| MITSUBISHI HEAVY INDUSTRIES PLASTIC TECHNOLOGY Co., Ltd. Patent applications |
| Patent application number | Title | Published |
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| 20120119403 | MOLDING METHOD AND METHOD FOR MANUFACTURING MOLDING PRODUCT - The molding method is composed of a primary injection molding step for molding a transparent resin at a first mold ( | 05-17-2012 |
| 20120087999 | INJECTION MOLDING MACHINE FOR TWO-MATERIAL MOLDING - It is an object to prevent dies from interfering with each other when the dies are closed and effectively prevent overshoot of cavity temperature while efficiently performing heating of the dies. In an injection molding machine for two-material molding including two sets of a first injecting unit and a second injecting unit that respectively plasticize different resin materials and inject and fill the resin materials, prior to performing injection molding on the first injecting unit side on a secondary side, after injection molding on the second injecting unit side on a primary side, heating of the dies is started before 180-degree rotation of a rotary die plate is completed. After the start of heating, until the 180-degree rotation of the rotary die plate is completed, i.e., die closing is performed, die temperatures are maintained within a temperature range set higher than die temperatures during the heating start and lower than die temperatures during injection. | 04-12-2012 |
| 20110210461 | INJECTION MOLDING DEVICE AND INJECTION MOLDING METHOD - An injection molding device is provided with a mold, an injection unit equipped with an injection screw that is displaceably configured such that a molten resin is filled into a cavity by forward movement to perform plural injection operations including at least a filling operation and a pressure keeping operation by displacing the injection screw, a position sensor for detecting the position of the injection screw, a temperature sensor capable of measuring the temperature of the vicinity of the cavity of the mold, a temperature adjustment unit capable of adjusting the temperature of the mold by heating or cooling the mold, a control unit for controlling the displacement of the injection screw and the temperature of the mold and determining plural switching timings of the injection operations on the basis of the position of the screw, and a display unit for displaying an image. The control unit creates a temperature waveform of the vicinity of the cavity based on an input from the temperature sensor and displays a first correlation diagram showing the correlation between the temperature waveform and a predetermined variation corresponding to the change of the temperature waveform and showing at least part of the determined plural switching timings of the injection operations on the display unit. | 09-01-2011 |
| 20110115120 | MOLD TEMPERATURE CONTROL CIRCUIT OF INJECTION MOLDING DEVICE AND METHOD FOR DISCHARGING HEATING MEDIUM - In a mold temperature control circuit of an injection molding device, such a molding cycle is repeated that, prior to injection of a resin, a heating-use medium is returned to molds and heated to a temperature suitable for resin injection, after injection of the resin, the heating-use medium is switched to a cooling-use medium, thereby the cooling-use medium is returned to the molds and cooling is conducted to give a temperature equal to or lower than a temperature at which the resin is solidified. In the mold temperature control circuit of the injection molding device, a junction piping is able to commonly use the respective supply pipings of the heating-use medium, the cooling-use medium and the scavenging compressed air to the molds and the respective discharge pipings thereof, and there is provided mold bypass piping coupling the supply-side junction piping of the heating medium with the discharge-side junction piping, a mold bypass on-off valve, a passed heating medium sensor, a mold-temperature adjusting control device which stores a mold temperature determination program and a passed heating medium determination program. | 05-19-2011 |
| 20110052742 | MOLD CLAMPING APPARATUS - There is provided a mold clamping apparatus that can prevent a molding material from spouting from a split surface of a mold even if in-cavity resin pressure causes offset of a mold opening force, and can extend the life of the mold. The mold clamping apparatus includes a control device that estimates a mold opening force by mold internal pressure for molding with mold internal pressure being asymmetrical with respect to a center of a mold block, determines a mold clamping hydraulic value applied to each time bar correspondingly to the estimated mold opening force, and distributes hydraulic pressure supplied to each tie bar so that the determined mold clamping hydraulic value is reached. | 03-03-2011 |
| 20110049762 | INJECTION MOLDING MACHINE AND INJECTION MOLDING METHOD - An injection molding machine is provided with a mold forming a cavity into which a resin is injected, a liquid supplying device which supplies a liquid continuously to an internal flow channel of the mold during a preparation period prior to injection of the resin and an injection period in which the resin after the preparation period is injected, an electricity supplying device which supplies electricity to an electric heater arranged on the mold at least during a part of the preparation period, thereby heating the mold, and a controller which carries out a predetermined procedure for making different a temperature of a liquid in the internal flow channel between the preparation period and the injection period. | 03-03-2011 |
| 20100244314 | INJECTION MOLDING MACHINE FOR TWO-MATERIAL MOLDING AND METHOD OF CONTROLLING THE SAME - In an injection molding machine for two-material molding including two sets of injection units | 09-30-2010 |
| 20100237525 | INJECTION FOAM MOLDING MACHINE AND METHOD OF INJECTION FOAM MOLDING - An injection foam molding machine according to the present invention includes: a clamping unit that moves a movable die plate | 09-23-2010 |
| 20090053347 | MOLDING MACHINE SYSTEM - Provided is a molding machine system enabling a free setting of execution timings of respective steps in a molding cycle of heating of a mold, injection and pressure holding of a molding material, cooling of the mold, etc. The molding machine system repeating a series of molding cycle comprises three temperature sensors arranged at predetermined places of a mold, a change-over valve unit having a heat medium channel by which heating medium from a heating unit, cooling medium from a cooling unit and pressurized air are changed over to be supplied into and recovered from the mold and a molding control means, provided on the change-over valve unit, having a temperature judging program judging respective detected temperatures of the three temperature sensors to give a judgement result and a timer to give a time set signal. A molding operation control is carried out by combining the judgement result with the time set signal and enables an arbitrary supply control of the heating medium, cooling medium and pressurized air to be supplied into the mold and an arbitrary supply control of the molding material to be supplied into the mold. | 02-26-2009 |
