Cup bottom knurling device of paper cup machine

Abstract

The invention provides a cup bottom knurling device of a paper cup machine, and belongs to the field of paper cup processing equipment, the cup bottom knurling device comprises a machine table and a rotary table, the rotary table is rotatably arranged in the middle of the top of the machine table, the rotary table comprises a plurality of paper cup positioning mechanisms arranged in the circumferential direction, each paper cup positioning mechanism comprises a limiting cylinder and a spring I, and the limiting cylinders penetrate through through holes of the rotary table. According to the paper cup fixing device, the first air cylinder, the limiting block, the limiting barrel and the sleeve are arranged, under the organic cooperation of the first air cylinder, the limiting block and the limiting barrel, fixing and positioning of the paper cup are achieved, the outer side wall of the paper cup is attached to the inner wall of the limiting barrel, the cup bottom of the paper cup is exposed to the bottom of the limiting barrel, and under the organic cooperation of the limiting block and the sleeve, the paper cup is fixed. The cup bottom of the paper cup makes contact with the sleeve, friction force exists between the cup bottom of the paper cup and the contact portion of the sleeve, and therefore the cup bottom of the paper cup is limited through the friction force, displacement of the cup bottom is prevented, and the deformation condition of the cup bottom of the paper cup can be restrained.

Description

Technical Field

[0001] The present application relates to the technical field of paper cup processing equipment, and in particular to a cup bottom knurling device of a paper cup machine. Background Art

[0002] Paper cup machines are primarily used to produce disposable conical-shaped paper cups. They integrate paper conveying, cup body forming, cup rim curling, and bottom sealing, offering excellent production efficiency. Equipped with high-precision molds and control systems, they ensure the cup body has excellent stiffness and roundness. Machines equipped with printing modules can directly imprint advertising graphics on the cup body to promote branding. Machines equipped with knurling mechanisms can add a series of regular concave and convex textures to the bottom of the cup, thereby increasing the structural strength of the bottom area and improving the stability of the paper cup when placed on a table. The existing paper cup machine bottom knurling mechanism usually uses a knurling wheel to press the bottom of the paper cup to perform knurling, such as a paper cup bottom knurling mechanism with publication number CN113183526A, in which the knurling wheel can roll along the through hole to press out knurling on the bottom of the paper cup; However, in actual use, the knurling mechanism may cause deformation of the paper cup due to the squeezing of the knurling wheel, thereby causing damage to the bottom structure of the paper cup, affecting production efficiency. Therefore, a new cup bottom knurling device for a paper cup machine is proposed to meet the needs. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a cup bottom knurling device for a paper cup machine, so as to improve the situation in which paper cups are subjected to irregular patterns and damage due to the extrusion of the knurling wheel during the knurling process.

[0004] To solve the above technical problems, this application provides the following technical solutions: The cup bottom knurling device of the paper cup machine includes a machine platform and a turntable. The turntable is rotatably arranged in the middle of the top of the machine platform. The turntable includes multiple circumferentially arranged paper cup positioning mechanisms. The paper cup positioning mechanisms include a limiting cylinder and a spring. The limiting cylinder is arranged through a through hole of the turntable. The spring is connected between the limiting cylinder and the turntable. A knurling mechanism is further provided below the paper cup positioning mechanism, and the knurling mechanism includes a connecting seat, a sleeve, a motor 1, a connecting rod and a knurling wheel. The connecting seat is mounted on one side of the top of the machine, the lower end of the sleeve is embedded in the top opening of the connecting seat, the motor 1 is mounted inside the connecting seat, the output end of the motor 1 passes through the bottom of the sleeve, the connecting rod is connected to the output end of the motor 1, and the knurling wheel is connected to both sides of the top of the connecting rod; A limiting mechanism is also provided on the top of the machine, which includes: a bracket, a stripping module, a cylinder 1, a limiting block and a suction cup. The bottom of the bracket is connected to the top edge of the machine, the stripping module is connected to the lower middle part of the bracket, the cylinder 1 is connected to the top, the limiting block is connected to one end of the cylinder 1 that passes through the bracket, and the suction cup is connected to the bottom of the limiting block.

[0005] Preferably, the top of the turntable is provided with four through holes equidistantly distributed in the circumferential direction, the number of the limiting cylinders corresponds to the number of the through holes on the top of the turntable, and a receiving cylinder is provided between two adjacent limiting cylinders; The storage tube is a tubular structure with an open top.

[0006] Preferably, the top edge of the limiting cylinder is provided with a flange, the flange is provided parallel to the upper surface of the turntable, the spring is provided at the bottom of the flange, and the inner wall of the limiting cylinder is provided at an angle.

[0007] Preferably, the connecting seat is a cylindrical structure with an open top, and a telescopic rod is provided at the inner bottom end of the connecting seat, and the telescopic rod is provided on the inner side of the second spring.

[0008] Preferably, the sleeve is arranged directly below the limiting cylinder on the front side of the turntable, a groove is provided above the inner wall of the sleeve, and the top surface of the knurling wheel is flush with the bottom surface of the groove on the inner wall of the sleeve.

[0009] Preferably, grooves are provided on both sides of the top of the connecting rod, a spring three is embedded in the top groove of the connecting rod, the other end of the spring three is connected to a slider, the knurling wheel is rotatably connected to the top of the slider, and a tray is provided at the top center of the connecting rod, and the upper surface of the tray is higher than the upper surface height of the knurling wheel.

[0010] Preferably, the bracket is arranged above the turntable, the stripping module is a ring-shaped structure, and the inner diameter of the stripping module is the same as the top diameter of the limiting block.

[0011] Preferably, the limit block is a hollow frustum structure, an inclined surface is provided on the outside of the limit block, and the outer side wall of the limit block is smooth.

[0012] Preferably, the diameter of the suction cup is the same as the bottom diameter of the limiting block.

[0013] Preferably, a second cylinder is provided at the rear side of the bottom of the machine, and the second cylinder is provided directly below the turntable.

[0014] In the present invention, by providing the first cylinder, the limiting block, the limiting cylinder and the sleeve, the first cylinder, the limiting block and the limiting cylinder cooperate with each other to achieve fixed positioning of the paper cup, so that the outer wall of the paper cup fits on the inner wall of the limiting cylinder, and the bottom of the paper cup is exposed to the bottom of the limiting cylinder. With the organic cooperation of the limiting block and the sleeve, the bottom of the paper cup contacts the sleeve, and friction exists between the contact parts of the bottom of the paper cup and the sleeve, thereby producing a limiting effect on the bottom of the paper cup through the friction, preventing the bottom from displacement, and thus suppressing deformation of the bottom of the paper cup.

[0015] In the present invention, by arranging the air cylinder 1, the limiting block, the suction cup, the stripping module, the turntable and the storage cylinder, the paper cup has good airtightness when the bottom structure of the paper cup is complete. With the organic cooperation of the air cylinder 1, the limiting block and the suction cup, the paper cup moves upward with the limiting block and contacts the stripping module. The paper cup is blocked by the stripping module and separates from the suction cup. At this time, the turntable is rotated exactly 45 degrees, and the paper cup can fall into the storage cylinder under the action of its own gravity for storage. It can be taken out after the turntable is subsequently rotated to the side away from the bracket, thereby realizing convenient production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable one skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 Schematic diagram of the support structure in this application; Figure 3 This is a schematic diagram of the cross-sectional structure of the connecting seat in this application; Figure 4 Schematic diagram of the cross-sectional structure of the limit block in this application; Figure 5 This is a schematic diagram of the sleeve structure in this application; Figure 6 This is a schematic diagram of the turntable structure in this application; Figure 7 Schematic diagram of the cross-sectional structure of the limiting cylinder in this application; Figure 8 Schematic diagram of the connecting rod structure in this application; Figure 9 For this application Figure 8 A schematic diagram of the enlarged structure at point A; [Reference Signs] 1. Machine; 101. Motor 2; 102. Cylinder 2; 2. Turntable; 201. Limiting cylinder; 2011. Flanging; 202. Spring 1; 203. Storage cylinder; 3. Connecting seat; 301. Sleeve; 302. Motor 1; 303. Connecting rod; 3031. Spring 3; 3032. Slider; 3033. Tray; 304. Knurled wheel; 305. Spring 2; 306. Telescopic rod; 4. Bracket; 401. De-module; 402. Cylinder 1; 403. Limiting block; 404. Suction cup. DETAILED DESCRIPTION

[0018] The following describes in detail the cup bottom knurling device for a paper cup machine provided by the present application, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present application.

[0019] like Figures 1-6 The cup bottom knurling device of the paper cup machine shown in the embodiment of the present application includes a machine platform 1 and a turntable 2. The turntable 2 is rotatably arranged in the middle of the top of the machine platform 1. A second motor 101 is provided on the top of the machine platform 1 for driving the turntable 2 to rotate. The turntable 2 includes a plurality of circumferentially arranged paper cup positioning mechanisms. The paper cup positioning mechanisms include a limiting cylinder 201 and a spring 1 202. The limiting cylinder 201 is provided through a through hole of the turntable 2. The spring 1 202 is connected between the limiting cylinder 201 and the turntable 2. A knurling mechanism is also provided below the paper cup positioning mechanism. The knurling mechanism includes a connecting seat 3, a sleeve 301, a motor 1 302, a connecting rod 303, a knurling wheel 304 and a spring 2 305. The connecting seat 3 is installed on one side of the top of the machine 1. The lower end of the sleeve 301 is embedded in the top opening of the connecting seat 3. The motor 1 302 is installed inside the connecting seat 3. The output end of the motor 1 302 passes through the bottom of the sleeve 301. The connecting rod 303 is connected to the output end of the motor 1 302. The knurling wheel 304 is connected to both sides of the top of the connecting rod 303. The spring 2 305 is provided at the bottom of the sleeve 301. A sealing ring is connected between the connecting seat 3 and the sleeve 301. A limiting mechanism is also provided on the top of the machine 1. The limiting mechanism includes: a bracket 4, a stripping module 401, a cylinder 1 402, a limiting block 403, and a suction cup 404. The bottom of the bracket 4 is connected to the top edge of the machine 1, the stripping module 401 is connected to the lower middle part of the bracket 4, the cylinder 1 402 is connected to the top, the limiting block 403 is connected to one end of the cylinder 1 402 that passes through the bracket 4, and the suction cup 404 is connected to the bottom of the limiting block 403. The turntable 2 is provided with a plurality of limiting cylinders 201. The limiting cylinders 201 are designed with a groove-shaped space inside to accommodate paper cups. The turntable 2 is rotated by the rotation of the motor 2 101. The plurality of limiting cylinders 201 can be used in rotation. When in use, they are connected to an external conveying device so that a single paper cup can enter the limiting cylinder 201. When the limiting cylinder 201 carries the paper cup and rotates to the point just above the knurling wheel 304, the cylinder 1 402 drives the limiting block 403 and the suction cup 404 to move downward. During the downward movement, the limiting block 403 is inserted into the limiting cylinder 201. The limiting block 403 squeezes the limiting cylinder 201 to achieve fixed positioning of the paper cup. Then, the limiting block 403 continues to move downward to squeeze the limiting cylinder 201 downward, causing the spring 1 202 to contract, so that the outer wall of the paper cup fits against the inner wall of the limiting cylinder 201, exposing the bottom of the paper cup to the bottom of the limiting cylinder 201. As the limiting cylinder 201 moves downward, the bottom of the paper cup contacts the sleeve 301. Friction occurs between the contact area between the bottom of the paper cup and the sleeve 301, thereby limiting the bottom of the paper cup through friction, preventing displacement of the bottom of the paper cup, thereby suppressing deformation of the bottom of the paper cup. Under the pressure of the limiting cylinder 201, the sleeve 301 moves downward to squeeze the second spring 305. The sleeve 301 is embedded in the interior of the connecting seat 3. The second spring 305 provides a continuous squeezing force, so that the friction between the bottom of the paper cup and the sleeve 301 is stable. The bottom of the sleeve 301 is provided with a hollow hole. At the same time, the sleeve 301 is slidable relative to the output end of the motor 1 302, thereby preventing the sleeve 301 from rotating. When the sleeve 301 moves relative to the connecting base 3, the air in the connecting base 3 is squeezed and the pressure increases. The pressure is used to squeeze the bottom of the paper cup. This part of the squeezing force counteracts the squeezing force of the knurling wheel 304 on the cup bottom, thereby suppressing the deformation of the paper cup. As the sleeve 301 moves downward, the knurling wheel 304 is embedded in the bottom of the paper cup, and the motor 1 302 drives the connecting rod 303 to rotate, and the connecting rod 303 drives the two knurling wheels 304 to rotate, and the knurling wheels 304 generate a series of regular concave and convex textures on the bottom of the paper cup, thereby achieving a knurling effect.

[0020] In this embodiment, Figure 2-Figure 9 As shown, the top of the turntable 2 is provided with four through holes equidistantly distributed in the circumferential direction. The number of the limiting cylinders 201 corresponds to the number of the through holes on the top of the turntable 2. A receiving cylinder 203 is provided between two adjacent limiting cylinders 201. The storage tube 203 is a cylindrical structure with an open top; Four limiting cylinders 201 are provided on the turntable 2. The four limiting cylinders 201 transport the paper cups to the top of the knurling mechanism in turn to maintain a good production rhythm. When the paper cups in one limiting cylinder 201 are being knurled, the other three limiting cylinders 201 can perform different production operations. When the bottom structure of the paper cup is intact, it has good sealing performance. When the cylinder 1 402 contracts, the suction cup 404 can absorb the paper cup and move it upward. The paper cup moves upward with the limit block 403 and contacts the removal module 401. The paper cup is blocked by the removal module 401 and is freed from the attraction of the suction cup 404. At this time, the turntable 2 is rotated exactly 45 degrees, and the paper cup can fall into the storage tube 203 under the action of its own gravity for storage. It is then taken out after the turntable 2 rotates to the side away from the bracket 4.

[0021] The top edge of the limiting cylinder 201 is provided with a flange 2011, which is arranged parallel to the upper surface of the turntable 2. The spring 1 202 is arranged at the bottom of the flange 2011, and the inner wall of the limiting cylinder 201 is arranged obliquely. The limiting cylinder 201 is provided with a flange 2011 so that it cannot pass through the through hole of the turntable 2. The limiting cylinder 201 can only move vertically relative to the turntable 2. The spring 1 202 can provide a buffer to prevent the limiting block 403 from impacting the limiting cylinder 201 and damaging the paper cup inside. The limiting cylinder 201 is provided with an inclined surface, so that the extrusion force generated by the limiting block 403 on the limiting cylinder 201 can produce a positioning and guiding effect, so that the limiting cylinder 201 is aligned with the sleeve 301, thereby achieving good accuracy and allowing the bottom of the paper cup to be aligned with the sleeve 301.

[0022] The connecting base 3 is a cylindrical structure with an open top. A telescopic rod 306 is provided at the bottom end of the connecting base 3. The telescopic rod 306 is provided on the inner side of the second spring 305. The movement of the sleeve 301 is limited by the telescopic rod 306 at the bottom of the connecting base 3, so that the sleeve 301 can only move in the vertical direction relative to the connecting base 3, thereby preventing the sleeve 301 from rotating.

[0023] The sleeve 301 is arranged just below the limiting cylinder 201 on the front side of the turntable 2. A groove is provided on the upper inner wall of the sleeve 301. The top surface of the knurled wheel 304 is flush with the bottom surface of the groove on the inner wall of the sleeve 301. Accurate positioning is achieved by a second motor 101 with a servo system. The groove provided on the sleeve 301 is used to connect with the bottom of the paper cup. The paper cup can be inserted into the top opening of the sleeve 301. The outer wall of the paper cup fits in the wall of the groove, including the outer circumference of the paper cup and the bottom of the paper cup. When the paper cup is squeezed by the air generated by the sleeve 301 and the connecting seat 3, the paper cup cannot expand outward, thereby maintaining the shape of the paper cup and reducing the deformation caused by the knurling wheel 304 squeezing the paper cup. Since existing paper cups are usually in the shape of a frustum, the corresponding groove wall of the sleeve 301 can also be designed as an inclined surface that fits the shape of the paper cup.

[0024] Grooves are formed on both sides of the top of the connecting rod 303. A spring 3031 is embedded in the groove at the top of the connecting rod 303. The other end of the spring 3031 is connected to a slider 3032. The knurled wheel 304 is rotatably connected to the top of the slider 3032. A tray 3033 is provided at the center of the top of the connecting rod 303. The upper surface of the tray 3033 is higher than the upper surface of the knurled wheel 304. The groove designed in the connecting rod 303 is used to limit the spring 3031. The spring 3031 squeezes the slider 3032, causing the slider 3032 to move away from the midpoint of the connecting rod 303. This allows the knurling wheel 304 to fit the bottom of the paper cup and maintain a certain squeezing force. This can produce a good knurling effect while also preventing the paper cup from being damaged due to excessive squeezing force. Existing paper cups usually also include a joint, which is relatively thick. The spring 3031 can flexibly contract, thereby preventing the joint from being damaged due to excessive squeezing force. Under the support of the tray 3033, the tray 3033 can protect the bottom of the cup. When the suction cup 404 presses the paper cup downward, the air in it can be quickly discharged due to the presence of the tray 3033, so that the suction cup 404 can stably adsorb the paper cup. The organic cooperation between the tray 3033 and the suction cup 404 can further position the paper cup and prevent it from rotating.

[0025] The bracket 4 is arranged above the turntable 2. The stripping module 401 is an annular structure. The inner diameter of the stripping module 401 is the same as the top diameter of the limit block 403. The stripping module 401 is annular, corresponding to the shape of the mouth of the paper cup, achieving a good stripping effect and preventing the paper cup from tilting after being stripped.

[0026] The limit block 403 is a hollow frustum structure, an inclined surface is provided on the outside of the limit block 403, and the outer wall of the limit block 403 is smooth; When the limiting block 403 fits tightly against the limiting cylinder 201, the paper cup has a good positioning effect. When the bottom of the paper cup is damaged, the air in the sleeve 301 is discharged from the leak into the limiting cylinder 201, causing the suction cup 404 to lose its adsorption force on the paper cup. The paper cup cannot follow the cylinder 1 402 to separate from the limiting cylinder 201, thereby indicating that there is a quality problem with the paper cup. The paper cup can be taken out after the turntable 2 rotates to the other side, thereby reducing the workload of manual inspection.

[0027] The diameter of the suction cup 404 is the same as the bottom diameter of the limiting block 403; The suction cup 404 covers the bottom surface of the limiting block 403 to prevent the corners of the bottom surface of the limiting block 403 from contacting the paper cup, thereby reducing the problem of paper cup damage caused by hard contact.

[0028] A second cylinder 102 is provided at the rear bottom of the machine 1 and is located directly below the turntable 2. The paper cups that remain in the limiting cylinder 201 can be ejected by the second cylinder 102 , so as to realize the orderly rotation of the limiting cylinder 201 .

Claims

1. A cup bottom knurling device for a paper cup machine, comprising a machine platform (1) and a turntable (2), wherein the turntable (2) is rotatably arranged at the middle position of the top of the machine platform (1), and a motor 2 (101) for driving the turntable (2) to rotate is arranged on the top of the machine platform (1), characterized in that: The turntable (2) includes a plurality of circumferentially arranged paper cup positioning mechanisms, the paper cup positioning mechanisms including a limiting cylinder (201) and a spring (202), the limiting cylinder (201) passing through a through hole of the turntable (2), and the spring (202) connected between the limiting cylinder (201) and the turntable (2); A knurling mechanism is further provided below the paper cup positioning mechanism, and the knurling mechanism comprises a connecting seat (3), a sleeve (301), a motor 1 (302), a connecting rod (303), a knurling wheel (304) and a spring 2 (305). The connecting seat (3) is installed on one side of the top of the machine (1), the lower end of the sleeve (301) is embedded in the top opening of the connecting seat (3), the motor 1 (302) is installed inside the connecting seat (3), the output end of the motor 1 (302) passes through the bottom of the sleeve (301), the connecting rod (303) is connected to the output end of the motor 1 (302), the knurling wheel (304) is connected to both sides of the top of the connecting rod (303), and the spring 2 (305) is provided at the bottom of the sleeve (301); A limiting mechanism is also provided on the top of the machine (1), and the limiting mechanism comprises: a bracket (4), a stripping module (401), a cylinder (402), a limiting block (403) and a suction cup (404), wherein the bottom of the bracket (4) is connected to the top edge of the machine (1), the stripping module (401) is connected to the lower middle portion of the bracket (4), the cylinder (402) is connected to the top, the limiting block (403) is connected to one end of the cylinder (402) passing through the bracket (4), and the suction cup (404) is connected to the bottom of the limiting block (403).

2. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The top of the turntable (2) is provided with four through holes equidistantly distributed in the circumferential direction, the number of the limiting cylinders (201) corresponds to the number of the through holes on the top of the turntable (2), and a storage cylinder (203) is provided between two adjacent limiting cylinders (201); The storage cylinder (203) is a cylindrical structure with an open top.

3. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The top edge of the limiting cylinder (201) is provided with a flange (2011), the flange (2011) is provided parallel to the upper surface of the turntable (2), the spring 1 (202) is provided at the bottom of the flange (2011), and the inner wall of the limiting cylinder (201) is provided in an inclined manner.

4. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The connecting seat (3) is a cylindrical structure with an open top. A telescopic rod (306) is provided at the inner bottom end of the connecting seat (3), and the telescopic rod (306) is provided on the inner side of the second spring (305).

5. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The sleeve (301) is arranged directly below the limiting cylinder (201) on the front side of the turntable (2), a groove is provided above the inner wall of the sleeve (301), and the top surface of the knurled wheel (304) is flush with the bottom surface of the groove on the inner wall of the sleeve (301).

6. The cup bottom knurling device of the paper cup machine according to claim 5, characterized in that: Grooves are provided on both sides of the top of the connecting rod (303), a spring three (3031) is embedded in the groove at the top of the connecting rod (303), the other end of the spring three (3031) is connected to a slider (3032), the knurled wheel (304) is rotatably connected to the top of the slider (3032), a tray (3033) is provided at the center of the top of the connecting rod (303), and the upper surface of the tray (3033) is higher than the upper surface height of the knurled wheel (304).

7. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The bracket (4) is arranged above the turntable (2), the stripping module (401) is an annular structure, and the inner diameter of the stripping module (401) is the same as the top diameter of the limiting block (403).

8. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The limiting block (403) is a hollow frustum structure, an inclined surface is provided on the outside of the limiting block (403), and the outer side wall of the limiting block (403) is smooth.

9. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: The diameter of the suction cup (404) is the same as the bottom diameter of the limiting block (403).

10. The cup bottom knurling device of the paper cup machine according to claim 1, characterized in that: A second cylinder (102) is provided at the rear side of the bottom of the machine (1), and the second cylinder (102) is provided directly below the turntable (2).

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