A method for improving the corrosion resistance of a die-cast part of a vehicle-mounted backlight module

Abstract

This invention discloses a method for improving the corrosion resistance of die-cast parts for automotive backlight modules, comprising the following steps: S1: The die-cast part is removed from the die-casting machine using a transfer device; S2: A transport module transports the transfer device carrying the die-cast part to a surface treatment module; S3: The surface treatment module treats the parting line of the die-cast part on the transfer device and performs corrosion-resistant treatment on the die-cast part; S4: The transport module sends the transfer device carrying the surface-treated die-cast part to the finished product area for recycling. This invention employs an adjustment module to accommodate die-cast parts of different models and sizes. The surface treatment module enables one-time processing of parting line treatment and coating treatment. The clamping module clamps the edge of the die-cast part, preventing the edge from bending during parting line treatment. Furthermore, the clamping module allows for clamping of the die-cast part with a very small clamping area, reducing dead zones during chemical treatment.

Description

Technical Field

[0001] This invention relates to the field of surface treatment technology for die-cast parts, and more specifically, to a method for improving the corrosion resistance of die-cast parts for automotive backlight modules. Background Technology

[0002] The backlight frame and other components are manufactured using die casting. Before delivery, die castings typically require surface cleaning. This cleaning removes oxide scale, parting lines, and other imperfections. Common surface treatments include manual brushing, grinding, immersion in a solution to remove oil, shot blasting, sandblasting, polishing, and washing. After surface treatment, die castings can be further treated with painting, powder coating, baking varnish, oxidation, electroplating, electrophoresis, or chemical plating to enhance their corrosion resistance. While painting effectively isolates the die casting from external corrosion, it requires manual application and cannot coat the entire casting in one go. The die casting must be repositioned to repaint uncoated areas. This results in inconsistent coating uniformity and thickness, potentially leading to paint cracking over time.

[0003] To address this, existing technologies typically employ electroplating, electromagnetic graphene deposition, and hot-dip plating to form a dense oxide or plating layer on the surface of the die-cast part through chemical reactions. This achieves comprehensive coverage of the die-cast part while ensuring consistent coating. However, this method also has its problems. Electroplating and similar processes require some structures (such as electrical wires) to contact the die-cast part, creating plating dead zones during the reaction. For example, patents with patent numbers 202123344321.8, 202121996757.2, 202322519269.8, and 202110375354.4 mention plating dead zones caused by contact with lifting devices, and provide solutions to these dead zones. It is clear that for small parts... The backlight can be suspended using a hoist. However, the die-cast parts of the backlight are usually rectangular with borders on all four sides. Compared to the small parts in the aforementioned patent, they are much larger in size and weight. If a bottom mounting plate is used for hoisting, dead corners will still form in the area in contact with the mounting plate. This is especially true when electromagnetically depositing graphene. Although the coating is very thin, uneven thickness will still occur. Therefore, the technical problem to be solved by this invention is how to complete both physical treatment (parting line and surface polishing) and chemical treatment (surface electroplating or electrodeposition) in one go when surface treating the die-cast parts, while avoiding damage to the borders of the die-cast parts during physical treatment and reducing the dead corner area during chemical treatment. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a method for improving the corrosion resistance of die-cast parts for automotive backlight modules, comprising the following steps:

[0006] S1: The die-casting part is removed from the die-casting machine using a transfer device;

[0007] S2: The transport module delivers the transfer equipment carrying the die-cast parts to the surface treatment module;

[0008] S3: The surface treatment module processes the parting line of the die-castings on the transfer equipment and performs corrosion-resistant treatment on the die-castings;

[0009] S4: The transport module delivers the transfer equipment carrying the surface-treated die-cast parts to the finished product area for recycling.

[0010] Preferably, the surface treatment module is used to treat the parting line on the outer surface of the frame of the die casting and to perform anti-corrosion treatment on the die casting.

[0011] The transfer device includes: an adjustment module and two clamping modules disposed on the adjustment module.

[0012] The adjustment module is used to adjust the distance between the two clamping modules and to support the two opposite edges of the die-cast part during surface treatment.

[0013] The clamping module is used to remove the die-cast part from the die-casting machine and to fix the frame of the die-cast part during surface treatment.

[0014] The transport module and the adjustment module are mounted on the transport module. The transport module is used to drive the adjustment module to move, thereby moving the die-casting part from the die-casting machine to the surface treatment module.

[0015] Preferably, the surface treatment module consists of a parting line treatment section and a coating treatment section. The die-cast part is clamped by the clamping module and transported to the parting line treatment section to process the parting line on the edge of the die-cast part, and then transported to the coating treatment section to perform surface coating treatment on the die-cast part.

[0016] Preferably, the die-cast part is electroplated or electromagnetically deposited with graphene in the coating treatment section.

[0017] Preferably, the adjustment module consists of a hollow main arm and a secondary arm disposed inside the main arm. One end of the main arm is provided with a clamping module, and the other end is movably connected to one end of the secondary arm. The other end of the secondary arm is provided with another clamping module. The main arm is provided with an adjustment component and a fixing component. The adjustment component passes through the main arm and is movably connected to the secondary arm. The fixing component passes through the main arm and is movably connected to the secondary arm.

[0018] Preferably, the auxiliary arm is provided with a rack along the axial direction, and the adjustment assembly consists of a cover provided on the outer wall of the main arm and a gear movably connected to the cover via an adjustment shaft. The two ends of the adjustment shaft pass through the cover and are rotatably connected to the cover. The main arm is provided with a first hole, and the teeth of the gear mesh with the rack of the auxiliary arm through the first hole.

[0019] Preferably, the main arm is provided with a second hole, which is a threaded hole. The fixing component is disposed in the second hole, and the fixing component is a post with external threads. The fixing component is threadedly connected to the second hole, and the fixing component passes through the main arm and selectively abuts against the auxiliary arm.

[0020] Preferably, the clamping module consists of two symmetrically arranged clamping surfaces, namely a first surface and a second surface, which are connected by a first connecting part, and the clamping module is n-shaped.

[0021] Preferably, the clamping surface is provided with a second connecting part connected to the adjustment module, a first clamping part connected to the frame of the die-casting part, and two second clamping parts connected to the side walls of the frame of the die-casting part. A guide part is provided at the bottom of the clamping surface. The guide part of the first surface extends away from the second surface, and the guide part of the second surface extends away from the first surface. The second clamping part is disposed on the guide part. The first clamping part and the second clamping part of the first surface both extend towards the second surface, and the first clamping part and the second clamping part of the second surface both extend towards the first surface. The distance d between the end of the first clamping part and the first connecting part is less than the distance D between the top of the second clamping part and the first connecting part. The distance r between the ends of the two opposing second clamping parts of the first surface and the second surface is less than the distance R between the ends of the two opposing first clamping parts of the first surface and the second surface. The contact area between the end of the second clamping part and the frame of the die-casting part is less than the contact area between the end of the first clamping part and the frame of the die-casting part.

[0022] Preferably, the clamping surface is provided with an opening groove, the opening of which is located at the connection between the clamping surface and the first connecting part. The two ends of the second connecting part are connected to the two side walls opposite to the opening groove. The first clamping part is disposed on the side wall opposite to the opening of the opening groove. The width Q of the opening groove is greater than the width q of the first clamping part. The clamping module also includes an auxiliary pad block. The auxiliary pad block is n-shaped. The outer wall of the auxiliary pad block is provided with an abutment groove that abuts against the end of the first clamping part. The two sides of the abutment groove are provided with protruding ridges. The ridges abut or engage with the second connecting part. When the end of the first clamping part abuts against the side wall of the abutment groove, the ridge is located in the gap between the first clamping part and the side wall of the opening groove. The width t of the auxiliary pad block is less than the distance T between the two second clamping parts located on the same surface.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] This invention employs an adjustment module to accommodate die-cast parts of different models and sizes. The surface treatment module enables one-time processing of parting line treatment (physical surface treatment) and coating treatment (chemical anti-corrosion treatment) without the need to change other transfer equipment. The clamping module clamps the edge of the die-cast part, preventing the edge from being bent when processing the parting line. At the same time, the clamping module can clamp the die-cast part with a very small clamping area, reducing the dead area area during chemical treatment.

[0025] The method for improving the corrosion resistance of die-cast parts for automotive backlight modules described in this invention, other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the transfer device of the present invention.

[0028] Figure 2 for Figure 1 Exploded view of the main arm and auxiliary arm at point A.

[0029] Figure 3 for Figure 1 Exploded view of the adjustment component at point B.

[0030] Figure 4 for Figure 1 Exploded view of the fixed component at point C.

[0031] Figure 5 This is a schematic diagram of the clamping module in this invention.

[0032] Figure 6 This is a left view of the clamping module in this invention.

[0033] Figure 7 This is the front view of the clamping module in this invention.

[0034] Figure 8 This is a schematic diagram of the auxiliary pad block in this invention.

[0035] Figure 9 This is a schematic diagram (D) of the installation of the auxiliary pad and clamping module in this invention, and a schematic diagram (E) of the connection with the frame of the die-cast part.

[0036] In the figure: 1 Adjustment module, 2 Clamping module, 21 Clamping surface, 21a First surface, 21b Second surface, 22 First connecting part, 23 Second connecting part, 24 First clamping part, 25 Second clamping part, 26 Guide part, 27 Opening slot, 3 Frame of die casting, 4 Main arm, 41 Second hole, 5 Secondary arm, 51 Rack, 6 Adjustment component, 61 Cover, 62 Adjustment shaft, 63 Gear, 7 Fixing component, 8 Auxiliary pad, 81 Abutment groove, 82 Ridge. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0038] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0039] like Figures 1-9 As shown, the present invention provides a method for improving the corrosion resistance of die-cast parts for automotive backlight modules, the steps of which are as follows:

[0040] S1: The die-casting part is removed from the die-casting machine using a transfer device;

[0041] The transfer device includes: an adjustment module 1 and two clamping modules 2 disposed on the adjustment module 1.

[0042] The adjustment module 1 is used to adjust the distance between the two clamping modules 2 and to support the two opposite edges of the die-cast part during surface treatment.

[0043] The clamping module 2 is used to remove the die-casting part from the die-casting machine and to fix the frame 3 of the die-casting part during surface treatment.

[0044] The adjustment module 1 is mounted on the transport module, and the transport module is used to move the adjustment module 1, thereby moving the die-cast part from the die-casting machine to the surface treatment module.

[0045] Step S1 includes:

[0046] S101: Adjust the adjustment module 1 according to the model of the die casting and the size between the two opposite sides, so that the two clamping modules 2 can clamp on the two opposite sides of the die casting. Since the die casting is usually rectangular and has four sides, the transfer device can be set to two, which are clamped on the two opposite sides of the die casting respectively.

[0047] S102: After the upper mold and lower mold of the die casting machine are separated, the transport module drives the adjustment module 1 to move into the die casting machine, and drives the clamping module 2 on the adjustment module 1 to move towards the edge 3 of the die casting, until the clamping module 2 is connected to the edge 3 of the die casting. At this time, the clamping module 2 does not intersect with the parting line of the die casting.

[0048] S2: The transport module delivers the transfer equipment carrying the die-cast parts to the surface treatment module;

[0049] The surface treatment module consists of a parting line treatment section and a coating treatment section. The parting line treatment section is used to treat the parting lines on the inner and outer surfaces of the frame 3 of the die casting, and the coating treatment section is used to perform anti-corrosion treatment on the die casting.

[0050] Step S2 includes:

[0051] S201: The transport module drives the adjustment module 1 to move from the die-casting machine to the parting line processing section of the surface treatment module;

[0052] S201: The transport module drives the adjustment module 1 to move, so that the clamping module 2 carries the die-casting part into the parting processing section;

[0053] S3: The surface treatment module processes the parting line of the die-castings on the transfer equipment and performs corrosion-resistant treatment on the die-castings;

[0054] Step S3 includes:

[0055] S301: The parting line processing unit processes the parting line of the die casting. When processing the parting line, the clamping module 2 can cooperate with the bottom surface of the die casting to fix the edge 3 of the die casting, so as to prevent the edge 3 of the die casting from being bent due to lack of support when processing the parting line.

[0056] S302: After the parting line processing is completed, the die-casting part enters the coating treatment section for anti-corrosion treatment under the drive of the transport module. In this invention, because the contact area between the clamping module 2 and the edge 3 of the die-casting part is small, chemical treatments such as electroplating or electromagnetic deposition of graphene (commonly used) can be used to coat and protect the die-casting part from corrosion. In addition to chemical treatment, physical treatments such as spraying paint (less commonly used) are also applicable. If physical spraying is used, after the first sprayed paint dries, the connection position between the clamping module 2 and the edge 3 of the die-casting part needs to be adjusted, and the unpainted areas are sprayed. Because the contact area between the clamping module 2 and the edge 3 of the die-casting part is small, a very small area to be sprayed will be left after the first spraying. It is not necessary to repeatedly move and spray as in the prior art, which can effectively reduce the uneven surface thickness caused by the mutual coverage of coatings.

[0057] S4: The transport module delivers the transfer equipment carrying the surface-treated die-cast parts to the finished product area for recycling.

[0058] The working principle and beneficial effects of the above technical solution are as follows: The present invention uses adjustment module 1 to adapt to die castings of different models and sizes. The surface treatment module can realize parting line treatment (physical surface treatment) and coating treatment (chemical anti-corrosion treatment) in one go without changing other transfer equipment. The clamping module 2 clamps the edge 3 of the die casting, which can prevent the edge 3 of the die casting from being bent when processing the parting line. At the same time, the clamping module 2 can clamp the die casting with a very small clamping area, reducing the dead area area during chemical treatment.

[0059] In this embodiment, we provide a specific structure of the adjustment module 1. The adjustment module 1 consists of a hollow main arm 4 and a secondary arm 5 disposed inside the main arm 4. One end of the main arm 4 is provided with a clamping module 2, and the other end is movably connected to one end of the secondary arm 5. The other end of the secondary arm 5 is provided with another clamping module 2. The secondary arm 5 can be inserted into the hollow main arm 4, and the two can move relative to each other, thereby adjusting the position of the secondary arm 5 on the main arm 4, and further adjusting the positional relationship between the two clamping modules 2 on the main arm 4 and the secondary arm 5. The adjustment module 1 can be connected to the transport module through the main arm 4. It should be noted that the die-casting machine, the transport module, and the surface treatment module are all commercially available products or existing technologies that can achieve their main functions. An adjustment component 6 is provided on the main arm 4, and the adjustment component 6 passes through the main arm 4 and is movably connected to the secondary arm 5. A rack 51 is provided along the axial direction of the secondary arm 5. The rack 51 can be embedded in the secondary arm 5 or disposed on the surface of the secondary arm 5, such as... Figure 2 As shown, if the rack 51 is chosen to be placed on the surface of the auxiliary arm 5, then the corresponding position of the hollow part of the main arm 4 used to insert the auxiliary arm 5 should be provided with a hole to accommodate the rack, such as... Figure 2 As shown.

[0060] In this embodiment, the adjustment assembly 6 consists of a cover 61 disposed on the outer wall of the main arm 4 and a gear 63 movably connected to the cover 61 via an adjustment shaft 62. The cover 61 is typically manufactured integrally with the main arm 4 to prevent it from detaching from the main arm 4 during long-term use. Both ends of the adjustment shaft 62 pass through the cover 61 and are rotatably connected to it. The gear 63 is disposed inside the cover 61 and is fixedly connected to the adjustment shaft 62 (this can be a key connection, or any connection method that allows the adjustment shaft 62 to drive the gear 63 to rotate, or any existing technology). Figure 3 As shown, the main arm 4 is provided with a first hole, and the teeth of the gear 63 mesh with the rack 51 of the auxiliary arm 5 through the first hole. In order to avoid problems such as misoperation, the end of the adjusting shaft 62 is usually provided with a groove for a special tool to adjust it. At the same time, there should be a certain resistance between the adjusting shaft 62 and the cover 61, so that the adjusting shaft 62 only needs sufficient torque to rotate relative to the cover 61 when using a special tool, thereby fixing the auxiliary arm 5 and preventing the adjusting shaft 62 from rotating due to vibration during long-term use.

[0061] A fixing component 7 is provided on the main arm 4, which passes through the main arm 4 and is movably connected to the auxiliary arm 5. A second hole 41 is provided on the main arm 4; the second hole 41 is a threaded hole. The fixing component 7 is disposed within the second hole 41. The fixing component 7 is a post with external threads, threadedly connected to the second hole 41. The fixing component 7 passes through the main arm 4 and selectively abuts against the auxiliary arm 5. To increase the force-bearing capacity of the fixing component 7, the threaded hole 41 can be designed to protrude from the main arm 4, thereby increasing the contact area between the fixing component 7 and the threaded hole 41, making its fixation effect on the auxiliary arm 5 more secure. In this embodiment, because the fixing component 7 is provided to fix the position of the auxiliary arm 5, we provide another implementation for the adjusting component 6. That is, the adjusting shaft 62 can enter from one side of the cover 61, but does not penetrate the cover 61. The end of the adjusting shaft 62 can be radially limited by keys, pins, teeth, etc., but not axially limited. When it is necessary to adjust the position of the auxiliary arm 5, it is only necessary to insert the adjusting shaft 62 into the cover 61 through a special tool and connect it with the gear 63. By rotating the adjusting shaft 62, the gear 63 is driven to rotate, and then the gear... The engagement of the gear 63 with the rack 51 drives the auxiliary arm 5 to move, thereby adjusting the position of the auxiliary arm 5. After adjustment, the auxiliary arm 5 is fixed in position by the fixing component 7. Then, the adjusting shaft 62 is removed from the cover 61, leaving the gear 63 inside the cover 61. The hole on the cover 61 for the adjusting shaft 62 to enter is then sealed with a silicone plug. In this embodiment, because the fixing component 7 is provided, there are no requirements for the engagement between the adjusting shaft 62 and the cover 61. Unlike the aforementioned embodiments, there is no need for a certain force between them to prevent the auxiliary arm 5 from moving. In this embodiment, the adjusting shaft 62 is a detachable component and can be removed from the cover 61 when not needed. Because of this, the adjusting shaft 62 does not have to be a shaft; it can also be a T-shaped wrench, as long as its end can be inserted into the cover 61 and drive the gear 63 to rotate.

[0062] In this embodiment, we provide a specific structure for the clamping module 2, which provides sufficient clamping area to support the edge 3 of the die-cast part during surface treatment at the parting line processing section, preventing the edge 3 from being bent and deformed during surface treatment, thus avoiding flatness issues. Simultaneously, it clamps the edge 3 of the die-cast part with minimal contact area during anti-corrosion treatment at the coating processing section, reducing dead-angle areas. The clamping module 2 consists of two symmetrically arranged clamping surfaces 21, namely a first surface 21a and a second surface 21b, connected by a first connecting part 22. The clamping module 2 is n-shaped, as shown below. Figure 5 , 6As shown. The clamping surface 21 is provided with a second connecting portion 23 connected to the adjustment module 1, a first clamping portion 24 connected to the frame 3 of the die-casting part, and two second clamping portions 25 connected to the side walls of the frame 3 of the die-casting part. The second connecting portions 25 typically protrude from the clamping surface 21 and are mainly used to connect the clamping module 2 to the adjustment module 1. Therefore, the second connecting portions 25 only need to be able to connect to the adjustment module 1. A guide portion 26 is provided at the bottom of the clamping surface 21. The guide portion 26 of the first surface 21a extends away from the second surface 21b, and the guide portion 26 of the second surface 21b extends away from the first surface 21a, such as... Figure 5 , 6 As shown, the guide portion 26 extends outward from the clamping surface 21. When the clamping module 2 is connected to the edge 3 of the die-casting part from top to bottom, the open guide portion 26 can more easily align and connect with the end of the edge 3 of the die-casting part. The second clamping portion 25 is disposed on the guide portion 26. Both the first clamping portion 24 and the second clamping portion 25 on the first surface 21a extend towards the second surface 21b, and both the first clamping portion 24 and the second clamping portion 25 on the second surface 21b extend towards the first surface 21a, as shown. Figure 6 As shown, this allows the first clamping portion 24 and the second clamping portion 25 to clamp the frame 3 of the die-cast part. The distance d between the end of the first clamping portion 24 and the first connecting portion 22 is less than the distance D between the top of the second clamping portion 25 and the first connecting portion 22, as shown. Figure 6 As shown, it can be seen that the clamping position of the first clamping part 24 on the edge 3 of the die-casting part is higher than the clamping position of the second clamping part 25 on the edge 3 of the die-casting part. The distance r between the ends of the two second clamping parts 25 facing the first surface 21a and the second surface 21b is less than the distance R between the ends of the two first clamping parts 24 facing the first surface 21a and the second surface 21b, as shown. Figure 6As shown, because the distance between the relatively closer second clamping parts 25 is, the clamping force of the second clamping parts 25 on the edge 3 of the die-casting part is greater. The contact area between the end of the second clamping part 25 and the edge 3 of the die-casting part is smaller than the contact area between the end of the first clamping part 24 and the edge 3 of the die-casting part. Usually, the second clamping parts 25 adopt point contact. Because its contact area is small, two second clamping parts 25 need to be provided on each clamping surface 21. In this way, a total of four second clamping parts 25 form four-point clamping to ensure the firmness of the second clamping parts 25 when clamping. The first clamping part 24 usually adopts line contact or surface contact to enhance the clamping force of the clamping module 2 on the edge 3 of the die-casting part. Through the above structural design, when the clamping module 2 is connected to the frame 3 of the die-casting part, the frame 3 of the die-casting part is first inserted into the n-shaped clamping module 2 under the action of the guide part 26. Then, the second clamping part 25 with a smaller contact area is first opened by the frame 3 of the die-casting part to make point contact. Then, as the frame 3 of the die-casting part is continuously inserted, the first clamping part 24 is opened to make large-area contact with the frame 3 of the die-casting part. The two clamping parts increase the firmness of the connection of the frame 3 of the die-casting part, thereby avoiding the frame 3 of the die-casting part from being bent when the parting line processing part performs surface treatment on the frame 3 of the die-casting part, which would affect the flatness. When the die-cast part is delivered to the coating treatment section, the clamping module 2 can move upward a certain distance relative to the die-cast part. At this time, a device or existing technology for pushing the edge 3 of the die-cast part downward can be provided on the adjustment module 1. The device or existing technology for pushing the edge 3 of the die-cast part downward can be connected to the clamping module 2 through the second connecting part 23. As the die-cast part moves downward, it continues until the edge 3 of the die-cast part separates from the first clamping part 24. At this time, the die-cast part is clamped by point contact only by the second clamping part 25, thereby effectively reducing the dead area area during electroplating or electrodeposition of graphene.

[0063] In the previous embodiment, we introduced how to use the clamping module 2 to achieve large-area and small-area clamping of the edge 3 of the die-casting part to cope with the parting line treatment and anti-corrosion treatment in the surface treatment module. However, for some models of die-casting parts, anti-corrosion treatment may not be necessary. Also, for some relatively soft metals, relying solely on the first clamping part 24 for clamping may result in dents at the clamping location, affecting the flatness of the edge 3 of the die-casting part. Therefore, we provide a second implementation of the clamping module 2. Based on the first implementation, an opening groove 27 is provided on the clamping surface 21. The opening of the opening groove 27 is located at the connection between the clamping surface 21 and the first connecting part 22, such as... Figure 5 , 7As shown, the two ends of the second connecting portion 23 are connected to the two side walls opposite to the opening slot 27 and protrude from the clamping surface 21. The second connecting portion 23 can be as follows: Figure 5 , 6 As shown, the strip-shaped part has a first clamping part 24 disposed on the side wall opposite to the opening of the slot 27. The width Q of the slot 27 is greater than the width q of the first clamping part 24. Figure 7 As shown, a gap is left between the two sides of the first clamping part 24 and the sidewall of the opening slot 27. The clamping module 2 also includes an auxiliary pad 8, which is n-shaped. The opening width of the auxiliary pad 8 is adapted to the width of the frame 3 of the die-cast part to be clamped. The frame 3 of the die-cast part can be directly inserted into the bottom opening of the auxiliary pad 8. Figure 8 , 9 As shown. The outer wall of the auxiliary pad 8 is provided with an abutment groove 81 that abuts against the end of the first clamping part 24. The top wall of the abutment groove 81 is the abutment end. When the auxiliary pad 8 is inserted into the clamping module 2, the end of the first clamping part 24 abuts against the top of the abutment groove 81, as shown. Figure 9 As shown in Figure E, the bottom of the abutment groove 81 is a slope. When the auxiliary pad 8 needs to be removed, the slope can help the first clamping part 24 open, thereby releasing the clamping of the auxiliary pad 8. The abutment groove 81 has protruding ridges 82 on both sides. The ridges 82 abut or engage with the second connecting part 23. When the end of the first clamping part 24 abuts against the side wall of the abutment groove 81, the ridge 82 is located in the gap between the first clamping part 24 and the side wall of the opening groove 27, and the bottom of the ridge 82 will engage with the bottom of the opening groove 27. Figure 9 As shown in Figure E, this design prevents the auxiliary pad 8 from falling off during the transfer of the die-cast part, while also limiting its position. The width t of the auxiliary pad 8 is less than the distance T between the two second clamping portions 25 located on the same surface, so that after the auxiliary pad 8 is installed on the clamping module 2, its two ends can be locked between the two second clamping portions 25 on the clamping surface 21, thereby cooperating with the ridge 82 to limit the auxiliary pad 8. The auxiliary pad 8 can be made of a non-rigid material. After the auxiliary pad 8 is installed on the clamping module 2, the first clamping portion 24 provides clamping force between the auxiliary pad 8 and the edge 3 of the die-cast part. At the same time, the auxiliary pad 8 increases the force-bearing area, which can effectively prevent the edge 3 of the die-cast part from being bent or deformed, so that the transfer equipment can adapt to different types of die-cast parts without replacing the clamping module 2.

[0064] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for improving the corrosion resistance of die-cast parts for automotive backlight modules, characterized in that, The steps are as follows: S1: The die-casting part is removed from the die-casting machine using a transfer device; S2: The transport module delivers the transfer equipment carrying the die-cast parts to the surface treatment module; S3: The surface treatment module processes the parting line of the die-castings on the transfer equipment and performs corrosion-resistant treatment on the die-castings; S4: The transport module delivers the transfer equipment carrying the surface-treated die-cast parts to the finished product area for recycling; The surface treatment module is used to process the parting line on the outer surface of the frame (3) of the die casting and to perform anti-corrosion treatment on the die casting. The transfer device includes: an adjustment module (1) and two clamping modules (2) disposed on the adjustment module (1). The adjustment module (1) is used to adjust the distance between the two clamping modules (2) and to support the two opposite frames of the die casting during surface treatment; The clamping module (2) is used to remove the die-casting part from the die-casting machine and to fix the frame (3) of the die-casting part during surface treatment. The transport module, the adjustment module (1) is disposed on the transport module, the transport module is used to drive the adjustment module (1) to move, so that the die casting part moves from the die casting machine to the surface treatment module; The clamping module (2) consists of two symmetrically arranged clamping surfaces (21), which are a first surface (21a) and a second surface (21b), respectively. The first surface (21a) and the second surface (21b) are connected by a first connecting part (22). The clamping module (2) is n-shaped. The clamping surface (21) is provided with a second connecting part (23) connected to the adjustment module (1), a first clamping part (24) connected to the frame (3) of the die-casting part, and two second clamping parts (25) connected to the side walls of the frame (3) of the die-casting part. A guide part (26) is provided at the bottom of the clamping surface (21). The guide part (26) of the first surface (21a) extends away from the second surface (21b), and the guide part (26) of the second surface (21b) extends away from the first surface (21a). The second clamping part (25) is provided on the guide part (26). The first clamping part (24) and the second clamping part (25) of the first surface (21a) both extend towards the second surface (21b). The first clamping part (24) and the second clamping part (25) of 21b) both extend toward the first surface (21a). The distance d between the end of the first clamping part (24) and the first connecting part (22) is less than the distance D between the top of the second clamping part (25) and the first connecting part (22). The distance r between the ends of the two second clamping parts (25) opposite to the first surface (21a) and the second surface (21b) is less than the distance R between the ends of the two first clamping parts (24) opposite to the first surface (21a) and the second surface (21b). The contact area between the end of the second clamping part (25) and the frame (3) of the die casting is less than the contact area between the end of the first clamping part (24) and the frame (3) of the die casting.

2. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 1, characterized in that, The surface treatment module consists of a parting line treatment section and a coating treatment section. The die casting is clamped by the clamping module (2) and transported to the parting line treatment section to process the parting line on the edge of the die casting. Then it is transported to the coating treatment section to perform surface coating treatment on the die casting.

3. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 2, characterized in that, The die-cast parts are electroplated or electromagnetically deposited with graphene in the coating treatment section.

4. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 1, characterized in that, The adjustment module (1) consists of a hollow main arm (4) and a secondary arm (5) disposed inside the main arm (4). One end of the main arm (4) is provided with a clamping module (2), and the other end is movably connected to one end of the secondary arm (5). The other end of the secondary arm (5) is provided with another clamping module (2). The main arm (4) is provided with an adjustment component (6) and a fixing component (7). The adjustment component (6) passes through the main arm (4) and is movably connected to the secondary arm (5). The fixing component (7) passes through the main arm (4) and is movably connected to the secondary arm (5).

5. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 4, characterized in that, The auxiliary arm (5) is provided with a rack (51) along the axial direction. The adjustment assembly (6) consists of a cover (61) provided on the outer wall of the main arm (4) and a gear (63) movably connected to the cover (61) through an adjustment shaft (62). The two ends of the adjustment shaft (62) pass through the cover (61) and are rotatably connected to the cover (61). The main arm (4) is provided with a first hole. The teeth of the gear (63) mesh with the rack (51) of the auxiliary arm (5) through the first hole.

6. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 4, characterized in that, The main arm (4) is provided with a second hole (41), which is a threaded hole. The fixing component (7) is disposed in the second hole (41). The fixing component (7) is a column with external threads. The fixing component (7) is threadedly connected to the second hole (41). The fixing component (7) passes through the main arm (4) and selectively abuts against the auxiliary arm (5).

7. The method for improving the corrosion resistance of die-cast parts for automotive backlight modules according to claim 1, characterized in that, An opening groove (27) is provided on the clamping surface (21). The opening of the opening groove (27) is located at the connection between the clamping surface (21) and the first connecting part (22). The two ends of the second connecting part (23) are connected to the two side walls opposite to the opening groove (27). The first clamping part (24) is disposed on the side wall opposite to the opening of the opening groove (27). The width Q of the opening groove (27) is greater than the width q of the first clamping part (24). The clamping module (2) also includes an auxiliary pad (8). The auxiliary pad (8) is n-shaped. (8) has an abutment groove (81) on its outer wall that abuts against the end of the first clamping part (24). The abutment groove (81) has protruding ridges (82) on both sides. The ridges (82) abut or snap against the second connecting part (23). When the end of the first clamping part (24) abuts against the side wall of the abutment groove (81), the ridges (82) are located in the gap between the first clamping part (24) and the side wall of the opening groove (27). The width t of the auxiliary pad (8) is less than the distance T between the two second clamping parts (25) located on the same surface.

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