JPS59227409A - Preparation of metal fiber reinforced plastic material - Google Patents

Abstract

PURPOSE:To form a metal fiber reinforced composite plastic material containing a long metal fiber and excellent in mechanical strength, by continuously supplying the long metal fiber from the intermediate part of a heating cylinder. CONSTITUTION:A plastic stock material supplied from a plastic stock material supply hopper 16 is melted while compressed and transferred by the rotation of a screw 12. The long metal fiber 23 supplied from a metal fiber supply hopper 17 is sent into the molten plastic stock material and kneaded with the plastic stock material while shortly sheared by strong shearing force caused by the rotation of the screw 12 and the resulting compound is extruded from a lead end extrusion orifice 25. On the other hand, a noxious volatile component is sucked and removed from a volatile component removing port 15 by a vacuum pump 18. As mentioned above, by continuously supplying the long metal fiber continued in a longitudinal direction, it can be stably and quantitatively supplied without generating bridging in the hopper and the supply amount thereof can be also easily controlled. In addition, by mixing the metal fiber in a long state, a large amount of a metal fiber reinforced plastic material having excellent strength can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [1] Nuclear technology field The present invention relates to a method for continuously producing a metal fiber-containing plastic material by mixing metal fibers into a plastic raw material.

[2] Conventional technology As a method for manufacturing digrastic materials containing metal fibers, short metal fibers are mixed with plastic pellets or powder in a predetermined amount in a tumbler, etc., and then fed to an extruder and melt-kneaded. Alternatively, as previously filed in Japanese Patent Application No. 5'7-12684, an extruder in which a screen is rotatably inserted is used to pelletize from one end of the heated ring to the other. Transferring the plastic raw material in the form of pellets or powder toward the extrusion port while melting it, and supplying the metal fiber manufacturing device 4 by the vibration cutting method in the middle part of the longitudinal direction of the heating/ring, and the metal fibers manufactured by the same device. A plastic raw material is melted first, the metal fibers are fed into this, and after kneading, it is extruded from the extrusion port at the other end of the cylinder, passes through a granulator, and is made into a plastic material containing metal fibers. There is a device that produces $-1 (pellets), but in the former, metal fibers become entangled in the extruder's ore supply popper, causing bridging, making the supply of pellets unstable and resulting in non-uniform composition. . In addition, during melting and kneading in the cylinder, the metal fibers are shortened due to the shearing force that accompanies the rotation over almost the entire length of the scree, and the special VC
Impact strength becomes weaker. In the latter case, the production amount of metal fibers is small and is about 100 to 5002 per hour. For this reason, the amount of plastic raw materials supplied can only match the production amount of metal fibers, so not only is the production amount low, but also the L/D (ratio of fiber length to diameter) of the metal fibers.
If the Vc becomes large, it becomes curled and tends to get entangled with each other at the supply port, and there are drawbacks such as the dumpling-shaped Vc making it difficult to supply a constant amount.

[3] Purpose of the Invention The present invention eliminates the drawbacks mentioned in fnJ, and is made by supplying longitudinally connected long metal fibers produced from a metal film from a supply source separate from the raw material Silastic. The above-mentioned supply port allows a stable constant supply without causing any burrs, and the supply amount of metal fibers can be easily controlled.Moreover, compared to the conventional method, the production amount is increased and the metal fibers are long and have excellent mechanical strength. The object of the present invention is to provide a method for manufacturing a composite plastic material containing metal fibers having the following properties.

[4] Summary of the invention Glasstic or a mixture of glasstic and other additives is supplied from a raw material supply port provided at one end of a heating cylinder of an extruder, and after melting and mixing, the raw material supply port and the other end of the extruder are A metal fiber supply 1!1 is provided in the middle of the outlet, and at least one or more metal long fibers are continuously supplied from the metal fiber supply port to continuously produce a metal fiber-containing plastic material. This is a method for manufacturing plastic materials containing metal fibers that allows the amount of metal fibers supplied to be easily controlled.

[5] Example One example according to the present invention will be explained with reference to FIG.
ke extruder tv heating +t y ric inner 6ft VC
1! J1 transfer nf noh sufu! J-1 and J-2 are inserted and connected to a drive device (not shown). The heating ring 11 is provided with one plastic raw material supply 13. A metal fiber supply port 14 and a volatile matter removal port 15 are provided, and hoppers 16 and 17 are attached to the plastic raw material supply port 13 and metal fiber supply port 14, respectively.

A pipe 19 is connected to the volatile matter removal port 15 to the vacuum pump 18.
Connection I~ is designed to be sucked. 20, two breaking tool shafts 21a and 21. b, and desired fibers and r
It has an uneven shape corresponding to a pitch of l in the circumferential direction, and is placed close to each other so that the unevenness of the lower axis matches 4. A metal film is introduced between these ten axis, and the metal film is formed at the convex part of the axis. film 22
The metal film ♀2 is continuously broken in the 1] direction by applying a tensile force in the 1J direction to produce the metal long fibers 23. 24, and is supplied to the metal fiber supply omper 17. 25 is an extrusion port for the melted and kneaded plastic material containing metal fibers.

With the configuration as described above, the plastic raw material It: The raw plastic raw material ¥4 supplied from the supply hopper 16 is melted while being compressed and transferred by the rotation of the scree J20. Next ((The long metal fibers 23 supplied from the metal fiber supply hopper 17 are fed into the molten plastic raw material, and are kneaded with the plastic raw material while being sheared into short pieces by the strong shearing force caused by the rotation of the scree. During melting and kneading, harmful volatile matter is extruded from the volatile matter removal port 15 through the vacuum bonder 18.
It is removed by suction.

[6] Effects of the invention By continuously supplying long metal fibers connected in the longitudinal direction to the glass raw material supply port and from another metal fiber raw material supply port, stable quantitative supply is possible without bridging in the hopper. Moreover, the supply amount can be easily controlled, but compared to conventional manufacturing methods, metal fibers (,) are mixed in in a longer state, and a large amount of plastic material containing metal fibers with excellent strength can be produced. has a remarkable effect.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of a method for producing a plastic material containing metal fiber 11. 11° force [1 heat cylinder/da, 12 scree. 13...silastic raw material supply port, 14...metal fiber supply 10.21...metal fiber manufacturing device 25, extrusion port. Applicant: Toshiba Machine Co., Ltd. 1 Figure

Claims (1)

[Claims] The heat from the heater provided outside the heating cylinder and the heat generated by the rotation of the scree rotatably inserted into the heating cylinder are used to supply the raw material from the raw material supply port at one end. A mixture of plastic or plastic and other additives is supplied from the raw material supply port and melted. After cross-crossing, a metal fiber supply port is provided between the raw material supply port and the extrusion port at the other end, and a plurality of metal fibers are continuously connected in the longitudinal direction so that at least one of the metal fibers is separated from the metal fiber supply port. A method for manufacturing a glasstic paulownia material containing metal fibers, characterized in that the glasstic paulownia wood material containing metal fibers is continuously produced by supplying the metal fibers to the glass, and the amount of metal fibers supplied can be easily controlled.