Mitsubishi Heavy Industries Limited

Tachi-s Co., Ltd.

Mitsubishi Heavy Industries Plastic Technology Co., Ltd.

U-mhi Platech Co., Ltd.

Mitsubishi Heavy Industries Plastic Technology

Other

Ube Machinery Corporation, Ltd.

Naoki Toda

Toshihiko Kariya

Munehiro Nobuta

Takeshi Yamaguchi

Kiyoshi Kinoshita

Ryoji Okabe

Masahiro Bessho

Satoshi Imaeda

Keita Myochin

Masanori Takahashi

Atsushi Koike

Atsushi Suzuki

Kosuke Ikeda

Manabu Nomura

Masashi Inoue

Wataru Nishimura

Masakazu Takeda

Fumio Kondoh

Michitaka Hattori

Satoshi Miyagawa

Hirofumi Gouda

Takuto Ogawa

Shiki Matsuo

Gen Hamada

Osamu Muranaka

Hitoshi Onuma

Yuji Suzumura

Matsuo Sakuma

An impact absorbing device for a vehicle seat includes: a first base member; a second base member; and an impact absorbing member. The first base member rotatably supports the second base member. The impact absorbing member includes: a first fixing portion fixed to the first base member; a second fixing portion fixed to the second base member; and a deformable portion. The deformable portion is provided between the first fixing portion and the second fixing portion, and is configured to be bent by the rotation of the second base member. A distance between the first fixing portion and the second fixing portion in an undeformed state of the deformable portion has a value intermediate in a range of variation of the distance that varies depending on the bending of the deformable portion.

Impact absorbing device and vehicle seat

Provided is a vehicle seat having a pitching function, which not only has an assist function for bringing a main frame to a seated position or a forward tilted position, but also prevents the increase in the width and the increase in the weight of the seat. The vehicle seat includes: a base frame; a main frame disposed on the base frame and having a back frame and a cushion frame; and a link mechanism that allows the main frame to swing to the seated position and the forward tilted position with respect to the base frame. A third rotating shaft of the link mechanism is provided with a torsion spring that urges the main frame to swing from the forward tilted position to the seated position.

Vehicle seat

A headrest includes a frame made of metal, the frame includes a base plate supported by a headrest fixing device, and a cover plate disposed on an occupant head side of the base plate. The cover plate includes a cover panel portion, and a cover frame portion extending from an outer circumferential edge of the cover panel portion toward the base plate. The base plate includes a base panel portion, and a base frame portion extending from an outer circumferential edge of the base panel portion toward the cover plate, and fitted into the cover frame portion. A first part of the cover frame portion is joined to the base frame portion, and a remaining second part of the cover frame portion is enjoined to the base frame portion.

Headrest

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

A seat lock device includes: a striker installed in a vehicle body; and a lock unit provided on a seat back tiltable in a seat front-rear direction and holding the seat back in a standing state by locking the striker. The striker includes a base bracket attached to the vehicle body and a U-shaped rod locked by the lock unit, the base bracket has two support portions which respectively support end portions of the rod with a space therebetween in the seat front-rear direction, and at least one of the support portions deforms when a load exceeding a predetermined load is input to the rod so as to permit movement of the end portion of the rod supported by the support portion with respect to the base bracket.

Seat lock device

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

A vehicle seat includes: a seat cushion; a seat back; a frame; a headrest which is provided on an upper end portion of the frame; and a reclining portion wherein: the reclining portion includes: a link supporting the seat back at a swing end section; a sector gear rotated integrally with the link; a lock unit configured to move between an engaging position and a disengaging position for releasing from the engagement with the sector gear and configured to unrotatably hold the sector gear at the engaging position; and a biasing section biasing the lock unit toward the engaging position; and the lock unit includes: a pinion gear meshing with the sector gear at the engaging position and allowing rotation of the sector gear by rotating in a state of meshing with the sector gear; and a gear holding part configured to unrotatably hold the pinion gear.

In an injection molding method, using a heating cylinder having on the front end thereof a discharge nozzle, a single axis screw is rotatable inside the heating cylinder, a fiber-supplying device fills reinforcing fiber into the heating cylinder, and injection molding is performed while supplying the reinforcing fiber and the resin starting material separately and supplying the reinforcing fiber on the front side of the resin starting material. The method includes a plasticization process for obtaining a specified amount of a kneaded product by retracting the screw while rotating in the normal direction to melt the resin starting material and knead reinforcing fiber into the melted resin starting material, and an injection process for discharging the kneaded product from the discharge nozzle by advancing the screw. Reinforcing fiber is supplied into the heating cylinder in the injection process.

Injection molding method and injection molding device

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

A method for manufacturing a fiber-reinforced composite material of the present invention includes: the step (a) of placing a non-woven fabric N made of a reinforcement fiber in a movable mold; and the step (b) of moving the movable moldtoward a fixed moldto close the mold and then injecting a thermoplastic resin into the mold to obtain a molded article formed of the non-woven fabric N and the thermoplastic resin. The mechanical strength of the obtained fiber-reinforced composite material can be enhanced by applying an injection compression molding process as the injection molding process in the step (b).

Method for manufacturing a fiber-reinforced composite material

A plasticizing screw for injection molding according to the present invention is a plasticizing screw for injection molding that is installed in an injection molding machine which performs injection molding by plasticizing granular thermoplastic resin feedstock containing reinforcement fibers, and includes a shaft, a flight, and a mixer. The mixer is provided in plural stages in an axial direction, and the number of fins of the mixer of each stage increases toward a leading end side in the axial direction from a rear end side in the axial direction. Further, the protrusion height of each fin from the peripheral surface of the shaft is lower than the protrusion height of the flight from the peripheral surface of the shaft.

Plasticizing screw for injection molding and injection molding method using same

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

A plasticizing screw for injection molding according to the present invention is installed in an injection molding machine that performs injection molding by plasticizing thermoplastic resin feedstock containing reinforcement fibers, and includes a shaft, a main flight, and a sub-flight. The protrusion height of the main flight from the circumferential surface of the shaft is formed to be constant in at least an area in which the sub-flight is provided. The sub-flight includes a flat surface portion which is provided on the rear end side in a winding direction and in which a protrusion height from the circumferential surface of the shaft is lower than that of the main flight and is constant, and an inclined surface portion which is provided to extend continuously from a leading end in the winding direction of the flat surface portion and in which a protrusion height from the circumferential surface of the shaft gradually increases toward the leading end side in the winding direction and is less than the protrusion height of the main flight.

Growing community of inventors

Nagoya, Japan

Naoki Toda