Sand coating device and sand coating method for waterproof roll

Abstract

The invention discloses a waterproof roll sand coating device and a sand coating method, and relates to the technical field of waterproof material production equipment. The device comprises a quantitative feeding mechanism which communicates with the bottom surface of a sand storage mechanism and is used for quantitatively discharging sand in the sand storage mechanism; the ionization mechanism is internally provided with a sand material electricity attaching mechanism and is used for polarizing the passing sand material; the high-voltage electrostatic spreading roller is used for electrostatic adsorption of sand and is arranged below the discharging part of the ionization mechanism; the sand passing through the ionization mechanism carries charges with the polarity opposite to that of the high-voltage electrostatic spreading roller; the high-voltage feeding roller is used for supporting and conveying the coiled material, so that the coiled material horizontally passes through the lower part of the high-voltage electrostatic spreading roller, and the high-voltage feeding roller is connected with the direct-current high-voltage generator in a conducting manner, so that the coiled material for conveying carries voltage with the polarity opposite to that of the high-voltage electrostatic spreading roller; the problems that an existing sand coating device is insufficient in uniformity, adhesive force, material utilization rate, environment friendliness and high-speed production adaptability are solved.

Description

Technical Field

[0001] This invention relates to the field of waterproof material production equipment technology, specifically, to a waterproof membrane sand coating device and sand coating method. Background Technology

[0002] In the field of building waterproofing materials, products represented by SBS / APP modified bitumen waterproofing membranes are widely used. To improve the weather resistance, UV resistance, prevent sticking during storage, and enhance aesthetics, a layer of mineral particles (such as colored sand or basalt sand) is usually applied to the surface of the membrane. The key equipment for completing this process is a sand coating machine (also known as a sand spreading machine).

[0003] Currently, the sand coating technologies commonly used in the industry are mainly divided into two categories: gravity spreading and pneumatic sandblasting. Gravity spreading machines typically include a sand storage bin with slits or a row of nozzles at the bottom. The sand falls freely under gravity onto the surface of the coil material passing through at a uniform speed. This equipment is simple in structure and low in cost, but it has significant drawbacks. For example, the sand is easily unevenly distributed along the width of the coil material, forming obvious stripes or bands, severely affecting the consistency of product appearance and quality. This unevenness is even more pronounced when the production line speed fluctuates. The sand particles adhere solely to the adhesiveness of the asphalt surface, resulting in poor initial adhesion. During subsequent cooling, conveying, and winding processes, a large amount of sand particles will fall off, leading not only to insufficient sand on the product surface but also generating a large amount of "waste sand." The fallen sand requires a complex mechanical recycling system for collection and reuse. These systems occupy a large area, consume high energy, and easily generate dust during the recycling process, polluting the workshop environment.

[0004] Pneumatic sandblasting machines use compressed air to propel abrasive particles onto the surface of rolled materials. Compared to gravity-based sandblasting, they offer improved uniformity, but still don't solve the fundamental problem. Continuous compressed air supply is required, resulting in high energy consumption and significant operating noise. Factors such as airflow stability and abrasive moisture content affect the blasting effect, making adjustment and maintenance complex. Like gravity-based sandblasting, abrasive adhesion still passively relies on the adhesiveness of asphalt, failing to fundamentally solve the problem of abrasive shedding under high-speed production.

[0005] In addition, all of the aforementioned traditional equipment faces a common technological challenge: sensitivity to sand moisture. Once the sand becomes damp due to improper storage, it is very easy for "bridging" and blockage to occur in the silo, nozzle, or conveying channel, leading to production interruptions, requiring manual cleaning, and seriously affecting production efficiency and continuity. Summary of the Invention

[0006] The purpose of this invention is to provide a sand coating device and method for waterproof membranes, so as to solve the problems of existing sand coating devices in terms of uniformity, adhesion, material utilization, environmental friendliness and adaptability to high-speed production.

[0007] To solve the above problems, the present invention employs the following technical means: A waterproof membrane sand coating device, comprising: The sand storage mechanism has a conical bottom structure. A quantitative feeding mechanism is connected to the bottom surface of the sand storage mechanism and is used to quantitatively discharge the sand material in the sand storage mechanism. The ionization mechanism has a built-in sand-electrification mechanism for polarizing the passing sand. A high-voltage electrostatic spraying roller, used for electrostatic adsorption of sand, is located below the discharge section of the ionization mechanism; The sand material passing through the ionization mechanism carries a charge with a polarity opposite to that of the high-voltage electrostatic spraying roller; A high-voltage feeding roller is used to support and convey the roll material, allowing the roll material to pass horizontally below the high-voltage electrostatic spreading roller, and is connected to a DC high-voltage generator so that the roll material being conveyed carries a voltage with opposite polarity to that of the high-voltage electrostatic spreading roller.

[0008] Preferably, the sand storage mechanism is a sand storage box, and a vibration motor is installed on the outer wall of the conical structure of the sand storage mechanism.

[0009] Furthermore, the quantitative feeding mechanism includes a feed box connected to the unloading end of the sand storage mechanism. A horizontal feeding roller is installed inside the feed box. The rotation axis of the feeding roller is set horizontally. The external structure of the feeding roller has a quantitative groove extending along its axis.

[0010] Furthermore, the quantitative feeding mechanism and the ionization mechanism are flexibly connected by a rubber ring.

[0011] Furthermore, the ionization mechanism includes an ionization box connected to the quantitative feeding mechanism. An ionization plate is hinged inside the ionization box. The hinge part of the ionization plate is located directly below the feeding part of the quantitative feeding mechanism. The hinge part of the ionization plate is located at a high point, and the ionization plate is inclined downward. The end of the ionization plate and the inner wall of the ionization box serve as the discharge part of the ionization mechanism.

[0012] Furthermore, the ionization plate is an insulating plate, and a metal strip connected to a high-voltage power supply is embedded in the ionization plate to control the charge carried by the sand.

[0013] Furthermore, an electric telescopic rod is hinged to the bottom surface of the ionization plate, and the other end of the electric telescopic rod is hinged to the inner wall of the ionization box.

[0014] Furthermore, a cleaning mechanism is provided downstream of the rolled material. The cleaning mechanism includes a wind box with a horizontal partition installed inside. One end of the partition along the width direction of the rolled material is connected to the inner wall of the wind box through a gap, forming a communication channel. This allows the material passage chamber below the partition to communicate with the material collection chamber above the partition. The rolled material passes horizontally through the material passage chamber. On the side wall of the material passage chamber opposite to the communication channel, a blower head connected to a blower is horizontally arranged along the length direction of the rolled material. The air outlet of the blower head faces the side end of the rolled material. An exhaust pipe connected to the material collection chamber is provided on the top surface of the wind box.

[0015] The sand covering device of the present invention has the following beneficial effects during use: Utilizing the principle of electrostatic adsorption, sand particles are forced to be evenly distributed on the surface of a high-voltage electrostatic spreading roller, and then precisely projected onto the surface of the roll material. This method completely overcomes the inherent problems of longitudinal stripes and lateral unevenness in gravity spreading, achieving an extremely uniform sand coating effect across the entire width of the roll material, fundamentally guaranteeing the consistency of product appearance and quality.

[0016] Because the sand particles are accelerated in the electrostatic field, they are projected with a certain kinetic energy and embedded in the asphalt coating, which is still in a viscous state. Their adhesion is far greater than that of traditional methods that rely solely on the adhesive properties of asphalt. This significantly reduces sand particle shedding in subsequent processes.

[0017] The electrostatic sand coating process is rapid, and its efficiency is not affected by the increase in production line speed. It fundamentally solves the problem of the sharp decline in uniformity and adhesion when traditional equipment is running at high speeds.

[0018] In addition, based on the aforementioned sand coating device, this invention also provides a method for sand coating of waterproof membrane based on the aforementioned sand coating device. The sand to be coated falls from the sand storage mechanism into the quantitative feeding mechanism, and then falls into the ionization mechanism through the quantitative feeding mechanism. The sand rolls down along the inclined ionization plate and rubs against the ionization plate on the insulating surface. After the sand generates a charge, under the strong electrostatic field formed by the metal strip, the charge carried by the sand is rearranged into a charge with the opposite polarity to that of the high-voltage electrostatic spreading roller. Then the sand falls onto the high-voltage electrostatic spreading roller and is evenly adsorbed onto the high-voltage electrostatic spreading roller. As the high-voltage electrostatic spreading roller rotates, when the sand moves above the membrane material, the attractive force of the membrane material is used to evenly project the sand on the high-voltage electrostatic spreading roller onto the membrane material to complete the sand coating. As the membrane material moves, the sand that is not stably coated on the surface of the membrane material is blown off by the airflow in the cleaning mechanism, thereby separating it from the membrane material, and finally the stable sand coating of the membrane material is completed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention.

[0021] Figure 3 This is a cross-sectional structural diagram of the cleaning mechanism of the present invention.

[0022] Among them, 1-sand storage mechanism, 2-high-pressure electrostatic spreading roller, 3-high-pressure feeding roller, 4-wind box, 5-partition plate, 6-connecting channel, 7-material passage chamber, 8-material collection chamber, 9-blower head, 10-exhaust pipe, 11-vibration motor, 12-material passage box, 13-material conveying roller, 14-quantitative trough, 15-rubber ring, 16-ionization box, 17-ionization plate, 18-electric telescopic rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Please refer to Figures 1 to 3 As shown, a waterproof membrane sanding device includes: The sand storage mechanism 1 has a conical bottom structure; A quantitative feeding mechanism is connected to the bottom surface of the sand storage mechanism 1 and is used to quantitatively discharge the sand material in the sand storage mechanism 1. The ionization mechanism has a built-in sand-electrification mechanism for polarizing the passing sand. High-voltage electrostatic spraying roller 2, used for electrostatic adsorption of sand, is located below the discharge section of the ionization mechanism; The sand material passing through the ionization mechanism carries a charge with a polarity opposite to that of the high-voltage electrostatic spraying roller 2; The high-pressure feeding roller 3 is used to support the conveying of the roll material, so that the roll material passes horizontally below the high-pressure electrostatic spreading roller 2, and is connected to the DC high-voltage generator so that the conveying roll material carries a voltage with opposite polarity to the high-pressure electrostatic spreading roller 2. A cleaning mechanism is also provided downstream of the roll material. The cleaning mechanism includes a wind box 4, and a horizontal partition 5 is installed inside the wind box 4. A communication channel 6 is formed between one end of the partition 5 along the width direction of the roll material and the inner wall of the wind box 4, so that the material passage chamber 7 below the partition 5 and the material collection chamber 8 above the partition 5 are connected. The roll material passes horizontally through the material passage chamber 7. A blower head 9 connected to a blower is installed horizontally along the length direction of the roll material on the side wall of the material passage chamber 7 opposite to the communication channel 6. The air outlet end of the blower head 9 is directly opposite the side end of the roll material. An exhaust pipe 10 connected to the material collection chamber 8 is provided on the top surface of the wind box 4.

[0030] Furthermore, the sand storage mechanism 1 is a sand storage box, and a vibration motor 11 is installed on the outer wall of the conical structure of the sand storage mechanism 1.

[0031] This allows the use of the vibratory motor 11 to prevent bridging within the sand storage mechanism 1.

[0032] Furthermore, the quantitative feeding mechanism includes a feed box 12 that communicates with the unloading end of the sand storage mechanism 1. A horizontal feed roller 13 is installed inside the feed box 12. The rotation axis of the feed roller 13 is horizontally arranged, and the external structure of the feed roller 13 has a quantitative groove 14 extending along its axis.

[0033] Meanwhile, the quantitative feeding mechanism and the ionization mechanism are flexibly connected by a rubber ring 15.

[0034] Furthermore, the ionization mechanism includes an ionization box 16 connected to the quantitative feeding mechanism. An ionization plate 17 is hinged inside the ionization box 16. The hinge part of the ionization plate 17 is located directly below the feeding part of the quantitative feeding mechanism. The hinge part of the ionization plate 17 is located at a high point, and the ionization plate 17 is inclined downward. The end of the ionization plate 17 and the inner wall of the ionization box 16 serve as the discharge part of the ionization mechanism.

[0035] Meanwhile, the ionization plate 17 is an insulating plate, and the ionization plate 17 has a metal strip embedded in it that is connected to a high-voltage power supply, which is used to control the charge carried by the sand.

[0036] Furthermore, in order to adjust the angle of the ionization plate 17, an electric telescopic rod 18 is hinged to the bottom surface of the ionization plate 17, and the other end of the electric telescopic rod 18 is hinged to the inner wall of the ionization box 16.

[0037] In summary, to complete the electrostatic sand coating operation using the aforementioned sand coating device, the sand to be coated falls from the sand storage mechanism 1 into the quantitative feeding mechanism, and then through the quantitative feeding mechanism into the ionization mechanism. The sand rolls down along the inclined ionization plate 17 and rubs against the ionization plate 17 on the insulating surface. After the sand generates an electric charge, under the strong electrostatic field formed by the metal strip, the charge carried by the sand is rearranged into a charge with the opposite polarity to that of the high-voltage electrostatic spreading roller 2. Then the sand falls onto the high-voltage electrostatic spreading roller 2 and is evenly adsorbed onto it. As the high-voltage electrostatic spreading roller 2 rotates, when the sand moves above the roll material, the attractive force of the roll material is used to evenly project the sand on the high-voltage electrostatic spreading roller 2 onto the roll material to complete the sand coating. As the roll material moves, the sand that is not stably coated on the surface of the roll material is blown off by the airflow in the cleaning mechanism, thereby separating it from the roll material, and finally completing the stable sand coating of the roll material.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for covering waterproof membrane with sand, characterized in that, include: The sand storage mechanism (1) has a conical bottom structure; A quantitative feeding mechanism is connected to the bottom surface of the sand storage mechanism (1) and is used to quantitatively discharge the sand material in the sand storage mechanism (1); The ionization mechanism has a built-in sand-electrification mechanism for polarizing the passing sand. A high-voltage electrostatic spraying roller (2) is used for electrostatic adsorption of sand and is located below the discharge section of the ionization mechanism. The sand material passing through the ionization mechanism carries a charge with a polarity opposite to that of the high-voltage electrostatic spraying roller (2); High-pressure feeding roller (3) is used to support the conveying of roll material, so that the roll material passes horizontally below the high-pressure electrostatic spraying roller (2), and is connected to the DC high-voltage generator so that the roll material used for conveying carries a voltage with opposite polarity to the high-pressure electrostatic spraying roller (2). A cleaning mechanism is also provided along the downstream direction of the roll material. The cleaning mechanism includes a wind box (4). A horizontal partition (5) is installed inside the wind box (4). A connection channel (6) is provided between one end of the partition (5) along the width direction of the roll material and the inner wall of the wind box (4), so that the material passage chamber (7) below the partition (5) and the material collection chamber (8) above the partition (5) are connected. The roll material passes horizontally through the material passage chamber (7). A blower head (9) connected to a blower is installed horizontally along the length direction of the roll material on the side of the side wall of the material passage chamber (7) opposite to the connection channel (6). The air outlet end of the blower head (9) is facing the side end of the roll material. An exhaust pipe (10) connected to the material collection chamber (8) is provided on the top surface of the wind box (4).

2. The waterproof membrane sand-coating device according to claim 1, characterized in that, The sand storage mechanism (1) is a sand storage box, and a vibration motor (11) is installed on the outer wall of the conical structure of the sand storage mechanism (1).

3. The waterproof membrane sand-coating device according to claim 1, characterized in that, The quantitative feeding mechanism includes a feed box (12) connected to the unloading end of the sand storage mechanism (1). A horizontal feed roller (13) is installed inside the feed box (12). The rotation axis of the feed roller (13) is set horizontally. The external structure of the feed roller (13) has a quantitative groove (14) extending along its axis.

4. The waterproof membrane sand-coating device according to claim 1, characterized in that, The quantitative feeding mechanism and the ionization mechanism are flexibly connected by a rubber ring (15).

5. A waterproof membrane sand-coating device according to claim 1, characterized in that, The ionization mechanism includes an ionization box (16) connected to the quantitative feeding mechanism. An ionization plate (17) is hinged inside the ionization box (16). The hinge part of the ionization plate (17) is located directly below the feeding part of the quantitative feeding mechanism. The hinge part of the ionization plate (17) is located at a high point, and the ionization plate (17) is inclined downward. The end of the ionization plate (17) and the inner wall of the ionization box (16) serve as the discharge part of the ionization mechanism.

6. A waterproof membrane sand-coating device according to claim 5, characterized in that, The ionization plate (17) is an insulating plate, and the ionization plate (17) has a metal strip embedded in it that is connected to a high-voltage power supply, which is used to control the charge carried by the sand.

7. A waterproof membrane sand-coating device according to claim 5 or 6, characterized in that, An electric telescopic rod (18) is hinged to the bottom surface of the ionization plate (17), and the other end of the electric telescopic rod (18) is hinged to the inner wall of the ionization box (16).

8. A method for applying sand to a waterproof membrane based on the sand-coating device according to any one of claims 1 to 7, characterized in that, The sand to be covered falls from the sand storage mechanism (1) into the quantitative feeding mechanism, and then falls into the ionization mechanism through the quantitative feeding mechanism. The sand rolls down along the inclined ionization plate (17) and rubs against the ionization plate (17) on the insulating surface. After the sand generates a charge, under the strong electrostatic field formed by the metal strip, the charge carried by the sand is rearranged into a charge with the opposite polarity to that of the high-voltage electrostatic spreading roller (2). Then the sand falls onto the high-voltage electrostatic spreading roller (2) and is evenly adsorbed onto the high-voltage electrostatic spreading roller (2). As the high-voltage electrostatic spreading roller (2) rotates, when the sand moves above the roll material, the attractive force of the roll material is used to evenly project the sand on the high-voltage electrostatic spreading roller (2) onto the roll material to complete the sand covering. As the roll material moves, the sand that is not stably covered on the surface of the roll material is blown off by the airflow in the cleaning mechanism, thereby separating it from the roll material, and finally the stable roll sand covering is completed.

Images