CN115304807A - Air-float guide rail material and manufacturing method thereof - Google Patents
Air-float guide rail material and manufacturing method thereof Download PDFInfo
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- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
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Abstract
The invention discloses an air-float guide rail material and a manufacturing method thereof, belonging to the technical field of measuring tools and manufacturing. The air-floating guide rail material comprises the following components in parts by weight: 50-70% of alumina powder, 10-15% of carbon fiber prepreg, 5-10% of polysiloxane, 10-15% of adhesive, 2-5% of sintering aid and 3-5% of dispersant. According to the invention, the carbon fiber layer prepared by the carbon fiber prepreg has the characteristics of high strength, high toughness and low density, and the modified alumina powder prepared by mixing the alumina powder, polysiloxane, a sintering aid and a crosslinking agent is laid on the carbon fiber layer, so that the air floatation guide rail material has high surface density, high strength and few defects, and compared with natural granite, the air floatation guide rail material is lighter in weight, is suitable for being used as a moving part, and cannot influence the environment.
Description
Technical Field
The invention relates to the technical field of measuring tools and manufacturing, in particular to an air-floating guide rail material and a manufacturing method thereof.
Background
The air-float guide rail is a high-precision guide rail, mainly used for precision metering industry.
At present, natural granite and aluminum alloy are mainly adopted as guide rail materials in the air floatation guide rail. However, the aluminum alloy has insufficient surface hardness, the natural granite has a heavy weight not suitable for moving parts and the environmental impact is large due to mass mining, and the like.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an air-float guide rail material and a manufacturing method thereof.
On the one hand, the air-float guide rail material is provided, and comprises the following components in parts by weight: 50-70% of alumina powder, 10-15% of carbon fiber prepreg, 5-10% of polysiloxane, 10-15% of adhesive, 2-5% of sintering aid and 3-5% of dispersant.
Further, the adhesive is selected from at least one of thermoplastic polyamide modified epoxy resin and organic silicon modified epoxy resin.
Further, the sintering aid is selected from CaO powder, mgO powder, and SiO 2 At least one of the powders.
Further, the dispersing agent is selected from at least one of triethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol and polyacrylamide.
In another aspect, a method for preparing an air rail material is provided, the method comprising:
s1: mixing alumina powder, polysiloxane, a sintering aid and a cross-linking agent to prepare modified alumina powder;
s2: mixing the modified alumina powder with an adhesive to obtain a first mixture;
s3: and uniformly coating the first mixture on the surface of a carbon fiber layer prepared by carbon fiber prepreg, and heating and curing to obtain the air-floatation guide rail material.
Further, in S3, the preparing of the carbon fiber layer by the carbon fiber prepreg specifically includes:
laying a first packaging film layer on the surface of a core mold, laying and pasting the carbon fiber prepreg on the surface of the first packaging film layer, laying a second packaging film layer on the surface of the carbon fiber prepreg, hermetically connecting the first packaging film layer and the second packaging film layer to form a closed space, putting into an external mold, and curing and molding to obtain the carbon fiber layer.
The carbon fiber prepreg is a semi-finished product prepared by compounding carbon fibers or fabrics and a resin matrix, and is a main intermediate material for manufacturing a composite material structural member.
Further, the curing and molding conditions in the preparation of the carbon fiber layer by the carbon fiber prepreg are as follows:
curing pressure: 0.5MPa to 0.7MPa, the curing temperature is 100 ℃ to 150 ℃, and the curing time is 30 to 60min.
Further, the S1 specifically includes:
mixing the alumina powder and the sintering aid to obtain a second mixture;
adding a dispersing agent into the second mixture, and adding absolute ethyl alcohol to obtain a third mixture;
ball-milling the third mixture, heating until absolute ethyl alcohol is completely evaporated to obtain a fourth mixture,
adding polysiloxane to the fourth mixture to obtain a fifth mixture,
and ball-milling the fifth mixture to obtain the modified alumina powder.
Furthermore, the particle size of the modified alumina powder is 1-2 mm.
Further, the S3 specifically includes:
laying a third packaging film layer on the surface of the carbon fiber layer, coating the first mixture on the surface of the third packaging film layer, laying a fourth packaging film layer on the surface of the first mixture, hermetically connecting the third packaging film layer and the fourth packaging film layer to form a closed space, placing an outer die, and curing and molding to obtain the air-floatation guide rail material.
Further, the heating curing conditions in S3 are as follows:
curing pressure: 0.5MPa to 1MPa, the curing temperature is 150 ℃ to 300 ℃, and the curing time is 3 to 5 hours.
Further, the first, second, third, and fourth encapsulating film layers are all selected from high temperature resistant polymer film layers. Can be one of polyimide, polyarylether and polybenzazole.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the invention, the carbon fiber layer prepared by the carbon fiber prepreg has the characteristics of high strength, high toughness and low density, and the modified alumina powder prepared by mixing the alumina powder, polysiloxane, a sintering aid and a crosslinking agent is laid on the carbon fiber layer, so that the air floatation guide rail material has high surface density, high strength and few defects, and compared with natural granite, the air floatation guide rail material is lighter in weight, is suitable for being used as a moving part, and cannot influence the environment. In addition, the carbon fiber layer and the air-floating guide rail material are sealed by the packaging film layer during preparation, and the inner wall and the outer wall have high surface quality after being heated and pressed and formed by vacuum.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a method for preparing an air rail material according to the present invention;
FIG. 2 is a schematic structural diagram of an air rail material according to the present invention.
Reference numerals: 1-a carbon fiber layer; 2-first mixture.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
An air-float guide rail material comprises the following components by weight: 50% of alumina powder, 15% of carbon fiber prepreg, 10% of polysiloxane, 15% of polyamide modified epoxy resin, 5% of CaO powder and 5% of triethylhexylphosphoric acid.
The preparation method comprises the following steps:
a step (101): laying a first packaging film layer on the surface of a core mold, uniformly laying 15% of carbon fiber prepreg on the surface of the first packaging film layer, laying a second packaging film layer on the surface of the carbon fiber prepreg, hermetically connecting the first packaging film layer and the second packaging film layer to form a closed space, placing into an outer mold, curing for 30min at the temperature of 100 ℃ under the pressure of 0.5MPa, cooling at room temperature, and taking down the outer mold and the first packaging film layer to obtain the carbon fiber layer.
A step (102): mixing 50% of alumina powder and 5% of CaO powder to obtain a second mixture, adding 5% of triethylhexylphosphoric acid and absolute ethyl alcohol into the second mixture, and uniformly mixing and stirring to obtain a third mixture; and ball-milling the third mixture for 1h, heating to 80 ℃ until absolute ethyl alcohol is completely evaporated to obtain a fourth mixture, adding 10% of polysiloxane into the modified alumina powder to obtain a fifth mixture, and ball-milling the fifth mixture for 2h to obtain modified alumina powder with the particle size of 1 mm.
Step (103): and mixing the modified alumina powder with 15% of polyamide modified epoxy resin at room temperature, and uniformly stirring to obtain a first mixture.
A step (104): laying a third packaging film layer on the surface of the carbon fiber layer, uniformly coating a first mixture on the surface of the third packaging film layer, laying a fourth packaging film layer on the surface of the first mixture, hermetically connecting the third packaging film layer and the fourth packaging film layer to form a closed space, placing an outer mold, curing for 3 hours at the temperature of 150 ℃ under the pressure of 0.5MPa, cooling at room temperature, and taking down the third packaging film layer, the fourth packaging film layer, the second packaging film layer, the outer mold and a core mold to obtain the air floatation guide rail material. The air-float guide rail can be obtained by further processing, and the cross section of the air-float guide rail can be any one of rectangle, square, cylinder, trapezoid and triangle.
Example two
An air-float guide rail material comprises the following components in percentage by weight: 60% of alumina powder, 12% of carbon fiber prepreg, 8% of polysiloxane, 12% of organic silicon modified epoxy resin, 4% of MgO powder and 4% of sodium dodecyl sulfate.
The preparation method comprises the following steps:
a step (201): laying a first packaging film layer on the surface of a core mold, uniformly laying 12% of carbon fiber prepreg on the surface of the first packaging film layer, laying a second packaging film layer on the surface of the carbon fiber prepreg, hermetically connecting the first packaging film layer and the second packaging film layer to form a closed space, placing into an outer mold, curing for 40min at the temperature of 130 ℃ under the pressure of 0.6MPa, cooling at room temperature, and taking down the outer mold and the first packaging film layer to obtain the carbon fiber layer.
Step (202): mixing 60% of alumina powder and 4% of MgO powder to obtain a second mixture, adding 5% of sodium dodecyl sulfate into the second mixture, adding absolute ethyl alcohol, and uniformly mixing and stirring to obtain a third mixture; and ball-milling the third mixture for 1.5h, then heating to 90 ℃ until absolute ethyl alcohol is completely evaporated to obtain a fourth mixture, adding 8% of polysiloxane into the modified alumina powder to obtain a fifth mixture, and ball-milling the fifth mixture for 1.5h to obtain modified alumina powder with the particle size of 1.5 mm.
Step (203): and mixing the modified alumina powder with 12% of organic silicon modified epoxy resin, and uniformly stirring to obtain a first mixture.
A step (204): laying a third packaging film layer on the surface of the carbon fiber layer, coating a first mixture on the surface of the third packaging film layer, laying a fourth packaging film layer on the surface of the first mixture, hermetically connecting the third packaging film layer and the fourth packaging film layer to form a closed space, placing into an external mold, curing for 4 hours at the temperature of 250 ℃ under the pressure of 0.7MPa, cooling at room temperature, and taking down the third packaging film layer, the fourth packaging film layer, the second packaging film layer, the external mold and the core mold to obtain the air floatation guide rail material. The air-float guide rail can be obtained by further processing, and the cross section of the air-float guide rail can be any one of rectangle, square, cylinder, trapezoid and triangle.
EXAMPLE III
An air-float guide rail material comprises the following components in percentage by weight: 70% of alumina powder, 10% of carbon fiber prepreg, 5% of polysiloxane, 10% of organic silicon modified epoxy resin and 2% of SiO 2 Powder and 3% polyacrylamide.
The preparation method comprises the following steps:
a step (301): laying a first packaging film layer on the surface of a core mold, uniformly laying 10% of carbon fiber prepreg on the surface of the first packaging film layer, laying a second packaging film layer on the surface of the carbon fiber prepreg, hermetically connecting the first packaging film layer and the second packaging film layer to form a closed space, placing into an outer mold, curing for 60min at the temperature of 150 ℃ under the pressure of 0.7MPa, cooling at room temperature, and taking down the outer mold and the first packaging film layer to obtain the carbon fiber layer.
Step (302): 70 percent of alumina powder and 2 percent of SiO 2 Mixing the powder to obtain a second mixture, adding 3% of polyacrylamide into the second mixture, adding absolute ethyl alcohol, and uniformly mixing and stirring to obtain a third mixture; and ball-milling the third mixture for 2h, heating to 100 ℃ until absolute ethyl alcohol is completely evaporated to obtain a fourth mixture, adding 5% of polysiloxane into the modified alumina powder to obtain a fifth mixture, and ball-milling the fifth mixture for 1h to obtain modified alumina powder with the particle size of 2mm.
Step (303): and mixing the modified alumina powder with 10% of organic silicon modified epoxy resin, and uniformly stirring to obtain a first mixture.
A step (304): laying a third packaging film layer on the surface of the carbon fiber layer, coating a first mixture on the surface of the third packaging film layer, laying a fourth packaging film layer on the surface of the first mixture, hermetically connecting the third packaging film layer and the fourth packaging film layer to form a closed space, placing into an external mold, curing for 5 hours at the pressure of 1MPa and the temperature of 300 ℃, cooling at room temperature, and taking down the third packaging film layer, the fourth packaging film layer, the second packaging film layer, the external mold and the core mold to obtain the air floatation guide rail material. The air-float guide rail can be obtained by further processing, and the cross section of the air-float guide rail can be any one of rectangle, square, cylinder, trapezoid and triangle.
The polysiloxane is a ceramic precursor and has a general formula of [ RnSi 4 -n/2] m The polymer is a polymer which takes a repeated Si-O bond as a main chain and is directly connected with an organic group on a silicon atom, wherein R represents the organic group, such as methyl, phenyl and the like; n is the number of organic groups (between 1 and 3) connected on the silicon atom; m is the degree of polymerization (m is not less than 2). Polysiloxane has the advantages of excellent high-temperature stability and the like, polysiloxane is combined with alumina powder, a ceramic precursor can be converted into ceramic in the heating process of curing, and the prepared modified alumina powder is high in density, high in strength and few in defects.
The dispersant is a substance capable of suspending solid particles as fine particles in a liquid to form a dispersion, and is generally a surfactant. The purpose of dispersion is achieved by preventing the particles from approaching each other, the polymer dispersant is adsorbed on the surface of the solid particles, the high-molecular long chain of the polymer dispersant fully extends in a medium to generate steric hindrance, mutual aggregation of the solid particles is prevented, and the dispersion stability of the second mixture is improved. The sintering aid is an oxide or non-oxide that can promote sintering densification when heated for curing.
It is worth mentioning that, in the invention, the carbon fiber layer prepared by the carbon fiber prepreg has the characteristics of high strength, high toughness and low density, and the modified alumina powder prepared by mixing the alumina powder, the polysiloxane, the sintering aid and the cross-linking agent is laid on the carbon fiber layer, so that the air-float guide rail material has high surface density, high strength and few defects, and compared with natural granite, the air-float guide rail material has lighter weight, is suitable for being used as a moving part and does not influence the environment. In addition, the carbon fiber layer and the air-floating guide rail material are sealed by the packaging film layer during preparation, and the inner wall and the outer wall have high surface quality after being heated and pressed and formed by vacuum.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The air-float guide rail material is characterized by comprising the following components in parts by weight: 50-70% of alumina powder, 10-15% of carbon fiber prepreg, 5-10% of polysiloxane, 10-15% of adhesive, 2-5% of sintering aid and 3-5% of dispersant.
2. The air rail material as claimed in claim 1, wherein the adhesive is at least one selected from the group consisting of polyamide-modified epoxy resin and silicone-modified epoxy resin.
3. The air rail material as claimed in claim 1, wherein the sintering aid is selected from CaO powder, mgO powder and SiO powder 2 At least one of the powders.
4. The air rail material as claimed in claim 1, wherein the dispersant is at least one selected from the group consisting of triethylhexyl phosphoric acid, sodium dodecyl sulfate, methylpentanol and polyacrylamide.
5. The method for preparing the air rail material according to any one of claims 1 to 4, wherein the method comprises the following steps:
s1: mixing alumina powder, polysiloxane, a sintering aid and a cross-linking agent to prepare modified alumina powder;
s2: mixing the modified alumina powder with an adhesive to obtain a first mixture;
s3: and uniformly coating the first mixture on the surface of a carbon fiber layer prepared by carbon fiber prepreg, and heating and curing to obtain the air-floatation guide rail material.
6. The method for preparing the air-float guide rail material according to claim 5, wherein in S3, the step of preparing the carbon fiber layer by using the carbon fiber prepreg specifically comprises the following steps:
laying a first packaging film layer on the surface of a core mold, paving and sticking the carbon fiber prepreg on the surface of the first packaging film layer, laying a second packaging film layer on the surface of the carbon fiber prepreg, connecting the first packaging film layer and the second packaging film layer in a sealing manner to form a closed space, putting into an outer mold, and curing and molding to obtain the carbon fiber layer.
7. The method for preparing the air-float guide rail material according to claim 6, wherein the curing and molding conditions in the preparation of the carbon fiber layer by the carbon fiber prepreg are as follows:
curing pressure: 0.5MPa to 0.7MPa, the curing temperature is 100 ℃ to 150 ℃, and the curing time is 30 to 60min.
8. The method as claimed in claim 5, wherein the step S1 specifically comprises:
mixing the alumina powder and the sintering aid to obtain a second mixture;
adding a dispersing agent into the second mixture, and adding absolute ethyl alcohol to obtain a third mixture;
ball-milling the third mixture, heating until absolute ethyl alcohol is completely evaporated to obtain a fourth mixture,
adding polysiloxane to the fourth mixture to obtain a fifth mixture,
and ball-milling the fifth mixture to obtain the modified alumina powder.
9. The method as claimed in claim 5, wherein the step S3 specifically comprises:
laying a third packaging film layer on the surface of the carbon fiber layer, coating the first mixture on the surface of the third packaging film layer, laying a fourth packaging film layer on the surface of the first mixture, hermetically connecting the third packaging film layer and the fourth packaging film layer to form a closed space, placing an outer die, and curing and molding to obtain the air-floatation guide rail material.
10. The method as claimed in claim 9, wherein the heating curing condition in S3 is as follows:
curing pressure: 0.5MPa to 1MPa, the curing temperature is 150 ℃ to 300 ℃, and the curing time is 3 to 5 hours.
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2022
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Application publication date: 20221108 |