JPH01178417A - Manufacture of laminated substance - Google Patents
Manufacture of laminated substanceInfo
- Publication number
- JPH01178417A JPH01178417A JP159188A JP159188A JPH01178417A JP H01178417 A JPH01178417 A JP H01178417A JP 159188 A JP159188 A JP 159188A JP 159188 A JP159188 A JP 159188A JP H01178417 A JPH01178417 A JP H01178417A
- Authority
- JP
- Japan
- Prior art keywords
- skin material
- molten resin
- hole
- skin
- supply port
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000126 substance Substances 0.000 title description 2
- 239000000463 material Substances 0.000 claims abstract description 70
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000011347 resin Substances 0.000 claims abstract description 48
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000007493 shaping process Methods 0.000 claims abstract 2
- 238000000465 moulding Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- -1 polypropylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は積層体の製造方法に関する。詳しくは熱可塑性
樹脂層とその両面の表皮材層とからなる積層体を、より
安価な装置を用いてハイサイクルで得る合理的な製造方
法である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a laminate. Specifically, it is a rational manufacturing method for obtaining a laminate consisting of a thermoplastic resin layer and skin material layers on both sides in a high cycle using cheaper equipment.
熱可塑性樹脂層とその両画の表皮材層とからなる積層体
は、表皮材により強化、装飾、反射、制振、シール性等
の機能を付与され、例えば、自動車ニアコンディジ替ニ
ング用機器でのヒーターケース又はケースブロワのダン
パー等に使用されている。A laminate consisting of a thermoplastic resin layer and skin material layers on both sides is given functions such as reinforcement, decoration, reflection, vibration damping, and sealing properties by the skin material, and is used, for example, in automobile near conditioning equipment. Used in heater cases or case blower dampers, etc.
このような積層体を得る方法として、予め射出成形等に
より成形した熱可塑性樹脂層の両面に表皮材を接着剤等
で貼り合わせる方法、または、特開昭６１−２４９８９
号公報で示されているように、プレス成形において上下
金型間とその系外との間で移動可能な供給口より表皮材
間に溶融樹脂を供給しプレス成形する方法等が公知であ
る。As a method of obtaining such a laminate, there is a method of bonding a skin material to both sides of a thermoplastic resin layer formed in advance by injection molding or the like using an adhesive or the like, or a method described in Japanese Patent Application Laid-Open No. 61-24989.
As shown in the above publication, a method is known in which press molding is performed by supplying molten resin between skin materials through a supply port that is movable between upper and lower molds and outside the system.
しかし、前者の方法では貼り合わせのため多大な工数と
時間を要し、また、後者の方法では系外の供給口をプレ
ス上下金型の移動に支障のないよう退避させる必要があ
るためタイムサイクルが大きくなったり、得られた８Ｉ
層体の表面に樹脂の供給痕が浮き出る等の問題があり、
いずれも満足できるものではない。However, the former method requires a large amount of man-hours and time for bonding, and the latter method requires the supply port outside the system to be evacuated so as not to interfere with the movement of the upper and lower press molds, resulting in a time cycle. becomes larger or the obtained 8I
There are problems such as resin supply traces appearing on the surface of the layer.
Neither is satisfactory.
本発明の目的は熱可塑性樹脂層とその両面の表皮材層と
からなる積層体を低コストかつハイサイクルで製造する
ことにある。An object of the present invention is to produce a laminate consisting of a thermoplastic resin layer and skin material layers on both sides at low cost and in a high cycle.
本発明者等は、熱可塑性樹脂層と、その両面の表皮材層
とからなる積層体の製造法につき鋭意検討を続けてきた
。その結果、金型内に設けられた供給口に当接する部分
に穴を有する表皮材を使用し、抜穴を通して二枚の表皮
材の間に溶融樹脂を供給することにより、積層体をハイ
サイクルで製造できることを見出し、本発明を完成する
に至った。すなわち、本発明は、供給口（６）と同等も
しくはそれより大きい穴（９）を有する表皮材（８）と
表皮材（７）とを重ねて、穴（９）の周辺が供給口（６
）の周辺に当接するように載置した後、溶融樹脂αＱを
穴（９）を通して二枚の表皮材（７及び８）の間に供給
しながら又は供給した直後にプレス成形して賦形するこ
とを特徴とする熱可塑性樹脂層とその両面の表皮材層と
からなる積層体の製造方法である。The present inventors have continued to conduct intensive studies on a method for manufacturing a laminate comprising a thermoplastic resin layer and skin material layers on both sides of the thermoplastic resin layer. As a result, by using a skin material with a hole in the part that contacts the supply port provided in the mold and supplying molten resin between the two skin materials through the hole, the laminate can be cycled at high speed. The present inventors have discovered that it can be manufactured using the following methods, and have completed the present invention. That is, in the present invention, a skin material (8) having a hole (9) that is equal to or larger than the supply port (6) and a skin material (7) are overlapped, and the periphery of the hole (9) is the supply port (6).
), and then press-molded and shaped while or immediately after supplying the molten resin αQ between the two skin materials (7 and 8) through the hole (9). This is a method for producing a laminate comprising a thermoplastic resin layer and skin material layers on both sides of the thermoplastic resin layer.
以下に図面に基づいて本発明の方法の一例を説明する。An example of the method of the present invention will be explained below based on the drawings.
第１図〜第４図は、本発明の実施方法を表わす装置の縦
の断面図である。上プラテン（１）には上金型（２）が
取付けてあり、油圧又はモーターで上下に移動する。下
プラテン（８）には下金型（４）が取付けてあり、下金
型（４）には溶融樹脂（９）の通る樹脂通路（６）及び
供給口（６）が設けられている。この樹脂通路（５）は
、図示していないが溶融樹脂（１０）を供給する可塑化
装置の先端に接続されている。又、供給口（６）には、
溶融樹脂（１０）を供給する時は開き、供給しない時は
閉じる弁を設けることもできる。1-4 are longitudinal cross-sectional views of an apparatus illustrating the method of carrying out the invention. An upper mold (2) is attached to the upper platen (1) and is moved up and down by hydraulic pressure or a motor. A lower mold (4) is attached to the lower platen (8), and the lower mold (4) is provided with a resin passage (6) through which molten resin (9) passes and a supply port (6). Although not shown, this resin passage (5) is connected to the tip of a plasticizing device that supplies molten resin (10). In addition, the supply port (6) has
A valve may be provided that opens when the molten resin (10) is supplied and closes when not supplied.
上記のような装置を用いて次のように本発明の方法を実
施する。The method of the present invention is carried out as follows using the apparatus as described above.
第１図に示した如く二枚の表皮材（７）および（８）を
重ねて下金型（４）上に載置する。上記表皮材のうち供
給口側の表皮材（８）の供給口（６）に相対する部分に
は、供給口（６）より大きい穴（９）が設けられている
。As shown in FIG. 1, two skin materials (7) and (8) are stacked and placed on the lower mold (4). A hole (9) larger than the supply port (6) is provided in a portion of the skin material (8) on the supply port side facing the supply port (6) of the skin material.
次に第２図に示した如く、上プラテン（１）を降下させ
上下金型をまだ閉鎖していない適切な位置まで接近させ
て、供給口（６）から可塑化熔融した熱可塑性樹脂であ
る溶融樹脂（１のの供給を開始する。溶融樹脂（１０）
の供給開始にともない反供給口側の表皮材（７）は供給
口側の表皮材（８）の穴（９）を通過した溶融樹脂（１
ｏ）の樹脂圧により上金型（２）に接するまで持ち上げ
られると同時に供給口側の表皮材（８）は下金型（４）
におしつけられ、溶融樹脂（１０）は上下表皮材の間に
供給される。Next, as shown in Fig. 2, the upper platen (1) is lowered to approach the upper and lower molds to appropriate positions that have not yet been closed, and the plasticized and molten thermoplastic resin is poured from the supply port (6). Start supplying molten resin (1).Molten resin (10)
With the start of supply of the molten resin (1), the skin material (7) on the side opposite to the supply port is filled with the molten resin (1) that has passed through the hole (9) of the skin material (8) on the supply port side.
At the same time, the skin material (8) on the supply port side is lifted up until it touches the upper mold (2) by the resin pressure of step o) and the lower mold (4).
The molten resin (10) is supplied between the upper and lower skin materials.
さらに溶融樹脂（１０）の供給を行いながらまたは供給
直後に上プラテン（１）を降下させ上下金型で溶融樹脂
をプレス、賦形して熱可塑性樹脂層（１１）とその両面
の表皮材層（７）および（８）とからなる積層体を得る
（第８図）。Further, while or immediately after supplying the molten resin (10), the upper platen (1) is lowered and the molten resin is pressed and shaped with upper and lower molds to form a thermoplastic resin layer (11) and skin material layers on both sides thereof. A laminate consisting of (7) and (8) is obtained (FIG. 8).
本発明において供給口側の表皮材に設ける穴の大きさは
熱可塑性樹脂の種類、溶融樹脂の供給条件、供給時の上
下金型のクリアランス、表皮材の猟類、表皮材の保持方
法等により決められる。抜穴が供給口よりも小さいと該
供給口より溶融樹脂を供給した場合、該溶融樹脂が供給
口側金型と供給口側表皮材との間にも供給され供給口側
の表皮材の穴のまわりに樹脂がはみ出した製品しか得ら
れない。In the present invention, the size of the hole provided in the skin material on the supply port side depends on the type of thermoplastic resin, the supply conditions of the molten resin, the clearance between the upper and lower molds at the time of supply, the species of the skin material, the method of holding the skin material, etc. It can be decided. If the extraction hole is smaller than the supply port, when molten resin is supplied from the supply port, the molten resin is also supplied between the mold on the supply port side and the skin material on the supply port side, and the hole in the skin material on the supply port side is Only products with resin protruding around the edges can be obtained.
本発明において、良好な表皮材の状態を得るため表皮材
の溶融樹脂に接する面に裏打ち処理を施こしておいても
よい。さらに該表皮材は第１図の如く下金型に直装置い
てもよいし、あるいは適切な保持手段を用いて保持して
おいてもよい。又、第４図に示す如く、供給口を上金型
内に設は供給口側の表皮材を真空吸引等適切な保持手段
を用いて上金型に密接させてもよい。In the present invention, in order to obtain a good condition of the skin material, a lining treatment may be performed on the surface of the skin material that comes into contact with the molten resin. Further, the skin material may be placed directly on the lower mold as shown in FIG. 1, or may be held using an appropriate holding means. Alternatively, as shown in FIG. 4, the supply port may be provided in the upper mold, and the skin material on the supply port side may be brought into close contact with the upper mold using an appropriate holding means such as vacuum suction.
本発明に用いる表皮材としては金属、プラスチック、織
布、不織布、ガラス繊維・炭素繊維等のマプト・クロス
、発泡材等であり同一のものを二枚用いてもよいし、種
類、厚み等の異なるものを用いてもよい。また溶融樹脂
の供給に先立って表皮材の予備加熱を行なってもよい。The skin materials used in the present invention include metals, plastics, woven fabrics, non-woven fabrics, Maputo cloth such as glass fibers and carbon fibers, foam materials, etc., and two sheets of the same material may be used, or two sheets of the same material may be used. You may use a different one. Further, the skin material may be preheated prior to supplying the molten resin.
又、表皮材としては、シート状のものあるいは、あらか
じめ所望の形状に予備賦形されたものを使用することが
できる。表皮材の厚みは、特に限定する必要はないが、
０．０５．〜２０−ｇのものが好適に使用できる。Further, as the skin material, a sheet-like material or a material pre-shaped into a desired shape can be used. The thickness of the skin material does not need to be particularly limited, but
0.05. ~20-g can be suitably used.
本発明において使用される熱可塑性樹脂としては、射出
成形や押出し成形において通常使用されるものを用いる
ことができ、例えば、ポリプロピレン、ポリエチレン、
ポリスチレン、アクリロニトリル−スチレン−ブタジェ
ンブロック共重合体およびナイロン等をあげることがで
きる。熱可塑性樹脂層の厚みは特に限定する必要はない
が、Ｏ，ａ、〜８０ｍの範囲とするのが好ましく、０．
５．〜１０ｍとするのが特に好ましい。As the thermoplastic resin used in the present invention, those commonly used in injection molding and extrusion molding can be used, such as polypropylene, polyethylene,
Examples include polystyrene, acrylonitrile-styrene-butadiene block copolymer, and nylon. The thickness of the thermoplastic resin layer does not need to be particularly limited, but it is preferably in the range of 0.0 m to 80 m.
5. It is particularly preferable to set it to 10 m.
本発明では、供給口に当接する部分に穴を有する表皮材
を使用し、抜穴を通して二枚の表皮材の間に溶融樹脂を
供給することにより、熱可塑性樹脂層とその両面の表皮
材層とからなる外観良好な積層体を、安価な装置を用い
、ハイサイクルで製造することができる。In the present invention, a skin material having a hole in the part that contacts the supply port is used, and by supplying molten resin between the two skin materials through the hole, the thermoplastic resin layer and the skin material layers on both sides of the skin material layer are formed. A laminate with a good appearance can be manufactured in a high cycle using inexpensive equipment.
実施例１
直径が２０．の穴を有する２５ｅｍＸ８０側の長方形状
の表皮材と、穴は有しないが同じ大きさの長方形状の表
皮材を二枚重ねて、抜穴の周辺が下金型内に設けた直径
６ｕの供給口の周辺に当接するように載置する。上下金
型間のクリアランスを１０ｕとし、供給口より抜穴を通
して溶融樹脂を樹脂温度２８０℃で８００５’／秒の速
度で二枚の表皮材の間に供給し、供給直後に上金型を降
下賦形し熱可塑性樹脂層の厚みが２藺である外観良好な
積層体を得た。なお成形サイクルは８５秒／回であった
。Example 1 Diameter is 20. A rectangular skin material on the 25em x 80 side with a hole of Place it so that it is in contact with the surrounding area. The clearance between the upper and lower molds is 10u, and the molten resin is supplied from the supply port through the hole at a resin temperature of 280°C between the two skin materials at a rate of 8005'/sec, and the upper mold is lowered immediately after supplying. A laminate with a good appearance and a thermoplastic resin layer having a thickness of 2 mm was obtained. The molding cycle was 85 seconds/time.
表皮材：マイクログラスクロスＹＥ）１４８０ Ｂ（標
準厚み０．４−ａ 、日本硝子繊維■製）
溶融樹脂：住人ノーブレン■ＡＺ５６４（メルトフロー
シー）８０Ｆ／１０分の
ポリプロピレン、住人化学工業■
製）
比較例
２６αＸ８０ｃｍの長方形状の表皮材を二枚重ねて下金
型上へ載置する。プレス成形装置の系外に設けた供給口
を上下金型間へ移動し、溶融樹脂を樹脂温度２４０℃で
４００ｆ／秒の速度で二枚の表皮材層の間に供給する。Skin material: Microglass cloth YE) 1480 B (standard thickness 0.4-a, manufactured by Nippon Glass Fiber ■) Molten resin: Jumin Noblen ■ AZ564 (Melt Flow Sea) 80F/10 minute polypropylene, manufactured by Sumiya Kagaku Kogyo ■) Comparative Example 26 Two sheets of rectangular skin material measuring α×80 cm are stacked and placed on the lower mold. A supply port provided outside the system of the press molding device is moved between the upper and lower molds, and the molten resin is supplied between the two skin material layers at a resin temperature of 240° C. and a speed of 400 f/sec.
供給直後に、該供給口を上下金型の移動に支障のない位
置へ退避させた後、プレス成形し、熱可塑性樹脂層の厚
みが２Ｍである積層体を得たが、成形サイクルは５５秒
／回であった。Immediately after supplying, the supply port was evacuated to a position that does not interfere with the movement of the upper and lower molds, and press molding was performed to obtain a laminate in which the thickness of the thermoplastic resin layer was 2M, but the molding cycle was 55 seconds. / times.
又、得られた積層体の表皮材表面に樹脂の供給痕が浮き
出ていた。なお、表皮材および溶融樹脂は実施例１と同
じものを使用した。Furthermore, traces of resin supply were visible on the surface of the skin material of the obtained laminate. Note that the same skin material and molten resin as in Example 1 were used.
実施例２
直径が１０Ｍの穴を有し、５０ ｃｍ Ｘ ５０ ｃｍ
の正方形状の表皮材と穴は有しない同じ大きさの正方形
状の表皮材を二枚重ねて、抜穴の周辺が下金型に設けた
直径４．の供給口の周辺に当接するように載置する。上
下金型間のクリアランスを７０ｍとし、供給口よ−り抜
穴を通して溶融樹脂を樹脂温度２１０’Ｃで２００ｔ／
秒の速度で二枚の表皮材の間に供給し、供給直後に上金
型を降下賦形すると同時に上下金型のすり合わせ部によ
り積層体を切断し熱可塑性樹脂層の厚みが８Ｗ″Ｃ直径
が８０ｃｍの外観が良好な円板状の積層体を得た。なお
成形サイクルは４０秒／回であった。Example 2 A hole with a diameter of 10M, 50 cm x 50 cm
A square skin material of the same size and a square skin material of the same size without a hole are stacked one on top of the other, and the periphery of the punched hole has a diameter of 4. Place it so that it is in contact with the area around the supply port. The clearance between the upper and lower molds was 70m, and the molten resin was passed through the hole from the supply port at a resin temperature of 210'C and 200t/200t/m.
The thermoplastic resin layer is supplied between two skin materials at a speed of seconds, and immediately after the supply, the upper mold is lowered and shaped, and at the same time the laminated body is cut by the mating part of the upper and lower molds, so that the thickness of the thermoplastic resin layer is 8W''C diameter. A disc-shaped laminate with a diameter of 80 cm and a good appearance was obtained.The molding cycle was 40 seconds/time.
表皮材：エステル系発泡ポリウレタンシー）３Ｍ黒（標
準厚み１０ｕ１井上
エムチービー■製）
溶融樹脂：住人ノーブレン■ＡＹ５６４（メルトフロー
レート１５Ｆ／１０分
のポリプロピレン、住人化学工業
昧製）Skin material: Ester-based polyurethane foam) 3M black (standard thickness 10u1 manufactured by Inoue MCV) Melt resin: Juju Noblen AY564 (melt flow rate 15F/10 min polypropylene, made by Juju Chemical Industry Co., Ltd.)
第１図〜第４図は本発明の詳細な説明する装置断面図で
ある。
に上プラテン、２：上金型
８：下プラテン、４：下金型
５：樹脂通路、６：樹脂供給口
７二反樹脂供給口側表皮材。
８：樹脂供給口側表皮材。
９：樹脂供給口側表皮材の穴、１ｏ：溶融樹脂１１：熱
可塑性樹脂
第１図 第２図FIGS. 1 to 4 are sectional views of a device for explaining the present invention in detail. upper platen, 2: upper mold 8: lower platen, 4: lower mold 5: resin passage, 6: resin supply port 7, skin material on the double resin supply port side. 8: Resin supply port side skin material. 9: Hole in the skin material on the resin supply port side, 1o: Molten resin 11: Thermoplastic resin Figure 1 Figure 2
Claims (1)
有する表皮材（８）と表皮材（７）とを重ねて、穴（９
）の周辺が供給口（６）の周辺に当接するように載置し
た後、溶融樹脂（１０）を穴（９）を通して二枚の表皮
材（７及び８）の間に供給しながら又は供給した直後に
プレス成形して賦形することを特徴とする熱可塑性樹脂
層とその両面の表皮材層とからなる積層体の製造方法。Layer the skin material (8) having a hole (9) that is equal to or larger than the supply port (6) and the skin material (7), and
) is placed so that its periphery is in contact with the periphery of the supply port (6), and then the molten resin (10) is fed or fed between the two skin materials (7 and 8) through the hole (9). A method for producing a laminate comprising a thermoplastic resin layer and skin material layers on both sides of the thermoplastic resin layer, the method comprising press-molding and shaping the laminate immediately after forming the thermoplastic resin layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159188A JPH01178417A (en) | 1988-01-06 | 1988-01-06 | Manufacture of laminated substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159188A JPH01178417A (en) | 1988-01-06 | 1988-01-06 | Manufacture of laminated substance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01178417A true JPH01178417A (en) | 1989-07-14 |
| JPH0583056B2 JPH0583056B2 (en) | 1993-11-24 |
Family
ID=11505752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP159188A Granted JPH01178417A (en) | 1988-01-06 | 1988-01-06 | Manufacture of laminated substance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01178417A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073997A (en) * | 1999-08-16 | 2001-03-21 | General Electric Co <Ge> | Injection-molded hybrid blade part |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49119747A (en) * | 1973-03-22 | 1974-11-15 | ||
| JPS5411166A (en) * | 1977-06-28 | 1979-01-27 | Aron Kasei Kk | Manufacture of moldings |
| JPS62275724A (en) * | 1986-05-23 | 1987-11-30 | Hitachi Chem Co Ltd | Manufacture of electromagnetic wave shielding molded item |
-
1988
- 1988-01-06 JP JP159188A patent/JPH01178417A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49119747A (en) * | 1973-03-22 | 1974-11-15 | ||
| JPS5411166A (en) * | 1977-06-28 | 1979-01-27 | Aron Kasei Kk | Manufacture of moldings |
| JPS62275724A (en) * | 1986-05-23 | 1987-11-30 | Hitachi Chem Co Ltd | Manufacture of electromagnetic wave shielding molded item |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001073997A (en) * | 1999-08-16 | 2001-03-21 | General Electric Co <Ge> | Injection-molded hybrid blade part |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0583056B2 (en) | 1993-11-24 |
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