JP2012187870A - Continuous vulcanization facility, and continuous vulcanization method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous vulcanization facility which prevents occurrence of trouble caused by slack of an unvulcanized rubber tube upon starting continuous vulcanization and can smoothly start the continuous vulcanization.SOLUTION: A head 30 of an extruder and a vulcanization tube 32 are separately arranged in the continuous vulcanization facility 22. A connecting device 34 is arranged to the vulcanization tube 32, wherein the connecting device includes a cylinder part 62 formed on a tip side of the vulcanization tube, a slide cylinder 68 which is slidably and internally fitted to the cylinder part 62 through a seal member 64, and a connection part 72 which is arranged on a tip side of the slide cylinder 68 and is connected to the head 30 tightly, and telescopically moves to connect and release the connection between the vulcanization tube 32 and the head 30 of the extruder.

Description

  The present invention relates to a rubber tube continuous vulcanization facility and a continuous vulcanization method.

  Conventionally, as a rubber tube vulcanization facility, an unvulcanized rubber tube extruded from the head of an extruder is continuously passed through the inside of the vulcanized tube, and the inside of the vulcanized tube is pressurized with a medium such as steam. Continuous vulcanization equipment that heats and continuously vulcanizes is known.

  Conventionally, in this type of continuous vulcanization equipment, the head of the extruder and the vulcanized pipe are directly connected, and the unvulcanized rubber pipe from the head of the extruder is continuously fed into the vulcanized pipe as it is. It is.

  By the way, in this type of continuous vulcanization equipment, at the start of continuous vulcanization, one of the extruder and the vulcanizing pipe, usually the side of the extruder is moved backward from the vulcanizing pipe, and the head of the extruder and the vulcanizing pipe are vulcanized. A required space is formed between the pipe and the dummy rubber pipe that has been passed through the vulcanized pipe in advance, and each end of the unvulcanized rubber pipe that has exited from the extruder is jointed in that space, and then moved backward. Thus, the extruder once pulled away from the vulcanizing tube is moved forward, the head of the extruder and the vulcanizing tube are reconnected, and continuous vulcanization is performed.

FIG. 9 schematically illustrates this.
FIG. 9 (I) shows a direct connection state between the head 200 of the extruder and the vulcanizing pipe 202. From this state, the extruder is moved backward as shown in FIG. A space S is formed between the vulcanizing pipe 202 and a dummy rubber pipe 204 previously passed through the vulcanizing pipe 202 as shown in (III) and a rubber pipe 206 exiting from the head 200 of the extruder. Then, the joint jig 208 is jointed in the space S, and then the extruder is moved forward to again connect the head 200 and the vulcanized pipe 202 as shown in FIG. 9 (I). The pipe 204 is started to be taken out, and the rubber pipe is continuously extruded and vulcanized.

However, in this case, when the head 200 is moved forward toward the vulcanizing pipe 202, the portions of the dummy rubber pipe 204 and the rubber pipe 206 located in the space S are slack as shown in FIG. 9 (IV). It will occur.
This sagging portion is sent directly to the inside of the vulcanizing pipe 202, and this sagging causes the unvulcanized rubber pipe 206 to rub against the pipe wall inside the vulcanizing pipe 202, causing trouble.

Specifically, the unvulcanized rubber tube 206 rubs against the tube wall, causing rubber breakage, or the slackened rubber tube 206 is clogged inside the vulcanized tube 202 or at the outlet portion.
Then, continuous vulcanization of the rubber tube 206 cannot be started up successfully.

  The following Patent Document 1, Patent Document 2, and Patent Document 3 disclose equipment for continuously vulcanizing rubber pipes using vulcanized pipes, but those disclosed in these patent documents solve the above problems. Can not do it.

JP 2006-187879 A Japanese Patent Publication No. 3-74885 JP 2009-241490 A

  The present invention is based on the above circumstances, and prevents the occurrence of troubles caused by sagging of unvulcanized rubber pipes at the start of continuous vulcanization, and smoothly starts up continuous vulcanization. The present invention has been made for the purpose of providing a continuous vulcanization facility and a continuous vulcanization method.

  Thus, claim 1 relates to a continuous vulcanization facility, which has a vulcanization tube hermetically connected to the head of the extruder, and a rubber tube extruded from the head of the extruder is disposed inside the vulcanization tube. A continuous vulcanization facility for continuously passing and continuously vulcanizing by heating under pressure inside the vulcanized tube, wherein the head of the extruder and the vulcanized tube are connected to the vulcanized tube. The vulcanizing pipe is provided with (a) a cylinder part formed on the tip side of the vulcanizing pipe, and (b) the cylinder part via a seal member. A slide cylinder that is slidably fitted in the axial direction of the vulcanization pipe, protrudes toward the head of the extruder, and moves away from the head into the cylinder portion; (c) the slide cylinder A connecting portion that is connected to the head in close contact with the head, and expands and contracts in the axial direction of the vulcanized pipe , Characterized in that a connecting and releasable coupling device and a head of the pressurized 硫管 said extruder.

  According to a second aspect of the present invention, in the first aspect, the slide cylinder has a cylindrical piston portion on the rear end side and a cylindrical shape that extends from the piston portion to the head side and has a smaller diameter than the piston portion. And a rod portion.

  According to a third aspect of the present invention, in the second aspect, the cylinder portion includes a rod fitting portion that is fitted to the outer surface of the rod portion so as to be slidable relative to the distal end side. A seal member for sealing between the outer surface of the rod portion and / or a seal member for sealing between the inner surface of the cylinder portion and the piston portion is provided on the piston portion.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the cylinder portion is provided with a small diameter portion partially having a small diameter at a tip side and a rear position of the rod fitting portion. The piston portion is fitted in contact with the inner surface of the small-diameter portion at the protruding end of the rod portion, and the piston portion is moved with respect to the cylinder portion under a state where the rod portion is moved in the retracting direction from the protruding end. It is characterized by being loosely fitted.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the cylinder portion has an inner diameter larger than that of the main body portion of the vulcanized pipe.

  Claim 6 relates to a continuous vulcanization method, wherein a rubber tube extruded from the head of an extruder is continuously passed through the inside of the vulcanization tube and heated under pressure inside the vulcanization tube to continuously When vulcanizing in general, the vulcanized pipe includes: (a) a cylinder part configured on the tip side of the vulcanized pipe; and (b) the vulcanized pipe connected to the cylinder part via a seal member. A sliding cylinder that is slidably fitted in the axial direction, protrudes toward the head side of the extruder, and moves away from the head and moves into the cylinder portion; and (c) on the distal end side of the sliding cylinder. A connecting portion provided in close contact with the head, wherein the connecting portion is capable of extending and contracting in the axial direction of the vulcanizing pipe and connecting and releasing the vulcanizing pipe and the head of the extruder. An apparatus is provided, and at the start of continuous vulcanization of the rubber tube, the rod portion is retracted to A space is formed between the connection portion of the apparatus and the head of the extruder, and a dummy rubber pipe previously passed through the vulcanizing pipe and each end of the rubber pipe protruding from the head of the extruder are jointed by the space. Thereafter, the rod portion is protruded to bring the vulcanized pipe and the extruder head into a connected state by the connecting device, and the dummy rubber pipe is started to be taken by the take-up machine, and the rubber pipe is continuously extruded and added. It is characterized by performing sulfur.

Effects and effects of the invention

  As described above, the continuous vulcanization equipment of the present invention is arranged such that the head of the extruder and the vulcanization pipe are spaced apart in the axial direction of the vulcanization pipe, and the connecting device having the following configuration on the vulcanization pipe, A cylinder part configured on the tip side of the vulcanizing pipe, and a cylinder part that is slidably fitted in the axial direction of the vulcanizing pipe via a seal member, and protrudes from the head of the extruder and from the head A slide cylinder that moves apart and moves into the cylinder part, and a connecting part that is provided on the tip side of the slide cylinder and is in close contact with the head of the extruder, and expands and contracts in the axial direction of the vulcanization pipe A connecting device that moves and connects and disconnects the vulcanizing pipe and the head of the extruder is provided.

In the continuous vulcanization equipment of the present invention, both the extruder and the vulcanization pipe are fixed in position, that is, by simply contracting the connecting device without moving them, the head of the extruder and the connecting device A required space can be formed between the connecting portions.
In that space, the dummy rubber tube previously passed through the vulcanized tube and the unvulcanized rubber tube from the extruder are jointed, and then the connecting device is extended to connect the connecting portion of the connecting device to the head of the extruder. By connecting to, the head of an extruder and a vulcanization pipe can be made into a connection state via this connection device.

Therefore, according to the continuous vulcanization equipment of the present invention, the portion of the dummy rubber tube and the rubber tube from the extruder that was located in the space is slackened by connecting the head of the extruder and the vulcanization tube. Therefore, when the rubber tube from the dummy rubber pipe and the extruder located in the above space is drawn into the vulcanizing pipe, the vulcanization is started. The slack part of the unvulcanized rubber tube rubs against the tube wall of the vulcanized pipe to cause the rubber to break, or the rubber pipe sags inside the vulcanized pipe or at the outlet of the vulcanized pipe It is possible to prevent the portion from becoming clogged and causing trouble.
Therefore, the continuous vulcanization equipment of the present invention can start up the continuous vulcanization satisfactorily.

  In the continuous vulcanization equipment of the present invention, the above-mentioned slide cylinder is made up of a cylindrical piston portion on the rear end side, and a cylindrical rod that has a smaller diameter than the piston portion and extends from the piston portion to the head side of the extruder. (Claim 2).

  In this case, the cylinder portion is provided with a rod fitting portion that fits on the distal end side so as to be slidable relative to the outer surface of the rod portion, and the rod fitting portion is sealed between the outer surface of the rod portion. A sealing member that seals between the inner surface of the cylinder portion in the piston portion, or these sealing members can be provided in both the rod fitting portion and the piston portion. Item 3).

  In this way, it is possible to satisfactorily prevent the pressurized medium in the vulcanization pipe, for example, steam normally used as the pressurized heating medium, from leaking outside through the cylinder portion and the slide cylinder in the coupling device. it can.

  In the continuous vulcanization facility of the present invention, a small diameter portion having a small diameter is provided on the tip side of the cylinder portion and at the rear side position of the rod fitting portion, and the piston portion is provided at the protruding end of the rod portion. The lower piston portion can be fitted into the cylinder portion in a state of contact with the inner surface of the small-diameter portion, and the rod portion protrudes and moves from the end in the retracting direction. 4).

  In this way, when connecting and releasing the connection between the extruder head and the vulcanizing pipe by the connecting device, in particular, when the connecting device expands and contracts, a large resistance is caused by the sliding of the piston portion with respect to the inner surface of the cylinder portion. Generation | occurence | production can be prevented and the expansion-contraction operation | movement of a connection apparatus can be performed smoothly with a small force.

  In the continuous vulcanization facility of the present invention, the inner diameter of the cylinder portion can be made larger than that of the main body portion of the vulcanization pipe.

  Next, claim 6 relates to a continuous method. In this continuous vulcanization method, a connecting device is provided at the front end side of the vulcanized pipe, and the rod portion is retracted and connected at the start of continuous vulcanization of the rubber pipe. A space is formed between the connecting part of the apparatus and the head of the extruder, and each end of the unvulcanized rubber pipe from the head of the extruder and the dummy rubber pipe previously passed through the vulcanized pipe in the space are jointed. After that, the rod part of the connecting device is protruded to bring the vulcanizing tube and the head of the extruder into a connected state by the connecting device, and the dummy rubber tube is started to be taken out by the take-up machine, and the rubber tube is continuously extruded and vulcanized. Execute.

  According to this manufacturing method, an unvulcanized rubber pipe that has produced slack is sent to the inside of the vulcanized pipe, where the rubber pipe is broken due to contact with the pipe wall of the vulcanized pipe, or the slack portion is blocked. Can be avoided well, and the continuous vulcanization can be started up satisfactorily.

It is the figure which showed the rubber-coated hose which is an example of the application object of this invention. It is the figure which showed the whole structure of the manufacturing equipment of the hose shown in FIG. It is the figure which showed the state which connected the head of the extruder in FIG. 1, and the vulcanization tube with the connection apparatus in the external appearance state. It is the figure which showed the cross section of the part shown in FIG. FIG. 5 is a sectional view taken along line VV in FIG. 3. It is the figure which showed the head of the extruder and vulcanization pipe in FIG. 4 in the connection cancellation | release state. It is the figure which showed the water sealing apparatus of the exit part of the vulcanization pipe shown in FIG. It is the figure which showed the effect | action of the connection apparatus in this embodiment with the work procedure at the time of a continuous vulcanization start. It is the figure which showed the comparative example of the work procedure at the time of a continuous vulcanization start as a background figure of this invention.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, reference numeral 10 denotes a rubber-coated hose (hereinafter simply referred to as a hose) to which the present embodiment is applied, and includes a resin tube 12 and a tubular coated rubber (rubber tube) 14 that covers the outer surface of the resin tube 12. .
Here, the covering rubber 14 has a function as a protector for protecting the resin tube 12, and is not bonded to the resin tube 12 but merely covers the resin tube 12.
However, the covering rubber 14 covers the resin tube 12 over the entire length.
In this embodiment, the resin tube 12 is made of a resin such as polyamide (PA12).
The covering rubber 14 is here made of EPDM rubber.

In this embodiment, the hose 10 has an inner diameter d ₁ of φ6 mm and an outer diameter d ₂ of φ11.2 mm.
Although this embodiment is used as a fuel transport hose, the present invention is applicable to rubber-coated hoses of other uses, forms, and sizes in general.
In FIG. 2, reference numeral 16 denotes a manufacturing facility for the hose 10.
The production facility 16 includes a tray 17, a feeding machine 18, a coated rubber extruder 20, a pressurized continuous vulcanization facility 22, a water tank 24, a take-up machine 26, and a tray 28. .

In this manufacturing equipment 16, the resin tube 12 wound on the tray 17 is continuously fed to the extruder 20 by the feeding machine 18 and passed through the head 30, and the rubber material is pushed out from the head 30, so that the resin tube 12. The coated rubber 14 is continuously extruded on the outer surface of the substrate.
Then, after that, the unvulcanized hose 10 is passed through a pressure type continuous vulcanization facility 22 where continuous vulcanization is performed.

Here, in the continuous vulcanization facility 22, the hose 10 is pressurized and heated using steam supplied into the interior of a vulcanization pipe 32 described later as a medium. As the medium, air other than steam or nitrogen gas may be used.
The hose 10 inside the vulcanizing tube 32 passes through the inside of the vulcanizing tube 32 by the take-up action by the take-up machine 26, and is immersed in the water tank 24 when it exits the vulcanizing tube 32, and then wound on the tray 28. go.

In FIG. 2, reference numeral 32 denotes a long vulcanizing pipe, and 34 denotes a connecting device that connects and disconnects the vulcanizing pipe 32 and the head 30 of the extruder 20. Details of the coupling device 34 will be described later.
Reference numeral 36 denotes an outlet portion of the vulcanizing pipe 32, and the outlet portion 36 is sealed with a water sealing device 38 shown in FIG.
In this water sealing device 38, the water in the water tank 24 is supplied into the vulcanization pipe 32 through the delivery path 42 at a predetermined discharge pressure by the pump 40. On the other hand, excess water is returned to the water tank 24 through the return path 44, and water leaked from the outlet portion 36 is returned to the water tank 24.

46 is a cylindrical part which comprises the exit part 36, 48 is a passage of the hose 10 formed in the inside.
Reference numeral 50 denotes a ring-shaped seal member arranged along the passage 48, and 52 denotes a ring-like backup ring that backs up the seal member 50 from the rear side.
Here, for example, soft and sponge-like silicon rubber is used for the seal member 50.
On the other hand, the backup ring 52 is hard with respect to the seal member 50 and does not substantially deform. Here, for example, a fluororesin is used as the backup ring 52.

A plug 54 is fitted to the opening at the tip of the cylindrical portion 46 and is screwed into the cylindrical portion 46.
The sealing member 50 and the backup ring 52 are supported from below by the plug body 54.
Reference numeral 56 denotes a spacer ring. By changing the height of the spacer ring 56, the axial tightening force on the seal member 50 can be adjusted.
Here, the sealing member 50 is pressed by the internal pressure of the vulcanizing pipe 32, the inner peripheral portion is brought into contact with the hose 10 passing through the outlet portion 36, and the outer peripheral portion is brought into contact with the tubular portion 46 to perform a sealing action. Do.

  In addition, the seal | sticker of the entrance side of the hose 10 to the continuous vulcanization | cure equipment 22, specifically, the seal | sticker between the head 30 of the said extruder 20, and the connection apparatus 34, as shown in FIG. The rubber material that covers the resin tube 12 through the die hole 60, that is, the covering rubber 14 itself, is used.

The configuration of the connecting device 34 is specifically shown in FIGS.
As shown in FIG. 4, the connecting device 34 includes a cylinder portion 62 configured on the distal end side of the vulcanizing pipe 32, and the cylinder portion 62 via seal members 64 and 66 of FIG. A slidable cylinder 68 that is slidably fitted in the axial direction of the vulcanizing tube 32, protrudes toward the head 30 side of the extruder 20, and moves away from the head 30 into the cylinder portion 62. And a connecting portion 72 that is provided on the distal end side of the slide cylinder 68 and is pressed against the plate 70 on the head 30 side and connected to the head 30 in an airtight manner.
The connecting device 34 expands and contracts in the axial direction of the vulcanizing tube 32 to connect and disconnect the vulcanizing tube 32 and the head 30 of the extruder 20.

  The slide cylinder 68 has a cylindrical piston portion 74 on the rear end side, and a cylindrical rod portion 76 having a diameter smaller than that of the piston portion 74 and extending integrally from the piston portion 74 to the head 30 side. A seal member 64 made of the O-ring is held on the outer surface of the piston portion 74, and the piston portion 74 is partially thick on the tip side of the cylinder portion 62 via the seal member 64. The inner diameter of the small-diameter portion 78 having a small inner diameter is hermetically contact-fitted.

On the other hand, the cylinder portion 62 has a cylindrical portion 80 that is configured at a part of the distal end side of the vulcanizing tube 32 and has a larger diameter than the main body portion 32 a of the vulcanizing tube 32. The small-diameter portion 78 is formed at the tip portion.
A rod fitting portion 82, which is in a block shape and is fitted to the outer surface of the rod portion 76 of the slide cylinder 68 so as to be relatively slidable, is fixed to the cylinder portion 80. Is provided.
And the sealing members 64 and 66 which consist of said O-ring are hold | maintained at the inner surface side of this rod fitting part 82, and this rod fitting part 82 is made to fit airtight with respect to the rod part 76. FIG. .

  Note that the sealing member 64 of the piston portion 74 and the sealing member 64 of the rod fitting portion 82 are both a pressurized heating medium supplied to the inside of the vulcanizing tube 32, here, steam is the cylinder portion 62 and the slide cylinder 68. The seal member 66 is a dust seal that prevents dust from entering from the outside.

Here, one of the seal member 64 on the piston portion 74 side and the seal member 64 on the rod fitting portion 82 side may be omitted depending on circumstances.
It should be noted that the cylinder portion 80 of the cylinder portion 62 in the coupling device 34 is not a part of the vulcanizing pipe 32 but may be considered to be provided separately from the vulcanizing pipe 32 and integrally with the vulcanizing pipe 32. it can.

As shown in FIG. 5, the block-like connecting portion 72 has a quadrangular front view shape, and the connecting portion 72 is supported by the support structure shown in FIGS. Yes.
In these drawings, reference numeral 84 denotes a support frame having a pair of plate-like support legs 86 and a plate-like connecting portion 88 for connecting the upper ends of the support legs 86, and the connecting portion 72 is shown by this support frame 84. 3 and 4 are supported so as to be slidable in the left-right direction, that is, in the axial direction of the vulcanizing tube 32.

3 and 5, reference numeral 90 denotes an LM guide provided across the connecting portion 72 and the support frame 84. The LM block 92 provided on the support frame 84 side and the left and right sides in FIG. It has a guide rail (LM rail) 94 which is provided in a form extending in the direction and fitted to the LM block 92.
Here, the connecting portion 32 is manually moved forward and backward by a handle operation under the movement guide by the LM guide 90. However, it can also be moved forward and backward by a drive device such as an electric motor.

In this embodiment, the connecting device 34 can be expanded and contracted. By extending the connecting device 34, the head 30 of the extruder 20 and the vulcanized pipe 32 are connected in an airtight manner via the connecting device 34. be able to.
Further, the head 30 and the vulcanizing tube 32 can be disconnected by contracting the one connecting device 34.
Specifically, the head 30 and the vulcanized pipe 32 are connected by pushing the connecting portion 72 toward the head 30 side of the extruder 20 and projecting the slide cylinder 68 leftward in FIG. Can do.

  On the other hand, by pulling the slide cylinder 68 into the cylinder portion 62 in the right direction in the figure, the head 30 and the vulcanizing pipe 32 are disconnected from each other as shown in FIG. A space S shown in FIG. 6 can be formed between the plate 70) and the connection portion 72 of the coupling device 34.

  At this time, as shown in FIG. 6, the piston portion 74 of the slide cylinder 68 is separated from the small diameter portion 78 of the cylinder portion 62 in the right direction in the figure, and more specifically, the cylinder portion 80 is separated from the cylinder portion 62. It will be in a loosely fitted state.

FIG. 8 shows the operation of the coupling device 34 together with the work procedure at the start of continuous vulcanization.
FIG. 8 (I) shows a state in which the head 30 of the extruder 20 and the vulcanizing pipe 32 are connected by the connecting device 34. At this time, the slide cylinder 68 is positioned at the protruding end toward the head 30 side. The piston portion 74 of the slide cylinder 68 is in an airtightly fitted state with the small diameter portion 78 of the cylinder portion 62.

FIG. 8 (II) shows a state in which the slide cylinder 68 is retracted to the right in the drawing, and the head 30 and the vulcanizing pipe 32 are disconnected. At this time, the piston portion 74 is retracted of the slide cylinder 68. Immediately after the start of the operation, the cylinder portion 62, specifically, the cylinder portion 80 constituting the main body, is loosely fitted, and moves backward in the right direction in the figure while maintaining this loosely fitted state.
When the slide cylinder 68 reaches the retracted end, that is, the retracting end, a space S shown in FIG. 6 is formed between the plate 70 on the head 30 side and the connecting portion 72 of the connecting device 34.

In this embodiment, with the space S thus formed, the dummy rubber tube 96 that has been passed through the vulcanizing tube 32 in advance as shown in FIG. 8 (III) and the head 30 of the extruder 20 are ejected. The resin tube 12 of the hose 10 is joined by a joint jig 98. That is, the dummy rubber tube 96 and the unvulcanized covering rubber (rubber tube) 14 are jointed via the resin tube 12.
Here, each of the dummy rubber tube 96 and the resin tube 12 is inserted into the insertion hole of the joint jig 98, and they are joined.

As described above, when the dummy rubber tube 96 and the hose 10, that is, the unvulcanized covering rubber 14 are jointed, as shown in FIG. 8 (IV), the slide cylinder 68 protrudes in the left direction in the figure and is connected. The part 72 is connected to the head 30 side of the extruder 20, and the head 30 and the vulcanized pipe 32 are connected via the connecting device 34.
In this state, the operation of the take-out machine 26 and the feeding machine 18 of FIG. 2 is started, the covering rubber 14 is continuously extruded from the extruder 20, and the unvulcanized hose 10 extruded from the head 30 is vulcanized. The coating rubber 14 is continuously vulcanized there.

In the continuous vulcanization equipment 22 of the present embodiment as described above, both the extruder 20 and the vulcanization pipe 32 remain fixed, that is, the connecting device 34 is simply contracted without moving them. A required space S can be formed between the head 30 of the extruder 20 and the connection portion 72 of the coupling device 34.
In the space S, the dummy rubber tube 96 that has been passed through the vulcanized tube 32 in advance and the unvulcanized coating rubber 14 from the extruder 20 are jointed, and then the connecting device 34 is extended to operate the connecting device 34. By connecting the connecting portion 72 to the head 30 of the extruder 20, the head 30 of the extruder 20 and the vulcanized pipe 32 can be connected via the connecting device 34.

Therefore, according to the continuous vulcanization facility 22 of the present embodiment, the dummy rubber tube 96 and the portion of the covering rubber 14 from the extruder 20 that are located in the space S are the head 30 and the vulcanization tube 32 of the extruder 20. Is not caused to sag, and therefore, the take-up machine 26 starts taking it as it is, and the dummy rubber tube 96 located in the space S and the coated rubber 14 from the extruder 20 are started. When the rubber is drawn into the vulcanizing tube 32, the slack portion of the unvulcanized covering rubber 14 rubs against the tube wall of the vulcanizing tube 32 in the vulcanizing tube 32, or the rubber is broken. It is possible to prevent the slack portion of the covering rubber 14 from clogging at the inside of the vulcanizing tube 32 or the outlet portion 36 of the vulcanizing tube 32 and causing trouble.
Therefore, the continuous vulcanization equipment 22 of the present embodiment can successfully start up the continuous vulcanization.

In the continuous vulcanization equipment 22 of the present embodiment, a small diameter portion 78 having a small diameter is provided at the tip side of the cylinder portion 62 and at the rear side position of the rod fitting portion 82. The piston portion 74 is fitted in contact with the inner surface of the small diameter portion 78 at the protruding end, and the piston portion 74 is loosely fitted to the cylinder portion 62 when the rod portion 76 protrudes and moves in the retracting direction from the end. Therefore, the piston portion with respect to the inner surface of the cylinder portion 62 during the operation of connecting and releasing the connection between the head 30 of the extruder 20 and the vulcanizing pipe 32 by the connecting device 34, specifically, during the expansion and contraction operation of the connecting device 34. It is possible to prevent a large resistance from being generated due to the sliding of 74, and the expansion / contraction operation of the connecting device 34 can be smoothly performed with a small force.
In particular, when the vulcanization is lowered after continuous vulcanization, the connecting device 34 can be smoothly contracted even under a state where the sliding resistance by the seal member 64 is increased due to thermal expansion.

Although the embodiment of the present invention has been described in detail above, this is merely an example.
For example, although said embodiment is an example in the case of continuously vulcanizing the hose which has the resin tube 12 and the covering rubber 14 which covers the outer surface, this invention is in the state which coat | covers the outer surface of the resin mandrel as a core. The present invention can also be applied to a case where a rubber tube is extruded from an extruder and continuously vulcanized.
In addition, the present invention can be implemented in variously modified forms, for example, the cylinder portion 62 and the slide cylinder 68 can be configured in a form different from the above form, and the like, without departing from the spirit of the present invention. is there.

10 Rubber covered hose 14 Covered rubber (rubber tube)
DESCRIPTION OF SYMBOLS 20 Extruder 22 Continuous vulcanization equipment 26 Take-up machine 30 Head 32 Vulcanization pipe 32a Main body part 34 Connecting device 62 Cylinder part 64,66 Seal member 68 Slide cylinder 72 Connection part 74 Piston part 76 Rod part 78 Small diameter part 82 Rod fitting Part 96 dummy rubber tube

Claims (6)

A vulcanizing tube hermetically connected to the head of the extruder is provided, and the rubber tube extruded from the head of the extruder is continuously passed through the vulcanizing tube and vulcanized inside the vulcanizing tube. A continuous vulcanization facility that heats under pressure and continuously vulcanizes,
The head of the extruder and the vulcanization pipe are arranged apart from each other in the axial direction of the vulcanization pipe,
(a) a cylinder portion configured on the front end side of the vulcanization tube, and (b) an internal fit to the cylinder portion so as to be slidable in the axial direction of the vulcanization tube via a seal member, And a slide cylinder that moves away from the head and retracts into the cylinder portion, and (c) a connecting portion that is provided on the distal end side of the slide cylinder and is connected to the head in a close contact state. A continuous vulcanization facility comprising a connecting device capable of extending and contracting in an axial direction of the vulcanizing pipe and connecting and releasing the vulcanizing pipe and the head of the extruder.   2. The slide cylinder according to claim 1, further comprising: a cylindrical piston portion on a rear end side; and a cylindrical rod portion that extends from the piston portion toward the head and has a smaller diameter than the piston portion. A continuous vulcanization facility.   In Claim 2, the said cylinder part is provided with the rod fitting part fitted to the front end side so that relative sliding with respect to the outer surface of the said rod part is carried out, The outer surface of this rod part is equipped with this rod fitting part. A continuous vulcanization facility characterized in that a seal member for sealing between the cylinder portions is provided and / or a seal member for sealing between the inner surface of the cylinder portion and the piston portion.   In any one of Claims 1-3, the said cylinder part is provided with the small diameter part which makes a small diameter partially in the front end side and the back position of the said rod fitting part, In the protruding end of the said rod part, The piston portion is fitted in contact with the inner surface of the small diameter portion, and the piston portion is loosely fitted to the cylinder portion with the rod portion moved in the retracting direction from the protruding end. There is a continuous vulcanization facility.   5. The continuous vulcanization equipment according to claim 1, wherein the cylinder portion has an inner diameter larger than that of the main body portion of the vulcanization pipe. When the rubber tube extruded from the head of the extruder is continuously passed through the inside of the vulcanizing tube and heated under pressure inside the vulcanizing tube to continuously vulcanize,
In the vulcanized pipe,
(a) a cylinder portion configured on the front end side of the vulcanization tube, and (b) an internal fit to the cylinder portion so as to be slidable in the axial direction of the vulcanization tube via a seal member, And a slide cylinder that moves away from the head and retracts into the cylinder part, and (c) a connection part that is provided on the distal end side of the slide cylinder and connected in close contact with the head And provided with a connecting device capable of expanding and contracting in the axial direction of the vulcanized pipe, and connecting and releasing the vulcanized pipe and the head of the extruder,
At the start of continuous vulcanization of the rubber tube, a dummy rubber tube that is retracted through the rod portion by drawing the rod portion to form a space between the connecting portion of the coupling device and the head of the extruder. And jointing each end of the rubber tube from the head of the extruder in the space,
Thereafter, the rod portion is protruded, the vulcanized pipe and the head of the extruder are connected by the connecting device, and the dummy rubber pipe is started to be taken by the take-up machine to continuously extrude and vulcanize the rubber pipe. A continuous vulcanization method characterized in that it is carried out.

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