CN114274502A - Method for rapidly preparing female die and copying glass fiber reinforced plastic die by using 3D printing technology - Google Patents
Method for rapidly preparing female die and copying glass fiber reinforced plastic die by using 3D printing technology Download PDFInfo
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- CN114274502A CN114274502A CN202111623793.9A CN202111623793A CN114274502A CN 114274502 A CN114274502 A CN 114274502A CN 202111623793 A CN202111623793 A CN 202111623793A CN 114274502 A CN114274502 A CN 114274502A
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Abstract
The invention discloses a method for quickly preparing a female die and duplicating a glass fiber reinforced plastic die by using a 3D printing technology, which comprises the following steps: designing a female die model drawing by using three-dimensional modeling software, carrying out model slicing, and printing a sliced 3D model drawing into a resin die by using 3D equipment by using chopped fiber reinforced resin as a raw material; copying a glass fiber reinforced plastic mold: spraying gel coat on the surface of the female die, polishing and grinding after curing, then paving continuous glass fiber cloth soaked by the resin of the die layer by taking the female die as a template, and then heating and curing the die; the chopped fiber reinforced 3D printing resin material is adopted as a female die material, so that the problem of poor dimensional stability of the material is solved, and the problems of complex and long period of the traditional forming process of the die are solved by combining a 3D printing rapid forming technology.
Description
Technical Field
The invention relates to the field of mold processing, in particular to a method for quickly preparing a female mold and copying a glass fiber reinforced plastic mold by using a 3D printing technology.
Background
The 3D printing technology has the basic principle that a digital light source performs layer-by-layer projection on the surface of liquid photosensitive resin in a surface light mode, and is cured and formed layer by layer, and has the advantages of high printing and forming speed, high precision, high material utilization rate and the like; the chopped fiber reinforced resin material is a resin material which takes chopped fibers as a reinforcement and increases the high performance and high dimensional stability of the traditional 3D printing resin. In patent CN113320073A "a method for manufacturing a mold for 3D printing and foaming mold cavity using chemical foaming agent", the material used for preparing the mold is traditional 3D printing resin, and the product prepared from the material has a relatively large risk of mold deformation when used for a long time, and the patent directly utilizes the 3D printing technology to print the mold, rather than printing a master mold and copying a glass fiber reinforced plastic mold which can be used for a long time; in patent CN109135152A "a method for making a glass fiber reinforced plastic suction mold", a master mold is made by first making gypsum board from a gypsum powder mixture, then carving the gypsum board into a master mold by laser, and then manually pasting and forming the glass fiber reinforced plastic mold.
Disclosure of Invention
In view of the above, the invention aims to provide a method for quickly preparing a master mold and copying a glass fiber reinforced plastic mold by using a 3D printing technology, which solves the problem of poor dimensional stability of a material by using a chopped fiber reinforced 3D printing resin material as a master mold material, and solves the problems of complex and long cycle of the traditional molding process of the mold by combining with the 3D printing quick molding technology.
The invention discloses a method for quickly preparing a female die and reproducing a glass fiber reinforced plastic die by using a 3D printing technology, which comprises the following steps of:
a. preparing a female die: designing a female die model drawing by using three-dimensional modeling software, carrying out model slicing, and printing a sliced 3D model drawing into a resin die by using 3D equipment by using chopped fiber reinforced resin as a raw material;
b. copying a glass fiber reinforced plastic mold: spraying gel coat on the surface of the female die, polishing and grinding after curing, then paving continuous glass fiber cloth soaked by the resin of the die layer by taking the female die as a template, and then heating and curing the die;
further, in the step a, the thickness of the printing layer is 0.02-0.15mm, and the printing speed is 1-120 cm/h;
further, in the step a, the chopped fiber reinforced resin is one or a mixture of more than two of glass fiber reinforced resin, carbon fiber reinforced resin, basalt fiber reinforced resin and aramid fiber reinforced resin;
further, in the step a, the three-dimensional modeling software comprises one or more of CATIA, UG, Solidworks, PRO/E and 3D Max, and the 3D printing equipment comprises one or more of DLP, SLS, SLA and FDM;
further, in the step a, a female die model with the size exceeding the single printing range of the 3D printing equipment can be split in a modularized mode, and after the female die model is completely printed, the female die model is adhered by mechanical connection or adhesive bonding;
in step b, the continuous glass fiber cloth has at least one of the specification of 150 g/square meter, 450 g/square meter, 600 g/square meter, 1200 g/square meter and 1250 g/square meter;
in step b, the mold resin is one or a mixture of two or more of epoxy mold resin, phenolic mold resin, vinyl mold resin, unsaturated mold resin and zero shrinkage mold resin.
The invention has the beneficial effects that: according to the method for quickly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology, the glass fiber reinforced plastic die prepared by using the method has the characteristics of simple process steps, high material dimensional stability, difficulty in deformation and capability of meeting the requirement of batch production. Compared with the traditional 3D printing resin, the short-cut fiber reinforced resin has the advantages of higher mechanical property and high product size stability; and the higher the size stability of the raw material used by the female die is, the better the consistency of the subsequently prepared glass reinforced plastic die is. The model drawing is printed and molded by the 3D printing technology, compared with the traditional method, the working procedures of large-size material preparation, laser engraving and the like are reduced, the process flow is simpler, the working procedure is less in time consumption, and the efficiency is higher.
Detailed Description
The following examples are provided to further illustrate the present invention for better understanding, but the present invention is not limited to the following examples.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available without otherwise specified.
The mechanical property test standard of the material of the invention is as follows:
test standards for tensile properties and elongation at break: GB/T1447 & lt 2005 & gt tensile property test method for fiber reinforced plastics
The method for testing the dimensional stability of the sample piece comprises the following steps: placing a standard tensile sample strip in a room temperature environment for 30 days, and then testing the projection length and the projection width of the sample by using a vernier caliper;
in order to embody the advantages of the invention, the emphasis is on comparing the chopped fiber reinforced resin with the conventional resin printed standard tensile sample bar (the control printing equipment and the surrounding environment are the same); comparing the technological process of the invention with the traditional method for preparing the glass fiber reinforced plastic mold. Each example was tested in a comparative test, and referred to herein as an example.
Example one
The method for rapidly preparing the female die and copying the glass fiber reinforced plastic die by the 3D printing technology comprises the following steps:
a. model printing: and (3) slicing the master model drawing with the size of 50cm multiplied by 50cm into slices with the thickness of 0.025mm, introducing the sliced 3D model drawing into a printing device with the thickness of 0.025mm, selecting chopped glass fiber reinforced resin as a master model material, starting printing, cleaning, and confirming the final shape of the mould.
b. Copying a glass fiber reinforced plastic mold: spraying a mold gel coat resin on the surface of the female mold, wherein the resin type is vinyl gel coat resin, and the spraying thickness is 0.5 mm; after the mould gel coat is preliminarily solidified, laying glass fiber fabrics layer by layer, wherein the specifications comprise 150 g/square meter, 450 g/square meter, 600 g/square meter, 1200 g/square meter and 1250 g/square meter, and the fabrics are flatly rolled by an iron roller at the same time, removing bubbles to ensure that the glue is uniform, and after the specified thickness is reached, laying is finished; and heating and curing the mold, and finally, using high-pressure gas or manual stripping to obtain the glass fiber reinforced plastic mold.
And (3) printing a standard tensile sample by using the chopped glass fiber reinforced resin, and testing the mechanical property and the dimensional stability.
Comparative example 1: preparation of glass fiber reinforced plastic mold by using traditional process
1. Preparing a gypsum board: a rectangular frame is manufactured by customizing wood or silica gel, then gypsum powder mixture is poured into the frame to manufacture a gypsum board, and the gypsum board is stood for solidification.
2. Rough trimming of a female die: the drawing is guided into a lathe to carve the gypsum board, and the process mainly carries out basic treatment on the whole female die so as to ensure that the size and the form of the wooden die are matched with those of the drawing.
3. And (3) finishing the surface of the female die: the process mainly comprises the steps of carrying out surface fine treatment on the whole female die, and mainly comprising whole grinding, polishing, stripping wax polishing and the like.
4. Copying a glass fiber reinforced plastic mold: spraying a mold gel coat resin on the surface of the female mold, wherein the resin type is vinyl gel coat resin, and the spraying thickness is 0.5 mm; after the mould gel coat is preliminarily solidified, laying glass fiber fabrics layer by layer, wherein the specifications comprise 150 g/square meter, 450 g/square meter, 600 g/square meter, 1200 g/square meter and 1250 g/square meter, and the fabrics are flatly rolled by an iron roller at the same time, removing bubbles to ensure that the glue is uniform, and after the specified thickness is reached, laying is finished; and heating and curing the mold.
5. Demoulding of the glass fiber reinforced plastic mould: and (3) using high-pressure gas or manual stripping to obtain the glass fiber reinforced plastic mold.
The mechanical properties and dimensional stability were tested by printing standard tensile specimens with conventional resins (no chopped fiber reinforcement).
Table 1 comparison of the process steps of example 1 with comparative example 1
In comparison between example 1 and comparative example 1, according to the present invention, a 3D printing technique can be used to prepare a master mold and copy a plastic glass mold, and the process for copying the plastic glass mold has fewer steps than the conventional process, a relatively simple process flow, and a higher efficiency.
Table 2 comparison of the properties of example 1 with those of comparative example 1
From a comparison of example 2 and comparative example 2, a better dimensional stability of the printed article is achieved using chopped strand reinforced resin material in combination with 3D printing techniques as described herein.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. A method for rapidly preparing a female die and duplicating a glass fiber reinforced plastic die by using a 3D printing technology is characterized by comprising the following steps of: the method comprises the following steps:
a. preparing a female die: designing a female die model drawing by using three-dimensional modeling software, carrying out model slicing, and printing a sliced 3D model drawing into a resin die by using 3D equipment by using chopped fiber reinforced resin as a raw material;
b. copying a glass fiber reinforced plastic mold: and spraying gel coat on the surface of the female die, polishing and grinding after curing, then paving continuous glass fiber cloth soaked by the resin of the die layer by taking the female die as a template, and then heating and curing the die.
2. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 1, wherein: in the step a, the thickness of the printing layer is 0.02-0.15 mm.
3. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 2, wherein: in the step a, the chopped fiber reinforced resin is one or a mixture of more than two of glass fiber reinforced resin, carbon fiber reinforced resin, basalt fiber reinforced resin and aramid fiber reinforced resin.
4. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 3, wherein: in the step a, the three-dimensional modeling software comprises one or more of CATIA, UG, Solidworks, PRO/E and 3D Max, and the 3D printing equipment comprises one or more of DLP, SLS, SLA and FDM.
5. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 4, wherein the method comprises the following steps: in the step a, a female die model with the size exceeding the single printing range of the 3D printing equipment can be split in a modularized mode, and after the female die model is completely printed, mechanical connection or adhesive bonding is used.
6. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 1, wherein: in the step b, the continuous glass fiber cloth has at least one specification of 150 g/square meter, 450 g/square meter, 600 g/square meter, 1200 g/square meter and 1250 g/square meter.
7. The method for rapidly preparing the female die and reproducing the glass fiber reinforced plastic die by using the 3D printing technology as claimed in claim 6, wherein: in the step b, the mold resin is one or a mixture of more than two of epoxy mold resin, phenolic mold resin, vinyl mold resin, unsaturated mold resin and zero shrinkage mold resin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111623793.9A CN114274502A (en) | 2021-12-28 | 2021-12-28 | Method for rapidly preparing female die and copying glass fiber reinforced plastic die by using 3D printing technology |
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| CN202111623793.9A CN114274502A (en) | 2021-12-28 | 2021-12-28 | Method for rapidly preparing female die and copying glass fiber reinforced plastic die by using 3D printing technology |
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| CN114274502A true CN114274502A (en) | 2022-04-05 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666750A (en) * | 2016-03-17 | 2016-06-15 | 路文虎 | Preparation process and casting mould for cast product based on 3D printing technology |
| CN111361172A (en) * | 2020-03-11 | 2020-07-03 | 东风柳州汽车有限公司 | Hand-pasted glass fiber reinforced plastic punching device and manufacturing method thereof |
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2021
- 2021-12-28 CN CN202111623793.9A patent/CN114274502A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666750A (en) * | 2016-03-17 | 2016-06-15 | 路文虎 | Preparation process and casting mould for cast product based on 3D printing technology |
| CN111361172A (en) * | 2020-03-11 | 2020-07-03 | 东风柳州汽车有限公司 | Hand-pasted glass fiber reinforced plastic punching device and manufacturing method thereof |
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