JPH04824B2 - - Google Patents

Info

Publication number
JPH04824B2
JPH04824B2 JP57047026A JP4702682A JPH04824B2 JP H04824 B2 JPH04824 B2 JP H04824B2 JP 57047026 A JP57047026 A JP 57047026A JP 4702682 A JP4702682 A JP 4702682A JP H04824 B2 JPH04824 B2 JP H04824B2
Authority
JP
Japan
Prior art keywords
flange
synthetic resin
container
edge
resin layer
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
JP57047026A
Other languages
English (en)
Other versions
JPS58163641A (ja
Inventor
Akira Hagiwara
Masaaki Masuda
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP57047026A priority Critical patent/JPS58163641A/ja
Publication of JPS58163641A publication Critical patent/JPS58163641A/ja
Publication of JPH04824B2 publication Critical patent/JPH04824B2/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
    • 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
    • B29C66/50—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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/34—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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped 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
    • B29C66/01—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
    • B29C66/70—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
    • B29C66/72327—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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types

Landscapes

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

Description

【発明の詳細な説明】 本発明は容器底部の成形方法および成形装置に
関する。
近年、紙コツプ等の、紙を素材とした容器が広
く用いられている。従来これ等の容器は、紙等の
素材を芯層に用い、該芯層の表裏両面に合成樹脂
層を積層してなる素材から、筒状の胴部と、該胴
部底部内面に嵌合する形状を有し且つ端部に鍔部
を一体的に設けてなる底面部を形成し、該胴部底
部内面に該底面部を嵌合して形成される容器の底
部下部内周面を、加熱空気あるいはバーナー等に
より加熱して、胴部の底部端縁部、底面部の鍔部
付近の合成樹脂層を溶融せしめ、次いで、上記底
部端縁部を折り曲げ用型によつて内方に折り曲げ
た後、圧着用型により、鍔部と、上記折り曲げ用
型により内方に折り曲げられた底部端縁部とを重
合させ且つこれを押圧して加熱溶融された合成樹
脂層を介して鍔部と胴部下部とを熱圧着し、胴部
と底面部とを一体成形して得られる。
しかしながら、上記の方法により容器底部の成
形を行なう場合、容器の底部下部内周面の加熱を
行なつた際に、熱伝導によつて、底部下部内周面
の樹脂層のみならず、胴部下部の外周面の樹脂層
をも溶融させてしまうため、折り曲げ用型や圧着
用型により押圧を加えると胴部下部の外周面付近
の溶融した合成樹脂が型に付着して芯層より剥離
し、容器が不良品として成形される。このため、
折り曲げ用型、圧着用型表面にテフロンコート等
の滑り対策を施したり、潤滑剤塗布を施す等の対
策を行なつているが、効果および耐久性の面で不
充分なものであつた。
本発明は上記の点に鑑みなされたもので、容器
底部の熱圧着強度を損なうことなく熱圧着工程に
おける樹脂層剥離による不良品を防止することが
できる容器底部の成形方法および成形装置を提供
することを目的とする。
即ち、本発明の１つは、芯層と該芯層の表裏両
面に積層された合成樹脂層とからなる素材にて、
筒状の胴部と、該胴部底部内面に嵌合する形状を
有し且つ端部に鍔部を一体的に設けてなる底面部
とを形成し、該胴部底部内面に該底面部を嵌合し
て形成された容器の底部下部内周面を加熱して胴
部の底部端縁部と底面部の鍔部の各合成樹脂層を
溶融せしめ、次いで胴部下部の外周面に冷却用気
体を吹付けて該胴部下部の外周面の合成樹脂層を
冷却すると共とも、上記胴部の底部端縁部を内方
に折り曲げた後、該端縁部と鍔部とを重合せしめ
且つ該重合部を押圧し、加熱溶融された合成樹脂
層を介して、鍔部と胴部下部とを熱圧着して胴部
と底面部とを一体成形することを特徴とする容器
底部の成形方法を要旨とする。本発明のいま１つ
は、芯層と該芯層の表裏両面に積層された合成樹
脂層とからなる素材にて形成された筒状の胴部底
部内面に該胴部底部内面に嵌合する形状を有し且
つ端部に鍔部を一体的に設けてなり、上記素材に
て形成された底面部を嵌合して形成された容器の
底部下部内周面を加熱して胴部の底部端縁部と底
面部の顎部の各合成樹脂層を溶融せしめるための
加熱手段と、胴部の端縁部を内方に折り曲げるた
めの折り曲げ用型と、該折り曲げ用型に設けら
れ、胴部下部の外周面に冷却用気体を吹付ける冷
却気体供給口を備えてなる冷却管と、鍔部と上記
内方に折り曲げられた底部端縁部とを重合させ且
つこれを押圧して、加熱溶融された合成樹脂層を
介して鍔部と胴部と胴部下部とを熱圧着するため
の圧着用型とからなることを特徴とする容器底部
の成形装置を要旨とする。
以下、本発明の実施例を図面に基き説明する。
第１図〜第４図は、本発明により断面円形状の
容器底部を成形する工程の１例を示すものであ
り、第１図は容器１を筒状の胴部２に底面部３を
嵌合して形成した状態を示し、４は胴部２の底部
端縁部、５は底面部３の端部に一体的に設けられ
た鍔部、６は口部である。胴部２と底面部３の嵌
合により形成された容器１の底部は底面部３によ
り底部下部７ａと底部上部７ｂとに分割される。
胴部２および底面部３は芯層８の表裏両面に合成
樹脂層９，９′，１０，１０′を積層してなる素材
により構成されている。
第２図は、第１図に示す容器１の底部下部内周
面１１（底部端縁部と鍔部とによつて構成される
容器底部下部の内側周面）に熱風供給管１２の熱
風供給口１３により熱風を供給する工程を示すも
ので熱風加熱により底部下部内周面１１の合成樹
脂層９a′，１０a′が溶融される。この際熱伝導に
より鍔部５の外周面と該鍔部５と当接する胴部２
の当接面の合成樹脂層１０ａ，９b′および胴部下
部１４の外周面付近の合成樹脂層９ａも同時に溶
融される。第３図は胴部下部の外周面を冷却する
と共に底部端縁部を内方に折り曲げる工程を示す
要部縦断面図である。次いで第３図に示すように
折り曲げ用型１５が矢印Ａ方向に降下し、該折り
曲げ用型１５の下部に設けられた冷却管１６の冷
却気体供給口１７より冷却用気体を吹付け、胴部
下部１４の外周面の合成樹脂層９ａを冷却すると
共に、該折り曲げ用型１５の降下に伴つて、底部
端縁部４が該折り曲げ用型１５に設けられた凹部
１８にガイドされて内方に折り曲げられる。鍔部
５と上記内方に折り曲げられた底部端縁部４とは
圧着用型１９によつて重合され且つ該重合部は該
圧着用型１９により押厚され鍔部５と胴部下部１
４とが鍔部５内周面と底部端縁部４内周面および
鍔部５外周面と該鍔部５と当接する胴部２の当接
面の合成樹脂層９a′，１０a′および９b′，１０ａ
を介して熱圧着される（第４図）圧着用型１９は
例えば第４図に示すように、端部押圧型２０、外
側部押圧型２１、内側部押圧型２２から構成さ
れ、内側部押圧型２２は軸２３と、該軸２３に対
し回転自在に設けられた回転ローラー２４とから
構成される。また外側部押圧型２１には必要によ
り冷却水循環孔２５が設けられる。内側部押圧型
２２は回転ローラー２４によつて底部端縁部４と
鍔部５とを重合せしめ且つ該重合部を押圧すると
共に軸２３が容器１の中心線（便宜上、該中心線
を一点鎖線で示す）を中心に回転し、軸２３の回
転に伴つて、底部端縁部４と鍔部５の回転ローラ
ー２４により重合、押圧される位置が順次移動し
て熱圧着が行なわれ、胴部２と底面部３とが一体
に成形されるが、圧着用型１９は底部端縁部４と
鍔部５とを重合せしめ、且つ該重合部を押圧して
鍔部５と胴部下部１４との熱圧着が行なわれるよ
う構成されていれば良く、本実施例の圧着用型１
９の構成、作用において限定されるものではな
い。
以上説明したように本発明方法は筒状の胴部
と、該胴部に嵌合する形状を有し且つ端部に鍔部
を一体的に設けてなる底面部とを嵌合して形成さ
れる容器底部下部内周面を加熱して胴部の端縁部
と底面部の鍔部の各合成樹脂層を溶融せしめた
後、胴部下部の外周面に冷却用気体を吹付けて該
胴部下部の外周面の合成樹脂層を冷却すると共
に、胴部の底部端縁部を内方に折り曲げる方法を
採用し、且つ本発明装置はそのための構成を備え
ているから、底部端縁部の折り曲げ時や、該底部
端縁部を折り曲げた後、底部端縁部と鍔部とを重
合せしめ且つ該重合部を押圧して加熱溶融された
合成樹脂層を介して鍔部と胴部下部とを熱圧着す
る際に胴部下部の外周面側の合成樹脂層の剥離を
防止することができ、合成樹脂層の剥離による不
良容器の発生を防止できる効果がある。又、胴部
下部外周の冷却を冷却用気体により行う（冷却用
気体を供給する冷却管を備えている）ことによ
り、冷却装置と合成樹脂層が直接接触しないの
で、溶融状態の合成樹脂が冷却装置に付着するこ
とを防止できるため、容器外観の変形や合成樹脂
層の芯材からの剥離が起こつて不良品が発生する
虞れがない。
また胴部下部の外周面の冷却を行なうと共に底
部端縁部の折り曲げを行なうことにより冷却用気
体の供給時間は短く、従つて胴部下部の外周面側
の合成樹脂層のみが冷却され、底部下部内周面側
の合成樹脂層の温度は低下しないため、容器底部
の熱圧着強度が損われない利点を有する。
【図面の簡単な説明】
図面は本発明の実施例を示すもので第１図は胴
部に底面部を嵌合して形成した容器の縦断面図、
第２図は第１図の容器の底部下部内周面の加熱工
程を示す要部縦断面図、第３図は胴部下部の外周
面を冷却すると共に底部端縁部を内方に折り曲げ
る工程を示す要部縦断面図、第４図は底部端縁部
と鍔部とを重合させ且つ該重合部を押圧し鍔部と
胴部下部とを熱圧着する工程を示す要部縦断面図
である。 １……容器、２……胴部、３……底面部、４…
…底部端縁部、５……鍔部、８……芯層、９，
９′，１０，１０′……合成樹脂層、１１……底部
下部内周面、１２……熱風供給管、１４……胴部
下部、１５……折り曲げ用型、１６……冷却管、
１７……冷却気体供給口、１９……圧着用型。

Claims (1)

  1. 【特許請求の範囲】 １ 芯層と該芯層の表裏両面に積層された合成樹
    脂層とからなる素材にて、筒状の胴部と、該胴部
    底部内面に嵌合する形状を有し且つ端部に鍔部を
    一体的に設けてなる底面部とを形成し、該胴部底
    部内面に該底面部を嵌合して形成された容器の底
    部下部内周面を加熱して胴部の底部端縁部と底面
    部の鍔部の各合成樹脂層を溶融せしめ、次いで胴
    部下部の外周面に冷却用気体を吹付けて該胴部下
    部の外周面の合成樹脂層を冷却すると共に、上記
    胴部の底部端縁部を内方に折り曲げた後、該端縁
    部と鍔部とを重合せしめ且つ該重合部を押圧し、
    加熱溶融された合成樹脂層を介して鍔部と胴部下
    部とを熱圧着して胴部と底面部とを結合一体化す
    ることを特徴とする容器底部の成形方法。 ２ 芯層と該芯層の表裏両面に積層された合成樹
    脂層とからなる素材にて形成された筒状の胴部底
    部内面に該胴部底部内面に嵌合する形状を有し且
    つ端部に鍔部を一体的に設けてなり、上記素材に
    て形成された底面部を嵌合して形成された容器の
    底部下部内周面を加熱して胴部の底部端縁部と底
    面部の鍔部の各合成樹脂層を溶融せしめるための
    加熱手段と、胴部の端縁部を内方に折り曲げるた
    めの折り曲げ用型と、該折り曲げ用型に設けら
    れ、胴部下部の外周面に冷却用気体を吹付ける冷
    却気体供給口を備えてなる冷却管と、鍔部と上記
    内方に折り曲げられた底部端縁部とを重合させ且
    つこれを押圧して加熱溶融された合成樹脂層を介
    して鍔部と胴部と胴部下部とを熱圧着するための
    圧着用型とからなることを特徴とする容器底部の
    成形装置。
JP57047026A 1982-03-24 1982-03-24 容器底部の成形方法および成形装置 Granted JPS58163641A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57047026A JPS58163641A (ja) 1982-03-24 1982-03-24 容器底部の成形方法および成形装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57047026A JPS58163641A (ja) 1982-03-24 1982-03-24 容器底部の成形方法および成形装置

Publications (2)

Publication Number Publication Date
JPS58163641A JPS58163641A (ja) 1983-09-28
JPH04824B2 true JPH04824B2 (ja) 1992-01-08

Family

ID=12763658

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JPS58163641A (ja)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3704008B2 (ja) 1999-10-14 2005-10-05 株式会社トップ 合成樹脂製部材との接合方法
DE102014210961A1 (de) 2014-06-06 2015-12-17 Michael Hörauf Maschinenfabrik Gmbh U. Co. Kg Verfahren und Vorrichtung zum Herstellen eines Bechers
JP2021095215A (ja) * 2019-12-16 2021-06-24 昭和電工パッケージング株式会社 コップ状容器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741122Y2 (ja) * 1978-01-23 1982-09-09
JPS56157339A (en) * 1980-05-10 1981-12-04 Dainippon Printing Co Ltd Method of sealing bottom edge section of paper vessel

Also Published As

Publication number Publication date
JPS58163641A (ja) 1983-09-28

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