US3551255A - Device for forming ribbons of resin-impregnated strands of filaments - Google Patents

Device for forming ribbons of resin-impregnated strands of filaments Download PDF

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Publication number
US3551255A
US3551255A US625702A US3551255DA US3551255A US 3551255 A US3551255 A US 3551255A US 625702 A US625702 A US 625702A US 3551255D A US3551255D A US 3551255DA US 3551255 A US3551255 A US 3551255A
Authority
US
United States
Prior art keywords
strands
resin
filaments
ribbons
synthetic resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US625702A
Other languages
English (en)
Inventor
Christian Ragettli
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.)
Metal Containers Ltd
Original Assignee
Metal Containers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB12997/66A external-priority patent/GB1120041A/en
Application filed by Metal Containers Ltd filed Critical Metal Containers Ltd
Application granted granted Critical
Publication of US3551255A publication Critical patent/US3551255A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
    • B29C70/523—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement in the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1715—Means joining indefinite length work edge to edge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1722—Means applying fluent adhesive or adhesive activator material between layers
    • Y10T156/1727—Plural indefinite length or running length workpieces
    • Y10T156/1732—Fluid applied to plural workpieces

Definitions

  • a device for forming ribbons of resin-impregnated strands of filaments for use in making filament wound vessels including a plate-shaped member having a series of laterally spaced grooves which converge at the exit end and a series of passages to provide synthetic resin to each groove individually.
  • the present invention relates to filament wound vessels and, more particularly, to a method and means for forming a ribbon composed of a plurality of synthetic resinimpregnated strands of filaments for use in forming filament wound vessels such as containers, tubes and conduits.
  • the ribbons should be compact in character.
  • the compactness will, of course, vary depending upon the end use to which the vessel is to be put; but it is generally necessary to provide ribbons which do not have any substantial voids or interstices between individual strands.
  • An object of the present invention is to provide a method and means for bringing together individual strands of filaments to form ribbons for use in filament winding while controlling the amount of synthetic resin that is applied to the strands.
  • Another object of this invention is to provide a method and means for forming ribbons of the above-described type characterized by their compactness and substantially coplanar nature.
  • a still further object is to provide the method and means for forming ribbons of the above-described type wherein the supply of synthetic resin to the individual strands is controlled so that there are no localized excesses on the strands comprising the ribbon.
  • a related object is to provide a method and means for assuring that a necessary amount of synthetic resin is supplied to each individual strand so that the ribbons formed have substantially no voids or interstices.
  • FIG. 1a is a plan view of the entry end of a device for forming compact ribbons of synthetic resin-impregnated strands of filaments in accordance with this invention
  • FIG. 1b is a plan view of the central portion of the device illustrated in FIG. 1a;
  • FIG. 1c is a plan view of the exit end of the device illustrated in FIG. In;
  • FIG. 2 is a cross-sectional view taken along the line 2-2 of FIG. 1a illustrating a part of the means for supplying synthetic resin to the strands;
  • FIG. 3 is a cross-sectional view taken along the line 33 of FIG. 1b showing the inlet part of the means of supplying synthetic resin to the strands;
  • FIG. 4 is a cross-sectional view taken along line 44 of FIG. 1c illustrating the area in the exit end of the device shown in FIG. 1a and adjacent the inlet for the synthetic resin;
  • FIG. 5 is a cross-sectional view taken along the line 55 of FIG. 1a showing the width of a groove in the entry end of the device illustrated in FIG. 1a;
  • FIG. 6 is a cross-sectional view taken along the line 66 of FIG. lb illustrating the decreased width of a groove in the central portion of the device illustrated in FIG. 1;
  • FIG. 7 is a cross-sectional view taken along the line 77 of FIG. 10 showing the further decreased width of a groove in the exit end of the device illustrated in FIG. 1.
  • FIGS. 1a through 10 illustrate an exemplary device for forming ribbons from strands of filaments according to this invention.
  • a plurality of strands are first formed into substantially a coplanar relationship with the individual strands being spaced a lateral distance from each other.
  • a plurality of strands are forwarded to the device of this invention in a coplanar relationship and spaced a lateral distance from each other.
  • Such strands are then passed through the device of this invention so that the coplanar and lateral distance relationships are initially maintained.
  • the portion of the device of this invention illustrated in FIG. 1a includes a plate-shaped member 10 having a series of laterally spaced grooves 12 extending from the entry and, indicated at 14, through the exit end shown in FIG. 1c.
  • the exemplary device illustrated is adapted to accommodate 20 strands; however only four grooves have been illustrated. The remaining grooves are represented only by their chain dotted center lines.
  • the strands forwarded by means not shown, enter the plate-shaped member 10 at the entry end indicated at 14 and are maintained both in a coplanar relationship and a lateral distance from each other by moving each of the strands into a particular groove.
  • the lateral distance between the strands is continuously decreased while the strands are moved through a finite longitudinal distance until adjacent strands are substantially contiguous to each other.
  • the laterally spaced grooves 12 converge towards each other; and, at the exit end, indicated at 16, the adjacent strands are substantially contiguous with respect to each other.
  • the strands are preferably composed of glass fibers and the synthetic resin is an epoxy resin,
  • the synthetic resin is applied to each of the strands individually after the strands have begun to move through the finite longitudinal distance previously described.
  • synthetic resin is introduced through an inlet opening 18 as shown in FIGS. 1b and 3 which is adapted to be connected to a source of synthetic resin (not shown).
  • the inlet opening 18 can be formed in a socket which also can constitute the means for mounting the device of this invention on the winding machine to be used in the formation of filament wound vessels.
  • the means for supplying synthetic resins to the grooves 12 further includes a central transporting canal 20 connected to the inlet opening 18 and extending towards the entry end of the device of this invention.
  • the central resin transporting canal 20 Adjacent the entry end of the device of this invention the central resin transporting canal 20 has a pair of lateral passages 22 which branch outwardly from the canal and pass under the grooves 12 of the device.
  • the resin feed passages 24 extend from the lateral passages 22 and each open into one of the grooves 12.
  • the central transporting canal 20 can be threaded as indicated at 26 so that a plug for closing the end can be introduced. Adequate control of the amount of resin supplied to each of the strands, and thus the ribbon itself, can easily be effected by merely controlling the amount of resin fed to the inlet opening.
  • the synthetic resin applied to the strands is maintained in contact with the individual strand while the strands are moving through the finite longitudinal distance that has been hereinbefore described.
  • the sythetic resin that has been introduced through the feed passages 24 is maintained in contact by the physical presence of the grooves 12 as the strands move through the device of this invention. This allows the impregnation of the individual strands to be carried out with uniform application and no localization of resin.
  • the amount of resin that is maintained in contact with the individual strand while the strands are moving through the finite longitudinal distance is decreased in a step-wise fashion.
  • the width of each of the grooves 12 decreases from the entry end to the exit end while the depth of the grooves remains substantially uniform.
  • the decrease in width of the grooves is accomplished in a step-Wise form so that the shoulders immediately surrounding the beginning of the decreased width can serve to hold back large drops of synthetic resin and act as a scraping device to prevent an excess of resin from penetrating to the narrow exit end of the grooves 12 to prevent clogging the exit end.
  • the width of the grooves 12 is successively decreased from the entry end to the exit end as indicated at 28 and 30.
  • the present invention has provided a method and means for forming ribbons composed of a plurality of strands of filaments which meet all of the requirements for use in forming a filament wound vessel.
  • the ribbons formed are compact in nature, have substantially no void area or interstices and are coplanar.
  • the impregnation of the strands with synthetic resin is accomplished individually and in such a manner that individual strands .do not receive any excesses yet the strands are uniformly impregnated.
  • a device for forming a compact ribbon of strands of filaments impregnated with synthetic resin which comprises first means to maintain a plurality of strands in a substantially coplanar relationship and spaced a lateral distance from each other, second means connected to said first means to cause the lateral distance between the strands to gradually decrease while moving the strands through a finite longitudinal distance until adjacent strands are substantially contiguous to each other and third means to apply synthetic resin to impregnate each strand individually after the strand has began moving through the finite longitudinal distance, said second means being capable of maintaining the applied synthetic resin in contact with the individual strand while the strands are being moved through the finite longitudinal distance.
  • a device for forming a compact ribbon of strands of filaments impregnated with a synthetic resin which comprises a plate-shaped member, said plate-shaped member having a series of grooves extending the longitudinal dimension of said plate-shaped member and which are located a lateral distance from each other at the entry end and are converged at the exit end of said plate-shaped member and means for supplying synthetic resin to said grooves adjacent the entry end.
  • said means for supplying synthetic resin to said grooves includes an inlet opening adapted to be connected to a source of the synthetic resin, 2. central resin transporting canal connected to said inlet opening, lateral passages branching from said central resin transporting canal and resin feed passages extending from said lateral passages and each opening into one of the grooves adjacent the entry end of the plateshaped member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Reinforced Plastic Materials (AREA)
  • Coating Apparatus (AREA)
  • Moulding By Coating Moulds (AREA)
US625702A 1966-03-24 1967-03-24 Device for forming ribbons of resin-impregnated strands of filaments Expired - Lifetime US3551255A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12997/66A GB1120041A (en) 1966-03-24 1966-03-24 Device for impregnating strands of filaments with synthetic resin

Publications (1)

Publication Number Publication Date
US3551255A true US3551255A (en) 1970-12-29

Family

ID=10014944

Family Applications (1)

Application Number Title Priority Date Filing Date
US625702A Expired - Lifetime US3551255A (en) 1966-03-24 1967-03-24 Device for forming ribbons of resin-impregnated strands of filaments

Country Status (5)

Country Link
US (1) US3551255A (fr)
BE (1) BE696091A (fr)
ES (1) ES128595Y (fr)
FR (1) FR1515593A (fr)
SE (1) SE318398B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714756A1 (fr) * 1993-08-17 1996-06-05 Polyplastics Co. Ltd. Appareil, procede et filiere de revetement pour la production d'une composition thermoplastique renforcee par des fibres longues

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA989288A (en) * 1972-09-07 1976-05-18 Raymond W. Meyer Continuous strand sheet molding compound and method for making

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0714756A1 (fr) * 1993-08-17 1996-06-05 Polyplastics Co. Ltd. Appareil, procede et filiere de revetement pour la production d'une composition thermoplastique renforcee par des fibres longues
EP0714756A4 (fr) * 1993-08-17 1996-07-31 Polyplastics Co Appareil, procede et filiere de revetement pour la production d'une composition thermoplastique renforcee par des fibres longues
US5783129A (en) * 1993-08-17 1998-07-21 Polyplastics Co., Ltd. Apparatus, method, and coating die for producing long fiber-reinforced thermoplastic resin composition

Also Published As

Publication number Publication date
DE1704822B2 (de) 1975-10-30
BE696091A (fr) 1967-09-01
ES128595Y (es) 1968-01-01
FR1515593A (fr) 1968-03-01
SE318398B (fr) 1969-12-08
DE1704822A1 (de) 1971-05-19
ES128595U (es) 1967-07-16

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