42 results about "Cope and drag" patented technology

A method for manufacturing a railcar coupler knuckle includes providing a cope mold portion and a drag mold portion, the cope and drag mold portions having internal walls defining at least in part perimeter boundaries of a coupler knuckle mold cavity, wherein the mold cavity includes a finger section; positioning at least one internal core within either the cope mold portion or the drag mold portion, the at least one internal core configured to define a kidney cavity and a pivot pin cavity within a coupler knuckle; closing the cope and drag mold portions with the single core therebetween; and at least partially filling the mold cavity with a molten alloy, the molten alloy solidifying after filling to form the coupler knuckle, wherein the at least one core defines the kidney and pivot pin cavities, and the finger section of the mold cavity defines at least one finger cavity of the coupler knuckle.

A method for manufacturing a railcar coupler knuckle includes, before casting, positioning an external chill within a cope mold portion and a drag mold portion offset from and adjacent internal walls of a pulling face and a throat of the cope and drag mold portions, thus producing a casting with reduced micro-shrinkage in at least the throat, a high-stress section of the casting. Use of subsurface chills produces an improved surface with fewer inclusions when compared to an equivalent surface produced in a process without use of a subsurface chill. The external chill may be a cone chill of a larger size to improve cooling and solidification at and below the surface. The external chill may also be a cylindrical and / or oblong chill with a tapered design that may correspond to the internal walls of the cope and drag mold portions between the pulling face and the throat.

The purpose of the present invention is to provide a method to efficiently make flaskless upper and lower molds, to efficiently spray a release agent in a closed space, and to promptly place a core.The invention is a method for making flaskless upper and lower molds that are stacked, comprises the steps of holding a match-plate between one pair of cope and drag flasks that are horizontally positioned, each of them having an sand-filling port for supplying molding sand at its side wall, defining upper and lower molding spaces by inserting upper and lower squeeze-plates to the respective openings of the pair of cope and drag flasks which openings are opposed to the match-plate, putting the pair of cope and drag flasks and the match-plate in a vertical position, and causing the sand-filling port to be placed in upper position, spraying a release agent to the two molding spaces in upper and lower positions which spaces are defined by inserting the upper and lower squeeze-plates to the open ends, supplying molding sand through the sand-filling port to the two upper and lower molding spaces, and squeezing the molding sand in the two upper and lower molding spaces.

A device for moving a metal cope towards and apart from a stationary metal drag, used in a metal mold casting device that uses the metal cope and drag, comprising: an upper die plate (9) for carrying the metal cope; a frame (5; 25); a metal mold opening and closing device (6) mounted on the frame for carrying and vertically moving the upper die plate relative to the frame so as to move the metal cope attached to the upper die plate between a position that is above and relatively near the metal drag and a position that is at the metal drag; and an actuator (3; 23, 23) connected to the frame for moving the frame so as to move the metal cope attached to the upper die plate between the position that is above and relatively near the metal drag and a position that is relatively far from the metal drag.

The purpose of this invention is to provide a method for making upper and lower molds and an apparatus therefor that can prevent the resulting molds from being warped and match-plates from being broken.The method of this invention comprises the step of holding a match-plate 1 between cope and drag flasks 2 and 3, inserting upper and lower squeezing means 4 and 5 into the respective openings of the cope and drag flasks 2 and 3, which openings are opposite to the match-plate 1, so as to define upper and lower molding spaces, supplying molding sand to the upper and lower molding spaces, and then causing the upper and lower squeezing means 4 and 5 to move forward to the match-plate 1 so as to squeeze the molding sand and make upper and lower molds, wherein during the step of causing the upper and lower squeezing means to move forward to the match-plate the difference between the squeezing pressures of the upper and lower molding spaces is kept within a predetermined tolerance.

A gravity type tiltable metal mold casting machine, comprising: a pair of opposing upright supporting frames (2, 2); a pair of opposing main rotating shafts (3, 3) rotatably mounted on the upright supporting frames (2, 2); a main frame (4) suspended from and between the main rotating shafts (3, 3); an electric motor (19) attached to one of the main rotating shafts (3, 3) for reversibly rotating it and hence the frame (4); a drag die plate (6) vertically moved by mold-fastening cylinders (5, 5) mounted on a lower part of the main frame (4); a metal drag (10) secured to the drag die plate (6), the metal drag having a drag pushing-out mechanism (23) for pushing an as-cast product out of the metal drag; a pair of opposing horizontal cope tilting shafts (13, 13) secured to an upper end of the main frame at locations rearward of the main rotating shafts (3, 3); a cope-attaching frame (14) rotatably mounted at one end on the cope tilting shafts (13, 13); a cope die plate (16) secured to a lower surface of the cope-attaching frame (14); a metal cope (17) secured to the cope die plate (16), the metal cope having a cope pushing-out mechanism (26) for pushing an as-cast product out of the metal cope, a ladle (21) rotatably mounted about a horizontal axis of rotation, the horizontal axis of rotation being located rearward of the assembly of the metal cope and drag; and an electric motor (9) for reversibly rotating the ladle (21) about the horizontal axis of rotation, wherein the center of the assembly of the metal cope and drag is substantially on the axis of rotation of the main rotating shafts.

A core-setting apparatus and a method for setting the core in a lower mold used in a molding apparatus, wherein the core-setting apparatus has a simple structure and can maintain the core in the mold in a highly accurate position. The core-setting apparatus to set a core in the lower mold while the upper and the lower mold and a match plate are separated from each other after molding the upper and lower mold in a cope and drag flask includes a handling tool having a holding device and a rotatable rod, wherein the handling tool is rotatably supported by the rod, a carrier for transferring the handling tool, wherein the carrier supports the rotatable rod and is moved to or from a location above the lower mold, and an actuator for lowering and lifting the cope flask together with the carrier and the handling tool which are located above the drag flask, the actuator being mounted on the main body of the molding apparatus.

Disclosed is a molding method for separating a cope flask and a drag flask from a match plate at the same time. The method comprises the steps of: holding the match plate between the cope and drag flasks; inserting an upper squeeze member and a lower squeeze member into openings of the cope and drag flasks, which are opposed to the match plate, to define an upper molding space and a lower molding space, respectively; filling the defined molding space with molding sand; and driving the upper and lower squeeze members toward the match plate to squeeze the molding sand within the upper and lower molding space to mold an upper mold and a lower mold at the same time. The cope and drag flasks that are included within the molded upper and lower molds are forcibly pushed away from the match plate at the same time when the flasks are stationary.