JPH03377A - Manufacture of diaphragm having uneven multi-grooved structure - Google Patents
Manufacture of diaphragm having uneven multi-grooved structureInfo
- Publication number
- JPH03377A JPH03377A JP13218689A JP13218689A JPH03377A JP H03377 A JPH03377 A JP H03377A JP 13218689 A JP13218689 A JP 13218689A JP 13218689 A JP13218689 A JP 13218689A JP H03377 A JPH03377 A JP H03377A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- metal mold
- mold
- sheet
- ring
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 229920001971 elastomer Polymers 0.000 claims abstract description 29
- 239000000806 elastomer Substances 0.000 claims description 18
- 239000002131 composite material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000012528 membrane Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 238000004132 cross linking Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 2
- 229920005558 epichlorohydrin rubber Polymers 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- YMHOBZXQZVXHBM-UHFFFAOYSA-N 2,5-dimethoxy-4-bromophenethylamine Chemical compound COC1=CC(CCN)=C(OC)C=C1Br YMHOBZXQZVXHBM-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 241000545067 Venus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Diaphragms And Bellows (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、凹凸多溝構造を設けることにより可撓性を著
しく増大させｔ；ダイヤフラムの製造方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a diaphragm whose flexibility is significantly increased by providing an uneven multi-groove structure.
通常、エラストマーのシートは可撓性が大きいシートと
して知られている。Generally, elastomer sheets are known as highly flexible sheets.
これは他の材質と比較して、弾性率が低いｔ；め、シー
トが屈曲しや゛すいためであり、また、シートが伸びた
りする変形も他の材質よりも小さい力で行えるためであ
る。This is because the sheet bends easily due to its lower elastic modulus compared to other materials, and also because the sheet can be deformed by stretching with less force than other materials. .
しかし、薄いエラストマーシートにおいても、屈曲変形
に要する力と延伸変形に要する力では著しく相違する。However, even in a thin elastomer sheet, the force required for bending deformation and the force required for stretching deformation are significantly different.
エラストマーシートにおいて、延伸を伴う変形に対する
可撓性を要求される場合、この延伸方向に対して垂直方
向に多数の凹凸溝構造を設けると、アコーデオン式の機
構により、エラストマーシートの延伸変換を屈曲変形に
変換することができる。When an elastomer sheet is required to have flexibility against deformation that accompanies stretching, providing a large number of uneven groove structures in the direction perpendicular to the stretching direction allows an accordion-like mechanism to bend and deform the elastomer sheet. can be converted to .
これにより、小さい力によりエラストマーシートが延伸
されエラストマーシートの可撓性が著しく増大する。As a result, the elastomer sheet is stretched with a small force, and the flexibility of the elastomer sheet is significantly increased.
本発明は、凹凸多溝構造を有する可撓性が大きいダイヤ
フラムの製造方法に関するものである。The present invention relates to a method for manufacturing a highly flexible diaphragm having an uneven multi-groove structure.
［従来の技術］
通常は、かかる凹凸多溝構造を有するダイヤフラムを製
造しようとする場合は、このダイヤフラムと一致する空
間を有する上下の一組みの凹凸多溝状リブ面を有する金
型の間に材料シートを挟み、これを加熱しながらプレス
して凹凸溝部を製造する。この場合、上の金をと下の金
型との間は材料シートの厚さの間隔があり、材料シート
は表裏両面とも上下の金型にぴったりと押さえられてい
る。[Prior Art] Normally, when manufacturing a diaphragm having such an uneven multi-groove structure, a mold is formed between a pair of upper and lower uneven rib surfaces having a space corresponding to the diaphragm. A material sheet is sandwiched and pressed while heating to produce an uneven groove. In this case, there is a gap equal to the thickness of the material sheet between the upper metal and the lower mold, and both the front and back sides of the material sheet are tightly pressed by the upper and lower molds.
例えば、凹凸多溝構造を成形する凹凸状溝部の金型の凸
状リブと下の金型の凹状溝とは材料シートに接触して上
と下からシートをしっかりと押さえて加熱する。For example, the convex ribs of the mold of the concavo-convex groove portion for molding the concave-convex multi-groove structure and the concave grooves of the lower mold contact the material sheet to firmly press and heat the sheet from above and below.
しかし、このような方法では、仮に金をの寸法精度を高
め、また材料シートの厚みを均一にしても、シートと金
型が不均一に接触するのが避けられなく金型の間隙をう
めるようにエラストマーが流動する。そのためプレス後
の製品に不均一な残留歪が生じるのが免れなかった。However, with this method, even if the dimensional accuracy of the gold is improved and the thickness of the material sheet is made uniform, uneven contact between the sheet and the mold is unavoidable, and it is necessary to fill the gap between the molds. The elastomer flows. Therefore, it was inevitable that uneven residual strain would occur in the product after pressing.
このような、残留歪をなくすためにシートの厚みの精度
及び金型精度を極度に上げようとしても、そのような精
度の材料シートを作ることは非常に困難であるし、金型
も高価になるという問題点が生じる。Even if we try to increase the precision of the sheet thickness and the precision of the mold to the extreme in order to eliminate residual strain, it is extremely difficult to make a material sheet with such precision, and the mold is also expensive. A problem arises.
［発明が解決しようとする課題］
本発明は、均一で大きい可撓性を有するダイヤプラムを
製造する方法を提供することを目的とするものである。[Problems to be Solved by the Invention] An object of the present invention is to provide a method for manufacturing a diaphragm having uniform and high flexibility.
［課題を解決するための手段］
本発明者らは、延伸に対するを可撓性を有するダイヤフ
ラムを成形歪みなしに製造するためには、ダイヤプラム
をできるだけ固定しないで成形すれば、可撓性の均一な
ダイヤプラムが得られることを発見して、この知見に基
づいて本発明を完成した。[Means for Solving the Problems] The present inventors believe that in order to manufacture a diaphragm that is flexible against stretching without molding distortion, if the diaphragm is molded without being fixed as much as possible, the flexibility can be improved. It was discovered that a uniform diaphragm could be obtained, and the present invention was completed based on this knowledge.
すなわち、本発明は、エラストマー複合シートを上下金
型に挟みプレスするダイヤフラムの製造方法において、
該金型面の少なくとも一部に凸状リブ部と凹溝部を有す
る一組みの上下の金型であって、該凸状に相手方の凹溝
部が表金相対する位置に設けられたものに、該エラスト
マー複合シートを挟んだときに、該金型の凸状リブを有
する面においては、エラストマー複合シートの片面は凸
リブ部に接しており、その裏面は相対する凹溝空間に開
放されている状態で加熱し架橋成形することを特徴とす
る凹凸多溝構造を有するダイヤフラムの製造方法を提供
するものである。That is, the present invention provides a method for manufacturing a diaphragm in which an elastomer composite sheet is sandwiched between upper and lower molds and pressed.
A pair of upper and lower molds having a convex rib part and a concave groove part on at least a part of the mold surface, wherein the convex part of the other concave groove part is provided at a position facing the face metal, When the elastomer composite sheet is sandwiched, one side of the elastomer composite sheet is in contact with the convex rib portion on the surface of the mold having the convex rib, and the back side is open to the opposing groove space. The present invention provides a method for manufacturing a diaphragm having an uneven multi-groove structure, which is characterized in that the diaphragm is cross-linked and heated in a state where the diaphragm is cross-linked.
本発明により製造される凹凸多溝構造を有するダイヤフ
ラムは、ダイヤフラムの全面又は一部に凹凸多溝構造を
有するものであり、凹凸多溝構造とは第１図に示すよう
に、少なくとも一部の断面が波形２になっているもので
ある。ダイヤフラムの形は制限がなく、円形、方形その
他どのようなものも使用することができ、各凹凸溝の形
状も円形若しくは角型の環状又は単なる直線若しくは曲
線状のものを使用することができる。The diaphragm having an uneven multi-groove structure manufactured by the present invention has an uneven multi-groove structure on the entire surface or a part of the diaphragm. The cross section has a waveform 2. The shape of the diaphragm is not limited and may be circular, rectangular or any other shape, and the shape of each uneven groove may be circular or square annular, or simply straight or curved.
本発明の凹凸多溝構造を有するダイヤプラムの一例は、
例えば、第２図に示すような、１枚の平面的なゴムシー
トの中央部３及び周縁部１が平面であり、中央部３と周
縁部１の間に同心円的に多数の凹凸溝２が並列されてい
るもの及び第３図に示すように中央の平面部３が矩形で
あり、その周囲に相似形の矩形の凹凸多溝構造２を設け
たものがある。An example of a diaphragm having an uneven multi-groove structure according to the present invention is
For example, as shown in FIG. 2, the center part 3 and peripheral edge part 1 of one flat rubber sheet are flat, and a large number of uneven grooves 2 are concentrically formed between the central part 3 and the peripheral edge part 1. There are those in which the central plane part 3 is rectangular as shown in FIG. 3, and a similar rectangular uneven multi-groove structure 2 is provided around the central plane part 3.
第２図及び第３図に示すものは、ガスメータの計量膜と
して使用するダイヤフラムである。これを計量膜として
使用する場合は、中央の平面部に薄い金属板又はプラス
チック製板を貼り付け、第４図に示すようにガスメータ
に垂直に保持さして使用する。What is shown in FIGS. 2 and 3 is a diaphragm used as a measuring membrane of a gas meter. When using this as a metering membrane, a thin metal plate or plastic plate is attached to the central flat part, and the membrane is held perpendicularly to the gas meter as shown in FIG.
この場合は、通常ガス圧力がかからないときは、この膜
の直径は上下の枠間の直径と一致し、垂直になっている
。中央部３の両面には金属薄板４．５が貼り付けである
。In this case, when no gas pressure is normally applied, the diameter of this membrane matches the diameter between the upper and lower frames and is vertical. Thin metal plates 4.5 are attached to both sides of the central portion 3.
この膜にガスの圧力が掛かると中央の平面部３の周縁に
ある多数の凹凸溝構造部２が敏感に延伸されるので、小
さなガス圧力の差で敏感に左右に移動することができる
。このような凹凸溝構造を有するダイヤフラムにより正
確にガス量を積算することができる。When gas pressure is applied to this membrane, the many uneven groove structures 2 on the periphery of the central plane part 3 are sensitively stretched, so that it can be sensitively moved from side to side with a small difference in gas pressure. A diaphragm having such a concavo-convex groove structure allows the gas amount to be accumulated accurately.
本発明製造方法により、例えば、第２図の計量膜である
ダイヤフラムを製造する場合は、第５図のような断面の
金型を使用して、材料シートをプレスすれば製造するこ
とができる。For example, when manufacturing a diaphragm, which is a metering membrane shown in FIG. 2, by the manufacturing method of the present invention, it can be manufactured by pressing a material sheet using a mold having a cross section as shown in FIG.
この金型は、上部金型１１と下部金型１２からなり、上
部金型１１は円形平面部１５と周縁部２１の平面部並び
に多数の並列したリング状凸状リブ１３及びゴムに接触
しないリング状凹部１９がある。This mold consists of an upper mold 11 and a lower mold 12, and the upper mold 11 has a circular plane part 15, a flat part of a peripheral part 21, a large number of parallel ring-shaped convex ribs 13, and a ring that does not contact the rubber. There is a shaped recess 19.
このリング状形状は、通常は、ダイヤフラムの形状に対
応して選択されるものであり、製造するダイヤフラムの
形に応じて、凸状リブ又は凹部の形状は四角形状又は多
角形状にすることができる。This ring-shaped shape is usually selected in accordance with the shape of the diaphragm, and the shape of the convex rib or recess can be square or polygonal depending on the shape of the diaphragm to be manufactured. .
これに対面する下部金を１２は、円形平面部１６と周縁
部２２の平面部並びに上部金型１１の凹部１９に嵌合す
る位置にリング状凸状リブ１４があり、上部金ｆｉｔｘ
のリング状凸状リブ１３を受は入れる位置にリング状凹
部２０が設けである。The lower metal fitting 12 facing this has a ring-shaped convex rib 14 at a position that fits into the circular flat part 16, the flat part of the peripheral edge part 22, and the recess 19 of the upper mold 11, and the upper mold fitting
A ring-shaped recess 20 is provided at a position to receive the ring-shaped convex rib 13.
本発明製造方法に用いるエラストマー複合シートは、例
えば、ゴムに架橋剤、架橋助剤、補強剤などの通常使用
されるゴム添加剤を配合したものを圧延し、繊維に圧着
して得ることこができる。The elastomer composite sheet used in the production method of the present invention can be obtained by, for example, rolling a mixture of rubber with commonly used rubber additives such as a crosslinking agent, a crosslinking aid, and a reinforcing agent, and pressing it onto fibers. can.
ここに使用するエラストマーとしては、金星中で架橋反
応により成形されるものであればどのようなものでも使
用することができ、例えば、天然ゴム、ＳＢＲ，溶液重
合５ＢＲ１ＢＲ，ＮＢＲ。As the elastomer used here, any elastomer that can be molded by crosslinking reaction in Venus can be used, such as natural rubber, SBR, solution polymerized 5BR1BR, and NBR.
ＣＲ，ＥＰＤＭ、Ｉ ＩＲ，エピクロールヒドリンゴム
、プロピレンオキサイドゴムなどの架橋タイプのエラス
トマーを使用することができる。Crosslinked elastomers such as CR, EPDM, IIR, epichlorohydrin rubber, and propylene oxide rubber can be used.
本発明に用いる複合材料シートとしては、織布又は不織
布を使用し、これに上記エラストマーを展着したゴム引
き布及び前記ニジストマーをフィルムにラミネートした
シートを材料として使用することができる。As the composite material sheet used in the present invention, a woven fabric or a nonwoven fabric can be used, and a rubberized cloth in which the above-mentioned elastomer is spread and a sheet in which the above-mentioned nidistomer is laminated to a film can be used as the material.
第５図の上下の金型に材料シートを挟んで閉じると、中
央の円形平面部及び周縁部では材料シートは上下の金型
の平面に接触してプレスされている。When the material sheet is sandwiched between the upper and lower molds in FIG. 5 and closed, the material sheet is pressed in contact with the flat surfaces of the upper and lower molds at the central circular plane part and the peripheral edge part.
しかし、リング状凸状リブ１３及び１４には接触してい
るが、その裏面の凹部１９及び２０には材料シートは接
触していない。However, although the material sheet is in contact with the ring-shaped convex ribs 13 and 14, it is not in contact with the recesses 19 and 20 on the back surface thereof.
そのため周縁部と中央平面部の間の材料シートは凸状リ
ブによる深絞りの溝変形の際に固定されないで自由に延
伸され、凸状リブ部の垂直方向及び平行方向に均一な厚
さの凹凸多溝構造が得られる。Therefore, the material sheet between the peripheral edge and the central plane part is not fixed during deep drawing groove deformation by the convex ribs, but is freely stretched, and the unevenness of uniform thickness is created in the vertical and parallel directions of the convex ribs. A multi-groove structure is obtained.
このような金をにより材料シートを固定し加熱すると、
架橋反応が進行して凹凸多溝構造を有するダイヤフラム
を製造することかでさる。When a sheet of material is fixed and heated with such gold,
This is because the crosslinking reaction progresses to produce a diaphragm having a concavo-convex, multi-groove structure.
［実施例ゴ
ポリエステルの１００デニールの厚さ０．１５■の平織
り引布に架橋剤入りエピクロールヒドリンゴムを塗布し
て厚さ０．３４ｍｍのゴムシートを１０ｃｍの直径に切
断して、第５図の直径１０ＣＩＩ＋の金型に入れて金を
を閉じて、金型温度１６０℃で３０分間プレスして凹凸
多溝構造を有するガスメータ用ダイヤフラムを製造した
。[Example: A rubber sheet of 0.34 mm thick was coated with crosslinking agent-containing epichlorohydrin rubber on a 100 denier polyester plain weave fabric with a thickness of 0.15 cm, and the rubber sheet was cut into a 10 cm diameter rubber sheet. The mold was placed in a mold having a diameter of 10 CII+ as shown in the figure, the mold was closed, and pressed for 30 minutes at a mold temperature of 160° C. to produce a diaphragm for a gas meter having an uneven multi-groove structure.
このダイヤフラムを組込んだガスメータで計量した結果
、ガス圧力に対する反応として敏感に反応する可撓性に
優れた計量膜であった。As a result of measuring with a gas meter incorporating this diaphragm, it was found that the measuring membrane had excellent flexibility and reacted sensitively to gas pressure.
［発明の効果］
本発明の製造方法により製造したダイヤフラムは均一な
凹凸多溝構造が得られるので非常に可視性に優れ、例え
ば、これをガスメータの計量膜に使用した場合などは、
ガス圧力に敏感に作動して移動するので正確な容積を測
定することができる。[Effects of the Invention] The diaphragm manufactured by the manufacturing method of the present invention has a uniform uneven multi-groove structure, so it has excellent visibility. For example, when this is used as a measuring membrane of a gas meter,
Since it operates and moves sensitively to gas pressure, it can accurately measure volume.
更に、本発明のダイヤフラムは、耐圧強度を必要とし、
且つ微圧の流体に応動する機器に使用することができる
。Furthermore, the diaphragm of the present invention requires compressive strength,
In addition, it can be used in equipment that responds to low pressure fluids.
第１図は本発明製造方法により製造される凹凸多溝構造
を有するダイヤフラムの一例のガスメータ用計量膜の断
面図であり、第２図はその平面図であり、第３図は他の
計量膜ダイヤプラムの平面図であり、第４図は計量膜の
作動状況の説明図であり、第５図は本発明製造方法に用
いる金型の構造を示す断面図である。
図中の符号は、１：膜周縁部、２；凹凸波形溝部、３；
中央平面部、４，５；膜板、１１；上部金型、１２；下
部金型、１３，１４；リング状凸状リブ、１５，１６；
平面部、１７．１８；金型閉鎖面、１９，２０；リング
状凹部、２１．２２；金型周縁部、Ａ；計量膜ゴムシー
トの中央平面部、Ｂ；凹凸多溝構造部、Ｃ；膜板、Ｄ；
膜保持部、Ｅ：計量体積である。FIG. 1 is a cross-sectional view of a gas meter metering membrane which is an example of a diaphragm having an uneven multi-groove structure manufactured by the manufacturing method of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view of another metering membrane. FIG. 4 is a plan view of the diaphragm, FIG. 4 is an explanatory diagram of the operating state of the metering membrane, and FIG. 5 is a sectional view showing the structure of a mold used in the manufacturing method of the present invention. The symbols in the figure are: 1: Membrane periphery, 2: Concave and convex wave groove, 3;
Central plane part, 4, 5; membrane plate, 11; upper mold, 12; lower mold, 13, 14; ring-shaped convex rib, 15, 16;
Flat part, 17.18; Mold closing surface, 19, 20; Ring-shaped recessed part, 21.22; Mold peripheral part, A; Central flat part of metering membrane rubber sheet, B; uneven multi-groove structure part, C; Membrane plate, D;
Membrane holding part, E: Measuring volume.
Claims (1)
るダイヤフラムの製造方法において、該金型面の少なく
とも一部に凸状リブ部と凹溝部を有する一組みの上下の
金型であって、該凸状に相手方の凹溝部が嵌合相対する
位置に設けられたものに、該エラストマー複合シートを
挟んだときに、該金型の凸状リブを有する面においては
、エラストマー複合シートの片面は凸リブ部に接してお
り、その裏面は相対する凹溝空間に開放されている状態
で加熱し架橋成形することを特徴とする凹凸多溝構造を
有するダイヤフラムの製造方法。２ ゴムシートが中央
部に平面部を有し、周縁部との間に多数の環状の凹凸波
形溝を並列したものである請求項１記載のダイヤフラム
の製造方法。1. A method for manufacturing a diaphragm in which an elastomer composite sheet is sandwiched and pressed between upper and lower molds, a pair of upper and lower molds having a convex rib portion and a concave groove portion on at least a portion of the mold surface, the convex When the elastomer composite sheet is sandwiched between the molds provided with the concave grooves of the other party in the opposing positions, one side of the elastomer composite sheet will have the convex ribs on the surface of the mold that has the convex ribs. A method for manufacturing a diaphragm having an uneven multi-groove structure, characterized in that the diaphragm is heated and cross-linked in a state in which the diaphragm is in contact with the diaphragm and its back surface is open to an opposing groove space. 2. The method of manufacturing a diaphragm according to claim 1, wherein the rubber sheet has a flat part in the center and a large number of annular corrugated grooves arranged in parallel between the flat part and the peripheral part.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1132186A JPH0788903B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing diaphragm having uneven multi-groove structure |
| DE69029223T DE69029223T2 (en) | 1989-05-25 | 1990-05-22 | Measuring membrane for gas meter, manufacturing process therefor and gas meter working with it |
| EP90109764A EP0399489B1 (en) | 1989-05-25 | 1990-05-22 | A measuring diaphragm for gasmeter, a method of preparation thereof and a gasmeter utilizing it |
| US08/221,559 US5422064A (en) | 1989-05-25 | 1994-04-01 | Method for manufacturing a diaphragm for a gasmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1132186A JPH0788903B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing diaphragm having uneven multi-groove structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03377A true JPH03377A (en) | 1991-01-07 |
| JPH0788903B2 JPH0788903B2 (en) | 1995-09-27 |
Family
ID=15075406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1132186A Expired - Fee Related JPH0788903B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing diaphragm having uneven multi-groove structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0788903B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004535313A (en) * | 2001-06-19 | 2004-11-25 | ダイムラークライスラー・アクチェンゲゼルシャフト | Mold for manufacturing molded articles with diaphragm |
| US9630297B2 (en) | 2011-12-29 | 2017-04-25 | 3M Innovative Properties Company | Coated abrasive article and method of making the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58147728U (en) * | 1982-03-30 | 1983-10-04 | 株式会社カクオ−精機 | Box-shaped case molding equipment |
| JPS61228942A (en) * | 1985-04-03 | 1986-10-13 | Toyoda Gosei Co Ltd | Manufacture of diaphragm |
| JPS6215330A (en) * | 1985-07-13 | 1987-01-23 | Hara Shiyokuki Seisakusho:Kk | Rocking of comber nipper frame and apparatus therefor |
-
1989
- 1989-05-25 JP JP1132186A patent/JPH0788903B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58147728U (en) * | 1982-03-30 | 1983-10-04 | 株式会社カクオ−精機 | Box-shaped case molding equipment |
| JPS61228942A (en) * | 1985-04-03 | 1986-10-13 | Toyoda Gosei Co Ltd | Manufacture of diaphragm |
| JPS6215330A (en) * | 1985-07-13 | 1987-01-23 | Hara Shiyokuki Seisakusho:Kk | Rocking of comber nipper frame and apparatus therefor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004535313A (en) * | 2001-06-19 | 2004-11-25 | ダイムラークライスラー・アクチェンゲゼルシャフト | Mold for manufacturing molded articles with diaphragm |
| US9630297B2 (en) | 2011-12-29 | 2017-04-25 | 3M Innovative Properties Company | Coated abrasive article and method of making the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0788903B2 (en) | 1995-09-27 |
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