JPH03292133A - Multi-manufacturing method of profile pipe for filament winding and mandrel to be used for that method - Google Patents

Abstract

PURPOSE:To manufacture a large number of profile pipes for filament winding at a time, by a method wherein end profile mold pipes are arranged on both ends of same-diameter pipes each and confronting middle profile mold pipes are connected by small-diameter pipe with each other for sticking and fixed detachably to a shaft, in a mandrel. CONSTITUTION:A mandrel 1 is constituted of a shaft 2, a plurality of same-diameter pipes 3 to be stuck detachably to the shaft 2 and a plurality of end and middle profile pipes 4 and the confronting middle profile pipes 4, 4 are connected by a small-diameter pipe 5 with each other for sticking and fixed to a shaft 2. Molding is performed under this state by winding an epoxy resin layer containing a carbon fiber round the outside of the same-diameter pipes 3 each, end and middle parts profile mold pipes 4... and small-diameter pipe 5 and the resin layer is cut off at a part of the small-diameter pipe 5. Then the end odd-shaped mold pipes 4, 4 are demolded by removing them by turning them outside. A demolding plate 7 is inserted into the part of the small-diameter pipe 5 between the confronting middle odd- shaped mold pipes 4, 4 and fixed. Then the middle odd-shaped mold pipes 4, 4 are demolded by removing them by turning them one side. When they are demolded by removing them by turning them other side and demolded the same-diameter pipes 3... by extracting them further, a large number of profile pipes H are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a multi-filament manufacturing method for irregularly shaped tubes for filament winding, and a mandrel used in the method.

(Prior Art) In the conventional manufacturing method of a deformed tube for filament winding, a part or the whole of the deformed tube for filament winding is a deformed part, so it is difficult to manufacture one product with one mandrel. I was doing it.

<Means for Solving the Problems of the Invention> In the conventional method of manufacturing a deformed tube for filament winding, only one product could be manufactured using one mandrel, resulting in poor production efficiency and high costs. There was a problem with the price being high.

Further, due to the curing furnace, only one or two batches could be operated per day, resulting in a problem in that the number of units produced was small.

An object of the present invention is to solve the above-mentioned conventional problems.

That is, a large number of deformed tubes for filament winding can be manufactured at one time. Therefore, the production efficiency can be doubled by shortening the molding time and setup change time and increasing the molding speed. Furthermore, it is an object of the present invention to provide a method for producing a large number of deformed tubes for filament winding, which can improve material efficiency, and a mandrel used in the method.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a method for manufacturing a large number of deformed tubes for filament winding having deformed portions at both ends using a mandrel, wherein the mandrel is , consisting of a shaft, a plurality of tubes with the same diameter that are detachably fixed to the shaft, and tubes with different shapes at the ends and middle portions, and the tubes with different shapes at the ends are arranged at both ends of each of the tubes with the same diameter and face each other. The middle irregular-shaped tube is connected and fixed with a small-diameter tube and removably fixed to the shaft.A resin layer that becomes the irregular-shaped tube for filament winding is formed on the outer surface of this mandrel, and this resin layer is attached to the small-diameter tube. After cutting the parts, remove the atypical tubes at both ends outward from the shaft to remove the mold, and insert a demolding plate into the small diameter tube between the opposing central atypical tubes that are connected and fixed. After that, the middle atypical tube is removed to one side and demolded, and then the other side is demolded, and each tube of the same diameter is pulled out and demolded. We decided to manufacture a deformed tube.

In addition, it is a mandrel used when manufacturing a deformed tube for filament winding that has deformed parts at both ends, and includes a shaft, a plurality of tubes of the same diameter that are detachably fixed to the shaft, and a deformed part at the ends and the middle part. A tube with a different shape at the end is arranged at both ends of each of the same diameter tubes, and the opposing different shape tubes are connected and fixed by a small diameter tube so as to be removably fixed to the shaft. did.

(Function) By using this mandrel, it is possible to manufacture a large number of deformed tubes for filament winding at one time.

Therefore, it is possible to double the production efficiency by shortening the molding time and setup change time and increasing the molding speed.

Furthermore, it is possible to improve material efficiency.

(Example) Hereinafter, a method for producing a large number of deformed tubes for filament winding according to the present invention and a mandrel used in the method will be described based on drawings showing one embodiment.

Fig. 1 is a partially cutaway front view showing a state in which an irregularly shaped tube for filament winding is manufactured using a multi-strand mandrel according to the present invention, and Fig. 2 is a partially broken front view showing the irregularly shaped tube at the end of the mandrel. Figure 3 is a side view, Figure 4 is a partially cutaway front view showing the same diameter pipe of the mandrel, and Figure 5 is a side view.
The figure is a partially broken front view showing the middle atypical tube connected and fixed by a small diameter tube, Figure 6 is a side view thereof, Figure 7 is a front view of the mandrel shaft, and Figure 8 is a side view of the demolding plate. ,
FIG. 9 is a sectional view taken along the line -IX in FIG. 8.

The mandrel 1 used in the manufacturing method according to the present invention is
As shown in FIG. 1, a shaft 2, a plurality of pipes 3 of the same diameter removably fixed to the shaft 2 by mounting screws 6, a plurality of end and middle irregularly shaped pipes 4,・・・
The atypical end tube 4... is composed of each of the same diameter tubes 3...
The middle deformed tubes 4.4, which are disposed at both ends of the shaft 2 and facing each other, are connected and fixed to the shaft 2 by a small diameter tube 5.

As shown in FIG.
1 has a cylindrical shape. A small-diameter cylindrical fixing portion 42 is fixed to the base side portion of the main body portion 41 . A male screw portion 421 is formed on the outer circumferential surface of the fixing portion 42 and is screwed into a female screw hole of a drawer cylinder (not shown). Furthermore, a female threaded hole 422 is provided at an appropriate location of the fixing portion 42, into which the mounting screw 6 is screwed and fixed to the shaft 2.

Furthermore, the inner surface of the distal end of the main body portion 41 is provided with a notch engaging portion 411 that is engaged with a notch retaining portion 311 (described later) at the end of the tube 3 of the same diameter.

As shown in FIG. 4, the same-diameter tube 3 has a large cylinder-shaped main body
A small cylindrical fixing part 32.32 is fixed to the inner surface of both end parts of the fixing part 32.32, and a female screw hole 321 for fixing it to the shaft 2 by screwing the mounting screw 6 into an appropriate position of the fixing part 32.32, respectively. 321 is provided.

Further, the outer surfaces of both ends of the main body portion 31 are provided with notch engaging portions 311, 311 that are engaged with notch retaining portions 411, 411 at the end portions and the tip of the middle irregularly shaped tube 4.4.

In addition, the middle atypical tube 4.4 disposed at opposite ends of these same diameter tubes 3.3 is connected to a small diameter tube 5 as shown in FIG.
A female threaded hole 51 is provided approximately at the center of the small diameter tube 5 in the axial direction, into which a mounting screw 6 is screwed and fixed to the shaft 2.

Furthermore, on the inner surface of the tip of the main body portion 41.41, there are pipes 3, 3 of the same diameter.
A cut-out engagement portion 411.411 is provided which is engaged with the cut-out engagement portion 311.311 at the end of.

As shown in FIG. 7, the shaft 2 has a
A female threaded hole 21.21 is provided into which a male threaded portion at the tip of a drawer cylinder (not shown) is screwed.

What is shown in FIG. 8 is a demolding plate 7 that is used by being fitted into the small diameter tube 5 during demolding, and is composed of two dividing plates 7.
1.72, and a through hole 73 is provided in the center portion of the mated and coupled state.

The two dividing plates 71 and 72 have their joint parts 711° and 721
are formed alternately to have half the thickness of the main body portion, and when these connecting portions 711 and 721 are aligned and connected to each other, they are formed to have the same thickness as the main body portion.

This joint portion 711.721 is made up of two dividing plates 71.7.
When the demolding plates 7 consisting of 2 are fitted into the small diameter pipe 5 and used, they are aligned with each other and connected by the mounting screws 8.

Note that numerals 73... are fixing holes.

When manufacturing the deformed tube H for filament winding, a deformed end tube 4 is attached to both ends of each of the plurality of tubes 3 having the same diameter.
. . , and the opposing central irregular-shaped tubes 4.4 are connected and fixed by a small diameter tube 5 shown in FIG.

Then, each of the same-diameter tubes 3 .

In this state, as shown in FIG. 1, a resin layer of carbon fiber-containing epoxy resin that will become the irregular shaped tube H for filament winding is applied to each of the same diameter tubes 3... and the end and middle irregular shaped tubes 4...
The resin layer is wrapped around the outer surface of the small-diameter tube 5 to form a bottom shape, and the resin layer is cut at the small-diameter tube 5 portion.

Next, the mounting screws 6... are removed, and the deformed end tubes 4.4 at both ends are removed outward by driving the drawer cylinder to be demolded.

Then, a demolding plate 7 is inserted and fixed in the portion of the small diameter tube 5 between the opposed central deformed tubes 4 and 4 that are connected and fixed.

Thereafter, by pulling out the shaft 2 with a drawing cylinder, these middle deformed tubes 4.4 are removed toward one side and demolded, and further toward the other side to be demolded.

At the same time, each tube 3 with the same diameter is pulled out to complete demolding.

After this demolding is completed, what is manufactured becomes a deformed tube H for filament winding.

Note that the mandrel used in this manufacturing method can be used regardless of the type of resin or type of fiber.

In addition, various sizes can be considered for the mandrel 1,
There is no limit to the size of the product.

Incidentally, in the above embodiment, the case where two irregularly shaped tubes H for filament winding are used is explained, but it is also possible to use two or more tubes.

As mentioned above, by using this mandrel I, a large number of deformed tubes H for filament winding can be made at the same time.
It is possible to manufacture

Therefore, the molding time and setup change time can be shortened, the molding speed can be improved, and production efficiency can be doubled.

Furthermore, we were able to improve material efficiency by 25 to 30% compared to the conventional production of one piece at a time.

Note that the present invention is applicable not only to those in which the end portions and the middle irregularly shaped tube 4 are perfectly circular, but also to those in which they are polygonal and deformed circles.

(Effects of the Invention) As explained above, according to the present invention, a large number of deformed tubes for filament winding can be manufactured at one time. Therefore, production efficiency can be doubled by shortening molding time and setup change time and improving molding speed.

Furthermore, there are effects such as being able to improve material efficiency.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing a state in which a modified tube for filament winding is manufactured using a multi-strand mandrel according to the present invention, and FIG. 2 is a partially cutaway front view showing a modified tube of the mandrel. Fig. 3 is a side view thereof, Fig. 4 is a partially cutaway front view showing the same diameter tube of the mandrel, Fig. 5 is a partially cutaway front view showing an irregularly shaped tube connected and fixed by a small diameter tube, and Fig. 6 7 is a front view of the shaft of the mandrel, FIG. 8 is a side view of the demolding plate, and FIG. 9 is a sectional view taken along line IX--IX in FIG. 8. H...Deformed tube for filament winding 1...Mandrel 2...Shaft 3...Same diameter tube 4...End and middle section deformed tube 5...Small diameter tube 7...Demolding plate

Claims (1)

[Scope of Claims] 1) A method for manufacturing a large number of irregularly shaped tubes for filament winding having irregularly shaped parts at both ends using a mandrel, the mandrel comprising a shaft and a plurality of filament winding tubes removably fixed to the shaft. Consisting of a main tube with the same diameter and a different-shaped end tube and a different-shaped middle section, the different-shaped end tubes are arranged at both ends of each of the same-diameter tubes, and the opposing middle different-shaped tubes are connected and fixed with a small-diameter tube to the shaft. A resin layer is formed on the outer surface of this mandrel to form a modified tube for filament winding, and after cutting this resin layer at the small diameter tube section, the modified tubes at both ends are separated. Remove the mold outward from the shaft, insert a demolding plate into the small-diameter tube part between the opposing central irregularly shaped tubes that are connected and fixed, and fix it, and then turn the middle irregularly shaped tube to one side. Filament winding, characterized in that a large number of deformed tubes for filament winding are manufactured by removing and demolding, further demolding toward the other side, and pulling out and demolding each tube of the same diameter. A method for producing multiple tubes of irregularly shaped pipes. 2) A mandrel used when manufacturing a deformed tube for filament winding that has deformed parts at both ends, including a shaft, multiple tubes of the same diameter detachably fixed to this shaft, and deformed ends and middle parts. a tube, with atypical end tubes arranged at both ends of each of the same diameter tubes, and opposing middle atypical tubes connected and fixed by a small diameter tube to be removably fixed to the shaft. A mandrel for winding multiple irregularly shaped tubes for filament winding.