Paper box forming device and servo filling device of granary type roof packaging box filling machine

Abstract

The invention discloses a paper box forming device and a servo filling device of a granary type roof packaging box filling machine. Comprising a paper box plate warehouse, a paper box picking mechanism, a paper box pushing mechanism, a mandrel mechanism, a bottom heating mechanism, a paper box positioning mechanism, a bottom pleating mechanism, a bottom transition mechanism, a bottom sealing mechanism, a paper box unloading mechanism, a paper box conveying mechanism, a cover welding mechanism, a vacuum dust removal mechanism, a primary top pleating mechanism, a primary filling mechanism and a secondary filling mechanism. A primary top heating mechanism, a secondary top heating mechanism, a secondary top pleating mechanism, a primary top sealing mechanism, a secondary top sealing mechanism and a product discharging mechanism; the servo filling device comprises a filling mechanism, a filling driving mechanism and a filling pressing mechanism; and the filling speed can be increased, the production efficiency is improved, equipment operation is stable, and practicability is high.

Description

Technical Field

[0001] This invention relates to the field of food and beverage packaging machinery technology, specifically to a paper box forming device and a servo filling device for a barn-type roof box filling machine. Background Technology

[0002] Currently, the market primarily uses vertical, standard gable-top boxes (freshhouses) to fill liquid products (milk, beverages, soy milk, or juice). Due to gravity and the low friction between fingers and the box, the product easily slips from the fingers, making it inconvenient to use. Barn-style gable-top boxes, due to their superior convenience, environmental friendliness, display appeal, and sealing properties, are widely used for packaging liquid foods. Their packaging equipment mainly includes three core workstations: box forming, filling, and sealing.

[0003] Current filling machines all use cam-driven filling mechanisms. These machines suffer from complex transmission structures, large size, and numerous grease filling points, resulting in low transmission accuracy and poor synchronization. Furthermore, they require large amounts of lubricating grease, leading to low hygiene standards. In addition, to diversify product lines and expand sales markets, manufacturers often need to fill products of varying viscosities and temperatures. Due to the poor adaptability of existing filling mechanisms, different parts need to be replaced, increasing production costs and reducing practicality. Moreover, existing filling mechanisms suffer from poor filling volume control accuracy, high failure rates, high maintenance costs, and significant wear and tear. They also exhibit slow filling speeds and low production efficiency, severely impacting the stability of product filling quality. Summary of the Invention

[0004] Terminology Explanation: Barn-style roof box: It looks like a grain silo for storing rice, with a large cross-section at the top and a small cross-section at the bottom. The top looks like the roof of a house. It is a packaging box for storing liquids (beverages, milk, soy milk or juice).

[0005] Paper box forming in filling machine: The paper box has two parts: bottom forming and top forming. First, the bottom of the paper box is heated, pleated, and then sealed to form a trapezoidal shape. Then, the top of the paper box is pleated, heated, and then sealed to form a barn-shaped gable box.

[0006] Servo filling device: A device that uses a servo motor to drive the pressing rod to lift the carton, and the servo motor drives the piston in the piston cylinder to move up and down, filling the liquid (beverage, milk, soy milk or juice) in the piston cylinder from the filling nozzle into the barn-type gable box.

[0007] The purpose of this invention is to provide a convenient, handheld, integrated cardboard box forming and filling machine for barn-type rooftop boxes. The specific solution of this invention is as follows: a cardboard box forming device and servo filling device for a barn-type rooftop box filling machine, comprising a cardboard box magazine (1), a cardboard box picking mechanism (2), a cardboard box pushing mechanism (3), a mandrel mechanism (4), a bottom heating mechanism (5), a cardboard box positioning mechanism (6), a bottom pleating mechanism (7), a bottom transition mechanism (8), a bottom sealing mechanism (9), a cardboard box unloading mechanism (10), a cardboard box conveying mechanism (11), a lid welding mechanism (12), a vacuum dust removal mechanism (13), a primary top pleating mechanism (14), a primary filling mechanism (15), a secondary filling mechanism (16), a primary top heating mechanism (17), a secondary top heating mechanism (18), a secondary top pleating mechanism (19), a primary top sealing mechanism (20), a secondary top sealing mechanism (21), and a product discharge mechanism (22). The paper box picking mechanism (2) takes out a paper box from the paper box plate library (1) and unfolds it into a quadrilateral; the paper box pushing mechanism (3) pushes the unfolded quadrilateral paper box into the spindle mechanism (4). The core shaft mechanism (4) moves the paper box sequentially to the bottom heating mechanism (5), the bottom pleating mechanism (7), the bottom sealing mechanism (9), and the paper box unloading mechanism (10); the paper box unloading mechanism (10) unloads the paper box with the bottom already sealed to the paper box conveying mechanism (11). The carton conveying mechanism (11) sequentially conveys the carton to the lid welding mechanism (12), the vacuum dust removal mechanism (13), the primary top pleating mechanism (14), the primary filling mechanism (15), the secondary filling mechanism (16), the primary top heating mechanism (17), the secondary top heating mechanism (18), the secondary top pleating mechanism (19), the primary top sealing mechanism (20), the secondary top sealing mechanism (21), and finally to the product discharge mechanism (22).

[0008] Furthermore, approximately 400 cardboard sheets are placed in the cardboard sheet library (1); the cardboard box picking mechanism (2) uses a set of vacuum suction cups to remove the cardboard sheets from the cardboard sheet library (1) and unfold them into a quadrilateral shape; the cardboard box pushing mechanism (3) pushes the unfolded quadrilateral cardboard box along the guide rail at the corner of the cardboard box into the spindle mechanism (4), where the top of the cardboard box is clamped by a spring plate on the spindle.

[0009] Furthermore, the bottom heating mechanism (5) uses hot air to heat and soften the polyethylene coated on the bottom surface of the cardboard box.

[0010] Furthermore, the bottom pleating mechanism (7) folds the bottom of the paper box differentially through two pairs of pleating devices. At the same time, the J-shaped bottom pleating device folds the J-shaped bottom of the paper box. To prevent the paper box from shifting upward when the bottom of the paper box is pleated, the paper box positioning mechanism (6) positions the paper box before the bottom is pleated and releases the paper box after the pleating is completed.

[0011] Furthermore, after pleating, the bottom of the cardboard box transitions along the guide rail of the bottom transition mechanism (8) to the bottom sealing mechanism (9); the bottom sealing mechanism (9) performs pressure sealing on the bottom of the cardboard box, and at the same time, the softened polyethylene is cooled by ice water to make the bottom of the cardboard box firmly bonded, so that liquid will not leak from the gaps in the bonded cardboard box; the cardboard box unloading mechanism (10) unloads the cardboard box with the bottom already sealed from the core shaft to the cardboard box conveying mechanism (11).

[0012] Furthermore, the lid welding mechanism (12) loads the lid onto the anvil on the slide. After the anvil rotates 180°, the lid is aligned with the hole of the lifted cardboard lid. The anvil and welding head are pushed together and squeezed. The lid flange and the PE film on the inner surface of the cardboard box are welded and sealed by ultrasonic welding.

[0013] Furthermore, the vacuum dust removal mechanism (13) can extend the exhaust pipe into the bottom of the cardboard box, while clean air is blown towards the bottom of the cardboard box. The paper scraps, plastic scraps and other impurities at the bottom of the cardboard box are blown up. The exhaust pipe absorbs and discharges the impurities while lifting them to the outside of the top of the cardboard box.

[0014] Furthermore, the first-stage top pleating mechanism (14) extends the cardboard box baffle into the top crease inside the cardboard box and pre-pleats the top of the cardboard box using a pair of triangular blades.

[0015] Furthermore, the primary filling mechanism (15) fills the paper box with liquid from the primary filling nozzle as the paper box descends after it is raised to a certain height; the secondary filling mechanism (16) fills the remaining liquid into the paper box from the secondary filling nozzle.

[0016] Furthermore, the primary top heating mechanism (17) uses hot air to heat and soften the polyethylene coated on the top surface of the cardboard box; the secondary top heating mechanism (18) heats and softens the polyethylene coated on the top surface of the cardboard box again.

[0017] Furthermore, the secondary top pleating mechanism (19) pleats the top of the pre-pleated cardboard box again using two pairs of pleating devices.

[0018] Furthermore, the primary top sealing mechanism (20) applies pressure to seal the top of the cardboard box, while simultaneously cooling the softened polyethylene with ice water to ensure a firm bond at the top of the cardboard box, preventing liquid leakage from the gaps in the bonded box; the secondary top sealing mechanism (21) applies pressure and cools the top of the cardboard box again after the primary top sealing.

[0019] Furthermore, the product discharge mechanism (22) uses a vacuum suction cup to remove the carton from the conveyor frame, move it onto the product conveyor belt, and discharge it from the filling machine.

[0020] Preferably, the device further includes a servo filling device, comprising a filling mechanism, a filling drive mechanism, and a filling press mechanism.

[0021] Furthermore, the filling mechanism includes a feed valve (31), a valve (32) for the CIP spray ball, a liquid buffer tank (33), a liquid level sensor (34), a pipe (35) for the CIP spray ball, a breathing pipe (36), a liquid pipe (37), a piston cylinder (38), and a filling nozzle (39).

[0022] Further, the filling nozzle includes a filling nozzle cylinder (51), a filling nozzle connecting rod (52), a filling nozzle diaphragm (53), a filling nozzle spring pressure plate (54), a filling nozzle spring (55), a filling nozzle valve seat (56), a filling nozzle check valve (57), a filling nozzle cavity (58), a mesh (59), and a filling nozzle valve seat cavity (60). Further, the filling drive mechanism includes a piston cylinder cylinder (71), a piston cylinder connecting rod (72), a piston cylinder diaphragm (73), a piston cylinder spring pressure plate (74), a piston cylinder spring (75), a piston cylinder valve seat (76), a piston cylinder check valve (77), a piston cylinder cavity (78), a piston (79), a piston cylinder (80), a piston pressing rod (81), a piston pressing rod guide sleeve (82), a piston pressing rod universal joint (83), and a universal joint connecting plate (84). Piston pressing shaft connecting plate (85), piston pressing shaft (86), piston pressing shaft linear bearing (87), lead screw nut (88), lead screw (89), piston pressing shaft detection proximity switch (90), drive lead screw synchronous pulley (91), drive lead screw synchronous pulley tensioning sleeve (92), filling synchronous belt (93), servo motor drive synchronous pulley tensioning sleeve (94), servo motor drive synchronous pulley (95), filling servo motor (96), piston cylinder valve seat cavity (97).

[0023] Furthermore, the filling and pressing mechanism includes a filling and pressing rod (42), a filling and pressing carton pressure plate (101), a filling and pressing carton pressing rod (102), a guide sleeve for the carton pressing rod (103), a filling and pressing synchronous belt (104), a servo motor driven synchronous pulley (105), a servo motor driven synchronous pulley tensioning sleeve (106), a filling and pressing servo motor (107), a proximity switch for detecting the filling and pressing rod (108), a guide sleeve for the filling and pressing rod (109), a filling and pressing bracket (110), and a filling and pressing push plate (111).

[0024] This invention has the following advantages: The packaging box features a large top cross-section, a small bottom cross-section, and a top resembling a barn roof, offering convenience, environmental friendliness, display appeal, and airtightness. The cardboard box forming device of this invention is rationally designed, compact in structure, and boasts high transmission precision, ensuring the synchronization of the actions of each mechanism. Furthermore, the equipment has a reasonable layout and occupies little space. The servo filling mechanism of this invention provides precise filling volume control, a smooth and rapid filling process, adjustable and controllable filling speed, a high degree of automation, and is less prone to cardboard box scratches or damage, leaving no friction marks, resulting in good product appearance quality, low operating noise, and a high product hygiene level. It also facilitates increased filling speed, improves production efficiency, has a low equipment failure rate, operates stably, and is highly practical. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a barn-type rooftop packaging box filling machine according to the present invention; Figure 2 This is a front view of a barn-type rooftop packaging box filling machine according to the present invention; Figure 3 This is a top view of the carton forming device of the barn-type rooftop packaging box filling machine according to the present invention; Figure 4 This is a schematic diagram of the servo filling device structure of a barn-type rooftop packaging box filling machine according to the present invention; Figure 5 This is a schematic diagram of the filling nozzle structure of the servo filling device described in this invention; Figure 6 This is a schematic diagram of the filling drive mechanism of the servo filling device described in this invention; Figure 7 This is a schematic diagram of the filling and pressing mechanism of the servo filling device described in this invention; Figure 8 This is a schematic diagram of the barn-type roof packaging box before it is formed, as described in this invention. Figure 9 This is the state of the barn-type roof packaging box as described in this invention after it has been formed and sealed.

[0026] Reference numerals: 1-Carton tray, 2-Carton picking mechanism, 3-Carton pushing mechanism, 4-Mandrel mechanism, 5-Bottom heating mechanism, 6-Carton positioning mechanism, 7-Bottom pleating mechanism, 8-Bottom transition mechanism, 9-Bottom sealing mechanism, 10-Carton unloading mechanism, 11-Carton conveying mechanism, 12-Lid welding mechanism, 13-Vacuum dust removal mechanism, 14-Primary top pleating mechanism, 15-Primary filling mechanism, 16-Secondary filling mechanism, 17-Primary top heating mechanism, 18-Secondary top heating mechanism, 19-Secondary top pleating mechanism, 20-Primary top sealing mechanism, 21-Secondary top sealing mechanism, 22-Product discharge mechanism. 31-Feed valve, 32-CIP spray ball valve, 33-Liquid buffer tank, 34-Level sensor, 35-CIP spray ball piping, 36-Breathing pipe, 37-Liquid piping, 38-Piston cylinder, 39-Filling nozzle, 40-Barn roof box, 41-Carton conveyor, 42-Filling press rod, 51-Cylinder for filling nozzle; 52-Connecting rod for filling nozzle; 53-Diaphragm for filling nozzle; 54-Spring pressure plate for filling nozzle; 55-Spring for filling nozzle; 56-Valve seat for filling nozzle; 57-Check valve for filling nozzle; 58-Cavity for filling nozzle; 59-Wire mesh; 60-Valve seat cavity for filling nozzle. 71-Cylinder for piston cylinder; 72-Connecting rod for piston cylinder; 73-Diaphragm for piston cylinder; 74-Spring pressure plate for piston cylinder; 75-Spring for piston cylinder; 76-Valve seat for piston cylinder; 77-Check valve for piston cylinder; 78-Cavity for piston cylinder; 79-Piston; 80-Piston cylinder; 81-Piston pressing rod; 82-Guide sleeve for piston pressing rod; 83-Universal joint for connecting piston pressing rod; 84-Connecting plate for universal joint; 85-Piston pressing rod Shaft connecting plate, 86-piston press shaft, 87-linear bearing for piston press shaft, 88-nut for lead screw, 89-lead screw, 90-proximity switch for piston press shaft detection, 91-synchronous belt pulley for drive lead screw, 92-tensioning sleeve for synchronous belt pulley for drive lead screw, 93-synchronous belt for filling, 94-tensioning sleeve for synchronous belt pulley for servo motor drive, 95-synchronous belt pulley for servo motor drive, 96-servo motor for filling, 97-valve seat cavity for piston cylinder. 101-Paper box pressure plate for filling and pressing, 102-Paper box pressing rod for filling and pressing, 103-Guide sleeve for paper box pressing rod, 104-Synchronous belt for filling and pressing, 105-Synchronous belt pulley driven by servo motor, 106-Tensioning sleeve for synchronous belt pulley driven by servo motor, 107-Servo motor for filling and pressing, 108-Proximity switch for detecting filling pressing rod, 109-Guide sleeve for filling and pressing rod, 110-Bearing bracket for filling and pressing, 111-Push plate for filling and pressing. Detailed Implementation

[0027] To make the technical problems solved, the technical solutions, and the beneficial effects of the present invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0028] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] like Figure 1 , 3 As shown, the present invention provides a paper box forming device and servo filling device for a barn-type rooftop packaging box filling machine, which includes a paper box tray 1; a paper box picking mechanism 2; a paper box pushing mechanism 3; a mandrel mechanism 4; a bottom heating mechanism 5; a paper box positioning mechanism 6; a bottom pleating mechanism 7; a bottom transition mechanism 8; a bottom sealing mechanism 9; a paper box unloading mechanism 10; a paper box conveying mechanism 11; a lid welding mechanism 12; a vacuum dust removal mechanism 13; a primary top pleating mechanism 14; a primary filling mechanism 15; a secondary filling mechanism 16; a primary top heating mechanism 17; a secondary top heating mechanism 18; a secondary top pleating mechanism 19; a primary top sealing mechanism 20; a secondary top sealing mechanism 21; and a product discharge mechanism 22.

[0030] like Figure 3 As shown, the cardboard tray 1 can hold approximately 400 cardboard trays. When the rocker arm of the cardboard tray picking mechanism 2 advances, a set of vacuum suction cups on the rocker arm contacts the cardboard tray, creating a vacuum that holds the first cardboard tray. The rocker arm of the cardboard tray picking mechanism 2 then retracts to its initial state, at which point the first cardboard tray is removed from the cardboard tray 1. This process repeats, with cardboard trays being removed one by one from the cardboard tray 1. Subsequent cardboard trays are then slowly pushed forward by the pressure plate. When the proximity switch under the cardboard tray detects that the number of cardboard trays has decreased to a certain level, the filling machine will issue a cardboard tray shortage alarm signal to remind the operator to replenish the cardboard trays in a timely manner.

[0031] The cardboard box picking mechanism 2 retrieves a cardboard box from the cardboard box tray 1, and at the same time, the cardboard box is unfolded into a quadrilateral and enters the track. After a set of through-beam photoelectric switches detects a normal cardboard box in the track, the push plate of the cardboard box pushing mechanism 3 supports the bottom of the cardboard box on the first and third sides. From bottom to top, the unfolded quadrilateral cardboard box is pushed into the mandrel along the guide rail at the corner of the cardboard box. When the cardboard box reaches a certain position, a pair of spring plates on each mandrel clamp the cardboard box to prevent the barn-type roof box from falling.

[0032] At the spindle inlet, a set of through-beam photoelectric switches detects a normal paper box. The spindle then rotates while moving the paper box to the bottom heating, bottom pleating, bottom sealing, and paper box unloading stations.

[0033] The cardboard box moves to position 5 of the bottom heating mechanism, and the bottom heating nozzle is raised into the bottom of the cardboard box. Hot air is used to heat and soften the polyethylene coated on the bottom surface of the cardboard box.

[0034] The cardboard box moves to the cardboard box positioning mechanism 6 to prevent the cardboard box from shifting upwards when the bottom of the cardboard box is pleated. Before the bottom is pleated, the pressure plate positions the cardboard box. After the pleating is completed, the pressure plate is released.

[0035] The cardboard box moves to the bottom pleating mechanism 7, where the bottom of the cardboard box is folded differentially by two pairs of pleating devices, one in front and one in the back, and one in the left and right, so that the bottom of the third side of the cardboard box is inserted into the bottom of the first side of the cardboard box. At the same time, the J-shaped bottom pleating device folds the J-shaped bottom of the cardboard box.

[0036] The cardboard box moves to the bottom transition mechanism 8, and after passing the bottom pleats, it transitions along the transition guide to the bottom sealing mechanism 9.

[0037] The cardboard box moves to the bottom sealing mechanism 9, the bottom sealing plate is raised, and the bottom of the cardboard box fitted on the mandrel is pressure sealed. At the same time, the sealing plate, which is circulated with ice water, cools the softened polyethylene at the bottom of the cardboard box, so that the bottom of the cardboard box is firmly bonded and liquid will not leak from the gaps in the bonded cardboard box.

[0038] The cardboard box moves to the bottom unloading mechanism, where a pair of vacuum suction cups are raised to the bottom of the cardboard box that is fitted onto the mandrel. The vacuum suction cups create a vacuum, holding the bottom of the cardboard box in place, and unloading the cardboard box, which has already been sealed at the bottom, onto the cardboard box conveyor.

[0039] After a set of through-beam photoelectric switches detects a normal cardboard box between the cardboard box conveyor and the mandrel, the cardboard box conveyor mechanism 11 transports the cardboard box removed from the mandrel to the lid welding mechanism 12, vacuum dust removal mechanism 13, primary top pleating mechanism 14, primary filling mechanism 15, secondary filling mechanism 16, primary top heating mechanism 17, secondary top heating mechanism 18, secondary top pleating mechanism 19, primary top sealing mechanism 20, secondary top sealing mechanism 21, and finally to the product discharge mechanism 22.

[0040] The cardboard box is conveyed to the lid welding mechanism 12. The lid is loaded onto the anvil on the slide. After the anvil rotates 180°, the lid is aligned with the hole of the lifted cardboard box lid. The anvil and welding head are pushed together and squeezed. The lid flange and the PE film on the inner surface of the cardboard box are welded and sealed by ultrasonic welding.

[0041] The cardboard box is conveyed to the vacuum dust removal mechanism 13. The exhaust pipe extends into the bottom of the cardboard box, and clean air is blown towards the bottom of the cardboard box. Small particles such as paper scraps and plastic scraps at the bottom of the cardboard box are blown up. The exhaust pipe absorbs and discharges the small particles while lifting them to the outside of the top of the cardboard box.

[0042] The cardboard box is fed to the top pleating mechanism 14, where the cardboard box baffle extends into the top crease inside the cardboard box and pre-pleats the top of the cardboard box using a pair of triangular blades.

[0043] The cardboard box is conveyed to the primary filling mechanism 15. After the cardboard box is raised to a certain height, liquid is poured into the cardboard box from the primary filling nozzle as the cardboard box descends.

[0044] The cardboard box is conveyed to the secondary filling mechanism 16, where the remaining liquid is poured into the cardboard box through the secondary filling nozzle.

[0045] The cardboard box is conveyed to the primary top heating mechanism 17, where the primary top heating nozzle extends into the top of the cardboard box and uses hot air to heat and soften the polyethylene coated on the bottom surface of the cardboard box.

[0046] The cardboard box is conveyed to the secondary top heating mechanism 18, where the secondary top heating nozzle also extends into the top of the cardboard box, using hot air to heat and soften the polyethylene coated on the bottom surface of the cardboard box again.

[0047] The cardboard box is conveyed to the secondary top pleating mechanism 19, where the top of the pre-pleated cardboard box is pleated again by two pairs of pleating devices.

[0048] The cardboard box is conveyed to the primary top sealing mechanism 20. Utilizing the lever principle, a pair of top sealing blocks apply pressure to seal the top of the cardboard box. At the same time, the sealing blocks, which are circulated with ice water, cool the softened polyethylene on the top of the cardboard box, ensuring that the top of the cardboard box is firmly bonded and preventing liquid from leaking from the gaps in the bonded area.

[0049] The cardboard box is conveyed to the secondary top sealing mechanism 21, where the top of the cardboard box, which has undergone the first top sealing, is pressurized and cooled again.

[0050] The product discharge mechanism uses a set of vacuum suction cups to remove the cardboard box from the conveyor frame, move it onto the product conveyor belt, and discharge it from the filling machine.

[0051] like Figure 4-7 As shown, this device also includes a servo filling device, which includes a filling mechanism, a filling drive mechanism, and a filling press mechanism.

[0052] like Figure 4 As shown, when the level sensor 34 detects that the liquid level in the liquid buffer tank 32 is at the low or lower limit position, the feed valve 31 opens, and liquid enters the liquid buffer tank 32 from the feed valve 31. When the level sensor 34 detects that the liquid level in the liquid buffer tank 32 is at the upper limit position, the feed valve 31 closes.

[0053] like Figure 6 As shown, a set of through-beam photoelectric switches detects normal cardboard boxes between the cardboard box conveyor and the mandrel. Before the cardboard box is conveyed to the filling stage, the filling servo motor 96 starts to rotate clockwise after receiving a PLC command. The filling synchronous belt 93 rotates, driving the lead screw 89 to rotate. The lead screw nut 88 on the lead screw 89 drives the piston pressing shaft 86 to descend. The piston pressing shaft 86 drives the piston pressing rod 81 to descend. The piston pressing rod 81 drives the piston 79 to descend inside the piston cylinder 80. A negative pressure is formed on the piston cylinder cavity 78 and the piston cylinder 80. A pressure difference is formed between the pressure in the piston cylinder valve seat cavity 97 and the pressure in the piston cylinder cavity 78. When the pressure difference is greater than the spring force, the piston cylinder one-way valve 77 opens, and the liquid in the piston cylinder valve seat cavity 97 flows into the piston cylinder cavity 78. After receiving a PLC command, the filling servo motor 96 stops. At this time, the piston 79 also stops, and a certain volume of liquid has entered the piston cylinder 80.

[0054] like Figure 7 As shown, a set of through-beam photoelectric switches detects normal cartons between the carton conveyor and the mandrel. The carton is conveyed to the first filling position. After receiving the PLC command, the filling press servo motor 107 starts to rotate clockwise. The filling press synchronous belt 104 rotates to drive the filling press bracket 110 to lift. The filling press bracket 110 simultaneously drives the filling press rod 42 and the filling press carton pressing rod 102 to lift. The filling press push plate 111 supports the bottom of the barn roof box 40. At the same time, the filling press carton pressing plate 101 presses the top of the barn roof box 40 to lift the carton to a certain height. The bottom of the barn roof box 40 does not protrude from the carton conveyor 41, allowing the filling nozzle 39 to extend into the barn roof box 40 to prevent carton jamming and liquid splashing.

[0055] Before the barn-type roof box 40 is raised to a certain height, the filling servo motor 96 starts to rotate counterclockwise after receiving the PLC command. The filling synchronous belt 93 rotates, driving the lead screw 89 to rotate. The lead screw nut 8 on the lead screw 89 drives the piston pressing shaft 86 to rise. The piston pressing shaft 86 drives the piston pressing rod 81 to rise. The piston pressing rod 81 drives the piston 79 to rise in the piston cylinder 80. When positive pressure is just formed on the piston cylinder cavity 78 and the piston cylinder 80, the piston cylinder spring 75 closes the piston cylinder check valve 77 under the elastic force.

[0056] When the piston cylinder is closed by the one-way valve 77, the pressure on the piston cylinder cavity 78 and piston cylinder 80 increases and exceeds the spring force 55 of the filling nozzle. Then the one-way valve 57 of the filling nozzle is opened, and the liquid flows into the filling nozzle cavity 58 and is slowly poured into the barn roof box 40 through the mesh 59.

[0057] When the liquid is first poured into the barn-type roof box 40, the filling press servo motor 107, upon receiving a PLC command, starts to rotate counterclockwise. The filling press synchronous belt 104 rotates, driving the filling press support 110 to descend. The filling press support 110 simultaneously drives the filling press rod 42 and the filling press cardboard box 102 pressing rod to descend. The barn-type cardboard box 40 descends, gradually increasing and then decreasing, while the liquid flow rate also gradually increases and then decreases. When the barn-type cardboard box 40 is almost at the bottom, the liquid flow rate also reaches its minimum. Finally, the liquid in the filling nozzle cavity 58 is blocked by the mesh 59 and remains inside the filling nozzle cavity 58.

[0058] 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 cardboard box forming device and a servo filling device for a barn-type rooftop packaging box filling machine, characterized in that, It includes a cardboard tray storage, a cardboard tray picking mechanism, a cardboard tray pushing mechanism, a mandrel mechanism, a bottom heating mechanism, a cardboard tray positioning mechanism, a bottom pleating mechanism, a bottom transition mechanism, a bottom sealing mechanism, a cardboard tray unloading mechanism, a cardboard tray conveying mechanism, a lid welding mechanism, a vacuum dust removal mechanism, a primary top pleating mechanism, a primary filling mechanism, a secondary filling mechanism, a primary top heating mechanism, a secondary top heating mechanism, a secondary top pleating mechanism, a primary top sealing mechanism, a secondary top sealing mechanism, and a product discharge mechanism; The paper box picking mechanism takes out a paper box from the paper box tray and unfolds it into a quadrilateral; the paper box pushing mechanism pushes the unfolded quadrilateral paper box into the spindle mechanism. The core shaft mechanism moves the paper box sequentially to the bottom heating mechanism, the bottom pleating mechanism, the bottom sealing mechanism, and the paper box unloading mechanism; the paper box unloading mechanism unloads the paper box with the bottom already sealed to the paper box conveying mechanism; The carton conveying mechanism sequentially conveys the carton to the lid welding mechanism, the vacuum dust removal mechanism, the primary top pleating mechanism, the primary filling mechanism, the secondary filling mechanism, the primary top heating mechanism, the secondary top heating mechanism, the secondary top pleating mechanism, the primary top sealing mechanism, the secondary top sealing mechanism, and finally to the product discharge mechanism.

2. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 1, characterized in that, It also includes a servo filling device, comprising a filling mechanism, a filling drive mechanism, and a filling press mechanism.

3. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 2, characterized in that, The cardboard tray holder contains multiple cardboard trays; the cardboard tray picking mechanism uses a set of vacuum suction cups to remove the cardboard trays from the cardboard tray holder, simultaneously unfolding them into quadrilateral shapes; the cardboard tray pushing mechanism pushes the unfolded quadrilateral cardboard trays along guide rails at the corners of the cardboard trays into the spindle mechanism, where the top of the cardboard tray is clamped by a spring plate on the spindle.

4. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 3, characterized in that, The bottom heating mechanism uses hot air to heat and soften the polyethylene coated on the bottom surface of the cardboard box.

5. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 3, characterized in that, The bottom pleating mechanism folds the bottom of the cardboard box at a differential speed using two pairs of pleats. At the same time, the J-shaped bottom pleat folds the J-shaped bottom of the cardboard box. To prevent the cardboard box from shifting upwards during bottom pleating, the cardboard box positioning mechanism positions the cardboard box before bottom pleating and releases the cardboard box after pleating is completed.

6. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 3, characterized in that, After pleating, the bottom of the cardboard box transitions along the guide rail of the bottom transition mechanism to the bottom sealing mechanism; the bottom sealing mechanism applies pressure to seal the bottom of the cardboard box, while simultaneously cooling the softened polyethylene with ice water to ensure a firm bond at the bottom of the cardboard box, preventing liquid leakage from the gaps in the bonded box; the cardboard box unloading mechanism unloads the cardboard box, which has already been sealed at the bottom, from the mandrel to the cardboard box conveying mechanism.

7. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 6, characterized in that, The lid welding mechanism loads the lid onto the anvil on the slide. After the anvil rotates 180°, the lid is aligned with the hole of the lifted cardboard box lid. The anvil and welding head are pushed together and squeezed. The lid flange and the PE film on the inner surface of the cardboard box are welded and sealed by ultrasonic welding.

8. The carton forming device and servo filling device of the barn-type rooftop packaging box filling machine according to claim 7, characterized in that, The vacuum dust removal mechanism can extend the exhaust pipe into the bottom of the cardboard box, adsorbing and expelling impurity particles while simultaneously lifting them to the outside of the top of the cardboard box.

9. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 8, characterized in that, The first-stage top pleating mechanism inserts the cardboard box baffle into the top crease inside the cardboard box and pre-pleats the top of the cardboard box using a pair of triangular blades; the second-stage top pleating mechanism pleats the pre-pleated top of the cardboard box again using two pairs of pleating devices.

10. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 9, characterized in that, The primary filling mechanism fills the cardboard box with liquid from the primary filling nozzle as the box descends after it is raised to a certain height. The secondary filling mechanism fills the remaining liquid into the cardboard box from the secondary filling nozzle.

11. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 10, characterized in that, The primary top heating mechanism uses hot air to heat and soften the polyethylene coated on the top surface of the cardboard box; the secondary top heating mechanism heats and softens the polyethylene coated on the top surface of the cardboard box again.

12. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 11, characterized in that, The primary top sealing mechanism applies pressure to seal the top of the cardboard box, while simultaneously cooling the softened polyethylene with ice water to ensure a firm bond at the top of the box, preventing liquid leakage from the gaps in the bond. The secondary top sealing mechanism applies pressure and cools the top of the cardboard box again after the primary top sealing.

13. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 2, characterized in that, The filling mechanism includes a feed valve, a valve for the CIP spray ball, a liquid buffer tank, a liquid level sensor, a pipe for the CIP spray ball, a breathing pipe, a liquid pipe, a piston cylinder, and a filling nozzle.

14. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 13, characterized in that, The filling nozzle includes a filling nozzle cylinder, a filling nozzle connecting rod, a filling nozzle diaphragm, a filling nozzle spring pressure plate, a filling nozzle spring, a filling nozzle valve seat, a filling nozzle check valve, a filling nozzle cavity, a mesh, and a filling nozzle valve seat cavity.

15. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 14, characterized in that, The filling drive mechanism includes a piston cylinder, a piston cylinder connecting rod, a piston cylinder diaphragm, a piston cylinder spring pressure plate, a piston cylinder spring, a piston cylinder valve seat, a piston cylinder check valve, a piston cylinder cavity, a piston, a piston cylinder, a piston pressing rod, a piston pressing rod guide sleeve, a universal joint for connecting the piston pressing rod, a connecting plate for the universal joint, a connecting plate for the piston pressing shaft, a piston pressing shaft, a linear bearing for the piston pressing shaft, a nut for the lead screw, a lead screw, a proximity switch for detecting the piston pressing shaft, a synchronous pulley for driving the lead screw, a synchronous pulley tensioning sleeve for driving the lead screw, a filling synchronous belt, a synchronous pulley tensioning sleeve for driving the servo motor, a synchronous pulley for driving the servo motor, a filling servo motor, and a valve seat cavity for the piston cylinder.

16. The carton forming device and servo filling device of a barn-type rooftop packaging box filling machine according to claim 15, characterized in that, The filling and pressing mechanism includes a filling and pressing rod, a filling and pressing cardboard box pressure plate, a filling and pressing cardboard box pressing rod, a guide sleeve for the cardboard box pressing rod, a filling and pressing synchronous belt, a servo motor driven synchronous belt pulley, a servo motor driven synchronous belt pulley tensioning sleeve, a filling and pressing servo motor, a proximity switch for detecting the filling pressing rod, a guide sleeve for the filling and pressing rod, a filling and pressing bracket, and a filling and pressing push plate.

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