KR101170447B1 - Method for forming of water and sewage pipe connection socket - Google Patents

Abstract

PURPOSE: A method for forming a connection socket for water and sewer pipes is provided to maintain water tightness by pressing a packing and supporting water and sewer pipes and safely maintain a joining state of the water and sewer pipes. CONSTITUTION: A method for forming a connection socket for water and sewer is as follows. A packing(20) and a fixing member(40) are formed. The fixing member is joined to a fixing member groove(170) of an inner forming mold(120) and at least one packing is joined to a packing groove(171). Water and sewer pipes are inserted into a pipe insertion groove(173) of a inner forming mold. The outer diameter of the inner forming mold is enlarged and the outer diameter of an outer forming mold(140) is reduced so that a forming space(130) is formed. The forming space is filled with a fused synthetic resin and a connection socket is integrally formed and the packing and the fixing member are integrally formed in the inner diameter of the connection socket. The inner and outer forming molds are cooled and the outer diameter of the inner forming mold is reduced and the outer forming mold is separated. The water and sewer pipes and the connection socket being integrally formed are separated from a mold.

Description

Method for forming of water and sewage pipe connection socket

The present invention relates to a method for forming a connecting socket for water and sewage pipes, and more particularly, after forming the connecting socket for connecting the water and sewage pipes for transporting the fluid and the water and sewage pipes, the fixing member and the packing are integrally formed on one side of the water and sewage pipes. It relates to a method for forming a connecting socket for water and sewage pipes to be able to couple the water supply and sewage pipe to the connection socket in a one-touch type.

In general, synthetic resin pipes have hollows formed therein to form double walls or triple walls, sewage pipes formed by extrusion, and water pipes formed by extrusion, and are used in various ways, such as sewage pipes and rainwater pipes.

Here, the synthetic resin tube is continuously formed, cut to a certain length due to movement and storage problems and the cut synthetic resin tube is used by connecting through a variety of connection methods.

Therefore, a synthetic resin pipe is buried underground, and at the same time, a connection structure such as a flange type, an E / F sheet, a heat shrink sheet, a KP type, a knitting pipe, a socket method, and the like has been proposed in various structures.

However, the connection method of the synthetic resin pipe using the flange type and KP type and knitting pipe takes a long time to tighten because of the use of a plurality of bolts and nuts, there was a problem that can not be fastened with a uniform force on the entire surface when tightening.

In addition, the coupling part of the connector is easily broken, and the post-processing part of the connector is weakened, which causes water leakage, and when the rubber ring is thick, it is difficult to insert the pipe, and when the rubber ring is thin, the binding force is weak, causing leakage. There was this.

In addition, the heat shrink sheet is a heat source supplied from the outside by winding the connection part of the synthetic resin pipe in one piece and connected to the synthetic resin tube in one piece.

In addition, the E / F sheet is a method of melting the sheet and the synthetic resin tube and then connecting them integrally. However, the connection performance is good, but in the case of fog or rain in the morning or when water is on the outside of the synthetic resin tube, It is impossible, and in order to finish the work after work, there was a problem that only the welding machine had to be owned with a lot of time.

In particular, the socket method is to insert the synthetic resin pipe to both sides or one side and to be connected while melting by the power supplied from the outside, if the diameter of the socket and the synthetic pipe does not match and a lot of tolerance occurs, the connection is partially There was a problem that the stability is reduced because the portion is not made.

The conventional connection socket is configured to connect the pipes inserted through the openings on both sides with the protrusion protruding along the center of the inner circumferential surface being interposed therebetween. The pipe has a state in which a rubber ring, which is water- In the connection socket.

However, in the conventional connecting socket for inserting pipes in which watertight and shock absorbing rubber rings are inserted into both openings, the watertight function of the rubber ring is lost as the water pressure flowing into the pipe increases. There was a problem that the pipe is easily separated from the connection socket.

That is, when the rubber ring is fixed to the outside of the pipe and then coupled to the connection socket, the rubber ring is twisted by friction with the inner circumferential surface of the opening of the connection socket, causing a partial gap. As a part of the ring is broken, the water pressure flowing into the pipe extends to the microcavity between the sliding bump and the rubber ring, and thus the watertight function of the rubber ring is lost, so that the pipe is opened at both sides of the connection socket. There was a problem of being pushed to the side.

In addition, the present applicant Patent No. 0920808 (2009. 09. 30. registration) is a fixed part fixed in an uneven shape, the support part is formed integrally with the fixing part having a wing shape on both sides, and the fixing part The second pressing portion is formed to protrude from the support portion to the other side, the first pressing portion having a hole formed therein and extending from the first pressing portion, the end portion of which is bent outward.

However, the pipe is inserted in the direction in which one seal is installed, and the watertight is maintained by the sealing while the other side is installed. Therefore, watertightness can be maintained because double watertightness is provided at a position using two seals, but inserting a pipe using a single sealing may cause watertightness due to a lack of maintaining the sealing. Because of the narrow width of the seals, there was a drawback that the inserted pipe was easily separated due to the pressure generated from the outside and the income generated from the inner diameter.

Document 1. Invention Patent No. 0920808 (2009. 09. 30. Registration) Document 2. Invention Patent No. 0488494 (registered April 29, 2005) Document 3. Utility Model Registration No. 3003027 (registered on Jan. 13, 2003) Document 4. Invention Patent No. 0532555 (registered Nov. 24, 2005)

Therefore, the problem of the present invention devised to solve such a conventional drawback, connecting the water and sewage pipe and the water and sewage pipe to each other and molded in one piece (single-collar type) on one side of the water and sewage pipe using a separate connection device for the water and sewage pipe. If you do not want to combine in one-touch type to provide a water tightness.

According to the present invention, the packing and the fixing member are integrally injection-molded in the inner diameter of the pipe connecting socket so that the packing supports the water and sewage pipe inserted into the connecting socket while pressurizing the packing to hold the watertight and to hold the water tightly so that high water pressure is applied. Even if it is to maintain the coupling state so that the water pipes do not push out.

The present invention is firmly fixed by using the pressing force of the packing generated by pushing the pipe into the connecting socket, and then fixed again by fixing the outer diameter of the water supply and sewage pipe by using the fixing member injection molded integrally with the connecting socket on the outside of the packing. To prevent this.

In the present invention, in the connecting socket molding method for molding the connecting socket integrally for the connection of another water and sewage pipe to one side of the water and sewage pipe 17,

A packing molding step of molding the packing and forming a plurality of holes at regular intervals so that the holes are connected through the resin filling hole;

A fixing member forming step of forming an outer fixing part and an inner fixing part inclined in one direction from a lower side after forming an incision hole and a side hole formed in the upper side of the body with a metal material and forming a side cutting groove in the side;

Reducing the outer diameter of the inner mold and coupling the fixing member to the fixing member groove, and supplying the packing and the fixing member to the mold for coupling at least one packing to the packing groove;

Coupling the water and sewage pipe to the mold to insert the water and sewage pipe into the pipe insertion groove of the inner molding mold;

A mold setting step of expanding the outer diameter of the inner mold and reducing the outer diameter of the outer mold to set the mold to form a molding space;

A molten synthetic resin supplying step of supplying a molten synthetic resin melted from the synthetic resin to the molding space and filling the molding space with the molten synthetic resin integrally molded with the packing and the fixing member integrally with the inner diameter of the joint socket;

Cooling and separating the molten synthetic resin after the cooling is performed in the internal molding mold and the external molding mold, reducing the outer diameter of the internal molding mold, and opening the external molding mold to separate the mold; And

The water and sewage pipe and the connecting socket is formed integrally molded from the mold to separate the water and sewage pipe and connecting socket to complete the molding in the form of a single collar; characterized in that it is manufactured through.

The present invention connects the water and sewage pipe and the water and sewage pipe to each other by injection molding the connecting socket in one piece (one-sided collar type) on one side of the water and sewage pipe by pushing the water and sewage pipe into one-touch type without using a separate connection device It provides an effect that can provide.

According to the present invention, the packing and the fixing member are integrally injection molded into the inner diameter of the pipe connecting socket so that the packing supports the water and sewage pipe fitted to the connecting socket while pressurizing the packing to maintain watertightness and at the same time firmly. Even if high water pressure is applied, the sewer pipe can be safely buried so that the sewage pipe can not be pushed outwards.

The present invention is fixed by using the pressing force of the packing generated by pushing the pipe into the connection socket, and then again using the fixing part protruded obliquely to the fixing member injection molded integrally with the connection socket on the outside of the packing water and sewage pipe It is possible to provide a stable bonding state while preventing the separation and separation by getting stuck or buried in the outer diameter of.

1 is a cross-sectional view of a molding state of a mold showing a preferred embodiment of the present invention
2 is a cross-sectional view of a mold for installing the packing and the fixing member of the present invention;
3 is a cross-sectional view showing a state in which the connecting socket of the present invention is molded
Figure 4 is a cross-sectional view of the water and sewage pipe coupled to the connection socket of the present invention
5 is an enlarged cross-sectional view of a major part of the invention.
6 is an enlarged cross-sectional view of the socket body of the present invention.
7 is an enlarged cross-sectional view of the main portion of the packing of the present invention;
8 is a plan view of the fixing member of the present invention
9 is a front view of the fixing member of the present invention;
10 is a block diagram showing a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a molding state of a mold showing a preferred embodiment of the present invention, Figure 2 is a cross-sectional view of a mold to be installed the packing and the fixing member of the present invention.

Integral to one end of a water pipe, 17, commonly known as a straight pipe, a square profile, or a double-walled profile, in which a reinforcing rod of a cross shape is formed in a square inner diameter, spirally wound to form a tube. Socket body forming apparatus 100 for molding the connecting socket 11 is installed so that the operating shaft 112 is connected to the cylinder shaft 111 protruding from the hydraulic cylinder 110 reciprocating, the operating shaft 112 It is installed to the outer diameter of the inner molding mold 120 is variable in size, and the outer portion of the inner molding mold 120 is connected to the end of the water and sewage pipe 17 is a space in which the connecting socket 11 is molded In the outer space of the molding space 130 and the inner molding mold 120 and the molding space 130 is provided with an outer molding mold 140 that is divided into several equal parts and assembled into a cylindrical shape by the coupling.

One side of the outer molding mold 140 is provided with a fixed body 150 and the moving body 160.

An outer diameter of the inner molding mold 120 is formed along the shape of the fixing member groove 170 and the one or more packings 20 to which the fixing member 40 is coupled. 172 and the upper and lower sewer pipe 17 to form a pipe insertion groove 173 is located.

An end portion of the water supply and drainage pipe 17 is formed to form a raw material supply hole 17a at an outer diameter so as to be filled with a raw material to be integrally molded.

Figure 3 is a cross-sectional view showing a state in which the connecting socket of the present invention is molded, Figure 4 is a cross-sectional view of the water and sewage pipe coupled to the connecting socket of the present invention, Figure 5 is an enlarged cross-sectional view of the main part of the present invention, Figure 6 is An enlarged cross-sectional view of the socket body of the present invention is shown.

Insertion of the end of the water and sewage pipe 17 consists of a connecting socket 11 for molding the socket body 10 integrally in the molding space (130).

The socket body 10 constituting the connecting socket 11 forms a water and sewage pipe insertion groove 12 into which the new water and sewage pipe is inserted in one-touch forward, and a fixing member is installed to couple the fixing member 40 to the inside thereof. The groove 13 is formed, and the front packing groove 14 and the rear packing groove 15 are formed to continuously couple the at least one packing 20 to the inside, and then the locking jaw 16 is formed inward. The injection molding is integrally formed at the end of the water and sewage pipe 17.

The socket body 10 is the injection molding of the fixing member 40 and the packing 20 in one piece, the connection socket 11 is supplied to the end of the water supply and drainage pipe 17 in one piece (single-collar shape). will be.

7 shows an enlarged cross-sectional view of the main part of the packing of the present invention, and has a fixing protrusion 21 coupled to the front packing groove 14 and the rear packing groove 15 at an outer diameter thereof, and The outer diameter is formed in the form of a straight or serrated small concave-convex shape, and the watertight body 25 is formed in a semicircular shape at the lower side of the fixed protrusion 21 to form a hole 22 and a resin filling hole 24 formed at the center thereof. The molten resin is supplied to deform the shape by pressing to maintain the watertight.

The semi-circular body protrusion 25 'is formed in the direction of the pipe insertion hole 12 in the watertight body 25, and the inner pressure part 26 protrudes obliquely from the lower center of the watertight body 25 to the right side, and then presses inwardly. A plurality of inner watertight protrusions 27 were formed at regular intervals at the inner diameter of the part 26.

Wedge support 23 and an inner support 28 are formed on both sides of the watertight body 25 of the packing 20, and an inner pressing portion 26 of the inner support 28 is deformed to meet the support protrusion 29. ) Is formed.

8 is a perspective view of the fixing member of the present invention, Figure 9 shows a front view of the fixing member of the present invention.

The fixing member 40 which is integrally fixed to the fixing member mounting groove 13 of the connecting socket 11 is made of a metal material, and is formed in a round shape as a whole, so that the cross-sectional shape of the body 41 has a cross section. An external long hole 42 is formed in the side, and a side hole 43 is formed in the side surface, and the external fixing portion 45 and the internal fixing portion 46 protrude inclined in one direction from both sides so that the end is serrated. It protrudes in the form of unevenness.

The outer fixing part 45 and the inner fixing part 46 are divided at regular intervals by the incision dividing groove 44.

The present invention made of such a configuration to reduce the outer diameter of the inner molding mold 120 is formed in a circular shape is divided into several pieces by driving the hydraulic shaft 11, the cylinder shaft 11 is advanced to the working shaft 112 After the fixing member groove 170, the outer fixing portion 45 and the inner fixing portion 46 of the fixing member 40 are coupled to be fixed at regular intervals.

The fixing member 40 may vary in number depending on the diameter of the internal molding mold 120, it is preferable to supply in the range of about 6 to 12.

One or more packing grooves 171 formed in the outer diameter of the inner molding die 120 are independently coupled to the injection molding packing 20 of a rubber material.

After the fixing member 40 and the packing 20 are combined, the water supply and drainage pipe 17 is supplied to be coupled to the pipe insertion groove 173 at the outer diameter of the inner molding mold 120.

When the fixing member 40, the packing 20, and the water and sewage pipe 17 are inserted, the hydraulic cylinder 110 is driven to reverse the cylinder shaft 111 so that the working shaft 112 has several pieces of the inner forming groove 120. It is divided into and combined to maintain a circular shape.

Then, the water supply and drainage pipe 17 and the packing 20 and the fixing member 40 at the outer diameter of the inner molding mold 120 is provided in a precisely set position.

The outer molding mold 140 is located at the outer diameter of the molding space 30 having the shape in which the connecting socket 11 is to be molded, and the synthetic resin made of the same material as the water and sewage pipe 17 is melted in a portion not shown. It is supplied to and filled in the molding space (130).

When the molten synthetic resin is filled in the molding space 130, the connecting socket 11 is molded, and the packing 20 and the fixing member 40 are integrally molded in the inner diameter.

The packing 20 is a molten synthetic resin filled in the molding space 130 is molded integrally with the shape of the outer diameter and penetrates into the resin filling hole 24 so that a part of the packing 20 penetrates into the inside of the hole 22. It is molded so as to be integral with the uneven shape formed in the outer diameter of the).

The fixing member 40 is supplied to the fixing member groove 170 while the molten synthetic resin is supplied to the external long hole 42 formed on the outside of the body 41, the side hole 43 formed on the side, and the incision dividing groove 44. Except) to provide a state in which the molten synthetic resin is integrally coupled in the entire internal space of the fixing member 40.

After supplying the molten synthetic resin, the connection socket 11 is cooled through the cooling process, and then the external mold 140 is opened again, and the hydraulic shaft 110 is driven to operate the shaft 112 through the cylinder shaft 111. The outer diameter of the inner molding die 120, which is advanced and divided into several pieces, is performed.

When the outer molding mold 140 is opened and the outer diameter of the inner molding mold 120 is reduced, the connecting socket 11 formed integrally with the water and sewage pipe 17 is separated to the outside to complete molding.

The inner molding mold 120 is formed by supplying the packing 20 and the fixing member 40 to the outer diameter to fill the molten synthetic resin supplied to the molding space 130 to be molded integrally to form the connecting socket 11 Compared to using the packing 20 and the fixing member 40 to provide an integral coupling structure to prevent the leakage of water from the assembly portion, it is possible to safely maintain the watertight.

And since the water supply and sewage pipe 17 provides a state in which the connection socket 11 is integrally coupled to each other, the water and sewage pipe 17 and the connection socket 11 are separately formed and then bonded and welded to the molten synthetic resin. Therefore, it is possible to prevent the occurrence of leakage at the connection portion, and to provide a stable and robust coupling form to prevent the separation phenomenon at the connection portion.

After providing the state in which the connecting socket 11 is integrally molded to the water and sewage pipe 17 as described above, when the water and sewage pipe 17 is buried in the ground, into the water and sewage pipe insertion groove 12 of the connecting socket 11. Pushing the end of the water and sewage pipe 17 in a one-touch push to reach the locking jaw 16 will be able to complete the buried without the need for a separate device or structure to maintain the watertight.

When the water supply and drainage pipe 17 is coupled to the connection socket 11 in a one-touch type, the watertight body 25 formed in the inner diameter of the packing 20 is deformed and provides a state capable of maintaining watertightness.

Since the watertight body 25 of the packing 20 is pushed in through the outer diameter of the water and sewage pipe 17, the inner pressurizing portion 26 meets the support protrusion 29 to maintain watertightness, and the inner pressurizing portion ( 26, the inner watertight protrusion 27, the watertight body 25, and the body protrusion 25 'can maintain the watertightness of the water and sewage pipe 17 in various stages, so that the connection socket 11 and the water and sewage pipe 17 Watertightness can be maintained at the joint.

When the water supply and drainage pipe 17 enters through the water supply and drainage pipe insertion groove 12, the external fixing part 45 and the internal fixing part 46 of the fixing member 40 protrude inclined inwardly at regular intervals. Since the water and sewage pipe 17 is to be deformed more inclined inward, and after the entrance of the water and sewage pipe 17 is finished to hold the outer diameter of the water and sewage pipe 17 to provide a stable coupling state, When the water and sewage pipe 17 or the connection socket 11 is contracted and expanded due to the thermal expansion coefficient, the water and sewage pipe 17 is not only provided to provide a stable coupling state but also the water and sewage pipe 17 is to be separated by the outer diameter. The outer fixing part 45 and the inner fixing part 46 which are formed to be inclined inwardly are fixed to the outer diameter of the upper and lower sewer pipe 17 to prevent separation. In severe cases, the end portion having the serrated shape is connected to the outer diameter of the upper and lower sewer pipe 17. foil It provides a state it is possible to prevent the phenomenon in which water supply and drainage pipe 17 are separated from the connecting socket (11).

Hereinafter will be described in detail through each step with respect to the manufacturing method for integrally molding the connecting socket to the water and sewage pipe through a preferred embodiment of the present invention.

[Example]

end. Packing molding step (S1)

The packing 20 is molded by injection or extrusion through an independent mold, and a plurality of holes 22 are formed at regular intervals so as to be connected through the resin filling hole 24 and molded in a circular shape.

I. Fixing member forming step (S2)

The body 41 is formed in a "∩" shape by cutting and bending a metal coil or a steel plate, and an external long hole 42 is formed on the upper side, and a cutout groove 44 and a side hole 43 are formed on the side. After forming the outer fixing portion 45 and the inner fixing portion 46 to be inclined in one direction from the lower side; The end portion is molded to have a sawtooth shape.

All. Packing and fixing member supply step to the mold (S3)

The outer diameter of the inner molding mold 120 is reduced and the fixing member 40 is coupled to the fixing member groove 170, and at least one packing 40 is coupled to the packing groove 171.

la. Water and sewage pipe joining step to the mold (S4)

The upper and lower water pipes 17 are inserted into the pipe insertion grooves 173 of the inner molding mold 120 to be coupled thereto.

hemp. Mold setting step (S5)

The outer diameter of the inner molding mold 120 is enlarged and the outer diameter of the outer molding mold 140 is reduced to set the mold so that the molding space 130 is formed.

bar. Melt synthetic resin supply step (S6)

The molten synthetic resin melted synthetic resin is supplied to the molding space 130 and filled in the molding space 130 while the resin filling hole 24 of the packing 20 and the external holes 42 and side holes of the fixing member 40 are filled. 43) and the water supply and sewage pipe 17 and the connecting socket 11 are integrally formed by being supplied to the cut-out dividing groove 44 and the packing 20 and the fixing member 40 are integrally formed in the inner diameter of the connecting socket 11. Will be.

four. Mold cooling and separation step (S7)

After the molten synthetic resin is filled, cooling is performed in the inner molding mold 120 and the outer molding mold 140, the outer diameter of the inner molding mold 120 is reduced, and the outer molding mold 140 is opened to be separated. .

Ah. Water and sewage pipe and connecting socket separation step (S8)

The water and sewage pipe 17 and the connecting socket 11 formed in one piece are separated from the mold to complete molding in the form of a single collar.

The present invention combines a variety of water and sewage pipes, such as solid pipe, double wall sewer pipe, double-walled sewer pipe, water pipes to the mold, supply the packing and the fixing member, and then injection molding the connection socket integrally with the supply of molten synthetic resin, a separate connection device It is possible to connect water and sewage pipes to one-touch type by connecting them to the connection socket to maintain watertightness, and after assembly, the watertightness is stably maintained by the packing and the water and sewage pipes are never fixed by the fixing member. It is a very useful invention.

10: socket body 11: connection socket
12: water and sewage pipe insertion groove 13: fixing member installation groove
14: front packing groove 15: rear packing groove
16: hanging jaw 17: water and sewage pipe
20: packing 21: fixed protrusion
22: hole 23: outer support
24: resin filling hole 25: watertight body
25 ': body protrusion 26: inner pressure part
27: inner watertight projection 28: inner support
29: support protrusion 40: fixing member
41: body 42: external key
43: side hole 44: incision split groove
45: external fixing part 46: internal fixing part
100: socket body forming apparatus 110: hydraulic cylinder
111: cylinder shaft 112: operating shaft
120: internal molding mold 130: molding space
140: external molding mold 150: fixed body
160: moving body 170: fixing member groove
171: packing groove 172: connection fixing groove
173: tube insertion groove

Claims (4)

In the connecting socket molding method of forming a connecting socket 11 in one piece for connecting another water and sewage pipe to one side of the water and sewage pipe 17,
A packing molding step (S1) of molding the packing 20 and forming a plurality of holes at regular intervals so that the holes 22 are connected through the resin filling hole 24;
The external material hole 42 is formed on the upper side of the body 41 by the metal material, and the inlet dividing groove 44 and the side hole 43 are formed on the side, and the outer fixing part 45 and the inner height are inclined in one direction from the lower side. Fixing member forming step (S2) to form a government (46);
Reduce the outer diameter of the inner molding mold 120 and couple the fixing member 40 to the fixing member groove 170, and supplying the packing and the fixing member to the mold for coupling the at least one packing 40 to the packing groove 171 Step S3;
Water and sewage pipe coupling step (S4) to the mold for inserting and coupling the water and sewage pipe 17 into the pipe insertion groove (173) of the inner molding mold (120);
A mold setting step (S5) of expanding the outer diameter of the inner molding mold 120 and reducing the outer diameter of the outer molding mold 140 to set the mold to form the molding space 130;
The molten synthetic resin is melted and supplied to the molding space 130 to be filled in the molding space 130, and the connecting socket 11 is integrally molded, and the packing 20 and the fixing member 40 are formed at the inner diameter of the connecting socket 11. The melt synthetic resin supply step (S6) is molded integrally;
After the molten synthetic resin is filled, the cooling is performed in the inner molding mold 120 and the outer molding mold 140, the outer diameter of the inner molding mold 120 is reduced, and the mold is separated by opening the outer molding mold 140. Cooling and separating step (S7); And
Water and sewage pipes connected to the water and sewage pipes formed by integrally forming the water supply and sewage pipe 17 and the connecting socket 11 is separated from the mold to complete the molding of the single collar collar and the connecting socket separating step (S8); Molding method of socket
The method of claim 1,
Fixing member forming step (S2)
The body 41 is formed in a "∩" shape by cutting and bending a metal coil or a steel plate, and an external long hole 42 is formed on the upper side, and a cutout groove 44 and a side hole 43 are formed on the side. After forming the outer fixing portion 45 and the inner fixing portion 46 to be inclined in one direction from the lower side; Forming method of connecting socket for water and sewage pipe, characterized in that the end is formed to have a sawtooth shape.
The method of claim 1,
In the fixing member 40 of the molten synthetic resin supplying step S6, the molten synthetic resin forming the socket body 10 by the external long hole 42, the side hole 43, and the incision dividing groove 44 is formed inside the body 41. Forming method of water and sewage pipe connecting socket, characterized in that the filling is molded in one piece.
The method of claim 1,
The packing 20 of the molten synthetic resin supplying step S6 forms a resin filling hole 24 in a hole 22 formed in the watertight body 25 so that the molten synthetic resin of the socket body 10 is filled in one piece. Forming method of water and sewage pipe connecting socket, characterized in that the molded.

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