Abstract: A mold assembly for resin sealing for use in the manufacture of a semiconductor device etc., includes a pair of upper and lower molds. Elastic deformation parts adapted to be deformed in the direction of compression of the upper and lower molds with an object to-be-sealed, held therebetween, are provided on at least one of a cavity block of the upper mold and a cavity block of the lower mold. Grooves are provided in the surface of the cavity block formed with the elastic deformation parts.

Abstract: In a method for manufacturing a footwear comprising placing in a mold assembly a preformed section of appropriate material forming part of the footwear in such a manner that a part of said preformed section protrudes into a molding cavity for molding another section of said footwear, injecting molding material into said cavity and thereby integrally connecting said preformed section with the latter section, an improvement comprising surely holding said protruded part of said preformed section in place in said molding cavity by means of a plurality of projections integrally extended from said mold assembly into said molding cavity.

Abstract: In the step of plastic encapsulation of a semiconductive device, the inner ends of a group of leads comprising part of a lead frame, the semiconductive chip and the connections between the chip and the inner ends of the leads, are put into a cavity of a mold and fluid encapsulating material is forced into the cavity to surround the elements that are in the cavity with encapsulating material. A lead frame, which may be supplied in strip form, is provided, a part of which is so formed as to act as a gate for the admission of fluid encapsulating material into the mold cavity.

Abstract: A hollow shaped article is formed from a preformed sheet of foamed thermoplastic material wherein a joint is formed along the length of two abutting edges of the preformed sheet at the sheet's surfaces but inwardly of the surfaces the abutting edges are left unbonded. The process for forming the articles is characterized by flexing the preformed sheet into the desired general shape, placing it into a two-part mold, and then heating it in two heating steps.

Abstract: A concrete pouring form for use in permanently joining at the job site precast reinforced or prestressed posts and beams. The posts and beams are precast and will be used in the erection of the building when they have reached their maximum strength. Only sufficient concrete will be poured at the job site, as needed, to interconnect the posts and beams and perhaps the floors. Forms are used for joining together the adjacent ends of the posts and beams and providing therebetween a cavity into which concrete can be poured. The forms are preferably sectional so as to be separated and removed after the amount of concrete poured at the jobsite has set fully. These forms have clips thereon which can be connected with suitable guy supports for stabilizing the joint during the setting of the poured concrete therein.

Abstract: Open face molding apparatus for molding a pivotable flow control device. The flow control device has a main body portion of rigid plastic material and a sealing portion of elastomeric material on the outer periphery of the main body portion. The pivot rod of the flow control device has a central portion embedded in the rigid main body portion, with offset end portions, one of which has a crank arm formed thereon. The molding apparatus has a mold body with an open mold cavity having first and second portions for respectively forming portions of the main body portion and elastomeric sealing portion of the flow control device.

Abstract: The novel embodiments disclosed herein also illustrate a novel method for making a recuperator structure. First and second pluralities of layers of elongated tubes are provided which are formed of a glass that is thermally crystallizable to a low expansion glass-ceramic. Each of the tubes is filled with a fluid medium that is expansible in response to the application of heat and the tubes have sealed ends to retain the expansible fluid medium entrapped therein. Each of the tubes has an essentially straight central portion and header connector portions continuing from each end of the central tube portions to the sealed end of the tube. The header connector tube portions of the first plurality of layers diverge away from the header connector tube portions of the second plurality of layers at the ends of the central tube portions when the first and second layers are placed on top of each other.

Abstract: The invention is concerned with apparatus for manufacturing gas turbine engine components e.g. guide vanes and blades, in dense silicon nitride starting with silicon nitride in a powder form.Guide vanes are usually in the form of an aerofoil portion and two shroud portions and according to the invention, the aerofoil portion is made in a first mould by hot pressing a mixture of silicon nitride powder and a fluxing agent, such as magnesia. The formed aerofoil is placed in a second mould so that each end extends partly into a space which is to be filled with a further mixture of silicon nitride powder and a fluxing agent. The further mixtures are hot pressed both to form the shroud portions and to amalgamate the shroud portions with the aerofoil portion.Features, such as, flanges and webs can be formed in the shrouds during the moulding process or they can be machined into the shrouds after the vane is removed from the second mould.

Abstract: Molding devices and methods for producing a low cost, multi-element, adjustable focus lens assembly for use in photographic apparatus. The assembly features a two-part molded plastic lens mount comprising forward and rear mounts, each having an uncentered lens element insert molded and centered therein and an integrally molded screw thread for coupling the forward and rear mounts together. The molding devices comprise cavity molds having movably mounted zonal clamps therein for centering the lens element within the cavity and for disengaging the molded mounts from surfaces in the molds that form the screw threads.

Abstract: A molded cable splice is formed by wrapping strip-formed semiconducting and insulative thermosetting molding compounds about a layer of semiconducting tape covering a connector and exposed central conductors of a pair of cable ends joined by the connector, and bonding the insulative molding compound to the cable insulation layer in a heated mold having opposing end clamp portions each with an inner surface of a predetermined radius and length. The radius is selected in accordance with the formula ##EQU1## , WHERE R IS THE RADIUS OF THE CABLES TO BE JOINED AND X is a numerical quantity called the cable clamp factor. For cables having an ethylene propylene rubber insulation layer, X lies in the range from about 0.20 to about 0.50; for cables with a cross-linked polyethylene insulation layer, X is partially dependent on insulation thickness W and lies between a lower range of from about 0.50 to about 0.76 for W = 0.175 inch and an upper range of from about 0.87 to about 1.00 for W = 0.900 inch.

Abstract: A bait molding device for forming and securing moldable bait material such as bread dough about a fishhook. A mold is formed of two cup shaped mold sections which are secured to pliers-like devices for opening and closing of the mold sections. The molds are of an elongate configuration to accommodate an entire fishhook and moldable bait material surrounding the fishhook within the mold sections. One of the mold sections includes a groove through one of the edges of the mold to permit the fishing line attached to the hook to pass through the mold when closed.