Aluminum foil rolling mill outlet purge device and use method thereof

Abstract

The present invention belongs to the technical field of nonferrous metal processing equipment, and relates to an outlet purge device for an aluminum foil rolling mill, including a roller cleaner and a purge device, wherein the roller cleaner includes: flexible scrapers distributed in an eight-shaped pattern, a bracket for installing the scrapers, a cylinder for driving the bracket to rise and fall, and a pressure regulating valve, and the purge device includes: an outlet arc-shaped slide plate, a support roller purge air nozzle and a roller gap purge air nozzle installed on the outlet arc-shaped slide plate, and an adjusting screw for adjusting the directions of the two air nozzles. The present invention also relates to a method for using an outlet purge device for an aluminum foil rolling mill. The outlet purge device for an aluminum foil rolling mill of the present invention cleans the rolling oil by using a roller cleaner and an outlet side double fan-shaped air nozzle purge method according to the mechanism of the formation of oil on the material surface on the outlet side, so as to prevent the material surface from being oily; the air nozzle shape is designed with a fan surface, and the air nozzle opening is flat in the middle and gradually expands to both sides, which is conducive to the diffusion of gasified oil and gas to the two outer sides, and prevents the oil and gas from condensing and dripping on the rolling material surface again to form oil.

Description

Technical Field

[0001] The invention belongs to the technical field of nonferrous metal processing equipment, and in particular relates to an aluminum foil rolling mill outlet purge device and a use method thereof. Background Art

[0002] With the vigorous development of the packaging industry, aluminum foil with a thickness of less than 0.2mm is widely used as a composite packaging substrate in the pharmaceutical, food, beverage, tobacco and other industries. Aluminum foil packaging has the characteristics of good sealing, moisture resistance, odorlessness, low air permeability, and not easy to age, and is increasingly used in the packaging field. According to incomplete statistics, my country's packaging aluminum foil production in 2020 is close to 2 million tons. The total domestic packaging consumption is nearly 1 million tons, and the market prospects are broad.

[0003] At present, the production of aluminum foil at home and abroad usually adopts the 4-roller production process. Rolling oil is used for lubrication during the rolling process. An extremely thin oil film is adsorbed on the surface of the aluminum foil after rolling. It cannot be directly used for packaging of food, medicine, tobacco, etc., and does not meet the quality requirements of hygiene, safety and packaging plasticity.

[0004] Aluminum foil used for packaging usually needs to be slit and then annealed and degreased at a certain temperature to obtain a certain plasticity and clean surface before it can be used as packaging material.

[0005] Modern rolling mills are usually 4-roll mills, which consist of a 4-roll system consisting of upper and lower support rolls and upper and lower working rolls. The aluminum foil is fed into the gap of the working roll through the entrance. Under the effect of large rolling force and speed, the aluminum foil reaches the target thickness. The rolling of aluminum foil belongs to the rolling without roll gap. The oil on the aluminum foil just out of the roll gap is almost negligible. The oil on the surface of the aluminum foil mainly comes from the oil entrained from the surface of the support roll when it is running at high speed. When the support roll rotates to the outlet side and bites the working roll, under the action of the large pressure without roll gap, the oil entrained by the support roll will be squeezed out at the gap between the support roll and the working roll, forming a thin stream of rolling oil thrown in the rolling direction of the aluminum foil. If the oil-blocking and blowing measures are not taken, there will be a lot of oil on the surface of the aluminum foil, which will seriously affect the surface quality of the aluminum foil, and even form unqualified products such as oil spots and annealing impurities after annealing.

[0006] Therefore, it is necessary to design an aluminum foil rolling mill outlet purge device based on the deficiencies of the existing technology to specifically purge the oil on the surface of the aluminum foil, which can both improve product quality and save production costs. Summary of the invention

[0007] In view of the deficiencies in the above-mentioned prior art, the object of the present invention is to provide an aluminum foil rolling mill outlet purge device, which reduces the impact of oil on the outlet material surface in two aspects: 1. Reducing the amount of oil entrained on the surface of the support roller, which is equivalent to reducing the amount of oil extruded at the contact gap between the working roller and the support roller; 2. By strengthening the purge on the surface of the support roller, the oil entrained on the support roller is gasified by air purge, preventing the extruded oil from dripping on the material surface to form oil.

[0008] According to the above principle, polyester scrapers are used to scrape away most of the rolling oil on the support rollers. The rolling oil brought to the outlet side by the rollers is gasified through two fan-shaped air nozzles and blown away on both sides of the rollers to prevent the rolling oil from forming oil spots and falling on the material surface. At the same time, the arc-shaped slide rail baffle on the outlet side is equivalent to an oil tank, and most of the rolling oil blown off falls on the baffle, gathers in the groove at the bottom of the baffle, and then flows out from both sides. It can not only improve product quality but also save production costs.

[0009] The invention provides an aluminum foil rolling mill outlet purge device, which is modified on the basis of existing support rolls and working rolls, and comprises a roll cleaner and a purge device.

[0010] The roller cleaner comprises: flexible scrapers arranged in an eight-shaped pattern, a bracket for mounting the scrapers, a cylinder for driving the bracket to rise and fall, and a pressure regulating valve.

[0011] The purge device comprises: an outlet arc-shaped slide plate, a support roller purge air nozzle and a roller gap purge air nozzle installed on the outlet arc-shaped slide plate, and an adjusting screw rod for adjusting the directions of the two air nozzles.

[0012] In a preferred disclosed example of the present invention, the flexible scraper with an eight-shaped distribution in the roller cleaner is an integrated polyurethane scraper with a Shore hardness of 60 to 75 HS.

[0013] In a preferred disclosed example of the present invention, the support roller blowing nozzle and the roll gap blowing nozzle are fan-shaped nozzles, and the nozzle widths of the support roller blowing nozzle and the roll gap blowing nozzle match the roll surface width, which is 5%-15% of the mill roll surface width, preferably 10%.

[0014] In the preferred disclosed examples of the present invention, the support roller blowing nozzle and the roller gap blowing nozzle are arc-shaped flat nozzles, and the openings on both sides are larger than the middle, which is conducive to blowing more air to both sides.

[0015] The present invention also relates to a method for using an aluminum foil rolling mill outlet purge device, comprising the following steps:

[0016] A: Open the lifting and retracting cylinder of the roller cleaner, and press the roller cleaner blade against the support roller. The pressing force can be adjusted to 0.5-1.5 bar, preferably 1.0 bar;

[0017] B: After the aluminum foil is threaded through the belt, the arc-shaped slide plate falls down;

[0018] C: Open the air pressure of the support roller blowing nozzle, first adjust the support roller blowing nozzle through the worm, the air pressure is usually 1.0~1.5Bar, adjust the roller gap blowing nozzle according to the oil content of the material surface, the air pressure is usually set to 0.8~1.0Bar;

[0019] D: The support roller purge nozzle purges the rolling oil brought from the support roller surface, so that the rolling oil is gasified and diffused to both sides. The roll gap purge nozzle 7 gasifies the rolling oil squeezed out from the roll gap between the upper support roller and the upper working roller and blows it to both sides to prevent the rolling oil from gathering and dripping onto the material surface.

[0020] E: The rolled oil drops onto the outlet arc-shaped slide plate, flows along the outlet arc-shaped slide plate to the groove at the bottom, gathers along the groove and drops into the oil collecting tank. The oil collecting tank is horizontally high in the middle and low on both sides, which makes it easy for the condensed oil to flow out from both sides after dripping.

[0021] The oil on the lower roller is mainly scraped off by the roller cleaner, and the oil squeezed out of the roller gap falls down by its own weight, and will not cause oil pollution to the lower surface of the aluminum foil.

[0022] The support roller blowing nozzle and roller gap blowing nozzle are fan-shaped in appearance. The fan-shaped nozzle opening is flat in the middle and gradually expands toward the two sides, which enhances the wind force and air volume on both sides, is conducive to the diffusion of oil and gas to both sides, and reduces the chance of oil and gas accumulation and dripping onto the material surface.

[0023] The technical steps are simple and practical, and can effectively block and purge the oil on the material surface at the outlet side.

[0024] Beneficial Effects

[0025] The aluminum foil rolling mill outlet purging device described in the present invention has a simple and practical structure. The rolling oil is purged clean by a roller cleaner and a support roller purging nozzle to prevent the material surface from being stained with oil. The adopted nozzle shape is designed with a fan-shaped surface, and the nozzle opening is flat in the middle and gradually expands to both sides, which is conducive to the diffusion of gasified oil and gas to the two outer sides, and prevents the oil and gas from condensing again and dripping on the rolling material surface to form oil. The double fan-shaped nozzle is adopted to avoid the cooling effect on the roll shape of the working roll when the roll gap nozzle is used alone, resulting in the upper working roll being disturbed by the air volume adjustment, which has an adverse effect on the aluminum foil plate shape. When the single nozzle is used, the air volume is too small and the effect of preventing the aluminum foil material surface from being stained with oil cannot be achieved. The double nozzle is adopted to strengthen the purging of the support roller by increasing the air volume of the nozzle, reduce the influence of the 7 large air volumes of the nozzles in the roll gap area on the roll shape of the working roller, and is conducive to stabilizing the aluminum foil plate shape. The double fan-shaped nozzle direction is individually adjusted by the worm gear, which is used to adjust the wind direction of each purging area of ​​the nozzle, so as to maximize the purging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic diagram of the working principle of the outlet purge device of the aluminum foil rolling mill described in the present invention.

[0027] The names of the components are: 1. Support roller, 2. Working roller, 3. Roller cleaner, 4. Exit arc slide, 5. Nozzle direction adjustment screw, 6. Support roller purge nozzle, 7. Roll gap purge nozzle, 8. Oil collecting tank, 9. Aluminum foil. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with the embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0029] Example 1

[0030] An aluminum foil rolling mill outlet purge device is modified on the basis of the existing support roll 1 and working roll 2, and includes a roll cleaner 3 and a purge device.

[0031] The roller cleaner 3 includes: flexible scrapers arranged in an eight-shaped pattern, a bracket for installing the scrapers, a cylinder for driving the bracket to rise and fall, and a pressure regulating valve.

[0032] The purge device comprises: an outlet arc slide 4, a support roller purge air nozzle 6 and a roller gap purge air nozzle 7 installed on the outlet arc slide 4, and an adjusting screw 5 for adjusting the directions of the two air nozzles.

[0033] The roller cleaner 3 has an integral polyester scraper arranged in an eight-shaped pattern. The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are fan-shaped nozzles. The nozzle width matches the roller surface width and is 5% of the roller surface width of the rolling mill.

[0034] The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are arc-shaped flat nozzles, and the openings on both sides are larger than the middle, which is conducive to blowing more air to both sides.

[0035] Example 2

[0036] An aluminum foil rolling mill outlet purge device is modified on the basis of the existing support roll 1 and working roll 2, and includes a roll cleaner 3 and a purge device.

[0037] The roller cleaner 3 includes: flexible scrapers arranged in an eight-shaped pattern, a bracket for installing the scrapers, a cylinder for driving the bracket to rise and fall, and a pressure regulating valve.

[0038] The purge device comprises: an outlet arc slide 4, a support roller purge air nozzle 6 and a roller gap purge air nozzle 7 installed on the outlet arc slide 4, and an adjusting screw 5 for adjusting the directions of the two air nozzles.

[0039] The roller cleaner 3 has an integrated polyester scraper in an eight-shaped arrangement. The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are fan-shaped nozzles. The nozzle width matches the roller surface width, which is 15% of the roller surface width of the rolling mill.

[0040] The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are arc-shaped flat nozzles, and the openings on both sides are larger than the middle, which is conducive to blowing more air to both sides.

[0041] Example 3

[0042] An aluminum foil rolling mill outlet purge device is modified on the basis of the existing support roll 1 and working roll 2, and includes a roll cleaner 3 and a purge device.

[0043] The roller cleaner 3 includes: flexible scrapers arranged in an eight-shaped pattern, a bracket for installing the scrapers, a cylinder for driving the bracket to rise and fall, and a pressure regulating valve.

[0044] The purge device comprises: an outlet arc slide 4, a support roller purge air nozzle 6 and a roller gap purge air nozzle 7 installed on the outlet arc slide 4, and an adjusting screw 5 for adjusting the directions of the two air nozzles.

[0045] The roller cleaner 3 has an integrated polyester scraper in an eight-shaped arrangement. The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are fan-shaped nozzles. The nozzle width matches the roller surface width, which is 10% of the mill roller surface width.

[0046] The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are arc-shaped flat nozzles, and the openings on both sides are larger than the middle, which is conducive to blowing more air to both sides.

[0047] Example 4

[0048] A method for using an aluminum foil rolling mill outlet purge device comprises the following steps:

[0049] A: Open the lifting and retracting cylinder of the roller cleaner 3, and press the roller cleaner blade against the support roller 1. The pressing force can be adjusted and set to 0.5 bar;

[0050] B: After the aluminum foil 9 is threaded through the belt, it falls down the exit arc slide plate 4;

[0051] C: Open the air pressure of the support roller blowing nozzle 6, first adjust the support roller blowing nozzle 6 through the worm, the air pressure is usually 1.0-1.5 Bar, and adjust the roller gap blowing nozzle 7 according to the oil content on the material surface, the air pressure is usually set to 0.8-1.0 Bar;

[0052] D: The support roller purge nozzle 6 purges the rolling oil brought from the support roller surface, so that the rolling oil is gasified and diffused to both sides. The roll gap purge nozzle 7 gasifies the rolling oil squeezed out from the roll gap between the upper support roller and the upper working roller and blows it to both sides to prevent the rolling oil from gathering and dripping onto the material surface.

[0053] E: The rolled oil is blown off and drops onto the outlet arc-shaped slide plate 4, then flows along the outlet arc-shaped slide plate 4 to the groove at the bottom, gathers along the groove and drops into the oil collecting tank 8. The oil collecting tank 8 is laterally high in the middle and low on both sides, so that the condensed oil can flow out from both sides after dripping.

[0054] The oil on the lower roller is mainly scraped off by the roller cleaner, and the oil squeezed out of the roller gap falls down by its own weight, and will not cause oil pollution to the lower surface of the aluminum foil.

[0055] The support roller blowing nozzle 6 and the roller gap blowing nozzle 7 are fan-shaped in appearance. The fan-shaped nozzle opening is flat in the middle and gradually expands toward the two outer sides, which enhances the wind force and air volume on both sides, is conducive to the diffusion of oil and gas to both sides, and reduces the chance of oil and gas accumulation and dripping onto the material surface.

[0056] Check the oil content on the surface of the material. No visible oil spots were found within 30 minutes.

[0057] Example 5

[0058] A method for using an aluminum foil rolling mill outlet purge device comprises the following steps:

[0059] A: Open the lifting and retracting cylinder of the roller cleaner 3, and press the roller cleaner blade against the support roller 1. The pressing force can be adjusted and set to 1.5 bar;

[0060] B: After the aluminum foil 9 is threaded through the belt, it falls down the exit arc slide plate 4;

[0061] C: Open the air pressure of the support roller blowing nozzle 6, first adjust the support roller blowing nozzle 6 through the worm, the air pressure is usually 1.0-1.5 Bar, and adjust the roller gap blowing nozzle 7 according to the oil content on the material surface, the air pressure is usually set to 0.8-1.0 Bar;

[0062] D: The support roller purge nozzle 6 purges the rolling oil brought from the support roller surface, so that the rolling oil is gasified and diffused to both sides. The roll gap purge nozzle 7 gasifies the rolling oil squeezed out from the roll gap between the upper support roller and the upper working roller and blows it to both sides to prevent the rolling oil from gathering and dripping onto the material surface.

[0063] E: The rolled oil is blown off and drops onto the outlet arc-shaped slide plate 4, then flows along the outlet arc-shaped slide plate 4 to the groove at the bottom, gathers along the groove and drops into the oil collecting tank 8. The oil collecting tank 8 is laterally high in the middle and low on both sides, so that the condensed oil can flow out from both sides after dripping.

[0064] Check the oil content on the surface of the material. No visible oil spots were found within 60 minutes.

[0065] Example 6

[0066] A method for using an aluminum foil rolling mill outlet purge device comprises the following steps:

[0067] A: Open the lifting and retracting cylinder of the roller cleaner 3, and press the roller cleaner blade against the support roller 1. The pressing force can be adjusted and set to 1.0 bar;

[0068] B: After the aluminum foil 9 is threaded through the belt, it falls down the exit arc slide plate 4;

[0069] C: Open the air pressure of the support roller blowing nozzle 6, first adjust the support roller blowing nozzle 6 through the worm, the air pressure is usually 1.0-1.5 Bar, and adjust the roller gap blowing nozzle 7 according to the oil content on the material surface, the air pressure is usually set to 0.8-1.0 Bar;

[0070] D: The support roller purge nozzle 6 purges the rolling oil brought from the support roller surface, so that the rolling oil is gasified and diffused to both sides. The roll gap purge nozzle 7 gasifies the rolling oil squeezed out from the roll gap between the upper support roller and the upper working roller and blows it to both sides to prevent the rolling oil from gathering and dripping onto the material surface.

[0071] E: The rolled oil is blown off and drops onto the outlet arc-shaped slide plate 4, then flows along the outlet arc-shaped slide plate 4 to the groove at the bottom, gathers along the groove and drops into the oil collecting tank 8. The oil collecting tank 8 is laterally high in the middle and low on both sides, so that the condensed oil can flow out from both sides after dripping.

[0072] Check the oil content on the surface of the material. No visible oil spots were found within 90 minutes.

[0073] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An aluminum foil rolling mill outlet purge device, characterized in that: It includes a roller cleaner (3) and a purge device, The roller cleaner (3) comprises: a flexible scraper blade arranged in an "eight" shape, a bracket for mounting the scraper blade, a cylinder for driving the bracket to extend and retract, and a pressure regulating valve, wherein the flexible scraper blade arranged in an "eight" shape is an integrated polyurethane scraper blade with a Shore hardness of 60 to 75 HS; The blowing device comprises: an outlet arc-shaped slide plate (4), a support roller blowing air nozzle (6) and a roll gap blowing air nozzle (7) mounted on the outlet arc-shaped slide plate (4), and an adjusting screw rod (5) for adjusting the directions of the two air nozzles; the support roller blowing air nozzle (6) and the roll gap blowing air nozzle (7) are fan-shaped air nozzles, and the air nozzle widths of the support roller blowing air nozzle (6) and the roll gap blowing air nozzle (7) match the roll surface width, which is 5%-15% of the roll surface width of the rolling mill.

2. The aluminum foil rolling mill outlet purge device according to claim 1, characterized in that: The nozzle widths of the support roller blowing nozzle (6) and the roller gap blowing nozzle (7) are matched with the roller surface width to be 10% of the roller surface width of the rolling mill.

3. The aluminum foil rolling mill outlet purge device according to claim 1, characterized in that: The support roller blowing air nozzle (6) and the roller gap blowing air nozzle (7) are in the shape of arc-shaped flat nozzles.

4. A method for using the aluminum foil rolling mill outlet purge device as described in any one of claims 1 to 3, characterized in that: The following steps are involved: A: Open the lifting and retracting cylinder of the roller cleaner (3) and press the roller cleaner blade against the support roller (1). The pressing force can be adjusted to 0.5-1.5 bar. B: After the aluminum foil (9) is threaded through the belt, it falls down the exit arc slide (4); C: Open the air pressure of the support roller blowing nozzle (6). First, adjust the support roller blowing nozzle (6) through the worm gear. The air pressure is usually 1.0-1.5 Bar. Then, adjust the roller gap blowing nozzle (7) according to the oil content on the material surface. The air pressure is usually set to 0.8-1.0 Bar. D: The support roll purge nozzle (6) purges the rolling oil brought from the support roll surface, vaporizes the rolling oil and diffuses it to both sides. The roll gap purge nozzle (7) vaporizes the rolling oil squeezed out from the roll gap between the upper support roll and the upper working roll and disperses it to both sides to prevent the rolling oil from gathering and dripping onto the material surface. E: The rolled oil dropped onto the outlet arc-shaped slide plate (4), then flows along the outlet arc-shaped slide plate (4) to the groove at the bottom, gathers along the groove and drops into the oil collecting groove (8). The oil collecting groove (8) is laterally shaped to be high in the middle and low on both sides, so that the condensed oil can flow out from both sides after dropping.

5. The method for using the aluminum foil rolling mill outlet purge device according to claim 4, characterized in that: The pressing force adjusted by the lifting and retracting cylinder in step A is set to 1 bar.

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