A mold for manufacturing a shoulder joint spacer and a method of manufacturing the same

Abstract

The application discloses a mold for manufacturing a shoulder joint spacer and a preparation method thereof, belongs to the technical field of shoulder joint spacer preparation, and solves the problems of uneven distribution of medicine application grooves and the inability to flexibly adjust the size, length and the like according to requirements, and comprises a lower mold box, an upper mold box, an intramedullary bone cement silica gel forming adjusting mold and a ball head forming adjusting mold which are sleeved in the lower mold box and the upper mold box, a pouring gate which is arranged on the lower mold box and the upper mold box, a plugging plug which is arranged in the pouring gate, a first positioning support column and a second positioning support column which are arranged in the lower mold box, a third positioning support column and a fourth positioning support column which are arranged in the upper mold box, and a metal support rod which is arranged on the axial center lines of the intramedullary bone cement silica gel forming adjusting mold and the ball head forming adjusting mold; and the intramedullary bone cement silica gel forming adjusting mold and the ball head forming adjusting mold are uniformly provided with protruding portions.

Description

Technical Field

[0001] This invention relates to the field of shoulder joint spacer manufacturing technology, and in particular to a mold for manufacturing a shoulder joint spacer and its manufacturing method. Background Technology

[0002] A joint spacer is an implant used temporarily or permanently to manage complications such as infection after total joint replacement surgery. It serves three functions: maintaining joint space, releasing high-concentration antibiotics locally, and allowing or restricting joint movement. Existing joint spacers are similar to those described in "Publication No. CN217938480U, entitled 'A Bone Spacer'", which involves implanting a (metal) skeleton within the bone spacer and having several drug delivery grooves on its surface.

[0003] Currently, existing spacer molds, such as those published in CN216831870U entitled "A Molding Mold for Bone Spacers," include an upper mold, a lower mold, and a skeleton. The upper mold and the lower mold mate to form a cavity, and the skeleton is disposed within the cavity. The sides of the upper and lower molds are provided with casting pipes communicating with the cavity, and the inner surface of the cavity has several protrusions. Another example is the article "Creation of a Custom-Length, Humeral Antibiotic Cement Spacer for Use in Treatment of Shoulder Periprosthetic Joint Infection." The above-mentioned technologies have the following technical problems:

[0004] First, to facilitate demolding, the upper and lower molds are designed in a 50 / 50 configuration. It is not convenient to place the protrusions corresponding to the injection grooves for the bone cement at the joint of the upper and lower molds. If the protrusions are placed at the joint of the upper and lower molds, it is not convenient for the upper and lower molds to close together and the protrusions are not easy to overlap. In addition, placing the protrusions at the joint of the upper and lower molds makes it difficult for the upper and lower molds to fit together tightly, and the joint spacer needs to be ground later.

[0005] Second, the existing molds cannot guarantee that the (metal) skeleton is centered. The existing technology uses external auxiliary positioning to install the (metal) skeleton, which needs to be removed later. The front end of the (metal) skeleton has no positioning support and the positioning is inaccurate.

[0006] Third, since users' shoulder joint sizes and lengths vary, using the aforementioned technology would require developing multiple sets of molds or repeated grinding processes. Therefore, the fabrication of existing shoulder joint spacers is quite complex.

[0007] Furthermore, another example is the technology disclosed in "Publication No. CN104546232A, entitled 'Combined Shoulder Joint Spacer Mold'", which consists of three parts: a ball head, a lower main body, and a middle metal support rod. It also suffers from the inability to guarantee reliable positioning and installation of the metal support rod, dimensional flexibility, and reliable placement of the protrusions.

[0008] Therefore, there is an urgent need to propose a mold for manufacturing shoulder joint spacers that is simple in structure, highly efficient and reliable in assembly, and accurate in positioning, as well as its preparation method. Summary of the Invention

[0009] To address the above problems, the present invention aims to provide a mold for flexibly adjusting the manufacture of a shoulder joint spacer and its preparation method. The technical solution adopted by the present invention is as follows:

[0010] A mold for manufacturing a shoulder joint spacer and for casting the shoulder joint spacer includes a lower mold box and an upper mold box that are snapped together; an intramedullary bone cement silicone molding and adjusting mold and a ball head molding and adjusting mold fitted inside the lower mold box and the upper mold box; a pouring port on the lower mold box and the upper mold box, which is located on the lower mold box and the upper mold box and is inserted into the intramedullary bone cement silicone molding and adjusting mold and the ball head molding and adjusting mold; a sealing plug placed in the pouring port; a first positioning support column and a second positioning support column placed inside the lower mold box; and a third positioning support column placed inside the upper mold box. The system includes a first positioning support column and a fourth positioning support column, as well as a metal support rod placed on the axis of the intramedullary bone cement silicone molding adjustment mold and the ball head molding adjustment mold, and supported by the first positioning support column, the second positioning support column, the third positioning support column, and the fourth positioning support column; the intramedullary bone cement silicone molding adjustment mold has several first protrusions evenly arranged inside; the ball head molding adjustment mold has several second protrusions evenly arranged inside; the first positioning support column and the third positioning support column penetrate the intramedullary bone cement silicone molding adjustment mold and are pressed against the metal support rod.

[0011] Furthermore, the lower part of the metal support rod is provided with a second positioning blind hole and a second support strip blind hole; the upper part of the metal support rod is provided with a first positioning blind hole and a first support strip blind hole; the first positioning support column is disposed through the intramedullary bone cement silicone molding adjustment mold and is sleeved and connected to the second positioning blind hole; the third positioning support column is disposed through the intramedullary bone cement silicone molding adjustment mold and is sleeved and connected to the first positioning blind hole; the end of the second positioning support column is placed in the second support strip blind hole, and the end of the fourth positioning support column is placed in the first support strip blind hole.

[0012] Furthermore, the first positioning blind hole and the second positioning blind hole are staggered, and the first support strip blind hole and the second support strip blind hole are also staggered.

[0013] Furthermore, the lower mold box and the upper mold box are provided with several cutting grooves at their rear ends; the cutting grooves are located at the rear end of the intramedullary bone cement silicone molding adjustment mold.

[0014] Furthermore, the lower mold box and the upper mold box are provided with an extension opening at their rear ends; the metal support rod is provided with an extension connection threaded hole at its rear end.

[0015] Furthermore, the lower mold box has a first ball-head molding adjustment mold mounting cavity, a first connecting common cavity, and a first intramedullary bone cement silicone molding adjustment mold mounting cavity that are interconnected; the upper mold box has a second ball-head molding adjustment mold mounting cavity, a second connecting common cavity, and a second intramedullary bone cement silicone molding adjustment mold mounting cavity that are interconnected; the intramedullary bone cement silicone molding adjustment mold is fitted inside the first and second intramedullary bone cement silicone molding adjustment mold mounting cavities; the ball-head molding adjustment mold is fitted inside the first and second ball-head molding adjustment mold mounting cavities; the pouring port is connected to the first and second connecting common cavities.

[0016] Furthermore, the lower mold box is provided with several first positioning posts; the upper mold box is provided with positioning holes corresponding to the first positioning posts; several buckle seats are provided around the perimeter of the upper mold box; and buckles corresponding to the buckle seats are provided on the lower mold box.

[0017] Furthermore, a first injection pipe is provided on the lower mold box; a second injection pipe is provided on the upper mold box; the first injection pipe and the second injection pipe together form the pouring gate.

[0018] Furthermore, the intramedullary bone cement silicone molding adjustment mold has a first side hole and a second side hole; the first positioning support column passes through the first side hole, and the third positioning support column passes through the second side hole.

[0019] A method for preparing a shoulder joint spacer, comprising casting using a shoulder joint spacer mold; the method for preparing the shoulder joint spacer includes the following steps:

[0020] The rear end of the metal support rod is placed into the intramedullary bone cement silicone molding adjustment mold, with the second positioning blind hole and the second support strip blind hole facing the lower mold box.

[0021] The metal support rod and the intramedullary bone cement silicone molding adjustment mold are fitted into the lower mold box. The first positioning support column passes through the intramedullary bone cement silicone molding adjustment mold and is fitted into the second positioning blind hole. The second positioning support column is placed in the second support strip blind hole.

[0022] Place the ball-head forming and adjusting mold into the lower mold box;

[0023] Close the mold box and press the third and fourth positioning support columns against the upper part of the metal support rod;

[0024] Material is injected through the pouring gate and sealed using a plug;

[0025] After the material has solidified, open the upper mold box and remove the ball head forming adjustment mold;

[0026] Cut open the silicone molding mold for intramedullary bone cement to obtain the shoulder joint spacer.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] This invention utilizes an intramedullary bone cement silicone molding adjustment mold with a constant outer diameter and an inner diameter adjustable according to the patient's needs, as well as a ball-head molding adjustment mold. By simply replacing these two molds, it can be adapted to meet the requirements of different patients. Furthermore, this invention features several first protrusions evenly arranged in a ring within the intramedullary bone cement silicone molding adjustment mold and equally evenly arranged within the ball-head molding adjustment mold, ensuring that the medication application grooves are evenly distributed around the periphery of the shoulder joint spacer, facilitating subsequent even medication application.

[0029] This invention provides support by setting a first positioning support column, a second positioning support column, a third positioning support column, and a fourth positioning support column, and by setting a first positioning blind hole, a second positioning blind hole, a first support strip blind hole, and a second support strip blind hole on the metal support rod to support the metal support rod. Regardless of how the inner diameter of the intramedullary bone cement silicone molding adjustment mold and the ball head molding adjustment mold changes, the metal support rod is always positioned on the axis of the shoulder joint spacer, ensuring the support strength of the shoulder joint spacer.

[0030] This invention features several cutting grooves at the rear ends of the lower and upper mold boxes, an extension opening at the rear ends of both boxes, and an extension connection threaded hole at the rear end of the metal support rod. An extended metal rod can be connected to the rear end of this threaded hole. The shoulder joint spacer can be cut or extended according to the patient's needs, ensuring its flexibility and reliability.

[0031] In this invention, the first positioning blind hole and the second positioning blind hole are staggered, and the first support strip blind hole and the second support strip blind hole are also staggered. In this way, the metal support rod can be reliably supported in the center without affecting the support strength of the metal support rod. That is, if the positions of the first positioning blind hole and the second positioning blind hole overlap in the longitudinal direction, and the positions of the first support strip blind hole and the second support strip blind hole overlap in the longitudinal direction, the support strength at the overlapping position will inevitably be weakened.

[0032] The present invention, by setting a first positioning post, a buckle, a positioning hole and a buckle seat, makes its installation, positioning and disassembly convenient and reliable.

[0033] In summary, this invention has the advantages of simple structure, accurate and reliable positioning, convenient use, and flexibility, and has high practical and promotional value in the field of shoulder joint spacer manufacturing technology. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope of protection. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0036] Figure 2 This is a schematic diagram of the blasting process of the present invention.

[0037] Figure 3 This is a first cross-sectional schematic diagram of the lower mold box and the upper mold box in this invention.

[0038] Figure 4 This is a second cross-sectional schematic diagram of the lower mold box and the upper mold box in this invention.

[0039] Figure 5 This is a schematic diagram of the lower mold box in this invention.

[0040] Figure 6 This is a schematic diagram of the upper mold box in this invention.

[0041] Figure 7 This is a schematic diagram of the metal support rod at the first angle in this invention.

[0042] Figure 8 This is a schematic diagram of the second angle of the metal support rod in this invention.

[0043] Figure 9 This is a cross-sectional schematic diagram of the silicone molding and adjusting mold for intramedullary bone cement in this invention.

[0044] Figure 10 This is a schematic diagram of the ball head forming adjustment mold in this invention.

[0045] In the above figures, the component names corresponding to the reference numerals are as follows:

[0046] 1. Lower mold box; 2. Upper mold box; 3. Intramedullary bone cement silicone molding adjustment mold; 4. Ball head molding adjustment mold; 5. Metal support rod; 6. Sealing plug; 7. Metal rod; 10. Cutting groove; 11. First ball head molding adjustment mold mounting cavity; 12. First injection pipe; 13. First connecting common cavity; 14. First intramedullary bone cement silicone molding adjustment mold mounting cavity; 16. Buckle; 17. First positioning support column; 18. Second positioning support column; 19. First positioning column; 20. Extension port; 21. Second ball head molding adjustment mold 22. Second injection tube; 23. Second connecting common cavity; 24. Second intramedullary bone cement silicone molding adjustment mold installation cavity; 25. Third positioning support column; 26. Fourth positioning support column; 27. Positioning hole; 28. Snap-on seat; 31. First protrusion; 32. First side hole; 33. Second side hole; 41. Second protrusion; 51. Lower section rod; 52. Upper section rod; 53. First positioning blind hole; 54. Second positioning blind hole; 55. First support strip blind hole; 56. Second support strip blind hole; 57. Extended connecting threaded hole. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0048] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0049] The terms "first" and "second," etc., used in the specification and claims of this embodiment are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.

[0050] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0051] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0052] like Figures 1 to 10 As shown, this embodiment provides a mold for manufacturing a shoulder joint spacer, and casts the spacer to obtain it. The shoulder joint spacer mold mainly includes a lower mold box 1, an upper mold box 2, an intramedullary bone cement silicone molding and adjusting mold 3, a ball head molding and adjusting mold 4, a metal support rod 5, and a sealing plug 6. When an extended shoulder joint spacer is required, an extended metal rod 7 can be provided at the rear end of the metal support rod 5. The structure of the above components will now be described in detail:

[0053] Part 1, Lower Mold Box 1:

[0054] The lower mold box 1 has interconnected first ball-head forming adjustment mold mounting cavity 11, first connecting common cavity 13, and first intramedullary bone cement silicone molding adjustment mold mounting cavity 14. A second positioning support column 18 is provided at the connection between the first ball-head forming adjustment mold mounting cavity 11 and the first connecting common cavity 13, and a first positioning support column 17 is provided in the first intramedullary bone cement silicone molding adjustment mold mounting cavity 14. In this embodiment, the first ball-head forming adjustment mold mounting cavity 11 is a quarter-sphere, while the first intramedullary bone cement silicone molding adjustment mold mounting cavity 14 is a half-stepped hole or a conical hole. A half-section first injection pipe 12 is provided on the lower mold box 1, which communicates with the first connecting common cavity 13 to facilitate the entry of the poured material. At the same time, several first positioning columns 19 are provided on the lower mold box 1, and buckles 16 corresponding one-to-one with buckle seats 28 are provided on the lower mold box 1.

[0055] Part Two, Upper Mold Box 2:

[0056] The upper mold box 2 has interconnected second ball-head molding adjustment mold mounting cavity 21, second connecting common cavity 23, and second intramedullary bone cement silicone molding adjustment mold mounting cavity 24. The second ball-head molding adjustment mold mounting cavity 21 is identical to the first ball-head molding adjustment mold mounting cavity 11, and the second intramedullary bone cement silicone molding adjustment mold mounting cavity 24 is identical to the first intramedullary bone cement silicone molding adjustment mold mounting cavity 14. Here, the intramedullary bone cement silicone molding adjustment mold 3 is fitted into the first intramedullary bone cement silicone molding adjustment mold mounting cavity 14 and the second intramedullary bone cement silicone molding adjustment mold mounting cavity 24, and the ball-head molding adjustment mold 4 is fitted into the first ball-head molding adjustment mold mounting cavity 11 and the second ball-head molding adjustment mold mounting cavity 21. A second injection pipe 22 is provided on the upper mold box 2. The first injection pipe 12 and the second injection pipe 22 together form the pouring port. After the pouring material enters, the pouring port is sealed using a sealing plug 6.

[0057] Meanwhile, a third positioning support column 25 and a fourth positioning support column 26 are provided inside the upper mold box 2. The third positioning support column 25 is staggered from the first positioning support column 17, and the fourth positioning support column 26 is staggered from the second positioning support column 18, so as to ensure the support strength of the metal support rod 5 and the reliability of its centered placement.

[0058] In this embodiment, to ensure reliable cutting and extension of the shoulder joint spacer, several cutting grooves 10 are provided at the rear ends of the lower mold box 1 and the upper mold box 2, an extension opening 20 is provided at the rear ends of the lower mold box 1 and the upper mold box 2, and an extension connection threaded hole 57 is provided at the rear end of the metal support rod 5. When a shoulder joint spacer shorter than the length of the intramedullary bone cement silicone molding adjustment mold 3 plus the ball head molding adjustment mold 4 is required, it can be cut using the cutting grooves 10. If a shoulder joint spacer longer than the length of the intramedullary bone cement silicone molding adjustment mold 3 plus the ball head molding adjustment mold 4 is required, a metal rod is extended from the rear end of the metal support rod 5, and the metal rod is threadedly connected to the extension connection threaded hole 57. Subsequently, the area where the metal rod is located can be cast.

[0059] Similarly, the upper mold box 2 is provided with positioning holes 27 corresponding to the first positioning post 19, and the upper mold box 2 is provided with buckle seats 28 corresponding to the buckles 16 around its perimeter, so that the lower mold box 1 and the upper mold box 2 can be closed and connected conveniently and reliably.

[0060] Part Three, Intramedullary Bone Cement Silicone Molding Adjustment Mold 3:

[0061] The intramedullary bone cement silicone molding and adjusting mold 3 has a first side hole 32 and a second side hole 33. A first positioning support column 17 passes through the first side hole 32, and a third positioning support column 25 passes through the second side hole 33. Additionally, several first protrusions 31 are provided on the inner wall of the intramedullary bone cement silicone molding and adjusting mold 3, forming evenly distributed application grooves after pouring. After pouring, the intramedullary bone cement silicone molding and adjusting mold 3 can be cut open.

[0062] Part Four, Ball Head Forming Adjustment Mold 4:

[0063] The ball-head forming adjustment mold 4 is placed in the first ball-head forming adjustment mold mounting cavity 11 and the second ball-head forming adjustment mold mounting cavity 21. Several second protrusions 41 are evenly arranged inside the ball-head forming adjustment mold 4. Similar to the intramedullary bone cement silicone forming adjustment mold 3, a ball-head forming adjustment mold 4 with an inner diameter corresponding to the patient's required size is selected. This embodiment has several sets of intramedullary bone cement silicone forming adjustment molds 3 and ball-head forming adjustment molds 4, and each set of intramedullary bone cement silicone forming adjustment molds 3 and ball-head forming adjustment molds 4 has the same outer diameter, while the inner diameter is set according to the patient's required size.

[0064] Part 5, Metal Support Rod 5:

[0065] The metal support rod 5 can be divided into a lower section 51 and an upper section 52. A second positioning blind hole 54 and a second support strip blind hole 56 are formed in the lower part of the metal support rod 5, and a first positioning blind hole 53 and a first support strip blind hole 55 are formed in the upper part of the metal support rod 5. The second positioning blind hole 54 and the first positioning blind hole 53 are located on the lower section 51, and the second support strip blind hole 56 and the first support strip blind hole 55 are located on the upper section 52. The second positioning blind hole 54 and the first positioning blind hole 53 are staggered, and the second support strip blind hole 56 and the first support strip blind hole 55 are also staggered. The first positioning support column 17 passes through the second side hole 33 and is pressed into the second positioning blind hole 54, and the third positioning support column 25 passes through the first side hole 32 and is pressed into the first positioning blind hole 53. Meanwhile, the end of the second positioning support column 18 is placed inside the second support strip blind hole 56, and the end of the fourth positioning support column 26 is placed inside the first support strip blind hole 55. In this way, the metal support rod 5 can always be centered, ensuring the support strength of the shoulder joint spacer after casting.

[0066] The following is a brief explanation of the process of using this mold to cast a shoulder joint spacer:

[0067] First, the rear end of the metal support rod 5 is placed into the intramedullary bone cement silicone molding adjustment mold 3, with the second positioning blind hole 54 and the second support strip blind hole 56 facing the lower mold box 1, so as to facilitate positioning and connection with the first positioning support column 17 and the second positioning support column 18.

[0068] Then, the metal support rod 5 and the intramedullary bone cement silicone molding adjustment mold 3 are fitted into the lower mold box 1; at this time, the first positioning support column 17 passes through the intramedullary bone cement silicone molding adjustment mold 3 and is fitted into the second positioning blind hole 54, and the second positioning support column 18 is placed in the second support strip blind hole 56.

[0069] Place the ball head forming adjustment mold 4 into the lower mold box 1; this step can also be performed before the metal support rod 5 and the intramedullary bone cement silicone forming adjustment mold 3 are placed into the lower mold box 1, as long as the metal support rod 5 is centered in the intramedullary bone cement silicone forming adjustment mold 3 and the ball head forming adjustment mold 4.

[0070] Then close the mold box 2, and press the third positioning support column 25 and the fourth positioning support column 26 against the upper part of the metal support rod 5. Specifically, the third positioning support column 25 passes through the first side hole 32 and is pressed into the first positioning blind hole 53, while the end of the fourth positioning support column 26 is placed in the first support strip blind hole 55. In this way, the metal support rod 5 can be ensured to be centered and will not shift or displace during the casting process, thus ensuring the quality of the shoulder joint spacer casting.

[0071] Material is injected through the pouring gate and sealed using the sealing plug 6; or, if an extension is required, the extended metal rod can be connected to the metal support rod 5 before pouring.

[0072] After the material solidifies, open the upper mold box 2, remove the ball head molding adjustment mold 4, and cut open the intramedullary bone cement silicone molding adjustment mold 3 to obtain the shoulder joint spacer.

[0073] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes made based on the design principles of the present invention, or any non-creative modifications made thereon, shall fall within the scope of protection of the present invention.

Claims

1. A mold for manufacturing a shoulder joint spacer, and for casting the shoulder joint spacer, characterized in that, The system includes a lower mold box (1) and an upper mold box (2) that are connected by a snap-fit ​​mechanism; an intramedullary bone cement silicone molding adjustment mold (3) and a ball head molding adjustment mold (4) fitted inside the lower mold box (1) and the upper mold box (2); a pouring port set on the lower mold box (1) and the upper mold box (2) and used to inject materials into the lower mold box (1), the upper mold box (2), the intramedullary bone cement silicone molding adjustment mold (3) and the ball head molding adjustment mold (4); a sealing plug (6) placed inside the pouring port; a first positioning support column (17) and a second positioning support column (18) placed inside the lower mold box (1); a third positioning support column (25) and a fourth positioning support column (26) placed inside the upper mold box (2); and an intramedullary bone cement silicone molding adjustment mold. A metal support rod (5) is located on the axis of the intramedullary bone cement silicone molding adjustment mold (3) and the ball head molding adjustment mold (4) and is supported by a first positioning support column (17), a second positioning support column (18), a third positioning support column (25) and a fourth positioning support column (26); several first protrusions (31) are uniformly arranged inside the intramedullary bone cement silicone molding adjustment mold (3); several second protrusions (41) are uniformly arranged inside the ball head molding adjustment mold (4); the first positioning support column (17) and the third positioning support column (25) are arranged through the intramedullary bone cement silicone molding adjustment mold (3) and are pressed on the metal support rod (5); both the intramedullary bone cement silicone molding adjustment mold (3) and the ball head molding adjustment mold (4) are circumferentially closed structures; The lower part of the metal support rod (5) is provided with a second positioning blind hole (54) and a second support strip blind hole (56); the upper part of the metal support rod (5) is provided with a first positioning blind hole (53) and a first support strip blind hole (55); the first positioning support column (17) is provided through the intramedullary bone cement silicone molding adjustment mold (3) and is sleeved and connected to the second positioning blind hole (54); the third positioning support column (25) is provided through the intramedullary bone cement silicone molding adjustment mold (3) and is sleeved and connected to the first positioning blind hole (53); the end of the second positioning support column (18) is placed in the second support strip blind hole (56), and the end of the fourth positioning support column (26) is placed in the first support strip blind hole (55).

2. The mold for manufacturing a shoulder joint spacer according to claim 1, characterized in that, The first positioning blind hole (53) and the second positioning blind hole (54) are arranged in a staggered manner, and the first support strip blind hole (55) and the second support strip blind hole (56) are arranged in a staggered manner.

3. The mold for manufacturing a shoulder joint spacer according to claim 1, characterized in that, The lower mold box (1) and the upper mold box (2) have several cutting grooves (10) at their rear ends; the cutting grooves (10) are located at the rear end of the intramedullary bone cement silicone molding adjustment mold (3).

4. The mold for manufacturing a shoulder joint spacer according to claim 1, characterized in that, The lower mold box (1) and the upper mold box (2) are provided with an extension opening (20) at their rear ends; the metal support rod (5) is provided with an extension connection threaded hole (57) at its rear end.

5. A mold for manufacturing a shoulder joint spacer according to any one of claims 1 to 4, characterized in that, The lower mold box (1) has a first ball-head molding adjustment mold installation cavity (11), a first connecting common cavity (13), and a first intramedullary bone cement silicone molding adjustment mold installation cavity (14) that are interconnected. The upper mold box (2) has a second ball-head molding adjustment mold installation cavity (21), a second connecting common cavity (23), and a second intramedullary bone cement silicone molding adjustment mold installation cavity (24) that are interconnected. The intramedullary bone cement silicone molding adjustment mold (3) is fitted inside the first intramedullary bone cement silicone molding adjustment mold installation cavity (14) and the second intramedullary bone cement silicone molding adjustment mold installation cavity (24). The ball-head molding adjustment mold (4) is fitted inside the first ball-head molding adjustment mold installation cavity (11) and the second ball-head molding adjustment mold installation cavity (21). The pouring port is connected to the first connecting common cavity (13) and the second connecting common cavity (23).

6. A mold for manufacturing a shoulder joint spacer according to any one of claims 1 to 4, characterized in that, The lower mold box (1) is provided with several first positioning posts (19); the upper mold box (2) is provided with positioning holes (27) corresponding to the first positioning posts (19); the upper mold box (2) is provided with several buckle seats (28) around its perimeter; the lower mold box (1) is provided with buckles (16) corresponding to the buckle seats (28).

7. A mold for manufacturing a shoulder joint spacer according to any one of claims 1 to 4, characterized in that, The lower mold box (1) is provided with a first injection pipe (12); the upper mold box (2) is provided with a second injection pipe (22); the first injection pipe (12) and the second injection pipe (22) together form the pouring port.

8. A mold for manufacturing a shoulder joint spacer according to any one of claims 1 to 4, characterized in that, The intramedullary bone cement silicone molding adjustment mold (3) is provided with a first side hole (32) and a second side hole (33); the first positioning support column (17) is provided through the first side hole (32), and the third positioning support column (25) is provided through the second side hole (33).

9. A method for preparing a shoulder joint spacer, characterized in that, The shoulder joint spacer mold according to any one of claims 1 to 8 is used for casting; the method for preparing the shoulder joint spacer includes the following steps: The rear end of the metal support rod (5) is placed into the intramedullary bone cement silicone molding adjustment mold (3), and the second positioning blind hole (54) and the second support strip blind hole (56) face the lower mold box (1). The metal support rod (5) and the intramedullary bone cement silicone molding adjustment mold (3) are fitted into the lower mold box (1). The first positioning support column (17) passes through the intramedullary bone cement silicone molding adjustment mold (3) and is fitted into the second positioning blind hole (54). The second positioning support column (18) is placed in the second support strip blind hole (56). Place the ball head forming adjustment mold (4) into the lower mold box (1); Close the mold box (2) and press the third positioning support column (25) and the fourth positioning support column (26) against the upper part of the metal support rod (5); Material is injected from the pouring gate and sealed using a sealing plug (6); After the material solidifies, open the upper mold box (2) and remove the ball head forming adjustment mold (4). Cut open the silicone molding adjustment mold for intramedullary bone cement (3) to obtain the shoulder joint spacer.

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