A precision temperature-controlled metal powder coating mixing equipment

Abstract

The invention discloses a precise temperature-controlled metal powder coating mixing equipment, comprising a frame, a feed hopper arranged on the frame, a hot mixing cylinder, a cold mixing cylinder, a cooling device and a driving device installed in an inner cavity of the frame; a stirring device is arranged in the hot mixing cylinder, one end of the stirring device is fixed to the frame, and the other end extends into the hot mixing cylinder; the hot mixing cylinder is provided with a cooling cavity, and the cooling device is connected to the cooling cavity through a cooling circulation pipe to form a segmented cooling circulation system; the invention arranges four segmented circulating cooling water channels with four inlets and four outlets on the hot mixing cylinder, and performs cooling in segments at the same time, so as to achieve fast cooling speed and good effect; at the same time, the temperature in the hot mixing cylinder is monitored in real time, and the temperature control precision is high; in addition, the structure of the frame is arranged in an "N" shape as a whole, the hot mixing cylinder and the cold mixing cylinder are arranged in the inner cavity of the frame, and an air filter element is arranged behind the frame, which, in conjunction with the induced draft fan, can realize the encapsulation treatment of dust, and is not easy to leak out and cause pollution, has a scientific and reasonable layout, and is more environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of powder mixing, in particular to a precise temperature-controlled metal powder coating mixing device. Background Art

[0002] Currently, the mixing technology for metal powder coatings consists of a dry mixing method and a heat treatment method. The powder coating base is added to a high-speed mixer equipped with a temperature-controlled jacket. The high-speed rotation of the machine creates friction between the stirring blades and the mixed material within a short period of time, generating heat through friction and raising the temperature of the base material mixture. Existing mixers have a main shaft in the mixing device, on which are mounted multiple sets of stirring blades. The stirring blades and the main shaft are connected to the circulating water pipe via a rotary joint. The friction between the rotating stirring blades and the material generates heat, bringing the material to the mixing temperature. At this temperature, the surface of the plastic powder particles melts, while the interior of the plastic powder particles is solid. In this state, the powder firmly adheres to the surface of the plastic powder particles, completing the mixing. During this over-stirring and heating process, temperature control and dust treatment are important parameters for achieving better mixing effects. If the temperature is too high, the melting degree of the plastic powder particles will increase, forming agglomerates, and the expected product cannot be obtained. If the temperature is too low, the surface of the plastic powder will not be fully and firmly melted, which is insufficient for comprehensive and firm adhesion with the pigment particles, resulting in uneven color and poor mixing effect. At the same time, poor temperature and dust control will easily lead to downtime, making it impossible to operate continuously for 24 hours, affecting work efficiency, and causing secondary pollution. Summary of the Invention

[0003] Therefore, in order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a precise temperature-controlled metal powder coating mixing equipment, which is equipped with a segmented cooling structure, has a fast cooling speed, good effect, and high temperature control accuracy.

[0004] The purpose of the present invention is achieved by adopting the following technical solutions:

[0005] A precision temperature-controlled metal powder coating mixing device comprises a frame, a feed hopper mounted on the frame, a hot mixing cylinder, a cold mixing cylinder, a cooling device, and a driving device; a stirring device is provided in the hot mixing cylinder, one end of the stirring device is fixed to the frame, and the other end of the stirring device extends into the hot mixing cylinder; the cooling device is used to provide a cooling medium; a plurality of cooling cavities are provided on the inner wall of the hot mixing cylinder; the cooling device is connected to the cooling cavities respectively through cooling circulation pipes to form a segmented cooling circulation system; the driving device comprises a first motor and a second motor respectively connected to the hot mixing cylinder and the cold mixing cylinder;

[0006] The metal powder enters the hot mixing cylinder through the feed hopper for hot mixing, and the hot mixed mixture enters the cold mixing cylinder from the discharge port of the hot mixing cylinder for cold mixing and is finally discharged.

[0007] As a further illustration of the above scheme, the cooling chamber includes a first cooling chamber, a second cooling chamber, and a third cooling chamber, respectively arranged on the top, bottom, and side wall of the hot mixing cylinder; the cooling device is connected to the first cooling chamber, the second cooling chamber, and the third cooling chamber through a first cooling circulation pipe, a second cooling circulation pipe, and a third cooling circulation pipe, respectively, and transports cooling medium to form a segmented cooling circulation system.

[0008] As a further illustration of the above solution, the cooling chamber also includes a fourth cooling chamber, the cooling chamber also includes a fourth cooling chamber, the fourth cooling chamber is arranged below the third cooling chamber, and the cooling device is connected to the fourth cooling chamber through a fourth cooling circulation pipe.

[0009] As a further illustration of the above solution, a temperature sensor is provided in the hot mixing cylinder, and the mixing device is also provided with a controller.

[0010] As a further illustration of the above solution, the first cooling chamber, the second cooling chamber, the third cooling chamber, and the fourth cooling chamber are respectively provided with a water inlet and a water outlet.

[0011] As a further illustration of the above solution, the mixing device is further provided with a dust filtering assembly; the dust filtering assembly includes an air filter element connected to the hot mixing cylinder and an induced draft fan for guiding air.

[0012] As a further illustration of the above solution, the rack is arranged in an "n"-shaped structure.

[0013] As a further illustration of the above solution, the stirring device includes a rotating shaft and a plurality of stirring blades fixed to the rotating shaft. The lengths of the stirring blades increase from top to bottom, and the topmost stirring blade is provided with a downwardly inclined scraper.

[0014] As a further illustration of the above solution, the rotating shaft is provided with a hollow inner cavity, and the cooling device is connected to the hollow inner cavity via a fifth circulating cooling pipe.

[0015] As a further illustration of the above solution, a fifth cooling chamber is provided around the inner cavity of the cold mixing cylinder, and the cooling device is connected to the fifth cooling chamber via a sixth cooling circulation pipe; the fifth cooling chamber is provided with the water inlet and water outlet.

[0016] As a further illustration of the above solution, the frame is further provided with a first air-permeable filter element and a second air-permeable filter element which are respectively connected to the hot mixing cylinder and the cold mixing cylinder.

[0017] As a further illustration of the above solution, the frame is further provided with a hydraulic device for driving the hot mixing cylinder to rise and fall, and the hydraulic device includes a hydraulic motor and a hydraulic cylinder.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts a segmented cooling circulation system, namely, four segmented cooling water circuits with four inlets and four outlets are set on the hot mixing cylinder. The top, upper side wall, lower side wall and bottom of the hot mixing cylinder are cooled simultaneously in segments, which has a fast cooling speed and good cooling effect. At the same time, a temperature sensor is installed in the hot mixing cylinder to monitor the temperature in real time, so as to better regulate the cooling circulation effect of the side wall and achieve high temperature control accuracy.

[0020] 2. In addition, the mixing equipment of the present invention has an improved frame structure layout, with an overall "N"-shaped structure. The hot mixing cylinder and cold mixing cylinder are located in the frame cavity, and an air filter is installed behind the frame. In conjunction with the induced draft fan, it can achieve dust encapsulation and treatment, and is not likely to leak out and cause pollution. The layout is scientific and reasonable, production is more environmentally friendly, and the components have a long service life.

[0021] 3. The precise temperature control metal powder coating mixing equipment of the present invention has good temperature control, good cooling effect on the powder, will not cause malfunction and shutdown, can maintain long-term operation, and has high work efficiency;

[0022] 4. The stirring blades of the present invention are provided with downwardly inclined scrapers, which can more easily press down the top materials during the stirring process, thereby making the materials more destructive and stirring more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the front structure of a precise temperature-controlled metal powder coating mixing device according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a cooling circulation system of a precise temperature-controlled metal powder coating mixing device according to a preferred embodiment of the present invention;

[0025] Figure 3 This is a schematic side structural diagram of a precise temperature-controlled metal powder coating mixing device according to a preferred embodiment of the present invention;

[0026] Figure 4 A top view of a precise temperature-controlled metal powder coating mixing device according to a preferred embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the front structure of the hot mixing cylinder of the precise temperature-controlled metal powder coating mixing equipment according to a preferred embodiment of the present invention;

[0028] Figure 6 This is a schematic structural diagram of the stirring device of the precise temperature-controlled metal powder coating mixing equipment according to a preferred embodiment of the present invention.

[0029] In the figure: 1, frame; 11, feed hopper; 12, first air filter; 13, second air filter; 14, hydraulic device; 141, hydraulic motor; 142, hydraulic cylinder; 2, hot mixing cylinder; 21, stirring device; 211, rotating shaft; 212, stirring blade; 213, scraper; 22, cooling chamber; 221, first cooling chamber; 222, second cooling chamber; 223, third cooling chamber; 224, fourth cooling chamber; 23, discharge port; 3, cold mixing Cylinder; 31. Fifth cooling chamber; 4. Cooling device; 41. Pump body; 5. Driving device; 51. First motor; 52. Second motor; 6. Cooling circulation pipe; 61. First cooling circulation pipe; 62. Second cooling circulation pipe; 63. Third cooling circulation pipe; 64. Fourth cooling circulation pipe; 65. Fifth cooling circulation pipe; 66. Sixth cooling circulation pipe; 7. Water inlet; 8. Water outlet; 9. Dust filter assembly; 91. Air filter element; 92. Draft fan. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the technical solutions and advantages of the photoelectric gas sensor probe of the invention are further described in detail below in conjunction with the accompanying drawings and embodiments. The specific structure and characteristics of the photoelectric gas sensor probe are described below by way of example, which should not constitute any limitation to the present invention. At the same time, any of the technical features mentioned below (including implicit or disclosed), as well as any technical features directly displayed or implied in the figure, can be further combined or deleted between these technical features to form more other embodiments that may not be directly or indirectly mentioned in the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0031] In the description of the present invention, unless otherwise specified, terms such as "top," "bottom," "left," "right," and "relative" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0032] like Figure 1-6As shown, a precision temperature-controlled metal powder coating mixing device includes a frame 1, a feed hopper 11 provided on the frame 1, a hot mixing cylinder 2, a cold mixing cylinder 3, a cooling device 4, and a driving device 5 installed in the inner cavity of the frame 1; a stirring device 21 is provided in the hot mixing cylinder 2, one end of the stirring device 21 is fixed to the frame 1, and the other end of the stirring device 21 extends into the hot mixing cylinder 2; the cooling device is used to provide a cooling medium; the hot mixing cylinder 2 is provided with a plurality of cooling chambers 22, and the cooling device 4 is respectively connected to the cooling chambers 22 through cooling circulation pipes 6 to form a segmented cooling circulation system; the driving device 5 includes a first motor 51 and a second motor 52 respectively connected to the hot mixing cylinder 2 and the cold mixing cylinder 3;

[0033] The metal powder enters the hot mixing cylinder 2 through the feed hopper 11 for hot mixing. The hot mixed mixture enters the cold mixing cylinder 3 from the discharge port 23 of the hot mixing cylinder 2 for cold mixing and is finally discharged.

[0034] In this embodiment, the cooling medium is preferably cold water; the cooling device 4 is preferably a cold water tank, and the water in the cold water tank is circulated and transported to the cooling chamber 22 by the pump body 41 to cool the hot mixing cylinder 2.

[0035] In this embodiment, the pump body is a water pump in the prior art, and its working principle can be referred to the prior art and will not be described in detail here.

[0036] As a further preferred embodiment, the cooling chamber 22 includes a first cooling chamber 221, a second cooling chamber 222, and a third cooling chamber 223 respectively arranged on the top, bottom, and side wall of the hot mixing cylinder 2; the cooling device 4 is connected to the first cooling chamber 221, the second cooling chamber 222, and the third cooling chamber 223 through a first cooling circulation pipe 61, a second cooling circulation pipe 62, and a third cooling circulation pipe 63 respectively and transports cooling medium to form the segmented cooling circulation system.

[0037] In this embodiment, the first cooling chamber 221, the second cooling chamber 222, the third cooling chamber 223, the first cooling circulation pipe 61, the second cooling circulation pipe 62, the third cooling circulation pipe 63 and the cooling device are kept open to form their own circulating cooling systems, respectively, to achieve full-time heat exchange with the powder in the hot mixing tank, and avoid the problem of adhesion caused by local excessive temperature, resulting in poor mixing effect or even damage to components.

[0038] As a further preferred embodiment, the cooling chamber 22 further includes a fourth cooling chamber 224 . The fourth cooling chamber 224 is disposed below the third cooling chamber 223 . The cooling device 4 is connected to the fourth cooling chamber 224 via a fourth cooling circulation pipe 64 .

[0039] In this embodiment, four segmented circulating cooling water channels with four inlets and four outlets are provided on the hot mixing cylinder, and cooling is performed simultaneously in segments from the top, upper side wall, lower side wall, and bottom of the hot mixing cylinder. Compared with the non-segmented cooling water channels in the prior art, the cooling parts of the present invention are more uniform, the cooling speed is faster, and the effect is better.

[0040] As a further preferred embodiment, a temperature sensor (not shown in the drawings) is provided in the hot mixing cylinder 2, and the mixing device is further provided with a controller (not shown in the drawings).

[0041] In this embodiment, the temperature sensor senses that the powder temperature exceeds the preset temperature and transmits a signal to the controller. The controller controls the cooling device to transport cooling water to the fourth cooling chamber through the fourth cooling circulation pipe, and forms a circulating water circuit, further increasing the heat exchange with the powder in the hot mixing cylinder.

[0042] In this embodiment, the temperature sensor is a temperature sensor in the prior art, and its working principle can be referred to the prior art and will not be described here in detail; the controller can be a PLC controller in the prior art.

[0043] As a further preferred embodiment, the first cooling chamber 221 , the second cooling chamber 222 , the third cooling chamber 223 , and the fourth cooling chamber 224 are respectively provided with a water inlet 7 and a water outlet 8 .

[0044] As a further preferred embodiment, the mixing device is further provided with a dust filter assembly 9; the dust filter assembly comprises an air filter element 91 connected to the hot mixing cylinder and an induced draft fan 92 for guiding air. The adsorption effect of the induced draft fan, in conjunction with the air filter element, can effectively filter and remove dust generated during the mixing process.

[0045] As a further preferred embodiment, the frame 1 is arranged in an "n"-shaped structure. In this embodiment, the frame 1 is arranged in an "n"-shaped structure as a whole, the hot mixing cylinder 2 and the cold mixing cylinder 3 are arranged in the inner cavity of the frame 1, and an air filter element 91 is provided behind the frame 1. In conjunction with the induced draft fan 92, dust can be encapsulated and processed to prevent leakage and pollution. The layout is scientific and reasonable, and the production is more environmentally friendly.

[0046] As a further preferred embodiment, the stirring device 21 includes a rotating shaft 211 and a plurality of stirring blades 212 fixed on the rotating shaft 211. The length of the stirring blades 212 increases from top to bottom, and the topmost stirring blade 212 is provided with a downwardly inclined scraper 213.

[0047] As a further preferred embodiment, the rotating shaft 211 is provided with a hollow inner cavity, and the cooling device 4 is connected to the hollow inner cavity through a fifth cooling circulation pipe 65. The advantage of this arrangement is that the stirring device can also be cooled synchronously, further improving the cooling effect.

[0048] As a further preferred embodiment, a fifth cooling chamber 31 is provided around the inner cavity of the cold mixing cylinder 3. The cooling device 4 is connected to the fifth cooling chamber 31 via a sixth cooling circulation pipe 66. The fifth cooling chamber 31 is provided with the water inlet 7 and the water outlet 8. The purpose of providing the fifth cooling chamber is to accelerate the cooling speed of the cold mixing cylinder and improve work efficiency.

[0049] As a further preferred embodiment, the frame 1 is further provided with a first air filter element 12 and a second air filter element 13, which are respectively connected to the hot mixing cylinder 2 and the cold mixing cylinder 3. The first air filter element 12 and the second air filter element 13 are respectively used to assist in filtering dust generated by the hot mixing cylinder 2 and the cold mixing cylinder 3, thereby further improving the dust filtering effect.

[0050] As a further preferred embodiment, the frame 1 is further provided with a hydraulic device 14 for driving the hot mixing cylinder 2 to move up and down. The hydraulic device 14 includes a hydraulic motor 141 and a hydraulic cylinder 142 .

[0051] In this embodiment, the working process of the metal powder coating mixing equipment is as follows: first, the mixing equipment is started, powder is added from the feed hopper, the first motor drives the stirring device to rotate, and the powder stirs and rubs to generate a large amount of heat. The cooling device synchronously circulates cold water to the first cooling chamber 221, the second cooling chamber 222, and the third cooling chamber 223 on the top, bottom, and side wall of the hot mixing cylinder 2, and forms a circulating water path to perform heat exchange with the powder in the hot mixing cylinder; in this process, when the temperature sensor in the hot mixing cylinder senses that the powder temperature exceeds 80°C, a signal is transmitted to the controller, and the controller controls The cooling device transports cooling water to the fourth cooling chamber through the fourth cooling circulation pipe, and forms a circulating water circuit to further increase the heat exchange with the powder in the hot mixing tank; after stirring for about 15-30 minutes, the powder in the hot mixing tank enters the cold mixing tank from the discharge port of the hot mixing tank for further cooling treatment, and at this time the circulating cooling system of the cold mixing tank is started, that is, the cooling device transports cooling water to the fifth cooling chamber of the cold mixing tank through the sixth cooling circulation pipe, and performs heat exchange with the mixed material in the cold mixing tank until the temperature of the powder in the cold mixing tank reaches 10-30°C, and then the discharge port of the cold mixing tank is opened to discharge the material.

[0052] The present invention provides four segmented circulating cooling water circuits with four inlets and four outlets on the hot mixing cylinder, and performs segmented cooling from the top, upper side wall, lower side wall, and bottom of the hot mixing cylinder simultaneously, thereby achieving fast cooling speed and good effect. At the same time, a temperature sensor is provided in the hot mixing cylinder to monitor the temperature in the hot mixing cylinder in real time, thereby better regulating the cooling circulation effect of the side wall, achieving high temperature control accuracy and good cooling effect. The invention also avoids malfunctions and shutdowns, and can maintain long-term operation with high work efficiency.

[0053] At the same time, the stirring blades of the present invention are provided with downwardly inclined scrapers, which can more easily press down the top materials during the stirring process, thereby making the materials more destructive and stirring more uniform.

[0054] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A precision temperature-controlled metal powder coating mixing device, comprising a frame, a feed hopper mounted on the frame, a hot mixing cylinder mounted in the inner cavity of the frame, a cold mixing cylinder, a cooling device, and a driving device; a stirring device is provided in the hot mixing cylinder, one end of the stirring device is fixed to the frame, and the other end of the stirring device extends into the hot mixing cylinder; the cooling device is used to provide a cooling medium; and is characterized in that: The inner wall of the hot mixing cylinder is provided with a plurality of cooling cavities; the cooling device is connected to the cooling cavities respectively through cooling circulation pipes to form a segmented cooling circulation system; the cooling cavities include a first cooling cavity, a second cooling cavity, and a third cooling cavity respectively provided on the top, bottom, and side wall of the hot mixing cylinder; the cooling device is connected to the first cooling cavity, the second cooling cavity, and the third cooling cavity respectively through a first cooling circulation pipe, a second cooling circulation pipe, and a third cooling circulation pipe to transport cooling medium to form a segmented cooling circulation system; the driving device includes a first motor and a second motor respectively connected to the hot mixing cylinder and the cold mixing cylinder; The metal powder enters the hot mixing cylinder through the feed hopper for hot mixing, and the hot mixed mixture enters the cold mixing cylinder from the discharge port of the hot mixing cylinder for cold mixing and is finally discharged; The cooling chamber further comprises a fourth cooling chamber, the fourth cooling chamber being arranged below the third cooling chamber, and the cooling device being connected to the fourth cooling chamber via a fourth cooling circulation pipe; A temperature sensor is provided in the heat mixing cylinder, and the mixing device is also provided with a controller; The powder coating mixing workflow is as follows: first, start the mixing equipment, add powder, drive the stirring device to rotate and stir, and the cooling device synchronously circulates cold water to the first cooling chamber, the second cooling chamber, and the third cooling chamber on the top, bottom, and side wall of the hot mixing cylinder, and forms a circulating water circuit to exchange heat with the powder in the hot mixing cylinder; then, the temperature sensor senses the powder temperature and transmits the powder temperature signal to the controller, and the controller controls the cooling device to transport cooling water to the fourth cooling chamber through the fourth cooling circulation pipe, and forms a circulating water circuit to exchange heat with the powder in the hot mixing cylinder; after stirring, the powder in the hot mixing cylinder enters the cold mixing cylinder from the discharge port of the hot mixing cylinder for cooling treatment, and the cooling device transports cooling water to the fifth cooling chamber of the cold mixing cylinder to exchange heat with the mixed material in the cold mixing cylinder; finally, the discharge port of the cold mixing cylinder is opened to discharge the material.

2. The precise temperature-controlled metal powder coating mixing equipment according to claim 1, characterized in that: The first cooling chamber, the second cooling chamber, the third cooling chamber and the fourth cooling chamber are respectively provided with a water inlet and a water outlet.

3. The precise temperature-controlled metal powder coating mixing equipment according to claim 1, characterized in that: The mixing equipment is further provided with a dust filtering assembly; the dust filtering assembly comprises an air filter element connected to the hot mixing cylinder and an induced draft fan for guiding air.

4. The precise temperature-controlled metal powder coating mixing equipment according to claim 1, characterized in that: The rack is arranged in an "n"-shaped structure.

5. The precise temperature-controlled metal powder coating mixing equipment according to claim 1, characterized in that: The stirring device includes a rotating shaft and a plurality of stirring blades fixed on the rotating shaft. The lengths of the stirring blades increase from top to bottom, and the stirring blade at the top is provided with a downwardly inclined scraper.

6. The precise temperature-controlled metal powder coating mixing equipment according to claim 5, characterized in that: The rotating shaft is provided with a hollow inner cavity, and the cooling device is connected to the hollow inner cavity via a fifth circulating cooling pipe.

7. The precise temperature-controlled metal powder coating mixing equipment according to claim 1, characterized in that: The frame is further provided with a first air-permeable filter core and a second air-permeable filter core which are respectively connected with the hot mixing cylinder and the cold mixing cylinder.

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