XY-PT-⊘15JDAB 15mm Crimp perfume fine mist pump sprayer short type

How to improve the spray uniformity of the 15mm crimp perfume mist pump short nozzle?

Spray uniformity is the core performance indicator of the perfume nozzle, which directly affects the user's experience of the fragrance diffusion effect. The 15mm crimp perfume mist pump short nozzle has a compact structure and is suitable for small-diameter containers. The improvement of its spray uniformity requires the coordinated optimization of design accuracy, material properties, production process and testing standards. The following specific plans are developed from multiple dimensions:

1. Optimize the core structural design of the nozzle

The structural design of the nozzle is the basis for determining the uniformity of the spray, and it is necessary to make fine improvements in the three key parts of the fluid channel, atomization component, and crimp seal.
Streamlined design of fluid channel
The internal fluid channel (including the liquid inlet, guide cavity, and nozzle hole) of the 15mm short nozzle needs to adopt a streamlined structure to avoid right angles, protrusions, and other designs that are prone to turbulence. Through computational fluid dynamics (CFD) simulation, the gradient curve of the inner diameter of the channel is optimized to ensure that the perfume flows smoothly in the channel and reduce the atomization deviation caused by uneven flow rate. For example, the inner diameter of the channel from the liquid inlet to the nozzle hole is smoothly transitioned from 1.2mm to 0.8mm, so that the liquid forms a stable laminar state under pressure, laying the foundation for uniform atomization.
High-precision processing of atomization holes
The nozzle hole is a key component of atomization, and its aperture accuracy and shape symmetry directly affect the spray form. It is recommended to use laser micro-hole processing technology to control the aperture tolerance within ±0.005mm to ensure that the inner wall of the channel is smooth and burr-free. At the same time, a symmetrical multi-hole design (such as 3-4 atomization holes with a diameter of 0.3mm are evenly distributed in a ring) is adopted to make the liquid spray out synchronously from multiple directions, and the spray deviation that may be generated by a single channel is offset by airflow interference, thereby improving the overall uniformity.
Matching of crimp structure and seal
The crimp design needs to ensure the concentricity of the nozzle and the bottle body. If the assembly deviation exceeds 0.1mm, it may cause uneven pressure on the liquid and the problem of excessive or weak local spray. Therefore, the depth of the card slot and the height of the protrusion of the buckle must be strictly matched with the bottle diameter, and the elastic compensation of the silicone sealing ring must be used to ensure that the nozzle is completely aligned with the axis of the bottle body after assembly to avoid pressure distribution imbalance caused by tilting.

2. Improve material performance and surface treatment process

The physical properties and surface state of the material will affect the fluidity and atomization effect of the liquid. It is necessary to select materials and optimize the surface treatment process in a targeted manner.
Select materials with low friction coefficient
It is recommended to use modified POM (polyoxymethylene) or LCP (liquid crystal polymer) for the core components of the nozzle (such as pistons and valve cores). These materials have excellent wear resistance and low friction coefficient (≤0.2), which can reduce the resistance fluctuation of the liquid during the flow process. At the same time, add fluorine coating (such as PTFE) to the surface in contact with the liquid to reduce the adhesion of the liquid, avoid unstable flow caused by local residue, and ensure uniform spray volume.
Precision oxidation treatment of aluminum surface
For nozzles containing aluminum parts (such as push rods and shells), the surface finish and hardness need to be improved through anodizing process. The thickness of the oxide film is controlled at 8-12μm, and the film layer is uniform and pinhole-free, avoiding the phenomenon of liquid hanging on the wall due to rough surface. For example, Zhangjiagang XinYe Chemical Sprayer Co., Ltd uses a fully automatic oxidation production line in the aluminum oxide surface treatment process. By accurately controlling the electrolyte concentration and current density, the consistency of the aluminum component surface is ensured, providing a stable physical basis for the smooth passage of liquid.
Material stability of seals
Seals (such as silicone gaskets) in leak-proof design must use food-grade silicone with strong chemical resistance, and the Shore A hardness is controlled at 50-60 degrees, which not only ensures good sealing, but also provides stable elastic feedback when pressed. By adjusting the vulcanization process of silicone, internal bubbles and impurities are reduced, pressure leakage caused by uneven deformation of seals is avoided, and the pressure of the liquid in the nozzle is ensured to be stable, providing continuous power for uniform atomization.

3. Improve production process and automatic control

Precision control in the production process is the key to ensuring the implementation of the design plan, and human errors need to be reduced through standardized processes and automated equipment.
Parameter optimization of injection molding
The plastic parts of the nozzle (such as the flow guide cavity and the atomizer seat) need to be produced by a high-precision injection molding machine, focusing on controlling the injection temperature (such as POM material controlled at 190-210℃), holding pressure (30-50MPa) and cooling time (15-20 seconds) to avoid structural deviations caused by shrinkage and flash. A closed-loop control system is used to monitor the cavity pressure and temperature in real time to ensure the dimensional consistency of each batch of products, such as controlling the concentricity error of the atomizer seat within 0.02mm.
Precise positioning of automated assembly
The assembly process of the nozzle (such as the docking of the atomizer hole and the flow guide cavity, the matching of the spring and the piston) needs to adopt a visually guided automated assembly line, with a CCD camera to detect the position of the components in real time, and cooperate with the micron-level positioning accuracy of the robot arm (±0.01mm) to ensure that the coaxiality error of each component does not exceed 0.03mm. This automated production mode can effectively avoid the randomness of manual assembly. For example, the automated assembly line of Zhangjiagang XinYe Chemical Sprayer Co., Ltd. ensures the assembly accuracy of each nozzle through multi-station synchronous detection, providing process guarantee for spray uniformity.
Consistency control of aluminum oxide surface treatment
The oxidation treatment of aluminum parts requires strict control of electrolyte composition (such as sulfuric acid concentration 150-200g/L), temperature (18-22℃) and oxidation time (20-30 minutes). The electrolyte concentration is maintained stable through the automatic liquid replenishment system to avoid differences in liquid flow resistance caused by uneven film thickness. At the same time, ultrasonic cleaning is used to remove residual impurities after oxidation to ensure that the surface roughness Ra≤0.8μm and reduce irregular adhesion of liquid on the surface.

4. Strengthening detection standards and quality control

Establish a full-process detection system to detect deviations in time through precise measurement and data analysis to achieve closed-loop control of spray uniformity.
Quantitative detection of spray morphology
A laser particle size analyzer and a high-speed camera are used to detect the spray of the nozzle, record the droplet diameter distribution (the target Dv50 is controlled at 20-30μm, and the ratio of Dv90 to Dv10 is ≤2.5) and the spray angle (30°±5° is recommended) to ensure that the droplet size is uniform and the distribution range is narrow. At the same time, the spray coverage density within a distance of 10cm is detected by a fog distribution instrument, and the deviation of the number of droplets per unit area is required to be no more than 5%, avoiding local over-density or over-sparseness.
Pressure stability test
Simulate the actual use scenario, and detect the fluctuation value of the spray flow (≤±3%) under different pressing forces (2-5N) and bottle pressure (0.2-0.4MPa) to ensure that the spray volume remains stable when the user's pressing speed changes. The pressure curve during the pressing process is recorded in real time by a pressure sensor to eliminate products with sudden pressure changes caused by valve core wear or poor sealing.
Reliability verification of the entire life cycle
Accelerated aging tests (such as 5,000 press cycles) are conducted to detect the attenuation of spray uniformity, requiring that the change rate of droplet diameter after the cycle does not exceed 10%. At the same time, the sealing and spray performance are tested in high and low temperature environments (-5°C to 40°C) to ensure that the stable atomization effect can be maintained under extreme conditions, in line with the strict standards of ISO9001-2008 quality system certification.

5. Collaborative supply chain and customer demand optimization

The improvement of spray uniformity needs to be combined with the actual use scenarios of customers, and customized services are used to meet the adaptation needs of different perfume formulas.
Targeted mold development
Different perfumes have different viscosities and surface tensions (such as alcohol-containing perfumes and essential oil perfumes have different fluidity), and the internal structure of the nozzle needs to be adjusted according to the customer's formula. For example, a larger guide cavity is designed for high-viscosity perfumes, and a splash-proof guide cover is added for low-surface tension perfumes. Zhangjiagang XinYe Chemical Sprayer Co., Ltd has an independent mold development workshop that can quickly customize molds according to customer needs and ensure that the spray uniformity is adapted to specific formulas by adjusting the flow channel parameters.
Step-by-step process adjustment plan
In view of the differences between small-batch trial production and large-scale mass production, step-by-step process parameters are formulated. For example, 3D printing is used to quickly verify the structural design during the trial production phase, and automated equipment is used to solidify the parameters during the mass production phase. At the same time, multiple production plans are provided for customers to choose from, balancing cost and efficiency while ensuring uniformity.