[go: up one dir, main page]

WO2004000536A1 - Moulage par transfert de resine assiste par canaux - Google Patents

Moulage par transfert de resine assiste par canaux Download PDF

Info

Publication number
WO2004000536A1
WO2004000536A1 PCT/US2002/019942 US0219942W WO2004000536A1 WO 2004000536 A1 WO2004000536 A1 WO 2004000536A1 US 0219942 W US0219942 W US 0219942W WO 2004000536 A1 WO2004000536 A1 WO 2004000536A1
Authority
WO
WIPO (PCT)
Prior art keywords
preform
resin
tube
pressure
movable portion
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/US2002/019942
Other languages
English (en)
Inventor
Eric J. Lang
Richard W. Rydin
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 AU2002312578A priority Critical patent/AU2002312578A1/en
Priority to PCT/US2002/019942 priority patent/WO2004000536A1/fr
Publication of WO2004000536A1 publication Critical patent/WO2004000536A1/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
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/546—Measures for feeding or distributing the matrix material in the reinforcing structure
    • B29C70/548—Measures for feeding or distributing the matrix material in the reinforcing structure using distribution constructions, e.g. channels incorporated in or associated with the mould
    • 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
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
    • B29C70/443—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding and impregnating by vacuum or injection
    • 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
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/544—Details of vacuum bags, e.g. materials or shape

Definitions

  • wet lay-up processes tend to have lower average quality than resin infused parts. They are labor intensive to manufacture because each layer of preform material must be individually coated with resin and carefully positioned by hand. One frequent problem with wet lay-up methods is air bubble entrapment inside the composite while the resin is being applied to the preform. A second difficulty is achieving a uniform part thickness and fiber volume fraction which ultimately influence the material properties. Another problem with wet lay-up processes is the excessive amount of fumes given off by the exposed resin before and during cure.
  • Resin infusion methods are carried out in a closed system which eliminates most ofthe fumes. Resin infusion processes can also infuse resin into a preform with a vacuum thus avoiding air bubble entrapment. Resin infusion methods allow for better control over part dimensions and fiber volume fraction.
  • resin infusion methods overcome many ofthe limitations of wet lay-up processes. Unfortunately, until recently resin infusion processes tended be more expensive than wet lay-up because ofthe more expensive molding apparatus required. In the past, a rigid closed mold was required. Even though closed mold methods are improvements over wet lay-up methods, there are problems with closed mold methods beyond that of cost. When infiltrating high volume fraction preforms, standard closed mold methods require high resin injection pressures and long infiltration times because the low permeability of high volume fraction preforms.
  • a preform is placed on a tool surface and covered with a permeable sheet.
  • a distribution medium is placed on top ofthe permeable sheet and is covered with a continuous non-permeable sheet sealed at its periphery.
  • a vacuum is drawn on the entire assembly of preform, permeable sheet, and distribution medium.
  • Resin is introduced to the distribution medium which provides high permeability pathways for the resin to distribute itself over the entire top surface ofthe preform.
  • the injection pressure which must be less than atmospheric pressure, forces most ofthe resin through the permeable membrane and into the preform. Satisfactory resin impregnation is usually achieved since there is a relatively small resistance to infiltration ofthe preform in the thickness direction in comparison with the in-plane direction. The lower resistance to infiltration also results in shorter infusion times.
  • the molding methods and apparatus ofthe present invention have many different uses, and the apparatus can take on different forms.
  • An example is provided of infiltrating an advanced composite preform, which is an assemblage of reinforcing fibers, with a liquid plastic resin.
  • the infiltrating fluid could be one of many different fluids, such as gases, liquids, and liquids containing suspended solid particles, which in the description are collectively referred to hereafter as "resin.”
  • the preform can be can be made from a variety of reinforcing fibers including fiberglass, Kevlar (aramid) fibers, and carbon fibers. There are many types and configurations of fibers and yams made from fibers. The yams may be formed into many different types of assemblages including weaves, braids, and knits as well as short and long fiber mats. Different types of fibers may be combined in an assemblage to form a hybrid preform. All these and other variations are known by those skilled in the art.
  • the preform may also include inserts of various types such as foam cores, honeycomb cores, balsa wood, metal inserts and reinforcements. Additionally, the preform may contain sensors or other devices. All of these components are known in the prior art.
  • the resin is any of a variety of curable liquid resins such as polyester, vinyl ester, and epoxy.
  • the resins may be catalyzed for high temperature cure or room temperature cure and for various cures times as is compatible with the needs ofthe molding process.
  • the resin should be properly catalyzed and degassed prior to injection into the preform cavity.
  • the wide variety of useful resins and the methods of preparing the resin are all widely known in the art.
  • a vacuum be drawn on the cavity containing the preform prior to beginning the flow of resin. In this way, the problem of entrapping an air bubble in the resin is avoided.
  • a source of vacuum may continue to be applied to the preform cavity during the infiltration of resin and until the resin has cured or it may be removed at some point during the infiltration. Even if the source of vacuum is removed (by closing a valve for example), the space inside the preform cavity should remain substantially a vacuum during resin infiltration if the preform cavity is properly sealed.
  • it is possible to infiltrate the preform with resin without initially drawing a vacuum on the preform cavity however these embodiments introduce the possibility of trapping an air bubble in the preform.
  • the number and position ofthe sources of vacuum and resin depend on the specific application. Each resin and vacuum source is able to be controlled individually using a valve or other means of stopping the flow of material. The flow of resin should be stopped when sufficient resin has entered the mold. This may be controlled by properly adjusting the resin gel time and/or measuring the amount of resin that has entered the mold and stopping the flow of resin when a pre-metered amount of resin has entered the mold, or using a sensor to control the flow of resin into the mold.
  • the present invention relates to a method of molding a composite by flowing a resin into a permeable preform contained in a molding apparatus comprising: providing a mold surface with movable portions that form resin flow channels in the mold surface when positioned away from a surface ofthe preform; allowing the resin to flow along the resin flow channels and from the resin flow channels into the preform; moving the movable portions ofthe mold surface toward the surface ofthe preform; then curing the resin in the preform thereby forming the composite.
  • the present invention encompasses a method for molding a composite by infusing a resin into a preform contained in a mold, comprising:
  • the invention encompasses a method of molding a composite by flowing a resin into a preform comprising:
  • j providing a source of said resin in communication with said preform side of said first flexible impermeable membrane; k. applying a resin pressure on said preform side of said first flexible impermeable membrane that is higher than said spacer system pressure on said spacer system side of said first flexible impermeable membrane thereby creating a differential pressure that deforms said first flexible impermeable membrane into a network of gaps in said spacer system, said first flexible impermeable membrane forming temporary resin flow pathways on said preform while deformed into said network of gaps;
  • the invention encompasses a method (CARTM resin tube method) for molding a composite by infusing a resin into a preform contained in a mold, comprising:
  • said mold surface surrounding at least a portion of said hollow tube and structurally adapted to hold said tube base substantially adjacent to said preform; iii. said tube base having a movable portion, comprising a compliant material;
  • said movable portion being structurally adapted to move in response to a differential pressure between a tube pressure on said tube inside and a base pressure on said tube base;
  • said movable portion being in an open position when said movable portion is positioned away from said preform
  • the invention also encompasses a method (CARTM vacuum tube method) for molding a composite by infusing a resin into a preform comprising:
  • said mold surface having a movable portion
  • the present invention also relates to the apparatuses used to carry out these processes, specifically, an apparatus for molding a composite by infusing a resin into a preform contained in a mold, comprising: a. a mold surface;
  • At least one hollow tube comprising a tube inside and a tube outside;
  • said mold surface surrounding at least a portion of said hollow tube and structurally adapted to hold said tube base substantially adjacent to said preform;
  • said tube base having a movable portion, comprising a compliant material
  • said movable portion structurally adapted to move in response to a differential pressure between a tube pressure on said tube inside and a base pressure on said tube base;
  • said movable portion being in an open position when said movable portion is positioned away from said preform; vi. said movable portion being in a closed position when said movable portion is positioned substantially adjacent said preform;
  • the present invention also relates to a vacuum-based apparatus for molding a composite by infusing a resin into a preform contained in a mold, comprising: a. a mold surface;
  • At least one hollow tube comprising a tube inside and a tube outside;
  • said mold surface surrounding at least a portion of said hollow tube and structurally adapted to hold said tube base substantially against said preform
  • said tube base having a movable portion comprising a compliant material; iv. said movable portion structurally adapted to move in response to a differential pressure between a tube pressure on said tube inside and a base pressure on said tube base;
  • said movable portion being in an open position when said movable portion is positioned away from said preform
  • said vacuum channel provides a distributed source of vacuurfPHuring said infusing and said movable portion is in said closed position when said resin cures.
  • the present invention encompasses the tube device used in the above apparatuses and method, comprising:
  • a. a hollow tube comprising a tube inside and a tube outside;
  • said tube outside having a tube base; c. said tube base having a movable portion comprising a compliant material;
  • said movable portion structurally adapted to move in response to a differential pressure between a tube pressure on said tube inside and a base pressure on said tube base;
  • said hollow tube having a predetermined cross-section and pliability such that said tube base is substantially flat when said tube inside pressure minus said tube base pressure is a predetermined closure pressure, and such that said tube base forms a resin flow pathway when said tube inside pressure minus said tube base pressure is a predetermined opening pressure.
  • Figure 2 is a section through 2-2 of Figure 1.
  • Figure 3 shows mechanically moved membranes.
  • Figure 4 and 5 show membranes and a rigid sheet.
  • Figures 6 and 7 show a membrane and a rigid mold.
  • Figures 8-10 show details of a spacer and membranes.
  • FIGS 11 and 12 show details of an alternate spacer.
  • Figures 13-15 show details of a bubble mat used with a membrane.
  • Figures 16-18 show details of an inflatable bubble membrane and mold.
  • Figures 19 and 20 show details of forming channels in a flexible mold.
  • Figure 21 shows CARTM tubes embedded in a rigid tool.
  • Figure 22 shows CARTM tubes on a preform and covered by a flexible membrane.
  • Figure 23 shows CARTM tubes in extrusions that prevent the flexible membrane from collapsing the tubes.
  • FIG. 24 shows the use of CARTM resin feed tubes and CARTM vacuum tubes.
  • Figure 25 shows a cross-section of a CARTM tube and either resin feed or vacuum manifold.
  • Figures 26 and 27 show an impermeable spacer system configured as a bladder over a portion of a preform.
  • Figures 28 and 29 show a spacer system configured as a bladder over a portion of a preform.
  • the prior art contains various means of aiding the distribution of resin over the surface of a preform for the infiltration of a preform with resin.
  • none of these methods provides a means of creating temporary resin distribution pathways on the surface ofthe preform.
  • the advantage of temporary resin distribution channels over the use of a distribution medium is a major reduction in the amount of waste material produced. When producing composites in large quantities, this large amount of waste is costly and a source of pollution and therefore should be eliminated.
  • the essence ofthe invention is a method and the related apparatus for molding a composite by infusing resin into a permeable preform, comprising the creation of temporary resin channels on the surface ofthe preform, flowing resin along the channels and from the channels into the preform, stopping the flow of resin, removing the temporary channels if desired, curing the resin in the preform and forming a composite.
  • the methods disclosed in this patent are able to produce a composite if the temporary resin distribution channels are not removed before curing the resin. In this case, cured resin channels remain on the surface ofthe preform. This is not desirable in most applications and therefore, in the preferred embodiments ofthe invention, the resin flow channels are removed prior to curing the resin so that there are no cured resin flow channels on the surface ofthe composite.
  • One method comprises activating movable portions ofthe mold surface to create a network of resin distribution channels on the surface ofthe preform and deactivating them to remove the channels.
  • These movable portions ofthe mold surface can be constructed in various ways. In a rigid mold, sections ofthe mold can be made so they are retractable. These portions can be retracted to create the resin flow channels and extended to remove the channels after sufficient resin has entered the preform cavity. The retractable sections ofthe rigid mold should be constmcted in such a way that they do not leak resin.
  • Another method of creating temporary resin distribution channels is to have mechanically movable portions ofthe mold surface which are made of a stiff elastomeric material.
  • a means of deforming the stiff elastomeric material into resin distribution channels is provided in the body ofthe mold.
  • This embodiment ofthe invention provides a simple, cost-effective means of creating temporary resin distribution channels in the surface ofthe mold. After resin has infiltrated the preform, the stiff elastomeric portions ofthe mold are pushed into a position flush with the surface ofthe preform. At this point, curing ofthe resin may begin.
  • a thin flexible membrane can be placed over the preform and portions ofthe membrane can be caused to deform into resin distribution channels by various means.
  • These embodiments have advantages over the previous embodiments in terms ofthe cost and ease of making and preparing the mold.
  • One ofthe means of deforming the flexible impermeable membrane involves applying mechanically or electro-mechanically induced forces at distributed points along the surface ofthe flexible membrane. These forces cause the membrane to move away from the surface ofthe preform temporarily to allow the resin to flow over the surface ofthe preform.
  • One method of applying a differential pressure between the two sides ofthe flexible membrane is to cover the flexible membrane with a mold backing that contains a network of channels in its surface. Resin is then introduced to the preform side ofthe flexible membrane at a pressure higher than the pressure on the other side ofthe membrane. This causes the membrane to be forced out and away from the preform and the membrane then takes on the shape ofthe internal surface ofthe containing mold backing. Since this containing mold has a network of channels in its surface, the flexible membrane now has created a network of resin distribution channels on the surface ofthe preform.
  • the mold is made from a rigid sheet material with channels impressed upon its surface.
  • the rigid sheet material may be sheet metal or other suitable rigid sheet materials which can be formed into the proper shape.
  • the ambient atmospheric pressure presses down upon the rigid sheet which in turn presses down on the flexible membrane in regions where there is not a channel.
  • the mold is made from thick rigid material with a network of channels formed in its surface.
  • the rigid material may be a stiff material such as steel.
  • This embodiment provides greater dimensional accuracy for the composite.
  • the compacting pressure is not limited to atmospheric pressure. Higher resin injection pressures are possible since the thick and rigid material can support the flexible membrane. Thick and rigid molds are more expensive and difficult to make than rigid sheets with channels. This is especially true for very large parts. Thus, both embodiments are useful and the specific application will determine which embodiment is most appropriate.
  • Each ofthe previous two embodiments ofthe invention require that the pressure on the preform side ofthe flexible membrane exceed the pressure on the other side ofthe membrane.
  • the preferred method of creating this situation is to apply a source of vacuum to the channels in the internal surface ofthe mold. It is possible to include a layer of porous material known in the art as breather material between the mold surface and the flexible membrane to aid in quickly and evenly evacuating the channels.
  • a spacer system is a system of sturdy shapes inter-connected in such a way that they provide a network of gaps into which the flexible membrane can deform to create temporary resin distribution channels when the pressure on the preform side ofthe flexible membrane exceeds the pressure on the other side ofthe membrane where the spacer systems is located.
  • a link mat is a geometric array of spacer blocks connected to each other with link rods.
  • the blocks and link rods can be made of plastic or other suitably sturdy material.
  • the link mat is placed on top ofthe flexible impermeable membrane which is in contact with the preform and then covered with an additional flexible impermeable membrane which is able to be sealed against the first membrane.
  • the purpose ofthe second membrane is to allow a reduced pressure to be applied to the cavity containing the spacer system.
  • spacer system is similar to a woven mat which is also covered with an impermeable outer cover.
  • the mat consists of large flexible rods in the weft direction held together with thin yams in the warp direction. This arrangement produces a series of channels between the larger rods.
  • the flexible membrane deforms into these channels during resin infusion and the resin distribution channels formed under the membrane and on the surface ofthe preform aid in flowing resin over the surface ofthe preform.
  • higher pressure fluid such as air is introduced to the cavity containing the fabric mat
  • the impermeable membrane between the preform and the fabric mat is pushed smoothly and evenly against the preform.
  • a bubble mat is a flexible sheet with an array of bubbles on its surface.
  • An inflatable bubble mat has a series of small inter-connections which allow the bubbles to be inflated or deflated. In both cases, the gaps between the bubbles provide a network of channels for the flexible membrane in contact with the preform to deform into when the pressure on the preform side ofthe flexible membrane is higher than the pressure on the bubble mat side.
  • the spacer systems discussed above may also contain a layer of breather material to aid in quickly and evenly adjusting the pressure in the spacer system cavity.
  • the flexible membrane and the spacer system is combined into one unit.
  • An inflatable bubble mat is placed on a preform which is resting on a tool surface.
  • the bubble mat is sealed at its periphery on the tool surface so that a vacuum can be drawn on the preform cavity.
  • the bubbles in the bubble mat are then inflated which causes the bubble mat to lift away from the preform and thereby create a system of resin distribution channels on the surface ofthe preform.
  • Resin is injected under the bubble mat and flows through the channels and from the channels into the preform.
  • the source of resin is stopped and the bubbles are deflated allowing the bubble mat to press down smoothly and evenly over the surface of the preform.
  • the flexible impermeable membrane that deforms to form the temporary resin flow pathways does not have to cover the entire preform. Instead, the flexible impermeable membrane can cover only a portion ofthe preform.
  • the spacer system is impermeable and is sealed to the flexible membrane.
  • a second flexible impermeable membrane covers the impermeable spacer system and the preform, and this second flexible impermeable membrane is sealed at its periphery to the tool surface.
  • the combined impermeable spacer system and flexible impermeable membrane form a bladder that can be collapsed using a pressure differential to form temporary resin flow pathways or inflated to remove the temporary resin flow pathways.
  • the spacer system is sandwiched between two flexible impermeable membranes that are sealed to each other at their periphery thereby forming a bladder.
  • a third flexible impermeable membrane covers the bladder and the preform, and this third flexible impermeable membrane is sealed at its periphery to the tool surface.
  • Multiple bladders may be used over different portions ofthe preform.
  • the temporary resin distribution channels have been created by either mechanically moving sections ofthe mold surface or deforming a flexible impermeable membrane by some means.
  • the temporary channels on the surface of the preform comprise a flexible mold material containing interior the surface.
  • a resin pressure on the preform side ofthe flexible mold greater than the pressure in the channels below the surface ofthe flexible mold causes the flexible mold material between the channels and the preform to deform into the interior channels and thereby create resin distribution channels on the surface ofthe preform. It is preferable in this embodiment ofthe invention that a vacuum be drawn on the cavity containing the preform and that a vacuum also be drawn on the channels below the surface ofthe flexible mold material during resin infusion.
  • the source of resin and vacuum are stopped and a pressure higher than the pressure ofthe resin in the preform cavity is applied to the channels. This causes the material between the preform and the channels to move toward the preform and become flush with the surface of he preform. Curing the resin after the channels have been removed provides a composite with a smooth surface.
  • the flexible mold material containing interior channels can take on a number of distinct geometric configurations.
  • a mold surface that has a movable portion.
  • the movable portion is in an open position when the movable portion is positioned away from the preform.
  • the movable portion is in a closed position when the movable portion is positioned substantially adjacent the preform.
  • the movable portion and the preform form a resin flow pathway when the movable portion is in the open position.
  • a source of resin is provided in communication with the resin flow pathway.
  • the method proceeds by forming a resin flow pathway by moving the movable portion to an open position. Then, resin from the source of resin flows along the resin flow pathway and from the resin flow pathway into the preform. When the preform has been infused with resin, the movable portion ofthe mold surface is moved to the closed position. Finally, the resin cures in the preform and thereby forms the composite.
  • the flexible mold material is in the form of a hollow tube, and the movable portion ofthe mold surface is a portion ofthe hollow tube.
  • the movable portion ofthe mold surface is a movable compliant material. Suitable materials are compatible with the resin, and the temperatures experienced during molding. One material suitable for most commonly used resins is clear PVC.
  • the hollow tube has a tube inside and a tube outside.
  • the tube outside has a tube base that faces the preform.
  • the movable portion ofthe hollow tube is a portion ofthe tube base. The movable portion is such that a differential pressure between a tube pressure on the tube inside and a preform pressure on the tube base can move the movable portion between the open position and the closed position and between the closed position and the open position depending on the differential pressure.
  • differential pressure there are several arrangements for creating the differential pressure.
  • resin injected at pressure creates a differential pressure between the tube inside and the preform that forces the movable portion away from the surface ofthe preform into the open position.
  • the resin injection pressure is decreased, thereby decreasing the differential pressure and allowing the movable portion to return to the closed position.
  • the differential pressure can be controlled by controlling the resin pressure only. This is one form of a differential pressure-adjustment means.
  • a tube pressure-adjustment means can consist of a source of pressurized fluid (such as air, water, oil, etc.) connected to the tube inside via a valve or pressure regulator.
  • a source of pressurized fluid such as air, water, oil, etc.
  • One simple way to create a tube pressure-adjustment means for adjusting the tube pressure is to use atmospheric pressure or compressed air, and a source of vacuum. To increase the differential pressure, a vacuum is drawn on the tube inside. To decrease and, if necessary, reverse the differential pressure, the tube inside is exposed to atmospheric pressure or compressed air. This is a simple, low-cost, and fast way to move the movable portion between the open position and the closed position.
  • a vacuum can be drawn on the preform during the flowing ofthe resin.
  • resin at atmospheric pressure can be infused into the preform.
  • the hollow tube needs to resist collapsing against the preform so that the movable portion can be in the open position during resin infusion.
  • Some hollow tube designs are self-supporting and do not collapse against the preform even when there is a vacuum in the mold.
  • These flexible tubes can be can be placed over curved preforms and complex geometries allowing the method to be useful in a wide variety of applications.
  • Other tubes such as thin walled tubes, might have a tendency to collapse against the preform when a vacuum is drawn on the mold.
  • the hollow tube can be placed in a channel in an extmsion that shields the hollow tube from forces that might collapse the tube against the preform.
  • the extmsion has a constant cross-section and can be made from either a rigid or flexible material. In either case, the extmsion can support the forces that might otherwise tend to collapse the hollow tube against the preform.
  • a rigid backing with channels may cover the hollow tubes and the preform.
  • the rigid backing can help to define the shape ofthe composite. If the preform is placed on a rigid tool surface and then a rigid backing with channels (and hollow tubes in the channels) is placed on the preform, a two-sided mold is created. Alternatively, the preform can rest on a tool surface, and an impermeable membrane can cover the hollow tubes and the preform and serve as part ofthe molding apparatus that contains the preform. If the tube in a channel in an extmsion method is used, an impermeable membrane can cover the hollow tube, the extmsion, and the preform and serve as part ofthe molding apparatus that contains the preform.
  • the process works as follows. First, the preform is infused with resin while the vacuum channel is in the open position. Resin flows from the preform into the vacuum channel, and then the resin flows along the vacuum channel toward the source of vacuum. When the preform has been infused with resin, the movable portion is moved to the closed position. Finally, the resin is cured in the preform, thereby forming the composite.
  • a plurality of resin flow pathways may be used to more easily and quickly infuse the preform.
  • a plurality of vacuum channels may be used to provide a more distributed vacuum.
  • the resin flow pathways and the vacuum channels can be used in combination to infuse the preform and to provide a distributed vacuum source.
  • the resin flow pathways and the vacuum channels are positioned in an alternating sequence parallel to each other.
  • Figure 1 shows generally a mold 1 with upper 3 and lower 5 halves enclosing a preform 7.
  • the mold upper and lower halves meet at surfaces 11 and 9.
  • Mechanically movable portions ofthe mold 14 are shown aligned with the internal mold surface 15.
  • the mechanically movable portion ofthe mold 13 is retracted to create a network of resin flow channels 17.
  • Figure 2 shows a cross-sectional view ofthe upper mold half 3 with the preform removed.
  • the network of vertical 17 and horizontal 19 resin flow channels allows resin to easily spread out over the surface ofthe preform and then into the preform. Obviously, there are many different possible configurations ofthe resin flow channels.
  • Figure 3 shows a modified mold with upper 21 and lower 23 halves enclosing a preform 25.
  • the mold upper and lower halves meet at parting line surfaces 29 and 27.
  • Mechanically movable portions ofthe mold 31 are attached to flexible portions of the mold surface 33 in a position aligned with the internal mold surface.
  • the mechanically movable portions 36 are retracted thereby creating a network of resin distribution charmels 35 in the surface ofthe mold.
  • Figure 4 shows a tool 53 with a surface 55 on which is placed a preform 65.
  • the preform is covered with a flexible membrane 57 which is sealed at its periphery using a seal 71.
  • a rigid sheet of material 63 with a network of resin distribution channels 67 is placed over the flexible membrane 57 and sealed at its periphery with a seal 69.
  • An additional flexible impermeable membrane 61 is placed over the rigid sheet 63 and sealed at its periphery with a seal 59.
  • Figure 5 shows the apparatus of Figure 4 with the flexible membrane 57 deformed into the channels in the rigid sheet 63 thereby creating a resin distribution channel 73 on the surface ofthe preform 65.
  • the outer impermeable membrane 61 helps to maintain the seal on the cavity containing the rigid sheet.
  • Figure 6 shows a tool 101 and tool surface 103 onto which a preform 107 has been placed.
  • the preform is covered with a flexible membrane 105 over which is placed a rigid mold 113 which has a network of channels 111 in its surface.
  • Figure 7 shows a similar arrangement.
  • a preform 107 is placed on a tool surface 103 of a tool 101.
  • a flexible membrane 105 is placed over the preform 107 and a rigid mold half 113 is placed over the flexible membrane 105.
  • the flexible membrane 105 deforms into channels 111 in upper mold half 113 thereby creating resin flow channels 109.
  • the process of deforming the flexible membranes into the channels in the surface of rigid sheets or rigid molds involves applying a source of resin to the preform side ofthe membrane and reducing the pressure on the other side ofthe flexible membrane.
  • a vacuum is created in the channels in the mold.
  • Figure 8 is the first in a series of figures depicting apparatus for creating temporary resin flow channels on the surface of a preform using a flexible membrane, a spacer system, and a differential pressure between the preform side ofthe membrane and the spacer system side ofthe flexible membrane.
  • Figure 8 shows a tool 183 and tool surface 187 upon which is placed a preform 193 which in turn is covered with an impermeable flexible membrane 185 sealed at its periphery with a seal 201.
  • On top of the flexible membrane is a spacer system 197 and over the spacer system is another impermeable flexible membrane 189 which is also sealed at its periphery with a seal 199.
  • the spacer system is any device capable of separating the two membranes so that a differential pressure between the preform and the cavity containing the spacer system causes the flexible membrane 185 to deform into a network of temporary resin distribution channels on the surface ofthe preform.
  • a differential pressure between the preform and the cavity containing the spacer system causes the flexible membrane 185 to deform into a network of temporary resin distribution channels on the surface ofthe preform.
  • Figure 10 shows an individual spacer 191 and an inter-connecting link 195 between two spacers. Additionally, the flexible membranes are deformed to create resin distribution channels 203.
  • Figure 9 shows a top view ofthe spacer system 197. When properly designed, a spacer system is able to conform easily to the surface of a preform.
  • Figure 12 shows in detail a spacer system made from a special fabric. Flexible rods 209 inserted in the weft direction are held together with smaller yarns 207 in the warp direction. The flexible membrane is deformed to create temporary resin distribution channels 205.
  • Figure 11 shows a top view ofthe fabric spacer system 211 with rods 209 and connecting yams 207.
  • FIG 13 shows the apparatus of Figure 8 except the spacer system 197 and outer flexible membrane 189 are replaced with a bubble mat 213.
  • the bubble mat is similar to that used as padding when shipping delicate items.
  • the details ofthe bubble mat are shown in Figures 14 and 15.
  • the bubble mat 213 is shown in a top view.
  • An array of bubbles 215 is held together by connecting material 217.
  • the flexible membrane 185 is deformed into the space between the bubbles to create temporary resin distribution charmels.
  • Figures 16 and 17 show a molding apparatus in which the flexible membrane 185 and the bubble mat spacer system 213 of Figure 13 have been combined into one item 229.
  • a preform 233 is placed on a tool surface 227 of a tool 225, and covered with an inflatable bubble mat 229.
  • the bubble mat is sealed at its periphery with a seal 237.
  • the bubbles 235 and the connecting material form resin distribution channels 231 when the bubbles are inflated.
  • Figure 17 shows the apparatus of Figure 16 when the bubbles are deflated 239 and the distribution channels 231 are removed.
  • the inflatable bubble mat 229 presses smoothly and evenly upon the preform 233.
  • Figures 18A, 18B, and 18C detail some of the features ofthe inflatable bubble mat.
  • FIG 18 A the inflatable bubble mat 229 is shown in a top view.
  • the bubbles 235 are inter-connected via thin passages 241.
  • the system of bubbles and inter-connections allows all the bubbles to be inflated or deflated from one source of compressed gas or vacuum as the case may be.
  • Figures 18B and 18C clearly show the cross-sectional shape ofthe bubble mat in the inflated and deflated configurations. In these figures it is easy to see how the temporary resin distribution channels 231 on the surface ofthe preform are created and removed by inflating and deflating the bubbles.
  • Figure 19 shows a mold which inco ⁇ orates a flexible mold material such a silicone rubber.
  • the surface ofthe mold is in the shape ofthe final part whfcn the mold is in the relaxed configuration.
  • a network of resin distribution channels can be made to appear on the surface ofthe preform by reducing the pressure in a system of channels in the body of the flexible mold material.
  • channels 267 which form a network of passages just beneath the internal surface of the mold.
  • Figure 19 shows a preform 263 placed on the tool surface 265 and the upper half of the mold 259 made of flexible mold material containing a network of channels 267 beneath the internal surface ofthe mold.
  • Figure 20 shows the apparatus of Figure 19 with the upper mold half 259 deformed to form resin distribution channels 271 on the internal surface ofthe upper mold half 259.
  • FIGS 21 through 23 illustrate three embodiments of inventive hollow tubes, and the methods of their use are collectively referred to as Channel Assisted Resin Transfer Molding or CARTM, and thus, the inventive hollow tubes are referred to as CARTM tubes.
  • CARTM tubes Each embodiment is shown with one resin flow pathway in the open position and one resin flow pathway in the closed position.
  • hollow tubes 307 and 309 are in channels in a tool 305.
  • a preform 303 is placed on the tool 305 and over the hollow tubes.
  • Each hollow tube has a tube base that faces the preform.
  • a flexible impermeable membrane 301 is placed over the hollow tubes and preform, and sealed with a seal 311 to the tool 305 at its periphery.
  • the movable portion 313 ofthe tube base of hollow tube 307 is positioned away from the surface ofthe preform to show a resin flow pathway 315 in the open position, while the movable portion 317 ofthe tube base of hollow tube 309 is positioned against the surface ofthe preform to show a resin flow pathway in the closed position.
  • hollow tube 307 For hollow tube 307, a differential pressure between the tube pressure on the tube inside 319 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 313 ofthe tube base to the open position.
  • a different differential pressure between the tube pressure on the tube inside 321 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 317 ofthe tube base to the closed position.
  • hollow tubes 323 and 325 are on the upper surface of a preform 327 that is on a surface of a tool 329.
  • a flexible impermeable membrane 331 is placed over the hollow tubes and preform, and sealed with a seal 333 to the tool 329 at its periphery.
  • Each hollow tube has a tube base that faces the preform.
  • the movable portion 335 ofthe tube base of hollow tube 323 is positioned away from the surface ofthe preform to show a resin flow pathway 337 in the open position, while the movable portion 339 ofthe tube base of hollow tube 325 is positioned against the surface ofthe preform to show a resin flow pathway in the closed position.
  • a differential pressure between the tube pressure on the tube inside 341 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 335 ofthe tube base to the open position.
  • a different differential pressure between the tube pressure on the tube inside 343 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 339 ofthe tube base to the closed position.
  • hollow tubes 345 and 347 are in channels in extmsions 349 and
  • each hollow tube has a tube base that faces the preform.
  • the movable portion 365 ofthe tube base of hollow tube 345 is positioned away from the surface ofthe preform to show a resin flow pathway 367 in the open position, while the movable portion 369 ofthe tube base of hollow tube 347 is positioned against the surface ofthe preform to show a resin flow pathway in the closed position.
  • a differential pressure between the tube pressure on the tube inside 371 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 365 ofthe tube base to the open position.
  • a different differential pressure between the tube pressure on the tube inside 372 and a preform pressure on the movable portion ofthe tube base has moved the movable portion 369 ofthe tube base to the closed position.
  • the extmsions 349 and 351 prevent the impermeable membrane from collapsing the hollow tubes 345 and 347 against the preform 357 when a vacuum is drawn on the preform.
  • the impermeable membranes 301, 331, and 361 can be replaced with a rigid tool surface. This arrangement gives greater dimensional accuracy to the molded part.
  • Figure 24 shows a tool 373 on which is placed a preform 375.
  • the preform is covered with a network of CARTM tubes 377 that intersect a resin feed manifold 379 that mns along an edge of the preform to a resin source tube 397.
  • These CARTM tubes are called resin feed tubes since their resin flow pathways supply the resin to the preform.
  • a second network of CARTM tubes 381 intersects a vacuum manifold 383 that runs along the opposite edge ofthe preform to a vacuum source tube 395.
  • These CARTM tubes are called vacuum tubes since their vacuum channels distribute vacuum over the surface ofthe preform.
  • the CARTM tube networks 377 and 381 can be created by joining sections of
  • Each CARTM tube network can be connected to a separate means of adjusting the pressure inside the tubes, thereby allowing the networks to be activated independently of each other.
  • the pressure inside the resin feed CARTM tube network 377 is adjustable through tube 399, while the pressure inside the vacuum channel CARTM tube network 381 is adjustable through tube 401.
  • each CARTM tube can be controlled individually. This control flexibility allows the progress of the infusion to be controlled quite precisely.
  • An impermeable membrane 391 is placed over the preform 375, resin manifold 379, vacuum manifold 383 and both CARTM tube networks, and sealed around the periphery with a seal 393, thereby allowing a vacuum to be pulled on the preform 375 through the vacuum port 395.
  • resin at nearly atmospheric pressure enters the resin feed manifold from the resin source tube 397, and pushes the movable portion ofthe resin feed CARTM tubes to the open position, thereby forming resin flow pathways on the bottom of the resin feed CARTM tubes. The resin flows along the resin flow pathways and into the preform.
  • the differential pressure of the resin on the outside of the tubes and the vacuum on the inside of the tubes moves the movable portion of the CARTM tubes to the open position.
  • the pressure inside both CARTM tube networks is increased until the movable portion ofthe CARTM tubes is in the closed position.
  • Figure 25 shows a manifold and related CARTM apparatus in cross-sectional view.
  • the preform 407 sits on a tool 405.
  • the manifold 413 is placed on the preform
  • the manifold 413 has a large channel 415 and a gap 417.
  • a CARTM tube 409 mns over the preform 407 and the manifold 413 to a connection with a tube 419 that connects to a means of adjusting the pressure inside the CARTM tube 409.
  • An impermeable membrane 411 is placed over the preform 407, manifold 413, and CARTM tube 409, and sealed around the periphery with a seal 421.
  • manifold 413 is a resin feed manifold and the CARTM tube 409 is a resin feed tube
  • the resin from the resin source tube flows along the channel 415 and then through the gap 417 into the resin flow pathway 423 in the bottom of the CARTM tube 409.
  • manifold 413 is a vacuum manifold and the CARTM tube 409 is a vacuum channel tube
  • the resin from the preform flows along the vacuum channel 423 in the bottom of the CARTM tube 409 and then through the gap 417 into the channel 415 in the manifold.
  • Figure 26 shows a tool 431 with a surface 435 on which is placed a preform 433. A portion ofthe preform is covered with a first flexible impermeable membrane 439. An impermeable spacer system 441 is placed on the first flexible impermeable membrane 439 and sealed at its periphery using a seal 445 to form a bladder. The impermeable spacer system 441 has a network of gaps 443. A second flexible impermeable membrane 437 is placed over the impermeable spacer system 41 and the preform 433, and sealed at its periphery with a seal 447.
  • Figure 27 shows the apparatus of Figure 26 with the first flexible impermeable membrane 439 deformed into the network of gaps in the impermeable spacer system 441 thereby forming temporary resin flow pathways 449 on the preform.
  • Figure 28 shows a tool 451 with a surface 455 on which is placed a preform 453. A portion ofthe preform is covered with a first flexible impermeable membrane 459. A spacer system 463 is placed on the first flexible impermeable membrane 459. A second flexible impermeable membrane 461 is placed over the spacer system 463 and sealed at its periphery using a seal 467. The first flexible impermeable membrane 459, the spacer system 463, and the second flexible impermeable membrane 461 together form a bladder. The spacer system 463 has a network of gaps 465. A third flexible impermeable membrane 457 is placed over the spacer system 463 and the preform 453, and sealed at its periphery with a seal 469.
  • Figure 29 shows the apparatus of Figure 28 with the first flexible impermeable membrane 459 deformed into the network of gaps in the spacer system 463 thereby forming temporary resin flow pathways 471 on the preform.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Cette invention concerne des procédés et un appareil de moulage de pièces composites obtenues par infusion de résine liquide. Cette invention comprend la création de canaux de distribution de résine temporaires sur la surface d'une préforme destinés à participer à la distribution de résine pendant l'infusion. En règle générale, ces procédés améliorent la technique existante du fait qu'ils permettent de réduire le coût de production des moules, de produire des pièces de meilleure qualité, de produire une quantité minimum de déchets ainsi que de réduire le temps de remplissage de la préforme. Des tubes creux à parties mobiles constituent ces canaux qui assistent le moulage par transfert de résine (CARTM) de composites.
PCT/US2002/019942 2002-06-24 2002-06-24 Moulage par transfert de resine assiste par canaux Ceased WO2004000536A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002312578A AU2002312578A1 (en) 2002-06-24 2002-06-24 Channel assisted resin transfer molding
PCT/US2002/019942 WO2004000536A1 (fr) 2002-06-24 2002-06-24 Moulage par transfert de resine assiste par canaux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2002/019942 WO2004000536A1 (fr) 2002-06-24 2002-06-24 Moulage par transfert de resine assiste par canaux

Publications (1)

Publication Number Publication Date
WO2004000536A1 true WO2004000536A1 (fr) 2003-12-31

Family

ID=29998727

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/019942 Ceased WO2004000536A1 (fr) 2002-06-24 2002-06-24 Moulage par transfert de resine assiste par canaux

Country Status (2)

Country Link
AU (1) AU2002312578A1 (fr)
WO (1) WO2004000536A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007054097A1 (fr) * 2005-11-14 2007-05-18 Lm Glasfiber A/S Production d'un stratifie par injection de resine
ITNA20090067A1 (it) * 2009-11-03 2011-05-04 Vincenza Antonucci Sistema di fabbricazione di materiali compositi con infusione pulsata di resina (pulsed infusion).
US8113256B2 (en) 2005-11-14 2012-02-14 Lm Glasfiber A/S Movable injection passages during the manufacture of laminates
EP2700493A1 (fr) * 2012-08-24 2014-02-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Canal en résine de fibre
DE102015219953A1 (de) * 2015-10-14 2017-04-20 Airbus Defence and Space GmbH Vorrichtung und Verfahren zum Herstellen eines Faserverbundbauteils
DE102015219960A1 (de) * 2015-10-14 2017-04-20 Airbus Defence and Space GmbH Vorrichtung und Verfahren zum Herstellen eines Faserverbundbauteils
CN108501406A (zh) * 2017-02-28 2018-09-07 株式会社斯巴鲁 纤维强化复合材料的制造方法
US11065787B2 (en) 2017-10-25 2021-07-20 Subaru Corporation Composite forming jig and composite forming method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322042A2 (fr) * 1987-12-21 1989-06-28 Shell Internationale Researchmaatschappij B.V. Procédé pour réduire le temps du cycle de moulage
US5490602A (en) * 1992-06-15 1996-02-13 Short Brothers Plc Composite structure manufacture
US5601852A (en) * 1993-02-18 1997-02-11 Scrimp Systems, Llc Unitary vacuum bag for forming fiber reinforced composite articles and process for making same
EP1038656A1 (fr) * 1999-03-02 2000-09-27 LS Technologies, Inc. A Pennsylvania Corporation Procédé d'imprégnation de résine par le vide
WO2001002146A1 (fr) * 1999-07-03 2001-01-11 Alan Roger Harper Outil de transfert de resine et procede utilisant une piece rapportee elastomere pour former un canal de coulee
US6406659B1 (en) * 1995-03-28 2002-06-18 Eric Lang Composite molding method and apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322042A2 (fr) * 1987-12-21 1989-06-28 Shell Internationale Researchmaatschappij B.V. Procédé pour réduire le temps du cycle de moulage
US5490602A (en) * 1992-06-15 1996-02-13 Short Brothers Plc Composite structure manufacture
US5601852A (en) * 1993-02-18 1997-02-11 Scrimp Systems, Llc Unitary vacuum bag for forming fiber reinforced composite articles and process for making same
US6406659B1 (en) * 1995-03-28 2002-06-18 Eric Lang Composite molding method and apparatus
EP1038656A1 (fr) * 1999-03-02 2000-09-27 LS Technologies, Inc. A Pennsylvania Corporation Procédé d'imprégnation de résine par le vide
WO2001002146A1 (fr) * 1999-07-03 2001-01-11 Alan Roger Harper Outil de transfert de resine et procede utilisant une piece rapportee elastomere pour former un canal de coulee

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007054097A1 (fr) * 2005-11-14 2007-05-18 Lm Glasfiber A/S Production d'un stratifie par injection de resine
US8113256B2 (en) 2005-11-14 2012-02-14 Lm Glasfiber A/S Movable injection passages during the manufacture of laminates
US8231819B2 (en) 2005-11-14 2012-07-31 Lm Glasfiber A/S Movable injection passages during the manufacturing of laminates
ITNA20090067A1 (it) * 2009-11-03 2011-05-04 Vincenza Antonucci Sistema di fabbricazione di materiali compositi con infusione pulsata di resina (pulsed infusion).
EP2700493A1 (fr) * 2012-08-24 2014-02-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Canal en résine de fibre
DE102012107820A1 (de) * 2012-08-24 2014-02-27 Deutsches Zentrum für Luft- und Raumfahrt e.V. Faserharzkanal
DE102012107820B4 (de) * 2012-08-24 2018-02-08 Deutsches Zentrum für Luft- und Raumfahrt e.V. Faserharzkanal
DE102015219953A1 (de) * 2015-10-14 2017-04-20 Airbus Defence and Space GmbH Vorrichtung und Verfahren zum Herstellen eines Faserverbundbauteils
DE102015219960A1 (de) * 2015-10-14 2017-04-20 Airbus Defence and Space GmbH Vorrichtung und Verfahren zum Herstellen eines Faserverbundbauteils
CN108501406A (zh) * 2017-02-28 2018-09-07 株式会社斯巴鲁 纤维强化复合材料的制造方法
US11065787B2 (en) 2017-10-25 2021-07-20 Subaru Corporation Composite forming jig and composite forming method

Also Published As

Publication number Publication date
AU2002312578A1 (en) 2004-01-06

Similar Documents

Publication Publication Date Title
US6919039B2 (en) Channel assisted resin transfer molding
US6406659B1 (en) Composite molding method and apparatus
CN103492164B (zh) 真空辅助式树脂传递模制工艺以及带有可重复使用式树脂分配管线的设备
US7866969B2 (en) Manufacture of composites by a flexible injection process using a double or multiple cavity mold
US6586054B2 (en) Apparatus and method for selectively distributing and controlling a means for impregnation of fibrous articles
EP2346674B1 (fr) Sac d'infusion réutilisable
CN101242947B (zh) 利用流体密度和压力生产复合材料部件的方法及生产系统
US9205602B2 (en) Method for producing fiber-reinforced plastic
EP1038656A1 (fr) Procédé d'imprégnation de résine par le vide
US6964561B2 (en) High-performance infusion system for VARTM fabrication
EP2647492B1 (fr) Élément d'écoulement de résine pour processus de moulage de transfert de résine sous vide
EP1859920B1 (fr) Procédé et dispositif pour moulage d'une article par moulage par transfert de résine (R.T.M.), l'article comprenant au moins partiellement un stratifié renforcée par des fibres
US20010009313A1 (en) Grooved mold apparatus and process for forming fiber reinforced composite structures
JPWO2011043253A1 (ja) 繊維強化プラスチックの製造方法および装置
US9421717B2 (en) Manufacturing a composite
US10525642B2 (en) Method for infusing resin into a composite laminate
WO2008089334A2 (fr) Procédé et appareil de moulage d'articles composites
WO2004000536A1 (fr) Moulage par transfert de resine assiste par canaux
JPWO2018030470A1 (ja) 繊維強化樹脂成形品の製造方法
EP3266595B1 (fr) Procédé et système d'infusion de résine dans une préforme composite
US8210841B2 (en) Apparatus and method for preform relaxation and flow control in liquid composite molding processes
AU2006265783B2 (en) Composite component production using fluid density and pressure

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP