Abstract: The apparatus includes a gripping device (3) for picking up the parts (1, 2) to be joined and at least one screwdriver (6) comprising a screw spindle (10) and a drive (11) for the screw spindle. The screw spindle (10) is resiliently mounted for movement in the direction of the screw feed and it may be laterally adjusted in each of two perpendicular directions so as to permit an accurate alignment of the screw with the parts to be joined.

Abstract: A method of making a sand core assembly, comprising: providing two or more sand cores parts with accurately mating surfaces and an injection port in at least one of the sand core parts that intersects with a desired portion of the mating surfaces, the core parts cooperating to define at least one molding surface; mechanically dry mating the core parts together at the mating surfaces to eliminate any space therebetween except for microfissures at the mating surfaces; and injecting a limited quantity of quick-setting (i.e., organic polyamide) adhesive into the port with a controlled pressure and viscosity effective to migrate the adhesive throughout the port but no further than the microfissures spaced from the molding surface. After the adhesive has set, the mated core assembly parts may be assembled into the mold, iron inserts inductively heated to about 600.degree. F. and molten metal poured into cavity, with only the adhesive to hold the suspended core parts in place.

Abstract: A composite core for a hollow gas turbine engine blade is constructed by forming a first core part determinative of the cavity size of the trailing edge blade portion from a first ceramic material and joined to a second core part determinative of the blade cavity for the blade body portion which is formed from a second ceramic material. The first and second ceramic materials can be chosen to have appropriate characteristics grain sizes, flowability, leachability, and/or reactivity characteristics taking into consideration the different dimensional restrictions imposed by the desired blade product. A tongue is formed on the adjoining edge surface of the trailing edge core part, and the trailing edge core part is then inserted into a second die and the body core part is formed, including a complementary groove member which is formed around the tongue member on the trailing edge core part. The joined trailing edge and body core parts can then be sintered to form a composite casting core.

Abstract: An expendable core is positioned in the molding cavity of a die casting die including hollow mounting pins affixed to the die which mate with recesses formed in the expendable core. Vacuum applied to the recesses through the hollow mounting pins anchors the core in the die cavity.

Abstract: A method and apparatus are described for the production of piston castings, and, in particular, a die construction and method of use thereof are described, the die having a crown forming part (18) separable from a skirt forming part (12). In the method, when solidification of the casting occurs to an extent at least enabling the separation of the skirt forming die part therefrom to be allowed, and the die parts (20, 22) are separated, the casting is retained by the crown forming part (18) of the die. After a subsequent process step, such as the solidification of the remainder of the piston casting, and or the cooling of the piston casting by an air blast (64), the solidified piston is removed from the crown forming part of the die.

Abstract: A process of casting a scroll member for a scroll compressor including forming the scroll wrap member portions of equal height. Unequal cooling of the scroll wrap when formed causes the hardness of the wrap to vary from radially outside to radially inside. The radially outside portions of the scroll wrap are formed harder therefore reducing wear-out of the scroll member while the radially inside portions are formed softer, thereby permitting quicker run-in of the scroll set during initial startup of the scroll compressor.

Abstract: Reusable core apparatus for a casting mold is disclosed. The apparatus includes a first core mechanism for being disposed in a casting cavity of the mold to define a first internal casting surface within the cavity, a second core mechanism for being disposed in the casting cavity to define a second internal casting surface in the casting cavity, and a securing mechanism for securing the first and second core mechanisms together in a predetermined engaging relationship within the casting cavity. The securing mechanism is adapted to maintain the first and second core mechanisms in the predetermined engaging relationship while an article is being cast in the mold and to release the first an second core mechanisms from the predetermined engaging relationship after the casting process so that the first and second core mechanisms may be directly and easily disengaged with each other and from a cast part so that the first and second core mechanisms may be reused in casting additional parts.

Abstract: The invention relates to a process for casting novel motor vehicle wheels from metal, such as from an aluminum alloy, which wheels have a rim ring and a hub part connected by supporting radial elements. According to the present process the casting mold is formed by a plurality of molded core parts that are mainly ring- and/or disk-shaped and which are axially assembled while still attached to their mold sections and are centered relative to each other by the relative adjustment of the mold sections. The parting plane of the core parts runs perpendicularly to the wheel axis. This permits one-piece wheels to be cast with great accuracy, which wheels have few, if any, visible mold seams.

Abstract: A three-way wet barrel fire hydrant includes an enlarged intermediate barrel section, which effectively reduces pressure loss in the fire hydrant. The hydrant barrel is formed by an improved sand molding process which requires the mold parting line of the barrel to be selected to coincide with the centerline of the upper nozzle opening. In this manner, a pattern which forms the sand mold may be removed cleanly from the molding sand, thereby eliminating the need of multiple side cores during the casting process.

Abstract: A decomposable casting core (56a, 56b) is formed in-situ with a sleeve-like liner member (64) and the assembly mounted within the mold cavity (24) of a cylinder block casting mold (22) for lining piston cylinder chambers (62a, 62b) of a cylinder block (26) cast within the mold (22). The liner member (64) is formed with an inner annular recess (80) which receives a corresponding annular projection (76) of the core (56a, 56b) for preventing the liner (64) from sliding axially on the core (56a, 56b) during casting.

Abstract: A press casting machine (2) is provided with a stand (4) and a lower stationary machine table (5), from which bearers (6) project upwards, supporting an upper vertically displaceable machine table (7). A tool half (9 and 10 respectively) is connected to each machine table. These halves form, jointly with inserts, cores, etc., mounted in the halves, a parent tool (8). In order to be able to exchange inserts, to service the machine etc. the tool halves can be disconnected from and reconnected to the respective machine table through an external control, and the entire parent tool can be lifted by means of the upper machine table and be positioned on a tool carriage (60), which can be run out of the press casting machine and onto a main carriage (61), which runs on floor rails (64) and which can support a second parent tool for a quick exchange.

Abstract: The present invention pertains to an apparatus for casting which includes a melt chamber within which a metal is disposed. The melt chamber includes means for melting the material. A mold chamber is disposed beneath the melt chamber comprised of a mold defining a mold cavity within which the metal is formed and a preform is disposed. There is also a riser cavity fluidically connected to the mold cavity for holding a charge of melted metal. There is also provided means for fluidically connecting the melt chamber to the mold chamber and a valve element for controlling the flow of metal through the connecting means such that when the connecting means is opened, the chambers are fluidically connected and when the connecting means is closed, the chambers are fluidically isolated. The mold chamber has means for evacuating the mold chamber and means for pressurizing the mold chamber such that the melted metal disposed within the riser cavity is forced into the preform.

Abstract: Cast vehicle wheels are formed with a re-entrant portion or lightening pocket beneath the tire bead retaining seat. The mold has movable side portions enabling the formation of the re-entrant portion in the wheel. The re-entrant portion reduces the weight of the wheel without adversely affecting the wheel characteristics.

Abstract: The unitary cylinder head and liner combination, is vertically cast as a one piece unit. The liner incorporates a water jacket therein. The water jacket is draftless, allowing water to circulate therethrough more efficiently, increasing cooling capabilities. Such vertical one piece casting is made possible by a novel two piece core which eliminates the need for welding of metal bands onto an outer surface of the liner to produce the water jacket thereof. A novel method of vertical casting is also provided which allows the cylinder head to be cast integral with the liner, allows for increased water capacity in the liner and integral head passages, and allows for a plurality of enlarged air intake channels to be provided.

Abstract: Disclosed is a single-cast, thin wall structure capable of withstanding impinging gases at temperatures of 4300.degree. F. and higher, and method of making the same. Using a bleed line of the instant invention allows for a decreasing metal pressure with respect to time which prevents any damage to the thin outer mold wall.

Abstract: The method of making a golf club head comprising a shell having a ball striking face, a top wall, a bottom wall, a rear wall, and toe and heel walls, the steps that include forming a head core consisting of a mixture of particles of sand or the like in a binder; providing a core arbor extending into the core and also externally thereof; and casting molten lightweight metal about the core and about the arbor to form the shell walls.

Abstract: The framed printout is connected to an expendable core for a high-pressure die casting die, which printout is spaced outside and surrounds the cavity in the die. The casting and its cavity in the die has at least one open side into which the core is positioned, such as to form a jacket around a cavity in a casting. The die has in its parting surface a pocket for seating the frame of the printout and its connections to the core, which pocket is spaced from and is outside the casting cavity in the die.

Abstract: Lower structure of a mould for the pressure casting of flat products such as slabs and method for mount and removing the lower spacer of this mould is provided. The lower structure of the mould includes an intermediate beam (26) resting freely on a frame (3) whose upper surface opposite to its surface bearing on the frame (3) carries a lower spacer (4) which is fixed by clips (37) on the beam (26). At least one positioning pin (54) is engaged in a housing (55) at the front part of the frame (3). A plurality of members (47) for holding the intermediate beam (26) on the frame are distributed according to the length of the beam (26). These members each comprise a part (46) which can be engaged longitudinally in a coupling device (45) attached to the beam (26) and which can be actuated in order to hold the beam (26) on the frame (3) or, on the other hand, in order to release it.

Abstract: An improved cast power transmission disk and method of forming the same, the disk including a peripheral rim having at least one power transmission unit spaced from a hub with an integral body portion therebetween, a major portion of the rim and hub and the entirety of the body being formed on one side of a mold parting plane along with preselected areas of build-up, chamfering and draft angles and the remaining minor portion being formed on the opposite side of the mold parting plane.

Abstract: Sand cores are bonded to form an assembly, using paste usually containing clay or silicates. Bonding is carried out by (a) coating at least one interfacing surface of intermating core parts with paste in a thickness of about 0.005-0.20 inches; (b) mating the coated interfacing surface of one core part to the other core part to form an assembly; and (c) subjecting the paste in the assembly to microwave energy at an energy level of about 5-7 kilowatts to effectively dry the paste in a manner proceeding first from the interior of the paste body to its outer peripheral extremities. The subjection to microwave energy draws the core parts closer together by shrinking the paste coating and by causing the paste to boil and drive the paste into pores and/or voids of the intermating core surfaces; such subjection is preferably carried out for a time period of 10-30 seconds.

Abstract: A closed mold for a cylinder head is provided having two widely spaced wall portions, at least one of the widely spaced wall portions being in communication with the atmosphere through an opening in the closed mold. The widely spaced wall portions define the ends of a long open cavity within the mold and provide core supporting portions for a long, narrow core element adapted to form an elongated, narrow open cavity within the casting. A narrow core element is provided between the core supporting portions of the widely spaced wall portions of the mold without intervening support. The long narrow core element comprises an outer portion of casting sand adapted to form the walls of the elongated, narrow open cavity of the casting extending between the core supporting portions. The narrow core element further comprises an inner portion for supporting the long, narrow core element and for providing a gas passage extending to the one wall portion.

Abstract: Flat metal products are pressure cast in a mould having two lateral walls each consisting of a support and of a graphite block as well as several spacers, including an upper spacer interposed between the blocks. The ends of the upper spacer and of the front spacer are inserted between two half-shells intended to receive a header of molten metal at the end of the cast. Elastic members carried by the supports exert during the cast, a clamping force of the half-sheels on the spacers. After the start of solidification of the slab, the clamping force is reduced by lateral jacks which eliminate any resistance to contraction of the slab and thus prevent the formation of cracks at the slab/header transition.

Abstract: A process for the manufacture of a master cylinder for hydraulic brake units of automotive vehicles. The starting material is a pasty material which is between solid and liquid. In the course of the casting procedure, thin material wall thicknesses are created in the regions of intended openings of the master cylinder, such as the breather bore (14) and the intake bore (5). The floating membrane (12) which forms during the casting process is removed by mechanical machining to open the duct which functions as the intake bore. The breather bore (14) which functions as the compensation bore is formed by a stamping operation.

Abstract: A one-piece cylinder head casting, including reliably located passageways for fuel-air intake, for exhaust and for coolant, is formed by a plurality of interengaging one-piece core elements including a one-piece coolant jacket core, a one-piece exhaust core and a one-piece fuel-air intake core, all reliably positioned and held together in an integral core assembly. Preferably, a further core element having a plurality of core supporting and positioning surfaces provides surfaces that mate interfacing surfaces of the one-piece water jacket core, one-piece exhaust core and one-piece intake core and support such cores in position with respect to one another, and the intake core may be provided with a plurality of interfacing surfaces to lock the plurality of core elements into a unitary core assembly. Such cylinder head casting may also be provided with integral walls forming a long, open intake manifold cavity in the side of the cylinder head.

Abstract: A core mask is mounted on a rear plate which is designed to establish a vacuum or a pressure for holding the core or cores in the mask. A unit including a mask and rear plate is stored in a magazine near a core setting system. The unit is transferred from the magazine to the core setting system, where it is positioned and fastened so that it can be released while at the same time a fluid connection is established between the unit and the core setting system. The unit is removed after use from the core setting system by release of a lock and the unit is returned to the magazine.

Abstract: Individual mold sections are injection molded from a slurry of ceramic particles and a binder. Each of the green individual mold sections is low temperature fired to remove therefrom a major portion of the binder while leaving therein a minor portion of the binder sufficient to afford structural strength thereto, and the individual mold sections are assembled together to form a mold. Finally the mold is high temperature fired to complete removal of the binder.

Abstract: A method for making a blind fastener that has a flanged outer sleeve and a flanged inner sleeve that are secured together, wherein the outer sleeve has a socket that receives a lug from the inner sleeve to provide joint axial movement and wherein the outer sleeve has a plurality of slits that receive at least one radial projection from the inner sleeve to prevent rotation between sleeves. The inner sleeve has a thinner upper portion and a thicker lower portion with a score line therebetween to facilitate the separation of this portion. The inner sleeve has a central threaded bore to receive a threaded bolt for fastening purposes and to upset the outer sleeve relative to the flanged portion thereof to secure such fastener to a thin workpiece.

Abstract: The tapered core/shell lock includes notches which, in conjunction with protrusions from the shell mold, prevent axial slip of the core main body. In addition, the core/shell lock provides a tapered core print area which is much larger, and extends further into the shell mold, then the conventional "T" bar core/shell lock. By increasing the axial length of the core print area, shifting at the tip of the core main body is reduced, while tapering of the core print eliminates the need to lacquer slip the end of the core/shell lock, eliminating addtional sources of core shift.

Abstract: A sand core adapted for high pressure casting is formed by a core body and a support pin to be connected to the core body. The support pin is provided with one end portion to be embedded in said core body and the other end portion projected outwardly from the core body. A connecting means is formed to the embedded portion so as to integrally connect the core body and the support pin and a support pin positioning and supporting means is formed at the projecting portion of the support pin. Positioning pins extending from a core formation mold are engaged with the positioning and supporting means so that the embedded end portion of the support pin is positioned in the cavity of the core formation mold. The cavity is filled with core sand whereby the embedded one end of the support pin is supported to integrally form the support pin and the core body. The sand core is dipped in a slurry including a sand core coating material and then heated and dried.

Abstract: An injection apparatus includes a plunger, an injection sleeve, a sleeve frame, and a rotational-linear motion transmission mechanism. The plunger is supported at a substantially central portion of a supporting frame. The injection sleeve is provided to be movable forward/backward with respect to the supporting frame and receives a distal end portion of the plunger such that the distal end portion can move forward/backward. The sleeve frame supports the injection sleeve. The rotational-linear motion transmission mechanism is arranged between a motor and the supporting frame and converts a rotational motion into a linear motion.

Abstract: Though holes are provided in a suitable area of the cores during the formation thereof in a first blowing machine, such that, on adjoining the cores, to form the block, and in the absence of additives between the contacting surfaces thereof, the through holes are placed one adjacent another. Then a housing is defined, which affects the entire block in a longitudinal direction, and which subsequently molds a mixture of sand and a binder material, similar to a core in a second blowing machine. The material after hardening, acts as a coupling and stiffening arrangement between the cores forming the block.

Abstract: A clamping system for traversing and clamping molds in a molding machine, the clamping system including a toggle-type clamp arrangement defined by a plurality of pivotally connected links. A movable crosshead is carried on a crosshead guide, and a ball screw is non-rotationally secured to the movable crosshead to extend in the direction opposite from the face of a cooperating fixed mold portion. A pair of ball nuts are carried by the ball screw and each of the ball nuts is drivingly connected with a respective servomotor. One of the servomotors is adapted to provide rapid traverse movement for the movable crosshead, and the other servomotor is adapted to provide high torque for high clamping force to hold a pair of mold halves in tightly contacting relationship during the injection into a mold cavity defined by the mold halves of a flowable material under pressure.

Abstract: The ceramic core is located within the ceramic mold by the insertion of recrystallized alumina pins through the wax encasing the core prior to encasing the whole in a ceramic slurry; on the subsequent removal of the wax, the molten metal, i.e. superalloy, is injected into the resulting space; the recrystallized alumina pins remain intact during the casting process hence substantially increasing the success rate of achieving accurate core locating during casting solidification.

Abstract: A paper sleeve and system for application as an insulated riser in a sand mold used to cast metal articles is disclosed. The sleeve, preferably cylindrical, is formed from a plurality of sheets of paper wrapped around one another with, preferably, a space between the edges of each sheet to provide a plurality of spaces or openings extending through the sleeve. Each sheet is treated with a precise amount of fire retardant. The sleeve for a given time period acts as an insulator keeping metal therein liquid until the metal solidifies in the article forming cavity of the sand mold and thereafter decomposes or reduces itself to a harmless carbon ash. The sleeve can function to both feed liquid metal to the article forming cavity in a sand mold and also to supply additional liquid metal to the article cavity upon solidification of the metal therein to eliminate the need for separate risers as now required in conventional foundry practice.

Abstract: This disclosure concerns a casting die for a cylinder, including engine blocks having a plurality of cylinders such as for internal combustion engines, including an expendable core for forming a jacket around the cylinders. This core has a printout portion at one end of the cylinder which is held in place by a cooperating flange on a mandrel that fits inside the cylinder. This mandrel may hold a liner for the cylinder. A dowel is provided in one of the die parts for insertion into the hollow mandrel. The mandrel is held in position by being clamped between the two opposing die parts, and the flanges of the core printout portion may be loosely held in the printout cavity of one of the die parts which preferably also contains one or more locating pins for bridging at least part of the gap between the printout portion and the printout cavity in the die for better positioning the core in the die.

Abstract: The present invention relates to wax impregnated filters for use in investment casting applications and a method for forming them. The filters are characterized by a wax impregnated ceramic substrate, wax layers bonded to two opposed surfaces of the substrate, and peripheral edges having exposed ceramic surfaces which can be adhered to the ceramic liner of an investment casting apparatus. The method comprises providing a sheet of ceramic foam filter material, impregnating the sheet with sufficient liquid wax to form a wax layer of desired thickness bonded to each of two opposed surfaces of the sheet, allowing the wax to solidify, and precision cutting the impregnated sheet into filters having a desired set of dimensions. The method further comprises exposing the peripheral edges of each filter to allow the ceramic shell building or liner in the investment casting apparatus to bond directly to the filter.

Abstract: A mould (61) for metal casting has a mould cavity (62) and a sprue (63) communicating directly with the mould cavity (62) and located in the sprue (63) a sleeve (64) of refractory material having a cellular ceramic filter (65) fixed therein. The mould, which has no running system apart from the sprue, may be a sand mould or a metal die for producing castings by gravity or low pressure diecasting. The cellular ceramic filter may be a honeycomb type of structure having cells which extend between two outer surfaces of the filter or a structure having interconnecting cells such as a ceramic foam.

Abstract: The mold is equipped with a casting ring 6 which is formed by clamping together four generally rectilinear wall segments 8 that are, first, arranged like the sides of a picture frame about the rabbet 52 of a rectangular case 10, and then abutted together, sash-like, at their mitered ends 80, to form a ring, the casting surface 9 of which will produce the rectangular cross-sectional outline common to sheet ingot or the like, when molten metal is fed through the ring. The clamping action is produced by a set of screws 94 at the corners 10' of the case, and after the ring 6 is clamped about a pair of spaced, axially opposing lips 54 and 60 on the case and an annular plate 14 thereabove, the plate 14 is clamped to the top of the case, to secure the ring in place and seal the axial ends of the ring against fluid flow thereacross.

Abstract: An apparatus and method is provided for producing castings from low melting point alloys which expand upon hardening for use in radiation treatment. An apparatus (10) is provided with a resilient ring (22). As the alloy expands in cooling, the resilient ring deforms outwardly to accommodate the expansion. The molding apparatus (10) can then be disassembled to remove the hardened plate with little risk of harm to the plate.

Abstract: Channels or apertures are provided in a suitable area of the cores during the formation thereof in a first blowing machine, such that, on piling of the cores to form the block, and in the absence of additives between the contacting surfaces thereof, the apertures or channels are placed one adjacent another. Then a housing is defined, which affects the entire block in a longitudinal direction, and which subsequently molds a mixture of sand and a binder material, similar to a core in a second blowing machine. The material after hardening, acts as a coupling and stiffening arrangement between the cores forming the block.

Abstract: A method for forming an as-cast hole by using a core involves forming an undercut and casting by using a core die which is slidable at an angle with respect to mold closing and opening directions. At the same time, an as-cast hole with an axial direction different from the slide direction of the core die is formed. To form the as-cast hole, a floating core is slidably disposed in the core die for movement in the axial direction of the as-cast hole. An apparatus for practicing the method includes a stationary die, a movable die and the core die containing the slidable floating core.

Abstract: A helical compressor having hollow male and female rotor components of the type used as a supercharger for an internal combustion engine. The compressor is provided with a manifold plate which cooperates with the manifold to evenly distribute the high pressure discharge from the compressor throughout the associated plenum or manifold. The hollow rotor components are cast by full mold casting techniques in which an expendable foam pattern is first made in a metal mold and then placed in a sand-filled flask and poured with an appropriate foundry metal. The interior and exterior surfaces of the rotor pattern parts having helically extending lands and grooves permitting helical ejection of the pattern parts from the mold.

Abstract: A method for producing an outer stabilizing band or bands at the unsupported end portion of the air foils changes the configuration from an unsupported cantilevered airfoil to a baband supported airfoil during the forming of the mold and casting of the product. Such band or bands, which are later shaved away, permit dimensional stabilization and provide an outer wall for venting, fill-out, and inclusion trapping. The stabilizing band or bands are extremly thin, normally in the range of 20 to 60 one thousandths of an inch, which avoids the need for gating and minimizes the amount of machining required to remove such stabilizing band or bands from the integral airfoil and hub casting. The bands may be outside the end of the airfoil or flush with the ends of the airfoil. The procedure and method for incorporating the outer band or bands into the casting begins with the process of making the pattern. It also aids in the stabilizing of the configuration of the pattern thereby achieving more dimensional accuracy.

Abstract: An adhesive paste for adhering two or more objects, a composite assembly comprising two or more elements bonded by such paste, and a process for preparing cast metal articles using such paste are provided. The adhesive paste comprises an aqueous solution of a specific alkali phenol-formaldehyde resin and a hardener for that resin, wherein the paste prepared by mixing the resin and hardener has a viscosity, as mixed, in the range of about 1,000 cps to about 15,000 cps. The composite assembly comprises at least two separate elements bonded by the adhesive paste of the invention. The process uses a mold or core assembly having at least two separate elements.

Abstract: The handle is made by casting in a two part mold. The lower mold part includes a vertical split post having two vertical spaced posts with their upper ends in the form of lateral tabs. The upper mold part has a flat wall member cooperating with the lateral tabs.

Abstract: A vertical die casting apparatus comprises a mold clamping unit having a mold axis and a tilting injection unit. The mold clamping unit in cooperation with a machine base is made to swing about a rotation axis from a normal horizontal axis position at which the mold axis extends horizontally and the injection unit is actuated for a vertical injection, to a vertical axis position at which the mold axis extends vertically, and a disintegratable core incorporated in the mold to define a mold cavity.

Abstract: A pair of guide pins are mounted on sideplate extensions of the caster and mating roller pairs are mounted on the nozzle assembly. The nozzle is advanced toward the caster so that the roller pairs engage the guide pins. Both guide pins are remotely adjustable in the vertical direction by hydraulic cylinders acting through eccentrics. This moves the nozzle vertically. The guide pin on the inboard side of the caster is similarly horizontally adjustable. The nozzle roller pair which engage the inboard guide pin are flanged so that the nozzle moves horizontally with the inboard guide pin.

Abstract: A molding system including a mold and a molding machine has been adapted to monitor the position of first and second mold surfaces that move relative to each other to form a mold cavity. The system includes a source of gas under pressure and an orifice on a first molding system surface to direct a flow of pressurized gas from the first molding system surface. A monitoring system monitors the condition of the gas remote from the first molding system surface to indicate the spacing between the first molding system surface and an adjacent second molding system surface as the first and second molding system surfaces move with respect to each other.

Abstract: A hypereutectic aluminum-silicon casting alloy having particular use in casting cylinder blocks for marine engines. The alloy is composed by weight of 16% to 19% of silicon, 0.4 to 0.7% magnesium, up to 0.37% copper and the balance aluminum. With the stated silicon content the alloy has good fluidity and the precipitated silicon crystals provide excellent wear resistance. In addition, the alloy has a narrow solidification range of less than 150.degree. F., thereby providing the alloy with excellent castability. The copper content is maintained at a minimum so that the alloy has improved resistance to salt water corrosion.

Abstract: In a method of producing cores for foundry purposes, with the cores being composed of at least two core sections and being firmly joined with one another, the individual core sections are molded separately in a core mold composed of at least two mold sections. At the end of a molding process for the individual mold sections, their core mold is opened in such a manner that the core section remains connected with a mold section. Then the individual core sections to be joined, together with their mold sections, are moved into an assembly position and are joined together by defined relative movements of the mold sections with respect to one another. After the joining process, the one mold section is released first and then the assembled core is ejected from the other mold section.