JPH028231Y2 - - Google Patents
Info
- Publication number
- JPH028231Y2 JPH028231Y2 JP3639584U JP3639584U JPH028231Y2 JP H028231 Y2 JPH028231 Y2 JP H028231Y2 JP 3639584 U JP3639584 U JP 3639584U JP 3639584 U JP3639584 U JP 3639584U JP H028231 Y2 JPH028231 Y2 JP H028231Y2
- Authority
- JP
- Japan
- Prior art keywords
- gate
- date
- plastic
- display board
- resin injection
- 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
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、日付、曜日、等を表示するプラスチ
ツク製の時計用表示板の改良に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a plastic watch display plate that displays the date, day of the week, etc.
近年プラスチツク成形技術の進歩に伴い、時計
用表示板の様な薄板形状も容易に成形加工が可能
となつたため、低コストなプラスチツク製の時計
用表示板が、広く用いられるようになつて来た。
しかしプラスチツク製表示板の採用にあたつての
残された問題として、樹脂注入用のゲート部の処
理と、溶かされたプラスチツクが固るときの収縮
差により起るソリ、の二つが残つている。
In recent years, with the advancement of plastic molding technology, it has become possible to easily mold thin plates such as watch display boards, so low-cost plastic watch display boards have become widely used. .
However, there are two remaining problems when adopting plastic display boards: processing of the gate for resin injection, and warping caused by the difference in shrinkage when the melted plastic hardens. .
次に従来技術を図面を用いて説明する。 Next, the prior art will be explained using drawings.
第１図、第２図は従来例に基づくプラスチツク
製日付表示板（以下日板と称す）の上面図と下面
図であり、第３図はその断面図である。 1 and 2 are a top view and a bottom view of a conventional plastic date display plate (hereinafter referred to as a date plate), and FIG. 3 is a sectional view thereof.
日板１には、内周部に日板送り用の送り歯２
が、本体と一体にプラスチツク成形で構成されて
いる。更に日板１の上面外側の表示面には１〜31
までの日表示文字が印刷されている。又下面側に
は、樹脂注入用のゲート３が１箇所又は複数箇所
設けられている。前記ゲート３は第３図に示すよ
うに、ゲート切断等の二次加工を廃止するため周
辺部より沈んだ形状に形成しゲートの残り高さの
バラツキを吸収する構造となつている。 The date plate 1 has a feed tooth 2 on the inner periphery for feeding the date plate.
However, it is made of plastic molded integrally with the main body. Furthermore, 1 to 31 are displayed on the outer display surface of the top of the date plate 1.
The day display characters up to are printed. Furthermore, one or more gates 3 for resin injection are provided on the lower surface side. As shown in FIG. 3, the gate 3 is formed in a shape that is sunken from the periphery in order to eliminate secondary processing such as gate cutting, and has a structure that absorbs variations in the remaining height of the gate.
上記のような従来例においては、ゲートの残り
高さのバラツキを吸収すべく、ゲート３部が周辺
部より充分に深く沈んでおり、このためゲート３
周辺部の肉厚t2を、他の日付印刷部の肉厚t1や日
板送り用の送り歯２部の肉厚t3よりも、非常に厚
くする必要があつた。このようなことにより、日
付表示部肉厚t1、ゲート部周辺肉厚t2、日送り歯
部肉厚t3の各厚さが大きく異り、成形時の溶けた
プラスチツクが固るとき収縮の時間的な差を生
じ、それが日板１全体のソリ等の変形を生じてし
まう原因となつていた。 In the conventional example described above, the third part of the gate is sunk sufficiently deeper than the peripheral part in order to absorb variations in the remaining height of the gate.
It was necessary to make the wall thickness t2 of the peripheral part much thicker than the wall thickness t1 of the other date printing part and the wall thickness t3 of the two feed teeth for feeding the date plate. As a result, the thickness of the date display part t 1 , the thickness around the gate part t 2 , and the thickness of the date feed tooth part t 3 vary greatly, and the melted plastic during molding shrinks when it hardens. This causes a time difference, which causes deformation of the entire date plate 1, such as warpage.
本考案は上記欠点を解消するための樹脂注入用
のゲート部形状を提供することを目的とするもの
である。
The object of the present invention is to provide a gate shape for resin injection to eliminate the above-mentioned drawbacks.
以下、本考案の一実施例を図面を用いて詳細に
説明する。
Hereinafter, one embodiment of the present invention will be described in detail using the drawings.
第４図、第５図は本考案によるところの日板の
下面図と断面図である。上面図は従来例と同一の
ため省略する。日板送り用の送り歯２と、日表示
文字部は従来例と同じであるが、１箇所又は複数
箇所設けられた樹脂注入用ゲート３の周辺部は、
突起状の枠部３ａを除き他は全て一段低く形成さ
れている。そして枠部３ａの内部を枠部３ａより
一段低くしてその部分に樹脂注入用のゲート３を
設ける。前記枠部３ａの高さはゲート部でちぎれ
た樹脂の頭がかくれる程度の高さにしておく。こ
のような断面形状を形成することにより、日付表
示部肉厚t1、ゲート部周辺肉厚t2、日送り歯部肉
厚t3をほぼ均等の厚さにそろえることができる。
ゲート３の周辺部の突起状の枠部３ａを除き全体
に肉厚を均等にしたことにより、成形時の溶けた
プラスチツクが固るときも収縮差を生じず、ソリ
の発生も非常に小さくおさえることができる。 FIGS. 4 and 5 are a bottom view and a sectional view of the sun plate according to the present invention. The top view is omitted because it is the same as the conventional example. The feed dog 2 for feeding the date plate and the date display character part are the same as in the conventional example, but the peripheral part of the resin injection gate 3 provided at one or more places is as follows.
Except for the protruding frame portion 3a, everything else is formed one step lower. Then, the inside of the frame portion 3a is made one step lower than the frame portion 3a, and a gate 3 for resin injection is provided in that portion. The height of the frame portion 3a is set to such a level that the head of the resin torn off at the gate portion is hidden. By forming such a cross-sectional shape, the date display portion wall thickness t 1 , the gate portion periphery wall thickness t 2 , and the date feed tooth portion wall thickness t 3 can be made approximately equal.
By making the wall thickness uniform throughout except for the protruding frame part 3a around the gate 3, there is no difference in shrinkage when the melted plastic hardens during molding, and the occurrence of warping is kept to a very low level. be able to.
〔考案の効果〕
以上のように本考案は、樹脂注入用ゲートの周
辺部を突起状に一段高くする形状を採用すること
により、プラスチツク製時計用表示板に残された
ゲート処理と、ソリの二つの問題を容易に解消し
うるものである。[Effects of the invention] As described above, the present invention eliminates the gate treatment left on the plastic watch display board and the warpage by adopting a shape in which the peripheral part of the resin injection gate is raised in a protruding manner. This can easily solve two problems.
第１図、第２図、第３図は従来のプラスチツク
製時計用表示板を表わし、第１図は上面図、第２
図は下面図、第３図は断面図であり、第４図、第
５図は本考案の一実施例によるプラスチツク製時
計用表示板の下面図と断面図である。
１……日板、２……日板送り用送り歯、３……
樹脂注入用ゲート、３ａ……突起状の枠部。
Figures 1, 2, and 3 show conventional plastic watch display boards, with Figure 1 being a top view and Figure 2 being a top view.
3 is a bottom view, FIG. 3 is a sectional view, and FIGS. 4 and 5 are a bottom view and a sectional view of a plastic watch display plate according to an embodiment of the present invention. 1... Date plate, 2... Feed dog for feeding the date plate, 3...
Resin injection gate, 3a... protruding frame portion.
Claims (1)
板の板厚を略均一と成し、前記表示板の下面に設
けられた樹脂注入用のゲートの周辺部に突起状の
枠部を設けたことを特徴とする時計用表示板。 In a plastic watch display board, the display board has a substantially uniform thickness, and a protruding frame portion is provided around a gate for resin injection provided on the bottom surface of the display board. A clock display board featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3639584U JPS60148978U (en) | 1984-03-14 | 1984-03-14 | Clock display board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3639584U JPS60148978U (en) | 1984-03-14 | 1984-03-14 | Clock display board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60148978U JPS60148978U (en) | 1985-10-03 |
| JPH028231Y2 true JPH028231Y2 (en) | 1990-02-27 |
Family
ID=30541533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3639584U Granted JPS60148978U (en) | 1984-03-14 | 1984-03-14 | Clock display board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60148978U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010217163A (en) * | 2009-02-23 | 2010-09-30 | Morioka Seiko Instruments Inc | Watch with resin-made day wheel, die for day wheel and calendar |
| JP2010197078A (en) * | 2009-02-23 | 2010-09-09 | Morioka Seiko Instruments Inc | Plastic date indicator, mold for date indicator, and plastic date indicator manufacturing method |
-
1984
- 1984-03-14 JP JP3639584U patent/JPS60148978U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60148978U (en) | 1985-10-03 |
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