JPH0226654Y2 - - Google Patents
Info
- Publication number
- JPH0226654Y2 JPH0226654Y2 JP11850383U JP11850383U JPH0226654Y2 JP H0226654 Y2 JPH0226654 Y2 JP H0226654Y2 JP 11850383 U JP11850383 U JP 11850383U JP 11850383 U JP11850383 U JP 11850383U JP H0226654 Y2 JPH0226654 Y2 JP H0226654Y2
- Authority
- JP
- Japan
- Prior art keywords
- plastic
- molded part
- shrinkage rate
- center
- plastic molded
- 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
- 239000004033 plastic Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 3
- 239000012778 molding material Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000002989 correction material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
Landscapes
- Gears, Cams (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
この考案はプラスチツク製成形部品に関するも
のである。[Detailed description of the invention] This invention relates to a plastic molded part.
従来、プラスチツク製部品は広く使われている
が、高精度を要求されるものにおいてはプラスチ
ツク材の収縮率が問題となつている。すなわち一
般に成形品においては、溶融状態の成形材料を注
入した際、その流れ方向が、流れに対して直角方
向かで収縮率が異なるからである。 Conventionally, plastic parts have been widely used, but the shrinkage rate of plastic materials has become a problem in products that require high precision. That is, in general, in a molded product, when a molten molding material is injected, the shrinkage rate differs depending on whether the flow direction is perpendicular to the flow.
この考案は、このような収縮率の差異にもとづ
く部品形状の歪みを補整した精密部品を提供する
ものである。 This invention provides a precision part that compensates for the distortion of the part shape due to such a difference in shrinkage rate.
つぎにこの考案の実施例について説明する。 Next, an example of this invention will be described.
図面において本考案のプラスチツク製精密部品
１は歯車でありその外周部２はナイロンまたはポ
リアセタール等のプラスチツク材料にて形成され
ている。部品１の中心部には楕円形の補整材３が
設けられている。この補整材３はガラス繊維入り
プラスチツクなどの膨張係数の小さいものよりな
るもので、インサート方式で部品１の成形時に入
れてもよいし、さらには２色成形で形成してもよ
い。いま部品１のゲート部４，５が左右位置にあ
ると、部品１の外周部２においては、成形材料の
収縮率は両ゲート部を結ぶ方向よりも、それに直
交する方向の方が大きい。したがつて楕円形の補
整材３を入れることによつて、この収縮率の差異
にもとづく歯車の歪みを是正しているのである。
楕円形の補整材３の長径と短径の寸法を適当に計
算することにより、歯車の歪みをなくすことがで
きる。 In the drawings, a plastic precision part 1 of the present invention is a gear, and its outer peripheral part 2 is made of a plastic material such as nylon or polyacetal. An elliptical correction member 3 is provided in the center of the component 1. This compensating material 3 is made of a material with a small expansion coefficient, such as glass fiber-containing plastic, and may be inserted in the molding of the component 1 using an insert method, or may be formed by two-color molding. If the gate parts 4 and 5 of the part 1 are now in the left and right positions, the shrinkage rate of the molding material in the outer peripheral part 2 of the part 1 is greater in the direction perpendicular thereto than in the direction connecting both gate parts. Therefore, by inserting the elliptical correction material 3, the distortion of the gear due to this difference in shrinkage rate is corrected.
By appropriately calculating the length and breadth of the elliptical correction member 3, distortion of the gear can be eliminated.
上述の実施例は歯車について説明しているが、
その他、高精度を要するプラスチツク製部品につ
いて実施することができることはいうまでもな
い。 Although the above embodiment describes gears,
It goes without saying that the present invention can also be applied to other plastic parts that require high precision.
上述の構成よりなる本考案によれば、溶融状態
の成形材料の流れの方向に起因する成形材料の収
縮率の差を補整できるので高精度のプラスチツク
製部品を得ることができる。 According to the present invention constructed as described above, it is possible to compensate for the difference in the shrinkage rate of the molding material due to the direction of flow of the molten molding material, so that highly accurate plastic parts can be obtained.
図面は本考案の実施例の平面図である。
１……プラスチツク整成形部品、３……補整
材。
The drawing is a plan view of an embodiment of the present invention. 1... Plastic trimmed parts, 3... Compensation material.
Claims (1)
補整する補整材を設けたことを特徴とするプラ
スチツク製成形部品。 (2) 上記補整材はインサート式で成形部品の中央
部に設けられることを特徴とする実用新案登録
請求の範囲第１項のプラスチツク製成形部品。 (3) 上記補整材は二色成形にて設けられることを
特徴とする実用新案登録請求の範囲第１項のプ
ラスチツク製成形部品。[Scope of Claim for Utility Model Registration] (1) A plastic molded part characterized in that a compensating material is provided in the center to compensate for differences in shrinkage rates of plastic materials. (2) The plastic molded part according to claim 1, wherein the compensation material is an insert type and is provided in the center of the molded part. (3) The plastic molded part according to claim 1, wherein the compensation material is provided by two-color molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11850383U JPS6026814U (en) | 1983-07-29 | 1983-07-29 | plastic molded parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11850383U JPS6026814U (en) | 1983-07-29 | 1983-07-29 | plastic molded parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6026814U JPS6026814U (en) | 1985-02-23 |
| JPH0226654Y2 true JPH0226654Y2 (en) | 1990-07-19 |
Family
ID=30272345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11850383U Granted JPS6026814U (en) | 1983-07-29 | 1983-07-29 | plastic molded parts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6026814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717477A (en) * | 2012-06-28 | 2012-10-10 | 金发科技股份有限公司 | Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert |
-
1983
- 1983-07-29 JP JP11850383U patent/JPS6026814U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102717477A (en) * | 2012-06-28 | 2012-10-10 | 金发科技股份有限公司 | Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert |
| CN102717477B (en) * | 2012-06-28 | 2015-06-03 | 金发科技股份有限公司 | Forming process for combining polylaurolactam (PA) 6/PA6T alloy and metal insert |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6026814U (en) | 1985-02-23 |
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