upward under the drive of the conveying roller 84, and acts on the blister packaging box in the opposite direction to the force applied by the cutting blade 64, thereby preventing the edge of the blister packaging box from bending downward due to its softness during the cutting process.

[0041] The working process and principle of the present invention are as follows:

[0042] Step 1: Place the stacked multi-layer blister packaging box on the support table 2, control the electric push rod 2 9 to push the limit plate 10 downward to limit the blister packaging box, and then make the moving block 1 drive the moving frame 4 to move along the electric guide rail 1 3 until the cutting blade 64 is located at the right end of the blister packaging box;

[0043] Step 2: Control the movement block 2 and the electric push rod 11 to operate, so that the cutting blade 64 is aligned with the edge area to be cut of the blister packaging box. At this time, the blister packaging box at the bottom is located above the L-shaped plate 62. Drive the movement block 1 again to move along the electric guide rail 3. At the same time, the motor 1 63 drives the cutting blade 64 to rotate and perform an automated edge trimming operation on the blister packaging box.

[0044] Step 3: During the trimming process, the second motor and the induced draft fan 75 operate synchronously with the first motor 63. Therefore, the cut waste is attracted by the airflow through the movable frame 61 and enters the interior of the guide cylinder 71. The second motor drives the rotating rod 76 to drive the spiral conveying blade 77 to convey the waste inside the guide cylinder 71 toward the fixed cylinder 73. Since the axial airflow gravitational force along the fixed cylinder 73 gradually decreases from the guide cylinder 71 to the fixed cylinder 73, the waste falls into the interior of the fixed cylinder 73 and is crushed by the crushing blade 79.

[0045] The fourth step is to remove the crushed waste from the collecting barrel 78 under the action of gravity. During the rotation of the rotating rod 76, the pushing column 713 repeatedly contacts the curved plate 712. The curved plate 712 is pushed by the pushing column 713 and drives the connecting ring 714 to squeeze the elastic sheet 710 downward. The crushed waste falls into the collecting barrel 78 through the through hole and the gap between the two adjacent sets of elastic sheets 710 for collection. When the pushing column 713 separates from the curved plate 712, the elastic sheet 710 returns to its original shape, and the connecting ring 714 drives the guide rod 711 to move upward, thereby preventing the airflow from causing the crushed waste to splash everywhere and reducing the generation of static electricity. At the same time, the up and down movement of the guide rod 711 can make the waste evenly distributed inside the collecting barrel 78, avoiding the situation where the actual storage space of the collecting barrel 78 is reduced due to uneven accumulation of waste.

[0046] Step 5. During the edge trimming process, the conveyor belt 85 is fitted with the corresponding edge under the action of the spring 86, and the motor three drives the conveyor roller 84 to rotate clockwise. The conveyor belt 85 is transmitted upward under the drive of the conveyor roller 84, and acts on the blister packaging box in the opposite direction to the force applied by the cutting blade 64, preventing the edge of the blister packaging box from bending downward due to its softness during the cutting process, thereby improving the flatness of the edge cutting of the blister packaging box.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A processing, forming and collecting device for an anti-deformation blister packaging box, comprising a processing table (1), characterized in that: The upper outer surface of the processing table (1) is fixedly connected to the support table (2), and an electric guide rail (3) is provided on both sides of the processing table (1), the outer side of the electric guide rail (3) is slidably connected to a moving block (1), a moving frame (4) is fixedly connected between the two groups of moving blocks (1), the top of the inner surface of the moving frame (4) is provided with an electric guide rail (2) near both sides, and the outer side of the electric guide rail (2) is slidably connected to the moving block (2), the lower outer surface of the moving block (2) is provided with an electric push rod (11), and the output end of the electric push rod (11) is fixedly connected to the trimming mechanism (6); An electric push rod 2 (9) is provided at a position near the middle of the top end of the inner surface of the movable frame (4), and the bottom end of the electric push rod 2 (9) is fixedly connected to a limiting plate (10), and the limiting plate (10) includes a collecting mechanism (7) for collecting cutting waste.

2. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 1, characterized in that: The trimming mechanism (6) comprises a moving frame (61), an L-shaped plate (62), a motor (63) and a cutting blade (64); the outer surface of the lower end of the electric push rod (9) is fixedly connected to the moving frame (61), and the outer surface of one side of the moving frame (61) is fixedly connected to the L-shaped plate (62); the outer surface of one side of the L-shaped plate (62) is provided with a motor (63), and the output end of the motor (63) passes through the interior of the L-shaped plate (62) and is fixedly connected to the cutting blade (64); the outer surface of the L-shaped plate (62) is provided with an auxiliary component (8) at a position corresponding to the cutting blade (64).

3. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 2, characterized in that: The collecting mechanism (7) comprises a material guide cylinder (71) and a fixed cylinder (73); the outer surface of the connecting frame is fixedly connected to the material guide cylinder (71) on a side away from the L-shaped plate (62), and the outer surface of one side of the material guide cylinder (71) is fixedly connected to the mounting frame, the outer surface of the material guide cylinder (71) is hollowed out at a position inside the mounting frame, and an induced draft fan (75) is provided on the outer surface of one side of the mounting frame, one end of the material guide cylinder (71) is fixedly connected to the fixed cylinder (73), the outer surface of one end of the fixed cylinder (73) is provided with a second motor, and the output end of the second motor passes through the interior of the fixed cylinder (73) and is fixedly connected to a rotating rod (76), a spiral conveying blade (77) is provided between the rotating rod (76) and the material guide cylinder (71), and the spiral conveying blade (77) is rotatably connected to the material guide cylinder (71).

4. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 3, characterized in that: The inner diameter of the guide cylinder (71) is smaller than the inner diameter of the fixed cylinder (73), and the central axes of the fixed cylinder (73) and the guide cylinder (71) are located on the same straight line. A discharge port is provided on the outer surface of the lower end of the fixed cylinder (73), and a collecting cylinder (78) is detachably installed inside the discharge port. A plurality of groups of crushing blades (79) are fixedly connected to the outer surface of the rotating rod (76) at a position above the side of the fixed cylinder (73).

5. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 4, characterized in that: Several groups of elastic sheets (710) are fixedly connected at equal distances inside the collecting cylinder (78), and the cross section of the elastic sheets (710) is trapezoidal. The bottom end of the collecting cylinder (78) is movably connected to a guide rod (711), and the guide rod (711) passes through the outside of the collecting cylinder (78) and is movably connected thereto.

6. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 5, characterized in that: One end of the guide rod (711) passes through the interior of the fixed cylinder (73) and is fixedly connected to the arc plate (712); a push column (713) is fixedly connected to the outer surface of the rotating rod (76) at a position corresponding to the arc plate (712); a connecting ring (714) is provided above the plurality of groups of elastic sheets (710); and the connecting ring (714) is fixedly connected to the guide rod (711).

7. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 2, characterized in that: The auxiliary component (8) includes a fixed frame (81) arranged inside the L-shaped plate (62), and a movable cylinder (82) is arranged between the fixed frame (81) and the L-shaped plate (62). A spring (86) and a movable column (83) are arranged inside the movable cylinder (82), and two ends of the spring (86) are fixedly connected to the movable column (83) and the movable cylinder (82) respectively. One end of the movable column (83) passes through the outside of the movable cylinder (82) and is fixedly connected to the fixed frame (81).

8. The processing, forming and collecting device for an anti-deformation blister packaging box according to claim 7, characterized in that: Two groups of conveying rollers (84) are arranged inside the fixed frame (81), and a conveyor belt (85) is connected between the two groups of conveying rollers (84). A motor three for driving the conveying rollers (84) to rotate is arranged on one side of the fixed frame (81).

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