Control method for solving gap of aluminum foil roll

Abstract

The invention discloses a control method for solving the problem of gaps in an aluminum foil roll. The control method comprises the steps that S1, the slit aluminum foil roll is placed on a pouring platform; s2, the metal material penetrating rod is sleeved with two wedge-shaped metal lantern rings with the length ranging from 10 cm to 20 cm in a penetrating mode; s3, a metal material penetrating rod with two metal lantern rings penetrates into the steel pipe core of the aluminum foil roll in the S1, the positions of the metal lantern rings on the metal material penetrating rod are adjusted, and the two metal lantern rings are symmetrically supported at the two ends in the steel pipe core; and S4, the aluminum foil roll is subjected to subsequent production procedures. The two symmetrical metal lantern rings are additionally arranged at the designated positions of the metal material penetrating rod, the metal lantern rings enable the main stress positions of the metal material penetrating rod and the steel pipe core to move into the aluminum foil coil, the purposes of reducing deformation of the steel pipe core and the aluminum coil and eliminating gaps in the bottom of the aluminum coil are achieved, and operation is easy and convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of ultra-thin aluminum foil production, and in particular relates to a control method for solving the problem of gaps in an aluminum foil roll. Background Art

[0002] Aluminum foil has the advantages of moisture-proof, airtight, light-shielding, abrasion-resistant, fragrance-preserving, non-toxic and tasteless. At present, domestic and foreign aluminum foil, especially double-zero aluminum foil products, mainly use 1000 and 8000 series aluminum alloys (such as 1235, 8111, 8079 and other alloys), which are used in food fields such as milk, beverages, drinks, solid food, pharmaceutical packaging fields such as capsules, tablets, syringes, and packaging, heat insulation, and construction of electronic components.

[0003] The production process of aluminum foil is usually "blank - cold rolling - foil rolling - slitting - annealing - packaging". After the aluminum foil is rolled to the target thickness, it needs to be slit according to the number of meters required by the customer's order and wound on a steel tube core. Products with an order of 20,000 to 80,000 meters need to be wound on a steel tube core with an inner diameter of 150 to 152 mm and a wall thickness of 4 to 8 mm. The width of the aluminum foil roll is generally 1000 to 1880 mm, and the heaviest single roll of aluminum foil can weigh about 1.8 tons.

[0004] After slitting, the aluminum foil roll is threaded with a metal threading rod and placed on the annealing frame, and then put into the annealing furnace for annealing. The annealing temperature is usually 190-250℃, and the annealing time is 30-400 hours. After annealing, it is cooled for 48-72 hours before packaging. In addition to the production site turnover time, the aluminum foil roll stays on the threading rod for up to 30 days.

[0005] Under the action of the weight of the aluminum foil roll, the rod will bend downward elastically, and the stress points between the steel tube core and the rod are concentrated at the two ends, point A and point B. Figure 1 When placed for a long time, the steel tube core wrapped with aluminum foil roll will also bend downward, especially at the edge, causing a gap of 5 to 60 mm below the aluminum foil roll near the steel tube core. Figure 2 The gaps in the aluminum foil roll will cause oxidation and adhesion on the surface of the aluminum foil due to the large amount of air entering, which will cause the aluminum foil roll to be unable to unfold normally during use, resulting in broken strips; the bending of the two ends of the steel tube core will also cause the aluminum roll to shake up and down during the unfolding process, resulting in quality problems such as compound wrinkling. Summary of the invention

[0006] The purpose of the present invention is to provide a control method for solving the problem of gaps in aluminum coils, so as to solve the problem of gaps in aluminum foil coils caused by deformation of steel tube cores and aluminum foil coils in the prior art.

[0007] In order to achieve the above object, the technical solution of the present invention is:

[0008] A control method for solving the problem of gaps in an aluminum foil roll according to the present invention is characterized in that:

[0009] S1. Place the slit aluminum foil roll on the unloading platform;

[0010] S2. Put two wedge-shaped metal rings with a length of 10 to 20 cm on the outside of the metal rod; the hardness and heat resistance of the metal rings should not be lower than that of the metal rod, but the deformation caused by heat and force should not be greater than that of the metal rod;

[0011] S3, inserting a metal threading rod with two metal rings into the steel tube core of the aluminum foil roll of S1, adjusting the position of the metal rings on the metal threading rod so that the two metal rings are symmetrically supported at both ends of the steel tube core;

[0012] S4, the aluminum foil roll can be subjected to subsequent production processes.

[0013] Preferably, the inner diameter of the steel tube core of the aluminum foil roll is 150-152 mm.

[0014] Preferably, the outer diameter of the metal feeder rod is 60-100 mm; the inner diameter of the metal ring should be adapted to the outer diameter of the metal feeder rod so that it can be smoothly inserted into the outer surface of the metal feeder rod, with a wall thickness of 2-5 mm.

[0015] Preferably, the metal ring is a wedge-shaped metal ring with a minimum wall thickness of 2 mm, and an angle between the inclined edge of the wedge and the horizontal plane of 0.5° to 2° (preferably 1° to 1.5°); when it is put on the outside of the metal threading rod, the end with a smaller outer diameter faces outward.

[0016] Preferably, the distance a between the outer end face of each of the metal rings and the corresponding end face of the aluminum foil roll is 20% to 30% of the width of the aluminum foil roll, and more preferably 24% to 27%.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention adds two symmetrical metal rings at designated positions on the metal feed rod. The metal rings move the main force-bearing positions of the metal feed rod and the steel tube core to the inside of the aluminum foil roll and are within a specific range of the width of the aluminum foil roll, thereby dispersing the gravity borne by the metal feed rod and the steel tube core, thereby achieving the purpose of reducing the deformation of the steel tube core and the aluminum roll and eliminating the gap at the bottom of the aluminum roll. In particular, when a wedge-shaped metal ring is used, the gravity deformation borne by the center of the steel tube core can be further reduced. When the metal ring is deformed in an irreversible manner, it can be replaced, which greatly reduces the deformation and replacement frequency of the metal feed rod and reduces the production cost. In addition, the present invention is simple and convenient to operate, significantly improves product quality, and has obvious advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the forces acting on the existing steel tube core and the metal feed rod.

[0020] Figure 2 A photo of the gap between the aluminum foil rolls under the existing steel pipe core.

[0021] Figure 3 Schematic diagram of the positions of the steel tube core and the metal feed rod in Example 1 of the present invention.

[0022] Figure 4 It is a cross-sectional schematic diagram of a wedge-shaped metal ring being passed through a metal threading rod.

[0023] Figure 5 Schematic diagram of the forces acting on the steel tube core and the metal feed rod in Example 2 of the present invention. DETAILED DESCRIPTION

[0024] Those skilled in the art should recognize that the present embodiment is only used to illustrate the present invention, and is not used to limit the present invention. Any changes or modifications to the embodiment within the scope of the present invention are within the scope of the claims of the present invention.

[0025] Example 1

[0026] A control method for solving the problem of gaps in an aluminum foil roll comprises the following steps:

[0027] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1281 mm, the weight is 1.025 tons, and the inner diameter of the steel tube core is 150 mm.

[0028] S2. Two metal rings (inner diameter 76mm, wall thickness 2mm) with a length of 10cm are inserted on the outer surface of the metal rod (outer diameter 75mm, wall thickness 8mm); the metal rings and the metal rod are made of 9Cr18 stainless steel;

[0029] S3. Insert the metal rod with two metal rings into the steel tube core of the aluminum foil roll, adjust the position of the metal rings on the metal rod so that the two metal rings are symmetrically supported at both ends of the steel tube core, and the distance a between the outer end face of each metal ring and the corresponding end face of the aluminum foil roll is 310 mm (i.e. 24.2% of the width of the aluminum foil roll, see attached Figure 3 ); and then the aluminum foil roll is subjected to subsequent production processes.

[0030] During packaging, an inspection is carried out to ensure that there are no gaps in the aluminum foil roll under the steel tube core.

[0031] Comparative Example 1

[0032] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1281 mm, the weight is 1.025 tons, and the inner diameter of the steel tube core is 150 mm.

[0033] S2. Insert the metal rod (outer diameter 75mm, wall thickness 8mm) into the steel tube core of the aluminum foil coil and put it into the annealing frame; then carry out the subsequent production process for the aluminum foil coil.

[0034] During packaging, inspection was carried out and it was found that there were obvious gaps at 5mm and 13mm of the aluminum foil roll under the steel tube core. There was a small amount of oxidation adhesion at the gaps, indicating that gaps are likely to occur on the aluminum foil roll under the steel tube core when the metal ring is not used.

[0035] Example 2

[0036] A control method for solving the problem of gaps in an aluminum foil roll comprises the following steps:

[0037] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1625 mm, the weight is 1.892 tons, and the inner diameter of the steel tube core is 150 mm.

[0038] S2. Put two 15cm long wedge-shaped metal rings (inner diameter 76mm, minimum wall thickness 3mm, the angle between the inclined edge of the wedge and the horizontal plane is 1.2°) on the outer surface of the metal rod (outer diameter 75mm, wall thickness 8mm), with the end with the smaller outer diameter facing outwards, see attached. Figure 4 ; The metal rod is made of ordinary carbon steel, and the wedge-shaped metal ring is made of 9Cr18 stainless steel;

[0039] S3. Insert the metal rod with two wedge-shaped metal rings into the steel tube core of the aluminum foil roll, adjust the position of the metal rings on the metal rod so that the two metal rings are symmetrically supported at both ends of the steel tube core, and the distance a between the outer end face of each metal ring and the corresponding end face of the aluminum foil roll is 402 mm (i.e., 24.7% of the width of the aluminum foil roll, see attached Figure 5 ); and then the aluminum foil roll is subjected to subsequent production processes.

[0040] During packaging, an inspection is carried out to ensure that there are no gaps in the aluminum foil roll under the steel tube core.

[0041] Example 3

[0042] A control method for solving the problem of gaps in an aluminum foil roll comprises the following steps:

[0043] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1350 mm, the weight is 1.293 tons, and the inner diameter of the steel tube core is 150 mm.

[0044] S2. Put two 10cm long wedge-shaped metal rings (inner diameter 76mm, minimum wall thickness 2mm, angle between the inclined edge of the wedge and the horizontal plane is 1.1°) on the outer surface of the metal rod (outer diameter 75mm, wall thickness 8mm), with the end with smaller outer diameter facing outward; the metal rod is made of ordinary carbon steel, and the wedge-shaped metal ring is made of 9Cr18 stainless steel;

[0045] S3. Insert the metal threading rod with two wedge-shaped metal rings into the steel tube core of the aluminum foil roll, adjust the position of the metal rings on the metal threading rod, so that the two metal rings are symmetrically supported at both ends of the steel tube core, and the distance a between the outer end face of each metal ring and the corresponding end face of the aluminum foil roll is 330 mm (i.e., 24.4% of the width of the aluminum foil roll); then carry out subsequent production processes for the aluminum foil roll.

[0046] During packaging, an inspection is carried out to ensure that there are no gaps in the aluminum foil roll under the steel tube core.

[0047] Example 4

[0048] A control method for solving the problem of gaps in an aluminum foil roll comprises the following steps:

[0049] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1511 mm, the weight is 1.795 tons, and the inner diameter of the steel tube core is 152 mm.

[0050] S2. Put two 10cm long wedge-shaped metal rings (inner diameter 76mm, minimum wall thickness 2mm, angle between the inclined edge of the wedge and the horizontal plane is 1.4°) on the outer surface of the metal rod (outer diameter 75mm, wall thickness 8mm), with the end with smaller outer diameter facing outward; the metal rod is made of ordinary carbon steel, and the wedge-shaped metal ring is made of 9Cr18 stainless steel;

[0051] S3. Insert the metal threading rod with two wedge-shaped metal rings into the steel tube core of the aluminum foil roll, adjust the position of the metal rings on the metal threading rod, so that the two metal rings are symmetrically supported at both ends of the steel tube core, and the distance a between the outer end face of each metal ring and the corresponding end face of the aluminum foil roll is 370 mm (i.e., 24.5% of the width of the aluminum foil roll); then carry out subsequent production processes for the aluminum foil roll.

[0052] During packaging, an inspection is carried out to ensure that there are no gaps in the aluminum foil roll under the steel tube core.

[0053] Comparative Example 2

[0054] S1. Place the slit aluminum foil roll on the unloading platform. The width of the aluminum foil roll is 1511 mm, the weight is 1.795 tons, and the inner diameter of the steel tube core is 152 mm.

[0055] S2. Put two 10cm long metal rings (inner diameter 76mm, wall thickness 2mm) on the outer surface of the metal rod (outer diameter 75mm, wall thickness 8mm); the metal rod is made of ordinary carbon steel, and the wedge-shaped metal ring is made of 9Cr18 stainless steel;

[0056] S3. Insert the metal rod with two metal rings into the steel tube core of the aluminum foil roll, adjust the position of the metal rings on the metal rod so that the two metal rings are symmetrically supported at both ends of the steel tube core, and the distance a between the outer end face of each metal ring and the corresponding end face of the aluminum foil roll is 370 mm (i.e. 24.5% of the width of the aluminum foil roll, see attached Figure 3 ); and then the aluminum foil roll is subjected to subsequent production processes.

[0057] During packaging, a slight gap was found at 7mm thickness of the aluminum foil roll under the steel tube core. Comparison between Example 4 and Comparative Example 2 shows that when a metal ring with uniform thickness is used, if the weight of the aluminum foil roll is large, a slight gap may still be formed in the aluminum foil roll, while when a wedge-shaped metal ring is used, the center of the aluminum foil roll steel tube core is also effectively supported, and the gravity is compensated, so that no gap will be formed in the aluminum foil roll under the steel tube core.

Claims

1. A control method for solving the problem of gaps in an aluminum foil roll, characterized in that: S1. Place the slit aluminum foil roll on the unloading platform; S2. Put two wedge-shaped metal rings with a length of 10 to 20 cm on the outside of the metal rod; the hardness and heat resistance of the metal rings should not be lower than that of the metal rod, but the deformation caused by heat and force should not be greater than that of the metal rod; S3, inserting a metal threading rod with two metal rings into the steel tube core of the aluminum foil roll of S1, adjusting the position of the metal rings on the metal threading rod so that the two metal rings are symmetrically supported at both ends of the steel tube core; S4, the aluminum foil roll can be subjected to subsequent production processes.

2. The control method for solving the problem of gaps in aluminum foil rolls according to claim 1 is characterized in that: The inner diameter of the steel tube core of the aluminum foil roll is 150-152 mm.

3. The control method for solving the problem of gaps in aluminum foil rolls according to claim 1 is characterized in that: The outer diameter of the metal feed rod is 60-100 mm; the inner diameter of the metal ring should be adapted to the outer diameter of the metal feed rod so that it can be smoothly inserted into the outer surface of the metal feed rod, with a wall thickness of 2-5 mm.

4. The control method for solving the problem of gaps in aluminum foil rolls according to claim 1 is characterized in that: The metal collar is a wedge-shaped metal collar with a minimum wall thickness of 2 mm and an angle between the inclined edge of the wedge and the horizontal plane of 0.5° to 2°. When the metal collar is sleeved outside the metal threading rod, the end with a smaller outer diameter faces outward.

5. The control method for solving the problem of gaps in the aluminum foil roll according to claim 4 is characterized in that: The angle between the inclined side of the wedge and the horizontal plane is 1° to 1.5°.

6. The control method for solving the problem of gaps in aluminum foil rolls according to claim 1 is characterized in that: The distance a between the outer end surface of each metal ring and the corresponding end surface of the aluminum foil roll is 20% to 30% of the width of the aluminum foil roll.

7. The control method for solving the problem of gaps in aluminum foil roll according to claim 1 is characterized in that: The distance a between the outer end surface of each metal ring and the corresponding end surface of the aluminum foil roll is 24% to 27% of the width of the aluminum foil roll.

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