High-precision wax mold forming mold for complex structure castings

Abstract

The application relates to the technical field of casting molds, in particular to a high-precision wax mold forming mold for a complex-structure casting, which comprises a first outer mold, a second outer mold, a bottom mold and a top mold; a first inner mold block and a second inner mold block are arranged in the first mold cavity; a parting surface of the second outer mold and the first outer mold is arranged along the side of the outer arc surface of a gas bag lower support; the bottom mold is clamped with the first outer mold and the second outer mold, the bottom mold is provided with a first through hole, a first inserting rod is inserted into the first through hole, the first inserting rod passes through the bottom mold and is inserted into first blind holes at the bottom of the first inner mold block and the second inner mold block, and the top mold is matched with the end of the first inner mold block, the second inner mold block and the second outer mold. Through reasonable design of the wax mold structure, the application realizes one-time integral forming of a gas bag lower support with a complex structure, meanwhile, the smooth demolding of the wax mold is guaranteed, and the efficiency and quality of the wax mold forming are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting mold, in particular to a high-precision wax mold forming mold for complex structure castings. BACKGROUND

[0002] Investment casting (also known as lost wax casting) is a casting method for obtaining accurate castings by using a precise molding method. It is widely used in batch production of castings due to its strong near-net-shape forming ability, high dimensional accuracy and good surface quality. The core process of this casting process includes wax mold making, shell coating, dewaxing, baking, pouring and other steps. The quality of the wax mold directly determines the dimensional accuracy and surface integrity of the final casting, and the forming quality of the wax mold is highly dependent on the design and performance of the forming mold.

[0003] The air bag lower bracket is a key load-bearing component of the air suspension of the automobile, which is mainly used to support the shock absorber air bag and transmit load, as shown in the air bag lower bracket for air suspension of a passenger car disclosed in CN203126440U. Due to the need to simultaneously realize precise connection with multiple components such as the vehicle body frame and the air bag generator, its structure presents significant complexity: it contains an arc-shaped connecting arm, the lower part of the connecting arm is integrated with multiple reinforcing ribs and connecting holes, the bottom of the connecting arm is provided with a base, and the base is provided with connecting holes and weight reduction grooves and other structures. The dimensional accuracy and structural integrity of this kind of complex structure casting have high requirements, and its manufacturing process is an important link to ensure the safety performance of the automobile.

[0004] At present, for air bag lower brackets and other complex structure castings, the traditional wax mold making usually adopts a split forming process: the complex wax mold is divided into several simple sub-modules, which are made separately and then assembled into a whole through bonding, welding or other methods. This method has obvious defects. Firstly, size deviation, joint marks or weak areas may occur at the split joints, leading to defects during subsequent shell preparation and casting pouring; secondly, it increases the complexity of the wax mold making process and labor cost, reduces production efficiency, and is difficult to meet the consistency requirements of high-precision castings.

[0005] Therefore, for air bag lower brackets and other complex structure automobile castings, it is of great significance to develop a special mold that can realize one-time integral forming of the wax mold and smooth demolding, in order to improve the stability of the investment casting process, reduce production cost and ensure the manufacturing accuracy of automobile safety components. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art and provide a high-precision wax mold forming mold for complex structure castings, which can realize one-time integral forming of the air bag lower bracket wax mold, facilitate the demolding of the wax mold, reduce production cost and improve the quality of the air bag lower bracket casting.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a high-precision wax mold forming mold for a complex structure casting, comprising a first outer mold, a second outer mold, a bottom mold and a top mold;

[0008] The first outer mold is provided with a first cavity for forming the inner structure of the lower support of the air bag, and the first cavity is internally provided with a first inner mold block and a second inner mold block for forming the double-arc surface inter-slot structure of the connecting arm.

[0009] The second outer mold is provided with a second cavity for forming the outer structure of the lower support of the air bag, and the second outer mold is combined with the first outer mold to form a parting surface, which is arranged along the side of the outer arc surface of the lower support of the air bag.

[0010] The bottom mold is used for forming the bottom structure of the base of the lower support of the air bag, and is fixed to the bottom of the first outer mold and the second outer mold through the clamping slots of the first outer mold and the second outer mold. The bottom mold is provided with a first through hole corresponding to the base connecting hole, and a first insertion rod is inserted into the first through hole. The first insertion rod passes through the bottom mold and is inserted into the first blind hole at the bottom of the first inner mold block and the second inner mold block.

[0011] The top mold is used for forming the end structure of the connecting arm of the lower support of the air bag, and is combined with the first outer mold and the second outer mold. After the combination, the top mold cooperates with the end of the first inner mold block, the second inner mold block and the second outer mold.

[0012] Further, the second outer mold includes a lower outer mold for forming the lower part of the connecting arm and an upper outer mold for forming the upper part of the connecting arm, which is beneficial to realize the multi-directional demolding of the outer structure of the lower support of the air bag.

[0013] Further, the first outer mold, the second outer mold and the first inner mold block are provided with a plurality of second through holes, and a second insertion rod is inserted into the second through hole. The second insertion rod realizes the pre-forming of the connecting hole of the connecting section of the lower support of the air bag, and at the same time realizes the fixation of the first inner mold block in the cavity.

[0014] Further, the top mold is internally provided with a top mold inner mold block, which includes a column for forming the through hole of the connecting ear of the lower support of the air bag and a top mold inner mold block body for forming the bottom structure of the connecting ear. By inserting or embedding the top mold inner mold block structure into the top mold, the pre-forming of the inclined hole of the connecting ear is realized. The top mold and the second outer mold (i.e. the upper outer mold) are respectively provided with semicircular grooves. After the combination of the top mold and the second outer mold, the two semicircular grooves form a circular groove for fixing the end of the column. The top mold inner mold block body is clamped with the top mold to realize the fixation of the top mold inner mold block.

[0015] Further, after the first inner module and the second inner module are clamped into the first cavity, the end of the first inner module and the second inner module protrudes from the first outer mold, the top mold is closed with the first outer mold, the second outer mold and the protruding part of the first inner module and the second inner module, the first inner module and the second inner module are positioned and fixed through the first insertion hole, the precise positioning and fixing of the top mold are realized through the protruding part of the first inner module and the second inner module, and the mold closing precision of each module is facilitated to be ensured.

[0016] Further, the first inner module and the second inner module comprise a forming part and a connecting part, the connecting part is in contact with the first outer mold, the second outer mold and the top mold, and the forming part forms a wax model cavity with the first outer mold, the second outer mold and the top mold, so that the fixing of the first inner module and the second inner module is facilitated to be strengthened, the fixing of the upper outer mold and the top mold is facilitated to be realized, and the mold closing precision of the mold is ensured.

[0017] Further, the connecting part of the first inner module and the second inner module is provided with a protrusion or a groove, and the top mold is correspondingly provided with a groove or a protrusion, so that the cooperation precision of the top mold and the first inner module and the second inner module is improved, and the mold closing precision of the first outer mold, the second outer mold, the top mold and the second outer mold, especially the upper outer mold, is ensured through cooperation with the first inner module and the second inner module.

[0018] Further, the end of the second outer mold (i.e. the upper outer mold) is provided with a positioning hole or a positioning column, and the top mold is provided with a positioning column or a positioning hole, the positioning column is inserted into the positioning hole, and after the mold is closed, the connection and fixing of the top mold and the first outer mold and the second outer mold are facilitated to be strengthened.

[0019] Further, the first outer mold is internally provided with a third inner module and a fourth inner module, which are used for forming a shock absorber connecting part of the air bag lower support and a connecting hole at the part.

[0020] Further, after the first outer mold and the lower outer mold are closed, a gap is arranged between the top of the lower outer mold and the first outer mold, after the mold is closed, the lower part of the upper mold is located in the gap and in contact with the lower outer mold, and the support and fixing of the upper outer mold are facilitated to be strengthened.

[0021] The beneficial effects of the present application are:

[0022] 1. Through the parting surface and the cooperative positioning design of multiple modules, the parting surface of the first cavity and the second cavity is arranged along the side of the outer arc surface of the air bag lower support, and the insertion structure of the first insertion rod penetrating through the bottom mold through hole and the blind hole of the first inner module and the second inner module is combined, so that the precise forming of the double-arc connecting arm is realized, the first inner module and the second inner module are fixed and positioned through the first insertion rod, and the cooperative fixing problem of the complex cavity module is solved.

[0023] 2、The recess between the two arc surfaces of the arc-shaped connecting arm is formed by the first inner module and the second inner module, and the first inner module and the second inner module are fixed by the first inserting rod and the second inserting rod. In this way, not only the connecting hole of the casting is formed in advance, but also the stable connection of the first inner module and the second inner module is ensured. In addition, through the multi-dimensional inserting structure of the first inner module and the first inserting rod and the second inserting rod, combined with the mutual cooperation of the top die and the first inner module and the second inner module, not only the stability of the second inner module is enhanced, and the positioning accuracy is ensured, but also the fixing and positioning of the top die and the upper outer module are realized, so as to ensure the accurate positioning of each module in the mold, and improve the quality of the wax mold forming;

[0024] 3、The second outer module adopts the combined design of the lower outer module (forming the lower part of the connecting arm) and the upper outer module (forming the upper part of the arc-shaped connecting arm), which can be separated from the upper outer module first and then separated from the lower outer module during demolding, avoiding the pulling damage of the traditional integral outer module to the connection part of the arc-shaped contour and the connecting section, and realizing the non-destructive demolding of the complex curved surface wax mold;

[0025] 4、The present application realizes the one-time integral forming of the complex structure of the air bag lower support through the reasonable design of the wax mold structure, and also ensures the smooth demolding of the wax mold, improves the efficiency and quality of the wax mold forming, and solves the technical problem of complex casting wax mold forming. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic diagram of the present application.

[0027] Figure 2 is a structure schematic diagram of the present application.

[0028] Figure 3 is a local structure schematic diagram of the present application.

[0029] Figure 4 is Figure 3 the front view.

[0030] Figure 5 is the plan view after the upper mold outer mold is taken out.

[0031] Figure 6 is a structure schematic diagram of the inner module of the present application.

[0032] BRIEF DESCRIPTION OF DRAWINGS:

[0033] 1 - first outer mold, 11 - first inner module, 12 - second inner module, 13 - first blind hole, 14 - third inner module, 15 - fourth inner module, 2 - second outer mold, 21 - lower outer mold, 22 - upper outer mold, 3 - bottom mold, 31 - first through hole, 4 - top mold, 41 - top mold inner module, 411 - cylinder, 412 - top mold inner module body, 5 - airbag lower bracket, 51 - connecting arm, 52 - base, 53 - connecting lug, 6 - first insertion rod, 7 - second through hole, 8 - second insertion rod. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the drawings and specific embodiments, but the scope of the application is not limited to this.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] As Figures 1 to 6As shown, the wax mold forming mold of the air bag lower support of the embodiment comprises a first outer mold 1, a second outer mold 2, a bottom mold 3 and a top mold 4; the first outer mold 1 or / and the second outer mold 2 is provided with a wax injection port; the first outer mold 1 is provided with a first cavity for forming the inner side structure of the air bag lower support 5, and the second outer mold 2 is provided with a second cavity for forming the outer side structure of the air bag lower support 5, the inner side of the air bag lower support 5 refers to one side of the arc inner side of the connecting arm 51 of the air bag lower support 5, and the outer side refers to one side of the arc outer side of the connecting arm 51; the connecting arm 51 of the air bag lower support 5 is a double-arc surface structure, comprising an inner arc surface on the inner side and an outer arc surface on the outer side, and the parting surface of the first outer mold 1 and the second outer mold 2 is arranged along the side of the outer arc surface of the connecting arm 51 of the air bag lower support 5; the first cavity is internally provided with a first inner mold block 11 and a second inner mold block 12, the first inner mold block 11 and the second inner mold block 12 are used for forming the groove structure between the double-arc surfaces of the connecting arm 51 of the air bag lower support 5, and the first blind hole 13 is coaxially arranged with the first through hole 31. The bottom mold 3 is used for forming the bottom structure of the base 52 of the air bag lower support 5, the bottom of the first outer mold 1 and the second outer mold 2 is provided with a clamping groove for fixing the bottom mold 3, the bottom mold 3 is provided with a plurality of first through holes 31, the first through holes 31 are correspondingly arranged with the connecting holes of the base 52 of the air bag lower support 5, and the first through holes 31 are inserted with the first inserting rod 6; the first inserting rod 6 is inserted with the first blind hole 13 through the first through hole 31, and the first inserting rod 6 can be used to form the connecting hole of the base 52 of the air bag lower support 5, and the connecting hole is convenient for subsequent processing of the connecting hole of the base 52; in addition, after the first inserting rod 6 is inserted with the first blind hole 13, the positioning and fixing of the first inner mold block 11 and the second inner mold block 12 in the first cavity can be realized. The top mold 4 is used for forming the end structure of the connecting arm 51 of the air bag lower support 5, such as the connecting ear 53 structure and part of the inner side structure of the connecting arm 51, after the first outer mold 1 and the second outer mold 2 are closed, the end of the first inner mold block 11 and the second inner mold block 12 protrudes from the end of the first outer mold 1 and the second outer mold 2, the top mold 4 cooperates with the protruding part of the first inner mold block 11 and the second inner mold block 12, the positioning and fixing of the top mold 4 are realized through the protruding part of the first inner mold block 11 and the second inner mold block 12, and the tightness of the connection between the top mold 4 and the first outer mold 1 and the second outer mold 2 is strengthened.

[0038] The second outer mold 2 comprises a lower outer mold 21 for forming the lower part of the connecting arm 51 of the lower bracket 5 of the air bag and an upper outer mold 22 for forming the upper part of the connecting arm 51, the lower outer mold 21 is provided with a lower cavity, and the upper outer mold 22 is provided with an upper cavity, and the upper cavity and the lower cavity jointly form a second cavity of the second outer mold 2; the second outer mold 2 on the curved outer side of the connecting arm 51 of the lower bracket 5 of the air bag is divided into two sections, which is beneficial to realize the multi-directional stripping of the outer side structure of the lower bracket 5 of the air bag, for example, when stripping, the upper outer mold 22 of the bending area of the curved connecting arm 51 can be first separated, and then the lower outer mold 21 of the lower part of the connecting arm can be integrally pulled out, so as to ensure the integrity of the curved profile of the wax mold and the connecting section, and to realize one-time integral forming of the wax mold.

[0039] The first outer mold 1, the second outer mold 2 and the first inner mold 11 are provided with a plurality of second through holes 7, and the second through holes 7 are inserted with second insertion rods 8, and after the second insertion rods 8 are inserted into the first outer mold 1, the second outer mold 2 and the first inner mold 11, a connecting hole of the lower part of the connecting arm 51 of the lower bracket 5 of the air bag can be formed, and through the connecting hole, subsequent processing of the connecting hole of the lower part of the connecting arm 51 is facilitated. In addition, the first inner mold 11 is provided with the second through hole 7, and the second insertion rod 8 can be inserted with the second through hole 7 in the first inner mold 11, so as to realize positioning and fixing of the first inner mold 11 in the first cavity. The first inner mold 11 comprises a first inner mold A and a first inner mold B, the first inner mold A is used for forming a connecting hole of a connecting section, and the first inner mold comprises the first inner mold A and the first inner mold B, which is beneficial to stripping of the first inner mold 11.

[0040] The top mold 4 is internally provided with a top mold inner mold 41, and the through hole of the connecting lug 53 is arranged at a certain angle with the vertical plane, and the plane where the connecting lug 53 is located is arranged at a certain angle with the horizontal plane, so that the structure and angle of the connecting lug 53 and the through hole of the connecting lug 53 are formed by the top mold inner mold 41. One end of the top mold inner mold 41 is provided with a column body 411 for forming a through hole, and the other end is provided with a top mold inner mold body 412, which is clamped into the top mold 4, and the top mold inner mold body 412 and the first outer mold 1 jointly form a cavity of the inner side structure of the connecting arm 51; the top mold 4 and the second outer mold 2 (i.e. the upper outer mold 22) are respectively provided with a semicircular groove, and after the top mold 4 and the second outer mold 2 are closed, the top mold inner mold body 412 is clamped with the top mold 4, and the two semicircular grooves form a circular groove for fixing the end of the column body 411.

[0041] The first inner module 11 and the second inner module 12 include a forming part for forming a forming cavity of a wax mold with the first outer mold 1, the second outer mold 2 and the top mold 4, and a connecting part for contact connection with the first outer mold 1, the upper outer mold 22, the lower outer mold 21 and the top mold 4. Through the contact of the connecting part with each mold, the precision of the first inner module 11 and the second inner module 12 in the first cavity can be enhanced, and through the connecting part, the positioning and support of the top mold 4 and the upper outer mold 22 can be realized, and the clamping precision of each mold is ensured.

[0042] The end of the connecting part of the first inner module 11 and the second inner module 12 is provided with a protrusion or a groove, and the top mold 4 is provided with a groove or a protrusion matched with the protrusion or the groove. Since the first inner module 11 and the second inner module 12 are positioned and fixed in the first cavity under the action of the bottom first inserting rod 6, the precise positioning of the top mold 4 is facilitated through the cooperation of the top mold 4 with the first inner module 11 and the second inner module 12, thereby facilitating the precision of the one-time integral molding wax mold.

[0043] The end of the second outer mold 2 (i.e. the upper outer mold 22) is provided with a positioning hole or a positioning column, and the top mold 4 is provided with a positioning column or a positioning hole. Through the positioning column inserted into the positioning hole, the connection and fixation of the top mold 4 with the first outer mold 1 and the second outer mold 2 can be enhanced after clamping. Since the first inner module 11 and the second inner module 12 ensure the clamping precision of the top mold 4, the positioning column-positioning hole cooperation mode of the top mold 4 with the upper outer mold 22 not only facilitates the fixation of the top mold 4, but also further ensures the clamping precision of the upper outer mold 22.

[0044] The first outer mold 1 is internally provided with a third inner module 14 and a fourth inner module 15, which are clamped into or embedded in the inside of the first outer mold 1, for forming a shock absorber connecting part of the air bag lower support 5 and a connecting hole at the part.

[0045] After the first outer mold 1 and the lower outer mold 21 are clamped, a gap is provided between the top of the lower outer mold 21 and the first outer mold 1. When clamped, the lower part of the upper outer mold 22 is located in the gap, and the upper outer mold 22 is assisted and supported by the lower outer mold 21, which is conducive to enhancing the support and fixation of the upper outer mold 22.

[0046] The working principle of the present application is that the third inner module 14 and the fourth inner module 15 are embedded in the first outer mold 1, the bottom mold 3 is clamped into the clamping groove at the bottom of the first outer mold 1 and the lower outer mold 21, the first inserting rod 6 is inserted through the bottom mold 3 and the first inner module 11 and the second inner module 12, and the second inserting rod 8 is inserted through the second through hole 7 of the lower outer mold 21, the first inner module 11 and the first outer mold 1, so as to realize the positioning and fixing of the first inner module 11 and the second inner module 12 between the first outer mold 1 and the lower outer mold 21. The top mold 4 is finally combined with the first inner module 11 and the second inner module 12 by cooperating with the protruding part and cooperating with the positioning column-hole of the upper outer mold 22, so as to realize the combination of the first outer mold 1, the upper outer mold 22, the lower outer mold 21, the bottom mold 3 and the top mold 4. After the combination, the complete cavity of the air bag lower support 5 is formed, and the wax injection is realized through the wax injection port of the first outer mold 1 or the second outer mold 2. When demolding, the top mold 4, the upper outer mold 22, the first inserting rod 6, the second inserting rod 8, the lower outer mold 21 and the first outer mold 1 are respectively pulled away, and the demolding operation is realized. The above demolding operation sequence is not fixed, and can be adjusted according to actual operation.

[0047] The present application realizes the one-time integral molding of the air bag lower support 5 with complex structure through the reasonable design of the wax mold structure, and also guarantees the smooth demolding of the wax mold, improves the efficiency and quality of the wax mold forming, and solves the technical problems of the wax mold forming of complex castings.

[0048] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited to the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A high-precision wax model forming mold for complex structure castings, characterized in that: It includes a first outer mold (1), a second outer mold (2), a bottom mold (3), and a top mold (4); The first outer mold (1) is provided with a first cavity for molding the inner structure of the airbag lower support (5), and the first cavity is provided with a first inner module (11) and a second inner module (12) for molding the groove structure between the double arc surfaces of the connecting arm (51) of the airbag lower support (5). The second outer mold (2) is provided with a second cavity for molding the outer structure of the airbag lower support (5). The parting surface of the second outer mold (2) and the first outer mold (1) is provided along the side of the outer arc surface of the connecting arm (51). The bottom mold (3) is used to form the bottom structure of the base (52) of the airbag lower support (5). It is fixed to the bottom of the first outer mold (1) and the second outer mold (2) through the slots of the first outer mold (1) and the second outer mold (2). The bottom mold (3) is provided with a first through hole (31) corresponding to the connection hole of the base (52). A first insert rod (6) is inserted into the first through hole (31). The first insert rod (6) passes through the bottom mold (3) and is inserted into the first blind hole (13) at the bottom of the first inner module (11) and the second inner module (12). The top mold (4) is used to form the end structure of the connecting arm (51). After it is closed with the first outer mold (1) and the second outer mold (2), the top mold (4) is engaged with the ends of the first inner module (11), the second inner module (12) and the second outer mold (2).

2. The high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: The second outer mold (2) includes a lower outer mold (21) for molding the lower part of the connecting arm (51) and an upper outer mold (22) for molding the upper part of the connecting arm (51).

3. The high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: The first outer mold (1), the second outer mold (2) and the first inner module (11) are provided with a plurality of second through holes (7), and a second insert rod (8) is inserted into the second through hole (7).

4. The high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: The top mold (4) is provided with a top mold inner module (41). The top mold inner module (41) includes a column (411) for forming the connecting ear (53) of the airbag lower support (5) and a top mold inner module body (412) for forming the bottom structure of the connecting ear (53). The top mold (4) and the second outer mold (2) are respectively provided with semi-circular grooves for fixing the end of the column (411). The top mold inner module body (412) is engaged with the top mold (4).

5. A high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: After the first inner module (11) and the second inner module (12) are inserted into the first cavity, the ends of the first inner module (11) and the second inner module (12) protrude from the first outer mold (1), and the top mold (4) closes with the first outer mold (1) and the second outer mold (2) through the protrusions of the first inner module (11) and the second inner module (12).

6. A high-precision wax model forming mold for complex structure castings according to claim 5, characterized in that: The first inner module (11) and the second inner module (12) include a molding part and a connecting part. The connecting part is in contact with the first outer mold (1), the second outer mold (2) and the top mold (4). The molding part forms a wax model cavity with the first outer mold (1), the second outer mold (2) and the top mold (4).

7. A high-precision wax model forming mold for complex structure castings according to claim 6, characterized in that: The connection between the first inner module (11) and the second inner module (12) is provided with protrusions or grooves, and the top mold (4) is provided with corresponding grooves or protrusions.

8. A high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: The second outer mold (2) is provided with a positioning hole or positioning post at its end, and the top mold (4) is provided with a positioning post or positioning hole.

9. A high-precision wax model forming mold for complex structure castings according to claim 1, characterized in that: The first outer mold (1) is provided with a third inner module (14) and a fourth inner module (15) to form the shock absorber connection part of the airbag lower support (5) and the connection hole of the part.

10. A high-precision wax model forming mold for complex structure castings according to claim 2, characterized in that: After the first outer mold (1) and the lower outer mold (21) are closed, a gap is provided between the top of the lower outer mold (21) and the first outer mold (1), and the bottom of the upper outer mold (22) is located in the gap and in contact with the lower outer mold (21).

Images