CN111331878A - Fiber composite material product production mold and method - Google Patents
Fiber composite material product production mold and method Download PDFInfo
- Publication number
- CN111331878A CN111331878A CN202010240133.1A CN202010240133A CN111331878A CN 111331878 A CN111331878 A CN 111331878A CN 202010240133 A CN202010240133 A CN 202010240133A CN 111331878 A CN111331878 A CN 111331878A
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- mold
- die
- production
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- 239000000835 fiber Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 abstract description 9
- 238000005520 cutting process Methods 0.000 abstract description 4
- 239000000945 filler Substances 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 2
- 239000000206 moulding compound Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Images
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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a fiber composite product production mold and a method, wherein the mold is designed according to a product, chopped fiber tows of mixed resin are simply preformed according to the shape of the product, the mold is closed in sequence, the shaped raw material is put into a product mold, and different raw materials are put into different positions of a cavity mold according to the strength requirement of the product and different material directions according to the strength requirement of the product, so that the mold is folded; carrying out high-temperature and continuous high-pressure treatment on the whole die by adopting special forming equipment, and heating the whole die to a resin curing temperature; keeping for 5-25 minutes to finish curing; and taking the product out of the mold, and after the product is molded, performing surface coating or machining and other procedures to complete the whole production process of the product. The invention ensures that the formed product is full of filler, the fiber tows and the resin are uniformly mixed, the structure is compact, the strength is reliable, the pre-forming is approximate without the need of pre-cutting processing, the preparation time is greatly saved, and the production efficiency of the product is improved.
Description
Technical Field
The invention relates to the technical field of production of composite material parts, in particular to a mould and a method for producing a fiber composite material product.
Background
The main principle of the existing technology is to stack woven carbon cloth or sheets, and then hot press or vacuum resin curing molding (refer to the production process of fiber composite materials). Because the sheet is piled up the reason that forms, when the product curved surface is complicated, the die cavity is less or the strengthening rib position is more, this two kinds of technologies can't effectively guarantee that fibrous material and resin fill evenly, can't guarantee the density and the intensity of product. The existing production process is complex in material preparation, materials are prepared according to the high cross section of the product and the like and different shapes when the product is pre-shaped, then the materials are placed into a mold one by one, the mold can be closed and the machine can be operated, and due to the fact that the shapes of all the cross sections are different, sheets with multiple specifications are required to be cut according to the specifications of different cross sections, and the preparation process is complex. Therefore, if a product with a complex structure or curved surface is manufactured in the prior art, the preparation time of each mold product is long, the production efficiency is greatly influenced, and meanwhile, the mold is difficult to preserve heat due to long preparation time, and energy is greatly wasted.
In addition, the product formed by the vacuum process is manually paved in the cavity, and needs multiple layers of isolation materials, so that the precision problem of the product after demoulding cannot be guaranteed, the vacuum forming process cannot manufacture the product with thicker thickness due to the influence of the vacuum negative pressure limit and the resin permeability, the sufficient penetration of the resin cannot be guaranteed even if the product is formed, the sheet is tightly pressed, the strength is difficult to guarantee, and the product is only suitable for thin-wall parts and decorative products.
In addition, the conventional molding process is difficult to meet the shape requirement of a product with a special structure due to the limitation of the specification of the sheet, and the demolding is difficult because the product is formed by stacking the sheets, so that the normal direction stress capability of the sheets is poor, and the requirement of a high-strength product cannot be met.
Disclosure of Invention
The invention aims to provide a fiber composite product production mold and a method, wherein in the mold closing process, materials in a cavity mold are fully pressed, and air in the cavity mold is completely extruded out of the mold, so that the molded product is full of filler, fiber tows and resin are uniformly mixed, the structure is compact, the strength is reliable, the pre-shaping is approximate without pre-cutting processing, the preparation time is greatly saved, the production efficiency of the product is improved, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fiber composite material goods production mould, includes moulding compound mould and die cavity mould, moulding compound lid closes on the die cavity mould, the die cavity mould includes die cavity mould A and die cavity mould B, die cavity mould A and die cavity mould B laminate mutually, the upper surface of die cavity mould A is provided with constant head tank A, be provided with lug A in the constant head tank A, the upper surface of die cavity mould B is provided with constant head tank B, be provided with lug B in the constant head tank B.
Preferably, the cavity die A and the cavity die B are both wedge-shaped blocks.
Preferably, the positioning groove A and the positioning groove B are attached to form a forming groove.
Preferably, the forming groove is filled with raw materials.
Preferably, the raw material is chopped fiber tows of mixed resin.
The invention provides another technical scheme: a method of producing a fibrous composite article comprising the steps of:
s1: designing a mould according to a product;
s2: preparing materials, and simply preforming the chopped fiber tows of the mixed resin according to the shape of a product without a special preforming mold;
s3: sequentially closing the dies, putting the shaped raw materials into a product die, putting different raw materials into different positions of a cavity die according to the strength requirement of the product and different material directions according to the strength requirement of the product, and finishing die folding;
s4: carrying out high-temperature and continuous high-pressure treatment on the whole die by adopting special forming equipment, continuously applying high pressure to completely compress and compact the material, and heating the whole die to the resin curing temperature under the state of continuous high pressure;
s5: keeping for 5-25 minutes to finish curing;
s6: taking out the product from the mold to complete the demolding operation;
s7: after the product is formed, the surface coating or machining and other procedures are carried out, and then the whole production process of the product can be completed.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a fiber composite product production mold and a method, which utilize the characteristic that the mixed raw material is fully infiltrated by chopped fiber tows and resin in advance and has better fluidity after being heated and softened, a certain compression stroke is reserved during product mold design, a certain amount of raw material is properly added during feeding, meanwhile, the raw material in the mold is heated and softened, after the mold is pressed in place, the raw material heated and softened in the cavity mold flows to any position of a mold forming groove under pressure, because the raw material is naturally filled under pressure in the mold, and because the raw material is more than the material required by the product, the material in the cavity mold is fully pressed during mold closing, and the air in the cavity mold is fully extruded out of the mold, thereby ensuring that the formed product is full of filling material, the fiber tows and the resin are uniformly mixed, the structure is compact, and the strength is reliable, because the chopped materials and the filament materials are mixed for use, the materials can be randomly placed or simply prepared into the approximate geometric shape of the product when being pre-shaped or put into a die, the pre-cutting processing is not needed in advance, and the approximate pre-shaping is just performed like a clay kneading person, so that the preparation time is greatly saved, and the production efficiency of the product is improved; in addition, by adopting the design, the product with a complex structure, uneven section and any curved surface appearance is easy to prepare. Because the product is formed by compounding and pressing chopped fiber yarns, the shearing force resistance of the product in all directions is uniform, and the strength is consistent.
Drawings
FIG. 1 is a schematic view of a fiber composite article production mold of the present invention;
FIG. 2 is a schematic view of the shaped stock material of the present invention not placed in the product mold;
FIG. 3 is a schematic view of the shaped stock material of the present invention placed into a product mold;
FIG. 4 is a schematic view of the clamping of the present invention;
FIG. 5 is a schematic drawing of the demolding of the present invention.
In the figure: 1. pressing a material die; 2. a cavity mold; 21. a cavity mold A; 211. positioning a groove A; 22. a cavity mold B; 221. positioning a groove B; 3. a bump A; 4. a bump B; 5. forming a groove; 6. raw materials.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a mold for producing a fiber composite product comprises a pressing mold 1 and a cavity mold 2, wherein the pressing mold 1 is covered on the cavity mold 2, the cavity mold 2 comprises a cavity mold a21 and a cavity mold B22, the cavity mold a21 is attached to the cavity mold B22, the cavity mold a21 and the cavity mold B22 are both wedge-shaped blocks, a positioning groove a211 is arranged on the upper surface of the cavity mold a21, a projection A3 is arranged in the positioning groove a211, a positioning groove B221 is arranged on the upper surface of the cavity mold B22, the positioning groove a211 is attached to the positioning groove B221 to form a molding groove 5, a raw material 6 is placed in the molding groove 5, the raw material 6 is a chopped fiber strand of mixed resin, the chopped fiber strand and the resin are fully soaked in advance, the characteristic of good fluidity after being heated and softened is that a certain compression stroke is reserved when the product mold is designed, a certain amount of raw material 6 is added when the material is fed, meanwhile, the mould is heated to soften the raw material 6 in the mould, after the mould is pressed in place, the heated and softened raw material 6 in the cavity mould 2 flows to any position of the mould forming groove 5 under pressure, because the raw material 6 is naturally filled under pressure in the mould, and because the raw material 6 put in the mould is more than the material required by the product, the material in the cavity mould 2 is fully pressed in the mould closing process, and the air in the cavity mould 2 is completely extruded out of the mould, thereby ensuring that the formed product is full of filler, the fiber tows and the resin are uniformly mixed, the structure is compact, the strength is reliable, because the chopped material and the filament material are mixed for use, the material can be randomly placed or simply prepared into the approximate geometric shape of the product during pre-shaping or mould entering, the pre-cutting processing is not needed in advance, like a clay-kneading person, the approximate pre-shaping is realized, the preparation time is greatly saved, and the production efficiency of the product is improved, a projection B4 is provided in the positioning groove B221.
In order to better illustrate the process flow of fiber composite product production, the present embodiment now proposes a method of fiber composite product production, comprising the steps of:
s1: designing a mould according to a product; s2: preparing materials, and simply preforming the chopped fiber tows of the mixed resin according to the shape of a product without a special preforming mold; s3: sequentially closing the dies, placing the shaped raw material 6 into a product die, and placing different raw materials 6 into different positions of the cavity die 2 according to the product strength requirement and different material directions according to the product strength requirement to complete die folding; s4: carrying out high-temperature and continuous high-pressure treatment on the whole die by adopting special forming equipment, continuously applying high pressure to completely compress and compact the material, and heating the whole die to the resin curing temperature under the state of continuous high pressure; s5: keeping for 5-25 minutes to finish curing; s6: taking out the product from the mold to complete the demolding operation; s7: after the product is formed, the surface coating or machining and other procedures are carried out, and then the whole production process of the product can be completed.
In summary, the mold and method for producing fiber composite material product of the present invention utilize the characteristic that the mixed raw material 6 is fully infiltrated by the chopped fiber tows and the resin in advance, and has good fluidity after being heated and softened, a certain compression stroke is reserved during the product mold design, a certain amount of raw material 6 is properly added during the material feeding, and the mold is heated to soften the raw material 6 in the mold, after the mold is pressed in place, the heated and softened raw material 6 in the cavity mold 2 flows to any position of the mold forming groove 5 due to the pressure, because the raw material 6 is naturally filled in the mold due to the pressure, and because the material 6 is more than the material required by the product, during the mold closing process, the material in the cavity mold 2 is fully pressed, the air in the cavity mold 2 is fully extruded out of the mold, thereby ensuring the filling of the molded product is full, and the fiber tows and the resin are uniformly mixed, the structure is compact, and intensity is reliable, because of the mixed use of chopped material and filament material, the material preshaped or can be put wantonly when going into the mould or simply prepare into the approximate geometry of product, need not to plant in advance and cut processing, like holding between the fingers the mud people, roughly preshaped can, save preparation time greatly to improve the production efficiency of product.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (6)
1. The utility model provides a fiber composite material goods production mould, its characterized in that includes pressing material mould (1) and die cavity mould (2), pressing material mould (1) lid closes on die cavity mould (2), die cavity mould (2) are including die cavity mould A (21) and die cavity mould B (22), die cavity mould A (21) and die cavity mould B (22) are laminated mutually, the upper surface of die cavity mould A (21) is provided with constant head tank A (211), be provided with lug A (3) in constant head tank A (211), the upper surface of die cavity mould B (22) is provided with constant head tank B (221), be provided with lug B (4) in constant head tank B (221).
2. A mould for the production of a fibre composite product according to claim 1, characterised in that the cavity mould a (21) and the cavity mould B (22) are wedge-shaped blocks.
3. A mould for the production of fibre composite products according to claim 1, characterised in that the positioning groove a (211) and the positioning groove B (221) are conformed to form the forming groove (5).
4. A mould for the production of fibre composite products according to claim 3, characterised in that the forming channel (5) is provided with raw material (6).
5. A mould for the production of a fibre composite product according to claim 4, characterised in that the raw material (6) is chopped fibre tows of a mixed resin.
6. A method of producing a fibre composite product according to any one of claims 1-5, characterised in that it comprises the steps of:
s1: designing a mould according to a product;
s2: preparing materials, and simply preforming the chopped fiber tows of the mixed resin according to the shape of a product without a special preforming mold;
s3: sequentially closing the dies, putting the shaped raw material (6) into a product die, putting different raw materials (6) into different positions of the cavity die (2) according to the strength requirement of the product and different material directions according to the strength requirement of the product, and completing die folding;
s4: carrying out high-temperature and continuous high-pressure treatment on the whole die by adopting special forming equipment, continuously applying high pressure to completely compress and compact the material, and heating the whole die to the resin curing temperature under the state of continuous high pressure;
s5: keeping for 5-25 minutes to finish curing;
s6: taking out the product from the mold to complete the demolding operation;
s7: after the product is formed, the surface coating or machining and other procedures are carried out, and then the whole production process of the product can be completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240133.1A CN111331878A (en) | 2020-03-31 | 2020-03-31 | Fiber composite material product production mold and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010240133.1A CN111331878A (en) | 2020-03-31 | 2020-03-31 | Fiber composite material product production mold and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111331878A true CN111331878A (en) | 2020-06-26 |
Family
ID=71176796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010240133.1A Pending CN111331878A (en) | 2020-03-31 | 2020-03-31 | Fiber composite material product production mold and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111331878A (en) |
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2020
- 2020-03-31 CN CN202010240133.1A patent/CN111331878A/en active Pending
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200626 |