The present invention relates to a feeder system for metal casting. The feeder system comprises a feeder sleeve mounted on a tubular body. The feeder sleeve has a longitudinal axis and comprises a continuous sidewall that defines a cavity for receiving liquid metal during casting. The sidewall extends generally around the longitudinal axis and has a base adjacent the tubular body. The tubular body defines an open bore therethrough for connecting the cavity to the casting. A groove extends into the sidewall from the base to a first depth and the tubular body projects into the groove to a second depth and is held in position by retaining means. The second depth being less than the first depth so that upon application of a force in use the retaining means are overcome and the tubular body is pushed further into the groove.

A metal casting riser sleeve system includes a mold cavity and a vented riser sleeve. The vented riser sleeve includes a riser reservoir and a vent passage. The riser reservoir is fluidly connected to the mold cavity and configured to allow molten alloy to flow from the mold cavity to the vented riser sleeve to create a casting portion. The vent passage extends through a length of the vented riser sleeve to allow airflow from the mold cavity through the vent passage.

The invention relates to a feeder insert (1, 1, 1, 1, 100, 100) for use in metal casting in casting molds, comprising a feeder body (2, 2, 2, 2, 102, 102) which delimits a feeder cavity (4, 4, 4, 4, 104, 104) for receiving liquid metal, wherein the feeder body (2, 2, 2, 2, 102, 102) has a first end (6, 6, 6, 6, 106, 106) having a passage opening (8) for the liquid metal and a second end (10, 10, 10, 10, 110, 110) opposite the first end (6, 6, 6, 6, 106, 106), and wherein the feeder body (2, 2, 2, 2, 102, 102) comprises a central axis (Z) extending through the passage opening (8). The feeder body (2, 2, 2, 2, 102, 102) is separated at least one partition plane (E) extending in a direction of the central axis (Z) and is formed at least from a first feeder shell (18, 18, 18, 18, 118, 118) and a second feeder shell (20, 20, 20, 20, 120, 120). The first and second feeder shells (18, 18, 18, 18, 118, 118) are connected to each other to form the feeder body (2, 2, 2, 2, 102, 102).

A side frame may include a bolster opening configured to receive an outbound portion of a bolster. A center core may be used during the manufacture of the side frame to form the bolster opening. The center core may include first and second side walls configured to form the first and second side frame columns of the bolster opening. Additionally, each of the first side wall and second side wall may include one or more pin core holes each of which is configured to receive a pin core used in forming the fastening holes of the first and second side frame columns.

A method for manufacturing a shell mold for the production by lost-wax casting of bladed elements (1) of an aircraft turbine engine, including the following steps: creating an assembly (200) including a wax pattern (100) as well as a device for forming a cup for pouring metal (32b) and having an end surface (40a); depositing a hot wax coating layer on at least one portion of the end surface (40a); forming the shell mold around the assembly (200). In addition, the method includes, between steps b) and c), the implementation of a step of structuring the coating layer intended for reinforcing the adhesion between the layer (46) and the shell mold, and including the production of recesses (62) and projections (60) on the still-malleable coating layer.

The invention relates to a molding riser for casting metals, wherein the riser has a metal riser body. The invention also relates to the use of the riser for casting metals into separable casting molds, in particular horizontally separable casting molds.

The invention relates to a feeder insert (1, 1, 1, 1, 100, 100) for use in metal casting in casting molds, comprising a feeder body (2, 2, 2, 2, 102, 102) which delimits a feeder cavity (4, 4, 4, 4, 104, 104) for receiving liquid metal, wherein the feeder body (2, 2, 2, 2, 102, 102) has a first end (6, 6, 6, 6, 106, 106) having a passage opening (8) for the liquid metal and a second end (10, 10, 10, 10, 110, 110) opposite the first end (6, 6, 6, 6, 106, 106), and wherein the feeder body (2, 2, 2, 2, 102, 102) comprises a central axis (Z) extending through the passage opening (8). The feeder body (2, 2, 2, 2, 102, 102) is separated at least one partition plane (E) extending in a direction of the central axis (Z) and is formed at least from a first feeder shell (18, 18, 18, 18, 118, 118) and a second feeder shell (20, 20, 20, 20, 120, 120). The first and second feeder shells (18, 18, 18, 18, 118, 118) are connected to each other to form the feeder body (2, 2, 2, 2, 102, 102).

The present invention relates to the use of closed-pore microspheres of expanded perlite as a filler for producing moldings for the foundry industry, to a composition for producing moldings for the foundry industry, comprising closed-pore microspheres of expanded perlite as a filler, and a binder, the binder being selected from the group consisting of water glass, phenol-formaldehyde resins, two-component systems comprising as reactants a polyisocyanate and a polyol component containing free hydroxyl groups (OH groups), and starch, and also to moldings for the foundry industry and to a process for producing a molding for the foundry industry.

A breaker core for use in a casting process includes a disk-shaped breaker core (10) having breaker core body and a through-opening (11) for liquid metal. A ring-shaped frame (12) made from a heat-resistant material is secured to the breaker core (10) and has a netlike webbing (15) tensioned therein. The netlike webbing (15) is made from a fire-proof material and spans the through-opening (11) of the breaker core (10) on an underside of a feeder. The frame (17) is secured with an outer sidewall (17) to the body of the disk-shaped breaker core (10). A plane of the netlike webbing (15) tensioned in the frame (12) is secured with a stepped offset to an upper end of the sidewall (17) facing the feeder, so that the netlike webbing (15) is placed in an area of an underside of the breaker core (10) facing the casting model.

A method of improving riser feedability in semi-permanent mold casting is disclosed. The method includes providing a first receptacle fluidly connected to a mold cavity and providing a second receptacle fluidly connected to a riser. Further, the method includes delivering molten metal to the first receptacle and conveying the molten metal into the mold cavity through a sprue. Delivery of molten metal to the first receptacle is terminated when the mold cavity reaches a predetermined fill level delivery of molten metal to the second receptacle is initiated. In certain embodiments, the first receptacle and the second receptacle are combined into a single receptacle and the sprue is connected to the mold cavity through a lower runner and is connected to the riser through an upper runner.