JPH0453931Y2 - - Google Patents
Info
- Publication number
- JPH0453931Y2 JPH0453931Y2 JP12955788U JP12955788U JPH0453931Y2 JP H0453931 Y2 JPH0453931 Y2 JP H0453931Y2 JP 12955788 U JP12955788 U JP 12955788U JP 12955788 U JP12955788 U JP 12955788U JP H0453931 Y2 JPH0453931 Y2 JP H0453931Y2
- Authority
- JP
- Japan
- Prior art keywords
- flange
- cavity
- mold
- thermal stress
- notch
- 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
- 238000000465 moulding Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008646 thermal stress Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、複雑な形状の合成樹脂製の表皮体を
成形するための、スラツシユ成形型の改良に関
し、該成形体の歪と割れの発生を防止するように
したものである。[Detailed description of the invention] (Industrial field of application) The present invention relates to the improvement of a slush mold for molding a skin body made of synthetic resin with a complex shape. It is designed to prevent this.
（従来の技術）
キヤビテイ部の開口縁にフランジ部を設け、該
フランジ部を保持し、キヤビテイ部を加熱しなが
ら合成樹脂粉末を投射して溶融させ、これを冷却
固化させて離型するようにした成形型は、例えば
実開昭61−10820、同61−85411等に示されてい
る。(Prior art) A flange is provided at the opening edge of the cavity, the flange is held, and synthetic resin powder is projected and melted while heating the cavity, which is then cooled and solidified before being released from the mold. Such molds are shown in, for example, Japanese Utility Model Applications No. 61-10820 and No. 61-85411.
（考案が解決しようとする課題）
前記の成形型は、背面に加熱媒体のジヤケツト
又は配管若しくは赤外線加熱装置等の熱源を備え
ており、加熱と冷却が交互に行なわれるため、熱
応力及び疲労によつて歪や割れが生じることがあ
り、特にジヤケツト式のものは、割れにより加熱
媒体が漏洩するという不都合が併発する。(Problem to be solved by the invention) The above-mentioned mold is equipped with a heat source such as a jacket or piping for a heating medium or an infrared heating device on the back side, and heating and cooling are performed alternately, so there is no problem with thermal stress and fatigue. As a result, distortions and cracks may occur, and especially in the case of a jacket type, the heating medium may leak due to the cracks.
前記熱応力は、比較的剛性の高いフランジに隣
接する部分が高く、歪、割れ等もこの部分に生じ
易い。 The thermal stress is high in the portion adjacent to the flange, which has relatively high rigidity, and distortions, cracks, etc. are likely to occur in this portion.
したがつて、本考案はこれらの問題を解決する
ことを課題とする。 Therefore, the present invention aims to solve these problems.
（課題を解決するための手段）
本考案の前記課題の解決手段は、表皮体を成形
するためのキヤビテイ部と、該キヤビテイ部の開
口縁から外方に拡がるフランジ部が、一体に形成
されているスラツシユ成形用金型において、フラ
ンジ部を形成する各辺の端縁に、応力を緩和する
ための切欠きを少なくとも一個ずつ設けたことを
特徴とする。(Means for Solving the Problems) The means for solving the problems of the present invention is such that a cavity portion for molding the skin body and a flange portion extending outward from the opening edge of the cavity portion are integrally formed. The slush forming die is characterized in that at least one notch for relaxing stress is provided at the edge of each side forming the flange portion.
（作用）
前記の手段により、フランジ部の可撓性は増大
し、キヤビテイ部の開口付近及びフランジ部に生
じる熱応力は緩和されるため、成形型に歪や割れ
が生じない。(Function) By the means described above, the flexibility of the flange portion is increased, and the thermal stress generated near the opening of the cavity portion and the flange portion is alleviated, so that no distortion or cracks occur in the mold.
（実施例）
以下、図面を参照して本考案の実施例を説明す
る。第１図、第２図において１はスラツシユ成形
型で略Ｔ字型となしており、キヤビテイ部２は複
雑な曲面をもつている。この成形型を作業位置に
保持するために、キヤビテイ部２の口縁に続いて
外方へ拡がるフランジ部３が連設され、該フラン
ジ部３は別体のフレーム４の保持溝５によつて保
持される。成形型１の背面には熱源Ｈが設けら
れ、成形時キヤビテイ部２を加熱し、離型時は消
熱される。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, 1 is a slush molding die approximately T-shaped, and the cavity portion 2 has a complicated curved surface. In order to hold this mold in the working position, a flange part 3 that expands outward following the mouth edge of the cavity part 2 is provided, and the flange part 3 is held by a retaining groove 5 of a separate frame 4. Retained. A heat source H is provided on the back side of the mold 1 to heat the cavity portion 2 during molding and dissipate the heat during mold release.
フランジ３は、辺３ａ，３ｂ，３ｃ……等の複
数の辺をもち、各辺に先端に丸味をもつ複数の切
欠き６，６……が設けられて残部に舌辺７，７…
…が形成されている。切欠き６は、フランジ３の
全般にわたつて設けることが好ましいが、熱応力
の分布状態によつては各辺の熱応力の最も集中す
る部分のみに設けることもできる。 The flange 3 has a plurality of sides such as sides 3a, 3b, 3c, etc., each side is provided with a plurality of notches 6, 6,... having a rounded tip, and the remaining portion has tongue sides 7, 7,...
...is formed. The notches 6 are preferably provided throughout the flange 3, but depending on the distribution of thermal stress, the notches 6 may be provided only in the portions of each side where the thermal stress is most concentrated.
スラツシユ成形作業の際の加熱及び冷却によ
り、例えばフランジ３の１辺３ａ及びこれに隣接
する部分には矢印Ａの方向の伸縮とＸ，Ｙ軸まわ
りの矢印Ｂ，Ｃ方向の正負の曲げが生じ、他の辺
についても同様の歪が生じる。そして、キヤビテ
イ部２の口縁部においては外方へ拡がるフランジ
部３が連接されて剛性が大きい上にに、キヤビテ
イ部２とフランジ部３には温度差があるため熱応
力が発生する。 Due to heating and cooling during the slush forming operation, for example, one side 3a of the flange 3 and the adjacent portion thereof undergoes expansion and contraction in the direction of arrow A and positive and negative bending in the directions of arrows B and C around the X and Y axes. , similar distortion occurs on other sides as well. At the mouth edge of the cavity part 2, the outwardly expanding flange part 3 is connected and has high rigidity, and in addition, there is a temperature difference between the cavity part 2 and the flange part 3, so thermal stress is generated.
しかし、本考案においては、フランジ部３に切
欠き６を設けてあるので、フランジ部３の剛性が
低くキヤビテイ部２に対する拘束力も小さいた
め、熱応力が緩和され局部的な歪も生じにくい。
このため、加熱冷却が繰返されても疲労が生じな
いから割れが発生しない。 However, in the present invention, since the notch 6 is provided in the flange portion 3, the rigidity of the flange portion 3 is low and the restraining force on the cavity portion 2 is also small, so thermal stress is relaxed and local distortion is less likely to occur.
Therefore, even if heating and cooling are repeated, fatigue does not occur and cracks do not occur.
（考案の効果）
以上のように、フランジ部に切欠きを設けると
いう簡単な手段で、キヤビテイ部に生じる内部応
力を減少して型寿命を延長することができ歪の発
生こ防止できる、すぐれた効果を奏する。(Effects of the invention) As described above, by providing a notch in the flange, the internal stress generated in the cavity can be reduced, the mold life can be extended, and distortion can be prevented. be effective.
第１図は本考案の実施例の斜面図、第２図は第
１図の−線断面図である。
２……キヤビテイ部、３……フランジ、３ａ，
３ｂ……辺、６……切欠き。
FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 2...Cavity part, 3...Flange, 3a,
3b...side, 6...notch.
Claims (1)
ヤビテイ部の開口縁から外方に拡がるフランジ部
が、一体に形成されているスラツシユ成形用金型
において、フランジ部を形成する各辺の端縁に、
応力を緩和するための切欠きを少なくとも一個ず
つ設けたことを特徴とする、スラツシユ成形型。 In a slush molding die in which a cavity for molding the skin body and a flange extending outward from the opening edge of the cavity are integrally formed, the edges of each side forming the flange are ,
A slush molding die characterized by having at least one notch for relieving stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12955788U JPH0453931Y2 (en) | 1988-10-04 | 1988-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12955788U JPH0453931Y2 (en) | 1988-10-04 | 1988-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0250321U JPH0250321U (en) | 1990-04-09 |
| JPH0453931Y2 true JPH0453931Y2 (en) | 1992-12-18 |
Family
ID=31383945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12955788U Expired JPH0453931Y2 (en) | 1988-10-04 | 1988-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0453931Y2 (en) |
-
1988
- 1988-10-04 JP JP12955788U patent/JPH0453931Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0250321U (en) | 1990-04-09 |
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