Pusan National University

Daejong Industry Co., Ltd.

Other

Tae Ho Lee

Myung Yung Jeong

Jin Hwa Ryu

Sang Uk Cho

Seung Hun Oh

Chang Seok Kim

A double-acting apparatus and method for manufacturing metal scrap compression materials, in which a variety of shapes of collected metal scrap are compressed into pieces having a standardized shape such that they can be directly loaded into a blast furnace, thereby enhancing productivity. Two compression chambers are disposed at both sides of a first compression cylinder such that metal scrap is loaded into the compression chambers. In particular, when one of first press plates moves forward inside a first compression space of one of the compression chambers, the other one of the first press plates moves backward and returns to an idle position.

Double-acting apparatus and method for manufacturing metal scrap compression materials

An apparatus and method for manufacturing a compressed lump of metal scrap that is capable of compressing various kinds of collected metal scrap into a standardized form so that the metal scrap can be directly introduced into a blast furnace. A through hole is formed in a compressed lump of metal scrap during manufacture of the compressed lump of metal scrap so that the compressed lump of metal scrap can be efficiently melted and the interior of the compressed lump of metal scrap can be observed.

Apparatus and method for manufacturing compressed lump of metal scrap

The present invention relates to a method for manufacturing a two-dimensional polymer optical waveguide, which is used for manufacturing a two-dimensional optical waveguide through simplified processes using a single imprint original master. The method includes: replicating a pattern through a first hot-embossing process on a thermoplastic polymer sheet using a single original master; forming a buffer layer on the surface of the replicated pattern; manufacturing a polymer mold having a cladding pattern on the other side without a buffer layer through a second hot-embossing process using the original master; replicating a pattern by molding the polymer mold out of an elastic material and forming an upper elastic mold and a lower elastic mold by vertically separating the elastic material; and forming middle cladding using the upper and lower elastic molds, filling regions on and below the middle cladding with core resin patterns, and performing a curing process after stacking upper and lower cladding to form a two-dimensional optical waveguide.

Method for manufacturing a two-dimensional polymer optical waveguide

The disclosure relates to a method for manufacturing a photoaligning integrated large area metallic stamp, which includes the following steps: making a unit device PLC mold pattern, and molding a unit PLC device pattern through a multistep imprinting method using the PLC mold pattern; heat treating the unit PLC device pattern to minimize scattering loss due to surface roughness; making a groove pattern for supporting an optical fiber; making an integrated PDMS mold for a unit device by aligning the unit PLC device pattern and the groove pattern; and repeatedly replicating the integrated PDMS mold for a unit device to make a large area PDMS pattern, and making a large area stamp through electroforming using the large area PDMS pattern.

Method for manufacturing photoaligning integrated large area metallic stamp, and method for manufacturing polymer optical device using same

A method of manufacturing a compressed lump of metal scrap involves forming a through hole in the metal scrap instead of drilling a finished compressed lump of metal scrap to form the through hole in the compressed lump of metal scrap. Friction and stress applied to the core are minimized while the through hole is formed in the compressed lump of metal scrap, which is compressed with high density, thereby minimizing damage to the core and thus minimizing a trouble occurrence rate.

Growing community of inventors

Busan, South Korea

Tae Ho Lee