A spray carrier plate reflow line and control method thereof

Abstract

The application discloses a spraying carrier plate reflow line and a control method thereof, realizes full-process automatic circulation use of the spraying carrier plate from an oven outlet to a spraying machine inlet, and through the cooperative work of a first lifting assembly, a conveying roller group, a second lifting assembly and a controller, can automatically complete receiving, height compensation, long-distance stable conveying, secondary height matching of the carrier plate and linkage plate feeding with the spraying machine, the whole reflow process does not need manual intervention, significantly reduces the labor intensity and manpower allocation demand of the operator, eliminates the wide channel and rotation space needed by manual carrying, makes the production line layout more compact and reasonable, is favorable to intensive use of the workshop site, the mechanical conveying also avoids possible carrier plate falling, collision or scratching in the manual carrying process, operation is safer and more reliable, and truly realizes intelligentization, unmanned and lean production of the spraying carrier plate reflow link.

Description

Technical Field

[0001] This invention belongs to the field of glass cover plate processing technology, and relates to an automated spraying equipment, specifically a spraying carrier plate return line and its control method. Background Technology

[0002] In the manufacturing process of mobile phone glass covers, a spray coating process is usually required to improve the anti-fingerprint, anti-reflective, and ink adhesion properties of the cover surface. During the spray coating process, the glass cover needs to be placed stably on a special spray coating carrier plate and fed into the spray coating machine to complete the coating application. Then, it enters a tunnel baking oven for drying and curing. Finally, the dried product is manually removed from the spray coating carrier plate.

[0003] Currently, most mobile phone glass cover manufacturers manually transport empty coating carrier plates in the above process. Specifically, after removing the dried product from the coating carrier plate at the oven outlet, the operator manually moves the empty carrier plate to the spraying machine inlet for reloading the glass cover plate to be coated. This traditional method has the following technical drawbacks: First, the manual transport of the coating substrate results in high labor costs. Each coating processing line usually requires multiple porters to work in shifts, resulting in significant labor expenses.

[0004] Secondly, the coating carrier plates are mostly made of aluminum or iron plates, which are quite heavy. Manual handling for a long time is physically demanding, slow, and inefficient. This can easily lead to the coating machine being idle while waiting for the coating carrier plate, which seriously affects the overall efficiency of the coating process and the utilization rate of the equipment.

[0005] Third, the standard size of the coating carrier plate is 1500mm×1500mm, which is relatively large. When handling it manually, it requires a wide walking passage and turning space, which occupies a large area of ​​the workshop. This is not conducive to the compact layout of the production line and the efficient use of workshop space. At the same time, there is a risk of the coating carrier plate falling or being bumped during manual handling, which may cause deformation or damage to the coating carrier plate, thereby affecting the positioning accuracy and coating quality of the glass cover plate during subsequent spraying. Summary of the Invention

[0006] To address the technical problems existing in the background art, this invention proposes a spraying carrier plate return line and its control method, which can automatically complete the return of the spraying carrier plate and link with the spraying equipment for control, realizing the fully automated cyclic use of the spraying carrier plate.

[0007] The objective of this invention can be achieved through the following technical solutions: A coating carrier return line is disclosed, wherein the coating carrier, after being loaded with products and completed in a coating machine, flows into a tunnel-type baking oven for drying. The return line includes: a first lifting assembly, a conveying roller assembly, and a second lifting assembly. The first lifting assembly is connected to the baking oven roller assembly located at the outlet end of the tunnel-type baking oven to receive the empty coating carrier after the dried products are removed. The starting end of the conveying roller assembly is connected to the first lifting assembly raised to the same height, and the ending end of the conveying roller assembly is connected to the second lifting assembly raised to the same height to convey the coating carrier on the first lifting assembly to the second lifting assembly. The second lifting assembly is connected to the coating machine roller assembly located at the inlet end of the coating machine to push the coating carrier onto the coating machine roller assembly to load products again and enter the coating machine for coating.

[0008] Furthermore, the first lifting assembly includes: a lifting frame, a lifting platform, and a lifting cylinder. A guide rail is provided on the lifting frame along the vertical direction. The lifting platform is slidably installed on the guide rail. The lifting cylinder drives the lifting platform to move up and down along the guide rail. A rotating roller is laid on the lifting platform to transfer the coating plate to the conveying roller group when the first lifting assembly docks with the conveying roller group.

[0009] Furthermore, a pusher mechanism is provided on one side of the lifting platform. The pusher mechanism includes a pusher cylinder and a pusher claw fixed to the output end of the pusher cylinder, so as to push the coating carrier plate laterally from the baking oven roller group to the lifting platform.

[0010] Furthermore, the second lifting assembly has the same structure as the first lifting assembly, but the push plate mechanism of the second lifting assembly is opposite in direction to the push plate mechanism of the first lifting assembly, so as to push the spraying carrier plate from the lifting platform onto the spraying machine roller assembly.

[0011] Furthermore, the conveyor roller assembly is configured as a powered roller conveyor line, comprising multiple carbon steel rollers, chains, and geared motors.

[0012] Furthermore, the return line also includes a controller, which is connected to the first lifting assembly, the conveying roller group, the second lifting assembly, and multiple photoelectric sensors to control the coating carrier plate to flow back from the oven roller group at the outlet end of the tunnel oven through the first lifting assembly, the conveying roller group, and the second lifting assembly to the coating machine roller group at the inlet end of the coating machine.

[0013] Furthermore, the multiple photoelectric sensors are configured sequentially as follows: The first positioning sensor is installed on the first lifting assembly and is used to detect whether the coating carrier plate has completely entered the first lifting assembly from the baking oven roller group; The second positioning sensor, installed on the second lifting assembly, is used to detect whether the coating carrier plate has completely entered the second lifting assembly from the conveyor roller group.

[0014] Furthermore, the controller is equipped with a signal interface that is linked with the spraying machine to receive the request for a carrier plate signal from the spraying machine. The controller only controls the second lifting component to push the spraying carrier plate onto the roller group of the spraying machine after receiving the request for a carrier plate signal.

[0015] Furthermore, the method for controlling the return line of the sprayed carrier plate includes: The first lifting mechanism is controlled to receive the empty spraying carrier plate from the baking oven roller group and to detect that the spraying carrier plate is in place. The first lifting platform mechanism is controlled to transfer the spraying carrier plate onto the conveyor roller assembly; The control conveyor roller group transports the spraying carrier plate to the second lifting assembly and detects that the spraying carrier plate is in place; In response to the request signal from the spraying machine, the second lifting platform mechanism is controlled to transfer the spraying carrier plate onto the spraying machine roller assembly; Repeat the above steps.

[0016] Furthermore, the operating speed of the conveyor roller assembly is dynamically adjusted according to the spraying cycle of the spraying machine. When the spraying cycle speeds up, the conveying speed of the conveyor roller assembly is increased, and vice versa, so as to achieve speed matching with the spraying machine.

[0017] The beneficial effects of this invention are as follows: The spraying carrier plate return line and its control method provided by this invention realize the fully automated recycling of the spraying carrier plate from the oven outlet to the spraying machine inlet, completely replacing the traditional manual handling method. Through the coordinated work of the first lifting component, the conveying roller group, the second lifting component and the controller, the receiving, height compensation, long-distance stable transmission, secondary height matching and linkage with the spraying machine of the carrier plate can be automatically completed. The entire return process does not require manual intervention, which significantly reduces the labor intensity of operators and the manpower configuration requirements. The fixed-path roller conveyor method replaces the wide channel and turning space required for manual handling, making the production line layout more compact and reasonable, which is conducive to the intensive use of workshop space. The mechanized conveying also avoids the carrier plate falling, collision or scratch that may occur during manual handling, which not only protects the flatness of the carrier plate itself, but also reduces the risk of positioning deviation or scratches caused by carrier plate deformation in downstream glass cover products. The operation is safer and more reliable, and truly realizes the intelligent, unmanned and lean production of the spraying carrier plate return process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a spray coating carrier return line, wherein the spray coating carrier is a sheet material used to load products during spray coating operations, and is mostly made of aluminum, iron, etc. After the products loaded on the spray coating carrier are sprayed in the spray coating machine 1, they flow into the tunnel baking oven 2 for drying. After the dried products are removed from the spray coating carrier, the empty spray coating carrier can be returned to the spray coating machine 1 using the return line provided by this invention to load the next product for spray coating operations.

[0021] like Figure 1 As shown, the return line includes: a first lifting assembly 3, a conveyor roller group 4, a second lifting assembly 5, and a controller. The first lifting assembly 3 is connected to the oven roller group 6 located at the outlet end of the tunnel oven 2 to receive the empty spraying carrier plate after the dried product is removed. The starting end of the conveyor roller group 4 is connected to the first lifting assembly 3 raised to the same height, and the end of the conveyor roller group 4 is connected to the second lifting assembly 5 raised to the same height to convey the spraying carrier plate on the first lifting assembly 3 to the second lifting assembly 5. The second lifting assembly 5 is connected to the spraying machine roller group 7 located at the inlet end of the spraying machine 1 to push the spraying carrier plate onto the spraying machine roller group 7 to reload the product into the spraying machine 1 for spraying processing.

[0022] The controller is connected to the first lifting assembly 3, the conveying roller group 4, the second lifting assembly 5, and multiple photoelectric sensors to control the spraying carrier plate to flow from the baking oven roller group 6 at the outlet end of the tunnel baking oven 2 through the first lifting assembly 3, the conveying roller group 4, and the second lifting assembly 5 back to the spraying machine roller group 7 at the inlet end of the spraying machine 1, so as to realize unmanned automatic circulation.

[0023] Among them, the first lifting component 3 and the second lifting component 4 can compensate for the height difference between the spraying machine 1 and the tunnel baking oven 2 and the return line through the lifting action, so as to avoid the spraying carrier plate from being hit or falling.

[0024] The first lifting assembly 3 includes a lifting frame, a lifting platform, and a lifting cylinder. A guide rail is vertically mounted on the lifting frame, and the lifting platform is slidably mounted on the guide rail. The lifting cylinder drives the lifting platform, causing it to move up and down along the guide rail. The cylinder stroke controls the precise stopping at different heights, achieving seamless connection. Rotating rollers are laid on the lifting platform to transfer the coating carrier plate onto the conveyor roller group 4 when the first lifting assembly 3 connects with the conveyor roller group 4. A pusher mechanism is provided on one side of the lifting platform. The pusher mechanism includes a pusher cylinder and a pusher claw fixed to the output end of the pusher cylinder to push the coating carrier plate laterally from the baking oven roller group 6 onto the lifting platform, ensuring the coating carrier plate is fully inserted into the lifting platform.

[0025] The second lifting assembly 5 has the same structure as the first lifting assembly 3. The push plate mechanism of the second lifting assembly 5 is opposite in direction to the push plate mechanism of the first lifting assembly 3, so as to push the spraying carrier plate from the lifting platform to the spraying machine roller group 7.

[0026] The conveyor roller group 4 is configured as a powered roller conveyor line to achieve stable long-distance transmission. The conveyor roller group 4 includes multiple carbon steel rollers, a chain, and a geared motor. The roller spacing and diameter are designed according to the size of the carrier plate to ensure that at least 3-4 rollers provide support and prevent the coating carrier plate from sinking. The geared motor, in conjunction with a frequency converter, achieves stepless speed regulation and can dynamically adjust the conveying speed according to the cycle time of the spraying machine 1 to avoid accumulation or waiting.

[0027] Multiple photoelectric sensors are used as safety interlock signals, and are configured sequentially as follows: The first positioning sensor is installed on the first lifting assembly 3 to detect whether the spraying carrier plate has completely entered the first lifting assembly 3 from the baking oven roller group 6, ensuring that the spraying carrier plate is completely placed on the lifting platform before the lifting operation is carried out to prevent it from falling. The second positioning sensor is installed on the second lifting assembly 5 to detect whether the coating carrier has completely entered the second lifting assembly 5 from the conveying roller group 4. It ensures that the coating carrier has completely reached the second lifting platform before stopping the conveying roller group 4 and starting the lifting action to avoid the coating carrier being partially suspended in the air.

[0028] The controller is also equipped with a signal interface linked to the spraying machine 1 to receive a request for a carrier plate from the spraying machine 1. This signal indicates that the spraying machine has completed the spraying of the current product and the internal roller conveyor is now empty. Furthermore, the controller only controls the second lifting assembly 5 to push the spraying carrier plate onto the spraying machine roller group 7 after receiving the request for a carrier plate signal, preventing blind feeding that could cause blockages or collisions, achieving precise timing matching between the preceding and following processes, and avoiding waiting for the spraying machine 1 or accumulation of spraying carrier plates.

[0029] Based on the above embodiments, the present invention also provides a method for controlling the return line of a spraying carrier plate, comprising: Step S1: The controller controls the push plate mechanism of the first lifting assembly 3 to push the coating carrier plate from the baking oven roller group 6 at the outlet end of the tunnel baking oven 2 to the lifting platform of the first lifting mechanism 3, and detects whether the coating carrier plate has completely entered the first lifting mechanism 3 through the first positioning sensor.

[0030] In step S2, when the coating carrier plate is fully inserted into the first lifting mechanism 3, the controller controls the first lifting assembly 3 to lift or lower to a position flush with the conveying roller group 4, and the coating carrier plate is conveyed to the conveying roller group 4 through the rotating rollers laid on the lifting platform.

[0031] In step S3, the controller starts the conveyor roller group 4 to convey the coating carrier plate to the second lifting assembly 5, and detects whether the coating carrier plate has completely entered the second lifting assembly 5 through the second positioning sensor.

[0032] In step S4, when the coating carrier plate is fully inserted into the second lifting assembly 5, the controller stops the conveying roller group 4 and controls the second lifting assembly 5 to descend or rise to a position flush with the coating roller group 7 at the inlet end of the coating machine 1.

[0033] Step S5: When the controller receives the request for a carrier plate signal from the sprayer 1, it controls the pusher mechanism of the second lifting assembly 5 to push the spraying carrier plate from the second lifting assembly 5 onto the sprayer roller group 7 at the inlet end of the sprayer 1.

[0034] In step S6, the product to be sprayed is loaded onto the spraying carrier plate and fed into the spraying machine 1 through the spraying machine roller group 7 to complete the spraying process. The spraying carrier plate enters the tunnel baking oven 2 for drying. After the dried product is taken out from the baking oven roller group 6, the empty spraying carrier plate enters the first lifting component 3 again to form a cycle, thereby completing the return closed loop and realizing the infinite recycling of the spraying carrier plate without manual intervention.

[0035] The operating speed of the conveyor roller group 4 is dynamically adjusted according to the spraying cycle of the spraying machine 1. When the spraying cycle speed is increased, the conveying speed of the conveyor roller group 4 is increased, and vice versa, so as to achieve speed matching with the spraying machine 1, eliminate the speed difference between the return line and the spraying machine 1, reduce mechanical impact, and extend the service life of the equipment.

[0036] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A spray coating carrier return line, wherein the spray coating carrier, after the product is sprayed in a spray coating machine (1), flows into a tunnel baking oven (2) for drying, characterized in that, The return line includes: a first lifting assembly (3), a conveying roller group (4), and a second lifting assembly (5). The first lifting assembly (3) is connected to the oven roller group (6) located at the outlet end of the tunnel oven (2) to receive the empty spraying carrier plate after the dried product is taken out. The starting end of the conveying roller group (4) is connected to the first lifting assembly (3) which is raised to the same height. The end of the conveying roller group (4) is connected to the second lifting assembly (5) which is raised to the same height to transport the spraying carrier plate on the first lifting assembly (3) to the second lifting assembly (5). The second lifting assembly (5) is connected to the spraying machine roller group (7) located at the inlet end of the spraying machine (1) to push the spraying carrier plate onto the spraying machine roller group (7) to reload the product into the spraying machine (1) for spraying processing.

2. The spray coating carrier return line according to claim 1, characterized in that, The first lifting assembly (3) includes: a lifting frame, a lifting platform, and a lifting cylinder. A guide rail is provided on the lifting frame along the vertical direction. The lifting platform is slidably installed on the guide rail. The lifting cylinder drives the lifting platform to move up and down along the guide rail. A rotating roller is laid on the lifting platform to transfer the coating plate to the conveying roller group (4) when the first lifting assembly (3) docks with the conveying roller group (4).

3. The spray coating carrier return line according to claim 2, characterized in that, A push plate mechanism is provided on one side of the lifting platform. The push plate mechanism includes a push plate cylinder and a push claw fixed at the output end of the push plate cylinder, so as to push the coating carrier plate laterally from the baking oven roller group (6) to the lifting platform.

4. The spray coating carrier return line according to claim 3, characterized in that, The second lifting assembly (5) has the same structure as the first lifting assembly (3). The push plate mechanism of the second lifting assembly (5) is opposite in direction to the push plate mechanism of the first lifting assembly (3) so as to push the spraying carrier plate from the lifting platform to the spraying machine roller group (7).

5. The spray coating carrier return line according to claim 4, characterized in that, The conveyor roller group (4) is configured as a powered roller conveyor line, including multiple carbon steel rollers, chains and geared motors.

6. The spray coating carrier return line according to claim 1, characterized in that, Also includes: The controller is connected to the first lifting assembly (3), the conveying roller group (4), the second lifting assembly (5) and multiple photoelectric sensors respectively, so as to control the spraying carrier plate to flow back from the baking oven roller group (6) at the outlet end of the tunnel baking oven (2) through the first lifting assembly (3), the conveying roller group (4), the second lifting assembly (5) to the spraying machine roller group (7) at the inlet end of the spraying machine (1).

7. The spray coating carrier return line according to claim 6, characterized in that, Multiple photoelectric sensors are configured sequentially as follows: The first positioning sensor is installed on the first lifting assembly (3) to detect whether the spraying carrier plate has completely entered the first lifting assembly (3) from the baking oven roller group (6). The second positioning sensor is installed on the second lifting assembly (5) to detect whether the spraying carrier plate has completely entered the second lifting assembly (5) from the conveying roller group (4).

8. The spray coating carrier return line according to claim 7, characterized in that, The controller is equipped with a signal interface that is linked with the sprayer (1) to receive the request for a carrier plate signal sent by the sprayer (1), and the controller only controls the second lifting component (5) to push the spraying carrier plate onto the sprayer roller group (7) after receiving the request for a carrier plate signal.

9. A method for controlling the return line of a sprayed carrier plate as described in any one of claims 1-8, characterized in that, include: Control the first lifting mechanism (3) to receive the empty spraying carrier plate from the baking oven roller group (6) and detect that the spraying carrier plate is in place; Control the first lifting platform mechanism (3) to transfer the spraying carrier plate onto the conveying roller group (4); The control conveyor roller group (4) conveys the spraying carrier plate to the second lifting assembly (5) and detects that the spraying carrier plate is in place; In response to the request signal from the spraying machine (1), the second lifting platform mechanism (5) is controlled to transfer the spraying carrier plate onto the spraying machine roller group (7); Repeat the above steps.

10. The control method according to claim 9, characterized in that, The running speed of the conveyor roller group (4) is dynamically adjusted according to the spraying cycle of the spraying machine (1). When the spraying cycle speed is increased, the conveying speed of the conveyor roller group (4) is increased, and vice versa, so as to achieve speed matching with the spraying machine (1).

Images