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US 4,685,946 AGranted
Method for the manufacture of glass bodies
AssigneeU.S. Philips Corporation
InventorsPierre L. L. M. Derks, Bernhard Lersmacher, Hans-Jurgen Lydtin
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Abstract
Method and equipment for the manufacture of glass bodies wherein a porous green body is formed by extrusion from the starting material for the glass body in the form of a plastic mass and this green body is then purified and sintered, the plastic mass being transformed into a state of reduced viscosity by the application of mechanical forces utilizing the thixotropic effect and being extruded in this state.
Claims6
A method for the manufacture of a glass body comprising:
- (a) applying mechanical force to a gel formed from a thixotropic suspension of SiO.sub.2 particles to reduce the viscosity of said gel,
- (b) forcing said gel, while in said reduced viscosity state, through a die to form an extruded porous green body;
- and
- (c) purifying and sintering said green body to form a glass body.
1 more element
Dependencies are inferred from the claim text.