Manufacturing process of a resin horseshoe-shaped grinding tool

Abstract

The invention discloses a manufacturing process of a resin horseshoe-shaped grinding tool, comprising the following steps: stirring and mixing liquid resin and metal oxide filler to obtain a mixture; mixing the mixture with liquid resin, diamond powder and auxiliary abrasive powder to obtain molding powder; hot-pressing the molding powder at high temperature and demolding the powder to obtain diamond grinding particles; mixing liquid resin, a curing agent, a filler and the auxiliary abrasive powder to obtain a coating liquid; mixing the liquid resin, the curing agent and the filler to obtain a transition liquid; placing diamond grinding particles in a first grinding block molding cavity of a casting mold, pouring the coating liquid into the casting mold to immerse the diamond grinding particles, then filling a second grinding block molding cavity with the transition liquid, and curing and demolding after casting. Compared with the prior art, the resin horseshoe-shaped grinding tool obtained by the above process combines diamond with resin, thereby solving the problems of high cost and easy scratches on marble caused by diamond processing and short service life and poor grinding effect caused by resin processing.

Description

Technical Field

[0001] The invention relates to the field of grinding tools, and in particular to a manufacturing process of a resin horseshoe-shaped grinding tool. Background Art

[0002] The existing horseshoe-shaped grinding tool has a mounting seat and a grinding block fixed on one side of the mounting seat. The grinding block has a horseshoe-shaped structure. Most of these horseshoe-shaped grinding tools are divided into diamond grinding tools and resin grinding tools. Among them, the diamond grinding tool is integrally formed from metal powder. This type of diamond grinding tool has high sharpness, good grinding effect, and long service life, but the processing cost is high. At the same time, marble is relatively soft, and the diamond grinding tool is easy to scratch the edges and corners of marble during the grinding process.

[0003] Resin abrasives are made of phenolic resin cast in one piece. Although the processing cost of this resin abrasive is low, its sharpness is poor, the grinding effect is poor, it is not wear-resistant, and its service life is short. When used for marble grinding, it can generally only be used for four to five days, and it needs to be replaced frequently, resulting in high marble grinding costs.

[0004] In view of this, the inventor of this case conducted in-depth research on the problem, which led to the creation of this case. Summary of the Invention

[0005] The purpose of the present invention is to provide a manufacturing process for a resin horseshoe-shaped grinding tool, so as to solve the problems that the existing horseshoe-shaped grinding tool has high cost and easily scratches the edges and corners of marble when processed by diamond, and has short service life, poor grinding effect and high grinding cost when processed by resin.

[0006] In order to achieve the purpose, the present invention adopts such technical solution:

[0007] A manufacturing process of a resin horseshoe-shaped grinding tool is prepared by the following steps:

[0008] Step 1: preparing a mixture, stirring and mixing a liquid resin cured at room temperature and a metal oxide filler to obtain a mixture, wherein the liquid resin accounts for 60%-70% of the total weight of the mixture, and the metal oxide filler accounts for 30%-40% of the total weight of the mixture;

[0009] Step 2: Diamond grinding particle molding: the mixture of step 1 is mixed with liquid resin solidified at room temperature, diamond powder and auxiliary abrasive powder to obtain molding powder, the molding powder is poured into a mold, hot-pressed at high temperature and demolded to obtain columnar diamond grinding particles;

[0010] Step 3, preparing the casting material, mixing the liquid resin solidified at room temperature, the curing agent, the filler and the auxiliary abrasive powder together to obtain a coating liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the coating liquid, the curing agent accounts for 1%-5% of the total weight of the coating liquid, the filler accounts for 30%-40% of the total weight of the coating liquid, and the abrasive accounts for 20%-30% of the total weight of the coating liquid;

[0011] Mixing a liquid resin that cures at room temperature, a curing agent, and a filler to obtain a transition liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the transition liquid, the curing agent accounts for 1%-5% of the total weight of the transition liquid, and the filler accounts for 55%-65% of the total weight of the transition liquid;

[0012] Step 4: casting and molding. A number of diamond grinding particles from step 2 are placed upright in the first molding cavity for molding the grinding block of the horseshoe-shaped grinding tool in the casting mold. The diamond grinding particles are arranged at intervals. The coating liquid from step 3 is poured into the casting mold to immerse the grinding particles. Then, the transition liquid from step 3 is poured into the casting mold to fill the second molding cavity for the horseshoe-shaped grinding tool mounting seat. After casting is completed, it is cured at room temperature. After curing, the mold is demolded to obtain a resin horseshoe-shaped grinding tool composed of diamond and resin.

[0013] The liquid resins in the above steps 1, 2 and 3 are all epoxy resins, unsaturated resins or a mixture of epoxy resins and unsaturated resins.

[0014] The metal oxide filler is a mixture of zinc oxide and aluminum oxide.

[0015] The auxiliary abrasive powder in the above steps 2 and 3 is a mixture of silicon carbide, light calcium, gypsum powder and magnesium sulfate.

[0016] In the above step 3, the filler of the coating liquid and the filler of the transition liquid are both magnesium sulfate, stone powder or a mixture of magnesium sulfate and stone powder.

[0017] The mold in the above step 2 comprises an upper mold and a lower mold. The top surface of the lower mold is concave with a plurality of cylindrical holes arranged at intervals. The above upper mold has a compacting rod extending downward corresponding to each cylindrical hole and can fit tightly into the cylindrical hole. When the above molding material powder is hot-pressed at high temperature, the molding temperature of the upper mold is 160°C-200°C, the molding pressure of the upper mold is 16MPa-20MPa, and the pressing time of the upper mold is 30min-60min.

[0018] The above-mentioned casting mold is a hollow square box with an open top. The hollow chamber of the hollow square box has an upper chamber and a lower chamber connected up and down. The outer diameter of the upper chamber is larger than the inner diameter of the lower chamber. The bottom of the lower chamber is concave with several grooves for the ends of the diamond grinding particles to be embedded in. A partition plate is erected in the lower chamber to separate the lower chamber into a first grinding block molding chamber and a second grinding block molding chamber, and the top surface of the partition plate is flush with the bottom of the upper chamber. The partition plate is an arc-shaped plate. The two ends of the partition plate are respectively located on the two adjacent inner cavity walls of the lower chamber. The bottom of the first grinding block molding chamber and the bottom of the second grinding block molding chamber are both provided with the above-mentioned grooves. The lower chamber is the first molding chamber described in step four, and the upper chamber is the second molding chamber described in step four.

[0019] The inner cavity wall of the lower chamber includes a first inner cavity wall, a second inner cavity wall, a third inner cavity wall and a fourth inner cavity wall in sequence. The first inner cavity wall and the third inner cavity wall are arranged opposite to each other, and the second inner cavity wall and the fourth inner cavity wall are arranged opposite to each other. One end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber.

[0020] The first grinding block molding chamber is located at the corner of the lower chamber, and the above-mentioned groove is provided in the first grinding block molding chamber. The above-mentioned second grinding block molding chamber has a transverse molding chamber and a vertical molding chamber. The vertical molding chamber and the first grinding block molding chamber are arranged transversely apart through the above-mentioned partition plate. The vertical molding chamber and the first grinding block molding chamber are located on the same side of the transverse molding chamber. The bottom of the transverse molding chamber has two above-mentioned grooves along the same transverse arrangement direction of the vertical molding chamber and the first molding chamber, and the bottom of the vertical molding chamber has two above-mentioned grooves extending along the vertical direction of the vertical molding chamber.

[0021] The groove is circular, the diamond grinding particles are cylindrical, and the diamond grinding particles are within the groove, and the bottom surface of the diamond grinding particles is tightly matched with the bottom of the lower chamber.

[0022] The present invention provides a manufacturing process for a resin horseshoe-shaped grinding tool. The resin horseshoe-shaped grinding tool obtained by the above process combines diamond with resin, so that diamond grinding particles are embedded in a casting material with liquid resin. The use of diamond grinding particles can ensure the grinding effect of the resin horseshoe-shaped grinding tool, which is better than the grinding effect of a full-resin grinding tool. In the first molding chamber, the other parts outside the diamond grinding particles are coated with liquid with liquid resin, so that the side of the resin horseshoe-shaped grinding tool has a certain thickness, the service life is increased, the replacement frequency is greatly reduced, and the overall processing cost is greatly reduced; at the same time, the mounting seat of the resin horseshoe-shaped mold adopts a transition liquid with liquid resin as the material, so as to avoid scratches on the edges and corners of the marble during grinding, and effectively ensure the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the resin horseshoe-shaped grinding tool of the present invention. DETAILED DESCRIPTION

[0024] In order to further explain the technical solution of the present invention, it is described in detail below with reference to the accompanying drawings.

[0025] A process for manufacturing a resin horseshoe-shaped abrasive tool comprises the following steps: first, preparing a mixture, stirring and mixing a liquid resin solidified at room temperature and a metal oxide filler to obtain a mixture, wherein the liquid resin accounts for 60%-70% of the total weight of the mixture, and the metal oxide filler accounts for 30%-40% of the total weight of the mixture. Preferably, the metal oxide filler is a mixture of zinc oxide and aluminum oxide;

[0026] Step 2: forming diamond abrasive particles. The mixture of step 1 is mixed with liquid resin solidified at room temperature, diamond powder and auxiliary abrasive powder to obtain a molding powder. The molding powder is poured into a mold and hot-pressed at high temperature and demolded to obtain cylindrical one-piece high-temperature molded diamond abrasive particles. Specifically, the mold comprises an upper mold and a lower mold. The top surface of the lower mold is concave with a plurality of cylindrical holes arranged at intervals. The upper mold has a compacting rod extending downward corresponding to each cylindrical hole and capable of tightly fitting into the cylindrical hole. When the molding powder is hot-pressed at high temperature, the molding temperature of the upper mold is 160°C-200°C, the molding pressure of the upper mold is 16MPa-20MPa, and the pressing time of the upper mold is 30min-60min. The operation mode of the molding machine to mold diamond abrasive particles is well known to those skilled in the art and will not be elaborated herein.

[0027] Step 3, preparation of the casting material, mixing the liquid resin solidified at room temperature, the curing agent, the filler and the auxiliary abrasive powder together to obtain a coating liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the coating liquid, the curing agent accounts for 1%-5% of the total weight of the coating liquid, the filler accounts for 30%-40% of the total weight of the coating liquid, and the abrasive accounts for 20%-30% of the total weight of the coating liquid. Preferably, the auxiliary abrasive powders in the above steps 2 and 3 are a mixture of silicon carbide, light calcium, gypsum powder and magnesium sulfate;

[0028] A liquid resin that cures at room temperature, a curing agent, and a filler are mixed together to obtain a transition liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the transition liquid, the curing agent accounts for 1%-5% of the total weight of the transition liquid, and the filler accounts for 55%-65% of the total weight of the transition liquid. Preferably, the liquid resins in steps 1, 2, and 3 are all epoxy resins, unsaturated resins, or a mixture of epoxy resins and unsaturated resins, the filler in the coating liquid in step 3 and the filler in the transition liquid are both magnesium sulfate, stone powder, or a mixture of magnesium sulfate and stone powder, and the curing agent in the coating liquid and the curing agent in the transition liquid are both methyl ethyl ketone curing agent;

[0029] Step 4: casting and molding. A number of diamond grinding particles from step 2 are placed upright in the first molding cavity for molding the grinding block of the horseshoe-shaped grinding tool in the casting mold 1. The diamond grinding particles are arranged at intervals. The coating liquid from step 3 is poured into the casting mold 1 to immerse the diamond grinding particles. Then, the transition liquid from step 3 is poured into the casting mold 1 to fill the second molding cavity for the horseshoe-shaped grinding tool mounting seat. After casting, the resin horseshoe-shaped grinding tool composed of diamond and resin is obtained by demolding after curing.

[0030] The casting mold 1 is a hollow square box with an open top. Figure 1As shown, the hollow chamber of the hollow square box body has an upper chamber and a lower chamber connected to each other from top to bottom, and the outer diameter of the upper chamber is larger than the inner diameter of the lower chamber, that is, the casting mold 1 has a lower diameter reduction portion 11 and an upper diameter expansion portion 12, the lower diameter reduction portion 11 is a hollow rectangular box body open along the top surface, and the upper diameter expansion portion 12 is a rectangular structure penetrating along the top and bottom directions, the top surface of the lower diameter reduction portion 11 is connected to the inner side wall of the upper diameter expansion portion 12 in an arc-shaped transition, the hollow chamber of the upper diameter expansion portion 12 is the upper chamber, and the hollow chamber of the lower diameter reduction portion is the lower chamber, and a partition plate 2 is erected in the lower chamber to separate the lower chamber into a first grinding block molding chamber and a second grinding block molding chamber, the two ends of the partition plate 2 are respectively located on the two adjacent inner cavity walls of the lower chamber, and the top surface of the partition plate 2 is flush with the cavity bottom of the upper chamber, the partition plate 2 is an arc-shaped plate, and the end surfaces of the two ends of the partition plate 2 are respectively aligned with the two adjacent inner side walls of one group of the lower diameter reduction portions. Fitting; specifically, the inner cavity wall of the lower chamber has a first inner cavity wall, a second inner cavity wall, a third inner cavity wall and a fourth inner cavity wall in sequence, the first inner cavity wall and the third inner cavity wall are arranged opposite to each other, the second inner cavity wall and the fourth inner cavity wall are arranged opposite to each other, one end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber.

[0031] The bottom of the lower chamber is concavely provided with a plurality of inner grooves 100 for the ends of the diamond grinding particles to be embedded in. The grooves are circular, and the diamond grinding particles are cylindrical in structure, and the diamond grinding particles are within the range of the grooves. The bottom surface of the diamond grinding particles is tightly matched with the bottom of the lower chamber. The bottom of the first grinding block forming chamber and the bottom of the second grinding block forming chamber are both provided with the above-mentioned grooves 100. The lower chamber is the first grinding block forming chamber described in step four, and the upper chamber is the second grinding block forming chamber described in step four; specifically, the first grinding block forming chamber Located at the corner of the lower chamber, the first grinding block molding chamber is provided with the above-mentioned groove, the above-mentioned second grinding block molding chamber has a horizontal molding chamber and a vertical molding chamber, the vertical molding chamber and the first grinding block molding chamber are arranged horizontally with spacing through the above-mentioned partition plate 2, the vertical molding chamber and the first grinding block molding chamber are on the same side of the horizontal molding chamber, the bottom of the horizontal molding chamber has two above-mentioned grooves along the same horizontal arrangement direction of the vertical molding chamber and the first molding chamber, and the bottom of the vertical molding chamber has two above-mentioned grooves extending along the vertical direction of the vertical molding chamber. When used, the setting of the groove 100 allows the bottom surface of the diamond grinding particles to not be wrapped by the coating liquid, and the resin horseshoe-shaped grinding tool that is finally demolded can still exert its grinding effect at the position of the diamond grinding particles.

[0032] The present invention provides a manufacturing process for a resin horseshoe-shaped grinding tool. The resin horseshoe-shaped grinding tool obtained by the above process combines diamond with resin, so that diamond grinding particles are embedded in a casting material with liquid resin. Due to the effect of the groove, a portion of the bottom surface of the resin horseshoe-shaped grinding tool is still exposed with diamond grinding particles, thereby ensuring the grinding effect of the resin horseshoe-shaped grinding tool, which is better than the grinding effect of a full-resin grinding tool. In the first molding chamber, the other portion outside the diamond grinding particles is a coating liquid with liquid resin, so that the side of the resin horseshoe-shaped grinding tool has a certain thickness, thereby increasing the service life of the resin horseshoe-shaped grinding tool and greatly reducing the wear and tear of the resin horseshoe-shaped grinding tool. The replacement frequency is reduced, and the entire processing cost is greatly reduced; at the same time, the mounting base of the resin horseshoe-shaped mold is made of a casting material with liquid resin, which prevents the mold from scratching the edges and corners of the marble during the grinding process; furthermore, the setting of the first grinding block molding chamber and the second grinding block molding chamber divides the resin horseshoe-shaped mold into two grinding blocks of different sizes, and an arc distance is formed between the two grinding blocks, so that cooling water and stone debris can be quickly discharged during the grinding process. At the same time, the structural limitation of the partition plate and the position distribution of each groove can make the entire mold have a low processing cost and a service life of about 10 days while achieving the best grinding effect.

[0033] The product form of the present invention is not limited to the illustrations and embodiments of this case. Any appropriate changes or modifications made by anyone with similar ideas should be deemed to be within the patent scope of the present invention.

Claims

1. A process for manufacturing a resin horseshoe-shaped grinding tool, characterized by: Prepared by the following steps: Step 1: preparing a mixture by stirring and mixing a liquid resin cured at room temperature and a metal oxide filler to obtain a mixture, wherein the liquid resin accounts for 60%-70% of the total weight of the mixture, and the metal oxide filler accounts for 30%-40% of the total weight of the mixture; Step 2: Diamond grinding particle molding: the mixture of step 1 is mixed with liquid resin solidified at room temperature, diamond powder and auxiliary abrasive powder to obtain molding powder, the molding powder is poured into a mold, hot-pressed at high temperature and demolded to obtain columnar diamond grinding particles; Step 3: Preparation of casting material: Mixing liquid resin solidified at room temperature, curing agent, filler and auxiliary abrasive powder together to obtain coating liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the coating liquid, the curing agent accounts for 1%-5% of the total weight of the coating liquid, the filler accounts for 30%-40% of the total weight of the coating liquid, and the abrasive accounts for 20%-30% of the total weight of the coating liquid; Mixing a liquid resin that cures at room temperature, a curing agent, and a filler to obtain a transition liquid, wherein the liquid resin accounts for 35%-45% of the total weight of the transition liquid, the curing agent accounts for 1%-5% of the total weight of the transition liquid, and the filler accounts for 55%-65% of the total weight of the transition liquid; Step 4: Casting and molding: a plurality of diamond abrasive particles prepared in step 2 are placed vertically in a first molding cavity for forming a grinding block of a horseshoe-shaped abrasive tool in a casting mold, with the diamond abrasive particles arranged at intervals. The coating liquid prepared in step 3 is poured into the casting mold to immerse the diamond abrasive particles. Then, the transition liquid prepared in step 3 is poured into the casting mold to fill the second molding cavity for the horseshoe-shaped abrasive tool mounting seat. After casting, the mold is cured at room temperature. After curing, the mold is removed to obtain a resin horseshoe-shaped abrasive tool composed of diamond and resin. The above-mentioned casting mold is a hollow square box with an open top. The hollow chamber of the hollow square box has an upper chamber and a lower chamber connected up and down. The outer diameter of the upper chamber is larger than the inner diameter of the lower chamber. The bottom of the lower chamber is concave with several grooves for the ends of the diamond grinding particles to be embedded in. A partition plate is erected in the lower chamber to separate the lower chamber into a first grinding block molding chamber and a second grinding block molding chamber, and the top surface of the partition plate is flush with the bottom of the upper chamber. The partition plate is an arc-shaped plate. The two ends of the partition plate are respectively located on the two adjacent inner cavity walls of the lower chamber. The bottom of the first grinding block molding chamber and the bottom of the second grinding block molding chamber are both provided with the above-mentioned grooves. The lower chamber is the first molding chamber described in step four, and the upper chamber is the second molding chamber described in step four.

2. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: The liquid resins in the above steps 1, 2 and 3 are all epoxy resins, unsaturated resins or a mixture of epoxy resins and unsaturated resins.

3. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: The metal oxide filler is a mixture of zinc oxide and aluminum oxide.

4. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: The auxiliary abrasive powder in the above steps 2 and 3 is a mixture of silicon carbide, light calcium, gypsum powder and magnesium sulfate.

5. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: In the above step 3, the filler of the coating liquid and the filler of the transition liquid are both magnesium sulfate, stone powder or a mixture of magnesium sulfate and stone powder.

6. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: The mold in the above step 2 comprises an upper mold and a lower mold. The top surface of the lower mold is concave with a plurality of cylindrical holes arranged at intervals. The above upper mold has a compacting rod extending downward corresponding to each cylindrical hole and can fit tightly into the cylindrical hole. When the above molding material powder is hot-pressed at high temperature, the molding temperature of the upper mold is 160°C-200°C, the molding pressure of the upper mold is 16MPa-20MPa, and the pressing time of the upper mold is 30min-60min.

7. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 1, characterized in that: The inner cavity wall of the lower chamber includes a first inner cavity wall, a second inner cavity wall, a third inner cavity wall and a fourth inner cavity wall in sequence. The first inner cavity wall and the third inner cavity wall are arranged opposite to each other, and the second inner cavity wall and the fourth inner cavity wall are arranged opposite to each other. One end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the second inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the third inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, or one end of the partition plate is in the middle part of the fourth inner cavity wall of the lower chamber, and the other end of the partition plate is in the middle part of the first inner cavity wall of the lower chamber.

8. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 7, characterized in that: The first grinding block molding chamber is located at the corner of the lower chamber, and the above-mentioned groove is provided in the first grinding block molding chamber. The above-mentioned second grinding block molding chamber has a transverse molding chamber and a vertical molding chamber. The vertical molding chamber and the first grinding block molding chamber are arranged transversely apart through the above-mentioned partition plate. The vertical molding chamber and the first grinding block molding chamber are located on the same side of the transverse molding chamber. The bottom of the transverse molding chamber has two above-mentioned grooves along the same transverse arrangement direction of the vertical molding chamber and the first molding chamber, and the bottom of the vertical molding chamber has two above-mentioned grooves extending along the vertical direction of the vertical molding chamber.

9. The process for manufacturing a resin horseshoe-shaped grinding tool according to claim 8, characterized in that: The groove is circular, the diamond grinding particles are cylindrical, the diamond grinding particles are integrally formed at high temperature, and the diamond grinding particles are within the groove range, and the bottom surface of the diamond grinding particles is tightly matched with the bottom of the lower chamber.

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