Automatic Feeding Device of Unmanned Sorting and Unpacking Machine for Dry Nonwoven Production Line

Abstract

The present invention relates to an automatic feeding device for an unpacking machine of a dry non-woven production line. The feeding device includes: a material distribution table, a hydraulic lift for controlling the lifting of the raw material package, a striking roller for shredding the raw materials, a servo motor for controlling the rotation of the striking roller, a cylinder for controlling the lifting of the striking roller, and strong magnets are inlaid on both the material distribution table and the striking roller. A striking roller with multiple strong magnets attached to its inner wall is provided, and the speed of the striking roller can be adjusted according to the production speed. The strong magnets attached to the inner wall of the striking roller and the material distribution table with strong magnets can use the strong magnetic attraction function of the strong magnets to forcibly sort out the metal objects mixed in the raw materials. In this way, not only can the labor intensity of workers be reduced, but also workers can be prevented from contacting the raw materials.

Description

(1) Technical Field

[0001] The present invention is applicable to an automatic feeding device for an unmanned sorting and unpacking machine in a dry non-woven production line, realizing automatic feeding for a loosening device. (2) Background Art

[0002] Since the raw materials (such as polyester, viscose, cotton, bamboo fiber, etc.) of the current domestic dry non-woven production line are mostly loosened and fed manually by tearing and feeding, this not only results in a large number of workers in the enterprise and high labor intensity of the workers; moreover, after each time the feeding worker leaves the machine and contacts the non-production raw materials, it is impossible to ensure 100% that the worker cleans and disinfects both hands when tearing and feeding again, thus ensuring the cleanliness of the raw materials. (3) Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an automatic feeding device for an unmanned sorting and unpacking machine in a dry non-woven production line, which can realize automatic feeding and save labor.

[0004] The technical solution adopted by the present invention to solve the above technical problem is:

[0005] An automatic feeding device for an unpacking machine without manual sorting in a dry non-woven production line, the feeding device includes:

[0006] A material distribution table,

[0007] A hydraulic lift for controlling the lifting of the raw material bale,

[0008] A striking roller for tearing the raw materials,

[0009] A servo motor for controlling the rotation of the striking roller,

[0010] A cylinder for controlling the lifting of the striking roller,

[0011] Powerful magnets are inlaid on both the material distribution table and the striking roller.

[0012] On one side close to the feeding flat curtain 3 of the unpacking machine, a hydraulic lift 10 is closely arranged. When the hydraulic lift contracts to the lowest point, the workbench of the hydraulic lift is flush with the horizon 11. On the upper frame on the side of the unpacking machine feeding flat curtain 3 far from the diagonal nail curtain 1 of the unpacking machine, a material distribution table 4 is inclinedly installed. The material distribution table 4 is inclined downward towards the center of the unpacking machine feeding flat curtain 3, and a number of powerful magnets are embedded on the lower surface of the material distribution table; a raw material bale 5 is placed on the workbench of the hydraulic lift, and the raw material bale can move up and down under the action of the hydraulic lift. On the upper cover plate 8 above the hydraulic lift 10, a first cylinder 7 is installed. The first cylinder 7 extends downward, and a striking roller 6 is fixedly installed at its extending end. Multiple groups of powerful magnets are inlaid on the inner wall of the roller body of the striking roller, and a number of steel needles are evenly inlaid on the outer surface of the striking roller;

[0013] The left and right cover plates of the bag opener are relatively provided with first position detection elements, the installation height of which is not higher than the upper edge of the striking roller, and the second position detection element is installed on the frame at the upper edge of the material distribution table.

[0014] The feeding device also includes a control unit, which is electrically connected to the two position detection elements. The control unit is also connected to the two cylinders, the servo motor, and the hydraulic lift 10. The control unit monitors the data of the first position detection element to determine whether the servo motor is working, and controls whether the hydraulic lift needs to be lifted and the lifting height by monitoring the data of the second position detection element.

[0015] The feeding device also includes a weighing sensor, which is installed on the working platform of the hydraulic lift and is used to sense the change in the weight of the raw materials on the working platform. The weighing sensor is electrically connected to the control unit, and the control unit can obtain the weight change data detected by the weighing sensor in real time. When the weighing sensor detects that the weight change exceeds the weight change threshold, the control unit controls the hydraulic lift to increase a unit range to achieve automatic feeding. The present invention can realize automatic feeding of the production line through the coordinated use of weight control and two position detection elements.

[0016] The first position detection element and the second position detection element may be the same or different, and may be implemented by a single element or a combination of elements, such as a laser, a photoelectric switch, etc. When the first position detection element is implemented by a photoelectric switch, a reflective plate must be installed in conjunction with it.

[0017] The striking roller 6 is made of a surface-treated steel tube as the roller body, and steel needles are evenly embedded on the outer wall of the roller body. The length of the striking roller is consistent with the width direction of the raw material package, and two first cylinders 7 are symmetrically fixed along the length direction of the striking roller.

[0018] The first position detection element is located obliquely above the material distribution table 4 and is fixed on the left or right cover plate above the feeding flat curtain 3 of the bag opener. A safety cover plate 12 is also provided on the edge of the upper cover plate close to the cylinder. The raw material bag does not interfere with the safety cover plate during the up and down movement, and the safety cover plate does not interfere with the rotation of the striking roller.

[0019] The second position detection element is located near the lower edge of the striking roller, and the upper edge of the material distribution platform is not higher than the lower edge of the striking roller. The high position of the raw material package is sensed by the second position detection element. When the highest point of the raw material package is lower than the second position detection element, the hydraulic lift 10 will automatically rise to lift the highest point of the raw material to the position of the second position detection element; the servo motor is directly connected and fixed to the shaft head on one side of the striking roller with a key pin or a flange, and the first position detection element is used to sense whether the raw material is accumulated to the highest point to control whether the servo motor rotates.

[0020] Install extension plates on the upper parts of the left and right cover plates of the unpacking machine. The lower edge of the extension plate is flush with the installation position of the second position detection element. An elevating transparent safety door is installed between the two extension plates and the upper cover plate.

[0021] Push-pull rails are fixedly installed along the height direction on the end faces of the extension plates of the left and right cover plates. A push-pull type transparent safety door is installed between the push-pull rails.

[0022] A fixed safety cover plate 12 is fixedly installed on the upper half of the extension plate of the left and right cover plates. The lower edge of the safety cover plate 12 is at the same installation height as the lower edge of the cylinder body of the first cylinder 7. The upper edge of the safety cover plate 12 is directly fastened and connected to the upper cover plate 8; and the safety cover plate 12 is fixedly installed outside the first cylinder 7. A second cylinder 15 is installed on the upper cover plate 8 outside the safety cover plate 12. The extending end of the second cylinder 15 is connected to a safety door 14 that can be lifted up and down. The lower edge of the safety door 14 that can be lifted up and down is not higher than the lower edge height when the striking roller is working; An emergency stop button is installed on the safety door.

[0023] The striking roller includes a roller body, a steel needle plate and multiple strong magnets. The inside of the roller body is a hollow structure, and strong magnets are evenly inlaid on the inner wall. The steel needles are fixed on the outer surface of the roller body through the steel needle plate; The material distribution table is a stainless steel thin plate with a thickness of 1.0 - 1.2 mm. Embedded grooves 18 for installing and fixing strong magnets are welded on the lower surface of the thin plate. The embedded grooves are evenly arranged along the length direction of the lower surface of the material distribution table.

[0024] In front of the unpacking machine, dig a square pit with a length of 1 m, a width of 1 m and a depth of 0.8 m at a position 0.1 m away from the unpacking machine. Install the hydraulic lift 10 in the square pit so that the upper plane of the hydraulic lift is flush with the ground.

[0025] Above the unpacking machine feeding flat curtain 3 for raw material transportation of the unpacking machine, install a slope-type stainless steel material distribution table 4. One whole piece or three strong magnets are installed horizontally at the bottom of the stainless steel material distribution table 4. The length of the strong magnet is the same as the width of the material distribution table, and the width of the material distribution table is the same as the width of the unpacking machine.

[0026] The upper cover plate 8 of the unpacking machine extends beyond the hydraulic lift, and the length of the striking roller is 800 - 1200 mm.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1) The present invention provides a striking roller with multiple powerful magnets attached to its inner wall. The speed of the striking roller can be adjusted according to the production speed. The powerful magnets attached to the inner wall of the striking roller and the material distribution table with powerful magnets can use the powerful magnetism of the magnets to forcibly separate the metal objects mixed in the raw materials. In this way, manual sorting of metals is achieved, which not only reduces the labor intensity of workers but also avoids workers' contact with the raw materials. Moreover, by setting the rotational speed of the striking roller to be adjustable, the feeding speed can be synchronized with the main production speed, thus reducing the labor intensity of workers.

[0029] 2) The present invention overcomes the difficulty of manual feeding of shredded raw materials, which requires workers to bend down and look up multiple times during the feeding process. It can effectively reduce the labor intensity of workers, solve the problem of large labor demand in enterprises, effectively reduce the labor intensity of workers, and avoid direct contact between workers and raw materials, ensuring the cleanliness of production raw materials. (IV) Description of the Drawings

[0030] Figure 1 It is a schematic installation structure diagram of an embodiment of the automatic feeding system of the bale opener for the non-woven production line of the present invention.

[0031] Figure 2 It is a schematic structure diagram of the striking roller in the present invention.

[0032] In the figure, 1. Inclined nail curtain of the bale opener, 2. Flat curtain of the bale opener, 3. Feeding flat curtain of the bale opener, 4. Material distribution table, 5. Raw material bale, 6. Striking roller, 7. First cylinder, 8. Upper cover plate, 9. Anchor bolt, 10. Hydraulic lift, 11. Horizon line, 12. Safety cover plate, 13. Second photoelectric switch, 14. Safety door, 15. Second cylinder, 16. First photoelectric switch, 17. Safety door switch, 18. Embedded groove, 19. Servo motor. (V) Specific Embodiment

[0033] The present invention will be further explained below in conjunction with the embodiments and the drawings, but this is not intended to limit the protection scope of the present application.

[0034] The automatic feeding system of the bale opener for the non-woven production line of the present invention is used on the bale opener. The frame of the bale opener is fixed to the ground by anchor bolts 9. On the frame, a feeding flat curtain 3 of the bale opener, a flat curtain 2 of the bale opener, and an inclined angle nail curtain 1 of the bale opener are fixedly installed. The feeding flat curtain 3 of the bale opener and the flat curtain 2 of the bale opener are arranged staggered in the up and down positions, and the flat curtain 2 of the bale opener and the feeding flat curtain 3 of the bale opener have an overlapping position, but they are not at the same height. The flat curtain 2 of the bale opener is located below the feeding flat curtain 3 of the bale opener. In front of the flat curtain 2 of the bale opener, the inclined angle nail curtain 1 of the bale opener is fixedly installed. An upper cover plate 8 is arranged on the upper part of the inclined angle nail curtain 1 of the bale opener. On the left and right sides of the feeding flat curtain 3 of the bale opener and the flat curtain 2 of the bale opener, left and right cover plates are respectively arranged. The upper cover plate and the left and right cover plates are used to prevent personal injury during machine operation and prevent the leakage of production raw materials. This part of the structure of the above bale opener is the existing structure of the bale opener.

[0035] On one side close to the feeding flat curtain 3 of the bale opener of the present invention, a hydraulic lift 10 is closely arranged. When the raw material in the raw material bale on the workbench of the hydraulic press is used up, the hydraulic lift automatically descends until the workbench of the hydraulic lift is flush with the horizon 11, which is convenient for workers to push the raw material bale onto the workbench of the hydraulic lift with a vehicle. On the upper part of the frame on the side of the feeding flat curtain 3 of the bale opener far away from the inclined angle nail curtain 1 of the bale opener, a feeding table 4 is inclinedly installed. The feeding table 4 is inclined downward towards the center of the feeding flat curtain 3 of the bale opener. A number of powerful magnets are embedded on the lower surface of the feeding table; a raw material bale 5 is placed on the workbench of the hydraulic lift. The raw material bale can move up and down under the action of the hydraulic lift. During the up and down movement of the hydraulic lift, it does not interfere with the frame of the bale opener and is closely close to the frame of the bale opener. On the upper cover plate 8 above the hydraulic lift 10, a first cylinder 7 is installed. The first cylinder 7 extends downward, and a striking roller 6 is fixedly installed at its extending end. A number of groups of powerful magnets are embedded on the inner wall of the roller body of the striking roller, and a number of steel needles are evenly embedded on the outer surface of the striking roller for tearing the raw materials; the striking roller can be finely adjusted up and down under the action of the cylinder, which is convenient for workers to install and maintain and load materials;

[0036] The striking roller 6 uses a steel pipe with a surface treatment as the roller body. Steel needles are evenly embedded on the outer wall of the roller body. The length of the striking roller is consistent with the width direction of the raw material bale. Two first cylinders 7 are symmetrically fixed along the length direction of the striking roller for hanging and lifting the striking roller.

[0037] A safety cover plate 12 is also arranged on the edge of the upper cover plate close to the cylinder. During the up and down movement of the raw material bale, it does not interfere with the safety cover plate, and the safety cover plate does not interfere with the rotation of the striking roller;

[0038] On the left and right cover plates above the feeding flat curtain 3 of the bale opener, a first photoelectric switch 16 and a reflector (not marked in the figure) are oppositely arranged. The height of the first photoelectric switch is not higher than the upper edge of the striking roller, and the first photoelectric switch is located obliquely above the material distributing table 4. When the high point position of the raw material accumulation on the feeding flat curtain of the bale opener exceeds the position of the first photoelectric switch, the raw material will block the first photoelectric switch and it cannot detect the opposite reflector. At this time, the first photoelectric switch 16 transmits a signal to stop the rotation to the servo motor of the striking roller, commanding the servo motor of the striking roller to stop rotating, thereby stopping the feeding. On the contrary, if the highest point of the raw material accumulation on the feeding flat curtain of the bale opener is lower than the position of the first photoelectric switch, at this time the first photoelectric switch can detect the opposite reflector. At this time, the servo motor of the striking roller will drive the striking roller to feed the raw material through continuous rotation. The striking force generated by the rotation of the striking roller can make the broken material enter the material distributing table to achieve feeding.

[0039] A second photoelectric switch 13 is installed on the frame near the lower edge of the striking roller. The upper edge of the material distributing table is not higher than the lower edge of the striking roller. The height of the raw material bale is monitored through the second photoelectric switch 13. When the highest point of the raw material bale is lower than the second photoelectric switch 13 of the second laser control system, the hydraulic lift 10 will automatically rise to lift the highest point of the raw material to the position of the second photoelectric switch. The second photoelectric switch is used to detect whether the raw material bale is within the area where the striking roller acts. If the second photoelectric switch cannot detect the material, it controls the hydraulic lift 10 to move upward to automatically lift the raw material bale to achieve automatic replenishment of the raw material. The servo motor is directly connected and fixed to the shaft head on one side of the striking roller with a key pin or a flange. Whether the servo motor rotates is controlled by the first photoelectric switch sensing whether the raw material has accumulated to the highest point, and then it is determined whether the striking roller works.

[0040] Extension plates are added to the upper parts of the left and right cover plates of the existing bale opener so that it can protect the area where the striking roller acts. The lower edge of the extension plate is flush with the installation position of the second photoelectric switch. A lifting transparent safety door is installed between the extension plate and the upper cover plate:

[0041] (Solution 1) Push-pull tracks are fixedly installed along the height direction on the end faces of the extension plates of the left and right cover plates. A vertically push-pull and transparent safety door is installed between the push-pull tracks. Pulling down the safety door can completely cover the striking roller inside the safety door, effectively preventing personnel from contacting the striking roller. When cleaning during shutdown, the door can be pushed above the striking roller to do the cleaning work and perform manual control.

[0042] (Solution 2) A fixed safety cover plate 12 is fixedly installed on the upper half of the extension plates of the left and right cover plates. The lower edge of the safety cover plate 12 is at the same installation height as the lower edge of the cylinder body of the first cylinder 7. The upper edge of the safety cover plate 12 is directly fastened and connected to the upper cover plate 8. And the safety cover plate 12 is fixedly installed outside the first cylinder 7, and the lower edge of the safety cover plate 12 is not lower than the highest point of the steel needles of the striking roller. A second cylinder 15 is installed on the upper cover plate 8 outside the safety cover plate 12. The extending end of the second cylinder 15 is connected to a safety door 14 that can move up and down. The safety door 14 that can move up and down is adjusted to move up and down through the action of the second cylinder fixed on the upper cover plate 8. The lower edge of the safety door 14 that can move up and down is not higher than the lower edge height of the striking roller during operation. When the safety door 14 drops, it just completely blocks the striking roller inside the safety door. The safety door 14 and the safety cover plate 12 are installed in an overlapping manner, and movable track grooves are installed on both sides of the safety door 14. In this way, the safety door 14 can move up and down in the movable track grooves under the lifting action of the cylinder, realizing the opening and closing of the safety door 14. At the lower right corner of the safety door 14, a safety door switch 17 is installed, and the opening (lifting the safety door is opening) and closing (lowering the safety door is closing) of the safety door 14 can be controlled through this operation switch. The coverage area of the safety door is the action area of the striking roller and the first cylinder. One is to play a safety protection role, and the other is for workers to observe the running status of the striking roller 6, whether there is entanglement, etc. An emergency stop button is installed on the safety door, and it is convenient to stop the machine for cleaning and restore the equipment status when abnormalities are found.

[0043] The present invention further includes a control unit, which is electrically connected to two photoelectric switches. At the same time, the control unit is connected to two cylinders, a servo motor, and a hydraulic lifter 10.

[0044] In this embodiment, a first photoelectric switch and a reflector are used to form a first position detection element, and a second photoelectric switch is used as a second position detection element. The position detection element can be a laser, a photoelectric switch, etc., which is used to detect the height of the material and can feedback the detected signal to the control unit.

[0045] The feeding device further includes a weighing sensor, which is installed on the workbench of the hydraulic lifter and is used to sense the change in the weight of the raw material on the workbench. The weighing sensor is electrically connected to the control unit. The control unit can obtain the weight change data detected by the weighing sensor in real time. When the weighing sensor detects that the weight change exceeds the weight change threshold, the control unit controls the hydraulic lifter to increase by one unit range to realize automatic feeding. Through the combined use of weight control and two position detection elements, the present invention can realize automatic feeding of the production line, and the accurate automatic feeding can reach 99.99%.

[0046] Through weight control, each time the striking roller adds material to the feeding table, the material in the raw material package becomes lighter. When the weight change threshold is reached, the hydraulic lift is controlled to rise. Since different raw materials have different properties and specific gravities, the threshold is set according to the actual situation. The specific gravities of fibers, viscose, and polyester are different. For example, when the threshold weight of polyester is reduced by 30 g, the hydraulic lift rises by one unit range; when the weight of viscose and cotton fibers is reduced by 10 mg, it rises by one unit range (0.1 - 0.3 cm).

[0047] The control unit can be a PLC, a single-chip microcomputer, an industrial computer, a DSP, etc.

[0048] In the present invention, the above-mentioned first optoelectronic switch and the reflector can use a laser to achieve the same function, and the second optoelectronic switch can also use a laser to achieve the function.

[0049] Embodiment 1

[0050] The feeding device in this embodiment is used in combination with the existing bale opener in the industry, and includes: a hydraulic lift on which a raw material package is placed, and the hydraulic lift is arranged adjacent to the existing bale opener.

[0051] The striking roller 6 includes a roller body 601, steel needles 602, and a steel needle plate 603 connecting the two. The roller body is composed of a seamless steel pipe with a diameter of φ325 * 8 mm. Eight steel needle plates with a width of 400 mm are fixed on the roller body through fixing bolts, and the steel needles are fixed on the steel needle plates. The outer diameter of the striking roller is φ395 mm, the length of the steel needles is 35 mm, the thickness of the steel needle plate is 10 mm, and a total of four rows (or more than four rows) of steel needle plates are provided. A plurality of strong magnets are attached to the inner wall of the striking roller, and it is installed directly above the hydraulic lift.

[0052] Two controllable lifting first cylinders 7 are used to suspend and lift the striking roller, and are installed below the upper cover plate.

[0053] A set of stainless steel feeding tables 4 with a plurality of strong magnets are installed above the feeding flat curtain 3 of the bale opener, and are used for the raw materials scattered by the striking roller and falling onto the feeding table 4 to slide onto the feeding flat curtain 3 of the bale opener.

[0054] After the raw materials slide onto the feeding flat curtain 3 of the bale opener, they pass through the flat curtain 2 of the bale opener and then are carried into the diagonal spike curtain 1 of the bale opener.

[0055] In front of the existing bale opener, a square pit with a length of 1 m, a width of 1 m, and a depth of 0.8 m is dug at a position 0.1 m away from the bale opener (the size of the square pit can be set according to the actual size of the hydraulic lift), and the hydraulic lift 10 is installed in the square pit so that the upper plane of the hydraulic lift is flush with the ground, which is convenient for using a bale clamping trolley to push the raw material package onto the hydraulic lift.

[0056] Above the feeding flat curtain 3 for raw material conveying of the bale opener, a ramp-shaped stainless steel material distribution table 4 is installed. To avoid feeding metal, a whole piece of powerful magnet of the same size as the material distribution table or three (or more) powerful magnets with a length of 80 mm and a width of 15 mm are horizontally installed at the bottom of the stainless steel material distribution table 4. The length of the magnet is the same as the width of the material distribution table, and the width of the material distribution table is the same as the width of the bale opener. In this embodiment, the material distribution table is made of stainless steel thin plate with a thickness of 1.0 - 1.2 mm. Embedded grooves 18 for installing and fixing the powerful magnets are welded on the lower surface of the thin plate. The number of the embedded grooves is evenly arranged along the length direction of the lower surface of the material distribution table. On the premise of ensuring the smooth sliding of the raw materials, the metal in the raw materials can be effectively separated to avoid feeding into the production line. The feeding system needs to be manually cleaned regularly to ensure that the metal in the raw materials can be sucked out without hindering the sliding process of the raw materials.

[0057] The material distribution table can also be made of polymer materials. When made of polymer materials, embedded grooves for powerful magnets need to be set on the surface, and powerful magnets are installed in the embedded grooves. The upper surface of the powerful magnet is flush with the surface of the material distribution table.

[0058] The upper cover plate 8 of the bale opener is extended beyond the hydraulic lift. In this embodiment, it is extended by one meter on the basis of the original upper cover plate of the bale opener. Two cylinders of SC200 - 150 are installed directly above the hydraulic lift for hoisting the stainless steel striking roller 6. The first cylinder 7 can lift and lower the striking roller 6. The length of the striking roller is equivalent to the width of the raw material bale, about 800 - 1200 mm.

[0059] The striking roller 6 uses seamless steel pipe as the roller body, and four rows (or more) of steel needles are fixedly installed on the outer wall of the stainless steel pipe for shredding the raw materials. The rotation of the striking roller uses a servo motor 19, which is installed on one side of the striking roller. The servo motor is directly connected and fixed to the shaft head on one side of the striking roller with a key pin or flange. If the highest point position of the raw material accumulation exceeds the position of the first photoelectric switch, the raw materials will block the first photoelectric switch and the reflector cannot be detected. At this time, the first photoelectric switch sends a signal to stop the rotation to the servo motor of the striking roller, commanding the servo motor of the striking roller to stop rotating, thus stopping the feeding. On the contrary, if the highest point position of the raw material accumulation is lower than the position of the photoelectric switch, at this time the first photoelectric switch can detect the opposite reflector. At this time, the servo motor of the striking roller will drive the striking roller to feed the raw materials through continuous rotation. The rotation speed of the servo motor is controlled by the first photoelectric switch sensing the high and low positions of the raw materials above the flat curtain 2 of the bale opener.

[0060] The present invention uses a set of stainless steel needle plate striking roller that can lift and adjust the speed in cooperation with the hydraulic lift when starting the machine, which can change the previous manual feeding to mechanical feeding. It can not only effectively reduce the labor intensity of workers and thus greatly improve the work efficiency, but also save a bale opening and feeding worker for the loosening process. It realizes full mechanical feeding and saves labor.

[0061] What is not described in this invention applies to the prior art.

Claims

1. An automatic feeding device for an unmanned sorting and unpacking machine of a dry non-woven production line, characterized in that, the feeding device comprises: a material distribution table, a hydraulic lift for controlling the lifting of raw material packages, a striking roller for shredding raw materials, a servo motor for controlling the rotation of the striking roller, a cylinder for controlling the lifting of the striking roller, powerful magnets are embedded on both the material distribution table and the striking roller; A hydraulic lift is closely arranged on one side close to the feeding flat curtain of the unpacking machine. When the hydraulic lift shrinks to the lowest point, the workbench of the hydraulic lift is flush with the horizon. A material distribution table is inclinedly installed on the upper frame on one side of the unpacking machine feeding flat curtain far from the diagonal nail curtain of the unpacking machine. The material distribution table slopes downward towards the center of the unpacking machine feeding flat curtain, and a number of powerful magnets are embedded on the lower surface of the material distribution table; A raw material package is placed on the workbench of the hydraulic lift, and the raw material package can move up and down under the action of the hydraulic lift. A first cylinder is installed on the upper cover plate above the hydraulic lift. The first cylinder extends downward, and its extending end is fixedly installed with a striking roller. Multiple groups of powerful magnets are embedded on the inner wall of the roller body of the striking roller, and a number of steel needles are evenly embedded on the outer surface of the striking roller; First position detection elements are relatively arranged on the left and right cover plates of the unpacking machine, and the installation height of the first position detection elements is not higher than the upper edge of the striking roller. A second position detection element is installed on the frame along the upper edge of the material distribution table.

2. The feeding device according to claim 1, characterized in that, it further comprises a control unit. The control unit is electrically connected to the two position detection elements. At the same time, the control unit is connected to the two cylinders, the servo motor, and the hydraulic lift. By monitoring the data of the first position detection element, the control unit determines whether the servo motor works. By monitoring the data of the second position detection element, the control unit controls whether the hydraulic lift needs to be lifted.

3. The feeding device according to claim 1, characterized in that, the feeding device further comprises a weighing sensor. The weighing sensor is installed on the workbench of the hydraulic lift and is used to sense the change in the weight of the raw materials on the workbench. The weighing sensor is electrically connected to the control unit. The control unit can obtain the weight change data detected by the weighing sensor in real time. When the weighing sensor detects that the weight change exceeds the weight change threshold, the control unit controls the hydraulic lift to increase by one unit range to achieve automatic feeding.

4. The feeding device according to claim 1, characterized in that, the striking roller uses a steel pipe with a surface treatment as the roller body, steel needles are evenly embedded on the outer wall of the roller body, the length of the striking roller is consistent with the width direction of the raw material package, and two first cylinders are symmetrically fixed along the length direction of the striking roller; The first position detection element is located obliquely above the material distribution table and is fixed on the left or right cover plate above the unpacking machine feeding flat curtain. A safety cover plate is also arranged on the edge of the upper cover plate close to the cylinder. During the up and down movement of the raw material package, it does not interfere with the safety cover plate, and the safety cover plate does not interfere with the rotation work of the striking roller; The second position detection element is located near the lower edge of the striking roller, and the upper edge of the material distribution table is not higher than the lower edge of the striking roller. The upper position of the raw material package is monitored by the second position detection element. When the highest point of the raw material package is lower than the second position detection element, the hydraulic lift will automatically rise to lift the highest point of the raw material to the position of the second position detection element; the servo motor is directly connected and fixed to the shaft head on one side of the striking roller by a key pin or a flange, and whether the servo motor rotates is controlled by the first position detection element sensing whether the raw material accumulates to the highest point.

5. The feeding device according to claim 1, characterized in that, extension plates are installed on the upper parts of the left and right cover plates of the bale opener, the lower edge of the extension plate is flush with the installation position of the second position detection element, and a lifting transparent safety door is installed between the two extension plates and the upper cover plate.

6. The feeding device according to claim 1, characterized in that, the position detection element is a laser or / and a photoelectric switch.

7. The feeding device according to claim 1, characterized in that, push-pull rails are fixedly installed on the end faces of the extension plates of the left and right cover plates along the height direction, and a push-pull type transparent safety door is installed between the push-pull rails; or a fixed safety cover plate is fixedly installed on the upper half of the extension plates of the left and right cover plates, the lower edge of the safety cover plate is at the same installation height as the lower edge of the cylinder body of the first cylinder, and the upper edge of the safety cover plate is directly fastened to the upper cover plate; and the safety cover plate is fixedly installed outside the first cylinder, a second cylinder is installed on the upper cover plate outside the safety cover plate, the extending end of the second cylinder is connected to a safety door that can be lifted up and down, and the lower edge of the safety door that can be lifted up and down is not higher than the lower edge height when the striking roller is working; an emergency stop button is installed on the safety door.

8. The feeding device according to claim 1, characterized in that, the striking roller includes a roller body, a steel needle plate and multiple strong magnets. The inside of the roller body is a hollow structure, and strong magnets are evenly inlaid on the inner wall. The steel needles are fixed on the outer surface of the roller body through the steel needle plate; the material distribution table is a stainless steel thin plate with a thickness of 1.0 - 1.2 mm, and grooves for installing and fixing strong magnets are welded on the lower surface of the thin plate, and the grooves are evenly arranged along the length direction of the lower surface of the material distribution table.

9. The feeding device according to claim 1, characterized in that, a square pit is dug at a position 0.1 meter away from the bale opener in front of the bale opener, and the hydraulic lift is installed in the square pit so that the upper plane of the hydraulic lift is flush with the ground. A sloped stainless steel material distribution table is installed above the feeding flat curtain of the raw material conveying of the bale opener, and a whole strong magnet or multiple strong magnets are transversely installed at the bottom of the stainless steel material distribution table. The length of the strong magnet is the same as the width of the material distribution table, and the width of the material distribution table is the same as the width of the bale opener; when there are multiple strong magnets, they are evenly distributed along the length direction of the material distribution table. The upper cover plate of the bale opener extends beyond the hydraulic lift, and the length of the striking roller is 800 - 1200 mm.

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