Kabushikikaisha Matsui Seisakusho

Kyowa Hakko Kogyo Co., Ltd.

Junji Nakagawa

Kiyoshi Morimoto

Akikazu Iwamoto

Masuo Moriyama

Kazunari Hanaoka

A drying apparatus under reduced pressure for a plastic molding material. The apparatus comprises a drying hopper provided with an airtight material charge valve capable of containing gas therein at its upper portion and a material discharge valve at its lower portion, and connected to a vacuum pump via vacuum piping, a heating means of thermal conduction type provided in the drying hopper, and a plastic material adherence preventing means in which a gas charge port connected to a gas tank storing gas via a gas changeover valve is provided between the material discharge valve and the drying hopper and stored gas is fed into the drying hopper by opening the gas changeover valve after predetermined time, thereby preventing adherence of plastic molding material.

Drying apparatus under reduced pressure for plastic molding material

High density pneumatic transport system for use in powdered or granular

An improved method and related system for pneumatically transporting powdered or granular materials stored in an airtight storage container to a collector through a transport pipe in the form of a lengthy column in high density and at a slow speed by the use of pressurized gas. The method of the invention comprises the steps of stopping feeding of the pressurized gas when the whole of the powdered or granular materials corresponding to a final batch contained in the storage container are sent into the material transport pipe, simultaneously discharging the internal pressure of the storage container through a gas decompressing means, inserting a transport plug from the base end of the material transport pipe, and carrying forward the transport plug at a slow speed by feeding pressurized gas from the base end of the transport pipe.

High-density pneumatic transport method for use in powdered or granular

Growing community of inventors

Hirakata, Japan

Junji Nakagawa