Wax mould for forming medical half support

Abstract

According to the wax mold for medical half support forming, one side of a wax mold body structure is connected with a boss through a necking section, the mold comprises an upper mold body and a lower mold body, and the lower mold body is provided with a first through hole, a plurality of second through holes and a driving structure; a lifting plate; the jacking mechanism is used for driving the lifting plate to lift; the support and the ejector pins are fixedly arranged on the lifting plate; the movable mold comprises two swing arms hinged through a hinge shaft, the support supports the hinge shaft in the vertical direction, one end of each swing arm is a movable module, and the other end of each swing arm is a driving block; when the lifting plate is located at the first position, the two movable modules are closed to form an auxiliary cavity which is in sealed connection with the first through hole, and the upper mold and the lower mold form a main cavity after being in butt joint with the end of the ejector pin. And in the ascending process of the lifting plate, the ejector pin jacks up the body structure, the movable molds synchronously ascend until the driving block and the driving structure act, and when the lifting plate is located at the second position, the two movable mold blocks are located at the positions of avoiding the bosses, so that the forming precision of the wax mold is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This invention relates to the field of wax mold technology, and in particular to a wax mold for medical semi-support molding. Background Technology

[0002] Currently, most existing medical semi-supports are made by casting. Since the medical semi-support includes a main body structure and a boss 22 located on one side of the main body structure, the boss 22 is connected to the main body structure 21 via a necked section 23. The necked section 23 and the boss 22, as... Figure 3 The image shown is a three-dimensional view of a medical half-restor. Due to the special structure of this medical half-restor, the wax molds required in the casting process are mostly made using movable-block molds. This type of mold presents two major problems: First, the operation is cumbersome. Employees need to manually align the mold blocks with the mold base and manually apply the mold closing force. This is not only labor-intensive, but also prone to insufficient product molding accuracy due to misalignment of the mold blocks, with a scrap rate as high as 8%-12%. Second, mold removal is inconvenient. Removing the movable block requires employees to first use tools to pry the movable block out of the mold cavity, and then manually reach into the mold to remove the product. The operation involves many steps (usually 3-5 steps), resulting in high labor intensity. Furthermore, the movable block is easily scratched on the product surface and damaged at the joints during the prying process, leading to low product qualification rate and high mold maintenance costs. Summary of the Invention

[0003] In response to the shortcomings of the existing production technology, the applicant provides a wax mold for medical semi-tent molding, thereby improving the molding accuracy of the wax mold and reducing the labor intensity of operators.

[0004] The technical solution adopted in this invention is as follows: A wax mold for medical semi-support molding, the wax mold including a body structure, one side of the body structure being connected to a boss via a necked section, the mold including: an upper mold; The lower mold is provided with a first through hole, multiple second through holes, and a driving structure. The lifting mechanism is fixedly installed relative to the lower mold; The lifting plate is located on the side of the lower mold opposite to the upper mold, and the lifting mechanism is connected to the lifting plate in a transmission manner, so that the lifting plate moves up and down vertically; The bracket is fixedly mounted on the lifting plate; The movable mold includes a rod-shaped swing arm and a hinge shaft. The middle of the two swing arms is hinged through the hinge shaft. The bracket is connected to the hinge shaft and supports the hinge shaft vertically. One end of the swing arm is a movable module and the other end is a drive block. Multiple ejector pins are fixedly mounted on the lifting plate, and the ejector pins are slidably and sealingly connected to the second through hole; When the lifting plate is in the first position, the two movable modules close and form a secondary cavity for forming the boss and the necking section. The two movable modules are sealed and connected to the first through hole. After the upper mold and the lower mold are docked, they form a main cavity with the end of the ejector pin for forming the body structure. During the upward movement of the lifting plate, the ejector pin lifts the main body structure, and the movable mold rises synchronously until the driving block and the driving structure interact, at which point the two movable modules move away from each other. When the lifting plate is in the second position, the two movable modules are positioned to avoid the boss.

[0005] As a further improvement to the above technical solution: The necked section and the boss are a rotating body coaxially arranged. The surface of the necked section facing the boss is a first rotating surface. The cross-sectional profile diameter of the first rotating surface gradually decreases from the necked section to the boss. The surface of the boss facing the necked section is a second rotating surface, and the cross-sectional profile diameter of the second rotating surface gradually decreases from the boss to the necked section.

[0006] The driving structure is a through hole penetrating the lower mold, and the driving structure is located directly below the first through hole; The swing arm includes an upper rod section and a lower rod section. One end of the upper rod section is provided with the movable module, and the other end of the upper rod section is fixedly connected to one end of the lower rod section. The other end of the lower rod section is provided with the drive block. The upper rod segment corresponds to the first through hole, the lower rod segment corresponds to the driving structure, the driving block is provided with a driving inclined surface, the two lower rod segments are hinged by a hinge shaft and elastically connected by a first elastic element, the hinge shaft is located between the movable module and the first elastic element, the outer wall surface of the two lower rod segments is slidably connected to the driving structure, and there is a swing gap between the two lower rod segments; During the lifting process, the lower rod section moves upward in the driving structure, the driving inclined surface acts on the lower end of the driving structure, the first elastic element is compressed, the swing gap is reduced, until the lifting plate is in the second position and the upper rod section is in the first through hole; During the descent of the lifting plate, after the lower end of the driving structure moves away from the driving inclined surface, the two movable modules move closer to each other under the elastic force of the first elastic element until the lifting plate is in the first position, at which point the movable module is located in the first through hole.

[0007] The lower rod section is provided with a sliding surface. When the two movable modules are closed, the two sliding surfaces are parallel to each other and opposite to each other. The sliding surface is in surface contact with the inner wall surface of the drive structure.

[0008] The sliding surface is a plane.

[0009] The lower rod section is provided with a first limiting surface at one end connected to the upper rod section, which is parallel to the axis of the hinge shaft. When the lifting plate is in the second position, the first limiting surface is in contact with the inner wall surface of the driving structure, and there is an avoidance gap between the upper rod section and the inner wall surface of the first through hole.

[0010] The drive block is provided with a second limiting surface. The second limiting surfaces on the two drive blocks are arranged opposite to each other. When the lifting plate is in the second position, the second limiting surfaces of the two drive blocks are in contact, and the drive inclined surface is in contact with the lower end of the drive structure.

[0011] The lower end of the drive structure has an arc-shaped chamfer at the contact point with the drive ramp.

[0012] The lifting plate is slidably disposed vertically relative to the lower mold; It also includes a base that provides fixed support for the lower mold, and the base is provided with the lifting mechanism, which includes: A rotating shaft is rotatably mounted on the base. The cam is fixedly mounted on the rotating shaft and located below the lifting plate; During forward rotation of the shaft, the vertical height of the contact position between the cam and the lower surface of the lifting plate relative to the axis of the shaft increases, thereby driving the lifting plate to rise. During reverse rotation of the shaft, the vertical height of the contact position between the cam and the lower surface of the lifting plate relative to the axis of the shaft decreases, thereby driving the lifting plate to fall.

[0013] A guide rod is fixedly provided on the lifting plate, and a guide hole is provided on the lower mold that slides with the guide rod. It also includes a second elastic element, which elastically connects the lower mold to the lifting plate. The second elastic element is in a compressed state.

[0014] The beneficial effects of this invention are as follows: This invention features a compact and reasonable structure and is easy to operate. By installing a movable mold with an openable and closable movable module on a lifting plate below the lower mold, along with ejector pins for lifting the wax model to demold it, the movable mold is used to form the boss on the wax model. The lifting plate raises and lowers the movable mold to interact with the driving structure or the first through hole on the lower mold, enabling the movable module to open and close automatically during the wax model's ascent. This improves the molding accuracy of the wax model and reduces the labor intensity of the operators.

[0015] The present invention also includes the following advantages: (1) A through-hole structure is used as the driving structure. The driving structure is sleeved outside the movable mold. A driving inclined surface is set on the driving block at the lower end of the lower rod section. During the movement of the movable mold relative to the driving structure, the driving inclined surface interacts with the lower end of the driving structure, converting the vertical displacement of the lifting plate into the force of driving the swing arm to swing. After the swing arm swings, the movable module opens. A first elastic element is installed between the two swing arms. After the lifting plate descends and the driving inclined surface moves away from the lower end of the driving structure, the swing arm is driven to swing in the opposite direction by the elastic force of the first elastic element, and the movable module closes. The automatic opening and closing of the movable module is realized through a simple structure.

[0016] (2) The sliding surface contacts the driving structure surface to guide the moving mold to rise. Combined with the elastic force of the first elastic element, the boss and the main body structure rise synchronously and stably during the wax mold rising process until the moving module is in the middle position that can be opened.

[0017] (3) The drive block is provided with a drive ramp, and when the lifting plate is in the second position, the drive ramp contacts the lower end of the drive structure. The drive block is located outside the drive structure. The dovetail structure formed by the two drive blocks is engaged with the lower end of the drive structure through the contact of the two second limiting surfaces, thus limiting the swing angle of the swing arm. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the wax mold of the present invention.

[0019] Figure 2 This is an exploded view of the present invention.

[0020] Figure 3 This is a perspective view of the wax model or medical half-support of the present invention.

[0021] Figure 4 for Figure 3 A partial sectional view.

[0022] Figure 5 This is a cross-sectional view of the wax mold of the present invention (the lifting plate is located in the first position).

[0023] Figure 6 This is a cross-sectional view of the wax mold of the present invention (the lifting plate is located in the middle).

[0024] Figure 7 This is a cross-sectional view of the wax mold of the present invention (the lifting plate is located in the second position).

[0025] Figure 8 for Figure 7 Enlarged view of a portion of point A in the middle.

[0026] Figure 9 This is an exploded view of the wax mold of the present invention.

[0027] Figure 10 This is an exploded view (axiomatic section) of the wax mold of the present invention.

[0028] Figure 11 This is a cross-sectional view of the movable mold of the present invention.

[0029] in: 1. Place the mold; 2. Wax model; 21. Body structure; 22. Boss; 23. Neck section; 24. Second rotating surface; 25. First rotating surface; 3. Movable mold; 31. Swing arm; 311. Movable module; 312. Drive block; 3121. Drive inclined surface; 3122. Second limiting surface; 313. Lower rod section; 3131. First limiting surface; 3132. Sliding surface; 314. Upper rod section; 32. Hinge shaft; 34. First elastic element; 35. Swing clearance; 4. Lower mold; 41. First through hole; 42. Second through hole; 43. Lower mold core; 44. Drive structure; 441. Arc-shaped chamfer; 45. Guide hole; 5. Support; 6. Ejector pin; 7. Lifting plate; 71. Guide rod; 72. Second elastic element; 8. Lifting mechanism; 81. Rotary shaft; 82. Cam; 83. Handle; 84. Limit block; 9. Base. Detailed Implementation

[0030] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0031] Example 1: like Figures 1-9 As shown, the wax mold for medical semi-support molding in this embodiment includes a body structure 21. One side of the body structure 21 is connected to a boss 22 through a necking section 23. The mold includes an upper mold 1, a lower mold 4, a lifting mechanism 8, a lifting plate 7, a bracket 5, a movable mold 3, and multiple ejector pins 6.

[0032] The lower mold 4 is provided with a first through hole 41, multiple second through holes 42 and a driving structure 44; The lifting mechanism 8 is fixedly set relative to the lower mold 4; The lifting plate 7 is located on the side of the lower mold 4 away from the upper mold 1. The lifting mechanism 8 is connected to the lifting plate 7 in a transmission manner, so that the lifting plate 7 moves up and down vertically. The bracket 5 is fixedly mounted on the lifting plate 7; The movable mold 3 includes a rod-shaped swing arm 31 and a hinge shaft 32. The middle of the two swing arms 31 is hinged through the hinge shaft 32. The bracket 5 is connected to the hinge shaft 32 and supports the hinge shaft 32 vertically. One end of the swing arm 31 is the movable module 311 and the other end is the drive block 312. Multiple ejector pins 6 are fixedly mounted on the lifting plate 7, and the ejector pins 6 are slidably and sealingly connected to the second through hole 42. When the lifting plate 7 is in the first position, the two movable modules 311 close and form a secondary cavity for forming the boss 22 and the necked section 23. The two movable modules 311 are sealed and connected to the first through hole 41. After the upper mold 1 and the lower mold 4 are connected, they form a main cavity for forming the body structure 21 with the end of the ejector pin 6. During the upward movement of the lifting plate 7, the ejector pin 6 lifts the main body structure 21, and the movable mold 3 rises synchronously until the drive block 312 and the drive structure 44 work together, at which point the two movable modules 311 move away from each other. When the lifting plate 7 is in the second position, the two movable modules 311 are in the position of avoiding the boss 22.

[0033] Specifically, such as Figure 9 As shown, the lower mold 4 includes a lower mold core 43 separately disposed on the lower mold 4. A first through hole 41 is provided on the lower mold core 43, and a second through hole 42 passes through the lower mold core 43 and the entire lower mold 4 from the lower mold core 43.

[0034] When molding wax mold 2, the lifting plate 7 is in the first position, such as Figure 5 As shown, the secondary cavity is connected to the main cavity, forming a cavity with a shape consistent with the outer shape of wax model 2; when wax model 2 is removed, as... Figure 7 As shown, the lifting plate 7 is in the second position, the two movable modules 311 on the movable mold 3 automatically open to avoid the boss 22, and the main body structure 21 of the wax mold 2 is supported by the ejector pin 6.

[0035] By installing a movable mold 3 with an openable and closable movable module 311 and an ejector pin 6 for lifting the wax mold 2 to demold the wax mold 2 on a lifting plate 7 below the lower mold 4, the movable mold 3 is used to form the boss 22 on the wax mold 2. By lifting and lowering the lifting plate 7, the movable mold 3 interacts with the driving structure 44 or the first through hole 41 on the lower mold 4. During the process of the wax mold rising, the movable module 311 is automatically opened and closed, thereby improving the molding accuracy of the wax mold 2 and reducing the labor intensity of the operator.

[0036] In this embodiment, as Figure 3 , Figure 4 As shown, the necked section 23 and the boss 22 are coaxial rotating bodies. The surface of the necked section 23 facing the boss 22 is the first rotating surface 25. The diameter of the cross-sectional profile of the first rotating surface 25 gradually decreases from the necked section 23 to the boss 22. The surface of the boss 22 facing the necked section 23 is the second rotating surface 24, and the diameter of the cross-sectional profile of the second rotating surface 24 gradually decreases from the boss 22 to the necked section 23.

[0037] Specifically, after the first rotating surface 25 and the second rotating surface 24 are connected, they form an arc surface that is concave towards the center line of the rotating body, such as... Figure 4 As shown; the end face of the boss 22 facing away from the necked section 23 is a plane; As the active modules 311 move away from each other, they move away from the necked section 23 and the boss 22 from both sides of the rotating body. At the same time, under the lifting action of the ejector pin 6, the boss 22 moves away from the inner surface of the sub-cavity vertically.

[0038] Example 2: like Figures 1-9 As shown, based on Embodiment 1, the wax mold for medical half-tent molding in this embodiment has a driving structure 44 that penetrates the lower mold 4 through a through hole, and the driving structure 44 is located directly below the first through hole 41. The swing arm 31 includes an upper rod section 314 and a lower rod section 313. One end of the upper rod section 314 is provided with a movable module 311, and the other end of the upper rod section 314 is fixedly connected to one end of the lower rod section 313. The other end of the lower rod section 313 is provided with a drive block 312. The upper rod segment 314 corresponds to the first through hole 41, and the lower rod segment 313 corresponds to the drive structure 44. The drive block 312 is provided with a drive inclined surface 3121. The two lower rod segments 313 are hinged by the hinge shaft 32 and elastically connected by the first elastic element 34. The hinge shaft 32 is located between the movable module 311 and the first elastic element 34. The outer wall surfaces of the two lower rod segments 313 are slidably connected to the drive structure 44. There is a swing gap 35 between the two lower rod segments 313. During the lifting process of the lifting plate 7, the lower rod section 313 moves upward in the drive structure 44, the drive inclined surface 3121 interacts with the lower end of the drive structure 44, the first elastic element 34 is compressed, the swing gap 35 is reduced, until the lifting plate 7 is in the second position and the upper rod section 314 is in the first through hole 41. During the descent of the lifting plate 7, after the lower end of the drive structure 44 moves away from the drive inclined surface 3121, the two movable modules 311 move closer to each other under the elastic force of the first elastic element 34 until the lifting plate 7 is in the first position, at which point the movable module 311 is located in the first through hole 41.

[0039] Specifically, the first elastic element 34 is a compression spring; such as Figure 11As shown, the cross-section of the upper rod segment 314 is smaller than that of the lower rod segment 313, and the overall cross-sectional dimension of the two upper rod segments 314 is smaller than the diameter of the first through hole 41, which is used to provide space for the upper rod segment 314 to swing. The cross-section of the movable module 311 is larger than that of the upper rod segment 314. A transition slope is provided at the connection between the upper rod segment 314 and the movable module 311. When the movable module 311 moves toward the first through hole 41, it contacts the first through hole 41 and plays a guiding role. The structure of the movable mold 3 is similar to pliers. When the two movable modules 311 are closed, the two upper rod segments 314 fit together, the axes of the two lower rod segments 313 are parallel, the width of the swing gap 35 is relatively uniform and is H, and the two driving slopes 3121 are opposite to each other and face the end of the driving structure 44. The upper end of the bracket 5 and the hinge shaft 32 are both located inside the driving structure 44.

[0040] During the use of the wax mold in this embodiment: The lifting plate 7 is in the first position, and the wax mold 2 is formed; After the wax mold 2 is formed, the lifting mechanism 8 is activated to raise the lifting plate 7; During the upward movement of the lifting plate 7, the movable mold 3 remains in the same position and, together with the ejector pin 6, lifts the wax mold 2 until the movable modules 311 can move away from each other (i.e., open). At this point, the lifting plate 7 rises to the middle position between the first and second positions. Figure 6 As shown; Then, as the lifting plate 7 rises to the second position, the driving inclined surface 3121 interacts with the lower end of the driving structure 44. As the wax mold 2 continues to rise, the two moving modules 311 move further and further away from each other. When the lifting plate 7 is in the second position, the two moving modules 311 are located at the position of avoiding the boss 22. Finally, remove wax model 2; Then the lifting mechanism 8 is activated again to lower the lifting plate 7. When the lifting plate 7 is in the first position, the ejector pin 6 and the movable module 311 are connected to the surface of the lower mold core 43 at the first through hole 41 and the second through hole 42 on the lower mold core 43 to form the inner surface of the cavity. After the upper mold 1 and the lower mold 4 are joined together, the wax mold 2 is formed again.

[0041] A through-hole structure is used as the driving structure 44, which is sleeved outside the movable mold 3. A driving inclined surface 3121 is provided on the driving block 312 at the lower end of the lower rod section 313. During the movement of the movable mold 3 relative to the driving structure 44, the driving inclined surface 3121 interacts with the lower end of the driving structure 44, converting the vertical displacement of the lifting plate 7 into the force that drives the swing arm 31 to swing. After the swing arm 31 swings, the movable module 311 opens. A first elastic element 34 is installed between the two swing arms 31. After the lifting plate 7 descends and the driving inclined surface 3121 moves away from the lower end of the driving structure 44, the elastic force of the first elastic element 34 drives the swing arm 31 to swing in the opposite direction, and the movable module 311 closes. The automatic opening and closing of the movable module 311 is achieved through a simple structure.

[0042] Furthermore, such as Figures 8-11 As shown, the lower rod section 313 is provided with a sliding surface 3132. When the two movable modules 311 are closed, the two sliding surfaces 3132 are parallel to each other and opposite to each other. The sliding surface 3132 is in surface contact with the inner wall surface of the drive structure 44.

[0043] The sliding surface 3132 contacts the driving structure 44 to guide the movable mold 3 to rise. Combined with the elastic force of the first elastic element 34, the boss 22 and the main body structure 21 rise synchronously and stably during the wax mold 2's rising process until the movable module 311 is in the middle position where it can be opened.

[0044] The sliding surface 3132 is a plane. Specifically, the cross-section of the lower rod segment 313 is rectangular, and the sliding surface 3132 is the outer surface of the lower rod segment 313.

[0045] The lower rod section 313 is provided with a first limiting surface 3131 that is parallel to the axis of the hinge shaft 32 at one end connected to the upper rod section 314. When the lifting plate 7 is in the second position, the first limiting surface 3131 is in contact with the inner wall surface of the drive structure 44, and there is a clearance between the upper rod section 314 and the inner wall surface of the first through hole 41.

[0046] The first limiting surface 3131 is in contact with the inner wall of the drive structure 44 to limit the swing angle of the swing arm 31, thereby ensuring that the upper rod section 314 does not contact the first through hole 41 and extending the service life of the movable mold 3.

[0047] The drive block 312 is provided with a second limiting surface 3122. The second limiting surfaces 3122 on the two drive blocks 312 are arranged opposite to each other. When the lifting plate 7 is in the second position, the second limiting surfaces 3122 of the two drive blocks 312 are in contact, and the drive inclined surface 3121 is in contact with the lower end of the drive structure 44.

[0048] The drive block 312 is provided with a drive ramp 3121, and when the lifting plate 7 is in the second position, the drive ramp 3121 contacts the lower end of the drive structure 44. The drive block 312 is partially located outside the drive structure 44. The dovetail structure formed by the two drive blocks 312 is engaged with the lower end of the drive structure 44 through the contact of the two second limiting surfaces 3122, thereby limiting the swing angle of the swing arm 31.

[0049] Specifically, the first limiting surface 3131 and the second limiting surface 3122 are parallel to each other, as shown below. Figure 11 As shown, the angles between the first limiting surface 3131 and the second limiting surface 3122 relative to the axis of the lower rod segment 313 are opposite, both being α. The inclination angles of the first limiting surface 3131 and the second limiting surface 3122 relative to the axis of the swing arm 31 are related to the specific structural dimensions of the boss 22 on the wax mold 2 and the necking section 23. In a specific embodiment, the angle is 4 degrees.

[0050] Furthermore, such as Figure 10 As shown, the lower end of the drive structure 44 has an arc-shaped chamfer 441 at the contact point with the drive inclined surface 3121. This makes the relative sliding effect smoother when the drive inclined surface 3121 interacts with the lower end of the drive structure 44.

[0051] Example 3: like Figures 1-9 As shown, based on the above embodiments, the lifting plate 7 is slidably arranged vertically relative to the lower mold 4; it also includes a base 9, which fixes and supports the lower mold 4, and a lifting mechanism 8 is provided on the base 9, which includes a rotating shaft 81 and a cam 82.

[0052] The rotating shaft 81 is rotatably mounted on the base 9; Cam 82 is fixedly mounted on rotating shaft 81 and located below lifting plate 7; During the forward rotation of the rotating shaft 81, the vertical height of the contact position between the cam 82 and the lower surface of the lifting plate 7 relative to the axis of the rotating shaft 81 increases, thereby driving the lifting plate 7 to rise. During the reverse rotation of the rotating shaft 81, the vertical height of the contact position between the cam 82 and the lower surface of the lifting plate 7 relative to the axis of the rotating shaft 81 decreases, thereby driving the lifting plate 7 to fall.

[0053] Specifically, the lifting mechanism 8 also includes a handle 83 fixed to the end of the rotating shaft 81 for driving the rotating shaft 81 to rotate; the base 9 is provided with a limiting block 84, which contacts the lifting plate 7 when the lifting plate 7 is in the second position.

[0054] A guide rod 71 is fixed on the lifting plate 7, and a guide hole 45 is provided on the lower mold 4 to slide with the guide rod 71. It also includes a second elastic member 72, which elastically connects the lower mold 4 and the lifting plate 7. The second elastic member 72 is in a compressed state.

[0055] A second elastic element 72 in a compressed state is provided between the lifting plate 7 and the lower mold 4 to assist the lifting plate 7 in moving downward.

[0056] Specifically, when the lifting plate 7 is in the second position, the cam 82 is in force balance, so that the lifting plate 7 remains in the second position.

[0057] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A wax mold for forming medical semi-tissues, characterized in that: The wax model (2) includes a body structure (21), and a boss (22) is connected to one side of the body structure (21) through a necked section (23). The mold includes an upper mold (1). The lower mold (4) is provided with a first through hole (41), a plurality of second through holes (42) and a driving structure (44). The lifting mechanism (8) is fixedly arranged relative to the lower mold (4); The lifting plate (7) is located on the side of the lower mold (4) away from the upper mold (1). The lifting mechanism (8) is connected to the lifting plate (7) in a transmission manner, so that the lifting plate (7) moves up and down vertically. The bracket (5) is fixedly mounted on the lifting plate (7); The movable mold (3) includes a rod-shaped swing arm (31) and a hinge shaft (32). The middle parts of the two swing arms (31) are hinged through the hinge shaft (32). The bracket (5) is connected to the hinge shaft (32) and supports the hinge shaft (32) vertically. One end of the swing arm (31) is a movable module (311) and the other end is a drive block (312). Multiple ejector pins (6) are fixedly mounted on the lifting plate (7), and the ejector pins (6) slide and are sealed to the second through hole (42); When the lifting plate (7) is in the first position, the two movable modules (311) close and form a secondary cavity for forming the boss (22) and the necked section (23). The two movable modules (311) are sealed and connected to the first through hole (41). After the upper mold (1) and the lower mold (4) are connected, they form a main cavity for forming the body structure (21) with the end of the ejector pin (6). During the upward movement of the lifting plate (7), the ejector pin (6) lifts the main body structure (21), and the movable mold (3) rises synchronously until the driving block (312) and the driving structure (44) work together, at which point the two movable modules (311) move away from each other. When the lifting plate (7) is in the second position, the two movable modules (311) are in a position that avoids the boss (22).

2. The wax mold for medical semi-support molding as described in claim 1, characterized in that: The necked section (23) and the boss (22) are coaxial rotating bodies. The surface of the necked section (23) facing the boss (22) is the first rotating surface (25). The cross-sectional profile diameter of the first rotating surface (25) gradually decreases from the necked section (23) to the boss (22). The surface of the boss (22) facing the necked section (23) is the second rotating surface (24), and the diameter of the cross-sectional profile of the second rotating surface (24) gradually decreases from the boss (22) to the necked section (23).

3. The wax mold for medical semi-support molding as described in claim 1, characterized in that: The driving structure (44) is a through hole that penetrates the lower mold (4), and the driving structure (44) is located directly below the first through hole (41); The swing arm (31) includes an upper rod section (314) and a lower rod section (313). One end of the upper rod section (314) is provided with the movable module (311), and the other end of the upper rod section (314) is fixedly connected to one end of the lower rod section (313). The other end of the lower rod section (313) is provided with the drive block (312). The upper rod segment (314) corresponds to the first through hole (41), the lower rod segment (313) corresponds to the driving structure (44), the driving block (312) is provided with a driving inclined surface (3121), the two lower rod segments (313) are hinged by a hinge shaft (32) and elastically connected by a first elastic element (34), the hinge shaft (32) is located between the movable module (311) and the first elastic element (34), the outer wall surface of the two lower rod segments (313) is slidably connected to the driving structure (44), and there is a swing gap (35) between the two lower rod segments (313). During the upward movement of the lifting plate (7), the lower rod section (313) moves upward in the driving structure (44), the driving inclined surface (3121) interacts with the lower end of the driving structure (44), the first elastic element (34) is compressed, the swing gap (35) decreases, until the lifting plate (7) is in the second position and the upper rod section (314) is in the first through hole (41); During the descent of the lifting plate (7), after the lower end of the driving structure (44) moves away from the driving inclined surface (3121), the two active modules (311) move closer to each other under the elastic force of the first elastic element (34) until the lifting plate (7) is in the first position, at which point the active module (311) is located in the first through hole (41).

4. The wax mold for medical semi-support molding as described in claim 3, characterized in that: The lower rod section (313) is provided with a sliding surface (3132). When the two movable modules (311) are closed, the two sliding surfaces (3132) are parallel to each other and opposite to each other. The sliding surface (3132) is in surface contact with the inner wall surface of the driving structure (44).

5. The wax mold for medical semi-tissue molding as described in claim 4, characterized in that: The sliding surface (3132) is a plane.

6. The wax mold for medical semi-support molding as described in claim 3, characterized in that: The lower rod section (313) is provided with a first limiting surface (3131) at one end connected to the upper rod section (314), which is parallel to the axis of the hinge shaft (32). When the lifting plate (7) is in the second position, the first limiting surface (3131) is in contact with the inner wall surface of the driving structure (44), and there is a clearance between the upper rod section (314) and the inner wall surface of the first through hole (41).

7. The wax mold for medical semi-support molding as described in claim 3, characterized in that: The drive block (312) is provided with a second limiting surface (3122). The second limiting surfaces (3122) on the two drive blocks (312) are arranged opposite to each other. When the lifting plate (7) is in the second position, the second limiting surfaces (3122) of the two drive blocks (312) are in contact, and the drive inclined surface (3121) is in contact with the lower end of the drive structure (44).

8. The wax mold for medical semi-tissue molding as described in claim 3, characterized in that: The lower end of the drive structure (44) has an arc-shaped chamfer (441) at the contact point with the drive inclined surface (3121).

9. The wax mold for medical semi-support molding as described in claim 1, characterized in that: The lifting plate (7) is slidably disposed vertically relative to the lower mold (4); It also includes a base (9), which fixes and supports the lower mold (4), and the base (9) is provided with the lifting mechanism (8), which includes: A rotating shaft (81) is rotatably mounted on the base (9); The cam (82) is fixedly mounted on the rotating shaft (81) and located below the lifting plate (7); During the forward rotation of the shaft (81), the vertical height of the contact position between the cam (82) and the lower surface of the lifting plate (7) relative to the axis of the shaft (81) increases, thereby driving the lifting plate (7) to rise. During the reverse rotation of the shaft (81), the vertical height of the contact position between the cam (82) and the lower surface of the lifting plate (7) relative to the axis of the shaft (81) decreases, thereby driving the lifting plate (7) to fall.

10. The wax mold for medical semi-support molding as described in claim 9, characterized in that: The lifting plate (7) is fixedly provided with a guide rod (71), and the lower mold (4) is provided with a guide hole (45) that slides with the guide rod (71). It also includes a second elastic element (72), which elastically connects the lower mold (4) and the lifting plate (7). The second elastic element (72) is in a compressed state.

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