JPS58122813A - Manufacture of plastic case - Google Patents

Manufacture of plastic case

Info

Publication number
JPS58122813A
JPS58122813A JP465782A JP465782A JPS58122813A JP S58122813 A JPS58122813 A JP S58122813A JP 465782 A JP465782 A JP 465782A JP 465782 A JP465782 A JP 465782A JP S58122813 A JPS58122813 A JP S58122813A
Authority
JP
Japan
Prior art keywords
synthetic rubber
plastic case
pattern
case
poured
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
JP465782A
Other languages
Japanese (ja)
Inventor
Mitsuo Higashiya
東谷　光男
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha 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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP465782A priority Critical patent/JPS58122813A/en
Publication of JPS58122813A publication Critical patent/JPS58122813A/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • B29C33/405—Elastomers, e.g. rubber
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding

Abstract

PURPOSE:To obtain rationally a plastic case which is stable on qualities, by incorporating simultaneously an already formed part when manufacturing the plastic case by a cast molding. CONSTITUTION:Liquid synthetic rubber which has an elasticity and a duplicating property and has been deaerated under a reduced pressure is poured into a vessel when manufacturing a plastic case. A pattern is placed in the center of the vessel and the pattern is taken out after heating at 100 deg.C for one hour, then the film of a thickness more than 10mum is formed on the surface of synthetic rubber 3. The pattern is again set and said liquid synthetic rubber is poured. After synthetic rubber 3' is cured by heating at 100 deg.C for one hour, the pattern is taken out. A cover part 6 is positioned at the predetermined place of synthetic rubber 3. Synthetic resin for casting 5 is deaerated under a reduced pressure, then is poured into said synthetic rubber molds 3, 3' and the molds are fixed by a glass plate 1. Then, liquid synthetic resin 5 is heat cured. The synthetic rubber molds 3, 3' are released and the case 5 is obtained.

Description

【発明の詳細な説明】 本発明け、プラスチックケースの製造方法に関し、詳し
くはすでに成形されている部品を、注型成型する際、同
時に組み込むことで、合理的にかつ又、品質的に安定し
たプラスチックケースの製造方法に関する。[Detailed Description of the Invention] The present invention relates to a method for manufacturing a plastic case, in detail, by incorporating already molded parts at the same time as casting, it is possible to achieve rational and stable quality. Relating to a method of manufacturing a plastic case.

従来、プラスチックケースな製造するに肖り、射出成型
方法が主である。そこＫは溶融された熱可塑性樹脂をゲ
ートから射出圧入され、急冷することで成形するか、樹
ＭＫ配向性や内部応力などが発生し、製品の品質が低下
するという欠点かある。又、防水性を付与させるため、
時計ケースにパツキンを介して、カバーガラス（無機ガ
ラスヌは透明な合成樹脂）を圧入する際、射出成形され
たグラスチックケースには必然的にワレ、ユガミが発生
する。長時間使用して品質保証できる抜本的対策は今の
ところ見当らない。内部応力を緩和するのには、射出成
形された製品を２次転移点以上に加熱し除去する７ニリ
ング方法が参るが、２次転伝点以上で低い範囲のｉ１度
では、除去基が少なく、又昇温して融点近くでは、寸法
精度がなくなって針で、本来の意味がなくなってくる。Traditionally, injection molding is the main method used to manufacture plastic cases. The problem with K is that molten thermoplastic resin is injected and press-fitted through a gate and then rapidly cooled to form the mold, which results in the occurrence of tree MK orientation and internal stress, which reduces the quality of the product. In addition, in order to impart waterproofness,
When a cover glass (inorganic glass is a transparent synthetic resin) is press-fitted into a watch case through a gasket, cracks and distortions inevitably occur in the injection-molded glass case. At present, there are no drastic measures that can guarantee quality over long periods of use. To relieve the internal stress, the 7-nilling method involves heating the injection molded product above the secondary transition point and removing it, but at low i1 degrees above the secondary transition point, there are few removal groups. Also, when the temperature rises to near the melting point, the dimensional accuracy is lost and the needle loses its original meaning.

そして内部応力が完全に除去することは不可能である。And it is impossible to completely eliminate internal stress.

又射出成形法は、色変えの工数や金型の取り換え工数が
大きなウェイトを占めて、生産管理上難点となっている
。一方、注型用ケース製造方法は工数が少なく、内部応
力は低いｇ収縮率が大きく寸法精度の点で射出成形法に
比較し大ぎ〈実用になっていない。かつ又、液体から固
体になるという高分子化することで強度低下がまぬがれ
ない状−Ｋか６゜したがって、注型方式形式で強度があ
り、内部応力の発生の少ないカバーガラスと一体化した
ケースが強く要望される。上記の従来の欠点を解消する
ために鋭意研究を続けた結果、予めカバー材として形成
されたアクリル系、ヌは無機ガラスを型取られたケース
用合成ゴム型に、位ツ決めしてお舞、注型用合成樹脂に
シラン処理したガラス繊維を１０〜５０憾で混入した液
状合成樹脂を流し込み、加熱重合することで、製品化す
るという製造方法で解決した。本発明で合成ゴムとけ、
エポキシ樹脂、シリコン樹脂、ウレタン樹脂など弾力件
のある転写性の良い成形ゴムをいう。In addition, the injection molding method requires a large amount of man-hours for changing colors and replacing molds, making it difficult to manage production. On the other hand, the casting case manufacturing method requires fewer man-hours, has a low internal stress, has a low g-shrinkage rate, and has a large dimensional accuracy compared to the injection molding method, so it is not in practical use. Moreover, due to polymerization, which changes from a liquid to a solid, strength cannot be avoided. is strongly requested. As a result of intensive research to eliminate the above-mentioned conventional drawbacks, we decided to place acrylic glass, which was previously formed as a cover material, and inorganic glass into a synthetic rubber mold for the case. The solution was to create a product by pouring a liquid synthetic resin mixed with 10 to 50 silane-treated glass fibers into a casting synthetic resin and polymerizing it by heating. With the present invention, synthetic rubber melts,
Molded rubber with elasticity and good transferability, such as epoxy resin, silicone resin, and urethane resin.

ヌガラス繊維は、繊維長１〜３０００μで、径１〜６０
μである。シラン処理剤は、アミノ系、エポキシ系、ア
クリル系なども含まれる。注型用液状樹脂は、不飽和ポ
リエステル、エポキシ樹脂、スピラン樹脂などをさす。Nuglass fiber has a fiber length of 1 to 3000μ and a diameter of 1 to 60μ.
μ. Silane treatment agents include amino-based, epoxy-based, acrylic-based, and the like. Liquid resin for casting refers to unsaturated polyester, epoxy resin, spiran resin, etc.

感光材を入れることで、型に光を通す透明タイプの合成
ゴムを使用すると、光重合も可能となる。これによって
工稈は短く、時間も早くなり、経済的になる。ヌ原型で
規定されたカバ一部より肉厚の薄い、かつ文字などのデ
ザインされた模様を入れてシ〈ことで、ケースに使われ
る材質との密賓差によって、製品処多様性をもたせるこ
とが可能である。更に挿入カバ一部に予め印刷しておく
ことで、カバ一部に浮き出た表示体を形成することがで
きる。同時にカバ一部とケース部が一体構造なので。密
閉性もよく、防水性を付加することも、問いを待たない
。このように１本発明の目的は、内部応力を低くおさえ
、防水性とデザインの多様性を付与したプラスチックケ
ースの製造九ある。つまシ、減圧下で脱泡してシい九弾
性と転写性のある液状合成ゴムを器の中に流し込む。原
型を器の中央Ｋｆｆ＜。１００℃。Photopolymerization is also possible by using transparent synthetic rubber that allows light to pass through the mold by adding a photosensitive material. This makes the culm shorter, faster, and more economical. By making the cover part thinner than the one specified in the original model, and by adding designed patterns such as letters, we can create a variety of product treatments depending on the material used for the case. is possible. Furthermore, by printing on a portion of the insertion cover in advance, a raised display can be formed on a portion of the cover. At the same time, the cover part and the case part are integrated. It has good airtightness, and adding waterproofness is a no-brainer. As described above, an object of the present invention is to manufacture a plastic case that has low internal stress, is waterproof, and has a variety of designs. After degassing under reduced pressure, liquid synthetic rubber with elasticity and transferability is poured into a container. Place the original model in the center of the container. 100℃.

１時間で加熱したの誂に原型を珍シ外し、合成ゴム３０
表面に１０μｍ以上の薄膜を作成する。再び原型をｆ針
、前述の液状合成ゴムを流し込む。１００℃、１時間徒
に合成ゴム３′が硬化した後、Ｎ型を取り出す。カバ一
部６を合成ゴム３の所定の場所に位胃決めする。注型用
合成樹脂５を減圧下で脱泡したのち、前述の合成ゴム型
３３′に注入し、ガラス板１で上下から固定する。液状
合成樹脂５の硬化Ｋ、７０℃水中で、２時間３０分間、
その後９０℃水中で２時間加熱する。合成ゴムｍ５３′
を脱型する事で注夢成形されたプラスチックケース５ｆ
１供された。After heating for 1 hour, I removed the original model and made synthetic rubber 30
A thin film of 10 μm or more is created on the surface. Using the f-needle, pour the liquid synthetic rubber into the original mold again. After the synthetic rubber 3' was cured at 100°C for one hour, the N-type was taken out. The cover part 6 is placed in a predetermined position on the synthetic rubber 3. After the synthetic resin 5 for casting is degassed under reduced pressure, it is poured into the synthetic rubber mold 33' described above, and fixed with glass plates 1 from above and below. Curing K of liquid synthetic resin 5, in water at 70°C for 2 hours and 30 minutes,
Thereafter, it is heated in water at 90°C for 2 hours. Synthetic rubber m53'
Plastic case 5f made by removing the mold.
1 was served.

以下、本発明実施例を説明する。Examples of the present invention will be described below.

実施例 合成樹脂に増感剤入りスピラン樹脂、ガラス繊維長さ１
０ｊ１１１以上で７スペクト比１０以上シラン処理剤、
合成ゴムに透明性液状加熱硬化型シリコンゴム、硬化条
件は７０℃水中で２時３０分後、９０℃水中で２時間で
加熱した。試料のＭＱＩ性は曲げ９Ｈｔ５〜ｂ　ＫＪｄ
で、アクリル樹脂製のカバ一部は、ぬき力として７４ｆ
で、ケースの硬化樹脂との密着性は良好であった。Example Synthetic resin containing sensitizer Spiran resin, glass fiber length 1
0j111 or more, 7 spectral ratio 10 or more silane treatment agent,
The synthetic rubber was transparent liquid heat-curable silicone rubber, and the curing conditions were heating in water at 70°C for 2:30 minutes and heating in water at 90°C for 2 hours. The MQI property of the sample is bending 9Ht5~b KJd
The part of the cover made of acrylic resin has a pulling force of 74f.
The adhesion with the cured resin of the case was good.

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

第１図はプラスチックケース製側り第２図は従来法によ
るパツキンを介した防水ケース図、第３図は本発明法に
よるケースとカバ一部一体構造プラスチック図。 １はガラス板　　２けビン ３は合成ゴム　　４け薄膜 ５はプラスチックケース　　６はカバ一部７はバヴキン 以　　上 出願人　株式会社　諏訪精工舎Fig. 1 shows a side view of a plastic case, Fig. 2 shows a waterproof case using a conventional method using a gasket, and Fig. 3 shows a plastic case and a partially integrated structure of a cover formed by the method of the present invention. 1 is a glass plate, 2 is a glass plate, 3 is a synthetic rubber, 4 is a thin film, 5 is a plastic case, 6 is a cover part, and 7 is more than Vavkin. Applicant: Suwa Seikosha Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 加熱することで硬化する注型用合成樹脂と、型材に弾力
性のある合成ゴムを使い、減圧下で加熱成型スるプラス
チックケースにおいて、あらかじめ成型された部品を型
の中にセットしておくことで、一体成形することを寺徴
とするグラスチックケースの製造方法。A plastic case that uses synthetic resin for casting, which hardens when heated, and synthetic rubber, which has elasticity, as the mold material, and is heat-molded under reduced pressure, with pre-molded parts set in the mold. This is a manufacturing method for glass cases that is characterized by integral molding.
JP465782A 1982-01-14 1982-01-14 Manufacture of plastic case Pending JPS58122813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP465782A JPS58122813A (en) 1982-01-14 1982-01-14 Manufacture of plastic case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP465782A JPS58122813A (en) 1982-01-14 1982-01-14 Manufacture of plastic case

Publications (1)

Publication Number Publication Date
JPS58122813A true JPS58122813A (en) 1983-07-21

Family

ID=11590008

Family Applications (1)

Application Number Title Priority Date Filing Date
JP465782A Pending JPS58122813A (en) 1982-01-14 1982-01-14 Manufacture of plastic case

Country Status (1)

Country Link
JP (1) JPS58122813A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0832726A2 (en) * 1996-09-25 1998-04-01 Shonan Design Co., Ltd. Replica molding
EP0856389A2 (en) * 1997-01-31 1998-08-05 Shonan Design Co., Ltd. Form for manufacturing resin mold and clamping jig for resin mold
WO2001091984A1 (en) * 2000-05-30 2001-12-06 Swift Technologies Limited Flexible moulds for injection moulding and injection moulding methods using same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0832726A2 (en) * 1996-09-25 1998-04-01 Shonan Design Co., Ltd. Replica molding
EP0832726A3 (en) * 1996-09-25 2000-04-26 Shonan Design Co., Ltd. Replica molding
EP0856389A2 (en) * 1997-01-31 1998-08-05 Shonan Design Co., Ltd. Form for manufacturing resin mold and clamping jig for resin mold
EP0856389A3 (en) * 1997-01-31 1998-12-30 Shonan Design Co., Ltd. Form for manufacturing resin mold and clamping jig for resin mold
US6254370B1 (en) 1997-01-31 2001-07-03 Shonan Design Co., Ltd. Form for manufacturing resin mold and clamping jig for resin mold
WO2001091984A1 (en) * 2000-05-30 2001-12-06 Swift Technologies Limited Flexible moulds for injection moulding and injection moulding methods using same

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