JPS6257493B2 - - Google Patents
Info
- Publication number
- JPS6257493B2 JPS6257493B2 JP55024016A JP2401680A JPS6257493B2 JP S6257493 B2 JPS6257493 B2 JP S6257493B2 JP 55024016 A JP55024016 A JP 55024016A JP 2401680 A JP2401680 A JP 2401680A JP S6257493 B2 JPS6257493 B2 JP S6257493B2
- Authority
- JP
- Japan
- Prior art keywords
- sprue
- hollow body
- stretch
- polyester hollow
- position corresponding
- 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
Links
- 229920000728 polyester Polymers 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 208000015943 Coeliac disease Diseases 0.000 description 36
- 238000000071 blow moulding Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002087 whitening effect Effects 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
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は延伸吹込ポリエステル中空体およびそ
の成形工具に関し、さらに詳しくは底部外面の中
央部近傍が凸部を有することなく平坦な延伸吹込
ポリエステル中空体およびその成形工具に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stretch-blown polyester hollow body and a molding tool thereof, and more particularly to a stretch-blown polyester hollow body whose bottom outer surface is flat near the center without a convex portion, and a molding tool thereof.
延伸吹込ポリエステル中空体は、その透明性、
強度、耐衝撃性およびガスバリヤー性等の諸性質
が優れている点を着目され、最近食品用容器等へ
の実用が伸びている。このような延伸吹込中空体
の素材として射出成形有底パリソンが使用される
場合が多い。しかしこの種の有底パリソンは、通
常スプルと呼ばれる射出成形時のゲート（gate）
部が底部中央外面に突出している。このスプル
は、ポリエステル樹脂の種類によつては、（例え
ばポリエチレンテレフタレートの場合などに、）
射出成形のさいに白化することがある。この白化
したスプルをつけたまま、延伸棒先端と金型底面
の間でスプルを押し潰しながら延伸吹込成形を行
なうと、中空体の底部に白雲状の濁つた部分が拡
がる。この濁りは、全体が透明である中空体の外
観を損い、かつ通常一様に薄肉の底部の強度を劣
化させるおそれがある。（白色は結晶化にもとづ
くものであり、従つて上記濁つた部分は結晶化に
より脆化しているためと考えられる）。このよう
な問題を解決する一つの方法は、特開昭52−
109565号に提案されているように、延伸吹込成形
前に有底パリソンからスプルを切断等によつて除
去することであるが、これには特別の除去装置を
必要とし、またそのための工程が増えるという欠
点がある。スプルを除去することなく上記問題を
解決する手段として、特開昭52−114661号に延伸
吹込成形のさいに、スプルを中空成形体の外底面
中央に偏平凸部として残すことが提案されてい
る。しかし底部外面に凸部を残すことは、底部
に製造年月日等を捺印するさいの障碍となる、
底部全体が凸部を除いて平坦な場合は、中空体の
正立安定性を損ねる、凸部が偏平であつても、
その角隅によつて幼児等が柔かい指等に怪我をす
るおそれがある等の問題を生ずる。 Stretch-blown polyester hollow bodies are characterized by their transparency,
It has attracted attention for its excellent properties such as strength, impact resistance, and gas barrier properties, and has recently been increasingly used in food containers. Injection molded bottomed parisons are often used as the raw material for such stretch-blown hollow bodies. However, this type of bottomed parison is usually connected to a gate during injection molding called a sprue.
protrudes from the center outer surface of the bottom. This sprue may vary depending on the type of polyester resin (for example, in the case of polyethylene terephthalate).
Whitening may occur during injection molding. If stretch blow molding is performed with this whitened sprue attached while crushing the sprue between the tip of the stretching rod and the bottom of the mold, a white cloud-like cloudy part will spread at the bottom of the hollow body. This turbidity may impair the appearance of the hollow body, which is entirely transparent, and may deteriorate the strength of the normally thin bottom portion. (The white color is due to crystallization, and therefore the cloudy portion is considered to be brittle due to crystallization.) One way to solve such problems is to
As proposed in No. 109565, the sprue is removed from the bottomed parison by cutting or the like before stretch blow molding, but this requires special removal equipment and increases the number of steps. There is a drawback. As a means to solve the above problem without removing the sprue, Japanese Patent Application Laid-Open No. 114661/1983 proposes to leave the sprue as a flat convex part at the center of the outer bottom surface of the hollow molded body during stretch blow molding. . However, leaving a convex part on the outer surface of the bottom becomes an obstacle when stamping the date of manufacture etc. on the bottom.
If the entire bottom is flat except for the convex part, even if the convex part is flat, it will impair the upright stability of the hollow body.
The corners cause problems such as the risk of injury to the soft fingers of young children.
本発明は以上のような従来技術に鑑みなされた
ものであつて、本発明の目的は、射出成形による
有底パリソンのスプルを除去することなく延伸吹
込によつて成形されたポリエステル中空体であつ
て、しかも底部外面のスプルに対応する位置に凸
部が形成されていないポリエステル中空体および
その成形工具を提供することにある。 The present invention has been made in view of the prior art as described above, and an object of the present invention is to provide a polyester hollow body formed by stretch blowing without removing the sprue of a bottomed parison formed by injection molding. Another object of the present invention is to provide a polyester hollow body in which no convex portion is formed at a position corresponding to the sprue on the outer surface of the bottom, and a molding tool thereof.
上記目的を達成するため、本発明は底部にスプ
ルを有する射出成形パリソンより延伸吹込によつ
て成形されたポリエステル中空体において、上記
ポリエステル中空体の底部外面の上記スプルに対
応する位置の面が、その近傍の面とほぼ同一面上
にあり、かつ上記ポリエステル中空体の底部内面
の上記スプルに対応する位置に凸部が形成されて
いることを特徴とする延伸吹込ポリエステル中空
体を提供するものである。 To achieve the above object, the present invention provides a polyester hollow body molded by stretch blowing from an injection molded parison having a sprue at the bottom, in which a surface of the bottom outer surface of the polyester hollow body at a position corresponding to the sprue is This invention provides a stretch-blown polyester hollow body, characterized in that a convex portion is formed on the same plane as the neighboring surface and at a position corresponding to the sprue on the inner surface of the bottom of the polyester hollow body. be.
さらに本発明は、底部にスプルを有する射出成
形パリソンより延伸吹込によつてポリエステル中
空体を製造するための成形工具において、上記成
形工具は延伸棒および底型を有し、該延伸棒の上
記パリソンの底部の内面と接触すべき端面の上記
スプルに対応する位置に、内容積が上記スプルの
体積とほぼ等しい凹部が形成されており、該底型
は上記スプルと対応する位置に、該延伸棒の軸線
方向に延びる上記スプルを挿入可能な長孔が形成
されており、かつ該長孔には該長孔に挿入された
上記スプルを押圧可能なプランジヤが挿通してい
ることを特徴とする延伸吹込ポリエステル中空体
の成形工具を提供するものである。 Furthermore, the present invention provides a forming tool for manufacturing a polyester hollow body by stretch blowing from an injection molded parison having a sprue at the bottom, wherein the forming tool has a drawing rod and a bottom mold, A recess whose internal volume is approximately equal to the volume of the sprue is formed at a position corresponding to the sprue on the end surface that is to be in contact with the inner surface of the bottom of the bottom mold, and the bottom mold is formed at a position corresponding to the sprue. An elongated hole extending in the axial direction into which the sprue can be inserted is formed, and a plunger capable of pressing the sprue inserted into the elongated hole is inserted through the elongated hole. A tool for forming a blown polyester hollow body is provided.
以下図面を参照しながら、本発明について説明
する。 The present invention will be described below with reference to the drawings.
第１図および第２図は、本発明の延伸吹込ポリ
エステル中空体の１実施例であるボルト１を示し
たものである。ボルト１の底部２の外面の中央部
２ａは、延伸吹込成形前のパリソン３においてス
プル４（第３図参照）が存在した位置に対応する
ものであつて、外面中央部２ａおよびその近傍は
平坦であつて段差等は形成されていない。一方底
部２の内面の中央部２ｂには凸部５が形成されて
いる。凸部５の形状は、第２図では円形である
が、３角形、６角形等の多角形、あるいは楕円形
等の任意の形状とすることができる。スプル４を
形成していた樹脂は、大部分が凸部５を含む肉厚
部６に封じ込められている。従つて肉厚部６を形
成する樹脂は白化従つて脆化している場合がある
が、そのような場合でも、肉厚部６は底部の他の
部分にくらべて肉厚が大きいので、内圧の上昇や
落下時の衝撃等によつて破損するというおそれは
ない。 FIG. 1 and FIG. 2 show a bolt 1 which is an embodiment of the stretch-blown polyester hollow body of the present invention. The center part 2a of the outer surface of the bottom part 2 of the bolt 1 corresponds to the position where the sprue 4 (see FIG. 3) existed in the parison 3 before stretch blow molding, and the outer surface center part 2a and its vicinity are flat. However, no steps or the like are formed. On the other hand, a convex portion 5 is formed in the center portion 2b of the inner surface of the bottom portion 2. Although the shape of the convex portion 5 is circular in FIG. 2, it can be any shape such as a polygon such as a triangle or a hexagon, or an ellipse. Most of the resin forming the sprue 4 is confined in the thick part 6 including the convex part 5. Therefore, the resin forming the thick part 6 may become white and become brittle, but even in such a case, the thick part 6 is thicker than other parts of the bottom, so the internal pressure can be reduced. There is no risk of damage due to impact when rising or falling.
以上のような本発明の中空体は、以下に述べる
ような成形工具によつて製造される。 The hollow body of the present invention as described above is manufactured using a forming tool as described below.
第３図は、射出成形有底パリソン３が延伸吹込
成形金型７内に装入されて、延伸吹込が始まる直
前の状態を示したものである。延伸吹込成形金型
７は、割型８、ネツク型９および底型１０より主
としてなつている。底型１０の上部は割型８の底
部中央に設けられた貫通孔に嵌入されており、そ
の上面１０ａは割型８の底面８ａと連続して延伸
吹込成型金型７の底面を形成している。上面１０
ａは延伸棒１１によつて押し上げられたパリソン
３のスプルが挿入されるべき延伸棒１１の軸線方
向に延びる長孔１０ｂの部分（通常は中央部）を
除いて平坦である。また上面１０ａは第３図では
平面となつているが、任意の曲面をもとり得るも
のである。長孔１０ｂの内径は、スプル４が挿入
可能な程度に大きいように定められている。長孔
１０ｂには、その内部を摺動可能なプランジヤ１
２が挿通している。プランジヤ１２の上下方向へ
の摺動は、下部に設けられた油圧シリンダ（図示
せず）等の駆動機構によつて行なわれる。プラン
ジヤ１２の上端面１２ａは、プランジヤ１２が上
死点に達したとき、底型１０の上面１０ａと連続
した面を形成するように構成されている。 FIG. 3 shows the injection molded bottomed parison 3 inserted into the stretch blow mold 7 and immediately before stretch blowing begins. The stretch blow molding mold 7 mainly consists of a split mold 8, a neck mold 9 and a bottom mold 10. The upper part of the bottom mold 10 is fitted into a through hole provided at the center of the bottom of the split mold 8, and its upper surface 10a is continuous with the bottom surface 8a of the split mold 8 and forms the bottom surface of the stretch blow molding mold 7. There is. Top surface 10
A is flat except for a portion (usually the central portion) of a long hole 10b extending in the axial direction of the stretching rod 11 into which the sprue of the parison 3 pushed up by the stretching rod 11 is inserted. Further, although the upper surface 10a is shown as a flat surface in FIG. 3, it may have an arbitrary curved surface. The inner diameter of the long hole 10b is determined to be large enough to allow insertion of the sprue 4. The elongated hole 10b has a plunger 1 that is slidable inside the elongated hole 10b.
2 is inserted. Sliding of the plunger 12 in the vertical direction is performed by a drive mechanism such as a hydraulic cylinder (not shown) provided at the bottom. The upper end surface 12a of the plunger 12 is configured to form a continuous surface with the upper surface 10a of the bottom mold 10 when the plunger 12 reaches the top dead center.
延伸棒１１の下端面のスプル４と対応する位置
（通常は中央部）に、凹部１１ａが設けられてい
る。凹部１１ａの内容積はスプル４の体積とほぼ
等しく、従つてスプル４がプランジヤ１２によつ
て押圧された後のボルト底部の外面中央部２ａ附
近がほぼ平坦になるように定められる。 A recess 11a is provided on the lower end surface of the stretching rod 11 at a position corresponding to the sprue 4 (usually at the center). The internal volume of the recess 11a is approximately equal to the volume of the sprue 4, and is therefore determined so that after the sprue 4 is pressed by the plunger 12, the vicinity of the center portion 2a of the outer surface of the bolt bottom becomes approximately flat.
以上の装置において延伸吹込成形は次のように
して行なわれる。適当な温度に加熱された例えば
ポリエチレンテレフタレートよりなる射出成形有
底パリソン３は、底伸棒１１によつて第４図に示
されるように、その底部が底型の上面１０ａと接
触するまで軸線方向に延伸される。そのさいスプ
ル４は長孔１０ｂ内に挿入される。上記延伸のさ
い延伸棒１１内に設けられた吹込孔１１ｂを通つ
て空気等の気体が延伸中のパリソン内にパリソン
と延伸棒の密着を防止するため、送入される。延
伸終了後上記気体が高圧下に圧入されて、吹込成
形が行なわれて、成形されたパリソンの外面は延
伸吹込成形金型７の内面に密着する。同時にプラ
ンジヤ１２が上昇して、第４図および第５図に示
すように主としてスプル４に接しているパリソン
底部部分２ｃを延伸棒１１の凹部１１ａに押入し
て、ボトル底部２のほぼ平坦な外面中央部２ａお
よび凸部５を形成する。なおプランジヤ１２の上
昇は、吹込成形の直前もしくは直後に行なつても
よい。以上のようにして成形が終了した後、割型
８を開いて、成形されたボルト１を取出し、また
プランジヤ１２を下降させる。 Stretch blow molding is carried out in the above apparatus as follows. The injection-molded bottomed parison 3 made of polyethylene terephthalate, for example, heated to an appropriate temperature is pushed in the axial direction by the bottom extension rod 11 until its bottom comes into contact with the top surface 10a of the bottom mold, as shown in FIG. It is stretched to At that time, the sprue 4 is inserted into the elongated hole 10b. During the stretching, a gas such as air is introduced into the parison being stretched through the blow hole 11b provided in the stretching bar 11 in order to prevent the parison from coming into close contact with the stretching bar. After the stretching is completed, the above gas is injected under high pressure to perform blow molding, and the outer surface of the molded parison is brought into close contact with the inner surface of the stretch blow molding mold 7. At the same time, the plunger 12 rises and pushes the parison bottom part 2c, which is mainly in contact with the sprue 4, into the recess 11a of the stretching rod 11, as shown in FIGS. A central portion 2a and a convex portion 5 are formed. Note that the plunger 12 may be raised immediately before or after blow molding. After the molding is completed as described above, the split mold 8 is opened, the molded bolt 1 is taken out, and the plunger 12 is lowered.
本発明の延伸吹込ポリエステル中空体は、本発
明の成形工具を用いて射出成形有底パリソンのス
プルを除去することなく延伸吹込成形されるの
で、特別のスプル除去装置を必要とせず、またそ
のための工程も増えないので、スプルを除去する
場合に比べて製造コストが安い。またポリエチレ
ンテレフタレートのようにスプルが白化し易い材
料を用いた場合でも、白化部は肉厚に閉じこめら
れるので、底部の外観や強度が損なわれるおそれ
がない。さらに底面外面にはスプルにもとづく突
出部はないので、捺印性や正立安立性さらには安
全性に優れているという効果を有する。 The stretch-blown polyester hollow body of the present invention is stretch-blown molded using the molding tool of the present invention without removing the sprue of the injection-molded bottomed parison, so there is no need for a special sprue removal device, and there is no need for a special sprue removal device. Since there are no additional steps, manufacturing costs are lower than when sprues are removed. Furthermore, even when the sprue is made of a material that easily whitens, such as polyethylene terephthalate, the whitened portion is confined within the wall thickness, so there is no risk of the appearance or strength of the bottom being impaired. Furthermore, since there is no protrusion based on the sprue on the outer surface of the bottom surface, it has the effect of being excellent in stampability, erecting stability, and safety.
第１図は本発明の延伸吹込ポリエステル中空体
の一実施例の一部断面正面図、第２図は第１図の
−線に沿う中空体底部の内面を示す断面図、
第３図は本発明の中空体を製造する金型の１例の
縦断面図、第４図は本発明の中空体の底部成形直
前の状態を示す要部拡大縦断面図、第５図は本発
明の中空体の底部成形直後の状態を示す要部拡大
縦断面図である。
１……ボルト（延伸吹込ポリエステル中空
体）、２……底部、２ａ……外面中央部（底部外
面のスプルに対応する位置）、２ｂ……底部内面
中央部（底部内面のスプルに対応する位置）、３
……射出成形パリソン、４……スプル、５……凸
部、１０……底型、１０ｂ……長孔、１１……延
伸棒、１１ａ……凹部、１２……プランジヤ。
FIG. 1 is a partially sectional front view of an embodiment of the stretched blown polyester hollow body of the present invention, and FIG. 2 is a sectional view showing the inner surface of the bottom of the hollow body along the line - in FIG. 1.
FIG. 3 is a vertical cross-sectional view of an example of a mold for manufacturing the hollow body of the present invention, FIG. 4 is an enlarged vertical cross-sectional view of the main part showing the state of the hollow body of the present invention immediately before the bottom part is molded, and FIG. FIG. 2 is an enlarged longitudinal cross-sectional view of the main part of the hollow body of the present invention, showing the state immediately after the bottom part is molded. 1...Bolt (stretched blown polyester hollow body), 2...Bottom, 2a...Central part of outer surface (position corresponding to the sprue on the outer surface of the bottom), 2b...Central part of the inner surface of the bottom (position corresponding to the sprue on the inner surface of the bottom) ), 3
... Injection molded parison, 4 ... Sprue, 5 ... Convex portion, 10 ... Bottom mold, 10b ... Elongated hole, 11 ... Stretching rod, 11a ... Recess, 12 ... Plunger.
Claims (1)
延伸吹込によつて成形されたポリエステル中空体
において、上記ポリエステル中空体の底部外面の
上記スプルに対応する位置の面が、その近傍の面
とほぼ同一面上にあり、かつ上記ポリエステル中
空体の底部内面の上記スプルに対応する位置に凸
部が形成されていることを特徴とする延伸吹込ポ
リエステル中空体。 ２ 底部にスプルを有する射出成形パリソンより
延伸吹込によつてポリエステル中空体を製造する
ための成形工具において、上記成形工具は延伸棒
および底型を有し、該延伸棒の上記パリソンの底
部の内面と接触すべき端面の上記スプルに対応す
る位置に、内容積が上記スプルの体積とほぼ等し
い凹部が形成されており、該底型は上記スプルと
対応する位置に、該延伸棒の軸線方向に延びる上
記スプルを挿入可能な長孔が形成されており、か
つ該長孔には該長孔に挿入された上記スプルを押
圧可能なプランジヤが挿通していることを特徴と
する延伸吹込ポリエステル中空体の成形工具。[Scope of Claims] 1. In a polyester hollow body molded by stretch blowing from an injection molded parison having a sprue at the bottom, a surface of the bottom outer surface of the polyester hollow body at a position corresponding to the sprue is located in the vicinity of the polyester hollow body. A stretch-blown polyester hollow body, characterized in that a convex portion is formed on the same plane as the polyester hollow body and at a position corresponding to the sprue on the bottom inner surface of the polyester hollow body. 2. A forming tool for producing a polyester hollow body by stretch blowing from an injection molded parison having a sprue at the bottom, the forming tool having a stretch rod and a bottom die, and the inner surface of the bottom of the parison of the stretch rod. A recess whose internal volume is approximately equal to the volume of the sprue is formed at a position corresponding to the sprue on the end surface to be in contact with the sprue, and the bottom mold is formed at a position corresponding to the sprue in the axial direction of the stretching rod. A stretch-blown polyester hollow body, characterized in that an elongated hole is formed into which the extending sprue can be inserted, and a plunger that can press the sprue inserted into the elongated hole is inserted through the elongated hole. molding tools.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2401680A JPS56120320A (en) | 1980-02-29 | 1980-02-29 | Blow-molded hollow body of orientation polyester and its molding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2401680A JPS56120320A (en) | 1980-02-29 | 1980-02-29 | Blow-molded hollow body of orientation polyester and its molding tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56120320A JPS56120320A (en) | 1981-09-21 |
| JPS6257493B2 true JPS6257493B2 (en) | 1987-12-01 |
Family
ID=12126738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2401680A Granted JPS56120320A (en) | 1980-02-29 | 1980-02-29 | Blow-molded hollow body of orientation polyester and its molding tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56120320A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198248A (en) * | 1990-03-05 | 1993-03-30 | Continental Pet Technologies, Inc. | Blow mold for forming a refillable polyester container |
| US5066528A (en) * | 1990-03-05 | 1991-11-19 | Continental Pet Technologies, Inc. | Refillable polyester container and preform for forming the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114661A (en) * | 1976-03-23 | 1977-09-26 | Katashi Aoki | Drawing blow molding method and blow mold |
-
1980
- 1980-02-29 JP JP2401680A patent/JPS56120320A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114661A (en) * | 1976-03-23 | 1977-09-26 | Katashi Aoki | Drawing blow molding method and blow mold |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56120320A (en) | 1981-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5850576B2 (en) | Stretch blow molding method for synthetic resin bottles with base caps | |
| US5178816A (en) | Method of molding heat-resistant vessel having thick portion on body | |
| JP3677690B2 (en) | Stretch blow molding method for hollow molded products such as lighting gloves | |
| KR960010218A (en) | Stretch Blow Molding Method for Large Containers | |
| ATE91955T1 (en) | DEVICE FOR PRODUCTION OF A PLASTIC HOLLOW BODY WITH BODY PART MOLDED BY BLOWING. | |
| JPS57210829A (en) | Molding of synthetic resin made bottle by biaxial stretch blow molding | |
| JPS6257493B2 (en) | ||
| US20020070191A1 (en) | Neck finish for a container and mold for forming the container | |
| JPH0677958B2 (en) | Injection blow molding method for synthetic resin containers | |
| JPS6232826Y2 (en) | ||
| JPS6096434A (en) | Injection blow molding method | |
| JPS58203022A (en) | Manufacture of double walled hollow object | |
| US6872354B1 (en) | Parison and blow molding method for bottle having undercut | |
| US7374419B2 (en) | Gating structure for mold | |
| US3205287A (en) | Method and apparatus for manufacturing hollow plastic articles | |
| JPS5837895B2 (en) | Stretch blow molding method and blow mold | |
| JPS621901B2 (en) | ||
| JPH11333911A (en) | Production of two-layer preform | |
| JPH059258B2 (en) | ||
| JPS6030168Y2 (en) | Polyethylene terephthalate resin bottle | |
| JPS5949893B2 (en) | Mouth and neck stretching method for saturated polyester resin bottles | |
| AU2001221150B2 (en) | Parison and blow molding method for bottle having undercut | |
| JP2565062B2 (en) | Manufacturing method of blow molded product with ribs | |
| JPH08198256A (en) | Synthetic resin container in double structure, and its manufacture | |
| JPH0272925A (en) | Manufacture of stretched blow bottle with handle |