Corner arranging and cutting mechanism and method and packaging machine

Abstract

The invention relates to a corner arranging and cutting mechanism and method and a packaging machine, the corner arranging and cutting mechanism comprises abutting plates, scraper assemblies and corner cutting assemblies, the abutting plates are located on the two opposite sides of a packaging box and used for clamping and fixing the packaging box, and the scraper assemblies are located at the four corners of the packaging box and used for rotating between the corner arranging position and the avoiding position relative to the packaging box; when the scraper assembly is located at the corner arranging position, the corners of the packaging bag are straightened, the scraper assembly is matched with the abutting plate to clamp the corners of the packaging bag, and pulling force in the straightening direction is applied to the corners. When the scraper assembly is located at the avoiding position, the scraper assembly is separated from the corners of the packaging bag. The corner cutting assembly is used for conducting hot cutting and sealing on the straightened corners of the packaging bag. According to the corner arranging and cutting mechanism, the corner arranging and cutting method and the packaging machine, the corner arranging process and the corner cutting process are combined, tensioning force is applied to the corners while the corners are arranged, the corner cutting effect can be guaranteed, and a corner pulling mechanism does not need to be additionally arranged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of product packaging equipment, and particularly relates to an angle straightening and cutting mechanism, an angle straightening and cutting method and a packaging machine. BACKGROUND

[0002] In the field of product packaging processing, in order to achieve neatness and beauty of the transparent packaging film outside the packaging box, the edge and corner of the packaging film need to be straightened and cut. In the prior art, various angle straightening and cutting mechanisms have appeared to replace manual operation.

[0003] For example, the angle straightening and cutting mechanism disclosed in CN103662207A adopts a roller mechanism, a polished rod mechanism or a smooth module mechanism, and the edge and corner at both ends of the packaging bag is straightened by moving along the smooth plane, and then the straightened edge and corner is cut off by the cooperation of the bottom cutter and the hot cutter of the cutting mechanism. In order to solve the problem of residual edge and corner after straightening and cutting, the mechanism needs to be additionally provided with a corner pulling mechanism, which clamps the cut edge and corner and pulls it down, so that the hot cut edge and corner is pulled off, that is, the corner pulling action depends on a special independent mechanism to complete, which increases the complexity of the mechanism. However, the angle straightening mechanism in this scheme only realizes the simple straightening of the edge and corner, and does not apply tension to the film edge and corner during the straightening process, but through the mechanical hand clamping and applying tension after the straightening, the process of pulling the corner is realized.

[0004] Therefore, the straightening and tensioning actions are not synchronized and linked, the tensioning effect of the film edge and corner during the straightening process is limited, which easily leads to the problems of loose or offset edge and corner, burr or misalignment of the joint line, and it is still difficult to avoid the problem of unstable cutting quality. Moreover, the process of pulling the corner needs to be realized by a structure independent of the angle straightening mechanism, which increases the processing cost. SUMMARY

[0005] Therefore, the present application provides an angle straightening and cutting mechanism, a method and a packaging machine to solve the problem of straightening and cutting the transparent packaging film outside the packaging box.

[0006] In order to achieve the above purpose, in a first aspect, the technical solution of the present application to solve the technical problem is to provide an angle straightening and cutting mechanism, comprising: a stop plate, a scraper assembly and a corner cutting assembly, the stop plate is located at opposite sides of the packaging box for clamping and fixing the packaging box, the scraper assembly is located at the four corners of the packaging box for rotating relative to the packaging box between a straightening position and an avoiding position; wherein, when the scraper assembly is located at the straightening position, the edge and corner of the packaging bag is straightened, and the edge and corner of the packaging bag is clamped and fixed together with the stop plate, and a tension along the straightening direction is applied to the edge and corner; when the scraper assembly is located at the avoiding position, the edge and corner of the packaging bag is separated; the corner cutting assembly is used for hot cutting and sealing the straightened edge and corner of the packaging bag.

[0007] In one specific embodiment, the scraping assembly comprises a scraping plate, a scraping plate support and a scraping plate driving member, the scraping plate is rotatably connected with the scraping plate support, and the scraping plate driving member is configured to drive the scraping plate to rotate between the corner straightening position and the avoiding position.

[0008] In one specific embodiment, the scraping plate comprises a connecting portion and a corner straightening portion, the connecting portion is rotatably connected with the scraping plate support, the scraping plate driving member is configured to drive the connecting portion to rotate relative to the scraping plate support, the corner straightening portion is rotatably connected with one end of the connecting portion away from the scraping plate support, and an elastic member is arranged between the corner straightening portion and the connecting portion.

[0009] In one specific embodiment, a rotating hole is arranged on the scraping plate support, the connecting portion is rotatably matched with the rotating hole, the scraping plate driving member comprises a scraping plate cylinder and a push rod, an extension portion is arranged on the connecting portion in a direction perpendicular to an axis direction of the rotating hole, the scraping plate cylinder is connected with the scraping plate support, one end of the push rod is connected with an output end of the scraping plate cylinder, and the other end away from the scraping plate cylinder is connected with the extension portion.

[0010] In one specific embodiment, the corner cutting assembly comprises a cutting knife, a cutting knife support and a cutting knife driving member, the cutting knife driving member is connected with the cutting knife support, the cutting knife is connected with the cutting knife driving member, and the cutting knife driving member is configured to drive the cutting knife to heat cut and seal the corner of the packaging bag.

[0011] In one specific embodiment, the corner straightening and cutting mechanism further comprises a base and four mounting seats, the four mounting seats are all slidably connected with the base, and the abutting plate, the scraping assembly and the corner cutting assembly are all connected with the mounting seats.

[0012] In one specific embodiment, the base comprises a first bottom plate and two second bottom plates, the two second bottom plates are both slidably connected with the first bottom plate in a first direction, the four mounting seats are divided into two groups, each group comprises two mounting seats, and the two groups of mounting seats are arranged on opposite sides of the second bottom plates in a second direction.

[0013] In one specific embodiment, the base further comprises a first driving member and a second driving member; two first guide rails are arranged on the first bottom plate along the first direction, and each of the two second bottom plates is provided with a first sliding block, and the two first guide rails are in sliding cooperation with the first sliding blocks on the two second bottom plates respectively; the first driving member comprises a first driving motor, a first driving wheel, a first driven wheel and a first synchronous belt, the output end of the first driving motor is in transmission connection with the first driving wheel, the first synchronous belt is sleeved on the first driving wheel and the first driven wheel to form a belt transmission, and each of the two second bottom plates is provided with a first connecting block which is connected with the opposite sides of the first synchronous belt respectively; a second guide rail is arranged on the side of the second bottom plate away from the first bottom plate, and each of the two or one mounting seat in each group is provided with a second sliding block which is in sliding cooperation with the second guide rail along the second direction; the second driving member comprises a second driving motor, a second driving wheel, a second driven wheel and a second synchronous belt, the output end of the second driving motor is in transmission connection with the second driving wheel, the second synchronous belt is sleeved on the second driving wheel and the second driven wheel to form a belt transmission, and the second connecting block of each of the two or one mounting seat in each group is connected with the second synchronous belt.

[0014] In the second aspect, the application provides a method for straightening and cutting corners, which comprises the following steps: fixing opposite sides of a packaging box by a stop plate; rotating a scraping plate assembly from a avoiding position to a straightening position to straighten the corners of the packaging bag, and clamping the corners with the stop plate while applying a tension force along the straightening direction to the corners; and cutting and sealing the straightened corners of the packaging bag by a corner cutting assembly.

[0015] In the third aspect, the application provides a packaging machine, which comprises the corner straightening and cutting mechanism, a feeding mechanism and a taking mechanism, the feeding mechanism is used for feeding the packaging box into the corner straightening and cutting mechanism, the corner straightening and cutting mechanism is used for straightening and cutting and sealing the corners of the packaging bag on the packaging box, and the taking mechanism is used for taking away the packaging box after the corners are cut.

[0016] Compared with the prior art, the corner straightening and cutting mechanism, the method and the packaging machine provided by the application have the following beneficial effects: the corners of the packaging bag are straightened by rotating the scraping plate assembly, and after being straightened, the corners are clamped by the stop plate and a tension force along the straightening direction is applied to the corners, so that the processes of straightening and cutting are combined, the tension force is applied to the corners while the corners are straightened, the effect of cutting is guaranteed, and no additional corner pulling mechanism is needed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic view of a corner straightening and cutting mechanism according to the first embodiment of the application; Figure 2 FIG. 2 is a structural schematic view of a corner straightening and cutting mechanism according to the second embodiment of the application;Figure 1 Position relationship schematic view when the middle scraper assembly rotates to the angle arranging position; Figure 3 For Figure 1 Position relationship schematic view when the middle scraper assembly rotates to the angle arranging position; Figure 4 For Figure 1 Explosion structure schematic view of the middle resisting plate; Figure 5 For Figure 1 Structure schematic view of the middle scraper assembly; Figure 6 For Figure 5 Structure schematic view of the middle scraper; Figure 7 For Figure 5 Structure schematic view of the middle scraper support; Figure 8 For Figure 5 Structure schematic view of the middle scraper driving part; Figure 9 For Figure 1 Structure schematic view of the middle angle cutting assembly; Figure 10 Structure schematic view of the base and the mounting seat; Figure 11 For Figure 10 Explosion structure schematic view; Figure 12 Step flow chart of the angle arranging and cutting method provided by the second embodiment of the application; Figure 13 Module schematic view of the packaging machine provided by the third embodiment of the application; Explanation of reference signs: 1, resisting plate; 11, silica gel pad; 12, adsorption groove; 13, adsorption plate; 14, clamping groove; 2, scraper assembly; 21, scraper; 211, connecting part; 212, angle arranging part; 213, extending part; 22, scraper support; 221, rotating hole; 23, scraper driving part; 231, scraper cylinder; 232, push rod; 3, angle cutting assembly; 31, cutter; 32, cutter support; 33, cutter driving part; 4, base; 41, first bottom plate; 411, first guide rail; 42, second bottom plate; 421, first sliding block; 422, first connecting block; 423, second guide rail; 43, first driving part; 431, first driving motor; 432, first driving wheel; 433, first driven wheel; 434, first synchronous belt; 44, second driving part; 441, second driving motor; 442, second driving wheel; 443, second driven wheel; 444, second synchronous belt; 5, mounting seat; 51, second sliding block; 52, second connecting block; 6, feeding mechanism; 7, taking mechanism. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] It should be noted that all direction indications in the embodiments of the present application are only used to explain the relative position relationship and movement between components in a certain posture, and if the certain posture changes, the direction indications also change accordingly.

[0020] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope claimed by the present application.

[0021] As shown in FIG. 1, Figures 1 to 3 The first embodiment of the present application provides a corner straightening and cutting mechanism for straightening and cutting the corners of a packaging bag outside a packaging box N (not shown in the figure), which comprises a stop plate 1, a scraper assembly 2 and a corner cutting assembly 3. The stop plate 1 is located on opposite sides of the packaging box N for clamping and fixing the packaging box N. The scraper assembly 2 is located at the four corners of the packaging box N for rotating relative to the packaging box N between a corner straightening position and an avoiding position. When the scraper assembly 2 is located at the corner straightening position, the corners of the packaging bag are straightened, and the stop plate 1 cooperates to clamp the corners of the packaging bag to exert a pulling force on the corners in the straightening direction. When the scraper assembly 2 is located at the avoiding position, it is separated from the corners of the packaging bag. The corner cutting assembly 3 is used to heat cut and seal the straightened corners of the packaging bag.

[0022] Specifically, in the initial state, the scraper assembly 2 is located at the avoiding position, and the stop plates 1 located on both sides of the packaging box N cooperate to clamp and fix the packaging box N. Then the scraper assembly 2 is rotated to the corner straightening position, so that the four corners of the packaging bag wrapped on the packaging box N are straightened through the rotating process of the scraper assembly 2. Moreover, when the scraper assembly 2 is rotated to the corner straightening position, the scraper assembly 2 is in contact with the stop plate 1, clamping the corners of the packaging bag while exerting a pulling force on the corners in the straightening direction, so as to tighten the corners of the packaging bag, facilitating the subsequent cutting of the corners by the corner cutting assembly 3.

[0023] In one embodiment, as shown in Figure 4 The silicon rubber pad 11 is arranged on one side of the abutting plate 1 close to the scraping plate assembly 2, and the scraping plate assembly 2 is in contact with the silicon rubber pad 11 when the scraping plate assembly 2 is in the corner processing position.

[0024] It can be understood that the silicon rubber pad 11 can be arranged to buffer and protect the packaging bag and / or the scraping plate assembly 2 when the scraping plate assembly 2 is in contact with the abutting plate 1 to clamp the corner of the packaging bag, so as to avoid damage to the packaging bag and / or wear of the scraping plate assembly 2.

[0025] In this embodiment, the abutting plate 1 is provided with a clamping groove 14, the shape of the clamping groove 14 is matched with the silicon rubber pad 11, and the silicon rubber pad 11 is clamped in the clamping groove 14.

[0026] Further, the abutting plate 1 is provided with a suction hole on one side close to the scraping plate assembly 2, and the suction hole is in communication with an external air source.

[0027] In one specific embodiment, the abutting plate 1 is further provided with a suction groove 12, the suction groove 12 is in communication with the external air source, and one side close to the scraping plate assembly 2 has an opening, the opening is provided with a suction plate 13, the suction plate 13 closes the opening, and the suction hole is arranged on the suction plate 13, penetrates through the suction plate 13 and is in communication with the suction groove 12, so as to generate negative pressure at the suction hole.

[0028] The number of suction holes can be multiple, and the multiple suction holes all penetrate through the suction plate 13 and are in communication with the suction groove 12 through the opening.

[0029] It can be understood that the negative pressure generated by the external air source forms a suction force on the corner of the packaging bag through the suction hole, so as to adsorb and recycle the cut corner after the corner cutting assembly 3 cuts off the corner of the packaging bag.

[0030] By adjusting the size of the suction hole, the cut corner can be directly adsorbed and recycled, or the cut corner can be first adsorbed and fixed on the suction plate 13, and then taken away from the suction plate 13 to realize recycling. For example, when the hole diameter of the suction hole is large, the cut corner can be directly sucked into the suction hole, and a recycling air path can be arranged. After the corner is cut off, the cut corner is directly sucked into the suction hole and enters the recycling air path to realize recycling. When the hole diameter of the suction hole is small, the cut corner cannot be directly sucked into the suction hole, and the cut corner can be first adsorbed and fixed on the suction plate 13 by negative pressure, and then taken away from the suction plate 13 after the negative pressure is cancelled to realize recycling.

[0031] It should be noted that the suction plate 13 closes the opening of the suction groove 12 and is flush with the silicon rubber pad 11, so as to facilitate the adsorption of the corner through the suction hole.

[0032] In one embodiment, as shown in Figures 5 to 8As shown, the scraper assembly 2 comprises a scraper 21, a scraper support 22 and a scraper driving member 23, the scraper 21 is rotationally connected with the scraper support 22, and the scraper driving member 23 is used to drive the scraper 21 to rotate between the corner processing position and the avoiding position.

[0033] It can be understood that the scraper support 22 is used to support the scraper 21, and the rotationally connection between the scraper 21 and the scraper support 22 can be any mode such as shaft hole connection, as long as the rotationally connection between the scraper 21 and the scraper support 22 is realized. The scraper driving member 23 can be any driving unit, as long as it can drive the scraper 21 to rotate on the scraper support 22 to realize the rotation between the corner processing position and the avoiding position.

[0034] Further, the scraper 21 comprises a connecting part 211 and a corner processing part 212, the connecting part 211 is rotationally connected with the scraper support 22, the scraper driving member 23 is used to drive the connecting part 211 to rotate relative to the scraper support 22, the corner processing part 212 is rotationally connected with one end of the connecting part 211 away from the scraper support 22, and an elastic member is arranged between the corner processing part 212 and the connecting part 211.

[0035] It can be understood that when the scraper driving member 23 drives the scraper 21 to rotate to the corner processing position, the corner processing part 212 is in contact with the silica gel pad 11 on the abutting plate 1, and under the action of the scraper driving member 23 and the abutting plate 1, the corner processing part 212 and the connecting part 211 are relatively rotated, at this time, the elastic member is elastically deformed to exert an elastic force on the corner processing part 212, and the elastic force is used to exert a tension force on the corner of the packaging bag along the straightening direction.

[0036] By rotationally connecting the corner processing part 212 and the connecting part 211 and arranging the elastic member therebetween, when the corner processing part 212 and the abutting plate 1 clamp the corner of the packaging bag and exert a tension force on the corner, buffering protection is provided to avoid rigid contact and damage to the packaging bag when the tension force is exerted.

[0037] It should be noted that the rotationally connection between the corner processing part 212 and the connecting part 211 can be realized by any mode, and the elastic member can be any elastic element such as torsional spring which can exert an elastic force on the corner processing part 212 and the connecting part 211, as long as the elastic member is elastically deformed and exerts an elastic force on the corner processing part 212 when the corner processing part 212 is relatively rotated relative to the connecting part 211.

[0038] Preferably, the rotationally connection between the corner processing part 212 and the connecting part 211 is realized by arranging a hinge.

[0039] Further, the scraper support 22 is provided with a rotating hole 221, the connecting part 211 is in rotating fit with the rotating hole 221, the scraper driving part 23 comprises a scraper cylinder 231 and a push rod 232, the connecting part 211 is provided with an extension part 213 extending along the direction perpendicular to the axis of the rotating hole 221, the scraper cylinder 231 is connected to the scraper support 22, one end of the push rod 232 is connected to the output end of the scraper cylinder 231, and the end away from the scraper cylinder 231 is connected with the extension part 213.

[0040] It can be understood that when the scraper cylinder 231 works, the push rod 232 can be driven to reciprocate along its axis, and the extension part 213 is pushed during the movement of the push rod 232, so as to drive the connecting part 211 to rotate relative to the rotating hole 221 through the extension part 213, thereby driving the corner straightening part 212 to rotate between the corner straightening position and the avoiding position through the connecting part 211.

[0041] It should be noted that the connecting part 211 and the rotating hole 221 can be in rotating fit through the setting of a bearing, and the extension part 213 can also be at an angle with the axis of the rotating hole 221, and is not limited to being perpendicular to the axis of the rotating hole 221, as long as the reciprocating movement of the push rod 232 can push the extension part 213, thereby driving the connecting part 211 to rotate relative to the rotating hole 221.

[0042] In one specific embodiment, the number of rotating holes 221 is two, and the two ends of the connecting part 211 are respectively in rotating fit with the two rotating holes 221.

[0043] In one embodiment, as shown in Figure 9 , the corner cutting assembly 3 comprises a cutter 31, a cutter support 32 and a cutter driving part 33, the cutter driving part 33 is connected to the cutter support 32, the cutter 31 is connected to the cutter driving part 33, and the cutter driving part 33 is used to drive the cutter 31 to heat cut and seal the straightened corner of the packaging bag.

[0044] It can be understood that the cutter 31 is a heat cutter, the cutter support 32 is used to provide support for the cutter 31 and the cutter driving part 33, and the cutter driving part 33 can be any driving unit such as a cylinder, as long as it can drive the cutter to cut off the straightened corner of the packaging bag.

[0045] In one embodiment, as shown in Figures 10 to 11 , the corner straightening and cutting mechanism further comprises a base 4 and four mounting seats 5, the four mounting seats 5 are all in sliding connection with the base 4, and the abutting plate 1, the scraper assembly 2 and the corner cutting assembly 3 are all connected to the mounting seats 5.

[0046] It is understandable that there are four abutment 1, four scraper assembly 2 and four corner cutting assembly 3. The four abutment 1, four scraper assembly 2 and four corner cutting assembly 3 are respectively connected to four mounting bases 5. By sliding the mounting base 5 on the base 4, the position of the abutment 1, four scraper assembly 2 and four corner cutting assembly 3 relative to the packaging box N can be adjusted, so as to adapt to packaging boxes N of different sizes.

[0047] It should be noted that the sliding connection between the base 4 and the mounting base 5 can be achieved in any way using guide rails and sliders, as long as the mounting base 5 can slide relative to the base 4, thereby adjusting the position of the four mounting bases 5 on the base 4.

[0048] In one specific embodiment, the four abutments 1 are divided into two groups, with two abutments in each group. The two groups of abutments 1 are located on opposite sides of the packaging box N to clamp and fix the packaging box N.

[0049] It should be noted that the support plate 1 can also be any other structure, as long as it can clamp and fix the packaging box N from the opposite sides of the packaging box N, and does not interfere with the cornering of the scraper assembly 2 and the corner cutting assembly 3.

[0050] Furthermore, the base 4 includes a first base plate 41 and a second base plate 42. There are two second base plates 42, and both second base plates 42 are slidably connected to the first base plate 41 along a first direction. The four mounting seats 5 are divided into two groups, with two in each group. The two groups of mounting seats 5 are respectively arranged on opposite sides of the second base plate 42 along a second direction. In this case, one or two mounting seats 5 in each group are slidably connected to the second base plate 42.

[0051] It is understandable that the two second base plates 42 can move closer to each other or further away from each other along the first direction on the first base plate 41, and each set of mounting seats 5 can move closer to each other or further away from each other along the second direction on the second base plate 42, so as to realize the adjustment of the relative positions of the abutment plate 1, scraper assembly 2 and corner cutting assembly 3 on the mounting seat 5 and the packaging box N.

[0052] In this embodiment, the two mounting seats 5 in each group are located on opposite sides of the second base plate 42. One mounting seat 5 is fixedly connected to the second base plate 42, and the other mounting seat 5 is slidably connected to the second base plate 42. By sliding the slidably connected mounting seat 5 relative to the second base plate 42, the two mounting seats 5 in each group can move closer or further apart on the second base plate 42. In some embodiments, both mounting seats 5 in each group can also be slidably connected to the second base plate 42, so that by simultaneously sliding the two mounting seats 5 in each group along the second direction on the second base plate 42, the two mounting seats 5 in each group can move closer or further apart.

[0053] Furthermore, two first guide rails 411 are provided on the first base plate 41 along the first direction, and two first sliders 421 are provided on the two second base plates 42 respectively. The two first guide rails 411 are slidably engaged with the first sliders 421 on the two second base plates 42 respectively.

[0054] It is understandable that the sliding connection between the first base plate 41 and the second base plate 42 can be achieved through the sliding engagement of the first guide rail 411 and the first slider 421.

[0055] In one specific embodiment, the first direction and the second direction are perpendicular to each other.

[0056] Furthermore, the base 4 also includes a first driving member 43, which is used to drive the second base plate 42 to slide relative to the first base plate 41 in a first direction.

[0057] In some embodiments, the first driving member 43 may be omitted, and the second base plate 42 may be slid in the first direction by directly applying external force. When it slides to a predetermined position, the position of the second base plate 42 may be fixed by setting any positioning member such as a positioning pin or a locking block.

[0058] Furthermore, the first driving component 43 includes a first driving motor 431, a first driving wheel 432, a first driven wheel 433, and a first synchronous belt 434. The output end of the first driving motor 431 is connected to the first driving wheel 432 for transmission. The first synchronous belt 434 is sleeved on the first driving wheel 432 and the first driven wheel 433 to form a belt drive. Each of the two second base plates 42 is provided with a first connecting block 422, which is connected to the opposite sides of the first synchronous belt 434 respectively.

[0059] It is understandable that when the first drive motor 431 is working, it drives the first drive wheel 432, the first driven wheel 433 and the first synchronous belt 434 to form a belt drive. After the two second base plates 42 are connected to the opposite sides of the first synchronous belt 434 respectively, when the first synchronous belt 434 is in motion, it can drive the two second base plates 42 to slide on the first base plate 41 in a direction that moves closer to each other or further away from each other.

[0060] It should be noted that the first driving component 43 can also be a cylinder or other driving unit, which directly pushes the two second base plates 42 to slide on the first base plate 41 in a direction that moves closer to or further away from each other.

[0061] Furthermore, a second guide rail 423 is provided on the side of the second base plate 42 away from the first base plate 41, and a second slider 51 is provided on one or two of the mounting seats 5 in each group. The second slider 51 slides in cooperation with the second guide rail 423 along the second direction.

[0062] It is understandable that the sliding connection between the mounting base 5 and the second base plate 42 can be achieved through the sliding engagement of the second guide rail 423 and the second slider 51.

[0063] Furthermore, the base 4 also includes a second driving member 44, which is used to drive the mounting base 5 to slide relative to the second base plate 42 in a second direction.

[0064] In some embodiments, the second driving component 44 may be omitted, and the mounting base 5 may be driven to slide in the second direction by applying external force manually. When it slides to a predetermined position, the position of the mounting base 5 may be fixed by setting any positioning component such as a positioning pin or a locking block.

[0065] Furthermore, the second driving component 44 includes a second driving motor 441, a second driving wheel 442, a second driven wheel 443, and a second synchronous belt 444. The output end of the second driving motor 441 is connected to the second driving wheel 442 for transmission. The second synchronous belt 444 is sleeved on the second driving wheel 442 and the second driven wheel 443 to form a belt drive. A second connecting block 52 is provided on one or two of the mounting seats 5 in each group. The second connecting block 52 is connected to the second synchronous belt 444.

[0066] Understandably, when both mounting seats 5 in each group are slidably connected to the second base plate 42, each of the two mounting seats 5 in each group is provided with a second connecting block 52. The second connecting blocks 52 on the two mounting seats 5 are respectively connected to the opposite sides of the second synchronous belt 444. When the second drive motor 441 works, it drives the second drive wheel 442, the second driven wheel 443, and the second synchronous belt 444 to form a belt drive. When the second synchronous belt 444 is driving, it can drive the two mounting seats 5 in each group to slide simultaneously towards or away from each other on the second base plate 42. However, when only one mounting seat 5 in each group is slidably connected to the second base plate 42, and the other is fixedly connected to the second base plate 42, the second connecting block 52 is only provided on the slidably connected mounting seat 5. When the second synchronous belt 444 is driving, it drives the mounting seat 5 on the second base plate 42 to move towards or away from the other fixedly connected mounting seat 5.

[0067] It should be noted that the second driving component 44 can also be a cylinder or other driving unit, which directly pushes the mounting base 5 to slide on the second base plate 42.

[0068] like Figure 12 As shown, the second embodiment of the present invention provides a method for straightening and cutting corners, including: S100, the opposite sides of the packaging box are fixed by a butt plate; S200, rotate the scraper assembly from the clearance position to the corner straightening position to straighten the corners of the packaging bag, and cooperate with the abutment to clamp the corners, while applying a tension force to the corners in the straightening direction; S300, the corner cutting component heat-cuts and seals the straightened corners of the packaging bag; In this embodiment, an initial gap can be set between the support plates first, then the packaging box can be placed between the initial gaps, and then the gap between the support plates can be adjusted to clamp and fix the opposite sides of the packaging box. After the corner cutting assembly heat-cuts and seals the corners of the packaging bag, the support plates release the packaging box, and the packaging box can be removed from between the support plates.

[0069] like Figure 13 As shown, the third embodiment of the present invention provides a packaging machine, which includes a feeding mechanism 6, a corner straightening and cutting mechanism, and a material picking mechanism 7. The feeding mechanism 6 is used to put the packaging box into the corner straightening and cutting mechanism, the corner straightening and cutting mechanism is used to straighten the corners of the packaging bag on the packaging box and heat-cut and seal it, and the material picking mechanism 7 is used to take away the packaging box after the corners are cut.

[0070] It is understandable that both the feeding mechanism 6 and the unloading mechanism 7 can be robotic arms.

[0071] Compared with the prior art, the corner straightening and cutting mechanism, method and packaging machine provided by the present invention straightens the corners of the packaging bag by rotating the scraper assembly, and after straightening, clamps the corners with the abutment and applies a tension force along the straightening direction, thereby combining the corner straightening and cutting processes. While straightening the corners, a tension force is also applied to the corners, which can ensure the effect of corner cutting, and there is no need to set up an additional corner pulling mechanism.

[0072] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A corner-cutting mechanism, characterized in that, This tool is used to trim and cut the corners of the packaging bag outside the packaging box. It includes: a backing plate, a scraper assembly, and a corner cutting assembly. The backing plate is located on opposite sides of the packaging box and is used to clamp and fix the packaging box. The scraper assembly is located at the four corners of the packaging box and is used to rotate relative to the packaging box between the trimming position and the avoidance position. When the scraper assembly is in the corner straightening position, it straightens the corners of the packaging bag and cooperates with the abutment to clamp the corners of the packaging bag and apply a pulling force to the corners in the straightening direction; when the scraper assembly is in the avoidance position, it separates from the corners of the packaging bag. The corner-cutting component is used to heat-cut and seal the straightened corners of the packaging bag.

2. The corner-cutting mechanism as described in claim 1, characterized in that: The scraper assembly includes a scraper, a scraper bracket, and a scraper drive. The scraper is rotatably connected to the scraper bracket, and the scraper drive is used to drive the scraper to rotate between the corner position and the avoidance position.

3. The corner-cutting mechanism as described in claim 2, characterized in that: The scraper includes a connecting part and a corner-cleaning part. The connecting part is rotatably connected to the scraper bracket. The scraper driving member is used to drive the connecting part to rotate relative to the scraper bracket. The corner-cleaning part is rotatably connected to the end of the connecting part away from the scraper bracket, and an elastic member is provided between the corner-cleaning part and the connecting part.

4. The corner-cutting mechanism as described in claim 3, characterized in that: The scraper bracket is provided with a rotating hole, and the connecting part is rotatably engaged with the rotating hole. The scraper drive component includes a scraper cylinder and a push rod. An extension is provided on the connecting part along a direction perpendicular to the axis of the rotating hole. The scraper cylinder is connected to the scraper bracket. One end of the push rod is connected to the output end of the scraper cylinder, and the end away from the scraper cylinder is connected to the extension.

5. The corner-cutting mechanism as described in claim 1, characterized in that: The corner cutting assembly includes a cutter, a cutter bracket, and a cutter drive. The cutter drive is connected to the cutter bracket, and the cutter is connected to the cutter drive. The cutter drive is used to drive the cutter to heat-cut and seal the straightened corners of the packaging bag.

6. The corner-cutting mechanism as described in claim 1, characterized in that: The corner trimming and chopping mechanism also includes a base and four mounting bases. All four mounting bases are slidably connected to the base, and the abutment, the scraper assembly, and the corner trimming assembly are all connected to the mounting bases.

7. The corner-cutting mechanism as described in claim 6, characterized in that: The base includes a first base plate and a second base plate. There are two second base plates, and both second base plates are slidably connected to the first base plate along a first direction. The four mounting seats are divided into two groups, with two mounting seats in each group. The two groups of mounting seats are respectively arranged on opposite sides of the second base plate along a second direction. In each group, one or two mounting seats are slidably connected to the second base plate.

8. The corner-cutting mechanism as described in claim 7, characterized in that: The base also includes a first driving component and a second driving component; Two first guide rails are provided on the first base plate along the first direction, and two first sliders are provided on the two second base plates. The two first guide rails slide in cooperation with the first sliders on the two second base plates respectively. The first driving component includes a first driving motor, a first driving wheel, a first driven wheel, and a first synchronous belt. The output end of the first driving motor is connected to the first driving wheel. The first synchronous belt is sleeved on the first driving wheel and the first driven wheel to form a belt drive. Each of the two second base plates is provided with a first connecting block, and the first connecting block is connected to the opposite sides of the first synchronous belt. A second guide rail is provided on the side of the second base plate away from the first base plate. A second slider is provided on one or two of the mounting seats in each group. The second slider slides in cooperation with the second guide rail along the second direction. The second driving component includes a second driving motor, a second driving wheel, a second driven wheel, and a second synchronous belt. The output end of the second driving motor is connected to the second driving wheel. The second synchronous belt is sleeved on the second driving wheel and the second driven wheel to form a belt drive. A second connecting block is provided on one or two of the mounting seats in each group. The second connecting block is connected to the second synchronous belt.

9. The method for aligning and cutting corners as described in claim 1, characterized in that, include: Secure the opposite sides of the packaging box with a backing plate; Rotate the scraper assembly from the clearance position to the corner straightening position to straighten the corners of the packaging bag and cooperate with the backing plate to clamp the corners while applying a tension force along the straightening direction to the corners; The corner cutting component heat-cuts and seals the straightened corners of the packaging bag.

10. A packaging machine, characterized in that: The device includes a corner trimming and cutting mechanism, a feeding mechanism, and a picking mechanism as described in any one of claims 1-8. The feeding mechanism is used to place the packaging box into the corner trimming and cutting mechanism, the corner trimming and cutting mechanism is used to straighten the corners of the packaging bag on the packaging box and heat-seal them, and the picking mechanism is used to remove the packaged box after the corners have been cut.

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