WO2016052689A1 - 充填包装機 - Google Patents

充填包装機 Download PDF

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Publication number
WO2016052689A1
WO2016052689A1 PCT/JP2015/077894 JP2015077894W WO2016052689A1 WO 2016052689 A1 WO2016052689 A1 WO 2016052689A1 JP 2015077894 W JP2015077894 W JP 2015077894W WO 2016052689 A1 WO2016052689 A1 WO 2016052689A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
vertical
seal portion
heat
forming portion
Prior art date
Application number
PCT/JP2015/077894
Other languages
English (en)
French (fr)
Inventor
秀則 木暮
敏昭 志田
Original Assignee
大成ラミック株式会社
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 大成ラミック株式会社 filed Critical 大成ラミック株式会社
Priority to US15/512,879 priority Critical patent/US10486839B2/en
Priority to JP2016512124A priority patent/JP6137584B2/ja
Priority to KR1020177009752A priority patent/KR101961574B1/ko
Publication of WO2016052689A1 publication Critical patent/WO2016052689A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/08—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it in a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing
    • B65B9/087—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it in a web folded and sealed transversely to form pockets which are subsequently filled and then closed by sealing the web advancing continuously
    • 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
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/345—Progressively making the joint, e.g. starting from the middle
    • B29C66/3452—Making complete joints by combining partial 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43129—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles, i.e. oblique
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/812—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—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 composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81—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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81457—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a block or layer of deformable material, e.g. sponge, foam, rubber
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B29C66/91423—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
    • B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/22—Forming shoulders; Tube formers
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/81422—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 convex
    • 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
    • B29C66/81433—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 being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—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 being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • 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
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
    • B65B57/06—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages and operating to control, or to stop, the feed of articles or material to be packaged

Definitions

  • the present invention relates to a filling and packaging machine for producing a package body in which a pouring passage that is easily peeled and sealed is provided on a vertical seal portion.
  • Patent Document 1 discloses a packaging bag in which an easily peelable and openable seal portion is provided at a spout portion.
  • the applicant provides a pouring passage for an object to be packaged in which an easily peelable seal is formed in a palm-shaped back-bonded joint, and is folded in two around the back-bonded joint
  • a packaging bag in which the easy-to-peel seal can be easily opened with a small pressing force by pressing the filling space of the object to be packaged, and the object to be packaged can be poured out.
  • Patent Document 3 A method of suppressing (Patent Document 3), a method of forming an ink coating layer on the heat seal surface of a packaging film, and the like have been proposed.
  • Patent Document 3 has problems in that equipment necessary for plasma irradiation is expensive and that the plasma irradiation process varies, and in the method of forming an ink coating layer, There is a possibility that ink may be mixed into the package, and it cannot be used particularly when the package is food or drink.
  • an object thereof is to provide a filling and packaging machine that can form an easily peelable seal portion accurately only in the dispensing passage provided in the vertical seal portion, Furthermore, since the vertical seal portion as shown in the cited document 2 is manufactured from the back-bonded joint portion, the upper and lower lateral seal portions of the packaging bag can be uniformly joined with high fusion strength. An object is to provide a filling and packaging machine having a transverse sealing means.
  • the inventor turned the packaging film fed out from the raw fabric roll at the center so that the adhesive layer or the sealant layer faces, and on the side edge portion, Longitudinal sealing means that continuously forms a longitudinal seal portion in the longitudinal direction of the packaging film to form a cylinder, and the longitudinal direction of the packaging film while filling the liquid packaging material in the tubular packaging film Horizontal sealing means for forming a package by forming transverse seal portions extending over the entire width of the packaging film at intervals in the longitudinal direction of the packaging film in a direction perpendicular to the direction.
  • the vertical seal means includes a first vertical seal portion forming portion and a second vertical seal portion forming portion. Having the first vertical After the easy peel seal part is continuously formed on the side edge portion of the packaging film by the seal part forming part, the second vertical seal part forming part is formed on the easy peel seal part so as not to be partially bottle-shaped.
  • a vertical seal portion having a seal portion is formed, and the first vertical seal portion forming portion has a pair of heat seal rolls or heat seal plates in which at least one surface is formed of an elastic material softer than metal.
  • the first vertical seal portion forming portion is composed of a pair of heat seal rolls or heat seal plates in which one surface is made of an elastic material softer than metal and the other is made of a metal material.
  • the surface of the heat seal roll or heat seal plate comprising a polishing process, a blast process or a hole process
  • the second vertical seal portion forming portion is composed of a pair of heat seal rolls or heat seal plates provided with a heat seal bar having a bottle-shaped notch, and the vertical seal means is the second vertical seal.
  • the vertical seal portion is a back bonded joint portion
  • the horizontal seal means includes a first horizontal seal portion forming portion and a second horizontal seal portion forming portion, the first horizontal seal portion forming portion.
  • At least one of the second horizontal seal portion forming portion has a pair of heat seal rolls or heat seal plates in which at least the surface on the back-bonded joint portion side is formed of an elastic material softer than metal, (4) A pair of heats in which at least one of the first horizontal seal portion forming portion and the second horizontal seal portion forming portion has one surface made of an elastic material softer than metal and the other made of a metal material. It is composed of a seal roll or a heat seal plate, and the surface of the heat seal roll or heat seal plate made of the metal material is subjected to groove processing extending in a direction perpendicular to the running direction of the packaging film, (5)
  • the elastic material softer than the metal has a laminated structure of two or more layers, It is.
  • the easy peel seal portion is formed on the overlapped side edge portion of the packaging film by the first vertical seal portion forming portion.
  • the easy peel seal portion is By sealing with high strength leaving the bottle-shaped pouring passage by the seal portion forming portion, the pouring passage can be formed on the vertical seal portion, and only the inside of the pouring passage is easily peeled and sealed. State.
  • the first vertical seal portion forming portion is composed of a pair of heat seal rolls or heat seal plates, and the surface of either one or both of the pair of heat seal rolls or heat seal plates is made of metal. Since it is made of softer elastic material, the clamping force (pressing force) on the packaging film can be reduced, so it is easy and stable by adjusting the clearance and temperature between the heat seal roll or heat seal plate. Thus, an easily peelable seal portion can be formed.
  • the first vertical seal portion forming portion is constituted by a pair of heat seal rolls or heat seal plates in which one surface is made of an elastic material softer than metal and the other is made of a metal material.
  • the surface of the heat seal roll or heat seal plate made of a metal material is preferably ground, blasted or perforated. According to this, since the contact area to the packaging film is reduced, The pressure and heat transfer are weakened, and the easily peelable seal portion can be formed more stably.
  • the second vertical seal portion forming portion is used as a vertical seal means for forming a bottle-mouth-shaped dispensing passage, and a third vertical seal portion forming portion is provided at a rear position thereof to provide the second vertical seal.
  • the horizontal seal means is constituted by the first horizontal seal portion forming portion and the second horizontal seal portion forming portion, thereby forming the first horizontal seal portion.
  • At least one of the first and second horizontal seal portion forming portions is laterally sealed by a pair of heat seal rolls or heat seal plates made of an elastic material whose surface on the back-bonded joint portion side is made of a softer material than metal.
  • the back bonding part is embedded in the elastic material, and the difference in thickness between the back bonding part (four packaging films) having different thickness and the other part (two packaging films) is alleviated.
  • the upper and lower lateral seal portions of the packaging bag can be uniformly and firmly fused and joined by the lateral seal means.
  • At least one of the first horizontal seal portion forming portion and the second horizontal seal portion forming portion is a pair of heat seals in which one surface is made of an elastic material softer than metal and the other is made of a metal material.
  • the elastic material softer than the metal is composed of a laminated structure of two or more layers of a base material and a covering material, deformation and wear of the base material can be suppressed by the covering material, Various base materials can be used, and a heat seal roll or a heat seal plate can be used over a long period of time.
  • FIG. 1 is one Embodiment of the structure of the heat seal roll of a 1st horizontal seal part formation part and a 2nd horizontal seal part formation part
  • (b) is the heat which consists of a metal material of a 2nd horizontal seal part formation part. It is a figure which shows the surface shape of a seal roll.
  • FIG. 1 is a schematic diagram showing the configuration of a vertical filling and packaging machine as an embodiment of the filling and packaging machine of the present invention.
  • the vertical filling and packaging machine shown in FIG. 1 is a sheet of a laminated film in which, for example, a base film layer made of a biaxially stretched nylon film, a polyethylene terephthalate film, etc., and a sealant layer made of, for example, various polyethylene resins are laminated. While continuously running a long packaging film in the longitudinal direction, it is folded back in the width direction so that the sealant layers face each other, and the edges on both sides are overlapped.
  • Each package bag is automatically made with food, foods, seasonings, pharmaceuticals, cosmetics, and other liquid or viscous or jelly-like fluids. It is to be filled.
  • a single long packaging film F that is continuously fed from a film roll (not shown) and runs is continuously run from above to below via the film guide portion 1.
  • the film F for packaging is folded back in the width direction so that the sealant layer faces each other while being guided by the film folding part 2 composed of U-shaped and inverted L-shaped guide rods (upper part) during the running. Then, both side edges of the packaging film F are overlapped.
  • the longitudinal direction of the packaging film F is turned up by the pair of vertical seal rolls 3a.
  • the easily peelable seal portion 4a is formed by continuously heating and pressing in the direction (longitudinal direction) to form a cylinder.
  • the easy peel seal part 4a is provided with a certain width from both side edges of the packaging film F, or may be appropriately changed such as being provided in a linear shape at a position separated from both side edges or in a vertical stripe shape. Can do.
  • a pair of seal plates may be used in addition to the pair of seal rolls.
  • the easy peel seal portion 4a can suppress the outflow of the object to be packaged in the bag, but can be easily peeled by pressing the filling object in the bag to the filling space.
  • 2 to 10 N / 15 mm It has a degree of fusion strength.
  • Such an easily peelable seal portion 4a can be formed by adjusting the temperature, pressure, etc. of the pair of vertical seal rolls 3a.
  • a pair of vertical seal rolls made of metal was used. The temperature range was as narrow as 1 to 2 ° C. and its adjustment was very difficult.
  • At least one surface of the pair of vertical seal rolls 3a is made of an elastic material softer than metal (hereinafter, simply referred to as “elastic material”), so that a pair of vertical seals is formed. Since the pressing force between the rolls 3a can be set to an extremely low pressure (about 0 to 15 MPa), the easy peel strength can be adjusted by adjusting the temperature of the vertical seal roll 3a and the clearance between the pair of vertical seal rolls. However, the easily peelable seal portion 4a can be stably formed.
  • Each of the pair of vertical seal rolls 3a has one annular flange on the outer peripheral surface thereof and a heater (not shown) for heating the annular flange inside thereof, but when the vertical seal roll 3a is made of an elastic material, Since the thermal conductivity is small, the temperature difference between the inside and the outer surface of the vertical seal roll 3a is increased. Therefore, it is preferable to adjust the heater temperature of the vertical seal roll 3a by measuring the temperature of the roll 3a surface using a radiation thermometer, an infrared camera, or the like and based on the measured value.
  • the elastic material consists of rubber materials such as silicon rubber, fluorine rubber, ethylene propylene rubber, hyperon rubber, nitrile butadiene rubber, polytetrafluoroethylene, epoxy resin, phenol resin, polyamide, polyester, etc. Any material lower than metal may be used.
  • the thickness is preferably 1.0 to 5.0 mm.
  • either one of the pair of vertical seal rolls 3a is made of a metal material
  • the surface of the vertical seal roll 3a made of the metal material is polished or blasted, and a hole of about ⁇ 0.2 to 0.8 mm is drilled. It is preferable to reduce the contact area to the packaging film F. According to this, the pressure and heat transfer from the vertical seal roll 3a are weakened, and the easily peelable seal portion 4a is formed. Adjustment of temperature, pressing force, etc. becomes easy.
  • strength required as a package body is continuously heated and pressurized on the easily formed peel seal part 4a by a pair of vertical seal roll 5a.
  • a pair of bottle-shaped notches are formed on the surfaces of the pair of vertical seal rolls 5a at regular intervals, whereby the vertical seal portion 4b is not formed at the notch position. Therefore, as shown in FIG. 2 (b), the vertical seal portions 4b and the dispensing passages 20 having the bottle-shaped easily peelable seal portions 4a are alternately formed on the side edge portions of the packaging film F. It will be.
  • the bottle-shaped pouring passage 20 is tapered toward the side edge of the packaging film F, but is not limited to this. It may be a fat shape or the like.
  • the second vertical seal portion forming portion 5 may also use a pair of seal plates in addition to the pair of seal rolls.
  • the second vertical seal portion forming unit 5 is, for example, the traveling speed of the packaging film F input to the control means functioning as the main computer of the filling and packaging machine, the rotational speed of the first vertical seal portion forming unit 3, and heat sealing. Based on the production conditions such as the length of the bar and the product pitch, it can be formed to an appropriate length by controlling the rotation of the drive motor.
  • two guide rods (lower part) 18 are inserted into the tubular packaging film F from the film folding portion 2, and the packaging film F is inserted with these guide rods (lower part) 18. Is spread in a direction perpendicular to the traveling direction, and the vertical seal portion 4b is positioned at the center portion (back bonding joining position), and then the article to be packaged is formed in a cylindrical shape from the article supply unit 6 to be packaged.
  • the inside of the packaging film F is filled continuously or intermittently by a predetermined amount.
  • the vertical seal portion 4b positioned as the back-bonded joint portion is tilted to either one side, and in that state, in the first horizontal seal portion forming portion 7, the packaging film F is spaced at a certain interval in the longitudinal direction,
  • the horizontal seal portion 8 is intermittently formed by pressurizing and welding to each other while heating over the entire width by the pair of horizontal seal rolls 7a. Thereafter, the pair of horizontal seal rolls 9a of the second horizontal seal portion forming portion 9 re-presses the horizontal seal portion 8 to secure the horizontal seal, whereby a large number of packaging bags W are formed on the packaging film F. Bags are continuously made in a state of being connected in the longitudinal direction.
  • At least one of the pair of horizontal seal rolls 7a and 9a has at least the surfaces of a plurality of seal bars 17 and 19 projecting from the outer peripheral surface of the horizontal seal roll on the side of the vertical seal portion 4b serving as a back-bonded joint.
  • the elastic material 11 is preferably used.
  • the surfaces of a plurality of seal bars 17, 19 (four directions in the figure) on the back-attached joint side of the pair of horizontal seal rolls 7a and 9a are made of an elastic material 11, while the other A case where a plurality of corresponding seal bars 17 'and 19' (four sides in the figure) on the side is made of a metal material is shown.
  • the horizontal seal part 8 used as the upper end part and lower end part of a packaging bag is formed on the cylindrical packaging film F in the state which folded down the vertical seal part 4b used as a back bonding junction part to one side.
  • the vertical seal portion 4b (back bonding joint portion) in which the four packaging films F overlap is embedded in the surface of the heat seal roll or heat seal plate made of an elastic material, and the packaging film F The difference in thickness from other portions is alleviated, and the lateral seal portion 8 can be formed uniformly and firmly without increasing the pressing force.
  • the elastic material 11 is a rubber material such as silicon rubber, fluorine rubber, ethylene propylene rubber, hyperon rubber, nitrile butadiene rubber, polytetrafluoroethylene, epoxy resin, phenol resin, polyamide, polyester, etc. Any material lower than the material may be used.
  • the thickness is preferably 1.0 to 5.0 mm.
  • the traveling direction of the packaging film F on the surface of the seal bar 19 ′ made of a metal material of the horizontal seal roll 9a of the second horizontal seal portion forming portion 9 is shown. It is preferable to perform the groove processing 12 in a vertical direction, and according to this, it is possible to push out the articles to be packaged and the air bubbles which are bitten in the lateral seal portion 8 by increasing the surface pressure of the seal bar 19 ′. At the same time, since the linear pressure at the edge portion of the seal bar 19 ′ of the horizontal seal roll 9a increases, the upper and lower ends of the horizontal seal portion 8 overlapping the vertical seal portion 4b can be firmly fused.
  • FIG. 4 shows another embodiment of the horizontal seal rolls 7a and 9a.
  • the pair of horizontal seal rolls 7a that form the first horizontal seal portion forming portion 7 of this embodiment is such that the surface of the seal bar 17 on the back bonded joint side is made of an elastic material 11 such as polytetrafluoroethylene, and the other side.
  • a plurality of corresponding seal bars 17 ' are made of a metal material, while the seal bars 19, 19' of the pair of horizontal seal rolls 9a forming the second horizontal seal portion forming portion 9 are both made of a metal material.
  • the surface of the seal bar 19 on the side of the back-bonded portion of the horizontal seal roll 9a is provided with groove processing 12 in a direction perpendicular to the traveling direction of the packaging film F as shown in FIG. Yes.
  • the horizontal seal portion 8 can be uniformly and firmly formed by the effect of the seal bar 17 made of an elastic material of the pair of horizontal seal rolls 7a of the first horizontal seal portion forming portion 7.
  • the horizontal seal portion 8 is heated and pressurized while extruding an object to be packaged interposed in the horizontal seal portion 8 by a pair of horizontal seal rolls 9a made of a metal material of the second horizontal seal portion forming portion 9. Therefore, the seal strength can be further improved.
  • the elastic material 11 on the surface of the seal bar 17 of the horizontal seal roll 7a has a base material 21 and a covering material for covering the base material 21 as shown in FIG.
  • a laminated structure with 22 can also be used.
  • the covering material 22 may have a laminated structure (two layers: 22a and 22b in the figure) as shown in FIG.
  • a PET layer or the like is laminated as the coating material 22a on the base material 21 made of an elastic material such as trifluoroethylene, and the deformation or wear of the base material 21 is suppressed, so that the coating material becomes the outermost layer.
  • a fluorine-impregnated layer or the like is laminated to suppress wear or breakage of the sandwiched packaging film, and to prevent adhesion between the packaging film and the seal bar 17, etc. It is preferable to select the covering material 22 as appropriate in accordance with various conditions such as the type of packaging film. Thereby, while being able to use various base materials 21, it becomes possible to use a heat seal roll and a heat seal board over a long period of time.
  • the elastic material 11 used for the above-described vertical seal roll 3a can also have a laminated structure including the base material 21 and the covering material 22, and the same effect as described above can be expected.
  • a 3rd vertical seal part formation part in the back position of the 2nd vertical seal part formation part 5, and in this case, for example, the vertical seal roll 5a of the 2nd vertical seal part formation part 5 is provided.
  • a heat seal bar having a bin-shaped notch on the surface is provided, and the heat seal bar is used to form a vertical seal portion 4b having bin-shaped dispensing passages 20 at regular intervals as shown in FIG.
  • the third vertical seal portion forming portion is heat-sealed so as to cover the gap 13 formed between the vertical seal portions 4b, and the vertical seal portions 4b are connected to form the joint seal portion 14. It functions as a sealing means.
  • the third vertical seal part forming part there is no need to replace the device in accordance with the vertical length (product pitch) of the product to be manufactured. Different types of products can be manufactured using the same equipment.
  • the third vertical seal portion forming portion is, for example, the traveling speed of the packaging film F input to the control means functioning as the main computer of the filling and packaging machine, the rotational speed of the second vertical seal portion forming portion 5, and the heat seal bar.
  • the vertical seal portion can be formed to an appropriate length by controlling the rotation of the drive motor based on the production conditions such as the length and the product pitch.
  • the pouring passage 20 having the easily peelable seal portion 4a was formed on the back-bonded joint portion consisting of the vertical seal portion 4b of the package W.
  • Each package W had a bag width of 54 mm and a bag pitch of 50 mm (including an upper and lower horizontal seal portion: 6 mm ⁇ 2 and an inner dimension of 38 mm), and was filled with 5 g of water as an article to be packaged. As shown in FIG.
  • each package W is placed on a flat bottom plate 15 while being folded in two around a back-bonded joint (vertical seal portion 4 b), and this is covered by a flat top plate 16.
  • the unsealing strength was measured by pressing until the easily peelable seal portion 4a in the dispensing passage 20 was peeled off.
  • the results are shown in Tables 1 and 2.
  • the evaluation criteria were as follows. ⁇ : Liquid leakage occurred ⁇ : Less than 2.0 kgf ⁇ : 2.0 kgf or more and less than 5.0 kgf ⁇ : 5.0 kgf or more
  • Packaging film NY15 ⁇ m / LLDPE40 ⁇ m Silicon rubber: Thickness 3mm, hardness 90 degrees Filling speed: 12m / min Distance between rolls of first heat seal roll: No adjustment (Condition 2) Packaging film: NY15 ⁇ m / LLDPE40 ⁇ m Silicon rubber: Thickness 3mm, hardness 90 degrees Filling speed: 12m / min Set temperature: 95 ° C Distance between rolls of first heat seal roll: Adjustable Seal width: 2.4 mm, 1.0 mm, 0.5 mm Pressing force of the first heat seal roll: with adjustment In the above, the distance between the rolls is negative indicates that the metal roll has bitten into the rubber roll.
  • the temperature range in which the easily peelable seal portion 4a can be formed is wide, and the easily peelable seal portion can be stably formed by adjusting the heat seal temperature.
  • the easily peelable seal portion can be formed with a low pressing force by adjusting the clearance between rolls, and to easily peel off without adjusting the clearance between rolls by increasing the pressing force. It has been found that a seal portion can be formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Package Closures (AREA)
  • Packages (AREA)

Abstract

【課題】高価な機器を使用する必要がなく、縦シール部に設けた注出通路のみに正確に易剥離シール部を形成することができる充填包装機を提供すること。 【解決手段】包装用フィルムを中央部で折り返し、その側縁部分に連続的に縦シール部を形成して筒状とする縦シール手段と、包装用フィルムの長手方向に直交する方向に横シール部を形成する横シール手段とを備える充填包装機において、第１縦シール部形成部によって包装用フィルムの側縁部分に連続的に易剥離シール部を形成した後、該易剥離シール部上に、第２縦シール部形成部によって一部に非シール部分を有する縦シール部を形成し、前記第１縦シール部形成部が、少なくとも一方の表面が金属よりも軟質の弾性材料によって形成されてなる一対のヒートシールロールまたはヒートシール板を有していること。

Description

充填包装機
　この発明は、縦シール部上に易剥離シールされた注出通路を設けてなる包装体を製造するための充填包装機に関するものである。
　軟質の包装用フィルムを袋状に成形し、飲食物、調味液、医薬品、化粧品等の液状物、粘稠物もしくは粉、粒状物、その他の被包装物を充填包装した包装袋が広く利用されている。このような包装袋からの被包装物の取り出しを容易にするため、特許文献１には、注出口部分に易剥離開封性シール部を設けてなる包装袋が開示されている。
　また、出願人は特許文献２において、合掌状の背貼り接合部に易剥離シールが形成された被包装物の注出通路を設けると共に、該背貼り接合部を中心として２つに折り畳んだ状態で被包装物の充填スペースを押圧することで、小さな押圧力で簡単に前記易剥離シールを開封し、被包装物を注出することのできる包装袋を提案している。
　このような包装袋への易剥離シール部の形成方法としては、例えば、包装用フィルムのシーラント層表面にプラズマ照射処理を行ってその表面の濡れ性を向上させ、包装用フィルム同士の融着を抑制する方法（特許文献３）や、包装用フィルムのヒートシール面にインク塗膜層を形成する方法等が提案されている。
特開平１１－２２７７９６号公報 特開２０１３－１６９９９１号公報 特開２０１４－０５８３３８号公報
　しかしながら、特許文献３の方法では、プラズマ照射に必要な機器が高価であることや、プラズマ照射処理にバラツキが発生してしまうことに問題があり、またインク塗膜層を形成する方法では、被包装物にインクが混入するおそれがあり、とくに被包装物が飲食物である場合には使用することができなかった。
　また、特許文献２記載の包装袋では、背貼り接合部に設けた注出通路のみに正確に易剥離部を形成する必要があるが、従来の方法はいずれも精度が低く、他の部分まで易剥離処理されてしまったり、易剥離強度のコントロールが難しく、該易剥離部分から破袋が生じ、液漏れ等するおそれがあり、とくに充填包装機に適用し、高速充填包装することには至っていない。
　さらに、特許文献２の包装体を従来の３方もしくは４方シール型の充填包装機で製造しようとすると、背貼り接合部を一方に倒した状態で横シールを行うことから、背貼り接合部分（包装用フィルム４枚）と、その他の部分（包装用フィルム２枚）とに厚み差があるため、均一に融着接合させることができず、厚みの大きい背貼り接合部分のみが融着されて、その他の部分から液漏れが発生したり、厚み差を緩和するため強い押圧力が必要になる等の問題点があった。
　そこで、本発明では、高価な機器を使用する必要がなく、縦シール部に設けた注出通路のみに正確に易剥離シール部を形成することができる充填包装機を提供することを目的とし、さらには、引用文献２に示すような縦シール部が背貼り接合部からなる包装体を製造するため、包装袋の上側および下側横シール部を高い融着強度で均一に接合することができる横シール手段を有する充填包装機を提供することを目的とする。
　前記目的の実現に向けた研究の中で、発明者は、原反ロールから繰り出し走行される包装用フィルムを、接着層もしくはシーラント層が対向するように中央部で折り返し、その側縁部分に、包装用フィルムの長手方向に連続的に縦シール部を形成して筒状とする縦シール手段と、該筒状の包装用フィルム内に液状の被包装物を充填しながら、包装用フィルムの長手方向に直交する方向に、包装用フィルムの全幅にわたって延在する横シール部を、包装用フィルムの長手方向に間隔をおいて形成して包装体を形成する横シール手段と、を備え、前記縦シール部上に易剥離シールされてなる注出通路を有する包装体を製造するための充填包装機において、前記縦シール手段が、第１縦シール部形成部と第２縦シール部形成部とを有し、該第１縦シール部形成部によって包装用フィルムの側縁部分に連続的に易剥離シール部を形成した後、該易剥離シール部上に、第２縦シール部形成部によって、一部にビン口形の非シール部分を有する縦シール部を形成し、前記第１縦シール部形成部が、少なくとも一方の表面が金属よりも軟質の弾性材料によって形成されてなる一対のヒートシールロールまたはヒートシール板を有していることが有効であることを突き止め、本発明を開発するに到った。
　なお、本発明の充填包装機については、さらに下記のような構成にすることがより好ましい解決手段となる。即ち、
（１）前記第１縦シール部形成部は、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板からなり、金属材料からなる該ヒートシールロールまたはヒートシール板の表面が、研磨加工、ブラスト加工または孔加工されていること、
（２）前記第２縦シール部形成部が、ビン口形の切欠きを有するヒートシールバーが設けられた一対のヒートシールロールまたはヒートシール板からなり、前記縦シール手段が、前記第２縦シール部形成部の後方位置に、第２縦シール部形成部によって形成されたシール部間をヒートシールするための第３縦シール部形成部を有していること、
（３）前記縦シール部が背貼り接合部であると共に、前記横シール手段が、第１横シール部形成部と第２横シール部形成部とを有し、該第１横シール部形成部および第２横シール部形成部の少なくとも一方は、少なくとも背貼り接合部側の表面が金属よりも軟質の弾性材料によって形成されてなる一対のヒートシールロールまたはヒートシール板を有していること、
（４）前記第１横シール部形成部および第２横シール部形成部の少なくとも一方は、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板からなり、該金属材料からなるヒートシールロールまたはヒートシール板の表面に、包装用フィルムの走行方向に対し垂直な方向に延在する溝加工が施されていること、
（５）前記金属よりも軟質の弾性材料が、２層以上の積層構造を有すること、
である。
　この発明の充填包装機によれば、まず第１縦シール部形成部によって包装用フィルムの、重ね合わせた側縁部分に易剥離シール部を形成した後、該易剥離シール部分を、第２縦シール部形成部によってビン口形の注出通路を残して高い強度でシールすることで、縦シール部上に注出通路を形成することができると共に、該注出通路内だけを易剥離シールされた状態とすることができる。
　しかも、この発明では、前記第１縦シール部形成部が、一対のヒートシールロールまたはヒートシール板からなり、それら一対のヒートシールロールまたはヒートシール板のうちのいずれか一方または両方の表面を金属よりも軟質の弾性材料によって構成したことにより、包装用フィルムに対する挟持力（押圧力）を小さくすることができるため、ヒートシールロールあるいはヒートシール板間のクリアランスと温度を調整することで簡単かつ安定して易剥離シール部を形成することができる。
　なお、前記第１縦シール部形成部を、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板によって構成する場合には、金属材料からなるヒートシールロールまたはヒートシール板の表面に研磨加工、ブラスト加工または孔加工をすることが好ましく、これによれば包装用フィルムへの接触面積が小さくなるため、包装用フィルムへの押圧力および熱の伝わりが弱くなり、易剥離シール部をより安定して形成することができる。
　また、この発明では、第２縦シール部形成部をビン口形の注出通路を形成するための縦シール手段とし、その後方位置に第３縦シール部形成部を設けて、該第２縦シール部形成部によって形成された縦シール部間をヒートシールできるようにすることで、製造する製品の縦方向長さ（製品ピッチ）に合わせて、適宜、縦シール部長さを変更できるようになり、製品ピッチに合わせて装置を取り替える必要がなく、製品ピッチの異なる各種の製品を同じ装置を使って製造することができる。
　さらに、この発明では、縦シール部が背貼り接合部からなる場合において、横シール手段を第１横シール部形成部と、第２横シール部形成部とによって構成し、第１横シール部形成部および第２横シール部形成部の少なくとも一方を、少なくとも背貼り接合部側の表面が金属よりも軟質の弾性材料からなる一対のヒートシールロールまたはヒートシール板によって構成することで、横シールする際に、背貼り接合部が弾性材料に埋め込まれて、厚みの異なる背貼り接合部（包装用フィルム４枚）とその他の部分（包装用フィルム２枚）との厚み差が緩和されることになり、該横シール手段によって包装袋の上側および下側横シール部を均一かつ強固に融着接合させることができる。
　また、前記第１横シール部形成部および第２横シール部形成部の少なくとも一方を、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板によって構成し、金属材料からなる該ヒートシールロールまたはヒートシール板の表面に、包装用フィルムの走行方向とは垂直な方向に延在する溝加工を施すことにより、横シール部内に噛み込まれた被包装物や気泡を押し出すことができると共に、面圧の上昇により、凸部のエッジ部分における線圧力が高くなり、縦シール部と重なる横シール部の部分の上下端部をしっかりと融着させることができる。
　なお、前記金属よりも軟質の弾性材料を、基材と被覆材との２層以上の積層構造によって構成した場合には、基材の変形や摩耗等を被覆材によって抑制することができるので、種々の基材を用いることができると共に、ヒートシールロールまたはヒートシール板を長期に亘って使用することができる。
この発明の充填包装機の一実施形態としての縦型充填包装機の構成を示す図である。 縦シール部上に易剥離シール部を有する注出通路を形成する方法を説明する図である。 （ａ）は、第１横シール部形成部および第２横シール部形成部のヒートシールロールの構成の一実施形態、および（ｂ）は、第２横シール部形成部の金属材料からなるヒートシールロールの表面形状を示す図である。 （ａ）は、第１横シール部形成部および第２横シール部形成部のヒートシールロールの構成を示す他の実施形態および（ｂ）は第１横シール部形成部の弾性材料部分を拡大して示す断面図である。 第３横シール部形成部を用いた場合の縦シール部の形成状態を示す図である。 易剥離シール部の開封強度の試験態様を例示する図である。
　図１は、本発明の充填包装機の一実施形態としての縦型充填包装機の構成を示す模式図である。図１の縦型充填包装機は、例えば、２軸延伸したナイロンフィルム、ポリエチレンテレフタレートフィルム等からなるベースフィルム層と、例えば各種ポリエチレン樹脂等からなるシーラント層とを積層した積層フィルムからなる１枚の長尺の包装用フィルムをその長手方向に連続的に走行させながら、そのシーラント層が互いに向かい合わせになるように幅方向に折り返してその両側縁部同士を重ね合わせて、その包装用フィルムから多数の包装袋を連続的に製袋しつつ、各包装袋内に飲食物、調味料、医薬品、化粧品その他の液状ないし粘稠状あるいはゼリー状等の流動性物質からなる被包装物を自動的に充填するものである。
　図１に示す充填包装機では、図示しないフィルムロールから連続的に繰出されて走行する１枚の長尺の包装用フィルムＦをフィルム案内部１を介して上方から下方へ連続的に走行させながら、その走行中にＵ字状および逆Ｌ字状のガイドロッド（上部）からなるフィルム折返し部２で案内しつつ、包装用フィルムＦをそのシーラント層が互いに向かい合わせになるように幅方向に折り返して、包装用フィルムＦの両側縁部同士を重ね合わせる。
　次に、第１縦シール部形成部３において、図２（ａ）に示すように包装用フィルムＦの折り返して重ね合わせた両側縁部同士を一対の縦シールロール３ａによって包装用フィルムＦの長手方向（縦方向）に連続的に加熱および加圧して易剥離シール部４ａを形成して筒状とする。なお、易剥離シール部４ａは、包装用フィルムＦの両側縁端から一定の幅で設ける他、両側縁端から離隔した位置に線状に設けることや、縦縞状に設ける等、適宜変更することができる。第１縦シール部形成部３としては、一対のシールロールの他、一対のシール板を用いてもよい。
　ここで易剥離シール部４ａとは、袋内の被包装物の流出を抑制することができる一方、袋内の被包装物の充填スペースへの押圧によって簡単に剥離できる、例えば２～１０Ｎ／１５ｍｍ程度の融着強度を有するものである。このような易剥離シール部４ａは、一対の縦シールロール３ａの温度、圧力等を調整することで形成することができるが、従来は、金属製の一対の縦シールロールを用いていたため、好適な温度範囲が１～２℃と狭く、その調整が非常に難しかった。これに対し、本発明では、一対の縦シールロール３ａの、少なくとも一方の表面を金属よりも軟質の弾性材料（以下、単に「弾性材料」と言う。）によって構成したことにより、一対の縦シールロール３ａ同士の押圧力を極低圧（０～１５ＭＰａ程度）とすることができるため、該縦シールロール３ａの温度や一対の縦シールロール間のクリアランス等を調整することで、易剥離強度を調整しながら、易剥離シール部４ａを安定して形成することができる。
　一対の縦シールロール３ａは各々、その外周面上に１つの環状フランジを有するとともに、その内部に環状フランジを加熱する図示しないヒータを有するが、縦シールロール３ａが弾性材料からなる場合には、熱伝導率が小さいため、縦シールロール３ａ内部と外表面との温度差が大きくなってしまう。そのため、縦シールロール３ａのヒータ温度は、該ロール３ａ表面の温度を、放射温度計や赤外線カメラ等を利用して測定し、該測定値に基づいて調整することが好ましい。なお、弾性材料としては、シリコンゴム、フッ素ゴム、エチレンプロピレンゴム、ハイパロンゴム、ニトリルブタジエンゴム等のゴム材料や、ポリテトラフルオロエチレン、エポキシ樹脂、フェノール樹脂、ポリアミド、ポリエステル等からなり、弾性率が金属よりも低いものであればどのようなものでもよい。なお、厚みは１．０～５．０ｍｍであることが好ましい。
　また、一対の縦シールロール３ａのいずれか一方を金属材料によって構成した場合には、金属材料からなる縦シールロール３ａの表面に研磨加工やブラスト加工、φ０．２～０．８ｍｍ程度の孔加工を施して、包装用フィルムＦへの接触面積を小さくすることが好ましく、これによれば、縦シールロール３ａからの押圧力および熱の伝わりが弱くなり、易剥離シール部４ａの形成に際する温度や押圧力等の調整が容易になる。
　次に、第２縦シール部形成部５において、先に形成した易剥離シール部４ａ上を一対の縦シールロール５ａによって連続的に加熱および加圧して、包装体として必要とされるヒートシール強度（４０Ｎ／１５ｍｍ以上　ナイロン厚み１５μｍ／直鎖状低密度ポリエチレン厚み４０μｍの場合）を有する縦シール部４ｂを形成する。
　なお、この一対の縦シールロール５ａの表面には、一定の間隔をおいてビン口（くち）形の切欠きが形成されてなり、これによって該切欠き位置には縦シール部４ｂが形成されないことから、図２（ｂ）に示すように、包装用フィルムＦの側縁部分に、縦シール部４ｂと、ビン口形の易剥離シール部４ａを持つ注出通路２０とが交互に形成されることになる。なお、図２（ｂ）では、ビン口形の注出通路２０が包装用フィルムＦの側縁に向かって先細りの形状となっているが、これに限定されるものではなく、例えば同幅や先太り形状等であっても良い。
　また、この第２縦シール部形成部５もまた、一対のシールロールの他、一対のシール板を用いてもよい。
　なお、第２縦シール部形成部５は、例えば充填包装機のメインコンピュータとして機能する制御手段に入力された包装用フィルムＦの走行速度や第１縦シール部形成部３の回転数、ヒートシールバーの長さや製品ピッチなどの生産条件に基づいて、駆動モータを回転制御させることにより適宜の長さに形成することができる。
　この実施形態においては、筒状とした包装用フィルムＦ内に、フィルム折返し部２から例えば２本のガイドロッド（下部）１８を挿入し、それらのガイドロッド（下部）１８で、包装用フィルムＦをその走行方向に対して垂直な方向に広げて、縦シール部４ｂを中央部（背貼り接合位置）に位置させた後、被包装物供給部６から被包装物を、筒状に形成した包装用フィルムＦの内側へ連続的に、または所定量ずつ間欠的に充填する。
　また、背貼り接合部として位置する縦シール部４ｂを、いずれか一方側へ倒し、その状態で第１横シール部形成部７において、包装用フィルムＦをその長手方向に一定間隔をおいて、一対の横シールロール７ａによって全幅に亘り加熱しつつ加圧して互いに溶着させて、間欠的に横シール部８を形成する。その後、第２横シール部形成部９の一対の横シールロール９ａで、横シール部８を再押圧して該横シールを確実なものとし、これにより多数の包装袋Ｗを包装用フィルムＦの長手方向へ繋がった状態で連続的に製袋する。なお、第１横シール部形成部７の横シールロール７ａによる加熱温度は、第２横シール部形成部９の横シールロール９ａによる加熱温度よりも高く設定することが好ましい。次いで、連続包装された包装袋Ｗの、横シール部８の略中間部を切断部１０によって切断することで、個々の包装袋Ｗが得られることになる。なお、第１横シール部形成部７および第２横シール部形成部９としてはそれぞれ、一対の横シールロールの他、一対の横シール板を用いてもよい。
　ここで、前記一対の横シールロール７ａおよび９ａの少なくとも一方は、少なくとも背貼り接合部となる縦シール部４ｂ側の横シールロールの外周面から突設した複数のシールバー１７、１９の表面が弾性材料１１からなることが好ましい。図３（ａ）では一実施形態として、一対の横シールロール７ａおよび９ａの背貼り接合部側となる複数のシールバー１７、１９（図では４方）の表面が弾性材料１１からなり、他方側の対応する複数のシールバー１７’、１９’（図では４方）が金属材料からなる場合を示している。これによれば、背貼り接合部となる縦シール部４ｂを一方へ折り倒した状態で、筒状の包装用フィルムＦ上に包装袋の上端部および下端部となる横シール部８を形成する際に、４枚の包装用フィルムＦが重なってなる縦シール部４ｂ（背貼り接合部分）が、弾性材料からなるヒートシールロールまたはヒートシール板の表面に埋め込まれることになり、包装用フィルムＦの他の部分との厚み差が緩和され、押圧力を高くすることなく、均一かつ強固に横シール部８を形成することができる。なお、弾性材料１１としては、シリコンゴム、フッ素ゴム、エチレンプロピレンゴム、ハイパロンゴム、ニトリルブタジエンゴム等のゴム材料や、ポリテトラフルオロエチレン、エポキシ樹脂、フェノール樹脂、ポリアミド、ポリエステル等、弾性率が金属材料よりも低いものであればよい。また、厚みは１．０～５．０ｍｍであることが好ましい。
　なお、図３（ｂ）に拡大して示したように、第２横シール部形成部９の、横シールロール９ａの金属材料からなるシールバー１９’の表面に包装用フィルムＦの走行方向とは垂直な方向に溝加工１２を施すことが好ましく、これによれば、シールバー１９’の面圧の上昇により、横シール部８内に噛み込まれた被包装物や気泡を押し出すことができると共に、横シールロール９ａのシールバー１９’エッジ部分における線圧力が高くなるため、縦シール部４ｂと重なる横シール部８部分の上下端部をしっかりと融着させることができる。
　横シールロール７ａおよび９ａの他の実施形態を図４に示す。この実施形態の第１横シール部形成部７を形成する一対の横シールロール７ａは、背貼り接合部側となるシールバー１７の表面がポリテトラフルオロエチレン等の弾性材料１１からなり、他方側の対応する複数のシールバー１７’が金属材料からなり、一方、第２横シール部形成部９を形成する一対の横シールロール９ａのシールバー１９、１９’はいずれも金属材料からなる。また、横シールロール９ａの背貼り接合部側のシールバー１９の表面には、図３（ｂ）に示すような包装用フィルムＦの走行方向とは垂直な方向に溝加工１２が施されている。
　これによれば、上記と同様に、第１横シール部形成部７の一対の横シールロール７ａの、弾性材料からなるシールバー１７による効果によって均一かつ強固に横シール部８を形成することができ、該横シール部８は、さらに第２横シール部形成部９の金属材料からなる一対の横シールロール９ａによって、横シール部８内に介在する被包装物を押し出しながら加熱・加圧されるため、シール強度を一層向上させることができる。
　なお、横シールロール７ａのシールバー１７表面の弾性材料１１は、その断面を図４（ｂ）に拡大して示したように、基材２１と、該基材２１を被覆するための被覆材２２との積層構造とすることもできる。また、被覆材２２を、図４（ｂ）に示すように積層構造（図では２層：２２ａ、２２ｂ）としてもよい。この場合、例えば、トリフルオロエチレン等の弾性材料からなる基材２１上に、被覆材２２ａとしてＰＥＴ層等を積層して、基材２１の変形や摩耗等を抑制し、最外層となる被覆材２２ｂには、フッ素含浸層等を積層して、挟持する包装用フィルムの摩耗や破袋等を抑制すると共に、包装用フィルムとシールバー１７との付着を防止する等、基材２１の種類や包装用フィルムの種類等の様々な条件に合わせて被覆材２２を適宜選定することが好ましい。これにより、種々の基材２１を用いることができると共に、ヒートシールロールやヒートシール板を長期に亘って使用することができるようになる。なお、上記した縦シールロール３ａに用いられる弾性材料１１についても、基材２１と被覆材２２とからなる積層構造とすることができ、上記と同様の作用効果が期待できる。
　また、本発明では、第２縦シール部形成部５の後方位置に第３縦シール部形成部を設けることが好ましく、この場合には、例えば第２縦シール部形成部５の縦シールロール５ａ表面にビン口形の切欠きを有するヒートシールバーを設けて、そのヒートシールバーを、図５に示すように一定の間隔でビン口形の注出通路２０を有する縦シール部４ｂを形成するためのシール手段として機能させ、第３縦シール部形成部を、その縦シール部４ｂ間に生じた隙間１３を覆うようにヒートシールして各縦シール部４ｂを繋ぐ、繋ぎシール部１４を形成するためのシール手段として機能させる。
　この場合には、第３縦シール部形成部によるヒートシール部の長さを適宜変更することで、製造する製品の縦方向長さ（製品ピッチ）に合わせて装置を取り替える必要がなく、製品ピッチの異なる各種の製品を同じ装置を使って製造することができる。
　なお、第３縦シール部形成部は、例えば充填包装機のメインコンピュータとして機能する制御手段に入力された包装用フィルムＦの走行速度や第２縦シール部形成部５の回転数、ヒートシールバーの長さや製品ピッチなどの生産条件に基づいて、駆動モータを回転制御させることにより適宜の長さに縦シール部を形成することができる。
　第１ヒートシールロール（金属製ヒートシールロールと、表面がシリコンゴムからなるヒートシールロールとの組み合わせ）と第２ヒートシールロール（一対の金属製ヒートシールロール）を用いて下記の各条件下で、包装体Ｗの縦シール部４ｂからなる背貼り接合部上に、易剥離シール部４ａを有する注出通路２０を形成した。
　なお、包装体Ｗはいずれも、袋幅：５４ｍｍ、袋ピッチ：５０ｍｍ（上下横シール部：６ｍｍ×２を含む、内寸３８ｍｍ）であり、被包装物として水を５ｇ充填した。
　各包装体Ｗについて、図６に示すように平坦な下面板１５上に背貼り接合部（縦シール部４ｂ）を中心として２つに折り畳んで載置するとともに、これを平坦な上面板１６によって注出通路２０内の易剥離シール部４ａが剥離するまで押圧することにより開封強度を測定した。その結果を表１および２に示す。なお、評価基準は下記とした。
　×：液漏れ発生
　△：２．０ｋｇｆ未満
　〇：２．０ｋｇｆ以上５．０ｋｇｆ未満
　▲：５．０ｋｇｆ以上
（条件１）
　包装用フィルム：ＮＹ１５μｍ／ＬＬＤＰＥ４０μｍ
　シリコンゴム：厚み３ｍｍ、硬度９０度
　充填速度：１２ｍ／ｍｉｎ
　第１ヒートシールロールのロール間距離：調整なし
（条件２）
　包装用フィルム：ＮＹ１５μｍ／ＬＬＤＰＥ４０μｍ
　シリコンゴム：厚み３ｍｍ、硬度９０度
　充填速度：１２ｍ／ｍｉｎ
　設定温度：９５℃
　第１ヒートシールロールのロール間距離：調整あり
　シール幅：２．４ｍｍ、１．０ｍｍ、０．５ｍｍ
　第１ヒートシールロールの押圧力　：調整あり
　上記において、ロール間距離がマイナスとなっているのは、金属ロールがゴムロールに食い込んだ状態を示している。
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
　上記実施形態の充填包装機によれば、表１の結果から、易剥離シール部４ａの形成可能な温度幅が広く、ヒートシール温度を調整することで安定して易剥離シール部を形成することができることがわかった。また表２の結果から、ロール間のクリアランス調整を行うことにより低い押圧力で易剥離シール部を形成することができること、また押圧力を上げることでロール間のクリアランス調整を行わなくても易剥離シール部を形成することができることがわかった。
１　フィルム案内部　　２　フィルム折返し部　　３　第１縦シール部形成部　　３ａ　縦シールロール　　４ａ　易剥離シール部　　４ｂ　縦シール部　　５　第２縦シール部形成部　　５ａ　縦シールロール　　６　被包装物供給部　　７　第１横シール部形成部　　７ａ　横シールロール　　８　横シール部　　９　第２横シール部形成部　　９ａ　横シールロール　　１０　切断部　　１１　弾性材料　　１２　横シールロール表面　　１３　隙間　　１４　繋ぎシール部　　１５　下面部　　１６　上面部　　１７、１７’　シールバー　　１８　ガイドロッド　　１９、１９’　シールバー　　２０　注出通路　　２１　基材        　　２２、２２ａ、２２ｂ　被覆材　　Ｆ　包装用フィルム　　Ｗ　包装袋

Claims (6)

  1. 　原反ロールから繰り出し走行される包装用フィルムを、接着層もしくはシーラント層が対向するように中央部で折り返し、その側縁部分に、包装用フィルムの長手方向に連続的に縦シール部を形成して筒状とする縦シール手段と、
    該筒状の包装用フィルム内に液状の被包装物を充填しながら、包装用フィルムの長手方向に直交する方向に、包装用フィルムの全幅にわたって延在する横シール部を、包装用フィルムの長手方向に間隔をおいて形成して包装体を形成する横シール手段と、
    を備え、前記縦シール部上に易剥離シールされてなる注出通路を有する包装体を製造するための充填包装機において、
    前記縦シール手段が、第１縦シール部形成部と第２縦シール部形成部とを有し、
    該第１縦シール部形成部によって包装用フィルムの側縁部分に連続的に易剥離シール部を形成した後、該易剥離シール部上に、第２縦シール部形成部によって、一部にビン口形の非シール部分を有する縦シール部を形成し、
    前記第１縦シール部形成部が、少なくとも一方の表面が金属よりも軟質の弾性材料によって形成されてなる一対のヒートシールロールまたはヒートシール板を有していることを特徴とする充填包装機。
  2. 　前記第１縦シール部形成部は、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板からなり、金属材料からなる該ヒートシールロールまたはヒートシール板の表面が、研磨加工、ブラスト加工または孔加工されていることを特徴とする請求項１に記載の充填包装機。
  3. 　前記第２縦シール部形成部が、ビン口形の切欠きを有するヒートシールバーが設けられた一対のヒートシールロールまたはヒートシール板からなり、前記縦シール手段が、前記第２縦シール部形成部の後方位置に、第２縦シール部形成部によって形成されたシール部間をヒートシールするための第３縦シール部形成部を有していることを特徴とする請求項１または２に記載の充填包装機。
  4. 　前記縦シール部が背貼り接合部であると共に、
    　前記横シール手段が、第１横シール部形成部と第２横シール部形成部とを有し、
    　該第１横シール部形成部および第２横シール部形成部の少なくとも一方は、少なくとも背貼り接合部側の表面が金属よりも軟質の弾性材料によって形成されてなる一対のヒートシールロールまたはヒートシール板を有していることを特徴とする請求項１～３のいずれか１項に記載の充填包装機。
  5. 　前記第１横シール部形成部および第２横シール部形成部の少なくとも一方は、一方の表面が金属よりも軟質の弾性材料からなり、他方が金属材料によって構成されてなる一対のヒートシールロールまたはヒートシール板からなり、該金属材料からなるヒートシールロールまたはヒートシール板の表面に、包装用フィルムの走行方向に対し垂直な方向に延在する溝加工が施されていることを特徴とする請求項４に記載の充填包装機。
  6. 　前記金属よりも軟質の弾性材料が、２層以上の積層構造を有することを特徴とする請求項１～５のいずれか１項に記載の充填包装機。
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