摘要:
A process for manufacturing an ophthalmic lens containing a Fresnel microstructured surface inside the lens. The Fresnel lens is injection molded with a mold insert having a heat conductivity lower than the thermoplastic material used to form the Fresnel lens. A second thermoplastic material is overmolded to the Fresnel lens to cover and protect the microstructured surface. The mold insert is made from Nickel or thermoplastic. The resulting lens includes two layers having different refractive indices. The Fresnel lens is made from polycarbonate while the overmold is made from PMMA or TPU.
摘要:
A carbon foam article useful for, inter alia, composite tooling or other high temperature applications, which includes a substrate, wherein the substrate includes at least one material selected from carbon foam, extruded graphite, graphite foam, and isomolded graphite. The tool may also include a skin as a working surface and a filler disposed below the skin. The tool has a surface roughness of no more than about 63 micro-inches. Such a tool may be used to make a composite prototype part.
摘要:
It is an object of the present invention to provide a functional-container forming method and a molding die which can produce a functional container at a low cost and a high throughput without using a bond, and, a functional container produced by utilizing those. A functional-container forming method for forming a casing part on a bottom-face member having a predetermined functional surface, the functional-container forming method comprising the steps of: forming a protection region that suppresses a deterioration of a function of the functional surface between the functional surface and a molding die; and performing a molding by filling a melted resin in a cavity formed between the molding die and the bottom-face member.
摘要:
The disclosed embodiments include methods of making belts for apparatuses useful in printing and fuser belts for apparatus useful for printing. An embodiment of the methods includes forming a first layer of the belt using a first material comprising a first polymer applied on an inner surface of a mandrel, the first layer including a first outer surface facing the inner surface of the mandrel and a first inner surface; forming a second layer of the belt using a second material comprising a second polymer applied over the first inner surface, the second layer including a second inner surface; and removing the belt from the mandrel.
摘要:
A molding device is provided with a holding portion for clamping the end of an extruded portion, and a cavity for forming a molded portion. The holding portion has holding cores to come in contact with the end of the extruded portion, and at least a part of the holding cores is formed by a material with a low thermal conductivity. Thus, the molding method of a weather strip includes, clamping the end of the extruded portion by the holding portions, then, ejecting or injecting a rubber material for molding the molded portion in the cavity, and then, molding the rubber by vulcanization.
摘要:
A resin molding apparatus capable of enhancing transfer accuracy, reducing the cost of a molding apparatus, and shortening a molding cycle. The resin molding apparatus includes a first mold; a second mold disposed in opposition to the first mold; a transfer plate (34) attached to one of the first and second molds and comprising a transfer surface bearing a pattern of pits and projections and oriented toward a cavity (C1, C2); and a thermal insulation layer (40) disposed between the transfer plate (34) and the one of the first and second molds and formed through growth from the transfer plate (34) side or from the one of the first and second mold sides. Being disposed between the transfer plate (34) and the one of the first and second molds, the thermal insulation layer (40) can restrain dissipation of thermal energy of a molding material toward the mold. This can restrain formation of a skin layer, which would otherwise result from a sharp drop in temperature of the molding material, whereby transfer accuracy can be enhanced.
摘要:
A method of mounting a drug delivery stent on a balloon of a balloon catheter. The method securely mounts the drug delivery stent on the balloon without damaging the drug delivery layer of the stent. In one embodiment, the method generally comprises positioning a drug delivery stent on a balloon of a balloon catheter, and positioning the balloon with the drug delivery stent thereon within a polished bore of a mold formed at least in part of a metallic material. The balloon is pressurized and heated within the mold as the mold radially restrains the stent from expanding, to mount the stent on the balloon without damaging the drug delivery layer of the stent.
摘要:
A replaceable cavity insert for use in a multi-cavity compression mold, wherein each cavity insert is friction fitted into a respective mold recess. Each insert has a substantially semi-spherical insert surface and defined in the surface is an inverted dimple pattern of a golf ball. Each cavity insert has an O-ring recessed in the upper perimeter to limit the flow of heating and cooling fluids beyond the perimeter. The cavity insert and the O-ring are retained in the recess of the frame by a pair of removable cavity retainer screws and washers, which are countersunk into the frame and have an edge of the washer disposed in a cut-out section of the insert. Each cavity insert may be separately and individually removed from the frame by just loosening the retaining screws without the need to remove the entire frame from the press or disconnecting the utility lines leading to the frame.
摘要:
Disclosed is a preferred mold design for producing plastic, injection molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a combination of hardened material components and high heat transfer material components to provide a mold having good wear characteristics, for a sufficiently long useful life, and to enable rapid cooling of the injected preform, in order to reduce the cycle time of an injection and cooling cycle. In some arrangements, the hardened materials may form a portion of the preform cavity thereby slowing the rate of cooling in those areas and inducing a semi-crystalline or crystalline structure in the cooled preform.
摘要:
A molding device is provided with a holding portion for clamping the end of an extruded portion, and a cavity for forming a molded portion. Te holding portion has holding cores to come in contact with the end of the extruded portion, and at least a part of the holding cores is formed by a material with a low thermal conductivity. Thus, the molding method of a weather strip includes, clamping the end of the extruded portion by the holding portions, then, ejecting or injecting a rubber material for molding the molded portion in the cavity, and then, molding the rubber by vulcanization.