Feeder with netlike webbing spanning its feeder opening

Abstract

A feeder (10) for use in a casting mold includes a feeder body (11) made from an exothermic and/or insulating material. The feeder body has a bottom surface (15) with a feeder opening (16) for connection of the inner cavity (12) of the feeder body (1) with the mold cavity of the casting mold during a casting process. A ring-shaped frame (17) made of a heat-resistant material is secured to the feeder body (11). A netlike webbing (18) made from a fire-resistant material is tensioned within the ring-shaped frame (17). The frame (17) is arranged on the surface (15) of the feeder body (11), such that the netlike webbing (18) is positioned with the feeder (10) formed in the casting mold directly on a surface of a casting piece to be formed during casting.

Claims

1. A feeder (10) in the form of a feeder body for use in a casting mold used for casting metals, comprising: a feeder body (11) made from an exothermic and/or insulating material, the feeder body surrounding an inner cavity (12) as a feeder volume, the feeder body having a bottom surface (15) facing a mold cavity formed in the casting mold, the bottom surface (15) having a feeder opening (16) for connection of the inner cavity (12) of the feeder body (11) with the mold cavity of the casting mold during a casting process; a ring-shaped frame (17) comprising a heat-resistant material secured to the feeder body (11); a netted webbing (18) comprising a fire-resistant material and spanning the ring-shaped frame (17) in a tensioned manner, the netted webbing (18) spanning the feeder opening (16) of the feeder body (11), wherein the netted webbing (18) has a through-hole (23), wherein said through-hole (23) is smaller than the feeder opening (16) of the feeder (10), and wherein the frame (17) is secured on the bottom surface (15) of the feeder body (11), such that the netted webbing (18) is positioned with the feeder (10) formed in the casting mold directly on a surface of a casting piece to be formed during casting.

2. The feeder (10) according to claim 1, wherein the frame (17) comprises two frame parts (19, 20) positioned against one another and receive the netted webbing (18) therebetween, wherein the frame parts are securable to one another after application of a required tensioning force on the netted webbing (18).

3. The feeder (10) according to claim 2, wherein the frame parts (19, 20) are secured to one another via welding.

4. The feeder (10) according to claim 3, wherein the frame parts (19, 20) are secured to one another via spot welding.

5. The feeder (10) according to claim 1, wherein a width of the frame (17) corresponds to a material thickness of the feeder body (11) on the bottom surface (15).

6. The feeder (10) according to claim 1, wherein the frame (17) projects outwardly at least in one area over a periphery of the feeder body (11), wherein the at least one area the frame (17) that projects over said periphery of the feeder body (11) is bent up when the frame is positioned on the bottom surface (15) until contacting an outer periphery of the feeder body (11), so that the at least one area of the frame (17) that is bent up fixedly clamps onto the feeder body (11).

7. The feeder (10) according to claim 6, wherein the frame (17) has a plurality of tongues (22) configured to be bent upwardly, wherein said tongues are positioned about a circumference of the frame (17), wherein said tongues (22) are configured for attachment of the frame (17) to the feeder body (11).

8. The feeder (10) according to claim 1, wherein the frame (17) is clamped with the bottom surface (15) of the feeder body (11).

9. The feeder (10) according to claim 1, wherein the frame (17) is made from metal.

10. The feeder (10) according to claim 9, wherein an underside of the frame (17) that faces toward the mold cavity of the casting mold is provided with a fire-resistant coating.

11. The feeder (10) according to claim 1, wherein the frame is made of a ceramic material.

12. The feeder (10) according to claim 1, wherein the frame (17) is made from a fire-resistant material.

13. The feeder (10) according to claim 1, wherein the through-hole (23) has a surface of 10% to 50% of the surface of the netted webbing (18) enclosed by the frame (17).

14. The feeder (10) according to claim 1, wherein a width of a net opening in the netted webbing (18) is 1 mm to 20 mm, wherein the netted webbing (18) is formed of fibers, each of said fibers having a width of 1 mm to 15 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) An exemplary embodiment of the present invention is shown in the drawings and will be described in greater detail below. In the figures:

(2) FIG. 1 shows a feeder with a frame attached to its underside with a netlike webbing tension thereon in a schematic cross section;

(3) FIG. 2 shows the frame according to FIG. 1 in a detailed representation before attachment to the feeder body;

(4) FIG. 3 shows the frame according to FIG. 2 in a plan view;

(5) FIG. 4 shows the frame according to FIG. 2 attached to the feeder body without representation of the associated feeder body; and

(6) FIG. 5 shows the frame according to FIG. 4 in a plan view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(7) The feeder 10 shown in FIG. 1 has a feeder body 11, which includes a wall region 13 surrounding an inner cavity 12 as a so-called feeder volume and an upper cover region 14. A lower bottom surface 15 is disposed opposite to the cover region 14; a feeder opening 16 is formed in the lower bottom surface 15. In the feeder formed in the casting mold, the feeder opening 16 forms the connection between the inner cavity 12 of the feeder body and the mold cavity formed in the casting mold, so that during the casting process, the liquid metal introduced into the mold cavity through the feeder opening 16 enters into the inner cavity and if necessary, can flow back in the manner of a feeding again into the mold cavity.

(8) A frame 17 is mounted to the lower bottom surface 15 of the feeder 10, which holds a netlike webbing, which spans the feeder opening 16 of the feeder formed in the lower bottom surface 15.

(9) The frame 17 comprises two frame parts, specifically, an upper frame part 19 facing the feeder body 11 and a lower frame part 20, facing away from the feeder body 11, whereby the two frame parts 19, 20 retain the netlike webbing 18 between them. After application of the required tensioning of the netlike webbing 18, the two frame parts 19, 20 are fixed to one another, preferably welded with one another. In this manner, a stabile component exists, which can be safely manipulated during manufacture of the feeder.

(10) As shown in FIGS. 2 through 4, the frame 17, which corresponds in its width to the material thickness of the feeder body 11 on its bottom surface, has a plurality of tongues 22 distributed along its circumference and projecting over the circumference or periphery of the feeder body 11, whereby with the embodiment shown, the tongues 22 are formed only on the upper frame part 19. After the frame 17 is placed on the lower bottom surface 15 of the feeder body 11, the tongues 22 are bent up, until they are moved into a clamping position on the outer circumference of the feeder body 11 and in this manner, the frame 17 is secured to the feeder body 11.

(11) FIGS. 3 and 5 show that the netlike webbing 18 has a through hole 23 in its center for reducing flow resistance, the through-hole 23 being dimensioned to be smaller than the feeder opening 16 of the feeder 10. In addition, the points 21 arranged in the region of the tongues 22 can be seen, at which the two frame parts 19, 20, after placement and tensioning of the netlike webbing 18, are spot-welded.

(12) The features of the subject matter of this invention set forth in the above description, the patent claims, the abstract and the drawings can be used individually and in any desired combination for the realization of the invention in its various embodiments.

(13) The specification incorporates by reference the disclosure of DE 20 2015 104 554.9, filed Aug. 27, 2015.

(14) The present invention is, of course, in no way restricted to the specific disclosure of the specification and drawings, but also encompasses any modifications within the scope of the appended claims.