JPS61132307A - Manufacture of plastic molded item with metal film - Google Patents

Manufacture of plastic molded item with metal film

Info

Publication number
JPS61132307A
JPS61132307A JP25524984A JP25524984A JPS61132307A JP S61132307 A JPS61132307 A JP S61132307A JP 25524984 A JP25524984 A JP 25524984A JP 25524984 A JP25524984 A JP 25524984A JP S61132307 A JPS61132307 A JP S61132307A
Authority
JP
Japan
Prior art keywords
metal film
metal
molding
sprayed
flame
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
Application number
JP25524984A
Other languages
Japanese (ja)
Inventor
Isamu Araya
荒谷　勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inoac Corp
Original Assignee
Inoue MTP KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inoue MTP KK filed Critical Inoue MTP KK
Priority to JP25524984A priority Critical patent/JPS61132307A/en
Publication of JPS61132307A publication Critical patent/JPS61132307A/en
Pending legal-status Critical Current

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
    • B29C45/14—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
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032—In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

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)
  • Coating By Spraying Or Casting (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

PURPOSE:To omit a subsequent step of providing a metal film after a molding step, by applying a releaser to cavity sections of molds for molding a plastic, and flame-spraying the cavity sections with a metal to form a metal film. CONSTITUTION:A releaser 11 is applied to prescribed sections of cavities of molds 10, 12 using a spray gun or a brush. If required, parts of the molds 10, 12 are covered with masking materials 14, 16 to prevent the releaser and the metal particles from adhering said parts. The flame-sprayed metal film 18 consists of the metal particles densely applied on the releaser 11 by a flame spray gun 20. After the formation of the flame sprayed metal film 18, the cavity is filled with a thermoplastic 24 fed from an injection port 22, and the thermoplastic 24 adheres to the flame sprayed film 18 and is molded integrally therewith. After a prescribed period has passed and when the hardness of the molded item 28 is enough to allow the removal of the molded item 28, the molded item 28 having the flame sprayed film 18 and the thermoplastic 24 integrally is removed from the molds 10, 12.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は、プラスチックス成形用金型のキャビテイ面
に金属膜を形成し、その成形用金型を用いて金属膜を有
するプラスチックス成形品を製造する方法に関する。Detailed Description of the Invention (Field of Industrial Application) The present invention involves forming a metal film on the cavity surface of a mold for molding plastics, and using the mold to produce a plastic molded product having the metal film. Relating to a method of manufacturing.

（従来の技術） 金属膜を有するプラスチックス成形品は、無線周波干渉
（ＲＦＩ）及び電磁波干渉（ＥＭＩ）の防止を目的とし
て主に電子機器の収納ケースとして用いられている。(Prior Art) Plastic molded products having a metal film are mainly used as storage cases for electronic devices for the purpose of preventing radio frequency interference (RFI) and electromagnetic interference (EMI).

従来のこの種のプラスチックス成形品の製造方法は、射
出成形あるいはブロー成形等によって得られたプラスチ
ックス成形品の所定部に、金属を溶着する方法、金属箔
を接着剤等により貼着する方法、金属メッキ若しくは真
空蒸着を施す方法等後加工によるものであった。Conventional methods for manufacturing this type of plastic molded product include welding metal to a predetermined part of a plastic molded product obtained by injection molding or blow molding, or pasting metal foil with adhesive, etc. , by post-processing such as metal plating or vacuum deposition.

ところがこれらの従来の方法は、金属箔の成形に時間を
取られる、メッキあるいは真空蒸着設備が高価である、
加工に時間がかかる、加工時に製品外観を損なう変形、
傷を生じる等の問題を有していた。However, with these conventional methods, forming the metal foil takes time, plating or vacuum deposition equipment is expensive, and
Processing takes time, deformation that impairs product appearance during processing,
It had problems such as causing scratches.

その為に最近では、プラスチックス成形品にカーボンあ
るいは銀、若しくはニッケル等の導電性のある金属粉体
などを混入した導電性塗料を塗布することがなされるよ
うになった。しかし、この導電性塗料の塗布による方法
は、前記の従来技術と同様に後加工によって金属膜く遮
蔽膜）を設けるものである為に製造工程が煩雑で、コス
トが高くなると共に、得られた製品の使用時には導電性
粉体の欠落によって、細く配線されたプリント基盤やス
イッチ、コネクタ等の部品において電気短絡を生じる危
険があり、又、温度変化あるいは不十分な電気的特性か
ら満足のできるＲＦＩ若しくはＥＭＩシール効果を得る
に至っていない。For this reason, in recent years, plastic molded products have been coated with conductive paint containing conductive metal powder such as carbon, silver, or nickel. However, in this method of applying conductive paint, a metal film (shielding film) is provided by post-processing, similar to the above-mentioned conventional technology, so the manufacturing process is complicated, the cost is high, and the obtained When using the product, there is a risk of electrical short circuits in components such as thinly wired printed circuit boards, switches, and connectors due to missing conductive powder, and unsatisfactory RFI due to temperature changes or insufficient electrical characteristics. Or the EMI sealing effect has not been achieved.

（発明が解決しようとする問題点） この発明は前記従来技術における問題点を解決した金属
膜を有するプラスチックス成形品の製造方法を提供する
ことを目的とする。(Problems to be Solved by the Invention) An object of the present invention is to provide a method for manufacturing a plastic molded product having a metal film, which solves the problems in the prior art.

（問題点を解決するための手段） 前記従来技術の問題点を解決するこの発明による金属膜
を有するプラスチックス成形品の製造方法は、プラスチ
ックス成形用金型のキャピテイ部に離型剤を塗布し、そ
の上に金属を溶射して溶射金属膜を形成し、その後キャ
ビティ部においてプラスチックスの成形を行なうもので
ある。(Means for Solving the Problems) A method for manufacturing a plastic molded product having a metal film according to the present invention, which solves the problems of the prior art, includes applying a mold release agent to the cavity part of a mold for plastics molding. Then, metal is thermally sprayed to form a thermally sprayed metal film thereon, and then plastic is molded in the cavity.

金属を溶射するプロセスは、電気アークを使用して目的
の金属材料を溶融し、相手材料に圧縮エアーで吹付けて
表面に溶射金属膜を形成する方法で、いくつかの溶射シ
ステムが存在する。又、溶射する金属は亜鉛、アルミニ
ウム等製品用途により自由に選択される。The process of thermal spraying metals uses an electric arc to melt the target metal material and blows it onto the mating material with compressed air to form a sprayed metal film on the surface. Several thermal spray systems exist. Further, the metal to be thermally sprayed can be freely selected depending on the intended use of the product, such as zinc or aluminum.

キャビティ部に形成する溶射金属膜の厚みは、溶射に用
いるガンの種類及び溶射時間によって製品の用途に応じ
て適宜の値とすることが可能であるが、８０乃至１３０
ミクロンとするのが好適である。The thickness of the sprayed metal film formed in the cavity part can be set to an appropriate value depending on the type of gun used for spraying and the spraying time depending on the application of the product, but it is 80 to 130 mm.
Preferably, it is in microns.

溶射金属膜の形成後行なうプラスチックスの成形は、金
型を用いるプラスチックス成形法、例えば射出成形法、
圧縮成形法、ブロー成形法、ポリウレタンの発泡注入成
形法等の中から、目的とする製品を得るのに最適な成形
法によって行なわれる。この成形時に成形用金型内のプ
ラスチックス材料は、キャビティ部を満たし、溶射金属
膜と密着して一体となって所定形状に成形され、所定時
間経過後金属膜を有するプラスチックス成形品として脱
型される。The plastic molding performed after the formation of the sprayed metal film is performed using a plastic molding method using a mold, such as an injection molding method,
The molding method is selected from compression molding, blow molding, polyurethane foam injection molding, etc., and is most suitable for obtaining the desired product. During this molding, the plastic material in the mold fills the cavity and is molded into a predetermined shape in close contact with the sprayed metal film, and after a predetermined time elapses, it is released as a plastic molded product with a metal film. be molded.

（実施例） 第１図乃至第４図はこの発明一実施例を説明する断面図
である。(Embodiment) FIGS. 1 to 4 are cross-sectional views illustrating an embodiment of the present invention.

第１図は離型剤の塗布工程を示す。離型剤１１は成形用
金型１０．１２のキャビティ所定部にスプレーガンによ
り、あるいはハケにより塗布される。この際必要に応じ
てマスキング材１４．１６によって成形用金型１０．１
２の一部が覆われ、その部位に離形剤及びその後に吹付
けられる金属粒子が付着しないように図られる。離型剤
としてはシリコン系、ワックス系等通常用いられている
ものが使用される。FIG. 1 shows the process of applying a mold release agent. The mold release agent 11 is applied to a predetermined portion of the cavity of the molding die 10.12 using a spray gun or a brush. At this time, if necessary, masking material 14.16 is used to mold mold 10.1.
Part 2 is covered to prevent the mold release agent and the metal particles sprayed later from adhering to that part. As the mold release agent, commonly used ones such as silicone type and wax type are used.

第２図は金属の溶射工程を示す。溶射金属膜１８は、溶
射ガン２０によって離型剤１１上に密に噴霧された金属
粒子よりなる。Figure 2 shows the metal spraying process. The sprayed metal film 18 is made of metal particles that are densely sprayed onto the mold release agent 11 by the spray gun 20 .

第３図はプラスチックスの成形工程を示す。溶射金属膜
１８の形成後成形用金型１０．１２は閉じられ、注入口
２２より熱可塑性プラスチックス２４がキャビティ内に
充填され、キャビティ内において溶射金属膜１８と密着
し、一体となって所定形状に成形される。２６は射出成
形機のノズルである。勿論、熱可塑性プラスチックスの
成形は射出成形に限られるものではなく、製品形状等に
よってブロー成形あるいは、圧縮成形等の成形用金型を
用いる他の成形法が適宜使用され、成形用金型もそれに
応じたものとされる。更に、熱硬化性プラスチックスで
あるポリウレタンフォームを発泡注入成形法によって成
形してもよい。Figure 3 shows the plastic molding process. After forming the sprayed metal film 18, the molding die 10.12 is closed, and the thermoplastic plastic 24 is filled into the cavity through the injection port 22, so that it comes into close contact with the sprayed metal film 18 in the cavity and is integrally formed into a predetermined shape. molded into a shape. 26 is a nozzle of an injection molding machine. Of course, molding of thermoplastics is not limited to injection molding; other molding methods using molds such as blow molding or compression molding may be used as appropriate depending on the product shape, etc. It will be considered accordingly. Furthermore, polyurethane foam, which is a thermosetting plastic, may be molded by foam injection molding.

第４図は成形品の脱型工程を示す。キャビティ内に充填
された熱可塑性プラスチックス２４が所定時間経過後脱
型可能な硬度となった時点で、溶射金属膜１８と熱可塑
性プラスチックス２４とが一体となった成形品２８は成
形用金型１０．１２より取り出される。FIG. 4 shows the process of demolding the molded product. When the thermoplastic plastic 24 filled in the cavity reaches a hardness that can be removed from the mold after a predetermined period of time, the molded product 28 in which the thermal sprayed metal film 18 and the thermoplastic plastic 24 are integrated is molded with molding metal. Removed from mold 10.12.

（効果） この発明は、前記のようにプラスチックス成形用金型の
キャビティ部に離型剤を塗布し、その上に金属を溶射し
て溶射金属膜を形成し、その後キャビティ部においてプ
ラスチックスの成形を行ない、プラスチックスを所定形
状に形成すると同時に溶射金属膜との一体化を図るもの
である。(Effects) As described above, this invention applies a mold release agent to the cavity part of a mold for plastics molding, sprays metal onto it to form a sprayed metal film, and then coats the plastics in the cavity part. Molding is performed to form the plastic into a predetermined shape and at the same time to integrate it with the sprayed metal film.

従って、プラスチックス成形品に金属膜を設けるに際し
て後工程が不要となる為に製造工程が簡略となり、又成
形用金型も従来のものでよく、金属の溶射に際しても特
殊な熟練、注意が不要であリ、溶射される金属について
も製品用途に応じて選択できる効果を有する。また、キ
ャビティ部に溶射された金属膜の開放面（プラスチック
スとの接触面）は微細な孔を有し、凹凸形状となる為に
プラスチックスとの密着性が高く、強固に結合し、その
反面、金属膜の他面はキャビティ表面によって規制され
る為に均一なものとなり、更に、金属の溶射に際しての
マスキングが、成形用金型内におけるマスキング材のセ
ットによりなされる為に、従来におけるプラスチックス
成形品に直接金属コーティングする際のマスイングに比
べて、狂いが少なく正確になる効果も有する。Therefore, when applying a metal film to a plastic molded product, there is no need for post-processing, which simplifies the manufacturing process.Furthermore, conventional molding molds can be used, and special skill and care are not required when spraying metal. In addition, the metal to be thermally sprayed can also be selected depending on the product application. In addition, the open surface (contact surface with plastics) of the metal film sprayed on the cavity part has fine holes and has an uneven shape, so it has high adhesion with plastics and is strongly bonded. On the other hand, the other side of the metal film is regulated by the cavity surface, making it uniform. Furthermore, since masking during metal spraying is done by setting masking material in the mold, conventional plastic It also has the effect of being more accurate with fewer deviations than mass swings, which apply metal coating directly to molded products.

この発明の実施によって溶射金属膜を５０〜１００ミク
ロンの亜鉛とし、プラスチックス材料をアクリロニトリ
ル−ブタジェン−スチレン（ＡＢＳ）樹脂とする電子機
器用収納ケースを製造したところ、５０〜８０デシベル
の遮蔽を実現できた。By implementing this invention, we manufactured a storage case for electronic equipment using zinc with a thickness of 50 to 100 microns as the sprayed metal film and acrylonitrile-butadiene-styrene (ABS) resin as the plastic material, and achieved shielding of 50 to 80 decibels. did it.

この発明の実施によって得られる金属膜を有するプラス
チックス成形品は、電子機器用収納ケースの他に、ガス
バリヤ−性の高い瓶、配線回路を一体に有する成形品、
装飾性を有する容器等、広範囲の分野において使用され
る。Plastic molded products having a metal film obtained by carrying out the present invention include storage cases for electronic devices, bottles with high gas barrier properties, molded products having integrated wiring circuits,
It is used in a wide range of fields, including decorative containers.

【図面の簡単な説明】[Brief explanation of drawings]

図面はこの発明一実施例を説明する断面図であり、第１
図は離型材の塗布工程、第２図は金属の溶射工程、第３
図はプラスチックスの成形工程、第４図は成形品の脱型
工程を示す。 １０．１２　　成形用金型、１１　　離型剤、１４．１
６　　マスキング材、１８　　溶射金属膜、２４　　熱
可塑性プラスチックスThe drawing is a sectional view for explaining one embodiment of this invention, and the first
The figure shows the mold release agent coating process, the second figure shows the metal spraying process, and the third figure shows the process of applying the mold release agent.
The figure shows the plastic molding process, and Figure 4 shows the demolding process of the molded product. 10.12 Molding mold, 11 Mold release agent, 14.1
6 Masking material, 18 Sprayed metal film, 24 Thermoplastic plastics

Claims (1)

【特許請求の範囲】[Claims] プラスチックス成形用金型のキャビティ部に離型剤を塗
布し、その上に金属を溶射して溶射金属膜を形成し、そ
の後キャビティ部においてプラスチックスの成形を行な
うことを特徴とする、金属膜を有するプラスチックス成
形品の製造方法。A metal film characterized in that a mold release agent is applied to the cavity of a mold for plastics molding, a metal is sprayed onto the mold to form a sprayed metal film, and then plastics are molded in the cavity. A method for manufacturing a plastic molded product having the following.
JP25524984A 1984-12-03 1984-12-03 Manufacture of plastic molded item with metal film Pending JPS61132307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25524984A JPS61132307A (en) 1984-12-03 1984-12-03 Manufacture of plastic molded item with metal film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25524984A JPS61132307A (en) 1984-12-03 1984-12-03 Manufacture of plastic molded item with metal film

Publications (1)

Publication Number Publication Date
JPS61132307A true JPS61132307A (en) 1986-06-19

Family

ID=17276112

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25524984A Pending JPS61132307A (en) 1984-12-03 1984-12-03 Manufacture of plastic molded item with metal film

Country Status (1)

Country Link
JP (1) JPS61132307A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007507617A (en) * 2003-10-02 2007-03-29 プラックセアー エス．ティ．テクノロジー、 インコーポレイテッド Method for producing injected composite
JP2009174014A (en) * 2008-01-25 2009-08-06 Tzu-Wen Sung Method of forming surface layer on substrate

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60122114A (en) * 1983-12-05 1985-06-29 Nippon Shokubai Kagaku Kogyo Co Ltd Releasing agent for metal spraying

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60122114A (en) * 1983-12-05 1985-06-29 Nippon Shokubai Kagaku Kogyo Co Ltd Releasing agent for metal spraying

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007507617A (en) * 2003-10-02 2007-03-29 プラックセアー エス．ティ．テクノロジー、 インコーポレイテッド Method for producing injected composite
JP2009174014A (en) * 2008-01-25 2009-08-06 Tzu-Wen Sung Method of forming surface layer on substrate

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