JPS60232939A - 熱可塑性樹脂による二重壁弁当箱の製造法 - Google Patents

熱可塑性樹脂による二重壁弁当箱の製造法

Info

Publication number
JPS60232939A
JPS60232939A JP59089650A JP8965084A JPS60232939A JP S60232939 A JPS60232939 A JP S60232939A JP 59089650 A JP59089650 A JP 59089650A JP 8965084 A JP8965084 A JP 8965084A JP S60232939 A JPS60232939 A JP S60232939A
Authority
JP
Japan
Prior art keywords
box
shell
flange
shells
brim
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
Application number
JP59089650A
Other languages
English (en)
Inventor
Masataka Hibi
日比　正隆
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.)
OOGAKI PLAST KOGYO KK
Original Assignee
OOGAKI PLAST KOGYO KK
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 OOGAKI PLAST KOGYO KK filed Critical OOGAKI PLAST KOGYO KK
Priority to JP59089650A priority Critical patent/JPS60232939A/ja
Publication of JPS60232939A publication Critical patent/JPS60232939A/ja
Pending 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
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/004—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore making articles by joining parts moulded in separate cavities, said parts being in said separate cavities during said joining
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B29C2045/14524—Joining articles or parts of a single article making hollow 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14868—Pretreatment of the insert, e.g. etching, cleaning
    • B29C2045/14877—Pretreatment of the insert, e.g. etching, cleaning preheating or precooling the insert for non-deforming purposes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Molding Of Porous Articles (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は熱可塑性樹脂による二重壁弁当箱の製造に於て
、適温に予熱した外箱と内箱を、夫々適温に加温した上
金型と下金型より成る合せ金型内に挿嵌して両金型を重
合し、内箱と外箱の鉤部外側局面と、上下金型との間隙
に樹脂を射出注入して内箱と外箱の接合部を融合黴着す
る二重壁弁当箱の製造法に関するものである。
従来収容食品保温用の二重壁弁当箱は、ポリエチレン、
ポリプロ２７７等熱可塑性のポリ系樹脂によシ容器の内
箱と外箱を射出成形により別々に製作し、両者を接着剤
によシ接合するか、又は超旨波や熱線を利用する溶着等
によって接合しているが、接着剤による接合方法は、接
合前に接合部表向の有機物の除去などのため、研摩脱脂
による機械的方法、又は薬剤処理等による化学的方法の
いづれかによって表面処理を行い、適正な表面とする作
業が必要であると共に、接着加工は主として手作業によ
って行われるので、熟練を要しかつ非常に手間が掛り、
又製品のバラツキが多い等の欠点があった。
又超音波や熱線を利用する接着法では、完全接合が困難
で、＝１Ｌ壁間の気密を確実に保持することはむづかし
く、洗滌、煮Ｒ消毒を繰返し行う弁当箱専の食品容器に
使用することは出来なかった。
本発明はこれ等の欠点を解消する二本壁弁当箱の製造法
に係るもので、その方法を図に示す実施例によって説明
すると、第１図よシ上方が開口する容器本体の外箱（１
）は、側周壁部（２）と底壁部（８）によ）箱形とし、
該側周壁部（２）の上端周縁が外向状鍔部（４）をなす
如くポリエチレン、ポリプロピレン等の熱可塑性樹脂材
の射出成形によυ一体に形成する。
第２図よシ上方が開口する容器本体の内箱（６）は、外
側周縁部が外箱（１）の鍔部（４）の上面に一致して接
面する如く外側壁部（６）の先端部゛を外向状鍔部（７
）とし、外側壁部（６）の上方を逆Ｕ字形に屈曲して内
箱上壁部（８）を形成し、その内側壁部（９）を下方に
延長して内方に屈曲し内箱底壁部ａＱをなす如く、外箱
（１）と同一材により射出成形により一体に成形し、内
側壁部（９）と底壁部αＱによシ形成される空間部を食
品収容槽ａηとし、第８図の如く、外箱（１）内に内箱
（５）を挿入して鍔部（４）と（７）を重ねた状態で、
外箱（１）と内箱（５）間に形成される空間部を保温材
充填室（６）とするもので、内箱（５）と外箱（１）の
夫々を保温器停によ９８０°Ｃ乃至９０℃に予熱し内蔵
した熱線σ功、員によシ接合部周辺を９０℃乃至１００
°Ｃに加熱した上金型α少及び下金型（至）内に、保温
材充填室（６）の内壁面を除き内箱（５）と外箱（１）
の外周面が接面し、鍔部（７）、（４）の外側周面Ｑ７
）、αＱと帯輪状に若干の間１ｆｉ　（ｔ）、（１）を
有する如く挿嵌して、第４図の如く上金型σ→と下金型
（ト）を重ねて圧接し、前記の間隙（ｔ）、（局によっ
て形成される接合空間部ａ均に、上金型αく又は下金型
（至）の適所に設けた湯口α呻、０・・・・高温の樹脂
を射出注入して鍔部（７）、（４）の外側局面αＱ、α
ηを一体に融合接着（ホ）し、冷却後説型して二重壁弁
当箱容器本体を製作し、蓋体（財）を着脱自在に被蓋す
るものでおる。
尚保温材充填室（２）内にウレタン等の断熱材（財）を
収納するには、内外箱（５）、（１）の容着前に該充填
室＠内に断熱材（イ）を収納しておくか、又は溶着後外
箱（１）の底壁部（３）の適所に注入口を設けて断熱用
樹脂材を注入し、該充填室０→内で発泡させて充填し、
注入口を塞いで後該部の表面を仕上げする。
次に本発明の効果について説明すると、生活水準の向上
に伴い、給食用の保温用二重壁弁当箱は、従来の如く全
体が同一色のものは喜ばれず、色彩的に変化のある多色
容器が要求されるようになったが、個々に製作された容
器の部分（例えば実施例による内箱と外箱等）は接着が
容易でなく、かつコスＦ高になると共に、完全接着が困
難で、弁当箱の如く接合部よシ保温材収納室内に浸水し
たυ、又接合部より分離する等の欠点がちシ、接合方法
の改善が望まれていた。
本発明は、これ等の欠点を解消する二重壁弁当箱の製造
方法で特願昭５４−１７６８６号と比較し、接合部を適
温に加熱した上下金型と適温に予熱した内外箱の接合面
部に設けた間隙内に内外箱の成形温度よシ若干高温の樹
脂材を射出成形によシ注入して接合部を融合接着するこ
とにより、内外箱の１ｊｐ、着は従来に比し更に確実強
固に実施することが出来ると共に、内箱と外箱及び接着
部に夫々異色の樹脂材を使用すれば、多色の二重弁当箱
を製作出来る等の効果を有するもので、夾用上優れた効
果を有する発明である。
【図面の簡単な説明】
第１図、第２図は夫々本発明の一実施例による外箱及び
内箱の縦断面図、第８図は前記内箱と外箱を重ねた状態
の縦断面図、第４図は外箱、内箱を夫々上下金型に挿嵌
して重ね合わせた状態の作用図、第６図は本発明によシ
製造した二重壁弁当箱の一実施例を示す一部断面を表わ
す正面図である。 （１）　外　箱 （４）鍔部 （５）　内　箱 （７）鍔部 ｗ、ｄ熱線 α→　上金型 （至）下金型 １時　内箱の鍔部外側局面 ＣＡ′ｈ　外箱の鍔部外側局面 （至）　接合空間部 α呻　湯　口 （ホ）　融合接着部 （財）間　隙 一以上一 代理人　六　川　詔　勝翻六４侑 第４図 第５図

Claims (1)

  1. 【特許請求の範囲】 熱可塑性樹脂による二重壁弁当箱の製造において、上端
    周゛縁部を外方に若干突出する鍔部とした外箱と、外側
    周縁部を前記外箱の鍔部の上面に下面が接面する如く外
    方に突出する鍔部とした内箱を別々に一体成形して、夫
    々を適温（８０°Ｃ乃至９０℃）に予熱し、該外箱と内
    箱の夫々を、内設した熱線によシ接合部ヲ９０℃乃至１
    ００’Ｃに加熱した上金型、下金型内に外箱の開口部を
    除き外周面が接面し内外箱の鍔部の外側局面と若干の間
    隙を有する如く挿嵌して上下の金型を重ねて圧接し、前
    記間隙によって形成される帯輪状の接合空間部内に、上
    金型又は下金型の適所に設けた複数の湯口より、内外箱
    と同一材料で、該箱の成形温度よシ若千（８０℃乃至４
    ０°Ｃ）゛高い温度の熱可塑性樹脂を射出注入して、鍔
    部の１１ＩＬ２ 外側局面に融合接着し、外箱と内箱を一体化することを
    特徴とする熱可塑性樹脂による二重壁弁当箱の製造法、
JP59089650A 1984-05-04 1984-05-04 熱可塑性樹脂による二重壁弁当箱の製造法 Pending JPS60232939A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59089650A JPS60232939A (ja) 1984-05-04 1984-05-04 熱可塑性樹脂による二重壁弁当箱の製造法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59089650A JPS60232939A (ja) 1984-05-04 1984-05-04 熱可塑性樹脂による二重壁弁当箱の製造法

Publications (1)

Publication Number Publication Date
JPS60232939A true JPS60232939A (ja) 1985-11-19

Family

ID=13976636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59089650A Pending JPS60232939A (ja) 1984-05-04 1984-05-04 熱可塑性樹脂による二重壁弁当箱の製造法

Country Status (1)

Country Link
JP (1) JPS60232939A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0755774A3 (en) * 1995-07-28 1997-02-05 FIAT AUTO S.p.A. Method and apparatus for producing structural parts made of plastics material
WO2006064057A2 (en) * 2004-12-16 2006-06-22 Inergy Automotive Systems Research (Société Anonyme) Process and apparatus for the manufacture of a multilayer hollow body that includes at least one weld
JP2007022626A (ja) * 2005-07-21 2007-02-01 Tada Plastic Kogyo Kk クーラーボックス及びその製法
CN112261184A (zh) * 2020-10-21 2021-01-22 上海龙旗科技股份有限公司 壳体抛光整形方法、外壳及电子产品
CN112606447A (zh) * 2020-12-04 2021-04-06 顾超 一种可降解环保塑料餐盒制作加工方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50108374A (ja) * 1974-02-01 1975-08-26
JPS5595518A (en) * 1979-01-12 1980-07-19 Sekisui Plastics Co Ltd Manufacture of double plastic hollow product
JPS5634438A (en) * 1979-08-31 1981-04-06 Dainippon Printing Co Ltd Preparation of ping-pong ball

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50108374A (ja) * 1974-02-01 1975-08-26
JPS5595518A (en) * 1979-01-12 1980-07-19 Sekisui Plastics Co Ltd Manufacture of double plastic hollow product
JPS5634438A (en) * 1979-08-31 1981-04-06 Dainippon Printing Co Ltd Preparation of ping-pong ball

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0755774A3 (en) * 1995-07-28 1997-02-05 FIAT AUTO S.p.A. Method and apparatus for producing structural parts made of plastics material
WO2006064057A2 (en) * 2004-12-16 2006-06-22 Inergy Automotive Systems Research (Société Anonyme) Process and apparatus for the manufacture of a multilayer hollow body that includes at least one weld
FR2879494A1 (fr) * 2004-12-16 2006-06-23 Inergy Automotive Systems Res Procede pour la fabrication d'un corps creux multicouche comprenant au moins une soudure
WO2006064057A3 (en) * 2004-12-16 2006-11-30 Inergy Automotive Systems Res Process and apparatus for the manufacture of a multilayer hollow body that includes at least one weld
JP2007022626A (ja) * 2005-07-21 2007-02-01 Tada Plastic Kogyo Kk クーラーボックス及びその製法
CN112261184A (zh) * 2020-10-21 2021-01-22 上海龙旗科技股份有限公司 壳体抛光整形方法、外壳及电子产品
CN112606447A (zh) * 2020-12-04 2021-04-06 顾超 一种可降解环保塑料餐盒制作加工方法

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