Device and method for forming glass bodies
AssigneeSCHOTT Schweiz AG
InventorJohannes Segner
Life of this patent
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Abstract
A device for the shaping of glass bodies, in particular of pharmaceutical vials, comprises a clamping chuck for holding a glass body, a rotary drive for driving the clamping chuck rotatingly, further at least one heat source for heating a glass body held within the clamping chuck, and further a controller which is coupled to the rotary drive so that the clamping chuck can be driven at variable rotational speed.
Claims19
A method for the shaping of pharmaceutical vials, comprising the steps of:
- providing a hollow glass body;
- heating a local region of said hollow glass body to a softening temperature while rotating said glass body at a first rotational speed of 10 to 50000 rpm until a viscosity of said local region is in a range of 103 to 105 dPas;
- and
- varying said rotational speed to a second rotational speed while forming said hollow glass body.
A method for the forming of glass bodies, comprising the following steps:
- providing a plurality of processing stations, each processing station comprising:
- a clamping chuck for receiving a glass body;
- a rotary drive for driving said clamping chuck rotatingly at a rotational speed;
- controlling the rotational speed of each rotary drive of each processing station independently from each other and continuously between a minimum value and a maximum value;
- performing a first processing step on the glass body on a first one of said plurality of processing stations;
- performing a different processing step on the glass body on a different one of said plurality of processing stations;
- removing said glass body from the first processing station;
- transferring said glass body to said different one of said plurality of processing stations;
- and
- heating the glass body on at least one of said processing stations.
A method for the forming of a glass body, comprising:
- providing a plurality of processing stations, each processing station comprising a clamping chuck for receiving the glass body and a rotary drive for driving said clamping chuck rotatingly at a rotational speed;
- controlling the rotational speed of each rotary drive continuously between a minimum value and a maximum value, wherein the rotational speed of at least two processing stations is controlled independently from each other, and
- removing the glass body from a first one of said plurality of processing stations and transferring the glass body to a different one of said plurality of processing stations,
- wherein said plurality of processing stations comprises at least two processing stations that further comprise at least one heat source for heating the glass body,
- wherein said controller controls said clamping chucks to a standstill and controls at least one handling device to remove and transfer the glass body between said plurality of processing stations only when said clamping chucks are at said standstill.
A method for the forming of glass bodies, comprising
- receiving a glass body within a clamping chuck;
- rotatingly driving the clamping chuck at a first rotational speed;
- selectively heating the glass body received within said clamping chuck;
- advancing a shaping body against the glass body in a radial direction to form a closed bottom on the glass body;
- retracting the shaping body from the glass body after forming the closed bottom;
- and
- rotatingly driving the clamping chuck at a second rotational speed after retracting the shaping body from said closed bottom to form a flat bottom with even material thickness.
Dependencies are inferred from the claim text.