Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
POWDER MOLDING PRESS METHOD OF GREEN COMPACT FOR CUTTING INSERT, AND POWDER MOLDING PRESS DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/221497
Kind Code:
A1
Abstract:
Provided is a powder molding press method of a green compact for a cutting insert that has portions of differing thicknesses in an insert center line PO direction between upper and lower surfaces, wherein: a lower punch (112, 212) is inserted from below into a hole (111A, 211A) in a die (111, 212); in that state, a raw material powder (R) is filled into a molding space (Q), and preliminary molding is performed by inserting from above the molding space (Q) a preliminary molding punch (114, 214) that has a preliminary molding surface (114B, 214B) in a shape differing from a shape that is an inversion in surface symmetry of the upper surface of the green compact for the cutting insert, e.g., where the orientation of the uneven surface is opposite; or, the raw material powder (R) is further re-filled so that the raw material powder (R) is filled in a greater quantity in the thick sections that are thick in the direction of the insert center line (PO) between the upper and lower surfaces than in the thin section, relative to the state before the preliminary molding; and thereafter, a final mold upper punch is inserted from above the molding space (Q) and the raw material powder (R) undergoes power molding pressing.

Inventors:
OONO KENTARO (JP)
HOTTA MASARU (JP)
GOUDA TOMOTSUGU (JP)
SHIBUYA YOSHITOMO (JP)
Application Number:
PCT/JP2018/020499
Publication Date:
December 06, 2018
Filing Date:
May 29, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
B22F3/035; B22F7/00; B30B11/00
Domestic Patent References:
WO2008114827A12008-09-25
Foreign References:
EP3015196A12016-05-04
EP2933041A12015-10-21
JP2000326100A2000-11-28
JP2017105548A2017-06-15
JP2017105549A2017-06-15
JPS5715688B21982-04-01
Other References:
See also references of EP 3636368A4
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
Download PDF: