A double roller reverse sand planting device and a sand planting method thereof

Abstract

The application discloses a double-roller reverse sand-planting device and a sand-planting method thereof, and relates to the field of coated abrasive tool manufacturing, in particular to a double-roller reverse sand-planting device and a sand-planting method thereof. The device comprises a sand box, a sand conveying roller, a base material and a guide roller. The sand outlet of the sand box is matched with the sand conveying roller. The sand box is provided with the guide roller for driving the base material to roll in the rolling direction of the sand conveying roller. A gap is arranged between the base material and the sand conveying roller. The guide roller and the sand box are located on the upper part of the horizontal radial plane of the sand conveying roller. The device has the advantages that: there is no sand particle falling process, the sand particles suspended in the air are greatly reduced, the operation environment is good, and waste is small. The gap between the guide roller and the sand conveying roller is adjustable, and the device is suitable for various abrasive particles, so that the sand-planting effect is optimal. The relative linear velocity between the guide roller and the sand conveying roller can be adjusted, the sand-feeding amount can be adjusted, and the sand amount adjustment is simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coated abrasive manufacturing, in particular to a double-roller reverse sanding device and a sanding method thereof. BACKGROUND

[0002] Currently, the sanding of coated abrasives generally adopts two methods: gravity sanding and electrostatic sanding.

[0003] Gravity sanding is to directly drop the sand in the sand box on the base material under the action of gravity after the sand is brought out by the sanding roller. The uniformity and sharpness of gravity sanding are relatively poor, and it is basically replaced by electrostatic sanding.

[0004] Electrostatic sanding is to uniformly lay the sand particles on the sand belt, and then sand under the action of electric field force. This method greatly improves the uniformity and sharpness of the abrasive on the coated abrasive, and is widely adopted.

[0005] The above two sanding methods are not suitable for fine particles, and the reasons are as follows: 1. The fine particles are small in size and light in weight, and are easy to adhere to the sanding roller; 2. Even if they fall off from the sanding roller, they will also float in the air, causing uneven sanding; 3. The kinetic energy of the fine particles given by the electrostatic field force is insufficient, and the particles are difficult to insert into the glue; 4. The fine particles are polarized for a long time in the air under the action of the electrostatic field, which easily causes uneven sanding. Due to the above reasons, the fine particles cannot be produced by the above two sanding methods.

[0006] Therefore, a device for sanding fine sand is urgently needed. SUMMARY

[0007] The purpose of the present application is to provide a double-roller reverse sanding device and a sanding method thereof to solve the above problems.

[0008] The technical solution adopted by the present application is as follows: a double-roller reverse sanding device, comprising a sand box, a sanding roller, a base material and a guide roller, the sanding outlet of the sand box is matched with the sanding roller, the sand box is provided with a guide roller for driving the base material to roll in the rolling direction of the sanding roller, a gap is provided between the base material and the sanding roller, and the guide roller and the sand box are located on the upper part of the horizontal radial plane of the sanding roller.

[0009] Further, the rotating direction of the guide roller is opposite to that of the sanding roller.

[0010] Further, the guide roller is provided with an adjusting mechanism capable of adjusting the distance between the guide roller and the sanding roller.

[0011] Further, the adjusting mechanism is an arc-shaped sliding groove and comprises a locking mechanism.

[0012] Further, the sanding roller is provided as a meshed roller.

[0013] Further, the surface of the screen roller comprises grooves for facilitating the removal of sand particles from the sand box.

[0014] Further, the sand box is provided with a sand knife for controlling the amount of sand.

[0015] Further, the sand box is provided with an adjusting mechanism on the side of the sand knife for adjusting the distance between the sand knife and the sand conveying roller.

[0016] Further, a sand planting method for a double-roller reverse sand planting device comprises the following steps:

[0017] S1: filling fine sand particles to be planted on the base material into the sand box;

[0018] S2: installing the base material to be planted with sand on the guide roller;

[0019] S3: starting the sand conveying roller and the guide roller, rotating the sand conveying roller to convey sand particles to the guide roller, and rotating the guide roller in the opposite direction to drive the base material to roll;

[0020] S4: starting the sand knife to release sand particles and starting to plant sand on the base material;

[0021] S5: observing the adsorption of sand particles on the base material, and if the sand particles are less, increasing the rotation speed of the sand conveying roller or decreasing the rotation speed of the guide roller, and if the sand particles are more and not well attached, decreasing the rotation speed of the sand conveying roller or increasing the rotation speed of the guide roller;

[0022] S6: adjusting the position of the guide roller to adjust the distance between the base material and the sand conveying roller according to different sand particle models to achieve the best sand planting effect.

[0023] Further, the amount of sand discharged from the sand box is adjusted by the position of the sand knife.

[0024] As described above, the present application has the following advantages:

[0025] 1. There is no process of sand particle falling, which greatly reduces the suspension of sand particles in the air, provides a good operating environment, and reduces waste;

[0026] 2. The gap between the guide roller and the sand conveying roller is adjustable, which is suitable for various fine particle sizes of abrasive materials, so that the sand planting effect is optimal;

[0027] 3. Adjusting the relative linear velocity between the guide roller and the sand conveying roller can adjust the amount of sand, and the sand amount adjustment is simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural diagram of the present application;

[0029] Figure 2 is a structural diagram of a gravity sand planting device;

[0030] Figure 3 This is a structural diagram of an electrostatic sand-planting device.

[0031] Markings in the diagram: 1-Sand box, 2-Sand conveying roller, 3-Substrate, 4-Guide roller, 5-Sand knife, 6-Sand grains. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] In this embodiment, as Figure 1 As shown, a double-roller reverse sand planting device includes a sand box 1, a sand conveying roller 2, a substrate 3, and a guide roller 4. The sand outlet of the sand box 1 is matched with the sand conveying roller 2. The sand box 1 is provided with a guide roller 4 in the rolling direction of the sand conveying roller 2 to drive the substrate 3 to roll. A gap is provided between the substrate 3 and the sand conveying roller 2. The guide roller 4 and the sand box 1 are both located on the upper part of the horizontal radial plane of the sand conveying roller 2. In this embodiment, the sand box 1 is located directly above the sand conveying roller 2, and the guide roller 4 is located 30° to the side of the rotation direction of the sand box 1.

[0035] The guide roller 4 and the sand conveying roller 2 maintain a certain gap and rotate in opposite directions. The rotation of the sand conveying roller 2 carries out the sand particles 6 in the sand box 1. Since the sand particles 6 have a certain initial velocity, the fine sand particles 6 will detach from the sand conveying roller 2 due to centrifugal force. At the substrate 3 between the guide roller 4 and the sand conveying roller 2, the sand particles 6 are carried away after contacting the adhesive on the substrate 3. As the substrate 3 and the sand conveying roller 2 continue to move, the sand particles 6 are continuously transferred to the substrate 3.

[0036] When sand particles 6 of equal or similar mass are centrifuged and thrown out, the distance they are thrown out will be approximately the same. During the sand planting process, the distance between the substrate 3 and the sand conveying roller 2 can be adjusted by controlling the guide roller 4, so that the size and mass of the sand particles 6 attached to the substrate 3 are consistent and the sand particles 6 are evenly distributed, so that the sand planting effect is optimal.

[0037] Furthermore, the guide roller 4 rotates in the opposite direction to the sand conveying roller 2. In this embodiment, the guide roller 4 rotates in the opposite direction to the sand conveying roller 2, which can drive the substrate 3 upward, so that the substrate 3 on which the sand particles 6 have just been attached can be further tightened under the action of gravity, preventing the sand particles 6 on the substrate 3 from falling off when rotating downward, thereby improving the quality of sand planting.

[0038] Furthermore, the guide roller 4 is provided with an adjustment mechanism that can adjust the distance between the guide roller 4 and the sand conveying roller 2; used to change the size of the gap between the substrate 3 and the sand conveying roller 2, thereby adjusting the adhesion of the sand particles 6 on the substrate 3.

[0039] Further, the adjusting mechanism is arranged as an arc-shaped sliding groove and comprises a locking mechanism; the guide roller 4 slides along the arc-shaped sliding groove, so as to adjust the distance between the guide roller 4 and the sand conveying roller 2, so that the sand grains 6 with equal or similar mass are thrown out with substantially the same distance when being thrown out by the centrifugal force. In the above sand planting process, the distance between the sand conveying roller 2 and the substrate 3 can be adjusted by controlling the guide roller 4, so that the size and mass of the sand grains 6 adhered to the substrate 3 remain consistent, the sand grains 6 are uniformly distributed, and the sand planting effect reaches the best. The locking mechanism can keep the guide roller 4 stable when rotating at high speed after adjusting the guide roller 4, and improve the sand planting quality.

[0040] Further, the sand conveying roller 2 is arranged as a meshed roller; the meshed roller can increase the adhesion of the surface of the sand conveying roller 2, and can more effectively guide the sand grains 6 out of the sand box 1, so as to ensure that a large number of fine sand grains 6 in the sand box 1 can be pressed on the surface of the sand conveying roller under the action of gravity, and the gap phenomenon caused by the friction between the fine sand grains 6 is eliminated, so as to ensure that the sand conveying roller 2 can uniformly take out the sand grains 6.

[0041] Further, the surface of the meshed roller comprises grooves for conveniently taking out the sand grains 6 from the sand box 1. The grooves can more effectively increase the adhesion of the sand grains 6 on the sand conveying roller 2, ensure the uniform distribution of the sand grains 6 on the sand conveying roller 2, and improve the sand planting quality.

[0042] Further, the sand outlet of the sand box 1 is provided with a sand knife 5 for controlling the amount of sand.

[0043] Further, the sand box 1 is provided with an adjusting mechanism on one side of the sand knife 5 for adjusting the distance between the sand knife 5 and the sand conveying roller 2.

[0044] Further, a sand planting method of the double-roller reverse sand planting device comprises the following steps:

[0045] S1: fine sand grains 6 to be planted on the substrate 3 are filled into the sand box 1; since the device is mainly used for planting fine sand grains 6, the required fine sand grains 6 are selected and put into the sand box 1 for waiting to be planted;

[0046] S2: the substrate 3 to be planted with sand is installed on the guide roller 4; the substrate 3 has an adhesive surface facing outward, so as to facilitate the subsequent sand planting step;

[0047] S3: the sand conveying roller 2 and the guide roller 4 are started, the sand conveying roller 2 rotates and conveys the sand grains 6 to the guide roller 4, and the guide roller 4 rotates in the opposite direction and drives the substrate 3 to roll;

[0048] S4: the sand knife 5 is started to release the sand grains 6 and start to plant the sand grains 6 on the substrate 3;

[0049] S5: observe the adsorption of the substrate 3 to the sand particles 6, if the sand particles 6 are less, the speed of the sand conveying roller 2 can be increased or the speed of the guide roller 4 can be reduced, if the sand particles 6 are more and not well attached, the speed of the sand conveying roller 2 can be reduced or the speed of the guide roller 4 can be increased; the guide roller 4 and the sand conveying roller 2 keep a certain gap and the rotation directions are opposite, the sand conveying roller 2 rotates to take out the sand particles 6 in the sand box 1, because the sand particles 6 have a certain initial speed, the fine sand particles 6 will be separated from the sand conveying roller 2 due to the centrifugal force, at the substrate 3 between the guide roller 4 and the sand conveying roller 2, the sand particles 6 are taken away after contacting the adhesive on the substrate 3, with the continuous movement of the substrate 3 and the sand conveying roller 2, the sand particles 6 are continuously transferred to the substrate 3;

[0050] The above device quality equal or similar sand particles 6 are centrifuged out, the distance of the centrifuged out will be roughly the same, in the above sand planting process, the distance between the substrate 3 and the sand conveying roller 2 can be adjusted by controlling the guide roller 4, so that the size and quality of the sand particles 6 attached to the substrate 3 remain consistent, the sand particles 6 are evenly distributed, and the sand planting effect reaches the best;

[0051] S6: according to different sand particle 6 models, the position of the guide roller 4 is adjusted to adjust the distance between the substrate 3 and the sand conveying roller 2, so as to achieve the best sand planting effect.

[0052] Further, the sand output of the sand box 1 can be adjusted by the position of the sand cutter 5; the sand output is adjusted by the size of the opening and closing degree of the sand cutter 5.

[0053] The above only describes the preferred embodiments of the present application and does not limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A twin roll reverse sand plant characterized by: The sand box (1), sand conveying roller (2), base material (3) and guide roller (4), the sand outlet of the sand box (1) matches the sand conveying roller (2), the sand box (1) is provided with the guide roller (4) driving the base material (3) to roll in the rolling direction of the sand conveying roller (2), the gap is provided between the base material (3) and the sand conveying roller (2), the sand box (1) and the guide roller (4) are located on the upper part of the horizontal radial plane of the sand conveying roller (2), the sand box (1) is used for storing sand particles (6), the sand particles (6) in the sand box (1) are taken out by the rotation of the sand conveying roller (2), the sand particles (6) have initial velocity, the centrifugal force makes the sand particles (6) separate from the sand conveying roller (2) and continuously adhere to the base material (3).

2. A two-roll reverse sand plant as claimed in claim 1, characterized in that: The guide roller (4) is opposite to the sand conveying roller (2) in the rotation direction.

3. A two-roll reverse sand plant as claimed in claim 1, wherein: The guide roller (4) is provided with an adjusting mechanism capable of adjusting the distance between the guide roller (4) and the sand conveying roller (2).

4. A twin roll reverse sand plant as claimed in claim 3 wherein: The adjusting mechanism is arranged as an arc-shaped sliding groove and comprises a locking mechanism.

5. A two-roll reverse sand plant as claimed in claim 1, wherein: The sand conveying roller (2) is arranged as a screen roller.

6. A twin roll reverse sand plant as claimed in claim 5 wherein: The surface of the screen roller comprises grooves facilitating the taking out of the sand particles (6) from the sand box (1).

7. A two-roll reverse sand plant as claimed in claim 1, wherein: The sand outlet of the sand box (1) is provided with a sand knife (5) controlling the sand output.

8. A two-roll reverse sand plant as claimed in claim 7, characterized in that: The sand box (1) is provided with an adjusting mechanism on the side of the sand knife (5) for adjusting the distance between the sand knife (5) and the sand conveying roller (2).

9. A sand-planting method of a double-roller reverse sand-planting device, applied to the double-roller reverse sand-planting device according to any one of claims 1-8, characterized in that: The method comprises the following steps: S1: filling the sand box (1) with fine sand particles (6) to be planted on the base material (3); S2: installing the sand-planting base material (3) on the guide roller (4); S3: starting the sand conveying roller (2) and the guide roller (4), the sand conveying roller (2) rotates to convey the sand particles (6) to the guide roller (4), the guide roller (4) rotates in the opposite direction and drives the base material (3) to roll; S4: starting the sand knife (5) to release the sand particles (6) and starting to plant the sand particles (6) on the base material (3); S5: observing the adsorption of the base material (3) to the sand particles (6), if the sand particles (6) are less, the rotation speed of the sand conveying roller (2) can be increased or the rotation speed of the guide roller (4) can be decreased, if the sand particles (6) are more and not well adhered, the rotation speed of the sand conveying roller (2) can be decreased or the rotation speed of the guide roller (4) can be increased; S6: according to different sand particle (6) models, the position of the guide roller (4) is adjusted to adjust the distance between the base material (3) and the sand conveying roller (2) to achieve the best sand planting effect.

10. The method of claim 9, wherein the method is a method of sanding with a two-roller reverse sanding device, characterized by: The sand output of the sand box (1) is adjusted by the position of the sand knife (5).

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