JPH0332442B2 - - Google Patents
Info
- Publication number
- JPH0332442B2 JPH0332442B2 JP57131709A JP13170982A JPH0332442B2 JP H0332442 B2 JPH0332442 B2 JP H0332442B2 JP 57131709 A JP57131709 A JP 57131709A JP 13170982 A JP13170982 A JP 13170982A JP H0332442 B2 JPH0332442 B2 JP H0332442B2
- Authority
- JP
- Japan
- Prior art keywords
- cork
- oil
- mold
- impregnated
- friction material
- 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 - Lifetime
Links
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Braking Arrangements (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
【発明の詳細な説明】
本発明はコルクの摩擦特性をほとんど損うこと
なく、しかも耐摩耗性を大幅に向上せしめると共
に、油の含浸量を増加せしめたコルク摩擦材を成
型する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a cork friction material that substantially improves wear resistance and increases oil impregnation without substantially impairing the frictional properties of cork.
従来、天然品の優れた特性、特に優れた摩擦係
数を有するコルクを粉砕した粒子を接着剤を介し
て圧縮結合して摩擦板に活用して、工業用ミシン
などのクラツチ、モーターのクラツチフエーシン
グやブレーキシユー等に多く使用されていた。し
かし、コルクは物理的強度が低く、クラツチやブ
レーキの作動時に鳴き音や摩擦熱による異臭の発
生、さらに半クラツチ等による異常摩耗で寿命の
低下などの欠点があつた。 Conventionally, particles of crushed cork, which has the excellent properties of natural products, especially the excellent coefficient of friction, have been compressed and bonded via adhesive and used to make friction plates for clutches such as industrial sewing machines and clutch facings for motors. It was widely used in brake shoes, etc. However, cork has low physical strength, and has disadvantages such as making noise when the clutch or brake is activated, producing a strange odor due to frictional heat, and shortening the life of the clutch due to abnormal wear caused by the clutch being partially engaged.
このためこれを解決する方法として、コルク粒
子を接着剤を介して一体に成型したコルク摩擦材
の粒間空隙に油を含浸せしめて、耐摩耗性を向上
せしめていたが、従来は該接着剤はフエノール樹
脂、ユリア樹脂、酢酸ビニル樹脂等の接着剤を使
用し、コルク粒子を圧縮結合せしめていたため、
コルク粒間及び接着剤との空隙は極めて少なく、
これに常温もしくは加温下真空あるいは加圧含浸
する方法で油を含浸せしめても、油の含浸量は10
％以下と極めて少なく、目的とする耐摩耗性の向
上はあまり得られず、かつ油の含浸はほとんど摩
擦材の表面部分に集中し、長期使用時には表面の
油が除去され、油はわずかしか残留せず耐摩耗性
は著しく低下してしまう欠点があつた。 To solve this problem, cork particles are integrally molded with an adhesive, and the intergranular spaces of the cork friction material are impregnated with oil to improve wear resistance. Because cork particles were compressed and bonded using adhesives such as phenolic resin, urea resin, and vinyl acetate resin,
There are very few voids between cork particles and the adhesive,
Even if this is impregnated with oil by vacuum or pressure impregnation at room temperature or heating, the amount of oil impregnated is 10%.
% or less, the desired improvement in wear resistance cannot be obtained much, and most of the oil impregnation is concentrated on the surface of the friction material, and during long-term use, the oil on the surface is removed and only a small amount of oil remains. However, there was a drawback that the wear resistance was significantly reduced.
本発明はこれらの欠点を除去し、作業が簡単で
しかも油の含浸量が多く、コルク摩擦材の表面部
分のみならず中心部まで油が含浸したコルク摩擦
材を成型する方法を提供するものである。 The present invention eliminates these drawbacks and provides a method for molding a cork friction material that is easy to work with, has a large amount of oil impregnated, and is impregnated with oil not only on the surface but also in the center. be.
本発明は適当な大きさを有するコルク粒子、実
質的には10〜80メツシユのものを接着剤を介して
一体に成型して得るコルク摩擦材に、油（植物油
あるいは鉱物油等限定されない）を含浸せしめる
コルク摩擦材の成型方法である。 In the present invention, oil (not limited to vegetable oil or mineral oil) is added to a cork friction material obtained by integrally molding cork particles having an appropriate size, substantially 10 to 80 mesh, using an adhesive. This is a method of molding cork friction material by impregnating it.
本発明は成型金型内にコルク粒と接着剤を所定
量投入すると同時にあらかじめ油を所望量含浸さ
せた軟質ウレタンシート等の発泡シートを金型の
上下、またはどちらか一方に挿入し、これを圧縮
する時該発泡シートより油がにじみ出させながら
コルク粒、及び接着剤間全体に浸透する。この浸
透した状態で圧縮固着せしめる。 In the present invention, a predetermined amount of cork grains and adhesive are put into a mold, and at the same time, a foam sheet such as a soft urethane sheet impregnated with a desired amount of oil is inserted into the top and bottom of the mold, or either one of them. When compressed, oil oozes out from the foam sheet and penetrates throughout the cork grains and the adhesive. In this permeated state, it is compressed and fixed.
または他の方法として、成型金型内に所定量投
入されたコルク粒と接着剤を圧縮するとき、金型
内面に複数個設けたノズルから所望量の油を噴
霧、或いは注入しながら圧縮固着しても前述と同
様に油を含浸した摩擦材を成型することが可能と
なる。このためコルク摩擦材のコルク粒間の中心
部まで多量の油を含浸できるので、従来ではなし
得なかつた多量の油、クラツチフエーシングやブ
レーキシユー等の使用に適したコルク粒子に対す
る重量比が25〜30％重量比の油を含浸せしめたコ
ルク摩擦材を容易に得ることが出来る。また油の
含浸量はそのコルク摩擦材の使用目的、用途によ
つて15〜50％重量比が適当で最適には25〜30％重
量比であるが、本発明によれば発泡シートの油
量、或は噴霧、注入油量をコントロールすること
により容易にこの数値のものを得ることが出来
る。 Alternatively, when compressing a predetermined amount of cork grains and adhesive injected into a mold, a desired amount of oil is sprayed or injected from multiple nozzles provided on the inside of the mold, and the mixture is compressed and fixed. However, it is possible to mold a friction material impregnated with oil in the same manner as described above. As a result, a large amount of oil can be impregnated into the center between the cork grains of the cork friction material, allowing a large amount of oil to be impregnated into the center of the cork particles, which was not possible before, and a weight ratio of cork particles to cork particles suitable for use in clutch facings, brake shoes, etc. A cork friction material impregnated with oil at a weight ratio of 25 to 30% can be easily obtained. In addition, the amount of oil impregnated is suitably 15 to 50% by weight depending on the purpose and application of the cork friction material, and the most suitable is 25 to 30% by weight, but according to the present invention, the amount of oil in the foam sheet is Alternatively, this value can be easily obtained by controlling the amount of oil sprayed or injected.
次に実施例によつて本発明を説明する。 Next, the present invention will be explained with reference to Examples.
本発明は、第１図で示した工程をもつて成型さ
れ、その内で油の含浸される圧縮工程を第２図に
よつて示す。 The present invention is molded using the steps shown in FIG. 1, and the compression step in which oil is impregnated is shown in FIG. 2.
まず、第１図のように30〜70メツシユに精製さ
れたコルク粒１と接着剤との混合工程を経て、第
２図で示す型２内にこれを投入せしめる。このと
き所望量の油を含浸せしめた発泡シート３を一緒
に投入せしめるかあるいは上型２ａに設けたノズ
ル４から所望量の油を噴霧あるいは注入し圧縮Ｐ
を加えて、圧縮前は0.1〜0.15ｇ／cm3の密度もの
を、圧縮後は0.4〜0.6ｇ／cm3の密度を持つコルク
摩擦材を形成する。この方法によつて油の含浸量
が０％、５％、15％、20％、25％、30％、35％、
45％、60％のコルク摩擦材をそれぞれ作つて、摩
擦係数、摩擦量を各々測定した所、表１及び表２
のグラフのような良好な数値を得た。 First, as shown in FIG. 1, cork grains 1 refined into 30 to 70 meshes are mixed with an adhesive, and then poured into a mold 2 shown in FIG. At this time, a foam sheet 3 impregnated with a desired amount of oil is added together, or a desired amount of oil is sprayed or injected from a nozzle 4 provided in the upper mold 2a to compress the
is added to form a cork friction material having a density of 0.1 to 0.15 g/cm 3 before compression and 0.4 to 0.6 g/cm 3 after compression. By this method, the amount of oil impregnated is 0%, 5%, 15%, 20%, 25%, 30%, 35%,
45% and 60% cork friction materials were made respectively, and the friction coefficient and amount of friction were measured, as shown in Tables 1 and 2.
We obtained good numbers as shown in the graph.
なお、油の含浸量が60％以上の場合はそれ以上
はコルク摩擦材内部で保有することが出来ず、油
は外へ流出してしまうため、実質上は作製するこ
とは出来ない。 Note that if the amount of oil impregnated is 60% or more, it cannot be retained inside the cork friction material and the oil will flow out, so it is virtually impossible to manufacture it.
表１の摩擦係数を見ても油による係数の低下は
ごく僅かで、摩擦特性を損うことなく、かつ表２
のように、油の添加による摩耗量は15％含浸のも
のから大幅に減少しその効果は顕著に表われてい
る。 Looking at the friction coefficient in Table 1, the decrease in the coefficient due to oil is very small, without impairing the friction characteristics, and in Table 2
As shown in the figure, the amount of wear due to the addition of oil is significantly reduced compared to the one with 15% impregnation, and its effect is clearly visible.
この様に本発明によればコルク粒子間及び接着
剤に含浸された油の作用により、摩擦係数を損う
ことなく、摩耗特性を大幅に向上せしめ、コルク
摩擦材の寿命を長期に保つことが出来る上に、油
の分布がほぼ均一であるためブロツクからの切断
加工による工作で得られたコルク摩擦材も、その
効果は同等のものか得られ、従来方法では得られ
ない秀れたコルク摩擦材の成型方法である。 As described above, according to the present invention, due to the action of the oil impregnated between the cork particles and the adhesive, the wear characteristics can be significantly improved without impairing the friction coefficient, and the life of the cork friction material can be maintained for a long time. Not only that, but the distribution of oil is almost uniform, so even cork friction material obtained by machining by cutting from a block can have the same effect or excellent cork friction that cannot be obtained with conventional methods. This is a method of molding the material.
第１図は本発明のコルク摩擦材を形成する工程
図である。第２図は第１図の工程中の油含浸圧縮
成型工程を示した略図である。
Ｐ……圧縮、１……コルク粒、２……型、３…
…発泡シート、４……ノズル。
FIG. 1 is a process diagram for forming the cork friction material of the present invention. FIG. 2 is a schematic diagram showing the oil-impregnated compression molding process in the process of FIG. 1. P...compression, 1...cork grain, 2...mold, 3...
...Foam sheet, 4...nozzle.
Claims (1)
を含浸させたコルク摩擦材の成形方法において、
成形金型内にコルク粒と接着剤とを混合したもの
を投入するときに金型の上下、またはどちらか一
方に発泡シートにあらかじめ油を含浸せしめたも
のを一緒に金型内に入れ、成形金型で圧縮成形す
るとき該発泡シートより油をにじみ出させなが
ら、所望量の油をコルク粒間に供給し、圧縮固着
せしめると同時に油を含浸せしめることを特徴と
したコルク摩擦材の成形方法。 ２ コルク粒子を接着剤を介して一体に成型し油
を含浸させたコルク摩擦材の成型方法において、
成型金型内にコルク粒と接着剤とを混合したもの
を投入するときに該成型金型の上下面、またはど
ちらか一方に複数個設けたノズルより成型金型内
に油を噴霧、または注入しながら圧縮成型するこ
とを特徴としたコルク摩擦材の成型方法。[Claims] 1. A method for molding a cork friction material in which cork particles are integrally molded via an adhesive and impregnated with oil,
When a mixture of cork grains and adhesive is put into the mold, foam sheets pre-impregnated with oil are placed on the top and bottom of the mold, or on either side, and molded. A method for molding a cork friction material characterized by supplying a desired amount of oil between cork grains while compressing and molding the foamed sheet in a mold, compressing and fixing the sheet and impregnating the cork with oil at the same time. 2. In a method for molding a cork friction material in which cork particles are integrally molded via an adhesive and impregnated with oil,
When a mixture of cork grains and adhesive is put into a mold, oil is sprayed or injected into the mold from multiple nozzles provided on the top and bottom of the mold, or on either side. A molding method for cork friction material characterized by compression molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170982A JPS5920607A (en) | 1982-07-27 | 1982-07-27 | Method of molding cork friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13170982A JPS5920607A (en) | 1982-07-27 | 1982-07-27 | Method of molding cork friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5920607A JPS5920607A (en) | 1984-02-02 |
| JPH0332442B2 true JPH0332442B2 (en) | 1991-05-13 |
Family
ID=15064359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13170982A Granted JPS5920607A (en) | 1982-07-27 | 1982-07-27 | Method of molding cork friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920607A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5441312A (en) * | 1977-09-05 | 1979-04-02 | Uchiyama Mfg | Production of cork for clutch facing and brake shoe |
-
1982
- 1982-07-27 JP JP13170982A patent/JPS5920607A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5920607A (en) | 1984-02-02 |
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