WO2005005122A1

WO2005005122A1 - Method of manufacturing base material-filled rubber member and base material-filled rubber member

Info

Publication number: WO2005005122A1
Application number: PCT/JP2004/008622
Authority: WO
Inventors: Seiichi Kumate
Original assignee: Kokoku Intech Co., Ltd.
Priority date: 2003-07-11
Filing date: 2004-06-18
Publication date: 2005-01-20
Also published as: JP2005047262A

Abstract

A method of manufacturing a base material-filled rubber member capable of disposing a base material in a specified position without allowing the base material to be deformed by the filling speed of a rubber material or due to a difference in the pressure of the rubber material regardless of whether the cross sectional shape of the rubber material fixedly formed on the upper and lower surfaces of the base material formed in a specified shape such as a flat plate shape or an annular shape is symmetrical or asymmetrical and also allowing the use of a thin base material and the base material-filled rubber member used for the method. The method comprises a former step for molding the rubber member by pouring an unvulcanized rubber material in the specified volume part of a mold beforehand and a latter step for disposing the base material formed in the specified shape on the unvulcanized molded rubber material in the mold and vulcanizing the rubber material for integration.

Description

Specification

Method for producing rubber member with base material and rubber member with base material

Technical field

The present invention relates to a method for producing a rubber member containing a base material used for a device requiring a seal, such as a heat exchanger, a fuel cell, an HDD, and a water purifier, and a rubber member containing a base material obtained by the method. It is about.

Background art

[0002] In a device that handles fluid such as a heat exchanger or a fuel cell, an annular base material in which rubber materials are coated on both upper and lower sides of a base material having a desired shape, such as an annular metal plate as a seal member having an appropriate annular structure. A rubber member is used. This rubber member with a base material is formed by molding rubber on one or both sides of the base material, and the rubber material is poured into a mold having a ring-shaped base material with perforated holes through which the rubber material flows. It is formed by doing.

[0003] Further, when manufacturing a flat diaphragm or the like, it has been proposed to inject a rubber material into a mold frame and perform vulcanization molding (for example, see Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 9-292022

Disclosure of the invention

Problems to be solved by the invention

[0004] Incidentally, in the conventional rubber member containing a base material as described above, the rubber injection speed is fixed regardless of whether the volume of the rubber material fixedly formed on the upper and lower surfaces of the base material is symmetric or asymmetric. Alternatively, there has been a problem that the substrate is deformed by the pressure difference.

[0005] Especially, there is no problem if the rubber shapes on the upper and lower sides of the base material are symmetrical at the time of production, but various problems occur in the case of asymmetrical.

[0006] For example, as shown in FIG. 7, in forming an annular packing or the like, rubber materials 102, 103 fixedly formed on the upper and lower surfaces of a base material 101 in which rubber holes are scattered in some places are asymmetric. In this case, when the rubber is injected into the volume of each of the molds 104 and 105 by the injection member 106, a deformation occurs in the base material 101 due to a difference in pressure between the upper and lower sides, particularly when the base material 101 is thin. Becomes remarkable. Also, if many rubber injection gates are provided, it becomes expensive. The present invention has been made in view of the above problems, and has a cross-sectional shape in which a rubber material is fixedly formed on upper and lower surfaces of a base material having a preferred shape such as a flat plate shape or an annular shape. Symmetrically, regardless of asymmetry, the base material is not deformed due to rubber injection speed or pressure difference, so the base material can be placed at the target position, and the use of thinner base material Another object of the present invention is to provide a method for producing a rubber member containing a base material and a rubber member containing the base material.

Means for solving the problem

[0008] The present invention can solve the above-mentioned problems by providing the following configuration.

(1) A pre-process of pouring a rubber material into a predetermined volume portion of a mold in advance and performing unvulcanization molding, and thereafter, a base material having a desired shape is formed on the unvulcanized rubber material of the mold. And a post-process of vulcanizing and integrating the rubber material to form a rubber member with a base material.

(2) A method for producing a rubber member containing a base material in which a base material having a desired shape is sandwiched between rubber materials from both upper and lower sides, wherein a rubber material is poured into respective predetermined volume portions of upper and lower molds in advance. A pre-process for unvulcanized molding, and thereafter, a base material formed between the unvulcanized and formed rubber material of the mold.

A method for manufacturing a rubber member with a base material, comprising: a step of storing and arranging the base material in a space having the same size as the size, and vulcanizing and integrating the rubber material.

[0011] (3) The rubber material may be any one of gen-based rubbers such as NR, IR, BR, CR, SBR, NBR, NBIR, XNBR, and NOR, or non-gen-based IIR, BIIR, CIIR, EPM, EPDM, CSM, ACM, C〇, ECO, GCO, GECO, FKM, FEPM, MQ, VMQ, PMQ, PVM Q, FMG, FVMQ, AU, EU rubber, or AEM, ANM, HNBR rubber (1) or (2), wherein the method for producing a rubber member with a base material is provided.

(4) The rubber with a base material according to (1) or (2), wherein the base material is made of a metal, resin, paper, fiber, cloth, rubber, or any other material. A method for manufacturing a member.

(5) The molding temperature in the step before the rubber material is poured into the mold in advance is about 10 ° C. to 180 ° C. The base material according to (1) or (2), A method for manufacturing a rubber member. (6) A rubber member with a base material manufactured by the manufacturing method according to the above (1), (5) V or V.

(7) A rubber member containing a base material, which is a packing for a fuel cell manufactured by the manufacturing method described in (1) above, (5) V or V.

The invention's effect

According to the present invention, regardless of whether the cross-sectional shape of the rubber material formed on the upper and lower surfaces of the base material with respect to the base material is symmetrical or asymmetrical, the base material is deformed by a rubber injection speed or a pressure difference. Therefore, there is an effect that the substrate can be easily arranged and fixed at a target position, and a thin substrate can be used.

According to the present invention, the gasket / packing used not only in the diaphragm but also in the fuel cell and various heat exchangers is widely used.

Brief Description of Drawings

FIG. 1 is an explanatory cross-sectional view showing a configuration of a rubber member with a base material of an embodiment.

FIG. 2 is a cross-sectional explanatory view showing a configuration of a rubber member with a base material of an example.

FIG. 3 is an explanatory cross-sectional view showing a manufacturing process of the rubber member with the base material of the example.

FIG. 4 is a cross-sectional explanatory view showing a manufacturing process of the rubber member with a base material of the example.

FIG. 5 is an explanatory cross-sectional view showing a manufacturing process of the rubber member with a base material of the example.

FIG. 6 is a process chart showing a manufacturing method of an example.

FIG. 7 is an explanatory sectional view showing a conventional example.

Explanation of symbols

[0019] 1 Base material

2 Rubber material

3 Rubber material

4 Formwork

5 Formwork

g space

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

Example

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The rubber member with a base material according to the present invention comprises: a pre-process in which a rubber material is poured into a predetermined volume portion of a mold in advance and a non-vulcanized molding; The vulcanization molding is carried out by arranging a base material at a place where the material can be arranged, and vulcanizing the base material so that the rubber material and the base material can be integrated.

FIGS. 1 and 2 are cross-sectional explanatory views showing the configuration of a rubber member with a base material according to an embodiment of the present invention, in which oblique lines are omitted. FIG. 1 shows a case where the base material is flat, and FIG. The figure shows the case where the material is a three-dimensional surface that is deformed and projected. In addition, (a) of the figure shows a case where both ends of the base material are supported, (b) shows a case where one side is supported, and (c) shows a case where there is no support. In each of the drawings, the molded state of one side of the annular sealing material is shown.

The present embodiment is a case of a rubber member with a base material sandwiching a base material 1 from both upper and lower sides with rubber materials 2 and 3, and a rubber material is previously applied to predetermined volume portions 4 a and 5 a of the molds 4 and 5. It is manufactured by a pre-process of pouring and unvulcanized molding, and a post-process of vulcanizing the base material 1 by placing the base material 1 on the unvulcanized rubber materials 2 and 3 of the molds 4 and 5.

Here, as the rubber materials 2 and 3, the following materials based on gen or non-gen can be used.

NR (natural rubber)

IR (Isoprene rubber; synthetic natural rubber)

BR (butadiene rubber)

CR (chloroprene rubber)

IIR (rubber-like copolymer of isobutene and isoprene; butyl rubber)

SBR (rubber-like copolymer of styrene and butadiene)

EPM (rubbery copolymer of ethylene and propylene)

EPDM (rubbery copolymer of ethylene, propylene and gen)

NBR (rubber-like copolymer of acrylonitrile and butadiene; nitrile rubber)

CSM (chlorosulfonated polyethylene) ACM (rubber-like copolymer of ethyl acrylate or other acrylates with small amounts of monomers that allow vulcanization; acrylic rubber)

CO (polychloromethyloxylan; epichlorohydrin rubber)

ECO (rubbery copolymer of ethylene oxide and epichlorohydrin)

FKM (rubber-like copolymer having fluoro and perfluoroalkyl or perfluoroalkoxy groups in the side chain)

FEPM (rubber-like copolymer of tetrafluoroethylene and propylene)

VMQ (silicone rubber with methyl and bur substituents in the polymer chain)

FVMQ (silicone rubber with methyl, bul and fluoro substituents in the polymer chain)

AU (polyester urethane)

EU (polyether urethane)

AEM (rubbery copolymer of ethylene and other acrylates with ethylene)

ANM (rubbery copolymer of acrylonitrile with ethyl acrylate or other acrylates)

HNBR (Hydrogenated acrylonitrile / butadiene rubbery copolymer)

XNBR (Rubbery copolymer of carboxylated acrylonitrile and butadiene) NOR (Norbornene rubber)

NBIR (rubbery copolymer of acrylic nitrile, butadiene and isoprene)

BIIR (rubbery copolymer of brominated isobutene and isoprene; brominated butyl rubber

)

CIIR (rubbery copolymer of chlorinated isobutene and isoprene; chlorinated butyl rubber)

GCO (rubbery copolymer of epichlorohydrin and aryl glycidyl ether)

GECO (rubbery copolymer of ethylene oxide, epichlorohydrin and aryl glycidyl ether)

MQ (silicone rubber with methyl substituent on polymer chain; polydimethylsiloxane)

PMQ (silicone rubber with methyl and phenyl substituents on the polymer chain)

PVMQ (silicone with methyl and butyl substituents in the polymer chain Rubber)

Further, as the base material 1, a material made of any material of metal, resin, paper, fiber, cloth, and rubber can be used. Then, the upper and lower rubbers integrally formed on the upper and lower surfaces of the substrate 1 while excluding the volume of the substrate 1 specified by the shape of the substrate 1, that is, the planar shape and the thickness of the thickness. Create the formwork 4 and 5 with the material volume. Then, a rubber material is poured into the molds 4 and 5 and is unvulcanized. This step is a pre-step, and the forming temperature in this pre-step is desirably about 10 ° C to 180 ° C.

Next, a manufacturing process of the above-described pre-process of the rubber member with a base material of the above-described embodiment will be described with reference to FIGS.

In the present invention, basically, as shown in FIG. 3, a plate material 11 is interposed between the molds 4 and 5, and the volume of the molds 4 and 5 from which the shape of the base material 1 has been removed is provided. The rubber is poured into the portions 4a and 5a, and unvulcanized rubber materials 2 and 3 conforming to the shapes of the volumes 4a and 5a are formed on the upper and lower sides (both sides) of the base material 1 shown in FIG. 1 (a). That is, it corresponds to the pre-process of the present invention.

As another specific pre-process, as shown in FIG. 4, rubber is poured from the respective rubber injection containers 12 and 13 into the volume portions 4a and 5a of the respective molds 4 and 5, Unvulcanized rubber materials 2 and 3 can be molded. Reference numeral 14 denotes an injection member for injecting rubber.

FIG. 5 is a diagram showing another example of the pre-process. In this example, rubber is simultaneously poured from the rubber injection container 21 into the volume portions 4a and 5a of the two mold frames 4 and 5, and the rubber materials 2 and 3 are molded in a non-caloric state. Reference numeral 22 denotes an injection member for injecting rubber.

[0030] Thus, when the unvulcanized rubber materials 2 and 3 in the upper and lower stages obtained in the previous step are superimposed, the unvulcanized rubber materials 2 and 3 are preliminarily integrated with each other. Since a space part g corresponding to the same shape as the material 1 is formed, the space part g is shown in Fig. 1 (a) (b) (() ゃ Fig. 2 (&) (b) (c) In this way, the rubber material 2 and 3 can be integrally formed on the upper and lower surfaces of the substrate 1 by arranging the substrate 1 and pressing and heating and vulcanizing it with the molds 4 and 5. In other words, this can be performed later. It corresponds to a process.

As described above, in the rubber member with a base material of the present invention, the cross-sectional shapes of the rubber materials 2 and 3 that match the volume portions 4a and 5a of the molds 4 and 5 with respect to the base material 1 are symmetric and asymmetric. Despite the fact that the base material 1 is not deformed by the rubber injection speed or the pressure difference, It is possible to use a thin substrate 1.

FIG. 6 is a process diagram showing a schematic method for manufacturing the above-described rubber member with a base material.

[0033] S1 is a pre-process in which the rubber material is poured into the mold at a temperature lower than the vulcanization temperature and higher than the plasticization temperature.

, S2 is the process of setting the formwork with the base material, and S3 is then raising the temperature and vulcanizing the rubber material

The subsequent step, S4, shows the step of removing the mold.

As described above, in the present embodiment, two rubber materials that can be fixedly formed on the upper and lower surfaces of the base material in a mold frame in which the base material is not put in advance are set at a vulcanization temperature of about 10 ° C. and 180 ° C. The pre-process is completed by casting at a low temperature, then the desired base material is placed between the two rubber materials, squeezed and heated with a mold, and the temperature is raised to vulcanize the rubber material. Since it consists of a post-process, the substrate can be formed with an inexpensive configuration and the thickness of the substrate can be as thin as 0.5 mm or less, for example, and can be carried out without affecting the shape irregularities of the substrate at all. The deformation of the base material can be prevented not only on one side of the material but also when the rubber on the upper and lower sides of the base material is asymmetric. Further, the base material can be arranged at a target position without deforming the base material due to a rubber injection speed or a pressure difference.

Claims

The scope of the claims

[1] A pre-process of pouring a rubber material into a predetermined volume portion of a mold in advance and performing unvulcanization molding, and thereafter, disposing a base material having a desired shape on the unvulcanized molding rubber material of the mold, And a post-process of vulcanizing and integrating the rubber material.

[2] A method for producing a rubber member containing a base material in which a base material having a desired shape is sandwiched between rubber materials from both the upper and lower sides. A pre-forming step, and thereafter, the base material is accommodated and arranged in a space having the same size as a base material formed between the unvulcanized and formed rubber material of the mold frame, And a post-process of vulcanizing and integrating them.

[3] The rubber material may be one of Gen-based NR, IR, BR, CR, SBR, NBR, NBIR, XNBR, NOR rubber, or non-Gen-based IIR, BIIR, CIIR, EPM, EPDM, CSM, A CM, CO, ECO, GCO, GEC〇, FKM, FEPM, MQ, VMQ, PMQ, PVMQ, FMG, FVMQ, AU, EU rubber, or AEM, ANM, HNBR rubber 3. The method for producing a rubber member containing a substrate according to claim 1, wherein the rubber member comprises a base material.

[4] The method for producing a rubber member with a base material according to claim 1 or 2, wherein the base material is made of one of metal, resin, paper, fiber, cloth, and rubber.

5. The method for producing a base member-containing rubber member according to claim 1, wherein a molding temperature in a step before the rubber material is poured into the mold in advance is about 10 to 180.

[6] A rubber member with a base material produced by the production method according to any one of claims 1 to 5.

[7] A rubber member containing a base material, which is a packing for a fuel cell manufactured by the manufacturing method according to any one of claims 1 to 5.