JP2002254528A - Method and apparatus for demolding belt sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mechanize a peeling process of a vulcanized double cog type belt sleeve and an outside mother die and to efficiently facilitate the first demolding process in which an inside mother die having a drum with a belt sleeve is extracted from the outside mother die. SOLUTION: A method for demolding the belt sleeve in which the double cog type belt sleeve v in which cog parts are arranged in a compressed rubber layer and a stretched rubber layer is extracted together with the inside mother die 1 with the drum which is engaged internally with the belt sleeve v from the outside mother die 2 engaged externally with the belt sleeve v includes a forcible moving process in which the inside mother die 1 with the drum onto which the belt sleeve v is wound is lifted slightly in the belt sleeve v axis direction in relation to the outside mother die 2 by being pressed by an ascending/ descending cylinder 9 and an extraction process in which the inside mother die 1 with the drum which is moved forcibly is extracted from the outside mother die 2 by being pulled with the position of the outside mother die 2 fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing an inner matrix with a drum around which a vulcanized double cog type belt sleeve is wound from an outer matrix in a manufacturing process of a double cog belt. In detail, the unmolding work of the inner and outer molds with drums is mechanized without inconvenience,
The present invention relates to a technique for obtaining advantages such as reduction of labor and improvement of manufacturing efficiency.

[0002]

2. Description of the Related Art As a method of manufacturing a double cog belt such as a low edge, a preform manufacturing method and a spun cog manufacturing method are well known. In the spancog manufacturing method, a reinforcing cloth and an unvulcanized rubber sheet, which are not previously molded, are wound around an inner matrix having a cylindrical drum attached to a mold, and the core wire is spirally wound with a large tension. In this method, an unmolded canvas and an unvulcanized rubber sheet are wound, fitted into a cylindrical outer matrix having a cog shape on the inside, the molding is completed, and the fabric is transferred to a vulcanizing step.

In the preform manufacturing method, a reinforcing cloth and an unvulcanized rubber sheet are placed in a flat mold in which teeth and grooves are alternately arranged and pressurized to form a cog shape. Form a cog pad, fit the cog pad into a cylindrical inner mold with a drum attached to the mold during molding,
Both ends of the cog pad are butted and joined to make them endless. Then, after the core wire is spirally wound around the endless cylindrical cog pad, an unmolded unvulcanized rubber sheet and canvas are wound, and a cylindrical outer mold having a cog shape inside. Into the vulcanization process.

In any of the above-mentioned manufacturing methods, it is necessary to remove the belt sleeve from the both molds after the vulcanizing step in a state surrounded by the inner and outer molds. A first demolding step of extracting the wound inner mother die with drum from the outer mother die is performed. In the first demolding step, first, a peeling step of separating the belt sleeve from the outer matrix is performed so that the inner and outer matrixes can be easily separated from each other.

That is, since the outer mold is made of a hard rubber material and has a certain degree of flexibility, conventionally,
A spatula made of a long nylon resin plate over the entire length of the outer mold is inserted between the belt sleeve and the outer mold by manual operation by force, and then the spatula is again artificially operated in the circumferential direction. The belt sleeve and the outer mold were separated by an artificial separation step of forcibly moving the belt sleeve.

[0006]

Since the conventional peeling process is performed by an artificial operation, it is good that no equipment is required for this, but physical strength such as arm strength is considerably required, and labor is burdensome. And it took a lot of time. In addition, since the outer mold after the vulcanization treatment has a high temperature of 100 ° C. or more, there is a risk of burns during the peeling operation, and there is room for improvement in the peeling step by manual operation.

An object of the present invention is to mechanize the exfoliating step of the double cog type belt sleeve wound around the inner mold with a drum and the outer mold after vulcanization in a state where the operation is well performed,
A first demolding step of extracting an inner mother die with a drum around which a belt sleeve is wound from an outer mother die is performed easily and efficiently.

[0008]

According to a first aspect of the present invention, there is provided a double cog-type belt sleeve having cogs disposed on both a compression rubber layer and an extension rubber layer. In the belt sleeve demolding method for removing from the outer matrix which is fitted to the belt sleeve together with the matrix,
The inner mother die with drum around which the belt sleeve is wound,
A forced movement step of forcibly moving the outer matrix by a small distance by pressing the belt in the axial direction of the belt sleeve, and pulling the forcibly moved inner matrix with the drum in a state where the outer matrix is fixed in position. And a step of pulling out from the outer mold.

According to the first aspect of the present invention, the inner mold with the drum around which the belt sleeve is wound is pressed in the axial direction of the belt sleeve with respect to the outer mold and is forcibly moved by a slight distance. The belt sleeve and the outer mold can be separated from each other by the strong pressing force in the shearing direction by the forcible moving process. Then, in the drawing step in a state where the belt sleeve and the outer mold are separated, since the drag resistance between the two is clearly smaller than before the separation,
For example, the inner mold with the drum can be easily and easily pulled out of the outer mold by using a simple mechanism such as pulling up with a wire rope.

In other words, in order to separate the belt sleeve from the outer mold, the inner and outer molds may be simply pressed relative to each other in the axial direction of the belt sleeve. Can be mechanized, so that the labor is reduced and the working efficiency is improved as compared with the prior art by manual work. Further, as described above, the drawing step can be mechanized by a small-scale mechanism, so that the inner and outer molds with the drum around which the belt sleeve is wound can be efficiently, easily, and easily performed.

According to a second aspect of the present invention, in the method of the first aspect, the outer mold is formed by connecting a plurality of partial outer molds in the axial direction of the belt sleeve in a cylindrical shape. Things.

According to the second aspect of the present invention, the outer mold is formed by connecting a plurality of cylindrical outer molds in the axial direction of the belt sleeve. This facilitates the setting operation of the mold at the time of molding, as compared with the case where a single large outer mold is used. However, there is an inconvenience newly generated by dividing the outer mold into a plurality. This is because the belt sleeve softened by vulcanization enters the gap between the adjacent partial outer molds, and a so-called “burr” is formed, so that the operating force required for separating the belt sleeve from the outer mold increases. is there.

However, in the forcibly moving step, the inner mold having the drum is extruded by mechanization, so that the output of the drive source of the hydraulic cylinder or the like can be easily set by setting the output corresponding to the drive source. The effect of the method according to claim 1 can be obtained while using an outer mold having a divided structure that is advantageous in terms of manufacturing and handling.

According to a third aspect of the present invention, a double cog-type belt sleeve in which cogs are provided on both a compression rubber layer and an extension rubber layer is provided together with an inner matrix having a drum fitted therein. In a belt sleeve demolding device for extracting from an outer matrix that is externally fitted to a belt sleeve, an inner matrix with a drum around which the belt sleeve is wound is pressed against the outer matrix in the axial direction of the belt sleeve. A forced movement mechanism that forcibly moves the outer mold by a small distance, a fixed mechanism that can fix the position of the outer mold, and a state in which the outer mold is forcibly moved by a slight distance by the forced movement mechanism and the position of the outer mold is fixed by the fixing mechanism. And a pull-out mechanism for pulling out the inner matrix with the drum and pulling it out of the outer matrix.

According to the third aspect of the present invention, the belt sleeve and the outer mold can be separated from each other by the forcibly moving mechanism, and the outer mold can be fixed in position by the fixing mechanism.
The inner master with a drum provided with the belt sleeve can be pulled out by the drawing mechanism. That is, the same operation as the operation according to the first aspect can be obtained.

According to a fourth aspect of the present invention, in the configuration of the third aspect, the fixing mechanism is configured to pinch the outer peripheral surface of the outer matrix to fix the position of the outer matrix. Is what you do.

According to the fourth aspect of the present invention, the fixing mechanism fixes the position of the cylindrical outer mold by pinching the outer peripheral surface of the outer mold by using a frictional force. Compared to the means for making the outer mold, no change or remodeling is required for the outer mold. In addition, since the fixing mechanism can be arranged in a space where there is almost no restriction in terms of space, it is advantageous in that design and construction can be easily performed.

According to a fifth aspect of the present invention, in the configuration of the third or fourth aspect, the forcible moving mechanism acts from the bottom side of the inner master block with the drum arranged vertically so as to push up the inner master block with the drum. It is characterized by being constituted by a flexible fluid pressure cylinder.

According to the fifth aspect of the present invention, the inner mold having the drum is pushed up by the fluid pressure cylinder capable of obtaining a large force relatively easily, so that the outer mold is a single piece or a plurality of divided pieces. Regardless, the belt sleeve and the outer mold can be satisfactorily separated from each other. In addition, since the inner mold with the drum is removed by moving it upward, it is a die-cutting structure in the vertical direction which is advantageous in terms of the installation location, a slight upward movement by the forced movement mechanism, and a drum with a belt sleeve It is also preferable that the pull-out movement of the attached inner mold can be easily confirmed visually.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 10 shows an example of the double cog belt V. This double cog belt V has a core wire 22 inside.
Is formed of an adhesive rubber layer 21 having embedded therein, an expanded rubber layer 23 on the upper side thereof, and a compressed rubber layer 24 on the lower side. The extension rubber layer 23 and the compression rubber layer 24 are provided with cogs 25 and 26 along the belt longitudinal direction at a constant pitch, respectively.

Here, one cycle of the manufacturing process of the double cog belt V will be schematically described. For convenience of explanation, the one in which the inner mold 1, the belt sleeve v, and the outer mold 2 with the drum 4 are integrated is referred to as a molded mold S (see FIG. 2). 2 is referred to as a molded body s (see FIG. 4), and the inner matrix 1 with the drum 4 is molded m (see FIG. 5).
Reference).

First, in the case of preform molding, the raw material of the belt sleeve v is formed into a cog shape which has been previously molded.
Is wound around the mold m so as to fit in the cog shape of FIG. 5 to form a cog pad having an inner cog portion (see FIG. 5). The molded body s is formed by sticking a rubber inner mold 1 to the outer peripheral surface of the drum 4 using pine tar. Next, the cylindrical outer mold 2 made of hard rubber and having an inner diameter larger than the outer diameter of the molded body s is centered by interposing a plurality of guide rods 20 (the guide rods 20 are removed). (It is not necessary to use it.), And it is lowered from above and externally fitted to the molded body s by an artificial operation to bring the molded form S into a state (see FIGS. 6 and 7).

The molding die S is placed on the support 3 in the vulcanizing can, the cylindrical jacket J is fitted over the same, and the vulcanizing can lid F is covered from above (see FIG. 8). In this state, by applying high-temperature and high-pressure steam from the outer peripheral side of the jacket J, the outer mold 2 is forcibly pressed to the inner diameter side to reduce the diameter,
The outer cog portion 25 is formed on the outer peripheral surface of the cog pad, and the belt sleeve v on which the outer cog portion 25 is formed is vulcanized. Thereafter, the vulcanizing can lid F is opened, the mold S is removed from the jacket J, and the drum 4 is cooled by circulating water through its center hole 4a, and the drum S is cooled.
Blow-off action and air-cooling action are provided by air blowing from the outer peripheral side of the mold, and the mold S is cooled and dried.

Then, in a state where the outer mold 2 is fixed in position by the fixing mechanism K, a forcible movement step of operating the forcible movement mechanism L is performed, and the molded body s is lifted slightly upward by a distance, and the belt sleeve v and the outer mother The mold 2 is peeled off (see FIG. 3). Then, the slightly raised molded body s is pulled upward in a suspended state by the drawing mechanism M, and a drawing step of completely removing the formed body s from the outer matrix 2 is performed (see FIG. 4). The forcible moving step and the drawing step are defined as a first demolding step of removing the molded body s from the outer mold 2.

The removed molded body s is subjected to a canvas winding process on its outer periphery, and the fixing mechanism K, the forced moving mechanism L,
With the belt sleeve v fixed in position, the mold m is forcibly lifted and pulled up using the pull-out mechanism M, and a second demolding step of removing the belt sleeve v from the mold m is performed. Make (Fig. 9
reference). The double cog belt V having a desired width can be obtained by chopping the double cog belt V into which the upper and lower central portions have been removed for the reason described below and which has been divided into two, to a predetermined width. Next, a partial process, a structure of each part, and the like will be described.

FIG. 5 shows a method of forming the cog portion 26 inside the belt using the inner matrix 1. The inner mold 1 is a cylindrical body formed by cutting a hard rubber sheet having alternating teeth 1a and grooves 1b for forming the cogs 26 and cutting both ends together and joining both ends. It is formed on the outer periphery of the drum by inserting and bonding using pine tar. The drum 4 is for providing strength as a mold of the inner mother die 1 having poor self-retaining property, and is constituted by a cylindrical member of a metal material having a through hole 4a in the center.

First, several reinforcing cloths 15 and the compressed rubber layer 2
The unvulcanized inner cog portion 26 is formed by pressing a laminate of the unvulcanized rubber sheet 16 that becomes No. 4 and the unvulcanized rubber sheet 17 that becomes the adhesive rubber layer 21 against a cog-shaped mold. A cog pad is formed. The cog pad is wound around the inner matrix 1. Then, the core wire 22 is spirally wound around the outer periphery of the cog pad.
The belt sleeve v is manufactured by winding a laminate of 9 and the unvulcanized rubber sheet 18 to be the stretched rubber layer 23.

As shown in FIG. 6, an outer mold 2 having a relatively long length has a partial outer mold 2A, which is divided into two in the cylindrical axis direction.
2A is provided in the axial direction of the belt sleeve v. As a result, it is possible to suppress an increase in the size of the partial outer mold 2A as a single item, to facilitate portability and to improve handleability.

As shown in FIGS. 3 and 4, in the first demolding step of extracting the inner mold 1 having the belt sleeve v wound around the outer mold 2 from the outer mold 2, the belt sleeve v is removed from the outer mold 2. The method comprises a forced moving step of peeling off, and a pulling step of lifting (pulling) and pulling out the inner mold 1 with the belt sleeve, which has been slightly moved, with respect to the outer mold 2 having a fixed position. The belt sleeve v is of a double cog type in which cog portions 26 and 25 are arranged on both the compression rubber layer 24 and the extension rubber layer 23 and the core wire 22 is embedded in the adhesive rubber layer 21.

First, each mechanism used in the first demolding step will be described. As shown in FIGS. 1 and 2, in the first demolding step, a fixing mechanism K for fixing the position of the outer mold 2 so as not to move, and forcibly moving the inner mold 1 by pushing up the outer mold 2. For example, a pull-out mechanism M for lifting the inner matrix 1 by lifting the inner matrix 1 with respect to the outer matrix 2 is used.

The fixing mechanism K holds the four holding cylinders 6 via the annular frame 5 at a predetermined height position on the support base 3 at an equal angle (90
(Degrees). At the tip of the piston rod 6a of the holding cylinder 6,
A clamping pad 7 provided with a cushioning material 7a is provided on the front surface side. The position can be fixed by acting on the outer peripheral surface 2a. Note that the holding pad 7 is attached to the guide bar 27.
Is slidably fitted to and supported by the boss 5a of the annular frame 5.

The forcible moving mechanism L is composed of an elevating cylinder (an example of a fluid pressure cylinder) 9 vertically arranged in a pit 8 below the support table 3, and an elevating / lowering mechanism mounted at the tip of a piston rod 9a. The dimensions are set so that the inner matrix 1 is placed on the table 10.

The pulling-out mechanism M is composed of an overhead crane 12 mounted on the horizontal beam 11, and hooks a crane hook 14 into a hole 13a of a handle 13 formed at the upper end of the inner die 1. By raising, the inner matrix 1 can be moved up and down in a suspended state.

The operation of the first demolding step will be described. First, as shown in FIG. 3 (a), the fixing mechanism K is acted on the molding die S placed on the support base 3 after vulcanization processing (by extending the clamping cylinder 6 to drive it). The position of the mold 2 is fixed. Next, as shown in FIG. 3B, the forcible moving mechanism L is operated (the elevating cylinder 9 is extended and driven) to
0, the molded body s is forcibly raised slightly (about 100 mm) by a certain distance (about 100 mm) to perform a forced movement step of separating the belt sleeve v and the outer matrix 2 from each other.

Then, as shown in FIG. 4, a pulling-out step of operating the pulling-out mechanism M (by lifting and driving the overhead crane 12) to lift and move the formed body s is performed, thereby forming the formed body s into the outer mold. 2 can be completely removed. In other words, the peeling between the belt sleeve v and the outer mold 2 requiring a large force is performed by a strong output by the elevating cylinder 9, and the molded body s after the peeling is easily formed by the commercially available inexpensive overhead crane 12. It can be lifted and raised.

As described above, the outer mother die 2 having the cog mold 2b formed inside has two partial outer dies 2A, 2A.
The rubber material melted at the time of vulcanization molding penetrates between the outer molds 2A, 2A, and the protrusion that protrudes in the outer diameter direction, the so-called “burr”, is formed on the outer peripheral surface of the belt sleeve v Formed. Due to the increase in resistance due to the presence of the burrs, a large amount of power is required to separate the belt sleeve v from the outer mold 2, and the lifting cylinder 9 is used for this purpose. It is no longer possible to remove by manual operation as in the past.

Since the product cannot be used as a product due to the presence of burrs, the vulcanized belt sleeve v is cut and discarded at the longitudinal center (width: about 20 to 30 mm). In addition, the reason why the canvas is wound around the molded body s after vulcanization is that the release agent of the outer mold is adhered, and a slip is generated between the molded body s and the holding pad 7 of the fixing mechanism K in the second demolding step. It is for preventing.

[Another Embodiment] A fixing mechanism K presses the upper end surface of the outer matrix 2 from above to prevent the outer mold 2 from moving up even when the lifting cylinder 9 is extended. It may be something. The forced moving mechanism L may have a structure in which the compact s is lifted and raised by a hydraulic cylinder or the like. The pulling-out mechanism M may be of a structure different from the lifting / lowering cylinder 9 and of using a long-stroke fluid pressure cylinder to push up the compact s.

The fluid used for the holding cylinder 6 and the elevating cylinder 9 may be various fluids such as oil, air, and water. The outer mold 2 may be composed of a single part.

[0040]

According to the belt sleeve releasing method of the present invention, the belt sleeve and the outer mold are separated from each other by using the pressing force, and then the inner mold with the drum is pulled out of the outer mold. By devising the process, the conventional forced operation by manual operation becomes unnecessary, and the labor burden is drastically reduced, and the forcible moving process and the drawing process for that purpose can be made more efficient by mechanization.

In the belt sleeve releasing method according to the second aspect, the outer mold is divided into a plurality of parts in the axial direction of the belt sleeve, so that it is easy to carry and manage, and is advantageous in terms of production and handling. Thus, the above-described effect according to the method of claim 1 could be obtained.

In the belt sleeve removing device according to the third aspect, the belt sleeve and the outer mold are separated by the forcible moving mechanism, and the inner mold with the drum is separated from the outer mold by the fixing mechanism and the pulling mechanism. With the structure devised to function as a pull-out device, similar to the effect of the method of claim 1, the forcible peeling work by the conventional manual operation becomes unnecessary, and the labor burden is drastically reduced. Efficiency can be improved by mechanization.

In the belt-sleeve removing device according to the fourth aspect, the effect of the third aspect can be obtained while the fixing mechanism acting on the outer mold is in a preferable state that functions satisfactorily and satisfactorily. did it.

In the belt-sleeve removing device according to the fifth aspect, any one of the above-described effects of the configuration according to the third or fourth aspect is exhibited, and a fluid pressure cylinder suitable for a large output is used as a drive source of the forcibly moving mechanism. By devising, there is an advantage that the belt sleeve and the outer matrix can be satisfactorily peeled off while using space-saving equipment.

[Brief description of the drawings]

FIG. 1 is a plan view of mechanisms for performing a first demolding step.

FIG. 2 is a side view of a partially cutaway view showing mechanisms for performing a first demolding step.

FIG. 3A is an operation diagram of a fixing mechanism, and FIG. 3B is an operation diagram of a forced movement process.

FIG. 4 is an operation view showing a drawing step.

FIG. 5 is a plan view of a molded body composed of a mold and a belt sleeve being processed.

FIG. 6 is a perspective view of a molded body placed on a support base.

FIG. 7 is an operation view in the process of externally fitting the outer mold to the molded body.

FIG. 8 is a schematic side view showing a state of vulcanization treatment by steam heating.

FIG. 9 is an operation view showing a second demolding step.

FIG. 10 is a perspective view showing the structure of a double cog belt.

[Description of Signs] 1 Inner Die with Drum 2 Outer Die 2A Partial Outer Die 2a Outer Surface 9 Fluid Cylinder 23 Extension Rubber Layer 24 Compressed Rubber Layer 25, 26 Cog v Belt Sleeve K Fixing Mechanism L Forced Moving Mechanism M Pull-out mechanism

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Sugawara 4-1-1-21 Hamazoedori, Nagata-ku, Kobe City, Hyogo Prefecture Inside Mitsuboshi Belting Co., Ltd. No. 21 Mitsuboshi Belting Co., Ltd. F-term (reference) 4F213 AA45 AG17 AG28 WA54 WA92 WB01

Claims (5)

[Claims] 1. A double cog type belt sleeve in which cogs are disposed on both a compression rubber layer and an extension rubber layer, together with an inner matrix having a drum fitted therein, is externally attached to the belt sleeve. A method for removing a belt sleeve from a fitted outer matrix, the method including: pressing an inner matrix with a drum around which a belt sleeve is wound in an axial direction of the belt sleeve against the outer matrix. A forcible movement step of forcibly moving the drum by a slight distance, and a pulling step of pulling the forcibly moved inner master with a drum out of the outer master by pulling the inner master with the outer mother die fixed in position. Belt sleeve removal method. 2. The belt sleeve removing method according to claim 1, wherein the outer mold has a cylindrical shape and a plurality of partial outer dies are connected in the axial direction of the belt sleeve. 3. A double cog-type belt sleeve in which cogs are disposed on both a compression rubber layer and an extension rubber layer, together with an inner matrix having a drum fitted therein, is externally attached to the belt sleeve. A belt sleeve demolding device for extracting from a fitted outer matrix, wherein the inner matrix with a drum around which a belt sleeve is wound is pressed against the outer matrix in an axial direction of the belt sleeve. And a forced movement mechanism that forcibly moves a little distance
A fixing mechanism capable of fixing the position of the outer matrix, and the inner mold with the drum in a state where the outer matrix is forcibly moved by a slight distance by the forcible moving mechanism and the position of the outer matrix is fixed by the fixing mechanism. And a pulling mechanism for pulling the belt sleeve out of the outer mold. 4. The belt sleeve removing device according to claim 3, wherein the fixing mechanism is configured to pinch an outer peripheral surface of the outer matrix to fix the position of the outer matrix. 5. A fluid pressure cylinder, wherein the forcible moving mechanism is constituted by a hydraulic cylinder capable of acting on a bottom surface of the inner mold with a drum arranged vertically and capable of pushing up the inner mold with a drum. 5. The belt sleeve removing device according to 3 or 4.