Coating machine

Abstract

The utility model discloses a coating machine which comprises a machine frame and a roller rotationally arranged on the machine frame, the two ends of the roller are provided with a feeding port and a discharging port respectively, a coating area close to the feeding port is arranged in the roller, the coating area is provided with a spraying and coating mechanism used for spraying coating liquid to materials to conduct coating, and the spraying and coating mechanism is provided with a spraying and coating mechanism used for spraying coating liquid to the materials to conduct coating. A heating mechanism is fixedly arranged on the machine frame, the heating mechanism is located outside the roller and matched with the roller in a rotating mode, sealing assemblies are arranged between the two ends of the heating mechanism and the roller respectively, and an air inlet and an air outlet are formed in the roller. The coating machine has the advantages of improving heating and drying effects and product quality, being high in adaptability and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of food and pharmaceutical packaging machinery and equipment, specifically to a coating machine. Background Technology

[0002] Chinese patent application No. 202021103578.7 discloses a flow layer coating machine, specifically including a machine body and a roller. The roller is horizontally and rotatably sealed and installed in the machine body. The flow layer coating machine also includes a support, a spray gun assembly, and multiple sets of feeders. The roller adopts a non-perforated structure, with a tapered constriction structure at both ends of the roller's axial direction. Multiple sets of feeders are evenly spaced on the inner wall of the roller along its axial direction. The support is a hollow rod structure, which is inserted into the roller from the rear end of the machine body along its axial direction from the outside to the inside. The end of the support is fixedly installed on the machine body. The spray gun assembly includes a coating liquid pipeline, a spray gun mounting bracket, and multiple spray guns. The spray gun mounting bracket is installed diagonally above the rear middle section of the support. The spray gun mounting bracket is a hollow rod structure, and the coating liquid pipeline is located inside the spray gun mounting bracket. Multiple spray guns are evenly spaced on the spray gun mounting bracket from front to back along its axial direction. The inner cavity of each spray gun is sealed and connected to the coating liquid pipeline. Its working principle: Solid granular material enters the drum from the front opening. The motor drives the drum to rotate, and under the action of the drum and the feeder, the material is pushed from front to back, achieving multiple tumbling of the material. At the same time, the spray gun sprays coating liquid, completing the all-round coating process of the material. The air intake and exhaust system dries the material through the air inlet and outlet. This fluidized bed coating machine has the following shortcomings:

[0003] 1) The spray gun mounting bracket is installed diagonally above the middle rear section of the support, and its tail end is close to the rear opening of the roller, which causes the coating material in the rear section to dry incompletely, affecting the quality of the product.

[0004] 2) Heating gas enters the drum through the air inlet to heat and dry the coated material. The heating gas comes into direct contact with the coated material, which can easily cause the easily oxidized coated material to deteriorate due to high-temperature oxidation, making it unsuitable for the processing and production of easily oxidized materials. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a coating machine that improves heating and drying effect and product quality and has strong adaptability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A coating machine includes a frame and a roller rotatably mounted on the frame. The roller has an inlet and an outlet at its two ends. The roller has a coating zone near the inlet inside, and the coating zone has a spray coating mechanism for spraying coating liquid onto the material. A heating mechanism is fixed on the frame and is located outside the roller and rotates with the roller. Sealing components are provided between the two ends of the heating mechanism and the roller. The roller has an air inlet and an exhaust outlet.

[0008] As a further improvement to the above technical solution:

[0009] The heating mechanism includes a heating chamber, the roller is inserted into the heating chamber, the heating chamber has a medium inlet and a medium outlet, and the sealing components are located at both ends of the heating chamber.

[0010] The heating mechanism further includes a heating jacket fixed on the frame, the heating jacket being sleeved outside the drum and rotating in cooperation with the drum, the heating chamber being formed between the drum and the heating jacket, the sealing assembly being disposed between the drum and the heating jacket, and the medium inlet and medium outlet being disposed on the heating jacket.

[0011] The heating jacket and the roller are connected by bearings. The sealing assembly includes a lip seal and an O-ring. The frame is provided with support wheels, and the roller is supported on the support wheels.

[0012] The medium inlet is close to the outlet and located at the bottom of the heating jacket, and the medium outlet is close to the inlet and located at the top of the heating jacket.

[0013] The spray coating mechanism includes a mounting rod and a spray gun. The mounting rod is located in the coating area, and the spray gun is mounted on the mounting rod.

[0014] The frame is equipped with a rotary drive mechanism for driving the drum to rotate.

[0015] The rotary drive mechanism includes a drive component, a transmission gear, and a gear ring. The drive component and the transmission gear are both mounted on the frame. The gear ring is fitted onto the roller. The transmission gear meshes with the gear ring and is connected to the output shaft of the drive component.

[0016] The frame has a feeding chamber at the feed inlet of the roller, the spray coating mechanism is fixed in the feeding chamber, and the top of the feeding chamber has a feeding door.

[0017] The frame has a discharge chamber at the discharge port of the roller, and a discharge gate is provided at the bottom of the discharge chamber.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] The working process of this coating machine is as follows: The heating mechanism heats the drum from the outside. The material enters through the drum's feed inlet, passes through the coating zone and the heating zone formed behind the coating zone, and is then output through the discharge outlet. First, the material passes through the coating zone where the coating liquid is sprayed by the spray coating mechanism to complete the coating. Then, it passes through the rear heating zone for further heating. Because the coating zone is close to the feed inlet, the heating zone at the rear of the drum is longer, improving the heating and drying effect and thus improving product quality. Second, the heating mechanism heats the drum from the outside, without direct contact with the material inside the drum. This results in more uniform heating and reduces the risk of high-temperature oxidation and deterioration of easily oxidized coating materials. This makes it suitable for processing easily oxidized materials and demonstrates strong adaptability. Attached Figure Description

[0020] Figure 1 This is a top view of the coating machine of this utility model.

[0021] Figure 2 This is a schematic diagram of the main cross-sectional structure of the coating machine of this utility model.

[0022] Figure 3 yes Figure 2 A magnified structural diagram of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the left side of the coating machine of this utility model.

[0024] Figure 5 This is a schematic diagram of the right side of the coating machine of this utility model.

[0025] The labels in the diagram represent:

[0026] 1. Drum; 11. Feed inlet; 12. Discharge outlet; 2. Coating area; 3. Spray coating mechanism; 31. Mounting rod; 32. Spray gun; 4. Heating mechanism; 41. Heating chamber; 42. Medium inlet; 43. Medium outlet; 44. Heating jacket; 45. Bearing; 5. Air inlet; 6. Exhaust outlet; 7. Frame; 71. Feed chamber; 711. Feed gate; 72. Discharge chamber; 721. Discharge gate; 73. Support wheel; 8. Rotary drive mechanism; 81. Drive component; 82. Transmission gear; 83. Gear ring; 9. Sealing assembly; 91. Lip seal; 92. O-ring seal. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 utility model 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 utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Figures 1 to 5 This invention illustrates an embodiment of the coating machine. The coating machine of this embodiment includes a frame 7 and a roller 1 rotatably mounted on the frame 7. The roller 1 has an inlet 11 and an outlet 12 at its two ends, respectively. The roller 1 has a coating area 2 located near the inlet 11 inside. The coating area 2 is equipped with a spray coating mechanism 3 for spraying coating liquid onto the material. A heating mechanism 4 is fixedly mounted on the frame 7. The heating mechanism 4 is located outside the roller 1 and rotates with the roller 1. Sealing components 9 are provided between the two ends of the heating mechanism 4 and the roller 1, respectively. The roller 1 has an air inlet 5 and an exhaust outlet 6.

[0032] The working process of this coating machine is as follows: The heating mechanism 4 heats the drum 1 from the outside. The material enters the drum 1 through the feed port 11, passes through the coating zone 2 and the heating zone formed behind the coating zone 2, and is then output through the discharge port 12. The heating mechanism 4 heats the drum 1 from the outside, without direct contact with the material inside the drum 1. This ensures more uniform heating of the material during the heating process, reducing the risk of high-temperature oxidation and deterioration of easily oxidized coating materials. It is suitable for processing easily oxidized materials and has strong adaptability.

[0033] Furthermore, the material first passes through the coating zone 2 where the coating liquid is sprayed by the spray coating mechanism 3 to complete the coating and preliminary preheating of the material, and then passes through the rear heating zone for heating. Since the coating zone 2 is close to the feed inlet 11, the heating zone at the rear of the roller 1 is longer, which improves the heating and drying effect and thus improves the product quality.

[0034] Furthermore, in this embodiment, the heating mechanism 4 includes a heating chamber 41, with the roller 1 passing through it. The heating chamber 41 has a medium inlet 42 and a medium outlet 43, and sealing components 9 are located at both ends of the heating chamber 41. The sealing components 9, located at both ends of the heating chamber 41, create a sealed space within the heating chamber 41. The heating medium enters the heating chamber 41 from the medium inlet 42 and flows out from the medium outlet 43, thus heating the roller 1.

[0035] Furthermore, such as Figure 2 and Figure 3 As shown, in this embodiment, the heating mechanism 4 further includes a heating jacket 44 fixed on the frame 7. The heating jacket 44 is sleeved outside the drum 1 and rotatably engages with the drum 1. The heating cavity 41 is formed between the drum 1 and the heating jacket 44. The sealing assembly 9 is disposed between the drum 1 and the heating jacket 44. The medium inlet 42 and the medium outlet 43 are both disposed on the heating jacket 44. Specifically, the sealing assembly 9 rotates and seals with the drum 1, which neither affects the rotational movement of the drum 1 relative to the heating jacket 44, nor does it affect the sealing of the heating cavity 41.

[0036] Furthermore, such as Figure 3 As shown, in this embodiment, the heating jacket 44 and the roller 1 are engaged by a bearing 45. The sealing assembly 9 includes a lip seal 91 and an O-ring seal 92. A support wheel 73 is provided on the frame 7, and the roller 1 is supported on the support wheel 73. Preferably, the bearing 45 is located outside the lip seal 91, and the O-ring seal 92 is located inside the lip seal 91.

[0037] Furthermore, in this embodiment, the medium inlet 42 is located near the discharge port 12 and at the bottom of the heating jacket 44, while the medium outlet 43 is located near the feed port 11 and at the top of the heating jacket 44. In this way, the heating medium enters from the medium inlet 42, flows along the internal space of the drum 1 to the medium outlet 43, and then flows out from the medium outlet 43, increasing the heating length. Overall, the flow direction of the medium is opposite to the material conveying direction, and the temperature gradually increases with the material flow direction, making the material heating rate controllable and improving the heating and drying effect.

[0038] Furthermore, in this embodiment, the spray coating mechanism 3 includes a mounting rod 31 and a spray gun 32. The mounting rod 31 is disposed within the coating area 2, and the spray gun 32 is disposed on the mounting rod 31. Preferably, multiple spray guns 32 are provided and arranged at intervals along the length direction of the mounting rod 31. More preferably, the mounting rod 31 extends axially along the roller 1, and the spray gun 32 is disposed at the bottom of the mounting rod 31.

[0039] Furthermore, such as Figure 4 and Figure 5 As shown, in this embodiment, the frame 7 is provided with a rotary drive mechanism 8 for driving the roller 1 to rotate.

[0040] Furthermore, in this embodiment, as Figure 1 and Figure 2 As shown, the rotary drive mechanism 8 includes a drive element 81, a transmission gear 82, and a gear ring 83. Both the drive element 81 and the transmission gear 82 are mounted on the frame 7. The gear ring 83 is fitted onto the drum 1. The transmission gear 82 meshes with the gear ring 83 and is connected to the output shaft of the drive element 81. The drive element 81 drives the drum 1 to rotate via the transmission gear 82 and the gear ring 83. Preferably, the gear ring 83 is located on the end side of the heating jacket 44.

[0041] Furthermore, in this embodiment, the frame 7 is provided with a feeding chamber 71 at the feeding port 11 of the roller 1, the spray coating mechanism 3 is fixed in the feeding chamber 71, and the top of the feeding chamber 71 is provided with a feeding gate 711. The feeding port 11 is connected to the feeding chamber 71, and the material enters the feeding chamber 71 through the feeding gate 711, and then enters the roller 1 through the feeding port 11 under the action of the rotation of the roller 1.

[0042] Furthermore, in this embodiment, a pusher plate is provided on the inner wall of the roller 1. When the roller 1 rotates, the pusher plate drives the material inside to be conveyed from the feed port 11 to the discharge port 12.

[0043] Furthermore, in this embodiment, the frame 7 is provided with a discharge chamber 72 at the discharge port 12 of the roller 1, and a discharge gate 721 is provided at the bottom of the discharge chamber 72. The discharge port 12 is connected to the discharge chamber 72, and the material enters the discharge chamber 72 from the discharge port 12. The material in the discharge chamber 72 can be discharged from the discharge gate 721.

[0044] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A coating machine, comprising a frame (7) and a roller (1) rotatably mounted on the frame (7), wherein the roller (1) has an inlet (11) and an outlet (12) at its two ends, characterized in that: The drum (1) has a coating area (2) located near the feed inlet (11) inside. The coating area (2) is equipped with a spray coating mechanism (3) for coating the material with spray coating liquid. A heating mechanism (4) is fixed on the frame (7). The heating mechanism (4) is located outside the drum (1) and rotates with the drum (1). Sealing components (9) are respectively provided between the two ends of the heating mechanism (4) and the drum (1). The drum (1) is equipped with an air inlet (5) and an exhaust outlet (6).

2. The coating machine according to claim 1, characterized in that: The heating mechanism (4) includes a heating chamber (41), the roller (1) passes through the heating chamber (41), the heating chamber (41) is provided with a medium inlet (42) and a medium outlet (43), and the sealing assembly (9) is located at both ends of the heating chamber (41).

3. The coating machine according to claim 2, characterized in that: The heating mechanism (4) further includes a heating jacket (44) fixed on the frame (7). The heating jacket (44) is sleeved on the outside of the drum (1) and rotates with the drum (1). The heating chamber (41) is formed between the drum (1) and the heating jacket (44). The sealing component (9) is located between the drum (1) and the heating jacket (44). The medium inlet (42) and the medium outlet (43) are both located on the heating jacket (44).

4. The coating machine according to claim 3, characterized in that: The heating jacket (44) and the roller (1) are connected by a bearing (45). The sealing assembly (9) includes a lip seal (91) and an O-ring seal (92). The frame (7) is provided with a support wheel (73), and the roller (1) is supported on the support wheel (73).

5. The coating machine according to claim 3, characterized in that: The medium inlet (42) is close to the outlet (12) and located at the bottom of the heating jacket (44), and the medium outlet (43) is close to the inlet (11) and located at the top of the heating jacket (44).

6. The coating machine according to claim 1, characterized in that: The spray coating mechanism (3) includes a mounting rod (31) and a spray gun (32). The mounting rod (31) is located in the coating area (2), and the spray gun (32) is located on the mounting rod (31).

7. The coating machine according to any one of claims 1 to 6, characterized in that: The frame (7) is provided with a rotary drive mechanism (8) for driving the drum (1) to rotate.

8. The coating machine according to claim 7, characterized in that: The rotary drive mechanism (8) includes a drive member (81), a transmission gear (82) and a gear ring (83). The drive member (81) and the transmission gear (82) are both mounted on the frame (7). The gear ring (83) is mounted on the roller (1). The transmission gear (82) meshes with the gear ring (83) and is connected to the output shaft of the drive member (81).

9. The coating machine according to claim 7, characterized in that: The frame (7) has a feeding chamber (71) at the feed inlet (11) of the roller (1), the spray coating mechanism (3) is fixed in the feeding chamber (71), and the top of the feeding chamber (71) has a feeding door (711).

10. The coating machine according to claim 7, characterized in that: The frame (7) is provided with a discharge chamber (72) at the discharge port (12) of the roller (1), and a discharge gate (721) is provided at the bottom of the discharge chamber (72).

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