CNC Filament Winding is one of the most important processes in composite processing technology.
Basic filament winding machines have two axes of motion, the mandrel rotation and the carriage travel.
For the manufacture of pipes, two axes machines are sufficient.
For pressure vessels such as LPG or CNG containers, it is advisable to have a four axis winding machine. In addition to the
The payout head rotation can be used to stop the fibre band twisting and thus ensuring consistency of bandwidth during winding.
Machines with more than four axes can be used for advanced applications, six-axis winding machines usually have 3 linear and 3 rotation axes.
Machines with more than 2 axes of motion have computer/CNC control, however these days new 2-axis machines mostly have numeric control. Computer controlled filament winding machines require the use of software to generate the winding patterns and machine paths, such software can normally be provided by filament winding machine manufacturers or by using independent products.
Fiberglass direct rovings are immersed in a resin bath where they are coated with resin system. Each strand in the fiberglass roving is coated with sizing that provides secondary bonding between the fiberglass strand and the resin. Sizing can be singular resin system compatible, like polyester compatible or epoxy compatible or multi-system compatible, like polyester+epoxy+polyurethane.
Various types of fibres are used depending on application:
Resin systems used are:
Processing comprises of:
CNC Technics is tied up with CRESCENT TECHNOLOGIES, UK for using CADFIL Software on their filament winders. CADFIL Software is a sophisticated filament winding software which comes in different modules for various applications. Support for this software is supplied by both CRESCENT as well as CNC Technics and is fully compatible with SIEMENS control systems.