Glass-shaping mold and method for manufacturing the same
AssigneeToshiba Kikai Kabushiki Kaisha
InventorsJun Masuda, Takaharu Tashiro, Hisanori Fuwa
Life of this patent
Estimating the term…
Abstract
A glass-shaping mold includes a steel base member, and a crystallized, machined layer, an intermediate layer and a mold-releasing layer which are sequentially formed on the base member. The machined layer is a layer of nickel alloy containing phosphorus. The intermediate layer is a layer formed of chromium, nickel, copper or cobalt. Alternatively, the intermediate layer is a layer of an alloy layer containing at least one of these elements. The mold-releasing layer is a layer of an alloy containing iridium and rhenium.
Claims2
A glass-shaping mold comprising a steel base member, and a crystallized, machined layer, an intermediate layer, and a mold-releasing layer, which are sequentially formed on the base member,
- wherein the machined layer is a layer of a nickel alloy containing a phosphorus in concentration of 1% to 15% by mass,
- the intermediate layer comprises at least one element selected from the group consisting of chromium, nickel, copper, and cobalt;
- and
- the mold-releasing layer is a layer of nickel alloy containing iridium, rhenium and carbon, the carbon concentration being 1 at % to 50 at %.
A method of manufacturing a glass-shaping mold comprising the steps of:
- forming a machined layer on a base member, the machined layer comprising a nickel alloy containing a phosphorus in concentration of 1% to 15% by mass;
- heating the machined layer to crystallize the machined layer;
- working the machine layer with a turning diamond tool subsequent to the heating step;
- and
- forming an the intermediate layer and a mold-releasing layer on the machined layer, the intermediate layer comprising at least one element selected from the group consisting of chromium, nickel, copper, and cobalt;
- and the mold-releasing layer being a layer of nickel alloy containing iridium, rhenium and carbon, the carbon concentration being 1 at % to 50 at %.
Dependencies are inferred from the claim text.