CN116373352A - Deformation correction method and device for composite material pultrusion part - Google Patents
Deformation correction method and device for composite material pultrusion part Download PDFInfo
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- CN116373352A CN116373352A CN202310445448.3A CN202310445448A CN116373352A CN 116373352 A CN116373352 A CN 116373352A CN 202310445448 A CN202310445448 A CN 202310445448A CN 116373352 A CN116373352 A CN 116373352A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000012937 correction Methods 0.000 title claims abstract description 15
- 238000007664 blowing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 21
- 230000008093 supporting effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000465 moulding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/525—Component parts, details or accessories; Auxiliary operations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to the technical field of composite material pultrusion processes, in particular to a deformation correction method and device for a composite material pultrusion part, wherein the method comprises the following steps of: preparing a pultruded part, and continuously demolding the pultruded part; inserting the balloon from the free end of the pultruded piece such that the tip of the balloon extends to a set length; continuing to inflate the air bag so that the side wall of the air bag is attached to the inner wall of the pultrusion; maintaining the pressure of the balloon within a set range and allowing the balloon to move along the pultrusion for a set time or distance; the balloon is removed from the pultrusion and the balloon-supported pultrusion is severed and the next balloon support cycle is continued. The invention has the advantages that the operation is simple and convenient, the construction time is short, the construction time and the progress are convenient to grasp, the whole correction process is carried out on line, the supporting correction effect can be realized in time within the optimal time of deformation, and the problem of deformation and sinking of the pultrusion product in the die-stripping process is further solved.
Description
Technical Field
The invention relates to the technical field of composite material pultrusion processes, in particular to a method and a device for correcting deformation of a composite material pultrusion product.
Background
The composite material pultrusion process refers to a process that the impregnated continuous fiber passes through a forming die with a certain section shape, is solidified and formed in a die cavity, is ejected from the die and is heated and solidified, and can continuously pull out a section product with infinite length under the action of traction mechanical tension; however, the inventor finds that when the pultrusion process is implemented, when a workpiece with a cavity is produced, when the pultrusion workpiece is just out of a die, the temperature at the outlet of the die is higher than the external temperature, at the moment, the cavity area of the workpiece has the phenomenon of concave deformation due to cooling shrinkage of the pultrusion workpiece, and the larger the cavity is, the thinner the wall thickness of the product is, the more obvious the concave deformation is, and the problem of the concave is difficult to solve only by adjusting the process.
In the related art, deformation prevention of the pultruded profile is achieved by adding filler into the finished product after the finished product is molded, namely, the deformation is reduced by filling solid particles into the finished product after the finished product is molded, however, when the scheme is implemented, the inventor finds that the technical requirement of the scheme is higher, the process is in a high-temperature state when the finished product is ejected, the filler is required to be filled at the moment, the filling compactness of the filler is required to be held, the product of the finished product is raised due to the fact that the compactness is too high, and the quality of the molded product can be further affected if the filling time and the filling progress are not well held in the process of cooling the pultruded die.
Disclosure of Invention
In view of at least one of the above technical problems, the present invention provides a method and an apparatus for correcting deformation of a composite material pultrusion product, which solve the problem of dishing of the pultrusion product by adjusting the process.
According to a first aspect of the present invention there is provided a method of correcting deformation of a composite pultruded article comprising the steps of:
preparing a pultruded part, and continuously demolding the pultruded part;
inserting the balloon from the free end of the pultruded piece such that the tip of the balloon extends to a set length;
continuing to inflate the air bag so that the side wall of the air bag is attached to the inner wall of the pultrusion;
maintaining the pressure of the balloon within a set range and allowing the balloon to move along the pultrusion for a set time or distance;
the balloon is removed from the pultrusion and the balloon supported pultrusion is severed and the next balloon support cycle is continued.
In some embodiments of the invention, the balloon is in a rolled state prior to insertion into the pultrusion, and the balloon is extended unreeled within the pultrusion by blowing.
In some embodiments of the invention, the balloon is in a contracted state in the length direction before being inserted into the pultrusion, and the balloon is extended in the pultrusion by blowing.
In some embodiments of the invention, the balloon is in a straightened state prior to insertion into the pultrusion with a gap between its outer wall and the inner wall of the pultrusion that is inserted into the interior of the pultrusion as the extrusion of the pultrusion proceeds.
In some embodiments of the invention, the air pump adjusts the pressure according to the pressure change of the air bag so as to adapt to different deformation degrees.
According to a second aspect of the present invention there is also provided a composite material pultrusion deformation correction device for use in a composite material pultrusion deformation correction method according to any of the first aspects, comprising: the air bag is in a strip-shaped hollow structure when being unfolded, and the air bag is connected with the air pump;
the device is arranged at one side of a forming die of a pultrusion product, the air bag is used for being plugged into the pultrusion product after the pultrusion product in the forming die is pulled and extruded for a set distance, and the air pump is used for charging and maintaining gas with set pressure after the air bag is plugged into the pultrusion product, so that the air bag supports the inner wall of the pultrusion product, and the deformation caused by cooling of the product is avoided;
the device also comprises a sliding rail which is arranged in parallel with the drawing and extruding piece in the drawing and extruding direction, and a transverse moving driving piece which is arranged on the sliding rail, wherein the air pump is fixed on the transverse moving driving piece and is used for driving the air bag to synchronously move along with the drawing and extruding piece and the air bag to be drawn out from the drawing and extruding piece.
In some embodiments of the invention, the balloon is rolled, lengthwise compressed, or straightened prior to entry into the pultrusion.
In some embodiments of the invention, the cross-section of the balloon is contoured to the inner wall of the pultrusion.
In some embodiments of the present invention, the air bag is further provided with a pressure sensing part, and the air pump adjusts the air pressure according to the pressure variation of the pressure sensing part so as to adapt to different deformation degrees of the pultrusion part.
In some embodiments of the present invention, the air bag further has a strip-shaped deformation sensor thereon for adjusting the deformation degree of the air bag after the air bag is attached to the inner wall of the pultrusion piece, and the air pump adjusts the internal pressure of the air bag according to the deformation degree of the deformation sensor.
The beneficial effects of the invention are as follows: according to the invention, the support of the inside of the pultrusion product is realized through the air bag, and the support of the inner wall of the product is realized through the mode of filling the air bag with gas with set pressure, so that the problem of sinking of the product in the cooling and solidifying process is avoided; compared with the prior art, the method has the advantages that the air bag is only required to be plugged for inflation, the operation is simple and convenient, the construction time is short, the construction time and the progress are convenient to grasp, the whole correction process is carried out on line, the supporting and correcting effect can be timely realized in the deformation optimal time, and the problem of deformation and sinking of the pultrusion in the die-stripping process is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a flow chart illustrating steps of a method for correcting deformation of a composite pultrusion according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a bladder inserted in a pultruded article according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a composite material pultrusion deformation correction device according to an embodiment of the present invention;
FIG. 4 is a top view of a composite pultrusion deformation correction device according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4 in accordance with an embodiment of the present invention;
FIG. 6 is an enlarged view of a portion of the portion B of FIG. 5 in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view showing an airbag extension structure in the form of a roll material in an embodiment of the present invention;
FIG. 8 is a schematic view of an airbag extension in compressed form in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of an extended configuration of an airbag in a straightened form in accordance with an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
A method of correcting deformation of a composite pultrusion as shown in fig. 1, comprising the steps of:
s10: preparing a pultruded part, and continuously demolding the pultruded part; it should be noted that the pultrusion process refers to a composite material molding process method in which continuous fibers or fabrics are impregnated with resin under the traction of a traction device and the resin is cured by heating a molding die, so that continuous molding is achieved, and a pultruded part pulled and extruded from the molding die is molded without additional dies for processing; the problem to be solved in the embodiment of the invention is that the inner wall of the pultruded product is sunken due to the change of temperature after the pultruded product comes out of the forming die;
s20: inserting the balloon from the free end of the pultruded piece such that the tip of the balloon extends to a set length; in the embodiment of the present invention, since the pultruded product is continuously formed by pulling and extruding outwards, the air bag needs to be plugged in the process of pulling and extruding the die, and the specific plugging mode has various modes, and the following parts of the embodiment of the present invention will be described in detail;
s30: continuing to inflate the air bag so that the side wall of the air bag is attached to the inner wall of the pultrusion; when the air bag is plugged into the pultrusion piece and reaches the maximum length of the air bag, the air bag is continuously inflated to be attached to the inner wall of the pultrusion piece, so that the supporting effect is achieved, and the sinking of the air bag caused by the reduction of temperature is prevented; the specific fitting structure is shown in fig. 2, and the air bag 1 is fitted with the inner wall of the pultrusion piece 01, so that the supporting and correcting effects are achieved, and the deformation of the pultrusion piece is prevented.
S40: maintaining the pressure of the balloon within a set range and allowing the balloon to move along the pultrusion for a set time or distance; because the deformation of the pultrusion is concentrated in a period of time after the die is removed, in the embodiment of the invention, the effect of preventing the deformation or correcting the deformation is achieved after the air bag moves for a certain time along with the pultrusion;
s50: the balloon is removed from the pultrusion and the balloon-supported pultrusion is severed and the next balloon support cycle is continued. It should be noted that the next balloon supporting cycle means that after the front-stage pultrusion is cut off, the remaining portion is further plugged with the balloon until the balloon extends to the maximum length, then the balloon 1 is inflated to achieve the deformation correcting effect, and then the balloon is extracted and cut.
In the embodiment, the support of the interior of the pultrusion product is realized through the air bag, and the support of the inner wall of the product is realized through the mode of filling the air bag with the gas with the set pressure, so that the problem of the dent of the product in the cooling and solidifying process is avoided; compared with the prior art, the method has the advantages that the air bag is only required to be plugged for inflation, the operation is simple and convenient, the construction time is short, the construction time and the progress are convenient to grasp, the whole correction process is carried out on line, the supporting and correcting effect can be timely realized in the deformation optimal time, and the problem of deformation and sinking of the pultrusion in the die-stripping process is solved.
On the basis of the above-described examples, in the examples of the present invention, the specific structural form for the insertion of the airbag 1 is shown in fig. 7 to 9, and in one embodiment of the present invention, as shown in fig. 7, the airbag 1 is in a rolled state before the insertion of the pultrusion 01, and the airbag 1 is unreeled and extended in the pultrusion 01 by blowing. That is, the initial state of the airbag 1 is in the form of a roll before the airbag 1 is inserted into the pultrusion 01; when the air bag 1 is required to be placed in the pultrusion piece 01, the air bag 1 is unreeled under the action of air pressure in a mode of blowing towards the air bag 1; it should be noted that, at this time, the maximum diameter of the roll of the air bag 1 is smaller than the maximum distance between the two opposite inner walls of the inner cavity of the pultrusion product 01, so that smooth unreeling of the air bag 1 can be ensured, and after the air bag 1 is completely unreeled from the roll shape into a strip shape, air is continuously blown to the air bag 1, so that the air bag 1 is inflated until the air bag is attached to the inner wall of the pultrusion product 01.
In another embodiment of the invention, as shown in fig. 8, the balloon 1 is contracted in the length direction before being inserted into the pultrusion 01, and the balloon 1 is extended in the pultrusion 01 by blowing. It should be noted here that the contraction of the balloon 1 in the longitudinal direction may be in the form of, for example, a bellows, the contraction of the balloon 1 by inhalation, and then the elongation of the balloon 1 in the longitudinal direction by blowing are performed until the maximum length of the balloon 1 is reached, at which time the balloon 1 is expanded to achieve the supporting effect.
In yet another embodiment of the invention, as shown in fig. 9, the balloon 1 is in a straightened state prior to insertion into the pultrusion 01, with a gap between its outer wall and the inner wall of the pultrusion 01, and is inserted into the interior of the pultrusion 01 as the extrusion of the pultrusion 01 proceeds. In this embodiment, a form that the air bag 1 is not moved and the pultrusion piece 01 is moved is adopted, namely, one end of the air bag 1 is fixed and the other end is suspended under the action of air pressure, then the pultrusion piece 01 is sleeved on the air bag 1 along with extrusion of the pultrusion piece 01, and along with continuous outward pultrusion of the pultrusion piece 01, the effect that the air bag 1 continuously moves towards the inside of the pultrusion piece 01 is achieved. After the pultrusion piece 01 reaches the tail end of the air bag 1, the air bag 1 moves along with the pultrusion piece 01, and the air blowing is continued to realize the bonding of the side wall of the air bag 1 and the inner wall of the pultrusion piece 01, so that the supporting function of the air bag is realized.
On the basis of the above embodiments of the present invention, in some embodiments of the present invention, the other end of the air bag 1 is connected to the air bag 1 for inflating the air bag 1, and the air pump 2 adjusts the pressure according to the pressure change of the air bag 1 to adapt to different deformation degrees. That is, when the pressure applied to the inside of the airbag 1 is found to be large, it is explained that the pultrusion product 01 is about to deform at this time, and the strong support is realized by continuing to pressurize the airbag 1, so that the deformation of the pultrusion product 01 is reduced. Another aspect of the embodiments of the present invention further provides a composite material pultrusion deformation correcting device as shown in fig. 3 to 6, which is applied to the above-mentioned composite material pultrusion deformation correcting method, and some embodiments of the deformation correcting device according to the embodiments of the present invention are described in detail below, as shown in fig. 3, where the device includes an air pump 2 and an air bag 1, the air bag 1 has a strip-shaped hollow structure when deployed, and the air bag 1 is connected to the air pump 2;
the device is arranged on one side of a forming die 4 of a pultrusion product 01, an air bag 1 is used for being plugged into the pultrusion product 01 after the pultrusion product 01 in the forming die 4 is pulled and extruded for a set distance, and an air pump 2 is used for charging and maintaining gas with set pressure after the air bag 1 is plugged into the pultrusion product 01, so that the air bag 1 supports the inner wall of the pultrusion product 01, and deformation caused by cooling after the pultrusion product 01 is taken out of the die is avoided;
the device also comprises a sliding rail 3 which is arranged in parallel with the drawing and extruding piece 01 in the drawing and extruding direction, and a transverse moving driving piece which is arranged on the sliding rail 3, wherein the air pump 2 is fixed on the transverse moving driving piece and is used for driving the air bag 1 to synchronously move along with the drawing and extruding piece 01 and the air bag 1 to be drawn out from the drawing and extruding piece 01. It should be noted that the traversing driving member has various forms, for example, a driving structure formed by meshing a motor gear with a rack, or other conventional structural forms; by arranging the transverse moving driving piece, the relative static or relative movement of the air bag 1 and the pultrusion piece 01 is realized, so that the effect that the air bag 1 is plugged into the pultrusion piece 01 when the pultrusion piece 01 is ejected is satisfied, and after the air bag 1 has a supporting effect, the air bag 1 is deflated and the air bag 1 is pulled out from the pultrusion piece 01; the pulling-out can be realized by taking in air to enable the air bag 1 to contract and simultaneously utilizing the transverse moving driving piece to generate relative moving away from the pultrusion piece 01 to realize the separation from the pultrusion piece 01.
Based on the above embodiments, in some embodiments of the invention, the balloon 1 is rolled, compressed lengthwise, or straightened prior to entering the pultrusion 01. The specific structural form of the airbag 1 has been mentioned above, and those skilled in the art will understand in connection with the context, and will not be described here again.
In the embodiment of the invention, the section of the air bag 1 is arranged in a profile with the inner wall of the pultrusion 01. The cross section of the air bag 1 here refers to the structural shape of the air bag 1 before the air bag 1 is inflated to be attached to the inner wall of the pultrusion product 01, for example, the cross section of the air bag 1 is rectangular when the pultrusion product 01 is rectangular, and the cross section of the air bag 1 is circular when the pultrusion product 01 is circular.
In some embodiments of the present invention, in order to monitor the change of the pressure in the air bag 1 in real time, the air bag 1 is further provided with a pressure sensing member, and the air pump 2 adjusts the air pressure according to the pressure variation of the pressure sensing member so as to correspond to different deformation degrees of the pultrusion product 01. The pressure sensing piece can be a pressure gauge arranged on the connecting pipe or a pressure sensor arranged on the air bag 1, and an automatic pressure regulating structure can be arranged through sensing and feedback of the pressure so as to meet the requirement of further improving the deformation resistance of the pultrusion piece 01. In particular, the deformation of the pultrusion 01 can be suppressed by measuring the internal pressure profile of the pultrusion 01 during the deformation and then measuring the corresponding desired support pressure.
In the embodiment of the invention, besides sensing the pressure, the air bag 1 is also provided with a strip-shaped deformation sensor for the deformation degree of the air bag 1 after being attached to the inner wall of the pultrusion piece 01, and the air pump 2 adjusts the internal pressure of the air bag 1 according to the deformation degree of the deformation sensor. The degree of deformation of the pultrusion 01 during the cooling and curing process can be known by the deformation sensor to ensure that the pressure conditions through the balloon 1 are such that the degree of deformation of the pultrusion 01 is within the allowable controllable range.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for correcting deformation of a composite pultruded article, comprising the steps of:
preparing a pultruded part, and continuously demolding the pultruded part;
inserting the balloon from the free end of the pultruded piece such that the tip of the balloon extends to a set length;
continuing to inflate the air bag so that the side wall of the air bag is attached to the inner wall of the pultrusion;
maintaining the pressure of the balloon within a set range and allowing the balloon to move along the pultrusion for a set time or distance;
the balloon is removed from the pultrusion and the balloon supported pultrusion is severed and the next balloon support cycle is continued.
2. The method of claim 1, wherein the balloon is in a rolled state prior to insertion into the pultrusion, and the balloon is extended in the pultrusion by blowing.
3. The method of claim 1, wherein the balloon is contracted in the longitudinal direction before being inserted into the pultrusion, and the balloon is inflated to extend within the pultrusion.
4. The method of claim 1, wherein the bladder is in a straightened state prior to insertion into the pultrusion with a gap between the outer wall and the inner wall of the pultrusion and is inserted into the interior of the pultrusion as the pultrusion is extruded.
5. The method of claim 1, wherein the air pump adjusts the pressure to accommodate different degrees of deformation based on the pressure change of the bladder.
6. A composite material pultrusion deformation correction device for use in a composite material pultrusion deformation correction method according to any of claims 1 to 5, comprising: the air bag is in a strip-shaped hollow structure when being unfolded, and the air bag is connected with the air pump;
the device is arranged at one side of a forming die of a pultrusion product, the air bag is used for being plugged into the pultrusion product after the pultrusion product in the forming die is pulled and extruded for a set distance, and the air pump is used for charging and maintaining gas with set pressure after the air bag is plugged into the pultrusion product, so that the air bag supports the inner wall of the pultrusion product, and the deformation caused by cooling of the product is avoided;
the device also comprises a sliding rail which is arranged in parallel with the drawing and extruding piece in the drawing and extruding direction, and a transverse moving driving piece which is arranged on the sliding rail, wherein the air pump is fixed on the transverse moving driving piece and is used for driving the air bag to synchronously move along with the drawing and extruding piece and the air bag to be drawn out from the drawing and extruding piece.
7. The composite material pultrusion deformation correction device of claim 6, wherein the balloon is rolled, lengthwise compressed, or straightened prior to entry into the pultrusion.
8. The composite material pultrusion deformation correction device of claim 6, wherein a cross-section of the balloon is contoured to an inner wall of the pultrusion.
9. The composite material pultrusion deformation correcting device according to claim 6, wherein the air bag is further provided with a pressure sensing piece, and the air pump adjusts the air pressure according to the pressure variation of the pressure sensing piece so as to adapt to different deformation degrees of the pultrusion.
10. The composite material pultrusion deformation correcting device according to claim 6, wherein the air bag is further provided with a strip-shaped deformation sensor for the deformation degree of the air bag after the air bag is attached to the inner wall of the pultrusion, and the air pump adjusts the internal pressure of the air bag according to the deformation degree of the deformation sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310445448.3A CN116373352B (en) | 2023-04-24 | 2023-04-24 | Deformation correction method and device for composite material pultrusion part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310445448.3A CN116373352B (en) | 2023-04-24 | 2023-04-24 | Deformation correction method and device for composite material pultrusion part |
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| CN116373352B CN116373352B (en) | 2023-10-13 |
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| CN1883912A (en) * | 2006-06-06 | 2006-12-27 | 天津工业大学 | Method for producing sealing rubber air-bag male die and resin transfer molding method therefor |
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| US20110120636A1 (en) * | 2009-11-20 | 2011-05-26 | Lockheed Martin Corporation | Pultruded Arc-Segmented Pipe |
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| US20180187645A1 (en) * | 2017-01-05 | 2018-07-05 | General Electric Company | Method for Manufacturing a Wind Turbine Rotor Blade Root Section with Pultruded Rods and Associated Wind Turbine Blade |
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| CN210283316U (en) * | 2019-07-02 | 2020-04-10 | 常州市新创智能科技有限公司 | Pultruded profile guiding device |
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