Abstract: Disclosure is a metal mold for forming a transparent-resin-sealed semiconductor element which, when the molding is removed from it with knock-out pins, will not rub the molding mirror surface of the light transmitting window of the resin package, thus permitting the removal of the molding with the molding mirror surface maintained as it is. In the metal mold for a transparent-resin-sealed semiconductor element which is formed by sealing a semiconductor photo-electric element mounted on a lead frame in a rectangular-parallelepiped-shaped transparent resin package having a light transmitting window on its front end, the cavity surface of the upper die (a cavity block) which corresponds to the light transmitting window has a draft angle .theta.

Abstract: A form system and method is provided that is capable of molding pre-cast, structural wall panels of different lengths, widths, thicknesses and architectural finishes for a variety of different types of wall systems.

Abstract: The body part mold system includes a method of making accurate replicas of body parts, with the steps of the method comprising using an elongate prefabricated hollow transparent support form having an opening at one end and a slit on one side, inserting the body part through the opening into the form, sealing the slit so as to be leak-proof, pouring into the support form a liquid molding material containing alginate that rapidly sets to form a gelatinous matrix containing a negative impression of the body part, releasing the body part from the mold to leave a negative impression of the body part, casting a replica of the body part in the mold, and removing the replica from the mold. The method yields accurate replicas of body parts for medical, artistic, and other uses. The support forms may be either rigid or somewhat flexible, and are reusable. The transparency of the support forms permit precise positioning of the model or patient and monitoring of the filling of the form with molding material.

Abstract: An improved electrical insulator for high voltage transmission lines is formed from certain polymer-based concrete compositions. An apparatus provides for the molding of the polymer-based mixture to form a highly degassed product. The method and apparatus include the ability to combine the constituents of the mixture in a mixer. A vacuum is applied to the mixture to degas the mixture. A mold is filled with the degassed mixture without introducing air thereinto in the absence of a vacuum. The resulting insulator has highly reduced air entrainment.

Abstract: Process and apparatus for molding the front and rear surfaces of a contact lens in one step is disclosed. Two mold halves matable to form a contact-lens-shaped cavity and a cavity for excess lens forming material surrounding the cavity are provided. The improvement comprises providing the cavity for excess lens forming material with at least two openings and producing differential gas pressure across the openings to remove excess lens forming material.

Abstract: A semiconductor sealing mold for sealing a semiconductor element within a thermosetting resin is provided with resin inflow openings formed in oppositely and substantially symmetrically opposed relation to the active surface and back surface of a lead frame connected semiconductor element. As a result, the application of the molding process and method of encapsulation of the semiconductor element can be accomplished under conditions of uniformly applied pressure to opposite surfaces of the semiconductor element and extending outwardly in all radial directions from the center of the semiconductor element. Furthermore, since the bonding wires and lead frame leads are substantially aligned in the same radial directions from the center of the semiconductor element, damage does not occur to these wires or leads during the molding process.

Abstract: A mould bar frame for making composite blocks has mould bars for supporting a plurality of individual moulds side by side. Each individual mould has end core liners at each end and divider plates both liners and plates cooperating with the mould bars. The end core liner may be made of two separable elements one of which is reversible to reduce wear. A plurality of lugs on each end of a divider wall ride in corresponding grooves in the mould bars to reduce wear.

Abstract: A method of making a mold assembly for molding inner and outer shells of an equipment shelter utilizes a generally rectangular frame on which are supported a plurality of large flat panels formed of plywood and covered by thin sheets of stainless steel. The panels are separated by rib gaps on the sides and corner gaps at the corners which are closed by temporary, wooden rib and corner patterns. A reinforced plastic laminate is applied to the temporary patterns to form negative molds. When cured, the negative molds are removed from the frame, along with the temporary patterns. A reinforced plastic laminate is applied to each of the negative molds and cured to form permanent rib and corner molds. The permanent molds are positioned in their respective rib and corner gaps to complete the mold assembly.

Abstract: A ramp for the physically challenged includes three different types of sectional portions: a slab disposed at the interface of a level surface such as a floor or earth ground; one or more ramp portions, each having a sloping upper surface, disposed adjacent to one another; and a switch platform having a level upper surface. Forms used to fabricate the three different types of sections are provided. A form for fabricating the sloping ramp portion includes a bulkhead, outer panels, and a set of inserts having varying height. The inserts are used to vary the resulting depth of the side panels of the concrete ramp portions. An upper surface of the bulkhead is sloped downwardly in a plane parallel to that of the upper surface of the concrete ramp portion. Apparatus is provided to elevate the front portion of the assembled form so as to place the upper surface of the bulkhead in a horizontal plane that is parallel to the plane of the level surface upon which the form rests.

Abstract: A mold assembly includes first and second mold sections having respective first and second mold cavity defining surfaces, the first mold cavity defining surface terminating in an encircling peripheral rim and the second mold cavity defining surface terminating in a deformable peripheral annulus disposed at a diameter corresponding to the rim, and cooperating tapers depending from each of the first and second molds for relatively centering the molds.

Abstract: An apparatus for molding a soft ophthalmic lens, having a male and female portion, one having around the periphery of the optical surface a knife edge and one containing a rim bushing peripherally exterior to the knife edge. The two portions are mated so that the knife edge deformably penetrates the other portion. Excess material is expelled from the mold cavity and separated from the lens by a region of prepolymer discontinuity defined by the rim bushing contact area. The mold portion containing the rim bushing is produced by using a cylindrical insert and an annular sleeve machined to have the rim bushing on the surface of one end.

Abstract: A method for forming a 360 degree integral skin handle in a thermoplastic part for use in automotive trim products includes the steps of forming a mold with a partial recess with raised side ribs joined to a removable plug with raised side ribs and thereafter selectively directing heat from a first source through the mold and from a second source through the plug to form a completely closed, curved, heated tube surface and thereafter casting thermoplastic material against the curved, heated tube surface to fuse and cure a layer of material thereon in the form of a tube skin segment which is releasable from the mold when the plug is removed. Apparatus for practicing the method includes a mold with a recess therein and a plug is supported on the mold for movement into a position for closing the tube surface and into a demolding position for releasing the molded part. The raised side ribs combine to form spaced parallel recesses in the tube to form an inner surface on a 360.degree. with a smooth feel.

Abstract: Overall production line equipment is utilized in producing many large concrete panels, in an initial horizontal position, during each day of many operational days, with these panels preferably being later installed vertically with other like panels to form a sound barrier alongside a vehicle way. Each concrete panel has its own integral pilasters at respective edges, in turn having respective tongue and groove edges; respective patterns and color accents on each side, with the pattern on the then top side being formed by using a rockable stamp subassembly, mounted on a cart; reinforcing throughout the panels, inclusive of the integral pilasters; lifting subassemblies; and anchoring subassemblies, adapted to be later mated with a receiving subassembly anchored in a concrete footing, located where the panel with other panels forms a sound barrier alongside vehicle ways.

Abstract: A mold, adapted for resin transfer molding of composite articles, that has a seal for maintaining a vacuum resulting in denser composite parts. A mold body has at least two openings including an opening for removing the article therethrough. There are at least two mold closures adapted for closing the openings and two of the mold closures are in mutual contact within the interior of the mold. A seal is disposed between each closure and the mold body for sealing each mold closure to the mold body to continuously seal only a single surface. The mold has an improved seal for initiating and maintaining a vacuum thus reducing part porosity.

Abstract: Split dies include an upper die and a lower die for casting small segments constituting tread pattern forming portions of a tire mold. The lower mold includes a telescopic die having an upper surface forming a die bottom wall having a configuration corresponding to the tread pattern forming portions of the small segments. The lower mold further includes a main die having a cavity for receiving the telescopic die and having side walls surrounding the cavity to form die inner walls whose configuration corresponds to side walls of the small segments.

Abstract: A mold assembly for making an ocular device such as a contact lens, an intraocular lens or a lens blank has three pieces which include a sleeve, a first mold segment and a second mold segment. The first mold segment includes a peripheral skirt which extends away from a mold cavity and which terminates in an end portion which is in interference fit engagement with the sleeve for establishing a leak-resistant fluid seal.

Abstract: A method and apparatus for precision molding soluable polymers is disclosed, in order to form an exact and precisely shaped product, such as contact lenses and surgical implants. A preferred mold for forming contact lenses includes a female part having an indentation and a sharp circumferential edge surrounding the indentation. The mold also includes a male part which is adapted to contact the sharp circumferential edge of the female part to form the molding cavity between the indentation of the female part and the male part. A semi-permeable gate is formed between the female part and the male part for introducing coagulating fluid into the molding cavity while preventing the escape of the polymer solution from the molding cavity. The semi-permeable gate allows the diffusion of the coagulating fluid into the molding cavity at a faster rate than the rate of diffusion of solvent out of the molding cavity.

Abstract: A system for molding concrete articles such as paving stones, including a rack having opposing first and second vertical walls that have corresponding rails, and trays that include article molds adapted to receive concrete for curing, the trays being sized and constructed to slide on the rails.

Abstract: An assembly for molding an ocular lens blank which may be lathed into a contact lens or intraocular lens includes a sleeve, and a first and second mold segment placed within the sleeve. After a lens blank is molded in a space between the two segments and the sleeve, the two segments are removed from the sleeve and the second mold segment then functions as a holder for the lens blank during a lathing operation. The second mold segment has an outer cylindrical surface for gripping by a collet, and also has an internal frustoconical recess for a mounting pin, and thus can be used with a variety of lathes known to the optical industry.

Abstract: A preform assembly for use with a resin transfer molding apparatus. The preform assembly comprises an upper liner formed to the shape of a first mold half, the upper liner having a peripheral portion, a dry fabric preform, and a lower liner formed to the shape of a second mold half, the lower liner having a peripheral portion. The preform is sandwiched between the upper liner and lower liner to form the preform assembly having peripheral portions which extend beyond the preform to form a sealing area. The upper liner is sealed to the lower liner at the sealing area. The preform assembly facilitates the loading of the preform into a molding apparatus as well as facilitating the handling and storage of the preform prior to and subsequent to molding. Methods of making the preform assembly, as well as a composite article, are also disclosed.

Abstract: A mold for molding a skin covered foamed plastic article capable of dealing with those foamed plastic articles having large curving portions without complicating the manufacturing process relating to the attachment of the skin member on the mold, without a leakage of liquid formed plastic to be poured over the mold. The mold includes a lower mold, over which a skin cover is to be placed, and on which liquid foamed plastic is to be poured onto the skin cover, the lower mold having; a fixed part on top of which the upper mold is to be placed; a movable part which makes contact with the fixed part at a lowered position at which there is a closed space between the fixed part and the movable part; and means for controlling air pressure inside the closed space between the fixed part and the movable part. A method of manufacturing a skin covered foamed plastic article using this mold is also disclosed.

Abstract: A method and apparatus for constructing an above ground concrete encased storage tank. The apparatus has a support assembly that extends from the baseplate of a concrete form, that supports, elevates, and secures an inner storage tank from the form baseplate, so that the tank may be completely surrounded by concrete. The form has removable walls that may be pivotally attached to the baseplate and initially in a horizontal position. The support assembly has anchor bolts that extend through holes in the baseplate. The anchor bolts are screwed into anchor nuts that are attached to a pair of brackets. The anchor nuts and brackets are spaced from the baseplate by sleeves that fit over the threaded portions of the anchor bolts. The brackets are constructed to support the storage tank, which is placed in the form on top of the support assembly. The tank is then fastened to the support assembly.

Abstract: One or multiple piece golf balls are manufactured by a hot gate injection molding process in which a polymer is injected into a precise cavity defined by mating mold halves. Each individual set of mold halves is selfalignable by means of engageable inclined surfaces on the respective mold halves, which urge the halves into alignment around an axis through the poles, with one of the halves being movable around the axis to enable precise alignment around the parting line. The polymer is injected at a location spaced from the parting line to prevent the formation of a seam or irregular surface at the parting line equator of the ball.

Abstract: A tool for manufacturing the two tone plastic shell includes an electroformed mold (28) having a first surface (29) for forming a front of a shell; a second surface (32) for forming the side edge portion of a shell; and a third surface segment (34) for forming a return flange on a door shell and the third surface segment has a cut-out opening (36) therein and a runout surface (40) providing for entry and removal of a seal and divider wall assembly to seal against a sealing rib (38) in the mold which separates the first, second and third segments into first and second casting surfaces. The divider rib and runout surface are sprayed with thermoplastic material to form a joint between material cast on the first and second casting surfaces and a skin return flap for sealing the cut-out opening.

Abstract: Apparatus for producing shrimp-shaped food products and a food product produced by the apparatus. The apparatus includes a split mold having a cavity shaped as a shelled-shrimp-shaped product. The mold has an injection opening for injecting a minced fish material into the cavity, the injection opening extending from the root or base of the shrimp's head to the shrimp's back portion and being oriented upwardly. After injecting the minced fish meat into the cavity, a V-shaped device is lowered towards the opening of the mold to make a longitudinal groove in the minced fish material. The mold and the material are heated up to produce a shrimp-shaped food product. The apparatus may further include a cover mold having a supply channel formed in it for moving the material to the injection opening. The V-shaped device may be incorporated in the cover mold.

Abstract: A multipart mold having a resilient retainer engageable with a pin attached to a mold part to hold the mold part in a desired position relative other mold parts.

Abstract: A ski comprising a ski body component (1) and a trough (2). The ski body component is a prefabricated component which is formed from a core (3), steel edges (6 and 6', respectively), a running surface coating (7) and possible intermediate layers. To produce the ski, the prefabricated ski body component (1) is introduced into a trough-shaped mould (9), a space being left free for the production of the trough, whereupon the free space is filled with plastics material, preferably by a RTM method.

Abstract: The invention relates to a negative mold containing a plurality of mold portions which can be detached from each other. It functions in particular for the manufacture of shapes consisting of plastic. The two mold halves enclose a molding chamber receiving the material to be shaped. In the chamber is arranged at least one insert abutting at least one projection which together form the negative for a surface depression to be produced in the shape. On the insert a fastening shank is arranged with the transition region being located in the region of the associated mold portion surface and being formed as gradation. Thereby the insert in contact with the mold half covers completely the orifice of the opening containing the shank and, in addition, projects beyond the opening edge.

Abstract: Apparatus for manufacturing thin-walled hollow shells for parts such as automobile door panels, control and instrument panels and the like includes a charge box or powder box for supplying dry thermoplastic material to separate casting surfaces on a heated mold selectively connected to the charge box during a casting process. A selectively pressurizable inflatable seal gasket is connected to the charge box for sealing a division surface on the heated mold which surface separates the casting surfaces of the mold. The inflatable seal gasket includes a base portion fixed to the charge box; an inflatable core with expandable walls to bridge the distance between the charge box and the division surface and a seal bead that sealingly engages the division surface when the seal gasket is inflated to keep the division surface clean for a subsequent application of material to form a connector bond between previously cast two tone colored segments.

Abstract: In a press for making sanitary articles, in particular toilet bowls, by pressure casting, mounting plates bearing the mold parts for forming the mold are suspended on slides along portals which extend radially outward from the center of the press. In the closed position of the press, suspension frames bearing the receiving plates are mechanically locked.

Abstract: An ice mold apparatus is set forth wherein a plurality of separable halves including a plurality of securement straps with ends secured to the lower mold half formed with resilient sections to enable expansion of the mold and prevent damage thereto during ice expansion. An overlying funnel is provided with a flange positioned within a housing on the top surface of the upper mold including a self-sealing iris diaphragm wherein the funnel may be directed through the diaphragm to enable complete filling of the mold. The mold interfacing edges are provided with a continuous seal formed within a semi-circular channel in the lower mold and further provided with a series of alignment pins registrable with openings in the upper mold for precise alignment and sealing of the mold halves.

Abstract: A mold for molding and vulcanizing a rubber tire comprises a rigid core defining an interior surface of the tire, two side parts and a peripheral ring divided into a plurality of segments. In order to be able to close the mold, all the members are designed to slide on each other during final phase of their closing movement.

Abstract: A mould set for injection moulding of plastics material comprises two one-piece components which together define the mould cavity and which are each produced by extrusion of high duty aluminum alloy so as to comprise, also, and integrally with each of them, all the necessary fixtures and fittings for the mould set. In addition, one of the mould components is provided with integrally extruded flanges enabling an ejector plate (also extruded from high duty aluminum alloy) to be supported without the need for complex fixtures. There is thus provided a mould set which performs the same functions as a conventional set even though the latter has three times as many components.

Abstract: A three part mould for an engine cylinder block which has several aligned cylinders with parallel axes, several bearings for mounting a crankshaft having an axis perpendicular to the cylinder axes, voids formed around the cylinders, and recesses between the bearings and the cylinders, includes an upper segment, a lower segment and a central segment. The three segments are superposed in the direction of the cylinder axes. The upper segment forms the cylinders and at least one portion of the voids. The lower segment forms the bearings and at least one part of the recesses. The central segment forms matching parts of the voids and the recesses.

Abstract: A method for designing a molding apparatus, especially for molding lenses and the like, comprises defining a nominal mold reference curve disposed bewteen a pair of mold members having smooth, curved surfaces in confronting relationship to define a mold cavity therebetween. A plurality of concave and convex molding members are provided, all having differing molding surface curvatures but identical spacing from the respective curved surface to the nominal reference curve, measured from the point of closest approach of the curved surface to the reference curve. Any paired concave and convex molding surfaces have the same spacing from the reference curve and thus from each other, so that, for example, a universal gasket can be employed to hold any two paired convex and concave molding members in precise spacing, without regard to the curvature of the molding surfaces.

Abstract: A mold and method is disclosed for the production of a lens that can be placed in or on the eye. The mold employs an inflexible ridge, preferably having a triangular cross section, on one of the mold parts. The ridge contacts the other mold part along an annular line.

Abstract: A method of manufacturing a cosmetic puff for liquid foundation includes forming a latex film coating on one side of a crimp pattern plate by applying a latex film compound thereon. The latex film coated plates are set in a manufacturing framework. The foamed latex foam compound is injected into the manufacturing framework while adding a coagulant and an activator therein to hereby produce a gelled latex foam covered with latex films on both sides. The latex foam and the latex films are simultaneously vulcanized to thereby bond the latex films onto the latex foam. A manufacturing framework for a cosmetic puff is also disclosed.

Abstract: A mold for injection molding a plastic product having a thin-walled area includes a first mold part and a second mold part defining a mold cavity therebetween, encompassed by a parting line, for forming the plastic product, and further defining a gate for admitting injected molten plastic into the cavity. The mold parts define a thin cavity region for defining the thin-walled area of the plastic product; and first and second flow channels which are portions of the mold cavity that are thicker than the thin cavity region, for directing the injected molten plastic from the gate into the thin cavity region, whereby the molten plastic directed from the first flow channel joins with the molten plastic directed from the second flow channel.

Abstract: Apparatus for molding hollow metalwood golf club heads of wax or other material with variations in the lie angle of the neck or hosel relative to the body of the club head, in which two molds with communicating mold cavities are supported for turning of one mold about a pivotal axis to change the angular relationship of the two cavities. The molds have arcuate abutting surfaces coaxial with the pivot for effective meeting relationships in the different positions, the hosel base being slightly oversize to accommodate the displacement, and two core pieces in the molds have part-spherical abutting surfaces, also coaxial with the pivot for effective "kissing off" of the parts. The movable mold is detented in one of eight different positions, in one-degree increments. Another embodiment produces solid-headed irons with selected different lie angles of the hosel, but with only one core piece, which is in the hosel mold.

Abstract: The present invention concerns the manufacture of a support arm equipped with a diamond pickup of the type utilized for a record turntable pickup. The diamond pickup has a cylindrical central body having a plurality of planar facets and an elliptical tapered point.The support arm is injection molded in a mold consisting of an upper and lower die. The upper mold die has a V-shaped notch in which the planar facets of the cylindrical central body is automatically positioned under the thrust of the injected composite material.

Abstract: The invention relates to a process for relaxing lateral stresses at the end of shaping by compacting of a block constituted by an aggregate and a binder (such as a carbon-containing paste), to which is applied a main monoaxial stress in a rigid mold having a bottom and four side walls. According to the process, at the end of compacting and along the compacting axis, there is maintained a residual stress of between 50 and 2000 kilopascals, and preferably between 100 and 500 kilopascals. At least two of the side walls of the mold are then moved apart by a few millimeters, followed by the elimination of the main stress and the extraction of the molded block. The residual stress is maintained for a period of between 1 and 20 seconds following the moving apart of the walls.

Abstract: A rotary block having a gate is rotatably mounted within either one of stationary or movable die plates so that the gate forms a resin passage interconnected to a molding cavity in the stationary die plate in the mold closing state. A gate slug which is inevitably formed on a molded article in injection molding can effectively be cut off by rotating the rotary block so as to intercept the resin passage before a mold opening process.

Abstract: The present invention concerns an apparatus and method for thermoforming a plastic article from a sheet of plastic material heated to a predetermined forming temperature. The apparatus includes a mold having forming surfaces defining a forming cavity generally conforming to the shape of the plastic article to be formed. The heated plastic sheet is urged into contact with the forming surfaces of the mold to form the plastic article. The mold includes at least one undercut forming element moveable between an advanced position wherein the element projects into the forming cavity to form an undercut portion in the plastic article and a retracted position wherein the element is withdrawn from the forming cavity to enable the formed plastic article to be removed from the forming cavity. After the plastic article has been formed, the undercut forming element is moved to the retracted position and a stripper plate is utilized to remove the formed plastic article from the forming cavity.

Abstract: A mold to manufacture an improved press-on bottle cap is disclosed. The cap has a top disk and a thin-walled outer skirt dependent therefrom with an annular tear score line on its inside wall and a laterally projecting tear tab which permit the cap to divide into a lower portion an upper reclosure cap. An annular lip is provided about the outside wall of the cap, approximately in the middle of the reclosure cap. The lip is discontinuous with an open sector above the tear tab. The mold has its parting line in the plane of the annular lip and the lower half of the mold has a lateral cavity to form the tear tab. In this manner, a laterally offset tear tab is provided without splitting the mold cavity along an axial plane.

Abstract: There is provided a mold fabricated from thermoplastic material incorporatinog a thin flexible, substantially knife-edged rim projecting from the periphery of the mold cavity on both the male and female portions thereof, and having a reservoir to contain additional monomer, such reservoir being separated from the mold cavity by the conjunction or mating line of the peripheral rim projections.Such molds are useful for the molding of optical implants which do not require further machining or similar treatment.

Abstract: An injection molding apparatus for making a molding of fiber-reinforced synthetic resin which comprises a mold assembly having a molding cavity defined therein, into which a liquid molding material of synthetic resin containing reinforcing fibers is injected. The mold assembly has a gate defined therein, which gate has a thickness within the range of 0.2 to 0.4 times the thickness of a portion of the molding adjacent the gate, and also has a gate land of a length within the range of 10 to 20 times the thickness of the gate.

Abstract: An optic for an intraocular lens with finished, molded radii on the anterior and posterior edges of the peripheral surface of the optic. The optic has a thin central optical zone and a surrounding annular ring having sufficient material to support haptics. The ring is thicker than the optical zone and, thus, recesses the posterior surface of the optical zone to provide a capsulotomy space. The present novel optic is produced by novel molding pins which are shaped to provide the finished molded radii on the edges of the optic so that the optic requires little or no post-molding finishing or polishing other than the degating and deflashing.

Abstract: A mold for the formation of plastic Luer nuts having a polygonal internal cross-section. The mold includes both movable and fixed cavity sections, so that a non-round threaded core can be unscrewed from within the Luer nut.

Abstract: For eliminating burrs which form on moulded, or injected products, a moulding device and, in particular, a tire-vulcanizing mould, is provided with a plastically and elastically deformable portion on the coupling surface between the corresponding elements. The coupling, between the facing surfaces, is not simultaneous, but involves a portion of surface having an amplitude that increases in its size, during the shutting movement of the mould.

Abstract: A cam shaft made from lobes having irregularly shaped apertures spaced along the longitudinal axis of a hollow tubular shaft. The method of making the cam shaft includes the steps of: inserting a hollow tubular shaft through the apertures of a plurality of the lobes axially and radially with respect to the longitudinal axis of the shaft. The method is characterized by flaring at least a first end of the shaft and backing the exterior of the first flared end to prevent axial radial movement thereof. In addition, a plug means is inserted into fluid sealing engagement with the interior of the first flared end to sandwich the flared end against the backing of the exterior thereof. The hollow shaft is filled with liquid and the opposite ends of the shaft are clamped between the plug means at the first flared end and a fluid sealing means at the opposite end of the hollow shaft. Hydraulic force is then applied to the interior of the shaft to expand the hollow shaft into engagement with the apertures of the lobes.