JPS5947648B2 - Continuous molding machine for plastic hollow bodies - Google Patents
Continuous molding machine for plastic hollow bodiesInfo
- Publication number
- JPS5947648B2 JPS5947648B2 JP52044652A JP4465277A JPS5947648B2 JP S5947648 B2 JPS5947648 B2 JP S5947648B2 JP 52044652 A JP52044652 A JP 52044652A JP 4465277 A JP4465277 A JP 4465277A JP S5947648 B2 JPS5947648 B2 JP S5947648B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- split mold
- parison
- vertical straight
- arm
- 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
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
- B29C49/28—Blow-moulding apparatus
- B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
- B29C49/36—Blow-moulding apparatus having movable moulds or mould parts rotatable about one axis
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/20—Opening, closing or clamping
- B29C33/26—Opening, closing or clamping by pivotal movement
-
- 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
- B29C49/56—Opening, closing or clamping means
- B29C49/5608—Asymmetric movement of mould parts, e.g. by moving only one mould part
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)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】
この発明は連続的に押出されるプラスチック管(以下パ
リソンと呼ぶ)を1対の割り金型で挾持し、そのパリソ
ンに加圧流体を吹込んで所要の形状に成形するプラスチ
ック中空体の連続成形機に関するものである。[Detailed Description of the Invention] In this invention, a continuously extruded plastic tube (hereinafter referred to as a parison) is held between a pair of split molds, and a pressurized fluid is blown into the parison to form it into a desired shape. This invention relates to a continuous molding machine for plastic hollow bodies.
従来からパリソンを垂直下向に連続供給し、垂直面内を
所定の間隔をあけて回転する複数個の割り金型でこのパ
リソンを順次挾持するとともにこの金型内で上記パリソ
ンを成形してプラスチック1 中空体を連続的に製造で
きるようにした成形機が使用されている。Conventionally, parisons are continuously fed vertically downward, and the parisons are successively clamped by a plurality of split molds that rotate in a vertical plane at predetermined intervals, and the parisons are molded in the molds to form plastic. 1. A molding machine that can continuously manufacture hollow bodies is used.
ところがこの種の成形機は型と型との間の成型されない
パリソンが無駄になり製品の歩留りが悪いという欠点が
あつた。そのため近時、パリソンを挾持する位置附近で
金型を直線、運動させるとともに、互いに近接させ、金
型間に残る無駄なパリソンの量を最小にするようにした
もの、例えば特公昭45−30231号公報等に記載さ
れているものが考えられている。ところがこれらのもの
はその機構の性格上比較的金型の数フ を多くしなけれ
ばならないという欠点に加え金型の大きさ、特に長さが
変つた場合には装置に大きな改造を加えたりしなければ
ならず多種少量生産には不向きであるという問題があつ
た。この発明はこのような事情に着目してなされた5
もので、割り金型の移動および開閉に新規な機構を採用
することにより、金型間で無駄になるパリリンを最少限
にできるのは勿論であり、しかも少数の金型で高生産性
を発揮でき、また金型の寸法が変つても、カムの交換の
みで簡単に対応することができるプラスチツク中空体の
連続成形機を提供するものである。However, this type of molding machine has the disadvantage that the unmolded parison between the molds is wasted, resulting in a poor product yield. Therefore, recently, the molds are moved in a straight line near the position where the parison is held, and the molds are moved close to each other to minimize the amount of wasted parison remaining between the molds, for example, in Japanese Patent Publication No. 45-30231. Those described in official gazettes, etc. are considered. However, these devices have the disadvantage that they require a relatively large number of molds due to the nature of their mechanism, and also require major modifications to the equipment if the size of the mold, especially the length, changes. However, there was a problem in that it was not suitable for high-variety, low-volume production. This invention was made with attention to these circumstances.5
By adopting a new mechanism for moving and opening/closing the split molds, it goes without saying that it is possible to minimize the amount of paryrin wasted between molds, and also achieves high productivity with a small number of molds. To provide a continuous molding machine for plastic hollow bodies, which can easily handle changes in the dimensions of a mold by simply replacing the cam.
以下この発明の1実施例を図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.
駆動軸1を軸心を水平に向けて回転自在に配設し、この
駆動軸1を駆動機構2により所定速度で回転させるよう
にしている。A drive shaft 1 is rotatably disposed with its axis oriented horizontally, and is rotated by a drive mechanism 2 at a predetermined speed.
すなわぢ基体3の両端部にそれぞれ立設した支持台9,
10の上端にそれぞれ中空円筒体状のアダプタ7,8の
基端部を固着している。このアダプタ7,8は先端にそ
れぞれフランジ部を有しており:この両フランジ端面を
所定の間隔をあけて対向させている。また上記アダプタ
7,8は、各中空部の軸心を一致させて水平に配設され
ており、この両中空部に上記駆動軸1を貫挿している。
この駆動軸1はベアリングを介して上記各アダプタ7,
8に回転自在に支持されている。またこの駆動軸1の両
端は上記アダプタ7,8外部に突出しており、この突出
部の一端に鎖車4が固着されており、この鎖車4に上記
基体3上面にそれぞれ配設されたモータ6および減速機
5からなる駆動機構2の動力がチエーン4aにより伝達
されるようになつている。一方固定カム環12を上記回
転軸1の外周囲部を囲むように配設し、この固定カム環
12のさらに外周囲部に環状固定レール13,14を配
設している。すなわち固定カム環12は内径側にカム面
を有する板状のもので、その端面を上記アダプタ8のフ
ランジ先端面にボルトにより着脱自在に取着している。
また固定レール13,14は軸心部が中空になつた円板
状のレール板15,16の端面の外周部に鍔状に形成さ
れたものである。上記レール板15の端面は上記アダプ
タ7の7ランジ先端面に、またレール板16の端面は上
記アダプタ8のフランジ後端面にそれぞれ固着されてい
る。この固定レール13,14はそれぞれ同一形状で上
記レール板15,16の外周端に沿つて形成された外レ
ールとそのや\内側に形成された内レールの2重構造に
なつており、またその軌跡は1部に垂直直線部17を有
し、他の部分は真円である。またこの固定レール13,
14に複数台の台車18をこのレールに沿つて自在に移
動できるように設置している。この台車18は外径側に
金型取付面を有し、内径側の上記固定レール13,14
に対応する部位にそれぞれ車輪支持脚を穿設した断面;
7リリニニ″,特二リャ〒富―奢二それぞれの溝部すな
わち外レールと内レールの間に嵌合し、車輪支持脚の後
部に取着した2対の後輪20で上記固定レール13,1
4のそれぞれの外レールを挟み込むようにしている。In other words, there are support stands 9 erected at both ends of the base 3,
The proximal ends of hollow cylindrical adapters 7 and 8 are fixed to the upper ends of the adapters 10, respectively. Each of the adapters 7 and 8 has a flange portion at its tip; the end surfaces of the flanges are opposed to each other with a predetermined distance therebetween. Further, the adapters 7 and 8 are arranged horizontally with the axes of their respective hollow portions aligned, and the drive shaft 1 is inserted through both hollow portions.
This drive shaft 1 is connected to each of the above-mentioned adapters 7 through bearings.
8 and is rotatably supported. Both ends of the drive shaft 1 protrude outside the adapters 7 and 8, and a chain wheel 4 is fixed to one end of the protrusion, and a motor disposed on the upper surface of the base 3 is connected to the chain wheel 4. 6 and a reduction gear 5, the power of the drive mechanism 2 is transmitted through the chain 4a. On the other hand, a fixed cam ring 12 is disposed so as to surround the outer periphery of the rotating shaft 1, and annular fixed rails 13 and 14 are disposed further on the outer periphery of the fixed cam ring 12. That is, the fixed cam ring 12 is a plate-shaped member having a cam surface on the inner diameter side, and its end surface is detachably attached to the flange end surface of the adapter 8 with bolts.
Further, the fixed rails 13 and 14 are formed in the shape of a brim on the outer periphery of the end surface of disk-shaped rail plates 15 and 16 whose shaft centers are hollow. The end face of the rail plate 15 is fixed to the tip end face of the seven flange of the adapter 7, and the end face of the rail plate 16 is fixed to the rear end face of the flange of the adapter 8, respectively. These fixed rails 13 and 14 have the same shape and have a double structure of an outer rail formed along the outer peripheral edge of the rail plates 15 and 16 and an inner rail formed on the inner side thereof. The locus has a vertical straight portion 17 in one part and is a perfect circle in the other part. In addition, this fixed rail 13,
A plurality of carts 18 are installed at 14 so as to be freely movable along the rails. This trolley 18 has a mold mounting surface on the outer diameter side, and the fixed rails 13, 14 on the inner diameter side.
A cross section with wheel support legs drilled in the corresponding parts;
The fixed rails 13, 1 are fitted with the two pairs of rear wheels 20 attached to the rear portions of the wheel support legs and fitted between the grooves of each of the outer and inner rails.
The outer rails of each of No. 4 are sandwiched between them.
また上記各台車18と上記駆動軸1とをそれぞれアーム
21で連結している。すなわち上記駆動軸1の上記アダ
プタ7,8フランジ先端面間に位置する部分が多角柱状
になつており、一方アーム21の基端には上記多角柱部
の1側面に対応する幅の脚部を有しており、各アーム2
1の基端脚部を上記駆動軸1の多角柱部の各側面に当接
させることにより、このアーム21が駆動軸1の周囲に
放射状に配列するようになつている゛。またこの各アー
ム21の脚部前端と上記駆動軸1の多角柱部の各側面前
端部とをヒンジ22で連結して各アーム21を傾動可能
にしている。またこのアーム21の軸心中空部にアーム
先端部材をスライド自在に鉄挿してこのアーム21が駆
動軸1の略径方向に伸縮できるようにしている。またこ
の各アーム21の先端は上記各台車の内径側底部に回動
自在に軸着されている。また上記アーム21の脚端後部
のアダブタ8側にカムローラ23を回動自在に軸着して
いる。このカムローラ23の外周面は、上記台車18あ
るいはアーム21等の重力により上記固定カム環12の
内側カム面に当接せられ、上記各アームの前方への傾斜
角度を上記カム面の形状に対応したものに規制するよう
にしている。一方上記固定レール13,14の垂直直線
部の外側上方に押出ダイ24を配設し、パリソン25を
上記固定レール13,14の垂直直線部と平行下向に連
続的に供給するようにしている。また上記各台車18上
に割り金型26を着脱自在に取着し、この割り金型26
を台車18に取着した型開閉機構27によつて外径方向
に開閉およびロツクするようにしている。すなわち各台
車18の外径側型取付面に、上記割り金型26の固定型
28を着脱自在に取着している。また台車18側部にブ
ラケツト30をアリ溝により径方向にスライド自在に取
着し、このブラケツト30に型開閉機構27を取着して
いる。型開閉機構27は、ブラケツト30の割り金型2
6側上端部に金型保持腕31の基端部を回動自在に軸着
しており、その先端部に割り金型26の可動型29を保
持しており、この保持腕31が基端部を軸として回動す
ることにより、上記割り金型26が予備的に開閉するよ
うになつている。保 .持腕31の回動はプラケツト下
部にピストンロツドを径方向に向けて取着した開閉シリ
ンダ32の動力が上記保持腕31の基端軸に固着したピ
ニオン33にラツク43によつて伝達されることにより
行なわれる。またブラケツト内径側底板にロツ −ド3
4の基端部を固着し、内径方向に伸びたロツド34先端
にローラ35を回動自在に取着している。またこのロー
ラ35を上記アダプタTのフランジ後端面に固着された
型開閉用カム36のカム溝に嵌合して、上記割わ金型2
6の主開閉を行なうようにしている。また上記金型保持
腕の中央部と上記ブラケツト30の外径側先端部との間
を2つ棒リンク3Tで回動自在に連結するとともに、こ
のリンク31の中央屈曲可能部にロツク用シリンダ38
のピストンロツド先端部を回動自在に連結するとともに
、上記シリンダ38の本体を上記ブラケツト30に回動
自在に取着しており、割り金型26を開じたときに上記
リンク3Tの中央屈曲可能部41をこのシリンダ38で
外径方向に押圧することにより金型のロツクを行うよう
にしている。また上記ロツド3Tの中央部に切欠き39
を設け、上記アダプタTの外周部に固着したロツク用カ
ム39によりロツド37方向に出入するロツク爪40を
型閉時に上記切欠き39に嵌合させることにより上記ブ
ラケツト30のロツクすなわち金型のロツクを行なうよ
うにしている。またこの型開閉機構2Tは上記割り金型
26が上記固定レール13,14の垂直直線部ITにさ
しかゝつた時にこの割ク金型26を閉じるとともにロツ
クして上記パリソン25をこの割り金型26内に封じ込
め、この割り金型内でパリソン25を中空体の製品に吹
込成形した後にこの割り金型26を開くようにしている
。こゝで上記固定レール13,14の垂直直線部11お
よびこれに関連する部分について第T図ないし第10図
を参照してさらに詳しく説明する。第T図は割わ金型2
6と上記垂直直線部17との寸法の関係を示したもので
、図中実線で示した割り金型26Mはこの装置に使用し
得る最大寸法の金型であり、想像線で示した割り金型2
6mは最小寸法の金型である。そしてalは最大割り金
型26Mが上記パリソン25を挾持する位置、A2は最
d橿lり金型26mがパリソン25を挾持する位置を示
し、またbは上記各割り金型26M)26mが垂直直線
部ITを離れ円軌道部に復帰する直前の位置を示してい
る。つまり、上記垂直直線部17は最大割り金型26M
を2台直列させ得る寸法を有している。また、この垂直
直線部ITの上端部42、つまりレール13,14の円
軌道部と垂直直線部ITとの境部分の内側レールを第8
図に示すように内廻りさせて、この上端部42に送り込
まれる台車18の前輪19を、外側レールを挾持する後
輪20よりも内廻りさせ、これによつて上記台車18を
この部分で急速に傾動せしめこの台車18上の割り金型
26の先端部26aとパリソン25とが干渉するのを防
止している。なお、上記後輪20の一方はスライド可能
に取着されており台車18の傾動動作によつて無理が生
じないようにしてあるのは勿論である。そして、一般寸
法の割り金型26、つまり上記最dlリり金型26m以
上で最大割り金型26M未満の寸法を有する金型を装備
する場合には、第9図に示すように上記固定カム環12
の内側カム面の一部に逃げ部44を設け、後述する所定
のタイミングおよび速度でその割り金型26を走行させ
るようにしている。ここで、この装置の作用を説明する
。Further, each of the carts 18 and the drive shaft 1 are connected by arms 21, respectively. That is, the portion of the drive shaft 1 located between the tip surfaces of the flanges of the adapters 7 and 8 is shaped like a polygonal column, while the base end of the arm 21 has a leg portion with a width corresponding to one side of the polygonal column. Each arm has 2
The arms 21 are arranged radially around the drive shaft 1 by bringing the base end legs of the arms 21 into contact with each side surface of the polygonal column of the drive shaft 1. Further, the front end of the leg of each arm 21 and the front end of each side surface of the polygonal column portion of the drive shaft 1 are connected by a hinge 22, so that each arm 21 can be tilted. Further, an arm tip member is slidably inserted into the axial hollow portion of the arm 21 so that the arm 21 can expand and contract in a substantially radial direction of the drive shaft 1. Further, the tip of each arm 21 is rotatably pivoted to the inner diameter side bottom of each of the above-mentioned carts. Further, a cam roller 23 is rotatably attached to the adapter 8 side at the rear of the leg end of the arm 21. The outer peripheral surface of this cam roller 23 is brought into contact with the inner cam surface of the fixed cam ring 12 due to the gravity of the truck 18 or the arm 21, etc., and the forward inclination angle of each arm corresponds to the shape of the cam surface. We are trying to regulate what we have done. On the other hand, an extrusion die 24 is disposed above the outside of the vertical straight portions of the fixed rails 13, 14, so that the parison 25 is continuously fed downward parallel to the vertical straight portions of the fixed rails 13, 14. . Further, a split mold 26 is removably attached to each of the carts 18, and the split mold 26
The mold opening/closing mechanism 27 attached to the carriage 18 opens, closes and locks the mold in the outer diameter direction. That is, the fixed mold 28 of the split mold 26 is removably attached to the outer mold mounting surface of each truck 18. Further, a bracket 30 is attached to the side of the truck 18 by a dovetail groove so as to be slidable in the radial direction, and a mold opening/closing mechanism 27 is attached to this bracket 30. The mold opening/closing mechanism 27 is a split mold 2 of the bracket 30.
The base end of a mold holding arm 31 is rotatably attached to the upper end of the 6 side, and the movable mold 29 of the split mold 26 is held at the tip thereof, and this holding arm 31 is attached to the base end. The split mold 26 is preliminarily opened and closed by rotating around the part. Yasu . The rotation of the holding arm 31 is achieved by transmitting the power of an opening/closing cylinder 32, which is attached to the lower part of the bracket with a piston rod oriented in the radial direction, to a pinion 33 fixed to the base end shaft of the holding arm 31, through a rack 43. It is done. Also, there is a rod 3 on the bottom plate on the inside diameter side of the bracket.
The proximal end of the rod 4 is fixed, and a roller 35 is rotatably attached to the tip of a rod 34 extending in the inner diameter direction. Further, this roller 35 is fitted into a cam groove of a mold opening/closing cam 36 fixed to the rear end surface of the flange of the adapter T, and the split mold 2
6 main opening/closing operations are performed. Further, the center portion of the mold holding arm and the outer diameter side tip portion of the bracket 30 are rotatably connected by a two-bar link 3T, and a locking cylinder 38 is attached to the center bendable portion of the link 31.
The tips of the piston rods are rotatably connected, and the main body of the cylinder 38 is rotatably attached to the bracket 30, so that when the split mold 26 is opened, the center of the link 3T can be bent. By pressing the portion 41 in the outer radial direction with the cylinder 38, the mold is locked. Also, there is a notch 39 in the center of the rod 3T.
A locking cam 39 fixed to the outer circumference of the adapter T causes a locking pawl 40 that moves in and out toward the rod 37 to fit into the notch 39 when the mold is closed, thereby locking the bracket 30, that is, locking the mold. I try to do this. Further, this mold opening/closing mechanism 2T closes and locks the split mold 26 when the split mold 26 reaches the vertical straight portion IT of the fixed rails 13, 14, and moves the parison 25 into the split mold. After the parison 25 is blow-molded into a hollow product within this split mold 26, this split mold 26 is opened. The vertical straight portions 11 of the fixed rails 13, 14 and related portions will now be described in more detail with reference to FIGS. T through 10. Figure T shows split mold 2
6 and the vertical straight portion 17, the split mold 26M indicated by a solid line in the figure is the largest dimension mold that can be used in this device, and the split mold 26M indicated by an imaginary line Type 2
6m is the minimum size mold. And al indicates the position where the largest split mold 26M clamps the parison 25, A2 indicates the position where the largest split mold 26m clamps the parison 25, and b indicates the vertical position of each of the split molds 26M) 26m. It shows the position immediately before leaving the straight section IT and returning to the circular orbit section. In other words, the vertical straight portion 17 is the largest split mold 26M.
It has dimensions that allow two units to be connected in series. In addition, the upper end 42 of this vertical straight portion IT, that is, the inner rail at the boundary between the circular track portion of the rails 13 and 14 and the vertical straight portion IT is
As shown in the figure, the front wheel 19 of the truck 18 that is fed into the upper end portion 42 is rotated inwardly than the rear wheel 20 that grips the outer rail, thereby causing the truck 18 to move rapidly in this portion. This prevents the parison 25 from interfering with the tip 26a of the split mold 26 on the carriage 18. Of course, one of the rear wheels 20 is slidably attached to the rear wheel 20 to prevent strain caused by the tilting movement of the truck 18. When installing a split mold 26 of general dimensions, that is, a mold having dimensions of the maximum DL mold 26m or more and less than the maximum split mold 26M, as shown in FIG. Ring 12
A relief portion 44 is provided on a part of the inner cam surface of the split mold 26 to allow the split mold 26 to run at a predetermined timing and speed, which will be described later. Here, the operation of this device will be explained.
まず、駆動機構2を動作して駆動軸1を所定速度で回転
させれば、固定レール13,14上の各割り金型゜26
は対応する各アーム21にそれぞれ駆動又は規制されて
上記レール13,14上を上記垂直直線部ITにその上
端から送り込まれる方向に走行する。この場合各割り金
型26は円軌道部においては、それぞれ先行する割り金
型に所定の間隔を,あけて等速で走行するものであるが
、垂直直線部17においては特殊な動作を行なう。すな
わち、第9図に示すように、割り金型26が垂直直線部
ITの上端部42に達すると、つまり、図中c位置に達
すると、この割り金型26に対応するアーム21のカム
ローラ23が上記固定カム環12の逃げ部44に達する
。そのためそれ以後は駆動軸1の回転に伴なつて上記ア
ーム21に対する傾動の規制が解除されその割わ金型2
6は自重で傾動動作を行ない、先行する割り金型に急速
に連接される。つまり割り金型26はc位置からa位置
まで速送りされる。そして、このa位置で型開閉機構2
7が作動して上記割り金型26の型閉めを行つてパリソ
ン25を金型26内に封じ込め走行を続けながら上記パ
リソン25を吹込成形によつて中空体の製品に成形し、
製品が冷却硬化した時点で型開きを行なう。なお、上記
割り金型26はa位置からb位置まで一定速度で走行し
て金型上方のバリソン25の伸びあるいは緩みを防止し
、後続の割り金型26がa位置で上方のパリソン25を
挟持するや否やb位置から円軌道部に移行する。この速
度の制御は上記固定カム環12の逃げ部44後半のカム
曲線により設定される。以上のようにして、プラスチツ
ク中空体を連続的に成形することができるわけであるが
、連続的に押し出されるパリソンを金型で隙間なく順次
受け取るようにしているので金型間に残る無駄なバリソ
ンの量を最小にすることができるのは勿論であり、しか
も、パリソン封入時に金型を密に並べる手段として、金
型を速送りによつて先行する金型に連接させるようにし
ているので、従来のもののように多数の金型を予め比較
的密な状態に並べておく必要がなく、したがつて、比較
的高価な金型を大巾に減小させて生産、特に多種小量生
産を経済的に行なうことができるものである。First, if the drive mechanism 2 is operated to rotate the drive shaft 1 at a predetermined speed, each split mold on the fixed rails 13 and 14 ゜26
are respectively driven or regulated by the corresponding arms 21 and travel on the rails 13, 14 in a direction in which they are fed into the vertical straight portion IT from the upper end thereof. In this case, each split mold 26 runs at a constant speed in the circular orbit section with a predetermined distance from the preceding split mold, but performs a special operation in the vertical straight section 17. That is, as shown in FIG. 9, when the split mold 26 reaches the upper end 42 of the vertical straight portion IT, that is, when it reaches the position c in the figure, the cam roller 23 of the arm 21 corresponding to the split mold 26 reaches the relief portion 44 of the fixed cam ring 12. Therefore, from then on, as the drive shaft 1 rotates, the restriction on tilting of the arm 21 is released, and the splitting mold 2
6 performs a tilting operation by its own weight and is rapidly connected to the preceding split mold. In other words, the split mold 26 is rapidly fed from position c to position a. Then, at this position a, the mold opening/closing mechanism 2
7 operates to close the split mold 26, sealing the parison 25 in the mold 26 and molding the parison 25 into a hollow product by blow molding while continuing to run.
The mold is opened when the product has cooled and hardened. The split mold 26 travels at a constant speed from position a to position b to prevent the parison 25 above the mold from elongating or loosening, and the subsequent split mold 26 clamps the parison 25 above at position a. As soon as it does, it shifts from position b to the circular orbit section. This speed control is set by the cam curve of the latter half of the relief portion 44 of the fixed cam ring 12. As described above, hollow plastic bodies can be continuously molded, but since the parisons that are continuously extruded are received one after another by the mold without any gaps, there is no wasted parison remaining between the molds. Of course, the amount of mold can be minimized, and moreover, as a means of closely arranging the molds when enclosing the parison, the molds are connected to the preceding mold by rapid feeding. There is no need to arrange a large number of molds in a relatively dense manner in advance as in the conventional method, and therefore, the number of relatively expensive molds can be greatly reduced, making production, especially high-mix, low-volume production, more economical. It is something that can be done.
さらに、各割り金型26の走行速度を一枚の固定カム環
12により制御するようにしているので構成が簡単で保
守点検等が容易であり、しかも、その割り金型26を異
寸法のものに取り換える場合であつても単に上記固定カ
ム環12を他の形状のものと取り換えるだけでよく、し
たがつて、成形品の段取り換えに際しても手間なく迅速
に対処できるものである。なお、固定カム環の取り付け
手段は前記構成のものに限らず他のものでもよく、要す
るに容易に取替えができるような取付手段ならどのよう
な公知手段を用いてもよい。Furthermore, since the traveling speed of each split mold 26 is controlled by a single fixed cam ring 12, the configuration is simple and maintenance and inspection are easy. Even in the case of replacing the fixed cam ring 12 with one of a different shape, it is sufficient to simply replace the fixed cam ring 12 with one of a different shape, and therefore, it is possible to quickly and easily change the setup of the molded product. Note that the means for attaching the fixed cam ring is not limited to the one having the above-mentioned configuration, but may be any other means, and in short, any known means may be used as long as it is an attaching means that can be easily replaced.
以上詳述したように割り金型の移動および開閉に新規な
機構を採用することにより、金型間で無駄になるパリソ
ンを最小限にできるのは勿論であり、しかも少数の金型
で効率よく運転でき、さらに金型の寸法が変つても、固
定カム環のみを取替えるだけの手間で対応することがで
きるプラスチツク中空体の連続成形機を提供できるもの
である。As detailed above, by adopting a new mechanism for moving and opening/closing the split molds, it goes without saying that the parisons wasted between molds can be minimized, and moreover, it is possible to efficiently use a small number of molds. It is possible to provide a continuous molding machine for plastic hollow bodies that can be operated and can be adapted to changes in the dimensions of a mold by simply replacing the fixed cam ring.
第1図はこの発明の1実施例を示す正面図、第2図は同
実施例における側断面図、第3図は型開閉機構を示す側
面図、第4図は同機構を示す正面図、第5図は第4図に
おけるC−C線断面図、第6図は第4図におけるA矢視
図、第7図ないし第9図は固定レールの垂直直線部の割
り金型の動作を説明するための説明図、第10図は第7
図におけるB−B線矢視図である。
1・・・回転軸、2・・・駆動機構、12・・・固定カ
ム環、13,14・・・固定レール、17・・・垂直直
線部、18・・・台車、21・・・アーム、22・・・
ヒンジ、23・・・ローラ、24・・・押出ダイ、25
・・・パリソン、26・・・割り金型、27・・・型開
閉機構、44・・・逃げ部。FIG. 1 is a front view showing one embodiment of the present invention, FIG. 2 is a side sectional view of the same embodiment, FIG. 3 is a side view showing a mold opening/closing mechanism, and FIG. 4 is a front view showing the same mechanism. Figure 5 is a sectional view taken along the line C-C in Figure 4, Figure 6 is a view taken along arrow A in Figure 4, and Figures 7 to 9 explain the operation of the split mold in the vertical straight section of the fixed rail. Figure 10 is an explanatory diagram for
It is a BB arrow directional view in a figure. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 2... Drive mechanism, 12... Fixed cam ring, 13, 14... Fixed rail, 17... Vertical straight part, 18... Dolly, 21... Arm , 22...
Hinge, 23...Roller, 24...Extrusion die, 25
... Parison, 26... Split mold, 27... Mold opening/closing mechanism, 44... Relief part.
Claims (1)
の固定レールの垂直直線部の外側上方に配設されパリソ
ンを上記垂直直線部と平行下向きに連続的に供給する押
出ダイと、上記固定レールに沿つて移動する複数台の台
車と、この各台車毎に設けられた割り金型およびこの割
り金型を上記固定レールの垂直直線部で閉じて上記パリ
ソンをその割り金型内に封じ込め、吹込成形によつてパ
リソンが中空体の製品に成形されてからその割り金型を
開く型開閉機構と、上記環状固定レールの中心部に配設
され上記各台車を上記レールの垂直直線部分にその上端
から送り込む方向に回転する駆動軸と、この駆動軸の外
周面に等間隔にその各脚部をヒンジにより傾動可能に連
結するとともにその各上端部を対応する上記各台車にそ
れぞれ枢着した複数本の伸縮自在なアームと、この各ア
ームの脚部に回動自在に軸着したカムローラと、上記駆
動軸の外周に同軸的に配設され、その内側カム面で上記
カムローラを支持して上記アームの傾動を規制し上記駆
動軸の駆動力を上記アームを介して上記台車に伝達させ
る固定カム環と、この固定カム環のカム面の一部に設け
られ、上記環状レールの垂直直線部の上端部に達する割
り金型を支持する台車に連結したアームに対する傾動の
規制を解除し、その割り金型をその自重で傾動動作させ
先行する割り金型に急速に連接させる逃げ部とを具備し
てなることを特徴とするプラスチック中空体の連続成形
機。1. An annular fixed rail having a vertical straight portion in part, an extrusion die disposed above the outside of the vertical straight portion of the fixed rail and continuously supplying the parison downward parallel to the vertical straight portion, and the fixed rail. A plurality of carts are moved along the rails, a split mold is provided for each of the carts, and the split mold is closed by the vertical straight section of the fixed rail to confine the parison in the split mold, and the parison is blown into the split mold. A mold opening/closing mechanism that opens the split mold after the parison is formed into a hollow product by molding, and a mold opening/closing mechanism that opens the split mold after the parison is formed into a hollow product, and a mold opening/closing mechanism that is arranged at the center of the annular fixed rail and that connects each of the carts to the vertical straight part of the rail at its upper end. A drive shaft that rotates in the feeding direction, and a plurality of legs whose legs are tiltably connected by hinges at equal intervals on the outer circumferential surface of the drive shaft, and whose upper ends are pivotally connected to each of the corresponding carts. a telescoping arm, a cam roller rotatably attached to the leg of each arm, and a cam roller coaxially disposed around the outer periphery of the drive shaft, supporting the cam roller with its inner cam surface to support the arm. a fixed cam ring that restricts the tilting of the drive shaft and transmits the driving force of the drive shaft to the trolley via the arm; and a fixed cam ring provided on a part of the cam surface of the fixed cam ring, the upper end of the vertical straight part of the annular rail. The mold is equipped with a relief part that releases the restriction on tilting of the arm connected to the cart that supports the split mold that reaches the part, and allows the split mold to tilt by its own weight and rapidly connect to the preceding split mold. A continuous molding machine for plastic hollow bodies.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52044652A JPS5947648B2 (en) | 1977-04-19 | 1977-04-19 | Continuous molding machine for plastic hollow bodies |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52044652A JPS5947648B2 (en) | 1977-04-19 | 1977-04-19 | Continuous molding machine for plastic hollow bodies |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53129255A JPS53129255A (en) | 1978-11-11 |
JPS5947648B2 true JPS5947648B2 (en) | 1984-11-20 |
Family
ID=12697367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52044652A Expired JPS5947648B2 (en) | 1977-04-19 | 1977-04-19 | Continuous molding machine for plastic hollow bodies |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5947648B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2683887T3 (en) * | 2009-03-12 | 2018-09-28 | Graham Engineering Corporation | Rotary blow molding machine with mobile mold clamp assemblies and method |
ES2418152T3 (en) | 2010-03-13 | 2013-08-12 | Graham Packaging Company, L.P. | Machine for blow molding of containers from a preliminary form using a rotating table that rotates continuously |
CN102529065A (en) * | 2012-03-05 | 2012-07-04 | 邓永斌 | One-way rotary extrusion bottle blowing machine with straight track |
CN107199689B (en) * | 2017-08-04 | 2023-02-07 | 台州市祥珑食品容器科技股份有限公司 | Blow molding machine |
CN107297884B (en) * | 2017-08-04 | 2023-04-18 | 台州市祥珑食品容器科技股份有限公司 | Blow mold opening and closing device and blow molding machine |
-
1977
- 1977-04-19 JP JP52044652A patent/JPS5947648B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS53129255A (en) | 1978-11-11 |
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