Automatic high-speed curling forming device and process

Abstract

The invention discloses an automatic high-speed curling forming device and process, and belongs to the technical field of paper container processing. The device integrates a mold body station steam wetting mechanism, a micropore pre-curling self-lubricating mechanism, a scraper type fine curling mechanism and a conveying mechanism, the process is implemented according to the sequence of steam wetting, lubricating pre-curling and scraper pre-curling, paper is accurately softened through a closed steam wetting structure, and the steam utilization rate is increased; the micropore self-lubricating pre-rolling structure is utilized to cancel an independent oil dipping station, and continuous directional lubrication in the pre-rolling process is achieved; the stiffness of the paper is damaged by the scraper type fine rolling structure, and the rolled edge is compacted to avoid rebounding. The problems that a traditional hemming production line is large in occupied space, poor in wetting effect, insufficient in pre-rolling lubrication and unstable in hemming quality are solved, compact layout is achieved, and the hemming forming qualification rate is increased.

Description

Technical Field

[0001] This invention relates to the field of edge-rolling forming technology for paper containers such as paper cups and paper bowls, and particularly to an integrated edge-rolling forming device and process that integrates steam wetting, self-lubricating pre-rolling, and scraper-type fine rolling. Background Technology

[0002] In the conventional edge-rolling process of paper cups and bowls, existing technologies suffer from numerous drawbacks due to the dispersed arrangement of multiple workstations: Dispersed workstations and large space occupation: Traditional production lines separate cup mouth wetting, pre-rolling lubrication, and edge rolling into independent workstations, which increases the overall length of the machine and the floor area, making it unsuitable for compact production line layout; Poor wetting effect and low steam utilization: The paper in the independent wetting station has a short absorption time and uneven wetting. In addition, the open steam spray is prone to steam diffusion, which wastes energy and can also corrode surrounding components. Insufficient lubrication during pre-winding: Setting up a separate oiling station before pre-winding not only takes up space, but also easily leads to uneven lubrication and intermittent oil supply, affecting the smoothness of pre-winding; Unstable edge curling quality: Conventional edge curling molds cannot break the stiffness of the paper, and the edge curling is prone to problems such as wrinkles and overlapping, rebound after forming, and insufficient curling.

[0003] To solve the above problems, this invention integrates the core technologies of steam wetting, self-lubricating pre-rolling, and scraper-type precision rolling to form an integrated edge-rolling forming solution. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an automated high-speed curling and forming device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This automated high-speed curling forming device is characterized by comprising a steam wetting mechanism for the mold body station, a microporous pre-rolling self-lubricating mechanism, a scraper-type fine rolling mechanism, and a conveying mechanism for conveying the cup cylinder, connected sequentially; the steam wetting mechanism for the mold body station includes a mold body for fitting the cup cylinder, the mold body having an annular air inlet groove located directly above the upper edge of the cup cylinder, an annular air return groove on the outer side of the upper edge of the cup cylinder, and a ring of air return holes on the inner side of the upper edge of the cup cylinder; the upper end of the air inlet groove has a steam inlet, and the lower end has a steam outlet corresponding to the cup opening; the air return groove is connected to the upper edge of the mold body via a first air duct. The first exhaust port at the end and the return air hole converge into the second annular air duct and then connect to the second exhaust port at the upper end of the mold body; the micro-hole pre-rolling edge self-lubricating mechanism includes a pre-rolling mold with a pre-rolling groove, an oil pool is provided in the pre-rolling mold above the pre-rolling groove, the oil pool is filled with oil storage material, and a number of oil inlet micro-holes are evenly distributed along the circumference of the pre-rolling mold between the oil pool and the pre-rolling groove, the oil inlet micro-holes connect the oil pool and the pre-rolling groove; the scraper-type fine edge rolling mechanism includes a base, a support ring is provided at the center of the base, multiple sets of support surfaces are provided on the outer circle of the support ring, and a number of positioning blocks are provided on the periphery, and an installation groove is formed between the positioning blocks and the support surfaces, and a scraper that can be adjusted along the tilt direction is provided in the installation groove, and a protruding scraper head is provided at the outer end of the scraper.

[0006] The return air vent is L-shaped, and the second air duct has a ring structure. The upper end of the return air vent is connected to the second air duct.

[0007] The steam inlet of the air inlet sump is connected to a steam generator, and the first exhaust port and the second exhaust port are respectively connected to external exhaust fans.

[0008] The oil tank is equipped with a cover plate with an oil inlet at the upper end, and the oil storage material is felt cotton.

[0009] The oil inlet micro-holes are arranged at an angle, and the lower end of the oil inlet micro-holes is connected to the inner semi-circular surface of the pre-rolling groove.

[0010] The positioning block is provided with a row of positioning holes, and bolts are provided in the positioning holes. The scraper is pressed against the support surface of the support ring by the bolts.

[0011] The positioning block has a raised portion at its tail end, and the raised portion forms an extension of the mounting groove between itself and the adjacent positioning block. The raised portion and the scraper are provided with a sliding guide rail and guide groove.

[0012] An integrated paper container edge-rolling forming process is characterized by the following steps: Step 1: Steam wetting treatment: The cup cylinder is fitted into the mold body of the steam wetting mechanism at the mold body station. Steam is sprayed onto the upper edge of the cup cylinder through the air inlet slot, and the steam is recovered through the return air slot and return air hole, so that the upper edge of the cup cylinder is fully wetted; Step 2: Lubricating pre-rolling treatment: The wetted cup cylinder is conveyed to the microporous pre-rolling self-lubricating mechanism. The mouth of the cup cylinder is inserted into the pre-rolling groove. The lubricating oil in the oil pool flows into the pre-rolling groove through the oil inlet micro hole to lubricate the mouth of the cup cylinder. The pre-rolling mold drives the cup cylinder to rotate to complete the pre-rolling; Step 3: Scraper-type fine rolling treatment: The pre-rolled cup cylinder is conveyed to the scraper-type fine rolling mechanism. After adjusting the position of the scraper, the mold rotates, and the scraper and scraper head curl and compact the mouth of the cup cylinder to complete the fine rolling.

[0013] The beneficial effects of this invention are as follows: the improved automated high-speed curling and forming device and process feature an integrated layout that saves space. The three processes of wetting, pre-winding, and finishing are integrated into a compact production line layout, reducing the need for independent workstations. The steam wetting structure is integrated into the cup mold end, extending the paper wetting time, resulting in excellent wetting effect and high steam utilization. The closed-loop steam wetting and dual-circuit return air structure ensures the paper fully absorbs steam, improving wetting uniformity and steam utilization, while avoiding energy waste and component corrosion. Automatic continuous lubrication ensures smooth pre-winding. The microporous self-lubricating structure eliminates the need for additional oiling stations, enabling continuous directional oil supply during pre-winding, reducing pre-winding friction, and increasing the pre-winding forming qualification rate. Stable edge quality is achieved. The scraper-type finishing winding structure breaks down paper stiffness, compacts edge wrinkles, reduces edge rebound rate, and improves roll fullness, ensuring the edge quality of paper containers. Attached Figure Description

[0014] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the steam wetting mechanism for the mold body station of the present invention.

[0016] Figure 2 For the present invention Figure 1 Enlarged view of part A.

[0017] Figure 3 This is a three-dimensional structural view of the steam wetting mechanism at the mold body station of the present invention.

[0018] Figure 4 This is a schematic diagram of the microporous pre-rolled edge self-lubricating mechanism of the present invention.

[0019] Figure 5 For the present invention Figure 4 Enlarged view of part B.

[0020] Figure 6 This is a schematic diagram of the scraper-type fine edge-rolling mechanism of the present invention.

[0021] Figure 7 This is a diagram showing the working state of the scraper-type precision edge-rolling mechanism of the present invention. Detailed Implementation

[0022] The accompanying drawings illustrate the structure of the present invention, and further details will be described below in conjunction with the drawings. In this embodiment, the automated high-speed curling forming device includes a steam wetting mechanism 1 for the mold body station, a microporous pre-rolling self-lubricating mechanism 2, a scraper-type fine rolling mechanism 3 connected in sequence, and a conveying mechanism for conveying the cup 12. The conveying mechanism can be an existing structure such as a turntable conveyor or a transfer robot. See appendix Figure 1-3 The steam wetting mechanism 1 of the mold body station includes a mold body 11 for fitting and sleeved with a cup cylinder 12. The mold body 11 is provided with an annular air inlet groove 13 located directly above the upper edge of the cup cylinder 12, an annular air return groove 16 on the outer side of the upper edge of the cup cylinder 12, and a ring of air return holes 18 on the inner side of the upper edge of the cup cylinder 12. The upper end of the air inlet groove 13 is provided with a steam inlet 14, and the lower end is provided with a steam outlet 15 corresponding to the cup mouth. The air return groove 16 is connected to the first exhaust port 17 at the upper end of the mold body 11 through the first air duct. The air return holes 18 are collected into the annular second air duct and then connected to the second exhaust port 19 at the upper end of the mold body 11. Preferably, the air return hole 18 is L-shaped, the second air duct is annular, and the upper end of the air return hole 18 is connected to the second air duct. The steam inlet 14 of the air inlet groove 13 is connected to a steam generator. The first exhaust port 17 and the second exhaust port 19 are respectively connected to external exhaust fans to form negative pressure exhaust. See appendix Figure 4-5 The microporous pre-rolled edge self-lubricating mechanism 2 includes a pre-rolling mold 21 with a pre-rolling groove 22. An oil pool 23 is provided in the pre-rolling mold 21 above the pre-rolling groove 22. The oil pool 23 is filled with oil storage material 25. Several oil inlet microholes 26 are evenly distributed along the circumference of the pre-rolling mold 21 between the oil pool 23 and the pre-rolling groove 22. The oil inlet microholes 26 connect the oil pool 23 and the pre-rolling groove 22. Preferably, the upper end of the oil pool 23 is provided with a cover plate with an oil inlet 24. The oil storage material 25 is felt cotton, which has a good oil storage and adsorption function. The oil inlet microholes 26 are arranged at an angle to increase the friction of the lubricating oil in the microhole and maintain the balance of the lubricating oil. The lower end of the oil inlet microhole 26 is connected to the inner semi-circular surface of the pre-rolling groove 22 to improve the lubrication effect. See appendix Figure 6-7The scraper-type precision hemming mechanism 3 includes a base 31, a support ring 35 at the center of the base 31, multiple sets of support surfaces 36 on the outer circumference of the support ring 35, and several positioning blocks 37 on the periphery. A mounting groove 38 is formed between the positioning blocks 37 and the support surfaces 36. A scraper 32, adjustable in the tilt direction, is provided within the mounting groove 38. A protruding scraper head 33 is provided at the outer end of the scraper 32. Preferably, a row of positioning holes 39 is provided on the positioning blocks 37, and bolts are fitted into the positioning holes 39. The scraper 32 is pressed against the support surfaces 36 of the support ring 35 by the bolts. The positioning block 37 has a raised portion 310 at its tail end. The raised portion 310 and the adjacent positioning block 37 form an extension of the mounting groove 38, which increases the space for the movement and adjustment of the scraper 32 and makes full use of the positioning block 37. The raised portion 310 and the scraper 32 are provided with a sliding guide rail 311 and a guide groove 312 to guide the movement direction of the scraper 32 and limit the non-movement direction of the scraper 32.

[0023] In this embodiment, the automated high-speed curling forming process includes the following steps: Step 1: Steam wetting treatment: The cup cylinder 12 is fitted into the mold body 11 of the steam wetting mechanism 1 at the mold body station. Steam is sprayed onto the upper edge of the cup cylinder 12 through the air inlet slot 13, and the steam is recovered through the return air slot 16 and the return air hole 18, so that the upper edge of the cup cylinder 12 is fully wetted; Step 2: Lubrication pre-rolling treatment: The wetted cup cylinder 12 is conveyed to the micro-hole pre-rolling edge self-lubricating mechanism 2. The opening of the cup cylinder 12 is inserted into the pre-rolling groove 22. The lubricating oil in the oil pool 23 flows into the pre-rolling groove 22 through the oil inlet micro-hole 26 to lubricate the opening of the cup cylinder 12. The pre-rolling mold 21 drives the cup cylinder 12 to rotate to complete the pre-rolling; Step 3: Scraper 32 type fine rolling treatment: The pre-rolled cup cylinder 12 is conveyed to the scraper 32 type fine rolling edge mechanism 3. After adjusting the position of the scraper 32, the mold rotates, and the scraper 32 and scraper head 33 curl and compact the opening of the cup cylinder 12 to complete the fine rolling.

[0024] The working principle of this invention is to complete the initial edge-rolling of the paper container in the sequence of steam wetting → lubrication pre-winding → scraper fine winding. The specific steps are as follows: Step 1: Steam wetting treatment The conveying mechanism fits the cup cylinder 12 to be rolled onto the mold body 11 of the steam wetting device; Start the steam generator. High-temperature saturated steam enters the annular air inlet groove 13 through the steam inlet 14 at the upper end of the mold body 11. The steam outlet 15 at the lower end of the air inlet groove 13 sprays and wets the upper edge of the cup cylinder 12 in an all-round covering manner. At the same time, the dual-circuit exhaust system is activated: the outer return air duct 16 draws out the steam that is diffused outward through the first exhaust port 17, and the inner L-shaped return air hole 18 draws out the steam inside the cup 12 through the second exhaust port 19, so as to realize the circulation and recovery of steam and reduce the overflow. The cup 12 is held on the mold 11 for a preset time (adjusted according to the thickness of the paper, usually 3-8 seconds) to allow the paper to fully absorb steam and soften the fibers.

[0025] Step 2: Self-lubricating pre-winding treatment The conveying mechanism transports the wetted cup 27 to the pre-winding mold 21 of the self-lubricating pre-winding device, and the opening of the cup 27 is inserted into the pre-winding groove 22. The lubricating oil in the oil tank 23 is absorbed and slowly released by the oil storage material 25 felt cotton, and flows continuously into the inner semi-circular surface of the pre-winding groove 22 through the inclined oil inlet micro-holes 26, automatically lubricating the contact area between the mouth of the cup 27 and the pre-winding groove 22. The pre-rolling mold 21 drives the cup cylinder 27 to rotate, and the opening of the cup cylinder 27 completes the pre-rolling forming along the pre-rolling groove 22. During the process, lubricating oil is continuously replenished, which effectively reduces the pre-rolling friction and ensures the smoothness of pre-rolling.

[0026] Step 3: Scraper-type fine winding process The conveying mechanism transfers the pre-wound cup cylinder 34 to the scraper-type curling mold device 32; According to the specifications of the cup 34, adjust the position of the scraper 32 in the mounting groove and tighten it with bolts to ensure that the distance between the scraper 32 and the upper edge of the cup 34 is appropriate. When the curling mold device starts to rotate, the scraper 32, which is tilted at the same angle, contacts the pre-wound opening of the cup 34, destroying the remaining stiffness of the paper and further curling the opening of the cup 34 outward. The protruding scraper head 33 at the outer end of the scraper blade 32 strikes and presses the folded and overlapping parts of the rolled edge, making the rolled edge tighter and ensuring that the rolled edge is not easy to rebound and has a full curl after final shaping.

[0027] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automated high speed crimp forming apparatus, comprising: The device comprises sequentially connected die body work station steam wetting mechanism, micro-hole pre-crimping self-lubricating mechanism, scraper type fine crimping mechanism, and conveying mechanism for conveying cup cylinder; the die body work station steam wetting mechanism comprises die body for cup cylinder matching and sleeving, annular air inlet groove located directly above the upper edge of the cup cylinder, annular air return groove on the outer side of the upper edge of the cup cylinder, and a circle of air return holes on the inner side of the upper edge of the cup cylinder, steam inlet on the upper end of the air inlet groove, steam outlet corresponding to the cup mouth on the lower end, the air return groove being connected with the first air extraction port on the upper end of the die body through the first air duct, and the air return holes being connected with the second air extraction port on the upper end of the die body after being collected to the annular second air duct; the micro-hole pre-crimping self-lubricating mechanism comprises pre-crimping die with pre-crimping groove, oil pool arranged in the pre-crimping die above the pre-crimping groove, oil storage material filled in the oil pool, and a plurality of oil inlet micro-holes evenly distributed on the circumference of the pre-crimping die between the oil pool and the pre-crimping groove, the oil inlet micro-holes being communicated between the oil pool and the pre-crimping groove; the scraper type fine crimping mechanism comprises base, support ring arranged at the center of the base, a plurality of support surfaces arranged on the outer circle of the support ring, a plurality of positioning blocks arranged on the periphery, mounting groove formed between the positioning blocks and the support surfaces, scraper capable of being adjusted in the inclined direction arranged in the mounting groove, and protruding scraping head arranged on the outer end of the scraper.

2. The apparatus for automated high speed crimp forming of claim 1, wherein, The air return holes are L-shaped, the second air duct is annular structure, and the upper end of the air return holes is connected with the second air duct.

3. The apparatus for automated high speed crimp forming of claim 1, wherein, The steam inlet of the air inlet groove is connected with the steam generator, and the first air extraction port and the second air extraction port are respectively connected with air extractor.

4. The apparatus for automated high speed crimp forming of claim 1, wherein, The upper end of the oil pool is provided with cover plate with oil inlet, and the oil storage material is felt cotton.

5. The apparatus for automated high speed crimp forming of claim 1, wherein, The oil inlet micro-holes are arranged in an inclined manner, and the lower port of the oil inlet micro-holes is communicated with the inner semicircular surface of the pre-crimping groove.

6. The apparatus for automated high speed crimp forming of claim 1, wherein, The positioning blocks are provided with a row of positioning holes, the positioning holes are provided with bolts, and the scraper is pressed on the support surface of the support ring through the bolts.

7. The apparatus for automated high speed crimp forming of claim 1, wherein, The tail end of the positioning block is provided with a raised portion, the raised portion and the adjacent positioning block form an extension part of the mounting groove, and a slidingly matched guide rail and guide groove are arranged between the raised portion and the scraper.

8. An integrated paper container crimping process for the apparatus of claim 1, wherein, The device comprises the following steps: step 1: steam wetting treatment: the cup cylinder is sleeved into the die body of the die body work station steam wetting mechanism, steam is sprayed to the upper edge of the cup cylinder through the air inlet groove, and the steam is recovered through the air return groove and the air return holes, so that the upper edge of the cup cylinder is fully wetted; step 2: lubricating pre-crimping treatment: the wet cup cylinder is conveyed to the micro-hole pre-crimping self-lubricating mechanism, the cup cylinder mouth is clamped into the pre-crimping groove, the lubricating oil in the oil pool flows into the pre-crimping groove through the oil inlet micro-holes, the cup cylinder mouth is lubricated, and the pre-crimping die drives the cup cylinder to rotate to complete the pre-crimping; step 3: scraper type fine crimping treatment: the pre-crimped cup cylinder is conveyed to the scraper type fine crimping mechanism, the position of the scraper is adjusted, the die is rotated, and the scraper and the scraping head curl and compact the cup cylinder mouth to complete the fine crimping.

Images