Method of injection molding a low-melting-point alloy

• Main Author: Takeya, Kengo
• Format: Patent
• Language: English
• Published: 12.09.2002

In a control method of the injection molding in accordance with the invention, in the process of injecting molding a low-melting-point alloy, an upper limit Q max and a control lower limit CQ min of a quantity of material detained in a cylinder 12 are set to eliminate an excess or a shortage of the quantity of material detained in the cylinder 12. A material in a quantity greater than shot weight Q out is fed continuously into the cylinder until the upper limit is reached, while the material in a quantity less than the shot weight is fed into the cylinder until the lower limit is reached, thereby automatically maintaining the quantity of material detained in the cylinder within the range between the upper and lower limits. Accordingly, the down time due to the instability of metering in a molding machine can be reduced, and manpower for adjustment of conditions is not required, thereby making it possible to curtail the cost.