A bottom folding and turning-up device for a paper cover machine

Abstract

The utility model relates to a kind of bottom folding and edge rolling device for paper cover machine, including rack and index turntable being rotationally arranged on rack, there are evenly distributed several recesses for paper cover to be placed in processing on index turntable, upper die and lower die for processing and shaping paper cover are respectively arranged on the upper end and lower end of rack, recess includes the forming groove for upper die and lower die to form edge of paper cover, avoiding recess is provided in the upper end of forming groove, to avoid upper die contact forming groove side wall, lower die head and the lower lifting plate capable of lifting are included in lower die, lower connecting rod is connected between lower die head and lifting plate, elastic member is sleeved in lower connecting rod, one end of elastic member is connected with lower die head, and the other end is connected with lower lifting plate, to avoid the problem that paper is jammed in the production of upper die and lower die in prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of paper cover processing equipment, specifically to a folding and rolling device for a paper cover machine. Background Technology

[0002] The bottom folding and edge rolling device for paper cap machines is an automated mechanical component integrated into paper cap forming equipment. It is primarily used for the bottom folding and edge rolling forming process of paper containers. Its core function is to precisely fold the cut paper blanks into the shape of the container bottom through a preset mechanical structure and program control, while simultaneously completing the edge rolling process to enhance the container's sealing, load-bearing capacity, and structural stability. This device typically consists of a feeding mechanism, a bottom folding mold assembly, an edge rolling roller assembly, and a transmission system. During operation, a servo motor drives multiple sets of cam linkage mechanisms to automatically adjust the folding angle and edge rolling diameter, adapting to the production needs of paper containers with diameters ranging from 50 to 300 mm.

[0003] CN216100716U discloses a folding and rolling device for a paper cap machine. The key technical features include a frame, an indexing turntable, and a rotation drive assembly. Several concave dies are evenly distributed on the indexing turntable. An upper oiler and a lower oiler are installed on the frame at the oiling station, with their oiling ends facing the concave dies. An edge-rolling die and a bottom-recessing die are installed on the frame at the folding and rolling station, corresponding to the concave dies on the indexing turntable at the folding and rolling station. An upper shaping die and a lower shaping die are installed on the frame at the shaping station. The shaping die is set in correspondence with the die at the shaping station on the indexing turntable; the upper first mounting plate and the lower first mounting plate are slidably connected on the frame, and the frame is equipped with a lifting drive component that can drive the upper first mounting plate and the lower first mounting plate to move closer or further apart. However, in this technology, the upper and lower shaping dies will have mechanical contact with the die during processing. The excessively long contact stroke between the upper and lower shaping dies and the die greatly increases the probability of paper jams during paper cover processing. At the same time, when the lower shaping die jams, the contact surface between the lower shaping die and the paper cover will not be able to return to its original position. Therefore, this technology still has some room for improvement. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a folding and rolling device for a paper cover machine, which addresses the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a folding and rolling device for a paper cover machine, comprising a frame and an indexing turntable rotatably mounted on the frame. The indexing turntable has a plurality of concave dies evenly distributed on it for placing paper covers. The upper and lower ends of the frame are respectively provided with an upper die and a lower die for forming the paper covers. The concave die includes a forming groove for the upper and lower dies to roll the paper cover. An avoidance groove is provided at the upper end of the forming groove to prevent the upper die from contacting the side wall of the forming groove. The lower die includes a lower die head and a lower lifting plate that can be raised and lowered. The lower die head and the lower lifting plate are connected by a lower connecting rod. An elastic element is sleeved on the lower connecting rod, with one end connected to the lower die head and the other end connected to the lower lifting plate.

[0006] By adopting the above technical solution, an avoidance groove is opened at the upper end of the die forming groove, which can effectively avoid contact interference between the upper die and the side wall of the forming groove, shorten the mechanical contact stroke, and cause the upper die and paper cover to jam due to the processing stroke. At the same time, the lower die head and the lifting plate are connected by a lower connecting rod. One end of the elastic element is connected to the lower die head and the other end is connected to the lower lifting plate. When a paper jam occurs, the lower lifting plate returns to its original position, and the elastic element drives the lower die head to return to its original position, thus avoiding the paper jam problem that occurs during the production of the upper and lower die in the existing technology.

[0007] The aforementioned paper cap machine folding and rolling device can be further configured as follows: a plurality of first telescopic rods are provided between the machine frame and the indexing turntable; the first telescopic rods are fixedly connected to the lower lifting plate; the lower connecting rod passes through the lower lifting plate; a sleeve is provided between the lower lifting plate and the lower connecting rod for the lower connecting rod to be sleeved; the lower connecting rod is placed inside the sleeve; and the end of the elastic element away from the lower die head is connected to the sleeve.

[0008] Using the above technical solution, the first telescopic rod is fixedly connected to the lower lifting plate. By setting a sleeve between the lower lifting plate and the lower connecting rod, and connecting the elastic element to the sleeve, the direct friction between the lower connecting rod and the lower lifting plate is reduced, and the service life of the components is extended.

[0009] The aforementioned paper cover machine folding and rolling device can be further configured as follows: the upper pressure mold includes an upper lifting plate placed above the indexing turntable, the upper lifting plate is provided with a plurality of upper connecting rods, the upper connecting rods are provided with an upper die head facing the end of the indexing turntable, the upper die head is placed above the concave die, the top of the upper lifting plate is provided with a plurality of second telescopic rods, the frame is provided above the upper lifting plate with a first driving structure for driving the second telescopic rods to extend and retract, and the bottom of the frame is provided with a second driving structure for driving the first telescopic rods to extend and retract.

[0010] By adopting the above technical solution, the upper lifting plate is driven to move up and down by setting a second telescopic rod and a first driving structure, and the lower lifting plate is controlled by the first telescopic rod and the second driving structure to complete the processing of the paper cover.

[0011] The aforementioned paper cover folding and rolling device for a paper cover machine can be further configured as follows: the first driving structure includes a first mounting plate placed above an upper lifting plate; the top of the first mounting plate is provided with a rotatable swing arm; one end of the swing arm passes through the first mounting plate and is provided with a connecting arm; the connecting arm is fixedly connected to the upper lifting plate; the other end of the swing arm is provided with a third telescopic rod capable of retracting and driving the swing arm to swing back and forth; the third telescopic rod passes through the frame; the top of the frame is provided with a fourth telescopic rod connected to an external driving source on one side of the third telescopic rod; the fourth telescopic rod passes through the frame and is provided with a first connecting member connected to the third telescopic rod at its end.

[0012] By adopting the above technical solution, the linear driving force of the third telescopic rod is converted into the lifting motion of the upper lifting plate through the lever of the swing rod and the connecting arm. The external drive source drives the third telescopic rod through the fourth telescopic rod, which can effectively isolate vibration interference in the power transmission process and improve the swing accuracy of the swing rod.

[0013] The aforementioned paper cover machine folding and rolling device can be further configured as follows: the second drive structure includes a second mounting plate disposed at the bottom of the first telescopic rod, the second mounting plate is hinged to a second connector, the end of the second connector is hinged to a hinge arm, the bottom of the frame is fixedly mounted with a hinge seat, the hinge seat is hinged to the end of the hinge arm away from the second connector, and the middle of the hinge arm is provided with a connection end for connection with an external drive.

[0014] By adopting the above technical solution, the power of the external drive source is converted into the smooth lifting and lowering motion of the second mounting plate through the four-bar transmission mechanism composed of the hinge seat, hinge arm and the second connecting member. This, together with the first telescopic rod, realizes the displacement of the lower pressing mold, effectively reducing the impact load in the traditional rigid transmission and reducing component wear. At the same time, the design of the hinge structure allows for small angle compensation during the transmission process, avoiding jamming problems caused by installation errors or thermal expansion and contraction.

[0015] The aforementioned paper cover machine folding and rolling device can be further configured as follows: the top of the frame is provided with a lower shaping mold that can be lifted and lowered, the lower shaping mold is placed at the bottom of the indexing turntable, and both ends of the upper lifting plate are provided with upper shaping molds corresponding to the lower shaping mold.

[0016] By adopting the above technical solution, a lower shaping mold that can be raised and lowered is set at the top of the frame, and a corresponding upper shaping mold is set at both ends of the upper lifting plate to form a coordinated shaping. This allows for secondary shaping immediately after the paper cover is folded and rolled, effectively eliminating internal stress in the material and preventing dimensional deviations caused by springback of the paper cover after forming.

[0017] The beneficial effects of this utility model are as follows: By opening an avoidance groove at the upper end of the die forming groove, the contact interference between the upper die and the side wall of the forming groove can be effectively avoided, the mechanical contact stroke is shortened, and the lower lifting plate returns to its original position while the lower die head is driven to return to its original position through the elastic element, thus avoiding the paper jam problem that occurs during the production of the upper and lower die in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the concave die structure of this utility model; Figure 3 This is a schematic diagram of the lower pressure mold structure of this utility model; Figure 4 This is a schematic diagram of the upper pressure mold structure of this utility model; Label annotations: 1-Frame, 2-Indexing turntable, 3-Die, 4-Upper die, 5-Lower die, 6-Forming groove, 7-Allowing groove, 8-Lower die head, 9-Lower lifting plate, 10-Lower connecting rod, 11-Elastic element, 12-First telescopic rod, 13-Sleeve component, 14-Upper lifting plate, 15-Upper connecting rod, 16-Upper die head, 17-Second telescopic rod, 18-First mounting plate, 19-Swing rod, 20-Connecting arm, 21-Third telescopic rod, 22-Fourth telescopic rod, 23-First connector, 24-Second mounting plate, 25-Second connector, 26-Hinged arm, 27-Hinged seat, 28-Connecting end, 29-Lower shaping die, 30-Upper shaping die. Detailed Implementation

[0019] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0020] like Figure 1-4The present invention provides the following technical solution: a folding and rolling device for a paper cap machine, comprising a frame 1 and an indexing turntable 2 rotatably mounted on the frame 1. The indexing turntable 2 has a plurality of die 3s evenly distributed on it for placing paper caps into the processing cavity. The upper and lower ends of the frame 1 are respectively provided with an upper die 4 and a lower die 5 for processing and shaping the paper caps. The die 3 includes a forming groove 6 for the upper die 4 and lower die 5 to roll the paper cap. The upper end of the forming groove 6 is provided with a feature to prevent the upper die 4 from contacting the forming process. The clearance groove 7 on the side wall of the groove 6, the lower die 5 includes a lower die head 8 and a lower lifting plate 9 that can be raised and lowered, the lower die head 8 and the lower lifting plate 9 are connected by a lower connecting rod 10, the lower connecting rod is fitted with an elastic element 11, one end of the elastic element 11 is connected to the lower die head 8 and the other end is connected to the lower lifting plate 9. The clearance groove 7 is opened at the upper end of the forming groove 6 of the die 3, which can effectively avoid contact interference between the upper die 4 and the side wall of the forming groove 6, shorten the mechanical contact stroke, and promote the contact between the upper die 4 and the paper cover due to the processing stroke. The process can cause paper jams. Simultaneously, the lower die head 8 is connected to the lifting plate via a lower connecting rod 10. One end of the elastic element 11 is connected to the lower die head 8, and the other end is connected to the lower lifting plate 9. When a paper jam occurs, the lower lifting plate 9 returns to its original position, and the elastic element 11 simultaneously drives the lower die head 8 to return to its original position, thus avoiding the paper jam problem that occurs during the production of the upper die 4 and lower die 5 in the prior art. Several first telescopic rods 12 are provided between the frame 1 and the indexing turntable 2. The first telescopic rods 12 are fixedly connected to the lower lifting plate 9. A connecting rod passes through the lower lifting plate 9. A sleeve 13 is provided between the lower lifting plate 9 and the lower connecting rod for the lower connecting rod to be fitted. The lower connecting rod is placed inside the sleeve 13. The end of the elastic member 11 away from the lower die head 8 is connected to the sleeve 13. The first telescopic rod 12 is fixedly connected to the lower lifting plate 9. By setting the sleeve 13 between the lower lifting plate 9 and the lower connecting rod, and connecting the elastic member 11 to the sleeve 13, the direct friction between the lower connecting rod and the lower lifting plate 9 is reduced, and the service life of the components is extended.

[0021] like Figure 1-4The present invention provides the following technical solution: a folding and rolling device for a paper cap machine, wherein the upper die head 16 includes an upper lifting plate 14 positioned above the indexing turntable 2, the upper lifting plate 14 is provided with a plurality of upper connecting rods 15, the upper connecting rods 15 are provided with the upper die head 16 facing the end of the indexing turntable 2, the upper die head 16 is positioned above the die cavity 3, the top of the upper lifting plate 14 is provided with a plurality of second telescopic rods 17, the frame 1 is provided above the upper lifting plate 14 and is provided with a first driving structure for driving the extension and retraction of the second telescopic rods 17, and the bottom of the frame 1 is provided with a second driving structure for driving the extension and retraction of the first telescopic rods 17. The first drive structure drives the upper lifting plate 14 to lift the upper die head 16, while the first telescopic rod 12 and the second drive structure control the movement of the lower lifting plate 9 to complete the processing of the paper cover. The first drive structure includes a first mounting plate 18 placed above the upper lifting plate 14. The top of the first mounting plate 18 is provided with a rotatable swing rod 19. One end of the swing rod 19 passes through the first mounting plate 18 and is provided with a connecting arm 20, which is fixedly connected to the upper lifting plate 14. The other end of the swing rod 19 is provided with a third telescopic rod 21 that can extend and retract to drive the swing rod 19 to swing back and forth. The third telescopic rod 21 passes through the frame 1, and the top of the frame 1... A fourth telescopic rod 22, connected to an external drive source, is located on one side of the third telescopic rod 21. The fourth telescopic rod 22 passes through the frame 1 and has a first connecting member 23 at its end connected to the third telescopic rod 21. Through the lever of the swing arm 19 and the connecting arm 20, the linear driving force of the third telescopic rod 21 is converted into the lifting motion of the upper lifting plate 14. The external drive source drives the third telescopic rod 21 through the fourth telescopic rod 22, effectively isolating vibration interference during power transmission and improving the swing accuracy of the swing arm 19. The second drive structure includes a second mounting plate 24 located at the bottom of the first telescopic rod 12. Mounting plate 24 is hinged to a second connector 25, and a hinge arm 26 is hinged to the end of the second connector 25. A hinge seat 27 is fixedly installed at the bottom of the frame 1. The hinge seat is hinged to the end of the hinge arm 26 away from the second connector 25. The middle part of the hinge arm 26 is provided with a connection end 28 for connection with an external drive. Through the four-bar transmission mechanism formed by the hinge seat 27, the hinge arm 26 and the second connector 25, the power of the external drive source is converted into the smooth lifting and lowering motion of the second mounting plate 24. This, together with the first telescopic rod 12, realizes the displacement of the lower die 5, effectively reducing the impact load in traditional rigid transmission and reducing component wear.Meanwhile, the hinged structure design allows for slight angle compensation during transmission, avoiding jamming problems caused by installation errors or thermal expansion and contraction. The top of the frame 1 is equipped with a liftable lower shaping mold 29, which is located at the bottom of the indexing turntable 2. Both ends of the upper lifting plate 14 are equipped with upper shaping molds 30 corresponding to the lower shaping mold 29. By setting a liftable lower shaping mold 29 at the top of the frame 1 and configuring corresponding upper shaping molds 30 at both ends of the upper lifting plate 14, a coordinated upper and lower shaping process is formed. This allows for secondary shaping immediately after the paper cover is folded and rolled, effectively eliminating internal material stress and preventing dimensional deviations caused by springback of the formed paper cover.

[0022] The beneficial effects of this utility model are as follows: By opening an avoidance groove 7 at the upper end of the forming groove 6 of the concave mold 3, the contact interference between the upper pressure mold 4 and the side wall of the forming groove 6 can be effectively avoided, the mechanical contact stroke is shortened, and the lower lifting plate 9 returns to its original position while the lower mold head 8 is driven to return to its original position through the elastic element 11, thus avoiding the paper jam problem that occurs during the production of the upper pressure mold 4 and the lower pressure mold 5 in the prior art.

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