Modification device for producing modified silica powder

Abstract

A modification device for producing modified silica powder comprises a semi-finished product bin (1), a first spiral reamer (2), a high-speed mixer (3), a medicament barrel (4), a cooling cylinder (5), an ultrasonic vibration screening machine (6), a Roots blower (7), a cloth bag collector (8), a second spiral reamer (9), a packaging machine (10), a medicament sprayer (11), a stirring paddle (12), a base (13), an ultrasonic generator (14), a transducer (15), a motor (16) and a screen (17). According to the device, the ultrasonic vibration screening machine is arranged, ultrasonic vibration is adopted, the screening efficiency is high, net blocking is avoided, and the screening precision is high; the ultrafine modified silica powder is less in agglomeration and good in dispersing performance.

Description

Technical Field

[0001] This utility model relates to a modification device for producing modified silicon micropowder, belonging to the technical field of silicon micropowder production equipment. Background Technology

[0002] Silica powder is a non-toxic, odorless, and pollution-free inorganic non-metallic material with excellent properties such as good temperature resistance, acid and alkali corrosion resistance, high thermal conductivity, high insulation, low expansion, chemical stability, and high hardness. It is widely used in chemical, electronics, integrated circuit (IC) manufacturing, electrical appliances, plastics, coatings, high-grade paints, rubber, and defense industries. Silica powder has demonstrated enormous market potential and space. For example, epoxy potting compounds made with silica powder in electronics and electrical appliances exhibit excellent insulation, heat dissipation, and low shrinkage.

[0003] However, silica powder is an inorganic material, while epoxy resin is an organic polymer. The two have poor compatibility, resulting in poor dispersion and high viscosity. Therefore, surface modification of the silica powder is necessary. However, uneven coating often occurs during modification, leading to powder agglomeration and the formation of coarse particles. This negatively impacts the effectiveness of the modified powder. Therefore, it is crucial not only to modify the silica powder but also to address the issue of powder particle size. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of uneven coating and powder agglomeration resulting in coarse particles in traditional surface modification treatment of silicon micropowder, and to propose a modification device for producing modified silicon micropowder.

[0005] The technical solution of this utility model is as follows: a modification device for producing modified silicon micropowder, including a semi-finished product silo, a spiral cutter, a high-speed mixer, a reagent tank, a cooling cylinder, a Roots blower, a bag collector and a packaging machine, and also including an ultrasonic vibrating sieve, an ultrasonic generator and a transducer.

[0006] The spiral reamer includes a first spiral reamer and a second spiral reamer.

[0007] The bottom outlet of the semi-finished product silo is connected to the input end of the first spiral reamer; the output end of the first spiral reamer is connected to the feed inlet at the top of the high-speed mixer; the top of the high-speed mixer is connected to the reagent tank through a pipe; the outlet at the bottom of the high-speed mixer is connected to the feed inlet at the top of the cooling cylinder; the outlet at the bottom of the cooling cylinder is connected to the feed inlet at the top of the ultrasonic vibrating screen; the outlet at the bottom of the ultrasonic vibrating screen is connected to the Roots blower and the bag collector respectively; the outlet at the bottom of the bag collector is connected to the packaging machine through the second spiral reamer.

[0008] The ultrasonic vibrating screen is equipped with a screen and a transducer at a horizontal position in the middle of the machine, and an ultrasonic generator is installed on the periphery of the machine.

[0009] The high-speed mixer is equipped with a stirring paddle and a drive shaft at the bottom, and the motor drives the drive shaft and stirring paddle to rotate at high speed through a pulley.

[0010] The bottom of the cooling cylinder is equipped with a low-speed rotating stirring blade, and the cylinder wall jacket is equipped with water circulation cooling.

[0011] The beneficial effects of this invention are that the device, by incorporating an ultrasonic vibrating sieve, achieves high sieving efficiency, prevents screen clogging, and ensures high sieving accuracy; the ultrafine modified silica powder exhibits less agglomeration and better dispersion performance. The device employs a simple process, is highly practical, suitable for the modification of most non-metallic powders, and is easy to install and operate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the device of this utility model;

[0013] In the diagram, 1 is the semi-finished product warehouse; 2 is the first spiral cutter; 3 is the high-speed mixer; 4 is the reagent tank; 5 is the cooling cylinder; 6 is the ultrasonic vibrating screen; 7 is the Roots blower; 8 is the bag collector; 9 is the second spiral cutter; 10 is the packaging machine; 11 is the sprayer; 12 is the agitator; 13 is the base; 14 is the ultrasonic generator; 15 is the transducer; 16 is the motor; and 17 is the screen. Detailed Implementation

[0014] The specific embodiments of this utility model are as follows: Figure 1 As shown.

[0015] This embodiment discloses a modification device for producing modified silicon micropowder, comprising a semi-finished product silo 1, a first spiral cutter 2, a high-speed mixer 3, a reagent tank 4, a cooling cylinder 5, an ultrasonic vibrating sieve 6, a Roots blower 7, a bag collector 8, a second spiral cutter 9, a packaging machine 10, a sprayer 11, a stirring paddle 12, a base 13, an ultrasonic generator 14, a transducer 15, a motor 16, and a screen 17.

[0016] In this embodiment, the bottom of the semi-finished product silo 1 is provided with a horizontally installed first spiral cutter 2. The ultrafine silicon powder in the semi-finished product silo 1 is conveyed to the high-speed mixer 3 through the first spiral cutter 2. The mixture is stirred and mixed at high speed in the high-speed mixer 3. After being heated to a certain temperature, the modifier in the reagent tank 4 is quantitatively sprayed into the high-speed mixer 3 through the sprayer 11. The modifier and the ultrafine silicon powder are mixed at high speed and coated on the surface of the silicon powder.

[0017] In this embodiment, the high-speed mixer 3 is mounted on the base 13. The bottom of the high-speed mixer 3 is provided with a stirring paddle 12 and a drive shaft. The motor 16 drives the driven wheel and drive shaft inside the base through a pulley, thereby driving the stirring paddle 12 to rotate at high speed. The outlet of the high-speed mixer 3 is connected to the cooling cylinder 5.

[0018] In this embodiment, the cooling cylinder 5 is installed on the base. The bottom of the cooling cylinder 5 is provided with a low-speed rotating stirring blade, which is driven to rotate by a motor with a gearbox located in the base. The cooling cylinder 5 is provided with water circulation cooling in the sleeve of the cylinder wall. The discharge port at the bottom of the cooling cylinder 5 is connected to an ultrasonic vibrating sieve 6.

[0019] In this embodiment, the ultrasonic vibrating sieve 6 is connected to the ultrasonic generator 14 via a power supply. The ultrasonic vibrating sieve 6 has a screen 17 and a transducer 15 in the middle inside. The bottom discharge port is connected to the Roots blower 7 and the bag collector 8 via an air duct.

[0020] In this embodiment, the Roots blower 7 uses air pressure to transport the well-dispersed ultrafine modified silicon powder screened by the ultrasonic vibrating sieve powder machine 6 to the bag collector 8; a second spiral cutter 9 is installed at the bottom horizontal position of the bag collector 8, and the finished product is sent to the packaging machine through the second spiral cutter 9.

[0021] In this embodiment, a high-frequency, low-amplitude ultrasonic vibration wave is superimposed on the screen 17 of the ultrasonic vibrating sieve 6. The ultrafine modified silicon powder receives a huge ultrasonic acceleration, which keeps the material on the screen surface in a suspended state, thereby suppressing screen clogging factors such as adhesion, friction, settling, and wedging, thus solving the sieving problems such as strong adsorption, easy agglomeration, and high static electricity.

[0022] The process flow of this embodiment is as follows: The ultrafine silicon powder in the semi-finished product silo 1 is conveyed to the high-speed mixer 3 through the first spiral cutter 2 and stirred at high speed. After reaching the modification temperature, the modifier is quantitatively sprayed into the agent tank 4 through the sprayer 11. The modifier and ultrafine silicon powder are mixed at high speed and form a coating on the surface of the silicon powder. After modification for a certain period of time, the modified ultrafine silicon powder enters the cooling cylinder 5 through the discharge port for cooling. After cooling, it enters the ultrasonic vibrating powder screen 6 through the discharge port for screening. The well dispersed fine powder is blown by the Roots blower 7 through the screen 17 to the bag collector 8. Finally, it is conveyed to the packaging machine 10 through the second spiral cutter 9 for packaging. The screened coarse particles are collected and recycled through the recycling bag.

Claims

1. A modification apparatus for producing modified silica micropowder, comprising a semi-finished product silo, a spiral cutter, a high-speed mixer, a reagent tank, a cooling cylinder, a Roots blower, a bag collector, and a packaging machine, characterized in that, The device also includes an ultrasonic vibrating screen, an ultrasonic generator, and a transducer; the spiral reamer includes a first spiral reamer and a second spiral reamer; the bottom outlet of the semi-finished product bin is connected to the input end of the first spiral reamer; the output end of the first spiral reamer is connected to the inlet at the top of the high-speed mixer; the top of the high-speed mixer is connected to a reagent tank via a pipe; the outlet at the bottom of the high-speed mixer is connected to the inlet at the top of the cooling cylinder; the outlet at the bottom of the cooling cylinder is connected to the inlet at the top of the ultrasonic vibrating screen; the outlet at the bottom of the ultrasonic vibrating screen is connected to a Roots blower and a bag collector respectively; the outlet at the bottom of the bag collector is connected to a packaging machine via the second spiral reamer; The ultrasonic vibrating screen is equipped with a screen and a transducer at a horizontal position in the middle of the machine, and an ultrasonic generator is installed on the periphery of the machine.

2. The modification apparatus for producing modified silicon micropowder according to claim 1, characterized in that, The high-speed mixer is equipped with a stirring paddle and a drive shaft at the bottom, and the motor drives the drive shaft and stirring paddle to rotate at high speed through a pulley.

3. The modification apparatus for producing modified silicon micropowder according to claim 1, characterized in that, The bottom of the cooling cylinder is equipped with a low-speed rotating stirring blade, and the cylinder wall jacket is equipped with water circulation cooling.

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