Cup Barrel Forming Mechanism of Paper Cup Machine

Abstract

The present invention relates to the technical field of paper cup machines, and specifically relates to a cup barrel forming mechanism of a paper cup machine. The present invention includes a frame, on which a forming table is fixedly connected. A paper folding mechanism for folding a paper sheet into a cup barrel shape is connected to the forming table; a paper placing rack for stacking and placing paper sheets is fixedly connected to the frame, and the paper placing rack is arranged above the forming table; a paper picking mechanism for picking the paper sheets in the paper placing rack onto the forming table is connected to the frame; a paper cup mold mechanism that cooperates with the paper folding mechanism and reciprocates is arranged on one side of the forming table. The paper cup mold mechanism includes a conical paper cup mold. An ultrasonic welding mechanism for ultrasonic welding the paper cups and reciprocating is arranged on the other side of the forming table. By arranging the paper placing rack above the forming table, and arranging the conical paper cup mold and the ultrasonic welding mechanism on both sides of the forming table and capable of reciprocating, the present invention reduces the length and occupied space of the paper cup machine equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of paper cup machines, and particularly to a cup barrel forming mechanism of a paper cup machine. Background Art

[0002] A paper cup machine is a special device for producing disposable environmentally friendly paper cups. Its working principle is that a paper feeding mechanism transports the cut outer cup paper to a cup body forming device to form a cup body by folding, and then transports it to a turntable for stamping the cut cup bottom. After hot pressing and knurling, it is transported to a paper cup collecting device, and then a packing operation is carried out. It requires multiple turntables and corresponding mechanisms to coordinate and complete. A high-speed paper cup machine optimizes the time-consuming of each process on the basis of a traditional paper cup machine, thereby shortening the time required for single cup production. With the increase in the paper cup production speed, its cup output rate also increases accordingly.

[0003] When the existing paper cup machine works, the paper sheet in the paper rack is taken off by a paper picking mechanism, and then transported to the forming mechanism by a conveying mechanism to fold and form the paper sheet. Since a conveying mechanism is provided between the paper picking mechanism and the forming mechanism, it increases the length of the paper cup machine equipment, occupies space and the cost of the equipment, and at the same time affects the production efficiency of paper cups. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides a cup barrel forming mechanism of a paper cup machine. By arranging a paper rack above a forming table, a conical paper cup mold and an ultrasonic welding mechanism are respectively arranged on both sides of the forming table and can move back and forth, which can effectively solve the problems of long equipment length and large space occupation of the paper cup machine in the prior art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions:

[0006] The present invention provides a cup barrel forming mechanism of a paper cup machine, including: a frame, a forming table fixedly connected to the frame, and a paper folding mechanism connected to the forming table for folding a paper sheet into a cup barrel shape; a paper rack fixedly connected to the frame for stacking and placing paper sheets, the paper rack being arranged above the forming table; a paper picking mechanism connected to the frame for taking the paper sheets in the paper rack to the forming table; a paper cup mold mechanism that moves back and forth is arranged on one side of the forming table, the paper cup mold mechanism includes a conical paper cup mold, and an ultrasonic welding mechanism that moves back and forth for ultrasonic welding of paper cups is arranged on the other side of the forming table.

[0007] Preferably, the paper rack includes a frame and a plurality of paper blocking rods for limiting the paper sheets, and a paper blocking piece is fixedly connected to the lower end of the paper blocking rod.

[0008] Preferably, the paper cup mold mechanism includes a sliding seat that moves back and forth, and a guiding mechanism fixedly connected to the sliding seat and cooperating with the ultrasonic welding mechanism.

[0009] Preferably, the guiding mechanism includes a fixed frame and a rotating frame rotatably connected to the fixed frame, and a guiding rod is fixedly connected to the rotating frame.

[0010] Preferably, an angle adjusting mechanism is connected between the fixed frame and the rotating frame. The angle adjusting mechanism includes a fixed seat, a slider slidably connected to the fixed seat, and an adjusting screw for adjusting the angle of the rotating frame; and a fixing plate slidably connected in cooperation with the slider is fixedly connected to the rotating frame.

[0011] Preferably, the ultrasonic welding mechanism includes a sliding frame that moves back and forth. A rotating frame is rotatably connected to the sliding frame, and an ultrasonic welding head for welding paper cups is fixedly connected to the rotating frame; and a buffer mechanism is provided in the sliding frame, and the buffer mechanism is rotatably connected to the rotating frame.

[0012] Preferably, a guiding block cooperating with the guiding rod is rotatably connected to the rotating frame, a fixed seat corresponding to the guiding block is fixedly connected to the rotating frame, and the guiding block and the fixed seat are fixedly connected by a threaded rod.

[0013] Preferably, a conveying track for conveying cup barrels is fixedly connected to the machine frame, and cup barrel conveying mechanisms are provided on both sides of the conveying track.

[0014] Preferably, the cup barrel conveying mechanism includes moving frames located on both sides of the conveying track and moving back and forth. A plurality of hook rods for conveying cup barrels are rotatably connected to the moving frames, and springs are fixedly connected between the hook rods and the moving frames.

[0015] Preferably, the cup barrel conveying mechanism further includes a limiting frame cooperating with the moving frame, and the limiting frame is arranged outside the moving frame; a lifting frame moving up and down is slidably connected in the limiting frame, and a limiting block for driving the hook rod to rotate is fixedly connected to the surface of the lifting frame, and the limiting blocks correspond to the hook rods one by one.

[0016] Advantageous Effects

[0017] The technical solution provided by the present invention has the following advantageous effects compared with the known public technologies:

[0018] 1. In the present invention, a paper placing frame is connected above the forming table. After the paper picking mechanism picks up the paper sheet, it is directly placed on the forming table, eliminating the conveying mechanism between the paper picking mechanism and the forming table, reducing the overall length and occupied space of the equipment, and increasing the production efficiency of paper cups.

[0019] 2. In the present invention, the ultrasonic welding mechanism and the conical paper cup mold are respectively arranged on both sides of the forming table. The ultrasonic welding mechanism and the conical paper cup mold move to the forming table in a reciprocating motion manner, and cooperate with the paper folding mechanism to fold and form the paper sheet, avoiding interference with the paper picking mechanism.

[0020] 3. In the present invention, the cup barrel conveying mechanism is provided with a moving frame and a limiting frame. During the movement of the moving frame, the hook rod contacts the limiting block on the limiting frame, and the hook rod rotates, avoiding scratching of the cup barrel by the hook rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a three-dimensional schematic diagram of the paper cup machine in the present invention;

[0023] Figure 2 It is Figure 1 Another perspective schematic diagram of

[0024] Figure 3 It is a structural schematic diagram of the paper feeding rack in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the paper cup mold mechanism in the present invention;

[0026] Figure 5 It is Figure 4 Partial enlarged view of part A in

[0027] Figure 6 It is a structural schematic diagram of the ultrasonic welding mechanism in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the cup barrel conveying mechanism in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the moving frame in the present invention;

[0030] Figure 9 It is a structural schematic diagram of the limiting frame in the present invention.

[0031] The reference numerals in the figure respectively represent: 1, frame; 2, paper feeding rack; 201, frame; 202, paper retaining rod; 203, baffle; 204, connecting piece; 3, paper cup die mechanism; 301, conical paper cup die; 302, sliding seat; 303, guiding mechanism; 3031, fixed frame; 3032, rotating frame; 3033, guiding rod; 3034, fixed seat; 3035, slider; 3036, adjusting screw; 3037, fixing plate; 4, forming table; 5, ultrasonic welding mechanism; 501, sliding frame; 502, ultrasonic welding head; 503, guiding block; 504, threaded rod; 505, rotating frame; 506, buffer mechanism; 507, fixed seat; 6, cup barrel conveying mechanism; 601, moving frame; 602, limiting frame; 6011, hook rod; 6012, spring; 6013, sliding seat; 6014, rod body; 6021, lifting frame; 6022, limiting block; 6023, sliding hole; 6024, moving block; 6025, connecting rod; 7, conveying track; 8, paper picking mechanism. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention will be further described below with reference to the embodiments. Embodiment

[0034] As Figure 1-2As shown in the figure, the present invention is a cup barrel forming mechanism for a paper cup machine, which includes a frame 1. A forming table 4 is fixedly connected to the frame 1. An origami mechanism for folding a paper sheet into a cup barrel shape is connected to the forming table 4. The origami mechanism includes a pair of arc-shaped folding paper boards rotatably connected to the forming table 4. The folding paper boards are fixed on a rotating rod, and the rotating rod is rotatably connected to the forming table 4. The lifting rod is driven by a cylinder to drive the rotating rod to rotate back and forth, and the folding paper boards rotate to fold the paper sheet into a cup barrel shape. A paper placing rack 2 for stacking and placing paper sheets is fixedly connected to the frame 1, and the paper placing rack 2 is arranged above the forming table 4; A paper picking mechanism 8 for picking the paper sheet in the paper placing rack 2 onto the forming table 4 is connected to the frame 1. The paper picking mechanism 8 removes the lowermost paper sheet by adsorption, and the cylinder drives the paper picking mechanism 8 to move up and down back and forth for paper picking; A paper cup mold mechanism 3 that cooperates with the origami mechanism and moves back and forth is arranged on one side of the forming table 4. The paper cup mold mechanism 3 includes a conical paper cup mold 301. An ultrasonic welding mechanism 5 for ultrasonic welding of the paper cup and moving back and forth is arranged on the other side of the forming table 4. The paper cup mold mechanism 3 and the ultrasonic welding mechanism 5 can be respectively arranged on the front and back sides or the left and right sides of the forming table 4. Driving mechanisms for driving the paper cup mold mechanism 3 and the ultrasonic welding mechanism 5 to move back and forth are respectively arranged on the frame 1. The driving mechanism adopts the cooperation of a cylinder and a connecting rod to achieve the purpose of reciprocating motion. After the paper picking mechanism 8 picks the paper sheet onto the forming table 4, the paper cup mold mechanism 3 drives the moving conical paper cup mold 301 to move to the forming table and stay briefly. The origami mechanism folds the paper sheet into a cup barrel shape. The ultrasonic welding mechanism 5 moves above the conical paper cup mold 301 to weld and sew the cup body. After the cup barrel is formed, the ultrasonic welding mechanism 5 and the paper cup mold mechanism 3 move away respectively to avoid hindering the paper picking action of the paper picking mechanism.

[0035] As Figure 3 shown, the paper placing rack 2 includes a frame 201 and a plurality of paper blocking rods 202 for limiting the paper sheet. The frame 201 is installed on the frame 1 through bolts. A falling hole for the paper sheet is provided on the frame 201. The paper blocking rods 202 are fixedly connected to the frame 201 through a connecting piece 204. One end of the connecting piece 204 is provided with a strip-shaped hole. The connecting piece 204 is fixedly connected to the frame 201 through bolts in cooperation with the strip-shaped hole, so that the position of the paper blocking rod 202 can be adjusted. A paper blocking piece 203 is fixedly connected to the lower end of the paper blocking rod 202. The paper blocking piece 203 supports the paper sheet. When picking the paper sheet, the flexibility and bendability of the paper sheet are utilized to pick the paper sheet. The contact area between the paper blocking piece 203 and the paper sheet is not too large to avoid being unable to pick the paper sheet smoothly.

[0036] As Figure 4-5As shown, the paper cup mold mechanism 3 includes a reciprocating slide 302. On one side of the forming table 4, there is a slide rail that slidably cooperates with the slide 302. The slide 302 reciprocates on the slide rail. The conical paper cup mold 301 is fixedly connected to the side of the slide 302 by bolts, facilitating the replacement of the conical paper cup mold 301 to process paper cups with different conical shapes. To enable the ultrasonic welding mechanism 5 to accurately weld the paper cup, a guiding mechanism 303 that cooperates with the ultrasonic welding mechanism 5 is fixedly connected to the slide 302; the guiding mechanism 303 includes a fixed frame 3031 and a rotating frame 3032 rotatably connected to the fixed frame 3031. The fixed frame 3031 is installed on the slide 302 by bolts. Both the fixed frame 3031 and the rotating frame 3032 are U-shaped frames. A guiding rod 3033 is fixedly connected to the rotating frame 3032. There are a pair of guiding rods 3033, and the guiding rods 3033 play a guiding role for the ultrasonic welding mechanism 5; to enable the ultrasonic welding mechanism 5 to adapt to conical paper cup molds 301 of different specifications, an angle adjustment mechanism is connected between the fixed frame 3031 and the rotating frame 3032. The angle adjustment mechanism adjusts the angle between the rotating frame 3032 and the fixed frame 3031, and further adjusts the angle when the ultrasonic welding head 502 contacts the conical paper cup mold 301, so that the ultrasonic welding head 502 can be in close tangency with the surface of conical paper cup molds 301 of different specifications, ensuring the contact tightness between the two. The angle adjustment mechanism of this embodiment includes a fixed seat 3034, a slider 3035 slidably connected to the fixed seat 3034, and an adjustment screw 3036 for adjusting the angle of the rotating frame 3032. The fixed seat 3034 is fixedly connected to the fixed frame 3031. The fixed seat 3034 is provided with a limiting hole that slidably connects with the slider 3035; the adjustment screw 3036 is rotatably connected to the fixed seat 3034. One end of the adjustment screw 3036 is rotatably connected to the slider 3035, and a fixing plate 3037 that cooperates with the slider 3035 is fixedly connected to the rotating frame 3032. The fixing plate 3037 is provided with a strip-shaped hole. The fixing plate 3037 and the strip-shaped hole are in an inclined state rather than a horizontal state. The slider 3035 and the strip-shaped hole are further fixedly connected by bolts and nuts to ensure the stable angle of the rotating frame 3032. By rotating the adjustment screw 3036, the position of the slider 3035 is changed. The slider 3035 drives the bolt rod to slide in the strip-shaped hole, thereby driving the rotating frame 3032 to rotate, adjusting the angle between the two, and achieving the purpose of adjusting the welding position and welding effect.

[0037] As Figure 6As shown in the figure, the ultrasonic welding mechanism 5 includes a sliding frame 501 that moves back and forth. On the other side of the forming table 4, there is also a slide rail that slidably cooperates with the sliding frame 501. The cylinder drives the sliding frame 501 to move back and forth on the slide rail. A rotating frame 505 is rotatably connected to the sliding frame 501. An ultrasonic welding head 502 for welding paper cups is fixedly connected to the rotating frame 505 by bolts. A guiding block 503 that cooperates with the guiding rod 3033 is rotatably connected to the rotating frame 505. The guiding block 503 is provided with an arc-shaped structure guiding groove. And a buffer mechanism 506 is provided inside the sliding frame 501. The buffer mechanism 506 is rotatably connected to the rotating frame 505. In this embodiment, the buffer mechanism includes a slide rod. A slider is slidably connected to the slide rod. A connecting rod is rotatably connected between the slider and the rotating frame 505. And a spring is connected to the slide rod. When the ultrasonic welding mechanism 5 approaches the forming table 4, through the cooperation of the guiding rod 3033 and the guiding block 503, the rotating frame 505 flips downward, and the spring is compressed by force. The ultrasonic welding head 502 contacts the cup barrel for welding. During welding, the ultrasonic welding head 502 is flush and tangent to the surface of the conical paper cup mold to ensure full welding at each position. When the ultrasonic welding mechanism 5 moves away from the forming table 4, the buffer mechanism 506 drives the rotating frame 505 to rotate in the opposite direction. When the guiding block 503 disengages from the end of the guiding rod 3033, the rotating frame 505 just returns to its original position, so that the guiding block 503 and the end of the guiding rod 3033 are at the same height for the next cooperation.

[0038] To ensure the stable angle of the guiding block 503 and its angle cooperation with the guiding rod 3033, a fixed seat 507 corresponding to the guiding block 503 is fixedly connected to the rotating frame 505. The guiding block 503 and the fixed seat 507 are fixedly connected by a threaded rod 504. The fixed seat 507 is provided with a groove. A threaded sleeve that is threadedly connected to the threaded rod 504 is rotatably connected inside the groove. At the same time, a limit nut is connected to the threaded rod 504 to prevent the threaded rod 504 from unthreading during use. And a connecting sleeve that is rotatably connected to the threaded rod 504 is rotatably connected to the guiding block 503. Rotating the threaded rod 504 can drive the guiding block 503 to rotate and adjust its angle to cooperate with the angle of the guiding rod 3033.

[0039] As Figure 7-9As shown in the figure, a conveying track 7 for cup barrels is fixedly connected to the frame 1. Cup barrel conveying mechanisms 6 are arranged on both sides of the conveying track 7. After forming, the cup barrels are transported to the next working station through the cup barrel conveying mechanisms 6 via the conveying track 7. The cup barrel conveying mechanism 6 includes moving frames 601 and limiting frames 602 that are located on both sides of the conveying track 7 and move back and forth. The limiting frame 602 is arranged outside the moving frame 601. The moving frame 601 is fixedly connected to a sliding seat 6013 through a rod body 6014. The frame 1 is provided with a sliding hole that slidably connects with the sliding seat 6013. At the same time, a driving mechanism for driving the sliding seat 6013 to slide back and forth is arranged at the bottom of the frame 1. A plurality of hook rods 6011 for conveying cup barrels are rotatably connected to the moving frame 601. Hook parts are arranged at the ends of the hook rods 6011. The hook parts are in contact with the open ends of the cup barrels to drive the cup barrels to move. Through the cooperation of the plurality of hook rods 6011, the segmented movement of the cup barrels is achieved to convey the cup barrels. Spring 6012 is fixedly connected between each hook rod 6011 and the moving frame 601. The spring 6012 adopts a tension spring structure. Both the hook rod 6011 and the moving frame 601 are provided with connection blocks that cooperate with the spring 6012. A lifting frame 6021 that moves up and down back and forth is slidably connected inside the limiting frame 602. The limiting frame 602 is provided with a vertical sliding hole that slidably cooperates with the lifting frame 6021. A moving block 6024 that moves back and forth in the front and back direction is slidably connected inside the limiting frame 602. A horizontal sliding hole that slidably cooperates with the moving block 6024 is arranged inside the limiting frame 602. The reciprocating movement of the moving block 6024 is driven through the cooperation of an air cylinder and a lifting rod, thereby driving the lifting frame 6021 to move up and down back and forth. A limiting block 6022 that cooperates with the hook rod 6011 and can make it rotate is fixedly connected to the surface of the lifting frame 6021. The limiting block 6022 has a trapezoidal structure. The limiting block 6022 corresponds to the hook rod 6011 one by one. When the moving frame 601 moves closer to the forming table, the lifting frame 6021 rises. The limiting block 6022 contacts the end of the hook rod 6011 away from the hook part, and the hook rod 6011 rotates, avoiding the problem that the hook part on the hook rod 6011 contacts the cup barrel, causing scratches to the cup barrel and changing the position of the cup barrel. When the moving frame 601 moves away from the forming table, the lifting frame 6021 descends, avoiding the limiting block 6022 from obstructing the stroke of the hook rod 6011. The spring 6012 makes the hook rod 6011 return to its original position, and the hook rod 6011 conveys the cup barrel forward.

[0040] Working principle of the present invention: During operation, the paper picking mechanism 8 picks the paper sheets in the paper feeding rack 2 to the forming table 4. The paper cup mold mechanism 3 moves above the forming table 4. The paper folding mechanism folds the paper sheets into a paper barrel shape. The ultrasonic welding mechanism 5 moves above the forming table. Through the guiding cooperation of the guiding mechanism 303, the ultrasonic welding mechanism 5 welds and stitches the paper barrel. Then, the ultrasonic welding mechanism 5 and the paper cup mold mechanism 3 move respectively. The cup barrel conveying mechanism 6 conveys the formed cup barrels to the next working station. The present invention saves the paper feeding mechanism between the paper feeding rack 2 and the forming table 4, reduces the length and occupied space of the paper cup machine equipment, saves the paper feeding time of the paper feeding mechanism, and improves the processing efficiency of the paper cup machine.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cup barrel forming mechanism for a paper cup machine, Characterized in that, Comprising: A frame (1), a forming table (4) is fixedly connected to the frame (1), and an origami mechanism for folding a paper sheet into a cup barrel shape is connected to the forming table (4); A paper placing rack (2) for stacking and placing paper sheets is fixedly connected to the frame (1), and the paper placing rack (2) is arranged above the forming table (4); A paper picking mechanism (8) for picking the paper sheets in the paper placing rack (2) to the forming table (4) is connected to the frame (1); A paper cup mold mechanism (3) that moves back and forth is arranged on one side of the forming table (4), the paper cup mold mechanism (3) includes a conical paper cup mold (301), and an ultrasonic welding mechanism (5) that moves back and forth and is used for ultrasonic welding of the paper cup is arranged on the other side of the forming table (4); A conveying track (7) for conveying the cup barrel is fixedly connected to the frame (1), and cup barrel conveying mechanisms (6) are arranged on both sides of the conveying track (7); The cup barrel conveying mechanism (6) includes moving frames (601) that are located on both sides of the conveying track (7) and move back and forth, and a plurality of hook rods (6011) for conveying the cup barrel are rotatably connected to the moving frames (601), and springs (6012) are fixedly connected between the hook rods (6011) and the moving frames (601); The cup barrel conveying mechanism (6) further includes a limiting frame (602) that cooperates with the moving frame (601), and the limiting frame (602) is arranged outside the moving frame (601); A lifting frame (6021) that moves up and down is slidably connected in the limiting frame (602), a limiting block (6022) for driving the hook rod (6011) to rotate is fixedly connected to the surface of the lifting frame (6021), and the limiting blocks (6022) correspond to the hook rods (6011) one by one.

2. The cup barrel forming mechanism for a paper cup machine according to claim 1, Characterized in that, The paper placing rack (2) includes a frame (201) and a plurality of paper blocking rods (202) for limiting the paper sheets, and a paper blocking piece (203) is fixedly connected to the lower end of the paper blocking rod (202).

3. The cup barrel forming mechanism for a paper cup machine according to claim 1 or 2, Characterized in that, The paper cup mold mechanism (3) includes a sliding seat (302) that moves back and forth, and a guiding mechanism (303) that cooperates with the ultrasonic welding mechanism (5) is fixedly connected to the sliding seat (302).

4. The cup barrel forming mechanism for a paper cup machine according to claim 3, Characterized in that, The guiding mechanism (303) includes a fixed frame (3031) and a rotating frame (3032) rotatably connected to the fixed frame (3031), and a guiding rod (3033) is fixedly connected to the rotating frame (3032).

5. The cup barrel forming mechanism for a paper cup machine according to claim 4, Characterized in that, An angle adjustment mechanism is connected between the fixed frame (3031) and the rotating frame (3032). The angle adjustment mechanism includes a first fixed seat (3034), a slider (3035) slidably connected to the first fixed seat (3034), and an adjustment screw (3036) for adjusting the angle of the rotating frame (3032); and a fixed plate (3037) that is fixedly connected to the rotating frame (3032) and is slidably connected in cooperation with the slider (3035).

6. The cup barrel forming mechanism of the paper cup machine according to claim 4 or 5, characterized in that the ultrasonic welding mechanism (5) includes a sliding frame (501) that moves back and forth, a rotating frame (505) is rotatably connected to the sliding frame (501), and an ultrasonic welding head (502) for welding paper cups is fixedly connected to the rotating frame (505); and a buffer mechanism (506) is provided in the sliding frame (501), and the buffer mechanism (506) is rotatably connected to the rotating frame (505).

7. The cup barrel forming mechanism of the paper cup machine according to claim 6, characterized in that a guide block (503) that cooperates with the guide rod (3033) is rotatably connected to the rotating frame (505), a second fixed seat (507) corresponding to the guide block (503) is fixedly connected to the rotating frame (505), and the guide block (503) and the second fixed seat (507) are fixedly connected by a threaded rod (504).

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