JPH0466171B2 - - Google Patents
Info
- Publication number
- JPH0466171B2 JPH0466171B2 JP61299838A JP29983886A JPH0466171B2 JP H0466171 B2 JPH0466171 B2 JP H0466171B2 JP 61299838 A JP61299838 A JP 61299838A JP 29983886 A JP29983886 A JP 29983886A JP H0466171 B2 JPH0466171 B2 JP H0466171B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- nest
- bent
- mold cavity
- 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
Links
- 238000001125 extrusion Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4242—Means for deforming the parison prior to the blowing operation
-
- 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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4242—Means for deforming the parison prior to the blowing operation
- B29C49/4244—Means for deforming the parison prior to the blowing operation during or after laying preform into the final mould
- B29C49/4245—Means for deforming the parison prior to the blowing operation during or after laying preform into the final mould aided by air floating
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming 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、二次元又は三次元的に屈曲する合成
樹脂屈曲製品の吹成成形において屈曲した型巣内
にパリソンを導入する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for introducing a parison into a bent mold cavity during blow molding of a synthetic resin bent product that is bent in two or three dimensions.
（従来の技術）
従来、この種の屈曲型巣内へのパリソン導入方
法として、本発明がさきに開発した屈曲製品の吹
成成形方法（特許第1215482号）において、パリ
ソンを屈曲型巣内にその開口上端から降下挿入す
ると共に、該屈曲型巣内にその開口下端から外部
への吸引作用を加え、該吸引によりパリソンを屈
曲型巣内に挿通させる方法が開示された。しか
し、この従来のパリソン導入方法のみの使用で
は、屈曲型巣内に導入されたパリソンの屈曲部分
に折れ重なりやひだ寄せが生じて、その部分が肉
厚となり、製品の品質を著しく損う場合がある。(Prior art) Conventionally, as a method for introducing a parison into this type of bending type nest, in the blow molding method for a bent product (Patent No. 1215482) developed earlier by the present invention, a parison was introduced into a bending type nest. A method has been disclosed in which the parison is inserted downward from the upper end of the opening, and a suction action is applied to the outside from the lower end of the opening into the bent nest, and the parison is inserted into the bent nest by the suction. However, if only this conventional method of introducing the parison is used, the bent part of the parison introduced into the bent nest may fold or scrunch, resulting in a thick wall and significantly impairing the quality of the product. There is.
（発明が解決しようとする問題点）
本発明は、パリソンの屈曲部分での折れ重なり
やひだ寄せの発生を防止し、品質の向上を実現す
ることができる屈曲型巣内へのパリソン導入方法
を提供することを目的とする。(Problems to be Solved by the Invention) The present invention provides a method for introducing a parison into a bent nest, which can prevent folding and folding at the bent portion of the parison and improve quality. The purpose is to provide.
（問題点を解決するための手段）
上記目的を達成するため、本発明者は種々実験
研究を重ねた結果、屈曲型巣内に供給するパリソ
ンを横断面が真円に近く且均一な肉厚のものにす
ることが有効であることを確認し、それに基づい
て本発明方法は、
一端に上方に開口し、他端を開口する屈曲型巣
に対し、
横断面がほぼ真円で且均一肉厚のパリソンを上
記屈曲型巣内にその上端開口から降下挿入すると
共に、
上記屈曲型巣内における上記パリソンの外側及
び内側を流れて他端開口から外部に流出する気流
を加え、該気流によりパリソンを屈曲型巣内に案
内する、
構成をとつたのである。以下図面を参照して本
発明の実施例を説明する。(Means for Solving the Problems) In order to achieve the above object, the present inventor has conducted various experimental studies and found that the parison to be supplied into the bent nest has a cross section close to a perfect circle and a uniform wall thickness. Based on this, the method of the present invention has been developed to create a curved nest with an almost perfect circular cross section and uniform thickness, in contrast to a curved nest that opens upward at one end and opens at the other end. A parison with a thickness of The structure was designed to guide the body into the bent nest. Embodiments of the present invention will be described below with reference to the drawings.
まず、屈曲型巣を形成すべき一対の割型１，１
は、第１，２図示のようにその閉成面に本例では
Ｌ字状の屈曲型巣半面２，２をそれぞれ形成し、
該型巣半面２，２は、その一端に割型１，１の上
側面に開口する型巣入口半面３，３を、その他端
に割型１，１の左右側面に開口する型巣出口半面
４，４をそれぞれ有する。 First, a pair of split molds 1, 1 to form a bent nest.
As shown in the first and second figures, in this example, L-shaped curved nest half surfaces 2, 2 are formed on the closing surfaces, respectively,
The mold cavity half surfaces 2, 2 have a mold cavity inlet half surface 3, 3 that opens on the upper side of the split molds 1, 1 at one end, and a mold cavity exit half surface that opens on the left and right side surfaces of the split molds 1, 1 on the other end. 4 and 4 respectively.
パリソンを供給すべき押出機５は、第１図示の
ように上記一対の割型１，１の閉成時における一
対の型巣入口半面３，３で形成される型巣入口の
上方に昇降自在のパリソン押出ダイ６を有し、該
押出ダイ６は、その下面に、ほぼ真円の環状孔で
あつて孔巾の均一なパリソン押出成形孔７及その
中心部にエアブローノズル８を開設してある。 As shown in the first diagram, the extruder 5 to which the parison is to be supplied is movable up and down above the mold cavity entrance formed by the pair of mold cavity entrance halves 3, 3 when the pair of split molds 1, 1 are closed. The extrusion die 6 has a parison extrusion molding hole 7, which is a substantially perfect circular annular hole with a uniform hole width, on the lower surface thereof, and an air blow nozzle 8 in the center thereof. be.
屈曲型巣内へのパリソン導入方法は次のようで
ある。まず、一対の割型１，１を閉成して一対の
屈曲型巣半面２，２からなる両端開口のＬ字状屈
曲型巣を形成する。ついで第３図示のように押出
ダイ６を閉成割型１，１の上面から若干上昇させ
た状態で押出成形孔７から横断面ほぼ真円で且均
一肉厚のパリソンＰを押出して上記屈曲型巣内に
型巣入口半面３，３からなる型巣入口から挿入降
下させ、それと共に型巣出口半面４，４からなる
型巣出口にバキユーム装置に接続された吸引カツ
プ１１を当接し、該カツプ１１を通じて吸引作用
を型巣内に加え、それにより型巣入口から型巣内
に流入してパリソンＰの外側を流れて型巣出口か
らカツプ１１を経て外部に流出する気流を生起さ
せると共に、押出ダイ６のエアブローノズル８か
らエアを吹出させ、それによりパリソンＰの内側
を流れて型巣出口から同じカツプ１１を経て外部
へ流出する気流をも付与し、これら両気流により
パリソンＰを案内して型巣内に導入していく。こ
の場合パリソンＰの内、外の気圧はほぼ等しくす
るのが望ましい。型巣の屈曲部においては、パリ
ソンＰが、ほぼ真円で肉厚が均一であるため一部
に応力が集中することがなく、しかも内、外側を
流れる気流によつてその横断面形状を保持してい
るから、屈曲部に沿つて円滑に屈曲し、折れ重な
りやひだ寄せが生じることはない。 The method for introducing the parison into the bent nest is as follows. First, a pair of split molds 1, 1 are closed to form an L-shaped bent cavity with openings at both ends, consisting of a pair of bent cavity halves 2, 2. Next, as shown in the third figure, with the extrusion die 6 slightly raised from the upper surface of the closed split molds 1, 1, a parison P having a substantially perfect circular cross section and a uniform thickness is extruded from the extrusion forming hole 7, and the parison P is bent as described above. It is inserted and lowered into the mold cavity from the mold cavity inlet consisting of the mold cavity inlet halves 3, 3, and at the same time, the suction cup 11 connected to the vacuum device is brought into contact with the mold cavity outlet consisting of the mold cavity outlet halves 4, 4. Applying a suction action into the mold cavity through the cup 11, thereby generating an air flow that flows into the mold cavity from the mold cavity entrance, flows outside the parison P, and flows out from the mold cavity exit through the cup 11, and Air is blown out from the air blow nozzle 8 of the extrusion die 6, thereby also providing an air current that flows inside the parison P and flows out from the mold cavity exit through the same cup 11 to the outside, and the parison P is guided by these air flows. and then introduce it into the mold nest. In this case, it is desirable that the air pressure inside and outside the parison P be approximately equal. At the bending part of the mold cavity, the parison P is almost perfectly circular and has a uniform wall thickness, so stress does not concentrate in one part, and the cross-sectional shape is maintained by the airflow flowing inside and outside. Because of this, it bends smoothly along the bend, without folding or folding.
パリソンＰの先端部が型巣出口からカツプ１１
内に若干突出したらパリソンの押出し及びバキユ
ーム装置による吸引を停止し、ついで第４図示の
ようにう押出ダイ６を降下させて型巣入口をほぼ
閉成し、又パリソンＰの先端部を、上記カツプ１
１に設けられた一対のシールシヤツタ９，９をエ
アシリンダ１０，１０により閉じることにより挾
着シールすると共に、該シヤツタ９，９の閉成と
カツプ１１により型巣出口を閉成する。このよう
にすれば、エアブローノズル８から引き続き吹き
出されるエアによりパリソンＰが吹きふくらまさ
れ、所期の屈曲製品の成形を行う。成形後、押出
ダイ６を若干上昇させると共に押出ダイと割型間
のパリソンを切断分離し、又、シヤツタ９，９を
開くと共にカツプ１１を後退させ、しかる後割型
１，１を開いて成形品を取り出す。 The tip of the parison P is connected to the cup 11 from the mold cavity exit.
When the parison protrudes slightly inward, the extrusion of the parison and the suction by the vacuum device are stopped, and then the extrusion die 6 is lowered as shown in Figure 4 to almost close the mold cavity entrance, and the tip of the parison P is Cup 1
A pair of seal shutters 9, 9 provided at 1 are closed by air cylinders 10, 10 to clamp and seal, and the mold cavity outlet is closed by closing the shutters 9, 9 and cup 11. In this way, the parison P is inflated by the air continuously blown out from the air blow nozzle 8, and the desired bent product is formed. After molding, the extrusion die 6 is raised slightly and the parison between the extrusion die and the split mold is cut and separated, and the shutters 9, 9 are opened and the cup 11 is retracted, and then the split molds 1, 1 are opened and molded. Take out the item.
（発明の効果）
本発明の屈曲型巣内へのパリソン導入方法によ
れば、屈曲型巣内に導入されるパリソンは横断面
がほぼ真円で且均一肉厚であるから、屈曲型巣の
屈曲部分に沿つて曲がる際、部分的に応力が集中
することがなく、しかも内、外側を流れる気流に
よつてその横断面形状を保持されているから、折
れ重なりやひだ寄せを生じることなく円滑に曲が
ることができ、品質の向上を実現できるのであ
る。(Effects of the Invention) According to the method of introducing a parison into a curved nest according to the present invention, the parison introduced into a curved nest has a substantially perfect circular cross section and a uniform wall thickness. When bending along a bend, stress does not concentrate locally, and the cross-sectional shape is maintained by the airflow flowing inside and outside, so it is smooth without folding or gathering. This allows for improved quality.
図面は本発明の実施例を示し、第１図は閉成状
態の割型の一部切欠側面図、第２図は第１図の
−線断面図、第３図はパリソン導入段階の一部
切欠側面図、第４図はシール段階の一部切欠側面
図である。
１……割型、２……屈曲型巣半面、３……型巣
入口半面、４……型巣出口半面、Ｐ……パリソ
ン。
The drawings show an embodiment of the invention, in which FIG. 1 is a partially cutaway side view of the split mold in a closed state, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a part of the parison introduction stage. FIG. 4 is a partially cutaway side view of the sealing stage. 1...Split mold, 2...Half surface of curved nest, 3...Half surface of entrance of mold nest, 4...Half surface of exit of mold nest, P...Parison.
Claims (1)
巣に対し、 横断面がほぼ真円で且均一肉厚のパリソンを上
記屈曲型巣内にその上端開口から降下挿入すると
共に、 上記屈曲型巣内における上記パリソンの外側及
び内側を流れて他端開口から外部に流出する気流
を加え、該気流によりパリソンを屈曲型巣内に案
内する、 屈曲型巣内へのパリソン導入方法[Claims] 1. For a bent nest that opens upward at one end and opens at the other end, a parison with an almost perfect circular cross section and a uniform wall thickness is lowered into the bent nest from the opening at its upper end. At the same time as inserting the parison into the bent nest, apply an airflow flowing outside and inside the parison in the bent nest and flowing out from the other end opening, and guide the parison into the bent nest by the airflow. How to introduce parison
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299838A JPS63153114A (en) | 1986-12-18 | 1986-12-18 | Introdction of parison into bent mold cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61299838A JPS63153114A (en) | 1986-12-18 | 1986-12-18 | Introdction of parison into bent mold cavity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153114A JPS63153114A (en) | 1988-06-25 |
| JPH0466171B2 true JPH0466171B2 (en) | 1992-10-22 |
Family
ID=17877538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61299838A Granted JPS63153114A (en) | 1986-12-18 | 1986-12-18 | Introdction of parison into bent mold cavity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153114A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2746339B1 (en) * | 1996-03-22 | 1998-06-05 | Plastic Omnium Cie | METHOD FOR MANUFACTURING A BEAM OF ATTACHED TUBES, DEVICE FOR CARRYING OUT SUCH A METHOD AND BEAM THUS PRODUCED |
| DE10308447A1 (en) * | 2003-02-24 | 2004-09-09 | Etimex Technical Components Gmbh | Method and device for producing seamless molded articles |
| DE10308446A1 (en) * | 2003-02-24 | 2004-09-09 | Etimex Technical Components Gmbh | Method and device for producing seamless molded articles |
| DE102005038638B4 (en) * | 2005-08-09 | 2013-01-17 | Maik Hentschel | Device for blow-molding extruded preforms made of thermoplastics |
| CN110065218B (en) * | 2019-05-30 | 2021-08-24 | 佛山市前锋实业有限公司 | Extrusion, drawing and blowing processing method of plastic bent bottle |
| CN112549501B (en) * | 2020-11-24 | 2022-08-16 | 亚普汽车部件股份有限公司 | Hollow body internal cooling gas guide forming method |
-
1986
- 1986-12-18 JP JP61299838A patent/JPS63153114A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63153114A (en) | 1988-06-25 |
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