JPH0320334B2 - - Google Patents

Info

Publication number
JPH0320334B2
JPH0320334B2 JP58154533A JP15453383A JPH0320334B2 JP H0320334 B2 JPH0320334 B2 JP H0320334B2 JP 58154533 A JP58154533 A JP 58154533A JP 15453383 A JP15453383 A JP 15453383A JP H0320334 B2 JPH0320334 B2 JP H0320334B2
Authority
JP
Japan
Prior art keywords
plastic
double
melt adhesive
cap
hot melt
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 - Lifetime
Application number
JP58154533A
Other languages
Japanese (ja)
Other versions
JPS6046228A (en
Inventor
Yoshihisa Hama
Tatsu Akashi
Tatsuo Shimura
Sukeyoshi Wakamya
Naokazu Takeuchi
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.)
Mitsubishi Heavy Industries Ltd
Toyobo Co Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Toyobo Co 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 Mitsubishi Heavy Industries Ltd, Toyobo Co Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP58154533A priority Critical patent/JPS6046228A/en
Publication of JPS6046228A publication Critical patent/JPS6046228A/en
Publication of JPH0320334B2 publication Critical patent/JPH0320334B2/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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • 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
    • 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
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • B29C66/1352—Single hem to hem joints
    • 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
    • B29C66/545—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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B65D15/02—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums
    • B65D15/16—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material
    • B65D15/18—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials of curved, or partially curved, cross-section, e.g. cans, drums with curved, or partially curved, walls made of plastics material with end walls made of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/12—Rim rolling
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent a cap from being removed by a method wherein the double-seaming part of a plastic can body is closed through hot melt adhesive agent and then the double-seaming part is induction-heated in high frequency to stick the plastic can body to the metallic cap. CONSTITUTION:When a stretchable metallic cap is double-seamed in opening part of a plastic can body, a hot melt adhesive part is intervened in the double- seaming part and sealed, then, this sealed part is heated by high frequency induction to stick the plastic can body to the metallic cap. The hot melt adhesive layer 5 is provided on the inside of the cap hook part 1a of the periphery of the metallic cap 1. The cap hook part 1a of the metallic cap 1 and the flange part 2b of the can body 2 are double-seamed, then, the said part only is heated rapidly by the high frequency induction heater 6 up to the softening temperature of hot melt adhesive agent. When the metallic cap is double-seamed at the opening part of the plastic can body, the hot melt adhesive agent is intervened in the doube-seamed part and said part is heated by high frequency induction and stuck to prevent the cap from being removed.

Description

【発明の詳細な説明】 この発明は、金属蓋付きプラスチツク容器の製
造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing plastic containers with metal lids.

アルミニウム缶は、気密性、缶強度等の優れた
性能を有しているため、各種飲料容器として広く
使用されているが、原材料が高価であり、容器が
不透明で内容物が外から見えない等の不具合があ
る。この不具合を解消するために、筒状のプラス
チツク容器の開口部に、アルミニウムなどの延展
性の金属蓋を装着したものが提案されている。プ
ラスチツク容器開口部に金属蓋を装着するには、
アルミニウム缶、スチール缶などで従来行なわれ
ている二重巻締め法が適用できるが、プラスチツ
ク材料は金属材料に比べて弾性率が小さく、炭酸
飲料を充填したときのように内圧が常時かかるも
のでは、内圧の応力によつて巻締め部の容器本体
の厚み方向の歪は、金属缶体の厚み方向の歪より
大きい。そのため従来の二重巻締め法では、巻締
め部から缶体がすり抜けて金属蓋が外れる事故が
多発する。 Aluminum cans have excellent properties such as airtightness and can strength, so they are widely used as containers for various beverages, but the raw materials are expensive and the containers are opaque, making the contents difficult to see from the outside. There is a problem with this. In order to solve this problem, it has been proposed to attach a flexible metal lid such as aluminum to the opening of a cylindrical plastic container. To fit a metal lid onto a plastic container opening,
The double seaming method conventionally used for aluminum cans, steel cans, etc. can be applied, but plastic materials have a lower elastic modulus than metal materials, and cannot be used in cases where internal pressure is constantly applied, such as when filling carbonated beverages. The strain in the thickness direction of the container body at the seaming portion due to the stress of the internal pressure is greater than the strain in the thickness direction of the metal can body. Therefore, in the conventional double seaming method, there are many accidents where the can body slips through the seam and the metal lid comes off.

これらの問題を解決するために、巻締め部に接
着剤を使用することが提案されているが、従来提
案の方法では二重巻締め装置が利用しにくく、ま
た十分な接着速度が得られず実用的でない。 In order to solve these problems, it has been proposed to use adhesive in the seaming part, but with the conventionally proposed method, it is difficult to use a double seaming device, and a sufficient bonding speed cannot be obtained. Not practical.

本発明者らは上記の問題を解決すべく鋭意研究
した結果、缶体のすり抜けがなくなり、かつシー
ル性の低下のない金属蓋付きプラスチツク容器の
迅速な製造法を発明したのである。 As a result of intensive research aimed at solving the above-mentioned problems, the inventors of the present invention have invented a method for rapidly manufacturing plastic containers with metal lids that eliminates the possibility of the can body slipping through and does not reduce sealing performance.

すなわちこの発明は、プラスチツク缶体の開口
部に延展性金属蓋を巻締めするに際し、巻締め部
にホツトメルト接着剤を介在させて巻締めしたの
ち、この巻締め部を高周波誘導加熱してプラスチ
ツク缶体と金属蓋を接着することを特徴とする金
属蓋付きプラスチツク容器の製造法である。 That is, in this invention, when a ductile metal lid is crimped to the opening of a plastic can body, the crimped part is cinched with hot melt adhesive, and then the crimped part is heated by high frequency induction to form a plastic can. This is a method for manufacturing a plastic container with a metal lid, characterized by bonding the body and the metal lid.

この発明を図面によつて説明すると、第１図は
従来の方法による二重巻締めの一部断面図を示
し、１は金属蓋、２はプラスチツク缶体にして、
金属蓋１の外周縁部のカバーフツク部１ａと缶体
２の上縁部のボデイフツク部２ａとが二重巻締め
され、カバーフツク部１ａの上方にアツパークリ
アランス３が、またボデイフツク部２ａの下方に
ロワークリアランス４がそれぞれ形成されてい
る。 To explain this invention with reference to the drawings, FIG. 1 shows a partial sectional view of double seaming according to the conventional method, in which 1 is a metal lid, 2 is a plastic can body,
The cover hook portion 1a on the outer peripheral edge of the metal lid 1 and the body hook portion 2a on the upper edge of the can body 2 are double-sealed, and an upper clearance 3 is provided above the cover hook portion 1a, and an upper clearance 3 is provided below the body hook portion 2a. Lower clearances 4 are formed respectively.

第２図はこの発明の巻締め法を説明する一部断
面を示し、巻締め前の金属蓋１の周縁のカバーフ
ツク部１ａ内面にホツトメルト接着剤層５を設け
る。２ｂは缶体２の上縁部を外側に折曲げて形成
された巻締め前の状態のフランジである。 FIG. 2 shows a partial cross section for explaining the seaming method of the present invention, and a hot melt adhesive layer 5 is provided on the inner surface of the cover hook portion 1a at the periphery of the metal lid 1 before seaming. 2b is a flange which is formed by bending the upper edge of the can body 2 outward and is in a state before being tightened.

第３図は第２図の金属蓋１のカバーフツク部１
ａと缶体２のフランジ２ｂとを二重巻締めした断
面図であり、二重巻締め後、外方に近接して設け
た高周波誘導加熱装置６で巻締め部のみが、ホツ
トメルト接着剤が軟化される温度にまで急速に加
熱される。 Figure 3 shows the cover hook part 1 of the metal lid 1 in Figure 2.
This is a cross-sectional view of the flange 2b of the can body 2 which is double-sealed. It is rapidly heated to a softening temperature.

ホツトメルト接着剤は、金属蓋のカバーフツク
部または缶体のフランジのいずれに塗布してもよ
く、またホツトメルト接着剤をあらかじめフイル
ム状としてこのフイルムを巻締め時に挾み込むこ
とも可能である。ホツトメルト接着剤としては、
缶体を構成するプラスチツクの融点より低い温度
で軟化するものであれば、エチレン・酢酸ビニル
共重合体系、ポリエステル系、ポリアミド系のい
ずれもが使用できる。特に好ましいのは、缶体を
構成するプラスチツクの構成単位を主体とした共
重合体であり、また少量のイオン性基を含有する
成分を共重合したものでもよい。巻締め後に高周
波誘導加熱することにより、接着剤は短時間で軟
化され、この加熱によつて缶体は損傷を受けな
い。 The hot-melt adhesive may be applied to either the cover hook portion of the metal lid or the flange of the can body, and it is also possible to form the hot-melt adhesive into a film in advance and sandwich this film during winding. As a hot melt adhesive,
Any of ethylene/vinyl acetate copolymer, polyester, and polyamide can be used as long as it softens at a temperature lower than the melting point of the plastic that makes up the can body. Particularly preferred is a copolymer mainly composed of the plastic structural units constituting the can body, or a copolymer containing a component containing a small amount of ionic group may be used. By applying high-frequency induction heating after seaming, the adhesive is softened in a short time, and the can body is not damaged by this heating.

高周波誘導加熱装置は、100KHz以上の高周波
発生のものであり、高周波誘導コイルはリング状
のものが好適であるが、その他長円リング状、矩
形状、板状のものでもよい。 The high-frequency induction heating device is one that generates a high frequency of 100 KHz or more, and the high-frequency induction coil is preferably ring-shaped, but may also be oval ring-shaped, rectangular, or plate-shaped.

この発明に使用されるプラスチツク材料は、ポ
リエチレン、ポリプロピレン、耐衝撃性ポリスチ
レン、ポリカーボネート、ポリエステルなどの熱
可塑性樹脂であるが、特に好ましいのは、エチレ
ンテレフタレートを主成分とするポリエチレンテ
レフタレートであり、テレフタル酸又はそのエス
テル形成誘導体とエチレングリコールとから得ら
れる熱可塑性ポリエステルである。 The plastic material used in this invention is a thermoplastic resin such as polyethylene, polypropylene, high-impact polystyrene, polycarbonate, or polyester, but particularly preferred is polyethylene terephthalate whose main component is ethylene terephthalate, or a thermoplastic polyester obtained from an ester-forming derivative thereof and ethylene glycol.

プラスチツク缶体を製造するには、原料の熱可
塑性樹脂を押出成形機の所定形状のダイスより溶
融押出して成形する。容器本体に透明性を特にも
たせようとする場合は、溶融押出したパイプを、
常温以下に冷却させてパイプ形状を規制するため
のサイザで急冷して非晶質パイプとして成形す
る。また容器本体の機械的強度を増大しようとす
る場合には、押出し成形したパイプをガラス転移
点以上、150℃以下の延伸適温に加熱して一軸ま
たは二軸延伸する。さらに容器本体が高温液体充
填や高温殺菌などの高温に耐えるようにする場合
は、上記延伸したパイプを緊張下で熱固定操作を
加える。 To manufacture a plastic can body, a thermoplastic resin as a raw material is melt-extruded and molded through a die of a predetermined shape in an extrusion molding machine. If you want to make the container body particularly transparent, use a melt-extruded pipe.
The material is cooled to below room temperature and rapidly cooled using a sizer to control the shape of the pipe, forming an amorphous pipe. In addition, when it is desired to increase the mechanical strength of the container body, the extruded pipe is heated to a temperature suitable for stretching, above the glass transition point and below 150° C., and then uniaxially or biaxially stretched. Furthermore, if the container body is to withstand high temperatures such as filling with high-temperature liquid or high-temperature sterilization, the stretched pipe is heat-set under tension.

上記のようにこの発明における容器本体は、溶
融押出し後の加工条件を変更することによつて、
任意の性能が得られる。また、未延伸もしくは低
延伸のシートを真空成形、圧空成形などによつて
深絞りして得られる有底容器の巻締めに適用する
こともできる。 As mentioned above, the container body of the present invention can be produced by changing the processing conditions after melt extrusion.
Any performance can be obtained. It can also be applied to the seaming of bottomed containers obtained by deep drawing an unstretched or low-stretched sheet by vacuum forming, pressure forming, or the like.

金属蓋の材料は、延展性を有するもので、アル
ミニウムのほかに、ブリキ、プラスチツクを積層
又は塗布した金属などである。 The material of the metal lid is ductile, and includes aluminum, tinplate, metal laminated or coated with plastic, and the like.

以下にこの発明の実施例を説明する。 Examples of the present invention will be described below.

実施例 固有粘度0.75（フエノール／テトラクロロエタ
ン＝６／４重量比混合溶媒を用いて30℃にて測
定）のポリエチレンテレフタレートを275℃に溶
融し、パイプダイから押出して内径15.8mm、外径
17.7mmの管状に押出し、93℃、２Kg／cm2の加圧空
気でブロー延伸して周方向に３倍延伸して内径
52.4mm、外径53mmの延伸管を成形した。この延伸
を長さ140mmに切断し、次いで両端開口部にハン
ドプレス機を用いて100℃でフランジを熱成形し
た。あらかじめ、金属蓋のカバーフツク部に、ポ
リエステル共重合ホツトメルト接着剤（商品名
GM−400、東洋紡績社製）を塗布した厚み0.25
mmのアルミニウム蓋を缶体の両端開口部のフラン
ジに載せ、セミトロシーマー（半田工機社製）を
用いて順次巻締めした。続いて巻締め部上端から
コイル下端までの距離20mmに配置した高周波誘導
コイルに、250KHz、2.5KWの高周波電流を1.5秒
通電し、プラスチツク缶体を溶融変形させること
なく、ホツトメルト接着剤を軟化させたのち冷却
した。Example Polyethylene terephthalate with an intrinsic viscosity of 0.75 (measured at 30°C using a mixed solvent with a 6/4 weight ratio of phenol/tetrachloroethane) was melted at 275°C and extruded through a pipe die to form a mold with an inner diameter of 15.8 mm and an outer diameter.
Extruded into a 17.7mm tubular shape, blow-stretched at 93℃ with 2Kg/ cm2 pressurized air, and stretched 3 times in the circumferential direction to reduce the inner diameter.
A stretched tube with a diameter of 52.4 mm and an outer diameter of 53 mm was molded. This stretched product was cut into a length of 140 mm, and flanges were then thermoformed at 100° C. using a hand press machine at both end openings. Apply polyester copolymer hot melt adhesive (product name) to the cover hook of the metal lid in advance.
GM-400, manufactured by Toyobo Co., Ltd.) coated with a thickness of 0.25
mm aluminum lids were placed on the flanges at the openings at both ends of the can body, and were sequentially tightened using a semi-tro seamer (manufactured by Handa Koki Co., Ltd.). Next, a high-frequency current of 250 KHz and 2.5 KW was applied for 1.5 seconds to a high-frequency induction coil placed at a distance of 20 mm from the top end of the seaming part to the bottom end of the coil to soften the hot melt adhesive without melting and deforming the plastic can body. It was then cooled down.

なお比較例として、上記実施例において、アル
ミニウム蓋のカバーフツク部にホツトメルト接着
剤を塗布しないものを作成した。 As a comparative example, a product was prepared in which hot melt adhesive was not applied to the cover hook portion of the aluminum lid in the above example.

上記実施例および比較例のポリエステル容器の
それぞれ10個に5.0Kｇ／cm2の内圧をかけ、70℃
雰囲気中に放置したところ、実施例では24時間経
過しても金属蓋の外れたものは見られなかつた
が、比較例では10個のうち３個の金属蓋が外れ
た。 An internal pressure of 5.0 kg/cm 2 was applied to 10 of the polyester containers of the above examples and comparative examples, and the temperature was 70°C.
When left in an atmosphere, in the example, no metal lids were observed to come off even after 24 hours, but in the comparative example, 3 out of 10 metal lids came off.

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

第１図は従来の巻締め部の構造の一部を示す断
面図、第２図はこの発明の方法を実施する中途の
構造の一部を示す断面図、第３図は高周波誘導加
熱コイルを有する巻締め部の構造を示す断面図で
ある。 １：金属蓋、１ａ：カバーフツク部、２：プラ
スチツク缶体、２ｂ：フランジ、３：巻締め部、
５：ホツトメルト接着剤層、６：高周波誘導加熱
コイル。 Fig. 1 is a cross-sectional view showing a part of the structure of a conventional seaming part, Fig. 2 is a cross-sectional view showing a part of an intermediate structure for implementing the method of the present invention, and Fig. 3 is a cross-sectional view showing a part of the structure of a high-frequency induction heating coil. FIG. 1: Metal lid, 1a: Cover hook part, 2: Plastic can body, 2b: Flange, 3: Sealing part,
5: Hot melt adhesive layer, 6: High frequency induction heating coil.

Claims (1)

【特許請求の範囲】[Claims] １ プラスチツク缶体の開口部に延展性金属蓋を
巻締めするに際し、巻締め部にホツトメルト接着
剤を介在させて巻締めしたのち、この巻締め部を
高周波誘導加熱してプラスチツク缶体と金属蓋を
接着することを特徴とする金属蓋付きプラスチツ
ク容器の製造法。1. When crimping a ductile metal lid to the opening of a plastic can body, hot melt adhesive is interposed in the crimped part and then the crimped part is heated by high-frequency induction to seal the plastic can body and metal lid. A method for manufacturing a plastic container with a metal lid, characterized by bonding.
JP58154533A 1983-08-23 1983-08-23 Preparation of plastic container with metallic cap Granted JPS6046228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58154533A JPS6046228A (en) 1983-08-23 1983-08-23 Preparation of plastic container with metallic cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58154533A JPS6046228A (en) 1983-08-23 1983-08-23 Preparation of plastic container with metallic cap

Publications (2)

Publication Number Publication Date
JPS6046228A JPS6046228A (en) 1985-03-13
JPH0320334B2 true JPH0320334B2 (en) 1991-03-19

Family

ID=15586334

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58154533A Granted JPS6046228A (en) 1983-08-23 1983-08-23 Preparation of plastic container with metallic cap

Country Status (1)

Country Link
JP (1) JPS6046228A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419749U (en) * 1987-07-25 1989-01-31

Also Published As

Publication number Publication date
JPS6046228A (en) 1985-03-13

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