Metal-resin composite grinding block for processing inorganic stone of calcium carbonate and preparation method thereof

Abstract

The application discloses a metal-resin composite grinding block for processing calcium carbonate inorganic stone and a preparation method thereof. The composite grinding block comprises a clamping seat and a grinding block fixed on the clamping seat. The grinding block comprises a resin base, metal grinding blocks arranged on the upper surface of the resin base, and resin grinding blocks. The resin grinding blocks are arranged on the two sides of the metal grinding blocks. The resin grinding blocks are integrally formed with the resin base. The inclined grooves for chip removal and cooling are arranged between the resin grinding blocks and the metal grinding blocks and between the metal grinding blocks. The metal-resin composite grinding block can obtain a good and continuous polishing effect during the polishing process of the calcium carbonate inorganic stone, can effectively avoid the problems of brick surface grinding and crushing, and can guarantee the service life of the grinding block.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ceramic stone processing consumables, in particular to a metal resin composite grinding block for processing calcium carbonate inorganic stone and a preparation method thereof. BACKGROUND

[0002] Artificial inorganic stone has become an important representative in the stone industry due to its safety, environmental protection, sustainability and other advantages. In particular, artificial inorganic stone is widely welcomed due to its environmentally friendly processing link. Artificial inorganic stone uses more than 90% of waste residues from recycled ceramic production as its raw material, and does not need to be sintered in the production process, effectively reducing energy consumption and emissions. At the same time, it uses specific cloth technology to customize texture, realizes whole-body texture through inorganic condensation, and reproduces the texture of stone. Existing artificial inorganic stone is divided into calcium carbonate artificial inorganic stone and quartz stone artificial inorganic stone. The hardness of calcium carbonate artificial inorganic stone is smaller than that of quartz stone artificial inorganic stone due to its material properties and forming conditions, and the material is relatively soft.

[0003] After processing and forming, the calcium carbonate artificial inorganic stone will use stone grinding blocks for surface polishing to improve its surface smoothness and brightness and improve product quality. The existing stone grinding blocks are mainly divided into the following three types: (1) silicon carbide grinding block, which is low in price but short in service life, and has general polishing effect, and is often used for processing stone with low requirements; (2) metal grinding block, which is expensive and has long service life, high hardness, poor toughness, large cutting force, and large contact area with stone plate surface, which is easy to grind and crush the stone plate surface, and the metal grinding block does not have polishing effect, and is generally used in the rough grinding process of the stone processing production line, and still needs an additional polishing process for secondary polishing, which makes the processing process more complex and high in cost. (3) Resin grinding block, which is expensive and has a general service life, and has the best polishing effect compared to silicon carbide grinding block, and is the main grinding block consumable for processing stone on the market. Its forming method is mainly divided into hot pressing and pouring. Due to the characteristics of the resin material, the service life is shorter than that of the metal grinding block, but the toughness and the effect of processing the stone ceramic plate surface are the best.

[0004] However, compared with other ceramics or quartz inorganic stones, the calcium carbonate artificial inorganic stone is relatively soft, and it is more prone to grinding, crushing, low gloss and other problems during the polishing process of the calcium carbonate artificial inorganic stone plate, resulting in low product yield.

[0005] Therefore, it is necessary to design a new type of grinding block consumable for the polishing process of calcium carbonate inorganic stone, which can replace the existing silicon carbide grinding block, resin grinding block and metal grinding block, and solve the technical problems of grinding, crushing, low gloss and other problems of the soft artificial inorganic stone in the polishing process, which affect the low product yield. SUMMARY

[0006] In order to overcome the deficiencies of the prior art, one of the purposes of the present application is to provide a metal-resin composite grinding block for processing calcium carbonate inorganic stone.

[0007] The second purpose of the present application is to provide a preparation method of a metal-resin composite grinding block for processing calcium carbonate inorganic stone.

[0008] One of the purposes of the present application is achieved by the following technical scheme: a metal-resin composite grinding block for processing calcium carbonate inorganic stone, comprising a clamping seat and a grinding block fixed on the clamping seat, the grinding block comprising a resin base, a metal grinding block and a resin grinding block arranged on the upper surface of the resin base, the resin grinding blocks being located on both sides of the metal grinding block, the resin grinding blocks being integrally formed with the resin base, and the metal grinding blocks being provided with inclined grooves for chip removal and cooling between the resin grinding blocks and the metal grinding blocks.

[0009] Further, the inclined directions of each of the inclined grooves are consistent, and the length of the inclined grooves is greater than the short side length of the entire metal-resin composite grinding block, and the width of the inclined grooves is 0.5-1.5cm.

[0010] The second purpose of the present application is achieved by the following technical scheme: a preparation method of a metal-resin composite grinding block for processing calcium carbonate inorganic stone, comprising the following steps:

[0011] (1) Production of metal grinding block:

[0012] The following components are prepared according to the following components of the metal grinding block: iron powder, iron-copper alloy powder, nickel powder, zinc powder, bronze powder, phosphorus iron powder and diamond; the above components are mixed by a mixer, the remaining components except diamond are first poured into the mixer and mixed for 25-35min, then diamond and liquid paraffin are poured in, and mixed for 55-65min; the mixed components are hot-pressed into a predetermined shape by a hot press; the metal grinding block after pressing is polished to remove burrs, which is convenient for subsequent placement in a resin mold;

[0013] (2) Modification treatment of resin liquid:

[0014] The following components are prepared according to the weight parts: 100 parts of epoxy resin, 10-30 parts of hydrogenated nitrile rubber and 1-10 parts of active toughening agent; the above ingredients are stirred uniformly, placed in an oven at 150-180℃, heated for 2-5h and then taken out to obtain a modified resin liquid;

[0015] (3) Production of resin abrasive liquid:

[0016] According to the following components of resin abrasive: silicon carbide, white corundum, zinc oxide, aluminum oxide, fiber powder, shell powder, white carbon black, cerium oxide, diamond; the diamond and the rest of the powder are poured into the mixer at the same time for mixing, mixing for 1-2h, taking out, obtaining the resin mixed powder; the modified resin liquid obtained in step (2) is poured into the stirring barrel, the diluent is added, stirred uniformly, then poured into the mixed resin mixed powder, stirred uniformly, finally the curing agent is added, stirred uniformly, obtaining the resin abrasive liquid;

[0017] (4) Preparation of metal resin composite abrasive block:

[0018] According to the preset shape design of the metal resin composite abrasive block forming mold, the forming mold has a flat cavity opening and four cavities arranged in sequence below the flat cavity opening, the flat cavity opening communicates with the four cavities; first, the metal abrasive block obtained in step (1) is placed in the two cavities in the middle position of the four cavities of the forming mold, then the resin abrasive liquid obtained in step (3) is poured into the forming mold, filling the entire flat cavity opening, placing the pressing plate, pressing for 8-24 hours, taking out;

[0019] (5) Post-processing:

[0020] The metal resin composite abrasive block obtained in step (4) is subjected to secondary curing and edge opening, and then is pasted on the clamping seat to obtain the finished metal resin composite abrasive block.

[0021] Further, in step (1), the metal abrasive block comprises the following components by mass percentage: iron powder 30-50%, iron-copper alloy powder 10-20%, nickel powder 3-6%, zinc powder 1-10%, bronze powder 10-15%, phosphorus iron powder 5-15%, and diamond 3-6%; the amount of liquid paraffin is 2-4% of the weight of the remaining powder except diamond.

[0022] Further, in step (1), the conditions of hot pressing forming are as follows: taking temperature 100℃ and pressure 20KN as the starting conditions, increasing the temperature to 780-830℃ and the pressure to 100-120KN in stages, and maintaining the temperature for 3min.

[0023] Further, in step (2), the active toughening agent is CMP-410 epoxy resin active toughening agent.

[0024] Further, in step (3), the resin abrasive comprises the following components in percentage by mass: 30-50% of silicon carbide, 10-20% of white corundum, 5-15% of zinc oxide, 5-15% of aluminum oxide, 5-15% of fiber powder, 5-10% of nutshell powder, 5-10% of white carbon black, 5-20% of cerium oxide, and 5-15% of diamond; the amount of the modified resin liquid is 25-45% of the amount of the resin abrasive, the amount of the diluent is 5-15% of the amount of the epoxy resin, the diluent is RD-601 epoxy active diluent, the amount of the curing agent is 30-50% of the amount of the epoxy resin, the amount of the catalyst is 1-3% of the amount of the curing agent, the curing agent is polyamide curing agent 651, and the catalyst is DMP-30.

[0025] Further, in step (4), the pressing condition is as follows: the pressure is 100 kg at room temperature.

[0026] Further, in step (5), the secondary curing process is as follows: the metal resin composite abrasive block after curing in step (4) is taken out of the forming mold, placed in an oven, and kept at a temperature of 80-150 ℃ for 2-5 h.

[0027] Further, in step (5), the sharpening refers to removing the resin layer on the upper surface of the metal abrasive block by using a grinding wheel.

[0028] Compared with the prior art, the application has the following beneficial effects:

[0029] (1) The application is characterized in that the metal abrasive block and the resin abrasive block with the improved formula are combined with each other, the modified resin liquid has good adhesion with the metal part, the metal abrasive block part and the resin abrasive block part can be combined together, the resin abrasive blocks on both sides of the abrasive block have good flexibility and polishing ability, can remove and repair the small abrasive grains processed by the metal abrasive block during polishing, can process the small pits on the plate surface, prevent the plate surface from being polished, and effectively avoid the situation that the plate surface is polished and crushed, and can achieve the effect of pre-polishing during rough polishing and medium polishing, improve the later fine polishing, ensure the gloss effect, and meet the polishing needs of the calcium carbonate inorganic stone with soft texture. In addition, the metal abrasive block in the middle of the abrasive block has excellent cutting force on the plate, and ensures the service life of the abrasive block, and is especially suitable for rough polishing and medium polishing on the polishing line.

[0030] (2) The application is suitable for rough polishing and medium polishing of the calcium carbonate inorganic stone, does not need to be used in combination with the diamond abrasive block or the silicon carbide abrasive block, has simple arrangement, improves production efficiency, and reduces production cost. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1This is a schematic diagram of the structure of a metal-resin composite grinding block for processing calcium carbonate inorganic stone according to a preferred embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the molding die for a metal-resin composite grinding block according to a preferred embodiment of the present invention.

[0033] In the diagram: 1. Grinding block; 11. Resin base; 12. Metal grinding block; 13. Resin grinding block; 14. Inclined groove; 2. Card holder. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art.

[0036] like Figure 1 As shown, a metal-resin composite grinding block for processing calcium carbonate inorganic stone includes a mounting base 2 and a grinding block 1 fixed on the mounting base. The grinding block 1 includes a resin base 11, a metal grinding block 12 and a resin grinding block 13 disposed on the upper surface of the resin base. The resin grinding blocks are located on both sides of the metal grinding blocks. The resin grinding blocks and the resin base are integrally formed. Inclined grooves 14 for chip removal and cooling are provided between the resin grinding blocks and the metal grinding blocks, and between the metal grinding blocks.

[0037] In view of the problems that easily occur during the polishing process of calcium carbonate artificial stone slabs, such as scratches, broken slabs, and low gloss, which reduce the customer's yield, this application designs a new consumable material, metal-resin composite abrasive block, for the subsequent polishing of calcium carbonate inorganic stone. It can replace the current polishing processing methods of silicon carbide abrasive blocks, resin abrasive blocks, and metal abrasive blocks, and focuses on solving the problems of scratches, broken slabs, and low gloss.

[0038] As a further embodiment, the inclined directions of each of the inclined grooves are consistent, and the length of the inclined groove is greater than the short side length of the entire metal-resin composite abrasive block. The width of the inclined groove is 0.5-1.5 cm. The shape and distribution of the inclined grooves are more conducive to preventing the problem of more abrasive scratches caused by the inability to remove debris in time when the metal and resin abrasive blocks are polished simultaneously after being combined. In addition, this metal-resin composite abrasive block is installed on a grinding machine and driven by the grinding machine to make a circular motion. At this time, the inclined direction of the inclined groove is preferably connected to the rotational tangent direction of the metal-resin composite abrasive block, so that waste can be quickly discharged from the polishing working surface of the grinding machine, improving the polishing quality.

[0039] The second object of the present application is achieved by the following technical solution: a preparation method of a metal resin composite grinding block for processing calcium carbonate inorganic stone, comprising the following steps:

[0040] (1) Preparation of metal grinding block:

[0041] The metal grinding block is prepared according to the following components: iron powder, iron-copper alloy powder, nickel powder, zinc powder, bronze powder, phosphorus iron powder, and diamond. The above components are mixed in a mixer. The remaining components except for diamond are first poured into the mixer and mixed for 25-35 minutes. Then, diamond and liquid paraffin are poured in and mixed for another 55-65 minutes. The mixed components are hot-pressed into a predetermined shape using a hot press. The pressed metal grinding block is surface polished to remove burrs for subsequent placement in a resin mold.

[0042] As a further embodiment, in step (1), the metal grinding block comprises the following components by mass percentage: iron powder 30-50%, iron-copper alloy powder 10-20%, nickel powder 3-6%, zinc powder 1-10%, bronze powder 10-15%, phosphorus iron powder 5-15%, and diamond 3-6%. The amount of liquid paraffin is 2-4% of the weight of the remaining powder except for diamond.

[0043] The hot-pressing conditions are as follows: starting with a temperature of 100°C and a pressure of 20KN, the temperature is gradually increased to 780-830°C, and the pressure is gradually increased to 100-120KN, with intermediate holding for 3 minutes.

[0044] (2) Modification treatment of resin liquid:

[0045] The following components are prepared according to weight parts: 100 parts of epoxy resin, 10-30 parts of hydrogenated nitrile rubber, and 1-10 parts of active toughening agent. The above ingredients are stirred uniformly and placed in an oven at 150-180°C for 2-5 hours before being taken out to obtain the modified resin liquid.

[0046] As a further embodiment, the active toughening agent is CMP-410 epoxy resin active toughening agent.

[0047] (3) Preparation of resin abrasive liquid:

[0048] The following components are prepared according to the components of the resin abrasive: silicon carbide, white corundum, zinc oxide, aluminum oxide, fiber powder, nutshell powder, white carbon black, cerium oxide, and diamond. The diamond and the remaining powder are simultaneously poured into a mixer for mixing for 1-2 hours to obtain resin mixed powder. The modified resin liquid obtained in step (2) is poured into a stirring barrel, a diluent is added, and stirred uniformly. Then, the mixed resin powder is poured in and stirred uniformly. Finally, a curing agent is added and stirred uniformly to obtain the resin abrasive liquid.

[0049] As a further embodiment, in step (3), the resin abrasive comprises the following components by mass percentage: 30-50% silicon carbide, 10-20% white corundum, 5-15% zinc oxide, 5-15% aluminum oxide, 5-15% fiber powder, 5-10% nutshell powder, 5-10% silica, 5-20% cerium oxide, and 5-15% diamond; the amount of the modified resin liquid is 25-45% of the amount of the resin abrasive; the amount of the diluent is 5-15% of the amount of epoxy resin; the diluent is RD-601 epoxy reactive diluent; the amount of the curing agent is 30-50% of the amount of epoxy resin; the amount of the catalyst is 1-3% of the amount of the curing agent; the curing agent is polyamide curing agent 651; and the catalyst is DMP-30.

[0050] (4) Fabrication of metal-resin composite grinding blocks:

[0051] The molding die is designed according to the pre-set shape of the metal-resin composite grinding block, such as... Figure 2 As shown, the molding die has a flat cavity opening and four cavities arranged in sequence below the flat cavity opening. The flat cavity opening is connected to the four cavities. First, the metal abrasive block obtained in step (1) is placed into the two cavities in the middle of the four cavities of the molding die. Then, the resin abrasive liquid obtained in step (3) is poured into the molding die to fill the entire flat cavity opening. The pressure plate is placed on top and the die is pressed for 8-24 hours before being taken out.

[0052] As a further implementation, in step (4), the pressing conditions are as follows: pressing is performed at room temperature and a pressure of 100 kg.

[0053] (5) Post-processing:

[0054] The metal resin composite abrasive block obtained in step (4) is subjected to secondary curing and burr removal. The metal abrasive block part of the metal resin composite abrasive block is sharpened and then pasted onto the card holder to obtain the finished metal resin composite abrasive block.

[0055] As a further implementation, in step (5), the secondary curing process is as follows: the metal resin composite grinding block cured in step (4) is taken out from the molding mold and placed in an oven, and kept at a temperature of 80-150℃ for 2-5 hours.

[0056] In step (5), removing burrs involves trimming the burrs around the metal resin composite grinding block that has undergone secondary curing to avoid affecting the subsequent bonding of the card holder.

[0057] In step (5), the sharpening refers to removing the resin layer on the upper surface of the metal grinding block using a grinding wheel.

[0058] In step (5), the adhesive holder is to bond the metal resin composite abrasive block with glue on the holder, which is used for assembling on the grinding machine, and is suitable for coarse grinding and medium grinding of calcium carbonate inorganic stone, and does not need to be used with diamond abrasive block or silicon carbide abrasive block, and the arrangement is simple, the production efficiency is improved, and the production cost is reduced.

[0059] The application improves the formula of the resin abrasive block, combines the structure design of the mutual composite of the metal abrasive block, and the resin abrasive blocks on both sides of the abrasive block have good flexibility and polishing capacity, so that the polishing and grinding needs of the calcium carbonate inorganic stone with soft texture can be met, the technical problems of low product yield caused by the problems such as grinding, board rotting and low gloss in the polishing process of the artificial inorganic stone with soft material are solved. At the same time, the metal abrasive block in the middle of the abrasive block can greatly improve the service life and cutting force of the grinding tool, and is especially suitable for the rough polishing and medium polishing positions on the polishing processing line.

[0060] The following is a specific embodiment of the application, and the raw materials, equipment and the like used in the following examples can be obtained by purchase unless otherwise specified.

[0061] Examples 1-3 and Comparative Examples 1-10

[0062] The raw materials are weighed according to the proportions in Table 1, and the abrasive blocks are prepared according to the preparation method after Table 1 to obtain abrasive blocks of different examples, and the details are shown in Table 1-2.

[0063] Table 1 Raw material ratio table of metal abrasive block of examples 1-3

[0064] Example 1 Example 2 Example 3 Iron powder (30-50%) 48 42 36 Iron-copper alloy powder (10-20%) 17 18 19 Nickel powder (3-6%) 6 5 4 Zinc powder (1-10%) 2 8 9 Bronze powder (10-15%) 15 12 13 Phosphorous iron powder (5-15%) 8 10 13 Diamond (3-6%) 4 5 6

[0065] Table 2 Raw material ratio table of resin abrasive block of examples 1-3

[0066]

[0067] The preparation method of the metal resin composite abrasive block of examples 1-3 includes the following steps:

[0068] (1) Preparation of metal abrasive block:

[0069] The metal abrasive block is prepared according to the following components in Table 1: iron powder, iron-copper alloy powder, nickel powder, zinc powder, bronze powder, phosphorus iron powder, diamond; the above components are mixed by using a mixer, the remaining components except the diamond are first poured into the mixer and mixed for 25-35 minutes, then the diamond and liquid paraffin are poured, and mixed for 55-65 minutes; the mixed components are hot-pressed into a preset shape by using a hot press; the metal abrasive block after being pressed is polished to remove burrs, so as to facilitate subsequent placement in a resin mold; the amount of liquid paraffin is 3% of the weight of the remaining powders except the diamond; the hot-pressing conditions are as follows: the initial conditions are a temperature of 100 DEG C and a pressure of 20 KN, the temperature is increased to 780-830 DEG C in stages, the pressure is increased to 100-120 KN, and the temperature is maintained for 3 minutes in the middle.

[0070] (2) Modification treatment of resin liquid:

[0071] According to the following components by weight: 100 parts of epoxy resin, 25 parts of hydrogenated nitrile rubber, 5 parts of active toughening agent; the above ingredients are stirred uniformly, placed in an oven at 150-180 DEG C, heated for 2-5 hours, and then taken out to obtain a modified resin liquid; wherein the active toughening agent is CMP-410 epoxy resin active toughening agent.

[0072] (3) Preparation of resin abrasive liquid:

[0073] The resin abrasive is prepared according to the following components in Table 2: silicon carbide, white corundum, zinc oxide, aluminum oxide, fiber powder, nutshell powder, white carbon black, cerium oxide, diamond; the diamond and the remaining powders are simultaneously poured into a mixer for mixing, mixed for 1-2 hours, and then taken out to obtain resin mixed powder; the modified resin liquid obtained in step (2) is poured into a stirring barrel, a diluent and a catalyst are added, stirred uniformly, then the mixed resin powder is poured into the stirring barrel and stirred uniformly, and finally a curing agent is added and stirred uniformly to obtain a resin abrasive liquid.

[0074] (4) Preparation of metal-resin composite abrasive block:

[0075] A forming mold with a flat cavity opening and four cavities arranged in sequence below the flat cavity opening is designed according to the shape of the metal-resin composite abrasive block; the flat cavity opening is in communication with the four cavities; the metal abrasive block obtained in step (1) is first placed in the two cavities in the middle position of the four cavities of the forming mold, then the resin abrasive liquid obtained in step (3) is poured into the forming mold to fill the entire flat cavity opening, a pressing plate is placed, and the pressing is carried out for 8-24 hours; the pressing conditions are as follows: the pressure is 100 kg at room temperature.

[0076] (5) Post-processing:

[0077] The metal resin composite grinding block obtained in step (4) is subjected to secondary curing, burr removal, and the metal grinding block part of the metal resin composite grinding block is subjected to blade opening, and then is pasted on a clamping seat to obtain a finished metal resin composite grinding block. The secondary curing process is as follows: the cured metal resin composite grinding block is taken out of the forming mold, placed in an oven, and kept at a temperature of 80-150°C for 2-5h. The burr removal is to cut off the burrs around the metal resin composite grinding block after secondary curing to avoid affecting the subsequent bonding of the clamping seat. The blade opening refers to removing the resin layer on the upper surface of the metal grinding block with a grinding wheel. The bonding of the clamping seat is to bond the metal resin composite grinding block to the clamping seat with glue, and then assemble it on the grinding machine for use.

[0078] Comparative Example 1

[0079] In the preparation method of the metal resin grinding block in Example 2, step (2) is omitted, that is, the resin liquid is not modified, and the remaining steps, conditions and reagent formulations used are basically the same as those in Example 2.

[0080] Comparative Example 2

[0081] In the preparation method of the metal resin grinding block in Example 2, the formula of the modified resin liquid in step (2) is different, and nitrile rubber is used instead of hydrogenated nitrile rubber, and the remaining steps, conditions and reagent formulations used are basically the same as those in Example 2.

[0082] The specific modification process is as follows: according to weight parts, the following components are dosed: epoxy resin 100 parts, nitrile rubber 25 parts; the above dosed components are stirred uniformly, placed in an oven at 150-180°C, heated for 2-5h, and then taken out to obtain a modified resin liquid;

[0083] Comparative Example 3

[0084] In the preparation method of the metal resin grinding block in Example 2, the formula of the modified resin liquid in step (2) is different, and does not contain hydrogenated nitrile rubber, and the remaining steps, conditions and reagent formulations used are basically the same as those in Example 2.

[0085] The specific modification process is as follows: according to weight parts, the following components are dosed: epoxy resin 100 parts, active toughening agent 5 parts; the above dosed components are stirred uniformly, placed in an oven at 150-180°C, heated for 2-5h, and then taken out to obtain a modified resin liquid; wherein the active toughening agent is CMP-410 epoxy resin active toughening agent.

[0086] Comparative Example 4

[0087] In the preparation method of the metal resin grinding block in Example 2, the formula of the modified resin liquid in step (2) is different, and does not contain an active toughening agent, and the remaining steps, conditions and reagent formulations used are basically the same as those in Example 2.

[0088] The modification treatment is as follows: ingredients are prepared according to weight parts: epoxy resin 100 parts, hydrogenated nitrile rubber 25 parts; the above ingredients are stirred uniformly, put into an oven at 150-180°C, heated for 2-5h, and then taken out to obtain a modified resin liquid.

[0089] Comparative Example 5

[0090] In the preparation method of the metal-resin grinding block of Example 2, step (1) is omitted to make metal grinding blocks, i.e. the grinding block contains 4 resin grinding blocks, and the remaining steps, conditions and reagent formulations used are basically the same as those of Example 2.

[0091] Comparative Example 6

[0092] In the preparation method of the metal-resin grinding block of Example 2, step (1) is omitted to make metal grinding blocks, i.e. the grinding block contains 4 resin grinding blocks, and the remaining steps, conditions and reagent formulations used are basically the same as those of Example 2.

[0093] Comparative Example 7

[0094] In the preparation method of the metal-resin grinding block of Example 2, the forming mold in step (4) is different, i.e. the forming mold does not leave a partition plate between the four cavities, i.e. the formed grinding block does not leave a chute, and the remaining steps, conditions and reagent formulations used are basically the same as those of Example 2.

[0095] Comparative Example 8

[0096] In the preparation method of the metal-resin grinding block of Example 2, the curing agent used in step (3) is different, i.e. the curing agent is changed to 593 curing agent. The remaining steps, conditions and reagent formulations used are basically the same as those of Example 2.

[0097] Comparative Example 9

[0098] In the preparation method of the metal-resin grinding block of Example 2, the process of the modified resin liquid in step (5) is different, i.e. it is not cured twice, and the remaining steps, conditions and reagent formulations used are basically the same as those of Example 2.

[0099] Comparative Example 10

[0100] Comparative Example 10 uses existing silicon carbide grinding blocks, which are purchased from the National Company's silicon carbide grinding blocks.

[0101] Comparative Example 11

[0102] Comparative Example 11 uses existing hot-pressed resin grinding blocks, which are purchased from Zhongyi Stone Abrasive Tool Factory.

[0103] Comparative Example 12

[0104] Comparative Example 12 uses existing metal grinding blocks, which are purchased from Guangdong Naihe New Material Co., Ltd.

[0105] Effect evaluation and performance detection

[0106] The performance and application performance of the metal resin composite grinding block of Example 2, Comparative Examples 1-12 were detected. Specifically, the grinding block of each example was installed on a grinding machine, and the calcium carbonate inorganic stone to be polished under the same production line was polished, and the detection items and results are shown in Tables 3-4. The performance detection items include high temperature resistance, modified resin curing time, grinding block hardness, resin elongation at break, grinding block life, gloss of the brick surface, and detection of grinding or plate failure. The gloss is detected according to the GB / T13891-2008 standard.

[0107] Table 3 is the performance test data of the resin grinding block of Example 2 and Comparative Examples 1-12

[0108]

[0109]

[0110] (Note: High temperature resistance refers to placing the resin part of the grinding block in an oven for heating, and recording the temperature at which it softens. The higher the temperature, the better the high temperature resistance of the resin. The curing time of the modified resin refers to the curing time of the resin part of the grinding block after being injected into the mold. The curing time reflects the efficiency of producing the composite grinding block to some extent. The hardness of the grinding block refers to the hardness of the resin part of the grinding block after molding, which is measured by a Huagin plastic Rockwell hardness tester, and the hardness result is recorded. Generally, the larger the value, the greater the hardness. The elongation at break of the resin refers to the deformation of the resin part of the grinding block after molding, and the larger the value, the higher the flexibility and the less likely to break.)

[0111] From the above table, the resin grinding block of the present application has excellent performance in high temperature resistance, wear resistance and elongation at break.

[0112] Comparing Example 2 with Comparative Example 1, Comparative Example 1 lacks step (2), i.e. the modified resin liquid is not added to the resin abrasive liquid, and the test results show that it has an impact on the high temperature resistance, wear resistance and elongation at break.

[0113] Comparing Example 2 with Comparative Example 2, the formula of the modified resin liquid in step (2) of Comparative Example 2 uses nitrile rubber instead of hydrogenated nitrile rubber, and the test results show that hydrogenated nitrile rubber has a greater impact on high temperature resistance, wear resistance and elongation at break than nitrile rubber.

[0114] Comparing Example 2 with Comparative Example 3, the formula of the modified resin liquid in step (2) of Comparative Example 3 is different, and does not contain hydrogenated nitrile rubber. The test results show that hydrogenated nitrile rubber has an impact on tensile, wear and high temperature resistance.

[0115] Comparing Example 2 with Comparative Example 4, the formula of the modified resin solution in Step (2) of Comparative Example 4 is different, and does not contain active toughening agent. The test results show that the active toughening agent has an effect on tensile, wear resistance, and high temperature resistance.

[0116] Comparing Example 2 with Comparative Example 5, no metal grinding block is added in the middle, and only resin grinding block is used. The wear resistance of the grinding block is greatly affected in use.

[0117] Comparing Example 2 with Comparative Example 6, no resin grinding block is added at both ends, and only metal grinding block is used. The tensile rate, processing effect, and gloss of the resin grinding block are obviously improved in use.

[0118] Comparing Example 2 with Comparative Example 7, the groove in the mold has a positive effect on heat dissipation, chip removal, and drainage of the grinding block during use.

[0119] Comparing Example 2 with Comparative Example 8, the use of 651 curing agent is better than 593 curing agent in toughness and temperature resistance.

[0120] Comparing Example 2 with Comparative Example 9, secondary curing can make the modified resin reaction more complete, and the temperature resistance and toughness will increase.

[0121] Comparing Example 2 with Comparative Example 10, the metal resin composite grinding block has low hardness and high tensile rate.

[0122] Comparing Example 2 with Comparative Example 11, the composite grinding block has better temperature resistance and toughness, and lower hardness than the hot-pressed resin grinding block.

[0123] Comparing Example 2 with Comparative Example 12, the toughness of the composite grinding block is better than that of the metal grinding block.

[0124] Table 4 is the application performance test data of the grinding blocks of each example

[0125]

[0126]

[0127]

[0128] (Note: the service life of the grinding block refers to the grinding block polishing brick surface area, the larger the polishing brick surface area, the longer the service life. The plate surface grinding or plate surface is observed after the grinding process, and the surface texture or the presence of the plate surface is observed. The depth of the plate is the thickness of the blank plate, which is 25 cm, and the polishing machine has 16 grinding heads. The thickness difference between the blank plate before and after processing is the depth of the plate. For example, the blank plate is 25 cm before entering the polishing machine, and the thickness is 20 cm after the grinding head processing, which means that the equipment processes 5 cm of the thickness of the brick plate. The greater the depth of the plate, the higher the polishing efficiency.)

[0129] From the above table, the metal resin composite grinding block of the present embodiment can obtain good and continuous polishing effect during the polishing process of calcium carbonate inorganic stone, and can effectively avoid the grinding and crushing of the brick surface, while ensuring the service life of the grinding block. Specifically, the intermediate metal grinding block has excellent cutting force for the plate, which also ensures the service life of the grinding block; the modified resin grinding block at both ends has sufficient toughness, which can remove and repair the fine grinding of the diamond grinding block during the polishing process, and can also process the small pits on the plate surface to prevent the plate surface from grinding. It can also achieve the effect of pre-polishing during rough grinding and medium grinding, which improves the gloss of the later fine grinding and ensures the gloss effect. In the specific embodiment, example 2 has the best calcium carbonate inorganic stone polishing effect and polishing effect, and the longest service life, which is the best embodiment.

[0130] Compared with example 2, comparative example 1 lacks step (2), i.e. the resin liquid is not modified, which shows that the non-modified resin liquid has a great influence on the service life, processing plate effect and gloss of the metal resin grinding block.

[0131] Compared with example 2, comparative example 2 has a different formula of modified resin liquid in step (2), and nitrile rubber is used instead of hydrogenated nitrile rubber, which shows that the metal resin grinding block with nitrile rubber instead of hydrogenated nitrile rubber has a great influence on sharpness and service life.

[0132] Compared with example 2, comparative example 3 has a different formula of modified resin liquid in step (2), and does not contain hydrogenated nitrile rubber, which shows that the metal resin grinding block without hydrogenated nitrile rubber has a great influence on service life and processing plate effect.

[0133] Compared with example 2, comparative example 4 has a different formula of modified resin liquid in step (2), and does not contain active toughening agent, which shows that the metal resin grinding block without active toughening agent has a great influence on service life and processing plate effect.

[0134] Compared with example 2, comparative example 5 lacks step (1) without making metal grinding block, i.e. the grinding block contains 4 resin grinding blocks, which shows that the modified resin grinding block alone has a great influence on service life, sharpness and processing plate effect.

[0135] Compared with Example 2, the Comparative Example 6 makes four metal abrasive blocks in step (1), i.e. the abrasive block contains four metal abrasive blocks, and the base part of the abrasive block is made of resin abrasive, which shows that the pure metal abrasive block has a great influence on gloss and processing plate surface effect.

[0136] Compared with Example 2, the Comparative Example 7 uses a different forming mold in step (4), i.e. the forming mold does not leave a partition plate between the four cavities, which shows that the metal resin abrasive block without the chip removal chute has a great influence on the processing plate surface effect.

[0137] Compared with Example 2, the Comparative Example 8 uses a different curing agent in step (3), i.e. the curing agent is changed to 593 curing agent, which shows that different curing agents have a great influence on the service life of the metal resin abrasive block and the processing plate surface effect.

[0138] Compared with Example 2, the Comparative Example 9 changes the process of the modified resin liquid in step (5), i.e. without secondary curing, which shows that the secondary curing has a great influence on the service life, sharpness and processing plate surface effect of the metal resin abrasive block.

[0139] Compared with Example 2, the silicon carbide abrasive block of the Comparative Example 10 is hard and brittle, easy to cause abrasive wear and board rot, has a short service life and low gloss.

[0140] Compared with Example 2, the conventional resin abrasive block of the Comparative Example 11 is hard and brittle, easy to cause brick surface abrasive wear, has a general service life and is high in price, which is low in cost performance in the polishing process.

[0141] Compared with Example 2, the conventional metal abrasive block of the Comparative Example 12 is the hardest, most likely to cause brick surface abrasive wear and board rot, and can only be used in the rough grinding link in the polishing process, which does not have the polishing function and needs to be matched with an additional polishing process such as a resin abrasive block, and is expensive.

[0142] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application are within the scope of the present application.

Claims

1. A metal-resin composite grinding block for processing calcium carbonate inorganic stone, characterized in that, The device includes a mounting base and a grinding block fixed on the mounting base. The grinding block includes a resin base, a metal grinding block disposed on the upper surface of the resin base, and a resin grinding block. The resin grinding block is located on both sides of the metal grinding block. The resin grinding block and the resin base are integrally formed. Inclined grooves for chip removal and cooling are provided between the resin grinding block and the metal grinding block, and between the metal grinding blocks. The metal-resin composite grinding block for processing calcium carbonate inorganic stone is prepared by the following steps, specifically including the following steps: (1) Preparation of metal grinding blocks: The metal grinding blocks are prepared according to the following components: iron powder, iron-copper alloy powder, nickel powder, zinc powder, bronze powder, phosphorus iron powder, and diamond. The above components are mixed using a mixer. First, all components except diamond are added to the mixer and mixed for 25-35 minutes. Then, diamond and liquid paraffin are added, and the mixture is mixed for another 55-65 minutes. The mixed components are then hot-pressed into a predetermined shape using a hot press. The pressed metal grinding blocks are then surface-polished to remove burrs, facilitating subsequent placement into resin molds. (2) Modification treatment of resin solution: The following components are prepared according to parts by weight: 100 parts epoxy resin, 10-30 parts hydrogenated nitrile rubber, and 1-10 parts active toughening agent. The above ingredients are stirred evenly, placed in an oven at 150-180℃, heated for 2-5 hours, and then removed to obtain a modified resin liquid. The epoxy resin is grade E44, and the active toughening agent is CMP-410 epoxy resin active toughening agent. (3) Preparation of resin abrasive fluid: The resin abrasive is prepared according to the following components: silicon carbide, white corundum, zinc oxide, aluminum oxide, fiber powder, nut shell powder, white carbon black, cerium oxide, and diamond. Diamond and the remaining powders are poured into a mixer and mixed for 1-2 hours to obtain resin mixed powder. The modified resin liquid obtained in step (2) is poured into a mixing tank, a diluent and a catalyst are added, and the mixture is stirred evenly. Then the mixed resin mixed powder is poured in and stirred evenly. Finally, a curing agent is added and stirred evenly to obtain resin abrasive liquid. (4) Fabrication of metal-resin composite grinding blocks: The molding mold is designed according to the preset shape of the metal resin composite grinding block. The molding mold has a flat cavity and four cavities arranged in sequence below the flat cavity. The flat cavity is connected to the four cavities. First, the metal grinding block obtained in step (1) is placed into the two cavities in the middle of the four cavities of the molding mold. Then, the resin abrasive liquid obtained in step (3) is poured into the molding mold to fill the entire flat cavity. The pressure plate is placed on top and pressed for 8-24 hours before being taken out. (5) Post-processing: The metal resin composite abrasive block obtained in step (4) is subjected to secondary curing and burr removal. The metal abrasive block part of the metal resin composite abrasive block is sharpened and then pasted onto the card holder to obtain the finished metal resin composite abrasive block.

2. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, The inclined directions of each of the inclined grooves are consistent, and the length of the inclined groove is greater than the short side length of the entire metal-resin composite grinding block. The width of the inclined groove is 0.5-1.5cm.

3. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (1), the metal grinding block comprises the following components by mass percentage: 30-50% iron powder, 10-20% iron-copper alloy powder, 3-6% nickel powder, 1-10% zinc powder, 10-15% bronze powder, 5-15% phosphorus iron powder, and 3-6% diamond; the amount of liquid paraffin used is 2-4% of the weight of the remaining powders except for diamond.

4. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (1), the hot pressing conditions are as follows: the initial conditions are 100℃ and 20KN, the temperature is gradually increased to 780-830℃, the pressure is increased to 100-120KN, and the temperature is maintained for 3 minutes in between.

5. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (3), the resin abrasive comprises the following components by mass percentage: 30-50% silicon carbide, 10-20% white corundum, 5-15% zinc oxide, 5-15% aluminum oxide, 5-15% fiber powder, 5-10% nutshell powder, 5-10% silica, 5-20% cerium oxide, and 5-15% diamond; the amount of the modified resin liquid is 25-45% of the amount of the resin abrasive; the amount of the diluent is 5-15% of the amount of epoxy resin, the diluent is RD-601 epoxy reactive diluent; the amount of the curing agent is 30-50% of the amount of epoxy resin; the amount of the catalyst is 1-3% of the amount of the curing agent, the curing agent is polyamide curing agent 651, and the catalyst is DMP-30.

6. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (4), the pressing conditions are as follows: pressing is performed at room temperature and a pressure of 100 kg.

7. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (5), the secondary curing process is as follows: the metal resin composite grinding block cured in step (4) is taken out from the molding mold and placed in an oven, and kept at a temperature of 80-150℃ for 2-5 hours.

8. The metal-resin composite grinding block for processing calcium carbonate inorganic stone as described in claim 1, characterized in that, In step (5), the sharpening refers to removing the resin layer on the surface of the metal grinding block using a grinding wheel.

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