Abstract: A crosshead (10) and a method are provided for extruding a tubular layer of a thermoplastic material, or for coextruding tubular layers of various thermoplastic materials, without incurring a weld line in any of the layers. The crosshead (10) includes a supply passage (42), a distribution passage (46) which provides an annular flow of thermoplastic material around a mandrel (18) by providing separate flows that merge distal from the supply passage (42), a mixing passage (110) which serves as a first static mixer by dividing the stream of thermoplastic material into a plurality of streams (96) and subsequently merging the divided streams, and a forging passage (118) which serves as a second static mixer by compressively forging that thermoplastic material into a cross section of increased area prior to extruding the thermoplastic material through a die opening (38).

Abstract: A method and apparatus whereby tire mold is closed to within approximately one inch of full closure with a green tire in place therein for molding, and the mold is then evacuated employing a vacuum conduit prior to full mold closure whereby air within the mold cavity is evacuated and the necessity for vent holes in the mold is eliminated. A mold for practice in the invention is free of vent holes in the thread, sidewall, and bead portions of the mold and includes, along the parting line, at least one vacuum conduit whereby the mold cavity may be evacuated to not more than 16932 Pa within not more than about 60 seconds employing a source of vacuum. Seals are provided radially outward of the vacuum conduit along the parting line, and, where necessary, adjacent any moveable bead ring associated with the tire mold. Seals are preferably of a type wherein a differential between pressures experienced by one seal surface and obverse seal surface cause a more effective sealing arrangement.

Abstract: A cast iron die carrier member for the die closing unit of an injection molding machine having a machined die mounting face which is interrupted by a pattern of shallow face grooves on the surface of which the casting skin of higher resistance and lower elongation is retained, in order to stiffen the die carrier member against bending and distortion under an elevated die closing pressure. The die carrier member also has axially extended, vertically braced supporting flanges reinforcing the cantilever-type clamping connection between the member and the guide rails of the machine base to further stiffen the die carrier member against bending and to thereby reduce the long-term wear of the guide surfaces of the die closing unit.

Abstract: A box-shaped hollow form section which is used as a component of a concrete pouring form has two mutually inclined abutting upright panels and two end panels at the upper and lower ends of the upright panels to define therewith an elongated chamber affording access to the ends of conventional panels which can be connected to coupling members or boards bounding portions of the chamber and extending from the inner sides of the upright panels. The coupling members or boards have elongated slots to afford access to the ends of conventional panels, and such coupling members or boards define an elongated inlet which affords access to the chamber. The form section can be installed in the region which is to constitute the corner between two concrete sidewalls and a ceiling.

Abstract: A method and apparatus is disclosed for casting conductive and semiconduce materials. The apparatus includes a plurality of conductive members arranged to define a container-like area having a desired cross-sectional shape. A portion or all of the conductive or semiconductive material which is to be cast is introduced into the container-like area. A means is provided for inducing the flow of an electrical current in each of the conductive members, which currents act collectively to induce a current flow in the material. The induced current flow through the conductive members is in a direction substantially opposite to the induced current flow in the material so that the material is repelled from the conductive members during the casting process.

Abstract: Method and apparatus are disclosed using a robot to load and unload precut pieces of sheet molding compound and the like between an upper die and a lower die of a sheet molding press.

Abstract: A frank making apparatus for extruding a frank having a hollow interior filled with a condiment, such as chili, cheese, taco sauce or the like, includes a reciprocating stuffing horn assembly. The stuffing horn assembly includes concentrically arranged inner and outer stuffing tubes which are secured together and which reciprocate between advanced and retracted positions. The outer stuffing tube, when in the advanced position, is disposed in communicating relation with a metering pump connected to a source of sausage material so that the sausage material is extruded from a cylindrical chamber located between the inner and outer stuffing tubes.

Abstract: An apparatus for the introduction of a gaseous medium into a chamber, especially for compressing casting molding material with a high-pressure gaseous medium supplied by a pressure vessel linked with the chamber by means of a valve system. The system has a seat having traversing openings which can be covered or uncovered by a stroke-activatable valve plate. The gaseous medium flows freely round the surface of the valve plate. The valve plate also is provided with traversing openings which, however, are displaceably arranged vis-a-vis the traversing openings of the valve seat. To trigger a pressure shock from the gaseous medium necessary to effect compression, an elevating mechanism for the valve is activated to lift the valve plate. The pressurized gaseous medium then flows round, as also throughout the valve plate and acts on the surface of the chamber.

Abstract: A container mold comprising a mold cavity portion and a mold core portion with the cavity and core portions being relatively moveable between a closed and an open position. By this invention, means are provided for molding a recess-defining flange in the container.

Abstract: The alignment device or jig is utilized in aligning a shaft of a pelletizer perpendicular with a die face and includes a sensing/scraping assembly which is adapted to travel on a die face and scrape polymer drool off the die face until a scraping edge of the assembly is in constant contact with the die face during rotation of the jig on the shaft of the pelletizer. The scraping edge is mounted on the end of a rod which is spring biased toward the die face and which is axially movable in a bore in the jig and movement of the rod indicates nonperpendicularity of the shaft to the die face. After adjusting the skew of the shaft, cessation of movement of the rod in the bore in the jig will indicate a true perpendicularity of the shaft to the die face.

Abstract: A machine which makes building blocks from earth efficiently and rapidly has a pair of block forming molds at each end of the machine for simultaneously forming blocks at each end by means of a pair of rams. The hydraulic cylinder which actuates the two rams is located away from the axis between the two rams. The use of two molds eliminates wasted motion of the machine as a block is formed at one end of the machine as the ram is being retracted from the other end.

Abstract: A tablet press with a mould table and with multi-part rams whose movable ram parts slide along a stationary ram part having an internal hollow space connectable periodically to a suction device which removes, by suction mouldable material, dust which has penetrated in the interior of the movable ram, thus preventing the ram from being blocked with multiple material dust and making frequent cleaning and servicing of rams necessary.

Abstract: A frank making apparatus for extruding a frank having a hollow interior filled with a condiment, such as chili, cheese, taco sauce or the like, includes a reciprocating stuffing horn assembly. The stuffing horn assembly includes concentrically arranged inner and outer stuffing tubes which are secured together and which reciprocate between advanced and retracted positions. The outer stuffing tube, when in the advanced position, is disposed in communicating relation with a metering pump connected to a source of sausage material so that the sausage material is extruded from a cylindrical chamber located between the inner and outer stuffing tubes.

Abstract: The invention concerns a method and an apparatus for manufacturing a contact lens, through molding within water-tight molds. The polymerization of lenses is insured by arranging a number of molds within one or several sealed metallic chambers (9) constituting a resonant cavity of a unique mode for an ultra high frequency wave; these molds are positioned in an area of the cavity where the electromagnetic field approximately of ultra high frequency waves is homogeneous, and are distributed so that the amounts of basic composition to be polymerized act as a load fitted to the inside of said cavity.

Abstract: Disclosed is a tire mold for curing pneumatic tires wherein the mold includes a mold back, a tread ring and an insulator plate located between the mold back and the tread ring. The insulator plate is made of material that has a lower thermal conductivity than the thermal conductivity of the material in the mold back or tread ring. The addition of the insulator plate between the mold back and the tread ring induces reduction in heat transfer between the mold back and the tread ring allowing the maintenance of higher heat transfer for areas of the tire not shielded by the insulator plate and achieving the lower heat transfer in the area of the tire shielded by the insulator plate.

Abstract: The apparatus comprises a pair of calibrating rollers, rotating in opposite directions, therebetween a pre-extruded rubber profiled member may be inserted having a undefined cross-section, a driving kinematic link being further provided for driving both the calibrating rollers with the same peripheric speed.

Abstract: An hydraulic press for pressing plastic mats reinforced with glass fibers into formed parts, which press has a stationary and a slidable cross-piece as well as a press drive which drive for driving the slidable cross-piece has at least one adjusting cylinder with a stroke length corresponding to the working range of the press and at least two couplable press cylinders of short stroke wherein for coupling each press cylinder to the slidable cross-piece a coupling rod and a clamping means is provided, the press being distinguished in that in order to better accomodate incorporation of the press drive into an existing press, each press cylinder has a hollow lifting body through which an associated coupling rod is guided, and for coupling the lifting body to the associated coupling rod a clamping device is included on the lifting body.

Abstract: An isostatic press acts against a molding tool (4,5,11,12,32,33) enclosed in the pressing chamber of the press, the cavity (4) of the press tool being defined in the press by an enveloping wall (5) of an elastomeric material and two end walls (11,33) meeting the enveloping wall (5). The dry pressing chamber of the press is defined by a radially deformable elastomeric jacket (6) exercising pressure against the enveloping wall (5) of the molding tool, and two press end structures (2,3) meeting the pressing chamber jacket (6) and carrying the end walls (33,11) of the molding tool. At least one end wall (33,11) is carried by an adjacent end structure (3,2) via an elastomeric element (31). The elastomeric element is disposed with its peripheral edge exposed against, and lying adjacent the deformable elastomeric jacket (6) of the pressing chamber.

Abstract: A hydraulic press for non-refractory material consisting of a rigid framework and a vertically moveable press pad and horizontally moveable box section. A mold cavity is defined within framework and the press pad is contained within. Moveable box section delivers stock to mold cavity, forms cover over mold cavity during manufacture, and ejects formed unit from framework. A hydraulic cylinder is provided for movement of press pad during compression of unit and to raise unit for ejection from framework. A separate hydraulic cylinder is provided for movement of box section through framework. Both cylinders are fixedly connected to the framework. Hydraulic fluid, directed by solenoid-activated valves, provides movement of cylinders. Control means include an electrical circuit using relays, timmer, pressure actuated valve, and mechanical trip switches.

Abstract: A concrete forming system for constructing small diameter concrete columns with a refractory liner on the inside of the column wall. The present invention supports the inner and outer forms for the column wall on jacking frames which travel vertically on jacking beams attached to the wall. Loads created by plastic concrete are resisted by a system of radial supports which are attached to the inner concrete shaping forms and are supported by the jacking beams and jacking frames. After a portion of the column wall is poured, the next higher portion of the concrete column wall is formed by advancing the jacking frames and the concrete shaping forms upwardly along the jacking beams and reattaching lower sections of the jacking beams at the top of the jacking beams in order to provide a continuous track. The jacking frames and forms are raised on the jacking beams after a portion of the column wall is poured and the next higher portion of the concrete column wall is to be formed.