Strict Selection High Quality Material
Good raw material is an important factor in high quality of corrugating roll. We select the best raw material manufacturer in China. With high strength and toughness, good hardenability, no obvious temper brittleness, 50CrMo alloy steel is specialized material for manufacturing corrugating rolls. Our raw material shell thickness is more than 70mm, the thicker shell can reduce deformation and keep stability during production.
Precision Welding Can Be Inseparable
Both ends of the roller body should be heated to release the size of the inner bored hole. After the spindle heads are put in, the roller body and the spindle heads should be held tightly after natural cooling. When everything is ready, a driving fit interface has been formed between the roller body and the spindle heads by means of preheating, welding or bolting. Special care should be taken when welding, because finished corrugated roller body’s temperature will rise constantly when the roller is running, and the roller body also bears pressure of the steam from the inside of the roller body, which will form the so-called “pressure vessel”. In view of this, the roller body and the spindle heads joint must pass the pressure test. When the welding process finished, the work piece shall be put into the furnace for high temperature tempering to reduce stress.
Seiko To Reach Craftsmanship Manufacturing
The assembled corrugated rolls are returned to the lathe for reprocessing, with all diameters slightly larger than the finished product. Since all axes rotate in sync, you must make sure they are concentric. This is very important for the smooth operation of the single-sided machine. After this processing, the roller will also be inspected, including magnetic particle flaw detection and pressure testing.
Meticulosity for Primary Flute Profile
When the entire circumference of the roll has been engraved with flutes, the knife is lowered, repeat the above operation, carved a slightly deeper flute. Blanking is also available with the current use of a more common hob. When operating, at the same time the roller body along the circumference of the direction of corrugated. These are just rough working procedures, only carved out the general shape of the flute. Finally, through finish grinding , the corrugated roll of the final flute profile.
Rigorous for Precise Grinding
After heat treatment and the cutting slots, the roller shall be put on high precision automatic CNC grinding machine to do finish grinding. Almost every set of corrugating rolls are needed to be designed and customized separately according to the width, diameter, flute height, corrugated paper GSM, speed and cardboard physical index requirement. The designed flute profile is copied on a costly diamond tool. When grinding wheel and diamond tool touch together, the flute profile is dressed on grinding wheel. By grinding wheel grind each flute several times until the accuracy is within our technical permitted requirement. The Siemens control system play a key role in guarantee the accuracy.
Durable from Supersonic Tungsten Carbide Spraying
Tungsten carbide corrugated roller producing technology is different traditional corrugated roll. Because of the particularity of tungsten carbide material, the requirement of the base material hardness is higher, flute profile before tungsten carbide spraying is more precise, which is needed to match the performance of tungsten carbide. Spraying technology is the key, which can ensure the hardness and binding force of tungsten carbide.Most advanced Praxair JP 8000 HVOF tungsten carbide spraying equipment and technology is adopted and Praxair 1342 super hard tungsten carbide powder is used for our corrugating roll. Before tungsten carbide spraying, we do sand blasting treatment on the surface which make rough surface to increase adhesion of tungsten carbide powder.
Strict Test to Keep Improving
Before and after the surface treatment including tungsten carbide plating or hard chrome coating of corrugating rolls,it is needed to check the size,hardness, precision,flute profile,and simulation feeding paper. Special projector is used to check the flute profile and feeding different GSM paper to ensure the performance of corrugating rolls.
Repeatedly Polished, Smooth As a Mirror
Meijia adopts special polishing crafts, such as the corrugated rollers use America Praxair 1342VM series super hard tungsten carbide roller, special customized polishing wheel. With our company’s fully automatic CNC corrugated roller producing process’s special polishing machine and our independent grinding polishing technology R&D, the tungsten carbide roller’ s surface finish degree can reach Ra<0.6μm, which will improve the accuracy of the flute profile, and make sure the quality of the corrugated roller.
Contact us
Company telephone：+86-532-86256688
Corporate fax：+86-532-86256588
Contact information: Liu Song 136 8761 7101
Add：No. 11, Zhongxingda Road, Gongjiazhuang Industrial Zone, Jiaozhou puji Town, Qingdao
Contact us
Tel：+86-532-86256688
Fax：+86-532-86256588
Controlling company:
Wang Yuanping 18669870777
Liu Song 13687617101
Beijing Tianjin Hebei Region，
Sheng Feng, 18766229352
Luyu Region，
Yang Qiang, 18766226131
Jiangsu Anhui Region，
Chu Guannan, 15698116585
Southwest Region，
Yang Maocai, 15698116617
Add：No. 11, Zhongxingda Road, Gongjiazhuang Industrial Zone, Jiaozhou puji Town, Qingdao
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