JP2003261922A - Manufacturing method for rubber weir - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a rubber weir which can be easily manufactured without much labor. <P>SOLUTION: The rubber weir is manufactured by connecting together split members 1 divided in the circumferential direction of a rubber weir. After constituent members of the rubber weir and molds 6 made of vulcanized rubber and/or metallic material are laminated in sequence, it is vulcanizably molded and then, the mold 6 is removed to form the split members 1 and the mutual split members 1 are connected and adhered to each other. In this way, the removing part to make the split member 1 is laminated by the mold made of vulcanized rubber and/or metallic material and the mold can be easily removed after vulcanization and the split member can be manufactured, and hence, it is not necessary to cut and remove a fiber reinforced layer and a rubber layer vulcanized and adhered together with labor. Accordingly, a rubber weir can be easily manufactured without much labor. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a rubber weir, and more particularly, to a method for manufacturing a rubber weir that can be easily manufactured without any trouble.

[0002]

2. Description of the Related Art Conventionally, rubber weirs have been used for damming rivers and waterways for the purpose of water intake at hydroelectric power stations, river flood control, and securing of water level in agricultural waterways. The rubber weir is formed by forming a rubber sheet into a bag shape as shown in a sectional perspective view in FIG. 2, and is fixed to the riverbed so as to cross the river.
The river can be dammed by injecting air or water into it to inflate it, and it can be used as a normal river if it is submerged in the riverbed without inflating the rubber weir.

For the production of this rubber weir, especially for large ones, the dividing member 1 is produced by dividing the rubber weir in the circumferential direction.
It has been performed by joining a plurality of vulcanized divided members 1 at a portion shown by a broken line in FIG. 2 through unvulcanized rubber or the like and vulcanizing and adhering them.

As shown in FIG. 3, the split member 1 is manufactured by inserting a release sheet S such as a polyethylene resin sheet into the fiber reinforced layer 2 and the top cover rubber 3 as shown in FIG.
After vulcanizing a laminate of the lower surface cover rubber 4, the fin rubber 5 and the like, the release sheet S is removed to remove the fiber reinforcing layer 2, the upper surface cover rubber 3 and the lower surface cover rubber 4 as shown in FIG. It was cut and removed in steps. Further, another split member 1 is produced in the same manner, and a plurality of split members 1 shown in FIG.
6 is spliced through unvulcanized rubber or the like, the unvulcanized cover rubber 7 is filled in the gap between the cover rubbers, and the spliced portion is heated and vulcanized to produce a rubber weir. Was.

However, there is a problem in that when the split member 1 is manufactured, the work of cutting the fiber-reinforced layers vulcanized and bonded together and removing them while peeling them off requires considerable labor and time.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for manufacturing a rubber weir, which can be manufactured easily without any trouble.

[0007]

According to the present invention, there is provided a method of manufacturing a rubber weir that joins divided members divided in the circumferential direction of the rubber weir, the constituent members of the rubber weir, and vulcanized rubber and / or After sequentially laminating a mold made of metal,
A method for manufacturing a rubber weir is provided in which vulcanization molding is performed, the mold is removed to form divided members, and the divided members are spliced together and bonded.

According to the present invention, the mold is
There is provided the above method for producing a rubber weir, wherein an inner surface portion of the rubber weir which is in contact with the step-like fiber reinforcing layer is made of metal and an outer surface portion thereof is made of vulcanized rubber.

As described above, the parts to be removed for producing the dividing member are laminated by the mold made of vulcanized rubber and / or metal, so that the mold is easily removed after the vulcanization to produce the dividing member. Therefore, it is not necessary to labor-cut and remove the vulcanized and bonded fiber-reinforced layer or the rubber layer, and the rubber weir can be easily manufactured without any trouble.

Further, according to the present invention, there is provided the above method for producing a rubber dam, wherein the rubber composition of the constituent member of the rubber dam contains ethylene propylene diene copolymer rubber or chloroprene rubber.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An example of the manufacturing method of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of a rubber dam in the circumferential direction of the rubber dam, showing a state in which the split member 1 of the rubber dam is being manufactured.

First, a plurality of fiber reinforced layers 2 in which canvas is covered with unvulcanized rubber are sequentially laminated on the upper and lower surfaces of a release sheet S such as a polyethylene resin sheet in a stepwise manner. Further, a pair of molds 6 matching the shape of the step-like fiber reinforcing layer 2 are laminated. The mold 6 is configured such that the inner surface portion 6a in contact with the step-like fiber reinforcing layer 2 is made of metal such as aluminum or iron, and the outer surface portion 6b is made of vulcanized rubber. Further, rubber layers such as the fin rubber 5, the upper surface cover rubber 3 and the lower surface cover rubber 4 are sequentially laminated. After heating and vulcanizing this using a heating plate or the like, as shown in FIG. 4, the upper surface cover rubber 3 and the lower surface cover rubber 4 and the mold 6 are removed, and then the release sheet S is also peeled and removed. The dividing member 1 that constitutes the terminal portion of the rubber weir is manufactured.
Since the mold 6 is made of a material that does not vulcanize and adhere to the rubber that covers the fiber reinforcing layer 2 that is a constituent member of the rubber weir, it can be easily peeled off without labor and can be repeatedly used. No scrap is generated.

The mold 6 does not have to be a combination of metal and vulcanized rubber as described above, and may be made of all metal or all vulcanized rubber, but as described above, It is preferable that the inner surface portion 6a in contact with the stepwise fiber reinforcing layer 2 is made of metal and the outer surface portion 6b is made of vulcanized rubber. That is, when the inner surface portion 6a is made of metal, it is possible to improve the molding accuracy of the staircase-shaped fiber reinforcing layer 2, and since the metal has excellent durability, the accuracy deteriorates even if it is repeatedly used. This is because the outer surface portion 6b is made of vulcanized rubber, and the mold 6 as a whole can be reduced in weight, so that handling and workability are improved.

The mold 6 may be integral or divisible, the inner surface portion 6a and the outer surface portion 6b can be divided, and the inner surface portion 6a formed in a staircase shape can be divided into a plurality of metal plates or vulcanized. You may make it combine rubber-like. By making the mold 6 separable in this way, it is possible to freely combine and use the respective constituent members corresponding to a plurality of rubber dams of various sizes.

Further, another division member 1 is similarly prepared,
A plurality of split members 1 as shown in FIGS.
Seam like. Although not shown, rubber cement is applied to the surface of the dividing member 1 at the joining portion, and tie rubber made of unvulcanized rubber is inserted. Further, the unvulcanized cover rubber 7 is also embedded in the gap between the upper surface cover rubber 3 and the lower surface cover rubber 4, and the vulcanized portion is heated and vulcanized while pressing the jointed portion with a heating plate or the like to vulcanize and bond the rubber dam. To manufacture.

The vulcanized rubber weir is fixed to the riverbed using a plate 8 and bolts and nuts 9 as shown in FIG. In addition, 10 is a fin in which the fin rubber 5 is arranged.

The release unvulcanized rubber sheet 6 and the rubber material of the constituent members of the rubber dam body are not particularly limited, and the natural rubber (N
R), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), polyisoprene rubber (IR),
Butyl rubber (IIR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene propylene copolymer rubber, ethylene propylene diene copolymer rubber (EPDM), and the like are used, and two or more of them are blended and used. You can also Above all, it is preferable that the constituent member of the rubber dam main body is chloroprene rubber (CR) or ethylene propylene diene copolymer rubber (EPDM) because the weather resistance of the rubber dam used for a long period of time can be improved.

[0018]

The present invention will be further described below with reference to examples, but the scope of the present invention is not limited to these examples.

First, as shown in FIG. 1, four upper and lower surfaces of a release sheet S made of a polyethylene resin sheet, four layers of fiber reinforcing layers 2 in which nylon fiber canvas is coated with EPDM, are formed stepwise, and an inner surface portion 6a is formed. Was made of aluminum and the outer surface portion 6b was made of vulcanized rubber (a blend rubber of NR and SBR). Next, the upper surface cover rubber 3 and the lower surface cover rubber 4 were laminated on the upper and lower surfaces, respectively. This was heated and vulcanized using a heating plate. Next, part of the upper surface cover rubber 3 and the lower surface cover rubber 4,
The mold 6 and the release sheet S were peeled and removed to obtain a rubber weir dividing member 1 having a thickness of 26 mm and a width of 2500 mm as shown in FIG. Since the mold 6 is not vulcanized and adhered to the constituent members of the rubber dam, it can be easily peeled and removed, and the divided member 1 can be easily manufactured.

Next, other split members 1 are produced in the same manner, and a plurality of split members 1 as shown in FIGS. 5 (a) to 5 (e) are applied to the surface of the split member 1 without applying any rubber cement. EPDM of sulfur
A tie rubber consisting of was inserted and spliced as shown in FIG. Next, the unvulcanized cover rubber 7 is also embedded in the gap between the upper surface cover rubber 3 and the lower surface cover rubber 4, and the seamed portion is heated and vulcanized by using a heating plate to be vulcanized and bonded to manufacture a rubber dam. .

[0021]

According to the present invention, the constituent members of the rubber weir, the constituent members and the mold made of vulcanized rubber and / or metal are sequentially laminated and then vulcanized and molded, and the mold is removed to form the dividing member. It is possible to obtain a method for manufacturing a rubber weir that can be easily manufactured without forming a labor by forming and joining and joining the divided members.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a divided member of a rubber weir is being manufactured.

FIG. 2 is a cross-sectional perspective view showing a state where the rubber weir is attached to the riverbed.

FIG. 3 is a cross-sectional view showing a state during manufacturing of a conventional rubber weir dividing member.

FIG. 4 is a sectional view of a split member of a rubber weir.

FIG. 5 is a sectional view of a dividing member of a rubber weir.

FIG. 6 is a cross-sectional view showing a state in which a rubber weir is being manufactured.

[Explanation of symbols]

1 split member 2 Fiber reinforcement layer 3 Top cover rubber 4 Bottom cover rubber 5 fin rubber 6 mold 6a inner surface 6b outer surface 7 Unvulcanized cover rubber 8 plates 9 bolts and nuts 10 fins S release sheet

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B29K 105: 24 B29K 105: 24 B29L 31:10 B29L 31:10 F term (reference) 2D019 AA31 4F100 AK28A AK28C AK75A AK75C AN00A AN00C BA03 BA06 BA10A BA10C DA11 DH02B EJ06A EJ06C GB90 4F203 AA46 AG03 AH43 AH81 AJ02 AJ05 AJ08 DA11 DC01 DJ01 DL10

Claims (3)

[Claims] 1. A method of manufacturing a rubber weir that joins divided members divided in the circumferential direction of the rubber weir, which comprises sequentially stacking a constituent member of the rubber weir and a mold made of vulcanized rubber and / or metal. A method for manufacturing a rubber weir in which vulcanization molding is performed, the mold is removed to form a divided member, and the divided members are spliced and adhered to each other. 2. The method for producing a rubber dam according to claim 1, wherein the mold has an inner surface made of metal and an outer surface made of vulcanized rubber in contact with the stepwise fiber-reinforced layer of the rubber dam. 3. The rubber composition of the constituent member of the rubber dam,
The method for producing a rubber weir according to claim 1 or 2, comprising ethylene propylene diene copolymer rubber or chloroprene rubber.