CASTING DEVICE AND DIECASTING METHOD

Abstract

A casting device and a diecasting method, preferably a vacuum die-casting method, includes a casting chamber having a filling opening, and a casting piston that can be moved in the casting chamber and is connected with a casting drive by way of a casting piston rod. The device also includes a feed line, by way of which casting material can be filled into the casting chamber through the filling opening. The casting chamber is disposed, at least in part, in a sleeve that is mounted so as to rotate.

Claims

1: Casting apparatus (10), particularly for a die-casting method, preferably for a vacuum die-casting method, comprising a casting chamber (18) having a filling opening (16)r a casting piston (24) that can be moved in the casting chamber (18), which piston is connected with a casting drive, by way of a casting piston rod (26), and having a feed line (20), by way of which casting material can be filled into the casting chamber (18) through the filling opening (16), wherein the casting chamber (18) is disposed, at least in part, in a sleeve (14) that is mounted so as to rotate.

2: Casting apparatus (10), according to claim 1, wherein the sleeve (14) has an opening (12), wherein this opening (12) can be positioned over the filling opening (16) of the casting chamber (18), at least in part, by means of a rotation of the sleeve (14).

3: Casting apparatus (10), according to claim 1, wherein the sleeve (14) can be rotated about the longitudinal axis of the casting chamber (18) by means of a rotation apparatus (22).

4: Casting apparatus (10), according to claim 1, wherein the sleeve (14) and/or the feed line (20) is/are configured in such at manner that they stand in an active connection with one another.

5: Casting apparatus (10), according to claim 4, wherein the active connection is such that when the sleeve (14) is rotated, both the sleeve (14) and the feed line (20) can be moved out of a and/or into the filling position, preferably in such a. manner that the feed line (20) can be mechanically lifted out of the opening (12) or filling opening (16) or lowered into the opening (12) or filling opening (16), at least in part, when the sleeve (14) is rotated.

6: Casting apparatus (10), according to claim 1, wherein the sleeve (14) has an exhaust opening (34).

7: Casting apparatus (10), according to claim 6, wherein the exhaust opening (34) is disposed on the sleeve (14) in such a manner that, the opening can be positioned above the filling opening (16) of the casting chamber (18), at least in part, by means of a rotation of the sleeve (14).

8: Casting apparatus (10), according to claim 1, wherein the sleeve (14) has a lifting element.

9: Casting apparatus (10), according to claim 1, wherein the casting piston rod (26) is disposed, at least in part, in a closure element (28) that is ring-shaped, to the greatest possible extent, which element (28) is mounted so as to be displaceable along the longitudinal axis of the casting chamber (18).

10: Casting apparatus (10), according to claim 9, wherein the closure element (28) can be disposed on the back side of the casting chamber (18) by means of a pushing apparatus (32).

11: Casting apparatus (10), according to claim 9, wherein the closure element (28) has an exhaust apparatus.

12: Die-casting method, particularly vacuum die-casting method, comprising the following method steps: a) moving a sleeve (14) to a filling position, b) positioning a feed line (20) above a filling opening (14, 16), c) introducing a casting material into a casting chamber (18), d) moving the feed line (20), e) rotating the sleeve (14) about a longitudinal axis of the casting chamber (18), into a casting position, f) introducing the casting material into a casting mold by means of a casting piston (24).

13: Die-casting method, according to claim 12, wherein moving the sleeve (14) into the filling position takes place in such a manner that an opening (12) of the sleeve (14) is positioned above a filling opening (16) of a casting chamber (18), at least in part.

14: Die-casting method, according to claim 12, wherein after rotation of the sleeve (14) into the casting position and before the casting piston (24) introduces the casting material into the casting mold, the casting chamber (18) is evacuated, at least in part, by way of an exhaust opening (34) disposed in the sleeve (14).

15: Die-casting method, according to claim 12, wherein a closure element (28) is positioned at a back side of the casting chamber (18) before, while or after the sleeve (14) is moved into the casting position.

16: Die-casting method, according to claim 15, wherein a space that is spanned by the back side of the casting chamber (18), the surface of a casting piston rod (26), and the inside of the closure element (28), is evacuated, at least in part, after the closure element is moved to the back side of the casting chamber (18) and before the casting piston (24) introduces the casting material into the casting mold, by way of an exhaust opening (30).

17: Die-casting method, according to claim 12, wherein after the casting chamber (18) has been filled with casting material, the feed line (20) is moved simultaneously with the rotation of the sleeve (14), by means of a lifting apparatus that is disposed on the sleeve (14).

18: Die-casting method, according to claim 12, wherein the feed line (20) is automatically positioned above the filling opening (12, 16) with the rotation of the sleeve (14) from the casting position into the filling position.

Description

[0065] Further developments and advantageous embodiments of the invention can be evident from the following descriptions of exemplary embodiments according to the invention, which are shown in the drawing. The figures show:

[0066] FIG. 1 a casting apparatus according to the invention in a filling position,

[0067] FIG. 2 a casting apparatus according to the invention in a pre-casting position,

[0068] FIG. 3 a casting apparatus according to the invention in a casting position,

[0069] FIG. 4 a casting apparatus according to the invention having an exhaust opening disposed on the sleeve, which opening is situated in a state of the sleeve between the filling position and the casting position, and

[0070] FIG. 5 a casting apparatus according to the invention in a post-casting position.

[0071] When the same reference numbers are used in FIG. 1 to 5, these refer to the same parts, so that for the purpose of avoiding repetition, a component that has already been described does not have to be discussed again in every figure description.

[0072] FIG. 1 shows a casting apparatus 10 according to the invention In the filling position. In this position, the filling opening 12 of the sleeve 14 is disposed above the filling opening 16 of the casting chamber 18, at least in part. A feed line 20, particularly a casting channel, is disposed above or in the filling openings 12, 16, which cover one another, at least in part, in such a manner that the casting chamber 18 can be filled with casting material. A hydraulic rotation apparatus 22 is disposed on the side of the sleeve, which apparatus makes It possible to rotate the sleeve 14 about the longitudinal axis of the casting chamber 18, In the filling state, the casting piston 24 and the casting piston rod 26 are disposed outside of the casting chamber 13, to the greatest possible extent. In the back space of the casting chamber 18, a closure element 28, which is tube-shaped, to the greatest possible extent, is disposed around the casting piston rod 26. The closure element 28 has an exhaust opening 30, by way of which the space that is configured by the back side of the casting chamber 18, the inside of the closure element 28, and the surface of the casting piston 26 can be evacuated. In this regard, the closure element 28 is mounted so that it can be displaced along the longitudinal axis of the casting chamber 18. Displacement of the closure element along the longitudinal axis of the casting chamber 18 takes place by means of a hydraulic pushing apparatus 32.

[0073] FIG. 2 shows the casting apparatus 10 according to the invention in a pre-casting position. In this position, in comparison with FIG. 1, the closure element 28 has moved to the back side of the casting chamber 18 by means of the hydraulic pushing apparatus 32. In this regard, the closure element 28 covers the casting piston 24 completely, without the casting piston 24 already being moved into the casting chamber 18. In this state, evacuation of the space spanned by the back side of the casting chamber 18, the surface of the casting piston 24 or the casting piston rod 26, and the inside of the closure element 28, by way of the exhaust opening 30, already begins.

[0074] FIG. 3 shows the casting apparatus 10 according to the invention in a casting position. In this state, in comparison with FIG. 2, the closure element 28 has been moved to the back side of the casting chamber 18 by means of the hydraulic pushing element 32, and the sleeve 14 has been brought, into a casting position by means of the hydraulic rotation apparatus 22. In this casting position of the sleeve 14, the sleeve 14 is rotated, about the longitudinal axis of the casting chamber 18 in such a manner that the filling opening 12 of the sleeve 14 is no longer disposed to cover the filling opening 16 of the casting chamber 18, and thereby the wall of the sleeve 14 closes off completely the filling opening 16 of the casting chamber 18. Furthermore, the feed line 20, particularly the casting channel, has been moved out of the filling openings 12, 16, which were previously disposed to cover one another, at least in part, in such a manner that rotation of the sleeve 14 about the longitudinal axis of the casting chamber 18 is made possible. The exhaust opening 34 (not visible) of the sleeve is disposed above the filling opening 16 of the casting chamber 18, at least in part, by means of the rotation of the sleeve 14 about the longitudinal axis of the casting chamber 18.

[0075] FIG. 4 shows the casting apparatus 10 according to the invention in a casting position from the view of the viewing direction B (see FIG. 3). From this viewing direction B, the exhaust opening 34 of the sleeve 14, which opening is disposed above the filling opening 16 of the casting chamber 18, at least in part, can be seen.

[0076] FIG. 5 shows a casting apparatus 10 according to the invention in a post-casting position. In this state, in comparison with FIG. 3, the actual casting procedure has been completed and the casting material is introduced into the casting mold by means of the casting piston 24, which was driven by way of the casting piston rod 26.

REFERENCE SYMBOL LIST

[0077] (is part of the Specification) [0078] 10 casting apparatus [0079] 12 filling opening of the sleeve [0080] 14 sleeve [0081] 16 filling opening of the casting chamber [0082] 18 casting chamber [0083] 20 feed line [0084] 22 rotation apparatus [0085] 24 casting piston [0086] 26 casting piston rod [0087] 28 closure element [0088] 30 exhaust opening of the closure element [0089] 32 pushing apparatus [0090] 34 exhaust opening of the sleeve [0091] B viewing direction