Mitsubishi Heavy Industries Limited

U-Mhi Platech Co., Ltd.

Mitsubishi Heavy Industries Plastic Technology Co., Ltd.

Minolta Camera Kabushiki Kaisha

Ube Machinery Corporation, Ltd.

Mitsubishi Heavy Industries Plastic Technology

Ngk Spark Plug Cc., Ltd.

Takeshi Yamaguchi

Toshihiko Kariya

Naoki Toda

Munehiro Nobuta

Kiyoshi Kinoshita

Satoshi Imaeda

Masanori Takahashi

Kosuke Ikeda

Ryoji Okabe

Masahiro Konishi

Kazuho Tatematsu

Yuji Suzumura

Hitoshi Onuma

Provided is an injection molding method for resin that contains reinforcing fiber, the method being capable of easily eliminating uneven distribution of added components. The injection molding method is provided with: a plasticizing step for supplying resin pellets P and added components to a cylinder equipped with a screw, which has a rotating axis as the center is capable of rotating normally and in reverse, and generating molten resin by rotating the screwin the normal direction; and an injecting step for injecting the molten resin M comprising the added components into a cavity. In the plasticizing step, a reverse rotation operation for reversing the rotation of the screwis performed or a screw-stopping operation of stopping the normal rotation of the screwis performed with a prescribed timing and for a prescribed period.

Injection molding method and injection molding machine

Provided is a screw that is for use in an injection molding machine and that makes it possible to benefit from the kneading effect of a multi-start screw while minimizing the received friction resistance. The screw for an injection molding machine is provided with a first stageon the upstream side and a second stageon the downstream side. The screw for an injection molding machine is characterized in that: the first stageis provided with a compression sectioncomprising a main scraperand an auxiliary scraperhaving a smaller outer diameter than the main scraper; and the second stageis provided with a multi-start screw section, said multi-start screw section being provided on the upstream side and comprising a plurality of scrapers, and a fin kneading sectionprovided downstream from the multi-start screw section.

Screw for injection molding machine, injection molding machine, and injection molding method

There is provided a screw of an injection molding machine that can eliminate uneven distribution of reinforcing fibers without giving an excessive shear force to the reinforcing fibers. A screw is provided inside a heating cylinder of an injection molding machine to which a resin pellet is fed on an upstream side in a conveyance direction of resin and to which reinforcing fibers are fed on a downstream side therein, and includes: a first stage at which the resin pellet which is fed is melted; and a second stage that continues to the first stage, and at which molten resin and the reinforcing fibers are mixed with each other. A second flight provided at the second stage includes: a large-diameter flight with a relatively large outer diameter; and a small-diameter flight with a relatively small outer diameter.

Screw, injection molding machine, and injection molding method

An injection molding method includes: a plasticizing process of feeding a resin pellet and additive components to a heating cylinder including a screw that can rotate around a rotation axis and can advance and retreat along the rotation axis, and generating molten resin by rotating the screw in a normal direction; and an injection process of injecting to a cavity the molten resin containing the additive components. In the plasticizing process, retreat operation of forcibly retreating the screw is performed at a predetermined velocity by a predetermined stroke or a predetermined time.

Injection molding method

The injection molding apparatus of the present invention includes: a heating cylinder; a screw that is provided rotatably in an inner portion of the heating cylinder; a resin feed hopper that feeds a resin pellet; and a fiber feed device that is provided ahead of the resin feed hopper and feeds reinforcing fibers into the heating cylinder. The screw includes a first stage that is located on a rear side, and in which the resin pellet is melted, and a second stage that is located on a front side, and in which the melted resin pellet and the reinforcing fibers are mixed, and a lead of a second flight provided in the second stage is larger than a lead of a first flight provided in the first stage.

Injection molding apparatus and injection molding method

The resin injection molding method of the present invention is a method for molding resins inside a cavity formed within a mold. The method comprises injecting resins into the cavity through a plurality of paths installed so as to be openable and closable and optionally maintaining the resin inside the cavity at a pressure; closing each of the plurality of paths such that the resins injected from each path converge, there being a time difference between when a first path and a second path of the plurality of paths are closed; and solidifying at least the resin which is injected from the path closed earliest with a crystallinity greater than or equal to a predetermined crystallinity degree.

Resin injection molding method

The injection molding method for injecting a resin into a cavity formed within a mold is provided with a heating step in which the temperature of a cavity surface forming the cavity of the mold is heated to a temperature equal to or higher than a heat distortion temperature of the resin and an injection step in which after the heating step, during a decrease in temperature of the cavity surface of the mold, the resin is injected into the cavity.

Injection molding method, molded-article producing method, and injection molding apparatus

A ceramic heaterincludes a silicon nitride ceramic substrateand a resistance-heating memberembedded in the silicon nitride ceramic substrate. The silicon nitride ceramic substratecontains oxygen derived from a sintering aid at an average concentration of 0.4&#x2013;3.2% by weight in a surface layer portion extending from the surface thereof to a depth of 1 mm. The ceramic heatercan be manufactured by firing through hot pressing. A firing jig for use in a firing process has an SiC&#x2014;C composite layer which is formed therein along the surface of cavities thereof while having a predetermined depth as measured from the cavity surface.

Ceramic heater and method for manufacturing the same

A paper feeding device having a supporting member for supporting recording paper thereon, and at least one width regulating member which is provided on the supporting member and freely movable in a direction perpendicular to a paper transporting direction. A slide portion provided on the width regulating member is adapted to slide along a guide surface formed on the supporting member. A width regulating surface on the width regulating member intended to contact with the recording paper is so disposed as to deviated in the transporting direction from the slide portion. When a recording paper in process of conveyance happens to swerve and pressingly contact with the width regulating surface, the width regulating member is made to generate moment and is consequently prevented from sliding due to the swerve of the recording paper.

Growing community of inventors

Nagoya, Japan

Takeshi Yamaguchi