JPH0677592B2 - Wax build-up molding equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wax build-up molding apparatus used when forming a denture model using a dental wax on a jaw model taken from a patient, and particularly, It is intended to improve the part where the build-up forming work is performed.

<Prior Art> Generally, in the wax build-up forming work in the dental technique, first, the wax spatula is warmed to soften or melt the solid wax to scoop it, and then it is warmed again to be a liquid, and then it is piled up on the molded part. However, it is usually repeated ten or more times per tooth. Conventionally, every time this work is performed, the viewpoint of the technician is deviated from the part to be molded, so that the work cannot be concentrated and the work is extremely inefficient. To solve such a problem, for example, there is a technique disclosed in Japanese Utility Model Publication No. 61-6900. In this technique, the wax is heated and melted in advance, and the wax is gradually made to flow down to the spatula portion. As a wax pouring structure, for example, there is a technique disclosed in Japanese Utility Model Publication No. 57-13048. This technique is used when forming dowels such as a post crown, and has a dish-shaped portion in which molten wax is retained, and a needle-shaped portion formed to be inclined to the dish-shaped portion, Through the groove formed in this needle-shaped portion, it is poured into the pores for forming the dowel.

<Problems to be Solved by the Invention> In the former prior art, since the wax is heated and melted in advance, there is a time lag before the build-up work is performed, and the wax components are separated during this time. There is a problem of deterioration or deterioration.

In the latter prior art, the molten wax retained in the dish-shaped member is poured into the hole through the needle-shaped member, and a small amount is poured and built up around the crown or the occlusal surface, or the cusp is formed. It is not suitable for detailed work.

The present invention solves such a problem.

<Means for Solving Problems> A wax build-up molding apparatus according to the present invention includes a grip portion having a through hole, a molding portion fixed to the tip of the grip portion, and a rear end inserted into the through hole of the grip portion. A wax rod that descends by its own weight, a wax melting part that has one end side supported by the molding part and the other end side that is on the molding part and projects on the descending direction line of the wax rod, and a heater that heats the wax melting part and the molding part. A stop member for preventing the wax rod from descending between the grip portion tip and the wax melting portion, and an operation portion for moving the stop member back and forth to bring the tip of the wax rod into contact with or away from the wax melting portion. , The tip of the wax rod stopped by the stop member by its own weight and lowered to the wax melting section heated by the heater by the operation of the operation section. A wax build-up molding apparatus for melting the wax rod by bringing the ends into contact with each other, and building up the melted wax in the molding section,
The molding part has a first retention part having a capacity capable of retaining the wax in an amount required for a plurality of build-up operations by flowing down the wax from the wax fusion part, and the first retention part in front of the first retention part.
A second retaining portion which is located obliquely below the slanted portion with respect to the retaining portion and has a capacity capable of retaining an amount of wax necessary for one build-up operation, and having a narrow groove that opens forward at the tip; A narrowing portion that connects the second retaining portion and the first retaining portion and has a groove through which wax flows from the first retaining portion to the second retaining portion.

<Operation> When the device is used, when the device is held like a fountain pen, the gripping portion is supported in an inclined state. As a result, the wax rod exerts a force to descend downward due to its own weight. Therefore, the wax rod is stopped by contacting the stop member provided at the tip of the grip portion. By operating the operation portion, the stop member is moved forward to bring the wax rod into contact with the wax melting portion, whereby the wax rod is melted from the tip,
It flows down along the wax melting part and stays in the first staying part of the molding part. The wax rod lowers due to its own weight as its tip melts and flows out. Thus, the tip of the wax rod is always in contact with the stop member. When the amount of wax melted reaches a predetermined amount, the stop member is retracted by the operation of the operating portion, and the wax rod tip and the wax melting portion are separated from each other. Here first
The amount of wax accumulated in the retention part is set approximately to the amount required for about 3 to 5 times of build-up work.
It is about 0.05 to 0.1 cc. The wax accumulated in the first retention part is slightly tilted forward by the device,
Through the groove of the narrowed portion, about the amount required for one build-up operation is poured into the second retaining portion. After that, the wax retained in the second retention portion is poured into the molding target portion through the narrow groove at the tip thereof. Since the capacity of the second retaining section is about 0.01 to 0.04 cc, the wax accumulated in the second retaining section is poured into the second retaining section from the first retaining section in about 3 to 5 times. Be done.

<Embodiment> In FIGS. 1 to 3, reference numeral 1 denotes an elongated rod-shaped grip portion formed of plastic or the like and having a through hole 2. 3 is a wax melting portion fixed to the tip of the grip portion 1 via a heat radiating pipe 4, 5 is a molding portion fixed to the lower end of the wax melting portion 3, and 6 is a heater embedded in the wax melting portion 3. That is, the wax melting part 3 and the molding part 5 are heated. Power is supplied to the heater 6 by a cord 7 which is penetrated through the heat radiation tube 4 and the grip portion 1 and which is taken out from the rear end of the grip portion 1. Reference numeral 8 is a stop member attached to the grip portion 1 so as to be movable back and forth, and reference numeral 9 is a slide photograph for operating the stop member 8 back and forth. Through hole 2 of the grip 1
The wax stick 10 is inserted in the
When the grip portion 1 is obliquely lifted, the grip portion 1 descends due to its own weight and abuts the stop member 8 to stop. A weight may be fixed to the rear end of the wax rod 10 in order to further improve the lowering of the wax rod 10 due to its own weight. The diameter of the through hole 2 of the grip portion 1 needs to have a value slightly larger than that of the wax rod 10 used, and in the case of a wax rod having a diameter of 4 mm, the diameter is about 5 mm to 7 mm. The wax melting part 3 is
It has a substantially columnar shape, the lower end of which is fixed to the molding portion 5, and the upper end of which is projected on the descending direction line of the wax rod 10. The molding part 5 includes a first dish-shaped retaining portion 11 having an elongated dish shape in which the wax flowing down from the wax melting portion 3 is retained, and the first retaining portion.
A second slender plate-shaped second retaining portion 12 is provided in front of the first retaining portion 11 and is inclined downward about 15 ° to 20 ° with respect to the first retaining portion 11, and the first retaining portion 11 and the second retaining portion. It is composed of a narrowed portion 13 connecting 11 and 12. The first retaining section 11 has a capacity capable of retaining the amount of wax necessary for a series of multiple build-up operations (about 3 to 5 times), and the second retaining section 12 is
Usually, it has a capacity capable of retaining the amount of wax necessary for one build-up operation. In actual work, the amount of wax varies depending on the size and shape of the teeth,
The capacity of the first retaining section 11 is about 0.05 to 0.1 cc, the second
A suitable capacity of the retention section 12 is about 0.01 to 0.04 cc. Reference numeral 4 denotes a thin groove formed at the tip of the second retention portion 12 and having an open end in the front, through which the wax is made to flow down to the molded portion so as to draw a point or a line. .
Reference numeral 15 denotes a groove formed on the surface of the narrowed portion 13, which is the first retention portion 11
The wax stored in the second retaining portion 12 is caused to flow. The narrowed portion 13 is formed thin in both the horizontal direction and the vertical direction, and is positioned above in the vertical direction. As a result, the groove 15 is also located at the upper side, and the wax accumulated in the first retaining portion 11 does not cause the second retaining portion 12 to be inclined unless the first retaining portion 11 is inclined to the front side.
It does not flow into. A horizontal depression C is shown in FIG.
FIG. 3 shows the depression D on the lower surface. The molding portion 5 and the wax melting portion 3 are formed of a metal having good thermal conductivity, such as copper, brass, nickel-chromium alloy, cobalt-chromium alloy, or the like. The wax melting section 3 and the molding section 5 are provided with a heater 6
Is heated to about 100 ° C. The heating temperature by the heater 6 depends on the wax material and is approximately 80 to 120 ° C.
It is set in the range of.

In the device having the above-mentioned configuration, by pushing the slide photograph 9 in the direction of arrow A with the finger, the stop member 8 is moved forward,
The tip of the wax rod 10 is brought into contact with the heated wax melting part 3. As a result, the wax rod 10 is melted, flows down along the wax melting section 3, and stays in the first staying section 11 of the molding section 5. The amount of wax to be melted is determined by the time of pushing the stop member 8 forward, which is determined by the technician in consideration of the build-up work. When the amount of wax reaches a predetermined amount, the slide photographing 9 is moved in the direction of arrow B, the stop member 8 is separated from the wax melting portion 3, and the melting of the wax is stopped. In addition, if a spring is built in the grip portion 1 so that an elastic force in the direction of the arrow B is constantly applied to the slide photograph 9 when the wax is not melted, the stop member 8, and thus the tip of the wax rod 10 is provided. Can be separated from the wax melting part 3.

In the apparatus having the above structure, when the wax rod 10 is once applied to the wax melting portion 3 and melted, and then the stopper member 8 is retracted to separate the wax rod 10 from the wax melting portion 3, the stopper member 8 is the wax rod. It will be buried in the tip of 10. Therefore, the wax rod 10 is fixed by the stop member 8, and the wax rod 10 does not fall out from the rear end of the through hole 2 even if the grip 1 is tilted in the opposite direction.

Further, since the tip of the wax rod 10 is fixed by the stop member 8, the wax rod 10 receives the radiant heat from the wax melting portion 3 and the molding portion 5 to soften and bend downward. Absent.

During the wax build-up operation, the wax retained in the second retention section 12 of the molding section 5 by a predetermined amount is
It is made to flow down to the occlusal surface, cusp, etc. As shown in FIG. 4, when molding the periphery of the model tooth 16 neck portion a, it is performed by stroking the poured wax on the lower surface of the second retaining portion 12. At the time of this work, Due to the presence of the depression D, there is little possibility that the other portion of the molding portion 5 comes into contact with the bump portion b. Therefore, there is very little possibility that the wax of the bumpy portion b, which has already been formed, comes into contact with the wax to melt and deform it. Further, as shown in FIG. 5, when forming the arc-shaped void periphery c of the model tooth 16, there is a risk of contacting the corner d of the adjacent tooth 16 ', but this is possible due to the presence of the depression C. Sex is minimized.

<Effects of the Invention> According to the present invention, the following effects can be obtained.

(A) The molding part is divided into a first retention part and a second retention part, and both retention parts are connected via a narrowed part. Then, the amount of wax required for a plurality of build-up operations is retained in the first retention part, and the amount of wax required for about one build-up operation is retained in the second retention part. Therefore, the amount of wax required for one build-up operation in the first retention part can be checked while flowing down to the build-up part. With such a structure, it is possible to perform a fine work of forming the cusp, for example, a precise work such as placing wax in dots or drawing a line.

(B) In the first retention part, the amount of wax required for the build-up work of several times is melted and retained just before the work, so that there is no problem of alteration or deterioration of the wax.

(C) Since the narrowed portion is provided between the first retaining portion and the second retaining portion, the build-up forming work is facilitated by the recesses formed in the lateral direction and the lower surface thereof. That is, the tooth model is
Since there are many irregularities, the lower surface of the molding part is likely to come into contact with a surface other than the part being worked during the molding work to melt the wax surface of this part, but according to the present invention, such an accident occurs. Is extremely low.

(D) The wax rod descends by its own weight as it is consumed, and its lower end is always in contact with the lower end of the stop member. A desired amount of wax is melted by bringing the tip of the wax rod into contact with or away from the wax melting portion by operating the stop member. As a result, no external force is applied to the wax rod, and even if the wax rod is softened by the conduction heat and radiant heat from the heater or at room temperature and is deformed by a slight force, the original linear cylinder. The shape is maintained, the wax rod is smoothly lowered and transferred in the through hole of the grip portion, and the wax can be quickly melted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wax build-up molding apparatus according to an embodiment of the present invention, FIG. 2 is a top view of a molding section, and FIG. 3 is FIG.
A sectional view taken along line II, FIG. 4 is a side view showing one state of the build-up forming work, and FIG. 5 is a top view showing another state of the build-up forming work. DESCRIPTION OF SYMBOLS 1 ... Gripping part, 2 ... Through hole 3 ... Wax fusion part, 5 ... Molding part 6 ... Heater, 8 ... Stop member 9 ... Slide photograph, 10 ... Wax stick 11 ... 1st retention part, 12 ... 2nd retention part 13 ... constriction, 14 ... narrow groove 15 ... groove

Claims (2)

[Claims] 1. A gripping part having a through hole, a molding part fixed to the tip of the gripping part, a wax rod which is inserted into the through hole of the gripping part from its rear end and descends by its own weight, and one end side of which is supported by the molding part. The other end side is on the molding part and protrudes on the descending direction line of the wax rod, the heater for heating the wax melting part and the molding part, and the wax between the gripping part tip and the wax melting part. The heater comprises: a stop member for preventing the wax rod from descending; and an operation unit for moving the stop member back and forth to bring the tip of the wax rod into contact with or away from the wax melting unit. The heater is operated by the operation unit. The wax rod melted by contacting the end of the wax rod stopped by the stop member with the wax rod heated to Is a wax build-up molding apparatus for build-up molding in the molding section, wherein the molding section has a capacity such that the wax flows down from the wax melting section and the amount of wax necessary for a plurality of build-up operations can be retained. A first retaining portion and a portion in front of the first retaining portion which is inclined downward with respect to the first retaining portion and has a capacity capable of retaining the wax in an amount necessary for one build-up operation, A second retention portion having a narrow groove that opens forward at the tip, and a groove that connects the second retention portion and the first retention portion and causes wax to flow from the first retention portion to the second retention portion Wax build-up molding apparatus, characterized in that 2. The wax build-up molding apparatus according to claim 1, wherein the narrowed portion has a recess in the lateral direction and a recess in the lower surface.