JPH02292017A - Die for blow molding machine - Google Patents
Die for blow molding machineInfo
- Publication number
- JPH02292017A JPH02292017A JP1112676A JP11267689A JPH02292017A JP H02292017 A JPH02292017 A JP H02292017A JP 1112676 A JP1112676 A JP 1112676A JP 11267689 A JP11267689 A JP 11267689A JP H02292017 A JPH02292017 A JP H02292017A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- flow path
- groove
- conduit
- resin flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000071 blow moulding Methods 0.000 title claims description 8
- 239000011347 resin Substances 0.000 claims abstract description 132
- 229920005989 resin Polymers 0.000 claims abstract description 132
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は押出機からの溶融樹脂を金型内へ筒状に押出し
てその内部にエアを圧入し中空品を成形するブロー成形
機において、押出機と金型との間に設けられる樹脂押出
用のダイスに関するものである．
〔従来の技術〕
この種ブロー成形機のダイスは従来、筒状のダイスハウ
ジングとその内周に嵌合する芯金とを備えており、ダイ
スハウジングと芯金との間には、押出機に接続された芯
金上端の用脂入口と、金型に接続された芯金下端の筒状
ノズルとを連通させる筒状の樹脂流路が形成されている
。また、芯金下端の中心部には、エア源に接続されたブ
ロー孔が開口されている．そして、押出機から押出され
てダイスの樹脂入口へ供給された溶融樹脂は、筒状の樹
脂流路を経てノズルから金型内に押出され、このとき芯
金中心のブロー孔からエアが噴出してこのエアが押出樹
脂内に圧入されるので、中空の成形品が得られる．
〔発明が解決しようとする課題〕
しかしながら、このような従来のブロー成形機において
は、ダイスの樹脂入口孔から供給された溶融樹脂が円筒
状の樹脂流路へ均一に分配されにくく、製品の肉厚が不
均一になって品質が低下することがある。また、樹脂入
口から樹脂流路へ分配された樹脂の一部が動かずに滞留
することにより劣化することがある．そこでこのような
欠点を除去するため例えば特公昭５Ｂ−２２３４１号公
報に開示されているように、樹脂流路の形状に工夫がな
されたものが提案されているが、必ずしも満足した効果
を期待することができない．〔課題を解決するための手
段〕
このような課題を解決するために本発明では、筒状ダイ
スハウジングの内周に環状の樹脂流路を介して嵌合され
た芯金の上端部に、前記内周と嵌合する樹脂分配部を設
けてこの樹脂分配部に樹脂入口と連通ずる樹脂通路を直
径方向に貫通し、この樹脂通路の両端開口部に前記樹脂
流路へ向うにしたがって次第に円周方向に幅広となる溝
を樹脂分配部の周面に沿って形成するとともに、この溝
と前記樹脂流路との連通部に、この樹脂流路の一部を遮
断する凸条を、前記樹脂通路の開口部の下側に円周方向
に延設した。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a blow molding machine that extrudes molten resin from an extruder into a mold into a cylinder shape and pressurizes air into the mold to form a hollow product. This relates to a die for resin extrusion that is installed between the extruder and the mold. [Prior Art] The die of this type of blow molding machine has conventionally been equipped with a cylindrical die housing and a core metal that fits into the inner periphery of the die housing. A cylindrical resin flow path is formed that communicates the oil inlet at the upper end of the connected core metal with the cylindrical nozzle at the lower end of the core metal connected to the mold. In addition, a blow hole connected to an air source is opened in the center of the lower end of the core metal. The molten resin extruded from the extruder and supplied to the resin inlet of the die passes through the cylindrical resin flow path and is extruded from the nozzle into the mold. At this time, air is blown out from the blow hole in the center of the core metal. Since the lever air is press-fitted into the extruded resin, a hollow molded product is obtained. [Problems to be Solved by the Invention] However, in such conventional blow molding machines, it is difficult for the molten resin supplied from the resin inlet hole of the die to be uniformly distributed into the cylindrical resin flow path, and the thickness of the product is The thickness may become uneven and the quality may deteriorate. Additionally, some of the resin distributed from the resin inlet to the resin flow path may remain stationary and deteriorate, resulting in deterioration. In order to eliminate such drawbacks, for example, as disclosed in Japanese Patent Publication No. 5B-22341, it has been proposed that the shape of the resin flow path is modified, but it is not always expected that a satisfactory effect will be achieved. I can't. [Means for Solving the Problems] In order to solve such problems, in the present invention, the above-mentioned metal core is fitted to the upper end portion of the core metal fitted to the inner periphery of the cylindrical die housing via the annular resin channel. A resin distribution part that fits into the inner circumference is provided, and a resin passage communicating with the resin inlet is passed through the resin distribution part in the diametrical direction, and a circumferential groove is formed at both end openings of the resin passage gradually toward the resin flow passage. A groove that is wide in the direction is formed along the circumferential surface of the resin distribution section, and a protrusion that blocks a part of the resin flow path is provided at a communication portion between the groove and the resin flow path. It extends in the circumferential direction below the opening.
（作 用〕
押出機から押出された溶融樹脂は、ダイスの樹脂入口か
ら樹脂分配部の樹脂通路に入って両側に別れ、両側の各
開口から出て溝内を樹脂流路へ向ったのち、環状の樹脂
流路内をノズルへ向い、ノズルから金型内へ押出される
．この場合、樹脂分配部においては、樹脂通路の開口か
ら出た溶融樹脂が、樹脂流路へ向うにしたがって幅広に
なる溝に沿って流れ、凸条を避けて両側へ別れるので、
樹脂流路全体へ均一に分配される。(Function) The molten resin extruded from the extruder enters the resin passage of the resin distribution part from the resin inlet of the die, separates into both sides, exits from each opening on both sides, and heads into the resin flow path in the groove. The inside of the annular resin flow path is directed toward the nozzle, and is extruded from the nozzle into the mold.In this case, in the resin distribution section, the molten resin that comes out of the opening of the resin path becomes wider as it goes toward the resin flow path. The water flows along the grooves and separates to both sides, avoiding the protrusions.
Evenly distributed throughout the resin flow path.
第１図ないし第４図は本発明に係るブロー成形機のダイ
スの実施例を示し、第１図はその側面図、第２図は左半
部を第１図のＡ−Ａ線で破断して示し右半部を第１図の
Ｂ−Ｂ線で破断して示す図、第３図は左半部を第２図の
矢印Ｃ方向から仰視して示し右半部を第２図のＤ−Ｄ線
で破断して示す図、第４図は第２図のＥ−Ｅ断面図であ
る。図において、ダイスｌは、外周面２ａの形状を矩形
状に形成され内周面２ｂの形状を小判形に形成されたダ
イスハウジング２を備えており、その上端と下端とには
、枠状に形成されたシリンダブラケット３と環状に形成
された底部リング４とがそれぞれボルト止めされている
。シリンダブラケット３の上ｕｉ３ａには、パリソン制
御シリンダ５が固定されており、そのピストンロッド６
の作用端ねじ部にはカップリング７のねし孔が螺合され
ている。1 to 4 show an embodiment of the die of the blow molding machine according to the present invention, FIG. 1 is a side view thereof, and FIG. 2 is a left half cut away along line A-A in FIG. 1. Figure 3 shows the left half viewed upward from the direction of arrow C in Figure 2, and the right half is shown along line D in Figure 2. FIG. 4 is a cross-sectional view taken along the line E--E in FIG. 2. In the figure, the die l is equipped with a die housing 2 having an outer circumferential surface 2a formed in a rectangular shape and an inner circumferential surface 2b formed in an oval shape. A formed cylinder bracket 3 and an annularly formed bottom ring 4 are each bolted together. A parison control cylinder 5 is fixed to the upper ui3a of the cylinder bracket 3, and its piston rod 6 is fixed to the upper ui3a of the cylinder bracket 3.
A threaded hole of the coupling 7 is screwed into the working end threaded portion of the coupling 7.
一方、ダイスハウジング２の内周面２ｂには、断面形状
を小判形に形成された芯金８が嵌合されており、そのは
〜′下半部および底部リング４と、ダイスハウジング２
の内周面２ｂとの間には、断面波形に形成された長円環
状の樹脂流路９が設けられている．また、芯金８のはり
上半部である樹脂分配部８ａとダイスハウジング２の内
周面２ｂとの間には、樹脂流路９が設けられておらず、
樹脂分配部８ａと内周面２ｂとはしっくり嵌合されてい
る．そして、樹脂分配部８ａには、図示しない押出機の
樹脂押出口に連結された樹脂入口１０が周面から軸芯部
に向って穿設されており、また、この樹脂入口１０の下
方には、これと軸芯部において連通ずる樹脂通路１１が
、樹脂分配部８ａの短手方向の直径方向に貫通されて両
端を樹脂分配部８ａの周面に開口されている。樹脂通路
１ｌの両端開口部には、前記樹脂流路９とその上端にお
いて連通する一対の溝１２が樹脂分配部８ａの周面に沿
って設けられており、この満１２は、樹脂通路ｌ１と連
通し樹脂流路９へ向うにしたがって幅広となるように正
面視を山形状に形成されている。さらにこの溝１２と樹
脂流路９との連通部には、樹脂流路９の短手方向すなわ
ち樹脂通路ｌ１の長手方向の互いに近接している両壁面
間の一部を完全にまたははり遮断する幅を有し、かつ、
樹脂流路９の長手方向すなわち樹脂通路１１の長手方向
と直交な方向に適宜な長さを有する薄板水平板状の凸条
ｌ３が、樹脂通路１１の開口部の下側に対応して円周方
向に延設されており、樹脂通路１ｌから出て溝１２内を
流れる樹脂を凸条ｌ３により凸条１３の水平長さ方向の
両側へ分配し得るように構成されている．なお、この凸
条ｌ３の長さは、樹脂流路９の水平方向や垂直方向の形
状寸法や、樹脂の種類等によっても異なるが、断面が長
円環状の樹脂流路９の長手方向の長さの例えば１／５〜
１／３程度、好ましくは１／４程度にしておく。On the other hand, a core bar 8 having an oval cross section is fitted into the inner circumferential surface 2b of the die housing 2, and the core bar 8 has a lower half and a bottom ring 4, and the die housing 2.
An elongated annular resin flow path 9 having a corrugated cross section is provided between the inner peripheral surface 2b and the inner circumferential surface 2b. Furthermore, no resin flow path 9 is provided between the resin distribution portion 8a, which is the upper half of the beam of the core bar 8, and the inner peripheral surface 2b of the die housing 2.
The resin distribution portion 8a and the inner circumferential surface 2b are fitted snugly. In the resin distribution section 8a, a resin inlet 10 connected to a resin extrusion port of an extruder (not shown) is bored from the circumferential surface toward the shaft core. A resin passage 11 communicating with this at the axial core portion passes through the resin distribution portion 8a in the diametrical direction of the transverse direction, and has both ends opened to the circumferential surface of the resin distribution portion 8a. At both end openings of the resin passage 1l, a pair of grooves 12 are provided along the circumferential surface of the resin distribution section 8a, communicating with the resin passage 9 at its upper end. It is formed into a mountain shape when viewed from the front so that the width becomes wider as it goes toward the communicating resin flow path 9. Further, in the communication portion between the groove 12 and the resin flow path 9, a portion between both wall surfaces that are close to each other in the short direction of the resin flow path 9, that is, the longitudinal direction of the resin path l1, is completely or partially blocked. has a width, and
A thin horizontal plate-shaped convex strip l3 having an appropriate length in the longitudinal direction of the resin flow path 9, that is, in a direction perpendicular to the longitudinal direction of the resin passage 11, extends around the circumference corresponding to the lower side of the opening of the resin passage 11. It is configured such that the resin flowing from the resin passage 1l and flowing inside the groove 12 can be distributed to both sides of the protrusion 13 in the horizontal length direction by the protrusion l3. Note that the length of the protruding strip l3 varies depending on the horizontal and vertical dimensions of the resin flow path 9, the type of resin, etc. For example, 1/5~
Leave it at about 1/3, preferably about 1/4.
前記カップリング７には、複数個（本実施例では４個）
のロッドｌ４が上端を固定され芯金８の長手方向に並列
して垂下されており、これらのロッド１４は、芯金８に
設けたロンド孔に摺動自在に嵌合されている．１５は上
端部の径を芯金８の径とはゾ同径の断面小判形に形成さ
れたマンドレルであって、そのねじ孔には前記ロッド１
４のねじ部が螺合されており、このマンドレルｌ５の外
周面と、底部リング４に固定されたグイリップ１６の内
周面との間には、前記樹脂流路９と連通ずる断面波形台
形筒状の樹脂流路ｌ７が形成されている．樹脂流路１７
の下端には、樹脂が押出されるすき間としてのノズルｌ
８が形成されており、ｌ９はノズルｌ８から押出される
樹脂で形成された筒状のバリソンである．そして前記パ
リソン制１ｎシリンダ５のピストンロッド６を進退させ
、ロッドｌ４を介してマンドレル１５を進退させると、
ノズルｌ８を形成するすき間の大きさが調節されてバリ
ソンｌ９の肉厚が調節されるように構成されている．グ
イリップ１６には図示しない金型が、交換可能なライナ
２０を介して接合されている。The coupling 7 includes a plurality of (four in this embodiment)
Rods l4 are fixed at their upper ends and are suspended in parallel in the longitudinal direction of the core metal 8, and these rods 14 are slidably fitted into rond holes provided in the core metal 8. Reference numeral 15 denotes a mandrel having an oval cross-section whose upper end has the same diameter as the core bar 8, and the rod 1 is inserted into the threaded hole of the mandrel.
4 is screwed together, and between the outer circumferential surface of this mandrel l5 and the inner circumferential surface of a guilip 16 fixed to the bottom ring 4, there is a trapezoidal cylinder with a corrugated cross section that communicates with the resin flow path 9. A shaped resin flow path l7 is formed. Resin channel 17
At the bottom end of the nozzle l is used as a gap where the resin is extruded.
8 is formed, and l9 is a cylindrical balisong made of resin extruded from nozzle l8. Then, when the piston rod 6 of the parison system 1n cylinder 5 is advanced and retreated, and the mandrel 15 is advanced and retreated via the rod l4,
The structure is such that the thickness of the balisong l9 is adjusted by adjusting the size of the gap forming the nozzle l8. A mold (not shown) is joined to the grip lip 16 via a replaceable liner 20.
芯金８の孔には、図示しないエア源に接続されたエアバ
イブ２ｌが摺動自在に挿入されており、このエアパイプ
２１の下端は、マンドレル！５に設けたエア通路２２に
接続されて固定されている．そして、マンドレル１５の
軸心部を下方へ向うエア通路２２下端のブロー孔２３は
、金型内に開口されており、金型内へ押出されたパリソ
ンｌ９の内部へ圧入されるように構成されている。An air vibrator 2l connected to an air source (not shown) is slidably inserted into the hole of the core bar 8, and the lower end of the air pipe 21 is connected to the mandrel! It is connected to and fixed to the air passage 22 provided in 5. A blow hole 23 at the lower end of the air passage 22 extending downward from the axial center of the mandrel 15 is opened in the mold and configured to be press-fitted into the parison l9 extruded into the mold. ing.
第１図に符号２４で示すものは、ダイス１の両側に架設
されたブラケット部分であって、ダイスｌ全体はシリン
ダブラケット３の基板をクランプ２５で扶持することに
よりブラケット部分２４に支持されている．
以上のように構成されたダイスの動作を説明する．押出
機から押出されてダイスｌの樹脂入口ｌ０に供給された
溶融樹脂は、芯金８の樹脂分配部８ａ中心において樹脂
通路１１の中央部に移動し、両側に分配されて樹脂分配
部８ａ周面の開口から溝１２内に吐出される。吐出され
た溶融樹脂は、溝１２内を樹脂流路９に向って流れるが
、そこには樹脂流路９をは一′遮断する凸条ｌ３が樹脂
流路９の円周方向に延設されており、かつ、樹脂流路９
方向へ向うにしたがって樹脂流路９の長円環状断面の長
手方向両側に広がっている溝１２が設けられているので
、溶融樹脂は凸条ｌ３の両側に均一に分配されて溝１２
内八万偏な《広がったのち、樹脂流路９の各部へ均一に
分配される．樹脂流路９内を流下する溶融樹脂は、樹脂
流路９が断面波形状に形成されていることにより通過抵
抗が付与されるので、さらに均一に分配されながら樹脂
流路ｌ７に向い、ノズルｌ８からバリソン１９となって
金型内へ押出される．このときブロー孔２３からエアが
噴出していてパリソン１９内へ圧入されるので、中空状
の成・形品が得られる．パリソン１９の厚みを調節する
場合には、パリソン制御シリンダ５のピストンロソド６
を進退させると、カップリング７とロッドｌ４とを介し
てマンドレルｌ５が進退するので、ノズルｌ８の断面積
が拡縮され、パリソンｌ９の厚みが調節される。What is indicated by reference numeral 24 in FIG. 1 is a bracket part installed on both sides of the die 1, and the whole die 1 is supported by the bracket part 24 by supporting the base plate of the cylinder bracket 3 with a clamp 25. ．． The operation of the dice configured as above will be explained. The molten resin extruded from the extruder and supplied to the resin inlet 10 of the die 1 moves to the center of the resin passage 11 at the center of the resin distribution part 8a of the core bar 8, is distributed to both sides, and is distributed around the resin distribution part 8a. It is discharged into the groove 12 from the opening in the surface. The discharged molten resin flows in the groove 12 toward the resin flow path 9, but there is a protrusion l3 extending in the circumferential direction of the resin flow path 9 to partially block the resin flow path 9. and the resin flow path 9
Since grooves 12 are provided that widen on both sides in the longitudinal direction of the elongated annular cross section of the resin flow path 9 as they move toward the direction, the molten resin is uniformly distributed on both sides of the protruding strip l3.
After spreading, it is evenly distributed to each part of the resin flow path 9. The molten resin flowing down inside the resin flow path 9 is provided with passage resistance due to the resin flow path 9 being formed in a wave-shaped cross section, so that the molten resin flows toward the resin flow path l7 while being distributed evenly, and flows through the nozzle l8. From there, it becomes a balisong 19 and is extruded into a mold. At this time, air is blown out from the blow hole 23 and is press-fitted into the parison 19, so that a hollow molded product is obtained. When adjusting the thickness of the parison 19, the piston rod 6 of the parison control cylinder 5
When the mandrel l5 is moved back and forth, the mandrel l5 is moved back and forth via the coupling 7 and the rod l4, so that the cross-sectional area of the nozzle l8 is expanded or contracted, and the thickness of the parison l9 is adjusted.
なお、本実施例では芯金８やバリソン１９等の断面形状
を小判形に形成した例を示したが、長方形や真円形など
、いかなる断面形状でもよく、同様の作用効果が得られ
る．
〔発明の効果）
以上の説明により明らかなように本発明によればブロー
成形機のダイスにおいて、筒状ダイスハウジングの内周
に環状の樹脂流路を介して嵌合された芯金の上端部に、
前記内周と嵌合する樹脂分配部を設けてこの樹脂分配部
に樹脂入口と連通ずる樹脂通路を直径方向に貫通し、こ
の樹脂通路の両端開口部に前記樹脂流路へ向うにしたが
って次第に円周方向に幅広となる溝を樹脂分配部の周面
に沿って形成するとともに、この溝と前記樹脂流路との
連通部に、この樹脂流路の一部を遮断する凸条を、前記
樹脂通路の開口部の下側に円周方向に延設したことによ
り、押出機から押出されてダイスの樹脂入口へ供給され
た溶融樹脂は、樹脂通路の中央部から両側に分かれて周
面の開口から溝内に吐出され、溝内を樹脂流路に向って
流れるが、この溶融樹脂は凸条の両側に均一に分配され
て溝内へ万偏なく広がったのち、樹脂流路の各部へ均一
に分配されるので、ノズルから押出されるパリソンの厚
みが均一になり、成形品の品質が大幅に向上する．Although this embodiment shows an example in which the cross-sectional shape of the core metal 8, balisong 19, etc. is formed into an oval shape, any cross-sectional shape such as a rectangle or a perfect circle may be used to obtain the same effect. [Effects of the Invention] As is clear from the above description, according to the present invention, in the die of a blow molding machine, the upper end portion of the core metal is fitted to the inner circumference of the cylindrical die housing via the annular resin channel. To,
A resin distribution portion that fits into the inner periphery is provided, and a resin passage that communicates with the resin inlet passes through the resin distribution portion in the diametrical direction, and a resin passageway is provided with openings at both ends of the resin passageway that gradually become circular toward the resin flow path. A groove that is wide in the circumferential direction is formed along the circumferential surface of the resin distribution section, and a protrusion that blocks a part of the resin flow path is provided at a communication portion between the groove and the resin flow path. By extending the circumferential direction below the opening of the passage, the molten resin extruded from the extruder and supplied to the resin inlet of the die is separated from the center of the resin passage to both sides and passes through the opening on the circumference. The molten resin is discharged into the groove and flows inside the groove towards the resin flow path, but this molten resin is evenly distributed on both sides of the convex stripes, spreads evenly into the groove, and then flows uniformly to each part of the resin flow path. As the parison is distributed evenly, the thickness of the parison extruded from the nozzle becomes uniform, greatly improving the quality of the molded product.
第１図ないし第４図は本発明に係るブロー成形機のダイ
スの実施例を示し、第１図はその側面図、第２図は左半
部を第１図のＡ−Ａ線で破断して示し右半部を第１図の
Ｂ−Ｂ線で破断して示す図、第３図は左半部を第２図の
矢印Ｃ方向から仰視して示し右半部を第２図のＤ−Ｄ線
で破断して示す図、第４図は第２図のＥ−Ｅ断面図であ
る．１・・・・ダイス、２・・・・ダイスハウジング、
２ｂ・・・・内周円、８・・・・芯金、８ａ・・・・樹
脂分配部、９・・・・樹脂流路、１０・・・・樹脂入口
、１１・・・・樹脂通路、ｌ２・・・・溝、ｌ３・・・
・凸条。1 to 4 show an embodiment of the die of the blow molding machine according to the present invention, FIG. 1 is a side view thereof, and FIG. 2 is a left half cut away along line A-A in FIG. 1. Figure 3 shows the left half viewed upward from the direction of arrow C in Figure 2, and the right half is shown along line D in Figure 2. 4 is a sectional view taken along the line E-E in FIG. 2. 1... Dice, 2... Dice housing,
2b: Inner circumference circle, 8: Core bar, 8a: Resin distribution section, 9: Resin flow path, 10: Resin inlet, 11: Resin passage , l2...groove, l3...
・Protrusions.
Claims (1)
嵌合された芯金の上端部に、前記内周と嵌合する樹脂分
配部を設けてこの樹脂分配部に樹脂入口と連通する樹脂
通路を直径方向に貫通し、この樹脂通路の両端開口部に
前記樹脂流路へ向うにしたがって次第に円周方向に幅広
となる溝を樹脂分配部の周面に沿って形成するとともに
、この溝と前記樹脂流路との連通部に、この樹脂流路の
一部を遮断する凸条を、前記樹脂通路の開口部の下側に
円周方向に延設したことを特徴とするブロー成形機のダ
イス。A resin distribution portion that fits into the inner periphery is provided at the upper end of the core metal fitted to the inner periphery of the cylindrical die housing via an annular resin flow path, and this resin distribution portion communicates with the resin inlet. A groove that penetrates the resin passage in the diametrical direction and gradually becomes wider in the circumferential direction toward the resin flow passage is formed at both end openings of the resin passage along the circumferential surface of the resin distribution section. A blow molding machine characterized in that a protruding strip for blocking a part of the resin flow path is provided in a communication portion between the resin flow path and the resin flow path, and extending in the circumferential direction below the opening of the resin flow path. dice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112676A JP2582292B2 (en) | 1989-05-01 | 1989-05-01 | Blow molding machine dies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1112676A JP2582292B2 (en) | 1989-05-01 | 1989-05-01 | Blow molding machine dies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02292017A true JPH02292017A (en) | 1990-12-03 |
| JP2582292B2 JP2582292B2 (en) | 1997-02-19 |
Family
ID=14592689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1112676A Expired - Lifetime JP2582292B2 (en) | 1989-05-01 | 1989-05-01 | Blow molding machine dies |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582292B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020997A1 (en) * | 1992-04-20 | 1993-10-28 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Flat blow molding apparatus, flat blow molding method and product of flat blow molding |
-
1989
- 1989-05-01 JP JP1112676A patent/JP2582292B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020997A1 (en) * | 1992-04-20 | 1993-10-28 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Flat blow molding apparatus, flat blow molding method and product of flat blow molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2582292B2 (en) | 1997-02-19 |
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