Preparation method of wax mold containing multi-angle tube cavity

Abstract

The invention provides a preparation method of a wax mold containing a multi-angle tube cavity. The preparation method of the wax mold containing the multi-angle tube cavity comprises the following steps: obtaining a mold core; the mold core comprises a plurality of pipe bodies which are distributed at multiple angles; the mold core and the block wax molds are combined and spliced, the mold core is arranged in a multi-angle pipe cavity defined by the block wax molds, and a wax mold containing the multi-angle pipe cavity is manufactured; wherein the inner diameter of the port of at least part of the pipe body of the mold core is the same as the inner diameter of the port of the multi-angle pipe cavity so as to be precisely matched, and the rest part of at least part of the pipe body is suspended in the multi-angle pipe cavity. By the adoption of the preparation method, it can be guaranteed that the block wax mold is accurately matched with the mold core, and the size precision of an inner cavity of a casting in the later period can be guaranteed through the size precision of the mold core.

Description

Technical Field

[0001] The invention relates to the technical field of wax model preparation, and in particular to a method for preparing a wax model containing a multi-angle lumen. Background Art

[0002] Titanium alloy precision castings are generally prepared by investment casting, which is also called lost wax casting. It usually refers to the use of fusible materials to make casting patterns, coating the surface of the patterns with several layers of refractory materials to make a shell, melting the patterns and discharging them into the shell, and obtaining the shell after high-temperature roasting. The casting is obtained by pouring molten metal into the shell, which generally includes the steps of wax pressing, shell preparation, dewaxing, pouring molten metal, and post-processing. For titanium alloy precision castings, due to the need for unified structure and function, the internal structure is complex and often includes a blind cavity structure. Ceramic cores are required to form complex inner cavities. After the casting is poured, the cores are removed to form the inner cavity structure of the casting. Therefore, in the wax pressing process of castings, it is necessary to place a core in the wax pressing mold and then inject wax to form a wax mold with a core. For castings with complex inner cavities, it is usually necessary to prepare block wax molds in different areas and then splice them into an integral wax mold.

[0003] Since the whole wax mold is made up of multiple parts, when the block wax mold and the multi-angle tubular core are matched, due to the problem of manufacturing dimensional accuracy of the block wax mold and the core, assembly dislocation is easy to occur during splicing. For example, some wax molds in the block wax mold can be assembled with the core, but after assembly, the remaining block wax molds cannot be completely matched with the core due to the dimensional accuracy of the wax mold and the dimensional accuracy of the core, resulting in the block wax mold being unable to be accurately assembled with the core. At the same time, for wax molds with cores inside, during the wax pressing process, they are easily impacted by the wax liquid, causing the core to shift and break, resulting in the inability to form the casting or directly affecting the dimensional accuracy of the complex structure of the inner cavity of the casting, which has a great impact on the service life and reliability of the casting. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, the main purpose of the present invention is to provide a method for preparing a wax mold containing a multi-angle lumen. The preparation method of the present invention can not only ensure the precise matching of the divided wax mold and the core, but also utilize the dimensional accuracy of the core to ensure the dimensional accuracy of the inner cavity of the later casting.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a method for preparing a wax mold containing a multi-angle tubular cavity, which comprises the following steps: obtaining a core; the core comprises a plurality of tubular bodies distributed at multiple angles; obtaining a bottom wax mold, a rear wax mold and a front wax mold; wherein the bottom wax mold is provided with a first pipeline groove, the rear wax mold is provided with a second pipeline groove, and the front wax mold is provided with a third pipeline groove; assembling the core with the bottom wax mold, the rear wax mold and the front wax mold, and placing the core in a multi-angle tubular cavity formed by the first pipeline groove, the second pipeline groove and the third pipeline groove to obtain the wax mold containing the multi-angle tubular cavity; wherein the inner diameter at the port of at least part of the tubular body of the core is the same as the inner diameter at the port of the multi-angle tubular cavity for precise matching, and at least part of the rest of the tubular body is suspended in the multi-angle tubular cavity.

[0006] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤10mm, the distance between the suspended portion of the tube body and the wall of the multi-angle lumen at the corresponding position is ≤1mm; when the wall thickness of the wax model corresponding to the suspended portion of the tube body is >10mm, the distance between the suspended portion of the tube body and the wall of the multi-angle lumen at the corresponding position is ≤2mm.

[0007] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤3 mm, the spacing between the suspended portion of the tube body and the cavity wall of the multi-angle lumen at the corresponding position is ≤0.5 mm.

[0008] In some embodiments of the present invention, the length of the tube body at the end of the tube body having the same inner diameter is ≥8 mm.

[0009] In some embodiments of the present invention, the core is prepared according to the casting tube cavity structure, and the plurality of tubes are divided into X tubes, Y tubes, and Z tubes according to the extension direction of the tubes.

[0010] In some embodiments of the present invention, the X tube body, the Y tube body, and the Z tube body represent the three-dimensional directions of the coordinate axes X-axis, Y-axis, and Z-axis where the tube body is located, and there is at least one X tube body, the Y tube body, and the Z tube body respectively.

[0011] In some embodiments of the present invention, the wax mold is designed according to the casting structure, and the bottom wax mold is separated at the corresponding position of the wax mold using the plane formed by the center lines of the X tube body and the Y tube body as the dividing plane; the remaining wax mold is separated at the corresponding position of the wax mold using the plane formed by the center lines of the X tube body and the part of the Z tube body connected to the X tube body as the dividing plane to obtain the rear wax mold and the front wax mold.

[0012] In some embodiments of the present invention, the core is assembled with the bottom wax mold, the rear wax mold and the front wax mold, including: placing the X tube body, the Y tube body and part of the Z tube body of the core in the first pipeline groove of the bottom wax mold to position them in the X, Y and Z directions; assembling the rear wax mold and the front wax mold to the bottom wax mold respectively, and the front wax mold and the rear wax mold are matched, so that part of the second pipeline groove and part of the third pipeline groove are combined to form a tube cavity that sleeves part of the Z tube body, and the first pipeline groove and part of the third pipeline groove are combined to form a tube cavity that sleeves the X tube body, the Y tube body and part of the Z tube body.

[0013] In some embodiments of the present invention, the Z tube body further includes a Z1 tube body connected to the Y tube body, and the rear wax mold is further provided with a sleeve cavity for sleeve-connecting the Z1 tube body.

[0014] In some embodiments of the present invention, a partial area of ​​the Z1 tube body has the same inner diameter as the sleeve lumen at a corresponding position for precise matching, and the remaining area of ​​the Z1 tube body is suspended in the sleeve lumen.

[0015] In some embodiments of the present invention, a first positioning protrusion and a second positioning protrusion are provided on the base wax mold, wherein the first positioning protrusion is used for positioning and assembling with the rear wax mold; and the second positioning protrusion is used for positioning and assembling with the front wax mold.

[0016] In some embodiments of the present invention, at least a portion of the tube body of the core passes through the multi-angle tube cavity and is exposed outside the wax mold.

[0017] In some embodiments of the present invention, the wax film preparation method further includes: melting at least a portion of the joints between the bottom wax mold, the rear wax mold, and the front wax mold to fuse them together.

[0018] Advantages of the present invention:

[0019] The present invention adopts a preparation method in which the end of the multi-angle tube cavity is precisely matched with the end of at least part of the tube body of the core, and the rest of at least part of the tube body is suspended in the multi-angle tube cavity. This can avoid the problem that the core cannot be assembled with the multi-angle tube cavity in a certain dimension due to having multiple tube bodies distributed at multiple angles.

[0020] Since the X tube body, Y tube body, Z tube body and other tube bodies of the core are in different planes, when the bottom wax mold, front wax mold, back wax mold and core are spliced, there will inevitably be assembly interference. For example, after the X tube body and Y tube body are assembled with the bottom wax mold, due to the shrinkage and deformation of the wax mold, the front wax mold and the back wax mold cannot be assembled with the X tube body and the Y tube body at the same time as the Z tube bodies in multiple directions (such as Z1 tube body, Z2 tube body, Z3 tube body, etc.). At this time, the spacing between the suspended part of the tube body and the cavity wall of the multi-angle tube cavity can be used as a space for adjusting interference.

[0021] The present invention utilizes the plane formed by the center lines of the X tube body, Y tube body and Z tube body of the core as the dividing plane of the wax mold, and divides the wax mold containing the multi-angle tube cavity into the front wax mold, the rear wax mold and the bottom wax mold. Therefore, the mutual splicing of the front wax mold, the rear wax mold and the bottom wax mold inevitably involves the positioning of the wax mold in the three-dimensional directions of X, Y and Z, which is conducive to ensuring that the wax mold containing the multi-angle core is accurately positioned in the three-dimensional directions during the splicing process.

[0022] The present invention provides a sleeve tube cavity structure, which is sleeved on the corresponding Z tube body. The front wax model and the rear wax model are fixed as a whole through the sleeve tube cavity, and the movement of the front wax model and the rear wax model in the Z direction is restricted, thereby ensuring the integrity of the front wax model and the rear wax model spliced ​​in sequence, and forming the positioning of the front wax model and the rear wax model in the Z direction.

[0023] In the present invention, the multi-angle distributed tube body of the core forms a multi-dimensional matching relationship with the block wax mold, which not only ensures the precise matching of the block wax mold and the core, but also can use the dimensional accuracy of the core to ensure the dimensional accuracy of the inner cavity of the later casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Various other advantages and benefits will become apparent to those skilled in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. In the accompanying drawings:

[0025] Figure 1 A schematic diagram of the wax model structure containing multi-angle lumens in the embodiment provided by the present invention;

[0026] Figure 2 A schematic diagram of the structure of the core in the embodiment provided by the present invention;

[0027] Figure 3 A schematic diagram of the structure of the bottom wax mold in the embodiment provided by the present invention;

[0028] Figure 4 A schematic diagram of the structure of the bottom wax mold and the core after being assembled in the embodiment provided by the present invention;

[0029] Figure 5A schematic structural diagram of the front wax mold in the embodiment provided by the present invention;

[0030] Figure 6 A schematic diagram of the structure of the core, the bottom wax mold and the front wax mold after being assembled in the embodiment provided by the present invention;

[0031] Figure 7 Schematic diagram of the rear wax mold structure in the embodiment provided by the present invention Figure 1 ;

[0032] Figure 8 Schematic diagram of the rear wax mold structure in the embodiment provided by the present invention Figure 2 .

[0033] In the figure:

[0034] 1. Core; 11. X tube body; 12. Y tube body; 13. Z1 tube body; 14. Z2 tube body; 15. Z3 tube body; 16. Z4 tube body;

[0035] 2. Base wax mold; 21. First pipeline groove; 22. First positioning protrusion; 23. Second positioning protrusion;

[0036] 3. rear wax model; 31. second pipeline groove; 32. sleeve tube cavity;

[0037] 4. front wax model; 41. third pipeline groove;

[0038] 5. Splice the top surface. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0040] Figure 1 The overall structural schematic diagram of the wax model containing multi-angle lumens prepared in the present invention is shown.

[0041] The wax mold containing multi-angle lumens in the present invention is manufactured by assembling a divided wax mold (including a front wax mold 4, a rear wax mold 3, and a bottom wax mold 2) and a core 1.

[0042] The bottom wax mold 2 is formed with a first pipeline groove 21, the rear wax mold 3 is formed with a second pipeline groove 31, and the front wax mold 4 is formed with a third pipeline groove 41. The core 1 is assembled with the bottom wax mold 2, the rear wax mold 3 and the front wax mold 4, and the core 1 is placed in a multi-angle tube cavity formed by the first pipeline groove 21, the second pipeline groove 31 and the third pipeline groove 41, and the inner diameter of the port of at least part of the tube body of the core 1 is the same as the inner diameter of the port of the multi-angle tube cavity for precise matching, and the rest of at least part of the tube body is suspended in the multi-angle tube cavity.

[0043] The method of precisely matching the port of the multi-angle tube cavity with the port of at least part of the tube body of the core 1, and suspending the rest of at least part of the tube body in the multi-angle tube cavity, can avoid the problem that the core 1 cannot be assembled with the multi-angle tube cavity in a certain dimension due to the multiple tube bodies distributed at multiple angles. In the present invention, since the multi-angle distributed tube body of the core 1 forms a multi-dimensional matching relationship with the block wax mold, it can ensure that the block wax mold and the core 1 are accurately matched, and the dimensional accuracy of the inner cavity of the later casting can be ensured by using the dimensional accuracy of the core 1.

[0044] In an embodiment of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤10mm, the spacing between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position is ≤1mm. It can also be understood that the spacing between the suspended portion of the tube body and the groove walls of the first pipe groove 21, the second pipe groove 31, and the third pipe groove 41 at the corresponding position is ≤1mm.

[0045] In an embodiment of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is greater than 10 mm, the spacing between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position is ≤2 mm. It can also be understood that the spacing between the suspended portion of the tube body and the groove walls of the first pipe groove 21, the second pipe groove 31, and the third pipe groove 41 at the corresponding position is ≤2 mm.

[0046] In certain embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤3 mm, the spacing between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position is ≤0.5 mm. It can also be understood that the spacing between the suspended portion of the tube body and the groove walls of the first pipe groove 21, the second pipe groove 31, and the third pipe groove 41 at the corresponding position is ≤0.5 mm.

[0047] In the embodiment of the present invention, the spacing design between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position can meet the assembly requirements of the core 1 and the shrinkage and deformation requirements of the wax mold.

[0048] It is worth mentioning that in the present invention, the distance between the suspended part of the tube body and the cavity wall of the multi-angle lumen can also be designed according to the proportional relationship between the distance existing between the suspended part of the tube body and the cavity wall of the multi-angle lumen and the wall thickness of the wax mold corresponding to the suspended part of the tube body.

[0049] Among them, the proportional relationship formula is: d = kx;

[0050] In the formula, k is the proportionality coefficient, d is the distance between the suspended part of the tube body and the cavity wall of the multi-angle lumen at the corresponding position, and x is the wall thickness of the wax mold.

[0051] In some embodiments of the present invention, when 1 mm ≤ x ≤ 8 mm, 0.4 ≤ k ≤ 0.5.

[0052] In some embodiments of the present invention, when 8 mm < x ≤ 20 mm, 0.1 ≤ k ≤ 0.15.

[0053] In some embodiments of the present invention, the length of the tube body with the same inner diameter at the port of the tube body is ≥ 8 mm to ensure high-precision and precise fit.

[0054] The method for preparing the wax mold containing the multi-angle lumen in the present invention is carried out according to the following steps.

[0055] (1) Obtain the core 1.

[0056] In the embodiment of the present invention, the core 1 is prepared according to the cavity structure of the casting.

[0057] In the embodiment of the present invention, the core 1 includes a plurality of tube bodies distributed at multiple angles, and the plurality of tube bodies are distributed in different orientations in the three dimensions of X, Y, and Z. It can be understood that the core 1 has a multi-angle pipe-like structure.

[0058] Figure 2 Figure shows a specific structural schematic diagram of a core 1.

[0059] According to the tube body extension direction, the multiple tube bodies forming the core 1 are divided into X tube body 11, Y tube body 12, and Z tube body, where: the Z tube body includes Z1 tube body 13, Z2 tube body 14, Z3 tube body 15, and Z4 tube body 16.

[0060] In the embodiment of the present invention, the Z1 tube body 13 is connected to the Y tube body 12, the Z2 tube body 14 is connected to the X tube body 11, and the Z1 tube body 13 and the Z2 tube body 14 are not arranged in the same direction.

[0061] In the embodiment of the present invention, the Z3 tube body 15 is connected to the connection part of the X tube body 11 and the Y tube body 12, and the Z4 tube body 16 is connected to the connection part of the X tube body 11 and the Y tube body 12.

[0062] In some embodiments of the present invention, the X tube body 11 includes an X1 tube body and an X2 tube body; the Y tube body 12 includes a Y1 tube body and a Y2 tube body.

[0063] (2) A wax mold is designed according to the structure of the casting, and the overall wax mold is separated into a bottom wax mold 2, a rear wax mold 3 and a front wax mold 4. The core 1 is then assembled with the bottom wax mold 2, the rear wax mold 3 and the front wax mold 4 to obtain a wax mold with a multi-angle lumen inside.

[0064] As an embodiment of the present invention, a plane formed by the center lines of the X tube body 11 and the Y tube body 12 is used as a dividing plane to separate the bottom wax mold 2 at the corresponding position of the wax mold; a plane formed by the center lines of the X tube body 11 and the part of the Z tube body connected to the X tube body 11 is used as a dividing plane to separate the remaining wax mold at the corresponding position of the wax mold to obtain a rear wax mold 3 and a front wax mold 4.

[0065] Therefore, the mutual splicing of the front wax mold 4, the rear wax mold 3 and the bottom wax mold 2 inevitably involves the positioning of the wax mold in the three-dimensional directions of X, Y and Z, which is conducive to ensuring that the wax mold containing the multi-angle core is accurately positioned in the three-dimensional directions during the splicing process.

[0066] (2-1) Assemble the core 1 onto the bottom wax mold 2 to obtain a combined structure of the core 1 and the bottom wax mold 2.

[0067] Figure 3 A schematic structural diagram of a bottom wax mold 2 is shown. Figure 4 The schematic diagram of the combined structure of assembling the core 1 onto the bottom wax mold 2 is shown.

[0068] In an embodiment of the present invention, the core 1 is placed corresponding to the first pipeline groove 21 of the bottom wax mold 2, part of the tube body is placed in the first pipeline groove 21, and positioning in the three directions of X, Y, and Z is achieved to prevent the core 1 from sliding in the first pipeline groove 21.

[0069] In some embodiments of the present invention, the X tube body 11, the Y tube body 12 and part of the Z tube body of the core 1 are placed in the first channel groove 21 of the bottom wax mold 2 to be positioned in the X, Y and Z directions.

[0070] As some embodiments of the present invention, the X tube body 11, the Y tube body 12 and the Z2 tube body 14 of the core 1 are placed in the first pipeline groove 21 of the bottom wax mold 2, and the X tube body 11 and the Y tube body 12 are respectively matched with the partial area of ​​the first pipeline groove 21 (which can be called the first core groove) to be positioned in the X and Y directions; the Z2 tube body 14 is matched with the partial area of ​​the first pipeline groove 21 (which can be called the first positioning groove) to be positioned in the Z direction. At this time, the core 1 is positioned in the three directions of X, Y and Z by the X tube body 11, the Y tube body 12 and the Z2 tube body 14 to prevent the core 1 from sliding in the first pipeline groove 21.

[0071] It is worth mentioning that the inner diameter of the Z2 tube body 14 is identical to the inner diameter of the first pipe groove 21 at the corresponding position for precise matching, thereby ensuring accurate positioning in the Z direction.

[0072] The inner diameters of the ports of the X tube body 11 and the Y tube body 12 of the core 1 are the same as the inner diameters of the ports of the first pipe groove 21 at the corresponding positions, which are precisely matched.

[0073] The inner diameter of the rest of the X tube body 11 and the Y tube body 12 of the core 1 is smaller than the inner diameter of the first conduit groove 21 at the corresponding position. When the core 1 is assembled to the first conduit groove 21, the X tube body 11 and the Y tube body 12 are fixed only at the end of the first conduit groove 21, and the rest of the X tube body 11 and the Y tube body 12 are suspended in the first conduit groove 21.

[0074] In certain embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11 and the Y tube body 12 is ≤10 mm, the spacing between the suspended portion of the X tube body 11 and the Y tube body 12 and the cavity wall of the multi-angle lumen at the corresponding position is ≤1 mm, which can also be understood as the spacing between the suspended portion of the X tube body 11 and the Y tube body 12 and the groove wall of the first pipeline groove 21 at the corresponding position is ≤1 mm.

[0075] In certain embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X-tube body 11 and the Y-tube body 12 is greater than 10 mm, the spacing between the suspended portion of the X-tube body 11 and the Y-tube body 12 and the cavity wall of the multi-angle lumen at the corresponding position is ≤2 mm, which can also be understood as the spacing between the suspended portion of the X-tube body 11 and the Y-tube body 12 and the groove wall of the first pipeline groove 21 at the corresponding position is ≤2 mm.

[0076] In certain embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X-tube body 11 and the Y-tube body 12 is ≤3 mm, the spacing between the suspended portion of the X-tube body 11 and the Y-tube body 12 and the cavity wall of the multi-angle lumen at the corresponding position is ≤0.5 mm, which can also be understood as the spacing between the suspended portion of the X-tube body 11 and the Y-tube body 12 and the groove wall of the first pipeline groove 21 at the corresponding position is ≤0.5 mm.

[0077] (2-2) Assemble the front wax mold 4 onto the bottom wax mold 2 to obtain a combined structure of the core 1, the bottom wax mold 2 and the front wax mold 4.

[0078] Figure 5 A schematic diagram of the structure of a front wax mold 4 is shown. The structure after the core 1, the bottom wax mold 2 and the front wax mold 4 are assembled is as shown in FIG. Figure 6 shown.

[0079] In an embodiment of the present invention, the third pipe groove 41 of the front wax mold 4 is arranged corresponding to a portion of the pipe body, and the front wax mold 4 is assembled on the bottom wax mold 2 .

[0080] In some embodiments of the present invention, a partial area of ​​the third pipe groove 41 corresponds to a partial area of ​​the first pipe groove 21 and is enclosed for sleeve connection with the X tube body 11 and the Y tube body 12 .

[0081] In some embodiments of the present invention, a partial area of ​​the third pipe groove 41 is arranged corresponding to the Z3 pipe body 15 and the Z4 pipe body 16 .

[0082] The front wax mold 4 is assembled on the bottom wax mold 2 after cooperating with the X tube body 11, Y tube body 12, and Z2 tube body 14 of the core 1. Therefore, the front wax mold 4 and the bottom wax mold 2 are positioned in the X and Y directions, and the front wax mold 4 cannot move in the X and Y directions, thereby ensuring accurate assembly in the X and Y directions.

[0083] It is worth mentioning that the inner diameter of the port of the third pipe groove 41 of the front wax mold 4 is the same as the inner diameter of the port of the corresponding matching pipe body, which is a precise match.

[0084] The inner diameter of the rest of the third conduit groove 41 is larger than the inner diameter of the corresponding tube body. After the front wax model 4 is assembled on the bottom wax model 2, the X tube body 11, the Y tube body 12 and part of the Z tube body, such as the Z3 tube body 15 and the Z4 tube body 16, are fixed only through the end of the third conduit groove 41, and the rest of the X tube body 11, the Y tube body 12 and part of the Z tube body are suspended in the third conduit groove 41.

[0085] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is ≤10 mm, the spacing between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the third pipeline groove 41 at the corresponding position is ≤1 mm.

[0086] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is greater than 10 mm, the spacing between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the third pipeline groove 41 at the corresponding position is ≤2 mm.

[0087] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is ≤3 mm, the spacing between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the third pipeline groove 41 at the corresponding position is ≤0.5 mm.

[0088] In an embodiment of the present invention, a second positioning protrusion 23 is further provided on the bottom wax mold 2 , and the second positioning protrusion 23 is used for positioning and assembling with the front wax mold 4 , so that the front wax mold 4 and the bottom wax mold 2 form a positioning assembly.

[0089] (2-3) Assemble the rear wax mold 3 onto the bottom wax mold 2 to obtain a combined structure of the core 1, the bottom wax mold 2, the front wax mold 4 and the rear wax mold 3.

[0090] Figure 7 A schematic diagram of the structure of a rear wax mold 3 is shown. Figure 1 , Figure 8 A schematic diagram of the structure of a rear wax mold 3 is shown. Figure 2 The overall structure after assembling the core 1, the bottom wax mold 2, the front wax mold 4 and the rear wax mold 3 is as follows Figure 1 shown.

[0091] In an embodiment of the present invention, the second conduit groove 31 of the rear wax mold 3 is placed corresponding to the partial tube body of the core 1, and the rear wax mold 3 is assembled on the bottom wax mold 2, and the front wax mold 4 is arranged in a matched manner with the rear wax mold 3, so that the partial second conduit groove 31 of the rear wax mold 3 and the partial third conduit groove 41 of the front wax mold 4 are combined to form a tube cavity for sleeve-connecting the partial Z tube body, such as the Z3 tube body 15 and the Z4 tube body 16, and at the same time, the first conduit groove 21 of the bottom wax mold 2 and the partial third conduit groove 41 and the partial second conduit groove 31 are combined to form a tube cavity for sleeve-connecting the X tube body 11, the Y tube body 12 and the partial Z tube body, such as the Z2 tube body 14.

[0092] The rear wax mold 3 is assembled on the bottom wax mold 2 and the front wax mold 4 after cooperating with the X tube body 11, Y tube body 12, and Z4 tube body 16 of the core 1. Therefore, the rear wax mold is positioned with the front wax mold 4 and the bottom wax mold 2 in the X and Y directions, and the rear wax mold 3 cannot move in the X and Y directions, thereby ensuring accurate assembly in the X and Y directions.

[0093] It is worth mentioning that the inner diameter of the port of the second pipe groove 31 of the rear wax mold 3 is the same as the inner diameter of the port of the corresponding matching pipe body, which is a precise match.

[0094] The inner diameter of the rest of the second pipe groove 31 is larger than the inner diameter of the corresponding tube body. When the rear wax model 3 is assembled on the bottom wax model 2, the X tube body 11, the Y tube body 12 and part of the Z tube body, such as the Z3 tube body 15 and the Z4 tube body 16, are fixed only through the port of the second pipe groove 31, and the rest of the X tube body 11, the Y tube body 12 and part of the Z tube body are suspended in the second pipe groove 31.

[0095] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is ≤10 mm, the spacing between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the second pipeline groove 31 at the corresponding position is ≤1 mm.

[0096] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is greater than 10 mm, the distance between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the second pipeline groove 31 at the corresponding position is ≤2 mm.

[0097] In some embodiments of the present invention, when the wall thickness of the wax model corresponding to the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 is ≤3 mm, the spacing between the suspended portion of the X tube body 11, the Y tube body 12, the Z3 tube body 15, and the Z4 tube body 16 and the groove wall of the second pipeline groove 31 at the corresponding position is ≤0.5 mm.

[0098] In some embodiments of the present invention, the inner diameter of the Z2 tube body 14 is the same as the inner diameter of the second pipe groove 31 at the corresponding position for precise matching.

[0099] Of course, it can be understood that the inner diameter of the Z2 tube body 14 is the same as the inner diameter of the multi-angle tube cavity at the corresponding position for precise matching.

[0100] In the embodiment of the present invention, at least one sleeve cavity 32 is further provided on the rear wax mold 3, and the sleeve cavity 32 is sleeved on the corresponding Z tube body. Through the sleeve cavity 32, the front wax mold 4 and the rear wax mold 3 are fixed as a whole, the front wax mold 4 and the rear wax mold 3 are restricted from moving in the Z direction, and the front wax mold 4 and the rear wax mold 3 are positioned in the Z direction.

[0101] As an embodiment of the present invention, the rear wax mold 3 is provided with a sleeve cavity 32 for sleeve-connecting the Z1 tube body 13 .

[0102] It is worth mentioning that a part of the Z1 tube body 13 has the same inner diameter as the sleeve lumen 32 at the corresponding position for precise matching, and the rest of the Z1 tube body 13 is suspended in the sleeve lumen 32 .

[0103] In the embodiment of the present invention, at least part of the tube body of the core 1 passes through the multi-angle tube cavity and is exposed outside the wax mold, that is, part of the tube body of the core 1 is exposed outside the wax mold.

[0104] (2-4) Melt at least part of the joints between the bottom wax mold 2, the rear wax mold 3, and the front wax mold 4, and fuse them together.

[0105] In an embodiment of the present invention, after the overall assembly is completed, a cover is set outside the position where the core 1 and the block wax mold are spliced ​​and the wax mold is exposed. The material of the cover is an elastic material that can tightly fix at least two block wax molds and the core 1.

[0106] Then, at the joint top surface 5, the wax model in the local area of ​​the joint seam is melted, the joint seam is fused together, and the divided wax models are joined into a whole.

[0107] Finally remove the cover.

[0108] In an embodiment of the present invention, the tool for melting the joint seam can be an electric soldering iron.

[0109] It should be noted that the terms "comprises" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, the inclusion of a series of components is not necessarily limited to those components explicitly listed, but may include other components that are not explicitly listed or inherent to the components.

[0110] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "bottom", "top", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0111] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0112] In addition, the descriptions of "first", "second", etc. involved in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0113] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0114] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for preparing a wax model containing a multi-angle lumen, characterized in that: The following steps are involved: Obtaining a core; the core comprising a plurality of tubes distributed at multiple angles; A bottom wax mold, a rear wax mold and a front wax mold are obtained; wherein the bottom wax mold is provided with a first pipeline groove, the rear wax mold is provided with a second pipeline groove, and the front wax mold is provided with a third pipeline groove; Assembling the core with the bottom wax mold, the rear wax mold and the front wax mold, and placing the core in a multi-angle lumen formed by the first pipeline groove, the second pipeline groove and the third pipeline groove, to obtain the wax mold containing the multi-angle lumen; The inner diameter of at least part of the tube body of the core at the port is the same as the inner diameter of the multi-angle tube cavity at the port for precise matching, and at least part of the rest of the tube body is suspended in the multi-angle tube cavity.

2. The method for preparing a wax model containing a multi-angle lumen according to claim 1, characterized in that: When the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤10 mm, the distance between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position is ≤1 mm; When the wall thickness of the wax model corresponding to the suspended portion of the tube body is greater than 10 mm, the distance between the suspended portion of the tube body and the cavity wall of the multi-angle tube cavity at the corresponding position is ≤ 2 mm; Preferably, when the wall thickness of the wax model corresponding to the suspended portion of the tube body is ≤3 mm, the distance between the suspended portion of the tube body and the cavity wall of the multi-angle lumen at the corresponding position is ≤0.5 mm.

3. The method for preparing a wax model containing a multi-angle lumen according to claim 1, characterized in that: The length of the tube body at the end of the tube body with the same inner diameter is ≥8mm.

4. The method for preparing a wax model containing a multi-angle lumen according to claim 1, characterized in that: The core is prepared according to the casting tube cavity structure, and the plurality of tubes are divided into X tubes, Y tubes, and Z tubes according to the extension direction of the tubes; Preferably, the X tube body, the Y tube body, and the Z tube body represent the three-dimensional directions of the coordinate axes X-axis, Y-axis, and Z-axis where the tube body is located, and there is at least one X tube body, the Y tube body, and the Z tube body respectively.

5. The method for preparing a wax pattern containing a multi-angle lumen according to claim 4, characterized in that: Designing a wax mold according to the structure of the casting, and using the plane formed by the center lines of the X tube body and the Y tube body as a dividing plane to separate the wax mold at the corresponding position to obtain the bottom wax mold; The remaining wax mold is separated at the corresponding position of the wax mold to obtain the rear wax mold and the front wax mold by using the plane formed by the center lines of the X tube body and the part of the Z tube body connected to the X tube body as the dividing plane.

6. The method for preparing a wax pattern containing a multi-angle lumen according to claim 4, characterized in that: The core is assembled with the bottom wax mold, the rear wax mold and the front wax mold, and comprises: Placing the X tube body, the Y tube body and part of the Z tube body of the core in the first channel groove of the bottom wax mold to position them in the X, Y and Z directions; The rear wax mold and the front wax mold are respectively assembled onto the bottom wax mold, and the front wax mold is matched with the rear wax mold so that part of the second pipe groove and part of the third pipe groove are combined to form a tube cavity for sleeve-connecting part of the Z tube body, and the first pipe groove, part of the third pipe groove and part of the second pipe groove are combined to form a tube cavity for sleeve-connecting the X tube body, the Y tube body and part of the Z tube body.

7. The method for preparing a wax pattern containing a multi-angle lumen according to claim 6, characterized in that: The Z tube body also includes a Z1 tube body connected to the Y tube body, and the rear wax mold is also provided with a sleeve cavity for sleeve-connecting the Z1 tube body; Preferably, a partial area of ​​the Z1 tube body has the same inner diameter as the sleeve lumen at the corresponding position for precise matching, and the remaining partial area of ​​the Z1 tube body is suspended in the sleeve lumen.

8. The method for preparing a wax pattern containing a multi-angle lumen according to claim 1, characterized in that: The bottom wax mold is provided with a first positioning protrusion and a second positioning protrusion, wherein the first positioning protrusion is used for positioning and assembling with the rear wax mold; and the second positioning protrusion is used for positioning and assembling with the front wax mold.

9. The method for preparing a wax pattern containing a multi-angle lumen according to claim 1, characterized in that: At least a portion of the tube body of the core passes through the multi-angle tube cavity and is exposed outside the wax mold.

10. The method for preparing a wax model containing a multi-angle lumen according to claim 1, characterized in that: Also includes: At least part of the joints between the bottom wax model, the rear wax model and the front wax model are melted and fused together.

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