A kind of anti-stretching rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blank

Abstract

The present application relates to a kind of production of wrinkle-free aluminum foil container ultra-thin blank anti-stretching roll processing equipment, belong to aluminum foil container processing technical field, a kind of production of wrinkle-free aluminum foil container ultra-thin blank anti-stretching roll processing equipment, including two support plates, the top middle portion of two support plates is rotatably connected with driving roller, lifting roll pressing mechanism is arranged between the two support plates and is located below driving roller, the design of the present application is adopted, aluminum foil blank is sequentially passed first driven roller, first lifting roller, second lifting roller, driving roller, third lifting roller, fourth lifting roller and second driven roller, forms "S" shape multi-section angle winding path, so that blank mainly bears radial pressure rather than axial tension, fundamentally avoids the longitudinal excessive stretching caused by roll gap extrusion, ensures that ultra-thin blank can still maintain the thickness accuracy of design after flattening.

Description

Technical Field

[0001] This invention belongs to the field of aluminum foil container processing technology, specifically relating to an anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks. Background Technology

[0002] In the production of aluminum foil containers (such as lunch boxes and baking trays), extremely thin aluminum foil blanks (typically between 0.03mm and 0.08mm thick) are often used to reduce material costs and meet lightweight requirements. However, the core technical challenge in the roll forming process of ultra-thin aluminum foil lies in the fact that while traditional roller extrusion equipment can provide significant linear pressure to eliminate wrinkles, the rigid pressure between the driving and driven rollers means that the blank is easily subjected to excessive longitudinal traction when passing through the roller gap, leading to irreversible plastic stretching. This stretching not only significantly reduces the effective thickness of the blank and lowers the container's strength, but also creates new wavy edges or "ruffled edges" defects due to uneven material flow along the width direction, ultimately affecting the container's sealing performance and appearance quality.

[0003] In existing technologies, some equipment attempts to alleviate this problem by reducing the inter-roll pressure or increasing the roll diameter ratio, but with little success. On the one hand, insufficient pressure cannot effectively eliminate the stubborn wrinkles in the raw material itself; on the other hand, in traditional two-roll or three-roll pressing layouts, all rolls are on the same horizontal or vertical plane, and the aluminum foil still generates significant frictional traction when wrapping at the corners. For ultra-thin billets with extremely tight thickness tolerances, this traction force is sufficient to cause them to exceed the elastic deformation limit and enter the plastic stretching zone. In addition, the adjustment of the roll gap in existing equipment relies on manual calibration, which is slow in response and difficult to guarantee in terms of accuracy, and cannot meet the real-time control requirements of high-speed automated production lines for billet tension and leveling effect. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and rationally designed anti-stretch rolling processing equipment for producing ultra-thin blanks of wrinkle-free aluminum foil containers in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A stretchable rolling processing device for producing wrinkle-free aluminum foil container ultrathin blanks includes two support plates, an active roller is rotatably connected between the top center of the two support plates, a servo motor for driving the active roller is fixedly installed on one side of the support plates, and a lifting rolling mechanism located below the active roller is lifted and lowered between the two support plates.

[0006] As a further optimization of the present invention, the lifting and rolling mechanism includes a lifting plate that is lifted and disposed below the active roller, and a second lifting roller and a third lifting roller are rotatably connected to the upper side of the lifting plate. The second lifting roller and the third lifting roller are respectively disposed on both sides below the active roller.

[0007] As a further optimization of the present invention, a first driven roller is rotatably arranged on one side of the top of the two support plates, and a second driven roller is rotatably arranged on the other side of the top of the two support plates. The first driven roller and the second driven roller are respectively arranged on both sides of the driving roller.

[0008] As a further optimization of the present invention, a first lifting roller is rotatably provided on one upper end of the lifting plate, and the first lifting roller and the second lifting roller are respectively provided on both sides below the first driven roller.

[0009] As a further optimization of the present invention, a fourth lifting roller is rotatably provided at the other end of the upper side of the lifting plate, and the third and fourth lifting rollers are respectively provided on both sides below the second driven roller.

[0010] As a further optimization of the present invention, a rolling base is fixedly provided on the upper middle part of the lifting plate, and the upper surface of the rolling base is provided with an arc, which cooperates with the active roller.

[0011] As a further optimization of the present invention, a hydraulic cylinder is fixedly installed at the bottom of the lifting plate, and the hydraulic cylinder drives the lifting plate to rise and fall.

[0012] As a further optimization of the present invention, both ends of the two support plates are provided with vertical grooves, and the four corners of the lifting plate are fixedly provided with sliders that slide inside the grooves. The outer sides of the four sliders are provided with threaded holes, and one side of each of the four threaded holes is threaded with a positioning screw that is pressed against one side of the support plate.

[0013] The beneficial effects of this invention are as follows: 1. This invention breaks through the traditional "top and bottom roller" pressing mode, adopting a design of active roller combined with a lower lifting and rolling mechanism. The aluminum foil blank sequentially wraps around the first driven roller, the first lifting roller, the second lifting roller, the active roller, the third lifting roller, the fourth lifting roller, and the second driven roller, forming an "S"-shaped multi-segment wrapping path. In this path, the active roller only provides driving power, while the lifting and rolling mechanism provides support from below, so that the blank mainly bears radial pressure rather than axial tension, fundamentally avoiding excessive longitudinal stretching caused by roller gap extrusion, and ensuring that the ultra-thin blank can still maintain the designed thickness accuracy after leveling.

[0014] 2. In this invention, an arc-shaped rolling base is set in the middle of the lifting plate. The arc surface of the base precisely matches the outer circular surface of the active roller. When the lifting plate is raised, the aluminum foil blank is clamped between the active roller and the rolling base. Compared with the traditional rigid line contact roller pressing, this "surface contact" or "wide arc surface contact" method significantly reduces the pressure per unit area and increases the contact area. This allows the leveling pressure to be applied more evenly in the width direction of the aluminum foil, effectively avoiding stress concentration and thickness reduction caused by excessive local pressure.

[0015] 3. This invention constructs a multi-stage "calendering + bending" composite leveling unit by placing the first and second lifting rollers on both sides below the driving roller and corresponding to the first driven roller, and the third and fourth lifting rollers corresponding to the second driven roller. The aluminum foil is repeatedly bent between the rollers, which not only effectively releases residual stress within the material but also allows for flexible adjustment of the tension distribution of the blank in each section of the path by changing the wrap angle between the rollers through adjusting the height of the lifting plate. This ensures the leveling effect while preventing necking or breakage caused by excessive tension at a single point.

[0016] 4. This invention utilizes a hydraulic cylinder to drive the lifting plate, with sliding blocks at the four corners engaging with grooves on the support plate to ensure smooth and synchronized lifting movements. Each slider has a threaded hole and a positioning screw on its outer side. After adjusting to the target height, the lifting plate and support plate can be locked together by tightening the positioning screws. This mechanical locking structure effectively resists the enormous reaction force generated during rolling, preventing slight sinking of the lifting plate during continuous operation. This ensures constant roller gap parameters during long-term production, significantly improving equipment reliability and product consistency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first overall structure of the present invention; Figure 2 This is a schematic diagram of the second overall structure of the present invention; Figure 3 This is a schematic diagram of the internal fitting structure of the present invention; Figure 4 This is a schematic diagram of the lifting and rolling mechanism of the present invention.

[0018] In the diagram: 1. Support plate; 2. Driven roller; 3. First driven roller; 4. Second driven roller; 5. Lifting plate; 6. First lifting roller; 7. Second lifting roller; 8. Third lifting roller; 9. Fourth lifting roller; 10. Rolling base; 11. Hydraulic cylinder; 12. Slider; 13. Slide groove; 14. Positioning screw; 15. Threaded hole; 16. Servo motor. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example 1: As Figure 1 , Figure 2 As shown, an anti-stretch rolling processing device for producing ultra-thin blanks for wrinkle-free aluminum foil containers includes two opposing support plates 1. A drive roller 2 is rotatably connected between the top center of the two support plates 1. A servo motor 16 for driving the drive roller 2 is fixedly installed on one side of the support plate 1. A lifting and rolling mechanism located below the drive roller 2 is lifted and lowered between the two support plates 1.

[0021] In this embodiment, the two support plates 1 are made of Q235 carbon structural steel, and their bottoms are fixed to the workshop floor with anchor bolts to ensure the stability of the entire machine during operation. The surface of the drive roller 2 is hard chrome plated, and its surface roughness is no greater than Ra0.4 to prevent scratching the surface of the ultra-thin aluminum foil during rolling. The servo motor 16 is connected to the shaft end of the drive roller 2 through a reducer to provide stable and adjustable rotational power.

[0022] like Figure 2 , Figure 3 As shown, the lifting and rolling mechanism includes a lifting plate 5 that is lifted and positioned below the drive roller 2. A second lifting roller 7 and a third lifting roller 8 are rotatably connected to the upper side of the lifting plate 5. The second lifting roller 7 and the third lifting roller 8 are respectively positioned on both sides below the drive roller 2. The lifting plate 5 is a rectangular thick steel plate, and its length direction is parallel to the axial direction of the drive roller 2.

[0023] The second lifting roller 7 and the third lifting roller 8 are both rotatably mounted on the upper surface of the lifting plate 5 via bearing seats. In the vertical direction, the second lifting roller 7 is located to the lower left of the drive roller 2, and the third lifting roller 8 is located to the lower right of the drive roller 2, arranged symmetrically. When the lifting plate 5 moves upward, the second lifting roller 7 and the third lifting roller 8 rise synchronously, cooperating with the drive roller 2 to form a "bottom support and top pressure" rolling channel for the aluminum foil blank.

[0024] In this embodiment, the surfaces of the second lifting roller 7 and the third lifting roller 8 are coated with a polyurethane elastic layer with a Shore A hardness of 85±5. This elastic layer can provide a certain degree of flexible cushioning during the rolling process, preventing the rigid roller surface from crushing or scratching the ultra-thin aluminum foil. At the same time, its micro-elastic deformation increases the contact area and improves the leveling effect.

[0025] like Figure 1 , Figure 2 , Figure 3As shown, a first driven roller 3 is rotatably mounted on one side of the top of the two support plates 1, and a second driven roller 4 is rotatably mounted on the other side of the top of the two support plates 1. The first driven roller 3 and the second driven roller 4 are respectively located on both sides of the driving roller 2. Specifically, the first driven roller 3 is located on the left side of the driving roller 2, and the second driven roller 4 is located on the right side of the driving roller 2.

[0026] Both the first driven roller 3 and the second driven roller 4 are free-rotating rollers, not connected to a drive motor. They rotate passively by the friction between the aluminum foil blank and the roller surface during the forward movement. The surfaces of the two driven rollers are also polished to guide the aluminum foil smoothly into and out of the working area of ​​the driving roller 2, and to form a multi-segment wrapping path in conjunction with the lifting roller.

[0027] like Figure 3 As shown, a first lifting roller 6 is rotatably mounted on the upper end of the lifting plate 5, and the first lifting roller 6 and the second lifting roller 7 are respectively located on both sides below the first driven roller 3. Specifically, the first lifting roller 6 is located to the lower left of the first driven roller 3, and the second lifting roller 7 is located to the lower right of the first driven roller 3.

[0028] Before entering the drive roller 2, the aluminum foil blank sequentially passes under the first driven roller 3, above the first lifting roller 6, and above the second lifting roller 7, forming the first "S"-shaped winding path. This path causes the blank to undergo two reverse bends before entering the drive roller 2, effectively releasing the initial residual stress inside the blank and eliminating large-amplitude wavy wrinkles carried by the raw material itself.

[0029] like Figure 3 As shown, a fourth lifting roller 9 is rotatably mounted on the other side of the upper side of the lifting plate 5. The third lifting roller 8 and the fourth lifting roller 9 are respectively located on both sides below the second driven roller 4. Specifically, the third lifting roller 8 is located to the lower left of the second driven roller 4, and the fourth lifting roller 9 is located to the lower right of the second driven roller 4.

[0030] After leaving the drive roller 2, the aluminum foil blank sequentially passes under the third lifting roller 8, under the fourth lifting roller 9, and above the second driven roller 4, forming a second "S"-shaped winding path. This path reverses the bending and shaping of the aluminum foil that has already been rolled and flattened by the drive roller 2, further eliminating any microscopic residual stress that may be generated during the rolling process and ensuring the complete flatness of the output blank.

[0031] like Figure 3 , Figure 4 As shown, a rolling base 10 is fixedly installed on the upper center of the lifting plate 5. The upper surface of the rolling base 10 is provided with an arc, which cooperates with the drive roller 2. The rolling base 10 is fixedly installed in the center of the upper surface of the lifting plate 5 by bolts, and its length is equal to the width of the roller surface of the drive roller 2.

[0032] The radius of the arc on the upper surface of the rolling base 10 is slightly larger than the outer radius of the drive roller 2, forming a crescent-shaped gap between them. This gap is the main rolling channel for the ultra-thin aluminum foil blank. When the lifting plate 5 is raised, the aluminum foil blank is clamped between the outer surface of the drive roller 2 and the arc surface of the rolling base 10. Compared with the traditional line contact rolling, this embodiment adopts the "arc surface contact" method, which greatly increases the contact area, reduces the pressure per unit area, and effectively prevents the ultra-thin blank from being overstretched during the rolling process.

[0033] In this embodiment, the rolling base 10 is made of wear-resistant copper alloy material, and its arc surface is embedded with self-lubricating graphite pillars to ensure that no scratch damage will occur when it slides in contact with the back of the aluminum foil during long-term operation, while reducing the accumulation of frictional heat.

[0034] like Figure 3 , Figure 4 As shown, a hydraulic cylinder 11 is fixedly installed at the bottom of the lifting plate 5. The hydraulic cylinder 11 drives the lifting plate 5 to rise and fall. The cylinder body of the hydraulic cylinder 11 is fixedly installed on the bottom crossbeam between the two support plates 1 through a flange seat, and the top of its piston rod is fixedly connected to the center of the lower surface of the lifting plate 5.

[0035] The hydraulic cylinder 11 is supplied with oil by an external hydraulic station. The extension height of its piston rod can be precisely controlled by the proportional valve of the hydraulic system. When it is necessary to adjust the rolling gap to adapt to aluminum foil blanks of different thicknesses, the hydraulic cylinder 11 drives the lifting plate 5 to rise or fall, changing the distance between the rolling base 10 and the active roller 2, thereby achieving fast and precise gap adjustment.

[0036] like Figure 1 , Figure 2 As shown, both ends of the two support plates 1 are vertically provided with sliding grooves 13, and the four corners of the lifting plate 5 are fixedly provided with sliders 12 that slide inside the sliding grooves 13. Specifically, each support plate 1 has a vertical sliding groove 13 on its front and rear sides, for a total of four sliding grooves 13. Sliders 12 are fixedly installed at the four corners of the lifting plate 5, and each slider 12 is embedded in a corresponding sliding groove 13 and can slide freely up and down within the sliding groove 13.

[0037] like Figure 2 , Figure 3 , Figure 4As shown, each of the four sliders 12 has a threaded hole 15 on its outer side, and a positioning screw 14, which is pressed against one side of the support plate 1, is threaded onto one side of each of the four threaded holes 15. After the hydraulic cylinder 11 drives the lifting plate 5 to the target height, the operator tightens the positioning screw 14 from the outside of the support plate 1, so that the end of the positioning screw 14 abuts against the side wall of the support plate 1, thereby locking the slider 12 and the support plate 1 together. This mechanical locking structure can effectively resist the huge upward reaction force generated during the rolling process, prevent the lifting plate 5 from sinking slightly during continuous high-speed production, and ensure the long-term stability of the rolling gap.

[0038] It should be noted that, in the production of wrinkle-free aluminum foil container ultrathin blanks, the anti-stretch rolling processing equipment first starts by starting the hydraulic cylinder 11 to drive the lifting plate 5 to a suitable height according to the thickness of the aluminum foil blank to be processed, so that the gap between the rolling base 10 and the active roller 2 meets the process requirements. Then, the four positioning screws 14 are tightened to lock the lifting plate 5. The head of the ultrathin aluminum foil blank is then threaded through the material in sequence according to the path of "the lower side of the first driven roller 3 → the upper side of the first lifting roller 6 → the upper and lower sides of the second lifting roller → between the active roller 2 and the rolling base 10 → the upper side of the third lifting roller 8 → the lower side of the second driven roller 4 → the upper side of the fourth lifting roller 9". The servo motor 16 is started, and the active roller 2 begins to rotate. The blank is driven forward by the friction between the active roller 2 and the aluminum foil. In the first S-shaped winding path, the blank undergoes two reverse bends to eliminate the initial stress. Between the active roller 2 and the rolling base 10, the blank is subjected to uniform arc surface pressure to achieve main leveling. In the second S-shaped winding path, the blank undergoes two more reverse bends for shaping and stress release. Finally, the ultra-thin aluminum foil blank, which is completely flat and has no stretching deformation, is output from the lower side of the second driven roller 4 and enters the next stamping process.

[0039] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A stretch roll forming machine for producing ultra-thin blanks for wrinkle-free aluminum foil containers, comprising two support plates (1), characterized in that: An active roller (2) is rotatably connected between the top center of the two support plates (1). A servo motor (16) for driving the active roller (2) to rotate is fixedly installed on one side of the support plate (1). A lifting and rolling mechanism located below the active roller (2) is lifted and lowered between the two support plates (1).

2. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 1, characterized in that: The lifting and rolling mechanism includes a lifting plate (5) that is lifted and lowered below the active roller (2). The upper side of the lifting plate (5) is rotatably connected to a second lifting roller (7) and a third lifting roller (8). The second lifting roller (7) and the third lifting roller (8) are respectively located on both sides below the active roller (2).

3. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 2, characterized in that: A first driven roller (3) is rotatably arranged on one side of the top of the two support plates (1), and a second driven roller (4) is rotatably arranged on the other side of the top of the two support plates (1). The first driven roller (3) and the second driven roller (4) are respectively arranged on both sides of the driving roller (2).

4. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 3, characterized in that: The upper end of the lifting plate (5) is rotatably provided with a first lifting roller (6), and the first lifting roller (6) and the second lifting roller (7) are respectively located on both sides below the first driven roller (3).

5. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 4, characterized in that: The other end of the upper side of the lifting plate (5) is rotatably provided with a fourth lifting roller (9), and the third lifting roller (8) and the fourth lifting roller (9) are respectively located on both sides below the second driven roller (4).

6. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 1, characterized in that: A rolling base (10) is fixedly installed on the upper middle part of the lifting plate (5). The upper surface of the rolling base (10) is provided with an arc, which cooperates with the active roller (2).

7. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 2, characterized in that: A hydraulic cylinder (11) is fixedly installed at the bottom of the lifting plate (5), and the hydraulic cylinder (11) drives the lifting plate (5) to rise and fall.

8. The anti-stretch rolling processing equipment for producing wrinkle-free aluminum foil container ultra-thin blanks according to claim 6, characterized in that: Both ends of the two support plates (1) are vertically provided with sliding grooves (13), and the four corners of the lifting plate (5) are fixedly provided with sliders (12) that slide inside the sliding grooves (13). The four sliders (12) are provided with threaded holes (15) on the outside, and the four threaded holes (15) are threaded with positioning screws (14) that are pressed against one side of the support plate (1).

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