Preparation process of cork composite polyurethane co-foaming thermal insulation material

Abstract

The present invention relates to the field of cork processing technology, in particular to a preparation process of a cork composite polyurethane co-foaming thermal insulation material; comprising the following steps: S1: A raw material configuration: polyol, tin catalyst, amine catalyst, surfactant, physical foaming agent are poured into a blending device in proportion and blended by water; cork particles and nanocellulose are then added into the blending device in proportion, further blended evenly, and configured into A raw material; S2: A raw material and B raw material copolymerization foaming: add B raw material into the blending device where the above-prepared A raw material is located, physically blend, stir evenly, then pour into a mold, foam at room temperature, and obtain a cork composite polyurethane co-foaming thermal insulation material. The preparation process in the present invention solves the bottleneck problems of slow construction of cork as thermal insulation material and large amount of non-renewable raw materials and high cost of polyurethane foaming as thermal insulation material.

Description

Technical Field

[0001] The invention relates to the technical field of cork processing, and in particular to a new process that solves the bottleneck problems of slow construction when using cork as a thermal insulation material and large amount of non-renewable raw materials and high cost when using polyurethane foam as a thermal insulation material, and in particular to a preparation process of a cork composite polyurethane co-foaming thermal insulation material. Background Art

[0002] Building energy consumption accounts for about 40% of the world's total energy consumption. Building insulation materials can effectively improve the thermal insulation performance of buildings and ensure a significant reduction in building energy consumption. Among them, polyurethane foam material, as one of the most common building insulation materials, has the advantages of low density, good thermal insulation performance, simple construction, and quick molding.

[0003] For example, in the prior art patent document with patent application number CN201710112796.3, a polyurethane foam material and a preparation method thereof are disclosed, wherein the polyurethane foam material is prepared by foaming white material, black material, a foaming agent and a nucleating agent, the foaming pore size of the polyurethane foam material is 60-80 μm, and the thermal conductivity is 19-20 mW / mK; the foaming agent includes cyclopentane and isopentane, and the nucleating agent is nitrogen or carbon dioxide; the mass ratio of the white material, the black material, the cyclopentane, the isopentane and the nucleating agent is 98-105:7-11:4-8:8-10:136-142; the method comprises the following steps: (1) adding the combined polyether into the high and low pressure circulation system, and providing a nucleating agent at the filter outlet of the combined polyether pipeline; The invention relates to a nucleating agent adding device. When the combined polyether passes through the filter and is about to enter the mixing tank, the nucleating agent adding device is opened to mix the nucleating agent into the combined polyether, and then the nucleating agent and the combined polyether are added into the mixing tank; (2) the foaming agent is added into the mixing tank and mixed with the combined polyether, and then the mixed foaming agent and the combined polyether are added into the buffer tank; (3) the pressure of the buffer tank is maintained at 12-15Mpa, and the isocyanate is added into the black material tank, and the pressure of the black material tank is maintained at 12Mpa-15Mpa, and the pressure difference between the buffer tank and the black material tank is ≤1Mpa; (4) the combined polyether and the isocyanate are mixed by a gun head and injected into the foaming target cavity for foaming to obtain a polyurethane foam material, the temperature of the foaming target cavity is 35-50°C, and the gun head flow rate is 800-1500g / s.

[0004] It can be seen from the contents recorded in the above patents that existing polyurethane foam materials are mainly derived from petrochemical resources, have the disadvantages of being non-renewable, non-degradable, and having high manufacturing costs, and do not meet the requirements of sustainable development.

[0005] Therefore, it is of positive significance to seek green resource-based, low-cost foam insulation materials as an alternative strategy.

[0006] Considering that the cork from the bark of the cork oak tree is a type of biomass resource with a honeycomb closed-cell structure, it is also renewable, degradable, abundant in resources, low in cost, high in oily cork resin content, lightweight and waterproof, high in compressive strength, and good in thermal insulation properties, and therefore shows certain application potential in energy conservation and insulation.

[0007] However, its use as insulation materials usually requires a hot pressing process and even the use of adhesives. The corresponding preparation process is complicated and not suitable for on-site construction. It is far less fast and convenient than the foaming process used in mainstream building insulation materials.

[0008] Therefore, combining cork with foaming technology to prepare cork-filled polyurethane foam insulation materials is expected to bring out the advantages of both, solve the bottleneck problem of polyurethane foam insulation materials, and realize the rapid and large-scale industrial application of cork in the field of insulation materials.

[0009] To this end, the present invention improves and innovates the new preparation process of traditional cork, and designs a new process that solves the bottleneck problems of slow construction of cork as thermal insulation material and large amount of non-renewable raw materials and high cost of polyurethane foam as thermal insulation material, so as to better solve the problems existing in the prior art. Summary of the invention

[0010] The present invention solves one of the above technical problems, and the technical solution adopted is: a preparation process of a cork composite polyurethane co-foaming thermal insulation material, comprising the following steps:

[0011] S1: A raw material configuration:

[0012] Pour polyol, tin catalyst, amine catalyst, surfactant and physical foaming agent into a blending device in proportion and blend with water;

[0013] Then, cork particles and nanocellulose are added into the blending equipment in proportion, and further blended evenly to prepare raw material A;

[0014] S2: Copolymerization and foaming of raw materials A and B:

[0015] Add the raw material B into the blending equipment where the raw material A prepared above is located, physically blend and stir evenly, then pour into a mold and foam at room temperature to obtain a cork composite polyurethane co-foaming thermal insulation material.

[0016] In any of the above schemes, it is preferred that the polyol described in S1 is polyester polyol; the tin catalyst is dibutyltin dilaurate; the amine catalyst is triethylamine; the surfactant is dimethyl silicone oil; and the physical foaming agent is pentafluorobutane.

[0017] In any of the above schemes, it is preferred that the mass ratio of the polyester polyol, dimethyl silicone oil, dibutyltin dilaurate, triethylamine, water and physical foaming agent is 10: 0.1-0.5: 0.01-0.5: 0.01-0.3: 0.01-0.5: 1-3.

[0018] In any of the above solutions, preferably, the mesh size of the cork particles is 10-1000 mesh.

[0019] In any of the above schemes, preferably, the nanocellulose accounts for 1-2% of the mass of the cork particles, and the blend of the cork particles and the nanocellulose accounts for 0.1-25% of the mass of the A raw material.

[0020] In any of the above schemes, it is preferred that the raw material B is polymethylene polyphenyl isocyanate, wherein the isocyanate index is 0.8-1.5.

[0021] In any of the above schemes, it is preferred that the blending equipment includes a vertical mixing barrel, the bottom of which is installed on a base, and an upper mixing component and a lower mixing component are installed in the vertical mixing barrel from top to bottom in sequence, and the two ends of the upper mixing component and the lower mixing component are respectively movable through the vertical mixing barrel, and the left ends of the upper mixing component and the lower mixing component are movable through the vertical mixing barrel and cooperate with a driving transmission mechanism, and the driving transmission mechanism is used to drive the upper mixing component and the lower mixing component to cooperate and operate to achieve rapid blending of the mixture inside the vertical mixing barrel.

[0022] In any of the above schemes, it is preferred that the driving transmission mechanism includes a torque motor fixedly mounted on the upper left outer wall of the vertical mixing barrel, a reducer is fixedly mounted on the output end of the torque motor, the reducer and the torque motor are respectively fixedly mounted on the outer wall of the vertical mixing barrel through a welding frame, and a coaxial bidirectional transmission assembly is cooperatedly installed at the output end of the reducer, and the coaxial bidirectional transmission assembly is used to cooperate and connect with the upper mixing assembly and the lower mixing assembly.

[0023] In any of the above schemes, it is preferred that the coaxial bidirectional transmission assembly includes a connecting frame fixedly mounted on the left side wall of the vertical mixing barrel, a transmission vertical shaft is movably inserted on the top of the connecting frame, the top of the transmission vertical shaft is connected to the output end of the reducer through a coupling, a total input bevel gear is fixedly connected to the lower end of the transmission vertical shaft, and a left inner shaft driving bevel gear and a right outer shaft driving bevel gear are respectively meshed on both sides of the total input bevel gear, and the right outer shaft driving bevel gear movably passes through the outer positioning sleeve at the corresponding position through the upper gear steel sleeve integrally fixed to the right end of the right outer shaft driving bevel gear, The left end of the upper center inner shaft to which the left inner shaft drives the bevel gear is fixedly connected moves to the left and passes through the left positioning sleeve at the corresponding position. The left positioning sleeve and the outer positioning sleeve are coaxially arranged and fixed to the lower end of the connecting frame at the corresponding position. The right end of the upper center inner shaft moves through the inner cavity of the upper gear steel sleeve and extends into the mixing cavity of the vertical mixing barrel. The total input bevel gear drives the left inner shaft to drive the bevel gear to drive the upper center inner shaft to realize forward rotation. The total input bevel gear drives the right outer shaft to drive the bevel gear to drive the upper gear steel sleeve to reverse.

[0024] In any of the above schemes, it is preferred that the upper mixing assembly includes the upper gear steel sleeve and the upper center inner shaft coaxially arranged in the mixing chamber of the vertical mixing barrel, the right end of the upper center inner shaft movably passes through the vertical mixing barrel, and a plurality of upper reverse stirring members are fixedly installed on the outer side wall of the upper gear steel sleeve in the mixing chamber of the vertical mixing barrel, and an upper forward rotating stirring member is fixedly installed on the outer side wall of the upper center inner shaft in the mixing chamber of the vertical mixing barrel, and each of the upper reverse stirring members and the upper forward rotating stirring member achieve stirring of the internal material through coaxial reverse rotation.

[0025] In any of the above schemes, it is preferred that the lower mixing component includes a lower positioning sleeve horizontally arranged in the mixing chamber below the upper mixing component, the left end of the lower positioning sleeve movably passes through the vertical mixing barrel and cooperates with the upper gear steel sleeve above it through a left gear transmission member, a lower center inner shaft is coaxially inserted in the inner chamber of the upper gear steel sleeve, the right end of the lower center inner shaft movably passes through the vertical mixing barrel, the left end of the lower center inner shaft movably passes through the upper gear steel sleeve and extends to the outside of the vertical mixing barrel, a lower forward-rotating agitator is fixedly installed on the outer side wall of the lower positioning sleeve in the mixing chamber, a plurality of lower reverse-rotating agitators are fixed at intervals on the outer side wall of the lower center inner shaft in the mixing chamber, the right end of the lower center inner shaft movably passes through the vertical mixing barrel and is cooperated and connected with the right end of the upper center inner shaft above it through a right gear transmission member.

[0026] In any of the above schemes, it is preferred that the left-side gear transmission member includes an upper left spur gear and a lower left spur gear that mesh with each other, the upper left spur gear is coaxially fixed on the outer wall of the upper gear steel sleeve at a corresponding position, and the lower left spur gear is coaxially fixed on the outer wall of the lower positioning sleeve at a corresponding position, and a left-side protective cover is provided on the outer covers of the upper left spur gear and the lower left spur gear.

[0027] In any of the above schemes, it is preferred that the right-side gear transmission member includes a right upper spur gear and a right lower spur gear that mesh with each other, the right upper spur gear is coaxially fixed on the right end outer wall of the upper center inner shaft at a corresponding position, and the right lower spur gear is coaxially fixed on the right end outer wall of the lower center inner shaft at a corresponding position, and a right-side protective cover is provided on the outer covers of the right upper spur gear and the right lower spur gear.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The preparation process of the present invention solves the bottleneck problems of slow construction of cork as thermal insulation material and large amount of non-renewable raw materials and high cost of polyurethane foam as thermal insulation material.

[0030] 2. The micron-scale closed-cell honeycomb structure of cork has the function of blocking heat convection and heat conduction.

[0031] 3. The cork micron-scale closed-cell honeycomb structure used in the material prepared by this process enables the material to have the function of blocking heat convection and heat conduction. The cork resin on the surface has a hydrophobic effect, which is further entangled and wrapped by nanocellulose.

[0032] 4. The surface of cork is covered with a large number of hydroxyl groups, which prompts the cork particles to effectively participate in the reaction of isocyanate and act as a nucleating agent, dominating the pore size, pore morphology and uniformity of polyurethane foaming, which not only ensures the structural uniformity of the overall foaming material, but also promotes the strong cross-linking of cork and polyurethane through nanocellulose, thereby giving the final composite foaming insulation material good thermal insulation performance, mechanical strength and waterproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn according to the actual scale.

[0034] Figure 1 It is a structural schematic diagram of the present invention.

[0035] Figure 2It is a schematic diagram of a partially enlarged structure of the present invention.

[0036] In the figure, 1, vertical mixing barrel; 2, base; 3, feed port; 4, discharge port; 5, torque motor; 6, reducer; 7, welding frame; 8, connecting frame; 9, transmission vertical shaft; 10, total input bevel gear; 11, left inner shaft driving bevel gear; 12, right outer shaft driving bevel gear; 13, upper gear steel sleeve; 14, upper center inner shaft; 15, left positioning sleeve; 16, mixing chamber; 17, upper reverse stirring member; 18, upper forward stirring member; 19, lower positioning sleeve; 20, lower center inner shaft; 21, lower forward stirring member; 22, lower reverse stirring member; 23, upper left spur gear; 24, lower left spur gear; 25, left protective cover; 26, upper right spur gear; 27, lower right spur gear; 28, right protective cover. Implementation

[0037] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention. Figure 1-2 as shown in . Example

[0038] The specific steps of a preparation process of a cork composite polyurethane co-foaming thermal insulation material are as follows:

[0039] 1) A raw material configuration:

[0040] Polycarbonate diol: dimethyl silicone oil: dibutyltin diisocyanate: triethylamine: pentafluorobutane are mixed in a mass ratio of 10:0.2:0.07:0.03:2;

[0041] Then, a mixture of 100-mesh cork particles and nanocellulose in a mass ratio of 100:1 was introduced into the mixture, and further stirred to be uniform to prepare raw material A;

[0042] Among them, the blend of cork particles and nanocellulose accounts for 24% of raw material A;

[0043] 2) B raw material configuration:

[0044] Introduce B raw material toluene diisocyanate (isocyanate index is 1.2) into A raw material, physically blend, stir evenly, pour into a mold, and foam at room temperature to obtain a cork composite polyurethane co-foaming insulation material.

[0045] After testing, the foaming time of the obtained foamed insulation material is 10 seconds, the density is 0.048 g / cm3, the thermal conductivity is 0.039 W / (m•K), the compressive strength is 0.32 MPa, and the water absorption is 16%. It has excellent thermal insulation performance, good mechanical properties and waterproof properties, as well as the characteristics of rapid response and efficient foaming, and has the advantages of industrial application. Example

[0046] The specific steps of a preparation process of a cork composite polyurethane co-foaming thermal insulation material are as follows:

[0047] 1) A raw material configuration:

[0048] Blend polycaprolactone polyol: dimethyl silicone oil: dibutyltin disilicate: triethylamine: pentafluorobutane in a mass ratio of 10:0.3:0.05:0.04:1;

[0049] Then, a mixture of 100-mesh cork particles and nanocellulose in a mass ratio of 100:2 is introduced into the mixture, and further stirred to be uniform to prepare raw material A;

[0050] Among them, the blend of cork particles and nanocellulose accounts for 25% of raw material A;

[0051] 2) B raw material configuration:

[0052] Introduce isophorone diisocyanate (isocyanate index is 1.2) (B raw material) into A raw material, physically blend, stir evenly, pour into a mold, and foam at room temperature to obtain a cork composite polyurethane co-foaming insulation material.

[0053] After testing, the foaming time of the obtained foamed insulation material is 13 seconds, the density is 0.056 g / cm3, the thermal conductivity is 0.042 W / (m•K), the compressive strength is 0.30 MPa, and the water absorption is 15%. It has excellent thermal insulation performance, good mechanical properties and waterproof properties, as well as the characteristics of rapid response and efficient foaming, and has the advantages of industrial application. Example

[0054] The difference from Example 2 is that:

[0055] The above-mentioned blending equipment includes a vertical mixing barrel 1, the bottom of which is installed on a base 2, and an upper mixing component and a lower mixing component are installed in the vertical mixing barrel 1 from top to bottom in sequence, and the two ends of the upper mixing component and the lower mixing component are respectively movable through the vertical mixing barrel 1, and the left ends of the upper mixing component and the lower mixing component are movable through the vertical mixing barrel 1 and cooperate with a driving transmission mechanism, and the driving transmission mechanism is used to drive the upper mixing component and the lower mixing component to cooperate and operate to realize rapid blending of the mixture inside the vertical mixing barrel 1, and a feed port 3 is arranged at the top of the vertical mixing barrel 1, and a discharge port 4 with a valve is arranged at the bottom.

[0056] The blending equipment is mainly used in the raw material configuration step. Various raw materials can be better blended through the blending equipment. When working, the driving transmission mechanism is used as a single power driving component, and a single power is used to drive the upper mixing component and the lower mixing component inside the vertical mixing barrel 1 to achieve multi-directional rotation mixing, effectively ensuring the efficiency and effect of mixing.

[0057] In any of the above schemes, it is preferred that the driving transmission mechanism includes a torque motor 5 fixedly mounted on the upper left outer side wall of the vertical mixing barrel 1, and a reducer 6 is fixedly mounted on the output end of the torque motor 5. The reducer 6 and the torque motor 5 are respectively fixedly mounted on the outer side wall of the vertical mixing barrel 1 through a welding frame 7, and a coaxial bidirectional transmission assembly is installed at the output end of the reducer 6, and the coaxial bidirectional transmission assembly is used to cooperate and connect with the upper mixing assembly and the lower mixing assembly.

[0058] When the drive transmission mechanism is working, the torque motor 5 is powered on, and the torque motor 5 drives the reducer 6 to rotate, and then transmits the power to the coaxial bidirectional transmission component, which simultaneously drives the corresponding upper mixing component and the lower mixing component to operate.

[0059] In any of the above schemes, it is preferred that the coaxial bidirectional transmission assembly includes a connecting frame 8 fixedly mounted on the left side wall of the vertical mixing barrel 1, a transmission vertical shaft 9 is movably inserted on the top of the connecting frame 8, the top of the transmission vertical shaft 9 is connected to the output end of the reducer 6 through a coupling, a total input bevel gear 10 is fixedly connected to the lower end of the transmission vertical shaft 9, and a left inner shaft driving bevel gear 11 and a right outer shaft driving bevel gear 12 are respectively meshed on both sides of the total input bevel gear 10, the right outer shaft driving bevel gear 12 is movably passed through the upper gear steel sleeve 13 at the corresponding position through the upper gear steel sleeve 13 integrally fixed to its right end, and the left inner The left end of the upper center inner shaft 14 fixedly connected to the center of the shaft driving bevel gear 11 moves to the left and passes through the left positioning sleeve 15 at the corresponding position. The left positioning sleeve 15 and the upper gear steel sleeve 13 are coaxially arranged and fixed at the lower end of the connecting frame 8 at the corresponding position. The right end of the upper center inner shaft 14 moves through the inner cavity of the upper gear steel sleeve 13 and extends into the mixing cavity 16 of the vertical mixing barrel 1. The total input bevel gear 10 drives the left inner shaft driving bevel gear 11 to drive the upper center inner shaft 14 to realize forward rotation. The total input bevel gear 10 drives the right outer shaft driving bevel gear 12 on the right side to drive the upper gear steel sleeve 13 to reverse.

[0060] The transmission process of the coaxial bidirectional transmission assembly is that the reducer 6 drives the transmission vertical shaft 9, and the total input bevel gear 10 at the bottom of the transmission vertical shaft 9 will respectively drive the left inner shaft driving bevel gear 11 and the right outer shaft driving bevel gear 12 meshing with it on the left and right sides to rotate in the opposite direction. During the rotation of the left inner shaft driving bevel gear 11 and the right outer shaft driving bevel gear 12, the corresponding upper gear steel sleeve 13 and the upper center inner shaft 14 will be driven to achieve coaxial reverse rotation. Since the inner ends of the upper gear steel sleeve 13 and the upper center inner shaft 14 extend into the interior of the vertical mixing barrel 1, the upper mixing assembly and the lower mixing assembly will be driven to rotate when they rotate, thereby realizing multi-directional rotation mixing up and down, and better achieving blending.

[0061] In any of the above schemes, it is preferred that the upper mixing assembly includes the upper gear steel sleeve 13 and the upper center inner shaft 14 coaxially arranged in the mixing chamber 16 of the vertical mixing barrel 1, the right end of the upper center inner shaft 14 movably passes through the vertical mixing barrel 1, and a plurality of upper reverse stirring members 17 are fixedly installed on the outer side wall of the upper gear steel sleeve 13 in the mixing chamber 16 of the vertical mixing barrel 1, and an upper forward rotating stirring member 18 is fixedly installed on the outer side wall of the upper center inner shaft 14 in the mixing chamber 16 of the vertical mixing barrel 1, and each of the upper reverse stirring members 17 and the upper forward rotating stirring member 18 achieves stirring of the internal material through coaxial reverse rotation.

[0062] When the upper mixing assembly is working, the coaxial reverse rotation of the upper gear steel sleeve 13 and the upper central inner shaft 14 drives the upper reverse stirring members 17 and the upper forward stirring members 18 to achieve stirring of the internal materials through coaxial reverse rotation, thereby effectively improving the stirring effect.

[0063] In any of the above schemes, it is preferred that the lower mixing component includes a lower positioning sleeve 19 horizontally arranged in the mixing chamber 16 below the upper mixing component, the left end of the lower positioning sleeve 19 movably passes through the vertical mixing barrel 1 and is matched with the upper gear steel sleeve 13 above it through the left gear transmission member, and a lower central inner shaft 20 is coaxially inserted in the inner cavity of the upper gear steel sleeve 13, and the right end of the lower central inner shaft 20 movably passes through the vertical mixing barrel 1, and the lower central inner shaft 20 is coaxially inserted in the inner cavity of the upper gear steel sleeve 13. 0 moves through the upper gear steel sleeve 13 and extends to the outside of the vertical mixing barrel 1, a lower forward-rotating agitator 21 is fixedly installed on the outer wall of the lower positioning shaft sleeve 19 in the mixing chamber 16, and a plurality of lower reverse-rotating agitators 22 are fixed at intervals on the outer wall of the lower central inner shaft 20 in the mixing chamber 16, and the right end of the lower central inner shaft 20 moves out of the vertical mixing barrel 1 and is matched and connected with the right end of the upper central inner shaft 14 above it through the right gear transmission member.

[0064] When the lower mixing assembly is working, the left gear transmission member and the right gear transmission member are used to respectively drive the lower positioning sleeve 19 and the lower central inner shaft 20 to rotate, thereby driving the lower forward rotating stirring member 21 and the lower reverse rotating stirring member 22 at the corresponding position to rotate coaxially and in the opposite direction, thereby achieving a better stirring effect.

[0065] When stirring inside the vertical mixing drum 1, the purpose of rapid stirring can be achieved by the linkage of the four stirring members, namely, the upper forward-rotating stirring member 18, the upper reverse-rotating stirring member 17, the lower forward-rotating stirring member 21, and the lower reverse-rotating stirring member 22, thereby improving the blending effect and efficiency.

[0066] In any of the above schemes, it is preferred that the left-side gear transmission member includes an upper left spur gear 23 and a lower left spur gear 24 that mesh with each other, the upper left spur gear 23 is coaxially fixed on the outer wall of the upper gear steel sleeve 13 at the corresponding position, and the lower left spur gear 24 is coaxially fixed on the outer wall of the lower positioning sleeve 19 at the corresponding position, and a left-side protective cover 25 is provided on the outer side covers of the upper left spur gear 23 and the lower left spur gear 24.

[0067] The left gear transmission member can transmit power and adjust the rotation direction when transmitting, and the transmission purpose is achieved through the meshing of the upper left spur gear 23 and the lower left spur gear 24.

[0068] In any of the above schemes, it is preferred that the right-side gear transmission member includes a right upper spur gear 26 and a right lower spur gear 27 that mesh with each other, the right upper spur gear 26 is coaxially fixed on the right end outer wall of the upper center inner shaft 14 at the corresponding position, and the right lower spur gear 27 is coaxially fixed on the right end outer wall of the lower center inner shaft 20 at the corresponding position, and a right-side protective cover 28 is provided on the outer side covers of the right upper spur gear 26 and the right lower spur gear 27.

[0069] The right gear transmission member can transmit power and adjust the rotation direction during transmission, and the transmission purpose is achieved through the meshing of the upper right spur gear 26 and the lower right spur gear 27.

[0070] This blending equipment is mainly used in the raw material configuration process. Through this blending equipment, various raw materials can be better blended. When working, the drive transmission mechanism is used as a single power drive component, and the upper mixing component and the lower mixing component inside the vertical mixing barrel 1 are driven by a single power to achieve multi-directional rotation mixing, effectively ensuring the efficiency and effect of mixing. During blending, polyols, tin catalysts, amine catalysts, surfactants, and physical foaming agents are poured into the blending equipment in proportion to achieve blending through water; then cork particles and nanocellulose are added to the blending equipment in proportion, further blended evenly, and configured into raw material A; raw material A and raw material B are copolymerized and foamed: raw material B is added to the blending equipment where the raw material A is obtained, physically blended, stirred evenly, and then poured into a mold, foamed at room temperature, and a cork composite polyurethane co-foaming insulation material is obtained.

[0071] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. For those skilled in the art, any replacement, improvement or change made to the implementation mode of the present invention falls within the protection scope of the present invention.

[0072] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A preparation process of a cork composite polyurethane co-foamed thermal insulation material, characterized in that: The steps include: S1: A raw material preparation: polyol, tin catalyst, amine catalyst, surfactant, and physical foaming agent are poured into a blending device in proportion and blended with water; cork particles and nanocellulose are then added into the blending device in proportion, and further blended evenly to prepare A raw material; S2: Copolymerization and foaming of raw material A and raw material B: Add raw material B into the blending equipment where the raw material A prepared above is located, physically blend and stir evenly, then pour into a mold and foam at room temperature to obtain a cork composite polyurethane co-foaming thermal insulation material; The blending device comprises a vertical mixing barrel, the bottom of which is mounted on a base, an upper mixing assembly and a lower mixing assembly are sequentially mounted in the vertical mixing barrel from top to bottom, the two ends of the upper mixing assembly and the lower mixing assembly are respectively movable through the vertical mixing barrel, the left ends of the upper mixing assembly and the lower mixing assembly are movable through the vertical mixing barrel and cooperate with a driving transmission mechanism, the driving transmission mechanism is used to drive the upper mixing assembly and the lower mixing assembly to cooperate and operate to realize rapid blending of the mixture inside the vertical mixing barrel; The driving transmission mechanism includes a torque motor fixedly mounted on the left upper outer side wall of the vertical mixing barrel, a reducer is fixedly mounted on the output end of the torque motor, the reducer and the torque motor are respectively fixedly mounted on the outer side wall of the vertical mixing barrel through a welding frame, and a coaxial bidirectional transmission assembly is matched and mounted on the output end of the reducer, and the coaxial bidirectional transmission assembly is used to match and connect with the upper mixing assembly and the lower mixing assembly; The coaxial bidirectional transmission assembly includes a connecting frame fixedly installed on the left side wall of the vertical mixing barrel, a transmission vertical shaft is movably inserted on the top of the connecting frame, the top of the transmission vertical shaft is connected to the output end of the reducer through a coupling, a total input bevel gear is fixedly connected to the lower end of the transmission vertical shaft, and a left inner shaft driving bevel gear and a right outer shaft driving bevel gear are respectively meshed on both sides of the total input bevel gear, the right outer shaft driving bevel gear movably passes through the outer positioning shaft sleeve at the corresponding position through the upper gear steel sleeve integrally fixed to the right end of the right outer shaft driving bevel gear, and the left inner shaft driving bevel gear is fixedly connected to the output end of the reducer through a coupling, and a total input ... The left end of the upper center inner shaft fixedly connected to the center of the movable bevel gear moves to the left and passes through the left positioning sleeve at the corresponding position. The left positioning sleeve and the outer positioning sleeve are coaxially arranged and fixed to the lower end of the connecting frame at the corresponding position. The right end of the upper center inner shaft moves through the inner cavity of the upper gear steel sleeve and extends into the mixing cavity of the vertical mixing barrel. The total input bevel gear drives the left inner shaft to drive the bevel gear to drive the upper center inner shaft to realize forward rotation. The total input bevel gear drives the right outer shaft to drive the bevel gear to drive the upper gear steel sleeve to reverse. The upper mixing assembly comprises the upper gear steel sleeve and the upper central inner shaft coaxially arranged in the mixing chamber of the vertical mixing barrel, the right end of the upper central inner shaft movably passes through the vertical mixing barrel, a plurality of upper reverse stirring members are fixedly mounted on the outer side wall of the upper gear steel sleeve in the mixing chamber of the vertical mixing barrel, and an upper forward stirring member is fixedly mounted on the outer side wall of the upper central inner shaft in the mixing chamber of the vertical mixing barrel, and each of the upper reverse stirring members and the upper forward stirring member achieve stirring of the internal material through coaxial reverse rotation; The lower mixing assembly comprises a lower positioning sleeve horizontally arranged in the mixing chamber below the upper mixing assembly, the left end of the lower positioning sleeve movably passes through the vertical mixing barrel and is matched with the upper gear steel sleeve above it through a left gear transmission member, a lower central inner shaft is coaxially inserted in the inner chamber of the upper gear steel sleeve, the right end of the lower central inner shaft movably passes through the vertical mixing barrel, the left end of the lower central inner shaft movably passes through the upper gear steel sleeve and extends to the outside of the vertical mixing barrel, a lower forward-rotating agitator is fixedly installed on the outer side wall of the lower positioning sleeve in the mixing chamber, a plurality of lower reverse-rotating agitators are fixed at intervals on the outer side wall of the lower central inner shaft in the mixing chamber, the right end of the lower central inner shaft movably passes through the vertical mixing barrel and is matched with the right end of the upper central inner shaft above it through a right gear transmission member; When working, the driving transmission mechanism is used as a single power driving component, and a single power is used to drive the upper mixing component and the lower mixing component inside the vertical mixing barrel to realize multi-directional rotation mixing.

2. The preparation process of a cork composite polyurethane co-foamed thermal insulation material according to claim 1, characterized in that: The polyol described in S1 is polyester polyol; the tin catalyst is dibutyltin dilaurate; the amine catalyst is triethylamine; the surfactant is dimethyl silicone oil; and the physical foaming agent is pentafluorobutane.

3. The preparation process of a cork composite polyurethane co-foamed thermal insulation material according to claim 2, characterized in that: The mass ratio of the polyester polyol, dimethyl silicone oil, dibutyltin disilicate, triethylamine, water and physical foaming agent is 10: 0.1-0.5: 0.01-0.5: 0.01-0.3: 0.01-0.5: 1-3.

4. The preparation process of a cork composite polyurethane co-foamed thermal insulation material according to claim 3, characterized in that: The mesh number of the cork particles is 10-1000 meshes.

5. The preparation process of a cork composite polyurethane co-foamed thermal insulation material according to claim 4, characterized in that: Nanocellulose accounts for 1-2% of the mass of the cork particles, and the blend of cork particles and nanocellulose accounts for 0.1-25% of the mass of raw material A as a whole.

6. The preparation process of a cork composite polyurethane co-foamed thermal insulation material according to claim 5, characterized in that: The raw material B is polymethylene polyphenyl isocyanate, wherein the isocyanate index is 0.8-1.5.

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