JPH02121814A - Molding method for rubber molded form with thin resin layer - Google Patents
Molding method for rubber molded form with thin resin layerInfo
- Publication number
- JPH02121814A JPH02121814A JP27476688A JP27476688A JPH02121814A JP H02121814 A JPH02121814 A JP H02121814A JP 27476688 A JP27476688 A JP 27476688A JP 27476688 A JP27476688 A JP 27476688A JP H02121814 A JPH02121814 A JP H02121814A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- rubber
- molded product
- layer
- insert
- 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
- 229920001971 elastomer Polymers 0.000 title claims abstract description 45
- 239000005060 rubber Substances 0.000 title claims abstract description 45
- 229920005989 resin Polymers 0.000 title claims abstract description 39
- 239000011347 resin Substances 0.000 title claims abstract description 39
- 238000000465 moulding Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims abstract description 54
- 239000000843 powder Substances 0.000 claims abstract description 26
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 13
- 238000011068 loading method Methods 0.000 claims abstract description 7
- 238000004073 vulcanization Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 238000000748 compression moulding Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、樹脂薄層を有するゴム成形品の成形方法に関
し、さらに詳しくは、非極性ゴム材料からなるゴム成形
品本体の表面側にオレフィン系樹脂薄層を具備し、前記
ゴム成形品の裏面側にインサートを具備するゴム成形品
を、ゴム材料を型密閉状態で装填可能な金型な使用して
成形する方法に関する。Detailed Description of the Invention <Industrial Application Field> The present invention relates to a method for molding a rubber molded product having a thin resin layer, and more specifically, the present invention relates to a method for molding a rubber molded product having a thin resin layer, and more specifically, an olefin is added to the surface side of a rubber molded product body made of a non-polar rubber material. The present invention relates to a method for molding a rubber molded product comprising a thin layer of a resin and an insert on the back side of the rubber molded product using a mold into which a rubber material can be loaded in a sealed state.
本発明の成形方法が適用可能なゴム製品としては、自動
車用ゴム部品である、ストラットバーリテーナ、バンバ
ゴム、パンバスブリング、スライド用ストッパゴム、ス
タビライザブツシュ、ストラットパークツション等を挙
げることかで幹る。Rubber products to which the molding method of the present invention can be applied include automotive rubber parts such as strut bar retainers, bumper rubber, bumper rings, slide stopper rubber, stabilizer bushes, strut park cushions, etc. Ru.
〈従来の技術〉
上記のような自動車ゴム製品は、相手部品との干渉時に
おける異音発生防止等の見地から、ゴム成形品の表面側
、すなわち干渉側に、ゴム弾性を阻害しない程度の硬質
の樹脂薄層（例えば超高分子量ポリエチレン）を具備さ
せることが検討されている（実開昭５９−１５５２１３
号公報等参照）。<Prior art> Automotive rubber products such as those mentioned above are made with a hard material on the surface side of the rubber molded product, that is, on the interference side, to the extent that it does not impede the rubber elasticity, in order to prevent abnormal noises from occurring when there is interference with other parts. It is being considered to provide a thin layer of resin (for example, ultra-high molecular weight polyethylene) (Utility Model Application Publication No. 59-155213).
(Refer to the publication number, etc.)
これらのゴム製品を成形する方法としては、ゴム材料を
型密閉状態で装填可能な金型の成形品表面側形成キャビ
ティ面に、樹脂粉末を所定厚に塗布して樹脂粉末層を形
成した後、インサートを金型にセットし、型密閉状態と
して、材料を装填し成形する方法が考えられる。なお、
ここで、樹脂粉末の代りに樹脂フィルムを使用すること
も考えられるが、通常、当該キャビティ面は、三次元曲
面を有するため望ましくない。The method for molding these rubber products is to apply resin powder to a predetermined thickness on the cavity surface of the molded product surface side of a mold into which the rubber material can be loaded in a sealed state, and then to form a resin powder layer. One possible method is to set the insert in a mold, seal the mold, and then charge the material and mold. In addition,
Here, it is possible to use a resin film instead of the resin powder, but this is usually undesirable because the cavity surface has a three-dimensional curved surface.
〈発明が解決しようとする課題〉
しかし上記方法の場合、型密閉状態でのゴム材料の装填
時において、装填材料の流動圧により、粉末樹脂層が部
分的に流動し、結果的に成形品に形成される樹脂薄層の
膜厚均一性が確保できず、表面（外観）不良がでやすか
った。<Problems to be Solved by the Invention> However, in the case of the above method, when loading the rubber material in a sealed mold state, the powder resin layer partially flows due to the fluid pressure of the charging material, resulting in the molded product being damaged. The thickness uniformity of the thin resin layer formed could not be ensured, and surface (appearance) defects were likely to occur.
本発明は、上記問題点を解決できる樹脂薄層を有するゴ
ム成形品の成形方法を提供することを目的とする。An object of the present invention is to provide a method for molding a rubber molded product having a thin resin layer that can solve the above problems.
〈課題を解決するための手段〉
本発明の樹脂薄層を有するゴム成形品の成形方法は、上
記ｙＡ題を解決するために、下記構成からなるものであ
る。<Means for Solving the Problems> The method of molding a rubber molded product having a thin resin layer according to the present invention has the following configuration in order to solve the above problem yA.
非極性ゴム材料からなるゴム成形品本体の表面側にオレ
フィン系樹脂薄層を具備し、前記ゴム成形品の裏面側に
インサートを具備するゴム成形品を、ゴム材料を型密閉
状態で装填可能な金型を使用して成形する方法であって
、
■前記金型の成形品表面側形成キャビティ面に、オレフ
ィン系樹脂粉末を所定厚に塗布して樹脂粉末層を形成し
た後、
■前記ｓ１脂粉末層の上に、型開放状態で第一次材料を
装填し、
■型閉時、第一次材料を圧縮する位置に配置されるよう
にインサートを金型にセットし、■型閉とし、型密閉状
態で第二次材料を装填して成形を行なう、
ことを特徴とする。A rubber molded product comprising a thin olefin resin layer on the front side of the rubber molded product body made of a non-polar rubber material and an insert on the back side of the rubber molded product can be loaded with the rubber material in a mold-sealed state. A molding method using a mold, comprising: (1) applying olefin resin powder to a predetermined thickness on the molded product surface side forming cavity surface of the mold to form a resin powder layer; Load the primary material onto the powder layer with the mold open; ■ Set the insert in the mold so that it is in a position to compress the primary material when the mold is closed; ■ Close the mold; The feature is that the secondary material is loaded and molded while the mold is sealed.
〈実施例〉
ここでは、第２図に示すような形状のゴム成形品（スト
ラットバーリテーナ）を成形する場合を例にとり説明す
るがこれに限られるものではない（１）上記ゴム成形品
は、非極性のゴム材料からなるゴム成形品本体１の表面
側にオレフィン系樹脂薄層３を具備し、前記ゴム成形品
の裏面側にインサート５を具備するものである。<Example> Here, the case of molding a rubber molded product (strut bar retainer) having the shape shown in Fig. 2 will be explained as an example, but the invention is not limited to this. (1) The above rubber molded product is A thin olefin resin layer 3 is provided on the front side of a rubber molded product main body 1 made of a polar rubber material, and an insert 5 is provided on the back side of the rubber molded product.
■ここで、ゴム材料を非極性としたのは、オレフィン系
樹脂との溶融接着の見地からである。■Here, the reason why the rubber material is made non-polar is from the viewpoint of melt adhesion with the olefin resin.
ここで、非極性ゴムとしては、エチレンプロピレンゴム
、スチレンブタジェンゴム、イソプレンゴム、ブタジェ
ンゴム、ブチルゴム等の合成ゴム、および天然ゴム等を
挙げることができる。Here, examples of the nonpolar rubber include synthetic rubbers such as ethylene propylene rubber, styrene butadiene rubber, isoprene rubber, butadiene rubber, and butyl rubber, and natural rubber.
■オレフィン系樹脂層としては、高密度ポリエチレン（
ＰＥ）、結晶性ポリプロピレン等の硬賀タイプを挙げる
ことができるが、低密度ポリエチレン等の軟質タイプで
あってもよい、特に、平均分子量（粘度法）が、１００
万〜ＳＯＯ万と一般の高密度ＰＥに比して格段に大きく
、耐摩耗性、自己潤滑性に優れている超高分子量ＰＥが
望ましい、また、樹脂層の厚みは、５０〜５００μｍと
する。■As the olefin resin layer, high-density polyethylene (
PE), crystalline polypropylene, etc., but soft types such as low-density polyethylene may also be used. In particular, those with an average molecular weight (viscosity method) of 100
Ultra-high molecular weight PE, which has a much larger density of 10,000 to SOO 10,000 than general high-density PE and has excellent wear resistance and self-lubricating properties, is desirable, and the thickness of the resin layer is 50 to 500 μm.
■インサートは５通常、スチール等の金属製とするが、
所要の剛性・耐熱性を有する材料なら特に限定されず、
耐熱性プラスチック、セラミック等であってもよい、イ
ンサートが極性材料の場合は、接着剤で接着剤処理をし
ておく。■The insert is usually made of metal such as steel, but
Any material is not particularly limited as long as it has the required rigidity and heat resistance.
If the insert is a polar material, which may be heat-resistant plastic, ceramic, etc., it should be adhesive-treated with an adhesive.
（２）上記ゴム成形品の金型は、材料を密閉状態で装填
可能な射出成形用または注入（トランスファ）成形用の
金型を使用する０図例では、注入成形用である。(2) The mold for the above-mentioned rubber molded product is for injection molding in the example shown in Fig. 0, which uses a mold for injection molding or transfer molding that can be filled with a material in a sealed state.
（３）次に９．上記材料・金型を使用しての成形方法を
説明する。(3) Next, 9. A molding method using the above materials and molds will be explained.
■金型すなわち下型１１の成形品表面側形成キャビティ
面１２に、オレフィン系樹脂粉末を所定厚に塗布して樹
脂粉末層１３を形成する（第１図Ａ）、ここで、樹脂粉
末の粒径は、樹脂層の厚みに対応して５０〜５００μ−
のもの使用し、塗布方法は、樹脂粉末を、そのまま、又
は、液状（サスペンション・エマルジョン）として、ス
プレー等により塗布する。■ Apply olefin resin powder to a predetermined thickness on the cavity surface 12 of the molded product surface side of the mold, that is, the lower mold 11, to form a resin powder layer 13 (Fig. 1A). The diameter is 50 to 500 μ- depending on the thickness of the resin layer.
The resin powder is applied as it is or as a liquid (suspension emulsion) by spraying or the like.
■前記樹脂粉末層１３の上に、型開放状態で、第一次材
料Ｍｌを装填する（第１図Ｂ）、この第一次材料は、通
常の圧縮成形用のゴム材料を使用すればよい。■ Load the primary material Ml onto the resin powder layer 13 with the mold open (Fig. 1B). This primary material may be a rubber material for ordinary compression molding. .
■型閉時、第一次材料Ｍｌを圧縮する位置に配置される
ようにインサート５を金型にセットする（第１図Ｃ）、
インサート５は、第一次材料Ｍｌの上に直接載置、すな
わち、下型１１にセットしてもよく、また、上型１６の
突起部１７等に電磁石等を使用してセットしてもよい。■Set the insert 5 in the mold so that it is placed in a position to compress the primary material Ml when the mold is closed (Fig. 1C),
The insert 5 may be placed directly on the primary material Ml, that is, set in the lower mold 11, or may be set on the protrusion 17 of the upper mold 16 using an electromagnet or the like. .
■型閉とし、型密閉状態で、第二状材料Ｍ２を装填して
成形を行なう（第１図Ｄ）。(2) Close the mold, and in the sealed state, charge the second material M2 and perform molding (FIG. 1D).
この型密閉状態で、樹脂粉末層１３は、インサート５を
介して圧縮力を受ける第一次材料Ｍｌにより、成形品表
面側形成キャビティ面１２に押圧されている。従って、
第二状材料Ｍ２がキャビティ内に注入されても、樹脂粉
末層１３は直接当該材料の流動の影響は受けず、しかも
加硫のための金型の加熱作用によって溶融し、均一な膜
厚の樹脂薄層が形成される。また、上記材料装填方法は
、射出の方が、注入（トランスファ）に比して、装填時
の材料熱含量が大きく、インサートの同時接着および成
形性（加硫時間の短縮）の見地から望ましい。In this mold-sealed state, the resin powder layer 13 is pressed against the formed cavity surface 12 on the surface side of the molded product by the primary material Ml which receives compressive force via the insert 5. Therefore,
Even when the second material M2 is injected into the cavity, the resin powder layer 13 is not directly affected by the flow of the material, and is melted by the heating action of the mold for vulcanization, resulting in a uniform film thickness. A thin resin layer is formed. In addition, among the above material loading methods, injection has a higher material heat content during loading than injection (transfer), and is preferable from the viewpoint of simultaneous adhesion of the insert and moldability (shortening of vulcanization time).
なお、上記実施例において、本発明の範囲外となるが、
ゴム成形品の樹脂薄層形成面がフラットな場合、樹脂粉
末の変りに樹脂フィルムを使用してもよい、また、イン
サートがない製品の場合は、圧縮成形だけで成形可能で
ある。In addition, in the above example, although it is outside the scope of the present invention,
If the thin resin layer forming surface of the rubber molded product is flat, a resin film may be used instead of resin powder, and if the product does not have an insert, it can be molded by compression molding alone.
〈発明の作用・効果〉
本発明の樹脂薄層を有するゴム成形品の成形方法は、上
記の如（、
■前記金型の成形品表面側形成キャビティ面に、オレフ
ィン系樹脂粉末を所定厚に塗布して樹脂粉末層を形成し
た後、
■前記樹脂粉末層の上に、型開放状態で第一次材料を装
填し、
■型閉時、第一次材料を圧縮する位置に配置されるよう
にインサートを金型にセットし、■型閉とし、型密閉状
態で第二次材料を装填して成形を行なう、
ことを特徴とする構成であるので、下記作用効果を奏す
る。<Operations and Effects of the Invention> The method for molding a rubber molded product having a thin resin layer according to the present invention is as described above (2) Applying olefin resin powder to a predetermined thickness on the molded product surface side forming cavity surface of the mold. After coating to form a resin powder layer, ■ Load the primary material onto the resin powder layer with the mold open, and ■ Place the primary material in a position to compress the primary material when the mold is closed. The insert is set in the mold, the mold is closed, and the secondary material is loaded and molded while the mold is in a sealed state.This structure is characterized by the following effects.
型密閉状態で、樹脂粉末層１３は、インサート５を介し
て圧縮力を受けている第一次材料Ｍｌにより、成形品表
面側形成キャビティ面１２に押圧されている。従って、
第二状材料Ｍ２がキャビティ内に注入されても、樹脂粉
末層１３は直接当該材料の流動の影響は受けず、しかも
加硫のための金型の加熱作用によって溶融し、均一な膜
厚の樹脂薄層が形成される。よって、従来の如く、成形
品の表面に、樹脂薄層不均一に基づく、表面不良が発生
するおそれがない。In the mold-sealed state, the resin powder layer 13 is pressed against the cavity surface 12 formed on the surface side of the molded product by the primary material Ml which is receiving compressive force through the insert 5. Therefore,
Even when the second material M2 is injected into the cavity, the resin powder layer 13 is not directly affected by the flow of the material, and is melted by the heating action of the mold for vulcanization, resulting in a uniform film thickness. A thin resin layer is formed. Therefore, there is no risk of surface defects occurring on the surface of the molded product due to non-uniformity of the thin resin layer, unlike in the prior art.
また、上記成形法は、圧縮成形に比して加硫効率が高く
、かつ、装填時の材料熱含量が大である射出又は注入を
、圧縮成形に併用するので、圧縮成形単独で成形しよう
とする場合に比して、生産性が良好であり、また、イン
サートとゴム基材との接着性も良好である。In addition, the above molding method uses injection or injection, which has a higher vulcanization efficiency than compression molding and has a large material heat content during loading, in combination with compression molding, so it is difficult to mold by compression molding alone. The productivity is better than the case where the insert is used, and the adhesion between the insert and the rubber base material is also good.
第１図Ａ−Ｄは本発明の成形方法の一例における各工程
を示す概略断面図、
第２図は第１図で成形した成形品の断面図（第３図のＩ
Ｉ −ＩＩ線部位）、
第３図は第２図の半平面図である。
１・・・ゴム成形品本体、
３・・・オレフィン系樹脂薄層、
５・・・インサート、
１１・・・下型（金型）
１２・・・成形品表面側形成キャビティ面、１３・・・
樹脂粉末層、
１６・・・上型（金型）、
Ｍｌ・・・第一次材料、
Ｍ２・・・第二次材料。
第
Ｉ５Ａ
第
図
第
図Figures 1A-D are schematic sectional views showing each step in an example of the molding method of the present invention, and Figure 2 is a sectional view of the molded product molded in Figure 1 (I in Figure 3).
3 is a half plan view of FIG. 2. DESCRIPTION OF SYMBOLS 1... Rubber molded product main body, 3... Olefin resin thin layer, 5... Insert, 11... Lower mold (mold) 12... Molded product surface side forming cavity surface, 13...・
Resin powder layer, 16... Upper mold (mold), Ml... Primary material, M2... Secondary material. I5A Figure Figure
Claims (1)
フィン系樹脂薄層を具備し、前記ゴム成形品の裏面側に
インサートを具備するゴム成形品を、ゴム材料を型密閉
状態で装填可能な金型を使用して成形する方法であつて
、 （１）前記金型の成形品表面側形成キャビティ面に、オ
レフィン系樹脂粉末を所定厚に塗布して樹脂粉末層を形
成した後、 （２）前記樹脂粉末層の上に、型開放状態で第一次材料
を装填し、 （３）型閉時、第一次材料を圧縮する位置に配置される
ようにインサートを金型にセットし、（４）型閉とし、
型密閉状態で第二次材料を装填して成形を行なう、 ことを特徴とする樹脂薄層を有するゴム成形品の成形方
法。[Scope of Claims] A rubber molded product comprising a thin olefin resin layer on the front side of a rubber molded product body made of a non-polar rubber material and an insert on the back side of the rubber molded product is made by molding the rubber material. A molding method using a mold that can be loaded in a closed state, the method comprising: (1) applying olefin resin powder to a predetermined thickness on the cavity surface of the molded product surface side of the mold to form a resin powder layer; After forming, (2) loading the primary material onto the resin powder layer with the mold open, and (3) placing the insert in a position to compress the primary material when the mold is closed. Set it in the mold, (4) close the mold,
A method for molding a rubber molded product having a thin resin layer, characterized in that the mold is filled with a secondary material and molded in a sealed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27476688A JPH02121814A (en) | 1988-10-31 | 1988-10-31 | Molding method for rubber molded form with thin resin layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27476688A JPH02121814A (en) | 1988-10-31 | 1988-10-31 | Molding method for rubber molded form with thin resin layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02121814A true JPH02121814A (en) | 1990-05-09 |
| JPH0558376B2 JPH0558376B2 (en) | 1993-08-26 |
Family
ID=17546278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27476688A Granted JPH02121814A (en) | 1988-10-31 | 1988-10-31 | Molding method for rubber molded form with thin resin layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02121814A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6004498A (en) * | 1994-04-04 | 1999-12-21 | Toyoda Gosei Co. Ltd. | Method for molding resin to skin members |
| US9677636B2 (en) | 2012-09-21 | 2017-06-13 | Sumitomo Riko Company Limited | Anti-vibration rubber member and production method thereof |
-
1988
- 1988-10-31 JP JP27476688A patent/JPH02121814A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6004498A (en) * | 1994-04-04 | 1999-12-21 | Toyoda Gosei Co. Ltd. | Method for molding resin to skin members |
| US9677636B2 (en) | 2012-09-21 | 2017-06-13 | Sumitomo Riko Company Limited | Anti-vibration rubber member and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0558376B2 (en) | 1993-08-26 |
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