Production and grinding device for thermosetting powder coating

Abstract

The invention discloses a thermosetting powder coating production grinding device which comprises a grinding box, a driving rotating plate driven by a motor to rotate is rotatably mounted on the inner wall of the top of the grinding box, a plurality of grinding heads are fixedly connected to the bottom of the driving rotating plate through connecting rods, and the grinding heads are annularly arranged; a grinding seat is arranged outside the grinding head and comprises a fixed seat fixedly connected to the inner wall of the grinding box; compared with the prior art, raw materials needing to be ground can be well ground by arranging the driving rotating plate, the grinding head and the grinding seat in the grinding box, ground powder can be subjected to particle size grading through a second filter screen, accordingly, separated materials with different particle sizes are graded and collected, and meanwhile, the grinding efficiency is improved. And negative pressure can be generated in the grinding box by utilizing the powder intercepting and filtering assembly and the exhaust fan, so that discharge of the powder is better promoted.

Description

Technical Field

[0001] This invention relates to the field of powder coating technology, specifically to a grinding apparatus for the production of thermosetting powder coatings. Background Technology

[0002] Thermosetting powder coatings are a new type of solvent-free, 100% solid powder coating. They feature solvent-free, pollution-free, recyclable, environmentally friendly, energy- and resource-saving properties, reduced labor intensity, and high mechanical strength of the coating film. Currently, the raw materials for producing thermosetting powder coatings generally include solid resins, curing agents, pigments, fillers, and additives. Since most raw materials, such as solid resins, are large-particle or blocky materials, they require crushing, pulverizing, or grinding.

[0003] In the existing technology, when crushing, pulverizing or grinding raw materials for thermosetting powder coatings, the raw materials are generally ground directly, and the ground materials are then screened by a multi-stage screening device. The unqualified large-diameter powder particles are recycled and pulverized or ground again. This increases the number of production steps and reduces production efficiency. Therefore, this invention proposes a grinding device for the production of thermosetting powder coatings. Summary of the Invention

[0004] The purpose of this invention is to provide a grinding apparatus for the production of thermosetting powder coatings to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for producing thermosetting powder coatings, comprising a grinding box, a drive plate driven by a motor being rotatably mounted on the top inner wall of the grinding box, a plurality of grinding heads being fixedly connected to the bottom of the drive plate via connecting rods, and the plurality of grinding heads being arranged in a ring, a grinding seat being provided outside the grinding heads, the grinding seat including a fixed seat fixedly connected to the inner wall of the grinding box, and a grinding fixing ring being fixedly connected to the fixed seat and arranged outside the plurality of grinding heads, an abrasive outlet hole being opened on the bottom wall of the grinding fixing ring, a discharge port communicating with the abrasive outlet hole being opened at the bottom of the fixed seat, a second filter screen being provided below the discharge port, a powder interception and filtering assembly being provided below the second filter screen, and an exhaust fan being fixedly installed and connected to one end of the powder interception and filtering assembly.

[0006] As a preferred technical solution of the present invention, the powder interception and filtration assembly includes a negative pressure air duct, one end of which is fixedly connected to the air inlet pipe of the exhaust fan, a support mesh frame is fixedly connected to the negative pressure air duct, and a filter bag is fixedly sleeved on the outer surface of the support mesh frame.

[0007] As a preferred technical solution of the present invention, the cross-section of the fixing seat is U-shaped, and a limiting plate is fixedly connected to the upper surface of the fixing seat, and a first filter screen is fixedly connected between the lower surface of the limiting plate and the bottom inner wall of the fixing seat.

[0008] As a preferred embodiment of the present invention, the first filter screen is a cylindrical structure and is disposed outside the grinding fixing ring. A temporary storage cavity is provided between the first filter screen and the grinding fixing ring. A return port is provided between the limiting plate and the grinding fixing ring, and the return port is connected to the temporary storage cavity.

[0009] As a preferred embodiment of the present invention, a discharge chamber is provided between the fixed base and the first filter screen, and the discharge chamber is connected to the discharge port.

[0010] As a preferred embodiment of the present invention, a raw material feeding pipe is provided above the material limiting plate inside the grinding box.

[0011] As a preferred embodiment of the present invention, the abrasive outlet is a funnel-shaped structure, with a narrow opening on the side facing the grinding head and a wide opening on the side facing the first filter screen.

[0012] As a preferred embodiment of the present invention, a first powder collection area is provided above the second filter screen, and a second powder collection area is provided below the second filter screen.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The present invention discloses a grinding apparatus for producing thermosetting powder coatings. By setting a drive rotating plate, a grinding head and a grinding seat in the grinding chamber, the raw materials to be ground can be well ground. Furthermore, the ground powder can be classified by particle size through a second filter screen, thereby collecting materials with different particle sizes. At the same time, the powder interception filter component and the exhaust fan can generate negative pressure in the grinding chamber, thereby better promoting the discharge of powder.

[0015] Other features and advantages of the present invention will be described in detail in the following specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the grinding base of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the powder interception and filtration component of the present invention.

[0019] In the diagram: 1. Grinding box; 2. Drive rotating plate; 20. Bushing; 3. Motor; 4. Grinding head; 5. Grinding base; 50. Fixing base; 51. Grinding fixing ring; 52. Discharge port; 53. Abrasive outlet; 54. Limiting plate; 55. First filter screen; 56. Temporary storage chamber; 57. Return port; 58. Discharge chamber; 6. Second filter screen; 7. Raw material feeding pipe; 8. Powder interception and filtration assembly; 81. Filter bag; 82. Support frame; 83. Negative pressure air duct; 9. Exhaust fan; 90. Fan inlet pipe; 91. High-pressure air backflushing pipe; 11. First powder collection area; 12. Second powder collection area. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figures 1-3In this embodiment, a grinding apparatus for producing thermosetting powder coatings is provided, including a grinding box 1. A drive plate 2 driven by a motor 3 is rotatably mounted on the top inner wall of the grinding box 1. A bushing 20 is rotatably connected to the outer surface of the drive plate 2, and the outer surface of the bushing 20 is fixedly connected to the inner wall of the grinding box 1. A plurality of grinding heads 4 are fixedly connected to the bottom of the drive plate 2 via a connecting rod, and the plurality of grinding heads 4 are arranged in a ring. A grinding seat 5 is provided outside the grinding heads 4. The grinding seat 5 includes a fixing seat 50 fixedly connected to the inner wall of the grinding box 1, and a grinding fixing ring 51 arranged outside the plurality of grinding heads 4 is fixedly connected to the fixing seat 50. An abrasive outlet hole 53 is opened on the bottom wall of the grinding fixing ring 51. The bottom of the fixing seat 50 is... A discharge port 52 connected to the abrasive outlet 53 is provided. A second filter screen 6 is provided below the discharge port 52, and a powder interception filter assembly 8 is provided below the second filter screen 6. A blower 9 is fixedly installed at one end of the powder interception filter assembly 8 and connected to it. A raw material feeding pipe 7 is provided above the limiting plate 54 inside the grinding box 1. A first powder collection area 11 is provided above the second filter screen 6, and a second powder collection area 12 is provided below the second filter screen 6. With the drive rotating plate 2, grinding head 4 and grinding seat 5 provided in the grinding box 1, the raw materials to be ground can be well ground. Furthermore, the ground powder can be classified by particle size through the second filter screen 6, thereby classifying and collecting materials of different particle sizes. The powder interception and filtration assembly 8 includes a negative pressure duct 83, one end of which is fixedly connected to the fan inlet duct 90 of the exhaust fan 9. A support mesh frame 82 is fixedly connected to the negative pressure duct 83, and a filter bag 81 is fixedly fitted onto the outer surface of the support mesh frame 82. By using the powder interception and filtration assembly 8 and the exhaust fan 9, negative pressure can be generated inside the grinding chamber 1, thereby better promoting the discharge of powder. When the exhaust fan 9 is started, the negative pressure duct 83 can generate negative pressure suction, thereby generating negative pressure suction inside the first powder collection area 11, the second powder collection area 12, and the grinding seat 5. The ground powder will pass well through the abrasive outlet 53 under the action of negative pressure and be discharged into the first powder collection area 11 through the discharge port 52, and then... The second filter screen 6 allows smaller particles of powder to enter the second powder collection area 12. The filter bag 81 of the powder interception filter assembly 8 intercepts the powder entering the second powder collection area 12, thus retaining the powder within the second powder collection area 12. The air is then discharged by the exhaust fan 9. In addition, a high-pressure air backflushing pipe 91 is installed inside the fan inlet pipe 90, with one end of the high-pressure air backflushing pipe 91 penetrating through the fan inlet pipe 90 and extending to the outside of the grinding box 1. A high-pressure air pipe can be connected to it. When the filter bag 81 of the powder interception filter assembly 8 becomes clogged, the high-pressure air backflushing pipe 91 can be used to backflush the filter bag 81 from the inside out, thereby effectively solving the clogging problem of the filter bag 81.

[0024] In this embodiment, the cross-section of the fixing base 50 is U-shaped, and a limiting plate 54 is fixedly connected to the upper surface of the fixing base 50. A first filter screen 55 is fixedly connected between the lower surface of the limiting plate 54 and the bottom inner wall of the fixing base 50. The first filter screen 55 has a cylindrical structure and is disposed outside the grinding fixing ring 51. A temporary storage cavity 56 is provided between the first filter screen 55 and the grinding fixing ring 51. A return port 57 is provided between the limiting plate 54 and the grinding fixing ring 51, and the return port 57 communicates with the temporary storage cavity 56. A discharge cavity 58 is provided between the fixing base 50 and the first filter screen 55. 8 is connected to the discharge port 52. When the ground powder enters the temporary storage chamber 56 through the grinding outlet 53, the qualified powder will enter the discharge chamber 58 through the first filter screen 55, and then be discharged to the first powder collection area 11 or the second powder collection area 12 through the discharge port 52. The unqualified powder with a larger particle size will be temporarily stored in the temporary storage chamber 56. As the amount of powder increases, the powder height increases, and the overflowing powder flows into the interior of the grinding fixing ring 51 through the return port 57. Then it is ground again by the grinding fixing ring 51 and the grinding head 4, thereby improving the grinding effect and efficiency, and eliminating the trouble of screening.

[0025] In this embodiment, the abrasive outlet 53 has a trumpet-shaped structure, with a narrow opening on the side facing the grinding head 4 and a wide opening on the side facing the first filter screen 55. The trumpet-shaped abrasive outlet 53 facilitates the passage of the ground powder through the abrasive outlet 53, improving the smoothness of material discharge.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A grinding apparatus for producing thermosetting powder coatings, characterized in that, The grinding chamber includes a grinding box (1). A drive plate (2), driven by a motor (3), is rotatably mounted on the top inner wall of the grinding box (1). Multiple grinding heads (4) are fixedly connected to the bottom of the drive plate (2) via connecting rods, and the multiple grinding heads (4) are arranged in a ring. A grinding seat (5) is provided outside each grinding head (4). The grinding seat (5) includes a fixed base (50) fixedly connected to the inner wall of the grinding box (1), and multiple grinding heads (4) are fixedly connected to the fixed base (50) and arranged in a ring. The grinding head (4) has a grinding fixing ring (51) on its outer side. The grinding fixing ring (51) has an abrasive outlet hole (53) on its bottom wall. The fixing seat (50) has a discharge port (52) at its bottom that communicates with the abrasive outlet hole (53). A second filter screen (6) is provided below the discharge port (52). A powder interception filter assembly (8) is provided below the second filter screen (6). A fan (9) is fixedly installed at one end of the powder interception filter assembly (8) and communicates with it.

2. The grinding apparatus for producing thermosetting powder coatings according to claim 1, characterized in that, The powder interception and filtration assembly (8) includes a negative pressure duct (83), and one end of the negative pressure duct (83) is fixedly connected to the fan inlet pipe (90) of the exhaust fan (9). A support frame (82) is fixedly connected to the negative pressure duct (83), and a filter bag (81) is fixedly sleeved on the outer surface of the support frame (82).

3. The grinding apparatus for producing thermosetting powder coatings according to claim 1, characterized in that, The fixed seat (50) has a concave cross-section, and a limiting plate (54) is fixedly connected to the upper surface of the fixed seat (50). A first filter screen (55) is fixedly connected between the lower surface of the limiting plate (54) and the bottom inner wall of the fixed seat (50).

4. The grinding apparatus for producing thermosetting powder coatings according to claim 3, characterized in that, The first filter screen (55) has a cylindrical structure and is located outside the grinding fixing ring (51). A temporary storage cavity (56) is provided between the first filter screen (55) and the grinding fixing ring (51). A return port (57) is provided between the limiting plate (54) and the grinding fixing ring (51), and the return port (57) is connected to the temporary storage cavity (56).

5. The grinding apparatus for producing thermosetting powder coatings according to claim 4, characterized in that, A discharge chamber (58) is provided between the fixed base (50) and the first filter screen (55), and the discharge chamber (58) is connected to the discharge port (52).

6. The grinding apparatus for producing thermosetting powder coatings according to claim 3, characterized in that, The grinding box (1) is provided with a raw material feeding pipe (7) located above the limiting plate (54).

7. The grinding apparatus for producing thermosetting powder coatings according to claim 4, characterized in that, The abrasive outlet (53) has a trumpet-shaped structure, with a narrow opening on the side facing the grinding head (4) and a wide opening on the side facing the first filter screen (55).

8. The grinding apparatus for producing thermosetting powder coatings according to claim 1, characterized in that, The second filter screen (6) has a first powder collection area (11) above it and a second powder collection area (12) below it.

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