JP2007016861A - Method for manufacturing wire netting-rubber composite material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a wire netting-rubber composite material in which the wire-netting and rubber are integrated without causing sideslip of the wire of the wire-netting even by flow of rubber in the process of pressure molding. <P>SOLUTION: A wire netting sheet 1 and a sheet 2 of unvulcanized rubber are superimposed. The superimposed sheet is preliminarily heated and pressed under conditions of temperature and pressure not causing flow of the unvulcanized rubber. Thereafter the sheet is heated at vulcanization temperature, and pressed. In the process, the rubber penetrates and fill the mesh spaces 1b of the wire-netting 1. Thus, the composite material S is obtained in which the wire-netting sheet 1 and the rubber sheet 2 are integrated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a metal mesh used for a cylinder head gasket and various gaskets, a sheet-like sound and vibration isolating material, a dynamic sealing material, etc. interposed between a cylinder block and a cylinder head in an internal combustion engine of an automobile engine. -It is related with the manufacturing method of a rubber composite material.

  Conventionally, a composite material of a core material and rubber has been frequently used as the cylinder head gasket as described above. As an example of such a composite material, as disclosed in Patent Document 1, a metal thin plate, a metal mesh, or an expanded metal having a large number of holes formed on both front and back surfaces is used as a core material, and asbestos is formed on both surfaces of these core materials. Examples include those obtained by pressure-bonding an admixture with rubber. In this patent document 1, in view of the point that a space portion may remain without being able to completely fill the mixture in the hole formed in the metal thin plate or in the mesh space of the wire mesh, the expanded metal is used as the core material. Is adopted.

However, in the course of research on composite materials with a wire mesh as the core material, the unvulcanized rubber sheet and the wire mesh sheet were superimposed, and both sheets were heated and pressure-molded at the rubber vulcanization temperature. It has been found that the wire netting sheet and the rubber sheet are integrated in a state where the rubber is infiltrated and filled in the mesh space, and the phenomenon that the space portion remains without being completely filled with the rubber as described above is eliminated. In addition to plain weaves, various and dense wire meshes such as tatami mats, plain tatami mats, twill weaves, etc. have been developed. The suitability of was re-evaluated.
Japanese Utility Model Publication No. 54-3564

  As described above, when the unvulcanized rubber sheet and the wire mesh sheet are overlapped and both sheets are heated and pressure-molded at the vulcanization temperature of the rubber, the lateral direction in the process of vulcanizing the unvulcanized rubber ( Due to the fluidity in the direction of the surface area), even in the case of a dense wire mesh, rubber penetrates and fills the mesh space, and the phenomenon that the space portion remains is eliminated. There was also a phenomenon in which the wire itself was laterally displaced and unraveled at the end, which sometimes caused a loss of homogeneity in the surface area direction between the wire mesh and the rubber. In this way, if there is an inhomogeneous state due to partial segregation between the wire mesh and rubber, when applied to a gasket, it will bend and have residual stress, which will affect the sealing performance. However, it has not been sufficient for practical use in gaskets, and a drastic improvement in production has been desired.

  The present invention has been made in view of the above circumstances, and a wire mesh / rubber composite in which the wire mesh and the rubber are homogeneously integrated without causing the wire wire of the wire mesh to be laterally shifted by the flow of rubber during heating and pressure molding. It aims at providing the manufacturing method which can obtain material.

  A method for producing a wire mesh / rubber composite material according to the invention of claim 1 is a method of superimposing a wire mesh sheet and an unvulcanized rubber sheet and preliminarily heating at a temperature and pressure at which the unvulcanized rubber does not flow. -A composite material in which a wire mesh sheet and a rubber sheet are integrated in a state where the rubber is infiltrated and filled in the mesh space of the wire mesh sheet by pressurizing and then heating and pressure molding at the vulcanization temperature of the rubber. It is characterized by having obtained.

  In the present invention, as in the invention of claim 2, a region that is preliminarily pressure-biased in the thickness direction can be formed in the wire mesh sheet. Further, as in the third aspect of the invention, a mold that can form a pressure-biased region in the thickness direction is used on the wire netting sheet at the time of heating and pressure molding at the vulcanization temperature of the rubber. Heating and pressurization can also be performed.

  A method for producing a wire mesh / rubber composite material according to the invention of claim 4 is a method of superimposing a wire mesh sheet on which a region preliminarily pressure-biased in the thickness direction and an unvulcanized rubber sheet, By heating and pressing at the vulcanization temperature of the rubber, a composite material in which the metal mesh sheet and the rubber sheet are integrated in a state where the rubber penetrates and fills the mesh space of the metal mesh sheet is obtained. Features.

  The method for producing a wire mesh / rubber composite material according to the invention of claim 5 is a mold in which a wire mesh sheet and an unvulcanized rubber sheet are overlapped to form a pressure-biased region in the thickness direction on the wire mesh sheet. Both sheets were heated and pressure-molded at the rubber vulcanization temperature, and the mesh sheet and the rubber sheet were integrated in a state where the rubber penetrated and filled the mesh space of the mesh sheet. A composite material is obtained.

  In any of the above inventions, as in the invention of claim 6, when heating and press molding at the vulcanization temperature of the rubber, a part of the wire mesh sheet is exposed outside the mold. Heating / pressurizing is performed, or, as in the invention of claim 7, the mold for heating / pressurizing molding at the vulcanization temperature of the rubber is composed of an upper mold and a lower mold. The split surface of the upper mold and the lower mold may be formed by a plane parallel to the pressing direction, and the gap between the split surfaces may be smaller than the wire diameter of the metal wire constituting the wire mesh sheet. it can.

  In the invention of claim 1, the rubber is vulcanized at a temperature and pressure preliminarily heated and pressurized so that the unvulcanized rubber constituting the rubber sheet does not flow, In the previous preliminary heating / pressing, the rubber is viscoelastically deformed and pushed into the mesh space of the wire mesh. The metal mesh sheet is bonded and integrated with each other, and during the subsequent heating and pressure molding at the vulcanization temperature of rubber, the rubber is controlled within the mesh of the metal mesh by controlling to reduce the lateral flow of the rubber. It is possible to integrate the wire netting sheet and the rubber sheet in a state where they are infiltrated and filled. Accordingly, the lateral displacement of the wire mesh wire accompanying the flow of the rubber is reduced, and a homogeneous wire mesh / rubber composite material free from mutual segregation of the wire mesh and the rubber can be obtained. In addition, even in the case of manufacturing a shape having a different amount of rubber on the cross section (a shape in which the rubber thickness is different in the thickness direction), even if a small amount of lateral flow of the rubber occurs, Because of the flow, the lateral displacement of the wire mesh wire is small.

  Further, as in the invention of claim 2, if a region that is preliminarily pressure-biased in the thickness direction is formed in the wire netting sheet, this pressure-bias is applied when heating and pressure-molding at the rubber vulcanization temperature. Since the binding force of the wire mesh is expressed in the reinforced portion, the flow of rubber in the lateral direction is suppressed, and the metal wire of the wire mesh sheet is less likely to be laterally displaced, and a uniform wire mesh without mutual segregation of the wire mesh and rubber. A rubber composite material can be obtained more reliably. Further, as in the invention of claim 3, when heating and pressure molding at the vulcanization temperature of rubber, heating is performed using a mold that can form a pressure-biased region in the thickness direction on the metal mesh sheet.・ If pressurization is performed, the binding force of the wire mesh will be expressed in the pressure-biased part formed at the time of heating and pressure molding, and the segregation between the wire mesh and rubber A more uniform wire mesh / rubber composite can be obtained more reliably.

  In the inventions of claims 4 and 5, the superposed metal mesh sheet and the unvulcanized rubber sheet are directly subjected to the rubber vulcanization temperature without going through the preliminary heating / pressurizing process as described above. Although it is a case where a wire mesh / rubber composite material is obtained by heating and pressure molding, as in the former invention, if a wire mesh sheet in which a region preliminarily pressure-biased in the thickness direction is used, As described above, since the restraint force of the wire mesh is expressed at the pressure-biased portion, the lateral flow of the rubber is suppressed, the metal wire of the wire mesh is less likely to be laterally displaced, and there is no segregation between the wire mesh and the rubber. A homogeneous wire mesh / rubber composite can be obtained. Similarly, in the latter invention, the binding force of the wire mesh is expressed in the pressure-biased portion formed at the time of heating and pressure molding, and there is no segregation between the wire mesh and rubber. A homogeneous wire mesh / rubber composite can be obtained.

  When heating and pressure molding at the vulcanization temperature of the rubber as in the sixth aspect of the invention, if a part of the wire mesh sheet is exposed outside the mold, the wire mesh sheet is in the vicinity of the exposed portion. Therefore, the flow of the rubber is suppressed, so that the metal wire of the wire mesh is less likely to be laterally displaced. In addition, since the air discharge passage is formed by the mesh of the constrained portion and the exposed portion, air accumulation in the cavity during molding hardly occurs, and a dense molded body can be obtained.

  Further, as in the invention of claim 7, the molding die at the time of molding consists of an upper die and a lower die, and a split surface between the upper die and the lower die is formed by a surface parallel to the pressing direction, If the gap of the split surface is smaller than the wire diameter of the metal wire constituting the wire mesh sheet, the metal wire of the wire mesh will not enter the gap even if rubber flows into the gap of the split surface. The wire mesh is not broken at the edge of the molded product. Moreover, the rubber that has flowed into the gap may be removed as a molding burr, and does not cause a deterioration in the quality of the molded product. Thus, by using the invention of claim 6 or claim 7 together with the above-mentioned inventions, a homogeneous wire mesh / rubber composite material without segregation between the wire mesh and the rubber can be obtained more reliably.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a process diagram showing an embodiment of a method for producing a wire mesh / rubber composite material of the present invention, FIGS. 2 (a), (b) and (c) are diagrams for explaining the main part of the embodiment, and FIG. ), (B), and (c) are the same as FIG. 2 showing the same modification, and FIGS. 4 (a), (b), and (c) to FIG. 6 (a), (b), and (c) are FIG. FIG. 7 is a diagram similar to FIG. 1 of another embodiment, FIGS. 8A and 8B are diagrams for explaining the main part of the embodiment, and FIGS. 9A and 9B are FIGS. FIGS. 10A, 10B and 11A, 11B are the same as FIGS. 8A and 8B showing another modification.

  1 and 2, the wire mesh sheet 1 is punched and processed into a desired shape so as to be compatible with a cylinder head gasket or the like (step S1). Next, the metal mesh sheet 1 is degreased with a solvent such as methyl ethyl ketone (step S2), and then the metal mesh sheet 1 is dipped into a heat resistant adhesive and dried at about 50 ° C. to perform a heat resistant adhesive coating process ( Step S3). The wire mesh sheet 1 employed here is a knitted or woven (4 to 300 mesh) metal wire 1a having a wire diameter of 0.04 to 2.0 mm. As the metal wire 1a, stainless steel (SUS301) is used. SUS304, SUS316, etc.), iron wire, zinc iron wire, aluminum wire, copper wire, phosphor bronze wire, nickel wire, monel metal wire and the like are employed. Further, as a form of the wire netting sheet 1, a plain weave, twill weave, tatami mat, plain tatami mat, plain weave, woven weave, etc., or a knot net, a knotless net, a main net, a fork net using these metal wires 1a. Knitted fabrics such as raschel nets, cocoon nets and woven nets are employed.

  On the other hand, in step S4, acrylic rubber, ethylene-acrylic rubber, nitrile rubber, styrene butadiene rubber, isoprene rubber, chloroprene rubber, butadiene rubber, butyl rubber, ethylene-propylene rubber, fluorine rubber, silicone rubber, chlorosulfonated polyethylene rubber, ethylene Rubber materials such as vinyl acetate rubber, polyethylene chloride rubber, epichlorohydrin rubber, natural rubber, rubber chemicals such as anti-aging agent, processing agent, vulcanizing agent, and inorganic filling such as carbon black, silica, clay, calcium carbonate, zeolite An unvulcanized rubber sheet 2 is prepared by preparing a rubber compound material to which a material has been added into a predetermined sheet shape.

  In step S5, the wire netting sheet 1 and the unvulcanized rubber sheet 2 are laminated (superposed), and in step S6, both the sheets 1 and 2 are preheated and pressurized by the hot press device 3. The heating temperature at the time of preheating and pressurization is a temperature at which unvulcanized rubber does not flow, that is, a temperature lower than the vulcanization temperature, and the rubber sheet 2 is made of the rubber material (vulcanization temperature is as described above). 170 to 230 ° C., the temperature is 80 to 100 ° C. In this preheating / pressurizing step, as shown in FIG. 2B, a part of the rubber material of the rubber sheet 2 is pushed into the mesh space 1b of the wire mesh 1 with viscoelastic deformation, The rubber sheet 2 and the wire netting sheet 1 are bonded and integrated with each other by the wedge action. In this pasted and integrated state, a part of the rubber material as shown by a broken line portion 2a in FIG. 2 (b) is not completely penetrated into the mesh space 1b of the wire mesh 1, and is completely in the mesh space 1b. The rubber sheet 2 is still in an unvulcanized state, has no restoring elasticity, and can be peeled off from the wire netting sheet 1.

  Next, in step S7, as shown in FIG. 2 (c), the bonded body of the metal mesh sheet 1 and the rubber sheet 2 is put into the cavity 4c of the molding apparatus 4 composed of the upper mold 4a and the lower mold 4b. Place and heat-press mold. The heating temperature at this time is the vulcanization temperature of the rubber material, that is, 170 to 230 ° C. In this heating and pressure molding process, the rubber of the rubber sheet 2 flows while being vulcanized, and the wire mesh sheet 1 It penetrates deeply so as to be press-fitted into the mesh space 1b, and is vulcanized while being filled in the mesh space 1b. By subsequent demolding, a composite material (molded product) S in which the metal mesh sheet 1 and the rubber sheet 2 are integrated is obtained. When this rubber flows, a force that laterally shifts the metal wire 1a of the wire mesh sheet 1 acts, but in the preheating / pressurizing step (step S6), a part of the rubber is a mesh space 1b of the wire mesh sheet 1. Since it is pushed in, the lateral displacement force is weaker than that in the case of heating and pressure molding without going through step S6. Therefore, a homogeneous wire mesh / rubber composite S without mutual segregation of the wire mesh and rubber. Is obtained. If this is applied to a cylinder head gasket or the like, the sealing properties and durability are excellent, and the elasticity inherent in the rubber material and the wire mesh is synergistic, and the suitability is dramatically improved. As shown in FIG. 2C, the cavity 4c in the molding apparatus 4 is desirably shaped so that the edge of the wire netting sheet 1 is covered with the flowing rubber.

  Note that the adhesive treatment / drying step in step S3 is desirably employed in order to achieve a strong integration between the wire netting sheet 1 and the rubber sheet 2, but in the heating / pressing step in step S7, the rubber is used in the wire netting sheet. Since the metal mesh sheet 1 and the rubber sheet 2 are united so as to be intertwined with each other in a state of penetrating deeply into the mesh space 1b of the one, and being filled in the mesh space 1b, the bonding strength is large. Depending on the purpose of use, it is possible to omit this adhesive treatment / drying step. Further, after the wire netting sheet 1 is punched into a desired shape (step S1), the subsequent process is executed. However, both sheets 1 and 2 are integrated as they are according to the process of steps S2 to S7 to obtain a composite. After obtaining S, it is also possible to punch into a desired shape. In this case, since the wire netting sheet 1 is fixed by vulcanized rubber, the metal wire does not fall apart from the end face of the punched portion, and the metal wire is not exposed on the end face. Therefore, the handling at the time of manufacture becomes easy. Furthermore, it is also possible to punch into a desired shape between step S6 and step S7. Any one of these punching processes can be used together. For example, a hole is formed only in the wire mesh sheet 1 in step S1, and another hole or molding is performed after step S6 and / or after step S7. For example, it is possible to punch a peripheral portion of the product, or to punch a hole having a desired shape simultaneously with the formation of a step or a bead portion around the hole.

  FIG. 3 shows a case where a wire netting sheet 1 in which a region 1c preliminarily pressure-biased in the thickness direction is used. That is, the region 1c is formed by pressure biasing so as to crush the mesh structure of the metal mesh sheet 1 by an appropriate pressing device, and the mesh structure is denser than other parts. Also when using such a wire netting sheet 1, the steps S1 to S6 in FIG. 1 are performed in the same manner. In the step S7, the upper mold 4a corresponds to the region 1c on the surface on the cavity 4c side. The heating / pressure molding process similar to the above is executed by the molding apparatus 4 having the projecting portion 4d at the part to be performed. In this case, the rubber sheet 2 and the wire netting sheet are strongly compressed at the site where the protrusion 4d is formed. However, since the mesh structure in the region 1c is dense, the restraining force suppresses the fluidity of the rubber in the lateral direction. Combined with the above-described operation and effect of the preheating / pressurizing step of Step S6, the function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is more effectively expressed. Since other configurations are the same as described above, common portions are denoted by the same reference numerals, and descriptions thereof are omitted.

  FIG. 4 shows an example in which a region 1d that is pressure-biased in the thickness direction is formed in the wire netting sheet 1 in the heating / pressure molding process in Step 7. That is, the wire netting sheet 1 that is not subjected to pressure biasing as in the case of FIG. 2 is used, and steps S1 to S6 are performed in the same manner as described above. In the process of step S7, the heating / pressure molding process similar to the above is performed by the molding apparatus 4 in which the upper mold 4a has the protrusion 4e on the surface on the cavity 4c side. In this protrusion 4e, the vertical width of the cavity 4c formed between the lower mold 4b is narrowed, so that the metal mesh sheet 1 is strongly compressed together with the rubber sheet 2, and the mesh structure of the metal mesh sheet 1 is crushed. In this way, the pressure is biased, and the pressure-biased region 1d is formed as shown in the figure. Accordingly, in this region 1d, the network structure is densified in the same manner as described above, and the fluidity in the lateral direction of the rubber is suppressed by the restraining force. Thus, the function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is more effectively expressed. Since other configurations are the same as described above, common portions are denoted by the same reference numerals, and description thereof is omitted here.

  FIG. 5 shows heating and pressure molding in the heating / pressure molding process of step S7 such that a part of the wire mesh sheet 1 is exposed outside the molding dies 4a, 4b of the molding device 4. An example is shown. That is, as shown in FIG. 5 (a), the unvulcanized rubber sheet 2 is smaller than the wire netting sheet 1, and the cavity 4c is formed in the rubber sheet 2 in the heating / pressure molding process of step S7. Is used, and a molding apparatus 4 having a structure in which a part of the metal mesh sheet 1 is exposed outside the molding dies 4a and 4b is used. Then, the split surfaces 4f and 4g opposed to the upper and lower sides on one side of the molding dies 4a and 4b have a space smaller than the thickness of the wire mesh sheet 1, and a part of the wire mesh sheet 1 is part of the split surface 4f, It is designed to be sandwiched between 4 g.

  Accordingly, in the heating / pressure molding process of step S7, the rubber flows in the cavity 4c while being vulcanized, and penetrates deeply so as to be press-fitted into the mesh space 1b of the wire mesh sheet 1, In a state where the mesh space 1b is filled, a composite material (molded product) S in which the wire mesh sheet 1 and the rubber sheet 2 are integrated is obtained. At this time, a part of the wire mesh sheet 1 is sandwiched and restrained between the split surfaces 4f and 4g, so that the lateral displacement of the metal wire 1a of the wire mesh sheet 1 due to the lateral flow of rubber is prevented. Therefore, in the same manner as described above, the function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is more effectively expressed in combination with the above-described operation / effect of the preheating / pressurizing step of Step S6. Further, the air in the cavity 4c is discharged through the mesh space 1b in the sandwiched portion, and the cavity 4c is held at a high pressure by the fluid pressure of the rubber flowing in the wire mesh sheet 1. Air accumulation does not occur, and a dense composite material useful for gaskets and the like can be obtained. Further, if the gap between the split surfaces 4f and 4g is set to such a size that the metal sheet 1 is pressure-biased during pressure molding, the same effect as in the example of FIG. 4 can be added. Since other configurations are the same as described above, common portions are denoted by the same reference numerals, and description thereof is omitted here.

  In FIG. 6, the split surfaces 5d and 5e at the periphery of the cavity 5c in the upper mold 5a and the lower mold 5b of the molding apparatus 5 used in the heating and pressure molding process of step S7 are formed in a plane parallel to the pressing direction. In this example, the gap d between the split surfaces 5d and 5e is smaller than the wire diameter D of the metal wire 1a constituting the wire netting sheet 1. Also in this example, the preheating / molding process of steps S1 to S6 is performed in the same manner as in the example of FIG. 2, but in the heating / pressure molding process of step S7, the molding apparatus 5 is used. Heating and pressure molding. Therefore, even if a force that laterally shifts the metal wire 1a of the wire netting sheet 1 acts due to the lateral flow of rubber in the cavity 5c, the metal wire 1a does not enter the gap d, and the metal wire 1a. In the same manner as described above, the function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is more effectively expressed in combination with the above-described operation and effect of the preheating / pressurizing step of Step S6. Since other configurations are the same as described above, the same reference numerals are assigned to the common portions, and the description thereof is omitted.

  The example shown in FIG. 5 or FIG. 6 can be used in combination with the example shown in FIG. 3 or FIG. 4, and a wire mesh / rubber composite material with more excellent characteristics can be obtained from the synergistic effect of the combined use. .

  The example shown in FIG.7 and FIG.8 shows 2nd embodiment of this invention, The metal-mesh sheet | seat 1 piled up without passing through the preheating and pressurization process (step S6) in said 1st embodiment. And the unvulcanized rubber sheet 2 are directly heated and pressure-molded at the rubber vulcanization temperature in the heating and pressure molding process of step S7 to obtain a composite material (molded product) S of wire mesh and rubber. As in the example of FIG. 3, the wire mesh sheet 1 in which the region 1c preliminarily pressure-biased in the thickness direction is used is used. In the case of this example, the action and effect of the preheating / pressurizing step of step S6 in the first embodiment is not added, but the fluidity of the rubber in the lateral direction is suppressed by the restraining force of the pressure-biased region 1c. The function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is exhibited. Since the other configuration is the same as that of the example of FIG. 3, the same reference numerals are given to the common parts and the description thereof is omitted.

  The example shown in FIG. 9 has the same basic configuration as the example shown in FIG. 8, but in the heating / pressure molding process in step 7, the region that is pressure-biased in the thickness direction in the wire netting sheet 1 as in the example of FIG. It is characterized in that 1d is formed. Accordingly, in this example as well, the action and effect of the preheating / pressurizing step of step S6 in the first embodiment is not added, but the fluidity of the rubber in the lateral direction by the restraining force of the pressure-biased region 1d. Is suppressed, and the function of preventing the lateral displacement of the metal wire 1a of the wire netting sheet 1 is exhibited. Since the other configuration is the same as that of the example of FIG. 4, the same reference numerals are given to the common parts and the description thereof is omitted.

  The example shown in FIG. 10 is the same as the example shown in FIG. 8 in the same manner as described above. However, in the heating / pressure molding process in step 7, a part of the wire netting sheet 1 is molded in the same manner as in the example of FIG. A part of the metal mesh sheet 1 is sandwiched between the split surfaces 4f and 4g facing up and down so as to be exposed to the outside of the molding dies 4a and 4b of the apparatus 4 so as to perform heating and pressure molding. It is characterized by the points. Accordingly, even in this example, the action / effect of the preheating / pressurizing step in step S6 in the first embodiment is not added, but a part of the wire netting sheet 1 is sandwiched and restrained between the split surfaces 4f and 4g. Therefore, the lateral displacement of the metal wire 1a of the wire netting sheet 1 accompanying the lateral flow of rubber is also prevented. Further, the air in the cavity 4c is discharged through the mesh space 1b in the sandwiched portion, and the cavity 4c is held at a high pressure by the fluid pressure of the rubber flowing in the wire mesh sheet 1. Air accumulation does not occur, and a dense composite material useful for gaskets and the like can be obtained. Since the other configuration is the same as that of the example of FIG. 5, the same reference numerals are given to the common parts and the description thereof is omitted.

  The example shown in FIG. 11 has the same basic configuration as the example of FIG. 8 as described above, but, like the example of FIG. 6, the upper mold 5a of the molding apparatus 5 used in the heating / pressure molding process of step S7. Further, the split surfaces 5d and 5e at the peripheral edge of the cavity 5c in the lower mold 5b are formed as surfaces parallel to the pressing direction, and the gap d between the split surfaces 5d and 5e is the wire diameter of the metal wire 1a constituting the wire netting sheet 1. It is characterized in that it is smaller than D. Therefore, also in this example, the action / effect by the preheating / pressurizing step of step S6 in the first embodiment is not added, but the metal wire 1a of the wire netting sheet 1 is formed by the rubber flow in the cavity 5c. Even if a force for lateral displacement is applied, the metal wire 1a does not enter the gap d, and the metal wire 1a is prevented from being unwound. Since the other configuration is the same as that of the example of FIG. 6, the same reference numerals are given to the common parts and the description thereof is omitted.

  Note that it is possible to use the example of FIG. 10 or FIG. 11 and the example of FIG. 8 or FIG. Moreover, the metal mesh / rubber composite material obtained by the production method of the present invention is not limited to the cylinder head gasket, but can be applied to various gaskets, sheet-like soundproof and vibration-proof materials, dynamic seal materials and the like for internal combustion engines.

It is process drawing which shows one Embodiment of the manufacturing method of the metal-mesh and rubber composite material of this invention. (A) (b) (c) is a figure explaining the principal part of the embodiment. (A) (b) (c) is the same figure as FIG. 2 which shows the modification. (A) (b) (c) is a figure similar to FIG. 2 which shows another modification. (A) (b) (c) is a figure similar to FIG. 2 which shows another modification. (A) (b) (c) is a figure similar to FIG. 2 which shows another modification. It is the same figure as FIG. 1 of another embodiment. (A) (b) is a figure explaining the principal part of the embodiment. (A) (b) is the same figure as FIG. 8 which shows the modification. (A) (b) is a figure similar to FIG. 8 which shows another modification. (A) (b) is a figure similar to FIG. 8 which shows another modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire mesh sheet 1a Metal wire 1b Mesh space 1c Pressure-biased area 1d Pressure-biased area 2 Unvulcanized rubber sheet 4a Upper die (molding die)
4b Lower mold (molding mold)
5a Upper mold (molding mold)
5b Lower mold (molding mold)
5d Split surface 5e Split surface d Split surface gap D Metal wire diameter S Molded product (composite material)

Claims (7)

  A metal mesh sheet and an unvulcanized rubber sheet are overlapped, preliminarily heated and pressurized at a temperature and pressure at which the unvulcanized rubber does not flow, and then heated and pressurized at the rubber vulcanization temperature. Fabrication of a wire mesh / rubber composite material obtained by molding to obtain a composite material in which a wire mesh sheet and a rubber sheet are integrated while rubber penetrates and fills the mesh space of the wire mesh sheet. Method. In the manufacturing method of the wire mesh and rubber composite material according to claim 1,
A method for producing a wire mesh / rubber composite material, wherein a region biased in the thickness direction in advance is formed in the wire mesh sheet. In the manufacturing method of the wire mesh and rubber composite material according to claim 1,
When heating and press molding at the rubber vulcanization temperature, heating and pressurization was performed using a mold that can form a pressure-biased region in the thickness direction on the wire mesh sheet. A method for producing a wire mesh / rubber composite material.   The wire mesh sheet on which the region biased in the thickness direction in advance was overlapped with the unvulcanized rubber sheet, and both sheets were heated and pressure-molded at the vulcanization temperature of the rubber, A method for producing a wire mesh / rubber composite material, characterized in that a composite material in which a wire mesh sheet and a rubber sheet are integrated in a state in which rubber is infiltrated and filled in a mesh space is obtained.   The metal mesh sheet and the unvulcanized rubber sheet are overlapped, and both sheets are heated at the vulcanization temperature of the rubber using a mold that can form a pressure-biased region in the thickness direction on the metal mesh sheet. A metal mesh / rubber composite material obtained by compression molding to obtain a composite material in which a metal mesh sheet and a rubber sheet are integrated in a state where rubber is infiltrated and filled in the mesh space of the metal mesh sheet Manufacturing method. In the manufacturing method of the wire mesh / rubber composite material according to any one of claims 1 to 5,
A metal mesh / rubber composite characterized in that when heating / pressure molding at the vulcanization temperature of the rubber, heating / pressurization is performed such that a part of the metal mesh sheet is exposed outside the mold. A method of manufacturing the material. In the manufacturing method of the wire mesh / rubber composite material according to any one of claims 1 to 5,
The mold for heating and pressure molding at the vulcanization temperature of the rubber consists of an upper mold and a lower mold, and a split surface between the upper mold and the lower mold is formed by a plane parallel to the pressing direction, A method for producing a wire mesh / rubber composite material, characterized in that the gap between the split surfaces is smaller than the wire diameter of the metal wire material constituting the wire mesh sheet.

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