JPS6122914A - Integral molding method of synthetic resin and fibrous sheet - Google Patents
Integral molding method of synthetic resin and fibrous sheetInfo
- Publication number
- JPS6122914A JPS6122914A JP59143830A JP14383084A JPS6122914A JP S6122914 A JPS6122914 A JP S6122914A JP 59143830 A JP59143830 A JP 59143830A JP 14383084 A JP14383084 A JP 14383084A JP S6122914 A JPS6122914 A JP S6122914A
- Authority
- JP
- Japan
- Prior art keywords
- synthetic resin
- mold
- resin
- force
- fibrous sheet
- 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.)
- Pending
Links
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
(イ)発明の目的
〔産業上の利用分野〕
本発明は接着剤等を用いることなく、合成樹脂の表面に
紙や布等の繊維質シートを一体成形する方法に関し、ひ
いては強固に接合されたこの種成形品を得ることを目的
とするものである。[Detailed description of the invention] (a) Purpose of the invention [Field of industrial application] The present invention relates to a method for integrally molding a fibrous sheet such as paper or cloth on the surface of a synthetic resin without using adhesives or the like. The object of this invention is to obtain a molded product of this type that is firmly joined.
合成樹脂の表面に他のシートを接合させるには予じめ成
形、製造された合成樹脂成形品に接着剤を用いて接合す
るのが普通であるが、非常に手間がかかり、またポリエ
チレン、ポリプロピレンのような樹脂の場合には強い接
着強度をうろことが困難であった。In order to join other sheets to the surface of synthetic resin, it is common to use adhesives to join pre-formed and manufactured synthetic resin molded products, but this is very time-consuming and does not work well with polyethylene, polypropylene, etc. In the case of resins such as, it was difficult to obtain strong adhesive strength.
しかしその後射出成形法等の進歩により合成樹脂膜等の
接合にはインサート法と称し例えば持分[133−31
80号公報に示すような一体成形法が行なわれるように
なった。However, with the advancement of injection molding and other techniques, the insert method is used to join synthetic resin films, for example, [133-31
An integral molding method as shown in Japanese Patent No. 80 has come into use.
この方法は、彩飾図形成は文字等を上面に印刷した透明
な熱可塑性合成樹脂膜を雌型の内底面に上向に密装し、
次に該雌金型と雄金型とを閉じた摂水冷下に該雌雄金型
間に熱可塑性合成樹脂の溶M&+4料を圧入して一体成
形するものである。In this method, to form a decorative pattern, a transparent thermoplastic synthetic resin film with letters, etc. printed on the upper surface is tightly sealed upward on the inner bottom surface of the female mold.
Next, the female mold and the male mold are closed, and a molten M&+4 material of a thermoplastic synthetic resin is press-fitted between the male and female molds while cooling with water to perform integral molding.
〔発明が解決しようとする問題点)
以上の如く合成樹脂フィルムやシートについては既に射
出インサート成形法が知られているので圧入の段階で破
れたりしわができるという欠点があり、また横開き型の
場合型内でのこのシートの位置決めが仲々旨くいかず、
少なくとも手数がかかり、紙や布の場合には必ずしもこ
の方法は成功しているとはいえなかった。[Problems to be Solved by the Invention] As mentioned above, the injection insert molding method is already known for synthetic resin films and sheets, but it has the drawback of tearing and wrinkles during the press-fitting stage, and the side-opening type. In some cases, the positioning of this sheet within the mold did not go well.
At the very least, this method was time-consuming and was not always successful in the case of paper or cloth.
本発明における解決しようとする問題点はまさにこの点
にあり、本発明者らは種々検討の結果このような欠点を
なくし、比較的強度の弱い紙や布でも破れヤしわが出な
い新しい一体成形法を開発し本発明に至ったものである
。This is precisely the problem that the present invention aims to solve, and as a result of various studies, the inventors of the present invention have solved this problem and created a new integral molding that does not tear or wrinkle even with relatively weak paper or cloth. The present invention was achieved by developing a method.
(0)発明の構成
〔問題点を解決するための手段〕
本発明の1つは上記欠点を改善するため、予じめ繊維質
シートを下型内に置き、その上に可塑化状態の合成樹脂
を載せた後上型を閉じて加圧一体成形するものであり、
他は型の外でI[貿シー1〜の上に可塑化状態の合成樹
脂を載せたものを下型内に持ち込み、上型を閉じて同じ
く加圧一体成形するものである。(0) Structure of the Invention [Means for Solving the Problems] One of the present inventions is, in order to improve the above-mentioned drawbacks, to place a fibrous sheet in advance in a lower mold, and to synthesize a plasticized sheet onto it. After placing the resin, the upper mold is closed and molded under pressure.
In the other method, plasticized synthetic resin is placed on top of the plasticized resin outside the mold, which is then brought into the lower mold, the upper mold is closed, and the same molding is carried out under pressure.
合成樹脂としては、ポリプロピレン、ポリエチレン、A
BS、ナイロン、ポリスチレン、アクリル樹脂等の熱可
塑性のものを使用することができるが特にこの方法はポ
リプロピレンやポリエ、チレン等接着剤で接着し難い樹
脂の場合に用いて効果的なことはいうまでもない。これ
らの合成樹脂には必要に応じガラス繊維、タルク、マイ
カ等の充填剤を加えることも可能である。Synthetic resins include polypropylene, polyethylene, A
Thermoplastic materials such as BS, nylon, polystyrene, and acrylic resin can be used, but it goes without saying that this method is particularly effective for resins that are difficult to bond with adhesives, such as polypropylene, polyethylene, and tyrene. Nor. It is also possible to add fillers such as glass fiber, talc, mica, etc. to these synthetic resins, if necessary.
繊維質シートとしては紙や布示代表的なものであるが不
繊布等も含まれ、繊維の材質としては天然繊維、合成繊
維いずれでも良い。特に強度、剛性が低く、従来法では
扱い難い破れ易く、しわがJ:ってしまうものに用いて
有用である。繊維質シートに合成樹脂を載せる工程は押
出機を用いるのが良くこれを行なうときの条件は例えば
ポリプロピレンを用いる場合樹脂加熱温度は150〜2
40℃で通常の射出成形の場合に比べて低くて良いし、
父型を閉じるときの圧力も50 kQ/ 0112−1
000 ko/cm2の範囲で可能である。Examples of the fibrous sheet include paper and textiles, but also nonwoven fabrics, and the material of the fibers may be either natural fibers or synthetic fibers. It is particularly useful for items that have low strength and rigidity, are difficult to handle using conventional methods, are easily torn, and have wrinkles. It is best to use an extruder for the step of placing synthetic resin on the fibrous sheet, and the conditions for doing this are, for example, when using polypropylene, the resin heating temperature is 150-250°C.
The temperature at 40℃ is lower than that of normal injection molding, and
The pressure when closing the mold is also 50 kQ/0112-1
It is possible in the range of 000 ko/cm2.
更に型外で合成樹脂を載せる方法は一定個所で押出機の
押出ノズルから樹脂を供給するのであるが搬送にはベル
トコンベア外極々の手段が採られる。そして型温度のコ
ントロールは、型までの距離等を考慮して行なう。Furthermore, in the method of placing the synthetic resin outside the mold, the resin is supplied from an extrusion nozzle of an extruder at a fixed location, but the method of conveying the resin is outside the mold using a belt conveyor. The mold temperature is controlled by taking into account the distance to the mold, etc.
以上の方法を図面によって更に説明すると、まず第4図
に示すような下型4bの内底面に紙又は缶等一体化すべ
き繊維質シート2をこの上に位置決めをして置き、押出
機の押出ノズルを型上に向かわせ可塑化状態の合成樹脂
1をその上に載せる。To further explain the above method using drawings, first, the fibrous sheet 2 to be integrated with paper or cans, etc. is positioned and placed on the inner bottom surface of a lower mold 4b as shown in FIG. The nozzle is directed onto the mold and the plasticized synthetic resin 1 is placed thereon.
この工程は押出ノズルの位置を動かしながら行なうこと
もできる(第6図、第7図参照)。次いで上型4aを閉
じて第5図のように加圧成形する。This step can also be carried out while moving the position of the extrusion nozzle (see FIGS. 6 and 7). Next, the upper mold 4a is closed and pressure molding is performed as shown in FIG.
型の加熱冷却固化は合成樹脂の種類、臀ようとする成形
品の形状等を考慮して決定する。The heating and cooling method for solidifying the mold is determined by taking into account the type of synthetic resin, the shape of the molded product, etc.
以上は紙又は布が合成樹脂の片側にのみついている場合
について説明したが、可塑化状態の合成樹脂の上に更に
紙や布を置いて両面につけることも可能である。この場
合は上型4aの内側に紙や布を型締め迄の間を予じめ保
持する方法も用いることができる。Although the case where the paper or cloth is attached to only one side of the synthetic resin has been described above, it is also possible to further place paper or cloth on the plasticized synthetic resin and attach it to both sides. In this case, it is also possible to use a method in which paper or cloth is previously held inside the upper mold 4a until the mold is clamped.
なお平面形状の製品を例にとって説明したが、本発明は
これに限定されるものではなく凸凹のある(1魚形状の
製品の成形にも勿論利用できる。Although the explanation has been given using a flat product as an example, the present invention is not limited to this, and can of course also be used for molding a fish-shaped product.
次に型外でIl維質シートの上に可塑化状態の合成樹脂
を戦局りる方法は第8図に示すようにコンベアベルト7
上の一定個所から押出機5によって行われる。操作は樹
脂の載置時間と型の開閉時間を一致させ間欠的にスムー
スに進行させることが可能である。Next, the method of applying the plasticized synthetic resin onto the Il fibrous sheet outside the mold is as shown in Fig. 8, using the conveyor belt 7.
This is carried out by an extruder 5 from a certain point above. The operation can be carried out smoothly intermittently by matching the resin placement time with the mold opening/closing time.
かくして得られる製品の剥離強度はポリプロピレンと和
紙を一体化させる場合、通常370〜560g/amで
ある。The peel strength of the product thus obtained is usually 370 to 560 g/am when polypropylene and Japanese paper are integrated.
本発明の実施例を示すと次のとおりである。 Examples of the present invention are as follows.
実施例1
縦230111111、横98ml1及び厚さ0.05
mmの和紙を第4図の下型内底面に置き、その上にマイ
カ40%含むポリプロピレン樹脂を押出機のノズルより
押出し第5図に示すように圧力220に!7/cm(型
締力50T) 、型温度30度で加圧成形し冷却(20
秒)固化させ一体成形品を得た。この製品の樹脂と和紙
の間の剥離強度を測定したところ420111/C−の
値が得られた。Example 1 Length 230111111, width 98ml1 and thickness 0.05
A piece of washi paper (mm) was placed on the inner bottom surface of the lower mold as shown in Figure 4, and a polypropylene resin containing 40% mica was extruded from the nozzle of the extruder on top of it to a pressure of 220 as shown in Figure 5! 7/cm (mold clamping force 50T), pressure molded at a mold temperature of 30 degrees and cooled (20
sec) It was solidified to obtain an integrally molded product. When the peel strength between the resin and Japanese paper of this product was measured, a value of 420111/C- was obtained.
実施例2
縦230a+m、ll98+u及びM[さ0.05gv
(D和紙をコンベアベルト上に供給し、間欠的に移動さ
せながら、一定個所から押出機により可塑化された40
%のマイカ入りポリプロピレン樹脂をその上に載置し次
いで一枚ずつ開放された下型上に搬送し、上型を閉じて
加圧成形(圧力220 ko/cm2 (縮型締力50
=T)、型温度30’C)L、、冷却、固化して一体成
形品を得た。Example 2 Length 230a+m, ll98+u and M [length 0.05gv
(D Washi was fed onto a conveyor belt, and while being moved intermittently, 40 sheets of Japanese paper were plasticized by an extruder from a certain point.
% of mica-containing polypropylene resin was placed thereon, and then the sheets were transferred one by one onto the open lower mold, the upper mold was closed, and pressure molded (pressure: 220 ko/cm2 (molding mold clamping force: 50
=T), mold temperature 30'C)L, and was cooled and solidified to obtain an integrally molded product.
この製品の樹脂−和紙間の剥離強度は480o/cmで
あった。The peel strength between the resin and Japanese paper of this product was 480 o/cm.
(ハ)発明の効果
本発明は以上に説明したような構成を採ることにより、
勿論繊維質シートの中に合成樹脂が浸み込み強固な接合
が得られるのではあるが、特に比較的強度や剛性の低い
紙や布でも射出成形の場合と違って加圧成形の際には樹
脂の流動する力が弱いので、破れたり、しわがよったり
することが少ないという利点がある。(c) Effects of the invention By adopting the configuration described above, the present invention has the following effects:
Of course, the synthetic resin permeates into the fibrous sheet and provides a strong bond, but unlike injection molding, it is difficult to pressurize paper or cloth, which has relatively low strength and rigidity. Since the resin has a weak flowing force, it has the advantage of being less likely to tear or wrinkle.
また$111質シートに合成樹脂を載せてから型内に持
ち込む方法の発明については、型内で合成樹脂を冷却固
化している閣に型外での操作を並行して進めることがで
きるので、成形時間の短縮化が図れ、従うに型の数を増
やす必要もなくなる。In addition, regarding the invention of a method for placing synthetic resin on a $111 sheet and then bringing it into the mold, operations outside the mold can be carried out in parallel to the cooling and solidification of the synthetic resin inside the mold. Molding time can be shortened, and there is no need to increase the number of molds.
そして、繊維質シートが強固に接合されたこの種合成樹
脂製品が得られることにより、更にこの繊維質シート面
を利用して従来接合の困難であった他のシート等との接
合、5uiiも容易になる点でも極めて有用である。By obtaining this kind of synthetic resin product in which the fibrous sheet is firmly joined, it is also easier to use the surface of the fibrous sheet to join other sheets, etc., which was difficult to join in the past. It is also extremely useful.
第1図は、本発明による一体成形品を示す斜視図、
第2図は従来の成形品を示す斜視図′
第3図ないし第5因は、本発明の成形法を順次説明する
だめの工程図であって、第3図は型締前にvan質シー
トの金型(下型)への載置状態を示し、第4図はその上
に更に合成樹脂を載置する段階を、更に第5図は型締時
の状態を夫々示す断面図、
第6図、第7図は金型への合成樹脂の供給を示す工゛程
図で第6図は供給中を、第7図は供給後の状態を示す断
面図、
第8図は、型外で合成樹脂を供給する場合の一例を示す
図である。
1・・・合成m1L2−・・繊維質シート、3・・・接
着剤、4・・・金型(4a・・・上型、4b・・・下型
)、5・・・押出機、6・・・ベルトコンベア。Fig. 1 is a perspective view showing an integrally molded product according to the present invention; Fig. 2 is a perspective view showing a conventional molded product; Figs. FIG. 3 shows the state in which the van quality sheet is placed on the mold (lower mold) before mold clamping, and FIG. 4 shows the step of further placing synthetic resin thereon. Figure 5 is a cross-sectional view showing the state during mold clamping, Figures 6 and 7 are process diagrams showing the supply of synthetic resin to the mold, Figure 6 is during supply, and Figure 7 is during supply. FIG. 8 is a cross-sectional view showing the subsequent state. FIG. 8 is a diagram showing an example of a case where synthetic resin is supplied outside the mold. 1... Synthetic m1L2-... Fibrous sheet, 3... Adhesive, 4... Mold (4a... Upper mold, 4b... Lower mold), 5... Extruder, 6 ···belt conveyor.
Claims (2)
化状態の合成樹脂を載せ、上型を閉じて加圧成形するこ
とを特徴とする合成樹脂と繊維質シートとの一体成形法
。(1) Integration of a synthetic resin and a fibrous sheet characterized by placing a plasticized synthetic resin on a fibrous sheet placed in advance in a lower mold, closing the upper mold, and press-molding. Molding method.
せた後下型内に置き、上型を閉じて加圧成形することを
特徴とする合成樹脂と繊維質シートとの一体成形法。(2) A method of integrally molding a synthetic resin and a fibrous sheet, which is characterized by placing a plasticized synthetic resin on the fibrous sheet, placing it in a lower mold, closing the upper mold, and performing pressure molding. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59143830A JPS6122914A (en) | 1984-07-11 | 1984-07-11 | Integral molding method of synthetic resin and fibrous sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59143830A JPS6122914A (en) | 1984-07-11 | 1984-07-11 | Integral molding method of synthetic resin and fibrous sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6122914A true JPS6122914A (en) | 1986-01-31 |
Family
ID=15347936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59143830A Pending JPS6122914A (en) | 1984-07-11 | 1984-07-11 | Integral molding method of synthetic resin and fibrous sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6122914A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6392423A (en) * | 1987-09-18 | 1988-04-22 | Puramatsuku Kk | Composite molding and molding method thereof |
WO1988008364A1 (en) * | 1987-04-30 | 1988-11-03 | Sumitomo Chemical Company, Limited | Method of manufacturing multi-layer molded products |
US4994226A (en) * | 1986-11-22 | 1991-02-19 | Nippondenso Co., Ltd. | Method of producing synthetic resin made articles having porous elastic member |
JP2009529445A (en) * | 2006-03-14 | 2009-08-20 | ペーパー テクノロジーズ エス.アール.エル. | Compression molded fluff cellulose material |
DE102019218896A1 (en) * | 2019-12-04 | 2021-06-10 | Guangdong Yizumi Precision Machinery Co., Ltd. | Process for the production of a 2-component component as well as an injection molding machine and extruder |
-
1984
- 1984-07-11 JP JP59143830A patent/JPS6122914A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4994226A (en) * | 1986-11-22 | 1991-02-19 | Nippondenso Co., Ltd. | Method of producing synthetic resin made articles having porous elastic member |
WO1988008364A1 (en) * | 1987-04-30 | 1988-11-03 | Sumitomo Chemical Company, Limited | Method of manufacturing multi-layer molded products |
US5053179A (en) * | 1987-04-30 | 1991-10-01 | Sumitomo Chemical Company, Limited | Process for producing a multilayer molded article |
GB2214860B (en) * | 1987-04-30 | 1991-11-20 | Sumitomo Chemical Co | Method of manufacturing multi-layer molded products |
JPS6392423A (en) * | 1987-09-18 | 1988-04-22 | Puramatsuku Kk | Composite molding and molding method thereof |
JP2009529445A (en) * | 2006-03-14 | 2009-08-20 | ペーパー テクノロジーズ エス.アール.エル. | Compression molded fluff cellulose material |
DE102019218896A1 (en) * | 2019-12-04 | 2021-06-10 | Guangdong Yizumi Precision Machinery Co., Ltd. | Process for the production of a 2-component component as well as an injection molding machine and extruder |
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