WO2021132497A1 - Procédé de fabrication de doublure d'aile - Google Patents

Procédé de fabrication de doublure d'aile Download PDF

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Publication number
WO2021132497A1
WO2021132497A1 PCT/JP2020/048525 JP2020048525W WO2021132497A1 WO 2021132497 A1 WO2021132497 A1 WO 2021132497A1 JP 2020048525 W JP2020048525 W JP 2020048525W WO 2021132497 A1 WO2021132497 A1 WO 2021132497A1
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WO
WIPO (PCT)
Prior art keywords
foam layer
tire
fender liner
molding die
internal space
Prior art date
Application number
PCT/JP2020/048525
Other languages
English (en)
Japanese (ja)
Inventor
崇志 ▲高▼田
孝太郎 兒玉
幸宏 藤原
Original Assignee
Ａｇｃ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ａｇｃ株式会社 filed Critical Ａｇｃ株式会社
Priority to JP2021567634A priority Critical patent/JPWO2021132497A1/ja
Priority to CN202080086906.3A priority patent/CN114829237B/zh
Priority to DE112020006369.0T priority patent/DE112020006369T5/de
Publication of WO2021132497A1 publication Critical patent/WO2021132497A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/16—Catalysts
    • C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
    • C08G18/20—Heterocyclic amines; Salts thereof
    • C08G18/2045—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings
    • C08G18/2063—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings having two nitrogen atoms in the condensed ring system
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/18—Parts or details thereof, e.g. mudguard flaps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
    • B62D65/02—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components
    • B62D65/16—Joining sub-units or components to, or positioning sub-units or components with respect to, body shell or other sub-units or components the sub-units or components being exterior fittings, e.g. bumpers, lights, wipers, exhausts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7607—Compounds of C08G18/7614 and of C08G18/7657
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2007/00—Use of natural rubber as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/18—Polymers of nitriles
    • B29K2033/20—PAN, i.e. polyacrylonitrile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2061/00—Use of condensation polymers of aldehydes or ketones or derivatives thereof, as moulding material
    • B29K2061/20—Aminoplasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2079/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain, not provided for in groups B29K2061/00 - B29K2077/00, as moulding material
    • B29K2079/08—PI, i.e. polyimides or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0083—Foam properties prepared using water as the sole blowing agent

Definitions

  • This disclosure relates to a method for manufacturing a fender liner.
  • the fender liner is arranged in a curved shape along the outer circumference of the tires of the vehicle to prevent foreign substances such as pebbles that are flipped up when the vehicle is running from colliding with the vehicle body.
  • the fender liner includes a non-woven fabric and the like, and absorbs the running noise of the vehicle and the collision noise of foreign matter.
  • a method for producing a fender liner generally includes hot press molding of a sheet-shaped fiber web (see, for example, Patent Document 1).
  • the conventional fender liner contains a non-woven fabric, and the non-woven fabric contains two-dimensionally oriented fibers. Therefore, the vibration characteristics of the fibers differed depending on the direction, and the sound absorption coefficient was low.
  • One aspect of the present disclosure provides a technique for improving the sound absorption of a fender liner.
  • the fender liner manufacturing method has the following (A) to (F).
  • A) Close a plurality of split molds constituting the molding mold.
  • B) The resin composition is injected into the closed internal space of the molding mold from the injection port of the molding mold.
  • C) The resin composition is foamed in the internal space of the molding die.
  • D) The foamed resin composition is solidified to obtain the foam layer.
  • E) Open a plurality of the split molds.
  • the foam layer is taken out from the opened molding die.
  • the foam layer is arranged in a curved shape along the outer circumference of the tire of the vehicle and is used as a fender liner.
  • the sound absorption of the fender liner can be improved.
  • FIG. 1 is a diagram showing a lower structure of a vehicle on which a fender liner according to an embodiment is mounted.
  • FIG. 2 is a flowchart showing a method of manufacturing a fender liner according to an embodiment.
  • FIG. 3 is a cross-sectional view showing an example of S102 of FIG.
  • FIG. 4 is a cross-sectional view of the molding die taken along the line IV-IV of FIG.
  • FIG. 5 is a cross-sectional view showing an example of S105 of FIG.
  • FIG. 6 is a cross-sectional view showing an example of S106 of FIG.
  • FIG. 7 is a cross-sectional view showing an example of S107 of FIG.
  • FIG. 8 is a cross-sectional view showing a modified example of S102 of FIG.
  • FIG. 9 is a cross-sectional view showing a modified example of S105 of FIG.
  • the fender liner 1 will be described with reference to FIG.
  • the white arrow indicates the traveling direction of the vehicle
  • the left side is the front side of the vehicle
  • the right side is the rear side of the vehicle.
  • the fender liner 1 includes a foam layer 11 that is arranged in a curved shape along the outer circumference of the tire 2 of the vehicle.
  • the foam layer 11 prevents foreign matter such as pebbles that are flipped up when the vehicle is running from colliding with the vehicle body 3.
  • the foam layer 11 absorbs the running noise of the vehicle, the collision noise of foreign matter, and the like.
  • the foam layer 11 is obtained by foaming and solidifying the resin composition in the internal space 56 of the molding die 5 shown in FIG. 3 and the like as described later.
  • the foam layer 11 has a three-dimensional network-like skeleton.
  • the foam layer 11 has a large number of bubbles inside. Many bubbles are connected to each other, and sound waves propagate inside them.
  • the foam layer 11 While the conventional non-woven fabric contains fibers that are two-dimensionally oriented, the foam layer 11 has a net-like skeleton that is three-dimensionally stretched. Therefore, the foam layer 11 can improve the sound absorption property as compared with the non-woven fabric. Further, since the foam layer 11 has a three-dimensionally stretched net-like skeleton and is continuously connected, the shape retention can be improved.
  • the foam layer 11 is molded to have the same shape and dimensions as the internal space 56 of the molding die 5. Therefore, the foam layer 11 having the same shape and the same dimensions can be mass-produced. Further, since the shape and dimensions of the foam layer 11 are determined by the shape and dimensions of the internal space 56 of the molding die 5, a fine structure can be imparted, and post-processing such as cutting or pressing is not required.
  • the foam layer 11 is, for example, a polyurethane foam.
  • the polyurethane foam is a so-called polyurethane foam, which is obtained by foaming and solidifying a resin composition containing a polyisocyanate, a polyol, a catalyst, and a foaming agent.
  • the foaming agent contains water.
  • the foaming agent may contain chlorine. Details of the resin composition will be described later.
  • the foam layer 11 is a polyurethane foam in the present embodiment, it may be a foam of polyacrylic, melamine, rubber, polyolefin, or polyimide. These materials, including polyurethane, are excellent in light weight and shape retention.
  • the fender liner 1 is arranged inside the tire house 31.
  • the tire house 31 is a space for accommodating the tire 2. Inside the tire house 31, various parts such as a suspension (not shown) are arranged.
  • the suspension connects the wheels of the tire 2 to the vehicle body 3 and absorbs the impact and vibration transmitted from the road surface to the vehicle body 3.
  • the foam layer 11 preferably includes the first foam layer 111 and the second foam layer 112 in order to increase the thickness and enhance the sound absorption while avoiding interference with the tire 2 and the suspension.
  • the second foam layer 112 is arranged on the side opposite to the tire 2 with reference to the first foam layer 111.
  • the first foam layer 111 and the second foam layer 112 are integrally molded in the present embodiment, but may be separately molded and joined.
  • the first foam layer 111 is arranged in a curved shape along the outer circumference of the tire 2 and has a uniform thickness. Therefore, a gap of a certain value or more can be formed between the first foam layer 111 and the tire 2, contact between the foam layer 11 and the tire 2 can be prevented, and damage to the foam layer 11 or the tire 2 can be prevented.
  • the first foam layer 111 is attached to the vehicle body 3 with a pin, a washer, or the like.
  • the second foam layer 112 may be formed so as to cover the entire surface 111a of the first foam layer 111 opposite to the tire 2, but in the present embodiment, it is formed only on a part of 111a.
  • the surface 111a of the first foam layer 111 opposite to the tire 2 is also referred to as an outer peripheral surface 111a of the first foam layer 111.
  • the surface 111b of the first foam layer 111 facing the tire 2 is also referred to as an inner peripheral surface 111b of the first foam layer 111.
  • the second foam layer 112 is formed only on a part of the surface 111a of the first foam layer 111 opposite to the tire 2.
  • a plurality of the second foam layers 112 are arranged, for example, at intervals in the circumferential direction of the tire 2.
  • the thickness of the foam layer 11 is, for example, 3 mm to 25 mm, preferably 3 mm to 20 mm, from the viewpoint of achieving both light weight and sound absorption.
  • the thickness of the first foam layer 111 is, for example, 3 mm to 15 mm, preferably 3 mm to 10 mm.
  • the thickness of the second foam layer 112 is, for example, 10 mm to 15 mm.
  • the density of the foam layer 11 from the viewpoint of compatibility of lightweight and sound-absorbing, for example, 20kg / m 3 ⁇ 120kg / m 3.
  • the density of the foam layer 11 is a so-called bulk density, and is measured in accordance with JIS K7222: 2005 "Foam plastics and rubber-How to obtain the apparent density-".
  • the density of the foam layer 11 is preferably 30 kg / m 3 to 100 kg / m 3 , and more preferably 55 kg / m 3 to 90 kg / m 3 .
  • the sound absorption coefficient of the foam layer 11 is, for example, 0.4 to 1.
  • the sound absorption coefficient of the foam layer 11 is measured in accordance with JIS A1405-2: 2007 "Measurement of sound absorption coefficient and impedance by an acoustic tube" by cutting out a test piece having a thickness of 10 mm and vertically injecting a sound wave of 1000 Hz.
  • the sound absorption coefficient of the foam layer 11 is preferably 0.5 to 1.
  • the running sound of the vehicle includes pattern noise S.
  • the pattern noise S is noise generated from the tread pattern (groove) of the tire 2, and is noise generated when the air trapped between the groove and the road surface is released.
  • the frequency of the pattern noise S is 1000 Hz or its vicinity.
  • the pattern noise S is more remarkable behind the vehicle than the lower end 2a of the tire 2.
  • the drive wheels are wheels that are rotated by a drive source such as an engine or an electric motor.
  • Passive wheels are wheels that rotate passively when the vehicle is running.
  • the second foam layer 112 is arranged behind the vehicle from the lower end 2a of the tire 2 mounted on the drive wheels. All wheels may be drive wheels.
  • the driving force of the driving source is transmitted to the driving wheels via the shaft.
  • the vehicle body 3 is provided with an opening for passing the shaft. Through this opening, noise from the drive source can leak out of the vehicle.
  • This opening may be arranged in front of the vehicle with respect to the lower end 2a of the tire 2.
  • the second foam layer 112 is arranged at least in front of the vehicle from the lower end 2a of the tire 2.
  • the thickness of the foam layer 11 can be increased, and the noise of the drive source can be suppressed from leaking to the outside of the vehicle.
  • the second foam layer 112 may be arranged directly above the lower end 2a of the tire 2.
  • the method for manufacturing the fender liner 1 includes, for example, S101 to S107 of FIG.
  • the temperature of the molding die 5 is controlled.
  • the temperature control of the molding die 5 is continued in the subsequent steps.
  • the temperature control (S101) may be started before the injection (S103). It is sufficient that the temperature of the molding die 5 stabilizes before the injection (S103).
  • the temperature of the molding die 5 is adjusted to 50 ° C to 70 ° C. Inside the molding die 5, a flow path through which a temperature control medium such as water flows is formed. An electric heater or the like may be embedded inside the molding die 5.
  • a temperature difference may be provided between the surface 11b of the foam layer 11 facing the tire 2 and the surface 11a of the foam layer 11 opposite to the tire 2.
  • the temperature of either surface 11a or 11b may be high.
  • the polymerization reaction and the foaming reaction of the resin composition can be adjusted by the temperature difference, and the surface characteristics of the two surfaces 11a and 11b can be adjusted separately.
  • the lower mold 51 and the upper mold 52 constituting the molding mold 5 are closed. Specifically, by moving the upper mold 52 from the mold opening position (see FIG. 6) to the mold closing position (see FIG. 3), the mold 5 is closed.
  • the molding die 5 is divided into a lower die 51 and an upper die 52.
  • the upper mold 52 is arranged above the lower mold 51.
  • the upper mold 52 is further divided into a plurality of split molds 53 to 55.
  • the lower mold 51 and the upper mold 52 are also split molds of the molding mold 5.
  • the boundary line of these split molds is called the dividing line PL of the molding mold 5.
  • an internal space 56 is formed between the lower mold 51 and the upper mold 52.
  • the internal space 56 is a space for molding the foam layer 11.
  • the foam layer 11 is formed to have the same shape and dimensions as the internal space 56.
  • the lower mold 51 is a fixed mold.
  • the lower mold 51 has an upper surface 511 that is convex upward, and has a concave portion 512 on the upper surface 511 thereof.
  • the recess 512 is formed at a constant depth from the upper surface 511 of the lower mold 51. Inside the recess 512, the first foam layer 111 is formed.
  • the upper mold 52 is a movable type.
  • the upper mold 52 has an upper convex lower surface 521, and the lower surface 521 has a concave portion 522.
  • the recess 522 is formed at a constant depth from the lower surface 521 of the upper mold 52. Inside the recess 522, the second foam layer 112 is formed.
  • the number of the second foam layers 112 is a plurality in the present embodiment, it may be one. That is, the number of recesses 522 is plural in this embodiment, but may be one. Further, when the foam layer 11 does not include the second foam layer 112, the recess 522 may be omitted.
  • the upper mold 52 has an upwardly convex arch shape, and is divided into three split molds 53 to 55 in the circumferential direction thereof.
  • the split molds 53 and 55 at both ends are connected to the lower mold 51 by different hinges H1 and H2.
  • the split mold 53 at one end rotates about the hinge H1 and rotates between the mold closed position (see FIG. 3) and the mold open position (see FIG. 6).
  • the split mold 55 at the other end rotates about the hinge H2 and rotates between the mold closed position (see FIG. 3) and the mold open position (see FIG. 6).
  • the intermediate split mold 54 is connected to one of the two split molds 53 and 55 at both ends (for example, the split mold 53) by a hinge H3.
  • the split mold 54 in the middle rotates about the hinge H3, and rotates between the mold closed position (see FIG. 3) and the mold open position (see FIG. 6) with respect to the split mold 53 at one end.
  • the upper mold 52 is divided into three split molds 53 to 55, but it may be divided into two split molds or four or more split molds.
  • the number of divisions of the upper die 52 is not particularly limited.
  • the upper mold 52 is divided into a plurality of split molds 53 to 55.
  • the plurality of split molds 53 to 55 can be moved individually, and the movable range of the upper mold 52 can be reduced as compared with the case where the entire upper mold 52 is moved at once.
  • the resin composition is injected into the internal space 56 of the molding die 5 closed in S102 from the injection port 57 of the molding die 5.
  • the internal space 56 has an upwardly convex arch shape, and the injection port 57 is arranged directly above the uppermost portion thereof.
  • the resin composition enters the internal space 56 from the injection port 57, it is bifurcated and flows down due to gravity.
  • a plug 58 is inserted into the injection port 57 as shown in FIG.
  • the resin composition is foamed in the internal space 56 of the molding die 5.
  • the resin composition swells from both lower ends of the arched interior space 56 toward the top of the center and spreads throughout the interior space 56.
  • the resin composition When the resin composition is foamed, the gas in the internal space 56 of the molding die 5 is extruded to the outside of the molding die 5 via the dividing line PL of the molding die 5. Since the gas escapes in the vicinity of the dividing line PL, the resin composition is likely to collect, bubbles are difficult to grow, and bubbles are easily crushed. As a result, a dense resin that is difficult for sound waves to enter is generated in the vicinity of the dividing line PL.
  • the facing surface 11b of the foam layer 11 with the tire 2 is the inner peripheral surface 111b of the first foam layer 111.
  • the surface 11a of the foam layer 11 opposite to the tire 2 includes the outer peripheral surface 111a of the first foam layer 111 and the outer peripheral surface 112a of the second foam layer 112.
  • the dividing line PL of the molding die 5 is arranged on the outer peripheral surface 111a of the first foam layer 111, for example, as shown in FIG.
  • the dividing line PL of the molding die 5 may be arranged on the outer peripheral surfaces 112a of the second foam layer 112, or may be arranged on both outer peripheral surfaces 111a and 112a.
  • burr B is generated.
  • the dividing line PL of the molding die 5 of the present embodiment is not arranged on the facing surface 11b of the foam layer 11 with the tire 2. Therefore, the burr B does not occur on the surface 11b of the foam layer 11 facing the tire 2. Therefore, interference between the burr B and the tire 2 can be prevented.
  • the resin composition swells from both lower ends of the arched internal space 56 toward the uppermost center. At the site where the resin composition finally gathers, the resin density tends to be lower and the sound wave attenuation constant (unit: Neper / m) is lower than at other sites.
  • the second foam layer 112 is arranged at the uppermost part of the arch-shaped internal space 56.
  • the thickness of the foam layer 11 can be increased, and the decrease in the attenuation constant of sound waves can be compensated for by the thickness.
  • the foamed resin composition is solidified to obtain the foam layer 11. Solidification involves hardening.
  • the foam layer 11 is molded into the same shape and dimensions as the internal space 56 of the molding die 5.
  • the lower mold 51 and the upper mold 52 are opened. Specifically, by moving the upper mold 52 from the mold closing position (see FIG. 3) to the mold opening position (see FIG. 6), the mold 5 is opened.
  • the second foam layer 112 includes a tapered surface 112c that is tapered from the first foam layer 111 toward the side opposite to the tire 2 (outward in the radial direction of the tire 2).
  • the tapered surface 112c is inclined with respect to the radial direction of the tire 2 and is inclined with respect to the lower surface 521 of the upper die 52.
  • the tapered surface 112c makes it easy to remove the second foam layer 112 from the upper mold 52, and damage during mold release can be suppressed.
  • the tapered surface 112c is unnecessary. In this case, the mold is released while deforming the second foam layer 112.
  • the first foam layer 111 includes a tapered surface 111c that is tapered toward the tire 2 side (inward in the radial direction of the tire 2).
  • the tapered surface 111c is inclined with respect to the radial direction of the tire 2 and is inclined with respect to the upper surface 511 of the lower mold 51.
  • the tapered surface 111c makes it easy to remove the first foam layer 111 from the lower mold 51, and damage during mold release can be suppressed.
  • the tapered surface 111c is unnecessary. In this case, the mold is released while deforming the first foam layer 111.
  • the facing surface 11b of the foam layer 11 with the tire 2 is arranged downward in the internal space 56 of the molding die 5.
  • the resin collects downward due to gravity. Since the surface 11b of the foam layer 11 facing the tire 2 is arranged downward, the resin density thereof can be improved and the sound absorption characteristics thereof can be improved.
  • the facing surface 11b of the foam layer 11 with the tire 2 is arranged downward in the internal space 56 of the molding die 5, but as shown in FIG. 9, it may be arranged upward.
  • the molding die 5 may be arranged upside down.
  • 51 is an upper mold and 52 is a lower mold.
  • the injection port 57 is arranged in the upper mold 51.
  • the internal space 56 has a downwardly convex arch shape as shown in FIG.
  • the injection port 57 is arranged directly above the lowermost portion.
  • the resin composition enters the internal space 56 from the injection port 57, it is bifurcated and spreads over the entire internal space 56 against gravity. Therefore, the resin composition gradually spreads from the injection port 57.
  • the merging of the flow tips of the resin composition can be suppressed, and the generation of lines (so-called weld lines) generated by the merging can be suppressed.
  • the resin density increases at the injection port 57. Therefore, when the fender liner 1 is attached to the vehicle body 3, a portion having a high resin density can be arranged at the uppermost portion of the fender liner 1.
  • the resin composition which is the raw material of the foam layer 11 will be described.
  • the resin composition comprises a polyisocyanate, a polyol, a catalyst, and a foaming agent.
  • the resin composition may further contain additives.
  • the resin composition is usually prepared by mixing a system liquid containing a raw material other than polyisocyanate with polyisocyanate.
  • polyisocyanate examples include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), polymethylene polyphenyl isocyanate (commonly known as crude MDI), xylylene diisocyanate (XDI), isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HMDI).
  • TDI diphenylmethane diisocyanate
  • MDI polymethylene polyphenyl isocyanate
  • XDI xylylene diisocyanate
  • IPDI isophorone diisocyanate
  • HMDI hexamethylene diisocyanate
  • the TDI may be either 2,4-TDI or 2,6-TDI, or a mixture.
  • polyol examples include polyoxyalkylene polyol and polyester polyol.
  • Water can be used as the foaming agent, but the foaming agent is not limited to this.
  • an inert compound having a low boiling point is preferable.
  • examples of such an inert compound include an inert gas and a saturated hydrocarbon having a boiling point of 70 ° C. or lower and a carbon number of 8 or less, in which a hydrogen atom bonded to a carbon atom may be replaced with a halogen atom.
  • the halogen atom is, for example, a chlorine atom or a fluorine atom.
  • saturated hydrocarbons examples include butane, pentane, hexane, dichloromethane (methylene chloride), trichloroethane and various chlorofluorocarbon compounds, but are not limited thereto.
  • one type of foaming agent may be used alone, or two or more types may be used in combination.
  • the catalyst is at least one selected from the group consisting of amine-based catalysts and tin-based catalysts.
  • One type of catalyst may be used alone, or two or more types may be used in combination.
  • Examples of the amine-based catalyst include triethylenediamine, bis (2-dimethylaminoethyl) ether, N, N, N', N'-tetramethylhexamethylenediamine, N, N-dimethylaminoethoxyethoxyethanol, N, N.
  • tin-based catalysts include tin 2-ethylhexanoate, di-n-butyltin oxide, di-n-butyltin dilaurate, di-n-butyltin diacetate, di-n-octyltin oxide, and di-n-octyl.
  • tin dilaurate monobutyltin trichloride, di-n-butyltin dialkyl mercaptan and di-n-octyl tin dialkyl mercaptan.
  • a foam stabilizer may be included as an additive.
  • the defoaming agent include, but are not limited to, a silicone-based defoaming agent or a fluorine-containing compound-based defoaming agent.
  • One type of defoaming agent may be used alone, or two or more types may be used in combination.
  • a cross-linking agent may be included as an additive.
  • a compound having two or more active hydrogen-containing groups selected from a hydroxyl group, a primary amino group and a secondary amino group can be selected.
  • the cross-linking agent include ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, 1,6-hexanediol, diethylene glycol, triethylene glycol, dipropylene glycol, glycerin, trimethylolpropane, pentaerythritol, and diglycerin.
  • cross-linking agent the above-mentioned polyoxyalkylene polyol having a molecular weight / number of hydroxyl groups of less than 500 can also be used.
  • One type of cross-linking agent may be used alone, or two or more types may be used in combination.
  • Additives other than the above include emulsifiers, antioxidants, antioxidants such as UV absorbers, fillers such as calcium carbonate or barium sulfate, plasticizers, colorants, flame retardants, antifungal agents, foam breakers and the like.
  • emulsifiers antioxidants, antioxidants such as UV absorbers
  • fillers such as calcium carbonate or barium sulfate
  • plasticizers such as calcium carbonate or barium sulfate
  • colorants such as calcium carbonate or barium
  • the formulation of the resin composition is shown below.
  • As the system liquid 60 parts by mass of a polyoxyalkylene polyol (manufactured by AGC, trade name: EXCENOL820), 40 parts by mass of another polyoxyalkylene polyol (manufactured by AGC, trade name: EXCENOL923), and water as a foaming agent.
  • the fender liner 1 of the above embodiment includes only the foam layer 11, but may further include parts attached to the foam layer 11.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Ce procédé de fabrication de doublure d'aile comprend les étapes (A) à (F) suivantes. (A) Une pluralité de moules fendus qui constituent un moule de formage sont fermés. (B) Une composition de résine est injectée dans un espace intérieur du moule de formage fermé par l'intermédiaire d'un orifice d'injection du moule de formage. (C) La composition de résine est expansée dans l'espace intérieur du moule de formage. (D) La composition de résine expansée est durcie afin d'obtenir une couche de corps expansé. (E) La pluralité de moules fendus sont ouverts. (F) La couche de corps expansé est retirée du moule de formage ouvert. La couche de corps expansé est déposée en forme incurvée sur la périphérie extérieure d'un pneu d'un véhicule et utilisée en tant que doublure d'aile.
PCT/JP2020/048525 2019-12-26 2020-12-24 Procédé de fabrication de doublure d'aile WO2021132497A1 (fr)

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JP2021567634A JPWO2021132497A1 (fr) 2019-12-26 2020-12-24
CN202080086906.3A CN114829237B (zh) 2019-12-26 2020-12-24 挡泥板内衬的制造方法
DE112020006369.0T DE112020006369T5 (de) 2019-12-26 2020-12-24 Verfahren zur Herstellung einer Kotflügelauskleidung

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003140659A (ja) * 2001-11-02 2003-05-16 Nippon Tokushu Toryo Co Ltd 吸音発泡プラスチック及びその製法
JP2012008458A (ja) * 2010-06-28 2012-01-12 Kojima Press Industry Co Ltd 車両用外装品並びに車両の吸音構造
JP2012166717A (ja) * 2011-02-15 2012-09-06 Kojima Press Industry Co Ltd 車両外装用吸音構造体並びに車両の吸音構造
WO2013077003A1 (fr) * 2011-11-24 2013-05-30 三井屋工業株式会社 Matériau de finition intérieur/extérieur de véhicule et son procédé de fabrication
JP2019014288A (ja) * 2017-07-04 2019-01-31 株式会社イノアックコーポレーション 車両用内装材

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6913333B2 (ja) 2018-07-23 2021-08-04 株式会社市金工業社 シート状物移送装置およびこれを備えたシート状物加工装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003140659A (ja) * 2001-11-02 2003-05-16 Nippon Tokushu Toryo Co Ltd 吸音発泡プラスチック及びその製法
JP2012008458A (ja) * 2010-06-28 2012-01-12 Kojima Press Industry Co Ltd 車両用外装品並びに車両の吸音構造
JP2012166717A (ja) * 2011-02-15 2012-09-06 Kojima Press Industry Co Ltd 車両外装用吸音構造体並びに車両の吸音構造
WO2013077003A1 (fr) * 2011-11-24 2013-05-30 三井屋工業株式会社 Matériau de finition intérieur/extérieur de véhicule et son procédé de fabrication
JP2019014288A (ja) * 2017-07-04 2019-01-31 株式会社イノアックコーポレーション 車両用内装材

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CN114829237A (zh) 2022-07-29

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