Plastic box cover sealing device
By setting a slope-shaped shovel on the lower edge of the push head of the plastic box cover device, the problem of the insertion tongue being unable to insert the plastic box opening is solved, and a more stable sealing effect is achieved.
Patent Information
- Application Number
- CN202421039891.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-05-14
AI Technical Summary
During the sealing process of the plastic box, due to the unstable folding of the box cover and the insertion tongue, the insertion tongue cannot be inserted smoothly into the opening of the plastic box, affecting the sealing effect.
A plastic box cover device is designed, and a slope-shaped shovel is arranged on the lower edge of the pusher to ensure that the insertion tongue can be inserted into the plastic box opening smoothly. With the design of the sloped spatula, the insertion tongue is shoveled and further folded upward during the capping process, ensuring that the insertion tongue can be fully inserted into the opening.
It effectively solves the problem that the tongue cannot be inserted into the plastic box opening, ensures the sealing and stability of the cover, and improves the automation of the packaging process.
Smart Images
Figure CN222820302U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging, in particular to a plastic box capping device. Background Art
[0002] Product packaging containers are mainly used to beautify the packaged products and protect them. Box packaging containers made of plastic have many characteristics such as low density, light weight, easy processing, and transparent or opaque appearance, so they are widely used.
[0003] Most products are now packaged in square box containers that are easy to arrange and stack. Similar plastic boxes are often folded into a flat shape before use. Fig.12 In the process of automatic packaging of products, the original flat packaging box needs to be expanded to form Fig.13 At this time, the top surface of the plastic box 9b is horizontally located above the bottom surface 901, the front and rear side surfaces are in a vertical state, the front side ears 902 and the rear side ears 903 are in a vertical state, and the box cover 904 and the insert tongue 905 are in a horizontal state; then, the product is loaded into the plastic box; finally, the front and rear side ears are folded relative to each other, and finally the cover is formed as shown. Fig.14 However, during the process of folding the box cover 904 and the inserting tongue 905 to seal the opening of the plastic box, since the plastic box has high elasticity, the inserting tongue 905 cannot be inserted into the opening of the plastic box after being folded. Utility Model Content
[0004] The utility model aims to provide a plastic box cover device, the structure of which can ensure that an inserting tongue is inserted into an opening of the plastic box.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A plastic box capping device is used on a product packaging machine, the product packaging machine comprises a packaging frame, a packaging conveyor belt arranged on the packaging frame, a transfer and opening device for first adsorbing the plastic box to be opened and transferring it to the packaging conveyor belt, and then completely opening the plastic box to be opened, a flanging device for flanging the front and rear side ears of the opened plastic box, and a capping device for capping the box cover of the plastic box; the capping device comprises a guide plate mechanism and a cover pushing mechanism both arranged on one side of the packaging conveyor belt, the cover pushing mechanism is located in front of the guide plate mechanism; the cover pushing mechanism comprises a capping cylinder fixed on the packaging frame, a push head driven by the capping cylinder, the lower edge of the push head has a sloped shovel facing the opening direction of the plastic box, the width of the sloped shovel is smaller than the width of the plastic box opening, and the bottom surface of the sloped shovel is slightly higher than the lower edge of the plastic box opening.
[0007] By adopting the above technical solution, a sloped shovel is provided at the lower edge of the push head, so that during the process of sealing the plastic box, the upper surface of the sloped shovel will shovel the insert tongue, causing the insert tongue to further fold upward. At the same time, since the bottom surface of the sloped shovel is slightly higher than the lower edge of the plastic box opening and the width is smaller than the width of the plastic box opening, it can be ensured that the insert tongue can be smoothly inserted into the plastic box opening.
[0008] As a further solution of the utility model: the guide plate mechanism includes an upper guide plate, a middle guide plate and a lower guide plate, the upper guide plate is fixed on the packaging machine frame, the middle guide plate is horizontally arranged below the upper guide plate, and the lower guide plate is horizontally arranged below the middle guide plate, wherein the upper guide plate and the middle guide plate are spaced apart to form a first gap, and the lower guide plate and the middle guide plate are spaced apart to form a second gap.
[0009] As a further solution of the utility model: the middle guide plate has a straight outer edge and an inner inclined guide edge connected to the rear of the straight outer edge, the lower guide plate includes a narrow portion and a wide portion, the inner edge of the wide portion extends inward, and the outer edge is flush with the outer edge of the narrow portion, the narrow portion has a straight inner edge and an inner inclined guide edge connected to the rear of the straight inner edge, wherein the inner inclined guide edge of the middle guide plate and the inner inclined guide edge of the lower guide plate form a bell mouth.
[0010] As a further solution of the utility model: the rear end of the protruding area of the wide part of the lower guide plate relative to the narrow part has a ramp. With the above technical solution, the ramp can further force the plug tongue to fold upward and guide the plug tongue to completely slide to the upper surface of the wide part of the lower guide plate.
[0011] As a further solution of the utility model: the packaging conveyor belt is composed of two conveyor belts arranged on the packaging machine frame at a longitudinal interval.
[0012] As a further solution of the utility model: a plurality of clamps are arranged at intervals on the packaging conveyor belt along the transmission direction, each clamp is composed of a pair of side-by-side U-shaped blocks, two U-shaped blocks of the pair of side-by-side U-shaped blocks are each fixed on a conveyor belt, and the inner edge of the notch of each U-shaped block is chamfered.
[0013] As a further solution of the utility model: the transfer and opening device includes an opening mechanism arranged at the end of the packaging frame and a transfer mechanism arranged behind the opening mechanism, the transfer mechanism includes a transfer frame located behind the packaging frame, a swing motor arranged on the transfer frame, a swing arm driven by the swing motor, a suction cup cylinder arranged at the end of the swing arm, and a suction cup driven to rise and fall by the suction cup cylinder; the opening mechanism includes an air blowing nozzle located on one side of the packaging conveyor belt, the air blowing port facing the opening of the plastic box to be opened, and a side pushing assembly located above the packaging conveyor belt.
[0014] With the above technical solution, the suction cup sucks the bottom surface of the plastic box to be opened downward, and the air blowing nozzle blows air on the top surface of the opening edge of the plastic box to be opened, so that the opening of the plastic box is slightly opened first, and the side push plate cylinder drives the side push plate to push the front side of the plastic box from the side, so that while the suction cup pulls the bottom surface of the plastic box downward, the front side is pushed by the side push plate and then drives the top surface of the plastic box to flip upward and the rear side to flip backward. When the front side and rear side of the plastic box are flipped into a vertical state, the entire box is naturally pulled into the card slot, and finally the plastic box is completely transformed into a stretched state. The air blowing nozzle blows air, which can exert an upward blowing force on the top surface of the plastic box, and at the same time, the suction cup has a downward pulling force on the bottom surface of the plastic box, so that the top surface moves upward during the downward movement of the bottom surface, which is more conducive to the plastic box being stretched open.
[0015] As a further solution of the utility model: the flanging device includes a flanging cylinder arranged on one side of the packaging conveyor belt, an ear punching block driven by the flanging cylinder, and a flanging guide plate vertically arranged in front of the flanging cylinder. The flanging guide plate is arranged at intervals on the inner side of the upper guide plate. The flanging guide plate has a straight portion extending along the conveying direction of the conveyor belt and an inclined guide portion inclined outwardly located behind the straight portion. The flanging cylinder is arranged to be inclined upward.
[0016] In summary, in the utility model, a ramp plate is provided at the wide part of the lower guide plate, and the ramp plate can further force the plug tongue to fold upward, and guide the plug tongue to completely slide to the upper surface of the wide part of the lower guide plate. By providing a ramp-shaped shovel on the push head, the upper surface of the ramp-shaped shovel will shovel the plug tongue during the capping process of the plastic box, so that the plug tongue is further folded upward. At the same time, because the bottom surface of the ramp-shaped shovel is slightly higher than the lower edge of the plastic box opening, and the width is smaller than the width of the plastic box opening, it can ensure that the plug tongue can be smoothly inserted into the plastic box opening. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described below in conjunction with the accompanying drawings.
[0018] Figure 1 It shows that the transfer and opening device absorbs the plastic box to be opened that is transported to the outlet of the feeding conveyor belt and transfers it to the packaging conveyor belt;
[0019] Figure 2 It is a structural schematic diagram of a plastic box capping device of the utility model;
[0020] Figure 3 yes Figure 2 The enlarged view of point A in the middle;
[0021] Figure 4 It shows that the suction cup sucks the plastic box to be opened in a horizontal posture and is located above the fixture;
[0022] Figure 5 The side push plate cylinder drives the side push plate to push the front side of the plastic box from the side;
[0023] Figure 6 It shows that the plastic box is fully opened after entering the fixture;
[0024] Figure 7 It is a structural schematic diagram of the flanging device of the utility model;
[0025] Figure 8 It is a schematic diagram of the mechanism of the capping device of the utility model;
[0026] Fig. 9 The box cover is shown to be located in the first gap, and the inserting tongue is located in the second gap;
[0027] Fig.10 It is a structural schematic diagram of the cover pushing mechanism of the utility model;
[0028] Fig.11 The capping cylinder drives the push head to extend and push the box cover into the box;
[0029] Fig.12 It shows that the plastic box to be opened is in a sideways posture;
[0030] Fig.13 It shows the plastic box fully expanded;
[0031] Fig.14 It shows the folding molding of the plastic box;
[0032] Fig.15 It is a structural schematic diagram of the automatic box loading mechanism of the utility model. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0034] See also Figure 1 and Figure 2 As shown, the utility model is a plastic box capping device, which is used in a product packaging machine. The product packaging machine includes a packaging frame 10, a packaging conveyor belt 11 arranged on the packaging frame 10, a transfer and opening device 20 for first adsorbing the plastic box to be opened and transferring it to the packaging conveyor belt, and then opening the plastic box to be opened, a flanging device 30 for flanging the front and rear side ears of the opened plastic box, and a capping device 50 for sealing the lid of the plastic box.
[0035] It should be noted here that the plastic box is flat before use. Fig.12 They are placed sideways on the feeding conveyor belt 8. During the automatic boxing process of the products, the original flat plastic box will be stretched to form a Fig.13 Then put the product into the box from the opening of the plastic box; then fold the two side ears relative to each other, and finally seal the lid to form a Fig.14 , complete the product packaging.
[0036] like Figure 2 As shown, the packaging conveyor belt 11 is composed of two conveyor belts 111 longitudinally spaced apart on the packaging frame 10. There is a spacing interval between the two conveyor belts 111. A plurality of fixtures 12 are spaced apart on the packaging conveyor belt 11 along the transmission direction. The width of the slot of each fixture 12 is adapted to the width of the bottom surface 901 of the plastic box. Each fixture 12 is composed of a pair of U-shaped blocks 121 arranged side by side, and the two U-shaped blocks 121 of the pair of U-shaped blocks arranged side by side are each fixed on a conveyor belt 111. The inner edge of the notch of each U-shaped block 121 is chamfered.
[0037] Figure 2 As shown, the transfer and opening device 20 includes an opening mechanism 21 arranged at the end of the packaging frame and a transfer mechanism 22 arranged behind the opening mechanism.
[0038] like Figure 2 and Figure 3 As shown, the transfer mechanism 22 includes a transfer frame 221 located behind the packaging frame, a swing motor 222 disposed on the transfer frame 221, a swing arm 223 driven by the swing motor 222, a suction cup cylinder 224 disposed at the end of the swing arm 223, and a suction cup 225 driven to rise and fall by the suction cup cylinder 224. The extension direction of the suction cup cylinder 224 is perpendicular to the swing arm 223.
[0039] like Figure 2 and Figure 3 As shown, the opening mechanism 21 includes a blowing nozzle 211 fixed at the end of the packaging frame, the blowing port of which faces the opening of the plastic box to be opened, a support plate lifting cylinder 212, a support plate 213 driven to rise and fall by the support plate lifting cylinder 212, and a side push assembly arranged above the support plate 213. The side push assembly includes a side push plate 214 arranged above the support plate 213, and a side push plate cylinder 215 driving the side push plate 214. Among them, the side push plate cylinder 215 is fixed on the packaging frame and tilted downward, and has a piston rod extending downward. The side push plate 214 is rotatably connected to the piston rod end of the side push plate cylinder 215, and the lower end is hinged to the top surface of the support plate 213.
[0040] During operation, the swing motor 222 drives the swing arm 223 to swing toward the exit of the upper material conveyor belt 8, and the suction cup cylinder 224 extends during the upward swing of the swing arm 223, so that the suction cup 225 becomes extended. When the swing arm 223 swings upward to a vertical state, the suction cup 225 can just suck the bottom surface 901 of a plastic box 9a to be opened at the front position. The plastic box 9a to be opened serves as the current plastic box to be opened. Subsequently, the swing motor 222 drives the swing arm 223 to swing downward to the conveyor belt 111. Since the two conveyor belts 111 and the two U-shaped blocks of a fixture 12 are spaced apart, the front end of the swing arm 223 can pass between the two conveyor belts 111 and between the two U-shaped blocks of the fixture 12, such as Figure 3 In this way, the swing arm 223 swings to transfer the sucked plastic box 9a to be opened to the top of the waiting fixture 12. At this time, the plastic box 9a to be opened changes from the sideways posture on the feeding conveyor belt 8 to a flat posture above the fixture 12, wherein the bottom surface 901 of the plastic box 9a to be opened is aligned with the width and is located directly above the fixture 12.
[0041] Combination Figure 4 , Figure 5 and Figure 6 As shown, when the plastic box 9a to be opened is transferred by the swing arm to be located above the corresponding fixture 12 in a horizontal posture, the suction cup cylinder 224 retracts and drives the suction cup 225 downward, sucking the bottom surface 901 of the plastic box 9a to be opened downward, and at the same time, the blowing nozzle 211 blows air on the top surface 907 of the opening edge of the plastic box 9a to be opened, so that the opening of the plastic box 9a is slightly opened first, and the side push plate cylinder 215 drives the side push plate 214 to push the front side surface 906 of the plastic box 9a from the side, so that the suction cup 225 pulls the bottom surface 901 of the plastic box 9a downward while the front side surface is pushed by the side push plate 214 and then drives the top surface 907 of the plastic box 9a to flip upward and the rear side to flip backward. When the front side surface 906 and the rear side surface of the plastic box 9a are flipped to a vertical state, the entire box is naturally pulled into the card slot, and finally the plastic box 9a is completely transformed into an opened state. Then, the suction cup 225 releases the bottom surface 901 of the plastic box. The blowing nozzle 211 is used to blow air, which can exert an upward blowing force on the top surface of the plastic box 9a, and at the same time, the suction cup exerts a downward pulling force on the bottom surface of the plastic box 9a, so that the top surface moves upward during the downward movement of the bottom surface, which is more conducive to the plastic box being opened. Because, if there is no blowing force on the top surface of the plastic box 9a, when the suction cup 225 pulls down the bottom surface of the plastic box 9a, the top surface of the plastic box 9a will not move upward, but will fall together with the bottom surface of the plastic box 9a, which will lead to failure in opening the plastic box.
[0042] When the plastic box is fully opened, it forms a Fig.13The fully opened plastic box 9b is shown in the figure, at this time, the bottom surface 901 of the plastic box 9b is attached to the bottom surface of the fixture 12, the front side ears 902 and the rear side ears 903 of the plastic box 9b are in a vertical state, and the box cover 904 and the plug tongue 905 are in a horizontal state. Subsequently, the support plate lifting cylinder 212 drives the support plate 213 to rise, and when the bottom surface of the support plate 213 is higher than the top surface 907 of the plastic box 9b, the packaging conveyor belt 11 drives the plastic box to pass from under the support plate 213 to move toward the flanging device 30, and the next empty fixture 12 behind is transferred to the rear of the support plate 213, and then the support plate lifting cylinder 212 drives the support plate 213 to descend to the initial position to perform the opening molding of the next plastic box 9a.
[0043] like Figure 1 and Fig.15 As shown, an automatic boxing mechanism 40 for products is also provided between the opening mechanism and the flanging device. The automatic boxing mechanism 40 adopts a structure in which a cylinder drives a push rod. When the plastic box 9b is delivered to the product boxing station 401, the product pushing cylinder 402 drives the push rod 403 to push the product in the product mold 405 on the product conveyor belt 404 into the plastic box 9b through the guide groove 406 from the side opening of the plastic box 9b. The automatic boxing mechanism 40 is a prior art and will not be described in detail here.
[0044] like Figure 2 and Figure 7 As shown, the flanging device 30 includes a flanging cylinder 31 disposed on the right side of the packaging conveyor belt, an ear punching block 32 driven by the flanging cylinder, and a flanging guide plate 33 located in front of the flanging cylinder 31, and the flanging guide plate 33 extends along the conveying direction. The flanging guide plate 33 is vertically fixed on the packaging frame.
[0045] like Figure 7As shown, the flanging guide plate 33 has a straight portion extending along the conveying direction of the packaging conveyor belt and an inclined guide portion inclined outwardly located behind the straight portion. The flanging cylinder 31 is arranged to be inclined upward. The ear punching block 32 is initially located below the packaging conveyor belt, allowing the stretched plastic box 9b to pass through. When the stretched plastic box 9b is conveyed to the flanging device 30, the front side ear 902 of the plastic box 9 is first pressed by the inclined guide portion of the flanging guide plate 33, and the front side ear 902 is forced to fold inwardly during the forward movement of the plastic box 9. When the plastic box 9 passes the position of the ear punching block 32, the flanging cylinder 31 drives the ear punching block 32 to flip upward, and strikes the rear side ear 903 from behind the rear side ear 903, thereby causing the rear side ear 903 to fold inwardly. After the plastic box 9b is flanging, the packaging conveyor belt 11 drives the plastic box 9b to move toward the capping device 50. During the movement, the front and rear side ears of the plastic box are pressed by the straight portion of the flanging guide plate 33 to keep the state of being folded inward. After hitting the rear side ears, the ear punching block 32 is then driven by the flanging cylinder 31 to flip down and return to the initial position, waiting for the packaging conveyor belt to convey the next plastic box to perform the next flanging action.
[0046] like Figure 2 , Figure 7 , Figure 8 and Fig. 9 As shown, the capping device 50 includes a guide plate mechanism 51 and a cap pushing mechanism 52, both of which are arranged on one side of the packaging conveyor belt. The cap pushing mechanism 52 is located in front of the guide plate mechanism 51. The guide plate mechanism 51 includes an upper guide plate 511, a middle guide plate 512 and a lower guide plate 513. Among them, the upper guide plate 511, the middle guide plate 512 and the lower guide plate 513 all extend along the length direction of the packaging conveyor belt.
[0047] like Figure 7 , Figure 8 and Fig.10 As shown, the upper guide plate 511 is fixed sideways at intervals on the upper outer side of the flange guide plate 33, and the lower edge of the upper guide plate 511 is composed of a horizontal straight lower edge 5111 and an inclined lower edge 5112 connected to the rear of the horizontal straight lower edge 5111. The inclined lower edge 5112 is higher at the rear end and lower at the front end, and the rear end starting point of the inclined lower edge 5112 is slightly behind the rear end starting point of the flange guide plate 33 and higher than the top of the box cover 904 in a horizontal state, and the rear end end point is located in front of the inclined guide portion, and the straight lower edge 5111 is lower than the upper edge of the straight portion of the flange guide plate 33.
[0048] The middle guide plate 512 is horizontally fixed on the outer surface of the straight portion of the flanging guide plate 33 , and the middle guide plate 512 has a straight outer edge and an inner inclined guide edge connected to the rear of the straight outer edge.
[0049] like Figure 7 , Figure 8 and Fig.10 As shown, the lower guide plate 513 is horizontally arranged below the middle guide plate 512. The upper guide plate 511 and the middle guide plate 512 are spaced apart to form a first gap 514. The lower guide plate 513 and the middle guide plate 512 are spaced apart to form a second gap 515. The lower guide plate 513 includes a narrow portion 5131 and a wide portion 5132. The inner edge of the wide portion 5132 extends inwardly, and the outer edge is flush with the outer edge of the narrow portion 5131. The narrow portion 5131 has a straight inner edge and an inner inclined guide edge connected to the rear of the straight inner edge. The inner inclined guide edge of the middle guide plate 512 and the inner inclined guide edge of the lower guide plate 513 form a bell mouth 516 with a large rear end and a small front end. Thus, when the plastic box 9b is conveyed to the capping device 50, the box cover 904 of the plastic box 9b is first pressed by the inclined lower edge 5112 of the upper guide plate 511 to gradually tilt downward, and in the process of the plastic box 9b moving forward, the box cover 904 is forced to maintain a downward tilted posture and enter the first gap 514, while the inserting tongue 905 is gradually folded inward under the guidance of the bell mouth 516, and enters the second gap 515 in the process of the plastic box 9b moving forward. When the box cover 904 is completely located in the first gap 514 and the inserting tongue 905 is completely located in the second gap 515, the box cover 904 and the inserting tongue 905 appear on the plastic box as shown in the following figure. Fig. 9 Status shown.
[0050] like Fig.10 As shown, the cap pushing mechanism 52 includes a pushing head 521 located above the wide portion 5132 of the lower guide plate 513, and a capping cylinder 522 fixed on the packaging machine frame to drive the pushing head 521. A ramp 5133 is provided at the rear end of the protruding area of the wide portion 5132 of the lower guide plate 513 relative to the narrow portion 5131. The ramp 5133 can further force the inserting tongue 905 to fold upward, and guide the inserting tongue 905 to completely slide to the upper surface of the wide portion 5132 of the lower guide plate 513.
[0051] like Fig.10 and Fig.11 As shown, a sloped shovel 5211 is provided at the lower edge of the push head 521, facing the opening direction of the plastic box. The width of the sloped shovel 5211 is smaller than the width of the plastic box opening, and the bottom surface of the sloped shovel 5211 is slightly higher than the lower edge of the plastic box opening, thereby ensuring that the plug tongue 905 can finally be inserted into the plastic box. When the plastic box is transported to the cover pushing mechanism 52, the push head 521 pushes the box cover 904 to move toward the opening of the plastic box under the drive of the capping cylinder 522. During the movement, the upper surface of the sloped shovel 5211 will shovel the plug tongue 905, so that the plug tongue 905 is further gradually folded upward, thereby ensuring that the plug tongue 905 can be smoothly inserted into the opening of the plastic box.
[0052] During operation, the swing motor 222 drives the swing arm 223 to swing toward the exit of the upper material conveyor belt 8, and the suction cup cylinder 224 extends during the upward swing of the swing arm 223, so that the suction cup 225 becomes extended. When the swing arm 223 swings upward to a vertical state, the suction cup 225 can just adsorb the bottom surface 901 of a plastic box 9a to be opened at the front position. The plastic box 9a to be opened is used as the current plastic box to be opened. Subsequently, the swing motor 222 drives the swing arm 223 to swing downward to the packaging conveyor belt 11. The front end of the swing arm 223 passes between the two forming belts 3021, and the plastic box 9a to be opened is horizontally located directly above the corresponding fixture 12. Subsequently, the suction cup cylinder 224 drives the suction cup 225 to suck the plastic box 9a to be opened downward.
[0053] During the downward movement of the plastic box 9a to be opened, the air blowing nozzle 211 blows air to the top surface 907 of the opening edge of the plastic box 9a to be opened, so that the opening of the plastic box 9a is slightly opened first, and the side push plate cylinder 215 drives the side push plate 214 to push the front side 906 of the plastic box 9a from the side, so that the suction cup 225 pulls the bottom surface 901 of the plastic box 9a downward, and the front side 906 is pushed by the side push plate 214 to drive the top surface 907 of the plastic box 9a to turn upward and the rear side to turn backward. When the front side and the rear side of the plastic box 9a are turned into a vertical state, the whole box is naturally pulled into the card slot, and finally the plastic box 9a is completely transformed into the open state. Subsequently, the suction cup 225 is separated from the bottom surface 901 of the plastic box. The support plate lifting cylinder 212 drives the support plate 213 to rise. When the bottom surface of the support plate 213 is higher than the top surface 907 of the plastic box 9b, the packaging conveyor belt 11 drives the plastic box to move from the bottom of the support plate 213 to the flanging device 30, so that the next empty fixture 12 at the rear is transferred to the rear of the support plate 213. Subsequently, the support plate lifting cylinder 212 drives the support plate 213 to descend to the initial position to expand and form the next plastic box 9a.
[0054] When the plastic box 9b is transferred to the product box loading station, the product pushing cylinder 401 drives the push rod 402 to push the product in the product mold 404 on the product conveyor belt 403 into the plastic box 9b from the opening of the plastic box 9b through the material guide groove 405.
[0055] When the plastic box 9b is transferred to the flanging device 30, the guide surface of the flanging guide plate 33 first contacts the front side ear 902 of the plastic box 9b, and promotes the front side ear 902 to fold inwards during the forward movement of the plastic box 9b. Subsequently, when the plastic box 9 passes the position of the ear punching block, the flanging cylinder 31 drives the ear punching block 32 to flip upwards, and strikes the rear side ear 903 from the outside behind the rear side ear 903, thereby causing the rear side ear 903 to fold inwards. After the plastic box 9b is flanging, the packaging conveyor belt 11 drives the plastic box 9b to move to the capping device 50. During the movement, the front and rear side ears of the plastic box are pressed by the straight portion of the flanging guide plate 33 to keep the state of folding inwards. The ear punching block 32 that has struck the rear side ear flips downwards and returns to the initial position under the drive of the flanging cylinder 31, waiting for the packaging conveyor belt to transmit the next plastic box to perform the next flanging action.
[0056] When the plastic box 9b is conveyed to the capping device 50, the box cover 904 of the plastic box 9b is first pressed by the inclined lower edge 5112 of the upper guide plate 511 to gradually tilt downward, and in the process of the plastic box 9b moving forward, the box cover 904 is forced to maintain a downward tilted posture and enter the first gap 514, and the plug tongue 905 is gradually folded inward under the guidance of the bell mouth 516, and enters the second gap 515 in the process of the plastic box 9b moving forward. When the plastic box is conveyed to the capping mechanism 52, the push head 521 pushes the box cover 904 to move toward the opening of the plastic box under the drive of the capping cylinder 522. During the movement, the upper surface of the sloped shovel 5211 will shovel the plug tongue 905, so that the plug tongue 905 is further gradually folded upward, thereby ensuring that the plug tongue 905 can be smoothly inserted into the opening of the plastic box, and the plastic box is folded into shape.
[0057] In summary, in the utility model, a ramp plate is provided at the wide part of the lower guide plate, and the ramp plate can further force the plug tongue to fold upward, and guide the plug tongue to completely slide to the upper surface of the wide part of the lower guide plate. By providing a ramp-shaped shovel on the push head, the upper surface of the ramp-shaped shovel will shovel the plug tongue during the capping process of the plastic box, so that the plug tongue is further folded upward. At the same time, because the bottom surface of the ramp-shaped shovel is slightly higher than the lower edge of the plastic box opening, and the width is smaller than the width of the plastic box opening, it can ensure that the plug tongue can be smoothly inserted into the plastic box opening.
[0058] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.
Claims
1. A plastic box capping device, used in a product packaging machine, the product packaging machine comprises a packaging frame, a packaging conveyor belt arranged on the packaging frame, a transfer and opening device for first adsorbing the plastic box to be opened and transferring it to the packaging conveyor belt, and then completely opening the plastic box to be opened, a flanging device for flanging the front and rear side ears of the opened plastic box, and a capping device for capping the box cover of the plastic box; the capping device comprises a guide plate mechanism and a cover pushing mechanism both arranged on one side of the packaging conveyor belt, the cover pushing mechanism is located in front of the guide plate mechanism; it is characterized in that The cap pushing mechanism includes a capping cylinder fixed on a packaging machine frame and a pushing head driven by the capping cylinder. The lower edge of the pushing head has a sloped shovel facing the opening direction of the plastic box. The width of the sloped shovel is smaller than the width of the plastic box opening, and the bottom surface of the sloped shovel is slightly higher than the lower edge of the plastic box opening.
2. The plastic box capping device according to claim 1, characterized in that: The guide plate mechanism includes an upper guide plate, a middle guide plate and a lower guide plate, wherein the upper guide plate is fixed on the packaging machine frame, the middle guide plate is horizontally arranged below the upper guide plate, and the lower guide plate is horizontally arranged below the middle guide plate, wherein the upper guide plate and the middle guide plate are spaced apart to form a first gap, and the lower guide plate and the middle guide plate are spaced apart to form a second gap.
3. The plastic box capping device according to claim 2, characterized in that: The middle guide plate has a straight outer edge and an inner inclined guide edge connected to the rear of the straight outer edge, the lower guide plate includes a narrow portion and a wide portion, the inner edge of the wide portion extends inward, and the outer edge is flush with the outer edge of the narrow portion, the narrow portion has a straight inner edge and an inner inclined guide edge connected to the rear of the straight inner edge, wherein the inner inclined guide edge of the middle guide plate and the inner inclined guide edge of the lower guide plate form a bell mouth with a large rear end and a small front end.
4. The plastic box capping device according to claim 3, characterized in that: The rear end of the protruding area of the wide portion of the lower guide plate relative to the narrow portion is provided with a ramp.
5. The plastic box capping device according to claim 1, characterized in that: The packaging conveyor belt is composed of two conveyor belts which are arranged on the packaging machine frame at intervals in the longitudinal direction.
6. The plastic box capping device according to claim 5, characterized in that: A plurality of fixtures are arranged at intervals along the transmission direction on the packaging conveyor belt, each fixture is composed of a pair of U-shaped blocks arranged side by side, and the two U-shaped blocks of the pair of U-shaped blocks are each fixed on a conveyor belt, and the inner edge of the notch of each U-shaped block is chamfered.
7. The plastic box capping device according to claim 1, characterized in that: The transfer and opening device includes an opening mechanism arranged at the end of the packaging frame and a transfer mechanism arranged behind the opening mechanism; the transfer mechanism includes a transfer frame located behind the packaging frame, a swing motor arranged on the transfer frame, a swing arm driven by the swing motor, a suction cup cylinder arranged at the end of the swing arm, and a suction cup driven to rise and fall by the suction cup cylinder; the opening mechanism includes an air blowing nozzle located on one side of the packaging conveyor belt, the air blowing port facing the opening of the plastic box to be opened, and a side pushing assembly located above the packaging conveyor belt.
8. The plastic box capping device according to claim 2, characterized in that: The flanging device includes a flanging cylinder arranged on one side of the packaging conveyor belt, an ear punching block driven by the flanging cylinder, and a flanging guide plate vertically arranged in front of the flanging cylinder. The flanging guide plate is arranged at intervals on the inner side of the upper guide plate. The flanging guide plate has a straight portion extending along the conveying direction of the conveyor belt and an inclined guide portion inclined outwardly behind the straight portion. The flanging cylinder is arranged to be inclined upward.