JP2002059432A - Apparatus for manufacturing vulcanized hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, when an unvulcanized hose having a reinforcing fiber layer provided therein is attached to a mandrel and the end part thereof is inserted in the vulcanizing cap on the side of the base part on the mandrel, a liquid inserting auxiliary agent such as a release agent or the like is discharged from the discharge hole provided to the bottom part of the vulcanizing cap so as to pierce the same axially and steam during vulcanization penetrates into the reinforcing fiber layer through the discharge hole and, as a result, the stability of adhesion or a dimension is lost and the end part must be cut after vulcanization, to omit the cutting of the end part. SOLUTION: The vulcanizing cap 7, on the side of the cylindrical base part of the mandrel, permitting the insertion of the end part of the unvulcanized hose 1 having the reinforcing fiber layer 32 provided therein is divided into an upper part 8 and a lower part 9 and a filter 3 comprising a reticulated porous material is interposed between the mating parts of both upper and lower parts 8 and 9. The discharge hole 26, which comes into contact with the filter 30 at one end thereof to be opened and opened to the outside at the other end thereof, is formed to the lower part 9 so as to axially pierce the same and arranged so as not to be superposed on the extension of the reinforcing fiber layer 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vulcanizing hose manufacturing apparatus, and more particularly to a novel and effective structure of a vulcanizing cap.

[0002]

2. Description of the Related Art When a fiber-reinforced unvulcanized hose is attached to a mandrel having a predetermined curved shape such as three-dimensional shape, and then vulcanized by a steam vulcanizing oven, the reinforcing fiber layer exposed at the end face of the unvulcanized hose is formed. As a result of the permeation of the steam, the adhesive performance to the inner and outer rubber layers is reduced, or the high-temperature, wet-heat-degradable one such as polyester fiber is deteriorated, and the shrinkable one such as polyamide is shrunk. The dimensions change. For this reason, it must be cut to a predetermined size after vulcanization.

[0003] However, such a cut after vulcanization is troublesome because the vulcanized hose may be bent in three dimensions or the like, and the cut and subsequent inspection become complicated, and the cut is removed by cutting. Doing so wastes material. Therefore, vulcanization is performed while covering the end of the unvulcanized hose with a vulcanization cap. For example, Japanese Patent No. 27777
There is No. 30.

In this example, when an unvulcanized hose is inserted into a vulcanization cap, an insertion aid such as a release agent remains at the bottom of the vulcanization cap, and this residue is removed from the end of the unvulcanized hose. As a result of insufficient insertion, even if a vulcanizing cap is used, the dimensions of the hose after vulcanization will be unstable, and eventually,
Since there is a possibility that the end of the uncured hose may be cut after vulcanization, a discharge passage extending long in the insertion direction of the unvulcanized hose and passing through the bottom of the vulcanization cap is provided. It is shown that the insertion aid is drained at the same time.

[0005]

By the way, the position of the discharge passage of the above-mentioned patent opening at the bottom where the end of the unvulcanized hose abuts in the vulcanized cap coincides with the position of the reinforcing fiber layer. For this reason, the insertion aid can be discharged when the unvulcanized hose is inserted, but the discharge passage communicates with the inside of the vulcanizing kettle during steam vulcanization. Penetrates into the reinforcing fiber layer. For this reason, the end of the unvulcanized hose must be cut after vulcanization, and the end cut after vulcanization cannot be omitted. In addition, the following problem arises when steam permeates the reinforcing fiber layer. Deterioration of polyester-based reinforcing fibers due to high temperature and humidity due to steam penetration and shrinkage of polyamide-based reinforcing fibers Cutting and inspection processes are required due to dimensional change and appearance deterioration of reinforcing fibers Loss of cutting allowance due to cutting and removal

[0006]

In order to solve the above-mentioned problems, a vulcanized hose manufacturing apparatus according to the present invention has an unvulcanized hose having a rubber layer formed inside and outside with an intermediate reinforcing fiber layer interposed therebetween to a predetermined size. In a vulcanizing hose manufacturing apparatus that cuts and attaches to a mandrel and vulcanizes by covering at least one end with a vulcanizing cap, the vulcanizing cap has a bottomed cylindrical shape,
The vulcanizing hose is provided with a peripheral wall part that is open at one end side and a bottom part that closes the other end side around the insertion space of the unvulcanized hose, and externally inserts an insertion aid when inserting the unvulcanized hose into the vulcanized cap. And a discharge passage for discharging the gas to the outside of the unvulcanized hose. And a one-way passage having a function of preventing passage.

[0007] Such a one-way passage function is such that when the unvulcanized hose is inserted, the insertion aid is passed to discharge to the outside, and at the time of vulcanization, steam is passed so as not to permeate the reinforcing fiber layer of the unvulcanized hose. The one-way functional member can be formed by providing a one-way functional member in the path of the discharge passage, and a porous communication member can be used as such a one-way functional member.

[0008] The one-way passage function is such that when the unvulcanized hose is inserted, the end surface thereof is brought into contact with the inner bottom surface of the vulcanizing cap, and a discharge passage communicating the inner bottom surface with the outside is provided. The inner bottom surface side opening position of the discharge passage may be arranged at a position radially displaced from the reinforcing fiber layer abutting on the inner bottom surface when the unvulcanized hose is inserted.

In the present invention, since the vulcanizing cap has a bottomed cylindrical shape, the axial direction of the cylindrical portion, that is, the insertion direction of the unvulcanized hose is referred to as the axial direction. The direction perpendicular to the direction is called the radial direction.

[0010]

According to the present invention, since the discharge passage has a one-way function, when the unvulcanized hose is inserted into the vulcanization cap, the insertion aid is quickly moved out of the vulcanization cap from the discharge passage. It can be discharged, and at the time of vulcanization, the vapor of the vulcanizing kettle can be prevented from entering the vulcanization cap from the discharge passage.

[0011] Therefore, it is possible to prevent the vapor during vulcanization from permeating into the reinforcing fiber layer at the end of the unvulcanized hose through the discharge passage, so that the adhesion of the reinforcing fiber at the end caused by the permeation of the vapor can be prevented. It is possible to prevent deterioration of the properties, deterioration of physical properties and dimensional change, etc., so that it is not necessary to cut the end of the vulcanized hose after vulcanization, and the inspection process for the presence of deterioration of the reinforcing fiber at the end is performed. Since it can be omitted, manufacturing efficiency can be significantly improved.

If a porous communicating member is provided in the discharge passage as a structure providing a one-way function, the insertion aid is discharged through the porous communicating member when the unvulcanized hose is inserted. The portion remains in the pores of the porous communication member and clogs the pores. For this reason, during vulcanization, the vapor of the vulcanization pot is effectively prevented from entering the vulcanization cap from the discharge passage, thereby exhibiting a one-way function.

In addition, even when a one-way functional member such as a porous communicating member is not used, the end surface of the unvulcanized hose is brought into contact with the inner bottom surface of the vulcanizing cap when the uncured hose is inserted.
A discharge passage communicating the inner bottom surface with the outside is provided, and the inner bottom surface opening position of the discharge passage is shifted to a position shifted in a radial direction from the reinforcing fiber layer abutting on the inner bottom surface when an unvulcanized hose is inserted. The same one-way passage function can be realized by arranging them.

That is, a space formed between the inner bottom surface and the end surface of the unvulcanized hose is discharged through the opening provided in the inner bottom surface until the end surface contacts the inner bottom surface when the unvulcanized hose is inserted. Since it communicates with the passage, the insertion aid is easily discharged with the insertion of the unvulcanized hose.

Thereafter, when the end surface of the unvulcanized hose contacts the inner bottom surface of the vulcanization cap, the exposed portion of the reinforcing fiber layer is covered by the close contact of the inner bottom surface, and the opening of the discharge passage is formed of the unvulcanized hose. Since it is closed by the rubber layer, the vulcanized steam is prevented from penetrating into the reinforcing fiber layer through the discharge passage during the vulcanization, so that a one-way passage function can be realized.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to the first embodiment. FIG. 1 is a view showing a state in which an unvulcanized hose is attached to a mandrel at the time of vulcanization. FIG. 2 is an enlarged cross section of a base side vulcanization cap in an unvulcanized hose attached state. FIG. 3 is an exploded sectional view of the base side vulcanization cap, and FIG. 4 is an enlarged view of a portion A in FIG.

First, as shown in FIG. 1, an unvulcanized hose 1 cut to a predetermined size is mounted on a mandrel 2 bent into a two-dimensional or three-dimensional shape. 2a, 2
b is a bent portion. One end in the length direction of the mandrel 2 forms a free end 3, and an annular groove 4 is formed around the vicinity of the free end 3. The base 5, which is the other end, forms a small diameter portion and is attached to the support 6.

The mandrel 2 is a rod-shaped member made of a suitable material such as a metal such as aluminum or a resin, and is usually provided vertically long so as to protrude upward from the support table 6 as shown in the figure, and the base 5 is supported. It is attached to the table 6 from above. A base-side vulcanizing cap 7 is attached around the base 5. When the unvulcanized hose 1 is mounted on the mandrel 2, an insertion aid such as a release agent is applied to the inner surface of the unvulcanized hose 1 and / or the outer surface of the mandrel 2, and then the unvulcanized hose is applied. One end of the mandrel 2 is inserted from the tip 3 side of the mandrel 2.

The base-side vulcanizing cap 7 is used for the unvulcanized hose 1
Is a bottomed cylindrical member having an inner diameter hole of about the same outer diameter as above, and also serves as a receiving portion for an insertion aid that is extruded when the unvulcanized hose 1 is mounted on the mandrel 2.

The base-side vulcanizing cap 7 is an integrated member obtained by combining two members, which are divided into an upper part 8 and a lower part 9, and is formed between the inner peripheral side and the mandrel 2. One end of the unvulcanized hose 1 is inserted from above into the space to be formed. The other end of the unvulcanized hose 1 faces the edge of the annular groove 4 on the opposite side of the tip 3 and surrounds the tip side vulcanization cap 10.
The surroundings are fixed by covering.

The tip side vulcanizing cap 10 is a cylindrical body made of a suitable elastic member such as rubber, and has an annular projection 11 formed on its inner periphery to engage with the annular groove 4.
A small-diameter portion 12 having an inner diameter substantially equal to the outer diameter of the distal end 3 with respect to the tip 1, and a large-diameter portion 13 having an inner diameter approximately equal to the outer diameter of the unvulcanized hose 1 from the annular projection 11 on the side opposite to the distal end 3. I have.

The unvulcanized hose 1 is attached to the mandrel 2 by inserting one end from the tip 3 side, and the lower end is inserted into the base-side vulcanization cap 7 previously attached to the base 5 to the bottom. The end of the unvulcanized hose 1 is abutted and fixed,
The upper end is fixed by a tip side vulcanizing cap 10 attached to the tip 3. Thereby, the length of the unvulcanized hose 1 is fixed to a predetermined dimension.

In this state, the unvulcanized hose 1 is vulcanized by being introduced into the vulcanizing pot 14 and heated for a predetermined time with steam at a predetermined temperature and pressure. Thereafter, if the vulcanization hose 15 is removed from the mandrel 2 by removing the tip side vulcanization cap 10 and the vulcanization hose is vulcanized to a predetermined size, a finished product can be obtained without the need for cutting the end after vulcanization. it can.

Next, the base side vulcanization cap will be described in detail with reference to FIGS. As shown in FIGS. 2 and 3, the upper part 8 and the lower part 9 are members made of an appropriate material having a certain degree of rigidity, such as resin and metal, respectively.
The lower part 9 forms a bottomed cylindrical body.

As is apparent from FIG. 3, the inner peripheral surface of the upper portion 8 forms a trumpet-shaped curved guide portion 16 whose upper inner periphery gradually expands outward and the lower side has a constant inner diameter D. The through hole 17 is formed. A small diameter fitting portion 18 is formed at a lower portion of the outer periphery, and an upper portion thereof is a step portion 19.

The lower portion 9 is a bottomed cylindrical body having an annular wall 20 fitted outside the small diameter fitting portion 18 and a bottom body 21 formed continuously below the annular wall 20. The interior space 20a surrounded by the opening is open upward, and the surface of the bottom main body 21 facing the interior space 20a forms an inner bottom surface 21a, where the lower end of the interior space 20a is closed.

At the center of the bottom main body 21, a small-diameter hole 22 for fitting the base 5 which is an end formed to a small diameter of the mandrel 2, and a larger-diameter hole of a general diameter of the mandrel 2 are fitted. A large-diameter hole 23 is formed stepwise in the axial direction of the lower part 9 so as to penetrate therethrough. A screw hole 24 for fixing the lower part 9 to the base 5 is formed in the large-diameter hole 23 in a direction perpendicular to the axis thereof.
The lower part 9 is fixed to the base part 5 by screwing a screw 25 (FIG. 1) from the outer peripheral part of the bottom body 21 here.

Further, a small diameter hole 22 and a discharge hole 26 are formed concentrically with the small diameter hole 22 and radially outwardly of the small diameter hole 22 so as to penetrate the bottom body 21 in the axial direction.
a, and communicates the inner space of the annular wall 20 with the outside of the bottom body 21. The discharge holes 26 constitute a discharge passage of the present invention, and the number thereof is arbitrary. The discharge holes 26 can be formed singly or two at 180 ° intervals, three at 120 ° intervals, four at 90 ° intervals, and the like.

One or more screw holes 27 are also formed in the wall of the annular wall 20 in the direction perpendicular to the axis of the annular wall 20, and a screw 28 (FIG. 2) is screwed into the hole so as to fit. Upper part 8 and lower part 9 are integrated. However, screw 28
If the sealing member such as an O-ring which engages with both is provided on the fitting joint surface between the annular wall 20 and the fitting small diameter portion 18 instead of the fixing by the above, the upper part 8 and the lower part 9 can be disassembled and assembled with one touch. And a reliable seal during use. ,

An approximately donut-shaped filter 30 is interposed between the upper part 8 and the lower part 9. The filter 30 is made of a nonwoven fabric,
It is a porous communication member made of an appropriate material having a large number of communication holes such as paper and a wire mesh, and a through hole 31 corresponding to the large-diameter hole 23 is formed at the center thereof.

The outer diameter of the filter 30 is substantially equal to the inner diameter of the annular wall 20.
It covers the entire surface of 1a. Filter 30
Of the annular wall 20 coincides with the height H2 of the annular wall 20 (T + H1 = H).
2)

FIG. 4 shows a state in which the unvulcanized hose 1 is inserted. The unvulcanized hose 1 has a structure in which an inner rubber 33 and an outer rubber 34 made of an appropriate rubber such as EPDM are laminated with a reinforcing fiber layer 32 interposed therebetween. It is. The reinforcing fiber layer 32 can be appropriately formed by Karami weaving and Russell weaving using polyester fibers, Russell weaving using nylon fibers, and the like.

The end of the unvulcanized hose 1 composed of these layers is cut in advance so that the entire length becomes a predetermined dimension, and this cut surface is in contact with the filter 30. At this time, the position of the discharge hole 26 is formed at a position displaced outward in the radial direction from the reinforcing fiber layer 32 and does not coincide, that is, on the extension of the small diameter fitting portion 18 in this embodiment.

The filter 30 of the present embodiment is formed of a wire mesh, and has pores formed between the knitting wires 30a and 30b forming a lattice. The size of the pores is set to such an extent that the insertion aid 35 can be impregnated and held, and is determined in consideration of the surface tension of the insertion aid 35 and the like. A relatively coarse one with a number of ~ 100 is used.

These can be used alone or in a plural number. In addition, ceramic, pumice,
Heat resistant materials such as asbestos and glass fiber are preferred. The insertion aid 35 is applied to the inner surface of the hole of the unvulcanized hose 1 so that the unvulcanized hose 1 is easily attached to the mandrel 2 and when the end is inserted into the base-side vulcanizing cap 7. It is a suitable material such as an agent, and exhibits a liquid state at least when the mandrel 2 of the unvulcanized hose is attached and vulcanized.

Next, the operation of this embodiment will be described. The base side vulcanizing cap 7 is moved from the disassembled state shown in FIG.
When one end of the unvulcanized hose 1 which is integrated with a zero in between and inserted and attached to the mandrel 2 is inserted into the base side vulcanization cap 7, the result is as shown in FIG. At this time, the insertion aid 35 extruded by the tip of the unvulcanized hose 1 is extruded from the pores of the filter 30 and enters the discharge hole 26, is discharged to the outside of the base side vulcanization cap 7, and is unvulcanized. The distal end surface of the hose 1 comes into contact with the surface of the filter 30. Therefore, in this embodiment, the surface of the filter 30 becomes the hose end contact surface.

In this state, most of the insertion aid 35 is discharged from the vulcanization cap 7 on the base side, but is partially impregnated and retained in the pores of the filter 30 because it is partially liquid, and the pores are clogged. . Then, in this state, put into the vulcanizing kettle 14,
Steam vulcanization is performed at about 150 ° C. to 170 ° C. for several tens of minutes. At this time, even if the vapor in the vulcanizing pot 14 enters the discharge hole 26, the filter 30 removes the insertion aid 35 retained in the pore.
And cannot pass through the filter 30.

For this reason, steam cannot penetrate into the reinforcing fiber layer 32, and as a result, the physical properties of the reinforcing fiber layer 32 on the end face of the unvulcanized hose 1 in contact with the filter 30 and the adhesion to the inner and outer rubber layers The properties and physical properties as well as the dimensions of the ends are stabilized, and the ends of the unvulcanized hose 1 after vulcanization are in a favorable vulcanized state. In particular, even if a polyester fiber is used as the reinforcing fiber layer 32, it does not deteriorate, and even if a polyamide fiber such as nylon is used, it does not shrink.

Therefore, since there is no need for subsequent cutting, a cutting step after vulcanization is not required, and by cutting a vulcanized hose having a complicated bent shape, the end cutting after vulcanization which was originally troublesome is performed. The step and the subsequent inspection step for the cut portion can be omitted, and the production efficiency can be significantly improved. In addition, the cutting fee (usually 1
(0 to 50 mm) is required, but this can be omitted, so that the cutting margin loss can be reduced.

The end of the reinforcing fiber layer 32 which abuts on the filter 30 at the time of vulcanization comes into contact with the insertion aid 35, which is impregnated and retained in the filter 30. The penetration amount into the reinforcing fiber layer 32 is practically negligible, and the liquid insertion aid 3
When 5 comes into contact with the reinforcing fiber layer 32, the adverse effect on the end of the vulcanized hose can be ignored as compared with the case where steam permeates the reinforcing fiber layer 32, and the end cut after vulcanization is unnecessary. Can be.

Further, since the discharge hole 26 is shifted in the radial direction from the end face of the unvulcanized hose 1, the discharge hole 26, the filter 3
0, the path between the unvulcanized hoses 1 becomes maze-shaped, which can also prevent the permeation of steam. Further, the end surface of the unvulcanized hose 1 is formed on the inner bottom surface 2 where the opening of the discharge hole 26 is formed.
Since it is not in direct contact with 1a, no protrusion after vulcanization is formed on the end face, and the dimensional accuracy of the vulcanized hose 15 is improved.

In addition, the filter 30 is connected to the upper part 8 and the lower part 9.
The filter 30 is easily and reliably fixed because the upper portion 8 and the lower portion 9 can be easily separated from each other, so that the filter 30 can be easily replaced and the maintainability is improved.

Next, a second embodiment will be described with reference to FIG. FIG. 5 is a view showing the base-side vulcanizing cap 7 corresponding to FIG. 2, and has a vertically divided structure consisting of an upper part 8 and a lower part 9 as in the previous embodiment, and a filter between the upper part 8 and the lower part 9. 30. However, in the present embodiment, the discharge hole 26 is formed as a radial through hole having one end opened to the outer peripheral portion of the filter 30 and penetrating the annular wall 20 in the radial direction and the other end opened to the outside. Are different.

In this way, the side end of the discharge hole 26 inside the base-side vulcanization cap 7 is connected to the outer periphery of the filter 30, so that the unvulcanized hose 1 is connected to the base-side vulcanization cap 7. When inserted into the filter 30, the insertion aid 35 is
Through the discharge hole 26 to the outer peripheral portion of the base side vulcanizing cap 7, the discharge hole 26 can be short and the inner opening thereof can be formed at the position farthest from the reinforcing fiber layer 32, Can be more reliably prevented from permeating the steam into the reinforcing fiber layer 32 in the step (a).

It should be noted that the base side vulcanizing cap 7 according to the present invention does not necessarily require the upper and lower two-part structure and the filter 30. Hereinafter, such another embodiment will be described. FIG. 6 relates to the third embodiment, in which the lower section shows a cross-sectional structure similar to that of FIG. 2 as C, and the upper section shows a plan view of the same as B. is there).

In this example, the base-side vulcanizing cap 7 is formed as a single structure as a whole consisting of the annular wall 20 and the bottom main body 21 by an appropriate method such as casting or resin injection molding. A longitudinal groove 40 is formed on the inner wall so as to extend the entire length in the axial direction. The number of the vertical grooves 40 is arbitrary, and the end on the bottom main body 21 side is continuous with the discharge hole 26 penetrating the bottom main body 21 in the axial direction. The opening position of the discharge hole 26 facing the inner bottom surface 21 a forming the hose end portion contact surface is a position shifted radially outward from the reinforcing fiber layer 32.

The cross-sectional shape of the vertical groove 40 has an appropriate shape such as a semicircle or a channel shape or a U-shape opened toward the internal space 20a, and the depth and width of the concave portion are both 1 mm.
It is preferably not less than 3 mm. If it is less than 1 mm, it cannot function sufficiently as a discharge passage of the insertion aid, and if it exceeds 3 mm, a large projection is formed on the outer surface of the vulcanizing hose 15,
When the clip is used to connect to the mating side, there is a possibility that the protrusion deteriorates the sealing performance.

In this way, when the unvulcanized hose 1 is inserted into the base-side vulcanization cap 7, the insertion aid 35 immediately passes through the vertical groove 40 and the discharge hole 26 to the outside of the base-side vulcanization cap 7. And a part thereof overflows from the vertical groove 40 to the opening end side of the annular wall 20.

Further, the opening position of the discharge hole 26 and the vertical groove 40
The formation position of the groove is shifted in the radial direction from the reinforcing fiber layer 32, and when the unvulcanized hose 1 is inserted into the base-side vulcanizing cap 7, the exposed portion of the reinforcing fiber layer 32 is in a liquid-tight contact with the inner fixed surface 21a. The opening of the discharge hole 26 which is covered by the contact and faces the inner bottom surface 21a which is the hose end contact portion is closed by the outer rubber layer 34.

For this reason, the vulcanization cap 7 during vulcanization is used.
Of the vulcanizing hose as in the previous embodiments can be stabilized, and the base-side vulcanizing cap 7
Can have a very simple structure to facilitate its manufacture.

FIG. 7 relates to a fourth embodiment in which the third embodiment of FIG. 6 is slightly modified, and is shown corresponding to FIG. In this example, the discharge hole 26 is the inner bottom surface 21 which is the hose end contact surface.
It is formed at substantially the same height as a and penetrating the annular wall 20 in the radial direction. Other structures are the same as those in FIG.

By doing so, the insertion aid 35 is quickly discharged from the discharge hole 26 to the outer peripheral portion of the base-side vulcanizing cap 7 as in the previous embodiment, and the discharge hole 26 is shortened and the inner opening is formed. It can be formed at a position farthest from the reinforcing fiber layer 32, and the penetration of steam into the reinforcing fiber layer 32 during vulcanization can be more reliably prevented. In addition, since it is not necessary to form a projection due to the opening of the discharge hole 26 on the end face of the vulcanized hose 1, the dimensions of the vulcanized hose 1 can be made accurate.

FIG. 8 relates to a similar fifth embodiment. In this embodiment, the discharge hole 26 is not continuous with the vertical groove 40 but is separately provided on the bottom main body 21.
In the axial direction. However, in this position, the opening to the inner bottom surface 21a which is the hose end contact surface is shifted from the reinforcing fiber layer 32 either radially outward (D) or inward (E). Even in this case, the reinforcing fiber layer 32
Vapor can be effectively prevented.

FIG. 9 relates to a sixth embodiment, in which the lower part 9 is further divided into left and right halves 50 and 51.
The lower part 9 forms a single cylindrical shape by combining the halves 50 and 51, and a step 52 formed around each upper part is formed by a half
When 0 and 51 are put together and integrated, it becomes a continuous small diameter portion.

A discharge hole 26 is formed in each of the halves 50 and 51 in the axial direction. On the opposite side of the halves 50 and 51, a concave groove 22 a having a semicircular cross section for holding the mandrel 2 from the left and right and mounting the mandrel 2 around the mandrel 2,
22b are formed, and are open at the upper and lower ends. Also, the halves 50 and 51 are integrated by a screw 55, and a through hole 53 for this is formed in the halves 5 and 51.
0 so as to penetrate in the direction orthogonal to the axis,
A screw hole 54 serving as a nut portion is provided in the corresponding portion of.

The upper portion 8 is almost the same as the previous embodiments, and has a guide portion 16, a through-hole portion 17 and the like, but a connection portion with the lower portion 9 is a female type. That is, a flange-shaped peripheral wall 56 is provided around the periphery, a screw hole 57 is formed on the side surface, and a screw 58 is screwed in from here to fix the fitting wall 52 on the lower part 9 side. The upper part 8 is formed with a bottom 59 surrounded by a peripheral wall 56, in which the filter 30 can be housed.

In order to attach the base-side cap 7 thus constructed to the mandrel 2, first, the lower portion 9 is attached to the left and right half 5
The mandrel 2 is divided into 0 and 51. These are fitted from the left and right sides of the base of the mandrel 2, the bases of the mandrel 2 are fitted into the respective concave grooves 22a and 22b, and the screws 55 are inserted into through holes 53 formed on the side surface of one half 50. Into the screw hole 54 formed in the corresponding position of the other half 51,
0 and 51 are integrated and mounted on the base of the mandrel 2.

Subsequently, the filter 30 and the upper part 8 are fitted to the other end of the mandrel 2 and moved in the longitudinal direction to the base. At this time, the upper portion 8 can smoothly pass through the bent portions 2a and 2b of the mandrel 2 because the guide portion 16 is flared. Filter 30 and upper part 8 are lower part 9
Above, the peripheral wall 56 is fitted to the outside of the step portion 26 formed around the halves 50 and 51 of the lower portion 9, and the filter 30 is placed between the upper end surface of the lower portion 9 and the bottom portion 59 of the upper portion 8. And the upper part 8 and the lower part 9 are connected and integrated with the screw 58.

In this way, the lower part 9 is connected to the mandrel 2
Even if the mandrel 2 is shaped such that it cannot pass through the bent portions 2a and 2b even if it is moved from the upper end portion to the base portion so that the lower portion 9 cannot be mounted, the lower portion 9 is formed by the left and right split structure. It can be detachably attached to the mandrel 2. At this time, the structure and function of the discharge hole 26 and the filter 30 are the same as in the first embodiment.

The present invention is not limited to the above embodiments, but can be variously modified and applied. For example, the filter 30 in the first and second embodiments is merely a specific example of a porous communicating member which is an example of a one-way function member for providing a one-way function of a discharge passage, As a member, the insertion aid 35 is used when the unvulcanized hose 1 is inserted.
Any member can be used as long as it is a member that functions to prevent the passage of steam into the inside during vulcanization, and as another example, it can also be realized by a one-way valve.

As the structure of such a one-way valve, various known structures can be appropriately adopted. In addition, the arrangement of the one-way functional member in the base-side vulcanizing cap 7 can be, for example, inserted into the discharge hole 26 as well as the joint portion of the upper portion 8 and the lower portion 9.

Further, the one-way function of the discharge passage in the present invention is realized not only by using the one-way function member as in the first and second embodiments, but also without using such a one-way function member. it can. That is, as in the third to fifth embodiments, the end face of the unvulcanized hose 1 is brought into contact with the inner bottom surface 21a, and the opening on the discharge hole 26 side is shifted in the radial direction from the position of the reinforcing fiber layer 32. It is.

Further, in each of the above embodiments, the present invention is applied only to the base-side vulcanization cap 7, but can be arbitrarily applied to the tip-side vulcanization cap 10.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a mandrel is attached to an unvulcanized hose 1 according to a first embodiment.

FIG. 2 is a sectional view of the base side cap.

FIG. 3 is an exploded view thereof.

FIG. 4 is a diagram showing the operation.

FIG. 5 is a view showing a base-side cap according to a second embodiment.

FIG. 6 is a diagram showing a plane and a side cross section of a base side cap according to a third embodiment.

FIG. 7 is a view similar to FIG. 6 according to a fourth embodiment;

FIG. 8 is a view similar to FIG. 6 according to a fifth embodiment.

FIG. 9 is an exploded sectional view of a base-side cap according to a sixth embodiment.

[Explanation of symbols]

1: unvulcanized hose, 2: mandrel, 3: tip, 4: annular groove, 7: base side vulcanization cap, 8: upper, 9: lower,
14: vulcanizing pot, 22: small diameter hole, 23: large diameter hole, 26:
Discharge hole, 30: filter, 32: reinforcing fiber layer, 33: inner rubber layer, 34: outer rubber layer, 35: insertion aid, 40:
Flute

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) B29K 105: 08 B29K 105: 08 B29L 23:00 B29L 23:00 (72) Inventor Hiromi Fujii Oimachi, Iruma-gun, Saitama Prefecture 1239 Kamekubo F-term (reference) in Yamashita Rubber Co., Ltd. DW06 DW13

Claims (13)

[Claims] 1. An uncured hose having a rubber layer formed inside and outside with an intermediate reinforcing fiber layer interposed therebetween is cut into a predetermined size, attached to a mandrel, and vulcanized by covering at least one end with a vulcanizing cap. In the hose manufacturing apparatus, the vulcanization cap has a bottomed cylindrical shape, and has a peripheral wall portion that is open at one end side around the insertion space of the unvulcanized hose and a bottom portion that closes the other end side, and When inserting an unvulcanized hose into the vulcanized cap, a discharge passage for discharging the insertion aid to the outside is provided, and the discharge passage is passed through the discharge passage to discharge the insertion aid to the outside when the unvulcanized hose is inserted. A vulcanized hose manufacturing apparatus characterized in that the vulcanized hose is configured as a one-way passage having a function of preventing passage of the unvulcanized hose during the vulcanization so that the vapor does not penetrate into the reinforcing fiber layer. 2. A one-way passage function of the discharge passage includes a one-way function member for discharging an insertion aid when an unvulcanized hose is inserted and preventing passage of steam during vulcanization, in a path of the discharge passage. The vulcanized hose manufacturing apparatus according to claim 1, wherein the apparatus is formed by providing. 3. The vulcanizing hose manufacturing apparatus according to claim 2, wherein the one-way function member is a porous communicating member. 4. An end of the unvulcanized hose is inserted into the vulcanization cap while one surface of the porous communication member is in contact with an inner wall surface of the vulcanization cap to connect the opening of the discharge passage. 4. The structure according to claim 3, wherein said end surface is brought into contact with the other surface of said porous communication member.
2. A vulcanized hose manufacturing apparatus according to item 1. 5. A position in which an opening of the discharge passage connected to the porous communication member is shifted so as not to overlap with the reinforcing fiber layer abutting on the porous communication member when inserted into the vulcanization cap. The vulcanized hose manufacturing apparatus according to claim 4, wherein the apparatus is formed as follows. 6. The vulcanizing hose manufacturing apparatus according to claim 5, wherein the discharge passage includes a discharge hole that penetrates the vulcanization cap in an axial direction and communicates inside and outside. 7. The vulcanizing hose manufacturing apparatus according to claim 5, wherein the discharge passage includes a discharge hole penetrating through the peripheral wall portion in a radial direction of the vulcanizing cap and communicating between the inside and the outside. . 8. The vulcanization cap is divided into two parts in an end insertion direction of an unvulcanized hose, and the porous communicating member is fixed by sandwiching between the divided parts. 8. A vulcanizing hose manufacturing apparatus according to any one of 4 to 7. 9. An unvulcanized hose divided into two parts in an end insertion direction, wherein a base side part is further divided into two parts in the left and right direction with respect to the insertion direction and is detachable from a mandrel base. An apparatus for producing a vulcanized hose according to claim 8. 10. An end surface of the unvulcanized hose is brought into contact with a hose end contact portion provided on the vulcanization cap when the uncured hose is inserted, and a space near the hose end contact portion is communicated with the outside. A discharge passage is provided, and an opening position of the discharge passage on the hose end portion contact portion side is arranged at a position shifted from a reinforcing fiber layer that contacts the hose end portion contact portion when an unvulcanized hose is inserted. The apparatus for producing a vulcanized hose according to claim 1, wherein: 11. A longitudinal groove formed in the inner wall surface of the peripheral wall portion to be inserted into the insertion space and communicating with an open end of the peripheral wall portion and the inner bottom surface so as to be long and continuous in the axial direction. The vulcanized hose manufacturing apparatus according to claim 10, further comprising: 12. The vulcanizing hose manufacturing apparatus according to claim 10, wherein the discharge passage includes a discharge hole that penetrates a bottom portion of the vulcanizing cap in an axial direction. 13. The vulcanizing hose manufacturing apparatus according to claim 10, wherein the discharge passage includes a discharge hole that penetrates a peripheral wall portion of the vulcanizing cap in a radial direction.