Qingdao Yonghui Packaging Machinery Co.,Ltd |
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Tungsten Carbide Alloy Steel Corrugating Rolls For Single Facer
Corrugated Machine
Features of Tungsten Carbide Alloy Steel Corrugating Rolls
a. Tungsten carbide corrugated roller has excellent wear resistance
and low flute height. Moreover, it will not reduce the compressive
strength of the finished corrugated board. A more optimized v-shape
flute profile can be designed to increase the strength of the
cardboard, reduce the amount of the glue applied and save
corrugated paper.
b. Tungsten carbide corrugated roller will never wear in theory,
and can ensure the production of high quality finished corrugated
board’s durability
c. The service life of tungsten carbide corrugated roller can reach
at least 35 million meters, reducing the number of maintenance and
replacement times, saving manpower, material and financial
resources.
d. Tungsten carbide roller’s wear resistance is good, and it’s
tungsten carbide coating adopts special removing process, so
corrugated roller substrate can not be damaged, and corrugated
roller can be used for many times with repairing.
Production Process
⇒ 1. Strict Selection High Quality Material
Good raw material is an important factor in high quality of alloy
steel 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.
⇒ 2.High Hardness from Vertical Quenching Process
Intermediate frequency quenching can guarantee both the hardness
and harden depth we need. Our harden layer depth can reach to
8-12mm. With harder base material as foundation, the lifetime of
our corrugating rolls are greatly extended.
⇒ 3. 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. 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.
⇒ 4.Durable from Supersonic Tungsten Carbide Spraying
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.
⇒ 5.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.
⇒ 6.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.
Flute Profile
Flute | Profile | Height(mm) | Pitch(mm) | Flutes/300mm | T.U.R |
A | UV | 4.5-5.0 | 8.0-9.5 | 34±3 | 1.45-1.52 |
C | UV | 3.5-4.0 | 6.8-7.9 | 41±3 | 1.37-1.47 |
B | UV | 2.5-3.0 | 5.5-6.5 | 50±4 | 1.33-1.41 |
E | UV | 1.1-2.0 | 3.0-3.5 | 93±6 | 1.24-1.36 |
F | UV | 0.8-1.0 | 2.2-3.2 | 115±20 | 1.19-1.25 |
G | UV | 0.6-0.8 | 1.8-2.8 | 136±20 | 1.15-1.20 |
N | UV | 0.4-0.6 | 1.2-2.2 | 193±55 | 1.10-1.15 |
Others | UV | Customized | Design | Design | Design |
Contact me:
Bonnie Li