Vertically divided feeder for use in metal casting in casting molds and method for production thereof

Abstract

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′ ).

1 . A feeder insert for use in metal casting in casting molds, having a feeder body which delimits a feeder for receiving liquid metal, wherein
 the feeder body has a first end with a passage opening for the liquid metal and a second end opposite to the first end, and wherein   the feeder body comprises a central axis extending through the passage opening,   
       wherein
 the feeder body is separated at least one partition plane extending in a direction of the central axis and is formed from at least a first feeder shell and a second feeder shell, wherein the first and second feeder shells are connected to each other to form the feeder body, wherein the first and second feeder shells are substantially identically formed. 
 
     
     
         2 . The feeder insert according to  claim 1 , wherein the first feeder shell comprises a first partition surface and the second feeder shell comprises a second partition surface corresponding to the first partition surface for connecting the first and second feeder shells to each other. 
     
     
         3 . The feeder insert according to  claim 1 , wherein the first feeder shell comprises at least one first protrusion and at least one first recess and wherein the second feeder shell comprises at least one second protrusion and a second recess wherein the first protrusion engages in the second recess and the second protrusion engages in the first recess for connecting the first and second feeder shells. 
     
     
         4 . The feeder insert according to  claim 3 , wherein a spacing in a range of 20 mm or less, 15 mm or less, 10 mm or less, 5 mm or less, 3 mm or less is provided between adjacent protrusions and/or recesses. 
     
     
         5 . The feeder insert according to  claim 3 , wherein measured along the central axis in sum, a section of 50% or less, 40% or less, 35% or less, or 30% or less, is free of protrusions and recesses. 
     
     
         6 . The feeder insert according to  claim 3 , wherein the protrusions are formed by material appendages of residual material in inlet openings of a core box in which the feeder shell is manufactured. 
     
     
         7 . The feeder insert according to  claim 3 , comprising a holding sleeve partially or completely circumferentially surrounding the feeder body for holding the first and second feeder shells together. 
     
     
         8 . The feeder insert according to  claim 7 , wherein the holding sleeve is selected from: paper sleeve, plastic sleeve, elastomer sleeve, rubber sleeve, metal sleeve, holding sleeve formed from renewable raw materials, holding sleeve formed from a substantially residue-free combustible material. 
     
     
         9 . The feeder insert according to  claim 7 , wherein the feeder body comprises a circumferential recess for receiving the holding sleeve. 
     
     
         10 . The feeder insert according to  claim 1 , wherein the feeder cavity comprises at least one undercut. 
     
     
         11 . The feeder insert according to  claim 10 , wherein the feeder cavity is part-spherical. 
     
     
         12 . The feeder insert according to  claim 1 , wherein the first and second feeder shells are substantially free of undercuts. 
     
     
         13 . The feeder insert according to  claim 1 , wherein the feeder body tapers towards the passage opening and thereby defines a feeder neck. 
     
     
         14 . The feeder insert according to  claim 1 , wherein the feeder body comprises at least one circumferential weak section which divides the feeder body into a base portion having the passage opening and an along the central axis coaxial cap portion, so that the feeder body is breakable in the weak section, when a force is applied in the direction of the central axis, wherein the base portion and the cap portion are telescopically displaceable into one another section wise. 
     
     
         15 . The feeder insert according to  claim 1 , comprising a metallic attachment arranged on the feeder body around the passage opening and having a collar extending in the direction of the central axis. 
     
     
         16 . The feeder insert according to  claim 1 , wherein the feeder body comprises, on an inner side facing the feeder cavity and opposite the passage opening, a centering pin recess for receiving a centering pin tip. 
     
     
         17 . The feeder insert according to  claim 16 , wherein towards the feeder cavity the centering pin recess comprises an insertion chamfer. 
     
     
         18 . The feeder insert according to  claim 1 , wherein the feeder body at least section-wise comprises an exothermic heating mass. 
     
     
         19 . The feeder insert according to  claim 1 , wherein the feeder insert has a modulus in a range from about 0.5 cm to 9 cm, preferably from about 1.2 cm to 2.6 cm. 
     
     
         20 . The feeder insert according to  claim 1 , comprising a metallic attachment arranged on the feeder body surrounding the passage opening and connecting the first feeder shell and the second feeder shell to each other. 
     
     
         21 . The feeder insert according to  claim 20 , wherein the metallic attachment comprises at least one first latching element and the feeder body comprises at least one second latching element corresponding to the first latching element, such that the metallic attachment can be latched to the feeder body. 
     
     
         22 . The feeder insert according to  claim 20 , wherein the metallic attachment is fixed to the feeder body in the manner of a bayonet catch. 
     
     
         23 . The feeder insert according to  claim 1 , for use in metal casting in vertically separable casting molds, wherein the feeder body is adapted for positioning by means of a centering pin positionable along a centering axis, and
 wherein the feeder cavity is configured such that a predominant volume portion of the feeder cavity is positionable above the centering axis when the centering axis is arranged horizontally.   
     
     
         24 . The feeder insert according to  claim 1 , wherein the feeder body
 is formed of exothermic feeder material or comprises exothermic feeder material at least section-wise; or   is formed of insulating feeder material or comprises insulating feeder material at least section-wise; or   is formed of or includes a material selected from the group consisting of metals, plastics, paperboards, mixtures thereof, and composites thereof.