JPS5976229A - Manufacture of formed body compounded with glass fiber - Google Patents
Manufacture of formed body compounded with glass fiberInfo
- Publication number
- JPS5976229A JPS5976229A JP57186799A JP18679982A JPS5976229A JP S5976229 A JPS5976229 A JP S5976229A JP 57186799 A JP57186799 A JP 57186799A JP 18679982 A JP18679982 A JP 18679982A JP S5976229 A JPS5976229 A JP S5976229A
- Authority
- JP
- Japan
- Prior art keywords
- glass fibers
- manufacture
- compounded
- frame member
- along
- 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
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
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
Abstract
Description
【発明の詳細な説明】 この発明はガラス繊維配合成形品の製造方法に関する。[Detailed description of the invention] The present invention relates to a method for manufacturing glass fiber compound molded articles.
従来から、プリント基板を備えたフラットタイプのキー
ボードにおいては、そのスイッ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, and a display sheet is pasted on the upper surface of this frame member.
ところで、この表示シートと枠部材との間に、線膨張係
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
の線膨張係数とその線膨張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
カラス繊維配合成形品は、ガラス繊維が成形時に一方向
に配向されるために、カ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、その線膨張係数が異なり、表
示シー１−の線膨張係数と枠部材の線膨張係数とを一致
させ難いという問題をはらんでいる。By the way, if there is a difference in the coefficient of linear expansion between the display sheet and the frame member, the display sheet may bend or the display sheet may peel off from the frame member. A glass fiber compounded molded product with approximately the same coefficient of linear expansion is used as the frame member. However, because the glass fibers of this glass fiber-containing molded product are oriented 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. There is a problem in that it is difficult to match the linear expansion coefficient of - with the linear expansion coefficient of the frame member.
そこで、この発明は、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、その線膨張係数に（セ力差か生
しないようにしたガラス繊維配合成形品の製造方法を提
供することを目的とする。Therefore, it is an object of the present invention to provide a method for manufacturing a glass fiber compounded molded product that does not cause a difference in linear expansion coefficient between the direction in which the glass fibers are oriented and the direction perpendicular thereto. purpose.
この発明は、ガラス繊維が成形時の射出方向に沿って配
向されることに着目してなされたもので、この発明の構
成は、ガラス繊維が配合された成形材を所定方向から射
出して硬化させる第１工程と、カラス繊維か配合された
成形材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工程とからなるもので、ガラス繊維の配向方向
が全体として直交するようにしたガラス繊維配合成形品
の製造方法である。This invention was made by focusing on the fact that glass fibers are oriented along the injection direction during molding. The process consists of a first step in which the molding material containing glass fibers is injected from a direction perpendicular to the predetermined direction and hardened, so that the orientation direction of the glass fibers is orthogonal as a whole. This is a method for manufacturing glass fiber compound molded products.
以下に本発明に係るガラス繊維配合成形品の製造方法を
図面を参照しつつ説明する。The method for manufacturing a glass fiber compound molded article according to the present invention will be explained below with reference to the drawings.
第１図は、フラットタイプのキーボードの分解斜視図を
示すもので、■はプリント基板、２はスイッチ部材、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はそのキ一部で、表示シート５に
はポリエステルシートか使用されており、その線膨張係
数は、２Ｘ１０−” １／°Ｃ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チレフタレ−
ｌ−ＰＵＴか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
よってその線膨張係数が異なっており、カラス繊維の配
向方向の線膨張係数、すなわち、ガラス繊維が延びる方
向の線膨張係数は、略２Ｘ１０−５１／°Ｃであり、ガ
ラス繊維が延びる方向と直交する方向の線膨張係数は、
略Ｆ３ Ｘ １０−’ １ ／°Ｃ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、ます、矢印Ａ方向がらガ
ラス繊卸６が配合されたポリブチレンチレフタレ−１へ
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方向からカラス繊維
か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、ゲート口か小さいために、射
出の際、ガラスδ裁維が射出方向に沿って配向するので
、射出方向を直交させて成形を行なうことにより、ガラ
ス繊維か全体として直交するように配向させることがで
きる。Figure 1 shows an exploded perspective view of a flat type keyboard, where ■ is a printed circuit board, 2 is a switch member, and 3 is an exploded perspective view of a flat type keyboard.
4 is a frame member as a glass fiber compound molded product, 4 is its opening, 5 is a display sheet, and 6 is a part of the frame. The display sheet 5 is made of a polyester sheet, and its linear expansion coefficient is 2X10- " 1/°C.The frame member 3 is made of polybutylene lenticulate resin mixed with glass fiber.
It is used as l-PUT or its molding material. The linear expansion coefficient of this polybutylene terephthalate differs depending on the orientation direction of the glass fibers. C, and the coefficient of linear expansion in the direction perpendicular to the direction in which the glass fibers extend is approximately F3 x 10-' 1 /°C. Therefore, the frame member 3 is manufactured by the method described below. That is, as shown in FIG. 2, in the direction of the arrow A, the glass fiber 6 is injected into the polybutylene lenticule 1 mixed with it and cured, thereby manufacturing half of the frame member 3. 1st 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, because the gate opening is small, the glass δ fibers are oriented along the injection direction during injection. It can be oriented like this.
この発明は以上説明したように、ガラス繊維が配合され
た成形材を所定方向から射出して硬化させる第１工程と
、カラス繊維が配合された成形材と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工程とからなり、カ
ラス繊維の配向方向が全体として直交するようにしたガ
ラス繊維配合成形品の製造方法であるから、ガラス繊維
の配向方向にかかわらずこのガラス繊維配合成形品の線
膨張係数を極方向等とすることができ、このガラス繊維
配合成形品に表示シートを貼り付は用として使用する場
合には、表示シートのしわ、たわみを低減できるという
効果を奏する。As explained above, this invention includes a first step of injecting a molding material containing glass fibers from a predetermined direction and curing it, and a first step of injecting a molding material containing glass fibers from a direction perpendicular to the predetermined direction. This method consists of a second step of curing the glass fiber compound molded product, and the orientation direction of the glass fibers is perpendicular to each other as a whole. The coefficient of linear expansion can be set in the polar direction, and when a display sheet is attached to this glass fiber compound molded product, it is possible to reduce wrinkles and deflection of the display sheet.
第１図はこの発明をフラッ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図はこの発明の製造方法の
一例を示す斜視図である。
１・・・プリン１へ基板、
３・・枠部材（カラス繊維配合成形品）、５・・・表示
シート。
第１図FIG. 1 is a perspective view showing an example in which the invention is applied to a flat type keyboard, and FIG. 2 is a perspective view showing an example of the manufacturing method of the invention. 1... Substrate to pudding 1, 3... Frame member (glass fiber compounded molded product), 5... Display sheet. Figure 1
Claims (1)
硬化させる第１工程と、 前記カラス繊維が配合された成形材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工程とからなり前
記ガラス繊維の配向方向か全体として直交するようにし
たことを特徴とするガラス繊維配合成形品の製造方法。[Claims] A first step of injecting a molding material containing glass fibers from a predetermined direction and curing it; and curing the molding material containing glass fibers by injecting it from a direction perpendicular to the predetermined direction. A method for manufacturing a glass fiber compound molded article, characterized in that the orientation direction of the glass fibers is orthogonal to each other as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186799A JPS5976229A (en) | 1982-10-26 | 1982-10-26 | Manufacture of formed body compounded with glass fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186799A JPS5976229A (en) | 1982-10-26 | 1982-10-26 | Manufacture of formed body compounded with glass fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5976229A true JPS5976229A (en) | 1984-05-01 |
Family
ID=16194782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57186799A Pending JPS5976229A (en) | 1982-10-26 | 1982-10-26 | Manufacture of formed body compounded with glass fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5976229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009051033A (en) * | 2007-08-24 | 2009-03-12 | Aisin Chem Co Ltd | Thick resin product and its manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114969A (en) * | 1974-07-26 | 1976-02-05 | Fuji Heavy Ind Ltd |
-
1982
- 1982-10-26 JP JP57186799A patent/JPS5976229A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114969A (en) * | 1974-07-26 | 1976-02-05 | Fuji Heavy Ind Ltd |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009051033A (en) * | 2007-08-24 | 2009-03-12 | Aisin Chem Co Ltd | Thick resin product and its manufacturing method |
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