Stirring and grinding assembly for spraying machine

Abstract

The utility model relates to a stirring and grinding assembly for a coating machine. The stirring and grinding assembly comprises a hopper, a grinding groove is formed in the middle of the bin body, a mounting hole is formed in the groove bottom of the grinding groove, and a coating outlet is formed in the bottom wall of the grinding groove; the rotary grinding mechanism comprises a rotating shaft, and the top of the rotating shaft extends into the grinding groove; the stirring and shifting mechanism comprises stirring blades and further comprises a backflow assembly, the backflow assembly comprises a backflow pipe and a pump, the bottom of the backflow pipe is embedded in the bin body and extends into the bottom of the grinding groove, and the top of the backflow pipe extends out of the bin body and is arranged in the middle of the hopper; the stirring and stirring mechanism and the rotary grinding mechanism are arranged up and down, and the coating is ground after being stirred, so that on one hand, stirring dead angles are effectively avoided, the uniformity and fineness of the coating are improved to a certain extent, and on the other hand, the coating cannot be deposited between the top of the bin body and the bottom of the hopper as much as possible; the fluidity of the coating is better as far as possible.

Description

Technical Field

[0001] This utility model relates to the field of spraying machine technology, specifically to a mixing and grinding assembly for a spraying machine. Background Technology

[0002] In the spraying industry, traditional paint mixing and grinding methods often rely on manual operation or simple mechanical equipment. These methods suffer from problems such as uneven mixing, low grinding efficiency, and serious paint waste. In order to improve the processing efficiency and quality of paint, some automated paint mixing and grinding equipment has gradually emerged in the market. However, existing paint mixing and grinding equipment is prone to dead zones in mixing and grinding operations, making it impossible to fully guarantee the uniformity of the paint. In addition, the power transmission mechanism of the spraying machine also has the problem of being complex and easily damaged, which not only increases the maintenance cost of the equipment, but also affects the stability and service life of the equipment.

[0003] In addition, existing paint mixing and grinding equipment also has shortcomings in paint circulation. Some equipment lacks an effective paint return mechanism, which means that if the paint becomes unevenly mixed after mixing and grinding, it cannot be repeatedly mixed and ground. Therefore, there is room for improvement in mixing and grinding.

[0004] Therefore, in order to overcome the shortcomings of existing technologies, improve the mixing and grinding efficiency and uniformity of coatings, and reduce equipment maintenance costs and service life, it is necessary to develop a new type of mixing and grinding assembly for spraying machines to meet the needs of the spraying industry for coating processing equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a mixing and grinding assembly that can simultaneously stir and grind coatings and recycle the stirred and ground coatings for secondary mixing and grinding in a spraying machine.

[0006] The technical problem to be solved by this utility model is achieved through the following technical solution: a mixing and grinding assembly for a spraying machine, comprising;

[0007] The hopper has a paint inlet at the top for use with a sprayer.

[0008] The bottom of the hopper is fitted onto the top outer circumference of the hopper body. A grinding groove is provided in the middle of the hopper body. An installation hole is provided at the bottom of the grinding groove. A paint outlet is provided on the bottom wall of the grinding groove.

[0009] A rotary grinding mechanism includes a rotating shaft, the outer circumferential surface of which is rotatably mounted on the inner circumferential surface of a mounting hole via a rotary bearing, the top of which extends into a grinding groove, and a grinding shaft is fixedly mounted on the outer circumferential surface of the rotating shaft placed in the grinding groove. The space between the outer circumferential surface of the grinding shaft and the inner circumferential surface of the grinding groove forms a grinding gap.

[0010] The stirring and feeding mechanism includes several stirring blades, the top of the grinding shaft extends into the bottom of the hopper, and the stirring blades are fixed on the top outer circumferential surface of the grinding shaft.

[0011] It also includes a reflux assembly for secondary mixing and grinding of the coating, which includes a reflux pipe and a pump. The bottom of the reflux pipe is embedded in the chamber and extends into the bottom of the grinding tank, while the top of the reflux pipe extends out of the chamber and is placed in the middle of the hopper.

[0012] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the mixing and grinding assembly for the spraying machine described above, wherein a power mechanism mounting box is installed on the bottom wall of the chamber, and a rotating power mechanism that drives the grinding shaft to rotate is installed in the power mechanism mounting box with a power output end cooperating with the rotating shaft transmission.

[0013] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the grinding and mixing assembly for the spraying machine described above has a cross-section of trapezoidal in the grinding tank.

[0014] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the mixing and grinding assembly for the spraying machine described above has a cross-section of the grinding shaft in the shape of a trapezoid, and grinding teeth for grinding the coating are fixedly provided on the outer circumferential surface of the grinding shaft.

[0015] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the mixing and grinding assembly for the spraying machine described above has a sealing ring on the top edge of the rotating shaft and the mounting hole.

[0016] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the mixing and grinding assembly for the spraying machine described above, wherein the outer wall of the chamber is fixed with angle steel to facilitate the installation of the chamber.

[0017] The technical problem to be solved by this utility model can also be achieved through the following technical solution: the mixing and grinding assembly for the spraying machine described above, wherein the top of the hopper is hinged with a switch door that can close the paint inlet.

[0018] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0019] (1) The mixing and feeding mechanism and the rotary grinding mechanism are set up one above the other. The coating is mixed and then ground. On the one hand, this effectively avoids the mixing dead corner and improves the uniformity and fineness of the coating to a certain extent. On the other hand, it can also prevent the coating from accumulating and settling between the top of the silo and the bottom of the hopper, so as to make the coating flow better.

[0020] (2) A reflux assembly is added between the bottom of the grinding tank and the hopper. The coating at the bottom of the grinding tank can be drawn back into the hopper for secondary stirring and grinding. This not only improves the utilization rate of the coating and reduces waste, but also further ensures the uniformity and fineness of the coating and improves the overall processing efficiency.

[0021] (3) Angle steel is fixed on the outer wall of the hopper to facilitate the stable installation of the hopper on the spraying machine; at the same time, the hinged opening and closing door design at the top of the hopper makes it more convenient and faster to add paint and clean the equipment, improving the ease of use and maintainability of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 2 This is a top view of the structure of this utility model.

[0024] Attached reference numerals: 1. Hopper; 2. Paint inlet; 3. Opening / closing door; 4. Silo body; 5. Angle steel; 6. Grinding tank; 7. Paint outlet; 8. Rotating shaft; 9. Grinding shaft; 10. Power mechanism mounting box; 11. Rotary power mechanism; 12. Agitator blades; 13. Return pipe; 14. Pump. Detailed Implementation

[0025] The specific technical solutions of this utility model are further described below with reference to the accompanying drawings, so as to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0026] Example 1, referring to Figure 1-2 A mixing and grinding assembly for a spraying machine, comprising:

[0027] Hopper 1 is configured in a roughly funnel shape. The top of hopper 1 has a paint inlet 2 for a sprayer, which is used for adding paint.

[0028] To prevent the paint in hopper 1 from being contaminated, a hinged door 3 is installed at the top of hopper 1 to close the paint inlet 2. The door 3 can selectively cover the paint inlet 2 of hopper 1 according to usage needs, thus preventing the paint in hopper 1 from being contaminated to a certain extent.

[0029] The hopper 4 is formed into a roughly cylindrical structure. An angle steel 5 is fixed on the outer wall of the hopper 4 to facilitate the installation of the hopper 4. The angle steel 5, together with bolt fasteners, allows the hopper 4 to be detachably installed on the spraying machine. The bottom of the hopper 1 is fitted onto the top outer circumference of the hopper 4. A grinding groove 6 is provided in the middle of the hopper 4. The cross-section of the grinding groove 6 is set in a trapezoidal shape. Its size and specifications can be selected according to the usage requirements. An installation hole is provided at the bottom of the grinding groove 6. The installation hole is formed into a roughly circular through hole. A paint outlet 7 is provided on the bottom wall of the grinding groove 6.

[0030] A rotary grinding mechanism includes a rotating shaft 8, which has a sealing ring, such as an O-ring, at the top edge of a mounting hole. The outer circumferential surface of the rotating shaft 8 is rotatably mounted on the inner circumferential surface of the mounting hole via a rotating shaft bearing. The top of the rotating shaft 8 extends into a grinding groove 6. A grinding shaft 9 is fixedly mounted on the outer circumferential surface of the rotating shaft 8 placed in the grinding groove 6. The cross-section of the grinding shaft 9 is trapezoidal. Grinding teeth for grinding coatings are fixedly mounted on the outer circumferential surface of the grinding shaft 9. The grinding teeth can be formed into a roughly triangular pyramidal structure. The space between the outer circumferential surface of the grinding shaft 9 and the inner circumferential surface of the grinding groove 6 forms a grinding gap. A power mechanism mounting box 10 is installed on the bottom wall of the chamber 4. A rotary power mechanism 11 is installed in the power mechanism mounting box 10, which is in transmission cooperation with the rotating shaft 8 to drive the grinding shaft 9 to rotate. The rotary power mechanism 11 can be a rotary motor, which is existing technology and its specifications and models can be selected according to the usage requirements.

[0031] The stirring and feeding mechanism includes several stirring blades 12, which are formed into a roughly arc-shaped sheet structure. There can be four blades, which are horizontally arranged. The top of the grinding shaft 9 extends into the bottom of the hopper 1, and the stirring blades 12 are fixed on the top outer circumferential surface of the grinding shaft 9.

[0032] It should be noted that the stirring and feeding mechanism is located above the rotary grinding mechanism, so that the coating can be stirred by the stirring blades 12 before grinding. This makes it possible for the coating to avoid accumulating and settling between the top of the bin 4 and the bottom of the hopper 1, and to make the coating flow better.

[0033] To avoid uneven mixing and grinding during the first stage, we added a reflux assembly for secondary mixing and grinding of the coating. This assembly includes a reflux pipe 13 and a pump 14. The bottom of the reflux pipe 13 is embedded in the chamber 4 and extends to the bottom of the grinding tank 6. The top of the reflux pipe 13 extends out of the chamber 4 and is placed in the middle of the hopper 1. The reflux assembly can draw the coating from the bottom of the grinding tank 6 back into the hopper 1 for secondary mixing and grinding, further ensuring the uniformity and fineness of the coating and improving the overall processing efficiency.

[0034] The usage process of the mixing and grinding assembly for the spraying machine in Example 1 is as follows:

[0035] (1) Preparation stage: First, ensure that the spraying machine is in the off state and install the mixing and grinding assembly in the designated position of the spraying machine. Use angle steel 5 and bolt fasteners to firmly install the hopper 4 on the spraying machine. Open the switch door 3 on the top of the hopper 1 and add the paint to be ground into the hopper 1 through the paint inlet 2. After adding, close the switch door 3 to prevent the paint from being contaminated.

[0036] (2) Stirring and grinding stage: Turn on the power of the rotating power mechanism 11 to drive the rotating shaft 8 to rotate. The grinding teeth on the grinding shaft 9 form a grinding gap with the inner wall of the grinding tank 6 to start grinding the coating. While the grinding shaft 9 is rotating, the stirring blades 12 fixed on the outer circumference of the top of the grinding shaft 9 also stir the coating near the top of the grinding shaft 9 to prevent the coating from accumulating and settling between the top of the silo 4 and the bottom of the hopper 1, and to improve the fluidity of the coating. After stirring and grinding, the coating enters the spraying mechanism on the spraying machine through the coating outlet 7.

[0037] (3) Secondary mixing and grinding stage: If uneven mixing or excessive impurities are found in the coating during spraying, pump 14 can be started to pump the coating in the grinding tank 6 to the return pipe 13 and then pump it back into the hopper 1 through the return pipe 13. The returned coating is stirred again by the stirring blade 12 and ground by the grinding shaft 9 to achieve secondary mixing and grinding, further ensuring the uniformity and fineness of the coating.

Claims

1. A mixing and grinding assembly for a spraying machine, characterized in that: It includes; The hopper has a paint inlet at the top for use with a sprayer. The bottom of the hopper is fitted onto the top outer circumference of the hopper body. A grinding groove is provided in the middle of the hopper body. An installation hole is provided at the bottom of the grinding groove. A paint outlet is provided on the bottom wall of the grinding groove. A rotary grinding mechanism includes a rotating shaft, the outer circumferential surface of which is rotatably mounted on the inner circumferential surface of a mounting hole via a rotary bearing, the top of which extends into a grinding groove, and a grinding shaft is fixedly mounted on the outer circumferential surface of the rotating shaft placed in the grinding groove. The space between the outer circumferential surface of the grinding shaft and the inner circumferential surface of the grinding groove forms a grinding gap. The stirring and feeding mechanism includes several stirring blades, the top of the grinding shaft extends into the bottom of the hopper, and the stirring blades are fixed on the top outer circumferential surface of the grinding shaft. It also includes a reflux assembly for secondary mixing and grinding of the coating, which includes a reflux pipe and a pump. The bottom of the reflux pipe is embedded in the chamber and extends into the bottom of the grinding tank, while the top of the reflux pipe extends out of the chamber and is placed in the middle of the hopper.

2. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: A power mechanism mounting box is installed on the bottom wall of the chamber. A power output end is installed in the power mechanism mounting box, which is in cooperation with the rotating shaft to drive the grinding shaft to rotate.

3. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: The grinding groove has a trapezoidal cross-section.

4. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: The grinding shaft has a trapezoidal cross-section, and grinding teeth for grinding coatings are fixed on the outer circumferential surface of the grinding shaft.

5. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: The top edge of the shaft and the mounting hole has a sealing ring.

6. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: Angle steel is fixed on the outer wall of the silo to facilitate its installation.

7. The mixing and grinding assembly for a spraying machine according to claim 1, characterized in that: The top of the hopper is hinged with a switch door that can close the paint inlet.

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