ARCONTEC Low pressure casting machine

Low pressure casting machine with raised furnace pressure Type NDM – A – 95

Machine description:

The arrangement is developed for casting of aluminium alloys by a low pressure casting procedure. The machine can be described as a stable and robust, self-supporting construction. Besides, the base plate and the upper plate (both stiff) are connected with 4 hard-chromium-plated columns. The columns take up the internal charges and permit the operation with a furnace pressure up to max. 5 [bar]. The max. closing pressure of the machine amounts to 620 [kN] with 140 [bar] hydraulic system pressure.

With modern control elements and regulation elements the whole casting process is operated, the metal temperature regulation and the cooling are steered by the system, are regulated, controlled and analyzed.
This guarantees the possibility for reproduction of all technological parameters.
All process sequences are visualised by the built-in monitor.
The especially developed casting system and cooling system with freely programmable parameters guarantees a dynamic filling of the mould and a directed solidification of the cast, which increases product quality as well as productivity.

Intended use:

The machine is able to operate with metal forms with and without metal cores, in metal forms with sandy cores or in sandy forms and gypsum forms.

Components of the machine:

The upper plate:
The closing cylinder is mounted on the upper machine plate. The opening and closing speed of the mould is adjustable by proportional valves.

The movable plate:
This plate is connected with the closing cylinder. On the plate the ejector mechanism as well as two guiding columns are mounted.
The plate carries the upper form, which is half of the mould, as such it is responsible for opening and closing the mould. With its four generously dimensioned sliding bearings which are supported by two additional guiding columns the upper plate guarantees a sure and exact guidance while opening and closing the mould.

The intermediate plate:
This is the lower mould plate. By two hydraulic cylinders the plate could be bolted to or separated from the machine furnace.

The furnace lid:
The furnace lid closes and seals the machine furnace. The stand pipe is mounted inside.
The stand pipe adaptation of the lid is a special construction which permits the application of ceramic-, grey iron- and steel pipes. Hence, the cleaning of as well as exchanging the stand pipe are especially easy.

The machine furnace:
The furnace is heated electrically. The steel coat is a welded construction according to the regulations for pressure vessels. The coat is able to take up a crucible of the company Hindenlang, type BU500. The furnace is easy to handle.

The base plate:
IIn this plate the guidance for the furnace, its transport device and the closing cylinder of the intermediate plate are mounted.

The hydraulic system:
The machine is equipped with its own hydraulic aggregate. The nominal working pressure is 140 [bar], the hydraulic fluid is optionally mineral oil or a mixture of water and glycol.

The machine control:
The standard is a memory-programmable control (PLC) with a human- machine-communication part (screen and control elements).
All important data, process parameters and process sequences are charted on the screen. Alerts and disturbances are also controlled with the graphic operating surface. The control admits the possibility to document all parameters with a printer directly attached to the machine.

The pneumatic system:
The furnace pressure occurs with pneumatic elements proportionally and with accompanying sensors.
The system allows a free-determinable furnace pressure during the casting process with real time speeds while filling the mould.
Process analysis, control and regulation of the furnace pressure guarantee the ability for reproduction of the casting process during the casting of a load from the first up to the last part.

The cooling system:
The cooling system is able to work with air, water or an air-water-emulsion as a coolant. The standard type of the cooling system consists of six cooling circuits for air cooling.
The specific feature of the cooling is its regulation: every cooling circuit is freely programmable in matters of time, flow and temperature, also any identity lines (flow time diagrammes) are possible. Furthermore the cooling guarantees the highest ability for reproduction of the cooling process (solidification) for all cast parts with its control unit.

The regulation of the metal temperature:
The furnace is normally equipped with two thermocouples (melt and heating).
The metal temperature in the furnace is held by a two point regulation in the PLC in narrow confines .

 

Low pressure casting machine with raised furnace pressure Type NDM – A – 95

Technical data

The machine is developed for casting of aluminium alloys by low pressure casting procedure. It is conceived as a stable and robust, self-supporting construction which takes on high internal charges and permits working with raised furnace pressure. The machine achieves a max. closing pressure of 620 [kN] with a hydraulic system pressure of 140 [bar].
Coat and lid of the furnace are designed as stable steel construction for a working pressure up to max. 5 [bar].
The machine operates the whole technological procedure with a modern and intelligent control as well as regulation elements. All processes of the casting, the filling of the mould, the metal temperature as well as the cooling are automatically analyzed by the system, are steered, regulated and monitored. All processes are visualised by a built-in monitor.

The low pressure casting machine consists of the following systems and components:

 

Low pressure casting machine with raised furnace pressure Type NDM – A – 95

Technical data sheet