JPH0134857B2 - - Google Patents
Info
- Publication number
- JPH0134857B2 JPH0134857B2 JP3833181A JP3833181A JPH0134857B2 JP H0134857 B2 JPH0134857 B2 JP H0134857B2 JP 3833181 A JP3833181 A JP 3833181A JP 3833181 A JP3833181 A JP 3833181A JP H0134857 B2 JPH0134857 B2 JP H0134857B2
- Authority
- JP
- Japan
- Prior art keywords
- piece
- wall
- molding
- molded
- flange
- 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
- 239000000463 material Substances 0.000 claims description 39
- 238000000465 moulding Methods 0.000 claims description 22
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 18
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 18
- 229920003002 synthetic resin Polymers 0.000 claims description 11
- 239000000057 synthetic resin Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- -1 polyethylene terephthalate Polymers 0.000 claims description 6
- 238000000071 blow moulding Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229920000573 polyethylene Polymers 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims 1
- 206010040844 Skin exfoliation Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000013065 commercial product Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance 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
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
-
- 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
- B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
-
- 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
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
-
- 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
- B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
- B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3012—Preforms or parisons made of several components at flange portion
- B29C2949/3014—Preforms or parisons made of several components at flange portion partially
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3016—Preforms or parisons made of several components at body portion
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/302—Preforms or parisons made of several components at bottom portion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、ポリエチレンテレフタレート樹脂を
使用した２軸延伸ブロー成形された壜容器と、こ
の壜容器の成形方法に関するもので、さらに詳言
すれば、壜容器を構成する内壁体と外壁体との間
の剥離の防止を目的とするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a biaxial stretch blow-molded bottle using polyethylene terephthalate resin and a method for molding the bottle. The purpose is to prevent separation between the body and the outer wall.
他の目的は、上記した２重壁構造となつた壜容
器を簡単な操作で成形することにある。 Another object of the present invention is to form the above-mentioned double-walled bottle container with a simple operation.
ポリエチレンテレフタレート樹脂（以下、単に
PETと記す）は、その優れた物性、特性ゆえに
各分野の壜容器として多量に利用されるようにな
つている。 Polyethylene terephthalate resin (hereinafter simply referred to as
Due to its excellent physical properties and characteristics, PET (hereinafter referred to as PET) has come to be used in large quantities as containers in various fields.
確かにPETは物理的にもまた化学的にも多く
の優れた点をもつてはいるのであるが、成形され
る壜容器の用途、使用環境に応じて変化する壜容
器に対する要求事項の全て満たすことができるわ
けではなく、これら用途別、使用環境別の要求事
項を満たすべく他の合成樹脂材料と組合さつた多
重壁構造のPET壜容器が考えられるようになつ
てきている。 It is true that PET has many physical and chemical advantages, but it does not satisfy all the requirements for bottles that change depending on the purpose of the bottle and the environment in which it is used. However, in order to meet the requirements of each use and use environment, PET bottles with a multi-wall structure combined with other synthetic resin materials are being considered.
所が、周知の如く、PET製壜体は、その優れ
た特性をより有効に発揮すべく２軸延伸ブロー成
形されることが要求されるのであるが、他の合成
樹脂材料との多重壁構造の壜体を成形する場合、
場合によつては、この他の合成樹脂材料製の壁部
分も２軸延伸ブロー成形される必要が生じてく
る。 However, as is well known, PET bottles are required to be biaxially stretched blow molded in order to more effectively exhibit their excellent properties, but it is not possible to create a multi-walled structure with other synthetic resin materials. When molding a bottle of
In some cases, it may also be necessary to biaxially stretch blow mold other wall parts made of synthetic resin material.
現在の２軸延伸ブロー成形技術からすれば、
PETと他の合成樹脂材料製の多重壁構造となつ
た１次成形品としてのピースを２軸延伸ブロー成
形することに関しては何ら支障はないのである
が、この組合されたPETと他の合成樹脂材料と
の物性の相異、特に相互の相溶性、収縮率の相異
はいかんともしがたく、このためせつかく成形し
てもPET製部分と他の合成樹脂製部分との間が
簡単に剥離してしまい、機械的に弱くなるばかり
か商品として取扱うことができなくなつてしまう
重大な欠点が生じている。 Considering the current biaxial stretch blow molding technology,
There is no problem with biaxial stretch blow molding of a piece as a primary molded product with a multi-walled structure made of PET and other synthetic resin materials, but this combined PET and other synthetic resin material Differences in physical properties between the materials, especially mutual compatibility and shrinkage rates, are difficult to avoid, so even with painstaking molding, it is easy to separate the PET parts from other synthetic resin parts. This is a serious drawback in that it peels off, which not only makes it mechanically weak but also makes it impossible to handle it as a commercial product.
本発明は、上記したPTEと他の合成樹脂とか
ら構成される多重壁構造となつた壜容器における
問題点を解消すべく創案されたもので、以下本発
明の実施例を図面に従つて説明する。 The present invention was devised to solve the problems of the above-described multi-walled bottle containers made of PTE and other synthetic resins.Examples of the present invention will be described below with reference to the drawings. do.
第１図は、本発明による壜体１の一実施例を示
す要部を縦断した正面図で、壜体１は、PET製
の内壁体２と、PET以外の合成樹脂により成形
された外壁体３とから２重壁構造となつている。 FIG. 1 is a longitudinally cross-sectional front view of essential parts showing an embodiment of a bottle 1 according to the present invention, in which the bottle 1 has an inner wall 2 made of PET and an outer wall made of a synthetic resin other than PET. 3, it has a double wall structure.
内壁体２は底部を有する胴部４と壜口を形成す
る口部６と、この口部６と胴部４とを接続する首
部５とから構成されており、外壁体３は、内壁体
２の底部を有する胴部４と首部５の全外表面を覆
う形態で成形されている。 The inner wall body 2 is composed of a body part 4 having a bottom, a mouth part 6 forming a bottle mouth, and a neck part 5 connecting the mouth part 6 and the body part 4. It is molded in such a manner that it covers the entire outer surface of the body part 4 and the neck part 5, each having a bottom part.
内壁体２の首部５と口部６の境界部分の外周面
には鍔片７が一体に突周設されており、この鍔片
７の下面に、外壁体３の上端外周に周設されたフ
ランジ片８が密接触している。 A collar piece 7 is integrally provided on the outer peripheral surface of the boundary between the neck portion 5 and the mouth portion 6 of the inner wall body 2, and a collar piece 7 is provided on the lower surface of this collar piece 7 and is provided around the upper end outer circumference of the outer wall body 3. The flange pieces 8 are in close contact.
さらに、鍔片７の下面には、前記したフランジ
片８の外周端が当接する係止片９が垂下周設され
ている。 Further, on the lower surface of the flange piece 7, a locking piece 9 is provided hanging around the periphery, with which the outer peripheral end of the flange piece 8 mentioned above comes into contact.
本発明による壜体１は上記した如き構成となつ
ているので、内壁体２に対する外壁体３の剥離が
最も発生し易い、外壁体３の開放端である内壁体
２の首部５に組付く部分は、その先端にフランジ
片８が周設され、かつこのフランジ片８は鍔片７
および係止片９によつて外方および上方から保持
された状態となつており、これがためこのフラン
ジ片８部分に内壁体２と外壁体３との間での剥離
の発生する恐れは全くない。 Since the bottle 1 according to the present invention has the above-mentioned configuration, the part attached to the neck 5 of the inner wall 2 which is the open end of the outer wall 3 is where peeling of the outer wall 3 from the inner wall 2 is most likely to occur. is provided with a flange piece 8 around its tip, and this flange piece 8 is connected to the collar piece 7.
and is held from the outside and above by the locking pieces 9, and therefore there is no risk of peeling between the inner wall body 2 and the outer wall body 3 at this flange piece 8 portion. .
このように、外壁体３の開放した上端であるフ
ランジ片８が内壁体２に強固に保持された状態と
なついるので、、例え内壁体２と外壁体３との間
に相溶性がなくとも、内壁体２に対する外壁体３
の組付きは強個にかつ安定して保持されることに
なる。 In this way, the flange piece 8, which is the open upper end of the outer wall 3, is firmly held by the inner wall 2, so even if there is no compatibility between the inner wall 2 and the outer wall 3, , outer wall 3 relative to inner wall 2
The assembly will be held firmly and stably.
また、開放端となつて機械的に最も弱い状態と
なる外壁体３の上端には、平リング状のフランジ
片８が一体設されているので、外壁体３の開放端
は機械的に充分に補強された状態にあり、これが
ため外壁体３の開放端の機械強度不足による剥離
の発生も防止することができる。 In addition, a flat ring-shaped flange piece 8 is integrally provided at the upper end of the outer wall 3, which is the open end and mechanically weakest, so that the open end of the outer wall 3 is mechanically sufficiently secured. It is in a reinforced state, and therefore it is possible to prevent the occurrence of peeling due to insufficient mechanical strength at the open end of the outer wall body 3.
上記の如き構造となつた本発明による壜体の成
形方法としては種々の方法が考えられるが、以下
最も望ましいと思われる壜体の成形方法を説明す
る。 Although various methods can be considered for forming the bottle according to the present invention having the above-mentioned structure, the method for forming the bottle which is considered to be the most desirable will be described below.
まず、外壁体３の成形される１次成形品として
のピース素材１０を成形する。 First, a piece material 10 as a primary molded product on which the outer wall body 3 is to be molded is molded.
このピース素材１０は有底円筒形状をしてい
て、その開放された上端開口部外周にフランジ片
８をすでに一体に成形した構造となつている。 This piece material 10 has a cylindrical shape with a bottom, and has a structure in which a flange piece 8 has already been integrally molded around the outer periphery of the open upper end opening.
ピース素材１０は、射出成形とか押出成形等の
適当な手段で成形されれば良いものであるが、第
２図ないし第４図に、このピース素材１０の成形
手段の例を開示した。 The piece material 10 may be formed by any suitable means such as injection molding or extrusion molding, and examples of the means for forming the piece material 10 are shown in FIGS. 2 to 4.
すなわち、第２図に示す如く、比較的肉厚な平
板形状をした素材１０′を成形可能な温度に加熱
した状態で、第３図に示す如く、型孔１２を覆う
形態で金型１１上に載置し、型孔１２の底部に開
孔された排気孔１３から型孔１２内の空気を排気
して素材１０の一部を有底円筒形状に引込み成形
し、第３図Ａ矢印の箇所で切断することによりフ
ランジ片８を有するピース素材１０を成形する。 That is, as shown in FIG. 2, a relatively thick flat plate-shaped material 10' is heated to a temperature at which it can be molded, and as shown in FIG. The air in the mold cavity 12 is exhausted from the exhaust hole 13 opened at the bottom of the mold cavity 12, and a part of the material 10 is drawn into a cylindrical shape with a bottom. A piece material 10 having a flange piece 8 is formed by cutting at a certain point.
また第４図は、第２図に示した素材１０′をイ
ンパクト成形よりピース素材１０に成形する手段
を示すもので、第３図の場合と同様に、型孔１２
を覆う形態で素材１０′を金型１１上に載置し、
この状態からポンチ１４を型孔１２内に押込んで
素材１０′を有底円筒形状に成形し、同時にまた
はしかる後、第４図中Ｂ矢印の箇所で切断してフ
ランジ片８を一体に有するピース素材１０を成形
する。 Furthermore, FIG. 4 shows a means for forming the material 10' shown in FIG. 2 into a piece material 10 by impact molding.
The material 10' is placed on the mold 11 in a form that covers the
From this state, the punch 14 is pushed into the mold hole 12 to form the material 10' into a cylindrical shape with a bottom, and at the same time or after that, it is cut at the location indicated by arrow B in FIG. 4 to create a piece having the flange piece 8 integrally. The material 10 is molded.
このように、どのような成形手段でも良いか
ら、有底円筒形状をし、かつ開口端外周にフラン
ジ片を一体設したピース素材１０を成形してお
く。 In this way, the piece material 10 having a bottomed cylindrical shape and having a flange piece integrally provided on the outer periphery of the opening end is formed using any forming method.
このピース素材１０を、第５図に示す如く、内
壁体２に成形されるPET製のピース本体２′成形
用の金型装置のうちのキヤビテイ１７にピツタリ
と組付け、このピース本体２′成形用の金型装置
を型締めする。 As shown in FIG. 5, this piece material 10 is tightly assembled into the cavity 17 of the mold device for molding the piece body 2' made of PET to be molded on the inner wall body 2, and the piece body 2' is molded. Clamp the mold equipment.
このピース本体２′成形用の金型装置は、前記
したキヤビテイ１７の他に、コア１５そしてコア
ベース１９とによつて構成されているのである
が、ピース素材１０のフランジ片８は、第５図か
ら明らかな如く、コアベース１６が形成する鍔部
７成形用空間内に位置するよう設定されている。 This mold device for molding the piece body 2' is composed of a core 15 and a core base 19 in addition to the cavity 17 described above, and the flange piece 8 of the piece material 10 is As is clear from the figure, it is set to be located within the space for molding the flange 7 formed by the core base 16.
ピース本体２′は、このコア１５、コアベース
１６、キヤビテイ１７そしてピース素材１０によ
つて形成される成形空間内にPETを射出して成
形されるわけであるが、すなわちピース素材１０
を成形型枠の一部としてインサート成形されるわ
けであるが、この際第５図に示す如く、ピース素
材１０の底部に、前もつて通孔１０ａを開孔して
おき、この通孔１０ａに対向してキヤビテイ１７
に形成されたゲート１８を通してPETを射出す
るのがピース本体２′の成形上好都合である。 The piece body 2' is molded by injecting PET into the molding space formed by the core 15, core base 16, cavity 17, and piece material 10.
As shown in FIG. Cavity 17 facing the
It is convenient for molding the piece body 2' to inject PET through the gate 18 formed in the body 2'.
このようにして、ピース本体２′を成形するこ
とによつて、このピース本体２′の成形と同時に、
第６図に示したピース体１′が成形されることに
なる。 By molding the piece body 2' in this way, simultaneously with the molding of the piece body 2',
The piece body 1' shown in FIG. 6 is then molded.
このようにして成形されたピース体１′をピー
ス本体２′が２軸延伸効果のできる温度まで加熱
した状態で２軸延伸ブロー成形金型に組付け、壜
体１に２軸延伸ブロー成形するのである。 The piece body 1' formed in this way is heated to a temperature at which the piece body 2' can produce a biaxial stretching effect, and then assembled into a biaxial stretch blow molding mold, and the bottle body 1 is biaxially stretched and blow molded. It is.
この壜体１への２軸延伸ブロー成形する際に、
ピース体１′は、ブロー金型装置に、その口部６
の全体と、鍔部７の上面および外周面、そしてフ
ランジ片８の下面までの部分を直接接触させて組
付け保持されるようにする。 When performing biaxial stretch blow molding on this bottle 1,
The piece body 1' is placed in a blow mold device at its opening 6.
The whole part, the upper surface and outer circumferential surface of the flange part 7, and the part up to the lower surface of the flange piece 8 are brought into direct contact to be assembled and held.
これによつて、ピース本体２′と同時に、ピー
ス素材１０もその上端部をブロー金型装置に強固
に保持された状態で、ピース本体２′と一体に２
軸延伸成形を受けることになる。 As a result, at the same time as the piece body 2', the piece material 10 is also molded integrally with the piece body 2', with its upper end firmly held by the blow mold device.
It will undergo axial stretch forming.
このように、ピース本体２′とピース素材１０
とは、その上端部を、一体的にブロー金型装置に
保持された状態で２軸延伸成形を受けて内壁体２
および外壁体３に成形されるので、このブロー金
型装置に保持されて延伸成形を受けないピース本
体２′およびピース素材１０の上端部間に延伸成
形に伴う収縮量の差が生ずることは全くなく、こ
れがため、ピース素材１０の上端部であるフラン
ジ片８と内壁体２との間に延伸成形に伴う収縮量
の差による間隙は全く発出しない。 In this way, the piece body 2' and the piece material 10
The inner wall body 2 is formed by biaxial stretching molding while the upper end thereof is integrally held in a blow mold device.
and the outer wall body 3, there is no difference in the amount of shrinkage caused by stretch forming between the upper end portions of the piece body 2' and the piece material 10 that are held in this blow mold device and are not subjected to stretch forming. Therefore, no gap is generated between the flange piece 8, which is the upper end of the piece material 10, and the inner wall body 2 due to the difference in the amount of shrinkage caused by stretch forming.
もちろん、充分な２軸延伸を受けて成形された
胴部４において、内壁体２と外壁体３との間に収
縮量の差が発生することは充分に考えられること
であるが、この胴部４において発生した内壁体２
と外壁体３との間の収縮量の差は、首部５が胴部
４に比べてはるかに小径であるという機械的条件
のために、この首部５に何ら機械的な力を伝達す
ることがなく、フランジ片８が前記した胴部４に
おける収縮量の差の影響を受けて鍔片７から剥離
するようなことは全くない。 Of course, it is quite conceivable that a difference in the amount of shrinkage will occur between the inner wall body 2 and the outer wall body 3 in the body part 4 which has been formed through sufficient biaxial stretching. Inner wall body 2 generated in 4
The difference in the amount of contraction between the neck 5 and the outer wall 3 is due to the mechanical condition that the neck 5 has a much smaller diameter than the body 4, so that no mechanical force can be transmitted to the neck 5. There is no possibility that the flange piece 8 will peel off from the flange piece 7 due to the difference in the amount of shrinkage in the body 4 described above.
以上の説明から明らかなように、本発明による
壜は、内壁体と外壁体との機械的結合の最も弱い
首部を、外壁体に設けたフランジ片を鍔片により
外側から保持する構造としたので、例えこの首部
に強い外力が作用しても、フランジ片すなわち外
壁体の上端部が内壁体から剥離するようなことが
なく、外壁体に対する外壁体の強固なそして安定
した組付きが達成、保持され、また本発明による
成形方法は、外壁体に成形されるピース素材の上
端部を２軸延伸ブロー金型装置に内壁体に成形さ
れるピース本体と一体に組付け保持された状態で
２軸延伸成形されるので、充分な２軸延伸を受け
ることができると共にピース本体に対するずれの
発生もなく、また延伸成形後に発生する収縮の差
の生ずることもないので、外壁体の上端は、その
ピース体成形時の寸法を保持したまま壜体に成形
されて、収縮の差による剥離を発生する恐れが全
くなく、内壁体と外壁体との組付きの強固な壜体
を得ることができる。 As is clear from the above description, the bottle according to the present invention has a structure in which the neck part where the mechanical connection between the inner wall body and the outer wall body is the weakest is held from the outside by the flange piece provided on the outer wall body by the collar piece. Even if a strong external force is applied to this neck, the flange piece, that is, the upper end of the outer wall, will not separate from the inner wall, and the outer wall can be firmly and stably assembled to the outer wall. Moreover, the molding method according to the present invention is such that the upper end of the piece material to be molded into the outer wall body is assembled and held integrally with the piece body to be molded into the inner wall body in a biaxial stretching blow mold device, and Since it is stretch-molded, it can undergo sufficient biaxial stretching, and there is no deviation from the piece body, and there is no difference in shrinkage that occurs after stretch-molding, so the upper end of the outer wall body is The bottle is molded while maintaining the dimensions at the time of molding, and there is no risk of peeling due to differences in shrinkage, and a strong bottle with an assembled inner wall and outer wall can be obtained.
第１図は本発明による壜体の一実施例を示す要
部縦断面図である。第２図ないし第３図はピース
素材の成形方法の例を示す説明図で、第２図は素
材の斜視図、第３図はこの素材を成形する場合を
示す図であり、第４図は素材を使用してインパク
ト成形によりピース素材を成形する場合を示す図
である。第５図は、ピース素材を金型に組付けて
ピース本体をインサート成形する状態を示す成形
金型の縦断面図である。第６図は成形されたピー
ス体の構成を示す縦断面図である。
符号の説明、１……壜体、１′……ピース体、
２……内壁体、２′……ピース本体、３……外壁
体、４……胴部、５……首部、６……口部、７…
…鍔部、８……フランジ片、９……係止片、１０
……ピース素材、１０′……素材、１１……金型、
１２……型孔、１３……排気孔、１４……ポン
チ、１５……コア、１６……コアベース、１７…
…キヤビテイ。
FIG. 1 is a longitudinal cross-sectional view of a main part showing an embodiment of a bottle according to the present invention. Figures 2 and 3 are explanatory diagrams showing an example of a method for molding a piece material. Figure 2 is a perspective view of the material, Figure 3 is a diagram showing the case of molding this material, and Figure 4 is a diagram showing an example of a method for molding the piece material. It is a figure which shows the case where a piece material is shape|molded by impact molding using a raw material. FIG. 5 is a longitudinal sectional view of the molding die showing a state in which the piece material is assembled into the mold and the piece body is insert-molded. FIG. 6 is a longitudinal sectional view showing the structure of the molded piece body. Explanation of symbols, 1...Bottle, 1'...Piece,
2... Inner wall, 2'... Piece body, 3... Outer wall, 4... Body, 5... Neck, 6... Mouth, 7...
...Flame, 8...Flange piece, 9...Locking piece, 10
...piece material, 10'...material, 11...mold,
12...Mold hole, 13...Exhaust hole, 14...Punch, 15...Core, 16...Core base, 17...
... Cavity.
Claims (1)
エチレンテレフタレート樹脂製の内壁体と、該内
壁体の底部を含む胴部と首部とを覆うポリエチレ
ンテレフタレート樹脂以外の合成樹脂で成形され
た外壁体とから成る２重壁構造を有し、前記内壁
体の口部と首部との境界部分に突周設された鍔片
の下面に密接触するフランジ片を前記外壁体の上
端に周設し、該フランジ片の外周端が突当る係止
片を前記鍔片の下面周端に周設して成る合成樹脂
製壜容器。 ２ ポリエチレンテレフタレート樹脂以外の合成
樹脂材料によつて有底円筒形状をしかつ上端開口
部外周にフランジ片を周設したピース素材を成形
しておき、該ピース素材を成形型枠の一部として
ポリエチレンテレフタレート樹脂製のピース本体
を射出成形によりインサート成形してピース本体
と前記ピース素材とから成るピース体を成形し、
該ピース体をピース本体が２軸延伸効果の出る温
度まで再加熱した状態で前記ピース体の口部から
首部にかけての部分を金型に組付けて２軸延伸ブ
ロー成形により壜本体に成形する合成樹脂製壜体
の成形方法。[Scope of Claims] 1. An inner wall body made of polyethylene terephthalate resin consisting of a body including a bottom, a neck, and a mouth, and a synthetic resin other than polyethylene terephthalate resin covering the body and neck including the bottom of the inner wall. It has a double wall structure consisting of an outer wall formed of A synthetic resin bottle container comprising a locking piece provided around the upper end and against which the outer peripheral end of the flange piece abuts, and provided around the lower peripheral end of the flange piece. 2 A piece material having a cylindrical shape with a bottom and a flange piece provided around the outer periphery of the upper opening is molded from a synthetic resin material other than polyethylene terephthalate resin, and the piece material is used as a part of the molding frame to form polyethylene. A piece body made of terephthalate resin is insert-molded by injection molding to form a piece body consisting of the piece body and the piece material,
Synthesis, in which the piece body is reheated to a temperature at which the piece body produces a biaxial stretching effect, and a portion of the piece body from the mouth to the neck is assembled into a mold and formed into a bottle body by biaxial stretching blow molding. Method for molding resin bottles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3833181A JPS57151314A (en) | 1981-03-17 | 1981-03-17 | Synthetic resin made bottle and method for molding the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3833181A JPS57151314A (en) | 1981-03-17 | 1981-03-17 | Synthetic resin made bottle and method for molding the same |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56071887A Division JPS57152925A (en) | 1981-05-13 | 1981-05-13 | Method of molding piece with double wall structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57151314A JPS57151314A (en) | 1982-09-18 |
| JPH0134857B2 true JPH0134857B2 (en) | 1989-07-21 |
Family
ID=12522289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3833181A Granted JPS57151314A (en) | 1981-03-17 | 1981-03-17 | Synthetic resin made bottle and method for molding the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57151314A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5991038A (en) * | 1982-11-18 | 1984-05-25 | Toyo Seikan Kaisha Ltd | Manufacture of bottle |
| JP4618581B2 (en) * | 2005-02-28 | 2011-01-26 | 株式会社吉野工業所 | Resin storage container and manufacturing method thereof |
| JP4847097B2 (en) * | 2005-10-25 | 2011-12-28 | アサヒビール株式会社 | Transport device |
| JP5267901B2 (en) | 2007-06-29 | 2013-08-21 | 株式会社吉野工業所 | Synthetic resin double container by direct blow molding method |
| US11247381B2 (en) | 2013-06-28 | 2022-02-15 | Dai Nippon Printing Co., Ltd. | Composite container, inner label and plastic member |
| JP6968740B2 (en) * | 2013-06-28 | 2021-11-17 | 大日本印刷株式会社 | Manufacturing method of composite container |
| JP6686273B2 (en) * | 2014-11-26 | 2020-04-22 | 大日本印刷株式会社 | Blow molding method |
| JP6672867B2 (en) * | 2016-02-15 | 2020-03-25 | 大日本印刷株式会社 | Method for producing composite preform and method for producing composite container |
| JP7062491B2 (en) * | 2018-03-29 | 2022-05-06 | 大日本印刷株式会社 | Composite container |
| JP7246822B2 (en) * | 2018-08-31 | 2023-03-28 | 株式会社吉野工業所 | Synthetic resin container, synthetic resin container manufacturing method, and laminated preform |
| JP2020111056A (en) * | 2020-03-16 | 2020-07-27 | 大日本印刷株式会社 | Blow molding method, composite preform, composite container, inner label member and plastic member |
| JP2021014128A (en) * | 2020-11-16 | 2021-02-12 | 大日本印刷株式会社 | Composite preform |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5271559A (en) * | 1971-12-30 | 1977-06-15 | Valyi Emery I | Composite plastic product |
| JPS5383884A (en) * | 1976-12-28 | 1978-07-24 | Yoshino Kogyosho Co Ltd | Gradation colored bottle and method of forming same |
| JPS54115981A (en) * | 1978-03-01 | 1979-09-08 | Yoshizaki Kozo | Shaped container and making method thereof |
-
1981
- 1981-03-17 JP JP3833181A patent/JPS57151314A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5271559A (en) * | 1971-12-30 | 1977-06-15 | Valyi Emery I | Composite plastic product |
| JPS5383884A (en) * | 1976-12-28 | 1978-07-24 | Yoshino Kogyosho Co Ltd | Gradation colored bottle and method of forming same |
| JPS54115981A (en) * | 1978-03-01 | 1979-09-08 | Yoshizaki Kozo | Shaped container and making method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57151314A (en) | 1982-09-18 |
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