Low Pressure injection Molding Equipments (http://www.pelcor.com)
Computerized Semiautomatic Low Pressure Molding Machine MIGL-33C for molding net shape ceramic, metal and wax parts for experimental or small production, using thermoplastic or thermosetting binders
(U.S. Patent N 4,416,603)

Production rate up to 70 cycles per hour, depending on the complexity of a mold.
Stainless steel tank, tank lid, mixer blades and feeder pipe.
Tank volume 0.8 gallons (3 liters).
Double blade planetary mixer with variable speed of rotation in the tank.
Pneumatic clamping cylinder.
1/4 HP mixer motor.
Max. molding air pressure up to 70 psi (5 kg/cm.sq.).
Molding temperature up to 300F (150C), independently controlled in the tank, in the feeder pipe and at the orifice with three microprocessor temperature controllers with digital display.
Vacuum pump for deairing during mixing.
Average energy consumption 1 kW.
Power: 110/120 VAC, 50/60 Hz, single ph.
Overall dimensions 25"L x 24"D x 56"H; (635 x 610 x 1425 mm).
Weight approximately 400 lbs. (190 kg).
Maximum size of molds 12" x 8" x 16"; (395 x 205 x 410 mm).

The Low Pressure Molding machine MIGL-33C can be operated whether from its manual control station with push buttons and micro processor based temperature controllers or from a computer interface.
All pressures and temperatures are controlled in computer mode and may be recorded during each cycle and stored on the hard drive for future analysis by other programs such as Excel or Lotus.

The computer operator interface program has been developed in LabView, a National Instruments graphic programming language, which is cross platform compatible with Macintosh, IBM, or Sun.

The computer monitor has visual representation of the Machine control panel. Operation in the computer mode is done by pushing "buttons" and "switches" on the screen with the mouse.

The MIGL-33C in computer mode can work in:

Opened loop:
The molding pressure is measured in the tank and the pressure transducer in the mold is not used. The pressure in the tank is preset and maintained at a constant level during molding.

Closed loop:
The pressure is preset in the mold and feedback signal from a Piezo Pressure Transducer in the mold is fed to electronic pressure regulator which changes pressure in the tank of the machine to maintain preset pressure in the cavity of the mold.

I/O Structure

Two analog outputs:
Presets pressure in the electronic pressure regulator.
Sends signal to the optional water valve to control water supply to the mold for controlling its temperature.
Eight analog inputs:
Thermocouple cold junction compensation.
Thermocouple in the tank.
Thermocouple in the feeder pipe.
Thermocouple in the orifice.
Thermocouple in the mold.
Pressure in the tank.
Pressure in the cavity of the mold.
Future use.
Eight digital outputs:
To control solenoid valves and
heating system of the machine.
Eight digital inputs:
To monitor status of the machine.