JPS6234534B2 - - Google Patents
Info
- Publication number
- JPS6234534B2 JPS6234534B2 JP19873283A JP19873283A JPS6234534B2 JP S6234534 B2 JPS6234534 B2 JP S6234534B2 JP 19873283 A JP19873283 A JP 19873283A JP 19873283 A JP19873283 A JP 19873283A JP S6234534 B2 JPS6234534 B2 JP S6234534B2
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- blow molding
- negative pressure
- blown
- pressurized air
- 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
- 238000000034 method Methods 0.000 claims description 8
- 238000000071 blow moulding Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 239000000057 synthetic resin Substances 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000007779 soft material Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/703—Bellows
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明はベローズの中空成形方法に関するもの
で、特に伸縮時に異音を発生しないベローズを成
形する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for hollow molding a bellows, and more particularly to a method for molding a bellows that does not generate abnormal noises during expansion and contraction.
従来、特に負圧を利用したアクチユエーターと
して、軟質樹脂、合成ゴム等復元性を有する軟質
材を蛇腹状に中空成形したベローズが多用されて
いる。 BACKGROUND ART Conventionally, bellows, which are hollow-molded into a bellows shape from a resilient material such as soft resin or synthetic rubber, have been widely used as actuators that utilize negative pressure.
この種のベローズ１には通常、軸線方向に沿つ
て、環状山部２、環状谷部３が交互に形成されて
いる。第１図はベローズ１に負圧がかけられてい
ない状態を示すもので、第２図は、真空ポンプ
（図示せず）により、このベローズ１に負圧がか
けられた状態を示しており、上記環状山部２を構
成する隣接内壁面４，５が圧接状態となつてい
る。負圧が解除されればベローズ１は材料の復元
作用により、第１図に示す状態まで伸長するが、
このとき隣接内壁面４，５同士が離れるさい異音
発生という問題が生じていた。この異音発生を防
ぐために、例えば上記環状山部２の隣接内壁面
４，５同士が圧接しないように設計すればよいも
のであるが、ベローズ１の材質が復元性を有する
軟質材であることが必須条件であるので隣接内壁
面４，５が圧接することは止むを得ず、異音発生
は避けられない欠点がある。 This type of bellows 1 usually has annular peaks 2 and annular valleys 3 alternately formed along the axial direction. Fig. 1 shows a state in which no negative pressure is applied to the bellows 1, and Fig. 2 shows a state in which a negative pressure is applied to the bellows 1 by a vacuum pump (not shown). Adjacent inner wall surfaces 4 and 5 constituting the annular mountain portion 2 are in pressure contact. When the negative pressure is released, the bellows 1 will expand to the state shown in Fig. 1 due to the restoring action of the material.
At this time, a problem occurred in that abnormal noise was generated when the adjacent inner wall surfaces 4 and 5 were separated from each other. In order to prevent the occurrence of this abnormal noise, it is sufficient to design the bellows 1 so that the adjacent inner wall surfaces 4 and 5 of the annular peak 2 do not come into pressure contact with each other, but the material of the bellows 1 must be a soft material with resilience. Since this is an essential condition, it is unavoidable that the adjacent inner wall surfaces 4 and 5 come into pressure contact with each other, which has the disadvantage that the generation of abnormal noise is unavoidable.
本発明は、上述の事情に鑑みてなされたもの
で、ベローズ伸縮時の異音発生を確実に防止でき
ると共に、簡単かつ容易に成形できる方法を提供
することを目的とし、軟質合成樹脂からなる蛇腹
状成形体をブロー成形により製造するにあたり、
型閉されたパリソン内部にエアーを吹込む際付着
防止用パウダーを同時に吹込むことを特徴とする
ものである。 The present invention has been made in view of the above-mentioned circumstances, and aims to provide a method that can reliably prevent the generation of abnormal noise when the bellows is expanded and contracted, as well as a simple and easy molding method for bellows made of soft synthetic resin. In producing a shaped body by blow molding,
The feature is that when air is blown into the inside of the closed parison, adhesion prevention powder is blown at the same time.
次に、本発明によるベローズの中空成形方法の
一実施例について、第３図を基にして説明する。
先ず、型開きした金型６，６間にベローズ１の素
材である軟質材の有底パリソンが垂下される（図
示せず）。そして、第３図に示すように、金型
６，６が型閉し、加圧空気供給用コンプレツサー
７からのエアーが加圧空気供給管８を通してキヤ
ピテイー９内に吹き込まれ、パリソンか金型６の
内壁面に圧着される。このエアー吹込みと同時
に、付着防止用のパウダー１０が散布され、ベロ
ーズ１の内壁面に均一に付着する。したがつて、
負圧をかけても、従来のように隣接内壁面４，５
が直接圧接状態にならない。尚、第３図中符号１
１は前記パウダー１０用のホツパーであり、加圧
空気供給用コンプレツサー７と加圧空気供給管８
との間に設けられている。 Next, an embodiment of the method for blow molding a bellows according to the present invention will be described with reference to FIG.
First, a bottomed parison made of a soft material, which is the material of the bellows 1, is suspended between the opened molds 6 (not shown). Then, as shown in FIG. 3, the molds 6, 6 are closed, and the air from the pressurized air supply compressor 7 is blown into the capsule 9 through the pressurized air supply pipe 8. is crimped onto the inner wall surface of the Simultaneously with this air blowing, adhesion prevention powder 10 is scattered and adheres uniformly to the inner wall surface of the bellows 1. Therefore,
Even if negative pressure is applied, the adjacent inner wall surfaces 4 and 5 are
is not directly pressed. In addition, the code 1 in Figure 3
1 is a hopper for the powder 10, which includes a compressor 7 for supplying pressurized air and a pressurized air supply pipe 8.
is established between.
以上詳述したように、本発明によるベローズの
中空成形方法は、ベローズの中空成形時に付着防
止用のパウダーを散布し、ベローズ内壁面に均一
に付着させて、ベローズ伸縮時の異音発生を確実
に防止することができると共に、簡単な設備で容
易に成形実施出来る等の利点がある。 As detailed above, the method for blow molding bellows according to the present invention sprays adhesion prevention powder during blow molding of the bellows, makes it adhere uniformly to the inner wall surface of the bellows, and ensures that abnormal noises are not generated when the bellows expand and contract. It has the advantage that it can be prevented from occurring and that it can be easily molded using simple equipment.
第１図、第２図は従来の方法により成形された
ベローズの一部切欠断面図であり、第１図は負圧
が解除された状態を示し、第２図は負圧がかけら
れた状態を示している。第３図は本発明によるベ
ローズの中空成形方法の説明図である。
１……ベローズ、２……環状山部、３……環状
谷部、４，５……隣接内壁面、６……金型、７…
…加圧空気供給コンプレツサー、８……加圧空気
供給管、９……キヤビテイ、１０……パウダー、
１１……パウダー用ホツパー。
Figures 1 and 2 are partially cutaway cross-sectional views of bellows formed by a conventional method, with Figure 1 showing a state in which negative pressure has been released and Figure 2 showing a state in which negative pressure has been applied. It shows. FIG. 3 is an explanatory diagram of a method for blow molding a bellows according to the present invention. DESCRIPTION OF SYMBOLS 1... Bellows, 2... Annular peak, 3... Annular valley, 4, 5... Adjacent inner wall surface, 6... Mold, 7...
... Pressurized air supply compressor, 8 ... Pressurized air supply pipe, 9 ... Cavity, 10 ... Powder,
11...Hopper for powder.
Claims (1)
成形により製造するにあたり、型閉されたパリソ
ン内部にエアーを吹込む際、付着防止用パウダー
を同時に吹込むことを特徴とするベローズの中空
成形方法。1. A method for blow molding bellows, which is characterized in that when blow molding a bellows-shaped molded body made of soft synthetic resin, adhesion prevention powder is simultaneously blown in when air is blown into the inside of the closed parison.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19873283A JPS6090731A (en) | 1983-10-24 | 1983-10-24 | Blow molding method of bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19873283A JPS6090731A (en) | 1983-10-24 | 1983-10-24 | Blow molding method of bellows |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6090731A JPS6090731A (en) | 1985-05-21 |
| JPS6234534B2 true JPS6234534B2 (en) | 1987-07-28 |
Family
ID=16396060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19873283A Granted JPS6090731A (en) | 1983-10-24 | 1983-10-24 | Blow molding method of bellows |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6090731A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0948062A (en) * | 1995-04-10 | 1997-02-18 | Matsushita Electric Ind Co Ltd | Molding method, molding device and molding |
| CN101987340B (en) * | 2009-08-07 | 2014-11-12 | 大诚电子制品(深圳)有限公司 | Material folding equipment and method |
-
1983
- 1983-10-24 JP JP19873283A patent/JPS6090731A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6090731A (en) | 1985-05-21 |
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