An electrostatic sand planting structure and electrostatic sand planting device for improving sand planting uniformity
The electrostatic sand planting structure addresses uneven sand distribution by using a screen to homogenize particles before adherence, ensuring even distribution and improved product quality.
Patent Information
- Application Number
- CN201910971185.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-14
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-10-14
AI Technical Summary
Existing electrostatic sand planting methods suffer from uneven distribution of sand particles on substrates due to collisions and lack of uniformity, affecting the quality of the resulting products.
An electrostatic sand planting structure that includes a conveyor belt, upper and lower electrode plates, a substrate walking path, and a screen between the conveyor belt and the path, where sand particles are homogenized by a screen before adhering to the substrate, ensuring even distribution.
The structure improves sand planting uniformity, resulting in more even distribution of sand particles on the substrate, enhancing the quality of the produced products.
Smart Images
Figure CN110605222B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an electrostatic sand planting structure and electrostatic sand planting equipment for improving sand planting uniformity, belonging to the technical field of electrostatic sand planting equipment. Background Art
[0002] At present, electrostatic sand planting operations on substrates generally use reverse sand planting or forward sand planting.
[0003] Electrostatic sand planting device for reverse sand planting Figure 1 As shown, the sand particles 7 fall onto the sand conveying belt 1 through the sand lowering device 2 and are transported between the upper electrode plate 3 and the lower electrode plate 4. Under the action of the electric field generated between the upper electrode plate 3 and the lower electrode plate 4, the sand particles 7 rise and adhere to the substrate 6 coated with an adhesive. The substrate 6 is then guided by the substrate guide roller 5 into the oven for curing. This device is called reverse sand planting because the movement direction of the sand particles on the sand conveying belt is opposite to that of the substrate.
[0004] and Figure 1 The reverse sand planting is different from the electrostatic sand planting device shown in the figure. Figure 2 As shown, the movement direction of the sand grains on the sand conveyor belt 1 of this device is the same as the movement direction of the substrate, so it is called forward sand planting. These two sand planting methods adopt the existing electrostatic sand planting method: the substrate 6 with adhesive attached is made to walk through the electric field, and the sand grains 7 are transmitted into the electric field. Under the action of the electric field, the sand grains 7 rise and adhere to the substrate 6. In these two sand planting methods, the sand grains directly rise and adhere to the substrate under the action of the electric field generated by the upper and lower plates. The uniformity of sand planting is greatly affected by the uniformity of the lower sand. At the same time, the mutual collision between the sand grains in the electric field will also cause local uneven sand planting. Summary of the invention
[0005] The object of the present invention is to provide an electrostatic sand planting structure and an electrostatic sand planting equipment for improving the uniformity of sand planting in response to the above-mentioned problems. When the present invention is used to carry out sand planting operations on a substrate, the uniformity of sand planting can be improved, so that the sand particles can be more evenly distributed on the substrate.
[0006] The technical solution adopted by the present invention is as follows:
[0007] An electrostatic sand planting structure for improving the uniformity of sand planting comprises a conveyor belt, an upper electrode plate and a lower electrode plate; wherein the upper electrode plate is arranged above the lower electrode plate and is used to generate an electric field for causing sand particles to move upward; the conveyor belt is arranged between the upper electrode plate and the lower electrode plate and is used to transport sand particles; a substrate walking path is located between the upper electrode plate and the conveyor belt, and the substrate walking path is the path along which the substrate walks during sand planting; and a screen is also included, which is arranged between the conveyor belt and the substrate walking path and is used to homogenize the sand particles, so that the sand particles first rise and pass through the screen to be homogenized, and then adhere to the substrate.
[0008] When the electrostatic sand planting structure of the present invention is used to carry out sand planting operations on a substrate, the principle of the operation process is: the substrate with an adhesive attached moves along the substrate walking path between the upper electrode plate and the conveyor belt, the substrate moves above the screen, and the screen is located above the conveyor belt. An electric field is generated between the upper electrode plate and the lower electrode plate to cause the sand particles to move upward. When the sand particles are transported to between the upper electrode plate and the lower electrode plate through the conveyor belt, the sand particles move upward under the action of the electric field. Thanks to the design of the screen, the screen is on the rising path of the sand particles, and the sand particles can only be attached to the substrate after being homogenized by the screen, thereby improving the uniformity of the sand planting and allowing the sand particles to be more evenly distributed on the substrate.
[0009] An electrostatic sand planting device comprises the electrostatic sand planting structure mentioned above.
[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:
[0011] The present invention discloses an electrostatic sand planting structure and an electrostatic sand planting device for improving the uniformity of sand planting. The present invention has an ingenious conception. When the present invention is used to carry out sand planting operations on a substrate, the uniformity of sand planting can be improved, so that the sand particles can be more evenly distributed on the substrate, and the quality of the products produced is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will now be described by way of example with reference to the accompanying drawings, in which:
[0013] Figure 1 It is a schematic diagram of the electrostatic sand planting structure of reverse sand planting of the background technology;
[0014] Figure 2 It is a schematic diagram of the electrostatic sand planting structure of the same-direction sand planting of the background technology;
[0015] Figure 3 This is a principle diagram of the electrostatic sand planting structure for improving the uniformity of sand planting in reverse sand planting of the present invention;
[0016] Figure 4 This is a principle diagram of the electrostatic sand planting structure for improving the uniformity of sand planting in the same direction of the present invention;
[0017] Figure 5 It is a schematic diagram of the reeling and unreeling device of the present invention making the screen run between the conveyor belt and the substrate walking path;
[0018] Figure 6 It is a schematic diagram of the present invention, in which the moving direction of the screen is substantially perpendicular to the moving direction of the substrate when viewed from a top view.
[0019] Markings in the figure: 1- conveyor belt, 2- sand unloading device, 21- lower hopper, 22- lower sand roller, 3- upper electrode plate, 4- lower electrode plate, 5- guide roller, 6- substrate, 6'- substrate walking path, 7- sand grains, 8- screen, 9- winding and unwinding device, 91- unwinding shaft, 92- unwinding guide roller, 93- winding guide roller, 94- winding shaft. DETAILED DESCRIPTION
[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0021] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0022] In the present invention, the substrate walking path 6' refers to the path that the substrate 6 walks during the sand planting operation, and the substrate 6 walks between the upper plate 3 and the conveyor belt 1 with the help of the guiding effect of the guide roller 5. Figure 1 , Figure 2 As shown, the substrate 6 can be made to move between the upper electrode plate and the conveyor belt (or the lower electrode plate). The guide roller 5 of the existing electrostatic sand planting equipment mainly plays a guiding role. Therefore, in the present invention, how to make the substrate 6 move between the upper electrode plate 3 and the conveyor belt 4 does not present a technical difficulty. It can refer to the existing technical means. The main technical problem solved by the present invention is how to improve the uniformity of sand planting. Therefore, the movement of the substrate 6 can adopt the existing technical means, and the present invention will not go into details.
[0023] Embodiment 1
[0024] like Figures 3 to 6 As shown, an electrostatic sand planting structure for improving the uniformity of sand planting in embodiment 1 includes a conveyor belt 1, an upper electrode plate 3, and a lower electrode plate 4; wherein the upper electrode plate 3 is arranged above the lower electrode plate 4, and is used to generate an electric field that causes sand particles to move upward; the conveyor belt 1 is arranged between the upper electrode plate 3 and the lower electrode plate 4, and is used to transport sand particles; a substrate walking path 6' is located between the upper electrode plate 3 and the conveyor belt 1, and the substrate walking path 6' is the path along which the substrate 6 walks during sand planting; and also includes a screen 8, which is arranged between the conveyor belt 1 and the substrate walking path 6' and is used to homogenize the sand particles 7, so that the sand particles 7 first rise and pass through the screen 8 to be homogenized, and then adhere to the substrate 6.
[0025] When the electrostatic sand planting structure of the present invention is used to carry out the sand planting operation of the substrate 6, the principle of the operation process is: the substrate 6 with adhesive attached thereto walks along the substrate walking path 6' between the upper electrode plate 3 and the conveyor belt 1, the substrate 6 walks above the screen 8, and the screen 8 is located above the conveyor belt 1, and an electric field is generated between the upper electrode plate 3 and the lower electrode plate 4 to make the sand particles move upward. When the sand particles 7 are transported to between the upper electrode plate 3 and the lower electrode plate 4 through the conveyor belt 1, the sand particles 7 move upward under the action of the electric field. Thanks to the design of the screen 8, the screen 8 is in the electric field formed between the upper electrode plate 3 and the lower electrode plate 4, and is on the rising path of the sand particles. Then the sand particles 7 will be homogenized by the screen 8 before they can be attached to the substrate 6, thereby improving the uniformity of the sand planting, so that the sand particles 7 can be more evenly distributed on the substrate 6.
[0026] Further, such as Figure 5 As shown, it also includes a reeling device, through which the screen 8 can move between the conveyor belt 1 and the substrate walking path 6'. When the sand planting operation is performed, the screen 8 is in a moving state, and the screen 8 moves through the electric field.
[0027] Further, such as Figure 5As shown, the unwinding and rewinding device 9 includes an unwinding shaft 91 and an unwinding guide roller 92 arranged on one side of the upper electrode plate 3 and the lower electrode plate 5, and a rewinding guide roller 93 and a rewinding shaft 94 arranged on the other side of the upper electrode plate 3 and the lower electrode plate 5; after the rolled screen 8 is installed on the unwinding shaft 91, the screen 8 passes through the conveyor belt 1 and the substrate walking path 6' through the unwinding guide roller 92, and then is connected to the rewinding shaft 94 through the rewinding guide roller 93. The purpose of making the screen 8 walk between the conveyor belt 1 and the substrate walking path 6' can be achieved. The sand planting operation of the substrate 6 is a continuous process. As time goes by, if the screen 8 is in a stationary state, individual meshes of the screen 8 may be blocked by sand particles 7, affecting the uniformity of the sand planting. Therefore, the present invention uses the reeling device 9 to unfold the rolled screen 8, and then 8 slowly moves between the conveyor belt 1 and the substrate walking path 6'. The unwinding shaft 91 unwinds the new screen 8, and the reeling shaft 94 rewinds the used screen 8. This allows new screens 8 to continuously enter the power field, while the used screens 8 leave the power field, which improves the stability of uniform sand planting and further ensures that the sand particles 7 can be more evenly distributed on the substrate 6. After the rolled screen 8 installed on the unwinding shaft 91 is used up, the new rolled screen 8 can be replaced to continue the sand planting operation. When necessary, the rewinding speed of the rewinding device 9 is adjusted by the frequency converter (not shown) of the rewinding device 9, thereby controlling the walking speed of the screen. When performing sand planting operations for products with different requirements, the screen 8 with an appropriate mesh size can be replaced according to the size of the specific sand particles. The screen 8 can be a screen made of a mixture of one or more materials selected from polyester, nylon, glass fiber, cotton, and linen. The mesh of the screen 8 can be in the shape of square, rectangle, diamond, circle, oval, etc. Further, when viewed from above, the moving direction of the screen 8 intersects with the moving direction of the substrate 6. Preferably, when viewed from above, the moving direction of the screen 8 is substantially perpendicular to the moving direction of the substrate 6, such as Figure 6 shown.
[0028] Furthermore, a tensioning mechanism is connected to the unwinding guide roller 92 and / or the winding guide roller 93 for tensioning the screen 8. When the sand planting operation is performed, the screen 8 can be in a tensioned state, which can further ensure that the sand particles 7 can be more evenly distributed on the substrate 6. The tensioning mechanism is a magnetic powder brake (not shown) mounted on the end of the unwinding guide roller 92 and / or the winding guide roller 93. Preferably, the magnetic powder brake is mounted on the end of the most downstream unwinding guide roller 92a; or, the magnetic powder brake is mounted on the end of the most upstream winding guide roller 93a; or, the ends of the unwinding guide roller 92a and the winding guide roller 93a are both equipped with magnetic powder brakes.
[0029] Furthermore, a vibration mechanism is connected to the unwinding guide roller 92 and / or the winding guide roller 93 for vibrating the screen 8. When the sand planting operation is performed, the screen 8 can be placed in a vibrating state. It can avoid the accumulation of sand particles at the bottom of the screen that affects the uniform sand planting effect, further improve the stability of the uniform sand planting, and ensure that the sand particles 7 can be more evenly distributed on the substrate 6. The vibration mechanism is a vibrator (not shown, such as a vibration motor) mounted on the end of the unwinding guide roller 92 and / or the winding guide roller 93. Preferably, the vibrator is mounted on the end of the most downstream unwinding guide roller 92a; or, the vibrator is mounted on the end of the most upstream winding guide roller 93a; or, the ends of the unwinding guide roller 92a and the winding guide roller 93a are both equipped with vibrators. Obviously, the tensioning mechanism and the vibration mechanism are not mutually exclusive solutions, and can be combined with each other.
[0030] Preferably, the width b of the screen is not less than the width b1 of the upper plate and / or the width b2 of the lower plate. That is, b≥b1, or / and, b≥b2. The upper plate and the lower plate generate an electric field for the sand particles to move upward; for example, the width b2 of the lower plate is smaller than the width b1 of the upper plate, that is, b1≥b2, then the width of the electric field is basically not greater than the width b2 of the lower plate. In order to ensure that all the sand particles 7 must first rise through the screen 8 to be homogenized and then attached to the substrate 6, then the width b of the screen is not less than the width b1 of the upper plate and / or the width b2 of the lower plate. This is the best choice, so that the screen 8 can cover the entire rising path of the sand particles 7 (the rising path of the sand particles 7 is determined by the electric field). Specifically, the width b of the mesh may be not less than the width b1 of the upper electrode plate; or, the width b of the mesh may be not less than the width b2 of the lower electrode plate; or, the width b of the mesh may be not less than the width b1 of the upper electrode plate and the width b2 of the lower electrode plate.
[0031] Preferably, Figure 5As shown, the distance h1 between the screen and the conveyor belt is less than the distance h2 between the screen and the substrate walking path. That is, h1<h2, then the distance between the screen 8 and the rising starting point of the sand particles 7 is less than the distance between the screen 8 and the rising end point of the sand particles 7. It is not difficult to understand that the top surface of the conveyor belt 1 is basically the rising starting point of the sand particles, and the bottom surface of the substrate 6 (substrate walking path 6') is basically the rising end point of the sand particles. Those skilled in the art are well aware that the sand particles of electrostatic sand planting are sucked up by the electric field force of the electric field, and the shapes of the sand particles are different, but in general, it can be considered that the point of action of the electric field force acts on the center of gravity of the sand particles, so the big head of the sand particles faces inward, and the small head and pointed head face outward. The big head is firmly glued to the belt base by glue, and the pointed head faces outward, so the sandpaper and sand cloth are sharpened, forming a product with excellent grinding performance. This is the advantage of electrostatic sand planting. When this design is adopted, h1<h2, that is, the screen 8 is closer to the conveyor belt (or the screen 8 is closer to the rising starting point of the sand particles), then the original advantages of electrostatic sand planting will basically not be affected. If h1>h2, that is, the screen 8 is closer to the substrate 6 (or the screen 8 is closer to the rising end point of the sand particles), the sand particles will pass through and collide with the screen 8, and their spatial position will be changed. After passing through the screen 8, they will not have time to recover to the state of "big head facing inward and small head and pointed head facing outward" and will be attached to the substrate 6. Although the sand particles 7 can be distributed more evenly on the substrate 6 at this time, the sharpness of the finished product will be affected. Therefore, it is the best choice that the distance h1 between the screen and the conveyor belt is less than the distance h2 between the screen and the substrate walking path.
[0032] Preferably, the mesh size of the screen 8 is 5 meshes to 600 meshes. The screen 8 with the required mesh size can be selected according to actual needs to match the mesh size of the sand particles.
[0033] Further, at least one grain of sand can pass through any mesh of the screen 8. Preferably, the mesh size of the screen 8 is about 2 to 8 times the size of the sand grain.
[0034] Further, such as Figures 3 to 5 As shown, the conveying surface of the conveyor belt 1 is located between the upper plate 3 and the lower plate 4. The conveying surface of the conveyor belt 1 is used to convey sand. Preferably, the lower plate 4 is close to the back of the conveying surface of the conveyor belt 1.
[0035] Furthermore, the moving direction of the substrate 6 is the same as or opposite to the transport direction of the sand particles 7. Figure 3 As shown, when the moving direction of the substrate 6 is opposite to the transport direction of the sand particles 7, a reverse sand planting action is achieved; Figure 4 As shown, when the moving direction of the substrate 6 is the same as the transport direction of the sand particles 7, a forward sand planting action is achieved.
[0036] Further, such as Figure 3 , Figure 4As shown, the sand discharging device 2 is also included. The sand discharging device 2 is arranged above the conveyor belt 1 and is used to supply sand grains 7 to the conveyor belt 1. The sand grains 7 can be continuously transmitted to the electric field to ensure the continuity of the electrostatic sand planting operation. The sand discharging device 2 includes a lower hopper 21 for storing the sand grains 7, and a lower sand roller 22 for releasing the sand grains 7 is provided at the bottom of the lower hopper.
[0037] Embodiment 2
[0038] An electrostatic sand implanting device according to the second embodiment includes the electrostatic sand implanting structure according to the first embodiment.
[0039] To sum up, the electrostatic sand planting structure and electrostatic sand planting equipment of the present invention for improving the uniformity of sand planting can improve the uniformity of sand planting when the sand planting operation of the substrate is performed, so that the sand particles can be more evenly distributed on the substrate, and the quality of the produced products is better.
[0040] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.
Claims
1. An electrostatic sand planting structure for improving sand planting uniformity, comprising a conveyor belt (1), an upper electrode plate (3), and a lower electrode plate (4); wherein: The upper electrode plate (3) is arranged above the lower electrode plate (4) and is used to generate an electric field to move sand particles upward; The conveyor belt (1) is arranged between the upper electrode plate (3) and the lower electrode plate (4) and is used to convey sand particles; The substrate walking path (6') is located between the upper electrode plate (3) and the conveyor belt (1), and the substrate walking path (6') is the path along which the substrate (6) walks when sand is planted; The invention is characterized in that: it also includes a screen (8), which is arranged between the conveyor belt (1) and the substrate walking path (6') and is used to homogenize the sand particles (7), so that the sand particles (7) first rise and pass through the screen (8) to be homogenized, and then adhere to the substrate (6); any mesh of the screen (8) can pass at least one grain of sand, and the mesh size of the screen (8) is 2 to 8 times the size of the sand particles; the distance h1 between the screen and the conveyor belt is less than the distance h2 between the screen and the substrate walking path; and it also includes a reeling device, through which the screen (8) can be moved between the conveyor belt (1) and the substrate walking path (6'). The unwinding and reeling device (9) comprises an unwinding shaft (91) and an unwinding guide roller (92) arranged on one side of the upper electrode plate (3) and the lower electrode plate (4), and a rewinding guide roller (93) and a rewinding shaft (94) arranged on the other side of the upper electrode plate (3) and the lower electrode plate (4); after the rolled screen (8) is mounted on the unwinding shaft (91), the screen (8) passes through between the conveyor belt (1) and the substrate walking path (6') through the unwinding guide roller (92), and is then connected to the rewinding shaft (94) through the rewinding guide roller (93); a vibration mechanism is connected to the unwinding guide roller (92) and / or the rewinding guide roller (93) for vibrating the screen (8).
2. The electrostatic sand planting structure according to claim 1, characterized in that: The unwinding guide roller (92) and / or the winding guide roller (93) are connected to a tensioning mechanism for tensioning the screen (8).
3. The electrostatic sand planting structure according to claim 1, characterized in that: The width b of the screen is not less than the width b1 of the upper electrode plate and / or the width b2 of the lower electrode plate.
4. The electrostatic sand planting structure according to claim 1, characterized in that: The mesh size of the screen (8) is 5-600 meshes.
5. The electrostatic sand planting structure according to claim 1, characterized in that: The conveying surface of the conveyor belt (1) is located between the upper electrode plate (3) and the lower electrode plate (4).