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plastic lenses

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Journal Articles
Alloy Digest (1978) 27 (2): Bi-3.
Published: 01 February 1978
... and recycled into new uses any number of times. Their major use is for lens blocking when grinding glass and plastic lenses and optical components. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating...
Journal Articles
Alloy Digest (1984) 33 (6): Bi-36.
Published: 01 June 1984
... successfully for foundry aids, machining aids (anchoring, etc.) dental models, radio-paque contrast, model railroading, home castings, fusible elements in safety devices and alarms, low-temperature solder and lens blocking in the optical industry for plastic lenses. Manufacturers: Producers of low-melting...
Journal Articles
Alloy Digest (1981) 30 (9): Bi-26.
Published: 01 September 1981
... 117 is normally used in gravity casting but also lends itself well to pressure casting and centrifugal casting methods. Foundry Uses: IndaUoy 117 is used for proof-casting cavities of plastic and rubber molds, forgings dies, gun chambers, etc. Roof casting requires factors of minimum pouring...
Journal Articles
Alloy Digest (1998) 47 (2): SS-707.
Published: 01 February 1998
... process, produces one of the best 420 premium quality stainless steels available. Applications: Fii 420M Premium Quality is recommended for plastics. glass, and other materials requiring molds that exhibit excellent polishability. The addition of molybdenum improves the corro- sion resistance of Fii 420M...
Journal Articles
Alloy Digest (1980) 29 (4): Bi-16.
Published: 01 April 1980
... is frequently used for dental models, prosthetic development work, radiopaque contrast used in X-Ray work, model railroading components and castings needed in the home. Foundry Applications: Ostalloy 117 is suitable for proofcasting cavities of gun chambers, forging dies, and plastic and rubber molds. Roof...
Journal Articles
Alloy Digest (1982) 31 (3): Bi-28.
Published: 01 March 1982
... cer- tain that cavity is completely filled by puddling the alloy with a fine wire before it solidifies, and (5) Allow up to 5 hours aging (depending on application) before placing in operation. Lens Blocking: In optical manufacturing, Ostalloy 136 is used for the blocking of glass lenses during...
Journal Articles
Alloy Digest (2000) 49 (5): TS-577.
Published: 01 May 2000
... Boehler M310 ISOPLAST is a martensitic stainless steel encompassing specialized thermal treatments and electroslag remelting to develop a plastic mold alloy with a combination of properties including corrosion and wear resistance and polishability. This datasheet provides information...
Journal Articles
Alloy Digest (1989) 38 (6): SS-507.
Published: 01 June 1989
.../transfer molds: blow molds; exuusion and pultrusion dies. The steel resists wear by abrasive filled plastics or composites. It is recommended for long produc- tion runs and because of its high surface finish, for molding of optical lenses. Manufacturer: Uddeholm Corporation Rolling Meadows, Illinois 60008 ...
Journal Articles
Alloy Digest (2005) 54 (4): SS-922.
Published: 01 April 2005
...- ance and high-temperature physical properties. Mar-X resists atmospheric as well as chemical corrosion due to plastic formulation or by-products formed during the plastic injection process. Mar-X in many cases, eliminates the need for chrome plating. Mar-X is processed in Finkl s vacuum arc remelt (VAR...
Journal Articles
Alloy Digest (1979) 28 (9): Bi-13.
Published: 01 September 1979
.... Cerrolow-136 alloy remelts in hot water and is reusable. Lens Blocking: Cerrolow-136 alloy is used in optical manufacturing for lens blocking for buffing and grinding optical lenses and components. Proof Casting: Cerrolow-136 can be used for proof-casting cavities of plastic and rubber molds, forgings dies...
Journal Articles
Alloy Digest (2012) 61 (5): SS-1122.
Published: 01 May 2012
... at a standard hardness of 38 to 42 HRC. See also Table 3. Applications: Formadur PH X Superclean is recommended for tools used in the processing of corrosive plastics; further applications can be found in the aircraft and chemical industries. Molds and mold inserts are typical operational applications...
Journal Articles
Alloy Digest (1981) 30 (5): Bi-24.
Published: 01 May 1981
...: Indalloy 136 is recommended for proof casting cavities of plastic and rubber molds, forgings dies, gun chambers, etc. Proof casting requires factors of low pouring tem- perature and minimum volume change to assure accurate measurements. Also, proof-casting media must initially shrink sufficiently...
Journal Articles
Alloy Digest (1984) 33 (2): Bi-35.
Published: 01 February 1984
... lenses and components. Low-Melting Bolder: Frequently a solder is needed with a melting point substantially lower than that of conventional lead-tin solder. Bismuth-21 In- 18Pb- 12Sn is recommended when a solder is needed with a melting temperature of 136┬░F (57.8 C). proof Casting: Bismuth-2 I In- 18Pb...
Journal Articles
Alloy Digest (2004) 53 (9): SS-909.
Published: 01 September 2004
... Characteristics: The demands placed on plastic mold tooling require mold steels that pos- sess a combination of toughness, corrosion resistance, and the ability to reach uniform hardness levels throughout large cross sections. This alloy is a premium grade stainless tool steel with good corrosion resistance...
Journal Articles
Alloy Digest (2021) 70 (9): Ni-775.
Published: 01 September 2021
... for the auto- of austenitic stainless steels. Thanks to its high ductility, the motive industry; (e) Forms for the production of carbon-fiber chips resulting during machining tend to be string-like and reinforced plastic (CFP), especially for the aerospace indus- tough and can therefore result in fast wear...