JPH0357221B2 - - Google Patents
Info
- Publication number
- JPH0357221B2 JPH0357221B2 JP59107028A JP10702884A JPH0357221B2 JP H0357221 B2 JPH0357221 B2 JP H0357221B2 JP 59107028 A JP59107028 A JP 59107028A JP 10702884 A JP10702884 A JP 10702884A JP H0357221 B2 JPH0357221 B2 JP H0357221B2
- Authority
- JP
- Japan
- Prior art keywords
- molding
- mat
- fibrous
- resin compound
- compression molding
- 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
- 238000000465 moulding Methods 0.000 claims description 42
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 238000000748 compression moulding Methods 0.000 claims description 28
- 150000001875 compounds Chemical class 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 16
- 239000000047 product Substances 0.000 description 23
- 230000006835 compression Effects 0.000 description 10
- 238000007906 compression Methods 0.000 description 10
- 239000000835 fiber Substances 0.000 description 5
- 229920001187 thermosetting polymer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Nonwoven Fabrics (AREA)
Description
【発明の詳細な説明】
＜産業上の利用分野＞
本発明は繊維質系成型用マツトの成型方法に関
し、詳しくは、繊維質系成型用マツトと熱硬化性
樹脂を主成分とする如き樹脂コンパウンドとを同
時に熱圧縮成型することで、成型形状の複雑な部
分やリブあるいはボス形状等を有する成型品を良
好に成型する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 molding a fibrous molding mat, and more specifically, a method for molding a fibrous molding mat and a resin compound containing a thermosetting resin as a main component. The present invention relates to a method for successfully molding a molded product having a complicated molded shape, a rib or a boss shape, etc. by simultaneously performing hot compression molding.
＜従来の技術＞
繊維質系成型用マツトとしては、無機質系繊維
や有機質繊維を単体あるいは混合してなる繊維質
類に熱可塑性樹脂あるいは熱硬化性樹脂を混合し
てフエルト状にしたものを、加熱機で繊維間を熱
溶着させたり、ニードルパンチで繊維の交絡を強
化したものが知られている。このような繊維質系
成型用マツトを熱圧縮成型して得られる成型品
は、自動車内装部材、家電、建築、梱包部材とし
て用いられているが、繊維質系成型用マツトを、
例えば合成樹脂成型品のように、各部の板厚が極
端に異なるものに成型したり、また、ボスまたは
リブ状突出部あるいは深い溝等の凹形状部（以下
「異形状部分」という）を有する成型品に仕上る
ことは以下の理由によつて困難であるのが現状で
ある。つまり、一定の単位質量を有する繊維質系
成型用マツトを原反とし、これを熱圧縮成型して
成型品とする場合、その成型品に例えば異形状部
分があると、異形状部分がリブ又はボス形状部分
の場合には、その部分に繊維質系成型用マツトを
重ねたり、深い溝等の凹部の場合には同様のマツ
トを予めその凹部に対応する金型凹部に詰込む等
の前操作をしない限り成型品を均質に成型できな
い。更に、このような前操作をしたとしても熱圧
縮成型時には重ねたマツトに位置ズレが生じた
り、詰込んだマツト量の過不足が原因となつて、
成型品が部分的に破断したり不均質となる。この
ため、良質の成型品を安定して得ることが困難と
なるばかりか、マツトを重ねたり凹部にマツトを
詰込等の手間がかかるために作業能率が低下して
事実上大量生産には適用不可能である。<Prior art> A fibrous molding mat is a felt-like material made by mixing a thermoplastic resin or a thermosetting resin with a fibrous material made of inorganic fibers or organic fibers alone or in a mixture. It is known that the fibers are thermally welded using a heating machine or that the intertwining of the fibers is strengthened using a needle punch. Molded products obtained by thermal compression molding of such fibrous molding mats are used as automobile interior parts, home appliances, architecture, and packaging materials.
For example, a synthetic resin molded product may have extremely different plate thicknesses, or it may have a concave shape such as a boss, rib-like protrusion, or deep groove (hereinafter referred to as an "unusual-shaped part"). At present, it is difficult to finish it into a molded product due to the following reasons. In other words, when a fibrous molding mat having a certain unit mass is used as a raw material and is thermally compression molded to make a molded product, if the molded product has an irregularly shaped part, for example, the irregularly shaped part is a rib or In the case of a boss-shaped part, pre-operation such as overlaying a fibrous molding mat on the part, or in the case of a recess such as a deep groove, filling the mold recess corresponding to the recess with a similar mat in advance. The molded product cannot be molded homogeneously unless this is done. Furthermore, even if such pre-operation is carried out, the stacked mats may be misaligned during hot compression molding, or the amount of crammed mats may be too much or insufficient.
The molded product may partially break or become non-uniform. For this reason, not only is it difficult to stably obtain high-quality molded products, but work efficiency is reduced due to the time-consuming process of stacking mats and stuffing mats into recesses, making it practically unsuitable for mass production. It's impossible.
＜発明が解決すべき問題点＞
この発明は、繊維質系成型用マツトにおいて厚
さの異なつた部分や異形状部分を有する成型が実
用上不可能であつたという問題点を解決し、その
ような成型を実用的に可能とする成型方法を提供
することを目的とする。<Problems to be Solved by the Invention> This invention solves the problem that it is practically impossible to mold fibrous molding mats with parts of different thickness or irregular shapes, and The purpose of the present invention is to provide a molding method that allows practical molding.
＜問題点解決のための手段＞
この発明の繊維質系成型用マツトの成型方法
は、繊維質系成型用マツトを雄雌金型で熱圧縮成
型することで所定形状の成型品を形成する工程に
おいて、熱圧縮成型中には流動性を保持し且つ熱
圧縮成型完了時には硬化する性質を有する樹脂コ
ンパウンドを繊維質系成型用マツトと共に熱圧縮
成型して、成型品の厚さの異なつた部分や、ボス
またはリブ状突出部あるいは深い溝等の凹形状部
の如き異形状部分の、少なくとも一部分を該樹脂
コンパウンドで成型することを要旨とするもので
ある。<Means for Solving the Problems> The method for molding a fibrous molding mat of the present invention includes a step of forming a molded product of a predetermined shape by thermally compression molding a fibrous molding mat using male and female molds. In this method, a resin compound that maintains fluidity during hot compression molding and hardens when hot compression molding is completed is hot compression molded together with a fibrous molding mat to form parts of different thicknesses and parts of the molded product. The gist of the present invention is to mold at least a portion of an irregularly shaped portion such as a boss, a rib-like protrusion, or a concave portion such as a deep groove with the resin compound.
つまり、比較的嵩高で伸張性が少ないという欠
点をも繊維質系成型用マツトを熱圧縮成型するに
際して、熱圧縮成型中には流動性を持つと共に熱
圧縮成型完了時には硬化する性質の樹脂コンパウ
ンドを使用することにより、熱圧縮によつて粗密
となつたり破断して空隙となつた厚さの異なつた
部分や異形状部分に樹脂コンパウンドを流動させ
てそれらの粗密部や空隙部を補充填し、熱圧縮成
型後には繊維質形成用マツトの硬化と同時に樹脂
コンパウンドが硬化することにより、従来は困難
とされていた厚さの異なつた部分や異形状部分の
均一成型を行なうことが本発明のポイントであ
る。 In other words, when hot-compression molding a fibrous molding mat that has the disadvantages of being relatively bulky and having little extensibility, a resin compound that has fluidity during hot-compression molding and hardens when hot-compression molding is completed is used. When used, the resin compound is flowed into areas of different thickness and irregularly shaped areas that have become dense or dense due to thermal compression, or have broken and become voids, to supplement and fill those areas of density and voids. The key point of the present invention is that after hot compression molding, the resin compound hardens at the same time as the fiber-forming mat hardens, making it possible to uniformly mold parts of different thicknesses and irregularly shaped parts, which was previously considered difficult. It is.
＜実施例＞
第１図において１は雄型であつて、略中央部分
には膨出部２が形成されている。また３は雌型で
あつて、雄型１の膨出部２の形状に対応する形状
の凹部４を有すると共に、凹部４の底部には成型
品の環状リブ脚部を成型する部位である環状溝５
が設けられている。そして６は植物繊維等の繊維
に熱可塑性あるいは熱硬化性樹脂を混合してなる
繊維質系成型用マツト、また、７は次に詳述する
樹脂コンパウンドである。<Example> In FIG. 1, 1 is a male type, and a bulge 2 is formed approximately in the center. Further, reference numeral 3 is a female mold, which has a recess 4 having a shape corresponding to the shape of the bulging part 2 of the male mold 1, and the bottom of the recess 4 has an annular shape, which is a part where the annular rib leg of the molded product is formed. Groove 5
is provided. 6 is a fibrous molding mat made by mixing a thermoplastic or thermosetting resin with fibers such as vegetable fibers, and 7 is a resin compound which will be described in detail below.
上述した樹脂コンパウンド７としては、雄型１
と雌型３による熱圧縮成型中には流動性を有し、
且つ、熱圧縮成型完了時には硬化する性質を持つ
たものを用いる。即ち、繊維質系成型用マツト６
は熱圧縮成型進行と共に、混合された熱可塑性樹
脂や熱硬化性樹脂の働きにより漸次硬化しつつそ
の形状が成型されるものであり、熱圧縮成型完了
時には硬化も完了してるから、このような繊維質
系成型用マツト６と同時成型に供する樹脂コンパ
ウンドとしては所定の熱圧縮条件下において上記
性質を発現するものでなければならない。繊維質
系成型用マツト６の熱圧縮条件としては、一般的
には温度180〜200℃、圧縮圧力30〜40Kg／cm2、圧
縮時間１〜２分間の範囲で設定されるから、樹脂
コンパウンド７としては熱硬化性樹脂を主成分と
するものが好適である。樹脂コンパウンド７の一
例を示せば、不飽和ポリエステル樹脂やエポキシ
樹脂等の合成樹脂に無機質フイラーやガラス繊維
等を適宜な可塑剤や触媒と共に混練した粘土状樹
脂コンパウンドをシート状あるいはブロツク状に
したものである。 As the resin compound 7 mentioned above, the male mold 1
It has fluidity during hot compression molding with the female mold 3,
In addition, a material that has the property of hardening upon completion of hot compression molding is used. That is, fibrous molding mat 6
As the hot compression molding progresses, the shape is gradually hardened by the action of the mixed thermoplastic resin and thermosetting resin, and the hardening is completed when the hot compression molding is completed. The resin compound used for simultaneous molding with the fibrous molding mat 6 must exhibit the above-mentioned properties under predetermined thermal compression conditions. The thermal compression conditions for the fibrous molding mat 6 are generally set at a temperature of 180 to 200°C, a compression pressure of 30 to 40 Kg/cm 2 , and a compression time of 1 to 2 minutes. As the material, a material whose main component is a thermosetting resin is suitable. An example of the resin compound 7 is a clay-like resin compound made by kneading a synthetic resin such as an unsaturated polyester resin or an epoxy resin with an inorganic filler, glass fiber, etc. together with an appropriate plasticizer or catalyst, in the form of a sheet or block. It is.
第２図は、第１図に示した状態から雄型１と雌
型３とを嵌合させて熱圧縮成型した結果得られた
成型品で、繊維質系成型用マツトからなる圧縮成
型部８と樹脂コンパウドからなる圧縮成型部９と
から構成される。各部の寸法の一例を示せば、Ｔ
１〜Ｔ４はそれぞれ150mm、20mm、10mm、2.5mmで
ある。このような成型品を成型する方法の具体的
な実験例を示せば、雄型１と雌型３を上下に熱盤
を配したホツトプレスに設置し、雌型３の中央部
に成型品の環状リブ脚部の容積と同等量以上の不
飽和ポリエステル樹脂を主成分とするブロツク状
樹脂コンパウンドタイプの樹脂コンパウンド７を
置き、その上に木質繊維質の繊維質系成型用マツ
ト６を重ね置いて、金型表面温度180〜190℃、圧
縮圧力40Kg／cm2で１分間熱圧縮成型する。このよ
うな実験例により、第２図と同様の断面形状を有
し、圧縮成型部８と９とが強力に一体接着した成
型品が良好な成型状態で得られた。 FIG. 2 shows a molded product obtained as a result of heat compression molding by fitting the male die 1 and the female die 3 from the state shown in FIG. and a compression molding part 9 made of resin compound. An example of the dimensions of each part is T
1 to T4 are 150 mm, 20 mm, 10 mm, and 2.5 mm, respectively. To give a specific experimental example of a method for molding such a molded product, a male mold 1 and a female mold 3 are installed in a hot press with heating plates arranged above and below, and a circular shape of the molded product is placed in the center of the female mold 3. A block-shaped resin compound type resin compound 7 mainly composed of an unsaturated polyester resin in an amount equal to or more than the volume of the rib leg is placed, and a fibrous molding mat 6 made of wood fiber is placed on top of it. Hot compression molding is performed for 1 minute at a mold surface temperature of 180 to 190°C and a compression pressure of 40 kg/cm 2 . Through such experimental examples, a molded product having a cross-sectional shape similar to that shown in FIG. 2 and in which the compression molded parts 8 and 9 were strongly bonded together was obtained in a good molded state.
本発明の他の実施例を第３，４図によつて説明
する。この実施例の方法は、樹脂コンパウンド７
を繊維質系成型用マツト６の上面に置いた状態で
成型する点で上記した実施例と相違し、他の点で
は上記実施例と同じなので詳細な説明は省く。つ
まり、この方法においては樹脂コンパウンド７
を、雌型３の環状溝５に対応する位置である繊維
質系成型用マツト６の略中央部に置いた状態で雄
型１と雌型３とによる熱圧縮成型がなされる。そ
して、両金型が深く嵌合する過程において、繊維
質系成型用マツト６の環状溝５に圧接する個所が
破断し、破断個所から樹脂コンパウンド７が繊維
質系成型用マツト６と雌型３の凹部４との間に流
入して環状溝５は補充填され、熱圧縮成型完了時
には樹脂コンパウンド７が硬化することで、第４
図に示すような繊維質系成型用マツトからなる圧
縮成型部１０と樹脂コンパウンドからなる圧縮成
型部１１とから構成される成型品を得るのであ
る。この実施例の方法により、上記実験例と同様
の条件下による熱圧縮成型を行なつた所、圧縮成
型部１０と１１が強力に一体接着した成型品が良
好な状態で得られた。 Another embodiment of the present invention will be described with reference to FIGS. 3 and 4. The method of this example uses resin compound 7
This embodiment differs from the above-mentioned embodiment in that it is molded while being placed on the upper surface of the fibrous molding mat 6, but other points are the same as the above-mentioned embodiment, so a detailed explanation will be omitted. In other words, in this method, resin compound 7
is placed approximately in the center of the mat 6 for fibrous molding, which is a position corresponding to the annular groove 5 of the female mold 3, and hot compression molding is performed using the male mold 1 and the female mold 3. Then, in the process of deeply fitting the two molds together, the part of the fibrous molding mat 6 that comes into pressure contact with the annular groove 5 breaks, and the resin compound 7 is released from the fractured part into the fibrous molding mat 6 and the female mold 3. The annular groove 5 is supplemented by flowing between the recess 4 and the resin compound 7, which hardens when the heat compression molding is completed.
As shown in the figure, a molded product is obtained which is composed of a compression molding section 10 made of a fibrous molding mat and a compression molding section 11 made of a resin compound. When hot compression molding was carried out using the method of this example under the same conditions as in the above experimental example, a molded product in which the compression molded parts 10 and 11 were strongly bonded together was obtained in good condition.
＜発明の効果＞
この発明の成型方法は、繊維質系成型用マツト
と共に上記性質の樹脂コンパウンドを熱圧縮成型
することで、成型用マツト単体ではマツト破断や
マツト量が粗密になる部分に樹脂コンパウンドを
流動、補充填させて成型を行なうものであるか
ら、従来は成型が不可能であつた厚さの異なつた
部分や異形状部分を良好かつ均一に成型でき、従
つて、このような形状を持つ成型品を良質に成型
することができるという優れた効果を有する。そ
して、樹脂コンパウンドとして成型完了時には硬
化するものを用いており、厚さの異なつた部分や
異形状部分を成型品の他の部分と同時に成型完了
することができ、よつて、成型品全体の形成を同
時且つ一工程で行なえるという利点を有するか
ら、安価に大量生産するには好適な成型方法とい
える。<Effects of the Invention> The molding method of the present invention involves thermal compression molding of a resin compound having the above properties together with a fibrous molding mat, so that when the molding mat alone is used, the resin compound is applied to areas where the mat breaks or the amount of mat becomes coarse and dense. Since molding is performed by flowing and refilling, it is possible to mold parts of different thicknesses and irregularly shaped parts, which were previously impossible to mold, well and uniformly. It has the excellent effect of being able to mold molded products of high quality. A resin compound that hardens upon completion of molding is used, and parts of different thickness or irregular shapes can be molded at the same time as other parts of the molded product, thus making it possible to form the entire molded product. Since it has the advantage of being able to perform both simultaneously and in one step, it can be said to be a suitable molding method for mass production at low cost.
第１図はこの発明の実施例を示した断面図、第
２図は実施例により成型された成型品を示した断
面図、第３図は他の実施例を示した断面図、第４
図は他の実施例により成型された成型品を示した
断面図である。
１……雄型、３……雌型、６……繊維質系成型
用マツト、７……樹脂コンパウンド、８，９，１
０，１１……圧縮成型部。
FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a molded product molded according to the embodiment, FIG. 3 is a sectional view showing another embodiment, and FIG.
The figure is a sectional view showing a molded product molded according to another embodiment. 1... Male mold, 3... Female mold, 6... Mat for fibrous molding, 7... Resin compound, 8, 9, 1
0,11...Compression molding part.
Claims (1)
型することで所定形状の成型品を形成する工程に
おいて、熱圧縮成型中には流動性を保持し且つ熱
圧縮成型完了時には硬化する性質を有する樹脂コ
ンパウンドを繊維質系成型用マツトと共に熱圧縮
成型して、成型品の厚さの異なつた部分や、ボス
またはリブ状突出部あるいは深い溝等の凹形状部
の如き異形状部分の、少なくとも一部分を該樹脂
コンパウンドで成型することを特徴とする繊維質
系成型用マツトの成型方法。1. In the process of forming a molded product of a predetermined shape by heat compression molding fibrous molding mat with male and female molds, the property maintains fluidity during heat compression molding and hardens upon completion of heat compression molding. By hot compression molding a resin compound with a fibrous molding mat together with a fibrous molding mat, molded parts can be formed into parts with different thicknesses, bosses, rib-like protrusions, or concave parts such as deep grooves. A method for molding a fibrous molding mat, comprising molding at least a portion of the resin compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107028A JPS60252758A (en) | 1984-05-26 | 1984-05-26 | Molding of fibrous yarn molding mat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59107028A JPS60252758A (en) | 1984-05-26 | 1984-05-26 | Molding of fibrous yarn molding mat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60252758A JPS60252758A (en) | 1985-12-13 |
| JPH0357221B2 true JPH0357221B2 (en) | 1991-08-30 |
Family
ID=14448682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59107028A Granted JPS60252758A (en) | 1984-05-26 | 1984-05-26 | Molding of fibrous yarn molding mat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60252758A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3780928T2 (en) * | 1986-12-19 | 1992-12-24 | Takeda Chemical Industries Ltd | METHOD FOR MOLDING FIBER REINFORCED PLASTICS. |
-
1984
- 1984-05-26 JP JP59107028A patent/JPS60252758A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60252758A (en) | 1985-12-13 |
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