Rotary atomizing head type coating machine
AssigneeABB AB
InventorKuniharu Yamauchi
Life of this patent
Estimating the term…
Abstract
A bearing air passage through which bearing air is supplied toward an air bearing of an air motor and a turbine air passage through which driving air is supplied toward a turbine are provided in a housing. An annular space surrounding the air motor is provided between the housing and a cover. A bearing air branch passage connecting the annular space and the bearing air passage to each other and a turbine air branch passage for connecting the annular space and the turbine air passage to each other are provided. The air branch passages lead a part of the compressed air to the annular space and keep the cover in a heated state.
Claims5
A rotary atomizing head type coating machine comprising:
- a cylindrical housing whose inner peripheral side is a motor accommodating portion;
- a cylindrical cover covering an outer peripheral side of said housing;
- an air motor accommodated in said motor accommodating portion of said housing and rotating and driving a rotational shaft supported by an air bearing by a turbine;
- a rotary atomizing head located on the front side of said housing and mounted on a distal end portion of said rotational shaft of said air motor and spraying a paint supplied while rotating together with said rotational shaft;
- a feed tube provided by being inserted through said rotational shaft and supplying the paint toward said rotary atomizing head;
- a shaping air ring provided by surrounding an outer peripheral surface of said rotary atomizing head on the front end side of said housing and having an air ejection port for ejecting shaping air for shaping a spraying pattern of the paint sprayed from said rotary atomizing head;
- a bearing air passage provided on said housing, a distal end of the bearing air passage being connected to the air bearing of the air motor, and supplying bearing air toward said air bearing of said air motor;
- and
- a turbine air passage provided on said housing and supplying driving air toward said turbine of said air motor, wherein:
- an annular space surrounding said air motor is provided between said housing and said cover;
- said housing includes an bearing air branch passage that branches from said bearing air passage and connects said bearing air passage and said annular space to each other;
- by forming said bearing air branch passage to have a narrower diameter as compared with said bearing air passage, a part of bearing air supplied from said bearing air passage toward said air motor is led to said annular space;
- and
- an air discharge passage formed at a position of the outer peripheral surface of said rotary atomizing head, the air discharge passage configured to discharge an outflow air flowing out of said annular space into the atmospheric air at the position of said outer peripheral surface of said rotary atomizing head.
Dependencies are inferred from the claim text.