JPH08294968A - Manufacture of rubber weir - Google Patents

Abstract

PURPOSE: To improve the adhesion of the joint of a rubber weir main body division by burying canvas which can be peeled easily from vulcanized rubber in a part which is desired to be peeled off and vulcanizing the rubber when the rubber weir main body division is formed. CONSTITUTION: An upper and lower main body divisions 1 which make a rubber weir main body is prepared in advance. In this process, Ox canvas 4 which can be peeled easily from vulcanized rubber later is buried in a part which is peeled off with a step formed, and the rubber is vulcanized after molding. Next, the joints of the divisions 1 which are bonded to each other are peeled off with the canvas 4. The peeling is easy because the canvas can be peeled easily from the vulcanized rubber. The peeled surface 4a, which is uneven to be advantageous for adhesion, does not need additional buffing, etc. When the divisions are contacted at the margins, the contact surface of the removed parts which were peeled off is located in the middle, and the breadth is increased in sequence to form a step. Unvulcanized rubber sheets 2 having the reinforcing canvas are engaged and laminated in sequence, and an unvulcanized rubber sheet is laminated as the uppermost layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-shaped rubber weir which stands up by sending in a fluid and crosses a river to form a weir, and the discharge of the fluid causes the weir to collapse and free the flow of the river. The present invention relates to a method for manufacturing a main body.

[0002]

2. Description of the Related Art When a rubber weir becomes large in size, a large space and a large facility are required to vulcanize and manufacture the rubber weir at a time, which is expensive in terms of facilities. Therefore, there has been conventionally disclosed a method of manufacturing a main body rubber weir by previously manufacturing a main body divided portion obtained by dividing the main body of the rubber weir in the circumferential direction and joining the divided portions. (Japanese Patent Publication No. 3-35098, Japanese Patent Laid-Open No. 6-226850)

As shown in FIG. 8 in both of the above-mentioned Japanese Patent Laid-Open Publications, in order to strengthen the adhesion of the edge of the vulcanization-molded rubber weir main body divided portion 01, for example, a step is formed at the end and the remaining portion is left. On the other hand, the rubber sheet 02 containing the reinforcing canvas (in the case of a vulcanized rubber sheet, the unvulcanized rubber is used) or the unvulcanized rubber containing the reinforcing canvas is separately molded according to the above step shape. As shown in FIG. 4, the rubber weir main body is completed by fitting into the step portion of the rubber weir main body divided portion and vulcanizing and adhering.

[0004]

The above method requires a step of forming a step on the edge of the rubber dam main body divided portion 01 which has been once vulcanized. At this time, the rubber surface between the reinforcing canvas is accurately peeled off, and then along the step, the corresponding vulcanized rubber sheet containing the reinforced canvas of the same composition, or recently, the unvulcanized rubber containing the reinforced canvas of the same composition. It is essential to vulcanize and bond the 02 by fitting correctly so that peeling and breakage from the bonding surface do not occur.

For this reason, in the past, as a method of producing this step, in order to form the step, the part 2 in FIG.
There is a process of peeling off using the special equipment and technique. This peeling work requires accurate manufacturing, so if the peeling speed is not slow enough, it will not peel off well on the rubber surface, so it takes a considerable amount of time for this process. I need it.

Further, when the rubber dam main body division rubber and the other equivalent rubber for the rubber dam are used for vulcanization and bonding when fitting on both step surfaces, (1) both adhesives are reinforced with a reinforcing material. In the case of vulcanized rubber, naturally vulcanization adhesion is made between the two via unvulcanized rubber, but in this case the vulcanization adhesion part becomes overvulcanized and the rigidity of the adhesion part becomes low and smooth. If the non-circular shape is not circular, and (2) the unvulcanized rubber containing the reinforcing material of the same composition as the rubber dam body split rubber is contacted and vulcanized and adhered,
A cross-linking agent such as sulfur migrates from the unvulcanized rubber to the vulcanized rubber, and the adhesive strength at the adhesive interface is reduced, which may cause peeling.

The present invention has been made in view of the above problems, and the first object thereof is to partly (manufacture the bonding surfaces of both of them wider to separate or break the bonded parts) of the manufacturing process. The step of providing a step to prevent
Secondly, it is to provide a method of manufacturing a rubber weir body that can further improve the adhesive force of the joint portion of the rubber weir body divided portion.

[0008]

In order to achieve the above object, the present invention provides a rubber weir that stands up by feeding a fluid and falls down by discharging a fluid as described in claim 1 and further claim 2. In the method for producing a rubber weir, wherein at least two rubber weir portions formed by dividing the rubber weir in the circumferential direction are integrally adhered to each other by post-adhering, the rubber weir body manufactured in advance For example, an appropriate step is provided at the edge of the divided portion, and the rubber weir main body divided portions are brought into contact with each other at the edge, and a vulcanized or unvulcanized rubber sheet containing a reinforcing canvas and an unvulcanized rubber sheet. In the method of manufacturing a rubber weir main body, wherein the rubber weir main body divided portions are vulcanized and bonded by fitting through (1), at least after vulcanization , With vulcanized rubber on the surface you want to peel off According to the method for manufacturing a large rubber weir, which comprises embedding and vulcanizing easy-to-separate canvas, further, as claimed in claim 2, a surface which is preliminarily along a portion where a step or the like is provided, that is, Since the insertion canvas and the rubber can be easily peeled off, and the step can be obtained more accurately than in the conventional case, this process can be greatly simplified.

The above-mentioned canvas or the like which can be easily separated from the vulcanized rubber means that when the material such as the canvas embedded in the unvulcanized rubber is integrally vulcanized, the material in the vulcanized rubber is then Is not particularly limited as long as it can be easily separated from the vulcanized rubber, but it is necessary that at least the material embedded in the rubber is a material that can sufficiently withstand the vulcanization temperature or time of the rubber, and more preferably Is preferably a material that, when peeled off from this material, causes the rubber surface to exhibit fine irregularities similar to those just buffed, and from this point, ox canvas or the like is preferably used.

Further, as (2) of the present invention, claim 3
As described above, a rubber weir that rises up when a fluid is fed in and falls down when it is discharged. At least two rubber weir portions formed by dividing the rubber weir in the circumferential direction are overlapped at both ends. In a method of manufacturing a large-sized rubber weir that is integrally bonded to each other by post-adhesion, a rubber sheet with a reinforcing canvas or a non-added rubber sheet with a reinforcing canvas, which is vulcanized by abutting the pre-manufactured rubber weir body divided parts When stacking the vulcanized rubber sheets on each other, prepare an unvulcanized rubber sheet (adhesive rubber) that has a sulfur content of 1 to 5 phr more than the rubber compound for the rubber dam of the main body, sandwich it between them, and then stack them. The strength of the bonded portion can be further improved by using the method for manufacturing a large-sized rubber dam which is characterized by vulcanization bonding. The amount of sulfur needs to be adjusted depending on the thickness of the unvulcanized rubber sheet sandwiched and the vulcanization conditions.

[0011]

First, a canvas which is easy to peel off from the vulcanized rubber is embedded and vulcanized in advance on the surface of the portion to be the step of the bonded portion later.
After that, by peeling it off together with the embedded canvas, it is possible to obtain a step accurately and easily. Furthermore, the separated surface has a suitable unevenness (buffing is required in the past) that is convenient for adhesion, that is, conventional buffing. You can get the status. Further, the surface becomes a fresh surface. That is, the first point of the present invention is to use a release surface of the canvas instead of the conventional peeling between the canvases, so that the surface of the vulcanized rubber to be bonded later can be more easily (1) moderately uneven ( (Anchor effect) is easily obtained, and further, (2) the adhesive surface is easily obtained as a normal surface (breedless state). Furthermore, the second point of the present invention is to prepare an unvulcanized rubber for bonding, which has a sulfur content of 1 to 5 parts more than that of the rubber dam main body rubber on the bonding surface, and sandwich it to separate the other rubber dam main body And vulcanization adhesion. If the amount of sulfur in the unvulcanized rubber for adhesion is equal to or less than that, the transfer of sulfur from the unvulcanized rubber to the vulcanized rubber causes a decrease in elastic modulus and a decrease in adhesive strength.

The present invention will be described below with reference to an embodiment shown in FIGS. 1 to 8, but the present invention is not limited to this embodiment. The present invention has a structure in which the manufactured rubber dam main body is folded back. First, as shown in FIG. 1, the upper and lower main body divided portions 1 forming the rubber dam main body are manufactured in advance. In that case,
As shown in (3), an ox canvas (made of PET) 4 which can be easily peeled off from the vulcanized rubber is embedded in a portion to be peeled off with a step, and vulcanized after molding. The rubber dam main body divided portion 1 has a rectangular plate shape, and the folded divided portion 1a has a shape obtained by double-folding a rectangular plate shape. Next, the ox canvas is peeled off at the joint portion of the rubber weir main body divided portion 1 to be joined to each other. At this time, since the ox canvas and the vulcanized rubber are easily peeled off, they can be easily peeled off. (Refer to FIG. 3) The peeled surface 4a does not need to be buffed because it is an uneven surface that is convenient for adhesion.

Next, when the rubber dam main body divided portions 1 are brought into contact with each other at their edges, as shown in FIG. 3, the stripped-off removed portion is gradually widened with the contact surface centered to form a step. ing. Next, along the step, a rubber sheet having a sulfur content of, for example, 3 phr larger than that of the rubber dam main body rubber of about 0.5 mm is attached over the entire surface. Further, the unvulcanized rubber sheet 2 with the reinforcing canvas is sequentially fitted and laminated from the removed portion of the lower layer to the upper layer. The outermost unvulcanized rubber sheet 3 is laminated on the uppermost layer to adjust the total thickness. (See Figure 4). In this way, the upper rubber weir main body divided portion 1 and the lower rubber weir main body divided portion 1 in which the reinforcing canvas-containing rubber sheets 2 and 3 are fitted and joined to each other in this manner are overlapped with the release sheet 6 interposed therebetween. . (See Fig. 5)

The folded back main body portion 1a is joined to one end portion, the rubber dam main body divided portion 1 is joined to the upper and lower sheets thereof in order, and the other end portion is an open end. The upper and lower seams are at the same position, and the hot plate for vulcanization 7 is sandwiched between the seams from above and below to perform vulcanization adhesion. In this way, the upper and lower parts are simultaneously vulcanized and bonded. The rubber weir main body 10 thus completed crosses the river and is fixed to the upstream side by stacking the upper and lower open end portions on the riverbed portion. When a fluid such as air or water is fed into the rubber weir body 10 having a bag shape, the rubber weir body expands and stands up as shown in FIG. It is possible to adjust the flow freely by falling down by discharging.

Further, although the rubber dam main body has a folded structure in the above-mentioned embodiment, the present invention can be applied to a case where a single sheet without folding is constructed in a bag shape. That is, as shown in FIG. 7, the rubber dam main body divided portions 21 each made of a sheet that is not folded back are sequentially vulcanized and bonded one by one to form one bag-shaped rubber weir main body 20.

[0016]

EXAMPLES The present invention will be further described with reference to examples, but the present invention is not limited to these examples. [Examples] Note that, in order to make sure, a rubber compounding example for the rubber dam of the present invention is shown in Table 1.

[0017]

[Table 1]

The method of manufacturing a rubber weir is as follows. First, unvulcanized rubber having the physical properties required for the rubber weir, for example, the compounding ratio shown in Table 1 (W = 3 m, t = 1 mm, L = weir length). In order to improve adhesion with the rubber, a so-called reinforcing material-containing unvulcanized rubber sheet, in which a reinforcing material such as dip-treated canvas is put in an adhesive liquid, is laminated in this order, for example, and then this is used. At this time, as described above, the ox canvas 4 having good releasability from the rubber is sandwiched so as to have a step shape in advance at this time, and then vulcanized. Obtain a weir partition. (See Figure 3)

Next, a second point of the present invention is to provide a vulcanized rubber sheet containing a reinforcing canvas material so that the main body divided bodies of the respective rubber weirs obtained as described above are fitted to each other at a step.
Alternatively, as shown in Table 1, an unvulcanized rubber sheet and an adhesive sheet having a sulfur content of 1 to 5 phr greater than that of the main rubber are laminated in accordance with the corresponding step portion of the rubber dam main body and vulcanized and adhered. . (See Figures 4 and 5)

[0020]

As described above in detail, according to the present invention, first of all, for example, in the step of providing a step or the like to widen the bonding surface, which has conventionally required many man-hours as described above, For example, the conventional peeling force is 15 Kg / c
Since m is also required, the process of carefully peeling off using a dedicated equipment / tool and at a slow stripping speed of 2.3 m / h is the present invention, that is, the rubber is provided on the surface where a step is obtained beforehand. It was made possible to embed an ox canvas, which can be easily peeled off with, and after vulcanization, peel it off instantly with a force (hand) of only 0.2 Kg / cm, and this step was greatly shortened.

As a second effect of the present invention, an unvulcanized rubber sheet (adhesive rubber sheet) having a sulfur content of 1 to 5 phr more than the compounded rubber for the rubber dam of the main body is used. Then, by vulcanizing and adhering, the strength of the adhering portion which is the manufacturing method by dividing the large rubber dam can be further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a rubber dam main body divided portion of an embodiment according to the present invention in an exploded state.

FIG. 2 is an exploded side cross-sectional view when molding with a removed portion.

FIG. 3 is a side sectional view of a rubber weir main body portion where a removed portion is formed.

FIG. 4 is an exploded side sectional view of a joint portion.

FIG. 5 is a partial perspective view of a rubber weir body during vulcanization adhesion.

FIG. 6 is a perspective view with a partial cross-section showing a standing up of a rubber weir constructed using the manufactured rubber weir main body.

FIG. 7 is a perspective view with a partial cross section showing a standing up state of a rubber weir constructed using the manufactured rubber weir main body of another embodiment.

FIG. 8 is a side sectional view of a joint portion of a conventional rubber weir body.

[Explanation of symbols]

 1.1a Rubber weir main body divided part 2 Reinforcement canvas-containing rubber sheet 3 Rubber sheet 4 Ox canvas 4a Ox canvas release surface 5 Adhesive rubber sheet 6 Release sheet 7 Vulcanizing hot plate 10 Rubber weir body 11 Seam 20 Rubber weir body 21 Rubber weir main body division

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area B29L 22:00

Claims (3)

[Claims] 1. A rubber weir that stands up by feeding a fluid and falls down by discharging, and at least two rubber weir portions formed by being divided over the circumferential direction of the rubber weir are post-bonded to each other. In the method for manufacturing a rubber weir integrally bonded to each other by means of a rubber sheet containing reinforced or unvulcanized vulcanized or unvulcanized vulcanized or unvulcanized rubber sheet, the pre-manufactured rubber weir main body divided parts are abutted at their edges. In a method of manufacturing a rubber weir main body characterized by fitting a rubber sheet and vulcanizing and adhering both of the rubber weir main body divided portion and the rubber weir main body divided portion, when the rubber weir main body divided portion is formed, A method for producing a large rubber dam, comprising embedding and vulcanizing canvas which is easily peeled off from a vulcanized rubber. 2. A rubber weir that stands up by feeding the fluid and falls down by discharging, and at least two or more rubber weir portions formed by being divided over the circumferential direction of the rubber weir are post-bonded to each other. In the method of manufacturing a rubber weir integrally bonded to each other, by providing an appropriate step on the edge of the prefabricated rubber weir main body divided portion, the rubber weir main body divided portion abuts each other at the edge, In a method for manufacturing a rubber weir body, characterized in that a vulcanized or unvulcanized rubber sheet containing a reinforcing canvas and an unvulcanized rubber sheet are fitted together to vulcanize and bond both the rubber weir body divided portion. When a rubber weir main body divided portion is created, a canvas which is easy to peel off from the vulcanized rubber is embedded and vulcanized on at least the portion surface to be peeled after the step is provided in advance. Rubber weir manufacturing method. 3. A rubber weir that stands up by feeding a fluid and falls down by discharging, and at least two or more rubber weir portions formed by being divided over the circumferential direction of the rubber weir are overlapped at both ends. In a method of manufacturing large rubber dams that are integrally bonded to each other by post-bonding together, a rubber sheet or a reinforcing canvas containing a reinforced vulcanized product in which pre-manufactured rubber weir main body divided parts are vulcanized by abutting at their edges When stacking unvulcanized rubber sheets in contact, the amount of sulfur is 1 to 5 ph
A method for manufacturing a large-sized rubber weir, characterized in that a large amount of unvulcanized rubber sheets are sandwiched between the two and then laminated and vulcanized and bonded.