Powdered ink processing and feeding system capable of preventing scrap iron impurities from entering fine grinding machine

Abstract

The utility model discloses a powdered ink processing and feeding system capable of preventing scrap iron impurities from entering a fine grinding machine. The powdered ink processing and feeding system comprises an open material box, the bottom side of the open material box is connected to a material suction device through a suction pipe, an exhaust port of the material suction device is connected with a negative pressure pump, and a gas bottom side discharge port is connected to a feed port of a buffer tank A; the buffer tank A is connected to a feeding port of the venturi ejector A through the screw feeder A. An air inlet of the venturi ejector A is connected with the positive pressure pump A, an exhaust port of the venturi ejector A is connected to an air inlet of the cyclone separator, an exhaust port in the top of the cyclone separator is connected to the solid-gas separator, a discharging port in the bottom of the solid-gas separator is connected to a feeding port of the buffer tank C, and a discharging port in the bottom of the buffer tank C is connected to a discharging port of the cyclone separator. The buffer tank C is connected to a feeding port of the venturi ejector B through the screw feeder B. An air inlet of the venturi ejector B is connected with an outlet of the suction pump, an inlet of the suction pump is connected with the air refrigerator, and an exhaust port of the venturi ejector B is connected to the fine grinding machine. According to the utility model, iron powder in powdered ink can be separated to the maximum extent, and the optimal operation condition of each process can be maintained.

Description

Technical Field

[0001] The utility model relates to a feeding system, in particular to a toner processing feeding system which can prevent iron filings and impurities from entering a fine grinder. Background Art

[0002] In the process of making printer toner, the raw materials need to be mixed, melted and pressed into tablets, and then crushed. The crushed particle size is about 1mm, and then it enters the fine grinder to be ground into fine powder of 3-20 μm. The speed of the fine grinder is very high, and the grinding teeth are very precise parts. In the process of tableting and crushing, the toner is inevitably mixed with iron powder produced by equipment wear. The long-term mixing of these iron powders will cause the grinding teeth of the fine grinder to crack or be damaged, thereby affecting the performance of the equipment. Since the toner itself is also magnetic, it is difficult to remove the iron powder by magnetic attraction. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a toner processing feeding system which can prevent iron filings and impurities from entering a fine grinder, so as to solve the technical problems existing in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A toner processing feeding system capable of preventing iron filings and impurities from entering a fine grinder comprises an open material box, the bottom side of the open material box being connected to a suction device via a suction pipe, the exhaust port of the suction device being connected to a negative pressure pump, and the bottom side discharge port being connected to a feed port of a buffer tank A; the buffer tank A being connected to the feed port of a venturi ejector A via a screw feeder A, the air inlet of the venturi ejector A being connected to a positive pressure pump, the exhaust port being connected to the air inlet of a cyclone separator, the top exhaust port of the cyclone separator being connected to a solid-gas separator, the bottom discharge port of the solid-gas separator being connected to the feed port of a buffer tank C, the buffer tank C being connected to the feed port of a venturi ejector B via a screw feeder B, the air inlet of the venturi ejector B being connected to a suction pump outlet, the suction pump inlet being connected to an air cooler, and the exhaust port of the venturi ejector B being connected to a fine grinder.

[0006] Furthermore, it comprises a conveyor belt, which is used to transfer the crushed coarse powder from the pulverizing device to the open material box.

[0007] Furthermore, the bottom discharge port of the cyclone separator is connected to the buffer tank B.

[0008] The advantages of the utility model are:

[0009] The utility model utilizes a cyclone separator to separate iron powder from toner, and releases the pressure of the conveyed toner, and then adjusts the conveying amount through a screw feeder A, and re-pressurizes it in conjunction with a positive pressure pump A to make it reach the optimal separation condition of the cyclone separator, thereby achieving maximum separation of the iron powder, and then releases the pressure again, and adjusts the conveying amount through a screw feeder B, and mixes cold air to adapt to the working conditions of the fine grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model.

[0011] In the figure, 1-open material box, 11-conveyor belt, 2-suction device, 21-negative pressure pump, 3-buffer tank A, 31-screw feeder, 4-Venturi ejector A, 41-positive pressure pump, 5-cyclone separator, 51-buffer tank B, 6-solid-gas separator, 7-buffer tank C, 71-screw feeder B, 8-Venturi ejector B, 9-suction pump, 91-air cooler. DETAILED DESCRIPTION

[0012] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0013] As shown in the figure:

[0014] A toner processing feeding system capable of preventing iron filings and impurities from entering a fine grinding machine comprises an open material box 1, the bottom side of the open material box 1 is connected to a suction device 2 through a suction pipe, the exhaust port of the suction device 2 is connected to a negative pressure pump 21, and the bottom side discharge port is connected to the feed port of a buffer tank A3; the buffer tank A3 is connected to the feed port of a Venturi ejector A4 through a screw feeder A31, the air inlet of the Venturi ejector A4 is connected to a positive pressure pump 41, and the exhaust port is connected to a cyclone separator. The air inlet of the separator 55, the top exhaust port of the cyclone separator 55 is connected to the solid-gas separator 66, the bottom discharge port of the solid-gas separator 66 is connected to the feed port of the buffer tank C77, the buffer tank C77 is connected to the feed port of the Venturi ejector B8 through the screw feeder B7171, the air inlet of the Venturi ejector B8 is connected to the outlet of the suction pump 9, the inlet of the suction pump 9 is connected to the air cooler 91, and the exhaust port of the Venturi ejector B8 is connected to the fine grinder.

[0015] In the utility model, the open material box 1 is used to store coarse toner powder. Since the coarse toner powder will enter the fine grinding process after being processed in the production process, the crushed coarse powder can be transmitted from the pulverizing equipment to the open material box 1 by installing a conveyor belt 11.

[0016] The toner in the open material box 1 is sucked into the suction device 2 by the suction of the negative pressure pump 21. The suction device 2 simultaneously filters the coarse toner inside and then stores it in the buffer tank A3. Entering this step also plays the role of transporting toner and transferring it between different devices.

[0017] Afterwards, the coarse toner in the buffer tank A3 is quantitatively transported to the Venturi ejector A4 (an ejector based on the Venturi effect, which allows a small amount of airflow to carry a large amount of powder for mixed injection, prior art) through the screw feeder A31, and under the compressed airflow generated by the positive pressure pump 41, the toner is mixed and ejected into the cyclone separator 55 (prior art) after being ejected by the Venturi ejector A4.

[0018] The cyclone separator 55 is a device that achieves separation by causing the rotational motion caused by the tangential introduction of airflow, so that solid particles or liquid droplets with large inertial centrifugal force are thrown toward the outer wall. At the operating point, the separation efficiency is 99%, and within the range of ±15% of the operating point, the separation efficiency is 97%. The reason why the screw feeder A31 is used for quantitative delivery is to ensure that the separation amount is at the optimal operating point.

[0019] However, since the specific gravity of iron powder is much greater than that of toner, the separation rate can basically reach 100%. Because the greater the specific gravity difference, the better the separation effect, the toner will slide down into the bottom of the cyclone separator 55 after being thrown onto the outer wall and discharged. For the convenience of collection, a buffer tank B5151 can be connected to the bottom outlet of the cyclone separator 55 to collect iron powder. The buffer tank B5151 does not need to be too large, and the amount of iron powder is not large.

[0020] Carbon powder has a lighter specific gravity and will enter the solid-gas separator 66 from the exhaust port along with the upward swirling airflow in the center. At this time, it is depressurized. On the one hand, the processing conditions of the fine grinder are inconsistent with those of the cyclone separator 55, and the delivery rate needs to be readjusted through the screw feeder B7171. Secondly, the fine grinder needs to be mixed with toner and introduced into the low-temperature air (-15°C to -20°C) treated by the air cooler 91, so it needs to be mixed twice through the Venturi ejector B8 and then transmitted to the fine grinder for processing.

[0021] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A toner processing feeding system capable of preventing iron filings and impurities from entering a fine grinder, characterized in that: It includes an open material box, the bottom side of which is connected to a suction device through a suction pipe, the exhaust port of the suction device is connected to a negative pressure pump, and the discharge port on the bottom side is connected to the feed port of a buffer tank A; the buffer tank A is connected to the feed port of a venturi ejector A through a screw feeder A, the air inlet of the venturi ejector A is connected to a positive pressure pump, and the exhaust port is connected to the air inlet of a cyclone separator, the top exhaust port of the cyclone separator is connected to a solid-gas separator, the bottom discharge port of the solid-gas separator is connected to the feed port of a buffer tank C, the buffer tank C is connected to the feed port of a venturi ejector B through a screw feeder B, the air inlet of the venturi ejector B is connected to the outlet of a suction pump, the inlet of the suction pump is connected to an air cooler, and the exhaust port of the venturi ejector B is connected to a fine grinder.

2. The toner processing and feeding system capable of preventing iron filings and impurities from entering the fine grinding machine according to claim 1 is characterized in that: A conveyor belt is included for conveying crushed coarse powder from a comminution device to an open bin.

3. The toner processing and feeding system capable of preventing iron filings and impurities from entering the fine grinding machine according to claim 1 is characterized in that: The bottom discharge port of the cyclone separator is connected to the buffer tank B.

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