JPS6113976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a core mold for manufacturing a reducing socket made of reinforced resin, etc., which is a set of core molds and is capable of molding a plurality of reducing sockets. This invention relates to a core mold for socket molding. Conventionally,
When manufacturing pipe fittings made of reinforced resin, etc., a core mold assembled by removably connecting at least two mold members is used in order to facilitate the removal of the core mold from the inside of the molded pipe joint. Sometimes. However, since there is no way to mold pipe fittings of multiple shapes or sizes with a single core mold, separate core molds are prepared for molding pipe joints of each shape or size. The disadvantage was that it required a huge amount of money.

The present invention was made with the aim of solving the above-mentioned conventional drawbacks, and its gist is a core mold for forming a reciprocating socket by supplying a molding material around the core, which has three cores. It has a core mold for forming a connection part with different diameters as described above and a core mold for forming a central part divided into two or more truncated conical annular members, of which two core molds for forming a connection part and A core mold for forming a reciprocating socket is provided, in which a part or all of the annular member of the core mold for forming a center portion can be selected and assembled together.

Hereinafter, the present invention will be explained with reference to embodiments of the drawings.
FIG. 1 is a longitudinal sectional front view showing an assembled state of an embodiment of the present invention, FIG. 2 is a longitudinal sectional front view showing an assembled state of the embodiment of FIG. 1 of the present invention, and FIG. It is a perspective view of an example of an annular member.

11 and 11' are core molds for forming connection parts such as reciprocating socket sockets, and large diameter parts 111 and 111'
and a large diameter cylindrical body having one end thereof, an inclined part 112, 112' whose diameter gradually becomes smaller from the one end, and a convex part 114, 114' and a recessed part 113, 113' on the side surface of the end. Locking pieces 115, 11 each having a female threaded portion on the inner peripheral surface of the portions 111, 111'
5, 115', 115' are provided, and the inclined part 11
Projecting pieces 116, 116, 116', 116' each having a through hole are provided on the inner circumferential surface of 2, 112'. Large diameter part 11 of core mold 11 for forming connection part
1 has a small diameter so that its outer diameter is three steps lower than the large diameter portion 111' of the core mold 11' for forming the connection portion. In the assembled state shown in FIG. 1, a core mold for forming a connection portion with a large-diameter portion 111″ with a one-step recess (not shown in the drawing) and a core mold 11 with a large-diameter portion with a two-step recess 111″ are shown. '' (see FIG. 4), two of the above-mentioned core molds 11 and 11' for forming the connecting portion are used.

Reference numerals 12 and 12' denote side plates that are connected to the end surfaces of the large diameter portions 111 and 111' of the core molds 11 and 11' for forming the connecting portions, and have through holes 121 and 1 for shaft insertion in the center.
21' is provided, and the locking pieces 115, 115, 11
A through hole for insertion of a connecting bolt is provided at a portion corresponding to the female threaded portion of 5', 115'.

Reference numeral 13 denotes a core mold for molding the central portion, which is composed of three truncated cone-shaped annular members 13a, 13b, and 13c, and the annular members are provided with uneven portions on both end sides of each of the annular members 13a, 13b, and 13c. 13
The concave and convex portions are fitted in the order of a, 13b, and 13c,
As a result, a large truncated cone-shaped cylindrical body is formed. Annular members 13a, 13b,
Projecting pieces 13a1, 13b1, 13c1 have a through hole on the small diameter side on the inner peripheral surface of 13c, and locking pieces 13a2, 13b have a female thread on the large diameter side.
2, 13c2 are provided, and the protruding pieces 13a1, 13
b1, 13c1 and locking pieces 13a2, 13b2, 1
3c2 are provided in a staggered manner, and the locking piece 13a2, the protruding piece 13b1, and the locking piece 13b
2 and the protruding piece 13c1 are the bolts 141, 14.
2, the annular members 13a, 13b, 1
3c can be connected to each other.

Reference numeral 15 denotes an annular body, which is provided with projections and depressions on both ends thereof, and is adapted to fit into the projections and depressions on the side surface of the large-diameter side of the annular member 13c and the projections and depressions of the connecting portion forming core mold 11'. .

The annular members 13a, 13b, and 13c are connected to each other with bolts 14 and 14', and the annular body 15 is interposed between the annular member 13c and the connecting portion forming core mold 11', and the locking piece 13c2 and the protruding piece 116 ' with a bolt 143, the side plate 12' is brought into contact with the side surface of the large diameter part 111' of the connecting part forming core mold 11', and the side plate 12' is connected with the locking piece 115' with a bolt 144. A core mold 1 for forming a connection part is attached to the uneven part on the side surface of the annular member 13a.
1, the side plate 12 is brought into contact with the side surface of the large diameter part 111 of the connecting part forming core mold 11, and the side plate 12 is connected to the locking piece 115 with bolts 145.
2, 12' through the through holes 121, 121', and insert the shaft 16, which has male threads at both ends, into the collars 17, 1.
7', bolts 20, 20' are tightened through washers 18, 18' to assemble a core mold for forming a three-stage reciprocating socket. FIG. 4 is a longitudinal sectional front view showing another assembled state of the embodiment of the present invention.

11″ is the large diameter part 11 of the core mold 11′ for forming the connection part.
This is a core mold for forming a connecting portion, which has a large diameter portion 111'' whose outer diameter is two steps lower than 1'.

In the assembled state shown in FIG.
Two core molds 11 for forming the connection portion each having the same diameter portion 11 of 1″ and 3 steps are used.

The annular member 13 serves as the core mold 13' for forming the intermediate part.
Only a is used.

12″ is the large diameter part 11 of the core mold 11″ for forming the connection part
It is a side plate that is abutted and connected to the end face of the shaft 1'', and has a shaft insertion hole 121'' in the center thereof.

Reference numeral 15' denotes an annular body, which is provided with concave and convex portions at both ends thereof, and is adapted to fit into the concave and convex portions on the side surface of the large diameter portion of the annular member 13a and the concave and convex portions of the core mold 11 for forming the connecting portion. There is.

An annular body 15' is interposed between the annular member 13a and the core mold 11'' for forming the connection portion, and they are connected by bolts 146, and a side plate 12'' is attached to the side surface of the large diameter portion 111'' of the core mold 11'' for forming the connection portion. are brought into contact with each other and connected with bolts 147, and the uneven part of the connecting part forming core mold 11 is fitted into the uneven part of the side surface of the small diameter part side of the annular member 13a, and the large diameter part 111 of the connecting part forming core mold 11 is connected. Side plate 1 on the side of
2 and connect with bolts 148, side plate 1
Insert the shaft 16 into the 2,12" through holes 121, 121" and tighten the bolts 20, 20' through the long collars 21, 21' and washers 18, 18' to form a core mold for forming a reciprocating socket. is assembled.

To manufacture a pipe joint using the core mold of the present invention, a mat made of glass fiber or the like is impregnated with an appropriate hardening agent mixed with a resin liquid such as unsaturated polyester, and then wrapped around each assembled pipe joint. On top of that, a long reinforcing material such as glass roving is impregnated with a liquid resin such as unsaturated polyester mixed with a dropwise curing agent, and then wound to form a molding material layer, and then cured. Thereafter, the members constituting the core mold are successively removed.

As mentioned above, the core mold for molding a socket with a different diameter according to the present invention is divided into three or more core molds for molding a connecting part with different diameters and two or more truncated conical annular members for molding a central part. Of these, two core molds for forming the connection part and a part or all of the annular member of the core mold for forming the central part can be selected and assembled into one piece. By appropriately assembling the core molds, it is possible to form a plurality of types of sockets with different diameters.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an assembled state of the embodiment of the present invention, FIG. 2 is a longitudinal sectional front view illustrating a state in the middle of assembly of the embodiment of FIG. 1 of the present invention, and FIG. FIG. 4 is a perspective view showing an annular member of the present invention, and FIG. 4 is a longitudinal sectional front view showing another assembled state of the embodiment of the present invention. Explanation of symbols, 11, 11', 11''... Core mold for forming the connection part, 13, 13'... Core mold for forming the central part,
13a, 13b, 13c... annular member.

Claims (1)

[Claims] 1. A core mold for forming a socket with different diameters by supplying a molding material around it, which is divided into three or more core molds for forming connection parts with different diameters and two or more truncated cone-shaped annular members. and a core mold for molding a central part, of which two core molds for molding a connecting part and a part or all of the annular member of the core mold for central part molding can be selected and assembled together. Core mold for molding different diameter sockets.