JPS6157183B2 - - Google Patents

Info

Publication number
JPS6157183B2
JPS6157183B2 JP21529981A JP21529981A JPS6157183B2 JP S6157183 B2 JPS6157183 B2 JP S6157183B2 JP 21529981 A JP21529981 A JP 21529981A JP 21529981 A JP21529981 A JP 21529981A JP S6157183 B2 JPS6157183 B2 JP S6157183B2
Authority
JP
Japan
Prior art keywords
liquid
tank body
tank
bellows
mold
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
Application number
JP21529981A
Other languages
Japanese (ja)
Other versions
JPS58118223A (en
Inventor
Naomichi Sasa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP56215299A priority Critical patent/JPS58118223A/en
Publication of JPS58118223A publication Critical patent/JPS58118223A/en
Publication of JPS6157183B2 publication Critical patent/JPS6157183B2/ja
Granted legal-status Critical Current

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
    • 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
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0724—Preforms or parisons characterised by their configuration having variable wall thickness 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0725—Preforms or parisons characterised by their configuration having variable wall thickness at bottom 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
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0761—Preforms or parisons characterised by their configuration characterised by the shape characterised by overall the shape
    • 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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/0778—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the flange
    • 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
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the 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
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/703—Bellows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7172—Fuel tanks, jerry cans

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (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)
  • Containers Having Bodies Formed In One Piece (AREA)

Description

【発明の詳細な説明】 本発明は、液体タンク特に車両に搭載する各種
の液体タンクおよびその製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to liquid tanks, particularly various liquid tanks mounted on vehicles, and methods of manufacturing the same.

たとえばラジエータの冷却液のリザーブタン
ク、ブレーキオイルのリザーブタンク、クラツチ
オイルのリザーブタンクなどは、車両の走行時等
に振動しても液漏れを生じないことが必要であ
る。この液漏れ防止のために、従来は、タンク本
体頂部のキヤツプに外気と通ずるエア抜き用の小
孔を開け、かつタンク内の液面とこの小孔との間
に迷路を設けていた。 For example, a radiator coolant reserve tank, a brake oil reserve tank, a clutch oil reserve tank, etc. must not leak even if the vehicle vibrates while the vehicle is running. In order to prevent this liquid from leaking, conventionally, a small hole was made in the cap at the top of the tank body to communicate with the outside air for venting air, and a labyrinth was provided between the liquid level in the tank and this small hole.

しかしながら、このように外気と液面との間に
迷路のような余地（空間）を設けると、振動時や
高温時等に液体が発泡したり、霧状となつたりし
た場合、液体が外部に漏れるのを防ぐことは困難
で特に限られたスペースでは不可能に近い。 However, if a labyrinth-like room (space) is provided between the outside air and the liquid surface, if the liquid foams or becomes a mist during vibrations or high temperatures, the liquid may leak outside. Preventing leaks is difficult and nearly impossible, especially in confined spaces.

本発明の目的は、上記従来の液体タンクの問題
点を克服し、振動時や高温時等にも液漏れを生ず
ることのない、改良された液体タンクおよびその
製造方法を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to provide an improved liquid tank that overcomes the above-mentioned problems of conventional liquid tanks and does not cause liquid leakage even during vibrations or high temperatures, and a method for manufacturing the same.

この目的を達成するため、本第一発明は、 タンク本体の底部に開口したジヨイント部を有
し、頂部の開口部に着脱自在のキヤツプを有する
液体タンクにおいて、タンク本体が合成樹脂で一
体的に成型され、かつ、タンク本体の胴部の一部
または全体がベローズに形成されてなることを特
徴とし、 また、本第二発明は、 一端が開口した合成樹脂よりなる筒体を、長手
方向に肉厚部と肉薄部とを有するようにインジエ
クシヨン成型し、ついで該成型した筒体を金型内
に挿入してブロー成型し、前記肉薄部をベローズ
に形成せしめ、かつ閉端部を開口せしめることを
特徴とするものである。 To achieve this object, the first invention provides a liquid tank having a joint portion opened at the bottom of the tank body and a detachable cap at the opening at the top, the tank body being integrally made of synthetic resin. The tank body is molded, and a part or the whole of the body of the tank body is formed into a bellows shape.The second invention also provides a cylinder body made of synthetic resin with one end open, extending in the longitudinal direction. Injection molding is performed to have a thick wall portion and a thin wall portion, and then the molded cylinder is inserted into a mold and blow molded to form the thin wall portion into a bellows, and the closed end portion is opened. It is characterized by:

以下、図によつて本発明を具体的に説明する。 Hereinafter, the present invention will be specifically explained with reference to the drawings.

第１図は、本発明の一実施例よりなる液体タン
クの縦断面図である。 FIG. 1 is a longitudinal sectional view of a liquid tank according to an embodiment of the present invention.

同図において、１は合成樹脂で一体成型された
液体タンク本体であり、その底部に開口し、かつ
下方に向け突出したジヨイント部２を有し、また
頂部の開口部に着脱自在のキヤツプ３を有してい
る。すなわち、タンク本体１の頂部外周にネジ部
４が設けられ、パツキン５を介してキヤツプ３が
液密に螺合されている。なお、このキヤツプ３に
はエア抜き用の小孔は設けられていない。また、
ジヨイント部２は例えば、ラジエーターの圧力キ
ヤツプのオーバーフロー側へ連絡するためのもの
である。 In the figure, reference numeral 1 denotes a liquid tank body integrally molded from synthetic resin, which has a joint part 2 that opens at the bottom and projects downward, and has a removable cap 3 at the opening at the top. have. That is, a threaded portion 4 is provided on the outer periphery of the top of the tank body 1, and a cap 3 is screwed into the tank body 1 through a packing 5 in a fluid-tight manner. Note that this cap 3 is not provided with a small hole for air release. Also,
The joint 2 is, for example, for connecting to the overflow side of a pressure cap of a radiator.

そしてタンク本体１の胴部の一部に、ベローズ
６が形成されて、タンク本体１内に液体７が密封
状態で収容されている。なお、ベローズ６は胴部
の全体に形成されていてもよい。 A bellows 6 is formed in a part of the body of the tank body 1, and a liquid 7 is contained in the tank body 1 in a sealed state. Note that the bellows 6 may be formed over the entire body.

本発明の液体タンクは、このようにタンク本体
１の胴部の一部または全体にベローズ６を形成し
てなるため、タンク本体１内に収容された液体７
の体積変化に追従して、その液体７を密封状態に
収容したままベローズ６が伸縮することができ
る。すなわち、振動時や高温時等にも液体７の揺
動や体積変化に応じて、液体タンク本体１が伸縮
できる。また液面はキヤツプ３の下面に接近した
部分まで挿入でき、空間を少さくできるので、液
体７の泡立ちや霧化による影響はない。 The liquid tank of the present invention has the bellows 6 formed in part or the entire body of the tank body 1 in this way, so that the liquid contained in the tank body 1 can
Following the volume change, the bellows 6 can expand and contract while keeping the liquid 7 in a sealed state. In other words, the liquid tank body 1 can expand and contract in response to the vibrations and volume changes of the liquid 7 even during vibrations or high temperatures. Further, since the liquid level can be inserted up to a portion close to the lower surface of the cap 3, and the space can be reduced, there is no influence from bubbling or atomization of the liquid 7.

したがつて、従来のような液漏れは完全に防止
されることになる。 Therefore, liquid leakage as in the conventional case is completely prevented.

本発明における合成樹脂としては、成型加工が
容易で、かつ弾性の大きな樹脂、たとえばナイロ
ン、ポリエチレン、ポリプロピレン等を、好まし
く用いることができる。また、ベローズ６の伸縮
運動をよりスムーズに行なうために、ベローズ６
部分はタンク本体１の他の部分よりも肉薄に形成
することが必要である。 As the synthetic resin in the present invention, resins that are easy to mold and have high elasticity, such as nylon, polyethylene, polypropylene, etc., can be preferably used. In addition, in order to make the expansion and contraction movement of the bellows 6 smoother, the bellows 6 is
It is necessary to form this part thinner than other parts of the tank body 1.

次に、本発明の液体タンクを製造する方法につ
いて説明する。 Next, a method for manufacturing the liquid tank of the present invention will be explained.

第２図はインジエクシヨン成型によつて造られ
たタンク本体の原型の縦断面図、第３図はブロー
成型におけるタンク本体原型および金型の縦断面
図、および第４図はブロー成型後のタンク本体の
縦断面図である。 Figure 2 is a vertical cross-sectional view of the tank body prototype made by injection molding, Figure 3 is a vertical cross-sectional view of the tank body prototype and mold in blow molding, and Figure 4 is the tank body after blow molding. FIG.

第２図において、１０はインジエクシヨン成型
されたタンク本体の原型であり、長手方向両端部
に肉厚部１１と中間部に肉薄部１２とを有する、
一端が開口した合成樹脂よりなる筒体である。 In FIG. 2, reference numeral 10 is a model of a tank body which is injection molded, and has thick parts 11 at both ends in the longitudinal direction and a thin part 12 in the middle part.
It is a cylindrical body made of synthetic resin with one end open.

なお、開口側のフランジ１３は次のブロー成型
工程において、タンク本体原型１０を金型に把持
するために必要なものである。１４は閉端部であ
る。 Note that the flange 13 on the opening side is necessary for holding the tank body prototype 10 in a mold in the next blow molding process. 14 is a closed end.

第３図において、２０は二分割型の金型であ
り、中空になつている側の内壁面に成型後のタン
ク本体外周部に対応してネジ部２１、ベローズ部
２２、胴部残部２３、およびジヨイント部２４の
形状をそれぞれ有している。２５は円筒の下端に
内径方向のフランジを形成したフランジ把持用の
金型、２６は圧縮空気供給孔２７を有する円筒状
の金型である。金型２６は金型２５の円筒部内に
挿入でき、その間にタンクのフランジ１３を密封
して挾持することができるよう構成されている。 In FIG. 3, 20 is a two-part mold, and the inner wall surface of the hollow side has a threaded part 21, a bellows part 22, a body remaining part 23, and the shape of the joint portion 24, respectively. Reference numeral 25 denotes a flange gripping mold in which a flange in the inner diameter direction is formed at the lower end of the cylinder, and 26 is a cylindrical mold having a compressed air supply hole 27. The mold 26 can be inserted into the cylindrical part of the mold 25, and the flange 13 of the tank can be tightly clamped therebetween.

いま第３図のように、タンク本体原型１０を金
型２０の上部開口部で挾持し、そのフランジ１３
を金型２５，２６で押圧・把持しながら、金型２
６の孔２７から圧縮空気Ａをタンク本体原型１０
の内側へ供給する。その結果、インジエクシヨン
成型直後の加熱軟化状態にあるタンク本体原型１
０は、その内側から圧力を加えられることになる
ので、膨張し、金型２０内壁面の形状に適合して
成型される。すなわち、原型１０の肉薄部１２が
ベローズ６として成型され、肉厚部１１がそれ以
外の部分に成型される。 Now, as shown in FIG. 3, the tank body prototype 10 is held between the upper opening of the mold 20 and its flange 13
While pressing and gripping with the molds 25 and 26, the mold 2
The compressed air A is supplied from the hole 27 of 6 to the tank body prototype 10.
Supply to the inside of. As a result, the tank body prototype 1 in a heated and softened state immediately after injection molding
Since pressure is applied from the inside of the mold 0, it expands and is molded to match the shape of the inner wall surface of the mold 20. That is, the thin wall portion 12 of the prototype 10 is molded as the bellows 6, and the thick wall portion 11 is molded on the other portions.

成型されたら圧縮空気Ａの供給を停止し、金型
２０，２５および２６を取りはずす。そして第４
図のように、閉端部１４を切断して開口したジヨ
イント部２とし、かつネジ部４の上から切断して
フランジ１３を切り離す。あとは、第１図のよう
にパツキン５を介してキヤツプ３をネジ部４に螺
合させれば、本発明の液体タンクとなる。 After the molding is completed, the supply of compressed air A is stopped and the molds 20, 25 and 26 are removed. and the fourth
As shown in the figure, the closed end portion 14 is cut to form the open joint portion 2, and the flange 13 is separated by cutting from above the threaded portion 4. All that is left to do is to screw the cap 3 onto the threaded portion 4 via the gasket 5 as shown in FIG. 1, thereby completing the liquid tank of the present invention.

なお、上記実施例はタンク本体１の胴部の一部
にベローズ６を形成させる場合であつたが、胴部
の全体をベローズ６に形成する場合も全く同様に
して製造することがでくる。 In the above embodiment, the bellows 6 is formed in a part of the body of the tank body 1, but the bellows 6 can be formed in the entire body in the same manner.

以上説明したように、本第一発明の液体タンク
はタンク本体の胴部の一部または全体がベローズ
に形成されてなるため、振動時あるいは高温時等
にタンク内の液体が揺動したり、また使用により
液面が下がろうとしても、その体積変化に応じて
ベローズが伸縮するため、常に液体を密封状態に
保ちながら、それらを吸収することができる。し
たがつて、タンクのキヤツプに特別な手段を施す
ことなく従来のような液漏れを防止することがで
きるので、その為の部品や加工を全く除去するこ
とができる。 As explained above, in the liquid tank of the first invention, a part or the entire body of the tank body is formed into a bellows, so that the liquid in the tank may oscillate during vibrations or high temperatures, etc. Furthermore, even if the liquid level tends to drop due to use, the bellows expands and contracts in response to the change in volume, making it possible to absorb liquid while always keeping it in a sealed state. Therefore, it is possible to prevent liquid leakage unlike the conventional method without applying any special measures to the tank cap, and therefore, it is possible to completely eliminate the need for parts and processing for this purpose.

また、本第二発明の液体タンクの製造方法は、
前記説明したような構成からなるため、ベローズ
がタンク本体の胴部の一部にある場合でも全体に
ある場合でも、容易に製造することができる。し
かも金型が反復使用できるので、大量生産が可能
である。 Further, the method for manufacturing a liquid tank according to the second invention includes:
Since the bellows is configured as described above, it can be easily manufactured regardless of whether the bellows is located in a part of the body of the tank body or in the entire body. Moreover, since the mold can be used repeatedly, mass production is possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例よりなる液体タン
クの縦断面図、第２図はインクジエクシヨン成型
によつて造られたタンク本体の原型の縦断面図、
第３図はブロー成型におけるタンク本体原型およ
び金型の縦断面図、および第４図はブロー成型後
のタンク本体の縦断面図である。 １……液体タンク本体、２……ジヨイント部、
３……キヤツプ、６……ベローズ、１０……タン
ク本体原型、２０，２５，２６……金型、２７…
…圧縮空気供給孔。 FIG. 1 is a vertical cross-sectional view of a liquid tank according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a prototype tank body made by inkjet extrusion molding,
FIG. 3 is a vertical sectional view of the tank body prototype and mold during blow molding, and FIG. 4 is a vertical sectional view of the tank body after blow molding. 1...Liquid tank body, 2...Joint part,
3... Cap, 6... Bellows, 10... Tank body prototype, 20, 25, 26... Mold, 27...
...Compressed air supply hole.

Claims (1)

【特許請求の範囲】 １ タンク本体の底部に開口したジヨイント部を
有し、頂部の開口部に着脱自在のキヤツプを有す
る液体タンクにおいて、タンク本体が合成樹脂で
一体的に成型され、かつ、タンク本体の胴部の一
部または全体がベローズに形成されてなることを
特徴とする液体タンク。 ２ 一端が開口した合成樹脂よりなる筒体を、長
手方向に肉厚部と肉薄部とを有するようにインジ
エクシヨン成型し、ついで該成型した筒体を金型
内に挿入してブロー成型し、前記肉薄部をベロー
ズに形成せしめ、かつ閉端部を開口せしめること
を特徴とする液体タンクの製造方法。[Scope of Claims] 1. A liquid tank having a joint portion opened at the bottom of the tank body and a removable cap at the opening at the top, wherein the tank body is integrally molded of synthetic resin, and A liquid tank characterized in that a part or the entire body of the main body is formed into a bellows. 2. A cylindrical body made of synthetic resin with one end open is injection molded so as to have a thick part and a thin part in the longitudinal direction, and then the molded cylindrical body is inserted into a mold and blow molded, and the above-mentioned A method for manufacturing a liquid tank, characterized in that a thin wall portion is formed into a bellows, and a closed end portion is opened.
JP56215299A 1981-12-30 1981-12-30 Liquid tank and manufacture thereof Granted JPS58118223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56215299A JPS58118223A (en) 1981-12-30 1981-12-30 Liquid tank and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56215299A JPS58118223A (en) 1981-12-30 1981-12-30 Liquid tank and manufacture thereof

Publications (2)

Publication Number Publication Date
JPS58118223A JPS58118223A (en) 1983-07-14
JPS6157183B2 true JPS6157183B2 (en) 1986-12-05

Family

ID=16670016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56215299A Granted JPS58118223A (en) 1981-12-30 1981-12-30 Liquid tank and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS58118223A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8499946B2 (en) 2006-12-15 2013-08-06 Playtex Products, Inc. Expandable preformed liners

Also Published As

Publication number Publication date
JPS58118223A (en) 1983-07-14

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