In the dispensing process, the choice of mixing method is very important, which directly affects the production efficiency, cost control, product performance and other key aspects. Because different adhesive have complex and diverse characteristics, accurately matching their mixing needs has become the core point to ensure stable and efficient production.
With profound technical accumulation and concept, XETAR adopts advanced eccentric screw metering pump technology based on infinite piston principle to create a diversified hybrid system. The mixing weight ratio of the system can reach 100:3, the adhesive output range is unlimited, and the adhesive output speed can be selected from 0.001g/s to 30g/s, which can fully meet the personalized needs of different production scenarios and provide excellent solutions for all kinds of production.
The key to achieve scientific decision-making and accurate matching of mixing methods lies in the in-depth consideration of the characteristics of glue, including viscosity, viscosity ratio, mixing ratio, operational time and physical and chemical characteristics. Only based on these detailed parameters, can we accurately select the appropriate mixing method for different adhesive, so as to ensure the smooth development of the dispensing process and high-quality results.
I. Static mixing
1. Introduction of static mixing tube
Principle: Without external power, it only relies on the pressure of the fluid itself to push the material through the fixed mixing structure in the pipeline (such as spiral blades, baffles, etc.), and realizes mixing through segmentation, shearing, turning, etc.
Structure: It is usually a tubular device with built-in mixing units of complex geometry (such as spiral type and labyrinth type), and the mixing elements are fixed.
Features: simple structure, low cost, no moving parts, easy maintenance; the mixing effect depends on the fluid pressure and flow rate, suitable for low-viscosity to medium-viscosity materials; the mixing efficiency is relatively low, and the mixing effect is limited for materials with high viscosity or large proportion difference; Disposable (some metal materials can be cleaned and reused) to avoid cross-contamination.
Static mixing tube
2. Technical characteristics of static mixing system
It is suitable for materials with low to medium viscosity and materials with great viscosity difference among components.
The influence of the back pressure on the mixing effect of the material is very small, and the mixing effect is excellent;
It is suitable for processing materials with a ratio of 100:100 ~ 100:10;
Double gas path control and valve core balance design are adopted, which is suitable for the mixer of two-component fluid.
It has a good suction function to ensure that the adhesive is broken quickly and cleanly;
The AB components are separately conveyed before being mixed, thereby avoiding the possibility of mixing in the conveying process;
In the process that the AB component fluid passes through the mixing unit in the mixing tube, the fluid is divided, sheared, rotated and converged for a plurality of times to achieve sufficient mixing effect;
The outlet of the mixing head adopts the standard interface of "Mixpac" mixing tube, which ensures the reliability and universality of installation;
A/B independent on-off valve is used for the static dispensing head. During the CMK test, adhesive A or adhesive B can be closed separately on the operation interface for single component test.
XETAR Static Mixing Schematic
II. Dynamic mixing
1. Introduction of dynamic mixing tube
Principle: external power (such as motor) is required to drive internal mixing elements (such as stirring paddle and rotor) to actively rotate, and material mixing is realized through forced shearing and stirring.
Structure: Including the power transmission device and the rotating mixing element. The mixing element can be designed according to the material characteristics (such as screw type, paddle type).
Features: High mixing efficiency, uniform effect, can handle materials with high viscosity and high proportion difference; can control the mixing degree by adjusting the rotating speed, with strong adaptability; complex structure, high cost, with moving parts, requiring regular maintenance; It is usually designed for reuse and is suitable for continuous production scenarios.
Dynamic mixing tube
2. Technical characteristics of dynamic mixing system
No matter large or small proportion blending or small proportion blending, or multi-component blending, the proportion precision can be ensured, and the mixing is uniform;
Has strong shearing effect on the fluid, and has comprehensive effects of shunting, stripping, coordinating, extruding, kneading and the like;
The mixing mode that the motor drives the metal stirring blade to rotate at a high speed has excellent mixing effect;
The rigidity of the blade is ensured, the service life is long, and the influence of the back pressure on the mixing effect of the material is reduced;
It is suitable for two-component materials with a ratio of 100:100 to 100:3;
Can operate that material with great difference in viscosity of each component, and is also suitable for the materials with short operation time;
The unique design can monitor the running state of the dynamic mixer in real time;
Stirring can be adjusted, the most highest speed can reach 3000 R/min, and the pressure of the mixing cavity is small.
XETAR Dynamic Mixing Diagram
Sum up
The static mixing tube is suitable for simple, low-viscosity scenarios by relying on the passive mixing of the fluid's own pressure, while the dynamic mixing tube is suitable for complex, high-viscosity or high-precision scenarios by actively rotating the forced mixing, with significant differences in cost, maintenance and scope of application. Our professional team will comprehensively and deeply analyze the diverse needs in your actual production, closely combine budget planning and strict quality standards, and customize the exclusive mixing process plan for you.