Abrasive paper production coating device

Abstract

The utility model relates to an abrasive paper production coating device which comprises an operation table, a coating assembly and a material storage assembly, an abrasive paper operation channel is defined on the operation table, the coating assembly comprises two coating rollers rotationally installed on the operation table, the two coating rollers are sequentially arranged in the length direction of the abrasive paper operation channel in a spaced mode, and the distance between the two coating rollers is adjustable. The axial direction of the coating rollers is parallel to the width direction of the abrasive paper operation channel, and the two coating rollers are arranged above the abrasive paper operation channel at intervals. The material storage assembly is arranged above the coating assembly, a discharging part is arranged at the bottom of the material storage assembly, and the discharging part is arranged corresponding to the interval position of the two coating rollers; by opening the discharging part, glue firstly flows through the interval of the two coating rollers under the action of gravity and then downwards flows to the abrasive paper base material, and the coating process is realized by matching with the movement of the abrasive paper along the running channel, so that the base material is not in direct contact with the coating rollers, and the problems of wiredrawing, scratches, roller marks and the like on the glue surface of the base material in the coating process are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coated abrasive tool production equipment, in particular to a sandpaper production coating device. Background Art

[0002] Coated abrasives are abrasives that use adhesives to adhere abrasives to a flexible substrate, also known as flexible abrasives. They are widely used in the grinding, polishing and grinding of metal materials, wood, ceramics, plastics, leather, rubber, and non-metallic materials such as paint putty. At present, traditional sandpaper coating machines for producing sandpaper generally use two-roller coating, three-roller coating, and scraper coating. During the coating process, the adhesive surface of the sandpaper is prone to problems such as drawing, scratches, and roller marks. Utility Model Content

[0003] The main purpose of the utility model is to provide a sandpaper production coating device, aiming to solve the problems of wire drawing, scratches, roller marks and the like on the rubber surface of the sandpaper during the coating process of the traditional sandpaper coating machine.

[0004] To achieve the above-mentioned purpose, the utility model proposes a sandpaper production coating device, comprising an operating table, a coating assembly and a storage assembly, wherein a sandpaper running channel is defined on the operating table, and the coating assembly comprises two coating rollers rotatably mounted on the operating table, the two coating rollers are arranged in sequence along the length direction of the sandpaper running channel and the spacing between them is adjustable, the axes of the two coating rollers are parallel to the width direction of the sandpaper running channel, and the two coating rollers are both spaced apart above the sandpaper running channel; the storage assembly is arranged above the coating assembly, and a discharge portion is provided at the bottom of the storage assembly, and the discharge portion is arranged corresponding to the spacing between the two coating rollers.

[0005] Optionally, the two coating rollers are rotatably mounted on the operating table via bearing seats, an elastic member is provided between two adjacent bearing seats along the length direction of the sandpaper running channel, and an adjustment mechanism is provided on the operating table for moving the two coating rollers closer to or farther away from each other.

[0006] Optionally, the adjustment mechanism includes a plurality of adjustment parts movably arranged on the operating table along the length direction of the sandpaper running channel, and each bearing seat is equipped with one adjustment part.

[0007] Optionally, the adjusting portion includes a screw rod, and the screw rod is rotatably mounted on the operating table.

[0008] Optionally, a material receiving portion is further included, and the material receiving portion is arranged below the sandpaper running channel.

[0009] Optionally, the surface roughness of each coating roller is Ra≤0.8.

[0010] Optionally, the coating assembly further comprises a plurality of sealing covers, which are respectively arranged at two axial ends of each coating roller.

[0011] Optionally, the discharge portion includes a discharge port or a discharge pipe.

[0012] Optionally, a solenoid valve is provided at the discharge port or on the discharge pipe.

[0013] The utility model has at least the following beneficial effects:

[0014] In the utility model, the discharge port is arranged corresponding to the interval between the two coating rollers, and the sandpaper running channel is arranged below the two coating rollers. When the sandpaper coating process is carried out, after the discharge portion is opened, the glue will flow through the interval between the two coating rollers under the action of gravity, so that the glue that forms a curtain wall shape after flowing out of the interval continues to flow downward to the sandpaper substrate in the sandpaper running channel, and cooperates with the sandpaper substrate to move along the length direction of the sandpaper running channel, thereby realizing the coating process of the sandpaper substrate. In this way, the sandpaper substrate does not need to directly contact the two coating rollers, so that the glue surface of the substrate will not have problems such as drawing, scratches, roller marks, etc. during the coating process.

[0015] Secondly, the two coating rollers are arranged in sequence along the length direction of the sandpaper running channel and the distance between them is adjustable. By adjusting the distance between the two coating rollers, the flow rate of glue flowing through the interval is changed. In this way, the coating accuracy can be improved and it can also be suitable for the production of sandpaper of different models and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a sandpaper production coating device provided in an embodiment of the utility model.

[0018] Description of reference numerals:

[0019] 1-operating table; 2-coating assembly; 21-coating roller; 3-material storage assembly; 31-discharging part; 4-bearing seat; 5-elastic member; 6-adjusting mechanism; 61-adjusting part; 611-screw; 7-material receiving part; 8-sealing cover; 9-sandpaper substrate; 100-sandpaper production coating device. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0023] At present, traditional sandpaper coating machines for producing sandpaper generally adopt two-roller coating, three-roller coating and scraper coating methods for coating. During the coating process, the rubber surface of the sandpaper is prone to problems such as drawing, scratches and roller marks.

[0024] In view of this, the utility model provides a sandpaper production coating device. Figure 1 A specific embodiment of the sandpaper production coating device provided by the utility model.

[0025] like Figure 1As shown, an embodiment of the utility model provides a sandpaper production coating device 100, including an operating table 1, a coating component 2 and a storage component 3, wherein a sandpaper running channel is defined on the operating table, the coating component 2 includes two coating rollers 21 rotatably mounted on the operating table, the two coating rollers 2 are arranged in sequence along the length direction of the sandpaper running channel and the spacing therebetween is adjustable, the axial directions of the two coating rollers 21 are parallel to the width direction of the sandpaper running channel, and the two coating rollers 21 are both spaced apart above the sandpaper running channel; the storage component 3 is arranged above the coating component, and a discharge portion 31 is provided at the bottom of the storage component, and the discharge portion is arranged corresponding to the spacing between the two coating rollers.

[0026] In the embodiment provided by the utility model, a tensioning roller and a conveying roller are respectively arranged before and after the operating table to form the sandpaper running channel for conveying sandpaper for coating process, wherein the conveying roller can also be replaced by a suction box, and the storage component 3 stores the configured adhesive (epoxy resin, alkyd resin, acrylate, etc.) required for sandpaper production. In the process of producing sandpaper, the sandpaper substrate 9 to be coated is first placed in the sandpaper running channel, and then the two coating rollers 21 are rotated, and the discharge part 31 is opened, so that the adhesive flows to the gap between the two coating rollers 21 under the action of gravity. During the rotation of the two coating rollers 21, the adhesive will be compressed into a curtain wall shape and flow downward to the substrate to be coated. The coated sandpaper substrate 9 is then coordinated with the sandpaper running channel to transmit the sandpaper to be coated to move along the length direction of the sandpaper running channel, so that the adhesive can cover the entire sandpaper substrate 9 to be coated to complete the coating process. During the entire coating process, the sandpaper substrate 9 does not need to directly contact the two coating rollers 21, thereby avoiding problems such as drawing, scratches, and roller marks on the adhesive surface of the substrate during the coating process. In this embodiment, the distance between the sandpaper running channel and the two coating rollers 21 can be 15cm-25cm, preferably 20cm. The direction of rotation of the two coating rollers is not specifically limited. Preferably, along the running direction of the sandpaper, the front coating roller rotates clockwise, and the rear coating roller rotates counterclockwise.

[0027] In addition, because the two coating rollers 21 are arranged in sequence along the length direction of the sandpaper running channel and the distance between them is adjustable, the flow rate of the adhesive flowing through the interval can be changed by adjusting the distance between the two coating rollers 21, so as to control the coating accuracy, and also enable the sandpaper production coating device 100 to adapt to the production of sandpapers of different specifications or types. At the same time, after improving the coating accuracy, the yield rate of sandpaper production can also be improved, the cost can be reduced, and the production efficiency can be improved. In this embodiment, the distance between the two coating rollers 21 is generally 0.2mm-1mm, which is selected according to the product to be produced. It can be understood that in the present utility model, the method of driving the coating roller 21 to rotate is not specifically limited, and can be motor driven, cylinder driven, hydraulic cylinder driven, etc.; the storage component 3 is also not specifically limited, and can be a storage hopper or a storage pot, etc.

[0028] Please note that Figure 1 The specific method of adjusting the distance between the two coating rollers 21 in the utility model is not limited. For example, in one embodiment, both ends of the two coating rollers 21 are rotatably mounted on the operating table through the bearing seat 4. An elastic member 5 is provided between the two adjacent bearing seats 4 along the length direction of the sandpaper running channel. The operating table is provided with an adjustment mechanism 6 for making the two coating rollers 21 approach or move away from each other. It is worth mentioning that when the two coating rollers 21 are adjusted to approach each other through the adjustment mechanism 6, the elastic member 5 will be compressed, and the elastic member 5 will generate a reverse elastic force due to the compression of the elastic member 5, which can avoid the coating roller 21 being difficult to stop at the target position under the action of a large inertia due to the adjustment of the speed of the two coating rollers 21 moving too fast, thereby affecting the accuracy of the distance adjustment. When the two coating rollers 21 are adjusted to move away from each other through the adjustment mechanism 6, the pressure on the elastic member 5 is reduced, and rebound is generated, which can help to increase the distance between the two coating rollers 21. It should be noted that the elastic member 5 is not specifically limited and can be a spring, a bellows, etc.

[0029] Specifically, the adjustment mechanism 6 includes a plurality of adjustment parts 61 movably arranged on the operating table along the length direction of the sandpaper running channel, and each bearing seat 4 is provided with an adjustment part 61. When the two coating rollers are adjusted to approach each other by the adjustment part 61, each adjustment part 61 will move toward the corresponding bearing seat 4 along the length direction of the sandpaper running channel, and push the corresponding bearing seat 4 after contact to drive the two coating rollers 21 to move closer to each other. When the two coating rollers 21 are adjusted to move away from each other by the adjustment part 61, each adjustment part 61 will move away from the corresponding bearing seat 4 along the length direction of the sandpaper running channel. At this time, each adjustment part 61 no longer provides thrust to each bearing seat 4, and under the action of the rebound of the elastic member 5, the two coating rollers 21 move away from each other.

[0030] Furthermore, the adjusting portion 61 includes a screw 611, and the screw 611 is rotatably installed on the operating table, so that the screw 611 can be rotated to make the screw 611 reciprocate along the length direction of the sandpaper running channel, thereby adjusting the two coating rollers 21 to move closer to or away from each other. By adopting the screw 611, the accuracy of its translation can be adjusted by the rotation angle, and there is good distance adjustment accuracy, so the coating accuracy can be further improved. It should be noted that in this embodiment, a plurality of the screws are arranged on both sides of the two coating rollers 21 in the operating table 1, and when the screws 611 corresponding to the two adjacent bearing seats 4 on the same side are rotated, the two screws 611 rotate in opposite directions.

[0031] In the sandpaper coating production process, it is often necessary to debug the equipment before starting coating. During the debugging process, the sandpaper substrate 9 will not be placed in the sandpaper running channel, but the entire sandpaper production coating device 100 will be started first, that is, the two coating rollers 21 are rotated and the discharging part 31 is opened to discharge glue, and then the spacing between the two coating rollers 21 is adjusted to obtain a suitable flow rate of glue outflow, and then the sandpaper substrate 9 will be put in for the coating process. In the debugging equipment, excess adhesive will flow down, which is easy to damage the equipment and pollute the environment. Therefore, in one embodiment, it also includes a receiving part 7, which is arranged below the coating component, which can not only be used to catch the adhesive that falls during normal coating, but also can catch a large amount of adhesive that flows down before startup debugging for recycling, thereby further saving production costs.

[0032] Specifically, in one embodiment, the surface roughness of each coating roller 21 is Ra≤0.8, which has good wear resistance and corrosion resistance, and can further improve the coating accuracy.

[0033] Specifically, in order to limit the adhesive flowing down from the storage component 3 to the coating area, in one embodiment, the coating component 2 also includes a plurality of sealing covers 8, which are respectively arranged at the two axial ends of each of the coating rollers 21. In this way, the glue can be confined to the coating area and will not continue to flow out in the forward and backward directions, damaging the equipment and polluting the environment.

[0034] It can be understood that the specific form of the discharge portion 31 is not specifically limited, and it can be a discharge port or a discharge pipe, etc., and can also include a cover body, a valve, etc. arranged on the discharge port or the discharge pipe. In one embodiment, a solenoid valve is provided at the discharge port or on the discharge pipe to adjust the discharge flow rate, thereby controlling the discharge flow rate from the source and further improving the accuracy of the subsequent coating process.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sandpaper production coating device, comprising an operating table, wherein a sandpaper running channel is defined on the operating table, characterized in that: Also includes: A coating assembly, comprising two coating rollers rotatably mounted on the operating table, the two coating rollers being arranged in sequence along the length direction of the sandpaper running channel and the spacing between the two coating rollers being adjustable, the axes of the two coating rollers being parallel to the width direction of the sandpaper running channel, and the two coating rollers being spaced above the sandpaper running channel; and, A material storage component is arranged above the coating component, and a material discharge portion is arranged at the bottom of the material storage component, and the material discharge portion is arranged corresponding to the interval between the two coating rollers.

2. The sandpaper production coating device according to claim 1, characterized in that: The two coating rollers are rotatably mounted on the operating table through bearing seats, an elastic member is arranged between two adjacent bearing seats along the length direction of the sandpaper running channel, and an adjusting mechanism for making the two coating rollers move closer to or farther away from each other is arranged on the operating table.

3. The sandpaper production coating device according to claim 2, characterized in that: The adjustment mechanism comprises a plurality of adjustment parts movably arranged on the operating table along the length direction of the sandpaper running channel, and each bearing seat is equipped with one adjustment part.

4. The sandpaper production coating device according to claim 3, characterized in that: The adjusting part comprises a screw rod, and the screw rod is rotatably mounted on the operating table.

5. The sandpaper production coating device according to claim 1, characterized in that: It also includes a material receiving portion, which is arranged below the sandpaper running channel.

6. The sandpaper production coating device according to claim 1, characterized in that: The surface roughness of each coating roller is Ra≤0.

8.

7. The sandpaper production coating device according to claim 1, characterized in that: The coating assembly also includes a plurality of sealing covers, which are respectively arranged at two ends of the axial direction of each coating roller.

8. The sandpaper production coating device according to claim 1, characterized in that: The discharging portion includes a discharging port or a discharging pipe.

9. The sandpaper production coating device according to claim 8, characterized in that: A solenoid valve is provided at the discharge port or on the discharge pipe.

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