Casting wax pattern material and preparation method thereof

Abstract

The invention discloses a casting wax pattern material which is prepared from the following components in parts by weight: 50-60 parts of paraffin, 25-28 parts of modified microcrystalline wax, 12-16 parts of modified rosin, 8-12 parts of benzoic acid modified zinc acrylate resin, 7-10 parts of filler, 5-7 parts of a dispersing agent, 4-6 parts of a toughening agent and 2-3 parts of 2, 5-furandimethanol. The preparation method comprises the following steps: mixing paraffin, modified microcrystalline wax and modified rosin according to a ratio, uniformly melting to obtain a basic wax liquid, mixing the basic wax liquid with benzoic acid modified zinc acrylate resin, a filler, a dispersant, a flexibilizer and 2, 5-furandimethanol to obtain a wax liquid, and filtering at 140-150 DEG C and 0.6-0.7 MPa to obtain the casting wax pattern material. According to the prepared casting wax pattern material, by adding all functional components, the problems that the wax pattern material is poor in thermal stability, high in shrinkage rate, prone to deformation and the like are solved, and the investment casting quality is improved. And the preparation process is simple and suitable for large-scale popularization and application.

Description

Technical Field

[0001] This invention relates to the field of precision casting technology, and in particular to a casting wax model material and its preparation method. Background Technology

[0002] Precision casting is a high-precision and highly complex casting process that requires experienced craftsmen to ensure the accuracy of every step. This process plays a vital role in modern industrial production, providing high-quality castings to various industries and driving continuous industrial development.

[0003] Precision casting wax offers several advantages: it enables the production of complex-shaped parts, such as blades and gears; secondly, the manufacturing process is simple and inexpensive; and thirdly, it can produce high-precision parts with high surface quality, making it suitable for fields such as precision instruments and aerospace. Wax casting is a precision casting method with high precision and surface quality, suitable for producing high-quality metal parts.

[0004] In precision casting, wax pattern material is a key material used to manufacture wax patterns. Its main function is to form a precise wax pattern through a specific process, providing a foundation for subsequent casting production. The wax pattern material is heated, mixed, and then poured into a mold, where it cools and solidifies to form the wax pattern. The precision and stability of the wax pattern directly affect the quality of the final casting.

[0005] Currently, wax modeling materials on the market have poor composition stability and shrinkage deformation properties. Traditional paraffin-stearic acid modeling materials (50% paraffin + 50% stearic acid) have a linear shrinkage rate as high as 2%, and low thermal stability, making them prone to deformation due to temperature fluctuations. In addition, uneven cooling of wax modeling materials can easily lead to regional shrinkage, causing twisting or cracking.

[0006] Therefore, solving the problems of poor thermal stability, high shrinkage rate, and easy deformation of wax mold materials is a technical problem that the wax mold material industry urgently needs to solve. Summary of the Invention

[0007] This invention provides a casting wax model material and its preparation method. The casting wax model material obtained is prepared by adding various functional components to solve the problems of poor thermal stability, high shrinkage rate and easy deformation of wax model materials mentioned in the background art.

[0008] In a first aspect, the present invention provides a casting wax mold material comprising the following components in parts by weight: 50-60 parts paraffin wax, 25-28 parts modified microcrystalline wax, 12-16 parts modified rosin, 8-12 parts benzoic acid modified zinc acrylate resin, 7-10 parts filler, 5-7 parts dispersant, 4-6 parts toughening agent, and 2-3 parts 2,5-furandimethyl alcohol.

[0009] As a preferred technical solution of the present invention, the modified microcrystalline wax is prepared by the following method: microcrystalline wax, polypropylene, high-density polyethylene and stearic acid are weighed in a mass ratio of 50-60:8-10:3-5:1 and then placed in a homogenizer with a rotation speed of 55-60 rpm for homogenization and mixing for 28-30 min to obtain modified microcrystalline wax.

[0010] As a preferred embodiment of the present invention, the modified rosin is prepared by the following method: maleic anhydride and rosin resin are mixed evenly at a mass ratio of 1:4-5 and then treated in a plasma device for 6-8 minutes to obtain modified rosin.

[0011] As a preferred embodiment of the present invention, the benzoic acid modified zinc acrylate resin is prepared by the following method: benzoic acid, zinc oxide and acrylic resin are weighed in a mass ratio of 1-2:1:25-30, mixed evenly and placed in a sealed glass bottle, and then placed in an oven at 35-40°C for copolymerization reaction for 2-3 hours to obtain benzoic acid modified zinc acrylate resin.

[0012] As a preferred embodiment of the present invention, the filler is any one or a mixture of two of cross-linked polystyrene, graphite, and phthalic anhydride.

[0013] As a preferred embodiment of the present invention, the dispersant is any one or a mixture of two of nonylphenol polyoxyethylene ether, sodium dihexyl succinate, sodium dioctyl succinate, and sodium isopropyl naphthalene sulfonate.

[0014] As a preferred embodiment of the present invention, the toughening agent is any one or a mixture of two of ethylene-vinyl acetate copolymer, chlorinated polyethylene, polysulfide compound and polyazel anhydride.

[0015] As a preferred embodiment of the present invention, the charge density of the plasma device is 900–980 C / cm³. 3 The gas flow rate is 1.3–1.4 L / min, the pressure is 110–115 kPa, and the temperature is 35–40 °C.

[0016] Secondly, the present invention provides a method for preparing casting wax mold material, comprising the following steps: S1. Mix paraffin wax, modified microcrystalline wax and modified rosin in a certain proportion and melt them evenly to obtain a base wax liquid.

[0017] S2. Benzoic acid-modified zinc acrylate resin, filler, dispersant, toughening agent and 2,5-furandiethanol are added to the base wax liquid in proportion and mixed evenly to obtain the wax liquid.

[0018] S3. The wax liquid is filtered at a constant temperature of 140-150℃ and a pressure of 0.6-0.7MPa to obtain casting wax mold material. The filter paper has a pore size of 5-8μm.

[0019] The present invention has the following beneficial effects: 1. The modified microcrystalline wax of this invention is prepared by homogenizing and blending microcrystalline wax with stearic acid, polypropylene, and high-density polyethylene in a homogenizer. The modified microcrystalline wax can improve the strength, thermal stability, melting point, and surface finish of casting wax mold materials. The microcrystalline wax and high-density polyethylene can refine the wax crystals, reducing brittle cracks caused by large grains and improving the plasticity of the wax mold. Based on microcrystalline wax, the modified microcrystalline wax improves the strength and flowability of the wax mold material by introducing carboxyl (-COOH) polar groups to alter its molecular structure and physical properties. Furthermore, the addition of modified microcrystalline wax can improve the interfacial bonding of the wax mold material, enhancing its impact strength and toughness.

[0020] 2. The modified rosin of this invention utilizes plasma-induced chemical reactions to reduce the number of double bonds, lower the acid value and unsaturation, thereby improving the softening point and thermal stability. The modified rosin is prepared by modifying rosin resin with maleic anhydride. Plasma modification of rosin and maleic anhydride can enhance the mechanical properties, thermal stability, surface quality, and processing performance of wax mold materials. The addition of modified rosin can effectively reduce the shrinkage rate of wax mold materials, thereby improving the dimensional accuracy of castings.

[0021] 3. In this invention, the synergistic effect of paraffin wax and modified microcrystalline wax refines the crystal structure of the wax mold material, enhancing its toughness. Simultaneously, it reduces the shrinkage rate of the wax mold material, minimizing the risk of deformation and making it suitable for complex castings. Modified rosin and benzoic acid-modified zinc acrylate resin work together, chemically improving the hardness and heat resistance of the mold material, as well as its surface properties and interfacial bonding. Benzoic acid modification enhances the resin's hydrolytic stability and improves its compatibility with the wax mold material. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating the preparation process of the casting wax model material for this invention. Detailed Implementation

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Microcrystalline waxes have a fine crystal structure, exhibiting high elasticity, adhesion, and thermal stability, and are miscible with various mineral waxes, plant waxes, and hot fatty oils. The chemical composition of modified microcrystalline waxes mainly includes cycloalkanes, isoalkanes, and a small amount of n-alkanes, with C31-C70 branched saturated hydrocarbons as the primary components. Compared to paraffin wax, microcrystalline waxes have a lower content of n-alkanes and a higher content of cycloalkanes and isoalkanes, resulting in better flexibility, ductility, and adhesion. Modified microcrystalline waxes improve the flowability and stability of wax mold materials by altering the morphology and dispersibility of wax crystals and reducing their aggregation. Through the synergistic effect of microcrystalline wax matrix shaping, polypropylene toughening, high-density polyethylene reinforcement, and stearic acid interfacial lubrication, modified microcrystalline waxes achieve a comprehensive improvement in the mechanical strength, thermal stability, dimensional accuracy, and processing performance of wax mold materials.

[0025] Polypropylene, through blending and modification with microcrystalline wax, improves the tensile strength, stiffness, and heat resistance of the wax, compensates for its insufficient hardness, and reduces the risk of high-temperature deformation. The synergistic effect of polypropylene and microcrystalline wax can promote the dispersion of wax crystals and reduce their aggregation, thereby improving the flowability and stability of the wax molding material.

[0026] High-density polyethylene is a highly crystalline, non-polar thermoplastic resin. Its branched structure fills the gaps between microcrystalline wax molecules, enhancing its ductility and improving the interfacial compatibility between microcrystalline wax and polypropylene. This results in wax mold materials having good mechanical properties, processability, and corrosion resistance.

[0027] The carboxyl group (-COOH) in stearic acid forms chemisorption or ester bonds with the hydroxyl group (-OH) in microcrystalline wax, and its long-chain alkyl group is compatible with microcrystalline wax, thus preventing agglomeration. In addition, stearic acid, as an interface modifier, can improve the compatibility between microcrystalline wax and polypropylene, enhance interfacial bonding, and improve the mechanical properties of modified microcrystalline wax.

[0028] Modified rosin is mainly composed of resin acids, which have a tricyclic skeleton structure, typically containing two double bonds and one carboxyl group, and can react with maleic anhydride. Rosin reacts with maleic anhydride under plasma heating conditions to form maleic anhydride adducts, thereby improving the heat resistance and stability of the rosin. Modified rosin can increase the hardness and strength of wax molding materials and reduce shrinkage. Simultaneously, modified rosin can also enhance the oxidation resistance of wax molding materials, significantly extending their shelf life.

[0029] Benzoic acid can form stable coordination bonds with zinc ions in zinc oxide, enhancing the bonding force between the resin and the metal substrate, and improving the adhesion and corrosion resistance of benzoic acid-modified zinc acrylate resin. During the copolymerization process, the products generated from the reaction of benzoic acid and zinc oxide further stabilize the resin structure, improving its weather resistance and solvent resistance. Simultaneously, benzoic acid modification can also introduce hydrophilic groups, adjusting the surface properties of the resin and affecting the self-polishing performance and anti-fouling effect of the coating. The added zinc oxide can enhance the hardness, flexural strength, and modulus of the acrylic resin. Benzoic acid-modified zinc acrylate resin exhibits better chemical stability, thus maintaining high fluidity in wax molds and extending its service life.

[0030] Modified microcrystalline wax can interact with the carboxyl groups or double bonds in modified rosin through esterification, forming new chemical bonds such as amide bonds or ester bonds, thereby altering the physical and chemical properties of both. In the molten state, modified microcrystalline wax and modified rosin form a homogeneous system through van der Waals forces and chain entanglement. Under the hot melt blending mechanism, the flexibility of microcrystalline wax can inhibit the crystallization tendency of rosin, while the polar groups of rosin esters form weak hydrogen bonds with the branched structure of microcrystalline wax. Benzoic acid-modified zinc acrylate resin and modified rosin have a synergistic effect. Rosin contains carboxyl groups (-COOH) and unsaturated double bonds (-C=C-), while benzoic acid has acidic groups that can undergo esterification with the hydroxyl or carboxyl groups in rosin to form ester bonds (-COO-). This reaction can enhance the crosslinking density and mechanical properties of the resin.

[0031] The addition of fillers can effectively reduce the linear shrinkage and sinking rate of wax mold materials, and improve their dimensional stability and precision. Fillers physically fill the gaps in the wax matrix, inhibiting molecular chain shrinkage and significantly reducing the linear shrinkage rate. Simultaneously, fillers can also act as rigid particles dispersed within the wax matrix, enhancing the flexural strength and elastic modulus of the wax mold material.

[0032] 2,5-Furandiethanol possesses the properties of a diol, which can improve interfacial adhesion between components in wax mold materials, enhance interfacial bonding strength, and make the wax mold structure more stable. Simultaneously, as a surfactant, 2,5-furandiethanol can reduce surface tension, making wax particles easier to disperse in the medium, preventing wax particle re-aggregation, and improving the dispersion stability of the wax. Furthermore, 2,5-furandiethanol can also act as a softener, wetting agent, and binder, improving the flexibility, flowability, and adhesion of the wax mold material, which facilitates wax mold forming and demolding.

[0033] The surfactant 2,5-furandiethanol and the dispersant can produce a synergistic effect in the preparation of wax mold materials. The surfactant can enhance the dispersing ability of the dispersant, while the dispersant can stabilize the micelle structure formed by the surfactant, thereby jointly improving the stability of the wax dispersion system. The dispersant improves the stability of the wax dispersion system by adsorbing onto the surface of wax particles, forming a protective layer, and preventing the interaction between wax particles.

[0034] Toughening agents improve the interfacial bonding force and microphase separation structure of materials, thereby enhancing the toughness, strength, thermal stability, and other mechanical properties of wax mold materials.

[0035] All raw materials used in this invention are commercially available.

[0036] Example 1:

[0037] The casting wax mold material comprises the following components in parts by weight: 50 parts paraffin wax, 25 parts modified microcrystalline wax, 12 parts modified rosin, 8 parts benzoic acid modified zinc acrylate resin, 7 parts cross-linked polystyrene, 5 parts nonylphenol polyoxyethylene ether, 4 parts ethylene-vinyl acetate copolymer, and 2 parts 2,5-furandimethylethanol.

[0038] Modified microcrystalline wax was prepared by the following method: microcrystalline wax, polypropylene, high-density polyethylene and stearic acid were weighed in a mass ratio of 50:8:3:1 and then placed in a homogenizer at a speed of 55 rpm for 30 min to homogenize and blend, thus obtaining modified microcrystalline wax.

[0039] Modified rosin was prepared by the following method: maleic anhydride and rosin resin were mixed evenly at a mass ratio of 1:4, and then treated in a plasma device for 8 minutes to obtain modified rosin. The charge density of the plasma device was 900 C / cm³. 3 The gas flow rate is 1.3 L / min, the pressure is 110 kPa, and the temperature is 35℃.

[0040] Benzoic acid-modified zinc acrylate resin was prepared by the following method: Benzoic acid, zinc oxide and acrylic resin were weighed in a mass ratio of 1:1:25, mixed evenly and placed in a sealed glass bottle. The mixture was then placed in an oven at 35°C for a copolymerization reaction for 3 hours to obtain benzoic acid-modified zinc acrylate resin.

[0041] The method for preparing casting wax model material includes the following steps: S1. Mix paraffin wax, modified microcrystalline wax and modified rosin in a certain proportion and melt them evenly to obtain a base wax liquid.

[0042] S2. Benzoic acid-modified zinc acrylate resin, filler, dispersant, toughening agent and 2,5-furandiethanol are added to the base wax liquid in proportion and mixed evenly to obtain the wax liquid.

[0043] S3. The wax liquid is filtered at a constant temperature of 140℃ and a pressure of 0.6MPa to obtain casting wax mold material. The filter paper has a pore size of 5-8μm.

[0044] Example 2:

[0045] The casting wax mold material comprises the following components in parts by weight: 60 parts paraffin wax, 28 parts modified microcrystalline wax, 16 parts modified rosin, 12 parts benzoic acid modified zinc acrylate resin, 10 parts graphite, 7 parts sodium dihexyl succinate, 6 parts ethylene-vinyl acetate copolymer, and 3 parts 2,5-furandimethyl alcohol.

[0046] Modified microcrystalline wax was prepared by the following method: microcrystalline wax, polypropylene, high-density polyethylene and stearic acid were weighed in a mass ratio of 60:10:5:1 and then placed in a homogenizer at a speed of 60 rpm for 30 min to homogenize and blend, thus obtaining modified microcrystalline wax.

[0047] Modified rosin was prepared by the following method: maleic anhydride and rosin resin were mixed evenly at a mass ratio of 1:5, and then treated in a plasma device for 6 minutes to obtain modified rosin. The charge density of the plasma device was 980 C / cm³. 3 The gas flow rate is 1.4 L / min, the pressure is 115 kPa, and the temperature is 40℃.

[0048] Benzoic acid-modified zinc acrylate resin was prepared by the following method: Benzoic acid, zinc oxide and acrylic resin were weighed at a mass ratio of 2:1:30, mixed evenly and placed in a sealed glass bottle. The mixture was then placed in an oven at 40°C for a copolymerization reaction for 2 hours to obtain benzoic acid-modified zinc acrylate resin.

[0049] The method for preparing casting wax model material includes the following steps: S1. Mix paraffin wax, modified microcrystalline wax and modified rosin in a certain proportion and melt them evenly to obtain a base wax liquid.

[0050] S2. Benzoic acid-modified zinc acrylate resin, filler, dispersant, toughening agent and 2,5-furandiethanol are added to the base wax liquid in proportion and mixed evenly to obtain the wax liquid.

[0051] S3. The wax liquid is filtered at a constant temperature of 150℃ and a pressure of 0.7MPa to obtain casting wax mold material. The filter paper has a pore size of 5-8μm.

[0052] Example 3:

[0053] The casting wax mold material comprises the following components in parts by weight: 55 parts paraffin wax, 26 parts modified microcrystalline wax, 15 parts modified rosin, 10 parts benzoic acid modified zinc acrylate resin, 8 parts filler (graphite and phthalic anhydride in a 1:1 mass ratio), 6 parts dispersant (nonylphenol polyoxyethylene ether and sodium dioctyl succinate in a 1:1 mass ratio), 5 parts toughening agent (polysulfide compound and polyazelic anhydride in a 1:1 mass ratio), and 2.5 parts 2,5-furandimethyl alcohol.

[0054] Modified microcrystalline wax was prepared by the following method: microcrystalline wax, polypropylene, high-density polyethylene and stearic acid were weighed in a mass ratio of 50:10:5:1 and then placed in a homogenizer at a speed of 60 rpm for 30 min to homogenize and blend, thus obtaining modified microcrystalline wax.

[0055] Modified rosin was prepared by the following method: maleic anhydride and rosin resin were mixed evenly at a mass ratio of 1:4-5, and then treated in a plasma device for 7 minutes to obtain modified rosin. The charge density of the plasma device was 950 C / cm³. 3 The gas flow rate is 1.3 L / min, the pressure is 110 kPa, and the temperature is 38℃.

[0056] Benzoic acid-modified zinc acrylate resin was prepared by the following method: Benzoic acid, zinc oxide and acrylic resin were weighed in a mass ratio of 1.5:1:30, mixed evenly and placed in a sealed glass bottle. The mixture was then placed in an oven at 38°C for a copolymerization reaction for 2.5 hours to obtain benzoic acid-modified zinc acrylate resin.

[0057] The method for preparing casting wax model material includes the following steps: S1. Mix paraffin wax, modified microcrystalline wax and modified rosin in a certain proportion and melt them evenly to obtain a base wax liquid.

[0058] S2. Benzoic acid-modified zinc acrylate resin, filler, dispersant, toughening agent and 2,5-furandiethanol are added to the base wax liquid in proportion and mixed evenly to obtain the wax liquid.

[0059] S3. The wax liquid is filtered at a constant temperature of 145℃ and a pressure of 0.6MPa to obtain casting wax mold material. The filter paper has a pore size of 5-8μm.

[0060] Comparative Example 1: The difference from Example 1 is that the modified microcrystalline wax in Example 1 is removed.

[0061] Comparative Example 2: The difference from Example 1 is that the benzoic acid-modified zinc acrylate resin in Example 1 is removed.

[0062] Comparative Example 3: The difference from Example 1 is that the modified rosin in Example 1 is removed.

[0063] Comparative Example 4: The difference from Example 1 is that the microcrystalline wax is not modified.

[0064] Comparative Example 5: The difference from Example 1 is that the zinc acrylate resin is not modified.

[0065] Comparative Example 6: The difference from Example 1 is that the rosin resin is not modified.

[0066] Comparative Example 7: The difference from Example 1 is that 2,5-furandiethanol is removed from Example 1.

[0067] Comparative Example 8: The difference from Example 1 is that the filler in Example 1 is removed.

[0068] Comparative Example 9: The difference from Example 1 is that the toughening agent in Example 1 is removed.

[0069] The casting wax patterns prepared in Examples 1, 2, and 3, and Comparative Examples 1, 2, 3, 4, 5, 6, 7, 8, and 9 were subjected to performance tests. The linear shrinkage rate was determined according to HB 5350.1-2004 "Test Methods for Performance of Investment Casting Molding Materials - Part 1: Determination of Linear Shrinkage Rate"; the flexural strength was determined according to HB 5350.3-2004 "Test Methods for Performance of Investment Casting Molding Materials - Part 3: Determination of Bending Strength"; the ash content was determined according to HB 5350.5-2004 "Test Methods for Performance of Investment Casting Molding Materials - Part 5: Determination of Ash Content"; and the penetration was determined according to GB / T 4985-2024 "Petroleum Wax Penetration Test Method".

[0070] Table 1: Performance Test Table of Wax Modeling Material

[0071] As shown in Table 1, the casting wax mold materials prepared in the examples have lower linear shrinkage, higher flexural strength, and longer penetration compared to the comparative examples. Modified microcrystalline wax can improve the strength of casting wax mold materials, reduce brittle cracks caused by large grains, improve the plasticity of wax molds, and enhance the impact strength and toughness of wax mold materials. The synergistic effect of paraffin wax and modified microcrystalline wax refines the crystal structure of wax mold materials, enhances toughness, and reduces the shrinkage rate of wax mold materials. The addition of modified rosin can effectively reduce the shrinkage rate of wax mold materials, and plasma modification of rosin and maleic anhydride can improve the mechanical properties of wax mold materials. Benzoic acid-modified zinc acrylate resin can enhance interfacial bonding and improve the strength, stability, and other mechanical properties of wax mold materials. Fillers can also be dispersed as rigid particles in the wax base, which can improve the flexural strength and elastic modulus of wax mold materials. 2,5-furandiethanol and dispersants can produce a synergistic effect in the preparation of wax mold materials, reducing surface tension, enhancing interfacial bonding strength, and making the wax mold structure more stable. Toughening agents improve the interfacial bonding and microphase separation structure of materials, thereby enhancing the toughness, strength, thermal stability, and other mechanical properties of wax pattern materials. High penetration and good flowability reduce filling defects such as cold shuts and incomplete filling; low penetration and poor flowability may make it difficult to fill fine structures. The wax pattern material prepared in the example has a long penetration and good flowability, making it suitable for high-precision equipment casting.

[0072] The wax mold materials prepared in Example 1, Comparative Example 2, and Comparative Example 3 were stored at room temperature for 180 days and 360 days, respectively, and their flexural strength was measured. The flexural strength at 0 days represents the flexural strength of the freshly prepared wax mold material. The results are shown in Table 2.

[0073] Table 2: Variation of Flexural Strength of Wax Pattern Material

[0074] As shown in Table 2, the flexural strength of the wax mold materials decreased with prolonged storage time. After 180 days of storage, the flexural strength of the wax mold materials prepared in Example 1, Comparative Example 2, and Comparative Example 3 decreased by 6.7%, 17.2%, and 18.4% respectively compared to day 0. After 360 days of storage, the flexural strength of the wax mold materials prepared in Example 1, Comparative Example 2, and Comparative Example 3 decreased by 17.0%, 39.1%, and 37.8% respectively compared to day 0. This demonstrates that modified rosin can enhance the antioxidant properties of the wax mold materials and extend their storage time. Benzoic acid-modified zinc acrylate resin exhibits better chemical stability, thus maintaining high fluidity in the wax mold materials and extending their service life.

[0075] In summary, the casting wax pattern material prepared by this invention solves the problems of poor thermal stability, high shrinkage, and easy deformation of wax pattern materials by adding various functional components, thereby improving the quality of investment casting. Furthermore, the preparation process of this invention is simple and suitable for large-scale promotion and use.

[0076] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A casting wax model material, characterized in that, The product comprises the following components in parts by weight: 50-60 parts paraffin wax, 25-28 parts modified microcrystalline wax, 12-16 parts modified rosin, 8-12 parts benzoic acid modified zinc acrylate resin, 7-10 parts filler, 5-7 parts dispersant, 4-6 parts toughening agent, and 2-3 parts 2,5-furandimethyl alcohol.

2. The casting wax model material according to claim 1, characterized in that, The modified microcrystalline wax is prepared by the following method: microcrystalline wax, polypropylene, high-density polyethylene and stearic acid are weighed in a mass ratio of 50-60:8-10:3-5:1 and placed in a homogenizer at a speed of 55-60 rpm for 28-30 min to obtain modified microcrystalline wax.

3. The casting wax model material according to claim 1, characterized in that, The modified rosin is prepared by the following method: maleic anhydride and rosin resin are mixed evenly at a mass ratio of 1:4-5 and then treated in a plasma device for 6-8 minutes to obtain modified rosin.

4. The casting wax model material according to claim 1, characterized in that, The benzoic acid-modified zinc acrylate resin is prepared by the following method: benzoic acid, zinc oxide and acrylic resin are weighed at a mass ratio of 1-2:1:25-30, mixed evenly and placed in a sealed glass bottle, and then placed in an oven at 35-40℃ for copolymerization reaction for 2-3 hours to obtain benzoic acid-modified zinc acrylate resin.

5. The casting wax model material according to claim 1, characterized in that, The filler is any one or a mixture of two of cross-linked polystyrene, graphite, and phthalic anhydride.

6. The casting wax model material according to claim 1, characterized in that, The dispersant is any one or a mixture of two of the following: nonylphenol polyoxyethylene ether, sodium dihexyl succinate, sodium dioctyl succinate, and sodium isopropyl naphthalene sulfonate.

7. The casting wax model material according to claim 1, characterized in that, The toughening agent is any one or a mixture of two of the following: ethylene-vinyl acetate copolymer, chlorinated polyethylene, polysulfide compound, and polyazel anhydride.

8. The casting wax model material according to claim 3, characterized in that, The plasma device has a charge density of 900–980 C / cm³. 3 The gas flow rate is 1.3–1.4 L / min, the pressure is 110–115 kPa, and the temperature is 35–40 °C.

9. A method for preparing a casting wax model material according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Mix paraffin wax, modified microcrystalline wax and modified rosin in a certain proportion and melt them evenly to obtain a base wax liquid; S2. Benzoic acid-modified zinc acrylate resin, filler, dispersant, toughening agent and 2,5-furandiethanol are added to the base wax liquid in proportion, and the wax liquid is prepared after being mixed evenly. S3. The wax liquid is filtered at a constant temperature of 140-150℃ and a pressure of 0.6-0.7MPa to obtain casting wax mold material. The filter paper has a pore size of 5-8μm.

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