Abstract: In an automatic mold part producing apparatus having a mold chamber which is filled with mold forming material that subsequently is compressed between a pair of opposite end walls, the mold forming material is forced into said mold chamber by means of pressurized air, the pressure of which is gradually or stepwise increased during the chamber filling operation, for the purpose of achieving uniform compactness or density of the mold forming material throughout the height of the mold chamber.

Abstract: A first thermoplastic resin for forming the shell of an article is charged into the front portion of an injection cylinder and a second thermoplastic resin for forming the core of the article is charged into the rear portion of the injection cylinder. Both resins are substantially separated, being in contact only a central area of the cross-sectional plane of the injection cylinder. These thermoplastic resins are injected in a mass into a mold cavity with the second resin enveloped by the first resin, and finally solidified in the mold cavity resulting in a molded article having sandwich construction. Various sandwich articles can be obtained easily by means of a single injection molding machine. The process also allows repeated injection operations without exposure of the core material on the surface of the molded article.

Abstract: The hay cubing apparatus comprises a chassis having a substantially horizontally oriented table, the table having sidewalls issuing upwardly and at least a pair of dies mounted adjacent to the table on shafts, a feed cone carries on each of the dies. Each of the dies includes a rim being fastened to the shafts, a plurality of teeth mounted distally and radially about the rim, the dies meshing with each other, and means driving at least one of the shafts. Each feed cone material, handling means comprises an upstanding cone-shaped body, the body being mounted on the uppermost side of the dies; and an auger being a band projecting from the exterior walls of the cone-shaped body, and projecting in a spiral pattern from the apex to the base of the cone-shaped body.

Abstract: Method and apparatus for molding plastic articles by forming a parison on a core within an injection mold, cooling the internal and external walls of the parison thus formed by heat transfer through the core and the injection mold, transferring said core to a delay position for permitting redistribution of heat from the interior of the parison to the exposed walls to obtain a more uniform temperature just above the material's glass transition temperature, and subsequently transferring said core to an expansion mold for expanding same, the cooling and heat redistribution permitting a greater degree of orientation of the polymer chains of the formed articles. Preferably, the apparatus for practicing the process includes injection and expansion molds supported in such a relation as to permit a substantial time interval between injection and expansion of the parison.

Abstract: A concrete product making machine having a product forming mold with a cavity for receiving cementitious material; support surfaces such as pallets on which the formed products are supported; a transfer device by which "green" products or blocks are removed on their pallets from the vicinity of the mold; and a block height gauging device, downstream of the mold, for gauging the height of the products by gauging the distance from the top surfaces of the pallets to the top surfaces of the products.

Abstract: Injection blow molding method and apparatus for a hollow article having openings at both ends, in which said method comprises the steps of: forming a parison having openings at both ends by injecting plastic material into the cavity of an injection mold which is provided with a stationary core member and a movable core member as disposed on the same line, shifting said parison from said injection mold to said blow mold together with said movable core member, closing the remaining open end of said parison by a closing core member, and blowing said parison within said blow mold to produce a molded article having openings at both ends.

Abstract: The invention concerns an improved injection device for molding machines with a cooling chamber for casting of non-ferrous metals and alloys. It is characterized by a two-part piston, one part of which slides freely and coaxially inside the other, forming a chamber in which a gas, neutral with respect to the metal to be cast, is compressed by the forward movement of the piston by virtue of a stop-pin, then liberated and expanded at the end of injection in a container of liquid metal where it causes a balancing force effect and improves the filling of the mold.This device makes it possible to eliminate the "ramroddings" which occur in single-piston machines at the end of injection and to obtain cast products which are free of defects.

Abstract: A machine is provided for producing decorative candles of the type having a main body portion and an insert extending for substantially the entire length of the candle. The machine includes a first conveyor and a second conveyor with a horizontal section of the second conveyor path extending parallel to and spaced vertically above a horizontal section of the first conveyor path. At least one candle insert mold base is carried by the first conveyor and at least one candle insert mold is carried by the second conveyor with the conveyors being so aligned that the insert mold is deposited on the base at the upstream end of a portion of the machine and removed from the base at the downstream end of the machine portion. A first casting station is provided along the machine portion to cast the candle insert. Means are provided along the machine portion for forming a bore extending through the insert with a countersink at one end.

Abstract: Automatic molding apparatus to make flaskless molds from match plate patterns using sand and binder pre-mix and an activator or catalyst includes form boxes having open faces and double wall construction with a continuous chamber between the walls. The inner wall is vented to the chamber to provide a gas flow passage. The apparatus also includes manifolds which clamp over openings in the top and bottom walls for innoculation and pneumatic withdrawal of activating or catalytic-reacting gases such as hot air or carbon dioxide which are innoculated at an innoculation station into the mold box to decrease the hardening time of the sand. The open faces of the mold box are closed by hinge plates or cover plates each rotated by a rack and pinion. The plates are further secured during sand filling by spring-loaded arms bearing against tapered ribs on the hinge plates.

Abstract: This invention relates to blow molding apparatus for making plastic articles. It circulates cooling fluid through core rods for cooling blown articles from the inside, preferably with the blown article on the outside of a balloon that is permanently connected with the core rod. The connection of the balloon to the core rod is constructed so that there is no axial pull on the balloon during stripping of the blown article from the core rod and balloon. The invention provides constructions for admitting air between the balloon and a blown parison to break the vacuum when the balloon is to be collapsed. Fluid is also circulated over the outside of the blown parison to cool it, and this can be done in a perforated shroud that serves as a blowing mold, particularly for flexible wall containers.

Abstract: This invention relates to a die casting machine with a rotating frame carrying several molds. These molds are arranged to advance consecutively by stepwise rotation to a common station where removal of the castings takes place. The machine is especially suited for casting objects of ceramic and similar materials, and for this reason the molds are enclosed in separable, bi-sectional flasks designed to facilitate removal of the castings.

Abstract: A method of forming a composite metal product is provided, wherein the product so formed consists of of a core having at least one layer each of copper and of aluminum and at least one outer cladding layer of stainless steel.

Abstract: A fixture for blocking lenses of various diametral sizes with cast blocks of corresponding diametral sizes using a single annular support of fixed diameter for all lenses as a reference relative to which pressure used in clamping of the lenses for blocking may be regulated to prevent lens distortion despite variations in their diametral sizes.

Abstract: This invention relates to an apparatus for automatically adjusting the center-height of a mold and the like which are used for manufacturing concrete pipes characterized in comprising a supporting device which supports a mold and the like for manufacturing concrete pipes horizontally in the manner that the center of the axis of the mold moves vertically along a perpendicular line and stops it at a determined position, and a detecting device which detects the position of the mold by contacting with the outside of it and controls and stops the movement of the said supporting device when the center of the mold is placed at the determined position.

Abstract: A balanced runner system for injection moulding apparatus is disclosed. The runner system has an inlet, a plurality of runners and five gates. One of the gates is centrally located, the remaining gates being symmetrically spaced about the centrally located gate. The runners are such that the runner system is capable of supplying molten polymer to each gate at substantially the same rate. The runner system may be used to obtain a more uniform flow of molten polymer to a mould.

Abstract: An apparatus for molding articles, particularly those having a body portion formed from a cured material and bonded to a relatively rigid insert portion. Two mold members are arranged for relative movement along a given axis between open and closed positions. Each of the members includes surfaces at least partly directed towards each other to define in said closed position of the members, a molding cavity between the members. One of the mold members has a part for engaging a relatively rigid insert, so as to form a flash barrier on the insert when it is engaged by the mold part. The mold has surfaces for supporting the insert on at least one of its surfaces. The mold assembly includes a third mold member which is movable relative to both of the other two mold members. The moldable material from which the article is to be formed is received on one mold member, and the other member is reciprocable along a given axis and adapted to apply a predetermined closing force to the first and third members.

Abstract: A method and apparatus for the direct casting of steel slabs for subsequent processing instead of casting ingots and then reducing them to slabs, blooms or billets. A flat elongated casting cavity is formed by an assembly of mold components to define a slab. Prior to casting, this mold is inclined at an angle of about 3.degree. to the horizontal with the bottom end of the casting cavity higher than the pouring end. The molten metal is poured through a sprue attached to the mold assembly adjacent the pouring end. The sprue provides a reservoir for molten metal at a level above the bottom end of the casting cavity so that the casting cavity is completely filled during pouring. When pouring is completed, the mold assembly is promptly tilted to an upright position with the pouring end and sprue at the top.

Abstract: The invention relates to a device for raising a sliding shuttering designed to be used for the continuous production of silos, water towers, etc.The device consists of two cases, coaxial with a slide bar, separated from one another by a jack also coaxial of which each of the two parts in respectively integral with one of the cases, each case comprising locking jaws in its interior which, alternating from one case to the other, engage with a slide bar, the locked case serving as a support point for the case in movement and reciprocally, the pressure of the compressed high-pressure fluid of the jack for raising the case joined to the frame, supporting the shuttering, which device is characterised in that the means for raising the other case is provided by a low pressure fluid which acts when the high-pressure fluid is decompressed, which enables an efficient device to be obtained and avoid even a slight backward movement of the shuttering.

Abstract: Injection molding apparatus for discontinuous fabrication of molded bodies consisting of a plurality of layers with a foaming core and an outer skin of non-foaming thermoplastic material, the apparatus consisting of an injection head connected to two extruders and equipped with a centrally-located jet surrounded by a ring jet.

Abstract: Apparatus for injection molding parts which comprises forming mold cavities from a set of molds and injecting molding material into the cavities to mold a part on a pin extending up in each cavity; the molded parts are then ejected by being pushed up and off the pins when the molds are moved to expose the parts; ejection involves the application of a substantially uniform force over the base of the moulded part. The apparatus includes means for automatically degating moulded parts from waste material involving initial movement of one of the molds in the set relative to the others; automatic degating can be employed which can occur internally or externally of the molded parts; the molds employed with these specific ejecting and degating means, or with other ejecting and degating means, comprise an upper and lower portion of a universal mold base which forms an integral part of the molding apparatus and to these portions are detachably secured modular mold sections.