JPH0919960A - Pipe end molding die replacement method and pipe end processing device - Google Patents

Abstract

(57) [PROBLEMS] To provide a pipe end molding die replacement method and a pipe end processing device capable of shortening the replacement time of the mold body and reducing the number of parts. SOLUTION: The pipe 1 is arranged along the outer periphery of the tip end portion of a shaft-shaped die body 2, and adjacent ends are airtightly engaged with each other, and are fitted to the tip end portion of the die body. End 1
a plurality of divided container members 42 that form an airtight chamber with a,
43 is moved in a direction away from each other in a direction intersecting with the axis of the mold body 2 to move the mold body 2 toward the base end side in the axial direction, and thereby the tip portion of the mold body 2 is moved. After removing from the space between the divided container members 42 and 43, the die body 2 is moved in a direction intersecting the axis of the die body 2 for replacement, and a pipe end forming die replacement method and pipe end. Processing equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for exchanging a pipe end forming die used for heat-deforming an end of a pipe made of a thermoplastic resin material, and a pipe end processing. It relates to the device.

[0002]

2. Description of the Related Art This pipe end processing apparatus is used for processing a receiving end at the end of a PVC pipe or the like used for water supply and drainage of buildings, water and sewerage, etc. Examples of this type of conventional type include those shown in FIGS. 7 to 16 (see Japanese Patent Application Laid-Open No. 55-73513, Japanese Utility Model Publication No. 61-2023, etc.). With something like this,
First, the shell 5a on the front end side 2a of the mold body 2 (molding mold) is fitted into the end 1a of the heated resin pipe 1 in a bulged state (FIG. 9).

While the seal portion 4 of the intermediate airtight cylinder 3 seals the intermediate peripheral surface 2c adjacent to the base end portion 2b of the mold body 2, the end portion 1a is attached to the front surface 4a of the seal portion 4. Abut and stop. The intermediate airtight cylinder 3 has a cylindrical portion 6 extending from the seal portion 4 to the periphery of the molding portion 5 on the tip side 2a. The opening 8 on the front end side 7 of the cylindrical portion 6 is closed by the front door portion 10 of the outer member 9 to be in an airtight state (FIG. 10).

In this state, the space 11 formed by the front door portion 10 and the cylindrical portion 6 is air-pressurized to 5 to 9 atmospheres to press the end portion 1a against the molding portion 5 to have a predetermined shape. This end 1a is molded. At this time, the cooling air is introduced into the molding portion 5 through the air hole 4b formed in the seal portion 4 of the intermediate airtight cylinder 3.

The intermediate airtight cylinder 3 is slid on the peripheral surface 2c of the mold body 2 toward the base end 2b, and introduces cooling air into the space 11, whereby the end 1 is closed.
Cool a (FIG. 11).

After cooling, the shell 5a is immersed in the molding portion 5 (FIG. 12), the mold main body 2 is retracted to the right in the drawing, and the molding portion 5 is pulled out from the end portion 1a and made of resin. The molding of the end 1a of the pipe 1 is completed (FIG. 13).

This step is almost the same as that of the so-called sleeve-type die 12 in which the shell 5a is not projected and retracted from the molding portion 5 shown in FIGS. The same is done. In this sleeve mold 12, the intermediate airtight cylinder 3 is changed to a sliding seal member 13 without the cylindrical portion 6.

The change of the die body is carried out as shown in FIGS. 7 and 8. That is, first, the outer member 9 is removed,
The piston rod 14a of the hydraulic cylinder 14 connected to the mold body 2 is contracted to the retracted position by moving to the storage location. Then, the mold exchanging jig 15 is applied from below the intermediate airtight cylinder 3, and the intermediate airtight cylinder 3 is pulled out from the tip portion 2a side. After the change of the mold body 2, this time, the assembly is performed by the procedure reverse to the above procedure.

At the time of this replacement, in order to support the weight of the die main body 2, the connecting structure between the tip end portion of the piston rod 14a and the base end portion 2b side connection portion of the die body 2 is the base end portion 2b side connection. The flange portion 2d formed on the above portion faces the flange portion 14c formed on the tip end portion of the piston rod 14a, and is fixed by several bolts.

[0010]

However, in such a conventional example, the engagement between the peripheral surface 2c and the seal portion 4c is tight in order to improve the sealing property. For this reason, when the intermediate airtight cylinder 3 is pulled out from the tip 2a side when the die body is replaced, the piston rod 14a of the hydraulic cylinder 14 is once retracted, and the force of this retraction is used to remove the engagement. ing. Therefore, when the fitting is removed, the piston rod 14
The stroke of "a" has reached the full retracted position, the mold exchanging jig 15 is inserted into the gap between the outer member 9 and the intermediate airtight tube 3, and this time the intermediate airtight tube 3 is pulled out to the right in FIG. There must be. However, since the intermediate airtight tube 3 has a large outer shape and a large weight, it must be supported from below by using a large mold exchanging jig 15 that can bear a load. Due to the insertion of the large mold changing jig 15, the outer member 9 had to be removed while avoiding interference.

Further, unless the outer diameter of the molding portion 5 is smaller than the inner diameter of the sealing portion 4, it cannot be extracted from the tip portion 2a side, and the peripheral surface 2c having the same diameter or more than the outer diameter of the molding portion 5 is formed. Depending on the type of mold body 2 formed, a plurality of seal parts 4
It was necessary to prepare the intermediate airtight cylinder 3 having the inner diameter dimension of 3 and replace it at the same time as the mold body.

Therefore, there is a problem that it takes a long time for replacement, the number of parts is increased, and a storage space for parts is required to be wide.

Therefore, it is an object of the present invention to provide a pipe end forming die replacement method and a pipe end processing apparatus which can shorten the time for replacing the die body and reduce the number of parts.

[0014]

In order to solve this problem, the invention of claim 1 is arranged along the outer periphery of the tip end portion of a shaft-shaped mold body, and adjacent end portions are airtightly engaged with each other. And moving a plurality of divided container members forming an airtight chamber between the end of the die body and the end of the pipe fitted to the tip end of the die body in the direction intersecting the axis of the die body and away from each other. A direction that intersects with the axis of the mold body after separating and separating the tip part of the mold body from between the divided container members by moving the mold body toward the base end side in the axial direction. In addition, the method of replacing the pipe end portion molding die, in which the mold body is moved and replaced, is used.

In order to solve the above-mentioned problems, the invention of claim 2 provides a shaft-shaped mold body having an outer peripheral surface for pipe molding provided at its tip, and the mold in a heated state. An airtight chamber forming container that forms an airtight chamber between the outer peripheral surface of the pipe end fitted to the outer peripheral surface of the tip of the main body, and the pipe end is fitted to the outer peripheral surface of the tip of the mold body. A pipe end portion processing device for forming the pipe end portion by pressing the pipe end portion against an outer peripheral surface of a tip end portion of a mold body by supplying a pressurized fluid to the airtight chamber in a sealed state, the airtight chamber forming container Has a divided container member that is divided into a plurality of parts in a direction intersecting the axis of the mold body, container driving means for driving the divided container members to move back and forth relative to each other is provided, and the base end portion of the mold body is an axis line. Holds it so that it can move in a direction orthogonal to A mold holding member that is driven to move back and forth is provided, and a holding member driving means that moves the mold holding member to a withdrawal position where the tip end portion of the mold body comes off the airtight chamber forming container is provided, and the withdrawal position In (1), the pipe end processing apparatus is provided with a mold exchanging means for exchanging the die main body in a direction orthogonal to the axis.

[0016]

[Operation] According to the pipe end molding die replacement method of the present invention, when the die body is replaced, the plurality of divided container members are separated from each other in a direction intersecting the axis of the die body. The mold body by moving the mold body away from each other in the direction, and moving the mold body toward the base end side in the axial direction to remove the tip end portion of the mold body from between the divided container members, and then to the axis line of the mold body. Since the mold body is moved in the intersecting direction for replacement, the mold body can be replaced easily and in a short time.

At this time, after the separating container members are moved away from each other by the container driving means, the mold holding member is held by the mold holding member up to the extraction position where the tip of the mold body is removed from between the divided container members of the airtight chamber forming container. It is moved by the driving means. Then, at this extraction position, the mold replacement means moves the mold main body in the direction orthogonal to the axis to replace it with a new one.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
Description will be given based on FIG. It should be noted that the same or similar parts to the conventional ones are designated by the same reference numerals, and detailed description thereof will be omitted.
1 to 6 of the present embodiment, the pipe 1 and its end portion 1a are not shown, but the pipe 1 and the end portion 1a used in the conventional example are used for convenience of explanation, ,
For this point, refer to the conventional pipe 1.

1 to 5, a pipe end portion processing apparatus according to the present invention has a rectangular parallelepiped shape serving as a mounting base for a shaft-shaped mold body 2 and parts arranged around the mold body 2. It has a frame.

The frame 20 includes rod supporting plate portions 21 and 21 integrally provided on the left and right of the lower front portion, a cylinder supporting plate portion 22 integrally provided at the center of the lower front portion, a rod supporting plate portion 21, 21 and the cylinder support plate portion 22 are integrally provided on the left and right sides and the center of the upper end of the front side, and rod support plate portions 21 'and 21' and the cylinder support plate portion 22 '.
Having. Brackets 23, 23 for rod support are integrally provided upward in the vicinity of the rear edges of the rod support plate portions 21, 21, and rod support walls 24, 24 are provided on the left and right of the rear edge of the frame 20. A cylinder mounting wall 25 is integrally provided at the left and right center of the rear edge of the frame 20. A cylinder mounting base 26 is integrally provided at the lower end of one side of the frame 20.

Further, in the pipe end processing device, guide rods (holding member guide means) 30, 30 having front and rear ends fixed to the brackets 23, 23 and the rod support walls 24, 24 are provided.
And the guide rods 30 and 30 have tubular portions 31 at both lower ends.
a and 31a are slidably fitted and held in the mold holding member 31 in the form of a thick plate, a cylinder (holding member driving means) 32 fixed to the cylinder mounting wall 25, and the mold holding member 31. The mounting plate 33 has the mold main body 2 integrally provided at the base end. Also, the piston rod 32a of the cylinder 32
A die holding member 31 is fixed to the tip of the guide rod 3 by a cylinder 32.
It is driven back and forth along 0 and 30.

The mold holding member 31 is provided with a dovetail-shaped (T-shaped cross-section) mounting groove 31b extending rightward and leftward (direction orthogonal to the axis of the mold body 2). The mounting plate 33 is held in the mounting groove 31b so as to be movable left and right. The mounting plate 33 is usually fixed to the mold holding member 31 with a bolt or the like (not shown), but when the mold body 2 is replaced, the bolt can be removed to remove the left and right (mold body 2
It is possible to move in a direction orthogonal to the axis line of. When the end of the pipe 1 is molded using the die body 2, the tip 1a of the die body 2 is heated with the end 1a of the pipe 1 being heated as in the conventional case. Is fitted to the surface.

Further, the pipe end processing device is a mold main body 2
Has an airtight container 40 arranged around the tip of the. The airtight container 40 is an airtight chamber forming container 41 which is one of the members for forming an airtight chamber between the pipe 1 and the outer peripheral surface of the end 1 a of the pipe 1, and the pipe 1 in cooperation with the airtight chamber forming container 41. It has an intermediate airtight cylinder 3 which forms an airtight chamber between the end 1a and the outer peripheral surface of the end 1a. The intermediate airtight cylinder 3 has a ring-shaped seal portion 4 airtightly fitted to the intermediate portion 2c of the mold body 2, and a rear end of the seal portion 4 is airtightly fixed to the mold body 2. It has a cylindrical portion 6 that covers the tip portion, and is arranged in the airtight chamber forming container 41.

The airtight chamber forming container 41 is composed of divided container members 42 and 43 which are vertically divided into two parts (a plurality of parts in a direction intersecting the axis of the mold body 2). The divided container members 42 and 43 are semi-cylindrical container bodies 42a,
43a and a semi-disc-shaped front door (front side plate) 4 which is detachably and airtightly fixed to the front ends of the container bodies 42a, 43a.
It is composed of 2b and 43b.

Flanges 42c and 43c are provided on the sides of the mating portions of the container bodies 42a and 43a. The flanges 42c, 43c are provided with a pair of left and right guide rods 44, 44 and 44, 4 which pass therethrough vertically.
4 is held so that it can move up and down. This guide rod 4
4, 44 and 44, 44 are left and right rod support plate portions 2
1, 21 'and rod support plate portions 21, 21', respectively. In addition, front doors (front side plates) 42b, 43b
Semi-disc shaped rubber sheets 45, 45 'are attached to the inner surface of the.

Between the rubber sheets 45, 45 'of the airtight chamber forming container 41, the end portion of the pipe (the same as the end portion 1a of the pipe 1 shown in the conventional example), and the intermediate airtight cylinder 3, there is an air gap. A closed room is formed. In FIGS. 4 and 5, 42d and 43d are cooling air supply ports for supplying the cooling air to the airtight chamber side under the same conditions as the conventional one.

Moreover, cylinders (container driving means) 46, 4 for driving the divided containers are provided on the cylinder support plate portions 22, 22 '.
6'is fixed, and the divided container members 42, 43 are fixed to the piston rods 46a, 46a 'of the cylinders 46, 46'. Thereby, the divided container members 42, 43
Are vertically driven by cylinders 46 and 46 '.

The seal portion 4 of the intermediate airtight cylinder 3 is fixed to a ring plate 47, and the ring plate 47 is fixed to piston rods 48a and 48a of slide cylinders 48 and 48. The slide cylinders 48, 48 are provided in parallel with the guide rod 30 and the cylinder 32, and the rear ends of the slide cylinders 48 are fixed above and below the cylinder mounting wall 25. The lower slide cylinder 48 and the mold holding member 31 can be moved relative to each other at a position (not shown) in a direction parallel to the axis of the mold body 2.

In this cylinder 32, the mold holding member 31 is placed on the cylinder mounting wall 25 side up to the extraction position P where the tip of the mold body 2 is removed from the intermediate airtight cylinder 3 of the airtight container 40 and the airtight chamber forming container 41. It is designed to be driven (moved). A mold exchanging means 50 for exchanging the die body 2 by moving the die body 2 in the direction (right and left) orthogonal to the axis is provided at the extracting position P.

The mold exchanging means 50 is arranged at a position behind the mounting plate guide plate 51 fixed to one of the rod supporting walls 24, 24 of the frame 20 corresponding to the withdrawal position P, and behind the mounting plate guide plate 51. Rail mounting plate 52 fixed to the side portion of the frame 20 and T-shaped guide rails 53, 53 fixed to the rail mounting plate 52 in parallel with each other in the vertical direction.
An elevating member 54 vertically movably held by the guide rails 53, 53, a cylinder 55 (elevating drive means) fixed vertically to the cylinder mounting base 26 of the frame 20, and a front surface of the elevating member 54. It has a fixed mold holding plate 56 for holding a replacement mold. An elevating member 54 is attached to the piston rod 55a of the cylinder 55, and the elevating member 54 is driven up and down by the cylinder 55.

The mounting plate guide plate 51 has a guide groove 51a extending in a direction (horizontal direction) orthogonal to the axis of the mold body 2 and having a T-shaped cross section. Further, the mold holding plate 56 is in a direction (left-right direction) orthogonal to the axis of the mold body 2.
Mounting grooves 56a, 5 extending in the vertical direction and having a T-shaped cross section
It has 6b at the top and bottom. In the figure, the mounting groove 56b holds the mounting plate 33 'of the mold body 2'having a different molding diameter from the mold body 2 held by the mold holding member 31.

Next, the operation of exchanging the die main body of the pipe end processing apparatus having the above construction will be described. The mold body 2, the intermediate airtight cylinder 3, the airtight chamber forming container 41 (the divided container members 42,
The operation of forming the receiving end at the end 1a of the pipe 1 by the function of the outer member 9 when the members 43 are aligned with each other is the same as the conventional operation, and therefore the description thereof is omitted.

In the case of exchanging the die main body 2 in such a structure, first, the plurality of divided container members 42, 43 are separated by the metal by the divided container driving cylinders (container driving means) 46, 46 '. The mold body 2 is moved and separated in a direction intersecting with the axis of the mold body 2 (up and down). After this,
By operating the cylinder 32 and moving the mold holding member 31 to the cylinder mounting wall 25 side, the extraction position at which the tip of the mold body 2 comes off from the intermediate airtight cylinder 3 and the airtight chamber forming container 41 of the airtight container 40. The cylinder 32 is moved to P, and the operation of the cylinder 32 is stopped.

At the extraction position P, the mounting plate guide plate 51
The guide groove 51a is aligned with the mounting groove 31b of the mold holding member 31. This position is determined by the guide groove 51a and the mounting groove 3
This can be easily performed by matching the heights of 1b in advance and controlling the expansion / contraction operation of the cylinder 32 using a microswitch or the like not shown.

At the mounting position P, the cylinder 55 of the mold exchanging means 50 moves the elevating member 54 to the guide rail 53,
The mounting groove is controlled to move up and down along 53, and the new mold body 2 is not held (the mounting groove 56a on the upper side in this embodiment).
Are aligned with the guide groove 51a.

At this position, a clamp means such as a bolt for fixing the mounting plate 33 of the die body 2 held by the die holding member 31 to the die holding member 31 is operated to operate the die body 2
Is released from the mold holding member 31, the mold main body 2 is moved to the side of the mounting plate guide plate 51, and the mounting plate 33 is inserted into the mold holding plate 56 through the guide groove 51a of the mounting plate guide plate 51. After fitting in the mounting groove 56a, the mounting plate 33 is fixed to the mold holding plate 56 by a clamp means such as a bolt (not shown).

Next, the cylinder 55 of the mold exchanging means 50 controls the elevating member 54 to elevate and lower along the guide rails 53, 53 to attach a new die main body 2'to the mounting groove (in this embodiment). Then, install the upper mounting groove 56b) into the guide groove 51a.
To match. At this position, a clamp means such as a bolt for fixing the mounting plate 33 of the new mold body 2 ′ held by the mold holding plate 56 to the mold holding plate 56 is operated to operate the mold body 2 ′. Is released from the mold holding plate 56, the new mold body 2'is moved to the mounting plate guide plate 51 side, and the mounting plate 33 is held via the guide groove 51a of the mounting plate guide plate 51. After fitting into the mounting groove 31a of the holding member 31, the mounting plate 33 is fixed to the mold holding member 31 by a clamp means such as a bolt (not shown).

After that, the cylinder 32 is operated to move the mold holding member 31 to the airtight container 40 side,
The tip of the new mold body 2'is inserted into the intermediate airtight cylinder 3 of the airtight container 40, and the operation of the cylinder 32 is stopped. Next, a cylinder for driving the divided container (container driving means)
46, 46 'allow a plurality of divided container members 42, 43
By moving them in a direction approaching each other in the direction intersecting with the axis of the mold body 2 (up and down) to align the split container members 42, 43 with each other, while corresponding to the outer diameter of the new mold body 2 ' The front doors (front side plates) 42b and 43b having the above inner diameters are prepared, and the front doors (front side plates) 42b and 43b are replaced with those attached to the front ends of the container bodies 42a and 43a. As a result, the replacement work of the mold body 2'is completed easily and in a short time.

Incidentally, in the replacement work of the mold body 2 at such a drawing position P, the mold holding member 31 of the mold body 2
For the movement work between the mold holding plate 56 and the mold holding plate 56, a drive mechanism such as a rack and pinion and a servo motor (not shown), or a drive means such as an air cylinder or a hydraulic cylinder can be used. Further, a roller or the like can be used to guide the movement between the mounting grooves 31b and 56a, 56b.

Further, also when replacing a mold (mold body) having a different tube diameter, the inner diameter (caliber) of the seal portion 4 of the intermediate airtight cylinder 3 is adjusted to the larger mold, and the seal portion 4 is used.
Is made of a material that can be elastically deformed to some extent, or by attaching a seal ring to the inner surface of the seal portion 4,
Replacement of new mold body 2'and front door (front side plate) 42b, 4
Only the replacement of 3b eliminates the need to replace the container bodies 42a and 43a and the intermediate airtight cylinder 3.

[0041]

As described above, according to the invention of claim 1, the shaft-shaped mold body is arranged along the outer periphery of the tip portion, and the adjacent end portions are airtightly engaged with each other, A plurality of divided container members forming an airtight chamber with a pipe end fitted to the tip of the mold body are moved and separated from each other in a direction intersecting with the axis of the mold body. ,
After moving the mold body toward the base end side in the axial direction to remove the tip part of the mold body from between the divided container members, the mold is formed in a direction intersecting with the axis line of the mold body. Since the main body is moved and replaced, the mold main body replacement time can be shortened and the number of parts can be reduced.

According to a second aspect of the present invention, a shaft-shaped mold body having an outer peripheral surface for forming a pipe at the tip portion is fitted to the outer peripheral surface of the tip portion of the mold body in a heated state. An airtight chamber forming container that forms an airtight chamber between the pipe end and the outer peripheral surface of the pipe end, and the pipe end is fitted to the outer peripheral surface of the die body while the pipe end is fitted to the airtight chamber. A pipe end processing device that presses the pipe end against the outer peripheral surface of the tip end of the mold body by supplying a pressurized fluid, and the airtight chamber forming container intersects the axis of the mold body. Having a plurality of divided container members in the direction to be provided, container drive means for driving the divided container members forward and backward with respect to each other is provided,
While holding the base end of the mold body so as to be movable in a direction orthogonal to the axis, a mold holding member that is driven to move back and forth in the axial direction of the mold body is provided, and the tip of the mold body is Holding member driving means for moving the mold holding member to a withdrawal position where the mold holding member is removed from the airtight chamber forming container is provided,
Since the pipe end processing device has a die exchanging means for exchanging the die main body in the direction orthogonal to the axis at the extraction position and exchanging the die main body, the die main body exchanging time can be shortened similarly to the above. The number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a pipe end processing apparatus showing an embodiment of the present invention.

FIG. 2 is a left side view of the pipe end processing apparatus shown in FIG.

FIG. 3 is an explanatory view of the pipe end processing apparatus shown in FIG. 2 when a mold body is removed.

FIG. 4 is a sectional view taken along the line AA of FIG. 2;

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a sectional view taken along the line CC of FIG. 2;

FIG. 7 is a partial cross-sectional view of a main part illustrating a conventional example and illustrating how the mold body is replaced.

FIG. 8 is a partial cross-sectional view of a main part illustrating a conventional example and illustrating how the mold body is replaced.

FIG. 9 is a cross-sectional view showing a conventional example and showing a process of processing an end portion using a mold body that requires pressurization.

FIG. 10 is a cross-sectional view showing a conventional example and showing a process of processing an end portion using a mold main body that requires pressurization.

FIG. 11 is a cross-sectional view showing a conventional example and a process of processing an end portion using a mold main body that requires pressurization.

FIG. 12 is a cross-sectional view showing a conventional example and showing a process of processing an end portion using a mold main body that requires pressurization.

FIG. 13 is a cross-sectional view showing a conventional example and a process of processing an end portion using a mold main body that requires pressurization.

FIG. 14 is a cross-sectional view showing a conventional example and a process of processing an end portion using a sleeve-type mold body.

FIG. 15 is a cross-sectional view showing a conventional example, showing a process of processing an end portion using a sleeve-type mold body.

FIG. 16 is a cross-sectional view showing a conventional example and showing a process of processing an end portion using a sleeve-type mold body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pipe 1a ... End part 2 ... Mold main body 31 ... Mold holding member 32 ... Cylinder (holding member driving means) 41 ... Airtight chamber forming container 42, 43 ... Divided container member 46, 46 '... Cylinder (container driving means) ) 50 ... Mold changing means P ... Extraction position

Claims (2)

[Claims] 1. A pipe end, which is disposed along the outer periphery of the tip of a shaft-shaped mold body and has adjacent ends airtightly engaged with each other, and is fitted to the tip of the mold body. A plurality of divided container members that form an airtight chamber between them are moved away from each other in a direction that intersects with the axis of the mold body, and the mold body is moved toward the base end side in the axial direction. The pipe is characterized in that the tip end of the mold body is removed from between the divided container members by moving the mold body, and then the mold body is moved in a direction intersecting the axis of the mold body for replacement. How to replace the end mold. 2. A shaft-shaped mold body having an outer peripheral surface for forming a pipe at its tip, and an outer circumference of a pipe end fitted to the outer peripheral surface of the tip of the mold body in a heated state. By providing an airtight chamber forming container that forms an airtight chamber between the surface and the surface, by supplying a pressurized fluid to the airtight chamber in a state in which the pipe end is fitted to the tip outer peripheral surface of the mold body. A pipe end processing device that presses the pipe end against the outer peripheral surface of the tip of the mold body to form, and the airtight chamber forming container is divided into a plurality of parts in a direction intersecting the axis of the mold body. And a container drive means for driving the divided container members to move back and forth with respect to each other, holding the base end of the mold body so as to be movable in a direction orthogonal to an axis, and the mold body. A mold holding member that is driven to move back and forth in the axial direction of Holding member driving means for moving the mold holding member to a withdrawal position where the tip of the mold body comes off the airtight chamber forming container is provided, and at the withdrawal position, the mold body is moved in a direction orthogonal to the axis. An apparatus for processing a pipe end, characterized in that it has a mold exchanging means for exchanging.