Abstract: A molding apparatus including at least two mold parts movable relative to each other between an open position and a closed position, the mold parts defining, when in the closed position, a mold cavity having the shape of an object to be molded, and an expandable and contractible core member for molding the object with a zero-draft opening.

Abstract: An apparatus is provided for moulding a polymeric foam into a bun in a longitudinally-extending, channel shaped mould by a mobile vessel and fall plate which are progressively transported from one end to the other of the mould to lay down partially-expanded foam over the bottom of the mould. The apparatus includes a mould for receiving a polymeric foam and including a longitudinally-extending, channel-shaped enclosed mould through which a mobile vessel and fall plate are progressively transported from one end to the other of the mould to lay down partially-expanded foam over the bottom of the mould while the mould is in a moulding position. Gas is vented from the interior of the mould and the mould is moved from the moulding position to a curing position remote from the moulding position where the bun cures in the mould.

Abstract: A hose connection element integrally cast as part of a cast structure such as a water outlet conduit for a vehicle engine comprises a tubular structure including a circumferential hose retaining bead with a flawless sealing surface between the bead and a proximal end thereof. A set of three vented tooling elements is used in creating a polystyrene pattern of the cast structure including integral hose connection element including first and second tooling elements to create first and second half-sections of a for a body portion pattern. The first and second tooling elements include a recess at one end thereof to form a socket depression in the body portion. The third tooling element comprises a cylindrical cavity including an outer wall and an inner wall, with the outer wall being uninterrupted by vent openings and including a circumferential area of protruberance near one end thereof, the parting line for the third tooling element being positioned along a crest of the protuberance.

Abstract: A rigid rectangular cheese mold includes a bottom and four upright walls heatsealed to each other at their edges. The walls are provided with outwardly diverging drainage slits during injection molding of the walls. The drainage slits form rows extending in the longitudinal direction of the walls, the drainage slits of one row are staggered with respect to the slits of the other row. The outer side of the cheese mold may be reinforced by reinforcing strips or a reinforcing strip-like frame. The inner surface of the wall has whey discharge recesses formed in a net structure comprising first structure ribs and second structure ribs. The first ribs extending in the vertical direction of the wall are thicker than the second ribs extending in the horizontal direction. Additional channels on the inner side of wall may connect the whey discharge recesses. The net structure is also formed during injection moulding of the walls.

Abstract: A mold for forming a molded body from a slurry including an impermeable mold part having a cavity for retaining the slurry and a permeable mold provided on a side of a molding surface with a membrane filter. A method of forming a molded body from a slurry includes steps of introducing the slurry into a cavity of a mold including an impermeable mold part and a permeable mold part provided on a side of a molding surface with a membrane filter, and removing a solvent medium of the slurry through the permeable mold part. A pressure casting molding method of forming a high dense ceramic molded body by pouring a ceramic slurry into a mold through a pouring portion thereof and pressurizing the ceramic slurry on a side of the pouring portion while removing a solvent medium of the slurry on the other side of the mold through a permeable mold part of the mold.

Abstract: A shaped article such as a sanitary pottery product is formed through a pressure slip casting process. A mold having a molding cavity defined therein and a slip inlet/outlet hole communicating with the molding cavity is positioned on the support surface of a mold table while the mold table is being maintained horizontally. Then, the mold table is tilted through a first angle with respect to a horizontal plane so that an inner end of the slip inlet/outlet hole is positioned near a lowermost end of the molding cavity in the mold. Thereafter, a slip is introduced under pressure into the molding cavity through the slip inlet/outlet hole. After the clay of the introduced slip is deposited to a desired thickness, the excess slip is discharged from the molding cavity through the slip inlet/outlet hole.

Abstract: A casting mold for sanitary earthenware which has vertically dividable mold units having abutting surfaces with a porous portion of the same quality as a filter medium layer in the mold units and at a region between the porous portion and the exterior of the mold is disposed a sealing member, thereby preventing air leakage and slurry leakage from each mold unit.

Abstract: A concrete form with provision for draining excess water and air from wet concrete by placing fabric over a grid on the support portion of the form. A patterned surface of increased hardness results from use of the form. One embodiment results in concrete with a completely smooth surface.

Abstract: Concrete forms utilizing a concrete form liner including a two-sided fabric having a different range of pore sizes on one side compared to the opposite side. In one embodiment, a microporous coating, such as an ethylene-vinyl chloride microfoam dispersion, is placed on one side of a porous fabric to controllably reduce the pore size of the fabric on that side to between 0.2 to 20 microns. The coated fabric is used in combination with a support and a grid to form a concrete casting system wherein the coated side of the fabric is placed directly in contact with the concrete. The microporous coating stabilizes the surface fibers of the fabric thereby reducing the tendency of the fibers to stick to the concrete. The pore size of the coated side of the fabric must be small enough to substantially keep all concrete particles from passing through the fabric, but sufficiently open to permit the passage of water and air.

Abstract: A mold including a cavity the inner surface of which is at least partly coated with a layer selected from a diamond-like film and layers of fluorine and fluorine compounds. The mold is manufactured by a method which comprises placing at least a part of the mold which constitutes the surface portion of the mold cavity in a vacuum film-forming chamber, introducing a hydrocarbon gas into the chamber, ionizing the gas, and then evaporating it onto a desired surface portion of the mold, thus forming a diamond-like film over the mold portion. The mold portion is surface-treated by ionizing a low-molecular-weight fluorine compound into a plasma, forming a fluorine polymer film from the plasma on at least a part of the cavity surface, while applying a bias voltage to the plasma.

Abstract: A CM block machine for casting masonry blocks includes a mold cavity formed between a mold box and a mold core containing one or more plungers selectively extending laterally into the cavity along a second axis which is normal to the axis of casting so as to form openings extending through portions of the block in the direction of the second axis. The plunger(s) is disposed in a cartridge housing contained within the mold core. An oversized vibrating ring wiper mounted in the cartridge housing engages the external periphery of the plunger to prevent CM material from entering the cartridge during plunger retraction. The plunger includes an annular relief chamber formed in a side wall thereof to provide an additional volume of air from within the cartridge to an air passage communicating with the plunger end face to prevent vacuum from impeding plunger retraction.

Abstract: A pressure casting mold used to mold sanitary earthenware, including a porous layer composed mainly of resin material, a filler, a curing agent and water, the filler being formed of fibers and particulates of glass material, an average diameter of the fiber filler being 1 through 10 .mu.m, and an average length of the fibers being 20 through 100 .mu.m, and the diameter of the particulate filler being 10 through 50 .mu.m, thereby obtaining a porous layer which in use is hard to clog and is high in durability.

Abstract: A mold for skin covered foamed plastic molding which utilizes a middle mold to be placed between an upper mold and a lower mold, capable of avoiding an excessive amount of pressure to be exerted on the upper portion of the lower mold so that the durability of the lower mold can be improved, and preventing gaseous leakage so that the penetration of the liquid foam resin to be poured on a skin cover becomes controllable. The mold includes an upper mold to be closed over the lower mold, having extended side portions which can reach the base of the lower mold when assembled such that the extended side portions can support the upper mold by themselves.

Abstract: This invention relates to a mold for making a formed chair arm with passages therein.

Abstract: A split tire mold having a tread ring in which provision is made for venting air circumferentially across the inner surface of the tread ring so that the air escapes from the parting line of the mold halves, dispenses with widely used, conventional, radially protruding vent stubs. The air is vented through "butterfly-shaped" or "double-wedge-shaped" arch-vents which provide passage for trapped air above each tread block of the tread as it is moved against the inner surface of the tread ring. The shape of the arch-vent passages and the angulation of the wedges is critical to the effectiveness of the arch-vent which forms an arch-vent bridge of cured rubber in a cured tire. The configuration of the bridge allows as cured tire to be easily removed from the mold cavity without leaving a broken-off piece of the rubber bridge to plug the arch-vents. This arch-vent design leaves unobtrusive flat-sided, narrow wedge-shaped pieces of rubber as the arch-vent stubs, tapered in two directions.

Abstract: An improved mold for forming foam products is provided with replaceable mold inserts which can be inserted into a mold block. The mold inserts have a cavity in which the product is foamed. The mold inserts are formed from a stick resistant material. Cap members having vent channels provided therein are adapted to fit into the mold insert. The number and size of vent channels is determined by the desired size and density of the molded foam product.

Abstract: A mold, used in pressure casting ceramic articles, includes a plurality of mold parts set and clamped in combination. Each of the mold parts includes: a porous body forming a filter layer with a generally even thickness and a plurality of channels formed in the inside or outside surface thereof and most running in parallel with the molding surface of the mold for allowing water and air to flow therethrough; a reinforcing iron frame for fitting the porous body therein; and a filler filling up the space between the porous body and the iron frame.

Abstract: A rigid rectangular cheese mould (1) comprising a bottom (2) and four upright walls (3) heatsealed to each other in their corners. The walls (3) are provided with outwardly diverging drainage slits (4) during injection moulding of the walls.The drainage slits (4) form rows (19) extending in the longitudinal direction of the walls, the drainage slits of one row are staggered with respect to the slits (4) of the other row.The outer side of the cheese mould (1) may be reinforced by reinforcing strips (8) or a reinforcing striplike frame.The inner surface of the wall (3) is provided with whey discharge recessions (5) forming a net structure resembling a cheese net structure comprising first structure ribs (16) and second structure ribs (17). The first ribs (16) extending in the vertical direction of the wall (3) are higher than the second ribs (17) extending in horizontal direction. The height at the intersection point is the height of the first ribs.

Abstract: A mold for curing a green tire which is made of an elastomeric material capable of flowing prior to curing. The mold includes a surface defining a cavity in the mold for receiving the green tire. A passage communicates the cavity with the exterior of the mold. A vent plug is located in the passage. The vent plug has an opening extending therethrough communicating the cavity with the passage. Elastomeric material may flow into the opening to form a projection extending from the tire as the green tire is pressed against the surface defining the cavity during a molding operation. The vent plug has a portion extending into the cavity a predetermined distance from the surface to form a recess in the tire adjacent the projection. The recess provides a space that the projection may deflect into to prevent shearing off of the projection during removal of the tire from the mold.

Abstract: A divisible slip-casting mold has filter layers which incorporate a combination of different types of fluid-flow conduits to achieve improved fluid-flow properties. The conduits include major portions of porous ropes arranged in curved lines and minor portions of blind holes installed in straight lines. The porous ropes are essentially installed in those portions of the filter layer where the ropes are readily or uniformly arranged, and the blind holes are essentially installed in those portions of the filter layer which exhibit poor fluid-flow properties and in which installation of porous ropes is difficult. Thus, substantially uniform fluid-flow properties are provided in the filter layers of the mold to enhance mold casting performance.

Abstract: An assembly for the preparation of ceramic composite structures includes a segmented container within which a permeable filler is retained and a parent metal body is contacted with the bed of permeable filler. The segmented container is comprised of one or more segments made of a material, such as an inconnel alloy, which has a coefficient of thermal expansion which is significantly greater than that of the filler. The segments are arranged to defined between or among them one or more expansion joints which are effective to accommodate circumferential thermal expansion of the segments to thereby inhibit or prevent volumetric expansion of the container. A method of forming ceramic composite structures includes heating the resulting assembly in the presence of an oxidant to melt and oxidize the parent metal, e.g., aluminum, to form a polycrystalline material comprising an oxidation reaction product which grows through the mass of filler to embed it and thus form the composite structure.

Abstract: Molding a foamed product is carried out by using a front and a rear mold for molding a front and a rear portion of the foamed product and a core interposed between the front and rear molds. The front and rear molds are closed at a moment when a lapse of time arrives at 30%-100% of a rise time of the foaming stock solution later applied. Thereafter the closed molds are maintained in a position where an angle of the closed molds relative to a horizontal plane is within a range between 90.degree. and an angle more than 0.degree.. The front and rear molds are pivotally connected to each other with their one ends by means of a pivot shaft. The core is pivotally supported with its one end by a shaft arranged in parallel to the pivot shaft. The core is formed with a through-hole and said rear mold is provided with a protrusion to be hermetically fitted in the through-hole of the core.

Abstract: A method and apparatus for combining soap segments, including providing a soap mold member formed with complementarily configured shells defining an internal cavity therewithin securable to an elongate handle to secure soap segments therewithin. The shells include apertures directed therethrough, whereupon positioning a plurality of soap segments within the cavity, the mold is positioned within a container. The container includes a sponge core defining a central cavity defined by a diameter substantially equal to that defined by the shells when secured together. The sponge core is saturated with water prior to insertion of the mold therewithin to permit continuous moistening of the segments contained within the mold when positioned within the cavity. The soap from the mold may be further directed within a press, wherein the press includes an upper and lower lid, wherein the soap portions are positioned within the press upon lifting of the upper lid and resecurement thereof relative to the container.

Abstract: A divisible slip-casting mold has filter layers which incorporate a combination of different types of fluid-flow conduits to improve the mechanical strength of the mold while providing the filter layers with substantially uniform fluid-flow properties. The conduits include major portions of blind holes installed in straight lines and minor portions of porous ropes arranged in curved lines. The porous ropes are essentially installed in those portions of the filter layer having a mechanical strength which is inferior to the predominant portions of the filter layer, and the blind holes are essentially installed in the predominant portions of the filter layer. Thus, improved mechanical strength and substantially uniform fluid-flow properties are provided substantially throughout the filter layers of the mold.

Abstract: A water filling assembly for ice trays including a reservoir disposed in water delivering relation to each of a plurality of vertically stacked ice trays within a housing wherein the reservoir and trays are cooperatively structured to successively fill each of said trays from an uppermost one in the stacked array to a lower most one upon the selective passage of liquid from said reservoir to said trays.

Abstract: An apparatus for manufacturing an otoplastic. An otoplastic is manufactured directly in the ear of a hearing-impaired person in that a deformable envelope is pulled over a die or over a shell or over an overlayed over-shell. This apparatus is then supplied with flowing otoplastic material between the die and the envelope, being supplied therewith in the ear. The envelope expands and assumes the shape of the auditory canal. After hardening or curing of the otoplastic material in the ear of the hearing-impaired person, the envelope and the die are removed and a module of either an in-the-ear or of a behind-the-ear hearing aid is integrated therewith.

Abstract: A mold for injection molding including a cylindrical outer mold and a columnar inner mold. The inner mold is provided, on its external circumferential surface, with a large number of tooth-shaped grooves extending in the axial direction thereof, and it is placed inside the outer mold to define an annular cavity between the external circumferential surface of the inner mold and the internal circumferential surface of the outer mold. The outer mold is provided with a plurality of runners extending axially near the internal circumferential surface. The runners are arranged at regular annular intervals along the circumference of the outer mold. Furthermore, slit-shaped gates are formed along the full length of the runners, the gates opening into the internal circumferential surface of the outer mold, in such a way that the inflow of molten molding material flowing from each runner into the cavity is gradually reduced along the runner from the upstream side towards the downstream end.

Abstract: A flat-bottomed quartz glass crucible for the manufacture of monocrystalline silicon is made by disposing granular quartz particles on a flat base in a cylindrical mold. A vacuum is drawn on the particles through vacuum holes in the base to retain the particles on the base while the base and mold are rotated, and while the particles are heated to fuse them into a quartz glass crucible shape.

Abstract: An apparatus for pressure molding ceramic articles includes at least one split mold including a core mold and an outer mold which are joined together for defining a pressure mold cavity therebetween. At least the bottom surface of the pressure mold cavity is inclined longitudinally and laterally, while the split mold per se is not inclined and the slip supply passage for supplying the slip into the pressure mold cavity communicates with the lowermost end of the pressure mold cavity. Due to the above construction, it is no longer necessary to incline the entirety of the split molds so that the frame structure of the apparatus can be vertically constructed on a horizontal floor which permits easy construction installation and adjustment and maintenance of the apparatus. Furthermore, since the bottom surface of the pressure mold cavity is inclined longitudinally and laterally, the surplus slip is discharged completely and smoothly, and does not remain in the pressure mold cavity.

Abstract: Vents for molds can be improved if, in place of a single relatively large vent opening, there is used a vent which has a plurality of relatively smaller vent openings in which the cumulative cross-sectional area of the relatively smaller vent openings are approximately the same as that of the relatively larger vent opening it replaces. It was also found that the vents have a more efficient self-cleaning capability if the ratio of the depth of each vent opening to the cross-sectional diameter of the vent opening is about 1 or less.

Abstract: An apparatus for forming a fiber reinforced slab gel for use in electrophoresis including a box shaped casing having a first groove at the center of an inner lower end surface, and a cover having a second groove for hermetically closing an open area of the casing. A plurality of slab gel forming plates are laminated in the casing with fiber reinforced cores interposed between adjacent slab gel forming plates. An aqueous solution of an organic monomer is poured into the casing through a pouring pipe in the cover and the monomer is polymerized to form the gel slabs. Air in the casing is vented to the outside when the monomer is introduced into the casing.

Abstract: A sintering device includes separable mould walls which together define a mould cavity and a mould core which is positioned within the cavity to define an undercut mould surface. The core includes a hollow frusto-pyramidal central support formed with guideways and a plurality of core segments mounted for slidable movement within the guideways whereby the core is radially expandable and contractable. The segments include a plurality of arc-surface segments alternating with trapezoidal segments. The mould walls and the core include passages for introducing steam and air into the cavity. The passages of the core place the hollow interior of the central support in communication with the mould cavity.

Abstract: A method of making a porous mold for pressure slip casting. A surface porous layer is cast which has an average pore diameter of at most 20 microns and a thickness of 5 to 40 mm. An adhesive is applied in a pattern to the rear surface of the surface porous layer to leave an unapplied portion on the rear surface. A coarse porous layer is applied to the adhesive applied and unapplied portions of the rear surface of the surface porous layer which is made of a mixture of liquid resin and a filler of a particle diameter of 0.1 to 5.0 mm at a volume ratio of 15 to 50:100. The coarse porous layer has a thickness of 5 to 30 mm. A sealing adhesive is applied to the surface of the coarse porous layer and means is applied for passage of water from and air into the coarse porous layer.

Abstract: A split tire mold having a tread ring having arch-vents for venting air circumferentially across the inner surface of the tread ring so that air escapes from the parting line of the mold halves. The "dougle-wedge-shaped" arch-vents provide passage for trapped air above each tread block of the tread as it is moved against the inner surface of the tread ring. The shape of the arch-vent passages and the angulation of the wedges is critical to the effectiveness of the arch-vent which forms an arch-vent bridge of cured rubber in a cured tire. The configuration of the bridge allows a cured tire to be easily removed from the mold cavity without leaving a broken-off piece of the rubber bridge to plug the arch-vents. This arch-vent design leaves flat-sided, narrow wedge-shaped pieces of rubber as the arch-vent stubs, tapered in two directions. The arch-vent stubs, viewed in the radial direction are so unobtrusive as to be cosmetically acceptable in a finished tire.

Abstract: The mold described has walls disposed about the mold plates and vent pin retainer plates to permit a vacuum to be generated. The vent pins have been designed to be self cleaning. A pin having a generally cylindrical shape is used. A first portion of the pin has a face defined by a chord of the cylinder. The face leaves a small space between the pin and the opening wall which permits the atmosphere to be removed from the cavity. Below the first portion is a second portion, smaller in diameter than the first portion. Below the second portion is a third portion of essentially the same design as the first portion rotated 45.degree.. This portion cleans the walls of the opening when the pin is raised to eject the parts.

Abstract: A porous mold for pressure slip casting, which includes: a surface porous layer having an average pore diameter of at most 20 microns and a thickness of 5 to 40 mm; an adhesive applied in a pattern to the rear surface of the surface porous layer to leave an unapplied portion on the rear surface; a coarse porous layer covering the adhesive applied and unapplied portions of the rear surface of the surface porous layer and made of a mixture of a liquid resin and a filler of a particle diameter of 0.1 to 5.0 mm at a volume ratio of 15 to 50:100, the coarse porous layer having a thickness of 5 to 30 mm; a sealing adhesive covering substantially the outer surface of the coarse porous layer; and a passage for water from and air into the coarse porous layer.

Abstract: A porous die includes a porous die body with a plurality of pores formed therein; a cooling chamber provided in direct contact with the back side of the porous die body in order to cool the porous die body; a device for supplying a coolant to the cooling chamber; and suction holes through which the cooling chamber is evacuated and the air and the coolant entering the cooling chamber are simultaneously sucked.

Abstract: A mold (1) for cast-molding a slip is provided, which comprises a divsible casting mold including a plurality of mold portions to form a mold cavity (4) when mated together; each mold portion including an air-tight housing (2), an intermediate layer (5) of coarsely porous structure adjacent to the air-tight housing (2), and a solid synthetic resin filter layer (3) of fine open-cell structure; a slip supply duct (8) being connected with said mold cavity (4) and communicated with the outside of the air-tight housing (2); a fluid-flowing duct (9) being connected with said coarse intermediate layer (5) and communicated with the outside of the air-tight housing (2); said filter layer (3) being permeably joined to the coarse intermediate layer (5), and having substantially precise shape and dimension of substantially uniform fine open-cell structure.

Abstract: A shuttering used for forming concrete comprises a plate with a plurality of through holes opening on both its face and reverse, and a double woven fabric consisting of a face tissue which permits passage of water but prevents concrete from passing and a reverse tissue opposed to the face of the plate and relatively displaceable with respect to the face of the plate; the surplus water oozing out of placed concrete flows through gaps formed by the reverse tissue between said plate and the face tissue as well as the through holes of said plate.

Abstract: Herein disclosed is a method of making a porous mold by using an upper case which bears lines for forming channels for water and air communications.

Abstract: A method of making a porous mold used in pressure casting for forming ceramic articles, which includes the steps of: removably attaching a plurality of apertured holding members in an array at a desired interval to the inner face of an upper case made of a rigid material; threading a flexible line into the apertures of the holding members in each row to hold it at a predetermined spacing from the inner face of the upper case, at least one of the two ends of the flexible line being extended to the outside of the upper case; casting slurry into a mold cavity which is defined between the upper case and a lower basic case joined to the former case to form a porous mold; removing the upper case from the porous mold after the slurry has cured, while leaving the holding members together with the flexible lines in the porous mold; and extracting the flexible lines from the porous mold to form channels in the porous mold.

Abstract: A method of making a mold used in a pressure slip casting process, including the steps of: preparing at least two porous bodies each defining a filter layer having a plurality of channels formed therein for allowing water and air to flow therethrough; placing a reinforcing iron frame and one of the porous bodies on a bottom board with a parting agent applied to its surface; applying a sealing resin to the surface of the other porous body opposite to a molding surface thereof and to a portion of the surface of the bottom board between the box and the porous body; filling up the space between one of the porous bodies and the reinforcing iron frame with a filler; and preparing a second part of the pressure mold.

Abstract: A cheese press for a plurality of rows of cheese moulds is constituted by a plurality of individual cassette shaped pressing units (30) each adapted to receive a row of moulds or mould batteries and each ceilingwise provided with pressing means (68) for pressing the moulds. Each of these units can be made as a lightweight construction e.g. of stainless sheet steel and is preferably made as a heat insulated tube, which is endwise closable so as to be vacuum resistent. Especially the production of Cheddar cheese is highly accelerated when the pressing is effected under vacuum. The cassette units may be arranged in a conveyor system for consecutive cooperation with a loading and unloading station, or they may be arranged more or less stationarily for cooperation with means for transporting the moulds to and from the cassette units.

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: The present invention relates to apparatus form making a vial and cap. A mold for forming the vial and cap and means for seating the cap on the vial prior to ejecting the vial from the mold is provided and includes a frame for the mold, a first mold half arranged on the frame, and a second mold half movably arranged relative to the first mold half so as to form a mold cavity therebetween. The mold produces a vial and cap including smooth radii provided at several locations to facilitate the seating of the cap on the vial.

Abstract: A unitary mold for making ice sculpture includes: a mold made of elastomer material having an inner cavity concave downwardly for forming a model of an ice sculpture such as an animal, a building or a person or an article; a perforating bar or needle poking through the mold which can be warmed up to slightly melt the ice surrounding the bar or needle for its easy withdrawal from the ice product and forming a through hole of the ice sculpture for decorative, carrying, or water-drainage purposes; and an expansion-releasing element such as a flip-flop member formed as a part of the mold, serving as a buffer for the expansion of the water during its refrigeration process.

Abstract: A casting installation for casting slip into ceramic product by use of at least one unique casting mold. The casting mold is formed of a plurality of separate mold parts each having a plurality of channels therein and having its respective outer face treated to be fluid-tight and inner molding surface. The casting installation includes a pressure-resisting container having a surrounding wall formed along the inner surface thereof so as to define an opening through the container, the mold parts, when assembled, being dimensioned to define a molding cavity of the casting mold; the space being in communication with the molding cavity of the mold. The casting installation further includes a clamp for clamping the casting mold firmly; the channels are operatively connected for depressurizing the channels; a source of slip operatively connected to the molding cavity of the casting mold; and a source of fluid operatively connected to the space surrounding the casting mold.

Abstract: A mold assembly for an injection-molding machine for molding a disc, including a stationary die, a movable die movable relative to the stationary die, a stamper which is retained at least at an outer peripheral portion thereof on the movable die and which has information signals recorded thereon, and an outer retainer ring for retaining the stamper on the movable die at the outer peripheral portion. The stationary die, stamper and outer retainer ring cooperate to define a mold cavity, so that the disc is molded of a resin material injected into the cavity, such that the information signals are reproduced on one surface of the molded disc. The mold assembly has an annular void in which an outer peripheral edge of the outer peripheral portion of the stamper is accommodated without contact with the movable die and the outer retainer ring.

Abstract: A rapidly adjustable mold for thermoforming plastic sheet material into different-sized containers is disclosed. The mold comprises a bottom wall and four orthogonally oriented, readily moveable sidewalls, which together define a mold cavity that is rapidly adjustable to produce rectangular containers of various sizes and aspect ratios. The first sidewall extends from a bottom wall corner and alongside a first bottom wall edge; and is vertically moveable but horizontally stationary. The second sidewall extends from the same corner but alongside a second bottom wall edge perpendicular to the first; and is both vertically moveable and horizontally moveable along the second edge. The third sidewall extends perpendicularly from an end of the second sidewall and parallel with the first sidewall over the bottom wall; and is vertically stationary but horizontally moveable in directions parallel with both edges.

Abstract: Concrete forms comprising a first cloth sheet permitting surplus water and air contained in concrete cast in the form to pass therethrough but capable of blocking the passage of the concrete, a second cloth sheet permeably secured to the first sheet, permitting the surplus water and air to pass between and through the first and second sheets and to be absorbed into the second sheet as well as the first sheet, and a support plate to which the second sheet is bonded as by adhesive or thermal bonding acting through only part of the thickness of the second sheet, leaving as water and air permeable throughout the remainder of the second sheet, all of the first sheet, and the interspace therebetween, such being effective as flow paths for surplus water and air to exhaust from the concrete cast in the form to thereby shorten the cure time and improve the strength of the concrete when cured.