KR20010092866A - A method of manufacturing of bodily auxiliary device - Google Patents

Abstract

PURPOSE: A method for manufacturing a body assistant apparatus is provided to produce a minute body assistant apparatus in large quantities in a short time by the progresses of hardening and annealing and to reduce the manufacturing cost by collecting and reusing the silicon undiluted solution for making the body assistant apparatus. CONSTITUTION: In the method for manufacturing the body assistant apparatus, many progresses are included. In the first progress, the silicon undiluted solution is injected. In the second progress, the first hardening is carried out for 30 seconds or 1 minute. In the third progress, cooling and removing are carried out. In the fourth progress, the second hardening is carried out in 40-60 deg.C for 5 or 15 minutes. In the fifth progress, the third hardening is carried out in 90-100 deg.C for 25 or 35 minutes. In the sixth progress, cooling and releasing are carried out and the hardened silicon body assistant apparatus is taken out from a cast. And after coloring and drying, the body assistant apparatus is completed.

Description

A manufacturing method of body assistive device {A METHOD OF MANUFACTURING OF BODILY AUXILIARY DEVICE}

The present invention relates to a method for manufacturing body assistive devices such as prosthetic and prosthetic limbs used by the physically handicapped for assisting the handicapped part, and in particular, precisely manufactured body assistive devices using silicone having a very similar texture to the body. In addition, the present invention relates to a method for improving the workability and manufacturing a body assist device very economically.

In general, the prosthetic and prosthetic limbs used to assist the handicapped part must be precisely shaped so that the visual and contact feelings are similar to the human body, and the Korean Patent Publication No. 71-282 (Dec. 23, 1971) In the conventional "prosthetic and prosthetic molding method" as disclosed, a model is obtained by applying a part of the body with silicone room temperatuere valcanizing (RTV) rubber, and in this model, polyazole, acrylic, poritylene, monomane and the like are obtained. The conductor is coated on the entire surface of the reversed model obtained by injecting a kind of the copper alloy, and the reversed model coated with the conductor is coated with copper or nickel by a known plating method to obtain a rolled mold, and then injected into the rolled mold. When the counter-molded model is removed by heating to a high temperature, a complete unitary mold is formed in the precursor mold. The PVC body hardened by injecting the PVC sol into the inside of the precursor mold and evenly applying it inside, and then turning the mold upside down to discharge the unnecessary PVC sol while heating the outside of the precursor mold to cure the PVC sol attached to the inside of the mold. You get an assistive device.

However, the inside of the mold is applied as shown in Figure 6a attached in the process of curing the PVC sol attached to the inside of the mold by heating the outside of the precursor mold while discharging unnecessary PVC sol after applying the inside of the precursor mold upside down The PVC sol flowing down becomes thicker toward the lower side (B), and the upper side (A) located inside the mold, i.e., the upper side (A), obtains the body assisting device (10) which becomes thinner.

Therefore, since the lower side (B) of the body assistive device 10 is thick and hard, irritation occurs in the skin when worn on the body, and there is a problem in that it is not easily rubbed and beautiful in appearance. In addition, the upper side (A) of the body assistive device (10) is thin, so that a lot of scratches on the molded product due to the protruding sharply shaped parts such as wrinkles of the hands, foot nodes, etc. formed inside the metal mold It is impossible to be molded by tearing, and there is a problem of being easily worn and broken during use. In addition, since the molding of the body assistive device 10 is performed in the air, the remaining amount of PVC sol applied to the inside after being filled in the first precursor mold and discharged from the mold is cured and cannot be reused and disposed of.

Patent Application No. 98-32822 (1998.8.13) filed by the present applicant to the Republic of Korea in order to solve the above problems "manufacture method and mold thereof" of the hand, foot, ear, face, etc. After molding the molded article having a long length, the mold is separated into upper and lower molds in order to facilitate demoulding of the assistive body formed from the mold, and the periphery of the inner molds disposed in the upper and lower molds The upper and lower molds are formed by attaching the divided upper and lower auxiliary molding members formed of urethane resin whose surface is replicated to maintain a space for forming a desired body thickness of the desired uniform thickness in the upper and lower molds. The silicone is injected into the space within the mold and cured to complete the body assistive device 10 as shown in FIG. 6B.

However, the body assisting device 1 formed through the divided upper and lower molds is separated from the mold after molding without damage, thereby improving productivity, and obtaining a body assisting device having a desired uniform thickness. It can reduce the loss of raw materials by preventing the loss of silicon, but if the number of times of use increases, the separation line (C) is formed by the boundary between the upper and lower mold molds, which lowers the value of the commodity and thus helps the upper and lower parts. There is an uneconomical problem of having to replace the molding member.

The present invention was devised to solve the conventional problems as described above, and an object of the present invention is to form a body aid using a pre-molded mold, the skin by uniformizing the skin thickness of the molded body aid without a seam Sophisticated body aids can be obtained that create the same image as that, and the hardening and slow cooling process allows you to obtain the finished body aids in a short time, thereby improving work efficiency and recovering and reusing the remaining amount of the silicon stock in use. It is to provide a method of manufacturing a very economical body assistive device that can reduce the cost through.

1 is a process chart of the process of manufacturing the body assistive device according to the present invention,

Figure 2 is a partially cutaway perspective view showing a state of injecting the silicon stock solution into the mold during the body assistive device manufacturing process according to the present invention,

3 is a partially cutaway perspective view showing a state in which the silicon stock solution injected into the mold during the manufacturing process of the body assisting device according to the present invention cures the epidermal part by primary heat;

Figure 4 is a perspective view showing a state of recovering the remaining amount of the silicon stock solution in the mold during the body assistive device manufacturing process according to the present invention,

5 is a perspective view showing a state to separate from the mold after completing the body assisting apparatus according to the present invention,

6A and 6B are cross-sectional and perspective views of a conventional body assistive device.

* Description of the symbols for the main parts of the drawings *

1: Jeonju mold 2: Silicon stock solution

3: hot water tank 10: body assistive device

The method of manufacturing the body assistive device of the present invention for achieving the above object, the operation at low temperature to extend the solidification time of the silicon stock solution, the material of the body assistive device and obtain a predetermined skin thickness and to recover and recycle And a primary curing step of easily immersing the precursor mold filled with silicon stock solution in hot water to obtain a desired thickness of the epidermis by heat conduction, and through a secondary and tertiary curing process to solidify and solidify the reaction. Comprising a step of obtaining a basic body assistive device, characterized in that it comprises a normal completion step of completing the body assistive device by coloring and drying the same color as the skin inside the basic body assistive device.

Hereinafter, with reference to the accompanying drawings will be described a method of manufacturing the body assistive device of the present invention.

2 is a perspective view showing a state in which the silicon stock solution 2 is filled in the precursor mold 1, wherein the precursor mold 1 is represented by prosthetics as an example, and is not limited thereto. Fingers, toes and ears are possible.

First, look at the manufacturing process of the prosthetic mold (1), evenly apply and cure a mixture of silicone RTV (Room Temperatuere Valcanizing) and a curing agent as the main material to the body of the hand part, and then cured, and then separated it from the body After the molding is obtained, paraffin is injected into the inner space of the silicone molding, and the paraffin molding is separated from the silicone molding after the paraffin molding is cured by inserting a ring with a connecting string into the paraffin before the paraffin is cured. . Subsequently, after coating a film using silver nitrate or the like on the paraffin molded product, copper or nickel plating is performed to produce a hollow electroform mold 1 having an open top, and heat is applied to the electroform mold 1 inside. When the filled paraffin is poured and removed by heating, a conventional rolled mold (1) having the surface of the body replicated is obtained.

The following describes the process of manufacturing the body aid of the present invention using the precursor (1).

As a preparatory step, by applying a thinner release material to the inside of the precursor mold (1) where the hand of the body is replicated by a conventional method, it is stored in a low temperature room, and the main material (using TSE3453 of Toshiba, Japan) and the hardening material are 10: 1. By mixing at a ratio of the silicon stock solution (2) by stirring and removing bubbles in a conventional vacuum device so as not to generate bubbles, and stored in the low temperature chamber, the water filled in a separate hot water tank (3) 90 ℃ ~ 100 ℃ It is heated to a high temperature of. The inside of the low temperature chamber is maintained at a temperature of −1 ° C. to 3 ° C. to extend the solidification time of the silicon stock solution 2 (normally, the working time at 25 ° C. at room temperature is within 2 hours). The temperature of the precursor die (1) and the silicon stock solution (2) stored in the low temperature chamber is maintained to be the same as the internal temperature of the low temperature tank.

In the next step, the silicon injection step may remove the precursor mold 1 and the silicon stock solution 2 stored in the low temperature chamber, and then open the silicon stock solution 2 into the inside of the precursor mold 1 as shown in FIG. It is preferable to fill up to a height of 2/3 to 4/5 lower than the position of 11) so that no bubbles are generated in the silicon stock solution 2 to be filled. The reason why the silicon stock solution 2 is not filled up to the upper end of the opening 11 of the roll mold 2 is that the skin in which the silicon stock solution 2 is in contact with the inner surface of the roll mold 1 by heat conduction in the first curing step described later is solidified. Solidified thinner than the thickness of the intended to be easy to wear after completion.

Subsequently, the primary curing step of heating the precursor mold 1 into which the silicon stock solution 2 is injected is an important process for obtaining a high quality body aid, and the precursor mold into which the silicon stock solution 2 is injected ( 1) is immersed in the hot water tank 3 to the position filled with the silicon stock solution (2). At this time, the temperature of the precursor mold 1 itself, which was maintained at a low temperature, was increased by the heat conduction transferred from the water heated from 90 ° C. to 100 ° C. of the hot water tank 3, and the silicon stock solution 2 in contact with the inside was heated. In this case, the silicon stock solution 2 that has received high temperature heat is solidified to obtain a predetermined skin thickness. If the skin thickness is submerged in the hot water tank 3 for about 1 minute, a thickness of about 1 mm to 1.5 mm can be obtained, and a desired skin thickness can be obtained while adding or subtracting the immersion time as necessary.

Meanwhile, in the process of solidifying the silicon stock solution 2 filled in the precursor mold 1 to the desired thickness of the epidermis by heat conduction in the state of being immersed in the hot water tank 3, as shown in FIG. The silicon stock solution 2 is inclined so as to bury the silicon stock solution 2 to the upper portion of the opening 11 so that the silicon stock solution 2 is thinly contacted with the inside of the opening 11 of the precursor mold 1 to solidify.

Subsequently, the precursor die 1 drawn out from the hot water tank 3 is quenched using ice water or cold water, and then the remaining amount of the silicon stock solution 2 which is not solidified in the low-temperature chamber is transferred from the precursor die 1 as shown in FIG. 4. Perform a silicon collection step of pouring and recovering for about 5-15 minutes. The reason why the precursor die 1 is quenched and collected in the low temperature chamber is to stop the change of the solidified process of the unsolidified silicon stock solution 2 filled inside the precursor mold 1 as well as the silicon stock solution 2 is rolled. It is for extending the solidification time so that it can be easily taken out and collected from the inside of the mold 1. In addition, the collection of the remaining amount of silicon (2) is preferably collected completely by adjusting the degree of inclination and the vertical state in accordance with the shape of the mold, the collected silicon stock solution (2) can be reused in subsequent processes without discarding. Will be stored in the storage room.

Next, as the secondary curing step, even after removing the remaining amount of the silicon stock solution (2), since the trace amount of the silicon stock solution (2) remains inside the solidified skin, the unsolidified silicon stock solution (2) is 40 ℃ ~ It is dried for about 10 to 20 minutes at a temperature of 60 ℃ to dry in the reaction state. The secondary curing step is an intermediate step of completely curing, and is a drying process in which the first solidified epidermis and the silicon stock solution 2 buried inside the epidermis can obtain the same color while preventing discoloration due to rapid temperature change.

Tertiary curing step of completely drying the skin of the reaction solidified state inside the precursor mold 1 at a high temperature of 90 ° C. to 100 ° C. by using an indirect or direct hot air dryer (not shown). Will be performed.

In addition, as soon as the epidermis inside the precursor mold 1 is completely dried, the manufacturing process of the present invention is completed through a demoulding step in which the basic body assistive device 10 is removed from the precursor mold 1 after being cooled slowly at room temperature.

Since the process of completing the basic body assistive device 10 is performed within a total of 1 hour to obtain the effect of shortening the long time required for more than 24 hours of the conventional natural drying, as well as the desired part to wear on the body It can be molded to a thin thickness.

On the other hand, the basic body assistive device 10 demolded from the electroforming mold (1) is inverted by a conventional method, the same color as the skin inside the color, and after drying, if desired reversed to the original state is completed The manufacture of the hand assistive device 10 of the hand is complete.

As described above, in the body, a preferred embodiment of the present invention for a method for manufacturing a body assistive device of the hand has been described, but this is only an example, but not limited to the manufacture of all the assistive device of the body, which It will be limited by the scope of the appended claims.

The present invention solidifies the silicone stock solution filled in the electroforming mold by heat conduction, but by uniformizing the thickness of the solidified epidermis, the color to be colored inside is uniformly transmitted to the outside, thereby creating a seamless image. The equipment can be obtained, and the complete body assisting device can be obtained within a short time through the hardening and slow cooling process, thereby improving work efficiency and reducing the cost by recovering and reusing the remaining amount of the silicone stock in use. It is

Claims (2)

In the method for manufacturing body assistive devices such as prosthetic and prosthetic limbs, using a roll mold obtained by replicating a desired body part by a conventional method, A) applying a release material on the inner surface of the precursor mold and keeping the same at -1 ° C to 3 ° C in a low temperature room; B) mixing the main material of the silicone resin and the cured material in a weight ratio of 10: 1 and stirring the silicon stock solution so as not to generate bubbles in the low temperature chamber to maintain and store at -1 ° C to 3 ° C; C) a silicon injection step of removing the precursor mold and the silicon stock solution from the low temperature chamber, and filling the silicon stock solution to the height of 2/3 to 4/5 into the precursor mold; D) Place the precursor mold into which the silicon stock solution is injected into the hot water tank, apply hot water to the hot water tank to the height filled with the silicon stock solution, and rotate the mold while tilting to apply the silicon stock solution to the top end of the precursor mold. Primary curing step of solidifying the silicon stock solution in contact with the inside of the precursor mold to a predetermined skin thickness while maintaining for 30 seconds to 1 minute; E) taking the precursor mold out of the hot water tank and quenching the liquid and then pouring the remaining amount of the unsolidified silicon stock solution from the precursor mold; F) a secondary curing step of maintaining, drying and curing the precursor die at a temperature of 40 ° C. to 60 ° C. for 5 to 15 minutes; G) a third curing step of maintaining, drying and curing the precursor die at a high temperature of 90 ° C. to 100 ° C. for 25 to 35 minutes; A) a demoulding step of slowly cooling the precursor mold to room temperature and taking out a body aid made of silicone material cured from the precursor mold; And I) The method of manufacturing a body assisting device comprising the step of applying a colorant of the same color as the skin and drying the body assistive device in a conventional manner inside the demolded basic body assistive device. The method of claim 1, Method for producing a body assistive device characterized in that the silicon stock solution recovered in step e) is put into a low temperature room and recycled.