JPH08244749A - Plastic container and production thereof - Google Patents
Plastic container and production thereofInfo
- Publication number
- JPH08244749A JPH08244749A JP7953295A JP7953295A JPH08244749A JP H08244749 A JPH08244749 A JP H08244749A JP 7953295 A JP7953295 A JP 7953295A JP 7953295 A JP7953295 A JP 7953295A JP H08244749 A JPH08244749 A JP H08244749A
- Authority
- JP
- Japan
- Prior art keywords
- leg
- plastic container
- wall
- container
- plastic
- 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
- 239000004033 plastic Substances 0.000 title claims abstract description 44
- 229920003023 plastic Polymers 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 3
- QCDFBFJGMNKBDO-UHFFFAOYSA-N Clioquinol Chemical compound C1=CN=C2C(O)=C(I)C=C(Cl)C2=C1 QCDFBFJGMNKBDO-UHFFFAOYSA-N 0.000 abstract 2
- 235000014171 carbonated beverage Nutrition 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 235000015203 fruit juice Nutrition 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
- B65D1/0261—Bottom construction
- B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
-
- 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
-
- 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
- B29C49/54—Moulds for undercut articles
-
- 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
- B29C2049/4807—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by movable mould parts in the mould halves
-
- 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
- B29C49/54—Moulds for undercut articles
- B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
- B29C2049/548—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles the movement of the mould parts during opening of the mould are interlinked
-
- 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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- 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
- B29C49/06—Injection 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
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C49/4812—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity and welding opposite wall parts of the parisons or preforms to each other
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は液体内容物を冷間充填
後、熱水シャワーで内容物を昇温させる果汁或いは乳酸
菌等を含む微炭酸飲料あるいは前記昇温処理をしない炭
酸飲料を充填する場合に使用するプラスチック容器及び
その製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, after cold filling of liquid contents, fills a carbonated beverage containing fruit juice or lactic acid bacteria, etc., which heats the contents with a hot water shower, or a carbonated beverage not subjected to the temperature raising treatment. The present invention relates to a plastic container used in a case and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】プラスチックボトルは、その取扱い上の
利便性の要求から、容器が自立性を持つことが必要とさ
れる場合がある。例えば炭酸飲料を内容物とするボトル
のように、ボトル内に内圧が作用する場合には、容器底
部が耐圧性を持つことが必要である。このために、従
来、容器底部の耐圧性を向上させる技術としてはドーム
状に張り出させることが行なわれているが、この場合は
容器は自立性をもたない。そこでこのドーム状の容器底
部を囲んで円筒状もしくはスカート状の「袴（ベースカ
ップ）」と称される別部材を容器に着けることが行なわ
れる。このドーム状の容器底部と袴をもつ容器は耐圧性
にすぐれているが、別部材を形成してこれを容器に着け
るという別工程が必要である。2. Description of the Related Art Plastic bottles are sometimes required to be self-supporting because of their convenience in handling. For example, in the case where internal pressure acts on the inside of a bottle, such as a bottle containing a carbonated drink, the bottom of the container must have pressure resistance. For this reason, conventionally, as a technique for improving the pressure resistance of the bottom of the container, a dome-shaped protrusion is performed, but in this case, the container does not have self-supporting property. Therefore, a separate member called a "base cup" having a cylindrical or skirt shape is attached to the container so as to surround the bottom of the dome-shaped container. This container having a dome-shaped container bottom and a hakama has excellent pressure resistance, but it requires a separate step of forming another member and attaching it to the container.
【０００３】そこでプラスチックボトルの底を花弁状の
ペタロイド形状に形成してこの部分の変形強度を高めて
耐圧強度を向上させると共にその部分を脚として容器に
自立性を与えることも行われており、これによって耐圧
プラスチックボトルの１ピース化が実現した。Therefore, the bottom of a plastic bottle is formed into a petaloid petaloid shape to increase the deformation strength of this portion to improve the pressure resistance, and at the same time, the portion is used as a leg to make the container self-supporting. This made it possible to make a pressure-resistant plastic bottle into one piece.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、５℃前
後で冷間充填し、６５℃〜７０℃の熱水シャワーで内容
物を昇温させる果汁あるいは乳酸菌等を含む微炭酸飲料
の耐熱圧条件下では、前記のペタロイド形状の底部をも
つプラスチックボトルでも底部の先端部分の収縮や変形
が生じたり、また底部の中心が下側に凸出するロッキン
グ現象が発生したり、さらには入り目線が降下したりす
る可能性がある。However, under the heat and pressure condition of a slightly carbonated beverage containing fruit juice or lactic acid bacteria, which is cold-filled at around 5 ° C. and the content is heated in a hot water shower at 65 ° C. to 70 ° C. Then, even in the plastic bottle with the petaloid-shaped bottom part, the tip part of the bottom part shrinks or deforms, the center of the bottom part protrudes downward, the locking phenomenon occurs, and the line of sight drops further. There is a possibility that
【０００５】この発明は上記の如き事情に鑑みてなされ
たものであって、脚部を有する底部が高い耐熱圧性ある
いは耐圧性を有し、しかも容器の自立性を実現し、か
つ、プラスチックボトルの１ピース化も実現し、さらに
構造が簡単で製造が容易であるプラスチックボトル容器
及びそ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 has been made in view of the above circumstances, and the bottom portion having the legs has high heat and pressure resistance or pressure resistance, realizes the self-supporting property of the container, and is a plastic bottle. It is an object of the present invention to provide a plastic bottle container that can be made into one piece, has a simple structure, and is easy to manufacture, and a method for manufacturing the same.
【０００６】[0006]
【課題を解決するための手段】この目的に対応して、こ
の発明のプラスチック容器は、口部、肩部、胴部、底部
及び脚部を有するプラスチック容器であって、前記底部
は曲面をなして容器の軸方向下方に膨出し、前記底部
に、前記底部の一部分を、折り返し部分を介して二重に
折り返すと共に、その上端を溶着封止した脚部を形成し
たことを特徴とし、また、この発明のプラスチック容器
の製造方法は、口部、肩部、胴部、底部及び脚部を有す
るプラスチック容器の製造方法であって、プリフォーム
を二軸延伸ブロー成形して、脚部相当部が形成された底
部を成形後、前記底部を押し込んで前記脚部相当部を折
り返し部分で折り返して外側脚壁及び内側脚壁を有する
容器壁を形成する工程と、次いで前記容器壁の外側脚壁
及び内側脚壁をその上端部で溶着封止する工程からなる
ことを特徴としている。To this end, the plastic container of the present invention is a plastic container having a mouth, a shoulder, a body, a bottom and legs, the bottom having a curved surface. And bulging downward in the axial direction of the container, a part of the bottom part is double-folded through the folding part, and the bottom part is formed with a leg part in which the upper end is welded and sealed, and The method for producing a plastic container of the present invention is a method for producing a plastic container having a mouth portion, a shoulder portion, a body portion, a bottom portion and a leg portion. After molding the formed bottom portion, the step of pushing the bottom portion and folding back the leg equivalent portion at the folding back portion to form a container wall having an outer leg wall and an inner leg wall, and then an outer leg wall of the container wall and The inner leg wall It is characterized by comprising a step of welding the sealing at the ends.
【０００７】[0007]
【作用】プラスチック容器は底部がドーム状の底部を有
し、その外側に筒状またはスカート状の脚部が設けられ
ていて、脚部を有する底部が良好な耐熱圧性あるいは耐
圧性を発揮する。また、脚部が容器の自立性を与える。
脚部は容器のドーム状の底部壁の一部分を二重に折り重
ねて構成したもので、容器の成形工程で脚部が形成され
るので、容器の１ピース化が実現され製造も容易であ
る。In the plastic container, the bottom has a dome-shaped bottom, and the cylindrical or skirt-shaped leg is provided on the outside thereof, and the bottom having the leg exhibits good heat and pressure resistance or pressure resistance. Also, the legs provide the container with independence.
The legs are formed by double-folding a part of the dome-shaped bottom wall of the container, and the legs are formed in the molding process of the container, so that the container is made into one piece and is easy to manufacture. .
【０００８】[0008]
【実施例】以下、これらの発明の詳細を一実施例を示す
図面について説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of these inventions will be described below with reference to the drawings showing one embodiment.
【０００９】まず、プラスチック容器について説明す
る。図１から図３において１はプラスチック容器であ
る。プラスチック容器１はポリエチレンテレフタレート
等のポリエステルからなり、二軸延伸ブロー成形され軸
線２の上から下にしたがって、口部３、肩部４、胴部
５、底部６及び脚部７を有する。口部３及び底部６の下
端部近傍８は結晶化処理がされていて硬化している。肩
部４及び底部６は曲面状またはドーム状をなしている。
脚部７は底部６に設けられている。脚部７は底部６の一
部分が折り返されて二重になっており、つまり外側脚壁
１１と内側脚壁１２が重なっている。外側脚壁１１，内
側脚壁１２の下端部は折り返し部分１３になっており、
また、外側脚壁１１，内側脚壁１２の上端は両者が溶着
して閉じられ、底部６に一体的に形成されている。脚部
７は末広がりのスカート状若しくは直筒状をなしてい
て、脚部７の下端部１４は底部６の下端部１５よりも下
方に達しており、したがってプラスチック容器１を脚部
７で自立させたときは、底部６の下端部１５は脚部７の
内に位置して床面（図示せず）に触れることはない。First, the plastic container will be described. 1 to 3, reference numeral 1 is a plastic container. The plastic container 1 is made of polyester such as polyethylene terephthalate and is biaxially stretch blow molded, and has a mouth portion 3, a shoulder portion 4, a body portion 5, a bottom portion 6 and a leg portion 7 in order from the top to the bottom of the axis 2. The vicinity of the lower end portion 8 of the mouth portion 3 and the bottom portion 6 is crystallized and hardened. The shoulder portion 4 and the bottom portion 6 are curved or domed.
The leg portion 7 is provided on the bottom portion 6. The leg portion 7 is doubled by folding a part of the bottom portion 6, that is, the outer leg wall 11 and the inner leg wall 12 overlap each other. The lower ends of the outer leg wall 11 and the inner leg wall 12 are folded back portions 13,
The upper ends of the outer leg wall 11 and the inner leg wall 12 are welded and closed, and are integrally formed on the bottom portion 6. The leg portion 7 has a skirt shape or a straight tube shape that widens toward the end, and the lower end portion 14 of the leg portion 7 reaches below the lower end portion 15 of the bottom portion 6. Therefore, the plastic container 1 is allowed to stand on its own. At this time, the lower end portion 15 of the bottom portion 6 is located inside the leg portion 7 and does not touch the floor surface (not shown).
【００１０】底部６は下方すなわち、下端部１５に行く
ほど外径が小さくなる曲面状になっていて下方部分ほど
小径になっている。脚部７の下端部１４の外径Ｄ2 は胴
部５の外径Ｄ1 とほぼ同じであるかまたは外径Ｄ1 より
も小さく、脚部７の下端部１４の外径Ｄ2 は胴部５の外
径Ｄ1 の１００％〜６０％の大きさで、特に１００〜８
０％がプラスチック容器１の搬送性及び自立安定性の面
で望ましい。The bottom portion 6 has a curved shape in which the outer diameter becomes smaller toward the lower portion 15, that is, toward the lower end portion 15, and the lower portion has a smaller diameter. Leg outer diameter D 2 of lower portion 14 of 7 is smaller than the outer diameter D 1 and or outer diameter D 1 is approximately the same in the body portion 5, the outer diameter D 2 of lower portion 14 of the leg 7 cylinder 100% to 60% of the outer diameter D 1 of the part 5, especially 100 to 8
0% is desirable in terms of transportability of the plastic container 1 and independence stability.
【００１１】次に、プラスチック容器１の製造方法につ
いて説明する。この製造方法は二軸延伸ブロー工程とそ
れに続く溶着工程とからなる。図４には二軸延伸ブロー
工程が示されている。この二軸延伸ブロー工程では成形
金型２１を使用する。成形金型２１は二軸延伸ブロー工
程後に底部６の後述する脚部相当部２６を押込む脚部成
形金型部分２２を有している。脚部成形金型部分２２は
容器壁１０の軸線２の方向に移動可能である。Next, a method of manufacturing the plastic container 1 will be described. This manufacturing method includes a biaxial stretching blow step and a subsequent welding step. The biaxial stretching blow process is shown in FIG. A molding die 21 is used in this biaxial stretching blow process. The molding die 21 has a leg molding die portion 22 into which a leg equivalent portion 26 of the bottom portion 6 which will be described later is pushed after the biaxial stretching blow process. The leg molding die portion 22 is movable in the direction of the axis 2 of the container wall 10.
【００１２】まず、二軸延伸ブロー成形用のプリフォー
ム２４を成形金型２１内にセットする（図４（ａ））。
この時成形金型２１では脚部成形金型部分２２は下降し
た位置にある。プリフォーム２４はプラスチック容器１
の口部３及び少なくとも底部６の下端部近傍８に対応す
る部分が結晶化処理されていて硬化している。この状態
から、通常の方法でプリフォーム２４内に空気を吹き込
み、プリフォーム２４を二軸延伸ブローさせて、容器壁
１０を形成する（図４（ｂ））。容器壁１０の形状は脚
部成形金型部分２２を含む成形金型２１によって与えら
れる。また容器壁１０の底部６は脚部相当部２６を有し
ており、この脚部相当部２６では外側脚壁１１、折り返
し部分１３及び内側脚壁１２が上下に連続していて、折
り返し部分１３を中心にしてそれぞれ外側脚壁１１及び
内側脚壁１２の相当部が形成される。First, the preform 24 for biaxial stretch blow molding is set in the molding die 21 (FIG. 4 (a)).
At this time, in the molding die 21, the leg molding die portion 22 is in the lowered position. Preform 24 is a plastic container 1
The mouth portion 3 and at least the portion corresponding to the lower end vicinity 8 of the bottom portion 6 have been crystallized and hardened. From this state, air is blown into the preform 24 by a usual method to biaxially stretch and blow the preform 24 to form the container wall 10 (FIG. 4B). The shape of the container wall 10 is provided by a mold 21 including a leg mold portion 22. Further, the bottom portion 6 of the container wall 10 has a leg-corresponding portion 26, and in this leg-corresponding portion 26, the outer leg wall 11, the folded-back portion 13 and the inner leg wall 12 are vertically continuous, and the folded-back portion 13 is formed. Corresponding portions of the outer leg wall 11 and the inner leg wall 12 are formed around the center.
【００１３】次に、脚部成形金型部分２２を上昇させて
容器壁１０の底部６を押上げて底上げをする（図４
（ｃ））。これによって容器壁１０の脚部相当部２６が
折り返し部分１３で折り返し、外側脚壁１１，内側脚壁
１２が重なる。外側脚壁１１の上端部及び内側脚壁１２
の上端部は底部６に連続する。このとき、折り返し部分
１３の下端部は底部６の下端部１５よりも下方に達して
いる。Next, the leg molding die portion 22 is raised to push up the bottom portion 6 of the container wall 10 to raise the bottom (FIG. 4).
(C)). As a result, the leg-corresponding portion 26 of the container wall 10 is folded back at the folded-back portion 13, and the outer leg wall 11 and the inner leg wall 12 overlap. The upper end of the outer leg wall 11 and the inner leg wall 12
The upper end of the is continuous with the bottom 6. At this time, the lower end portion of the folded-back portion 13 reaches below the lower end portion 15 of the bottom portion 6.
【００１４】次に容器壁１０を成形金型２１からはず
し、図５に示す第２工程である溶着工程に移す。溶着工
程では溶着装置３１を使用する。溶着装置３１はターレ
ット２７とグリッパー２８と支持部材２９と超音波振動
型３０を有し、ターレット２７、グリッパー２８、支持
部材２９によって容器壁１０を位置決めし、グリッパー
２８と支持部材２９で容器壁１０の折り重なった脚部相
当部２６を上下から押えた状態で超音波振動型３０の先
端部を脚部相当部２６の上端部近傍の内側に押しつけた
状態で超音波振動させ、脚部相当部２６において外側脚
壁１１と内側脚壁１２とを活性化させてその上端部を溶
着し、脚部７を形成する。これによって脚部７を有する
プラスチック容器１が完成し、プラスチック容器１を溶
着装置３１から取り出す。そしてこのプラスチック容器
１を耐熱圧用容器として使用する。Next, the container wall 10 is removed from the molding die 21 and transferred to the welding step which is the second step shown in FIG. In the welding process, the welding device 31 is used. The welding device 31 has a turret 27, a gripper 28, a support member 29, and an ultrasonic vibration die 30, and positions the container wall 10 by the turret 27, the gripper 28, and the support member 29, and the gripper 28 and the support member 29 allow the container wall 10 to be positioned. While the folded leg-corresponding part 26 is pressed from above and below, the tip end of the ultrasonic vibration die 30 is ultrasonically vibrated while being pressed inside the vicinity of the upper end of the leg-corresponding part 26. At, the outer leg wall 11 and the inner leg wall 12 are activated and their upper ends are welded to form the leg portion 7. As a result, the plastic container 1 having the legs 7 is completed, and the plastic container 1 is taken out from the welding device 31. And this plastic container 1 is used as a container for heat-resistant pressure.
【００１５】また、耐圧用容器に使用する場合は、耐熱
性は必要ないため、プラスチック容器１の口部３が底部
６の下端部近傍８に対応する部分が結晶化処理されてい
ないプリフォーム２４を使用して二軸延伸ブロー成形さ
れる。そして他の工程は、上述した耐熱圧用容器と同様
に行われる。Further, when used in a pressure resistant container, heat resistance is not required, so that the portion of the plastic container 1 where the mouth 3 corresponds to the vicinity of the lower end 8 of the bottom 6 is not pre-crystallized. Is biaxially stretch blow molded. Then, the other steps are performed in the same manner as the heat resistant pressure container described above.
【００１６】[0016]
【発明の効果】本発明のプラスチック容器によれば、底
部の脚部が充分に延伸され、かつ溶着されているため収
縮や変形あるいは底部の中心が下側に凸出するロッキグ
が防止され、さらに優れた容器の自立安定性及び搬送性
を耐熱圧下あるいは耐圧下で実現する。EFFECTS OF THE INVENTION According to the plastic container of the present invention, since the legs of the bottom portion are sufficiently stretched and welded, it is possible to prevent shrinkage or deformation, or rocking in which the center of the bottom portion is projected downward. Achieves excellent container self-supporting stability and transportability under heat resistant pressure or pressure resistant.
【００１７】また本発明の製造方法によれば、従来のボ
トルよりも脚部相当部２６の分だけ容器壁１０の軸線２
方向の長さが長いので、同じ長さのプリフォームを使用
した場合に比べて、二軸延伸ブロー時に、縦倍率が大き
くとれるので、成形後のプラスチック容器１の引張り強
度が向上し、また、プラスチック容器１全体の肉厚分布
を安定させることができる。また脚部７の形成時も、肉
厚分布が安定しているため溶着性が良好であり、さらに
従来のペタロイド形状に比べて脚部７の下端部１４が充
分に延伸されているため、落下強度も向上したプラスチ
ック容器が得られる。According to the manufacturing method of the present invention, the axis 2 of the container wall 10 is larger than that of the conventional bottle by the amount corresponding to the leg portion 26.
Since the length in the direction is long, as compared with the case where a preform having the same length is used, the longitudinal ratio can be increased at the time of biaxial stretching and blowing, so that the tensile strength of the plastic container 1 after molding is improved, and The thickness distribution of the entire plastic container 1 can be stabilized. Further, even when the leg portion 7 is formed, the weldability is good because the thickness distribution is stable, and the lower end portion 14 of the leg portion 7 is sufficiently stretched as compared with the conventional petaloid shape, so that it is dropped. A plastic container having improved strength can be obtained.
【図１】プラスチック容器の正面図。FIG. 1 is a front view of a plastic container.
【図２】プラスチック容器の底面図。FIG. 2 is a bottom view of the plastic container.
【図３】プラスチック容器の部分断面正面図。FIG. 3 is a partial sectional front view of a plastic container.
【図４】二軸延伸ブロー工程を示す説明図。FIG. 4 is an explanatory view showing a biaxial stretching blow process.
【図５】溶着工程を示す説明図。FIG. 5 is an explanatory view showing a welding process.
１ プラスチック容器 ２ 軸線 ３ 口部 ４ 肩部 ５ 胴部 ６ 底部 ７ 脚部 ８ 下端部近傍 １０ 容器壁 １１ 外側脚壁 １２ 内側脚壁 １３ 折り返し部分 １４ 下端 １５ 下端部 ２１ 成形金型 ２２ 脚部成形金型部分 ２４ プリフォーム ２６ 脚部相当部 ２７ ターレット ２８ グリッパー ２９ 支持部材 ３０ 超音波振動型 ３１ 溶着装置 Ｄ1 胴部の外径 Ｄ2 脚部の外径1 plastic container 2 axis 3 mouth part 4 shoulder part 5 body part 6 bottom part 7 leg part 8 near lower end part 10 container wall 11 outer leg wall 12 inner leg wall 13 folding part 14 lower end 15 lower end part 21 molding die 22 leg part molding Mold part 24 Preform 26 Leg equivalent part 27 Turret 28 Gripper 29 Supporting member 30 Ultrasonic vibration type 31 Welding device D 1 Outer diameter of body D 2 Outer diameter of leg
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｃ 65/08 7639−4Ｆ Ｂ２９Ｃ 65/08 Ｂ２９Ｌ 22:00 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location // B29C 65/08 7639-4F B29C 65/08 B29L 22:00
Claims (6)
るプラスチック容器であって、前記底部は曲面をなして
容器の軸方向下方に膨出し、前記底部に、前記底部の一
部分を、折り返し部分を介して二重に折り返すと共に、
その上端を溶着封止した脚部を形成したことを特徴とす
るプラスチック容器。1. A plastic container having a mouth portion, a shoulder portion, a body portion, a bottom portion and a leg portion, wherein the bottom portion has a curved surface and bulges downward in the axial direction of the container, and the bottom portion has a part of the bottom portion. Double fold through the fold back part,
A plastic container having a leg portion formed by welding and sealing the upper end thereof.
記脚部の下端部の外径が、胴部の外径の１００％〜８０
％であることを特徴とする請求項１記載のプラスチック
容器。2. The leg portion is in the shape of a skirt that widens toward the end, and the outer diameter of the lower end portion of the leg portion is 100% to 80% of the outer diameter of the body portion.
%, The plastic container according to claim 1.
傍が結晶化処理されていることを特徴とする請求項１ま
たは請求項２記載のプラスチック容器。3. The plastic container according to claim 1, wherein the mouth and at least the vicinity of the lower end of the bottom are crystallized.
るプラスチック容器の製造方法であって、プリフォーム
を二軸延伸ブロー成形して、脚部相当部が形成された底
部を成形後、前記底部を押し込んで前記脚部相当部を折
り返し部分で折り返して外側脚壁及び内側脚壁を有する
容器壁を形成する工程と、次いで前記容器壁の外側脚壁
及び内側脚壁をその上端部で溶着封止する工程からなる
ことを特徴とするプラスチック容器の製造方法。4. A method of manufacturing a plastic container having a mouth portion, a shoulder portion, a body portion, a bottom portion and a leg portion, wherein a preform is biaxially stretch blow molded to form a bottom portion corresponding to a leg portion. After molding, the step of pushing in the bottom part and folding back the leg equivalent part at the folded back portion to form a container wall having an outer leg wall and an inner leg wall, and then forming an outer leg wall and an inner leg wall of the container wall A method of manufacturing a plastic container, comprising a step of welding and sealing at an upper end portion.
とする請求項４記載のプラスチック容器の製造方法。5. The method of manufacturing a plastic container according to claim 4, wherein the welding is performed by ultrasonic vibration.
状の外側脚壁、折り返し部分及び曲面状の内側脚壁から
なることを特徴とする請求項４または請求項５記載のプ
ラスチック容器の製造方法。6. The production of a plastic container according to claim 4, wherein the leg-corresponding portion comprises a tapered outer leg wall, a folded back portion, and a curved inner leg wall. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7953295A JPH08244749A (en) | 1995-03-10 | 1995-03-10 | Plastic container and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7953295A JPH08244749A (en) | 1995-03-10 | 1995-03-10 | Plastic container and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08244749A true JPH08244749A (en) | 1996-09-24 |
Family
ID=13692609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7953295A Pending JPH08244749A (en) | 1995-03-10 | 1995-03-10 | Plastic container and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08244749A (en) |
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