Kikusui Seisakusho Ltd.

Sanwa Kagaku Kenkyusho Co., Ltd.

Kikusui Seisakusyo Ltd.

Kenji Harada

Yuichi Ozeki

Keiji Shimada

Hitoshi Kusunoki

Kentaro Izumi

Fumiharu Ikai

Yuichi Sanwa Kagaku Kenkyusho Co Ltd Ozeki

Masanori Ikeda

Masaki Tanigawa

Takashi Inaba

Tomohiro Nishimura

Yasuhiro Nishioka

Masayuki Takada

Yuichi c/o Sanwa Kagaku Kenkyusho Co Ltd Ozeki

Kentaro c/o Sanwa Kagaku Kenkyusho Co Ltd Izumi

Kenji Tokuda

Yoshinori Kato

Makoto Morishita

The present invention provides a method for manufacturing a molding with a core by using compression molding means having upper and lower double-structured punches; the method comprising the steps of supplying molding material for the core and molding material for the outer layer respectively, the step of compression-molding the molding material for the core and/or the molding material for the outer layer, and the step of compression-molding the whole molding with a core, wherein: the step of supplying the molding material for the outer layer posterior to the step of supplying the molding material for the core is performed until a tip of the lower center punch finally takes a position protruding from a tip of the lower outer punch; and the step of compression-molding the whole molding with a core is performed with the tips of the lower center punch and the lower outer punch aligned with each other. This method can be expected to bring about the effect of enhancing the strength of a portion of outer layer forming the sidewall of the molding and/or the effect of allowing the molding material for the outer layer supplied after the step of supplying the molding material for the core to be led to under the temporary molding of the core thereby making it possible to manufacture a molding with a core through the molding material supply step performed twice.

Method of manufacturing a molding with a core

This invention provides a punch comprising: a center punch and an outer punch surrounding the outer periphery of the center punch, both of which being slidable and capable of compressing; and relative position restriction means for restricting a relative position of the center and outer punches, the relative position restriction means being configured to restrict a first position in which a punch tip of the center punch is protruded from a punch tip of the outer punch and a second position in which the punch tip of the center punch is substantially coincident with the punch tip of the outer punch, and being configured to fail to restrict a third position in which the punch tip of the center punch is retracted in the punch tip of the outer punch, as well as a rotary compression molding machine provided with the double-structured punch.

Punch, and rotary compression molding machine using the same

An compressive molding machine for powder material comprises an upper punch dust-proof unitthat surrounds a sliding partof an upper punchand that has expandable elasticity, and an upper seal that is arranged at a lower end portion of an upper punch holding boreholding the upper punchon a rotary turretand that holds the upper punchslidably and air-tightly, and is further provided with a communicating meansthat makes inside of the upper punch dust-proof unitcommunicate with outside of the upper punch dust-proof unitat a time when the upper punch dust-proof unitmakes an abutting contact with a portion near a circumference of the upper seal

Compressive molding machine for powder material

An apparatus is provided for effectively preventing the scattering and the like of powder material, by maintaining a completely sealed condition, from the supply of the powdery material and the discharge of the molded articles to the cleaning of the interior. A housingcomprising, connected via a piping system, a vacuum devicefor depressurizing said housinginterior; an atmosphere cut-off valveinstalled on said piping systemfor cutting off a piping interior atmosphere on said housingside from a piping interior atmosphere on the vacuum deviceside; a wetdown piping systemfor wetting, within the atmosphere on the housingside starting from said atmosphere cut-off valve, a compression molding mechanismas well as powdery material stuck to the inside of said housing; and an outside air introduction mechanisminstalled on said housingfor opening up an airtight condition of the housing.

Rotary powder compression molding machine

Growing community of inventors

Kyotanabe, Japan

Kenji Harada