1. Feed machinery and equipment accessories ring mold product introduction
In the process of feed production and processing, ring die is the core part of pelletizing machine, and its performance directly affects the quality, production efficiency and production cost of feed particles. A high-quality ring mold ensures that the feed particles have the right hardness, density, appearance and durability to meet the feeding needs of different animals.
2. Structure of ring die
The ring die is usually cylindrical and consists of an inner hole, an outer circle, a end face and a die hole. The inner hole is used to install on the main shaft of the granulator and realize synchronous rotation with the main shaft through key connection; The outer circle is the supporting part of the ring mold, which is matched with the body of the granulator; The end face is generally provided with a feed port and a scraping device. The feed port is used to evenly feed the tempered powder feed into the inner part of the ring die, and the scraping device can prevent the accumulation of materials on the end face. The mold hole is the most important structural feature of the ring mold, and its shape, size and arrangement directly determine the shape, size and yield of feed particles. Common mold hole shapes are round, square, triangle, etc., and different shapes of mold holes are suitable for different types of feed and animals.
3. Material of ring die
In order to meet the requirements of the ring die in terms of high strength, high wear resistance and corrosion resistance, its material is generally selected high-quality alloy steel or stainless steel. Alloy steel has a high hardness and strength, can withstand the great pressure and friction in the pelleting process, the common alloy steel materials are 20CrMnTi, 40Cr and so on. Stainless steel has good corrosion resistance and is suitable for working environments with wet or corrosive media, such as the production of aquatic feed. When selecting the material of the ring mold, it is necessary to comprehensively consider factors such as the type of feed, production process and working environment to ensure that the ring mold has good service life and performance.
4. Manufacturing process of ring die
Forging: Through the forging process can improve the structure of the ring mold, improve its strength and toughness. After forging, the blank of the ring die needs to be annealed to eliminate the forging stress and prepare for the subsequent processing.
Machining: including turning, milling, drilling and other processes, used to process the inner hole, outer circle, end face and die hole and other parts of the ring die. When machining the die hole, it is necessary to use high-precision processing equipment and tools to ensure that the dimensional accuracy, shape accuracy and surface roughness of the die hole meet the requirements.
Heat treatment: Heat treatment is a key process to improve the hardness and wear resistance of the ring die. The common heat treatment processes are quenching and tempering, through reasonable control of heat treatment process parameters, can make the ring mold to obtain the ideal hardness and toughness match. For example, for alloy steel ring dies, the quenching temperature is generally between 850-900 ° C, and the tempering temperature is between 400-600 ° C.
Surface treatment: In order to further improve the wear resistance and corrosion resistance of the ring die, it can be surface treated. Such as nitriding treatment, chromium plating treatment, etc., nitriding treatment can form a nitriding layer with high hardness and good wear resistance on the surface of the ring die, and chromium plating treatment can improve the corrosion resistance and finish of the ring die.
5. Performance characteristics of ring die
High precision: The high-quality ring mold has the exact size and shape of the die hole, which can ensure the size consistency and appearance quality of the feed particles. For example, for the production of pig feed ring mold, the particle diameter error can be controlled within ±0.1mm.
High wear resistance: Due to the frequent friction between the ring die and the material and the press roller during the pelleting process, high wear resistance is required. Using high-quality materials and advanced manufacturing processes to produce the ring mold, its service life than the ordinary ring mold increased by 30%-50%.
Good air permeability: the design of the ring die hole should ensure good air permeability in the granulation process, so that the gas generated in the compression process of the material can be smoothly discharged, otherwise it will lead to quality problems such as cracks and porosity of the particles. Generally, the parameters such as length, diameter and taper of die holes can be reasonably designed to achieve good air permeability.
High strength: can withstand high pressure in the granulation process, not easy to deformation and damage. For example, in the production of high-density aquatic feed, the ring mold needs to withstand pressure of up to 100-150MPa, and the high-quality ring mold can run stably to ensure the continuity of production.
6. Application range of ring die
Ring mold is widely used in the production of various animal feed, including livestock feed (such as pig feed, chicken feed, cattle feed, etc.), aquatic feed, pet feed, etc. Different types of feed have different requirements for the ring mold, for example, livestock feed generally requires moderate particle size and appropriate hardness, aquatic feed requires particles with higher density and water resistance, pet feed may pay more attention to the shape and taste of the particles. Therefore, in the selection of ring mold, it is necessary to carry out targeted selection according to the type of feed and production process.
7. FAQ
Q: What is the main material of the ring mold?
A: Ring molds are usually made of high-strength wear-resistant materials, such as alloy steel or stainless steel. These materials are able to withstand wear and pressure under high loads, extending service life and increasing productivity.
Q: How to choose the right ring die aperture?
A: The selection of ring mold aperture should be determined according to the size of the feed particles required. Different kinds of feed require different particle sizes, so too small aperture will lead to feed clogging, and too large aperture will affect the quality and uniformity of feed particles.
Q: How does the thickness of the ring mold affect its performance?
A: The thickness of the ring die directly affects its durability and pressure resistance. Thicker ring molds are better able to resist wear and deformation, but they also increase manufacturing costs. Therefore, it is necessary to find a balance between intensity and cost.
Q: What heat treatment processes are required in the production process of ring molds?
A: Heat treatment processes such as quenching, tempering and surface hardening are required in the production process of ring molds to improve their hardness and wear resistance. These processes can significantly increase the service life of the ring die.
Q: How long is the cycle of ring mold replacement?
A: The cycle of ring mold replacement depends on the frequency of use, the type of feed and the operation of the equipment. In general, when it is found that the particle quality is reduced or the yield is reduced, it is necessary to consider replacing the ring mold. Regular recording of usage helps determine the best time to change.
Q: What are the common faults of ring modes?
A: Common failures of ring molds include clogging, wear and cracking. Clogging is usually caused by high feed humidity or improper aperture design; Wear is a normal phenomenon caused by long-term use; Cracking may be due to material defects or improper handling.
Q: How to optimize the ring mold design to improve production efficiency?
A: In order to improve production efficiency and product quality, the particle uniformity and yield can be improved by improving the aperture layout and increasing the number of holes; The use of new materials and surface treatment technology can enhance the wear resistance and corrosion resistance of the ring die.
Q: What should we pay attention to in the process of using the ring mold?
A: When using the ring mold, attention should be paid to controlling the humidity and temperature of the feed to avoid being too high or too low; Check the wear condition of the ring die regularly and replace the damaged part in time; Avoid continuous operation for a long time, so as not to overheat resulting in deformation or damage to the ring die.
