JP2000102935A - Centrifugal molding with lateral hole rib - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain excellent durability without corrosion by reacting a reaction stock solution in the state that a centrifugal force is applied to the solution in a mold. SOLUTION: In order to start molding, a mixer is controlled, a liquid containing a norbornene monomer and an activator and a liquid containing a norbornene monomer and a metathesis catalyst are mixed. The mixed reaction stock solution is supplied from a through hole 5 of a mold 2 into the mold 2 by using a nozzle or the like. A viscosity of the solution supplied into the mold 2 is 50 to 1,000 cps at 30 deg.C. The mold 2 is rotated, and the solution is cylindrically adhered to an inner periphery of the mold 2 by a centrifugal force. In this case, the solution is also adhered in a predetermined thickness to an interior of a protrusion 7 formed with a circular recess. The mold 2 may be heated by utilizing heating medium, warm air or the like from a view point of easily bringing about a polymerization reaction. This state is held until a bulk polymerization is finished to obtain a cylindrical molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal centrifuge with a horizontal hole rib which is preferably used, for example, as a body of a water collecting mass of a water collecting facility installed on the side of a road for collecting and flowing water falling on the road. Related to molded articles.

[0002]

2. Description of the Related Art For example, a water collecting facility for collecting and flowing water falling on a road is installed on the side of a road such as a highway. The water collecting equipment includes a perforated pipe, a non-perforated pipe, and a water collecting mass. A perforated pipe is a pipe with a large number of holes communicating with the inside of the pipe on the outer peripheral surface to collect water in the soil.
It is made of vinyl chloride resin. The non-perforated pipe is a pipe for connecting the water collecting masses, and is currently formed of a fume pipe or the like. The water collecting mass is for connecting the non-perforated pipe and the perforated pipe, and collects water collected by the perforated pipe. The water collecting mass generally has a body for the water collecting mass and a manhole part mounted on the body. Conventionally, the body for collecting water mass is made of concrete.

[0003] In order to construct a water collecting mass on a road, a road bed is made, a hole is dug along the longitudinal direction of the road, and a concrete water collecting mass body is installed there. After that, the roadbed was made on the roadbed, the roadbed was dug, the manhole part was attached to the body for the water collecting mass, and finally the road surface was paved.

[0004]

As described above, since the conventional body for collecting water is made of concrete, it has a problem that its weight is heavy and its construction is not easy. Further, the body for the concrete collecting mass easily corrodes in the ground, and has a problem in durability.

Although attempts have been made to form the water collecting mass body with a synthetic resin, it is easy to form a relatively large molded body such as the water collecting mass body with a synthetic resin. is not. For example, if the body for the water collecting mass is to be formed by extrusion molding of polyethylene, an extrusion die corresponding to the outer diameter of the water collecting mass is required, and the manufacturing equipment becomes large. In addition, the body for collecting water mass needs a part for connecting a non-perforated pipe or a perforated pipe, but it is difficult to integrally form that part by extrusion molding.

The present invention has been made in view of the above circumstances, and it is possible to produce a molded article with a lateral hole rib such as a body for a water collecting mass using a synthetic resin very easily and at a low cost. It is an object of the present invention to provide a centrifugally formed body with horizontal ribs and a body for collecting water, which is excellent in durability without corrosion.

[0007]

In order to achieve the above object, a centrifugally formed article with a lateral hole rib according to the present invention reacts an undiluted reaction solution in a mold under centrifugal force. And obtained by polymerization. The centrifugally formed body with the ribs is used, for example, as a body for collecting water.

[0008] The centrifugally formed body with lateral ribs according to the present invention is obtained by reacting and polymerizing a reaction stock solution containing a norbornene-based monomer in a mold under centrifugal force. Is preferred.

In centrifugal molding, the rotational angular velocity ω of the mold is
1.0 of the reference rotational angular velocity ω ₀ derived from the following equation
It is preferred that the reaction stock solution in the mold is reacted and polymerized while rotating the mold so that the ratio becomes 1 to 2.0 times.

[0010]

Ω ₀ = {3 g / (R−b)} ^1/2 (1) where g is the gravitational acceleration, R is the inner diameter of the mold cavity,
b is the average radial thickness of the reaction solution present in the mold.

The acceleration applied to the reaction solution in the mold is not particularly limited, but is 1 G or more and 5 G or less, preferably 1 G or more and 4 G or less, particularly preferably 1.2 or more and 4 G or less.

Although the mold is not particularly limited, for example, a mold made of a material that is non-adhesive to the molded body can be used.

Reaction stock solution The reaction stock solution is not particularly limited, but may be a urethane type,
Examples thereof include urea-based, nylon-based, epoxy-based, unsaturated polyester-based, phenol-based, and norbornene-based ones, and particularly preferred are norbornene-based ones. The temperature of the reaction solution before it is put into the mold is preferably 20 to 80 ° C., and the viscosity of the reaction solution at 30 ° C. is, for example, preferably about 20 cps to 1000 cps, and more preferably about 30 cps to 700 cps. If the viscosity of the reaction solution is too low, the reaction solution tends to stay at the bottom without centrifugal force acting.If the viscosity is too high, it is difficult to form a free form using acceleration. There is a tendency.

In such molding, a reinforced polymer (molded body) can be produced by placing a reinforcing material in a mold in advance and supplying a reaction liquid therein to polymerize.

Examples of the reinforcing material include glass fiber, aramid fiber, carbon fiber, ultra high molecular weight polyethylene fiber, metal fiber, polypropylene fiber, aluminum coated glass fiber, cotton, acrylic fiber, boron fiber, silicon carbide fiber, and alumina fiber. And the like. These reinforcing materials can be used in various shapes, such as those obtained by forming a long fiber or chopped strand into a mat, woven into a cloth, or remaining in a chopped shape. It is preferable that the surface of these reinforcing materials is treated with a coupling agent such as a silane coupling agent in order to improve the adhesion to the resin. The amount to be used is not particularly limited, but is usually 10% by weight or more, preferably 20 to 60% by weight of the total weight of the molded article.

Also, various additives such as an antioxidant, a filler, a pigment, a colorant, a foaming agent, a flame retardant, a sliding agent, an elastomer, a dicyclopentadiene-based thermopolymerized resin and a hydrogenated product thereof are blended. Thereby, the properties of the obtained polymer can be modified.

As antioxidants, there are various antioxidants for plastics and rubbers such as phenols, phosphorus compounds and amine compounds. Fillers include inorganic fillers such as milled glass, carbon black, talc, calcium carbonate, aluminum hydroxide, mica, potassium titanate, calcium sulfate, and the like. Examples of the elastomer include natural rubber, polybutadiene, polyisoprene, styrene-butadiene copolymer (SBR), styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), and ethylene- Examples include propylene-diene terpolymer (EPDM), ethylene vinyl acetate copolymer (EVA) and hydrides thereof. The additive is usually mixed in advance with one or both of the reaction solutions.

[0018] After placing the interior reaction stock solution of the mold die has a structure such that it can apply a centrifugal acceleration to the reaction stock solution inside the mold. For example, a mold is rotatable around one axis or multiple axes. By rotating the mold, an acceleration due to centrifugal force acts on the reaction solution inside the mold.

The temperature of the mold is preferably between 10 and 150
° C, more preferably 20 to 120 ° C, still more preferably 30 to 100 ° C. Before injecting the unreacted solution into the mold, warm air is circulated inside the mold, and at least the inside of the cavity of the mold is heated to a predetermined temperature. The molding may be performed by pouring the unreacted solution into the cavity.

The material of the mold used in the present invention is as follows.
Although not particularly limited, a material having good adhesiveness to the mold and a material that is non-adhesive to the molded body is preferable in order to obtain a molded body having a smooth outer peripheral surface, for example, cast iron,
Metals such as iron, stainless steel, aluminum and nickel electroformed are preferred. However, in the present invention, a synthetic resin or another material may be used without necessarily using a material that does not adhere to the molded body. Reactive polymerization molding can be performed at a relatively low pressure, and it is not necessary to use a highly rigid mold.

When the mold which is not adhered to the molded body is made of a synthetic resin, the synthetic resin may be a polar resin such as fiber reinforced plastic (FRP), phenol or polyester. Since such a mold is not integrated with the reactive polymer molding, the mold apparatus can be removed and used repeatedly for each reactive polymerization molding.

The mold is preferably a split mold that can be formed into a free shape. It is also preferable to apply wax, a lubricant, or the like in advance along the inner peripheral surface of the mold before injecting the stock solution in order to improve the releasability.

The polymerization time may be appropriately selected, but when centrifugal force is applied after the completion of the injection of the reaction solution, it takes several seconds to several tens of seconds to raise the mold to a predetermined rotation speed. Is 5 to 30 seconds, more preferably 5 to 15 seconds.
Seconds.

[0024]

The centrifugally formed article with lateral ribs according to the present invention can be easily and inexpensively integrated by centrifugal molding using the above-described reaction stock solution. Further, since the horizontal hole rib is formed integrally with the molded product with the horizontal hole rib, a pipe or the like can be very easily connected thereto. Furthermore, since the centrifugally formed body with the lateral ribs is a synthetic resin formed by centrifugal molding using a reaction stock solution, it is lighter and more excellent in corrosion resistance than concrete.

The body for a water collecting mass according to the present invention can be integrally and easily formed at low cost by centrifugal molding using the above-mentioned reaction stock solution containing a norbornene-based monomer. In addition, since the body for the water collecting mass can be freely formed, by forming the side hole rib integrally with the body,
Perforated pipes and non-perforated pipes can be connected very easily there, and construction of water collecting equipment is easy. Further, since the body for the water collecting mass is a synthetic resin formed by centrifugal molding using a reaction stock solution containing a norbornene-based monomer, it is lighter than concrete and has excellent corrosion resistance, and has excellent water collecting properties. It has sufficient strength as a mass fuselage.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a perspective view of a centrifugal molded body with a lateral hole rib according to one embodiment of the present invention, FIG. 2 is a perspective view of a mold for molding the centrifugally molded body with a lateral hole rib, and FIG. III-I shown in 2
FIG. 4 is a front view of the mold along the line II, FIG. 4 is a perspective view showing a state in which a rolling ring is attached to the mold shown in FIG. 2, FIG. 5 is a side view thereof, FIG. FIG. 8 is a side view of a driving device for rotating the mold, FIG.
(A)-(E) is sectional drawing which shows the construction method of a catchment mass.

As shown in FIG. 1, the centrifugally formed body 30 with ribs according to the present embodiment has a cylindrical shape as a whole.
The outer peripheral surface has three cylindrical ribs 32 each having a lateral hole 31 formed therein. This centrifugally formed body 30 with ribs for lateral holes
Is obtained by reacting the undiluted reaction solution containing the norbornene-based monomer present in the mold under a centrifugal force to cause the undiluted reaction solution to polymerize.

In this embodiment, the rotational angular velocity ω of the mold is
1.0 of the reference rotational angular velocity ω ₀ derived from the following equation
The reaction stock solution in the mold is reacted and polymerized while rotating the mold so that the ratio becomes 1 to 2.0 times.

[0030]

Ω ₀ = {3 g / (R−b)} ^1/2 (1) where g is the gravitational acceleration, R is the inner diameter of the mold cavity,
b is the average radial thickness of the reaction solution present in the mold.

The average thickness b in the radial direction of the reaction stock solution is given by b = V _f /, assuming that the inside of the cavity of the mold is a cylindrical surface.
(2πRλ). Here, _Vf is the volume of the reaction solution put into the mold, and λ is the axial length of the cavity of the mold.

In this embodiment, the mold 2 shown in FIGS. 2 to 6 is used to rotate the mold at a rotational angular velocity in the above range.

The mold 2 of the present embodiment has a split mold 4 that can be divided into two along the split surface 3 in the vertical direction. In the state where the split molds 4 are combined, three convex portions on the outer periphery of the mold 2 are formed with cylindrical recesses for forming the cylindrical ribs 32 of the centrifugally molded body 30 with the lateral hole ribs. 7 is formed.

A rolling ring 8 is attached to the outer periphery of both ends of the mold 2 from the axial direction in a state where the split mold 4 is combined with the outer periphery of both ends of the mold 2. The split mold 4 is made of, for example, an aluminum casting, and the rolling ring 8 is made of cast iron.

The split surface 3 of the split mold 4 is preferably provided with the following sealing material. By installing the sealant, it is possible to prevent inconvenience such as leakage of the undiluted reaction solution from the split surface 3.

That is, the sealing material suitable for use in the present embodiment is not particularly limited, and a silicone rubber sealing material or a sealing material shown below can be used.

The sealing material of the present embodiment is a sealing material containing clay as a main component. Clay, the main component of this sealing material, is an aggregate of hydrated silicate minerals, which shows plasticity when mixed with an appropriate amount of water, shows rigidity when dried, and sinters when baked at high temperatures It is defined as such a substance, and its chemical components mainly consist of silicon, aluminum, magnesium, alkali metals, alkaline earth metals and moisture.

Examples of fillers that can be used together with clay include mica, silica, calcium carbonate, clay (aluminum silicate), talc, diatomaceous earth and the like.
In the sealing material, as other components, preferably contains a petroleum-based or mineral oil-based softener such as aromatex, naphthene, paraffin, white oil, petrolatum, petroleum sulfonate, or a vegetable oil-based softener. May be contained alone or in combination.

The content of the clay component in the sealing material is preferably 30 to 10 with the whole sealing material being 100% by weight.
0% by weight, more preferably 40 to 80% by weight.
The content of the filler in the sealing material is preferably from 0 to 70% by weight, more preferably from 10 to 50% by weight, based on 100% by weight of the whole sealing material. Further, the content of other components in the sealing material is 100% for the entire sealing material.
The weight percentage is preferably 10 to 40% by weight, more preferably 20 to 30% by weight.

The sealing material is formed, for example, in the form of a string having a circular or elliptical cross section. In use, the sealing material is cut into a predetermined length and mounted in a gap to be sealed. Further, this sealing material can be used in combination with a conventional sponge packing or the like.

An inner peripheral surface is formed inside the split mold 4 combined with the split surface 3, and a reaction stock solution having a predetermined viscosity is pressed against the inner peripheral surface by centrifugal force. I have. End plates 6 and 6 are formed at both ends in the axial direction of the split mold 4 so that the through holes 5 are formed. A nozzle for supplying the undiluted reaction solution is inserted from the through hole 5, so that the undiluted reaction solution can be supplied into the mold 2.

As shown in FIGS. 7 and 8, a pair of flanged drive rollers 12 is engaged with one rolling ring 8 of the mold 2, and a pair of flanged driving rollers 12 is engaged with the other rolling ring 8. The drive roller 14 without the lock is engaged. These drive rollers 12 and 14
And a constant torque inverter motor 18,
They all rotate at substantially the same rotation speed. When these drive rollers 12 and 14 are all rotated at substantially the same rotational speed, the rolling ring 8 engaged with them is also rotated around its axis, and the mold 2 composed of the split dies 4 and 4 is also rotated. At the same time, it rotates around the axis. The driving rollers 12, 1
4. The transmission 16 and the motor 18 are mounted on a base 20. The reason why the one driving roller 12 in the axial direction is provided with a flange is that the flange restricts the axial movement of the rolling ring 8, thereby restricting the axial movement of the mold 2. Drive rollers 12, 14 in both axial directions
May be provided with a flange, but only one of them can sufficiently restrict the axial movement of the mold 2.

Next, a method for forming the centrifugal molded body 30 with the ribs on the side holes by the reactive polymerization molding method using the mold 2 will be described. First, as shown in FIGS. 2 and 3, the split dies 4 and 4 are combined. Then, as shown in FIGS. 4 and 8, the rolling rings 8 and 4 are attached to both ends of the combined split dies 4 and 4, respectively. 8 is mounted, and the mold 2 is assembled. Next, the mold 2 is mounted on the driving rollers 12, 1 shown in FIGS.
4, and is rotatably mounted.

Thereafter, reactive polymerization molding is performed. The reactive polymerization molding performed in the present embodiment is a molding using a norbornene-based monomer. Specific examples of the norbornene-based monomer to be used include bicyclics such as norbornene and norbornadiene; dicyclopentadiene (cyclopentadiene dimer). ), Tricyclics such as dihydrodicyclopentadiene; tetracyclics such as tetracyclododecene; pentacyclics such as cyclopentadiene trimers; heptacyclics such as cyclopentadiene tetramers; methyl, ethyl, Substituents such as alkyl such as propyl and butyl, alkenyl such as vinyl, alkylidene such as ethylidene, and aryl such as phenyl, tolyl and naphthyl; and further having polar groups such as ester group, ether group, cyano group and halogen atom. Substitutes are exemplified. These monomers may be used in combination of one or more kinds. It is easy to obtain, excellent in reactivity,
From the viewpoint of excellent heat resistance of the obtained resin molded body, tricyclic,
Tetracyclic or pentacyclic monomers are preferred.

The resulting ring-opening polymer is preferably of a thermosetting type. For this purpose, among the norbornene-based monomers described above, it has two or more reactive double bonds such as cyclopentadiene trimer. Those containing at least a crosslinkable monomer are used. The proportion of the crosslinkable monomer in all the norbornene monomers is preferably from 2 to 30% by weight.

It should be noted that, within a range not to impair the object of the present invention,
Monocyclic cycloolefins such as cyclobutene, cyclopentene, cyclopentadiene, cyclooctene and cyclododecene, which can be ring-opening copolymerized with norbornene monomers,
It may be used as a comonomer.

The metathesis catalyst which can be used in the molding using the norbornene-based monomer is a norbornene-based catalyst such as tungsten hexachloride or an organic ammonium salt of molybdate such as tridodecyl ammonium molybdate or tri (tridecyl) ammonium molybdate. There is no particular limitation as long as it is a known metathesis catalyst as a catalyst for bulk polymerization of monomers, but an organic ammonium molybdate is preferred.

As the activator (cocatalyst), JP-A-58-1983
127728, JP-A-4-226124,
JP-A-58-129003, JP-A-4-1452
There is no particular limitation as long as it is a known activator as disclosed in Japanese Patent No. 47, for example, alkyl aluminum halides such as ethyl aluminum dichloride and diethyl aluminum chloride, organic aluminum compounds such as alkoxyalkyl aluminum halides, and organic tin. And the like.

As preparations before molding, a molding material mainly composed of a norbornene-based monomer, a metathesis catalyst and an activator was mixed with a solution B comprising a norbornene-based monomer and a metathesis catalyst, and the above-mentioned norbornene-based monomer and activator. The liquid is divided into two stable liquids and the liquid A, each of which is placed in a separate tank.

To start molding, control the mixer,
The solution A and the solution B from the tank are mixed, and the mixed solution is used as a reaction stock solution by using a nozzle or the like to form the through-hole 5 of the mold 2.
From the mold 2. The viscosity of the reaction solution supplied into the mold 2 is 50 cps to 10 at 30 ° C.
By rotating the mold 2, the undiluted reaction solution sticks to the inner peripheral surface of the mold 2 in a cylindrical shape due to the centrifugal force. As shown in FIG. 6, the undiluted reaction solution also adheres to the inside of the convex portion 7 having the columnar depression with a predetermined thickness.

In the present embodiment, the mold 2 does not necessarily need to be heated, but may be heated using a heat medium or warm air from the viewpoint of facilitating the polymerization reaction.

The rotational angular velocity of the mold 2 is calculated by the above-described equation.
Reference rotation angular velocity ω derived from (1)₀ 1.01 times of
Are set to be in a range of 2.0 times. Mold 2 key
The radius R of the inner peripheral surface of the cavity is 0.3 m,
When the axial length λ is 1.0 m,
The volume Vf of the solution was 1.84 × 10^-2m³Place
In this case, the reference rotational angular velocity ω₀Is about
10.1 rad / sec. Therefore, in that case
Is the rotational angular velocity of the mold, the reference rotational angular velocity ω₀ 1.
10.2 to 20.2r in the range of 01 to 2.0 times
Set to ad / sec.

The initial start-up time required for rotating the mold 2 at a constant rotational angular velocity about its axis is generally about several seconds to about 30 seconds. By the time the required rotational angular velocity has been reached, it can be longer than 30 seconds. After the required rotational angular velocity is reached, the mold is rotated at a constant rotational angular velocity. Since it is sufficient that the reaction stock solution has reached the required rotational angular velocity before the gel time, the mold 2
May be rotated around the axis at a constant rotational angular velocity, and then a reaction solution may be supplied through a through-hole 5 through a nozzle.

By rotating the mold 2 around its axis at a constant rotational angular velocity, the unreacted solution supplied to the inside of the mold 2 is formed into a cylindrical shape on the inner peripheral surface of the mold 2 by centrifugal force. By sticking the state to the end of the bulk polymerization, a cylindrical molded body can be obtained.

Then, after the rotation of the mold 2 is stopped and the mold 2 is cooled, the rolling ring 8 is removed from the state shown in FIGS. 4 and 5 to the state shown in FIGS. 2 and 3. When the split dies 4 and 4 are opened, a centrifugal molded body 30 with a lateral hole rib formed of a cylindrical molded body as shown in FIG. 1 can be obtained. The centrifugal molded body 30 with the lateral hole ribs is formed of a reactive polymer molded body of a norbornene-based monomer, and three cylindrical ribs 32 are integrally molded on the outer periphery thereof. In addition, as shown in FIG. 6, a lid 32a is also integrally formed with each of the cylindrical ribs 32 immediately after molding, so as shown in FIG.
It is removed by processing, and a lateral hole 31 is opened.

In the method according to the present embodiment, by applying a centrifugal force to the reaction solution, bubbles are separated from the reaction solution by the centrifugal force during molding, and voids are eliminated in the obtained molded product.

Further, the inner peripheral surface of the centrifugally formed body 30 with the ribs shown in FIG. 1 obtained by the method of the present embodiment is a surface obtained by centrifugal force without touching anything during the forming process. Therefore, there is no inconvenience such as poor curing of the reaction stock solution during molding, and the inner peripheral surface is smooth. In particular, by setting the rotational angular velocity of the mold to the rotational angular velocity in the specific range described above, a centrifugally formed body with a lateral hole rib having a smooth inner peripheral surface without undulation can be formed. The centrifugal molded body 30 with the lateral hole rib thus obtained is used, for example, as a body for a water collecting mass.
Perforated or non-perforated pipes are connected. Note that, since the centrifugally formed body 30 with the lateral hole ribs is open at both ends in the axial direction, when used as a water collecting mass, one end in the axial direction (near the rib 32) is provided with a disc-shaped lid. Is connected. The lid may be adhered to the molded body 30, but does not necessarily have to be adhered. This is because even if the water stored inside the catchment mass leaks somewhat, it is absorbed into the soil. A manhole is connected to the other end in the axial direction of the centrifugally formed body 30 with ribs (ends away from the ribs 32).

The centrifugal molded product 30 with ribs on the side hole obtained by the method according to the present embodiment is made of a polymer obtained by utilizing a bulk polymerization reaction of a norbornene-based monomer. And excellent mechanical properties such as durability. Further, according to the method of the present embodiment, it is possible to relatively easily mold even the molded body 30 with the lateral hole rib having a relatively large diameter.

Further, in the present embodiment, the split dies 4, 4 are used, and rolling rings 8, 8 are mounted on the outer periphery thereof, and the dies 2 are mounted on the shaft center by using the rolling rings 8, 8. Since it is rotated around, it is possible to realize both the free-form molding of the molded body by using the split mold and the rotation using the ring with little rotational fluctuation. In addition, if rotational blur occurs, the rotational blur can be suppressed by shaving the outer circumference of the rings 8 during rotation. Further, replacement of the rings 8, 8 is also easy.

Next, based on FIG. 9, the centrifugally formed body 30 with the lateral hole ribs according to the present embodiment is used as a body for a water collecting mass.
A method for constructing a road water collecting facility will be described.

As shown in FIGS. 9A and 9B, first, a slope 40 on which a road is to be formed is excavated to form a subgrade. Next, as shown in FIG. 9 (C), a hole 44 is dug along the longitudinal direction of the subgrade 42, and as shown in FIG. 9 (D),
A centrifugal molded body 30 with a horizontal hole rib as a body for a water-collecting mass having a lid at the bottom is arranged, and a perforated pipe and a non-porous pipe are rib 3
Connect to 2. Thereafter, as shown in FIG. 9 (E), the manhole part 34 is connected to the upper part of the molded body 30, and at the same time, the roadbed is formed and the road is constructed.

In the method of constructing a water collecting facility using the compact 30 according to the present embodiment, the compact 30 is light, so that the work is easy and the manhole portion 34 is mounted by digging back the roadbed. The workability is good without the need for.

Note that the present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention. For example, in the above-described embodiment, the mold 2 is rotated around one axis, but may be rotated around two or more axes.

[0064]

EXAMPLES Hereinafter, the present invention will be described based on more detailed examples, but the present invention is not limited to these examples.

Example 1 A mold 2 shown in FIGS. 2 to 6 was prepared and set on the driving rollers 12 and 14 of the mold rotating device shown in FIGS. The pair of split dies 4, 4 are made of aluminum casting,
The outer diameter of the mold is 1.3 m, the radius R of the cavity of the mold.
Was 1.0 m, and its axial length λ was 1.3 m. Through holes 5 in end plates 6 formed at both ends of split dies 4 and 4
Had an inner diameter of 0.21 m. The inner diameter of each of the cylindrical dents formed inside the three convex portions 7 formed in the mold 2 was 0.54 mm, and the axial length was 0.35 mm.

The split dies 4 and 4 were combined with the split face 3.
The split surface 3 was sealed using a string packing made of silicone rubber (round cross section φ6 mm).

The rolling rings 8, 8 were attached with the split surfaces 3 of the split dies 4, 4 sealed. Rolling ring 8,8
Was put on the drive rollers 12 and 14, and the reaction stock solution was supplied into the mold 2 by using a nozzle from the axial through hole 5 of the split mold. The preparation of the reaction stock solution was performed as follows. Using a mixed monomer composed of 85% by weight of dicyclopentadiene (DCP) and 15% by weight of tricyclopentadiene,
A styrene-isoprene-styrene block copolymer (Clayton 11) was added to 100 parts by weight of the total amount of the monomers.
70, manufactured by Shell Co., Ltd.) and 2 parts by weight of Irganox 1010 (Ciba Geigy), which is a phenolic antioxidant, are dissolved in two containers, and one of them is mixed with the monomer mixture. On the other hand, diethylaluminum chloride (DEAC) was added to a concentration of 40 mmol, n-propanol to a concentration of 44 mmol, and silicon tetrachloride to a concentration of 20 mmol (solution A). On the other hand, tri (tridecyl) ammonium molybdate was added at a concentration of 10 mmol to the mixed monomer (B
liquid).

The solution A and the solution B are sent to the mixer by a gear pump so as to have a volume ratio of 1: 1 and then supplied from the through hole 5 of the mold 2 to the inside of the mold 2 using a nozzle. did. The temperature of the reaction stock solution was 30 ° C., and its viscosity was 300 cps at 30 ° C.

The volume V _f = 4.1 in the cavity of the mold.
The reaction stock solution was supplied in an amount of 4 × 10 ⁻² m ^3. Immediately after the completion of the supply, the drive rollers 12 and 14 were rotated, and the mold 2 was rotated around its axis. In 15 seconds, the rotational angular velocity ω of the mold 2 became 8.14 rad / sec, and the speed was maintained. Since the reference rotational angular velocity ω ₀ derived from the above equation (1) was about 7.75, the actual rotational angular velocity ω of the mold was about 1.05 times ω ₀ . Also, when calculating the acceleration acting on the reaction stock solution,
3.38G.

After maintaining this state for 5 minutes, the rotation was stopped, the mold 2 was taken out, the rolling rings 8, 8 were removed, and the split dies 4, 4 were opened. A centrifugal molded body 30 with hole ribs was obtained.

For confirmation, this centrifugally formed body 3 with ribs for horizontal holes was used.
0 was cut at a plurality of locations, and the state of the cross section was examined, but no void was found. Further, when the inner peripheral surface of the molded body 30 was observed, it was confirmed that there was no defect such as poor curing and the inner peripheral surface was smooth without undulation. Also,
When the roundness of the cross section of the hollow portion of the pipe-shaped molded body was measured, it was close to the roundness, and it was confirmed that good roundness was obtained. Furthermore, the cylindrical rib 32 was also formed favorably. The lid 32a of the cylindrical rib 32 shown in FIG.
Was removed after molding. Molded object 30 according to the present embodiment
It was confirmed that can be used well as a body for collecting water.

[0072]

As described above, the centrifugally formed article with lateral ribs according to the present invention can be easily and inexpensively integrated by centrifugal molding using a reaction stock solution. Further, since the horizontal hole rib is formed integrally with the molded product with the horizontal hole rib, a pipe or the like can be very easily connected thereto. Furthermore, since the centrifugally molded body with the lateral hole ribs is a synthetic resin molded by centrifugal molding using a reaction stock solution, it is lighter than a concrete one,
Moreover, it has excellent corrosion resistance.

The body for water collecting mass according to the present invention can be easily and inexpensively integrated by centrifugal molding using a reaction stock solution containing a norbornene-based monomer. In addition, since the water collecting mass body can be freely formed, by forming a horizontal hole rib integrally with the body, a perforated pipe or a non-perforated pipe can be connected to the body very easily. Installation of equipment is easy. Furthermore, since the body for the water collecting mass is a synthetic resin formed by centrifugal molding using a reaction stock solution containing a norbornene-based monomer, it is lighter than concrete and has excellent corrosion resistance,
It has sufficient strength as a body for collecting water.

[Brief description of the drawings]

FIG. 1 is a perspective view of a centrifugally formed body with a lateral hole rib according to one embodiment of the present invention.

FIG. 2 is a perspective view of a mold for molding a centrifugally molded body with a lateral hole rib.

FIG. 3 is a front view of the mold along the line III-III shown in FIG. 2;

FIG. 4 is a perspective view showing a state in which a rolling ring is attached to the mold shown in FIG. 2;

FIG. 5 is a side view of a mold.

FIG. 6 is a longitudinal sectional view of a mold.

FIG. 7 is a side view of a driving device for rotating a mold.

FIG. 8 is a plan view of the driving device.

FIGS. 9A to 9E are cross-sectional views illustrating a method of constructing a water collecting mass.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Die 3 ... Splitting surface 4 ... Splitting die 6 ... End plate 7 ... Convex part 8 ... Rolling ring 12, 14 ... Drive roll 30 ... Molded body with side hole rib 31 ... Side hole 32 ... Cylindrical rib 32a ... Lid 34 ... Manhole

Claims (3)

[Claims] 1. A centrifugally molded product with lateral ribs obtained by reacting and polymerizing a reaction stock solution in a state where centrifugal force is applied to the reaction stock solution in a mold. 2. The centrifugally formed body with side ribs according to claim 1, which is used as a body for collecting water. 3. The centrifugally molded body with lateral ribs according to claim 1, wherein the undiluted reaction solution contains a norbornene-based monomer.