Development and practical application of steel drum printing dryer
——Japan Yamamoto Industry Co., Ltd.
Translation / Xin Qiaojuan
Mr. Yamaguchi, Mr. Yamaguchi, Yamamoto Industrial Co., Ltd., Japan
ã€Abstract】First introduced the situation of Yamamoto Industrial Co., Ltd., a factory specializing in the production of steel drums. Of course, in Japan, all steel drum processing plants have three waste treatment facilities. The Yamamoto Industrial Co., Ltd. factory organized a visit at the 7th AOSD meeting in Japan in 2010. The second is to introduce the background of the development of printing (word) dryer; the third is to introduce the development process of printing and drying machine; the fourth is to introduce the development of printing dryer for indirect heating. The fifth is the effect produced by the use of printing drying equipment.
I. Overview of Yamamoto Industrial Co., Ltd.
Yamamoto Industrial Co., Ltd. was established in 1946 and has a history of 70 years. Production of steel drums and old barrels of 10 liters to 220 liters. It also produces the design, manufacture and installation of dust removal and transport equipment, filters, pressure vessels, gas storage tanks and other mechanical equipment. The company has a total of 457 employees, covering an area of ​​80,000 square meters. With an annual sales value of 10.5 billion yen, the company has two branches in Tokyo and Osaka.
Fukuoka Jiuzhou Yamamoto Industrial Co., Ltd.
Second, the development background of printing dryer
1. UN UN-marked printing (PC encoder)
[Steel barrel contact printer]
Contact printer
The PC encoder prints on the surface of the steel drum by pressing the rubber stamp on the surface of the steel drum to trigger the rotation of the marking roller, which enables the marking of the surface of the steel drum.
2, the meaning of the UN mark
The following UN marked steel drums are suitable for the packaging and transportation of dangerous goods.
[Example] UN mark on the top surface of the barrel
1 Packing type
5 Year of production
2 packaging category
6 manufacturing country code
3 Dangerous cargo liquid specific gravity
7 Inspection agency code
4 Hydraulic test pressure
8 manufacturer code
The upper logo is essential because it provides packaging information for transporting dangerous goods both inside and outside Japan.
3. Printing UN marked ink
(The above are the parameters indicated in the manufacturer's catalogue)
As for the use of black or white ink, it mainly depends on the color and drying time of the outer surface of the steel drum.
4, problems and solutions
1 The steel drum is directly loaded onto the truck after it is produced and is continuously operated.
2 UN mark printing, it takes about 10 minutes to load the car.
Note: The graphic printed on the barrel before loading the steel drum should be dry and clear, otherwise the graphic will be scratched and cannot be recognized.
[Printing is not clear, can't get customer satisfaction]
5, measures to dry printed graphics
1 After the printing machine has printed the graphic, directly use the kerosene burner to heat the printed part of the steel drum.
2 Before loading the drum, first pass a simple hot drying oven made with a far-infrared electric heater.
RESULTS: Although the degree of dryness was improved, the situation in which the graphic was not completely dried was not completely eliminated.
6, the first is to measure the existing problems
1 Due to the special nature of printing, ink requirements are thick in some places and it is difficult to dry quickly.
2 Simple hot air drying oven has insufficient drying capacity.
3 With this method, it consumes a lot of energy and violates the company's commitment to energy conservation and emission reduction (down 1% per year).
Followed by print design layout issues
The drum printing was established during the visual inspection, so the drying conditions during the visual inspection were not checked at first. Secondly, because the printing position on the steel drum varies from user to user, a staff member is required to print the position on the steel drum.
Workflow overview
Product processing completed? Visual inspection? PC encoder printing? Product storage? Shipping (or loading).
Summary of the problem: [required]
1 Improve the drying ability of graphic printing
2 Drying facilities need energy saving and environmental protection
3 Set up the visual inspection process before printing on the press.
Third, the development process of printing and drying machine
1 Overview
1 printed graphics are completely dry
It can meet continuous operations from production to loading/transportation.
2 Energy saving and environmental protection
2. Joint development with partners
1 IH electromagnetic heater was introduced through joint development with kyudenko.
2 Including the initial development and design period, the current printing and drying test has been carried out for 6 months.
3. The reason for choosing IH electromagnetic heater
1 Can quickly dry the printing area
2 The heating material is metal (steel plate).
3 The heating area is not large during the drying process.
[How IH heater works]
working principle:
1 When a current is applied to the IH coil, a magnetic force is generated and a vortex flows through the magnet.
2 The eddy current generates a thermal resistance that causes the magnet to heat up.
3 Only the magnet is heated and the IH coil and non-magnetic body are not heated.
4, prototype test
The mechanical conditions of the prototype test, such as the inverter setting and heating time, were put forward, and good test results were obtained. The test results show that the machine does not affect the paint effect on the inner and outer surfaces of the steel drum.
Fourth, printing dryer (IH method) overview
1, the machine installation location
- Establish a visual inspection process during the finishing of the manufacturing process to increase the drying time.
- Check the dry state during visual inspection.
Workflow overview
PC encoder printing? Process completion? Visual inspection? Product storage? Shipping (or loading).
2. Installation time: January 2012
3, device positioning
Rotate the steel drum for positioning and stop at the specified printing position. (can be stopped at the location specified by each user)
4, printing UN mark
Set up 2 stations to eliminate waste and loss due to different colors and patterns of printed graphics.
5, IH heating device
The printed area is heated to about 130 ° C in 2 seconds.
Five, the effect of the comparison
projectBefore improvement: simple hot air drying oven
After the transformation: the newly developed dryer (IH method)
characteristic
The temperature can only rise to 40 °C.
Many defects occur because they cannot be completely dried
The temperature in the printing zone immediately rose to 130 ° C, and the heating and drying conditions were good. You can directly touch the printed graphic when checking
Safety
The use of fuel such as kerosene and far-infrared hot air heating makes equipment maintenance complicated.
The equipment is easy to maintain without fuel.
Energy saving and working environment
700kw / day (usually 70kwh)
The periphery of the printing area is also heated at the same time
30kw/day (3kwh), energy saving is about 95%, and the surrounding area of ​​the printing area is not as hot as before.
Saving manpower and space
Manual operation requires a lot of space
Fully automatic IH unit, the equipment is only 1 meter long, saving space and manpower.
cut costs
Pay 1 person to visually check the cost of the employee
Electricity fee: 300,000 yen / month
No labor costs
Electricity costs: 13,200 yen / month, a reduction of 95%.
Conclusion
1. Introducing the development of printing and drying machine, not only the graphic printing and drying state is stable, but also improves the printing quality and customer satisfaction of the graphic and text. Also contributed to environmental protection and energy conservation.
2. From the installation of the equipment to the present, there have been no obvious marking defects in the production, transportation, storage and loading process, and there is no problem in shipping to the customer.
3, IH (indirect) heating and drying equipment We have a broad space for development and prospects in the steel barrel industry, the next step we should promote it to the weld of the steel barrel barrel and pre-heating drying seal packing before sealing Coatings and other production processes.
thanks for your attention!
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