| 摘要 |
The method of the present invention involves taking a comminuted mixture of waste plastic materials, feeding the mixture into a screw extruder capable of applying heat and pressure to the mixture; using the screw extruder to heat the mixture to a temperature of between 350 DEG and 600 DEG Fahrenheit; and forcing the molten mixture outwardly through a die opening under a pressure of from 100 lbs. per sq. inch to 600 lbs. per sq. inch into a mold in tightly sealed relationship over the die opening. The mold, after being filled, is removed from the screw extruder, and the mixture is permitted to cool and harden in the mold. The hardened mixture is then removed from the mold. |
