US3450094A - Continuous strand pressure impregnator - Google Patents

Continuous strand pressure impregnator Download PDF

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Publication number
US3450094A
US3450094A US673689A US3450094DA US3450094A US 3450094 A US3450094 A US 3450094A US 673689 A US673689 A US 673689A US 3450094D A US3450094D A US 3450094DA US 3450094 A US3450094 A US 3450094A
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United States
Prior art keywords
pressure
fluid
reservoir
impregnating
strands
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Expired - Lifetime
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US673689A
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English (en)
Inventor
Richard C Bryan
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Crompton and Knowles Corp
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Crompton and Knowles Corp
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D06B3/20—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics with means to improve the circulation of the treating material on the surface of the fabric
    • D06B3/201—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics with means to improve the circulation of the treating material on the surface of the fabric the treating material being forced through the textile material

Definitions

  • the invention is particularly adapted for coating and pressure impregnating continuous strands or bundles of glass filaments with a liquid thermosetting resin.
  • the impregnation of the glass fiber strands requires that resin penetrate the strand bundles between individual filaments.
  • a common method of coating and impregnating glass strands is by drawing them through an open tank containing impregnating resin and an orifice of a size to allow the coated strand to pass therethrough with the proper amount of resin. Because of the viscosity and tenacity of the resin, the strands carry the resin forward thus causing a pileup of resin near the orifice. This creates a deficit of resin at the other end of the tank and reduces the effective length of immersion of the strand in the resin. This method also does not create pressure to force resin between filaments.
  • Other systems for impregnating fibrous products are known which make use of conveying tubes to insure suflicient exposure in the impregnating fluid but provide no means to aid the impregnating process with pressure.
  • Another object of the invention is to provide apparatus which enables the fluid which is adhesively dragged by the motion of the textile strands through the impregnating fluid to control the pressure of the fluid.
  • a more specific object of the invention is to provide means to adjust the pressure of the impregnating fluid.
  • impregnator tubes which connects an impregnating fluid filled reservoir to a pressure chamber.
  • the filamentary strands pass through the impregnating fluid in the reservoir through the impregnator tubes and into the pressure chamber thereby adhesively dragging some of the fluid toward the chamber.
  • the strands are drawn from the pressure chamber through an orifice which allows some of the impregnating fluid to pass through the orifice with the strands.
  • the amount of impregnating fluid passing through the orifice in this fashion is less than the amount entering the pressure chamjber ithrough the impregnator tubes.
  • the forward movement of fluid keeps the pressure chamber full and forces the excess fluid back to the reservoir via a return tube, thereby creating pressure in the pressure 3,450,094 Patented June 17, 1969 ice chamber.
  • This pressure plus the long emersion of the strands in the fluid filled tubes enables the fluid to thoroughly impregnate the strands.
  • the pressure in the chamber can be varied by varying the conditions under which the excess fluid must return to the reservoir. This can be done by restricting the flow of fluid, either by altering the diameters of the impregnator and return tubes or by placing a gate or the like in the tubes. An increase in the angle of the return tube and height of the reservoir will increase the pressure in the chamber.
  • FIGURE 1 is a longitudinal cross section of the impregnating apparatus with one means of varying the pressure in the pressure chamber;
  • FIGURE 2 is a vertical section on line 2-2 of FIG- URE 1 showing the impregnator and return tubes in cross section; i
  • FIGURE 3 is a fragmentary view of the return tube with a modified means of varying the pressure in the pressure chamber
  • FIGURE 4 is a fragmentary view of a portion of the pressure chamber and means to indicate the amount of pressure in the chamber.
  • the impregnating apparatus is generally indicated by the reference numeral 10.
  • This apparatus has a reservoir 12 in which is maintained a supply of impregnating fluid such as resin.
  • This fluid is indicated by the reference character R.
  • a pressure chamber 14 is spaced from the reservoir and is connected thereto by impregnating tubes 16.
  • each of the impregnating tubes 16 opens at 18 into the reservoir near the bottom thereof.
  • the other ends of the tubes 16 open at 20 into the pressure chamber.
  • the tubes are shown at a slight upward angle from the reservoir to the pressure chamber to increase the drag of the impregnating fluid on the strands, but this is not essential for the operation of the apparatus.
  • One end of a return tube 22 is connected to an overflow opening 24 in pressure chamber 14 and the other end to an opening 26 in reservoir 12.
  • the filamentary strands F to be impregnated enter the reservoir from a supply source (not shown) over guiding grooves 28 in the rounded edge 30 of the reservoir.
  • the strands are then trained around a guide or roll 32 near the bottom of the reservoir and are pulled through the impregnator tubes 18 into the pressure chamber 14 and then out through an outlet orifice 34 to either be collected on a beam 36 or for immediate use.
  • Beam 36 can be driven by any conventional drive means much as v a motor 38.
  • the strands As the strands are pulled through the reservoir they adhesively drag some of the impregnating fluid into the impregnator tubes and then into the pressure chamber.
  • the amount of fluid drawn through the impregnator tubes 16 from the reservoir to the pressure chamber exceeds the amount of fluid leaving through orifice 34 with the strands F.
  • the continued influx of fluid into the chamber keeps it full and maintains the pressure of the fluid therein.
  • the excess amount of fluid is forced back to the reservoir through return tube 22 by the continued influx of fluid from the impregnator tubes 16.
  • the impregnator tubes enable the strands to be submerged in the impregnating fluid for a sutficient length of time and the pressure chamber provides the necessary pressure for impregnation of the strands.
  • the strands move through the impregnator tubes, they are subjected to an increasing amount of pressure therein due to the resistance of the fluid in the pressure chamber and the continued flow of fluid from the reservoir. This provides for gradual and uniform impregnation of the strands.
  • Return tube 22 is shown at a slight uphill angle from the pressure chamber to the reservoir.
  • the greater the angle of the return tube the more pressure that is required to move the fluid therethrough.
  • the greater the pressure that is required to move the impregnating fluid through the return tube the greater the pressure that will be created in the pressure chamber and the impregnator tubes.
  • This pressure can also be increased by restricting the flow of fluid through the return tube.
  • a return tube having a smaller internal diameter could be used.
  • One convenient way of restricting the flow of fluid is to provide an adjustable gate 40 at the point where the return tube 22 opens into the reservoir at 26.
  • Gate 40 is shown mounted near the upper edge of the inner wall 42 of the reservoir by bolts 44. Slots 46 in wall 42 of the reservoir allow the gate 40 to be adjusted vertically.
  • gate 40 By loosening bolts 44, gate 40 can be adjusted so that the bottom edge 48 of the gate will block as much of opening 26 as is necessary to restrict the return flow of impregnating fluid through return tube 22. The amount of blockage will be determined by the amount of pressure that it is desired to be maintained in chamber 14. Once the desired setting is achieved, bolts 44 can be tightened.
  • valve 50 is installed on the return tube.
  • Valve 50 can be of any commercial type which will restrict the flow of material therethrough and which can be adjusted by a turn screw or the like 52.
  • FIGURE 4 there is shown a calibrated transparent measuring tube 54 which is inserted into the pressure chamber 14 for measuring the pressure therein.
  • the impregnating fluid will rise into the measuring tube to a height which will vary with the pressure.
  • the calibrations can be arranged so that pressure can be read directly from the tube if it is so desired.
  • the invention is particularly useful for impregnating strands of glass filaments with resin but it may also be used for other types of fiber or filamentary strands which require impregnation with other types of impregnating fluid.
  • the invention provides for lengthy emersion of strands in impregnating fluid under pressure. It is contemplated therefore that the invention can be used for a large range of continuous filamentary strand impregnation problems. It is also contemplated that the pressure can be adjusted in several difierent ways, other than the example shown, by those skilled in the art.
  • An apparatus for pressure impregnating strands of filamentary material comprising, in combination:
  • said adjustable means is a battle plate slidably mounted adjacent the opening of said return tube into said reservoir, whereby the size of said opening can be varied to vary the flow of impregnating fluid.
  • said adjustable means is a pressure valve located between the ends of said return tube, whereby the flow of impregnating fluid through said return tube can be varied to maintain a predetermined pressure reading.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
US673689A 1967-10-09 1967-10-09 Continuous strand pressure impregnator Expired - Lifetime US3450094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67368967A 1967-10-09 1967-10-09

Publications (1)

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US3450094A true US3450094A (en) 1969-06-17

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Application Number Title Priority Date Filing Date
US673689A Expired - Lifetime US3450094A (en) 1967-10-09 1967-10-09 Continuous strand pressure impregnator

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US (1) US3450094A (fr)
BE (1) BE760085Q (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674113A (en) * 1951-07-06 1954-04-06 American Enka Corp Apparatus for liquid treatment of warps of closely spaced parallel rayon threads
CH324451A (de) * 1954-04-01 1957-09-30 Karl Dipl Ing Zuber Verfahren und Vorrichtung zum Lackieren von Bleistiften

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674113A (en) * 1951-07-06 1954-04-06 American Enka Corp Apparatus for liquid treatment of warps of closely spaced parallel rayon threads
CH324451A (de) * 1954-04-01 1957-09-30 Karl Dipl Ing Zuber Verfahren und Vorrichtung zum Lackieren von Bleistiften

Also Published As

Publication number Publication date
BE760085Q (fr) 1971-05-17

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