Injection molding machine for bimaterial molding and method of controlling same

An injection molding machine and dual-material technology, which is applied to the injection molding machine for dual-material molding and its control field, can solve the problems of difficult to rotate the central axis, difficult to replace the mold, sticking of the bearing part, etc., so as to avoid collision and prevent the mold from being damaged. Effect

Active Publication Date: 2013-06-19
MITSUBISHI HEAVY INDS PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the rotating die is supported on a member protruding from the fixed plate so that it can rotate freely and move freely toward the movable die side. However, since it is a cantilever member, it does not have a sufficiently rigid structure. Accurately supports heavy rotating molds
Since the rotating disk is added between the strokes of the fixed disk and the movable disk of the conventional molding machine, it is difficult to obtain a sufficient movement stroke of the movable disk and the rotating disk for the rotary operation of the rotary mold with a large lateral width.
In addition, the parts extending from the fixed plate that support the rotating mold are divided into upper and lower parts, and must be installed on the fixed plate separately up and down. It is difficult to make the upper and lower rotation centers concentric, and problems such as adhesion and wear of the bearing part may occur when the rotating mold rotates.
In addition, in order to reduce the weight of the rotating mold, the two side molds and the mold rotating shaft are integrated, so it is difficult to replace the mold

Method used

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  • Injection molding machine for bimaterial molding and method of controlling same
  • Injection molding machine for bimaterial molding and method of controlling same
  • Injection molding machine for bimaterial molding and method of controlling same

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0075] The injection molding machine for bi-material molding of this embodiment has two cavities formed by a mold for a movable platen, a mold for a fixed platen, and a mold provided on both sides of the rotary platen between the two platens. Different types of resins are injected separately, double injection is performed by rotating the rotary die plate 180 degrees, and the two materials are integrally molded. Among them, it is easy to set the movement of the movable die plate and the rotary die plate, and the drive of the rotation of the rotary die plate. Controlled electric drive unit.

[0076] Next, the first embodiment will be described with reference to the drawings.

[0077] figure 1 This is a schematic plan view of the injection molding machine for dual-material molding of the present invention. figure 2 is to indicate figure 1 Diagram of the rotation action of the rotary die plate of the injection molding machine for bi-material molding. image 3 Yes figure 1 Si...

no. 2 approach

[0131] Next, a second embodiment of the present invention will be described. The difference between the second embodiment and the first embodiment is as follows: Figure 7 As shown in the schematic plan view of the injection molding machine 30 for bi-material molding, the reversing table 7 is provided with a servo motor A ( 21 ) and a ball screw for driving the movable platen opening and closing unit 46 of the movable platen 3 . The rest of the support base 26 of the lever shaft 47 is the same as that of the first embodiment, so the description of other structures is omitted.

[0132] The advantage of this second embodiment is that the ball screw shaft 47 can be shortened, so that the critical speed of the ball screw shaft 4 can be increased, and the opening and closing speed of the movable die plate 3 can be increased. In addition, since the ball screw is directly connected between the rotary die plate 9 and the movable die plate 3, it is not necessary to detect and control ...

no. 3 approach

[0134] Next, a third embodiment of the present invention will be described. The difference between the second embodiment and the first embodiment is as follows: Figure 8 As shown in the schematic side view of the rotary table plate, the rotary table plate rotation unit 50 is composed of the servo motor C ( 41 ) mounted on the reversing table 7 , the pinion gear 53 mounted on the servo motor C ( 41 ), and the pinion gear 53 The meshing rotary plate 9 is integrally provided with a large gear 52 and an annular toothed belt 54 wound around the pinion 53 and the large gear 52, and is a rotary drive that makes the rotary plate 9 rotate half a circle in the forward and reverse directions. The unit is the same as that of the first embodiment except for this, so the description of other structures is omitted.

[0135] According to the present embodiment, there is an advantage in that it is not necessary to directly abut the large gear 52 and the pinion 53, and the distance between th...

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Abstract

In an injection molding machine for two-material molding including two sets of injection units 11, 12 that plasticize different resin materials and injection-fill the materials, a mold clamping unit is a hydraulic mold clamping unit that mold-clamps three sets of die plates 2, 3, 9 simultaneously, a movable die plate opening and closing unit 14 is a movable die plate opening and closing unit driven by an electric motor, a rotational die plate opening and closing unit 15 is a rotational die plate opening and closing unit 14 driven by an electric motor, and a rotating unit for the rotational die plate 9 is a rotation driving unit driven by an electric motor attached to a reversal pedestal 7.

Description

technical field [0001] The present invention relates to the following injection molding machine for dual-material molding: from two sets of injection units to the two sides of the mold of the movable platen, the mold of the fixed platen, and the two sides of the rotary platen set between the two plates, respectively. The two cavities formed by the mold are injected with different kinds of resins, and the rotary mounting plate is rotated 180 degrees for two-layer injection, and the two materials are integrally molded, especially when it comes to setting the moving speed of the movable mounting plate and the rotating plate that is easy to control. A moving unit, and an injection molding machine for bi-material molding of the rotating unit that can easily control the rotating speed of the rotating die plate, and a method for controlling the moving speed and the rotating speed. Background technique [0002] An example of a molding method for obtaining molded articles of differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/12B29C45/16B29C45/68B29C45/76
CPCB29C2945/76605B29C2945/76936B29C45/68B29C2945/76866B29C2945/76598B29C2045/1792B29C45/045B29C45/1628B29C2945/76337B29C45/80B29C2945/76314
Inventor 加藤直纪松下博乙大河内康夫大关泰明佐治政光苅谷俊彦
Owner MITSUBISHI HEAVY INDS PLASTIC TECH
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