CN115431187A - Manufacturing method of abrasive cloth with high-flatness sand surface accumulated abrasive - Google Patents
Manufacturing method of abrasive cloth with high-flatness sand surface accumulated abrasive Download PDFInfo
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- CN115431187A CN115431187A CN202211116005.1A CN202211116005A CN115431187A CN 115431187 A CN115431187 A CN 115431187A CN 202211116005 A CN202211116005 A CN 202211116005A CN 115431187 A CN115431187 A CN 115431187A
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- abrasive
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- cloth
- flatness
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- 239000004576 sand Substances 0.000 title claims abstract description 81
- 239000004744 fabric Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 42
- 238000000227 grinding Methods 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 41
- 238000001035 drying Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 238000007493 shaping process Methods 0.000 claims abstract description 26
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 28
- 238000001125 extrusion Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- -1 polydimethylsiloxane Polymers 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 8
- 229920001568 phenolic resin Polymers 0.000 claims description 8
- 239000005011 phenolic resin Substances 0.000 claims description 8
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 229910052882 wollastonite Inorganic materials 0.000 claims description 8
- 239000010456 wollastonite Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 7
- 239000012744 reinforcing agent Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001610 cryolite Inorganic materials 0.000 claims description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical group O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 4
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 4
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 4
- 239000003082 abrasive agent Substances 0.000 description 16
- 239000002987 primer (paints) Substances 0.000 description 12
- 239000006061 abrasive grain Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000005498 polishing Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 238000009990 desizing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical group [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000009999 singeing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B24D11/02—Backings, e.g. foils, webs, mesh fabrics
-
- 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
- B24D11/08—Equipment for after-treatment of the coated backings, e.g. for flexing the coating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a method for manufacturing abrasive cloth with high flatness sand surface accumulated abrasive, which adds a sand surface shaping procedure in the conventional production flow of the abrasive cloth, wherein the improved production flow comprises the following steps: coating base glue, planting sand, primary drying, shaping a sand surface, coating compound glue, secondary drying, hot winding, curing, flexing and standing. The abrasive cloth produced by the invention introduces a sand surface shaping process in a normal production flow, shapes the once dried sand surface through the sand surface shaping device, crushes high points on the sand surface on the premise of ensuring the normal distribution of the abrasive on the base material surface, ensures that the sand surface keeps consistent flatness, avoids a pre-grinding step when the abrasive belt is used, and simultaneously improves the processing precision of products.
Description
Technical Field
The invention belongs to the field of grinding tools, and particularly relates to a method for manufacturing abrasive cloth with a high-flatness sand surface accumulated abrasive.
Background
The stacked abrasive is a large abrasive grain group formed by bonding a large number of ordinary abrasive grains (generally 80 mesh or finer) with a binder; the abrasive cloth is made by adhering the abrasive to a flexible base material through an adhesive. Compared with the common abrasive cloth, abrasive grain groups can be uniformly separated and fall off in the grinding process, new sections are exposed, the processing consistency and the product sharpness are kept, the grinding service life can be theoretically prolonged by 5-10 times, the abrasive grains can achieve good heat dissipation and anti-blocking effects due to the fact that the abrasive grains fall off layer by layer, and the front and back grinding effects of the surface of a workpiece can be consistent due to the fact that new sharp sections continuously appear.
The abrasive cloth product is mainly applied to the fields of metal (generally titanium alloy and stainless steel) wires, metal plates, metal pipes, piston rods, cylinders, metal tank bodies, medical instruments, catering facilities and the like, and is mainly used for polishing products.
Today, the manufacturing industry is rapidly developing, manufacturers have higher and higher requirements on grinding and polishing, and the abrasive cloth is required to have a certain grinding life and maintain good machining precision. Because the common abrasive cloth only has a single-layer abrasive, the common abrasive cloth is difficult to keep consistent processing precision and good grinding service life along with the breakage and falling of the abrasive in the grinding process.
Compared with the common abrasive belt, the grinding life and the processing precision of the domestic accumulated abrasive belt are improved to a certain extent, but the shapes of the accumulated abrasives are not completely the same, and gravity is adopted to plant the sand in the production process, so that the contour of the sand surface is inconsistent. In practical application, the pre-grinding is needed, and the consistent polishing precision can be maintained after the stacked abrasives are ground to be consistent in contour. Therefore, the surface flatness of the abrasive cloth still needs to be improved.
The abrasive cloth requires a long life and a consistent machining accuracy. This requires the product to have a flat sand surface. In the actual production process, the shapes of the used stacked abrasives are not completely consistent, and the sand surface is uneven after the abrasives are planted by gravity.
The abrasive cloth is large in particle and mostly used for polishing, and the requirement on the grinding precision of the product is very strict. In the future, the accumulated abrasive cloth still needs to be researched in terms of abrasive planting uniformity and sand surface flatness.
A 'manufacturing process method of a stacked abrasive cloth' is disclosed in a patent CN108422341A, which relates to a production process of the stacked abrasive cloth, but does not explain how to ensure the flatness of a sand surface of the stacked abrasive;
in patent CN102732215B, "an inorganic bonding agent stacked abrasive and a method for manufacturing abrasive cloth by using the stacked abrasive" are disclosed, wherein before the first drying process, the abrasive after gravity sand-planting is flattened to prevent the abrasive from stacking, but the extrusion causes the abrasive to shift on the base material, which affects the distribution of the abrasive on the base material. In addition, the device can not eliminate the problem of uneven sand surface caused by the shape difference of the abrasive;
in patent CN102729158B, "an organic bond stacked abrasive and a method for manufacturing abrasive cloth using the stacked abrasive" are disclosed, wherein before the first drying process, the abrasive after gravity sand-planting is flattened to prevent the abrasive from stacking, but the extrusion causes the abrasive to shift on the base material, which affects the distribution of the abrasive on the base material. In addition, the device cannot solve the problem of uneven sand surface caused by the shape difference of the abrasive.
Because the shapes of the accumulated abrasives are not completely the same, and gravity is adopted to plant sand in the production process, the high-consistency of the sand surface is inconsistent, and the smoothness of the sand surface is influenced. In practical application, the accumulated abrasive is ground into the consistent polishing precision after being pre-ground and the like. Therefore, the surface flatness of the abrasive cloth still needs to be improved.
Disclosure of Invention
The invention aims to provide a method for manufacturing abrasive cloth with high flatness and accumulated abrasive on a sand surface.
Based on the purpose, the invention adopts the following technical scheme:
a method for manufacturing abrasive cloth with high flatness sand surface accumulation comprises the following steps:
(1) Coating a primer: and uniformly coating the prepared primer on the base material. The viscosity of the primer is 2500-3500 mpa.s, the temperature of the glue solution is 38-42 ℃, and the coating amount of the primer is 200-800 g/m 2 The base material is polyester cloth, pure cotton cloth or polyester cotton blended cloth which is treated by singeing, desizing, washing, drying, shaping, dipping and sizing and pulp scraping procedures, and the single weight of the treated base material is 200 to 800 g/m 2 ；
(2) Sand planting: and (3) carrying out sand planting treatment on the base material coated with the primer obtained in the step (1) to uniformly disperse the grinding materials on the surface of the base material. The sand planting method is gravity sand planting, and the sand planting process comprises the following steps: the sand planting gap is 1500-3500 mu m, and the base material running speed is 15-35 m/min. The abrasive is a stacked abrasive, the abrasive is in a regular round shape or an irregular strip shape, the diameter of the stacked abrasive particles is 0.70 mm-3.35 mm, and the particle size of the stacked abrasive is 80-1200 meshes.
(3) Primary drying: and (3) drying the product obtained in the step (2) for one time. The drying method is suspension type drying, and the drying temperature curve is as follows: 85 to 105 ℃ and 1 to 2h;
(4) Sand surface shaping: extruding and flattening the sand surface of the product obtained in the step (3) by a sand surface shaping device; the sand surface shaping device consists of an upper extrusion roller and a lower extrusion roller, two ends of a roller shaft of the upper extrusion roller are respectively connected with piston rods of two cylinders so as to control the up-and-down movement of the upper extrusion roller and the pressure of the upper extrusion roller through the cylinders, and the two extrusion rollers roll in a gear meshing manner; the technological parameters of flattening are as follows: the rotating speeds of the upper roller and the lower roller are the same and are consistent with the running speed of the base material, and the pressure of a cylinder is 3 to 8 bar
(5) Coating glue: and (4) coating a layer of coating adhesive on the surface of the product obtained in the step (4). The viscosity of the compound adhesive is 500-1700 mpa.s, and the temperature of the adhesive is 38-42 ℃. The coating amount of the compound adhesive is 400 to 950 g/m 2 ；
(6) Secondary drying: and (5) carrying out secondary drying on the product obtained in the step (5), wherein the drying method is suspension drying, and the drying temperature curve is as follows: 75 to 115 ℃ and 100min to 120min;
(7) Hot winding: and winding the product after secondary drying in a high-temperature environment. The hot winding temperature is 100 to 120 ℃;
(8) And (3) curing: and (4) curing the product obtained in the step (7) at high temperature to enable the glue solution to react fully, so that the holding force of the base material to the grinding material is improved. The curing temperature is 105 to 130 ℃, and the curing time is 2 to 5 hours;
(9) And (3) flexing: and (4) mechanically flexing the product obtained in the step (8) to continuously break the sand glue layer so as to obtain the flexibility of the abrasive cloth in use. The bending direction is 45 degrees and 90 degrees, the diameter of a bending knife is 20-30 mm, and the bending pressure is 3-6 bar;
(10) Parking: and (4) standing the product obtained in the step (9) for a period of time to eliminate the internal stress of the product, thus obtaining the high-surface-flatness accumulated abrasive cloth. The parking environment temperature is 20-30 ℃, the humidity is 60-70%, and the parking time is 1~2 weeks.
The primer comprises the following components in percentage by weight: 45-65% of resin, 30-50% of filler, 2-8% of reinforcing agent and 0.1-1.5% of flatting agent, wherein the resin is phenolic resin, the filler is one or a mixture of more than two of calcium carbonate, wollastonite and chalk soil in any proportion, the reinforcing agent is one or a mixture of more than two of DH-1, DH-2, DH-3 and DH-4 in any proportion, and the flatting agent is one or a mixture of more than two of polydimethylsiloxane and polyphenyl methylsiloxane in any proportion. The preparation method of the primer comprises the following steps: and mixing the materials by using a glue pot. 1) Adding resin into a glue pot, and then starting stirring at the stirring speed of 600 rpm; 2) Adding filler, stirring for 5-10min to mix the filler and resin uniformly; 3) Sequentially adding a flatting agent and a reinforcing agent, and stirring for 2-5 min; 4) Adding a solvent, adjusting the viscosity of the glue solution to a required value, and continuously stirring for 5-15 min to obtain the primer, wherein the solvent is water.
The compound glue comprises the following components in percentage by weight: 48-65% of resin, 33-50% of grinding aid, 0.1-0.2% of flatting agent, 0.1-0.25% of defoaming agent and 1-2% of pigment, wherein the resin is phenolic resin, the grinding aid is one or a mixture of more than two of wollastonite, cryolite, potassium fluoborate and sodium fluoborate in any proportion, the flatting agent is one or a mixture of two of polydimethylsiloxane and polyphenyl methylsiloxane in any proportion, the defoaming agent is polyether modified silicone oil, and the pigment is black iron oxide.
The compound glue preparation method comprises the following steps: and mixing the materials by using a glue pot. 1) Adding resin into a glue pot, and then starting stirring at the stirring speed of 600 rpm; 2) Adding grinding aid, and stirring for 5-10min to uniformly mix the grinding aid and the resin; 3) Sequentially adding a leveling agent, a defoaming agent and a pigment, and stirring for 2min to 5min; 4) Adding a solvent, adjusting the viscosity of the glue solution to a required value, and continuously stirring for 5min to 15min to obtain a compound glue; the solvent is one or a mixture of more than two of water, ether glycol and methyl ether glycol in any proportion.
Preferably, the base material in the step (1) is polyester cloth which is subjected to sizing, dipping and sizing and pulp scraping, and the unit weight of the treated cloth is 500-800 g/m 2 。
Preferably, the diameter of the stacked abrasive particles in the step (2) is (1.00 to 2.36) mm, and the composed abrasive particle size of the stacked abrasive is (240 to 1000) meshes;
preferably, the sand planting gap in the step (2) is 2200 to 3000 μm;
in detail, the drying temperature curve in the step (3) is as follows: 85-0.5 h, 95-0.5 h and 105-0.5 h;
preferably, the cylinder pressure in the step (4) is 4 to 7 bar;
in detail, the material of the extrusion roller in the step (4) is No. 45 steel, the radius is 150 mm, and the width is 1800 mm;
in detail, the gap between the upper and lower flattening rollers in the step (4) is the sum of the average grain diameter of the abrasive and the thickness of the base material, so as to prevent the abrasive from being incompletely ground or being excessively ground to damage a sand surface;
preferably, the viscosity of the compound glue solution in the step (5) is 800-1500 mpa.s, and the coating amount is 500-850 g/m 2 ；
In detail, the drying temperature curve in the step (6) is as follows: 75-30 min, 85-30 min, 95-30 min, 105-30 min and 115-30 min;
preferably, in the step (8), the curing temperature is 110-120 ℃, and the curing time is 3-4 h;
preferably, the diameter of the flexible knife in the step (9) is 25 mm, and the flexible pressure is 4 to 5 bar.
Primer coating: the grinding material and the base material are bonded together to play a role of a bridge; compounding glue: the coating is coated on the surface of the abrasive, so that the holding force of the base material to the abrasive is improved, and the abrasive is prevented from falling off integrally in the grinding process.
This application mainly improves through piling up abrasive material emery cloth production procedure and technology, increases the sand face shaping device, optimizes sand face shaping device technological parameter simultaneously, realizes the preparation that abrasive material was piled up to high roughness sand face. The abrasive cloth produced by the invention introduces a sand surface shaping process in the normal production flow, shapes the once dried sand surface through the sand surface shaping device, crushes high points on the sand surface on the premise of ensuring the normal distribution of the abrasive on the base material surface, and ensures that the sand surface keeps consistent flatness. The pre-grinding step when the abrasive belt is used is avoided, and the processing precision of the product is improved.
Drawings
FIG. 1 is a schematic view of the topography of a sand surface before and after shaping, taking a circular abrasive as an example;
FIG. 2 is a schematic structural diagram of a sand face reshaping device;
FIG. 3 is an abrasive cloth made in comparative example 1;
FIG. 4 is an abrasive cloth made in example 1;
in the figure: 1. the method comprises the following steps of (1) shaping a sand surface, 2) a base material, 3) a shaped sand surface, 4. A cylinder, 5. An upper extrusion roller, 6. A lower extrusion roller, 7. An upper meshing gear and 8. A lower meshing gear.
Detailed Description
The difference between the preparation method of the abrasive cloth of the accumulated abrasive and the preparation method of the existing coated abrasive tool is that a sand surface shaping device is added after primary drying and before glue coating, and the purpose of shaping the sand surface is to improve the flatness of the sand surface. The preparation method comprises the following steps: coating base glue, planting sand, primary drying, shaping a sand surface, coating compound glue, secondary drying, hot winding, curing, flexing and standing.
As shown in fig. 2, the sand surface shaping device is composed of an upper squeeze roller 5 and a lower squeeze roller 6, an upper meshing gear 7 and a lower meshing gear 8 are respectively arranged at the same end of the two squeeze rollers, the upper meshing gear 7 and the upper squeeze roller 5 are coaxially arranged, the lower meshing gear 8 and the lower squeeze roller 6 are coaxially arranged, two ends of a roller shaft of the upper squeeze roller 5 are respectively connected with piston rods of two cylinders 4, so that the up-and-down movement of the upper squeeze roller 5 and the pressure of the upper squeeze roller 5 are controlled through the cylinders 4, the two squeeze rollers roll in a gear meshing mode, and no rotation speed difference exists. The upper extrusion roll 5 and the lower extrusion roll 6 are made of No. 45 steel, have the radius of 150 mm and the width of 1800 mm.
The base material is polyester cloth treated by singeing, desizing, washing, drying, shaping, dipping and sizing and slurry scraping processes, and the basis weight of the treated base material is 200 to 800 g/m 2 The treatment process of the polyester cloth is the prior art.
Example 1:
a method for manufacturing abrasive cloth with high flatness sand surface accumulation comprises the following steps:
preparing base glue according to mass percent: 50% of phenolic resin, 35% of wollastonite, 12% of calcium carbonate, 2.9% of reinforcing agent DH-1 and 0.1% of polydimethylsiloxane.
The preparation method of the primer comprises the following steps: 1) Adding phenolic resin into the glue pot, and then starting stirring at the stirring speed of 600 rpm; 2) Adding wollastonite, and stirring for 5min; 3) Sequentially adding DH-1 and polydimethylsiloxane, and stirring for 2min; 4) Adding water, adjusting the viscosity of the glue solution to 2800 mpa.s, and continuously stirring for 15min to obtain the primer glue material.
Preparing compound glue according to mass percent: 50% of phenolic resin, 20% of cryolite, 10% of potassium fluoborate, 10% of sodium fluoborate, 8% of wollastonite, 0.2% of polydimethylsiloxane, 0.15% of polyether modified silicone oil and 1.65% of iron oxide black.
The compound glue preparation method comprises the following steps: 1) Adding phenolic resin into the glue pot, and then starting stirring at the stirring speed of 600 rpm; 2) Sequentially adding wollastonite, cryolite, potassium fluoborate and sodium fluoborate, and stirring for 5min; 3) Sequentially adding polydimethylsiloxane, polyether modified silicone oil and black iron oxide, and stirring for 5min; 4) Adding water, adjusting the viscosity of the glue solution to 1200 mpa.s, and continuously stirring for 10min to obtain the compound glue material.
Step 1: uniformly coating the primer on the base material, wherein the glue application temperature is 42 ℃, and the coating amount is 550 g/m 2 The base material is a treated polyester cloth base with the single weight of 600 g/m 2 ；
Step 2: carrying out gravity sand planting on the circular stacked abrasives, wherein the sand planting gap is 2300 mu m, the equipment running speed is 20 m/min, the particle size of the stacked abrasives is (1.18-1.40) mm, and the particle size of the formed stacked abrasives is 180 meshes;
and 3, step 3: carrying out primary drying on the product obtained in the step 2, wherein the drying curve is 85-0.5 h, 95-0.5 h and 105-0.5 h;
and 4, step 4: performing sand surface shaping on the product obtained in the step 3, wherein the pressure of an air cylinder is 5 bar; as shown in FIG. 1, the sand surface 1 is uneven before the surface of the base material 2 is shaped, and after shaping, the sand surface 3 is flat.
And 5: coating the surface of the product obtained in the step 4 with the coating glue, wherein the glue applying temperature is 42 ℃, and the coating glue coating amount is 650 g/m 2 ；
Step 6: carrying out secondary drying on the product obtained in the step 5, wherein the drying curve is 75-30 min, 85-30 min, 95-30 min, 105-30 min and 115-30 min;
and 7: carrying out hot winding on the product obtained in the step 6, wherein the winding temperature is 112 ℃;
and 8: curing the product obtained in the step 7 at 115 ℃ for 3h;
and step 9: kneading the product obtained in the step 8 at 45 degrees and 90 degrees, wherein the diameter of a kneading knife is 25 mm, and the kneading pressure is 5 bar;
step 10: and (4) standing the product obtained in the step (9) for 7 days under the temperature and humidity of the natural environment to obtain the stacked abrasive cloth, wherein the abrasive surface is flat as shown in figure 4.
Example 2~3:
example 2~3 is similar to the procedure of example 1, except: the cylinder pressures in step 4 were 6 bar (example 2) and 7 bar (example 3), respectively;
example 4~5:
example 4~5 is similar to the procedure of example 1, except: the composition abrasive particle sizes of the stacked abrasives in the step 2 are 320 meshes (example 4) and 600 meshes (example 5) respectively;
example 6~8:
example 6~8 is similar to the procedure of example 1 with the difference that: the diameters of the stacked abrasive particles in the step 2 are respectively 1.00-1.18 mm (example 6), 1.40-1.70 mm (example 7) and 1.70-2.36mm (example 8);
example 9:
example 9 is similar to example 1, except that: the shape of the abrasive material in the step 2 is a strip-shaped abrasive material, the diameter of the stacked abrasive material particles is 1.18-1.40 mm, and the composition abrasive particle size of the stacked abrasive material is 180 meshes.
Comparative example 1:
comparative example 1 is similar to example 1 in steps and process parameters, except that: there is no abrasive grain dressing step in step 4.
As shown in FIG. 3, the abrasive surface of the abrasive cloth which is not shaped by the abrasive surface has convex abrasive materials and is not flat.
The experimental method comprises the following steps:
the stacked abrasive cloth made in example 1~9 was rolled into a stacked abrasive belt with a gauge of 1350 mm x 3200 mm for grinding tests. The grinding pressure is 30N, the grinding mode is roller grinding, the hardness of the contact wheel is 65 degrees, the rotating speed is 12 m/s, the grinding material is a TC titanium alloy plate, the specification is 1000 × 1850 × 1.8 mm, and the grinding period is 40 min. The grinding life and the surface quality of the ground workpiece of the example abrasive belts were recorded.
Experimental result data:
after the abrasive belt with the accumulated abrasive prepared in embodiment 1~9 is used for shaping a sand surface by using an abrasive shaping device, the flatness of the sand surface is improved, the surface of a workpiece after grinding is free of scratches, and the grinding precision is good.
The experimental method comprises the following steps:
comparative example 1 adopts a conventional production flow, and differs from the examples in that: there is no abrasive grain dressing step in step 4.
The stacked abrasive cloth produced in comparative example 1 was rolled into a stacked abrasive belt with a gauge of 1350 mm by 3200 mm for grinding tests. The grinding pressure is 30N, the grinding mode is roller grinding, the hardness of the contact wheel is 65 degrees, the rotating speed is 12 m/s, the grinding material is a TC titanium alloy plate, the specification is 1000 × 1850 × 1.8 mm, and the grinding period is 40 min. The grinding life and the surface quality of the ground workpiece of the example abrasive belts were recorded.
Experimental result data:
compared with the embodiment 1~9, the workpiece surface is scratched in the grinding process of the previous 4 periods of the comparison example, the roughness of the workpiece surface is higher than that of the embodiment, and the effective machining precision cannot be guaranteed.
Finally, it should be noted that: the above examples are intended only to illustrate specific embodiments of the present invention and not to limit the same, and it should be understood by those skilled in the art that any equivalent substitutions or obvious modifications of the embodiments of the present invention without changing their performance or use without departing from the spirit of the present invention shall fall within the scope of the claims of the present invention.
Claims (9)
1. A method for manufacturing abrasive cloth with high-flatness sand surface accumulation is characterized by comprising the following steps:
(1) Coating a primer: uniformly coating the prepared primer on a base material; the viscosity of the primer is 2500 to 3500 mpa.s, and the temperature of the glue solution is 38 to 42 ℃; the coating amount of the primer is 200 to 800 g/m 2 ；
(2) Sand planting: the abrasive is attached to the base rubber by a gravity sand planting method, and the sand planting process comprises the following steps: the sand planting gap is 1500-3500 mu m, and the base material running speed is 15-35 m/min;
(3) Primary drying: drying the product obtained in the step (2) at 85-105 ℃ for 1-2h for one time;
(4) Sand surface shaping: extruding and flattening the sand surface of the product obtained in the step (3) by a sand surface shaping device; the sand surface shaping device consists of an upper extrusion roller and a lower extrusion roller, two ends of a roller shaft of the upper extrusion roller are respectively connected with piston rods of two cylinders so as to control the up-and-down movement of the upper extrusion roller and the pressure of the upper extrusion roller through the cylinders, and the two extrusion rollers roll in a gear meshing manner;
the technological parameters of flattening are as follows: the rotating speeds of the upper roller and the lower roller are the same, and are consistent with the running speed of the base material, and the pressure of the air cylinder is 3 to 8 bar;
(5) Coating glue: coating a layer of compound glue on the surface of the product obtained in the step (4); the viscosity of the compound adhesive is 500-1700 mpa.s, and the temperature of the adhesive solution is 38-42 ℃; the coating amount of the compound adhesive is 400 to 950 g/m 2 ；
(6) Secondary drying: carrying out secondary drying on the product obtained in the step (5) at the temperature of 75-115 ℃, wherein the drying time is 100min-120min;
(7) Hot winding: winding the product after secondary drying in a high-temperature environment; the hot winding temperature is 100 to 120 ℃;
(8) And (3) curing: curing the product obtained in the step (7) at 105-130 ℃ for 2 h-5 h;
(9) And (3) flexing: mechanically flexing the product obtained in the step (8), wherein the flexing directions are 45-degree and 90-degree flexing, the diameter of a flexing knife is 20-30 mm, and the flexing pressure is 3-6 bar;
(10) Parking: and (5) placing the product obtained in the step (9) for 1~2 weeks at the ambient temperature of 20-30 ℃ and the humidity of 60-70%, so as to obtain the high-surface-flatness abrasive cloth.
2. The method for manufacturing the abrasive cloth with the high-flatness sand surface accumulated abrasive according to claim 1, wherein the primer comprises the following components in percentage by weight: 45-65% of resin, 30-50% of filler, 2-8% of reinforcing agent and 0.1-1.5% of flatting agent, wherein the resin is phenolic resin, the filler is one or a mixture of more than two of calcium carbonate, wollastonite and chalk soil in any proportion, the reinforcing agent is one or a mixture of more than two of DH-1, DH-2, DH-3 and DH-4 in any proportion, and the flatting agent is one or a mixture of more than two of polydimethylsiloxane and polyphenyl methylsiloxane in any proportion; the preparation method of the primer comprises the following steps: 1) Adding resin into the glue pot, and then starting stirring; 2) Adding the filler, and uniformly stirring; 3) Sequentially adding the flatting agent and the reinforcing agent, and uniformly stirring; 4) Adding water, adjusting the viscosity of the glue solution to a required value, and continuously stirring for 5-15 min to obtain the glue solution.
3. The method for manufacturing the abrasive cloth with high-flatness sand surface accumulated abrasive according to claim 1, wherein the compound adhesive comprises the following components in percentage by weight: 48-65% of resin, 33-50% of grinding aid, 0.1-0.2% of flatting agent, 0.1-0.25% of defoaming agent and 1-2% of pigment, wherein the resin is phenolic resin, the grinding aid is one or a mixture of more than two of wollastonite, cryolite, potassium fluoborate and sodium fluoborate in any proportion, the flatting agent is one or a mixture of two of polydimethylsiloxane and polyphenyl methylsiloxane in any proportion, the defoaming agent is polyether modified silicone oil, the pigment is iron oxide black, and the compounding method comprises the following steps: 1) Adding resin into the glue pot, and then starting stirring; 2) Adding a grinding aid, and uniformly stirring; 3) Sequentially adding a flatting agent, a defoaming agent and a pigment, and uniformly stirring; 4) Adding a solvent, adjusting the viscosity of the glue solution to a required value, and continuously stirring for 5-15 min to obtain the glue solution, wherein the solvent is one or a mixture of more than two of water, ether glycol and methyl ether glycol in any proportion.
4. The method for manufacturing the abrasive cloth with the high-flatness sand surface stacked abrasive according to claim 1, wherein the abrasive is the stacked abrasive and is circular or long-strip-shaped, the diameter of the stacked abrasive particles is 0.70 mm-3.35 mm, and the composition abrasive particle size of the stacked abrasive is 80-1200 meshes.
5. The method for manufacturing the abrasive cloth with high flatness sand surface piled abrasive according to claim 1, wherein the base material is polyester cloth, pure cotton cloth or polyester cotton blended cloth, and the basis weight of the base material is 200-800 g/m 2 。
6. The method for manufacturing the abrasive cloth with high flatness sand surface piled according to claim 1, wherein the viscosity of the primer in the step (1) is 2700-3000 mpa-s, and the coating amount is 350-700 g/m 2 (ii) a The sand planting gap in the step (2) is 2200 to 3000 mu m; the viscosity of the compound adhesive in the step (5) is 800-1500 mpa · s, and the coating amount is 500-850 g/m 2 (ii) a In the step (8), the curing temperature is 110-120 ℃, and the curing time is 3-4 h; the diameter of the flexible knife in the step (9) is 25 mm, and the flexible pressure is 4-5 bar.
7. The method for manufacturing the abrasive cloth according to claim 1, wherein the drying methods in step (3) and step (6) are suspension drying, and the drying temperature curve in step (3) is: 85-0.5 h, 95-0.5 h and 105-0.5 h; the drying temperature curve in the step (6) is as follows: 75-30 min, 85-30 min, 95-30 min, 105-30 min and 115-30 min.
8. The method for manufacturing the abrasive cloth according to claim 1, wherein the upper and lower squeeze rolls are made of 45 steel, have a radius of 150 mm and a width of 1800 mm.
9. The manufacturing method of the abrasive cloth with the high-flatness sand surface accumulated abrasive according to claim 1, wherein the cylinder pressure in the step (4) is 4-7 bar; the clearance between the upper and the lower squeeze rolls is the sum of the average grain diameter of the abrasive and the thickness of the base material, so as to prevent the abrasive from being over the part and not completely rolled or from being excessively rolled to damage the sand surface.
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