JPH05329886A - Sandwich injection molding method - Google Patents
Sandwich injection molding methodInfo
- Publication number
- JPH05329886A JPH05329886A JP13500292A JP13500292A JPH05329886A JP H05329886 A JPH05329886 A JP H05329886A JP 13500292 A JP13500292 A JP 13500292A JP 13500292 A JP13500292 A JP 13500292A JP H05329886 A JPH05329886 A JP H05329886A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- fiber
- reinforced resin
- fiber reinforced
- cavity
- 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.)
- Granted
Links
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
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
-
- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/16—Fillers
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出成形法、特にコア
層をスキン層で全体的に包み込んでなるサンドイッチ成
形体を製造するための技術に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection molding method and, more particularly, to a technique for producing a sandwich molded article in which a core layer is entirely wrapped with a skin layer.
【０００２】[0002]
【従来の技術】サンドイッチ射出成形方法が従来から特
開昭６４ー１６６２１号公報により知られている。この
特開昭６４ー１６６２１号公報に示されたサンドイッチ
射出成形方法は、スキン層に短繊維強化樹脂、コア層に
長繊維強化樹脂を配して繊維強化サンドイッチ射出成形
品を得るようになっている。2. Description of the Related Art A sandwich injection molding method is conventionally known from JP-A-64-16621. In the sandwich injection molding method disclosed in Japanese Patent Laid-Open No. 64-16621, a short fiber reinforced resin is arranged in the skin layer and a long fiber reinforced resin is arranged in the core layer to obtain a fiber reinforced sandwich injection molded article. There is.
【０００３】[0003]
【発明が解決しようとする課題】ところで、繊維強化樹
脂は繊維材によって成形品の強度を向上させるために使
用され、繊維長が長いほど、また、同一方向に配向して
いるほど成形品強度が強いものである。そして、長繊維
強化樹脂単層の射出成形品である長繊維強化樹脂射出成
形品２０では図８に示すように、成形品表面付近は長繊
維材１ａが流動方向に配向するが成形品の厚み方向の中
心部分では配向が乱れることが実験によりわかってい
る。したがって、表面付近の強度に比べて厚み方向の中
心部分の強度の低下率が大きいという問題がある。By the way, the fiber reinforced resin is used to improve the strength of the molded product by the fiber material. The longer the fiber length and the more oriented in the same direction, the stronger the molded product. It is a strong one. In the long fiber reinforced resin injection-molded product 20 which is a single-layer long fiber reinforced resin injection-molded product, as shown in FIG. 8, the long fiber material 1a is oriented in the flow direction near the surface of the molded product, but the thickness of the molded product is small. Experiments show that the orientation is disturbed in the central part of the direction. Therefore, there is a problem that the strength reduction rate of the central portion in the thickness direction is larger than the strength near the surface.
【０００４】また、短繊維強化樹脂単層の射出成形品で
ある長繊維強化樹脂射出成形品２１では図９に示すよう
に、成形品表面付近は長繊維強化樹脂と同じく短繊維材
３ａが流動方向に配向し、また、成形品の厚み方向の中
心部分での配向は長繊維強化樹脂ほど乱れがないこと
が、別の実験によりわかっている。したがって、厚み方
向の中心部分の強度の低下率は長繊維強化樹脂よりは小
さいが表面付近の強度は長繊維強化樹脂に比べて低いの
が欠点である。Further, in the long fiber reinforced resin injection molded product 21 which is an injection molded product of a single layer of short fiber reinforced resin, as shown in FIG. 9, the short fiber material 3a flows near the surface of the molded product as in the long fiber reinforced resin. It is known from another experiment that the resin is oriented in the same direction, and the orientation at the central portion in the thickness direction of the molded product is not as disturbed as that of the long fiber reinforced resin. Therefore, the reduction rate of the strength of the central portion in the thickness direction is smaller than that of the long fiber reinforced resin, but the strength near the surface is lower than that of the long fiber reinforced resin.
【０００５】しかるに上記した特開昭６４ー１６６２１
号公報に示された従来のサンドイッチ射出成形を用いて
繊維強化成形品を得る従来の方法では長繊維強化射出成
形品２０、短繊維強化射出成形品２１それぞれの強度的
に弱い部分を積層しているために十分な強度が得られな
いという問題があった。本発明は上記の従来例の問題点
に鑑みて発明したものであって、その目的とするところ
は、強度の強い繊維強化樹脂のサンドイッチ成形体を簡
単に製造できるサンドイッチ射出成形方法を提供するに
ある。However, the above-mentioned Japanese Patent Laid-Open No. 64-16621.
According to the conventional method for obtaining a fiber reinforced molded product by using the conventional sandwich injection molding disclosed in Japanese Patent Publication No. 1989, the long fiber reinforced injection molded product 20 and the short fiber reinforced injection molded product 21 are laminated with weak portions. However, there is a problem that sufficient strength cannot be obtained. The present invention has been made in view of the above-mentioned problems of the conventional example, and an object thereof is to provide a sandwich injection molding method capable of easily manufacturing a sandwich molded body of a fiber-reinforced resin having high strength. is there.
【０００６】[0006]
【課題を解決するための手段】本発明のサンドイッチ射
出成形方法は、長繊維材１ａを含む第１の樹脂１をキャ
ビティ２に注入し、第１の樹脂１が未硬化のタイミング
において短繊維材３ａを含む第２の樹脂３をキャビティ
２に注入して、第１の樹脂１がスキン層となり第２の樹
脂３がコア層となるような成形を行うことを特徴とする
ものである。According to the sandwich injection molding method of the present invention, a first resin 1 containing a long fiber material 1a is injected into a cavity 2, and a short fiber material is produced at a timing when the first resin 1 is uncured. The second resin 3 containing 3a is injected into the cavity 2, and molding is performed so that the first resin 1 serves as a skin layer and the second resin 3 serves as a core layer.
【０００７】[0007]
【作用】本発明の方法によれば、長繊維材１ａを含む第
１の樹脂１をキャビティ２に注入し、第１の樹脂１が未
硬化のタイミングにおいて短繊維材３ａを含む第２の樹
脂３をキャビティ２に注入して、第１の樹脂１がスキン
層となり第２の樹脂３がコア層となるような成形を行う
ことで、長繊維強化射出成形品、短繊維強化射出成形品
の強度的に優れた部分を組み合わせた繊維強化サンドイ
ッチ射出成形品４を製造できるようになったものであ
る。According to the method of the present invention, the first resin 1 containing the long fiber material 1a is injected into the cavity 2, and the second resin containing the short fiber material 3a is added at a timing when the first resin 1 is uncured. 3 is injected into the cavity 2, and molding is performed so that the first resin 1 serves as the skin layer and the second resin 3 serves as the core layer, so that long-fiber reinforced injection molded products and short fiber-reinforced injection molded products can be produced. The fiber-reinforced sandwich injection-molded product 4 having a combination of parts having excellent strength can be manufactured.
【０００８】[0008]
【実施例】以下、本発明を添付図面に示す実施例に基づ
いて詳述する。図１乃至図３には繊維強化サンドイッチ
射出成形品４の製造順序を示す一実施例が示してあり、
また、図４乃至図６には製造順序を示す他の実施例が示
してある。そして、上記各実施例においては固定金型１
３と可動金型１２とよりなる金型７のキャビティ２が板
状をした繊維強化サンドイッチ射出成形品４を製造する
形状をしているが、必ずしもこれにのみ限定されず、い
かなるキャビティ２形状であってもよいものである。と
ころで、本発明では長繊維材１ａを含む第１の樹脂１
（以下長繊維強化樹脂１という）とは、長繊維材が径１
０〜１００μｍ、長さ３〜１０ｍｍで、繊維重量含有率
１０〜８０％のものを意味し、短繊維材１ｂを含む第２
の樹脂３（以下短繊維強化樹脂３という）とは、短繊維
材が１０〜１００μｍ、長さ１０μｍ〜１ｍｍで、繊維
重量含有率１０〜８０％のものを意味している。また、
図に示す実施例では成形される成形品である繊維強化サ
ンドイッチ射出成形品４の厚みが１〜１０ｍｍのものを
示している。また、添付図面に示す実施例では成形装置
５のノズル８が同心状に配置したノズル外側部９とノズ
ル内側部１０との２重構造により構成してあり、金型７
の１個のスプルー１１よりノズル外側部９から供給され
るスキン層を形成するための長繊維強化樹脂１、ノズル
内側部１０から供給されるコア層を形成するための短繊
維強化樹脂３を射出する方式を示しているが、金型７に
別々のスプルーを設けて別々のスプルーからスキン層、
コア層を射出して金型７内でサンドイッチ状にする方式
でもよいものである。なお、添付図面において、１２は
長繊維強化樹脂を入れたホッパ、１３は長繊維強化樹脂
射出用シリンダー、１４は長繊維強化樹脂射出用スクリ
ュー、１５は短繊維強化樹脂を入れたホッパ、１６は短
繊維強化樹脂射出用シリンダー、１７は短繊維強化樹脂
射出用スクリューである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. 1 to 3 show an embodiment showing the manufacturing sequence of the fiber-reinforced sandwich injection-molded product 4,
Further, FIGS. 4 to 6 show another embodiment showing the manufacturing sequence. The fixed mold 1 is used in each of the above embodiments.
Although the cavity 2 of the mold 7 including the movable mold 3 and the movable mold 12 is shaped to manufacture the plate-shaped fiber-reinforced sandwich injection-molded product 4, the shape is not necessarily limited to this, and any shape of the cavity 2 can be used. It is possible to have. By the way, in the present invention, the first resin 1 containing the long fiber material 1a is used.
(Hereinafter referred to as long fiber reinforced resin 1) means that the long fiber material has a diameter of 1
A second fiber having a length of 3 to 10 mm, a fiber weight content of 10 to 80%, and a short fiber material 1b.
The resin 3 (hereinafter referred to as short fiber reinforced resin 3) means that the short fiber material is 10 to 100 μm, the length is 10 μm to 1 mm, and the fiber weight content is 10 to 80%. Also,
In the illustrated embodiment, the fiber-reinforced sandwich injection-molded product 4 which is a molded product to be molded has a thickness of 1 to 10 mm. Further, in the embodiment shown in the accompanying drawings, the nozzle 8 of the molding apparatus 5 is constituted by a double structure of a nozzle outer side portion 9 and a nozzle inner side portion 10 which are concentrically arranged.
From one sprue 11, a long fiber reinforced resin 1 for forming a skin layer supplied from the nozzle outer portion 9 and a short fiber reinforced resin 3 for forming a core layer supplied from the nozzle inner portion 10 are injected. Although a method of doing so is shown, a separate sprue is provided in the mold 7 and the skin layer is formed from the separate sprue,
A method of injecting the core layer to form a sandwich in the mold 7 may be used. In the attached drawings, 12 is a hopper containing long fiber reinforced resin, 13 is a cylinder for long fiber reinforced resin injection, 14 is a screw for long fiber reinforced resin injection, 15 is a hopper with short fiber reinforced resin, and 16 is a hopper. A short fiber reinforced resin injection cylinder, and 17 are short fiber reinforced resin injection screws.
【０００９】次に、図１乃至図３に基づいて本発明の一
実施例を具体的に説明する。最初に図１に示すように可
動金型１２と固定金型１３とを閉じる。この状態で、ま
ずスキン層として長繊維強化樹脂１をスプルー１１を介
してキャビティ２内に射出する。この時金型７の表面付
近では非常に大きな剪断力が働くため、繊維は流動方向
に配向する。しかしながら、厚み方向の中心部分ではこ
のような剪断力が働かないため繊維材はランダムな配向
となる。次に、上記スキン層を形成するための長繊維強
化樹脂１が溶融状態でキャビティ２内に未充填であるタ
イミングで図２に示すようにコア層として短繊維強化樹
脂３をスキン層を形成するための長繊維強化樹脂１より
も高速で射出する。そして、短繊維強化樹脂３は長繊維
強化樹脂１の未だ溶融している中心部分を選択的に流動
し、長繊維強化樹脂１の中心のランダム配向部分を押し
広げ長繊維材１ａを流動方向に配向しつつキャビティ２
内を進行する。そして、最終得られた製品である繊維強
化サンドイッチ射出成形品４は図３に示すように流動方
向に配向したスキン層４ａとなる長繊維強化樹脂１がコ
ア層４ｂとなる短繊維強化樹脂３を全体的に包み込んだ
積層構造となる。次に、図４乃至図６に基づいて本発明
の他の実施例を具体的に説明する。最初に図４に示すよ
うに可動金型１２と固定金型１３とを閉じる。この状態
で、まずスキン層として長繊維強化樹脂１をスプルー１
１を介してキャビティ４内に射出する。この時金型７の
表面付近では非常に大きな剪断力が働くため、繊維材は
流動方向に配向する。しかしながら、厚み方向の中心部
分ではこのような剪断力が働かないため繊維材はランダ
ムな配向となる。次に、上記スキン層を形成するための
長繊維強化樹脂１が充填完了でかつその中心部が溶融中
である所定のタイミングで図５に示すように可動金型１
２をコア層の射出容量ストーク分Ｈだけ開き、コア層と
して短繊維強化樹脂３を射出する。すると、コア層とな
る短繊維強化樹脂３はスキン層を形成するための長繊維
強化樹脂１の未だ溶融している中心部分を選択的に流動
し、スキン層を形成するための長繊維強化樹脂１の中心
のランダム配向部分を押し広げ長繊維材１ａを流動方向
に配向しつつキャビティ２内に充填される。そして、最
終得られた製品である繊維強化サンドイッチ射出成形品
４は図６に示すように流動方向に配向したスキン層４ａ
となる長繊維強化樹脂１がコア層４ｂとなる短繊維強化
樹脂３を全体的に包み込んだ積層構造となる。Next, one embodiment of the present invention will be specifically described with reference to FIGS. First, as shown in FIG. 1, the movable mold 12 and the fixed mold 13 are closed. In this state, first, the long fiber reinforced resin 1 as a skin layer is injected into the cavity 2 through the sprue 11. At this time, a very large shearing force acts near the surface of the mold 7, so that the fibers are oriented in the flow direction. However, since such shearing force does not work in the central portion in the thickness direction, the fiber material is randomly oriented. Next, at a timing when the long fiber reinforced resin 1 for forming the skin layer is not filled in the cavity 2 in a molten state, as shown in FIG. 2, the short fiber reinforced resin 3 is used as a core layer to form a skin layer. It is injected at a higher speed than the long fiber reinforced resin 1 for. Then, the short fiber reinforced resin 3 selectively flows through the still melted central portion of the long fiber reinforced resin 1 and spreads the randomly oriented portion of the center of the long fiber reinforced resin 1 to extend the long fiber material 1a in the flow direction. Cavity 2 with orientation
Proceed within. The fiber-reinforced sandwich injection-molded product 4 which is the final product has the long-fiber-reinforced resin 1 which becomes the skin layer 4a oriented in the flow direction and the short-fiber-reinforced resin 3 which becomes the core layer 4b as shown in FIG. It has a laminated structure that envelops the entire structure. Next, another embodiment of the present invention will be specifically described with reference to FIGS. First, as shown in FIG. 4, the movable mold 12 and the fixed mold 13 are closed. In this state, first, sponge 1 of long fiber reinforced resin 1 is used as a skin layer.
It is injected into the cavity 4 via 1. At this time, a very large shearing force acts near the surface of the mold 7, so that the fiber material is oriented in the flow direction. However, since such shearing force does not work in the central portion in the thickness direction, the fiber material is randomly oriented. Next, as shown in FIG. 5, the movable mold 1 is moved at a predetermined timing when the filling of the long fiber reinforced resin 1 for forming the skin layer is completed and the central portion is being melted.
2 is opened by the injection volume stalk H of the core layer, and the short fiber reinforced resin 3 is injected as the core layer. Then, the short fiber reinforced resin 3 serving as the core layer selectively flows through the still-melted central portion of the long fiber reinforced resin 1 for forming the skin layer to form the long fiber reinforced resin for forming the skin layer. The long randomly oriented portion at the center of 1 is expanded and the long fiber material 1a is oriented in the flow direction and filled in the cavity 2. The final product, fiber-reinforced sandwich injection-molded product 4, has a skin layer 4a oriented in the flow direction as shown in FIG.
The long-fiber-reinforced resin 1 becomes a laminated structure in which the short-fiber-reinforced resin 3 serving as the core layer 4b is entirely wrapped.
【００１０】[0010]
【発明の効果】本発明にあっては、上述のように、長繊
維材を含む第１の樹脂をキャビティに注入し、第１の樹
脂が未硬化のタイミングにおいて短繊維材を含む第２の
樹脂をキャビティに注入して、第１の樹脂がスキン層と
なり第２の樹脂がコア層となるような成形を行うので、
本発明により得られる繊維強化サンドイッチ射出成形品
は長繊維強化樹脂射出成形品及び短繊維強化樹脂射出成
形品の強度上の欠点が補われ、今までにない成形品の強
度向上がはかれ、この結果、種々の用途、例えば住宅関
連等の構造部材としても使用可能となるものである。According to the present invention, as described above, the first resin containing the long fiber material is injected into the cavity, and the second resin containing the short fiber material is injected at the uncured timing of the first resin. Since the resin is injected into the cavity and the molding is performed so that the first resin becomes the skin layer and the second resin becomes the core layer,
The fiber-reinforced sandwich injection-molded product obtained according to the present invention compensates for the defects in strength of the long-fiber-reinforced resin injection-molded product and the short-fiber-reinforced resin injection-molded product, and the strength of the molded product is improved as never before. As a result, it can be used for various purposes such as a structural member for housing.
【図１】本発明の一実施例の製造順序を示す説明図であ
る。FIG. 1 is an explanatory diagram showing a manufacturing sequence of an embodiment of the present invention.
【図２】同上の製造順序を示す説明図である。FIG. 2 is an explanatory view showing the manufacturing sequence of the above.
【図３】同上の製造順序を示す説明図である。FIG. 3 is an explanatory view showing a manufacturing sequence of the above.
【図４】本発明の他の実施例の製造順序を示す説明図で
ある。FIG. 4 is an explanatory view showing the manufacturing sequence of another embodiment of the present invention.
【図５】同上の製造順序を示す説明図である。FIG. 5 is an explanatory view showing the manufacturing sequence of the above.
【図６】同上の製造順序を示す説明図である。FIG. 6 is an explanatory view showing the manufacturing sequence of the above.
【図７】本発明により得られた繊維強化サンドイッチ射
出成形品の断面図である。FIG. 7 is a sectional view of a fiber-reinforced sandwich injection-molded article obtained according to the present invention.
【図８】従来の長繊維強化樹脂射出成形品の断面図であ
る。FIG. 8 is a cross-sectional view of a conventional long fiber reinforced resin injection molded product.
【図９】従来の短繊維強化樹脂射出成形品の断面図であ
る。FIG. 9 is a cross-sectional view of a conventional short fiber reinforced resin injection molded product.
１ 第１の樹脂 １ａ 長繊維材 ２ キャビティ ３ 第２の樹脂 ３ａ 短繊維材 1 First Resin 1a Long Fiber Material 2 Cavity 3 Second Resin 3a Short Fiber Material
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 9:00 4Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location B29L 9:00 4F
Claims (1)
に注入し、第１の樹脂が未硬化のタイミングにおいて短
繊維材を含む第２の樹脂をキャビティに注入して、第１
の樹脂がスキン層となり第２の樹脂がコア層となるよう
な成形を行うことを特徴とするサンドイッチ射出成形方
法。1. A first resin containing a long fiber material is injected into a cavity, and a second resin containing a short fiber material is injected into a cavity at a timing when the first resin is not cured, and a first resin is injected into the cavity.
2. A sandwich injection molding method, characterized in that molding is carried out such that the resin of (1) serves as a skin layer and the second resin serves as a core layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13500292A JP2972024B2 (en) | 1992-05-27 | 1992-05-27 | Sandwich injection molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13500292A JP2972024B2 (en) | 1992-05-27 | 1992-05-27 | Sandwich injection molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05329886A true JPH05329886A (en) | 1993-12-14 |
| JP2972024B2 JP2972024B2 (en) | 1999-11-08 |
Family
ID=15141640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13500292A Expired - Fee Related JP2972024B2 (en) | 1992-05-27 | 1992-05-27 | Sandwich injection molding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2972024B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009791A1 (en) * | 1996-09-04 | 1998-03-12 | The Dow Chemical Company | Composites of crystalline polymers |
| WO2012124060A1 (en) * | 2011-03-15 | 2012-09-20 | 東海ゴム工業株式会社 | Vibration isolation device |
| WO2012124061A1 (en) * | 2011-03-15 | 2012-09-20 | 東海ゴム工業株式会社 | Vibration isolation device |
| WO2015140239A1 (en) * | 2014-03-20 | 2015-09-24 | Autoliv Development Ab | Method for producing a plastic injection moulded part and plastic injection moulded part |
| CN110065242A (en) * | 2018-01-23 | 2019-07-30 | 波音公司 | The manufacture of composite material component with both continuous and chopped strand components |
| CN111844623A (en) * | 2020-07-24 | 2020-10-30 | 广东伊之密精密机械股份有限公司 | Device for injection molding of long glass fibers |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5717480B2 (en) * | 2011-03-15 | 2015-05-13 | ユニチカ株式会社 | Sandwich molding |
| DE102021214934A1 (en) | 2021-12-22 | 2023-06-22 | Zf Friedrichshafen Ag | Injection molding method for manufacturing a component, component and method for attaching a component |
-
1992
- 1992-05-27 JP JP13500292A patent/JP2972024B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998009791A1 (en) * | 1996-09-04 | 1998-03-12 | The Dow Chemical Company | Composites of crystalline polymers |
| WO2012124060A1 (en) * | 2011-03-15 | 2012-09-20 | 東海ゴム工業株式会社 | Vibration isolation device |
| WO2012124061A1 (en) * | 2011-03-15 | 2012-09-20 | 東海ゴム工業株式会社 | Vibration isolation device |
| US8651469B2 (en) | 2011-03-15 | 2014-02-18 | Tokai Rubber Industries, Ltd. | Vibration damping device |
| WO2015140239A1 (en) * | 2014-03-20 | 2015-09-24 | Autoliv Development Ab | Method for producing a plastic injection moulded part and plastic injection moulded part |
| CN110065242A (en) * | 2018-01-23 | 2019-07-30 | 波音公司 | The manufacture of composite material component with both continuous and chopped strand components |
| CN111844623A (en) * | 2020-07-24 | 2020-10-30 | 广东伊之密精密机械股份有限公司 | Device for injection molding of long glass fibers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2972024B2 (en) | 1999-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR880012338A (en) | Manufacturing method of synthetic resin molding with reinforcement wall structure | |
| KR970025908A (en) | Manufacturing method of synthetic resin molded article | |
| JPH1058573A (en) | Fiber-reinforced thermoplastic resin foam molding and its manufacture | |
| JPH05329886A (en) | Sandwich injection molding method | |
| JPH0938250A (en) | Manufacture of fiber-reinforced resin-made golf club head | |
| JPH03502433A (en) | Fixed injection molding when common mold parts are used with separate auxiliary mold parts | |
| US6261488B1 (en) | Weld line suppression | |
| JP3250065B2 (en) | Resin molding method and resin molded product | |
| EP0865894A4 (en) | Process for producing sandwich-like synthetic resin molded article | |
| EP1265742A1 (en) | Low-density injection-molded body components | |
| JP3047212B2 (en) | Molding method and molding die for laminated molded article | |
| JP3010704B2 (en) | Molding method of fiber reinforced resin molded product | |
| US20030211307A1 (en) | Low-density injection-molded body components | |
| JPH02206518A (en) | Molding of plastic molded product | |
| JP3799710B2 (en) | Molding method of long fiber reinforced molded products | |
| JPH03114811A (en) | Method for molding fiber reinforced resin material | |
| JP2000025057A (en) | Manufacture of fiber-reinforced thermoplastic resin expanded molding | |
| US6468465B1 (en) | Plastic injection molding with reduced dimensional variations using gas pressure and secondary plastic injection | |
| JPH0976291A (en) | Molding method of molded form consisting of different material and molding die therefor | |
| JPH10211635A (en) | Injection molding method | |
| JPH02108511A (en) | Molding process of sandwiched hollow product | |
| JPS58145428A (en) | Injection molding of plastics | |
| JPH09131758A (en) | Manufacture of synthetic resin molding body | |
| JPS58145416A (en) | Manufacture of fiber reinforced resin molded article | |
| JPS6058825A (en) | Manufacture of double-layer molding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990817 |
|
| LAPS | Cancellation because of no payment of annual fees |