Wax chaplet for precision casting and preparation method thereof

Abstract

The invention belongs to the technical field of chemical materials, and particularly relates to a wax chaplet for precision casting and a preparation method of the wax chaplet. The wax chaplet for precision casting is prepared from the following raw materials in parts by weight: 40 to 60 parts of basic wax material, 15 to 40 parts of tackifying resin, 15 to 40 parts of lubricant, 0.5 to 10 parts of toughening resin and 0 to 10 parts of natural vegetable wax, wherein the lubricant comprises an inner lubricant, optionally, an inner lubricant, an outer lubricant and optionally, an outer lubricant; on the basis of the total weight of the lubricant, the proportion of the external lubricant is not higher than 40% by weight; or the weight percentage A of the natural vegetable wax to the weight of the lubricant is not more than 40 wt%. Through the ingenious design of the components of the raw materials, the strength and flexibility are balanced, the compatibility with the gum is also considered, and meanwhile, the preparation method is also suitable for different flaking processes such as subsequent extrusion and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical materials, and particularly relates to a wax core support for precision casting and a preparation method thereof. Background Art

[0002] Advanced aircraft engines are crucial core equipment in the aviation sector, and their R&D and manufacturing capabilities are crucial indicators of a nation's core competitiveness in terms of national economic development and national defense security. A key factor in determining the service performance and safety of aircraft engines is nickel-based superalloy hot-end components, such as blades, casings, and guide vanes. Achieving independent intellectual property rights, control, and mass production of key auxiliary materials in their manufacturing will significantly enhance my country's capabilities in developing and producing high-end castings.

[0003] Wax core supports (commonly known as wax sheets or wax paper) are key auxiliary materials in high-temperature alloy precision casting. While market demand is low, they place high demands on performance, particularly dimensional accuracy and a balance between strength and toughness. Currently, these materials are primarily imported. Domestic substitution of these key strategic auxiliary materials is a crucial means of mitigating the risk of technology disruption and ensuring a secure and controllable supply chain. Summary of the Invention

[0004] The inventors of the present invention have discovered that wax core supports need to have excellent bending resistance, that is, they need to be able to not crack at the corners and also need to not rebound when bent. CN104945917A, CN1765994A, CN110684314A, etc. all discuss the preparation of precision casting wax, which is commonly known in the industry as model wax. It is required to have excellent strength, low shrinkage, and a smooth surface. However, when these materials are used as wax core supports, they do not have the bending resistance (no rebound when bent, no cracking at the corners) at all. Further research has found that due to the overly smooth surface, the adhesive backing is also difficult to adhere.

[0005] This invention addresses the practical application characteristics of wax core supports in precision casting and the requirements of wax materials in the film production process. By studying their formulation and selecting a specific raw material combination and ratio, this approach balances strength and flexibility while also taking into account compatibility with adhesive backing, while also adapting to subsequent film production processes such as extrusion. This allows for the successful manufacture of wax core supports (wax sheets) in thicknesses ranging from 0.2mm to 4mm, meeting market demand and precise dimensions. This ensures both the performance requirements of subsequent film production and the end-user's requirements.

[0006] Based on this, the first aspect of the present invention provides a wax core support for precision casting, wherein the raw materials of the wax core support for precision casting include, by weight:

[0007]

[0008] Wherein, the lubricant includes: an internal lubricant, optionally an internal and external lubricant, and optionally an external lubricant;

[0009] Based on the total weight of the lubricant, the external lubricant accounts for no more than 40 weight %; or the weight of the natural plant wax is a percentage of the weight of the lubricant, and the value of A is no more than 40 weight %.

[0010] As a preferred technical solution of the present invention, the raw materials of the wax core support for precision casting include:

[0011]

[0012]

[0013] In the present invention, the raw materials of the wax core support are controlled within the above range, and the wax core support for precision casting finally prepared has better bending resistance, fracture strength, higher dyne value and lower ash content.

[0014] As a preferred technical solution of the present invention, the raw materials of the wax core support for precision casting include:

[0015]

[0016] In the present invention, the raw materials of the wax core support are controlled within the above range, and the wax core support for precision casting finally prepared has better bending resistance, fracture strength, higher dyne value and lower ash content.

[0017] As another preferred technical solution of the present invention, the raw materials of the wax core support for precision casting include:

[0018]

[0019] In the present invention, the raw materials of the wax core support are controlled within the above range, and the wax core support for precision casting finally prepared has better bending resistance, fracture strength, higher dyne value and lower ash content.

[0020] As a preferred technical solution of the present invention, based on the total weight of the lubricant, the external lubricant accounts for 5-40% by weight, preferably 15-25% by weight, for example, 15% by weight, 18% by weight, 20% by weight, 25% by weight, etc.

[0021] In the present invention, the study found that controlling the proportion of external lubricant within the above range can better improve the comprehensive performance of the wax core support for precision casting, especially can make the wax core support for precision casting have a better dyne value. It is speculated that this is because the external lubricant can ensure basic lubrication, and the external lubricant at this content can be distributed on the surface in the form of discontinuous islands or dots, or the film formed is very thin and not dense. The polar surface provided by the tackifying resin still has the opportunity to "penetrate" this incomplete lubricating film or occupy a larger surface area, thereby allowing the wax core support for precision casting to obtain a high surface energy (high dyne value). When the external lubricant is added in too much amount, the external lubricant migrates to the surface of the wax core support to form a continuous, dense low surface energy layer, reducing the high surface energy effect brought by the tackifying resin.

[0022] As another preferred technical solution of the present invention, the value of A is 1-30 weight%, 5-10 weight%, for example, 5 weight%, 7 weight%, 8.7 weight%, 9 weight%, 10 weight%, etc.

[0023] In the present invention, research has found that controlling the weight of natural plant wax as a percentage of the weight of the lubricant within the above-mentioned range can better increase the comprehensive performance of the wax core support for precision casting, especially can make the wax core support for precision casting have a better dyne value. It is speculated that this is because the natural plant wax in the above-mentioned range can synergize with the tackifying resin to further enhance the surface polarity. When the amount thereof is too much, the surface energy may be slightly reduced due to the hydrophobicity of the wax.

[0024] The basic wax material is the core material for making wax patterns in precision casting. As a preferred technical solution of the present invention, the basic wax material includes a combination of paraffin wax and microcrystalline wax.

[0025] In the present invention, paraffin wax can provide good melt fluidity for the system, and microcrystalline wax can provide higher strength and toughness. In the present invention, using paraffin wax and microcrystalline wax together as basic wax materials can better improve the comprehensive performance of the wax core support for precision casting.

[0026] The paraffin wax in the present invention can be obtained commercially, and is preferably Kunlun 58 fully refined paraffin wax.

[0027] The microcrystalline wax in the present invention can be obtained commercially, and is preferably 80B microcrystalline wax from Fushun Petrochemical.

[0028] As a preferred technical solution of the present invention, the weight ratio of the paraffin wax to the microcrystalline wax is 1:(1-2), for example, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.31, 1:1.32, 1:1.4, 1:1.5, 1:1.7, 1:1.8, 1:1.9 or 1:2.

[0029] As a preferred technical solution of the present invention, the tackifying resin includes at least one of C5 petroleum resin, C9 petroleum resin, rosin resin and modified rosin resin, preferably includes C5 petroleum resin and / or C9 petroleum resin, more preferably C9 petroleum resin.

[0030] The tackifying resin in the present invention can be obtained commercially, and preferably the C9 petroleum resin is Hengtai Petrochemical H9-90C9 petroleum resin.

[0031] As a technical solution of the present invention, the lubricant is an internal lubricant.

[0032] In the present invention, "optionally internal and external lubricants" means that the internal and external lubricants may be contained or not.

[0033] In another technical solution of the present invention, the lubricant includes an internal lubricant and an internal and external lubricant. Preferably, the weight ratio of the internal lubricant to the internal and external lubricants is (5-20):1, preferably (10-15):1, for example, 10:1, 11.5:1, 13:1, 14:1 or 15:1.

[0034] In the present invention, "optionally an external lubricant" means that the external lubricant may be contained or not.

[0035] In another technical solution of the present invention, the lubricant includes an internal lubricant and an external lubricant. Preferably, the weight ratio of the internal lubricant to the external lubricant is (2-5):1, for example, 2:1, 3:1, 4:1, 5:1, etc.

[0036] As a technical solution of the present invention, the internal lubricant is selected from at least one of ethylene bisstearamide, montan wax, glycerol monostearate, stearic acid and Sasol wax H1.

[0037] As a preferred technical solution of the present invention, the weight content of stearic acid in the internal lubricant is 70-95 weight%, for example, 70 weight%, 78 weight%, 82 weight%, 83 weight%, 85 weight%, 88 weight%, 90 weight%, 92 weight%, 93 weight%, 95 weight%, preferably 75-90 weight%.

[0038] In the present invention, the research found that when the amount of stearic acid used is too much or too little, the comprehensive performance of the wax core support for precision casting is reduced. It is speculated that this is because the addition of stearic acid can help extrusion, and greater pressure is required during extrusion, which can easily cause product deformation or breakage. Stearic acid and the polar groups of the tackifying resin can form hydrogen bonds to jointly maintain high surface energy. However, when the amount is too much, the excess stearic acid will crystallize independently, and the crystal structure of the base wax material is incompatible. In addition, when the content of stearic acid is too high, the excess stearic acid will occupy the surface sites and block the effective exposure of the polar groups of the tackifying resin.

[0039] As a preferred technical solution of the present invention, the internal lubricant includes montan wax, stearic acid and sasol wax H1. Preferably, the weight ratio of montan wax, stearic acid and sasol wax H1 is (0.05-0.2):1:(0.1-0.3), for example, 0.05:1:0.1, 0.08:1:0.12 or 0.11:1:0.167.

[0040] As another preferred technical solution of the present invention, the internal lubricant includes stearic acid and sasol wax H1. Preferably, the weight ratio of stearic acid to sasol wax H1 is (0.05-0.3):1, for example, 0.05:1, 0.08:1, 0.11:1, 0.13:1, 0.15:1, 0.2:1, 0.21:1, 0.23:1, 0.25:1, 0.28:1, 0.3:1, etc.

[0041] As a preferred technical solution of the present invention, the internal and external lubricants are selected from stearamide.

[0042] As a preferred technical solution of the present invention, the external lubricant is selected from at least one of AC6 polyethylene wax, lead stearate, polypropylene wax and Fischer-Tropsch wax, preferably AC6 polyethylene wax.

[0043] The toughening resin in the present invention can improve toughness. As a preferred technical solution of the present invention, the toughening resin is selected from EVA resin.

[0044] The EVA resin in the present invention can be obtained commercially, for example, EVA3 wax produced by BASF Luwax EVA3 in Germany.

[0045] As a preferred technical solution of the present invention, the natural plant wax is selected from at least one of carnauba wax T3, rice bran wax, sunflower wax and jojoba wax, preferably carnauba wax T3.

[0046] The second aspect of the present invention provides a method for preparing the wax core support for precision casting according to the first aspect of the present invention, the preparation method comprising:

[0047] The raw materials of the wax core support for precision casting are added to a closed wax melting kettle with a stirring device, and heated at 110-125°C. After all the raw materials are completely melted, the temperature is raised by 5-10°C and kept warm for 1-2 hours to obtain a molten material; the molten material is sent to an extruder for extrusion in a twin-screw extruder to obtain a strip of wax material, which is then pressed into sheets.

[0048] In the present invention, the extrusion conditions are not particularly limited, and the extrusion temperature is generally in the range of 45 to 65°C.

[0049] As a preferred technical solution of the present invention, the conditions for tableting include: introducing the strip wax material into the roller gap of the tablet press, adjusting the initial pressing roller distance to 2-8 mm, then adjusting the fine pressing roller distance to 0.2-4 mm, and after the sheet is formed, it is shaped by a cooling conveyor belt (10-15°C air cooling) and cut.

[0050] In the present invention, the thickness of the wax core support for corresponding precision casting can be obtained by adjusting the precision pressing roller distance.

[0051] After cutting, the present invention can be left to stand in a constant temperature room (25±2℃) for 24 hours to eliminate internal stress, and then the upper and lower surfaces can be covered with adhesive and silicone oil protective paper for storage or sent to the application end. When in use, first select the corresponding thickness, then cut out the required shape with a knife, remove the silicone oil protective paper, and stick it to the surface of the wax mold to accurately increase the thickness of the wax mold, instead of modifying the mold, saving time and labor; or cut the wax paper of a specific thickness into small pieces and stick it on the surface of the ceramic core required for the production of hollow blades, so as to accurately control the thickness of the wax mold on the surface of the ceramic core when pressing the wax, and finally accurately control the wall thickness of the hollow blade. At the same time, it can also be used for layer reduction in the shell making stage of high-temperature alloy precision casting. After reaching a certain number of layers in the shell making process, the wax sheet is cut into the shape that needs to be reduced, and pasted to the layer reduction position. Then, during the slurry coating and sanding process, the slurry and sand material on the wax sheet are removed to achieve the purpose of layer reduction.

[0052] Compared with the prior art, the present invention has at least the following beneficial effects:

[0053] This invention addresses the practical application characteristics of wax cores in precision casting and the requirements for wax materials in the film production process. Through the ingenious design of the raw material components, this invention balances strength and flexibility while also taking into account compatibility with adhesive backing. It also adapts to various subsequent film production processes, such as extrusion. This allows for the successful production of wax cores (wax sheets) with precise dimensions and thicknesses ranging from 0.2mm to 4mm, meeting market demands. DETAILED DESCRIPTION

[0054] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0055] In the following embodiments:

[0056] Example 1

[0057] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0058] 22 parts of Kunlun 58 fully refined paraffin wax, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 19 parts of stearic acid, 14 parts of Sasol wax H, 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany, and 32 parts of Carnauba wax T.

[0059] This embodiment provides a method for preparing a wax core support for precision casting, comprising:

[0060] The raw materials of the wax core support for precision casting are added to a closed wax melting kettle of a stirring device, heated at 120°C, and after all the raw materials are completely melted, the temperature is raised to 125°C, kept warm for 1 hour, and granulated by a granulator for later use; the heated wax particles are sent to an extruder for extrusion in a twin-screw extruder to obtain a strip of wax material (the extrusion temperature range is 45-65°C); then the strip of wax material is introduced into the roller gap of a tablet press, the initial pressing roller distance is adjusted to 4mm, and then the fine pressing roller distance is adjusted to 2mm. After the sheet is formed, it is shaped by a cooling conveyor belt (10°C air cooling), cut, and allowed to stand in a constant temperature room (25±2°C) for 24 hours to eliminate internal stress to obtain the wax core support for precision casting.

[0061] Example 2

[0062] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0063] 22 parts of Kunlun 58 fully refined paraffin wax, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 2 parts of montan wax, 18 parts of stearic acid, 13 parts of Sasol wax H, 2 parts of AC6 polyethylene wax, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0064] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0065] Example 3

[0066] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0067] 22 parts of Kunlun 58 fully refined paraffin wax, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 2 parts of montan wax, and 25 parts of stearic acid.

[0068] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0069] Example 4

[0070] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0071] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 2 parts of montan wax, 18 parts of stearic acid, and 7 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0072] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0073] Example 5

[0074] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0075] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 29 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 18 parts of stearic acid, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0076] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0077] Example 6

[0078] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0079] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 18 parts of stearic acid, 12 parts of Sasol wax H, 5 parts of stearamide, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0080] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0081] Example 7

[0082] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0083] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 13.5 parts of stearic acid, 11.5 parts of Sasol wax H, 10 parts of stearamide, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0084] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0085] Example 8

[0086] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0087] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 20 parts of stearic acid, 5 parts of octadecyl amide, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0088] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0089] Example 9

[0090] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0091] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 10 parts of stearic acid, 10 parts of Sasol wax H1, 5 parts of stearamide, and 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany.

[0092] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0093] Example 10

[0094] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0095] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 23 parts of stearic acid, 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany, and 32 parts of Carnauba wax T.

[0096] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0097] Example 11

[0098] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0099] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 12 parts of stearic acid, 111 parts of Sasol wax H1, 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany, and 32 parts of Carnauba wax T.

[0100] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0101] Example 12

[0102] This embodiment provides a raw material for a wax core support for precision casting, which comprises, by weight:

[0103] 22 parts of Kunlun 58 fully refined paraffin, 29 parts of Fushun Petrochemical 80B microcrystalline wax, 22 parts of Hengtai Petrochemical H9-90 C9 petroleum resin, 15 parts of stearic acid, 13 parts of Sasol wax H, 2 parts of EVA3 wax from BASF Luwax EVA3 of Germany, and 37 parts of Carnauba wax T.

[0104] This embodiment provides a method for preparing a wax core support for precision casting: the same as that of Example 1.

[0105] Performance Testing

[0106] The wax core supports for precision casting in the examples were used as test samples to perform the following performance tests.

[0107] 1. Dyne value test: Use a dyne pen to test the dyne value of the test sample. The larger the dyne value, the better the uniformity of the test sample on the surface and the easier it is to adhere. Conversely, the test sample is more likely to have defects such as bubbles and pits after the glue is applied. The adhesion durability of the test sample's backing glue will also deteriorate.

[0108] 2. Fracture Strength Test: Test the fracture strength of the test sample according to GB / T 14235.2. Fracture strength refers to the three-point bending strength, and deformation is the deformation at the point of maximum force. The greater the strength, the smaller the deformation, the better.

[0109] 3. Ring and ball softening point test: Test the test samples with reference to GB / T 4507 and ASTM E28.

[0110] 4. Thickness Deviation Test: The thickness of the test sample was tested using a Mitutoyo Model 7301 thickness gauge. Ten points were measured at different locations, and the standard deviation of the ten thicknesses obtained was used as the thickness deviation of the test sample.

[0111] 5. Ash content test: refer to GB / T14235.3-1993 and ASTMD482 to test the ash content of the experimental samples. If the ash content is ≤0.02%, it is qualified, otherwise it is unqualified.

[0112] The test results are shown in Table 1.

[0113] Table 1 Performance test results

[0114]

[0115] From the above implementation, it can be seen that the wax core support for precision casting in the present invention not only balances strength and flexibility, but also takes into account compatibility with the adhesive, and is also suitable for subsequent different film making processes such as extrusion.

[0116] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A wax core support for precision casting, characterized in that: The raw materials of the wax core support for precision casting include, by weight: Wherein, the lubricant includes: an internal lubricant, optionally an internal and external lubricant, and optionally an external lubricant; Based on the total weight of the lubricant, the proportion of the external lubricant is not higher than 40 weight %; or the weight of the natural plant wax is a percentage of the weight of the lubricant, and the value of A is not greater than 40 weight %.

2. The wax core support for precision casting according to claim 1, characterized in that: Based on the total weight of the lubricant, the external lubricant accounts for 5-40% by weight; Alternatively, the value of A is 1-30 wt%.

3. The wax core support for precision casting according to claim 1, characterized in that: The base wax material includes a combination of paraffin wax and microcrystalline wax.

4. The wax core support for precision casting according to claim 1, characterized in that: The tackifying resin includes at least one of C5 petroleum resin, C9 petroleum resin, rosin resin and modified rosin resin.

5. The wax core support for precision casting according to claim 1, characterized in that: The lubricant is an internal lubricant; Or, the lubricant includes an internal lubricant and an internal and external lubricant; Alternatively, the lubricant includes an internal lubricant and an external lubricant.

6. The wax core support for precision casting according to any one of claims 1 to 5, characterized in that: The internal and external lubricants are selected from stearamide.

7. The wax core support for precision casting according to any one of claims 1 to 5, characterized in that: The external lubricant is selected from at least one of AC6 polyethylene wax, lead stearate, polypropylene wax and Fischer-Tropsch wax.

8. The wax core support for precision casting according to any one of claims 1 to 5, characterized in that: The toughening resin is selected from EVA resin; the natural plant wax is selected from at least one of carnauba wax T3, rice bran wax, sunflower wax and jojoba wax.

9. A method for preparing a wax core support for precision casting according to any one of claims 1 to 8, characterized in that: The preparation method comprises: adding raw materials of a wax core support for precision casting into a closed wax melting kettle of a stirring device, heating at 110-125° C., raising the temperature by 5-10° C. after all the raw materials are completely melted, and keeping the temperature for 1-2 hours to obtain a molten material; feeding the molten material into an extruder, extruding it in a twin-screw extruder to obtain a strip-shaped wax material, and then pressing and forming the material into sheets.

10. The method for preparing a wax core support for precision casting according to claim 9, characterized in that: The tableting conditions include: introducing the strip wax material into the roller gap of the tablet press, adjusting the initial pressing roller distance to 2-8 mm, then adjusting the fine pressing roller distance to 0.2-4 mm, shaping the tablets on a cooling conveyor belt, and cutting.

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