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What is MuCell? |
- A technical process to use a supercritical fluids
(SCF) of insert gases Typically nitrogen or carbon
dioxide, to create evenly distributed and uniformly
sized microscopic cells throughout a polymer |
- A processing technology in which supercritical
gas is diffused into molten polymer to develop foamed
plastics with cell sizes between 5 ～ 50㎛ |
- Using inexpensive, environmentally friendly
supercritical fluid (SCFs)
of atmospheric gases (CO2 or N2). Reducing part
weight and eliminating stress warpage, sink marks,
while either reducing or eliminating hold time |
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Summery of MuCell |
- MuCell is a licensed technology with Trexel
Inc in USA and developed by MIT
(Massachusetts Institute of Technology) (2001. October) |
- Microcellular foam injection molding is a process
and equipment technology for plastic injection molded
components that results in an average cost reduction
of 20 ～ 30% compared to conventional molding net
of all MuCell - related costs and trend to spread
rapidly in the field of Automotive and functional
interior parts |
- MuCell technology is applicable to injection
molding and extrusion processing and it is highlighted
as a next generation technology instead of Gas injection |
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Basic theory of MuCell |
- The MuCell technology is a processing technology
in which supercritical gas is diffused into molten
polymer to develop foamed plastics with cell sizes
between 5 ～ 50㎛.
One of the greatest advantages of this technology
is 20 ～ 30% reduction in production in product weight
without significant loss of mechanical properties
of conventional non-foamed plastics |
Saving
production cost |
| - Reducation of Material usage 10～20%, and Weight
reducation 1～17% |
| - Cycle time reduction 20～50% without back press
process (Net cooling time reduction 20%) |
| - Reduction of Clamping tonnage 50～80% as Improvement
of material fluidity |
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Improvement of quality |
| - Elimination of Warpage due to removing mold
stress |
| - Dimensional accuracy and stability |
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Reinforcement of Material physical properties |
| - Increasing shock prevention and heat insulation
making cells into the organizaqtion |
| - Realization of compression intensity and excellent
tension compare with existing forming products |
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Reduction of Environment cost |
| - Possible to recycle using CO2, N2 gas |
- Reduction of Electric consumption and machine
tonnage due to low pressure injection machine using
supercritical fluids |
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Advantage of MuCell |
| - Applicable to all the material |
| - Reduction of material Viscosity Max. 60% |
| - Reduction of Molding temperature Max. 70% |
| - Reduction of Injection pressure 30 ～ 50% |
| - Elimination of Holding pressure time + minimize
the cooling time = reduction of cycle time |
| - Reduction of Products weight Max 50% |
| - Reduction of Machine tonnage 30 ～ 80% |
| - Elimination of sink mark and warpages |
| - Environmental friendly technology |
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| MuCell Process |
| Stage |
Contents |
1st Stage
Gas Injection |
- CO2 gas inject to the cylinder
- CO2 dissolves by the macromolecule |
2nd Stage
Mucell Forming |
- Forming ball production stage
- High speed pressure drop equired |
3rd Stage
Cell Growth |
- Cell formation stage
- Formed cell ontrolled by the processing condition
- precise mold and temperature control reqiored |
4th Stage
Molding |
- Molding stae followed by injection |
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