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BPC Low Pressure Casting Machine for Aluminum

The LPM Low Pressure Casting machine with a Crucible Furnace

In this low pressure casting machine, the 4+4 column vertical press houses in its lower part a steel welded structure enclosing an electric, crucible-type holding furnace.   A proportional pressurization control on the crucible furnace affects the movement of the aluminum from the furnace to the dies during the low pressure casting process.

Working temperature is obtained by means of a series of heating elements that are fixed on 6 removable plates that embrace the outer structure of the crucible.

This system allows the furnace to maintain the working temperature even when only 5 elements are working, allowing the on-stream production to end.  Using this method of mounting the elements through the wall of the furnace,  the necessity to slide out the crucible when a faulty element requires replacement is eliminated.

 

The crucible furnace is mounted on a trolley allowing it to slide out frontally for ease of maintenance and crucible replacement.

 

A hoisting system driven by a hydraulic motor operates two screw jacks guided by four columns that allow lifting the furnace (up to 250 mm) to move it into its working position below the low pressure casting machine.

 

 

 

Vertical Press
Clearance between the columns longitudinal 1775 mm
transverse 1000 mm
Platen stroke   1300 mm
Moving column diameter   110 mm
Min. distance  between platen and casting table   540 mm
Opening force   200 KN
Locking force   250 KN
Ejection force   250 KN
Jack cylinder stroke   180 mm
Jack cylinder locking force   60 KN
Working dimensions including furnace housing (p x l x h)   1500 x 2300 x 6350 mm
Weight   13000 Kg
 

Pressure Furnace

Type crucible furnace
Capacity 600 kg | 800 kg
Electric Power 60 kW | 60 kW
Temperature control Thyristors
Max operating pressure 2 bar
 

Hydraulic Pack

Tank capacity 600 lt
Operating pressure 80 120 bar
Motor electric power 22 kW
Type of pump piston
Flame-retardant fluid  Glycol water
Cooling water consumption approx. 450 lt/h
Overall dimensions (p x l x h) 1300 x 2500 x 1500 mm
Weight 2000 Kg
 

Control unit

Control panel SIEMENS ALLEN BRADLEY
PLC unit S7 SLC 500
Voltage   400 V 50 Hz
Auxiliary circuit voltage   110 V AC
PLC In/Out voltage    24 V DC
Overall dimensions (p x l x h)   2000 x 500 x 2100 mm
Weight   800 Kg
 

Installation data

Power
Average consumption 30 kW/h
Connected load min. 80 kW
Compressed air
Pressure 6 - 8 bar
Cooling circuit consumption 150 Nm3/h
Furnace pressurization consumption 2 Nm3/min
Water
Pressure 2 - 3 bar
Hydraulic unit flow rate (with water at 25C) 18,5 lt/min
Cooling circuit flow rate 15 lt/min

 

 

 

 

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Copyright 2014 Sawyer and Smith Corporation
Last modified: 07/08/14