Abstract: An apparatus and method are provided for producing extrusions of two or more materials such as plastic polymers so as to utilize the characteristics of both materials in a single formation thereof. In one form, flexible and rigid polymers are coextruded through a common die to form selected portions of the length of an extrusion or to form portions of the length of an extrusion composed of one polymer and other portions composed of the same polymer plus a second polymer. Tubing may be formed having portions of its length made completely of a flexible polymer and other portions thereof made of a rigid polymer. The apparatus mahy also form rigid pipe having elastomeric material coated or extruded along selected lengths thereof such that when severed along said lengths, selected pipes may be formed thereof containing end seals formed integral with each length.

Abstract: A method and apparatus for the shaping and cutting of bread dough which forms the dough into a bar or belt shaped strip, stretches the dough, cuts the dough and overlaps the dough.

Abstract: A method of rebuilding the eroded area of an ingot mold such as used in casting steel ingots places a metal producing exothermic compound in a cleaned eroded area of the ingot mold to be rebuilt, ignites the compound and confines the molten metal produced by the exothermic reaction to the eroded area where it forms a welded bond with the metal of the ingot mold and fills the eroded area. A protective metal coating of a suitable welding rod metal may be deposited by electric arc or flame welding on the metal patch formed of the exothermic material.

Abstract: A flash control molding is provided for use in association with a pattern for forming a casting cavity in a metal casting mold. The flash control molding includes an elongated strip of pliable material having a predetermined cross sectional configuration to define a thick portion for forming a flash control chamber in the mold, and a thin edge along one side of the thick portion to form a restricted opening between the flash control chamber and the casting cavity so that a casting subsequently produced in the mold is formed with controlled shaped flash which has a built-in fracture line immediately adjacent the casting proper, thereby making the flash easily and cleanly removable from the casting.

Abstract: A control system and method for controlling the oxygen content in continuously cast metal. The control system includes means for sensing the oxygen content of the molten metal at a first point upstream from the casting mold, either means for measuring the rate molten metal enters the casting mold or means for supplying molten metal to the casting mold at a constant rate, oxygen addition means for adding oxygen to the molten metal before it enters the casting mold, and control means for controlling the oxygen addition means in response to both the rate metal is supplied to the casting mold and the oxygen level of the molten metal at the first point. In the method of the invention, oxygen is added to the molten metal intermediate the first point and the casting mold in response to the oxygen content of molten metal at the first point and the rate molten metal enters the casting mold.

Abstract: A vacuum casting machine has a rotary table obtaining motion from a self-contained drive and accommodating chambers with casting molds. In turning, the rotary table causes each of the chambers to register in succession with an opening in a melting chamber through which metal is being poured. This arrangement of mold chambers enables partial overlapping in time of such processes as preparing a mold for pouring, the melting of charge and accumulating melt in the melting chamber in a requisite amount, and the cooling of each mold with the casting. This all considerably increases the production rate of the machine.

Abstract: An ingot mold of the bottle-top type and method for its use wherein the primary pipe or shrinkage cavity at the top of the ingot is decreased in length and a solid bridge is formed between the primary and secondary pipe cavities, sealing off the secondary cavity. The cast ingot is cropped in the area of the solid bridge between the primary and secondary pipe cavities, leaving the secondary cavity sealed such that it can be welded without oxidation during hot rolling to increase the ingot yield.

Abstract: A method and apparatus for of starting the continuous casting of a first metal in the mold of a continuous casting machine, in which a molten second metal having a melting point lower than that of the first metal is first introduced into the mold of the casting machine at a temperature substantially below the melting point of the first metal and in which the introduction of the second metal is discontinued and the casting of the first metal is begun after cooling of the mold has caused the second metal to form a solidified plug within the mold and while the cooling of the mold continues. The apparatus includes means for the sequential casting of the second and first metals in a casting machine while the casting machine is being cooled and the method allows metals of very high melting point, such as steel, to be continuously cast without damaging the mold or creating undue danger to the operator.

Abstract: Concrete pipe is molded between concentric steel cylindrical shells in which there are openings on each side receiving plastic inserts defining respective keyed cavities that remain in the molded concrete pipe after curing and removal of the concentric steel shells so that large keyed eye-bolts may be inserted in the respective keyed inserts. The initial positioning of the plastic mold keyed insert is accomplished by means of a keyed plastic plunger mounted on an attaching plate which includes notches on each side to fit over attaching screws on each side of the outside steel shell. The plunger has a keyed end. The hollow plastic insert with a soft gasket around the top has a keyed plunger inserted under pressure therein for removal therefrom and replacement by the eye-bolt after the curing of the pipe is completed.

Abstract: An apparatus for applying road marking lines to a roadway which includes a pair of spaced plates movable with the apparatus to guide the line width. The spaced plates are also provided with a gas outlet opening to guide the marking material away from the plates onto the roadway to be marked.

Abstract: This invention relates to an improved seal for injection molding mechanism. The lower nozzle portion of a heater with the reciprocal valve pin extending centrally therethrough extends downwardly to the gate in the mold. The generally cylindrical seal is horizontally located in an outward upward flare of the air space between the lower nozzle portion and the mold. The seal has a V-shaped lower surface which provides inner and outer circumferential lips which prevent the pressurized melt from flowing upward past the seal. The outer wall of the seal extends across the flare of the air space with only a portion of the outer lip abutting on the mold, thus substantially reducing heat loss from the heater through the seal to the cooled mold.

Abstract: Process and apparatus for casting liquid metal in an ingot mold consisting of opposed cooled casting surfaces, at least one of which is convex, and one of which consists of a series of joined shutters. A high pressure is applied to the metal moving between the two surfaces during the solidification of the metal.

Abstract: A method of making a number of foundry cores serially in which a foundry aggregate mixed with a curable binder is introduced into a core box cavity to form each green core which is gassed by passing into it a predetermined dose of a saturated vapor under pressure of a normally liquid curing agent for the binder and an inert carrier gas and then a purging gas is passed through the core to drive out unreacted curing agent. A ready supply of a saturated vapor of the curing agent is provided in a generating vessel. Once a body of the active liquid substance and overlying atmosphere of vapor is established in the generating vessel, the vapor is dispensed intermittently to the core box cavity in a series of bursts, one for each core gassed. Simultaneously with the dispensing of each burst, carrier gas is bubbled under pressure into a bottom zone of the vessel in minute bubbles so as to provide saturated vapor, replacing that dispensed.

Abstract: In a core-blowing machine, the improvement consisting in that the inner wall of the ramming frame has a plastics material coating, the latter having a protrusion in its top edge area. This protrusion abuts the sandslinger head. Wear of the ramming frame is drastically reduced and a better air venting of the flask is ensured.

Abstract: An arrangement is provided for feeding a liquid alloyed metal under protective atmosphere into a high speed continuous casting machine for casting a strip of alloyed metal, preferably calcium lead which is subsequently formed into battery grids and the like. The arrangement includes atmosphere tight holding and melting pots constructed of steel plates with submerged electrical heating elements, a level control arrangement for the liquid baths therein and a skid ramp in the melting pot for charging metal hogs therein.

Abstract: An apparatus for casting a molten material in which the mold is received in one chamber and the molten material is received in another chamber, the two chambers being subject to different pressures so that a tube connecting them can deliver the molten material from the second chamber to the first under a pressure differential. Signal-producing apparatus connected to the mold chambers produce signals representing the two pressures and the pressure differential, the signal-producing apparatus being connected to differentiating apparatus whose output produces time derivatives of the pressures and pressure differential. The time derivatives can be used to control the pressures via a comparator to which a reference value or set point signal is applied thereby varying the rate of filling of the mold in accordance with a predetermined program.

Abstract: A stronger, thinner shell mold suitable for making cast metal parts comprises a base member of resin bonded sand and a second surfacing layer of a cured thermosetting binder material. Also disclosed is a method for forming the new shell mold.

Abstract: Apparatus for heavy duty tapping operations includes a compact, lightweight, hydraulic tool unit and a remote hydraulic power unit, with the entire apparatus being designed for portability. The tool unit includes an elongated housing having a high torque, low speed hydraulic motor with internal reduction gearing, for directly driving a spindle supported in the housing for rotation and longitudinal movement. The spindle includes a lead screw coacting with a lead nut mounted at the spindle end of the housing. The spindle is directly driven by the motor drive shaft through a spline drive coupling; and the spindle is fully supported by the lead nut and drive coupling. Reversing and stop control devices control the tapping and retracting limits of movement of the spindle; and the design provides for minimum damage to the tool unit in the event of failure of the reversing or stop control devices.

Abstract: An automated apparatus for sequentially forming integrally fused battery terminals on a plurality of storage batteries is described wherein a head means having a mold means adjustably mounted thereon is automatically movable with respect to a vertical axis, and has slidably mounted thereon a burning means for automatically producing a variable-intensity flame for melting said battery elements to form said integrally fused battery terminal during a vertical stroke thereof. An automated post burn station is further described having a conveyor means for advancing batteries sequentially to said burning station and for aligning said batteries with respect to said station for the above described fusing process. A plurality of novel sensors incorporated into the automated post burn station facilitates the rapid, automatic processing of batteries, while providing a high degree of safety and reliability.

Abstract: .Iadd.Apparatus to produce widenings at tube ends with precise dimension of the inner surfaces of the widened zone which includes a holding device for the tube to be worked, a variable form core arranged axially in front of the center of the holding device, a device for axially displacement of the core, a cylinder axially movable over the tube for exterior calibration and adaptation of the tube end to the core, and a device to bring the core to a shape in which it can be drawn from the formed tube end. .Iaddend.