JPH07250850A - Die for manufacturing medical prosthesis - Google Patents

Abstract

PURPOSE:To enable vacuum molding by heightening the airtightness of a die for manufacturing a medical prosthesis inwhich a gypsum mold is formed inside. CONSTITUTION:A seal structure comprising a ring-shaped sheet made up of a very thin metal, a synthetic resin or the like are provided in a die 3 for manufacturing. In this seal structure, a first seal member 15 is arranged on a butted surface of a lid part 6 and a ring part 7, a second seal member on a butted surface of a ring part 7 and a ring part 8 and a third seal member 17 on a butted surface of the ring part 8 and a lid part 9. Thus, a space 28 in a gypsum mold is exhausted to vacuum with a vacuum exhaust pump 29 to check the entraining of a gas in a resin 30 filling the space 28, thereby allowing the permeation of the resin to every corner of the space 28.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a mold for producing a medical prosthesis.

[0002]

2. Description of the Related Art It has been conventionally known to mold a medical prosthesis such as a plate denture, artificial bone or artificial limb attachment part with resin. Molding of a medical prosthesis with this resin is provided with a manufacturing die made of metal or the like having a plurality of split mold bodies that can be disassembled and assembled, as disclosed in Japanese Patent Publication No. 57-2023. It is a method of injecting molten resin into a plaster mold formed in a mold and molding it. For example, in order to manufacture a dental prosthesis as a dental prosthesis, a wax in which artificial teeth are arranged in the same shape as the dental prosthesis. A model made of, for example, is fixed in the production mold through the plaster, and the plaster is injected into the production mold to bury the model in the plaster. After the gypsum is solidified, the model is melted and discharged to form a gypsum mold having a cavity in the shape of a denture base in the manufacturing mold. Molten resin is injected into this gypsum mold to form a plate denture. After solidifying the resin, disassemble the production mold,
The denture formed by crushing a plaster mold is taken out.

[0003]

In the above method for manufacturing a medical prosthesis, the shape of the medical prosthesis is complicated and the change in wall thickness is relatively large, so that the flow of the molten resin is not uniform. There is a problem that the molded product tends to be distorted due to the entrainment of gas generated from molten resin and the like, and in order to solve this problem, it is conceivable to inject the resin while exhausting the gypsum mold with a vacuum pump. , Applicant is Japanese Patent Application 5-15
Proposed in No. 5604. In this case, however, the airtightness of the production die can be relatively easily obtained if the abutting surfaces of the production dies having a plurality of divided dies are in a mirror finish state, but in the case where the finish state is rough, etc. It is expected that the airtightness of the production mold will deteriorate.

Therefore, an object of the present invention is to provide a mold for producing a medical prosthesis having a seal structure.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a mold for producing a medical prosthesis having a plurality of split mold bodies that can be disassembled and assembled, and a plaster mold is formed inside the split mold body. It is provided with a seal member for sealing the.

[0006]

[Operation] By using the sealing member as at least a part of the structure for sealing the space in the gypsum mold from the outside air, the resin injected into the gypsum mold suppresses gas entrapment due to the vacuum exhaust action in the gypsum mold. While being played, it spreads to every corner of the space.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 11 show a first embodiment of the present invention, in which a model 1 having the same shape as a bed prosthesis which is a medical prosthesis is formed of a heat-melting material such as wax, synthetic wax or soft resin. The artificial teeth 2 are arranged in advance on the model 1. A pressure-resistant manufacturing die 3 made of a metal material or the like is provided. As shown in FIGS. 7 to 11, the manufacturing mold 3 includes a first mold body 4
And a second mold body 5, the first mold body 4 has a lid part 6 as a first split mold body and a ring part 7 as a second split mold body, and the second mold body 5 Has a ring portion 8 which is a third split mold body and a lid portion 9 which is a fourth split mold body. Further, an injection port 10 and a discharge port 11 are provided on the abutting surfaces of the divided parts of the ring parts 7 and 8. Further, the manufacturing die 3 is provided with a fastening member 14 such as a bolt or a nut that integrates the first and second die bodies 4 and 5 in a state of being positioned by the positioning pin 12 and the positioning hole 13. Further, the manufacturing die 3 is provided with a seal structure composed of a ring-shaped seal member such as an ultrathin metal sheet or a synthetic resin sheet, and this seal structure is formed by abutting the divided portions of the lid portion 6 and the ring portion 7. The first seal member 15 is provided on the surface, and the second seal member 16 is provided on the abutting surface of the divided portion of the ring portion 7 and the ring portion 8.
The third seal member 17 is provided on the abutting surface of the divided portion of the lid 9 and the lid 9.
Are provided respectively, the first seal member 15 is attached to the lid portion 6, the second seal member 16 is attached to the ring portion 7, and the third seal member 17 is attached to the lid portion 9. Has been done. Further, each sealing member 15, 16, 17 is provided with a hole 18 for positioning / fastening, and the second sealing member 16 is divided by a groove 19 for injection / discharge. Then, in a state where the first and second mold bodies 4 and 5 are disassembled, the model 1 is fixed in the second mold body 5 via the plaster base 20 as shown in FIG. 2, and as shown in FIG. Plaster 2
1 is injected and the model 1 is first buried in the second mold body 5,
The second plaster mold 22 is formed by solidifying the plaster 21. As shown in FIG. 6, the model 1 and the inlet 10 are connected by a sprue runner 23 formed of the heat melting material, and the model 1 and the outlet 11 are connected by an air vent 24 formed of the heat melting material. . As shown in FIG. 4, the ring portion 7 is assembled on the ring portion 8 in a positioned state and integrated by the fastening member 14. The model 1 is secondarily buried by injecting the plaster 21 into the ring portion 7, and the first plaster mold 25 is formed by solidifying the plaster 21. After the gypsum 21 is solidified, the ring portion 7 is disassembled, the first and second gypsum molds 25 and 22 are divided through the dividing surface 26 of the gypsum 21, and the model 1, the sprue runner 23, and the air vent 24 are melted and discharged, And rinse off with boiling water. After the gypsum molds 25 and 22 are dried, the sealing layer 27 is formed on the inner surface of the gypsum molds 25 and 22. The sealing layer 27 is formed by applying and drying a surface treatment agent having a hardness that can withstand the injection pressure of the resin and having airtightness. As shown in FIG. 5, the first and second mold bodies 4 and 5 are assembled and the fastening member 1 is assembled.
The first and second gypsum molds 25 and 22 are integrated with each other via the 4 to make the mold closed. Space 2 that matches the shape of the denture base in this state
8 and a sprue runner 23A serving as a resin passage and an air vent 24A serving as an air / gas discharge passage. Each of the divided portions of the lid body 6, the ring portions 7 and 8 and the lid body 9 is hermetically sealed by the first, second and third sheet members 15, 16 and 17, and the space 28 is hermetically sealed by the seal layer 27. Have sex. A vacuum exhaust pump 29 is connected to the outlet 11.
As shown in FIG. 1, the polymer resin 30 melted through the injection port 10 is injected into the space 28 from the injection member 31 through a molding machine (not shown) such as an injection molding machine. At this time, the resin 30 is filled while the space 28 is evacuated by the vacuum evacuation pump 29. That is, before the resin 30 is charged, the vacuum evacuation pump 29 is operated to inject the resin 30 while exhausting the inside of the space 28 at a pressure lower than the atmospheric pressure. The capacity of the vacuum exhaust pump 29 may be appropriately selected in consideration of the volume of the space 28 and the like. The vacuum degree of the space 28 is 500 Torr to 0.00001T.
orr, preferably 20 Torr to 0.00001To
rr, and if the vacuum degree is lower than 500 Torr, it is difficult to improve the moldability, and 0.00001 Torr
If it is higher, the evacuation device and the sealing device are expensive and are not practical. The air in the airtight space 28 and the gas released from the molten resin 30 are exhausted from the exhaust port 11 by the vacuum exhaust, so that the space 28 is discharged.
In the resin 30 filled in the inside, the gas is suppressed from being entrained, and the inside of the space 28 becomes a negative pressure, so that the resin 3
The flow of 0 becomes smooth, and the resin 30 reaches every corner of the space 28, and the residual stress of the molded product after cooling is reduced. The manufacturing mold 3 is disassembled, the gypsum molds 25 and 22 are crushed, and the molded product inside is taken out. The sprue runner 23A and the air vent 24
By removing the resin 30 in the A portion, a plate denture in which molding strain is suppressed can be obtained. As described above, in this embodiment, since the manufacturing mold 3 having airtightness is provided, it is possible to fill the resin 30 while evacuating the space 28 in the gypsum molds 25 and 22 and to fill the space 28. Air and gas are exhausted 11
The resin 3 filled in the space 28 is sucked and exhausted from the
0 means that the entrainment of the gas is suppressed and the resin 3
The flow of 0 becomes smooth, and the resin 30 reaches every corner of the space 28, and the residual stress of the molded product after cooling is reduced. Also, by molding while evacuating the space 28,
The resin injection pressure, for example the injection pressure in an injection molding machine, can be made very small. As an example, the injection pressure, which was 230 kg / cm ² when the vacuum was not evacuated, was 0.0001 Tor when the vacuum degree of the space 28 was evacuated.
When r is set, the injection pressure can be reduced to 20 kg / cm ² , the capacity of the molding machine can be reduced accordingly, and the molding machine can be downsized. As an effect of the embodiment, by forming the sealing layer 27 on the inner surface of the space 28 of the gypsum molds 25 and 22 to seal the space 28, the air contained in the gypsum mold is sucked into the space 28 by the vacuum exhaust pump 29. Entry into the first seal member 15, 16 and 17 is suppressed.
One or two sealing members can be omitted, in particular the first and third sealing members 15, 17 can be omitted. Also,
By forming the seal layer 27 by coating the surface treatment agent, the smooth surface of the seal layer 27 is transferred to the resin 29, so that a glossy molded product can be obtained. Furthermore, in the case of gypsum molds, due to the problem of the material of gypsum, correction is made according to the variation in resin shrinkage of each part that occurs as the thickness of the resin molded product is uneven in each part or the structure becomes complicated. However, the sealing layer 27 has a thickness according to the degree of resin shrinkage of each part of the molded product, although the accuracy is low.
Since the coating can be performed, the dimensional correction can be easily performed.

FIG. 12 shows a second embodiment of the present invention. The same parts as those in the above embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. , 22 have seal layers 27A formed on the abutting surfaces of the divided portions. As described above, in this embodiment, since the manufacturing mold 3 having the airtightness is provided as in the first embodiment, the gypsum mold 2 is used.
It is possible to fill the resin 30 while evacuating the spaces 28 in the spaces 5 and 22, and the air, gas, etc. in the spaces 28 are sucked and evacuated from the discharge port 11, so the resin 29 filled in the spaces 28 The gas entrainment is suppressed, the flow of the resin 30 is smoothed, and the resin 30 spreads to every corner of the space 28, and the residual stress of the molded product after cooling is reduced. Further, as an effect of the embodiment, gypsum molds 25, 2
By forming the seal layer 27A on the two butting surfaces, one or two of the first, second, and third seal members 15, 16, 17 can be omitted.

FIGS. 13 to 18 show a third embodiment of the present invention. The same parts as those in the above embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. The seal structure includes a seal packing made of heat-resistant synthetic rubber or the like. In this seal structure, a first seal member 15A having a circular cross section and an annular shape is provided on the abutting surfaces of the divided portions of the lid portion 6 and the ring portion 7. The second seal member 16A having a circular cross section and a linear shape is formed on the abutting surface of the divided portion of the ring portion 7 and the ring portion 8, and the second sealing member 16A having a square cross section is formed on the abutting surface of the divided portion of the ring portion 8 and the lid portion 9. An annular third seal member 17A is provided, and the first seal member 15A is a groove formed in the lid 6 at the inner peripheral position of the fastening portion or the positioning portion as shown in FIGS. 14 and 16. The second seal member 16A fitted to 32
Is fitted in the groove 33 formed in the ring portion 7 at the inner peripheral position of the fastening portion or the positioning portion as shown in FIGS. 14 and 17, and the third seal member 17 is as shown in FIGS. It is fitted in the groove 34 formed in the lid 9 at the inner peripheral position of the fastening portion or the positioning portion. In addition, the seal member 17
A plurality of annular convex streak portions 35 are formed in the column. As described above, in this embodiment, since the manufacturing mold 3 having the airtightness is provided similarly to the first embodiment, it is possible to fill the resin 30 while evacuating the space 28 in the gypsum molds 25 and 22. Since the air, gas, etc. in the space 28 are sucked and exhausted from the exhaust port 11, the resin 30 filled in the space 28 is prevented from entraining the gas, and the flow of the resin 30 becomes smooth. 30 spreads to every corner in the space 28, and the residual stress of the molded product after cooling is reduced.

FIG. 19 shows a fourth embodiment of the present invention, in which the same parts as those in the above embodiment are designated by the same reference numerals and the description of the same parts is omitted. 21 is impregnated with resin 36 or the like and cured. By impregnating the resin 36 in this way, the airtightness of the gypsum molds 25 and 22 is improved, and it becomes easier to omit the sealing member.

FIG. 20 shows a fifth embodiment of the present invention. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. A seal member 37 is provided around the injection port 10 of the manufacturing mold 3 which is a portion facing the seal member 37.
This makes it possible to maintain the airtightness of the injection port 10,
The airtightness is further enhanced by adding the seal structure of each embodiment. The seal member 37 is formed of the above-mentioned surface hardening agent, or formed of various airtight members.

The sixth embodiment of the present invention is not shown in FIG.
In the above, the space 28 of the gypsum molds 25 and 22 and the discharge port 11 are connected by a plurality of gates. The model 1 and the discharge port 11 are connected by a plurality of air vents 24, and the space 28 is evacuated. The resin 29 is filled, and by providing a plurality of air vents 24 in an appropriate direction, the filled resin 30 flows uniformly in the space 28, and a highly accurate molded product can be obtained.

FIG. 21 shows a seventh embodiment of the present invention. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. Lid 6
The discharge port 11A is formed in the
Is connected to the upper center of the air vent 24A, and the vacuum exhaust pump 29 is connected to the discharge port 11A. In this way, the discharge port 11A is provided in the lid portion 6 and the resin 30 is filled while the space 28 is evacuated, and the same effect as the first embodiment is obtained. Further, although not shown, a discharge port may be formed in the lid portion 9 of the second mold body 5, and the discharge port and the space may be connected.

FIG. 22 shows an eighth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description of the same parts is omitted. It shows that a crown is molded, a model 38 in the shape of an artificial crown is formed from a heat-meltable material, and the model 38 is primary-embedded with plaster 21 in the second mold body 5, and a plurality of models are formed. 38 is connected by a passage 39 made of a heat-meltable material, the passage 39 and the inlet 10 are connected by a sprue runner 23, and the passage 39 and the outlet 11 are connected by an air vent 24. Next, the ring portion 7 is assembled, the plaster 21 is filled inside, and secondary burial is performed. The first and second gypsum molds 25 and 22 are formed by solidifying the gypsum 21. The gypsum molds 25 and 22 are opened, and the model 38, the passage 39, the sprue runner 23, and the air vent 24 are melted and discharged and washed away to form an artificial crown-shaped space between the gypsum molds 25 and 22.
The mold is closed through an appropriate seal structure in each of the above embodiments,
The space 30 is filled with the resin 30 while the space is evacuated by the vacuum exhaust pump 29. In the present embodiment, when molding an artificial dental crown that is a medical prosthesis, the inside of the plaster molds 25, 22 when the molds are closed is sealed from the outside air, and the plaster molds 25, 22 are sealed.
Since it is possible to fill the resin 29 while evacuating the space, the gas entrainment of the resin 30 is suppressed, the flow of the resin 29 is smoothed, and the resin 30 spreads to every corner of the space and is cooled. The residual stress of the subsequent molded product is reduced, and the occurrence of strain can be suppressed.

FIG. 23 shows a ninth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. The case where a mounting body is molded is shown. This mounting body is formed by forming a model (not shown) of a heat-fusible material in accordance with a mounting part such as an artificial leg or artificial hand, and by this model, a model-shaped space 28A in the plaster molds 25 and 22. To form. Then, while the space 28A is evacuated by the vacuum exhaust pump 29 through the outlet 11 and the air vent 24A, the resin 30 is filled to mold the mounting body. In this embodiment, when molding a mounting body for a prosthesis which is a medical prosthesis, the gypsum molds 25, 2 when the mold is closed are used.
Since it is possible to seal the inside of 2 from the outside air and to evacuate the space of the gypsum molds 25, 22 while filling the resin 30, the gas entrainment of the resin 30 is suppressed and the flow of the resin 30 is reduced. The resin 30 becomes smooth and spreads to every corner of the space, the residual stress of the molded product after cooling is reduced, and the occurrence of distortion can be suppressed.

FIG. 24 shows a tenth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. The case where the long bones are formed in the same manner as in the ninth embodiment is shown, and the resin 30 is spread all over the space 28B as in the above-mentioned embodiment.

FIG. 25 shows an eleventh embodiment of the present invention. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. In the example, the case where the seal layers 27 and 27A are formed on the entire surfaces of the plaster molds 25 and 22 is shown, which can simplify the seal structure of the manufacturing mold 3. In the present embodiment, the sealing members 15B, 16B, 17B are formed by a sealing layer formed by coating a sealing agent such as thermosetting resin.
Is formed.

FIGS. 26 and 27 show a twelfth embodiment of the present invention. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. When the sealing structure of the manufacturing die 3 is formed by using the sealing member 40 having a circular cross section as in the fourth embodiment, the sealing member 40 is fitted into the semicircular concave groove 41 of the lid portion 6, and the ring A groove 42 that is shallower than the groove 41 is formed in the portion 7, and the seal member 40 is configured to be compressed by the groove 42 when the manufacturing die 3 is integrated. You may use it for the division part of the manufacturing die 3.

28 and 29 show a thirteenth embodiment of the present invention, in which the same parts as those in the above embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. A seal structure is formed by covering the side peripheral surface of the divided portion of the production die 3 with a seal member 43, and has a shape and dimensions that almost entirely cover the side peripheral surface of the production die 3 and is divided into two parts. The cover 44, 45 made of synthetic resin or metal is provided. One end of each cover 44, 45 is connected by a hinge portion 46, and a locking projection 47 is formed at the other end of one cover 44. Then, a locking receiving portion 48 is formed at the other end of the other cover 45, and a knob 49 is continuously provided to the locking receiving portion 48, and the sheet-like sealing member 43 is provided on the inner surfaces of both covers 44, 45. It is attached. Then, both covers 44 and 45 are closed from the left and right centering on the hinge part 46 to cover the side peripheral surface of the manufacturing die 3, and are engaged by the locking projections 47 and the locking receiving parts 48 to separate the respective divided parts. It is to seal.

FIG. 30 shows a fourteenth embodiment of the present invention. In the present embodiment, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals, and the description of the same parts will be omitted. Three
A frame-shaped seal member 5 having elasticity and formed on the side peripheral surface of each of the divided portions according to the shape of the side peripheral surface of the manufacturing die 3.
0, 51, 54 are detachably mounted on the exterior, and in this example, a quadrangular manufacturing die 3 is shown.
The seal member 51 has a hole 52 corresponding to the injection member 31,
A hole 53 corresponding to the discharge port 11 is provided. Then, the sealing members 54, 51 and 50 are sequentially elastically mounted on the side peripheral surfaces of the respective divided parts of the integrated manufacturing die 3 to seal the side surfaces.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the present invention can be applied to the molding of various things such as artificial bones as long as it is a medical prosthesis, and the denture base may be a full bed or a partial bed. In addition to the injection molding machine, the molding machine can be used as a transfer molding machine, an injection compression molding machine, or the like. Further, the type of polymer resin can be applied to, for example, polycarbonate resin, polyolefin resin, polysulfone resin, styrene resin, polyurethane resin or polyacetal resin, and can be applied to thermoplastic and thermosetting resins. In the embodiment in which the seal layer is not formed on the plaster surface, the model, the sprue runner, and the air vent are melted and discharged by the method disclosed in Japanese Patent Publication No. 57-2023 without dividing the plaster mold. Good. Further, the arrangement position of the seal member and the vacuum exhaust position can be appropriately changed within the scope of the gist. For example, a sheet-shaped seal member, a seal member made of packing, a seal member made of a seal layer, and the like can be appropriately combined to form a seal structure. Although the first and second mold bodies are composed of the separable lid part and the ring part, the lid part and the ring part of at least one of the mold bodies may be integrally formed. Further, the sheet-shaped seal member may be detachably sandwiched without being adhered to the mold body. The width and other dimensions of the sheet-shaped sealing member may be selected as appropriate. Further, the seal structure of the manufacturing die is not limited to the above-mentioned embodiment, and may be constituted by appropriate means. Further, in the above embodiment, the one in which the production mold is closed by the fastening member is shown, but it may be fastened via the packing, and the fastening member is not used or used in combination, and The mold may be closed by a mold closing device.

[0019]

INDUSTRIAL APPLICABILITY The present invention has a plurality of split mold bodies that can be disassembled and assembled, and in a mold for producing a medical prosthesis in which a plaster mold is formed, a sealing member for sealing the split portions of the split mold bodies. It is possible to provide a mold for producing a medical prosthesis having the above.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 4 is a sectional view showing a first embodiment of the present invention.

FIG. 5 is a sectional view showing a first embodiment of the present invention.

FIG. 6 is a plan view showing a first embodiment of the present invention.

FIG. 7 is an exploded sectional view of a manufacturing die according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of a manufacturing die showing the first embodiment of the present invention.

FIG. 9 is a cross-sectional view of the lid of the manufacturing die showing the first embodiment of the present invention.

FIG. 10 is a cross-sectional view of the ring portion of the manufacturing die showing the first embodiment of the present invention.

FIG. 11 is a cross-sectional view of the lid part of the manufacturing die showing the first embodiment of the present invention.

FIG. 12 is an enlarged cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 13 is an enlarged cross-sectional view of the main parts showing the third embodiment of the present invention.

FIG. 14 is an exploded sectional view of a manufacturing die according to a third embodiment of the present invention.

FIG. 15 is a sectional view of a manufacturing die showing a third embodiment of the present invention.

FIG. 16 is a plan view of a lid of a manufacturing die showing a third embodiment of the present invention.

FIG. 17 is a plan view of a ring portion of a manufacturing die showing a third embodiment of the present invention.

FIG. 18 is a plan view of a lid of a manufacturing die showing a third embodiment of the present invention.

FIG. 19 is an enlarged cross-sectional view of the main parts showing the fourth embodiment of the present invention.

FIG. 20 is an enlarged cross-sectional view of essential parts showing a fifth embodiment of the present invention.

FIG. 21 is a sectional view showing a seventh embodiment of the present invention.

FIG. 22 is a plan view showing an eighth embodiment of the present invention.

FIG. 23 is a sectional view showing a ninth embodiment of the present invention.

FIG. 24 is a sectional view showing a tenth embodiment of the present invention.

FIG. 25 is a sectional view showing an eleventh embodiment of the present invention.

FIG. 26 is a sectional view showing a twelfth embodiment of the present invention.

FIG. 27 is a sectional view showing a twelfth embodiment of the present invention.

FIG. 28 is a sectional view showing a thirteenth embodiment of the present invention.

FIG. 29 is a sectional view showing a thirteenth embodiment of the present invention.

FIG. 30 is a perspective view showing a fourteenth embodiment of the present invention.

[Explanation of symbols]

4,5 type body 15,15A, 15B, 16,16A, 16B, 17,
17A, 17B, 40, 43, 50, 51, 54 Seal member 22, 25 Gypsum type

Claims (1)

[Claims] 1. A mold for producing a medical prosthesis having a plurality of split mold bodies that can be disassembled and assembled, and a plaster mold is formed therein, and a seal member for sealing the split portion of the split mold bodies. A mold for producing a medical prosthesis characterized by the following.