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With an
existing laser welding method, as explained in the pages concerning laser
transmission welding (LTW), |
(“What is laser transmission welding?” “Features of laser transmission welding”) |
one of the parts employs a laser-transmitting (non-absorbing) resin and
the other employs a laser-absorbing resin. A laser light is then radiated from the
laser-transmitting resin side. |
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The radiated laser light passes through the laser-transmitting resin, gets
absorbed by the laser-absorbing resin, generates heat, and allows welding.
At this point, a molten pool is formed on the welding interface. (Figure
1) |
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As
another existing laser welding method, laser absorption welding is available.
As the principle of laser absorption welding, a laser absorption body is
sandwiched between laser-transmitting materials and laser light is radiated
from the laser-transmitting material side. The radiated laser light passes
through the laser-transmitting resin, gets absorbed by the laser absorption
body, generates heat, and allows welding. (Figure 2) |
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However, laser
transmission welding (LTW method) and laser absorption welding have some
problems. |
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- Laser transmission welding (LTW method) |
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- Laser absorbing welding |
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To solve these problems, we have developed a new resin welding method called
“the ACW® method” that makes it possible to conduct laser welding between resin
parts of the same type by controlling the balance between laser transmission
and laser absorption by resin material. |
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As the principle of ACW® method, a laser light-transmitting/absorbing resin whose balance between
laser transmission and laser absorption has been balanced is prepared,
and then laser welding between resin parts of the same type is conducted.
The
radiated laser light forms a molten pool inside the resin, and laser welding
between resin parts of the same type is conducted. (Figure 3) |
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The next page explains the Advantages
of the ACW® method |