公开(公告)号：US12053814B2

公开(公告)日：2024-08-06

申请号：US17045645

申请日：2019-09-10

Applicant: SHANDONG UNIVERSITY

Inventor： Cunsheng Zhang ,  Mingfu Liu ,  Guoqun Zhao ,  Liang Chen ,  Xinwu Ma

IPC: B21D43/00 ,  B21C23/04 ,  B21C35/02 ,  B21D28/24 ,  B21C25/02

CPC classification number: B21D28/243 ,  B21C23/04 ,  B21C35/023 ,  B21C25/02 ,  B21D43/003

Abstract: A method for making a profile with a micro-hole, in particular using a continuous composite extrusion process, comprises embedding, in a position in a matrix of the profile to be formed where a micro-hole is to be formed, a continuous wire having a shape and size consistent with that of the micro-hole; sawing a composite profile with the wire obtained by extrusion to a desired length; and removing the wire from the sawed composite profile using a predetermined physical or chemical method without changing the matrix of the composite profile so that the micro-hole of the predetermined size and shape is formed in the predetermined position in the profile. This method is simple, does not require any large, expensive, and sophisticated equipment, can produce continuous micro-holes of different specifications, and can be used in a wide variety of applications.