Wax mold chassis mold, wax mold chassis, preparation method and wax mold assembling device

Abstract

The invention relates to a wax mold chassis mold, a wax mold chassis, a preparation method and a wax mold assembling device, and relates to the technical field of precision casting. The wax pattern chassis mold comprises a chassis mold body and a supporting disc. Wherein the chassis mold body comprises a first chassis mold and a second chassis mold; wherein the second chassis mold is arranged in the first chassis mold, so that an annular chassis structure is formed between the first chassis mold and the second chassis mold; the supporting disc is detachably connected with the first base plate mold so that the supporting disc can be arranged in the annular base plate structure between the first base plate mold and the second base plate mold, and a gap exists between the disc body part of the supporting disc and the disc body part of the first base plate mold. The method is mainly used for solving the problem that in the large module preparation technology, a wax mold base plate is prone to being uneven; and the problem that in the wax piece tree assembling process, due to inconvenience of personnel operation, the preparation period is prolonged is further solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision casting, further relates to the technical field of precision casting of aero-engine blade, and particularly relates to a wax mold base mold, a wax mold base, a preparation method, and a wax mold group tree device. BACKGROUND

[0002] Single crystal turbine blade is a key component of an aero-engine and a gas turbine, and is a significant symbol of the level of a national aviation industry. The part is an aero-engine part that is severely monopolized and blocked, and has the characteristics of low qualification rate, long production cycle, and complex production process.

[0003] The breakthrough of the single crystal turbine blade preparation technology not only improves the overall performance of the engine, but also enhances the competitiveness and independent innovation capability of the national aviation industry. At present, the commonly used small module group in industrial production can cast 6-8 blades at a time, and the production quantity is small and the production cost is high. Therefore, a single crystal blade large module preparation technology is urgently needed to improve the production efficiency.

[0004] The single crystal turbine blade mainly adopts the investment precision casting process, and the preparation of the wax mold is the first step of the process. In the large module preparation technology, the size of the water-cooled disc needs to be increased due to the large number of modules. The water-cooled disc is a metal device for placing the shell in the single crystal furnace during the casting process of the single crystal turbine blade, and the size of the water-cooled disc is consistent with the size of the bottom of the shell. Therefore, the size of the wax mold base during the preparation of the shell needs to be consistent with the size of the wax mold base. When the size of the water-cooled disc increases, the size of the bottom of the shell also needs to increase, and the size of the wax mold base for making the shell also needs to increase. However, the large module preparation technology at least has the following problems:

[0005] (1) The size of the water-cooled disc is large, and the wax mold base needs to be matched. For the preparation of the large-size wax mold base, due to the large volume and surface area of the wax, the volume shrinks during the solidification process, and the stress generated is large, thereby causing the wax mold base to be uneven. In the subsequent preparation, the bottom of the shell is uneven, and it is easy to cause the metal liquid to leak from the bottom during the casting process, resulting in failure to fill the mold.

[0006] (2) The diameter of the water-cooled disc of the small module group is 160 mm, and the diameter of the water-cooled disc of the large module group is greater than or equal to 400 mm. During the module assembly process, the water-cooled disc needs to be manually rotated to sequentially bond the wax parts. After the size of the water-cooled disc increases, it is relatively difficult for the operator to rotate the large-size water-cooled disc wax mold, especially as the number of wax part groups increases and the weight of the wax mold increases, the operation is not convenient, and the rotation is easy to cause the assembled wax parts to fall off, so extra care is needed to slowly rotate, increasing the preparation time. Therefore, due to the increase in the size of the water-cooled disc, the inconvenience of personnel operation during the wax part group tree process increases the preparation cycle, and seriously affects the application of the single crystal turbine blade large module preparation technology. SUMMARY

[0007] Therefore, the present application provides a wax mold base mold, a wax mold base and a preparation method, and a wax mold group device, and mainly aims to solve the problem that the wax mold base is easily uneven in the large mold group preparation technology.

[0008] To achieve the above-mentioned purpose, the present application mainly provides the following technical solutions:

[0009] In one aspect, the embodiment of the present application provides a wax mold base mold, wherein the wax mold base mold comprises:

[0010] The base mold body comprises a first base mold and a second base mold; wherein the second base mold is arranged in the first base mold, so as to form an annular base structure between the first base mold and the second base mold;

[0011] The support disc is detachably connected with the first base mold, so that the support disc is arranged in the annular base structure between the first base mold and the second base mold, and there is a gap between the disc body of the support disc and the disc body of the first base mold.

[0012] Preferably, the material of the support disc is metal, preferably aluminum alloy or stainless steel.

[0013] Preferably, a first clamping structure is arranged at the outer edge of the support disc; a second clamping structure is arranged on the outer edge wall of the first base mold; wherein the first clamping structure and the second clamping structure are matched; preferably, the first clamping structure is a support column in a convex shape; and the second clamping structure is a groove.

[0014] Preferably, a wax injection port is arranged on the first base mold, which is used for injecting wax material into the annular base structure and wrapping the support disc with the wax material; preferably, the angle between the wax injection port and the outer edge of the first base mold is 5°-30°.

[0015] In another aspect, the embodiment of the present application provides a wax mold base, wherein a support disc is embedded in the wax mold base; preferably, the support disc is a metal support disc.

[0016] In still another aspect, the embodiment of the present application further provides a preparation method of the above-mentioned wax mold base, wherein the wax mold base is prepared by using any one of the above-mentioned wax mold base molds.

[0017] Preferably, the method for preparing the wax mold base comprises the following steps: injecting wax material into the annular base structure formed between the first base mold and the second base mold of the wax mold base mold through the wax injection port, and after the wax material is filled, the wax material wraps the support plate, and after the base mold body is removed, the wax mold base is obtained; preferably, the injection molding temperature of the wax material is 55-75 DEG C; preferably, the wax mold base mold needs to be preheated before injecting the wax material into the wax mold base mold, wherein the preheating temperature is 20-100 DEG C; preferably, the injection molding time is 5-20 min, the injection molding pressure is 15-30 kg / cm 2 , and the holding time is 20-180 s.

[0018] In another aspect, the wax mold assembly device comprises:

[0019] a rotating device;

[0020] a rotating disc, the rotating device being connected to the rotating disc and used for driving the rotating disc to rotate

[0021] one or more wax mold bases, the wax mold bases being installed on the rotating disc; wherein the wax mold base is the wax mold base described above;

[0022] a control system, the control system being connected to the rotating device and used for controlling the rotating device.

[0023] Preferably, each of the wax mold bases and the rotating disc is connected through a support bolt.

[0024] Preferably, the rotating device comprises:

[0025] a rotating motor, the rotating motor being connected to the control system;

[0026] a transmission mechanism, the transmission mechanism being connected to the rotating disc and used for driving the rotating disc to rotate;

[0027] Preferably, the transmission mechanism comprises: the transmission mechanism comprises a first transmission rod, a first transmission gear, a second transmission gear and a second transmission rod;

[0028] wherein the first transmission rod is in transmission connection with the first transmission gear; the first transmission gear is in transmission connection with the second transmission gear; the second transmission gear is in transmission connection with the second transmission rod; and the second transmission rod is in driving connection with the rotating disc;

[0029] Preferably, the diameter ratio of the pitch circles of the first transmission gear and the second transmission gear is 1:2-1:10.

[0030] Compared with the prior art, the wax model chassis mold, wax model chassis and preparation method, and wax model tree assembly device of the present invention have at least the following beneficial effects:

[0031] On the one hand, an embodiment of the present invention provides a wax mold chassis mold. By further providing a support plate on the basis of a chassis mold body including a first chassis mold and a second chassis mold, the support plate only needs to be placed in an annular chassis structure between the first chassis mold and the second chassis mold, and there is a gap between the plate body of the support plate and the plate body of the first chassis mold. In this way, when the wax material is subsequently injected and filled, the wax material will wrap around the support plate, and the wax mold chassis finally formed is a wax mold chassis with a support plate embedded therein, and the support plate has a certain rigidity. Here, through the supporting effect of the support plate with excellent rigidity, the problem of "the increase in the size of the water cooling plate in the large module preparation technology makes the stress generated during the solidification shrinkage process of the wax mold larger, thereby causing the wax mold chassis to be uneven" is solved, thereby improving the flatness of the bottom of the mold shell and suppressing the leakage of molten metal during the casting process. It should be noted that when the support plate is not added, due to the large volume of the wax material, the volume shrinkage during the solidification process will cause the wax mold chassis to be uneven. When the support plate is embedded inside, the support plate has a certain rigidity, which on the one hand plays a supporting role, thereby reducing the volume shrinkage of the wax during solidification. On the other hand, the support plate will occupy a part of the space, reducing the volume of the wax.

[0032] Furthermore, an embodiment of the present invention provides a wax mold chassis mold, wherein the chassis mold body includes a first chassis mold and a second chassis mold; wherein the second chassis mold is placed in the first chassis mold so that an annular chassis structure is formed between the first chassis mold and the second chassis mold. It should be noted here that by replacing the second chassis mold of different sizes, the area of ​​the annular chassis structure can be adjusted, and then the size of the wax mold chassis can be adjusted. Therefore, the embodiment of the present invention uses a plurality of metal molds in combination, and uses the size of the inner mold of the metal chassis to control the size of the wax mold chassis, thereby realizing the controllability of the number of group trees of large module castings. The wax mold chassis prepared by this method can achieve multi-row group trees, shortening the preparation cycle and reducing the preparation cost.

[0033] On the other hand, an embodiment of the present invention provides a wax model tree assembly device, wherein the wax model tree assembly device includes: a rotating device, a rotating disk, a wax model chassis, and a control system. The rotating device is connected to the rotating disk, and is used to drive the rotating disk to rotate the wax model chassis installed on the rotating disk; wherein the wax model chassis is the above-mentioned wax model chassis; the control system is connected to the rotating device, and is used to control the rotating device. Here, the embodiment of the present invention adopts an electronically controlled transmission device to carry out large-module wax model tree assembly, and the wax model chassis is electrically controlled to rotate at a uniform speed to assemble the single crystal blade onto the wax model chassis. The advantage is that it increases the operability of the large-module wax model, reduces the manual rotation process of the large-size chassis, reduces the preparation time of the large-module wax model, and improves the preparation efficiency.

[0034] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application and to implement the content of the description, the following will be described in detail with the preferred embodiments of the present application and with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structure schematic diagram of a wax mold base mold provided for an embodiment of the present application.

[0036] Figure 2 A top view of a wax mold base mold provided for an embodiment of the present application.

[0037] Figure 3 A structure schematic diagram of a wax mold assembling device provided for an embodiment of the present application.

[0038] Figure 4 A structure schematic diagram of a rotating device provided for an embodiment of the present application.

[0039] Figure 5 A mold shell pouring diagram prepared by using the wax mold assembling device provided for an embodiment of the present application.

[0040] Figure 6 A mold shell pouring diagram prepared by using a conventional wax mold assembling device. DETAILED DESCRIPTION

[0041] In order to further illustrate the technical means and effects taken by the present application to achieve the predetermined invention purposes, the following will be described in detail with the preferred embodiments, the specific implementation manners, structures, features and effects according to the present application, with the accompanying drawings. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0042] The technical problem to be solved by the present application is to solve the problem of unevenness of the wax mold base caused by size effect in the process of precision investment casting of large mold group single crystal blades, and further to solve the problem of difficult operation of wax assembly, so as to improve the yield of large mold group single crystal blades, shorten the preparation period and reduce the preparation cost. These purposes are helpful to improve the performance of aero-engines, promote the development of wax mold preparation in the field of precision investment casting of aero-engines, and improve the level of national aviation industry.

[0043] It should be noted that, in the process of preparing single crystal blades, the first step is to assemble the wax mold, press the wax parts by using the mold, form the single crystal blade wax mold by wax assembly, and then prepare the single crystal blade by shell preparation and pouring. Therefore, the present application solves the problem of uneven base and easy leakage, further solves the problem of difficult operation of large mold group assembly, and improves the yield of single crystal blade preparation.

[0044] The application is described in detail below through specific embodiments.

[0045] Embodiment 1

[0046] In one aspect, the embodiment provides a wax mold base mold, as shown in Figure 1 and Figure 2 The wax mold base mold of the embodiment comprises a base mold body 2 and a support plate 3. The base mold body 2 comprises a first base mold 5 and a second base mold 4. It should be noted that the first base mold 5 is also referred to as an outer sleeve base mold, and the second base mold is also referred to as an inner sleeve base mold. The second base mold 4 is arranged in the first base mold 5 (preferably at the middle position) to form an annular base structure between the first base mold 5 and the second base mold 4. The support plate 3 is detachably connected with the first base mold 5, so that the support plate 3 is arranged in the annular base structure between the first base mold 5 and the second base mold 4, and there is a gap between the disc body of the support plate 3 and the disc body of the first base mold 5.

[0047] It should be noted that the wax mold base mold provided by the embodiment further comprises a support plate 3 based on the base mold body 2 comprising the first base mold 5 and the second base mold 4. The support plate 3 is arranged in the annular base structure between the first base mold 5 and the second base mold 4, and there is a gap between the disc body of the support plate 3 and the disc body of the first base mold 5. In this way, when the wax is injected and molded subsequently, the wax will wrap the support plate 3, and the final wax mold base is a wax mold base in which the support plate is inlaid. The support plate has a certain rigidity, and through the support of the support plate with excellent rigidity, the unevenness caused by the solidification shrinkage of the large mold group wax mold base is reduced, the unevenness of the mold shell is reduced, and the metal liquid leakage phenomenon in the casting process is inhibited.

[0048] In addition, it should be noted that the embodiment is used in combination with multiple metal molds, and the size of the wax mold base is adjusted by using the metal base inner sleeve mold (the second base mold), so that the adjustability of the number of large mold group casting trees is achieved. The wax mold base prepared by the method can achieve multiple rows of trees, shorten the preparation period, and reduce the preparation cost.

[0049] Preferably, the material of the support plate is metal, preferably aluminum alloy and stainless steel, and further preferably high-strength aluminum alloy and stainless steel.

[0050] Embodiment 2

[0051] The embodiment provides a wax mold base mold, as shown in Figure 1 and Figure 2 Compared with the previous embodiment, the embodiment is further designed as follows:

[0052] In order to realize the detachable connection of the support disc 3 and the first bottom disc mold 5, the first clamping structure is arranged at the outer edge of the support disc 3; the second clamping structure is arranged on the outer edge wall of the first bottom disc mold 5; and the first clamping structure and the second clamping structure are matched. Preferably, the first clamping structure is a support column 6 in a convex shape, and the second clamping structure is a groove.

[0053] Preferably, the first bottom disc mold 5 is provided with a wax injection opening 1; and the wax injection opening 1 is arranged on the outer edge wall of the first bottom disc mold 5. Preferably, the angle between the wax injection opening 1 and the outer edge of the first bottom disc mold 5 is 5°-30°.

[0054] Embodiment 3

[0055] In another aspect, the embodiment provides a wax mold bottom disc, wherein the support disc is embedded in the wax mold bottom disc; and preferably, the support disc is a metal support disc.

[0056] It should be noted that: since the wax mold bottom disc provided by the embodiment is embedded with the support disc, the support disc has excellent rigidity, so that the unevenness caused by the solidification shrinkage of the large mold group wax mold bottom disc is reduced, the unevenness of the mold shell is reduced, and the metal liquid leakage phenomenon in the casting process is inhibited.

[0057] Embodiment 4

[0058] The embodiment further provides a preparation method of the wax mold bottom disc based on the embodiment 3, wherein the preparation method comprises the following steps: injecting the wax material into the annular bottom disc structure formed between the first bottom disc mold and the second bottom disc mold of the wax mold bottom disc mold through the wax injection opening; after the wax material is filled, the wax material wraps the support disc; and after the bottom disc mold body is removed, the wax mold bottom disc is obtained.

[0059] The process parameters are set as follows: the injection molding temperature of the wax material is 55-75℃; before the wax material is injected into the wax mold bottom disc mold, the wax mold bottom disc mold needs to be preheated, and the preheating temperature is 20-100℃; the injection molding time is 5-20min, the injection molding pressure is 15-30kg / cm 2 , and the pressure maintaining time is 20-180s (the pressure maintaining time herein refers to the time required for pressure maintaining after the wax material is injected into the mold).

[0060] It should be noted that: the existing wax mold bottom disc mold is not preheated before wax injection. However, for the wax mold bottom disc mold of the embodiment, since the support disc needs to be wrapped in the wax material, the wax mold bottom disc mold needs to be preheated to reduce the temperature difference between the support disc and the wax material.

[0061] Embodiment 5

[0062] In still another aspect, the embodiment provides a wax mold group tree device, as shown in Figure 3 and Figure 4 , wherein the wax mold group tree device comprises a rotating device 8, a rotating disc 9, one or more wax mold base plates 7, and a control system 17. The rotating device 8 is connected to the rotating disc 9 and is used to drive the rotating disc 9 to rotate. The wax mold base plate 7 is installed on the rotating disc 7. The wax mold base plate 7 is the wax mold base plate described in Embodiment 3. The control system 17 is connected to the rotating device 8 and is used to control the operation of the rotating device 8.

[0063] Preferably, each wax mold base plate 7 and the rotating disc 9 are connected by a support bolt 10 (a bolt hole needs to be formed on the wax mold base plate 7). A bolt hole for installing the support bolt 10 is formed on the rotating disc 9.

[0064] Preferably, the rotating device comprises a rotating motor 11 and a transmission mechanism. The rotating motor 11 is connected to the control system 17. The transmission mechanism comprises a first transmission rod 12, a first transmission gear 14, a second transmission gear 15, and a second transmission rod 13. The first transmission rod 12 is in transmission connection with the first transmission gear 14. The first transmission gear 14 is in transmission connection with the second transmission gear 15. The second transmission gear 15 is in transmission connection with the second transmission rod 13. The second transmission rod 13 is in driving connection with the rotating disc 9.

[0065] Preferably, the diameters of the pitch circles of the first transmission gear and the second transmission gear are in a ratio of 1:2-1:10, so as to facilitate the control of the rotating speed of the rotating disc 9.

[0066] Preferably, the rotating device is installed in a transmission box body 16. The upper end of the second transmission rod 13 extends out of the box body 16 and is connected to the bottom of the rotating disc 9.

[0067] When the large mold group wax mold is formed in this embodiment, the prepared wax mold base plate 7 is installed on the rotating disc 9. Then, the control device 11 is turned on and the rotating device 8 is controlled to drive the wax mold base plate to rotate at a constant speed, so as to form the large mold group wax mold.

[0068] It should be noted that the large mold group wax mold is formed by using the electric control transmission device in this embodiment. The single crystal blade is formed on the wax mold base plate by electric control and rotation at a constant speed. The advantage is that the operability of the large mold group wax mold is increased, the process of manually rotating the large size base plate is reduced, the preparation time of the large mold group wax mold is reduced, and the preparation efficiency is improved.

[0069] The following will be further described through specific experimental embodiments as follows:

[0070] Experimental Embodiment 1

[0071] The shell preparation and single crystal casting process were carried out by using the wax mold assembling device described in Example 5. Since the support plate in the wax mold base has a certain rigidity and deformation resistance, it is supported by the metal plate during the wax solidification process, reducing the deformation of the wax mold caused by the solidification shrinkage stress of the wax. After the wax is removed, the shell is formed by coating, sanding, drying, dewaxing and baking. After the wax is removed, the flatness of the bottom of the ceramic shell is high.

[0072] During the casting process, if the bottom of the shell is not flat, the metal liquid will leak from the side of the bottom, the metal liquid will not fill the casting, and the leaked metal liquid will adhere to the copper crystallizer, damaging the crystallizer. However, due to the high flatness of the bottom of the shell prepared by using the wax mold assembling device described in Example 5, the metal liquid fills the shell to the bottom, which prevents the metal liquid from leaking to the side of the bottom, so that the casting is completely filled (as shown in Figure 5 It is proved by experiments that the wax mold base in the embodiment of the present application, which is inlaid with a support plate, can realize the "reducing the unevenness of the shell and inhibiting the leakage of metal liquid during the casting process".

[0073] In addition, the wax mold assembling device uses an electric control rotating device, thereby reducing the process of manually rotating the large mold wax mold base by personnel, avoiding the error of manual operation, increasing the operability of the large mold wax mold, and improving the preparation efficiency.

[0074] Comparative Example 1

[0075] Comparative Example 1 uses a conventional wax mold assembling device to carry out the shell preparation and single crystal casting process. Among them, the pressed wax mold base is completely filled with wax, without a support plate. During the solidification process of the wax, shrinkage stress will be generated. Due to the low strength of the wax, the shrinkage stress causes the wax to have a concave shape, making the entire wax mold base uneven. After dewaxing and shell preparation, the bottom of the shell is not flat, and during the casting process, the metal liquid leaks from the concave area, and the remaining metal liquid cannot completely fill the casting, resulting in incomplete filling of the casting, and the prepared single crystal casting is scrapped, as shown in Figure 6 At the same time, the conventional wax mold assembling device still relies on manual assembly. The wax parts are sequentially adhered to the base plate by manually rotating the wax mold base plate, which is difficult for manual operation. A single person cannot rotate the base plate, and multiple people are needed to cooperate with the adhesion, which is low in preparation efficiency.

[0076] In summary, the wax mold base mold, the wax mold base and the preparation method, and the wax mold group tree device prepared by the embodiment of the present application. The present application designs a support disc to reduce the unevenness caused by the solidification shrinkage of the large mold group wax mold base; by using multiple metal molds in combination, the size of the wax mold base is adjusted by using the size of the metal mold in the metal base, and the adjustability of the number of multi-layer group trees of the large mold casting is realized; the large mold wax mold group tree is carried out by using the electric control transmission device, the wax mold base is uniformly and slowly rotated by electric control, the single crystal blade group tree is placed on the wax mold base, the operability of the large mold wax mold is increased, and the preparation time of the large mold wax mold is reduced. The support disc is put into the base mold body in the embodiment of the present application, then the wax material is injected and filled, the flat large mold group wax mold base is obtained by using the rigidity of the support disc, the size of the large mold group wax mold base is adjusted by using the metal mold combination, the prepared wax mold base is placed on the electric control rotating device, the single crystal blade wax piece is group tree by the uniform and controllable rotating disc, and the prepared wax mold is used in the field of precision investment casting wax mold preparation in the aviation field, the problems of the uneven wax mold base, the uneven shell bottom, the metal liquid pouring leakage and the large mold group wax mold group tree operation difficulty in the preparation of the precision investment casting part are solved, and the yield of the precision investment casting prepared casting is improved. The scheme of the present application can improve the preparation efficiency, reduce the cost, and realize the cost reduction and benefit increase.

[0077] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A wax chassis mold, characterized in that: The wax model chassis mold comprises: A chassis mold body, the chassis mold body comprising a first chassis mold and a second chassis mold; wherein the second chassis mold is placed inside the first chassis mold so as to form an annular chassis structure between the first chassis mold and the second chassis mold; A support plate is detachably connected to the first chassis mold so that the support plate is placed in the annular chassis structure between the first chassis mold and the second chassis mold, and there is a gap between the plate body of the support plate and the plate body of the first chassis mold.

2. The wax chassis mold according to claim 1, characterized in that: The support plate is made of metal, preferably aluminum alloy or stainless steel.

3. The wax chassis mold according to claim 1 or 2, characterized in that: A first engaging structure is provided at the outer edge of the support plate; a second engaging structure is provided on the outer edge wall of the first chassis mold; wherein the first engaging structure and the second engaging structure are adapted to each other; Preferably, the first engaging structure is a convex supporting column; and the second engaging structure is a groove.

4. The wax model chassis mold according to any one of claims 1 to 3, characterized in that: The first chassis mold is provided with a wax injection port for injecting wax into the annular chassis structure and wrapping the support plate with the wax; Preferably, the angle between the wax injection port and the outer edge of the first chassis mold is 5°-30°.

5. A wax mold chassis, characterized in that: A support plate is embedded in the wax mold chassis; preferably, the support plate is a metal support plate.

6. The method for preparing the wax mold chassis according to claim 5, characterized in that: The wax mold chassis is prepared using the wax mold chassis mold described in any one of claims 1-4.

7. The method for preparing a wax mold chassis according to claim 6, characterized in that: The preparation method comprises the following steps: The wax material is injected into the annular chassis structure formed between the first chassis mold and the second chassis mold of the wax chassis mold through the wax injection port. After the wax material is filled, the wax material wraps around the support plate, and the chassis mold body is removed to obtain the wax chassis; Preferably, the injection filling temperature of the wax material is 55-75°C; Preferably, before injecting the filling wax into the wax chassis mold, the wax chassis mold needs to be preheated, wherein the preheating temperature is 20-100°C; Preferably, the injection filling time is 5-20 minutes, and the injection filling pressure is 15-30 kg / cm 2 , the holding time is 20-180s.

8. A wax model tree device, characterized in that: The wax model tree device comprises: Rotating device; A rotating disk, wherein the rotating device is connected to the rotating disk and is used to drive the rotating disk to rotate one or more wax mold chassis, wherein the wax mold chassis is the wax mold chassis according to claim 5; A control system is connected to the rotating device and is used to control the rotating device.

9. The wax model tree device according to claim 8, characterized in that: Each of the wax mold chassis and the rotating disk is connected via supporting bolts.

10. The wax model tree device according to claim 8, characterized in that: The rotating device comprises: a rotating motor connected to the control system; a transmission mechanism connected to the rotating disk and used to drive the rotating disk to rotate; Preferably, the transmission mechanism includes: the transmission mechanism includes a first transmission rod, a first transmission gear, a second transmission gear, and a second transmission rod; Wherein, the first transmission rod is in transmission connection with the first transmission gear; the first transmission gear is in transmission connection with the second transmission gear; the second transmission gear is in transmission connection with the second transmission rod; and the second transmission rod is in driving connection with the rotating disk; Preferably, the pitch circle diameter ratio of the first transmission gear and the second transmission gear is 1:2-1:10.

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