Pressure injection molding of glass and glass-ceramic parts

Henry M. Blair

doi:10.1117/12.218450

8 September 1995 Pressure injection molding of glass and glass-ceramic parts

Henry M. Blair

Proceedings Volume 2536, Optical Manufacturing and Testing; (1995) https://doi.org/10.1117/12.218450
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Spin cast and fusion techniques have been available for the production of borosilicate mirrors for some time. Our efforts in pressure injection molding methodologies have been primarily devoted to developing eclectic geometric variety in substrate configuration, improved homogeneity of the medium, reduced face-plate bubbles, cross-sectional dimension control, and cost effectiveness. These attributes are intended to enhance the inherent characteristics of the existing techniques, i.e., savings in weight, high deflection, stiffness, and thermal stability. We have successfully molded mirror substrates in a diversity of sizes and shapes from 50 mm polygons through 1.4 meter rounds and 1.7 meter ellipses in a varity of aspect rations. Rib structure and mounting location is totally arbitrary and front and black plate geometry is unrestrained. In order to achieve reliable and repeatable results, it was necessary to develop new techniques in refractory design and fabrication, re-evaluate the raw media, redesign the existing furnace control and heating scenario and write new control and reporting software.

Citation Download Citation

Henry M. Blair "Pressure injection molding of glass and glass-ceramic parts", Proc. SPIE 2536, Optical Manufacturing and Testing, (8 September 1995); https://doi.org/10.1117/12.218450

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available