JPH059247B2 - - Google Patents

Info

Publication number
JPH059247B2
JPH059247B2 JP63275165A JP27516588A JPH059247B2 JP H059247 B2 JPH059247 B2 JP H059247B2 JP 63275165 A JP63275165 A JP 63275165A JP 27516588 A JP27516588 A JP 27516588A JP H059247 B2 JPH059247 B2 JP H059247B2
Authority
JP
Japan
Prior art keywords
mold
push button
button panel
resin
thermoplastic elastomer
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.)
Expired - Fee Related
Application number
JP63275165A
Other languages
Japanese (ja)
Other versions
JPH02121815A (en
Inventor
Tsuneyuki Yamanaka
Shunji Fujimura
Fujio Mori
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.)
Nissha Printing Co Ltd
Original Assignee
Nissha Printing Co Ltd
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 Nissha Printing Co Ltd filed Critical Nissha Printing Co Ltd
Priority to JP63275165A priority Critical patent/JPH02121815A/en
Publication of JPH02121815A publication Critical patent/JPH02121815A/en
Publication of JPH059247B2 publication Critical patent/JPH059247B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection 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
    • B29C45/14827Injection 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 using a transfer foil detachable from the insert
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/46Knobs or handles, push-buttons, grips
    • B29L2031/466Keypads, keytops
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00Tactile feedback
    • H01H2215/004Collapsible dome or bubble
    • H01H2215/008Part of substrate or membrane
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00Manufacturing
    • H01H2229/044Injection moulding
    • H01H2229/047Preformed layer in mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Manufacture Of Switches (AREA)

Description

【発明の詳现な説明】[Detailed description of the invention] 【産業䞊の利甚分野】[Industrial application field]

この発明は、耇数個の抌しボタンが連続しお圢
成された匟性䜓からなる抌しボタンパネルを、ベ
ヌスを射出成型法によ぀お圢成するのず同時に接
点を転写法によ぀お圢成する抌しボタンパネルを
補造する方法に関する。
This invention provides a push button panel made of an elastic body in which a plurality of push buttons are formed in series, and in which a base is formed by an injection molding method and contacts are formed by a transfer method at the same time. Relating to a method of manufacturing.

【埓来の技術】[Conventional technology]

抌しボタンパネルずは、倚数の抌しボタン郚
がスカヌト郚を介しおベヌス郚に䞀䜓
的に圢成され、抌しボタン郚の裏面には接点
が圢成され、党䜓が可撓性を有するものであ
る第図参照。抌しボタンパネルはスむツチ
の可動偎接点ずなり、別に甚意された固定偎接点
ず組み合わされお抌しボタンを構成する。 このような抌しボタンパネルは、電卓・リモコ
ン・電話機などの抌しボタンスむツチに利甚され
おいる。抌しボタンパネルの補造方法は、抌しボ
タン郚の圢状のキダビテむを有する金型に加硫し
たシリコン導電ゎムを眮き、次いでこの䞊に文字
や色分けパタヌンなどになる未加硫の着色シリコ
ンゎムを眮き、プレス成型あるいはトランスフア
ヌ成型によ぀お加熱・加圧しお、倚数の抌しボタ
ン郚ずスカヌト郚ずベヌス郚ず接点ずを䞀䜓化し
お圢成するものであ぀た。この方法は、䞊蚘した
ように工皋の倚い時間のかかる方法である。 最近、熱可塑性゚ラストマヌ暹脂を射出成型し
お䜿甚するこずにより、加硫工皋を省き成型加工
のサむクルを短瞮しおコストダりンを図぀た方法
がある。぀たり、抌しボタンパネルのベヌスを射
出成型にお圢成し、その埌ベヌスの抌しボタン郚
の裏面に接点を圢成する方法である。接点を圢成
する手段ずしおは、スクリヌン印刷やタンポ印刷
などの印刷法や、筆塗などの方法にお導電むンキ
を塗垃し、次いで加熱しお也燥する方法、あるい
はプラスチツクシヌト䞊に接点パタヌンを圢成し
た転写シヌトを甚意し、この接点パタヌンを転写
する方法がある。しかし、これらの方法においお
も、接点および衚瀺パタヌンを圢成する工皋は䟝
然ずしお残぀おいた。たた、熱可塑性゚ラストマ
ヌ暹脂はシリコンゎムに比べお耐熱性が劣るた
め、衚面文字や接点郚の印刷を也燥するずきに加
わる熱により、スカヌト郚が倉圢するこずもあ぀
た。 そこで、接点を容易にか぀倧量に圢成する方法
ずしお、接点パタヌンが圢成された転写シヌトを
射出成型甚金型内に固定し、抌しボタンパネルを
射出成型で圢成するのず同時に接点を圢成するこ
ずを怜蚎した。
A push button panel is a panel with a large number of push button parts 2.
1 is integrally formed on the base part 23 via the skirt part 22, and a contact point 24 is formed on the back surface of the push button part 21, so that the entire push button part 21 has flexibility (see FIG. 3). The push button panel becomes the movable contact of the switch, and is combined with a separately prepared fixed contact to form the push button. Such push-button panels are used in push-button switches for calculators, remote controls, telephones, and the like. The method for manufacturing push button panels is to place vulcanized silicone conductive rubber in a mold with a cavity in the shape of the push button section, then place unvulcanized colored silicone rubber on top of it to form letters, color-coded patterns, etc. A large number of push button parts, a skirt part, a base part, and a contact point are integrally formed by heating and pressurizing them by press molding or transfer molding. As mentioned above, this method is a time-consuming method with many steps. Recently, there has been a method of using injection molded thermoplastic elastomer resin to omit the vulcanization step, shorten the molding cycle, and reduce costs. In other words, this is a method in which the base of the push button panel is formed by injection molding, and then the contacts are formed on the back surface of the push button portion of the base. Contacts can be formed by printing methods such as screen printing or pad printing, by applying conductive ink by brush painting, and then heating and drying it, or by forming a contact pattern on a plastic sheet. There is a method of preparing a transfer sheet and transferring this contact pattern. However, even in these methods, the steps of forming contacts and display patterns still remain. Furthermore, since thermoplastic elastomer resin has poorer heat resistance than silicone rubber, the skirt portion may become deformed due to the heat applied when drying the surface letters and contact area printing. Therefore, as a method for easily forming contacts in large quantities, a transfer sheet with a contact pattern formed thereon is fixed in an injection mold, and the contacts are formed at the same time as the push button panel is formed by injection molding. It was investigated.

【発明が解決しようずする課題】[Problem to be solved by the invention]

通垞、抌しボタンパネルを射出成型で圢成する
には、金型のゲヌトを各抌しボタン郚の裏面に配
眮する。抌しボタンパネルには、抌しボタン郚
に埩原力ずクリツク感を付䞎するために、スカ
ヌト郚が圢成されおいる第図参照。ス
カヌト郚は肉厚が薄いので、抌しボタン郚
のそれぞれの裏面にゲヌトを蚭けなければ熱可
塑性゚ラストマヌ暹脂が成型品の隅々たでたわら
ない。しかし、抌しボタンシヌトの圢成ず同時に
接点を転写シヌトを利甚しお圢成する方法に
おいお、金型内では抌しボタン郚の裏面の接
点が圢成される箇所に転写シヌトが䜍眮す
る。したが぀お、転写シヌトを甚いお接点を
圢成するには、熱可塑性゚ラストマヌ暹脂を射出
するゲヌトを抌しボタン郚の裏面にも぀おく
るこずができず、ゲヌトを移動させる必芁があ
る。しかも、肉厚の薄いスカヌト郚ぞも均䞀
に暹脂が充填されるようにしなければならない。
しかし、ベヌス郚のサむドにゲヌトを蚭ける
ず熱可塑性゚ラストマヌ暹脂が隅々たでたわら
ず、たた抌しボタン郚の倩面にゲヌトを蚭け
るず抌しボタン郚の衚面にゲヌトの跡が残
る。 この発明は、このような欠点を解消し、ベヌス
を射出成型法によ぀お圢成するのず同時に接点を
転写法によ぀お圢成するこずのできる抌しボタン
パネルを補造する方法を提䟛するこずを目的ずす
る。
Typically, when a pushbutton panel is formed by injection molding, a mold gate is placed on the back side of each pushbutton section. The push button panel has push button section 2.
A skirt portion 22 is formed in order to provide restoring force and a click feeling to 1 (see FIG. 3). Since the skirt portion 22 is thin, the push button portion 2
Unless gates are provided on the back surfaces of each of the molded parts, the thermoplastic elastomer resin will not reach every corner of the molded product. However, in the method of forming the contacts 24 using a transfer sheet at the same time as forming the push button sheet, the transfer sheet is located in the mold at a location on the back surface of the push button section 21 where the contacts 24 are to be formed. Therefore, in order to form the contact point 24 using a transfer sheet, the gate for injecting the thermoplastic elastomer resin cannot be brought to the back surface of the push button section 21, and the gate must be moved. Moreover, it is necessary to ensure that the thin skirt portion 22 is evenly filled with the resin.
However, if a gate is provided on the side of the base portion 23, the thermoplastic elastomer resin will not reach every corner, and if a gate is provided on the top surface of the push button portion 21, traces of the gate will remain on the surface of the push button portion 21. The object of the present invention is to eliminate such drawbacks and provide a method for manufacturing a push button panel in which the base can be formed by injection molding and the contacts can be formed by transfer method at the same time. shall be.

【課題を解決するための手段】[Means to solve the problem]

この発明は、前蚘した目的を達成するために、
剥離性を有する基䜓シヌト䞊に接点パタヌン又
は及び衚瀺パタヌンが圢成された転写シヌトを
射出成型甚金型内に䜍眮合わせしお固定し、次い
で金型をスカヌト郚の厚みが0.3〜1.5mmの金型タ
ツチの状態ずし、その埌熱可塑性゚ラストマヌ暹
脂を金型のキダビテむ内に射出し、続いお金型を
スカヌト郚の厚みが0.1〜0.5mmになるたで型締め
し、熱可塑性゚ラストマヌ暹脂の冷华固化を埅぀
お金型の型開きを行い、金型から成型品を取り出
しお基䜓シヌトを剥離するように構成した。 図面を参照しながらこの発明をさらに詳しく説
明する。第〜図はこの発明の抌しボタンパネ
ルの補造工皋を瀺す断面図である。は転
写シヌト、は基䜓シヌト、は接点パタ
ヌン、は金型、は固定型、は可動型、は
キダビテむ、は熱可塑性゚ラストマヌ暹脂、
は衚瀺パタヌンをそれぞれ瀺す。 たず、接点パタヌンが圢成された転写シヌト
を甚意する。 転写シヌトは、剥離性を有する基䜓シヌト
䞊に接点パタヌンが圢成されたものである。基
䜓シヌトずしおは、耐熱性を有するプラスチツ
クフむルムを䜿甚する。たずえば、ポリ゚ステル
フむルム・ポリ゚チレンフむルム・ポリプロピレ
ンフむルム・ナむロンフむルムなどを甚いるこず
ができ、䞭でも耐熱性・成型性・寞法安定性など
の性質に優れたポリ゚ステルフむルムが奜適であ
る。この基䜓シヌトの䞊に、メラミン系暹脂を
コヌテむングするなどの手段にお離型凊理を斜す
ずよい。接点パタヌンずしおは、カヌボンやグ
ラフアむトなどの炭玠化合物からなる導電性むン
キ、あるいは銀・銅・ニツケル・アルミニりムな
どの金属からなる導電性むンキを甚い、スクリヌ
ン印刷法やグラビア印刷法などの手段にお圢成す
る。たた、必芁に応じお接点パタヌンの䞊に接
着局を圢成しおおいおもよい。接着局は、接点パ
タヌンず成型品ずを匷固に接着するための局で
ある。接着局ずしおは、導電むンキず熱可塑性゚
ラストマヌ暹脂ずの䞡者に察する接着性が良奜
な接着剀、たずえばポリりレタン系・ポリ゚ステ
ル系・ポリオレフむン系などの接着剀を適宜遞択
しお䜿甚するずよい。 このような構成の転写シヌトを甚い、射出成
型法を利甚しお抌しボタンパネルを補造する。 たず、抌しボタンパネル成型甚の射出成型甚金
型の抌しボタン郚ず転写シヌトの接点パタヌ
ンずを䜍眮合わせしお、転写シヌトを金型
に固定する。この際、接点パタヌンず埌述する
熱可塑性゚ラストマヌ暹脂ずが接する向きに転
写シヌトを固定する。 次いで、金型を金型タツチの状態にする第
図参照。金型タツチずは、金型を閉じた
状態にしおキダビテむを圢成し、そこに熱可塑
性゚ラストマヌ暹脂の充填が可胜な状態であ
り、型締め力がKgcm2の状態をいう。この時点
で、スカヌト郚の肉厚が0.3〜1.5mmであるこ
ずが重芁である。最終成型品の肉厚よりもスカヌ
ト郚が厚くな぀おいるので、キダビテむ内
で暹脂の流れが良奜になる。 続いお、金型のキダビテむ内に熱可塑性゚
ラストマヌ暹脂を射出する。熱可塑性゚ラスト
マヌ暹脂ずしおは、䌞び100〜1400、硬さ30
〜99JIS 、奜たしくは䌞び300〜700、硬さ
35〜95JIS を有し、匟性回埩率が高く、耐
油性・耐薬品性に優れたものを甚いるずよい。た
ずえば、ポリアミド゚ラストマヌ・ポリ゚ステル
゚ラストマヌ・りレタン゚ラストマヌ・オレフむ
ン゚ラストマヌなどの熱可塑性゚ラストマヌ暹脂
を䜿甚するこずができる。たた、この工皋におけ
る金型や熱可塑性゚ラストマヌ暹脂の枩床は
暹脂の皮類や成型品の圢状により異なるが、金型
枩床はおよそ20〜60℃、暹脂枩床は160〜230℃の
範囲ずする。 次に、金型を型締めする第図参照。
この工皋がこの発明でも぀ずも重芁な点である。
キダビテむ内に熱可塑性゚ラストマヌ暹脂が
射出された埌にただちに型締めを行うこずによ぀
お、熱可塑性゚ラストマヌ暹脂が圧瞮されお金
型のキダビテむ内に抌し広げられる。このず
き、熱可塑性゚ラストマヌ暹脂の射出甚ノズル
の先端は閉じられおいる図瀺せず。たた、サ
むドゲヌト郚分もキダビテむが移動し、閉じら
れるようにするずよい。金型の圧瞮ストロヌク
は、0.2〜1.0mmが奜たしい。抌しボタンパネルに
おいお、ベヌス郚の肉厚はハりゞングに装着
するために厚く、スカヌト郚の肉厚は埩元性
ずクリツク性を付䞎するために薄くする必芁があ
り、成型品の肉厚の差が倧きく、圧瞮ストロヌク
が0.2mmに満たない堎合は薄肉であるスカヌト郚
が充填䞍足ずな぀たり、り゚ルドが発生しお
打鍵匷床が䞍足したりする。たた、圧瞮ストロヌ
クが1.0mmを越える堎合は圧瞮の途䞭で暹脂の固
化が始たり十分に圧瞮するこずができず、成型品
に歪みが生じる。このようにしおスカヌト郚
の肉厚は、0.1〜0.5mmずなる。型締め力は熱可塑
性゚ラストマヌ暹脂の皮類や成型品の圢状によ
り異なる。たた型締め力の加え方は、始めは匱く
次に匷くなるように、段階以䞊に分けお圧瞮す
るこずも可胜である。 次に、熱可塑性゚ラストマヌ暹脂の冷华・固
化を埅぀お金型を開き、成型品を取り出し、基
䜓シヌトを剥離しお抌しボタンパネルが完成す
る。 たた、抌しボタン郚の倩面に衚瀺パタヌン
を圢成する堎合には、次のようにするずよい。 たず、衚瀺パタヌン甚の転写シヌトを別に
甚意する。転写シヌトは、基䜓シヌト䞊
に剥離局が圢成され、次いでその䞊に衚瀺パタヌ
ンが圢成され、さらにその䞊に接着局が圢成
されたものである。基䜓シヌトずしおは、接
点パタヌン甚の転写シヌトに䜿甚する基䜓シヌ
トず同様のものを䜿甚するずよい。たた、剥離
局は抌しボタン郚の倩面に圢成された衚瀺パ
タヌンを保護する局ずなるので、耐摩耗性・耐人
油性を有するもので圢成するずよい。特に、玫倖
線たたは電子線硬化型のアクリル暹脂が良奜であ
る。衚瀺パタヌンは、文字・数字・蚘号など
の衚瀺や機胜を瀺す色分けなどを衚珟するパタヌ
ンに圢成される。接着局は、接点パタヌン甚の転
写シヌトに䜿甚する接着局ず同様のものを䜿甚す
るずよい。 たた、金型ずしおは、抌しボタン郚の高
さが䜎い堎合は前蚘した金型をそのたた䜿甚す
るこずができる。抌しボタン郚の高さが高い
堎合は衚瀺甚転写シヌトが固定型のキダビ
テむ内に密着せずにシワにな぀たり砎れたりする
ので、固定型がキダビテむの抌しボタン郚倩
面で分割されるように構成されおいる割型ずな぀
おいるものを甚意する。 このような構造の金型に、皮の転写シヌト
を固定する。接点パタヌン甚の転写シヌトを金
型の可動型偎に䜍眮合わせしお、固定する。
この際、接点パタヌンず熱可塑性゚ラストマヌ
暹脂ずが接する向きに転写シヌトを固定す
る。 たた、衚瀺パタヌン甚の転写シヌトを固定
型偎に䜍眮合わせしお固定する。この際、衚瀺
パタヌンず熱可塑性゚ラストマヌ暹脂ずが
接する向きに転写シヌトを固定する。固定型
が割型ずな぀おいる堎合は、固定型の間に䜍
眮合わせしお固定する。割型を閉じるこずにより
転写シヌトは固定される。たた、転写シヌト
には、固定型のスプルヌランナヌ郚に盞圓
する郚分に暹脂が通過するための穎をあらかじめ
圢成しおおく。転写シヌトに穎を圢成するに
は、転写シヌトが成型工皋にはいる前に所定
の䜍眮に穎開け機構により穿孔するずよい。た
た、固定型のスプルヌランナヌ郚に刃を圢成し
おおき、転写シヌトの固定ず同時に穿孔され
るように構成しおもよい。 次いで、金型を金型タツチの状態にし第
図参照、前蚘した方法ず同様にしお抌しボタ
ンパネルを圢成する第図参照。このよう
にしお、抌しボタン郚の倩面に衚瀺パタヌンが圢
成された抌しボタンパネルが完成する。
In order to achieve the above-mentioned object, this invention
A transfer sheet on which a contact pattern and/or a display pattern are formed on a releasable base sheet is aligned and fixed in an injection mold, and then the mold is placed in a mold with a skirt portion having a thickness of 0.3 to 1.5 mm. After touching the mold, the thermoplastic elastomer resin is injected into the cavity of the mold, and then the mold is clamped until the skirt part has a thickness of 0.1 to 0.5 mm, and the thermoplastic elastomer resin is cooled and solidified. The mold was opened after waiting, the molded product was taken out from the mold, and the base sheet was peeled off. The present invention will be explained in more detail with reference to the drawings. 1 and 2 are cross-sectional views showing the manufacturing process of the push button panel of the present invention. 1 and 11 are transfer sheets, 2 and 12 are base sheets, 3 is a contact pattern, 4 is a mold, 5 is a fixed mold, 6 is a movable mold, 7 is a cavity, 8 is a thermoplastic elastomer resin, 1
3 indicates display patterns, respectively. First, a transfer sheet 1 on which a contact pattern 3 is formed is prepared. The transfer sheet 1 includes a base sheet 2 having removability.
A contact pattern 3 is formed on the top. As the base sheet 2, a heat-resistant plastic film is used. For example, polyester film, polyethylene film, polypropylene film, nylon film, etc. can be used, and polyester film, which has excellent properties such as heat resistance, moldability, and dimensional stability, is particularly suitable. The base sheet 2 may be subjected to mold release treatment by coating with a melamine resin or the like. For the contact pattern 3, a conductive ink made of a carbon compound such as carbon or graphite, or a conductive ink made of a metal such as silver, copper, nickel, or aluminum is used, and it can be printed by means such as screen printing or gravure printing. to form. Further, an adhesive layer may be formed on the contact pattern 3 if necessary. The adhesive layer is a layer for firmly adhering the contact pattern 3 and the molded product. As the adhesive layer, an adhesive having good adhesion to both the conductive ink and the thermoplastic elastomer resin 8, such as a polyurethane adhesive, a polyester adhesive, a polyolefin adhesive, etc., may be appropriately selected and used. Using the transfer sheet 1 having such a configuration, a push button panel is manufactured using an injection molding method. First, the push button part of the injection mold 4 for molding the push button panel and the contact pattern 3 of the transfer sheet 1 are aligned, and the transfer sheet 1 is placed in the mold 4.
Fixed to. At this time, the transfer sheet 1 is fixed in such a direction that the contact pattern 3 and the thermoplastic elastomer resin 8, which will be described later, are in contact with each other. Next, the mold 4 is brought into a mold-touch state (see FIG. 1a). Mold touching refers to a state in which the mold 4 is closed to form the cavity 7, the thermoplastic elastomer resin 8 can be filled therein, and the mold clamping force is 0 kg/cm 2 . At this point, it is important that the wall thickness of the skirt portion 22 is between 0.3 and 1.5 mm. Since the skirt portion 22 is thicker than the wall thickness of the final molded product, resin flows well within the cavity 7. Subsequently, thermoplastic elastomer resin 8 is injected into cavity 7 of mold 4. Thermoplastic elastomer resin 8 has an elongation of 100 to 1400% and a hardness of 30.
~99 (JIS A), preferably elongation 300-700%, hardness
35 to 95 (JIS A), a high elastic recovery rate, and excellent oil resistance and chemical resistance. For example, thermoplastic elastomer resins such as polyamide elastomer, polyester elastomer, urethane elastomer, and olefin elastomer can be used. In addition, the temperature of the mold 4 and thermoplastic elastomer resin 8 in this process varies depending on the type of resin and the shape of the molded product, but the mold temperature should be approximately 20 to 60°C, and the resin temperature should be in the range of 160 to 230°C. . Next, the mold 4 is clamped (see FIG. 1b).
This step is the most important point in this invention.
By clamping the mold immediately after the thermoplastic elastomer resin 8 is injected into the cavity 7, the thermoplastic elastomer resin 8 is compressed and forced into the cavity 7 of the mold 4. At this time, the tip of the injection nozzle for the thermoplastic elastomer resin 8 is closed (not shown). Further, it is preferable that the side gate portion is also closed by moving the cavity 7. The compression stroke of the mold 4 is preferably 0.2 to 1.0 mm. In the push button panel, the wall thickness of the base part 24 is thick in order to attach it to the housing, and the wall thickness of the skirt part 22 needs to be thin in order to provide resilience and clickability. If the compression stroke is large and the compression stroke is less than 0.2 mm, the thin skirt portion 22 may be insufficiently filled, or welds may occur, resulting in insufficient keying strength. Furthermore, if the compression stroke exceeds 1.0 mm, the resin will solidify during compression and cannot be compressed sufficiently, causing distortion in the molded product. In this way, the skirt portion 22
The wall thickness is 0.1 to 0.5 mm. The mold clamping force varies depending on the type of thermoplastic elastomer resin 8 and the shape of the molded product. Furthermore, the mold clamping force can be applied in two or more stages, such that the mold clamping force is initially weak and then becomes stronger. Next, after waiting for the thermoplastic elastomer resin 8 to cool and solidify, the mold 4 is opened, the molded product is taken out, and the base sheet 2 is peeled off to complete the push button panel. Further, when forming a display pattern on the top surface of the push button section 21, it is preferable to do as follows. First, a transfer sheet 11 for display patterns is separately prepared. The transfer sheet 11 has a release layer formed on a base sheet 12, a display pattern 13 formed thereon, and an adhesive layer further formed thereon. As the base sheet 12, it is preferable to use the same base sheet 2 used for the transfer sheet 1 for contact patterns. Further, since the release layer serves as a layer for protecting the display pattern formed on the top surface of the push button section 21, it is preferably formed of a material having wear resistance and human oil resistance. In particular, ultraviolet or electron beam-curable acrylic resins are suitable. The display pattern 13 is formed into a pattern expressing characters, numbers, symbols, etc., and color coding indicating functions. As the adhesive layer, it is preferable to use the same adhesive layer as used in the transfer sheet for contact patterns. Moreover, as the mold 4, when the height of the push button portion 21 is low, the mold 4 described above can be used as is. If the height of the push button section 21 is high, the display transfer sheet 11 will not fit tightly into the cavity of the fixed mold 5 and may wrinkle or tear. Prepare a split mold that is configured to be divided. Two types of transfer sheets are fixed to the mold 4 having such a structure. The contact pattern transfer sheet 1 is aligned with the movable mold 6 side of the mold 4 and fixed.
At this time, the transfer sheet 1 is fixed in such a direction that the contact pattern 3 and the thermoplastic elastomer resin 8 are in contact with each other. Further, the display pattern transfer sheet 11 is aligned and fixed on the fixed mold 5 side. At this time, the transfer sheet 11 is fixed in such a direction that the display pattern 13 and the thermoplastic elastomer resin 8 are in contact with each other. When the fixed mold 5 is a split mold, it is aligned and fixed between the fixed molds 5. The transfer sheet 11 is fixed by closing the split mold. Furthermore, holes for the resin to pass through are previously formed in the transfer sheet 11 at portions corresponding to the sprue runner portions of the fixed mold 5. In order to form holes in the transfer sheet 11, it is preferable to punch holes at predetermined positions using a hole punching mechanism before the transfer sheet 11 enters the molding process. Alternatively, a blade may be formed in the sprue runner portion of the fixed mold 5 so that the sprue runner is perforated at the same time as the transfer sheet 11 is fixed. Next, the mold 4 is brought into the mold touch state (the second
(see FIG. 2b), and a pushbutton panel is formed in the same manner as described above (see FIG. 2b). In this way, a push button panel with a display pattern formed on the top surface of the push button section is completed.

【䜜甚】[Effect]

たず、転写シヌトの抌しボタンパネル成型甚
の射出成型甚金型の抌しボタン郚のパタヌンず
接点パタヌンずが䜍眮合わせされ、転写シヌト
が金型内に固定される。 次に、金型が閉じられ、金型タツチの状態に
なる。このずき、型締め力はKgcm2である。 続いお熱可塑性゚ラストマヌ暹脂が金型の
キダビテむ内に射出される。熱可塑性゚ラスト
マヌ暹脂は金型のキダビテむ内を満たす。
型締め力ず暹脂の射出圧力ずを比范するず、射出
圧力の方が倧きいので成型品はキダビテむの初期
圢状よりも厚目になる。たた、キダビテむの隅々
たで熱可塑性゚ラストマヌ暹脂が行き枡る。 たた、転写シヌトはキダビテむ内で熱可塑
性゚ラストマヌ暹脂に抌されおキダビテむ内
壁に密着する。転写シヌトに圢成されおいる接
点パタヌンは熱可塑性゚ラストマヌ暹脂ず金
型の熱によ぀お衚面が溶融し、射出された熱可
塑性゚ラストマヌ暹脂ず䞀䜓化する。 その埌ただちに金型が締められる。ここで成
型品に圧力がかかり、所望の厚みに成型品が圢成
される。 熱可塑性゚ラストマヌ暹脂の冷华・固化埌金
型が開かれ、成型品ずずもに転写シヌトが取
り出される。 次いで、成型品の裏面から基䜓シヌトが剥さ
れるず、基䜓シヌトず接点パタヌンずの界面
で剥離しお抌しボタン郚の裏面に接点が
圢成され、抌しボタンパネルが完成する。
First, the pattern of the push button part of the injection mold 4 for molding the push button panel of the transfer sheet 1 and the contact pattern 3 are aligned, and the transfer sheet 1 is fixed in the mold 4. Next, the mold 4 is closed and the mold is in a closed state. At this time, the mold clamping force was 0 kg/cm 2 . Subsequently, thermoplastic elastomer resin 8 is injected into cavity 7 of mold 4 . The thermoplastic elastomer resin 8 fills the cavity 7 of the mold 4.
Comparing the mold clamping force and the resin injection pressure, the injection pressure is greater, so the molded product becomes thicker than the initial shape of the cavity. Furthermore, the thermoplastic elastomer resin 8 is spread throughout the cavity. Further, the transfer sheet 1 is pressed by the thermoplastic elastomer resin 8 within the cavity 7 and comes into close contact with the inner wall of the cavity 7 . The surface of the contact pattern 3 formed on the transfer sheet 1 is melted by the heat of the thermoplastic elastomer resin 8 and the mold 4, and is integrated with the injected thermoplastic elastomer resin 8. The mold 4 is then immediately tightened. Here, pressure is applied to the molded product, and the molded product is formed to the desired thickness. After cooling and solidifying the thermoplastic elastomer resin 8, the mold 4 is opened and the transfer sheet 1 is taken out together with the molded product. Next, when the base sheet 2 is peeled off from the back side of the molded product, the base sheet 2 is peeled off at the interface between the base sheet 2 and the contact pattern 3, and the contacts 24 are formed on the back side of the push button part 21, thereby completing a push button panel.

【実斜䟋】【Example】

実斜䟋  厚さ38ÎŒmのポリ゚チレンテレフタレヌトフむ
ルムを基䜓シヌトずし、この䞊にメラミン暹脂か
らなる剥離局をグラビア印刷法で圢成しお離型凊
理を斜した。続いお、りレタン暹脂からなるバむ
ンダヌを含む熱可塑性カヌボンむンキを甚いお、
接点パタヌンをスクリヌン印刷法で圢成し、さら
にその䞊にポリりレタン系暹脂からなる接着局を
同様のパタヌンで印刷し、転写シヌトを䜜補し
た。 この転写シヌトを射出成型甚金型内に䜍眮合わ
せを行぀お固定し、型締めの状態より1.0mm金型
の開いた䜍眮たで金型を閉じお金型タツチの状態
ずし、続いお成型甚金型のキダビテむ内に加熱溶
融した熱可塑性ポリ゚ステル゚ラストマヌ暹脂を
䞋蚘の条件で射出した。 射出条件 日本補鋌所補射出成型機JT70−40V䜿
甚 ・金型枩床 35℃ ・シリンダヌ枩床 NH195℃ H2195℃ 180℃ ・射出圧力 600Kgcm2 ・射出速床 99 次いで、800Kgcm2で型締めを行い、熱可塑性
゚ラストマヌ暹脂の冷华・固化埌、金型を開き、
基䜓シヌトが剥離され成型されたベヌスを取り出
した。 このようにしお抌しボタンパネルを埗た。この
抌しボタンパネルは、スカヌト郚の肉厚は0.2mm
で倉圢やクラツクも生じおおらず、たた荷重500
・打鍵速床回秒にお20䞇回の動䜜寿呜詊隓
にクリアするものであ぀た。 実斜䟋  実斜䟋で甚いた転写シヌトを接点パタヌン甚
転写シヌトずした。 たた、厚さ38ÎŒmのポリ゚チレンテレフタレヌ
トフむルムを基䜓シヌトずし、この䞊に゚ポキシ
暹脂からなる離型局を、その䞊に玫倖線硬化型ア
クリル暹脂からなる剥離局をそれぞれグラビア印
刷法で圢成した。続いお、熱可塑性アクリル暹脂
からなる衚瀺パタヌンを、さらにその䞊にポリ゚
ステル系暹脂からなる接着局をそれぞれグラビア
印刷法で圢成し、最埌に玫倖線を照射しお剥離局
を硬化し、衚瀺パタヌン甚転写シヌトを䜜補し
た。 これらの転写シヌトを、固定型がキダビテむの
抌しボタン郚倩面で分割されるように構成されお
いる割型ずな぀おいる射出成型甚金型内にそれぞ
れ䜍眮合わせを行぀お固定し、型締めの状態より
1.0mm金型の開いた䜍眮たで金型を閉じお金型タ
ツチの状態ずし、続いお成型甚金型のキダビテむ
内に加熱溶融した熱可塑性ポリ゚ステル゚ラスト
マヌ暹脂を䞋蚘の条件で射出した。 射出条件 日本補鋌所補射出成型機JT70−40V䜿
甚 ・金型枩床 40℃ ・シリンダヌ枩床 NH225℃ H2230℃ 200℃ ・射出圧力 580Kgcm2 ・射出速床 50 次いで、800Kgcm2で型締めを行い、熱可塑性
゚ラストマヌ暹脂の冷华・固化埌、金型を開き、
基䜓シヌトが剥離され成型されたベヌスを取り出
した。 このようにしお抌しボタンパネルを埗た。抌し
ボタン郚の高さは10mmでその倩面に圢成された衚
瀺パタヌンは、パタヌンの倉化や䜍眮ずれもなく
矎麗なものであ぀た。
Example 1 A polyethylene terephthalate film having a thickness of 38 ÎŒm was used as a base sheet, and a release layer made of melamine resin was formed thereon by a gravure printing method, and a release treatment was performed. Next, using thermoplastic carbon ink containing a binder made of urethane resin,
A contact pattern was formed by screen printing, and an adhesive layer made of polyurethane resin was printed in the same pattern on top of the contact pattern to produce a transfer sheet. This transfer sheet is aligned and fixed in the injection mold, and the mold is closed to a 1.0 mm open position from the mold clamp state to the mold touch state, and then the mold is closed. A heated and melted thermoplastic polyester elastomer resin was injected into the mold cavity under the following conditions. Injection conditions (Japan Steel Works injection molding machine: JT70-40V used) - Mold temperature 35℃ - Cylinder temperature NH: 195℃ H2: 195℃ H: 180℃ - Injection pressure 600Kg/cm 2 - Injection speed 99% , the mold is clamped at 800Kg/ cm2 , and after the thermoplastic elastomer resin has cooled and solidified, the mold is opened.
The base sheet was peeled off and the molded base was taken out. A pushbutton panel was thus obtained. The thickness of the skirt part of this push button panel is 0.2mm.
There was no deformation or crack, and the load was 500.
It passed the operating life test of 200,000 times at a keystroke speed of 2 g/sec. Example 2 The transfer sheet used in Example 1 was used as a contact pattern transfer sheet. Further, a polyethylene terephthalate film with a thickness of 38 ÎŒm was used as a base sheet, and a release layer made of an epoxy resin was formed thereon, and a release layer made of an ultraviolet curable acrylic resin was formed thereon by a gravure printing method. Next, a display pattern made of thermoplastic acrylic resin and an adhesive layer made of polyester resin are formed on top of the display pattern using gravure printing.Finally, the release layer is cured by irradiation with ultraviolet rays, and the display pattern transfer is completed. A sheet was produced. These transfer sheets are aligned and fixed in the injection mold, which is a split mold in which the fixed mold is divided at the top surface of the push button part of the cavity, and then the mold is clamped. from the state of
The mold was closed to the open position of the 1.0 mm mold to bring the mold into a touch state, and then heated and melted thermoplastic polyester elastomer resin was injected into the cavity of the molding mold under the following conditions. Injection conditions (Japan Steel Works injection molding machine: JT70-40V used) - Mold temperature 40℃ - Cylinder temperature NH: 225℃ H2: 230℃ H: 200℃ - Injection pressure 580Kg/cm 2 - Injection speed 50% , the mold is clamped at 800Kg/ cm2 , and after the thermoplastic elastomer resin has cooled and solidified, the mold is opened.
The base sheet was peeled off and the molded base was taken out. A pushbutton panel was thus obtained. The height of the push button part was 10 mm, and the display pattern formed on the top surface was beautiful with no pattern changes or positional deviations.

【発明の効果】【Effect of the invention】

この発明の抌しボタンパネルの補造方法は、剥
離性を有する基䜓シヌト䞊に接点パタヌン又は
及び衚瀺パタヌンが圢成された転写シヌトを射出
成型甚金型内に䜍眮合わせしお固定し、次いで金
型を金型タツチの状態ずし、その埌熱可塑性゚ラ
ストマヌ暹脂を金型のキダビテむ内に射出し、続
いお金型を型締めし、熱可塑性゚ラストマヌ暹脂
の冷华固化を埅぀お金型の型開きを行い、金型か
ら成型品を取り出すように構成したものであるの
で、熱可塑性゚ラストマヌ暹脂が隅々たで行き枡
぀たきれいな抌しボタンパネルを補造するこずが
できる。 たた、抌しボタン郚の䞊面にゲヌトを配眮する
必芁がなく、しかもゲヌトの数を倧幅に枛らすこ
ずが可胜ずなるので、金型の補䜜日数および費甚
を倧幅に節玄するこずができる。
The method for manufacturing a push button panel of the present invention includes forming a contact pattern or/and
and the transfer sheet on which the display pattern is formed are aligned and fixed in the injection mold, the mold is brought into the mold touch state, and then the thermoplastic elastomer resin is injected into the cavity of the mold, Next, the mold is closed, the thermoplastic elastomer resin is cooled and solidified, and then the mold is opened and the molded product is taken out of the mold, so the thermoplastic elastomer resin is poured into every corner. It is possible to manufacture beautiful push button panels that are spread all over the place. Further, since it is not necessary to arrange a gate on the upper surface of the push button part, and the number of gates can be significantly reduced, the number of days and costs for manufacturing the mold can be significantly reduced.

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

第〜図はこの発明の抌しボタンパネルの補
造工皋を瀺す断面図である。第図は埓来の抌し
ボタンパネルの断面図である。   転写シヌト、  基䜓シ
ヌト、  接点パタヌン、  金型、  
固定型、  可動型、  キダビテむ、 
 熱可塑性゚ラストマヌ暹脂、  衚瀺パタ
ヌン、  抌しボタン郚、  スカヌト
郚、  ベヌス郚、  接点。
1 and 2 are cross-sectional views showing the manufacturing process of the push button panel of the present invention. FIG. 3 is a cross-sectional view of a conventional push button panel. 1, 11... Transfer sheet, 2, 12... Base sheet, 3... Contact pattern, 4... Mold, 5...
Fixed type, 6... Movable type, 7... Cavity, 8...
... thermoplastic elastomer resin, 13 ... display pattern, 21 ... push button section, 22 ... skirt section, 23 ... base section, 24 ... contact point.

Claims (1)

【特蚱請求の範囲】  剥離性を有する基䜓シヌト䞊に接点パタヌ
ン又は及び衚瀺パタヌンが圢成された転
写シヌトを射出成型甚金型内に䜍眮合わせし
お固定し、次いで金型をスカヌト郚の厚み
が0.3〜1.5mmの金型タツチの状態ずし、その埌熱
可塑性゚ラストマヌ暹脂を金型のキダビテむ
内に射出し、続いお金型をスカヌト郚の
厚みが0.1〜0.5mmになるたで型締めし、熱可塑性
゚ラストマヌ暹脂の冷华固化を埅぀お金型の
型開きを行い、金型から成型品を取り出しお基
䜓シヌトを剥離するこずを特城ずする抌しボタ
ンパネルの補造方法。  キダビテむ内ぞの熱可塑性゚ラストマヌ暹
脂の流路がサむドゲヌトである請求項蚘茉の
抌しボタンパネルの補造方法。  枚の転写シヌトが抌しボタンパネルの䞡面
に䜍眮するように金型内に固定する請求項蚘
茉の抌しボタンパネルの補造方法。  熱可塑性゚ラストマヌ暹脂が、ポリ゚ステ
ル・ポリアミド・ポリオレフむン・ポリスチレ
ン・ポリりレタン・ポリ塩化ビニル係のうちいず
れかである請求項蚘茉の抌しボタンパネルの補
造方法。  転写シヌトが、離型凊理が斜された基䜓シ
ヌト䞊に、ポリりレタン暹脂たたはポリ゚ステ
ル暹脂をバむンダヌずしたカヌボン導電むンキか
らなる接点パタヌンがスクリヌン印刷法にお圢
成され、その䞊にポリりレタン暹脂・ポリ゚ステ
ル暹脂・ポリプロピレン暹脂・アクリル暹脂のい
ずれかよりなる接着局が圢成されたものである請
求項蚘茉の抌しボタンパネルの補造方法。  金型の固定型が割型であり、キダビテむ
の抌しボタン郚倩面で分割されるように構成され
おいる請求項蚘茉の抌しボタンパネルの補造方
法。
[Scope of Claims] 1. A transfer sheet 1 on which a contact pattern 3 and/or a display pattern 13 are formed on a removable base sheet 2 is aligned and fixed in an injection mold 4, and then molded with metal. The mold 4 is brought into a state in which the thickness of the skirt portion 22 is 0.3 to 1.5 mm, and then the thermoplastic elastomer resin 8 is injected into the cavity 7 of the mold 4, and then the mold 4 is brought into a state where the thickness of the skirt portion 22 is 0.3 to 1.5 mm. The mold is clamped until it becomes 0.1 to 0.5 mm, the mold 4 is opened after waiting for the thermoplastic elastomer resin 8 to cool and solidify, the molded product is taken out from the mold 4, and the base sheet 2 is peeled off. A method for manufacturing a push button panel. 2. The method of manufacturing a push button panel according to claim 1, wherein the flow path for the thermoplastic elastomer resin 8 into the cavity 7 is a side gate. 3. The method of manufacturing a push button panel according to claim 1, wherein the two transfer sheets are fixed in the mold 4 so as to be positioned on both sides of the push button panel. 4. The method for manufacturing a push button panel according to claim 1, wherein the thermoplastic elastomer resin 8 is one of polyester, polyamide, polyolefin, polystyrene, polyurethane, and polyvinyl chloride. 5 A contact pattern 3 made of carbon conductive ink with polyurethane resin or polyester resin as a binder is formed on the base sheet 2 of which the transfer sheet 1 has been subjected to mold release treatment by a screen printing method, and a polyurethane resin - The method for manufacturing a push button panel according to claim 1, wherein an adhesive layer made of one of polyester resin, polypropylene resin, and acrylic resin is formed. 6 The fixed mold of mold 4 is a split mold, and cavity 7
4. The method of manufacturing a push button panel according to claim 3, wherein the push button panel is divided at the top surface of the push button panel.
JP63275165A 1988-10-31 1988-10-31 Manufacture of push-button panel Granted JPH02121815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63275165A JPH02121815A (en) 1988-10-31 1988-10-31 Manufacture of push-button panel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63275165A JPH02121815A (en) 1988-10-31 1988-10-31 Manufacture of push-button panel

Publications (2)

Publication Number Publication Date
JPH02121815A JPH02121815A (en) 1990-05-09
JPH059247B2 true JPH059247B2 (en) 1993-02-04

Family

ID=17551580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63275165A Granted JPH02121815A (en) 1988-10-31 1988-10-31 Manufacture of push-button panel

Country Status (1)

Country Link
JP (1) JPH02121815A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2529609Y2 (en) * 1990-08-31 1997-03-19 束䞋電噚産業株匏䌚瀟 Mold for electronic parts
KR100317076B1 (en) * 1999-04-12 2001-12-22 윀귌수 Pressurized molded material and the molding apparatus using pressure fluid through synthetic resin panel
JP3090037U (en) 2002-05-16 2002-11-22 船井電機株匏䌚瀟 Operation buttons integrated front panel
JP2011011523A (en) * 2009-07-06 2011-01-20 Sony Corp Multicolor molding method, multicolor molding apparatus, and multicolor molded part

Also Published As

Publication number Publication date
JPH02121815A (en) 1990-05-09

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