Patent ID: 6013214
Filing Date: 2000-01-11
Classification: B01D,D21J

Abstract:
A method for manufacturing a filter element, the method comprising the steps of:sucking a water slurry containing filter material through a first molding die member having a number of suction openings formed therein and having a plurality of concavities and convexities formed in an outer peripheral surface thereof;causing the filter material to be accumulated between the first molding die member and a second molding die member disposed to oppose the concavities of the first molding die member and disposed at a first position spaced by a prescribed distance from the outer peripheral surface of the first molding die member so that a molded body having a number of concavities and convexities on an outer peripheral surface thereof is formed on the outer peripheral surface of the first molding die member,wherein the causing step disposes, during a time period from a start of the suction of the slurry to a point in time when the filter material is accumulated to a prescribed thickness on the outer peripheral surface of the first molding die member, the second molding die member at a second position more remote from the outer peripheral surface of the first molding die member than the first position, to thereby cause the filter material to be accumulated to the prescribed thickness on the outer peripheral surface of the first molding die member as the water slurry is sucked through the first molding die, and thereafter moves the second molding die member from the second position to the first position and further causes the filter material to be accumulated between the first and the second molding die members to thereby form the number of the concavities and convexities on the outer peripheral surface of the molded body.