Cold Casting Aluminum Mill Finish Rolls for Roofing Sheet Coils

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Cans cover (ring) pre-coated plates
First, the raw materials
Aluminum lid and pull the main substrate of aluminum from the southwest andNanshan Aluminum, the use of aluminum-magnesium alloy 5182H19, 5052H19. Itsproducts in the normal substrates of manganese and magnesium components addedto increase the tensile strength and elongation. Han and the lotion by theGerman food-grade chrome HD agent, the United States PPG epoxy phenolicpackaging coatings, and high-end DOS oil
Second, applications
Division I professional production of DOS card and aluminum cans with a coatingfor cans of the lid and pull the coated aluminum is widely used in beverage,beer, rice pudding, tea, cigarettes, cans and other products packaging. U.S.imports of food ash using electrostatic spray wax, cut by large waves, transverseshear, longitudinal easily processed into the system covered the pre-coatedaluminum manufacturers. Depending on the system covers equipment can makeweight and volume of different specifications to meet customer requirements.
Third, the application prospect
Cans of food packaging as lightweight, unbreakable, easy to carry transportcharacteristics, cans packaged foods will gradually replace the glass packagingfood. As China'seconomy continues to strengthen, improve people's living standards, consumptionwill be more and more cans, cans will be growing timber. Therefore, cans withthe amount of pre-coated aluminum coil will be more and more broad prospects.

Alloy & specification

Alloy^a	Coated panel,strip status	Status	Aluminum thickness^at/mm	Aluminum Specification^a /mm		Aluminum coil specification^a /mm
				Width	length	width	Steeve Φ
5052、5182	H46、H48、H49	H18、H19、 H36、H38、H39	0.22≤t≤0.50	500～1600	500～4000	20～1600	300、350、 405、505
a.Other alloy, specification of material can be negotiated

Aluminum thickness

Aluminum thickness	Thickness tolerance（±）
＞0.22～0.30	0.005
＞0.30～0.50	0.008

Width and Length

Alloy	Aluminum panel&coil length tolerance/mm		Aluminum Panel & coil width tolerance/mm /mm
	Aluminum panel&coil length tolerance/mm		Pop top		Pop can cover
	Length≤2000	Length >2000	width≤100	width >100	width≤1000	width >1000
5052 5182	+1 0	+2 0	±0.2	+1.5 0	+1.0 0	+1.5 0

Dynamic features

Alloy	Status	thickness（t）/mm	Room temperature tensile test results
			Tensile strength R_m/MPa	non-proportional extension strengthR_p0.2/MPa	elongationA_50mm /%
			≥
5052	H36	＞0.22～0.30	255～305	200	2
	H36	＞0.30～0.50	255～305	200	3
	H18、H38	＞0.22～0.30	270	210	2
	H18、H38	＞0.30～0.50	270	210	3
	H19、H39	＞0.22～0.30	290	220	2
	H19、H39	＞0.30～0.50	290	220	3
5182	H36	＞0.22～0.30	265～340	270	3
	H36	＞0.30～0.50	265～340	270	4
	H18、H38	＞0.22～0.30	330	285	3
	H18、H38	＞0.30～0.50	330	285	4
	H19、H39	＞0.22～0.30	340	295	3
	H19、H39	＞0.30～0.50	340	295	4

Coating function

Suppliershould ensure DOS oil of pop can cover is up to 5～10mg/m²/side, and coating surfaceshould be with even wax which is up to 40～100mg/m³/side

Food and packing industry pop can covercoating aluminum panels’ features:

Function		Coating weightg/m²	Deviation of coating	T Bend	MEK	High temperature sterilization	S Resist-ance	Acid resista-nce	Adhe -sion
Pop can Cover	Outer coating	3～6	≤10	≤2	＞50	See Note.1	-	-	1 Grade
Pop can Cover	Inner coating	10～13	≤10	≤2	-	See Note.1	See Note.2	See Note3	1 Grade
Pop can tab	2 sides coating	3～6	≤10	≤2	＞50	See Note.1	-	-	1 Grade
Note： 1 After121℃，30min distill，Internal and external coating without white, loss of light, peeling, and shedding. 2 After121℃，30min S corrosion，Internal and external coating without white, loss of light, peeling, and shedding. 3 After121℃，30min acid erosion，Internal and external coating without white, loss of light, peeling, and shedding.

Appearance

The surface of the pop cans cover coatingdoes not allow defects such as air bubbles, scratches, missing coating,over-burning, oil spots, stains, streaks, color, piebald, roller printing,embossing, periodic prints, chemical liquid etc which impact users.

Each coil allowed a joint which does notallow loose layer or dislocation, the joint can only be overlapped, which needto make the mark in the end, and each batch coil of joint is not morethan 10% of the total number of coils.

Services

Supporting services: Offering semi-finishedproducts & OEM services

Q:Can aluminum coils be used in heat exchangers?: Yes, aluminum coils can be used in heat exchangers. Aluminum is commonly used in heat exchanger applications due to its excellent heat transfer properties, lightweight nature, corrosion resistance, and cost-effectiveness.

Q:The company wants to produce an aluminum coil production line, which is better for large aluminium smelting equipment?: Dongpu heat well, they have the qualification certificate issued by the state kiln construction, as far as I know, their melting furnace Aluminum Alloy 'plan is very good, and the operation is simple and safe, feel good, can be wiped off

Q:What are the different coil annealing options available for aluminum coils?: There are several coil annealing options available for aluminum coils, depending on the desired outcome and requirements. 1. Full Annealing: This is a process where the aluminum coil is heated to a specific temperature and then slowly cooled down. Full annealing helps to relieve internal stresses, improve ductility, and enhance the mechanical properties of the coil. It also results in a soft and fully recrystallized structure. 2. Solution Annealing: Solution annealing is primarily used for heat-treatable aluminum alloys. It involves heating the coil to a temperature above the alloy's solvus temperature, followed by rapid cooling. This process helps dissolve and redistribute any alloying elements, resulting in a homogenous microstructure. 3. Stabilization Annealing: Stabilization annealing is performed on certain aluminum alloys to enhance their dimensional stability and reduce the risk of distortion during subsequent processing or usage. It involves heating the coil to a temperature just below the alloy's recrystallization temperature and then slowly cooling it. 4. Stress Relief Annealing: This type of annealing is performed to relieve residual stresses that may have developed during previous manufacturing processes, such as rolling or stretching. The coil is heated to a specific temperature and held there for a certain duration, allowing the stresses to relax. It helps to improve the coil's formability and minimize the risk of deformation during subsequent operations. 5. Intermediate Annealing: Intermediate annealing is performed during the manufacturing process to restore the ductility and formability of the aluminum coil. It involves heating the coil to a temperature below the recrystallization temperature, followed by a controlled cooling process. This helps to eliminate work hardening that may have occurred during previous operations. These are some of the common coil annealing options available for aluminum coils. The specific choice depends on factors such as the alloy composition, intended application, and desired material properties. It is important to consult with experts or heat treatment professionals to determine the most suitable annealing method for a particular aluminum coil.

Q:Can aluminum coils be used in electrical cables?: Yes, aluminum coils can be used in electrical cables. Aluminum is a commonly used material for electrical conductors due to its excellent electrical conductivity and relatively low cost compared to copper. It is especially used in power transmission and distribution cables where long-distance transmission is required. Aluminum coils are often used in overhead power lines and underground cables. However, it is important to note that aluminum has a lower tensile strength than copper, so the cables need to be properly designed and manufactured to ensure adequate mechanical strength. Additionally, aluminum conductors require larger cross-sectional areas compared to copper to achieve the same electrical performance, which can result in slightly larger cable sizes.

Q:What is the typical yield strength-to-density ratio for aluminum coils?: The typical yield strength-to-density ratio for aluminum coils is approximately 0.3 MPa/g/cm^3.

Q:What are the different protective coatings available for aluminum coils?: Aluminum coils can be protected by various types of coatings. Some popular options include: 1. Polyester Coating: This coating is versatile and offers excellent resistance to weather and color fading. It is commonly used in outdoor settings where the coils may face harsh weather conditions. 2. Polyvinylidene Fluoride (PVDF) Coating: PVDF coatings are highly durable and resistant to fading, chalking, and chemicals. They are often used in architectural applications that require a long-lasting and high-performance finish. 3. Epoxy Coating: Epoxy coatings provide strong adhesion and corrosion resistance. They are frequently utilized in industrial settings, such as the production of appliances or automotive parts. 4. Acrylic Coating: Acrylic coatings offer good weather resistance and protection against UV rays. They are commonly used indoors or in areas with mild outdoor exposure. 5. Polyurethane Coating: Polyurethane coatings are known for their high impact resistance and flexibility. They are often chosen for applications where the coils may undergo physical stress or deformation. 6. Ceramic Coating: Ceramic coatings provide exceptional heat resistance and thermal stability. They are commonly used in automotive applications or areas with high-temperature exposure. In conclusion, the selection of a protective coating for aluminum coils depends on specific requirements, such as weather resistance, durability, or chemical resistance. It is crucial to consider environmental conditions and performance expectations when choosing the appropriate coating.

Q:How do aluminum coils contribute to improved indoor comfort?: Aluminum coils play a crucial role in improving indoor comfort through their contribution to the functioning of HVAC (heating, ventilation, and air conditioning) systems. These coils are commonly used in air conditioning units and heat pumps to facilitate the heat transfer process. The primary function of aluminum coils is to absorb heat from the indoor air and release it outside. When warm air passes over the coils, the aluminum absorbs the heat, causing the refrigerant inside the coils to evaporate. This evaporation process cools down the air, which is then circulated back into the room, resulting in a more comfortable indoor environment. The use of aluminum for coil construction is advantageous due to its excellent thermal conductivity properties. Aluminum is highly efficient in transferring heat, enabling the coils to rapidly absorb and release thermal energy. This efficiency allows the HVAC system to cool down the indoor air more effectively and quickly, contributing to improved comfort levels. Furthermore, aluminum coils offer numerous benefits over other coil materials, such as copper. Aluminum is lightweight, making it easier for the HVAC system to operate efficiently. It is also corrosion-resistant, ensuring the longevity and durability of the coils. This resistance to corrosion prevents the formation of contaminants or blockages that could hinder the heat transfer process, ultimately maintaining optimal indoor comfort. In summary, aluminum coils contribute to improved indoor comfort by facilitating efficient heat transfer in HVAC systems. Their ability to absorb and release thermal energy quickly, combined with their lightweight and corrosion-resistant properties, ensures a more effective cooling process, resulting in a comfortable indoor environment for occupants.

Q:How long do aluminum coils last?: The longevity of aluminum coils can differ based on various factors including maintenance, usage, and environmental conditions. On average, aluminum coils that are well-maintained can endure for approximately 15 to 20 years. Nevertheless, with appropriate care and consistent cleaning, certain aluminum coils have been reported to endure even longer, reaching up to 30 years or beyond. It is crucial to emphasize that regular upkeep, such as coil cleaning, inspection for damage or corrosion, and ensuring proper airflow, can greatly increase the lifespan of aluminum coils. Furthermore, elements like exposure to severe weather conditions, levels of humidity, and the quality of installation can also have an impact on the durability of aluminum coils.

Q:Are aluminum coils resistant to moisture?: Yes, aluminum coils are highly resistant to moisture. Aluminum has a natural oxide layer that forms on its surface, which acts as a protective barrier against moisture and prevents corrosion. This makes aluminum coils an excellent choice for applications where exposure to moisture is a concern, such as in HVAC systems or outdoor equipment.

Q:Can aluminum coils be anodized for enhanced durability?: Indeed, it is possible to anodize aluminum coils in order to enhance their durability. Anodization involves the creation of a layer of aluminum oxide on the surface of the aluminum, resulting in increased resistance to corrosion, wear, and scratches. This layer also offers added protection against UV rays and harsh environmental conditions. By subjecting aluminum coils to anodization, they become more resilient and capable of enduring extended use in a variety of industries, including construction, automotive, and electronics. Moreover, anodized aluminum coils can be further enhanced with additional coatings or finishes to improve their appearance and provide additional protection. Overall, anodizing aluminum coils is a widely employed and efficacious technique for boosting their durability and extending their lifespan.

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