Direct Feeding Furnace

FEATURES

・Melt feeding accuracy is high.
・ The quality and temperature of the melt is stable, and loss due to oxidation is minimized.
・ Thermal efficiency is good, contributing to energy savings.
・ The heater can be easily replaced.
・ A complete set of safety devices is incorporated into the furnace.

CONSTRUCTION

The primary components consisting of this furnace are as follows: the holding chamber equipped with a melt receiver and a melt level controller; the control chamber with a level sensor; the tapping chamber with a melt tapping system; and the melt feeding pipe. The melt level in the holding chamber is controlled by either the pneumatic system or the float type mechanism. The melt is tapped out by either the float type mechanism or the pneumatic system. The melt level in the holding chamber is forced to be lowered by the float or air pressure, and the melt level is accurately controlled with the level sensor in the control chamber: the holding chamber and the control chamber are connected with each other through a connecting port located at the bottom of the furnace. In the furnace using the pneumatic system for melt tapping, the tapping chamber is located next to the control chamber. While the spindle in the tapping chamber goes up and down, the melt in the control chamber flows into the tapping chamber through its bottom, at the time of which air pressure is applied to press the melt down such that the melt is tapped out from the furnace and fed directly into the sleeve. Hirochiku is ready to be flexible in combining of any of these principal functions so as to design and make a furnace which is best suited to the user’s system specifications. For the heating system in the holding chamber, radiant heaters are used for the pneumatic system and immersion heaters, for the float type mechanism. The melt feeding pipe is warmed by heaters.

Fig. 1 Float type level controlling and float type feeding

(1) Melt receiver (2) No. 1 float (3) Level sensor (4) Heater (5) No. 2 float (6) Sleeve (7) Mouthpiece (8) Feeding pipe (9) Tapping chamber (10) Spindle (11) Control chamber (12) Immersion heater (13) Holding chamber

Fig. 3 Pneumatic level controlling and pneumatic feeding

(1) Melt receiver (2) Radiant heater (3) Level sensor (4) Feeding cylinder (5) Heater (6) Sleeve (7) Mouthpiece (8) Feeding pipe (9) Spindle (10) Tapping chamber (11) Control chamber (12) Holding chamber

SPECIFICATIONS

Model	LC-750S	LC-1000S	LC-1500S
Holding capacity (kg)	750	1000	1500
Effective quantity for use (kg)	230	300	450
Casting weight (kg)	2	4	6
Tapping accuracy (±2%)	2	2	2
Power requirements (kw)	20	24	30