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This paper reports the new molding process for thinwall
containers called the "Wedge Molding Process".
The process has been developed to meet the current
social requirements of environmental protection and
product recycling, and has the following features when
compared with the conventional molding processes.
1) 30 to 40% lower mold-filling pressure,
2) 20 to 30℃ lower resin temperature,
3) Increased mechanical strength of formed products
by 5 to 10% due to the lower forming temperature and
higher density of molten resin,
4) Minimized burning of formed products and reduced
odor for food containers due to the lower forming temperature
of molten resin,
5) Forming of thinner wall containers,
6) Forming of thinner wall containers of biodegradable
resins with poor fluidity and mixtures of resin and paper,
and
7) Smaller injection molding machines and reduction of
manufacturing cost. |
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