US20070029434A1 - Fixed-width towpreg apparatus and process - Google Patents

Fixed-width towpreg apparatus and process Download PDF

Info

Publication number
US20070029434A1
US20070029434A1 US11/327,396 US32739606A US2007029434A1 US 20070029434 A1 US20070029434 A1 US 20070029434A1 US 32739606 A US32739606 A US 32739606A US 2007029434 A1 US2007029434 A1 US 2007029434A1
Authority
US
United States
Prior art keywords
towpreg
width
core
spool
shaped body
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.)
Abandoned
Application number
US11/327,396
Inventor
David Rasmussen
Ronald Roser
Joseph Barlow
Kirk Samowitz
Kurt Olsen
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.)
Zoltek Companies Inc
Original Assignee
Zoltek Companies Inc
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 Zoltek Companies Inc filed Critical Zoltek Companies Inc
Priority to US11/327,396 priority Critical patent/US20070029434A1/en
Assigned to ZOLTEK COMPANIES INC. reassignment ZOLTEK COMPANIES INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RASMUSSEN, DAVID E., BARLOW, JOSEPH L., ROSER, RONALD R., SAMOWITZ, KIRK J.
Publication of US20070029434A1 publication Critical patent/US20070029434A1/en
Abandoned legal-status Critical Current

Links

Images

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]
    • 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
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/62—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis
    • B29C53/66—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis with axially movable winding feed member, e.g. lathe type winding
    • 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
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
    • B29C53/8016—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
    • 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
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
    • B29C53/8016—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners
    • B29C2053/8025—Storing, feeding or applying winding materials, e.g. reels, thread guides, tensioners tensioning

Definitions

  • This invention relates to an apparatus and method for manufacturing constant-width tow fibers (“tow” or “towpreg”), which are preferably resin-impregnated.
  • An embodiment of this invention is an apparatus for winding a towpreg, comprising a spool winding machine comprising a rod-shaped body for mounting a core of a spool, wherein the core is shuttled on the rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body.
  • the apparatus could further comprise a spool shuttling carriage.
  • the apparatus could further comprise a towpreg delivery head.
  • the apparatus could further comprise a grooved roller that allows control of a width of the towpreg.
  • the apparatus could further comprise a towpreg cooling device.
  • the apparatus wherein the towpreg cooling device is a towpreg cooling tunnel.
  • the towpreg cooling device is a towpreg chiller.
  • the apparatus could further comprise a towpreg width measurement device.
  • the apparatus could further comprise a towpreg speed regulation device for regulating a travel speed of the towpreg.
  • the grooved roller has a groove of a desired width and rotates in a direction of travel of the towpreg at a rotational speed resulting in a surface speed at the groove that is slower than the travel speed of the towpreg.
  • Another embodiment is a method for winding a towpreg, comprising impregnating the towpreg with a resin and winding the towpreg on a core of a spool while simultaneously shuttling the core on a rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body.
  • the packaging spool core is shuttled back and forth on a rod-shaped body, e.g., a spline-type support shaft, in a pattern-controlled motion, allowing the fiber to proceed in a straight-line substantially normal to the axis of the rod-shaped body, through the impregnation and spooling process.
  • a rod-shaped body e.g., a spline-type support shaft
  • fibers are brought from a creel through an impregnation zone.
  • the towpreg is shaped to a desired width by passing the towpreg over one or more grooved rollers, with the grooved rollers rotating in the direction of fiber travel, but at a slightly slower surface speed than the travel speed of the towpreg.
  • This differential speed provides the benefits that one could achieve by passing the towpreg over a fixed bar for width control of the towpreg, but further provides a self-cleaning feature that is absent in a fixed bar due to the rotation of the grooved rollers.
  • the towpreg could be passed over and under a number of fixed impregnating bars to assist impregnation of the resin between the fibers of the towpreg and, at the same time over the grooved rollers to establish a width in accordance with the dimension of the grooves of the grooved rollers.
  • the towpreg With the towpreg at a desired width after being impregnated with resin and traversing through the groove of the grooved rollers, in one embodiment the towpreg then passes through a refrigerated tunnel where its temperature is lowed by air convection.
  • This chilling step substantially fixes or freezes the towpreg width as it goes into the next stage of the process which could be a puller.
  • the puller could include two or more relatively large rotating drums having grooves and sidewalls.
  • the rotating drums could be liquid chilled and could pull the towpreg through the entire process up to the location of the rotating drums. Sidewalls on the rotating drum grooves fix the final width of the towpreg by restricting width-expansion due to fiber tension normal forces.
  • Variations of the preferred embodiment of this embodiment of the claimed apparatus could include a tow sizing unit, tow width measurement unit, tow heating unit, flattening/guide rollers, tow sizing wheel and pressure roller and cooling devices as those disclosed in U.S. Pat. No. 5,397,523, which is incorporated in entirety herein by reference.
  • the claimed apparatus could potentially be used for any fiber including glass, carbon, aramid, boron, ceramic, and basalt.
  • the towpreg cross-section may be varied from a rectangular to an oval, each of various dimensions.
  • the spool winder itself could be a programmable filament-winding machine that is programmed to rotate the spool winder in a particular winding configuration.
  • the oscillating carriage of the winder does not move the delivery head of the towpreg, but rather it shuttles the towpreg spool core back and forth on a spline. Shuttling of the spool core allows the towpreg to maintain a straight path.
  • An axial stationary rotating eye head orients the fiber band properly for winding it on the traversing core.
  • FIG. 1 A diagram of the apparatus of the preferred embodiment of this invention is shown in FIG. 1 , wherein a resin impregnated towpreg travels from the right to the left during the process of winding the towpreg.
  • a resin impregnated towpreg travels from the right to the left during the process of winding the towpreg.
  • Width-control impregnation rollers Heated and rotating at a slower surface speed than that of the fiber travel.
  • Towpreg cooling tunnel Air refrigerated and thermostatically controlled with fans to create air turbulence for increase heat transfer.
  • Controlled tow properties include tow width, height, density, and fiber resin ratio. Quality issues include non-wrinkling of the fibers and non-breaking of the fibers in the process. These various properties are measured by the following tests:
  • Width of the towpreg is measured with a laser micrometer and the resultant data may be recorded and analyzed. Typical data from quality control procedures is listed in the table below: Manufacture Process Spool Width Standard Date Batch # Identification (mm) Deviation Aug. 30, 2005 117 1A 16.75 0.162 Aug. 30, 2005 117 1E 16.39 0.188 Aug. 30, 2005 117 2A 16.67 0.125 Aug. 30, 2005 117 2D 16.47 0.166 Aug. 31, 2005 117 3A 16.65 0.066 Aug. 31, 2005 117 3C 16.47 0.204 Sep. 1, 2005 117 4A 16.63 0.082 Sep. 1, 2005 117 4B 16.61 0.079 Sep. 1, 2005 117 5A 16.6 0.104 Sep. 1, 2005 117 5E 16.43 0.143 Sep.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Winding Filamentary Materials (AREA)

Abstract

An apparatus and method for winding a towpreg having a spool winding machine having a rod-shaped body for mounting a core of a spool, wherein the core is shuttled on the rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body are disclosed.

Description

    RELATED APPLICATION
  • This application claims benefit from U.S. Provisional Application No. 60/641,749, filed Jan. 7, 2005, entitled “FIXED-WIDTH TOWPREG APPARATUS AND PROCESS,” which is incorporated herein by reference.
    • FIELD OF INVENTION
  • This invention relates to an apparatus and method for manufacturing constant-width tow fibers (“tow” or “towpreg”), which are preferably resin-impregnated.
    • BACKGROUND OF INVENTION
  • There are a number of challenges involved in manufacturing a constant-width towpreg. Conventional processes of manufacturing a resin-impregnated towpreg require that the towpreg be oscillated back and forth for spooling onto a core of a spool. As a result of handling the towpreg in this way, one of the problems is that that the resin-impregnated fiber tow tends to vary its width, particularly because it is oscillated back and forth for spooling onto the core. The present invention avoids most of the problems that typically tend to vary the tow width.
    • SUMMARY OF THE INVENTION
  • An embodiment of this invention is an apparatus for winding a towpreg, comprising a spool winding machine comprising a rod-shaped body for mounting a core of a spool, wherein the core is shuttled on the rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body. The apparatus could further comprise a spool shuttling carriage. The apparatus could further comprise a towpreg delivery head. The apparatus could further comprise a grooved roller that allows control of a width of the towpreg. The apparatus could further comprise a towpreg cooling device. The apparatus wherein the towpreg cooling device is a towpreg cooling tunnel. Preferably, the towpreg cooling device is a towpreg chiller. The apparatus could further comprise a towpreg width measurement device. The apparatus could further comprise a towpreg speed regulation device for regulating a travel speed of the towpreg. Preferably, the grooved roller has a groove of a desired width and rotates in a direction of travel of the towpreg at a rotational speed resulting in a surface speed at the groove that is slower than the travel speed of the towpreg.
  • Another embodiment is a method for winding a towpreg, comprising impregnating the towpreg with a resin and winding the towpreg on a core of a spool while simultaneously shuttling the core on a rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body.
    • DETAILED DESCRIPTION OF THE INVENTION
  • One of the features of the spool winder of this invention is that the packaging spool core is shuttled back and forth on a rod-shaped body, e.g., a spline-type support shaft, in a pattern-controlled motion, allowing the fiber to proceed in a straight-line substantially normal to the axis of the rod-shaped body, through the impregnation and spooling process. This facilitates accurate width control of the product, an important benefit for material that is to be used in precise fiber placement operations.
  • In a preferred embodiment of the towpreg process of this invention, fibers are brought from a creel through an impregnation zone. Once impregnated with resin, the towpreg is shaped to a desired width by passing the towpreg over one or more grooved rollers, with the grooved rollers rotating in the direction of fiber travel, but at a slightly slower surface speed than the travel speed of the towpreg. This differential speed provides the benefits that one could achieve by passing the towpreg over a fixed bar for width control of the towpreg, but further provides a self-cleaning feature that is absent in a fixed bar due to the rotation of the grooved rollers. Optionally, the towpreg could be passed over and under a number of fixed impregnating bars to assist impregnation of the resin between the fibers of the towpreg and, at the same time over the grooved rollers to establish a width in accordance with the dimension of the grooves of the grooved rollers.
  • With the towpreg at a desired width after being impregnated with resin and traversing through the groove of the grooved rollers, in one embodiment the towpreg then passes through a refrigerated tunnel where its temperature is lowed by air convection. This chilling step substantially fixes or freezes the towpreg width as it goes into the next stage of the process which could be a puller. The puller could include two or more relatively large rotating drums having grooves and sidewalls. The rotating drums could be liquid chilled and could pull the towpreg through the entire process up to the location of the rotating drums. Sidewalls on the rotating drum grooves fix the final width of the towpreg by restricting width-expansion due to fiber tension normal forces.
  • Variations of the preferred embodiment of this embodiment of the claimed apparatus could include a tow sizing unit, tow width measurement unit, tow heating unit, flattening/guide rollers, tow sizing wheel and pressure roller and cooling devices as those disclosed in U.S. Pat. No. 5,397,523, which is incorporated in entirety herein by reference.
  • The claimed apparatus could potentially be used for any fiber including glass, carbon, aramid, boron, ceramic, and basalt. With shape variations in the drum and roller grooves, the towpreg cross-section may be varied from a rectangular to an oval, each of various dimensions.
    • EXAMPLES
  • The spool winder itself could be a programmable filament-winding machine that is programmed to rotate the spool winder in a particular winding configuration. In the preferred embodiment of this invention, the oscillating carriage of the winder does not move the delivery head of the towpreg, but rather it shuttles the towpreg spool core back and forth on a spline. Shuttling of the spool core allows the towpreg to maintain a straight path. An axial stationary rotating eye head orients the fiber band properly for winding it on the traversing core.
  • A diagram of the apparatus of the preferred embodiment of this invention is shown in FIG. 1, wherein a resin impregnated towpreg travels from the right to the left during the process of winding the towpreg. In particular the details of the component of the towpreg winding apparatus of FIG. 1 are provided below:
  • (A) Width-control impregnation rollers: Heated and rotating at a slower surface speed than that of the fiber travel.
  • (B) Towpreg cooling tunnel: Air refrigerated and thermostatically controlled with fans to create air turbulence for increase heat transfer.
  • (C) Towpreg chiller/puller and fiber-length measurement: Puller has width and shape control grooves. Length measurement is accomplished with the attachment of a revolution counter or encoder.
  • (D) Laser micrometer tow-width measurement and/or mass measurement with commercially available gamma or beta gage mass measurement systems and data logging.
  • (E) Machine take-up speed-regulation dancer wheel to maintain tow tension between puller and winder.
  • (F) Rotating eye delivery head to orient the fiber at a proper angle for helical winding at the spool.
  • (G) Spool winding machine and splined shaft spindles for traversing core spooling. Multiple spindles may be used by incorporating a slip-clutch drive to all but the master spindle, to maintain tension in all spooling.
  • (H) Spool shuttling carriage controlled by a winding pattern for a programmed helical or circumferential wind.
  • Test Methods and Results
  • Controlled tow properties include tow width, height, density, and fiber resin ratio. Quality issues include non-wrinkling of the fibers and non-breaking of the fibers in the process. These various properties are measured by the following tests:
      • A) Weighing and measuring specific lengths of processed towpreg. With a known fiber weight per length before impregnation, this test determines fiber resin ratio as well as a towpreg density when coupled with dimensional data.
      • B) Solvent washout of the uncured resin by hanging a tow section in a laboratory cylinder of solvent. This test is used to observe fiber breakage since broken fibers will fall down in the cylinder as the supporting resin is dissolved out with a solvent such as acetone.
      • C) Panel testing. This test involves manufacturing of test panels using the produced material and then running various tests such as tension, bending, and impact, to determine strength translation of the fibers into finished products.
      • D) Fiber wet-out observation. For a towpreg to effectively function as intended, good wet-out must occur at the impregnation part of the process. Wet-out can be observed by manually pulling samples of the towpreg apart to observe dry streaks if they exist.
  • E) Width of the towpreg is measured with a laser micrometer and the resultant data may be recorded and analyzed. Typical data from quality control procedures is listed in the table below:
    Manufacture Process Spool Width Standard
    Date Batch # Identification (mm) Deviation
    Aug. 30, 2005 117 1A 16.75 0.162
    Aug. 30, 2005 117 1E 16.39 0.188
    Aug. 30, 2005 117 2A 16.67 0.125
    Aug. 30, 2005 117 2D 16.47 0.166
    Aug. 31, 2005 117 3A 16.65 0.066
    Aug. 31, 2005 117 3C 16.47 0.204
    Sep. 1, 2005 117 4A 16.63 0.082
    Sep. 1, 2005 117 4B 16.61 0.079
    Sep. 1, 2005 117 5A 16.6 0.104
    Sep. 1, 2005 117 5E 16.43 0.143
    Sep. 12, 2005 118 1A 16.486 0.217
    Sep. 12, 2005 118 1E 16.368 0.242
    Sep. 12, 2005 118 2A 16.536 0.087
    Sep. 12, 2005 118 2D 16.477 0.171
    Sep. 13, 2005 118 3A 16.578 0.105
    Sep. 13, 2005 118 3C 16.56 0.145
    Sep. 13, 2005 118 4A 16.604 0.096
    Sep. 13, 2005 118 4B 16.542 0.174
    Sep. 13, 2005 118 5A 16.597 0.154
    Sep. 13, 2005 118 5B 16.447 0.203
    Sep. 14, 2005 118 6A 16.63 0.108
    Sep. 14, 2005 118 6D 16.376 0.172
    Sep. 14, 2005 118 7A 16.62 0.111
    Sep. 14, 2005 118 7C 16.59 0.113

Claims (18)

1. An apparatus for winding a towpreg, comprising a spool winding machine comprising a rod-shaped body for mounting a core of a spool, wherein the core is shuttled on the rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body.
2. The apparatus of claim 1, further comprising a spool shuttling carriage.
3. The apparatus of claim 2, further comprising a towpreg delivery head.
4. The apparatus of claim 2, further comprising a grooved roller that allows control of a width of the towpreg.
5. The apparatus of claim 4, further comprising a towpreg cooling device.
6. The apparatus of claim 5, wherein the towpreg cooling device is a towpreg cooling tunnel.
7. The apparatus of claim 5, wherein the towpreg cooling device is a towpreg chiller.
8. The apparatus of claim 5, further comprising a towpreg width measurement device.
9. The apparatus of claim 4, further comprising a towpreg speed regulation device for regulating a travel speed of the towpreg.
10. The apparatus of claim 9, wherein the grooved roller has a groove of a desired width and rotates in a direction of travel of the towpreg at a rotational speed resulting in a surface speed at the groove that is slower than the travel speed of the towpreg.
11. A method for winding a towpreg, comprising impregnating the towpreg with a resin and winding the towpreg on a core of a spool while simultaneously shuttling the core on a rod-shaped body to allow the towpreg to maintain a straight path substantially normal to an axis of the rod-shaped body.
12. The method of claim 11, further comprising shaping the towpreg to a desired width by passing the towpreg through a groove of a grooved roller.
13. The method of claim 12, further comprising passing the towpreg through a cooling device.
14. The method of claim 13, wherein the towpreg cooling device is a towpreg cooling tunnel.
15. The method of claim 11, further cooling the towpreg by contacting a rotating drum.
16. The method of claim 13, further comprising regulating a travel speed of the towpreg by a speed regulation device.
17. The method of claim 16, wherein the grooved roller has a groove of a desired width and rotates in a direction of travel of the towpreg at a rotational speed resulting in a surface speed at the groove that is slower than the travel speed of the towpreg.
18. The method of claim 11, further comprising passing the towpreg through a delivery head prior to the winding the towpreg on the core.
US11/327,396 2005-01-07 2006-01-09 Fixed-width towpreg apparatus and process Abandoned US20070029434A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/327,396 US20070029434A1 (en) 2005-01-07 2006-01-09 Fixed-width towpreg apparatus and process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US64174905P 2005-01-07 2005-01-07
US11/327,396 US20070029434A1 (en) 2005-01-07 2006-01-09 Fixed-width towpreg apparatus and process

Publications (1)

Publication Number Publication Date
US20070029434A1 true US20070029434A1 (en) 2007-02-08

Family

ID=36648181

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/327,396 Abandoned US20070029434A1 (en) 2005-01-07 2006-01-09 Fixed-width towpreg apparatus and process

Country Status (3)

Country Link
US (1) US20070029434A1 (en)
EP (1) EP1833650A2 (en)
WO (1) WO2006074313A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140373051A1 (en) * 2010-12-13 2014-12-18 Samsung Electronics Co., Ltd. Method and apparatus for informing occurrence of event of communication terminal in digital tv
US11845233B1 (en) 2019-08-13 2023-12-19 Keith McConnell Precision tow impregnation manufacturing system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011082192B4 (en) * 2011-09-06 2022-10-06 Bayerische Motoren Werke Aktiengesellschaft Process and device for producing prepregs from winding processes
GB2537402B (en) 2015-04-16 2018-11-21 Lentus Composites Ltd Composite manufacturing method and apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3441235A (en) * 1966-02-10 1969-04-29 Interim Corp Take-up reel
US5397523A (en) * 1993-07-20 1995-03-14 Cincinnati Mliacron Inc. Method and apparatus for sizing composite tows

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140373051A1 (en) * 2010-12-13 2014-12-18 Samsung Electronics Co., Ltd. Method and apparatus for informing occurrence of event of communication terminal in digital tv
US11845233B1 (en) 2019-08-13 2023-12-19 Keith McConnell Precision tow impregnation manufacturing system

Also Published As

Publication number Publication date
EP1833650A2 (en) 2007-09-19
WO2006074313A2 (en) 2006-07-13
WO2006074313A3 (en) 2007-09-27

Similar Documents

Publication Publication Date Title
US6096164A (en) Multiple axes fiber placement machine
US20070029434A1 (en) Fixed-width towpreg apparatus and process
US8443581B2 (en) Method and apparatus for producing optical fiber
CN1090548A (en) Produce, process and reel a kind of thermoplastic plastic wire rod and provide the method for quality signal and up-coiler
US11099345B2 (en) Method of winding optical fiber, method of manufacturing bobbin-wound optical fiber, optical fiber winder, and method of manufacturing optical fiber strand
KR100192848B1 (en) Package of tape non-twisted carbon fiber bundle
JP2016528129A (en) Microduct tube winder, double station winder, processing system for empty microduct plastic tube, and method for winding such a tube
CN110325352B (en) Method for producing resin-impregnated fiber bundle wound body
KR101086106B1 (en) Apparatus for winding carbon fiber strand
US9676659B2 (en) Method of manufacturing an optical fiber
JPH01298257A (en) In-line densification of knitted structure
CN114315125B (en) Preparation process of non-twist polarization maintaining optical fiber
JP2004209923A (en) Filament winding device
JP2007185827A (en) Filament winding apparatus
US3249312A (en) Method and apparatus for winding strand material
JP2005161797A (en) Manufacturing method and manufacturing apparatus for prepreg
JP2014148573A (en) Method for manufacturing tow prepreg
RU2738529C1 (en) Production line for composite long products and bent reinforcement elements
KR20040024645A (en) Optical fiber drawing equipment having break failure reduction device by controlling the curvature radius of the optical fiber
JP2004175611A (en) Method and apparatus for manufacturing optical fiber
JPH04119123A (en) Fiber tow, method for winding fiber tow and winder
CN117984546B (en) High-speed drawing method for small-diameter optical fiber
CN112236291B (en) Method for producing a fiber-reinforced component and device for carrying out the method
JP2004083351A (en) Method for manufacturing optical fiber and equipment therefor
JP2004090352A (en) Method for manufacturing tow prepreg and its manufacturing apparatus

Legal Events

Date Code Title Description
AS Assignment

Owner name: ZOLTEK COMPANIES INC., MISSOURI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:RASMUSSEN, DAVID E.;ROSER, RONALD R.;BARLOW, JOSEPH L.;AND OTHERS;REEL/FRAME:018311/0637;SIGNING DATES FROM 20060406 TO 20060418

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION