AIRMOULD® – Internal gas pressure technology
AIRMOULD® – Internal gas pressure technology
The patented gas-assisted injection molding process developed by WITTMANN BATTENFELD
AIRMOULD® application
AIRMOULD® internal gas pressure injection molding is a process in which nitrogen is injected into the mold cavity partly or completely filled with melt. The pressurized gas forms a bubble at the center of the melt, which counteracts shrinkage contraction on the outside and thus eliminates sink marks. By reducing the amount of plastic and enlarging the central cavity, it is possible to produce specific lightweight components with short cycle times and simultaneously good surface quality. This process opens up good opportunities for molded part designers to produce complex parts with smooth surfaces in one piece.
Advantages of AIRMOULD® application:
- Quality improvement
- Weight reduction
- Plastic material savings
- Reduction of component unit costs
- Prevention of sink marks
- Reduction / prevention of warpage
- Design freedom
AIRMOULD® equipment
The nitrogen and pressure generation equipment developed and manufactured by WITTMANN BATTENFELD is available in different sizes and with varying capacities, to supply individual machines or to function as central systems supplying several machines.
The control systems of the units are self-explanatory. All important process information is clearly displayed. The control of every unit can be integrated into the corporate network, which enables transfer of all settings and visualizations within the plant to any network-compatible PC.
Machine equipment:
- Nitrogen generator (SE)
SE series, mobile units, store nitrogen filtered from the surrounding atmosphere through a multi-membrane system - Compressor (DE)
DE series, nitrogen is compressed to an operating pressure of 300 bar - Pressure control modules
- Injection modules or AIRMOULD® machine nozzle
- Mobile control unit or full integration into UNILOG B8
Advantages of the equipment
- All components from a single source
- Can be expanded at any time by adding a nitrogen generator
- Independent operation, logistics to supply nitrogen bottles
- Modest space requirements
- Modern control system with remote control options
- Up to eight pressure control modules can be connected
- Program to control core pulls
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