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Granularity sorting method for epoxy molding compound powder material

A powder and sorting technology, used in grain processing and other directions, can solve the problems of difficulty in controlling density and weight, heavy environmental pollution at the production site, and large particle size distribution and dispersion, and reduce the generation of large particles and dust. Reasonable and good powder fluidity

Active Publication Date: 2013-02-27
灌云县瑞聚电子商务商行
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production of epoxy molding compound, the material is extruded through the extruder after cross-linking reaction, after being calendered and quickly cooled, it forms a thin sheet, and then enters the pulverizer to be crushed into a mixed state of granules and powder. The existing equipment and process configuration are Using a hammer mill, the particle size is controlled by the screen aperture of the crusher, and the crushed material enters the silo for collection. The particle size distribution of the crushed material in this method is highly dispersed. When using a larger aperture screen, the particle size of the material If it is too thick, it will be difficult to control the density and weight when making cakes later. When using a screen with a smaller aperture, the powder of the material will increase and the fluidity will be poor, which will easily form bridges in the system, and the powder will pollute the environment of the production site heavily, which is not conducive to employee health

Method used

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  • Granularity sorting method for epoxy molding compound powder material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a method for particle size separation of epoxy molding compound powder, the steps are as follows:

[0018] First put the material into the first-stage hammer mill 1 for crushing. The screen aperture of the first-stage hammer mill 1 is 3.5-6 mm, and the speed is 1200-2600 rpm; the crushed material enters the double The mesh size of the double-layer sorting sieve is 8-16 mesh, and the included angle of the vibrating hammer in the double-layer sorting sieve is 30-75°; the fine-grained powder passes through the double-layer sorting The sieved screen enters the collector from the outlet of the lower layer;

[0019] Coarse particle powder is screened out by double-layer sorting, and enters the second-stage hammer mill for re-grinding. The sieve diameter of the second-stage hammer mill is 2-3 mm, and the speed is 1200-2600 rpm. The crushed powder directly enters the collector.

Embodiment 2

[0020] Embodiment 2, a method for particle size separation of epoxy molding compound powder, the steps are as follows:

[0021] First put the material into the first-stage hammer mill 1 for crushing. The screen aperture of the first-stage hammer mill 1 is 3.5 mm, and the speed is 2000 rpm; the crushed material enters the double-layer sorting Sieve 2 is sorted, and the screen mesh number of double-layer sorting sieve 2 is 15 orders, and the included angle of the vibrating hammer in double-layer sorting sieve 2 is 40 °; The screen enters the collector from the outlet of the lower layer;

[0022] Coarse particle powder is selected by double-layer sorting sieve 2, enters in secondary hammer mill 3 and pulverizes again, and the sieve aperture of secondary hammer mill 3 is 2mm, and the rotating speed is 2000 rpm, The pulverized powder directly enters the collector 4.

Embodiment 3

[0023] Embodiment 3, a method for particle size separation of epoxy molding compound powder, the steps are as follows:

[0024] First put the material into the first-stage hammer mill 1 for crushing. The screen aperture of the first-stage hammer mill 1 is 5 mm, and the speed is 2200 rpm; the crushed material enters the double-layer sorting screen 2 for sorting, the mesh number of the double-layer sorting sieve 2 is 10 orders, and the included angle of the vibrating hammer in the double-layer sorting sieve 2 is 50°; The net enters into the collector 4 from its lower floor outlet;

[0025] The coarse particle powder is selected by the double-layer sorting sieve 2, and enters the secondary hammer mill 3 for further pulverization. The screen aperture of the secondary hammer mill 3 is 3 mm, and the rotating speed is 2200 rpm. The pulverized powder directly enters the collector 4.

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Abstract

The invention discloses a granularity sorting method for an epoxy molding compound powder material. The method comprises the following steps of: smashing the material through a first-stage hammer type smashing machine, sorting the smashed material in a double-layer sorting sieve, and pouring the fine powder material into a collector from a material outlet at the lower layer through a screen of the double-layer sorting sieve; and screening out rough powder material through the double-layer sorting sieve, smashing the rough powder material again in a two-stage hammer type smashing machine, and directly putting the smashed powder material into the collector. The smashing method is rational and high in operability; the material is smashed twice; moreover, a smashing machine screen and a sorting sieve screen which have different mesh size are adopted, so that powder materials in different granularity distribution ranges can be obtained; the granularity of the powder material is well controlled; the production efficiency is high; the material during production is high in powder flowability, so that a bridge is difficultly formed in a system; large particles and dust can be reduced; and the field working environment is improved.

Description

technical field [0001] The invention relates to a powder particle size separation method, in particular to a powder particle size separation method for epoxy molding compound. Background technique [0002] In the production of epoxy molding compound, the material is extruded through the extruder after cross-linking reaction, after being calendered and quickly cooled, it forms a thin sheet, and then enters the pulverizer to be crushed into a mixed state of granules and powder. The existing equipment and process configuration are Using a hammer mill, the particle size is controlled by the screen aperture of the crusher, and the crushed material enters the silo for collection. The particle size distribution of the crushed material in this method is highly dispersed. When using a larger aperture screen, the particle size of the material If it is too thick, it will be difficult to control the density and weight when making cakes later. When using a screen with a smaller aperture,...

Claims

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Application Information

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IPC IPC(8): B02C13/284B02C21/00B29B9/04B29B9/16
Inventor 刘连兵朱平彦张文金
Owner 灌云县瑞聚电子商务商行
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