JPH08142206A - Core mold for molding pipe - Google Patents

Abstract

PURPOSE: To provide a compact and inexpensive core mold capable of molding a pipe simply, accurately and safely in a pref. state from an aspect of appearance. CONSTITUTION: A core mold 1 for molding a pipe is equipped with a thin plate body mold 2 developed from a predetermined cylindrical body such as a bent pipe or a taper pipe and capable of being assembled into the original cylindrical body and a pair of fixed molds 3 forming a predetermined attaching angle with respect to a support member 4 in such a state that the support member 4 is passed through the molds 3 and coinciding with both ends of the cylindrical body and a pair of the fixed molds 3 are fixed on the support member 4 in an opposed state through the spacer 5 interposed between both molds and the thin plate body mold 2 is assembled and fixed between the fixed molds 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube molding core die for molding various tube bodies made of fiber reinforced resin or the like.

[0002]

2. Description of the Related Art Generally, when forming a bent pipe made of fiber reinforced resin or the like, a core type is used in which tubular members are connected so as to be fixed at an arbitrary angle.

Conventionally, in this core type, as shown in FIG. 6, tubular members a are connected to each other with a point on the end face as a fulcrum b. Also, when using this fulcrum b
The tubular member a on the upper side is lifted up around, and the tension bar d is provided between the flanges c provided inside the tubular member a.
It was adjusted to a desired angle by fixing. The flange c was provided with a long hole e so that the tension bar d could be fixed at a desired angle. Then, after the adjustment, a covering material f or the like is provided in the opening between the cylindrical members a to close the opening. Further, the socket die g was connected to the end of the tubular member a by a bolt (see, for example, Japanese Patent Publication No. 59-39293).

[0004]

However, in the case of the above-mentioned conventional core die, the core die itself is expensive because it is configured to mechanically connect the tubular members a, which are steel dies, to each other. It is heavy and bulky. Therefore, it is expensive to prepare core dies of various diameters, space is saved for the core dies, and the angle is adjusted by lifting the upper tubular member a during use. It causes inconvenience such as danger.

Further, since the tension bar d for fixing the flanges c can be adjusted to an arbitrary angle through a long hole e formed in the flange c, when the tension bar d is intended to be fixed at an accurate angle. However, the play caused by the long hole e is too large, which makes it difficult to adjust the angle.

Furthermore, since the cylindrical members a are largely opened around the fulcrum b, the area covered by the covering material f is large, and there is a disadvantage in that a core die which is preferable in terms of product appearance cannot be obtained.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a compact and inexpensive core die for pipe molding which can be simply, accurately and safely molded in a preferable state in terms of product appearance. .

[0008]

The pipe molding core die of the present invention for solving the above problems is developed from a predetermined tubular body such as a curved pipe or a tapered pipe, and can be assembled into the original tubular body. And a pair of fixed molds that are inserted into the support member and that form a predetermined mounting angle with respect to the support member and that match both ends of the tubular body. A pair of fixed dies are fixed in a state of being opposed to each other via a spacer between the supporting members, and the thin plate cylinder die is assembled and fixed between the fixed dies.

[0009]

According to the present invention, a pair of fixed molds are fixed in a state of being opposed to each other through a spacer between the support members, and the thin plate cylinder mold is assembled and fixed between the fixed molds to thereby bend a curved pipe or It is a core type that supports various shapes such as tapered tubes.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outline of a core die 1 for pipe molding, and FIG.
Shows a thin-plate barrel mold 2 of the core mold 1 for forming the pipe.

That is, the tube forming core die 1 comprises a thin plate body die 2 and a socket die 3.

As shown in FIG. 2, the thin plate body 2 is made of a stainless steel plate having a substantially fan shape and a thickness of 0.5 mm, and the insert piece 21 and the insert hole 22 are provided at both ends thereof, respectively.
Are provided. Then, the insertion piece 21 is inserted into the insertion hole 22.
By forming a cylindrical shape by inserting the above, a tapered barrel shape is formed. The material for forming the thin plate cylinder mold 2 is not limited to the stainless steel plate, and may be various metal plates such as an iron plate and a copper plate, or various resin plates such as polypropylene and polyethylene. Good. However, if you consider reuse,
A material that is not attacked by the molding material is preferable. Also, the thickness is not particularly limited to 0.5 mm, and the barrel die can be easily formed according to the material of the thin plate barrel die 2 and can be easily developed into a thin plate shape. Those are preferable.

The socket die 3 has a flange portion 32 at one end of a main body 31 formed in a short cylindrical shape, and a flange portion 33 into which the end portion of the assembled thin plate die 2 is inserted at the other end portion. It is projected. Further, an insertion hole 34 is provided in the inside so that the shaft member 4 can be inserted therein.

When using the tube molding core die 1 thus configured, first, the shaft member 4 is inserted into the insertion holes 34 of the pair of socket dies 3 so that the socket dies 3 face each other. At this time, the thin plate body mold 2 is interposed between the two receiving die 3 via the spacer 5.
Adjust the spacing to match the length of. Then, the nut 6 is fixed from the outside of the socket die 3.

Thereafter, the flange portion 3 of the socket die 3 facing each other
Assembling is performed while rolling the thin plate cylinder mold 2 so as to stop at 3. At this time, the tape 7 is wound between the end portion of the thin plate die 2 and the collar portion 33 of the socket die 3 for the purpose of increasing the fixing force and masking. Further, the tape 7 is also wound and masked between the insertion hole 22 and the insertion piece 21 of the thin plate cylinder die 2.

After that, a mat made of glass fiber impregnated with a resin liquid such as an unsaturated polyester resin and an appropriate curing agent is wound around the tube molding core 1. Then, a long reinforcing material such as glass roving impregnated by mixing and impregnating a resin liquid such as an unsaturated polyester resin with an appropriate curing agent is wound thereon to form a molding layer, and then cured. After the curing, the socket die 3 and the thin plate die 2 are sequentially disassembled and removed.

When the thin-plate barrel die 2 has a large diameter, it is feared that the thin-plate barrel die 2 may be bent and deformed when the glass roving is wound, so in such a case, As shown in FIG. 3, it is possible to prevent the deformation by using the spacer 50 in which the supporting portion 51 that supports the inner surface of the thin plate die 2 is provided in a protruding manner.

Further, in the present embodiment, the core die 1 for forming a tapered pipe is described, but the core die 1 for forming a bent pipe may be constructed as shown in FIG. In this case, the receiving die 3 is provided with the insertion hole 34 obliquely so that the insertion hole 34 can be obliquely inserted into the shaft member 4. Further, as shown in FIG. 5, the thin plate body mold 2 is formed so as to have a single thin plate shape in the expanded state, and in the assembled state,
It is used in a state where the tape is wrapped around the seam and masked. However, when the thin plate cylinder molds 2 are complicated and cannot be expanded into one, the thin plate cylinder molds 2 expanded into two or more sheets may be connected through the insertion piece 21 or the insertion hole 22. Good.

[0020]

As described above, according to the present invention, the thin plate-shaped thin plate mold which is developed from a tubular body such as a curved pipe or a tapered pipe and can be assembled into the original tubular body is used. Therefore, simply by assembling the thin plate cylinder mold and setting it between the fixed molds without adjusting the bending angle or closing the opening with a covering material as in the conventional case, a core mold that is preferable in terms of product appearance can be obtained. Easy to get.

Further, since a thin thin plate die is used, the work can be performed safely, and since the thin plate die can be stored in an expanded state, it can be stored compactly without taking a place for storage. .

Further, it can be reused many times, and a wide variety of pipes can be manufactured by combining a plurality of fixed molds with a thin plate cylinder mold.

Further, as compared with a conventional molding core die in which a steel die or the like is mechanically connected and an adjusting mechanism is added, the die has a simple structure and is very inexpensive.

[Brief description of drawings]

FIG. 1 is a side view and a side sectional view showing an outline of an overall configuration of a tube molding core die.

FIG. 2 is a development plan view and an assembly perspective view showing the outline of the overall configuration of a thin plate cylinder die used for a tube forming core die.

FIG. 3 is a partial cross-sectional view showing another attachment state of the thin plate cylinder type.

4A and 4B are a side view and a side sectional view showing another embodiment of a tube molding core die.

5A and 5B are a developed plan view and an assembled perspective view showing another embodiment of the thin plate cylinder mold used for the core mold for tube molding.

FIG. 6 is a partial cutaway view showing a conventional bent tube molding core die.

[Explanation of symbols]

 1 Tube molding core type 2 Thin plate body type 3 Receptacle die (fixed die) 4 Shaft member (supporting member) 5 Spacer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location 7310-4F B29C 67/14 R

Claims (1)

[Claims] 1. A thin-plate-shaped thin-plate barrel mold which is developed from a predetermined tubular body such as a curved tube or a taper tube and can be assembled into the original tubular body, and the support member inserted in the support member. And a pair of fixed molds that are fitted to both ends of the tubular body and that have a predetermined mounting angle with respect to each other. A core mold for pipe forming, characterized in that the thin plate cylinder mold is assembled and fixed between the fixed molds.