Abstract:
In one aspect, a pressing unit is provided, comprising: a mold and a plunger, and a coating configured on at least one of: the surface of the mold and/or the surface of the plunger, where the coating is configured adjacent to the areas where molten or hot glass or glass ceramic touches; wherein the coating comprises: a mold release coating, configured as the gob-contacting surface, wherein the mold release coating comprises: at least two solid lubricants selected from tungsten disulfide, boron nitride, glassy carbon and graphite; and a thermal barrier coating comprising barrier material components and an organo-silica binder.
Abstract:
Various embodiments provide a mold including a pyrolytic carbon film disposed at a surface of the mold. Various embodiments relate to using a low pressure chemical vapor deposition process (LPCVD) or using a physical vapor deposition (PVD) process in order to form a pyrolytic carbon film at a surface of a mold.
Abstract:
A powder useful for making a mold utilized for shaping glass-based materials includes at least about 50% by weight nickel. Metal oxides that are not miscible with nickel may be dispersed within the powder in an amount in a range from about 0.2 to about 15% by volume. A mold made from the powder may have a mold body having a composition comprising at least 50% by weight nickel and a metal oxide that is not miscible with nickel in an amount in a range from about 0.2 to about 15% by volume, a nickel oxide layer on a surface of the mold body wherein the nickel oxide layer has first and second opposing surfaces, the first surface of the nickel oxide layer contacts and faces the surface of the mold body, the second surface of the nickel oxide layer includes a plurality of grains, and the plurality of grains has an average grain size of about 100 μm or less.
Abstract:
An apparatus for forming 3D glass for a smart phone, including a lower mold set including a first lower mold 52A and a first upper mold 50A having a cavity in which curved glass is formed between the first lower mold and the first upper mold when the first lower mold and the first upper mold are coupled, an upper mold set including a second lower mold 52B and a second upper mold 50B having a cavity in which curved glass is formed between the second lower mold and the second upper mold when the second lower mold and the second upper mold are coupled, and a plurality of support pins 60 supporting the upper mold set in the state in which the upper mold set has been spaced apart from the lower mold set at a specific interval.
Abstract:
In a glassware forming machine, a mold is moved to and from a work position by a device having a supporting structure connected to an overhead frame of the machine; a gripping head for engaging the mold; a cable transmission having a cable operated by a winch and connected to the gripping head to move the gripping head to and from the supporting structure in a substantially vertical direction; and a powered articulated arm connected to the gripping head and to the supporting structure to exert substantially horizontal forces on the gripping head.
Abstract:
Disclosed is a lower molding die that can well prevent the occurrence of an air bubble without narrowing the range of choice for materials for the lower molding die and, at the same time, is highly durable. Also disclosed is a method for manufacturing a molding die for molding molten glass droplets. The method comprises a step of machining a molding surface of the molding die, a polishing step of polishing the molding surface to an arithmetic average roughness (Ra) of not more than 10 nm after the machining step, a step of forming at least one cover layer on the surface of the molding surface after the polishing step, and a step of roughening the surface of the cover layer formed on the molding surface.
Abstract:
A method of manufacturing a glass substrate for a storage medium by pressing a glass material between an upper and a lower dies. The method includes a heating step of heating the glass material arranged between the upper and lower dies, a pressing step of pressing the heated glass material via the upper and lower dies, and a cooling step of having, after the pressing step, a cooling member contact the upper and lower dies to cool them together with the molded glass material arranged between the upper and lower dies. During the heating step and the pressing step, a vacuum atmosphere is maintained in a space containing the dies and the glass material. When the pressing step has completed, an inert gas is filled in the space to set a pressure in the space equal to an ambient pressure.
Abstract:
A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: 1. compacting metaloxide or metalloidoxide to granules having a mean particle size of less than about 1 millimeter; 2. optionally fully sintering the granules to produce high purity, artificial sand; 3. casting the artificial sand by conventional techniques, such as, slip casting, to form a high density, porous, green body; 4. optionally drying and partially sintering the green body; 5. optionally fully sintering the green body under vacuum; and 6. optionally hot isostatic pressing the green body.
Abstract:
A glass forming mold comprising a mold having a molding surface, a chromium coating film formed on the molding surface and a silicon oxide film formed on the surface of the chromium coating film.