JPH0366141B2 - - Google Patents
Info
- Publication number
- JPH0366141B2 JPH0366141B2 JP58054508A JP5450883A JPH0366141B2 JP H0366141 B2 JPH0366141 B2 JP H0366141B2 JP 58054508 A JP58054508 A JP 58054508A JP 5450883 A JP5450883 A JP 5450883A JP H0366141 B2 JPH0366141 B2 JP H0366141B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow molded
- molded body
- hollow
- closed
- parison
- 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
- 239000012530 fluid Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- 229920001169 thermoplastic Polymers 0.000 claims description 8
- 239000004416 thermosoftening plastic Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims 1
- 229920005989 resin Polymers 0.000 description 10
- 239000011347 resin Substances 0.000 description 10
- 238000007789 sealing Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000000071 blow moulding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000003860 storage 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/10—Closing
-
- 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
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C49/4817—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity with means for closing off parison ends
-
- 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
- B29C49/72—Deflashing outside the mould
-
- 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
- B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
- B29C49/428—Joining
- B29C49/42802—Joining a closure or a sealing foil to the article or pincing the opening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、熱可塑性合成樹脂製の食品容器等、
中空成形体の製造方法に関するものである。[Detailed Description of the Invention] The present invention provides food containers etc. made of thermoplastic synthetic resin.
The present invention relates to a method for manufacturing a hollow molded body.
従来から、食品容器等として、熱可塑性合成樹
脂の中空成形体が広く用いられており、食品容器
等にあつては、食品を充填する前の輸送や貯蔵中
に、内部に塵埃等の異物が入るのを防止するうえ
から、また、中空体成形体の立体形状が損なわれ
ないようにするために、中空体成形体を密閉状に
することが行われている。 Hollow molded thermoplastic synthetic resin bodies have traditionally been widely used as food containers, etc., and when food containers, etc. are transported or stored before being filled with food, foreign matter such as dust may get inside them. In order to prevent this from entering the hollow body molded body and to prevent the three-dimensional shape of the hollow body molded body from being damaged, the hollow body molded body is sealed.
この種の食品容器等、中空成形体は、ブロー成
形によつて製造されるので、成形された中空成形
体には、成形時にパリスン内に圧力流体を導入す
るための連通部が開口部として残る。このため、
成形後の中空成形体を密閉するには、成形後の導
入部を熱溶着する必要がある。 Hollow molded bodies such as this type of food container are manufactured by blow molding, so a communicating part for introducing pressure fluid into the parison remains as an opening in the molded hollow molded body during molding. . For this reason,
In order to seal the hollow molded body after molding, it is necessary to thermally weld the introduction part after molding.
ブロー成形された中空成形体に生じたブロー穴
を封止する技術としては、特開昭47−29457号公
報または特開昭50−128758号公報に記載されてい
るもの等が知られている。 As a technique for sealing a blow hole formed in a blow-molded hollow molded body, there are known techniques such as those described in JP-A-47-29457 or JP-A-50-128758.
しかし、このようなブロー穴を封止する技術
は、ブロー工程中の金型内で行うので、膨張時の
圧力が抜けきらない状態で封止されることがあ
り、製造される中空成形体が変形したり、破裂し
たりすることがあつた。 However, since this technique of sealing the blow hole is carried out inside the mold during the blowing process, the blow hole may be sealed before the pressure during expansion can be completely released, and the hollow molded product produced may be damaged. It could become deformed or burst.
そこで、ブロー工程後にブロー穴を封止する技
術がある。これはブロー時にパリスン内に圧力流
体を導入するために形成された連通部が開口部と
して残つたものを、ブロー工程後に熱溶着するも
のである。しかし、ブロー成形された中空成形体
に、圧力流体を導入するために生じた連通部を封
止するには、その導通部の周囲の樹脂を開口方向
に移動させることによつて行われるので、封止し
た連通部の周囲には樹脂の移動による変形痕や小
突起状痕が残る。 Therefore, there is a technique for sealing the blow hole after the blowing process. In this method, a communication portion formed for introducing pressure fluid into the parison during blowing is left as an opening and is thermally welded after the blowing step. However, in order to seal the communication part created for introducing pressure fluid into the blow-molded hollow molded body, it is done by moving the resin around the communication part in the direction of the opening. Around the sealed communicating portion, deformation marks and small protrusion-like marks remain due to the movement of the resin.
このため、製造された多数の中空成形体を収納
袋に詰めて輸送する等の間においては、多数の中
空成形体が互いに接触し摩擦するところから、連
通部を封止したために生じた変形痕や小突起状痕
が他の中空成形体の表面を傷つける原因となるだ
けでなく、小突起状痕の部分が分離して周辺の中
空成形体の表面に付着し、それが中空成形体を開
口した際に異物として内部に入り込む虞がある。 For this reason, when a large number of manufactured hollow molded bodies are packed in a storage bag and transported, etc., many hollow molded bodies come into contact with each other and cause friction, so deformation marks caused by sealing the communication parts are left behind. Not only do small protrusion-like marks cause damage to the surface of other hollow molded bodies, but the small protrusion-like marks also separate and adhere to the surfaces of surrounding hollow molded bodies, which can cause the hollow molded body to open. When this occurs, there is a risk that foreign objects may enter the interior.
本発明は、上記のような従来のものの問題点の
解消を図るものであり、ブロー成形時の圧力流体
の導入によつて中空成形体に生じた連通部を、加
熱した板体を該連通部の突出方向と交差する方向
に移動させることによりその周囲の樹脂を移動さ
せて封止したうえ、さらに中空成形体の当該部分
を加熱軟化状態とし、かつ最終形状に合わせた凹
部を有する押圧体で連通部を樹脂の移動方向と交
差する方向に押圧することにより、中空成形体の
最終形状に整えて、連通部の封止によつて生じた
変形痕はもとより小突起状痕を皆無とし、もつ
て、外観形状に優れ、しかも、輸送中等におい
て、他の中空成形体を損傷したり、あるいは中空
成形体から樹脂の一部が分離して異物となる虞の
無い中空成形体の製造方法を提供することを目的
とするものである。 The present invention aims to solve the problems of the conventional products as described above, and the present invention aims to solve the problems of the conventional ones as described above. By moving the hollow molded body in a direction crossing the protruding direction, the resin around it is moved and sealed, and the part of the hollow molded body is further heated and softened, and a pressed body having a concave portion that matches the final shape is used. By pressing the communicating part in a direction that intersects with the direction of movement of the resin, it is shaped into the final shape of the hollow molded body, eliminating any deformation marks caused by sealing the communicating part, as well as small protrusion-like marks. To provide a method for manufacturing a hollow molded body which has an excellent external shape and is free from the risk of damaging other hollow molded bodies or causing part of the resin to separate from the hollow molded body and become foreign matter during transportation. The purpose is to
以下、本発明の一実施例を図面に基づき説明す
る。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図には本発明に係る製造方法により製造さ
れた密閉状の中空成形体１が示されており、この
中空成形体１は、中空体本体２と頭部３より成つ
ていて、内容物の充填時には、中空体本体２から
頭部３を分離する切断開口により、中空体本体２
の上部に口部４を形成し、その口部４から内容物
を充填するものである。頭部３は中空成形体１を
密閉した閉塞部分５を有している。 FIG. 1 shows a closed hollow molded body 1 manufactured by the manufacturing method according to the present invention, and this hollow molded body 1 consists of a hollow body main body 2 and a head 3, When filling the material, the cutting opening separating the head 3 from the hollow body body 2 allows the hollow body body 2 to be
A mouth part 4 is formed in the upper part of the container, and the contents are filled through the mouth part 4. The head 3 has a closed portion 5 that seals the hollow molded body 1.
第２図ないし第９図には、上記中空成形体１を
製造する製造方法が、工程順に示されている。 2 to 9 show a manufacturing method for manufacturing the above-mentioned hollow molded body 1 in the order of steps.
先ず、可塑化した熱可塑性合成樹脂のパリスン
１２を、対抗した分解形式の金型１１，１１内の
中心位置に導入し、該金型１１，１１の両対向面
を閉鎖密着して、パリスン１２の両開口部を含む
周辺の一部を噛合して溶着し、膨出部１４を形成
する。ここで金型１１，１１は連続成形機により
連続的に締められていく（第２図および第４図）。 First, the parison 12 made of a plasticized thermoplastic synthetic resin is introduced into the center of opposing disassembled molds 11, 11, and the opposing surfaces of the molds 11, 11 are tightly closed to form a parison 12. A part of the periphery including both openings is engaged and welded to form the bulge 14. Here, the molds 11, 11 are continuously tightened by a continuous molding machine (FIGS. 2 and 4).
次いで、金型１１，１１の噛合せ部分の一部よ
り流体噴出ノズル１６の先端を未硬化状態の膨出
部１４に密着し、該流体噴出ノズル１６より圧送
する加圧流体によつて未硬化樹脂を吹圧突破さ
せ、流体噴出ノズル１６から膨出部１４および連
通部１５を通じてパリスン１２内に圧力流体を導
入し、パリスン１２を金型１１，１１の内壁１３
に密着するまで膨張させ、膨出部１４と連通部１
５を一連に形成された中空成形体１を成形する
（第２図および第５図）。 Next, the tip of the fluid ejecting nozzle 16 is brought into close contact with the uncured bulge 14 from a part of the mating portion of the molds 11, 11, and the uncured is heated by the pressurized fluid fed from the fluid ejecting nozzle 16. The resin is blown under pressure and pressure fluid is introduced from the fluid jet nozzle 16 into the parison 12 through the bulging part 14 and the communication part 15, and the parison 12 is inserted into the inner wall 13 of the molds 11, 11.
Inflate the bulging part 14 and the communicating part 1 until it comes into close contact with the
A hollow molded body 1 is formed by forming a series of parts 5 (FIGS. 2 and 5).
上記のようにブロー形成された中空成形体１
は、成形後金型１１，１１から離型する（第６
図）。そして、圧力流体の導入された連通部１５
の部分に、加熱した刃を有する板体２１を該連通
部１５の突出方向と交差する方向に移動させて、
中空体本体２から膨出部１４を分離するととも
に、連通部１５をその周囲の熱可塑性合成樹脂を
移動させて閉塞して中空成形体１を密閉する（第
７図）。次いで、密閉状に形成した中空成形体１
の上記連通部１５の閉塞部分をガスバーナ２２等
により加熱処理して軟化状態とした後（第８図）、
その部分の最終形状に合わせた凹部を有する押圧
部材２３で前記板体２１による閉塞方向と交差す
る方向に押圧して、板体２１による連通部１５の
閉塞時に生じた変形痕や小突起痕を均し、中空成
形体１の当該部分の最終形状に整える（第９図）。 Hollow molded body 1 blow-formed as described above
is released from the molds 11, 11 after molding (sixth
figure). Then, the communication section 15 into which the pressure fluid is introduced
By moving the plate body 21 having a heated blade in a direction intersecting the protruding direction of the communicating portion 15,
The bulging part 14 is separated from the hollow body main body 2, and the thermoplastic synthetic resin around the communicating part 15 is moved and closed to seal the hollow molded body 1 (FIG. 7). Next, the hollow molded body 1 formed into a sealed shape
After heating the closed portion of the communication portion 15 with a gas burner 22 or the like to soften it (FIG. 8),
A pressing member 23 having a recess corresponding to the final shape of the part is pressed in a direction intersecting the direction of closure by the plate 21 to remove deformation marks and small protrusion marks caused when the communicating part 15 is closed by the plate 21. It is leveled and adjusted to the final shape of the relevant portion of the hollow molded body 1 (FIG. 9).
このように、金型１１，１１から離型された中
空成形体１は、その突出する連通部１５がその突
出方向と直行する交差方向に移動する加熱された
板体２１により、連通部１５をその周囲の樹脂を
移動させて閉塞し、次いでその部分を加熱軟化さ
せた状態で、中空成形体１の当該部分の最終形状
と合わせた凹部を有する押圧体２３で、しかも前
記板体２１の移動方向と直交する交差方向に押圧
するので、連通部１５を閉塞する樹脂の移動が、
先ずその突出部を倒すようになされ、次いで押圧
体２３によつて移動した樹脂を均して最終形状に
合わせるように整えるので、連通部１５の閉塞が
迅速かつ確実に行われ、しかもそれに起因する変
形痕や小突起状痕が完全に均され、中空成形体１
の最終形状に正しく沿つた形状のものが得られ
る。 In this way, the hollow molded body 1 released from the molds 11, 11 has its protruding communicating part 15 closed by the heated plate 21 that moves in the cross direction orthogonal to the protruding direction. The surrounding resin is moved and closed, and then the plate body 21 is moved by the pressing body 23 having a concave portion that matches the final shape of the part of the hollow molded body 1 while heating and softening the part. Since the pressure is applied in the cross direction perpendicular to the direction, the movement of the resin that closes the communication portion 15 is
First, the protruding portion is pushed down, and then the transferred resin is leveled by the pressing body 23 to fit the final shape, so that the communication portion 15 is quickly and reliably closed, and the resulting The deformation marks and small protrusion marks are completely smoothed out, and the hollow molded body 1
A shape that correctly follows the final shape of is obtained.
本発明に係る中空成形体の製造方法は、前記の
ように、熱可塑性合成樹脂のパリスンを分割形式
の金型間に把持し、パリスン内に圧力流体を導入
して該パリスンを膨張することにより中空成形体
体を成形し、ついで流体の導入された連通部を閉
塞して密閉状の中空体を成形する中空成形体の製
造方法において、中空成形体の成形後離型してか
ら流体の導入された連通部を、加熱した板体を該
連通部の突出方向と交差する方向に移動させるこ
とにより連通部の周囲の熱可塑性合成樹脂を移動
させて閉塞して中空成形体を密閉するとともに、
この密閉状に形成した中空成形体の前記閉塞部分
を加熱処理して軟化状態とした後、該閉塞部分を
その部分の最終形状に合わせた凹部を有する押圧
部材で前記板体による閉塞方向と交差する方向に
押圧して、板体による連通部の閉塞時に生じた形
状を最終形状に整えるようにしたものであるか
ら、ブロー成形時の圧力流体の導入によつて中空
成形体に生じた連通部を、加熱した板体を該連通
部の突出方向と交差する方向に移動させて封止し
たうえ、さらに、中空成形体の最終形状に整え
て、連通部の封止によつて生じた変形痕はもとよ
り小突起状痕を皆無とし、もつて、外観形状に優
れ、しかも、輸送中等において、他の中空成形体
を損傷したり、あるいは中空成形体から樹脂の一
部が分離して異物となる虞の無い中空成形体を製
造することができる効果が得られる。 As described above, the method for producing a hollow molded body according to the present invention includes gripping a thermoplastic synthetic resin parison between split molds, and introducing a pressure fluid into the parison to expand the parison. In a method for manufacturing a hollow molded body in which a hollow molded body is molded and then a communication portion into which a fluid is introduced is closed to form a sealed hollow body, the hollow molded body is molded and then released from the mold before introducing the fluid. By moving the heated plate in a direction intersecting the protruding direction of the communicating part, the thermoplastic synthetic resin around the communicating part is moved and closed to seal the hollow molded body,
After the closed portion of the hollow molded body formed in a sealed shape is heated to soften it, the closed portion is pressed with a pressing member having a concave portion that matches the final shape of the portion, intersecting the direction of closing by the plate member. By pressing in the direction of The heated plate was moved in a direction intersecting the protruding direction of the communicating part to seal it, and then the hollow molded body was shaped into the final shape to remove the deformation marks caused by sealing the communicating part. In addition, it has no small protrusion marks, has an excellent appearance, and does not damage other hollow molded objects during transportation, or may cause part of the resin to separate from the hollow molded object and become foreign objects. The effect of being able to manufacture a hollow molded body without any risk is obtained.
第１図は本発明に係る製造方法により成形され
た中空成形体の全体正面図、第２図および第３図
は中空成形体のブロー成形態様を示す断面図、第
４図は第２図のＡ−Ａ断面図、第５図は第３図の
Ｂ−Ｂ断面図、第６図ないし第９図は成形された
中空成形体を密閉する工程を順に示した一部の断
面図である。
１……中空成形体、１１，１１……分割金型、
１２……パリスン、１４……膨出部、１５……連
通部、２１……板体、２２……ガスバーナ、２３
……押圧部材。
FIG. 1 is an overall front view of a hollow molded body molded by the manufacturing method according to the present invention, FIGS. 2 and 3 are cross-sectional views showing the blow molding form of the hollow molded body, and FIG. 4 is the same as that of FIG. 5 is a sectional view taken along line BB in FIG. 3, and FIGS. 6 to 9 are partial sectional views sequentially showing the steps of sealing the hollow molded body. 1...Hollow molded body, 11,11...Divided mold,
12...Parison, 14...Bulging part, 15...Communication part, 21...Plate body, 22...Gas burner, 23
...Press member.
Claims (1)
型間に把持し、パリスン内に圧力流体を導入して
該パリスンを膨脹することにより中空体を成形
し、ついで流体の導入された連通部を閉塞して密
閉状の中空体を成形する中空成形体の製造方法に
おいて、中空成形体の成形後離型してから流体の
導入された連通部を、加熱した板体を該連通部の
突出方向に交差する方向に移動させることにより
連通部の周囲の熱可塑性合成樹脂を移動させて閉
塞して中空成形体を密閉するとともに、この密閉
状に形成した中空成形体の前記閉塞部分を加熱処
理して軟化状態とした後、該閉塞部分をその部分
の最終形状に合わせた凹部を有する押圧部材で前
記板体による閉塞方向と交差する方向に押圧し
て、板体による連通部の閉塞時に生じた形状を最
終形状に整えることを特徴とする中空成形体の製
造方法。1 A parison of thermoplastic synthetic resin is held between split-type molds, a hollow body is formed by introducing pressure fluid into the parison and expanding the parison, and then closing the communication portion into which the fluid has been introduced. In the method for manufacturing a hollow molded body, the hollow molded body is molded and then released from the mold, and a heated plate is inserted into the communicating portion into which the fluid is introduced in the protruding direction of the communicating portion. By moving in the intersecting directions, the thermoplastic synthetic resin around the communicating portion is moved and closed to seal the hollow molded body, and the closed portion of the hollow molded body formed in the sealed shape is heated. After softening, the closed portion is pressed in a direction intersecting the closing direction by the plate with a pressing member having a concave portion that matches the final shape of the portion, and the shape formed when the communicating portion is closed by the plate is pressed. A method for producing a hollow molded body, the method comprising shaping the hollow molded body into a final shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054508A JPS59178225A (en) | 1983-03-30 | 1983-03-30 | Preparation of hollow formed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58054508A JPS59178225A (en) | 1983-03-30 | 1983-03-30 | Preparation of hollow formed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178225A JPS59178225A (en) | 1984-10-09 |
| JPH0366141B2 true JPH0366141B2 (en) | 1991-10-16 |
Family
ID=12972576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58054508A Granted JPS59178225A (en) | 1983-03-30 | 1983-03-30 | Preparation of hollow formed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178225A (en) |
-
1983
- 1983-03-30 JP JP58054508A patent/JPS59178225A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59178225A (en) | 1984-10-09 |
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