CN220785041U - Bending forming mechanism of carton - Google Patents

Abstract

The utility model relates to a bending forming mechanism of a paper box, wherein a mounting plate is arranged on the top end surface of a base, a hydraulic rod is embedded in the central position of the top end surface of the mounting plate, the bottom end of the hydraulic rod penetrates through the mounting plate to be fixedly connected with a mounting frame, a bending barrel is rotatably arranged in the mounting frame, the outer wall of the bending barrel is fixedly connected with a plurality of bending frames, bending blocks are arranged at the tops of the bending frames, heating cavities are arranged on the inner sides of the bending blocks, heaters are arranged in the heating cavities, support plates are arranged on the left side and the right side of the bending table, steam mechanisms are arranged between the two support plates, a through hole is formed in the middle of the inner sides of the support plates, a steam spray pipe is fixed in the through hole and penetrates through the support plates to be communicated with a steam box, and a steam inlet pipe is arranged at the bottom of the steam box; before bending at the bending position, steam is sprayed out from the steam spray pipe to the bending position of the paperboard, and the bending block matched with heating is heated in the bending process, so that the bending position of the paperboard is rapidly shaped, and the bending efficiency and the bending quality of the paperboard are improved.

Description

Bending forming mechanism of carton

Technical Field

The utility model relates to a bending forming mechanism, in particular to a bending forming mechanism for a carton.

Background

Cardboard is made into a carton through die cutting, indentation, nailing or sticking, the carton is a packaging product with the widest application, the carton is made of the cardboard, and the cardboard needs to be bent when the carton is formed.

At present, bending devices special for paperboards are lacking in the market, and in most cases, a manual bending mode is adopted, however, manual bending is more labor-consuming, and when a worker bends for a long time, the wrist can be sour, so that bending efficiency can be affected, and even the paperboards can be injured; part mill probably adopts the device of buckling to the cardboard to reach the purpose of using manpower sparingly cost, but the device of buckling does not possess regulatory function, only can go on to the cardboard of a size, and what is in addition can not heat the position of bending when bending, so after bending the cardboard, because the cardboard has not yet finalized the design completely, so the cardboard still has certain resilience, leads to bending the shaping effect of back carton not good.

Disclosure of Invention

Aiming at the defects of the problems, the utility model provides a bending and forming mechanism of a carton.

The utility model realizes the above purpose through the following technical scheme: the utility model provides a forming mechanism that bends of carton, includes the base and sets up the platform of bending in the base top, the equal fixedly connected with bracing piece in base terminal surface four corners department, four be provided with the mounting panel between the top of bracing piece, the top face central point department of bending the platform transversely sets up the groove of bending, be provided with the mechanism of bending in the groove of bending, the top face central point department of mounting panel inserts and installs the hydraulic stem, the bottom of hydraulic stem passes mounting panel fixedly connected with and is the mounting bracket of U style of calligraphy, rotate in the mounting bracket and be provided with a section of thick bamboo of bending, and a side of mounting bracket installs the drive a section of thick bamboo pivoted first motor of bending, the outer wall of a section of thick bamboo of bending is a plurality of frame of bending, the piece of bending is all installed at the top of frame of bending, the longitudinal section of piece is triangle-shaped structure, the piece inboard is provided with the heating chamber, heating chamber internally mounted has the heater, the platform rear side of bending is provided with conveying mechanism, the platform top side of bending is provided with transport mechanism, the platform left and right sides all is provided with the backup pad, two backup pads are provided with two backup pads, two backup pads are provided with the steam box and two and are provided with the steam jet tube, the steam jet pipe is fixed in the side, the steam jet pipe is in the steam box is fixed with the steam box, the steam pipe is fixed in the middle of the steam pipe, the steam pipe is connected with the steam pipe.

Preferably, the steam nozzle and the bending groove are arranged on the same longitudinal section.

Preferably, the conveying mechanism comprises a conveying support plate, a rotating shaft and a second motor, wherein the conveying support plate is provided with a bending table at the rear side, the bottom of the conveying support plate is fixedly connected with a base, two rotating shafts are arranged between the conveying support plates, one side of the support plate, which is opposite to the rotating shaft, is fixedly connected with the two second motors, the output ends of the two second motors are respectively fixedly connected with the two rotating shafts, and one end, which is far away from the second motor, of each rotating shaft is rotationally connected with the other support plate.

Preferably, the conveying mechanism comprises a conveying belt and a conveying block, a driving groove is transversely formed in the front side of the top end of the bending table, the conveying belt is arranged in the driving groove, the outer wall of the conveying belt is in rectangular array bonding with the conveying block, and a third motor for driving the conveying belt to rotate is arranged on one side face of the bending table.

Preferably, the folding mechanism comprises a left U-shaped support and a right U-shaped support, a chute is formed in the center of the upper end of the folding groove, the left U-shaped support and the right U-shaped support are arranged at the left end and the right end of the folding groove, a left supporting plate is arranged on the left U-shaped support through a left rotating shaft, and a right supporting plate is arranged on the right U-shaped support through a right rotating shaft.

Preferably, the sliding groove is internally provided with a sliding column, the sliding groove at the bottom of the sliding column is internally provided with a first spring, the top of the sliding column is provided with an H-shaped connector, a second spring is connected between the bottom surface of the left supporting plate and the top surface of the bending groove, and a third spring is connected between the bottom surface of the right supporting plate and the top surface of the bending groove.

Preferably, the H-shaped connector both ends are provided with left recess and right recess respectively, left layer board right-hand member passes through left bull stick setting inside the left recess, left side recess is spacing about to left bull stick, left bull stick slides in left inside left right side of recess, right layer board passes through right bull stick setting inside the right recess, right side recess is spacing about to right bull stick, right bull stick slides in right inside left right side of recess.

Preferably, the limiting mechanism comprises a telescopic rod and a baffle plate, wherein the front side and the rear side of the supporting plate are fixedly connected with the telescopic rod, and the output end of the telescopic rod is fixedly connected with the baffle plate.

Preferably, a rotating shaft is fixedly inserted in the central position of the bending cylinder, both ends of the rotating shaft are inserted into the inner wall of the mounting frame and are rotationally connected with the mounting frame through bearings, and one end of the rotating shaft penetrates through the mounting frame and is fixedly connected with the output shaft of the first motor.

The beneficial effects of the utility model are as follows:

1. through setting up the inside of bending the piece and setting up the heating chamber to the internally mounted in heating chamber has the heater, thereby when bending the piece and bending the carton, the heater starts, will bend the piece and heat the position of bending of carton, thereby make the shaping of the part of bending of carton better, before bending the position and bending through the steam mechanism that sets up, one end with the steam admission pipe inserts in the steam box, and adjust the ejection volume of steam, final steam is from steam spray pipe blowout to the department of buckling of cardboard, a small amount of steam makes the cardboard bend the department moist, the cardboard of moist has elasticity more to bend more easily, make the shaping of bending of cardboard more quick reliable, the bending department that the cooperation heating makes the cardboard by the drying of bending in-process can also prevent the fold that produces, make the shape of cardboard rapid prototyping after the hem is accomplished for follow-up this limit process provides the assistance, promote its efficiency of bending and the quality of bending.

2. Through conveying mechanism and the transport mechanism that sets up, conveying mechanism can carry the cardboard to bending the platform top and bend, and the cardboard after bending then conveys out through transport mechanism's conveyer belt, need not the manual work to add and take out the cardboard, has promoted the portability of operation.

3. The folding mechanism is arranged on the left supporting plate and the right supporting plate, when the bending block above presses the H-shaped connector downwards, the left supporting plate and the right supporting plate press and support the paper plate, after bending is finished, the pressure on the H-shaped connector disappears, the first spring, the second spring and the third spring reset, the second spring and the third spring respectively enable the left supporting plate and the right supporting plate to reset quickly, the third spring ejects the sliding column, the folded paper plate is directly ejected by the left supporting plate and the right supporting plate, the processing efficiency is improved, the three springs can also play a role of buffering the folding block to generate pressure on the folding mechanism, and the opening and closing angles of the left supporting plate and the right supporting plate are different in size through the left rotating shaft, the right rotating shaft, the left rotating rod and the right rotating rod which are arranged to adapt to different folding angles.

4. Through the stop gear baffle that sets up can be with the cardboard of needing bending effectively and just, the cardboard of equidimension not is adaptable to the cardboard of equidimension not through the distance between the length control baffle of adjusting the telescopic link.

5. The bending barrel is arranged in the mounting frame in a rotating mode, a plurality of bending frames and bending plates with different angles are arranged on the bending barrel, the first motor on one side of the mounting frame drives the bending barrel to rotate through the rotating shaft, the bending plates with different angles on the bending barrel can be used for bending, and therefore bending processing of various different requirements is applicable, and applicability is improved.

Drawings

FIG. 1 is a schematic view of a bending station according to the present utility model;

FIG. 2 is a schematic structural view of a bending mechanism according to the present utility model;

FIG. 3 is a right side view of the mounting bracket of the present utility model;

FIG. 4 is a schematic view of the folding mechanism of the present utility model;

fig. 5 is a perspective view showing the connection of the connector and the bending groove according to the present utility model.

In the figure: 1. a base; 2. a bending table; 3. a bending groove; 31. a folding mechanism; 311. a left U-shaped support; 3111. a left rotating shaft; 3112. a left supporting plate; 3113. a second spring; 312. a right U-shaped support; 3121. a right rotating shaft; 3122. a right supporting plate; 3123. a third spring; 32. a chute; 321. a spool; 322. a first spring; 33. a connector; 331. a left groove; 332. a right groove; 333. a left rotating rod; 334. a right rotating rod; 4. a support rod; 41. a mounting plate; 42. a hydraulic rod; 5. a mounting frame; 6. a bending cylinder; 61. a bending frame; 62. bending blocks; 63. a heater; 7. a first motor; 8. a conveying mechanism; 81. a conveying support plate; 82. a rotating shaft; 9. a conveying mechanism; 91. a conveyor belt; 92. a transfer block; 93. a third motor; 10. a support plate; 11. a limiting mechanism; 111. a telescopic rod; 112. a baffle; 12. a steam nozzle; 13. a steam box; 14. steam enters the pipe.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1, 2 and 3, a bending forming mechanism of a paper box comprises a base 1 and a bending table 2 arranged above the base 1, wherein supporting rods 4 are fixedly connected to four corners of the top end surface of the base 1, a mounting plate 41 is arranged between the tops of the four supporting rods 4, a bending groove 3 is transversely formed in the central position of the top end surface of the bending table 2, a bending mechanism 31 is arranged in the bending groove 3, a hydraulic rod 42 is arranged in the central position of the top end surface of the mounting plate 41 in an embedded manner, the bottom end of the hydraulic rod 42 penetrates through the mounting plate 41 and is fixedly connected with a U-shaped mounting frame 5, a bending cylinder 6 is rotatably arranged in the mounting frame 5, a first motor 7 for driving the bending cylinder 6 to rotate is arranged on one side surface of the mounting frame 5, a plurality of bending frames 61 are transversely fixedly connected to the outer wall of the bending cylinder 6 in an annular array, bending blocks 62 are arranged at the tops of the bending frames 61, the longitudinal section of the bending block 62 is in a triangular structure, a heating cavity is arranged on the inner side of the bending block 62, a heater 63 is arranged in the heating cavity, a conveying mechanism 8 is arranged on the rear side of the bending table 2, a conveying mechanism 9 is arranged on the front side of the top end of the bending table 2, supporting plates 10 are arranged on the left side and the right side of the bending table 2, limiting mechanisms 11 are arranged on the front side and the rear side of the two supporting plates 10, a steam mechanism is arranged between the two supporting plates 10 and comprises a steam spray pipe 12 and a steam box 13, the steam box 13 is fixed on the outer side surface of the supporting plate 10, a through hole is arranged in the middle of the inner side of the supporting plate 10, the steam spray pipe 12 is fixed in the through hole, the steam spray pipe 12 penetrates through the supporting plate 10 and is communicated with the steam box 13, a steam inlet pipe 14 is arranged at the bottom of the steam box 13, the steam spray pipe 12 and the bending groove 3 are arranged on the same longitudinal section, a rotating shaft is fixedly inserted in the central position of the bending cylinder 6, both ends of the rotating shaft are inserted into the inner wall of the mounting frame 5 and are rotationally connected with the mounting frame 5 through bearings, and one end of the rotating shaft penetrates through the mounting frame 5 and is fixedly connected with the output shaft of the first motor 7. Adopt this structure, before bending the department of buckling again, in the one end access steam box 13 of pipe 14 is advanced to the ejection volume of adjusting the steam, finally steam is from the department of buckling of steam spray tube 12 blowout to cardboard, a small amount of steam makes cardboard department of buckling moisture, the cardboard of buckling of moist has elasticity more to bend more easily, make the shaping of buckling of cardboard more quick reliable, when bending piece 62 bends the carton, heater 63 starts, will bend piece 62 and heat the position of bending of carton, thereby the bight shaping of portion of buckling of letting the carton is better, the piece 62 of bending of heating is heated in the process of bending and is made the department of bending of cardboard by the drying can also prevent the fold that produces in the process of bending, make the shape of cardboard after the hem accomplish provide assistance for this limit process of follow-up, promote its bending efficiency and the quality of bending, through the rotatory section of thick bamboo 6 of bending that is provided with a plurality of bending frame 61 and different angles on the section of thick bamboo 6 of bending, the first motor 7 of mounting bracket 5 one side is through driving section of thick bamboo 6 rotation of bending, can use bending piece 6 bending, the section of thick bamboo 6 bending of different angles is different angle of board bending, thereby the suitability has been improved the different demands of bending.

As shown in fig. 1, the conveying mechanism 8 includes a conveying support plate 81, a rotating shaft 82 and a second motor, the conveying support plate 81 is provided with a bending table 2 at the rear side, the bottom of the conveying support plate 81 is fixedly connected with a base 1, two rotating shafts 82 are arranged between the two conveying support plates 81, one side of one support plate 81 opposite to the rotating shaft 82 is fixedly connected with two second motors, the output ends of the two second motors are respectively fixedly connected with the two rotating shafts 82, one end of the two rotating shafts 82 far away from the second motor is rotatably connected with the other support plate 81, the conveying mechanism 9 includes a conveying belt 91 and a conveying block 92, a driving groove is transversely formed in the front side of the top end of the bending table 2, the conveying belt 91 is arranged in the driving groove, the outer wall of the conveying belt 91 is a rectangular array bonding conveying block 92, and a third motor 93 for driving the conveying belt 92 to rotate is arranged at one side of the bending table 2. By adopting the structure, the conveying mechanism 8 can convey the paperboards to the upper part of the bending table 2 for bending, the bent paperboards are conveyed out through the conveying belt 91 of the conveying mechanism 9, manual addition and removal of the paperboards are not needed, the portability of operation is improved, and the two rotating shafts 82 can flatten the paperboards in advance and facilitate subsequent bending.

As shown in fig. 1, 4 and 5, the folding mechanism 31 includes a left U-shaped support 311 and a right U-shaped support 312, a chute 32 is formed at the center of the upper end of the bending groove 3, the left U-shaped support 311 and the right U-shaped support 312 are disposed at the left and right ends of the bending groove 3, a left support plate 3112 is disposed on the left U-shaped support 311 through a left rotating shaft 3111, and a right support plate 3122 is disposed on the right U-shaped support 312 through a right rotating shaft 3121. The sliding groove 32 is internally provided with a sliding post 321, the sliding groove at the bottom of the sliding post 321 is internally provided with a first spring 322, the top of the sliding post 321 is provided with an H-shaped connector 33, a second spring 3113 is connected between the bottom surface of the left supporting plate 3112 and the top surface of the bending groove 3, and a third spring 3123 is connected between the bottom surface of the right supporting plate 3122 and the top surface of the bending groove 3. The H type connector 33 both ends are provided with left recess 331 and right recess 332 respectively, and left layer board 3112 right-hand member passes through left bull stick 333 to be set up inside left recess 331, and left bull stick 333 is spacing from top to bottom to left bull stick 333, and left bull stick 333 slides left to right in left recess 331 inside, and right layer board 3122 passes through right bull stick 334 to be set up inside right recess 332, and right recess 332 carries out spacing from top to bottom to right bull stick 334, and right bull stick 334 slides left to right in right recess 332 inside. With this structure, when the paper board is placed on the left support plate 3112 and the right support plate 3122, and bending is started, the upper bending block 62 presses the H-shaped connector 33 downward, the left support plate 3112 and the right support plate 3122 press and support the paper board, after bending is completed, the pressure on the H-shaped connector 33 disappears, the first spring 322, the second spring 3113 and the third spring 3123 reset, the second spring 3113 and the third spring 3123 respectively enable the left support plate 3112 and the right support plate 3122 to reset quickly, the first spring 322 ejects the slide post 321, the folded paper board is directly ejected by the left support plate and the right support plate, the processing efficiency is improved, the three springs can also play a role of buffering the bending block 62 to press the folding mechanism, and the left rotating shaft 3111, the right rotating shaft 3121, the left rotating rod 333 and the right rotating rod 334 enable the opening and closing angles of the left support plate to be different to adapt to different bending angles.

As shown in fig. 1, the limiting mechanism 11 includes a telescopic rod 111 and a baffle 112, the front and rear sides of the two support plates 10 are fixedly connected with the telescopic rod 111, and the output ends of the telescopic rods 111 are fixedly connected with the baffle 112. By adopting the structure, the baffle 112 can effectively align the paperboards needing to be bent, and the paperboards with different sizes can be adapted to the paperboards with different sizes by adjusting the length of the telescopic rod 111 to control the distance between the baffle 112.

When the bending forming mechanism is used, the second motor is started so as to drive the rotating shafts 82 to rotate, a paperboard needing to be bent is placed between the two rotating shafts 82, the rotating shafts 82 drive the paperboard to be bent to the position above the bending table 2, when the position needing to be bent reaches the position right above the bending groove 3, the second motor is stopped, the telescopic rod 111 is driven to drive the baffle 112, the baffle 112 is enabled to be aligned and limited to the paperboard, the bending cylinder 6 is rotationally arranged through the mounting frame 5, a plurality of bending frames 61 and bending plates 62 with different angles are arranged on the bending cylinder 6, the first motor 7 on one side of the mounting frame 5 is started to drive the bending cylinder 6 to rotate through the rotating shafts until the required bending block 62 is positioned right above the bending groove 3, one end of the steam inlet pipe 14 is connected into the steam box 13, the steam spraying amount is regulated, the steam nozzle 12 is started, and the steam is sprayed from the steam spraying pipe 12 to the bending position of the paperboard, the bending part of the paper board is moist due to a small amount of steam, the heater 63 is started, the bending block 62 is heated, the hydraulic rod 42 is started, the bending block 62 descends to start bending, the bending block 62 heats the bending part of the paper box, the bending part of the paper box is better molded, the heated bending block 62 heats the bending part of the paper board in the bending process, the bending part of the paper board is dried, folds generated in the bending process can be prevented, when the bending block 62 descends to start bending, the left supporting plate 3112 performs clockwise circular motion by taking the left rotating shaft 3111 as a center, the right supporting plate 3122 performs anticlockwise circular motion by taking the right rotating shaft 3121 as a center, the left rotating rod 333 drives the left supporting plate 3112 and the right rotating rod 334 to drive the right supporting plate 3122 to control the distance between the two supporting plates so as to be suitable for supporting only plates, the left supporting plate 3112 and the right supporting plate 3122 perform the bending operation on the paper board, after bending, the pressure on the H-shaped connector 33 disappears, the first spring 322, the second spring 3113 and the third spring 3123 are reset, the second spring 3113 and the third spring 3123 respectively enable the left support plate 3112 and the right support plate 3122 to reset rapidly, the first spring 322 ejects the sliding post 321, the folded paper board is directly ejected by the left support plate and the right support plate, the third motor 93 is started, and the conveyor belt 91 is driven to start conveying the folded paper board to the following procedure.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (9)

1. The utility model provides a forming mechanism bends of carton, includes base (1) and sets up bending table (2) in base (1) top, equal fixedly connected with bracing piece (4) in base (1) top face four corners department, four be provided with mounting panel (41), its characterized in that between the top of bracing piece (4): the bending machine is characterized in that a bending groove (3) is transversely formed in the center position of the top end face of the bending table (2), a bending mechanism (31) is arranged in the bending groove (3), a hydraulic rod (42) is embedded and installed in the center position of the top end face of the mounting plate (41), the bottom end of the hydraulic rod (42) penetrates through the mounting plate (41) to be fixedly connected with a U-shaped mounting frame (5), a bending cylinder (6) is rotationally arranged in the mounting frame (5), a first motor (7) for driving the bending cylinder (6) to rotate is installed on one side face of the mounting frame (5), a plurality of bending frames (61) are transversely fixedly connected to the outer wall of the bending cylinder (6) in an annular array, bending blocks (62) are arranged at the top of each bending frame (61), the longitudinal sections of the bending blocks (62) are of triangular structures, heating cavities are arranged on the inner sides of the bending blocks (62), heaters (63) are arranged in the heating cavities, conveying mechanisms (8) are arranged on the rear sides of the bending tables (2), conveying mechanisms (9) are arranged on the front sides of the top ends of the bending tables (2), supporting plates (10) are arranged on the left side and the right side of the bending tables (2), limiting mechanisms (11) are arranged on the front side and the rear side of each supporting plate (10), steam mechanisms are arranged between the two supporting plates (10), the steam mechanism comprises a steam spray pipe (12) and a steam box (13), the steam box (13) is fixed on the outer side face of the supporting plate (10), a through hole is formed in the middle of the inner side of the supporting plate (10), the steam spray pipe (12) is fixed in the through hole, the steam spray pipe (12) penetrates through the supporting plate (10) and is communicated with the steam box (13), and a steam inlet pipe (14) is arranged at the bottom of the steam box (13).

2. The fold forming mechanism for a carton of claim 1, wherein: the steam spray pipe (12) and the bending groove (3) are arranged on the same longitudinal section.

3. The fold forming mechanism for a carton of claim 1, wherein: conveying mechanism (8) are including carrying backup pad (81), axis of rotation (82) and second motor, carry backup pad (81) to be provided with bend the platform rear side, the bottom of carrying backup pad (81) and base (1) fixed connection, two be equipped with two between carrying backup pad (81) axis of rotation (82), one of them carry backup pad (81) one side fixedly connected with two of axis of rotation (82) second motor, two the output of second motor respectively with two axis of rotation (82) fixed connection, two the one end that second motor was kept away from to axis of rotation (82) all rotates with another carrying backup pad (81) to be connected.

4. A bending forming mechanism for a carton as claimed in claim 3, wherein: the conveying mechanism (9) comprises a conveying belt (91) and a conveying block (92), a driving groove is transversely formed in the front side of the top end of the bending table (2), the conveying belt (91) is arranged in the driving groove, the outer wall of the conveying belt (91) is adhered to the conveying block (92) in a rectangular array, and a third motor (93) for driving the conveying belt (91) to rotate is arranged on one side face of the bending table (2).

5. The fold forming mechanism for a carton of claim 1, wherein: the folding mechanism (31) comprises a left U-shaped support (311) and a right U-shaped support (312), a chute (32) is formed in the center of the upper end of the bending groove (3), the left U-shaped support (311) and the right U-shaped support (312) are arranged at the left end and the right end in the bending groove (3), a left supporting plate (3112) is arranged on the left U-shaped support (311) through a left rotating shaft (3111), and a right supporting plate (3122) is arranged on the right U-shaped support (312) through a right rotating shaft (3121).

6. The fold forming mechanism for a carton as claimed in claim 5, wherein: the novel sliding seat is characterized in that a sliding column (321) is arranged inside the sliding groove (32), a first spring (322) is arranged inside the sliding groove (32) at the bottom of the sliding column (321), an H-shaped connector (33) is arranged at the top of the sliding column (321), a second spring (3113) is connected between the bottom surface of the left supporting plate (3112) and the top surface of the bending groove (3), and a third spring (3123) is connected between the bottom surface of the right supporting plate (3122) and the top surface of the bending groove (3).

7. The fold forming mechanism for a carton as claimed in claim 6, wherein: h type connector (33) both ends are provided with left recess (331) and right recess (332) respectively, left side layer board (3112) right-hand member is inside left recess (331) through left bull stick (333), left side recess (331) are spacing about going on left bull stick (333), left bull stick (333) are inside left and right sliding in left recess (331), right layer board (3122) are inside right recess (332) through right bull stick (334) setting, right recess (332) are spacing about going on right bull stick (334), right bull stick (334) are inside left and right sliding in right recess (332).

8. The fold forming mechanism for a carton of claim 1, wherein: the limiting mechanism (11) comprises a telescopic rod (111) and a baffle plate (112), wherein the front side and the rear side of the supporting plate (10) are fixedly connected with the telescopic rod (111), and the output end of the telescopic rod (111) is fixedly connected with the baffle plate (112).

9. The fold forming mechanism for a carton of claim 1, wherein: the center position of the bending cylinder (6) is fixedly inserted with a rotating shaft, both ends of the rotating shaft are inserted into the inner wall of the mounting frame (5), the rotating shaft is rotatably connected with the mounting frame (5) through a bearing, and one end of the rotating shaft penetrates through the mounting frame (5) and is fixedly connected with the output shaft of the first motor (7).