JP2003027958A - Engine cover, and method for manufacturing the same - Google Patents
Engine cover, and method for manufacturing the sameInfo
- Publication number
- JP2003027958A JP2003027958A JP2001213551A JP2001213551A JP2003027958A JP 2003027958 A JP2003027958 A JP 2003027958A JP 2001213551 A JP2001213551 A JP 2001213551A JP 2001213551 A JP2001213551 A JP 2001213551A JP 2003027958 A JP2003027958 A JP 2003027958A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- cover
- engine cover
- urethane foam
- resin
- 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
Links
Landscapes
- Molding Of Porous Articles (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発泡倍率が１．２
〜２．０のインジェクション成形による樹脂製カバーに
発泡ウレタン樹脂がエンジンの表面に圧接状態にて装着
できようにしたハイブリッドなエンジンカバーに関し、
特に発砲成形による樹脂製カバーによって製品の剛性を
高めて面振動を低減させ、ＮＶ値の低減が図れるエンジ
ンカバー及びその製造方法に関するものである。TECHNICAL FIELD The present invention has an expansion ratio of 1.2.
About a hybrid engine cover in which a urethane foam resin can be attached to the surface of the engine in a pressure contact state with a resin cover made by injection molding of ~ 2.0,
In particular, the present invention relates to an engine cover in which a resin cover formed by foam molding enhances the rigidity of a product to reduce surface vibration and an NV value can be reduced, and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】本願出願人は、特願２０００−２５２３
３９号にて、エンジンカバーの内側に、二液型発泡ウレ
タン樹脂組成物を充填発泡させることにより発泡ウレタ
ン樹脂層を形成させると共に該樹脂層をエンジンの表面
に圧接状態にて装着できるようにしたエンジンカバー及
びその製造方法を出願している。2. Description of the Related Art The applicant of the present application filed Japanese Patent Application No. 2000-2523.
In No. 39, a two-component urethane foam resin composition was filled and foamed inside the engine cover to form a urethane foam resin layer and the resin layer could be attached to the engine surface in a pressure contact state. An application has been filed for the engine cover and its manufacturing method.
【０００３】図３は、従来のエンジンカバーの断面図で
ある。従来のエンジンカバーは、樹脂又は金属製のカバ
ー１の裏面に、二液型発泡ウレタン樹脂組成物を常温発
泡させてエンジンの外表面の凹凸と同じ形状に形成して
なる発泡ウレタン樹脂層２部分が一体的に設けられてい
る。図中、４はカラー、６はワッシャー、７はボルトで
ある。また、前記のエンジンカバー１は、ポリエチレン
テレフタレート、ナイロン若しくはポリプロピレン樹脂
等からなる樹脂成形品や金属プレスによる成形品を用い
ている。FIG. 3 is a sectional view of a conventional engine cover. A conventional engine cover has a urethane foam resin layer 2 portion formed by foaming a two-component urethane foam resin composition at room temperature on the back surface of a resin or metal cover 1 to form the same shape as the irregularities on the outer surface of the engine. Are provided integrally. In the figure, 4 is a collar, 6 is a washer, and 7 is a bolt. As the engine cover 1, a resin molded product made of polyethylene terephthalate, nylon, polypropylene resin or the like or a molded product made by metal pressing is used.
【０００４】図４は、図３のＡ部の拡大縦断面図であ
り、エンジンカバー取付け部のフローティング構造を示
す。この図４に示すフローティング構造では、エンジン
カバーのボルト締付部位に開口１ａが設けられ、該開口
１ａ部には、Ｔ字状のカラー４を配置させ、二液型発泡
ウレタン樹脂組成物を常温発泡させることにより、カバ
ーの裏面には前記の発泡ウレタン樹脂層２を形成させる
と共に、カラー４の周りには発泡ウレタン樹脂によるフ
ローティング部位２ｂが形成されている。FIG. 4 is an enlarged vertical sectional view of the portion A in FIG. 3, showing a floating structure of the engine cover mounting portion. In the floating structure shown in FIG. 4, an opening 1a is provided in a bolt tightening portion of an engine cover, a T-shaped collar 4 is arranged in the opening 1a, and the two-component urethane foam resin composition is kept at room temperature. By foaming, the urethane foam resin layer 2 is formed on the back surface of the cover, and a floating portion 2b made of urethane foam resin is formed around the collar 4.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記樹
脂又は金属製のカバー１の裏面に発泡ウレタン樹脂を常
温発泡させたエンジンカバーにおいては、発泡体が多孔
質を有することによる吸音効果に加え、成形した発泡ウ
レタンがエンジンに圧接していることによる相手物の振
動を押さえる制振性と音の洩れを抑えるシール性の効果
が得られる。しかし、前記のカバー１自体は、一般的な
樹脂成形品や金属製のプレス成形品が用いられているか
ら、
（１）特に、樹脂製カバーにおいては、カバー自体の剛
性が低いため、面振動が高く、十分なＮＶ値の低減を図
ることができなかった。
（２）また、面振動を抑えるために、カバーの板厚を上
げる方法があるが、質量の増加、コストアップとなると
いう問題があった。
（３）また、金属製カバーに発泡成形をしたものでは、
用済み後の製品において、金属製のカバーと発泡充填物
とを分離するのが困難であるためリサイクルが出来ない
という問題もあった。However, in the engine cover in which the urethane foam resin is foamed at room temperature on the back surface of the cover 1 made of resin or metal, in addition to the sound absorbing effect due to the foam being porous, As a result, the urethane foam suppresses the vibration of the opponent due to the pressure contact with the engine, and the sealing effect that suppresses the sound leakage can be obtained. However, since the cover 1 itself is a general resin-molded product or a metal press-molded product, (1) In particular, in the resin-made cover, the rigidity of the cover itself is low, so that surface vibration However, the NV value could not be sufficiently reduced. (2) Further, there is a method of increasing the plate thickness of the cover in order to suppress the surface vibration, but there are problems that the mass increases and the cost increases. (3) Also, in the case where the metal cover is foam-molded,
There is also a problem that it is not possible to recycle the product after it has been used because it is difficult to separate the metal cover and the foamed filler.
【０００６】[0006]
【課題を解決するための手段】本発明は、エンジンカバ
ーを発泡成形により質量の増加を抑えて板厚を上げる事
で面振動を抑え、かつエンジンカバーの内側に、二液型
発泡ウレタン樹脂組成物を充填発泡させることにより発
泡ウレタン樹脂層を形成させると共に該樹脂層をエンジ
ンの表面に圧接状態にて装着できるようにし、且つ、エ
ンジンカバーの取付け部位をフローティング構造とする
ことにより、きわめて安価なコストで且つ騒音の低減効
果が極めて大きいエンジンカバー及びその製造方法の提
供を目的とすものである。SUMMARY OF THE INVENTION According to the present invention, an engine cover is foam-molded to suppress an increase in mass and increase a plate thickness to suppress surface vibration, and a two-component urethane foam resin composition is provided inside the engine cover. A urethane foam resin layer is formed by filling and foaming an object, and the resin layer can be attached to the surface of the engine in a pressure contact state, and a mounting structure of the engine cover has a floating structure. It is an object of the present invention to provide an engine cover and a method of manufacturing the engine cover that are cost effective and have an extremely large noise reduction effect.
【０００７】すなわち、請求項１に記載の発明は、発泡
倍率が１．２〜２．０のインジェクション成形による樹
脂製カバー１の裏面に、二液型発泡ウレタン樹脂組成物
を常温発泡させてエンジンの外表面の凹凸と同じ形状に
形成してなる発泡ウレタン樹脂層２を設け、該発泡ウレ
タン樹脂層２部分がエンジンの表面に圧接状態にて装着
できるようにしたことを特徴とするエンジンカバーであ
る。上記の発明によれば、エンジンカバーの裏面に形成
した発泡ウレタン樹脂層２部分がエンジンの表面に圧接
状態にて装着できるため、発泡体が多孔質を有すること
による吸音効果に加え、相手物の振動を押さえる制振性
と音の洩れを抑えるシール性の効果を高めることができ
る。That is, according to the first aspect of the invention, the two-component urethane foam resin composition is foamed at room temperature on the back surface of the resin cover 1 formed by injection molding with a foaming ratio of 1.2 to 2.0 to produce an engine. An engine cover characterized in that a urethane foam resin layer 2 formed in the same shape as the irregularities of the outer surface of the engine is provided, and the urethane foam resin layer 2 part can be attached to the surface of the engine in a pressed state. is there. According to the above invention, since the urethane foam resin layer 2 portion formed on the back surface of the engine cover can be attached to the front surface of the engine in a pressure contact state, in addition to the sound absorbing effect due to the foam having a porous structure, It is possible to enhance the effects of the vibration damping property for suppressing vibration and the sealing property for suppressing sound leakage.
【０００８】また、請求項２に記載の発明は、前記の樹
脂製カバー１は、熱硬化性樹脂または熱可塑性樹脂９０
〜７０重量％に対して、ガラス繊維長さ０．５〜５ｍｍ
の強化繊維を１０〜３０重量％含有する繊維強化熱可塑
性樹脂にて成形されたことを特徴とする請求項１記載の
エンジンカバーである。上記の発明によれば、製品の剛
性を更に高めて面振動を低減させることができる。According to the second aspect of the present invention, the resin cover 1 is made of a thermosetting resin or a thermoplastic resin 90.
~ 70% by weight, glass fiber length 0.5 ~ 5mm
The engine cover according to claim 1, wherein the engine cover is formed from a fiber-reinforced thermoplastic resin containing 10 to 30% by weight of the reinforcing fiber. According to the above invention, the rigidity of the product can be further increased and the surface vibration can be reduced.
【０００９】請求項３に記載の発明は、エンジンの外表
面の凹凸と同じ形状に形成した支持台３の上面に、二液
型発泡ウレタン樹脂組成物２ａを充填した後、所定の間
隔をもって発泡倍率が１．２〜２．０のインジェクショ
ン成形による樹脂製カバー１を重ねあわせ、前記の二液
型発泡ウレタン樹脂組成物２ａを常温発泡させて内部空
間を発泡ウレタン樹脂層２にて埋め尽くし、その後前記
の支持台３を剥離させてエンジンカバーを製造し、エン
ジンカバーの内側に形成された発泡ウレタン樹脂樹脂層
２部分がエンジンの表面に圧接状態にて装着できるよう
にしたことを特徴とするエンジンカバーの製造方法であ
る。上記の発明によれば、エンジンカバーの内面の形状
をエンジンの表面に合致させたエンジンカバーを安価な
コストで容易に生産することができる。According to the third aspect of the present invention, the two-component urethane foam resin composition 2a is filled on the upper surface of the support base 3 formed in the same shape as the unevenness of the outer surface of the engine, and then foamed at a predetermined interval. A resin cover 1 formed by injection molding with a magnification of 1.2 to 2.0 is overlaid, and the two-component urethane foam resin composition 2a is foamed at room temperature to fill the internal space with the urethane foam resin layer 2. After that, the support base 3 is peeled off to manufacture an engine cover, and the urethane foam resin layer 2 portion formed inside the engine cover can be attached to the surface of the engine under pressure. It is a method of manufacturing an engine cover. According to the above invention, an engine cover in which the shape of the inner surface of the engine cover matches the surface of the engine can be easily produced at low cost.
【００１０】[0010]
【発明の実施の形態】図１は、本発明のエンジンカバー
の縦断面図でる。本発明のエンジンカバーは、インジェ
クションによる発砲成形された樹脂製のカバー１の裏面
に、二液型発泡ウレタン樹脂組成物を常温発泡させてエ
ンジンの外表面の凹凸と同じ形状に形成してなる発泡ウ
レタン樹脂層２部分が一体的に設けられている。図中、
６はワッシャー、７はボルトである。なお、前記の発泡
ウレタン樹脂層２は、図示しないが、必要に応じてエン
ジンの表面に部分的に圧接するようにしてもよい。ま
た、前記のインジェクションによる発砲成形されるエン
ジンカバー１の材質としては、ポリエチレンテレフタレ
ート、ナイロン若しくはポリプロピレン樹脂等を用いる
ことができる。1 is a vertical sectional view of an engine cover according to the present invention. The engine cover of the present invention is formed by foaming a two-component urethane foam resin composition at room temperature on the back surface of a resin cover 1 formed by injection molding to form the same shape as the irregularities on the outer surface of the engine. The urethane resin layer 2 portion is integrally provided. In the figure,
6 is a washer and 7 is a bolt. Although not shown, the urethane foam resin layer 2 may be partially in pressure contact with the surface of the engine. Further, as the material of the engine cover 1 molded by the injection molding, polyethylene terephthalate, nylon, polypropylene resin or the like can be used.
【００１１】なお、前記のエンジンカバーの素材が、ポ
リエチレンテレフタレートやポリプロピレン樹脂の場合
は、後述する二液型発泡ウレタン樹脂との密着性を向上
させるために予めエンジンカバー１の内面にアンダーカ
ットや微細なキズを形成させるか、あるいはショットブ
ラストまたは絞加工による絞模様を賦形させる等により
アンカー効果を持たせるとよい。When the material of the engine cover is polyethylene terephthalate or polypropylene resin, an undercut or a fine cut is preliminarily formed on the inner surface of the engine cover 1 in order to improve the adhesion with the two-component urethane foam resin described later. It is advisable to provide an anchor effect by forming a slight scratch, or by forming a drawing pattern by shot blasting or drawing.
【００１２】本発明におけるエンジンカバー取付け部の
フローティング構造は、従来品と全く同じであり詳細な
説明を省略する。The floating structure of the engine cover mounting portion in the present invention is exactly the same as that of the conventional product, and its detailed description is omitted.
【００１３】また、二液型発泡ウレタン樹脂組成物２
は、例えば、特開平５−１１７３５７号公報に開示され
ている、ポリオールおよび発泡材としての水ガラスを含
む主材と、ポリイソシアネートからなる硬化材とにより
構成されたものである。A two-component urethane foam resin composition 2
Is composed of, for example, a main material containing a polyol and water glass as a foaming material and a hardening material made of polyisocyanate, which are disclosed in Japanese Patent Laid-Open No. 5-117357.
【００１４】次に、本発明のエンジンカバーの製造方法
を図２に基づいて説明する。なお、この図に示される支
持台３は、エンジンの外表面の凹凸と同じ形状に形成し
たものであり、この支持台３の製作に当たっては、まず
始めに石膏・ロー材等を用いてエンジンの形状を転写し
てモデル型を製作し、このモデル型にエポキシまたはシ
リコン樹脂を注入して固化させたものである。なお、前
記のモデル型を部分修正することにより、必要部位のみ
選択的に発泡させることもできる。Next, a method of manufacturing the engine cover of the present invention will be described with reference to FIG. The support base 3 shown in this figure is formed in the same shape as the irregularities on the outer surface of the engine, and when manufacturing the support base 3, first of all, a plaster, a brazing material or the like is used for the engine. The shape is transferred to produce a model die, and epoxy or silicon resin is injected into the model die and solidified. By partially modifying the model mold, it is possible to selectively foam only the necessary part.
【００１５】本発明のエンジンカバーの製造方法を、図
２を参照しながら以下に説明する。
始めに、支持台３の上面に離型剤（商品名：離型剤Ａ
−６３０−６、中京油脂（株）製）を吹き付ける。
次に、二液混合吐出機を用いて、二液型発泡ウレタン
樹脂組成物２ａを支持台３上面の中心付近に、発泡充填
分を流し込む。(図２ａ)
次に、支持台３の上面にカバー１をセットし、二液型
発泡ウレタン樹脂組成物２ａを常温で発泡させる（約２
０秒で発泡は完了する）。
発泡体の反応、安定を促進させるため８０℃１５分程
度加熱し、支持台３より完成品を取除く。A method of manufacturing the engine cover of the present invention will be described below with reference to FIG. First, a release agent (trade name: release agent A on the upper surface of the support base 3
-630-6, manufactured by Chukyo Yushi Co., Ltd., is sprayed. Next, using a two-liquid mixing and discharging machine, the two-liquid type urethane foam resin composition 2a is poured near the center of the upper surface of the support base 3 to fill the foam. (FIG. 2a) Next, the cover 1 is set on the upper surface of the support base 3 to foam the two-component urethane foam resin composition 2a at room temperature (about 2
Foaming is completed in 0 seconds). In order to promote the reaction and stability of the foam, it is heated at 80 ° C. for about 15 minutes, and the finished product is removed from the support 3.
【００１６】[0016]
【実験例】本発明者の実験によると、従来品の板厚１．
５ｍｍの樹脂製エンジンカバーに比べて、本発明品の発
泡倍率が１．２〜２．０のインジェクションによる発砲
成形された板厚３．０ｍｍ樹脂製のカバーでは、エンジ
ンベンチにて従来のエンジンカバーに対し騒音レベルを
約０．５ｄＢ低減させることができた。[Experimental example] According to the experiment by the present inventor, the thickness of the conventional product
Compared to a 5 mm resin engine cover, a 3.0 mm resin cover formed by injection molding with a foaming ratio of 1.2 to 2.0 of the present invention is a conventional engine cover on an engine bench. However, the noise level could be reduced by about 0.5 dB.
【００１７】[0017]
【発明の効果】本発明によると、発泡倍率が１．２〜
２．０のインジェクション成形による樹脂製カバー１の
裏面に、二液型発泡ウレタン樹脂組成物を常温発泡させ
てエンジンの外表面の凹凸と同じ形状に形成したもので
あるから、エンジンカバーの裏面に形成した発泡ウレタ
ン樹脂層２部分がエンジンの表面に圧接状態にて装着で
きるため、発泡体が多孔質を有することによる吸音効果
に加え、相手物の振動を押さえる制振性と音の洩れを抑
えるシール性の効果を高めることができる。According to the present invention, the expansion ratio is 1.2 to.
Since the two-component urethane foam resin composition was foamed at room temperature on the back surface of the resin cover 1 by injection molding of 2.0 to form the same shape as the unevenness on the outer surface of the engine, the back surface of the engine cover was formed. Since the formed urethane foam resin layer 2 part can be attached to the surface of the engine in a pressure contact state, in addition to the sound absorbing effect due to the foam having a porous structure, it also suppresses vibration of the opponent and suppresses sound leakage. The effect of sealing property can be enhanced.
【００１８】また、前記のインジェクション成形による
発泡樹脂製カバー１、熱硬化性樹脂または熱可塑性樹脂
９０〜７０重量％に対して、ガラス繊維長さ０．５〜５
ｍｍの強化繊維を１０〜３０重量％含有させたものにお
いては、さらにエンジンカバーの共振を抑制することが
できる。Further, with respect to the foamed resin cover 1 formed by the above-mentioned injection molding, 90 to 70% by weight of the thermosetting resin or the thermoplastic resin, the glass fiber length is 0.5 to 5
When the reinforcing fiber of mm is contained in an amount of 10 to 30% by weight, the resonance of the engine cover can be further suppressed.
【００１９】また、本発明のエンジンカバーの製造方法
によると、エンジンカバーの内面の形状をエンジンの表
面に合致させたエンジンカバーを安価なコストで容易に
生産することができる。Further, according to the method of manufacturing an engine cover of the present invention, an engine cover in which the shape of the inner surface of the engine cover matches the surface of the engine can be easily manufactured at low cost.
【図１】 本発明のエンジンカバーの縦断面図。FIG. 1 is a vertical cross-sectional view of an engine cover of the present invention.
【図２】 本発明のエンジンカバーの製造工程図。FIG. 2 is a process drawing of the engine cover of the present invention.
【図３】 従来のエンジンカバーの断面図。FIG. 3 is a sectional view of a conventional engine cover.
１ エンジンカバー ２ 発泡ウレタン樹脂層 ３ 支持台 1 engine cover 2 urethane foam resin layer 3 support
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ２９Ｌ 31:58 Ｂ２９Ｌ 31:58 Ｆターム(参考） 3D023 BA02 BA03 BB29 BD21 BE06 BE31 4F204 AA42 AD05 AD17 AE07 AG03 AG20 AH17 EA01 EA04 EB13 EF05 EL22 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) B29L 31:58 B29L 31:58 F term (reference) 3D023 BA02 BA03 BB29 BD21 BE06 BE31 4F204 AA42 AD05 AD17 AE07 AG03 AG20 AH17 EA01 EA04 EB13 EF05 EL22
Claims (3)
ョン成形による樹脂製カバー(１)の裏面に、二液型発泡
ウレタン樹脂組成物を常温発泡させてエンジンの外表面
の凹凸と同じ形状に形成してなる発泡ウレタン樹脂層
（２）を設け、該発泡ウレタン樹脂層（２）部分がエン
ジンの表面に圧接状態にて装着できるようにしたことを
特徴とするエンジンカバー。1. A two-component urethane foam resin composition is foamed at room temperature on the back surface of a resin cover (1) formed by injection molding with a foaming ratio of 1.2 to 2.0 to obtain the same roughness as the outer surface of the engine. An engine cover characterized in that a urethane foam resin layer (2) formed in a shape is provided, and the urethane foam resin layer (2) portion can be attached to the surface of the engine in a pressure contact state.
または熱可塑性樹脂９０〜７０重量％に対して、ガラス
繊維長さ０．５〜５ｍｍの強化繊維を１０〜３０重量％
含有する繊維強化熱可塑性樹脂にて成形されたことを特
徴とする請求項１記載のエンジンカバー。2. The resin cover (1) comprises 10 to 30% by weight of reinforcing fibers having a glass fiber length of 0.5 to 5 mm with respect to 90 to 70% by weight of thermosetting resin or thermoplastic resin.
The engine cover according to claim 1, wherein the engine cover is molded from the contained fiber-reinforced thermoplastic resin.
した支持台（３）の上面に、二液型発泡ウレタン樹脂組
成物（２ａ）を充填した後、所定の間隔をもって発泡倍
率が１．２〜２．０のインジェクション成形による樹脂
製カバー(１)を重ねあわせ、前記の二液型発泡ウレタン
樹脂組成物（２ａ）を常温発泡させて内部空間を発泡ウ
レタン樹脂層（２）にて埋め尽くし、その後前記の支持
台（３）を剥離させてエンジンカバーを製造し、エンジ
ンカバーの内側に形成された発泡ウレタン樹脂層（２）
部分がエンジンの表面に圧接状態にて装着できるように
したことを特徴とするエンジンカバーの製造方法。3. A two-component urethane foam resin composition (2a) is filled on the upper surface of a support base (3) formed in the same shape as the unevenness of the outer surface of the engine, and the expansion ratio is 1 at a predetermined interval. The resin cover (1) formed by injection molding of 2 to 2.0 is overlaid, and the two-component urethane foam resin composition (2a) is foamed at room temperature to form an internal space in the urethane foam resin layer (2). The engine cover is manufactured by completely filling it and then peeling off the supporting base (3), and a urethane foam resin layer (2) formed inside the engine cover.
A method of manufacturing an engine cover, characterized in that a portion of the engine cover can be attached to the surface of the engine in a pressed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001213551A JP2003027958A (en) | 2001-07-13 | 2001-07-13 | Engine cover, and method for manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001213551A JP2003027958A (en) | 2001-07-13 | 2001-07-13 | Engine cover, and method for manufacturing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003027958A true JP2003027958A (en) | 2003-01-29 |
Family
ID=19048504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001213551A Pending JP2003027958A (en) | 2001-07-13 | 2001-07-13 | Engine cover, and method for manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003027958A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019211493A (en) * | 2018-05-31 | 2019-12-12 | 株式会社イノアックコーポレーション | Sound insulating material and manufacturing method of the same |
| JP2021014196A (en) * | 2019-07-12 | 2021-02-12 | 株式会社イノアックコーポレーション | Engine room cover |
-
2001
- 2001-07-13 JP JP2001213551A patent/JP2003027958A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019211493A (en) * | 2018-05-31 | 2019-12-12 | 株式会社イノアックコーポレーション | Sound insulating material and manufacturing method of the same |
| JP7219019B2 (en) | 2018-05-31 | 2023-02-07 | 株式会社イノアックコーポレーション | soundproof material |
| JP2021014196A (en) * | 2019-07-12 | 2021-02-12 | 株式会社イノアックコーポレーション | Engine room cover |
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