CN108348994B

CN108348994B - Vertical press and casting machine for casting machines

Info

Publication number: CN108348994B
Application number: CN201680064352.0A
Authority: CN
Inventors: C·霍耶; L·哈特曼
Original assignee: Kurtz GmbH
Current assignee: Kurtz GmbH
Priority date: 2015-11-09
Filing date: 2016-11-08
Publication date: 2020-03-03
Anticipated expiration: 2036-11-08
Also published as: CN108348994A; EP3374105B1; DE102015119243A1; RU2699477C1; WO2017081026A1; EP3374105A1

Abstract

The present invention relates to a press for a casting machine and to a casting machine having such a press. The press comprises a base plate, an upper frame and a movable mounting plate, wherein in the corner areas of the plates and of the upper frame two front and two rear struts are arranged, which extend through corresponding through holes in the movable mounting plate and are fixed to the base plate and to the fixed upper frame. The press is characterized in that the front struts are movably arranged in the base plate, the upper frame and the movable mounting plate such that they can be at least partially removed from the area between the base plate and the movable mounting plate. This makes it possible to insert and remove a mold having an arbitrary width or length into and from the area between the base plate and the movable mounting plate.

Description

Vertical press and casting machine for casting machines

Technical Field

The present invention relates to a vertical press for a casting machine and to a casting machine, in particular a low-pressure casting machine comprising such a vertical press.

Background

A vertical press, typically used in a casting machine, has a fixed base plate, a fixed upper frame and a movable mounting plate interposed therebetween. The base plate, upper frame and mounting plate are fixed or guided at each of its four corner regions by vertically disposed struts. During operation, a mold is arranged between the base plate and the mounting plate, wherein a lower mold half of the mold is fixed to the base plate and an upper mold part is connected to the mounting plate. In order to produce different molded articles, different molds are arranged in the press. The maximum width of the die is smaller than the distance between the two front pillars so that the die can be inserted into the press and removed again.

The press is designed for a predetermined pressure corresponding to the cavity volume in the mould. Practical experience has shown that there are also mainly elongate mould parts with a relatively small volume. The length or width of the mold is not suitable for passing through the front pillars. Although the printing capacity of the press is sufficient to handle such a die, such a die cannot be used in such a press.

DE2605394a1 discloses an injection molding machine with a horizontal press. The injection molding machine has at least one horizontally extending column that can be pulled out. A fixed mould carrier plate and a movable mould support plate are provided, between which the mould halves of the mould can be arranged and pressed together. Clamping sleeves are mounted in the movable mould carrier plate and in the stationary mould carrier plate, through which clamping sleeves each strut extends. The clamping sleeve is hydraulically actuated and can clamp the strut in the respective carrier plate. By alternately operating the clamping sleeves, the struts can be moved and removed from the region between the stationary and the movable mould carrier plate, so that the mould halves can be easily replaced.

EP404288a2 discloses a similar tie rod traction device for an injection molding machine, having a movable plate on which a fastening means in the form of a hydraulic clamp is arranged, by means of which the horizontal strut is clamped, and two fixed plates. The column can be moved in the horizontal direction by a reciprocating movement of the movable plate and a corresponding actuation of the hydraulic clamp.

DE102005029060B3 discloses a press for deburring and/or punching workpieces. The press has only three posts. It is designed with a rotating tool holder that can rotate around one of the posts, making it easy to replace larger tools.

DE202012001185U1 relates to a die set for the construction of forming dies and punching tools, wherein a support column can be mounted in a positionally displaceable manner along a T-shaped groove.

Disclosure of Invention

The object of the invention is to provide a vertical press for a casting machine and a corresponding casting machine, with which the printing or stamping capacity of the press can be optimally used.

This object is solved by the subject matter of the independent claims. Advantageous embodiments are specified in the respective dependent claims.

The press for a casting machine of the invention comprises a fixed base plate, a fixed upper frame and a movable mounting plate, wherein in the corner regions of the plate and of the upper frame there are placed two front uprights and two rear uprights coupled to the movable mounting plate by means of guides and fixed to the base plate and to the fixed upper frame. The press is a vertical press, which means that the posts are arranged vertically.

The press is characterized in that the front posts are releasably fixed in the base plate and the upper frame and movably arranged with respect to the base plate, the upper frame and the mounting plate such that they can be at least partially removed from the area between the base plate and the movable mounting plate.

This makes it possible to insert or remove a mold longer or wider than the distance between the front pillars in the region between the base plate and the movable mounting plate. The punching capacity of the press can thus be optimally utilized. In such conventional vertical presses with a horizontal base plate, the press must be used with a long mold, with the front posts correspondingly widely spaced from each other. Such presses typically have a stamping capacity that is much greater than that required to stamp the corresponding die.

The guide for guiding the mounting plate of the stanchion may be a through hole in the mounting plate. However, they can also be designed as guide elements arranged outside the mounting plate. Such a guide may comprise a plurality of rollers rotatably mounted on bearings fixed to the mounting plate and abutting the stanchions such that the mounting plate may be rolled over the stanchions by means of the rollers.

Preferably, the elevating mechanism is disposed on the upper frame to which the movable mounting plate is coupled such that the movable mounting plate can be vertically moved.

The movable mounting plate preferably has fixing means by means of which it can be releasably fixed to the front pillar. This makes it possible to: with the movement of the mounting plate, the front pillar can be driven and thus the vertical position of the front pillar can be changed. The retainers are typically snap-fit portions formed on the mounting plate that surround the front posts.

However, a separate lifting device may also be arranged for raising and lowering the front pillars at the upper frame. Such lifting means may comprise one or more hydraulic, pneumatic or spindle drives. By means of such an independent lifting device, the front pillars can be raised and lowered very quickly.

Fixing means for fixing the base plate and/or the upper frame to the front pillars are provided on the base plate and/or the upper frame, respectively. These fixing means can be designed as snap connections. These fixing means can also be designed as locking elements, for example with locking slides which retract into corresponding recesses of the respective front pillars to fix them to the base plate or the upper frame.

Preferably, the clamping mechanism is disposed between the upper frame and the base plate adjacent the rear strut and distal the front strut. The clamping mechanism is thus arranged outside the area spanned by the movable mounting plate. With the clamping mechanism, tension can be generated together with the raised front pillar, which compensates for the inclination of the upper frame with respect to the base plate. This ensures that the upper frame remains parallel to the substrate. The inclination of the upper frame with respect to the base plate will have the following disadvantages: the upper frames will tilt relative to the front pillars and they will therefore no longer be movable.

The clamping mechanism may comprise at least one hydraulic or pneumatic cylinder or spindle drive.

The rear pillar may extend slightly beyond the upper frame and reinforcement means may be formed between a section of the upper frame remote from the rear pillar and a rear pillar section projecting upwards at the upper frame. Thus, the arrangement of the upper frame with respect to the rear pillars is reinforced. This compensates for the inclination of the upper frame with respect to the base plate. The reinforcing means may be provided as an alternative to or in combination with the clamping mechanism described above.

Preferably, the movable mounting plate is formed by a mounting frame and a pivoting plate pivotably mounted to the mounting frame. A pivot joint between the mounting frame and the pivot plate is disposed in an area adjacent the front pillar such that the pivot plate can pivot downward and forward relative to the mounting frame. Thus, the mould halves of the mould attached to the pivot plate can be pivoted in the press such that the mould surfaces defined by the mould halves are easily accessible and can thus be easily cleaned.

The casting machine according to the invention has the above-described press, wherein the area between the base plate and the movable mounting plate is designed to accommodate a mould. The casting machine is preferably a low pressure casting machine.

The press according to the invention has been contemplated and developed for use in casting machines. However, such a press may also be used for other applications, where the object to be punched will be arranged between two press plates (here a base plate and a movable mounting plate) having a dimension larger than the distance between the two front pillars.

The base plate and the mounting plate can also be designed as frame-like elements. It is important that they are designed such that the object located therebetween can withstand the desired stamping force. Whether the stamping force is transferred in points or layers depends on the respective application.

Drawings

The invention will be explained in more detail by way of example with reference to the accompanying drawings. The figures show schematically and in simplified form:

FIG. 1 is a perspective view of a first embodiment of a casting machine;

FIG. 2 is a perspective view of a second embodiment of the caster; and

FIG. 3 is a block diagram of a typical setup of multiple casters.

Detailed Description

The casting machine 15 according to the present invention has a base plate 1 arranged horizontally, an upper frame 2, and a movable mounting plate 3 arranged between the base plate 1 and the upper frame 2. At the corner areas of the plates 1, 3 and the upper frame 2, two front pillars 4 and two rear pillars 5 are provided, which extend substantially from the base plate 1 to the upper frame 2 and keep them at a distance. The base plate 1, the upper frame 2 and the movable mounting plate 3 are arranged parallel to each other and form a press.

The press is a vertical press, i.e. the columns 4, 5 are arranged vertically.

The struts 4, 5 extend through corresponding through holes in the movable mounting plate 3 and serve to guide the movable mounting plate 3 such that the movable mounting plate 3 is always arranged parallel to the base plate 1 and the upper frame 2. The channels in the movable mounting plate 3 form guides for guiding the stanchions 4, 5 relative to the mounting plate 3.

The base plate 2 and the movable mounting plate 3 are formed as plate-shaped elements. However, they can also be designed as frame-shaped carriers. In the embodiment shown in fig. 1, the upper frame 2 is formed as a frame-shaped carrier. However, the upper frame 2 may also be formed as a plate-shaped element.

The lifting mechanism 6 is disposed on the upper frame 2. The lifting mechanism is in this embodiment a hydraulic cylinder. The lifting mechanism 6 is coupled to the lifting rod 7 to the movable mounting plate 3 and can be adjusted in its vertical position. It is also desirable to provide a plurality of lifting mechanisms for moving the movable mounting plate 3 in advance. In the present embodiment, the lifting mechanism 6 is arranged centrally on the upper frame 2. If a plurality of lifting mechanisms are provided, these can be arranged on the edge region of the upper frame 2.

The front pillars 4 are designed to be vertically movable. They extend through passages in the movable mounting plate 3 and the upper frame 2 and their lower ends are releasably secured to the base plate 1. For this purpose, the base plate has a recess 16, which recess 16 can accommodate the lower end section of the front pillar 4 in a positively locking manner. In the base plate 1 locking means (not shown) are provided, which have sliding portions that can be inserted into corresponding recesses of the respective front pillars 4 to lock the front pillars to the base plate 1.

On the mounting plate 3 and the upper frame 2, adjacent to the through-holes of the front pillars 4, respectively, there are arranged clasping portions 9, 17 that surround the front pillars 4. With these clasps 9, 17, the movable mounting plate 3 and the upper frame 2 can be fixed to the front pillars 4. Therefore, these fastening portions 9, 17 constitute fixing means for fixing the front pillars 4 relatively to the movable mounting plate 3 and the upper frame 2, respectively.

A clamping mechanism 10 is provided on the back surface of the casting machine 15. The clamping mechanism 10 includes two hydraulic devices each having a hydraulic cylinder 11 and a piston rod 12. On the upper frame 2 and the base plate 1, projecting

projections

13, 14 are formed at the rear, between which

projections

13, 14 the hydraulic device extends. The back surface is the side of the casting machine 15 which is arranged adjacent to the rear strut 5 and on the side facing away from the front strut 4 with respect to the rear strut 5.

A track is provided on the substrate 1 extending from the front edge of the substrate 1 to the rear edge of the substrate 1. The rails 26 may also extend forwardly beyond the front edge. The rails 26 serve to guide a carriage, by means of which the mold 8 can be moved into the press or pulled out of the press again.

In the casting machine, the insertion of the mold 8 is performed as follows:

there is no mold in the caster.

The front pillars 4 are unlocked from the base plate 1. The catching portions 17 of the upper frame 2 surrounding the front pillars 4 are released. The clasping portion 9 of the movable mounting plate 3 is not released. The mounting plate 3 is raised by means of the lifting mechanism 6 and thus the front pillar 4 is also moved upwards together with the movable mounting plate 3.

Thus, the front pillars 4 are lifted from the base plate 1. If the lifting operation is sufficient to obtain a sufficient clear width between the lower end section of the front pillar 4 and the base plate 1, the mould 8 is driven on the carriage into the space between the base plate 1 and the movable mounting plate 3.

If the lifting movement of the movable mounting plate 3 is not sufficient to create a sufficient distance between the base plate 1 and the lower end section of the front pillar 4, the front pillar 4 is first fixed with the catch 17 of the upper frame 2 and the catch 9 of the movable mounting plate 3 is released. The movable mounting plate 3 can then be lowered slightly again. Then, the hook 9 of the movable mounting plate 3 is fixed, and the hook 17 of the upper frame 2 is released. The front pillar can be raised slightly by means of a further lifting movement by means of the lifting mechanism 6. This lifting operation is repeated until there is a sufficient distance between the lower end section of the front pillar 4 and the base plate 1. The mould 8 can then be moved into the space between the base plate 1 and the movable mounting plate 3.

When the front pillars 4 are raised, tension is generated together with the clamp mechanisms 10, which counteracts the inclination of the upper frame 2 that is not supported by the front pillars 4. Thus, the upper frame 2 is held parallel to the substrate 1. Since the movable mounting plate 3 is connected to the upper frame 2 via the front pillar 4, the movable mounting plate 3 is also held parallel to the base plate 1 and the upper frame 2.

After the mould 8 has been moved into the casting machine 15, the front pillars 4 are lowered again until their lower end sections engage in the recesses 16 of the base plate 1. Then, the front pillars 4 are locked to the base plate 1. The fastening part 17 of the upper frame 2 is fixed. The clamping mechanism may then be released.

The movable mounting plate 3 is lowered onto the mould 8, fixing the mould 8 to the mounting plate. The two mold halves of the mold are locked together.

The movable mounting plate 3 is raised slightly again, whereby the mould 8 is lifted from the carriage. The carriage is thus free and can be removed from the casting machine 15 along the track 26. Since the carriage is narrower than the distance between the front posts 4, there is no need to raise these front posts to remove the carriage from the casting machine.

After the carriage has been removed, the mounting plate 3 is lowered together with the mould 8 until the mould 8 abuts on the substrate 1. The base plate 1 can be provided with centering elements so that the mould is automatically correctly positioned when lowered. Such a centering element is designed, for example, as a slider. These centering elements or sliders may also be arranged in different arrangements on different substrates to achieve the coding function. This makes it possible to ensure that only one mould 8 provided for this purpose is inserted into a particular casting machine 15.

The mold is fixed to the base plate and is therefore available for casting operations.

In the case of low-pressure casting, a furnace is provided below the base plate 1, which furnace is opened by means of a riser extending through the base plate 1, which riser leads to the mold 8 and supplies the mold with melt from below.

If desired, the latching of the two mold halves of the mold 8 can be released, for example during a cleaning operation, and the upper mold half can be raised together with the movable mounting plate 3.

The removal of the mould 8 from the casting machine is reversed with the insertion of the mould, whereby the mould is raised first, the carriage is withdrawn, the mould is placed on the carriage and the front pillar is raised, driving the carriage together with the mould from the casting machine.

By raising the front pillars 4, it is possible to use molds 8 in the casting machine that are a greater distance than the front pillars 4. The casting machine 15 according to the invention is therefore significantly more flexible in terms of the moulds 8 to be inserted than conventional casting machines.

The mould weight is typically in excess of 10 tonnes and may weigh up to 40 tonnes.

It may also be advantageous to raise only one front pillar 4. This is particularly suitable when the mold 8 protrudes asymmetrically on the carriage.

Fig. 3 schematically shows an arrangement of a plurality of casting machines 15 arranged along a conveyor 19. The casting machines 15 each have a fixed position in the production facility and are connected to hydraulic lines, power lines, and data lines. The juxtaposed casting machine 15 can only carry out the loading or unloading of the moulds 8 at the front, i.e. from the conveyor. The mould 8 is lifted on the conveyor 19 by a forklift or a special transport vehicle. By raising the front pillars 4 of the casting machine 15, even in the case of such a multiple caster arrangement, they can be loaded and unloaded with molds 8 of any length or width.

In production plants where the casting machines are loaded and unloaded from the side, there are also other arrangements of the casting machines 15. In such a production plant, the casting machines are aligned with their front legs 4 to the side.

If special transport carriages are provided for transporting the moulds, the top of the carriages is adapted to the height of the top of the base plate 1.

Fig. 2 shows a second embodiment of the casting machine according to the invention. This embodiment basically corresponds to the first embodiment, and further has a base plate 1, an upper frame 2, a movable mounting plate 3, a front pillar 4, a rear pillar 5, a lifting mechanism 6, clasps 9, 17, and a mold 8. The same components will not be explained again.

The second embodiment of the casting machine 15 differs from the first embodiment in that a clamping mechanism is not provided. In the second embodiment, the rear pillar 5 extends slightly above the upper frame 2. A reinforcing device 20 is formed between a section of the upper frame 2 remote from the rear pillar 5 and the rear pillar 5 projecting upward at the upper frame 2. In the present exemplary embodiment, the stiffening means 20 of the two rear struts 5 are designed in each case as struts.

Further, the second embodiment has a separate lifting device 21 for raising and lowering the front pillars 4. The lifting device 21 has a hydraulic cylinder 22 and a piston rod 23. The hydraulic cylinder 22 is fastened to a forward projection 24 on the upper frame 2. The piston rod 23 projecting upward from the hydraulic cylinder 22 is connected to a yoke 25, and the yoke 25 extends between and is coupled to the upper ends of the two front pillars 4. By lifting and lowering the yoke 25 by means of the lifting and lowering device 21, the two front pillars 4 can be raised. The lifting device 21 of the second embodiment allows the front pillars 4 to be raised and lowered much faster than it is possible in the first embodiment. This embodiment has only a single hydraulic cylinder. The lifting device can of course also be designed with a plurality of hydraulic cylinders, which can be arranged on both sides of the casting machine 15, in particular laterally, in the linear extension of the yoke 25.

The operation of the casting machine 15 according to the second embodiment is substantially the same as that of the casting machine 15 of the first embodiment. The tilting of the upper frame 2 is prevented here by the stiffening means 20. Therefore, tensioning by the clamping mechanism 10 is not required. The raising and lowering of the front pillar 4 is performed independently of the movement of the movable mounting plate 3.

List of reference numerals

1 substrate

2 Upper frame

3 Movable mounting plate

4 front strut

5 rear support

6 lifting mechanism

7 lifting rod

8 mould

9 buckling part

10 clamping mechanism

11 hydraulic cylinder

12 piston rod

13 projection

14 protrusion

15 casting machine

16 concave part

17 fastening part

18 upper die half body

19 conveyor

20 reinforcing device

21 lifting device

22 hydraulic cylinder

23 piston rod

24 projection

25 yoke

26 track.

Claims

1. A press for a casting machine, comprising:

a fixed base plate, a fixed upper frame and a movable mounting plate, wherein two front struts and two rear struts are arranged in the corner regions of the base plate, of the movable mounting plate and in the corner regions of the upper frame, are coupled to the movable mounting plate by means of guides and are fixed to the base plate and to the fixed upper frame, wherein

The press is a vertical press with vertically arranged pillars,

wherein the content of the first and second substances,

the front strut is releasably secured in the base plate and the upper frame and is movably arranged relative to the base plate, the upper frame and the movable mounting plate such that: they can be at least partially removed from the area between the base plate and the movable mounting plate,

a clamping mechanism is disposed between the upper frame and the base plate adjacent to and distal from the rear stanchion to create tension with the raised front stanchion that compensates for tilt of the upper frame relative to the base plate.

2. The press according to claim 1, wherein the press is,

wherein the content of the first and second substances,

a lift mechanism is disposed on the upper frame, the movable mounting plate being coupled to the upper frame.

3. The press according to claim 2, wherein the press is,

wherein the content of the first and second substances,

the movable mounting plate has a fixing device by means of which the movable mounting plate can be fixed to the front pillar.

4. The press according to claim 1, wherein the press is,

wherein the content of the first and second substances,

a lifting device for raising and lowering the front pillars is provided at the upper frame.

5. The press according to claim 4, wherein the press is,

wherein the content of the first and second substances,

the clamping mechanism comprises at least one hydraulic or pneumatic cylinder or spindle drive.

6. The press according to claim 1, wherein the press is,

wherein the content of the first and second substances,

the rear posts may extend slightly above the upper frame and stiffening means may be formed between a region of the upper frame remote from the rear posts and rear post sections projecting upwardly at the upper frame.

7. The press according to claim 1, wherein the press body,

wherein the content of the first and second substances,

the movable mounting plate is formed by a mounting frame and a pivot plate which is pivotably mounted on the mounting frame, in which case the pivot joint between the mounting frame and the pivot plate is arranged in the region adjacent to the front pillar, so that the pivot plate can be pivoted downwards and forwards relative to the mounting frame.

8. The press according to claim 1, wherein the press body,

wherein the content of the first and second substances,

the base plate has fixing means for fixing the front pillars at their lower end positions on the base plate.

9. A casting machine having a press, the press comprising: a fixed base plate, a fixed upper frame and a movable mounting plate, wherein two front and two rear posts are arranged in corner regions of the base plate, of the movable mounting plate and in corner regions of the upper frame, which are coupled to the movable mounting plate by means of guides and are fixed to the base plate and to the fixed upper frame, wherein the press is a vertical press with vertically arranged posts, wherein the front posts are releasably fixed in the base plate and the upper frame and are movably arranged with respect to the base plate, the upper frame and the movable mounting plate such that: which are at least partially removable from the area between the base plate and the movable mounting plate, wherein the base plate is embodied for accommodating a mold,

10. A method for changing molds on a caster according to claim 9 by raising at least one vertically disposed front support column to change molds and then moving molds out of or into the caster.