KR101311483B1 - Connections of the molding machine - Google Patents

Abstract

PURPOSE: A device to mold connectors for connecting a synthetic resin pipe maintaining the watertightness as an inner rubber ring is integrally connected is provided to maintain the watertightness by the multi-connected structure fixing external diameter of the synthetic resin pipe and to prevent from separating by using the inner rubber ring integrally injection-molded with the connector inside a front rubber ring. CONSTITUTION: A device (100) to mold connectors for connecting a synthetic resin pipe (40) maintaining the watertightness as an inner rubber ring is integrally connected comprises an operational shaft (112), an outdoor mold (140), an indoor mold (120), and an indoor rubber ring (30). A cylinder shaft (111) protruded from a hydraulic cylinder (110) is connected to the operational shaft. The outdoor mold integrally forms the connector for the connection of a connecting synthetic resin pipe on one side of the synthetic resin pipe. The outdoor mold forms a molding space (130) in an external diameter shape of the connector in the internal diameter. The indoor mold forms a front connecting groove in the internal diameter of the molding space. The indoor mold forms a protrusion for preventing from pushing to be connected to the internal diameter of the connecting groove and a fixing protrusion. The indoor rubber ring is equipped with an external diameter connecting protrusion and an internal diameter connecting protrusion by being cut with a cutting groove.

Description

Molding apparatus for joining joints of synthetic resin pipes in which internal rubber rings are integrally bonded to maintain watertightness {Connections of the molding machine}

The present invention relates to a molding apparatus of a connector for joining synthetic resin pipes in which the inner rubber ring is integrally coupled to maintain watertightness, and more particularly, to an inner diameter of the inner diameter of a connector for connecting a synthetic resin pipe and a synthetic resin pipe for transporting fluid. After molding the ring to be integrated, the inner rubber ring which combines the water and sewage pipe with the front rubber ring on one side of the connector to be combined with the one-touch type of single-color collar is integrally combined to maintain the watertightness. A molding apparatus for a connector.

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, as described above, in the conventional connection socket in which the pipe having the water-tight and buffering rubber rings is inserted into the two side openings and connected to each other, the water-tight function by the rubber ring is lost There is a problem that the pipe is easily separated from the connection socket.

That is, when the rubber ring is fixed to the connection socket after the rubber ring is fixed to the outer side of the pipe, the rubber ring is twisted by the friction with the inner circumferential surface of the opening of the connection socket to be partially engaged with each other. The water ring function of the rubber ring is lost as the water pressure flowing into the inside of the pipe reaches the minute space between the jam-preventing jaw and the rubber ring, So that they are separated from each other.

In addition, Invention Patent No. 0920808 (2009. 09. 30. registration) is a fixed part fixed in a concave-convex shape, a support part which is formed integrally with the fixing part having a wing shape on both sides, and the other side of the fixing part It is formed of a first pressing portion formed to protrude from the support portion formed with a hole in the inner side and the second pressing portion formed in a shape extending from the first pressing portion, the end of which is bent outward.

However, a pipe is inserted in a direction in which a single sealing is installed, and the watertightness is maintained by the sealing by the sealing. In the opposite side, sealing is installed at two places, and the pipe is clamped with an outer diameter to fix the pipe. Therefore, watertightness can be maintained by providing double watertightness at positions where two sealing rings are used. However, if a pipe is inserted by using one sealing ring, watertightness may occur due to insufficient sealing of the sealing ring. The width of the sealing is so narrow that the inserted pipe is separated easily due to the pressure generated from the outside and the importing from the inside 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, in order to solve these conventional drawbacks, a solution to the problem of the present invention is to connect a synthetic resin pipe and a synthetic resin pipe to each other by connecting the synthetic resin pipe at one side of the connecting pipe in a one- And the like.

In the present invention, the inner rubber ring is integrally injection-molded on the inner diameter of the connection port, and the rubber ring is supported by the synthetic resin pipe inserted into the connection port while pressing the rubber ring, so that the water ring is maintained and firmly held, And the joint is firmly held so that the synthetic tube is not pushed outward due to the thermal expansion coefficient.

In the present invention, the inner rubber ring is integrally injection-molded inside the front rubber ring after fixing the water-tightness by using the pressing force of the front rubber ring generated by pushing the synthetic tube into the connecting hole so that watertightness can be maintained. So that the outer diameter of the synthetic resin pipe can be fixed to prevent it from escaping.

The present invention provides an integrally formed connector for connecting the combined synthetic resin tube on one side of the synthetic resin tube, and an external molding mold formed in the inner diameter of the molding space having an outer diameter of the connector; An inner rubber ring groove and a synthetic resin are formed so as to form a front connection groove in the inner diameter of the molding space, the anti-rolling protrusion is coupled to the inner diameter of the fixing protrusion and the coupling groove, and the inner rubber ring formed by the outer diameter of the inner diameter coupling protrusion is coupled to the outer diameter. An internal molding mold forming a tube insertion groove to which the tube is coupled; The inner rubber ring is coupled to the inner rubber ring groove and formed with an inner diameter of the fixing protrusion and the coupling groove at regular intervals, and formed by cutting the outer diameter coupling protrusion and the inner diameter coupling protrusion into incision grooves located on the inclined surface. In the molding apparatus of the connector for joining synthetic resin pipes,
The connector is an end of the inclined surface and the joint of the synthetic resin pipe is located inside the inner rubber ring connecting groove that forms a rubber ring coupling jaw that the coupling groove is located to one side of the split jaw from the inside of the front connecting groove to which the front rubber ring is coupled. Forming a pipe coupling groove is characterized in that the front rubber ring and the synthetic resin tube is molded integrally.

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In order to connect a synthetic resin pipe and a synthetic resin pipe to each other, a synthetic resin pipe is injected and molded integrally with a connecting pipe to one side of the connecting pipe, and the synthetic resin pipe joining at the front of the connecting pipe is combined with a one- Thereby providing an effect of stabilizing watertightness.

In the present invention, the inner rubber ring is integrally injection-molded on the inner diameter of the connecting hole, and the inner rubber ring is supported by the synthetic resin pipe inserted into the connecting hole while pressing the inner rubber ring to maintain watertightness, It is possible to firmly maintain the joined state so that the synthetic resin pipe is not pushed outward due to the thermal expansion coefficient.

In the present invention, the inner rubber ring is integrally injection-molded inside the front rubber ring after fixing the water-tightness by using the pressing force of the front rubber ring generated by pushing the synthetic tube into the connecting hole so that watertightness can be maintained. It is an object of the present invention to provide an effect of preventing watertightness maintenance and departure by a multiple coupling structure for fixing an outer diameter of a synthetic resin pipe.

FIG. 1 is a front view of a state in which a synthetic resin pipe is connected to a connector of the present invention
2 is a cross-sectional view showing a separation state of the present invention
Fig. 3 is a cross-sectional view showing a state of engagement according to the present invention
Figure 4 is a cross-sectional view of the major part of the connector of the present invention
5 is a cross-sectional view of the front rubber ring of the present invention
6 is a cross-sectional view of the inner rubber ring of the present invention
7 is a cross-sectional view showing another embodiment of the inner rubber ring of the present invention
8 is a sectional view of the mold of the present invention
9 is a cross-sectional view of the rubber ring of the present invention,
10 is a cross-sectional view of a state in which the connector of the present invention is molded
11 is an enlarged cross-sectional view of a main part showing another embodiment of the present invention
12 is a block diagram illustrating 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.

FIG. 1 is a front view showing a state where a synthetic resin pipe is connected to a connecting pipe of the present invention, FIG. 2 is a sectional view showing the separated state of the present invention, and FIG. 3 is a sectional view showing a combined state of the present invention.

The connection port 10 is formed in the shape of a multiple color and the synthetic resin pipe 40 is fused and connected to one side of the connection port 10 and integrally joined while molding the connection port 10.

The inner rubber ring 30 is formed on the inner diameter of the coupling hole 10 and then is formed into a unitary shape when the coupling ring 10 is formed by being coupled to the metal mold. 14).

Coupling synthetic resin pipe 41 for coupling to the front of the connector 10 is formed in the outer diameter at a predetermined position in the inner diameter of the sawtooth-shaped unevenness is formed and forms a coupling projection ring 42 is separated one part, the coupling The front rubber ring 20 is coupled to the outer diameter of the synthetic resin tube 41 so that the watertightness is maintained by being fitted into the coupling groove 11 when the coupling synthetic resin tube 41 is coupled to the connector 10 in a one-touch type.

Figure 4 shows a cross-sectional view of the main portion of the connector of the present invention, the connector 10 is formed with a push bump 18 to one side of the pipe fixing groove 17 to which the synthetic resin pipe 40 is integrally coupled; On one side of the rolling prevention jaw 18, a pipe coupling groove 16 to which the end portion of the coupling synthetic resin pipe 41 is coupled is formed.

The inner rubber ring connecting groove 14 is formed with an inclined surface 15 and an inner rubber ring connecting groove 14 at one side of the tube fitting groove 16, (13) are formed.

A split jaw 12 and a front connecting groove 11 are formed on one side of the inner rubber ring 30 to which the inner rubber ring 30 is coupled and a front rubber ring 20 is disposed in the front connecting groove 11.

5 is a cross-sectional view of the front rubber ring of the present invention. The outer rubber ring 20 has an outer diameter symmetrically protruding from both sides in the form of a triangle as in the case of the inclined surface 21, The first watertight projection 23 and the second watertight projection 24 having air pockets inwardly of the projection engagement grooves 22 are formed in the protruding engagement grooves 22 at right angles Respectively.

Fig. 6 shows a cross-sectional view of the inner rubber ring of the present invention, and Fig. 7 shows a cross-sectional view showing another embodiment of the inner rubber ring of the present invention.

The inner rubber ring 30 is formed with an engaging groove 32 which engages with the rubber ring engaging jaw 13 inside the engaging groove 31. The inner diameter of the engaging groove 32 is constant Protrusions 34 protruding obliquely toward the inside in the space are protruded. A groove 33 is formed on the outer side of the protrusion 34.

An outer diameter coupling protrusion 35 and an inner diameter coupling protrusion 36 protruding from the outer diameter toward the inside of the coupling groove 32 and positioned at the inclined surface 15 are formed at an end portion of the outer diameter coupling protrusion 35, And the protrusions 36 are cut through the cutout grooves 37 to be divided.

As shown in Fig. 7, the inner rubber ring 30 is provided so as to further protrude the fixed vane 38 in the outer diameter direction so as to maintain the watertightness in the inner diameter of the division tuck 12.

FIG. 8 is a cross-sectional view of a mold according to the present invention, FIG. 9 is a sectional view of a rubber ring of the present invention, and FIG. 10 is a sectional view of the mold of the present invention.

The connector forming apparatus 100 for forming the connector 10 integrally by coupling to one end of the synthetic resin pipe 40 in the form of a single-necked collar has an operating shaft 112 to which a cylinder shaft 111 protruding from the hydraulic cylinder 110 is connected. ) Is installed to reciprocate and installed to the outer diameter of the operating shaft 112 to install an internal molding mold 120 of variable size, the connector 10 is molded in the outer diameter of the internal molding mold 120 A molding space 130 having a space, and an outer molding mold 140, which is divided into several equal parts and assembled into a cylindrical shape by the coupling, is installed in the outer diameter of the inner molding mold 120 and the molding space 130.

A fixing body 150 and a moving body 160 are installed on one side of the outer forming die 140.

In the outer diameter of the inner molding mold 120 is formed so that the inner rubber ring groove 121 is coupled to the inner rubber ring 30 and the tube insertion groove 122 is coupled to the synthetic resin tube 40 is located.

11 is an enlarged cross-sectional view of the main portion showing another embodiment of the present invention, in place of the engaging projection ring 42, the engaging projection ring 42 is located at the outer diameter of the coupling synthetic resin tube 41 45 can be provided and fixed to be integral with the melting part 46, and can be used.

The present invention having such a configuration is configured to drive the hydraulic cylinder 110 such that the cylinder axis 111 advances the operation shaft 112 to be divided into several pieces and the outer diameter of the inner forming mold 120, The inner rubber ring 30 is engaged with and fixed to the inner rubber ring groove 121.

When the inner rubber ring 30 is inserted, the hydraulic cylinder 110 is driven to move the cylinder shaft 111 backward so that the operating shaft 112 is divided into several pieces of the inner molding groove 120, .

Then, the outer rubber ring 30 at the outer diameter of the inner shaping mold 120 is provided with a precisely set position at which it is to be fixed.

The outer molding die 140 is positioned on the outer periphery of the molding space 130 having the shape in which the connector 10 is to be molded and synthetic resin is supplied in a molten state from a portion not shown and filled in the molding space 130 .

When the molten synthetic resin is filled in the molding space 130, the connecting hole 10 is molded into a predetermined shape, and the inner rubber ring 30 is integrally formed on the inner diameter.

The inner rubber ring 30 is molded integrally with the defect groove 32 while the molten synthetic resin filling the molding space 130 is molded integrally with the outer diameter.

After the molten synthetic resin is supplied, the cooling cylinder 10 is cooled through the cooling process, and then the outer mold 140 is opened again. Then, the hydraulic cylinder 110 is driven to move the operation shaft 112 through the cylinder shaft 111 forward And the outer diameter of the inner forming metal mold 120 divided into several pieces is reduced.

When the outer forming die 140 is opened and the outer diameter of the inner forming die 120 is reduced, the connecting hole 10 is separated to the outside and the molding is completed.

The inner molding die 120 is supplied with the inner rubber ring 30 with an outer diameter so that the molten synthetic resin supplied to the molding space 130 is filled to be molded integrally so that the inner rubber ring 30 The watertightness can be safely maintained by preventing water leakage that may occur in the assembled portion from occurring.

The connector 10 is coupled to the outer ring portion of the coupling synthetic resin pipe 41 on both sides of the coupling projection ring 42 and then coupled to the front rubber ring 20 by the coupling projection ring 22 in the coupling projection ring 22 This position is provided to provide a combined state, and then coupled to provide a one-touch coupling the synthetic resin pipe 41 on one side of the connector 10 formed in a single-collar form.

When the connector 10 is formed in the ground after the connector 10 is molded as described above, the end of the joint synthetic resin tube 41 is pushed into the one-touch type by the inner diameter of the connector 10, and the tube coupling groove 16 is formed. Combining up to), it is possible to complete the buried without the need for a separate device or structure to maintain the watertight.

When coupling the synthetic resin pipe 41 to the connector 10 in a one-touch type, the anti-rolling projection 34 and the outer diameter coupling protrusion 35 and the inner diameter coupling protrusion 36 formed on the inner diameter of the inner rubber ring 30. By providing a state that can maintain the watertight through,

Since the inner rubber ring 30 is pressed inward through the outer diameter of the coupling synthetic resin tube 41, the outer diameter coupling protrusion 35 maintains watertightness on the inclined surface 15, and the inner diameter coupling protrusion 36 is While being pressed by the incision groove 37, the outer diameter of the combined synthetic resin tube 41 can be wrapped to maintain the watertightness, and the anti-rolling protrusion 34 protruding at regular intervals into the inner diameter is wrapped around the outer diameter of the combined synthetic resin tube 41. Will be maintained.

The inner diameter coupling protrusion 36 is formed to be inclined inward in addition to the function of surrounding the outer diameter of the coupling synthetic resin tube 41 to maintain the watertightness, so that the coupling synthetic resin tube 41 is pushed outward by the thermal expansion coefficient and separated. It can be prevented.

In addition, the anti-rolling projection 34 is formed inward at a predetermined interval so that the coupling is made of a synthetic resin tube 41 is easily provided with a space that can be deformed by the groove 33, the coupling synthetic resin tube (41) can be prevented from being pushed out by the thermal expansion coefficient to be separated.

At the same time, the front rubber ring 20 coupled to the engaging projection ring 42 provides a larger outer diameter on the outside of the front connecting groove 11. However, when entering the front connecting groove 11, Since the elastic deformation space in the form of an air pocket is provided through the first watertight protrusion 23 and the second watertight protrusion 24, the elasticity can be ensured while absorbing the deformation amount, After completion, the watertight state can be stably maintained in all directions.

Hereinafter, a manufacturing method of integrally forming a connector in a synthetic resin pipe according to a preferred embodiment of the present invention will be described in detail through respective steps.

[Example]

end. Inner rubber ring forming step (S1)

Molding the inner rubber ring (30) by injection or extrusion through an independent mold; The engaging groove 32 is formed at one side of the fixing protrusion 31. The inner diameter of the fixing protrusion 31 and the engaging groove 32 allows the groove 33 and the anti-slide protrusion 34 to be formed at regular intervals, And at the end thereof, the outer diameter coupling protrusion 35 and the inner diameter coupling protrusion 36 are formed on the basis of the incision groove 37.

I. The inner rubber ring supply step (S2)

The outer diameter of the inner forming die 120 is reduced and the inner rubber ring 30 is engaged with the inner rubber ring groove 121.

All. In the step of bonding the synthetic resin tube to the mold (S3)

A synthetic resin pipe (40) is fitted from outside into a tube insertion groove (122) formed on the outer diameter of the inner forming metal mold (120).

la. The mold setting step (S4)

The outer diameter of the inner molding mold 120 is enlarged to fix the inner diameter of the synthetic resin tube 40, and the outer diameter of the outer molding mold 140 is reduced to set the mold so that the molding space 130 is formed.

hemp. The molten synthetic resin supplying step (S5)

The molten synthetic resin obtained by melting the synthetic resin is supplied to the molding space 130 to be filled in the molding space 130 and supplied to the outer diameter of the inner rubber ring 30 so that the inner rubber ring 30 is integrated with the inner diameter of the connecting hole 10 It is molded.

bar. The mold cooling and separation step (S6)

The inner molding die 120 and the outer molding die 140 are cooled so that the outer diameter of the inner molding die 120 is reduced and the outer molding die 140 is opened to separate the molten synthetic resin .

four. Separation step of synthetic pipe and connector (S7)

The connection port 10 formed integrally with the synthetic resin pipe 40 is separated from the mold to complete molding of the connection port 10. [

In the present invention, the inner rubber ring is coupled to the outer diameter of the inner forming mold, and the connection port is integrally injection-molded by supplying the synthetic resin so that the watertightness is maintained by connecting the synthetic resin pipe to the connection port in a one- After the assembly, the watertightness is stably maintained by the inner rubber ring, and the watertightness of the synthetic resin pipe is stably maintained in the front connection groove through the front rubber ring.

10: Connector 11: Front connection groove
12: split jaw 13: rubber ring coupling jaw
14: inner rubber ring connection groove 15: inclined surface
16: tube fitting groove 17: tube fixing groove
18: jaw protector 20: front rubber ring
21: a head slope 22: a projection engagement groove
23: primary watertight projection 24: secondary watertight projection
30: Inner rubber ring 31: Fixing projection
32: coupling groove 33: groove
34: protrusion protrusion 35: outer diameter coupling projection
36: inner diameter coupling protrusion 37: incision groove
40: synthetic resin pipe 41: bonded synthetic resin pipe
42: engaging protrusion ring
45: engaging projection 46:
100: connector forming apparatus 110: hydraulic cylinder
111: Cylinder shaft 112: Operation shaft
120: inner forming mold 121: inner rubber ring groove
122: tube insertion groove 130: molding space
140: outer molding die 150: fixing body
160: moving body

Claims (4)

delete External molding in which the connector 10 for connecting the synthetic resin tube 41 is integrally formed on one side of the synthetic resin tube 40, and the molding space 130 having the outer diameter shape of the connector 10 is formed in the inner diameter. A mold 140; The front connecting groove 11 is formed in the inner diameter of the molding space 130, and the anti-rolling protrusion 34 is formed to be coupled to the inner diameter of the fixing protrusion 31 and the coupling groove 32, and the inner diameter coupling protrusion ( An inner molding mold 120 having an inner rubber ring groove 121 coupling the inner rubber ring 30 formed to an outer diameter of the 36 to an outer diameter and a tube insertion groove 122 to which the synthetic resin pipe 40 is coupled; Coupling to the inner rubber ring groove 121 and the outer diameter engaging projection 35 is formed on the inclined surface 15 inwardly to form a projection preventing projection 34 at a predetermined interval by the inner diameter of the fixing projection 31 and the coupling groove 32. In the molding apparatus of the connector for joining the synthetic resin pipe consisting of; inner rubber ring 30 is formed by cutting the inner diameter coupling protrusion 36 is cut into the incision groove 37,
The connector 10 forms a rubber ring coupling jaw 13 in which the coupling groove 32 is located at one side of the split jaw 12 inside the front connection groove 11 to which the front rubber ring 20 is coupled. The front rubber ring 20 and the synthetic resin pipe 40 are integrally formed by forming a pipe coupling groove 16 in which an end of the inclined surface 15 and the coupling synthetic resin pipe 41 are positioned in the inner rubber ring connecting groove 14. Molding apparatus of the connector for joining the synthetic resin pipe to maintain the watertightness by integrally coupled to the inner rubber ring, characterized in that molded into.
External molding in which the connector 10 for connecting the synthetic resin tube 41 is integrally formed on one side of the synthetic resin tube 40, and the molding space 130 having the outer diameter shape of the connector 10 is formed in the inner diameter. A mold 140; The front connecting groove 11 is formed in the inner diameter of the molding space 130, and the anti-rolling protrusion 34 is formed to be coupled to the inner diameter of the fixing protrusion 31 and the coupling groove 32, and the inner diameter coupling protrusion ( An inner molding mold 120 having an inner rubber ring groove 121 coupling the inner rubber ring 30 formed to an outer diameter of the 36 to an outer diameter and a tube insertion groove 122 to which the synthetic resin pipe 40 is coupled; Coupling to the inner rubber ring groove 121 and the outer diameter engaging projection 35 is formed on the inclined surface 15 inwardly to form a projection preventing projection 34 at a predetermined interval by the inner diameter of the fixing projection 31 and the coupling groove 32. In the molding apparatus of the connector for joining the synthetic resin pipe consisting of; inner rubber ring 30 is formed by cutting the inner diameter coupling protrusion 36 is cut into the incision groove 37,
The inner rubber ring 30 is located in the inner rubber ring connecting groove 14 and a fixing protrusion 31 is formed on the outside of the coupling groove 32 to be coupled to the rubber ring coupling jaw 13, the fixing protrusion ( 31 and a plurality of concave grooves 33 and anti-rolling projections 34 at regular intervals with an inner diameter of the coupling groove 32 and the outer diameter coupling protrusion 35 and the inner diameter coupling protrusion (inwardly located on the inclined surface 15) Forming apparatus of the connector for joining the composite resin pipe to maintain the water tightness by integrally combined with the inner rubber ring, characterized in that 36 is cut into the incision groove 37 is formed integrally with the connector (10).
The method of claim 3, wherein
The inner rubber ring 30 is formed to be integral with the connector 10 by forming a protruding wing 38, which is located at the inner diameter of the dividing jaw 12 in the inner diameter of the fixing projection 31 is formed integrally. Molding apparatus of the connector for joining synthetic resin pipes to which the internal rubber ring is integrally combined to maintain watertightness.

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