US 5,424,026 A · Method and apparatus for compressively molding cushioning material made from recycled paper or pulp

Abstract

The invention provides an apparatus for compressively molding cushioning material using a quadrangular cylindrical molding box having an end side closed by a receiver mold, whereas the other end of said molding box receives supply of dry raw material consisting of fiberized paper or pulp by a volume corresponding to several times the actual volume of a molded body. A compressive mold inserted from the other end of the molding box is shifted to one-end side of the molding box to compress supplied raw material between a receiver mold. Simultaneously, a core member is retreated to a predetermined position of said one-end side in association with the shifting movement of the compressive mold. As a result, the core portion having thin thickness and the interior of the core member can securely be compressed and molded with even density.

Claims9

Dependent claims

A method of compressively molding cushioning material made from recycled paper or pulp by operating a receiver mold having a closed one end and a quadrangular cylindrical molding box having a retractable core penetrating a through-hole formed in said receiver mold, wherein said method comprises the sequential steps that follow;

a step to feed dry raw material consisting of fiberized waste paper or pulp to inner space of said molding box from the other end by a volume corresponding to plural times the volume of a molded body;
a step to insert a compressive mold from the other end of said molding box;
a step to shift said compressive mold to one side to compress said raw material between said compressive mold and said receiver mold;
a step to cause said core to retreat itself to a predetermined position at one end of said molding box in linkage with compressive movement of said compressive mold;
and
a final step to compressively mold said raw material by means of said molding box, said core, and said compressive mold.

3 more elements

An apparatus for compressively molding cushioning material made from waste paper or pulp comprising;

a receiver mold which is set to a quadrangular cylindrical molding box by way of closing one-end side and internally provided with a through-hole;
a core member which is disposed in said through-hole of said receiver mold by way of moving itself back and forth;
a compressive mold which is set to the other end side of said cylindrical molding box by way of moving itself back and forth;
a compressive-mold drive means which causes said compressive mold to movably protrude itself into said cylindrical molding box in order to compress supplied raw material;
a raw material supply means for supplying raw material into said molding box, wherein said supply means is set to the other end side of said molding box;
and
a core retreating means for causing said core member to retreat itself in linkage with said compressive-mold drive means.

4 more elements

Dependencies are inferred from the claim text.

Method and apparatus for compressively molding cushioning material made from recycled paper or pulp

Life of this patent

Method and apparatus for compressively molding cushioning material made from recycled paper or pulp

Life of this patent

Abstract

Claims9