JPH04371825A - Blow molding - Google Patents
Blow moldingInfo
- Publication number
- JPH04371825A JPH04371825A JP3150524A JP15052491A JPH04371825A JP H04371825 A JPH04371825 A JP H04371825A JP 3150524 A JP3150524 A JP 3150524A JP 15052491 A JP15052491 A JP 15052491A JP H04371825 A JPH04371825 A JP H04371825A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- wires
- deformable assembly
- mold
- resistant tube
- 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.)
- Pending
Links
- 238000000071 blow moulding Methods 0.000 title claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 241001272720 Medialuna californiensis Species 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004804 winding Methods 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
- B29C49/4205—Handling means, e.g. transfer, loading or discharging means
-
- 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
- B29C49/42421—Means for deforming the parison prior to the blowing operation before laying into the mould
- B29C49/42422—Means for deforming the parison prior to the blowing operation before laying into the mould by the preform transporting means
-
- 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
- B29C49/42454—The mould opening plane being vertical
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、ブロー成形方法及び装
置に関し、特に、複数のピース部材よりなる変形自在形
組立体でパリソンを変形させる場合、パリソンの肉厚の
バラツキを防止し、良質な成形品を迅速に成形するため
の新規な改良に関する。[Industrial Application Field] The present invention relates to a blow molding method and apparatus, and in particular, when a parison is deformed using a deformable assembly consisting of a plurality of piece members, it is possible to prevent variations in the wall thickness of the parison and to produce high-quality blow molding. Concerning new improvements for rapidly forming molded articles.
【０００２】0002
【従来の技術】一般に、中空容器などの成形のために、
ブロー成形方法が適用されるが、このブロー成形品の中
には、中空部の軸線が２次元又は３次元に曲折している
ものがある。このような成形品を製造するためには、通
常２つ割りされた金型の、一方の金型内に中空のパリソ
ンを型に沿わせて曲折させて収容する必要がある。１例
として、特開昭６３−２８０６１３号公報には、金型を
開いた状態で、押し出しダイヘッドからパリソンをこれ
ら金型間に押し出すと共に、この押し出しダイヘッドよ
りマルテンサイト変態終了温度以下の低温度において真
っすぐな形状となる弾性を有する形状記憶合金を前記パ
リソン内に垂下供給し、この垂下供給した形状記憶合金
を上記パリソンの熱により逆変態終了温度以上に昇温さ
せ、マルテンサイト変態開始温度であらかじめ記憶させ
た金型キャビティ形状に変形復帰させ、この変形した形
状記憶合金により前記パリソンを金型キャビティ形状に
予備成形した後、金型を合わせて所定の形状にブロー成
形し、この成形中ないし後で前記形状記憶合金が棒状に
変化する前後に金型のキャビティ内から引き抜くように
した方法が開示されている。これにより中空部の軸線が
２次元又は３次元に曲折している成形品を製造すること
ができる。[Prior Art] Generally, for molding hollow containers etc.
A blow molding method is applied, and some of these blow molded products have a hollow part whose axis is bent in two or three dimensions. In order to manufacture such a molded product, it is usually necessary to bend a hollow parison along the mold and store it in one of the two molds. As an example, Japanese Patent Application Laid-Open No. 63-280613 discloses that, with the mold open, a parison is extruded from an extrusion die head between these molds, and the parison is extruded from the extrusion die head at a low temperature below the martensitic transformation end temperature. A shape memory alloy having elasticity that forms a straight shape is supplied in a hanging manner into the parison, and the shape memory alloy supplied in a hanging manner is heated to a temperature higher than the reverse transformation end temperature by the heat of the parison, and is preliminarily heated to the martensitic transformation start temperature. The parison is deformed and returned to the memorized shape of the mold cavity, and the parison is preformed into the shape of the mold cavity using the deformed shape memory alloy, and then the molds are fitted together and blow molded into a predetermined shape, and during or after this molding. discloses a method in which the shape memory alloy is pulled out from the cavity of the mold before and after it changes into a rod shape. Thereby, it is possible to manufacture a molded product in which the axis of the hollow portion is bent two-dimensionally or three-dimensionally.
【０００３】0003
【発明が解決しようとする課題】従来のブロー成形方法
は、以上のように構成されていたため、次のような課題
が存在していた。すなわち、形状記憶合金を利用したブ
ロー成形方法には、曲折した成形品の中から形状記憶合
金を引き抜くことが困難な場合があるという問題点があ
る。例えば、コ字形に曲折している成形品の場合、逆変
態終了温度以上の温度においては形状記憶合金もコ字形
に変形しているので、たとえ弾性を有する形状記憶合金
であっても、中空の空間部が相当大きいものでないと、
成形品から形状記憶合金を引き抜くことは難しい。しか
もマルテンサイト変態終了温度以下の低温度では、形状
記憶合金は真っすぐな形状になるので、引き抜きの際、
成形品を損傷するおそれもある。従って前述の従来方法
によって製造できる成形品は、直線に近いＳ字状、その
ほか簡単な２次元ないし３次元の曲折形状のものに限定
されることになる。また、形状記憶合金の、温度に対す
る変形応答速度は、極めて遅く、このような用途に対し
て満足できるものではなく、成形品の製造効率を上げる
ことが不可能であった。[Problems to be Solved by the Invention] Since the conventional blow molding method was constructed as described above, the following problems existed. That is, the blow molding method using a shape memory alloy has a problem in that it may be difficult to pull out the shape memory alloy from a bent molded product. For example, in the case of a molded product that is bent in a U-shape, the shape memory alloy also deforms into a U-shape at a temperature higher than the reverse transformation end temperature, so even if the shape memory alloy has elasticity, the hollow Unless the space is quite large,
It is difficult to extract shape memory alloys from molded products. Moreover, at low temperatures below the martensitic transformation end temperature, shape memory alloys assume a straight shape, so during drawing,
There is also a risk of damaging the molded product. Therefore, the molded products that can be manufactured by the above-mentioned conventional method are limited to those having a nearly straight S-shape or other simple two-dimensional or three-dimensional curved shapes. Furthermore, the deformation response speed of shape memory alloys to temperature is extremely slow, which is unsatisfactory for such uses, and it has been impossible to increase the production efficiency of molded products.
【０００４】本発明は、以上のような課題を解決するた
めになされたもので、特に、複数のピース部材よりなる
変形自在形組立体でパリソンを変形させる場合、パリソ
ンの肉厚のバラツキを防止し、良質な成形品を迅速に成
形するようにしたブロー成形方法及び装置を提供するこ
とを目的とする。The present invention has been made to solve the above-mentioned problems, and in particular, when a parison is deformed using a deformable assembly consisting of a plurality of piece members, it is possible to prevent variations in the wall thickness of the parison. It is an object of the present invention to provide a blow molding method and apparatus that can quickly mold a high-quality molded product.
【０００５】[0005]
【課題を解決するための手段】本発明によるブロー成形
方法は、耐熱性チューブ内に直列に配設された複数のピ
ース部材を複数のワイヤによって連結し、前期ワイヤを
介して前記各ピース部材の連結状態を変形自在とした変
形自在形組立体を、前記耐熱性チューブと共にパリソン
内に待機させ、その後、前記変形自在形組立体の形状を
曲折させ前記耐熱性チューブを介して前記パリソンを所
定の形状に予備成形し、金型の型閉後、前記パリソン内
に加圧流体を供給して成形品を成形し、前記ワイヤを緩
めて前記変形自在形組立体を前記成形品から除去する方
法である。[Means for Solving the Problems] A blow molding method according to the present invention connects a plurality of piece members arranged in series in a heat-resistant tube with a plurality of wires, and connects each piece member through the wires. A deformable assembly whose connected state can be deformed is made to stand by in the parison together with the heat-resistant tube, and then the shape of the deformable assembly is bent to move the parison into a predetermined position through the heat-resistant tube. the deformable assembly is preformed into a shape, and after the mold is closed, a pressurized fluid is supplied into the parison to form the molded article, and the wire is loosened to remove the deformable assembly from the molded article. be.
【０００６】本発明によるブロー成形装置は、パリソン
を押出すヘッド部材と、前記ヘッド部材の下方に配置さ
れ開閉自在な金型とを有するブロー成形装置において、
前記ヘッド部材の下方に複数のワイヤを介して連結配設
され複数のピース部材よりなる変形自在形組立体と、前
記変形自在形組立体の外周に配設された耐熱性チューブ
と、前記ヘッド部材の上方に設けられ前記ワイヤを上下
動させるための複数のワイヤ駆動体とを備え、前記耐熱
性チューブと共に前記変形自在形組立体を前記パリソン
内に出入自在とした構成である。A blow molding apparatus according to the present invention includes a head member for extruding a parison, and a mold that is disposed below the head member and can be opened and closed.
a deformable assembly including a plurality of piece members connected and disposed below the head member via a plurality of wires; a heat-resistant tube disposed around the outer periphery of the deformable assembly; The deformable assembly is provided with a plurality of wire driving bodies provided above the parison for moving the wires up and down, and the deformable assembly can be moved into and out of the parison together with the heat resistant tube.
【０００７】さらに詳細には、前記ワイヤの長さは互い
に異なるようにした構成である。More specifically, the lengths of the wires are different from each other.
【０００８】[0008]
【作用】本発明によるブロー成形方法及び装置において
は、まず、各ワイヤを緩めた状態で変形自在形組立体及
び耐熱性チューブを直線状として垂直な状態で溶融状態
のパリソン内に挿入して待機させる。その後、各ワイヤ
を上方に引くことにより、各ワイヤの下端に接続した各
ピース部材の姿勢が変わり、所定の２次元又は３次元の
曲折形状となるためパリソンが、同時に変形した耐熱性
チューブを介してこの形に沿って予備成形される。この
場合、各ピース部材間に間隙が形成されるが、耐熱性チ
ューブが外周に位置するため、パリソンはこの間隙内に
入ることはなく、パリソンの壁厚は一定となる。前述の
予備成形されたパリソンを変形自在形組立体及び耐熱性
チューブと共にキャビティ内に配置させ金型の型閉を行
う。その後、パリソン内に加圧流体（空気）を吹き込む
ことにより、パリソンはキャビティの内面に押し付けら
れ、所定形状のブロー成形品となる。次に、各ワイヤを
順々に緩めて各ピース部材を変形自在なレリーズ状態と
し、型開きを行った後、変形自在形組立体及び耐熱性チ
ューブを成形品から抜き取り、成形品を金型から取り出
すことにより、中空部の軸心が２次元又は３次元に曲折
した成形品を高効率で製造することができる。[Operation] In the blow molding method and apparatus according to the present invention, first, with each wire loosened, the deformable assembly and the heat-resistant tube are inserted into a molten parison in a straight and vertical position, and then stand by. let Then, by pulling each wire upward, the posture of each piece member connected to the lower end of each wire changes, and the parison becomes a predetermined two-dimensional or three-dimensional bent shape. It is preformed to follow the shape of the lever. In this case, a gap is formed between each piece member, but since the heat-resistant tube is located on the outer periphery, the parison does not enter this gap, and the wall thickness of the parison remains constant. The preformed parison described above is placed in the cavity together with the deformable assembly and the heat-resistant tube, and the mold is closed. Thereafter, by blowing pressurized fluid (air) into the parison, the parison is pressed against the inner surface of the cavity, resulting in a blow-molded product having a predetermined shape. Next, each wire is loosened one after another to make each piece member into a deformable release state, the mold is opened, and the deformable assembly and heat-resistant tube are extracted from the molded product, and the molded product is removed from the mold. By taking it out, a molded product in which the axis of the hollow portion is bent two-dimensionally or three-dimensionally can be manufactured with high efficiency.
【０００９】[0009]
【実施例】以下、図面と共に本発明によるブロー成形方
法及び装置の好適な実施例について詳細に説明する。図
１から図１２までは本発明によるブロー成形方法及び装
置を示すもので、図１は全体構成の断面図、図２はピー
ス部材の斜視図、図３はピース部材の曲げ状態を示す構
成図、図４、５、６は動作を示す断面図、図７は他の実
施例を示す断面図、図８はワイヤの止め構造を示す断面
図、図９、１０は成形時の要部を示す拡大断面図、図１
１、１２はワイヤ駆動体を示す構成図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the blow molding method and apparatus according to the present invention will be described in detail below with reference to the drawings. 1 to 12 show a blow molding method and apparatus according to the present invention, in which FIG. 1 is a sectional view of the overall configuration, FIG. 2 is a perspective view of a piece member, and FIG. 3 is a configuration diagram showing a bent state of the piece member. , FIGS. 4, 5, and 6 are sectional views showing the operation, FIG. 7 is a sectional view showing another embodiment, FIG. 8 is a sectional view showing the wire stopper structure, and FIGS. 9 and 10 show the main parts during molding. Enlarged cross-sectional view, Figure 1
1 and 12 are configuration diagrams showing wire driving bodies.
【００１０】まず、図１において、中空成形機５０のパ
リソン２０を押出すヘッド部２２の中心穴には、スリー
ブ１２が固定されており、このスリーブ１２の下方位置
には、複数のワイヤ８ａ、８ｂで吊下げられた状態の変
形自在形組立体Ａが配置されている。この変形自在形組
立体Ａは、図２に示すように複数のコマ状をなすピース
部材２・４・６及び各ピース部材２、４、６を貫通する
複数の前記ワイヤ８ａ・８ｂより構成されていると共に
、この変形自在形組立体Ａの外周には、耐熱性シリコン
等からなる耐熱性チューブ６０が設けられている。First, in FIG. 1, a sleeve 12 is fixed to the center hole of the head section 22 of the blow molding machine 50 for extruding the parison 20, and below the sleeve 12, a plurality of wires 8a, The deformable assembly A is arranged in a suspended state at 8b. As shown in FIG. 2, this deformable assembly A is composed of a plurality of piece members 2, 4, and 6 in the shape of pieces and a plurality of wires 8a and 8b passing through each piece member 2, 4, and 6. At the same time, a heat-resistant tube 60 made of heat-resistant silicone or the like is provided around the outer periphery of the deformable assembly A.
【００１１】前記ピース部材２、４、６は各々長さが異
なるワイヤ８ａ、８ｂに接続されている。前記スリーブ
１２は、パリソン２０の内径よりも小さい外径を有する
円筒状をしており、このスリーブ１２の下側半分は前記
変形自在形組立体Ａの外径よりも大きい内径に形成され
ていると共に、残りの半分の長さにわたって設けられた
貫通穴１２ａは、変形自在形組立体Ａのワイヤ８ａ及び
８ｂの移動を妨げない内径に形成されており、図示しな
い加圧流体を吹込むための空気吹込み装置と連通してい
る。The piece members 2, 4 and 6 are connected to wires 8a and 8b having different lengths, respectively. The sleeve 12 has a cylindrical shape with an outer diameter smaller than the inner diameter of the parison 20, and the lower half of the sleeve 12 has an inner diameter larger than the outer diameter of the deformable assembly A. At the same time, the through hole 12a provided over the remaining half length is formed with an inner diameter that does not impede movement of the wires 8a and 8b of the deformable assembly A, and has an air blower (not shown) for blowing pressurized fluid. It communicates with the embedding device.
【００１２】前記ヘッド部２２の上部には、中空部２４
ａを有する可動部材２４が配置されており、このヘッド
部２２には、図示しない射出装置が接続されるようにな
っており、前述のようにスリーブ１２の外径よりも大き
い円筒状のパリソン２０を押出し可能に構成されている
。[0012] A hollow part 24 is provided in the upper part of the head part 22.
A movable member 24 having a diameter a is arranged, and an injection device (not shown) is connected to this head portion 22, and as described above, a cylindrical parison 20 larger than the outer diameter of the sleeve 12 is disposed. It is configured so that it can be extruded.
【００１３】前記可動部材２４の中空部２４ａにはスリ
ーブ１２の一部が収容されるようになっている。この可
動部材２４には、８個（図中には２個のみ開示）のガイ
ドロール１４が回転可能に指示されており、更にワイヤ
８ａ、８ｂ‥‥駆動用の８個の流体圧シリンダからなる
ワイヤ駆動体１６ａから１６ｈ（図１１、１２に開示）
が取り付けられている。A portion of the sleeve 12 is accommodated in the hollow portion 24a of the movable member 24. Eight guide rolls 14 (only two are shown in the figure) are rotatably arranged on the movable member 24, and are further comprised of eight fluid pressure cylinders for driving wires 8a, 8b. Wire drive bodies 16a to 16h (disclosed in FIGS. 11 and 12)
is installed.
【００１４】前記各ワイヤ８ａ、８ｂ‥‥は、スリーブ
１２の貫通穴１２ａを通りガイドロール１４を介して各
ワイヤ駆動体１６ａ〜１６ｈのロッドにそれぞれ取り付
けられており、各ワイヤ駆動体１６ａ〜１６ｈは、ワイ
ヤ８ａ、８ｂ‥‥を上下移動できるものである。Each of the wires 8a, 8b... passes through the through hole 12a of the sleeve 12 and is attached to the rod of each of the wire driving bodies 16a to 16h via the guide roll 14. The wires 8a, 8b, . . . can be moved up and down.
【００１５】前記ヘッド部２２の両側面には、流体圧シ
リンダからなる複数の駆動体１８が取り付けられており
、各駆動体１８のロッド１８ａは前記可動部材２４に連
結されている。これらの駆動体１８は、可動部材２４を
図中上下方向に移動可能であり、このヘッド部２２の下
方位置には金型２６が配置されていると共に、この金型
２６は一組の型開閉シリンダ２８によって左右方向に開
閉できるように構成されている。A plurality of drive bodies 18 made of fluid pressure cylinders are attached to both sides of the head portion 22, and a rod 18a of each drive body 18 is connected to the movable member 24. These driving bodies 18 are capable of moving a movable member 24 in the vertical direction in the figure, and a mold 26 is disposed below the head portion 22, and this mold 26 can be opened and closed by a set of molds. It is configured so that it can be opened and closed in the left-right direction by a cylinder 28.
【００１６】次に、図２及び図３に前記変形自在形組立
体Ａ及び耐熱性チューブ６０の一部を簡略化して示す。
ほぼ円柱状に形成されたピース部材２、４及び６には、
軸心と平行にそれぞれ複数の貫通穴２ａ、４ａ、６ａが
設けられている。Next, FIGS. 2 and 3 show a portion of the deformable assembly A and the heat-resistant tube 60 in a simplified manner. The piece members 2, 4, and 6 each having a substantially cylindrical shape include:
A plurality of through holes 2a, 4a, and 6a are provided parallel to the axis, respectively.
【００１７】前記各ピース部材２、４及び６の各貫通穴
２ａ、４ａ、６ａにワイヤ８ａ、８ｂ‥‥が貫通してお
り、この場合、８本（２本のみ図示）のワイヤ８ａ、８
ｂ‥‥は、各々長さが順次異なるように構成され、スト
ッパ１０を介して当該ピース部材２、４、６に接続され
ている。従って、この各ワイヤの長さは、本実施例では
２本しか示していないが、図１１、１２に示すように８
個のワイヤ駆動体１６ａ〜１６ｈに接続された各ワイヤ
８ａ、８ｂ‥‥の長さは、順次異なるように構成され、
各ワイヤ８ａ、８ｂ‥‥が各々８個のピース部材２、４
、６‥‥（図１１、１２に示す）に個別に接続されてい
る。Wires 8a, 8b... penetrate through the through holes 2a, 4a, 6a of each of the piece members 2, 4, and 6, and in this case, eight (only two are shown) wires 8a, 8
b... are configured to have sequentially different lengths, and are connected to the piece members 2, 4, and 6 via stoppers 10. Therefore, although only two wires are shown in this embodiment, the length of each wire is 8 as shown in FIGS. 11 and 12.
The lengths of the wires 8a, 8b connected to the wire driving bodies 16a to 16h are configured to be different in sequence,
Each wire 8a, 8b... has eight piece members 2, 4, respectively.
, 6... (shown in FIGS. 11 and 12).
【００１８】前記各ピース部材２、４、６‥‥は８個で
構成されているが、そのうちの３個についてその構成を
示すと、図２、３に示すように、ピース部材２の中間の
ピース部材４と隣り合う側の端部には、長方形の凸部２
ｃが設けられており、この中間のピース部材４には、下
側の一端部に前記凸部２ｃとはめ合わされるみぞ部４ｃ
が設けられ、これの上側の他端部に半月キー状の凸部４
ｄが設けられている。また、最上段のピース部材６の、
前記ピース部材４と隣り合う下側の端部には前記凸部４
ｄとはめ合わされるみぞ部６ｃが設けられている。Each of the piece members 2, 4, 6, etc. is composed of eight pieces, and the structure of three of them is shown in FIGS. 2 and 3, as shown in FIGS. A rectangular convex portion 2 is provided at the end adjacent to the piece member 4.
c is provided, and this intermediate piece member 4 has a groove portion 4c fitted to the convex portion 2c at one end of the lower side.
is provided, and a half-moon key-shaped convex portion 4 is provided on the other end of the upper side of the convex portion 4.
d is provided. In addition, the piece member 6 at the top tier,
The convex portion 4 is provided at the lower end adjacent to the piece member 4.
A groove portion 6c is provided to be fitted with the groove portion d.
【００１９】前記ピース部材６の底部には、斜めに切り
欠かれた傾斜底面６ｄが設けられており、この傾斜底面
６ｄは、貫通穴６ａが通るような関係位置に配置されて
いる。その上段のピース部材６の上端部には長方形状の
凸部６ｅが設けられており、これらの凸部２ｃ、４ｄ及
び６ｅと、みぞ部４ｃ及び６ｃとな、いずれも長手方向
の軸心が貫通穴２ａ、４ａ、６ａの軸心と直交するよう
に設けられている。なお、図２では３個のピース部材２
、４、６のみ示しているが、実際には、図１、１１、１
２に示すように、８個のピース部材を採用しているもの
である。[0019] The bottom of the piece member 6 is provided with an inclined bottom surface 6d which is cut out diagonally, and this inclined bottom surface 6d is arranged at a position such that the through hole 6a passes therethrough. A rectangular convex portion 6e is provided at the upper end of the upper piece member 6, and these convex portions 2c, 4d, and 6e and the groove portions 4c and 6c all have longitudinal axes. It is provided so as to be perpendicular to the axes of the through holes 2a, 4a, and 6a. In addition, in FIG. 2, three piece members 2
, 4, and 6 are shown, but in reality, Figures 1, 11, and 1 are shown.
As shown in Figure 2, eight piece members are used.
【００２０】従って、この８本のワイヤ８ａ、８ｂ‥‥
が個別に異なる長さで各々個別に接続された各ピース部
材２、４、６‥‥を用いて、各ピース部材２、４、６‥
‥を自在に変形させる場合、図１１に示すように、各ワ
イヤ８ａ、８ｂ‥‥を緩めると各ピース部材２、４、６
‥‥は直線状であるが、各ワイヤ駆動体１６ａから１６
ｈを介して各ワイヤ８ａ、８ｂ‥‥をいちばん短いワイ
ヤから順に上方に引くと、各ピース部材２、４、６‥‥
は、ストッパ１０を起点として各ワイヤ８ａ、８ｂ‥‥
が引かれるため、図３、１０で示すように、上段のピー
ス部材６の下側の傾斜底面６ｄは中間のピース部材４の
上面と接触することになり、変形自在形組立体Ａを所定
の形状に曲折させることができる。この場合、前述の凸
部２ｃ、みぞ部４ｃなどの各はめ合わせ部は、各ピース
部材２、４、６相互の心ずれを防止したり、曲折する方
向を案内する。すなわち、パリソン２０内でこのような
曲折を行わせることによりパリソン２０を所定の形状に
予備成形することができるもので、各々長さが異なる各
ワイヤ８ａ、８ｂ‥‥を接続する各ピース部材２、４、
６‥‥を任意に選択することにより、任意の曲折形状を
得ることができる。なお、前記ワイヤ８ａ、８ｂ‥‥と
各ピース部材２、４、６‥‥との接続構造は、前述のス
トッパ１０に限らず、例えば、図８に示すように、ワイ
ヤ８ａ、８ｂ‥‥に接続した端子４０をピース部材２、
４、６‥‥のねじ孔４１に螺合することも可能である。[0020] Therefore, these eight wires 8a, 8b...
Using the piece members 2, 4, 6, which are individually connected with different lengths, each piece member 2, 4, 6...
When freely deforming..., as shown in FIG. 11, when each wire 8a, 8b... is loosened, each piece member 2, 4, 6
. . . is a straight line, but each wire driving body 16a to 16
When each wire 8a, 8b... is pulled upward in order from the shortest wire through h, each piece member 2, 4, 6...
Each wire 8a, 8b starts from the stopper 10.
3 and 10, the lower inclined bottom surface 6d of the upper piece member 6 comes into contact with the upper surface of the intermediate piece member 4, and the deformable assembly A is moved to a predetermined position. Can be bent into shape. In this case, each fitting portion such as the above-mentioned convex portion 2c and groove portion 4c prevents the piece members 2, 4, and 6 from being misaligned with each other, and guides the bending direction. That is, by making such bends within the parison 20, the parison 20 can be preformed into a predetermined shape, and each piece member 2 connecting the wires 8a, 8b, each having a different length, ,4,
By arbitrarily selecting 6..., any bent shape can be obtained. Note that the connection structure between the wires 8a, 8b... and each piece member 2, 4, 6... is not limited to the stopper 10 described above; for example, as shown in FIG. 8, the connection structure between the wires 8a, 8b... The connected terminal 40 is connected to the piece member 2,
It is also possible to screw into the screw holes 41 of No. 4, 6, and so on.
【００２１】次に、本発明における第１実施例の作用を
説明する。あらかじめ、駆動体１８を駆動して可動部材
２４をヘッド部２２に密着させ、型開閉シリンダ２８を
駆動して金型２６を開き、各ワイヤ駆動体１６ａから１
６ｈを駆動して変形自在形組立体Ａをほぼ直線状に下垂
させておく。図示しない射出装置より溶融樹脂を供給し
てパリソン２０を変形自在形組立体Ａと耐熱性チューブ
６０の外径部に円筒状に下垂させる（図１）。Next, the operation of the first embodiment of the present invention will be explained. In advance, the driver 18 is driven to bring the movable member 24 into close contact with the head portion 22, the mold opening/closing cylinder 28 is driven to open the mold 26, and one wire is removed from each wire driver 16a.
6h is driven to make the deformable assembly A hang down in a substantially straight line. A molten resin is supplied from an injection device (not shown) to make the parison 20 hang down in a cylindrical shape over the outer diameter portions of the deformable assembly A and the heat-resistant tube 60 (FIG. 1).
【００２２】次に、各ワイヤ駆動体１６ａ〜１６ｈを作
動させて各ワイヤ８ａ、８ｂ‥‥をいちばん短いものか
ら順に上方に引き上げることにより、変形自在形組立体
Ａは所定の形状に曲折し、パリソン２０は図４に示すよ
うな所要の曲折形状に予備成形される。このとき、各ピ
ース部材２、４、６‥‥間に形成される間隙Ｄは、耐熱
性チューブ６０によってその周面が覆われているため、
パリソン２０がこの間隙Ｄ内に入り込むことはなく、そ
の結果、パリソン２０の肉厚は常に一定に保たれる。Next, the deformable assembly A is bent into a predetermined shape by activating each of the wire driving bodies 16a to 16h to pull up each wire 8a, 8b, etc. upward in order from the shortest one to the top. The parison 20 is preformed into a desired bent shape as shown in FIG. At this time, since the circumferential surface of the gap D formed between each piece member 2, 4, 6 is covered by the heat-resistant tube 60,
The parison 20 does not enter into this gap D, and as a result, the wall thickness of the parison 20 is always kept constant.
【００２３】次に型開閉シリンダ２８を駆動して金型２
６を閉じ、パリソン２０を変形自在形組立体Ａと共にキ
ャビティ３０内に配置させ、図示しない空気吹込み装置
から空気を供給して中空状の成形品Ｂを成形する（図５
）。Next, the mold opening/closing cylinder 28 is driven to open the mold 2.
6 is closed, the parison 20 is placed in the cavity 30 together with the deformable assembly A, and air is supplied from an air blowing device (not shown) to form a hollow molded product B (Fig. 5
).
【００２４】次に、型開閉シリンダ２８を駆動して金型
２６を開く一方、各ワイヤ駆動体１６ａ〜１６ｈを駆動
して各ワイヤ８ａ、８ｂ‥‥を緩め、変形自在形組立体
Ａを自由に変形可能なレリーズ状態（直線状）とさせ、
駆動体１８を駆動して可動部材２４を図６のように上方
に移動させ、変形自在形組立体Ａをスリーブ１２内に収
容する。これにより、成形品Ｂは図中下方に落下可能と
なる（図６）。Next, the mold opening/closing cylinder 28 is driven to open the mold 26, while the wire driving bodies 16a to 16h are driven to loosen the wires 8a, 8b, etc., and the deformable assembly A is freed. The release state is deformable (linear),
The movable member 24 is moved upward as shown in FIG. 6 by driving the driver 18, and the deformable assembly A is accommodated in the sleeve 12. This allows the molded product B to fall downward in the figure (FIG. 6).
【００２５】前述の工程を繰返すことにより、軸心が２
次元に曲折した中空状の成形品Ｂを連続的に製造するこ
とができる。なお、前述の説明では、傾斜底面６ｄは１
個所に設けられているだけの場合のため、曲折は２次元
状のものとなるが、互いに傾斜底面６ｄの向きの異なる
複数の傾斜底面６ｄを組み合わせることにより、曲折を
３次元状のものとすることができる。[0025] By repeating the above steps, the axis center is 2
It is possible to continuously manufacture a hollow molded product B that is bent in a dimension. In addition, in the above explanation, the inclined bottom surface 6d is 1
Since the bends are only provided at certain locations, the bends will be two-dimensional. However, by combining a plurality of inclined bottom surfaces 6d with different directions of the inclined bottom surfaces 6d, the bends will be three-dimensional. be able to.
【００２６】また、ワイヤ８ａ、８ｂ‥‥の数も８本以
上として、より複雑な３次元の曲折形状のものを形成さ
せることができると共に、各ワイヤ駆動体１６ａ〜１６
ｈを図１の取付位置から互いにロッドが下向きとなるよ
うに９０度ずらして、シリンダ軸心をワイヤ８ａ、８ｂ
‥‥の軸心と一致させるように取り付ければ、ガイドロ
ーラ１４を省略することが可能である。Furthermore, by setting the number of wires 8a, 8b, .
h by 90 degrees from the mounting position shown in Figure 1 so that the rods are facing downward, and align the cylinder axes with the wires 8a and 8b.
The guide roller 14 can be omitted if it is attached so as to match the axes of the rollers.
【００２７】また、ワイヤ８ａ、８ｂ‥‥を駆動するワ
イヤ駆動体１６ａから１６ｈとして流体圧シリンダを用
いたが、例えば、ウィンチ式の巻き取り装置を採用する
こともでき、同様に駆動体１８は、リニアモータなどの
直線駆動装置によって置き換えることが可能であると共
に、各ワイヤ８ａ、８ｂ‥‥は等長とした場合も可能で
あることは述べるまでもないことである。Further, although fluid pressure cylinders are used as the wire drive bodies 16a to 16h for driving the wires 8a, 8b, etc., for example, a winch type winding device may also be adopted; Needless to say, the wires 8a, 8b, . . . can be replaced with a linear drive device such as a linear motor, and the wires 8a, 8b, . . . can also be of equal length.
【００２８】図７は本発明をアキュムレータヘッドを有
する形式の中空成形機に適用した第２実施例を示してい
る。すなわち、前記ヘッド部２２の代りに設けられたア
キュムレータヘッド３２の上部には、可動板３４が配置
されており、アキュムレータヘッド３２は可動板３４を
貫通して図中上方に突出している。前記可動板３４には
、一対のブラケット３６が固定されており、このブラケ
ット３６上にガイドロール１４がそれぞれ回転可能に指
示されると共に、ワイヤ駆動体１６ａ、１６ｂ‥‥が取
り付けられている。FIG. 7 shows a second embodiment in which the present invention is applied to a blow molding machine having an accumulator head. That is, a movable plate 34 is disposed above an accumulator head 32 provided in place of the head portion 22, and the accumulator head 32 passes through the movable plate 34 and projects upward in the figure. A pair of brackets 36 are fixed to the movable plate 34, and the guide rolls 14 are rotatably indicated on the brackets 36, and wire driving bodies 16a, 16b, . . . are attached.
【００２９】また、アキュムレータヘッド３２には、そ
の中心部に貫通穴３２ａが設けられており、図示しない
空気吹込み装置と連通しており、アキュムレータヘッド
３２の下端部には、変形自在形組立体Ａが配置されてい
る。また、ワイヤ８ａ、８ｂ‥‥は貫通穴３２ａを経て
ガイドロール１４に巻き付けられ、各ワイヤ駆動体１６
ａ、１６ｂ‥‥のロッドにそれぞれ連結されている。Further, the accumulator head 32 is provided with a through hole 32a in its center, which communicates with an air blowing device (not shown), and a deformable assembly is provided at the lower end of the accumulator head 32. A is placed. Further, the wires 8a, 8b... are wound around the guide roll 14 through the through hole 32a, and each wire drive body 16
They are connected to rods a, 16b, . . . , respectively.
【００３０】この第２実施例の作動は、前述の第１実施
例におけるスリーブ１２に相当する部材がなく、変形自
在形組立体Ａがアキュムレータヘッド３２内に収容され
るようになっていること及び駆動体１８によって可動板
３４が移動するようになっていることを除けば、第１実
施例のものと同様であるため、その動作説明は省略する
。なお、本実施例においては、変形自在形組立体Ａを耐
熱性チューブ６０と共にパリソン２０内に待機させる方
法について述べたが、この方法に限らず、パリソンの中
に変形自在形組立体Ａが耐熱性チューブ６０と共に後か
ら挿入されるようにした場合も同じ作用効果を得ること
ができる。The operation of this second embodiment is such that there is no member corresponding to the sleeve 12 in the first embodiment, and the deformable assembly A is housed within the accumulator head 32. Since it is the same as that of the first embodiment except that the movable plate 34 is moved by the driving body 18, a description of its operation will be omitted. In this embodiment, a method has been described in which the deformable assembly A is placed on standby in the parison 20 together with the heat-resistant tube 60. However, the present invention is not limited to this method. The same effect can be obtained even if it is inserted later together with the sex tube 60.
【００３１】[0031]
【発明の効果】本発明によるブロー成形方法及び装置は
、以上のように構成されているため、次のような効果を
得ることができる。すなわち、パリソン内に配設した変
形自在形組立体及び耐熱性チューブの各ピース部材を各
ワイヤで個別に引くことにより２次元又は３次元の曲折
形状を任意に作ることができ、同時に、この耐熱性チュ
ーブによって変形自在形組立体の外周が覆われているた
め、各ピース部材間の隙間にパリソンが侵入することが
なく、肉厚にバラツキのない中空部の軸線が複雑に曲が
りくねった中空の成形品を製造することができ、また、
できあがった成形品を取り出す場合に内部を傷付けるよ
うなおそれがない。さらに、成形された成形品内から変
形自在形組立体を敏速に取り出すことができるので、生
産能率を大幅に向上させることができる。Effects of the Invention Since the blow molding method and apparatus according to the present invention are constructed as described above, the following effects can be obtained. In other words, by individually pulling each piece member of the deformable assembly and heat-resistant tube arranged in the parison with each wire, it is possible to create any two-dimensional or three-dimensional bent shape, and at the same time, the heat-resistant Since the outer periphery of the deformable assembly is covered with a flexible tube, the parison does not enter into the gaps between each piece, and the axis of the hollow part has a complex bend with no variation in wall thickness. can manufacture products, and also
There is no risk of damaging the inside when removing the finished molded product. Furthermore, since the deformable assembly can be quickly removed from the molded article, production efficiency can be greatly improved.
【図１】本発明によるブロー成形装置を示す断面図であ
る。FIG. 1 is a sectional view showing a blow molding apparatus according to the present invention.
【図２】図１の要部を示す拡大分解斜視図である。FIG. 2 is an enlarged exploded perspective view showing the main parts of FIG. 1;
【図３】図１の要部の動作を示す構成図である。FIG. 3 is a configuration diagram showing the operation of main parts in FIG. 1;
【図４】図１の動作状態を示す断面図である。FIG. 4 is a sectional view showing the operating state of FIG. 1;
【図５】図１の動作状態を示す断面図である。FIG. 5 is a sectional view showing the operating state of FIG. 1;
【図６】図１の動作状態を示す断面図である。FIG. 6 is a cross-sectional view showing the operating state of FIG. 1;
【図７】図１の他の実施例を示す断面図である。FIG. 7 is a sectional view showing another embodiment of FIG. 1;
【図８】ワイヤの固定構造を示す断面図である。FIG. 8 is a sectional view showing a wire fixing structure.
【図９】成形時の要部を示す拡大断面図である。FIG. 9 is an enlarged sectional view showing main parts during molding.
【図１０】成形時の要部を示す拡大断面図である。FIG. 10 is an enlarged sectional view showing main parts during molding.
【図１１】駆動体と変形自在形組立体を示す構成図であ
る。FIG. 11 is a configuration diagram showing a driver and a deformable assembly.
【図１２】駆動体と変形自在形組立体を示す構成図であ
る。FIG. 12 is a configuration diagram showing a driver and a deformable assembly.
２ ピース部材 ４ ピース部材 ６ ピース部材 ６ｄ 傾斜底面 Ａ 変形自在形組立体 Ｂ 成形品 ８ａ ワイヤ ８ｂ ワイヤ １６ａ ワイヤ駆動体 １６ｈ ワイヤ駆動体 ２０ パリソン ２２ ヘッド部材 ２６ 金型 ３０ キャビティ ６０ 耐熱性チューブ 2 Piece member 4 Piece member 6 Piece member 6d Slanted bottom surface A Deformable assembly B Molded product 8a Wire 8b wire 16a Wire drive body 16h Wire drive body 20 Parison 22 Head member 26 Mold 30 Cavity 60 Heat resistant tube
Claims (3)
設された複数のピース部材（２、４、６）を複数のワイ
ヤ（８ａ、８ｂ）によって連結し、前記ワイヤ（８ａ、
８ｂ）を介して前記各ピース部材（２、４、６）の連結
状態を変形自在とした変形自在形組立体（Ａ）を、前記
耐熱性チューブ（６０）と共にパリソン（２０）内に位
置させ、その後、前記変形自在形組立体（Ａ）の形状を
曲折させ前記耐熱性チューブ（６０）を介して前記パリ
ソン（２０）を所定の形状に予備成形し、金型（２６）
の型閉後、前記パリソン（２０）内に加圧流体を供給し
て成形品（Ｂ）を成形し、前記ワイヤ（８ａ、８ｂ）を
緩めて前記変形自在形組立体（Ａ）を前記成形品（Ｂ）
から除去することを特徴とするブロー成形方法。1. A plurality of piece members (2, 4, 6) arranged in series in a heat-resistant tube (60) are connected by a plurality of wires (8a, 8b), and the wires (8a,
A deformable assembly (A) in which the connected state of each piece member (2, 4, 6) can be freely changed via the heat-resistant tube (60) is positioned in the parison (20). Then, the parison (20) is preformed into a predetermined shape by bending the shape of the deformable assembly (A) through the heat-resistant tube (60), and then molded into a mold (26).
After the mold is closed, pressurized fluid is supplied into the parison (20) to form the molded product (B), and the wires (8a, 8b) are loosened to transform the deformable assembly (A) into the molded product. Product (B)
A blow molding method characterized by removing from.
（２２）と、前記ヘッド部材（２２）の下方に配置され
開閉自在な金型（２６）とを有するブロー成形装置にお
いて、前記ヘッド部材（２２）の下方に複数のワイヤ（
８ａ、８ｂ）を介して連結配設され複数のピース部材（
２、４、６）よりなる変形自在形組立体（Ａ）と、前記
変形自在形組立体（Ａ）の外周に配設された耐熱性チュ
ーブ（６０）と、前記ヘッド部材（２２）の上方に設け
られ前記ワイヤ（８ａ、８ｂ）を上下動させるための複
数のワイヤ駆動体（１６ａ〜１６ｈ）とを備え、前記耐
熱性チューブ（６０）と共に前記変形自在形組立体（Ａ
）を前記パリソン（２０）内に出入自在としたことを特
徴とするブロー成形装置。2. A blow molding apparatus comprising a head member (22) for extruding a parison (20), and a mold (26) disposed below the head member (22) that can be opened and closed, wherein the head member ( 22) There are multiple wires (
A plurality of piece members (
2, 4, and 6), a heat-resistant tube (60) disposed on the outer periphery of the deformable assembly (A), and an upper part of the head member (22). a plurality of wire drive bodies (16a to 16h) provided in the deformable assembly (A
) can be freely moved in and out of the parison (20).
互いに異なることを特徴とする請求項２記載のブロー成
形装置。3. The blow molding apparatus according to claim 2, wherein the lengths of each of the wires (8a, 8b) are different from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3150524A JPH04371825A (en) | 1991-06-21 | 1991-06-21 | Blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3150524A JPH04371825A (en) | 1991-06-21 | 1991-06-21 | Blow molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04371825A true JPH04371825A (en) | 1992-12-24 |
Family
ID=15498752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3150524A Pending JPH04371825A (en) | 1991-06-21 | 1991-06-21 | Blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04371825A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10347924A1 (en) * | 2003-10-15 | 2005-05-19 | Daimlerchrysler Ag | Mould for a blow mould installation, comprises an extruder nozzle, a blow mould tool, a blowing unit, and a releasable connection element |
| JP2006192908A (en) * | 2006-03-29 | 2006-07-27 | Aitec:Kk | Blow molding method |
| DE102007031876A1 (en) * | 2007-07-09 | 2009-01-15 | Röchling Automotive AG & Co. KG | Extrusion blowing device for producing hollow bodies, particularly plastic bottles, has material extrusion nozzle, which is formed for extruding hollow perform |
-
1991
- 1991-06-21 JP JP3150524A patent/JPH04371825A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10347924A1 (en) * | 2003-10-15 | 2005-05-19 | Daimlerchrysler Ag | Mould for a blow mould installation, comprises an extruder nozzle, a blow mould tool, a blowing unit, and a releasable connection element |
| JP2006192908A (en) * | 2006-03-29 | 2006-07-27 | Aitec:Kk | Blow molding method |
| DE102007031876A1 (en) * | 2007-07-09 | 2009-01-15 | Röchling Automotive AG & Co. KG | Extrusion blowing device for producing hollow bodies, particularly plastic bottles, has material extrusion nozzle, which is formed for extruding hollow perform |
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