JPH071547A - Metal mold for extrusion molding of synthetic resin sheet - Google Patents
Metal mold for extrusion molding of synthetic resin sheetInfo
- Publication number
- JPH071547A JPH071547A JP5149094A JP14909493A JPH071547A JP H071547 A JPH071547 A JP H071547A JP 5149094 A JP5149094 A JP 5149094A JP 14909493 A JP14909493 A JP 14909493A JP H071547 A JPH071547 A JP H071547A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- clearance
- resin
- spacer
- 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
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は合成樹脂シ−トの押出成
形に使用される金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used for extrusion molding of synthetic resin sheet.
【0002】[0002]
【従来の技術】合成樹脂シ−トを押出成形する場合、押
出機にシ−ト成形用金型を連結し、押出機から送られて
くる樹脂を当該金型内で製品シ−ト巾にまで広げて金型
先端からシ−ト状に押出していくことが必要である。2. Description of the Related Art When a synthetic resin sheet is extrusion-molded, a sheet molding die is connected to the extruder and the resin sent from the extruder is made into a product sheet width within the die. It is necessary to spread it up to the end and extrude it in a sheet shape from the tip of the mold.
【0003】従来、このシ−ト成形用金型として、図3
の(イ)並びに図3の(ロ)に示すようなT型マニホ−
ルドダイが知られている。このT型マニホ−ルドダイに
おいては、樹脂流入孔13’とマニホ−ルド14’を有
する上部金型本体12’と下部金型本体11’との先端
部内面に上リップ152'と下リップ151'がそれぞれ取り付
けられ、これらの上下リップで樹脂流路の平行部a’
(ランド)が形成されている。そして、押出機からの樹
脂が樹脂流入孔13’を経てマニホ−ルド14’に達す
ると巾方向に広げられ、この巾方向拡張樹脂が上下リッ
プ151',152'間の樹脂流路平行部a’で製品形状(シ−
ト形状)に賦型されつつ、金型先端から押し出されてい
く。Conventionally, as this sheet molding die, FIG.
(A) and T-type manifold shown in (b) of FIG.
Ludodai is known. In this T-type manifold die, an upper lip 152 'and a lower lip 151' are formed on the inner surfaces of the tips of the upper mold body 12 'and the lower mold body 11' having a resin inflow hole 13 'and a manifold 14'. Are attached respectively, and these upper and lower lips are used to connect the parallel part a ′ of the resin flow path.
(Land) is formed. When the resin from the extruder reaches the manifold 14 'through the resin inflow hole 13', the resin is spread in the width direction, and this width-direction expanding resin is a resin flow path parallel portion a between the upper and lower lips 151 ', 152'. 'In the product shape (see
(Shaped), while being extruded from the tip of the mold.
【0004】このT型マニホ−ルドダイにおいて、製品
シ−ト厚みの設定要素は樹脂流路平行部a’のクリアラ
ンス、すなわち上下リップ151',152'間のクリアランス
である。In this T-type manifold die, the factor for setting the product sheet thickness is the clearance of the resin flow path parallel portion a ', that is, the clearance between the upper and lower lips 151', 152 '.
【0005】従って、製品シ−トの厚み変更のために、
上リップまたは下リップの取替えが必要とされ、通常、
製品シ−トの厚み変更は次の作業手順で行われている。
すなわち。まず、生産ラインの運行を中断し、押出機
を停止する、押出機から金型を取外し、所定の金型解
体場所に移動させる、金型本体を上下に解体分解し、
付着樹脂を除去してクリ−ニングを行う、各リップと
各金型本体とのボルト締結を解除して、リップを金型本
体から取り外す、次の各リップを各金型本体にボルト
で仮締結し、次いで、これらの上下の金型本体をボルト
で締結する、上下リップ間のクリアランスを調整し、
そのクリアランスを設定値にしたのちに、各リップを各
金型本体に最終的に締結する、金型を押出機に連結し
て、生産再開の準備を行う、押出機を再駆動し、生産
を再開する、等の作業手順で行われている。Therefore, in order to change the thickness of the product sheet,
Replacing the upper lip or lower lip is usually required,
The thickness of the product sheet is changed according to the following work procedure.
Ie. First, suspend the operation of the production line, stop the extruder, remove the mold from the extruder, move it to a predetermined mold disassembly location, disassemble and disassemble the mold body up and down,
Cleans by removing the attached resin, releasing the bolt fastening between each lip and each die body, removing the lip from the die body, and temporarily fastening each lip to each die body with bolts Then, tighten the upper and lower mold bodies with bolts, adjust the clearance between the upper and lower lips,
After setting the clearance to the set value, each lip is finally fastened to each mold body, the mold is connected to the extruder, and preparations for restarting production are made. It is carried out according to the work procedure such as restarting.
【0006】[0006]
【発明が解決しようとする課題】上記リップの金型本体
へのボルト締結個数〔このボルトの1個分は図3の
(イ)において4’で示されている〕は数10個にも達
し、リップのボルト孔の加工上の多少の位置ずれを許容
するために、リップのボルト孔をボルトよりもやや大き
くしている。従って、各リップを各金型本体にボルトで
仮締結し、これらの上下の金型本体をボルトで締結した
のち、上記に示す通り、各リップを上下に微調整しリ
ップ間のクリアランスを所定クリアランスに設定値し
て、各リップを各金型本体に最終的に締結することが必
要となる。The number of bolts to be fastened to the die body of the above-mentioned lip (one of these bolts is indicated by 4'in FIG. 3A) reaches several tens. , The lip bolt hole is slightly larger than the bolt in order to allow a slight positional deviation in processing of the lip bolt hole. Therefore, after each lip is temporarily fastened to each mold body with bolts and these upper and lower mold bodies are fastened with bolts, as shown above, each lip is finely adjusted up and down and the clearance between the lips is set to a predetermined clearance. It is necessary to finally fasten each lip to each mold body with a set value of.
【0007】しかしながら、このように上下リップ間の
クリアランスを所定値に保持しつつ各リップを各金型本
体にボルト締結することは、容易ではなく熟練を必要と
し、しかも、リップの巾が広く、ボルト締結の個数が数
10箇(通常約70個)にも達するために、長時間を必
要とし、過大な生産性の低下が余儀なくされている。However, bolting each lip to each mold body while maintaining the clearance between the upper and lower lips at a predetermined value is not easy and requires skill, and the width of the lip is wide. Since the number of bolts to be fastened reaches several tens (usually about 70), it takes a long time and the productivity is inevitably reduced.
【0008】本発明の目的は、製品シ−ト厚みの変更に
当たっての樹脂流路平行部(ランド)のクリアランスの
変更を充分に短時間で容易に行い得、しかも、しかもそ
のクリアランスを高精度で設定できる合成樹脂シ−ト押
出成形用金型を提供することにある。It is an object of the present invention to easily change the clearance of the resin flow path parallel portion (land) when changing the thickness of the product sheet in a sufficiently short time, and moreover, to make the clearance highly accurate. An object is to provide a mold for synthetic resin sheet extrusion molding which can be set.
【0009】[0009]
【課題を解決するための手段】本発明の合成樹脂シ−ト
押出成形用金型は、上下に分割され、その上下間に樹脂
流入孔、マニホ−ルド並びに平行部からなる樹脂流路を
有する金型の合せ面に、上記平行部のクリアランスを設
定するスペ−サが挾持されていることを特徴とする構成
である。The synthetic resin sheet extrusion molding die of the present invention is divided into upper and lower parts, and has a resin flow path consisting of a resin inflow hole, a manifold and a parallel portion between the upper and lower parts. A spacer for setting the clearance of the parallel portion is held between the mating surfaces of the molds.
【0010】[0010]
【作用】設定しようとする樹脂流路平行部のクリアラン
スが、スペ−サの厚みの精度で設定される。この場合、
スペ−サの挾持が上下型の締結ボルトを使用してその金
型の締結と同時に行われるので、従来のリップ装着によ
る樹脂流路平行部のクリアランスの設定の場合とは異な
り、リップを金型本体に装着するためのボルト締結を必
要としない。また、スペ−サの挾持の際に、たとえ、ス
ペ−サにずれが生じても、そのずれは上下の金型の間隔
には何ら影響するところがなく、上記クリアランスを確
実にスペ−サの厚み精度にて設定できる。The clearance of the parallel portion of the resin flow path to be set is set with the accuracy of the thickness of the spacer. in this case,
Since the spacer is clamped at the same time when the mold is fastened using the upper and lower fastening bolts, unlike the conventional method of setting the clearance in the resin flow path parallel part by mounting the lip, It does not require bolting to attach to the body. Further, even if the spacer is misaligned when the spacer is held, the misalignment does not have any effect on the space between the upper and lower molds, and the above clearance is ensured to ensure the thickness of the spacer. It can be set with accuracy.
【0011】[0011]
【実施例】以下、図面により本発明の実施例を説明す
る。図1の(イ)は、本発明において使用する主な部材
を示し、図1の(ロ)は図1の(イ)におけるロ−ロ断
面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A shows the main members used in the present invention, and FIG. 1B is a sectional view taken along the line RO in FIG.
【0012】図1の(イ)並びに(ロ)において、11
は下型、12は上型であり、これら上下型の合掌によっ
て図1の(ハ)に示す樹脂流路を形成するように、本体
部内面に樹脂流入孔13並びにマニホ−ルド14が形成
され、本体部10にリップ部15が連設されている。1
6,…は下型に穿設された有底のボルト穴、17,…は
上型12に貫設されたボルト孔である。2はスペ−サで
あり、上下型の合せ面に等しい外郭形状とされ、ボルト
孔16,…(17,…)に対応してボルト挿通孔21,
…が設けられている。In FIGS. 1A and 1B, 11
Is a lower mold and 12 is an upper mold. A resin inflow hole 13 and a manifold 14 are formed on the inner surface of the main body so that the resin flow path shown in FIG. A lip portion 15 is connected to the main body portion 10. 1
6 are bolt holes with a bottom formed in the lower mold, and 17 are bolt holes formed in the upper mold 12. Reference numeral 2 denotes a spacer, which has an outer shape equal to the mating surfaces of the upper and lower dies and has bolt insertion holes 21, corresponding to the bolt holes 16 ,.
... is provided.
【0013】図2は本発明金型の実施例を示し、上下型
11,12間にスペ−サ2が挾まれ、これらがボルト3
により締結されて、金型に組み立てられている。なお、
上下型の巾両端には、従来の金型と同様、サイドピ−ス
がボルト締結により取り付けられ、樹脂流路平行部の両
端が閉塞されているが、このサイドピ−スの図示は省略
してある。FIG. 2 shows an embodiment of the mold of the present invention, in which the spacer 2 is sandwiched between the upper and lower molds 11 and 12, and these are bolts 3.
Are fastened together and assembled into a mold. In addition,
Similar to the conventional die, side pieces are attached to both ends of the width of the upper and lower dies by bolt fastening, and both ends of the parallel portion of the resin flow path are closed, but the side pieces are not shown. .
【0014】本発明の金型の組立てにおいて、スペ−サ
2のボルト挿通孔21の位置が各型11(12)のボル
ト孔16(17)の位置に対し、加工上、多少ずれて
も、そのずれを吸収できるように、スペ−サ2のボルト
挿通孔21をボルト3の径に対しやや大きくしてあり、
かかるもとでも、樹脂流路での樹脂流れに支障を来さな
いように、金型を組み立てることが可能であり、通常の
金型加工技術で、スペ−サ2の前側端面221をマニホ−
ルド14のパ−ティング箇所に段差なく合わせ、スペ−
サ2の横側端面〔図1の(イ)における222〕を樹脂流
入孔〔図1の(イ)における13〕のパ−ティング箇所
に段差なく合わせることが可能である。In the die assembly of the present invention, even if the position of the bolt insertion hole 21 of the spacer 2 is slightly deviated from the position of the bolt hole 16 (17) of each mold 11 (12) in processing, The bolt insertion hole 21 of the spacer 2 is slightly larger than the diameter of the bolt 3 so as to absorb the deviation.
Even under such circumstances, it is possible to assemble the mold so as not to hinder the resin flow in the resin flow path, and the front end face 221 of the spacer 2 is connected to the manifold by a normal mold processing technique.
Align the part of the field 14 without any steps and
It is possible to align the lateral end surface [222 of FIG. 1 (A)] of the resin 2 with the part of the resin inflow hole [13 of FIG. 1 (A)] without any step.
【0015】なお、スペ−サ2の前側端面221は樹脂流
路面となり、しかも、シ−ト製品の賦型が行われる樹脂
流路平行部に近く位置することになるので、クロムメッ
キ等により平滑に仕上げることが好ましい。The front end surface 221 of the spacer 2 serves as a resin flow path surface and is located near the resin flow path parallel portion where the sheet product is shaped. Is preferably finished.
【0016】本発明の金型においては、図2に示すよう
に、スペ−サ2の厚みで樹脂流路平行部a(図2のa)
のクリアランスが設定され、上下型11,12間にスペ
−サ2を挾持する際に、スペ−サ2にずれが生じても、
そのずれは水平方向であって、上下型11,12間の間
隔、従って、樹脂流路平行部aのクリアランスには何ら
の影響も来さず、スペ−サ2の厚み精度で樹脂流路平行
部aのクリアランスを設定できる。In the mold of the present invention, as shown in FIG. 2, the resin flow path parallel portion a (a in FIG. 2) is formed according to the thickness of the spacer 2.
Even if the spacer 2 is displaced when the spacer 2 is held between the upper and lower dies 11 and 12,
The deviation is in the horizontal direction and has no effect on the interval between the upper and lower molds 11 and 12, and hence the clearance of the resin flow path parallel portion a, and the spacer 2 can be parallel to the resin flow path with the thickness accuracy of the spacer 2. The clearance of the part a can be set.
【0017】本発明において、スペ−サ2には、ボルト
締結による締め付け圧力のもとでも、厚みを充分に保持
でき、かつ、耐熱性を有し、好ましくは、溶融樹脂に対
し非親和性の材料が使用され、鋼等の金属の他、セラミ
ック、エンジニアリングプラスチックの使用も可能であ
る。In the present invention, the spacer 2 has a sufficient thickness and heat resistance even under the tightening pressure by bolt fastening, and preferably has no affinity for the molten resin. Materials are used, and in addition to metals such as steel, ceramics and engineering plastics can also be used.
【0018】本発明の金型は合成樹脂シ−ト(硬質塩化
ビニル樹脂、軟質塩化ビニル樹脂、塩素化塩化ビニル樹
脂、ポリエチレン、ポリプロピレン、ポリカ−ボネ−
ト、アクリル樹脂、ポリスチレン等のシ−ト)の押出成
形に使用され、そのシ−ト厚みの変更を容易に行うこと
ができる。The mold of the present invention is a synthetic resin sheet (hard vinyl chloride resin, soft vinyl chloride resin, chlorinated vinyl chloride resin, polyethylene, polypropylene, polycarbonate).
It is used for extrusion molding of sheet, acrylic resin, polystyrene, etc., and the thickness of the sheet can be easily changed.
【0019】そのシ−ト厚みの変更は、次の作業手順で
行われる。すなわち、まず、生産ラインの運行を中断
し、押出機を停止する、押出機から金型を取外し、所
定の金型解体場所に移動させる、金型を上下型に解体
分解し、既使用のスペ−サを取り除き、各型の付着樹脂
を除去してクリ−ニングを行う、次いで、これらの上
下型をその間に所定厚みの新たなスペ−サを挾み、これ
らをボルトで締結する、金型を押出機に連結して、生
産再開の準備を行う、押出機を再駆動し、生産を再開
する、等の作業手順で行われる。The thickness of the sheet is changed in the following work procedure. That is, first, the operation of the production line is interrupted, the extruder is stopped, the mold is removed from the extruder and moved to a predetermined mold dismantling place, the mold is disassembled into upper and lower molds, and the existing space is used. -The mold is removed by removing the spacer, removing the resin adhered to each mold and cleaning it, then sandwiching a new spacer having a predetermined thickness between these upper and lower molds and fastening them with bolts. Is connected to an extruder to prepare for restarting production, the extruder is re-driven, and production is restarted.
【0020】而して、従来のリップの変更により製品の
シ−ト厚みを変える場合に較べ、Dの取替えのための多
数本のボルト(通常、約70本)の着脱が不要であり、
また、樹脂流路平行部クリアランスを調整しつつそのク
リアランスを所定値に設定することが不要であって、上
型と下型との間に所定厚みのスペ−サを挾み、上下型の
ボルト締結を行うだけでよいから、極めて短時間で製品
のシ−ト厚みを変更できる。As compared with the conventional case where the sheet thickness is changed by changing the lip, it is not necessary to attach and detach a large number of bolts (usually about 70) for replacing D.
Further, it is not necessary to adjust the clearance of the parallel portion of the resin flow path and to set the clearance to a predetermined value, and a spacer having a predetermined thickness is sandwiched between the upper die and the lower die, and the upper and lower bolts are clamped. Since only fastening is required, the sheet thickness of the product can be changed in an extremely short time.
【0021】しかも、平行部クリアランスを、ボルトの
締結さえ完全に行えば、確実にスペ−サの厚み精度で平
行部クリアランスを所定値に設定でき、再現性も良好で
ある。Moreover, if the clearance of the parallel portion is completely fastened even by fastening the bolts, the clearance of the parallel portion can be reliably set to a predetermined value with the thickness accuracy of the spacer, and the reproducibility is also good.
【0022】本発明の金型においては、製品のシ−ト厚
みに応じ、各種厚みのスペ−サを用意しておくことによ
り各種厚さの合成樹脂シ−トを製造できる。例えば、樹
脂流路平行部のクリアランスが4.5mmの上型・下型
のみの金型では、金型外でのロ−ルギャップの調整、引
取り速度の調整により、3〜4mm厚みのシ−トの製造
が可能であるが本発明により、厚み2.0mmのスペ−
サを上下型間に挾持させれば、4〜7mm厚みのシ−ト
の製造が可能となり、厚み6.0mmのスペ−サを上下
型間に挾持させれば、7〜10mm厚みのシ−トの製造
が可能となる。In the mold of the present invention, synthetic resin sheets of various thicknesses can be manufactured by preparing spacers of various thicknesses according to the sheet thickness of the product. For example, in the case of a mold having only the upper mold and the lower mold having a clearance of 4.5 mm in the resin flow path parallel portion, a sheet having a thickness of 3 to 4 mm is adjusted by adjusting the roll gap outside the mold and adjusting the take-up speed. However, according to the present invention, a spacer having a thickness of 2.0 mm can be manufactured.
If the spacer is held between the upper and lower dies, a sheet having a thickness of 4 to 7 mm can be manufactured. If the spacer having a thickness of 6.0 mm is held between the upper and lower dies, the sheet having a thickness of 7 to 10 mm can be produced. Can be manufactured.
【0023】なお、本発明の金型において、リップ部を
摩耗等に対し、交換可能なように着脱自在に取り付ける
ことができることは、云うまでもない。Needless to say, in the mold of the present invention, the lip portion can be detachably attached so as to be replaceable against wear or the like.
【0024】[0024]
【発明の効果】本発明の合成樹脂シ−ト押出成形用金型
は、上述した通りの構成であり、樹脂流路平行部(ラン
ド)の製品シ−ト厚みに応じたクリアランス変更を、ス
ペ−サを挾んだ上下型間の締結ボルトの螺脱作業のみで
行うことができ、従来金型でのリップ交換が不要であ
り、製品シ−ト厚みの変更に際し、ボルトの螺脱個数を
著しく低減でき、また、クリアランスを所定値に設定す
る際でのクリアランス調整が不要であり、製品シ−ト厚
み変更に要する作業時間の短縮、工数の低減を図ること
ができる。EFFECT OF THE INVENTION The synthetic resin sheet extrusion molding die of the present invention is constructed as described above, and the clearance change depending on the product sheet thickness of the resin flow path parallel portion (land) can be changed. -It can be done only by unscrewing the fastening bolts between the upper and lower molds that sandwich the tool, and it is not necessary to replace the lip with the conventional mold, and the number of unscrewed bolts can be changed when changing the thickness of the product sheet. It is possible to remarkably reduce the clearance, and it is not necessary to adjust the clearance when setting the clearance to a predetermined value, so that the working time required for changing the thickness of the product sheet and the number of steps can be reduced.
【0025】しかも、上下型の締結ボルトを完全に締め
付ければ、必然的にクリアランスをスペ−サの厚み精度
で所定寸法のクリアランスを設定でき、再現性に優れ、
製品寸法の安定性を確保できる。In addition, if the upper and lower fastening bolts are completely tightened, the clearance can be set to a predetermined size with the thickness accuracy of the spacer, and the reproducibility is excellent.
The stability of product dimensions can be secured.
【0026】更に、スペ−サが平板状であって、リップ
に較べ加工費が低廉であり、コスト的にも有利である。Further, since the spacer is flat, the processing cost is lower than that of the lip, which is advantageous in terms of cost.
【図面の簡単な説明】[Brief description of drawings]
【図1】図1の(イ)は本発明の金型を構成する主な部
材を示す斜視図、図1の(ロ)は、図1の(イ)におけ
るロ−ロ断面図、図1の(ハ)は図1の(イ)の部材で
構成される樹脂流路を示す説明図である。1 (a) is a perspective view showing main members constituting a mold of the present invention, FIG. 1 (b) is a cross-sectional view taken along the line of FIG. 1 (a). (C) is an explanatory view showing a resin flow path constituted by the member of (A) of FIG. 1.
【図2】本発明の実施例を示す説明図である。FIG. 2 is an explanatory diagram showing an example of the present invention.
【図3】図3の(イ)は従来例を示す説明図、図3の
(ロ)は図3の(イ)におけるロ−ロ断面図である。3 (A) is an explanatory view showing a conventional example, and FIG. 3 (B) is a cross-sectional view taken along line (A) of FIG.
11 下型 12 上型 13 樹脂流入孔 14 マニホ−ルド a 平行部 2 スペ−サ 11 Lower mold 12 Upper mold 13 Resin inflow hole 14 Manifold a Parallel part 2 Spacer
Claims (1)
孔、マニホ−ルド並びに平行部からなる樹脂流路を有す
る金型の合せ面に、上記平行部のクリアランスを設定す
るスペ−サが挾持されていることを特徴とする合成樹脂
シ−ト押出成形用金型。1. A spacer for setting a clearance of the parallel portion on a mating surface of a mold which is divided into upper and lower parts and has a resin flow path composed of a resin inflow hole, a manifold and a parallel portion between the upper and lower portions. A synthetic resin sheet extrusion molding die which is held.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5149094A JPH071547A (en) | 1993-06-21 | 1993-06-21 | Metal mold for extrusion molding of synthetic resin sheet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5149094A JPH071547A (en) | 1993-06-21 | 1993-06-21 | Metal mold for extrusion molding of synthetic resin sheet |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH071547A true JPH071547A (en) | 1995-01-06 |
Family
ID=15467568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5149094A Pending JPH071547A (en) | 1993-06-21 | 1993-06-21 | Metal mold for extrusion molding of synthetic resin sheet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH071547A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008178818A (en) * | 2007-01-25 | 2008-08-07 | Chugai Ro Co Ltd | Slit die and shim |
US7728238B2 (en) | 2007-04-12 | 2010-06-01 | Yamaichi Electronics Co., Ltd. | Data setter |
-
1993
- 1993-06-21 JP JP5149094A patent/JPH071547A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008178818A (en) * | 2007-01-25 | 2008-08-07 | Chugai Ro Co Ltd | Slit die and shim |
US7728238B2 (en) | 2007-04-12 | 2010-06-01 | Yamaichi Electronics Co., Ltd. | Data setter |
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