JPS5939294B2 - Core mold for bent pipe forming - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a core mold for molding bent pipes made of reinforced resin, etc., which is capable of molding bent pipes with a plurality of bending angles using two core molds. It is related to the core type.

Conventionally, when molding bent tubes with multiple bending angles such as reinforced resin, multiple core molds for bent tube molding, each with a different predetermined bending angle, were prepared and each core mold was used as a dedicated mold. There is no problem when molding a large quantity of standard products with a predetermined bending angle, but when molding small quantities of products with a special bending angle, a dedicated core mold must be prepared for each, which increases costs. Not only that, but the delivery time was also long.

The present invention has been made for the purpose of solving the conventional drawbacks as described above, and the gist thereof is as follows: 5. A core body is formed by connecting a plurality of cylindrical members to each other, and the core body is formed by connecting a plurality of cylindrical members to each other. The core mold for forming a bent tube has at least a series of connecting parts that can be fixed at any angle between the cylindrical members on both sides of the connecting part.

Hereinafter, the present invention will be explained with reference to embodiments of the drawings. 0 1st
The figure is a sectional view showing a core mold for forming a bent pipe according to an embodiment of the present invention.
FIGS. 2 and 3 are sectional views each showing another aspect of the embodiment of FIG. 1.

11 and 11' are cylindrical members for forming the connection part of a bent pipe;
Large diameter portions 111, 111' and sloped portions 112, 112' whose outer diameters gradually become smaller from one end thereof are provided, and uneven portions 113, 113 are formed on the side surfaces of the end portions of the sloped portions 112, 112'.
' are provided, locking pieces 114, 114' with blind holes are provided on the inner peripheral surfaces of the inclined parts 112, 112', and female threaded parts are provided on the outside of the other ends of the large diameter parts j0111, 111'. Flanges 115, 115' are provided.

Reference numerals 12 and 12' designate cylindrical members for forming the central part, and quarry stop pieces 122 and 12 are provided with uneven parts 121 and 121' on the end surface of one end and a female threaded part on the inner peripheral surface of the end.
2' is provided, and locking pieces 123, 123' each having a blind hole are provided on the inner circumferential surface of the other end.

A cylindrical member 11 for forming the connection portion and a cylindrical member 12 for forming the central portion
113,1
21 are brought into contact with each other, and the respective locking pieces 114 and 122
They are tightened and connected with bolts, and this connecting body and the connecting portion forming cylindrical member 11 connected in the same manner as described above.
' and the connecting body of the central part molding cylindrical member 12' are connected to the locking pieces 12 of the respective central part 5 molding cylindrical members 12, 12'.
A rod-shaped body 2 with a male thread screwed on the outer peripheral surface between 3 and 122'
1 and nuts 22, 22, 22, 22.
are fitted and connected to form a core body 1.

And cylindrical members 12, 12' for forming the central part of the core mold body 1.
The connecting part between them is simply the rod-shaped body 21 of the connecting tool 2 and the nut 2.
2, 23, as shown in FIG. As shown in the figure, when the tapered washers 1 3, 3, 3, 3 having loosely tapered surfaces are sandwiched and tightened, the tube axes of the central forming cylindrical members 12, 12' are brought into considerable curved contact. Taper washers 32, 3', 3' each have a sharply tapered surface as shown in FIG.
, 3/ are sandwiched and tightened, the tube axes of the center-forming cylindrical members 12, 12' are further bent and fixed. 4 and 4' are supporting members for mounting the core body 1 on the shaft 5.

Since the supporting members 4, 4/ are symmetrical, the supporting members 4, 4/
This will be explained in detail with reference to FIGS. 5 and 6.
The support member 4 has a rectangular through hole provided in the center of a disk 411, and a plurality of through holes 412,
Projecting pieces 413 and 413' provided with 412' are provided to form the support member main body 41. The support member main body 4111
A C-axis holding member 42 is attached. The shaft holding member 42 consists of a short tube 421 and thin tubes 422, 4225 provided on the outside thereof, and the protruding pieces 413, 41 of the supporting member 41
37 opposing through holes 412, 412/, the shaft holding member 4
The shaft holding member 42 attaches the pin to the support member main body 41 in such a way that the two thin short tubes 422, 4221 are attached by pins.
It is rotatably attached as a fulcrum. The disc 411 is provided with blind holes at positions corresponding to the female threads provided in the collar 115 of the core body 1. As shown in FIG. 1, FIG. 2, or FIG. 3, a bent core body 1
The shaft 5 is inserted through the shaft 5, and the shaft holding parts 42, 42' of the supporting members 4, 4' are inserted into both ends of the shaft 5, and the collar 11 of the core body 1 is inserted.
Disk 411 of support member 4, 4' on the side of 5, 115',
411' is abutted, a bolt is inserted into the quaternary hole provided in the discs 411, 411/IIC, and the bolt is tightened into the female thread provided in the collar 115, 115' of the core mold body 1, Short pipes 421, 421/ of support members 42, 422
The side surface of the mold is tightened to the shaft 5 by a nut, and the core mold body is attached to the shaft via the support member, thereby forming a core mold for forming a bent pipe as shown in FIG. 1, FIG. 2, or FIG. 3. Ru.

If there is a gap between the central molding cylindrical members 12 and 12' of the core body 1 as shown in FIG. 2 or 3, a diamond-shaped plate-shaped coating as shown in FIG. The material 6 is covered. In forming a bent pipe using the core mold for forming a bent pipe of the present invention, a mat made of glass fiber, etc., and an unsaturated polyester etc. An appropriate curing agent is mixed and impregnated in a resin liquid such as a resin, and then wrapped around the impregnated resin, and on top of that, a curing agent is mixed appropriately in a resin liquid such as unsaturated polyester for a long reinforcing material such as glass roping. This is carried out by winding the impregnated material to form a molding material layer and then curing it, and then sequentially removing the core mold.

When molding a bent pipe having a bending angle different from that of the previously molded bent pipe, the bending angle of the core mold main body 1 is appropriately changed and the core mold is assembled and used.

As mentioned above, the core mold for forming bent pipes of the present invention is formed by connecting a plurality of cylindrical members to each other, and at least the connecting portions of the core mold body can be fixed at any angle. By adjusting the bending angle of the connecting portion of the mold body to an arbitrary angle and assembling the mold body, bent pipes having a plurality of bending angles can be formed with one core mold.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a core mold for forming a bent tube according to an embodiment of the present invention, FIGS. 2 and 3 are sectional views showing other aspects of the embodiment of FIG. 1, and FIG. FIGS. 5 and 6 are perspective views showing an example of a covering material used in an embodiment of the invention, and FIGS. 5 and 6 are perspective views respectively showing a state before and after assembly of a support member used in an embodiment of the invention. Explanation of symbols, 1... Core type main body, 2... Connector, 4,
4/... support member, 11, 11', 12, 12/...
- Cylindrical member, 41, 41'... Supporting member main body, 42,
42'...Shaft holding part.

Claims (1)

[Claims] 1 A curved shape in which a plurality of cylindrical members are connected to each other to form a core body, and at least a series of connecting parts of the core body can fix the cylindrical members on both sides of the connecting part at an arbitrary angle. Core mold for tube forming.