JP3427175B2 - Manufacturing method of thermoplastic synthetic resin lattice plate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoplastic material for use as a filter media storage shelf for a septic tank or a fence, pergola, or partition for construction, or a fruit shelf / decorative shelf for agriculture or gardening, or a vine plant pillar. The present invention relates to a method for manufacturing a synthetic resin lattice plate.

[0002]

2. Description of the Related Art Recently, the deterioration of water quality in rivers and lakes has become a problem, and the improvement of the discharge of domestic miscellaneous wastewater has been called for, and household combined treatment septic tanks for treating wastewater and miscellaneous wastewater in combination are becoming widespread.

This household combined septic tank is equipped with an anaerobic filter bed tank for purifying sewage with anaerobic microorganisms, an aeration tank for purifying sewage with aerobic microorganisms, and a sedimentation tank, a disinfection tank, etc. having other functions. There is.

The anaerobic filter bed tank and the aeration tank are equipped with a filter medium for allowing microorganisms to inhabit. Especially, in the anaerobic filter bed tank, in order to prevent the filter medium from moving due to the flow of sewage, the lower part of the filter medium is prevented. And the upper part is held by the filter media storage shelf.

Although a net made of a soft thermoplastic synthetic resin has been often used for such a filter medium storage shelf, it has a difficulty in fixing strength and attachment workability of the filter medium and is a glass fiber reinforced plastic (FRP) which is strong as a single member. It is being replaced with a lattice plate made of hard or thermoplastic synthetic resin.

On the other hand, aluminum is often used in building ancillary equipment such as building fences, pergola and partitions, but aluminum alloys are difficult to bend and join. However, it is being replaced with a lattice plate made of glass fiber reinforced plastic (FRP) or hard thermoplastic synthetic resin, which can be freely shaped and colored.

[0007] Further, in agricultural and horticultural fruit shelves, display shelves, vine plant stanchions, etc., steel pipes that have been subjected to surface treatment such as rust-preventive plating or rust-preventive coating and synthetic resin treatment are used. There is difficulty in corrosion resistance or workability according to the purpose, aesthetics after installation, etc. Especially for gardening, a wooden lattice (trellis) is popular, but it is difficult to prevent mold and corrosion. It is expected to be replaced with a grid plate made of a hard thermoplastic synthetic resin, which has excellent corrosion resistance, can be colored freely, and can be kneaded with an antibacterial agent (for example, silver-based or titanium-based).

Japanese Patent No. 2918872 has already been known as a method for manufacturing these lattice plates made of hard thermoplastic synthetic resin. That is, by extrusion molding, in the concave ridge portion of the thermoplastic synthetic resin original plate in which a large number of concave ridge portions and convex ridge-shaped convex ridge portions of the U-shaped groove facing the upper and lower surfaces are alternately formed,
Cuts for determining the size of the grid are intermittently provided at equal pitches in the groove direction, and subsequently, in the heated state, these groove parts are moved in the direction orthogonal to the groove, and the grid of any size is formed. Is what you get.

The rigid thermoplastic synthetic resin lattice plate produced by such a manufacturing method has sufficient strength for fixing the filter medium as a filter medium storage shelf for the septic tank, and the lattice size for preventing the filter medium from being pulled out can be arbitrarily formed. Although it is also suitable for use in civil engineering / construction materials, agriculture / horticulture, etc., it was later discovered that the manufacturing method thereof had the following problems.

[0010]

That is, the manufacturing method in the embodiment shown in the above-mentioned Japanese Patent No. 2918872 is for moving the concave line portion of the thermoplastic synthetic resin original plate in the direction orthogonal to the concave line. , At least moving equipment corresponding to the length of the thermoplastic synthetic resin original plate is required. In other words, there is a problem that the size of the product that can be manufactured is restricted by the size of the moving equipment.

Further, there has been a problem that it is necessary to reheat the thermoplastic synthetic resin original plate cut into the moldable length to a heat deformation temperature peculiar to the synthetic resin.

Therefore, a main object of the present invention is to solve the above-mentioned problems and obtain a greater effect.

[0013]

In order to achieve such an object, the gist of the present invention is 1) a thermoplastic composite in which a large number of opposed concave and convex ridges are alternately formed on the upper and lower surfaces by extrusion molding. Cuts for obtaining grids are formed in the groove of the resin material at regular intervals in the groove direction, and then immediately provided, and subsequently passed between the divergent guides fitted to the groove. In the method for manufacturing a thermoplastic synthetic resin lattice plate in which a lattice plate of a predetermined size is continuously obtained by the above, in the guide tool, a plurality of protruding strips for fitting the recessed strip portions to the base plate are formed. The ridges are provided so that the core wire spacing gradually increases from the inlet side to the outlet side of the thermoplastic synthetic resin material, and the substrate and the ridges are arranged in a pair of vertically facing directions. As if sandwiching the thermoplastic synthetic resin material Then, by moving the material from the inlet side to the outlet side by the pushing force of the extrusion molding, the cuts are opened to form a grid, a septic tank filter medium storage shelf or civil engineering / construction materials, agricultural The method for producing a thermoplastic synthetic resin lattice plate for horticulture, and 2) a straight line that radially spreads the core wire, or each of the inlet side and the outlet side has a smooth curved line. 3. The thermoplastic synthetic resin according to claim 1 or 2, which is in the method for producing a thermoplastic synthetic resin lattice plate described above, and 3) after passing through the guide tool to expand to a predetermined width and then cutting with a cutting device. It is in the method of manufacturing a grid plate.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a flow chart of a manufacturing process including an embodiment of the present invention, FIGS. 2 to 5 are plan views and sectional views of an embodiment of the present invention, and FIG. 6 is a cut of a thermoplastic synthetic resin material. FIG. 7 is a plan view of the state, FIG. 7 is a cross-sectional view in a width direction in which a thermoplastic synthetic resin material is cut, and FIG. 8 is a partial perspective view of a thermoplastic synthetic resin lattice plate obtained by the present invention. .

In the flow chart of the manufacturing process including the embodiment of the present invention shown in FIG. 1, the shape of the thermoplastic synthetic resin material 1 extruded from the thermoplastic synthetic resin extrusion molding device 5 is adjusted by the shaping mold 6. After that, a slit 4 having a predetermined length corresponding to the size of the grid 12 of the thermoplastic synthetic resin grid plate 11 is made by the cutting device 7, and the thermoplastic synthetic resin material 1a having the cut 4 is made into a book. After passing through between the divergent guides 8 according to the invention and expanding to a predetermined size of the grid 12, the cooling device 9
Is cooled to a temperature not higher than the thermal deformation temperature of the thermoplastic synthetic resin, solidified, and cut by the cutting device 10 to obtain a grid 1 of the desired size.
2 shows a step of obtaining a thermoplastic synthetic resin lattice plate 11 having 2 and having a predetermined width and length.

As shown in FIG. 2, the guide member 8 has a plurality of protrusions 8b provided upright on a base plate 8a of the guide member 8 and
b is provided so that the core wire interval gradually increases from the inlet side 13 to the outlet side 14 of the thermoplastic synthetic resin material 1a. That is, it is provided in a divergent shape.

The base plate 8a and the protrusions 8b of the guide tool 8
Are provided so as to be opposed to each other in the vertical direction and sandwich the thermoplastic synthetic resin material 1a therebetween. Therefore,
Stretching in the direction orthogonal to the concave line is ensured without coming off.

The thermoplastic synthetic resin material 1a is guided by fitting a protruding strip 8b provided on the guide 8 into a recessed portion 2 having a substantially U-shaped cross section formed in the thermoplastic synthetic resin material 1a. By moving the tool 8 from the inlet side 13 to the outlet side 14, the cuts 4 are opened (stretched) to form a lattice shape, and the entire width of the thermoplastic synthetic resin material 1a is widened so that the thermoplastic synthetic resin material having a predetermined width is formed. 1b is obtained.

The core wire of the protrusion 8b may be a straight line extending radially as shown in FIG. 2, but a smooth streamline curve (not shown) near the inlet side 13 and near the outlet side 14
By this, the thermoplastic synthetic resin material 1a becomes easier to move. Of course, this thermoplastic synthetic resin material 1
The movement of a is performed by the pushing force of the extrusion molding device 5 and the pulling force by a guide roll (not shown).

Incidentally, the cut size of the cut 4 to be inserted in the recess 2 of the thermoplastic synthetic resin material 1a is such that when the grid 12 is a substantially regular hexagon and the inscribed circle is 80 mm, the cut length 13
The length is 8 mm and the length without cut is 46 mm, and a pair of combined intervals of 184 mm is repeated. In particular, cuts 4 of the same size are made in the next-to-be-adjacent row of the recessed stripes 2 at positions shifted by ½ length of 184 mm so that the cuts 4 are staggered.

Even at the same cut size, the exit side 1 of the guide tool 8
The shape of the grid 12 changes depending on the width of 4, and if the width is reduced, the inscribed circle becomes smaller, and the hexagon becomes a hexagon longer than the regular hexagon and collapses in the length direction of the thermoplastic synthetic resin material 1a. .

4 and 5 show another reference example of the guide tool 8. This guide tool 8 has a plurality of disc-shaped (preferably an elliptical disk having an elliptical cross section as shown in the figure) linking guide plates 8f. The rotating bodies 8c and 8e and the independent rotating body 8d are formed in a divergent shape as a whole. As shown in FIG. 5, the disc-shaped guide plates 8f are constituted by a pair of vertically facing each other with the thermoplastic synthetic resin material 1a interposed therebetween.

The disc-shaped guide plate 8 of the guide 8 is provided in the recessed portion 2 having a substantially U-shaped cross section formed on the thermoplastic synthetic resin material 1a.
By fitting f and moving the thermoplastic synthetic resin material 1a from the inlet side 13 to the outlet side 14 of the guide tool 8 while forcibly rotating or rotating on its own, the cuts 4 are opened to form a lattice-like thermoplastic composite. The fact that the entire width of the resin material 1a is expanded to obtain the thermoplastic synthetic resin material 1b having a predetermined width is exactly the same as when molding is performed using the guide tool 8 shown in FIG.

The thermoplastic synthetic resin material 1b expanded to a predetermined width by the guide 8 described with reference to FIGS. 2, 3 and 4 and 5 is used in the cooling device 9 for the thermal deformation temperature of the thermoplastic synthetic resin. It is cooled and hardened below, and is cut with the saw blade of the cutting device 10 to determine the length in the longitudinal direction and cut, and has the grid 12 of the desired size and has a predetermined width and length. The resin lattice plate 11 can be obtained.

The length of the thermoplastic synthetic resin lattice plate 11 in the flow direction can be set to an arbitrary dimension by adjusting the extrusion molding speed of the thermoplastic synthetic resin material 1 and the cutting interval time of the cutting device 10.

The thermoplastic synthetic resin lattice plate 1 as described above
The size of 1 depends on the application, but as a filter media storage shelf for septic tank, width 650 to 1200 mm, length 700 to 250
0 mm width, width 60 for civil engineering, construction, farming and gardening
0, 900, or 1200 mm, length 900, 120
Places of 0 or 1800 are common, but there is a demand for even larger dimensions.

The material of the thermoplastic synthetic resin material 1 may be hard vinyl chloride resin, or other thermoplastic synthetic resin such as acrylic resin, high density polyethylene resin, ABS resin, polypropylene resin. Good.

The guide 8 may be an integral type as shown in FIG. 2, but if it does not hinder the movement of the thermoplastic synthetic resin material 1a, it is divided into a plurality of pieces in the flow direction and installed separately (not installed). It may be shown).

Also in FIG. 4, the disc-shaped guide plate 8 of the guide tool 8 is used.
The f's can be operated in the same manner even if they are all connected one by one, or if they are all alone.

Further, in the guide tool 8 using the disc-shaped guide plate 8f shown in FIG. 4, the installation position of the disc-shaped guide plate 8f can be easily changed, and the thermoplastic synthetic resin grid plate 11 is different from the guide tool 8 shown in FIG. Has a high degree of freedom in arbitrarily taking the width dimension of the, and assists the movement of the thermoplastic synthetic resin material 1b.

[0031]

According to the present invention, a thermoplastic synthetic resin lattice plate having an arbitrary length can be obtained without being restricted by the size of the expanding device, and the flexibility of applied products can be greatly expanded. be able to.

Further, since the reciprocating motion of the expanding device is eliminated and the material can be expanded continuously by moving in one direction, in particular, a pair of upper and lower parts that fit in the recessed portions of the upper and lower surfaces of the material. Since it is sandwiched by the protruding strips, the material can be reliably stretched in the direction orthogonal to the recessed strips without coming off, and the productivity can be greatly improved compared to the manufacturing method of the embodiment of the patent.

Furthermore, since the thermoplastic synthetic resin material is not cut after cooling and reheated from room temperature to the heat distortion temperature to be expanded, the reheating and recooling energy can be saved, which is economical. Not only that, but productivity can be improved and production cost can be reduced.

[Brief description of drawings]

FIG. 1 is a flow chart of a manufacturing process including an exemplary embodiment of the present invention.

FIG. 2 is a plan view showing an exemplary embodiment of the present invention.

3 is a cross-sectional view of FIG.

FIG. 4 is a plan view showing another reference example of the present invention.

5 is a cross-sectional view of FIG.

FIG. 6 is a plan view showing a state where a cut is made in a thermoplastic synthetic resin material.

FIG. 7 is a cross-sectional view in the width direction in a state where a cut is made in a thermoplastic synthetic resin material.

FIG. 8 is a partial perspective view of a thermoplastic synthetic resin lattice plate obtained by the present invention.

[Explanation of symbols]

1, 1a, 1b ... Thermoplastic synthetic resin material, 2 ... Recessed ridge, 3 ... Relief, 4 ... Cut, 5 ... Extrusion molding device, 6 ...
Adjusting mold, 7 ... Notching device, 8, 8a, 8b, 8c, 8
d, 8e, 8f ... Guide tool, 9 ... Cooling device, 10 ... Cutting device, 11 ... Thermoplastic synthetic resin lattice plate, 12 ... Lattice,
13 ... Entrance side, 14 ... Exit side

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-198249 (JP, A) JP-A-2001-47495 (JP, A) Seki 53-84641 (JP, U) JP-B-40-1115 (JP, B1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B29C 47/00-47/96 B29D 1/00-31/02

Claims (3)

(57) [Claims] 1. A groove for obtaining a lattice is formed in the groove of a thermoplastic synthetic resin material in which a large number of opposed groove and convex are alternately formed on the upper and lower surfaces by extrusion molding. A thermoplastic compound which is provided immediately after being formed at regular intervals in the direction of the groove and is then continuously passed through between divergent guides fitted to the groove to continuously obtain a grid plate of a grid of a predetermined size.
In the method for manufacturing a synthetic resin lattice plate, the guide is provided with a large number of projections in which the recesses are fitted to the substrate.
And the protrusions are made of the thermoplastic synthetic resin material.
As the distance from the entrance side to the exit side gradually increases,
So that the board and the protrusions are
The thermoplastic synthetic resin is composed of a pair of lower facing directions.
It is provided so as to sandwich the fat material, and the material is inserted from the inlet side.
Move to the outlet side by the extrusion force of the extrusion molding
Thus, the manufacturing method of a septic tank filter medium storage shelf or a thermoplastic synthetic resin lattice plate for civil engineering / construction materials, agriculture, and horticulture, characterized in that the cuts are opened to form a lattice pattern. 2. A straight line that radially extends the core wire, or
A smooth curve in the vicinity of the inlet side and the outlet side
The method for manufacturing the thermoplastic synthetic resin lattice plate according to claim 1. 3. Forming into a predetermined width by passing through the guide tool
The thermoplastic synthetic resin grid plate according to claim 1, which is then cut by a cutting device .