Annular extrusion coating device

Abstract

The present invention discloses an annular extrusion coating device, comprising an annular product extruded and formed by an extruder head, a coating device comprising a processing orifice plate for the product to pass through, and a revolution structure that revolves around the outer circumference of the product, the revolution structure also being provided with a rotation structure, the rotation structure being provided with a coating roller, the coating roller being adapted to engage with the outer wall of the product to perform coating operations, and the revolution structure being able to drive the rotation structure to rotate as it revolves around the product. This device combines the revolution structure with the rotation structure, enabling the coating roller to rotate under the drive of the rotation structure while revolving around the product, thereby enabling continuous coating operations on the outer circumference of the product. Driven by the rotation structure, the coating roller can turn inward to contact the product, and turn outward to contact the coating carrier layer, thereby enabling continuous replenishment of coating to the coating roller during its rotation, thereby facilitating clear and uniform coating on the product surface and improving product quality.

Description

Technical Field

[0001] The invention relates to the technical field of coating equipment, in particular to an annular extrusion coating device. Background Art

[0002] The extruder is an important machine used for plastic processing, which originated in the 18th century. The extruder head can be divided into right-angle head and bevel head according to the direction of the material flow in the head and the angle between the center line of the screw. The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the material, and then form it through the die. Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders, and rare multi-screw extruders and screwless extruders. For the production of cylindrical hollow plastic parts, annular extruders are usually used, such as for the extrusion of plastic pipes or plastic films; for the product, the outer wall of the annular extrusion must also be coated to meet the customer's requirements for printing trademarks, patterns, etc. on the outer surface of the product;

[0003] In the prior art, for flattenable plastic film annular products, a structure such as that disclosed in an online extrusion coater in application number CN201921737877.3 is often used for surface coating, i.e., a structure for coating the surface of flat film products; however, it is not possible to coat non-deformable plastic tubular products.

[0004] If coating is required for tubular products, the prior art often adopts a structure such as that disclosed in a paint coating device with application number CN201420545805.X, in which the pipe is placed section by section on two coating steel rods for coating. Although it can coat tubular workpieces, it cannot coat simultaneously during online extrusion, resulting in low production efficiency.

[0005] In view of the above, it is necessary to propose an annular extrusion coating device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the above technical problems and to provide an annular extrusion coating device that can simultaneously perform coating online and is suitable for surface coating processing of annular films or round tubes.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an annular extrusion coating device, including an annular product extruded by an extruder head, the coating device including a processing hole plate for the product to pass through, the product passing through the center of the processing hole plate, and also including a revolution structure that revolves around the outer circumference of the product, the revolution structure is also provided with a rotation structure, the rotation structure is provided with a coating roller, the coating roller can be in contact with the outer wall of the product to implement the coating operation, and the revolution structure can drive the rotation structure to rotate when it revolves around the product.

[0008] Furthermore, the processing hole plate is fixedly arranged, and the rotation structure includes a rotating ring, which is coaxially arranged with the processing hole plate. The rotating ring is rotatably connected and arranged on one side of the processing hole plate, and at least one rotation structure is provided on the inner side wall of the rotating ring.

[0009] Furthermore, a circular track is provided on one end face of the processing hole plate, and a track slider that matches the circular track is provided on one end face of the rotating ring. The track slider provided on the side of the rotating ring is placed in the circular track, so that the rotating ring is rotatably connected to the processing hole plate.

[0010] Furthermore, the rotating ring is provided with a rotating shaft for installing the rotating structure, and the rotating shaft is arranged perpendicular to the side end face of the rotating ring. The rotating structure includes a rotating gear, and the rotating gear is rotatably connected to the rotating shaft. A mounting bracket for installing the coating roller is fixedly connected to one side of the rotating gear. An inner gear ring 1 is provided on the inner periphery of the processing hole plate, and the rotating gear is meshed with the inner gear ring 1.

[0011] Furthermore, it also includes a paint supply structure, which includes a paint supply ring. The paint supply ring is a cylindrical ring structure. The paint supply ring is fixedly arranged on the side of the processing hole plate away from the rotating ring. The paint supply ring and the processing hole plate are coaxially arranged. The outer wall of the paint supply ring is connected to a paint supply pipe, and the inner wall of the paint supply ring is provided with a paint carrying layer. When the coating roller rotates toward the outside, it can contact the paint carrying layer.

[0012] Furthermore, a cavity is provided in the interior of the paint supply ring, and a plurality of paint nozzles are arranged around the cavity. The plurality of paint nozzles are connected to the paint supply pipe, and the spray ends of the paint nozzles are arranged toward the paint carrying layer.

[0013] Furthermore, multiple annular products are extruded from the extruder head, and multiple processing orifice plates are provided corresponding to the products. Multiple processing orifice plates are formed on the fixed plate, and each processing orifice plate is provided with a rotation structure and a revolution structure.

[0014] Furthermore, it also includes a synchronous drive structure that can drive multiple coating devices to operate simultaneously, wherein an outer gear ring 1 is fixedly provided on the outer periphery of the rotating ring, and the synchronous drive structure includes a synchronous gear ring, and an inner gear ring 2 is provided on the inner periphery of the synchronous gear ring, and multiple rotating rings form an internal meshing connection with the inner gear ring 2 of the synchronous gear ring through the outer gear ring 1.

[0015] Furthermore, a plurality of coating devices are distributed in a circular array on the fixed plate, and the synchronous ring gear is rotatably connected to the fixed plate.

[0016] Furthermore, a second outer gear ring is provided on the outer periphery of the synchronous gear ring, and a driving tooth is rotatably connected to the fixed plate. The wheel driving gear is engaged with the second outer gear ring, and a driving motor is provided on the fixed plate, and the output end of the driving motor is connected to the driving gear.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This device combines the revolution structure with the rotation structure, which enables the coating roller to rotate around the product while being revolved around the product, and to rotate under the drive of the rotation structure, so that the coating operation can be continuously performed on the periphery of the product.

[0019] 2. Driven by the self-rotating structure, the coating roller can turn inward to contact the product, and turn outward to contact the coating carrying layer, so that the coating roller can be continuously replenished with paint during the rotation, which is conducive to clear and uniform coating on the product surface and improve product quality.

[0020] 3. This device has high processing efficiency and can coat multiple products simultaneously on a die head with multiple extrusion holes. The synchronous drive structure can simultaneously drive the rotating rings in each coating device to rotate simultaneously, effectively improving efficiency.

[0021] 4. The paint carrying layer arranged on the inner side of the paint supply ring can absorb and retain the paint sprayed from the paint nozzle on one side to prevent the paint from falling on the product; on the other hand, it can allow the paint to penetrate from the outside to the inside, making it easier for the coating roller to dip into the paint when it rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the axonometric views of the first embodiment of the annular extrusion coating device of the present invention;

[0023] Figure 2 This is the second axonometric view of the first embodiment of the annular extrusion coating device of the present invention;

[0024] Figure 3 Schematic diagram of the interior cross section of the coating supply ring of the present invention;

[0025] Figure 4 This is one of the axonometric views of the third embodiment of the annular extrusion coating device of the present invention;

[0026] Figure 5 This is the second axonometric view of the third embodiment of the annular extrusion coating device of the present invention;

[0027] Figure 6 This is an exploded view of Example 3 of the annular extrusion coating device of the present invention;

[0028] In the figure: 1. Machine head; 2. Product; 3. Processing hole plate; 4. Coating roller; 5. Rotating ring; 6. Annular track; 7. Track slider; 8. Rotating shaft; 9. Rotating gear; 10. Mounting frame; 11. Inner gear ring 1; 12. Paint supply ring; 13. Paint carrying layer; 14. Cavity; 15. Paint nozzle; 16. Fixed plate; 17. Outer gear ring 1; 18. Synchronous gear ring; 19. Inner gear ring 2; 20. Outer gear ring 2; 21. Drive gear; 22. Drive motor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] A ring-shaped extrusion coating device includes a ring-shaped product 2 extruded by an extruder head 1, and the coating device includes a processing hole plate 3 for the product 2 to pass through. After the ring-shaped product 2 extruded by the extruder is cooled and shaped, the product 2 passes through the center of the processing hole plate 3. The coating device in this device includes a revolution structure that revolves around the outer periphery of the product 2 and a rotation structure driven by the revolution structure. The rotation structure is connected to the revolution structure and is provided with a coating roller 4. The coating roller 4 can fit with the outer wall of the product 2, so that the outer surface of the product 2 is coated by the coating roller 4. When the revolution structure revolves around the product 2, it can drive the rotation structure to rotate.

[0031] Example 1:

[0032] like Figure 1 、 Figure 2 As shown, the processing hole plate 3 in this embodiment is fixed, and a circular hole is provided in the center of the processing hole plate 3 for the product 2 to pass through. The self-rotation structure includes a rotating ring 5, which is in a circular ring shape. The rotating ring 5 is coaxially arranged with the processing hole plate 3, and enables the rotating ring 5 to rotate freely relative to the processing hole plate 3. The rotating ring 5 rotates with the axis of the circular hole of the processing hole plate 3 as the axis. Specifically, an annular track 6 is provided on one end face of the processing hole plate 3, and a track slider 7 is provided on one end face of the rotating ring 5 that cooperates with the annular track 6. The track slider 7 provided on the side of the rotating ring 5 is placed in the annular track 6, so that the rotating ring 5 is rotatably connected to the processing hole plate 3, and the rotating ring 5 can achieve free rotation through the cooperation of the track slider 7 and the annular track 6.

[0033] At least one self-rotating structure is provided on the inner wall of the rotating ring 5; a self-rotating shaft 8 for installing the self-rotating structure is provided on the rotating ring 5. As shown in the figure, the self-rotating shaft 8 is fixedly provided on the side of the convex block protruding inward on the inner wall of the rotating ring 5, so that the self-rotating shaft 8 is arranged perpendicular to the side end face of the rotating ring 5, and a self-rotating structure is provided on the self-rotating shaft 8; specifically, the self-rotating structure includes a self-rotating gear 9, which is rotatably connected and arranged on the self-rotating shaft 8, and a mounting bracket 10 for mounting the coating roller 4 is fixedly connected and arranged on one side of the self-rotating gear 9. In order to drive the self-rotating gear 9 to rotate, an inner gear ring 11 is provided on the inner wall of the circular hole on the inner periphery of the processing hole plate 3, so that the self-rotating gear 9 and the inner gear ring 11 form an internal meshing connection. In this way, when the rotating ring 5 rotates, the self-rotating shaft 8 can be made to rotate around the product 2, that is, the self-rotating gear 9 rotates around the product 2, and the processing hole plate 3 is fixedly provided, and the meshing of the inner gear ring 11 and the self-rotating gear 9 is used to The mounting frame 10 installed on the autorotating gear 9 is driven to rotate and revolve, and then the coating roller 4 set on the mounting frame 10 can be used to coat the outer wall of the product 2. It can be understood that when the coating roller 4 is installed on the side of the mounting frame 10, as the mounting frame 10 rotates, the coating roller 4 can approach and move away from the product 2. When the coating roller 4 approaches the product 2, it can be coated, and when it moves away from the product 2, it will not be coated. In actual use, the distance between the coating roller 4 and the rotation axis of the mounting frame 10 can be controlled, thereby controlling the distance between the coating roller 4 and the surface of the product 2. When the rotating shaft of the coating roller 4 coincides with the rotating shaft of the mounting frame 10, the outer surface of the product 2 can be completely coated without any gap; the above-mentioned distance can be set according to user needs to achieve the expected coating effect; multiple autorotation structures can also be set according to the coating effect, so that multiple coating rollers 4 are arranged in a central symmetrical manner, which can improve the coating efficiency.

[0034] It can be understood that when the extruded product 2 is a hard plastic tube, the coating roller 4 can easily coat its outer wall; if the product 2 is a plastic film, since it is soft and not supportive, the structure of the extrusion hole of the head 1 can be improved, and a rod for support can be extended outward from the extrusion hole, so that the diameter of the rod is matched with the inner diameter of the product 2. When in use, the product 2 film is put on the outside of the rod, and the coating roller 4 then coats the product 2.

[0035] Example 2:

[0036] When coating the product 2, it is necessary to continuously add coating to the coating roller 4. According to one embodiment: as the mounting frame 10 rotates, the coating roller 4 can approach and move away from the product 2. When the coating roller 4 approaches the product 2, coating can be performed, and when it moves away from the product 2, no coating is performed. In this embodiment, the coating roller 4 is replenished with coating when the coating roller 4 is away from the product 2. Specifically, the coating supply structure includes a coating supply ring 12, and the coating supply ring 12 is a cylindrical ring structure. The inner wall of the coating supply ring 12 is provided with a coating carrying layer 13. The coating supply ring 12 is coaxially arranged with the processing hole plate 3, and the coating supply ring 12 is fixedly arranged on the side of the processing hole plate 3 away from the rotating ring 5. The inner diameter of the coating supply ring 12 should be set according to actual conditions, that is, the inner diameter of the coating supply ring 12 is set with a reference to the distance between the edge of the coating roller 4 and the axis of the product 2 when the coating roller 4 rotates toward the outside of the product 2. In this way, when the coating roller 4 rotates to the outside, the outer wall of the coating roller 4 can fit on the coating carrying layer 13 on the inner wall of the coating supply ring 12, so that the coating roller 4 can be replenished; the outer wall of the coating supply ring 12 is connected with a coating supply pipe, and the coating carrying layer 13 is replenished with coating through the coating supply pipe.

[0037] Specific examples Figure 3 As shown, the paint supply ring 12 is hollow inside and is provided with a cavity 14, and a plurality of paint nozzles 15 are arranged around the cavity 14, and the plurality of paint nozzles 15 are connected to the paint supply pipe, and the spray end of the paint nozzle 15 is arranged toward the paint carrying layer 13; the paint supply pipe sprays the paint evenly on the outer side of the paint carrying layer 13, and the paint carrying layer 13 is a layered structure that can absorb and carry the paint without causing the paint to drip, and allows the paint to penetrate to the inner side. The paint carrying layer 13 should have a certain elasticity, so that the coating roller 4 can be squeezed on the paint carrying layer 13 when it rotates to the outside. The depression caused by the squeezing can increase the contact area, so that the coating roller 4 can be replenished with paint on all sides during continuous rotation. In actual use, the paint carrying layer 13 can be made of a sponge with a certain density, or made of other porous materials. It can be understood that the paint carrying layer 13 can be provided with an appropriate support structure to maintain its circular shape.

[0038] Example 3:

[0039] In actual use, the extruder head 1 has not only a single hole for discharging, but also multiple holes for discharging at the same time. When multiple holes are discharging at the same time, the production efficiency of the product 2 can be improved. Therefore, the device is improved in an adaptive manner, such as Figure 4-Figure 6 As shown, when multiple annular products 2 are extruded from the head 1 of the extruder, multiple processing orifice plates 3 are also provided correspondingly, so that the processing orifice plates 3 can correspond one-to-one to each product 2. In this embodiment, multiple processing orifice plates 3 are formed on the fixed plate 16, and each processing orifice plate 3 is provided with a rotation structure and a revolution structure.

[0040] In order to conveniently drive the simultaneous operation of each rotation structure and revolution structure, a synchronous driving structure capable of driving multiple coating devices to operate simultaneously is provided in this embodiment; specifically, Figure 4-Figure 6 As shown, the outer circumference of the rotating ring 5 is fixedly provided with an outer ring gear 17. The synchronous drive structure includes a synchronous ring gear 18, and the inner circumference of the synchronous ring gear 18 is provided with an inner ring gear 19. Multiple rotating rings 5 ​​are internally meshed with the inner ring gear 19 of the synchronous ring gear 18 through the outer ring gear 17. The synchronous ring gear 18 is rotatably connected to the fixed plate 16. In actual installation, it is preferable to distribute multiple coating devices in a circular array on the fixed plate 16, so that multiple rotating rings 5 ​​can be connected to the synchronous ring gear 18 in an inscribed shape. Furthermore, an outer ring gear 20 is provided on the outer periphery of the synchronous ring gear 18, and a drive gear 21 is also rotatably connected on the fixed plate 16. The drive gear 21 is engaged with the outer ring gear 20, and a drive motor 22 is provided on the fixed plate 16. The output end of the drive motor 22 is connected to the drive gear 21; in this way, when the drive motor 22 drives the synchronous ring gear 18 to rotate through the drive gear 21, it can simultaneously drive the various rotating rings 5 ​​inside it to rotate, and then the self-rotating gear 9 rotates accordingly, so that each coating roller 4 can perform coating operations on each product 2, which can greatly improve the coating efficiency.

[0041] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An annular extrusion coating device, comprising an annular product (2) extruded by an extruder head (1), characterized in that: The coating device comprises a processing hole plate (3) for the product (2) to pass through, the product (2) passing through the center of the processing hole plate (3), and also comprises a revolution structure that revolves around the outer periphery of the product (2), the revolution structure is also provided with a self-rotation structure, and the self-rotation structure is provided with a coating roller (4), the coating roller (4) can be in contact with the outer wall of the product (2) to perform the coating operation, and the revolution structure can drive the self-rotation structure to rotate when it revolves around the product (2); The processing hole plate (3) is fixedly arranged, and the revolution structure includes a rotating ring (5), the rotating ring (5) is coaxially arranged with the processing hole plate (3), the rotating ring (5) is rotatably connected and arranged on one side of the processing hole plate (3), and the inner side wall of the rotating ring (5) is provided with at least one self-rotation structure; An annular track (6) is provided on one end surface of the processing hole plate (3), and a track slider (7) that matches the annular track (6) is provided on one end surface of the rotating ring (5). The track slider (7) provided on the side of the rotating ring (5) is placed in the annular track (6), so that the rotating ring (5) is rotatably connected to the processing hole plate (3); The rotating ring (5) is provided with a rotating shaft (8) for mounting a rotating structure, and the rotating shaft (8) is arranged perpendicular to the side end face of the rotating ring (5). The rotating structure includes a rotating gear (9), and the rotating gear (9) is rotatably connected to the rotating shaft (8). A mounting frame (10) for mounting a coating roller (4) is fixedly connected to one side of the rotating gear (9). An inner gear ring (11) is provided on the inner periphery of the processing hole plate (3), and the rotating gear (9) is meshed with the inner gear ring (11).

2. An annular extrusion coating device according to claim 1, characterized in that, The invention also includes a coating supply structure, wherein the coating supply structure includes a coating supply ring (12), the coating supply ring (12) is a cylindrical ring structure, the coating supply ring (12) is fixedly arranged on a side of the processing hole plate (3) away from the rotating ring (5), the coating supply ring (12) and the processing hole plate (3) are coaxially arranged, the outer wall of the coating supply ring (12) is connected to a coating supply pipe, the inner wall of the coating supply ring (12) is provided with a coating carrying layer (13), and the coating roller (4) can contact the coating carrying layer (13) when rotating toward the outside.

3. An annular extrusion coating device according to claim 2, characterized in that, The paint supply ring (12) is hollowed out and provided with a cavity (14). A plurality of paint nozzles (15) are arranged around the cavity (14). The plurality of paint nozzles (15) are connected to a paint supply pipe, and the spray ends of the paint nozzles (15) are arranged toward the paint carrying layer (13).

4. An annular extrusion coating device according to claim 1 or 2, characterized in that, A plurality of annular products (2) are extruded from the head (1) of an extruder. A plurality of processing orifice plates (3) are provided corresponding to the products (2). The plurality of processing orifice plates (3) are formed on a fixed plate (16). Each processing orifice plate (3) is provided with a self-rotating structure and a revolution structure.

5. The annular extrusion coating device according to claim 4, characterized in that: The invention also includes a synchronous drive structure capable of driving a plurality of coating devices to operate simultaneously, wherein an outer ring gear 1 (17) is fixedly provided on the outer periphery of the rotating ring (5), and the synchronous drive structure includes a synchronous ring gear (18), and an inner ring gear 2 (19) is provided on the inner periphery of the synchronous ring gear (18), and the plurality of rotating rings (5) are connected to each other in an internal meshing manner with the inner ring gear 2 (19) of the synchronous ring gear (18) through the outer ring gear 1 (17).

6. The annular extrusion coating device according to claim 5, characterized in that: A plurality of coating devices are distributed in a circumferential array on the fixed plate (16), and the synchronous gear ring (18) is rotatably connected and arranged on the fixed plate (16).

7. The annular extrusion coating device according to claim 6, characterized in that: The outer periphery of the synchronous gear ring (18) is provided with an outer gear ring 2 (20), and the fixed plate (16) is also rotatably connected to a driving gear (21), the driving gear (21) is engaged with the outer gear ring 2 (20), and the fixed plate (16) is provided with a driving motor (22), the output end of the driving motor (22) is connected to the driving gear (21).

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