JP2000249114A - Bandlike sheet body and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manufacture a sheet body used in manufacturing a fluid incurrent tube capable of reducing in frictional resistance. SOLUTION: A fluid incurrent tube has a tube main body, and a sheet body 12 fixed to an inner surface of the tube main body. The sheet body 12 has a bandlike base member, and protrusion portions 33 disposed on an inner surface of the bandlike base member. A sheet body manufacturing device for manufacturing the sheet body 12 has a sheet supplying portion for supplying the bandlike base member 34, a grooved cylinder 20 having at an outer peripheral portion thereof a plurality of spiral grooves 20a, and for forming a plurality of protrusion portions 33 onto the bandlike base member 34, and winding portion 24 for winding the bandlike sheet body 12 from the grooved cylinder 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a belt-shaped sheet used for a fluid inflow pipe capable of flowing a fluid such as flammable gas or water and reducing frictional resistance generated on an inner wall. .

[0002]

2. Description of the Related Art To reduce aircraft fuel consumption,
Attempts have been made to reduce the frictional resistance between the fluid and the body surface through which the fluid flows, and it has been reported that the frictional resistance can be reduced by attaching an uneven groove called a riblet to the body surface. Furthermore, examples of applying riblets to the inner wall of a pipe through which fluid flows have been reported, but all are laboratory level research reports, the pipe diameter is small, and various riblet shapes are formed directly on the inner wall of the pipe. .

[0003]

These tubes are formed after forming a riblet shape on a portion of the material corresponding to the inner wall,
The material is processed into a tubular shape, and there are significant restrictions on the material, size, and the like. Also, it takes time and cost to manufacture the tube.

The present invention has been made in view of the above points, and provides an apparatus for manufacturing a belt-like sheet used for manufacturing a fluid inflow pipe capable of reducing frictional resistance generated on an inner wall. The purpose is to:

[0005]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for manufacturing a band-shaped sheet body fixed to an inner surface of a pipe body into which a fluid flows, and a sheet supply section for supplying a band-shaped base material, and a plurality of spirally arranged outer circumferences. The grooved cylinder is formed, a grooved cylinder for forming a band-shaped sheet body by forming a plurality of convex portions extending linearly with respect to the band-shaped base material from the sheet supply unit, and a band-shaped sheet body from the grooved cylinder. An apparatus for manufacturing a band-shaped sheet body, comprising: a sheet winding section for winding.

According to the present invention, a belt-shaped sheet having a plurality of linearly extending convex portions can be easily manufactured.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 are views showing an apparatus for manufacturing a belt-shaped sheet according to the present invention.

First, a fluid inflow pipe 10 into which a fluid flows will be described with reference to FIGS.

As shown in FIGS. 4 to 7, a fluid inflow pipe 10 includes a cylindrical pipe body 11 into which a fluid such as a flammable gas or a fluid flows, and a sheet body 12 fixed to the inner surface of the pipe body 11. , And the sheet body 12 is curved into a shape that matches the inner surface shape of the tube body 11.

Among these, the pipe body 11 may be an iron pipe, a copper pipe, a stainless steel pipe, a vinyl chloride pipe, or the like, but the material is not particularly limited as long as it allows a fluid to flow.

The sheet member 12 includes a base material 34 and a base material 34.
And a plurality of convex portions (riblet shapes) 33 linearly extending along the inflow direction of the fluid provided on the inner surface of the tube body 11. Is provided with an adhesive layer 35 for bonding to the substrate.

The plurality of convex portions 33 have a triangular cross-sectional shape, extend linearly in parallel with each other along the inflow direction of the fluid, and function to reduce the frictional resistance of the fluid. ing.

The sheet body 12 needs to have an appropriate bending suitability (flexibility) according to the pipe diameter of the pipe body 11, but on the other hand, it is easy to handle when it is arranged on the pipe body 11. It is desirable to have a moderate stiffness in consideration of the size. In general, the thickness of the sheet body 12 is preferably 50 μm to 1 mm as a whole, although it depends on the material used.

The material of the sheet body 12 is not chemically deteriorated by the pressure, temperature change, impact or flowing fluid used in the pipe, and is deformed by the riblet shape 33 or peeled off from the pipe body 11. It is necessary to have resistance so that the effect is not significantly reduced.

The material of the base material 34 is polyethylene terephthalate, polycarbonate, polystyrene, polypropylene, polyethylene, polymethyl methacrylate, polyurethane, polyamide, polyimide, polyvinyl chloride, polymethylpentene, polyvinyl acetal, cellulose triacetate, etc. However, the material is not limited to the above, but may be a material such as a metal foil as long as the material has appropriate flexibility, and is not particularly limited.

As a material of the convex portion (riblet shape) 33, for example, an ionizing radiation curable resin can be considered.

It is also possible to provide an adhesive layer between the convex portion 33 and the base material 34 as needed to improve the adhesion. In this case, a resin composition comprising a thermoplastic resin and a reaction-curable resin composition is particularly preferably used as the adhesive layer composition.

Among the above adhesive layer components, those mainly composed of a thermoplastic resin include linear polyester, polyurethane, acrylic resin, polyvinyl butyral, polyamide, vinyl chloride / vinyl acetate copolymer, etc. If desired, a binder to which a plasticizer or a light stabilizer is added can be used.

The binder of the reaction-curable resin composition includes polyester polyol / polyisocyanate, polyether polyol / polyisocyanate, polyacryl polyol-based polyol / polyisocyanate, epoxy / polyisocyanate, and ionizing radiation curable resin. A mold resin can also be used.

As the polyisocyanate, aromatic and / or aliphatic diisocyanates and triisocyanates are widely used.

The ionizing radiation-curable resin composition constituting the convex portion 33 is made of a (meth) acrylate of a polyfunctional compound such as a polyhydric alcohol (hereinafter, acrylate and methacrylate are referred to as (meth) acrylate). ) And a relatively large amount of a reactive diluent. Examples of the diluent include ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene,
Monofunctional monomers such as vinyltoluene and N-vinylpyrrolidone, and polyfunctional monomers such as trimethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate , Pentaerythritol tri (meta)
Acrylate, dipentaerythritol hexa (meth)
There are acrylate, 1,6 hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate and the like.

Further, when the ionizing radiation-curable resin constituting the convex portion 33 is used as an ultraviolet-curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, α
-Amiloxime esters, thioxanthones, n-butylamine, triethylamine, tri-n as photosensitizers
-Butyl phosphine and the like are mixed and used.

The above ionizing radiation-curable resin may contain the following reactive organosilicon compound.

Such a compound is represented by R _m Si (OR ') _n
Wherein R and R 'each have 1 to 1 carbon atoms.
Represents an alkyl group of 0, m + n = 4, and m and n are each an integer. More specifically, tetramethoxysilane, tetraethoxysilane, tetra-iso
-Propoxysilane, tetra-n-propoxysilane,
Tetra-n-butoxysilane, tetra-sec-butoxysilane, tetra-tert-butoxysilane, tetrapentaethoxysilane, tetrapenta-iso-propoxysilane, tetrapenta-n-propoxysilane, tetrapenta-n-butoxysilane, tetrapenta-se
c-butoxysilane, tetrapenta-tert-butoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, dimethylethoxysilane, dimethylmethoxysilane, dimethyl Examples include propoxysilane, dimethylbutoxysilane, methyldimethoxysilane, methyldiethoxysilane, and hexyltrimethoxysilane.

The protruding portion 33 layer can be formed using not only the above-mentioned reaction-curable resin but also a thermoplastic resin. For example, acrylic resins such as methyl methacrylate and ethyl methacrylate, polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polycarbonates, polyhydrocarbons such as polystyrene, polypropylene, and polymethylpentene; 6,6 nylon; It can be selected from thermoplastic resins such as polyamides such as nylon, saponified ethylene / vinyl acetate copolymer, polyimide, polysulfone, polyvinyl chloride, and acetylcellulose.

The sheet 12 has an adhesive layer 35 for joining the sheet 12 to the tube body 11.

The adhesive layer 35 can be selected from materials such as heat activated adhesives, solvent activated adhesives or pressure sensitive adhesives. For example, useful adhesives include polyacrylate adhesives, natural rubber adhesives, and thermoplastic rubber adhesives, which are resistant to fluid flowing through a tube,
It is desirable to have resistance to pressure, temperature change and impact.

The thickness of the adhesive layer 35 is not particularly limited, but is generally in the range of 10 to 100 μm.

When joining the tube body 11 and the sheet body 12, it is possible to join the tube body 11 while peeling off the release sheet by attaching a release sheet to the surface of the adhesive layer 35 in advance. Work becomes easier.

The plurality of sheet members 12 may be connected to each other at a joint A, but it is desirable that the joint A be as small as possible. In addition, it is desirable to join the rib body 33a at the joint between the tube body 11 and the tube body 11 so that the cross sections of the riblet shapes 33a are aligned.

The sheet members 12 may be connected to each other at a joint A, but it is desirable that the joint A be as small as possible. In addition, it is desirable to join the rib body 33a at the joint between the tube body 11 and the tube body 11 so that the cross sections of the riblet shapes 33a are aligned.

If the base material 34 of the sheet 12 has an adhesive property, the adhesive layer 35 is not necessarily provided.

Next, FIG. 7 shows a typical shape of the riblet shape 33 of the sheet member 12. FIG. 7 shows the sheet body 12 from which the adhesive layer 35 has been removed for convenience. As shown in FIG. 7, the riblet shape 33 has a triangular cross section (FIG. 7 (a)), a semicircular cross section (kamaboko body) (FIG. 7 (b)), or a cross section facing inward. Triangular with two curved sides 36 (inverted kamaboko body)
(FIG. 7C) is conceivable. For example, if the cross section is triangular, assuming that the height is h and the twill line interval is s, h =
0.1-1000 μm, preferably 1-1000 μm,
Most preferably 1 to 500 μm, s = 0.1 to 1000
μm, preferably 1-1000 μm, most preferably 1 μm
５００500 μm. In addition, a plurality of riblet shapes 33 having a sine curve shape in cross section, a sine curve shape in the upper half (peak), a V shape in the lower half (valley), a trapezoidal shape, and a columnar shape. They may be arranged adjacently so as to be substantially parallel to the dimensional direction.

Next, the sheet member 12 will be described with reference to FIGS. The sheet body 12 is formed in a belt shape as shown in FIG.
In the longitudinal direction.

As shown in FIG. 2 and FIG. 3, the sheet manufacturing apparatus includes a sheet supply unit 23 for supplying a band-shaped base material 34.
And a grooved cylinder 20 for forming a plurality of convex portions 33 extending linearly with respect to the band-shaped base material 34 to produce the band-shaped sheet body 12, and a sheet winding section 24 for winding the band-shaped sheet body 12
And

The grooved cylinder 20 has a groove 20a having an inverted shape with respect to the convex portion 33. The groove 20a is formed on the outer periphery of the grooved cylinder 20 so as to be substantially perpendicular to the axis of the grooved cylinder 20. Is formed. Further, the groove 20a is formed densely on the outer periphery of the grooved cylinder 20, so that the direction of the groove 20a is substantially perpendicular to the axis of the grooved cylinder 20.

The sheet supply unit 23 and the sheet winding unit 24
Is arranged such that a base material 34 extending from the sheet supply unit 23 to the grooved cylinder 20 is orthogonal to the grooved cylinder 20. For this reason, the direction of the convex portion 33 of the sheet body 12 substantially coincides with the base material 34 and the sheet body 12 as described above.

2 and 3, the sheet supply unit 2
The base material 34 supplied from 3 is guided to the grooved cylinder 20 by the rollers 28. During this time, the ionizing radiation-curable resin liquid is filled in the groove 20a of the grooved cylinder 20 with the filling device 26.
And the ionizing radiation-curable resin liquid in the groove 20a is applied onto the base material 34. Next, the radiation-curable resin liquid on the base material 34 is cured by the ultraviolet rays from the ultraviolet irradiation device 25, and the convex portions 33 are formed on the base material 34, whereby the sheet body 12 is manufactured. Thereafter, the sheet body 12 is guided to a sheet winding body 24 via a roller 29 and wound.

Incidentally, in FIG.
8, 29, the filling device 26 and the ultraviolet irradiation device 25 have been removed.

Next, the sheet body 12 is fixed to the inner surface of the tube main body 11, and thus the convex portion 33 is formed on the inner surface of the tube main body 11.
Can be easily formed.

Next, a modification of the present invention will be described with reference to FIGS. 4 to 6, the pipe body 11
Although an example using a cylindrical body as an example is shown, the invention is not limited to this, and a rectangular cylindrical body may be used as the tube main body 11 (FIG. 8).

Although the sheet body 12 having the base material 34 and the protruding portions 33 is shown, the sheet body 12 is separated from the base material 44 having the protruding portions (riblet shape) 43a provided on the inner surface. And an adhesive layer 45 on the outer surface side of the base material 44.
May be provided (FIG. 9).

As a method for manufacturing the sheet member 12 as shown in FIG. 9, for example, a known hot pressing method (Japanese Patent Laid-Open No.
7310) can be used.
In this case, the material of the base material 44 of the sheet body 12 is a polyolefin (for example, polyethylene, polypropylene,
Ethylene / vinyl acetate polymer, ethylene / ethyl acrylate polymer), vinyl polymer (for example, polyvinyl chloride,
Sheets such as vinyl chloride / vinyl acetate polymer, vinyl chloride / vinyl alcohol polymer, polyvinylidene chloride), polyurethane (eg, polyester and polyether urethane), cellulosic (eg, cellulose acetate) and polyamide (eg, nylon) are preferred. It is not particularly limited to this.

[0044]

As described above, according to the present invention, a belt-shaped sheet having a plurality of convex portions can be easily and easily manufactured.

[Brief description of the drawings]

FIG. 1 is a view showing a belt-shaped sheet body according to the present invention.

FIG. 2 is a perspective view showing an apparatus for manufacturing a belt-shaped sheet body according to the present invention.

FIG. 3 is a side view showing an apparatus for manufacturing a belt-like sheet body according to the present invention.

FIG. 4 is a perspective view showing a fluid inflow pipe.

FIG. 5 is an enlarged sectional view of a fluid inflow pipe.

FIG. 6 is an enlarged sectional view of a sheet body.

FIG. 7 is a view showing a typical shape of a convex portion.

FIG. 8 is a diagram showing a tube main body and a sheet body of a rectangular tube portion.

FIG. 9 is a diagram showing a modification of the sheet member.

[Explanation of symbols]

 Reference Signs List 10 Inflow pipe for fluid 11 Pipe main body 12 Sheet body 20 Cylinder with groove 20a Groove 23 Sheet supply section 24 Sheet winding section 33 Convex section 34 Base 35 Adhesive layer

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) B29K 105: 24 B29L 9:00 F term (reference) 3H111 AA01 BA01 BA15 CA51 CB22 DA26 DB02 DB11 4F209 AA03 AA36 AC03 AF01 AG01 AG03 AG04 AG05 AG08 PA03 PB02 PC01 PC05 PG01 PQ01 PW43

Claims (2)

[Claims] An apparatus for manufacturing a band-shaped sheet body fixed to an inner surface of a pipe body into which a fluid flows, comprising: a sheet supply section for supplying a band-shaped base material; and a plurality of spirally formed grooves formed on an outer periphery. A grooved cylinder for forming a band-shaped sheet body by forming a plurality of convex portions extending linearly with respect to the band-shaped base material from the section, and a sheet winding section for winding the band-shaped sheet body from the grooved cylinder. An apparatus for manufacturing a belt-shaped sheet body, comprising: 2. The sheet supply section and the sheet take-up section are arranged such that a base material extending from the sheet supply section to the grooved cylinder is substantially perpendicular to the grooved cylinder. 2. The apparatus for manufacturing a belt-shaped sheet according to claim 1.