Ube Machinery Corporation, Ltd.

Kazuaki Miyamoto

Akio Okamoto

Toshikazu Iwamoto

Yuichiro Fukuda

Fumihiko Shimizu

Etsuji Ota

Yuuichirou Arima

Atsushi Shinada

Yuuichirou Fukuda

A control device of an injection molding machine, the injection molding machine including: a mold clamping device that advances and retracts a movable mold with respect to a fixed mold; and an injection device that injects and fills a molten material into a cavity formed between both the molds, the control device including: a display unit that displays a setting screen for setting molding conditions of the injection molding machine; and a setting unit that sets the molding conditions based on information displayed on the setting screen.

Control device of injection molding machine and method of setting mold clamping force

A mold clamp control method for an injection molding machine having a toggle-type mold clamping mechanism. The mold clamp control method includes: a low-pressure mold clamping step that performs position hold control by which a crosshead is held in a set holding position in a state where a toggle link has been bent, when injection-filling is started; and a compression-press step that performs speed and position control by which the crosshead is advanced toward a set advancement position from the set holding position in a state where a first output upper limit value has been provided to a driving section. Advancement of the crosshead is continued in at least part of the compression-press step in a state where a generated output of the driving section is maintained at the first output upper limit value.

Mold clamp control method for injection molding machine having toggle-type mold clamping mechanism

The present invention comprises: a base layer molding step that injection-fills a mold cavity with a base layer resin to mold a base layer; a first expansion step that causes the volume of the mold cavity to expand to a specified quantity such that a certain space is formed between an outer surface of the base layer molded by the base layer molding step and an inner surface of the mold; a first injection-filling step that injection-fills the space formed by the first expansion step with a first resin; a second expansion step that, after the start of the first injection-filling step, causes the mold cavity to expand to a specified quantity such that the space is expanded; and a second injection-filling step that, after completion of the first injection-filling step and after the start of the second expansion step, injection-fills a second resin into the first resin.

Method of manufacturing sandwich molded product, injection molding machine, and sandwich molded product

An injection molding method comprising: a mold clamping step of clamping a first mold and a second mold to form a mold cavity; a first injection filling step of injecting a foamable molten resin into the mold cavity to fill an interior of the mold cavity with the foamable molten resin, after completion of the mold clamping step; a mold cavity expansion step of expanding the mold cavity by a specified quantity to cause the foamable molten resin to foam, after the start of the first injection filling step; and a second injection filling step of pouring a molten resin or gas into the foamable molten resin within the mold cavity, after the completion of the first injection filling step, and after the start of the mold cavity expansion step.

Injection molding method

A multilayer molding apparatus, comprising: a fixed platen; a movable platen; an intermediate platen positioned between the fixed platen and the movable platen to be movable in the direction to come close or be opened, and having a surface facing the fixed platen, a surface facing the movable platen, and a housing space that goes therethrough from the surface facing the fixed platen to the surface facing the movable platen; and a rotary platen rotatably supported by the intermediate platen inside the housing space of the intermediate platen, and having at least one pair of parallel surfaces facing the fixed platen and the movable platen, wherein at least one of the surfaces of the intermediate platen facing the fixed platen and the movable platen is a mold mounting surface on which a mold can be mounted directly or indirectly.

Multilayer molding apparatus and injection molding method

A multilayer-molding method includes the steps of mixing at least one thermoplastic resin selected from a plurality of types of thermoplastic resins with a bubble-nucleating agent and a foaming gas, injecting the plurality of types of thermoplastic resins into a mold cavity such that the thermoplastic resins are layered in the mold cavity, and then, after increasing the volume of the mold cavity, foaming the at least one thermoplastic resin mixed with the bubble-nucleating agent and the foaming gas. The multilayer-molding method is characterized in that the foaming gas is supplied at a pressure of 0.1 MPa or more but less than 1.0 MPa to at least one injection-molding machine selected from a plurality of injection-molding machines, and that the thermoplastic resin plasticized in the injection-molding machine is mixed with the foaming gas.

Method for multilayer molding of thermoplastic resins and multilayer molding apparatus

While a second layer resin is being charged, a movable platen is moved backward to reach a given movable platen position (S) to enlarge the capacity of a second cavity. After the completion of charging of the resin, a toggle mechanism is promptly driven to reduce the second cavity capacity to reach a given movable platen position (S), and after the lapse of a given time, the toggle mechanism is driven again to enlarge the second cavity capacity to reach a given movable platen position (S). Thus, a high quality multilayer injection molded article which has small variations in the wall thickness, dimension, and mass and which is free from deformation or warpage can be stable obtained.

Resin multilayer injection molding method

An injection-foaming method for a thermoplastic resin comprising using an injection unitprovided with a hopper, a plasticizing cylinderand a screw, and a moldhaving a mold cavityof changeable capacity; filling the mold cavitywith a foaming-agent-containing melted resin injected from the injection unit; and then enlarging the mold cavityfor allowing the foaming-agent-containing melted resin to expand, wherein inclusion of a foaming agent into a thermoplastic resin is done by using a mixture of a foam nucleating agent and a foaming gas as foaming agent, feeding the mixture to hopperor plasticizing cylinderand screwof injection unitat a pressure of 0.1 MPa or more and less than 1.0 MPa, and contacting the mixture with a pre- or post-plasticized thermoplastic resin present in hopperor plasticizing cylinderand screw

Method for injection expansion molding of thermoplastic resin

A method for injection foaming molding of a thermoplastic resin includes the steps of (1) injecting the foaming-agent-containing plasticized resin from an injection apparatusto fill a mold cavity, (2) releasing a clamping force of a moldimmediately after the foaming-agent-containing plasticized resin is injected and filled into the mold cavity, so as to release the pressure of the foaming-agent-containing plasticized resin in the mold cavity, (3) maintaining the pressure-released state of the foaming-agent-containing plasticized resin in the mold cavityfor a predetermined period of time, (4) expanding the mold cavityto foam the foaming-agent-containing plasticized resin, and (5) cooling and maintaining the foaming-agent-containing plasticized resin while the mold cavityis in the expanded state.

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Ube, Japan

Kazuaki Miyamoto