CN108908145B - Polishing abrasive belt and preparation method thereof - Google Patents

Polishing abrasive belt and preparation method thereof Download PDF

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Publication number
CN108908145B
CN108908145B CN201810707226.3A CN201810707226A CN108908145B CN 108908145 B CN108908145 B CN 108908145B CN 201810707226 A CN201810707226 A CN 201810707226A CN 108908145 B CN108908145 B CN 108908145B
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CN
China
Prior art keywords
epoxy resin
weight
base
abrasive belt
sand
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CN201810707226.3A
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Chinese (zh)
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CN108908145A (en
Inventor
吕凤鸣
杜怀玉
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河南烨达新材科技股份有限公司
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Publication of CN108908145A publication Critical patent/CN108908145A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING, OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials

Abstract

The invention discloses a polishing abrasive belt and a preparation method thereof, wherein the polishing abrasive belt comprises a belt-shaped base material, modified epoxy resin poured in the base material and black corundum abrasive material uniformly distributed in the modified epoxy resin; wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360; the base material is industrial scouring pad made of nylon; the modified epoxy resin is prepared from the following raw materials: the epoxy resin-modified polyurethane adhesive comprises epoxy resin, a curing agent, a modifier and a viscosity regulator, wherein the curing agent is polyamide, and the modifier is polybutadiene. The preparation method comprises the steps of epoxy resin modification, blending, grouting and curing. The abrasive belt has high sand content, abrasive grains distributed in the whole base material rather than on the surface, no need of repeatedly coating adhesive and adhering sand, long service life, low cost and high performance-price ratio.

Description

Polishing abrasive belt and preparation method thereof

Technical Field

The invention relates to the technical field of polishing abrasive tools, in particular to a polishing abrasive belt and a preparation method thereof.

Background

The black corundum is prepared by using high-alumina bauxite and high-iron bauxite or iron oxide scrap iron to perform high-temperature smelting in an electric arc furnace and then cooling, thereby preparing the Al-based corundum2O3And gray-black crystals of spinel as main mineral phase. The main chemical component of the aluminum oxide is aluminum oxide (Al)2O3) Iron oxide (Fe)2O3) And, in addition, a portion of silicon dioxide (SiO)2) Titanium dioxide (TiO)2) And other ingredients. The black corundum production process determines that the production power consumption is lower than that of brown corundum, the emission is less, and the black corundum abrasive is an environment-friendly abrasive product with high cost performance. The black corundum abrasive is mainly used for surface treatment of various workpieces such as sand blasting, grinding, polishing and the like, particularly has unique advantages on polishing of stainless steel workpieces, the surface of the stainless steel workpieces polished by the black corundum has uniform and consistent color, the stainless steel workpieces show the intrinsic luster of the stainless steel, no burn marks exist, and the polished products have excellent brightness and color.

The polishing of current stainless steel product generally adopts the cloth wheel as the substrate, at cloth wheel outer fringe rubber coating, the polishing wheel is made to the sand that glues, and the abrasive material granule glues in cloth wheel outer fringe surface, and when using, the abrasive material is worn and torn easily, drops, and at this moment the emery wheel just need glue again, the sand that glues just can continue to use, and this work efficiency that just causes the emery wheel is low, stability is low, causes easily that the polishing is inhomogeneous, and it is with high costs to glue repeatedly, and the glue that just makes up as the bonding agent usually has pungent smell, is unfavorable for staff's health. Some industries also adopt abrasive belts to grind and polish, but the used abrasive belts are used for carrying out electrostatic sand planting on the surface of a base material, the sand content is only one layer of sand on the surface, the sand is easy to fall off in the grinding process, the abrasive belts are scrapped after the sand on the surface layer falls off, the sand planting cannot be repeated, the durability of the abrasive belts is very low, and the service life is very short.

Disclosure of Invention

The invention aims to provide a polishing abrasive belt with high sand content and more stable performance and a preparation method thereof.

In order to solve the technical problems, the invention adopts the following technical scheme:

designing a polishing abrasive belt, which comprises a base material, modified epoxy resin poured in the base material, and black corundum sand material uniformly distributed in the modified epoxy resin; wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360; the base material is industrial scouring pad made of nylon;

the modified epoxy resin is prepared from the following raw materials: the epoxy resin modified polyurethane comprises epoxy resin, a curing agent, a modifier and a viscosity regulator, wherein the curing agent is polyamide, the addition amount of the curing agent is 20-50% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 5-10% of the weight of the epoxy resin.

According to the technical scheme, the black corundum sand material is uniformly mixed in the modified epoxy resin, and then the mixed sand material is poured into the base material, so that the black corundum sand material is uniformly distributed inside the whole base material instead of being adhered to the surface of the base material, repeated gluing and sand adhering in the using process like the existing polishing grinding wheel are not needed, a large number of operation procedures are saved, the stability of the working performance of the abrasive belt is ensured, the polishing efficiency is improved, and the polishing uniformity is better. The industrial scouring pad is made of nylon materials, the porosity is high, the sand content of a unit area can be improved, fibers of the base material can be worn and consumed along with sand materials in the polishing process, the sand materials on the inner layer can be exposed after the outer layer of the base material is worn, and the polishing effect cannot be influenced due to the fact that the surface of the base material is worn and falls off. The polybutadiene modifier is added into the epoxy resin, so that the flexibility of the resin can be improved, and the resin sand mixture can be conveniently poured into the base material. The addition of the polyamide curing agent can enhance the elasticity, toughness and cohesiveness of the epoxy resin, ensure the required elasticity and strength of the polishing abrasive belt and improve the durability of the abrasive belt.

Preferably, the viscosity regulator is acetone, methyl ethyl ketone, cyclohexanone or n-butanol, and the addition amount is 6-15% of the weight of the epoxy resin.

Preferably, the modified epoxy resin is further added with a toner, wherein the toner is iron oxide red, iron oxide black or iron oxide yellow, and the addition amount of the toner is 1-3% of the weight of the epoxy resin. Toners may be added as needed to change the color of the modified epoxy resin.

Preferably, the weight of the modified epoxy resin accounts for 10-25% of the total weight of the abrasive belt.

Preferably, the weight of the black corundum sand material accounts for more than 70% of the total weight of the abrasive belt. The sand content is improved, the durability of the polishing abrasive belt can be improved, the polishing is more uniform, and the effect is more stable.

Preferably, the epoxy resin is a bisphenol a epoxy resin. The bisphenol A epoxy resin has higher strength and adhesiveness, and the prepared polishing grinding wheel has better toughness and heat resistance.

Preferably, the thickness of the substrate is 1 to 3 cm.

The invention also relates to a preparation method of the polishing abrasive belt, which comprises the following steps:

(1) modification of epoxy resin: adding a curing agent, a modifier and a viscosity regulator into epoxy resin, and uniformly stirring and mixing, wherein the curing agent is polyamide, the addition amount of the curing agent is 20-50% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 5-10% of the weight of the epoxy resin; the viscosity regulator is acetone, methyl ethyl ketone, cyclohexanone or n-butanol, and the addition amount is 6-15% of the weight of the epoxy resin;

(2) blending: adding a black corundum sand material into the modified epoxy resin obtained in the step (1), uniformly mixing, and filling into a grouting container for later use, wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360;

(3) grouting: installing a flat nozzle below the container containing the mixed material obtained in the step (2), blowing on two sides of the base material by using a flat nozzle, rolling the base material by using a shaft roller, and keeping the material in the container in a stirring state all the time in the grouting process; the base material is industrial scouring pad made of nylon;

(4) and (3) curing: putting the abrasive belt subjected to grouting in the step (3) into a drying box for curing, firstly, primarily curing for 2-3 hours at 50-70 ℃, then heating the drying box to 150-; and when the temperature in the drying oven is reduced to 50 ℃, removing the abrasive belt out of the drying oven, and cooling to room temperature to obtain the polishing abrasive belt.

In the step (2), a toner is also added, wherein the toner is iron oxide red, iron oxide black or iron oxide yellow, and the addition amount of the toner is 1-3% of the weight of the epoxy resin.

Preferably, the epoxy resin is a bisphenol a epoxy resin.

In the preparation process of the polishing abrasive belt, a large-roll base material with the thickness of 1-3cm and the width of 1m-2m is selected for mortar perfusion and solidification, the prepared abrasive belt is also a large roll, and the abrasive belt is cut into required sizes to be manufactured into annular abrasive belts connected end to end when in use.

The invention has the beneficial effects that:

the polishing abrasive belt adopts the modified epoxy resin mixed with the black corundum sand material, and the mixture is poured into the base material, so that the sand material is uniformly distributed in the whole base material, and when the polishing abrasive belt is used, the working performance is more stable, the polishing is more uniform, and the polishing efficiency is higher. Compared with the mode that the polishing grinding wheel adopts the outer edge of the cloth wheel to glue and glue the sand in the prior art, the method can save the processes of repeatedly gluing and gluing the sand, is favorable for saving labor force and protecting the body health of workers; compared with the existing sanding belt, the sanding belt has higher sand content, and greatly improves the wear resistance and service life. The base material adopts the scouring pad of nylon material, and the porosity is high, and the sand volume that can bear is big, makes the durability in finished product abrasive band improve greatly, and the fibre of base material and the resin of solidification can be along with the sand material together wearing and tearing, consumption simultaneously, can expose the sand material of nexine when the surface layer sand material drops, has avoided the surface layer sand material to drop the uneven, production mar scheduling problem of polishing that causes. The polishing abrasive belt of the invention adopts black corundum abrasive material, has lower cost and good performance stability, and can better ensure the quality stability of the polishing product. The workpiece polished by the polishing abrasive belt of the invention has more uniform and consistent surface color, no burn trace, and better brightness and color of the polished product.

Detailed Description

The following examples are given to illustrate specific embodiments of the present invention, but are not intended to limit the scope of the present invention in any way. The apparatus elements referred to in the following examples are, unless otherwise specified, conventional apparatus elements; the industrial raw materials are all conventional industrial raw materials which are sold on the market, if not specifically mentioned.

Example 1: a polishing abrasive belt comprises a base material, modified epoxy resin poured in the base material and black corundum sand material uniformly distributed in the modified epoxy resin; wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 5:1, and the particle size range of the black corundum sand material is P40-P360; the base material is industrial scouring pad made of nylon.

The modified epoxy resin is prepared from the following raw materials: the epoxy resin adhesive comprises epoxy resin, a curing agent, a modifier and a viscosity regulator, wherein the curing agent is polyamide, the addition amount of the curing agent is 30% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 8% of the weight of the epoxy resin; the viscosity modifier is cyclohexanone, and the addition amount of the viscosity modifier is 10 percent of the weight of the epoxy resin; the modified epoxy resin is also added with a toner, wherein the toner is ferrite yellow, and the addition amount of the toner is 2% of the weight of the epoxy resin. The epoxy resin is bisphenol A epoxy resin; the thickness of the substrate was 2 cm.

In the finished abrasive belt, the weight of the modified epoxy resin accounts for 10-25% of the total weight of the abrasive belt. The weight of the black corundum sand material accounts for more than 70 percent of the total weight of the abrasive belt.

Example 2: the polishing abrasive belt is different from the polishing abrasive belt in example 1 in that the weight ratio of the black corundum abrasive material to the modified epoxy resin is 4:1, the addition amount of the curing agent is 20% of the weight of the epoxy resin, and the addition amount of the modifying agent is 5% of the weight of the epoxy resin; the viscosity regulator is acetone, and the addition amount of the acetone is 6 percent of the weight of the epoxy resin; the modified epoxy resin is also added with a toner, wherein the toner is iron red, and the addition amount of the toner is 1% of the weight of the epoxy resin. The thickness of the substrate was 1 cm.

Example 3: the polishing abrasive belt is different from the polishing abrasive belt in the embodiment 1 in that the weight ratio of the black corundum abrasive material to the modified epoxy resin is 7:1, the addition amount of the curing agent is 45% of the weight of the epoxy resin, and the addition amount of the modifying agent is 8% of the weight of the epoxy resin; the viscosity regulator is n-butyl alcohol, and the addition amount of the viscosity regulator is 13 percent of the weight of the epoxy resin; the modified epoxy resin is further added with a toner, wherein the toner is iron black, and the addition amount of the toner is 2.5% of the weight of the epoxy resin. The thickness of the substrate was 3 cm.

Example 4: the polishing abrasive belt is different from the polishing abrasive belt in example 1 in that the weight ratio of the black corundum abrasive material to the modified epoxy resin is 6:1, the addition amount of the curing agent is 35% of the weight of the epoxy resin, and the addition amount of the modifying agent is 7% of the weight of the epoxy resin; the viscosity regulator is methyl ethyl ketone, and the addition amount of the viscosity regulator is 8 percent of the weight of the epoxy resin; the modified epoxy resin is also added with a toner, wherein the toner is iron red, and the addition amount of the toner is 1.5 percent of the weight of the epoxy resin. The thickness of the substrate was 2.5 cm.

Example 5: a method for preparing a polishing abrasive belt comprises the following steps:

(1) modification of epoxy resin: adding a curing agent, a modifier and a viscosity regulator into epoxy resin, and uniformly stirring and mixing, wherein the curing agent is polyamide, the addition amount of the curing agent is 20-50% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 5-10% of the weight of the epoxy resin; the viscosity regulator is acetone, methyl ethyl ketone, cyclohexanone or n-butanol, and the addition amount is 6-15% of the weight of the epoxy resin; the epoxy resin is bisphenol A epoxy resin.

(2) Blending: adding a black corundum sand material into the modified epoxy resin obtained in the step (1), uniformly mixing, and filling into a grouting container for later use, wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360; wherein the toner is iron oxide red, iron oxide black or iron oxide yellow, and the addition amount is 1-3% of the weight of the epoxy resin.

(3) Grouting: installing a flat nozzle below the container containing the mixed material obtained in the step (2), blowing on two sides of the base material by using a flat nozzle, rolling the base material by using a shaft roller, and keeping the material in the container in a stirring state all the time in the grouting process; the base material is industrial scouring pad made of nylon.

(4) And (3) curing: putting the abrasive belt subjected to grouting in the step (3) into a drying box for curing, firstly, primarily curing for 2-3 hours at 50-70 ℃, then heating the drying box to 150-; and when the temperature in the drying oven is reduced to 50 ℃, removing the abrasive belt out of the drying oven, and cooling to room temperature to obtain the polishing abrasive belt.

While the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various changes can be made in the specific parameters of the embodiments without departing from the spirit of the present invention, and that various specific embodiments can be made, which are common variations of the present invention and will not be described in detail herein.

Claims (5)

1. A polishing abrasive belt is characterized by comprising a base material, modified epoxy resin poured in the base material, and black corundum sand materials uniformly distributed in the modified epoxy resin; wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360; the base material is industrial scouring pad made of nylon;
the modified epoxy resin is prepared from the following raw materials: the epoxy resin adhesive comprises epoxy resin, a curing agent, a modifier and a viscosity regulator, wherein the curing agent is polyamide, the addition amount of the curing agent is 20-50% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 5-10% of the weight of the epoxy resin;
the viscosity regulator is acetone, methyl ethyl ketone, cyclohexanone or n-butanol, and the addition amount is 6-15% of the weight of the epoxy resin;
the modified epoxy resin is also added with a toner, wherein the toner is iron oxide red, iron oxide black or iron oxide yellow, and the addition amount of the toner is 1-3% of the weight of the epoxy resin;
the weight of the modified epoxy resin accounts for 10-25% of the total weight of the abrasive belt;
the weight of the black corundum sand material accounts for more than 70 percent of the total weight of the abrasive belt;
the thickness of the base material is 1-3 cm.
2. The polishing abrasive belt of claim 1, wherein the epoxy resin is a bisphenol a epoxy resin.
3. A method of making a polishing belt as claimed in claim 1, comprising the steps of:
(1) modification of epoxy resin: adding a curing agent, a modifier and a viscosity regulator into epoxy resin, and uniformly stirring and mixing, wherein the curing agent is polyamide, the addition amount of the curing agent is 20-50% of the weight of the epoxy resin, the modifier is polybutadiene, and the addition amount of the modifier is 5-10% of the weight of the epoxy resin; the viscosity regulator is acetone, methyl ethyl ketone, cyclohexanone or n-butanol, and the addition amount is 6-15% of the weight of the epoxy resin;
(2) blending: adding a black corundum sand material into the modified epoxy resin obtained in the step (1), uniformly mixing, and filling into a grouting container for later use, wherein the weight ratio of the black corundum sand material to the modified epoxy resin is 3-7:1, and the particle size range of the black corundum sand material is P40-P360;
(3) grouting: installing a flat nozzle below the container containing the mixed material obtained in the step (2), blowing on two sides of the base material by using a flat nozzle, rolling the base material by using a shaft roller, and keeping the material in the container in a stirring state all the time in the grouting process; the base material is industrial scouring pad made of nylon;
(4) and (3) curing: putting the abrasive belt subjected to grouting in the step (3) into a drying box for curing, firstly, primarily curing for 2-3 hours at 50-70 ℃, then heating the drying box to 150-; and when the temperature in the drying oven is reduced to 50 ℃, removing the abrasive belt out of the drying oven, and cooling to room temperature to obtain the polishing abrasive belt.
4. The method for producing a coated abrasive according to claim 3, wherein in step (2), a toner is further added, wherein the toner is iron oxide red, iron oxide black or iron oxide yellow, and the amount of the toner added is 1-3% by weight of the epoxy resin.
5. Method for the preparation of a polishing belt according to claim 3, characterized in that said epoxy resin is bisphenol A epoxy resin.
CN201810707226.3A 2018-07-02 2018-07-02 Polishing abrasive belt and preparation method thereof CN108908145B (en)

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Publication number Priority date Publication date Assignee Title
CN110405648A (en) * 2019-06-12 2019-11-05 欧志飞 A kind of preparation method in high temperature resistance and high strength abrasive band

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US6583080B1 (en) * 2000-07-19 2003-06-24 3M Innovative Properties Company Fused aluminum oxycarbide/nitride-Al2O3·rare earth oxide eutectic materials
CN101200053A (en) * 2006-12-13 2008-06-18 广东奔朗超硬材料制品有限公司 Abrasive tool of epoxy resin combined with compounded abrasive
CN101913121A (en) * 2010-07-14 2010-12-15 华南理工大学 Method for preparing non-woven fabric polishing abrasive tool with high abrasion resistance
CN104889896A (en) * 2015-06-30 2015-09-09 清远市百佳研磨科技有限公司 Coated abrasive tool and production method thereof
CN105538179A (en) * 2015-12-24 2016-05-04 江苏锋芒复合材料科技集团有限公司 Efficient highly abrasive emery cloth for casting and manufacturing method thereof
CN106425901A (en) * 2016-07-29 2017-02-22 郑州烨达高新材料有限公司 Black corundum composite sand cloth

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FR2881069B1 (en) * 2005-01-27 2007-04-27 Pierre Laujon Cleaning machine
FR2912941B1 (en) * 2007-01-29 2009-08-21 Marie Rose Laujon Surface treatment machine comprising a controlled conformation band

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6583080B1 (en) * 2000-07-19 2003-06-24 3M Innovative Properties Company Fused aluminum oxycarbide/nitride-Al2O3·rare earth oxide eutectic materials
CN101200053A (en) * 2006-12-13 2008-06-18 广东奔朗超硬材料制品有限公司 Abrasive tool of epoxy resin combined with compounded abrasive
CN101913121A (en) * 2010-07-14 2010-12-15 华南理工大学 Method for preparing non-woven fabric polishing abrasive tool with high abrasion resistance
CN104889896A (en) * 2015-06-30 2015-09-09 清远市百佳研磨科技有限公司 Coated abrasive tool and production method thereof
CN105538179A (en) * 2015-12-24 2016-05-04 江苏锋芒复合材料科技集团有限公司 Efficient highly abrasive emery cloth for casting and manufacturing method thereof
CN106425901A (en) * 2016-07-29 2017-02-22 郑州烨达高新材料有限公司 Black corundum composite sand cloth

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