Abstract
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.
Claims
1. A riser for metal casting, comprising: a riser body, wherein the riser body comprises a riser cavity for receiving liquid metal, wherein the riser body is configured to have multiple parts and comprises at least a first riser body part and a second riser body part, wherein the first and second riser body parts are connectable to each other, wherein the riser cavity is provided in the interior of the at least first and second riser body parts; wherein the riser body comprises an opening allowing liquid metal to flow into the riser cavity or out of the riser cavity respectively, and wherein the riser body is made of metal.
2. The riser according to claim 1, wherein the riser comprises a connecting element that is suitable to for directly or indirectly connecting the riser body to a casting piece or a mold plate, respectively.
3. The riser according to claim 2, wherein the connecting element is a tube-like body and is preferably made of a metal or a plastic material, wherein the connecting element has a thickness of 0.1 mm to 10 mm, and wherein, independently thereof, the connecting element has a length of 15 mm to 300 mm.
4. The riser according to claim 2, wherein the connecting element is designed to be retractable and is arranged to be movably supported on the riser body, and wherein the connecting element moves in relation to the riser body when compressing the molding material, in that the connecting element is at least partially retractable into the riser body (2).
5. The riser according to claim 2, wherein the connecting element comprises at least one stop and/or one thickening that is configured to prevent the connecting element from slipping into or out of the riser body.
6. The riser according to claim 1, wherein the riser body comprises a sheet metal.
7. The riser according to claim 6, wherein the sheet metal has a thickness of 0.1 mm to 1.2 mm.
8. The riser according to claim 1, wherein the riser body comprises a recess for a centering pin and/or spring pin; or wherein the riser comprises a lid that is arranged in an opening of the riser body, and wherein the lid has an opening for a centering pin or spring pin.
9. The riser according to claim 1, wherein the first and the second riser body part comprises connecting means for connecting the riser body parts to become the riser body.
10. The riser according to claim 1, wherein the riser body is horizontally or vertically divisible into at least two riser body parts.
11. The riser according to claim 1, wherein the first and the second riser body parts are at least substantially equally dimensioned.
12. The riser according to claim 1, wherein the riser body or the second riser body part or both, tapers in the direction of the opening of the riser body.
13. The riser according to claim 12, wherein the riser body or the second riser body part or both, tapers in stair-like steps or in folds such that the riser body or the riser body part can be deformed accordion-like when applying an external pressure.
14. The riser according to claim 1, wherein the riser cavity is formed by joining at least the first and the second riser body parts to result in a substantially horizontally or substantially vertically divisible riser body.
Description
(1) The present invention is further illustrated while reference is made to the following figures, wherein:
(2) FIG. 1 shows an exploded view of a riser according to the invention with a two-part, horizontally divided riser body part comprising a first and a second riser body part and a lid and a connecting element;
(3) FIG. 2 shows a side view of the riser according to FIG. 1, wherein the first riser body part, the second riser body part, the lid and the connecting element are in an assembled state;
(4) FIG. 3 shows a sectional view of a riser according to the invention as shown in FIG. 1 and FIG. 2;
(5) FIG. 4 shows a side view of the assembled riser according to FIG. 2 after compression of the molding material, with the connecting element inserted into the riser cavity;
(6) FIG. 5 shows a sectional view of a riser with a two-part riser body, the second riser body part tapering downwards and being accordion-stepped there;
(7) FIG. 6 shows a side view of the riser according to FIG. 5;
(8) FIG. 7 shows an exploded view of a riser according to the invention with a two-part, vertically divided riser body part comprising a first and a second riser body part;
(9) FIG. 8 shows a perspective side view of the riser according to FIG. 7.
(10) FIG. 1 shows an exploded view of a riser 1 according to the invention with a two-part riser body 2. The riser according to the invention has the configuration of a spherical riser. The two-part riser body 2 has a first riser body part 4 and a second riser body part 5. A recess for a lid 3 is arranged in the first riser body part 4, in which a recess for a centering pin is arranged (not shown). The second riser body part 5 has an opening that slidably receives the connecting element 6 and tapers in the direction of the mold plate (not shown). The riser body 2 is separable horizontally into approximately two riser body parts of equal size by the first riser body part 4 and the second riser body part 5. A connecting means 8 is arranged on the first riser body part 4 in the form of a track running around the first riser body part 4 with clamping elements (not shown), used to clamp or insert the first riser body part 4 into the second riser body part 5. The clamping elements form a connecting means 8, through which the first riser body part 4 and the second riser body part 5 can be connected to each other and brought into engagement. A thickening 7 is arranged at the lower end of the connecting element 6, which is suitable for preventing the connecting element 6 from being pushed into the riser cavity 9 (not shown) of the riser 1 according to the invention when the molding material is compressed.
(11) FIG. 2 shows a side view of the assembled riser 1 of FIG. 1. The lid 3 is inserted into the recess of the first riser body part 4. The lid 3 has a recess for a centering pin or for a spring pin (not shown). The first riser body part 4 and the second riser body part 5 together form the riser body 2. The riser body is assembled using the connecting means 8 (not shown) or the connecting means 8 engages into the upper edge of the second riser body part 5. The second riser body part 5 tapers in the direction of the mold plate (not shown). The connecting element 6 is slidably arranged in the opening of the second riser body part 5. The connecting element 6 is designed to connect the riser body 2 to the mold plate or the casting (not shown). The connecting element 6 contributes to the formation of a suitable breaking edge. The connecting element 6 can slide or slip into the riser cavity 9 (not shown) in the riser body 2 when compressing the molding material. The thickening 7, which is arranged at the lower end of the connecting element 6, prevents the connecting element 6 from completely sliding into the riser cavity 9 (not shown) of the riser body 2, for example when compressing the molded material.
(12) FIG. 3 shows a section across the riser according to FIG. 2. In the lid 3, which is arranged in a recess of the first riser body part 4, a recess for a centering pin or for a spring pin is to be seen. The connecting means 8, which is arranged on a circumferential path in the form of clamping elements on the first riser body part 4 (see FIG. 2), connects the first riser body part 4 to the second riser body part 5, such that these two riser body parts, which are approximately the same size and horizontally divided, form the riser body 2. The connecting element 6, which is arranged in a recess in the second riser body part 5, can slide into the riser cavity 9 when the molding material is compressed along the guide of the connecting element 10, thus forming a breaking edge between the finished casting and a riser residue. The thickening on the connecting element 7 prevents the connecting element 6 from completely falling into the riser cavity 9 when compressing the molding material.
(13) FIG. 4 shows a top view of an assembled riser 1 according to FIG. 2 and FIG. 3, but following compression of the molding material. Herein, the thickening of the connecting element 6 contacts the second riser body part 5 and prevents the connecting element 6 from completely sliding into the riser cavity 9 of the riser according to the invention, which is formed by the riser body 2.
(14) FIG. 5 and FIG. 6 show a sectional view (FIG. 5) and a side view (FIG. 6) across and onto a riser according to the invention according to another embodiment, respectively. In the lid 3, which is arranged in a recess of the first riser body part 4, an recess for a centering pin or for a spring pin can be seen (FIG. 5). The connecting means 8, which is arranged on a circumferential path in the form of clamping elements on the first riser body part 4 (equivalent to FIGS. 1 to 4; not shown), connects the first riser body part 4 to the second riser body part 5, such that these two riser body parts 4, 5, which are approximately the same size and horizontally divided, form the riser body 2. The first and second riser body parts 4, 5 have a half-shell shape. Both riser body parts 4, 5 have different designs. The first riser body part 4 has an opening for the lid 3. The opening through which liquid metal can flow into the riser cavity (not shown) or out of the riser cavity (not shown) is arranged in the second riser body part. The second riser body part 5 tapers in a stepped manner in the direction of the mold plate (not shown) and is designed in such that it can be retracted like an accordion when compressing the molding material (not shown) thereby forming a breaking edge between the final casting and the riser 1 according to the invention.
(15) FIG. 7 and FIG. 8 show an exploded view (FIG. 7) and a perspective side view (FIG. 8) of another riser body 1. This one has a first riser body part 4 and a second riser body part 5, which have approximately the same dimensions and are divided in a vertical direction. Both riser body parts 4, 5 have identical half-shell shapes. Both the first riser body part 4 and the second riser body part 5 each have a recess for a centering pin or for a spring pin at the upper end (i. e. the end facing away from the casting). Both the first and the second riser body part 4, 5 have connecting means 8 in the form of a crimped edge at least partially surrounding the two riser body parts 4, 5. The two riser body parts 4, 5 can be glued together using the connecting means 8. Furthermore, both riser body parts 4, 5 have an opening for a connecting element 6 (not shown), which is arranged opposite the recess for the centering pin. Inside the two riser body parts 4, 5, the riser cavity 9 is provided, which is used to accommodate liquid metal.
(16) TABLE-US-00001 List of reference numbers: 1. Riser 2. Riser body 3. Lid 4. First riser body part 5. Second riser body part 6. Connecting element 7. Thickening at connecting element 8. Connecting means 9. Riser cavity 10. Guide connecting element
