JPS5854306B2 - Diaphragm manufacturing method - Google Patents
Diaphragm manufacturing methodInfo
- Publication number
- JPS5854306B2 JPS5854306B2 JP52034128A JP3412877A JPS5854306B2 JP S5854306 B2 JPS5854306 B2 JP S5854306B2 JP 52034128 A JP52034128 A JP 52034128A JP 3412877 A JP3412877 A JP 3412877A JP S5854306 B2 JPS5854306 B2 JP S5854306B2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- membrane
- mold
- recess
- rubber
- 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
Landscapes
- Diaphragms And Bellows (AREA)
Description
【発明の詳細な説明】
本発明は布入りダイアフラムの製造方法に関し、更に詳
しくは外周取付部における基布の埋設状況が改良されて
耐久性に優れたダイアフラムの製造方法を提供するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cloth-filled diaphragm, and more particularly, it provides a method for manufacturing a diaphragm with excellent durability by improving the embedding condition of the base cloth in the outer peripheral attachment part.
ゴム状弾性材料を用いたダイアフラムにおいては、ゴム
膜の強度を補なうために、繊維製の織布を用いてなる基
布が、ダイアフラムの全面積にわたって、ゴム部に埋設
又は貼付された状態で用いられている。In a diaphragm using a rubber-like elastic material, in order to supplement the strength of the rubber membrane, a base fabric made of woven fiber fabric is embedded or attached to the rubber part over the entire area of the diaphragm. It is used in
従来から使用されている布入りダイアフラムは、その一
例を第１図に示す如く、薄肉の膜部１０及び周辺の取付
部２０を通して、表面に近く基布１が埋設された構造と
なっており、取付部２０の一方の面又は両面に密封用突
起４を備えている。A conventionally used cloth-filled diaphragm has a structure in which a base fabric 1 is buried close to the surface through a thin membrane part 10 and a peripheral mounting part 20, as shown in FIG. A sealing protrusion 4 is provided on one or both surfaces of the mounting portion 20.
この型式を備えたダイアフラムが使用されている装置に
おいては、膜部に作用する流体圧によって膜部が一方向
に押された際に膜面に沿って引張力が作用するが、膜部
の往復作動の繰返しに伴ない、特に密封用突起の近傍に
おいてゴム部にこの引張力に起因する亀裂が生じやすく
、そのために密封性が著じるしく低下して、装置として
の機能を維持できなくなることがある。In devices that use this type of diaphragm, when the membrane is pushed in one direction by fluid pressure acting on the membrane, a tensile force is applied along the membrane surface, but the membrane moves back and forth. Due to repeated operation, cracks are likely to occur in the rubber part due to this tensile force, especially in the vicinity of the sealing protrusion, resulting in a significant decrease in sealing performance, making it impossible to maintain the function of the device. There is.
これは第１図に示す如く、基布１がゴム部の表面に近く
埋設されており、特に密封用突起の基部においては、第
２図に１部拡大して示す如（、基布１の織糸２が密封用
突起４の方向に沿う如くなって埋設されることがあるの
で、その様な部位においては、前記した作動圧力による
ダイアフラム表面に沿う引張力によってもたらされる剪
断力に対抗する強度が弱められ、その結果前記したゴム
部の亀裂が発生させられるからである。As shown in FIG. 1, the base fabric 1 is buried close to the surface of the rubber part, and especially at the base of the sealing protrusion, as shown in FIG. Since the thread 2 may be embedded along the direction of the sealing protrusion 4, in such a region, the strength to resist the shearing force caused by the tensile force along the diaphragm surface due to the above-mentioned operating pressure is required. This is because the rubber portion is weakened, and as a result, the above-mentioned cracks are generated in the rubber portion.
前記した従来技術によるダイアフラムの欠点の原因とな
る構造は通常用いられていたその製造方法によってもた
らされるものである。The structure that is responsible for the drawbacks of the prior art diaphragms described above is a result of the commonly used methods of manufacturing them.
即ち、第３図に例示する如く、取付部を成形する溝状凹
所３１及び膜体部を成形する膜体用凹所３２を備えた下
金型３０にゴム材料及び基布用織布を載置し、突起用溝
４１に備えた上金型４０を重ね、加熱加圧して第１図及
び第２図に示す如きダイアフラムの構造が得られる如く
なしているために、基布用織布の織糸がゴム部の表面近
くに留まるからである。That is, as illustrated in FIG. 3, the rubber material and the woven fabric for the base fabric are placed in a lower mold 30 provided with a groove-shaped recess 31 for molding the attachment part and a membrane recess 32 for molding the membrane part. The woven fabric for the base fabric This is because the weaving threads remain near the surface of the rubber part.
（第３図にはダイアフラムは示されていない。(The diaphragm is not shown in FIG. 3.
）本発明は前記した従来技術におけるダイアフラムの欠
点を解消するために、その欠点をもたらすダイアフラム
の構造及び製造方法に着目して、基布が密封用突起の基
部近傍において、ゴム部の表面から離れて取付部内に深
く埋設されて、ゴム部及び基布間の強固な結合力を示す
ダイアフラムの構造をもたらす製造方法を提示するもの
である。) In order to eliminate the drawbacks of the diaphragm in the prior art described above, the present invention focuses on the structure and manufacturing method of the diaphragm that cause the drawbacks, and the present invention focuses on the structure and manufacturing method of the diaphragm that causes the drawbacks. The present invention presents a manufacturing method that provides a diaphragm structure that is deeply embedded within the mounting portion and exhibits strong bonding strength between the rubber portion and the base fabric.
第４図は本発明によってもたらされるダイアフラムの構
造例を示し、第５図はその密封用突起の近傍の一部を拡
大して示すもので、基布１は膜部１０及び取付部２０の
膜部１０に近い部位においては表面近く埋設されている
が、密封用突起４の内側近傍から外方へ向って、取付部
２０のゴム部内へ次第に深く埋められ、取付部２０の外
端部においては膜部１０に対し反対側にある端面２３の
近くに位置している。FIG. 4 shows an example of the structure of the diaphragm provided by the present invention, and FIG. 5 shows an enlarged view of a part of the diaphragm near the sealing protrusion. It is buried near the surface in the area near the part 10, but it is gradually buried deeper into the rubber part of the attachment part 20 from near the inner side of the sealing protrusion 4 outward, and at the outer end of the attachment part 20. It is located near the end surface 23 on the opposite side to the membrane portion 10.
本発明によるダイアフラムが使用されている装置内にお
いて、膜部１０に作用する流体圧によって生起させられ
る引張力は膜部１０内の基布１によって取付部２０に伝
えられ、取付部２０内を斜め外方へ向って横断する如く
埋設されている基布１を通じて取付部２０を構成するゴ
ム部材の弾性に吸収される。In the device in which the diaphragm according to the invention is used, the tensile force generated by the fluid pressure acting on the membrane part 10 is transmitted to the attachment part 20 by the base fabric 1 in the membrane part 10, and the tensile force is transmitted diagonally in the attachment part 20. It is absorbed by the elasticity of the rubber member constituting the attachment portion 20 through the base fabric 1 buried so as to cross outward.
従って従来例において見られた密封用突起４０基部に対
する剪断力が生起されないのでその部分において亀裂を
生じることが無い。Therefore, no shearing force is generated against the base of the sealing protrusion 40, which was observed in the conventional example, and no cracks are generated in that portion.
以下、上記したダイアフラムの構造をもたらす製造方法
に使用される金型及び成形前の準備状況を示し、第７図
は成形時の状況を示すもので、下金型３０はダイアフラ
ムの膜部の裏側面１２（本説明においてダイアフラム各
部の符号は第４図に示すものを使用する）を成形する端
面３４及び取付部２０の内側軸方向面２１を成形する外
側面３５を有する突出部３３並びに取付部の端面２３を
成形する基面３６を備えており、上金型４０は突起用溝
４１が設げられ膜部表面１１を成形する底伺４３及び取
付部外側軸方同筒２２を成形するための内側面４４を有
する凹部４２を備えており、前記下金型の突出部３３を
覆う形状に予め成形された未加硫の弾性材料５及び基布
用の織布３を下金型３０の上に載置し上金型４０を重ね
、第７図に示す如く加圧する。The molds used in the manufacturing method for producing the above-mentioned diaphragm structure and the preparation status before molding are shown below, and FIG. 7 shows the situation during molding. A protruding part 33 and a mounting part having an end face 34 forming the surface 12 (in this description, the reference numerals for each part of the diaphragm are used as shown in FIG. 4) and an outer surface 35 forming the inner axial surface 21 of the mounting part 20. The upper mold 40 has a base surface 36 for molding the end surface 23 of the mold, and the upper mold 40 is provided with a groove 41 for protrusions for molding the bottom plate 43 for molding the membrane surface 11 and the outer axial cylinder 22 of the mounting part. The unvulcanized elastic material 5 and the woven fabric 3 for the base fabric, which have been previously formed into a shape that covers the protrusion 33 of the lower mold, are placed in the lower mold 30. The upper mold 40 is placed on top of the mold, and pressure is applied as shown in FIG.
加圧による成形の進行に連れて弾性材料が織布３の織目
を通って織布の上方に移動して織布が弾性材料内へ埋没
させられるが、織布の外端部は上金型の凹部外側面４４
の端縁に引かれて取付部２０内へ深く沈められ取付部２
０を斜め方向に横断する位置に達し、第４図に示す如き
ダイアフラムが得られる。As the forming by pressure progresses, the elastic material moves upward through the weaves of the woven fabric 3 and the woven fabric is buried in the elastic material, but the outer edge of the woven fabric is Mold recess outer surface 44
The mounting part 2 is pulled by the edge of the mounting part 2 and is deeply sunk into the mounting part 20.
0 is reached in a diagonal direction, and a diaphragm as shown in FIG. 4 is obtained.
本発明のダイアフラムの製造方法においては、ダイアフ
ラムの取付部の内側軸方向面を成形する突出部を一方の
金型に形成されるとともに、上記取付部の外側軸方向面
を形成する凹部を他方の金型に形成されて、成形に際し
、基布用の織布がその端部近傍を凹部内側面の端縁に引
張られるように構成されているために、基布が取付部内
において斜め方向に深く埋設されるので、本発明により
製造されたダイアフラムは、取付部における基布とゴム
部との結合力が強固に保たれ、その結果従来技術による
ダイアフラムにおいて見られた取付部近傍における亀裂
、破損が防止されて、正常なダイアフラムの機能が長時
間にわたって保持される。In the diaphragm manufacturing method of the present invention, the protrusion forming the inner axial surface of the mounting portion of the diaphragm is formed on one mold, and the recess forming the outer axial surface of the mounting portion is formed on the other mold. The woven fabric for the base fabric is formed in the mold so that during molding, the vicinity of the woven fabric for the base fabric is pulled against the edge of the inner surface of the recess. Since the diaphragm manufactured according to the present invention is buried, the bonding force between the base fabric and the rubber portion at the attachment portion is maintained firmly, and as a result, cracks and breakage near the attachment portion, which were observed in diaphragms according to the prior art, are avoided. is prevented and normal diaphragm function is maintained for an extended period of time.
第１図は従来から使用されている商人ダイアフラムの構
造を示す縦断面図、第２図は第１図に示すダイアフラム
の部分拡大図、第３図は第１図に示すダイアフラムの製
造に使用される成形用金型の構造を示す縦断面図、第４
図は本発明によるダイアフラムの構造を示す縦断面図、
第５図は第４図に示すダイアフラムの部分拡大図、第６
図は第４図に示すダイアフラムの製造に使用される成形
用金型の構造及び成形直前における状況を示す縦断面図
、第７図は第６図に示す金型による成形時の状況を示す
縦断面図である。
１・・・・・・基布、２・・・・・・織糸、３・・・・
・・織布、４・・・・・・密封用突起、５・・・・・・
弾性材料、１０・・・・・・膜部、１１・・・・・・膜
部表面、１２・・・・・・膜部裏側面、２０・・・・・
・取付部、２１・・・・・・内側軸方向面、２２・・・
・・・外側軸方向面、２３・・・・・・取付部の端面、
３０・・・・・・下金型、３１・・・・・・溝状凹所、
３２・・・・・・膜体用凹所、３３・・・・・・突出部
、３４・・・・・・突出部端面、３５・・・・・・突出
部外側面、３６・・・・・・基面、４０・・・・・・上
金型、４１・・・・・・突起用溝、４２・・・・・・凹
部、４３・・・・・・凹部底面、４４・・・・・・凹部
内側面。Fig. 1 is a longitudinal cross-sectional view showing the structure of a conventionally used Merchant diaphragm, Fig. 2 is a partially enlarged view of the diaphragm shown in Fig. 1, and Fig. 3 is a diaphragm used in manufacturing the diaphragm shown in Fig. 1. A vertical sectional view showing the structure of a molding die, No. 4
The figure is a longitudinal sectional view showing the structure of a diaphragm according to the present invention.
Figure 5 is a partially enlarged view of the diaphragm shown in Figure 4;
The figure is a longitudinal sectional view showing the structure of the molding die used to manufacture the diaphragm shown in Fig. 4 and the situation immediately before molding, and Fig. 7 is a longitudinal sectional view showing the situation during molding with the mold shown in Fig. 6. It is a front view. 1...Base fabric, 2...Weaving yarn, 3...
...Woven fabric, 4...Sealing protrusion, 5...
Elastic material, 10...Membrane part, 11...Membrane part surface, 12...Membrane part back side, 20...
・Mounting part, 21... Inner axial surface, 22...
... Outer axial surface, 23 ... End surface of the mounting part,
30...Lower mold, 31...Groove recess,
32... Recess for membrane body, 33... Protrusion, 34... End face of protrusion, 35... Outer surface of protrusion, 36... ... Base surface, 40 ... Upper mold, 41 ... Groove for protrusion, 42 ... Recess, 43 ... Bottom surface of recess, 44 ... ...inner surface of the recess.
Claims (1)
び前記取付部２０の取付端面２３を成形する突出部３３
を備えている一方の金型３０と、膜部表面１１．密封用
突起４及び前記取付部２０の外側軸方向面２２を成形す
る凹部４２を備えている他方の金型４０の間に、ゴム状
弾性材料５及び基布用織布３を配置し、前記両金型３０
．４０を押圧し、前記織布３の端縁近傍部が前記凹部４
２の外側面４４の端縁に引かれて、前記織布３が前記取
付部２０の内方から外方に向って広がるとともに、軸方
向に偏移して前記取付部２０内を斜め方向に横断して埋
設される様に成形することを特徴とするダイアフラムの
製造方法。1. A protrusion 33 that forms the back surface 12 of the membrane portion, the inner axial surface 21 of the mounting portion 20, and the mounting end surface 23 of the mounting portion 20.
One mold 30 is provided with a membrane portion surface 11. A rubber-like elastic material 5 and a woven base fabric 3 are placed between the other mold 40, which is provided with a sealing protrusion 4 and a recess 42 for molding the outer axial surface 22 of the attachment part 20, and the Both molds 30
．． 40, so that a portion near the edge of the woven fabric 3 forms the recess 4.
2, the woven fabric 3 spreads from the inside to the outside of the attachment part 20, and shifts in the axial direction to move inside the attachment part 20 in an oblique direction. A method for manufacturing a diaphragm, characterized by forming the diaphragm so that it is buried across the diaphragm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52034128A JPS5854306B2 (en) | 1977-03-28 | 1977-03-28 | Diaphragm manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52034128A JPS5854306B2 (en) | 1977-03-28 | 1977-03-28 | Diaphragm manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53120040A JPS53120040A (en) | 1978-10-20 |
| JPS5854306B2 true JPS5854306B2 (en) | 1983-12-03 |
Family
ID=12405587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52034128A Expired JPS5854306B2 (en) | 1977-03-28 | 1977-03-28 | Diaphragm manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5854306B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58133650U (en) * | 1982-03-03 | 1983-09-08 | エヌオーケー株式会社 | diaphragm |
| JP2003021234A (en) * | 2001-07-05 | 2003-01-24 | Nok Corp | Diaphragm |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4941451A (en) * | 1972-08-30 | 1974-04-18 | ||
| JPS5053903A (en) * | 1973-09-13 | 1975-05-13 |
-
1977
- 1977-03-28 JP JP52034128A patent/JPS5854306B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4941451A (en) * | 1972-08-30 | 1974-04-18 | ||
| JPS5053903A (en) * | 1973-09-13 | 1975-05-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53120040A (en) | 1978-10-20 |
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