A new type of inorganic polymer mineral polymerization adhesive
2022-09-30 14:06:17
I. Introduction of inorganic polymer mineral polymerization adhesive
Inorganic Polymer Mineral Polymer Adhesive is a new type of inorganic polymer binder developed and produced by Xi'an Deqian Technology Co., Ltd., and the concept of “hybridization†was implanted into the abrasive manufacturing industry for the first time, which completely changed the high energy consumption in the production of abrasive tools. The backward production process and material structure of heavy pollution have greatly improved the level of abrasive use and product quality. At the same time, it also provides a broad space for the expansion of new products.
Inorganic polymer mineral polymerization adhesives have the following outstanding features in the abrasive industry:
1. High quality and high energy: inorganic synthesis, stable chemical properties, long service life, strong adhesion, high strength, abrasion resistance, corrosion resistance, high temperature resistance and small thermal expansion coefficient; the material not only has the characteristics of inorganic materials, but also has The characteristics of certain organic materials break the boundaries between traditional ceramic abrasives and resin abrasives.
2, energy saving and environmental protection: inorganic polymer mineral polymerization adhesive in the production and use of abrasive tools without toxic and harmful gases, the adhesive curing stability only needs 120-180 ° C (depending on the type of abrasive tools to determine the temperature; curing The time is 18-24 hours), which greatly saves energy and significantly improves production efficiency.
3. The inorganic polymer mineral polymerization adhesive forms a three-dimensional network structure with a covalent bond and an ionic bond, and the fracture energy is up to 1500 J/m2, which can satisfy the high-speed rotation of the abrasive tool. Under the action of centrifugal force, the abrasive tool does not have the requirement of cracking strength; the adhesive can produce super soft abrasives, ordinary abrasive tools, and can produce super-hard and ultra-high-speed abrasive tools.
After the actual test, the ordinary grinding tool produced by the adhesive has a rotation speed of more than 130m/s; the super soft abrasive produced can also withstand high-speed rotation; because of its low curing temperature, the production process is changed by the concept of "hybridization". Production of high-speed grinding tools above 250m / s.
4. Unique function: Inorganic polymer mineral polymerization adhesive can produce fine grinding abrasive. Since the structure of the material contains aluminum-oxygen tetrahedron, during the grinding process, this part of the aluminum-oxygen tetrahedron has lubrication effect, so that the surface of the workpiece The finish is excellent.
5. The use of inorganic polymer mineral polymerization adhesives to produce abrasive tools is basically the same as the traditional production process and equipment, without the need for large technological transformation investment.
Second, the application of inorganic polymer mineral polymer adhesive in abrasive
As a branch of chemistry, polymer chemistry is also the science of manufacturing and researching molecules, but its manufacturing and research are all macromolecules, that is, several atoms are repeatedly connected in a certain pattern to have thousands or even hundreds. A long-chain molecule of a mass of up to a millimeter in length, called a polymer, macromolecule or polymer. Since polymer chemistry is the science of manufacturing and studying macromolecules, the study of the reaction and method of manufacturing macromolecules is clearly the most basic research content of polymer chemistry. The word hybrid comes from biology—the species advantage of different species after hybridization is the root of natural evolution. The advantages of different materials complement each other to produce new materials, and the greater the difference in material properties, the more obvious the advantages of hybridization. Modifications from different organic/inorganic resins to organic/inorganic hybrid materials, from molecular structures to nanostructures to blends and composites.
The chemical composition of the inorganic polymer mineral polymeric adhesive is a polymeric aluminosilicate, the polymer of which is polycondensed into a polymer, has a high degree of polymerization, and is completely composed of a chain of Si, Al, O or the like through a covalent bond or an ionic bond. Compared with the ceramic material, the structure of the inorganic polymer material is a continuous three-dimensional network frame composed of a cyclic chain, and has two structures of "crystal-like" and "glassy state", and there is no complete crystal and crystal. Boundary. The properties of the material are derived from the (-Si-O-Al-O-)n skeleton; in addition, the final product of the inorganic mineral reaction is a silicon-oxygen tetrahedron and an aluminum-oxygen tetrahedron mainly composed of ionic bonds and covalent bonds. The polymer has a bond structure of an organic polymer, and the inorganic polymer adhesive has the common characteristics of an organic compound and an inorganic compound. Its performance is similar to or higher than ceramics.
Inorganic polymeric mineral polymeric adhesives are characterized by "hybrid bonding" because, although they have certain characteristics of glassy, ​​ceramic-based and organic binders, they are still different, in terms of preparing bonded abrasive articles, they are Conventional glassy, ​​ceramic based adhesives have significant advantages. First of all, they are important at lower temperatures than glass-based, ceramic-based adhesives (this is the same as organic binders), and have a uniform composition, in contrast to glass. The ceramic-based binder must be formed at its melting temperature and maintained at this temperature so that it flows to cover the abrasive particles to form a bond. However, the structure of the inorganic polymeric mineral polymeric adhesive has a glass-state, ceramic-based bond with high strength and hardness even higher. In this regard, they differ from conventional organic binders, which may be thermosetting resins such as phenol/formaldehyde, urea/formaldehyde or epoxy resins; or radiation curable resins such as acrylated Polyurethane, acrylated epoxy resin, acrylated polyester or several of these compounds, which form a high degree of cross-linking under visible light, ultraviolet light or electron beam radiation without or with catalyst activation and enhanced conversion. Rigid polymer. The conventional organic binder has a small modulus and a large brittleness. Therefore, from the viewpoint of the lower formation temperature of the inorganic polymer mineral polymerization adhesive in the abrasive production, the inorganic polymer mineral polymerization adhesive is used instead of the conventional glass state and ceramic. Base adhesives, due to the lower processing temperatures, are capable of employing a number of advanced techniques, such as the addition of active fillers which are not used in glassy, ​​ceramic-based bonded articles to such adhesives. The inorganic polymeric mineral polymeric binder system can be modified by the addition of active fillers, such as pyrite, alumina, sulfur or organic grinding aids, as long as they are stable at the temperatures formed, or inorganic fillers, for example Mineral pigments or glass, ceramic microspheres whose primary purpose is to aid in the formation of the desired pores or structures in the final bonded abrasive article, preferably from 5 to 10% filler.
Secondly, in addition to these advantages, the abrasive product of the inorganic polymer mineral polymeric adhesive has the advantages of high thermal stability and high use temperature compared with the organic adhesive product; in addition, the abrasive product of the inorganic polymer mineral polymer adhesive The heat treatment temperature is low, and at this temperature, the general thermoplastic organic resin is not modified or degraded, so that some brittleness related to the glassy state and the ceramic-based bonding can be changed by adding some organic polymers. Moderately; and because inorganic polymer mineral polymer adhesives are different from glass-based and ceramic-based adhesives, they can be crosslinked at temperatures that do not degrade thermoplastic polymers. Therefore, inorganic polymeric mineral polymeric adhesives can be added. Suitable reinforced or modified thermoplastic polymers, including organics such as polyolefins, polybutadiene, polyvinyl chloride, polytetrafluoroethylene, polyimides, and polyesters, which are added to the binder and enhanced The amount of modified thermoplastic polymer is up to 20% of the total amount of inorganic binder, so that it can be tailored according to the needs of the product to be used. Physical properties of the adhesive, and therefore, the use of inorganic polymer geopolymer adhesive material in the abrasive article is really a "hybrid" of.
At present, abrasive abrasives produced with inorganic high molecular polymers at lower temperatures have rarely been found. This application not only opens up the possibility of application of glassy, ​​ceramic-based bonded abrasive products and resin-based bonded abrasive products, but also The performance of the bonded abrasive article is also improved, and the high performance, low loss abrasive product can be obtained by changing the bonding of the adhesive, the control of the temperature profile, and the adjustment of the production process.
In short, the use of "hybrid" in inorganic polymeric mineral polymeric adhesives cannot be properly classified into glassy, ​​ceramic or organic binder types. Glassy, ​​ceramic based materials, as the name implies, need to be melted and The flow can cover the abrasive grains to form a bond body connecting the adjacent abrasive grains, and the structures are combined after cooling and solidification. Therefore, the glassy state, the ceramic-based adhesive material is formed at a high temperature and formed for a long time. However, such articles are very rigid and are particularly effective in precision grinding, where organically bonded materials are formed at much lower temperatures, while inorganic polymeric mineral polymer adhesives have the common advantages of both and can be lower The polymer material formed at the temperature and hardened by the cross-linking has the common advantages of both products, which provides the necessary preconditions for the development of new abrasive products in the future.
Third, the importance of inorganic polymer mineral polymerization adhesive in the application of grinding wheel
Inorganic polymer mineral polymeric adhesives have three basic effects of “morphological effectâ€, “active effect†and “micro-aggregate effect†in the application of grinding wheel.
The so-called morphological effect refers to the effects of various abrasive grains used in the production of grinding wheels, such as the appearance, internal structure, surface properties, particle gradation and other physical properties of the particles.
The so-called active effect refers to the chemical effect produced by the active component between the inorganic polymeric mineral polymeric binder and the abrasive admixture.
The so-called micro-aggregate effect refers to the uniform distribution of the inorganic polymer mineral polymeric binder in the base phase of the abrasive, just like the fine aggregate, to improve the structure and properties of the blended mixture.
In fact, the above three basic effects are the forms of action of the aqueous inorganic mineral polymeric binder blended in the abrasive, not only for abrasives, but also for other mineral admixtures, the difference being only the extent of the effect. The active effect is an important component of the action of the blended abrasive in the grinding wheel. Inorganic mineral polymeric adhesives can be used in grinding wheels because of their reactivity and the formation of ceramic-like products that improve the structure of the grinding wheel material. Needless to say, the active effect is an important aspect of the contribution of inorganic mineral polymeric binder admixture to the performance of the grinding wheel material. The activity effect is the basic guarantee for the micro-aggregate effect. The micro-aggregate effect of inorganic mineral polymeric adhesives and abrasives comes from three aspects: one is that these abrasive particles themselves have higher strength; the other is that these abrasive particles have better bonding properties with hydration products; These abrasive particles are well dispersed in the inorganic mineral polymeric binder and contribute to the filling and "refinement" of the pores in the abrasive by means of reasonable agitation, heating, and improved uniformity of the abrasive. Among them, the good adhesion between the abrasive particles and the inorganic mineral polymeric adhesive is the basis of the other two. Only when the abrasive micro-aggregate particles and the inorganic mineral polymeric adhesive have a uniform and tightly bonded structure, its higher self-strength can play a role, so that the effect of voiding can be realized. Only under this premise can its superior performance be utilized and played. The interfacial reaction of abrasive particles is an important way to improve the interface properties. Therefore, the active effect of the inorganic mineral polymeric adhesive is the premise and guarantee of the micro-aggregate effect. The activity effect is a continuation of the effect of the morphological effect. The morphological effect of the abrasive only determines the initial structure of the inorganic mineral polymeric binder material without mixing. As the abrasive and inorganic mineral polymeric binder admixtures are subjected to various reactions under a reasonable process of stirring and heating, the blended material can be made. The structure is further improved, and the extent and speed of these reactions depends on its activity. From the perspective of its effect, the active effect is the continuation and development of the morphological effect, which further improves the performance of the admixture. It can be seen that how to fully exploit the active potential of abrasive and inorganic mineral polymeric binder blends during the control of the production process is of particular importance for product performance. At the same time, it should also be noted that the role of abrasive and inorganic mineral polymeric binder admixtures in the production of grinding wheels is composed of three effects. For this reason, the potential of the active effect can be exploited only under a reasonable process. It also takes into account other effects.
Fourth, the process points of inorganic polymer mineral polymerization adhesive in the production process of grinding wheel
1. Weigh the abrasives, adhesives, fillers (wollastonite powder) and additives (honey or brown sugar) according to the formula; the additives can be added without adding the additives, just add to the adhesive and mix well.
2. After mixing the abrasive and the filler in the mixing pot, add the mixture of the adhesive and the auxiliary agent, stir evenly and then heat the air to stir.
3, the hot air temperature is controlled at about 70 °C, the air volume is adjusted according to the size of the industrial production and the stirring speed. The speed is adjusted according to the amount of the resin adhesive. It is better to not produce particles; the hot air is stirred until the agglomeration After 3 to 5 minutes after drawing, the hot air is stopped, and stirring is continued until the abrasive grains are dispersed.
(Note: When the final temperature of the adhesive is 110-130 °C, the finished grinding wheel is hard and tough, replacing the traditional resin grinding wheel; when the final temperature is 120-150 °C, the finished grinding wheel is hard, and the performance is between the ceramic grinding wheel and the resin grinding wheel; The temperature is 150-180 ° C, and the finished grinding wheel is hard and brittle, replacing the ceramic grinding wheel.)
4. Heating reference curve for replacing resin abrasive: after holding at 50 °C for 2 hours, heating to 70 °C for 1 hour, heating to 90 °C for 2 hours after holding for 5 hours, heating to 130 °C for 3 hours after holding for 3 hours, keeping warm 3 After a few hours, it naturally cools down.
Alternative heating reference curve for ceramic abrasives:
After incubating at 50 ° C for 2 hours, the temperature was raised to 70 ° C for 1 hour, the temperature was raised to 90 ° C for 2 hours after the heat retention for 5 hours, and the temperature was raised to 120 ° C for 3 hours after the heat retention for 3 hours. After 3 hours of heat preservation, the temperature was raised to 150-180 ° C for 3 hours. After 3 hours of heat preservation, it naturally cools down.
Inorganic Polymer Mineral Polymer Adhesive is a new type of inorganic polymer binder developed and produced by Xi'an Deqian Technology Co., Ltd., and the concept of “hybridization†was implanted into the abrasive manufacturing industry for the first time, which completely changed the high energy consumption in the production of abrasive tools. The backward production process and material structure of heavy pollution have greatly improved the level of abrasive use and product quality. At the same time, it also provides a broad space for the expansion of new products.
Inorganic polymer mineral polymerization adhesives have the following outstanding features in the abrasive industry:
1. High quality and high energy: inorganic synthesis, stable chemical properties, long service life, strong adhesion, high strength, abrasion resistance, corrosion resistance, high temperature resistance and small thermal expansion coefficient; the material not only has the characteristics of inorganic materials, but also has The characteristics of certain organic materials break the boundaries between traditional ceramic abrasives and resin abrasives.
2, energy saving and environmental protection: inorganic polymer mineral polymerization adhesive in the production and use of abrasive tools without toxic and harmful gases, the adhesive curing stability only needs 120-180 ° C (depending on the type of abrasive tools to determine the temperature; curing The time is 18-24 hours), which greatly saves energy and significantly improves production efficiency.
3. The inorganic polymer mineral polymerization adhesive forms a three-dimensional network structure with a covalent bond and an ionic bond, and the fracture energy is up to 1500 J/m2, which can satisfy the high-speed rotation of the abrasive tool. Under the action of centrifugal force, the abrasive tool does not have the requirement of cracking strength; the adhesive can produce super soft abrasives, ordinary abrasive tools, and can produce super-hard and ultra-high-speed abrasive tools.
After the actual test, the ordinary grinding tool produced by the adhesive has a rotation speed of more than 130m/s; the super soft abrasive produced can also withstand high-speed rotation; because of its low curing temperature, the production process is changed by the concept of "hybridization". Production of high-speed grinding tools above 250m / s.
4. Unique function: Inorganic polymer mineral polymerization adhesive can produce fine grinding abrasive. Since the structure of the material contains aluminum-oxygen tetrahedron, during the grinding process, this part of the aluminum-oxygen tetrahedron has lubrication effect, so that the surface of the workpiece The finish is excellent.
5. The use of inorganic polymer mineral polymerization adhesives to produce abrasive tools is basically the same as the traditional production process and equipment, without the need for large technological transformation investment.
Second, the application of inorganic polymer mineral polymer adhesive in abrasive
As a branch of chemistry, polymer chemistry is also the science of manufacturing and researching molecules, but its manufacturing and research are all macromolecules, that is, several atoms are repeatedly connected in a certain pattern to have thousands or even hundreds. A long-chain molecule of a mass of up to a millimeter in length, called a polymer, macromolecule or polymer. Since polymer chemistry is the science of manufacturing and studying macromolecules, the study of the reaction and method of manufacturing macromolecules is clearly the most basic research content of polymer chemistry. The word hybrid comes from biology—the species advantage of different species after hybridization is the root of natural evolution. The advantages of different materials complement each other to produce new materials, and the greater the difference in material properties, the more obvious the advantages of hybridization. Modifications from different organic/inorganic resins to organic/inorganic hybrid materials, from molecular structures to nanostructures to blends and composites.
The chemical composition of the inorganic polymer mineral polymeric adhesive is a polymeric aluminosilicate, the polymer of which is polycondensed into a polymer, has a high degree of polymerization, and is completely composed of a chain of Si, Al, O or the like through a covalent bond or an ionic bond. Compared with the ceramic material, the structure of the inorganic polymer material is a continuous three-dimensional network frame composed of a cyclic chain, and has two structures of "crystal-like" and "glassy state", and there is no complete crystal and crystal. Boundary. The properties of the material are derived from the (-Si-O-Al-O-)n skeleton; in addition, the final product of the inorganic mineral reaction is a silicon-oxygen tetrahedron and an aluminum-oxygen tetrahedron mainly composed of ionic bonds and covalent bonds. The polymer has a bond structure of an organic polymer, and the inorganic polymer adhesive has the common characteristics of an organic compound and an inorganic compound. Its performance is similar to or higher than ceramics.
Inorganic polymeric mineral polymeric adhesives are characterized by "hybrid bonding" because, although they have certain characteristics of glassy, ​​ceramic-based and organic binders, they are still different, in terms of preparing bonded abrasive articles, they are Conventional glassy, ​​ceramic based adhesives have significant advantages. First of all, they are important at lower temperatures than glass-based, ceramic-based adhesives (this is the same as organic binders), and have a uniform composition, in contrast to glass. The ceramic-based binder must be formed at its melting temperature and maintained at this temperature so that it flows to cover the abrasive particles to form a bond. However, the structure of the inorganic polymeric mineral polymeric adhesive has a glass-state, ceramic-based bond with high strength and hardness even higher. In this regard, they differ from conventional organic binders, which may be thermosetting resins such as phenol/formaldehyde, urea/formaldehyde or epoxy resins; or radiation curable resins such as acrylated Polyurethane, acrylated epoxy resin, acrylated polyester or several of these compounds, which form a high degree of cross-linking under visible light, ultraviolet light or electron beam radiation without or with catalyst activation and enhanced conversion. Rigid polymer. The conventional organic binder has a small modulus and a large brittleness. Therefore, from the viewpoint of the lower formation temperature of the inorganic polymer mineral polymerization adhesive in the abrasive production, the inorganic polymer mineral polymerization adhesive is used instead of the conventional glass state and ceramic. Base adhesives, due to the lower processing temperatures, are capable of employing a number of advanced techniques, such as the addition of active fillers which are not used in glassy, ​​ceramic-based bonded articles to such adhesives. The inorganic polymeric mineral polymeric binder system can be modified by the addition of active fillers, such as pyrite, alumina, sulfur or organic grinding aids, as long as they are stable at the temperatures formed, or inorganic fillers, for example Mineral pigments or glass, ceramic microspheres whose primary purpose is to aid in the formation of the desired pores or structures in the final bonded abrasive article, preferably from 5 to 10% filler.
Secondly, in addition to these advantages, the abrasive product of the inorganic polymer mineral polymeric adhesive has the advantages of high thermal stability and high use temperature compared with the organic adhesive product; in addition, the abrasive product of the inorganic polymer mineral polymer adhesive The heat treatment temperature is low, and at this temperature, the general thermoplastic organic resin is not modified or degraded, so that some brittleness related to the glassy state and the ceramic-based bonding can be changed by adding some organic polymers. Moderately; and because inorganic polymer mineral polymer adhesives are different from glass-based and ceramic-based adhesives, they can be crosslinked at temperatures that do not degrade thermoplastic polymers. Therefore, inorganic polymeric mineral polymeric adhesives can be added. Suitable reinforced or modified thermoplastic polymers, including organics such as polyolefins, polybutadiene, polyvinyl chloride, polytetrafluoroethylene, polyimides, and polyesters, which are added to the binder and enhanced The amount of modified thermoplastic polymer is up to 20% of the total amount of inorganic binder, so that it can be tailored according to the needs of the product to be used. Physical properties of the adhesive, and therefore, the use of inorganic polymer geopolymer adhesive material in the abrasive article is really a "hybrid" of.
At present, abrasive abrasives produced with inorganic high molecular polymers at lower temperatures have rarely been found. This application not only opens up the possibility of application of glassy, ​​ceramic-based bonded abrasive products and resin-based bonded abrasive products, but also The performance of the bonded abrasive article is also improved, and the high performance, low loss abrasive product can be obtained by changing the bonding of the adhesive, the control of the temperature profile, and the adjustment of the production process.
In short, the use of "hybrid" in inorganic polymeric mineral polymeric adhesives cannot be properly classified into glassy, ​​ceramic or organic binder types. Glassy, ​​ceramic based materials, as the name implies, need to be melted and The flow can cover the abrasive grains to form a bond body connecting the adjacent abrasive grains, and the structures are combined after cooling and solidification. Therefore, the glassy state, the ceramic-based adhesive material is formed at a high temperature and formed for a long time. However, such articles are very rigid and are particularly effective in precision grinding, where organically bonded materials are formed at much lower temperatures, while inorganic polymeric mineral polymer adhesives have the common advantages of both and can be lower The polymer material formed at the temperature and hardened by the cross-linking has the common advantages of both products, which provides the necessary preconditions for the development of new abrasive products in the future.
Third, the importance of inorganic polymer mineral polymerization adhesive in the application of grinding wheel
Inorganic polymer mineral polymeric adhesives have three basic effects of “morphological effectâ€, “active effect†and “micro-aggregate effect†in the application of grinding wheel.
The so-called morphological effect refers to the effects of various abrasive grains used in the production of grinding wheels, such as the appearance, internal structure, surface properties, particle gradation and other physical properties of the particles.
The so-called active effect refers to the chemical effect produced by the active component between the inorganic polymeric mineral polymeric binder and the abrasive admixture.
The so-called micro-aggregate effect refers to the uniform distribution of the inorganic polymer mineral polymeric binder in the base phase of the abrasive, just like the fine aggregate, to improve the structure and properties of the blended mixture.
In fact, the above three basic effects are the forms of action of the aqueous inorganic mineral polymeric binder blended in the abrasive, not only for abrasives, but also for other mineral admixtures, the difference being only the extent of the effect. The active effect is an important component of the action of the blended abrasive in the grinding wheel. Inorganic mineral polymeric adhesives can be used in grinding wheels because of their reactivity and the formation of ceramic-like products that improve the structure of the grinding wheel material. Needless to say, the active effect is an important aspect of the contribution of inorganic mineral polymeric binder admixture to the performance of the grinding wheel material. The activity effect is the basic guarantee for the micro-aggregate effect. The micro-aggregate effect of inorganic mineral polymeric adhesives and abrasives comes from three aspects: one is that these abrasive particles themselves have higher strength; the other is that these abrasive particles have better bonding properties with hydration products; These abrasive particles are well dispersed in the inorganic mineral polymeric binder and contribute to the filling and "refinement" of the pores in the abrasive by means of reasonable agitation, heating, and improved uniformity of the abrasive. Among them, the good adhesion between the abrasive particles and the inorganic mineral polymeric adhesive is the basis of the other two. Only when the abrasive micro-aggregate particles and the inorganic mineral polymeric adhesive have a uniform and tightly bonded structure, its higher self-strength can play a role, so that the effect of voiding can be realized. Only under this premise can its superior performance be utilized and played. The interfacial reaction of abrasive particles is an important way to improve the interface properties. Therefore, the active effect of the inorganic mineral polymeric adhesive is the premise and guarantee of the micro-aggregate effect. The activity effect is a continuation of the effect of the morphological effect. The morphological effect of the abrasive only determines the initial structure of the inorganic mineral polymeric binder material without mixing. As the abrasive and inorganic mineral polymeric binder admixtures are subjected to various reactions under a reasonable process of stirring and heating, the blended material can be made. The structure is further improved, and the extent and speed of these reactions depends on its activity. From the perspective of its effect, the active effect is the continuation and development of the morphological effect, which further improves the performance of the admixture. It can be seen that how to fully exploit the active potential of abrasive and inorganic mineral polymeric binder blends during the control of the production process is of particular importance for product performance. At the same time, it should also be noted that the role of abrasive and inorganic mineral polymeric binder admixtures in the production of grinding wheels is composed of three effects. For this reason, the potential of the active effect can be exploited only under a reasonable process. It also takes into account other effects.
Fourth, the process points of inorganic polymer mineral polymerization adhesive in the production process of grinding wheel
1. Weigh the abrasives, adhesives, fillers (wollastonite powder) and additives (honey or brown sugar) according to the formula; the additives can be added without adding the additives, just add to the adhesive and mix well.
2. After mixing the abrasive and the filler in the mixing pot, add the mixture of the adhesive and the auxiliary agent, stir evenly and then heat the air to stir.
3, the hot air temperature is controlled at about 70 °C, the air volume is adjusted according to the size of the industrial production and the stirring speed. The speed is adjusted according to the amount of the resin adhesive. It is better to not produce particles; the hot air is stirred until the agglomeration After 3 to 5 minutes after drawing, the hot air is stopped, and stirring is continued until the abrasive grains are dispersed.
(Note: When the final temperature of the adhesive is 110-130 °C, the finished grinding wheel is hard and tough, replacing the traditional resin grinding wheel; when the final temperature is 120-150 °C, the finished grinding wheel is hard, and the performance is between the ceramic grinding wheel and the resin grinding wheel; The temperature is 150-180 ° C, and the finished grinding wheel is hard and brittle, replacing the ceramic grinding wheel.)
4. Heating reference curve for replacing resin abrasive: after holding at 50 °C for 2 hours, heating to 70 °C for 1 hour, heating to 90 °C for 2 hours after holding for 5 hours, heating to 130 °C for 3 hours after holding for 3 hours, keeping warm 3 After a few hours, it naturally cools down.
Alternative heating reference curve for ceramic abrasives:
After incubating at 50 ° C for 2 hours, the temperature was raised to 70 ° C for 1 hour, the temperature was raised to 90 ° C for 2 hours after the heat retention for 5 hours, and the temperature was raised to 120 ° C for 3 hours after the heat retention for 3 hours. After 3 hours of heat preservation, the temperature was raised to 150-180 ° C for 3 hours. After 3 hours of heat preservation, it naturally cools down.
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