Water-borne wood paint formula and production process thereof

Abstract

The invention relates to a water-borne wood paint formula and a production process thereof. Comprising the following raw materials in parts by weight: 50-80 parts of deionized water, 1-3 parts of an anticorrosive bactericide, 500-600 parts of an acrylic emulsion, 20-30 parts of a coalescing agent, 0.5-1 part of a neutralizing agent, 4-5 parts of a defoaming agent, 10-20 parts of a hardening agent, 1-2 parts of a wetting agent, 3-5 parts of a flatting agent, 5-10 parts of a dispersing agent, 20-30 parts of a polyurethane associated thickener and 100-200 parts of water-based color paste. The preparation method further comprises the following steps: S1, adding the deionized water and the antiseptic bactericide into the mixing equipment according to a ratio, and pre-mixing; s2, sequentially adding an acrylic emulsion, a coalescing agent, a neutralizing agent, a defoaming agent, a hardening agent, a wetting agent, a flatting agent, a dispersing agent and a polyurethane associated thickening agent into the mixing equipment, and fully and uniformly dispersing to obtain a toning base material, and S3, adding the water-based color paste into the mixing equipment according to different color requirements, and carrying out color blending with the toning base material; the water-borne wood paint has the advantages that the VOCS emission is reduced, and the overall quality of the water-borne wood paint is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based wood paint, and in particular relates to a water-based wood paint formula and a production process thereof. Background Art

[0002] Water-based wood paint is a wood paint that uses water as a diluent. It has environmentally friendly features such as low odor and low volatile organic compounds (VOC), and is favored by more and more consumers.

[0003] In the prior art, most wood paints are solvent-based two-component paints. The VOCS emissions during the production and use processes do not meet the national environmental protection standards, and professional spray painters and professional spray gun tools are required to operate, which greatly increases the difficulty and limitations of construction. In addition, a small number of water-based wood paints on the market have low paint film gloss, lower hardness than solvent-based paints, and limited adhesion to the substrate, which cannot meet market demand. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a water-based wood paint formula and a production process thereof that can reduce VOCS emissions and improve the overall quality of water-based wood paint.

[0005] The technical solution of the present invention is as follows:

[0006] The water-based wood coating formula includes the following raw materials in the following proportions:

[0007] 50-80 parts of deionized water, 1-3 parts of preservative and bactericidal agent, 500-600 parts of acrylic emulsion, 20-30 parts of film-forming aid, 0.5-1 parts of neutralizer, 4-5 parts of defoamer, 10-20 parts of hardener, 1-2 parts of wetting agent, 3-5 parts of leveling agent, 5-10 parts of dispersant, 20-30 parts of polyurethane associative thickener, 100-200 parts of water-based color paste.

[0008] The present invention also provides a water-based wood paint production process, comprising the following steps:

[0009] S1, deionized water and preservatives and bactericides are added into the mixing equipment in proportion for premixing;

[0010] S2, then add acrylic emulsion, film-forming aid, neutralizer, defoamer, hardener, wetting agent, leveling agent, dispersant, polyurethane associative thickener to the mixing device in sequence, and fully disperse them to obtain a toning base material;

[0011] S3. According to different color requirements, add water-based color paste into the mixing equipment and mix it with the color base material for color matching.

[0012] Furthermore, the stirring speed of step S1 is 200-400 rpm, and the stirring speed of steps S2-S3 is 500-1000 rpm.

[0013] Further, the mixing device comprises a barrel body capable of discharging materials from the bottom, an end cover fixed to the top of the barrel body, a plurality of material discharge devices arranged on the end cover, and a stirring component arranged in the middle of the end cover, wherein a stirring blade is arranged at the bottom of the stirring component and the stirring blade is driven to move up and down when the stirring blade is driven to rotate, and the stirring component is unidirectionally connected to the top of the end cover so that the stirring component can generate flowing gas when the stirring blade is driven to move up and down;

[0014] The feeding device is provided with a reversing solenoid valve and a displacement component for driving the feeding device to discharge materials. The stirring component is connected with the displacement component. The reversing solenoid valve is connected with the displacement component to realize the switching control of the displacement component exhaust and the feeding device discharging materials. The top cover is provided with an overflow valve connected with multiple displacement components. When the feeding device discharges materials, the flowing gas enters the displacement component and causes the stirring component and the displacement component to transmit.

[0015] Further, the stirring assembly includes a driving motor fixed to the top of the end cover, a stirring reciprocating screw rotatably connected to the end cover, a displacement block arranged on the stirring reciprocating screw, a fixed cylinder fixed to the end cover, and a lifting cylinder fixed to the displacement block, the stirring reciprocating screw is located in the barrel body and connected to the driving motor coaxially, the stirring reciprocating screw is arranged concentrically with the fixed cylinder, and the stirring reciprocating screw is connected to the stirring blade;

[0016] The lifting cylinder is sealably inserted into the fixed cylinder and the other end is rotatably and sealably connected to the stirring blade;

[0017] The fixed cylinder is connected to the displacement component, and the stirring reciprocating screw is transmitted to the displacement component when the material discharge device discharges materials.

[0018] Furthermore, the material discharge device comprises a shell fixed on the end cover, a feed check valve fixed on the top of the shell, a material extraction hood located inside the shell, a pull-down plate fixed on the bottom of the material extraction hood, and an extrusion plate located below the pull-down plate, the extrusion plate is in contact and sealed with the shell, a displacement assembly is arranged in the shell and connected with the pull-down plate and the extrusion plate, an anti-return check valve is arranged at the lower end of the material extraction hood, and the anti-return check valve is fixedly connected to a material discharge barrel having one end sealed and passing through the extrusion plate;

[0019] The material extraction cover is made of elastic material and is communicated with the feed one-way valve.

[0020] Further, the displacement assembly includes at least two reciprocating screws for feeding material vertically connected to the inside of the shell, a lifting block arranged on the reciprocating screws for feeding material, a displacement barrel fixed to the upper side of the lifting block, a pull-down piston sealed and inserted in the displacement barrel, a transmission shell arranged at the bottom of the shell, and a transmission wheel arranged in the transmission shell, the upper end of the reciprocating screw for feeding material is provided with a guide plate inserted in the displacement barrel, and the bottom of the lifting block is sealed and connected with a telescopic sleeve sealed and connected to the shell;

[0021] The pull-down piston is connected to the pull-down plate;

[0022] The lifting block is fixedly connected to the extrusion plate;

[0023] The lower end rotation seal of the unloading reciprocating screw passes through the housing and extends into the transmission housing. The unloading reciprocating screw is rotationally connected with the transmission wheel. The transmission housing is connected with the fixed cylinder, the overflow valve and the reversing solenoid valve. The transmission wheel drives the unloading reciprocating screw to rotate after the pressure of the transmission housing increases. The transmission wheel is driven by the stirring reciprocating screw.

[0024] The pull-down piston, the guide plate and the lifting block are respectively provided with a second distance sensor and a first distance sensor.

[0025] Furthermore, the end cover rotation seal is connected to a transmission pulley that rotates synchronously with the stirring reciprocating screw, a circular ring cavity opened on the end cover, a transmission shaft rotationally connected to the circular ring cavity, and a driven pulley driven by the transmission pulley, the transmission shaft rotation seal passes through the end cover and is connected to the transmission wheel, multiple transmission wheels in the same transmission housing are driven, and the transmission wheel is separately connected to the unloading reciprocating screw and the transmission shaft.

[0026] Furthermore, an arc-shaped plug-in groove is provided on the inner side surface of the transmission wheel rotatably connected to the unloading reciprocating screw in the circumferential direction, and two mirror-image displacement cavities are provided at the lower end of the unloading reciprocating screw. An insert block that slides radially along the unloading reciprocating screw is sealed and inserted in the displacement cavity. The two insert blocks are elastically connected, and the insert blocks can be inserted in the plug-in groove.

[0027] Furthermore, the unloading reciprocating screw is provided with an air suction hole, and a connecting hole connected to the displacement chamber is provided at the lower side of the air suction hole. The plug block blocks the connecting hole, and when the plug block is inserted into the plug-in slot, the connecting hole is no longer blocked. The air suction hole is connected to one end of the displacement barrel located above the guide plate.

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

[0029] 1. Reduce VOCS emissions: Use low-VOC raw materials, and no longer need to add auxiliary solvents during the preparation process, thereby reducing VOCS emissions to below the national environmental protection standards;

[0030] 2. Simplify construction requirements and expand the scope of application: Use leveling agents, defoamers and other additives to achieve good leveling, defoaming and anti-sagging properties when spraying, rolling and brushing; due to the simplicity of construction, it can be rolled or brushed by yourself, making water-based environmentally friendly wood paint have great advantages in the renovation of old furniture;

[0031] 3. Improve the overall quality of water-based wood paint: Use high-quality emulsions, wetting agents, and hardeners to greatly improve the gloss (spectrometer test is 90 degrees), hardness (pencil hardness test reaches more than 2H), adhesion, etc. of water-based wood paint; at the same time, no solvent is added during the preparation process, making the water-based wood paint formaldehyde, toluene, heavy metals and other harmful substances almost zero, greatly improving the practicality of water-based wood paint in homes.

[0032] In summary, the present invention has the advantages of reducing VOCS emissions, simplifying construction requirements, expanding the scope of application, and improving the overall quality of water-based wood paint. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a process flow chart of the present invention;

[0034] Figure 2 A schematic diagram of the structure of the mixing device used in the process of the present invention;

[0035] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0036] Figure 4 For the present invention Figure 3 A schematic diagram of the structure of the displacement component;

[0037] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of part C;

[0038] Figure 6 For the present invention Figure 2 A schematic diagram of the structure of the enlarged portion B;

[0039] Figure 7 For the present invention Figure 2 A schematic diagram of the structure of a transmission housing;

[0040] Figure 8 For the present invention Figure 2 A schematic diagram of a top view structure;

[0041] Fig. 9 For the present invention Figure 2 Schematic diagram of the main structure.

[0042] In the figure, 1, barrel, 2, end cover, 3, unloading device, 31, feed check valve, 32, extraction cover, 33, anti-return check valve, 34, unloading barrel, 35, reversing solenoid valve, 36, transmission wheel, 361, plug slot, 37, displacement assembly, 371, connecting plate, 372, pull-down piston, 373, unloading reciprocating screw, 3731, displacement chamber, 3732, plug block, 3733, connecting hole, 374, first distance sensor, 375. Air suction hole; 376. Guide plate; 377. Second distance sensor; 378. Telescopic sleeve; 379. Lifting block; 370. Displacement barrel; 38. Extrusion plate; 39. Pull-down plate; 30. Shell; 301. Transmission shell; 4. Driving motor; 5. Stirring reciprocating screw; 51. Driving pulley; 52. Driving shaft; 53. Driven pulley; 6. Fixed cylinder; 7. Displacement block; 8. Lifting cylinder; 9. Stirring blade; 10. Overflow valve. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] The water-based wood coating formula includes the following raw materials in the following proportions:

[0046] 50-80 parts of deionized water, 1-3 parts of preservative and bactericidal agent, 500-600 parts of acrylic emulsion, 20-30 parts of film-forming aid, 0.5-1 parts of neutralizer, 4-5 parts of defoamer, 10-20 parts of hardener, 1-2 parts of wetting agent, 3-5 parts of leveling agent, 5-10 parts of dispersant, 20-30 parts of polyurethane associative thickener, 100-200 parts of water-based color paste.

[0047] Example 2

[0048] The water-based wood coating formula includes the following raw materials in the following proportions:

[0049] 50 parts of deionized water, 1 part of preservative and bactericidal agent, 500 parts of acrylic emulsion, 20 parts of film-forming aid, 0.5 parts of neutralizer, 4 parts of defoamer, 10 parts of hardener, 1 part of wetting agent, 3 parts of leveling agent, 5 parts of dispersant, 20 parts of polyurethane associative thickener, and 100 parts of water-based color paste.

[0050] Example 3

[0051] The water-based wood coating formula includes the following raw materials in the following proportions:

[0052] 80 parts of deionized water, 3 parts of preservative and bactericidal agent, 600 parts of acrylic emulsion, 30 parts of film-forming aid, 1 part of neutralizer, 5 parts of defoamer, 20 parts of hardener, 2 parts of wetting agent, 5 parts of leveling agent, 10 parts of dispersant, 30 parts of polyurethane associative thickener, and 200 parts of water-based color paste.

[0053] Example 4

[0054] See also Figure 1-9 As shown, the water-based wood paint production process includes the raw materials and corresponding proportions of any one of embodiments 1-3, and also includes the following steps.

[0055] S1, deionized water and preservatives and fungicides are added to a mixing device in proportion for premixing, and the stirring speed is 200-400 rpm;

[0056] S2, then add acrylic emulsion, film-forming aid, neutralizer, defoamer, hardener, wetting agent, leveling agent, dispersant, polyurethane associative thickener to the mixing device in sequence, and fully disperse them to obtain a toning base material, and the stirring speed is 500-1000 rpm;

[0057] S3. According to different color requirements, add the water-based color paste into the mixing equipment and mix it with the color base material at a stirring speed of 500-1000 rpm.

[0058] In this embodiment, the mixing device includes a barrel body 1 capable of discharging materials from the bottom, an end cover 2 fixed to the top of the barrel body 1 by bolts, a plurality of discharge devices 3 arranged on the end cover 2, and a stirring assembly arranged in the middle of the end cover 2, a stirring blade 9 is arranged at the bottom of the stirring assembly, and the stirring assembly drives the stirring blade 9 to move up and down when the stirring blade 9 is driven to rotate, and the stirring assembly is connected to the top of the end cover 2 in one direction through a pipeline and a one-way valve, so that the stirring assembly can generate flowing gas when the stirring blade 9 is driven to move up and down;

[0059] The unloading device 3 is provided with a reversing solenoid valve 35 and a displacement component 37 for driving the unloading device 3 to unload materials. The stirring component is connected to the displacement component 37. The reversing solenoid valve 35 is connected to the displacement component 37 to realize the switching control of the displacement component 37 exhaust and the unloading of the unloading device 3. The top cover is provided with a relief valve 10 connected to a plurality of displacement components 37. When the unloading device 3 unloads materials, the flowing gas enters the displacement component 37 and causes the stirring component and the displacement component 37 to drive.

[0060] When in use, the unloading devices 3 are connected to the corresponding material barrels through pipelines, and then the driving and stirring components work, and the reversing solenoid valves 35 corresponding to the unloading devices 3 are opened one by one. The opening order can refer to the order of putting the raw materials in the above process, and the above raw materials are all liquid. If they are not liquid, the non-liquid raw materials can be mixed with deionized water in advance to form liquid raw materials, and the corresponding used deionized water can be removed when adding materials later to ensure the mixing ratio;

[0061] After the material discharge device 3 is opened, the airflow generated when the stirring device is lifted and displaced enters the displacement component 37, so that the displacement component 37 and the stirring component are transmitted. The displacement component 37 controls the material discharge device 3 to extract the raw materials in the material barrel and discharge the materials according to the above proportion. The raw materials enter the barrel body 1, and the stirring component drives the stirring blade 9 to move up and down while stirring the materials to ensure uniform stirring.

[0062] A corresponding valve is arranged at the bottom of the barrel 1 to control the discharge of materials.

[0063] In this embodiment, the stirring assembly includes a driving motor 4 fixed to the top of the end cover 2, a stirring reciprocating screw 5 rotatably connected to the end cover 2, a displacement block 7 arranged on the stirring reciprocating screw 5, a fixed cylinder 6 fixed to the end cover 2, and a lifting cylinder 8 fixed to the displacement block 7. The stirring reciprocating screw 5 is located in the barrel body 1 and is coaxially connected to the driving motor 4. The stirring reciprocating screw 5 is concentrically arranged with the fixed cylinder 6, and the stirring reciprocating screw 5 is connected to the stirring blade 9.

[0064] The lifting cylinder 8 is sealed and inserted into the fixed cylinder 6, and the other end is rotatably and sealedly connected to the stirring blade 9 through a bearing and a sealing ring;

[0065] The fixed cylinder 6 is connected to the displacement assembly 37, and the stirring reciprocating screw 5 is transmitted with the displacement assembly 37 when the material discharge device 3 discharges the material;

[0066] When in use, the driving motor 4 works and drives the stirring reciprocating screw 5 and the stirring blade 9 to rotate. At this time, the displacement block 7 moves up and down and drives the lifting cylinder 8 to move. As the lifting cylinder 8 moves, the gas in the fixed cylinder 6 flows into the displacement component 37, so that the displacement component 37 and the stirring reciprocating screw 5 are transmitted, thereby driving the corresponding unloading device 3 to unload.

[0067] Preferably, the driving motor 4 is a servo motor, which can achieve precise material feeding control based on the material feeding amount of the material feeding device 3 .

[0068] In this embodiment, the unloading device 3 includes a shell 30 fixed on the end cover 2, a feed check valve 31 fixed on the top of the shell 30, a material extraction cover 32 located inside the shell 30, a pull-down plate 39 fixed at the bottom of the material extraction cover 32, and an extrusion plate 38 located below the pull-down plate 39. The extrusion plate 38 is in contact and sealed with the shell 30. The displacement assembly 37 is arranged in the shell 30 and connected with the pull-down plate 39 and the extrusion plate 38. The lower end of the material extraction cover 32 is provided with an anti-return check valve 33. The anti-return check valve 33 is fixedly connected to a unloading barrel 34 having one end sealed and passing through the extrusion plate 38.

[0069] The material extraction cover 32 is made of elastic material and is connected to the feed check valve 31;

[0070] When in use, the feed one-way valve 31 is connected to the material barrel through a pipeline, and the displacement assembly 37 drives the extrusion plate 38 and the pull-down plate 39 to move back and forth. When the pull-down plate 39 is pulled down, the extraction hood 32 is stretched, so that the raw materials in the material barrel enter the extraction hood 32. Then the pull-down plate 39 is reset, and the material in the extraction hood 32 passes through the anti-return one-way valve 33 and the discharge barrel 34 and enters under the extrusion plate 38, and is squeezed out of the shell 30 by the extrusion plate 38 during the next reciprocating movement, thereby realizing the addition of raw materials.

[0071] Optionally, the extraction cover 32 may also be made of a hard cover material and be slidably and sealingly connected to the inner wall of the shell 30, thereby achieving the extraction of raw materials.

[0072] In this embodiment, the displacement assembly 37 includes four reciprocating screws 373 for feeding material vertically rotatably connected to the inside of the housing 30, a lifting block 379 arranged on the reciprocating screws 373 for feeding material, a displacement barrel 370 fixed to the upper side of the lifting block 379, a pull-down piston 372 sealed and inserted in the displacement barrel 370, a transmission shell 301 arranged at the bottom of the housing 30, and a transmission wheel 36 arranged in the transmission shell 301. A guide plate 376 inserted in the displacement barrel 370 is arranged at the upper end of the reciprocating screw 373 for feeding material, and a telescopic sleeve 378 sealed and connected to the housing 30 is sealed at the bottom of the lifting block 379;

[0073] The pull-down piston 372 is connected to the pull-down plate 39 through the connecting plate 371, and the pull-down plate 39 contacts the inner wall of the housing 30;

[0074] The lifting block 379 is fixedly connected to the extrusion plate 38;

[0075] The lower end of the unloading reciprocating screw 373 rotates and seals through the housing 30 and extends into the transmission housing 301. The unloading reciprocating screw 373 is rotatably connected with the transmission wheel 36. The transmission housing 301 is connected with the fixed cylinder 6, the overflow valve 10 and the reversing solenoid valve 35. The transmission wheel 36 drives the unloading reciprocating screw 373 to rotate after the pressure of the transmission housing 301 increases. The transmission wheel 36 is transmitted to the stirring reciprocating screw 5.

[0076] The pull-down piston 372 , the guide plate 376 and the lifting block 379 are respectively provided with a second distance sensor 377 and a first distance sensor 374 .

[0077] When in use, the pressure in the transmission housing 301 increases, the transmission wheel 36 and the unloading reciprocating screw 373 are driven, and the lifting block 379 is lifted and reciprocated, and the lifting block 379 drives the pull-down plate 39 and the extrusion plate 38 to move. When the unloading reciprocating screw 373 rotates, the upper end of the unloading reciprocating screw 373 is limited by the guide plate 376, the displacement barrel 370 and the pull-down plate 39 to avoid deviation during rotation;

[0078] In normal use, due to the raw materials, the pull-down plate 39 needs a certain force in the process of pulling down, and since the air pressure in the displacement barrel 370 is certain, the pull-down piston 372 moves up in the process of pulling down, and the pull-down plate 39 and the displacement barrel 370 are no longer in contact. At this time, the distance value detected by the second distance sensor 377 is in a normal state. When there is a lack of material in the material barrel, that is, there is air in the pipeline, when the pull-down plate 39 is pulled down, the pull-down piston 372 does not move up. At this time, the distance value detected by the second distance sensor 377 is less than the distance value in the normal state. Therefore, an alarm can be issued at this time, and the alarm can be realized by the alarm method in the prior art, such as an alarm light.

[0079] The pull-down piston 372 is fixedly connected to the connecting plate 371, and the connecting plate 371 is fixedly connected to the pull-down plate 39. The pull-down piston 372 is a polygonal piston, and correspondingly, the displacement barrel 370 is a polygonal barrel to ensure the normal lifting of the lifting block 379.

[0080] As for the first distance sensor 374, the number of reciprocating times can be determined according to the distance change to the minimum and maximum, and the filling capacity can be confirmed according to the maximum capacity in the shell 30 and the extrusion plate 38 bracket, and the discharge amount can be controlled at the distance when the extrusion plate 38 is pressed down for the last time, thereby ensuring the accuracy of discharge.

[0081] In this embodiment, the end cover 2 is rotatably sealed and connected with a drive pulley 51 that rotates synchronously with the stirring reciprocating screw 5, a circular ring cavity opened on the end cover 2, a drive shaft 52 that is rotatably connected to the circular ring cavity, and a driven pulley 53 that drives the drive pulley 51. The drive shaft 52 rotatably seals and passes through the end cover 2 and is connected to the drive wheel 36. Multiple drive wheels 36 in the same drive housing 301 are driven, and the drive wheel 36 is separately connected to the unloading reciprocating screw 373 and the drive shaft 52.

[0082] When in use, the stirring reciprocating screw 5 drives the corresponding transmission wheel 36 to rotate through the transmission pulley 51, the driven pulley 53, and the transmission shaft 52 to ensure material discharge.

[0083] In this embodiment, an arc-shaped plug-in groove 361 is provided on the inner side of the transmission wheel 36 rotatably connected to the material-removing reciprocating screw 373 along the circumferential direction, and two mirror-image displacement chambers 3731 are provided at the lower end of the material-removing reciprocating screw 373. An insert block 3732 that slides radially along the material-removing reciprocating screw 373 is sealed and inserted in the displacement chamber 3731. The two insert blocks 3732 are elastically connected by a spring, and the insert blocks 3732 can be inserted in the plug-in groove 361.

[0084] When in use, the reversing solenoid valve 35 controls the transmission housing 301 to stop discharging gas. At this time, the pressure in the transmission housing 301 increases, and the plug block 3732 is displaced radially along the unloading reciprocating screw 373 and inserted into the plug-in groove 361. At this time, the transmission wheel 36 and the unloading reciprocating screw 373 are transmitted. When transmission is not required, the reversing solenoid valve 35 is controlled to switch to communication, and at this time, the two plug blocks 3732 are elastically reset.

[0085] In this embodiment, the blanking reciprocating screw 373 is provided with an air suction hole 375, and a connecting hole 3733 communicating with the displacement chamber 3731 is provided at the lower side of the air suction hole 375. The plug block 3732 blocks the connecting hole 3733, and when the plug block 3732 is inserted into the insertion slot 361, the connecting hole 3733 is no longer blocked, and the air suction hole 375 is connected to one end of the displacement barrel 370 located above the guide plate 376;

[0086] When in use, after the plug block 3732 is displaced, the air above the guide plate 376 of the displacement barrel 370 is extracted to ensure that the pull-down piston 372 can move up normally when there is raw material in the material barrel, and will not move when there is no raw material. The pressure in the transmission housing 301 can be adjusted according to the requirements of the overflow valve 10;

[0087] The number of the overflow valves 10 and the feeding devices 3 can be the same;

[0088] The lifting block 379 and the guide plate 376 are both provided with holes for allowing air to enter the transmission housing 301 from the upper end of the displacement barrel 370 .

[0089] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-based wood paint formula, characterized by: The raw materials include the following proportions: 50-80 parts of deionized water, 1-3 parts of preservative and bactericidal agent, 500-600 parts of acrylic emulsion, 20-30 parts of film-forming aid, 0.5-1 parts of neutralizer, 4-5 parts of defoamer, 10-20 parts of hardener, 1-2 parts of wetting agent, 3-5 parts of leveling agent, 5-10 parts of dispersant, 20-30 parts of polyurethane associative thickener, 100-200 parts of water-based color paste.

2. A process for producing water-based wood paint, comprising raw materials in the proportions described in claim 1, characterized in that: The steps include: S1, deionized water and preservatives and bactericides are added into the mixing equipment in proportion for premixing; S2, then add acrylic emulsion, film-forming aid, neutralizer, defoamer, hardener, wetting agent, leveling agent, dispersant, polyurethane associative thickener to the mixing device in sequence, and fully disperse them to obtain a toning base material; S3. According to different color requirements, add water-based color paste into the mixing equipment and mix it with the color base material for color matching.

3. The process for producing waterborne wood lacquer according to claim 2, characterized in that: The stirring speed of step S1 is 200-400 rpm, and the stirring speed of steps S2-S3 is 500-1000 rpm.

4. The process for producing water-based wood lacquer according to claim 3, characterized in that: The mixing device comprises a barrel body capable of discharging materials from the bottom, an end cover fixed to the top of the barrel body, a plurality of material discharge devices arranged on the end cover, and a stirring assembly arranged in the middle of the end cover, wherein a stirring blade is arranged at the bottom of the stirring assembly and the stirring blade is driven to move up and down when the stirring blade is driven to rotate, and the stirring assembly is unidirectionally connected to the top of the end cover so that the stirring assembly can generate flowing gas when the stirring blade is driven to move up and down; The feeding device is provided with a reversing solenoid valve and a displacement component for driving the feeding device to discharge materials. The stirring component is connected with the displacement component. The reversing solenoid valve is connected with the displacement component to realize the switching control of the displacement component exhaust and the feeding device discharging materials. The top cover is provided with an overflow valve connected with multiple displacement components. When the feeding device discharges materials, the flowing gas enters the displacement component and causes the stirring component and the displacement component to transmit.

5. The process for producing water-based wood lacquer according to claim 4, characterized in that: The stirring assembly includes a driving motor fixed on the top of the end cover, a stirring reciprocating screw rotatably connected to the end cover, a displacement block arranged on the stirring reciprocating screw, a fixed cylinder fixed on the end cover, and a lifting cylinder fixed on the displacement block, the stirring reciprocating screw is located in the barrel body and connected to the driving motor coaxially, the stirring reciprocating screw is concentrically arranged with the fixed cylinder, and the stirring reciprocating screw is connected to the stirring blade; The lifting cylinder is sealably inserted into the fixed cylinder and the other end is rotatably and sealably connected to the stirring blade; The fixed cylinder is connected to the displacement component, and the stirring reciprocating screw is transmitted to the displacement component when the material discharge device discharges materials.

6. The process for producing waterborne wood lacquer according to claim 5, characterized in that: The material discharge device comprises a shell fixed on the end cover, a feed check valve fixed on the top of the shell, a material extraction hood located inside the shell, a pull-down plate fixed on the bottom of the material extraction hood, and an extrusion plate located below the pull-down plate, wherein the extrusion plate is in contact and sealed with the shell, a displacement assembly is arranged in the shell and connected with the pull-down plate and the extrusion plate, an anti-return check valve is arranged at the lower end of the material extraction hood, and the anti-return check valve is fixedly connected to a material discharge barrel having one end sealed and passing through the extrusion plate; The material extraction cover is made of elastic material and is communicated with the feed one-way valve.

7. The process for producing water-based wood lacquer according to claim 6, characterized in that: The displacement assembly includes at least two reciprocating screws for feeding material vertically connected to the inside of the shell, a lifting block arranged on the reciprocating screws for feeding material, a displacement barrel fixed to the upper side of the lifting block, a pull-down piston sealed and inserted in the displacement barrel, a transmission shell arranged at the bottom of the shell, and a transmission wheel arranged in the transmission shell, the upper end of the reciprocating screw for feeding material is provided with a guide plate inserted in the displacement barrel, and the bottom of the lifting block is sealed and connected with a telescopic sleeve sealed and connected to the shell; The pull-down piston is connected to the pull-down plate; The lifting block is fixedly connected to the extrusion plate; The lower end rotation seal of the unloading reciprocating screw passes through the housing and extends into the transmission housing. The unloading reciprocating screw is rotationally connected with the transmission wheel. The transmission housing is connected with the fixed cylinder, the overflow valve and the reversing solenoid valve. The transmission wheel drives the unloading reciprocating screw to rotate after the pressure of the transmission housing increases. The transmission wheel is driven by the stirring reciprocating screw. The pull-down piston, the guide plate and the lifting block are respectively provided with a second distance sensor and a first distance sensor.

8. The process for producing water-based wood lacquer according to claim 7, characterized in that: The end cover rotation seal is connected to a transmission pulley that rotates synchronously with the stirring reciprocating screw, an annular cavity opened on the end cover, a transmission shaft rotationally connected to the annular cavity, and a driven pulley driven by the transmission pulley. The transmission shaft rotation seal passes through the end cover and is connected to the transmission wheel. Multiple transmission wheels in the same transmission housing are driven, and the transmission wheels are separately connected to the unloading reciprocating screw and the transmission shaft.

9. The process for producing waterborne wood lacquer according to claim 8, characterized in that: An arc-shaped plug-in groove is provided on the inner side surface of the transmission wheel rotatably connected to the unloading reciprocating screw in the circumferential direction, and two mirror-image displacement cavities are provided at the lower end of the unloading reciprocating screw. An insert block that slides radially along the unloading reciprocating screw is sealed and inserted in the displacement cavity. The two insert blocks are elastically connected, and the insert blocks can be inserted in the plug-in groove.

10. The process for producing water-based wood lacquer according to claim 9, characterized in that: The unloading reciprocating screw is provided with an air suction hole, and a connecting hole connected to the displacement chamber is provided at the lower side of the air suction hole. The plug-in block blocks the connecting hole, and when the plug-in block is inserted into the insertion slot, the connecting hole is no longer blocked. The air suction hole is connected to one end of the displacement barrel located above the guide plate.

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