Patent ID: 9492867
Filing Date: 2016-11-15
CPC Classification: B22F,B30B

Claim Text:
1. A forming die assembly for microcomponents, comprising: a forming die formed with a cavity, an outer punch hole including a small diameter hole connected to the cavity and a large diameter hole axially extending from the small diameter hole and having larger diameter than that of the small diameter hole, and a supply path for supplying a raw material with a metal powder and a binder having plasticity, the supply path being connected to the cavity so as to have a gate therebetween and being used for supplying the raw material into the cavity; and a punch configured to open and close the gate by reciprocatory sliding, and further configured to close the gate and compress the raw material in the cavity into a green compact by sliding in the direction of the cavity, wherein the outer punch comprises a small diameter portion in the vicinity of the end surface of the flange portion and a large diameter portion that axially extends from the small diameter portion and has a larger diameter than that of the small diameter portion, and the small diameter portion is closely fitted into the small diameter hole in a sliding condition and the large diameter portion is closely fitted into the large diameter hole in a sliding condition, and wherein the forming die is provided with a storage portion which is connected to the supply path and is used for storing the raw material, the storage portion being formed so that a plunger may be slidably inserted thereinto thereby supplying the raw material stored in the storage portion via the gate into the cavity.