DE202016008514U1 - caster - Google Patents

Abstract

Casting device (10) for low- or counter-pressure casting, wherein the casting device (10) has at least one lower chamber (3) for at least one furnace (4) and at least one upper chamber (5) for at least one mold and the lower chamber (3) from the upper chamber (5) by at least one lower platen (15) for fixing a lower part (22) of the at least one mold are separated from each other, wherein the lower platen (15) is arranged displaceable in a vertical direction, wherein the upper chamber ( 5) has an upper platen (12) for an upper part of the at least one mold, wherein the upper platen (12) is displaceably mounted in the vertical direction and connected to first connecting elements (17), wherein the lower platen (15) with second connecting elements ( 16), each of the first connection elements (17) being connected to a corresponding connection element of the second connection elements (16) is brought by a vertical displacement of the upper platen (12) in the direction of the lower platen (15) is engaged, wherein the upper platen (12) is connected to actuators (24) for raising or lowering the upper platen, wherein the Actuators (24) as piston / cylinder units, in particular as a hydraulic cylinder, are formed, characterized in that the piston (26) of the piston / cylinder units connected to the upper platen (12) and working cylinder (25) of the piston / cylinder units under the respective associated pistons (26) are arranged and supported.

Description

The invention relates to a casting device for low-pressure or counter-pressure casting, according to the preamble of claim 1.

Furthermore, the invention relates to a plant for the production of a workpiece by means of low-pressure or counter-pressure casting.

Installations with a casting apparatus, in particular for casting under a pressure generated by a gas phase, are used in foundry technology, in particular for the production of castings having high physical and mechanical characteristics, in particular of light metal alloys.

The actual casting process takes place both in the low-pressure casting process and in the counter-pressure Kokillengießverfahren using a riser, through which the melt is conveyed up into the mold.

However, the pressurization of the melt in the furnace to convey the melt up into the mold is brought about in the counterpressure die casting process by a pressure difference by slightly lowering the gas pressure in the mold. This creates an overpressure in the casting furnace, which is sufficient for the rise of the melt in the mold.

Casting devices of the type mentioned are from the DE 15 83 663 A1 and the JP H02 52160 A known. Other relevant casting machines are in the WO 2011/003396 A1 and the CN 103 962 528 A described.

A relevant casting apparatus and a system are, for example, from the DE102010026480A1 known. In the known solutions, the platen, by which the lower chamber is separated from the upper chamber, fixedly mounted and can not be changed in position. To connect the oven to the mold via a riser, the oven is raised after being positioned in the lower chamber. However, this has the disadvantage that, on the one hand, a very high mass has to be moved and, on the other hand, this process is relatively time-consuming for quickly exchanging a furnace for a new casting process. Another disadvantage is that in the known solutions two hoists or drives are required because both the furnace and the upper platen must be moved. Which also significantly increases the height.

It is therefore an object of the invention to overcome the above-mentioned disadvantages of the prior art.

This object is achieved with a device of the type mentioned according to the invention by the features of the characterizing part of claim 1.

Due to the vertical mobility of the lower platen this can be moved upwards, whereby the space available for manipulation of the furnace in the lower chamber is increased. In this way, the oven can be easily positioned in the chamber and removed again. Moreover, it is possible to connect the furnace positioned in the lower chamber to the mold without raising it vertically, by lowering the upper mold plate. It should be noted at this point that the lower and the upper chamber can each be hermetically, in particular gas-tight, sealed. Also, the upper and / or lower chamber may be evacuated or filled with a protective gas. In addition, the solution according to the invention saves the second drive for lifting the furnace, whereby the overall height can be significantly reduced.

The connection of the upper platen to actuators has the advantage that the upper platen can be moved both with respect to the lower platen and together with this. A movement of the upper platen independent of the lower platen is especially in a feed of the upper chamber with a mold advantage because it can be increased by lifting the upper platen of the available space for loading the upper chamber. Thus, a mold located in the chamber in a closed state (upper and lower part connected to each other) are lifted from the upper platen and loaded by means of a manipulator on a transport carriage. When loading the upper chamber, the upper platen can be connected to the upper part of the closed mold. By lowering the upper platen, the mold can be associated with the lower platen and be solved in case of need, the upper part of the lower part of the mold. A common movement of lower and upper platen is as already mentioned above, especially with regard to the loading of the lower chamber with an oven and its removal from there an advantage.

The inventive arrangement of the piston / cylinder units can a small height be realized because the pistons push the upper platen upwards. In another arrangement, the pistons would pull the platen up and the cylinders would have to be placed over the platen hanging, which would increase the height. Also, in this variant of the invention higher forces acting on the piston can be realized than in an arrangement in which the pistons pull the upper platen upwards, the case is because the force on the entire available cross-sectional area of the piston and not can only be exercised on an annular surface.

According to an advantageous variant of the invention, it may be provided that the at least one lower platen has at least one riser pipe for connecting the at least one furnace to the at least one mold. The arrangement of the riser to the lower platen has the advantage that the riser is lifted by lifting the lower platen, whereby the riser very quickly removed from the range of the furnace and the furnace can be replaced very quickly. In particular, it is advantageous in this case if a lower edge of the riser pipe is raised above an upper edge of the furnace, since the furnace can then be removed from the chamber or inserted into it in the horizontal direction without being impeded by the riser pipe. Alternatively, for mounting the riser to the lower platen, however, it would also be possible to move the riser separately from the platen.

In an advantageous embodiment of the invention, it may be provided that the upper chamber has an upper platen for an upper part of the at least one mold. The upper platen may have holding elements and optionally media interfaces for the upper part of the mold.

Particularly preferably, the upper platen is slidably mounted in the vertical direction and connected to first connecting elements, wherein the lower platen is connected to second connecting elements, wherein each of the first connecting elements with a corresponding connecting element of the second connecting elements by a vertical displacement of the upper platen in the direction of the lower Platen is brought into engagement. This variant of the invention has the advantage that the upper platen and the lower platen can be moved together. So can be mitaufhoben or lowered by a lifting or lowering the upper platen, the lower platen. This is advantageous, inter alia, with regard to reducing the drive elements required for the movement of the platens. In addition, can be synchronized in this way, the movements of the two platens with little effort, which is especially in a quick exchange of furnace and / or the mold disposed above advantage.

With regard to a reliable connection of the upper and lower platen, it is particularly advantageous if each of the first connecting elements with the respectively associated second connecting element forms a positive and / or non-positive closure. If necessary, the closures can be released again and, for example, the upper platen can be moved relative to the lower platen. It is particularly advantageous if one of the connecting elements engages in the associated other connecting element as soon as one of the two connecting elements is pushed into one another in the other connecting element or the two connecting elements. This allows a very quick and automatic connection of the lower and the upper mold clamping plate solely by a vertical displacement of the upper mold mounting plate.

According to a further advantageous embodiment, the casting apparatus may be a column casting apparatus having a frame with columns, which are arranged between a base plate and a cover structure of the casting device, wherein the cover structure has an x-shaped basic shape. Due to the special design of the cover structure thermally induced stresses can be broken down particularly well, without causing constraints, as can be the case with a plate-shaped design of the cover structure. In addition, the x-shaped cover structure allows a particularly good accessibility of the casting device from above.

The above object can also be achieved with a system of the type mentioned in the present invention by having at least one casting device according to one of claims 1 to 6.

To increase the productivity of the system, it may be provided that at least two casting devices are provided, which are arranged at a distance next to each other, wherein between the casting devices, a manipulator for handling workpieces is arranged. In addition, the manipulator can perform other process steps, such as inserting cores, application of sizing, cleaning of the mold and / or test procedures, for example by means of a camera. Furthermore, the system can at least one guide have, on which at least one transport carriage for transferring a furnace between a supply station and the at least one casting device is arranged.

Particularly advantageous in terms of production time is when the transport carriage has at least two floors arranged above one another, wherein a lower floor is provided for the transport of the furnace and an upper floor for a transport of at least one mold.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

• 1 eine perspektivische Ansicht einer erfindungsgemäßen Anlage;
• 2 eine Vorderansicht einer Gießstation der Vorrichtung aus 1;
• 3 eine Seitenansicht der Gießstation aus 2.

In each case, in a highly simplified, schematic representation:

• 1 a perspective view of a system according to the invention;
• 2 a front view of a casting station of the device 1 ;
• 3 a side view of the casting station 2 ,

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

In the 1 schematically illustrated attachment 1 for producing a workpiece by means of low-pressure or counter-pressure casting has a casting station 2 with two spaced juxtaposed casting devices 10 on. Such a casting station or such casting devices 10 are schematic in 2 and 3 shown. Each of the casting devices 10 has a lower, in particular hermetic, sealable chamber 3 and an upper, in particular hermetically, sealable chamber 5 on, which by a lower platen 15 are separated from each other. According to the invention, the mold clamping plate 15 displaceable in a vertical direction. For example, the mold mounting lath on a base of the casting apparatus 10 be slidably mounted in the vertical direction.

In the lower chamber 3 can a stove 4 be arranged with melt. In the upper chamber 5 can be arranged, for example, approximately horizontally divided mold, this one in 2 schematically indicated and there by the reference numeral 22 provided lower part, which on the lower platen 15 can be arranged, and an upper part, not shown, which on an upper platen 12 can be arranged may have. The upper platen 12 can interfaces 13 and 11 For example, have holders and media connections for the upper part of the mold, in particular for swinging the upper part for better accessibility by an operator. In the area of the lower platen 12 may, for example, a traction device called core pull 14 be provided for changing the position of a mold core.

The upper platen 12 is in the vertical direction, for example on a base frame of the casting apparatus 10 , slidably mounted and with in 3 with the reference numerals 17 marked, first connecting elements connected. The lower platen 15 is with in 3 with the reference numerals 16 provided, second connecting elements connected. Each of the first fasteners 17 can with a corresponding connecting element of the second connecting elements 16 by a vertical displacement of the upper platen 12 in the direction of the lower platen 15 be engaged. Each of the first fasteners 17 forms with the respectively associated second connecting element 16 each a positive and / or non-positive closure. The closure can, for example, electronically controlled, be unlocked again, so that the fasteners 16 and 17 can be solved again from each other. The closure may, for example, comprise an electronically controlled locking mechanism.

According to the in 3 illustrated embodiment is a second connecting element 6 as a pin and the associated first connecting element 17 trained as a castle. By lowering the upper platen 12 in the direction of the lower platen 15 snaps the pin in the lock, such as an electromechanical lock, and the upper platen 12 and the lower platen 15 are connected together so that the lower platen 15 by a movement of the upper platen 12 raised and lowered again.

The upper platen 12 can with actors 24 for raising or lowering the upper platen 12 be connected. The actors 24 are formed in the illustrated embodiment as a piston / cylinder units, in particular as a hydraulic cylinder. piston 26 The piston/ Cylinder units are here with the upper platen 12 connected. working cylinder 25 the piston / cylinder units are under the associated pistons 26 arranged and supported, for example on a frame of the casting apparatus 10 ,

According to 1 can the casting device 10 be designed as a column caster, which is a frame with columns 27 which is between a base plate 28 and a deck structure 19 the casting device 10 are arranged. The cover structure 19 has an x-shaped basic shape in the illustrated embodiment. A casting device with the in 1 shown cover plate is an optionally independent embodiment of a casting device, which also independent of the arrangement of a movable lower mold plate 15 and the other essential features of the subject invention.

The melted oven 4 and the mold cavity formed by the two mold parts in the closed state are according to 2 via a riser 23 connected to each other, which on the lower platen 15 can be mounted. The riser 23 follows in the illustrated embodiment, a movement of the lower platen 15 ,

Between the in 1 and 2 spaced apart two casting devices 10 can be a manipulator 21 be arranged for handling the workpieces.

Furthermore, a guide 28 be provided, which is realized in the illustrated example by a rail system on which a transport carriage 6 for receiving or removal and delivery or transfer of the furnace 4 is arranged.

The transport carriage 6 hereby oscillates between the casting devices 10 and a remote delivery position, e.g. a station 8th for the preparation of the melt.

In 3 is shown as the transport carriage in front of a casting device 10 stops around a furnace filled with melt 4 from his oven positioning position into the, not yet with an oven 4 provided pouring device 10 to convict. Previously, the transport carriage 6 this oven 4 Leaving a vacancy at the station 8th added. According to 1 has the transport carriage 6 another Ofenpositionierstelle 29 on. This is a time-saving change of an empty in the casting device 10 arranged furnace 4 against a furnace filled with melt 4 possible. The transport carriage 6 first take the oven filled with melt 4 in a first oven positioning station 20 from the station 8th then moves on to the casting device 10 to get the empty oven 4 in the second, still free Ofenpositionierstelle 29 then transfers the melted oven 4 from the first oven positioning station 20 in the ovenless pouring device 10 to finally pick up the empty oven already taken 4 to the station 8th take it with you, so that this in a vacancy of the station 8th can be transferred to the new charge with melt.

The transport carriage 6 may have two floors arranged above each other, with a lower floor for the transport of the furnace 4 and an upper floor 18 is provided for a transport of at least one mold. To accommodate the molds, the transport carriage 6 at a stage 9 stop and the molds provided there from the stage 9 transfer to the upper level. Then you can use the oven 4 and the mold loaded transport carriage to one of the casting devices 10 drive. Transferring the dies to and from the transport carriage 6 can by means of tool cart 7 respectively.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the device according to the invention, these or their components have been shown partly unevenly and / or enlarged and / or reduced in size.

LIST OF REFERENCE NUMBERS

1

investment

2

casting station

3

chamber

4

oven

5

chamber

6

transport carriage

7

tool trolley

8th

station

9

stage

10

caster

11

interface

12

platen

13

interface

14

hitch

15

platen

16

connecting member

17

connecting member

18

ground

19

deck structure

20

Ofenpositionierstelle

21

manipulator

22

lower part

23

riser

24

actuator

25

working cylinder

26

piston

27

columns

28

guide

29

Ofenpositionierstelle

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 1583663 A1 [0006]
• JP 2052160 H [0006]
• WO 2011003396 A1 [0006]
• CN 103962528 A [0006]
• DE 102010026480 A1 [0007]

Claims (8)

Casting device (10) for low- or counter-pressure casting, wherein the casting device (10) has at least one lower chamber (3) for at least one furnace (4) and at least one upper chamber (5) for at least one mold and the lower chamber (3) from the upper chamber (5) by at least one lower platen (15) for fixing a lower part (22) of the at least one mold are separated from each other, wherein the lower platen (15) is arranged displaceable in a vertical direction, wherein the upper chamber ( 5) has an upper platen (12) for an upper part of the at least one mold, wherein the upper platen (12) is mounted displaceably in the vertical direction and connected to first connecting elements (17), wherein the lower platen (15) with second connecting elements ( 16), each of the first connection elements (17) being connected to a corresponding connection element of the second connection elements (16) is brought by a vertical displacement of the upper platen (12) in the direction of the lower platen (15) is engaged, wherein the upper platen (12) is connected to actuators (24) for raising or lowering the upper platen, wherein the Actuators (24) as piston / cylinder units, in particular as a hydraulic cylinder, are formed, characterized in that the piston (26) of the piston / cylinder units connected to the upper platen (12) and working cylinder (25) of the piston / cylinder units under the respective associated pistons (26) are arranged and supported. Casting device after Claim 1 , characterized in that the at least one lower mold mounting plate (15) has at least one riser pipe (23) for connecting the at least one furnace (4) to the at least one mold. Casting device after Claim 2 , characterized in that each of the first connecting elements (17) with the respectively associated second connecting element (16) each form a positive and / or non-positive closure. Casting device according to one of Claims 1 to 3 characterized in that the pouring device (10) is a column pouring device comprising a frame with columns (27) arranged between a base plate (28) and a cover structure (19) of the pouring device (10), the cover structure (19 ) has an x-shaped basic shape. Plant (1) for producing a workpiece by means of low-pressure or counter-pressure casting, characterized in that it comprises at least one casting device (10) according to one of Claims 1 to 4 having. Plant after Claim 5 , characterized in that at least two casting devices (10) are provided, which are arranged at a distance next to each other, wherein between the casting devices (10) at least one manipulator (21) for handling workpieces is arranged. Plant according to one of the Claims 5 or 6 , characterized in that it comprises at least one guide on which at least one transport carriage (6) for transferring a furnace (4) between a supply station (8) and the at least one casting device (10) is arranged. Plant after Claim 7 , characterized in that the transport carriage (6) has at least two floors arranged above one another, wherein a lower floor is provided for the transport of the furnace (4) and an upper floor (18) for a transport of at least one mold.

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