JPH03208828A - Device for producing plastic filler - Google Patents

Abstract

PURPOSE:To increase the mechanical strength of the filler by providing a compressing device, a heater, a discharged base material winding drum and a cutter roller, forming the molten base material in a vessel by a combination of the end faces of an orifice plate and smoothly working the formed material. CONSTITUTION:A piston 12 is raised by an air cylinder 14 outside a cylinder 11, and then a glass material to be formed is charged, heated by an electric furnace 28 and melted. The molten glass 10 with the viscosity specified is compressed by lowering the piston 12 with the air cylinder 14, and a non-circular fiber 36 is extruded from the orifice hole 16 bored in the bottom of the cylinder 11 and from the orifice 15 of an orifice plate 18 formed with the plates 22-24. The extruded fiber 36 passes through an electric furnace 26, extended and wound on a winding drum 30 several times. The fiber 36 is then solidified, delivered to a cutting roller 31 and cut to a specified length by the cutter teeth 35 of a roller 34, and a plastic filler 40 is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for producing a filler added to a plastic base material.

[Conventional technology]

In order to improve the mechanical strength and dimensional accuracy of plastic molded products, fibers with a non-circular cross-section are sometimes used as a filler added to the plastic base material. For example, Japanese Patent Application Laid-Open No. 191436/1983 discloses an apparatus for manufacturing such non-circular fibers that stores a molten mineral material and discharges the molten mineral material as one or more streams from a non-circular orifice provided in a wall. a container (bushing) for causing the discharged material to be mechanically drawn out as fibers, and a winder for mechanically drawing out the discharged material as fibers, and a winder for hardening the discharged molten mineral material as mineral fibers before it takes on a circular cross-section due to its surface tension. A device with a rapid cooling means for this purpose is described.

[Problem to be solved by the invention]

However, in the production apparatus disclosed in JP-A-62-191436, the molten mineral material is drawn out from the non-circular orifice in an extremely low viscosity state, so the cross-sectional shape of the fibers produced maintains the shape of the non-circular orifice. Therefore, the effect of the filler due to the non-circular cross-sectional shape may not be exhibited in the plastic molded product.

In addition, when forming the above-mentioned non-circular orifice in the wall of the container, if the orifice that determines the cross-sectional shape of the fiber is directly drilled in one wall (plate), the opening width of the orifice is extremely narrow. Since it is difficult to make the wall surface smooth, the surface roughness of the orifice wall surface is reversed and the unevenness of the fiber 1 shown in FIG. There was a problem in that the thickness was locally extremely thin, making it easy to break (become pulverized).

The present invention has been made in view of the above-mentioned problems, and is a manufacturing apparatus that can manufacture non-circular fibers of a desired shape without impairing the shape and mechanical strength, and can manufacture a desired filler. The purpose is to provide the following.

[Means and effects for solving the problem] In order to achieve the above object, the manufacturing apparatus of the present invention uses a molten base material to produce a plastic filler by flowing out of a molten base material from a non-circular orifice. a container containing a material and having a non-circular orifice on the wall surface; a pressurizing device that pressurizes the base material in the container; a heating device that heats the base material; a heating device provided below the orifice; It has a winding drum that stretches out the flowing base material, and a cutter roller that cuts the rolled and solidified base material into a predetermined length.

The orifice in the manufacturing apparatus has a relatively narrow width compared to an orifice used in the processing of ordinary glass fibers, etc., and a relatively high viscosity molten mother is produced through the orifice at a relatively high pressure. After the material is extruded, the molding material expands and becomes finer before it is completely cooled to produce a filler.

The orifice structure described above has a shape that forms a non-circular orifice outline on each combined end surface of a plurality of plates (dividable and combinable members) in the part where the molten base material flows out. After the wall surfaces of the contours are smoothed, an orifice (orifice hole) of a desired shape is formed in the center by a combination of these contours.

For example, if the orifice is approximately T-shaped, the contours 2a, 3a, and 4a of the orifice 5 are formed on each end face of plate 2.3.4 as shown in Fig. 1, and the orifice 5 is formed by smoothing the end faces. 5 is formed.

The width of this orifice 5 is preferably 0.05 to 0.5
(2), more preferably 0.1 to 0.3-, which is a fairly narrow width. Also, the pressure is preferably 5 to 300 kgf
/d, more preferably 20 to 200 kgf/d. Furthermore, the viscosity is set to about 10' to 10' poise.

The fibers produced by the production apparatus under the processing conditions have the shape of the orifice well-transferred.

Further, in the orifice in the manufacturing apparatus, the outline of the orifice is formed on each end surface of each of the plurality of plates forming the orifice, so it is easy to smooth and mirror-finish the end surface and the surrounding edges. This makes it possible to smooth the surface of the molding material flowing out.

〔Example〕

The apparatus for producing a filler for plastics according to the present invention will be described below based on examples.

(First Example) Figure 2 shows the first example of the manufacturing apparatus for the plastic filler of the present invention.
3 is a perspective view showing the structure of the orifice in the same device; FIGS. 4 a, b, and C are explanatory diagrams of various shapes of non-circular orifices; and FIG. Figures a, b and c are perspective views showing the shape of each filler material manufactured corresponding to each orifice of Figures 4a, b and c, respectively.

The apparatus for manufacturing a plastic filler shown in the second figure will now be described.

A piston 12 is fitted into a cylinder 11 that houses molten glass 10 as a molding material.This piston 12 is connected to an air cylinder 14 via a heat insulating plate 13.
It is supported so that it can move up and down. Also cylinder 1
As shown in FIG.
The convergence t+ (
An orifice hole 16 is bored at t+ = 0.3 wa, length 2.6 cm), and screw holes 17 are provided at three locations.

An orifice plate 18 forming an orifice 15 having the width t is attached to the bottom surface of the cylinder 11 via a holding plate 19 with three bolts 20.

This orifice plate 18 consists of three plates 22,
23.24, each plate 22.23.24
Orifice contours 22a, 23a, 24a are formed on each end face of the combination to form the orifice 15.
is formed, and the wall surface forming the contour is sufficiently smooth,
In other words, it is finished to a mirror surface. Each plate is also provided with through holes 25 for each of the bolts (third
In the diagram, each play) 22 is shown to make the diagram easier to read.
．． 23 and 24), and the holding plate 19 has a shape similar to the orifice 15 and a width t8 of the orifice 15 and a cylinder 11.
ts (h=
An orifice hole 26 is bored (tv<tl<ts) at a length of 0.4 mm and a length of 2.7 m, and 27 is a through hole for the bolt 20.

Furthermore, an electric furnace 28 is provided around the cylinder 11 to heat and melt the molding material.

An electric furnace 28 is provided below the electric furnace 28 to keep the molding material flowing out from the orifice 15 of the orifice plate 18 warm.

Further, below this electric furnace 28, a winding drum 30,
A cutting roller 31 and a collection box 32 are provided in this order. The winding drum 30 is rotatably supported by a motor (not shown), and its surface is made of a material with extremely low elastic modulus, such as urethane foam. Further, the cutting roller 31 is rotatably supported by a motor (not shown), the surface of one fixed roller 33 is made of a material such as rubber, and cutters are placed at equal intervals on the surface of the other roller 34. Teeth 35 are provided and said fixed roller 33
It is provided so as to be movable in the vertical direction.

Now, a method for manufacturing a desired filler using the plastic filler manufacturing apparatus having the above configuration will be described below.

First, the piston 12 is raised by the air cylinder 14 to a position where it is not fitted into the cylinder 11. After that, the glass material of the molding material (for example, 20% as the type of glass)
0E) and is heated and melted in the electric furnace 28.

Note that the glass material to be introduced may be molten or softened glass in advance, and the glass viscosity is approximately 1.
The molten glass 10, which is ready to flow and has a poise of about 0' to 10', is compressed by the air cylinder 14 by lowering the piston 12, and then the molten glass 10, which has a width of 1. orifice hole 16, and play) 2
2.23 Orifice plate 18 formed at 24
The extruded fibers 36 are extruded as non-circular fibers 36 from the orifice 15 of the fibers 36, and while passing through the electric furnace 29, they are stretched and wound several times on a rotating winding drum 30. That is, the fibers 36 are wound around the winding drum 30 in a state where the circumferential speed of the winding drum 30 is faster than the outflow speed of the molten glass 36.

Thereafter, the fibers 36 are sent out in a solidified state to the cutting roller 31, cut into a predetermined length of filler material 40 by the cutter teeth 35 of the roller 34, and collected into the collection box 32.

The shape of the orifice and orifice hole in the above description is approximately T-shaped as shown in FIG. 4a, and as shown in FIG.
3.24, the cylinder 11, and the holding plate 19, but the substantially Y-shape and the substantially cross-shape shown in FIGS. Figures a, b and c are shown.

In this embodiment, the width t3 of the orifice was set to 0.2 fi, but the width is 0.05 to 0.5 mm, preferably 0°1.
The fiber spinning orifice can be carried out with a diameter of about 0.3 m to 0.3 m, which is smaller than a normal fiber spinning orifice.

In addition, the ratio of the slit radius t8 to the length was set to 12.5, but
It can be selected from about 10 to 50. Further, the glass viscosity was set at 10' to 10' poise, but it may also be set at 103 to 10' poise, and this viscosity is also higher than that of a normal fiber spinning orifice.Furthermore, the pressure during spinning near the orifice is Although it varies depending on the combination of each condition, the pressure is preferably 5 to 300 kgf/d, more preferably 20 to 100 kgf/cd, which is much higher than the pressure in normal glass spinning. filling material) thickness is 3μl
It is adjusted to about 1 to 15 μm.

The cross-sectional shape of the fiber or filler created by the above configuration and processing conditions is similar to the orifice shape because the glass viscosity of the molten base material is high. In addition, the surface condition of fibers or fillers is determined by
1. Smallest orifice width. It is.

The orifice plate that forms this orifice width tz is composed of a plurality of splittable plates, and the walls for forming the orifice contour of each plate can be machined to be sufficiently smooth. The illustrated surface condition is very smooth and almost no damage due to surface defects occurs.

(Second Embodiment) Figure 6 shows the second embodiment of the apparatus for manufacturing filler for plastics of the present invention.
FIG. 3 is a plan view of main parts of the embodiment.

This embodiment shows an embodiment in which a plurality of orifices are arranged below the cylinder in the plastic filler manufacturing apparatus having the configuration of the first embodiment described above, and other configurations will be explained below. Since they have the same configuration, they will be omitted, and only the orifice will be explained below.

As shown in FIG. 6, the orifice plate forming one orifice 41 (indicated by the hatched area) is formed by three plates 42, 43 and 43, respectively. In this case, similar-shaped orifice holes are formed on the bottom surface of the cylinder and on the holding plate, as in the first embodiment, and screw holes and through holes for fixing are also formed.

By forming a large number of orifices in this way, a plurality of fibers can be extruded at one time, making it possible to provide a filler manufacturing apparatus with higher production efficiency.

In addition, in FIG. 6, only one type of orifice shape is provided, but orifice shapes can be combined as appropriate.

In each of the above examples, the molding base material of the filler is described as glass, but the base material is not limited to glass, and may be other mineral materials or organic materials that do not heat soften at the molding temperature of the plastic base material. , can also be used for metals, etc. In addition, even for organic materials that soften under heat, such as PAN, it is possible to create a non-circular filler made of carbon by subjecting the filler to high temperature treatment after creating the filler. can.

(Effects of the Invention) As described above, according to the plastic filler manufacturing apparatus of the present invention, the filler has a non-circular shape that is almost similar to the orifice shape, and the surface condition is smooth and mechanically stable. It is possible to produce fillers for plastics with high strength.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an example of the configuration of an orifice in an apparatus for producing a filler for plastics of the present invention, and FIG. 2 is a sectional view of a main part of the first embodiment of the apparatus for producing a filler for plastics of the present invention.
FIG. 3 is a perspective view showing the structure of the orifice in the same device, FIGS.
FIG. 6 is an explanatory diagram of the orifice structure of the second embodiment, and FIGS. 7 a and b are enlarged explanatory diagrams of conventional fibers and main parts. . 1.36... Fiber 2.3, 4, 22, 23.24, 42.43... Plate 5.15.41... Orifice 10... Molten glass 11... Cylinder 12... Piston 14... Air cylinder 16.26... Orifice hole 18... Orifice plate 19... Holding plate 28.29... Electric furnace 30... Winding drum 31... Cutting roller 32...・Collection box

Claims (1)

[Claims] a container for storing a molten base material and having a non-circular orifice on a wall surface; a pressurizing device for pressurizing the molten base material in the container; and a heating device for heating the molten base material; a heating device that heats the base material that has flowed out of the container; a winding drum that stretches the base material that has flowed out; and a cutter roller that cuts the rolled and solidified base material into a predetermined length; An apparatus for producing a filler for plastics, wherein the orifice has an orifice width of 0.5 mm or less, is formed by a combination of end faces of a plurality of orifice plates, and each end face is processed to be smooth. .