Preparation method of water-based baking varnish for electric bicycle

Abstract

The invention discloses a preparation method of water-based baking varnish for electric bicycles, which comprises the following steps: sequentially weighing raw materials in a weighing bin, sequentially adding the raw materials into a dispersion machine, and uniformly stirring; gradually adding a PH regulator into the titration bin in a stirring state to regulate the PH; weighing the toner with the corresponding color by a weighing bin, and adding the toner in a stirring state; gradually adding a thickening agent into the titration bin in a stirring state to adjust the viscosity, grinding, and returning to the dispersion machine; sequentially weighing other raw materials in the weighing bin, sequentially adding the raw materials into the dispersion machine, and uniformly stirring; adjusting the pH value and the viscosity again; and performing quality inspection after vacuum defoaming by a vacuum pump, and filtering and packaging after qualification. The weighing bin and the titration bin are arranged, so that the weighing and feeding process is automatic, the time consumed in the process is shortened, and the production efficiency of the water-based baking varnish is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based baking varnish production and relates to a method for preparing water-based baking varnish for an electric bicycle. Background Art

[0002] Water-based paint is a paint that uses water as a diluent and is baked to form a film. The VOC emissions of water-based paint are greatly reduced, which is less harmful to the environment and human body. It is a relatively environmentally friendly material. Water-based paint also has the characteristics of high hardness, wear resistance, and corrosion resistance. It is also widely used in the production of electric bicycle frames.

[0003] The production of water-based stoving paint requires multiple steps such as weighing, stirring, testing and adjustment, and grinding. The current production of water-based stoving paint has a poor degree of automation and low production efficiency. Summary of the invention

[0004] In view of the above problems, the present invention proposes a method for preparing water-based baking varnish for electric bicycles, which well solves the problems in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing water-based baking varnish for an electric bicycle, comprising:

[0007] S1. Weigh water, cosolvent, wetting dispersant and deaerator in a weighing bin in turn, add water and cosolvent into a disperser and stir evenly, and add wetting dispersant and deaerator in turn while the disperser is stirring;

[0008] S2. Add pH regulator gradually into the titration chamber under stirring to adjust the pH to 7-8;

[0009] S3, weighing the toner of the corresponding color in the weighing bin, and adding the toner under stirring;

[0010] S4. Add thickener gradually to the titration chamber under stirring, adjust the viscosity to be suitable for grinding, and transfer the material to the grinding equipment;

[0011] S5, grind to appropriate fineness, filter and transfer the material to a disperser;

[0012] S6, add hydroxy acrylic acid dispersion and resin to the weighing bin in turn, weigh them, add them to the disperser and stir them evenly, weigh the co-solvent and water, add them to the disperser and stir them evenly, weigh the wetting and leveling agent, defoamer and deaerator, add them to the disperser and stir them evenly;

[0013] S7, add pH regulator gradually into the titration chamber under stirring to adjust the pH to 5-5;

[0014] S8, weigh the thickener in the weighing bin and add it and stir it evenly, test the viscosity and adjust the viscosity to the appropriate viscosity by adding thickener or water in the titration bin;

[0015] S9, vacuum pump vacuum defoaming after entering the quality inspection, after qualified filtering packaging;

[0016] Among them, a raw material bin for placing raw materials is provided at the upper end of the weighing bin, a solenoid valve is provided at the discharge end of the raw material bin, the discharge end of the raw material bin is opposite to the weighing bin, the weighing bin includes a bin body and a bin frame, a weighing sensor is suspended on the bin frame, the bin body is suspended at the lower end of the weighing sensor, the bin frame is fixedly connected with a plurality of anti-deviation slide rails, the outer side of the bin body is slidably connected to the anti-deviation slide rails, a discharge port with a solenoid valve installed is provided at the bottom of the bin body, the discharge port is opposite to the feed end of the disperser, a reflux regulating tube is provided on the bin wall, the titration bin has the same structure as the weighing bin, and the solenoid valve is connected to the weighing sensor signal.

[0017] Optionally, a plurality of slings for suspending the warehouse body are arranged in a circular array at the lower end of the weighing sensor, and positions of the slings correspond one-to-one to the anti-deviation slide rails.

[0018] Optionally, the anti-deviation slide rail is a C-shaped rail, a sliding body is slidably installed in the anti-deviation slide rail, rollers are installed on the side of the sliding body close to the inner wall of the anti-deviation slide rail, a connecting spring is fixedly installed on the side of the sliding body close to the warehouse body, and the connecting spring is fixedly connected to the warehouse body.

[0019] Optionally, a limit block is fixedly installed on the anti-deflection slide rail, and the limit block is located below the sliding body.

[0020] Optionally, the reflux regulating tube includes a tube body, a sealing plate is slidably installed in the tube body, a driving rod is threadedly connected to the tube body, the driving rod is rotatably installed on the sealing plate, the driving rod is connected to a driving motor, and a liquid outlet is opened at the bottom of the tube body. In a closed state, the sealing plate is flush with the inner wall of the warehouse body.

[0021] Optionally, a sampling tube is fixedly installed on the side wall of the mixing barrel of the disperser, and the sampling tube has the same structure as the reflux regulating tube.

[0022] Optionally, a negative pressure cover is sealedly connected to the upper end of the mixing barrel of the disperser, the mixing shaft of the disperser can rotatably pass through the negative pressure cover, the negative pressure cover is fixedly connected to a negative pressure pipe, the negative pressure pipe is connected to a vacuum pump, and a discharge pipe is arranged at the bottom of the mixing barrel of the disperser, and the discharge pipe is equipped with a sealing valve.

[0023] Optionally, the negative pressure cover is provided with a feed hole, the discharge port is directly opposite to the feed hole, a sealing cover is hingedly connected to the upper end of the negative pressure cover, the sealing cover is connected to a driving member, and the sealing cover is used to seal the feed hole.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The raw materials are placed in the raw material bin, and added to the weighing bin through the raw material bin. The raw materials are weighed and automatically added through the weighing bin and the titration bin, so that the weighing and adding process is automated, the time consumed in the process is reduced, and the production efficiency of water-based baking varnish is improved.

[0026] 2. When placing materials, especially powder materials, in the silo, the silo may be deflected due to poor fluidity and uneven distribution of powder materials. By setting rollers, the friction between the silo and the C-rail is reduced and the weighing accuracy is improved. At the same time, connecting springs are set to provide a certain buffer space when the silo is deflected, reducing the possibility that the roller on one side is subjected to excessive force to support the silo, thereby affecting the weighing accuracy.

[0027] 3. The weighing bin is used to weigh materials. By setting a sealing sheet and a tube structure, after releasing the material to an appropriate amount through the liquid outlet, the sealing sheet is used to push the material in the tube body back into the bin body, so that this part of the material falls into the disperser, reducing the possibility that the material in the reflux regulating tube affects the accuracy of the material quantity, and also reducing the possibility that different materials in the tube body mix with each other and affect the secondary use when the reflux regulating tube is used next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0030] Figure 3 is a schematic structural diagram of a reflux regulating tube according to an embodiment of the present invention;

[0031] Figure 4 Schematic diagram of the structure of the sealing cover part of the embodiment of the present invention.

[0032] Reference numerals: 1, weighing bin; 11, bin body; 12, weighing sensor; 13, anti-deflection slide rail; 131, sliding body; 132, roller; 133, connecting spring; 134, limit block; 14, discharge port; 15, reflux regulating pipe; 151, pipe body; 152, sealing sheet; 153, driving rod; 154, liquid outlet;

[0033] 2. Disperser; 21. Negative pressure cover; 22. Negative pressure pipe; 23. Sealing cover;

[0034] 3. Warehouse shelf. DETAILED DESCRIPTION

[0035] 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.

[0036] See also Figure 1 , which is a method for preparing a water-based baking varnish for an electric bicycle disclosed in an embodiment of the present invention, comprising:

[0037] S1, weigh water, cosolvent, wetting dispersant and deaerator in weighing bin 1 in turn, add water and cosolvent into disperser 2 and stir evenly, add wetting dispersant and deaerator in order while disperser 2 is stirring;

[0038] S2. Add pH regulator gradually into the titration chamber under stirring to adjust the pH to 78;

[0039] S3, weighing bin 1 weighs the toner of the corresponding color and adds the toner under stirring;

[0040] S4. Add thickener gradually to the titration chamber under stirring, adjust the viscosity to be suitable for grinding, and transfer the material to the grinding equipment;

[0041] S5, grinding to a suitable fineness, filtering and transferring the material to disperser 2;

[0042] S6, add hydroxyl acrylic acid dispersion and resin to weighing bin 1 in sequence, weigh them and add them to disperser 2 to mix evenly, weigh co-solvent and water and add them to disperser 2 to mix evenly, weigh wetting and leveling agent, defoamer and deaerator and add them to disperser 2 to mix evenly;

[0043] S7, add pH regulator gradually into the titration chamber under stirring to adjust the pH to 5-5;

[0044] S8, weigh the thickener in the weighing bin 1 and add it and stir it evenly, test the viscosity and adjust it to a suitable viscosity by adding the thickener or water in the titration bin;

[0045] S9, vacuum pump vacuum defoaming after entering the quality inspection, after qualified filtering packaging;

[0046] Among them, a raw material bin for placing raw materials is arranged at the upper end of the weighing bin 1, and an electromagnetic valve is arranged at the discharge end of the raw material bin. The discharge end of the raw material bin is exactly opposite to the weighing bin 1. The weighing bin 1 includes a bin body 11 and a bin frame 3. A weighing sensor 12 is suspended from the bin frame 3. The bin body 11 is suspended at the lower end of the weighing sensor 12. The bin frame 3 is fixedly connected with a plurality of anti-deviation slide rails 13. The outer side of the bin body 11 is slidably connected to the anti-deviation slide rails 13. A discharge port 14 equipped with an electromagnetic valve is arranged at the bottom of the bin body 11. The discharge port 14 is directly opposite to the feed end of the disperser 2. A reflux regulating pipe 15 is arranged on the bin wall of the bin body 11. The titration bin has the same structure as the weighing bin 1, and the electromagnetic valve is connected to the weighing sensor 12 signal.

[0047] Specifically, the raw materials are placed in the raw material bin, and the raw materials are added to the weighing bin 1 through the raw material bin, and the raw materials are weighed and automatically added through the weighing bin 1 and the titration bin.

[0048] In this way, by providing the weighing chamber 1 and the titration chamber, the weighing and adding process is automated, the time consumed in the process is reduced, and the production efficiency of the water-based baking varnish is improved.

[0049] In some feasible ways, the raw material warehouse can select appropriate holding and adding equipment according to different raw materials. The warehouse body 11 is a conical warehouse. A sling made of materials such as a wire rope is arranged below the warehouse frame 3 corresponding to the central axis of the warehouse body 11. A weighing sensor 12 is fixedly connected below the sling. A plurality of slings are fixedly installed below the weighing sensor 12. The sling suspends the weighing warehouse 1. The weighing sensor 12 is suspended above by a single sling, so that the weighing warehouse 1 is suspended as a whole on the weighing sensor 12, thereby improving the weighing accuracy.

[0050] A plurality of anti-deviation slide rails 13 are fixedly mounted on the bin frame 3, and the anti-deviation slide rails 13 are arranged along the outer circumference of the weighing bin 1, and the bin body 11 is slidably connected with the anti-deviation slide rails 13 to prevent the weighing bin 1 from swaying when the raw material bin releases the material;

[0051] The solenoid valve and the discharge port 14 control the discharge of the material. The reflux regulating pipe 15 is installed on the side wall of the weighing bin 1. After the material exceeds the required value, it is released through the reflux regulating pipe 15 and adjusted to the appropriate weighing amount. A raw material barrel can be set under the reflux regulating pipe 15 to receive the raw materials for recycling and reuse. The solenoid valve and the weighing sensor 12 are connected and logically controlled through a controller such as a single-chip microcomputer or a PLC.

[0052] In combination with specific usage scenarios, the preparation process of water-based baking varnish includes raw materials in various forms, and at least two weighing bins 1 for powders and liquids should be provided, and the bin rack 3 is a steel frame structure made according to the installation positions of the weighing bin 1 and the titration bin.

[0053] In some feasible methods, in step S4, a movable transfer bin can be added to transfer the material to the transfer bin. The movable transfer bin can be used to facilitate the transfer of the material to the grinding equipment. After the material is ground, it should first enter the weighing bin 1 for weighing, and then enter the disperser 2, so as to control the amount of raw materials added subsequently.

[0054] As a specific implementation method of the preparation method of water-based baking varnish for electric bicycles provided in the application, please refer to Figure 1 and Figure 2 A plurality of slings for suspending the warehouse body 11 are arranged in a circular array at the lower end of the weighing sensor 12 , and the positions of the slings correspond one by one to the anti-deviation slide rails 13 .

[0055] In general, by setting the position of the sling to correspond one to one with the anti-deviation slide rail 13, the force position of the warehouse body 11 is located at the position of the anti-deviation slide rail 13, thereby improving the force balance of the warehouse body 11 and further reducing the possibility of inaccurate weighing caused by the swing of the warehouse body 11.

[0056] As another specific implementation of a method for preparing water-based baking varnish for an electric bicycle provided in the application, the anti-deviation slide rail 13 is a C-shaped rail, and a sliding body 131 is slidably installed in the anti-deviation slide rail 13, and a roller 132 is installed on the side of the sliding body 131 close to the inner wall of the anti-deviation slide rail 13, and a connecting spring 133 is fixedly installed on the side of the sliding body 131 close to the warehouse body 11, and the connecting spring 133 is fixedly connected to the warehouse body 11.

[0057] In combination with specific usage scenarios, when placing materials, especially powder materials, in the silo 11, the silo 11 may be deflected due to poor fluidity and uneven distribution of the powder materials. By setting the roller 132, the friction between the silo and the C-rail is reduced, and the weighing accuracy is improved. At the same time, the connecting spring 133 is set to have a certain buffer space when the silo 11 is deflected, thereby reducing the possibility that the roller 132 on one side is subjected to excessive force to support the silo 11, thereby affecting the weighing accuracy.

[0058] Furthermore, a limit block 134 is fixedly installed on the anti-deviation slide rail 13 , and the limit block 134 is located below the sliding body 131 .

[0059] It should be understood that by setting the limit block 134, the falling distance of the sliding body 131 is limited. When the sling breaks or other accidents occur, the limit block 134 supports the warehouse body 11 to prevent the warehouse body 11 from falling and causing other impacts.

[0060] In some feasible embodiments, a rectangular groove is formed at the upper end of the limiting block 134 so that the sliding body 131 can be inserted into the rectangular groove after falling, thereby better limiting the falling of the warehouse body 11.

[0061] As a specific implementation method of the preparation method of water-based baking varnish for electric bicycles provided in the application, please refer to Figure 1 and Figure 3 The reflux regulating tube 15 includes a tube body 151, a sealing sheet 152 is slidably installed in the tube body 151, a driving rod 153 is threadedly connected to the tube body 151, the driving rod 153 is rotatably installed on the sealing sheet 152, the driving rod 153 is connected to a driving motor, and a liquid outlet 154 is opened at the bottom of the tube body 151. In the closed state, the sealing sheet 152 is flush with the inner wall of the warehouse body 11.

[0062] In combination with specific usage scenarios, the weighing bin 1 is used to weigh materials. By setting a sealing sheet 152 and a tube body 151 structure, after the material is released to an appropriate amount through the liquid outlet 154, the material in the tube body 151 is pushed back into the bin body 11 through the sealing sheet 152, so that this part of the material falls into the disperser 2, thereby reducing the possibility that the material in the reflux regulating tube 15 may affect the accuracy of the material quantity, and also reducing the possibility that different materials in the tube body 151 may mix with each other and affect the secondary use when the reflux regulating tube 15 is used next time.

[0063] Furthermore, a sampling tube is fixedly installed on the side wall of the mixing barrel of the disperser 2 , and the sampling tube has the same structure as the reflux regulating tube 15 .

[0064] In combination with specific usage scenarios, the sampling tube is used for sampling when detecting pH and viscosity. By setting a sampling tube with the same structure as the reflux regulating tube 15, the material in the tube body 151 is pushed back into the disperser 2 after the sampling is completed, reducing the impact of this part of the material on the next sampling.

[0065] In some feasible embodiments, the tube body 151 is in the shape of a circular tube, the sealing sheet 152 is a circular block that adapts to the shape of the inner wall of the bin body 11, the tube body 151 is closed at one end away from the bin body 11 and a driving motor is slidably installed on it through a slide rail, the driving motor is connected to the driving rod 153, and the driving rod 153 is threadedly connected to the closed end of the tube body 151. When the driving motor drives the driving rod 153 to rotate, the driving motor and the sealing sheet 152 slide to open and close the reflux regulating tube 15.

[0066] As a specific implementation method of the preparation method of water-based baking varnish for electric bicycles provided in the application, please refer to Figure 1 and Figure 4 The upper end of the mixing barrel of the disperser 2 is sealed with a negative pressure cover 21, the mixing shaft of the disperser 2 can rotatably penetrate the negative pressure cover 21, the negative pressure cover 21 is fixedly connected with a negative pressure pipe 22, the negative pressure pipe 22 is connected to a vacuum pump, and a discharge pipe is provided at the bottom of the mixing barrel of the disperser 2, and the discharge pipe is installed with a sealing valve.

[0067] It should be understood that in step S9, a vacuum pump is set to perform vacuum defoaming on the finished water-based paint, and it works together with the defoaming agent to reduce bubbles in the water-based paint and improve product quality. By setting a negative pressure cover 21 and a vacuum pump, defoaming is performed through the stirring barrel of the disperser 2, reducing the process of transferring materials to the defoaming equipment, thereby further improving production efficiency.

[0068] Furthermore, the negative pressure cover 21 is provided with a feed hole, the discharge port 14 is directly opposite to the feed hole, a sealing cover 23 is hingedly connected to the upper end of the negative pressure cover 21, the sealing cover 23 is connected to a driving member, and the sealing cover 23 is used to seal the feed hole.

[0069] It should be understood that by setting the feed hole and the sealing cover 23, the discharge port 14 can complete the feeding without opening the negative pressure cover 21, reducing the process of opening the negative pressure cover 21, further improving work efficiency, and controlling the opening and closing of the sealing cover 23 by the driving member to improve the degree of automation.

[0070] In some feasible embodiments, the stirring shaft of the disperser 2 can rotatably pass through the negative pressure cover 21 and the negative pressure cover 21 is rotated and sealed. The feed hole is a circular hole, the sealing cover 23 is a circular cover, and the driving member can be selected as a cylinder. The hinge position of the sealing cover 23, the negative pressure cover 21 and the driving member is set to a rectangular hole, so that the sealing cover 23 is rotatably connected to the driving member and the negative pressure cover 21 while having a certain sliding space. When the vacuum pump draws air to form a negative pressure in the warehouse body 11, the sealing cover 23 can move and squeeze into the feed hole to form a better seal, and a sealing ring is provided on the side of the sealing cover 23 that contacts the negative pressure cover 21.

[0071] 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 method for preparing water-based baking varnish for electric bicycles, characterized in that: include: S1. Weigh water, cosolvent, wetting dispersant and deaerator in a weighing bin in turn, add water and cosolvent into a disperser and stir evenly, and add wetting dispersant and deaerator in turn while the disperser is stirring; S2. Add pH regulator gradually into the titration chamber under stirring to adjust the pH to 7-8; S3, weighing the toner of the corresponding color in the weighing bin, and adding the toner under stirring; S4. Add thickener gradually to the titration chamber under stirring, adjust the viscosity to be suitable for grinding, and transfer the material to the grinding equipment; S5, grind to appropriate fineness, filter and transfer the material to a disperser; S6, add hydroxy acrylic acid dispersion and resin to the weighing bin in turn, weigh them, add them to the disperser and stir them evenly, weigh the co-solvent and water, add them to the disperser and stir them evenly, weigh the wetting and leveling agent, defoamer and deaerator, add them to the disperser and stir them evenly; S7, add pH regulator gradually into the titration chamber under stirring to adjust the pH to 5-5; S8, weigh the thickener in the weighing bin and add it and stir it evenly, test the viscosity and adjust the viscosity to the appropriate viscosity by adding thickener or water in the titration bin; S9, vacuum pump vacuum defoaming after entering the quality inspection, after qualified filtering packaging; Among them, a raw material bin for placing raw materials is provided at the upper end of the weighing bin, a solenoid valve is provided at the discharge end of the raw material bin, the discharge end of the raw material bin is opposite to the weighing bin, the weighing bin includes a bin body and a bin frame, a weighing sensor is suspended on the bin frame, the bin body is suspended at the lower end of the weighing sensor, the bin frame is fixedly connected with a plurality of anti-deviation slide rails, the outer side of the bin body is slidably connected to the anti-deviation slide rails, a discharge port with a solenoid valve installed is provided at the bottom of the bin body, the discharge port is opposite to the feed end of the disperser, a reflux regulating tube is provided on the bin wall, the titration bin has the same structure as the weighing bin, and the solenoid valve is connected to the weighing sensor signal.

2. The method for preparing a water-based baking varnish for an electric bicycle according to claim 1, characterized in that: A plurality of slings for suspending the warehouse body are arranged in a circular array at the lower end of the weighing sensor, and the positions of the slings correspond one-to-one to the anti-deviation slide rails.

3. The method for preparing a water-based baking varnish for an electric bicycle according to claim 1, characterized in that: The anti-deviation slide rail is a C-shaped rail, in which a sliding body is slidably installed, a roller is installed on the side of the sliding body close to the inner wall of the anti-deviation slide rail, a connecting spring is fixedly installed on the side of the sliding body close to the warehouse body, and the connecting spring is fixedly connected to the warehouse body.

4. The method for preparing a water-based baking varnish for an electric bicycle according to claim 3, characterized in that: The anti-deviation slide rail is fixedly mounted with a limit block, and the limit block is located below the sliding body.

5. The method for preparing a water-based baking varnish for an electric bicycle according to claim 1, characterized in that: The reflux regulating tube includes a tube body, a sealing plate is slidably installed in the tube body, a driving rod is threadedly connected to the tube body, the driving rod is rotatably installed on the sealing plate, the driving rod is connected to a driving motor, a liquid outlet is opened at the bottom of the tube body, and in a closed state, the sealing plate is flush with the inner wall of the warehouse body.

6. The method for preparing a water-based baking varnish for an electric bicycle according to claim 5, characterized in that: A sampling tube is fixedly installed on the side wall of the mixing barrel of the disperser, and the sampling tube has the same structure as the reflux regulating tube.

7. The method for preparing a water-based baking varnish for an electric bicycle according to claim 1, characterized in that: A negative pressure cover is sealed at the upper end of the mixing barrel of the disperser, a mixing shaft of the disperser rotatably passes through the negative pressure cover, a negative pressure pipe is fixedly connected to the negative pressure cover, the negative pressure pipe is connected to a vacuum pump, a discharge pipe is arranged at the bottom of the mixing barrel of the disperser, and a sealing valve is installed on the discharge pipe.

8. The method for preparing a water-based baking varnish for an electric bicycle according to claim 7, characterized in that: The negative pressure cover is provided with a feed hole, the discharge port is directly opposite to the feed hole, a sealing cover is hingedly connected to the upper end of the negative pressure cover, the sealing cover is connected to a driving member, and the sealing cover is used to seal the feed hole.

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