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
Japanese (ja)
Other versions
JPS58163641A (en
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/en
Publication of JPS58163641A publication Critical patent/JPS58163641A/en
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。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for forming a container bottom.

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。 In recent years, containers made of paper, such as paper containers, have been widely used. Conventionally, these containers are made of a material that uses a material such as paper for the core layer and laminated synthetic resin layers on both the front and back sides of the core layer, and is made of a material that fits into the cylindrical body and the inner surface of the bottom of the body. A bottom part is formed by having a shape such that a flange is integrally provided at the end thereof, and the bottom part is fitted to the inner surface of the bottom part of the body to form a lower inner circumferential surface of the bottom part of the container, Heat with heated air or a burner, etc. to melt the bottom edge of the body and the synthetic resin layer near the flange of the bottom, and then bend the bottom edge inward using a bending mold. After that, the crimping mold overlaps the flange and the bottom edge bent inward by the bending mold, and presses the flange and the flange through the heated and melted synthetic resin layer. It is obtained by thermocompression bonding the lower part of the body and integrally molding the body and the bottom part.

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。 However, when forming the bottom of the container by the above method, when heating the inner peripheral surface of the lower part of the container, due to heat conduction, not only the resin layer on the inner peripheral surface of the lower part of the bottom but also the body This will also melt the resin layer on the outer circumferential surface of the lower part, so if pressure is applied with a bending die or crimping die, the molten synthetic resin near the outer circumferential surface of the lower part of the body will adhere to the mold and peel off from the core layer. , the container is molded as a defective product. For this reason,
Measures have been taken to prevent slippage, such as applying a Teflon coating to the surfaces of the bending mold and the crimping mold, or applying lubricant, but these have been insufficient in terms of effectiveness and durability.

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。 The present invention has been made in view of the above points, and provides a method and a molding apparatus for molding a container bottom, which can prevent defective products due to resin layer peeling during the thermocompression bonding process without impairing the thermocompression bonding strength of the container bottom. The purpose is to

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。 That is, one aspect of the present invention is a material consisting of a core layer and synthetic resin layers laminated on both the front and back surfaces of the core layer,
A cylindrical body and a bottom having a shape that fits into the inner surface of the bottom of the body and having a flange integrally provided at the end are formed, and the bottom is formed on the inner surface of the bottom of the body. The inner peripheral surface of the lower bottom of the container formed by fitting is heated to melt the synthetic resin layers of the bottom edge of the body and the flange of the bottom, and then a cooling layer is applied to the outer peripheral surface of the lower part of the body. The synthetic resin layer on the outer peripheral surface of the lower part of the body is cooled by blowing gas, and after the bottom edge of the body is bent inward, the edge and the flange are overlapped, and A method for forming a container bottom, which comprises pressing the polymerized portion and thermocompression-bonding the flange and the bottom of the body through a heated and melted synthetic resin layer to integrally mold the body and the bottom. The gist is: Another aspect of the present invention is to fit into the inner surface of the bottom of a cylindrical body formed of a material consisting of a core layer and synthetic resin layers laminated on both the front and back surfaces of the core layer. The bottom of the body is heated by heating the inner circumferential surface of the bottom of the container, which has a shape and has a flange integrally provided at the end, and is formed by fitting the bottom made of the above-mentioned material. a heating means for melting each synthetic resin layer of the edge part and the jaw part of the bottom part; a bending die for bending the edge part of the body part inward; A cooling pipe equipped with a cooling gas supply port that sprays cooling gas onto the outer circumferential surface of the lower part of the part, and a collar part and the above-mentioned inwardly bent bottom edge part are overlapped and pressed together to heat the part. The object of the present invention is to provide a molding device for the bottom of a container, characterized by comprising a compression mold for thermocompression bonding a flange, a body, and a lower body through a molten synthetic resin layer.

以下、本発明の実施例を図面に基き説明する。 Embodiments of the present invention will be described below with reference to the drawings.

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。 1 to 4 show an example of the process of forming the bottom of a container having a circular cross section according to the present invention. FIG. 4 is the bottom edge of the body 2, 5 is a flange integrally provided at the end of the bottom 3, and 6 is a mouth. The bottom of the container 1 formed by fitting the body 2 and the bottom 3 is divided by the bottom 3 into a lower bottom 7a and an upper bottom 7b.
The body part 2 and the bottom part 3 are made of a material in which synthetic resin layers 9, 9', 10, and 10' are laminated on both the front and back surfaces of a core layer 8.

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。 FIG. 2 shows the supply of hot air from the hot air supply pipe 12 to the inner circumferential surface 11 of the lower bottom of the container 1 (the inner circumferential surface of the lower bottom of the container constituted by the bottom edge and the flange) shown in FIG. This shows a step of supplying hot air through the opening 13, in which the synthetic resin layers 9a' and 10a' on the lower inner peripheral surface 11 of the bottom part are melted by hot air heating. At this time, the outer peripheral surface of the flange 5 and the body 2 that comes into contact with the flange 5 due to heat conduction.
The synthetic resin layers 10a, 9b' on the abutting surfaces and the synthetic resin layer 9a near the outer peripheral surface of the lower body portion 14 are also melted at the same time. FIG. 3 is a vertical cross-sectional view of a main part showing a step of cooling the outer circumferential surface of the lower part of the body and bending the bottom edge inward. Next, as shown in FIG. 3, the bending die 15 descends in the direction of the arrow A, and cooling gas is blown from the cooling gas supply port 17 of the cooling pipe 16 provided at the lower part of the bending die 15 to cool the body. While cooling the synthetic resin layer 9a on the outer peripheral surface of the lower part 14, as the bending die 15 descends, the bottom edge 4 is guided inward by the recess 18 provided in the bending die 15. Can be bent. The flange 5 and the inwardly bent bottom edge 4 are overlapped by a crimping die 19, and the overlapping portion is pressed thickly by the crimping die 19 to form the flange 5 and the lower body portion 1.
4 and synthetic resin layers 9a', 10a', and 9b on the inner peripheral surface of the flange 5, the inner periphery of the bottom edge 4, the outer periphery of the flange 5, and the contact surface of the body 2 that contacts the flange 5. ', 10a
The crimping die 19 (FIG. 4) is composed of an end press die 20, an outer press die 21, and an inner press die 22, as shown in FIG. The mold 22 is composed of a shaft 23 and a rotary roller 24 rotatably provided with respect to the shaft 23. Further, cooling water circulation holes 25 are provided in the outer pressing mold 21 as necessary. The inner pressing mold 22 uses a rotating roller 24 to overlap the bottom edge 4 and the flange 5 and press the overlapped part, and a shaft 23 is attached to the center line of the container 1 (for convenience, the center line is drawn with a dashed line). As the shaft 23 rotates, the positions of the bottom edge 4 and the flange 5 where they are overlapped and pressed by the rotating roller 24 are sequentially moved to perform thermocompression bonding. 2 and the bottom part 3 are integrally molded, and the crimping mold 19 overlaps the bottom edge part 4 and the flange part 5, and presses the overlapping part to separate the flange part 5 and the lower body part 14. It suffices if the structure is such that the thermocompression bonding can be performed, and the compression mold 1 of this embodiment
The configuration and operation of 9 are not limited.

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。 As explained above, the method of the present invention is formed by fitting a cylindrical body part and a bottom part having a shape that fits into the body part and having a flange integrally provided at the end. After heating the inner circumferential surface of the lower part of the bottom of the container to melt the synthetic resin layers on the edge of the body and the flange of the bottom, cooling gas is sprayed onto the outer circumferential surface of the lower part of the body. Since the method of cooling the synthetic resin layer on the outer circumferential surface of the lower part and bending the bottom edge of the body inward, and the device of the present invention is equipped with a structure for this purpose, the bottom edge When folding or after bending the bottom edge, the bottom edge and the flange are overlapped and the overlapped area is pressed to connect the flange and the lower part of the body through a heated and melted synthetic resin layer. It is possible to prevent the synthetic resin layer on the outer peripheral surface side of the lower part of the body from peeling off when thermocompression bonding is carried out, and it is possible to prevent the generation of defective containers due to the peeling off of the synthetic resin layer. In addition, by cooling the outer periphery of the lower part of the body with cooling gas (it is equipped with a cooling pipe that supplies cooling gas), the cooling device and the synthetic resin layer do not come into direct contact, so the molten synthetic resin is cooled. Since adhesion to the device can be prevented, there is no risk of deformation of the container appearance or separation of the synthetic resin layer from the core material, resulting in defective products.

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。 In addition, by cooling the outer circumferential surface of the lower part of the body and bending the bottom edge, the supply time of cooling gas is shortened, so that only the synthetic resin layer on the outer circumferential side of the lower part of the body is cooled, and the bottom edge is bent. Since the temperature of the synthetic resin layer on the lower inner peripheral surface side does not decrease, there is an advantage that the thermocompression bonding strength of the bottom of the container is not impaired.

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

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。 The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view of a container formed by fitting a bottom part to a body part;
Fig. 2 is a vertical cross-sectional view of a main part showing the process of heating the inner circumferential surface of the lower part of the bottom of the container shown in Fig. 1, and Fig. 3 is the process of cooling the outer circumferential surface of the lower part of the body and bending the bottom edge inward. FIG. 4 is a longitudinal cross-sectional view of the main part showing the process of overlapping the bottom edge and the flange and pressing the overlapping part to thermocompress the flange and the lower part of the trunk. be. 1... Container, 2... Body, 3... Bottom, 4...
...bottom edge, 5...flange, 8...core layer, 9,
9', 10, 10'...Synthetic resin layer, 11...Bottom lower inner peripheral surface, 12...Hot air supply pipe, 14...Body lower part, 15...Bending mold, 16...Cooling pipe,
17... Cooling gas supply port, 19... Crimping mold.

Claims (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。[Scope of Claims] 1. A material consisting of a core layer and synthetic resin layers laminated on both the front and back surfaces of the core layer, and has a cylindrical body and a shape that fits into the inner surface of the bottom of the body. and a bottom part integrally provided with a flange at the end part, and the bottom part is fitted onto the inner surface of the bottom part of the body part, thereby heating the lower inner peripheral surface of the bottom part of the container to form the body part. The synthetic resin layers on the bottom edge and the flange of the bottom part are melted, and cooling gas is then blown onto the outer peripheral surface of the lower part of the body to cool the synthetic resin layer on the outer peripheral surface of the lower part of the body. , after bending the bottom edge of the trunk inward, overlapping the edge and the flange and pressing the overlapping part,
1. A method for forming a bottom of a container, which comprises bonding the flange and the bottom of the body by thermocompression via a heat-molten synthetic resin layer to integrate the body and the bottom. 2. An end portion having a shape that fits into the inner surface of the bottom of the cylindrical body formed of a material consisting of a core layer and synthetic resin layers laminated on both the front and back surfaces of the core layer. A flange is integrally provided on the container, and the inner peripheral surface of the lower part of the bottom of the container formed by fitting the bottom part made of the above-mentioned material is heated to cause the bottom end edge of the body part and the bottom part to be heated. A heating means for melting each synthetic resin layer of the flange, a bending die for bending the end edge of the body inward, and a cooling means provided on the bending die and applied to the outer circumferential surface of the lower part of the body. A cooling pipe equipped with a cooling gas supply port for spraying a cooling gas, and a synthetic resin layer that is heated and melted by overlapping the flange and the inwardly bent bottom edge and pressing them together. 1. An apparatus for forming a bottom of a container, comprising a compression mold for thermocompression bonding a flange, a body, and a lower body.
JP57047026A 1982-03-24 1982-03-24 Method and device for molding vessel bottom Granted JPS58163641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57047026A JPS58163641A (en) 1982-03-24 1982-03-24 Method and device for molding vessel bottom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57047026A JPS58163641A (en) 1982-03-24 1982-03-24 Method and device for molding vessel bottom

Publications (2)

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

Family

ID=12763658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57047026A Granted JPS58163641A (en) 1982-03-24 1982-03-24 Method and device for molding vessel bottom

Country Status (1)

Country Link
JP (1) JPS58163641A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3704008B2 (en) 1999-10-14 2005-10-05 株式会社トップ Joining method with synthetic resin parts
DE102014210961A1 (en) 2014-06-06 2015-12-17 Michael Hörauf Maschinenfabrik Gmbh U. Co. Kg Method and apparatus for making a cup
JP2021095215A (en) * 2019-12-16 2021-06-24 昭和電工パッケージング株式会社 Cup-like container

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5741122Y2 (en) * 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 (en) 1983-09-28

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