A multipurpose cutting sheet and a method of manufacturing the same

Abstract

The present application belongs to abrasive material technical field, and relates to a multipurpose cutting sheet and a preparation method thereof.The cutting sheet comprises a mesh layer, a cutting surface layer and a mesh layer in sequence.The preparation raw material of the cutting surface layer comprises the following components by weight: 5-19 parts of filler, 4-8 parts of phenolic resin solution, 9-16 parts of phenolic resin powder and 57-82 parts of abrasive.The abrasive is pretreated before being mixed with other raw materials.The pretreatment steps comprise: placing the abrasive in a hydrogenated rosin resin anhydrous ethanol solution, ultrasonic oscillation for 30-60 min, and taking out the abrasive for drying.The cutting sheet prepared by the present application has multipurpose, can cut metal materials and non-metal materials at the same time, and has excellent cutting ratio and fast cutting efficiency.

Description

Technical Field

[0001] This invention belongs to the field of abrasive material technology and relates to a multi-purpose cutting disc and its preparation method. Background Technology

[0002] Resin cutting discs are one of the most common types of abrasive products. They use resin as a binder to bond loose abrasive grains together, solidifying them into a thin disc of a specific shape. These cutting discs possess high tensile, impact, and bending strength and are widely used for cutting and separating various metal and non-metal materials. Because different metal and non-metal materials have different material properties, the cutting discs used for cutting and separating them also differ. However, home renovation materials include various types such as ordinary steel, stainless steel, aluminum alloy, PVC pipes, tiles, and red bricks. Since the renovation process involves switching between these different materials, and each material requires a specific cutting disc, home renovation workers often have to repeatedly change discs to ensure smooth cutting, leading to inefficiency. Some home renovation workers, to avoid the hassle, simply don't change discs when faced with different materials, using discs designed for metal materials to cut PVC pipes, tiles, red bricks, and other non-metallic materials. This results in cutting difficulties, material overheating and damage, and even safety accidents such as disc breakage. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-purpose cutting disc and its preparation method.

[0004] One objective of this invention is achieved through the following technical solution:

[0005] A multi-purpose cutting disc, comprising a mesh layer, a cutting surface layer, and another mesh layer, wherein the raw materials for preparing the cutting surface layer comprise the following components in parts by weight:

[0006] 5-19 parts filler, 4-8 parts phenolic resin liquid, 9-16 parts phenolic resin powder, and 57-82 parts abrasive.

[0007] Preferably, the filler is potassium cryolite and barite. The combined use of potassium cryolite and barite can effectively improve the strength of the cutting disc. Potassium cryolite can also promote the shedding of abrasive particles during the grinding process, preventing the cutting disc from clogging.

[0008] Preferably, in the raw materials for preparing the cutting surface layer, the potassium cryolite comprises 3 to 14 parts by weight, and the barite comprises 2 to 5 parts by weight. Mixing potassium cryolite and barite in appropriate weights is beneficial for improving the cutting performance of the cutting disc.

[0009] Preferably, the filler is pretreated before being mixed with other raw materials. The pretreatment steps include: dispersing the filler in anhydrous ethanol, then adding glycerol and a coupling agent, ultrasonically vibrating for 20-60 minutes, and then taking out the filler for drying.

[0010] Pre-treating the filler through the above steps can effectively improve the bonding strength between the filler and the phenolic resin binder. The addition of glycerol is beneficial for improving the bonding strength and amount of coupling agent bound to the filler surface.

[0011] Preferably, the glycerol added is 1-20 wt% of anhydrous ethanol, and the mass ratio of the coupling agent to the filler is 0.3:1-1.5:1. More preferably, the glycerol added is 2-10 wt% of anhydrous ethanol, and the mass ratio of the coupling agent to the filler is 0.5:1-1.1:1.

[0012] Preferably, the coupling agent is a silane coupling agent, such as KH-560, KH-550, etc.

[0013] Preferably, the solid content of the phenolic resin liquid is 55-85%.

[0014] Preferably, the abrasive comprises the following components by mass percentage:

[0015] The composition is 50-70% iridium-plated brown fused alumina, 10-20% white fused alumina, and 20-30% green silicon carbide.

[0016] Adding an appropriate amount of green silicon carbide to iridium-plated brown fused alumina abrasive ensures the cutting disc's self-sharpening properties are maintained due to the brittle nature of the green silicon carbide. This self-sharpening property, caused by the increased working pressure, leads to the cutting disc's brittleness and improved cutting performance. Furthermore, the different particle shapes of iridium-plated brown fused alumina and green silicon carbide increase the contact area between the particles and the binder, thus enhancing the bonding strength between the binder and the abrasive particles and effectively improving the cutting disc's strength and processing efficiency. Iridium-plated brown fused alumina ensures the cutting disc's durability during use, white fused alumina ensures its sharpness when cutting ordinary steel, stainless steel, and aluminum alloys, and green silicon carbide ensures its sharpness when cutting aluminum alloys, stainless steel, ceramic tiles, and PVC pipes.

[0017] Preferably, the abrasive is pretreated before being mixed with other raw materials. The pretreatment steps include: placing the abrasive in an anhydrous ethanol solution of hydrogenated rosin resin, ultrasonically vibrating for 30-60 minutes, and then removing the abrasive and drying it.

[0018] The abrasive is pretreated and its surface is coated with hydrogenated rosin resin, which helps to improve the bonding strength between the abrasive and the phenolic resin binder.

[0019] Preferably, the anhydrous ethanol solution of hydrogenated rosin resin is formed by dissolving hydrogenated rosin resin in anhydrous ethanol, and the concentration of hydrogenated rosin resin is 10-30 w / w.

[0020] Preferably, the mass ratio of the anhydrous ethanol solution of hydrogenated rosin resin to the abrasive is 10:1 to 2:1.

[0021] Preferably, the particle size range of the filler and abrasive is 20–80 mesh.

[0022] Preferably, the thickness of the cutting blade is 0.5 to 5 mm.

[0023] Preferably, the mesh layer is an alkali-free glass fiber reinforced mesh.

[0024] Another objective of this invention is achieved through the following technical solution:

[0025] A method for preparing a multi-purpose cutting disc includes the following steps:

[0026] S1. Weigh the raw materials for preparing the cutting surface layer, pre-treat the filler and the abrasive, and then mix the raw materials together for later use.

[0027] S2. Preheat the mold to 40-50℃, place a layer of wire mesh, use a heating device to soften the wire mesh, and press the mesh.

[0028] S3. Pour the raw materials mixed in step S1 onto the mesh sheet of step S2 and spread them out.

[0029] S4. Place another layer of mesh, then add the perforated ring, press and shape it, and then harden and cool it to obtain the corresponding size cutting disc.

[0030] Preferably, the pretreatment step includes: dispersing the filler in anhydrous ethanol, then adding glycerol and a coupling agent, ultrasonically vibrating for 20-60 minutes, and then removing the filler for drying.

[0031] Preferably, the pretreatment step includes: placing the abrasive in an anhydrous ethanol solution of hydrogenated rosin resin, ultrasonically vibrating for 30-60 minutes, and then removing the abrasive and drying it.

[0032] Preferably, the hardening step includes: holding at 45-60℃ for 12-36 hours, then raising the temperature to 90-110℃ and holding for 1-5 hours after 4-6 hours, then holding at 106-117℃ for 2-6 hours, then holding at 117-126℃ for 1-3 hours, then holding at 126-138℃ for 1-2 hours, then holding at 138-146℃ for 2-2.5 hours, and finally holding at 175-188℃ for 5-6 hours.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The filler used in the cutting disc of the present invention is potassium cryolite and barite. The combined use of the two can effectively improve the strength of the cutting disc. Potassium cryolite can also promote the shedding of abrasive particles during the grinding process and prevent the cutting disc from clogging.

[0035] 2. The filler of the present invention is treated with a mixture of anhydrous ethanol, glycerol and coupling agent, which can effectively improve the bonding strength between the filler and the phenolic resin binder.

[0036] 3. The abrasive of the present invention is preferably iridium-plated brown fused alumina, white fused alumina and green silicon carbide. Adding an appropriate amount of green silicon carbide to the abrasive ensures the sharpness of the cutting disc when cutting aluminum alloy, stainless steel, ceramic tile and PVC pipe.

[0037] 4. The abrasive of the present invention is pretreated before being mixed with other raw materials. The pretreatment steps include: placing the abrasive in an anhydrous ethanol solution of hydrogenated rosin resin, ultrasonically vibrating for 30 to 60 minutes, and then taking out the abrasive and drying it. After pretreatment, the surface of the abrasive is bonded with hydrogenated rosin resin, which is beneficial to improving the bonding strength between the abrasive and the phenolic resin binder.

[0038] 5. The cutting disc prepared by this invention has multiple uses and can cut both metallic and non-metallic materials simultaneously, exhibiting excellent cutting ratio and fast cutting efficiency. Detailed Implementation

[0039] The technical solution of the present invention will be further described and illustrated below through specific embodiments. It should be understood that the specific embodiments described herein are only for the purpose of helping to understand the present invention and are not intended to limit the present invention. Unless otherwise specified, the raw materials used in the embodiments of the present invention are all commonly used raw materials in the art, and the methods used in the embodiments are all conventional methods in the art.

[0040] In the following examples and comparative examples, the particle size range of the fillers and abrasives used is 20 to 80 mesh.

[0041] The iridium-plated brown fused alumina is BC-BFA-HCC produced by Shandong Panshi Corundum Co., Ltd.

[0042] The phenolic resin solution was purchased from Zhengzhou Jinlei Resin Co., Ltd., with a solid content of 75%.

[0043] Phenolic resin powder was purchased from Zhengzhou Jinlei Resin Co., Ltd.

[0044] The hydrogenated rosin resin is Arakawa Chemical's KR610;

[0045] The white fused alumina and green silicon carbide were purchased from Suzhou Jinxing Abrasive Co., Ltd.

[0046] Example 1

[0047] The cutting disc in Example 1 comprises, in sequence, an alkali-free glass fiber reinforced mesh, a cutting surface layer, and an alkali-free glass fiber reinforced mesh. The raw materials for preparing the cutting surface layer include: 6 parts potassium cryolite, 4 parts barite, 4 parts phenolic resin liquid (solid content of 75%), 10 parts phenolic resin powder, 46 parts iridium-plated brown corundum, 14 parts white corundum, and 16 parts green silicon carbide.

[0048] The cutting disc is prepared by the following steps:

[0049] S1. Weigh the raw materials for the cutting surface layer according to the above weight proportions. Pre-treat the filler: Disperse 6 parts potassium cryolite and 4 parts barite in 50 parts anhydrous ethanol, then add 2 parts glycerol and 13 parts KH-560, ultrasonically vibrate for 30 minutes, then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 46 parts iridium-plated brown corundum, 14 parts white corundum and 16 parts green silicon carbide in an anhydrous ethanol solution (25w / w%) of 350 parts hydrogenated rosin resin, ultrasonically vibrate for 30 minutes, then remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use.

[0050] S2. Preheat the mold to 45°C, place a layer of alkali-free glass fiber reinforced mesh, soften the alkali-free glass fiber reinforced mesh with a heating device (100°C, 2s), and press the mesh.

[0051] S3. Pour the raw materials mixed in step S1 onto the mesh sheet of step S2 and spread them out.

[0052] S4. Add another layer of alkali-free glass fiber reinforced mesh, then add the perforated ring, and press to form (preheat the mold to 50℃, pressure 25MPa). After hardening and cooling, the cutting disc is obtained. The specific hardening steps are as follows: first, dehumidify by holding at 55℃ for 24 hours; then, slowly raise the temperature to 100℃ and hold for 3 hours; then, hold at 110℃ for 4 hours; then, hold at 120℃ for 2 hours; then, hold at 130℃ for 1.5 hours; then, hold at 140℃ for 2 hours; and finally, hold at 180℃ for 6 hours. The prepared cutting disc specifications are: APB107x1.2x16, outer diameter 107mm, hole diameter 16mm, thickness 1.2mm.

[0053] Example 2

[0054] The cutting disc in Example 2 comprises, in sequence, an alkali-free glass fiber reinforced mesh, a cutting surface layer, and an alkali-free glass fiber reinforced mesh. The raw materials for preparing the cutting surface layer include: 8 parts potassium cryolite, 3 parts barite, 6 parts phenolic resin liquid (solid content of 75%), 16 parts phenolic resin powder, 38 parts iridium-plated brown corundum, 12 parts white corundum, and 17 parts green silicon carbide.

[0055] The cutting disc is prepared by the following steps:

[0056] S1. Weigh the raw materials for the cutting surface layer according to the above weight proportions. Pre-treat the filler: Disperse 8 parts potassium cryolite and 3 parts barite in 60 parts anhydrous ethanol, then add 3 parts glycerol and 15 parts KH-550, ultrasonically vibrate for 40 minutes, then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 38 parts iridium-plated brown corundum, 12 parts white corundum and 17 parts green silicon carbide in an anhydrous ethanol solution (20w / w%) of 400 parts hydrogenated rosin resin, ultrasonically vibrate for 40 minutes, then remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use.

[0057] S2. Preheat the mold to 42°C, place a layer of alkali-free glass fiber reinforced mesh, soften the alkali-free glass fiber reinforced mesh with a heating device (110°C, 2s), and press the mesh.

[0058] S3. Pour the raw materials mixed in step S1 onto the mesh sheet of step S2 and spread them out.

[0059] S4. Add another layer of alkali-free glass fiber reinforced mesh, then add the perforated ring, and press to form (preheat the mold to 48℃, pressure 20MPa). After hardening and cooling, the cutting disc is obtained. The specific hardening steps are as follows: first, dehumidify by holding at 55℃ for 24 hours; then, slowly raise the temperature to 100℃ for 5 hours and hold for 3 hours; then, hold at 110℃ for 4 hours; then, hold at 120℃ for 2 hours; then, hold at 130℃ for 1.5 hours; then, hold at 140℃ for 2 hours; and finally, hold at 180℃ for 6 hours. The specifications of the prepared cutting disc are: APB107x1.2x16, outer diameter 107mm, hole diameter 16mm, thickness 1.2mm.

[0060] Example 3

[0061] The cutting disc in Example 3 comprises, in sequence, an alkali-free glass fiber reinforced mesh, a cutting surface layer, and an alkali-free glass fiber reinforced mesh. The raw materials for preparing the cutting surface layer include: 10 parts potassium cryolite, 5 parts barite, 8 parts phenolic resin liquid (solid content of 75%), 14 parts phenolic resin powder, 42 parts iridium-plated brown corundum, 8 parts white corundum, and 13 parts green silicon carbide.

[0062] The cutting disc is prepared by the following steps:

[0063] S1. Weigh the raw materials for the cutting surface layer according to the above weight proportions. Pre-treat the filler: Disperse 10 parts potassium cryolite and 5 parts barite in 60 parts anhydrous ethanol, then add 5 parts glycerol and 18 parts KH-560, ultrasonically vibrate for 50 min, then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 42 parts iridium-plated brown corundum, 8 parts white corundum and 13 parts green silicon carbide in an anhydrous ethanol solution (27 w / w%) of 500 parts hydrogenated rosin resin, ultrasonically vibrate for 40 min, then remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use.

[0064] S2. Preheat the mold to 48°C, place a layer of alkali-free glass fiber reinforced mesh, soften the alkali-free glass fiber reinforced mesh with a heating device (110°C, 3s), and press the mesh.

[0065] S3. Pour the raw materials mixed in step S1 onto the mesh sheet of step S2 and spread them out.

[0066] S4. Add another layer of alkali-free glass fiber reinforced mesh, then add the perforated ring, and press to form (preheat the mold to 52℃, pressure 22MPa). After hardening and cooling, the cutting disc is obtained. The specific hardening steps are as follows: first, hold at 55℃ for 24 hours to dehumidify; then, slowly raise the temperature to 100℃ for 5 hours and hold for 3 hours; then, hold at 110℃ for 4 hours; then, hold at 120℃ for 2 hours; then, hold at 130℃ for 1.5 hours; then, hold at 140℃ for 2 hours; and finally, hold at 180℃ for 6 hours. The specifications of the prepared cutting disc are: APB107x1.2x16, outer diameter 107mm, hole diameter 16mm, thickness 1.2mm.

[0067] Example 4

[0068] The difference between Example 4 and Example 1 is that the cutting disc in Example 4 was prepared by the following steps:

[0069] S1. Weigh the raw materials for the cutting surface layer according to the above weight proportions. Pre-treat the filler: Disperse 6 parts potassium cryolite and 4 parts barite in 50 parts anhydrous ethanol, then add 13 parts KH-560, ultrasonically vibrate for 30 minutes, then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 46 parts iridium-plated brown corundum, 14 parts white corundum and 16 parts green silicon carbide in an anhydrous ethanol solution (25w / w%) of 350 parts hydrogenated rosin resin, ultrasonically vibrate for 30 minutes, then remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use.

[0070] Steps S2, S3, and S4 are the same as in Example 1.

[0071] Comparative Example 1

[0072] The difference between Comparative Example 1 and Example 1 is that the cutting surface layer of Comparative Example 1 does not include green silicon carbide, and its raw materials include: 6 parts potassium cryolite, 4 parts barite, 4 parts phenolic resin liquid (solid content of 75%), 10 parts phenolic resin powder, 62 parts iridium-plated brown corundum, and 14 parts white corundum. The preparation method of the cutting disc is the same as that of Example 1.

[0073] Comparative Example 2

[0074] The difference between Comparative Example 2 and Example 1 is that the cutting disc of Comparative Example 2 was prepared by the following steps:

[0075] S1. Weigh the raw materials for the preparation of the cutting surface layer according to the above weight proportions. The filler has no pretreatment and the abrasive has no pretreatment. Mix the filler, phenolic resin liquid, phenolic resin powder and abrasive for later use. Steps S2, S3 and S4 are the same as in Example 1.

[0076] Comparative Example 3

[0077] The difference between Comparative Example 3 and Example 1 is that the cutting disc of Comparative Example 3 was prepared by the following steps:

[0078] S1. Weigh the raw materials for the preparation of the cutting surface layer according to the above weight parts. The filler is not pretreated. The abrasive is pretreated: 46 parts of iridium-plated brown corundum, 14 parts of white corundum and 16 parts of green silicon carbide are placed in an anhydrous ethanol solution (25w / w%) of 350 parts of hydrogenated rosin resin, and ultrasonically vibrate for 30 minutes. The abrasive is then taken out and dried. Then the filler, phenolic resin liquid, phenolic resin powder and pretreated abrasive are mixed and set aside. Steps S2, S3 and S4 are the same as in Example 1.

[0079] Comparative Example 4

[0080] The difference between Comparative Example 4 and Example 1 is that the cutting disc of Comparative Example 4 was prepared by the following steps:

[0081] S1. Weigh the raw materials for the cutting surface layer according to the above weight proportions, and pre-treat the filler: disperse 6 parts potassium cryolite and 4 parts barite in 50 parts anhydrous ethanol, then add 2 parts glycerol and 13 parts KH-560, ultrasonically vibrate for 30 minutes, and then take out the potassium cryolite and barite for drying; the abrasive is not pre-treated; then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and abrasive for later use; steps S2, S3 and S4 are the same as in Example 1.

[0082] Comparative Example 5

[0083] The difference between Comparative Example 5 and Example 1 is that the cutting disc of Comparative Example 5 was prepared by the following steps:

[0084] S1. Weigh the raw materials for the cutting surface layer according to the above-mentioned weight proportions. Pre-treat the filler: Disperse 6 parts potassium cryolite and 4 parts barite in 50 parts anhydrous ethanol, then add 2 parts glycerol and 13 parts KH-560, and ultrasonically vibrate for 30 minutes. Then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 46 parts iridium-plated brown corundum, 14 parts white corundum and 16 parts green silicon carbide in 350 parts anhydrous ethanol, then add 14 parts glycerol and 91 parts KH-560, and ultrasonically vibrate for 30 minutes. Then remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use. Steps S2, S3 and S4 are the same as in Example 1.

[0085] Comparative Example 6

[0086] The difference between Comparative Example 6 and Example 1 is that the cutting disc of Comparative Example 6 was prepared by the following steps:

[0087] S1. Weigh the raw materials for the cutting surface layer according to the above-mentioned weight proportions. Pre-treat the filler: Disperse 6 parts of potassium cryolite and 4 parts of barite in 50 parts of anhydrous ethanol solution (25w / w%) of hydrogenated rosin resin, and ultrasonically vibrate for 30 minutes. Then remove the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 46 parts of iridium-plated brown corundum, 14 parts of white corundum and 16 parts of green silicon carbide in 350 parts of anhydrous ethanol solution (25w / w%) of hydrogenated rosin resin, and ultrasonically vibrate for 30 minutes. Remove the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use. Steps S2, S3 and S4 are the same as in Example 1.

[0088] Comparative Example 7

[0089] The difference between Comparative Example 7 and Example 1 is that the cutting disc of Comparative Example 7 was prepared by the following steps:

[0090] S1. Weigh the raw materials for the cutting surface layer according to the above-mentioned weight proportions. Pre-treat the filler: Disperse 6 parts potassium cryolite and 4 parts barite in 50 parts anhydrous ethanol, then add 2 parts glycerol and 13 parts KH-560, and ultrasonically vibrate for 30 minutes. Then take out the potassium cryolite and barite and dry them. Pre-treat the abrasive: Place 46 parts iridium-plated brown corundum, 14 parts white corundum and 16 parts green silicon carbide in an anhydrous ethanol solution (25w / w%) of 350 parts phenolic resin powder, and ultrasonically vibrate for 30 minutes. Take out the abrasive and dry it. Then mix the pre-treated filler, phenolic resin liquid, phenolic resin powder and pre-treated abrasive for later use. Steps S2, S3 and S4 are the same as in Example 1.

[0091] To ensure data accuracy, all cutting discs were manufactured to the same specifications: 107mm outer diameter, 1.2mm thickness, and 16mm bore diameter. All discs used were Bosch brand angle grinders, 850W power, and 11000r / min speed. The steel cut was 12mm diameter solid round steel (45#), the stainless steel was 12mm diameter solid 304 stainless steel, the PVC pipe was a commonly used 20mm diameter hollow pipe with a wall thickness of 1.25mm, and the ceramic tile was a commonly used 12mm thick and 100mm wide floor tile. Each grinding wheel was used to cut each material a maximum of 10 times.

[0092] Table 1: Performance test results of the cutting discs prepared in Examples 1-4 and Comparative Examples 1-7

[0093]

[0094]

[0095] Cutting ratio: The ratio of workpiece area loss to grinding wheel area loss; the higher the ratio, the more durable the workpiece.

[0096] Cutting efficiency: The average time taken to cut a workpiece once; the shorter the time, the sharper the cut.

[0097] The results above show that the cutting disc produced by this invention exhibits the highest cutting ratio and fastest cutting efficiency when cutting various materials used in home decoration. In contrast, the improper pretreatment methods used in Comparative Examples 2-6 with abrasives and / or fillers led to a decrease in the cutting ratio and prolonged cutting efficiency of the cutting discs prepared in Comparative Examples 2-6.

[0098] The filler and abrasive of the present invention are pretreated through appropriate steps, which can effectively improve the bonding strength between the filler and abrasive and the binder, thereby ultimately improving the cutting performance of the cutting disc.

[0099] All aspects, embodiments, and features of this invention should be considered illustrative in all respects and not limiting of the invention; the scope of the invention is defined only by the claims. Other embodiments, modifications, and uses will become apparent to those skilled in the art without departing from the spirit and scope of the invention as claimed.

[0100] In the preparation method of this invention, the order of the steps is not limited to the listed order. For those skilled in the art, variations in the order of the steps without creative effort are also within the scope of protection of this invention. Furthermore, two or more steps or actions can be performed simultaneously.

[0101] Finally, it should be noted that the specific embodiments described herein are merely illustrative examples of the invention and are not intended to limit the implementation of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them; it is neither necessary nor possible to exemplify all embodiments here. However, these obvious variations or modifications derived from the essential spirit of the invention still fall within the scope of protection of the invention, and interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A multipurpose cutting sheet, characterized by, The cutting disc comprises a mesh layer, a cutting surface layer and a mesh layer in sequence, and the cutting surface layer is prepared from the following components in parts by weight: 5-19 parts of filler, 4-8 parts of phenolic resin solution, 9-16 parts of phenolic resin powder, and 57-82 parts of abrasive; The abrasive is pretreated before being mixed with other raw materials, and the pretreatment process comprises the following steps: placing the abrasive in a hydrogenated rosin resin solution in anhydrous ethanol, ultrasonic oscillation for 30-60 min, and then taking out the abrasive for drying; The filler is pretreated before being mixed with other raw materials, and the pretreatment process comprises the following steps: dispersing the filler in anhydrous ethanol, then adding glycerol and a coupling agent, the mass of the glycerol being 1-20 wt% of the anhydrous ethanol, ultrasonic oscillation for 20-60 min, and then taking out the filler for drying.

2. The multipurpose cutting sheet according to claim 1, wherein The filler is potassium cryolite and barite.

3. The multipurpose cutting disc according to claim 2, wherein In the raw materials for preparing the cutting surface layer, the weight of the potassium cryolite is 3-14 parts, and the weight of the barite is 2-5 parts.

4. The multipurpose cutting sheet according to claim 1, wherein The mass ratio of the coupling agent to the filler is 0.3:1-1.5:

1.

5. The multipurpose cutting disc according to claim 1, wherein The abrasive comprises the following components in mass percentage: 50-70% of iridium-plated brown corundum, 10-20% of white corundum, and 20-30% of green silicon carbide.

6. The multipurpose cutting disc according to claim 1, wherein The mass ratio of the hydrogenated rosin resin solution in anhydrous ethanol to the abrasive is 10:1-2:

1.

7. The multipurpose cutting disc according to claim 1, wherein The thickness of the cutting disc is 0.5-5 mm.

8. A method of making a utility cutting sheet as claimed in claim 1, characterized in that, The method comprises the following steps: S1, weighing the raw materials for preparing the cutting surface layer, pretreating the filler, pretreating the abrasive, and then mixing the raw materials for standby; S2, preheating the mold to 40-50℃, placing a layer of mesh, baking the mesh soft with a heating device, and pressing the mesh; S3, putting the mixed raw materials of step S1 on the mesh of step S2, and spreading them flat; S4, placing another layer of mesh, then placing a hole ring, and pressing to form, and then hardening and cooling to obtain the cutting disc of the corresponding specification.

9. The production method according to claim 8, characterized by, The hardening process comprises the following steps: keeping at 45-60℃ for 12-36 h, then increasing the temperature to 90-110℃ for 1-5 h, then keeping at 106-117℃ for 2-6 h, then keeping at 117-126℃ for 1-3 h, then keeping at 126-138℃ for 1-2 h, then keeping at 138-146℃ for 2-2.5 h, and finally keeping at 175-188℃ for 5-6 h.

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