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Injection molding device and injection molding method

A technology of injection molding and injection molding, which is applied in the field of injection molding devices, can solve problems such as repeated trials and designer experience, and achieve the effect of improving stability and quality

Active Publication Date: 2011-08-31
MITSUBISHI HEAVY INDS PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in conventional injection molding equipment, there is a problem that a lot of trial and error and designer's experience are required in order to optimize the adjustment of the mold temperature and the combination of the molding process.

Method used

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  • Injection molding device and injection molding method
  • Injection molding device and injection molding method
  • Injection molding device and injection molding method

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0044] figure 1It is a schematic diagram of an injection molding device equipped with a hydraulic injection unit capable of implementing the molding method according to the first embodiment of the present invention and a mold heating and cooling control circuit, figure 2 yes means figure 1 A block diagram of the control elements of the mold temperature and mold internal pressure control device included in the mold heating and cooling control circuit, image 3 is used figure 1 Schematic diagram of the mold heating and cooling control loop for injection molding. It should be noted that the mold shown in the illustration is in a state where a cavity has been formed.

[0045] exist figure 1 Among them, an injection molding apparatus 1 includes a movable mold 2 and a fixed mold 3 for obtaining a molded product of a desired shape. The movable mold 2 is fixed to a movable platen (not shown) of the mold clamping device, and the fixed mold 3 is fixed to a fixed platen (not sh...

no. 2 approach

[0094] Figure 5 It is a diagram showing an example of the display of the image display device 50 according to the second embodiment of the present invention, and is a diagram illustrating the first correlation map 81 . Components that are the same as those in the above-mentioned structure are denoted by the same reference numerals and description thereof will be omitted.

[0095] Figure 5 The shown first correlation graph 81 is a graph showing the relationship between the mold temperature TM and time t in one molding cycle, and shows the set value of the switching time (A at the start of filling to D at the end of the holding pressure) together with the correlation. . In this first correlation diagram 81 , the time when the temperature rise of the mold starts is set as the initial time t0.

[0096] According to this display structure, the relationship between the mold temperature TM and the injection operation can be clearly observed, so it is easy to study the factors of...

no. 3 approach

[0103] Figure 7 It is a diagram showing an example of the display of the image display device 50 according to the third embodiment of the present invention, and is a diagram showing a configuration in which the first correlation diagram 91 and other types of correlation diagrams are displayed side by side so that the diagrams can be compared. In addition, the same code|symbol is attached|subjected to the structural element similar to the above-mentioned structure, and description is abbreviate|omitted.

[0104] Specifically, the first correlation diagram 91 , the fourth correlation diagram 84 , and the second correlation diagram 82 are displayed from the bottom to the top of the image display device 50 .

[0105] The first correlation diagram 91 is substantially the same as the first correlation diagram 81 , but differs in displaying the heating target temperature TM1 and the cooling target temperature TM2 of the molds 2 and 3 stored in the control device 20 .

[0106] The s...

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Abstract

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 amount of change 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.

Description

technical field [0001] The present invention relates to an injection molding device and an injection molding method for improving the flow of resin inside the mold by heating the mold before injection of molten resin. Background technique [0002] In general, the molding cycle in injection molding generally includes: a mold clamping process of combining divided molds to form a cavity; a filling process of filling molten resin with an injection part having a screw; a pressure holding process; and cooling of the molten resin Process; mold opening process for separating molds; process for taking out molded products. In the above-mentioned molding process, the operation of the injection part during filling, pressure holding, and cooling (injection operation) affects the quality and productivity of molded products. Therefore, in an injection molding apparatus that automatically performs the above-mentioned molding process, it is important how to determine control conditions such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76B29C45/73B29C48/92
CPCB29C45/762B29C2945/76257B29C2945/76187B29C2945/76876B29C2945/76083B29C2045/7606B29C2945/7604
Inventor 苅谷俊彦服部充孝野崎滋今枝智
Owner MITSUBISHI HEAVY INDS PLASTIC TECH
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