Preparation method of hair dye and hair dye
The hair dye preparation equipment, which uses a mechanical lever structure and weight adjustment, solves the problem of inaccurate weighing of electronic weighing systems under corrosion and electromagnetic interference, achieves accurate weighing of toxic raw materials and simple operation, and ensures product safety.
Patent Information
- Application Number
- CN202510774335.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-09-12
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing technology, electronic weighing systems are susceptible to corrosion and electromagnetic interference in hair dye production, resulting in inaccurate weighing. Manual weighing is subject to errors and exposure risks, affecting product safety.
The hair dye preparation equipment adopts a purely mechanical structure, uses the lever principle and weight adjustment, combined with auxiliary blocks and rolling balls to achieve accurate weighing of toxic raw materials. The lever structure directly reflects weight changes, avoiding electronic system failures and electromagnetic interference.
It achieves long-term and stable weighing of toxic raw materials in hair dye production, reduces errors and exposure risks, improves weighing reliability and ease of operation, and ensures product safety.
Smart Images
Figure CN120617073A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of hair dye preparation, and in particular relates to a preparation method of a hair dye and the hair dye. Background Art
[0002] In the industrial production of hair dyes, accurate weighing of highly toxic raw materials such as phenylenediamine compounds (such as p-phenylenediamine (PPD) and resorcinol) is a key step in ensuring product safety. However, existing electronic weighing systems, such as electronic scales, are prone to failure or deviation in results after prolonged use in the highly corrosive environment of hair dyes. Furthermore, electromagnetic interference within the factory can also easily interfere with electronic weighing systems.
[0003] However, if a mechanical weighing method with manual participation is used, such as a traditional lever scale, manual reading is required, which increases the risk of exposure. At the same time, when the demand for highly toxic raw materials needs to be adjusted according to different production requirements, the manual reading and weighing method is prone to errors and deviations, affecting subsequent processing. Summary of the Invention
[0004] In view of this, the technical problem to be solved by the present invention is to provide a preparation method of a hair dye and a hair dye, which can accurately weigh toxic raw materials in a long-term and stable manner during the production process of the hair dye to ensure product safety.
[0005] A hair dye preparation device includes a weighing tube and a fixed base, a movable sleeve is slidably connected to the weighing tube, a rectangular frame is fixedly connected to the movable sleeve, a movable head is fixedly connected to the movable sleeve, the movable head is slidably connected in the weighing tube, a rotating frame is rotatably connected to the fixed base, a measuring rod is fixedly connected to the rotating frame, a hanging plate is fixedly connected to the measuring rod, a hanging hole is provided on the hanging plate, a matching sleeve is connected to the measuring rod, the movable head is slidably connected in the weighing tube, and a first compression spring is fixedly connected between the movable sleeve and the weighing tube.
[0006] It also includes an auxiliary plate fixed on the matching sleeve, the auxiliary plate is connected to an auxiliary block, and the auxiliary block can be inserted into the interior of the measuring rod.
[0007] A plurality of rolling balls A are rotatably connected inside the matching sleeve.
[0008] It also includes a connecting seat fixedly connected to the fixing seat, a limiting rod fixedly connected to the connecting seat, a sliding rod connected to the connecting seat, and a rolling ball B that can roll is provided on the front side of the sliding rod.
[0009] The hair dye preparation device is used in a method for preparing hair dye, and the method comprises the following steps:
[0010] Step 1: According to the target raw material weight, hang the corresponding weight on the hanging hole of the hanging plate;
[0011] Step 2: Open the electric control valve of the feed port and inject p-phenylenediamine into the weighing tube;
[0012] Step 3: As the matching sleeve moves to rotate the rotating frame to a vertical position, the switch is triggered to close the valve in the feed port and open the electric control valve of the discharge port;
[0013] Step 4: inject p-phenylenediamine into the mixing tank;
[0014] Step 5: Repeat steps 1 to 4, weigh appropriate weights of resorcinol coupling agent and monoethanolamine alkalizing agent and add them to the mixing tank;
[0015] Step 6: Add hydrogen peroxide solution to the mixing tank and perform subsequent mixing and filling operations to complete the process. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0017] Figure 1 Schematic diagram of the structure of the weighing tube
[0018] Figure 2 It is a structural diagram of a rectangular frame;
[0019] Figure 3 It is a structural diagram of the feeding plate;
[0020] Figure 4 It is a structural diagram of the mobile sleeve;
[0021] Figure 5 Schematic diagram of the structure of the hammer rod;
[0022] Figure 6 It is a structural diagram of the connecting seat;
[0023] Figure 7 It is a structural diagram of the connection frame;
[0024] Figure 8 is a schematic diagram of the turret;
[0025] Figure 9 It is a structural diagram of the matching sleeve;
[0026] Figure 10 It is a structural diagram of the C-frame;
[0027] Figure 11 and Figure 12 This is a structural schematic diagram of a hair dye preparation device. DETAILED DESCRIPTION
[0028] A hair dye preparation device includes a weighing tube 101 and a fixed base 703. A movable sleeve 201 is slidably connected to the weighing tube 101. A rectangular frame 202 is fixed to the movable sleeve 201. A movable head 204 is fixed to the movable sleeve 201. The movable head 204 is slidably connected to the weighing tube 101. A rotating frame 701 is rotatably connected to the fixed base 703. A measuring rod 704 is fixed to the rotating frame 701. A hanging plate 705 is fixed to the measuring rod 704. A hanging hole 706 is opened on the hanging plate 705. The measuring rod 704 is fixed to the measuring rod 704. It is connected with a matching sleeve 601, which can slide along the measuring rod 704. The moving head 204 is slidably connected to the weighing tube 101. The weighing tube 101 is provided with a feed port 102 and a discharge port 104. Both the feed port 102 and the discharge port 104 are provided with electric control valves. The rotating frame 701 divides the measuring rod 704 into two parts, the hanging plate 705 is located in the right half of the rotating frame 701, and the matching sleeve 601 is located in the left half of the rotating frame 701. A first compression spring is fixed between the moving sleeve 201 and the weighing tube 101.
[0029] First, according to actual production needs, hang weights of appropriate weight into the hanging hole 706, and then add dangerous raw materials or toxic dyes into the feed port 102. When adding, the material will gradually enter the weighing tube 101 and push the moving head 204 to slide. When the moving head 204 slides, the moving head 204 will gradually compress the first compression spring, thereby driving the moving sleeve 201 to move. When the moving sleeve 201 moves, the rectangular frame 202 will gradually push the matching sleeve 601 to slide on the measuring rod 704. As the matching sleeve 601 gradually slides, the relative position relationship between the matching sleeve 601 and the measuring rod 704 will gradually change. Due to the lever material, the longer the sliding distance of the matching sleeve 601 is, the greater the rotational force applied to the rotating frame 701 will be. When the matching sleeve 601 slides to the appropriate distance, The rotating frame 701 will rotate to a vertical state, which proves that the amount of hazardous raw materials or toxic dyes added to the weighing tube 101 is at the target amount required for production needs. Subsequently, the electric control valve in the feed port 102 can be closed, and the electric control valve in the discharge port 104 can be opened, so that the materials stored in the weighing tube 101 can be discharged into the mixing tank for subsequent mixing and preparation operations. That is, the lever structure of the rotating frame 701 can reliably monitor the amount of the above-mentioned materials added, ensuring that an appropriate amount of the above-mentioned special materials can be added to the fermentation tank later, avoiding serious consequences caused by excessive addition of special materials. At the same time, by hanging weights of different weights in the hanging hole 706, different production needs can be met, simplifying the adjustment operation steps, reducing the difficulty of the adjustment operation, and further avoiding the occurrence of excessive addition of special materials.
[0030] After the electric control valve in the discharge port 104 is opened, the movable sleeve 201 will gradually slide back and forth due to the elastic force of the first compression spring, and then push the material in the measuring tube 101 through the movable head 204, so that the material is gradually discharged through the position of the discharge port 104, and at the same time, it is convenient to reset the movable sleeve 201 for the next subsequent material adding operation.
[0031] The lever formed by the rotating frame 701 can directly reflect weight changes through the mechanical structure, avoiding the risk of electronic system failure. It is particularly reliable for toxic or hazardous materials. By replacing the weight through the hanging hole 706, different target weights can be set without complex parameter adjustment or recalibration. One-click switching adapts to different formulation requirements, greatly simplifying operation.
[0032] At the same time, the first compression spring pushes the movable sleeve 201 and the movable head 204 to reset during discharge, actively pushing the residual material out of the discharge port 104, reducing residue, and avoiding toxic residues affecting the next batch or mixed material contamination. Furthermore, the movable head 204 scrapes the inner wall of the weighing tube 101 during the reset process, reducing the accumulation of adhesions, reducing the difficulty of cleaning and maintenance frequency, and improving the service life of the equipment.
[0033] At the same time, the operator only needs to hang the weight and start the process, physically isolating toxic raw materials throughout the process, reducing exposure risks and bringing convenience to actual use. Mechanical weighing is not affected by electromagnetic interference or program errors, and the weighing results are stable between batches, ensuring product consistency.
[0034] The weighing effect achieved by the above-mentioned purely mechanical solution can bring higher reliability and simpler operation process compared with the complex sensors or electronic control equipment in the existing technology. It is suitable for production environments with low precision requirements but high risks and low operating difficulty, bringing convenience to the characteristic production environment of the existing technology.
[0035] It also includes an auxiliary plate 602 fixed to the matching sleeve 601 , and an auxiliary block 603 is detachably provided on the auxiliary plate 602 by means of bolts. The auxiliary block 603 can be inserted into the interior of the measuring rod 704 .
[0036] When only replacing the weights is unable to meet the requirements of adjusting the rotating frame 701 to rotate at the appropriate time according to production needs, the auxiliary block 603 can be connected to the auxiliary plate 602 by tightening the bolts, and the auxiliary block 603 can be inserted into the measuring rod 704. The subsequent setting of the auxiliary plate 602 and the auxiliary block 603 enables the matching sleeve 601 to drive the auxiliary plate 602 and the auxiliary block 603 to move synchronously during the movement of the matching sleeve 601, thereby increasing the weight of the moving part, thereby enabling the rotating frame 701 to rotate earlier, thereby further facilitating the rapid and accurate adjustment of the counterweight movement effect on the left side of the measuring rod 704, and further facilitating the precise control of the rotation of the rotating frame 701 at the appropriate time, thereby completing the effect of reliably monitoring the amount of material added.
[0037] That is, by physically increasing the weight of the auxiliary block 603, the lever system is directly intervened to achieve fine-tuning of the critical point of rotation and "sub-weight-level" precision control. For example, when the target weight is between two standard weights, the required torque can be precisely matched by adding a small-mass auxiliary block 603, avoiding the forced selection of an overly heavy weight that would cause the measured value to deviate from the required value.
[0038] Furthermore, during the regular calibration process, the auxiliary blocks 603 are added or removed so that the rotating frame 701 can be accurately triggered into the vertical state under the target weight, thereby restoring the factory accuracy and compensating for the deviation of the lever ratio caused by mechanical wear or assembly tolerance;
[0039] Furthermore, when dealing with high-viscosity and easily agglomerated raw materials such as thickeners or paste dyes in hair dyes, the resistance to pushing the moving head 204 is relatively large, resulting in displacement lag. Increasing the mass of the auxiliary block can trigger the balance in advance, offset the influence of the material flow resistance, and make the measured value consistent with the actual weight.
[0040] A plurality of rolling balls A604 are rotatably connected inside the matching sleeve 601 , and all of the rolling balls A604 can contact the measuring rod 704 .
[0041] When the movable sleeve 201 is slid on the weighing tube 101, and the rectangular frame 202 on the movable sleeve 201 pushes the matching sleeve 601 to slide, the multiple rolling balls A604 can roll during the movement, thereby enabling the matching sleeve 601 to achieve the movement effect on the measuring rod 704. The provision of the multiple rolling balls A604 can reduce the friction caused by the movement of the matching sleeve 601, thereby making it easier for the movable sleeve 201 to push the matching sleeve 601 to slide, further facilitating the precise control of the rotation of the rotating frame 701 at the appropriate time.
[0042] At the same time, the multiple rolling balls A604 can limit the space where the matching sleeve 601 is located, so that the matching sleeve 601 can slide and move smoothly along the measuring rod 704, which facilitates the subsequent pressing and rotating operation of the rotating frame 701.
[0043] The friction interference force is brought close to 0 by rolling the ball A604, and the balance of the lever is completely determined by the weight of the material and the preset counterweight, ensuring the weighing accuracy of the trace addition operation when adding a trace of highly toxic dyes.
[0044] It also includes a connecting base 501 fixedly connected to the fixed base 703, a limiting rod 502 fixedly connected to the connecting base 501, a sliding sleeve detachably connected to the connecting base 501 by bolts, a sliding rod 503 slidingly connected in the sliding sleeve, a rolling ball B504 that can roll is provided on the front side of the sliding rod 503, and a second compression spring is fixedly connected between the sliding rod 503 and the connecting base 501.
[0045] When the rotating frame 701 is in a tilted state, the sliding rod 503 is subjected to the elastic force of the second compression spring to press the rolling ball B504 against the rotating frame 701. When the rotating frame 701 gradually rotates, the rolling ball B504 rolls inside the sliding rod 503, thereby reducing the friction force on the rotating frame 701 during the rotation process through the rolling ball B504, ensuring that the rotating frame 701 can rotate accurately according to the subsequent sliding conditions of the mating sleeve 601.
[0046] After the rotating frame 701 rotates to vertical, the front end of the rotating frame 701 will rest against the limiting rod 502, and at this time the rotating frame 701 will be staggered with the rolling ball B504, so that the slide bar 503 slides under the elastic force of the second compression spring, so that the slide bar 503 is blocked at the rear side of the rotating frame 701, and then the rotating frame 701 in the vertical state is fixed by the cooperation of the limiting rod 502 and the slide bar 503, until the material in the weighing tube 101 is fully pressed out, and then the subsequent inspection and monitoring operation of the amount of special material added is carried out, which completely eliminates the rebound of the rotating frame 701 caused by vibration or accidental touch, and ensures that the metering result is highly reliable before the material is emptied.
[0047] By reducing friction through the rolling ball B504, it is ensured that the lever rotation responds to the real weight, and the limiting rod 502 and the sliding rod 503 freeze the lever posture until the discharge is completed, which can achieve zero interference in the entire process of measurement, locking and discharge, and further ensure the accuracy of weighing. When weighing carcinogenic dyes such as cyananiline, p-phenylenediamine, absolute zero displacement can be guaranteed after locking, preventing excessive lethal doses and ensuring the subsequent preparation effect.
[0048] The device further includes a C-shaped frame 801, to which a hammer rod 401 is slidably connected, a rectangular plate is fixedly connected to the hammer rod 401, an auxiliary oblique block 403 is fixedly connected to the rectangular plate, a third compression spring is fixedly connected between the hammer rod 401 and the C-shaped frame 801, a transmission rod 203 is slidably connected to the rectangular frame 202, a fourth compression spring is fixedly connected between the rectangular frame 202 and the transmission rod 203, a displacement sensor A is fixedly connected to the C-shaped frame 801, a moving end of the displacement sensor A is fixedly connected to the hammer rod 401, a displacement sensor B is fixedly connected to the rectangular frame 202, a moving end of the displacement sensor B is fixedly connected to the transmission rod 203, and an arc chamfer is provided on the rearmost side of the auxiliary oblique block 403.
[0049] When the moving head 204 is gradually squeezed by the material and drives the moving sleeve 201 to slide backward, the transmission rod 203 on the rectangular frame 202 will gradually contact the auxiliary inclined block 403, and then the transmission rod 203 pushes the auxiliary inclined block 403 to make the hammer rod 401 slide on the C-shaped frame 801, overcoming the elastic force of the third compression spring. At this time, it is proved that the material addition operation in the weighing tube 101 has started smoothly, and then the signal obtained by the displacement sensor A can be used to judge whether the material addition operation in the weighing tube 101 has been carried out smoothly. The displacement sensor A is used to detect in real time whether the moving head 204 is displaced normally: if the signal does not change, a blockage warning is issued to avoid the situation where the material cannot be injected due to crystallization or solidification, which is not discovered in time and has a serious impact on the subsequent production process.
[0050] When the material addition is completed, the movable sleeve 201 slides in the opposite direction due to the elastic force of the first compression spring. After the transmission rod 203 on the movable sleeve 201 contacts the arc chamfer on the auxiliary inclined block 403, it will be pushed by the arc chamfer and the transmission rod 203 will slide on the rectangular frame 202, overcoming the elastic force of the fourth compression spring, so that the transmission rod 203 can smoothly pass through the position of the auxiliary inclined block 403. At the same time, the signal obtained by the displacement sensor B can sense that the material has been completely squeezed and discharged at this time, which is convenient for the next material injection operation into the weighing tube 101. The displacement sensor B is used to confirm whether the movable sleeve 201 is reset in place. If the signal is missing, a residual alarm is issued to prevent the viscous paste from being stuck in the discharge port without being discovered in time, affecting the next weighing operation.
[0051] At the same time, the above-mentioned sensor is placed outside the raw material flow path, and the electronic components are physically isolated from poisons or corrosive substances, thereby retaining the anti-corrosion advantages of the above-mentioned structure.
[0052] The transmission ball 702 is fixedly connected to the rotating frame 701 , and the trigger switch 802 is fixedly connected to the C-shaped frame 801 .
[0053] After the rotating frame 701 rotates to a vertical state, the transmission ball 702 on the rotating frame 701 will contact the hammer rod 401, thereby pressing the hammer rod 401 to make the hammer rod 401 slide on the C-shaped frame 801. At this time, the rectangular plate on the hammer rod 401 will contact the trigger switch 802, thereby activating the trigger switch 802, thereby opening the electric control valve in the discharge port 104 to complete the subsequent material discharge operation. A hose can be connected to the discharge port 104, and the other end of the hose is connected to the mixing tank to complete the subsequent material addition operation.
[0054] It also includes an inclined panel 402 fixed to the lower side of the hammer-shaped rod 401, a transmission inclined rod 404 fixed to the hammer-shaped rod 401, a connecting frame 505 fixed to the sliding rod 503, and an inclined rod 506 fixed to the connecting frame 505.
[0055] When the hammer rod 401 moves upward, the rectangular plate on the hammer rod 401 is pressed against the trigger switch 802, thereby starting the subsequent material discharge operation. At this time, the transmission inclined rod 404 on the hammer rod 401 is in a position where it can contact the transmission rod 203. Subsequently, as the material is discharged, the rectangular frame 202 that continues to move causes the transmission rod 203 to pass through the arc chamfered position of the auxiliary inclined block 403 and then contacts the transmission inclined rod 404. The transmission rod 203 will gradually press the hammer rod 401 downward through the transmission inclined rod 404. At this time, the inclined plate 402 on the hammer rod 401 will gradually press the transmission ball 702 to rotate to the right, thereby rotating the rotating frame 701 to the right, thereby facilitating the overall reset of the rotating frame 701 and the matching sleeve 601, so as to facilitate the next accurate weighing and monitoring operation.
[0056] The arrangement of the inclined plate 402 enables the inclined plate 402 to smoothly press the transmission ball 702 to rotate rightward when the hammer rod 401 slides down, thereby ensuring the subsequent transmission effect;
[0057] As the rectangular frame 202 continues to move with the discharge of materials, after the rectangular frame 202 contacts the oblique rod 506, it will transmit the connecting frame 505 so that the connecting frame 505 drives the slide bar 503 to slide on the connecting seat 501 to overcome the elastic force of the second compression spring, and then move the slide bar 503 to a position where it will not block the rotating frame 701. Then, with the cooperation of the rectangular frame 202 and the transmission oblique rod 404, the hammer-shaped rod 401 is driven to slide downward, and the driving effect of resetting the rotating frame 701 is completed, so that the entire device is reset, which is convenient for the next material weighing and monitoring operation.
[0058] It also includes a feeding plate 301 that is slidably connected to the weighing tube 101, a plurality of connecting circular plates 103 are fixed to the weighing tube 101, a plurality of positioning rods 303 are fixed to the feeding plate 301, the plurality of positioning rods 303 are respectively slidably connected to the plurality of connecting circular plates 103, the plurality of positioning rods 303 are fixed to the same driving plate 304, a feeding screw 302 is rotatably connected to the feeding plate 301, a first motor that can drive the feeding screw 302 to rotate is fixed to the feeding plate 301, a second motor is fixed to the weighing tube 101, a lead screw is fixed to the output shaft of the second motor, and the lead screw is threadedly connected to the driving plate 304.
[0059] When adding material into the weighing tube 101, if the material is very viscous and the subsequent operation of pressing the moving head 204 to slide forward cannot be completed smoothly by relying solely on the mutual squeezing of the material, the first motor can be started, and then the first motor can be used to drive the feeding screw 302 to rotate, so that the feeding screw 302 assists in transporting the material, thereby facilitating the smooth pushing of the moving head 204 to complete the moving operation;
[0060] At the same time, the second motor can be started to drive the lead screw to rotate, causing the feed plate 301 to move slightly back and forth, thereby further facilitating the auxiliary pushing of materials with greater viscosity, ensuring the smooth progress of subsequent weighing and monitoring operations.
[0061] The hair dye preparation device is used in a method for preparing hair dye, and the method comprises the following steps:
[0062] Step 1: According to the target raw material weight, mount the corresponding weight on the hanging hole 706 of the hanging plate 705;
[0063] Step 2: Open the electric control valve of the feed port 102 and inject p-phenylenediamine into the weighing tube 101;
[0064] Step 3: As the matching sleeve 601 moves to rotate the rotating frame 701 to a vertical position, the switch 802 is triggered to close the valve in the feed port 102 and open the electric control valve of the discharge port 104;
[0065] Step 4: inject p-phenylenediamine into the mixing tank;
[0066] Step 5: Repeat steps 1 to 4, weigh appropriate weights of resorcinol coupling agent and monoethanolamine alkalizing agent and add them to the mixing tank;
[0067] Step 6: Add hydrogen peroxide solution to the mixing tank and perform subsequent mixing and filling operations to complete the process.
[0068] The hair dye prepared by the hair dye preparation method comprises the following raw materials in parts by weight: 3 parts of p-phenylenediamine, 1.2 parts of resorcinol, 15 parts of monoethanolamine and 35 parts of hydrogen peroxide.
Claims
1. A hair dye preparation device, characterized in that: It includes a weighing tube and a fixed seat, a movable sleeve is slidably connected to the weighing tube, a rectangular frame is fixedly connected to the movable sleeve, a movable head is fixedly connected to the movable sleeve, the movable head is slidably connected in the weighing tube, a rotating frame is rotatably connected to the fixed seat, a measuring rod is fixedly connected to the rotating frame, a hanging plate is fixedly connected to the measuring rod, a hanging hole is opened on the hanging plate, a matching sleeve is connected to the measuring rod, the movable head is slidably connected in the weighing tube, and a first compression spring is fixedly connected between the movable sleeve and the weighing tube.
2. The hair dye preparation device according to claim 1, characterized in that: It also includes an auxiliary plate fixed on the matching sleeve, the auxiliary plate is connected to an auxiliary block, and the auxiliary block can be inserted into the interior of the measuring rod.
3. The hair dye preparation device according to claim 2, characterized in that: A plurality of rolling balls A are rotatably connected inside the matching sleeve.
4. The hair dye preparation device according to claim 3, characterized in that: It also includes a connecting seat fixedly connected to the fixing seat, a limiting rod fixedly connected to the connecting seat, a sliding rod connected to the connecting seat, and a rolling ball B that can roll is provided on the front side of the sliding rod.
5. The hair dye preparation device according to claim 4, characterized in that: It also includes a C-shaped frame, a hammer-shaped rod is slidably connected to the C-shaped frame, an auxiliary oblique block is fixedly connected to the hammer-shaped rod, a third compression spring is fixedly connected between the hammer-shaped rod and the C-shaped frame, a transmission rod is slidably connected to the rectangular frame, and a fourth compression spring is fixedly connected between the rectangular frame and the transmission rod.
6. The hair dye preparation device according to claim 5, characterized in that: A transmission ball is fixedly connected to the rotating frame, and a trigger switch is fixedly connected to the C-shaped frame.
7. The hair dye preparation device according to claim 6, characterized in that: The utility model also comprises an inclined panel fixedly connected to the lower side of the hammer-shaped rod, a transmission inclined rod fixedly connected to the hammer-shaped rod, a connecting frame fixedly connected to the sliding rod, and an inclined rod fixedly connected to the connecting frame.
8. The hair dye preparation device according to claim 7, characterized in that: It also includes a feeding plate that is slidably connected to the weighing tube, multiple connecting circular plates are fixed on the weighing tube, multiple positioning rods are fixed on the feeding plate, the multiple positioning rods are respectively slidably connected to the multiple connecting circular plates, the multiple positioning rods are fixed to the same driving plate, and the feeding screw is rotatably connected to the feeding plate.
9. The method for preparing hair dye using the hair dye preparation device according to claim 6, characterized in that: The method comprises the following steps: Step 1: According to the target raw material weight, hang the corresponding weight on the hanging hole of the hanging plate; Step 2: Open the electric control valve of the feed port and inject p-phenylenediamine into the weighing tube; Step 3: As the matching sleeve moves to rotate the rotating frame to a vertical position, the switch is triggered to close the valve in the feed port and open the electric control valve of the discharge port; Step 4: inject p-phenylenediamine into the mixing tank; Step 5: Repeat steps 1 to 4, weigh appropriate weights of resorcinol coupling agent and monoethanolamine alkalizing agent and add them to the mixing tank; Step 6: Add hydrogen peroxide solution to the mixing tank and perform subsequent mixing and filling operations to complete the process.
10. A hair dye prepared using the hair dye preparation method according to claim 9, characterized in that: The hair dye comprises the following raw materials in parts by weight: 1.5-3 parts of p-phenylenediamine, 0.6-1.2 parts of resorcinol, 10-15 parts of monoethanolamine and 25-35 parts of hydrogen peroxide.