JP2004306832A - Weather strip for automobile - Google Patents

Weather strip for automobile Download PDF

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Publication number
JP2004306832A
JP2004306832A JP2003104764A JP2003104764A JP2004306832A JP 2004306832 A JP2004306832 A JP 2004306832A JP 2003104764 A JP2003104764 A JP 2003104764A JP 2003104764 A JP2003104764 A JP 2003104764A JP 2004306832 A JP2004306832 A JP 2004306832A
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JP
Japan
Prior art keywords
mounting base
weather strip
automobile
base
resin film
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2003104764A
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Japanese (ja)
Inventor
Yasuyuki Fujita
保行 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishikawa Rubber Co Ltd
Original Assignee
Nishikawa Rubber Co Ltd
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 Nishikawa Rubber Co Ltd filed Critical Nishikawa Rubber Co Ltd
Priority to JP2003104764A priority Critical patent/JP2004306832A/en
Publication of JP2004306832A publication Critical patent/JP2004306832A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip for an automobile capable of simplifying a manufacturing step and reducing manufacturing costs by forming a color resin film layer without adhesive on an outer surface of a mounting base. <P>SOLUTION: This weather strip is installed for sealing between a body 1 of an automobile and a door 2 or the like, and comprises at least an approximately U-sectioned mounting base 11, and a hollow seal part 14 integrated with the mounting base 11. The mounting base 11 is constituted by coextruding a base body 12 formed by TPO, a resin core material 13, and a color resin film layer 16 on the outer surface of the base body 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】本発明は、少なくとも、断面略U字状の取付基部と中空シール部を備え、自動車のボディとドア等(フロントドア、リヤドア、バックドアおよびトランクリッド等)との間をシールするために設けられるウエザーストリップに関するものである。
【0002】
【従来の技術】例えば、自動車のボディとフロントドアとの間をシールするためにウエザーストリップが使用されるが、このウエザーストリップは、ボディフランジに組付く断面略U字状の取付基部と、ドアに弾接する中空シール部を備えている(例えば、特許文献1参照)。また、内側パネルに当接する装飾リップ部を併せ備えたものもある。
【0003】
【特許文献1】
特開2001−310363号公報
【0004】
こうした形状のウエザーストリップ20において、図1および図2に示すように、取付基部21をEPDM(エチレン−プロピレン三元共重合体ゴム)で形成して、その内部に芯金23を埋設し、さらに、その外表面にカラー樹脂皮膜24を形成して、見栄えの向上を図ったものがある。
【0005】
【発明が解決しようとする課題】上記した従来のウェザーストリップ20は、次のような2つの方法によって作られている。
【0006】
第1の方法は、取付基部21のEPDM配合ゴムと芯金23とをゴム押出機の口金部から共押出し、加硫炉を通したのち、接着剤を介してカラー樹脂被膜24を接着被覆する方法である。この場合には、接着する条件として熱・圧力が必要となる。
【0007】
第2の方法は、取付基部21用EPDM配合ゴムと芯金23と被覆膜用カラー樹脂とをゴム押出機の口金から共押出し、カラー樹脂層も取付基部・芯金と一緒に加硫炉を通す方法である。この場合にも、接着するための条件として熱・圧力が必要となる。接着剤が不要なためコストアップにはならないが、加硫炉を通すため、カラー樹脂被膜層が変退色して、外観が劣化する現象が発生する。その原因の1つとして、EPDM表面から、樹脂のカラー皮膜層へ、カラーを変色させる物質が移行することが挙げられる。
【0008】
この発明は、取付基部,芯材,カラー樹脂皮膜層を同時に共押出可能にし、且つ接着剤不要で、而もカラー樹脂皮膜層が変色することのない自動車用ウェザーストリップを提供しようとするものである。
【0009】
【課題を解決するための手段】
図1および図3を参照して説明する。第一の発明に係る自動車用ウエザーストリップ10は、自動車のボディ1とドア2等との間をシールするために設けられ、少なくとも、断面略U字状の取付基部11と、当該取付基部11に一体設した中空シール部14を備えるウエザーストリップであって、前記取付基部11を、TPO(ポリオレフィン系熱可塑性エラストマー)で形成した基部本体12と樹脂芯材13と、同時押出成形・圧着してなるものである。前記基部本体12の外表面のカラー樹脂皮膜層16を同時押出成形・圧着してなるものである。
【0010】
第二の発明に係る自動車用ウエザーストリップ10は、自動車のボディ1とドア2等との間をシールするために設けられ、底壁11aの両端部から側壁11bを立設した断面略U字状の取付基部11と、当該取付基部11に一体設した中空シール部14と、前記取付基部11から突設され、先端部が内側パネル3に当接する装飾リップ部15を設けたウエザーストリップであって、前記取付基部11を、TPOで形成した基部本体12と樹脂芯材13をTPOで形成する装飾リップ部15と、前記基部本体12の底壁11a側である外表面から前記装飾リップ部15の外表面にわたるカラー樹脂皮膜層16を同時押出成形・圧着してなるものである。
【0011】
【発明の実施の形態】本発明に係る自動車用ウエザーストリップ10の実施形態を、図1および図3に示す。これは、自動車のボディ1とドア2等との間をシールするために設けられ、底壁11aの両端部から側壁11bを立設した断面略U字状の取付基部11と、その取付基部11に一体設した中空シール部14と、取付基部11から突設され、先端部が内側パネル3に当接する装飾リップ部15を備えている。また、取付基部11の内面側に、ボディフランジ1aを挟持するための挟持爪部17を備えている。
【0012】
このウエザーストリップ10は、ボディ1とフロントパネルとの間をシールするものであり、その取付基部11を、ドア開口部に沿って設けられたボディフランジ1aに取付け、中空シール部14を、ドア閉時に、ドア2に弾接させてシール性を確保するものである。
【0013】
当該ウエザーストリップ10において、取付基部11を、TPOで形成した基部本体12の内面側に樹脂芯材13を一体成形して構成し、装飾リップ部15をTPOで形成している。そして、基部本体12の底壁11a側である外表面と装飾リップ部15の同じく外表面にわたって、連続的にカラー樹脂被膜16を熱融着で被覆している。
【0014】
なお、中空シール部14は発泡TPOで、樹脂芯材13は30%タルク入りポリプロピレンで、また、カラー樹脂被膜16はTPE(熱可塑性エラストマー)や発泡TPEでそれぞれ形成している。
【0015】
また、カラー樹脂被膜16の熱融着は、加硫時の熱によって行うこともでき、また、それ以外の簡易な加熱装置によって行うこともできる。
【0016】
本発明においては、芯材13を樹脂で、基部本体12と必要に応じ設ける装飾リップとをTPOで、カラー樹脂皮膜層16を、押出口を3個併設した口金で押出したのち、適温で加熱しながら、接着方向に圧力を加えるだけで接着するものである。材質が似ている樹脂同士であるため接着剤無しで、熱・圧力のみで接着が出来るための接着剤が不要となり、またカラー樹脂皮膜層16の変退色も発生しない。
【0017】
【発明の効果】請求項1に記載の発明に係る自動車用ウエザーストリップ10は、取付基部11の基部本体12をTPOで形成し、その外表面に樹脂製であるカラー樹脂皮膜層16を同時押出成形・圧着するので、接着剤による接着工程を必要としない。従って、製造工程を簡素化し、製造コストを削減することができる。
【0018】
請求項2に記載の発明に係る自動車用ウエザーストリップ10は、取付基部11のTPOで形成する基部本体12と装飾リップ部15及び、それらの外表面にカラー樹脂皮被膜層16を同時押出成形・圧着するので、接着剤による接着工程を必要としない。また、カラー樹脂皮膜層の変退色が発生することもない。よって、製造工程を簡素化して、製造コストを削減することができる。
【図面の簡単な説明】
【図1】ウエザーストリップを取付けた自動車を示す側面図である。
【図2】従来例に係るウエザーストリップを示すもので、図1のX−X線断面図である。
【図3】本発明に係るウエザーストリップの実施形態を示すもので、図1のX−X線断面図である。
【符号の説明】
1 ボディ
1a ボディフランジ
2 ドア
3 内装パネル
10 ウエザーストリップ
11 取付基部
11a 底壁
11b 側壁
12 基部本体
13 樹脂芯材
14 中空シール部
15 装飾リップ部
16 カラー樹脂被膜
17 爪部
20 ウエザーストリップ
21 取付基部
22 中空シール部
23 芯金
24 カラー樹脂被膜
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises at least a mounting base having a substantially U-shaped cross section and a hollow seal portion, and is provided between an automobile body and a door (a front door, a rear door, a back door, a trunk lid, etc.). The present invention relates to a weatherstrip provided for sealing a weather strip.
[0002]
2. Description of the Related Art For example, a weatherstrip is used to seal between a vehicle body and a front door. The weatherstrip is attached to a body flange and has a substantially U-shaped mounting base and a door. (See, for example, Patent Document 1). In addition, there is also one provided with a decorative lip portion abutting on the inner panel.
[0003]
[Patent Document 1]
JP 2001-310363 A
In the weatherstrip 20 having such a shape, as shown in FIGS. 1 and 2, the mounting base 21 is formed of EPDM (ethylene-propylene terpolymer rubber), and a core metal 23 is embedded therein. In some cases, a color resin film 24 is formed on the outer surface to improve the appearance.
[0005]
The conventional weatherstrip 20 described above is manufactured by the following two methods.
[0006]
In the first method, the EPDM compounded rubber of the mounting base 21 and the core metal 23 are co-extruded from a die portion of a rubber extruder, passed through a vulcanizing furnace, and then adhesively coated with a color resin film 24 via an adhesive. Is the way. In this case, heat and pressure are required as conditions for bonding.
[0007]
In the second method, the EPDM compounded rubber for the mounting base 21, the core metal 23, and the color resin for the coating film are co-extruded from a die of a rubber extruder, and the color resin layer is also vulcanized together with the mounting base and the core metal. It is a method of passing through. Also in this case, heat and pressure are required as conditions for bonding. Although the cost is not increased because an adhesive is not required, the phenomenon that the color resin coating layer discolors and discolors and the appearance deteriorates occurs through the vulcanizing furnace. One of the causes is that a substance that changes color is transferred from the EPDM surface to the resin color coating layer.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a weatherstrip for an automobile which allows a mounting base, a core material, and a color resin film layer to be simultaneously extruded, does not require an adhesive, and does not discolor the color resin film layer. is there.
[0009]
[Means for Solving the Problems]
This will be described with reference to FIGS. The weather strip 10 for a vehicle according to the first invention is provided for sealing between the body 1 of the vehicle and the door 2 and the like. At least, the mounting base 11 having a substantially U-shaped cross section and the mounting base 11 are provided. A weather strip having a hollow seal portion 14 provided integrally, wherein the mounting base portion 11 is simultaneously extruded and crimped with a base body 12 formed of TPO (polyolefin-based thermoplastic elastomer) and a resin core material 13. Things. The color resin film layer 16 on the outer surface of the base body 12 is formed by simultaneous extrusion molding and pressure bonding.
[0010]
The weather strip 10 for an automobile according to the second invention is provided for sealing between the body 1 of the automobile and the door 2 and the like, and has a substantially U-shaped cross section in which side walls 11b are erected from both ends of a bottom wall 11a. A weather strip having a mounting base 11, a hollow seal portion 14 integrally provided with the mounting base 11, and a decorative lip 15 protruding from the mounting base 11 and having a front end portion abutting on the inner panel 3. The mounting base 11 is formed of a base body 12 formed of TPO and a decorative lip 15 formed of a resin core 13 of TPO, and a decorative lip 15 formed from an outer surface on the bottom wall 11a side of the base body 12. The color resin film layer 16 over the outer surface is formed by simultaneous extrusion molding and pressure bonding.
[0011]
1 and 3 show an embodiment of a weather strip 10 for a vehicle according to the present invention. This is provided to seal between the body 1 of the automobile and the door 2 and the like, and has a mounting base 11 having a substantially U-shaped cross section in which side walls 11b are erected from both ends of a bottom wall 11a. And a decorative lip 15 protruding from the mounting base 11 and having a distal end abutting on the inner panel 3. Further, a holding claw 17 for holding the body flange 1a is provided on the inner surface side of the mounting base 11.
[0012]
The weather strip 10 seals the space between the body 1 and the front panel. The mounting base 11 is attached to a body flange 1a provided along the door opening, and the hollow seal portion 14 is closed. Occasionally, the seal is secured by elastic contact with the door 2.
[0013]
In the weather strip 10, the mounting base 11 is formed by integrally molding a resin core material 13 on the inner surface side of a base body 12 formed of TPO, and the decorative lip 15 is formed by TPO. Then, the color resin film 16 is continuously coated by thermal fusion over the outer surface of the base body 12 on the side of the bottom wall 11a and the outer surface of the decorative lip 15 as well.
[0014]
The hollow seal portion 14 is formed of foamed TPO, the resin core 13 is formed of polypropylene containing 30% talc, and the color resin film 16 is formed of TPE (thermoplastic elastomer) or foamed TPE.
[0015]
In addition, the thermal fusion of the color resin film 16 can be performed by heat at the time of vulcanization, or can be performed by another simple heating device.
[0016]
In the present invention, the core material 13 is extruded with a resin, the base body 12 and a decorative lip provided as required are extruded with a TPO, and the color resin film layer 16 is extruded with a die having three extrusion ports. In this case, bonding is performed only by applying pressure in the bonding direction. Since the resins are made of similar materials, no adhesive is required for bonding only by heat and pressure without an adhesive, and no discoloration or fading of the color resin film layer 16 occurs.
[0017]
According to the weather strip for automobiles according to the first aspect of the present invention, the base body 12 of the mounting base 11 is formed of TPO, and a color resin film layer 16 made of resin is simultaneously extruded on the outer surface thereof. Since molding and pressure bonding are performed, there is no need for an adhesive bonding step. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.
[0018]
The weather strip 10 for an automobile according to the second aspect of the present invention has a base main body 12 and a decorative lip 15 formed of TPO of the mounting base 11, and a color resin coating layer 16 on the outer surfaces thereof by simultaneous extrusion molding. Since bonding is performed by pressure, an adhesive bonding step is not required. Also, no discoloration of the color resin film layer occurs. Therefore, the manufacturing process can be simplified and the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view showing an automobile to which a weather strip is attached.
FIG. 2 shows a weather strip according to a conventional example, and is a cross-sectional view taken along line XX of FIG.
FIG. 3 shows an embodiment of a weather strip according to the present invention, and is a cross-sectional view taken along line XX of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 1a Body flange 2 Door 3 Interior panel 10 Weather strip 11 Mounting base 11a Bottom wall 11b Side wall 12 Base body 13 Resin core material 14 Hollow seal part 15 Decorative lip part 16 Color resin coating 17 Claw part 20 Weather strip 21 Mounting base 22 Hollow seal 23 Core 24 Color resin coating

Claims (2)

自動車のボディ(1)とドア(2)等との間をシールするために設けられ,少なくとも,断面略U字状の取付基部(11)と,該取付基部に一体設した中空シール部(14)を備えるウエザーストリップであって、前記取付基部を,TPOで形成した基部本体(12)と樹脂芯材(13)と,前記基部本体の外表面のカラー樹脂皮膜層(16)を同時押出成形・圧着してなる自動車用ウエザーストリップ。At least a mounting base (11) having a substantially U-shaped cross section and a hollow seal (14) provided integrally with the mounting base are provided for sealing between the body (1) of the automobile and the door (2) and the like. ) Wherein the mounting base is formed by simultaneously extruding a base body (12) and a resin core (13) formed of TPO, and a color resin film layer (16) on the outer surface of the base body.・ Weather strip for automobiles formed by crimping. 自動車のボディ(1)とドア(2)等との間をシールするために設けられ,底壁(11a)の両端部から側壁(11b)を立設した断面略U字状の取付基部(11)と,該取付基部に一体設した中空シール部(14)と,前記取付基部から突設され,先端部が内側パネル(3)に当接する装飾リップ部(15)を設けたウエザーストリップであって、前記取付基部を,TPOで形成した基部本体(12)と樹脂芯材(13)を,TPOで形成した装飾リップ部と,前記基部本体の底壁(11a)側である外表面から前記装飾リップ部の外表面にわたるカラー樹脂皮膜層(16)を同時押出成形・圧着してなる自動車用ウエザーストリップ。A mounting base (11) having a substantially U-shaped cross section is provided for sealing between the body (1) of the automobile and the door (2), and has a side wall (11b) erected from both ends of the bottom wall (11a). ), A weather seal strip provided integrally with the mounting base, and a decorative lip (15) projecting from the mounting base and having a tip abutting on the inner panel (3). The mounting base is formed by connecting a base body (12) and a resin core (13) formed of TPO to a decorative lip formed of TPO and an outer surface on the bottom wall (11a) side of the base body. A weather strip for automobiles obtained by simultaneously extruding and pressing a color resin film layer (16) over the outer surface of a decorative lip.
JP2003104764A 2003-04-09 2003-04-09 Weather strip for automobile Pending JP2004306832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003104764A JP2004306832A (en) 2003-04-09 2003-04-09 Weather strip for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003104764A JP2004306832A (en) 2003-04-09 2003-04-09 Weather strip for automobile

Publications (1)

Publication Number Publication Date
JP2004306832A true JP2004306832A (en) 2004-11-04

Family

ID=33467464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003104764A Pending JP2004306832A (en) 2003-04-09 2003-04-09 Weather strip for automobile

Country Status (1)

Country Link
JP (1) JP2004306832A (en)

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