A conveying and sorting platform for heat treatment processing of aluminum-plastic packaging and a use method thereof

Abstract

The present application relates to the technical field of heat treatment, and discloses a conveying and sorting platform for heat treatment of aluminum-plastic packaging and a use method, which comprises a suspension conveying body frame, two suspension sliding rails in parallel are fixed at the bottom of the suspension conveying body frame, and suspension sliding blocks are slidably arranged on the two suspension sliding rails. The present application is characterized in that a bag supporting part with a ventilation pump is arranged above the twisting bag part, and directional airflow is applied to the sealing position immediately after heat sealing is completed, and the sealing area is reciprocally twisted with a limited amplitude by cooperating with the friction conveying belt, so that the sealing position is subjected to tearing stress and airflow impact at the same time. If the sealing strength is insufficient, the airflow will flow into the bag from the weak part to cause the bag body to expand, and the visual sensor can capture the expansion signal in real time and trigger the sorting action. This detection method can effectively identify hidden defective products with good appearance but insufficient strength, and eliminate the risk of missed detection.

Description

Technical Field

[0001] This invention relates to the field of heat treatment technology, and in particular to a conveying and sorting platform and its usage method for heat treatment of aluminum-plastic packaging. Background Technology

[0002] In the heat treatment process of aluminum-plastic packaging materials, after the aluminum-plastic packaging bags are filled, their openings need to be heat-sealed to ensure the airtightness of the packaging and the shelf life of the product. Currently, the heat-sealing process of aluminum-plastic packaging bags usually uses intermittent or continuous heat-sealing equipment. The basic process includes: manual or mechanical bag loading, opening, pressurizing and heating by the heat-sealing head, cooling and shaping, and finally conveying to the next process via conveyor belt. However, the existing heat-sealing equipment and conveying sorting system have the following shortcomings: Existing testing methods are not destructive enough to heat-sealed products. Some online testing uses non-contact visual inspection, which can only identify appearance defects of the seal, such as wrinkles, offsets, and gaps. This makes it impossible to effectively identify defective products with insufficient seal strength but intact appearance. On the other hand, peel or pressure tests conducted by sampling are destructive and cannot inspect all products. The existing conveying and sorting platforms have low functional integration. For example, processes such as bag loading, bag support, heat sealing, detection, conveying, and sorting are often scattered across multiple independent devices or workstations. The equipment occupies a large area, and the connection between each process requires manual intervention or complex intermediate conveying units, which increases equipment investment and operation and maintenance costs.

[0003] To this end, we designed a conveying and sorting platform for heat treatment of aluminum-plastic packaging and its usage method. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing detection methods in heat sealing, and the fact that some online detection methods use non-contact visual inspection, which can only identify surface defects in the seal. Therefore, this invention proposes a conveying and sorting platform and its usage method for heat treatment processing of aluminum-plastic packaging.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A conveying and sorting platform for heat treatment of aluminum-plastic packaging includes a suspended conveyor body frame, two parallel suspended slide rails fixed at the bottom of the suspended conveyor body frame, a suspended slider sliding on each of the two suspended slide rails, a conveying part for pushing the suspended sliders to move on the suspended conveyor body frame, and opposite twisting bag parts at the bottom of the two suspended sliders, with an aluminum-plastic packaging bag clamped between the two twisting bag parts. The twisting bag section includes two friction conveyor belts, and a flat heat sealing device for heat sealing the opening of the aluminum-plastic packaging bag is set between the two friction conveyor belts. The friction conveyor belts abut against the aluminum-plastic packaging bag, and the friction conveyor belts on both sides of the aluminum-plastic packaging bag move in the same direction and drive the aluminum-plastic packaging bag to twist. A bag-supporting part is provided above the twisting part, and the bag-supporting part includes two electric rods that are inserted into the opening of the aluminum-plastic packaging bag and opened. An air pump is provided on the bag-supporting part to blow air toward the opening of the aluminum-plastic packaging bag.

[0006] Preferably, the conveying unit includes: The conveyor wheel is set in two, and the two conveyor wheels are set at both ends of the bottom of the suspended conveyor body frame. A conveyor belt is set between the two conveyor wheels and the conveyor belt is located between two suspended slide rails. Multiple locking blocks are fixedly set on the conveyor wheel in a circle. Multiple slots that are adapted to the locking blocks are provided on the side of the conveyor belt that is in contact with the conveyor wheel. A drive motor is installed on the suspended conveyor frame, and the output end of the drive motor is coaxially fixed with one of the conveyor wheels.

[0007] Preferably, a roller frame assembly is provided between the two suspension slide rails, and roller assemblies that abut against the side walls of the suspension slide rails are symmetrically arranged on both sides of the roller frame assembly. A snap-fit ​​block that snaps into the slot on the conveyor belt is fixedly provided at the bottom of the roller frame assembly, and the roller frame assembly is connected to the suspension slider on the suspension slide rail.

[0008] Preferably, the twist bag portion further includes: The roller bracket has double-headed friction wheels at both ends. Each double-headed friction wheel includes a drive rod and two pulleys. The two pulleys are symmetrically arranged at both ends of the drive rod and at both ends of the friction conveyor belt. The limiting plates are arranged in multiple ways and are linearly fixed on the roller bracket. The limiting plates abut against the inner sidewalls of the two friction conveyor belts arranged vertically. The flat plate heat sealing device is installed on the limiting plates and is flush with the outer sidewall of the friction conveyor belt.

[0009] Preferably, the bottom of the suspension slider is provided with a bottom frame, and the bottom frame is provided with a connecting rod connected to the twist bag part, and the bag support part is located between the two connecting rods.

[0010] Preferably, a magnet frame is provided on the roller bracket, a second electromagnetic generator is provided at the end of the connecting rod, and a spring reset assembly is provided between the second electromagnetic generator and the magnet frame. The spring reset assembly includes a positioning rod and a third reset spring. One end of the positioning rod is fixed to the second electromagnetic generator, and the other end of the positioning rod slides telescopically with the magnet frame. The third reset spring is coaxially sleeved on the positioning rod and is in a stretched state.

[0011] Preferably, the bag support portion further includes: A horizontal connecting plate is fixed at both ends to a connecting rod, and a vertical connecting plate is vertically arranged on the horizontal connecting plate. Sliding holes are opened at both ends of the vertical connecting plate, and sliding block assemblies slide in the sliding holes. The electric insertion rod slides vertically up and down on the sliding block assembly.

[0012] Preferably, the transverse connecting plate is further provided with a first electromagnetic generator, and a first reset spring is connected between the first electromagnetic generator and the sliding block assembly. A magnet is provided on the sliding block assembly. An air pump is provided at the bottom of the longitudinal connecting plate, and a visual sensor for detecting the expansion of the aluminum-plastic packaging bag is also provided on the longitudinal connecting plate.

[0013] Preferably, the suspension slide rail is provided with an elastic insert rod, and the suspension slider is provided with a push head that abuts against the elastic insert rod; The roller frame assembly has symmetrically inserted transverse abutments on both sides of the suspension slide rail, and a second return spring is connected between the two transverse abutments. A first contact piece that slides with the roller frame assembly is provided on the transverse abutment, and a second contact piece is also provided on the roller frame assembly. The second electromagnetic generator is connected to the first and second contact pieces through a power-off controller.

[0014] The beneficial effects of this invention are as follows: 1. This invention provides a bag support section with an air pump above the twisted bag section. Immediately after heat sealing, a directional airflow is applied to the sealing position. At the same time, a friction conveyor belt performs limited reciprocating twisting on the sealing area. This causes the sealing area to be subjected to tearing stress and airflow impact. If the sealing strength is insufficient, the airflow will rush into the bag from the weak point, causing the bag to expand. The visual sensor can capture this expansion signal in real time and trigger the sorting action. This detection method can effectively identify hidden defects that are in good condition but lack strength, eliminating the risk of missed detection.

[0015] 2. This invention employs a method where, after sealing with a flat-plate heat-sealing device, a friction conveyor belt, positioned opposite each other and running in the same direction, applies a controllable torsional force to the sealed area of ​​the aluminum-plastic packaging bag. This torsion operation, on the one hand, causes the molten material at the sealing point to undergo directional molecular orientation during cooling, which helps improve the peel strength of the seal; on the other hand, it eliminates localized internal stress generated during heat sealing, reducing shrinkage, deformation, and warping of the seal during subsequent storage and transportation, thereby improving long-term sealing reliability. This torsion operation is designed as a limited-angle rotation, causing only elastic or slight plastic deformation at the sealing point, without causing seal breakage, thus constituting a non-destructive seal reinforcement treatment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention; Figure 2This is a front view of a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention. Figure 3 This is an isometric view of the upper and lower isometric views of a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention. Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the twisting of aluminum-plastic packaging bags in a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention. Figure 6 This is a bottom view of the twisted bag on the friction conveyor belt in a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention. Figure 7 This is a schematic diagram of the bag support section in a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention. Figure 8 This is a schematic diagram of the twisted bag section in a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention; Figure 9 This is a schematic diagram of the roller frame assembly in a conveying and sorting platform for heat treatment of aluminum-plastic packaging proposed in this invention.

[0017] In the diagram: 1. Suspended conveyor frame; 2. Drive motor; 3. Conveyor wheel; 4. Conveyor belt; 5. Suspended slide rail; 6. Suspended slider; 7. Aluminum-plastic packaging bag; 8. Bag support section; 81. Transverse connecting plate; 82. Longitudinal connecting plate; 83. First electromagnetic generator; 84. Sliding hole; 85. Sliding block assembly; 86. Electric insertion rod; 87. First return spring; 88. Air pump; 9. Bottom frame; 10. Connecting rod; 11. Snap-fit ​​block; 12. Roller frame assembly; 13. Flexible insert rod; 14. Push head; 15. Twisting bag section; 151. Friction conveyor belt; 152. Double-headed friction wheel; 153. Roller bracket; 154. Limiting plate; 155. Flat plate heat sealing device; 156. Magnet frame; 157. Second electromagnetic generator; 158. Spring return assembly; 16. Roller assembly; 17. Lateral stop bar; 18. First contact piece; 19. Second return spring; 20. Second contact piece; A1, First direction; A2, Second direction; B1, First rotation direction; B2, Second rotation direction. Detailed Implementation

[0018] Reference Figures 1-9A conveying and sorting platform for heat treatment of aluminum-plastic packaging includes a suspended conveyor frame 1. Two parallel suspended slide rails 5 are fixed at the bottom of the suspended conveyor frame 1. Suspended sliders 6 slide on both suspended slide rails 5. The frame 1 is the basic support structure of the entire equipment and is usually made of high-strength metal profiles welded or bolted together to ensure structural stability during operation. A preset distance is maintained between the two suspended slide rails 5 to guide and support subsequent sliding parts. The suspended sliders 6 can slide freely back and forth along the extension direction of the suspended slide rails 5.

[0019] Reference Figure 3 As shown, the suspended conveyor frame 1 is equipped with a conveying section that pushes the suspended slider 6 to move. The conveying section includes two conveyor wheels 3, which are located at the bottom ends of the suspended conveyor frame 1. A conveyor belt 4 is arranged between the two conveyor wheels 3 and between two suspended slide rails 5, along the extension direction of the suspended slide rails 5. Multiple locking blocks are fixedly arranged in a circular pattern on the conveyor wheels 3. Multiple slots that fit the locking blocks are provided on the side of the conveyor belt 4 that is in contact with the conveyor wheels 3. A drive motor 2 is provided on the suspended conveyor frame 1, and the output end of the drive motor 2 is coaxially fixed with one of the conveyor wheels 3. Then, the drive motor 2 is turned on to drive the conveyor wheels 3 and the conveyor belt 4 on the conveyor wheels 3 to move.

[0020] A roller frame assembly 12 is provided between the two suspension slide rails 5. The roller frame assembly 12 has a rectangular frame structure, and roller assemblies 16 are symmetrically arranged on both sides of the roller frame assembly 12 to abut against the side wall of the suspension slide rail 5. Each roller assembly 16 includes at least one set of rollers that roll in contact with the side wall of the suspension slide rail 5, so that the roller frame assembly 12 can slide smoothly along the extension direction of the suspension slide rail 5.

[0021] The bottom of the roller frame assembly 12 is fixedly provided with a snap-fit ​​block 11 that snaps into the slot on the conveyor belt 4. The roller frame assembly 12 is connected to the suspension slider 6 on the suspension slide rail 5. At the same time, the roller frame assembly 12 snaps into the slot on the conveyor belt 4 through the snap-fit ​​block 11. The snap-fit ​​block and the slot form a synchronous belt drive structure to prevent the conveyor belt 4 from slipping on the conveyor wheel 3. Then, the roller frame assembly 12 pushes the suspension slider 6 to slide through the roller assembly 16 that abuts against the side wall of the suspension slide rail 5. Finally, the aluminum-plastic packaging bag 7 below is suspended and moved. The output shaft of the drive motor 2 is coaxially fixedly connected to one of the conveyor wheels 3 through a coupling, thereby providing driving force for the entire conveying mechanism.

[0022] When the conveyor belt 4 moves under the drive of the drive motor 2, the roller frame assembly 12 moves synchronously. At the same time, the roller frame assembly 12 and the suspension slider 6 are fixedly connected by mechanical connectors, thereby driving the suspension slider 6 and all the functional components carried below to move together along the suspension slide rail 5.

[0023] Reference Figure 5 In this state, the bottom of the two hanging sliders 6 is provided with opposite twisted bag parts 15, and the aluminum-plastic packaging bag 7 is held between the two twisted bag parts 15. The two twisted bag parts 15 form an operating space for holding the aluminum-plastic packaging bag 7. The open end of the aluminum-plastic packaging bag 7 faces upward, and its two sides of the bag wall are respectively contacted by the twisted bag parts 15 on both sides.

[0024] A bag-supporting part 8 is provided above the twisting bag part 15, and a bottom frame 9 is provided at the bottom of the hanging slider 6. A connecting rod 10 connected to the twisting bag part 15 is provided on the bottom frame 9. The bag-supporting part 8 is located between the two connecting rods 10. The twisting bag part 15 includes two friction conveyor belts 151. A gap is left between the two friction conveyor belts 151 to accommodate the side wall of the aluminum-plastic packaging bag 7. A flat heat-sealing device 155 for heat-sealing the opening of the aluminum-plastic packaging bag 7 is provided between the two friction conveyor belts 151. The heat-sealing device is used to heat-press and seal the opening edge of the aluminum-plastic packaging bag 7.

[0025] Reference Figure 6 and Figure 7 In the state, the bag-supporting part 8 includes two electric inserts 86 that are inserted into and opened by the aluminum-plastic packaging bag 7. The aluminum-plastic packaging bag 7 is placed between two twisting parts 15 below the suspension slide rail 5. Then, the two electric inserts 86 can be inserted downward into the opening of the aluminum-plastic packaging bag 7. The electric inserts 86 on the sliding block assembly 85 are opened, so that the electric inserts 86 are pressed down and extended into the opening of the aluminum-plastic packaging bag 7, and move in opposite directions in the horizontal direction, thereby opening the bag opening to a predetermined size. The bag-supporting part 8 is provided with an air pump 88 that blows air towards the opening of the aluminum-plastic packaging bag 7. The air outlet of the air pump 88 is set downward, facing the opening direction of the aluminum-plastic packaging bag 7, and is used to blow airflow into the bag opening during the testing process to cooperate in completing the heat seal firmness test.

[0026] Reference Figure 6 and Figure 7 In the state, the bag support part 8 also includes a transverse connecting plate 81, the two ends of which are fixed to the connecting rod 10, and a longitudinal connecting plate 82 is vertically arranged on the transverse connecting plate 81. Sliding holes 84 are opened at both ends of the longitudinal connecting plate 82, and a sliding block assembly 85 slides in the sliding hole 84. The electric insertion rod 86 slides vertically up and down on the sliding block assembly 85.

[0027] Reference Figure 5 , Figure 6 and Figure 8 In this state, the friction conveyor belt 151 abuts against the aluminum-plastic packaging bag 7, and the friction conveyor belts 151 on both sides of the aluminum-plastic packaging bag 7 move in the same direction, causing the aluminum-plastic packaging bag 7 to twist. Figure 6In this state, both friction conveyor belts 151 rotate in the first direction B1 and the second direction B2, and the rotation directions are the same. The friction conveyor belts 151 located on both sides of the aluminum-plastic packaging bag 7 run in the same direction under the driving action, thereby applying a torsional force to the sealing part of the aluminum-plastic packaging bag 7 to achieve a twisting effect. Because there is friction between the friction conveyor belts 151 and the bag wall of the aluminum-plastic packaging bag 7, refer to... Figure 5 In this state, the twisting directions of the aluminum-plastic packaging bag 7 are the first direction A1 and the second direction A2, respectively. At this time, the bag walls on both sides of the heat-sealed aluminum-plastic packaging bag 7 move in opposite directions. This friction will cause the sealing part of the aluminum-plastic packaging bag 7 to twist at a certain angle relative to the bag body, forming a twisting effect. It should be noted that the twisting angle is controlled within a preset range and will not cause the seal to break. Instead, it will cause the material at the sealing point to generate a certain internal stress rearrangement, which helps to improve the flatness and sealing performance of the seal.

[0028] Reference Figure 8 In this state, the twisting bag section 15 also includes a roller bracket 153. Both ends of the roller bracket 153 are provided with double-headed friction wheels 152. The double-headed friction wheels 152 include a drive rod and two pulleys. The two pulleys are symmetrically arranged at both ends of the drive rod and are located at both ends of the friction conveyor belt 151. The friction conveyor belt 151 is sleeved on the two pulleys on the same side to form a closed loop structure. At the same time, the two friction conveyor belts 151 located on the same side of the aluminum-plastic packaging bag 7 are arranged vertically with the aluminum-plastic packaging bag 7 and abut against the outer wall. Then, the opening of the aluminum-plastic packaging bag 7 faces upward, and the opening is pressed and closed by the four friction conveyor belts 151 on both sides.

[0029] Multiple limiting plates 154 are linearly fixed to the roller bracket 153. The limiting plates 154 are embedded in the space between the upper and lower friction conveyor belts 151. Their side walls slide in contact with the inner side walls of the two friction conveyor belts 151 to limit the lateral displacement of the friction conveyor belts 151 during operation and ensure their stable running trajectory. The limiting plates 154 abut against the inner side walls of the two upper and lower friction conveyor belts 151. The flat plate heat sealing device 155 is installed on the limiting plates 154 and is flush with the outer side wall of the friction conveyor belts 151 to ensure that the heat sealing surface can be tightly fitted to the bag wall of the aluminum-plastic packaging bag 7 during heat sealing operation. That is, when the flat plate heat sealing device 155 on the limiting plates 154 is opened, since the flat plate heat sealing device 155 is flush with the outer side wall of the friction conveyor belts 151, the two flat plate heat sealing devices 155 can achieve a heat sealing effect on the opening of the aluminum-plastic packaging bag 7, thus improving the heat sealing quality.

[0030] Reference Figure 8In the above configuration, a magnet frame 156 is mounted on the roller bracket 153, and a second electromagnetic generator 157 is mounted on the end of the connecting rod 10. A spring reset assembly 158 is provided between the second electromagnetic generator 157 and the magnet frame 156. The spring reset assembly 158 includes a positioning rod and a third reset spring. One end of the positioning rod is fixed to the second electromagnetic generator 157, and the other end of the positioning rod slides telescopically with the magnet frame 156. The third reset spring is coaxially sleeved on the positioning rod and is in a stretched state. The third reset spring is coaxially sleeved on the outer periphery of the positioning rod, and its two ends abut against the second electromagnetic generator 157 and the magnet frame 156 respectively. In the free state, the spring is in a stretched state, that is, it always applies an elastic pulling force to the magnet frame 156 to keep it away from the second electromagnetic generator 157.

[0031] The second electromagnetic generator 157 is turned on, and the magnetic field it generates pushes the magnet frame 156 to slide on the positioning rod, thereby causing the two friction conveyor belts 151 arranged opposite to each other to come closer together, thereby completing the compression and closure of the opening side wall of the aluminum-plastic packaging bag 7. Then, the drive motor on the roller bracket 153 is turned on, and the drive motor drives the double-headed friction wheel 152 to rotate through the meshing gear assembly, which in turn drives the friction conveyor belt 151 to rotate in the same direction, thereby causing the heat-sealed aluminum-plastic packaging bag 7 to twist.

[0032] Reference Figure 5 In the state where the twisting operation is underway or shortly thereafter, the air pump 88 at the bottom of the longitudinal connecting plate 82 is activated, causing it to blow out an airflow of predetermined pressure and flow rate downwards. This airflow directly impacts the sealing position of the aluminum-plastic packaging bag 7. Since the inside of the aluminum-plastic packaging bag 7 is still under normal pressure at this time, if the sealing quality is good, the airflow cannot enter the bag, and the bag remains in its original state. At the same time, the friction conveyor belt 151 continues to drive the sealing part to reciprocate and twist within a limited range, so that the sealing point is subjected to slight periodic tearing stress. This mechanical stress, together with the airflow impact, can effectively expose any weak points that may exist in the seal. If the sealing strength is insufficient, under the combined action of tearing stress and airflow impact, a small crack or tear will appear at the seal.

[0033] A first electromagnetic generator 83 is also provided on the transverse connecting plate 81, and a first return spring 87 is connected between the first electromagnetic generator 83 and the sliding block assembly 85. A magnetic piece is provided on the sliding block assembly 85. When the first electromagnetic generator 83 is turned on, a magnetic field is generated on both sides of the first electromagnetic generator 83. Since the magnetic piece is provided on the sliding block assembly 85, the magnetic field generated by the magnetic piece interacts with the magnetic field generated by the first electromagnetic generator 83 to generate a driving force. The air pump 88 is fixedly installed at the bottom center of the longitudinal connecting plate 82, and its air outlet is vertically downward. A vision sensor is also installed on the longitudinal connecting plate 82. The vision sensor is set downward and is used to monitor the expansion state of the aluminum-plastic packaging bag 7 in real time after air is introduced.

[0034] Therefore, the sliding block assembly 85 can slide within the sliding hole 84, thereby driving the electric insert rod 86 on the sliding block assembly 85 to move in opposite directions and open the bag opening of the aluminum-plastic packaging bag 7. The air pump 88 is located at the bottom of the longitudinal connecting plate 82, and a visual sensor for detecting the expansion of the aluminum-plastic packaging bag 7 is also provided on the longitudinal connecting plate 82.

[0035] Turn on the air pump 88 at the bottom of the longitudinal connecting plate 82 and let the air pump 88 blow air downwards. The airflow will impact the sealing position of the aluminum-plastic packaging bag 7 which is heat-sealed by the flat heat-sealing device 155. Then, in conjunction with the friction conveyor belt 151, the heat-sealed position of the aluminum-plastic packaging bag 7 will be twisted. The drive motor drives the friction conveyor belt 151 to rotate in a limited manner, which will not cause the heat-sealed seal to break, but will only cause the heat-sealed area to tear. With the airflow introduced by the air pump 88, the heat-sealing strength of the aluminum-plastic packaging bag 7 is tested.

[0036] The airflow blown out by the air pump 88 will enter the aluminum-plastic packaging bag 7 through the torn crack, causing the internal pressure of the bag to increase and the bag to expand rapidly. At this time, the vision sensor installed on the longitudinal connecting plate 82 captures the expansion and deformation of the aluminum-plastic packaging bag 7 in real time and sends the detection signal to the control system. After receiving the signal, the control system determines that the aluminum-plastic packaging bag 7 is a heat-sealed unqualified product. Subsequently, the control system sends a command to the external magnetic attraction device to release the magnetic attraction on the elastic plug 13. Under the action of its built-in return spring, the elastic plug 13 protrudes upward from the mounting hole of the suspension slide rail 5, forming a movable mechanical stop.

[0037] If the heat seal is torn or not secure, the airflow from the air pump 88 will impact the torn heat seal, causing gas to enter the aluminum-plastic packaging bag 7 through the torn heat seal, thus expanding the aluminum-plastic packaging bag 7. At this time, the vision sensor on the longitudinal connecting plate 82 detects the expansion of the aluminum-plastic packaging bag 7, and then releases the attraction of the elastic insert rod 13 through the external magnetic attraction device, allowing the elastic insert rod 13 to protrude from the suspension slide rail 5.

[0038] Reference Figure 3 and Figure 4 In the suspended slide rail 5, an elastic insert 13 is provided for vertical movement, and a push head 14 is provided on the suspended slider 6 to abut against the elastic insert 13. Lateral abutment rods 17 are symmetrically inserted into the roller frame assembly 12 on both sides of the suspended slide rail 5, and a second return spring 19 connects the two lateral abutment rods 17. In the free state, this spring keeps the two lateral abutment rods 17 tending to extend outwards. A first contact piece 18 is fixed to the inner end of each lateral abutment rod 17, and the first contact piece 18 slides in contact with the side wall of the roller frame assembly 12.

[0039] A first contact piece 18 that slides on the roller frame assembly 12 is provided on the transverse abutment 17. A second contact piece 20 is also provided on the roller frame assembly 12. The second electromagnetic generator 157 is connected to the first contact piece 18 and the second contact piece 20 through a power-off controller. The second electromagnetic generator 157 is electrically connected to the first contact piece 18 and the second contact piece 20 through a power-off controller. When the first contact piece 18 and the second contact piece 20 come into contact with each other, the power-off controller is triggered to cut off the power supply to the second electromagnetic generator 157.

[0040] Reference Figure 9 In the state where the protruding elastic insert 13 touches and abuts against the push head 14 on the suspension slider 6, it can push the two transverse abutment rods 17 to move towards each other, thereby causing the first contact piece 18 on the transverse abutment rod 17 to connect with the second contact piece 20, thereby disconnecting the second electromagnetic generator 157. Thus, under the action of the third reset spring, the squeezing effect of the friction conveyor belt 151 on the aluminum-plastic packaging bag 7 is released, thereby releasing the heat-sealed unqualified aluminum-plastic packaging bag 7 and letting it fall below for subsequent processing.

[0041] When the suspension slider 6 moves to the position where the elastic rod 13 protrudes, the push head 14 on the suspension slider 6 makes physical contact with the elastic rod 13. As the suspension slider 6 continues to move forward, the push head 14 pushes the elastic rod 13 to move along the axial direction of the transverse abutment 17, thereby pushing the two transverse abutments 17 to move closer together and compressing the second return spring 19.

[0042] During the closing process of the transverse abutment 17, its first contact piece 18 contacts the second contact piece 20 fixed on the roller frame assembly 12, forming an electrical connection. This connection signal is transmitted to the power-off controller, which immediately cuts off the power supply to the second electromagnetic generator 157. Once the second electromagnetic generator 157 loses power, the magnetic field it generates disappears, and the magnet frame 156 retracts away from the aluminum-plastic packaging bag 7 under the elastic restoring force of the third return spring, causing the twisting bag parts 15 on both sides to separate from each other, thereby releasing the squeezing and clamping force of the friction conveyor belt 151 on the aluminum-plastic packaging bag 7. The aluminum-plastic packaging bag 7, no longer clamped, automatically falls from the platform under the action of gravity and enters the non-conforming product collection container below, completing automatic sorting and subsequent processing. As for unmarked non-conforming products, since the elastic insert 13 does not protrude, the suspension slider 6 can pass smoothly, and the aluminum-plastic packaging bag 7 is continued to be transported to the next qualified product collection station.

[0043] The specific working method of this invention is as follows: S1: First, place the aluminum-plastic packaging bag 7 between the two twisting parts 15 below the hanging slide rail 5. Then, turn on the electric insert rod 86 on the sliding block assembly 85, so that the electric insert rod 86 is pressed down and inserted into the opening of the aluminum-plastic packaging bag 7. Then, turn on the first electromagnetic generator 83, so that magnetic fields are generated on both sides of the first electromagnetic generator 83. Since there are magnetic pieces on the sliding block assembly 85, the sliding block assembly 85 can be driven to slide in the sliding hole 84, which in turn can drive the electric insert rod 86 on the sliding block assembly 85 to move in opposite directions and open the bag opening of the aluminum-plastic packaging bag 7. At the same time, the two friction conveyor belts 151 located on the same aluminum-plastic packaging bag 7 are arranged vertically with the aluminum-plastic packaging bag 7 and abut against the outer wall, so that the opening of the aluminum-plastic packaging bag 7 faces upward, and the opening is pressed and closed by the four friction conveyor belts 151 on both sides. S2: Then open the flat heat sealing device 155 on the limiting plate 154. Since the flat heat sealing device 155 is flush with the outer wall of the friction conveyor belt 151, the two flat heat sealing devices 155 can achieve the heat sealing effect on the opening of the aluminum-plastic packaging bag 7. S3: Then turn on the second electromagnetic generator 157. The magnetic field generated by it pushes the magnet frame 156 to slide on the positioning rod, thereby causing the two friction conveyor belts 151 arranged opposite to each other to come closer together, thereby completing the compression and closure of the opening side wall of the aluminum-plastic packaging bag 7. Then turn on the drive motor on the roller bracket 153, so that the drive motor drives the double-headed friction wheel 152 to rotate through the meshing gear assembly, which in turn drives the friction conveyor belt 151 to rotate in the same direction, thereby causing the heat-sealed aluminum-plastic packaging bag 7 to twist. S4: Then turn on the air pump 88 at the bottom of the longitudinal connecting plate 82 and let the air pump 88 blow air downwards. In this way, the airflow will impact the sealing position of the aluminum-plastic packaging bag 7 which is heat-sealed by the flat heat-sealing device 155. Then, in conjunction with the friction conveyor belt 151, the heat-sealed position of the aluminum-plastic packaging bag 7 will be twisted. The drive motor drives the friction conveyor belt 151 to rotate in a limited manner, which will not cause the heat-sealed seal to break. It will only cause the heat-sealed area to tear. In conjunction with the airflow introduced by the air pump 88, the heat-sealing firmness of the aluminum-plastic packaging bag 7 is tested. S5: If the heat seal is torn or not secure, the airflow from the air pump 88 will impact the torn heat seal, causing gas to enter the aluminum-plastic packaging bag 7 through the torn heat seal, which will then expand the aluminum-plastic packaging bag 7. At this time, the vision sensor on the longitudinal connecting plate 82 detects the expansion of the aluminum-plastic packaging bag 7, and then releases the attraction of the elastic rod 13 through the external magnetic attraction device, allowing the elastic rod 13 to protrude out of the suspension slide rail 5. S6: Then turn on the drive motor 2, so that the drive motor 2 drives the conveyor wheel 3 and the conveyor belt 4 on the conveyor wheel 3 to move. At the same time, the roller frame assembly 12 is engaged with the slot on the conveyor belt 4 through the snap-fit ​​block 11. Then the roller frame assembly 12 pushes the suspension slider 6 to slide through the roller assembly 16 that abuts against the side wall of the suspension slide rail 5, and finally moves the aluminum-plastic packaging bag 7 below in a suspended manner. S7: When the protruding elastic rod 13 touches and abuts against the push head 14 on the suspension slider 6, it can push the two transverse abutment rods 17 to move towards each other, thereby driving the first contact piece 18 and the second contact piece 20 on the transverse abutment rod 17 to connect, thereby disconnecting the second electromagnetic generator 157, thereby releasing the squeezing effect of the friction conveyor belt 151 on the aluminum-plastic packaging bag 7 under the action of the third reset spring, and then releasing the heat-sealed unqualified aluminum-plastic packaging bag 7 to fall below and complete the subsequent processing.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A conveying and sorting platform for heat treatment processing of aluminum-plastic packaging, comprising a suspended conveyor frame (1), wherein two parallel suspended slide rails (5) are fixed at the bottom of the suspended conveyor frame (1), characterized in that, Suspension sliders (6) slide on both suspension slide rails (5). A conveying part is provided on the suspension conveyor frame (1) to push the suspension sliders (6) to move. The bottom of the two suspension sliders (6) is provided with opposite twisted bag parts (15), and an aluminum-plastic packaging bag (7) is held between the two twisted bag parts (15). The twisting bag section (15) includes two friction conveyor belts (151), and a flat heat sealing device (155) for heat sealing the opening of the aluminum-plastic packaging bag (7) is provided between the two friction conveyor belts (151). The friction conveyor belts (151) abut against the aluminum-plastic packaging bag (7), and the friction conveyor belts (151) on both sides of the aluminum-plastic packaging bag (7) are conveyed in the same direction, and the aluminum-plastic packaging bag (7) is twisted. A bag-supporting part (8) is provided above the twisting bag part (15), and the bag-supporting part (8) includes two electric insert rods (86) that are inserted into the opening of the aluminum-plastic packaging bag (7) and opened. An air pump (88) is provided on the bag-supporting part (8) to blow air toward the opening of the aluminum-plastic packaging bag (7).

2. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 1, characterized in that, The conveying unit includes: The conveyor wheel (3) is set in two, and the two conveyor wheels (3) are set at both ends of the bottom of the suspended conveyor body frame (1). A conveyor belt (4) is set between the two conveyor wheels (3), and the conveyor belt (4) is located between the two suspended slide rails (5). Multiple card blocks are fixedly set on the conveyor wheel (3) in a circle. Multiple card slots that are compatible with the card blocks are provided on the side of the conveyor belt (4) that is in contact with the conveyor wheel (3). A drive motor (2) is installed on the suspended conveyor frame (1), and the output end of the drive motor (2) is coaxially fixed with one of the conveyor wheels (3).

3. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 2, characterized in that, A roller frame assembly (12) is provided between the two suspension slide rails (5), and roller assemblies (16) that abut against the side walls of the suspension slide rails (5) are symmetrically provided on both sides of the roller frame assembly (12). A snap-fit ​​block (11) that snaps into the slot on the conveyor belt (4) is fixedly provided at the bottom of the roller frame assembly (12). The roller frame assembly (12) is connected to the suspension slider (6) on the suspension slide rail (5).

4. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 3, characterized in that, The twist bag section (15) also includes: The roller bracket (153) has a double-headed friction wheel (152) at both ends. The double-headed friction wheel (152) includes a drive rod and two pulleys. The two pulleys are symmetrically arranged at both ends of the drive rod and at both ends of the friction conveyor belt (151). The limiting plate (154) is provided in multiple ways and is linearly fixed on the roller bracket (153). The limiting plate (154) abuts against the inner sidewall of the two friction conveyor belts (151) arranged vertically. The flat heat sealing device (155) is installed on the limiting plate (154) and is flush with the outer sidewall of the friction conveyor belt (151).

5. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 4, characterized in that, The bottom of the suspension slider (6) is provided with a bottom frame (9), and the bottom frame (9) is provided with a connecting rod (10) connected to the twist bag part (15), and the bag support part (8) is located between the two connecting rods (10).

6. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 5, characterized in that, A magnet frame (156) is provided on the roller bracket (153), and a second electromagnetic generator (157) is provided at the end of the connecting rod (10). A spring reset assembly (158) is provided between the second electromagnetic generator (157) and the magnet frame (156). The spring reset assembly (158) includes a positioning rod and a third reset spring. One end of the positioning rod is fixed to the second electromagnetic generator (157), and the other end of the positioning rod slides with the magnet frame (156). The third reset spring is coaxially sleeved on the positioning rod and is in a stretched state.

7. A conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 6, characterized in that, The bag support section (8) also includes: A transverse connecting plate (81) is fixed at both ends to a connecting rod (10), and a longitudinal connecting plate (82) is vertically arranged on the transverse connecting plate (81). Sliding holes (84) are provided at both ends of the longitudinal connecting plate (82), and a sliding block assembly (85) slides in the sliding hole (84). An electric insert rod (86) slides vertically up and down on the sliding block assembly (85).

8. The conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 7, characterized in that, A first electromagnetic generator (83) is also provided on the transverse connecting plate (81), and a first reset spring (87) is connected between the first electromagnetic generator (83) and the sliding block assembly (85). A magnet is provided on the sliding block assembly (85), and an air pump (88) is provided at the bottom of the longitudinal connecting plate (82). A visual sensor for detecting the expansion of the aluminum-plastic packaging bag (7) is also provided on the longitudinal connecting plate (82).

9. A conveying and sorting platform for heat treatment processing of aluminum-plastic packaging according to claim 8, characterized in that, The suspension slide rail (5) is equipped with an elastic rod (13) that moves up and down, and the suspension slider (6) is equipped with a push head (14) that abuts against the elastic rod (13). The roller frame assembly (12) is symmetrically provided with transverse abutments (17) on both sides of the suspension slide rail (5), and a second return spring (19) is connected between the two transverse abutments (17). A first contact piece (18) that slides with the roller frame assembly (12) is provided on the transverse abutment (17), and a second contact piece (20) is also provided on the roller frame assembly (12). The second electromagnetic generator (157) is connected to the first contact piece (18) and the second contact piece (20) through a power-off controller.

10. A conveying and sorting method for heat treatment processing of aluminum-plastic packaging, applied to the conveying and sorting platform for heat treatment processing of aluminum-plastic packaging as described in claim 9, characterized in that... The specific method is as follows: S1: Place the aluminum-plastic packaging bag (7) between the two twisted bag parts (15), press down the electric insert rod (86) to insert into the bag opening, the first electromagnetic generator (83) drives the sliding block assembly (85) to slide back and forth to open the bag opening, and at the same time the friction conveyor belt (151) clamps the bag wall so that the opening faces upward and is pre-closed. S2: Open the flat heat sealing device (155) and heat seal the opening of the aluminum-plastic packaging bag (7); S3: Turn on the second electromagnetic generator (157) to bring the friction conveyor belts (151) closer together to squeeze and seal the opening, and drive the motor to drive the friction conveyor belts (151) to rotate in the same direction, causing the sealing opening to twist. S4: Turn on the air pump (88) to blow air towards the seal, and cooperate with the friction conveyor belt (151) to make the seal subject to tearing force, and test the heat seal firmness; S5: If the seal is not secure, airflow will enter and cause the bag to expand. After detection by the visual sensor, the elastic insert (13) will protrude out of the suspension rail (5) through the external magnetic attraction device. S6: The drive motor (2) drives the conveyor belt (4) to run, and the roller frame assembly (12) pushes the suspension slider (6) to make the aluminum-plastic packaging bag (7) suspend and move; S7: The elastic insert (13) touches the push head (14), pushes the transverse push rod (17) to make the first contact piece (18) connect with the second contact piece (20), disconnects the second electromagnetic generator (157), and the twisted bag part (15) is released under the action of the third reset spring, and the unqualified aluminum-plastic packaging bag (7) falls off automatically.

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