WO2018097237A1 - Procédé de fabrication d'un élément d'amortissement des vibrations et procédé de fabrication d'un corps structural - Google Patents

Procédé de fabrication d'un élément d'amortissement des vibrations et procédé de fabrication d'un corps structural Download PDF

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Publication number
WO2018097237A1
WO2018097237A1 PCT/JP2017/042182 JP2017042182W WO2018097237A1 WO 2018097237 A1 WO2018097237 A1 WO 2018097237A1 JP 2017042182 W JP2017042182 W JP 2017042182W WO 2018097237 A1 WO2018097237 A1 WO 2018097237A1
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WO
WIPO (PCT)
Prior art keywords
molded body
damping member
manufacturing
parison
hinge portion
Prior art date
Application number
PCT/JP2017/042182
Other languages
English (en)
Japanese (ja)
Inventor
輝雄 玉田
奈央人 谷
小野寺　正明
Original Assignee
キョーラク株式会社
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 キョーラク株式会社 filed Critical キョーラク株式会社
Publication of WO2018097237A1 publication Critical patent/WO2018097237A1/fr

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    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/04—Extrusion blow-moulding
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means

Definitions

  • the present invention relates to a method for manufacturing a damping member and a method for manufacturing a structure.
  • Patent Document 1 describes disposing an annular foam material in a cylindrical body constituting a car body of an automobile.
  • the present invention has been made in view of such circumstances, and provides a method for manufacturing a vibration damping member with improved vibration damping properties.
  • a method for manufacturing a damping member inserted into a cylinder wherein the damping member includes a molded body, and the molded body includes a plurality of base portions and a plurality of base portions.
  • the manufacturing method includes a hinge portion that connects two adjacent ones, and the manufacturing method includes extruding a molten resin to form a parison and placing it between a pair of split molds, and clamping the split molds.
  • a molding step of forming the molded body by performing molding of the parison, and the hinge portion is formed on the molded body by compressing the parison with the divided mold when the divided mold is clamped.
  • a method for manufacturing a vibration damping member is provided.
  • the present inventor has intensively studied to improve the vibration damping performance of the vibration damping member.
  • the vibration damping performance is improved by configuring the vibration damping member inserted into the cylinder to press the cylinder from the inside.
  • the damping member was made into a cylinder in the state where the damping member was folded in the hinge part formed by compressing a parison.
  • the base of the molded body pressed the cylindrical body from the inside by the restoring force generated in the hinge portion, and the present invention was completed.
  • the molded body has a hollow portion.
  • the vibration damping member includes an elastic member between surfaces facing each other when the molded body is folded at the hinge portion.
  • the elastic member is made of a nonwoven fabric.
  • the nonwoven fabric is made of resin fibers.
  • the resin constituting the resin fiber has a higher Picat softening point than the resin constituting the molded body.
  • the resin fiber is a fiber of 5 denier or more.
  • the elastic member is integrally formed with the molded body.
  • the vibration damping member includes a cushion member on a surface that becomes an outer periphery when the molded body is folded at the hinge portion.
  • the cushion member is made of a nonwoven fabric.
  • the cushion member is integrally formed with the molded body.
  • the molded body includes at least two hinge portions.
  • the molded body has a configuration in which three base parts are connected by two hinge parts.
  • the molded body has a configuration in which two base parts are connected by one hinge part.
  • the molded body is a foam molded body.
  • a method of manufacturing a structure including a step of inserting a vibration damping member into a cylindrical body, wherein the vibration damping member is a vibration damping member manufactured by the method described above.
  • a method is provided in which the damping member is inserted into the cylindrical body with the damping member folded at the hinge.
  • FIG. 5 is a perspective view showing a configuration of a vibration damping member 1 of a second embodiment of the present invention, and (a) to (c) are views corresponding to FIGS. 1 (a) to (c).
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. 5 showing a parison formation process.
  • FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 showing a parison formation process. It is sectional drawing of the same cross section as FIG. 5 which shows a formation process.
  • the damping member 1 is a member for reducing sound propagation through the cylinder 5 by suppressing vibration of the cylinder 5 by being inserted into the cylinder 5.
  • the cylindrical body 5 is, for example, a reinforcement in an instrument panel of an automobile, has a pipe shape, and has a circular inner cross section, for example.
  • the vibration damping member 1 includes a molded body 2, an elastic member 3, and a cushion member 4.
  • the elastic member 3 is provided on one surface of the molded body 2.
  • the cushion member 4 is provided on the other surface of the molded body 2.
  • the molded body 2 includes a first base portion 2a and second base portions 2b provided on both sides thereof.
  • the base portions 2a and 2b are connected to each other by a hinge portion 2c. Therefore, the molded body 2 has a configuration in which three base portions are connected by two hinge portions 2c.
  • the hinge portion 2c is configured to function as a leaf spring, and a restoring force is generated when the molded body 2 is bent at the hinge portion.
  • the molded body 2 preferably includes at least two hinge portions. This is because the greater the number of hinge portions, the greater the total restoring force, and as a result, the force with which the molded body 2 presses the cylindrical body 5 from the inside increases.
  • the hinge portion 2 c is formed by compressing the parison 23 with divided molds 19, 20, 20 (details will be described later). For this reason, the hinge part 2c has high precision and high rigidity.
  • the bases 2a and 2b are each formed by molding the parison 23 using a split mold. Each of the base portions 2a and 2b includes a hollow portion 2d.
  • the base portions 2a and 2b may be foamed molded products or non-foamed molded products. However, since the base portions 2a and 2b are foam molded products, the base portions 2a and 2b are superior in light weight and sound deadening. 2a and 2b are preferably foam molded articles.
  • the molded body 2 is preferably formed of, for example, a thermoplastic resin such as polyolefin, and examples of the polyolefin include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, and mixtures thereof. Etc.
  • the vibration damping member 1 is inserted into the cylinder 5 in a state where the vibration damping member 1 is folded at the hinge portion 2c.
  • the outer surface shape of the damping member 1 substantially matches the inner surface shape of the cylindrical body 5.
  • the hinge portion 2c functions as a leaf spring and a restoring force works. With this restoring force, the bases 2a and 2b of the molded body 2 press the cylinder 5 from the inside via the cushion member 4, and vibration of the cylinder 5 is effectively suppressed.
  • the cushion member 4 is not essential, and when there is no cushion member 4, the base parts 2a and 2b press the cylinder 5 directly from the inside.
  • the elastic member 3 is arrange
  • the elastic member 3 any member that generates a restoring force by being compressed can be used.
  • the elastic member 3 can be formed of resin or rubber. It is preferable that the elastic member 3 is comprised with a nonwoven fabric. In this case, it is because the elastic member 3 is easy to generate a restoring force and it is easy to integrally mold the elastic member 3 with the molded body 2.
  • the nonwoven fabric is preferably composed of resin fibers.
  • the resin fiber is preferably a fiber of 5 denier or more. In this case, the rigidity of the elastic member 3 tends to be sufficiently high.
  • the resin constituting the resin fiber preferably has a higher Picat softening point than the resin constituting the molded body 2.
  • the force with which the elastic member 3 presses the base portions 2a and 2b against the cylindrical body 5 is maintained for a long time.
  • the resin constituting the resin fiber include PET and polyamide.
  • the bases 2a and 2b strongly press the cylinder 5 from the inside by the restoring force of the hinge 2c and the restoring force of the elastic member 3, and vibration of the cylinder 5 is effectively suppressed.
  • the elastic member 3 can be omitted, and in this case, the base portions 2a and 2b press the cylindrical body 5 from the inside by the restoring force of the hinge portion 2c.
  • the cushion member 4 is disposed on the surface that becomes the outer periphery when the molded body 2 is folded by the hinge portion 2c.
  • the cushion member 4 is provided in order to improve the adhesion between the molded body 2 and the cylinder 5, and the cushion member 4 can be composed of any member that can exhibit such a function.
  • the cushion member 4 is preferably formed of a member that is more easily deformed than the molded body 2.
  • the cushion member 4 is preferably composed of a nonwoven fabric. This is because in this case, the cushion member 4 can easily improve the adhesion between the molded body 2 and the cylindrical body 5, and the cushion member 4 can be easily molded integrally with the molded body 2.
  • the elastic member 3 and the cushion member 4 are preferably composed of non-woven fabric having the same configuration. In this case, the number of members is reduced and manufacturing efficiency is improved.
  • Second embodiment A vibration damping member 1 according to a second embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first embodiment, and the difference in the configuration of the molded body 2 is the main difference.
  • the molded body 2 includes a pair of base portions 2e and a hinge portion 2c that connects them. Therefore, the molded body 2 of the present embodiment has a configuration in which two base parts are connected by one hinge part 2c. Also in this embodiment, as shown in FIG. 2 (b), when the damping member 1 is folded by the hinge portion 2c, the hinge portion 2c functions as a leaf spring to generate a restoring force, and the base portion 2e has the cylindrical body 5. Press from the inside. When the vibration damping member 1 is folded at the hinge portion 2c, the elastic member 3 is compressed and deformed between the contact surfaces 2e1 of the pair of base portions 2e to generate a restoring force. Therefore, also in the present embodiment, the base portion 2b strongly presses the cylindrical body 5 from the inside by the restoring force of the hinge portion 2c and the restoring force of the elastic member 3.
  • the molding machine 6 includes a resin supply device 7, a head 18, and divided molds 19 and 20.
  • the resin supply device 7 includes a hopper 12, an extruder 13, an injector 16, and an accumulator 17.
  • the extruder 13 and the accumulator 17 are connected via a connecting pipe 25.
  • the accumulator 17 and the head 18 are connected via a connecting pipe 27.
  • the hopper 12 is used for charging the raw resin 11 into the cylinder 13 a of the extruder 13.
  • the raw material resin 11 is, for example, a thermoplastic resin such as polyolefin, and examples of the polyolefin include low density polyethylene, linear low density polyethylene, high density polyethylene, polypropylene, ethylene-propylene copolymer, and a mixture thereof.
  • the raw material resin 11 is poured into the cylinder 13a from the hopper 12 and then melted by being heated in the cylinder 13a to become a molten resin.
  • a screw is arrange
  • a gear device is provided at the base end of the screw, and the screw is driven to rotate by the gear device.
  • the number of screws arranged in the cylinder 13a may be one or two or more.
  • the cylinder 13a is provided with an injector 16 for injecting a foaming agent into the cylinder 13a.
  • the injector 16 can be omitted.
  • the foaming agent injected from the injector 16 include physical foaming agents, chemical foaming agents, and mixtures thereof, but physical foaming agents are preferred.
  • physical foaming agents inorganic physical foaming agents such as air, carbon dioxide, nitrogen gas, and water, and organic physical foaming agents such as butane, pentane, hexane, dichloromethane, dichloroethane, and their supercritical fluids are used. be able to.
  • the supercritical fluid it is preferable to use carbon dioxide, nitrogen or the like.
  • the critical temperature is 149.1 ° C. and the critical pressure is 3.4 MPa or more, and if carbon dioxide, the critical temperature is 31 ° C. It is obtained by setting it to 7.4 MPa or more.
  • the chemical foaming agent include those that generate carbon dioxide by a chemical reaction between an acid (eg, citric acid or a salt thereof) and a base (eg, sodium bicarbonate). The chemical foaming agent may be supplied from the hopper 12 instead of being injected from the injector 16.
  • the molten resin 11a with or without a blowing agent added is pushed out from the resin extrusion port of the cylinder 13a and injected into the accumulator 17 through the connecting pipe 25.
  • the accumulator 17 includes a cylinder 17a and a piston 17b that can slide inside the cylinder 17a, and the molten resin 11a can be stored in the cylinder 17a. Then, by moving the piston 17b after a predetermined amount of the molten resin 11a is stored in the cylinder 17a, the molten resin 11a is pushed out from the die slit provided in the head 18 through the connecting pipe 27, and the parison 23 is dropped.
  • the shape of the parison 23 is not particularly limited, and may be a cylindrical shape or a sheet shape.
  • the parison 23 is guided between the pair of split molds 19 and 20.
  • a molded body is obtained by molding the parison 23 using the divided dies 19 and 20.
  • the molding method using the split molds 19 and 20 is not particularly limited, and may be blow molding in which air is blown into the cavities of the split molds 19 and 20. Vacuum forming in which the inside of the cavity is decompressed from the inner surface of the cavity to form the parison 23 may be used, or a combination thereof may be used.
  • the parison 23 becomes a foamed parison, and the molded body becomes a foamed molded body.
  • the damping member 1 can be formed by a method including a parison formation step, a molding step, and a post-processing step. Hereinafter, each step will be described in detail. Hereinafter, although the manufacturing method of the damping member 1 of the first embodiment will be described as an example, the damping member 1 of the second embodiment can be manufactured by the same method.
  • the parison forming step as shown in FIGS. 4 to 5, the molten resin is extruded from the head and dropped to form the parison 23, and the parison 23 is disposed between the divided molds 19 and 20.
  • the split mold 19 includes a cavity 19a surrounded by a pinch-off portion 19b.
  • the split mold 20 includes a protrusion 20c in a cavity 20a surrounded by a pinch-off portion 20b.
  • An elastic member sheet 3 a constituting the elastic member 3 is suspended between the split mold 19 and the parison 23.
  • a cushion member sheet 4 a constituting the cushion member 4 is suspended between the split mold 20 and the parison 23.
  • the elastic member 3 and the cushion member 4 are made of a nonwoven fabric, a nonwoven fabric sheet is suspended on both sides of the parison 23.
  • the molds 2 are formed by clamping the divided molds 19 and 20 and molding the parison 23. At this time, the parison 23 is compressed by the divided molds 19 and 20 at the portion corresponding to the protrusion 20c, and the hinge portion 2c is formed. Further, the sheets 3a and 4a are integrally formed in the molded body 2 by being sandwiched between the parison 23 and the split mold 19, and the parison 23 and the split mold 20, respectively.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément d'amortissement des vibrations présentant une performance accrue d'amortissement des vibrations. Selon ledit procédé de fabrication d'un élément d'amortissement des vibrations qui est inséré dans un corps cylindrique, l'élément d'amortissement des vibrations comporte un corps moulé, et le corps moulé comporte de multiples parties de base et des parties charnières reliant entre elles deux parties de base adjacentes parmi les multiples parties de base. Ledit procédé de fabrication d'un élément d'amortissement des vibrations comporte une étape d'extrusion durant laquelle de la résine fondue est extrudée pour former une paraison, laquelle est ensuite disposée entre une paire de moules divisés, et une étape de moulage durant laquelle les moules divisés sont serrés ensemble, ce par quoi la paraison est moulée et le corps moulé est formé, et lorsque les moules divisés sont serrés ensemble, la paraison est comprimée par les moules divisés, formant ainsi les parties charnières sur le corps moulé.
PCT/JP2017/042182 2016-11-28 2017-11-24 Procédé de fabrication d'un élément d'amortissement des vibrations et procédé de fabrication d'un corps structural WO2018097237A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016230323A JP6777856B2 (ja) 2016-11-28 2016-11-28 制振部材の製造方法及び構造体の製造方法
JP2016-230323 2016-11-28

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WO2018097237A1 true WO2018097237A1 (fr) 2018-05-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111361128A (zh) * 2018-12-26 2020-07-03 绍兴福膜新材料有限公司 用于挤出和吹塑联动系统的管道阻尼减振装置和减振方法

Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2001013704A (ja) * 1999-07-01 2001-01-19 Fuji Xerox Co Ltd 電子写真感光体用消音部材及びそれを用いた電子写真感光体
JP2003503231A (ja) * 1999-06-28 2003-01-28 リア コーポレイション 一体成形ヒンジを備えたブロー成形プラスチック部品を形成する方法
JP2015000547A (ja) * 2013-06-17 2015-01-05 キョーラク株式会社 ダクト

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6076440A (ja) * 1983-09-30 1985-04-30 Nissan Shatai Co Ltd 車両用小物入れ及びその製造方法
JP5046396B2 (ja) * 2008-08-29 2012-10-10 キョーラク株式会社 車両用空調ダクト

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003503231A (ja) * 1999-06-28 2003-01-28 リア コーポレイション 一体成形ヒンジを備えたブロー成形プラスチック部品を形成する方法
JP2001013704A (ja) * 1999-07-01 2001-01-19 Fuji Xerox Co Ltd 電子写真感光体用消音部材及びそれを用いた電子写真感光体
JP2015000547A (ja) * 2013-06-17 2015-01-05 キョーラク株式会社 ダクト

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111361128A (zh) * 2018-12-26 2020-07-03 绍兴福膜新材料有限公司 用于挤出和吹塑联动系统的管道阻尼减振装置和减振方法
CN111361128B (zh) * 2018-12-26 2021-12-17 绍兴福膜新材料有限公司 用于挤出和吹塑联动系统的管道阻尼减振装置和减振方法

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JP2018087587A (ja) 2018-06-07
JP6777856B2 (ja) 2020-10-28

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