CN118165531A - High-strength precision casting wax and preparation method thereof - Google Patents
High-strength precision casting wax and preparation method thereof Download PDFInfo
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- CN118165531A CN118165531A CN202410464638.4A CN202410464638A CN118165531A CN 118165531 A CN118165531 A CN 118165531A CN 202410464638 A CN202410464638 A CN 202410464638A CN 118165531 A CN118165531 A CN 118165531A
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- 238000005495 investment casting Methods 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000001993 wax Substances 0.000 claims abstract description 51
- 239000012188 paraffin wax Substances 0.000 claims abstract description 30
- 239000004203 carnauba wax Substances 0.000 claims abstract description 24
- 235000013869 carnauba wax Nutrition 0.000 claims abstract description 24
- 239000004200 microcrystalline wax Substances 0.000 claims abstract description 21
- 235000019808 microcrystalline wax Nutrition 0.000 claims abstract description 21
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims abstract description 18
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 18
- 239000004698 Polyethylene Substances 0.000 claims abstract description 18
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 18
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 18
- -1 polyethylene Polymers 0.000 claims abstract description 18
- 229920000573 polyethylene Polymers 0.000 claims abstract description 18
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 17
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- 125000005456 glyceride group Chemical group 0.000 claims abstract description 17
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920002472 Starch Polymers 0.000 claims abstract description 9
- 239000008107 starch Substances 0.000 claims abstract description 9
- 235000019698 starch Nutrition 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 35
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical group CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000005452 bending Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 238000005266 casting Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 4
- 239000011819 refractory material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L93/00—Compositions of natural resins; Compositions of derivatives thereof
- C08L93/04—Rosin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention discloses high-strength precision casting wax and a preparation method thereof, wherein the precision casting wax comprises the following raw materials in percentage by mass: 20-40 parts of microcrystalline wax, 20-40 parts of paraffin, 30-80 parts of hydrogenated rosin glyceride, 2-20 parts of carnauba wax, 2-20 parts of polyethylene grafted maleic anhydride, 5-30 parts of hydroxyethyl cellulose, 5-30 parts of starch and 1-3 parts of antioxidant. The precision casting wax of the invention is characterized in that the high molecular polymer and various fillers are compounded to improve the wax pattern performance. The precision casting wax has extremely high bending strength and is not easy to deform; the hardness is high, and the damage is not easy to occur; the ash content is low, and the pollution to the environment is reduced; the surface is smooth and flat, and the demolding is easy; the coating property and the fluidity are good.
Description
Technical Field
The invention relates to the field of investment precision casting wax materials, in particular to a high-strength precision casting wax formula and a preparation method thereof.
Background
Investment casting is to take a sample to be obtained as a template, press the prepared precision casting wax into a precision wax mould, coat the precision wax mould with refractory materials, and wait for the slurry to be dried and hardened to form a shell. And then heating the shell to enable the wax mould solidified in the shell to melt and flow out, continuously roasting to enable the shell to be firmer, finally pouring molten liquid metal into the shell, and cooling and solidifying to form a precise and smooth casting.
The commercial and specialized degree of the domestic precision casting mould material is low, the variety of the mould material is relatively simple, and the import of a great number of precision casting wax materials is required. Therefore, the development of the high-quality high-strength precision casting wax material has great significance.
The products prepared by the existing precision casting are almost applied to departments such as industry and the like which are closely related to the life of masses of people, such as energy sources, chemical engineering, petroleum, textiles, electronics, medical appliances and the like, besides being applied to the military industry and aviation.
Many large structural members in the industrial fields of military industry, aerospace and the like require a mold material with small shrinkage, good dimensional stability, good fluidity, high bending strength, high hardness, smooth surface and wettability, and a refractory material is easy to adhere to the surface of the mold. If the shrinkage rate of the wax is large, a model with accurate scale cannot be obtained; poor fluidity, and the mold cannot be well filled in the thin structure position; the surface smoothness is not high and the wettability is not enough, so that concave-convex and hollow surfaces are formed in the prepared refractory material mould; insufficient flexural strength and hardness can make large parts susceptible to deformation and difficult to repair without damage to the surface.
Disclosure of Invention
The invention aims to provide a high-strength precise scheme wax manufacturing formula and a preparation method thereof.
The technical scheme of the invention is to provide high-strength precision casting wax, which is characterized by comprising the following components in parts by weight:
(1) 20-40 parts of microcrystalline wax;
(2) 20-40 parts of paraffin;
(3) 30-80 parts of hydrogenated rosin glyceride;
(4) 2-20 parts of carnauba wax;
(5) 2-20 parts of polyethylene grafted maleic anhydride;
(6) 5-30 parts of hydroxyethyl cellulose;
(7) 5-30 parts of starch;
(8) 1-3 parts of an antioxidant;
The melting point of the microcrystalline wax is 67-72 ℃.
The paraffin wax is one or more of 60# full refined paraffin wax, 62# full refined paraffin wax and 64# full refined paraffin wax, and the melting point is 56-70 ℃.
The softening point of the hydrogenated rosin glyceride is 78-90 ℃, and the acid value is less than or equal to 9.
The melting point of the carnauba wax is more than 83 ℃.
The grafting rate of the polyethylene grafted maleic anhydride is 8%, and the average molecular weight is 3000-8000.
The viscosity of the hydroxyethyl cellulose is 5000-6400 mPa.s (25 ℃).
80% Of the starch and the hydroxyethyl cellulose filler can pass through a 100-mesh sieve, and 50% can pass through a 200-mesh sieve.
The antioxidant is antioxidant 1010.
The preparation method of the high-strength investment precision casting wax mould comprises the following steps:
(1) Heating microcrystalline wax at 90 ℃, continuously stirring until the microcrystalline wax is melted, adding hydrogenated rosin glyceride, continuously heating to 100 ℃, continuously stirring until the microcrystalline wax is melted, and keeping at 100 ℃ for 60-90 min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, continuously stirring until the paraffin wax and the carnauba wax are completely melted, and keeping the temperature at 100 ℃ for 30-60 min.
(3) And (3) continuously heating the temperature obtained in the step (2) at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding starch and an antioxidant, and keeping the temperature at 100 ℃ for 60-90 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃ and keeping the temperature for 60-90 min, and granulating to obtain the precision casting wax.
The viscosity of the precision investment casting wax material prepared by the method is 400-580 mPa.s, and the shrinkage rate is 0.3-0.7%, so that the precision casting wax material has good stability in the casting process; the bending strength of the precision casting wax is between 8 and 10mpa, and the hardness is between 50 and 60, so that the high strength and the high hardness of the precision casting wax in the casting process are ensured, and the precision of the casting can be improved; ash content of the precision casting wax is below 0.02%, so that no pollution in the casting process is ensured; the melting point of the precision casting wax is 54-58 ℃, and the precision casting wax is easier to demould in the casting process. The precision casting wax material has the advantages of stability, high strength, high hardness, low ash content, proper melting point, easy demoulding and the like, and is beneficial to improving the precision casting efficiency of the investment pattern.
The precision casting wax provided by the invention has uniform internal components, uniform shrinkage rate of each part and higher strength.
Detailed Description
The high strength precision casting wax of the present invention will be described in further detail with reference to the following examples:
embodiment one:
the high-strength precision casting wax comprises the following raw materials in parts by weight: 20 parts of microcrystalline wax, 20 parts of paraffin wax, 48 parts of hydrogenated rosin glyceride, 2 parts of carnauba wax, 4 parts of polyethylene grafted maleic anhydride, 5 parts of hydroxyethyl cellulose and 1 part of antioxidant.
(1) Heating microcrystalline wax at 90deg.C, stirring to melt, adding hydrogenated rosin glyceride, heating to 100deg.C, stirring to melt, and maintaining at 100deg.C for 70min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, and continuously stirring until the paraffin wax and the carnauba wax are completely melted and keeping the mixture at 100 ℃ for 50min.
(3) Continuously heating the temperature obtained in the step 2 at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding an antioxidant, and maintaining at 100 ℃ for 70 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃, maintaining the temperature at 90 ℃ for 70min, and then granulating to obtain the precision casting wax.
Embodiment two:
the high-strength precision casting wax comprises the following raw materials in parts by weight: 25 parts of microcrystalline wax, 20 parts of paraffin wax, 30 parts of hydrogenated rosin glyceride, 5 parts of carnauba wax, 7 parts of polyethylene grafted maleic anhydride, 12 parts of hydroxyethyl cellulose and 1 part of antioxidant.
(1) Heating microcrystalline wax at 90deg.C, stirring to melt, adding hydrogenated rosin glyceride, heating to 100deg.C, stirring to melt, and maintaining at 100deg.C for 70min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, and continuously stirring until the paraffin wax and the carnauba wax are completely melted and keeping the mixture at 100 ℃ for 50min.
(3) Continuously heating the temperature obtained in the step 2 at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding an antioxidant, and maintaining at 100 ℃ for 70 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃, maintaining the temperature at 90 ℃ for 70min, and then granulating to obtain the precision casting wax.
Embodiment III:
The high-strength precision casting wax comprises the following raw materials in parts by weight: 30 parts of microcrystalline wax, 20 parts of paraffin wax, 40 parts of hydrogenated rosin glyceride, 10 parts of carnauba wax, 12 parts of polyethylene grafted maleic anhydride, 20 parts of hydroxyethyl cellulose and 2 parts of antioxidant.
(1) Heating microcrystalline wax at 90deg.C, stirring to melt, adding hydrogenated rosin glyceride, heating to 100deg.C, stirring to melt, and maintaining at 100deg.C for 70min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, and continuously stirring until the paraffin wax and the carnauba wax are completely melted and keeping the mixture at 100 ℃ for 50min.
(3) Continuously heating the temperature obtained in the step 2 at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding an antioxidant, and maintaining at 100 ℃ for 70 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃, maintaining the temperature at 90 ℃ for 70min, and then granulating to obtain the precision casting wax.
Embodiment four:
The high-strength precision casting wax comprises the following raw materials in parts by weight: 20 parts of microcrystalline wax, 25 parts of paraffin wax, 60 parts of hydrogenated rosin glyceride, 20 parts of carnauba wax, 15 parts of polyethylene grafted maleic anhydride, 30 parts of hydroxyethyl cellulose and 2 parts of antioxidant.
(1) Heating microcrystalline wax at 90deg.C, stirring to melt, adding hydrogenated rosin glyceride, heating to 100deg.C, stirring to melt, and maintaining at 100deg.C for 70min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, and continuously stirring until the paraffin wax and the carnauba wax are completely melted and keeping the mixture at 100 ℃ for 50min.
(3) Continuously heating the temperature obtained in the step 2 at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding an antioxidant, and maintaining at 100 ℃ for 70 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃, maintaining the temperature at 90 ℃ for 70min, and then granulating to obtain the precision casting wax.
Fifth embodiment:
The high-strength precision casting wax comprises the following raw materials in parts by weight: 30 parts of microcrystalline wax, 25 parts of paraffin wax, 70 parts of hydrogenated rosin glyceride, 15 parts of carnauba wax, 20 parts of polyethylene grafted maleic anhydride, 12 parts of hydroxyethyl cellulose, 12 parts of starch and 3 parts of antioxidant.
(1) Heating microcrystalline wax at 90deg.C, stirring to melt, adding hydrogenated rosin glyceride, heating to 100deg.C, stirring to melt, and maintaining at 100deg.C for 70min.
(2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, and continuously stirring until the paraffin wax and the carnauba wax are completely melted and keeping the mixture at 100 ℃ for 50min.
(3) Continuously heating the temperature obtained in the step 2 at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding starch and an antioxidant, and maintaining at 100 ℃ for 70 minutes.
(4) And (3) continuously stirring and heating the product obtained in the step (3), reducing the temperature to 90 ℃, maintaining the temperature at 90 ℃ for 70min, and then granulating to obtain the precision casting wax.
The method for testing the precision investment casting mold material in the embodiment is as follows:
melting point: the melting point of the precision casting wax is tested by DSC;
hardness: testing the hardness of the precision casting wax by using a Shore hardness tester;
Viscosity: the method specified by the reference GB/T14235.1 is executed;
flexural strength: the method specified by the reference GB/T14235.1 is executed;
linear shrinkage ratio: the method specified by the reference GB/T14235.1 is executed;
ash content: TG was used to test the residual ash of precision casting wax.
The test results of the above examples are shown in table 1 below.
TABLE 1 Performance test data for precision casting wax patterns of examples 1-5
| Project | Melting point (. Degree. C.) | Linear shrinkage (%) | Surface hardness (25 ℃ C.) | Flexural Strength (MPa) | Viscosity (mPa.s/90 ℃ C.) | Ash (%) |
| Example 1 | 54.59 | 0.48 | 50.8 | 8.3624 | 415.4 | ≤0.02 |
| Example two | 55.57 | 0.38 | 51 | 8.1196 | 449 | ≤0.02 |
| Example III | 56.47 | 0.41 | 58 | 10.7897 | 515.3 | ≤0.02 |
| Example IV | 56.57 | 0.54 | 59.4 | 10.6351 | 537.8 | ≤0.02 |
| Example five | 57.54 | 0.62 | 59.8 | 10.8594 | 535.7 | ≤0.02 |
Analysis of results:
as can be seen from table 1: the precision casting wax material has moderate melting point, small linear shrinkage, high hardness, high bending strength, small ash content and moderate viscosity, and can be widely applied to preparing wax models of high-precision aviation casting structural parts and wax models for other precision casting. And the precision casting wax material has the advantages of stability, high strength, high hardness, low ash content, proper melting point, easy demoulding and the like, and is beneficial to improving the precision casting efficiency of the investment pattern.
Claims (3)
1. The high-strength precision casting wax is characterized by comprising the following components in parts by weight:
20-40 parts of microcrystalline wax, 20-40 parts of paraffin, 30-80 parts of hydrogenated rosin glyceride, 2-20 parts of carnauba wax, 2-20 parts of polyethylene grafted maleic anhydride, 5-30 parts of hydroxyethyl cellulose, 5-30 parts of starch and 1-3 parts of antioxidant.
2. The precision casting wax according to claim 1, wherein the hydrogenated rosin glyceride has a softening point of 78 to 90 ℃ and an acid value of 9 or less; the melting point of the microcrystalline wax is 67-72 ℃; the paraffin wax is one or more of 60# full refined paraffin wax, 62# full refined paraffin wax and 64# full refined paraffin wax, and the melting point is 56-70 ℃; carnauba wax with a melting point of > 83 ℃; polyethylene grafted maleic anhydride, wherein the grafting rate of the polyethylene grafted maleic anhydride is 8%, and the average molecular weight is 3000-8000; the hydroxyethyl cellulose and the starch are added in a composite way, 80% of the filler can pass through a 100-mesh sieve, and 50% of the filler can pass through a 200-mesh sieve; the antioxidant is antioxidant 1010.
3. A method for preparing precision casting wax according to any one of claims 1 to 2, comprising the steps of:
(1) Heating microcrystalline wax at 90 ℃, continuously stirring until the microcrystalline wax is melted, adding hydrogenated rosin glyceride, continuously heating to 100 ℃, continuously stirring until the microcrystalline wax is melted, and keeping at 100 ℃ for 60-90 min. (2) Continuously heating the product obtained in the step 1 at 100 ℃, adding paraffin wax and carnauba wax, continuously stirring until the paraffin wax and the carnauba wax are completely melted, and keeping the temperature at 100 ℃ for 30-60 min. (3) And (3) continuously heating the temperature obtained in the step (2) at 100 ℃, adding hydroxyethyl cellulose and polyethylene grafted maleic anhydride, stirring for 20 minutes, adding starch and an antioxidant, and keeping the temperature at 100 ℃ for 60-90 minutes. (4) And (3) continuing stirring and heating the mixture obtained in the step (3), and then reducing the temperature to 90 ℃ and keeping the temperature at 90 ℃ for 60-90 min. And (5) granulating to obtain the precision casting wax.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410464638.4A CN118165531A (en) | 2024-04-17 | 2024-04-17 | High-strength precision casting wax and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410464638.4A CN118165531A (en) | 2024-04-17 | 2024-04-17 | High-strength precision casting wax and preparation method thereof |
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| Publication Number | Publication Date |
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| CN118165531A true CN118165531A (en) | 2024-06-11 |
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| CN202410464638.4A Pending CN118165531A (en) | 2024-04-17 | 2024-04-17 | High-strength precision casting wax and preparation method thereof |
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| Country | Link |
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| CN (1) | CN118165531A (en) |
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