CN118617790B - Carbon fiber wheel rim molding method and carbon fiber wheel rim mold - Google Patents
Carbon fiber wheel rim molding method and carbon fiber wheel rim mold Download PDFInfo
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- CN118617790B CN118617790B CN202410878631.7A CN202410878631A CN118617790B CN 118617790 B CN118617790 B CN 118617790B CN 202410878631 A CN202410878631 A CN 202410878631A CN 118617790 B CN118617790 B CN 118617790B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 62
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 62
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000000465 moulding Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 238000005498 polishing Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0003—Producing profiled members, e.g. beams
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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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
本发明公开了一种碳纤维车圈成型方法和碳纤维车圈模具，涉及自行车技术领域，其中，碳纤维车圈成型方法包括：获得轮缘仿形件，在轮缘仿形件上贴料得到轮缘；获得轮圈本体仿形件，在轮圈本体仿形件上贴料得到2/3轮圈本体；获得下模，将2/3轮圈本体置入下模并取出轮圈本体仿形件；在上模贴料得到1/3轮圈本体；将轮缘的一侧拼接于2/3轮圈本体；获得气囊，将气囊置于轮缘和2/3轮圈本体之间；将上模与下模合模以使得1/3轮圈本体与2/3轮圈本体拼接得到轮圈本体；气囊吹气预型，打开上模和下模，得到车圈粗胚。本发明提供的技术方案中，采用先成型部分轮圈本体再拼接轮缘，最后采用合模的方式拼接另一部分轮圈本体，保证了精确定位，提高了产品合格率。
The invention discloses a carbon fiber rim forming method and a carbon fiber rim mold, and relates to the technical field of bicycles, wherein the carbon fiber rim forming method comprises: obtaining a wheel rim profiling part, pasting material on the wheel rim profiling part to obtain a wheel rim; obtaining a wheel rim body profiling part, pasting material on the wheel rim body profiling part to obtain a 2/3 wheel rim body; obtaining a lower mold, placing the 2/3 wheel rim body into the lower mold and taking out the wheel rim body profiling part; pasting material on the upper mold to obtain a 1/3 wheel rim body; splicing one side of the wheel rim to the 2/3 wheel rim body; obtaining an air bag, placing the air bag between the wheel rim and the 2/3 wheel rim body; closing the upper mold with the lower mold so that the 1/3 wheel rim body and the 2/3 wheel rim body are spliced to obtain the wheel rim body; preforming the air bag by blowing, opening the upper mold and the lower mold, and obtaining a wheel rim rough blank. In the technical solution provided by the invention, the method of first forming a part of the wheel rim body and then splicing the wheel rim is adopted, and finally the other part of the wheel rim body is spliced by closing the mold, so as to ensure accurate positioning and improve the product qualification rate.
Description
Technical Field
The invention relates to the technical field of bicycles, in particular to a carbon fiber rim forming method and a carbon fiber rim die.
Background
The manufacturing process of the carbon fiber rim is a high-tech process and generally comprises the following key steps of firstly cutting a high-performance carbon fiber material according to the design shape and size of the rim, then laying the cut carbon fiber strips manually or accurately placing the cut carbon fiber strips in a die by using automatic equipment to form a preliminary structure of the rim, then bonding the carbon fiber strips together by using special resin, hardening the resin by a high-temperature and high-pressure curing process to strengthen the bonding force of a carbon fiber layer and the structural stability of the whole rim, then polishing and shaping the cured rim to ensure the smoothness and the dimensional accuracy of the rim, and finally installing components such as a rim center, spokes, a bearing and the like to complete the assembly of the rim.
In the related art, engineers usually adopt a mode of closing the mold and rolling materials to produce the rim body, namely, the rim body is divided into two parts along the center line, two sides of the rim body are respectively molded in an upper mold and a lower mold, then the upper mold and the lower mold are closed, an air bag is put in the middle of the rim body for blowing and pre-molding, and the air bag is withdrawn to manually splice and pressurize the rim prepreg and the rim body for molding.
By adopting the forming method, the rim and the rim body are assembled in a manual splicing mode, two ends of the rim are required to be spliced with two inner sides of the rim body, after one side is positioned, the other side positioning sight line can be blocked, the rim cannot be positioned, the deviation of part of the rim body and the rim is larger, and the product percent of pass is lower.
Disclosure of Invention
The invention mainly aims to provide a carbon fiber rim forming method and a carbon fiber rim die, and aims to provide a carbon fiber rim forming method which is accurate in splicing of a rim body and a rim, so that the product qualification rate is high.
In order to achieve the above object, the method for forming a carbon fiber rim according to the present invention comprises:
Obtaining a rim profiling piece, and pasting materials on the rim profiling piece to obtain a rim;
obtaining a rim body profiling piece, and pasting materials on the rim body profiling piece to obtain a 2/3 rim body;
Obtaining a lower die, putting the 2/3 rim body into the lower die and taking out the rim body profiling piece;
obtaining an upper die, and pasting materials on the upper die to obtain a 1/3 rim body;
Splicing one side of the rim to the 2/3 rim body;
Obtaining an air bag, and placing the air bag between the rim and the 2/3 rim body;
the upper die and the lower die are matched to enable the 1/3 rim body and the 2/3 rim body to be spliced to obtain a rim body;
And (3) blowing the air bag to perform, and opening the upper die and the lower die to obtain the rim rough blank.
In one embodiment, the method for obtaining the rim body profiling piece, the step of attaching the material to the rim body profiling piece to obtain the 2/3 rim body further comprises the following steps:
confirming two outer ends and bottoms of the rim body profile;
and pasting materials on the rim body profiling piece and ensuring that the material cloth covers the outer end part and the bottom of one of the rim body profiling pieces to obtain a 2/3 rim body.
In one embodiment, the obtaining the lower mold, placing the 2/3 rim body into the lower mold and taking out the rim body profiling member further comprises the steps of:
obtaining a first lower die, wherein the first lower die is provided with a clamping ring groove;
obtaining a second lower die, wherein the second lower die is provided with a clamping protrusion, and the second lower die is spliced with the first lower die;
And placing the 2/3 rim body in a space formed by the first lower die and the second lower die.
In one embodiment, the splicing the one side of the rim to the 2/3 rim body further comprises the following steps:
confirming that one end of the 2/3 rim body is the splicing position of the rim;
and splicing the rims at the splicing positions.
In an embodiment, the step of clamping the upper die and the lower die to splice the 1/3 rim body and the 2/3 rim body to obtain a rim body further includes the following steps:
Confirming an outer peripheral edge position of the second lower die and an inner peripheral edge position of the upper die;
and when the upper die and the lower die are clamped, the outer peripheral edge position of the second lower die is ensured to be abutted with the inner peripheral edge position of the upper die.
In one embodiment, after the rim profiling is obtained and the rim profiling is pasted, the method further comprises the following steps:
Confirming the bottom of the rim body profiling piece, and sticking a U-shaped strip material on the bottom of the rim body profiling piece;
And part of the structure of the 2/3 rim body is attached to the U-shaped strip material.
In one embodiment, the air bag is blown to perform, and the upper die and the lower die are opened to obtain a rough rim blank, which comprises the following steps:
The air bag is blown to perform;
heating the upper die and the lower die, and maintaining the pressure of the upper die and the lower die;
And opening the upper die and the lower die after the upper die and the lower die are cooled.
In one embodiment, after the air bag is blown to perform, the upper die and the lower die are opened to obtain the rough rim blank, the method further comprises the following steps:
polishing the rim rough blank to remove surface burrs;
and (5) coating the rough rim blank.
The invention also provides a carbon fiber rim mold, which comprises a rim profiling part, a rim body profiling part, a lower mold, an upper mold and an air bag, wherein the lower mold comprises a first lower mold and a second lower mold which are detachable, and the upper mold is clamped and arranged on the second lower mold.
In an embodiment, the second lower die comprises a plurality of arc-shaped sheets, and the arc-shaped sheets are sequentially connected end to end.
According to the technical scheme, the carbon fiber rim forming method and the carbon fiber rim die are provided, wherein a rim profiling piece is firstly obtained, a profiling surface which is the same as the rim in appearance is formed on the rim profiling piece, material pasting is carried out on the rim profiling piece to obtain a rim, a rim body profiling piece is obtained, material pasting is carried out on the rim body profiling piece in the same manner of material pasting to obtain a 2/3 rim body, at the moment, the 2/3 rim body obtained in the last step is put into a lower die, the rim body profiling piece is taken out, the upper die is pasted to obtain another 1/3 rim body, one side of the rim obtained in the previous step is spliced to the 2/3 rim body, accurate splicing can be achieved due to the fact that only one side of the rim needs to be positioned in the splicing process, then the upper die and the lower die are matched to enable the other 1/3 rim body to be spliced with the 2/3 rim body, accurate positioning and die assembling can be carried out when the upper die and the lower die are spliced, the rim body and the 2/3 rim body can be accurately spliced, finally the rim body can be spliced, the rim body is pre-formed, and an air bag can be obtained after the air bag is opened, and the air blowing type air bag is formed. In the rim forming process, the problem that the rim and the rim body are spliced and positioned in a large error due to the fact that the rim body is formed firstly and then the rim is spliced is avoided, the rim body is spliced by adopting a mode of firstly forming part of the rim body and then splicing the rim, and finally the rim body is spliced by adopting the mode of closing the die, so that accurate positioning is ensured, and the product qualification rate is improved.
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 in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of steps of a method for forming a carbon fiber rim according to the present invention;
FIG. 2 is a schematic diagram of a carbon fiber rim mold according to the present invention;
FIG. 3 is a schematic view of another angle of the carbon fiber rim mold according to the present invention;
FIG. 4 is a cross-sectional view of the rim body cam of FIG. 2;
FIG. 5 is a schematic view of the internal structure of a rim blank;
fig. 6 is a process flow chart of the carbon fiber rim forming method provided by the invention.
Reference numerals illustrate:
1000. Carbon fiber rim mold, 1, rim profiling piece, 11, rim profiling surface, 2, rim body profiling piece, 21, rim body profiling surface, 211, outer end part, 212, bottom, 3, lower mold, 31, first lower mold, 32, second lower mold, 321, arc piece, 4, upper mold, 5, air bag, 51, air inlet nozzle, 1a, rim, 2a, rim body, 2a1, 2/3 rim body, 2a2, 1/3 rim body, 2b, cavity, 3a, U-shaped strip.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear are referred to in the embodiments of the present invention), the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture, and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B "including a scheme, or B scheme, or a scheme where a and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The manufacturing process of the carbon fiber rim is a high-tech process and generally comprises the following key steps of firstly cutting a high-performance carbon fiber material according to the design shape and size of the rim, then laying the cut carbon fiber strips manually or accurately placing the cut carbon fiber strips in a die by using automatic equipment to form a preliminary structure of the rim, then bonding the carbon fiber strips together by using special resin, hardening the resin by a high-temperature and high-pressure curing process to strengthen the bonding force of a carbon fiber layer and the structural stability of the whole rim, then polishing and shaping the cured rim to ensure the smoothness and the dimensional accuracy of the rim, and finally installing components such as a rim center, spokes, a bearing and the like to complete the assembly of the rim.
In the related art, engineers usually adopt a mode of closing the mold and rolling materials to produce the rim body, namely, the rim body is divided into two parts along the center line, two sides of the rim body are respectively molded in an upper mold and a lower mold, then the upper mold and the lower mold are closed, an air bag is put in the middle of the rim body for blowing and pre-molding, and the air bag is withdrawn to manually splice and pressurize the rim prepreg and the rim body for molding.
By adopting the forming method, the rim and the rim body are assembled in a manual splicing mode, two ends of the rim are required to be spliced with two inner sides of the rim body, after one side is positioned, the other side positioning sight line can be blocked, the rim cannot be positioned, the deviation of part of the rim body and the rim is larger, and the product percent of pass is lower.
In order to solve the above problems, the present invention provides a carbon fiber rim forming method and a carbon fiber rim mold, and aims to provide a carbon fiber rim forming method with high product yield by accurate splicing of a rim body and a rim, and fig. 1 to 6 are schematic structural diagrams of an embodiment provided by the carbon fiber rim forming method of the present invention.
Referring to fig. 1 to 6, the present invention provides a carbon fiber rim forming method, which comprises obtaining a rim profiling 1, attaching a material to the rim profiling 1 to obtain a rim, obtaining a rim body profiling 2, attaching a material to the rim body profiling 2 to obtain a 2/3 rim body 2a1, obtaining a lower mold, placing the 2/3 rim body 2a1 into the lower mold and taking out the rim body profiling 2, obtaining an upper mold, attaching a material to the upper mold 4 to obtain a 1/3 rim body 2a2, splicing one side of the rim to the 2/3 rim body 2a1, obtaining an air bag 5, placing the air bag 5 between the rim and the 2/3 rim body 2a1, clamping the upper mold 4 and the lower mold to splice the 1/3 rim body 2a2 and the 2/3 rim body 2a1 to obtain a rim body, air-blowing the air bag 5, and opening the upper mold 4 and the lower mold to obtain a rim rough blank.
According to the technical scheme, the carbon fiber rim forming method and the carbon fiber rim mold 1000 are provided, wherein a rim profiling piece 1 is firstly obtained, the rim profiling piece 1 is provided with a profiling surface with the same shape as that of a rim, a material is stuck on the rim profiling piece 1 to obtain the rim, a rim body profiling piece 2 is obtained, a material is stuck on the rim body profiling piece 2 to obtain a 2/3 rim body 2a1 in the same manner as that of the material, at the moment, the 2/3 rim body 2a1 obtained in the previous step is placed into a lower mold and the rim body profiling piece 2 is taken out, the material is stuck on an upper mold 4 to obtain another 1/3 rim body 2a2, then one side of the rim obtained in the previous step is spliced on the 2/3 rim body 2a1, because only one side of the rim needs to be positioned in the splicing process, accurate splicing can be achieved, then the upper mold 4 and the lower mold are subjected to mold clamping so that the other 1/3 rim bodies 2a1 and 2/3 rim bodies 2a1 and the splicing can be carried out, at the moment, the upper mold 4 and the lower mold can be positioned in the splicing process, the rim body 2/3 and the rim body 2a 2/3 can be accurately positioned, and the air bag can be accurately opened, and the air bag can be accurately spliced, and the air bag can be opened, and the air bag can be accurately opened, and the air-blown and the rim body can be formed. In the rim forming process, the problem that the rim and the rim body are spliced and positioned in a large error due to the fact that the rim body is formed firstly and then the rim is spliced is avoided, the rim body is spliced by adopting a mode of firstly forming part of the rim body and then splicing the rim, and finally the rim body is spliced by adopting the mode of closing the die, so that accurate positioning is ensured, and the product qualification rate is improved.
In obtaining the rim body contour 2, the step of attaching the rim body 2 to the rim body contour 2 to obtain 2/3 rim body 2a1 specifically includes the steps of firstly confirming two outer ends 211 and a bottom 212 of the rim body contour 2, specifically referring to fig. 4, the two outer ends 211 of the rim body contour 2 are respectively located at edges of the outer peripheral wall of the rim body contour 2, the bottom 212 is located at the inner peripheral wall of the rim body contour 2, attaching the rim body contour 2 after confirming positions of the outer ends 211 and the bottom 212, wherein the attaching is generally a cut carbon cloth, namely, a carbon fiber cloth is a high-performance composite material woven or laminated by carbon fiber yarns, and is widely applied to manufacturing of carbon fiber bicycles due to excellent high strength, high rigidity, light weight, corrosion resistance and the like. The carbon cloth is circumferentially pasted along the rim body profiling piece 2 until one circle is pasted, and the carbon cloth needs to be ensured to cover one of the outer end 211 and the bottom 212 at the same time in the pasting process. In a specific production practice, a carbon cloth with a width of 2/3 is generally cut according to the required carbon cloth width of the rim body as a raw material, and considering that the carbon cloth may shrink in a series of processing operations, the actual width of the carbon cloth may be appropriately increased to meet the production requirement, so as to produce the 2/3 rim body 2a1, specifically, please refer to fig. 6, in which step three is shown as 2/3 rim body 2a1.
In obtaining the lower mold, putting the 2/3 rim body 2a1 into the lower mold and taking out the rim body profiling piece 2 specifically comprises the steps of firstly obtaining a first lower mold 31, specifically referring to fig. 2, wherein the first lower mold 31 is provided with a clamping ring groove, then obtaining a second lower mold 32, the second lower mold 32 is provided with a clamping protrusion, the first lower mold 31 and the second lower mold 32 are spliced through the matching of the clamping ring groove and the clamping protrusion, the second lower mold 32 is formed by splicing a plurality of arc-shaped sheets 321 end to end, specifically referring to fig. 3, during mold opening, the second lower mold 32 can be detached in a blocking manner, so that the drawing mold is avoided due to a certain radian of the bottom 212, then, the 2/3 rim body 2a1 is placed in a space formed by encircling the first lower mold 31 and the second lower mold 32, and the second lower mold 32 are spliced to form a peripheral surface which is attached to the peripheral surface of the 2/3 rim body 2a1, and the supportability of the 2/3 rim body 2a1 can be ensured.
The method for assembling the rim and the 2/3 rim body 2a1 comprises the steps of firstly confirming that one end of the 2/3 rim body 2a1 is the splicing position of the rim, specifically referring to fig. 5 and 6, it can be seen that the upper end of the rim and the upper end of the rim body are flush, and the rim and the 2/3 rim body 2a1 can be assembled by taking the upper end of the rim and the upper end of the rim body as datum points, so that the 2/3 rim body 2a1 is fixed on a lower die, the positioning reliability of the 2/3 rim body 2a1 as the datum points can be ensured, and the rim can be assembled by firstly positioning the 2/3 rim body 2a1 and finding a datum point on the 2/3 rim body 2a 1. By using the positioning component as a stable foundation, the assembly position of the subsequent component can be ensured to be accurate, thereby ensuring the symmetry and balance of the whole rim structure. In addition, the method simplifies the assembly process, reduces errors and deviations possibly occurring in the assembly process, and improves the production efficiency. The use of fiducial marks also helps to achieve standardized production, facilitating quality control and subsequent maintenance work. In summary, this method of assembly provides a solid foundation for stability and durability of the bicycle rim by ensuring accurate relative positions between the components.
In the clamping operation of the upper die 4 and the lower die, the method specifically comprises the steps of firstly confirming the outer peripheral edge position of the second lower die 32 and the inner peripheral edge position of the upper die 4, and ensuring that the outer peripheral edge position of the second lower die 32 is abutted with the inner peripheral edge position of the upper die 4 when the upper die 4 and the lower die are clamped, so that the upper die 4 and the lower die can be surrounded to form a cavity of the rim body. When the 1/3 rim body 2a2 and the 2/3 rim body 2a1 are spliced, the lower die has a guiding function on the upper die 4, so that the butting accuracy of the 1/3 rim body 2a2 and the 2/3 rim body 2a1 can be ensured, and the product qualification rate can be improved.
In one embodiment of the present invention, in order to enhance the structural strength and durability of the rim, the bottom 212 of the rim body is thickened, and more specifically, referring to fig. 5, the manufacturing method is to confirm the bottom 212 of the rim body profile 2, attach a U-shaped strip to the bottom 212 of the rim body profile 2, and attach a portion of the 2/3 rim body 2a1 to the U-shaped strip to form a whole, wherein the bottom 212 of the rim body is the portion of the spoke connected to the rim, and is required to bear the tensile force from the spoke and various stresses during riding. The thickened design provides additional material and support to help distribute and absorb these forces and reduce the risk of deformation or damage to the rim. In addition, the design can also improve the rigidity of the rim, improve riding efficiency and performance, and especially provide better stability and durability when riding at high speed or on rough roads.
The air bag 5 is blown to perform, the upper die 4 and the lower die are opened to obtain a rough rim blank, and the method specifically comprises the following steps of inflating the air bag 5 arranged in a cavity 2b of a rim to expand the air bag 5 to prop up the rim body and the rim, heating the upper die 4 and the lower die, maintaining the pressure of the upper die 4 and the lower die, and opening the upper die 4 and the lower die after the upper die 4 and the lower die are cooled. High temperature and high pressure forming is a key step in the production of carbon fiber rims, and involves placing a mold with laid carbon fiber cloth in an environment (such as a pressure tank or a hot press) capable of providing high temperature and high pressure. During this process, the temperature inside the mold is raised to a level sufficient to melt and flow the resin in the carbon fiber cloth while the applied pressure ensures that the carbon fiber cloth and resin are uniformly bonded and fill all details of the mold. The purpose of this is to fully impregnate and cure the carbon fiber material with the resin into the desired shape while the high pressure helps to expel air and volatiles and reduce voids and defects in the finished product, thereby improving the overall strength and durability of the rim. Through high-temperature high-pressure molding, the structural integrity and performance of the rim can be ensured, and the high requirements of the bicycle rim on strength, rigidity and durability in actual use are met.
After the die is opened, the obtained rim rough blank also has a plurality of burrs, and after the steps, the rim rough blank is required to be polished to remove surface burrs, which is also called post-treatment, and the post-treatment is an important link for ensuring the product quality in the production of the carbon fiber rim and mainly comprises the steps of trimming, polishing, checking and the like. Firstly, the cutting tool is used for removing redundant materials at the rim edge in the trimming process, so that the outline dimension of the rim is ensured to meet the design requirement. And then, the polishing step is to smooth the surface of the rim by a manual or mechanical polishing tool to remove any rough or uneven part, thereby improving the appearance texture of the rim and reducing the air resistance. Careful inspection, including visual inspection and possibly mechanical testing, is then performed to ensure that the rim is free of flaws, cracks or other defects. Finally, the rim may also undergo a painting or lacquering process as required to provide an additional protective layer and an aesthetically pleasing appearance. The entire post-treatment process requires elaborate operations and tight quality control to ensure that each rim achieves high standards of finish and performance.
The invention also provides a carbon fiber rim mold 1000, the carbon fiber rim mold 1000 comprises a rim profiling part 1, a rim body profiling part 2, a lower mold, an upper mold 4 and an air bag 5, the lower mold comprises a detachable first lower mold 31 and a detachable second lower mold 32, the upper mold 4 is clamped on the second lower mold 32, the specific structure of the carbon fiber rim mold 1000 refers to the embodiment, and as the carbon fiber rim mold 1000 adopts all the technical schemes of all the embodiments, at least all the beneficial effects brought by the technical schemes of the embodiments are not repeated here.
The foregoing description is only exemplary embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (8)
1.A method for forming a carbon fiber rim, comprising:
obtaining a rim profiling piece (1), and pasting materials on the rim profiling piece (1) to obtain a rim;
Obtaining a rim body profiling piece (2), and pasting materials on the rim body profiling piece (2) to obtain a 2/3 rim body (2 a 1);
Obtaining a lower die, putting the 2/3 rim body (2 a 1) into the lower die and taking out the rim body profiling piece (2);
Obtaining an upper die (4), and pasting materials on the upper die (4) to obtain a 1/3 rim body (2 a 2);
splicing one side of the rim to the 2/3 rim body (2 a 1);
Obtaining an air bag (5), placing the air bag (5) between the rim and the 2/3 rim body (2 a 1);
clamping the upper die (4) and the lower die so as to splice the 1/3 rim body (2 a 2) and the 2/3 rim body (2 a 1) to obtain a rim body;
the air bag (5) is subjected to air blowing preforming, and the upper die (4) and the lower die are opened to obtain a rim rough blank;
the method comprises the steps of obtaining a rim body profiling piece (2), attaching materials on the rim body profiling piece (2) to obtain a 2/3 rim body (2 a 1), and further comprising the following steps:
-identifying two outer ends (211) and a bottom (212) of the rim body profile (2);
attaching materials to the rim body profiling piece (2) and ensuring that the materials cover one of the outer end part (211) and the bottom part (212) to obtain a 2/3 rim body (2 a 1);
after the rim profiling piece (1) is obtained and the rim profiling piece (1) is pasted, the method further comprises the following steps:
confirming the bottom (212) of the rim body profiling (2), and attaching a U-shaped strip material to the bottom (212) of the rim body profiling (2);
part of the structure of the 2/3 rim body (2 a 1) is attached to the U-shaped strip material.
2. The method for forming a carbon fiber rim according to claim 1, wherein the obtaining of the lower mold, the placing of the 2/3 rim body (2 a 1) into the lower mold and the taking out of the rim body profile (2) further comprise the steps of:
obtaining a first lower die (31), wherein the first lower die (31) is provided with a clamping ring groove;
obtaining a second lower die (32), wherein the second lower die (32) is provided with a clamping protrusion, and the second lower die (32) is spliced with the first lower die (31);
The 2/3 rim body (2 a 1) is arranged in a space formed by the first lower die (31) and the second lower die (32).
3. The method of forming a carbon fiber rim according to claim 1, wherein the splicing of one side of the rim to the 2/3 rim body (2 a 1) further comprises the steps of:
confirming that one end of the 2/3 rim body (2 a 1) is the splicing position of the rim;
and splicing the rims at the splicing positions.
4. The method for forming the carbon fiber rim according to claim 2, wherein the step of clamping the upper die (4) and the lower die to splice the 1/3 rim body (2 a 2) and the 2/3 rim body (2 a 1) to obtain the rim body further comprises the steps of:
confirming an outer peripheral edge position of the second lower die (32) and an inner peripheral edge position of the upper die (4);
When the upper die (4) and the lower die are clamped, the outer peripheral edge position of the second lower die (32) is ensured to be abutted with the inner peripheral edge position of the upper die (4).
5. A carbon fiber rim forming method according to any one of claims 1 to 4, wherein the air bag (5) is blow-preformed, and the upper die (4) and the lower die are opened to obtain a rim blank, comprising the steps of:
The air bag (5) is blown to perform;
Heating the upper die (4) and the lower die, and maintaining the pressure of the upper die (4) and the lower die;
and opening the upper die (4) and the lower die after the upper die (4) and the lower die are cooled.
6. A carbon fiber rim forming method according to any one of claims 1 to 4, characterized in that after the air bag (5) is blow-preformed, the upper die (4) and the lower die are opened to obtain a rim blank, further comprising the steps of:
polishing the rim rough blank to remove surface burrs;
and (5) coating the rough rim blank.
7. A carbon fiber rim mold for a carbon fiber rim molding method as set forth in any one of claims 1 to 6, comprising a rim profiling (1), a rim body profiling (2), a lower mold, an upper mold (4) and an air bag (5), wherein the lower mold comprises a first lower mold (31) and a second lower mold (32) which are detachable, and the upper mold (4) is clamped on the second lower mold (32).
8. The carbon fiber rim mold of claim 7, wherein said second lower mold (32) comprises a plurality of arcuate segments (321), a plurality of said arcuate segments (321) being connected end to end in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410878631.7A CN118617790B (en) | 2024-07-02 | 2024-07-02 | Carbon fiber wheel rim molding method and carbon fiber wheel rim mold |
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| CN202410878631.7A CN118617790B (en) | 2024-07-02 | 2024-07-02 | Carbon fiber wheel rim molding method and carbon fiber wheel rim mold |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6347839B1 (en) * | 2000-09-25 | 2002-02-19 | Polymeric Corporation The | Composite rim |
| CN101850694B (en) * | 2010-06-03 | 2012-04-04 | 深圳市喜德盛碳纤科技有限公司 | Carbon fiber rim and manufacturing method thereof |
| DE102011087921B4 (en) * | 2011-12-07 | 2024-07-18 | Action Composites GmbH | Process for producing a one-piece rim base made of fiber composite material with flange |
| CN104640715B (en) * | 2012-09-24 | 2017-06-13 | 蒂森克虏伯碳成分有限公司 | With the wheel disc being made up of fibrous composite and the wheel rim of fixture |
| CN105773994B (en) * | 2014-12-24 | 2018-04-20 | 林书伟 | Manufacturing method and structure of carbon fiber rim |
| CN106182802A (en) * | 2016-07-23 | 2016-12-07 | 中信戴卡股份有限公司 | A kind of method of curing molding carbon fibre material |
| JP2020026246A (en) * | 2018-08-15 | 2020-02-20 | マーシャル インダストリアル コープ． | Marked rim and process for preparing the same |
| CN111660587A (en) * | 2019-03-08 | 2020-09-15 | 厦门鸿基伟业复材科技有限公司 | Carbon fiber rim with barbs, forming die and preforming process thereof |
| DE102021006134A1 (en) * | 2021-12-13 | 2023-06-15 | Dt Swiss Ag | Method of manufacturing a rim, rim and tooling |
| EP4194225B1 (en) * | 2021-12-13 | 2024-10-09 | DT Swiss AG | Rim and method for manufacturing a rim |
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