JPH0125691B2 - - Google Patents
Info
- Publication number
- JPH0125691B2 JPH0125691B2 JP57186800A JP18680082A JPH0125691B2 JP H0125691 B2 JPH0125691 B2 JP H0125691B2 JP 57186800 A JP57186800 A JP 57186800A JP 18680082 A JP18680082 A JP 18680082A JP H0125691 B2 JPH0125691 B2 JP H0125691B2
- Authority
- JP
- Japan
- Prior art keywords
- glass fiber
- frame member
- glass fibers
- polybutylene terephthalate
- molded product
- 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
Links
- 239000003365 glass fiber Substances 0.000 claims description 30
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 11
- -1 polybutylene terephthalate Polymers 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
Landscapes
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は樹脂シートを貼付したガラス繊維配
合成形品に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a glass fiber compounded molded product to which a resin sheet is attached.
従来から、プリント基板を備えたフラツトタイ
プのキーボードにおいては、そのスイツチの形状
に合致する開口を有する枠部材を嵌め合わせて、
この枠部材の上面に表示シートを貼り付けるよう
にしている。 Conventionally, in a flat type keyboard equipped with a printed circuit board, a frame member having an opening that matches the shape of the switch is fitted.
A display sheet is pasted on the top surface of this frame member.
ところで、この表示シートと枠部材との間に、
線膨脹係数に差があると、表示シートにたわみが
生じたり、表示シートが枠部材からはがれたりす
るために、表示シートの線膨脹係数とその線膨脹
係数が略等しいガラス繊維配合成形品を枠部材と
して使用している。ところが、このガラス繊維配
合成形品は、ガラス繊維が成形時に一方向に配合
されるために、ガラス繊維が配向される方向とこ
れと直交する方向とでは、その線膨脹係数が異な
り、表示シートの線膨脹係数と枠部材の線膨脹係
数とを一致させ難く、表示シートのたわみやはが
れの問題は依然解決されないままであつた。 By the way, between this display sheet and the frame member,
If there is a difference in linear expansion coefficient, the display sheet may bend or the display sheet may peel off from the frame member. It is used as a component. However, in this glass fiber compound molded product, because the glass fibers are mixed in one direction during molding, the coefficient of linear expansion is different between the direction in which the glass fibers are oriented and the direction perpendicular to this direction, making it difficult to display the display sheet. It is difficult to match the linear expansion coefficient with that of the frame member, and the problem of deflection and peeling of the display sheet remains unsolved.
そこで、この発明は、ガラス繊維配合成形品に
貼付した樹脂シートのはがれやたわみの発生を防
止することを目的としている。 Therefore, an object of the present invention is to prevent the occurrence of peeling or bending of a resin sheet attached to a glass fiber-containing molded product.
この目的を達成するために、この発明の構成
を、ガラス繊維が配合されたポリブチレンテレフ
タレートを所定方向から射出して硬化させる第１
工程と、ガラス繊維が配合されたポリブチレンテ
レフタレートを所定方向とは直交する方向から射
出して硬化させる第２工程とにより製造され、ガ
ラス繊維の配向方向が全体として直交するように
されたガラス繊維配合成形品に、ポリエステル製
の樹脂シートを貼付するようにしている。 In order to achieve this object, the structure of the present invention is a first method in which polybutylene terephthalate mixed with glass fiber is injected from a predetermined direction and cured.
and a second step of injecting and curing polybutylene terephthalate blended with glass fibers from a direction perpendicular to a predetermined direction, so that the orientation direction of the glass fibers is orthogonal as a whole. A polyester resin sheet is attached to the compound molded product.
以下にこの発明を図面に基づいて説明する。 The present invention will be explained below based on the drawings.
第１図は、フラツトタイプのキーボードの分解
斜視図を示すもので、１はプリント基板、２はス
イツチ部材、３はガラス繊維配合成形品としての
枠部材、４はその開口、５は表示シート、６はそ
のキー部で、表示シート５にはポリエステルシー
トが使用されており、その線膨脹係数は、２×
10-51／℃である。枠部材３としては、ガラス繊
維が配合されたポリブチレンテレフタレート
PBTがその成形材として使用されている。この
ポリブチレンテレフタレートは、ガラス繊維の配
向方向によつてその線膨脹係数が異なつており、
ガラス繊維の配向方向の線膨脹係数、すなわち、
ガラス繊維が延びる方向の線膨脹係数は、略２×
10-51／℃であり、ガラス繊維が延びる方向と直
交する方向の線膨脹係数は、略８×10-51／℃で
ある。そのため、枠部材３は以下に述べるような
方法で製造される。すなわち、第２図に示すよう
に、まず、矢印Ａ方向からガラス繊維が配合され
たポリブチレンテレフタレートを射出して硬化さ
せ、枠部材３のうちその半分を製作する（第１工
程）。その後に、矢印Ｂ方向からガラス繊維が配
合されたポリブチレンテレフタレートを射出して
硬化させ、枠部材３のうち残りの半分を製作する
（第２工程）。この方法によれば、ゲート口が小さ
いために、射出の際、ガラス繊維が射出方向に沿
つて配向するので、射出方向を直交させて成形を
行なうことにより、ガラス繊維が全体として直交
するように配向させることができる。このように
して製造された枠部材３は、スイツチ部材２が取
り付けられたプリント基板１に嵌め合わされると
ともに、その上面には表示シート５が貼付され
る。 Fig. 1 shows an exploded perspective view of a flat type keyboard, in which 1 is a printed circuit board, 2 is a switch member, 3 is a frame member as a glass fiber compound molded product, 4 is an opening thereof, 5 is a display sheet, 6 is the key part, a polyester sheet is used for the display sheet 5, and its linear expansion coefficient is 2×
10 -5 1/℃. The frame member 3 is made of polybutylene terephthalate mixed with glass fiber.
PBT is used as the molding material. This polybutylene terephthalate has a linear expansion coefficient that differs depending on the orientation direction of the glass fibers.
The coefficient of linear expansion in the orientation direction of glass fibers, i.e.
The coefficient of linear expansion in the direction in which the glass fiber extends is approximately 2×
10 -5 1/°C, and the linear expansion coefficient in the direction perpendicular to the extending direction of the glass fibers is approximately 8×10 -5 1/°C. Therefore, the frame member 3 is manufactured by the method described below. That is, as shown in FIG. 2, first, polybutylene terephthalate mixed with glass fibers is injected from the direction of arrow A and cured to manufacture half of the frame member 3 (first step). Thereafter, polybutylene terephthalate mixed with glass fiber is injected from the direction of arrow B and cured to manufacture the remaining half of the frame member 3 (second step). According to this method, since the gate opening is small, the glass fibers are oriented along the injection direction during injection, so by performing molding with the injection direction orthogonal, the glass fibers are oriented perpendicularly as a whole. It can be oriented. The frame member 3 manufactured in this way is fitted onto the printed circuit board 1 to which the switch member 2 is attached, and the display sheet 5 is attached to the upper surface thereof.
枠部材３は直交する２方向の線膨脹係数がガラ
ス繊維に支配され、その結果いずれの方向の線膨
脹係数も略２×10-51／℃となり、ポリエステル
の線膨脹係数に略等しくなるため、貼付された表
示シートがたわんだりはがれたりすることがな
い。 The linear expansion coefficient of the frame member 3 in two orthogonal directions is dominated by the glass fibers, and as a result, the linear expansion coefficient in either direction is approximately 2×10 -5 1/°C, which is approximately equal to the linear expansion coefficient of polyester. , the attached display sheet will not bend or peel off.
また、この実施例のように枠部材３が開口４を
有している場合は、第１工程で製作された部分と
第２工程で製作された部分との間の膨脹率の差異
により生じる内部応力が緩和されるので好都合で
ある。 In addition, when the frame member 3 has the opening 4 as in this embodiment, the inner part caused by the difference in expansion rate between the part manufactured in the first process and the part manufactured in the second process. This is advantageous because stress is relieved.
なお、枠部材３のガラス繊維含有量は成形性や
金型の寿命等の関係から重量百分率で15％程度ま
でが望ましい。 Note that the glass fiber content of the frame member 3 is desirably up to about 15% by weight in view of moldability, mold life, etc.
また、表示シートはポリエステル製であるた
め、インクとの接着性がよく、鮮明な印刷を行な
うこともできる。 Furthermore, since the display sheet is made of polyester, it has good adhesion with ink and can print clearly.
以上、説明したように、この発明によれば、そ
の構成を、ガラス繊維が配合されたポリブチレン
テレフタレートを所定方向から射出して硬化させ
る第１工程と、ガラス繊維が配合されたポリブチ
レンテレフタレートを所定方向とは直交する方向
から射出して硬化させる第２工程とにより製造さ
れ、ガラス繊維の配向方向が全体として直交する
ようにされたガラス繊維配合成形品に、ポリエス
テル製の樹脂シートを貼付するようにしたため、
膨脹率の差異により樹脂シートがたわんだりはが
れたりすることがないという効果を奏する。 As explained above, according to the present invention, the structure includes a first step of injecting polybutylene terephthalate blended with glass fibers from a predetermined direction and curing the polybutylene terephthalate blended with glass fibers. A polyester resin sheet is attached to a glass fiber compounded molded product manufactured by a second step of injecting and curing from a direction perpendicular to the predetermined direction, and the orientation direction of the glass fibers is orthogonal as a whole. Because I did it like this,
This has the effect that the resin sheet does not bend or peel off due to differences in expansion rates.
第１図および第２図はこの発明の一実施例を示
す図であつて、第１図はフラツトタイプのキーボ
ードに適用した事例を示す斜視図、第２図は枠部
材の製造方法を示す斜視図である。
１……プリント基板、３……枠部材（ガラス繊
維配合成形品）、５……表示シート（樹脂シー
ト）。
1 and 2 are views showing one embodiment of the present invention, in which FIG. 1 is a perspective view showing an example of application to a flat type keyboard, and FIG. 2 is a perspective view showing a method of manufacturing a frame member. It is. 1... Printed circuit board, 3... Frame member (glass fiber compound molded product), 5... Display sheet (resin sheet).
Claims (1)
タレートを所定方向から射出して硬化させる第１
工程と、前記ガラス繊維が配合されたポリブチレ
ンテレフタレートを所定方向とは直交する方向か
ら射出して硬化させる第２工程とにより製造さ
れ、前記ガラス繊維の配向方向が全体として直交
するようにされたガラス繊維配合成形品に、ポリ
エステル製の樹脂シートを貼付したことを特徴と
する樹脂シートを貼付したガラス繊維配合成形
品。1 A first step in which polybutylene terephthalate mixed with glass fiber is injected from a predetermined direction and cured.
and a second step of injecting and curing polybutylene terephthalate blended with the glass fibers from a direction perpendicular to the predetermined direction, so that the orientation directions of the glass fibers are generally perpendicular to each other. A glass fiber compound molded product with a resin sheet attached, characterized in that a polyester resin sheet is attached to a glass fiber compound molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186800A JPS5976241A (en) | 1982-10-26 | 1982-10-26 | Glass fiber compounded shape on which resin sheet is pasted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186800A JPS5976241A (en) | 1982-10-26 | 1982-10-26 | Glass fiber compounded shape on which resin sheet is pasted |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5976241A JPS5976241A (en) | 1984-05-01 |
| JPH0125691B2 true JPH0125691B2 (en) | 1989-05-18 |
Family
ID=16194800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57186800A Granted JPS5976241A (en) | 1982-10-26 | 1982-10-26 | Glass fiber compounded shape on which resin sheet is pasted |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5976241A (en) |
-
1982
- 1982-10-26 JP JP57186800A patent/JPS5976241A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5976241A (en) | 1984-05-01 |
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