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WO1982002369A1 - Recipient moule par soufflage et son procede de fabrication - Google Patents

Recipient moule par soufflage et son procede de fabrication Download PDF

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Publication number
WO1982002369A1
WO1982002369A1 PCT/US1981/000056 US8100056W WO8202369A1 WO 1982002369 A1 WO1982002369 A1 WO 1982002369A1 US 8100056 W US8100056 W US 8100056W WO 8202369 A1 WO8202369 A1 WO 8202369A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
preform
handle
ring
plastic
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.)
Ceased
Application number
PCT/US1981/000056
Other languages
English (en)
Inventor
Mortimer Stafford Thompson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AU72225/81A priority Critical patent/AU7222581A/en
Priority to EP81901411A priority patent/EP0069730A1/fr
Priority to PCT/US1981/000056 priority patent/WO1982002369A1/fr
Publication of WO1982002369A1 publication Critical patent/WO1982002369A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/10—Handles
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B29C2949/0723—Preforms or parisons characterised by their configuration having variable wall thickness at flange portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0761—Preforms or parisons characterised by their configuration characterised by the shape characterised by overall the shape
    • B29C2949/0763—Axially asymmetrical
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0776—Closure retaining means not containing threads
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/0778—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the flange
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/079—Auxiliary parts or inserts
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/079—Auxiliary parts or inserts
    • B29C2949/0793—Transport means
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • 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
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/463—Grips, handles

Definitions

  • the invention is concerned with plastic containers produced by blow molding. Of particular interest is blow molding as carried out over the lower range of permissible temperature so as to result in biaxial orientation.
  • Plastic containers that is, containers constructed primarily of substituted or unsubstituted hydrocarbons have, for some time, been in prevalent use. Increased popularity, as compared with inorganic glasses, is due to a variety of factors--inter alia, improved impact resistance, reduced weight, and, perhaps most significantly, reduced cost.
  • blow molding A most sophisticated form of blow molding is now becoming commercially significant. It differs from earlier procedures in that the parison is first stretched and then blown while its temperature is much lower than with conventional processes--generally, within the 100°F (ca, 40°C) range above T (the temperature at which the plastic material passes from the glass phase to the rubber phase).
  • This procedure which is known as stretchblow molding, or orientation blow molding, is not only replacing more conventional procedures, but is opening up new markets. Advantages of the new procedures are all related to biaxial orientation of the polymer material.
  • the parison while at a temperature insufficient to permit free plastic fiw is expanded biaxially to conform with the blow mold.
  • the temperature of operation generally within the 100°F (ca. 40°C) range immediately above T c is such that expansion introduces true strain into the material.
  • the strain translated into a definable polymer orientation results in a number of attributes.
  • Suitable container materials are substituted and unsubstituted thermoplastic hydrocarbons. Commonly used materials at this time include acrylonitrile, polyethylene terephthalate, and polypropylene. The described procedures are well known--descriptions are included in standard reference texts. See, for example, Modern Plastics Encyclopedia, Vol. 54, No. 10A, 1977-1978, McGraw-Hill Publishing Co.
  • Blown containers of the invention include handles integral with the container. Handles are an integral part of the parison or preform being affixed at a single plane normal to the major axis of the parison outside the region to be blown. Material waste is thereby minimized and container design freedom maximized. In addition, such handle regions may serve as gripping regions during blowing and for support during filling and capping. Stretch-blow processes in accordance with the invention provide opportunity to biorient a maximum portion of the parison and container.
  • Handle configurations may be simple bar-shaped, L-shaped, T-shaped, or may even return to result in double joinder on the same parison plane. They may serve for pouring or carrying.
  • Preferred embodiments of the invention are directed to handles with lower extremities somehow affixed to a blown portion of the container.
  • Species include those in which such second joinder is accomplished mechanically as by use of encircling hands, labels and the like but also include embodiments in which joinder at least partially results from handle-interlocking, and/or bonding with a blown region.
  • FIGS. 1A and IB are perspective views, respectively, of a parison and a broken section in perspective of the corresponding blown container provide with a "T" bar .
  • FIGS 2, 3, and 4 are perspective views of handle portions of blown structures alternate to that of FIG. IB and are provided, respectively, with a single joinder loop, a double joinder loop, and an "L" carrier.
  • FIGS. 5A and 5F are plan views and 5B through
  • FIGS. 6A, 6B, and 6C are a broken plan view and sectional views, respectively, of configurations alternative to those of FIGS, 5,
  • FIGS. 7A, 7B and 7C are a broken plan view and sectional views, respectively, which depict another alternative to those of FIGS, 5.
  • FIGS. 10A and 10E are plan views and 10B, 10C and 10D are sectional views all depicting an embodiment in which a pouring handle is formed on a blown bottle with the lower extremity being attached by spin-welding.
  • FIGS, 11A, 11B, 11C, and 12A, 12B, all section except 11A in plan, are views illustrative of spinwelding attachment of lower handle extremity alternative to that of FIGS. 10A through 10E.
  • FIGS, 13A in section, 13B in plan, and 13C in section are views illustrative of embodiments in which a handle, part of the upper region of the parison before. blowing, is return-bonded to a blown region of a container by any of a variety of bonding techniques alternative to spin-welding.
  • FIGS, 14A, 14B, 14C, and 14D are, respectively, a top, a front, and sectional view of a parison including a projecting "L" handle and, finally, of the corresponding portion of the blown container,
  • FIGS, 15A and 15B are sectional views of a parison at two sta.ges during processing in which a handle is deformed from a straight bar to an "L",
  • FIGS, 16A, 16B and 16C are top front and sectional views of a parison corresponding with 14A, 14B, and 1-4C, and 16D a section view of a blown, container corresponding with 14D but in which the "L" handle is provided with a shaped extremity which facilitates bonding to a blown region of the container; and
  • FIGS, 17A through 17C are sectional and plan views of blow molding and ancillary apparatus suitable for th.e fabrication of the configuration of FIG. 16D.
  • molding may take the traditional form with temperature significantly above the glass-rubber transition temperature or it may be carried out at reduced temperature, generally within the range of from T c to T c plus 100°F (ca, 40°C) to result in biaxial orientation.
  • T c to T c plus 100°F (ca, 40°C) results so long as the temperature of the plastic material is sufficiently low to result in biaxial orientation sometime during—not necessarily throughout—expansion, FIGS.
  • 1A and' IB are a perspective view of a parison 1 and of a broken portion of blow molded container 2 produced from such parison 1,
  • the '"T" bar carrying handle 3 is an integral portion of parison 1, being molded as a portion of a ring 4 about the entire periphery of parison 1, Ring 4 may serve for gripping during blowing.
  • FIG. 2 is a view of a blown container illustrative of a carrying handle configuration alternative to that depicted in FIG.1B.
  • the "T" is replaced by a loop which is a part of ring portion 11 of a parison which when blown results in a container of which 12 is a portion.
  • FIG. 3 again of a form corresponding with FIG.1B, is illustrative of a form of carrying handle 20 of loop configuration which returns to ring section 21 at two regions, 22 and 23.
  • the entire loop configuration, an integral part of the parison, is unaffected in the blowing operation which results in the blown container of which 24 is a section,
  • FIG. 4 depicts another structure alternative to that of 1B, this time produced from a parison molded in a form to include "L" handle 30 attached to ring portion 31 resulting in a blown container 32.
  • FIGS, 5A and 5B depict a parison 40 including an "L" handle region 41 of the general configuration of that shown in FIG. 4.
  • the lower extremity of that "L" handle 41 is of such configuration as to expedite attachment to the blown container 42,
  • the configuration provides for a notches extremity 43 to facilitate bonding.
  • The. blow mold may have, provision for insertion of the notched region of handle 41 so that it, in effect, becomes a portion of the inner surface of the blow mold during blowing. In this manner, the sidewall is blown against, into and around the configuration of the handle end to secure a gripping attachment. To facilitate the molding of the sidewall into such configurations, it may be desirable to vibrate .the handle end tc promote slippage and/or generate heat,
  • FIG. 5D is a detailed view of this arrangement.
  • FIG. 5E is a detailed view of the same region shown in FIG. 5D but showing a section through a plane or orthogonal to that of FIG. 5D.
  • the undercut notch of extremity 43 is clearly seen.
  • the distorted region of blown container 42 conforming to the notch is also visible.
  • FIG. 5F is a top plane view showing handle 41, as well as the neck region of parison 40 and the blown container 42.
  • FIGS. 6A, 6B, and 6C are illustrative of a configuration in which a handle region 50, again, facilitates connectio.n with blown container wall 51 by interlocking, but which, in contradistinction to handle extremity 43 of FIG. 5, constitutes the male rather than female member of the pair.
  • wall 51 is distorted to meet with 50 with distortion being produced during blowing
  • Male projecting region 52 is shown in phantom in elevational view 6A.
  • FIGS. 6B and 6C are, again representations on planes orthogonal one to the other.
  • FIGS, 7A through 7C correspond in form with those of FIGS 6A through 6C and depict a structure in which a lower extremity of handle 60 is shaped at 62 to mate with blown wall 61,
  • FIGS 8A through 8C are views corresponding with those of FIGS, 6 and 7.
  • the handle in this instance designated as member 70, is provided with an undercut configuration 71 which results in firm mating resistant of all anticipated stress directions contemplated during a normal pouring operation,
  • FIGS. 9A through 9C depict handle 80 which mates with blown container wall 81 at region 82, again, with a shaped pattern designed to result in a high integrity joinder
  • FIGS. 10A through 10E are illustrative of a joinder procedure for welding a handle which may otherwise be of the general configuration shown in any of the figures immediately preceding. Welding is due to friction produced upon rotation of a plastic member, the procedure being known as spin-welding,
  • the parison here denoted 90 is provided with a handle 91 which is injection molded to include a button region 92 which is attached to the remainder of handle 91 only by regions 93, easily severed to be spun by an appropriate tool to produce a friction to blown side wall 94 at weld area 95,
  • FIGS. 11A through 11C depict a structure alternative to that of FIG. 10A through. 10E, again, a parison, not shown, includes a handle 101 which, in this instance, is bonded by means of a. separate button 102 so as to bond to blown side wall 1Q3 in the region of weld area 104.
  • a handle end 111 is bonded to a blown side wall 112 over a weld region 113 by means of an attacked button 114 which is easily severed.
  • bonding is by friction produced by means of a rotating tool, not shown.
  • FIGS. 13A through 13C are included to depict a procedure for bonding a lower handle extremity to a blown container by any of several bonding procedures ineluding gas welding, ultrasonic welding, high frequency bonding, e.tc.
  • a handle end 121 is bonded to a blown container side wall 122 via a thin wafer 123 which serves as the bonding medium.
  • the thin wafer may simply be a lower melting point material (than that of the material from which handle 121 and side wall 122 are composed) or may be provided with filler which increases the absorption cross-section for some form of energy utilized for bonding.
  • Bonding procedures which may be utilized may include simple heating, or may take the form of ultrasonic vibration, or of high frequency electric or magnetic fields designed to produce heating in wafer 123 or at its interface with the sidewall.
  • suitable bonding agents may be applied between the wafer 123 and sidewall 122 which may be activated by the various energy sources described above.
  • FIGS. 14A through 14D are, respectively, plane front and side views in section of a parison handle 131 which is an integral portion of ring region 132 of parison 133.
  • the final blown configuration shown in FIG, 14D shows the blown side wall 134 and handle and ring regions 131 and 132, respectively, unchanged.
  • the final configuration is generally that depicted in FIG. 4,
  • FIGS. 15A and 15B are included as illustrative of an expedient procedure for producing an "L"-shaped handle.
  • a bar handle 141 attached to ring portion 142 of parison 143 is deformed by means not shown by deforming bar handle 141 to produce orthogonal handle region 144.
  • Deformation produced by simple pressure during or subsequent to any otherwise orthodox molding step is expedited by enlarged handle region 145 which, due to residual heat, is selectively deformed,
  • region 145 may be of lesser thickness and heated to achieve localized deformation in order to achieve the desired "L" shape.
  • a handle region 151 again, part of a ring section 152 of preform 153 forms an "L" configuration, this tine with a lower extremity region 154 which is, itself, reduced in cross-section so as to facilitate insertion and sealing of the handle end in a suitable slot in the blow mold (shown in FIGS. 17A through 17C).
  • the reduced cross-section creates shoulders around the periphery of the handle end which seal the slot against "blow outs" of container wall 155 which can result in region 156 from a desirable loose fit in the slot and the high pressures of the blowing gas, FIGS.
  • FIG. 17A through 17C depict apparatus and operation suitable for the prepaiation of the configuration of FIG, 16D,
  • the handle region 161 with reduced extremity 162 again, forming a portion of ring region 163 is forced into an aperture 164 provided in blow mold 165 by handle depressor 166 prior to expansion of preform 167 resulting from pressure introduced by blow air hole 168.
  • Processing in accordance with the invention invariably contemplates a blowing step in which a preform is expanded to conform with a mold.
  • the general procedure is well known and is described, for example, in the reference set forth, under prior art,
  • the type of blowing operation of primary concern from the inventive standpoint results in biorientation of polymer molecules, Biorientation can only occur over a range of temperatures within which some part of the stress, applied during blowing produces strain in the polymer. It has been indicated that this requirement is met in many polymer materials if blowing is carried out within a finite temperature range above.
  • T c is assigned its conventional meaning of the temperature representing the. transition from the glass phase to the rubber phase produced upon heating of the polymer.
  • An acceptable range for biorientation—i,e., for stretch blow molding in the usual case, does not exceed 100°F (ca. 40oC) above T c .
  • handles as integral portions of plastic bottles require attainment of adequate fusion temperature.
  • handles have been produced by parison pinch-off necessarily requiring attainment of fusion temperature.
  • proj ections have been molded by appropriately shaped molds as an integral part of the operation.
  • a preform or parison
  • the projection is the result of a unitary molding operation—generally, an injection molding operation.
  • Known preferred alternatives may resuit of a unitary molding operation—generally, an in jection molding operation.
  • Known preferred alternatives may result in such projection attached by welding or other means, for example, to an extruded preform.
  • the projection eventually to serve as a handle, may expeditiously be attached at a thickened region ultimately to serve as a gripping section for subsequent blow molding.
  • the thickened portion generally required for the blow molding operation offers the additional structural integrity desired for a stress point resulting from handle usage.
  • Such gripping sections are necessarily close to an. extremity of the preform and inherently meet the first requirement of the invention—i,e., that preform—handle attachment be at a region outside of the main section of the blow- mold and that the blown container shape and/or size be essentially unaffected by the inclusion of the handle.
  • FIGS, 1 through 4 A variety of embodiments are shown, for example, in FIGS, 1 through 4, All such embodiments share the common feature of preform-handle attachment being restricted to a region approximately corresponding with but a single plane which is normal to the major axis of the preform.
  • handle attachment may be made to more than one point on the plane.
  • FIGS, 5, 6, 7, 8, and 9 Another embodiment provides for mechanical attachment of the lower handle extremity.
  • This may take the form of a band or even a label which may contain the printed matter identifying the contents of the container.
  • Embodiments represented, for example, by FIGS, 5, 6, 7, 8, and 9, involve a procedure in which only a minor modification is required in the blowing mold.
  • an aperture in the mold is filled by the lower handle extremity so that the expanding preform conforms to such extremity in the same manner as it does to the mold.
  • temperatures attained during blowing, particularly during stretch blowing are insufficient to result in adequate bond strength.
  • the approach followed to overcome this problem in accordance with the invention may take the form of a complex shaped lower handle extremity to result in a mated pair with the corresponding wall region.
  • Undercut configurations are considered particularly advantageous.
  • undercutting takes the form of opposing surface regions including a mate portion having a thickness decrease in an outward direction of at least 10 percent within the region intruding into the mold
  • a corresponding configuration makes use of opposing inner wall regions defining at least a 10 percent increase in a void dimension over the length of handle extremity intruding into the mold.
  • Keying intinacy may be assured by providing Keying intimacy may be assured by providing .means for vibrating the handle extremity during the blowing operation. This is especially true in biorientation processes where temperatures are low and plastic stretching and moldability is more difficult to achieve. Such vibration promotes slippage of the side wall into the keyed configurations as well as generates localized heating in the sidewall to promote stretch and moldability.
  • Integrity of joinder may be improved by a variety of bonding techniques.
  • An expeditious form of bonding may involve chemical modification of the plastic, for example, by cross-linking.
  • This cross-linking or curing which may be induced by radiation of suitable quantum energy may result from polymer cross-linking, for example, by inclusion of a difunctional curing medium—or for that matter, by any medium of greater polyfunctionality.
  • Local conductive heating is generally not preferred, particularly as practiced in stretch blow molding, since excessive heat conducted through the stretched side- wall results in degradation of those properties dependent upon biaxial orientation and release of orientation stress may result in collapse of the sidewall, possibly with its rupture.
  • the handle extremity shown in FIGS. 13A through 13C represents a valuable embodiment in accordance with the invention which enables the use of local conductive heating.
  • the handle extremity possesses a very thin section abutting the sidewall. This section may be heated sufficiently to fuse itself to the sidewall without generating sufficient heat content to substantially effect a deterioration of the thicker sidewall.
  • bonding may result by use of a separate adhesive, for example, by use of a hot melt adhesive.
  • a separate adhesive for example, by use of a hot melt adhesive.
  • This too, while sometimes suitable, may be nonpreferred, since (a) affective adhesives for many suitable blow molding plastics are unavailable, and (b) since use of an adhesive increases fabrication cost.
  • Bonding by whatever means may serve, itself, to result in joining of the lower handle extremity or may be used in conjunction with other embodiments, for example, with many of the undercut mating embodiments described above.
  • Plastic a category of organic materials, generally thermoplastic, substituted or unsubstituted, hydrocarbons—examples are polyolefin, such as polypropylene, and polyesters, such as polyethylene terephthalate, T c : (glass transition) temperature at which the plastic changes from a glassy state to a rubbery state. Molding operations are invariably carried out substantially above T c —generally at temperatures at least 100°F (ca. 40°C) in excess. Preferred embodiments herein which depend upon biaxial orientation are carried out with the plastic in the rubbery state But over a lower range, generally within 100°F (ca. 40°C) of T c .
  • Molding that category of procedures in which plastic material is caused to flow into the interstices of the mold to result in a formed object which becomes rigid upon cooling.
  • Preform (occasionally referred to as parison). the molded form which, in the procedures of the invention, is formed preliminary to expansion to produce, the final object and, therefore, a form somewhat smaller than, that of the final object.
  • the preform is produced with the plastic at an elevated tempera- ture in excess of 100°F (ca, 40°C) above T c .
  • Injection molding that molding procedure. generally utilized to produce the preform.
  • plastic materials introduced as particulate matter by a screw or ram with or without external heating is brought to elevated temperature so that it is introduced as a flowing plastic condition under pressure into a mold to produce the preform.
  • Connecting passages known as runners are common.
  • Compression or Transfer molding One of the more common alternatives to injection molding to produce the handle in which a mass of plastic is h.eated and is introduced into a mold portion. Whereafter, an additional mold portion, such as a plunger, distorts the mass to cause it to conform, again, with the interstices of the new completed mold.
  • Blow molding This term contemplates expansion of the preform to its final configuration by the use of gas under pressure. This requires use of a blow mold. As practiced in the past, no effort was made to change the temperature of the preformed plastic before or during the blowing operation. Some reduction in temperature naturally results from contact with the preform mold.
  • Injection blow molding Procedure in which the preform is molded by injection.
  • Stretch blow molding Blow molding in which the preform is stretched often by means of an inserted plunger prior to blowing. The procedure is recognized as advantageously practiced with the plastic material within a temperature range close to but above T so as to result in extension of the polymer molecules from their natural twisted state to an extended state with the major molecular axis as resolved lying in the direction of stretch. Blowing is carried out within the same temperature range designed to result in retained orientation and produces orientation in the blow direction so that the resulting final configuration is "biaxially oriented.”
  • Injection stretch blow molding A procedure by which, the preform is produced by injection molding with. subsequent stretch blow molding to form the final configuration.
  • biaxial orientation may be detected, destructively, by heating. Heating the blown section to temperatures well below that required for flow of unoriented material—temperatures as low as
  • polymeric (or plastic) material satisfactory for use are hydrocarbons or substituted hydrocarbons. Materials include the simple unsubstituted homopolymers, polypropylene and polystyrene, substituted polymers, such as, acrylonitriles, and polyesters, such as polyethylene terephthalate. Biaxial orientation implies a suitable, average polymer weight. Sufficient polymer weight (molecular size), generally, inherent in the specification of a normally solid room temperature polymer of satisfactory mechanical properties is likely to average at least 10,000. and is unlikely to exceed one or a few million molecular weight.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Un recipient moule par soufflage (2) est forme a partir d'une preforme ou paraison (1) ayant une portion de goulot avec une poignee solidaire (3) qui comprend un anneau (4) s'etendant sensiblement autour du goulot de la paraison (1). La poignee (3) peut avoir differentes formes et permet de saisir et lever le conteneur (2) et d'en verser le contenu tout en distribuant les contraintes causees par ces operations autour de l'anneau (4). Le procede consiste a former la preforme (1) avec la poignee solidaire (3) et l'anneau (4) dispose entre les extremites de la preforme (1), a placer la preforme (1) dans le moule de soufflage (165), a maintenir l'anneau (4) de maniere a situer et limiter le mouvement de la preforme (1) dans celui-ci et a dilater la preforme (1) sous l'anneau (4) pour former le conteneur (2).
PCT/US1981/000056 1981-01-15 1981-01-15 Recipient moule par soufflage et son procede de fabrication Ceased WO1982002369A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU72225/81A AU7222581A (en) 1981-01-15 1981-01-15 Blow moulded container and method of manufacture
EP81901411A EP0069730A1 (fr) 1981-01-15 1981-01-15 Recipient moule par soufflage et son procede de fabrication
PCT/US1981/000056 WO1982002369A1 (fr) 1981-01-15 1981-01-15 Recipient moule par soufflage et son procede de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOUS81/00056810115 1981-01-15
PCT/US1981/000056 WO1982002369A1 (fr) 1981-01-15 1981-01-15 Recipient moule par soufflage et son procede de fabrication

Publications (1)

Publication Number Publication Date
WO1982002369A1 true WO1982002369A1 (fr) 1982-07-22

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AU (1) AU7222581A (fr)
WO (1) WO1982002369A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530015A1 (de) * 1985-08-22 1987-02-26 Schenk Helga Fluessigkeitsbehaelter mit giessstutzen und schraubverschluss
WO1996025283A1 (fr) * 1995-02-15 1996-08-22 Jose Santoyo Padilla Preforme avec poignee integree pour emballages obtenus par injection-soufflage ou par injection-soufflage bioriente
WO1996033063A1 (fr) * 1995-04-20 1996-10-24 Glenn Robert Beale Conteneur realise d'une piece avec une poignee, preforme et procede de fabrication
EP0764588A1 (fr) * 1995-09-22 1997-03-26 Owens-Brockway Plastic Products Inc. Récipient en plastique avec une poignée flexible intégrale ainsi que procédé et appareil pour sa fabrication
EP0775639A1 (fr) * 1995-11-27 1997-05-28 A.K. Technical Laboratory, Inc., Bouteille munie d'une anse et procédé de fabrication de cette bouteille par étirage-soufflage
EP0856472A3 (fr) * 1997-01-31 1998-08-26 A.K. Technical Laboratory, Inc., Bouteille avec poignée de transport
WO1999057026A1 (fr) * 1998-04-30 1999-11-11 A.K. Technical Laboratory, Inc. Bouteille a orientation biaxiale pourvue d'une poignee
AU720887B2 (en) * 1995-04-20 2000-06-15 Bealetec Pty Ltd Container with integral handle, preform and method of manufacture
FR2793214A1 (fr) * 1999-05-07 2000-11-10 Perrier Vittel Man Et Technolo Bouteille en plastique prevue pour recevoir une poignee et outillage pour sa fabrication
WO2003018413A1 (fr) * 2001-08-24 2003-03-06 Sig Blowtec Gmbh & Co. Kg Contenant a poignee destine a recevoir des liquides
ES2199629A1 (es) * 2001-03-30 2004-02-16 De Lujan Guillermo Caballero Preforma perfeccionada para envases.
AU2005203451B2 (en) * 2005-08-03 2012-03-01 Nissei Asb Machine Co., Ltd. Container with handle, preform with handle, and method and device for molding container with handle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB818618A (en) * 1957-07-29 1959-08-19 Purex Corp Ltd Improvements in or relating to bottle handle structures
US3115682A (en) * 1959-12-12 1963-12-31 Owens Illinois Glass Co Apparatus for making composite plastic articles
US3140329A (en) * 1962-05-22 1964-07-07 Beacon Plastics Corp Attachment means
US3163544A (en) * 1962-03-06 1964-12-29 Emery I Valyi Container
DE1912249A1 (de) * 1969-03-06 1970-09-24 Andre Savary Verfahren zur Herstellung von Arretierungsstopfen und hiernach hergestellter Stopfen,insbesondere fuer Arzneimittelbehaelter
US4273246A (en) * 1979-04-10 1981-06-16 Thompson Mortimer S Bottles with attached handles and a method of forming the same
US4280859A (en) * 1978-02-14 1981-07-28 Thompson Mortimer S Method of manufacturing a blow-molded container with an integral handle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB818618A (en) * 1957-07-29 1959-08-19 Purex Corp Ltd Improvements in or relating to bottle handle structures
US3115682A (en) * 1959-12-12 1963-12-31 Owens Illinois Glass Co Apparatus for making composite plastic articles
US3163544A (en) * 1962-03-06 1964-12-29 Emery I Valyi Container
US3140329A (en) * 1962-05-22 1964-07-07 Beacon Plastics Corp Attachment means
DE1912249A1 (de) * 1969-03-06 1970-09-24 Andre Savary Verfahren zur Herstellung von Arretierungsstopfen und hiernach hergestellter Stopfen,insbesondere fuer Arzneimittelbehaelter
US4280859A (en) * 1978-02-14 1981-07-28 Thompson Mortimer S Method of manufacturing a blow-molded container with an integral handle
US4273246A (en) * 1979-04-10 1981-06-16 Thompson Mortimer S Bottles with attached handles and a method of forming the same

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3530015A1 (de) * 1985-08-22 1987-02-26 Schenk Helga Fluessigkeitsbehaelter mit giessstutzen und schraubverschluss
WO1996025283A1 (fr) * 1995-02-15 1996-08-22 Jose Santoyo Padilla Preforme avec poignee integree pour emballages obtenus par injection-soufflage ou par injection-soufflage bioriente
EP0732187A1 (fr) * 1995-02-15 1996-09-18 Jose Santoyo Padilla Préforme à poignée intégrée pour récipients fabriqués par injection-soufflage ou par injection-soufflage bi-orienté
ES2120841A1 (es) * 1995-02-15 1998-11-01 Santoyo Padilla Jose Preforma con asa integrada para envases obtenidos por inyeccion soplado o por inyeccion y soplado biorientado.
AU720887B2 (en) * 1995-04-20 2000-06-15 Bealetec Pty Ltd Container with integral handle, preform and method of manufacture
WO1996033063A1 (fr) * 1995-04-20 1996-10-24 Glenn Robert Beale Conteneur realise d'une piece avec une poignee, preforme et procede de fabrication
EP0822891A4 (fr) * 1995-04-20 1999-02-10 Glenn Robert Beale Conteneur realise d'une piece avec une poignee, preforme et procede de fabrication
EP0764588A1 (fr) * 1995-09-22 1997-03-26 Owens-Brockway Plastic Products Inc. Récipient en plastique avec une poignée flexible intégrale ainsi que procédé et appareil pour sa fabrication
EP0775639A1 (fr) * 1995-11-27 1997-05-28 A.K. Technical Laboratory, Inc., Bouteille munie d'une anse et procédé de fabrication de cette bouteille par étirage-soufflage
US5862929A (en) * 1995-11-27 1999-01-26 A.K. Technical Laboratory, Inc. Bottle having a handle formed by stretch blow molding
AU722130B2 (en) * 1995-11-27 2000-07-20 A. K. Technical Laboratory, Inc. A bottle having a handle formed by stretch blow molding
US6227393B1 (en) 1997-01-31 2001-05-08 A. K. Technical Laboratory, Inc. Biaxially stretched bottle having carrying handle
EP0856472A3 (fr) * 1997-01-31 1998-08-26 A.K. Technical Laboratory, Inc., Bouteille avec poignée de transport
WO1999057026A1 (fr) * 1998-04-30 1999-11-11 A.K. Technical Laboratory, Inc. Bouteille a orientation biaxiale pourvue d'une poignee
US6305564B1 (en) 1998-04-30 2001-10-23 A. K. Technical Laboratory, Inc. Biaxially stretched bottle having a carrying handle
CN1085174C (zh) * 1998-04-30 2002-05-22 株式会社青木固研究所 带承载手柄的双轴拉伸瓶
FR2793214A1 (fr) * 1999-05-07 2000-11-10 Perrier Vittel Man Et Technolo Bouteille en plastique prevue pour recevoir une poignee et outillage pour sa fabrication
WO2000067989A1 (fr) * 1999-05-07 2000-11-16 Perrier Vittel Management Et Technologie Bouteille en plastique prevue pour recevoir une poignee et outillage pour sa fabrication
ES2199629A1 (es) * 2001-03-30 2004-02-16 De Lujan Guillermo Caballero Preforma perfeccionada para envases.
ES2199629B1 (es) * 2001-03-30 2005-05-01 Guillermo Caballero De Lujan Preforma perfeccionada para envases.
WO2003018413A1 (fr) * 2001-08-24 2003-03-06 Sig Blowtec Gmbh & Co. Kg Contenant a poignee destine a recevoir des liquides
AU2005203451B2 (en) * 2005-08-03 2012-03-01 Nissei Asb Machine Co., Ltd. Container with handle, preform with handle, and method and device for molding container with handle

Also Published As

Publication number Publication date
AU7222581A (en) 1982-08-02
EP0069730A1 (fr) 1983-01-19

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