CN218799119U - A kind of preparation device of flake silver powder for HJT silver paste - Google Patents

Abstract

The utility model discloses a preparation device of flake silver powder for HJT silver paste, which comprises an automatic feeding funnel, a switch valve, a stirring system, a temperature measuring instrument, a pressure monitoring instrument, a stirring tank body, a pneumatic diaphragm pump, and an ice water machine , switch valve and discharge valve. The preparation device is designed according to the production process of flake silver powder for HJT silver paste, which ensures convenient operation and reliable operation, and greatly reduces the adverse phenomena such as excessive pressure, uneven ball milling, and sequins caused by overheating in the ball milling process of flake silver powder. The process, quality and yield of the production and preparation of flake silver powder for HJT silver paste have been greatly improved.

Description

A kind of preparation device of flake silver powder for HJT silver paste

technical field

The utility model relates to the technical field of nano-micron-level metal powder material preparation, in particular to a preparation device for flaky silver powder for HJT silver paste.

Background technique

At present, in the preparation process of flake silver powder, it is mainly by manually adding materials, grinding balls, ball milling solvents and dispersants to the horizontal ball mill, and the solid-liquid of the grinding balls and silver powder slurry and slurry is almost manually performed during the powder extraction process. Separation, the whole process cycle is long, the yield is low, and the amount of silver loss is large.

The horizontal ball mill cannot guarantee the uniform collision and shearing motion between the ball and the silver powder particles during the ball milling process. At the same time, there may be local overheating during the ball milling process, which may cause cold welding, sequins and other undesirable phenomena.

Utility model content

The purpose of this utility model is to provide a preparation device for flake silver powder for HJT silver paste according to the deficiencies of the prior art.

The technical solution adopted by the utility model to solve the technical problems is: a preparation device for flake silver powder for HJT silver paste, including a stirring tank and a stirring system, and the stirring tank includes a stirring tank body and a mixing tank barrel The external jacket, the stirring system includes a stirring motor inverted at the top opening of the stirring tank body, the stirring tank body is provided with stirring propeller blades, the stirring propeller blades are connected to the stirring motor through a reducer, and the stirring tank barrel The top of the body is connected to the feeding pipe through the feeding switch valve. The feeding pipe is provided with an automatic feeding funnel, and the original silver powder of the ball mill is supplied to the mixing tank through the automatic feeding funnel. The upper and lower side walls of the mixing tank body pass through the feeding pipe The discharge pipe is connected to the pneumatic diaphragm pump, and the ground material slurry is sent to the mixing tank barrel reciprocatingly through the pneumatic diaphragm pump. The circulating cooling water is supplied by the air-cooled chiller, and the bottom of the mixing tank is connected to the discharge valve through the discharge switch valve.

The preparation device for flake silver powder for HJT silver paste, the top of the stirring tank is provided with a feeding cover, the speed reducer and the feeding switch valve are arranged on the feeding cover, and the feeding cover is also provided with a feeding hole, a pressure monitoring instruments and thermometers.

The preparation device for flake silver powder for a kind of HJT silver paste also includes a PLC controller, and the PLC controller is respectively connected to an automatic feeding funnel, a stirring system, a pressure monitor, a thermometer, and a discharge switch valve , feeding switch valve, pneumatic diaphragm pump and air-cooled chiller.

The preparation device of flake silver powder for a kind of HJT silver paste, its air-cooled ice water machine is made up of water tank type evaporator, compressor, radiator and cooling fan, and described water tank type evaporator is circulated through The water pump is connected to the outlet pipe.

In the preparation device of flake silver powder for HJT silver paste, the inner wall of the stirring tank is provided with a stainless steel filter screen.

The beneficial effects of the utility model are: there is no intermediate product transfer in the process of the device, and it is carried out in a closed system with a high degree of automation, which reduces the instability of product quality and labor costs caused by the interference of artificial factors to the greatest extent, and greatly reduces the cost. It reduces the adverse phenomena such as overheating, excessive pressure, uneven ball milling, and sequins during the ball milling of flake silver powder, and greatly improves the process, quality and yield of the production and preparation of flake silver powder for HJT silver paste.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the internal state during stirring ball milling.

The reference signs are: a—automatic feeding funnel, b—stirring system, c—stirring tank barrel, d—stirring propeller blade, e—pressure monitor, f—thermometer, g—discharging switch valve, h—feeding switch valve, i—pneumatic diaphragm pump, j—air-cooled chiller, k—discharging valve, l—reducer, m—feeding hole, 11—water tank evaporator, 12—compressor, 13—radiator, 14—cooling fan, 15—circulating water pump.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Referring to Fig. 1, a preparation device for flake silver powder for HJT silver paste disclosed by the utility model includes a stirring tank c and a stirring system b. The jacket outside the barrel c, the stirring system b includes a stirring motor inverted at the top opening of the barrel c of the stirring tank, the stirring propeller blade d is arranged in the barrel c of the stirring tank, and the stirring propeller blade d passes through The reducer l is connected to the stirring motor, and the top of the barrel c of the stirring tank is connected to the feeding pipe through the feeding switch valve h. The feeding pipe is provided with an automatic feeding funnel a, through which the raw material of the ball mill is supplied to the stirring tank. Silver powder, the upper and lower side walls of the mixing tank body c are respectively connected to the pneumatic diaphragm pump i through the feed pipe and the discharge pipe, and the ground material slurry is sent to the mixing tank body c reciprocatingly through the pneumatic diaphragm pump i, and the upper and lower side walls of the jacket The air-cooled chiller j is connected to the water outlet pipe and the water inlet pipe respectively. The jacket layer is supplied with circulating cooling water by the air-cooled chiller j. The bottom of the stirring tank c is connected to the discharge valve k through the discharge switch valve g. The top of the stirring tank c is provided with a feeding cover, the speed reducer 1 and the feeding switch valve h are arranged on the feeding cover, and the feeding cover is also provided with a feeding hole m, a pressure monitor e and a thermometer f.

When preparing flake silver powder for HJT silver paste in the specific production process of the utility model, add a certain amount of grinding balls with a certain ball-to-material ratio in the mixing tank barrel c, add a certain amount of original silver powder into the automatic feeding funnel a, and then pass the feeding Add a certain amount of ball milling solvent and dispersant solution to hole m, and then fully stir evenly at a certain speed through the stirring system b, turn on the air-cooled ice water machine j to supply circulating cooling water at a certain temperature in the jacket of the mixing barrel, and then turn on the pneumatic Diaphragm pump i circulates the silver powder slurry, so that there is a relatively uniform collision and shearing motion between the grinding ball and the silver powder particles, thereby grinding the silver powder particles. The thermometer f and pressure monitor e in the barrel c of the mixing tank can monitor the temperature and pressure changes of the system in real time during the preparation process, and eliminate the instability of product quality caused by the interference of artificial factors to the greatest extent. The entire flaky silver powder The preparation process has strong adaptability and high efficiency, and is suitable for micron-scale grinding of flake metal and metal mixed powder. It is easy to use, has accurate mass production reproducibility, and is very suitable for batch production.

The device also includes a PLC controller, and the PLC controller is respectively connected to the automatic feeding funnel a, the stirring system b, the pressure monitor e, the temperature measuring instrument f, the discharge switch valve g, the feed switch valve h, and the pneumatic diaphragm pump i and air-cooled ice water machine j; through the automatic control system based on PLC controller, the speed of adding the original silver powder can be controlled, reducing the loss of silver powder and dust caused by manual operation, and reducing the instability of product quality caused by human interference .

Compared with the traditional process, the PLC automatic control system controls the speed of material circulation pumping, the water temperature of cooling circulating water, the rotation speed of the stirring system, the temperature and pressure monitoring of the system, and the switch of the switch valve, which can ensure the silver powder in the preparation process. The stability of product batches reduces the instability of product quality caused by the interference of artificial factors, reduces the adverse phenomena such as excessive pressure, uneven ball milling, and sequins caused by overheating in the ball milling process of flake silver powder, and greatly improves the use of HJT silver paste. The process, quality and yield of silver powder production and preparation.

At the same time, the inner wall of the c barrel of the mixing tank that is in contact with the material and the grinding ball is provided with a stainless steel filter screen. During the solid-liquid separation process of the silver powder slurry and the ball, the on-off valve g is opened at the end of the ball milling, and the stirring system b is set at a certain speed to make the silver powder slurry pass through the stainless steel filter screen and discharge the silver powder through the discharge valve k, and at the same time, it can pass through the feeding hole m Add a certain amount of ball milling solvent to dynamically wash the balls, so as to maximize the yield of the product and reduce the loss. Wherein the air-cooled chiller j consists of a water tank evaporator 11 , a compressor 12 , a radiator 13 and a cooling fan 14 , and the water tank evaporator 11 is connected to a water outlet pipe through a circulating water pump 15 .

This device is a high-efficiency and highly automated preparation device for flake silver powder for HJT silver paste. There is almost no manual transfer in the whole process, which greatly reduces the instability of product quality and labor costs caused by the interference of artificial factors. The machine is suitable for Strong performance and high efficiency, suitable for micron-scale grinding of flake metal and metal mixed powder. Simple to use with precise mass production reproducibility based on production results between batches. It is very suitable for mass production.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (5)

1. A preparation device for flake silver powder for HJT silver paste, characterized in that it includes a stirring tank and a stirring system (b), and the stirring tank includes a stirring tank barrel (c) and is arranged on the stirring tank barrel ( c) outer jacket, the stirring system (b) includes a stirring motor inverted at the top opening of the stirring tank body (c), and the stirring tank body (c) is provided with stirring propeller blades (d ), the stirring propeller blade (d) is connected to the stirring motor through the reducer (l), the top of the mixing tank barrel (c) is connected to the feeding pipe through the feeding switch valve (h), and the feeding pipe is provided with an automatic feeding funnel ( a), the upper and lower side walls of the mixing tank body (c) are respectively connected to the pneumatic diaphragm pump (i) through the feed pipe and the discharge pipe, and the upper and lower side walls of the jacket are respectively connected to the air-cooled chiller through the water outlet pipe and the water inlet pipe (j), the bottom of the mixing tank is connected to the discharge valve (k) through the discharge switch valve (g). 2. The preparation device of flake silver powder for HJT silver paste according to claim 1, characterized in that, the top of the stirring tank is provided with a feeding cover, and the reducer (l) and the feeding switch valve (h ) is set on the feeding cover, which is also provided with a feeding hole (m), a pressure monitor (e) and a thermometer (f). 3. The preparation device of flake silver powder for HJT silver paste according to claim 2, characterized in that, it also includes a PLC controller, and the PLC controller is respectively connected to the automatic feeding funnel (a), the stirring system (b), pressure monitor (e), thermometer (f), discharge switch valve (g), feed switch valve (h), pneumatic diaphragm pump (i) and air-cooled chiller (j). 4. A preparation device for flake silver powder for HJT silver paste according to claim 1, 2 or 3, characterized in that, the air-cooled chiller (j) consists of a water tank evaporator (11 ), a compressor (12), a radiator (13) and a cooling fan (14), and the water tank evaporator (11) is connected to the water outlet pipe through a circulating water pump (15). 5 . The device for preparing flake silver powder for HJT silver paste according to claim 4 , characterized in that, the inner wall of the mixing tank (c) is provided with a stainless steel filter. 6 .

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