Scraper structure of SLA printing device and coating and processing method

Abstract

This invention relates to the field of photopolymer 3D printing equipment technology, and more particularly to a scraper structure for an SLA printing device. The scraper includes a scraper body, extrusion plates, a guide assembly, and a drive assembly. A pressure chamber within the scraper body is connected to a first press. Extrusion plates are symmetrically arranged within the pressure chamber, and the space between the extrusion plates serves as a resin tank. A guide assembly and a drive assembly are positioned between the extrusion plates. A second press depressurizes the pressure chamber, causing the guide pillars on both sides to retract inwards, driving the extrusion plates to move towards each other. This extrudes the resin within the space between the extrusion plates, causing the resin to flow upwards within the trapezoidal space between the extrusion plates. The second press then pressurizes the extrusion plates, which are then reset by the drive assembly. This extrusion process is repeated multiple times, thereby extruding air bubbles from the resin. During coating, these air bubbles can be avoided from negatively impacting the coating layer, thus preventing any negative effects on the processing quality and yield of the laser printing.

Description

Technical Field

[0001] This invention relates to the field of photopolymer 3D printing equipment technology, and in particular to a scraper structure and coating and processing method for an SLA printing equipment. Background Technology

[0002] As a photopolymer 3D printing device, SLA requires a squeegee to apply resin to the printing layer before each laser print. During the resin application process, the squeegee contains resin; its structure essentially consists of a resin tank and a squeegee surface. When applying resin, the resin in the tank is applied to the surface of the workpiece and then smoothed by the squeegee surface, forming a smooth, thin resin layer. The resin in the tank is manually pre-filled. Resin is a high-viscosity fluid that easily produces air bubbles. This can lead to gaps in the resin layer on the workpiece surface due to the presence of air bubbles during the application process, thus affecting the subsequent processing quality and yield. Summary of the Invention

[0003] One object of the present invention is to provide a scraper structure for an SLA printing device to solve the problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A scraper structure for an SLA printing device is provided, the scraper structure comprising:

[0006] The scraper body contains a pressure chamber, and an air hole is provided on one side of the scraper body. The pressure chamber is connected to a first external press through the air hole, and the side of the pressure chamber near the worktable is open.

[0007] An auxiliary board is provided on the workbench and located on one side of the printing table.

[0008] The sealing plates are provided on both sides of the scraper body;

[0009] The extrusion plates are symmetrically arranged in the pressure chamber, and the space between the extrusion plates is a resin tank for storing resin.

[0010] A guide assembly is provided between the extrusion plates for guiding the opposing or separating movements of the extrusion plates on both sides;

[0011] A driving assembly is provided between the extrusion plates to drive the extrusion plates on both sides to move toward or away from each other.

[0012] As a further improvement to the above solution, the lower end face of the extrusion sheet is flush with the scraper surface of the scraper body, and the space formed between the extrusion sheets is a trapezoidal space.

[0013] As a further improvement to the above solution, the guiding component includes:

[0014] A connecting rod is provided inside the scraper body;

[0015] The guide sleeve is provided at the other end of the connecting rod, and the guide sleeve has a misaligned guide hole;

[0016] The slider is provided on the inner side of each extrusion sheet, and the slider slides in the misaligned guide hole.

[0017] As a further improvement to the above solution, the driving component includes:

[0018] Guide posts are provided on the inner side of each extrusion sheet;

[0019] A pneumatic cylinder is provided between the guide columns, and the guide columns on both sides cooperate with the pneumatic cylinder from both sides respectively;

[0020] The air pipe is located in the middle of the pneumatic cylinder, and the other end of the air pipe extends out of the scraper body and connects to a second external pressure machine.

[0021] As a further improvement to the above solution, the scraper body also includes reinforcing ribs.

[0022] As a further improvement to the above solution, T-shaped grooves are opened on both sides of the outer side of the scraper body.

[0023] As a further improvement to the above solution, the sealing plate is sealed on both sides of the pressure chamber by bolt connection and glue connection.

[0024] As a further improvement to the above solution, the scraper body is a one-piece molded aluminum body structure.

[0025] As a further improvement to the above solution, it also includes an observation window, wherein the observation window is a glass panel on one side of the scraper body.

[0026] The present invention also provides a resin coating process for an SLA printing device, the process being based on the aforementioned scraper structure and comprising the following steps:

[0027] S1: The SLA printing equipment drives the doctor blade body so that the doctor blade surface of the doctor blade body presses against the auxiliary plate. At this time, the pressure chamber is under negative pressure, which adsorbs the resin in the resin tank.

[0028] S2: The second press performs the first action, which reduces the pressure in the air chamber and causes the guide columns on both sides to contract inward, driving the extrusion plates to move towards each other, thereby extruding the resin in the extrusion plates and causing the resin to flow upward in the trapezoidal space between the extrusion plates. Step S2 is performed repeatedly to extrude the air bubbles in the resin upward.

[0029] S3: The SLA printing equipment drives the doctor blade body to move horizontally across the upper surface of the auxiliary plate, making the resin coating surface smooth, and then performs resin coating on the workpiece on the printing table.

[0030] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0031] In this invention, before each resin coating operation using a squeegee, the SLA printing equipment needs to drive the squeegee body so that the squeegee surface presses against the auxiliary plate. Then, the drive assembly drives the extrusion plates to move towards each other, thereby squeezing the resin between them. This causes the resin to flow upward between the extrusion plates, causing air bubbles inside the resin to shift upward within the resin. Then, the drive assembly drives the extrusion plates to move away from each other and reset. After that, the extrusion plates are driven to move towards each other again, and this squeezing is repeated multiple times. This causes the air bubbles inside the resin to shift to the upper part of the uncoated resin layer or to the pressure chamber on the upper side of the resin layer and be expelled. Whether the air bubbles move upward or are expelled from the resin, the adverse effects of air bubbles inside the resin on the coating layer can be avoided during coating, thereby avoiding affecting the processing quality and yield of laser printing. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram showing the usage state of the scraper structure of an SLA printing device according to the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram of the scraper structure of an SLA printing device according to the present invention;

[0035] Figure 3 This is a first cross-sectional schematic diagram of the scraper structure of an SLA printing device according to the present invention;

[0036] Figure 4 This is a second cross-sectional schematic diagram of the scraper structure of an SLA printing device according to the present invention;

[0037] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0038] Figure 6 This is a partial structural diagram of the scraper structure of an SLA printing device according to the present invention;

[0039] The following are the labeling elements in the figure:

[0040] 1. Scraper body; 101. Reinforcing rib; 102. Scraper surface; 103. T-slot; 104. Pressure chamber; 105. Air hole; 2. Worktable; 3. Printing table; 4. Auxiliary plate; 5. Sealing plate; 6. Observation window; 7. Extrusion plate; 8. Guide post; 9. Pneumatic cylinder; 901. Pneumatic chamber; 10. Air pipe; 11. Connecting rod; 12. Guide sleeve; 1201. Guide hole; 13. Slider. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] This invention provides a scraper structure for an SLA printing device, belonging to the technical field of photopolymer 3D printing equipment. Its application scenario is resin coating in SLA printing equipment. It is understood that in existing technologies, SLA, as a photopolymer 3D printing device, requires a scraper to coat the printing layer with resin before each laser print. During resin coating, the scraper contains resin; essentially, its structure includes a resin tank and a scraper surface. When coating the workpiece, the resin in the resin tank is applied to the surface of the workpiece and then smoothed by the scraper surface, forming a smooth, thin resin layer. The resin in the resin tank is manually pre-filled. Resin is a high-viscosity fluid that easily generates air bubbles. This leads to gaps the size of air bubbles in the resin layer on the workpiece surface during coating, affecting the subsequent processing quality and yield.

[0046] Therefore, how to provide a scraper structure for SLA printing equipment that can avoid the influence of resin bubbles and a resin coating process for SLA printing equipment have become urgent technical problems to be solved.

[0047] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] refer to Figure 1-6This invention provides a scraper structure for an SLA printing device. The scraper structure includes a scraper body 1, an auxiliary plate 4, a sealing plate 5, extrusion plates 7, a guide assembly, and a drive assembly. The scraper body 1 contains a pressure chamber 104. An air hole 105 is provided on one side of the scraper body 1. The pressure chamber 104 is connected to an external first press through the air hole 105. The side of the pressure chamber 104 near the worktable 2 is open. The auxiliary plate 4 is disposed on the worktable 2 and located on one side of the printing table 3. The sealing plates 5 are disposed on both sides of the scraper body 1. The extrusion plates 7 are symmetrically arranged in the pressure chamber 104. The space between the extrusion plates 7 is a resin tank for storing resin. The guide assembly is disposed between the extrusion plates 7 for guiding the extrusions on both sides to move in opposite directions or away from each other. The drive assembly is disposed between the extrusion plates 7 for driving the extrusions on both sides to move in opposite directions or away from each other.

[0049] For example, in an SLA photopolymerization 3D printing device, a squeegee is used to apply resin to the printing layer before each laser print. Therefore, the squeegee must contain resin. In this embodiment, the space between the extrusion plates 7 is a resin tank for storing resin. The resin is usually placed in the resin tank manually in advance. Before applying resin to the printing layer using the squeegee, the first pressure machine draws pressure, so that the pressure in the pressure chamber 104 is in a negative pressure state, which can effectively adsorb the resin in the resin tank and prevent the resin from falling off during the movement of the squeegee structure. At the same time, the SLA printing device needs to drive the squeegee body 1 so that the squeegee surface 102 of the squeegee body 1 is pressed. On the auxiliary plate 4, the drive assembly drives the extrusion plates 7 to move towards each other, thereby extruding the resin between them. This causes the resin to flow upward between the extrusion plates 7, causing the air bubbles inside the resin to shift upward within the resin. Then, the drive assembly drives the extrusion plates 7 to move away from each other and reset. After that, the extrusion plates 7 are driven to move towards each other again, and the extrusion is repeated multiple times. This causes the air bubbles inside the resin to shift to the upper part of the uncoated resin layer or to the pressure chamber 104 on the upper side of the resin layer and be discharged. Whether the air bubbles move upward or are discharged from the resin, the adverse effects of air bubbles inside the resin on the coating layer can be avoided during coating, thereby avoiding affecting the processing quality and yield of laser printing.

[0050] After the air bubbles move to the upper part of the uncoated resin layer or are expelled from the resin, the SLA printing equipment drives the doctor blade body 1 to move horizontally across the upper surface of the auxiliary plate 4, making the resin coating surface smooth, and then performs resin coating on the workpiece on the printing table 3.

[0051] It should be noted that during the process of the driving component driving the extrusion plates 7 to move towards or away from each other, the guide component between the extrusion plates 7 plays a guiding role and stabilizes the movement process of the extrusion plates 7 towards or away from each other.

[0052] In this embodiment, the lower end face of the extrusion sheet 7 is flush with the scraper surface 102 of the scraper body 1. The space formed between the extrusion sheets 7 is a trapezoidal space. The resin flows upward in the trapezoidal space, which is smaller at the top and larger at the bottom. The flow velocity at the top is greater than that at the bottom, and the pressure at the top is less than that at the bottom. The air bubbles inside the resin shift upward and are discharged into the upper part of the uncoated resin layer or into the pressure chamber 104 on the upper side of the resin layer. At the same time, the negative pressure of the pressure chamber 104 also helps the air bubbles to move upward and be discharged.

[0053] Example 2 differs from Example 1 in that, with reference to Figure 2-6 The guiding assembly includes a connecting rod 11, a slider 13, and a guide sleeve 12. The connecting rod 11 is provided inside the scraper body 1, and the guide sleeve 12 is provided at the other end of the connecting rod 11. The guide sleeve 12 has a misaligned guide hole 1201. The slider 13 is provided on the inner side of the extrusion sheet 7, and the slider 13 slides in the misaligned guide hole 1201.

[0054] The drive assembly includes guide posts 8, pneumatic cylinders 9, and air pipes 10. The guide posts 8 are provided on the inner side of the extrusion plate 7, and the pneumatic cylinders 9 are provided between the guide posts 8. The guide posts 8 on both sides cooperate with the pneumatic cylinders 9 from both sides. The air pipes 10 are provided in the middle of the pneumatic cylinders 9, and the other end of the air pipes 10 passes through the scraper body 1 and communicates with the second press in the outside.

[0055] For example, during the process of the driving component driving the extrusion plate 7 to move, the second press draws pressure, which reduces the pressure in the air chamber 901 through the air pipe 10, making the pressure in the air chamber 901 less than the pressure in the pressure chamber 104. This causes the guide posts 8 on both sides to slide towards each other, thereby driving the extrusion plate 7 to move towards each other and extruding the resin. Afterward, the second press releases the pressure, which increases the pressure in the air chamber 901, making the pressure in the air chamber 901 greater than the pressure in the pressure chamber 104. This causes the guide posts 8 on both sides to slide away from each other, thereby causing the extrusion plate 7 to separate and reset. This process is repeated multiple times, thereby extruding the air bubbles in the resin upward.

[0056] During the movement of the extrusion sheet 7, the sliders 13 on both sides slide back and forth in the misaligned guide holes 1201. The guide holes 1201 are square holes, and the sliders 13 are also square sliders 13, which play a horizontal guiding role in the movement of the extrusion sheet 7.

[0057] It should be noted that the accompanying drawings of this invention are schematic diagrams, and not all structures are depicted in the drawings. Figure 5In the pneumatic cylinder 9, protrusions for limiting the movement are provided on both sides near the air pipe 10. The limiting protrusions can prevent the guide post 8 from moving in opposite directions and blocking the connection between the pneumatic cylinder 9 and the air pipe 10.

[0058] Furthermore, the scraper body 1 also includes reinforcing ribs 101, which can stabilize the overall structure of the scraper body 1.

[0059] Furthermore, T-shaped grooves 103 are formed on both sides of the outer surface of the scraper body 1.

[0060] Furthermore, the sealing plate 5 is sealed on both sides of the pressure chamber 104 by bolt and glue connection to ensure the airtightness of the pressure chamber 104.

[0061] Furthermore, the scraper body 1 is an integrally formed aluminum body structure.

[0062] Furthermore, it also includes an observation window 6, which is a glass observation window 6 provided on one side of the scraper body 1, so as to facilitate observation of the amount of resin inside the scraper body 1.

[0063] Example 3: During the production of this scraper structure, the technicians encountered many processing difficulties. In order to solve these difficulties, this example provides a processing method for the scraper structure in the above examples, specifically a processing method for the scraper body 1.

[0064] Currently, SLA (Silicon Lamination) 3D printing equipment requires a squeegee to apply resin to the printing layer before each laser print. Therefore, the squeegee must contain resin, and the coated surface at the bottom of the squeegee must be parallel to the liquid surface. Current squeegees are made by hollowing out the middle of a single long strip of aluminum to create a groove-shaped space. The bottom of the squeegee needs to be milled flat, and T-shaped grooves are required on both sides. To ensure the strength and hardness of the cutting edge grooves on both sides, the cutting edge grooves are split into long strips of stainless steel. Milling the internal groove space results in a significant waste of processing time and raw materials. Furthermore, the internal stress makes the squeegee prone to deformation during subsequent use, as the split stainless steel cutting edge cannot be machined in one go, increasing processing difficulty and cumulative errors.

[0065] The current method for machining the scraper body 1 involves hollowing out an internal groove from a single long strip of aluminum material. This results in excessive machining, leading to high internal stress in the scraper after machining. This stress can cause slow deformation in the future, and under the weight of the scraper, it severely affects the flatness accuracy of the scraper bottom. Furthermore, the stainless steel T-slots and internal material hollowing that are separated on both sides of the scraper are machined in three directions and require three clamping operations. This increases the error during the clamping process and significantly impacts the overall accuracy of the part.

[0066] To address the challenges in the existing scraper body 1 machining process, in this embodiment, the scraper body 1 is formed directly from an aluminum profile, with the internal slots directly molded. T-shaped end mills are used to machine the T-shaped grooves 103 (angled grooves) on both sides of the scraper. The scraper body 1 is then secured at both ends with sealing plates 5 coated with adhesive, forming a semi-enclosed pressure chamber 104 (groove-shaped space). Using an aluminum profile to directly create the internal slots significantly reduces CNC machining, decreases internal stress formation, and lowers the likelihood of subsequent deformation. Furthermore, the application of T-shaped end mills reduces the three clamping processes to one, improving machining efficiency and precision.

[0067] In this embodiment, the specific processing procedure for the scraper body 1 is as follows:

[0068] 1. Using the aluminum drawing process, the inner groove (pressure chamber 104) of the scraper is directly made to form the space inside the scraper body 1. The profile needs to be placed for more than three months from the time it is made to the time it is CNC machined to increase the stress stability of the profile.

[0069] 2. Mill the upper surface of the scraper body 1 flat to serve as the machining reference surface;

[0070] 3. Using the upper plane of the scraper body 1 as a reference, clamp the scraper body 1 on the CNC platform, use a flat milling cutter to mill the bottom of the scraper body 1 to form the scraper surface 102, and then use a T-shaped end milling cutter to mill out the angled grooves on both sides. The flatness of the bottom plane needs to reach 0.01mm, and the surface finish of the bottom plane and the angled grooves on both sides needs to reach 1.6.

[0071] 4. Apply an appropriate amount of sealant to the contact surface of the sealing plate 5, and then lock it to both ends of the scraper body 1. The bottom of the sealing plate 5 should not be higher than the scraper surface 102 at the bottom of the scraper.

[0072] 5. Arrange for hard anodizing treatment on the scraper surface 102 at the bottom of the scraper body 1 to improve the hardness of the T-groove 103 and the service life of the scraper.

[0073] Example 4: The present invention also provides a resin coating process for an SLA printing device, the process being based on the aforementioned doctor blade structure and comprising the following steps:

[0074] 1. The SLA printing equipment drives the doctor blade body 1 so that the doctor blade surface 102 of the doctor blade body 1 presses on the auxiliary plate 4. At this time, the pressure chamber 104 is under negative pressure, which adsorbs the resin in the resin tank.

[0075] 2. The second press performs decompression, which reduces the pressure in the air chamber 901. The guide posts 8 on both sides retract inward, causing the extrusion plates 7 to move towards each other, thereby extruding the resin in the space between the extrusion plates 7. The resin flows upward in the trapezoidal space between the extrusion plates 7. The second press performs pressurization, and the extrusion plates 7 are reset under the action of the drive component. Step S2 is repeated multiple times, thereby squeezing the air bubbles in the resin upward.

[0076] 3. The SLA printing equipment drives the doctor blade body 1 to move horizontally across the upper surface of the auxiliary plate 4, making the resin coating surface smooth, and then performs resin coating on the workpiece on the printing table 3.

[0077] In one embodiment, the above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A scraper structure for an SLA printing device, characterized in that, The scraper structure includes: The scraper body contains a pressure chamber, and an air hole is provided on one side of the scraper body. The pressure chamber is connected to a first external press through the air hole, and the side of the pressure chamber near the worktable is open. An auxiliary board is provided on the workbench and located on one side of the printing table. The sealing plates are provided on both sides of the scraper body; The extrusion plates are symmetrically arranged in the pressure chamber, and the space between the extrusion plates is a resin tank for storing resin. A guide assembly is provided between the extrusion plates for guiding the extrusion plates on both sides to move toward or away from each other; A driving assembly is provided between the extrusion plates to drive the extrusion plates on both sides to move toward each other or away from each other. The lower end face of the extrusion sheet is flush with the scraper surface of the scraper body. The space formed between the extrusion sheets is a trapezoidal space. The resin moves upward and flows within the trapezoidal space, which is smaller at the top and larger at the bottom. The flow velocity at the top is greater than that at the bottom, and the pressure at the top is less than that at the bottom.

2. The scraper structure according to claim 1, characterized in that, The lower end face of the extrusion sheet is flush with the scraper surface of the scraper body, and the space formed between the extrusion sheets is a trapezoidal space.

3. The scraper structure according to claim 2, characterized in that, The guiding component includes: The connecting rod is provided inside the scraper body; The guide sleeve is provided at the other end of the connecting rod, and the guide sleeve has a misaligned guide hole; The slider is provided on the inner side of each extrusion sheet, and the slider slides in the misaligned guide hole.

4. The scraper structure according to claim 3, characterized in that, The driving component includes: Guide posts are provided on the inner side of each extrusion sheet; A pneumatic cylinder is provided between the guide columns, and the guide columns on both sides cooperate with the pneumatic cylinder from both sides respectively; The air pipe is located in the middle of the pneumatic cylinder, and the other end of the air pipe extends out of the scraper body and connects to a second external pressure machine.

5. The scraper structure according to claim 4, characterized in that, The scraper body also includes reinforcing ribs, and T-shaped grooves are opened on both sides of the outer side of the scraper body.

6. The scraper structure according to claim 5, characterized in that, The sealing plates are sealed on both sides of the pressure chamber by bolt and glue connections.

7. The scraper structure according to claim 6, characterized in that, The scraper body is a one-piece molded aluminum structure.

8. The scraper structure according to claim 7, characterized in that, It also includes an observation window, wherein the observation window is provided with glass on one side of the scraper body.

9. A resin coating process for an SLA printing device, said process being based on the doctor blade structure as described in claim 8, characterized in that, Includes the following steps: S901: The SLA printing equipment drives the doctor blade body so that the doctor blade surface of the doctor blade body presses against the auxiliary plate. At this time, the pressure chamber is under negative pressure, which adsorbs the resin in the resin tank. S902: The second press performs the first action, which reduces the pressure in the air chamber, causes the guide columns on both sides to contract inward, and drives the extrusion plates to move towards each other, thereby extruding the resin in the extrusion plate chamber, causing the resin to flow upward in the trapezoidal space between the extrusion plates. Step S2 is performed repeatedly to extrude the air bubbles in the resin upward. S903: The SLA printing equipment drives the doctor blade body to move horizontally across the upper surface of the auxiliary plate, making the resin coating surface smooth, and then performs resin coating on the workpiece on the printing table.

10. A method for processing a scraper structure in an SLA printing device, wherein the scraper structure is based on the scraper structure as described in claim 8, and the processing method is a method for processing the scraper body, characterized in that... Includes the following steps: S101: Using the aluminum drawing process, the pressure chamber is directly made to form the space inside the scraper body. The profile needs to be placed for more than three months from the time it is made to the time it is CNC machined to increase the stress stability of the profile. S102: Mill the upper surface of the scraper body flat to serve as a machining reference surface; S103: Using the upper plane of the scraper body as a reference, clamp the scraper body on the CNC platform, use a flat milling cutter to mill the bottom of the scraper body to form the scraper surface, and then use a T-shaped end milling cutter to mill out the T-shaped grooves on both sides. The flatness of the scraper surface needs to reach 0.01mm, and the surface finish of the scraper surface and the T-shaped grooves on both sides needs to reach 1.

6. S104: Apply an appropriate amount of sealant to the contact surface of the sealing plate, and then lock it to both ends of the scraper body. The bottom of the sealing plate should not be higher than the scraper surface. S105: Arrange for hard anodizing treatment on the scraper surface at the bottom of the scraper body.

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