CN115157706A - Resin mineral composite material ultrasonic vibration defoaming device and process - Google Patents
Resin mineral composite material ultrasonic vibration defoaming device and process Download PDFInfo
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- CN115157706A CN115157706A CN202210816678.1A CN202210816678A CN115157706A CN 115157706 A CN115157706 A CN 115157706A CN 202210816678 A CN202210816678 A CN 202210816678A CN 115157706 A CN115157706 A CN 115157706A
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- 239000002131 composite material Substances 0.000 title claims abstract description 61
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 54
- 239000011707 mineral Substances 0.000 title claims abstract description 54
- 229920005989 resin Polymers 0.000 title claims abstract description 51
- 239000011347 resin Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 57
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000011417 postcuring Methods 0.000 claims abstract description 16
- 238000011049 filling Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 8
- 230000008602 contraction Effects 0.000 abstract description 2
- 238000003756 stirring Methods 0.000 description 26
- 239000003795 chemical substances by application Substances 0.000 description 10
- 239000003085 diluting agent Substances 0.000 description 10
- 238000002156 mixing Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 6
- 239000010881 fly ash Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000005056 compaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000010438 granite Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000004506 ultrasonic cleaning Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
- B29C67/242—Moulding mineral aggregates bonded with resin, e.g. resin concrete
- B29C67/243—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length
- B29C67/244—Moulding mineral aggregates bonded with resin, e.g. resin concrete for making articles of definite length by vibrating the composition before or during moulding
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses an ultrasonic vibration defoaming device and process for a resin mineral composite material, and relates to the field of composite material manufacturing, wherein the ultrasonic vibration defoaming device comprises a support frame, wherein a low-frequency vibration table is arranged in the support frame, and a mold for filling a mixed material is fixed on the low-frequency vibration table; an ultrasonic generator is arranged above the die, the bottom of the ultrasonic generator is connected with a plurality of ultrasonic vibration rods, and the top of the ultrasonic generator is connected with a rotating mechanism and a three-axis moving device. The invention adopts the ultrasonic vibrating rod to accelerate the discharge of gas, reduces the porosity of the sample piece, adopts the post-curing process of variable temperature and pressure, reduces the pores, internal stress and the like of the sample piece caused by expansion with heat and contraction with cold, and improves the performance of the resin-mineral composite material.
Description
Technical Field
The invention relates to the field of composite material manufacturing, in particular to an ultrasonic vibration defoaming device and process for a resin-mineral composite material.
Background
The resin-mineral composite material takes granite particles as aggregate and organic resin as binder, has the advantages of complex appearance forming capability, excellent damping and vibration damping performance, corrosion resistance, wear resistance, low thermal expansion coefficient and the like, does not need sintering in the production process, and has low energy consumption and no pollution to the environment. The resin-mineral composite material needs to fully stir and uniformly mix all components, air is inevitably mixed in the stirring process, if the air cannot be discharged, pores can be formed after the composite material is cured, and the compressive strength, the bending strength and the elastic modulus of the resin-mineral composite material can be reduced. Meanwhile, as the curing of the resin mineral composite material is an exothermic reaction, the volume of tiny air holes in the material expands, and the air holes are aggregated to form larger pores, which seriously influences the performance of the resin mineral composite material.
The prior art discloses a fire fighting equipment is used in water based paint production stirs coating through the motor drive stirring leaf, and meanwhile, carries out slow heating to coating through the interbedded heating pipe of agitator, and supersonic generator vibrates coating through the vibrting spear, and the combined use of defoaming agent, stirring, ultrasonic wave and heating is more ideal to the defoaming effect of coating. Although the scheme discloses a mode of defoaming by combining ultrasonic vibration with other modes, the resin-mineral composite material has high viscosity due to the fact that the aggregate is contained, a stirring rod cannot be fully stirred or stirred, a special stirring barrel is required, and gas is introduced after stirring; in addition, the vibrating rod cannot vibrate all materials in the mold, and the resin-mineral composite material is high in viscosity and poor in flowability, so that gas cannot be fully exhausted; in addition, a low-frequency vibration table is required for vibration compaction aiming at the resin mineral composite material, but the scheme cannot be completed; the scheme has no vacuum defoaming process, and the defoaming effect on the resin mineral composite material is not ideal; the scheme can not eliminate the pores and internal stress generated by material curing under pressure. This approach is therefore not suitable for resin mineral composites.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an ultrasonic vibration defoaming device and process for a resin-mineral composite material, wherein an ultrasonic vibration rod is adopted to accelerate the discharge of gas and reduce the porosity of a sample piece, and a post-curing process with variable temperature and pressure is adopted to reduce pores, internal stress and the like generated by expansion with heat and contraction with cold of the sample piece and improve the performance of the resin-mineral composite material.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the invention provides an ultrasonic vibration defoaming device for a resin-mineral composite material, which comprises a support frame, wherein a low-frequency vibration table is arranged in the support frame, and a mold for filling a mixed material is fixed on the low-frequency vibration table; an ultrasonic generator is arranged above the die, the bottom of the ultrasonic generator is connected with a plurality of ultrasonic vibration rods, and the top of the ultrasonic generator is connected with a rotating mechanism and a three-axis moving device.
As a further implementation manner, the ultrasonic vibration rods are arranged in a plurality of rows and a plurality of columns; the ultrasonic vibration rod rotates within 0-90 degrees along with the ultrasonic generator.
As a further implementation, the ultrasonic vibration rod has a tapered structure.
As a further implementation manner, the three-axis moving device comprises a Z-axis lifting device, a Y-axis moving device and an X-axis moving device which are sequentially arranged from top to bottom, and the rotating mechanism is installed on the X-axis moving device.
As a further implementation manner, the Z-axis lifting device, the Y-axis moving device and the X-axis moving device respectively adopt a lead screw nut mechanism.
As a further implementation, the rotating mechanism employs an angle motor.
In a second aspect, an embodiment of the present invention further provides a defoaming process for a resin-mineral composite material, where the defoaming apparatus is adopted, and the defoaming process includes:
adding the uniformly mixed component materials into a mould, and carrying out vacuum defoaming treatment;
fixing the die on a low-frequency vibration table after vacuum defoaming treatment, vibrating the low-frequency vibration table to be compact, and simultaneously inserting an ultrasonic vibration rod into the material of the die to perform ultrasonic vibration;
after the ultrasonic vibration rod vibrates for a set time, the ultrasonic vibration rod is lifted above the die, the ultrasonic vibration rod is moved and rotated through the three-axis moving device and the rotating mechanism, and the ultrasonic vibration rod is inserted into the material of the die again and vibrates together with the low-frequency vibration table;
performing vacuum defoaming treatment on the vibrated compact material again, and curing and molding the material subjected to the vacuum defoaming treatment;
and demolding the molded and cured material, and performing post-curing treatment on the demolded material to obtain the resin-mineral composite material.
As a further implementation mode, the vibration frequency of the low-frequency vibration table is 20-100 Hz, and the vibration time is 0-60 min.
In a further implementation mode, the vacuum degree of the vacuum defoaming treatment is 20-100 KPa, and the treatment time is 0-30 min.
As a further implementation mode, the treatment temperature of the post-curing treatment is 30-180 ℃, the pressure is 0-1 MPa, and the treatment time is 1-24 h.
The invention has the following beneficial effects:
(1) The invention can accelerate the discharge of the mixed gas during mixing and stirring by the low-frequency vibration table, the ultrasonic generator and the ultrasonic vibration rod, reduce the porosity of the resin-mineral composite material and improve the mechanical property of the resin-mineral composite material.
(2) According to the invention, through the X-axis moving device, the Y-axis moving device, the Z-axis lifting device and the rotating mechanism, the material in the die can be automatically and fully vibrated by the ultrasonic vibrating rod without dead angles, the uniformity of the material is improved, and the mechanical property of the material is improved.
(3) The invention optimizes the manufacturing process of the resin mineral composite material, adopts two times of vacuum defoaming treatment before and after vibration compaction, further reduces the porosity, reduces the pores and internal stress in the material, increases the uniformity of the material and improves the mechanical property of the material.
(4) The invention adopts a pressure curing process, after the second vacuum defoaming treatment is finished, the temperature of 30 ℃ and the pressure of 0-1 MPa are in a pressure container, the shrinkage gap and the internal stress generated by curing heat release are further eliminated, the defects and the stress generated in the material curing process are reduced, and the mechanical property of the material is improved; the post-curing is accelerated by adopting a variable-temperature variable-pressure post-curing treatment process and the temperature of 30-180 ℃, internal stress is further released, the mechanical property of the material is improved, the curing time is shortened, the pressure is kept at 0-1 MPa, the post-curing is continued, the internal gap and the internal stress of the material are reduced, and the mechanical property of the material is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a perspective view of the present invention according to one or more embodiments;
FIG. 2 is a front view of the present invention in accordance with one or more embodiments;
FIG. 3 is a left side view of the present invention according to one or more embodiments;
FIG. 4 is a right side view of the present invention according to one or more embodiments;
FIG. 5 is a top view of the present disclosure according to one or more embodiments;
FIG. 6 (a) is a front view of an ultrasonic vibration device in accordance with one or more embodiments of the invention;
FIG. 6 (b) is a left side view of an ultrasonic vibration device in accordance with one or more embodiments of the present invention;
wherein, 1, a support frame; 2. a low frequency vibration table; 3. a mold; 4. an ultrasonic vibration rod; 5. an ultrasonic generator; 6. an X-axis sliding platform; 7. an angle motor; 8. an X-axis motor; 9. a Y-axis slide table; 10. a Y-axis motor; 11. a Z-axis lifting platform; 12. a Z-axis slide rail; 13. a Z-axis lead screw; 14. a Z-axis motor; 15. a Y-axis lead screw; 16. a Y-axis nut; 17. a Y-axis supporting seat; 18. a Y-axis slide rail; 19. a Y-axis slider; 20. an X-axis nut; 21. an X-axis lead screw; 22. an X-axis slider; 23. an X-axis slide rail; 24. x axle supporting seat.
Detailed Description
The first embodiment is as follows:
the embodiment provides an ultrasonic vibration defoaming device for a resin mineral composite material, which comprises a support frame 1, a low-frequency vibration table 2, an ultrasonic vibration device, a rotating mechanism and a three-axis moving device, wherein the support frame 1 is used for supporting the ultrasonic vibration device, the rotating mechanism and the three-axis moving device; the low-frequency vibration table 2 corresponds to the lower part of the ultrasonic vibration device, and a mold 3 for filling the mixed material is arranged on the low-frequency vibration table 2.
The support frame 1 is of a frame structure, the three-axis moving device is installed at the top of the support frame 1, the ultrasonic vibration device is connected with the three-axis moving device through the rotating mechanism, and the position of the ultrasonic vibration device is adjusted through the three-axis moving device and the rotating mechanism.
Specifically, the ultrasonic vibration device includes an ultrasonic generator 5 and an ultrasonic vibration rod 4, as shown in fig. 6 (a) and 6 (b), the ultrasonic vibration rod 4 is installed at the bottom of the ultrasonic generator 5, and the ultrasonic vibration generated by the ultrasonic generator 5 is transmitted to the ultrasonic vibration rod 4, so that the ultrasonic vibration is generated in the composite material, the rapid discharge of the gas in the material is accelerated, and the performance of the resin-mineral composite material is improved.
In the present embodiment, the ultrasonic vibration rods 4 are arranged in a plurality of rows and columns to sufficiently vibrate the composite material in the mold 3. For example: the ultrasonic vibration rods 4 are arranged in two rows, and a plurality of ultrasonic vibration rods are arranged at intervals in each row.
In order to facilitate insertion of the ultrasonic vibrator rod 4 into the composite material, the ultrasonic vibrator rod 4 of the present embodiment has a tapered structure.
The top of the ultrasonic generator 5 is connected with the rotating mechanism, and the ultrasonic generator 5 and the ultrasonic vibrating rod 4 are driven to rotate in a certain range through the rotating mechanism. Preferably, the ultrasonic vibration rod 4 rotates within 0 to 90 ° and vibrates the composite material at an arbitrary position in cooperation with the three-axis moving device, thereby sufficiently promoting the discharge of the gas inside the material.
In the present embodiment, the rotation mechanism employs an angle motor 7; of course, in other embodiments, the rotary mechanism may employ other sources of rotary power.
As shown in fig. 1-4, the three-axis moving device includes a Z-axis lifting device, a Y-axis moving device, and an X-axis moving device, which are sequentially arranged from top to bottom, and in this embodiment, the Z-axis lifting device, the Y-axis moving device, and the X-axis moving device respectively employ a lead screw and nut mechanism; it is understood that in other embodiments, other linear motion mechanisms may be employed for each of the moving devices.
Furthermore, the Z-axis lifting device comprises a Z-axis lifting platform 11, a Z-axis slide rail 12, a Z-axis motor 14 and a Z-axis lead screw 13, wherein the Z-axis lifting platform 11 is connected with the Z-axis slide rail 12 in a sliding mode, and the Z-axis motor 14 drives the Z-axis lead screw 13 to rotate. Z axle slide rail 12 is fixed in 1 inboards of support frame, and the symmetry sets up two Z axle slide rails 12, and 1 top of support frame corresponds with Z axle lead screw 13 and is provided with the screw hole, and the cooperation forms the screw-nut structure, realizes Z axle elevating gear up-and-down motion to drive ultrasonic vibration device up-and-down motion.
The Y-axis moving device comprises a Y-axis sliding platform 9, a Y-axis support base 27, a Y-axis sliding rail 18, a Y-axis sliding block 19, a Y-axis motor 10, a Y-axis lead screw 15 and a Y-axis nut 16, wherein the Y-axis sliding platform 9 is connected with the Y-axis sliding rail 18 in a sliding mode through the Y-axis sliding block 19, the Y-axis motor 10 drives the Y-axis lead screw 15 to rotate so that the Y-axis sliding platform 9 moves along the Y-axis sliding rail 18, and the lead screw nut realizes that rotary motion is converted into linear motion.
The Y-axis supporting seat 17 is fixed at the bottom of the Z-axis lifting platform 11 and used for supporting the Y-axis sliding rail 18, and at least two groups of Y-axis supporting seats 17 are arranged. In the present embodiment, two sets of two Y-axis holders 17 are provided at intervals, two for each set; of course, in other embodiments, the number of the supporting seats 17 can be adjusted adaptively.
The Y-axis sliding block 19 is fixed at the upper part of the Y-axis sliding platform 9 and is matched with the Y-axis sliding rail 18; in order to maintain the stability of the device, two Y-axis slide rails 18 are provided, a plurality of Y-axis slide blocks 19 are arranged on each Y-axis slide rail 18, and the Y-axis slide blocks 19 can move along the Y-axis slide rails 18.
The Y-axis motor 10 is fixed at the bottom of the Z-axis lifting platform 11 and provides rotary power for the Y-axis lead screw 15, and the Y-axis nut 16 is fixed at the upper part of the Y-axis sliding platform 9 and is in threaded connection with the Y-axis lead screw 15, so that the conversion of rotary motion into linear motion is realized, and the ultrasonic vibration device is driven to reciprocate linearly along the Y axis.
The X-axis moving device comprises an X-axis sliding platform 6, an X-axis support base 24, an X-axis sliding rail 23, an X-axis sliding block 22, an X-axis motor 8, an X-axis lead screw 21 and an X-axis nut 20, wherein the X-axis sliding platform 6 is connected with the X-axis sliding rail 23 in a sliding mode through the X-axis sliding block 22, and the X-axis motor 8 drives the X-axis lead screw 21 to rotate so that the X-axis sliding platform 6 moves along the X-axis sliding rail 23.
The X-axis moving device realizes that rotary motion is converted into linear motion by a screw nut, and an X-axis support seat 24 is fixed at the bottom of the Y-axis sliding platform 6 and used for supporting an X-axis sliding rail 23; the X-axis slide block 22 is fixed on the upper part of the X-axis slide platform 6 and moves along the X-axis slide rail. The X-axis motor 8 is fixed at the bottom of the Y-axis sliding platform 9 and provides rotating power for the X-axis lead screw 21, and the X-axis nut 20 is fixed at the upper part of the X-axis sliding platform 6 to convert rotating motion into linear motion, so that the ultrasonic vibration device is driven to reciprocate linearly along the X axis.
The mould 3 of this embodiment is fixed in 2 upper portions of low frequency shaking table, and low frequency shaking table 2 produces low frequency vibration, vibrates resin mineral composite closely knit, uses ultrasonic vibration device to insert in the mould resin mineral composite at the closely knit in-process of vibration, adopts ultrasonic vibration to accelerate gas outgoing, forms closely knit, the hole is few, the resin mineral composite sample spare that the defect is few.
In the resin mineral composite material forming process, the ultrasonic vibration rod 4 is matched with the low-frequency vibration table 2 to accelerate the discharge of gas, so that the porosity of a sample piece is reduced, the pores and the internal stress in the material are reduced, the uniformity of the material is increased, and the mechanical property of the material is improved.
In the embodiment, the material in the die is automatically and fully vibrated by the ultrasonic vibrating rod through the X-axis moving device, the Y-axis moving device, the Z-axis lifting device and the angle motor 7, no dead angle is left, the uniformity of the material is improved, and the mechanical property of the material is improved.
Example two:
the resin mineral composite material is prepared by uniformly mixing and stirring natural ore particles, organic resin, a curing agent and a diluent, pouring into a mold, placing the mold on a low-frequency vibrating table for vibration compaction, and finally curing at room temperature. Air is inevitably mixed in the stirring process, and if the air cannot be exhausted in time, pores are formed in the resin-mineral composite material, so that the performance of the resin-mineral composite material is affected.
The resin mineral composite curing process is the exothermal process, because expend with heat and contract with cold principle, the gas pocket is heated the expansion and is polymerized, forms great hole, and the sample also can produce shrink clearance and internal stress, for solving above-mentioned problem, the resin mineral composite process optimization is carried out to this embodiment, provides a resin mineral composite defoaming technology, further promotes resin mineral composite's performance.
Specifically, the defoaming device in the first embodiment includes the following steps:
pouring the material with all the components uniformly stirred and mixed into a mold 3, and then putting the mold 3 into vacuum equipment for vacuum defoaming treatment.
The material that will carry out the defoaming processing is fixed on low frequency vibration platform 2, and low frequency vibration platform 2 vibrates to vibrate closely knit, and simultaneously, ultrasonic vibration carries out ultrasonic vibration in the material of ultrasonic vibration stick 4 insertion mould 3, and gas outgoing accelerates, further promotes the vibration closely knit.
And (4) putting the material subjected to vibration compaction into vacuum equipment, and performing vacuum defoaming treatment again. And (4) putting the material subjected to vacuum defoaming treatment into a pressure container, and curing and molding. And demolding the cured and molded material, and continuously putting the demolded sample piece into a pressure container for temperature and pressure change and post-curing treatment to obtain the prepared resin mineral composite sample piece.
In the embodiment, the vacuum degree of the vacuum defoaming treatment is 20-100 KPa, and the treatment time is 0-30 min; the vibration frequency of the low-frequency vibration table 2 is 20-100 Hz, and the vibration time is 0-60 min; the rotation angle of the angle motor 7 is 0-90 degrees; the temperature for curing and molding the pressure container is 20-50 ℃, the pressure is 0-1 MPa, and the curing time is 24-120 h. The post-curing treatment temperature is 30-180 ℃, the pressure is 0-1 MPa, and the treatment time is 1-24 h.
This embodiment adopts vibration twice vacuum defoaming processing around closely knit, further reduces the inside gas pocket of material, improves material mechanical properties. By adopting a pressure curing process, after the second vacuum defoaming treatment is finished, the temperature of 30 ℃ and the pressure of 0-1 MPa in a pressure container are further eliminated, shrinkage gaps and internal stress generated by curing heat release are further eliminated, defects and stress generated in the material curing process are reduced, and the mechanical property of the material is improved.
The post-curing is accelerated by adopting a variable-temperature variable-pressure post-curing treatment process at the temperature of 30-180 ℃, internal stress is further released, the mechanical property of the material is improved, the curing time is shortened, the pressure is kept at 0-1 MPa, the post-curing is continued, the internal gap and the internal stress of the material are reduced, and the mechanical property of the material is improved.
Comparative example:
the resin-mineral composite material comprises aggregate, organic resin, a curing agent and a diluent.
Aggregate: 6800g of natural granite particles, wherein,
0.1-0.3 mm:816g, the mass fraction accounts for 12%;
0.3-1.2 mm:1020g, the mass fraction accounts for 15%;
1.2-2.4 mm:952g, the mass fraction accounts for 14%;
2.4-4.8 mm:1496g, the mass fraction accounts for 22%;
4.8-10 mm:2516g, the mass fraction accounts for 37%;
fly ash: 3340g, the mass fraction accounts for 5%.
800g of resin matrix comprising: 600g of epoxy resin, 160g of curing agent and 40g of diluent.
The manufacturing process of the resin mineral composite material comprises the following steps: (1) Carrying out ultrasonic cleaning and drying on the aggregate, and screening for later use according to the classification; (2) Mixing epoxy resin, a curing agent and a diluent, adding into a stirring barrel, and stirring for 5min to prepare a resin system; (3) adding the fly ash into a resin system, and stirring for 3min; (4) Mixing the resin matrix and the aggregate obtained in the last step, adding the mixture into a stirring barrel, stirring for 30min, and pouring the obtained mixture into a mold; (5) Fixing the mold on a low-frequency vibration table, and vibrating for compacting for 30min; and (6) curing and forming at room temperature.
Example three:
the resin mineral composite material comprises aggregate, organic resin, curing agent and diluent.
Aggregate: 6800g of natural granite particles, wherein,
0.1-0.3 mm:816g, the mass fraction accounts for 12%;
0.3-1.2 mm:1020g, the mass fraction accounts for 15%;
1.2-2.4 mm:952g, the mass fraction accounts for 14%;
2.4-4.8 mm:1496g, the mass fraction accounts for 22%;
4.8-10 mm:2516g, wherein the mass fraction accounts for 37%;
fly ash: 3340g, the mass fraction accounts for 5%.
800g of a resin matrix comprising: 600g of epoxy resin, 160g of curing agent and 40g of diluent.
The manufacturing process of the resin mineral composite material comprises the following steps: (1) Carrying out ultrasonic cleaning and drying on the aggregate, and screening the aggregate for later use according to the classification; (2) Mixing epoxy resin, a curing agent and a diluent, adding into a stirring barrel, and stirring for 5min to prepare a resin system; (3) adding the fly ash into a resin system, and stirring for 3min; (4) Mixing the resin matrix and the aggregate obtained in the last step, adding the mixture into a stirring barrel, stirring for 30min, and pouring the obtained mixture into a mold; (5) Putting the mould into vacuum equipment, and performing vacuum defoaming treatment for 5min at a vacuum degree of 50 KPa; (6) Fixing the die on a low-frequency vibration table, vibrating and compacting for 30min, and fully vibrating the material in the die by adopting an ultrasonic vibration defoaming device in the vibrating and compacting process; (7) Putting the mould into vacuum equipment again, and performing vacuum defoaming treatment for 5min at a vacuum degree of 50 KPa; (8) Placing the die into a pressure container, and curing and molding at 30 ℃ and 0.3MPa; (9) demolding; (10) And putting the demoulded sample piece into the pressure container again, and carrying out high-temperature pressure post-curing treatment at the temperature of 30-100 ℃ under the pressure of 0.5MPa for 5h.
Example four:
the resin mineral composite material comprises aggregate, organic resin, curing agent and diluent.
Aggregate: 6800g of natural granite particles, wherein,
0.1-0.3 mm:816g, the mass fraction accounts for 12%;
0.3-1.2 mm:1020g, the mass fraction accounts for 15%;
1.2-2.4 mm:952g, the mass fraction accounts for 14%;
2.4-4.8 mm:1496g, the mass fraction accounts for 22%;
4.8-10 mm:2516g, wherein the mass fraction accounts for 37%;
fly ash: 3340g, the mass fraction accounts for 5%.
800g of a resin matrix comprising: 600g of epoxy resin, 160g of curing agent and 40g of diluent.
The manufacturing process of the resin mineral composite material comprises the following steps: (1) Carrying out ultrasonic cleaning and drying on the aggregate, and screening the aggregate for later use according to the classification; (2) Mixing epoxy resin, a curing agent and a diluent, adding into a stirring barrel, and stirring for 5min to prepare a resin system; (3) adding the fly ash into a resin system, and stirring for 3min; (4) Mixing the resin matrix and the aggregate obtained in the last step, adding the mixture into a stirring barrel, stirring for 30min, and pouring the obtained mixture into a mold; (5) Putting the mould into vacuum equipment, and carrying out vacuum defoaming treatment, wherein the vacuum degree is 80KPa, and the time is 5min; (6) Fixing the die on a low-frequency vibration table, and vibrating for 30min, wherein an ultrasonic vibration defoaming device is adopted to fully vibrate the material in the die in the vibration compacting process; (7) Putting the mould into vacuum equipment again, and carrying out vacuum defoaming treatment, wherein the vacuum degree is 80KPa, and the time is 5min; (8) Placing the die into a pressure container, and curing and molding at 30 ℃ and 0.5MPa; (9) demolding; (10) And (3) putting the demoulded sample piece into the pressure container again, and carrying out high-temperature pressure post-curing treatment at the temperature of 100-180 ℃ under the pressure of 0.8MPa for 8 hours.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The ultrasonic vibration defoaming device for the resin mineral composite material is characterized by comprising a support frame, wherein a low-frequency vibration table is arranged in the support frame, and a mold for filling a mixed material is fixed on the low-frequency vibration table; an ultrasonic generator is arranged above the die, the bottom of the ultrasonic generator is connected with a plurality of ultrasonic vibration rods, and the top of the ultrasonic generator is connected with a rotating mechanism and a three-axis moving device.
2. The ultrasonic vibration defoaming device for resin mineral composite material as claimed in claim 1, wherein the ultrasonic vibration rods are arranged in a plurality of rows and a plurality of columns; the ultrasonic vibration rod rotates within 0-90 degrees along with the ultrasonic generator.
3. The ultrasonic vibration defoaming device for resin mineral composite material as claimed in claim 2, wherein the ultrasonic vibration rod is in a conical structure.
4. The ultrasonic vibration defoaming device for resin mineral composite as claimed in claim 1, wherein the three-axis moving device comprises a Z-axis lifting device, a Y-axis moving device and an X-axis moving device which are arranged in sequence from top to bottom, and the rotating mechanism is mounted on the X-axis moving device.
5. The ultrasonic vibration defoaming device for resin mineral composite material as claimed in claim 4, wherein the Z-axis lifting device, the Y-axis moving device and the X-axis moving device respectively adopt a lead screw and nut mechanism.
6. The ultrasonic vibration defoaming device for resin mineral composite as claimed in claim 1, wherein the rotating mechanism is an angle motor.
7. A defoaming process for resin mineral composite material, characterized in that the defoaming device according to any one of claims 1 to 6 is adopted, and comprises the following steps:
adding the uniformly mixed component materials into a mold, and performing vacuum defoaming treatment;
fixing the die on a low-frequency vibration table after vacuum defoaming treatment, vibrating the low-frequency vibration table to be compact, and simultaneously inserting an ultrasonic vibration rod into the material of the die to perform ultrasonic vibration;
after the ultrasonic vibration rod vibrates for a set time, the ultrasonic vibration rod is lifted above the die, the ultrasonic vibration rod is moved and rotated through the three-axis moving device and the rotating mechanism, and the ultrasonic vibration rod is inserted into the material of the die again and vibrates together with the low-frequency vibration table;
performing vacuum defoaming treatment on the vibrated compact material again, and curing and molding the material subjected to the vacuum defoaming treatment;
and (3) demolding the molded and cured material, and performing post-curing treatment on the demolded material to obtain the resin-mineral composite material.
8. The defoaming process of resin mineral composite according to claim 7, characterized in that the vibration frequency of the low-frequency vibration table is 20 to 100Hz, and the vibration time is 0 to 60min.
9. The defoaming process of resin mineral composite material according to claim 7, characterized in that the vacuum degree of the vacuum defoaming treatment is 20-100 KPa, and the treatment time is 0-30 min.
10. The defoaming process of resin-mineral composite material as claimed in claim 7, wherein the post-curing treatment temperature is 30-180 ℃, the pressure is 0-1 MPa, and the treatment time is 1-24 h.
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| CN202210816678.1A CN115157706A (en) | 2022-07-12 | 2022-07-12 | Resin mineral composite material ultrasonic vibration defoaming device and process |
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| CN202210816678.1A CN115157706A (en) | 2022-07-12 | 2022-07-12 | Resin mineral composite material ultrasonic vibration defoaming device and process |
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