CN110819126A - Medium-temperature prepared wax and preparation method thereof - Google Patents
Medium-temperature prepared wax and preparation method thereof Download PDFInfo
- Publication number
- CN110819126A CN110819126A CN201810928152.6A CN201810928152A CN110819126A CN 110819126 A CN110819126 A CN 110819126A CN 201810928152 A CN201810928152 A CN 201810928152A CN 110819126 A CN110819126 A CN 110819126A
- Authority
- CN
- China
- Prior art keywords
- wax
- mixture
- heating
- medium
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention belongs to the technical field of precision casting, and particularly relates to a medium-temperature modulated wax and a preparation method thereof, wherein the medium-temperature modulated wax is prepared by sequentially adding microcrystalline wax, rosin, carnauba wax, ethylene-vinyl acetate copolymer and stearic acid according to step communication, and has high strength and difficult deformation; the gray level is low, and the pollution to metal casting is reduced; the mold is easy to demould, and the wax mold is easy to melt and flow out of the shell during demoulding; has better fragrance atmosphere; in the precision casting process, the production efficiency can be effectively improved.
Description
Technical Field
The invention belongs to the technical field of precision casting, and particularly relates to medium-temperature conditioning wax and a preparation method thereof.
Background
With the development of society, precision castings have been widely used in the aviation, weapon, and other industrial sectors, particularly in electronics, petroleum, chemical, transportation, light industry, textile, pharmaceutical, medical, pump, and valve components.
The mould material commonly used at present is two or three of paraffin, stearic acid and rosin for use in a matching way, has good plasticity and filling property, but the mould material has poor thermal stability, low strength, high ash content, unfixed demoulding time, generates a large amount of waste products, has low quality and high cost, seriously influences the improvement of casting quality, has small competitiveness in the international market of the produced casting, and cannot meet the requirements of the precision casting industry.
However, many investment casting enterprises in China want to produce castings for export, and the quality of the castings is required to be improved for export. Therefore, advanced investment casting equipment and high quality mold material are required in the production process.
Disclosure of Invention
The invention aims to solve the problems and provides the medium-temperature prepared wax and the preparation method thereof, and the prepared medium-temperature prepared wax has good dimensional stability, high strength, low ash content, easy demoulding and better fragrance atmosphere.
The invention is realized by adopting the following technical scheme:
the medium-temperature modulated wax comprises the following raw materials in parts by weight: 44 parts of microcrystalline wax, 2.5 parts of rosin, 34 parts of carnauba wax, 3.5 parts of ethylene-vinyl acetate copolymer and 12 parts of stearic acid.
The invention also provides a method for preparing the medium-temperature conditioning wax, which comprises the following steps:
(1) dividing carnauba wax into two parts, heating one part at 120 ℃, continuously stirring until the carnauba wax is melted, adding the other part of carnauba wax, continuously heating, and continuously stirring until the carnauba wax is melted to obtain melted carnauba wax A;
(2) continuously heating the molten carnauba wax A obtained in the step (1) at 100-120 ℃, adding rosin, and continuously stirring until the mixture is completely molten to obtain a mixture B;
(3) continuously heating the mixture B obtained in the step (2) at 110-120 ℃, adding an ethylene-vinyl acetate copolymer, and continuously stirring until the mixture is completely molten to obtain a mixture C;
(4) continuously heating the mixture C obtained in the step (3) at 120 ℃, adding stearic acid, and continuously stirring until the mixture C is completely melted to obtain a mixture D;
(5) continuously heating the mixture D obtained in the step (4) at 110-120 ℃, and continuously stirring;
(6) cooling the mixture D processed in the step (5) to 100 ℃, continuing heating and stirring, adding microcrystalline wax at 90-100 ℃, and heating and stirring until the microcrystalline wax is molten to obtain a mixture E;
(7) and (4) continuously stirring and heating the mixture E obtained in the step (6), cooling to 80-90 ℃ and preparing into particles to obtain the medium-temperature prepared wax.
Further, in the step (2), the step (3) and the step (4), the heating time is 1-2 minutes.
Further, the heating time in the step (5) and the heating time in the step (7) are both 3-4 hours.
Further, the heating time in the step (6) is 30-60 minutes.
The invention has the beneficial effects that:
1. the linear shrinkage rate and the sinking rate are low, so that the product has strong dimensional stability;
2. the penetration is within the range of 5-6 dmm, so that the product has high strength;
3. the gray level is low, so that the surface smoothness of the casting is good, the metal cannot be polluted, and the casting quality is high;
4. the softening point and the dropping point are in the ideal range, so that the die is easy to be removed in the casting process, and the production efficiency is higher.
Detailed Description
The technical solutions in the examples will be clearly and completely described below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1
Weighing the following components in parts by weight: 44 parts of microcrystalline wax, 2.5 parts of rosin, 34 parts of carnauba wax, 3.5 parts of ethylene-vinyl acetate copolymer and 12 parts of stearic acid, and preparing the medium-temperature prepared wax according to the following steps:
(1) dividing carnauba wax into two parts, heating one part at 120 ℃, continuously stirring until the carnauba wax is melted, adding the other part of carnauba wax, continuously heating, and continuously stirring until the carnauba wax is melted to obtain melted carnauba wax A;
(2) continuously heating the molten carnauba wax A obtained in the step (1) at 100 ℃ for 1 minute, adding rosin, and continuously stirring until the mixture is completely molten to obtain a mixture B;
(3) continuously heating the mixture B obtained in the step (2) at 110 ℃ for 1 minute, adding ethylene-vinyl acetate copolymer, and continuously stirring until the mixture is completely molten to obtain a mixture C;
(4) continuously heating the mixture C obtained in the step (3) at 120 ℃ for 1 minute, adding stearic acid, and continuously stirring until the mixture C is completely melted to obtain a mixture D;
(5) continuously heating the mixture D obtained in the step (4) at 110 ℃, and continuously stirring for 3 hours;
(6) cooling the mixture D processed in the step (5) to 100 ℃, continuing heating and stirring for 30 minutes, adding microcrystalline wax at 90 ℃, and heating and stirring until the microcrystalline wax is molten to obtain a mixture E;
(7) and (4) continuously stirring and heating the mixture E obtained in the step (6) for 3 hours, cooling to 80 ℃, and granulating to obtain the medium-temperature prepared wax.
Example 2
Weighing the following components in parts by weight: 46 parts of microcrystalline wax, 3.5 parts of rosin, 36 parts of carnauba wax, 4.5 parts of ethylene-vinyl acetate copolymer and 14 parts of stearic acid, and preparing the medium-temperature prepared wax according to the following steps:
(1) dividing carnauba wax into two parts, heating one part at 120 ℃, continuously stirring until the carnauba wax is melted, adding the other part of carnauba wax, continuously heating, and continuously stirring until the carnauba wax is melted to obtain melted carnauba wax A;
(2) continuously heating the molten carnauba wax A obtained in the step (1) at 120 ℃ for 2 minutes, adding rosin, and continuously stirring until the mixture is completely molten to obtain a mixture B;
(3) continuously heating the mixture B obtained in the step (2) at 120 ℃ for 2 minutes, adding ethylene-vinyl acetate copolymer, and continuously stirring until the mixture is completely molten to obtain a mixture C;
(4) continuously heating the mixture C obtained in the step (3) at 120 ℃ for 2 minutes, adding stearic acid, and continuously stirring until the mixture C is completely melted to obtain a mixture D;
(5) continuously heating the mixture D obtained in the step (4) at 120 ℃, and continuously stirring for 4 hours;
(6) cooling the mixture D processed in the step (5) to 100 ℃, continuing heating and stirring for 60 minutes, adding microcrystalline wax at 100 ℃, and heating and stirring until the microcrystalline wax is molten to obtain a mixture E;
(7) and (4) continuously stirring and heating the mixture E obtained in the step (6) for 4 hours, cooling the temperature to 90 ℃, and preparing into particles to obtain the medium-temperature prepared wax.
Example 3
Weighing the following components in parts by weight: 45 parts of microcrystalline wax, 3 parts of rosin, 35 parts of carnauba wax, 4 parts of ethylene-vinyl acetate copolymer and 13 parts of stearic acid, and the medium-temperature prepared wax is prepared by the following steps:
(1) dividing carnauba wax into two parts, heating one part at 120 ℃, continuously stirring until the carnauba wax is melted, adding the other part of carnauba wax, continuously heating, and continuously stirring until the carnauba wax is melted to obtain melted carnauba wax A;
(2) continuously heating the molten carnauba wax A obtained in the step (1) at 110 ℃ for 1.5 minutes, adding rosin, and continuously stirring until the mixture is completely molten to obtain a mixture B;
(3) continuously heating the mixture B obtained in the step (2) at 115 ℃ for 1.5 minutes, adding ethylene-vinyl acetate copolymer, and continuously stirring until the mixture is completely molten to obtain a mixture C;
(4) continuously heating the mixture C obtained in the step (3) at 120 ℃ for 1.5 minutes, adding stearic acid, and continuously stirring until the mixture C is completely molten to obtain a mixture D;
(5) continuously heating the mixture D obtained in the step (4) at 115 ℃, and continuously stirring for 3.5 hours;
(6) cooling the mixture D processed in the step (5) to 100 ℃, continuing heating and stirring for 45 minutes, adding microcrystalline wax at 95 ℃, and heating and stirring until the microcrystalline wax is molten to obtain a mixture E;
(7) and (4) continuously stirring and heating the mixture E obtained in the step (6) for 3-4 hours, cooling to 85 ℃, and preparing into particles to obtain the medium-temperature prepared wax.
In this embodiment, the microcrystalline wax and the carnauba wax are mixed in the above-mentioned mass parts, which is helpful for improving the strength and stability of the casting wax, and further improving the precision and production efficiency of the casting.
Comparative example
Taking the medium temperature modulated waxes prepared in examples 1, 2 and 3 of the invention respectively, measuring various technical indexes, taking three common medium temperature modulated waxes, and carrying out the technical index measurement to obtain experimental data shown in table 1:
table 1: detection results of medium-temperature modulated wax prepared in embodiment of the invention and common medium-temperature modulated wax
| Detecting items | Penetration/ddm | Softening point/. degree.C | Ash content | Shrinkage rate |
| Example 1 | 5.6 | 87 | 0.014 | 0.85 |
| Example 2 | 5.5 | 85 | 0.017 | 0.84 |
| Example 3 | 5.8 | 86 | 0.015 | 0.85 |
| Ordinary medium-temperature conditioning wax | 7.9 | 60 | 0.044 | 0.97 |
As can be seen from the detection results in Table 1, the cone penetration of the medium-temperature modulated wax manufactured according to the invention is always kept within the range of 5-6 dmm, so that the medium-temperature modulated wax has high strength; the softening point and the dropping point are kept within the range of 80-90 ℃, so that the easy demoulding in the casting process is ensured; the ash content is low, so that the surface smoothness of the casting is good, the metal cannot be polluted, and the casting quality is high; the shrinkage rate is kept at a low value, and the product has good dimensional stability.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. The medium-temperature conditioning wax is characterized by comprising the following raw materials in parts by mass: 44-46 parts of microcrystalline wax, 2.5-3.5 parts of rosin, 34-36 parts of carnauba wax, 3.5-4.5 parts of ethylene-vinyl acetate copolymer and 12-14 parts of stearic acid.
2. A process for preparing the medium temperature formulated wax of claim 1, comprising the steps of:
(1) dividing carnauba wax into two parts, heating one part at 120 ℃, continuously stirring until the carnauba wax is melted, adding the other part of carnauba wax, continuously heating, and continuously stirring until the carnauba wax is melted to obtain melted carnauba wax A;
(2) continuously heating the molten carnauba wax A obtained in the step (1) at 100-120 ℃, adding rosin, and continuously stirring until the mixture is completely molten to obtain a mixture B;
(3) continuously heating the mixture B obtained in the step (2) at 110-120 ℃, adding an ethylene-vinyl acetate copolymer, and continuously stirring until the mixture is completely molten to obtain a mixture C;
(4) continuously heating the mixture C obtained in the step (3) at 120 ℃, adding stearic acid, and continuously stirring until the mixture C is completely melted to obtain a mixture D;
(5) continuously heating the mixture D obtained in the step (4) at 110-120 ℃, and continuously stirring;
(6) cooling the mixture D processed in the step (5) to 100 ℃, continuing heating and stirring, adding microcrystalline wax at 90-100 ℃, and heating and stirring until the microcrystalline wax is molten to obtain a mixture E;
(7) and (4) continuously stirring and heating the mixture E obtained in the step (6), cooling to 80-90 ℃ and preparing into particles to obtain the medium-temperature prepared wax.
3. The method for preparing medium-temperature conditioning wax according to claim 2, wherein the heating time in the step (2), the step (3) and the step (4) is 1-2 minutes.
4. A preparation method of medium-temperature conditioning wax as claimed in claim 2, wherein the heating time in the step (5) and the heating time in the step (7) are both 3-4 hours.
5. A process for preparing medium-temperature conditioning wax according to claim 2, wherein the heating time in the step (6) is 30-60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928152.6A CN110819126A (en) | 2018-08-13 | 2018-08-13 | Medium-temperature prepared wax and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928152.6A CN110819126A (en) | 2018-08-13 | 2018-08-13 | Medium-temperature prepared wax and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110819126A true CN110819126A (en) | 2020-02-21 |
Family
ID=69547387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810928152.6A Withdrawn CN110819126A (en) | 2018-08-13 | 2018-08-13 | Medium-temperature prepared wax and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110819126A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048104A (en) * | 2020-08-31 | 2020-12-08 | 安徽省含山县威建铸造厂(普通合伙) | Preparation method of casting medium-temperature model wax |
| CN115505274A (en) * | 2022-11-07 | 2022-12-23 | 常德市汉鼎精铸技术服务有限公司 | Formula and application process of medium-temperature environment-friendly casting wax |
-
2018
- 2018-08-13 CN CN201810928152.6A patent/CN110819126A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112048104A (en) * | 2020-08-31 | 2020-12-08 | 安徽省含山县威建铸造厂(普通合伙) | Preparation method of casting medium-temperature model wax |
| CN112048104B (en) * | 2020-08-31 | 2021-12-14 | 安徽省含山县威建铸造厂(普通合伙) | Preparation method of casting medium-temperature model wax |
| CN115505274A (en) * | 2022-11-07 | 2022-12-23 | 常德市汉鼎精铸技术服务有限公司 | Formula and application process of medium-temperature environment-friendly casting wax |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104592765A (en) | Precisely cast low-temperature modulated wax and preparation method thereof | |
| CN100432019C (en) | Manufacture method for nylon tectorial membrane ceramics powder material | |
| CN102828096B (en) | Metal ceramic cutting tool material and preparation method thereof | |
| CN104096835A (en) | Energy-saving powder metallurgy process | |
| CN110819126A (en) | Medium-temperature prepared wax and preparation method thereof | |
| CN103911100A (en) | Polyoxymethylene-based binder for powder injection molding and preparation method of polyoxymethylene-based binder | |
| CN105907107A (en) | Precision casting concocted wax and treatment process | |
| CN110629131A (en) | 3D printing stainless steel material, preparation method and application | |
| CN110814278A (en) | Preparation method of precision casting modulated wax | |
| CN102442819A (en) | Method for preparing high-performance large aluminum oxide product at low cost | |
| CN107236309B (en) | A kind of hot investment casting wax-pattern material and preparation method thereof based on Fischer-Tropsch wax | |
| CN110819122A (en) | Medium-temperature die material for casting and preparation method thereof | |
| CN110814279A (en) | Precision casting modulation wax | |
| CN103949584B (en) | The sand mould casting method of the 22nd grade of stator blade is pressed in H level combination circulation steam turbine | |
| CN106702248B (en) | The mixed crystal hard alloy and manufacture method of corrosion-resistant anti-EDM processing cracking | |
| CN110540409A (en) | Powder of alumina ceramic part and preparation method thereof | |
| CN111545758A (en) | Novel 316L feed for low-temperature powder injection molding and preparation process | |
| CN109679301B (en) | Filler model material based on graphene/polyethylene glycol terephthalate modified resin and preparation method thereof | |
| CN110819124A (en) | Mold material for precision casting mold and preparation method thereof | |
| CN110819125A (en) | Low-temperature mold material for precision casting mold and preparation method thereof | |
| CN108817401B (en) | Preparation method of 1.4435 stainless steel injection molding feed and method for preparing product | |
| CN103706741A (en) | Hot forging and molding process for oxygen free copper material | |
| CN104556698B (en) | A kind of cigarette yellow crystal pearl embryo and preparation method thereof | |
| CN110421174A (en) | A kind of iron-based feeding formula of metal powder injection molded stainless steel-and production method | |
| CN103880417A (en) | Preparation method of zirconium oxide ceramic products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200221 |
|
| WW01 | Invention patent application withdrawn after publication |