CN112537046A - Low-cost mass production process method for preparing large-thickness composite material and forming die thereof - Google Patents
Low-cost mass production process method for preparing large-thickness composite material and forming die thereof Download PDFInfo
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- CN112537046A CN112537046A CN202010341305.4A CN202010341305A CN112537046A CN 112537046 A CN112537046 A CN 112537046A CN 202010341305 A CN202010341305 A CN 202010341305A CN 112537046 A CN112537046 A CN 112537046A
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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
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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
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
- B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
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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
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a low-cost mass production process method for preparing a large-thickness composite material and a forming die thereof; the mold comprises an external mold, an internal mold, a heating pipeline, a bolt, an internal mold block and an ejection device; the process comprises the following steps: A. paving and pasting a composite material blank, B, preheating the composite material blank, C, die pressing and curing, D, demolding and E, recycling the inner die and the lower die. In conclusion, the invention adopts a detachable internal mold form, can simultaneously configure a plurality of internal mold lower molds and design and manufacture different internal molds for use, can effectively match the takt time of mass production of a mold pressing process, improves the production efficiency and reduces the production cost; the preparation of composite materials with different structures is realized, and the design and manufacturing cost of an additional die is reduced; a rapid blank preheating mode is adopted, so that the large-thickness composite material is uniformly heated, and the forming quality and the mechanical property of the composite material are ensured; the application of an internal release agent is cancelled, and the raw material cost is reduced.
Description
Technical Field
The invention relates to the field of material manufacturing, in particular to a low-cost mass production process method for preparing a large-thickness composite material and a forming die thereof.
Background
The mould pressing process is widely applied to the forming of fiber composite materials, and compared with the autoclave process, the mould pressing process has the advantages of low cost, high efficiency and controllable quality. However, for large-thickness composite materials, such as composite plate springs and composite bulletproof plates, the thickness of the composite materials exceeds 10mm, and even reaches 50mm or more, a traditional mold pressing process is adopted, and upper and lower molds are used for carrying out heat conduction to heat the composite materials in a mold cavity, so that on one hand, the heat conduction speed is low, the molding time is long, the efficiency is low, and the large-scale mass production requirements are difficult to meet.
In a conventional composite material molding process, in order to ensure that the composite material is easily separated from a mold after curing molding, a mold release agent is generally coated on the mold. However, for mass production process, a release agent is coated every time one release agent is produced, so that the frequency is too high, the takt time is influenced, the production efficiency is reduced, and the industrial production is difficult to accept. Against this background, the presence of an internal mold release agent solves this problem to some extent. In the uncured stage of the composite material blank, the internal mold release agent is uniformly distributed in the composite material blank, and in the curing process, under the action of pressure and temperature, the internal mold release agent gradually moves from the inside of the composite material blank to the surface of the composite material to form a layer of mold release agent film, so that the composite material is easy to demould. At present, no research has proved that the use of the internal release agent has obvious influence on the performance of the composite material. However, for the large-thickness composite material, the industry is troubled by whether the internal mold release agent completely moves to the surface in the curing process, and the influence of the residual internal mold release agent on the performance of the large-thickness composite material is always a heart disease of the industry.
In addition, for different composite material parts, corresponding dies need to be redesigned and manufactured, and the period is long and the investment is high.
Aiming at the problems of quality, efficiency and cost of the existing large-thickness composite material mould pressing process, particularly large-scale mass production of composite materials, the scheme provides a low-cost mass production process method for preparing the large-thickness composite material and a forming mould thereof.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a low-cost mass production process for preparing a composite material with a large thickness and a forming mold thereof.
According to the technical scheme provided by the embodiment of the invention, the low-cost mass-production forming die for the large-thickness composite material is prepared; the device comprises a mould, wherein the mould comprises an outer mould, an inner mould, a heating pipeline, a bolt, an inner mould block and an ejection device; the outer die comprises an outer die upper die and an outer die lower die, and the inner die comprises an inner die upper die and an inner die lower die; a cavity groove is formed in the cavity of the outer die, and the inner die is placed and fixed in the cavity groove of the outer die; bolt fixing holes with the same diameter and aligned ports are formed in the outer die upper die and the inner die upper die, and the bolts penetrate through the bolt fixing holes of the outer die upper die and the inner die upper die; the inner mold plugging block is fixed inside the bolt fixing hole; the inner die lower die is embedded in the outer die lower die; the heating pipeline is arranged inside the outer die upper die and the outer die lower die; a heating mode of resistance heating or oil heating can be adopted; the ejection device is arranged in the outer die lower die and is positioned below the inner die lower die.
In the invention, the inner mold block is fixed at the bottom of the nut end of the bolt.
In the present invention, the cross sections of the opposing surfaces between the inner mold upper mold and the inner mold lower mold are engaged in shape.
In the invention, a composite material blank is paved on the surface of the inner die lower die.
In the invention, the inner wall of the upper die of the outer die is attached to the outer wall of the upper die of the inner die; the inner die lower die is placed in the cavity groove of the outer die lower die, and a gap is formed between the outer wall of the inner die lower die and the inner wall of the outer die lower die; adopt clearance fit between centre form lower mould and the external mold lower mould, this clearance is about 0.2mm, so not only easily ejecting device effectively ejecting centre form lower mould fast, also can avoid the too big centre form lower mould skew that leads to of clearance between centre form lower mould and the external mold lower mould to influence the shaping quality simultaneously.
In the invention, after the inner mold plugging block is fixed in the plugging block bolt fixing hole, the bottom surface of the inner mold plugging block is flush with the bottom surface of the inner mold upper mold, and the whole working surface can not be ensured to be flat by any protrusion or recess. And filling gaps in the bolt fixing holes by using the inner die plugging blocks to ensure that a working surface formed between the bolt fixing holes and the bottom surface of the inner die upper die is kept flat. The bottom surfaces of the upper die of the outer die and the upper die of the inner die are not required to be parallel and level.
In the invention, the outer die is made of metal materials, such as aluminum alloy, steel and the like; the lower die of the inner die is made of polytetrafluoroethylene, so that the microwave heating effect is not influenced; mould and interior mould sprue on the centre form can be the metal material also can be the polytetrafluoroethylene material, need spray or spread a layer of polytetrafluoroethylene membrane on its surface when mould and interior mould sprue are the metal material on the centre form, polytetrafluoroethylene has the non-sticky characteristic with the resin base body, and the combined material blank can very easily be followed the centre form and separated on the lower mould after the solidification cooling like this to realize the quick drawing of patterns.
The low-cost mass production process method for preparing the large-thickness composite material comprises the following process steps:
A. composite material blank paving paste
And paving a composite material blank on the lower die of the inner die.
B. Composite material blank preheating
And putting the paved composite material blank and the inner die lower die into microwave heating equipment together, setting the preheating temperature and heating the composite material blank.
C. Curing by molding
And after the preheating temperature of the composite material blank reaches the set temperature, quickly transferring the composite material blank and the inner die lower die together from the microwave heating equipment, and quickly putting the composite material blank into the outer die lower die to cure the composite material blank.
D. Demoulding
After the composite material blank is solidified, the inner die lower die is ejected out of the inner die lower die by the ejection device, then the composite material blank and the inner die lower die are moved out of a die pressing area together, and after the composite material blank and the inner die lower die are removed, the composite material blank and the inner die lower die are cooled together.
E. Recycling of the inner mold and the lower mold
After the composite material blank and the inner mold lower mold are cooled together, the solidified and cooled composite material blank is demolded and taken out from the inner mold lower mold, and the solidified and cooled composite material blank is covered on the inner mold lower mold after being taken out and is recycled for paving and pasting the composite material blank again, so that the next composite material production period is started.
In the invention, the number of the internal mold lower dies is a plurality, and a plurality of internal mold lower dies are configured, so that the whole process can be uninterruptedly produced, thereby meeting the requirement of mass production.
In conclusion, the invention has the beneficial effects that:
1) adopt the form of detachable centre form lower mould, dispose a plurality of centre forms lower moulds simultaneously, can effectively match the takt time of mould pressing technology volume production, improve production efficiency, reduction in production cost.
2) The combined mode of the outer die upper die, the outer die lower die, the inner die upper die and the inner die lower die, particularly the application of the polytetrafluoroethylene material on the inner die, ensures the high-efficiency demoulding of the cured composite material, thereby canceling the application of the internal demoulding agent in the formula of the composite material resin, reducing the cost of raw materials on one hand, and eliminating the worry of the use of the internal demoulding agent by the industry on the performance of the composite material on the other hand.
3) Due to the adoption of the matching form of the external mold and the internal mold, different internal molds can be designed and manufactured on the premise that the external mold is fixed, and the same external mold is matched for use, so that the preparation of composite materials with different structures can be realized to a certain extent, and the design and manufacturing cost of an additional mold is further reduced; the inner mold made of polytetrafluoroethylene is easy to process, and the development period of the mold is further shortened.
4) In addition, due to the characteristic of microwave heating, the rapid microwave blank preheating mode is adopted, the problem that temperature gradient exists in the composite material along the thickness direction during traditional heat conduction heating is solved, the large-thickness composite material is uniformly heated, the internal stress of the composite material is eliminated, and the forming quality and the mechanical property of the composite material are ensured.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural view of a mold according to the present invention.
Reference numbers in the figures: 1. the device comprises an outer die, a 2. inner die, a 3. heating pipeline, a 4. bolt, a 5. inner die block, a 6. ejection device, a 7. bolt fixing hole, 8. composite material blank, a 1.1. outer die upper die, a 1.2. outer die lower die, a 2.1. inner die upper die and a 2.2. inner die lower die.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a low-cost mass-production molding die for preparing a large-thickness composite material; the device comprises a mould, wherein the mould comprises an outer mould 1, an inner mould 2, a heating pipeline 3, a bolt 4, an inner mould block 5 and an ejection device 6; the outer die 1 comprises an outer die upper die 1.1 and an outer die lower die 1.2, and the inner die 2 comprises an inner die upper die 2.1 and an inner die lower die 2.2; a cavity groove is formed in the cavity of the outer die 1, and the inner die is placed and fixed in the cavity groove of the outer die 1; bolt fixing holes 7 with the same diameter and aligned ports are formed in the outer die upper die 1.1 and the inner die upper die 2.1, and the bolts 4 penetrate through the bolt fixing holes 7 of the outer die upper die 1.1 and the inner die upper die 2.1; the inner mold block 5 is fixed inside the bolt fixing hole 7; the inner die lower die 2.2 is embedded in the outer die lower die 1.2; the heating pipeline 3 is arranged inside the outer die upper die 1.1 and the outer die lower die 1.2; the ejection device 6 is installed inside the outer mold lower mold 1.2, the ejection device 6 is located below the inner mold lower mold 2.2, and the ejection device 6 is used for ejecting the inner mold lower mold 2.2 from the outer mold lower mold 1.2.
When inserting bolt 4 in bolt fixed orifices 7 and fixed back, insert 7 kinds of bolt fixed orifices with interior mould blockking 5, the upper surface of interior mould blockking 5 supports the nut end of bolt 4, then fixes interior mould blockking 5 in the inside of bolt fixed orifices 7, and the bottom surface of mould 2.1 is gone up to the bottom surface of mould in the fixed back centre mould blockking 5 and the interior mould between looks parallel and level, can not have any projection or sunken so that ensure the level and smooth of whole working face. The space remaining in the bolt fixing hole 7 after the bolt 4 is fixed is filled with the inner die block 5 to ensure the flatness of the working face.
In the mould, the bottom surfaces of the inner mould upper mould 2.1 and the outer mould upper mould 1.1 are not required to be parallel and level.
The cross sections of the opposite faces between the inner die upper die 2.1 and the inner die lower die 1.2 are meshed in shape.
And a composite material blank 8 is paved on the surface of the inner die lower die 2.2.
The inner wall of the outer die upper die 1.1 is attached to the outer wall of the inner die upper die 2.1; the placing of centre form lower mould 2.2 just in the cavity recess of external mold lower mould 1.2 and separate about 0.2 mm's clearance between the outer wall of centre form lower mould 2.2 and the inner wall of external mold lower mould 1.2, adopt clearance fit between centre form lower mould 1.2 and the external mold lower mould 2.2, this clearance is about 0.2mm or so, so not only easily ejecting device 6 effectively ejecting centre form lower mould 2.2 fast, also can avoid the too big centre form lower mould skew that leads to in the clearance between centre form lower mould 2.2 and the external mold lower mould 1.2 to influence the shaping quality simultaneously.
The middle and outer molds 1 on the mold are made of metal; the inner mold lower mold 2.2 is made of polytetrafluoroethylene, so that the microwave heating effect is not influenced; the inner mold upper mold 2.1 and the inner mold plugging block 5 can be made of metal or polytetrafluoroethylene. When the inner mold upper mold 2.1 and the inner mold block 5 are made of metal materials, a polytetrafluoroethylene film is required to be sprayed or paved on the surface of the inner mold upper mold, polytetrafluoroethylene has the characteristic of being not sticky to a resin matrix, and thus the composite material blank 8 can be easily separated from the inner mold lower mold 2.2 after being solidified and cooled, so that rapid demolding is realized.
The upper die 1.1 of the outer die and the upper die 2.1 of the inner die in the die made of the large-thickness composite material are fixed through the bolts 4, so that the upper die 1.1 of the outer die and the upper die 2.1 of the inner die can be conveniently detached, separated, connected and fixed; the outer die lower die 1.2 and the inner die lower die 2.2 are in clearance fit, and the outer die lower die 1.2 and the inner die lower die 2.2 can be quickly separated and matched for use; therefore, the outer die 1 and the inner die 2 can be detached and separated, so that different inner dies 2 can be designed and manufactured according to production requirements on the premise that the outer die 1 is fixed, the same outer die 1 is matched for use, and composite materials with different structures can be prepared to a certain extent, so that the design and manufacturing cost of additional dies is further reduced.
The low-cost mass production process method for preparing the large-thickness composite material comprises the following process steps:
A. composite material blank paving paste
The composite material blank 8 is paved on the inner die lower die 2.2, and due to the fact that the composite material is large in thickness, the thickness of the composite material blank 8 is larger than 10mm, even exceeds 50mm or thicker, the paving quantity is large, and the composite material blank is long in use no matter whether manual paving or automatic paving is adopted. In the process of the mass production process, the mass production takt time of the molding equipment can be matched by configuring a plurality of inner mold lower molds 2.2.
B. Composite material blank preheating
And putting the paved composite material blank 8 and the inner die lower die 2.2 into microwave heating equipment together, setting the preheating temperature and heating the composite material blank 8. Due to the characteristic of microwave heating, the large-thickness composite material blank 8 can be uniformly heated, no temperature gradient exists, and meanwhile, compared with the traditional heat conduction heating, the heating device is high in heating speed and high in heating efficiency. Meanwhile, the material of the inner mold lower mold 2.2 is polytetrafluoroethylene, so that the microwave heating effect is not influenced. The preheating temperature is controlled by adjusting the power and preheating time of microwave heating equipment according to the curing characteristics of the resin, so that on one hand, the composite material blank 8 is ensured to reach the curing temperature and meet the curing requirement; on the other hand, the excessive temperature and the premature curing or imploding of the resin are avoided.
C. Curing by molding
After the preheating temperature of the composite material blank 8 reaches the set temperature, the composite material blank 8 and the inner mold lower mold 2.2 are together quickly transferred out of the microwave heating equipment and are quickly placed into the outer mold lower mold 2.1 to cure the composite material blank 8. The outer die upper die 1.1, the inner die upper die 2.1 and the outer die lower die 1.2 are in a continuous working state, and the temperature is kept at the set temperature required by curing the composite material. At this time, because the composite material blank 8, the outer mold upper mold 1.1, the inner mold upper mold 2.1, the outer mold lower mold 1.2 and the inner mold lower mold 2.2 all reach the curing temperature of the composite material blank 8, after the mold is closed under the action of the press, the laid composite material blank 8 is cured and molded under the action of pressure, temperature and time.
D. Demoulding
After the composite material blank 8 is solidified, the inner die lower die 2.2 is ejected out of the inner die lower die 1.2 by the ejection device 6, then the composite material blank 8 and the inner die lower die 2.2 are moved out of a die pressing area together, and the composite material blank 8 and the inner die lower die 2.2 are cooled after being removed. The centre form lower mould 2.2 is the polytetrafluoroethylene material, and when centre form upper mould 2.1 and centre form sprue 5 were the metal material, spread the polytetrafluoroethylene membrane that has pasted on its surface, with the back of the non-stick characteristic of polytetrafluoroethylene and resin matrix, the combined material after the solidification cooling very easily separates from centre form lower mould 2.2 with the compound material blank 8 together cooling down with centre form lower mould 2.2 to realize the drawing of patterns. Can ensure that the demoulding effect is quickly achieved, so that the demoulding can be carried out without using an internal demoulding agent in the formula of the composite material resin, and the worry of the influence of the use of the internal demoulding agent on the performance of the composite material by the industry is eliminated.
E. Recycling of the inner mold and the lower mold
After the composite material blank 8 and the inner die lower die 2.2 are cooled together, the composite material blank 8 after solidification and cooling is demolded and taken out from the inner die lower die 2.2, and after the composite material blank 8 is taken out, the inner die lower die 2.2 is recycled for paving and pasting the composite material blank 8 again, so that the next composite material production period is started. And through the configuration of a plurality of internal mold lower molds 2.2, the whole process can be uninterruptedly produced, thereby meeting the requirement of mass production.
The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles and techniques that may be employed. Meanwhile, the scope of the present invention is not limited to the specific combinations of the above-described features, and other embodiments in which the above-described features or their equivalents are arbitrarily combined without departing from the spirit of the present invention are also encompassed. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (9)
1. Preparing a low-cost mass-production forming die for the large-thickness composite material; including the mould, characterized by: the die comprises an outer die (1), an inner die (2), a heating pipeline (3), a bolt (4), an inner die block (5) and an ejection device (6); the outer die (1) comprises an outer die upper die (1.1) and an outer die lower die (1.2), and the inner die (2) comprises an inner die upper die (2.1) and an inner die lower die (2.2); a cavity groove is formed in the cavity of the outer die (1), and the inner die is placed and fixed in the cavity groove of the outer die (1); bolt fixing holes (7) with the same diameter and aligned ports are formed in the outer die upper die (1.1) and the inner die upper die (2.1), and the bolts (4) penetrate through the bolt fixing holes (7) of the outer die upper die (1.1) and the inner die upper die (2.1); the inner mold plugging block (5) is fixed inside the bolt fixing hole (7); the inner mold lower mold (2.2) is embedded in the outer mold lower mold (1.2); the heating pipeline (3) is arranged inside the outer die upper die (1.1) and the outer die lower die (1.2); the ejection device (6) is arranged in the outer die lower die (1.2) and the ejection device (6) is positioned below the inner die lower die (2.2).
2. The low-cost mass-production molding die for preparing a large-thickness composite material according to claim 1, wherein: the inner mold plugging block (5) is fixed at the bottom of the nut end of the bolt (4).
3. The low-cost mass-production molding die for preparing a large-thickness composite material according to claim 1, wherein: the cross sections of the opposite surfaces between the inner die upper die (2.1) and the inner die lower die (1.2) are meshed in shape.
4. The low-cost mass production process method for preparing a large-thickness composite material and the forming mold thereof according to claim 1, wherein the forming mold comprises: and a composite material blank (8) is paved on the surface of the inner die lower die (2.2).
5. The low-cost mass-production molding die for preparing a large-thickness composite material according to claim 1, wherein: the inner wall of the outer die upper die (1.1) is attached to the outer wall of the inner die upper die (2.1); the inner die lower die (2.2) is placed in a cavity groove of the outer die lower die (1.2) and a gap is formed between the outer wall of the inner die lower die (2.2) and the inner wall of the outer die lower die (1.2).
6. The low-cost mass-production molding die for preparing a large-thickness composite material according to claim 1, wherein: and after the inner die plugging block (5) is fixed in the bolt fixing hole (7), the bottom surface of the inner die plugging block (5) is flush with the bottom surface of the inner die upper die (2.1).
7. The low-cost mass-production molding die for preparing a large-thickness composite material according to claim 1, wherein: the outer die (1) is made of metal materials; the inner mold lower die (2.2) is made of polytetrafluoroethylene; the inner die upper die (2.1) and the inner die plugging block (5) are made of one of metal and polytetrafluoroethylene.
8. The low-cost mass production process method for preparing the large-thickness composite material is characterized by comprising the following steps of: the process comprises the following steps:
A. composite material blank paving paste
Paving and pasting a composite material blank (8) on the inner die lower die (2.2);
B. composite material blank preheating
Putting the paved composite material blank (8) and the inner die lower die (2.2) into microwave heating equipment together, setting a preheating temperature and heating the composite material blank (8);
C. curing by molding
After the preheating temperature of the composite material blank (8) reaches a set temperature, transferring the composite material blank (8) and the inner die lower die (2.2) out of the microwave heating equipment together, and putting the composite material blank into the outer die lower die (2.1) to cure the composite material blank (8);
D. demoulding
After the composite material blank (8) is solidified, the inner die lower die (2.2) is ejected out of the inner die lower die (1.2) by the ejection device (6), then the composite material blank (8) and the inner die lower die (2.2) are moved out of a die pressing area together, and after removal, the composite material blank (8) and the inner die lower die (2.2) are cooled together;
E. recycling of the inner mold and the lower mold
After the composite material blank (8) and the inner die lower die (2.2) are cooled together, the solidified and cooled composite material blank (8) is demolded and taken out from the inner die lower die (2.2), and after the solidified and cooled composite material blank is taken out, the solidified and cooled composite material blank is covered on the inner die lower die (2.2) and is recycled for paving and pasting the composite material blank (8) again, so that the next composite material production period is started.
9. The low-cost mass production process for preparing a large-thickness composite material according to claim 8, wherein: the number of the inner die lower dies (2.2) is a plurality.
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| CN202010341305.4A CN112537046A (en) | 2020-04-27 | 2020-04-27 | Low-cost mass production process method for preparing large-thickness composite material and forming die thereof |
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| CN202010341305.4A CN112537046A (en) | 2020-04-27 | 2020-04-27 | Low-cost mass production process method for preparing large-thickness composite material and forming die thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654673A (en) * | 2022-03-21 | 2022-06-24 | 中国船舶科学研究中心 | Large-thickness spherical organic glass integral injection molding tool and molding method thereof |
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2020
- 2020-04-27 CN CN202010341305.4A patent/CN112537046A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654673A (en) * | 2022-03-21 | 2022-06-24 | 中国船舶科学研究中心 | Large-thickness spherical organic glass integral injection molding tool and molding method thereof |
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