DE102007023337A1 - die casting machine - Google Patents

Abstract

The invention relates to a die casting machine for casting light metal materials, in particular a horizontal die casting machine, which enables a simple arrangement of the BAP with simple means. For this purpose, the movable platen (3) by means of struts (5) is connected to a closed frame construction.

Description

The The invention relates to a die casting machine for casting light metallic Materials, in particular a horizontal die casting machine.

die casting machines, In particular, horizontal die casting machines also include other assemblies vertically aligned platens, at least a fixed platen (FAP) and a movable platen spaced therefrom Clamping plate (BAP). On the clamping plates are the mold halves arranged. The BAP is powered by means of power transmission regarding FAP movable on a machine bed to open the mold respectively. close. For this the BAP is mostly over columns guided.

In a horizontal die-casting machine according to DE-A-3025189 is a base plate of the BAP from its vertical working position out in an approximately horizontal mounting position and pivotal locking arms provided for mechanical locking with the FAP in the working position, which are pivotally hinged to the FAP and in the working position of the base plate of the FAP their associated abutment in embrace the upper edge area of the base plate.

In a barless mold closing device according to EP-A-0722820 the closing and tearing force is absorbed by the machine frame, which is widened. To maintain the parallelism of the mold halves, at least one leg of the machine frame has a cross-sectional weakening, which allows an elastic deformation without angular deviation of the mounting surface of the mold halves from their vertical working position. The cross-sectional weakenings are, for example, slits ending in a round arch.

In the WO-A-00/35653 is a toggle-like form-locking device hinged to one leg of the C-shaped machine frame and the FAP on gegenüberlie ing leg. The legs can also have a hollow structure in addition to a solid structure.

From the US-A-2002/0102325 is a two-plate injection molding machine is known, the BAP elements of a frame structure to achieve lateral access for drive means.

depositors for casting light metal melts (die casting machines) and Kunstoffen (injection molding machines) exhibit today's state of the art Technique at least 2 mold halves. The solid mold half is built on the fixed platen of the casting machine. The movable mold half becomes corresponding with the movable Joining plate connected. About a movement of the moving Clamping plate, the mold is closed and after the casting process opened again. During the actual casting become the mold halves of strong closing forces against the explosive force (casting pressure × part area) locked. These closing forces lead to a unwanted deformation of both clamping surfaces, resulting in leaks the mold can lead.

The Clamping plates of injection and die casting machines have different Shapes on. To serve as criteria for the shaping z. B. the rigidity of the platen with respect to deflection, the guidance of the movable platen on the columns and the accessibility of the ejector for the Operator.

The following constructions are known for the movable platen: Steel plate: Clamping plate made of steel with screwed-on or welded-on straps for the joint bearing of a toggle-type locking unit → low deformation thanks to a large modulus of elasticity (steel) cast plate: Chipboard made of ductile iron with suitable design, eg. B. with cast-on tabs for the joint bearing of a toggle-type locking unit → material arrangement suitable for strength → integration of other functions (links for joint support) → fabrication advantages Hollow cast: Ductile iron core with cast-in core to create a cavity with the aim of increasing the plate stiffness with respect to deflection → strength-optimized material arrangement, especially for large machines → improved guidance of the movable clamping plate on the columns

The Design of the movable clamping plate was previously in die casting as a solid body, with no cavity running to one to allow easy accessibility of the ejector plate.

The Operating mode and the design of the ejector give way to injection molding machines from that of die casting machines. Therefore, in the injection molding area Hohlguss- and box constructions known to stretch in a relative poorly accessible ejector within the casting is arranged.

in the Injection molding area have been 2-plate closing units for 10 years known. This machine concept allows mechanical simpler locking concepts with better power distribution and less Raw material requirements. Therefore, this design principle is above all used for larger machine sizes.

Of the Invention is based on the object, a die casting machine, in particular To create a horizontal die casting machine with simple Means a rigid arrangement of the BAP allows, so that even at maximum closing force almost no deflection resp. Parallelism deviation of the mold halves occurs. The object is solved with the features of the claim.

The Die casting machine is as two-plate die-casting machine and their BAP is designed in the form of a closed frame, which the Closing force absorbs virtually deformation-free. In addition, so next to a protection of the guide columns from contamination also a large support and sliding surface on the Machine bed reached.

Further Embodiments are in the subclaims disclosed. Thus, the clamping force for the positive connection on applied to the guide columns.

To the Protection of the toothing area of the columns (positive locking Lock for force introduction), the lock with the Column around a defined by the machine specification Mass of the clamping surface of the movable platen be reset. This can be done with screwed spacers or by means of a casting technology generated extension of the movable Clamping plate can be achieved. One more way It would be the force-generating cylinder so long to build that this function will take over the protection of the Säulenzahnung can.

The disclosed embodiment of the movable platen allows the protective function of the column optimally with the strength-appropriate Design of the movable platen to connect.

When essential feature of the platen is the cast or bolted cylindrical column protection area connected with the clamping cylinder support with struts to form a frame. This frame prevents a deviation of the axial position under tension and thereby the deformation of the clamping surface. By the Striving is the axis expansion between two columns strong reduced. The advantageous molded protective tube of Säulenzahnung is thereby held in the axial direction, which is a moment against the load deflection of the clamping plate results. This counter-torque reduces the deflection in the area of the clamping surface by about a factor of 2. The introduction of force into the column protection tubes is through a rear of the relatively thin platen Guaranteed infused reinforcing frame.

thanks This design of the movable platen can be the deformation the clamping surface without higher material requirements be reduced by almost a factor of 2 In addition, the column protection function suitable to be integrated into the clamping plate. As more very useful feature proves an extremely small deformation the cylinder mounting surface. The force-generating cylinder becomes as best as possible against bending moments and shear forces protected.

The Column bending, a central problem of two-plate machines, is due to this construction in the movable platen almost eliminated.

The accessibility to the evaluation unit 14 stays thanks to the thin strut connection 5 largely preserved.

The Invention will be hereinafter in an embodiment described in detail with reference to a drawing. In the drawing show the

1 a side view of a horizontal die casting machine

2 a schematic diagram of the movable platen.

A horizontal die casting machine has a machine bed 1 with a fixed clamping plate (FAP) arranged vertically to it 2 on and one on the machine table 1 sliding movable movable platen (BAP) 3 on. The BAP 3 has one by means of struts 5 closed frame and a foot 7 on. To FAP 2 and BAP 3 are each a mold half 16 respectively. 17 arranged. The BAP 3 is in four columns 8th led, in turn, in the FAP 2 are stored. There are two upper and two lower columns 8th intended. Every pillar 8th is a force cylinder arranged on the BAP 9 assigned, by means of which the positive engagement force on the respective column 8th is applied.

Between the lower columns 8th is a movement cylinder 10 intended.

The columns 8th are grooved in the area of the BAP and the power cylinder, in the form-locking elements of a lock 11 intervention. At the free end of the upper columns 8th can a column coupling 12 engage in the end groove of a pillar. A column pull-out cylinder 13 is between lock 11 and column coupling 12 arranged.

To pull the upper columns 8th First, the mold halves 16 and 17 closed for a residual distance. When the coupling position is reached, the column coupling engages 12 in the end groove of the column 8th one. Subsequently, the connection between column and FAP is solved. The movement cylinder 10 drives the BAP 3 Open direction form. Together with the BAP will also be the coupled column 8th from the FAP 2 extended. The column extraction cylinder 13 moves the column coupling 12 with the coupled column 8th Continue to open the mold until the pillar 8th has been completely withdrawn to the BAP.

The return movement of the drawn column 8th takes place in reverse order. The hydraulic power supply for the cylinder movements is provided by a pump group 15 made available. The generation of motion can also be done electromotive.

1

machine bed

2

firm Clamping plate (FAP)

3

portable Clamping plate (BAP)

4

Columns thermowell

5

strut

6

rib

7

Foot

8th

pillar

9

power cylinder

10

moving cylinder

11

lock

12

column coupling

13

Columns pull cylinder

14

ejector

15

pump group

16

firm mold

17

portable mold

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3025189 A [0003]
• - EP 0722820 A [0004]
• WO 00/35653 A [0005]
• - US 2002/0102325 A [0006]

Claims (9)

Die casting machine for casting lightweight metal materials, in particular a horizontal die casting machine with a machine bed, a fixed clamping plate arranged thereon and a movable clamping plate movable relative thereto, which is guided in columns, characterized in that the movable clamping plate ( 3 ) by means of struts ( 5 ) is formed into a closed frame. Die casting machine according to claim 1, characterized in that the movable clamping plate ( 3 ) one foot ( 7 ) having. Die casting machine according to claim 1, characterized that a movement cylinder between the lower pair of columns is arranged. Die casting machine according to at least one of claims 1 to 3, characterized in that each column ( 8th ) a power cylinder ( 9 ) on the movable platen ( 3 ) assigned. Die casting machine according to claim 1, characterized in that rigid column protection tubes ( 4 ) non-positively or cohesively with the movable platen ( 3 ) are connected. Die casting machine according to claim 5, characterized in that the column protection tubes ( 6 ) at one of the clamping surface opposite end by means of struts ( 7 ) are connected to a frame. Die casting machine according to one of the preceding claims, characterized in that the movable clamping plate ( 3 ) is thin and as a result of striving ( 5 ) is only reinforced in the area of the introduction of force. Die casting machine according to one of the preceding claims, characterized in that the surface loading of the movable clamping plate ( 3 ) by means of ribs aligned with the center of the clamping plate ( 6 ) along the column protection tubes ( 4 ) to a power cylinder ( 9 ). Die casting machine according to one of the preceding claims, characterized in that for storage and guidance of the movable platen ( 3 ) necessary feet ( 7 ) are integrated directly into the movable platen casting technology.