The application and structure of the dispersed grinding all-in-one machine

In the production process of coatings, for liquid materials containing powder aggregates, the material in the container needs to be pre-dispersed by a dispersing machine, and then the fully dispersed material is transported to the sander, grinding to the fineness required by the process. However, in this production process, it is necessary to set up lines, pumps and change containers, the whole operation process is more complex, low efficiency; Swap containers back and forth will produce a lot of material residues, resulting in waste of raw materials, increasing costs. At present, the existing basket grinder has a certain degree of dispersion capacity, but its dispersion and grinding is carried out on two devices, so it is not possible to achieve production automation, and the individual dispersion is less effective, can not guarantee product quality, especially for solid content or high viscosity of materials, if the direct use of basket grinding machine grinding, will not be able to achieve a better grinding effect, resulting in product quality can not meet the standards, so it is necessary to use a dispersion machine to pre-disperse
China
. At present, both pre-dispersed materials can be ground after the material coating production equipment, the application is not common. This study compares the traditional equipment of coating production with the dispersed grinding all-in-one machine, introduces the structure of the basket grinder, and discusses the feasibility of application.1 Principle Analysis
1. 1 Traditional equipment for coating production
In the production of coatings, the traditional process (as shown in Figure 1) pre-disperses the slurry with a separate disperser, after full mixing and dispersion, pumps it into the sander, grinds solid particles by the grinder, and stores them in a reserve container. If the fineness of the sanding does not meet the requirements, re-pump into the grinder and grind until the fineness meets the requirements.
Traditional process of coating production
Figure 1, dispersion machine 1 to container 2 to mix the material to be mixed, after full mixing and dispersion, the container 2 to the sander 4, from pump 3 to the sander 4. After grinding the grinding machine 4, it is sent to container 5 for storage. If the fineness does not meet the requirements, and then change the container 5 to container 2, after repeated grinding, after repeated grinding, the fineness of the material in the inspection container 5 reached the process requirements, stop grinding operation. At this point, the material in container 5 is a semi-finished coating.
the process is simple to operate, but more manual participation, labor intensity is greater. Frequent change of containers will produce a lot of material residues, resulting in waste of raw materials.
1. 2 Dispersed grinding all-in-one machine
scattered grinding all-in-one machine (as shown in Figure 2) changed the traditional coating production process, the dispersion and grinding 2 processes concentrated on 1 machine, simple and convenient operation, less waste, easy quality control, easy to achieve process automation.
a dispersed grinding all-in-one machine
a dispersed grinding all-in-one machine is used to grind small and extremely fine solid parts in a liquid phase state. The grinding process is divided into the following 4 steps.
(1) the material to be dispersed under the effect of a high-speed rotating dispersion disk, large particle aggregates (powder blocks) are dispersed, forming a small particle aggregate.
(2) stabilizes the initial particles, blocks, and polymers to prevent re-curing.
(3) The grinding basket is lowered to the working position, the material to be ground is sucked into the grinding basket, and the lever on the lever imperm is used to move the grinding beads at high speed to refine the material.
(4) material is discharged from the bottom of the grinding basket through a dense mesh plate.
can be seen from Figure 2, in the dispersion process, the dispersion disk 1 is in the working position, the grinding basket 2 is in the berthing position. At this point, the high-speed rotating dispersion plate 1 pre-disperses the material. During the grinding process, the grinding basket 2 and the dispersion plate 1 are in the working position at the same time, the material to be ground is sucked into the grinding basket, the lever 3 high-speed rotation, the grinding bead 4, the material grinding refinement, and then through the mesh plate 5, from the bottom of the grinding basket discharge. Dispersed grinding all-in-one machine will be dispersed and grinding 2 processes in 1 machine, 1 process to achieve, can also be used as a separate dispersing machine. Good grinding results can also be achieved for materials with high solid content and viscosity. The process is simple, takes less time, is efficient, has less residue, and is easy to clean and change color.2 Structure of the Dispersed Grinder
2. 1 Structure
structure of the Dispersed Grinding All-in-One is shown in Figure 3.
structure of the dispersed grinding all-in-one machine
hydraulic lifting scaffold 1: basic structure, consisting of a base, column, lift cylinder, beam, etc., other mechanisms are installed on it. Dispersion part 7: one of the working parts, as shown in Figure 3 (2), including active wheel 15, spindle 16, dispersion frame 17, lower clutch 20, dispersion disk 25, etc. Install a pair of bearings inside the dispersed frame to support the spindle; When the grinding part is in the parking position, only the dispersed parts work and the material is dispersed. Grinding part 8: one of the working parts, as shown in Figure 3 (3), including upper clutch 18, grinder frame 19, grinding basket 21, lever impedion 22, grinding beads 23, mesh plate 24 and so on; When the grinding part is in the working position, the grinding part grinds the material. Drivetrain 13: Provides power to dispersed or grounded components and transmits the momentum of the main motor to the dispersed components through a pair of pistes; According to the needs of the production process, when the equipment's 2 cylinders are breathable, push down so that the upper and lower clutches engage accurately, so that the momentum of the main motor is transmitted from the dispersed components to the grinding parts.
control system 14: control system, PLC controller and touch screen, precise control, simple operation, safe to use.
2. 2 Work
As shown in Figure 3 (2), the grinding part is in the parking position, at which point the grinding part does not come into contact with the material to be dispersed. Grinder rack 19 is not driven in this position. Pre-dispersion is carried out only by rotating the dispersing disk, the height of which can be adjusted to ensure suitable handling conditions. The ideal "doughn'an effect" in pre-dispersion can be achieved. The grinding part does not prevent the circulation of the material to be dispersed (indicated by an arrow) at this time, so that the dispersing disk can be pre-dispersed efficiently and quickly.
As shown in Figure 3 (3), the two cylinders are air-breathed to push the upper clutch 18 and the lower clutch 20 to engage accurately, thus the dispersed components are driven by the clutch to rotate the grinding part; Grinder frame 19 rotates the lever imperfle 22 relative to the grinding basket 21. The lever imperm 22 makes the grinding bead 23 in motion, thereby grinding the material in the grinding basket. The lower part of the grinding basket is installed net plate 24, when the dispersion plate 25 is in high-speed rotation, the role of centrifugal force makes the center of the dispersing disk produce negative pressure, the refined material in the grinding basket is sucked out through the net plate; Through this cycle, flow process, the material is finely dispersed and ground.3 Conclusion
Decentralized grinding all-in-one machine has the advantages of decentralized machine and basket grinder, is an organic combination of the two kinds of equipment, and has a small investment, high degree of automation, simple control, good safety, environmentally friendly and so on, suitable for industrial production.
In recent years, the dispersed grinding all-in-one machine is suitable for mixing and grinding solid particles and liquid, and its application in coating production has received some attention, and has achieved certain economic and social benefits, and is expected to be extended to other industries other than coatings.