Rotomoulding machine and installation has mould-carrying carriages with drives to produce a double rotation as they move between posts

摘要

The installation consists of a series of mould-carrying carriages (141) equipped with drives to produce a double rotation and take the carriages round a closed circuit (139) so that they move successively and automatically between at least three fixed posts. The installation consists of a series of mould-carrying carriages (141) equipped with drives to produce a double rotation and take the carriages round a closed circuit (139) so that they move successively and automatically between at least three fixed posts. The posts comprise a transformation post with a tunnel or chamber equipped with a fixed infrared heater (147) and injectors (149) for a material such as polyethylene; a cooling post (151) that can be optionally coupled with an injector (152) of an inflation agent such as polyurethane. These are followed by an unmoulding post (135) and a control post (137). The carriages are powered by electricity fed through brushes to rotate a hollow shaft carrying high temperature cables. The heating chambers are in the shape of regular polyhedrons and covered with low-reflective metal plates, while the tunnels have an approximately octagonal cross-section. The injectors are in the form of powder cannon.