Cylindrical Granular Explosives Screening Method

Abstract

The invention discloses a method for screening cylindrical granular pyrotechnics, which is suitable for pyrotechnics pellets obtained through extrusion and pelletizing processes. The specific steps are as follows: step 1, confirming the morphological characteristics of the pellets; step 2 1. Select the appropriate screen and mesh size; Step 3, separate the long medicine particles; Step 4, separate the powder and complete the screening. The screen frame is made of stainless steel or high-strength aluminum alloy to reduce the weight of the equipment and improve operability. Choose metal wire plain weave square hole mesh, the percentage of mesh surface screening area is relatively high, at the same time, the contact area between medicine particles and mesh surface is small, the working resistance is small, easy to sieve, and the material source is wide and the cost is low.

Description

technical field

[0001] The invention belongs to the technical field of pyrotechnic drug screening and relates to a method for screening cylindrical granular pyrotechnic drugs. Background technique

[0002] In the passive safety protection mechanism of automobiles, the gas generator needs to complete the predetermined function by means of the combustion of pyrotechnic agents, which requires that such special pyrotechnic agents must have specific combustion characteristics, and the combustion characteristics are closely related to their external dimensions. relation. Therefore, how to ensure the consistency of the external dimensions of the pharmaceutical particles is particularly important. In addition, in order to meet the assembly requirements, it is a basic requirement for the pharmaceutical particles to have good fluidity, and this requirement is also closely related to the external dimensions.

[0003] The pyrotechnic agent involved in the present invention is generally...