Since the summer, many pharmaceutical factories have asked about the related problems of special vibrating screening equipment for drugs. Since pharmaceuticals is a special industry and the main measures related to people's livelihood, it is sloppy, so there are specific standards in the production of related screening equipment. :
In the pharmaceutical process, it is necessary to screen the pulverized raw materials. After the pulverization of the drug, the particles are mostly uneven, and most of the materials need to be sieved by equipment. After the raw materials are pulverized, the particle size of the particles is not uniform, and it is necessary to perform sieving before mixing. In the pharmaceutical production process, the tool used for screening is a standard sieve. The vibrating screen for the pharmaceutical industry plays the role of screening to achieve the particle size of qualified materials in the screening of powders. It is a relatively special industry for the production of pharmaceuticals. All the powder shaker machines have relevant regulations in the pharmacopoeia. China's drug screening is made by Taylor's standard and the Chinese Pharmacopoeia standard. The Taylor standard is the name of the screen containing the sum of a hole diameter and a wire diameter (approximation number) plus the unit mesh per inch length, such as a sieve with a single hole diameter and a single wire diameter per inch length. It is called a 100 mesh sieve. The Chinese Pharmacopoeia stipulates a total of nine sieve numbers. The inner diameter of the sieve hole of the No. 1 sieve is large, and the inner diameter of the sieve of the No. 9 sieve is small.
The pore size of the screening machine used in the pharmaceutical industry is made with reference to the Chinese Pharmacopoeia. Common screening machines are circular vibrating sieving machines and electromagnetic vibrating sieving machines. The circular vibrating screen is equipped with two unbalanced weights on the drive shaft of the motor. The upper weight causes the horizontal movement of the mesh screen, and the lower weight causes the sand net to move vertically, thereby synthesizing the three-dimensional vibration of the screen. The material falls into the center of the screen. After screening, the coarse material on the screen surface is discharged from the outlet, and the sieved material is discharged from the lower outlet. The diameter of the screen is generally 0.4 to 0.5 meters, and each can be made of one to five layers of screen.
The electromagnetic vibration sieving machine is composed of an electromagnet, a screen, a frame, a spring contactor, etc., and generates vibration by using a high frequency and a small amplitude. A sliding rail is installed in the screen, and the sliding rail is mounted on the bracket, and an electromagnetic vibration device is supported on the frame of the screen to reciprocate the screen along the sliding rail. The material is added from the high end of the screen, and the coarse material is discharged from the lower port of the screen surface, and the material is discharged from the bottom of the screen. The machine has a high vibration frequency of 3,000 to 3,600 times per minute and a small amplitude of only 0.5 to 1, which can be used for sieving of viscous medicines, and has high screening efficiency.
In addition, in the food and pharmaceutical industries and other industries, the equipment hygiene requirements are higher, and there are also choices to use the airflow sieve to divide the raw material particles.
In the pharmaceutical process, it is necessary to screen the pulverized raw materials. After the pulverization of the drug, the particles are mostly uneven, and most of the materials need to be sieved by equipment. After the raw materials are pulverized, the particle size of the particles is not uniform, and it is necessary to perform sieving before mixing. In the pharmaceutical production process, the tool used for screening is a standard sieve. The vibrating screen for the pharmaceutical industry plays the role of screening to achieve the particle size of qualified materials in the screening of powders. It is a relatively special industry for the production of pharmaceuticals. All the powder shaker machines have relevant regulations in the pharmacopoeia. China's drug screening is made by Taylor's standard and the Chinese Pharmacopoeia standard. The Taylor standard is the name of the screen containing the sum of a hole diameter and a wire diameter (approximation number) plus the unit mesh per inch length, such as a sieve with a single hole diameter and a single wire diameter per inch length. It is called a 100 mesh sieve. The Chinese Pharmacopoeia stipulates a total of nine sieve numbers. The inner diameter of the sieve hole of the No. 1 sieve is large, and the inner diameter of the sieve of the No. 9 sieve is small.
The pore size of the screening machine used in the pharmaceutical industry is made with reference to the Chinese Pharmacopoeia. Common screening machines are circular vibrating sieving machines and electromagnetic vibrating sieving machines. The circular vibrating screen is equipped with two unbalanced weights on the drive shaft of the motor. The upper weight causes the horizontal movement of the mesh screen, and the lower weight causes the sand net to move vertically, thereby synthesizing the three-dimensional vibration of the screen. The material falls into the center of the screen. After screening, the coarse material on the screen surface is discharged from the outlet, and the sieved material is discharged from the lower outlet. The diameter of the screen is generally 0.4 to 0.5 meters, and each can be made of one to five layers of screen.
The electromagnetic vibration sieving machine is composed of an electromagnet, a screen, a frame, a spring contactor, etc., and generates vibration by using a high frequency and a small amplitude. A sliding rail is installed in the screen, and the sliding rail is mounted on the bracket, and an electromagnetic vibration device is supported on the frame of the screen to reciprocate the screen along the sliding rail. The material is added from the high end of the screen, and the coarse material is discharged from the lower port of the screen surface, and the material is discharged from the bottom of the screen. The machine has a high vibration frequency of 3,000 to 3,600 times per minute and a small amplitude of only 0.5 to 1, which can be used for sieving of viscous medicines, and has high screening efficiency.
In addition, in the food and pharmaceutical industries and other industries, the equipment hygiene requirements are higher, and there are also choices to use the airflow sieve to divide the raw material particles.
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