Mitsubishi Heavy Industries Plastic Technology Co., Ltd.

Mitsubishi Heavy Industries Limited

U-mhi Platech Co., Ltd.

Mitsubishi Heavy Industries Plastic Technology

Mitsubishi Heavy Industries Plastics Technology Co., Ltd.

Ube Machinery Corporation, Ltd.

Mitsubishi Heav Industries Plastic Technology Co., Ltd.

U-mhi Platec Co., Ltd.

Toshihiko Kariya

Naoki Toda

Munehiro Nobuta

Takeshi Yamaguchi

Kiyoshi Kinoshita

Satoshi Imaeda

Michitaka Hattori

Naoki Kato

Yasuo Okochi

Takehiro Irie

Ryoji Okabe

Saburo Fujita

Masaaki Ikarashi

Satoshi Miyagawa

Yasuaki Ozeki

Mamoru Kawasaki

Hiroto Matsushita

Shigeru Nozaki

Keijiro Sugiura

Masamitsu Saji

Masanori Takahashi

Kosuke Ikeda

Shinichi Takahashi

Koji Suzuki

Masahiro Bessho

Yoshinao Komatsu

Takashi Mizuno

Wataru Nishimura

Koji Kubota

Takashi Takii

Kazunori Kuga

Gen Hamada

Yoshio Shikase

Tetuo Uwazi

Manabu Kawahara

Yuji Suzumura

Hitoshi Onuma

Yuichi Hosoi

Shiki Matsuo

Nobuhiro Uchida

This injection molding method uses an injection molding machine for two-material molding, which comprises a first mold part that is provided with a cavity and a second mold part that is provided with a cavity and is arranged in tandem with the first mold part. This injection molding method comprises: a first molding step wherein a material is injected into the cavity of the first mold part and the material in the cavity is compressed; and a second molding step wherein a material is injected into the cavity of the second mold part. A pressure, which is generated in the second mold part by injecting the material into the cavity in the second molding step, acts on the first mold part, and a compressive force is applied to the material in the cavity in the first molding step.

Injection molding method and injection molding machine

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.

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

Provided is a mold opening/closing device that can prevent a ball screw shaft from reaching a risky speed while using a ball screw having a cantilever supporting structure. A mold clamping device according to the present invention is provided with: a ball screw having a ball screw shaft and a ball screw nut that meshes with the ball screw shaft; and a motor that drives the ball screw. One end of the ball screw shaft is supported by a fixation plate or a movable plate so as to be rotatable or non-rotatable, while being restricted in movement in an axial direction and thereby serving as a fixed end, and the other end thereof serves as a free end. Further, the mold clamping device is characterized in that a distance between the ball screw nut and the fixed end is shorter than a distance between the fixed plate and the movable plate.

Mold opening/closing device

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

Provided is a control device for an injection molding machine, capable of reducing the load on a user when re-displaying a previously displayed screen. The control device () for the injection molding machine () controls the display of display images on a display unit (). This control device () divides the display unit () into a first display area () and a second display area () and, if an instruction to scroll in the vertical direction is received when a first display image (P) is displayed in the first display area () and a second display image (P) is displayed in the second display area (), synchronously scrolls the first display image (P) and the second display image (P) whilst maintaining the relative positions of the first display image (P) and the second display image (P).

Control device for injection molding machine and screen display method

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

A mold-clamping device includes a fixed mold plate including a fixed mold; a movable mold plate including a movable mold; a hydraulic cylinder allowing the movable mold plate to approach or be separated from the fixed mold plate; a hydraulic pressure supply source supplying a hydraulic fluid to the hydraulic cylinder; and a control unit performing driving control on the hydraulic pressure supply source. The control unit includes a flow rate decrease control unit for deceleration for decreasing a flow rate of the hydraulic fluid according to a deceleration gradient set in advance when a movement of the movable mold plate is decelerated according to the deceleration gradient, and a flow rate increase control unit for controlling the flow rate of the hydraulic fluid to increase when the flow rate of the hydraulic fluid is decreased according to the deceleration gradient by the flow rate decrease control unit.

Mold-clamping device, injection-molding device, and method for opening and closing mold

An injection foam molding machine of the invention includes: a movable mold platen; a fixed mold platen; a mold fastening hydraulic cylinder that is provided at each of four corners of both mold platens; a tie bar that is driven by the hydraulic cylinder to fasten the molds; two sets of mold opening and closing actuators that drive the movable mold platen to move close to or away from the fixed mold platen; two sets of dedicated core back devices; and a control device that controls the two sets of mold opening and closing actuators and the two sets of dedicated core back devices, wherein the control device includes a dedicated core back program that simultaneously controls the two sets of mold opening and closing actuators and the two sets of dedicated core back devices during a foaming core back operation of moving the movable mold platen away from the fixed mold platen.

Injection foam molding machine

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 hydraulic oil storage device and an injection molding device are provided with a connection box that partitions a storage region of a sub-tank into a first region that includes a flow channel opening portion for a coupling tube and a second region other than the first region, in which the connection box is provided with an internal region communication portion that brings the first region and the second region into communication, and causes a pressure loss equal to the pressure loss of the coupling tube, or a pressure loss greater than that pressure loss, and a return tube is connected to the sub-tank so that the flow channel outlet faces the first region.

Hydraulic oil storage device and injection molding device

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

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Nagoya, Japan

Toshihiko Kariya