JPH09164575A - Method and apparatus for manufacturing resin plate having flow pattern - Google Patents

Abstract

(57) An object of the present invention is to provide an inexpensive and lightweight recyclable resin temporary enclosing board having a wood grain pattern and other flow patterns, and an apparatus therefor. SOLUTION: A plastic base material and a color masterbatch material having a higher melting temperature than that are supplied to an extruder 1 to be kneaded to bring the color masterbatch material into a semi-molten state and connected to the tip of the extruder 1. It is extruded from the existing fish tail die 6, cooled and solidified to manufacture a resin temporary enclosing plate A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a resin plate such as a resin temporary enclosure plate and an apparatus therefor, which are provided for ensuring safety at a construction site and its surroundings.

[0002]

2. Description of the Related Art Conventionally, a galvanized steel plate is generally used as a temporary enclosure plate. Since the site temporarily surrounded by such steel plates is a murderous landscape and harms the surrounding landscape, recently, for decoration purposes, paint is applied to the surface or a self-adhesive film is attached to the surface. (See, for example, Japanese Patent Laid-Open No. 6-272397).

FIG. 5 is a perspective view showing a temporary enclosure plate A,
The corrugated portion A1 is provided on both sides of the temporary enclosure plate A, and the protruding portion A is provided at one end thereof.
2 are formed. The temporary enclosure A has a height (H) of 200
0-3000mm, width (W) 610mm, thickness (T)
Those of 3.0 to 3.5 mm are generally used

[0004]

Since the conventional temporary enclosure plate is constructed as described above, it has the following problems. That is, a galvanized steel sheet needs to be re-plated or recycled because the galvanized steel sheet has only about 4 to 5 years due to the influence of acid rain. Therefore, if the selling price of galvanized steel sheet is 3000 mm high,
Even if it costs 800 yen per sheet, the post-construction cost will be large.
Moreover, the decorated steel plate is very expensive at 5000 to 7,000 yen per sheet. Furthermore, since the temporary enclosure plate is a steel plate, it is heavy and requires many workers to carry out the work, and in addition, a crane has to be used.

The present invention has been made in view of the above problems, and is a method and apparatus for manufacturing an inexpensive, lightweight and recyclable resin plate having a wood grain pattern or other flow patterns. The purpose is to provide.

[0006]

[Means for Solving the Problems] A resin base material and a color masterbatch material having a higher melting temperature than that are supplied to an extruder and kneaded to make the color masterbatch material in a semi-molten state. When it is extruded from the fish-tail die connected to, a resin temporary enclosing board having a fine and uniform wood grain pattern and other flow patterns is obtained. Even in the coat hanger die, a resin temporary enclosing plate having a similar flow pattern can be obtained by implanting a plurality of pins in the land portion. If necessary, a foaming material or glass fiber may be added to obtain a light-weight or high-strength resin temporary enclosure plate.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an apparatus for manufacturing a resin-made temporary enclosure plate having a flow pattern according to the present invention.

In FIG. 1, a screw 3 is rotatably inserted into a cylinder 2 of an extruder 1 so that the cylinder 2
An electric heater 4 is attached to the outer peripheral wall of the. A fish-tail die 6, which is a type of T-die, is connected to the tip of the cylinder 2 via a die plate 5 and the like. A roll stand 9 is arranged in front of the die 6.

FIG. 2 shows a perspective view of the fish-tail die 6, wherein the lip 7 of the discharge port of the die 6 is provided with a corrugated portion 7a for forming the corrugated portion A1 of the temporary enclosure plate A. With this corrugated portion 7a, it is possible to prevent the portion from being stretched and thinned in a later step. Note that the corrugated portion 7a may not be provided if the thickness may be slightly reduced. Further, the gap of the lip 7 of the discharge port of the die 6 can be adjusted by a bolt 8.

FIG. 3 is a view taken in the direction of arrow C in FIG. 1, showing the corrugated cooling roll 10 of the roll stand 9. The corrugated cooling roll 10 is a three-stage roll, and the lower roll 10a
And the molten resin B from the die 6 in the gap between the intermediate roll 10b and
Is to be inserted. Semicircular recesses 11 for forming the corrugated portion A1 of the temporary enclosure plate A are provided on both sides of the outer peripheral wall of the middle roll 10b, and the protrusion A2 of the temporary enclosure plate A is provided at one end thereof. Rectangular groove 12 for forming
Is provided. Semicircular convex portions 13 that engage with the semicircular concave portions 11 of the middle roll 10b are provided on both sides of the outer peripheral walls of the lower roll 10a and the upper roll 10c. The surface of the corrugated cooling roll 10 is hard chrome plated, and the base is hardened so as not to be scratched. In addition, a cooling medium is circulated inside the corrugated cooling roll 10 in order to remove the amount of heat from the molten resin B.

Next, the operation of the apparatus for manufacturing the resin temporary enclosure plate will be described.

As a raw material for the temporary enclosure plate A, a resin base material and a color masterbatch material having a higher melting temperature than that are used. A foam material may be added to make the temporary enclosure A light, and glass fiber may be added to make the strength high. When these raw materials are supplied to the extruder 1, the screw 3 and the cylinder 2 heated by the electric heater 4
And kneading while receiving the shear rate,
It is pushed out to the tail die 6 side. Cylinder 2 at this time
The setting condition is that the melting (plasticizing) temperature of the resin base material is 1
If it is 20 ° C, set it to around 135 ° C. The melting (plasticizing) temperature of the color masterbatch raw material is 140 ° C. or higher. By doing so, the color masterbatch raw material is naturally not completely melted (plasticized) but is in a semi-molten state and is extruded. In the die 6, if the color masterbatch raw material is adhesive (non-slippery) to the resin base material, even slightly to the inner peripheral surface of the die 6, the surface of the resin plate A extruded Shows grain patterns and other flow patterns. Since these flow patterns exist at any part in the thickness direction of the plate, the flow patterns will not disappear even if the surface is shaved using a planer or the like.

The molten resin B extruded from the die 6 is glossed, cooled and solidified by a corrugated cooling roll 10. The resin plate A that has exited the corrugated cooling roll 10 is taken backward by a take-up roll (not shown), cut to a fixed length by a guillotine cutter, and loaded, and then shipped as a resin temporary enclosure plate A after mounting holes are processed. It

In the embodiment of the invention described above, the T-die is the fish-tail die 6, but as shown in FIG. 4, a coat hanger type die 16 in which a plurality of pins 16a are planted at the entrance of the lip land. Can also be

[0015]

[Examples] Next, a polypropylene copolymer (cream color, pellets, melting temperature 127 ° C.) that is a resin base material
Polypropylene homopolymer (clay-colored masterbatch, pellets, melting temperature 166 ° C.), which is a raw material for the color masterbatch, are mixed at a mixing ratio of 20: 1 to 30: 1 and supplied to the extruder 1 to coat coat hanger. A resin temporary enclosure A that is extruded by the mold die 16 and fish tail die 6
An example of manufacturing the above will be described.

(Embodiment 1) When a coat hanger type die 16 having a coat hanger type manifold is used as the T die, when the molten resin B flows out from the manifold to the land portion, the flow pattern becomes a flow along the manifold. Therefore, it becomes a big ripple pattern and does not feel soft,
Only the resin-made temporary enclosure plate A having a low commercial value could be manufactured. Therefore, it has been found that when a plurality of round or boat-shaped pins 16a are provided at the entrance of the lip land so as to project by 1 to 2 mm, the flow pattern becomes fine and uniform.

(Embodiment 2) As the T-die, if the manifold is not a coat hanger type but a fish-tail die 6 that expands in a fan shape is used, the molten resin B flows out in a fan-shaped extrusion direction like a fish tail. As a result, it became clear that every part had the same flow and the flow pattern was fine and uniform.

In the above-mentioned embodiment, the resin plate is the resin temporary enclosure A provided for ensuring the safety of the construction site and its surroundings, but it may be a wood substitute.
In addition, a wide variety of applications are possible.

[0019]

Since the present invention is configured as described above, the following effects can be obtained. (A) The manufacturing cost is lower than that of the temporary enclosure made of steel plate with a picture. That is, the temporary fence made of steel with a picture is 5000
Approximately 400 yen for one temporary shroud made of resin for 7,000 yen per sheet
It will be 0 yen / sheet. (B) Since it is lightweight, installation work is easy,
A crane is also unnecessary and safe. (C) The resin-made temporary enclosure plate can be recycled by crushing it into small pieces when it is bent or damaged and mixing the raw material with a maximum of 30 to 40%. (D) The flow pattern has the same soft feeling as natural wood,
It can also be used as a temporary housing for private houses.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an apparatus for manufacturing a resin temporary enclosure plate according to the present invention.

FIG. 2 is a perspective view showing a fish tail die.

FIG. 3 is a view taken in the direction of arrow A in FIG. 1, showing a corrugated cooling roll of a roll stand.

FIG. 4 is a vertical sectional view showing a coat hanger type die.

FIG. 5 is a perspective view showing a temporary enclosure plate.

[Explanation of symbols]

 6 Fish Tail Die (T Die) 7 Lip 7a Corrugated Section 9 Roll Stand 10 Cooling Roll with Wave 10a Lower Roll 10b Middle Roll 10c Upper Roll 11 Recess 12 Groove 13 Convex 16 Coat Hanger Die 16a Pin A Temporary Enclosure Board ( Resin plate) A1 Wave part A2 Projection part B Molten resin

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location B29K 309: 08

Claims (8)

[Claims] 1. A resin base material and a color masterbatch material having a higher melting temperature than that are supplied to an extruder (1) and kneaded to bring the color masterbatch material into a semi-molten state, and the tip of the extruder (1). A method for producing a resin plate having a flow pattern, which comprises extruding from a fish tail die (6) connected to the section and cooling and solidifying. 2. The method for producing a resin plate having a flow pattern according to claim 1, wherein the foaming agent is supplied to the extruder (1). 3. The method for producing a resin plate having a flow pattern according to claim 1, wherein the glass fiber is supplied to the extruder (1). 4. An extruder (1) for kneading a resin base material and a color masterbatch material having a melting temperature higher than that to bring the color masterbatch material into a semi-molten state, and a tip portion of the extruder (1). A resin having a flow pattern, characterized by comprising a fish tail die (6) connected to the die and a roll stand (9) for cooling and solidifying the molten resin (B) extruded from the die (6). Plate manufacturing equipment. 5. The apparatus for producing a resin plate having a flow pattern according to claim 4, wherein the cooling roll of the roll stand (9) is a corrugated cooling roll (10). 6. An apparatus for producing a resin plate having a flow pattern according to claim 4, wherein the lip (7) of the fish tail die (6) is provided with a corrugated portion (7a). . 7. A coat hanger type die (16) in place of the fish tail die (6), the die (16)
7. The apparatus for producing a resin plate having a flow pattern according to claim 4, 5 or 6, wherein a plurality of pins (16a) are planted at the entrance of the lip land. 8. The apparatus for manufacturing a resin plate having a flow pattern according to claim 4, wherein the resin plate is a resin temporary enclosing plate (A).