WO2023286287A1 - 成型方法 - Google Patents
成型方法 Download PDFInfo
- Publication number
- WO2023286287A1 WO2023286287A1 PCT/JP2021/026896 JP2021026896W WO2023286287A1 WO 2023286287 A1 WO2023286287 A1 WO 2023286287A1 JP 2021026896 W JP2021026896 W JP 2021026896W WO 2023286287 A1 WO2023286287 A1 WO 2023286287A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive
- groove
- base material
- cavity plate
- rubber
- Prior art date
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 79
- 239000000463 material Substances 0.000 claims abstract description 111
- 239000000853 adhesive Substances 0.000 claims abstract description 74
- 229920001971 elastomer Polymers 0.000 claims abstract description 74
- 230000001070 adhesive effect Effects 0.000 claims abstract description 72
- 239000003566 sealing material Substances 0.000 claims abstract description 53
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 30
- 238000000576 coating method Methods 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 23
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000000123 paper Substances 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 abstract description 31
- 239000000758 substrate Substances 0.000 abstract description 15
- 238000011109 contamination Methods 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 description 24
- 238000002347 injection Methods 0.000 description 15
- 239000007924 injection Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000004132 cross linking Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 238000001721 transfer moulding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/108—Special methods for making a non-metallic packing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/02—Transfer moulding, i.e. transferring the required volume of moulding material by a plunger from a "shot" cavity into a mould cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C2045/14459—Coating a portion of the article, e.g. the edge of the article injecting seal elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a molding method for molding a sealing material on a base material.
- FIG. 6 is a cross-sectional view of a molding machine 1000 that performs conventional transfer molding. is a diagram showing a state in which mold clamping and injection of the rubber fabric 1050 have been performed.
- the molding machine 1000 has hot plates 1010 and 1012 and molds 1020 and 1032 .
- the mold 1020 has a pot 1022 into which the rubber cloth 1050 is charged, a groove 1026 for molding the sealing material on the base material 1040, and a gate 1024 for injecting the rubber cloth 1050 into the groove 1026.
- Mold 1032 has a recess 1033 for placing substrate 1040 .
- the molding machine 1000 After charging the rubber fabric 1050 and arranging the base material 1040, the molding machine 1000 applies a pressure of, for example, 1 MPa to 200 MPa (hereinafter referred to as injection pressure) to the rubber fabric 1050 by mold clamping, and injects the rubber fabric 1050 into the groove 1026. (inject.
- the molding machine 1000 molds a sealing material on a base material 1040 such as a separator by cross-linking a rubber fabric 1050 with heat of, for example, 80° C. to 220° C. generated by a hot plate 1010 .
- Patent Document 1 discloses a method of manufacturing a gasket-integrated plate used for separators of fuel cells, top covers of hard disk drives, and the like. Further, in some cases, an adhesive or a pressure-sensitive adhesive is applied in advance to the portion of the base material where the sealing material is to be molded to improve the adhesion between the base material and the sealing material.
- the present invention has been made in view of the above circumstances, and an exemplary object of the present invention is to provide a molding method capable of reducing contamination of a base material by an adhesive or pressure-sensitive adhesive.
- the present invention has the following configuration.
- a molding method for molding a sealing material on a base material a first step of injecting the raw material into the groove at a temperature at which the raw material is not crosslinked into a first mold having a groove into which the raw material of the sealing material is injected; a second step of applying an adhesive or adhesive to the surface of the raw material injected into the groove of the first mold; The base material is sandwiched between the first mold and the second mold in which the adhesive or the pressure sensitive adhesive is applied to the surface of the raw material, and the adhesive or the pressure sensitive adhesive is applied at a temperature at which the raw material is crosslinked. a third step of molding the raw material on the base material as the sealing material via an adhesive; Prepare.
- FIG. 4 is a cross-sectional view showing the main part of the molding machine in the vulcanization molding process of the embodiment, (a) a diagram showing a state in which a pair of cavity plates and a base material are arranged in the molding machine, and (b) a plurality of molds in the molding machine.
- FIG. 1 A diagram showing a state in which a pair of cavity plates and a base material are arranged, (c) a cross-sectional view showing the base material after molding, and (d) a diagram showing a state in which the inner region of the base material is sealed with a plate.
- FIG. 4 is a view showing the configuration of the cavity plate of the embodiment, (a) a view showing a surface of the cavity plate provided with grooves, (b) a cross-sectional view taken along line AA of (a), (c) (a) Perspective view in the BB arrow cross section (a) Cross-sectional view of the main part showing the cavity plate after the preforming step of the embodiment, (b) Cross-sectional view of the main part showing the cavity plate in which the adhesive or pressure-sensitive adhesive is applied to the rubber material injected into the grooves in the coating step.
- FIG. 1 a cross-sectional view of the main part showing the state in which the base material is sandwiched between the cavity plate and the mold in the vulcanization molding process, (d) a main part showing the base material with the sealing material molded after the vulcanization molding process.
- sectional view (a) Top view of main parts showing the configuration of the coating device in the coating process of the embodiment, (b) Front view of the main parts showing the coating operation by the coating device It is a cross-sectional view of a conventional molding machine, (a) a diagram showing a state in which rubber dough is charged into a pot of the molding machine, (b) a state in which mold clamping and rubber dough injection are performed in the molding machine. diagram showing
- molding refers to the process of shaping rubber without cross-linking, regardless of the use of a mold. refers to the process of making
- the sealing material is rubber
- the material of the rubber fabric is blended and kneaded.
- the rubber used include fluororubber, EPDM, NBR, CR, thermosetting elastics such as silicone, thermoplastic elastics, and thermoplastic resins.
- the kneaded material is then forced into.
- forcing refers to adding a vulcanization accelerator and a vulcanizing agent to a rubber compound and mixing and kneading them.
- the rubber compound (rubber fabric) is also the state in which the raw material rubber and compounding agents such as fillers and cross-linking agents (vulcanizing agents) are uniformly mixed.
- the rubber material is injected (injected) into the grooves of the cavity plate, which will be described later, under a predetermined pressure, and is molded as it is unvulcanized (uncrosslinked). done.
- a step in which molding is performed in an unvulcanized (uncrosslinked) state is referred to as a preforming step.
- vulcanization is performed in a state in which the cavity plate and the base material, in which rubber is injected, are laminated to form a pair.
- a process in which vulcanization (crosslinking) is performed is referred to as a vulcanization molding process.
- the vulcanization molding step also includes the case where the raw material of the sealing material is molded into the base material at a temperature at which the material is vulcanized (crosslinked).
- FIG. 1 is a cross-sectional view showing a molding machine 100 in the preforming process of the present embodiment
- FIG. FIG. 4B is a diagram showing a state in which the rubber material is inserted
- FIG. 4B is a diagram showing a state in which the rubber material 150 is injected into the groove 162 of the cavity plate 160 in the molding machine 100.
- FIG. 1 the vertical direction is indicated by a double arrow. 1 to 3, for the sake of explanation, the substrate is assumed to be a flat plate, and the cavity plate 160 whose shape is determined according to the substrate is also assumed to be a flat plate.
- the molding machine 100 has hot plates 110, 112 and molds 120, 130.
- the mold 120 has a pot 122 into which the rubber dough 150 is charged and a gate 124 for injecting the rubber dough 150 into the groove 162 of the cavity plate 160 .
- the mold 130 has a recess 133 for arranging the cavity plate 160 .
- a cavity plate 160 which is a first mold, has grooves 162 into which the rubber material 150 is injected, grooves (hereinafter referred to as escape grooves) 164 for releasing the rubber material 150 from the grooves 162 in the preforming process or the vulcanization molding process. have.
- the cavity plate 160 also has a connection groove (not shown), which will be described later.
- the rubber dough 150 is loaded into the pot 122, and the cavity plate 160 is placed in the recess 133 of the mold 130. It is assumed that the die 120 (the gate 124) and the die 130 (the groove 162 of the cavity plate 160) are positioned by a known method or the like. Thereafter, as shown in FIG. 1B, pressure (hereinafter also referred to as mold clamping pressure) is applied to the molds 120 and 130 to clamp the molds, and the rubber fabric 150 is injected from the pot 122 through the gate 124. A pressure is applied to inject the rubber cloth 150 into the groove 162 of the cavity plate 160 .
- mold clamping pressure pressure
- the pressure required when injecting the rubber fabric 150 is called injection pressure, which is, for example, 1 to 200 MPa.
- injection pressure which is, for example, 1 to 200 MPa.
- the temperature of the heat generated in the hot plates 110 and 112 during mold clamping shown in FIG. It is the temperature at which (the substance used as the raw material of the sealing material is not crosslinked) and the fluidity is maintained.
- the preforming step is performed at a temperature of 80°C.
- the preforming step can be called an unvulcanized forming step.
- the temperature in the preforming step is not limited to 80° C., and is set according to the viscosity of the rubber dough 150, for example.
- the filling rate of the rubber fabric 150 into the grooves 162 of the cavity plate 160 is, for example, 90% to 110%, but the filling rate is not limited to this value either.
- FIG. 2 is a cross-sectional view showing the essential parts of the molding machine 200 in the vulcanization molding process of the present embodiment.
- FIG. (b) is a diagram showing a state in which a plurality of pairs (for example, three pairs) of cavity plates 160 and substrates 140 are arranged in the molding machine 200;
- (c) is a cross-sectional view showing the substrate 140 after molding;
- (d) is a diagram showing a state in which the plate 180 seals the inner region of the base material 140.
- the reference numerals are omitted.
- the molding machine 200 has hot plates 210 and 212 and a second mold 222 (hereinafter simply referred to as mold 222).
- the base material 140 is metal, resin, or paper, for example.
- the substrate 140 has a surface 142 on which the sealing material 172 is molded and a surface 144 opposite to the surface 142 .
- the surface 142 of the substrate 140 is fitted with the cavity plate 160 having the grooves 162 filled with the rubber material 150 in the preforming process, and the mold 222 is fitted with the surface 144 . That is, the base material 140 is sandwiched between the mold cavity plate 160 and the mold 222 . It is assumed that the cavity plate 160 (the groove 162 filled with the rubber fabric 150) and the base material 140 are positioned by a known method or the like.
- the temperature at which the rubber fabric 150 is vulcanized (cross-linked) (the raw material of the sealing material is cross-linked), for example, 120° C. to 220° C. is heated by hot plates 210 and 212, and the A pressure (eg 5 MPa) is applied.
- the predetermined pressure does not include the injection pressure but only the mold clamping pressure. In other words, the injection pressure in the vulcanization molding process is 0 MPa.
- the rubber fabric 150 in the groove 162 escapes to the escape groove 164 through a connecting groove (not shown), which will be described later.
- the rubber material 150 in the groove 162 may escape to the escape groove 164 during the preforming process.
- FIG. 2(a) is an example in which the vulcanization molding process is performed with a pair of the cavity plate 160 and the base material 140 as one pair, but it is not limited to this.
- three pairs of the cavity plate 160 and the base material 140 may be molded in a single vulcanization molding process to form a plurality of pairs.
- the cavity plate 160 is on the top and the base material 140 is on the bottom, but the top and bottom may be reversed. When turned upside down, the mold 222 becomes an upper mold.
- the rubber material 150 injected into the groove 162 of the cavity plate 160 is transferred (molded) to the surface 142 of the base material 140 as the sealing material 172.
- the sealing material 172 seals the inner area. Gas, liquid, or the like, for example, is retained in the sealed area.
- the vulcanized (cross-linked) part of the rubber fabric 150 that escapes into the escape groove 164 is hereinafter referred to as a side lip 174 .
- the sealing material 172 is provided on the surface 142 of the base material 140, but the sealing material 172 is provided on the surface 144 of the base material 140 and both surfaces (surfaces 142 and 144) of the base material 140. may be provided.
- FIG. AA sectional view (c) is a perspective view in the BB arrow cross section of (a).
- the cavity plate 160 has grooves 162 , escape grooves 164 and connecting grooves 166 .
- the groove 162 is a groove into which the rubber fabric 150 is injected as described above.
- the base material 140 has a rectangular shape with two long sides and two short sides, and the sealing material is molded along the edges of the base material 140 to form a rectangular frame. .
- the groove 162 of the cavity plate 160 is also formed in a rectangular frame shape.
- the groove 162 has a predetermined depth D1 (see FIG. 3(c)).
- the depth D1 of the groove 162 also determines the height of the sealing material molded into the substrate 140.
- the position of the base material 140 and the length and width of the sealing material to be molded are determined according to the intended use of the base material 140 and/or the sealing material. It is not limited to the shape shown.
- the escape groove 164 is provided parallel to the groove 162 with a space therebetween, but it does not have to be parallel.
- the escape groove 164 is formed by the surplus rubber when the rubber material 150 injected into the groove 162 in the vulcanization molding process (or the preforming process) expands during heating and exceeds the volume of the groove 162 to become surplus. It is a groove for escape. That is, by providing the escape groove 164, it is possible to suppress the generation of burrs after the vulcanization molding process.
- the escape grooves 164 are provided between the grooves 162 and the four sides (ends) of the cavity plate 160.
- the escape groove 164 is provided continuously and has a rectangular frame shape like the groove 162 .
- the relief grooves 164 may be provided discontinuously.
- the escape groove 164 is provided at a position that does not interfere with the purpose of using the base material 140 molded with the sealing material 172 .
- the base material 140 on which the sealing material 172 is molded using the cavity plate 160 of FIG. Material 172 is molded.
- an escape groove 164 is provided at a position corresponding to an area outside the sealing material 172 (that is, the edge of the base material 140) where it is not required to maintain hermeticity.
- the escape groove 164 has a predetermined depth D2 (see FIG. 3(c)).
- the depth D2 of the relief groove 164 also determines the height of the side lip 174 .
- the depth D2 of the escape groove 164 is shallower than the depth D1 of the groove 162 (D2 ⁇ D1).
- the height of the side lip 174 is lower than the height of the sealing material 172 .
- the depth D2 of the escape groove 164 whether it is continuous or discontinuous, and the length, width, shape, etc. in the case of discontinuity are not limited to those shown in FIG. / Or, it may be set according to the purpose of use of the sealing material 172 , the viscosity of the rubber fabric 150 , the injection amount, the injection pressure, and the like.
- the connecting groove 166 is a groove for letting the rubber material 150 expanded by heat in the vulcanization molding process (or preforming process) escape to the escape groove 164 .
- the connecting groove 166 is formed to have a depth d of about 0.005 mm to about 0.2 mm, a length L of about 1 to 6 mm, and to be lower than the touch surface 168, for example.
- length L is the length in the direction parallel to groove 162 .
- the depth d of the connecting groove 166 is shallower than the depth D1 of the groove 162 and the depth D2 of the relief groove 164 (d ⁇ D2 ⁇ D1).
- the connecting grooves 166 are discretely provided between the grooves 162 and the relief grooves 164, as shown in FIG. 3(a).
- the position, the number, the width (in other words, the distance between the groove 162 and the escape groove 164), the length L, and the depth d of the connection groove 166 are determined depending on the purpose of using the base material 140 and/or the sealing material 172 and the grooves. 162 and the escape groove 164, the viscosity of the rubber material 150, the position of the gate 124, and the like.
- the cavity plate 160 As a material for the cavity plate 160, a material that can withstand the vulcanization temperature (hereinafter referred to as vulcanization (crosslinking) temperature) in the vulcanization molding process and has good thermal conductivity, such as iron, SUS, aluminum, etc. Metals such as copper are preferred.
- vulcanization (crosslinking) temperature a material that can withstand the vulcanization temperature
- thermal conductivity such as iron, SUS, aluminum, etc.
- Metals such as copper are preferred.
- the material of the cavity plate 160 for example, ceramics, resins, etc. can be used as long as they satisfy the above conditions.
- the cavity plate 160 has a thickness that prevents deformation and maintains rigidity in the preforming process and the vulcanizing process.
- the volumes of the grooves 162 and the relief grooves 164 of the cavity plate 160 are known values when the cavity plate 160 is designed, the amount of excess rubber can be controlled by the relief grooves 164, thereby reducing the occurrence of burrs. can do. Further, since the rubber material 150 is injected in the preforming process, there is no injection pressure when the rubber material 150 is molded into the base material 140 in the vulcanization molding process. Therefore, deformation and breakage of the base material 140 caused by the injection pressure can be reduced. In addition, since injection pressure is not applied in the vulcanization molding process, it is possible to reduce the amount of pressure that is conventionally added to the mold clamping pressure to suppress the occurrence of burrs.
- gate traces remain in transfer molding, injection molding, etc., for example, in the preforming process of the present embodiment, the unvulcanized rubber material 150 is injected into the grooves 162 of the cavity plate 160, so the gate traces can be reduced or eliminated. can be done.
- FIG. 4(a) is a cross-sectional view of the main part showing the cavity plate 160 after the preforming process described in FIG.
- FIG. 4 is a cross-sectional view of a main part showing a cavity plate 160 to which an adhesive or pressure sensitive adhesive 600 is applied
- FIG. 4(c) is a cross-sectional view of the main part showing a state in which the base material 140 is sandwiched between the cavity plate 160 and the mold 222 in the vulcanization molding process described in FIG. FIG.
- FIG. 11 is a cross-sectional view of a main part showing a base material 140 on which a sealing material 172 is molded after a molding process;
- the adhesive and pressure-sensitive adhesive 600 are drawn to have a thickness for the sake of explanation, but the actual thickness of the adhesive 600 is, for example, 0.01 to 200 ⁇ m.
- the cavity plate 160, the base material 140, and the like have the same configurations as those described with reference to FIGS. 1 to 3, and some parts are omitted in FIG.
- the rubber 150, the sealing material 172, and the side lip 174 are indicated by grid-like hatching.
- the rubber fabric 150 is filled (injected) into the groove 162 of the cavity plate 160 by injection. Although the rubber material 150 does not escape to the escape groove 164 in FIG. 4(a), the rubber material 150 may escape through the connecting groove 166 (see FIG. 3) during the preforming process.
- an application device (not shown) applies an adhesive or adhesive 600 .
- the coating device applies the adhesive or pressure-sensitive adhesive 600 to the cavity plate 160 rather than to the base material 140 .
- the applicator applies a An adhesive or adhesive 600 is applied.
- the adhesive or pressure-sensitive adhesive 600 is applied by replacing the parts above the mold 120 with the application device in a state where the cavity plate 160 is arranged in the molding machine 100 after the preforming step. may be broken. Further, in a state where the cavity plate 160 is arranged in the molding machine 200 before the vulcanization molding process, the coating device applies the adhesive or the pressure-sensitive adhesive 600 before the base material 140 is superimposed on the cavity plate 160 . good too. Further, between the preforming process and the vulcanization molding process, the cavity plate 160 may be removed from the molding machine 100 and applied with the adhesive or pressure-sensitive adhesive 600 in a state where it is placed in a coating device. As shown in FIG. 4(b), the rubber material 150 injected into the grooves 162 of the cavity plate 160 after the preforming process may be coated with the adhesive or the pressure-sensitive adhesive 600, and the method is not limited to the method described above.
- the vulcanization molding process is performed in a state in which an adhesive or adhesive 600 is applied to the rubber material 150 injected into the groove 162 of the cavity plate 160 in FIG. 4(c). As shown in FIG. 4D, the sealing material 172 is transferred (molded) to the base material 140 more firmly by an adhesive or pressure sensitive adhesive 600 .
- a coating device for automatically coating the rubber material 150 injected into the groove 162 of the cavity plate 160 with the adhesive or adhesive 600 will be described.
- coating devices include spray guns, dispensers, coaters, and printers.
- a method such as masking is used to prevent unnecessary application of the adhesive or adhesive 600.
- the printer is, for example, an inkjet printer.
- FIG. 5(a) is a top view of essential parts showing the configuration of the coating device 500 in the coating process
- FIG. 5(b) is a front view of essential parts showing the coating operation of the coating device 500.
- FIG. FIG. 5(b) shows the vertical direction.
- some of the reference numerals described so far are omitted.
- the coating device 500 has a head 510 , a table 520 , rails 512 and 522 and a controller 540 .
- the head 510 has a nozzle 530 below.
- a bottle 610 containing an adhesive or adhesive 600 is placed on the head 510, and the adhesive or adhesive 600 is supplied to the nozzle 530 through a tube (not shown).
- the nozzle 530 is provided with a plurality of holes (not shown) for downwardly ejecting the adhesive or pressure-sensitive adhesive 600 supplied from the bottle 610 .
- Head 510 can move along rail 512 at a predetermined speed. The moving direction of the head 510 is hereinafter referred to as the X direction.
- the table 520 is a table on which the cavity plate 160 that has undergone the preforming process is placed.
- the cavity plate 160 for which the preforming process has been completed is placed on the table 520 so that the rubber fabric 150 faces upward.
- Table 520 can move along rails 522 at a predetermined speed.
- the moving direction of the table 520 is hereinafter referred to as the Y direction.
- the cavity plate 160 is positioned on the table 520 in a known manner and fixed in a known manner so that the cavity plate 160 does not move during movement of the table 520 .
- the control unit 540 has various means for controlling the coating device 500, such as a CPU (not shown), a ROM (not shown), a RAM (not shown), a timer (not shown), a counter (not shown), and the like. ing.
- the control unit 540 controls the position and movement speed of the head 510, the position and movement speed of the table 520, the ejection amount of the adhesive or pressure sensitive adhesive 600 from the nozzle 530, the timing of ejection, etc. by a known method. do.
- the position of the groove 162 of the cavity plate 160 shown in FIG. 3(a) is known when the cavity plate 160 is designed, the positional information of the groove 162 is obtained in advance. Therefore, based on the positional information of the grooves 162 of the cavity plate 160, the application operation of the adhesive or the pressure-sensitive adhesive 600 is controlled by the controller 540 of the application device 500.
- the coating device 500 is an inkjet printer, it is possible to control the position where the adhesive or pressure-sensitive adhesive 600 is applied. For this reason, when an inkjet printer is used as the coating device 600, masking processing and the like are not required, so application by an inkjet printer is preferable.
- the adhesive or adhesive 600 is not particularly limited as long as it is a component that does not react with the cavity plate 160 in the vulcanization molding process.
- the application area of the adhesive or pressure sensitive adhesive 600 may be determined according to the application of the base material 140. For example, if the adhesiveness or adhesiveness of the sealing material 172 is emphasized, the adhesive or pressure sensitive adhesive 600 may be applied so that the area is equal to or larger than the area of the groove 162 shown in FIG. 3A. On the other hand, when the prevention of contamination of the cavity plate 160 and/or the substrate 140 is emphasized, the coating area should be less than the area of the grooves 162 . The same applies to the application amount of the adhesive or adhesive 600 .
- the base material 140 is not contaminated.
- the cavity plate 160 has the relief grooves 164 and the connecting grooves 166.
- the cavity plate may not have the relief grooves and the connecting grooves. Rubber fabric 150 may be injected into 162 .
- the sealing material 172 is formed on the flat base material 140
- the base material 140 may have other shapes.
- it can be applied to a base material having a flange shape at the end, a base material having an uneven shape, or the like.
- the present invention can be applied to molding the sealing material 172 on both sides of the base material 140 .
- the molding method of the present invention is A molding method for molding a sealing material on a base material, a first step of injecting the raw material into the groove at a temperature at which the raw material is not crosslinked into a first mold having a groove into which the raw material of the sealing material is injected; a second step of applying an adhesive or adhesive to the surface of the raw material injected into the groove of the first mold; The base material is sandwiched between the first mold and the second mold in which the adhesive or the pressure sensitive adhesive is applied to the surface of the raw material, and the adhesive or the pressure sensitive adhesive is applied at a temperature at which the raw material is crosslinked. a third step of molding the raw material on the base material as the sealing material via an adhesive; Prepare.
- the first mold may have an escape groove in the vicinity of the groove and separated from the groove.
- the first mold may have a connecting groove that connects the groove and the relief groove.
- the substrate may be metal, resin or paper.
- the sealing material may be rubber.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
前記シール材の原料が注入される溝を有する第1の金型に、前記原料が架橋しない温度で前記溝に前記原料を注入する第1の工程と、
前記第1の金型の前記溝に注入された前記原料の表面に接着剤又は粘着剤を塗布する第2の工程と、
前記原料の表面に前記接着剤又は前記粘着剤が塗布された前記第1の金型と第2の金型との間に前記基材を挟み、前記原料が架橋する温度で前記接着剤又は前記粘着剤を介して前記原料を前記基材に前記シール材として成型する第3の工程と、
を備える。
<シール材付きの基材が完成するまでの流れ>
本実施形態の成型方法の基本的な流れを説明する。シール材が例えばゴムの場合、ゴム生地の材料が配合され混練される。使用されるゴムには、例えば、フッ素ゴム、EPDM、NBR、CR、シリコーン等の熱硬化性弾性体、熱可塑性弾性体、熱可塑性樹脂等が用いられる。次に、混練された材料に促入れが行われる。ここで促入れとは、加硫促進剤、加硫剤をゴムコンパウンドに入れ、混ぜて練ることをいう。なお、原料となるゴムと充填材や架橋剤(加硫剤)等の配合剤が均一に混合された状態もゴムコンパウンド(ゴム生地)という。次に、促入れが行われたゴム生地が分出・成形された後、後述するキャビプレートの溝にゴム生地が所定の圧力で注入(射出)され未加硫(未架橋)のまま成形が行われる。以下の説明において、未加硫(未架橋)のまま成形が行われる工程を予備成形工程という。
第1の工程である予備成形工程について説明する。図1は、本実施形態の予備成形工程における成形機100を示す断面図であり、(a)は成形機100のポット122に、基材に成形されるシール材の原料であるゴム生地150が装入されている状態を示す図、(b)は成形機100においてキャビプレート160の溝162にゴム生地150の注入が行われた状態を示す図である。図1には、上下方向を両矢印で示している。なお、図1~図3では、説明のため基材は平板であるものとし、基材に応じて形状が決定するキャビプレート160も平板であるものとする。
第3の工程である加硫成型工程について説明する。図2は、本実施形態の加硫成型工程における成型機200の要部を示す断面図であり、(a)は成型機200に1対のキャビプレート160及び基材140が配置された状態を示す図、(b)は成型機200に複数対(例えば3対)のキャビプレート160及び基材140が配置された状態を示す図、(c)は成型後の基材140を示す断面図、(d)はプレート180で基材140の内側の領域を密閉した状態を示す図である。図2には、上下方向を両矢印で示している。なお、図2(b)では2対目、3対目は1対目と同じ構成であるため符号を省略している。
キャビプレート160の構成について説明する。図3はキャビプレート160の構成を示す図であり、(a)はキャビプレート160の溝162が設けられている面(以下、タッチ面という)168を示す図、(b)は(a)のA-A断面図、(c)は(a)のB-B矢視断面における斜視図である。キャビプレート160は、溝162、逃がし溝164、連結溝166を有している。
図4を用いて本実施形態の第2の工程である塗布工程を備える成型方法について説明する。図4(a)は、図1で説明した予備成形工程後のキャビプレート160を示す要部断面図であり、(b)は本実施形態の塗布工程において溝162に注入されたゴム生地150に接着剤や粘着剤600が塗布されたキャビプレート160を示す要部断面図である。また、図4(c)は、図2で説明した加硫成型工程において基材140をキャビプレート160と金型222とで挟んだ状態を示す要部断面図であり、(d)は加硫成型工程後のシール材172が成型された基材140を示す要部断面図である。なお、図4では、説明のため接着剤や粘着剤600が厚みを有するように描画しているが、実際には接着剤600の厚みは、例えば0.01~200μmである。また、キャビプレート160、基材140等は、図1~図3で説明した構成と同じ構成であり、図4では符号及び引き出し線を省略している部分もある。さらに、接着剤や粘着剤600を黒で示すため、ゴム150、シール材172、サイドリップ174を格子状のハッチングで示す。
接着剤や粘着剤600を自動でキャビプレート160の溝162に注入されたゴム生地150に塗布する塗布装置について説明する。塗布装置は、例えば、スプレーガン、ディスペンサー、コーター、プリンター等である。なお、塗布装置により接着剤や粘着剤600が不要な領域まで塗布されるおそれがある場合には、接着剤や粘着剤600の不要な塗布を防止するために、例えばマスキング等の方法を用いる場合もある。ここで、プリンターは、例えばインクジェット方式のプリンターである。
接着剤や粘着剤600は、加硫成型工程において、キャビプレート160と反応しない成分であれば特に限定されない。
[趣旨1]
本発明の成型方法は、
基材にシール材を成型する成型方法であって、
前記シール材の原料が注入される溝を有する第1の金型に、前記原料が架橋しない温度で前記溝に前記原料を注入する第1の工程と、
前記第1の金型の前記溝に注入された前記原料の表面に接着剤又は粘着剤を塗布する第2の工程と、
前記原料の表面に前記接着剤又は前記粘着剤が塗布された前記第1の金型と第2の金型との間に前記基材を挟み、前記原料が架橋する温度で前記接着剤又は前記粘着剤を介して前記原料を前記基材に前記シール材として成型する第3の工程と、
を備える。
前記第2の工程において、インクジェット方式の塗布装置により前記接着剤又は前記粘着剤が塗布されてもよい。
前記第1の金型は、前記溝の近傍に前記溝と離間した逃がし溝を有していてもよい。
前記第1の金型は、前記溝と前記逃がし溝とを連結する連結溝を有していてもよい。
前記基材は、金属、樹脂又は紙であってもよい。
前記シール材は、ゴムであってもよい。
110、112、210、212、1010、1012 熱板
120、130、1020、1032 金型
122、1022 ポット
124、1024 ゲート
133、1033 凹部
140、1040 基材
142、144 面
150、1050 ゴム生地
160 キャビプレート
162、1026 溝
164 逃がし溝
166 連結溝
168 タッチ面
172 シール材
174 サイドリップ
180 プレート
222 第2の金型
500 塗布装置
510 ヘッド
512、522 レール
520 テーブル
530 ノズル
540 制御部
600 粘着剤
610 ボトル
Claims (6)
- 基材にシール材を成型する成型方法であって、
前記シール材の原料が注入される溝を有する第1の金型に、前記原料が架橋しない温度で前記溝に前記原料を注入する第1の工程と、
前記第1の金型の前記溝に注入された前記原料の表面に接着剤又は粘着剤を塗布する第2の工程と、
前記原料の表面に前記接着剤又は前記粘着剤が塗布された前記第1の金型と第2の金型との間に前記基材を挟み、前記原料が架橋する温度で前記接着剤又は前記粘着剤を介して前記原料を前記基材に前記シール材として成型する第3の工程と、
を備える、成型方法。 - 前記第2の工程において、インクジェット方式の塗布装置により前記接着剤又は前記粘着剤が塗布される、請求項1に記載の成型方法。
- 前記第1の金型は、前記溝の近傍に前記溝と離間した逃がし溝を有する、請求項1又は請求項2に記載の成型方法。
- 前記第1の金型は、前記溝と前記逃がし溝とを連結する連結溝を有する、請求項1から請求項3のいずれか1項に記載の成型方法。
- 前記基材は、金属、樹脂又は紙である、請求項1から請求項4のいずれか1項に記載の成型方法。
- 前記シール材は、ゴムである、請求項1から請求項5のいずれか1項に記載の成型方法。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0493227A (ja) * | 1990-08-09 | 1992-03-26 | Three Bond Co Ltd | ガスケット複合品の製造方法 |
JP2004225721A (ja) | 2003-01-20 | 2004-08-12 | Nok Corp | ガスケット一体型プレートの製造方法 |
JP2007292274A (ja) * | 2006-03-31 | 2007-11-08 | Nok Corp | ガスケットの製造方法及びインクジェット塗布装置 |
JP2013181551A (ja) * | 2012-02-29 | 2013-09-12 | Kokoku Intech Co Ltd | シール付きプレートの製造方法及びキャビプレート |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0493227A (ja) * | 1990-08-09 | 1992-03-26 | Three Bond Co Ltd | ガスケット複合品の製造方法 |
JP2004225721A (ja) | 2003-01-20 | 2004-08-12 | Nok Corp | ガスケット一体型プレートの製造方法 |
JP2007292274A (ja) * | 2006-03-31 | 2007-11-08 | Nok Corp | ガスケットの製造方法及びインクジェット塗布装置 |
JP2013181551A (ja) * | 2012-02-29 | 2013-09-12 | Kokoku Intech Co Ltd | シール付きプレートの製造方法及びキャビプレート |
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