Weld powder coating and electromagnetic induction drying technology
Guangdong Hanjiang Light Industry Machinery Co., Ltd. Huang Ruilong
Huang Ruilong gave a speech at the Guilin Steel Barrel Industry Conference
Guangdong Hanjiang Light Industry Machinery Co., Ltd. (Hanjiang Machinery) was established in 1992. It is a backbone enterprise in China's can manufacturing machinery industry. It is mainly engaged in the research, development, production and sales of metal packaging and canning machinery. The products cover beverage cans and food. Can production line for cans, milk powder cans, chemical tanks, etc. The company has strong technical strength, has a first-class scientific research and engineering team, and has in-depth research and rich experience in the field of light, machine and electricity integration of can making machinery.
The company's R&D center is aimed at high-end products with complete functions, advanced and durable. It is committed to saving R&D and innovation of canning technology in materials, labor, energy saving and environmental protection. On average, more than two high-tech products are put on the market every year. The company's research and development of powder coating machine, lunch meat square can combination machine, weld replenishment induction dryer, special-shaped cover high-speed injection drying machine (easy pull cover engraved coating), two-piece can production line and other products to fill the domestic system The tank industry gap, and won a number of China's canning industry science and technology award. Among them, the energy-saving and environmental protection technology of the weld-filled induction dryer has surpassed the technical level of developed countries in the world, saving hundreds of millions of energy consumption per year for global can-making enterprises, and making outstanding contributions to the industry.
With the rapid growth of the domestic canning industry in the past decade and the increasing quality of metal packaging for users, powder coating technology has developed into a popular canning process in the metal packaging and canning industry, which is widely used in food. Cans, beverage cans, aerosol cans, convenient buckets, etc.
Before 2002, the application of powder coating technology in China's canning industry relied mainly on imported powder equipment, and the equipment price was very expensive, which led to the application of this technology only in domestic large and medium-sized canning enterprises, and the empty cans. The manufacturing cost is also relatively high, so that it cannot be quickly popularized.
Until 2003, Hanjiang Machinery successfully developed the first powder coating machine in China, and unveiled it at the Shanghai International Metal Packaging Exhibition that year, breaking the monopoly of such equipment for a long time by European and American countries, filling the gap in the domestic industry.
First, the weld powder spraying machine
The FMPT-8 powder coating machine is one of the powder series products introduced by Hanjiang Machinery. Specialized in tank coating welding technology for cannery manufacturers. By borrowing and adopting many foreign advanced powder coating coverage technologies, the machine has novel structure, high system reliability, simple operation, wide applicability and high cost performance.
FMPT-8 powder spraying machine
Working principle: The plastic powder is sprayed on the can body weld by static electricity, and the solid powder is melted and dried by oven heating to form a plastic protective film (polyester or epoxy resin) on the weld.
Compared with liquid roller coating, it has the following obvious advantages:
1. It can completely and evenly cover the burrs and high and low faces on the weld according to the specific shape of the weld, so it can protect the weld from the corrosion of the contents.
2. The plastic powder has high corrosion resistance to various chemical solvents and sulfur, acid and high protein in the food, making the powder coating suitable for various contents;
3. The excess powder after powder coating adopts the principle of recycling and re-spraying, which makes the powder utilization rate high, which is the most ideal choice for weld protection.
Metal food can welding
Example of powder coating machine applied to steel barrel weld seam spraying:
Steel barrel weld seam powder spraying machine
Steel barrel weld seam powder spraying machine
Second, electromagnetic induction dryer
1. The purpose of applying electromagnetic induction dryer:
(1) Energy conservation and emission reduction are the themes of economic development in the 21st century;
(2) “Energy saving and emission reduction is also an incomeâ€;
(3) Enterprises reduce production costs and enhance competitiveness;
(4) Improvement of the working environment;
(5) Green environmental protection is the social responsibility of enterprises.
2. Electromagnetic induction dryer has become the mainstream drying equipment in the canning industry. Compared with traditional drying equipment, its advantages are:
(1) The tank body is heated by its own induction, and the time required for heat generation is much shorter than the conventional external heating type drying, and the efficiency is higher;
(2) Energy utilization is power supply, energy saving and environmental protection. It does not pollute the environment due to the combustion of exhaust gases.
(3) No need for fuel containers, space utilization is higher.
3. Can be equipped with various types of three-piece cans and steel drum production lines:
(1) The tank diameter can be adapted to Ф52mm-Ф153mm-Ф710mm.
(2) The production efficiency is 1000-500-12 cans/min.
(3) Saving production costs and improving the competitiveness of enterprises.
(4) Saving hundreds of millions of electricity and gas bills annually for the canning industry in China.
Mass production of high speed induction dryer
Application example: Workshop after dryer transformation
4. Continuous innovation - applications in other areas:
(1) Full spray drying in the can body
(2) bottom cover drying
(4) coated iron drying
(5) 200L steel barrel weld seam powder spray drying.
Third, 200 liter steel barrel weld seam powder spray drying
1. The traditional steel barrel production line process:
There are disadvantages: the latter two processes, namely painting and drying, inevitably cause serious pollution to the environment.
2. Using coated iron material (or color printing iron, pre-coated iron, etc.), and introducing welding powder spraying and electromagnetic induction drying technology, the environmental protection process without painting drying is formed:
3. Application examples
200 liter steel drum induction dryer example
Weld seam powder spray drying physical map in steel drum
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