The invention relates to an energy-saving high-efficiency closed-type pressurizing
oil supply sectional material extruder which comprises a base, a mould, an
ingot containing
barrel, an auxiliary cylinder, a shearing device and an
oil supply system, wherein the mould, the
ingot containing
barrel and the auxiliary cylinder are sequentially arranged on the base; the
oil supply system comprises a main cylinder and an
oil storage tank; the main cylinder is provided with a
plunger; the extruder is a short-
stroke extruder; the
ingot containing
barrel of the extruder is arranged on the top position of an
extrusion rod, and the ingot containing barrel forms a feed space with the mould during displacement; the
oil storage tank includes a closed oil return tank and a closed pressurizing oil cylinder; the oil return tank is connected with the main cylinder through a
reflux oil way connected into the main cylinder, and the oil return tank is connected with the pressurizing oil cylinder through an oil supply pipeline; the pressurizing oil cylinder is provided with a
piston which acts on the pressurizing oil supply pipeline to supply oil to the main cylinder, and oil inside the pressurizing oil cylinder is extruded into the main cylinder or oil inside the main cylinder is refluxed into the pressurizing oil cylinder through a circulating oil way through the
reciprocating motion of the
piston; and the oil supply
system is controlled by a plurality of
servo motor oil pump sets. The energy-saving high-efficiency closed-type pressurizing oil supply sectional material extruder disclosed by the invention can be used for effectively enhancing the
production rate, reducing the manufacturing cost of an integral
machine, saving the material and reducing the
oil consumption.