| 摘要 |
PURPOSE:To eliminate the need for the mixing of the foaming agent and the setting of a deaeration (drying) process by executing foaming action by the evaporation phenomenon of moisture made contain in bark and the heating and expansion action of a resin. CONSTITUTION:The quantity of bark is compounded in quantity more than plastics, and a spool member 3 is intruded into a cavity 14 and the composite material is injected and filled at high pressure. Pressure is reduced, one parts 13 of a die are opened by the action of resilient instruments 7, the inside of the cavity 14 is expanded, and the specific gravity of a shape 15 is brought to 1.0 or less. Fixing frames 24 incorporating a runner member 21 in which an injector 18 is connected at the center 19 of a runner 20 communicated with injection holes 22, 23 at both ends is installed tightly at the center of a machine base, and pressure devices 27, 33 are separately set up oppositely in order to alternately open and close two pairs of dies to the back and thickest-section surfaces of a fixed section. The L/D of a screw is shortened, the degeneration of material itself is prevented, facilities are miniaturized through alternate molding at every half quantity, and operating cost is economized. |
