Dry granulator is dry granulation equipment of China's absorption of foreign advanced powder granulation technology and development, and to improve on the basis of foreign technique, structure more reasonable and compact structure, simple process, convenient operation, good performance. Powder materials by this equipment, uniform particle products without adding any binder can be made directly to the user needs, the particle density, there is no need for subsequent processing, reduce the process, not only reduce the granulation cost, and reduced dust pollution, improve labor environment.
Dry granulating machine hopper material, the stirrer to stir, the exclusion of air at the same time, stable horizontal feeder feeding. The material into the horizontal feeder, in the rotating screw drive, make the material gradually degassing in forward process, and will increase the density of material after the forced into tablet machine. Press the high density material feeder conveyor, roller by a pair of hydraulic oil cylinder to drive the material, the rolling into thin slices, and again complete degassing work. Rolling good sheet after shearing crusher cutter machine, cut into easy to whole grain fragments into the granulator. Fragmentation is whole grain knife forced extrusion plate. Extrusion of the particles can be obtained by sieving, customer required size of products. Thus, completed the whole process of granulation.
Dry granulating machine design into two large pieces inside the body and the operation panel Work Department, all driving parts and auxiliary facilities design in the interior of the body, in contact with the material work part is arranged on the operation panel, the middle has multiple sealing isolation, work is work in a completely sealed state, and all contact with the material parts easy disassembly and cleaning, effectively prevent dust leakage, reducing the possibility of contamination, reduce the cleaning area, fully meet the requirement of pharmaceutical production GMP.
According to introduction, dry granulating machine compared with the traditional wet granulation, the powder material is made of granular products directly meet the requirements of the user, without any intermediate and additive, granulating uniform product size, bulk density increased significantly, not only to control pollution, but also reduce the powder material and energy waste, improve material appearance and mobility, easy storage and transport, can control the solubility, porosity and specific surface area and so many advantages, especially suitable for wet mixing and granulating, step boiling granulating can not work materials.
The work principle of granulator:
According to the mechanical principle of extrusion granulating process, will be configured with a certain amount of crystal water, dry powder or fine crystalline materials, extrusion into thin slices, then made a required size of particles. The raw material into the hopper, feeding screw adjusting oil cylinder by pressure, which form a pre pressure. The conveyor feed screw and compression (powder density increases exponentially, pushed to two squeeze rollers bite angle.
The horizontal roller, the material extruded into sheet, according to the press roller material characteristics of the choice of different surface shapes (such as: smooth, pattern) velocity and pressure roller (roller material and residence time by the roller speed dependent).
Pressure device of linear transfer to the pressure roller materials needed, hydraulic device can keep certain pressure, can ensure the density of material consistency parallel roller arrangement.
According to the different requirements of the particles, equipment granulation system screen mesh size can be changed.
Dry granulating machine technology, innovation is a strategy of granulation technology, in the use of high pressure granulating method for the granulation process, the powder is by applying external force and pressed into dense state in limited space. Produce a stable gathering force floc bridging force, low viscosity liquid adhesive force, surface tension and mutual attraction. Reunion operation success or not, depends on the one hand on the effective use of applied force and transfer, physical properties, on the other hand also depends on the particle material.
Particle shape refers to a grain boundary or each point on the surface of the image. Particle shape directly affect other properties of powders, such as liquidity, filling and so on, but also directly behavior and particles in mixing, storage, transport, sintering and other units in the process of the relevant. Engineering, according to a different purpose, people shape on the particles have different requirements. For example: high speed dry pressing method tile green powder, requirements during mold filling fast, smooth exhaust, the spherical particle is appropriate; concrete aggregate is filled with high structural strength and tight, so the stone shape hope is a regular polyhedron. In turn, particle shape because of different formation process and different, for example, sheet products simple swing type jaw crusher the opportunity to produce more; powder prepared by spray drying is more spherical particles. Therefore, to describe the various particle shapes need quantitative, to show the difference between.
On the other hand, in theoretical research and industrial practice, if often irregularly shaped particles were spherical, in order to facilitate the calculation of particle size, the experimental results also easy to reproduce. Because of this, thus becoming the theoretical calculation and the actual situation in and out of one of the main causes of great. So the general coefficient multiplied by the relevant theoretical formula of particle size in the shape of said modified.
Dry granulating machine advantages:
The raw material powder made of granular products directly meet user requirements, without any intermediate and additive, granulating uniform product size, bulk density increased significantly, improve the liquidity, which control the dust, but also reduce the waste of powder, and is convenient for storage and transportation, can control the solubility, and the specific surface area and pore green.
The scope of application:
Pharmaceutical industry produce medicine by particles, with particle prescription, antibiotic capsules filled with particles, anti biomass direct hit by particle, animal medicinal granule, powder dialysis preparation;
The food industry a condiment and spicy condiment with particles, snacks made of particles, health food particles;
Chemical industry and other cosmetics, pesticide, chemical industry and drug, animal feed, detergent. |
