Abstract: A metal mold for manufacturing amorphous alloy. A metal mold is composed of a lower mold having a portion for fusing metal material and a cavity portion, and an upper mold working with the lower mold which presses molten metal in the portion for fusing metal material and pours the molten metal into the cavity portion to mold. And, surface roughness of a part of or all of an inner surface of the metal mold is arranged to be more than 12 S in JIS indication.

Abstract: A mold assembly for forming an ophthalmic lens, or a lens blank from which one ophthalmic lens is produced by effecting a cutting operation on at least one of a front surface and a back surface of the lens blank, the mold assembly consisting of a first mold having a molding surface and a second mold having a molding surface, which first and second molds are assembled together so as to define therebetween a mold cavity having a profile corresponding to that of the ophthalmic lens or the lens blank, the mold cavity being filled with a polymeric material which is polymerized to form the ophthalmic lens or the lens blank, wherein at least one of the first and second molds is a layered mold which is constituted by a composite sheet comprising a metal sheet layer and at least one resin layer which are laminated on each other, the at least one resin layer of the composite sheet providing the molding surface of the layered mold which partially defines the mold cavity.

Abstract: A mold assembly for molding a thermoplastic resin, which comprises; (a) a first mold member and a second mold member for manufacturing a molded article of a thermoplastic resin, (b) an insert block provided in the first mold member, said insert block constituting part of a cavity, having a thickness of 0.1 mm to 10 mm and being formed of a material having a thermal conductivity of 2.times.10.sup.-2 cal/cm.multidot.sec.multidot..degree.C. or less, and (c) a molten thermoplastic resin introduction portion provided in the second mold member, wherein an insert block covering portion is formed in the second mold member, and when the first mold member and the second mold member are clamped to each other, (A) a clearance between the insert block and the insert block covering portion is equal to, or less than, 0.03 mm, and (B) an amount of overlapping of the insert block and the insert block covering portion is equal to, or greater than, 0.5 mm.

Abstract: A method for molding an optical disk comprises: applying a thermally insulative insert coating to at least one thermally insulative mold insert to provide at least one coated mold insert having a reduced surface roughness; positioning the coated mold insert between a thermally conductive mold form and a portion of a thermally conductive mold apparatus; injecting a molten thermoplastic material into the mold apparatus; retaining the material in the mold apparatus for a time sufficient for the molten thermoplastic material to cool below its glass transition temperature to form the optical disk; and ejecting the optical disk from the mold apparatus. In another embodiment, the mold insert is coated or laminated on the mold form with the mold insert having a coefficient of thermal expansion compatible with the coefficient of thermal expansion of the mold form. In another embodiment, the mold insert is fabricated by being applied, cured, and then removed from a release layer.

Abstract: The present invention relates to a process for preparing solid, microcellular or expanded plastic molded items, characterized in that said molded items are produced in molds in which the internal surfaces consist of steel with the percentage composition:a) Fe: having a wt % greater than 0 wt % and less than 100 wt %;b) at least one element selected from the group consisting of W, Mo, or V, wherein if W is selected, W is present from a range greater than 0 wt % to 40 wt %; wherein if Mo is selected, Mo is present from a range greater than 0 wt % to 12 wt %; and if V is selected, V is present from a range greater than 0 wt % to 5 wt %;c) at least one element selected from the group consisting of Cr, Al, wherein if Cr is selected, Cr is present in a concentration of greater than 0 wt % to 15 wt %; and if Al is selected, Al is present in a concentration of greater than 0 wt % to 15 wt %;d) optionally, carbon at a concentration ranging from 0.1 to 1.5 wt %;e) optionally, cobalt at a concentration ranging from 0.

Abstract: A mold having a cavity for shaping a three-dimensional object, which comprises a photocured resin of a photocurable resin composition comprising(A) a liquid photocurable resin, and(B) at least one reinforcing agent selected from the group consisting of inorganic solid particles having an average particle diameter of 3 to 70 .mu.m and a whisker having an average diameter of 0.3 to 1.0 .mu.m, a length of 10 to 70 .mu.m and an aspect ratio of 10 to 100 and optionally, in which the inner surface of the cavity is covered by a solid film having a thickness of 5 to 1000 .mu.m.

Abstract: A mold assembly for forming a glass sheet includes a mold block having a surface for holding a glass sheet and a fibrous metal liner for covering the surface of the mold block to prevent marking of the glass sheet when held against the mold block.

Abstract: A mold for the manufacture of glass products at least a portion of which consists of a cuproaluminum alloy that contains: 0.02% wt. or more of one or several elements chosen from among Sc, Sr, Y, Zr and Hf, and/or from 0.02% wt. or more of one or several lanthanides. The cuproaluminum alloy is one of a composition comprising 5 to 15% wt. Al, 2 to 7% wt. Ni, 2 to 7% wt. Fe, 0.05 to 1.5% wt. Si, 0.02% to 2% wt. Mn, and at most 0.25% wt. Zn, with the remainder comprising Cu; or a composition comprising 12 to 18% wt. Ni, 1% wt. or less Fe, 0.05 to 1.5% wt. Si, 0.5% to 2% wt. Mn, and 6 to 12% wt. Zn, with the remainder comprising Cu.

Abstract: A mold having a pair of mold halves defining a mold cavity for forming a glass container. There is an inner shell of the mold and an outer shell and a gap therebetween through which cooling gas flows. Heat transfer elements on the inner shell extend laterally outwardly from the inner shell into the gap for contact by cooling gas flowing through the gap thereby to cool the inner shell. The inner shell is formed from a hard material having a working temperature substantially greater than the melting temperature of glass, a heat conductivity of less than about 15 W/m-deg K, and a capability of generating at temperatures in excess of about 500.degree. C. a protective oxide film strongly adhered to the inner shell surface.

Abstract: In the production of castings from a melt of a reactive metal selected from the group consisting of titanium, titanium alloys, and titanium-based alloys, a reusable casting mold (20) is used; the mold, at least in the area of the surface which comes in contact with the melt, consists of at least one metal selected from the group consisting of tantalum, niobium, zirconium, and/or their alloys. The casting mold (20) preferably consists, at least in the area of the surface which comes in contact with the melt, of a tantalum based alloy containing at least 50 wt. % of tantalum. The casting molds can be made of a homogeneous metal, but it is also possible to insert shells of the metals in question into a base body to form the boundaries of the mold cavities, whereas the base body itself consists of some other metal or alloy or of a nonmetal such as graphite or silicon nitride.

Abstract: A chill vent made of copper or copper alloy has a concave section and a convex section, each being subjected to removal of flat parting portions on both side surfaces, and a gas exhaust passage is formed over the entire width region. These gas exhaust passage portions have side surfaces and back surfaces which are enclosed in hard U-shaped guide frames. It is possible to effectively avoid occurrence of leakage or flashing of molten metal due to a plastic deformation of the chill vent by a mold fastening force applied upon assembly of a die-casting mold, which may occur when a copper or copper alloy having a superior cooling property as the material for chill vent.

Abstract: A chill vent is provided with a cooling pipe around a zigzag-shaped gas exhaust passage, and made of a Be--Cu alloy which is superior in cooling power. An accelerated solidification of non-solidified molten metal entering into the chill vent is achieved, thereby effectively preventing flashing of the molten metal without complicating the construction or increasing the size of the entire facility.

Abstract: A molding apparatus for molding an optical component comprises first and second mold sections (20-26, 34) forming opposite sides of a mold cavity (40). The mold cavity has a peripheral edge (43) contacting the optical component during the molding process which is made to reduce the transfer of heat through the peripheral edge (43). In one embodiment of the invention, the peripheral edge is made from a titanium alloy (56) having thermal conductivity approximately 50% of a thermal conductivity of stainless steel. In another embodiment of the invention, the peripheral edge of the mold is made from a porous titanium material (56a) having a density substantially less than the solid titanium alloy. In a further embodiment of the invention, the peripheral edge of the mold is made from a polyimide (70) having oxygen atoms implanted in its surface.

Abstract: A gate portion constituting a gate of a resin molding die is made of a hard alloy having a hardness greater than the predetermined hardness in the iron-based hard alloy used to from a cavity block and a center block. Opposing surfaces of the cavity block halves include a silicone rubber layer at least at the portions thereof which contact portions of the lead frame in a semiconductor encapsulation molding apparatus.

Abstract: The two sides of a multiple cavity mold having electroformed mold cavities for molding intraocular lenses with integral haptics are made by a preferred electroforming procedure involving the use of either a single primary master having a single cavity corresponding to the portion of the lens at either side of its median plane transverse to its optic axis if the lens to be molded is symetrical about both this transverse median plane and its longitudinal median plane containing the optic axis, or a pair of primary masters having single cavities, respectively, corresponding to the portions of each lens at opposite sides of its transverse median plane if the lens is unsymmetrical about either plane.

Abstract: Articles having a diamond-like protective film formed thereon, each comprising a substrate of a material selected from the group consisting of alloys containing at least Co, Ni, or Fe, ceramics, and glass and which has only a slight affinity for a diamond-like thin film, an Mo film formed on the substrate, and a diamond-like thin film formed further thereon. Such articles are manufactured by a method which comprises holding a grid made of Mo close to the surface of the substrate, bombarding the grid and the substrate surface with a bombarding gas consisting of inert gas atoms of Ar or the like, thereby removing contaminants from the surface and depositing Mo atoms on the substrate surface to form an Mo film thereon, ionizing a low-molecular-weight hydrocarbon or a feed gas capable of producing a low-molecular-weight hydrocarbon upon decomposition or reaction, and then accelerating the resulting ions and depositing the same on the Mo film to form a diamond-like film thereon.

Abstract: A mold tool (40) includes a lower platen (10) and an upper platen (18) which have modified surfaces (16) and (20), respectively. The modified surfaces are formed by implanting an implant species (14) at least into areas of the platens which will be in contact with a molding compound resin. By modifying the surface of the molding tool by ion implantation, the need for cleaning the mold tool is reduced due to lower surface friction and wettability of the modified surfaces. These surface characteristics also facilitate easier release of the molded package from the tool. At the same time, wear resistance of the mold tool is improved due to increased surface hardness.

Abstract: A method for fabricating a model includes the steps of stacking successive layers of aluminium honeycomb core to a desired height to form a block, machining the block to within a desired tolerance of the desired final contour, applying a layer of modeling material such as syntactic epoxy to the outer surface of the block, and machining the layer of modeling material to the desired contour. The result is a model from which a mold or composite parts can be fabricated, using high temperature and pressure processes if desired.

Abstract: There is provided a mold die set for molding a package body which is composed of a lead frame and a semiconductor chip mounted on the lead frame, and the lead frame has a hole. The mold die set is composed of an upper mold die and a lower mold die and the package body being clamped by the upper mold die and the lower mold die. The lower mold die includes a runner section, a table section connected to the runner section and protruding from a bottom of the runner section, a lower concave section connected to the table section, and a lower gate disposed between the table section and the lower concave section.

Abstract: A method is disclosed for the production of a molded article, using a mold assembly including a mold having a cavity, for producing a molded article from a thermoplastic resin; an insert block formed of ceramic or glass having a thermal conductivity of 2.times.10.sup.-2 cal/cm.sec..degree.C. or less, the insert block being disposed inside the mold, constituting part of the cavity, and having a thickness of 0.5 mm to 10 mm; and a cover plate for covering a peripheral portion of the insert block. The cover plate is attached to the mold and constitutes part of the cavity, wherein a clearance between the insert block and the cover plate is 0.001 mm to 0.03 mm, an amount of overlapping of the insert block and the cover plate is at least 0.1 mm. The method includes filling a molten thermoplastic resin in the cavity, and then cooling the thermoplastic resin to solidness.

Abstract: A composite torroid forming cup for an automated torroid-forming apparatus has a molded plastic upper closure and a bottom reinforced cup section. The upper closure has a hinge pin and an upper non-stick partial torroid forming surface. The bottom reinforced cup section has a substantially rigid reinforcing subframe and a plastic outer body portion that may be molded about the subframe. The bottom reinforced cup section has a bottom non-stick, partial torroid-forming surface. A method of making a composite dough torroid forming cup has several steps. A flat reinforcing plate is perforated with a plurality of apertures, and studs are spot-welded in a spaced relation onto the reinforcing plate. The reinforcing plate is positioned on a forming die and is formed thereon. The reinforcing plate is positioned in a mold, and plastic is molded about the reinforcing plate to form a reinforced bottom cup section.

Abstract: A die for press-molding glass optical elements which can press-mold glass optical elements having high melting points and various shapes repeatedly, which includes a base material having high strength on which a cutting layer having heat resistance and free cutting machinability is formed. After cutting the cutting layer into the desired shape with high accuracy, the die is coated with a surface protective film.

Abstract: A mold for producing molded concrete items is disclosed. The mold includes a mold frame; a plurality of spaced apart mold cavities contained within the mold frame for receiving concrete and forming of individual concrete items upon curing of the concrete received therein; and an elastic casting material positioning the plurality of spaced apart mold cavities within the mold frame while permitting movement of the mold cavities within the mold space with the elastic casting material contacting side walls of the mold and filling spaces between the spaced apart mold cavities and contacting outer walls of the spaced apart mold cavities.

Abstract: A mold assembly with micro-sized features in which the hollow portion thereof is fabricated from a sacrificial mandrel which is surface treated and then coated to form an outer shell. The sacrificial mandrel is then selectively etched away leaving the outer shell as the final product. The sacrificial mandrel is fabricated by a precision lathe, for example, so that when removed by etching the inner or hollow area has diameters as small as 10's of micros (.mu.m). Varying the inside diameter contours of the mold can be accomplished with specified ramping slopes formed on the outer surface of the sacrificial mandrel, with the inside or hollow section being, for example, 275 .mu.m in length up to 150 .mu.m in diameter within a 6 mm outside diameter (o.d.) mold assembly. The mold assembly itself can serve as a micronozzle or microneedle, and plastic parts, such as microballoons for angioplasty, polymer microparts, and microactuators, etc., may be formed within the mold assembly.

Abstract: A lightweight thermally responsive mold for use with a resin transfer molding process is provided. The mold includes first and second support frames including a plurality of upstanding intersecting support ribs. First and second substrates are supported by the first and second support frames, respectively, for carrying heating tubes therein. First and second hard shells are supported by the first and second substrates, respectively. The shells cooperate to form a mold cavity therebetween. Each shell is less than approximately 10 mm thick in order to provide a low thermal mass and high thermal responsiveness.

Abstract: A gate portion constituting a gate of a resin molding die is made of a hard alloy having a hardness greater than the predetermined hardness in the iron-based hard alloy used to form a cavity block and a center block. Opposing surfaces of the cavity block halves include a polytetrafluoroethylene layer at least at the portions thereof which contact portions of the lead frame in a semiconductor encapsulation molding apparatus.

Abstract: In the production of castings from a melt of a reactive metal selected from the group consisting of titanium, titanium alloys, and titanium-based alloys, a reusable casting mold (20) is used; the mold, at least in the area of the surface which comes in contact with the melt, consists of at least one metal selected from the group consisting of tantalum, niobium, zirconium, and/or their alloys. The casting mold (20) preferably consists, at least in the area of the surface which comes in contact with the melt, of a tantalum based alloy containing at least 50 wt. % of tantalum. The casting molds can be made of a homogeneous metal, but it is also possible to insert shells of the metals in question into a base body to form the boundaries of the mold cavities, whereas the base body itself consists of some other metal or alloy or of a nonmetal such as graphite or silicon nitride.

Abstract: A ring-cake preparation system is adapted for use in association with a ring-cake and a ring-cake container. The ring cake container is formed in a cylindrical configuration. A plate with a post is positioned within the cake container. The apparatus includes at least one disc formed in a planar circular configuration with a circular aperture at its approximate center point. The diameter of each circular aperture measures between about eighteen and twenty percent of the diameter of each disc. Each circular aperture is adapted to permit the passage of the post of a ring cake container. At least one rim is formed in a cylindrical configuration and is positioned around the periphery of each disc. The rim is positioned in a perpendicular orientation with respect to the plane of the disc. The width of the rim measures between eight and twelve percent of the diameter of the disc. The disc intersects the rim at its approximate center point.

Abstract: A method of manufacturing an open top, walled member for containing a molten metal, including the steps of forming an inner wall of a mold with a metal sheet and an inner lining covering the sheet, wherein the inner wall defines an inside surface of the walled member and transferring a casting compound between an outer wall of the mold and the inner lining of the inner wall to form the walled member. The metal sheet and inner lining are then removed to allow one to apply heat to dry the casting compound. In the case where the metal sheet includes a plurality of openings, one may also retain the inner wall during the heating step. The heat to dry the casting compound is applied to the inner lining to a sufficient temperature to melt the inner lining and uncover said openings of the metal sheet. The metal sheet is removed when the casting compound is dried.

Abstract: A multilayered insulated mold structure for forming textured articles is disclosed. An insulation layer is deposited on the mold core and a multilayered skin layer is deposited on the insulation layer. The skin is formed of a plurality of sublayers, including a corrosion-resistant phosphorous-rich nickel region on the insulation layer acting as an etchant stop, and an non-corrosion resistant, or etchable, phosphorous-poor nickel region on the corrosion-resistant layer. The upper layer is uniformly textured by selective etching down to a depth terminating at the interface between the layers, but the insulation layer is protected. A method of molding uniformly textured articles is also disclosed, as is a method of making a mold suitable for producing uniformly textured articles and a method for making such a mold surface having bulk imperfections.

Abstract: There is provided a reproducible molding die comprising a base structure having an unevenness pattern, and a cleaning layer disposed on the surface of the base structure having the unevenness pattern, wherein the cleaning layer is removable while substantially retaining the unevenness pattern of the base structure. By using above-mentioned molding die, a possible molding residue left in a molding step can easily be removed together with the cleaning layer.

Abstract: An apparatus and method for producing an optical recording medium or an optical recording medium substrate sheet forms an photo-curable resin layer on at least one of a substrate sheet and a stamper which undergoes elastic deformation. The stamper bears a pattern corresponding with preformatting information and is brought into close contact with the substrate sheet wherein the photo-curable resin layer is interposed between them and cured.

Abstract: For a steel mold, one or more titanium melt inlet-forming members are provided for cooperating with the steel mold members to form an melt ingate that communicates to the mold cavity for supplying the melt thereto in a manner to avoid harmful iron contamination of the melt during casting. The mold body-to-mold cavity volume ratio is controlled between 10:1 to 0.5:1 to minimize casting surface defects and mold wear/damage.

Abstract: A concrete form a part of which is made of a fiber-reinforced thermoplastic resin, said fiber-reinforced thermoplastic resin satisfying the following conditions:Tt(C).gtoreq.Tt(M)-1.5.alpha.15.ltoreq.Tt(c)wherein Tt(C) (%) is total transmittance of the fiber-reinforced thermoplastic resin measured at the thickness of top board, .alpha. (% by weight) is fiber weight fraction of the fiber-reinforced thermoplastic resin, and Tt(M) (%) is total transmittance of the matrix resin measured at the same thickness as above.

Abstract: An injection-molding metal mold used for injection-molding a body having a precision portion which is formed at high precision includes a molding cavity in which a precision molding portion for molding the precision portion is set to have a heat conductivity higher than that of general molding portions for molding other portions of the body and shortens the time required by a molding cycle to mold a body having a precision portion. Also, an injection-molding metal mold used for injection-molding a body having a precision portion which is formed at high precision includes a molding cavity constituted by a molding member in which a precision molding portion is formed to mold the precision portion and general molding portions for molding other portions. Also provided is an ejector pin, disposed adjacent to the molding member to partially constitute the cavity; for ejecting a molded body; and a cooling unit for cooling the molding member through the ejector pin.

Abstract: A multilayered insulated mold structure for forming textured articles is disclosed. An insulation layer is deposited on the mold core and a multilayered skin layer is deposited on the insulation layer. The skin is formed of a plurality of sublayers, including a corrosion-resistant phosphorous-rich nickel region on the insulation layer acting as an etchant stop, and an non-corrosion resistant, or etchable, phosphorous-poor nickel region on the corrosion-resistant layer. The upper layer is uniformly textured by selective etching down to a depth terminating at the interface between the layers, but the insulation layer is protected. A method of molding uniformly textured articles is also disclosed, as is a method of making a mold suitable for producing uniformly textured articles and a method for making such a mold surface having bulk imperfections.

Abstract: Improved optical disks for information storage and holographic imaging, and optical lenses and reflective optical elements are among the difficult-to-mold thermoplastic products which require precision replication of the molding surfaces, in micro detail. By heating (with circulating heat transfer fluids supplied by a hot side reservoir) these mold surfaces to a temperature setpoint sufficiently high to retard solidification and premature viscoelastic skinning of the molten thermoplastic injected into the mold cavity, superior quality molded surfaces can be formed by the plastic, which is then rapidly cooled to solidification (by circulating heat transfer fluids supplied from a cold side reservoir).

Abstract: An elastomeric member is incorporated between a conductor and a conductive interconnection bridge. This elastomeric member serves as a spring providing compliance to an interconnection so that the flatness requirements of an opposing mating structure may be relaxed. A flat metal mandrel is provided with an elongated curved depression extending across a predetermined region where a resilient interconnection bridge is to be located. A nonconductive layer of Teflon is bonded to the surface of the mandrel. Grooves are ablated in a predetermined configuration down to the conductive surface of the mandrel using an excimer laser and a computer-controlled x-y table. Fineline electrical circuits are electrodeposited into the ablated grooves. The elongated curved depression is filled with a silicone material. The silicone material is permitted to cure to form a compliant elastomeric member having the shape of the elongated curved depression.

Abstract: A metal casting die, and a method for its production, are described. By the method the die has provided over at least a part of its internal cavity forming surfaces, indentations of predetermined depth, area and distribution, by employing a technique selected from the group comprising photoetching, electrochemical etching and grit blasting. The die cavity forming surfaces also have thereon, over at least those surfaces with indentations, a coating of a hard, corrosion and erosion resistant material which extends into and between each indentation as a continuous layer.

Abstract: An aluminum-silicon alloy having excellent mechanical characteristics is formed by pressure casting of a molten material concurrently with modifying thereof by a flux which includes at least one element selected from the group of Na, Sb, Sr, and/or Ca, allowing a substantially fine grain of silicon to be dispersed in the alloy. Alternatively, the step of the pressure casting is replacable by substantial uniform cooling of the molten material regardless of a thickness thereof by cooling a die having a mold formed of a Cu-W type material, which mold corresponds to a substantially thick portion of the alloy.

Abstract: A coated tool or instrument has a wear-resistant hard coating (7) which is preferably titanium nitride for working organic material which is disposed on a separating layer (9) applied on a basic body (3). The separating layer (9) comprises a ceramic electrically non-conducting material. Such a material is preferably an oxide, nitride or oxynitride of silicon. The separating layer (9) protects the basic body (3) of the tool or instrument of e.g. a non-corrosion resistant steel. During the coating of the basic body (3) with the ceramic material, a pulsating dc voltage is applied to the basic body (3) or its holders. The pulse height is changed during the vapor deposition from high negative values to low negative values.

Abstract: There is provided a cast molding die for an information recording medium, having a mold surface with a prescribed unevenness pattern including a projection; wherein the projection has at least one pair of opposite side slopes each of which forms an acute angle with respect to the extension of the mold surface. By using the cast molding die having the above-mentioned projection with a three-dimensional shape, a defect such as lack in the resultant information recording medium is prevented.

Abstract: An apparatus used in connection with the construction of a duroplastic, fiber-reinforced article a fibrous web which includes continuously impregnating the web under subatmospheric pressure with a liquid, curable resin composition whose viscosity is gradually increasing. The prepreg thus obtained is covered on both its major surfaces by thin polymer sheets, then cut into the desired length, vacuum molded, pre-cured in the mold and finally cured outside the mold. Construction parts, car parts and boat bodies may thus be produced.

Abstract: A mold for plastic bottles is designed to have an internal arithmetic average of roughness height of a cavity-forming wall to be less than 0.25 .mu.m. The mold has air passages for decompressing air in the cavity and absorbing the air between the wall and a parison expanded by blowing into it. The mold has air suction passages around the mouth portion of the mold and between the main body and the bottom portion of the mold. The surface of the bottle and the molds have so little air stagnated between the mold and the bottle wall that the resulting bottle results in a high gloss.

Abstract: A bimetallic cylinder of steel having an alloy inlay which includes chromium boride in a matrix of iron alloy containing carbon, silicon, nickel and copper. The chromium boride imparts wear resistance to the inlay and relatively high contents of chromium, nickel and silicon and the presence of molybdenum and copper in the alloy make it resistant to corrosion. The cylinder is useful for injection molding and extrusion of plastics.

Abstract: A multilayered insulated mold structure is provided. An insulation layer provided on each of the mold cores retains heat at the molding surface, thereby increasing surface quality of the finished part. The insulating layer has a varying density across its thickness so as to have a low density center region and high density surface regions. By having a relatively low denisty, the center region of the insulating layer has a low thermal conductivity. Thus, the insulating layer may be made from the same material as the core and still have an acceptable insulating value. The use of the same material for adjacent layers reduces the potential of delamination of the layers. The multilayered mold is compatible with passive or active heating of the molding surface.

Abstract: A nickel shell for molds formed by nickel vapor deposition having incorporated therein a combination steel parting line and manifold and a plurality of heating and cooling lines operatively connected to the manifold for the flow of heating or cooling fluid therethrough, said heating and cooling lines, and other mold components such as injection nozzles and mold vents, being encapsulated within the nickel shell.

Abstract: A method and device for fabricating posts made of concrete having a polygonal cross-section includes the steps of providing and opening an integral liner, applying backing panels to the liner, holding the panels together with a hooping means, and pouring and hardening concrete in the integral liner. The liner is collapsible and preformed to open in the shape of a right prism with an internal section identical to that of the post to be manufactured. Backing panels made of cardboard or plastic material support the external faces of the liner and entirely cover the external faces of the liner. At least one of the backing panels is adhered to an external face of the liner. A hooping means holds the liner and the backing panels assembled in mutual contact during the use of the device.

Abstract: An iron-based inlay alloy composition for high pressure injection molding of plastics. The composition includes carbon, chromium, molybdenum, tungsten and vanadium, and may be used as an inlay for bimetallic cylinders for injection molding plastic at pressures above 40,000 psi.

Abstract: In order to increase the performance of a mold of thermosetting resin, metal powder is dispersed in the resin mold which has a dense and voidless structure. The mold may be mounted on a back-up member of metal. In this case, the bonding between the mold and the back-up member is much assured when metal balls are contained in the mold near the back-up member. Furthermore, the mold may be electrically metal-plated. In this case, the mold is coated with a conductive plastic paint before being subjected to the electric metal plating in an electrolytic solution.