Aluminum foil rolling process for high peel strength food packaging

Abstract

The invention discloses a rolling process for aluminum foil for food packaging with high peeling strength, comprising the following steps: three first winding shafts are sleeved on each shaft rod to make them temporary winding shafts; the aluminum foil that has not been rolled and rolled is rotated and arranged on an expansion shaft located at a processing input end via a second winding shaft, and the end of the aluminum foil roll located at the input end is introduced into a first rough rolling process; in a multi-pass rolling process, the first winding roller changes from a winding state to an unwinding state, so that the aluminum foil can be automatically loaded and unloaded without disassembling and transferring it, which not only avoids the risk of damage to the aluminum foil during the transfer process and reduces the labor intensity, but also connects the multiple rolling processes of the aluminum foil to form an assembly line, which not only improves the processing speed of the high peeling strength aluminum foil, but also makes the connection of the multiple rolling equipment more compact, and the equipment occupies less space, so as to achieve the purpose of reducing costs and increasing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum foil preparation, and in particular relates to a rolling process of aluminum foil for food packaging with high peeling strength. Background Art

[0002] Aluminum foil, as a thin material directly rolled from pure aluminum, occupies an important position in the food and pharmaceutical packaging industry due to its excellent insulation performance and non-toxic characteristics. In particular, in order to meet the strict requirements of food packaging on quality and safety, aluminum foil with high peel strength came into being, which can more effectively protect food from external influences.

[0003] A Chinese patent with publication number CN106238459A discloses a high peel strength aluminum foil rolling process for food packaging. The process uses a carefully designed multi-pass rolling process - including three rough rollings, one intermediate rolling and one finishing rolling, to finally produce a high peel strength aluminum foil with a thickness precisely controlled in the range of 0.006 to 0.0065 mm. This multi-pass rolling process aims to significantly improve the peel strength of the aluminum foil by gradually refining its structure to meet the needs of high-end food packaging.

[0004] Under the existing technical background, in the process of rolling aluminum foil into a high peel strength, it is inevitable to go through multiple rolling processes, and the aluminum foil needs to be transferred to new rolling equipment after each rolling; therefore, every time the rolling equipment is replaced, the aluminum foil in the previous process needs to be rolled up and transferred, and re-fixed in order to continue the next process; however, due to the high weight and fragile nature of aluminum foil, this transfer process is not easy; it is not only time-consuming and labor-intensive, but also once the aluminum foil is hit by external factors during the transfer process, it is very easy to be partially damaged, thus affecting its subsequent processing and use. Summary of the invention

[0005] The purpose of the present invention is to provide a high peel strength aluminum foil rolling process for food packaging, so as to solve the technical problem that in the prior art, when transferring the aluminum foil in the replacement rolling process of the high peel strength aluminum foil, it is not only time-consuming and labor-intensive, but also easy to be damaged by bumps and collisions due to external factors.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A high peel strength aluminum foil rolling process for food packaging, comprising the following steps:

[0008] S1: three first winding reels are sleeved on each shaft to make them temporary winding reels;

[0009] S2: The unrolled and rolled aluminum foil is rotated and arranged on an expansion shaft located at the processing input end via a second winding shaft;

[0010] S3: introducing the end of the aluminum foil roll at the input end into the first rough rolling process, performing the first rough rolling on it by using the rough rolling equipment, and rolling it up to the first first winding shaft at the rear, and the first motor cooperates with the third motor to roll up the aluminum foil roll after the first rough rolling process;

[0011] S4: The second motor makes the three first winding shafts on the same shaft move axially synchronously through the cooperation of the movable frame and the push block, so as to move the first winding roller wound with the aluminum foil roll, and change the winding into unwinding. At the same time, the outermost first winding roller that has completed the unwinding of the aluminum foil is pushed to the outside of the magnetic core, so that it loses the magnetic attraction of the magnetic core and falls to the ground;

[0012] S5: After the second motor resets the push block, a first winding shaft is selected again and is adsorbed on the shaft by the magnetic attraction provided by the magnetic core;

[0013] S6: The shaft is driven to rotate again by the first motor, and the aluminum foil roll that has completed the first rough rolling process is unwound to the second rough rolling process by the shaft, and its end is introduced to the next first winding shaft at the rear, and the first motor located here cooperates with the first motor in the previous process to rewind the aluminum foil roll that has completed the second rough rolling process;

[0014] S7: Repeat S4, S5 and S6, so that the aluminum foil roll completes the subsequent third rough rolling, intermediate rolling and finishing rolling processes in sequence to obtain a high peel strength aluminum foil roll.

[0015] Preferably, in S1, the magnetic attraction provided by the magnetic core inside the non-magnetic shaft is used to close the two semicircular shells to form a first winding shaft and adsorb them on the shaft, and the inner diameter of the formed first winding shaft is the same as the outer diameter of the shaft.

[0016] Preferably, in S2, the expansion shaft located at the processing input end unwinds the unrolled aluminum foil, and the expansion shaft located at the processing output end rewinds the fully rolled aluminum foil, and a third motor is used to provide the expansion shaft with power for unwinding and rewinding.

[0017] Preferably, in S3, the first motor provides circumferential rotational force to the shaft by utilizing the cooperation between the slide groove on the shaft and the convex strip on the first winding shaft, and cooperates with the third motor to reel up the aluminum foil roll after the first rough rolling process.

[0018] Preferably, in S4, the length of the magnetic core is three times the length of the first winding axis.

[0019] Preferably, in S4, the second motor moves the movable frame axially through the screw rod, and the movable frame then uses the push block to move the first winding shaft axially in sequence; the screw rod, the first winding shaft and the movable frame are of equal length.

[0020] Preferably, in S5, the length of the shaft rod is the sum of the lengths of the four first winding shafts and the length of the push block.

[0021] Preferably, in S5, after the second motor resets the push block, an unrolled aluminum foil roll is selectively added to the expansion shaft located at the input end or not.

[0022] Preferably, in S5, the first winding shaft that is again sleeved is adsorbed on one end close to the second motor.

[0023] Preferably, in S7, after the high peel strength aluminum foil roll is obtained, it is rolled up by the cooperation of the first winding shaft and the third motor located at the output end, and then removed and transferred.

[0024] Beneficial effects of the present invention:

[0025] 1) In the multi-pass rolling process of the present invention, the first winding roller changes from a winding state to an unwinding state, so that the aluminum foil can be automatically loaded and unloaded without the need to disassemble and transfer it, which not only avoids the risk of damage to the aluminum foil during the transfer process and reduces labor intensity, but also connects the multiple rolling processes of the aluminum foil to form an assembly line, which not only improves the processing speed of the high peeling strength aluminum foil, but also makes the connection of the multiple rolling equipment more compact, and the equipment occupies less space, thereby achieving the purpose of reducing costs and increasing efficiency.

[0026] 2) The present invention utilizes the cooperation between the connector and the pin, so that the operator can directly remove the expansion shaft when installing the second winding shaft on the expansion shaft, and then put the expansion shaft into the opening on the frame after the expansion shaft and the second winding shaft are fixed, so that the expansion shaft is connected to the output end of the motor, thereby completing the installation before the aluminum foil is rolled and the collection and transfer after the aluminum foil is rolled, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a top view of the present invention;

[0030] Figure 3 is an exploded view of the present invention;

[0031] Figure 4 It is a schematic diagram of the connector structure in the present invention;

[0032] Figure 5 is a cross-sectional view of the shaft rod structure of the present invention;

[0033] Figure 6 yes Figure 5A partial enlarged view of the middle A;

[0034] Figure 7 It is a schematic diagram of the first winding shaft structure in the present invention.

[0035] In the figure: 1. bracket; 2. shaft; 3. magnetic core; 4. first winding shaft; 5. convex strip; 6. slide groove; 7. first fixed frame; 8. first motor; 9. second fixed frame; 901. second motor; 903. push block; 904. screw rod; 10. frame; 1001. third fixed frame; 1002. third motor; 1003. second winding shaft; 1004. expansion shaft; 1005. connector; 1006. pin; 11. limit frame; 12. guide roller. DETAILED DESCRIPTION

[0036] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 2 as well as Figure 4 As shown, a high peel strength aluminum foil rolling process for food packaging includes a frame 10 for winding and a frame 10 for unwinding, the frame 10 is composed of two vertical plates and a horizontal plate, and the upper center of the vertical plate is open; a rotatably connected expansion shaft 1004 is detachably provided at the top of the frame 10 corresponding to the opening; a third fixed frame 1001 is fixedly provided at a position corresponding to the side of the frame 10; a third motor 1002 is fixedly provided on the third fixed frame 1001; a connector 1005 is fixedly connected to the output end of the third motor 1002, and the connector 1005 is a rectangular structure, and the end of the expansion shaft 1004 is arranged inside the rectangular structure; a pin 1006 is penetrated through the connector 1005, and the connector 1005 is connected to the expansion shaft 1004 via the pin 1006; a second winding shaft 1003 is fixedly sleeved on the expansion shaft 1004, and the second winding shaft 1003 is used for winding or unwinding aluminum foil.

[0038] By utilizing the cooperation of the connector 1005 and the pin 1006, the operator can directly remove the expansion shaft 1004 when installing the second winding shaft 1003 on the expansion shaft 1004, and after the expansion shaft 1004 and the second winding shaft 1003 are fixed, put it into the opening on the frame 10 to connect the expansion shaft 1004 to the output end of the motor, thereby completing the installation before the rolling of the aluminum foil and the collection and transfer after the rolling of the aluminum foil, which is convenient and quick.

[0039] Please refer again Figure 1or Figure 2 As shown, a plurality of continuous rolling mechanisms (two in this embodiment) are arranged between a frame 10 for winding and a frame 10 for unwinding, and adjacent continuous rolling mechanisms are arranged centrally symmetrically and are provided with aluminum foil rolling equipment (not shown in the figure), and the continuous rolling mechanisms are used to transfer the rolled aluminum foil coils.

[0040] Please refer again Figure 3 , Figure 4 as well as Figure 6 As shown, the continuous rolling mechanism includes a symmetrically arranged bracket 1; a shaft 2 is rotatably connected to the bracket 1; a first fixing frame 7 is fixedly arranged at one end of the shaft 2; a first motor 8 is fixedly arranged on the first fixing frame 7, and the output end of the first motor 8 is connected to the shaft 2 for driving the shaft 2 to rotate.

[0041] Please refer again Figure 3 As shown, three detachable first winding shafts 4 are sleeved on the shaft 2, and the first winding shafts 4 are composed of two semicircular shells, and the inner diameter of the circle formed after closing is the same as the outer diameter of the shaft 2; the shaft 2 is made of non-magnetic material, and the surface is polished and smooth. The stainless steel with the grade of 0Cr17Ni12Mo2 in accordance with the national standard GB / T 1220-2007 can be selected; a magnetic core 3 is arranged at one end of the inner core of the shaft 2 away from the first motor 8, and the magnetic core 3 can be an electromagnet or a permanent magnet, and the length of the magnetic core 3 is three times the length of the first winding shaft 4; symmetrically arranged convex strips 5 are fixedly connected to the outside of the shaft 2 corresponding to the position of the magnetic core 3; two semicircular shells of the first winding shaft 4 are provided with sliding grooves 6 corresponding to the position of the convex strips 5, and the first winding shaft 4 is sleeved on the shaft 2 through the magnetic core 3, and the cooperation between the convex strips 5 and the sliding grooves 6 realizes that the first winding shaft 4 is driven to rotate synchronously when the shaft 2 rotates; the length of the shaft 2 is the sum of the lengths of the four first winding shafts 4 and the length of the push block 903.

[0042] By utilizing the cooperation between the magnetic core 3 inside the shaft 2 and the first winding shaft 4, the first winding shaft 4 can be firmly adsorbed on the shaft 2 to form a temporary winding shaft for the aluminum foil. During the rolling process of the aluminum foil using the aluminum foil rolling equipment, the first motor 8 is cooperated to complete the winding and unwinding of the aluminum foil. Then, the second motor 901 and the push block 903 are cooperated to realize the automatic disassembly of the first winding shaft 4, and the installation of the first winding shaft 4 is completed manually, thereby connecting multiple aluminum foil rolling processes.

[0043] Through the cooperation of the convex strip 5 and the slide groove 6, the first winding shaft 4 can follow the shaft rod 2 to perform circumferential rotation, so that the winding and unwinding can be completed.

[0044] Please refer again Figure 3As shown, a second fixing frame 9 is fixedly provided at one end of the shaft rod 2 away from the first motor 8, and a second motor 901 is fixedly provided on the second fixing frame 9; a screw rod 904 is connected to the output end of the second motor 901, and the length of the screw rod 904 is equal to the length of the first winding shaft 4, and the other end of the screw rod 904 is rotatably provided on the bracket 1; a push block 903 is slidably provided at one end of the shaft rod 2 close to the second motor 901, and the push block 903 is composed of a ring block and two T-shaped blocks; a movable frame 902 with the same length as the first winding shaft 4 is rotatably connected to the screw rod 904, and the movable frame 902 presents a U-shaped structure, and the movable frame 902 is connected to the T-shaped block on the push block 903.

[0045] Please refer again Figure 1 or Figure 2 As shown, symmetrically arranged limit frames 11 are fixedly provided at positions corresponding to both sides of the continuous rolling mechanism, and a guide roller 12 is rotatably connected to the upper end of the limit frame 11. The guide roller 12 is used to guide the moving direction of the aluminum foil, so as to facilitate the rolling equipment to roll and reel the aluminum foil.

[0046] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below:

[0047] like Figure 2 As shown, first, the unrolled aluminum foil roll B1 is set on the frame 10 located at the input end by using the second winding shaft 1003, and then the end of the aluminum foil roll B1 is introduced into the corresponding first winding shaft 4 on the shaft 2, and then the second winding shaft 1003 (referring to the second winding shaft 1003 located at the input end) and the first winding shaft 4 are driven to rotate by the corresponding first motor 8 and the third motor 1002, so that the aluminum foil roll B1 on the second winding shaft 1003 passes through the rolling equipment in the initial rolling process, and the aluminum foil roll B1 is roughly rolled by the rolling equipment, and then rolled on the first winding shaft 4 to form an aluminum foil roll B2, and the first rolling process of the aluminum foil roll is completed at this time.

[0048] Thereafter, the second motor 901 is used to drive the screw rod 904 to rotate, and the screw rod 904 drives the movable frame 902 to translate. Then the movable frame 902 pushes the three first winding shafts 4 located on the shaft 2 to move synchronously through the push block 903. At this time, the aluminum foil roll B2 becomes the aluminum foil roll B3. When the outermost first winding shaft 4 translates to the outside of the magnetic core 3, the first winding shaft 4 loses the suction force applied to it by the magnetic core 3 and separates again and falls to the ground. Then the push block 903 is reset by the second motor 901. At this time, the operator installs another first winding shaft 4 on the shaft 2 (the opposite end of the first winding shaft 4 that has been detached as mentioned above) by using the suction force applied to it by the magnetic core 3. The end of the aluminum foil roll B3 is introduced into the first winding shaft 4 on the next continuous rolling mechanism to form an aluminum foil roll B4. After completion, the second motor 901 and the third motor 1002 can be directly started to complete the rolling of the next aluminum foil roll, or an unrolled aluminum foil roll can be set on the frame 10 located at the input end and then the second motor 901 and the third motor 1002 can be run to roll the aluminum foil roll together with the previous aluminum foil roll, and then the above-mentioned same operation is repeated to turn the aluminum foil roll B4 into an aluminum foil roll B5, and finally it is wound onto the second winding shaft 1003 located on the input end frame 10 to form an aluminum foil roll B6, which can be disassembled to complete the preparation of high peel strength aluminum foil.

[0049] As can be seen from the above, during the rolling process of the aluminum foil roll (in this embodiment), the aluminum foil roll B1 to the aluminum foil roll B2, the aluminum foil roll B3 to the aluminum foil roll B4, and the aluminum foil roll B5 to the aluminum foil roll B6 have all completed one corresponding aluminum foil rolling process; from the aluminum foil roll B2 to the aluminum foil roll B3, and from the aluminum foil roll B4 to the aluminum foil roll B5, a state change has been completed, that is, the first winding roller changes from the winding state to the unwinding state. After the state change, the aluminum foil can be automatically loaded and unloaded during the rolling process of multiple processes (and the winding and unwinding of the aluminum foil on the same shaft 2 are completed by the same direction drive of the first motor 8), without the need to disassemble and transfer it, which not only avoids the risk of damage to the aluminum foil during the transfer process and reduces the labor intensity, but also connects the multiple rolling processes of the aluminum foil to form an assembly line, which not only improves the processing speed of the high peeling strength aluminum foil, but also makes the connection of the multiple rolling equipment more compact, and the equipment occupies less space, thereby achieving the purpose of reducing costs and increasing efficiency.

[0050] The rolling process of aluminum foil for high peel strength food packaging comprises the following steps:

[0051] S1: The operator uses the magnetic attraction provided by the magnetic core inside the shaft to set the first winding reel on the shaft, making it a temporary winding reel and preparing for the rolling of the high peel strength aluminum foil;

[0052] S2: The unrolled and wound aluminum foil is rotated by the second winding shaft and arranged on the expansion shaft located at the processing input end, and the third motor here is used to provide the power for unwinding;

[0053] S3: introducing the end of the aluminum foil roll at the input end into the first rough rolling process, performing the first rough rolling on it by using the rough rolling equipment, and rolling it up to the first first winding shaft at the rear, and the first motor cooperates with the third motor to roll up the aluminum foil roll after the first rough rolling process;

[0054] S4: The second motor makes the three first winding shafts on the same shaft move axially synchronously through the cooperation of the movable frame and the push block, so as to move the first winding roller wound with the aluminum foil roll, and change the winding into unwinding. At the same time, the outermost first winding roller that has completed the unwinding of the aluminum foil is pushed to the outside of the magnetic core, so that it loses the magnetic attraction of the magnetic core and falls to the ground;

[0055] S5: After the second motor resets the push block, the operator selects a second winding shaft and attaches it to the shaft using the magnetic attraction provided by the magnetic core;

[0056] At the same time, an unrolled aluminum foil coil can be optionally added or not added to the expansion shaft at the input end;

[0057] S6: The first motor is used to drive the shaft to rotate again, and the shaft located at this position is used to input the aluminum foil roll that has completed the first rough rolling process into the second rough rolling process, and its end is introduced into the next first winding shaft at the rear, and the first motor located here cooperates with the first motor in the previous process to rewind the aluminum foil roll that has completed the second rough rolling process;

[0058] S7: repeating S4, S5 and S6, so that the aluminum foil roll sequentially completes the subsequent third rough rolling, intermediate rolling and finishing rolling processes to obtain a high peel strength aluminum foil roll;

[0059] S8: The first winding shaft and the third motor located at the output end are used to complete the winding, and then the first winding shaft and the third motor are used to complete the winding, and then the first winding shaft and the third motor are used to complete the winding.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high peel strength aluminum foil rolling process for food packaging, characterized in that: The following steps are involved: S1: three first winding shafts (4) are sleeved on each shaft (2) to make them temporary winding shafts; two semicircular shells are closed together to form a first winding shaft (4) and adsorbed on the shaft (2) by using the magnetic attraction provided by the magnetic core (3) inside the non-magnetic shaft (2); the inner diameter of the formed first winding shaft (4) is the same as the outer diameter of the shaft (2); S2: The unrolled and rolled aluminum foil is rotated and arranged on an expansion shaft (1004) located at the processing input end via a second winding shaft (1003); the expansion shaft (1004) located at the processing input end unwinds the unrolled aluminum foil, and the expansion shaft (1004) located at the processing output end rewinds the fully rolled aluminum foil, and the third motor (1002) is used to provide the expansion shaft (1004) with power for unwinding and rewinding; S3: introducing the end of the aluminum foil roll at the input end into the first rough rolling process, performing the first rough rolling on it using the rough rolling equipment, and rolling it onto the first first winding shaft (4) at the rear, and the first motor (8) cooperates with the third motor (1002) to roll up the aluminum foil roll after the first rough rolling process; utilizing the cooperation of the slide groove (6) on the shaft (2) and the convex strip (5) on the first winding shaft (4) so ​​that the first motor (8) provides a circumferential rotation force for the shaft (2), and cooperates with the third motor (1002) to roll up the aluminum foil roll after the first rough rolling process; S4: The second motor (901) causes the three first winding shafts (4) on the same shaft (2) to move axially synchronously through the cooperation of the movable frame (902) and the push block (903), and while causing the first winding roller wound with the aluminum foil roll to move and change winding into unwinding, the outermost first winding roller that has completed unwinding the aluminum foil is also pushed to the outside of the magnetic core (3), causing it to lose the magnetic attraction of the magnetic core (3) and fall to the ground; the second motor (901) causes the movable frame (902) to move axially through the screw rod (904), and the movable frame (902) then uses the push block (903) to cause the first winding shafts (4) to move axially in sequence; the screw rod (904), the first winding shafts (4) and the movable frame (902) are of equal length; S5: After the second motor (901) resets the push block (903), a first winding shaft (4) is selected again and adsorbed onto the shaft (2) by using the magnetic attraction provided by the magnetic core (3); S6: the shaft (2) is driven to rotate again by the first motor (8), and the aluminum foil roll that has completed the first rough rolling process is unwound by the shaft (2) to the second rough rolling process, and its end is introduced onto the next first winding shaft (4) at the rear, and the first motor (8) located here cooperates with the first motor (8) in the previous process to rewind the aluminum foil roll that has completed the second rough rolling process; S7: Repeat S4, S5 and S6, so that the aluminum foil roll completes the subsequent third rough rolling, intermediate rolling and finishing rolling processes in sequence to obtain a high peel strength aluminum foil roll.

2. The high peel strength aluminum foil rolling process for food packaging according to claim 1, characterized in that: In S4, the length of the magnetic core (3) is three times the length of the first winding shaft (4).

3. The high peel strength aluminum foil rolling process for food packaging according to claim 1, characterized in that: In the above-mentioned S5, the length of the shaft rod (2) is the sum of the lengths of the four first winding shafts (4) and the length of the push block (903).

4. The high peel strength aluminum foil rolling process for food packaging according to claim 1, characterized in that: In S5, after the second motor (901) resets the push block (903), an unrolled aluminum foil roll is selectively added to the expansion shaft (1004) located at the input end or not.

5. The high peel strength aluminum foil rolling process for food packaging according to claim 1, characterized in that: In S5, the first winding shaft (4) is again mounted and adsorbed on one end close to the second motor (901).

6. The high peel strength aluminum foil rolling process for food packaging according to claim 1, characterized in that: In S7, after the high peel strength aluminum foil roll is obtained, it is rolled up by using the cooperation of the first winding shaft (4) and the third motor (1002) located at the output end, and then removed and transferred.

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