A production line for easy-tear cover with re-coating and re-coating method

Abstract

The present invention relates to a tear-off cover production line with a re-coating function and a re-coating method for re-coating a cover ring taking hole (same as a middle hole) in an easy-tear cover production line, comprising an easy-tear cover production line, wherein a re-coating device is added between a middle hole bending and drawing device and a middle hole curling device of the easy-tear cover production line. Advantages: The design of the re-coating forming device for the cover ring of the easy-tear cover solves the rust defect caused by the cover ring incision not being coated with paint in the background technology, and ensures that the cover will not be corroded by the contents.

Description

Technical Field

[0001] The invention relates to an easy-tear cover production line with re-coating for re-coating a coating on a cutout of a cover ring taking hole (same as a middle hole) and a re-coating method, belonging to the field of manufacturing supporting workstations for easy-tear cover production lines. Background Art

[0002] In the existing easy-tear cover production line, there is no cover ring incision re-coating station, so the cover manufactured by it is easy to rust under the action of the contents after sealing the can, which not only directly affects the use of the cover, but also causes pollution to the contents. Summary of the invention

[0003] Design purpose: To avoid the shortcomings of the background technology, a re-coating production line and re-coating method for easy-tear covers are designed, which can re-coat the cover ring incision with paint.

[0004] Design scheme: In order to achieve the above-mentioned design objectives. In terms of structural design, the present invention adds a re-coating device between the middle hole bending and drawing device and the middle hole curling device of the easy-tear cover production line, which is the main technical feature of the present invention. The purpose of such a design is to set a cover ring incision re-coating device between the middle hole bending and drawing device and the middle hole curling device of the easy-tear cover production line. The re-coating device can complete the coating of the cover ring incision surface of the cover in the easy-tear cover production line, so that the cover ring incision surface of the cover that is originally exposed under the content after the can is sealed is sealed with paint (or plastic film), so that the contents in the can are in contact with the paint on the cover ring incision surface, and no oxidation or rust will occur, which solves the technical problems that have not been solved by the background technology for a long time, and brings unexpected technical effects, that is, the cover ring incision surface will not be oxidized or rusted, ensuring that the contents of the can are not contaminated after the can is sealed.

[0005] Technical Solution 1: A tear-off cover production line with re-coating, comprising an tear-off cover production line, wherein a re-coating device is added between a middle hole bending and drawing device and a middle hole curling device of the tear-off cover production line.

[0006] Technical Solution 2: A recoating method for an easy-to-tear cover production line with recoating. When the synchronous belt conveyor sends the punched middle hole and the drawn cover ring to the recoating station, the upper lifting drive device drives the upper positioning plate downward to position the cover ring to the inner hole of the upper positioning plate. The recoating plate is driven upward by the lower lifting platform to the middle hole of the cover ring to apply the paint on the cut surface of the middle hole of the cover ring. Then the recoating plate descends and is driven to rotate by the driving device, and is coated with the paint flowing out of the feed port. After coating, it is evenly scraped by a soft scraper. The cover ring is heated and dried by the drying device at the back, and then the curling device completes the curling.

[0007] Compared with the background technology, the design of the cover ring re-coating forming device of the easy-tear cover in the present invention solves the rust defect caused by the cover ring cutout not being coated with paint in the background technology, ensuring that the cover will not be corroded by the contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the production line for easy-tear lids with re-coating.

[0009] Figure 2 It is a structural schematic diagram of a cover ring re-coating and forming device for an easy-tear cover.

[0010] Figure 3 Schematic diagram of the top view of the paint return plate.

[0011] Figure 4 It is a schematic diagram of a cover ring drying device for an easy-tear cover production line.

[0012] Figure 5 yes Figure 4 Schematic side view of .

[0013] Figure 6 It is a second structural schematic diagram of the drying device.

[0014] Figure 7 yes Figure 6 Schematic diagram of the application in the production line of easy-peel lids.

[0015] Figure 8 Yes Figure 2 Further explanation of . DETAILED DESCRIPTION

[0016] Example 1: Refer to the attached Figure 1-5 A re-coating easy-tear cover production line includes an easy-tear cover production line, wherein a re-coating device 7a is added between a middle hole bending and drawing device 6a and a middle hole curling device 19a of the easy-tear cover production line.

[0017] One of the structures of the re-coating device 7a is as follows: the paint reflux tray 13 has an axial hole in the middle and is fixed on the frame, the paint reflux tray 13 has a feed port 12, the discharging coating head 17 is located on the inner wall of the paint reflux tray, the back of the re-coating tray 14 is connected to the drive shaft in the driving device 15, the upper positioning tray 11 is located above the paint reflux tray 13 and the upper positioning tray 11 is driven to rise or fall by the upper lifting driving device 10. Since the paint reflux tray has the function of feeding the spraying and re-coating cover ring cutout in terms of structure, it can also recycle the paint that falls into the paint reflux tray during the spraying and coating process; secondly, when there is a hole in the middle of the paint reflux tray, it can satisfy the rotation and lifting of the re-coating tray rotating shaft in the hole.

[0018] The purpose of the upper positioning plate being a groove structure and the inner edge of the groove being an arc-shaped chamfer is that: since the edge of the upper positioning plate (groove) is an arc-shaped chamfer, when it moves down to position the cover ring under the action of the lifting drive device, its arc-shaped edge can not only facilitate the cover to enter it and be accurately positioned, but also the arc-shaped edge will not cause damage to the positioned cover. Secondly, the upper positioning plate is located above the paint return plate and the upper positioning plate and the re-coating plate are relatively distributed in a one-rise-one-fall or one-fall-one-rise design. The purpose of this design is that: since the lower lifting device can satisfy the function of the re-coating plate rotation drive device to drive the re-coating plate to rotate, and can match the upper lifting device, when the upper positioning plate needs to position the cover, it can ensure that the upper positioning plate positions the cover, and can also satisfy that the cover ring can be pushed by the upper positioning plate into the positioning fixture of the synchronous belt conveying mechanism to prevent the cover ring from popping out and falling.

[0019] The second structure of the repainting device 7a: If the recovery of the paint dropped during the coating process is not considered, the paint return tray 13 can be designed as a paint tray without a recovery function.

[0020] The lifting drive device 10 is an electric lifting device or a pneumatic lifting device, or the lifting device 10 is synchronously driven by the lower lifting device (stage). The lifting drive device 10 is an electric lifting device or a pneumatic lifting device, but not limited to this. The driving device 15 is connected to the lower lifting device and the driving device 15 is driven to rise or fall by the lower lifting device. The driving device 15 is a synchronous motor or a servo motor, but not limited to this. The lower lifting device is an electric lifting device or a pneumatic lifting device, or the lower lifting device of the intermediate hole bending and drawing device 6a is borrowed, but not limited to this.

[0021] The discharge coating head 17 is a paint nozzle structure or a paint spraying structure with a brush or a flexible coating head, which has the function of feeding and spraying onto the re-coating disk 14, and a soft scraper 16 is provided on one side of the discharge coating head 17, which can evenly scrape the excess paint applied by the discharge coating head on the surface of the re-coating disk 14, that is, when the re-coating disk is rotating, the soft scraper can evenly scrape the paint coated on the surface of the re-coating disk 14, and the re-coating disk 14 rises to achieve uniform re-coating of the cut surface of the cover ring, thereby ensuring the drying effect of the subsequent drying station.

[0022] Embodiment 2: Based on Embodiment 1, a drying device A is provided after the re-coating device 7a.

[0023] One of the structures of drying device A: multiple grooves 3 for inserting cover rings are opened on the outside of the turntable, turntable gaskets 4 are installed in the grooves or on the sides of the grooves, the outside of the turntable is a toothed structure 7, and the turntable is covered with an oven 5. The driving device 2 cooperates with the toothed structure 7 on the outside of the turntable to drive the turntable to rotate. The driving device 2 refers to a gear mechanism, a sprocket mechanism, or a synchronous pulley mechanism. It should be pointed out that the oven 5 can be set with different partitions, and the cover ring can be heated and cooled, etc. The top of the oven 5 is provided with an exhaust port for exhausting waste gas.

[0024] Drying device A structure 2: refer to the attached Figure 6 The middle chain 106 is sleeved on the lower driving sprocket 102 and the upper driving sprocket 101 to form a sprocket chain transmission mechanism, and a plurality of cover ring slots 103 are fixed on the chain to form a cover ring conveying transmission mechanism. The inverted U-shaped oven 105 is covered on the cover ring conveying transmission mechanism. The inverted U-shaped oven 105 can be set with different partitions, and can perform functions such as heating and cooling on the cover ring. The upper end of the inverted U-shaped oven 105 is provided with an exhaust port 104.

[0025] In the present invention, one or two structures of the drying device A can be selected, and both can achieve the drying purpose of the present invention. Only the advantages of the two structures are different, and the best is structure one.

[0026] Embodiment 3: On the basis of Embodiment 1 or 2, a recoating method for an easy-to-tear cover production line with recoating is provided. When the synchronous belt conveyor mechanism sends the punched middle hole and the drawn cover ring to the recoating station, the upper lifting drive device 10 drives the upper positioning plate 11 downward to position the cover ring to the inner hole of the upper positioning plate 11, and the recoating plate 14 is driven upward by the lower lifting platform to the middle hole of the cover ring to print the paint on the cut surface of the middle hole of the cover ring, and then the recoating plate 14 descends and is driven to rotate by the driving device 15, and is coated with the paint flowing out of the feed port 12. After coating, it is evenly scraped by the soft scraper 16, and the cover ring is heated and dried by the drying device A at the back, and then the curling device completes the curling.

[0027] Figure 1 and Figure 7 Among them, 1a refers to the cover-splitting and cover-lowering device, 4a refers to the middle hole punching device, 6a refers to the middle hole bending and drawing device, 7a refers to the re-coating device, 8a refers to the reserved preheating device, 9a refers to the preheating device, 10a refers to the cover entering the turntable device, 14a refers to the cover exiting the turntable device, 15a and 16a refer to the cooling device, 19a refers to the middle hole curling device, the device after 19a is the same as the patent of the easy-tear cover production line applied by our company, 26 refers to the synchronous belt conveying mechanism, A refers to the drying device, and B refers to the driving device (synchronous belt tooth driving device, sprocket driving device or gear driving device).

[0028] Figure 8In the figure, the guide rod 33, the guide sleeve 32 is connected to the upper mounting frame 35, the guide rod 33 passes through the guide sleeve 32, and the lower end of the guide rod 33 is fixedly connected to the upper positioning plate 11 or connected to the positioning plate 11 through a bearing. A spring 34 is sleeved on the guide rod 33 between the upper positioning plate 11 and the guide sleeve 32, and the upper end of the guide rod 33 is connected to the lifting drive device 10 through an anti-collision block 31. A guide hole 38 or a countersunk hole is opened on one side of the anti-collision block 31. The anti-rotation pin 37 fixed on the guide sleeve 32 is located in the guide hole 38 and can move up and down in the guide hole 38 under the action of external force.

[0029] Figure 8 The circumferential surface of the middle repainting plate 14 is embedded with an elastic body 36, and the elastic body 38 prints the paint sprayed thereon on the cover ring cut surface through contact with the cover ring cut surface. The circumferential surface of the repainting plate 14 can be entirely made of an elastic body, that is, the annular elastic body is sleeved on the repainting plate body, and the repainting plate 14 can also be made of an elastic body material.

[0030] It should be understood that although the above embodiments have given a detailed textual description of the design ideas of the present invention, these textual descriptions are only simple textual descriptions of the design ideas of the present invention, rather than limitations on the design ideas of the present invention. Any combination, addition or modification that does not exceed the design ideas of the present invention shall fall within the protection scope of the present invention.

Claims

1. A tear-off cover production line with re-coating, comprising an easy-to-tear cover production line, characterized in that: A re-coating device (7a) is added between the middle hole bending and drawing device (6a) and the middle hole curling device (19a) of the easy-tear cover production line, and a drying device (A) is arranged behind the re-coating device 7a. A paint reflow disk (13) in the re-coating device (7a) has an axial hole in the middle and the paint reflow disk is fixed on a frame. A feed port (12) is arranged on the paint reflow disk (13). A discharge coating head (17) is located on the inner wall of the paint reflow disk. The discharge coating head (17) is a paint spray head structure or a paint spraying structure with a brush or a coating flexible coating structure. A soft scraper (16) is provided on one side of the discharge coating head (17); the back of the re-coating plate (14) is connected to a driving shaft in a driving device (15); an upper positioning plate (11) is located above the coating return plate (13) and the upper positioning plate (11) is driven to rise or fall by an upper lifting driving device (10); when the synchronous belt conveying mechanism sends the punched middle hole and the drawn cover ring to the re-coating station, the upper lifting driving device (10) drives the upper positioning plate (11) downward to position the cover ring to the inner hole of the upper positioning plate (11), and the re-coating plate (14) The lower lifting platform is driven upward to the middle hole of the cover ring to apply the paint on the cut surface of the middle hole of the cover ring, and then the coating plate (14) is driven downward and rotated by the driving device (15) to be coated with the paint flowing out of the feed port (12). After coating, it is evenly scraped by the soft scraper (16). The cover ring is heated and dried by the drying device A at the back, and then the curling device completes the curling after cooling; the guide rod (33) and the guide sleeve (32) are connected to the upper mounting frame (35), and the guide rod (33) passes through the guide sleeve (32). The guide rod (33) ) is fixedly connected to the upper positioning plate (11) or connected to the positioning plate (11) through a bearing, a spring (34) is sleeved on the guide rod (33) between the upper positioning plate (11) and the guide sleeve (32), and the upper end of the guide rod (33) is connected to the upper lifting drive device (10) through an anti-collision block (31), and a guide hole (38) or a countersunk hole is opened on one side of the anti-collision block (31), and an anti-rotation pin (37) fixed on the guide sleeve (32) is located in the guide hole (38) and can move up and down in the guide hole (38) under the action of an external force.

2. The production line of the easy-tear cover with re-coating according to claim 1 is characterized in that: The driving device (15) is connected to the lower lifting platform, and the driving device (15) is driven to rise or fall by the lower lifting platform.

3. The production line of easy-tear lid with re-coating according to claim 1 is characterized in that: The upper lifting drive device (10) is an electric lifting device or a pneumatic lifting device, or the upper lifting drive device (10) is synchronously driven by the lower lifting platform.

4. The production line of easy-tear lid with re-coating according to claim 1 is characterized in that: A plurality of grooves (3) for inserting cover rings are formed on the outer side of a turntable in a drying device, turntable gaskets (4) are installed in the grooves or on the sides of the grooves, a toothed structure (7) is formed on the outer side of the turntable, a drying oven (5) is covered on the turntable, and a first driving device (2) cooperates with the toothed structure (7) on the outer side of the turntable to drive the turntable to rotate.

5. The production line of easy-tear lid with re-coating according to claim 4 is characterized in that: The first driving device (2) is a gear mechanism, a sprocket mechanism or a synchronous belt pulley mechanism.

6. The production line of easy-tear lid with re-coating according to claim 1 is characterized in that: In the drying device (A), a chain (106) is sleeved on a lower transmission sprocket (102) and an upper transmission sprocket (101) to form a sprocket chain transmission mechanism, a plurality of cover ring clamping members (103) are fixed on the chain to form a cover ring conveying transmission mechanism, and a drying oven (105) with an inverted U-shaped cross section is covered on the cover ring conveying transmission mechanism.

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