JP2015117648A - Heat resisting cover against exhaustion system parts and its process of manufacturing - Google Patents

Heat resisting cover against exhaustion system parts and its process of manufacturing Download PDF

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Publication number
JP2015117648A
JP2015117648A JP2013262042A JP2013262042A JP2015117648A JP 2015117648 A JP2015117648 A JP 2015117648A JP 2013262042 A JP2013262042 A JP 2013262042A JP 2013262042 A JP2013262042 A JP 2013262042A JP 2015117648 A JP2015117648 A JP 2015117648A
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Prior art keywords
exhaust system
fabric
cover
heat
system parts
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JP2013262042A
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JP6294068B2 (en
Inventor
益子 一豊
Kazutoyo Masuko
一豊 益子
影山 泰
Yasushi Kageyama
泰 影山
ピーター・ティ・ディーツ
T Dietz Peter
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Yutaka Giken Co Ltd
3M Innovative Properties Co
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Yutaka Giken Co Ltd
3M Innovative Properties Co
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Priority to JP2013262042A priority Critical patent/JP6294068B2/en
Priority to US15/102,294 priority patent/US20170002717A1/en
Priority to PCT/US2014/070700 priority patent/WO2015095252A1/en
Publication of JP2015117648A publication Critical patent/JP2015117648A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/148Multiple layers of insulating material
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/513Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • F01N13/141Double-walled exhaust pipes or housings
    • F01N13/143Double-walled exhaust pipes or housings with air filling the space between both walls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/20Exhaust treating devices having provisions not otherwise provided for for heat or sound protection, e.g. using a shield or specially shaped outer surface of exhaust device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2310/00Selection of sound absorbing or insulating material
    • F01N2310/14Wire mesh fabric, woven glass cloth or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00Selection of materials for tubes, chambers or housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2530/00Selection of materials for tubes, chambers or housings
    • F01N2530/26Multi-layered walls

Abstract

PROBLEM TO BE SOLVED: To provide a heat resisting cover of simple structure against exhaustion system parts in which, even if it is directly fitted by a fitting member, there occurs a less possibility of production or no production of strain at its fitting part due to thermal expansion and shrinkage of the heat resisting cover, further with less or no fear of electrical corrosion.SOLUTION: This invention relates to a heat resisting cover 3 against exhaustion system parts C that is fitted to cover them while being adjacent thereto. The cover is comprised of cloth fabric 10 of a prescribed shape, including inorganic fibers, and a mixture 11 immersed in the cloth fabric. The mixture 11 contains inorganic binder, inorganic filler particles and water. The mixture is dried to have sufficient rigidity for holding the prescribed shape in the cloth fabric 10.

Description

本発明は,排気系部品の遮熱カバーに関する。遮熱カバーは,多くの場合,排気系部品に,それを覆って取り付け部材により取り付けられる。遮熱カバーは,内燃機関の高温となる排気系部品の熱害を防ぐべく使用することができる。本発明は,その遮熱カバーの製造方法にも関する。   The present invention relates to a heat shield cover for exhaust system parts. In many cases, the heat shield cover is attached to an exhaust system part by an attachment member covering the exhaust system part. The heat shield cover can be used to prevent heat damage of exhaust system parts that become a high temperature of the internal combustion engine. The present invention also relates to a method for manufacturing the heat shield cover.

かゝる排気系部品の遮熱カバーは,下記特許文献1に開示されているように既に知られている。   Such a heat shield cover for exhaust system parts is already known as disclosed in Patent Document 1 below.

特開2010−156372号公報JP 2010-156372 A

特許文献1に開示される排気系部品の遮熱カバーは,熱膨張係数が比較的大きいアルミニウム板よりなっている。したがって,そのものでは,遮熱カバーの熱膨張及び収縮による歪みが遮熱カバーの取り付け部に発生してその耐久性を損じることがないように,遮熱カバーと取り付け部材との間に金属製の緩衝材を介装しているので,取り付け部材周りの構造が複雑となる上,取り付け部材周りでは,異種金属による電蝕の対策も必要となる。   The heat insulation cover for exhaust system parts disclosed in Patent Document 1 is made of an aluminum plate having a relatively large thermal expansion coefficient. Therefore, in order to prevent distortion due to thermal expansion and contraction of the heat shield cover from occurring in the heat shield cover attachment portion and impairing its durability, a metal cover is not provided between the heat shield cover and the attachment member. Since the cushioning material is interposed, the structure around the mounting member becomes complicated, and measures against electric corrosion caused by dissimilar metals are required around the mounting member.

本発明は,一つには,かゝる事情に鑑みてなされたものである。本発明は,以下の利点,即ち構造が簡単であること,取り付け部材による直接的取り付けによるも,その取り付け部に遮熱カバーの熱膨張及び収縮による歪みが発生しないこと,並びに電蝕の心配がないことの1つ又は任意の組合せを有する排気系部品の遮熱カバーを提供することを目的とする。本発明は,その遮熱カバーの製造方法を提供することをも目的とする。   The present invention has been made in view of such circumstances. The present invention has the following advantages, that is, the structure is simple, the direct attachment by the attachment member does not cause distortion due to the thermal expansion and contraction of the heat shield cover at the attachment portion, and there is a risk of electric corrosion. It is an object to provide a thermal barrier cover for exhaust system components having one or any combination of the absence. Another object of the present invention is to provide a method for manufacturing the heat shield cover.

上記目的を達成するために,本発明は,排気系部品に隣接して,それを覆って取り付けられるように操作可能に適合された,排気系部品の遮熱カバーにおいて,前記遮熱カバーが,所定の形状を付与される,無機繊維を含む布地と,前記布地に含浸させた混合物とよりなり,前記混合物が,無機バインダ,無機充填剤粒子及び水を含み,前記混合物が,乾燥されて前記布地の形状を保持するに充分な剛性となることを第1の特徴とする。   To achieve the above object, the present invention provides an exhaust system heat insulation cover that is adapted to be installed adjacent to and cover an exhaust system part, wherein the heat insulation cover comprises: A fabric comprising inorganic fibers and having a predetermined shape, and a mixture impregnated in the fabric, wherein the mixture includes an inorganic binder, inorganic filler particles, and water, and the mixture is dried and the mixture is dried. The first characteristic is that the fabric has sufficient rigidity to maintain the shape of the fabric.

前記排気系部品の好適な一例は,触媒コンバータである。また布地としては,織物又はニット状布地が望ましい。   A suitable example of the exhaust system component is a catalytic converter. The fabric is preferably a woven fabric or a knitted fabric.

また本発明は,第1の特徴に加えて,前記布地には,多層に重ねた少なくとも一部分を設けたことを第2の特徴とする。   In addition to the first feature, the present invention has a second feature that the fabric is provided with at least a part of a plurality of layers.

また本発明は,排気系部品と,この排気系部品に隣接して,それを覆って取り付けられる第1の特徴の遮熱カバーとを含む排気系を第3の特徴とする。   According to a third aspect of the present invention, there is provided an exhaust system including an exhaust system component and a heat shield cover having a first feature that is attached adjacent to and covers the exhaust system component.

また本発明は,第1の特徴の排気系部品の遮熱カバーを製造するに当たり,前記混合物を含浸させた布地を少なくとも一つの金型により前記所定形状に成形する工程と,前記金型を加熱して前記混合物を乾燥して,前記布地の形状を保持するに充分な剛性とする工程とを実行することを第4の特徴とする。   Further, according to the present invention, in manufacturing the heat shielding cover for the exhaust system part of the first feature, the step of forming the fabric impregnated with the mixture into the predetermined shape with at least one mold, and heating the mold The fourth feature is that the step of drying the mixture to make the mixture sufficiently rigid to maintain the shape of the fabric is performed.

さらに本発明は,第4の特徴に加えて,前記金型と前記織物との間に,前記混合物が付着し難い離型手段を介在させることを第5の特徴とする。   Furthermore, in addition to the fourth feature of the present invention, a fifth feature is that a mold release means for preventing the mixture from adhering is interposed between the mold and the fabric.

本発明の第1の特徴によれば,遮熱カバーは,所定の形状が付与される布地と,この布地に含浸,乾燥させて該布地の前記形状を保持する混合物とよりなるので,断熱性に優れ,遮熱カバーに隣接する各種機器又は物体への熱害を効果的に防ぐことができ,もしくは有為に減少させることができる。また遮熱カバーは,熱膨張係数が極めて小さい上,適度な柔軟性を有しているので,排気系部品(例えば,触媒コンバータ,排気マニフォルド,マフラ,微粒子フィルタ又はトラップ等)の熱膨張及び収縮に追従することができ,排気系部品への取り付け部に熱歪みが発生することもない。したがって,遮熱カバーの取り付け部材による直接的取り付けが可能となり,取り付け構造が簡単となることができ,コストの低減に寄与し得る。さらに遮熱カバーは,金属構成要素を使用せずに作製することができるので,取り付け部における電蝕の心配も除去することができ,もしくは有為に減少させることができる。   According to the first feature of the present invention, the heat insulating cover is composed of a fabric having a predetermined shape and a mixture that retains the shape of the fabric by impregnating and drying the fabric. It is excellent in that it can effectively prevent heat damage to various devices or objects adjacent to the heat shield cover, or can significantly reduce it. In addition, the thermal insulation cover has an extremely small coefficient of thermal expansion and has an appropriate flexibility, so that thermal expansion and contraction of exhaust system parts (for example, catalytic converter, exhaust manifold, muffler, particulate filter or trap). The thermal distortion does not occur in the attachment part to the exhaust system parts. Therefore, direct attachment by the attachment member of the heat shield cover is possible, the attachment structure can be simplified, and it can contribute to cost reduction. Furthermore, since the heat shield cover can be manufactured without using metal components, the concern of electrolytic corrosion at the mounting portion can be eliminated or can be significantly reduced.

本発明の第2の特徴によれば,前記布地には,多層に重ねた少なくとも一部分を設けたので,その多層に重ねた少なくとも一部分において,遮熱カバーの遮熱性及び/又は強度を高めることができる。   According to the second feature of the present invention, since the fabric is provided with at least a part of the multilayer, at least a part of the multilayer is able to improve the heat insulation and / or strength of the heat shield cover. it can.

本発明の第3の特徴によれば,排気系部品と,この排気系部品に隣接してそれを覆って取り付けられる遮熱カバーとを含む排気系が提供されるので,遮熱カバーに隣接して配置される排気系部品に対する熱害,或いは遮熱カバーに隣接して配置される排気系部品からの熱により他の機器又は物体に対する熱害を効果的に防ぐことができ,もしくは有為に減少させることができる。   According to the third aspect of the present invention, there is provided an exhaust system that includes an exhaust system component and a heat shield cover that is mounted adjacent to and covers the exhaust system component. Can effectively prevent heat damage to other equipment or objects due to heat damage to the exhaust system parts arranged in the air or heat from the exhaust system parts located adjacent to the heat shield cover, or Can be reduced.

本発明の第4の特徴によれば,第1の特徴の排気系部品の遮熱カバーを製造するに当たり,混合物を含浸させた布地を一つ以上の金型により所定形状に成形する工程と,少なくとも一つの金型を加熱して混合物を乾燥して,布地を所定の形状を保持するに充分な剛性とする工程とを実行するので,金型によって,一つ以上の金型によって,混合物を含浸した布地への所定形状付与及び混合物の乾燥を行うことができ,遮熱カバーを能率的に製造することができる。   According to a fourth aspect of the present invention, in manufacturing the heat insulation cover for the exhaust system component of the first aspect, a step of forming a fabric impregnated with the mixture into a predetermined shape with one or more molds; Heating the at least one mold and drying the mixture to make the fabric stiff enough to hold the predetermined shape, so that the mixture is removed by the mold, by one or more molds. A predetermined shape can be imparted to the impregnated fabric and the mixture can be dried, and a heat shield cover can be efficiently produced.

本発明の第5の特徴によれば,前記金型と前記布地との間に,前記混合物が付着し難い離型手段を介在させるので,離型手段によって,混合物の金型への付着を防ぐことができる。尚,前記離型手段は,後述する本発明の一実施形態中の離型シート19に対応する。前記離型手段は,また,含浸済みの布地と接触することになる金型の表面に適用される,好適な離型剤のコーティングであり得る。   According to the fifth feature of the present invention, since the mold release means to which the mixture is difficult to adhere is interposed between the mold and the fabric, the mold release means prevents the mixture from adhering to the mold. be able to. The release means corresponds to a release sheet 19 in one embodiment of the present invention described later. Said release means may also be a suitable release agent coating applied to the surface of the mold that will come into contact with the impregnated fabric.

本発明の遮熱カバーを取り付けた排気浄化用の触媒コンバータの側面図。The side view of the catalytic converter for exhaust purification which attached the heat shield cover of this invention. 上記遮熱カバーの斜視図。The perspective view of the said heat insulation cover. 図2の3−3線断面図。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. 図2の4−4線断面図。FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 前記遮熱カバーの製造に当たり,成形用の金型に素材をセットした状態を示す断面図。Sectional drawing which shows the state which set the raw material to the metal mold | die for shaping | molding in manufacture of the said heat insulation cover. 金型により素材を遮熱カバーに成形した状態を示す断面図。Sectional drawing which shows the state which shape | molded the raw material in the heat-insulation cover with the metal mold | die.

本発明の実施の形態を添付図面に基づいて以下に説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

先ず,図1において,符号Cは,例えば自動車の,内燃機関の排気浄化用の触媒コンバータである。この触媒コンバータCは,内燃機関と車体のダッシュボード(図示せず)との間に長手方向を鉛直方向に向けて配置される。この触媒コンバータCの上方の上流端には,内燃機関の排気マニフォルド(図示せず)の下流端が接合される入口フランジ1が,下方の下流端には,排気管(図示せず)が接続される出口フランジ2がそれぞれ形成される。したがって,この触媒コンバータCは内燃機関の排気系の一構成部品であり,この触媒コンバータCには,入口フランジ1及び出口フランジ2間において,触媒コンバータCに隣接する部材又は構造,例えば前記ダッシュボードに対面する側面を覆う遮熱カバー3が取り付けられる。即ち,図1及び図4に示すように,触媒コンバータCの外面の複数箇所にカバーステー4が溶接等により固着され,各カバーステー4は,透孔5とウェルディングナット6とを備えており,上記透孔5と合致する透孔7が遮熱カバー3を通る対応位置に設けられ,ボルト8がこれら透孔6及び7を通してウェルディングナット6に螺着,緊締されることで,遮熱カバー3はカバーステー4に締結される。   First, in FIG. 1, reference numeral C denotes a catalytic converter for purifying exhaust gas of an internal combustion engine of an automobile, for example. The catalytic converter C is disposed between the internal combustion engine and a dashboard (not shown) of the vehicle body with the longitudinal direction thereof directed vertically. An inlet flange 1 to which a downstream end of an exhaust manifold (not shown) of the internal combustion engine is joined is connected to the upper upstream end of the catalytic converter C, and an exhaust pipe (not shown) is connected to the lower downstream end. Each of the outlet flanges 2 is formed. Therefore, the catalytic converter C is a component of the exhaust system of the internal combustion engine. The catalytic converter C includes a member or structure adjacent to the catalytic converter C between the inlet flange 1 and the outlet flange 2, such as the dashboard. A heat shield cover 3 is attached to cover the side surface facing the. That is, as shown in FIGS. 1 and 4, cover stays 4 are fixed to a plurality of locations on the outer surface of the catalytic converter C by welding or the like, and each cover stay 4 includes a through hole 5 and a welding nut 6. Through holes 7 that coincide with the through holes 5 are provided at corresponding positions through the heat shield cover 3, and bolts 8 are screwed and tightened to the welding nut 6 through the through holes 6 and 7, thereby The cover 3 is fastened to the cover stay 4.

図2及び図3に示すように,遮熱カバー3は,触媒コンバータCの外側面に副うよう所定の形状が付与される無機繊維の布地10を含む。無機バインダと無機充填剤粒子と水との水性混合物11は,この布地10に含浸し,乾燥されて布地10の前記形状を保持する。織物10は,ガラス繊維等の耐熱繊維よりなり得る。   As shown in FIGS. 2 and 3, the heat shield cover 3 includes an inorganic fiber fabric 10 that is given a predetermined shape so as to be on the outer surface of the catalytic converter C. An aqueous mixture 11 of an inorganic binder, inorganic filler particles, and water is impregnated into the fabric 10 and dried to retain the shape of the fabric 10. The woven fabric 10 can be made of heat-resistant fibers such as glass fibers.

その布地10は,例えば,織物及び/又はニット状のうちの一つ又は任意の組合せなどの布地に加工されるのに好適な無機繊維(例えば,連続ガラス繊維,シリカ繊維,玄武岩繊維,多結晶繊維,加熱処理済み耐火性セラミック繊維又はこれらの組合せ)を含むことができる。布地10は,好ましくは織物,ニット状布地又はこれらの種類の布地の組合せを指す。充分な構造強度有する布地のみが本発明において有用である。例えば,混合物による含浸,成形,乾燥及び遮熱材としての使用に耐えるに充分な強度(例えば,引っ張り強度)を呈することが本発明による布地に望ましい。本発明による布地10は,同じ又は異なる種類の繊維から作製され得る。本明細書で説明するように,遮熱カバー3の布地10は,濡れてしなやかになるように,その厚さの全域にわたって,殆どにわたって,又は少なくとも大部分にわたって,水性混合物11で飽和され,浸漬され,コーティングされ,噴霧され,又は含浸される。この布地10は,遮熱カバー3の形状に成形される前又は後に,水性混合物11に含浸され得る。含浸後,遮熱カバー3はしなやかである。剛性の遮熱カバー3を形成すべく,これを乾燥させる。本明細書で使用する用語の「乾燥」は,しなやかな遮熱カバー3が,充分に高い温度で充分に長い時間にわたって加熱されて,しなやかな遮熱カバー(即ち,水性混合物)が硬化し,剛性の遮熱カバー(即ち,剛性混合物)になることを指す。   The fabric 10 may be an inorganic fiber (eg, continuous glass fiber, silica fiber, basalt fiber, polycrystalline, suitable for processing into a fabric such as one or any combination of woven and / or knit shapes, for example. Fiber, heat treated refractory ceramic fiber or combinations thereof). The fabric 10 preferably refers to a woven fabric, a knitted fabric or a combination of these types of fabrics. Only fabrics with sufficient structural strength are useful in the present invention. For example, it is desirable for a fabric according to the invention to exhibit sufficient strength (eg, tensile strength) to withstand impregnation with a mixture, molding, drying, and use as a heat shield. The fabric 10 according to the present invention may be made from the same or different types of fibers. As will be described herein, the fabric 10 of the thermal barrier cover 3 is saturated with the aqueous mixture 11 so that it becomes wet and supple, over most, most or at least most of its thickness. Coated, sprayed or impregnated. The fabric 10 can be impregnated with the aqueous mixture 11 before or after being formed into the shape of the heat shield cover 3. After impregnation, the heat shield cover 3 is supple. This is dried to form a rigid heat shield cover 3. As used herein, the term “drying” means that the supple heat shield cover 3 is heated at a sufficiently high temperature for a sufficiently long time to cure the supple heat shield cover (ie, the aqueous mixture), It refers to becoming a rigid heat shield cover (ie, a rigid mixture).

模範的な遮熱カバー3の布地10への含浸に使用される水性混合物は,典型的には,PCT国際出願公開WO2013/044012(A1)号(その全体が上記出願に組み込まれている。)に開示されているものゝような水,無機バインダ及び無機充填剤粒子を含むスラリーである。スラリー内の各成分の重量パーセントは変動し得るが,典型的には,所定のスラリーは,スラリーの合計重量に基づいて,約20.0重量パーセント(pbw)(及び1pbwごと増加させたもの)から約54.0を含みそれ以下の範囲(即ち,20.0pbw,21.0pbw,23.0pbw,24.0pbw,25.0pbw・・・49.0pbw,50.0pbw,51.0pbw,52.0pbw,53.0pbw,54.0pbw)及びそれらの任意の範囲(例えば,約25.0pbwから49.0pbwを含みそれ以下の範囲の水と,約1.0pbw(及び1pbwごと増加させたもの)から約36.0pbwを含みそれ以下の範囲とそれらの間の任意の範囲の一つの無機バインダと,約10.0pbw(及び1pbwごと増加させたもの)から約70.0pbwを含みそれ以下の範囲,及びそれらの間の範囲の無機充填剤粒子とを含む。例えば,所定のスラリーの合計重量に基づいて,約22.0pbwから約45.0pbwを含みそれ以下の水と,約5.0pbwから約30.0pbwを含みそれ以下の範囲の一以上の無機バインダと,約20.0pbwから約55.0pbwを含みそれ以下の無機充填剤粒子とを含むことができる。   The aqueous mixture used to impregnate the fabric 10 of the exemplary thermal barrier cover 3 is typically PCT International Application Publication No. WO 2013/044012 (A1), which is incorporated in its entirety into the above application. A slurry containing water, an inorganic binder and inorganic filler particles such as those disclosed in US Pat. The weight percent of each component in the slurry can vary, but typically a given slurry is about 20.0 weight percent (pbw) (and increased by 1 pbw) based on the total weight of the slurry. To about 54.0 and below (ie, 20.0 pbw, 21.0 pbw, 23.0 pbw, 24.0 pbw, 25.0 pbw ... 49.0 pbw, 50.0 pbw, 51.0 pbw, 52. 0 pbw, 53.0 pbw, 54.0 pbw) and any range thereof (eg, water ranging from about 25.0 pbw to 49.0 pbw and less, and about 1.0 pbw (and increased by 1 pbw)) One inorganic binder in the range including and below about 36.0 pbw and any range between them, and about 10.0 pbw (and increased by 1 pbw) From about 22.0 pbw to about 45, based on the total weight of a given slurry. 0.0pbw water or less, one or more inorganic binders in the range of about 5.0 pbw to about 30.0 pbw and less, and about 20.0 pbw to about 55.0 pbw of inorganic filler Particles.

遮熱カバー組成のそれらの重量パーセントを限定しようとするものではないが,それらのスラリーが含浸された遮熱カバーは,約1%(及び1%ごと増加させたもの)から約35%を含みそれ以下の範囲(即ち,1%,2%,3%,4%,5%・・・30%,31%,32%,33%,34%及び34%)及びそれらの間の任意の範囲(例えば,約5%から約30%を含みそれ以下の範囲)で無機バインダ粒子を含むことができる。それらのスラリーが含浸された布地で作製された遮熱カバーは,約5%(及び1%ごと増加させたもの)から約75%を含みそれ以下の範囲と,それらの間の任意の範囲で無機充填剤粒子を含むことができる。それらのスラリーが含浸された布地で作製された遮熱カバーは,約25%(及び1%ごと増加させたもの)から約65%を含みそれ以下の範囲と,それらの間の任意の範囲で無機繊維を含むことができる。尚,これらのパーセントは乾燥重量を基礎とする。   While not intending to limit their weight percentage of the thermal barrier cover composition, thermal barrier covers impregnated with those slurries contain from about 1% (and increased by 1%) to about 35%. Lower range (ie 1%, 2%, 3%, 4%, 5% ... 30%, 31%, 32%, 33%, 34% and 34%) and any range in between Inorganic binder particles can be included (for example, in a range including about 5% to about 30% or less). Thermal barrier covers made of fabric impregnated with those slurries range from about 5% (and increased by 1%) to about 75% and below, and any range in between. Inorganic filler particles can be included. Thermal barrier covers made of fabric impregnated with those slurries range from about 25% (and incremented by 1%) to about 65% and below, and any range in between. Inorganic fibers can be included. These percentages are based on dry weight.

無機バインダ材料の粒径に制限はないが,典型的には,無機バインダは,約200nmの最大粒径,好ましくは約100nmの最大粒径を有する無機バインダ粒子を含む。より典型的には,無機バインダは,約1.0nm(及び1nmごと増加させたもの)から約100nmを含みそれ以下,及びそれの間の任意の範囲の粒径を有する無機バインダ粒子を含む。例えば,無機粒子は,約4.0〜約60nmの粒径を有する無機バインダ粒子を含むことができる。   There is no limitation on the particle size of the inorganic binder material, but typically the inorganic binder comprises inorganic binder particles having a maximum particle size of about 200 nm, preferably a maximum particle size of about 100 nm. More typically, the inorganic binder comprises inorganic binder particles having a particle size ranging from about 1.0 nm (and increased by 1 nm) to about 100 nm and below, and any range therebetween. For example, the inorganic particles can include inorganic binder particles having a particle size of about 4.0 to about 60 nm.

さらにまた,無機充填剤粒子の粒径に制限はないが,典型的には,無機充填剤粒子は,約100ミクロン(μm)の最大粒径を有する。より典型的には,無機充填剤粒子は,約0.1μm(及び0.1μmごと増加させたもの)から約100μmを含みそれ以下の範囲,及びそれの間の任意の範囲の粒径を有することができる。例えば,無機充填剤粒子は,約0.2μmから約50μmの範囲の粒径を有することができる。   Furthermore, the particle size of the inorganic filler particles is not limited, but typically the inorganic filler particles have a maximum particle size of about 100 microns (μm). More typically, the inorganic filler particles have a particle size ranging from about 0.1 μm (and increased by 0.1 μm) to about 100 μm and below, and any range in between. be able to. For example, the inorganic filler particles can have a particle size in the range of about 0.2 μm to about 50 μm.

その布地10は,部分的又は完全に重なり合った多層にする重ねることができる。図示例では,含浸された布地10の二層が部分的に重なっている。布地10のかゝる多層の使用は特に望ましく,例えば,高遮熱性を要求される部分(例えば,触媒コンバータCの特に高温となる中央部を覆う遮熱カバー3の一部分)といった遮熱カバー3の部分において望ましいものであり得る。布地10の多層が望ましい他の領域としては,被締結部(例えば,前記透孔7を部分的に画定する図4に示される布地10のワッシャ形状部分を参照されたい。)のように追加的な強度及び/又は強靱性を要求される部分を挙げることができる。   The fabric 10 can be stacked in layers that are partially or completely overlapped. In the illustrated example, two layers of the impregnated fabric 10 partially overlap. The use of multiple layers of the fabric 10 is particularly desirable. For example, a portion of the heat shield cover 3 such as a portion that requires high heat shield properties (for example, a part of the heat shield cover 3 that covers a particularly high central portion of the catalytic converter C). It may be desirable in the part. Other areas where multiple layers of fabric 10 are desired are additional, such as a fastened portion (see, for example, the washer-shaped portion of fabric 10 shown in FIG. 4 that partially defines the through-hole 7). The part which requires the strong intensity | strength and / or toughness can be mentioned.

布地10には,必要に応じて複数のスリット状もしくは丸孔の放熱孔12が設けることができる。また布地10により形成される多くの目は,混合物11により埋められることなく,通風孔として残存し得る。   The fabric 10 can be provided with a plurality of slit-shaped or round heat-dissipating holes 12 as necessary. In addition, many eyes formed by the fabric 10 can remain as ventilation holes without being filled with the mixture 11.

次に,この実施形態の作用について説明する。   Next, the operation of this embodiment will be described.

内燃機関の排気系の触媒コンバータCは,内燃機関の運転中,排ガスを浄化し,その浄化反応熱により高温となるが,この触媒コンバータCの側面を遮熱カバー3が覆っているので,遮熱カバー3は,触媒コンバータCの輻射熱を遮り,触媒コンバータCに隣接する各種機器又は物体(例えば,触媒コンバータCの下方の地面にある有機物質)への熱害を防ぐことになる。   The catalytic converter C of the exhaust system of the internal combustion engine purifies the exhaust gas during operation of the internal combustion engine and becomes high temperature due to the purification reaction heat. However, since the heat shield cover 3 covers the side surface of the catalytic converter C, The heat cover 3 blocks the radiant heat of the catalytic converter C and prevents thermal damage to various devices or objects adjacent to the catalytic converter C (for example, organic substances on the ground below the catalytic converter C).

また遮熱カバー3は,遮音性にも優れており,触媒コンバータCで発生する排気音を効果的に遮断することができる。   The heat insulating cover 3 is also excellent in sound insulating properties, and can effectively block the exhaust noise generated by the catalytic converter C.

また触媒コンバータC周りで発生する熱気は,遮熱カバー3の放熱孔12や遮熱カバー3を構成する布地10の多数の目を通して外部に放散され,触媒コンバータCの過熱を防ぐことができる。   Further, the hot air generated around the catalytic converter C is dissipated to the outside through the heat radiation holes 12 of the heat shield cover 3 and the many eyes of the fabric 10 constituting the heat shield cover 3, and the catalytic converter C can be prevented from overheating.

その遮熱カバー3は,前述のように,耐熱繊維よりなる布地10と,それに含浸して乾燥した混合物11とで構成されるので,断熱性に優れており,隣接する各種機器への熱害を効果的に防ぐことができる。   As described above, the heat insulating cover 3 is composed of the fabric 10 made of heat-resistant fibers and the mixture 11 impregnated and dried, so that the heat insulating cover 3 is excellent in heat insulation, and heat damage to adjacent various devices. Can be effectively prevented.

またこの遮熱カバー3は,熱膨張係数が極めて小さい上,適度な柔軟性を有しているので,触媒コンバータCの熱膨張及び収縮に追従することができ,ボルト8による締結部に熱歪みが発生することもない。したがって,遮熱カバー3のボルト8による直接的締結が可能となり,コストの低減に寄与し得る。   Further, since the thermal insulation cover 3 has an extremely small coefficient of thermal expansion and has an appropriate flexibility, the thermal insulation cover 3 can follow the thermal expansion and contraction of the catalytic converter C. Does not occur. Therefore, direct fastening by the bolt 8 of the heat shield cover 3 is possible, which can contribute to cost reduction.

またこの遮熱カバー3は,絶縁性を有するので,ボルト8による締結部に電蝕が発生する心配もない。   Further, since the heat insulating cover 3 has an insulating property, there is no fear that electric corrosion occurs at the fastening portion by the bolt 8.

以下の材料の組合せの実施例は,本発明の可能な特徴,利点及び他の詳細をさらに例示するためだけに選択されたものである。しかしながら,実施例は,この目的を果たすが,特定の成分及び量,並びに他の条件及び詳細が本発明の範囲を不当に制限するように解釈されるものでないことは,明らかに理解されよう。
実施例
表1に示される材料は,本発明に従って使用することができる。
The following material combination examples have been selected only to further illustrate possible features, advantages and other details of the invention. However, while the examples serve this purpose, it will be clearly understood that the specific ingredients and amounts, as well as other conditions and details, should not be construed to unduly limit the scope of the present invention.
Examples The materials shown in Table 1 can be used according to the present invention.

Figure 2015117648
Figure 2015117648
Figure 2015117648
Figure 2015117648

スラリーは,上記に示されている成分を用いて調製することができる。各スラリーにおいて,無機材料を液体成分に添加して,高剪断ミキサーを用いて滑らかになるまで攪拌して,表2に示される所定のスラリーを形成することができる。   The slurry can be prepared using the components shown above. In each slurry, an inorganic material can be added to the liquid component and stirred using a high shear mixer until smooth to form the predetermined slurry shown in Table 2.

Figure 2015117648
Figure 2015117648
Figure 2015117648
Figure 2015117648
Figure 2015117648
Figure 2015117648

各模範的な布地10は,所定のスラリーに含浸されて,しなやかな遮熱カバー3を製作し,続いて下記のような乾燥/熱処理成形により成形お乾燥させて,剛性の遮熱カバー3にすることができる。   Each exemplary fabric 10 is impregnated with a predetermined slurry to produce a supple heat shield cover 3, and then molded and dried by the following drying / heat treatment molding to form a rigid heat shield cover 3. can do.

次に,図5を参照しながら,遮熱カバー3の模範的な製造方法について説明する。   Next, an exemplary method for manufacturing the heat shield cover 3 will be described with reference to FIG.

遮熱カバー3をプレス成形し得る上下一対の金型15,16を用意する。これら金型15,16には,ヒータ17,17が埋設されており,またこれら金型15,16の対向面には蒸気逃し溝18,18…が多数設けられる。   A pair of upper and lower molds 15 and 16 capable of press-molding the heat shield cover 3 are prepared. Heaters 17 and 17 are embedded in the molds 15 and 16, and a number of steam escape grooves 18, 18... Are provided on the opposing surfaces of the molds 15 and 16.

遮熱カバー3の成形に当たっては,先ず,下金型16上に,離型シート19(例えば,アルミ箔よりなる。)を敷く。この離型シート19には,混合物11中の水を加熱した際に逃がすための多数の蒸気逃がし孔を設けておく。この離型シート19上に,水性混合物11を含浸させた布地10を載置する。その際,前述のように,遮熱カバー3において高遮熱性を要求される部分や強度を要求される個所では,混合物11を含浸した布地10を多層にして載置する。   In forming the heat shield cover 3, first, a release sheet 19 (for example, made of aluminum foil) is laid on the lower mold 16. The release sheet 19 is provided with a number of steam escape holes for releasing water in the mixture 11 when heated. The fabric 10 impregnated with the aqueous mixture 11 is placed on the release sheet 19. At that time, as described above, the fabric 10 impregnated with the mixture 11 is placed in multiple layers at the portion of the heat insulating cover 3 where high heat insulating properties are required or where the strength is required.

また上記布地10の上に,上記と同様の離型シート19を敷いてから,図6に示すように,上金型15を下げて上記含浸済みの布地10を下金型16とで挟圧し,上記布地10に遮熱カバー3としての所定形状を付与すると共に,両金型15,16の協働により布地10に前記放熱スリット12,12…を穿設する。次いで,ヒータ17,17を作動して,布地10に含浸した混合物11を乾燥する。その際に発生する蒸気は,剥離シート19の蒸気逃し孔や金型15,16の蒸気逃し溝18,18…を通して金型15,16外に放出される。而して,乾燥,固化した混合物11は,金型15,16により付与された布地10の形状を保持し,布地10と共に遮熱カバー3を構成する。その後,上金型15を上昇させれば,遮熱カバー3を上下の離型シート19,19と共に両金型15,16間から取り出すことができる。而して,離型シート19,19は,混合物11が金型15,16に付着することを防ぎ,また離型シート19,19自体への混合物11の付着をも防ぐので,これを遮熱カバー3から容易に剥離することができる。   Further, a release sheet 19 similar to the above is laid on the fabric 10, and then the upper mold 15 is lowered and the impregnated fabric 10 is clamped with the lower mold 16 as shown in FIG. A predetermined shape as the heat insulating cover 3 is given to the fabric 10 and the heat dissipating slits 12 are formed in the fabric 10 by the cooperation of both molds 15 and 16. Next, the heaters 17 are operated to dry the mixture 11 impregnated in the fabric 10. The steam generated at that time is discharged out of the molds 15 and 16 through the steam release holes of the release sheet 19 and the steam release grooves 18 of the molds 15 and 16. Thus, the dried and solidified mixture 11 maintains the shape of the fabric 10 applied by the molds 15 and 16 and constitutes the heat shield cover 3 together with the fabric 10. Thereafter, if the upper mold 15 is raised, the heat shield cover 3 can be taken out between the molds 15 and 16 together with the upper and lower release sheets 19 and 19. Thus, the release sheets 19 and 19 prevent the mixture 11 from adhering to the molds 15 and 16, and also prevent the mixture 11 from adhering to the release sheets 19 and 19 themselves. The cover 3 can be easily peeled off.

このような製造方法によれば,上下一対の金型15,16によって,混合物11を含浸した布地10への形状付与及び混合物11の乾燥を行うことができ,遮熱カバー3を能率的に製造することができる。   According to such a manufacturing method, the pair of upper and lower molds 15 and 16 can impart the shape to the fabric 10 impregnated with the mixture 11 and dry the mixture 11, and efficiently manufacture the heat shield cover 3. can do.

本発明は上記実施形態に限定されるものではなく,その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば,複数枚重ねる布地10間に金網や多孔鋼板等の補強材を挟んでも,表面に補強材を設けてもよく,該補強材の材料は金属に限らず,耐熱性の樹脂でも,セラミックでもよい。また一個以上のボルト8に代えて,バンド等により遮熱カバー3を触媒コンバータCに取り付けることもできる。また離型シート19,19に代えて,金型15,16に離型パウダを使用することもできる。離型シート19,19は,また,金型15,16に付着するが遮熱カバー3には付着しない従来の離型剤のコーティングに代えてもよい。また遮熱カバーの形状は,排気系部品の種類や配置,隣接部材の配置に応じて自由に選定することができる。   The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, a reinforcing material such as a wire mesh or perforated steel sheet may be sandwiched between a plurality of stacked fabrics 10 or a reinforcing material may be provided on the surface. The material of the reinforcing material is not limited to metal, and may be a heat resistant resin or ceramic. Good. Further, the heat shield cover 3 can be attached to the catalytic converter C by a band or the like instead of the one or more bolts 8. In place of the release sheets 19 and 19, release powder can be used for the molds 15 and 16. The release sheets 19 and 19 may be replaced with a conventional release agent coating that adheres to the molds 15 and 16 but does not adhere to the heat shield cover 3. The shape of the heat shield cover can be freely selected according to the type and arrangement of exhaust system parts and the arrangement of adjacent members.

C・・・・・・排気系部品(触媒コンバータ)
3・・・・・・遮熱カバー
8・・・・・・取り付け部材(ボルト)
10・・・・・織物
11・・・・・粘土
15,16・・金型
19・・・・・離型手段(離型シート)
C ... Exhaust system parts (catalytic converter)
3 .... Heat shield cover 8 .... Mounting member (bolt)
10 ... Woven fabric 11 ... Clay 15, 16, ... Mold 19 ... Release means (release sheet)

Claims (9)

排気系部品(C)に隣接して,それを覆って取り付けられるように操作可能に適合された,排気系部品の遮熱カバーにおいて,
前記遮熱カバーが,所定の形状を付与される,無機繊維を含む布地(10)と,
この布地(10)に含浸させた混合物(11)とよりなり,
前記混合物が,無機バインダ,無機充填剤粒子及び水を含み,
前記混合物が,乾燥されて前記布地(10)の形状を保持するに充分な剛性となることを特徴とする,排気系部品の遮熱カバー。
In a heat-insulating cover for an exhaust system component that is operably adapted to be mounted adjacent to and covering the exhaust system component (C),
A fabric (10) containing inorganic fibers, wherein the heat shield cover is given a predetermined shape;
The fabric (10) and the mixture (11) impregnated,
The mixture comprises an inorganic binder, inorganic filler particles and water;
A heat insulation cover for exhaust system parts, characterized in that the mixture is dried and has sufficient rigidity to maintain the shape of the fabric (10).
請求項1に記載の排気系部品の遮熱カバーにおいて,
前記布地(10)には,多層に重ねた少なくとも一部分を設けたことを特徴とする,排気系部品の遮熱カバー。
The heat insulation cover for exhaust system parts according to claim 1,
A heat insulating cover for exhaust system parts, characterized in that the fabric (10) is provided with at least a part of multiple layers.
請求項1又は2に記載の排気系部品の遮熱カバーにおいて,
前記無機充填剤粒子が,水の存在下で前記無機バインダと混合されると,前記無機バインダの大部分が前記布地(10)の中に残るようにする任意の微粒子を含むことを特徴とする,排気系部品の遮熱カバー。
The heat insulation cover for exhaust system parts according to claim 1 or 2,
When the inorganic filler particles are mixed with the inorganic binder in the presence of water, the inorganic filler particles include any fine particles that cause most of the inorganic binder to remain in the fabric (10). , Heat insulation cover for exhaust system parts.
請求項1〜3の何れか一項に記載の排気系部品の遮熱カバーにおいて,
前記布地(10)が,織物,ニット状布地又はこれらの両方のタイプの組合せであることを特徴とする,排気系部品の遮熱カバー。
In the heat-insulating cover for exhaust system parts according to any one of claims 1 to 3,
Heat insulation cover for exhaust system parts, characterized in that the fabric (10) is a woven fabric, a knit fabric or a combination of both types.
請求項1〜4の何れか一項に記載の排気系部品の遮熱カバーにおいて,
前記遮熱カバーが,約1%〜約35%の範囲の無機バインダ粒子と,約5%〜約75%の範囲の無機充填剤粒子と,約25重量%〜約65重量%の範囲の前記布地の無機繊維とを含み,各百分率が乾燥重量基準であることを特徴とする,排気系部品の遮熱カバー。
In the heat insulation cover of the exhaust system parts according to any one of claims 1 to 4,
The thermal barrier cover comprises inorganic binder particles in the range of about 1% to about 35%, inorganic filler particles in the range of about 5% to about 75%, and the range of about 25% to about 65% by weight. Heat insulation cover for exhaust system parts, characterized in that it contains inorganic fibers of the fabric and each percentage is based on dry weight.
請求項1〜5の何れか一項に記載の排気系部品の遮熱カバーにおいて,
前記排気系部品(C)に隣接して前記遮熱カバーを取り付けるために使用される少なくとも一つの取り付け部材(8)をさらに含むことを特徴とする,排気系部品の遮熱カバー。
In the heat insulation cover of the exhaust system parts according to any one of claims 1 to 5,
The heat insulation cover for exhaust system parts, further comprising at least one attachment member (8) used for attaching the heat insulation cover adjacent to the exhaust system part (C).
排気系部品(C)と,この排気系部品(C)に隣接して,それを覆って取り付けられる請求項1〜6の何れか一項に記載の遮熱カバーとを含むことを特徴とする排気系。   It includes an exhaust system part (C) and the heat shield cover according to any one of claims 1 to 6, which is attached adjacent to and covers the exhaust system part (C). Exhaust system. 請求項1〜6の何れ一項に記載の遮熱カバーの製造方法において,
前記混合物(11)を含浸させた布地(10)を少なくとも一つの金型(15,16)により前記所定形状に成形する工程と,前記少なくとも一つの金型(15,16)を加熱して前記混合物(11)を乾燥して,前記布地(10)の形状を保持するに充分な剛性とする工程とを実行することを特徴とする,排気系部品の遮熱カバーの製造方法。
In the manufacturing method of the thermal-insulation cover as described in any one of Claims 1-6,
Forming the fabric (10) impregnated with the mixture (11) into the predetermined shape with at least one mold (15, 16); heating the at least one mold (15, 16); A method of manufacturing a heat insulating cover for exhaust system parts, comprising: drying the mixture (11) to make the mixture (10) rigid enough to maintain the shape of the fabric (10).
請求項8に記載の排気系部品の遮熱カバーの製造方法において,
前記金型(15,16)と前記織物(10)との間に,前記混合物(11)が付着し難い離型手段(19)を介在させることを特徴とする,排気系部品の遮熱カバーの製造方法。
In the manufacturing method of the thermal-insulation cover of the exhaust system components of Claim 8,
A heat shielding cover for exhaust system parts, characterized in that a mold release means (19) to which the mixture (11) is difficult to adhere is interposed between the molds (15, 16) and the fabric (10). Manufacturing method.
JP2013262042A 2013-12-19 2013-12-19 Heat shield cover for exhaust system parts and manufacturing method thereof Expired - Fee Related JP6294068B2 (en)

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