JP4690155B2 - Extrusion mold - Google Patents

Extrusion mold Download PDF

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JP4690155B2
JP4690155B2 JP2005268291A JP2005268291A JP4690155B2 JP 4690155 B2 JP4690155 B2 JP 4690155B2 JP 2005268291 A JP2005268291 A JP 2005268291A JP 2005268291 A JP2005268291 A JP 2005268291A JP 4690155 B2 JP4690155 B2 JP 4690155B2
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mold
flow path
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孝司 鈴木
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Misawa Homes Co Ltd
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Description

本発明は、複層押出成形品の製造に用いられる押出成形用金型に関するものである。   The present invention relates to an extrusion mold used for manufacturing a multilayer extrusion product.

複層押出成形品の製造に用いられる押出成形用金型の一例として、特許文献１に記載のものが知られている。この押出成形用金型は、クロスヘッド金型と称されるものであり、主材樹脂流路に被覆樹脂流路が合流するように形成されており、被覆樹脂流路の上流側が少なくとも２つの枝流路に分岐され、それらの枝流路の全部又は１つ以外の流路を分断自在に仕切り板が設けられ、その仕切り板の先端部に、流路分断時に枝流路の上流側に面するような傾斜面が形成されている。   The thing of patent document 1 is known as an example of the metal mold | die for extrusion molding used for manufacture of a multilayer extrusion molding article. This extrusion mold is called a crosshead mold, and is formed so that the coating resin flow path merges with the main material resin flow path, and at least two upstream sides of the coating resin flow path are formed. A partition plate is provided so as to be branched into branch channels, and all or one of the branch channels can be divided freely. An inclined surface that faces is formed.

このようなクロスヘッド金型では、仕切り板による流路分断及び仕切り板の先端部の傾斜面に作用する樹脂圧による流路開口により、１つの枝流路より供給される被覆樹脂をその枝流路以外の他の１つの枝流路を流れる被覆樹脂に切り替えるようにして、その色替えや樹脂替えを短時間にて行うことができる。
特開平９−２０１８６４号公報 In such a cross-head mold, the coating resin supplied from one branch flow path is divided by the flow path division by the partition plate and the flow path opening by the resin pressure acting on the inclined surface of the front end portion of the partition plate. The color change or resin change can be performed in a short time by switching to the coating resin flowing through one branch flow path other than the road.
Japanese Patent Laid-Open No. 9-201864

ところが、上記のようなクロスヘッド金型と称される押出成形用金型は、複層成形専用のものであるため、同一断面の単層成形品を押出成形する場合でも、クロスヘッド金型全体を単層用成形用の金型に交換する必要がある。
金型は高価なものであるので、２種類の金型を用意するのは金型費用が嵩むうえ、単層成形と複層成形とで金型全体を交換するのは手間がかかる作業となる。 However, since the extrusion mold called the crosshead mold as described above is exclusively for multi-layer molding, even when a single-layer molded product having the same cross section is extruded, the entire crosshead mold is used. Needs to be replaced with a mold for single layer molding.
Since the mold is expensive, preparing two types of molds increases the cost of the mold, and exchanging the entire mold between single-layer molding and multi-layer molding is laborious. .

本発明は上記事情に鑑みてなされたもので、単層成形と複層成形との双方を容易に選択的に行うことができ、かつ、金型費用を抑えることができる押出成形用金型を提供することを課題としている。   The present invention has been made in view of the above circumstances, and an extrusion mold capable of easily and selectively performing both single-layer molding and multi-layer molding and suppressing mold costs. The issue is to provide.

上記課題を解決するために、請求項１に記載の発明は、例えば図１〜図５に示すように、主材樹脂流路３が形成された金型本体１と、この金型本体１に着脱可能に取り付けられる着脱金型２Ａ，２Ｂとを備えた押出成形用金型において、
前記着脱金型２Ａ，２Ｂには、前記主材樹脂流路３に合流する被覆樹脂流路８が形成された複層成形用型２Ａと、主材樹脂流路３の断面と等しい断面の流路１１が形成された単層成形用型２Ｂとの２種類があり、これら複層成形用型２Ａと単層成形用型２Ｂとは選択的に、前記金型本体１に取り付けられ、
前記金型本体１は、主材樹脂の流れ方向に第１金型５と第２金型６との２つに分割され
ており、これら第１金型５と第２金型６との間に、前記着脱金型２Ａ，２Ｂが設けられ、この着脱金型２Ａ，２Ｂが前記第１金型５と第２金型６とによって挟みつけられて固定されることを特徴とする。 In order to solve the above-mentioned problem, the invention described in claim 1 includes, as shown in FIGS. 1 to 5, for example, a mold body 1 in which a main material resin flow path 3 is formed, and the mold body 1. In an extrusion mold provided with detachable molds 2A and 2B which are detachably attached,
In the detachable molds 2A and 2B, a multilayer molding die 2A in which a coating resin flow path 8 that merges with the main material resin flow path 3 is formed, and a flow having a cross section equal to the cross section of the main material resin flow path 3 is provided. There are two types, a single-layer molding die 2B in which a path 11 is formed, and these multi-layer molding die 2A and single-layer molding die 2B are selectively attached to the mold body 1,
The mold body 1 is divided into a first mold 5 and a second mold 6 in the flow direction of the main material resin.
The detachable molds 2A, 2B are provided between the first mold 5 and the second mold 6, and the detachable molds 2A, 2B are the first mold 5 and the second mold. 6 and is fixed by being sandwiched between the two.

請求項１に記載の発明によれば、複層成形用型２Ａと単層成形用型２Ｂとを選択的に金型本体１に取り付けることによって、複層成形と単層成形とを一つの金型本体１を兼用して行うことができ、よって、複層成形の場合と単層成形の場合とで、金型本体１を交換する必要がない。
また、複層成形用型２Ａと単層成形用型２Ｂとは、金型本体１に比して金型費用がかからない。
したがって、単層成形と複層成形とを容易に選択的に行うことができ、かつ、金型費用を抑えることができる。 According to the first aspect of the present invention, the multi-layer molding and the single-layer molding can be performed together by selectively attaching the multi-layer molding die 2A and the single-layer molding die 2B to the mold body 1. The mold main body 1 can also be used. Therefore, it is not necessary to exchange the mold main body 1 between the multilayer molding and the single-layer molding.
Further, the multi-layer molding die 2 </ b> A and the single-layer molding die 2 </ b> B are less expensive than the mold body 1.
Therefore, the single layer molding and the multilayer molding can be easily and selectively performed, and the mold cost can be suppressed.

また、第１金型５と第２金型６との間に着脱金型２Ａ，２Ｂが設けられるので、該着脱金型２Ａ，２Ｂを第１金型５と第２金型６とで挟み付けて強固に固定できる。
また、第１金型５と第２金型６の分割位置を適宜設定することによって、着脱金型２Ａ，２Ｂを金型本体１の主材樹脂流路３の所望の位置に設けることができる。 Further , since the detachable molds 2A and 2B are provided between the first mold 5 and the second mold 6, the detachable molds 2A and 2B are sandwiched between the first mold 5 and the second mold 6. It can be fixed firmly.
Further, by appropriately setting the dividing position of the first mold 5 and the second mold 6, the detachable molds 2 </ b> A and 2 </ b> B can be provided at desired positions of the main material resin flow path 3 of the mold body 1. .

請求項２に記載の発明は、例えば図１〜図５に示すように、請求項１に記載の押出成形用金型において、
前記複層成形用型２Ａには、被覆樹脂流路８（環状流路８ｂ）が主材樹脂の流れ方向と交差する断面において前記主材樹脂流路３を囲むようにして設けられていることを特徴とする。 The invention according to claim 2 is an extrusion mold according to claim 1, for example, as shown in FIGS.
The multilayer mold 2A is provided with a coating resin flow path 8 (annular flow path 8b) so as to surround the main material resin flow path 3 in a cross section intersecting with the flow direction of the main material resin. And

請求項２に記載の発明によれば、主材樹脂成形体の表面を被覆樹脂によって容易かつ確実に被覆できる。 According to invention of Claim 2 , the surface of the main material resin molding can be easily and reliably covered with the coating resin.

請求項３に記載の発明は、請求項１または２に記載の押出成形用金型において、
前記複層成形用型２Ａには、その被覆樹脂流路８に被覆樹脂を押出し充填する樹脂押出機を接続するための、接続アダプタ１０が取り付けられていることを特徴とする。 The invention according to claim 3 is the extrusion mold according to claim 1 or 2 ,
A connecting adapter 10 for connecting a resin extruder for extruding and filling a coating resin to the coating resin flow path 8 is attached to the multilayer molding die 2A.

請求項３に記載の発明によれば、複層成形用型２Ａに取り付けられた接続アダプタ１０に、樹脂押出機を接続することによって、複層成形用型２Ａの被覆樹脂流路８に樹脂を押出し充填できる。また、複層成形用型２Ａを複数種類用意した場合に、これらに接続アダプタ１０を取り付け、付け替えることによって、それぞれの複層成形用型２Ａの被覆樹脂流路８に樹脂を押出し充填できる。 According to the invention described in claim 3 , by connecting a resin extruder to the connection adapter 10 attached to the multilayer molding die 2A, the resin is applied to the coating resin flow path 8 of the multilayer molding die 2A. Can be extruded and filled. When a plurality of types of multilayer molding molds 2A are prepared, the resin can be extruded and filled into the coated resin flow paths 8 of the respective multilayer molding molds 2A by attaching and changing the connection adapters 10 to these.

本発明によれば、主材樹脂流路が形成された金型本体に着脱可能に取り付けられる着脱金型には、主材樹脂流路に合流する被覆樹脂流路が形成された複層成形用型と、主材樹脂流路の断面と等しい断面の流路が形成された単層成形用型との２種類があり、これら複層成形用型と単層成形用型とが選択的に金型本体に取り付けられるので、複層成形と単層成形とを一つの金型本体を兼用して行うことができ、金型本体を交換する必要がない。また、複層成形用型と単層成形用型とは、金型本体に比して金型費用がかからない。したがって、単層成形と複層成形とを容易に選択的に行うことができ、かつ、金型費用を抑えることができる。   According to the present invention, the detachable mold that is detachably attached to the mold body in which the main material resin flow path is formed has a coating resin flow path that joins the main material resin flow path. There are two types: a mold and a single-layer molding mold in which a flow path having a cross section equal to the cross section of the main material resin flow path is formed. Since it is attached to the mold body, the multilayer molding and the single-layer molding can be performed using one mold body, and there is no need to exchange the mold body. Further, the mold for the multi-layer molding and the mold for the single-layer molding are less expensive than the mold body. Therefore, the single layer molding and the multilayer molding can be easily and selectively performed, and the mold cost can be suppressed.

以下、図面を参照して本発明の実施の形態について説明する。
図１は本発明に係る押出成形用金型の側断面図、図２は図１におけるＡ―Ａ線断面図、図３は図１におけるＸ円部の拡大図である。 Embodiments of the present invention will be described below with reference to the drawings.
1 is a side sectional view of an extrusion mold according to the present invention, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is an enlarged view of an X circle portion in FIG.

押出成形用金型は、２層成形と１層成形とを金型本体１を共通型として行えるものであり、金型本体１と、この金型本体１に取り付けられる着脱金型２Ａ，２Ｂ（図５参照）とを備えている。なお、図１においては、着脱金型２Ａが装着されている。
金型本体１の内部には、主材樹脂流路３が金型本体１を図１において左右に貫通するようにして形成されている。金型本体１の右端部には、主材樹脂を主材樹脂流路３に押出し供給する主材押出機Ｍが接続されている。主材樹脂流路３内にはマンドレル４が挿入されており、このマンドレル４は主材樹脂流路３の内周面との間に、所定の間隔をもって配置されている。マンドレル４は図２に示すように、３本配置されており、この３本のマンドレル４によって、押出成形された成形品の内部にマンドレル４の断面と同じ空洞が形成される。 The mold for extrusion molding can perform two-layer molding and one-layer molding by using the mold body 1 as a common mold. The mold body 1 and the detachable molds 2A and 2B attached to the mold body 1 ( (See FIG. 5). In FIG. 1, a detachable mold 2A is mounted.
Inside the mold main body 1, a main material resin flow path 3 is formed so as to penetrate the mold main body 1 left and right in FIG. Connected to the right end of the mold main body 1 is a main material extruder M for extruding and supplying main material resin to the main material resin flow path 3. A mandrel 4 is inserted into the main material resin flow path 3, and the mandrel 4 is disposed between the inner peripheral surface of the main material resin flow path 3 with a predetermined interval. As shown in FIG. 2, three mandrels 4 are arranged, and the three mandrels 4 form the same cavity as the cross section of the mandrel 4 inside the extruded product.

また、金型本体１は、第１金型５と第２金型６との２つに分割されており、これら第１金型５と第２金型６との間に、前記着脱金型２Ａが設けられている。第１金型５は、主材押出機に接続されており、第２金型６は着脱金型２Ａを挟んで第１金型５の先端面に接続されている。   The mold body 1 is divided into a first mold 5 and a second mold 6, and the detachable mold is interposed between the first mold 5 and the second mold 6. 2A is provided. The first mold 5 is connected to the main material extruder, and the second mold 6 is connected to the front end surface of the first mold 5 with the detachable mold 2A interposed therebetween.

着脱金型２Ａは、複層成形用型２Ａであり、長方形板状に形成されている。この複層成形用型２Ａの略中央部には、それを厚さ方向に貫通する貫通孔７が形成されており、この貫通孔７は前記主材樹脂流路３に連続するように配置されている。すなわち、第１金型５には、主材樹脂流路３ａが形成されており、第２金型６には主材樹脂流路３ｂが形成されているが、これら主材樹脂流路３ａ，３ｂを繋ぐように前記貫通孔７が配置されている。また、この貫通孔７の内周面は主材樹脂流路３の内周面より内側に突出しており、図３に示すように、主材樹脂の流れ方向に向けて、内側に傾斜する傾斜面７ａと、この傾斜面７ａの先端部から主材樹脂の流れ方向と平行な平行面７ｂとから構成されている。   The detachable mold 2A is a multilayer molding mold 2A and is formed in a rectangular plate shape. A through hole 7 that penetrates the multilayer molding die 2A in the thickness direction is formed at a substantially central portion, and the through hole 7 is disposed so as to be continuous with the main material resin flow path 3. ing. That is, a main material resin flow path 3a is formed in the first mold 5, and a main material resin flow path 3b is formed in the second mold 6. The through hole 7 is arranged so as to connect 3b. Further, the inner peripheral surface of the through hole 7 protrudes inward from the inner peripheral surface of the main material resin flow path 3, and as shown in FIG. 3, is inclined to inward toward the flow direction of the main material resin. It is comprised from the surface 7a and the parallel surface 7b parallel to the flow direction of main material resin from the front-end | tip part of this inclined surface 7a.

また、複層成形用型２Ａの内部には被覆樹脂流路８が形成されている。この被覆樹脂流路８は、上下方向に延設された２本の縦流路８ａ，８ａと、この縦流路８ａ，８ａの下端部に接続された環状流路８ｂとを備えている。環状流路８ｂは、主材樹脂の流れ方向と交差する断面において主材樹脂流路３を囲むように、つまり前記貫通孔７を囲むようにして設けられている。なお、縦流路８ａは、１本でもあるいは３本以上でもよい。
環状流路８ｂは、複層成形用型２Ａの表面に溝状に形成されたものであり、この環状流路８ｂと前記貫通孔７との間には、隙間９が形成されている。つまり、複層成形用型２Ａの、前記貫通孔７の周囲の面は、複層成形用型２Ａの表面より若干引っ込んでおり、この引っ込んだ面と、前記第２金型６の表面との間に前記隙間９が形成されている。
そして、環状流路８ｂを流れる被覆樹脂は隙間９を通って主材樹脂流路３に入り、この主材樹脂流路３を流れる主材樹脂の表面に乗って主材樹脂とともに流れるようになっている。なお、被覆樹脂の厚さは、貫通孔７の内周面が主材樹脂流路３の内周面より内側に突出する突出長さと、前記隙間９の幅とによって調整される。 In addition, a coating resin flow path 8 is formed inside the multilayer mold 2A. The covering resin flow path 8 includes two vertical flow paths 8a and 8a extending in the vertical direction and an annular flow path 8b connected to the lower ends of the vertical flow paths 8a and 8a. The annular flow path 8b is provided so as to surround the main material resin flow path 3 in a cross section intersecting with the flow direction of the main material resin, that is, to surround the through hole 7. The longitudinal flow path 8a may be one or three or more.
The annular flow path 8 b is formed in a groove shape on the surface of the multilayer molding die 2 A, and a gap 9 is formed between the annular flow path 8 b and the through hole 7. That is, the surface around the through-hole 7 of the multilayer molding die 2A is slightly recessed from the surface of the multilayer molding die 2A, and the retracted surface and the surface of the second mold 6 are The gap 9 is formed between them.
The coating resin flowing through the annular flow path 8b enters the main material resin flow path 3 through the gap 9, and flows along with the main material resin on the surface of the main material resin flowing through the main material resin flow path 3. ing. Note that the thickness of the coating resin is adjusted by the protruding length of the inner peripheral surface of the through hole 7 protruding inward from the inner peripheral surface of the main material resin flow path 3 and the width of the gap 9.

また、複層成形用型２Ａの上部表面には、接続アダプタ１０が取り付けられている。この接続アダプタ１０は、前記被覆樹脂流路８に被覆樹脂を押出し充填する樹脂押出機（図示略）を接続するためのものであり、縦流路１０ａと、この縦流路１０ａの下端部から分岐する分岐流路１０ｂ，１０ｂと、この分岐流路１０ｂ，１０ｂを前記被覆樹脂流路８の縦流路８ａ，８ａに接続する接続流路１０ｃ，１０ｃとを備えている。縦流路１０ａは接続アダプタ１０の上面に開口しており、この開口部に樹脂押出機が接続されるようになっている。   A connection adapter 10 is attached to the upper surface of the multilayer molding die 2A. The connection adapter 10 is for connecting a resin extruder (not shown) for extruding and filling a coating resin to the coating resin flow path 8, and from the vertical flow path 10a and the lower end of the vertical flow path 10a. The branched flow paths 10b and 10b are branched, and the branched flow paths 10b and 10b are connected to the vertical flow paths 8a and 8a of the coated resin flow path 8 and connected flow paths 10c and 10c. The longitudinal flow path 10a is opened on the upper surface of the connection adapter 10, and a resin extruder is connected to this opening.

単層成形用型２Ｂは、図５に示すように、複層成形用型２Ａと厚さが等しい長方形板状に形成されており、その略中央部には、それを厚さ方向に貫通する貫通孔（流路）１１が形成されている。この貫通孔１１は、主材樹脂流路３の断面と等しい断面を有するものであり、主材樹脂流路３に連続するように配置されるようになっている。   As shown in FIG. 5, the single-layer molding die 2 </ b> B is formed in a rectangular plate shape having the same thickness as the multilayer molding die 2 </ b> A. A through hole (flow path) 11 is formed. The through hole 11 has a cross section equal to the cross section of the main material resin flow path 3 and is arranged to be continuous with the main material resin flow path 3.

上記のような構成の押出成形用金型によって複層成形を行う場合、図１〜図３に示すように、金型本体１を構成する第１金型５と第２金型６との間に、複層成形用型２Ａを配置し、この複層成形用型２Ａを第１金型５と第２金型６とによって挟み付けて強固に固定する。複層成形用型２を配置する場合、その貫通孔７と金型本体１の主材樹脂流路３とが同軸となるように配置する。これによって、貫通孔７の内周面が主材樹脂流路３の内周面より内側に突出するとともに、貫通孔７の傾斜面７ａの上流側の端縁が、第１金型５の主材樹脂流路３ａの開口縁に合致し、貫通孔７と主材樹脂流路３ａが滑らかに繋がる。   When multi-layer molding is performed using an extrusion mold having the above-described configuration, as shown in FIGS. 1 to 3, between the first mold 5 and the second mold 6 constituting the mold body 1. In addition, a multilayer molding die 2A is disposed, and the multilayer molding die 2A is sandwiched between the first mold 5 and the second mold 6 and firmly fixed. When the multilayer molding die 2 is arranged, the through hole 7 and the main material resin flow path 3 of the mold body 1 are arranged so as to be coaxial. As a result, the inner peripheral surface of the through hole 7 protrudes inward from the inner peripheral surface of the main material resin flow path 3, and the upstream edge of the inclined surface 7 a of the through hole 7 is the main edge of the first mold 5. It matches the opening edge of the material resin flow path 3a, and the through hole 7 and the main material resin flow path 3a are smoothly connected.

そして、主材押出機から主材樹脂を押出して、主材樹脂流路３に供給すると、主材樹脂が主材樹脂流路３を下流側（図１において左側）に向けて流れ、複層成形用型２の傾斜面７ａによって内側に若干絞られ、さらに平行面７ｂによって、主材樹脂流路３と平行に流れていく。平行面７ｂは主材樹脂路３の内周面より内側に突出しているので、この平行面７ｂを過ぎた部分では、主材樹脂と主材樹脂流路３の内周面との間に隙間が生じるので、この隙間に被覆樹脂を押出し供給する。   Then, when the main material resin is extruded from the main material extruder and supplied to the main material resin flow path 3, the main material resin flows toward the downstream side (left side in FIG. 1) of the main material resin flow path 3 The molding die 2 is slightly narrowed inward by the inclined surface 7a, and further flows parallel to the main material resin flow path 3 by the parallel surface 7b. Since the parallel surface 7 b protrudes inward from the inner peripheral surface of the main material resin path 3, there is a gap between the main material resin and the inner peripheral surface of the main material resin flow path 3 at a portion past the parallel surface 7 b. Therefore, the coating resin is extruded and supplied into this gap.

すなわち、接続アダプタ１０に接続されている樹脂押出機から被覆樹脂流路８に被覆樹脂を押出し供給することによって、この被覆樹脂が縦流路１０ａ、分岐流路１０ｂ，１０ｂ、接続流路１０ｃ，１０ｃを流れて、被覆成形用型２Ａの被覆樹脂流路８に供給され、さらに、この被覆樹脂流路８の縦流路８ａ，８ａを流れて、環状流路８ｂに入り込み、この環状流路８ｂを流れる。環状流路８ｂを流れる被覆樹脂は隙間９を通って、主材樹脂と主材樹脂流路３の内周面との間に隙間に達し、この部分で主材樹脂路３を流れる主材樹脂の表面に乗って、主材樹脂とともに流れる。
このようにして、押出成形していくことによって、図４に示すような押出成形体１５を得ることができる。この図において、符号１５ａで示す部分が主材樹脂で形成された本体であり、符号１５ｂで示す部分が本体１５ａの表面に、被覆樹脂で被覆された被覆層である。 That is, when the coating resin is extruded and supplied to the coating resin flow path 8 from the resin extruder connected to the connection adapter 10, the coating resin is supplied to the vertical flow path 10a, the branch flow paths 10b and 10b, the connection flow path 10c, 10c and supplied to the coating resin flow path 8 of the coating molding die 2A, and further flows through the longitudinal flow paths 8a and 8a of the coating resin flow path 8 to enter the annular flow path 8b. It flows through 8b. The coating resin flowing in the annular flow path 8b passes through the gap 9, reaches the gap between the main material resin and the inner peripheral surface of the main material resin flow path 3, and the main material resin flowing in the main material resin path 3 in this portion. It flows with the main material resin.
Thus, the extrusion molding 15 as shown in FIG. 4 can be obtained by extrusion molding. In this figure, a portion indicated by reference numeral 15a is a main body formed of a main material resin, and a portion indicated by reference numeral 15b is a coating layer in which the surface of the main body 15a is covered with a coating resin.

一方、上記のような構成の押出成形用金型によって単層成形を行う場合、図５に示すように、前記複層成形用型１Ａを取り外して、単層成形用型２Ｂを取り付ける。この場合、第２金型６を第１金型５から引き離したうえで、複層成形用型１Ａを取り外して、その代わりに、単層成形用型２Ｂを第１金型５と第２金型６とによって挟み付けて強固に固定する。単層成形用型２Ｂと複層成形用型２Ａは厚さが等しいので、第１金型５、第２金型６、マンドレル４の配置関係がくずれることはない。   On the other hand, when single-layer molding is performed with an extrusion mold having the above-described configuration, the multi-layer molding die 1A is removed and a single-layer molding die 2B is attached, as shown in FIG. In this case, after the second mold 6 is separated from the first mold 5, the multilayer molding mold 1A is removed, and instead, the single-layer molding mold 2B is replaced with the first mold 5 and the second mold. It is sandwiched by the mold 6 and firmly fixed. Since the single-layer molding die 2B and the multilayer molding die 2A have the same thickness, the arrangement relationship of the first mold 5, the second mold 6, and the mandrel 4 will not be disrupted.

そして、主材押出機から主材樹脂を押出して、主材樹脂流路３に供給すると、主材樹脂が主材樹脂流路３を下流側（図５において左側）に向けて流れ、単層成形用型２Ｂの貫通孔１１を通って、主材樹脂流路３に沿って流れていく。
このようにして、押出成形された押出成形体は、図４に示す押出成形体１５と大きさ、形状が等しいものとなるが、被覆層は形成されない。つまり、単層成形することができる。 When the main material resin is extruded from the main material extruder and supplied to the main material resin flow path 3, the main material resin flows through the main material resin flow path 3 toward the downstream side (the left side in FIG. 5). It flows along the main material resin flow path 3 through the through hole 11 of the molding die 2B.
In this way, the extruded molded body is the same in size and shape as the extruded molded body 15 shown in FIG. 4, but no coating layer is formed. That is, single layer molding can be performed.

このように本実施の形態によれば、複層成形用型２Ａと単層成形用型２Ｂとを選択的に金型本体１に取り付けることによって、複層成形と単層成形とを一つの金型本体１を兼用して行うことができ、よって、複層成形の場合と単層成形の場合とで、金型本体１を交換する必要がない。
また、複層成形用型２Ａと単層成形用型２Ｂとは、金型本体１に比して金型費用がかからない。
したがって、単層成形と複層成形とを容易に選択的に行うことができ、かつ、金型費用を抑えることができる。 As described above, according to the present embodiment, the multi-layer molding and the single-layer molding can be performed together by selectively attaching the multi-layer molding die 2A and the single-layer molding die 2B to the mold body 1. The mold main body 1 can also be used. Therefore, it is not necessary to exchange the mold main body 1 between the multilayer molding and the single-layer molding.
Further, the multi-layer molding die 2 </ b> A and the single-layer molding die 2 </ b> B are less expensive than the mold body 1.
Therefore, the single layer molding and the multilayer molding can be easily and selectively performed, and the mold cost can be suppressed.

また、金型本体１を第１金型５と第２金型６とによって構成し、第１金型５と第２金型６との間に着脱金型２Ａ，２Ｂが設けられるので、該着脱金型２Ａ，２Ｂを第１金型５と第２金型６とで挟み付けて強固に固定できる。
また、第１金型５と第２金型６の分割位置を適宜設定することによって、着脱金型２Ａ，２Ｂを金型本体１の主材樹脂流路８の所望の位置に設けることができる。 Further, the mold body 1 is constituted by the first mold 5 and the second mold 6, and the detachable molds 2 </ b> A and 2 </ b> B are provided between the first mold 5 and the second mold 6. The detachable molds 2A and 2B can be sandwiched between the first mold 5 and the second mold 6 and firmly fixed.
Further, by appropriately setting the dividing position of the first mold 5 and the second mold 6, the detachable molds 2 </ b> A and 2 </ b> B can be provided at desired positions of the main material resin flow path 8 of the mold body 1. .

さらに、複層成形用型２Ａには、被覆樹脂流路８の環状流路８ｂが主材樹脂の流れ方向と交差する断面において主材樹脂流路３を囲むようにして設けられているので、主材樹脂成形体（本体１５ａ）の表面を被覆樹脂（被覆層１５ｂ）によって容易かつ確実に被覆できる。
加えて、複層成形用型２Ａには、その被覆樹脂流路８に被覆樹脂を押出し充填する樹脂押出機を接続するための、接続アダプタ１０が取り付けられているので、この接続アダプタ１０に、樹脂押出機を接続することによって、複層成形用型２Ａの被覆樹脂流路８に樹脂を押出し充填できる。また、複層成形用型２Ａを複数種類用意した場合に、これらに接続アダプタ１０を取り付け、付け替えることによって、それぞれの複層成形用型２Ａの被覆樹脂流路８に樹脂を押出し充填できる。 Further, in the multilayer molding die 2A, the annular flow path 8b of the covering resin flow path 8 is provided so as to surround the main material resin flow path 3 in a cross section intersecting with the flow direction of the main material resin. The surface of the resin molded body (main body 15a) can be easily and reliably coated with the coating resin (coating layer 15b).
In addition, since the connection adapter 10 for connecting a resin extruder for extruding and filling the coating resin to the coating resin flow path 8 is attached to the multi-layer molding die 2A, By connecting the resin extruder, the resin can be extruded and filled into the coated resin flow path 8 of the multilayer molding die 2A. When a plurality of types of multilayer molding molds 2A are prepared, the resin can be extruded and filled into the coated resin flow paths 8 of the respective multilayer molding molds 2A by attaching and changing the connection adapters 10 to these.

なお、上記の実施の形態では、複層成形の際に、本体１５ａの４周に被覆層１５ｂを形成するようにしたが、これに限ることなく、本体１５ａの３周以下の面に被覆するようにしてもよい。この場合、複層成形用型２Ａに形成する環状流路３ｂを、本体１５の被覆する面に合わせて配置すればよい。 In the form of implementation described above, when the multi-layer molded, but so as to form a coating layer 15b on the four laps of the main body 15a, the present invention is not limited to this, coating the three laps following aspects of the body 15a You may make it do. In this case, the annular flow path 3b formed in the multilayer molding die 2A may be arranged in accordance with the surface that the main body 15 covers.

本発明に係る押出成形用金型の一例を示すもので、複層成形用型を取り付けた状態の側断面図である。An example of the extrusion mold which concerns on this invention is shown, and it is a sectional side view of the state which attached the multilayer mold. 図１におけるＡ―Ａ線断面図である。It is the sectional view on the AA line in FIG. 図１におけるＸ円部の拡大図である。It is an enlarged view of the X circle part in FIG. 本発明に係る押出成形用金型で押出成形された押出成単層成形用型を取り付けた状態の側断面図である。It is a sectional side view of the state which attached the mold for extrusion single layer molding extruded by the metal mold | die for extrusion which concerns on this invention. 本発明に係る押出成形用金型の一例を示すもので、単層成形用型を取り付けた状態の側断面図である。An example of the extrusion-molding die concerning the present invention is shown, and is a side sectional view in the state where a single-layer molding die is attached.

符号の説明Explanation of symbols

１ 金型本体
２Ａ 複層成形用型（着脱金型）
２Ｂ 単層成形用型（着脱金型）
３ 主材樹脂流路
５ 第１金型
６ 第２金型
８ 被覆樹脂流路
１０ 接続アダプタ 1 Mold body 2A Multi-layer mold (detachable mold)
2B Single layer mold (detachable mold)
3 Main material resin flow path 5 First mold 6 Second mold 8 Coating resin flow path 10 Connection adapter

Claims (3)

主材樹脂流路が形成された金型本体と、この金型本体に着脱可能に取り付けられる着脱金型とを備えた押出成形用金型において、
前記着脱金型には、前記主材樹脂流路に合流する被覆樹脂流路が形成された複層成形用型と、主材樹脂流路の断面と等しい断面の流路が形成された単層成形用型との２種類があり、これら複層成形用型と単層成形用型とは選択的に、前記金型本体に取り付けられ、
前記金型本体は、主材樹脂の流れ方向に第１金型と第２金型との２つに分割されており、これら第１金型と第２金型との間に、前記着脱金型が設けられ、この着脱金型が前記第１金型と第２金型とによって挟みつけられて固定されることを特徴とする押出成形用金型。 In an extrusion mold having a mold body in which a main material resin flow path is formed and a detachable mold that is detachably attached to the mold body,
The detachable mold includes a multi-layer molding die in which a coating resin flow path that merges with the main material resin flow path is formed, and a single layer in which a flow path having a cross section equal to the cross section of the main material resin flow path is formed. There are two types of molds, these multi-layer molds and single-layer molds are selectively attached to the mold body,
The mold body is divided into a first mold and a second mold in the flow direction of the main resin, and the detachable mold is interposed between the first mold and the second mold. An extrusion mold, wherein a mold is provided, and the removable mold is sandwiched and fixed between the first mold and the second mold. 請求項１に記載の押出成形用金型において、
前記複層成形用型には、被覆樹脂流路が主材樹脂の流れ方向と交差する断面において前記主材樹脂流路を囲むようにして設けられていることを特徴とする押出成形用金型。 In the extrusion mold according to claim 1 ,
An extrusion mold, wherein the multilayer molding die is provided so that a coating resin channel surrounds the main material resin channel in a cross section intersecting with a flow direction of the main material resin. 請求項１または２に記載の押出成形用金型において、
前記複層成形用型には、その被覆樹脂流路に被覆樹脂を押出し充填する樹脂押出機を接続するための、接続アダプタが取り付けられていることを特徴とする押出成形用金型。 In the extrusion mold according to claim 1 or 2 ,
A mold for extrusion molding, wherein a connection adapter for connecting a resin extruder for extruding and filling a coating resin to the coating resin flow path is attached to the multilayer molding die.
JP2005268291A 2005-09-15 2005-09-15 Extrusion mold Expired - Fee Related JP4690155B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190372U (en) * 1975-01-16 1976-07-20
JPS60101021A (en) * 1983-11-09 1985-06-05 Asahi Chem Ind Co Ltd Method and device for extruding ultra-high-molecular- weight polyethylene
JPH05509048A (en) * 1991-11-27 1993-12-16 ゼネラル・エレクトリック・カンパニイ Modular tubular extrusion head
JP2005199436A (en) * 2004-01-13 2005-07-28 Norichika Takebe Two-layer in-mold coating die and extruder remodeling method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190372U (en) * 1975-01-16 1976-07-20
JPS60101021A (en) * 1983-11-09 1985-06-05 Asahi Chem Ind Co Ltd Method and device for extruding ultra-high-molecular- weight polyethylene
JPH05509048A (en) * 1991-11-27 1993-12-16 ゼネラル・エレクトリック・カンパニイ Modular tubular extrusion head
JP2005199436A (en) * 2004-01-13 2005-07-28 Norichika Takebe Two-layer in-mold coating die and extruder remodeling method

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