DE10043717A1 - Process for compressive reforming of aluminum or magnesium alloys comprises conveying the liquid or liquid material from a preparation chamber into a casting chamber of a die casting machine - Google Patents

Abstract

Process for compressive reforming of metallic materials comprises conveying the liquid or liquid material from a preparation chamber into a casting chamber of a die casting machine. An Independent claim is also included for a device for compressive reforming of metallic materials comprising a heating chamber (3) as the preparation chamber directly connected to the casting chamber (6) via a heating channel (4). Preferred Features: The material is conveyed at elevated temperature with the exclusion of air. The material is made of aluminum or magnesium.

Description

The invention relates to a method for pressure forming metallic materials, in particular of aluminum or magnesium alloys according to the preamble of Claim 1.

The invention further relates to a device for pressure forming metallic Materials.

Die casting of metallic materials in liquid form is well known. For this, a metal, for example made of an aluminum alloy, is placed in a boiler brought molten state and in portions in the casting chamber Die casting machine transferred. The liquid metal is then connected using a pouring piston ssend pressed into the mold where it solidifies.

Die casting is widely used in various variants in industry changes however a high mechanical and control expenditure. Also ent despite all efforts, the working and environmental conditions do not speak today Conditions. Segregations and segregation are always present in the components the.

Also processes in which the materials are in a semi-solid or semi-liquid state to be shed require a similar amount of effort.

It is also known to granulate metallic materials and to research them in the extruder to generate such material conditions for die casting. So describes the DE-C-199 07 118 a device for producing molded parts from metallic Material. The metallic material is processed in an ei extruder nem granules to thixotropic solid-liquid material in constant forced conveyance. The extruder has at least two intermeshing screws and the semi-liquid one Material goes directly into the dining room of an A through a non-heated duct  injection cylinder of a pressure or injection molding machine. Such a device and procedure still requires at least partial reshaping and opening melting of the metallic material. The required granulate must first be made a melt, it is due to segregation and / or ent Mixtures are not homogeneous and oxides are included.

The invention is based on the object of a method for pressure forming to develop metallic materials, which allows the material in the be required amount and with significantly lower energy consumption of a spray or pressure to feed the casting machine. The problem is solved with the characteristic Features of claim 1.

The invention is also based on the object of a device for printing men to create metallic materials, what with the features of the claim he follows.

Advantageous embodiments are disclosed in the respective subclaims.

The pressure forming according to the invention preferably includes the processing of Materials in the partially liquid state, but closes completely liquefied materials with a.

The invention allows the metallic material, in particular aluminum or Magnesium alloys warms in the solid state in the form of bolts or the same are provided. Here, the material can be heated (below the Liquidus temperature) are kept ready in a press, this press too can have a magazine for several bolts (for example as Bar or drum magazine). The bolts can be kept in portions or portioned directly in the press for each shot.

The press is directly connected to the casting chamber of a spray or die casting machine connected so that it does not come into contact with the ambient air follows and the oxide formation is therefore largely avoidable. This is also through the Filling degree of 100% favored. The press can be parallel or vertical or angled  be arranged to the die casting machine. For oxides present on the bolts a simple stripping system can be provided.

The heated channel also enables processing of magnesium materials without Shielding gas application, in particular can ver on environmentally hazardous shielding gases to be waived. An evakuie is also a substitute for the use of protective gases ren of the supply room up to the casting chamber. It is advantageous for the he warm or keep the bolts warm the waste heat of the bolt casting device with ge uses.

The heated channel is preferably height-adjustable and can be docked or be pressed. The press and / or the platen can also be adjusted in height be trained bar.

The transport routes of the material are short. Through lower processing temperatures the tool life can be extended. In addition, the energy expenditure reduced, the working and environmental conditions are improved.

Material overheating is not necessary.

In addition to partially liquid portions, liquid materials (conventional printing cast). Common requirements for a metallurgical (or mechanical Sche) grain refinement etc. must be observed when producing bolts. It can also alloys that have hitherto been less common

In the semi-liquid state of the material there is normally no closure device required for the casting chamber, rather with liquid materials.

With the invention three processes are combined per se, the production of bolts from the melt, its further handling in the solid state and its processing processing in the semi-liquid state.

The effort to provide the material to the casting chamber is drastically re duced.  

The position of the casting chamber (horizontal, vertical or oblique) itself is irrelevant.

The invention is described in an exemplary embodiment based on a drawing described in more detail. The drawing shows a basic arrangement in the single figure.

A press 1 is arranged parallel to a conventional die casting machine 2 . The press 1 contains a heating chamber 3 , in which a bolt, not shown, made of an aluminum material is heated and held at a temperature of approximately 450 ° C. to 500 ° C. Additional bolts can be kept in a Stan gene magazine, also not shown, at a temperature up to approx. 500 ° C. The bolts themselves can be easily delivered from the smelter using a forklift. The rod magazine is heated in a manner known per se from the waste heat from the smelter. Alternatively, gas heating is possible, for example.

An outlet opening of the heat chamber 3 of the press 1 is connected airtight with a curved heating channel 4 . The other end of the heating duct 4 can be docked airtight onto the filling opening 5 of a casting chamber 6 of the die casting machine 2 . The heating duct 4 is adjustable in height.

By means of a piston-cylinder device 7 of the press 1 , the bolts or portions can be transferred in a still solid form with a change of direction of 90 ° into the casting chamber 6 . The heating channel 4 has a plurality of independently controllable Heizele elements and its inner wall is surface treated in a suitable manner. The portion comes at a temperature below the liquidus temperature or ver liquefied at a temperature slightly above the liquidus temperature in the Giesskam mer and is pressed into the mold by means of a casting piston 8 .

Both the heat chamber 3 and the heating duct 4 and the casting chamber 6 have suitable temperature sensors.

List of reference symbols

1

Press

2

die casting machine

3

heat chamber

4

heating duct

5

fill opening

6

casting chamber

7

Piston-cylinder unit

8th

casting piston

Claims (8)

1. A process for the pressure forming of metallic materials, the material reaching a casting chamber ( 6 ) of an injection or die casting machine in partially liquid to liquid form, characterized in that the material to be provided in the form of bolts and / or portions is heated and directly from a staging space into a casting chamber ( 6 ) is transferred. 2. The method according to claim 1, characterized in that the transfer tion takes place in the absence of air and when the temperature rises. 3. The method according to any one of claims 1 or 2, characterized in that that for the heating of the material in the staging area the waste heat before future sub-process is used. 4. The method according to any one of the preceding claims, characterized indicates that the materials are aluminum or magnesium. 5. Device for pressure forming metallic materials in a die casting or injection molding machine, the material to be processed being transferred from a supply space into a casting chamber ( 6 ) of the die casting machine ( 2 ), characterized in that the supply space is a heat chamber ( 3 ), which is directly connected to the casting chamber ( 6 ) by means of a heating channel ( 4 ). 6. The device according to claim 5, characterized in that the heat chamber ( 3 ) as part of a press ( 1 ) is arranged in parallel or at an angle up to perpendicular to the die casting machine ( 2 ). 7. Device according to one of claims 6 or 7, characterized in that the heating channel ( 4 ) has individually controllable heating elements and adjustable in height to a filling opening ( 5 ) of the casting chamber ( 6 ) can be docked. 8. Device according to one of claims 5 to 8, characterized in that the casting chamber ( 6 ) is arranged horizontally or vertically.