CN211843287U - Carbon fiber product forming die - Google Patents
Carbon fiber product forming die Download PDFInfo
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- CN211843287U CN211843287U CN201921353177.4U CN201921353177U CN211843287U CN 211843287 U CN211843287 U CN 211843287U CN 201921353177 U CN201921353177 U CN 201921353177U CN 211843287 U CN211843287 U CN 211843287U
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Abstract
The utility model provides a carbon fiber product forming die, which comprises an upper die, a lower die, a plurality of heating pipes and a silica gel sheet; the silica gel piece bond in go up the mould or the bed die inside wall, go up the mould with the size looks adaptation of bed die, go up the mould with the bed die compound die is in order to form the shaping chamber that is used for carbon fiber prepreg preform shaping, go up the mould with the bed die runs through be equipped with a plurality ofly with the parallel through-hole that sets up of inside wall, the even interval distribution of a plurality of through-holes, and adjacent distance between the inside wall is the same, a plurality of heating pipe one-to-one are located in a plurality of through-holes. The utility model provides a technical scheme's beneficial effect is: the carbon fiber prepreg preform is subjected to uniform and stable pressure, so that the pinhole defect on the surface of a carbon fiber product is improved.
Description
Technical Field
The utility model relates to a forming die technical field especially relates to a carbon fiber product forming die.
Background
The mould pressing process mould of the carbon fiber prepreg at the present stage is designed into an upper steel mould structure and a lower steel mould structure, the carbon fiber prepreg is placed in the middle of an upper mould cavity and a lower mould cavity, pressure is provided for the carbon fiber prepreg through the pressing of the upper mould and the lower mould, meanwhile, the carbon fiber prepreg is heated through the mould, and the mould is opened after the heat preservation and pressure maintaining are carried out for a period of time to take out a product.
The conventional carbon fiber composite material prepreg molding process has the advantages of high and stable product performance, fast production cycle, low mold investment, proper cost and the like, so that the process becomes an optimal process for mass production of the carbon fiber prepreg.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a carbon fiber product forming die aims at making the carbon fiber preimpregnation material receive even and stable pressure to improve the pinhole defect on product surface.
The embodiment of the utility model provides a carbon fiber product forming die, which comprises an upper die, a lower die, a plurality of heating pipes and a silica gel sheet;
the silica gel piece bond in go up the mould or the bed die inside wall, go up the mould with the size looks adaptation of bed die, go up the mould with the bed die compound die is in order to form the shaping chamber that is used for carbon fiber prepreg preform shaping, go up the mould with the bed die runs through be equipped with a plurality ofly with the parallel through-hole that sets up of inside wall, the even interval distribution of a plurality of through-holes, and adjacent distance between the inside wall is the same, a plurality of heating pipe one-to-one are located in a plurality of through-holes.
Further, the upper die comprises an upper forming part and two upper pressing parts extending leftwards and rightwards from the left end and the right end of the upper forming part respectively, the lower die comprises a lower forming part and two lower pressing parts extending leftwards and rightwards from the left end and the right end of the lower forming part respectively, and the two upper pressing parts are detachably connected with the two lower pressing parts respectively so that the upper forming part and the lower forming part form a forming cavity for forming a carbon fiber prepreg preform;
the theoretical wall thickness of the carbon fiber product is a, the thickness of the silica gel sheet is b, the compression amount of the silica gel sheet under the molding pressure of the carbon fiber product is c, and after the upper mold and the lower mold are pressed together, the design distance d of a cavity between the upper molding part and the lower molding part is a + b-c.
Furthermore, one of the upper pressing part and the lower pressing part is convexly provided with a guide post extending along the vertical direction, and the other one is provided with a guide groove matched with the guide post, and the guide groove is matched with the guide post to enable the upper die and the lower die to be matched.
Furthermore, one end of the guide post close to the bottom wall of the guide groove is arranged in a pointed manner.
Further, the distance between the outer side wall of the guide pillar and the inner side wall of the guide groove is not more than 0.1 mm.
Further, the distance between the heating pipe and the adjacent inner side wall is 30-40 mm.
Further, the diameter of the heating pipe is 15-20 mm.
Further, the thickness of the silica gel sheet is 1-3 mm.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: through being equipped with the silica gel piece on the inside wall of last mould or bed die for when carbon fiber prepreg located the shaping intracavity, carbon fiber prepreg one side and silica gel piece contact, another side and last mould inside wall or bed die inside wall contact, make at the in-process of exerting pressure to last mould and bed die, carbon fiber prepreg receives even and stable pressure, thereby improves the pinhole defect on product surface.
Drawings
Fig. 1 is a schematic structural view of a carbon fiber product forming mold provided by the present invention;
fig. 2 is a schematic flow chart of a molding method using the carbon fiber product molding die of fig. 1;
in the figure: the device comprises an upper die 1, an inner side wall 101, a through hole 102, a molding cavity 103, an upper molding part 11, an upper pressing part 12, a lower die 2, a lower molding part 21, a lower pressing part 22, a heating pipe 3, a silica gel sheet 4, a carbon fiber prepreg preform 5, a guide post 6 and a guide groove 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a carbon fiber product forming mold, which includes an upper mold 1, a lower mold 2, a plurality of heating pipes 3, and a silica gel sheet 4.
The silica gel sheet 4 is adhered to the inner side wall 101 of the upper mold 1 or the lower mold 2, the thickness of the silica gel sheet 4 is 1-3mm, in the embodiment, the thickness of the silica gel sheet 4 is 2mm, and the silica gel sheet uniformly covers the inner side wall 101 of the upper mold 1 or the lower mold 2.
The size of the upper die 1 is matched with that of the lower die 2, the upper die 1 and the lower die 2 are matched to form a forming cavity 103 for forming the carbon fiber prepreg preform 5, a plurality of through holes 102 are formed in the upper die 1 and the lower die 2 in a penetrating mode and are arranged in parallel with the inner side wall 101, the through holes 102 are evenly distributed at intervals and are adjacent to the same distance between the inner side wall 101, and the heating pipes 3 are arranged in the through holes 102 in a one-to-one correspondence mode. Specifically, the shapes of the through holes 102 and the heating pipe 3 are matched with the shapes of the inner side walls 101 of the upper die 1 and the lower die 2, and the distance between each through hole 102 of the upper die 1 and the inner side wall 101 of the upper die 1 is the same as the distance between each through hole 102 of the lower die 2 and the inner side wall 101 of the lower die 2, so as to ensure the uniformity of heating.
In general, a carbon fiber prepreg before molding is referred to as a carbon fiber prepreg preform, and a carbon fiber prepreg after molding and curing is referred to as a carbon fiber product. The traditional mould pressing process of the carbon fiber prepreg preform 5 is to place the carbon fiber prepreg preform 5 in the forming cavity 103 of the upper mould 1 and the lower mould 2, and provide pressure to the carbon fiber prepreg preform 5 through the pressing of the upper mould 1 and the lower mould 2, so that a pinhole appears on the surface of a carbon fiber product after forming.
The utility model provides a technical scheme, through be equipped with silica gel sheet 4 on the inside wall 101 of last mould 1 or bed die 2, when making carbon fiber prepreg preform 5 locate into die cavity 103, 5 one sides of carbon fiber prepreg preform and the contact of silica gel sheet 4, the another side contacts with inside wall 101 of last mould 1 or bed die 2's inside wall 101, make at the in-process of exerting pressure to last mould 1 and bed die 2, because silica gel sheet 4 has elasticity, make carbon fiber prepreg preform 5 and silica gel sheet 4 be laminated completely, and then make carbon fiber prepreg preform 5 receive even and stable pressure, thereby improve the pinhole defect on carbon fiber product surface.
Further, the upper mold 1 includes an upper molding portion 11 and two upper press-fit portions 12 extending from the left and right ends of the upper molding portion 11 to the left and right, respectively, the lower mold 2 includes a lower molding portion 21 and two lower press-fit portions 22 extending from the left and right ends of the lower molding portion 21 to the left and right, respectively, the two upper press-fit portions 12 are detachably connected to the two lower press-fit portions 22, respectively, so that the upper molding portion 11 and the lower molding portion 21 form a molding cavity 103 for molding the carbon fiber prepreg preform 5, and the shapes of the upper molding portion 11 and the lower molding portion 21 are set according to the shape of a carbon fiber product.
Because the silica gel sheet 4 has a certain compression amount in the pressurizing and heating process, the design distance of the cavity between the upper mold 1 and the lower mold 2 should take the compression of the silica gel sheet 4 into consideration, specifically, the theoretical wall thickness of the carbon fiber product is a, the thickness of the silica gel sheet 4 is b, the compression amount of the silica gel sheet 4 under the molding pressure of the carbon fiber product is c, and after the upper mold 1 and the lower mold 2 are pressed together, the design distance d of the cavity between the upper molding part 11 and the lower molding part 21 is a + b-c, so that the carbon fiber prepreg preform 5 can be uniformly stressed.
In this embodiment, one of the upper pressing portion 12 and the lower pressing portion 22 is convexly provided with a guide post 6 extending in the vertical direction, and the other one is provided with a guide groove 7 engaged with the guide post 6, a plurality of guide posts 6 and guide grooves 7 may be provided, and the guide groove 7 is engaged with the guide post 6 to match the upper mold 1 and the lower mold 2, so that the accuracy of alignment of the upper mold 1 and the lower mold 2 can be ensured, and the mold matching operation of the upper mold 1 and the lower mold 2 can be simplified.
Further, the end of the guide post 6 close to the bottom wall of the guide groove 7 is disposed in a tip, specifically, the outer side wall of the end of the guide post 6 close to the bottom wall of the guide groove 7 is disposed in an inclined manner, so that the distance between the outer side wall of the guide post 6 and the inner side wall of the guide groove 7 gradually decreases from the end close to the bottom wall of the guide groove 7 to the end far away from the bottom wall of the guide groove 7, and as long as the tip of the guide post 6 is located in the guide groove 7, the relative position of the upper mold 1 and the lower mold 2 can be adjusted through the inclined surface, so that the error between the upper mold 1 and the lower mold 2 can be adjusted, and the assembly.
Further, if the distance between the outer side wall of the guide post 6 and the inner side wall of the guide groove 7 is too large, the pressing precision of the upper mold 1 and the lower mold 2 is affected, and the distance between the outer side wall of the guide post 6 and the inner side wall of the guide groove 7 is not more than 0.1mm, so that the pressing error of the upper mold 1 and the lower mold 2 is limited to be within 0.1mm, in this embodiment, the distance between the outer side wall of the guide post 6 and the inner side wall of the guide groove 7 is 0.05 mm.
If the distance between the heating pipe 3 and the adjacent inner side wall 101 is too large, the heating effect of the heating pipe 3 in the forming cavity 103 is not ideal, and if the distance between the heating pipe 3 and the adjacent inner side wall 101 is too small, the press fit between the upper die 1 and the lower die 2 can be affected, in the embodiment, the distance between the heating pipe 3 and the adjacent inner side wall 101 is 30-40mm, so that the press fit between the upper die 1 and the lower die 2 is not affected while the heating effect is ensured.
If the diameter of the heating pipe 3 is too large, heating may be uneven, and if the diameter of the heating pipe 3 is too small, the number of the heating pipes 3 is too large, in this embodiment, the diameter of the heating pipe 3 is 15-20mm, and the larger the size of the upper die 1 and the lower die 2 is, the larger the diameter and the number of the heating pipes 3 are correspondingly.
Specifically, the molding method using the carbon fiber product molding die as described above includes the steps of:
s1, manufacturing a silicone sheet 4 matched with the inner side wall 101 of the upper mold 1 or the lower mold 2, and correspondingly bonding the silicone sheet 4 to the inner side wall 101 through an adhesive;
s2, uniformly spraying a release agent on one side, back to the inner side wall 101, of the silica gel sheet 4;
s3, placing a carbon fiber prepreg preform 5 on the inner side wall 101 without the silicone sheet 4, closing the upper mold 1 and the lower mold 2 (in this embodiment, each guide post 6 is installed in each guide groove 7, and the upper mold 1 and the lower mold 2 are closed), and applying pressure to the carbon fiber prepreg preform 5 by pressing the upper mold 1 and the lower mold 2;
s4, heating the carbon fiber prepreg preform 5 by using the heating pipe 3, and separating the upper mold 1 and the lower mold 2 after pressurizing and heating for a predetermined time to take out the molded carbon fiber product.
Further, the silica gel sheet 4 may be formed by pressing through a mold, or may be obtained by repeatedly and uniformly spraying liquid silica gel on the inner side wall 101 of the upper mold 1 or the lower mold 2 to be cured.
Further, the maximum temperature that the adhesive can bear is 20 ℃ higher than the temperature of the upper mold 1 or the lower mold 2 during molding, so that the silica gel sheet 4 can be prevented from falling off from the inner side wall 101 before the carbon fiber prepreg preform 5 is molded, and the silica gel sheet 4 can be firmly adhered to the inner side wall 101.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. A carbon fiber product forming die is characterized by comprising an upper die, a lower die, a plurality of heating pipes and a silica gel sheet;
the silica gel piece bond in go up the mould or the bed die inside wall, go up the mould with the size looks adaptation of bed die, go up the mould with the bed die compound die is in order to form the shaping chamber that is used for carbon fiber prepreg preform shaping, go up the mould with the bed die runs through be equipped with a plurality ofly with the parallel through-hole that sets up of inside wall, the even interval distribution of a plurality of through-holes, and adjacent distance between the inside wall is the same, a plurality of heating pipe one-to-one are located in a plurality of through-holes.
2. The carbon fiber product forming mold according to claim 1, wherein the upper mold comprises an upper forming portion and two upper press portions extending left and right from left and right ends of the upper forming portion, respectively, and the lower mold comprises a lower forming portion and two lower press portions extending left and right from left and right ends of the lower forming portion, respectively, and the two upper press portions are detachably connected to the two lower press portions, respectively, so that the upper forming portion and the lower forming portion form a forming cavity for forming a carbon fiber prepreg preform;
the theoretical wall thickness of the carbon fiber product is a, the thickness of the silica gel sheet is b, the compression amount of the silica gel sheet under the molding pressure of the carbon fiber product is c, and after the upper mold and the lower mold are pressed together, the design distance d of a cavity between the upper molding part and the lower molding part is a + b-c.
3. The carbon fiber product forming mold according to claim 2, wherein one of the upper nip portion and the lower nip portion is provided with a guide post protruding therefrom and extending in an up-down direction, and the other is provided with a guide groove engaged with the guide post, and the guide groove is engaged with the guide post to clamp the upper mold and the lower mold.
4. The carbon fiber product-forming mold of claim 3, wherein the end of the guide post near the bottom wall of the guide groove is pointed.
5. The carbon fiber product molding die of claim 3, wherein the distance between the outer side wall of the guide post and the inner side wall of the guide groove is not more than 0.1 mm.
6. The carbon fiber product molding die of claim 1, wherein the distance between the heating tube and the adjacent inner side wall is 30-40 mm.
7. The carbon fiber product molding die of claim 1, wherein the heating tube has a diameter of 15 to 20 mm.
8. The carbon fiber product molding die of claim 1, wherein the thickness of the silicone sheet is 1-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353177.4U CN211843287U (en) | 2019-08-20 | 2019-08-20 | Carbon fiber product forming die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921353177.4U CN211843287U (en) | 2019-08-20 | 2019-08-20 | Carbon fiber product forming die |
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| CN211843287U true CN211843287U (en) | 2020-11-03 |
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| CN201921353177.4U Active CN211843287U (en) | 2019-08-20 | 2019-08-20 | Carbon fiber product forming die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561781A (en) * | 2019-08-20 | 2019-12-13 | 武汉格罗夫氢能汽车有限公司 | carbon fiber product forming die and forming method |
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2019
- 2019-08-20 CN CN201921353177.4U patent/CN211843287U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561781A (en) * | 2019-08-20 | 2019-12-13 | 武汉格罗夫氢能汽车有限公司 | carbon fiber product forming die and forming method |
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