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Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine

A technology of thermoplastic resin and fiber reinforcement, applied in the field of kneading, plasticizing device and extruder of fiber reinforced thermoplastic resin

Active Publication Date: 2020-05-08
JAPAN STEEL WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some issues need to be resolved or improved

Method used

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  • Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine
  • Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine
  • Kneading method for fiber-reinforced thermoplastic resin, plasticizing device, and extruding machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0049] as in figure 1 The molding apparatus 1A according to the first embodiment shown in (a) is constructed of a plasticizing apparatus for obtaining a fiber-reinforced thermoplastic resin by kneading a thermoplastic resin and reinforcing fibers. That is, the molding apparatus 1A according to the first embodiment includes: the twin-screw extruder 2A according to the present embodiment; A molding die 4 for manufacturing a product; a mold clamping device 5 for clamping the molding die 4; and a mechanical arm 7 for delivering the mass extruded from the twin-screw extruder 2A to the molding die 4. Intermediate molded articles.

[0050] Similar to the twin-screw extruder in the related art, the twin-screw extruder 2A according to the present embodiment also includes: a barrel 9 formed by connecting a plurality of barrel blocks 9a, 9b, . . . ; and inserted into the barrel 9 The two screw rods 11,11. A hopper 12 is provided upstream of the barrel 9, that is, on the rear end porti...

no. 2 example

[0060] The fiber-reinforced thermoplastic resin kneading method of the second embodiment is characterized in that when the reinforcing fibers are supplied to the plasticizing device as in the first embodiment, the reinforcing fibers are supplied from two or more different places. The kneading method according to the present invention can also be performed using an injection device of an injection molding machine serving as a plasticizing device.

[0061] image 3 A molding apparatus 1B, ie, an injection molding machine, according to the second embodiment is shown. The injection molding machine, ie the injection device 2B of the plasticizing device, comprises a barrel 9 and a screw 11 driven in the barrel 9 in the axial direction and in the rotational direction. A hopper 12 is provided at the rear end of the barrel 9, and a reinforcing fiber inlet 13B is provided near the tip end. From a position at or near the reinforcing fiber inlet 13B, the gap between the hole of the barr...

no. 3 example

[0067] as in Figure 5 The molding apparatus 1C according to the third embodiment shown in (a) includes: the twin-screw extruder 2C according to the present embodiment, which is configured to plasticize the thermoplastic resin, kneading with reinforcing fibers and extruding the thermoplastic resin and the reinforcing fibers as a bulk molded article to obtain a fiber-reinforced thermoplastic resin; a reinforcing fiber supply device 3 for supplying the reinforcing fibers to the twin-screw extruder 2C; A molding die 4 for obtaining a molded product by compression molding a bulk molded product; a mold clamping device 5 for clamping the molding die 4; 2C Robotic arm 7 for extruded bulk molded articles.

[0068] Similar to the twin-screw extruder in the related art, the twin-screw extruder 2C according to the present embodiment also includes: a barrel 9 formed by connecting a plurality of barrel blocks 9a, 9b, . . . ; and inserted into the barrel 9 The two screw rods 11,11. A hop...

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Abstract

The present invention provides a kneading method for a fiber-reinforced thermoplastic resin with which dispersibility of reinforcement fibers is enhanced and sufficient reinforcement fibers having a proper fiber length remain, and a fiber-reinforced thermoplastic resin plasticizing device and an extruding machine for carrying out the method. The kneading method comprises supplying a thermoplasticresin and reinforcement fibers into a cylinder of a plasticizing device, and rotating a screw to obtain a fiber-reinforced thermoplastic resin, wherein the size of a clearance between the bore of thecylinder and the screw is made different between an upstream side in the vicinity of a reinforcement fiber loading port and a downstream side, so that the clearance becomes larger from the vicinity ofthe reinforcement fiber loading port toward the downstream side compared with the upstream side.

Description

technical field [0001] The present invention relates to a method for obtaining a fiber-reinforced thermoplastic resin from a thermoplastic resin and reinforcing fibers such as carbon fiber and glass fiber by using a molding device (plasticizing device) including a barrel and a screw such as an injection device or an extruder of an injection molding machine a kneading method; and a fiber-reinforced thermoplastic resin plasticizing device and an extruder for carrying out the method. Background technique [0002] Molded articles formed of fiber-reinforced thermoplastic resins including reinforcing fibers such as carbon fibers and glass fibers and thermoplastic resins have great strength and can be used in various fields. A fiber-reinforced thermoplastic resin is obtained by performing kneading with a plasticizing device including a screw such as an injection device of an injection molding machine or an extruder. [0003] For example, to obtain a fiber-reinforced thermoplastic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/90B29B7/48B29C48/40B29C48/50B29C70/12B29K105/12
CPCB29B7/90B29B7/482B29B7/489B29B7/603B29C48/40B29C48/0011B29C48/0022B29C48/16B29C48/2886B29C48/297B29B7/007B29B7/48B29C70/12B29C48/402B29K2101/12B29K2105/12B29C2793/0027B29B7/905
Inventor 安江昭千叶英贵国弘大介西田正三辻和也藤田康文藤田一辉炭广幸弘
Owner JAPAN STEEL WORKS LTD
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