KR-20260067640-A - Method of manufacturing prosthetic hand

Abstract

A method for manufacturing a prosthetic hand is disclosed. The method for manufacturing a prosthetic hand comprises: a) a step of measuring the skin tone of the user of the prosthetic hand; b) a step of producing a wound mold (10) that replicates the shape of the user's wound by applying a mold material to the surface of the user's wound to which the prosthetic hand is to be fitted and then curing it; c) a step of producing a hand mold (20) that replicates the shape of the user's hand by applying a mold material to the surface of the hand opposite to the user's wound and then curing it; d) a step of scanning the user's upper body to check the length of both of the user's arms; e) a step of preparing a plaster paste by mixing plaster powder; f) a step of producing a wound master model (30) and a hand master model (40) by pouring the plaster paste into the wound mold (10) and the hand mold (20) and then hardening it; g) a step of obtaining 3D hand model data and 3D wound model data by 3D scanning the wound master model (30) and the hand master model (40). h) a step of obtaining 3D prosthetic hand model data by combining the above 3D hand model data and the above 3D affected area model data; i) a step of producing a prosthetic hand master model (50) by 3D printing the shape of the prosthetic hand according to the above prosthetic hand model data; j) a step of producing a prosthetic hand body mold (60) having a skin replication surface inside which the user's skin surface is replicated by applying a mold material to the surface of the prosthetic hand master model (50) and curing it; k) a step of producing and preparing a fingernail using transparent acrylic; l) a step of producing and preparing a skin solid silicone lump and a plurality of skin solid silicone sheets having a color similar to the user's skin tone; m) a step of forming a part of the skin solid silicone lump into a fingertip shape, attaching a fingernail to the upper surface of the fingertip shape, inserting the skin solid silicone lump with the attached fingernail into the inner end of the finger of the above prosthetic hand body mold (60) to fix it so as to be attached to the skin replication surface, and filling the inside of the finger of the above prosthetic hand body mold (60) with the skin solid silicone lump; n) a step of attaching the skin solid silicone sheet to the skin replica surface so as to be connected to the skin solid silicone filled in the fingers of the prosthetic hand body mold (60); o) a step of fitting the prosthetic hand body mold (60) into the affected area master model (30) so that the skin solid silicone sheet attached to the skin replica surface of the prosthetic hand body mold (60) comes into contact with the surface of the affected area master model (30); p) a step of placing the affected area master model (30) and the prosthetic hand body mold (60) fitted therein into an oven and baking for a certain period of time to produce the prosthetic hand body outer shape (70); and q) a step of separating the prosthetic hand body outer shape (70) from the prosthetic hand body mold (60); characterized by including these steps.

Inventors

• 김정현
• 유주복

Assignees

• 주식회사 핸더바이오닉스

Dates

Publication Date

20260513

Application Date

20241106

Claims (2)

1. a) A step of measuring the skin tone of the prosthetic arm user; b) a step of applying a mold material to the surface of the user's affected area to be fitted with a prosthetic arm, and then curing it to produce a mold (10) that replicates the shape of the user's affected area; c) a step of applying a mold material to the surface of the hand opposite to the user's affected area and curing it to produce a hand mold (20) that replicates the shape of the user's hand; d) A step of scanning the user's upper body to check the length of both of the user's arms; e) A step of preparing the plaster mixture by mixing the plaster powder; f) a step of pouring plaster mixture into the wound mold (10) and the hand mold (20) and then hardening it to produce a wound master model (30) and a hand master model (40); g) a step of 3D scanning the above-mentioned affected area master model (30) and the above-mentioned hand master model (40) to obtain 3D hand model data and 3D affected area model data; h) A step of obtaining 3D prosthetic hand model data by combining the above 3D hand model data and the above 3D affected area model data; i) a step of producing a prosthetic hand master model (50) by 3D printing the shape of the prosthetic hand according to the above prosthetic hand model data; j) A step of applying a mold material to the surface of a prosthetic hand master model (50) and curing it to produce a prosthetic hand body mold (60) having a skin replication surface inside which the user's skin surface is replicated; k) A step of preparing nails by making them using clear acrylic; l) A step of preparing a skin solid silicone lump and a plurality of skin solid silicone sheets having a color similar to the user's skin tone; m) A step of forming a portion of the skin solid silicone lump into a fingertip shape, attaching a fingernail to the upper surface of the fingertip shape, inserting the skin solid silicone lump with the attached fingernail into the inner end of the finger of the prosthetic hand body mold (60) and fixing it so as to be attached to the skin replica surface, and filling the inside of the finger of the prosthetic hand body mold (60) with the skin solid silicone lump; n) A step of attaching the skin solid silicone sheet to the skin replica surface so as to be connected to the skin solid silicone filled in the finger of the prosthetic hand body mold (60); o) A step of fitting the prosthetic body mold (60) into the affected area master model (30) so that the skin solid silicone sheet attached to the skin replica surface of the prosthetic body mold (60) comes into contact with the surface of the affected area master model (30); p) a step of placing the above-mentioned affected area master model (30) and the above-mentioned prosthetic body mold (60) fitted thereon into an oven and baking for a certain period of time to produce the prosthetic body outer shape (70); and q) a step of separating the prosthetic body outer shape (70) from the prosthetic body mold (60); comprising, Method for manufacturing a prosthetic hand.
2. In paragraph 1, r) A step of coloring the surface of the prosthetic body exterior (70) with a light red coloring agent so that a part of the surface of the prosthetic body exterior (70) reveals a light red color similar to blood color; s) A step of placing the prosthetic body outer shape (70) into an oven and baking it for a certain period of time so that the coloring agent hardens; t) a step of taking the prosthetic body shape (70) out of the oven and, while comparing it with the user's hand, additionally coloring the prosthetic body shape (70) with a coloring agent to make it closer to the user's skin tone; and u) a step of placing the prosthetic body outer shape (70) into an oven and baking it for a certain period of time to cure the additionally colored coloring material; further comprising, Method for manufacturing a prosthetic hand.

Description

Method of manufacturing prosthetic hand The present invention relates to a method for manufacturing a prosthetic hand, and more specifically, to a method for manufacturing a prosthetic hand using silicone. The development of prosthetic hands is driven by the need to restore basic functions and quality of life for individuals who have lost their hands or were born without them. Early prosthetic hands are rudimentary forms made of materials such as wood, iron, or leather, but they are evolving significantly by integrating robotics, artificial intelligence, and advanced materials like carbon fiber. For example, bionic hands are designed to perform complex movements, such as individually moving fingers, using microprocessors that interpret muscle signals from the user's body. However, these advanced prosthetic hands are expensive and difficult to manufacture. Consequently, recently, prosthetic hands are being manufactured using 3D printing or silicone. Since 3D printing often uses synthetic resin materials, heat damage and surface contamination may occur. Silicone, on the other hand, is widely used for manufacturing prosthetic hands because it is highly durable, flexible, resistant to extreme temperatures, and biocompatible. When manufacturing prosthetic arms using silicone, the casting mold plays an important role. Generally, plastic or metal molds are used for the casting mold. Plastic frames are lightweight yet strong and suitable for making the exterior of a prosthetic hand. However, plastic frames have the disadvantage that it is difficult to make complex shapes and the material's properties may deteriorate if heat is applied repeatedly. Metal frames offer the advantage of high durability. However, they have the disadvantages of high manufacturing costs and potential inconvenience during work due to their heavy weight. In particular, plastic and metal frames have limitations in creating a prosthetic limb appearance similar to the user's skin. FIG. 1 is a flowchart showing the sequence of a method for manufacturing a prosthetic hand according to one embodiment of the present invention. Figure 2 is a diagram showing the measurement of a prosthetic hand user's skin tone. Figure 3 is a drawing showing the process of making a mold for the affected area. Figure 4 is a drawing showing the process of making a hand mold. Figure 5 is a diagram showing the scanning of the user's upper body. Figure 6 is a drawing showing the preparation of plaster mixture. Figure 7 is a drawing showing the plaster mixture being poured into a wound mold or a hand mold. Figure 8 is a drawing showing the appearance of the affected area master model and the hand master model. Figure 9 is a drawing showing the 3D scanning of a hand master model. Figure 10 is a drawing showing the 3D scanning of a master model of the affected area. Figure 11 is a diagram showing the combination of 3D hand model data and 3D affected area model data. Figure 12 is a drawing showing the process of creating a master model of a prosthetic arm by 3D printing. Figure 13 is a drawing showing the process of manufacturing a mold for the main body of a prosthetic hand. Figure 14 is a drawing showing the appearance of a manufactured fingernail. Figure 15 is a drawing showing the appearance of a skin solid silicone lump. Figure 16 is a drawing showing the appearance of a skin solid silicone sheet. Figure 17 is a drawing showing a fingernail attached to a skin solid silicone bundle. Figure 18 shows a solid silicone lump of skin with a fingernail attached being inserted into the finger of a prosthetic hand body mold. Figure 19 is a drawing showing the attachment of a skin solid silicone sheet to the skin replica surface of the prosthetic hand body mold. Figure 20 is a drawing showing the prosthetic body mold with a skin solid silicone sheet attached being fitted into a master model of the affected area. Figure 21 is a drawing showing the master model of the affected area and the mold of the prosthetic body fitted thereto being placed in an oven and baked. Figure 22 is a drawing showing the external appearance of the main body of the prosthetic arm. Figure 23 is a drawing showing the surface of the prosthetic arm body being colored. Figure 24 is a drawing showing the additional coloring of the surface of the prosthetic arm body. Hereinafter, a method for manufacturing a prosthetic hand according to an embodiment of the present invention will be described in detail with reference to the attached drawings. Since the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been us