Patent application number | Description | Published |
20090108477 | Method of Manufacturing Formed Article, Glass Material, and Method of Determining Shape of Glass Material and Mold - The present invention relates to a method of manufacturing a formed article comprising forming an upper surface of a glass material that has been positioned on a forming surface of a mold to obtain the formed article by heating the glass material to a temperature permitting deformation to bring a lower surface of the glass material into tight contact with the forming surface. Glass having upper and lower surfaces being spherical in shape is employed as the glass material, a mold having a forming surface being a free-form surface other than a spherical surface is employed as the mold, the upper surface of the glass material is formed into a roughly offset surface relative to the forming surface of the mold. The present invention permits the manufacturing of formed articles of desired shape with high precision by hot sag molding method. The present invention also permits the easy and simple determination of the surface shapes of molds and glass materials employed in hot sag molding method. | 04-30-2009 |
20090127727 | METHOD OF MANUFACTURING FORMED ARTICLE, MOLD AND METHOD OF MANUFACTURING THE SAME - The present invention relates to a method of manufacturing a formed article forming an upper surface of a forming material comprised of a thermosoftening substance into a desired shape by positioning the forming material on a forming surface of a mold and heating the forming material to a temperature permitting deformation to bring a lower surface of the forming material into tight contact with the forming surface. As the mold, a mold having, on a forming surface thereof, a plurality of irregularities with a maximum height Rmax ranging from 0.1 to 100 micrometers and an average spacing S between local peaks ranging from 0.01 to 1.00 mm is employed. The present invention further relates to a mold and method of manufacturing the same. According to the present invention, a formed article with a desired shape can be manufactured with high precision and high productivity by hot sag forming method without the occurrence of the fusion between the forming material and the mold. | 05-21-2009 |
20090289380 | METHOD OF MANUFACTURING FORMED ARTICLE, COVERING MEMBER, AND FORMING APPARATUS COMPRISING THE SAME - The present invention relates to a method of manufacturing a formed article forming an upper surface of a forming material comprised of a thermosoftening substance into a desired shape by positioning the forming material on a forming surface of a mold and heating the forming material to a temperature permitting deformation to bring a lower surface of the forming material into tight contact with the forming surface. The forming is conducted while an exposed portion on the forming surface side of the mold upon which the forming material has been positioned is covered with a covering member. The present invention further relates to a covering member and a forming apparatus. According to the present invention, formed articles with a desired shape can be formed with high accuracy by preventing the contamination of upper surface of forming materials by foreign matter during forming. | 11-26-2009 |
20090295033 | METHOD OF MANUFACTURING FORMED ARTICLE, SUPPORT MEMBER, AND FORMING APPARATUS - The present invention relates to a method of manufacturing a formed article comprising forming an upper surface of a forming material comprised of a thermosoftening substance into a desired shape by positioning the forming material on a forming surface of a mold and heating the forming material to a temperature permitting deformation to bring an entire surface of a lower surface of the forming material into tight contact with the forming surface. The positioning of the forming material is conducted by supporting the forming material with a support member so that at least a portion of a lower surface rim portion of the forming material is in tight contact with the forming surface and a center portion of the lower surface of the forming material is separated from the forming surface, and the support with the support member is conducted so that a lower portion of a lateral surface of the forming material is separated from the support member and at least a portion of an upper edge portion of the lateral surface of the forming material is supported by the support member. According to the present invention, a formed article with a desired shape can be manufactured with high precision by hot sag forming method. | 12-03-2009 |
20110127685 | METHOD OF MANUFACTURING LENS CASTING MOLD AND METHOD OF MANUFACTURING EYEGLASS LENS - An aspect of the present invention relates to a method of manufacturing a lens casting mold by introducing a forming mold, with a forming surface on which a glass material being formed is positioned, into a continuous heating furnace and conducting thermal treatment while conveying the forming mold in the furnace to form an upper surface of the glass material being formed by bring a lower surface of the glass material being formed into tight contact with the forming surface. The aspect comprises utilizing a forming mold having a curvature distribution on the forming surface as the forming mold; specifying an average curvature in a direction running from a geometric center toward a perimeter portion of the forming surface of the forming mold in two or more different directions before introduction to the furnace; directly or indirectly measuring a temperature at two or more measurement points on the forming surface of the forming mold in one or two or more regions within the furnace and specifying a direction running from the geometric center of the forming surface toward a point that is of maximum temperature among the two or more measurement points as a maximum temperature direction; continuously or intermittently repeating approximately full circle rotation in a horizontal direction of the forming mold during passage through the furnace; and in the region in which the maximum temperature direction has been specified, the rotation is conducted so that an angular rotation speed of the forming mold decreases as the average curvature in an n | 06-02-2011 |
20110133352 | METHOD OF MANUFACTURING LENS CASTING MOLD - The present invention relates to a method of manufacturing a lens casting mold by introducing a forming mold, with a forming surface on which a glass material being formed is positioned, into a continuous heating furnace and conducting thermal treatment while conveying the forming mold in the furnace to form an upper surface of the glass material being formed into a shape of a molding surface for forming a lens optical surface. The method of manufacturing a lens casting mold of the present invention comprises rotating the forming mold to a right and/or to a left relative to a direction of conveyance of the forming mold in a region within the continuous heating furnace where a temperature of the upper surface of the glass material being formed is equal to or greater than a glass transition temperature of the glass. | 06-09-2011 |
20110163466 | METHOD OF MANUFACTURING LENS CASTING MOLD AND METHOD OF MANUFACTURING EYEGLASS LENS - The present invention relates to a method of manufacturing a lens casting mold in which an upper surface of a glass material being formed is formed into a shape of a molding surface for forming a surface comprising a progressive surface or a progressive element by using a continuous heating furnace. As the forming mold, a forming mold having a curvature distribution on the forming surface is utilized. In one aspect, a temperature of the continuous heating furnace is controlled so that the continuous heating furnace comprises a temperature rising region having a temperature distribution such that the temperature rises in a conveyance direction of the forming mold, and a separation distance between the forming surface of the forming mold and a lower surface of the glass material being formed is specified in two or more spots before introduction to the continuous heating furnace. The forming mold is conveyed in the temperature rising region so that a portion with the greatest separation distance among the specified separation distances is comprised in a portion on a side of the conveyance direction as divided in two by a virtual line, the virtual line running orthogonally to the conveyance direction of the forming mold and passing through a geometric center of the forming surface. In another aspect, a forming mold position control region is provided in the continuous heating furnace, a temperature is directly or indirectly measured at multiple measurement points on the forming surface in the forming mold position control region, and the forming mold is conveyed so that a portion on the forming surface of greatest curvature is present in a high temperature portion that has been determined based on the measurement result. A virtual line A passing through a geometric center and a maximum temperature point among the multiple measurement points is specified, and then a portion containing the maximum temperature point as divided in two by a virtual line B running orthogonally to the virtual line A and passing through the geometric center is determined as the high temperature portion. | 07-07-2011 |
20110274826 | METHOD OF MANUFACTURING POLARIZING MEMBER - An embodiment of the present invention relates to a method of manufacturing a polarizing member comprising forming a polarizing film by coating a dichroic dye-containing solution on an orienting layer, preparing an epoxy group-containing silane coupling agent solution by adding an epoxy group-containing silane coupling agent to an aqueous solvent, coating the epoxy group-containing silane coupling agent solution thus prepared on the polarizing film and then conducting thermoprocessing, and determining the time elapsing between the preparation of the epoxy group-containing silane coupling agent solution and the coating thereof based on change in an average molecular weight of the silane coupling agent in the epoxy group-containing silane coupling agent solution. | 11-10-2011 |
20120086138 | MANUFACTURING METHOD AND MANUFACTURING DEVICE OF FORMED ARTICLE, AND MANUFACTURING METHOD OF EYEGLASS LENS - An aspect of the present invention relates to a method of manufacturing a formed article forming an upper surface of a forming material comprised of a thermosoftening substance into a desired shape by heating the forming material in a state where the forming material is positioned on a forming surface of a forming mold to a temperature permitting deformation of the forming material to bring a lower surface of the forming material into tight contact with the forming surface. The heating is conducted by positioning the forming mold, on which the forming material has been positioned, beneath heat source(s) radiating radiant heat in a state where a plate-shaped member the outermost surface of which is comprised of a metal material is positioned above the upper surface of the forming material. Another aspect of the present invention relates to a method of manufacturing a formed article forming an upper surface of a forming material comprised of a thermosoftening substance into a desired shape by heating the forming material within a heating furnace in a state where the forming material is positioned on a forming surface of a forming mold to a temperature permitting deformation of the forming material to bring a lower surface of the forming material into tight contact with the forming surface. The forming is conducted while an exposed portion on the forming surface side of the forming mold on which the forming material has been positioned is covered with a covering member, and at least a portion of the covering member comprises a metal material layer. | 04-12-2012 |