Apparatus for supporting a preform having a supporting core
The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two mounting points between which the supporting core of the preform to be manufactured or built up is mounted, plasma-torch and material-supply means disposed radially relative to said supporting core and being mounted to move in axial translation relative to and parallel to the supporting core so as to make said preform around said supporting core, said apparatus being wherein it includes controlled support means constituting additional localized abutment points between said mounting points for said preform being manufactured or built up.
1. An apparatus which supports a preform, said preform including a supporting core, the apparatus comprising:
a rotation mechanism that rotates said supporting core of the preform about a horizontal axis;
an adjustable support member; and
a rotatable wheel mounted on said adjustable support member,
wherein said rotatable wheel (1) has a rotational axis which is parallel to said supporting core, (2) is mounted to rotate freely, and (3) includes a tread strip which comes into tangential contact with said preform,
wherein said adjustable support member is adjustable between a variable active end position in which said rotatable wheel is in contact with said preform, and an inactive end position in which said rotatable wheel is spaced apart from said preform, and said installation further comprises:
a sensor that measures a preform characteristic indicative of a sag of said preform; and
a servo-controller coupled to said sensor, said servo-controller adjusting said adjustable support member depending on said preform characteristic measured by said sensor.
2. The apparatus according to claim 1 , further comprising a plurality of rotatable wheels in addition to said rotatable wheel having respective associated adjustable support members, said plurality of rotatable wheels being disposed at regular axial intervals and radially to said horizontal axis.
3. The apparatus according to claim 1 , wherein when said adjustable support member assumes said variable active end position, said rotatable wheel is in contact with a bottom of a periphery of said preform.