Manufacturing method of high-simulation fascia

Abstract

The invention discloses a manufacturing method of a high-simulation fascia, which belongs to the technical field of human body medicine and animal teaching models, and comprises the following steps of: manufacturing a mold by overturning the mold, manufacturing a gel coat, closing the mold, pouring, opening the mold and trimming. According to the method, a real specimen is directly used as a model seed for model turning and copying, so that the problem of form distortion is avoided; materials used for injection molding are silicon rubber and white glass fibers or polypropylene fibers, the texture of the silicon rubber is similar to the hardness of a real specimen, and the fibers are arranged in longitudinal rows and embedded in the silicon rubber and are very similar to a real specimen in the aspect of anatomical observation; according to the invention, a real object specimen can be copied in form, and the texture and tissue structure are close to those of the real object specimen.

Description

Technical Field

[0001] The invention relates to the technical field of human medicine and animal teaching models, and in particular to a method for making a high-simulation fascia. Background Art

[0002] Fascia is a type of connective tissue that wraps around muscles, muscle groups, and organs. It plays an important role in support, stability, and movement. The fascia model in human and animal medical education is a tool used in teaching and research to help students and researchers better understand the structure, function, and distribution of fascia in the human or animal body.

[0003] Most of the existing human medicine and animal teaching fascia models are sculpted out of the mold based on the real specimen or atlas, and then the mold is reproduced. This method often has the problem of distortion in shape when sculpting the mold; one of the materials such as gypsum, resin, PVC, etc. is often used as the injection molding material during injection molding. These materials are relatively hard in texture, while the real specimens are relatively soft compared with them; the fibers in the fascia of the real specimens are irregularly arranged, and the path of the fiber bundles can be seen by anatomical observation, while the existing models only carve out textures similar to their path on the surface, which is too distorted compared with the real specimens. In short, the fascia in the existing human medicine and animal teaching models has the disadvantages of distortion in shape, texture, and tissue structure compared with the fascia in the real specimens. Summary of the invention

[0004] In view of this, the present invention provides a method for making a highly simulated fascia to solve the problem that the existing fascia models of human medicine and animal teaching have distortions in the form, texture, and tissue structure of nerves.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: A method for making a high-simulation fascia, comprising the following steps: making a mold by turning over a mold, injecting a film, closing the mold, opening the mold and trimming; The injection molding comprises the following steps: (1) Use a brush to apply a thin layer of vaseline as a release agent on the inner surface of the mold; (2) According to the area of ​​the fascia on the specimen, use tweezers to take cotton wool or silk cotton for later use; (3) Take liquid silicone rubber and add silicone rubber curing agent, the ratio of silicone rubber curing agent to silicone rubber is 1:20-30; (4) Soak the spare absorbent cotton or silk cotton into the prepared liquid silicone rubber, and put the two together into a vacuum chamber to evacuate the air; (5) Place the soaked absorbent cotton or silk cotton in the corresponding position on the inner surface of the mold according to the fiber distribution in the specimen to complete the injection molding.

[0006] Wherein, in the step (4), the vacuum degree of the vacuum pumping is between -0.08 and -0.1 MPa, and the time is 30-60 seconds.

[0007] Wherein, the film turning mold making process comprises the following steps: (1) Select a human or animal specimen containing nerves after dissection and place it on a plate larger than the specimen, with the long axis of the specimen parallel to the plate; (2) Fill the lower half of the specimen with plasticine until it reaches the level of the specimen's midline. The filled midline level should be 5 cm greater than the specimen's edge. (3) Apply a thin layer of vaseline on the surface of the specimen not covered by the plasticine and on the horizontal surface of the plasticine; (4) Weigh the liquid silicone rubber and add silicone rubber curing agent into it. The ratio of silicone rubber curing agent to silicone rubber is 1:15-25; put the prepared liquid silicone rubber into a vacuum chamber and evacuate it; (5) Apply liquid silicone rubber to the horizontal surface of the specimen and the plasticine; (6) After the liquid silicone rubber solidifies, cover its surface with gauze; (7) Repeat step (4); (8) Apply liquid silicone rubber on gauze; after the liquid silicone rubber solidifies, apply a thin layer of vaseline on its surface; (9) Prepare FRP resin: Take epoxy resin and add epoxy resin curing agent; (10) Apply the prepared FRP resin to the surface of the cured silicone rubber coat. When the FRP resin has been formed but not completely cured, cover the surface with FRP cloth; (11) Repeat step (9); (12) Apply the prepared FRP resin to the surface of the FRP cloth and leave it for 10-14 hours to allow it to fully cure; (13) After the FRP resin is completely cured, half of the mold is completed; (14) Turn over the mold halves, the specimen, the plasticine, and the flat plate underneath so that the flat plate is at the top instead of the bottom. Remove the flat plate and the plasticine to expose the specimen. (15) Making the other half of the mold, the making method and steps are the same as steps (3) to (13); (16) After the FRP resin is completely cured, separate the upper and lower parts of the mold and take out the specimen; (17) Use an electric drill to drill a hole at the mold joint. This hole will serve as the pouring port. Use scissors and an angle grinder to trim the mold. The mold is now complete.

[0008] Wherein, the physical specimen is an immersion specimen or a plasticized specimen.

[0009] Wherein, in the step (4), the vacuum degree of the vacuum pumping is between -0.08 and -0.1 MPa, and the time is between 30 and 60 seconds.

[0010] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: (1) The present invention directly uses the real specimen as a mold for replication, thus avoiding the problem of morphological distortion; the materials used for injection molding are silicone rubber and flax fiber or glass fiber. The texture of silicone rubber is similar to the hardness of the real specimen. The flax fiber or glass fiber is arranged in longitudinal rows and embedded in the silicone rubber, which is very similar to the real specimen in terms of anatomical observation.

[0011] (2) Compared with the real specimens, the model produced by the present invention has the advantages of being easy to preserve, non-toxic, tasteless, low cost, and no restrictions on the raw materials required for production, which is conducive to the popularization of the product and more convenient for school teachers and students to use. Compared with ordinary models, it is closer to the real specimen in terms of morphological structure, texture hardness, tissue composition, etc., avoiding the disadvantages of ordinary models being distorted, so that students will not suffer cognitive bias due to the distortion of the reference model when learning relevant knowledge, which is more conducive to the teaching of human medicine and animal related knowledge. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a picture of the high-simulation fascia finished product made in Example 1 of the present invention. DETAILED DESCRIPTION

[0013] The following embodiments are provided for a better understanding of the present invention, but are not limited to the best mode of implementation, and do not limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention.

[0014] In the following examples, the silicone rubber curing agent was purchased from Hangzhou Jessica Chemical Co., Ltd. with a brand name of ND22; the epoxy resin curing agent was purchased from Jinan Chenghao Chemical Co., Ltd. with a brand name of T31. Example 1

[0015] This embodiment provides a method for making a high-simulation fascia, comprising the following steps: making a mold by turning the mold, injecting the film, closing the mold, opening the mold and trimming; Wherein, the film turning mold making process comprises the following steps: (1) Select a human or animal specimen containing nerves that has been dissected and place it on a plate that is larger than the specimen, with the long axis of the specimen parallel to the plate surface; (2) Fill the lower half of the specimen with plasticine until it reaches the level of the specimen's midline. The filled midline level should be 5 cm greater than the specimen's edge. (3) Apply a thin layer of vaseline on the surface of the specimen not covered by the plasticine and on the horizontal surface of the plasticine; (4) Weigh the liquid silicone rubber and add silicone rubber curing agent into it, the ratio of silicone rubber curing agent to silicone rubber is 1:20; put the prepared liquid silicone rubber into a vacuum chamber and evacuate the vacuum; the vacuum degree of evacuation is -0.09MPa, and the time is 45s; (5) Apply liquid silicone rubber to the horizontal surface of the specimen and the plasticine; (6) After the liquid silicone rubber solidifies, cover its surface with gauze; (7) Repeat step (4); (8) Apply liquid silicone rubber on gauze; after the liquid silicone rubber solidifies, apply a thin layer of vaseline on its surface; (9) Prepare FRP resin: Take epoxy resin and add epoxy resin curing agent; (10) Apply the prepared FRP resin to the surface of the cured silicone rubber coat. When the FRP resin has been formed but not completely cured, cover the surface with FRP cloth; (11) Repeat step (9); (12) Apply the prepared FRP resin to the surface of the FRP cloth and leave it for 10-14 hours to allow it to fully cure; (13) After the FRP resin is completely cured, half of the mold is completed; (14) Turn over the mold halves, the specimen, the plasticine, and the flat plate underneath so that the flat plate is at the top instead of the bottom. Remove the flat plate and the plasticine to expose the specimen. (15) Making the other half of the mold, the making method and steps are the same as steps (3) to (13); (16) After the FRP resin is completely cured, separate the upper and lower parts of the mold and take out the specimen; (17) Use an electric drill to drill a hole at the mold joint. This hole will serve as the pouring port. Use scissors and an angle grinder to trim the mold. The mold is now complete.

[0016] The injection molding comprises the following steps: (1) Use a brush to apply a thin layer of vaseline as a release agent on the inner surface of the mold; (2) According to the area of ​​the fascia on the specimen, use tweezers to take the absorbent cotton for later use; (3) Take liquid silicone rubber and add silicone rubber curing agent, the ratio of silicone rubber curing agent to silicone rubber is 1:25; (4) Dip the spare absorbent cotton into the prepared liquid silicone rubber, and put the two together into a vacuum chamber to evacuate the air; (5) Place the soaked absorbent cotton in the corresponding position on the inner surface of the mold according to the fiber path of the specimen to complete the injection molding. Example 2

[0017] This embodiment provides a method for making a high-simulation fascia, comprising the following steps: making a mold by turning the mold, injecting the film, closing the mold, opening the mold and trimming; Wherein, the film turning mold making process comprises the following steps: (1) Select a human or animal specimen containing nerves that has been dissected and placed on a flat plate that is larger than the specimen, with the long axis of the specimen parallel to the plate surface; (2) Fill the lower half of the specimen with plasticine until it reaches the level of the specimen's midline. The filled midline level should be 5 cm greater than the specimen's edge. (3) Apply a thin layer of vaseline on the surface of the specimen not covered by the plasticine and on the horizontal surface of the plasticine; (4) Weigh the liquid silicone rubber and add silicone rubber curing agent into it, the ratio of silicone rubber curing agent to silicone rubber is 1:15; put the prepared liquid silicone rubber into a vacuum chamber and evacuate the vacuum; the vacuum degree of evacuation is -0.08MPa, and the time is 60s; (5) Apply liquid silicone rubber to the horizontal surface of the specimen and the plasticine; (6) After the liquid silicone rubber solidifies, cover its surface with gauze; (7) Repeat step (4); (8) Apply liquid silicone rubber on gauze; after the liquid silicone rubber solidifies, apply a thin layer of vaseline on its surface; (9) Prepare FRP resin: Take epoxy resin and add epoxy resin curing agent; (10) Apply the prepared FRP resin to the surface of the cured silicone rubber coat. When the FRP resin has been formed but not completely cured, cover the surface with FRP cloth; (11) Repeat step (9); (12) Apply the prepared FRP resin to the surface of the FRP cloth and leave it for 10-14 hours to allow it to fully cure; (13) After the FRP resin is completely cured, half of the mold is completed; (14) Turn over the mold halves, the specimen, the plasticine, and the flat plate underneath so that the flat plate is at the top instead of the bottom. Remove the flat plate and the plasticine to expose the specimen. (15) Making the other half of the mold, the making method and steps are the same as steps (3) to (13); (16) After the FRP resin is completely cured, separate the upper and lower parts of the mold and take out the specimen; (17) Use an electric drill to drill a hole at the mold joint. This hole will serve as the pouring port. Use scissors and an angle grinder to trim the mold. The mold is now complete.

[0018] The injection molding comprises the following steps: (1) Use a brush to apply a thin layer of vaseline as a release agent on the inner surface of the mold; (2) According to the area of ​​the fascia on the specimen, use tweezers to take the silk cotton for later use; (3) Take liquid silicone rubber and add silicone rubber curing agent, the ratio of silicone rubber curing agent to silicone rubber is 1:20-30; (4) Immerse the spare silk cotton into the prepared liquid silicone rubber, and put the two together into a vacuum chamber to evacuate the air; (5) The impregnated silk cotton is spread in the corresponding position on the inner surface of the mold according to the fiber layout of the specimen to complete the injection molding. Example 3

[0019] This embodiment provides a method for making a high-simulation fascia, comprising the following steps: making a mold by turning the mold, injecting the film, closing the mold, opening the mold and trimming; Wherein, the film turning mold making process comprises the following steps: (1) Select a human or animal specimen containing nerves that has been dissected and place it on a plate that is larger than the specimen, with the long axis of the specimen parallel to the plate surface; (2) Fill the lower half of the specimen with plasticine until it reaches the level of the specimen's midline. The filled midline level should be 5 cm greater than the specimen's edge. (3) Apply a thin layer of vaseline on the surface of the specimen not covered by the plasticine and on the horizontal surface of the plasticine; (4) Weigh the liquid silicone rubber and add silicone rubber curing agent into it, the ratio of silicone rubber curing agent to silicone rubber is 1:25; put the prepared liquid silicone rubber into a vacuum chamber and evacuate it; the vacuum degree of evacuation is -0.1MPa, and the time is 60s; (5) Apply liquid silicone rubber to the horizontal surface of the specimen and the plasticine; (6) After the liquid silicone rubber solidifies, cover its surface with gauze; (7) Repeat step (4); (8) Apply liquid silicone rubber on gauze; after the liquid silicone rubber solidifies, apply a thin layer of vaseline on its surface; (9) Prepare FRP resin: Take epoxy resin and add epoxy resin curing agent; (10) Apply the prepared FRP resin to the surface of the cured silicone rubber coat. When the FRP resin has been formed but not completely cured, cover the surface with FRP cloth; (11) Repeat step (9); (12) Apply the prepared FRP resin to the surface of the FRP cloth and leave it for 10-14 hours to allow it to fully cure; (13) After the FRP resin is completely cured, half of the mold is completed; (14) Turn over the mold halves, the specimen, the plasticine, and the flat plate underneath so that the flat plate is at the top instead of the bottom. Remove the flat plate and the plasticine to expose the specimen. (15) Making the other half of the mold, the making method and steps are the same as steps (3) to (13); (16) After the FRP resin is completely cured, separate the upper and lower parts of the mold and take out the specimen; (17) Use an electric drill to drill a hole at the mold joint. This hole will serve as the pouring port. Use scissors and an angle grinder to trim the mold. The mold is now complete.

[0020] The injection molding comprises the following steps: (1) Use a brush to apply a thin layer of vaseline as a release agent on the inner surface of the mold; (2) According to the area of ​​the fascia on the specimen, use tweezers to take the absorbent cotton for later use; (3) Take liquid silicone rubber and add silicone rubber curing agent, the ratio of silicone rubber curing agent to silicone rubber is 1:20-30; (4) Dip the spare absorbent cotton into the prepared liquid silicone rubber, and put the two together into a vacuum chamber to evacuate the air; (5) Place the soaked absorbent cotton in the corresponding position on the inner surface of the mold according to the fiber path of the specimen to complete the injection molding.

[0021] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The protection scope of the present invention is defined by the claims and their equivalent technical solutions.

Claims

1. A method for making a high-simulation fascia, characterized in that The process includes the following steps: mold making, film injection, mold closing, mold opening and trimming; The injection molding comprises the following steps: (1) Use a brush to apply a thin layer of vaseline as a release agent on the inner surface of the mold; (2) According to the area of ​​the fascia on the specimen, use tweezers to take cotton wool or silk cotton for later use; (3) Take liquid silicone rubber and add silicone rubber curing agent, the ratio of silicone rubber curing agent to silicone rubber is 1:20-30; (4) Soak the spare absorbent cotton or silk cotton into the prepared liquid silicone rubber, and put the two together into a vacuum chamber to evacuate the air; (5) Place the soaked absorbent cotton or silk cotton in the corresponding position on the inner surface of the mold according to the fiber distribution in the specimen to complete the injection molding.

2. The method for making a high-simulation fascia according to claim 1, characterized in that: In the step (4), the vacuum degree of the vacuum pumping is between -0.08 and -0.1 MPa, and the time is 30-60 seconds.

3. The method for making a high-simulation fascia according to claim 1, characterized in that: The film turning mold making method comprises the following steps: (1) Select a human or animal specimen containing nerves after dissection and place it on a plate larger than the specimen, with the long axis of the specimen parallel to the plate; (2) Fill the lower half of the specimen with plasticine until it reaches the level of the specimen's midline. The filled midline level should be 5 cm greater than the specimen's edge. (3) Apply a thin layer of vaseline on the surface of the specimen not covered by the plasticine and on the horizontal surface of the plasticine; (4) Weigh the liquid silicone rubber and add silicone rubber curing agent into it. The ratio of silicone rubber curing agent to silicone rubber is 1:15-25; put the prepared liquid silicone rubber into a vacuum chamber and evacuate it; (5) Apply liquid silicone rubber to the horizontal surface of the specimen and the plasticine; (6) After the liquid silicone rubber solidifies, cover its surface with gauze; (7) Repeat step (4); (8) Apply liquid silicone rubber on gauze; after the liquid silicone rubber solidifies, apply a thin layer of vaseline on its surface; (9) Prepare FRP resin: Take epoxy resin and add epoxy resin curing agent; (10) Apply the prepared FRP resin to the surface of the cured silicone rubber coat. When the FRP resin has been formed but not completely cured, cover the surface with FRP cloth; (11) Repeat step (9); (12) Apply the prepared FRP resin to the surface of the FRP cloth and leave it for 10-14 hours to allow it to fully cure; (13) After the FRP resin is completely cured, half of the mold is completed; (14) Turn over the mold halves, the specimen, the plasticine, and the flat plate underneath so that the flat plate is at the top instead of the bottom. Remove the flat plate and the plasticine to expose the specimen. (15) Making the other half of the mold, the making method and steps are the same as steps (3) to (13); (16) After the FRP resin is completely cured, separate the upper and lower parts of the mold and take out the specimen; (17) Use an electric drill to drill a hole at the mold joint. This hole will serve as the pouring port. Use scissors and an angle grinder to trim the mold. The mold is now complete.

4. The method for making a high-simulation fascia according to claim 1, characterized in that: The physical specimen is an immersion specimen or a plasticized specimen.

5. The method for making a high-simulation fascia according to claim 1, characterized in that: In the step (4), the vacuum degree of the vacuum pumping is between -0.08 and -0.1 MPa, and the time is 30-60 seconds.

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