Silica gel mold for producing ceramic unicompartmental knee joint femoral condyle and manufacturing method of silica gel mold

Abstract

The invention provides a silica gel mold for producing a ceramic unicompartmental knee joint femoral condyle and a manufacturing method of the silica gel mold, and relates to the technical field of ceramic unicompartmental knee joint femoral condyle manufacturing. According to the silica gel mold for producing the ceramic unicondylar knee joint femoral condyle and the manufacturing method of the silica gel mold, the upper mold, the lower mold, the forming block, the connecting block and the arc block are designed, the manufacturing process is easy to operate and complete in process, meanwhile, a 3D printed product is demolded, the precision requirement of the cavity size is better guaranteed, various curing agents are added in the manufacturing process, and the manufacturing cost is reduced. The method has the advantages that metering and proportioning are guaranteed, various reaction times are fully controlled, a silica gel mold manufactured under various optimal conditions has the advantages of being good in abrasion resistance, fine in simulation and the like, the ceramic unicompartmental knee joint femoral condyle is directly formed through the mold, machining is not needed, raw materials are saved, manufacturing cost is reduced, production efficiency is improved, batch production is achieved through the mold, and production cost is reduced. The precision and tolerance of a machining machine do not need to be considered, the consistency can be greatly guaranteed, and the precision and tolerance of products are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic unicondylar knee joint femoral condyle manufacturing, in particular to a silicone mold for manufacturing ceramic unicondylar knee joint femoral condyle and a manufacturing method thereof. Background Art

[0002] Femoral ankle fractures are mostly caused by direct violence, such as comminuted fractures of the femoral ankle caused by direct violent blows. Femoral ankle fractures mainly occur in young athletes and elderly people with osteoporosis, and are divided into four types: unicompartmental, bicompartmental, comminuted, and complex. Among them, unicompartmental knee replacement is a new minimally invasive surgery relative to total knee replacement. It only replaces the diseased part and performs surface replacement on the medial or lateral compartment of the knee joint to replace the damaged cartilage surface of the knee joint. It is called the "tooth filling" technology in knee replacement. This technology does not require the removal of the anterior and posterior cruciate ligaments, and retains the proprioception and joint function of the knee joint.

[0003] At present, the unicompartmental knee femoral condyle used for replacement is mostly made of ceramic unicompartmental knee femoral condyle. The molding process of the ceramic unicompartmental knee femoral condyle is mostly completed by using a whole block of square material through processing equipment such as CNC or precision carving. The processing efficiency is low, the raw material consumption is large, the manufacturing cost is high, and because the precision of the machine tool itself has tolerances, the processing consistency cannot be guaranteed during mass production. In order to solve this problem, a silicone mold for producing ceramic unicompartmental knee femoral condyle and a manufacturing method thereof are proposed.

[0004] To this end, we have developed a new silicone mold and its manufacturing method for producing ceramic unicompartmental knee femoral condyle. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a silicone mold for producing a ceramic unicompartmental knee femoral condyle and a manufacturing method thereof, which solves the problem that the molding process of the ceramic unicompartmental knee femoral condyle in the prior art is mostly a whole block of square material, which is processed by CNC or precision carving processing equipment, has low processing efficiency, high raw material consumption, and high manufacturing cost. In addition, since the precision of the machine tool itself has tolerances, the processing consistency cannot be guaranteed during mass production.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a silicone mold for producing a ceramic unicompartmental knee joint femoral condyle and a manufacturing method thereof, comprising a lower mold and an upper mold, the lower mold and the upper mold are matched and installed, a connecting component for producing a ceramic unicompartmental knee joint femoral condyle is arranged between the lower mold and the upper mold, the top of the lower mold is provided with an opening, the inner side wall of the opening is fixedly connected to a molding block, a first connecting hole is provided on the surface of the molding block, and a second connecting hole is provided on the surface of the molding block close to the first connecting hole;

[0009] A connecting block is fixedly connected to the surface of the upper mold, an arc groove is opened on the surface of the connecting block, an arc block is fixedly connected inside the arc groove, a first connecting column is fixedly connected to one side of the surface of the arc block, and a second connecting column is fixedly connected to the side of the surface of the arc block close to the first connecting column.

[0010] Preferably, the connecting assembly includes a plurality of positioning holes and a plurality of positioning columns, the plurality of positioning holes are opened on the surface of the lower mold, and the plurality of positioning holes are located outside the openings, the plurality of positioning columns are fixedly connected to the surface of the upper mold, and the plurality of positioning columns are installed inside the plurality of positioning holes.

[0011] Through the above technical solution, the positioning column is installed inside the positioning hole, so that the upper mold and the lower mold are tightly fitted, which is very convenient.

[0012] Preferably, a feeding hole is provided at the top of the upper die, and a feeding plug is installed inside the feeding hole.

[0013] Through the above technical solution, it is convenient to seal the feeding hole filled with ceramic powder using a feeding plug.

[0014] Preferably, the outer surface of the connecting block is mounted to the inner side wall of the opening, and the arc block is mounted in cooperation with the forming block.

[0015] The above technical solution facilitates the direct formation of an inner cavity-molded ceramic unicompartmental knee joint femoral condyle.

[0016] Preferably, the outer surface of the first connecting column is mounted to the inside of the first connecting hole, and the outer surface of the second connecting column is mounted to the inside of the second connecting hole.

[0017] Through the above technical solution, the first connecting column and the second connecting column can be quickly installed with the first connecting hole and the second connecting hole.

[0018] Preferably, the depth of the second connecting hole is smaller than the depth of the first connecting hole, and the length of the second connecting column is smaller than the length of the first connecting column.

[0019] Preferably, the lower mold and the upper mold are both made of stainless steel, and the outer surface of the forming block and the inner wall of the arc block are both smoothed.

[0020] Through the above technical solution, the stainless steel material is more durable and has a longer service life. After smoothing, the ceramic unicompartmental knee joint femoral condyle is guaranteed to be flatter and more precise after demolding.

[0021] A method for producing a silicone mold for producing a ceramic unicompartmental knee joint femoral condyle comprises the following specific steps:

[0022] Step 1: Wash and dry the master mold and 3D printed product, and make it smooth;

[0023] Step 2: Pour 500-1000 grams of silica gel into a mixing container for later use, add the curing agent into the mixing container at a 1:1 ratio, and stir thoroughly;

[0024] Step 3: Add silica gel diluent until it is completely mixed for 5-10 minutes, and then drain the bubbles under negative pressure for 1-3 minutes;

[0025] Step 4: Apply release agent on the surface of the mold and 3D product, pour the evenly mixed silicone into the mold, cover the mold and press it tightly, let it stand for 10-16 hours, and after it is completely cured, remove the mother mold and the 3D product to get the silicone mold.

[0026] (III) Beneficial effects

[0027] The present invention provides a silicone mold for producing a ceramic unicompartmental knee joint femoral condyle and a manufacturing method thereof, which has the following beneficial effects:

[0028] The silicone mold for producing ceramic unicompartmental knee joint femoral condyle and the manufacturing method thereof have the advantages of simple manufacturing process and complete process by designing an upper mold, a lower mold, a molding block, a connecting block and an arc block, and at the same time, a 3D printed product is used for demoulding, which better guarantees the precision requirement of the cavity size, and various curing agents are added during the manufacturing process to ensure the metering ratio and fully control various reaction times. The silicone mold manufactured under various optimal conditions has the advantages of good wear resistance, fine simulation, etc. Furthermore, the ceramic unicompartmental knee joint femoral condyle is directly molded by the mold without processing, thus saving raw materials, reducing manufacturing costs, and improving production efficiency. The mold is mass-produced without considering the precision and tolerance of the processing machine itself, which can greatly guarantee consistency, ensure the precision and tolerance of the product, and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an appearance diagram of the silicone mold of the present invention;

[0030] Figure 2It is a schematic diagram of the internal structure of the lower mold of the present invention;

[0031] Figure 3 It is a schematic diagram of the upper mold structure of the present invention.

[0032] Among them, 1. lower mold; 2. upper mold; 21. positioning column; 3. feeding plug; 4. opening; 5. first connecting hole; 6. forming block; 7. second connecting hole; 8. arc block; 9. first connecting column; 10. second connecting column; 11. positioning hole; 12. connecting block. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Examples, such as Figure 1 - Figure 3 As shown, an embodiment of the present invention provides a silicone mold for producing a ceramic unicompartmental knee joint femoral condyle and a manufacturing method thereof, comprising a lower mold 1 and an upper mold 2, the lower mold 1 and the upper mold 2 are matched and installed, a connecting component for producing a ceramic unicompartmental knee joint femoral condyle is arranged between the lower mold 1 and the upper mold 2, an opening 4 is arranged on the top of the lower mold 1, a molding block 6 is fixedly connected to the inner side wall of the opening 4, a first connecting hole 5 is opened on the surface of the molding block 6, and a second connecting hole 7 is opened on the surface of the molding block 6 close to the first connecting hole 5;

[0035] A connecting block 12 is fixedly connected to the surface of the upper mold 2, and an arc groove is provided on the surface of the connecting block 12. An arc block 8 is fixedly connected inside the arc groove. A first connecting column 9 is fixedly connected to one side of the surface of the arc block 8, and a second connecting column 10 is fixedly connected to one side of the surface of the arc block 8 close to the first connecting column 9. A feeding hole is provided on the top of the upper mold 2, and a feeding plug 3 is installed inside the feeding hole to facilitate sealing the feeding hole filled with ceramic powder using the feeding plug 3. The lower mold 1 and the upper mold 2 are both made of stainless steel, and the outer surface of the molding block 6 and the inner wall of the arc block 8 are smoothed. Made of stainless steel, it is more durable and has a longer service life. After smoothing, it is ensured that the ceramic unicompartmental knee femoral condyle is smoother and has higher precision after demolding.

[0036] like Figure 2 and Figure 3As shown, the connecting component includes a plurality of positioning holes 11 and a plurality of positioning columns 21, the plurality of positioning holes 11 are opened on the surface of the lower mold 1, and the plurality of positioning holes 11 are located on the outside of the opening 4, the plurality of positioning columns 21 are fixedly connected to the surface of the upper mold 2, the plurality of positioning columns 21 are installed to the inside of the plurality of positioning holes 11, and the positioning columns 21 are installed to the inside of the positioning holes 11, so that the upper mold 2 and the lower mold 1 are tightly fitted, which is very convenient, the outer surface of the connecting block 12 is installed to the inner wall of the opening 4, the arc block 8 and the forming block 6 are installed in cooperation, so as to form an inner cavity forming ceramic unicompartmental knee joint femoral condyle, the outer surface of the first connecting column 9 is installed to the inside of the first connecting hole 5, and the outer surface of the second connecting column 10 is installed to the inside of the second connecting hole 7, so as to facilitate the first connecting column 9 and the second connecting column 10 to be quickly installed with the first connecting hole 5 and the second connecting hole 7, the depth of the second connecting hole 7 is less than the depth of the first connecting hole 5, and the length of the second connecting column 10 is less than the length of the first connecting column 9.

[0037] When the above-mentioned silicone mold is in use, the upper mold 2 is connected to the lower mold 1, and is installed to the inside of the positioning hole 11 through the positioning column 21, so that the upper mold 2 and the lower mold 1 are tightly fitted, and then ceramic powder is filled through the feeding hole to allow the ceramic powder to enter the cavity, and the feeding plug 3 is plugged in. The connection between the upper mold 2 and the lower mold 1 is sealed with a waterproof tape, and placed in a high-pressure device for pressurization treatment. The ceramic unicompartmental knee joint femoral condyle can be directly formed without processing, saving raw materials, reducing manufacturing costs, and improving production efficiency. The mold is mass-produced without considering the accuracy and tolerance of the processing machine itself, which can greatly ensure consistency and ensure the accuracy and tolerance of the product.

[0038] A method for producing a silicone mold for producing a ceramic unicompartmental knee joint femoral condyle comprises the following specific steps:

[0039] Step 1: Wash and dry the master mold and the 3D printed product (ceramic unicompartmental knee femoral condyle), and make it smooth;

[0040] Step 2: Pour 500-1000 grams of silica gel into a mixing container for later use, add the curing agent into the mixing container at a 1:1 ratio, and stir thoroughly;

[0041] Step 3: Add silica gel diluent until it is completely mixed for 5-10 minutes, and then drain the bubbles under negative pressure for 1-3 minutes;

[0042] Step 4: Apply release agent on the surface of the mold and 3D product, pour the evenly mixed silicone into the mold, cover the mold and press it tightly, let it stand for 10-16 hours, and after it is completely cured, remove the mother mold and the 3D product to get the silicone mold.

[0043] In summary, the present invention designs the upper mold 1, the lower mold 2, the molding block 6, the connecting block 12 and the arc block 8, and the manufacturing process of the overall silicone mold is simple to operate and the process is complete. At the same time, there is a 3D printed product for demolding, which better guarantees the accuracy requirements of the cavity size, and various curing agents are added during the manufacturing process to ensure the metering ratio and fully control various reaction times. The silicone mold manufactured under the optimal conditions has the advantages of good wear resistance and fine simulation. Furthermore, the ceramic unicompartmental knee joint femoral condyle is directly molded by the mold without processing, saving raw materials, reducing manufacturing costs, and improving production efficiency. The mold is mass-produced without considering the accuracy and tolerance of the processing machine itself, which can greatly ensure consistency, ensure the accuracy and tolerance of the product, and is more practical.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicone mold for producing a ceramic unicompartmental knee joint femoral condyle, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) and the upper mold (2) are mounted in a matching manner, a connection component for producing a ceramic unicompartmental knee joint femoral condyle is arranged between the lower mold (1) and the upper mold (2), an opening (4) is arranged at the top of the lower mold (1), a molding block (6) is fixedly connected to the inner side wall of the opening (4), a first connection hole (5) is arranged on the surface of the molding block (6), and a second connection hole (7) is arranged on the surface of the molding block (6) close to the first connection hole (5); A connecting block (12) is fixedly connected to the surface of the upper mold (2), an arc groove is provided on the surface of the connecting block (12), an arc block (8) is fixedly connected inside the arc groove, a first connecting column (9) is fixedly connected to one side of the surface of the arc block (8), and a second connecting column (10) is fixedly connected to one side of the surface of the arc block (8) close to the first connecting column (9).

2. A silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 1, characterized in that: The connection assembly comprises a plurality of positioning holes (11) and a plurality of positioning columns (21); the plurality of positioning holes (11) are opened on the surface of the lower mold (1), and the plurality of positioning holes (11) are located outside the opening (4); the plurality of positioning columns (21) are fixedly connected to the surface of the upper mold (2), and the plurality of positioning columns (21) are installed inside the plurality of positioning holes (11).

3. A silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 2, characterized in that: A feeding hole is provided at the top of the upper die (2), and a feeding plug (3) is installed inside the feeding hole.

4. The silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 3, characterized in that: The outer surface of the connecting block (12) is mounted to the inner wall of the opening (4), and the arc block (8) is mounted in cooperation with the forming block (6).

5. The silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 4, characterized in that: The outer surface of the first connecting column (9) is mounted inside the first connecting hole (5), and the outer surface of the second connecting column (10) is mounted inside the second connecting hole (7).

6. The silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 5, characterized in that: The depth of the second connection hole (7) is smaller than the depth of the first connection hole (5), and the length of the second connection column (10) is smaller than the length of the first connection column (9).

7. The silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to claim 6, characterized in that: The lower mold (1) and the upper mold (2) are both made of stainless steel, and the outer surface of the forming block (6) and the inner wall of the arc block (8) are both smoothed.

8. A method for making a silicone mold for producing a ceramic unicondylar knee joint femoral condyle according to any one of claims 1 to 7, characterized in that: The specific steps include: Step 1: Wash and dry the master mold and 3D printed product, and make it smooth; Step 2: Pour 500-1000 grams of silica gel into a mixing container for later use, add the curing agent into the mixing container at a 1:1 ratio, and stir thoroughly; Step 3: Add silica gel diluent until it is completely mixed for 5-10 minutes, and then drain the bubbles under negative pressure for 1-3 minutes; Step 4: Apply release agent on the surface of the mold and 3D product, pour the evenly mixed silicone into the mold, cover the mold and press it tightly, let it stand for 10-16 hours, and after it is completely cured, remove the mother mold and the 3D product to get the silicone mold.

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