CN116766433A - SA composite room temperature vulcanized silicone rubber preparation equipment and preparation process thereof - Google Patents
SA composite room temperature vulcanized silicone rubber preparation equipment and preparation process thereof Download PDFInfo
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- CN116766433A CN116766433A CN202310817223.6A CN202310817223A CN116766433A CN 116766433 A CN116766433 A CN 116766433A CN 202310817223 A CN202310817223 A CN 202310817223A CN 116766433 A CN116766433 A CN 116766433A
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- silicone rubber
- vulcanized silicone
- stirring rod
- rod
- fixedly connected
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 76
- 239000004945 silicone rubber Substances 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 89
- 238000003825 pressing Methods 0.000 claims description 15
- 241000209094 Oryza Species 0.000 claims description 12
- 235000007164 Oryza sativa Nutrition 0.000 claims description 12
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 claims description 12
- 235000009566 rice Nutrition 0.000 claims description 12
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000000017 hydrogel Substances 0.000 claims description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 6
- 239000005051 trimethylchlorosilane Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000000499 gel Substances 0.000 claims description 5
- 239000004964 aerogel Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000000944 Soxhlet extraction Methods 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 230000005661 hydrophobic surface Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims 1
- 238000001354 calcination Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000007872 degassing Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 238000010092 rubber production Methods 0.000 claims 1
- 238000012216 screening Methods 0.000 claims 1
- 239000000741 silica gel Substances 0.000 claims 1
- 229910002027 silica gel Inorganic materials 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 239000006185 dispersion Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
- 239000004965 Silica aerogel Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/06—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices
- B29B7/10—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary
- B29B7/18—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type with movable mixing or kneading devices rotary with more than one shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The application relates to the technical field of preparation of vulcanized silicone rubber, and discloses SA composite room temperature vulcanized silicone rubber preparation equipment which mainly comprises a base, an upright post, a charging barrel, a transverse plate, a motor, a main shaft, a stirring rod, a secondary shaft and the like. According to the application, the stirring rod is driven to rotate by the rotation of the main shaft, so that the stirring rod is used for stirring the vulcanized silicone rubber in a molten state, and the distance between the stirring rod and the arc plate is gradually reduced by the action of the arc plate and through the rotation of the stirring rod, so that the vulcanized silicone rubber on the stirring rod is extruded by the stirring rod and the arc plate, and air bubbles are accelerated to be discharged from the molten vulcanized silicone rubber, and the exhaust effect of the vulcanized silicone rubber is improved.
Description
Technical Field
The application relates to the technical field of preparation of vulcanized silicone rubber, in particular to SA composite room temperature vulcanized silicone rubber preparation equipment and a preparation process thereof.
Background
The vulcanized silicone rubber is a novel organic silicon elastomer, is used for manufacturing dealcoholized, deacidified, bi-component sealing and the like, has very good demolding property, can be cured without heating and pressurizing at room temperature, is particularly suitable for manufacturing a precise mold, needs to be subjected to dispersion treatment in the production process, is an essential device in a dispersion step, is a stirrer, and has very strong turbulence and strong dispersion and emulsification effects on materials in part by adopting a high-speed stirrer.
When the existing dispersing machine is used for dispersing the vulcanized silicone rubber, due to the adhesiveness of the vulcanized silicone rubber, gas is difficult to be discharged from the vulcanized silicone rubber in a molten state rapidly, the processing efficiency of equipment is affected, and secondly, the vulcanized silicone rubber at the bottom of the stirring rod can only be brought into a stirring area through the viscosity of the rubber, so that the dispersing efficiency can only be improved by lengthening the dispersing time, the phenomenon that the vulcanized silicone rubber is dispersed unevenly is easy to occur, and the dispersing effect of the equipment is poor.
Disclosure of Invention
The application provides SA composite room temperature vulcanized silicone rubber preparation equipment and a preparation process thereof, which have the advantages of rapidly discharging bubbles in vulcanized silicone rubber, increasing dispersion efficiency, accelerating the vulcanized silicone rubber at the lower side of a stirring rod to enter a stirring area and improving dispersion effect, and are used for solving the problems in the prior art.
In order to achieve the above purpose, the application adopts the following technical scheme: an SA composite room temperature vulcanized silicone rubber preparation apparatus comprising:
the base is used for placing the dispersing machine;
the upright posts are fixedly connected to the left side and the right side of the top surface of the base;
the charging barrel is placed on the top surface of the base and is used for containing the vulcanized silicone rubber in a molten state, and arc plates are uniformly and equidistantly fixedly connected to the side wall of the inner cavity of the charging barrel;
the transverse plate is connected to the top surface of the upright post through a telescopic rod, a motor is fixedly connected to the middle of the top surface of the transverse plate, a main shaft is fixedly connected to an output shaft of the motor, a stirring rod is fixedly connected to the outer surface of the lower part of the main shaft, and a countershaft is connected to the motor inside the transverse plate through gear transmission;
the deflector rod is fixedly connected to the middle part of the bottom surface of the auxiliary shaft, and synchronous rotation of the deflector rod and the auxiliary shaft is ensured.
Further, the stirring rod comprises:
the through groove is formed in the middle of the cross rod at the bottom of the stirring rod, so that the vulcanized silicone rubber at the lower side of the stirring rod can conveniently enter the stirring area;
the elastic strip is fixedly connected to the lower part of the side surface of the stirring rod, which is close to one side of the main shaft, and one end of the elastic strip, which is far away from the stirring rod, is fixedly connected to the outer surface of the main shaft.
Further, the elastic strip comprises:
the pull rod is fixedly connected to the middle of the bottom surface of the elastic strip, the lower part of the pull rod penetrates through the through groove and is arranged on the lower side of the stirring rod, and the bottom end of the pull rod is fixedly connected with a pressing plate for extruding and pulling the vulcanized silicone rubber.
Further, the bottom of the deflector rod is positioned at the lower side of the bottom surface of the elastic strip, and the deflector rod is positioned on the rotating track of the elastic strip.
Further, the stirring rod further comprises:
the chute is arranged in the stirring rod, the chute penetrates through the bottom surface of the stirring rod, through holes are symmetrically arranged in the stirring rod and are formed in the top of the chute, and the through holes are communicated with the chute and a cavity in the outer side of the stirring rod.
Further, the deflector rod comprises:
the reciprocating screw thread is fixedly arranged on the outer surface of the deflector rod, the outer surface of the deflector rod is positioned at the reciprocating screw thread and is in sliding sleeve joint with the sliding plate, and the middle part of the sliding plate is in sliding sleeve joint with the stirring rod.
Further, the slide plate comprises:
the connecting rope is fixedly connected to the top surfaces of the two sides of the stirring rod of the sliding plate.
Referring to the figure-drawing, the connecting rope sequentially passes through the through hole and the chute to be fixedly connected to the middle part of the bottom surface of the pressing plate.
A preparation process of SA composite room temperature vulcanized silicone rubber comprises the following steps:
in the first step, the rice hulls are calcined at 700 ℃ to obtain white rice hull ash containing 95-98% amorphous silica, the rice hull ash is converted to a sodium silicate solution, and the rice hull ash is boiled with 2.1 moles of sodium hydroxide for 24 hours.
In the second step, the sodium silicate solution is filtered in vacuo and the ionized water is diluted to 0.7 mole. The gel hydrogel beads with the diameter of 1-3mm are prepared by adopting an acid-base sol method, and the sodium silicate solution is subjected to gel polymerization in an oil ammonia solution.
Thirdly, exchanging the hydrogel with a solvent, adopting an absolute ethyl alcohol Soxhlet extraction method and n-hexane solution surface extraction, modifying by 20% Trimethylchlorosilane (TMCS) to obtain a hydrophobic surface, finally obtaining aerogel particles, drying by an environmental pressure, and further sieving at 120 ℃ in an oven to obtain the particle size of 0.5 mm.
Fourth, a known weight of room temperature cured silicone rubber was mechanically stirred to incorporate 9% silica aerogel (400 rpm) and mixed for no more than 10 minutes.
Fifth, the substrate is coated to a thickness of 5.0mm and then degassed under vacuum to be cured (surface drying time typically less than 30 minutes).
The application has the following beneficial effects:
according to the SA composite room temperature vulcanized silicone rubber preparation equipment provided by the application, the stirring rod is driven to rotate by the rotation of the main shaft through designing the arc plate, so that the stirring rod is used for stirring the vulcanized silicone rubber in a molten state, the distance between the stirring rod and the arc plate is gradually reduced by the action of the arc plate and the rotation of the stirring rod, the vulcanized silicone rubber on the stirring rod is extruded by the stirring rod and the arc plate, and therefore, the discharge of bubbles from the molten vulcanized silicone rubber is accelerated, and the exhaust effect of the vulcanized silicone rubber is improved.
Secondly, through design elastic strip and driving lever, because main shaft and countershaft are independent rotation for can drive the elastic strip and rotate when the puddler rotates, and the driving lever of countershaft bottom is in the rotation orbit of elastic strip, makes the elastic strip can receive the stirring of driving lever at the rotation in-process, thereby impels the elastic strip to take place to make a round trip to rock by self elasticity effect, thereby accelerates the discharge of melting vulcanized silicone rubber bottom bubble.
Simultaneously, through the design of pull rod and clamp plate for the elastic strip can drive the pull rod and shift up when receiving the driving lever and stir, causes the pull rod to drive the clamp plate and shift up, thereby utilizes the upward movement of clamp plate to promote the vulcanized silicone rubber of puddler bottom to be driven upward to move, and pass through logical groove entering stirring area, make the vulcanized silicone rubber of puddler bottom can also receive ascending holding in the palm the power under the circumstances that receives self viscidity, thereby promote the vulcanized silicone rubber of puddler bottom can be quick get into stirring area, improved the dispersion effect and the dispersion degree of dispenser.
Secondly, through designing spout, the through-hole, reciprocal screw thread, slide and connecting rope, utilize the rotation of countershaft to drive the driving lever and rotate, make the driving lever utilize reciprocal screw thread to drive the slide and do reciprocating motion about on the surface of main shaft, when the slide moves down, the slide can pull the connecting rope and move down, make the inside connecting rope of spout can move up, thereby pull the clamp plate and move down, can remove to the side of clamp plate after making the vulcanized silicone rubber of puddler bottom pressurized, make the vulcanized silicone rubber of clamp plate side can be taken away by the puddler with the arc cooperation, play the promotion effect to vulcanized silicone rubber's exhaust, simultaneously also improved dispersive efficiency.
Secondly, because the clamp plate can drive elastic strip deformation when receiving connecting rope pulling to move down, and when the slide moved up, the state of connecting rope changed into lax from tight, the elastic strip can receive self elastic effect to reset this moment to utilize the pull rod to drive the clamp plate and move up, make the vulcanized silicone rubber of puddler bottom be brought into in the stirring district, further promoted the improvement of vulcanized silicone rubber dispersion effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
The application may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a schematic view of the internal structure of the cartridge of the present application;
FIG. 3 is a schematic view of a cartridge and arcuate plate according to the present application;
FIG. 4 is a schematic diagram of a countershaft construction of the present application;
FIG. 5 is a schematic diagram of a spindle configuration of the present application;
FIG. 6 is a schematic view of the spindle and sled according to the present application;
FIG. 7 is a schematic view of a skateboard and a lever according to the present application.
Reference numerals: 1. a base; 2. a column; 3. clamping blocks; 4. a charging barrel; 41. an arc-shaped plate; 5. a cross plate; 6. a motor; 7. a main shaft; 8. a stirring rod; 81. a through groove; 82. an elastic strip; 83. a pull rod; 84. a pressing plate; 85. a chute; 86. a through hole; 9. a secondary shaft; 91. a deflector rod; 92. a reciprocating thread; 93. a slide plate; 94. a connecting rope; 10. stirring rod.
Description of the embodiments
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples
Referring to fig. 1 to 5, an SA composite room temperature vulcanized silicone rubber preparation apparatus includes:
and a base 1 for placing a dispersing machine.
The upright post 2 is fixedly arranged on the left side and the right side of the top surface of the base 1, and the side surface of the upright post 2, which is close to the middle part of the base 1, is provided with a clamping block 3 through a telescopic rod.
The charging barrel 4 is placed on the top surface of the base 1, the charging barrel 4 is placed between the two clamping blocks 3 and is used for containing the vulcanized silicone rubber in a molten state, arc plates 41 are uniformly and fixedly installed on the side walls of the inner cavity of the charging barrel 4 at equal intervals, the vulcanized silicone rubber is conveniently extruded, and bubbles inside the vulcanized silicone rubber are caused to be discharged.
The transverse plate 5 is arranged on the top surface of the upright post 2 through a telescopic rod, the motor 6 is fixedly arranged in the middle of the top surface of the transverse plate 5, the main shaft 7 is fixedly arranged on the output shaft of the motor 6, the stirring rod 8 is fixedly arranged on the outer surface of the lower part of the main shaft 7, the motor 6 is positioned in the transverse plate 5 and is connected with the auxiliary shaft 9 through gear transmission, and the stirring rod 10 is fixedly arranged on the outer surface of the lower middle part of the auxiliary shaft 9.
The deflector rod 91 is fixedly arranged in the middle of the bottom surface of the auxiliary shaft 9, so that synchronous rotation of the deflector rod 91 and the auxiliary shaft 9 is ensured.
Referring to fig. 1 to 5, the stirring rod 8 includes:
the through groove 81 is formed in the middle of the cross bar at the bottom of the stirring rod 8, so that the vulcanized silicone rubber at the lower side of the stirring rod 8 can enter a stirring area conveniently, and the dispersion effect of the vulcanized silicone rubber is improved;
the elastic strip 82 is fixedly welded at the lower part of the side surface of the stirring rod 8, which is close to one side of the main shaft 7, and one end of the elastic strip 82, which is far away from the stirring rod 8, is fixedly welded on the outer surface of the main shaft 7, so that the elastic strip 82 is ensured to rotate when driven by the stirring rod 8 and is matched with the deflector 91.
Referring to fig. 1-5, the elastic strip 82 includes:
the pull rod 83 is fixedly welded in the middle of the bottom surface of the elastic strip 82, the lower part of the pull rod 83 penetrates through the through groove 81 and is arranged on the lower side of the stirring rod 8, and the bottom end of the pull rod 83 is fixedly welded with the pressing plate 84 for extruding and pulling the vulcanized silicone rubber, so that the vulcanized silicone rubber enters a stirring area and is dispersed.
Referring to fig. 1-5, the bottom of the lever 91 is located at the lower side of the bottom surface of the elastic strip 82, and the lever 91 is located on the rotating track of the elastic strip 82, so that the elastic strip 82 is conveniently stirred by the lever 91, and the elastic strip 82 is promoted to shake back and forth.
Referring to fig. 1-5, when the device is working normally, the molten vulcanized silicone rubber is put into the charging barrel 4, the motor 6 is started, the motor 6 drives the main shaft 7 and the stirring rod 8 to rotate, meanwhile, the main shaft 7 drives the auxiliary shaft 9 to rotate through gear transmission, the auxiliary shaft 9 drives the stirring rod 10 to rotate, dispersion of the vulcanized silicone rubber is achieved, the stirring rod 8 is matched with the arc 41, the distance between the stirring rod 8 and the arc 41 is gradually reduced when the stirring rod 8 rotates, the vulcanized silicone rubber adhered on the stirring rod 8 is extruded by the arc 41 and the stirring rod 8, and accordingly exhaust of gas inside the vulcanized silicone rubber is accelerated.
Meanwhile, in the process of rotation of the stirring rod 8, the stirring rod 8 is utilized to drive the elastic strip 82 to rotate, and the stirring rod 91 is positioned on the rotating track of the elastic strip 82, so that the elastic strip 82 can be stirred by the stirring rod 91 when rotating to the lower side of the stirring rod 91, and the elastic strip 82 can shake back and forth under the elastic action of the elastic strip, so that the air bubble discharge in the molten vulcanized silicone rubber is further accelerated.
Secondly, through the design of pull rod 83 and clamp plate 84, cause elastic strip 82 when receiving driving lever 91 to stir, can drive pull rod 83 and shift up to pulling clamp plate 84 shifts up, making clamp plate 84 can hold up the vulcanized silicone rubber of puddler 8 downside, make vulcanized silicone rubber of puddler 8 lower part can pass through logical groove 81 and get into the stirring region, and then improve the dispersion effect and the dispersion degree of dispersion machine.
Examples
Referring to fig. 1 to 7, the stirring rod 8 further includes:
chute 85 is offered in the inside of puddler 8, and chute 85 runs through the bottom surface of puddler 8, and through-hole 86 has been offered to the symmetry of the inside of puddler 8 being located the top of chute 85, and through-hole 86 communicates chute 85 with the cavity in the puddler 8 outside.
Referring to fig. 1 to 7, the lever 91 includes:
the reciprocating screw thread 92 is fixedly arranged on the outer surface of the deflector rod 91, the outer surface of the deflector rod 91 is positioned at the position of the reciprocating screw thread 92 and is in sliding sleeve joint with the sliding plate 93, and the middle part of the sliding plate 93 is in sliding sleeve joint with the stirring rod 8, so that the sliding plate 93 can conveniently reciprocate up and down along the outer surface of the main shaft 7.
Referring to fig. 1 to 7, the slide plate 93 includes:
the connecting ropes 94 are fixedly connected to the top surfaces of the sliding plates 93 on two sides of the stirring rod 8.
Referring to fig. 1-7, the connecting rope 94 passes through the through hole 86 and the chute 85 sequentially and is fixedly connected to the middle part of the bottom surface of the pressing plate 84, so that the connecting rope 94 is pulled when the sliding plate 93 moves down.
Referring to fig. 1-7, when the auxiliary shaft 9 drives the stirring rod 10 to rotate, the sliding plate 93 reciprocates up and down along the outer surface of the main shaft 7 by utilizing the cooperation of the reciprocating screw 92 and the sliding plate 93, when the sliding plate 93 moves down, the connecting rope 94 in the chute 85 is driven by the sliding plate 93 to move up, and the bottom end of the connecting rope 94 is connected with the pressing plate 84, so that the connecting rope 94 pulls the pressing plate 84 to move down, the vulcanized silicone rubber at the lower side of the stirring rod 8 is extruded by the pressing plate 84, the vulcanized silicone rubber at the lower side of the stirring rod 8 moves through the side edge of the pressing plate 84, and at the moment, the vulcanized silicone rubber at the side edge of the pressing plate 84 is contacted with the stirring rod 8 as much as possible by the action of the arc plate 41, so that the vulcanized silicone rubber is taken away by the stirring rod 8 and enters the stirring area, and further promotes the exhaust and dispersion of the vulcanized silicone rubber.
Secondly, because the pressing plate 84 can drive the elastic strip 82 to deform when being pulled to move downwards by the connecting rope 94, and when the sliding plate moves upwards, the pressing plate 84 can be driven to move upwards by the pull rod 83 due to the release of potential energy of the elastic strip 82, so that the vulcanized silicone rubber on the lower side of the stirring rod 8 can be driven to move upwards by the pressing plate 84 and enter the stirring area through the through groove 81, and the dispersing effect of the vulcanized silicone rubber is further improved.
A preparation process of SA composite room temperature vulcanized silicone rubber comprises the following steps:
in the first step, the rice hulls are calcined at 700 ℃ to obtain white rice hull ash containing 95-98% amorphous silica, the rice hull ash is converted to a sodium silicate solution, and the rice hull ash is boiled with 2.1 moles of sodium hydroxide for 24 hours.
In the second step, the sodium silicate solution is filtered in vacuo and the ionized water is diluted to 0.7 mole. The gel hydrogel beads with the diameter of 1-3mm are prepared by adopting an acid-base sol method, and the sodium silicate solution is subjected to gel polymerization in an oil ammonia solution.
Thirdly, exchanging the hydrogel with a solvent, adopting an absolute ethyl alcohol Soxhlet extraction method and n-hexane solution surface extraction, modifying by 20% Trimethylchlorosilane (TMCS) to obtain a hydrophobic surface, finally obtaining aerogel particles, drying by an environmental pressure, and further sieving at 120 ℃ in an oven to obtain the particle size of 0.5 mm.
Fourth, a known weight of room temperature cured silicone rubber was mechanically stirred to incorporate 9% silica aerogel (400 rpm) and mixed for no more than 10 minutes.
Fifth, the substrate is coated to a thickness of 5.0mm and then degassed under vacuum to be cured (surface drying time typically less than 30 minutes).
Claims (9)
1. An SA composite room temperature vulcanized silicone rubber preparation apparatus, characterized by comprising:
a base (1) for placing a dispenser;
the upright posts (2) are fixedly connected to the left side and the right side of the top surface of the base (1);
the charging barrel (4) is placed on the top surface of the base (1) and is used for containing the vulcanized silicone rubber in a molten state, and arc plates (41) are uniformly and equidistantly fixedly connected to the side wall of the inner cavity of the charging barrel (4);
the transverse plate (5) is connected to the top surface of the upright post (2) through a telescopic rod, a motor (6) is fixedly connected to the middle of the top surface of the transverse plate (5), a main shaft (7) is fixedly connected to an output shaft of the motor (6), a stirring rod (8) is fixedly connected to the outer surface of the lower portion of the main shaft (7), and a countershaft (9) is connected to the motor (6) inside the transverse plate (5) through gear transmission;
the deflector rod (91) is fixedly connected to the middle part of the bottom surface of the auxiliary shaft (9), so that synchronous rotation of the deflector rod (91) and the auxiliary shaft (9) is ensured.
2. The SA composite room temperature vulcanized silicone rubber preparation apparatus according to claim 1, wherein the stirring rod (8) comprises:
the through groove (81) is formed in the middle of the cross rod at the bottom of the stirring rod (8) so that the vulcanized silicone rubber at the lower side of the stirring rod (8) can conveniently enter the stirring area;
the elastic strip (82) is fixedly connected to the lower part of the side surface of the stirring rod (8) close to one side of the main shaft (7), and one end of the elastic strip (82) away from the stirring rod (8) is fixedly connected to the outer surface of the main shaft (7).
3. The SA composite room temperature vulcanized silicone rubber production apparatus as set forth in claim 2, wherein said elastic strip (82) comprises thereon:
the pull rod (83) is fixedly connected to the middle of the bottom surface of the elastic strip (82), the lower portion of the pull rod (83) penetrates through the through groove (81) and is arranged on the lower side of the stirring rod (8), and a pressing plate (84) is fixedly connected to the bottom end of the pull rod (83) and used for extruding and pulling vulcanized silicone rubber.
4. A SA composite room temperature vulcanized silicone rubber preparation apparatus according to claim 3, wherein the bottom of the deflector rod (91) is located at the lower side of the bottom surface of the elastic strip (82), and the deflector rod (91) is located on the track of rotation of the elastic strip (82).
5. The SA composite room temperature vulcanized silicone rubber preparation apparatus according to claim 4, wherein the stirring rod (8) further comprises:
spout (85) are seted up the inside of puddler (8), and spout (85) run through the bottom surface of puddler (8), through-hole (86) have been seted up to the top symmetry that the inside of puddler (8) is located spout (85), through-hole (86) are with the cavity intercommunication in spout (85) and puddler (8) outside.
6. The SA composite room temperature vulcanized silicone rubber preparation apparatus as defined in claim 5, wherein the shift lever (91) comprises:
the reciprocating screw thread (92) is fixedly arranged on the outer surface of the deflector rod (91), the outer surface of the deflector rod (91) is positioned at the reciprocating screw thread (92) and is in sliding sleeve connection with the sliding plate (93), and the middle part of the sliding plate (93) is in sliding sleeve connection with the stirring rod (8).
7. The SA composite room temperature vulcanized silicone rubber preparation apparatus as defined in claim 6, wherein the slide plate (93) comprises:
the connecting ropes (94) are fixedly connected to the top surfaces of the sliding plates (93) positioned on two sides of the stirring rod (8).
8. Referring to fig. 1-7, the connecting rope (94) sequentially passes through the through hole (86) and the chute (85) to be fixedly connected to the middle part of the bottom surface of the pressing plate (84).
9. The process for preparing SA composite room temperature vulcanized silicone rubber according to claim 1, which is characterized by comprising the following steps:
the first step, calcining rice hulls at 700 ℃ to obtain white rice hull ash containing 95-98% amorphous silica, converting the rice hull ash into a sodium silicate solution, and boiling the rice hull ash with 2.1 mol sodium hydroxide for 24 hours;
in the second step, the sodium silicate solution is filtered in vacuo and the ionized water is diluted to 0.7 mole. Preparing 1-3mm silica gel hydrogel beads by adopting an acid-base sol method, and performing gel polymerization on a sodium silicate solution in an oil ammonia solution;
thirdly, exchanging the hydrogel with a solvent, adopting an absolute ethyl alcohol Soxhlet extraction method and n-hexane solution surface extraction, modifying by 20% Trimethylchlorosilane (TMCS) to obtain a hydrophobic surface, finally obtaining aerogel particles, drying at 120 ℃ by using an environmental pressure, and further screening the particles with the particle size of 0.5 mm;
fourthly, mechanically stirring and doping the silicon rubber with known weight and room temperature curing into 9 percent of silicon dioxide aerogel, wherein the mixing time is not more than 10 minutes;
and fifthly, coating the substrate with a thickness of 5.0mm, and then degassing under vacuum for curing.
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| CN117330388A (en) * | 2023-11-30 | 2024-01-02 | 是高(北京)智能科技有限公司 | Pretreatment system for chlorosilane impurity detection |
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| CN117330388A (en) * | 2023-11-30 | 2024-01-02 | 是高(北京)智能科技有限公司 | Pretreatment system for chlorosilane impurity detection |
| CN117330388B (en) * | 2023-11-30 | 2024-01-26 | 是高(北京)智能科技有限公司 | Pretreatment system for chlorosilane impurity detection |
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