JPH0375334B2 - - Google Patents

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Publication number
JPH0375334B2
JPH0375334B2 JP59016600A JP1660084A JPH0375334B2 JP H0375334 B2 JPH0375334 B2 JP H0375334B2 JP 59016600 A JP59016600 A JP 59016600A JP 1660084 A JP1660084 A JP 1660084A JP H0375334 B2 JPH0375334 B2 JP H0375334B2
Authority
JP
Japan
Prior art keywords
sizing former
extrusion
die device
extrusion die
mold
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
Application number
JP59016600A
Other languages
Japanese (ja)
Other versions
JPS60159029A (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP59016600A priority Critical patent/JPS60159029A/en
Publication of JPS60159029A publication Critical patent/JPS60159029A/en
Publication of JPH0375334B2 publication Critical patent/JPH0375334B2/ja
Granted legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0041—Crystalline

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は、合成樹脂成形用押出ダイ装置に係
り、詳しくは６ナイロン、ポリアセタール、ポリ
ブチレンテレフタレート、ポリエチレンテレフタ
レート等の高結晶性の熱可塑性樹脂ペレツトから
種々の形状を持つ成形体を容易に成形できる合成
樹脂成形用押出ダイ装置に関するものである。 一般に高結晶性の熱可塑性樹脂ペレツトを棒
状、板状又は異形状に押出成形するために使用さ
れるスクリユー押出装置は、材料供給用ホツパ
ー、加熱装置を具備したシリンダー、該シリンダ
ー中に挿入され回転運動するスクリユーからなる
スクリユー押出機の先端に加熱装置付の押出ダイ
装置が装着され、該ダイ装置の先端部には水冷ジ
ヤケツト付のサイジングフオーマー部が取付けら
れている。そして、かかる押出装置には押出成形
品を水冷して形状を保持させるための水槽そして
押出成形品の中心部のひけを解消させるための背
圧用引取ゴムロールも順々配置されている。 ところが、上記押出装置を使用して高結晶性樹
脂ペレツトを押出成形する場合、押出成形品の中
心部に発生する鬆を解消するために引取ゴムロー
ルによつて押出成形品の押え圧力を高くして押出
し樹脂圧を高くする必要があるが、特に高速押出
時高背圧にした場合押出成形品が押出ダイ装置の
サイジングフオーマーネツク部で直径方向へ膨張
し同部内面へ固着するために連続して押出成形す
るのが困難であつた。 本発明はこのような欠点を改善し、６ナイロ
ン、6.6ナイロン、ポリアセタール、ポリブチレ
ンテレフタレート、ポリエチレンテレフタレート
等の高結晶性樹脂をスクリユー押出成形するに際
し、押出ダイのサイジングフオーマーネツク部で
溶融樹脂が高背圧のために発生する固着現象を抑
制して押出成形品をスムーズに押出し、しかも鬆
のない成形体を連続に成形できる合成樹脂成形用
押出ダイ装置を提供するものであり、その要旨と
するところはスクリユー押出機に連結される押出
ダイ装置であつて、該押出ダイ装置が外面に加熱
装置を具備しかつ内部に押出成形体の通路を有す
る金型と該金型に連結され冷却ジヤケツトを装着
したサイジングフオーマー部から構成され、しか
も上記サイジングフオーマー部の入口領域に相当
するサイジングフオーマーネツク部の内面が前記
金型の通路と連通し、かつ成形体の押出方向へ拡
がる少なくとも１つのテーパー面の組合せから構
成され、前記サイジングフオーマー部の通路内周
面に油注孔に連通した溝を刻設した合成樹脂成形
用押出ダイ装置にある。 次に本発明を図面を用いて説明する。 第１図は本発明に係る合成樹脂成形押出ダイ装
置の縦断面図であり、該ダイ装置１は、金型２と
これに連通したサイジングフオーマー部３の２つ
から構成されており、該金型２は外部表面に加熱
装置４を具備していると共に、内部において押出
成形体の通路５を有しているが、前記通路５は途
中で径を細くした領域と、また径を大きくした３
段階の内径をもつており、一方、サイジングフオ
ーマー部３は金型２の出口に隣接するサイジング
フオーマーネツク部６と周囲に冷却ジヤケツト７
を具備するサイジングフオーマー本体８とからな
り、また上記サイジングフオーマーネツク部６と
サイジングフオーマー本体８との境界には周囲に
冷却ジヤケツト９を付着せしめた結合部材１０が
設けられ前記ネツク部６と本体８とを連結してい
る。 しかして、前記サイジングフオーマー部３を構
成しているサイジングフオーマーネツク部６の内
部は角度θ1、（20〜75°）のテーパー面でもつ金型
通路５の出口と連通していると共に成形体の押出
方向（第１図の矢印参照）に拡がる角度θ2（１〜
20°）のテーパー面１１を有し成形体の摩擦抵抗
を分散低下させている。一方、表面においては金
型２近くの領域にフランジ部１２が反対方向にネ
ジ部１３が存在しており、フランジ部１２の外側
にリング体１４が挿入されボルト１５によつて金
型２の固着されている。 尚、金型２とサイジングフオーマーネツク部６
の内部通路の境界は滑らな曲面にした方が好まし
く、しかもサイジングフオーマーネツク部６の内
面に設けたテーパー面１１は複数個組合せてもよ
い。 また、前記サイジングフオーマーネツク部６は
サイジングフオーマー部３全長の1/3以内である
が、サイジングフオーマー部３の先端部と冷却ジ
ヤケツト９間の距離がサイジングフオーマー部３
全長の1/3以内であり、特にこの間で押出成形体
が半溶融状態となつて固着し易いためである。 前記サイジングフオーマーネツク部６とサイジ
ングフオーマー本体８を連結している結合部材１
０は、サイジングフオーマーネツク部６表面の一
部分に設けたネジ部１３に捩込まれ、更にボルト
１６によつてサイジングフオーマー本体８と連結
している。また、該結合部材１０の中には油の貯
蔵室１７とこれからサイジングフオーマー部３の
通路１８へ通じる油注孔１９があり、更に該通路
１８の円周面にも注入された油が全周に均一分散
するような溝２０も設けられ、油を成形体の表面
に付着せしめることにより成形体の押出しを一層
容易にしている。 尚、図中２１は結合部材１０の外側に取付けら
れた冷却ジヤケツト９の中に設けられた油の投入
口があり、前記油の貯蔵室１７に直結している。 前記サイジングフオーマー本体３は同一の径を
もつ押出成形体の通路１８を有し、またその外周
には長手方向に沿つて移動可能な冷却ジヤケツト
７が装着していると共にかかる冷却ジヤケツト７
内に水、油等の冷却用の液体を循環させるための
液体の入口２２と出口２３が設けられている。 このような押出ダイ装置１は、第２図に示され
ているように表面に加熱装置２５，２６，２７を
具備し、端部に原料を投入するホツパー２８を有
する円筒形のシリンダー２９内に、スクリユー３
０を挿入して構成されるスクリユー押出機３１の
出口にアダプタープレートＡを介してボルト、ナ
ツトで連結され、そして押出ダイ装置１の入口に
は複数個の穴をもつブレーカープレート３２が挿
入され溶融樹脂の流れを調整している。更にアダ
プタープレートＡの前方には樹脂圧計Ｂが装着さ
れている。 また、スクリユー押出機３１に連結された押出
ダイ装置１の出口前方には水槽３３が設けられて
押出成形体３４を冷却固化し、更に前方にはゴム
ロール３５，３６があり押出成形体３４に適切な
背圧を与えて連続的に成形体を押出すようになつ
ている。 このような押出ダイ装置１をスクリユー押出機
３１に連結して使用すると、押出ダイ装置１の金
型２から押出された半溶融状態の成形体は、サイ
ジングフオーマーネツク部６で何ら固着せずにス
ムーズに押出され、しかも押出成形体に背圧を付
与してもこれに関して何ら影響を受けるものでは
ない。 次に、本発明に係る押出ダイ装置の使用効果を
確認するため、以下に具体的な実施例を詳述す
る。 実施例 １ 内径が65mm、長さ2000mmのシリンダー中にスク
リユーを挿入した日本製鋼所社製Ｐ−65−22AB
型スクリユー押出機に、第１図に示される如くテ
ーパー角度θ1，θ2を夫々60°、8°とした本発明に係
る押出ダイを連結し、その前方に水槽および２つ
のゴムロールを配置したスクリユー押出成形装置
（第２図に示される）を用いて第１表に示される
押出条件でポリアセタールコポリマーペレツト
（商品名；ウルトラフオルムH2320；BASF社製）
を丸棒に押出成形したところ、たとえ樹脂圧力が
30〜50Kg／cm2でも押出成形体はサイジングフオー
マーネツク部内面へ固着せず、第３図に示される
ように外径100mmの丸棒が連続的に押出成形でき
た。押出成形体は外観および直円度において良好
で、中心部において鬆を有していなかつた。 The present invention relates to an extrusion die device for molding synthetic resins, and more specifically, it is capable of easily molding molded bodies of various shapes from highly crystalline thermoplastic resin pellets such as nylon 6, polyacetal, polybutylene terephthalate, and polyethylene terephthalate. This invention relates to an extrusion die device for molding synthetic resin. Screw extrusion equipment, which is generally used to extrude highly crystalline thermoplastic resin pellets into rods, plates, or irregular shapes, consists of a material feeding hopper, a cylinder equipped with a heating device, and a cylinder that is inserted into the cylinder and rotated. An extrusion die device with a heating device is attached to the tip of a screw extruder consisting of a moving screw, and a sizing former portion with a water cooling jacket is attached to the tip of the die device. The extrusion device is also equipped with a water tank for water-cooling the extruded product to maintain its shape, and a back pressure take-up rubber roll for eliminating sink marks in the center of the extruded product. However, when extruding high-crystalline resin pellets using the above-mentioned extrusion equipment, the pressing pressure of the extrusion molded product is increased using a take-up rubber roll in order to eliminate the gap that occurs in the center of the extrusion molded product. It is necessary to increase the extrusion resin pressure, but especially when high back pressure is used during high-speed extrusion, the extruded product expands in the diametrical direction at the sizing former neck part of the extrusion die device and adheres to the inner surface of the same part. It was difficult to extrude it. The present invention improves these drawbacks, and when screw extruding highly crystalline resins such as nylon 6, nylon 6.6, polyacetal, polybutylene terephthalate, and polyethylene terephthalate, the molten resin is The purpose of the present invention is to provide an extrusion die device for synthetic resin molding that can smoothly extrude extruded products by suppressing the sticking phenomenon that occurs due to high back pressure, and can continuously mold molded products without gaps. The extrusion die device is connected to the screw extruder, and the extrusion die device has a heating device on the outside and a mold having a passage for the extruded product inside, and a cooling jacket connected to the mold. at least one sizing former section equipped with a sizing former section, the inner surface of the sizing former neck section corresponding to the inlet region of the sizing former section communicating with the passage of the mold and expanding in the extrusion direction of the molded body. The extrusion die device for molding synthetic resin has a groove formed of a combination of two tapered surfaces, and a groove communicating with an oil filling hole is carved in the inner circumferential surface of the passage of the sizing former part. Next, the present invention will be explained using the drawings. FIG. 1 is a longitudinal cross-sectional view of a synthetic resin molding extrusion die device according to the present invention. The mold 2 is equipped with a heating device 4 on its outer surface, and has a passage 5 for the extruded product inside, and the passage 5 has a region with a narrower diameter in the middle and a region with a larger diameter. 3
The sizing former part 3 has a stepped inner diameter, while the sizing former part 3 has a sizing former neck part 6 adjacent to the outlet of the mold 2 and a cooling jacket 7 around it.
A connecting member 10 to which a cooling jacket 9 is attached around the periphery is provided at the boundary between the sizing former body 8 and the sizing former body 8. and the main body 8 are connected. The inside of the sizing former neck part 6 constituting the sizing former part 3 communicates with the outlet of the mold passage 5 having a tapered surface at an angle θ 1 (20 to 75°). The angle θ 2 (1~
The tapered surface 11 has an angle of 20°) to disperse and reduce the frictional resistance of the molded body. On the other hand, on the surface, there is a threaded part 13 in the opposite direction of the flange part 12 in the area near the mold 2, and a ring body 14 is inserted on the outside of the flange part 12, and the mold 2 is fixed by bolts 15. has been done. In addition, the mold 2 and the sizing former neck part 6
It is preferable that the boundary of the internal passage be a smooth curved surface, and moreover, a plurality of tapered surfaces 11 provided on the inner surface of the sizing former network portion 6 may be combined. Furthermore, although the sizing former neck portion 6 is within 1/3 of the total length of the sizing former portion 3, the distance between the tip of the sizing former portion 3 and the cooling jacket 9 is longer than the sizing former portion 3.
This is within 1/3 of the total length, and this is because the extruded product becomes semi-molten and tends to stick during this period. A connecting member 1 connecting the sizing former neck portion 6 and the sizing former body 8
0 is screwed into a threaded portion 13 provided on a portion of the surface of the sizing former neck portion 6, and further connected to the sizing former body 8 by a bolt 16. Further, in the coupling member 10, there is an oil storage chamber 17 and an oil injection hole 19 communicating from the oil storage chamber 17 to the passage 18 of the sizing former part 3. Grooves 20 are also provided to uniformly distribute the oil around the periphery, thereby making it easier to extrude the molded product by adhering oil to the surface of the molded product. In the figure, reference numeral 21 denotes an oil inlet provided in the cooling jacket 9 attached to the outside of the coupling member 10, and is directly connected to the oil storage chamber 17. The sizing former body 3 has a passage 18 made of an extruded body having the same diameter, and a cooling jacket 7 movable along the longitudinal direction is attached to the outer periphery of the passage 18.
A liquid inlet 22 and an outlet 23 are provided for circulating a cooling liquid such as water or oil inside. As shown in FIG. 2, such an extrusion die device 1 is equipped with heating devices 25, 26, and 27 on the surface and is housed in a cylindrical cylinder 29 having a hopper 28 at the end into which raw materials are introduced. , Screw 3
The screw extruder 31 is connected to the outlet of the screw extruder 31 by inserting the screw extruder 31 through an adapter plate A with bolts and nuts, and a breaker plate 32 having a plurality of holes is inserted into the inlet of the extrusion die device 1 to melt the melt. Adjusts the flow of resin. Furthermore, a resin pressure gauge B is attached to the front of the adapter plate A. In addition, a water tank 33 is provided in front of the outlet of the extrusion die device 1 connected to the screw extruder 31 to cool and solidify the extrusion molded product 34, and rubber rolls 35 and 36 are further provided in front of the extrusion molded product 34 to suit the extrusion molded product 34. The molded body is continuously extruded by applying a certain amount of back pressure. When such an extrusion die device 1 is used in conjunction with the screw extruder 31, the semi-molten molded product extruded from the mold 2 of the extrusion die device 1 does not stick at all at the sizing former neck portion 6. It is extruded smoothly, and even if back pressure is applied to the extruded product, this is not affected in any way. Next, in order to confirm the effects of using the extrusion die device according to the present invention, specific examples will be described in detail below. Example 1 P-65-22AB manufactured by Japan Steel Works, Ltd. with a screw inserted into a cylinder with an inner diameter of 65 mm and a length of 2000 mm
An extrusion die according to the present invention with taper angles θ 1 and θ 2 of 60° and 8°, respectively, as shown in FIG. 1, was connected to the screw extruder, and a water tank and two rubber rolls were placed in front of it. Polyacetal copolymer pellets (trade name: Ultraform H2320; manufactured by BASF) were extruded using a screw extrusion device (shown in Figure 2) under the extrusion conditions shown in Table 1.
When extruded into a round bar, even if the resin pressure
Even at 30 to 50 kg/cm 2 , the extruded product did not adhere to the inner surface of the sizing former neck, and a round bar with an outer diameter of 100 mm could be continuously extruded as shown in FIG. The extruded product had good appearance and roundness, and had no voids in the center.

【表】【table】

【表】 ＊ 図番
比較例 １ サイジングフオーマーネツク部内面のテーパ部
をθ2＝0°とした以外は前記実施例１と同様な条件
でポリアセタールコポリマーペレツトをスクリユ
ー押出によつて丸棒の成形を試みたところ、樹脂
圧30Kg／cm2以上では押出樹脂がサイジングフオー
マーネツク部に固着し連続押出ができなくなつた
（第４図参照）。また、樹脂圧が30Kg／cm2以下とな
るよう引取ロール圧力を調節して背圧を低くすれ
ば連続押出が可能であつたが、押出された丸棒の
中心部に直径約５mm程度の鬆が発生した。 実施例 ２ サイジングフオーマーネツク部のテーパー角度
θを3°とした以外は実施例１と同じスクリユー押
出成形装置を用いてモノマーキヤストナイロン
（三ツ星ベルト社製；三ツ星キヤストナイロン
NA）より再生した６ナイロンペレツトを丸棒に
押出成形したところ、サイジングフオーマーネツ
ク部内面への固着現象がなく、樹脂圧が10〜20
Kg／cm2の範囲で外径100mmの丸棒が連続的に押出
成形できた。押出成形体の外観及び真円度は良好
でかつ丸棒断面の中心部には鬆は存在しなかつ
た。 第２表に押出条件を示す。[Table] * Drawing number comparison example 1 Polyacetal copolymer pellets were extruded into round bars under the same conditions as in Example 1, except that the tapered part on the inner surface of the sizing former neck was set at θ 2 = 0°. When molding was attempted, if the resin pressure exceeded 30 kg/cm 2 , the extruded resin would stick to the sizing former neck, making continuous extrusion impossible (see Figure 4). Continuous extrusion was possible by adjusting the take-up roll pressure to lower the back pressure so that the resin pressure was 30 kg/cm 2 or less, but a hole with a diameter of about 5 mm was found in the center of the extruded round bar. There has occurred. Example 2 Monomer cast nylon (manufactured by Mitsuboshi Belting Co., Ltd.; Mitsuboshi Cast Nylon) was manufactured using the same screw extrusion molding apparatus as in Example 1 except that the taper angle θ of the sizing former neck part was set to 3°.
When 6 nylon pellets recycled from NA) were extruded into round bars, there was no sticking phenomenon to the inner surface of the sizing former neck, and the resin pressure was 10 to 20.
A round bar with an outer diameter of 100 mm could be continuously extruded within the Kg/cm 2 range. The external appearance and roundness of the extruded product were good, and there was no hole in the center of the cross section of the round bar. Table 2 shows the extrusion conditions.

【表】【table】

【表】 ＊ 図番
比較例 ２ サイジングフオーマーネツク部内面のテーパー
部をθ2＝０とした以外は前記実施例２と全く同様
な条件でモノマーキヤストナイロン再生６ナイロ
ンペレツトをスクリユー押出成形して丸棒の成形
を試みたところ、樹脂圧10Kg／cm2以上では押出樹
脂がサイジングフオーマーネツク部に固着し連続
押出ができなくなつた。また、樹脂圧が10Kg／cm2
以下となるよう引取ロール圧力を調節して背圧を
低くすれば連続押出が可能であつたが、押出成形
された丸棒断面の中心部に直径約10mm程度の鬆が
発生した。 以上のように本発明の押出ダイ装置は、樹脂の
種類に関係なく高背圧力下のもとで連続して押出
成形でき、しかも成形体の内部にも鬆が発生しな
くなる等の効果を有している。[Table] * Drawing number comparison example 2 Monomer cast nylon regenerated 6 nylon pellets were screw-extruded under the same conditions as in Example 2 except that the tapered part on the inner surface of the sizing former neck was set to θ 2 =0. When we tried to mold a round bar using resin pressure of 10 kg/cm 2 or higher, the extruded resin stuck to the sizing former neck and continuous extrusion became impossible. Also, the resin pressure is 10Kg/cm 2
Continuous extrusion was possible by adjusting the take-up roll pressure to lower the back pressure as follows, but a gap with a diameter of about 10 mm was generated in the center of the cross section of the extruded round bar. As described above, the extrusion die device of the present invention can perform continuous extrusion molding under high back pressure regardless of the type of resin, and has the effect of preventing the formation of cracks inside the molded product. are doing.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は、本発明に係る合成樹脂成形用押出ダ
イ装置の縦断面図、第２図は第１図に示される押
出ダイ装置を用いたスクリユー押出成形装置の断
面図、第３図は本発明に係る押出ダイ装置を使用
した場合の押出経時と樹脂圧の関係、そして第４
図は従来の押出ダイ装置を使用した場合の押出経
時と樹脂圧との関係を示す。 １……押出ダイ装置、２……金型、３……サイ
ジングフオーマー部、４……加熱装置、５，８…
…通路、６……サイジングフオーマーネツク部、
７，９……冷却ジヤケツト、１０……結合部材、
１１……テーパー面。 FIG. 1 is a longitudinal cross-sectional view of an extrusion die device for molding synthetic resin according to the present invention, FIG. 2 is a cross-sectional view of a screw extrusion molding device using the extrusion die device shown in FIG. 1, and FIG. Relationship between extrusion time and resin pressure when using the extrusion die device according to the invention, and the fourth
The figure shows the relationship between extrusion time and resin pressure when a conventional extrusion die device is used. 1... Extrusion die device, 2... Mold, 3... Sizing former section, 4... Heating device, 5, 8...
...Aisle, 6...Sizing former network section,
7, 9...cooling jacket, 10...coupling member,
11...Tapered surface.

Claims (1)

【特許請求の範囲】[Claims] １ スクリユー押出機に連結される押出ダイ装置
であつて、該押出ダイ装置が外面に加熱装置を具
備しかつ内部に押出成形体の通路を有する金型
と、該金型に連結され冷却ジヤケツトを装着した
サイジングフオーマー部から構成され、しかも上
記サイジングフオーマー部の入口領域に相当する
サイジングフオーマーネツク部の内面が前記金型
の通路と連通し、かつ成形体の押出方向へ拡がる
少なくとも１つのテーパー面の組合せからなり、
更に前記サイジングフオーマー部の通路内周面に
油注孔に連通した溝を刻設したことを特徴とする
合成樹脂成形用押出ダイ装置。1 An extrusion die device connected to a screw extruder, the extrusion die device comprising a mold having a heating device on the outside and a passage for the extruded product inside, and a cooling jacket connected to the mold. At least one at least one sizing former neck, which is composed of the attached sizing former part, and in which the inner surface of the sizing former neck part corresponding to the inlet area of the sizing former part communicates with the passage of the mold, and expands in the extrusion direction of the molded article. Consisting of a combination of tapered surfaces,
An extrusion die device for molding a synthetic resin, further comprising: a groove communicating with an oil injection hole formed on the inner circumferential surface of the passage of the sizing former portion.
JP59016600A 1984-01-30 1984-01-30 Synthetic resin extrusion die device Granted JPS60159029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59016600A JPS60159029A (en) 1984-01-30 1984-01-30 Synthetic resin extrusion die device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59016600A JPS60159029A (en) 1984-01-30 1984-01-30 Synthetic resin extrusion die device

Publications (2)

Publication Number Publication Date
JPS60159029A JPS60159029A (en) 1985-08-20
JPH0375334B2 true JPH0375334B2 (en) 1991-11-29

Family

ID=11920786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59016600A Granted JPS60159029A (en) 1984-01-30 1984-01-30 Synthetic resin extrusion die device

Country Status (1)

Country Link
JP (1) JPS60159029A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7874826B2 (en) * 2006-10-11 2011-01-25 Xerox Corporation Solid ink stick fabrication by extrusion, roll forming and swaging
US7968035B2 (en) * 2006-10-11 2011-06-28 Xerox Corporation Forged ink stick fabrication from in-line extrusion
US8714952B2 (en) * 2011-06-13 2014-05-06 Floracraft Corp. System and method for manufacturing cylindrical foam articles
CN108407256B (en) * 2018-03-28 2020-06-09 大连理工模具研究所有限公司 Nylon rod extrusion die with stock mould structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821697U (en) * 1981-08-03 1983-02-10 株式会社晋和 gate structure

Also Published As

Publication number Publication date
JPS60159029A (en) 1985-08-20

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