JPH07115401B2 - Extrusion mold - Google Patents
Extrusion moldInfo
- Publication number
- JPH07115401B2 JPH07115401B2 JP62294388A JP29438887A JPH07115401B2 JP H07115401 B2 JPH07115401 B2 JP H07115401B2 JP 62294388 A JP62294388 A JP 62294388A JP 29438887 A JP29438887 A JP 29438887A JP H07115401 B2 JPH07115401 B2 JP H07115401B2
- Authority
- JP
- Japan
- Prior art keywords
- core
- resin
- bridge
- synthetic resin
- extrusion molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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
- B29C48/03—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
- B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、押出成形金型で、特にその出口部分の構造に
関する。Description: TECHNICAL FIELD The present invention relates to an extrusion molding die, and more particularly to the structure of an outlet portion thereof.
（従来の技術） 従来の押出成形金型としては、例えば第５図に示されて
いるようなものが知られている。(Prior Art) As a conventional extrusion molding die, for example, one shown in FIG. 5 is known.
この従来の押出成形金型は、ダイリング01とコア02とを
備え、ダイリング01の最終平行部011とコア02との間に
樹脂を所望の形状に整流賦形するスリット部03が形成さ
れており、コア02はこのスリット部03より奥の樹脂導入
部04まで延設されていて、その樹脂導入部04でブリッジ
05によってダイリング01に連結されていた。This conventional extrusion molding die includes a die ring 01 and a core 02, and a slit portion 03 for straightening and shaping a resin into a desired shape is formed between the final parallel portion 011 and the core 02 of the die ring 01. The core 02 extends from the slit 03 to the resin introduction portion 04 at the back, and the resin introduction portion 04 bridges the core 02.
It was connected to the die ring 01 by 05.
（発明が解決しようとする問題点） しかしながら、このような従来の押出成形金型であって
は、コア02が、スリット部03より奥の樹脂導入部04でブ
リッジ05によって連結されていたことにより、コア02の
ブリッジ05から出口端部までの長さＬを、最終平行部01
1の長さＬ′よりも長くしなければならないため、特に
コア02の断面積が小さい場合には、コア02のたわみ強度
が弱いものであった。(Problems to be Solved by the Invention) However, in such a conventional extrusion molding die, since the core 02 is connected by the bridge 05 at the resin introducing portion 04 deeper than the slit portion 03, , The length L from the bridge 05 of the core 02 to the exit end is determined by the final parallel portion 01
Since the length must be longer than the length L ′ of 1, the flexural strength of the core 02 was weak, especially when the cross-sectional area of the core 02 was small.
ところでスリット部03を流動する樹脂によってコア02は
内圧力を受けることになるが、コア02のたわみ強度が弱
いことにより、この内圧力分布の微少な差異によってコ
ア02にたわみが生じてしまう。このようなコア02のたわ
みによってスリット部03の幅が不均一になり、環状部の
偏肉度が大きい押出品が成形されるという問題点があっ
た。そして、このように環状部の偏肉度が大きな成形品
は、切断時にはさみ割れし易いものであった（第４頁の
表１参照）。By the way, the core 02 is subjected to an internal pressure by the resin flowing through the slit 03, but the core 02 has a weak flexural strength, so that the core 02 is flexed due to this slight difference in the internal pressure distribution. Due to such bending of the core 02, the width of the slit portion 03 becomes nonuniform, and there is a problem that an extruded product having a large degree of uneven thickness of the annular portion is formed. Then, the molded product having such a large degree of uneven thickness of the annular portion was likely to be scissor cracked at the time of cutting (see Table 1 on page 4).
（問題点を解決するための手段） 本発明は上述のような問題点を解決することを目的とし
てなされたものであり、本発明の要旨は、合成樹脂の加
熱分解を阻止する加工助剤を含む配合樹脂を使用して、
環状部を有する押出品を成形する押出成形金型であっ
て、ダイリングと、該ダイリングにブリッジを介して連
結されているコアとを備え、ダイリングの最終平行部と
コアとの間に、樹脂を所望の環形状に整流賦形するスリ
ット部が形成され、該スリット部の入口近傍に前記ブリ
ッジが配設されている押出成形金型に存する。(Means for Solving Problems) The present invention has been made for the purpose of solving the above problems, and the gist of the present invention is to provide a processing aid for preventing thermal decomposition of a synthetic resin. Using compounded resin containing
An extrusion molding die for molding an extruded product having an annular portion, comprising a die ring and a core connected to the die ring via a bridge, and between the final parallel portion of the die ring and the core. The present invention resides in an extrusion molding die in which a slit portion for straightening and shaping a resin into a desired ring shape is formed, and the bridge is arranged near the entrance of the slit portion.
（作用） 本発明の押出成形金型では、ブリッジがスリット部の入
口近傍に配設されているので、ブリッジから出口側端部
までのコアの長さを、最終平行部の長さより短くするこ
とができ、コアのたわみ強度を強化することができる。
即ち、スリット部を流動する樹脂の内圧力分布の微小な
差異等によるコアのたわみを防止することができ、スリ
ット部の幅を均一に維持することができる。(Operation) In the extrusion molding die of the present invention, since the bridge is arranged in the vicinity of the entrance of the slit portion, the length of the core from the bridge to the end on the exit side should be shorter than the length of the final parallel portion. It is possible to enhance the flexural strength of the core.
That is, it is possible to prevent the core from bending due to a minute difference in the internal pressure distribution of the resin flowing in the slit portion, and it is possible to maintain the width of the slit portion uniform.
しかも、合成樹脂の加熱分解を阻止する加工助剤を含む
配合樹脂を使用することにより、合成樹脂の加熱温度を
通常より高くでき、このため、軟化溶融された合成樹脂
の流動状態が向上することになる。この結果、ブリッジ
を通過した痕跡が押出品の表面に残らず、高い光沢度を
有する外観的に優れた押出品が得られることになる。Moreover, by using a compounded resin containing a processing aid that prevents thermal decomposition of the synthetic resin, the heating temperature of the synthetic resin can be made higher than usual, and therefore, the flow state of the softened and melted synthetic resin is improved. become. As a result, no trace of passing through the bridge remains on the surface of the extruded product, and an extruded product having a high glossiness and excellent in appearance is obtained.
（実施例） 以下、本発明の実施例を図面により詳述する。(Examples) Examples of the present invention will be described in detail below with reference to the drawings.
まず、第１図〜第４図に示す実施例について、その構成
を説明する。First, the structure of the embodiment shown in FIGS. 1 to 4 will be described.
第３図に示すＡは、環状部を有する押出品を成形する押
出成形装置であって、ホッパー11、スクリュー12、バレ
ル13、ヒーター14、スクリーン15およびブレーカープレ
ート16を備えた押出機１と、ダイリング21およびコア22
を備えた金型２とで構成されている。A shown in FIG. 3 is an extrusion molding apparatus for molding an extruded product having an annular portion, and includes an extruder 1 including a hopper 11, a screw 12, a barrel 13, a heater 14, a screen 15 and a breaker plate 16, Die ring 21 and core 22
And a mold 2 provided with.
押出機１は、ホッパー11からバレル13の内部に供給され
た合成樹脂をスクリュー12で輸送および加圧すると共
に、ヒーター14でバレル13を加熱しながら混練し、スク
リーン15およびブレーカープレート16を通して異物排除
した後に金型２の樹脂導入部ａに導入するものである。The extruder 1 transports and pressurizes the synthetic resin supplied from the hopper 11 into the barrel 13 with the screw 12, kneads the barrel 13 with the heater 14 while heating, and removes foreign matter through the screen 15 and the breaker plate 16. It is later introduced into the resin introduction part a of the mold 2.
金型２は、前記バレル13の先端部に取り付けられ、押出
機１から導入される混練された合成樹脂を所望の形状に
整流賦形するものである。The mold 2 is attached to the tip of the barrel 13 and straightens and shapes the kneaded synthetic resin introduced from the extruder 1 into a desired shape.
前記金型２は、樹脂導入部ａを有するダイリング21と、
該ダイリング21にブリッジ22を介して連結されているコ
ア23とを備えており、ダイリング21の最終平行部211と
コア23との間には、最終的に合成樹脂を所望の環形状に
整流賦形するスリット部ｂが樹脂導入部ａと連通して設
けられている。The mold 2 includes a die ring 21 having a resin introducing portion a,
The die ring 21 is provided with a core 23 connected to the die ring 21 via a bridge 22, and a synthetic resin is finally formed into a desired ring shape between the final parallel portion 211 of the die ring 21 and the core 23. A slit portion b for straightening and shaping is provided in communication with the resin introducing portion a.
また、前記ダイリング21の最終平行部211より奥の内周
面は、樹脂導入部ａの径が金型２の出口側端部に向かっ
て段階的に小さくなるように、テーパーが設けられてお
り、樹脂導入部ａを通過する合成樹脂が段階的に整流さ
れながらスリット部ｂに流動するようになっている。Further, the inner peripheral surface of the die ring 21 farther from the final parallel portion 211 is provided with a taper so that the diameter of the resin introducing portion a gradually decreases toward the outlet side end portion of the mold 2. The synthetic resin passing through the resin introducing portion a flows into the slit portion b while being rectified stepwise.
ブリッジ22は、スリット部ｂのうち、樹脂導入部ａとの
連通口である入口近傍に設けられている。The bridge 22 is provided in the slit part b near the inlet which is a communication port with the resin introducing part a.
更に、コア23は、第２図に示すように、スリット部ｂの
幅t1,t2,t3,t4全部が均一になるように、最終平行部211
内の中央位置に設けられている。Further, as shown in FIG. 2, the core 23 has a final parallel portion 211 so that all the widths t 1 , t 2 , t 3 , t 4 of the slit portion b are uniform.
It is provided in the central position.
本実施例の金型２は、このように、ブリッジ22がスリッ
ト部ｂの入口近傍に配設されているために、コア23のブ
リッジ22から出口側端部までの長さｌを、最終平行部の
長さｌ′より短くすることができ、コア23のたわみ強度
を強化することかできる。即ち、スリット部ｂを流動す
る樹脂の内圧力分布の微小な差異等によるコア23のたわ
みを防止することができ、スリット部ｂの幅を終始均一
に維持することができる。In the mold 2 of this embodiment, since the bridge 22 is arranged near the entrance of the slit portion b as described above, the length 1 from the bridge 22 of the core 23 to the end on the exit side is finally parallel. It can be made shorter than the length l'of the part, and the flexural strength of the core 23 can be enhanced. That is, it is possible to prevent the core 23 from bending due to a slight difference in the internal pressure distribution of the resin flowing in the slit portion b, and to keep the width of the slit portion b uniform throughout.
次に、合成樹脂組成物はその組成比（重量比）が、例え
ば塩化ビニル樹脂100に対して、Sn系安定剤0.6,滑剤1.
5,酸化マグネシウム等の補助安定剤1.5,ポリメチルメタ
アクリレート（PMMA）等の加工助剤1.0,充填剤5.0,着色
剤1.0を混入したものを使用する。なお、ここで加工助
剤として用いるPMMAは、加熱による合成樹脂の分解を阻
止するもので、この加工助剤を混入することにより、合
成樹脂の加熱温度を通常より高くして成形することがで
きるものである。Next, the composition ratio (weight ratio) of the synthetic resin composition is, for example, 100 vinyl chloride resin, Sn stabilizer 0.6, lubricant 1.
5, A mixture of a co-stabilizer 1.5 such as magnesium oxide, a processing aid 1.0 such as polymethylmethacrylate (PMMA), a filler 5.0, and a colorant 1.0 is used. The PMMA used as a processing aid here prevents decomposition of the synthetic resin by heating, and by mixing this processing aid, the heating temperature of the synthetic resin can be made higher than usual for molding. It is a thing.
本発明実施例の金型２と、従来の金型について、それら
金型によって成形された押出品の外観および品質を比較
したところ、下記の表１に示す結果が得られた。なお、
本実施例の金型２では、上述したような加工助剤が混入
された合成樹脂組成物を用いて高温成形を行い、従来の
金型では、従来行われていた方法と同様に、加工助剤が
混入されていない合成樹脂組成物を用いて、その合成樹
脂の適温で成形した。When the appearance and quality of the extruded product molded by the mold 2 of the example of the present invention and the conventional mold were compared, the results shown in Table 1 below were obtained. In addition,
In the mold 2 of this example, high temperature molding was performed using the synthetic resin composition in which the processing aid as described above was mixed, and in the conventional mold, the processing aid was processed in the same manner as the conventional method. A synthetic resin composition containing no agent was molded at an appropriate temperature of the synthetic resin.
本実施例の金型２にあっては、合成樹脂が樹脂導入部ａ
において従来より高温であるので、低粘度状態でブリッ
ジ22を通過していることになる。従って、この金型２に
よって成形された押出品は、ブリッジ22を通過した痕跡
が残らずに高い光沢度が得られ、外観的に優れているこ
とが明らかである。 In the mold 2 of this embodiment, the synthetic resin is the resin introduction part a.
Since the temperature is higher than that in the conventional case, it means that it is passing through the bridge 22 in a low viscosity state. Therefore, it is clear that the extruded product molded by the mold 2 has a high glossiness without leaving a trace of passing through the bridge 22 and is excellent in appearance.
これに加えて、コア23のたわみ強度が高く、スリット部
ｂの幅が均一に維持されていることから、偏肉度（最大
肉厚−最小肉厚）の極めて小さい環状部を有する押出品
が成形できることもわかる。更に、この押出成形装置Ａ
によって形成された押出品は、後に適宜の長さに切断さ
れるが、環状部の偏肉度が小さいことにより、その切断
時においてははさみ割れもなく品質の高いものが得られ
た。In addition, since the bending strength of the core 23 is high and the width of the slit b is maintained uniform, an extruded product having an annular portion with an extremely small thickness deviation (maximum wall thickness-minimum wall thickness) is obtained. You can see that it can be molded. Furthermore, this extrusion molding apparatus A
The extruded product formed by the above method was cut into an appropriate length later, but due to the small uneven thickness of the annular portion, a high quality product was obtained without scissors cracking at the time of cutting.
ちなみに、本実施例の押出成形装置Ａで、従来用いられ
ていたのと同様の加工助剤の混入されていない合成樹脂
組成物を用い、その合成樹脂の適温で成形した場合の結
果を、比較例として上記の表１に追加して記載してい
る。By the way, in the extrusion molding apparatus A of the present embodiment, the same results as in the case of molding at a suitable temperature of the synthetic resin using a synthetic resin composition containing no processing aid similar to that used conventionally is compared. As an example, it is additionally described in Table 1 above.
この方法で成形された押出品は、偏肉度は極めて小さい
ものの、合成樹脂がブリッジ22を通過した痕跡が押出品
の表面に表れるため、この痕跡が光沢をなくして外観を
損ねていると共に、切断時にはさみ割れし易いといった
ような物性への悪影響もあることがわかった。The extrudate molded by this method has an extremely small thickness deviation, but since a trace of synthetic resin passing through the bridge 22 appears on the surface of the extrudate, this trace loses gloss and impairs the appearance. It was also found that there is an adverse effect on the physical properties such that scissors tend to crack during cutting.
即ち、本発明の押出成形金型２を用いて押出成形するに
あたっては、PMMA等の加工助剤が混入されている合成樹
脂を用いて高温成形するのがよい。That is, when extrusion molding is performed using the extrusion molding die 2 of the present invention, it is preferable to perform high temperature molding using a synthetic resin mixed with a processing aid such as PMMA.
その適用分野としては、枠部材、パイプ、軒樋を成形す
る押出成形装置等が考えられるが、前記コア23を複数組
み込むことによって、第４図に示すような環状部r1,r2,
r3,r4,r5を複数有する軒樋Ｂの押出成形に適用すること
もできる。The field of application thereof may be a frame member, a pipe, an extrusion molding device for molding eaves gutters, etc. By incorporating a plurality of the cores 23, the annular parts r 1 , r 2 ,
It can also be applied to extrusion molding of eaves gutter B having a plurality of r 3 , r 4 and r 5 .
以上、本発明の実施例を図面により詳述してきたが、具
体的な構成は上記実施例に限定されるものではなく、本
発明の要旨を逸脱しない範囲の設計変更等があっても本
発明に含まれる。The embodiments of the present invention have been described in detail above with reference to the drawings. However, the specific configuration is not limited to the above embodiments, and the present invention can be made even if there is a design change or the like within the scope not departing from the gist of the present invention. include.
例えば、上記実施例では、塩化ビニル樹脂を主体とした
樹脂材料を用いたが、ポリエチレン等の他の合成樹脂を
主体とした樹脂材料を用いてもよい。また、押出機の構
成も実施例に限られない。For example, in the above embodiment, the resin material mainly composed of vinyl chloride resin is used, but the resin material mainly composed of other synthetic resin such as polyethylene may be used. Further, the configuration of the extruder is not limited to the example.
（発明の効果） 以上のとおり、本発明の押出成形金型では、ブリッジが
スリット部の入口近傍に配設されているので、ブリッジ
から出口側端部までのコアの長さを、最終平行部の長さ
より短くすることができ、コアのたわみ強度を強化する
ことができる。即ち、スリット部を流動する樹脂の内圧
力分布の微小な差異等によるコアのたわみを防止するこ
とができ、スリット部の幅を均一に維持することができ
る。(Effect of the invention) As described above, in the extrusion molding die of the present invention, since the bridge is arranged near the entrance of the slit portion, the length of the core from the bridge to the end on the exit side is determined by the final parallel portion. The length of the core can be made shorter, and the flexural strength of the core can be enhanced. That is, it is possible to prevent the core from bending due to a minute difference in the internal pressure distribution of the resin flowing in the slit portion, and it is possible to maintain the width of the slit portion uniform.
しかも、合成樹脂の加熱分解を阻止する加工助剤を含む
配合樹脂を使用することにより、合成樹脂の加熱温度を
通常より高くでき、このため、軟化溶融された合成樹脂
の流動状態が向上することになり、ブリッジを通過した
痕跡が押出品の表面に残らず、高い光沢度を有する外観
的に優れた押出品を得ることができる。Moreover, by using a compounded resin containing a processing aid that prevents thermal decomposition of the synthetic resin, the heating temperature of the synthetic resin can be made higher than usual, and therefore, the flow state of the softened and melted synthetic resin is improved. Therefore, no trace of passing through the bridge remains on the surface of the extruded product, and an extruded product having a high glossiness and excellent in appearance can be obtained.
特に、コアの断面積が小さい場合でも、偏肉度の極めて
小さい複数の環状部を有する軒樋等の押出品を得ること
ができる。In particular, even when the core has a small cross-sectional area, it is possible to obtain an extruded product such as an eaves gutter having a plurality of annular portions with extremely small thickness deviation.
第１図は本発明実施例の押出成形金型の出口部分を示す
断面図、第２図は実施例金型の出口部分を示す斜視図、
第３図は本実施例の押出成形金型を取り付けた押出成形
装置の要部を示す縦断面図、第４図は押出成形品を示す
斜視図、第５図は従来の押出成形金型の出口部分を示す
断面図である。 2:金型 21:ダイリング 211:最終平行部 22:ブリッジ 23:コア b:スリット部FIG. 1 is a sectional view showing an outlet portion of an extrusion molding die of an embodiment of the present invention, and FIG. 2 is a perspective view showing an outlet portion of an embodiment die,
FIG. 3 is a vertical cross-sectional view showing a main part of an extrusion molding apparatus equipped with the extrusion molding die of this embodiment, FIG. 4 is a perspective view showing an extrusion molded article, and FIG. 5 is a conventional extrusion molding die. It is sectional drawing which shows an exit part. 2: Mold 21: Die ring 211: Final parallel part 22: Bridge 23: Core b: Slit part
Claims (1)
含む配合樹脂を使用して、環状部を有する押出品を成形
する押出成形金型であって、ダイリングと、該ダイリン
グにブリッジを介して連結されているコアとを備え、ダ
イリングの最終平行部とコアとの間に、樹脂を所望の環
形状に整流賦形するスリット部が形成され、該スリット
部の入口近傍に前記ブリッジが配設されていることを特
徴とする押出成形金型。1. An extrusion molding die for molding an extruded product having an annular portion by using a compounding resin containing a processing aid for preventing thermal decomposition of a synthetic resin, the die ring and the die ring. With a core connected through a bridge, between the final parallel portion of the die ring and the core, a slit portion for rectifying and shaping the resin into a desired ring shape is formed, and near the entrance of the slit portion. An extrusion molding die, wherein the bridge is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62294388A JPH07115401B2 (en) | 1987-11-21 | 1987-11-21 | Extrusion mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62294388A JPH07115401B2 (en) | 1987-11-21 | 1987-11-21 | Extrusion mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135621A JPH01135621A (en) | 1989-05-29 |
| JPH07115401B2 true JPH07115401B2 (en) | 1995-12-13 |
Family
ID=17807083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62294388A Expired - Fee Related JPH07115401B2 (en) | 1987-11-21 | 1987-11-21 | Extrusion mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07115401B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100611734B1 (en) * | 2004-10-04 | 2006-08-11 | 한상욱 | A plastic mold |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3216918C2 (en) * | 1982-05-06 | 1984-06-14 | Dynamit Nobel Ag, 5210 Troisdorf | Tool for extruder |
-
1987
- 1987-11-21 JP JP62294388A patent/JPH07115401B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01135621A (en) | 1989-05-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |