TWI769826B - Hand leather and method of making the same - Google Patents

Abstract

A manufacturing method of hand skin, comprising the following steps: providing an inner mold core in the shape of a human hand, and the inner mold core has a plurality of fingers. The inner mold core is covered with silicone material for many times. The silicone material is covered with a plaster bandage and the inner mold core is taken out to obtain a hollow outer mold in the shape of a human hand. A first hand leather material is prepared and poured into the inner surface of the outer mold corresponding to the fingernails and knuckles of the human hand. A second hand leather material is prepared and poured into the outer mold; the outer mold is removed and a glove with the first hand leather material and the second hand leather material is taken out. A sock is sleeved on the inner mold core, and the sock is coated with a silicone material. A third-hand leather material is prepared and poured into the glove, and the inner mold core is put into the glove. The inner mold core is taken out, and the glove is combined with the third-hand leather material and the sock to obtain a first-hand leather.

Description

Hand leather and method of making the same

The present invention relates to a manufacturing method, in particular to a hand leather and a manufacturing method thereof.

Prosthetic limbs are an indispensable and important life aid for people with physical disabilities. In order to make the appearance of prosthetic limbs similar to human limbs, a layer of skin covering the surface of human limbs is usually placed on the surface of movable prosthetic limbs. , the main function is to make the use of prosthetic limbs difficult for other people to directly perceive the effect of prosthetic limbs. The covering used for the prosthetic hand is called the hand skin. At present, due to the consideration of ductility and durability, the hardness of the existing hand leather is relatively soft, which leads to insufficient overall structural support, so that the appearance will appear collapsed, and the visual effect will not be realistic enough, and there is still room for improvement.

Therefore, one of the objectives of the present invention is to provide a method for manufacturing a hand leather that can solve at least one of the aforementioned problems.

Therefore, another object of the present invention is to provide a hand leather that can solve at least one of the aforementioned problems.

The manufacturing method of the hand skin of the present invention comprises the following steps: providing an inner mold core in the shape of a human hand, the inner mold core having a plurality of fingers; covering the inner mold core with a silicone material for many times; covering the silicone material with a gypsum bandage And take out the inner mold core to obtain a hollow outer mold in the shape of a human hand, the outer mold has an inner surface, the inner surface has a plurality of nail parts and a plurality of knuckle parts, the nail parts and the The finger joints correspond to the fingernails and the finger joints of the human hand respectively; a first-hand leather material is prepared and poured into the fingernails and the finger joints on the inner surface of the outer mold; a second-hand leather is prepared material and pour it into the outer mold; remove the outer mold and take out a glove with the first hand leather material and the second hand leather material; sleeve a sock on the inner mold core, and use silicone material Coating on the sock; deploying a third-hand leather material and pouring it into the glove, and putting the inner mold into the glove; and taking out the inner mold to make the glove and the third-hand leather The material and the sock are combined to form a hand hide.

In some embodiments, the step of providing the inner mold core includes the following sub-steps: providing a hollow inner mold in the shape of a human hand; covering the inner mold with a plaster bandage; preparing a polystyrene glue and a plaster to form a first a material; the polyvinyl gum and a hardener are formulated into a second material; and the first material and the second material are poured into the inner mold to obtain the inner mold core.

In some embodiments, in the step of preparing the first material, the weight ratio of the polyvinyl gum to the gypsum is 10:3, and the polyvinyl gum and the gypsum are mixed and then evacuated, and the first material is evacuated. And the second material is poured into the inner mold at the same time.

In some embodiments, in the step of preparing the second material, the weight ratio of the polyvinyl gum to the hardener is 20:1, and the first material and the second material are poured into the inner mold at the same time .

In some embodiments, a step after the outer mold is obtained, the step is to apply polyvinyl gum on the outer mold for multiple times.

In some embodiments, it also includes a step after coating the polystyrene, and the step is to coat the glass fiber on the outermost polyvinyl of the outer mold for multiple times.

In some embodiments, it also includes a step of cleaning the skin of the hand, grinding the edges of the skin of the hand, and repairing the holes of the skin of the hand.

In some embodiments, a step after repairing the skin of the hand is also included, and the step is to allow the skin of the hand to stand for at least 24 hours.

In some embodiments, a step after repairing the skin of the hand is also included, and the step is to heat the skin of the hand to between 40 and 60 degrees for at least 12 hours.

In some embodiments, in the step of splicing the sock cover, the fingers of the inner mold core are first coated with a silicone material, then the sock cover is sleeved on the inner mold core, and finally the silicone material is applied Apply to the socks.

The hand leather of the present invention includes an inner layer, the inner layer is hollow in the shape of a hand, and includes a sock cover and a body covering the sock cover; an outer layer, covering the outer surface of the inner layer; and a decoration unit, arranged on On the outer surface of the outer layer, the decoration unit includes a plurality of nail parts and a plurality of finger joint parts.

In some embodiments, the body of the inner layer, the outer layer and the decoration unit are all made of silicone.

The present invention has at least the following effects: because the hand skin is obtained by combining the glove with the third hand skin material and the sock cover, the sock cover can increase the supporting force of the overall structure of the hand skin, improve the structural strength and make the appearance unfavorable. It will be collapsed, and the visual effect will be more realistic.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

Referring to FIGS. 1 to 4 , an embodiment of the method for manufacturing a hand leather of the present invention is suitable for manufacturing a hand leather 10 as a covering covering the surface of a prosthetic hand (not shown). The manufacturing method of the hand leather 10 includes the following steps S1 to S13.

In step S1 , a hand-shaped inner mold core 4 is provided first. The inner mold core 4 is shaped like a human hand and has a palm 41 and five fingers 42 . Specifically, this step S1 includes the following sub-steps: first, a hollow hand-shaped inner mold is provided by 3D printing, and then the inner mold is covered with a plaster bandage. Next, a first material is prepared with a polystyrene glue and a gypsum, and the first material is vacuumed, and then the polyvinyl glue and a hardener are prepared into a second material, and finally the first material is prepared. and the second material are poured into the inner mold at the same time to obtain the inner mold core 4 . Wherein, the weight ratio of the styrofoam and the gypsum is 10:3, and the weight ratio of the styrofoam and the hardener is 20:1. And after the inner mold core 4 is taken out, the inner mold core 4 will be repaired, and the appearance of the inner mold core 4 will be repaired.

In step S2, the inner mold core 4 is covered with silicone material for many times. Specifically, the full-covering operation is performed with silicone material three times in total, but it is not limited by this. Then proceed to step S3, wrap the silicone material with a plaster bandage and take out the inner mold core 4 to obtain a hollow outer mold 5 in the shape of a hand, the outer mold 5 has an inner surface 51, and the inner surface 51 has A plurality of nail parts 511 and a plurality of knuckle parts 512 are provided, and the nail parts 511 and the knuckle parts 512 correspond to the nails and the knuckles of a human hand, respectively. Next, steps S4 and S5 are performed to reinforce the outer mold 5 . In step S4 , polyflor is coated on the outer mold 5 for several times. Specifically, the number of times of coating is four, but not limited thereto. In step S5, the glass fiber is wrapped on the outermost layer of polyvinyl of the outer mold 5 for several times. Specifically, the number of coverings is four times, but not limited thereto. It takes about 20 to 30 minutes for each operation, and the coating can be reinforced again depending on the situation. Finally, depending on the situation, a finger covering mold can be locked on the outer mold 5 corresponding to the finger to prevent it from breaking.

In step S6 , a first hand leather material is prepared and poured into the nail parts 511 and the knuckle parts 512 of the inner surface 51 of the outer mold 5 . Specifically, the inner surface 51 of the outer mold 5 will be marked on the inner surface 51 of the outer mold 5 corresponding to the crescent of the fingernail of the human hand with an oil-based ballpoint pen, and left for at least one day. Next, the first-hand skin materials corresponding to the nails and the crescent are prepared respectively. The nail pieces are made of red silicone and general silicone materials in a weight ratio of 10:1. In fact, the ratio of 1g to 0.1g is used. The crescent part is made of gray-white silica gel and general silica gel raw materials in a weight ratio of 10:1. In fact, it is between 0.5g and 0.05g~0.1g. The knuckle part is made of dark silicone and general silicone materials in a weight ratio of 10:1. In fact, the ratio is between 0.5g and 0.05g~0.1g. After the preparation is completed, the first hand leather material is poured into the nail parts 511 and the finger joint parts 512 of the inner surface 51 of the outer mold 5 with thin tubes respectively.

In step S7 , a second hand leather material is prepared and poured into the outer mold 5 . Specifically, the second-hand leather material is prepared from skin color silicone and general silicone materials in a weight ratio of 10:1, and after the second-hand leather material is poured into the outer mold 5, the outer mold is then shaken 5. Make the second hand leather material flow evenly on the inner surface 51 of the outer mold 5, remove particles and adjust the thickness of the second hand leather material.

In step S8, the outer mold 5 is removed and a glove with the first hand leather material and the second hand leather material is taken out. Specifically, the glove is a semi-finished product, and the fingers of the glove and the burrs at the opening will be removed after being taken out.

In step S9, a sock 11 is sleeved on the inner mold core 4, and the sock 11 is coated with a silicone material. Specifically, the silicone material is first coated on the five fingers 42 of the inner mold core 4 , then the sock 11 is sleeved on the inner mold core 4 , and finally the silicone material is coated on the outer surface of the socks 11 . Next, in step S10, a third hand leather material is prepared and poured into the glove, and the inner mold core 4 and the sock cover 11 are put into the glove. Specifically, the third-hand leather material is prepared from skin color silicone and general silicone materials in a weight ratio of 10:1, and the inner mold core 4 is set into the glove, and then the tightness with the glove is adjusted to make The third hand leather material can cover the sock cover 11 and be combined with the sock cover 11 . Next, in step S11 , the inner mold core 4 is taken out, and the glove is combined with the third hand leather material and the sock cover 11 to obtain a first hand leather 10 . It should be noted that, by coating the silicone material on the socks cover 11, the socks cover 11 can be more easily adsorbed to the third hand leather material.

Next, in step S12 , the hand leather 10 is cleaned, the burrs of the hand leather 10 are ground, and the holes of the hand leather 10 are repaired. The last step is step 13, where the hand skin 10 is allowed to stand for at least 24 hours, and the manufacturing method of the hand skin 10 of the present invention is completed. In other embodiments, the hand skin 10 can also be heated to a temperature between 40 and 60 degrees and maintained for at least 12 hours, which is not limited by this embodiment.

Referring to FIG. 4 and FIG. 5 , the hand leather 10 of the present invention includes an inner layer 1 , an outer layer 2 and a decoration unit 3 . The inner layer 1 is hollow and hand-shaped, and includes a sock 11 and a body 12 covering the sock 11 . The main body 12 is hardened from the aforementioned third-hand leather material. The outer layer 2 covers the outer surface of the inner layer 1 , and the outer layer 2 is hardened from the aforementioned second hand leather material. The decoration unit 3 is arranged on the outer surface of the outer layer 2 and is hardened from the aforementioned first hand leather material. The decoration unit 3 includes a plurality of nail parts 31 and a plurality of finger joint parts 32 , each nail part 31 has the aforementioned nail pieces and crescents, and the finger joint parts 32 correspond to the aforementioned finger joint parts.

To sum up, the manufacturing method of the hand leather 10 of the present invention is obtained by combining the hand leather 10 with the glove, the third hand leather material and the sock cover, and the socks cover 11 can increase the overall structure of the hand leather 10 . The supporting force is improved, the structural strength is improved, the appearance is not collapsed, and the visual effect is more realistic, so it can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

10: Hand Leather

1: inner layer

11: socks

12: Ontology

2: Outer layer

3: Decorative unit

31: Nails

32: Knuckles

4: inner mold kernel

41: palm

42: Fingers

5: Outer mold

51: inner surface

511: Nails

512: Knuckles

S1~S13: Steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: 1 is a flow chart of an embodiment of a method for manufacturing a hand leather of the present invention; Fig. 2 is a schematic plan view of an inner mold core of this embodiment; 3 is a schematic plan view of an outer mold of this embodiment; 4 is a schematic plan view of an embodiment of the hand leather of the present invention; and FIG. 5 is a schematic cross-sectional view of the embodiment of the hand leather of the present invention.

S1~S13: Steps

Claims (12)

A method for manufacturing a hand skin, comprising the following steps: providing an inner mold core in the shape of a human hand, the inner mold core having a plurality of fingers; covering the inner mold core with a silicone material for many times; covering the silicone material with a plaster bandage And take out the inner mold core to obtain a hollow outer mold in the shape of a human hand, the outer mold has an inner surface, the inner surface has a plurality of nail parts and a plurality of knuckle parts, the nail parts and the The finger joints correspond to the fingernails and the finger joints of the human hand respectively; a first-hand leather material is prepared and poured into the fingernails and the finger joints on the inner surface of the outer mold; a second-hand leather is prepared material and pour it into the outer mold; remove the outer mold and take out a glove with the first hand leather material and the second hand leather material; sleeve a sock on the inner mold core, and use silicone material Coating on the sock; deploying a third-hand leather material and pouring it into the glove, and putting the inner mold into the glove; and taking out the inner mold to make the glove and the third-hand leather The material and the sock are combined to form a hand hide. The manufacturing method of claim 1, wherein the step of providing the inner mold core comprises the following sub-steps: providing a hollow inner mold in the shape of a human hand; wrapping the inner mold with a plaster bandage; A gypsum is formulated into a first material; the styrofoam and a hardener are formulated into a second material; and The first material and the second material are poured into the inner mold to obtain the inner mold core. The manufacturing method according to claim 2, wherein, in the step of preparing the first material, the weight ratio of the polyvinyl gum and the gypsum is 10:3, and the polyvinyl gum and the gypsum are stirred and then vacuumized , the first material and the second material are poured into the inner mold at the same time. The manufacturing method according to claim 2, wherein, in the step of preparing the second material, the weight ratio of the polyvinyl gum and the hardener is 20:1, and the first material and the second material are poured at the same time into the inner mold. The manufacturing method according to claim 1, further comprising a step after the outer mold is obtained, the step is to apply polyflor glue on the outer mold for multiple times. The manufacturing method according to claim 5, further comprising a step after coating the polystyrene, and the step is to wrap the glass fiber on the polyvinyl of the outermost layer of the outer mold for multiple times. The manufacturing method as claimed in claim 1, further comprising a step of cleaning the hand skin, grinding the edges of the hand skin, and repairing the holes of the hand skin. The manufacturing method according to claim 7, further comprising a step after repairing the skin of the hand, the step being to let the skin of the hand stand for at least 24 hours. The manufacturing method of claim 7, further comprising a step after repairing the hand skin, the step is to heat the hand skin to between 40 and 60 degrees for at least 12 hours. According to the manufacturing method of claim 1, in the step of splicing the sock cover, firstly the fingers of the inner mold core are coated with a silicone material, then the sock cover is sleeved on the inner mold core, and finally Coat the socks with silicone material. A hand skin, which is made by the manufacturing method of any one of claims 1 to 10, the hand skin comprises: an inner layer, the inner layer is hollow and hand-shaped, and includes a sock cover and a covering for the sock The body of the sleeve; an outer layer covering the outer surface of the inner layer; and a decoration unit disposed on the outer surface of the outer layer, the decoration unit including a plurality of nail parts and a plurality of finger joint parts. The hand leather of claim 11, wherein the body of the inner layer, the outer layer and the decorative unit are all made of silicone.

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