JPH09272156A - Apparatus and method for removing core in a cylindrical molded body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain enough drawing force at initial releasing time by providing separately an apparatus used at the initial releasing time when a large drawing force is required and an apparatus used at the drawing time thereafter. SOLUTION: By constituting a placing stage 4 for a cylindrical molded body in such a way that it is divided into a plurality of placing stage, even when the length of the placed cylindrical molded body is different, the cylindrical molded body 3 can be surely placed and supported. An apparatus 5 for controlling movement of the cylindrical molded body is fixed on a drawing supporting stage 13 provided on one side of the placing stage 4 for the cylindrical molded body 4. In addition, by pushing one end part of the cylindrical molded body 3 placed on the placing stage 4 for the cylindrical molded body thereon, when a mandrel 2 is drawn out of the cylindrical molded body 3, it is controlled that the cylindrical molded body 3 is moved in the drawing direction of the mandrel 2. In this instance, the mandrel 2 is drawn out of the cylindrical molded body 3 through the inside of a ring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demolding device and a demolding method for a cylindrical molded body, and more particularly to a demolding method for a cylindrical molded body capable of obtaining a sufficient pulling force and reducing equipment costs. The present invention relates to a core device and a core removal method.

[0002]

2. Description of the Related Art Conventionally, in a decentering method using a demolding device for a cylindrical molded body of this type, a mandrel integrated with a cylindrical molded body having a cylindrical or square pipe shape is mounted on a roller table. Install it, set a ring plate with a hole diameter almost equal to the outer diameter of the mandrel on the same center as the mandrel, connect the shaft at the center of the mandrel to the hawk end of the hydraulic cylinder with the ring plate in between, and connect the hydraulic cylinder. It was driven to apply a pulling force to the mandrel.

At this time, since the mandrel is supported by the ring plate, only the cylindrical molded body remains on the roller type table, the cylindrical molded body and the mandrel can be separated, and the mandrel can be pulled out. .

[0004]

By the way, considering the productivity of the cylindrical molded body, the longer the mandrel, the more preferable.

However, in the decentering method using the conventional demolding device for a cylindrical molded body, the mandrel is pulled out by the hydraulic cylinder. Therefore, if the length of the mandrel is increased, the shaft of the hydraulic cylinder is further increased. Need to be long. However, the stroke limit of a general hydraulic cylinder is about 5 m, and in order to use a hydraulic cylinder having a stroke exceeding 5 m, it is necessary to specially manufacture such a hydraulic cylinder, and the equipment cost is high. There was a problem of being bulky.

Further, although a large drawing force can be exerted by using a hydraulic cylinder, a large drawing force is actually required only when the tubular molded body and the mandrel are initially peeled off. is there. Therefore, when the mandrel is pulled out from the tubular molded body after the initial peeling, a smaller pulling force is sufficient as compared with the time of the initial peeling, and it is not necessary to use the hydraulic cylinder throughout the entire process.

Therefore, the present invention has been proposed in view of the problems of the above-mentioned conventional technique, and is an apparatus used at the time of initial peeling requiring a large pulling force and an apparatus used at the time of subsequent pulling. It is an object of the present invention to provide a demolding device and a decentering method for a cylindrical molded body that can obtain a sufficient drawing force at the time of initial peeling and can reduce the equipment cost by separately providing .

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and its contents will be described below. The invention described in claims 1 to 3 is an invention relating to a decentering device for a cylindrical molded body, and claims 4 and 5
The invention described in (1) is an invention relating to a method for decentering a tubular molded body.

According to a first aspect of the present invention, there is provided a demolding device for a tubular molded body for pulling out the mandrel from the tubular molded body which is formed by being adhered to the outer periphery of the mandrel, the tubular body being integral with the mandrel. A tubular molded body mounting table on which the molded body is mounted,
A tubular molded body movement restriction that is located at one end of the tubular molded body placed on the tubular molded body mounting table and that regulates the movement of the tubular molded body when the mandrel is pulled out from the tubular molded body. A device and an initial peeling device that communicates with the mandrel placed on the tubular molded body support to perform initial peeling between the tubular molded body and the mandrel, and placed on the tubular molded body support. It is characterized in that it is provided with a pulling device which is in contact with the mandrel and pulls out the mandrel from the tubular molded body after the initial peeling, and a mandrel mounting table on which the mandrel after being pulled out from the tubular molded body is placed.

The second aspect of the present invention is the first aspect of the present invention.
In addition to the configuration of the described invention, the initial peeling device includes a hydraulic cylinder connected to one end of the mandrel on the pulling side, and the pulling device includes a winch connected to one end of the mandrel on the pulling side. And

The invention according to claim 3 is the above-mentioned claim 2.
In addition to the configuration of the invention described above, the initial peeling device includes a hydraulic cylinder, an arm rotatably attached to the rod tip of the hydraulic cylinder, the arm rotating with the driving of the hydraulic cylinder, and the mandrel pull-out side. Provided at one end, the free end of the arm comes into contact within the predetermined rotation range of the arm, moves the mandrel in the pull-out direction, and when the arm rotates beyond the predetermined rotation range,
And a contact member for releasing the contact.

According to a fourth aspect of the present invention, there is provided a method for decentering a tubular molded body for pulling out the mandrel from the tubular molded body formed by coating the outer periphery of the mandrel, wherein the tubular body is integrated with the mandrel. The first step of mounting the molded body on the cylindrical molded body mounting table, and positioning a cylindrical molded body movement restricting device for regulating the movement of the cylindrical molded body at one end of the cylindrical molded body, The second step of applying the pulling direction force to the mandrel to perform the initial peeling between the tubular molded body and the mandrel, and the pulling direction force which is smaller than that of the second step to the mandrel. However, the third step is to pull out the mandrel from the cylindrical molded body and place the pulled out mandrel on the mandrel mounting table.

The invention according to claim 5 is the above-mentioned claim 4.
In addition to the configuration of the invention described above, in the second step of performing the initial separation between the tubular molded body and the mandrel, the free end portion of the rotary arm rotatably attached to the rod tip portion of the hydraulic cylinder is
The mandrel is brought into contact with an abutting member provided at one end on the pull-out side, the hydraulic cylinder is driven to rotate the arm,
By applying a force in the pulling direction of the mandrel to the abutting member that abuts the free end of the arm, the initial peeling between the tubular molded body and the mandrel is performed, and when the arm rotates beyond the predetermined rotation range, It is characterized in that the contact between the free end portion of the arm and the contact member is released to complete the initial peeling.

Therefore, according to the above-mentioned invention, the following operation is achieved. That is, in the invention according to claim 1 or 4, in order to pull out the mandrel from the cylindrical molded body which is formed by being attached to the outer periphery of the mandrel, first, the cylindrical molded body integrated with the mandrel is cylindrically molded. Place on the body stand. Then, when pulling out the mandrel from the tubular molded body, a tubular molded body movement regulating device that regulates the movement of the tubular molded body is positioned at one end of the tubular molded body.

Next, a force in the pulling direction is applied to the mandrel by the initial peeling device to carry out the initial peeling between the cylindrical molded body and the mandrel.

When the initial peeling between the tubular molded body and the mandrel is completed, the mandrel is pulled out from the tubular molded body by applying a force in the pulling direction, which is smaller than that at the time of the initial peeling, to the mandrel by the pulling device. .

The mandrel after being pulled out is placed on the mandrel placing table, and the core removal of the cylindrical molded body is completed.

Therefore, according to the first or fourth aspect of the present invention, when the mandrel is pulled out from the tubular molded body adhered to the outer periphery of the mandrel and molded, a large pulling force is required at the time of initial peeling. By separately providing the device to be used and the device to be used in the subsequent drawing, a sufficient drawing force can be obtained in the initial peeling, and the equipment cost can be reduced.

According to the second aspect of the present invention, the initial peeling device is provided with a hydraulic cylinder, and the hydraulic cylinder exerts a large drawing force to perform the initial peeling between the tubular molded body and the mandrel.

The pulling device is equipped with a winch, and the mandrel is pulled out by the winch with a force smaller than that at the time of initial peeling.

Therefore, since the hydraulic cylinder capable of exerting a large pulling force is used only at the initial peeling and the winch having a large driving stroke is used at the time of pulling out the mandrel thereafter, it is a long cylindrical molded body. However, the mandrel can be pulled out from the tubular molded body that is adhered to the outer periphery of the mandrel and molded without using large-scale and expensive equipment.

According to the invention of claim 3 or 5,
In order to perform the initial separation between the cylindrical molded body and the mandrel, first, the free end of the rotating arm that is rotatably fixed to the rod tip of the hydraulic cylinder is attached to one end on the pull-out side of the mandrel. Contact the member.

When the hydraulic cylinder is driven, the arm rotates, and a force in the pulling direction of the mandrel is applied to the abutting member abutting the free end of the arm. Since the contact member to which the pulling force is applied is in communication with the mandrel, the mandrel is pulled out from the tubular molded body, and the tubular molded body and the mandrel can be initially separated.

When the arm further rotates, the contact between the free end portion of the arm and the contact member is released, and the initial peeling ends.

Therefore, since the initial peeling operation by the initial peeling device can be automatically completed, the cylindrical molded body can be decoreed more easily.

[0026]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of a demolding device for a cylindrical molded body according to the present invention,
FIG. 1 is a side view of a core removing device, FIG. 2 is a schematic configuration diagram of a core removing device for explaining an initial peeling operation during core removal of a tubular molded body, and FIG. 3 is a drawing operation during core removal of the tubular molded body. FIG. 4 is a schematic configuration diagram of a core removing device, FIG.
FIG. 5 shows a front view of the mandrel mounting table.

As shown in FIG. 1, a tubular molded body decentering apparatus 1 includes a cylindrical molded body mounting base 4 on which a cylindrical molded body 3 integrated with a mandrel 2 is mounted, and this cylindrical molded body. Cylinder molded body movement that is located at one end of the cylindrical molded body 3 placed on the body mounting table 4 and that restricts movement of the cylindrical molded body 3 when the mandrel 2 is pulled out from the cylindrical molded body 3. An initial peeling device 6 that communicates with the regulating device 5 and the mandrel 2 placed on the tubular molded body mounting table 4 to perform the initial peeling between the tubular molded body 3 and the mandrel 2, and the tubular molded body mounting table. Mandrel 2 placed on 4
In connection with the above, a pulling device 7 for pulling out the mandrel 2 from the tubular molded body 3 after the initial peeling, and a mandrel mounting table 8 for mounting the mandrel 2 after being pulled out from the tubular molded body 3 are provided.

As shown in FIG. 1, the above-mentioned cylindrical molded body 3 is formed by being adhered to the outer periphery of the mandrel 2 and molded.
It has a cylindrical shape.

Specifically, for example, it is a cylindrical body made of carbon fiber formed by filament winding, and is used as a raw material for a roll of a printing machine for which the inertial force is desired to be kept low.

The shape of the cylindrical molded body 3 may be a polygonal cylindrical body such as a triangle or a quadrangle other than the cylindrical body shown in FIG.

The mandrel 2 to which this cylindrical molded body 3 is adhered
As shown in FIGS. 1 and 2 and 3, is a cylindrical member, and a rotary shaft 9 for rotatably supporting the mandrel 2 is provided at the axial center of both ends in the length direction so as to project therefrom. There is.

When pulling out the mandrel 2 from the tubular molded body 3, as shown in FIGS. 2 and 3, a pull-out jig 10 is attached to the rotary shaft 9 on the pull-out side, and the initial peeling device 6 is attached to the pull-out jig 10. And the pulling device 7 is connected, and the mandrel 2
Initial peeling and withdrawal are performed.

As shown in FIG. 1, the above-mentioned cylindrical molded body mounting table 4 supports the cylindrical molded body 3 from below on a table 11 which is movable in the longitudinal direction of the mounted cylindrical molded body 3. In addition, a pair or a plurality of pairs of cylindrical molded body receiving rollers 12 rotatable in the longitudinal direction of the cylindrical molded body 3 are arranged in a V shape.

In the embodiment shown in FIG. 1, the tubular molded body mounting table 4 is divided into a plurality of parts. By thus dividing the tubular molded body mounting table 4 into a plurality of parts, the tubular molded body 3 can be reliably placed even when the lengths of the tubular molded bodies 3 to be mounted are different. Can be supported.

As shown in FIG. 1, FIG. 2 and FIG. 3, the above-mentioned tubular compact movement restricting device 5 has an inner peripheral diameter larger than the outer peripheral diameter of the mandrel 2, and It is composed of a ring-shaped member that comes into contact with the end surface.

As shown in FIG. 1, the cylindrical molded body movement restricting device 5 is attached to a pull-out support base 13 provided on one side of the cylindrical molded body mounting base 4. When the mandrel 2 is pulled out from the tubular molded body 3 by pressing one end of the tubular molded body 3 placed on the tubular molded body mounting table 4, the tubular molded body 3 is It is regulated to move in the drawing direction of 2. At this time, the mandrel 2 is pulled out from the tubular molded body 3 through the inside of the ring.

If a device for moving the cylindrical molded body movement restricting device 5 in the vertical direction is provided in the cylindrical molded body movement restricting device 5, the cylindrical molded body 3 and the mandrel 2 will have diameters corresponding to each other. It is possible to move the tubular molded body movement restricting device 5 to an appropriate height.

As shown in FIGS. 2 and 3, the initial peeling device 6 includes a rod 14 at the lower end of the tubular molded body movement restricting device 5.
A hydraulic cylinder 15 whose tip is fixed in the direction of pulling out the mandrel 2, an arm 16 rotatably supported by the tip of a rod 14 of the hydraulic cylinder 15 and rotating with the driving of the hydraulic cylinder 15, and a mandrel. 2 rotation axis 9
Provided on the pull-out jig 10 attached to the arm 16, the free end of the arm 16 comes into contact within the predetermined rotation range of the arm 16 to move the mandrel 2 in the pull-out direction, and the arm 16 rotates beyond the predetermined rotation range. Then, the contact member 17 for releasing the contact is provided.

Drive oil is supplied to the hydraulic cylinder 15 described above from a drive pump or the like (not shown), and the rod 14 can be expanded and contracted.

The arm 16 has one end rotatably attached to the tip of the rod 14 and is attached with the midpoint in the length direction as a rotation fulcrum. The rod 14 is extended at its free end. An abutting portion 18 that is curved inward is provided on the tip end side in the rotation direction when the contact is made.

The abutting member 17 is provided with a supporting piece 19 protruding from the lower surface of the drawing jig 10, and the supporting piece 19.
The abutting portion 1 of the arm 16 provided so as to project from one side surface of the arm 16.
And a contact protrusion 20 that abuts on 8.

To use this initial peeling device 6,
As shown in FIG.
When the hydraulic cylinder 15 is driven to contract the rod 14 after the abutting portion 18 of the arm 6 is abutted, the abutting portion 18 of the arm 16 is moved.
Pushes the contact protrusion 20 of the contact member 17 in the pulling direction of the mandrel 2.

Since the pull-out jig 10 provided with the abutting member 17 is connected to the rotating shaft 9 of the mandrel 2, a force in the pull-out direction is applied to the mandrel 2 and the cylindrical molded body 3 and the mandrel 2 are separated from each other. can do.

Then, as shown in FIG. 3, the hydraulic cylinder 15 is further driven to contract the rod 14 and the arm 16
When is rotated, the contact between the free end portion of the arm 16 and the contact member 17 is released, and the initial peeling ends.

The drawing device 7 described above is shown in FIGS.
As shown in, a winch 22 for winding the wire 21 attached to the tip of the drawing jig 10 is provided.

More specifically, the pulling device 7 is
As shown in FIG. 4, a winch 22, a guide device 23 for guiding the wire 21 to the winch 22, and a drawing jig 1
0 is in contact with the limit switch 24 for stopping the winding operation of the winch 22.

The guide device 23 is the wire 21.
Is provided from below, and the rotation roller 25 is rotatably supported by a bearing portion 27 mounted on a support base 26 so as to be able to move up and down.

A wire height adjusting device 28 is connected to the bearing portion 27. As shown in FIG. 4, the wire height adjusting device 28 includes a vertical support column 29 continuously provided on the upper portion of the bearing portion 27, and the support column 26 for supporting the support column 29.
A support portion 30 that supports the upper and lower parts of the support 29 so as to be able to move up and down, and a handle 31 for moving up and down the support column 29 are provided.

As shown in FIG. 4, the above-mentioned support column has a male screw portion on its outer peripheral surface. In addition, the support portion 30 described above
As shown in FIG. 4, a column has a column insertion hole 32 through which the column 29 is inserted.

The handle 31 has a female screw portion, which is screwed to a male screw portion provided on the outer peripheral surface of the support column 29, at substantially the center thereof, and is rotatably screwed to the support column 29. In addition, the support 29 and the bearing portion 27 of the roller 25 described above are
The support 29 and the bearing portion 27 of the roller 25, which are integrally connected, can move up and down along the support base 26.

Therefore, when the handle 31 is rotated, the support column 29 moves up and down, and the bearing portion 27 connected to the support column 29 is provided.
Can be raised and lowered. By moving the rotating roller 25 in the vertical direction in this manner, the height of the wire 21 can be adjusted.

By providing the wire height adjusting device 28, even if the diameter of the cylindrical molded body 3 is different, that is, even if the diameter of the mandrel 2 is different,
The wire 21 connected to the rotating shaft 9 can be wound in a substantially horizontal direction, and when the mandrel 2 is pulled out,
The mandrel 2 does not tilt.

The limit switch 24 is provided integrally with the bearing portion 27 of the rotary roller 25 on the mandrel 2 side of the rotary roller 25. Therefore, the wire height adjusting device 28 can move the limit switch 24 together with the rotating roller 25 in the vertical direction.

As shown in FIG. 4, a spindle-shaped limit switch drive member 33 is attached in the middle of the wire 21, and when the winch 22 is driven to wind up the wire 21, the limit switch drive member 33 causes the limit switch drive member 33 to rotate. The limit switch 24 is actuated by contacting with 24, and the hoisting operation of the winch 22 is stopped.

The mandrel mounting table 8 supports the mandrel 2 from below as shown in FIG.
A mounting table 35 in which a pair or a plurality of pairs of mandrel receiving rollers 34 that are rotatable in the length direction of the mandrel 2 are arranged in a V shape, a support table 36 that supports the mounting table 35 so as to be lifted, and a mounting table 35. An elevating device 37 for elevating the table 35 is provided.

The mounting table 35 is composed of substantially the same members as the cylindrical molded body mounting table 4 described above, and has a pair of V-shaped mandrel receiving rollers 3.
By placing the mandrel 2 between 4, 34, the mandrel 2 can be supported from below.

As shown in FIG. 5, the above-described lifting device 37 is provided so as to project downward from substantially the center of the lower surface of the mounting table 35, and its tip portion is supported by the support table 36.
Up and down support column 38 that can be inserted into
And a pair of auxiliary columns 39 that are provided so as to project downward from both sides of the elevating column 38 on the lower surface of the mounting table 35, the tip end of which can be inserted into the support table 36, and that have an internal thread portion on the outer peripheral surface. And a pair of lifting handles 40 that are attached to the lifting column 38 with the support table 36 interposed therebetween and that are screwed into female threads provided on the outer peripheral surface of the lifting column 38 to move the lifting column 38 in the vertical direction. There is.

Further, the mounting table 35 and the support table 3
A nut 41 is attached to the auxiliary strut 39 located between 6 and 6.

In order to adjust the height of the mandrel mounting table 8, a nut 41 attached to the auxiliary support column 39 is used as necessary.
And the pair of lifting handles 40 are rotated in the same direction to move the lifting column 38 in the vertical direction. Then, after adjusting the mandrel receiving roller 34 to a desired height, the elevating handle 40 is operated to move both elevating handles 4
The support table 36 is clamped from above and below by 0 and 40, and the nut 41 attached to the auxiliary support column 39 is attached.
By tightening toward the support table 36,
The height of the mounting table 35 can be adjusted with respect to the support table 36.

As described above, by providing the elevating device 37 on the mandrel mounting table 8, the mandrel mounting table 8 can be adjusted to an appropriate height in accordance with the diameter of the mandrel 2.

Next, a method for pulling out the mandrel 2 from the cylindrical molded body 3 which is formed by being attached to the outer periphery of the mandrel 2 by using the above-described decording device 1 will be described with reference to FIGS.

In order to pull out the mandrel 2 from the tubular molded body 3 formed by being attached to the outer periphery of the mandrel 2, as shown in FIG. 2, the tubular molded body 3 integrated with the mandrel 2 is tubularly molded. The cylindrical molded body movement restricting device 5 is placed on the body mounting table 4 and is positioned at one end of the cylindrical molded body 3.

At this time, the cylindrical molded body 3 and the mandrel 2 are
The vertical position of the cylindrical molded body movement restricting device 5 is adjusted and the height of the mandrel mounting table 8 is adjusted according to the diameter of the.

The rotary shaft 9 on the pull-out side of the mandrel 2
Attach the extraction jig 10 connected to the wire 21 to
The contact protrusion 20 of the contact member 17 is attached to the contact portion 18 of the arm 16.
Abut.

Next, when the hydraulic cylinder 15 is driven and the rod 14 is contracted, the arm 16 rotates about the rotation fulcrum about which the arm 16 is stopped, and the abutting portion 18 of the arm 16 moves into contact with the abutting member 17.
Push the contact protrusion 20 of the in the direction of pulling out the mandrel 2,
The initial peeling between the cylindrical molded body 3 and the mandrel 2 is performed.

At this time, the winch 22 of the pulling device 7 is driven to wind the wire 21 so that the wire 21 is not bent.

Then, as shown in FIG. 3, when the hydraulic cylinder 15 is driven to further retract the rod 14, the arm 1
6 further rotates, the free end of the arm 16 and the abutment member 1
The contact with 7 is released.

When the initial peeling between the tubular molded body 3 and the mandrel 2 is completed, the winch 22 of the pulling device 7 is further driven to wind up the wire 21, and the mandrel 2 is pulled out from the tubular molded body 3. The mandrel 2 after being pulled out is mounted on the mandrel mounting table 8 and collected.

[0069]

Since the present invention has the above-described structure,
The following effects can be obtained.

According to the first or fourth aspect of the present invention, when the mandrel is pulled out from the tubular molded body adhered to the outer periphery of the mandrel and molded, the mandrel is used at the time of initial peeling which requires a large pulling force. The apparatus and the apparatus used at the time of subsequent drawing are separately provided, and the initial peeling operation and the subsequent drawing operation are performed by separate apparatuses.

Therefore, it is possible to provide a decentering device and a decentering method for a cylindrical molded body, which can obtain a sufficient drawing force in the initial peeling and can reduce the equipment cost.

According to the second aspect of the invention, the initial peeling device is provided with the hydraulic cylinder capable of exerting a large pulling force, while the pulling device is provided with the winch capable of obtaining a large driving stroke.

Therefore, a hydraulic cylinder capable of exerting a large pulling force is used at the time of initial separation between the cylindrical molded body and the mandrel, and a winch having a large driving stroke is used at the time of pulling out the mandrel thereafter. , Even for a long cylindrical molded body, without using large-scale and expensive equipment, it is possible to pull out the mandrel from the cylindrical molded body adhered to the outer periphery of the mandrel A core removing device can be provided.

According to the third or fifth aspect of the invention, by driving the hydraulic cylinder, the tubular molded body and the mandrel are initially separated, and when the hydraulic cylinder exceeds a predetermined drive range, The initial peeling operation has been completed.

Therefore, since the initial peeling operation by the initial peeling device can be automatically ended, the cylindrical molded body decentering apparatus and the demolding method capable of decoreing the cylindrical molded body more easily. Can be provided.

[Brief description of drawings]

FIG. 1 is a side view of a core removing device.

FIG. 2 is a schematic configuration diagram of a core removing device for explaining an initial peeling operation during core removal of a tubular molded body.

FIG. 3 is a schematic configuration diagram of a core removing device for explaining a pulling-out operation during core removal of a tubular molded body.

FIG. 4 is a side view of the drawing device.

FIG. 5 is a front view of a mandrel mounting table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decoreing device 2 Mandrel 3 Cylindrical molded body 4 Cylindrical molded body mounting table 5 Cylindrical molded body movement control device 6 Initial peeling device 7 Extraction device 8 Mandrel mounting table 9 Rotating shaft 10 Extraction jig 11 Table 12 Cylindrical molded body Receiving roller 13 Pull-out support base 14 Rod 15 Hydraulic cylinder 16 Arm 17 Contact member 18 Contact part 19 Support piece 20 Contact protrusion 21 Wire 22 Winch 23 Guide device 24 Limit switch 25 Rotating roller 26 Support base 27 Bearing part 28 Wire height Adjusting device 29 Strut 30 Supporting part 31 Movement restricting member 32 Strut insertion hole 33 Limit switch driving member 34 Mandrel receiving roller 35 Mounting table 36 Supporting table 37 Lifting device 38 Lifting strut 39 Auxiliary strut 40 Lifting handle 41 Nut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiromine Iwamori 46-59 Nakahara, Tobata-ku, Kitakyushu City, Fukuoka Prefecture, Japan Machinery & Plant Division, Nippon Steel Corporation (72) Shinichi Morita Tobata, Kitakyushu City, Fukuoka Prefecture 59 Nittetsu Plant Design Co., Ltd., 46 Nakahara, Oji, Tokyo

Claims (5)

[Claims] 1. A demolding device for a cylindrical molded body for pulling out the mandrel from a cylindrical molded body adhered to the outer periphery of a mandrel and mounting the cylindrical molded body integrated with the mandrel. The tubular molded body mounting base and the tubular molded body mounted on the cylindrical molded body mounting base are located at one end of the cylindrical molded body, and when the mandrel is pulled out from the cylindrical molded body, the movement of the cylindrical molded body is prevented. A cylindrical molded body movement restricting device for controlling, an initial peeling device that communicates with the mandrel placed on the cylindrical molded body support table to perform an initial peeling between the cylindrical molded body and the mandrel, and the cylindrical molding A pulling device that communicates with the mandrel placed on the body support table and pulls out the mandrel from the cylindrical molded body after initial peeling, and a mandrel mounting table that mounts the mandrel after being pulled out from the cylindrical molded body. Decentering equipment for cylindrical molded articles characterized by Place. 2. The initial peeling device includes a hydraulic cylinder connected to one end of the mandrel on the pulling side, and the drawing device includes a winch connected to one end of the mandrel on the pulling side. 1. A demolding device for a tubular molded body according to 1. 3. An initial peeling device is provided on a hydraulic cylinder, an arm rotatably fixed to a rod tip end of the hydraulic cylinder, the arm rotating with the driving of the hydraulic cylinder, and one end of a mandrel pulling side. The free end portion of the arm comes into contact with the arm within a predetermined rotation range to move the mandrel in the pull-out direction, and
The demolding device for a tubular molded body according to claim 2, further comprising: a contact member that is released from contact with the arm when the arm rotates beyond the predetermined rotation range. 4. A method of decentering a tubular molded body for pulling out a mandrel from a tubular molded body adhered to a mandrel outer periphery, the method comprising: The first step of mounting on the molded body mounting table, and the cylindrical molded body movement restricting device for restricting the movement of the cylindrical molded body is located at one end of the cylindrical molded body, and is pulled out from the mandrel. Second step of performing initial peeling between the cylindrical molded body and the mandrel by applying the force of the above, and the cylindrical molded body while applying a force in the pulling direction to the mandrel which is smaller than that in the second step. And a third step of placing the mandrel on the mandrel placing table and pulling out the mandrel from the die. 5. In the second step of performing the initial separation between the cylindrical molded body and the mandrel, the free end of the rotary arm rotatably attached to the rod tip of the hydraulic cylinder is connected to the one end of the mandrel withdrawal side. The hydraulic cylinder is driven to rotate the arm, and a force in the pulling direction of the mandrel is applied to the abutting member that abuts the free end of the arm. The initial peeling is performed between the molded body and the mandrel, and when the arm rotates beyond a predetermined rotation range, the contact between the free end portion of the arm and the abutting member is released to complete the initial peeling. The method for decoreing a tubular molded body according to claim 4.