JPH0324136A - Filler for plastic and process and apparatus for producing same - Google Patents

Abstract

PURPOSE:To obtain a filler for improving the shrinkage, anisotropy of thermal expansion and deterioration of the strength of a weld of a plastic molding by drawing a specified material prepared by fixing a mist of the material on a thin sheet into a wire and cutting this wire to a specified length. CONSTITUTION:A mist of a high-lead glass 17 in a state molten with a sprayer 13 is dropped onto a thin sheet 11 of E glass drawn from the exit 3 of a melting furnace 1 and is fixed on the sheet 11. Because the drum surface 22 is heated with a heater 24, the glass is brought into a stringy state 37. The high-lead glass in this state is cut with a cutter 25 so that protrusions 38 of a specified length may form on the surface of the sheet. The sheet thus treated is drawn with tension drums 29 and 30 and cut with a cutting drum 31 provided with a cutting edge 34 while it is supported by the cutting drum 32. In is brought into a state of a filler 40 composed of protrusions 38 comprising the high-lead glass fixed on a flake 39 comprising the E glass, and this filler falls onto the mesh plate 35 of a recovery box 33 and is recovered.

Description

[Detailed Description of the Invention] [Field of Application for Industrial Professionals] The present invention relates to a plastic material consisting of a plastic filler material and a filler.

The present invention relates to a filler mixed into a base material, and a method and apparatus for producing the same.

[Prior art] In order to improve the mechanical strength and precision of plastic molded products, fillers such as glass fiber, carbon fiber, mica, voluminous 1/Nyl, and whiskers have been added to the plastic base material. Composite oval materials are commonly used. Depending on the shape, these fillers can be fibrous (glass fiber, potassium titanate whiskers, etc.), flaky (glass flakes, mica, etc.), spherical/granular (glass beads, glass (balloons, silica grains, etc.), etc. Among these, those that have been found to be effective in improving the mechanical strength and elastic modulus of brass crystals are fibrous and thin. Although limited to one type, both have the following drawbacks.

First, fibrous filling causes shrinkage during molding and thermal expansion of the molded product because the fibers are oriented in the flow direction of the plasticized plastic base material during molding, such as injection molding. ,I! Large anisotropy (a phenomenon in which the value differs depending on the direction) is observed in mechanical strength, elastic modulus, etc. In addition, the flaky filler improves the anisotropy considerably, but in the weld part of the shaped product (the part where the flowing tip of the base material joins), the flakes become laminated (Rh), and the gaps between the flakes become Rh. When the base material is almost completely lost, the mechanical strength is extremely reduced.

Although these defects can be improved to some extent by changing the shape of the high-profile product and certain forming conditions, there are limits to this improvement, and improvements in materials are required. As an approach to improve this material in terms of IT, the Blasti-Nok shape material, in which the shape of the filler is made into a three-dimensional linear shape, was published in Japanese Patent Application Laid-Open No. 5-5-7.
It is disclosed in Publication No. 3737. Also NIKK
Il'L NE-Old T[! ! ? [ALs (1 9
1994, April 3rd issue, p. 19) describes ZnO whiskers with a tetrapod-like three-dimensional structure, which are made by surface-modifying Zn powder through chemical treatment and then heat-treating it in a special atmosphere to elongate it. is disclosed.

[Problems to be solved by the invention] A filler and a method for producing the same are disclosed in Japanese Patent Application Laid-Open No. 5-7-37-37. This method involves fusing or gluing straight fibers in a criss-cross pattern, and it is difficult to implement it commercially in terms of productivity, and there is no specific disclosure of manufacturing equipment, etc. There is also a description that when pulling out the fibers, it is made into a spiral shape or deformed into a four-wave shape.
These shapes of fillers often become intertwined with each other when mixed with plastic filler material, resulting in difficulty in dispersibility.

In addition, tetrapod-shaped ZnO whiskers are very desirable in terms of shape and strength, but they are expensive compared to glass fibers, etc., and have a specific gravity of 2 inches or more than E glass, which is usually used as a filler material, so they are heavy. To become,
Since it has semiconductor properties, it has disadvantages such as difficulty in applying it to molded products that require electrical insulation.

The present invention has been made to solve these problems.
Improves the anisotropy of shrinkage and thermal expansion of plastic products,
It is an object of the present invention to provide a filler that does not cause deterioration in strength of the weld portion and can meet various requirements such as specific gravity and resistivity, and a manufacturing method and apparatus that can produce this filler with high productivity.

[Means and effects for solving yAB] In order to achieve the above object, the filler of the present invention contains glass flakes,
It is characterized by having a three-dimensional structure in which protrusions formed from a material with a softening point lower than that of the material of the thin piece are integrally bonded to the surface of a thin piece such as Myroku or a thin piece obtained by dividing a sheet into pieces. . The protrusions of the filler prevent lamination of flakes at the weld portion, thereby preventing a decrease in strength.

The method for manufacturing the filler is to use a material with a low softening point to form a thin film or a continuous thin film. tN, a drum or the like is brought into contact with this material, and then pulled apart to stretch the material with a low softening point, thereby forming protrusions in the direction substantially normal to the surface of the thin piece or sheet, and It is characterized by further subdivision. One of the filler manufacturing apparatuses of the present invention includes a sheet manufacturing apparatus that forms a thin sheet from a material having a relatively high softening point, and a sheet manufacturing apparatus that sprays and supplies the thin sheet with a material that has a low softening point. It is equipped with a spraying device, a forming drum for stretching a material with a low softening point, and a cutter for cutting the stretched material to form protrusions, and after forming a thin sheet, the low softening point material is sprayed onto its surface. The thin sheet is made into fine sheets by fixing it with a metal drum, stretching it with a shape drum, and cutting it with a cutter. Further, the filler manufacturing apparatus of the present invention includes a feeding device for flakes having a relatively high softening point, a flake support to which the flakes are attached and conveyed, and a material with a low softening point applied to the flakes on the flake support. A drum for supplying a low softening point material, a spraying device for spraying and supplying a low softening point material to the drum, a force roller, etc., and a thin film on a thin film support and a granular low softening point material on the drum are brought into contact with each other. By joining and then separating, the low softening point material is stretched, cut with a cutter, and then collected. In the above, we have compared the softening points of flakes and protrusions, but the same treatment can be applied to melting points. [Example] Hereinafter, an example of the plastic filler of the present invention and a method for manufacturing the same will be described together with a manufacturing apparatus used to carry out the method.

(First Embodiment) Fig. 1 is a sectional view of the main part showing the first embodiment of the plastic filler manufacturing apparatus of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is an enlarged sectional view of the main part of Fig. 1. FIG. 2 is an enlarged perspective view of the shape of the filler. The apparatus for manufacturing a plastic filler shown in FIG. 1 will now be described. The melting furnace 1 has an inlet 2 protruding from the clay wall and an outlet 3 opening from the side wall, and is capable of keeping the E-glass 4 for sheets or shapes stored inside the furnace in a sufficiently low viscosity state. It is equipped with a heating means (not shown) that can The inlet 2 of the melting furnace 1 is connected to a furnace (not shown) located at a different location, and the amount of E glass supplied from the furnace and the amount of discharge discharged from the outlet 3 of the melting furnace 1 are E-glass is always supplied so that the values are approximately equal, and the amount of E-glass in the melting furnace l is kept approximately constant. At the discharge port 3 of the melting furnace 1, a pair of vertical rollers 5.6 are disposed so as to be freely rotatable. Furthermore, in order to shape the ejected E glass 4 into a thin sheet, a pair of upper and lower shaping rollers 7, 8 and shaping rollers 9, 10 are installed at a distance between the upper and lower rollers, respectively, along the traveling direction of the E glass. It has a small size and is arranged so that it can rotate freely. In order to support and feed the E glass shaped into a thin sheet 11, a plurality of (four rollers are shown in the figure) parallel feeding rollers 12 are provided. A spray device 13 for depositing a mist on the surface of the thin sheet l1 is disposed above the feed roller l2. This spray device 13 includes, from the top of the figure, a melting furnace l4, a nozzle l
5 and a cover 16, and the interior of the melting furnace 14 is filled with a substantially constant amount of high lead glass 17, similar to the E glass 4 of the melting furnace 1. That is, melting furnace l4
An inlet 18 formed in the earthen wall and an outlet formed in the lower wall (
(not shown), and is equipped with heating means (not shown) for keeping the high lead glass l7 inside in a low viscosity state. An air pipe 19 connected to a compressed air supply machine (not shown) is connected to the nozzle l5 connected to the discharge port of the melting furnace 14, and compressed air supplied through the air pipe 19 inside the nozzle 15 is connected to the nozzle l5. and the high lead glass l7 discharged through the discharge port of the melting furnace 14 are mixed, and the high lead glass of the atomized material 20 is ejected downward. In addition, the outer peripheral wall of the force bar 16 is connected to the electric furnace 2.
1 to maintain the temperature inside the cover 16 at a high temperature.

A pair of rotatable drums 22 and 23 are disposed on the right side of the spraying device l3 (in the direction in which the sheet travels), and near the surface of the upper drum 22, there is a A heater 24 is arranged to heat the. Further, a cutter 25 is disposed on the lower right side of the forming drum 22 in the above example, and a hosk 1/river 26 and a suction box 21 are disposed on the upper right side. The cutter 25 has its tip at a predetermined distance from the surface of the drum 22, for example 0. 0 1-1
It is selected and set between about 100 gm. The tip of the scraper bar 26 is biased against the surface of the oval drum 22 with a constant force. The fi pull box 27 is. The drum 22 is connected to a vacuum suction device (not shown) so that when the high lead glass adhering to the surface of the drum 22 is scraped off by the scraper 26, it is sucked and collected. In addition, a plurality of (three in the figure) feed rollers 28 are provided on the 1'xT side (the traveling direction of the sea) of the large drums 22 and 23.
A pair of tension drums 29, 3O, a pair of cutting drums, '. 31, 32 and a storage box 33 are provided. The outer periphery of the tension drum 29 located at -1-a is made of a soft foam material such as I7 urethane resin.

Also, the outer peripheral portion 1 of the left cutting drum 32. The cutting drum 310 is made of a soft foam material such as urethane resin, and a cutter @ 34 is installed at a certain length on the outside of the cutting drum 310 on the right side. The storage box 33 has the pair of cutting drums 31 and 32 disposed inside on two sides, a mesh and a temporary 35 disposed in the lower part of the interior, and a lower part connected to a vacuum suction device (not shown). ing.

The foregoing rollers 5, 6, 7, 8, 9, 10, the feed rollers 12, 28, the oval drums 22, 23, the tension drum 29.
30 and cutting drums 31 and 32 each have an i! The rotation is controlled by illumination and a driving source.

A method for producing the desired filler using the production method of the filler for blasting from the above-mentioned III-1 is explained below.6 First, the sheet is kept in a sufficiently low viscosity state in the melting furnace 1. The glass 4 for use is gradually formed into 4 sheets by the forming roller 5.6 and the forming rollers 7, 8, 9.1 (l) while being taken out and pulled out from the outlet 3 or 6 of the melting furnace 1. , it is finally shaped into a thin sheet 11 of E glass to a thickness of about 1-10 μm, and then passed through the feed port 12.
Since it is not supported by the spray bag holder 13, it is sent to the lower part of the spray bag holder 13.

Next, the thin sheet 1lζ of E-glass is heated by the injection device 13 (4) and the high lead glass 17 in a molten state is heated to 5 to 5
The atomized material (granules) 20 with a size of approximately 0 μm is sprayed and adheres to the sheet 1l. The high lead glass on the E glass sheet adheres to the sheet 11 and the forming drum 22 when the certain shaped drums 22 and 23 are heated, but the surface of the drum 22 is heated by the heater 24. As a result, a stringy state 37 (J shown in the second diagram) occurs. At step 25, protrusions 38 of a predetermined length are cut on the sheet surface. Then the tension drum 29
, 30, the sheet 11 having a protrusion 38 formed thereon is supported by a cutting drum 32,
As shown in FIG. 3, the filler material 40 is cut into a thin piece 391, which is stronger than E glass, and has a certain protrusion 38 fixed to it from high lead glass. The meso-sive inside fell onto Kari 35 and was collected there as well.

The high lead glass is linearized in the oval drum 22 and 23,
When cutting with the cutter 25, excess high lead glass 41 (see Figure 2) adhering to the surface of the preform drum 22 is mechanically scraped off by the scraper 26 that comes into contact with the surface of the preform drum 22. After being sucked into the suction box 27 and collected, transported to a furnace (not shown) and remelted, it is sent again to the high lead glass melting furnace 14 and reused.

The filler obtained by the manufacturing apparatus of the above embodiment is a thin sheet of E glass that can be used as a filler base material and can form protrusions from a stringy (linearized) state at a relatively low temperature. It is difficult to cause thermal deterioration, and the running cost in manufacturing can be reduced. In addition, the filler with a three-dimensional structure in which protrusions are formed on a thin piece does not stack up due to protrusions at the weld part during injection molding, etc., so it is possible to obtain a high-profile product that does not cause strength deterioration in that part. be able to. In the first embodiment, glass and high lead glass were selected and combined as the materials for forming the filler, but the materials are not limited to the above, and other mineral materials,
It can also be applied to organic materials or metal materials that do not thermally soften at the forming temperature of the plastic base material, and the protrusions can be formed using materials that have a thermal softening point or melting point lower than that of the sheet material. By doing so, this embodiment can be applied. (Second Embodiment) FIG. 4 is a sectional view of a main part showing a second embodiment of the plastic filler manufacturing apparatus of the present invention, and FIG. 5 is an explanatory diagram of the main part of an upper drum. Note that the same members as in the above embodiment will be explained using the same reference numerals. In the figure, the supply tank 50 is open at the top, and there are thin pieces of E glass (glass flakes) 3 inside.
It stores 9. This flake 39 is supplied to the surface of the drum 53 in a fixed amount via a supply cylinder 51 connected to the lower part of the supply tank 50 by adjusting an on-off valve 52 rotatably disposed inside the supply cylinder 51. Ru. The surface of the drum 53 is made of a perforated member 54, and the inside is hollow and connected to a suction device (not shown) through a ventilation hole 56 formed in a fixed shaft 55. Therefore, the thin piece 39 is attracted to the surface of the drum 53 by the operation of the suction device.

The fixed shaft 55 is provided with a shaft so as to cover a part of the porous member 54 in the surface layer inside the drum 53 (range from the position indicated by P to the position indicated by Q on the drum shown in FIG. 4). A shielding member 57 is attached. 58 is a porous member 54
This is a seal member interposed between the shield member 57 and the shield member 57. Also, 59 is a sealing member that seals each part (Fig. 5).
．． A connecting shaft 60 that rotatably supports the drum 53 is fitted onto the fixed shaft 55, and the drum is rotated counterclockwise by being connected to a drive device (not shown) via the connecting shaft 60. It has become. A flake collection box 61 is disposed below the supply tank 50, and is connected to a suction device (not shown) so as to collect excess flakes (glass flakes) that are not adsorbed on the surface of the drum 53 by suction using negative pressure. ing. The collected flakes are then sent to the supply tank 50 via the feed pipe 62 again. Also drum 53
A scraper 63 is disposed on the upper right side of the drum 53 and is biased so that its tip presses the surface of the drum 53 with a constant load. A collection box 33 having a mesh plate 35 inside and whose lower part is connected to a vacuum suction device (not shown) is disposed below the scraper 63. A drum 64 disposed below and very close to the drum 53 is connected to a drive device (not shown) so as to rotate clockwise at a circumferential speed approximately equal to the circumferential speed of the drum 53.

A spraying device 13 is disposed on the left side of the lower drum 64. Similar to the spraying device of the first embodiment, this spraying device 13 has a molten glass 14 filled with a certain amount of high lead glass 17, and air. A nozzle 15 connected to a compressed air supply fi (not shown) via a pipe 19 and a cover 16 to which an electric furnace 21 is attached are used to produce a mist 2 in which high lead glass 17 is melted.
It is designed to eject when set to 0. Also both drums 5
3. Between the proximal portion of 64 and the cover 16, there is a drum 64.
A heater 65 is provided to heat the surface and prevent the high lead glass mist 20 from solidifying.

A cutter 66 with a sharp tip is disposed at a predetermined distance from the drum 53 at the closest portion of both drums 53 and 64 on the opposite side of the heater 65. A scraper 25 is disposed below the drum 64 and is biased so that its tip presses the surface of the drum 64 with a constant load to mechanically peel off (scrape off) deposits on the drum surface. ．． A suction box 27 connected to a vacuum suction device (not shown) is disposed upstream (right side) of the scraper 26 so as to suck and collect the attached objects dropped by the scraper 26. has been done.

A method for producing a desired filler using the production apparatus having the above structure will be described below. A thin piece of E glass 39, which has been shaped in advance to a predetermined size, is supplied onto the surface of a drum 53 that rotates counterclockwise, with the supply tension adjusted by an on-off valve 52 disposed within the supply cylinder 5l. Ru. The supplied thin piece 39 is conveyed counterclockwise while being attracted to the surface layer of the drum 53 made of a porous member 54 through the ventilation hole 56 of the fixed shaft 55 by the operation of the suction device.

At this time, on the surface of the drum 53, one to two thin pieces 39 are attracted and held on almost the entire surface,
Excess thin pieces fall and are collected in the book piece collection box 61.

On the other hand, the high lead glass 17 which is in a molten state is sprayed out by the spraying device 13 in the form of particles and mist 20 with a size of about 5 to 50 microns, and the drum 6 rotates clockwise.
It is deposited on the surface of 4. The adhered high lead glass is softened by the heater 65 and adheres to the thin piece adsorbed and held on the drum 53, and when both drums 53 and 64 separate from each other, a state of C-threading (linearization and elongation) occurs. This stringy high lead glass is produced in the granite drum 53.
．． A cutter 66 disposed between the thin pieces 64 cuts the thin piece so as to form a protrusion of a predetermined length on the thin piece.

The filler having 3 protrusions on the 71 piece 39 is further adsorbed and held on the drum 53 and conveyed, and then transferred to the scraper 63.
It is scraped off from the surface of the drum, sucked into the collection box 33, and collected. Further, the excess high lead glass protrusions 41 adhering to the drum 64 are scraped off from the drum surface by the scraper 26, sucked into the suction box 27 and collected, and then returned to the melting furnace l4 of the spraying device l3. It is sent and reused. According to the manufacturing method and manufacturing apparatus of the above embodiments, the first
In addition to the effects of the embodiments, the filler shown in the third figure having a three-dimensional structure can be easily manufactured using existing flaky fillers such as glass flakes and mica. [Effects of the Invention] The filler according to the present invention has three particles having protrusions on the flaky surface.
Because it has the following structure, it improves the anisotropy of shrinkage and thermal expansion of plastic products, and does not cause deterioration in the strength of the welded part. In addition, since the material of the filler can be appropriately selected from mineral materials such as glass, polymer materials, gold filling materials, etc., it is possible to obtain a filler that can be used even in cases where electrical insulation and low specific gravity are required. ．． According to the manufacturing method and apparatus of the present invention, the filler of the present invention can be easily manufactured and protrusions can be formed at a relatively low temperature.
Running costs in manufacturing can also be reduced. In addition, it is possible to easily make a three-dimensionally structured filler into a material such as E-glass whose strength deteriorates or is difficult to maintain by reheating.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the main parts of the first embodiment of the apparatus for producing fillers for plastics according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main parts of FIG. 1, and FIG. FIG. 4 is an enlarged perspective view of an example of the shape, FIG. 4 is a sectional view of a main part showing a second embodiment of the manufacturing apparatus, and FIG. 5 is an explanatory diagram of the main part of one drum. 1... Melting furnace 4... E glass 5 6
7.8, 9.10... Shape roller 11... Sheet 13... Spraying device special 4... Melting furnace 6... Cover ■... Electric furnace 4, 65... Heater 6 , 63.66...Screw 7...Suction box 1.32...Cutting drum 8...Protrusion 0...Filler 15...Nozzle l7...High lead glass 22.23...・Gold drum 25.66... Canter raper 29.30... Tension drum 33... Collection box 39... Thin piece license Applicant: Olympus Optical Industry Co., Ltd. Figure 2 Figure 5

Claims (5)

[Claims] (1) In a filler used mixed into a plastic base material, a protrusion formed of a material having a softening point or melting point lower than that of the material of the flake is integrally bonded to one side surface of the flake. A filler for plastics characterized by: (2) A material having a softening point or melting point lower than that of the thin piece or sheet is fixed as a mist onto a thin piece or a thin sheet, the mist is stretched to form a line, and the linear portion is formed into a predetermined length. A method for producing a filler for plastics, which comprises cutting the thin piece or thin sheet at a predetermined angle, forming protrusions of a predetermined length on the thin piece or thin sheet, and recovering the filler in a predetermined shape. (3) a sheet manufacturing device that molds and supplies a thin sheet from a material with a relatively high softening point; a spray device that sprays and supplies a material with a low softening point to the thin sheet;
a forming drum that stretches a material with a low softening point fixed to the sheet into a linear shape; a cutter that cuts the linear portion formed on the sheet into a predetermined length; and the sheet having the linear protrusion. 1. An apparatus for manufacturing a filler for plastics, comprising a cutting drum for cutting the filler into a predetermined size. (4) A device for supplying a thin piece having a relatively high softening point, a thin piece support that holds and conveys the thin piece, and a thin piece that supplies a material with a low softening point to the thin piece on the thin piece support. a drum rotatably disposed close to the support; a spray device for spraying and supplying the material with a low softening point to the drum; An apparatus for manufacturing a filler for plastics, comprising: a cutter for cutting the material having a low softening point, and a collection box for collecting the flakes having the linear protrusions. (5) The flake support consists of a drum that adsorbs and holds the flakes and conveys them, and the drum that supplies the material with a low softening point to the flakes on the drum removes the material with a low softening point that has adhered to the surface of the drum. 5. The apparatus for manufacturing a filler for plastics according to claim 4, further comprising heating means for softening.