MOLD PRESS FORMING DIE, AND METHOD FOR PRODUCING OPTICAL ELEMENT

• Main Authors: YONEDA YASUHIRO, YAMASHITA TERUO
• Format: Patent
• Language: English
• Published: 12.10.2006
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GLASS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a mold press forming die where an optical element in which optically required performance such as eccentric accuracy, wall thickness accuracy and surface accuracy is extremely high can be formed at high precision, and to provide a method for producing an optical element. SOLUTION: When a forming stock 50 is subjected to press forming between a lower die 20 and an upper die 10 slide-guided by a drum mold 30 so as to be relatively made close and separated to the lower die 20, by pressure contact means 40 provided so as to correspond to the upper and lower dies 10, 20 in such a manner that they are located on the same straight line parallel to the axial direction of the drum mold 30, the upper and lower dies 10, 20 are respectively pressed, and the upper and lower dies 10, 20 are respectively pressurized onto the same straight line parallel to the axial direction of the drum mold 30 at the inner circumferential face of the drum mold 30. COPYRIGHT: (C)2007,JPO&INPIT