JPH09267355A - Manufacture of sound insulation cover - Google Patents
Manufacture of sound insulation coverInfo
- Publication number
- JPH09267355A JPH09267355A JP10366796A JP10366796A JPH09267355A JP H09267355 A JPH09267355 A JP H09267355A JP 10366796 A JP10366796 A JP 10366796A JP 10366796 A JP10366796 A JP 10366796A JP H09267355 A JPH09267355 A JP H09267355A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- skin
- pores
- absorbing material
- sound absorbing
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000009413 insulation Methods 0.000 title claims description 6
- 239000011148 porous material Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 239000011358 absorbing material Substances 0.000 claims description 32
- 239000011347 resin Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000012814 acoustic material Substances 0.000 abstract 5
- 238000000465 moulding Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
- B29C45/14795—Porous or permeable material, e.g. foam
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14155—Positioning or centering articles in the mould using vacuum or suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0001—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties
- B29K2995/0002—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular acoustical properties insulating
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は自動車のエンジン
遮音用等に用いられる遮音カバーの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a sound insulation cover used for, for example, sound insulation of an automobile engine.
【０００２】[0002]
【従来の技術】遮音カバーは多くは樹脂板に微細孔を有
する多孔質ウレタン材などを吸音材として固着したもの
である。このような遮音カバーを製造するには図２
（ａ）に示すように対向する１対の金型１、２の一方の
金型１の表面に多孔質ウレタン材等でなる吸音材３を適
宜の方法例えば粘着テープ等で固定し、次に図２（ｂ）
のように他方の金型２を接近させて型締めし、キャビテ
ィ面４と吸音材３との間の隙間に溶融樹脂５を図３
（ｃ）のように射出し、溶融樹脂５が固化するとき吸音
材３が溶融樹脂５に固着されるようにし、固化後成形品
を離型するものである。2. Description of the Related Art In many cases, a sound insulating cover is made by fixing a porous urethane material having fine holes to a resin plate as a sound absorbing material. To manufacture such a sound insulation cover, please refer to FIG.
As shown in (a), a sound absorbing material 3 made of a porous urethane material or the like is fixed to the surface of one of the pair of molds 1 and 2 facing each other by an appropriate method, for example, an adhesive tape or the like. Figure 2 (b)
As shown in FIG. 3, the other mold 2 is brought close to the mold and the mold is clamped, and the molten resin 5 is filled in the gap between the cavity surface 4 and the sound absorbing material 3.
The injection is performed as in (c), and when the molten resin 5 is solidified, the sound absorbing material 3 is fixed to the molten resin 5, and the molded product is released after solidification.
【０００３】[0003]
【発明が解決しようとする課題】このような製造方法に
おいて、吸音材３は多孔質のものであり、溶融樹脂５の
射出時の射出圧と型締め圧によって吸音材３が図２
（ｃ）の３ａのように圧縮され、その微細孔が潰されて
しまい、その状態のまま離型するから、吸音材３の多孔
性が損なわれ吸音作用が低下してしまう。In such a manufacturing method, the sound absorbing material 3 is porous, and the sound absorbing material 3 is formed by the injection pressure and the mold clamping pressure when the molten resin 5 is injected.
Since it is compressed like 3a in (c), its fine pores are crushed, and the mold is released in that state, the porosity of the sound absorbing material 3 is impaired and the sound absorbing action is reduced.
【０００４】[0004]
【課題を解決するための手段】この発明は、対向する金
型の一方に、金型を貫通する多数の細孔と、出入自由に
金型表面から突出する多数のインジェクションピンとを
設け、表皮付吸音材を金型表面に載置して、表皮側で細
孔の表面側開口端を覆うようにし、細孔の背面側開口端
から空気を吸引して負圧により表皮付吸音材を金型表面
に固定し、対向する他方の金型を接近させて型締めし、
他方の金型のキャビティ面と表皮付吸音材との間の隙間
に溶融樹脂を射出し、樹脂の固化後他方の金型を後退さ
せ、その際まず細孔から空気を吸引して表皮付吸音材の
表皮側を一方の金型表面への吸着状態に維持し、続いて
他方の金型を後退させながらインジェクションピンを突
出させて表皮付吸音材を一方の金型から離型し、この際
細孔からの負圧吸引は停止する。さらに他方の金型を後
退させて成形品を取り出すものである。SUMMARY OF THE INVENTION According to the present invention, one of opposing molds is provided with a large number of pores penetrating the mold and a large number of injection pins projecting freely from the mold surface, and with a skin. Place the sound absorbing material on the surface of the mold so that the surface side of the pore covers the open end of the pore, suck air from the open end of the pore on the back side of the pore, and mold the sound absorbing material with the skin by negative pressure. Fix it on the surface, close the other mold facing each other, and clamp the mold.
Molten resin is injected into the gap between the cavity surface of the other mold and the sound absorbing material with skin, and the other mold is retracted after the resin has solidified. At that time, air is first sucked from the pores to absorb sound with skin. While keeping the skin side of the material adsorbed on the surface of one mold, the injection pin is projected while the other mold is retracted to release the sound absorbing material with skin from one mold. Negative pressure suction from the pores is stopped. Further, the other mold is retracted to take out the molded product.
【０００５】[0005]
【発明の実施の形態】図１にこの発明の実施形態の例を
示す。図１（ａ）のように対向する１対の金型１０、１
１の一方の金型１０には、その表面１０ａから背面へ貫
通する多数の細孔１２と、出入自在に表面１０ａ側へ突
出する多数のインジェクションピン１３が設けられてい
る。細孔１２は背面側で集約されて真空ポンプ１５に接
続される。また各インジェクションピン１３は適宜の機
械的レバーあるいは空気圧によって一斉に金型１０の表
面１０ａから突出しあるいは埋没するよう出入作動する
ように、操作機構（図示しない）を備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of an embodiment of the present invention. A pair of molds 10 and 1 facing each other as shown in FIG.
One of the molds 10 is provided with a large number of pores 12 penetrating from the surface 10a to the back surface and a large number of injection pins 13 projecting toward the front surface 10a side so as to be freely inserted and removed. The pores 12 are collected on the back side and connected to the vacuum pump 15. Further, each injection pin 13 is provided with an operation mechanism (not shown) so as to be operated by an appropriate mechanical lever or air pressure so as to project or be buried in the surface 10a of the mold 10 all at once.
【０００６】金型１０の表面１０ａに表皮付吸音材１７
を載置し、その表皮１９で細孔１２の表面１０ａ側開口
端を覆い真空ポンプ１５を作動させることにより細孔１
２を介して負圧で表皮付吸音材１７を金型１０の表面１
０ａに吸着し固定する。表皮付吸音材１７の吸音材部分
１８は微細な孔を有する多孔質の発泡ウレタン材でな
り、表皮１９は厚さ約１００μｍのポリエチレンフィル
ムを貼付して形成したものである。この表皮１９は薄膜
であり、吸音材部分１８の微細孔による吸音作用を妨げ
ない。またこれらの素材はこの例のものに限定されずア
ルミ膜等適宜のものでよい。A sound absorbing material 17 with a skin is formed on the surface 10a of the mold 10.
On the surface 10a side of the pore 12 with its skin 19, and the vacuum pump 15 is operated to operate the pore 1
The sound absorbing material 17 with the skin is attached to the surface 1 of the mold 10 by a negative pressure via
Adsorb to 0a and fix. The sound absorbing material portion 18 of the sound absorbing material with skin 17 is made of a porous urethane foam material having fine pores, and the skin 19 is formed by sticking a polyethylene film having a thickness of about 100 μm. The skin 19 is a thin film and does not prevent the sound absorbing action of the fine holes of the sound absorbing material portion 18. Further, these materials are not limited to those in this example, and may be an appropriate material such as an aluminum film.
【０００７】次に図１（ｂ）のように金型１１を前進さ
せて所定位置に型締めし、金型１１のキャビティ２０と
吸音材部分１８との間の所定の隙間に溶融樹脂２１を射
出する。この段階で射出圧と固定された型締出が作用
し、吸音材部分１８は圧縮され微細孔が潰れた１８ａと
なり、この状態で溶融樹脂２１が固化する。Next, as shown in FIG. 1B, the mold 11 is advanced and clamped at a predetermined position, and a molten resin 21 is placed in a predetermined gap between the cavity 20 of the mold 11 and the sound absorbing material portion 18. To eject. At this stage, the injection pressure and the fixed mold clamping act, the sound absorbing material portion 18 is compressed and becomes the fine holes crushed into 18a, and the molten resin 21 is solidified in this state.
【０００８】固化後金型１１を後退させるにあたり、真
空ポンプ１５を作動させて表皮付吸音材１７の表皮１９
を細孔１２の負圧によって吸引し、金型１０の表面１０
ａへ吸着された状態に維持する。このようにすれば金型
１１の後退に伴ない圧縮されていた吸音材部分１８ａ
は、引張られてもとの厚さを回復し吸音材部分１８の多
孔状態に復元される。Upon retreating the mold 11 after solidification, the vacuum pump 15 is operated to operate the skin 19 of the sound absorbing material 17 with skin.
Are sucked by the negative pressure of the pores 12, and the surface 10 of the mold 10
The state of being adsorbed on a is maintained. In this way, the sound absorbing material portion 18a that was compressed as the mold 11 retracted
When pulled, the original thickness is restored and the porous state of the sound absorbing material portion 18 is restored.
【０００９】続いて操作機構を作動させてインジェクシ
ョンピン１３を突出させて表皮付吸音材１７を表面１０
ａから離型させ、図１（ｃ）のようにキャビティ２１か
ら成形品２２を取外す。その後ランナ部２３やバリを切
除する等の仕上作業により遮音板（図示しない）を完成
させる。Then, the operating mechanism is operated to cause the injection pin 13 to project so that the sound absorbing material 17 with the skin is attached to the surface 10.
The mold is released from a, and the molded product 22 is removed from the cavity 21 as shown in FIG. Thereafter, a sound insulating plate (not shown) is completed by finishing work such as cutting off the runner portion 23 and burrs.
【００１０】[0010]
【発明の効果】この発明の製造方法では表皮付吸音材を
負圧で吸引することにより、金型内への表皮付吸音材の
固定が容易確実になるばかりでなく、離型時にインジェ
クションピンの突き出しによって製品の離型、取り出し
が容易になる。さらに完成した遮音板は射出圧による吸
音材部分の潰れが離型時の負圧吸引により復元するので
所期通りの吸音作用が得られる。EFFECT OF THE INVENTION In the manufacturing method of the present invention, by sucking the skin-absorbing sound absorbing material with a negative pressure, not only the fixing of the skin-absorbing sound absorbing material in the mold becomes easy and reliable, but also the injection pin The protrusion makes it easy to release and take out the product. Furthermore, since the completed sound insulation plate is crushed by the injection pressure, the sound absorbing material part is restored by negative pressure suction at the time of mold release, so that the desired sound absorbing effect can be obtained.
【図１】実施態様の主な工程を示す図。FIG. 1 is a diagram showing main steps of an embodiment.
【図２】従来の製造方法の主な工程を示す図。FIG. 2 is a diagram showing main steps of a conventional manufacturing method.
【符号の説明】 １０、１１ 金型 １２ 細孔 １３ インジェクションピン １７ 表皮付吸音材 １８ 吸音材部分 １９ 表皮 ２１ 溶融樹脂[Explanation of Codes] 10, 11 Mold 12 Pore 13 Injection Pin 17 Sound Absorbing Material with Skin 18 Sound Absorbing Material Part 19 Skin 21 Molten Resin
Claims (1)
多数の細孔と、出入自在に金型表面から突出する多数の
インジェクションピンとを設け、表皮付吸音材を金型表
面に載置して、その表皮側で細孔の表面側開口端を覆う
ようにし、細孔の背面側開口端から空気を吸引して負圧
により表皮付吸音材を金型表面に固定し、対向する他方
の金型を接近させて型締めし、他方の金型のキャビティ
面と表皮付吸音材との間の隙間に溶融樹脂を射出し、樹
脂の固化後他方の金型を後退させ、その際まず細孔から
空気を吸引して表皮付吸音材の表皮側を一方の金型表面
への吸着状態を維持し、続いて他方の金型を後退させな
がらインジェクションピンを突出させて表皮付吸音材を
一方の金型表面から離型し、さらに他方の金型を後退さ
せて成形品を取り出す遮音カバーの製造方法。1. A sound-absorbing material with a skin is mounted on the surface of a mold, wherein one of the molds facing each other is provided with a large number of pores penetrating the mold and a large number of injection pins projecting freely from the mold surface. The surface side of the pores to cover the opening side of the pores on the skin side, suck air from the opening side of the pores on the back side of the pores, and fix the sound absorbing material with the skin to the mold surface by negative pressure to face it. The other mold is moved closer to the other mold and the mold is clamped.The molten resin is injected into the gap between the cavity surface of the other mold and the sound absorbing material with skin, and the other mold is retracted after the resin is solidified. First, air is sucked from the pores to keep the skin side of the sound absorbing material with the skin adsorbed on the surface of one mold, and then the injection pin is projected while the other mold is retracted to make the sound absorbing material with the skin. From the surface of one mold, and then retract the other mold to take out the molded product. Sound insulation cover manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10366796A JPH09267355A (en) | 1996-03-29 | 1996-03-29 | Manufacture of sound insulation cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10366796A JPH09267355A (en) | 1996-03-29 | 1996-03-29 | Manufacture of sound insulation cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09267355A true JPH09267355A (en) | 1997-10-14 |
Family
ID=14360147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10366796A Pending JPH09267355A (en) | 1996-03-29 | 1996-03-29 | Manufacture of sound insulation cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09267355A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287768A (en) * | 2001-03-28 | 2002-10-04 | Nichias Corp | Molded soundproofing material and method of manufacturing the same |
| JP2019138164A (en) * | 2018-02-06 | 2019-08-22 | 株式会社キーレックス | Assembly device and assembly method for heat insulator |
| CN111531819A (en) * | 2019-02-06 | 2020-08-14 | 发那科株式会社 | Ejection mechanism of injection molding machine |
-
1996
- 1996-03-29 JP JP10366796A patent/JPH09267355A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287768A (en) * | 2001-03-28 | 2002-10-04 | Nichias Corp | Molded soundproofing material and method of manufacturing the same |
| JP2019138164A (en) * | 2018-02-06 | 2019-08-22 | 株式会社キーレックス | Assembly device and assembly method for heat insulator |
| CN111531819A (en) * | 2019-02-06 | 2020-08-14 | 发那科株式会社 | Ejection mechanism of injection molding machine |
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