Plastic bag of packing box hem and shaping equipment

Abstract

The present application relates to a kind of plastic bag-in-box hemming and shaping equipment, including rack assembly, open mechanism, film-sending-flanging mechanism, spot welding mechanism;Rack assembly includes coaxial upper and lower connection top disc, bottom disc and base disc;Open mechanism includes four bag-supporting vertical rods and bag-supporting vertical rod radial movement driving mechanism;Four bag-supporting vertical rods are evenly distributed in the upper of bottom disc along the circumferential direction, bag-supporting vertical rod radial movement driving mechanism is simultaneously driven connection with four bag-supporting vertical rods, for driving four bag-supporting vertical rods along the radial synchronous outward migration of bottom disc, realize the open of bag-in-box that is set in four bag-supporting vertical rods;Film-sending-flanging mechanism includes four flanging support vertical rods, flanging support vertical rod radial movement driving mechanism, four groups of film-sending-flanging execution mechanism;Spot welding mechanism is made of four groups of spot welding units, four groups of spot welding units are evenly installed on the upper end of top disc along the circumferential direction, and each group of spot welding unit is set on top disc along the radial direction in the form of spot welding head outward.The present application is compact in structure, and high degree of automation.

Description

Technical Field

[0001] This invention belongs to the field of packaging equipment technology, specifically relating to a device for edge rolling and shaping of plastic container bags. Background Technology

[0002] Currently, the FIBC (Flexible Intermediate Bulk Container) packaging industry involves edge-rolling technology, which was previously done manually, which was time-consuming and labor-intensive. As my country's demand for packaging increases, how to improve automation to drive productivity is a question worth considering.

[0003] To address the aforementioned issues, numerous corresponding patents have emerged in the market. However, they all possess certain problems or shortcomings. Current edge-rolling machines offer the following solutions:

[0004] 1. Chinese patent CN103317770B discloses a double-ribbed cylindrical flexible container bag edge rolling device, which solves the edge rolling problem of container bags. However, the device is large in size and requires the assistance of a transport trolley to complete the process, and it does not have a film feeding device.

[0005] 2. Chinese patent CN217023132U discloses a packaging bag folding processing table, which solves the problems of existing packaging bag folding mechanisms in use. However, the reliability of the device is low, and the device needs to be adjusted for different sizes of FIBCs. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compact and highly automated plastic container bag edge rolling and shaping device.

[0007] The above-mentioned objective of this invention is achieved through the following technical solution:

[0008] A plastic container bag edge rolling and shaping device includes a frame assembly, a stretching mechanism, a film feeding-folding mechanism, and a spot welding mechanism;

[0009] The frame assembly includes a top plate, a bottom plate, and a base plate that are coaxially connected vertically; the opening mechanism includes four bag-supporting uprights and a radial movement drive mechanism for the bag-supporting uprights; the four bag-supporting uprights are evenly distributed on the top of the bottom plate in a circumferential direction, and the radial movement drive mechanism for the bag-supporting uprights is simultaneously driven and connected to the four bag-supporting uprights, which is used to drive the four bag-supporting uprights to move outward synchronously in the radial direction of the bottom plate, thereby opening the container bag fitted outside the four bag-supporting uprights;

[0010] The film feeding-folding mechanism includes four folding support rods, a radial movement drive mechanism for the folding support rods, and four sets of film feeding-folding execution mechanisms. The four folding support rods are evenly distributed around the circumference of the chassis and spaced apart from the four bag support rods. The four sets of film feeding-folding execution mechanisms are respectively installed on the upper ends of the four folding support rods. Each set of film feeding-folding execution mechanisms has a folding clamp for clamping the upper edge of the container bag and enabling inward flipping, and a film feeding wheel for conveying the upper edge of the container bag into the folding clamp. The radial movement drive mechanism for the folding support rods is simultaneously connected to the four folding support rods and drives the four folding support rods to move outward synchronously along the radial direction of the chassis, so that the four film feeding wheels form frictional contact with the inner wall of the plastic container.

[0011] The spot welding mechanism consists of four sets of spot welding units, which are evenly distributed and installed on the top plate along the circumferential direction. Each set of spot welding units is radially arranged on the top plate with the spot welding head facing outward. The four sets of spot welding units are perpendicularly aligned with the four support poles of the spreading mechanism.

[0012] Furthermore, the base plate is supported above the ground at a certain height by four support screws evenly distributed in a square along the circumference and is fixedly connected to the chassis; the top plate is fixedly connected to the chassis by a central support screw; two bearing mounting holes are provided on the base plate around the installation positions of the four support screws, and the two bearing mounting holes are set at a 180° angle; eight guide holes are evenly distributed along the circumference on the chassis, and the eight guide holes are all rectangular holes extending radially along the body of the disc. Guide rails are symmetrically arranged on both sides above each guide hole at the upper end of the chassis, and guide ramps are symmetrically arranged on the inner sides of the two guide rails, forming a V-shaped guide groove that is larger at the top and smaller at the bottom between the guide ramps on both sides.

[0013] Furthermore, the radial movement drive mechanism for the bag support poles includes four sets of first sliding components, a first cam disk, and a first drive component. The first cam disk comprises a circular disk body and an extended arm connecting the edge of the disk body. A central hole is provided in the center of the circular disk body, and four cam grooves are evenly distributed around the central hole along the circumferential direction. The four cam grooves rotate in the same direction, and fan-shaped clearance holes are provided between the cam grooves at intervals. The first cam disk is coaxially positioned between the bottom of the chassis and the top of the base plate. The four sets of first sliding components are slidably mounted in four guide holes on the chassis in a vertically limited manner. The four guide holes are spaced apart. The upper ends of the four sets of first sliding components are vertically fixedly connected to the lower ends of the four bag support poles. The lower parts of the four sets of first sliding components pass through the four cam grooves on the first cam disk with clearance fit, forming a sliding fit with the corresponding cam grooves. The first drive component is driven by the extended arm of the first cam disk and is used to drive the first cam disk to rotate, so that the four bag support poles move radially outward under the drive of the four sets of first sliding components.

[0014] Furthermore, the first sliding assembly comprises an upper V-shaped slider and a lower guide post assembly; the V-shaped slider forms a guiding and supporting fit with the V-shaped guide groove at the upper end of the corresponding guide hole, which serves as a lower limit for the first sliding assembly; the guide post assembly comprises a guide post body, a top plate at the upper end of the guide post body, and a post head at the lower end of the guide post. The top plate is fixedly connected to the lower end of the V-shaped slider, the guide post body forms a sliding fit with the corresponding cam groove, and the post head is located below the first cam disk, which serves as an upper limit for the first sliding assembly and provides axial support for the first cam disk.

[0015] Furthermore, the first drive assembly includes a first cylinder support plate, a first drive cylinder, and a first clamping block with a clamping groove. The first drive cylinder is fixedly installed above the first cylinder support plate, and the cylinder rod end of the first drive cylinder is fixedly connected to the end of the first clamping block away from the clamping groove. A first rotating shaft is vertically fixedly installed at the lower center of the first cylinder support plate, and the first rotating shaft is rotatably connected to a bearing mounting hole on the base plate through a bearing. The first clamping block is clamped and engaged with the extended arm on the first cam plate through the clamping groove, and is rotatably connected by a first pin passing through its center. Two limit switch sensors are installed on the base plate to control the two working positions of the first drive cylinder.

[0016] Furthermore, vertical slots are provided at the upper ends of the four folding support uprights, and upper shaft holes with vertical slots are provided on the folding support uprights near the upper end; the film feeding-folding execution mechanism includes a transmission support frame, a dual output shaft motor, a folding transmission mechanism, a film feeding transmission mechanism, a folding upright arm, and the folding clamp.

[0017] The transmission support frame comprises a lower support plate, an upper U-shaped frame, an upper support plate, and an intermediate connecting part. The lower support plate and the upper support plate are respectively fixedly connected to the upper end of the lower ring hoop and the lower end of the upper ring hoop, which are fastened to the support rod. The transmission support frame is fixed to the corresponding support rod near the upper end with the upper U-shaped frame near the central support screw. The lower ring hoop is located below the lower shaft hole of the folding support rod. The dual output shaft motor is fixedly installed on the upper support plate near the bottom edge of the upper U-shaped frame. The two ends of the dual output shaft motor are respectively driven by an electromagnetic clutch to the folding transmission mechanism and the film feeding transmission mechanism. The end output component of the folding transmission mechanism is the upright arm rotating shaft, which is rotatably installed in the upper shaft hole. The end output component of the film feeding transmission mechanism is the film feeding wheel.

[0018] The lower end of the folding arm is fitted into the vertical slot on the upper part of the corresponding folding support rod with a clearance fit, and is driven and connected to the arm shaft of the folding transmission mechanism; the folding clamp is fixedly installed on the upper part of the folding arm.

[0019] The folding clamp consists of a lower clamp seat and an upper inverted flat U-shaped elastic clamping head. The inverted flat U-shaped elastic clamping head is connected to the clamp seat on one side. The lower end of the clamp seat is fixedly connected to the upper end of the folding arm. A film feeding control sensor and an electromagnet are vertically fixed on the side of the inverted flat U-shaped elastic clamping head connected to the clamp seat. A through hole is provided on the other side of the inverted flat U-shaped elastic clamping head, opposite the position of the film feeding control sensor.

[0020] Furthermore, the radial movement drive mechanism for the folded edge support pole consists of four sets of second sliding components, a second cam disk, and a second drive component. The second cam disk comprises a circular disk body and an extended arm connecting the edge of the disk body. A central hole is provided in the center of the circular disk body, and four cam grooves are evenly distributed around the central hole along the circumferential direction, with the four cam grooves rotating in the same direction. The second cam disk is coaxially positioned between the lower part of the first cam disk and the upper part of the base disk.

[0021] The four sets of second sliding components are slidably installed in the other four spaced guide holes on the chassis in a way that limits their position in the vertical direction; the upper ends of the four sets of second sliding components are respectively vertically and fixedly connected to the lower ends of the four folded edge support rods; the lower parts of the four sets of second sliding components pass through the four cam grooves on the second cam disk in a clearance fit, forming a sliding fit with the corresponding cam grooves; the second drive component is driven to the outward arm of the second cam disk, and is used to drive the second cam disk to rotate, so that the four folded edge support rods move radially outward under the drive of the four sets of second sliding components.

[0022] Furthermore, each set of second sliding components specifically comprises an upper V-shaped slider and a lower guide post assembly. The V-shaped slider and the V-shaped guide groove at the upper end of the corresponding guide hole form a guiding and supporting fit, which serves as a lower limit for the second sliding component. The guide post assembly consists of a guide post body, a top plate at the upper end of the guide post body, and a post head at the lower end of the guide post. The top plate is fixedly connected to the lower end of the V-shaped slider, the guide post body slides with the corresponding cam groove, and the post head is located below the second cam disk, which serves as an upper limit for the second sliding component and provides axial support for the second cam disk.

[0023] Furthermore, the second drive assembly includes a second cylinder support plate, a second drive cylinder, and a second clamping block with a clamping groove; the second drive cylinder is fixedly installed above the second cylinder support plate, and the cylinder rod end of the second drive cylinder is fixedly connected to the end of the second clamping block away from the clamping groove; a second rotating shaft is vertically fixedly installed at the lower center of the second cylinder support plate, and the second rotating shaft is rotatably connected to another bearing mounting hole on the base plate through a bearing; the second clamping block is clamped and engaged with the extended arm on the second cam plate through the clamping groove, and is rotatably connected by a second pin inserted in the middle; two limit switch sensors are installed on the base plate to realize the two working position control of the second drive cylinder.

[0024] Furthermore, the spot welding unit includes a pneumatic slide table mounted radially along the top plate, a spot welding equipment connecting plate fixed on the pneumatic slide table slider, and a spot welding device fixed on the connecting plate.

[0025] The advantages and positive effects of this invention are as follows:

[0026] 1. This invention integrates an opening mechanism, a film feeding-folding mechanism, and a spot welding mechanism into a single machine via a frame assembly. The opening mechanism uses four radially movable outward-moving rods to open the plastic container bag. The film feeding-folding mechanism uses four radially movable folding support rods to ensure frictional contact between four film feeding wheels and the inner wall of the plastic container bag. The four film feeding wheels then convey the opened plastic container bag upwards into four folding clamps. The inward rotation of the four folding clamps achieves the folding of the upper part of the plastic container bag. After folding, the spot welding mechanism achieves heat fusion bonding of the folded area, thus completing the folding and shaping of the plastic container bag. This invention cleverly combines various actuators, resulting in a compact and simple structure with a high degree of automation.

[0027] 2. This invention uses two cylinders to drive the first cam plate and the second cam plate respectively, thereby realizing the independent movement of the bag support pole and the folding edge support pole, completing the corresponding actions at the corresponding stages, and making the control more flexible.

[0028] 3. The upper end of the folding support pole of the present invention is provided with a film feeding-folding execution mechanism. In addition to the most basic support function, it can also perform film feeding operation through film feeding control sensor and folding operation through folding clamp, realizing multiple uses of one pole.

[0029] 4. In this invention, both the film feeding and folding actions are driven by a single dual-axis output motor. To make the two actions independent, electromagnetic clutches are installed on both output shafts of the dual-axis output motor. Only when the electromagnetic clutch is energized can the corresponding output shaft complete the output action. The two independent actions are completed by one motor, which reduces costs and facilitates control. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a diagram showing the connection structure between the base plate and the four supporting screws of the present invention;

[0032] Figure 3 This is a perspective view showing the connection of the chassis, first cam disk, second cam disk, first drive assembly, and second drive assembly of the present invention.

[0033] Figure 4 This is a plan view showing the connection of the chassis, first cam disk, second cam disk, first drive assembly, and second drive assembly of the present invention.

[0034] Figure 5 This is a schematic diagram showing the connection of the four support poles, four folded edge support poles, and the chassis of the present invention.

[0035] Figure 6 This is a schematic diagram of the chassis structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the first cam disk of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the second cam disk of the present invention;

[0038] Figure 9 This is a front view of the film feeding and folding mechanism of the present invention in the state where the container bag is not folded;

[0039] Figure 10 This is a right view of the film feeding and folding mechanism of the present invention in the state where the container bag is not bent;

[0040] Figure 11 This is a top view of the film feeding and folding mechanism of the present invention in the state where the container bag is not folded;

[0041] Figure 12 This is a perspective view of the film feeding and folding mechanism of the present invention in the state where the container bag is not bent;

[0042] Figure 13 This is a front view of the film feeding and folding mechanism of the present invention after bending.

[0043] Figure 14 This is a right view of the film feeding-folding mechanism of the present invention after bending into place;

[0044] Figure 15 This is a perspective view of the film feeding and folding mechanism of the present invention after bending.

[0045] Figure 16This is a schematic diagram of the spot welding mechanism of the present invention installed on the top plate. Detailed Implementation

[0046] The structure of the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that these embodiments are descriptive and not limiting.

[0047] Please refer to the equipment for edge rolling and shaping of plastic container bags. Figures 1-16 The invention features a frame assembly 1, a spreading mechanism 2, a film feeding-folding mechanism 3, and a spot welding mechanism 4.

[0048] The frame assembly is used to integrate the spreading mechanism, film feeding-folding mechanism, and spot welding mechanism. The frame assembly includes a base plate 1.1, a bottom plate 1.3, a top plate 1.5, four support screws 1.2 with support feet, and a central support screw 1.4.

[0049] The base plate, bottom plate, and top plate are coaxially arranged from bottom to top, with their diameters decreasing sequentially. Four bolt holes 1.1.1 are provided circumferentially on the base plate. These bolt holes are preferably four-segment arc-shaped elongated holes as shown in the attached diagram, facilitating the insertion of the four support bolts and the installation of other structural components via bolts. Two bearing mounting holes 1.7 are provided on the base plate around the four bolt holes, with the two bearing mounting holes positioned at a 180° angle.

[0050] A certain distance is left between the chassis and the base plate. The chassis consists of a disc body and four radially extending arms 1.3.1 connected to the outer edge of the disc body and extending radially. The four radially extending arms are evenly distributed along the circumference, and each extending arm has a circular hole 1.3.2 for threading a bolt. Eight guide holes 1.3.3 are evenly distributed along the circumference of the disc body of the chassis. All eight guide holes are rectangular holes extending radially along the disc body. Guide rails 1.8 are symmetrically arranged on both sides above each guide hole at the upper end of the chassis. Guide slopes are symmetrically arranged on the inner sides of the two guide rails, and the guide slopes on both sides form a V-shaped guide groove that is larger at the top and smaller at the bottom. A screw mounting hole is provided at the center of the disc body.

[0051] The top plate is a disc with a central hole.

[0052] The four support screws mentioned above contact the bottom surface via support feet. Each of the four support screws passes through a screw mounting hole on the base plate. A locking nut secures the base plate to the four support screws, raising the base a certain height above the bottom surface. The upper parts of the four support screws mate with the round holes on the four radially extending arms of the base plate, and a locking nut secures the four support screws to the base plate. The lower end of the central support screw is fixedly connected to the screw mounting hole on the base plate, which can be achieved through welding, fastening, or threaded connection. The upper end of the central support screw mates with the center hole on the base plate, and a locking nut secures the central support screw to the top plate.

[0053] The aforementioned chassis serves as a guide for the spreading mechanism and the film feeding-folding mechanism through eight guide holes, while the aforementioned top plate is used to install the spot welding mechanism.

[0054] The spreading mechanism is used to spread and deform the flat container bag into a square shape. It mainly includes four supporting uprights 2.4, four sets of first sliding components 2.3, a first cam disk 2.2, and a first drive component. The four sets of first sliding components, the first cam disk, and the first drive component constitute the radial movement drive mechanism for the supporting uprights.

[0055] The first cam disk comprises a circular disk body and an extended arm 2.2.1 connecting the edge of the disk body. A pin hole 2.2.2 is provided on the extended arm. A central hole is provided in the center of the circular disk body. Four cam grooves 2.2.4 are evenly distributed around the central hole along the circumferential direction, with the four cam grooves rotating in the same direction. Fan-shaped clearance holes 2.2.3 are spaced apart between the cam grooves. The first cam disk is coaxially positioned between the bottom of the chassis and the top of the base plate.

[0056] The four sets of first sliding components are slidably installed in four guide holes on the chassis, which are spaced apart, in a manner that limits their position in the vertical direction. The upper ends of the four sets of first sliding components are vertically and fixedly connected to the lower ends of the four support poles, and the lower parts of the four sets of first sliding components pass through the four cam grooves on the first cam plate with clearance fit, forming a sliding fit with the corresponding cam grooves.

[0057] Each first sliding assembly specifically comprises an upper V-shaped slider 2.3.3 and a lower guide post assembly. The V-shaped slider forms a guiding and supporting fit with the V-shaped guide groove at the upper end of the corresponding guide hole, which serves as a lower limit for the first sliding assembly. The guide post assembly consists of a guide post body, a top plate 2.3.1 located at the upper end of the guide post body, and a post head 2.3.2 located at the lower end of the guide post. The top plate is fixedly connected to the lower end of the V-shaped slider by screws. The guide post body forms a sliding fit with the corresponding cam groove. The post head is located below the first cam disk, which serves as an upper limit for the first sliding assembly and provides axial support for the first cam disk.

[0058] The first drive assembly includes a first cylinder support plate 2.7, a first drive cylinder 2.1, and a first clamping block 2.6 with a clamping groove. The first drive cylinder is fixedly mounted above the first cylinder support plate, and the cylinder rod end of the first drive cylinder is fixedly connected to the end of the first clamping block away from the clamping groove. A first rotating shaft is vertically fixedly mounted at the lower center of the first cylinder support plate, and the first rotating shaft is rotatably connected to a bearing mounting hole on the base plate through a bearing. The first clamping block is clamped and engaged with the extended arm on the first cam plate through the clamping groove, and is rotatably connected by a first pin 2.5 passing through its center.

[0059] This opening mechanism can drive the first cam disk to rotate through the action of the first drive cylinder. The first cam disk drives the four sets of first sliding components to move radially in and out synchronously. When moving outward, it can gradually open and deform the inlet and outlet pipes sleeved on the four support bag uprights into a square shape.

[0060] To control the first drive cylinder, two limit switch sensors 1.6 are installed in the arc-shaped elongated hole on the base plate to control the two working positions of the first drive cylinder respectively.

[0061] The film feeding-folding mechanism is used to fold the upper end of the expanded square container bag outwards. It mainly includes four folding support rods 3.4, four sets of second sliding components 3.3, a second cam disk 3.1, a second drive component, and four sets of film feeding-folding actuators 3.5. Among them, the four sets of second sliding components, the second cam disk, and the second drive component constitute the radial movement drive mechanism of the folding support rods.

[0062] The second cam disk comprises a circular disk body and an extended arm 3.1.1 connecting the edge of the disk body. A pin hole 3.1.2 is provided on the extended arm. A central hole is provided in the center of the circular disk body. Four cam grooves 3.1.3 are evenly distributed circumferentially around the central hole, with the four cam grooves rotating in the same direction. The second cam disk is coaxially positioned between the lower part of the first cam disk and the upper part of the base disk. The first cam disk, the second cam disk, and the base disk are coaxially arranged, and a fitting clearance is provided between the base disk and the first cam disk, and between the first cam disk and the second cam disk. One possible implementation is to provide a central shaft at the lower end of the base disk, with the first and second cam disks rotating with the central shaft at the lower end of the base disk through a central inner hole. A spacer sleeve 5 is provided on the central shaft between the first and second cam disks to ensure the fitting clearance between them.

[0063] The four sets of second sliding components are slidably installed in four other spaced guide holes on the chassis, with the latter being limited in the vertical direction. The upper ends of the four sets of second sliding components are vertically and fixedly connected to the lower ends of the four folded support rods, and the lower parts of the four sets of second sliding components pass through the four cam grooves on the second cam disk with clearance fit, forming a sliding fit with the corresponding cam grooves.

[0064] Each second sliding assembly specifically comprises an upper V-shaped slider 3.3.4 and a lower guide post assembly. The V-shaped slider forms a guiding and supporting engagement with the V-shaped guide groove at the upper end of the corresponding guide hole, thus limiting the lower position of the second sliding assembly. The guide post assembly consists of a guide post body 3.3.3, a top plate 3.3.1 located at the upper end of the guide post body, and a post head 3.3.2 located at the lower end of the guide post. The top plate is fixedly connected to the lower end of the V-shaped slider by screws. The guide post body forms a sliding engagement with the corresponding cam groove. The post head is located below the second cam disk, providing upper limit positioning for the second sliding assembly and axial support for the second cam disk.

[0065] The second drive assembly includes a second cylinder support plate 3.8, a second drive cylinder 3.2, and a second clamping block 3.7 with a clamping groove. The second drive cylinder is fixedly mounted above the second cylinder support plate, and the cylinder rod end of the second drive cylinder is fixedly connected to the end of the second clamping block away from the clamping groove. A second rotating shaft 3.8.1 is vertically fixedly mounted at the lower center of the second cylinder support plate, and the second rotating shaft is rotatably connected to another bearing mounting hole on the base plate through a bearing. The second clamping block is clamped and engaged with the extended arm on the second cam plate through the clamping groove, and is rotatably connected by a second pin 3.6 passing through its center.

[0066] To control the second drive cylinder, two limit switch sensors are installed in the arc-shaped elongated hole on the base plate, each controlling one of the two working positions of the second drive cylinder. The installation positions of the two limit switch sensors are adjustable to meet the folding and shaping requirements of FIBCs of different diameters, thus improving the applicability of the equipment.

[0067] The four sets of film feeding-folding actuators are respectively connected to the upper ends of the four folding support columns, specifically:

[0068] Vertical slots are provided at the upper ends of the four folding support uprights. These slots consist of a narrow upper slot section 3.4.1 and a wide lower slot section 3.4.2. An upper shaft hole 3.4.3, perpendicularly communicating with the narrow slot section, is provided near the upper end of each folding support upright. A lower shaft hole is provided below the wide slot section on the folding support upright, and these lower shaft holes are parallel to the upper shaft holes. The film feeding-folding actuator mainly includes a transmission support frame 3.5.4, a dual-output shaft motor 3.5.8, a folding transmission mechanism 3.5.3, a film feeding transmission mechanism 3.5.5, a folding upright arm 3.5.2, and a folding chuck 3.5.1.

[0069] The transmission support frame comprises a lower support plate, an upper U-shaped frame, an upper support plate, and an intermediate connecting part. The lower support plate and the upper support plate are respectively fixed to the upper end of the lower ring clamp 3.5.7 and the lower end of the upper ring clamp 3.5.6, which are fastened to the support rod, by screws. This fixes the transmission support frame to the corresponding support rod near its upper end, with the upper U-shaped frame near the central support screw. The lower ring clamp is located below the lower shaft hole of the folding support rod. The dual-output shaft motor is fixedly mounted on the upper support plate near the bottom edge of the upper U-shaped frame. Both ends of the dual-output shaft motor are connected to the folding transmission mechanism and the film feeding transmission mechanism via electromagnetic clutches.

[0070] The folding transmission mechanism includes a first folding transmission shaft, a second folding transmission shaft, and a vertical arm rotating shaft. The first folding transmission shaft is supported on one side of the upper U-shaped frame, the second folding transmission shaft is supported on one side of the upper U-shaped frame and in a lower shaft hole on one side of the folding support column, and the vertical arm rotating shaft is rotatably supported in an upper shaft hole of the folding support column. The first folding transmission shaft is engaged / disengaged with one output end of a dual-output shaft motor via a first electromagnetic clutch 3.5.10. A first set of pulley transmission mechanisms transmits power from the first folding transmission shaft to the second folding transmission shaft, and a second set of pulley transmission mechanisms transmits power from the second folding transmission shaft to the vertical arm rotating shaft.

[0071] The lower end of the folding arm is fitted into the upper narrow groove of the corresponding folding support rod with a clearance fit and is driven to the arm's rotating shaft. The folding clamp consists of a lower clamp seat and an upper inverted flat U-shaped elastic clamping head. The inverted flat U-shaped elastic clamping head is connected to the clamp seat on one side. A slot and a screw mounting hole perpendicular to the slot are provided at the lower end of the clamp seat. The clamp seat is engaged with the upper end of the folding arm via the slot and fixed by screws inserted into the screw mounting holes. The inverted flat U-shaped elastic clamping head is a clamping head with a certain degree of elasticity. A film feeding control sensor 3.5.8 and an electromagnet 3.5.9 are vertically fixed on the side of the inverted flat U-shaped elastic clamping head connected to the clamp seat. The film feeding control sensor is used to detect whether the upper edge of the container bag has been conveyed to the set position within the inverted flat U-shaped elastic clamping head. To avoid interference with the detection signal of the film feeding control sensor, a through hole 3.5.1a is provided on the other side of the inverted flat U-shaped elastic clamping head, directly opposite the film feeding control sensor. The electromagnet is energized when the film feeding control sensor detects that the upper edge of the FIBC has been successfully inserted into the set position of the inverted flat U-shaped elastic clamping head, causing the two sides of the inverted flat U-shaped elastic clamping head to attract each other, thereby clamping the upper edge of the FIBC. By clamping the upper edge of the FIBC with the inverted flat U-shaped elastic clamping head, and in conjunction with the 180° downward rotation of the folding arm, the edge of the FIBC is rolled up.

[0072] The film feeding transmission mechanism includes a first film feeding drive, a second film feeding drive shaft, and a film feeding wheel 3.5.5a. The first film feeding drive shaft is supported on the other side of the upper U-shaped frame, and the second film feeding drive shaft is supported on the other side of the upper U-shaped frame and in the lower shaft hole on the other side of the folding support rod. The first film feeding drive shaft is engaged and disengaged from the other output end of the dual-output shaft motor via a second electromagnetic clutch 3.5.11. A third set of pulley transmission mechanisms transmits power from the first film feeding drive shaft to the second film feeding drive shaft. The film feeding wheel is driven and connected to the second film feeding drive shaft. The diameter of the film feeding wheel is larger than the outer diameter of the two rings fixed to the support rod. The outer circumference of the film feeding wheel is machined with stripes and mesh patterns to increase friction. By using four film-feeding wheels evenly distributed along the circumference to make frictional contact with the inner surface of the container bag, the container bag is conveyed upwards into the four inverted flat U-shaped elastic clamping heads of the four sets of film-feeding and folding actuators.

[0073] The spot welding mechanism includes four sets of spot welding units, which are evenly distributed and installed on the upper end of the top plate along the circumferential direction. Each spot welding unit includes a pneumatic slide table 4.3 installed radially along the top plate, a spot welding equipment connecting plate 4.2 fixed on the pneumatic slide table slider, and a spot welding device 4.1 fixed on the connecting plate. The spot welding head of the spot welding device is arranged radially outward. The four sets of spot welding units are perpendicularly aligned with the four support poles of the spreading mechanism.

[0074] The working principle of this plastic bulk bag edge rolling and shaping equipment is as follows:

[0075] Before starting work, the height of the base plate can be adjusted using the four support screws according to the site conditions, and the spot welding height can be adjusted using the upper and lower locking nuts of the top plate. At the start of work, the four bag-supporting uprights and the four folding edge support uprights are all in a position close to the center of the base plate, i.e., in the retracted state. The container bag is manually unfolded and placed onto the four bag-supporting uprights and the four folding edge support uprights. At this time, the first drive cylinder is controlled to operate, causing the first cam plate to rotate slightly. Under the combined constraint of the arc-shaped cam groove on the first cam plate and the radial guide hole on the base plate, the first sliding component of the bag-supporting upright moves away from the center of the base plate, tightening the container bag. Simultaneously, the second drive cylinder is controlled to operate, causing the second convex... As the wheel rotates, constrained by the arc-shaped cam groove on the second cam plate and the radial guide hole on the chassis, the folding edge support rod moves away from the center of the chassis under the drive of the second sliding component. The folding edge support rod does not need to tighten the FIBC; the film feeding wheel only needs to properly press the FIBC against it. At this time, the film feeding control sensor with the folding edge clamp detects this. When no edge of the bag is detected, the dual output shaft motor on the corresponding folding edge support rod operates, the second electromagnetic clutch on the output shaft engages, and the film feeding wheel rotates through the film feeding transmission mechanism. Friction propels the FIBC upwards to a position detectable by the film feeding control sensors. When all four sides of the FIBC are at the positions indicated by the four film feeding control sensors, film feeding ends. The electromagnet mounted on the folding clamp is energized and engages, gripping the top edge of the FIBC. Then, the dual-output shaft motors of the four film feeding-folding actuators work together, and all four first electromagnetic clutches are engaged. Through the folding transmission mechanism, the folding arm drives the folding clamp to rotate inwards by 180°, completing the folding action. Finally, the first drive cylinder retracts, causing the four bag-supporting uprights to move inwards back to their original positions. Simultaneously, the second drive cylinder is controlled to tighten the container bag via four folding support rods. Then, four pneumatic slides drive four spot welding devices to move radially outward, completing the welding of the middle of the four folded sides of the container bag. Then, the four pneumatic slides drive the four spot welding devices to retract backward and inward back to their original positions, completing the folding of the container bag. After the electromagnet is de-energized and released, the folded bag or fabric is manually removed. The folding support rods return to their original positions under the drive of the second drive cylinder, and the folding clamps return to their original positions under the action of the dual output shaft motor, and then the folding and shaping of the next piece is carried out.

[0076] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A device for edge-rolling and shaping plastic container bags, characterized in that: Includes frame assembly, spreading mechanism, film feeding-folding mechanism, and spot welding mechanism; The frame assembly includes a top plate, a bottom plate, and a base plate that are coaxially connected vertically; the opening mechanism includes four bag-supporting uprights and a radial movement drive mechanism for the bag-supporting uprights; the four bag-supporting uprights are evenly distributed on the top of the bottom plate in a circumferential direction, and the radial movement drive mechanism for the bag-supporting uprights is simultaneously driven and connected to the four bag-supporting uprights, which is used to drive the four bag-supporting uprights to move outward synchronously in the radial direction of the bottom plate, thereby opening the container bag fitted outside the four bag-supporting uprights; The film feeding-folding mechanism includes four folding support rods, a radial movement drive mechanism for the folding support rods, and four sets of film feeding-folding execution mechanisms. The four folding support rods are evenly distributed around the chassis and spaced apart from the four bag support rods. The four sets of film feeding-folding execution mechanisms are respectively installed on the upper ends of the four folding support rods. Each set of film feeding-folding execution mechanisms has a folding clamp for clamping the upper edge of the container bag and enabling inward flipping, and a film feeding wheel for conveying the upper edge of the container bag into the folding clamp. The radial movement drive mechanism for the folding support rods is simultaneously connected to the four folding support rods and drives the four folding support rods to move outward synchronously along the chassis radially, so that the four film feeding wheels form frictional contact with the inner wall of the container bag. Vertical slots are provided at the upper ends of the four folding support uprights, and upper shaft holes are provided on the folding support uprights near the upper ends, which are perpendicular to the vertical slots. The film feeding-folding actuator includes a transmission support frame, a dual-output shaft motor, a folding transmission mechanism, a film feeding transmission mechanism, a folding upright arm, and the folding chuck. The end output component of the folding transmission mechanism is the upright arm rotating shaft, which is rotatably installed in the upper shaft hole. The end output component of the film feeding transmission mechanism is the film feeding wheel. The lower end of the folding upright arm is inserted into the upper vertical slot of the corresponding folding support upright in a clearance fit manner and is drivenly connected to the upright arm rotating shaft of the folding transmission mechanism. The folding chuck is fixedly installed on the upper part of the folding upright arm. The folding chuck consists of a chuck seat part located at the lower part and an inverted flat U-shaped elastic clamping head part located at the upper part. The spot welding mechanism consists of four sets of spot welding units, which are evenly distributed and installed on the top plate along the circumferential direction. Each set of spot welding units is radially arranged on the top plate with the spot welding head facing outward. The four sets of spot welding units are perpendicularly aligned with the four support poles of the spreading mechanism.

2. The plastic container bag edge-rolling and shaping equipment according to claim 1, characterized in that: The base plate is supported at a certain height above the ground by four support screws evenly distributed along the circumference and is fixedly connected to the chassis. The top plate is fixedly connected to the chassis by a central support screw. Two bearing mounting holes are provided on the base plate around the installation positions of the four support screws, and the two bearing mounting holes are set at a 180° angle. Eight guide holes are evenly distributed along the circumference on the chassis. All eight guide holes are rectangular holes extending radially along the body of the disc. Guide rails are symmetrically arranged on both sides above each guide hole at the upper end of the chassis. Guide slopes are symmetrically arranged on the inner sides of the two guide rails, and the guide slopes on both sides form a V-shaped guide groove that is larger at the top and smaller at the bottom.

3. The plastic container bag edge-rolling and shaping equipment according to claim 2, characterized in that: The radial movement drive mechanism for the bag support poles includes four sets of first sliding components, a first cam disk, and a first drive component. The first cam disk consists of a circular disk body and an extended arm connecting the edge of the circular disk body. A central hole is provided in the center of the circular disk body, and four cam grooves are evenly distributed around the central hole along the circumferential direction. The four cam grooves rotate in the same direction, and fan-shaped clearance holes are provided between the cam grooves at intervals. The first cam disk is coaxially positioned between the bottom of the base plate and the top of the base plate. The four sets of first sliding components are slidably mounted in four guide holes on the base plate in a vertically limited manner. The four guide holes are spaced apart. The upper ends of the four sets of first sliding components are vertically fixedly connected to the lower ends of the four bag support poles. The lower parts of the four sets of first sliding components pass through the four cam grooves on the first cam disk with clearance fit, forming a sliding fit with the corresponding cam grooves. The first drive component is driven by the extended arm of the first cam disk and is used to drive the first cam disk to rotate, so that the four bag support poles move radially outward under the drive of the four sets of first sliding components.

4. The plastic container bag edge-rolling and shaping equipment according to claim 3, characterized in that: The first sliding assembly consists of an upper V-shaped slider and a lower guide post assembly. The V-shaped slider and the V-shaped guide groove at the upper end of the corresponding guide hole form a guiding and supporting fit, which serves as a lower limit for the first sliding assembly. The guide post assembly consists of a guide post body, a top plate at the upper end of the guide post body, and a post head at the lower end of the guide post body. The top plate is fixedly connected to the lower end of the V-shaped slider, the guide post body slides with the corresponding cam groove, and the post head is located below the first cam disk, which serves as an upper limit for the first sliding assembly and provides axial support for the first cam disk.

5. The plastic container bag edge-rolling and shaping equipment according to claim 3, characterized in that: The first drive assembly includes a first cylinder support plate, a first drive cylinder, and a first clamping block with a clamping groove. The first drive cylinder is fixedly installed above the first cylinder support plate, and the cylinder rod end of the first drive cylinder is fixedly connected to the end of the first clamping block away from the clamping groove. A first rotating shaft is vertically fixedly installed at the lower center of the first cylinder support plate, and the first rotating shaft is rotatably connected to a bearing mounting hole on the base plate through a bearing. The first clamping block is clamped and engaged with the extension arm on the first cam plate through the clamping groove, and is rotatably connected by a first pin passing through the middle. Two limit switch sensors are installed on the base plate to realize the two working position control of the first drive cylinder.

6. The plastic container bag edge-rolling and shaping equipment according to claim 2, characterized in that: The transmission support frame consists of a lower support plate, an upper U-shaped frame, an upper support plate, and an intermediate connecting part. The lower support plate and the upper support plate are respectively fixedly connected to the upper end of the lower ring hoop and the lower end of the upper ring hoop, which are fastened to the folding support rod. The transmission support frame is fixed to the upper end of the corresponding folding support rod near the upper end by means of the upper U-shaped frame near the central support screw, and the lower ring hoop is located below the lower shaft hole of the folding support rod. The dual output shaft motor is fixedly installed on the upper support plate near the bottom edge of the upper U-shaped frame. The two ends of the dual output shaft motor are respectively driven and connected to the folding transmission mechanism and the film feeding transmission mechanism through an electromagnetic clutch. The inverted flat U-shaped elastic clamping head is connected to the clamping head seat on one side; the lower end of the clamping head seat is fixedly connected to the upper end of the folding arm; a film feeding control sensor and an electromagnet are vertically fixedly installed on the side of the inverted flat U-shaped elastic clamping head connected to the clamping head seat, and a through hole is provided on the other side of the inverted flat U-shaped elastic clamping head opposite the position of the film feeding control sensor.

7. The plastic container bag edge-rolling and shaping equipment according to claim 6, characterized in that: The radial movement drive mechanism for the folded edge support pole includes four sets of second sliding components, a second cam disk, and a second drive component. The second cam disk consists of a circular disk body and an extended arm connecting the edge of the circular disk body. A central hole is provided in the center of the circular disk body, and four cam grooves are evenly distributed around the central hole along the circumferential direction. The four cam grooves rotate in the same direction. The second cam disk is coaxially positioned between the lower part of the first cam disk and the upper part of the base disk. The four sets of second sliding components are slidably installed in four other spaced guide holes on the chassis, respectively, with the upper ends of the four sets of second sliding components being vertically and fixedly connected to the lower ends of the four folded edge support rods. The lower parts of the four sets of second sliding components pass through the four cam grooves on the second cam disk with clearance fit, forming a sliding fit with the corresponding cam grooves. The second drive component is driven by the outward extension arm of the second cam disk and is used to drive the second cam disk to rotate, so that the four folded edge support rods move radially outward under the drive of the four sets of second sliding components.

8. The plastic container bag edge-rolling and shaping equipment according to claim 6, characterized in that: Each second sliding assembly consists of an upper V-shaped slider and a lower guide post assembly. The V-shaped slider and the V-shaped guide groove at the upper end of the corresponding guide hole form a guiding and supporting fit, which serves as a lower limit for the second sliding assembly. The guide post assembly consists of a guide post body, a top plate at the upper end of the guide post body, and a post head at the lower end of the guide post body. The top plate is fixedly connected to the lower end of the V-shaped slider. The guide post body and the corresponding cam groove form a sliding fit. The post head is located below the second cam disk, which serves as an upper limit for the second sliding assembly and provides axial support for the second cam disk.

9. The plastic container bag edge-rolling and shaping equipment according to claim 7, characterized in that: The second drive assembly includes a second cylinder support plate, a second drive cylinder, and a second clamping block with a clamping groove. The second drive cylinder is fixedly installed above the second cylinder support plate, and the cylinder rod end of the second drive cylinder is fixedly connected to the end of the second clamping block away from the clamping groove. A second rotating shaft is vertically fixedly installed at the lower center of the second cylinder support plate, and the second rotating shaft is rotatably connected to another bearing mounting hole on the base plate through a bearing. The second clamping block is clamped and engaged with the extended arm on the second cam plate through the clamping groove, and is rotatably connected by a second pin inserted in the middle. Two limit switch sensors are installed on the base plate to realize the two working position control of the second drive cylinder.

10. The plastic container bag edge-rolling and shaping equipment according to claim 6, characterized in that: The spot welding unit includes a pneumatic slide table installed radially along the top plate, a spot welding equipment connecting plate fixed on the pneumatic slide table slider, and spot welding equipment fixed on the connecting plate.

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