JPH0247931Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a dental wax build-up molding device.

<Prior art> In general, wax build-up molding work in dental technology involves first heating a spatula to soften or melt the solid wax and scooping it out, heating it again to make it liquid, and then mounding it onto the part to be molded. , usually repeated 10 times per tooth.
Conventionally, each time this work was performed, the technician's viewpoint would shift away from the part to be molded, making it difficult for the technician to concentrate on the work, resulting in extremely inefficient work.

The present inventor previously filed an invention in Japanese Patent Application No. 106195/1983 in order to deal with such problems.

<Problems to be solved by the invention> In the structure disclosed in the above-mentioned prior art, the heat from the heater that heats the wax contact part and the molded part is conducted to the grip part, and the grip part becomes so hot that it cannot be held in the hand, or the plastic part becomes too hot to hold. If a gripping portion is formed with a roller, it may be deformed by heat, and heat may be applied to the wax rod through the gripping portion, causing it to soften and deform, making it difficult to move the wax rod with a roller, or causing the wax rod to become difficult to move. There is a problem that the tip may shift from the center of the contact part.

The present invention has been made to solve these problems.

<Means for Solving the Problems> The wax build-up molding device according to the present invention includes a hollow gripping portion through which the wax rod passes, a gripping portion rotatably attached to the gripping portion, and the wax rod can be moved by finger operation. A transfer means such as a roller for moving forward, a contact portion located in front of the gripping portion and in contact with the front end of the wax rod, a heater fixed to the contact portion and heating the contact portion to melt the wax rod; A molding part connected below the contact and heated by the heater and in which the melted wax flows down and stays in contact with the contact part, the contact part and the molding part are maintained in the grip part, and from the contact part to the grip. It consists of a heat radiator that radiates heat conducted to other parts.

<Function> The heat from the heater fixed to the contact part and heating the contact part and the molded part tries to be conducted to the grip part side via the heat radiator, but since it is radiated to this heat radiator part, There is very little heat conduction to.

<Example> In FIGS. 1 and 2, reference numeral 1 denotes a cylindrical gripping portion, into which a wax rod 3 is passed through a hollow portion 2. Plastic such as FRP can be used as the material for the gripping portion 1. 4 is a transfer means formed in front of the grip part 1, such as a rubber roller.
The wax rod 3 penetrated through the hollow part 2 of is moved. As shown in FIG. 2, a rubber roller 5 similar to the roller 4 is provided in the gripping portion 1, and the wax rod 3 is elastically clamped by the pair of heaters 4 and 5, and its rotation. It moves due to Rotation of the roller 4 is performed by fingers,
When rotating in the direction of arrow a, the wax rod 3 moves forward (arrow a'), and when rotating in the direction of b, it moves backward (arrow
b′). 6 is placed at a position approximately 1.0 cm in front of the grip part 1, and is a contact area where the advancing wax rod 3 comes into contact with copper, brass, nickel-chromium alloy, cobalt, etc.
It is made of a metal with good thermal conductivity, such as a chromium alloy. A heater 7 such as a ceramic heater is embedded and fixed inside the contact portion 6. Reference numeral 8 denotes a molding part made of a streamlined dish member connected below the contact part 6, which functions as a wax retention part and a wax build-up molding part. This molded part 8 is the contact part 6
It is made of the same metal with good thermal conductivity. The contact portion 6 and the molding portion 8 are heated by the heater 7 . Reference numeral 9 denotes a heat sink, which is made of high-strength metal such as stainless steel, and one end of which is fixed to the front end of the grip part 1, and the other end is curved upward in a large inverted U shape, and is heat-insulated at the upper end of the contact part 6. It is fixed via the body 10. The heat sink 9 can be formed by brazing two wires curved into a predetermined shape at point A. The heat sink 9 functions to maintain and fix the contact portion 6 and the molded portion 7 to the grip portion 1 while preventing heat from the heater 7 embedded in the contact portion 6 from being transmitted to the grip portion 1 . Reference numeral 11 denotes a Lee wire extending from the front end of the grip portion 1 to the center of the heat insulating body 10, and passing through the heat insulating body 10 and connected to the heater 7 to supply power thereto. The material of the heat insulator 10 is as follows:
Heat-resistant plastics such as FRP and epoxy resins, or plastics with heat-insulating properties such as mica composite plastics and asbestos composite plastics can be used. 12 is a plug for supplying power, and its cord is connected to the lead wire 11.

When using the apparatus having the above structure, with the contact part 6 and the molding part 8 heated by the heater 7, hold the grip part 1 in your hand, rotate the roller 4 with your fingers in the direction of arrow a, and hold the wax rod 3. Push forward. When the wax is drawn, the tip of the wax stick 3 hits the contact part 6 and is heated and melted. After melting the desired amount of wax, rotate the roller 4 slightly in the opposite direction with your fingers (in the direction of arrow b).
the tip of the wax stick 3 away from the contact part 6.
The melted wax flows downward through the contact portion 6 and stays in the molding portion 8. Thereafter, this molten wax is poured from the molding section 8 into the treated section. At this time, when wax is poured around the crown of a tooth, on the occlusal surface, etc., the side surface of the molding section 8 is used, and when performing detailed work such as molding the cusp head, the tip of the molding section 8 is used.

In this embodiment, the heat sink 9 is largely curved upward in an inverted U-shape. This is due to the following reasons. That is, if the distance between the front end of the grip part 1 and the contact part 6 is increased, the molding operation becomes difficult, and the wax rod 3 may be slightly deformed or bent due to the radiant heat from the contact part 6. This results in a large misalignment between the center and the wax rod 3. Therefore, this distance is preferably about 1.0 cm. If such intervals are connected by straight heat radiating bodies, hardly any heat radiating effect can be obtained and it is not practical.

FIG. 3 shows the inverted U-shaped heat sink 9 as described above.
This shows the case where it is also used as a hook when not in use. In the figure, 13 is a stand, which is made of a metal rod such as brass or stainless steel. Reference numeral 14 denotes a voltage converter on which the stand 13 is supported, and by rotating the dial 15, the power can be turned on and off, and the heater 7 can be turned on and off.
The power supply voltage supplied to the heater is adjusted, and the heater heating temperature is controlled. Normal wax melting is about 80
It is carried out at temperatures between 120°C and 120°C. 16 is a plug that is inserted into a commercial 100V AC power outlet. When such a stand 13 is used, even if the heat of the contact part 6 is transferred to the heat sink 9 through the heat insulator 10 when not in use, a part of the heat is transferred to the stand 1.
3, the amount of heat transmitted to the grip portion 1 can be further reduced.

In the above embodiment, the lead wire 11 was configured to extend in a straight line from the front end of the grip part 1 to the heat insulator 10. However, in order to facilitate hooking on the stand 13, the lead wire 11 was arranged in an inverted U shape. Temporal heat sink 9
It can also be shaped along the following lines.

<Effect of the invention> According to the invention, the contact part and the molded part heated by the heater are maintained and fixed to the grip part by the heat radiator, so that the heat transmitted from the contact part to the grip part can be minimized. This makes it possible to suppress this to a minimum. Therefore,
Problems such as heating of the gripping portion, difficulty in operation due to heating, softening and deformation of the wax rod due to conduction heat, and bending are solved, and the wax rod can be accurately guided to the center of the contact portion.

[Brief explanation of drawings]

Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a
FIG. 1 is a sectional view taken along a line taken along the line, and FIG. 3 is a perspective view showing a state in which the embodiment device is hooked onto a stand. 1... Gripping part, 3... Wax stick, 4, 5...
Roller, 6... Contact part, 7... Heater, 8... Molding part, 9... Heat sink, 10... Heat insulator, 11...
Lead wire, 13...stand, 14...voltage converter, 15...dial.

Claims (1)

[Claims for Utility Model Registration] A gripping portion that is formed hollow and through which the wax rod passes;
a transfer means such as a roller that is rotatably attached to the gripping section and moves the wax rod forward by finger operation; a contact section that is positioned in front of the gripping section and comes into contact with the front end of the wax rod; the contacting section a heater that is fixed to the contact area and heats the contact area and melts the wax rod; a molding unit that is connected below the contact area and where the melted wax that is heated by the heater and comes into contact with the contact area flows down and stays there; and a heat radiator that maintains the molding part and the molding part in the gripping part and radiates heat conducted from the contact part to the gripping part.