JPH08207021A - Manufacture of synthetic resin board with grain pattern - Google Patents
Manufacture of synthetic resin board with grain patternInfo
- Publication number
- JPH08207021A JPH08207021A JP7018108A JP1810895A JPH08207021A JP H08207021 A JPH08207021 A JP H08207021A JP 7018108 A JP7018108 A JP 7018108A JP 1810895 A JP1810895 A JP 1810895A JP H08207021 A JPH08207021 A JP H08207021A
- Authority
- JP
- Japan
- Prior art keywords
- grain pattern
- synthetic resin
- die
- wood
- resin plate
- 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
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、各種建築用材料等に
使用される木目模様を有する熱可塑性合成樹脂板の製造
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a thermoplastic synthetic resin plate having a wood grain pattern used for various building materials and the like.
【0002】[0002]
【従来の技術】木目模様を有する合成樹脂板の簡易な製
造方法として、たとえば特公平3−59804号公報に
示されるように、適宜木粉を混入した熱可塑性樹脂から
なる成形用樹脂材料を、サーキュラーダイ(丸形ダイ)
により一旦チューブ状に押出し成形したのち、これを押
出方向に切り開き、平板状に展開することによって板状
材料とする方法が公知である。2. Description of the Related Art As a simple method for producing a synthetic resin plate having a wood grain pattern, for example, as disclosed in Japanese Patent Publication No. 3-59804, a molding resin material made of a thermoplastic resin mixed with wood powder is used. Circular die (round die)
There is known a method in which the material is once extruded into a tube shape by means of, and then cut open in the extruding direction and expanded into a plate shape to obtain a plate-shaped material.
【0003】しかしながら、かかる製造方法において
は、固有の重大な1つの問題点があった。即ち、サーキ
ュラーダイは、ダイ外殻内に周方向に数個以上のスパイ
ダー部を介してトピードないしマンドレルを中吊状態に
連結支持したものであり、該トピードの外面とダイ外殻
の内面との間に環状の樹脂流路を形成し、その先端のダ
イスリット部に向けて成形用樹脂材料を送り出すもので
ある。このため、環状流路内で樹脂材料はスパイダー部
により一旦分流され、その後に再び合流されて融着一体
化されるが、この融着線の部分が引張りや曲げ等の機械
的強度上の弱点部分として周方向の複数個所に残存す
る。そのため、押出チューブを展開して得た合成樹脂板
においても、上記強度上の弱点部分が幅方向の複数個所
において長さ方向に連続する形で内在したものとなり、
該合成樹脂板を真空成形あるいは圧空成形等の熱成形に
供した場合、熱成形時に破断を生じるおそれがある点で
ある。具体的には、例えば成形倍率3倍の熱成形に耐え
ることができず、用法用途の制約を受ける難点があっ
た。However, there is one serious problem inherent in such a manufacturing method. That is, the circular die is one in which a topeed or mandrel is connected and supported in a suspended state in the die outer shell in the circumferential direction via several or more spider parts, and the outer surface of the topeed and the inner surface of the die outer shell are An annular resin flow path is formed between them, and the molding resin material is sent out toward the die slit portion at the tip thereof. For this reason, the resin material is once split by the spider portion in the annular flow path, and then merged again to be fused and integrated. However, this fusion line portion is weak in mechanical strength such as tension and bending. It remains as a part at a plurality of positions in the circumferential direction. Therefore, even in the synthetic resin plate obtained by expanding the extruded tube, the weak points on the strength are inherently present in a form continuous in the length direction at a plurality of positions in the width direction,
This is because when the synthetic resin plate is subjected to thermoforming such as vacuum forming or pressure forming, breakage may occur during thermoforming. Specifically, for example, it is not possible to endure thermoforming with a molding ratio of 3 times, and there is a problem that it is restricted by usage.
【0004】一方、上記のような押出し展開法による合
成樹脂板の製造において、その表面に天然木材に近似し
た木目模様を付与する方法についても、従来種々検討さ
れている。その1つの有力な方法として、特公平3−5
9803号公報に示されるように、押出機のサーキュラ
ーダイの樹脂出口の部分に流路を横断する複数個のブリ
ッジ部を設けたものとし、このブリッジ部で樹脂の流れ
が妨げられることを利用して、展開板材の表面に板目模
様を付与せしめたものとする方法が提案されている。On the other hand, in the production of a synthetic resin plate by the above-mentioned extrusion development method, various methods have been conventionally studied for imparting a wood grain pattern similar to natural wood on the surface thereof. As one of the influential methods, Japanese Patent Fair 3-5
As disclosed in Japanese Patent Publication No. 9803, a plurality of bridge portions that cross a flow path are provided at a resin outlet portion of a circular die of an extruder, and the fact that the resin flow is obstructed by the bridge portions is utilized. As a result, a method has been proposed in which a developed plate material is provided with a grain pattern on its surface.
【0005】しかしながら、この方法においては、前述
のスパイダーによる強度上の問題点と同様の理由から、
それ以上に強度上の弱点部分が多数個所に残存し、熱成
形加工性はもとより、平板状のままでの使用においても
実用上支障を生じるものでしかなかった。加えて、上記
提案方法では、表面肌が悪いものとなると共に、実際
上、木目模様の中でも板目柄の模様しか良好に付与する
ことができず、外観上好適視される柾目柄の模様を付与
することは困難であった。However, in this method, for the same reason as the strength problem due to the spider described above,
Further, many weak points in strength remained in many places, and it was a problem in practical use not only in thermoforming processability but also in use as a flat plate. In addition, in the above-mentioned proposed method, the surface skin becomes poor, and in practice, only the pattern of the grain pattern can be favorably given among the grain patterns, and the pattern of the grain pattern that is suitable for appearance is provided. It was difficult to give.
【0006】これに対し、本出願人は、先の出願に係る
特願平6−40186号により、成形用樹脂材料として
木目模様を付与するためのブラウン系等の着色材粒子を
混入したものを用いるものとすると共に、押出し用の丸
形ダイス内の環状樹脂通路の内周面または外周面の一部
に、凹凸状の表面摩擦手段を設けたものとし、樹脂材料
の表面に流動摩擦抵抗を与えることにより、成形物の表
面に前記着色材料の押出し方向に配向された模様をあら
わし、柾目柄を付与せしめるものとする方法を提案し
た。On the other hand, the applicant of the present invention discloses that, in accordance with Japanese Patent Application No. 6-40186 of the previous application, a colorant particle such as brown color for imparting a wood grain pattern is mixed as a molding resin material. In addition to the one used, a part of the inner peripheral surface or the outer peripheral surface of the annular resin passage in the round die for extrusion is provided with uneven surface friction means, and the flow friction resistance is applied to the surface of the resin material. A method has been proposed in which a pattern oriented in the extrusion direction of the coloring material is displayed on the surface of the molded product by giving it to give a grain pattern.
【0007】上記の先行提案方法は、所期する柾目模様
の付与効果において十分に満足しうるものであったが、
更に次のような問題点を有することが遺憾とされるとこ
ろであった。The above-mentioned prior proposed method was sufficiently satisfactory in the desired effect of imparting a grain pattern,
It was regrettable that it had the following problems.
【0008】即ち、上記の方法によって形成される柾目
模様は、人工木材の表層部分のみにおいて、深さ0.1
〜0.2mm程度の極く浅い範囲に形成されているにすぎ
ない。このため、用途によって人工木材の表面を研磨し
あるいは切削したような場合、柾目模様が簡単に消失し
てしまうおそれがあるという点である。That is, the grain pattern formed by the above method has a depth of 0.1 at only the surface layer of the artificial wood.
It is only formed in an extremely shallow range of about 0.2 mm. Therefore, if the surface of the artificial wood is polished or cut depending on the application, the grain pattern may easily disappear.
【0009】[0009]
【発明が解決しようとする課題】この発明は、上記のよ
うな技術的背景の中で、押出展開法による合成樹脂板の
製造方法において、その板幅方向の全体の中に相対的な
強度上の弱点部分を残存せしめないものとすること、そ
してまた、そのことを前提とした中で板面に深さのある
程度深いところまで美麗な木目模様を付与し、板面の研
磨加工等によっても容易に消失することのない木目模様
を有するものとすること、更にまた、木目模様を天然木
材に近似した変化のあるものにしたり、外観の良好な柾
目柄に形成するなどの選択の自由性のあるものとするこ
と、以上の諸要請に満足を与えうる木目模様を有する合
成樹脂板の製造方法を提供することを目的とする。In view of the above technical background, the present invention is a method for manufacturing a synthetic resin plate by an extrusion expansion method, and in terms of relative strength in the entire width direction thereof. The weak point part of the is not allowed to remain, and on the premise of that, a beautiful grain pattern is given to the plate surface to a certain depth and it is easy to polish the plate surface etc. Have a wood grain pattern that does not disappear, and there is also the freedom of choice such as making the wood grain pattern change similar to natural wood or forming a grain pattern with a good appearance. It is an object of the present invention to provide a method for manufacturing a synthetic resin plate having a wood grain pattern that can satisfy the above requirements.
【0010】[0010]
【課題を解決するための手段】上記の目的において、こ
の発明の基本とするところは、木目模様を付与するため
の着色材を混入した成形用樹脂材料を、サーキュラーダ
イを備えた押出機により所定直径のチューブ状に押出し
成形したのち、該押出チューブを円周方向の一個所で押
出方向に切開しかつ展開して平板状の合成樹脂板を得る
方法において、前記サーキュラーダイとして、トピード
をその周方向の一個所において1つのスパイダー部によ
り外殻に連結支持したダイを用い、当該ダイから押出さ
れたチューブを、前記スパイダー部による樹脂融着線に
沿って、当該融着線またはその近傍位置において切開す
ることを特徴とする木目模様を有する合成樹脂板の製造
方法を要旨とする。In view of the above-mentioned object, the basic point of the present invention is that a molding resin material mixed with a coloring material for imparting a wood grain pattern is formed by an extruder equipped with a circular die. After extruding into a tubular shape of diameter, the extruded tube is incised in one direction in the circumferential direction in the extrusion direction and expanded to obtain a flat synthetic resin plate. Using a die connected and supported to the outer shell by one spider portion at one point in the direction, a tube extruded from the die is along the resin fusion line by the spider portion at the fusion line or a position in the vicinity thereof. The gist is a method of manufacturing a synthetic resin plate having a wood grain pattern, which is characterized by making an incision.
【0011】そして又、製品の合成樹脂板の表面に深さ
の深い良好な木目模様を付与するための付加手段とし
て、サーキュラーダイ内の環状樹脂流路内に押出方向の
中間部において外周面側または内周面側から内方に突出
した多数個のフィンないし突起を有する抵抗部材を備え
たダイを用い、前記フィンないし突起による成形用樹脂
材料中の着色材の展伸配向により、押出チューブの内外
面の少なくともいずれか一方に木目模様を付与せしめた
ものとすることが提案される。Further, as an additional means for imparting a good wood grain pattern with a deep depth to the surface of the synthetic resin plate of the product, the outer peripheral surface side at the intermediate portion in the extrusion direction in the annular resin flow channel in the circular die. Alternatively, by using a die equipped with a resistance member having a large number of fins or projections protruding inward from the inner peripheral surface side, the extruded tube can be formed by the stretched orientation of the coloring material in the molding resin material by the fins or projections. It is proposed that at least one of the inner and outer surfaces has a wood grain pattern.
【0012】更に、上記木目模様をより外観上好ましい
柾目模様のものに形成するためには、前記フィンないし
突起をピッチ1〜30mmの密な配置に設けるものとする
手段が採用される。Further, in order to form the wood grain pattern into a grain pattern having a more preferable appearance, means for providing the fins or protrusions in a dense arrangement with a pitch of 1 to 30 mm is adopted.
【0013】更にまた、合成樹脂板を人工木材として天
然木材に近似した加工性と外観を付与するために、成形
用材料として、熱可塑性合成樹脂に前記着色材料ととも
に、樹脂100重量部に対し木粉10〜100重量部を
添加配合したものを用いることが推奨される。Furthermore, in order to give a workability and appearance similar to natural wood using synthetic resin plate as artificial wood, thermoplastic synthetic resin is used as a molding material together with the coloring material, and wood per 100 parts by weight of resin is used. It is recommended to use an additive compound of 10 to 100 parts by weight of powder.
【0014】以下、この発明の構成を更に添附図面の参
照のもとに詳しく説明する。The structure of the present invention will be described in detail below with reference to the accompanying drawings.
【0015】[0015]
【発明の細部構成と作用】先ず、この発明に用いる成形
用樹脂材料は、熱可塑性合成樹脂に好ましくは木粉を混
入した配合物をベース材料とし、これに木目模様を形成
するためのブラウン系等の着色材を配合したものであ
る。Detailed structure and function of the invention First, the molding resin material used in the present invention is based on a blend of thermoplastic synthetic resin, preferably wood powder, as a base material, and a brown system for forming a wood grain pattern on the base material. It is a mixture of colorants such as.
【0016】上記熱可塑性樹脂としては、特に限定され
るものではないが、具体的には例えばポリ塩化ビニル樹
脂(PVC)、アクリロニトリル・ブタジエン・スチレ
ン共重合体樹脂(ABS)、ポリスチレン樹脂(P
S)、ポリプロピレン樹脂(PP)等が用いられる。ま
た、木粉は、粒径80〜300メッシュ、含水率1〜5
%程度のものが好適に用いられる。その配合量は前記熱
可塑性樹脂100重量部に対し木粉10〜100重量部
程度とするのが好適であり、特に30〜70重量部とす
るのが好ましい。The thermoplastic resin is not particularly limited, but specifically, for example, polyvinyl chloride resin (PVC), acrylonitrile / butadiene / styrene copolymer resin (ABS), polystyrene resin (P).
S), polypropylene resin (PP), etc. are used. Further, the wood powder has a particle size of 80 to 300 mesh and a water content of 1 to 5
% Is preferably used. The blending amount is preferably about 10 to 100 parts by weight of wood powder, and particularly preferably 30 to 70 parts by weight with respect to 100 parts by weight of the thermoplastic resin.
【0017】着色材は、上記樹脂と木粉との混合物から
なるベース材料よりも濃色に着色された熱可塑性樹脂粉
末あるいはペレットからなるものであり、もとよりベー
ス材料の樹脂と良好な相溶性を有する同質のものを用い
るのが好ましい。ブラウン系着色材の一例として、例え
ばセントラル硝子株式会社製の「WR−PVC、W−3
2C、H244」(商品名)を好適物として挙示するこ
とができる。着色材の配合割合は、前記ベース材料10
0重量部に対し、2〜6重量部、特に好ましくは3〜5
重量部程度とすることにより好結果を得ることができ
る。The colorant is composed of a thermoplastic resin powder or pellets colored in a darker color than the base material made of a mixture of the above resin and wood powder, and has a good compatibility with the resin of the base material. It is preferable to use the same one that has. As an example of the brown colorant, for example, "WR-PVC, W-3 manufactured by Central Glass Co., Ltd.
2C, H244 ”(trade name) can be listed as a suitable item. The mixing ratio of the coloring material is 10
0 to 6 parts by weight, particularly preferably 3 to 5 parts by weight
Good results can be obtained by adjusting the amount to about parts by weight.
【0018】この発明による合成樹脂板の製造は、上記
のような成形用樹脂材料を用い、図1に示すようにサー
キュラーダイ(2)を装備した押出機(1)により、一
旦チューブ状に押出したのち、この押出しチューブ(1
0)をダイスの出口近くの位置において切断刃(3)に
より円周方向の一部において切断し、これを展開状態に
開いて平板状の合成樹脂板(P)に成形するものであ
る。展開したのち、内部に残留する応力歪を除去するた
め、更に熱ロールに通して安定化させる補整処理を施す
ものとすることが望ましい。The synthetic resin plate according to the present invention is manufactured by using the above-mentioned molding resin material and once extruding it into a tubular shape by an extruder (1) equipped with a circular die (2) as shown in FIG. After that, this extruded tube (1
0) is cut in a part in the circumferential direction by a cutting blade (3) at a position near the exit of the die, and is opened in a developed state to form a flat synthetic resin plate (P). After the expansion, it is desirable to further pass through a hot roll to carry out a stabilizing treatment in order to remove the stress strain remaining inside.
【0019】上記のような押出成形に際し、この発明は
サーキュラーダイ(2)として、図1及び図3に示すよ
うに、トピード(7)をその周方向の一個所で1つのス
パイダー部(5)によりダイ外殻(6)に連結支持した
ダイを用いるものとする。In the extrusion molding as described above, according to the present invention, as a circular die (2), as shown in FIGS. 1 and 3, a topeed (7) is provided with one spider portion (5) at one position in the circumferential direction. A die connected and supported by the die outer shell (6) is used.
【0020】即ち、外輪部(4a)と内輪部(4b)を
それぞれダイ外殻(6)及びトピード(7)に結合固定
したスパイダーリング(4)の環状流路用開口部(8)
内に、周方向の一個所においてのみブリッジ状のスパイ
ダー部(5)を設けたものとする。該スパイダー部
(5)は、樹脂の流れをなるべく妨げないように流線形
断面をもつように形成することが好ましい。またトピー
ド(7)の支持力を十分に確保するために、図示の状態
よりトピードの長さ方向に更に一層長いものに形成して
も良い。That is, the annular flow path opening (8) of the spider ring (4) in which the outer ring portion (4a) and the inner ring portion (4b) are fixedly connected to the die outer shell (6) and the toepeed (7), respectively.
A bridge-shaped spider portion (5) is provided in only one portion in the circumferential direction. The spider part (5) is preferably formed to have a streamlined cross section so as not to disturb the flow of the resin as much as possible. Further, in order to secure a sufficient supporting force for the topede (7), it may be formed to be much longer than the illustrated state in the longitudinal direction of the topede.
【0021】このようにスパイダー部(5)をダイ内の
環状流路(9)の周方向の一個所のみに設けたものとす
ることにより、押出し成形されるチューブ(10)は、周
方向の一個所のみに上記スパイダー部(5)の存在に基
づく樹脂融着線を保有するものとなる。そこで、切断刃
(3)をスパイダー部(5)の対応位置に配置し、上記
融着線の部分に沿って、押出チューブを該融着線上また
はその近傍位置にて切断し、展開することにより、製品
となる合成樹脂板(P)は、その幅方向の全体に強度分
布の均整なものとすることができる。即ち、強度上の弱
点部分となる融着線部は、樹脂板の両側辺ないし両側縁
部に位置されることになり、強度上遜色のない樹脂板
(P)を得ることができるものである。As described above, by providing the spider portion (5) only at one position in the circumferential direction of the annular flow passage (9) in the die, the extruded tube (10) can be formed in the circumferential direction. The resin fusion bonding wire based on the existence of the spider part (5) is held only in one place. Therefore, by disposing the cutting blade (3) at a position corresponding to the spider portion (5), and cutting the extruded tube along the fusion line at or near the fusion line and expanding it. The synthetic resin plate (P) to be the product can have a uniform strength distribution in the entire width direction. That is, the fusion-bonding line portions, which are the weak points in strength, are located on both sides or both edges of the resin plate, and a resin plate (P) comparable in strength can be obtained. .
【0022】次に、該樹脂板(P)に任意の木目模様を
付与する手段として、本発明に使用するサーキュラーダ
イ(2)は更に1つまたは2つ以上のリング状抵抗部材
(11)(12)を装備したものとする。Next, the circular die (2) used in the present invention as means for imparting an arbitrary wood grain pattern to the resin plate (P) further comprises one or more ring-shaped resistance members (11) ( 12) is equipped.
【0023】リング状抵抗部材の1つ(11)は、押出チ
ューブ(10)の内面側に木目模様を付与すべくトピード
(7)側に付設装備されたものであり、他方のリング状
抵抗部材(12)は、押出チューブ(10)の外面側に木目
模様を付与すべくダイ外殻(6)側に付設装備されたも
のである。いずれも、樹脂流路(9)の流れ方向におい
てスパイダーリング(4)の下流側に隣接して配置され
ているが、この位置に限定されるものではない。スパイ
ダーリング(4)の上流側に配置されても良いし、下流
側に離れて配置されても良い。しかしながら、トピード
(7)とダイ外殻(6)との間の環状樹脂流路(9)中
において、その先端のダイスリット(9a)部分より上
流側の中間領域部分に配置することが必要である。ダイ
スリット(9a)部分に設けるときは、抵抗部材(11)
(12)による掻き傷の影響が板面に強く残り、成形され
る樹脂板(P)の表面肌が悪いものとなると共に、機械
的強度の点でも弱いものとなるおそれがある。One of the ring-shaped resistance members (11) is attached to the topede (7) side so as to give a grain pattern to the inner surface side of the extruded tube (10), and the other ring-shaped resistance member. (12) is attached to the die outer shell (6) side so as to give a wood grain pattern to the outer surface side of the extruded tube (10). Both are arranged adjacent to the downstream side of the spider ring (4) in the flow direction of the resin flow channel (9), but are not limited to this position. It may be arranged on the upstream side of the spider ring (4) or may be arranged separately on the downstream side. However, in the annular resin flow channel (9) between the topede (7) and the die outer shell (6), it is necessary to arrange it in the intermediate region portion upstream of the die slit (9a) portion at the tip thereof. is there. When provided in the die slit (9a) part, the resistance member (11)
The influence of scratches due to (12) remains strong on the plate surface, and the surface texture of the resin plate (P) to be molded may be poor, and the mechanical strength may be weak.
【0024】ところで、トピード(7)側の内側抵抗部
材(11)は、図示例においては板目模様を付与するため
のものとして形成されたもので、図5に示すように外周
面上にピッチ30〜100mm程度の等間隔または不等間
隔に、環状樹脂流路(9)内に突出した多数個の抵抗用
突起(13)を有する。図示において、抵抗用突起(13)
は、樹脂流路(9)の間隔ないし流路幅に対し、高さ2
0〜80%、好ましくは30〜50%程度で、厚さ1〜
5mm、好ましくは2〜3mm程度の平板状に形成すること
が好ましいが、円柱状、角柱状、三角形断面のピラミッ
ド状、針状等、他の形状のものに形成しても良い。By the way, the inner resistance member (11) on the side of the topede (7) is formed as a plate pattern in the illustrated example, and has a pitch on the outer peripheral surface as shown in FIG. A large number of resistance projections (13) protruding into the annular resin flow channel (9) are provided at equal or unequal intervals of about 30 to 100 mm. In the figure, the projection for resistance (13)
Is the height 2 with respect to the space or width of the resin flow path (9).
0 to 80%, preferably about 30 to 50%, and thickness 1 to
It is preferably formed in a flat plate shape of about 5 mm, preferably about 2 to 3 mm, but may be formed in other shapes such as a cylindrical shape, a prismatic shape, a pyramid shape having a triangular cross section, and a needle shape.
【0025】抵抗用突起(13)は、環状樹脂流路(9)
内を流れる樹脂材料に流れ抵抗を与え、隣接する突起
(13)(13)間の部分で相対的に樹脂材料の流れが早く
なる結果、隣接する両突起間の部分において板面に着色
材の展伸配向による図6(b)に示すような板目状模様
(P1 )を付与するものである。従って、隣接する抵抗
突起(13)(13)間の間隔を周方向において不等間隔に
設定することにより、樹脂板(P)の幅方向に変化のあ
る板目模様を付与することが可能となり、一層天然木材
の有する板目模様に近似した模様を形成せしめることが
できる。The resistance projection (13) is provided with an annular resin flow path (9).
Flow resistance is given to the resin material flowing inside, and the flow of resin material becomes relatively faster in the area between adjacent protrusions (13) (13). The stretched orientation imparts a grain pattern (P1) as shown in FIG. 6 (b). Therefore, by setting the intervals between the adjacent resistance protrusions (13) (13) to be unequal in the circumferential direction, it becomes possible to impart a cross-shaped pattern that changes in the width direction of the resin plate (P). Further, it is possible to form a pattern more similar to the grain pattern of natural wood.
【0026】また、抵抗用突起(13)はそのピッチを小
さくすればするほど、付与する模様を柾目模様に近いも
のに変化させることができる。Further, the smaller the pitch of the resistance protrusions (13), the more the pattern to be applied can be changed to a pattern close to a grain pattern.
【0027】このことから、他方のダイ外殻(6)側の
外側抵抗部材(12)は、図示例において柾目模様を付与
するためのものとして形成されたものであり、内周面上
にピッチ1〜30mm、好ましくは3〜15mmの間隔で、
先細の断面三角形状のフィン(14)として多数個突設さ
れたものとなされている。このフィン(14)の高さは、
樹脂流路(9)の間隔に対して20〜90%、好ましく
は40〜60%程度の範囲に形成されるものである。Therefore, the outer resistance member (12) on the side of the other die outer shell (6) is formed as a grain pattern in the illustrated example, and has a pitch on the inner peripheral surface. At intervals of 1 to 30 mm, preferably 3 to 15 mm,
A large number of fins (14) having a tapered triangular cross section are projected. The height of this fin (14) is
It is formed in the range of 20 to 90%, preferably 40 to 60% with respect to the interval of the resin flow channel (9).
【0028】フィンピッチは、板面に与える木目模様の
態様を定めるものであり、30mmをこえるピッチとする
ときは、もはや柾目模様の外観を呈するものとならず、
それ以下のピッチに設定すべきである。一方、1mm未満
のピッチにするときは、フィンに所要の強度を付与する
ことができず、あるいはフィンの高さが低いものとなる
ために、深さの深い領域にまで柾目模様を付与すること
ができない。好ましくはピッチ3〜15mm程度に設定す
るのが良い。The fin pitch defines the mode of the wood grain pattern given to the plate surface, and when the pitch exceeds 30 mm, the appearance of the grain pattern is no longer exhibited,
It should be set to a pitch less than that. On the other hand, when the pitch is less than 1 mm, it is not possible to give the required strength to the fins, or the fins have a low height. I can't. It is preferable to set the pitch to about 3 to 15 mm.
【0029】環状樹脂流路(9)内を流れる樹脂材料
は、その外周面が上記フィン(14)によって流れ抵抗を
受け、材料中に含まれる着色材が細かいピッチで流れ方
向に筋状に展伸配向される結果、樹脂板の板面に図6
(a)に示すような天然木材に近似した柾目模様(P2
)が付与されるものである。The outer peripheral surface of the resin material flowing in the annular resin flow channel (9) is subjected to the flow resistance by the fins (14), and the coloring material contained in the material is linearly spread at a fine pitch in the flow direction. As a result of being stretched and oriented, as shown in FIG.
Grain pattern similar to natural wood as shown in (a) (P2
) Is given.
【0030】上記図示実施例においては、内外に種類の
異なる2つの抵抗部材(11)(12)を対向状に配置した
例を示したが、板目模様付与用あるいは柾目模様付与用
の同一種類の2つの抵抗部材を配置したものとしても良
い。また2つの抵抗部材(11)(12)を樹脂材料の流れ
方向に設置場所を変えて配置しても良い。更には内外い
ずれか一方の抵抗部材のみを配設し、樹脂板(P)の片
面のみに板目模様(P1 )あるいは柾目模様(P2 )を
付与せしめるものとしても良い。In the illustrated embodiment, two resistance members (11) and (12) of different types are arranged inside and outside so as to face each other. However, the same type for imparting a grain pattern or a grain pattern is provided. The two resistance members may be arranged. Further, the two resistance members (11) and (12) may be arranged at different places in the flow direction of the resin material. Further, only one of the inner and outer resistance members may be provided so that the resin plate (P) is provided with the grain pattern (P1) or the grain pattern (P2) only on one surface.
【0031】[0031]
【実施例】成形用樹脂材料として、ポリ塩化ビニル樹脂
100重量部と、平均粒径100μmの乾燥木粉30重
量部との混合物からなるベース材料100重量部に対
し、ブラウン系着色材(セントラル硝子株式会社製「W
R−PVC」)4重量部を混合したものを用いた。EXAMPLE As a molding resin material, 100 parts by weight of a polyvinyl chloride resin and 30 parts by weight of a dry wood powder having an average particle size of 100 μm were mixed with 100 parts by weight of a base material, and a brown colorant (central glass) was used. Co., Ltd. "W
R-PVC ") 4 parts by weight were mixed.
【0032】一方、押出機として、口径55mm、L/D
=18の2軸型押出機を用い、これにサーキュラーダイ
(2)を装備した。On the other hand, as an extruder, the bore diameter is 55 mm, L / D
= 18 twin-screw extruder was used and equipped with a circular die (2).
【0033】サーキュラーダイ(2)は、図1に示すよ
うに1つのスパイダー部(5)を備えたスパイダーリン
グ(4)によってトピード(7)を周方向の一個所で支
持したものとし、スパイダー部(5)の対応位置におい
て樹脂出口の前方至近位置に切断刃(3)を設けたもの
とした。また、ダイ(2)の環状ダイスリット(9d)
は直径380mm、スリット幅3.0mmとし、環状樹脂流
路(9)の中間部領域部分の流路幅は10mmとした。As shown in FIG. 1, the circular die (2) has a spider ring (4) provided with one spider portion (5) to support the topede (7) at one position in the circumferential direction. At the position corresponding to (5), the cutting blade (3) was provided at a position close to the front of the resin outlet. Also, the annular die slit (9d) of the die (2)
Had a diameter of 380 mm and a slit width of 3.0 mm, and the flow path width of the intermediate region of the annular resin flow path (9) was 10 mm.
【0034】一方、スパイダーリング(4)の後方に隣
接して内外2つの抵抗部材(11)(12)を配設したもの
とした。一方の内側抵抗部材(11)は、周方向の内面に
ピッチ30〜60mmの不等間隔に複数個の抵抗用突起
(高さ3mm、厚さ2mm、長さ3mm)(13)を設けたもの
とし、他方の外側抵抗部材(12)は内面の周方向に、ピ
ッチ3.5mmの間隔で多数個の先細三角形断面のフィン
(高さ8mm、基端部厚さ1.92mm、長さ3mm)(14)
を設けたものとした。On the other hand, two resistance members (11) (12) inside and outside are arranged adjacent to the rear of the spider ring (4). One inner resistance member (11) has a plurality of resistance projections (height 3 mm, thickness 2 mm, length 3 mm) (13) provided on the inner surface in the circumferential direction at unequal intervals with a pitch of 30 to 60 mm. The other outer resistance member (12) has a large number of fins having a tapered triangular cross section at a pitch of 3.5 mm in the circumferential direction of the inner surface (height 8 mm, base end thickness 1.92 mm, length 3 mm). (14)
Is provided.
【0035】そして、前記樹脂材料を上記押出機(1)
により、直径380mm、肉厚3mmのチューブ(10)に押
出成形した。ここに、押出条件は、押出機のホッパー部
分の温度170℃、シリンダー(1a)の出口部分の温
度175℃、スクリュー(1b)の温度170℃、アダ
プター(15)の温度175℃、サーキュラーダイ(2)
の温度180℃、スクリューの回転速度20rpm に設定
した。Then, the resin material is passed through the extruder (1).
With this, a tube (10) having a diameter of 380 mm and a wall thickness of 3 mm was extrusion-molded. The extrusion conditions are as follows: the temperature of the hopper of the extruder is 170 ° C., the temperature of the outlet of the cylinder (1a) is 175 ° C., the temperature of the screw (1b) is 170 ° C., the temperature of the adapter (15) is 175 ° C., and the circular die ( 2)
The temperature was 180 ° C. and the screw rotation speed was 20 rpm.
【0036】次いで、サーキュラーダイ(2)から押出
された成形チューブ(10)を、ダイス出口近傍に設けた
切断刃(3)によりスパイダー部(5)に対応する位置
の周方向の一箇所で切り開き、シート状に展開したの
ち、放冷硬化させて幅1050mm、厚さ3mmの平板状の
合成樹脂板製品を得た。Next, the molded tube (10) extruded from the circular die (2) is cut open at one position in the circumferential direction at a position corresponding to the spider part (5) by a cutting blade (3) provided near the die exit. After being developed into a sheet, it was allowed to cool and cure to obtain a flat synthetic resin plate product having a width of 1050 mm and a thickness of 3 mm.
【0037】この合成樹脂板(P)は、図2及び図6に
示すように押出チューブ(10)の外面による表面におい
て天然木材に近似した美麗な柾目模様(P2 )を有し、
押出チューブ(10)の内面による裏面に板幅方向に不等
間隔に並んだ板目模様(P1)を有するものであった。As shown in FIGS. 2 and 6, the synthetic resin plate (P) has a beautiful grain pattern (P2) similar to natural wood on the surface of the extruded tube (10), which is similar to natural wood.
The extruded tube (10) had the inner surface of the back surface having a grain pattern (P1) arranged at unequal intervals in the sheet width direction.
【0038】そこで、この合成樹脂板材(P)の表面及
び裏面のそれぞれについて、1.0mmの深さまで平均に
研磨したところ、いずれの面においてもそれぞれ柾目模
様(P2 )及び板目模様(P1 )が消失することなく美
麗な状態に残存するものであった。Then, when the front surface and the back surface of this synthetic resin plate material (P) were respectively ground to a depth of 1.0 mm on average, a grain pattern (P2) and a plate pattern (P1) were formed on each surface. Remained in a beautiful state without disappearing.
【0039】次に、上記合成樹脂板(P)を供試材とし
て、真空・圧空併用による熱成形を行ったところ、成形
倍率3倍の熱成形においてなお供試材は破断を生じるこ
となく、熱成形性の良好なものであることを確認し得
た。ちなみに、周方向に6個のスパイダーを有する常用
のサーキュラーダイを用いて上記実施例と同様の条件で
成形した合成樹脂板においては、成形倍率3倍の熱成形
を行うと、成形時にスパイダーマーク部に相当する融着
線部において板材に破れを生じるものであった。Next, when the above-mentioned synthetic resin plate (P) was used as a test material, thermoforming was carried out in combination with vacuum and air pressure. When the thermoforming was carried out at a molding ratio of 3 times, the test material was not broken. It was confirmed that the thermoformability was good. By the way, in a synthetic resin plate molded under the same conditions as in the above embodiment using a conventional circular die having six spiders in the circumferential direction, when thermoforming was performed at a molding ratio of 3 times, the spider mark portion was formed at the time of molding. The plate material was torn at the fused line portion corresponding to.
【0040】[0040]
【発明の効果】請求項1によるこの発明においては、木
目模様を有する合成樹脂板の押出展開法による製造にお
いて、使用するサーキュラーダイのトピードを、周方向
に1個所のスパイダー部のみによって支持したものとし
たことにより、押出チューブにおいてその周方向の1個
所のみに強度上の弱点となる融着線が生じるにすぎな
い。しかもこの融着線に沿って当該融着線部を切開し、
展開して平板状の合成樹脂板とするものであるから、該
樹脂板は幅方向において相対的な機械的強度上の弱点と
なる部分が存在しないものとなり、ひいては従来製法に
よるものに較べて一層強度上優れたものであって、熱成
形性の良好な用途範囲に制約を受けない合成樹脂板を得
ることができる。According to the present invention as set forth in claim 1, in the production of a synthetic resin plate having a wood grain pattern by the extrusion expansion method, the tope of the circular die used is supported by only one spider portion in the circumferential direction. As a result, in the extruded tube, a fusion line, which is a weak point in strength, occurs only at one position in the circumferential direction. Moreover, the fusion line portion is incised along the fusion line,
Since it is developed into a flat plate-shaped synthetic resin plate, the resin plate does not have a portion which is a weak point in relative mechanical strength in the width direction, and further, compared with the conventional manufacturing method. It is possible to obtain a synthetic resin plate which is excellent in strength and has good thermoformability and is not restricted by the application range.
【0041】また、請求項2の木目模様付段を用いた場
合においては、合成樹脂板の表面に、板目状あるいは柾
目状の木目模様を、板面の比較的深い位置にまで有する
合成樹脂板を得ることができる。しかも、サーキュラー
ダイ内の環状樹脂流路の中間部領域内で樹脂材料の表面
部にフィンないし抵抗用突起で抵抗を与えることによっ
て上記木目模様を付与するものであるから、ダイスリッ
トから出てきた時点においては押出チューブの表面肌は
良好な状態に修復されたものとなり、外観上及び強度上
良好な合成樹脂板を得ることができる。Further, in the case of using the step with a wood pattern according to claim 2, a synthetic resin having a grain-like or grain-like grain pattern on the surface of the synthetic resin plate to a relatively deep position of the plate surface. The board can be obtained. Moreover, since the wood grain pattern is imparted by imparting resistance to the surface portion of the resin material with fins or resistance projections in the intermediate portion region of the annular resin flow path in the circular die, it comes out from the die slit. At this point, the surface texture of the extruded tube has been restored to a good state, and a synthetic resin plate having good appearance and strength can be obtained.
【0042】更に、請求項3においては、合成樹脂板の
板面に、外観上好ましい柾目模様を付与したものとする
ことができると共に、該柾目模様は表面研磨等によって
も消失することのないものとすることができる。Further, in claim 3, the synthetic resin plate may be provided with a grain pattern which is preferable in appearance, and the grain pattern does not disappear even by surface polishing or the like. Can be
【0043】更にまた請求項4においては、切断、切削
等の木材と同様の良好な加工性を有し、かつ木肌に近似
した外観風合を有する人工木材としての使用適性に一段
と優れた合成樹脂板を得ることができる。Further, in claim 4, a synthetic resin having good workability similar to wood such as cutting and cutting, and having further excellent suitability for use as artificial wood having an appearance and texture similar to that of wood skin. The board can be obtained.
【図1】この発明の実施に用いるサーキュラーダイを備
えた押出機の概略縦断面図である。FIG. 1 is a schematic vertical sectional view of an extruder equipped with a circular die used for carrying out the present invention.
【図2】押出チューブを切り開いて板状に展開する態様
を示した斜視図である。FIG. 2 is a perspective view showing a mode in which an extruded tube is cut open and developed into a plate shape.
【図3】図1の III−III 線の断面図である。3 is a sectional view taken along line III-III in FIG.
【図4】図1のIV−IV線によってトピードを上面方向か
ら見た一部断面平面図である。FIG. 4 is a partial cross-sectional plan view of the topeed from the top surface direction taken along line IV-IV of FIG.
【図5】図1のV−V線の断面図である。5 is a cross-sectional view taken along line VV of FIG.
【図6】製造される合成樹脂板の両面の模様態様を示す
ものであって、(a)は表面図、(b)は裏面図であ
る。6A and 6B show patterns on both sides of a synthetic resin plate to be produced, wherein FIG. 6A is a front view and FIG. 6B is a rear view.
1…押出機 2…サーキュラーダイ 3…切断刃 4…スパイダーリング 5…スパイダー部 6…ダイ外殻 7…トピード 9…環状樹脂流路 10…押出チューブ 11…内側抵抗部材 12…外側抵抗部材 13…抵抗突起部 14…フィン P…合成樹脂板 P1 …板目模様 P2 …柾目模様 DESCRIPTION OF SYMBOLS 1 ... Extruder 2 ... Circular die 3 ... Cutting blade 4 ... Spider ring 5 ... Spider part 6 ... Die shell 7 ... Toped 9 ... Annular resin flow path 10 ... Extrusion tube 11 ... Inner resistance member 12 ... Outer resistance member 13 ... Resistive protrusion 14 ... Fin P ... Synthetic resin plate P1 ... Grain pattern P2 ... Grain pattern
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 B29C 69/00 8413−4F // B29K 511:14 B29L 7:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B29C 69/00 8413-4F // B29K 511: 14 B29L 7:00
Claims (4)
した成形用樹脂材料を、サーキュラーダイを備えた押出
機により所定直径のチューブ状に押出し成形したのち、
該押出チューブを円周方向の一個所で押出方向に切開し
かつ展開して平板状の合成樹脂板を得る方法において、 前記サーキュラーダイとして、トピードをその周方向の
一個所において1つのスパイダー部により外殻に連結支
持したダイを用い、 当該ダイから押出されたチューブを、前記スパイダー部
による樹脂融着線に沿って、当該融着線またはその近傍
位置において切開することを特徴とする木目模様を有す
る合成樹脂板の製造方法。1. A molding resin material mixed with a coloring material for imparting a wood grain pattern is extruded into a tube having a predetermined diameter by an extruder equipped with a circular die,
In the method of incising and expanding the extruded tube in one direction in the circumferential direction in the extrusion direction to obtain a flat plate-shaped synthetic resin plate, as the circular die, a topede is formed by one spider section in one position in the circumferential direction. Using a die connected to and supported by an outer shell, a tube extruded from the die is incised at or near the fusion line along the resin fusion line by the spider section. A method for manufacturing a synthetic resin plate having the same.
状樹脂流路内に押出方向の中間部において外周面側また
は内周面側から内方に突出した多数個のフィンないし突
起を有する抵抗部材を備えたダイを用い、 前記フィンないし突起による成形用樹脂材料中の着色材
の展伸配向により、押出チューブの内外面の少なくとも
いずれか一方に木目模様を付与せしめたものとすること
を特徴とする請求項1に記載の木目模様を有する合成樹
脂板の製造方法。2. As a circular die, a resistance member having a large number of fins or projections protruding inward from the outer peripheral surface side or the inner peripheral surface side at an intermediate portion in the extrusion direction in an annular resin flow channel in the die. Using a die provided, by the spread orientation of the coloring material in the molding resin material by the fins or protrusions, at least one of the inner and outer surfaces of the extruded tube is provided with a wood pattern A method for producing a synthetic resin plate having a wood pattern according to claim 1.
密な配置に設けることにより、押出チューブに柾目模様
を付与することを特徴とする請求項2に記載の木目模様
を有する合成樹脂板の製造方法。3. A synthetic resin plate having a wood grain pattern according to claim 2, wherein the extruded tube is provided with a grain pattern by providing the fins or protrusions in a dense arrangement with a pitch of 1 to 30 mm. Method.
重量部に対し木粉10〜100重量部を更に配合したも
のを用いる請求項1ないし3に記載の木目模様を有する
合成樹脂板の製造方法。4. A thermoplastic resin 100 is used as the molding resin material.
The method for producing a synthetic resin plate having a wood grain pattern according to claim 1, wherein a mixture of 10 to 100 parts by weight of wood powder is used with respect to parts by weight.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7018108A JP2764015B2 (en) | 1995-02-06 | 1995-02-06 | Method for producing a synthetic resin plate having a grain pattern |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7018108A JP2764015B2 (en) | 1995-02-06 | 1995-02-06 | Method for producing a synthetic resin plate having a grain pattern |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08207021A true JPH08207021A (en) | 1996-08-13 |
JP2764015B2 JP2764015B2 (en) | 1998-06-11 |
Family
ID=11962429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7018108A Expired - Fee Related JP2764015B2 (en) | 1995-02-06 | 1995-02-06 | Method for producing a synthetic resin plate having a grain pattern |
Country Status (1)
Country | Link |
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JP (1) | JP2764015B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108454055A (en) * | 2018-06-06 | 2018-08-28 | 南京联塑科技实业有限公司 | A kind of mold improving PVC spool production stabilities |
-
1995
- 1995-02-06 JP JP7018108A patent/JP2764015B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108454055A (en) * | 2018-06-06 | 2018-08-28 | 南京联塑科技实业有限公司 | A kind of mold improving PVC spool production stabilities |
Also Published As
Publication number | Publication date |
---|---|
JP2764015B2 (en) | 1998-06-11 |
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