JPH04819B2 - - Google Patents
Info
- Publication number
- JPH04819B2 JPH04819B2 JP60256188A JP25618885A JPH04819B2 JP H04819 B2 JPH04819 B2 JP H04819B2 JP 60256188 A JP60256188 A JP 60256188A JP 25618885 A JP25618885 A JP 25618885A JP H04819 B2 JPH04819 B2 JP H04819B2
- Authority
- JP
- Japan
- Prior art keywords
- molten resin
- die
- ring
- passage
- slit
- 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
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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/302—Extrusion nozzles or dies being adjustable, i.e. having adjustable exit sections
-
- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (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、ガソリンタンク等の中空の容器をブ
ロー成形する際に、形状の複雑な部分がブロー比
の違いで部分的に薄肉となるのを防ぐようにし
た、ブロー成形装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to blow molding hollow containers such as gasoline tanks, in which parts with complex shapes become partially thin due to differences in blow ratio. This invention relates to a blow molding device that is designed to prevent.
［従来の技術］
ブロー成形によつて樹脂製の中空容器を成形す
る方法は、自由な形状の中空容器が作れるので極
めて便利であるが、形状の複雑な部分はブロー比
の違いで薄肉となつてしまうことがある。[Prior art] The method of molding hollow containers made of resin by blow molding is extremely convenient as it allows hollow containers of any shape to be made, but parts with complex shapes may become thinner due to differences in blow ratio. Sometimes it happens.
ブロー成形に従来使用されている成形装置の一
例を第８図について説明すると、本体ａの中心に
はマンドレルｂがあつて、その下端にはコアｃが
固着されている。マンドレルｂの外周にはリング
プランジヤーｄが昇降可能に取付けられており、
リングプランジヤーｄの外側は溶融樹脂通路ｅに
なつていて、図示しない押出機から押し出された
溶融樹脂が樹脂入口ｆから溶融樹脂通路ｅに送ら
れるようになつている。 An example of a molding apparatus conventionally used for blow molding will be described with reference to FIG. 8. A mandrel b is located at the center of a main body a, and a core c is fixed to the lower end of the mandrel b. A ring plunger d is attached to the outer periphery of the mandrel b so that it can be raised and lowered.
The outside of the ring plunger d is a molten resin passage e, and molten resin extruded from an extruder (not shown) is sent from a resin inlet f to the molten resin passage e.
本体ａの下部にはダイｇが取付けてあつて、ダ
イｇはコアｃを中心としてその外周を囲み、コア
ｃとダイｇとの間にリング状のスリツトｈを形成
している。溶融樹脂通路ｅの下端はスリツトｈに
つながつていて、リンクプランジヤーｄを引き上
げた状態にしながら樹脂入口ｆより溶融樹脂通路
ｅ内に溶融樹脂を供給した後、リングプランジヤ
ーｄを押し下げると、溶融樹脂通路ｅ内の溶融樹
脂はスリツトｈを通つて本体ａの外に押し出さ
れ、パリソンｉに成形される。パリソンｉが薄肉
となる部分は、ダイｇの内側を削つて第９図に示
すようにスリツトｇの一部に拡開部ｊを形成し、
拡開部ｊを通つた部分が第１０図に示すように厚
肉部ｋとなるようにしてパリソンｉを成形してい
る。 A die g is attached to the lower part of the main body a, and the die g surrounds the outer periphery of the core c, forming a ring-shaped slit h between the core c and the die g. The lower end of the molten resin passage e is connected to the slit h, and after supplying molten resin into the molten resin passage e from the resin inlet f while keeping the link plunger d pulled up, when the ring plunger d is pushed down, The molten resin in the molten resin passage e is pushed out of the main body a through the slit h and is formed into a parison i. At the thinner part of the parison i, the inside of the die g is cut to form an enlarged part j in a part of the slit g, as shown in FIG.
The parison i is formed such that the portion passing through the expanded portion j becomes a thick portion k as shown in FIG.
従来行なわれている別の方法として、ダイｇを
弾性変形できるようにし、外方から直径方向の押
圧力を加えてダイｇを弾性変形させ、スリツトｈ
が一様な隙間でなく、直径方向に隔たつている２
箇所に拡開部ｊを形成してパリソンｉに薄肉部が
できないようにしている。 Another conventional method is to make the die g elastically deformable, apply a diametrical pressing force from the outside to elastically deform the die g, and form the slit h.
The gaps are not uniform, but are separated in the diametrical direction.2
Expanded portions j are formed at locations to prevent thin portions from forming in the parison i.
［発明が解決しようとする問題点］
第９図に示すようにダイｇの内側を削つてスリ
ツトｇの一部に拡開部ｊを形成する方法は、ダイ
ｇを削つた部分は、パリソンｉが縦方向に続く厚
肉部ｋとなつて無駄が多く、またパリソンｉは流
量のバランスが崩れて著しく変形蛇行するように
なり、厚肉化に制限があつた。[Problems to be Solved by the Invention] As shown in FIG. 9, the method of forming an enlarged part j in a part of the slit g by cutting the inside of the die g is such that the cut part of the die g is The parison i becomes a thick wall part k that continues in the vertical direction, which is wasteful, and the parison i loses its flow balance and becomes noticeably deformed and meandering, which limits the ability to increase the wall thickness.
また別の方法であるダイｇに直径方向の押圧力
を加えて直径方向に隔たつているスリツトｈの２
箇所に拡開部ｊを形成する方法は、スリツトｈの
変形であるためパリソンｉの変形が大きくなつて
厚肉部を形成するのに限度があり、ダイｇが対称
的に変形するので反対側は無駄肉となる。そして
ダイｇは弾性変形に耐える高価な材料を使わざる
を得ず、熱処理工程を含めてダイｇの製作に多く
の手間を必要とする欠点があつた。 Another method is to apply a diametrical pressing force to the die g to cut two slits h separated in the diametrical direction.
The method of forming the widening part j at the location is to deform the slit h, which increases the deformation of the parison i, which limits the ability to form a thick part, and because the die g deforms symmetrically, the opposite side becomes wasted meat. Moreover, the die g has to be made of an expensive material that can withstand elastic deformation, and has the disadvantage that it requires a lot of time and effort to manufacture the die g, including a heat treatment process.
本発明は簡単な手間と装置とによつて、パリソ
ンの必要な部分に必要な厚さの厚肉部を形成し、
材料に無駄がなく、コストも安くできるようにし
たブロー成形装置を提供するものである。 The present invention forms a thick part of a necessary thickness in a necessary part of a parison with simple labor and equipment,
To provide a blow molding device that does not waste material and can be manufactured at low cost.
［問題点を解決するための手段］
本発明は、下端にダイサポートによつて固定さ
れたダイを有する成形装置本体に、下端にコアを
有するマンドレルを昇降可能に挿入し、該マンド
レルにリングプランジヤを昇降可能に外嵌せしめ
て、該リングプランジヤと成形装置本体との間に
溶融樹脂通路を、また前記コアとダイの間に前記
溶融樹脂通路に連通するスリツトを形成し、前記
溶融樹脂通路に溶融樹脂を押し出す押出機を接続
し、前記ダイとダイサポートとの間にリング状樹
脂溜を形成するとともに、該リング状樹脂溜から
放射状に前記スリツトの下端に連通する肉付け用
溶融樹脂通路を設け、前記ダイサポートに前記リ
ング状樹脂溜に連通する溶融樹脂溜を形成したう
え、該溶融樹脂溜を前記押出機に連通させ、前記
ダイサポートの下方にコアを中心とする放射状の
溝を形成し、該溝に前記肉付け用溶融樹脂通路を
開閉する駒を摺動自在に嵌合したものである。[Means for Solving the Problems] The present invention provides a molding device body in which a mandrel having a core at its lower end is movably inserted into a molding device main body having a die fixed at its lower end by a die support, and a ring plunger is attached to the mandrel. A molten resin passage is formed between the ring plunger and the molding device body, and a slit communicating with the molten resin passage is formed between the core and the die. An extruder for extruding molten resin is connected to form a ring-shaped resin reservoir between the die and the die support, and a molten resin passage for filling is provided radially from the ring-shaped resin reservoir to the lower end of the slit. , forming a molten resin reservoir communicating with the ring-shaped resin reservoir in the die support, communicating the molten resin reservoir with the extruder, and forming radial grooves centered on the core below the die support; A piece for opening and closing the molten resin passage for filling is slidably fitted into the groove.
［作用］
駒を移動して肉付け用溶融樹脂通路の先端を開
いたところだけ、駒の移動量に応じた厚肉部がパ
リソンに形成される。[Function] A thick portion corresponding to the amount of movement of the piece is formed in the parison only where the tip of the molten resin passage for filling is opened by moving the piece.
［実施例］
以下、本発明の実施例を図面を参照して説明す
る。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の縦断面図であつ
て、本体１の中心にはマンドレル２がアクチユエ
ータ３で昇降できるように設けられており、マン
ドレル２の下端にはコア４が固着されている。マ
ンドレル２の外周にはフローピン５が設けてあつ
て、さらにその外周には、リングプランジヤー６
がアクチユエータ７によつて昇降できるように設
けられている。リングプランジヤー６の外側は溶
融樹脂通路８になつていて、押出機９から押し出
された溶融樹脂が樹脂入口１０から溶融樹脂通路
８に送られるようになつている。 FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, in which a mandrel 2 is provided at the center of a main body 1 so as to be able to be raised and lowered by an actuator 3, and a core 4 is fixed to the lower end of the mandrel 2. ing. A flow pin 5 is provided on the outer periphery of the mandrel 2, and a ring plunger 6 is provided on the outer periphery.
is provided so that it can be raised and lowered by an actuator 7. The outside of the ring plunger 6 is a molten resin passage 8, and the molten resin extruded from the extruder 9 is sent to the molten resin passage 8 from a resin inlet 10.
本体１の下部には、ダイ１１がダイサポート１
２に支えられていて、ダイ１１はコア４を中心と
してその外周を囲み、コア４とダイ１１との間に
リング状のスリツト１３を形成している。溶融樹
脂通路８の下端はスリツト１３につながつてい
て、リングプランジヤー６を引き上げながら押出
機９を作動させ、樹脂入口１０より溶融樹脂通路
８内に溶融樹脂を供給した後、リングプランジヤ
ー６を押し下げると、溶融樹脂通路８内の溶融樹
脂はスリツト１３を通つて本体１の外に押し出さ
れ、パリソン１４に成形される。 At the bottom of the main body 1, a die 11 is mounted on a die support 1.
The die 11 surrounds the outer periphery of the core 4 and forms a ring-shaped slit 13 between the core 4 and the die 11. The lower end of the molten resin passage 8 is connected to a slit 13, and after operating the extruder 9 while pulling up the ring plunger 6 and supplying molten resin into the molten resin passage 8 from the resin inlet 10, the ring plunger 6 When pressed down, the molten resin in the molten resin passage 8 is forced out of the main body 1 through the slit 13 and is formed into a parison 14.
押出機９には連結筒１５の上端が接続されてい
て、この連結筒１５の下端は、ダイサポート１２
の外側に取付けられている肉付け用溶融樹脂押出
装置１６に接続されている。連結筒１５の内部に
は溶融樹脂通路１７が設けてあつて、溶融樹脂通
路１７の上端は押出機９につながつており、溶融
樹脂通路１７の下端は、肉付け用溶融樹脂押出装
置１６内の溶融樹脂溜１８、ダイサポート１２内
の通路１９を介して、ダイ１１の外周とダイサポ
ート１２との間に形成されているリング状樹脂溜
２０につながつている。肉付け用溶融樹脂押出装
置１６にはアクチユエータ２１で作動されるピス
トン２２が設けてあつて、押出機９から連結筒１
５内の溶融樹脂通路１７を通つて溶融樹脂溜１８
に供給された溶融樹脂を、通路１９を介してリン
グ状樹脂溜２０に押し出すようになつている。リ
ング状樹脂溜２０の下部からは、第４図、第５図
にも示すように、複数の肉付け用溶融樹脂通路２
３が下方に向つて延びていて、肉付け用溶融樹脂
通路２３の下端は、スリツト１３下端の外側に接
している。 The upper end of a connecting cylinder 15 is connected to the extruder 9, and the lower end of this connecting cylinder 15 is connected to the die support 12.
It is connected to a molten resin extrusion device 16 for filling, which is attached to the outside of the body. A molten resin passage 17 is provided inside the connecting cylinder 15, the upper end of the molten resin passage 17 is connected to the extruder 9, and the lower end of the molten resin passage 17 is connected to the molten resin in the molten resin extrusion device 16 for filling. The resin reservoir 18 is connected to a ring-shaped resin reservoir 20 formed between the outer periphery of the die 11 and the die support 12 via a passage 19 in the die support 12 . The molten resin extrusion device 16 for filling is provided with a piston 22 operated by an actuator 21, and the piston 22 is actuated by an actuator 21.
5 through the molten resin passage 17 into the molten resin reservoir 18
The molten resin supplied to the ring is pushed out through a passage 19 into a ring-shaped resin reservoir 20. From the lower part of the ring-shaped resin reservoir 20, as shown in FIGS. 4 and 5, a plurality of molten resin passages 2 for filling are formed.
3 extends downward, and the lower end of the molten resin passage 23 for filling is in contact with the outside of the lower end of the slit 13.
ダイサポート１２の下面には、第２図に示すよ
うにコア４を中心として放射状に溝２４が設けて
あつて、この溝２４には駒２５が嵌合されてい
る。そして駒２５は、アクチユエータ２６の作動
により溝２４に沿つて摺動するようになつてい
る。駒２５のコア４側の端部は、ダイ１１下端の
外周形状に一致していて、駒２５がアクチユエー
タ２６によつて中心側に摺動すると肉付け用溶融
樹脂通路２３の下部を閉じ、駒２５がアクチユエ
ータ２６によつて中心から離れる方法に摺動する
と、肉付け用溶融樹脂通路２３の下部を開くよう
になつている。 As shown in FIG. 2, grooves 24 are provided in the lower surface of the die support 12 radially around the core 4, and a piece 25 is fitted into the groove 24. The piece 25 is adapted to slide along the groove 24 by actuation of an actuator 26. The end of the piece 25 on the core 4 side matches the outer peripheral shape of the lower end of the die 11, and when the piece 25 slides toward the center by the actuator 26, the lower part of the molten resin passage 23 for filling is closed, and the piece 25 When it is slid away from the center by the actuator 26, the lower part of the molten resin passage 23 for filling is opened.
スリツト１３から溶融樹脂を押し出してパリソ
ン１４を成形している際に、パリソン１４を部分
的に厚肉にする必要が生じた場合には、該当箇所
の駒２５をアクチユエータ２６によつて外方に移
動し、同時にアクチユエータ２１を作動させ、溶
融樹脂溜１８内の溶融樹脂をピストン２２によつ
て通路１９の方に押し出すと、駒２５の移動量に
対応した量の溶融樹脂が肉付け用溶融樹脂通路２
３から押し出され、パリソン１４の外側に付着す
る。スリツト１３から押し出された溶融樹脂は大
気圧下に解放されるので膨張し、張力が発生す
る。この張力をもつ膨張過程の溶融樹脂の外側
に、肉付け用溶融樹脂通路２３から押し出された
溶融樹脂が付着すると、双方の溶融樹脂は隙間な
く積層されて一体になり、第１図、第３図に示す
ように厚肉部２７となる。アクチユエータ２６に
よつて駒２５を中心の方に移動し、第４図の右半
分に示すように肉付け用溶融樹脂通路２３の下部
を閉じると、厚肉部２７の成形は終了する。 When molding the parison 14 by extruding molten resin from the slit 13, if it becomes necessary to partially thicken the parison 14, the pieces 25 at the relevant location are moved outward by the actuator 26. When the actuator 21 is actuated and the molten resin in the molten resin reservoir 18 is pushed out toward the passage 19 by the piston 22, an amount of molten resin corresponding to the amount of movement of the piece 25 flows into the molten resin passage for filling. 2
3 and adheres to the outside of the parison 14. The molten resin extruded from the slit 13 is released under atmospheric pressure, so it expands and generates tension. When the molten resin extruded from the filling molten resin passage 23 adheres to the outside of the molten resin in the expansion process with tension, both molten resins are laminated without any gaps and become one body, as shown in FIGS. 1 and 3. This results in a thick portion 27 as shown in FIG. When the actuator 26 moves the piece 25 toward the center and closes the lower part of the molten resin passage 23 for filling as shown in the right half of FIG. 4, the molding of the thick portion 27 is completed.
第６図、第７図は本発明の他の実施例の第４
図、第５図と同様な断面図であつて、前述の実施
例と同一部分には同一符号を付してある。 FIGS. 6 and 7 show a fourth embodiment of the present invention.
This is a cross-sectional view similar to that of FIG.
第６図、第７図に示す実施例においては、ダイ
１１上部の溶融樹脂通路８からの通路２８を介し
てリング状樹脂溜２０に溶融樹脂を導入し、第１
図に示した連結筒１５、肉付け用溶融樹脂押出装
置１６を設けなくてすむようにしたものである。
また駒２５の内方端部の形状はダイ１１の下端内
径に一致させて、駒２５の内方端部がコア４の下
端外周に接するようにし、駒２５を溝２４に沿つ
て外方に移動させると、肉付け用溶融樹脂通路２
３の下部が開いて、スリツト１３のうち駒２５が
移動した分だけスリツト１３が外側に拡げられ、
肉付け用溶融樹脂通路２３から出た溶融樹脂が外
側に合流して一体化し、パリソンの肉付けが行な
われるようにしている。この実施例では、肉付け
用溶融樹脂がスリツト１３内に送り込まれても、
パリソンの他の部分に影響を与えることなく肉付
けして、厚肉にできる効果を発揮する。 In the embodiment shown in FIGS. 6 and 7, the molten resin is introduced into the ring-shaped resin reservoir 20 through the passage 28 from the molten resin passage 8 in the upper part of the die 11.
This eliminates the need to provide the connecting cylinder 15 and the molten resin extrusion device 16 for filling shown in the figure.
The shape of the inner end of the piece 25 is made to match the inner diameter of the lower end of the die 11, so that the inner end of the piece 25 touches the outer circumference of the lower end of the core 4, and the piece 25 is moved outward along the groove 24. When moved, the molten resin passage 2 for filling
The lower part of the slit 13 is opened, and the slit 13 is expanded outward by the amount that the piece 25 of the slit 13 has moved.
The molten resin coming out of the molten resin passage 23 for filling is merged with the outside and integrated, so that the parison is filled. In this embodiment, even if the molten resin for filling is fed into the slit 13,
It has the effect of thickening the parison by adding flesh without affecting other parts of the parison.
駒２５の数は適宜増減することが可能であり、
ダイ１１の外形を規格化することで、ダイサポー
ト１２を交換することで種々の肉付けに適応させ
ることができる。 The number of pieces 25 can be increased or decreased as appropriate,
By standardizing the outer shape of the die 11, it is possible to adapt to various types of filling by replacing the die support 12.
［発明の効果］
本発明は、パリソンの必要な部分に所望の厚さ
で所望の長さの厚肉部分を、簡単に設けることが
でき、パリソンの変形や蛇行も生じないで、すぐ
れた成形を行なうことができる。[Effects of the Invention] The present invention makes it possible to easily provide a thick portion with a desired thickness and desired length in a necessary part of a parison, and to achieve excellent molding without causing deformation or meandering of the parison. can be done.
第１図は本発明の一実施例の縦断面図、第２図
は第１図の−断面図、第３図は第１図の−
断面図、第４図は第１図の要部を示す拡大断面
図、第５図は第４図の−断面図、第６図は本
発明の他の実施例の第４図と同様な拡大断面図、
第７図は第６図の−断面図、第８図は従来装
置の縦断面図、第９図は第８図の−断面図、
第１０図は第８図の−断面図である。
図中、１は本体（成形装置本体）、２はマンド
レル、４はコア、６はリングプランジヤ、８は溶
融樹脂通路、９は押出機、１１はダイ、１２はダ
イサポート、１３はスリツト、１４はパリソン、
１８は溶融樹脂溜、２０はリング状樹脂溜、２３
は肉付け用溶融樹脂通路、２４は溝、２５は駒を
示す。
FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a cross-sectional view of FIG. 1.
4 is an enlarged sectional view showing the main part of FIG. 1, FIG. 5 is a cross-sectional view of FIG. 4, and FIG. 6 is an enlarged view similar to FIG. 4 of another embodiment of the present invention. cross section,
FIG. 7 is a cross-sectional view of FIG. 6, FIG. 8 is a longitudinal cross-sectional view of the conventional device, and FIG. 9 is a cross-sectional view of FIG.
FIG. 10 is a cross-sectional view of FIG. 8. In the figure, 1 is the main body (molding device main body), 2 is the mandrel, 4 is the core, 6 is the ring plunger, 8 is the molten resin passage, 9 is the extruder, 11 is the die, 12 is the die support, 13 is the slit, 14 is parison,
18 is a molten resin reservoir, 20 is a ring-shaped resin reservoir, 23
24 is a groove, and 25 is a piece.
Claims (1)
を有する成形装置本体に、下端にコアを有するマ
ンドレルを昇降可能に挿入し、該マンドレルにリ
ングプランジヤを昇降可能に外嵌せしめて、該リ
ンクプランジヤと成形装置本体との間に溶融樹脂
通路を、また前記コアとダイの間に前記溶融樹脂
通路に連通するスリツトを形成し、前記溶融樹脂
通路に溶融樹脂を押し出す押出機を接続し、前記
ダイとダイサポートとの間にリング状樹脂溜を形
成するとともに、該リング状樹脂溜から放射状に
前記スリツトの下端に連通する肉付け用溶融樹脂
通路を設け、前記ダイサポートに前記リング状樹
脂溜に連通する溶融樹脂溜を形成したうえ、該溶
融樹脂溜を前記押出機に連通させ、前記ダイサポ
ートの下方にコアを中心とする放射状の溝を形成
し、該溝に前記肉付け用溶融樹脂通路を開閉する
駒を摺動自在に嵌合したことを特徴とするブロー
成形装置。1. A mandrel having a core at the lower end is inserted into a molding device main body having a die fixed by a die support at the lower end so as to be movable up and down, and a ring plunger is fitted onto the mandrel so as to be movable up and down. A molten resin passage is formed between the molding apparatus main body and a slit communicating with the molten resin passage is formed between the core and the die, an extruder for extruding the molten resin is connected to the molten resin passage, and a slit communicating with the molten resin passage is formed between the core and the die. A ring-shaped resin reservoir is formed between the ring-shaped resin reservoir and the die support, and a molten resin passage for filling is provided that communicates radially from the ring-shaped resin reservoir to the lower end of the slit, and the die support communicates with the ring-shaped resin reservoir. After forming a molten resin reservoir, the molten resin reservoir is communicated with the extruder, a radial groove centered on the core is formed below the die support, and the molten resin passage for filling is opened and closed in the groove. A blow molding device characterized by pieces that are slidably fitted together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60256188A JPS62116112A (en) | 1985-11-15 | 1985-11-15 | Local thick-wall molding process of parison in blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60256188A JPS62116112A (en) | 1985-11-15 | 1985-11-15 | Local thick-wall molding process of parison in blow molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62116112A JPS62116112A (en) | 1987-05-27 |
| JPH04819B2 true JPH04819B2 (en) | 1992-01-08 |
Family
ID=17289127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60256188A Granted JPS62116112A (en) | 1985-11-15 | 1985-11-15 | Local thick-wall molding process of parison in blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62116112A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5057267A (en) * | 1990-01-10 | 1991-10-15 | Solvay Automotive, Inc. | Apparatus and method for forming hollow parisons of variable wall thickness |
| US5112546A (en) * | 1991-05-10 | 1992-05-12 | Comfort Gordon A | Method of controlling thickness of thermoplastic extruded profile |
| IT1261264B (en) * | 1993-09-16 | 1996-05-09 | Saiag Ind Spa | PROCEDURE AND DEVICE FOR THE PRODUCTION OF CONNECTION PIPES AND RELATED PIPING. |
| JP2986397B2 (en) * | 1995-12-28 | 1999-12-06 | タイガースポリマー株式会社 | Extrusion molding apparatus and parison molding method |
| WO2007098837A1 (en) * | 2006-02-27 | 2007-09-07 | Alpla-Werke Alwin Lehner Gmbh & Co. Kg | Production process for extrusion-blow-moulded plastics bottles and extrusion-blow-moulded plastics bottle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5422465A (en) * | 1977-07-21 | 1979-02-20 | Teraoka Shoichi | Method of molding oneebody mold goods from plural members |
-
1985
- 1985-11-15 JP JP60256188A patent/JPS62116112A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62116112A (en) | 1987-05-27 |
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