NL1036355C2 - Reinforcement fiber supplying method for pipe producing machine, involves limiting distance between location where fiber are issued and surface of object such that fiber retain on specific orientation while drop down - Google Patents

Reinforcement fiber supplying method for pipe producing machine, involves limiting distance between location where fiber are issued and surface of object such that fiber retain on specific orientation while drop down Download PDF

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Publication number
NL1036355C2
NL1036355C2 NL1036355A NL1036355A NL1036355C2 NL 1036355 C2 NL1036355 C2 NL 1036355C2 NL 1036355 A NL1036355 A NL 1036355A NL 1036355 A NL1036355 A NL 1036355A NL 1036355 C2 NL1036355 C2 NL 1036355C2
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Netherlands
Prior art keywords
fibres
fibers
fiber
pipe
cutting device
Prior art date
Application number
NL1036355A
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Dutch (nl)
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NL1036355A1 (en
Inventor
Willem Frans Van Der Mast
Original Assignee
Willem Frans Van Der Mast
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Publication date
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Priority to NL1036355A priority Critical patent/NL1036355C2/en
Publication of NL1036355A1 publication Critical patent/NL1036355A1/en
Application granted granted Critical
Publication of NL1036355C2 publication Critical patent/NL1036355C2/en

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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
    • 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
    • B29C53/805—Applying axial reinforcements
    • 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
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/32—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core on a rotating mould, former or core
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F16L9/127—Rigid pipes of plastics with or without reinforcement the walls consisting of a single layer
    • F16L9/128—Reinforced pipes
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Abstract

The method involves cutting and delivering reinforcement fibers (7) by a fiber cutting device (4) such that the fibers fall on a specific distance (11) to a surface of an object i.e. cylindrical pipe (1), where the cutting device is positioned above the object. The object is moved towards the cutting device, and is rotated around an axis (2). The distance between a location where the fibers are issued by the cutting device and the surface of the object is limited such that the fibers retain on specific orientation while falling down. An independent claim is also included for a system for supplying reinforcement fibers to an object.

Description

A method for supplying reinforcement fibres to an object
The invention is related to a method for providing a plastic object with reinforcement fibres, whereby a cutter device for 5 cutting and dispensing fibres is positioned above said object so that the fibres fall down over a certain distance to the surface of said object, and whereby the object is moving with respect to the cutter device. The expression 'distance' means the vertical distance (distance in vertical direction) between the location 10 where the fibres are dispensed and the location where the fibres reaches the surface of the object.
In general, fibres can be used to reinforce a plastic object, whereby the fibres are embedded in the plastic material, in order to form a plastic composite construction. The fibres can be glass 15 fibres or fibres of other material, such as basalt fibres, quartz fibres, silica fibres, or carbon fibres. The stiffness and strength of a composite (fibres and plastic) construction is mainly determined by the presence of the reinforcing fibres.
The fibres can be cut on a predetermined length by means of a 20 cutter device and subsequently be dropped on the surface of the object. An example of such cutter device is described in WO-A-2005/087993. This publication describes a cutter device comprising two rolls (rollers) that are pressing against each other. The two rolls rotate with equal circumferential speed. Around the 25 circumference of one or both rolls some sharp blades are installed. A long filament enters in the pinch of the rolls in tangential direction and is bended over the sharp blades so that it breaks in pieces. The length of the pieces (the fibres) that leave the cutter device is determined by the dimensions of the rolls and the number 30 of blades in the rolls.
Each embedded fibre causes a reinforcement of the composite material substantially in the longitudinal direction of the fibre.
In case reinforcement of the composite material in all directions is required, the fibres will be embedded in the plastic material 35 randomly, i.e. in all directions. However, it may be sufficient or required to reinforce the composite material in only one direction, or in a only some directions.
For example, when manufacturing a pipe of composite material, it is usual to reinforce the composite material by winding a long 1036355 2 filament (fibre) around the pipe during manufacturing. Such reinforcement is mainly effective in tangential direction of the pipe, being the longitudinal direction of the «round fibre. In case the composite material needs also strength in axial direction of 5 the pipe, it is usual to drop fibres, cut at a length of 25mm to 75mm on the surface of the pipe during manufacturing the pipe. Thereby, the fibres fall down randomly by gravity from the cutter device on to the surface of the pipe, «rhile the pipe is rotating. Such method results in an omni directional reinforcement, i.e. a 10 reinforcement in all directions. However, because strength in tangential direction of the pipe is already present, it would be preferred to have the supplied fibres oriented in only or mainly the axial direction of the pipe. (Orientation means that the longitudinal directions of the dosed fibres have a limited 15 variation, i.e. 90% of the fibres orientation deviate less than 10° from the desired direction).
The object of the invention is a method for providing a plastic object with reinforcement fibres, whereby the fibres are applied on the surface of the object in a predetermined 20 orientation.
In order to accomplish with that object, the distance between the location where the fibres are dispensed by the cutter device and the said surface of the object is limited in such manner that the fibres substantially maintain their orientation when they are 25 falling down. Thereby, the fibres will arrive at the surface of the object in a substantial predetermined orientation resulting in a relative large reinforcement in de main direction of the fibres.
It has been found that the longer the fibres are, the longer said distance can be. Preferably, said distance is less than two 30 times the length of the fibres dispensed by the cutter device, preferably less than the length of the fibres, more preferably less than half the length of the fibres.
In prior art methods for dropping reinforcement fibres on the surface of the object, the fibres are oriented randomly when they 35 arrive on the surface. Thereby, the length of the fibres is has to be limited, and are in general between 25mm and 75mm. When applying the method according to the invention, the length of the fibres are preferably longer. In a preferred embodiment, the length of the fibres dispensed by the cutter device is between 25mm and 300mm, 3 more preferably between 80mm and 200mm. Such fibres provide for an appropriate reinforcement, and experiences have shown that such fibres keep their orientation during falling down over a distance equal or shorter than twice their length.
5 In a preferred embodiment, the fibres are dispensed while moving in its longitudinal direction, characterized in that the angle between said longitudinal direction and said surface of the object is between -10° and +30° . Preferably, the fibres arrive on the surface of the object in such manner that the rear end of the 10 fibre touches the surface first, so that the fibre maintain its orientation while arriving on the surface. Therefore, in a preferred embodiment, the angle between said longitudinal direction and said surface of the object is larger than 0°, preferably larger than 5°, more preferably between 5° and 15°.
IS In a preferred embodiment, the object is a cylindrical pipe rotating around its axis and/or moving in its axial direction. Thereby, the pipe can be reinforced by means of continuous filaments by winding these filaments substantial tangential around the pipe surface. In order to reinforce the pipe in axial 20 direction, fibres (pieces of a filament) are dosed on the pipe surface in axial orientation. The movement of the pipe is required in order to distribute the fibres over the surface of the pipe, assuming the cutter device is in fixed position. A combination of moving the pipe and moving the cutter device is also possible.
25 ^ The invention is also related to a system for applying the method as described above, comprising a cutter device for cutting and dispensing fibres and means for locating the surface of the object underneath the cutter device, whereby the said means are designed in such way that the distance between the location where 30 the fibres are dispensed by the cutter device and said surface of the object to be fixed by said means is limited in such manner that the fibres substantially maintain their orientation when they are falling down.
The invention will now be further elucidated by means of a 35 description of an embodiment of a pipe producing machine, whereby a plastic pipe is provided with reinforcement fibres, whereby a cutter device for cutting and dispensing fibres is positioned above the pipe so that the fibres fall down to the outer surface of the 4 pipe, and whereby reference is made to a schematic drawing comprising three figures, whereby:
Fig. 1 is a side view of the machine;
Fig. 2 is a top view of the machine; and 5 Fig. 3 is an other side view of the machine.
The figures are diagrammatical representations, only showing parts that contribute to the elucidation of the method applied when operating the machine.
Figure 1 is a side view of the pipe producing machine, 10 showing the pipe 1 during its production. Figure 2 show the machine of figure 1 in top view, and figure 3 shows the machine from the right side in figure 1.
Pipe 1 is rotating around its axis 2 in the direction indicated by arrow 3, and is moving in its axial direction 15 indicated by arrow 10, in order to distribute cut fibres 7 on to the surface of the pipe. The pipe 1 is shaped around a mould, which mould is not shown in the drawing. Above the pipe is a cutter device comprising cutting rolls 4 driven by motor 5. A filament 6 is guided through a tube-like guiding member 8 to the pinch 12 of 20 the rolls 4, which rolls 4 cut filament 6 into fibres 7.
The distance 11, indicated with "A”, is the distance between the location where the fibres 7 are dispensed by the cutter device and the surface of the pipe 1 where the fibres 7 arrive on that surface. The fibres 7 are dispensed in their longitudinal 25 direction, as indicated by arrow 9. After dispensing, the fibres 7 fall on the surface of the pipe 1, whereby they substantially maintain their substantially axial direction with respect to the pipe 1. The dispensing direction 9 makes an angle o with the surface of the pipe 1, which angle a can be adjusted in order to 30 have the fibres 7 arriving on the surface of pipe 1 in an appropriate way. In order to prevent the fibres 7 from changing their orientation 9 too much on their flight from the cutter pinch 12 to the surface of pipe 1, the distance 11 is relative small.
In the figure the pieces of fibre 7 fall along the end edge 35 of the pipe 1; this location is dependant the axial position of the pipe 1 related to the cutter and can be any, in this drawing this position is accidentally.
In figure 2 is indicated that the dispensing direction 9 of the fibres 7 makes an angle β with respect to the axial direction 5 10 In order to compensate for the rotating speed of pipe 1. This angle β can be adjusted depending of said rotating speed, which speed is indicated by arrow 3, in order to control the orientation of the arrived fibres 7 on the surface of pipe 1.
5 The schematic drawing shows only an example. An other type of cutter device can be used, provided that the desired length of the fibres 7 and the dispensing direction 9 and the distance 11 between can be achieved.
In particular, the invention is related to: 10 λ method for providing a plastic object (1) with reinforcement fibres (7), whereby a cutter device (4,5) for cutting and dispensing fibres (7) is positioned above said object (1) so that the fibres (7) fall down over a certain distance (11) to the surface of said object (1) , and whereby the object (1) is moving IS with respect to the cutter device (4,5), characterized in that said distance (11) between the location where the fibres are dispensed by the cutter device (4,5) and the said surface of the object (1) is limited in such manner that the fibres (7) substantially maintain their orientation when they are falling down.
20 A method as claimed in claim 1, characterized in that said distance (11) is less than two times the length of the fibres (7) dispensed by the cutter device (4,5), preferably less than the length of the fibres (7) , more preferably less than half the length of the fibres (7).
25 A method as claimed in any one of the preceding claims, \ characterized in that the length of the fibres (7) dispensed by the cutter device (4,5) is between 25mm and 300mm, preferably between 80mm and 200mm.
A method as claimed in any one of the preceding claims, 30 whereby the fibres (7) are dispensed while moving in its longitudinal direction (9) , characterized in that the angle (a) between said longitudinal direction (9) and said surface of the object (1) is between -10° and +30°.
A method as claimed in claim 4, characterized in that the 35 angle (a) between said longitudinal direction (9) and said surface of the object (1) is larger than 0°, preferably larger than 5°, more preferably between 5° and 15°.
6 λ method as claimed in any one of the preceding claims/ characterized in that said object is a cylindrical pipe (1) rotating around its axis (2) and/or moving in its axial direction.
A system for applying the method as claimed in any one of the 5 preceding claims/ comprising a cutter device (4,5) for cutting and dispensing fibres (7) and means for locating the surface of the object (1) underneath the cutter device (4,5), characterized in that said means are designed in such way that the distance (11) between the location where the fibres are dispensed by the cutter 10 device (4,5) and said surface of the object (1) to be fixed by said means is limited in such manner that the fibres (7) substantially maintain their orientation when they are falling down.
1036355

Claims (7)

1. Werkwijze voor het voorzien van een kunststof object (1) met versterkingsvezels (7) , waarbij een vezel anij-apparaat (4,5) voor 5 het snijden en afgeven van vezels (7) is gepositioneerd boven genoemd object (1) , zodat the vezels (7) neervallen over een zekere afstand (11) naar het oppervlak van genoemd object (1) , en waarbij het óbject (1) wordt bewogen ten opzichte van het snij-apparaat (4,5) , met het kenmerk, dat genoemde afstand (11) tussen de plaats 10 waar de vezels (7) worden afgegeven door het snij-apparaat (4,5) en het genoemde oppervlak van het object (1) is beperkt op zodanige wijze dat de vezels (7) in hoofdzaak hun oriöntatie behouden wanneer ze neervallen.A method of providing a plastic object (1) with reinforcing fibers (7), wherein a fiber anise device (4, 5) for cutting and dispensing fibers (7) is positioned above said object (1), so that the fibers (7) fall over a certain distance (11) to the surface of said object (1), and wherein the object (1) is moved with respect to the cutting device (4,5), characterized in that that said distance (11) between the location 10 where the fibers (7) are dispensed by the cutting device (4,5) and said surface of the object (1) is limited in such a way that the fibers (7) in Mainly retain their orientation when they fall. 2. Werkwijze volgens conclusie 1, met het kenmerk, dat genoemde 15 afstand (11) minder is dan twee keer de lengte van de vezels (7) die door het snij -apparaat (4,5) worden afgegeven, bij voorkeur minder dan de lengte van de vezels (7) , meer bij voorkeur dan de halve lengte van de vezels (7).Method according to claim 1, characterized in that said distance (11) is less than twice the length of the fibers (7) delivered by the cutting device (4,5), preferably less than the length of the fibers (7), more preferably than half the length of the fibers (7). 3. Werkwijze volgens een der voorgaande conclusies, met het 20 kenmerk, dat de lengte van de door het snij-apparaat (4,5) af gegeven vezels (7) tussen 25mm en 300mm is, en bij voorkeur tussen 80mm en 200mm is.Method according to one of the preceding claims, characterized in that the length of the fibers (7) delivered by the cutting device (4,5) is between 25 mm and 300 mm, and preferably between 80 mm and 200 mm. 4. Werkwijze volgens een der voorgaande conclusies, waarbij de vezels (7) worden afgegeven terwijl zij in hun longitudinale 25 richting bewegen, met het kenmerk, dat de hoek (a) tussen genoemde \ longitudinale richting (9) en genoemd oppervlak van het object (1) tussen -10° en +30° ligt.4. Method as claimed in any of the foregoing claims, wherein the fibers (7) are released while moving in their longitudinal direction, characterized in that the angle (a) between said longitudinal direction (9) and said surface of the object (1) between -10 ° and + 30 °. 5. Werkwijze volgens conclusie 4, met het kenmerk, dat hoek (a) tussen genoemde longitudinale richting (9) en genoemd oppervlak van 30 het object (1) groter is dan 0°, bij voorkeur groter is dan 5°, meer bij voorkeur tussen 5° and 15° ligt.Method according to claim 4, characterized in that the angle (a) between said longitudinal direction (9) and said surface of the object (1) is greater than 0 °, preferably greater than 5 °, more preferably between 5 ° and 15 °. 6. Werkwijze volgens een der voorgaande conclusies, met het kenmerk, dat genoemd object een cilindrische pijp (1) is, die om zijn as (2) roteert en/of beweegt in zijn axiale richting.Method according to one of the preceding claims, characterized in that said object is a cylindrical pipe (1) that rotates and / or moves in its axial direction about its axis (2). 7. Systeem voor het toepassen van de werkwijze volgens een der voorgaande conclusies, omvattende een snij-apparaat (4,5) voor het snijden en afgeven van vezels (7) en middelen voor het plaatsen van het oppervlak van het object (1) onder het snij-apparaat (4,5) , met het kenmerk, dat genoemde middelen zodanig zijn ingericht dat de 1036355 afstand (11) tussen de plaats traar de vezels door het snij-apparaat (4,5) worden af gegeven en het oppervlak van het object (1) dat door genoemde middelen wordt vastgehouden zodanig beperkt is, dat de vezels (7) in hoofdzaak hun oriëntatie behouden wanneer ze 5 neervallen. 1036355System for applying the method according to one of the preceding claims, comprising a cutting device (4, 5) for cutting and dispensing fibers (7) and means for placing the surface of the object (1) under the cutting device (4,5), characterized in that said means are arranged such that the 1036355 distance (11) between the location where the fibers are delivered by the cutting device (4,5) and the surface of the object (1) held by said means is limited such that the fibers (7) substantially retain their orientation when they fall. 1036355
NL1036355A 2008-12-22 2008-12-22 Reinforcement fiber supplying method for pipe producing machine, involves limiting distance between location where fiber are issued and surface of object such that fiber retain on specific orientation while drop down NL1036355C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL1036355A NL1036355C2 (en) 2008-12-22 2008-12-22 Reinforcement fiber supplying method for pipe producing machine, involves limiting distance between location where fiber are issued and surface of object such that fiber retain on specific orientation while drop down

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1036355 2008-12-22
NL1036355A NL1036355C2 (en) 2008-12-22 2008-12-22 Reinforcement fiber supplying method for pipe producing machine, involves limiting distance between location where fiber are issued and surface of object such that fiber retain on specific orientation while drop down

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NL1036355A1 NL1036355A1 (en) 2009-02-23
NL1036355C2 true NL1036355C2 (en) 2009-10-27

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2018185A (en) * 1978-02-23 1979-10-17 Atlantic Bridge Co Forming fibre reinforced resins
JPH04122627A (en) * 1990-09-12 1992-04-23 Honda Motor Co Ltd Manufacture of sheet for fiber reinforced resin molding
WO2000015526A2 (en) * 1998-09-14 2000-03-23 Owens-Corning Composites S.P.R.L. Method for dispensing reinforcement fibers
US20080047657A1 (en) * 2006-08-25 2008-02-28 Jander Michael H System for forming reinforcement layers having cross-directionally oriented fibers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2018185A (en) * 1978-02-23 1979-10-17 Atlantic Bridge Co Forming fibre reinforced resins
JPH04122627A (en) * 1990-09-12 1992-04-23 Honda Motor Co Ltd Manufacture of sheet for fiber reinforced resin molding
WO2000015526A2 (en) * 1998-09-14 2000-03-23 Owens-Corning Composites S.P.R.L. Method for dispensing reinforcement fibers
US20080047657A1 (en) * 2006-08-25 2008-02-28 Jander Michael H System for forming reinforcement layers having cross-directionally oriented fibers

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