JPH02189151A - Casting method and method of producing cushioning member for positioning sheet or the like using the some casting method - Google Patents

Abstract

PURPOSE:To perform simple and accurate casting without inflicting a pain by a method wherein, in a method of casting a patient, e.g. a muscular atrophy disease, the patient is placed on a body support structure through a wet plaster sheet and bead cushion for curing. CONSTITUTION:A bag through which air is bled is filled with foamed styrole beads with a diameter of approximate 4-7mm to form a bead cushion 14 for casting. 6 plaster sheets 10 with a thickness of approximate 1mm are piled up and sandwiched in a wet state between polyethylene sheets 12. A wet plaster sheet 10 is placed on a staged chair 16 for measurement having two vertically movable seat parts 18 and 20 on both sides through the medium of the bead cushion 14, and a patient is slowly seated down in a state to hold him in arms. Air in the bead cushion 14 is bled, a proper body position is taken as the stage part of the seat part of the chair 16 is regulated, and the plaster sheet 10 is cured for casting. This method enables execution of relatively simple and accurate casting without inflicting pain on a patient.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a casting method and a mold making method such as a positioning sheet. The present invention relates to a molding method for patients with muscle atrophy disease and a method for creating molds such as positioning sheets using the molding method.

Note that the present invention is suitable for a molding method for creating a positioning sheet and a method for creating a positioning sheet, so the following explanation will be given in relation to these methods, but the present invention is suitable for creating a positioning sheet. It is not limited to molding methods for making positioning sheets and methods for making positioning sheets, but includes molding methods for making any suitable products (e.g., chairs, beds, packet sheets, etc.) and applications for such products. This includes a method for producing members.

(Prior art) For patients who need to maintain good limb posture, such as patients with progressive muscular atrophy, cerebral palsy, infantile palsy, chronic rheumatoid arthritis, etc., the patient's posture is maintained correctly and upright. A positioning sheet (sitting cushion sheet) for holding the patient in a comfortable limb position is prepared and used for treatment. For example, in order to stop the progression of a progressive muscular atrophy disease, it is necessary to maintain a good limb position, and a positioning sheet for this purpose is prepared for each patient.

The conventional molding method for creating this positioning sheet has been carried out through the following steps. Namely, (1) Wrap the body in a cast bandage.

(2) Cut the cast bandage, remove it from the body, and reattach the cast bandage.

(3) Pour plaster into the reattached cast bandage.

(4) After the plaster hardens, the cast bandage is removed from the plaster to obtain a plaster simulating a human mold.

[5] Cut the sponge to fit this plaster.

or (5)' Wrap thermoplastic resin around this plaster.

(Problems to be Solved by the Invention) However, the conventional casting method involves steps such as wrapping the body in a cast bandage and cutting, which causes pain or discomfort to the patient. In addition, it is difficult to maintain a good limb position for a patient wearing a cast, which makes it difficult to accurately maintain the shape for creating a positioning sheet. It involved a cumbersome and time-consuming process.

Therefore, an object of the present invention is to provide a relatively simple mold-taking method that allows accurate mold retention without causing pain to the patient.

Another object of the present invention is to provide a method for creating a positioning sheet and the like using the above-described molding method.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a body support structure, and on the body support structure, a bead cushion containing beads inside and having an air vent in the bag is provided. Place a moistened plaster sheet on top of the bead cushion,
A casting method is adopted in which a person is placed on a body support structure via a plaster sheet and a bead cushion, and the plaster sheet is allowed to harden in this state.

Further, the present invention provides a body support structure, and a bead cushion containing beads inside and having an air vent is placed on the body support structure, and on the bead cushion,
A moistened plaster sheet is placed on the person, the person is placed on the body support structure through the plaster sheet and bead cushion, the plaster sheet is cured in this state, and the excess portion of the cured plaster sheet is cut off. A flexible plastic sheet is heated and crimped on the back of the sheet to make a mold, a box is formed with the molded plastic sheet as the bottom, and a foam-forming material is injected into the box and foamed to form a positioning sheet, etc. This method adopts the method for creating this member.

Further, in the present invention, a gas smaller than the maximum capacity is put into a gas bag, a moistened gypsum sheet is placed on top of the gas bag, and a person is placed on top of the gypsum sheet to allow the gypsum sheet to harden in this state. This molding method is characterized by:

Furthermore, in the present invention, a gas smaller than the maximum capacity is put into a gas bag, a moistened gypsum sheet is placed on top of the gas bag, a person is placed on the gypsum sheet, and the gypsum sheet is placed in this state. Cut off the excess portion of the cured gypsum sheet, heat and press a soft plastic sheet to the back side of the cut gypsum sheet to make a mold, and form a box with the molded plastic sheet as the bottom. In this method, a positioning sheet and the like are created by injecting a foam-forming material into a box and foaming it.

(Example) The present invention will be described in detail below with reference to the drawings.In the first example, Styrofoam fine particles (commonly known as beads) with a diameter of about 4 to 7 mm are first packed into a bag from which air can escape. Create a bead cushion for casting.

This bag is constructed to be double-layered, double-layered, etc. in consideration of strength.

The amount of Styrofoam is preferably 80 to 90% of the bag's volume.

Next, as shown in Fig. 1, 6 layers of plaster sheets 10 (size is selected according to the purpose), which are prison-type sheets with a thickness of about 1 mm, are divided into two layers of 3 sheets each. Soak it in water, squeeze it out, spread the squeezed sheet over one polyethylene sheet 12, and place another one on top of the squeezed sheet.
A sheet of polyethylene 12 is placed on the wet gypsum sheet to form a sandwich between the sheets of polyethylene.

Next, as shown in FIG. 2 and FIG. 3, a step chair 16 for measurement is prepared, and the bead cushion 14 prepared as described above is placed on it. Place the plaster sheet 10 (top and bottom sandwiched between polyethylene sheets 12).
The bead cushion 14 covers almost the entire thick part of the chair 16, and the bead cushion 14 and the plaster sheet 10 are dimensioned so that they extend beyond and cover the upper frame 16a of the chair in three directions of the plaster sheet 10. It is something that can be done.

As shown in FIG. 4, the chair 16 has two thick portions 18 and 20 that are movable up and down, left and right.
20 are configured to be moved up and down independently by handles 22 and 24, thereby making it possible to create a step in the thick portion.

Next, as shown in FIG.
Have the child assume a good limb position (sitting up straight) while adjusting (Figure 4). At this time, hands are inserted through both sides of the stepped chair and the space on the back, and the gypsum sheet 10 is placed along the patient's body so that it is in close contact with the patient's body.

In this state, the gypsum sheet 10 hardens for 3 to 5 minutes, and shape retention is completed.

Next, the hardened gypsum sheet is taken down from the chair, turned over, and the excess portion around the periphery is cut off with a cast cutter, as shown in FIG. 6 (the cut points are indicated by dotted lines 32 in FIG. 6). Next, the extra unevenness of the gypsum sheet is removed and shaped by, for example, sanding off the protrusions with a file and filling the recesses with plaster of paris.

Next, a method for creating a positioning sheet using a gypsum sheet whose shape has been retained in this way will be explained.

As shown in FIG. 7, a flexible polyethylene sheet 40 (1,
5 mm + - 3 mm thick, 40 mm x 40 cm) is heated with a gas burner 42 and pressed onto the plaster sheet 10 prepared as described above to make a mold.

FIG. 8 shows a molded polyethylene sheet 40.

Next, as shown in FIG. 9, a box 44 with an open top and bottom made of a sub-all solen board is made, placed on the polyethylene sheet 40, and a flare part (glue area) 40a of the polyethylene sheet 40 is heated to make the box 44 open. It is bent along the outer surface of the lower opening of 44 and fused. FIG. 1O shows a box having a polyethylene sheet 40 formed in this manner on the bottom.

Next, for example, an integral skin form commercially available under the trademark "Azoca Form" is prepared, and RFX-361, RN-60 of this integral skin form is prepared.
Measure the two liquids of 00 and add RFX-361 and RN-6000.
and the like at a ratio of 100:34 and stirred with a stirrer for about 15 seconds.

After stirring, when foaming begins, the mixture is poured all at once into the box described above, and covered with a lid (not shown) that has been previously made with air vent holes in the sub-all solen plate.

After about 30 minutes, the box is disassembled and the positioning sheet is completed by cutting off the expanded foam. The surface of the positioning sheet thus completed is coated with a commercially available urethane resin spray. Although a vinyl resin spray for leather may be used, melanin-based or acrylic-based lacquers are not used.

In the second embodiment, as shown in FIG. 11, a gas bag 100 is used in place of the molding bead cushion 14 and chair 16 of the first embodiment. The gas bag 100 has a diameter of 75 mm, for example.
A cylindrical airtight sheet bag with a height of 110 cm and a height of 110 cm.
For example, about 60 to 80% of its volume is filled with air and sealed.

A plaster sheet 1 covering the surface of the gas bag 100 on which the patient rides
Place 0. Thereafter, in the same manner as in the first embodiment, the patient is placed on this plaster sheet 10 and kept in that position for 3 to 5 minutes. In this way, the gypsum sheet 10 hardens and shape retention is completed. The subsequent processing is the same as in the first embodiment.

In the third embodiment, the gas bag of the second embodiment is made of breathable cloth, and the beads used in the first embodiment are placed inside it. The amount of beads is 60-70% of the bag volume. The usage of the shape-retaining bag constructed in this way is the same as in the second embodiment.

(Effects of the Invention) As explained above in detail, the present invention uses a bead cushion, a plaster sheet, a stepped chair, or a gas bag to retain the shape, so it is relatively simple and easy to use, and It is possible to maintain the shape accurately without causing pain. Furthermore, the present invention uses this mold retention when creating a positioning sheet, etc., so that it is possible to create a positioning sheet simply, easily, and accurately, similar to the molding method.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a gypsum sheet sandwiched between polyethylene sheets in which a first embodiment of the present invention is used. FIG. 2 is a perspective view showing a state in which a bead cushion and a gypsum sheet are placed on a step chair. FIG. 3 is a cross-sectional view taken along line 3--3 of FIG. FIG. 4 is a perspective view showing the step chair. FIG. 5 is a rear view showing the patient in a comfortable position on a step chair. 6th rI! J is a side view showing the gypsum sheet after shape retention. FIG. 7 is a perspective view showing a state in which a polyethylene sheet is applied to a gypsum sheet. FIG. 8 is a perspective view of a cured polyethylene sheet. FIG. 9 is a perspective view showing how the box is connected to the polyethylene sheet. FIG. 10 is a perspective view of the completed box. FIG. 11 is a perspective view showing the molding method of the second embodiment. 10...Gypsum sheet 12...Polyethylene sheet 14...Bead cushion 16...Chair 18.20...Seat portion 22.24...Handle 30...Patient 40... Polyethylene sheet 44... Box 100... Gas bag Figure 5 Figure 3 Figure 4 Figure 9 Figure 10

Claims (14)

[Claims] (1) Prepare a body support structure, place a bead cushion with beads inside and an air vent in a bag on top of the body support structure, and place a moistened gypsum sheet on top of the bead cushion. . A casting method comprising: placing a person on the body support structure via the gypsum sheet and the bead cushion, and curing the gypsum sheet in this state. (2) The casting method according to claim 1, wherein the body support structure is a stepped chair. (3) The mold-taking method according to claim 2, characterized in that the patient is made to sit on a stepped chair and assume a comfortable limb position. (4) The casting method according to claim 1, wherein the gypsum sheet is a plurality of gypsum sheets sandwiched between upper and lower plastic sheets. (5) The molding method according to claim 1, wherein the gypsum sheet is spread over an upper frame of the step chair and placed on the step chair. (6) Prepare a body support structure, place a bead cushion with beads inside and an air vent in a bag on top of the body support structure, and place a wet gypsum sheet on top of the bead cushion. , Place the person on the body support structure through the plaster sheet and bead cushion, let the plaster sheet harden in this state, cut off the excess portion of the hardened plaster sheet, and remove the back side of the cut plaster sheet. A flexible plastic sheet is heated and crimped to make a mold, a box with the molded plastic sheet as the bottom is formed, and a foam-forming material is injected into the box and foamed to create positioning sheets, etc. How to create parts. (7) The manufacturing method according to claim 6, wherein the body support structure is a stepped chair. (8) The manufacturing method according to claim 7, which comprises having the patient sit on a stepped chair and assume a comfortable limb position. (9) The manufacturing method according to claim 6, wherein the gypsum sheet is a plurality of gypsum sheets sandwiched between upper and lower plastic sheets. (10) A manufacturing method according to claim 6, characterized in that the gypsum sheet is spread beyond the upper frame of the step chair and placed on the step chair. (11) Put less gas than the maximum capacity into a gas bag, place a moistened plaster sheet on top of the gas bag, place a person on top of the plaster sheet, and let the plaster sheet harden in this state. A molding method characterized by (12) Fill a gas bag with less gas than its maximum capacity, place a moistened plaster sheet on top of the gas bag, place a person on top of the plaster sheet, and cure the plaster sheet in this state. Cut off the excess portion of the cut plaster sheet, heat and press a soft plastic sheet to the back of the cut plaster sheet, make a mold, form a box with the molded plastic sheet as the bottom, and A method for creating a positioning sheet, etc. by injecting a foam-forming material and foaming it. (13) Place beads with a capacity smaller than the maximum capacity in a bag with an air vent, place a moistened gypsum sheet on top of the bag, place a person on top of the gypsum sheet, and let the gypsum sheet harden in this state. A casting method characterized by: (14) Place beads with a capacity smaller than the maximum capacity in a bag with an air vent, place a moistened gypsum sheet on top of the bag, place a person on top of the gypsum sheet, and let the gypsum sheet harden in this state. Cut off the excess portion of the hardened plaster sheet, heat and press a soft plastic sheet to the back of the cut plaster sheet, and make a mold, forming a box with the molded plastic sheet as the bottom. , A method for creating this member, in which a positioning sheet, etc. is created by injecting the foam forming material of the box and foaming it.