JPH0194849A - Wax build-up molding apparatus - Google Patents

Abstract

PURPOSE:To rapidly melt a wax rod without deforming the same, by allowing the wax rod to advance in a state placed on and received in a wax rod receiving part and pressing the same to a wax melting part. CONSTITUTION:A wax rod 5 is placed on and received in the groove having a V-shaped cross-section of a wax rod receiving part 16 and a driving force transmitting part 17 is mounted to the rear end of said wax rod 5. When a roller 12 is rotated, the wax rod 5 is advanced and moved through the driving force transmitting part 17 and the leading end thereof is pressed to a wax melting part 26. Molten wax is stayed in a molding part 25 and subsequently allowed to flow in a part to be molded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a wax build-up molding device used when forming a denture model using dental wax on a model taken from a patient.

(Prior art) -M. In wax build-up molding work in dental technology, the spatula is first warmed to soften or melt the solid wax and scooped out, heated again to make it liquid, and then piled up on the part to be molded. Work is usually - 1 per tooth
Repeated 0 times.

Traditionally, each time this work was performed, the technician's viewpoint would shift away from the part to be molded, making it difficult to concentrate on the work.
It had become extremely inefficient. In order to deal with such problems, the present inventor previously filed Japanese Patent Application No. 61-1061.
The invention related to No. 95 was proposed. This is shown in FIG. In the same figure, with the wax melting part (2) and molding part (3) heated to about 100°C by the heater (1), the dental wax stick (5) is moved forward by rotating the rubber roller (4) with your fingers. The tip is brought into contact with the wax melting part (2) and melted. The melted wax is transferred to the wax melting area (
2) and stays in the forming part (3). This retained molten wax is poured into the molded part from the tip or periphery of the molding part (3). (6) is a grip part, and (7) is an electric cord for supplying power to the heater (1).

(Problems to be solved by the invention) In the structure in the above prior art, wax rods (5
) is softened by conductive heat and radiant heat from the heater (1) or by room temperature in the summer, and although it maintains its shape, it is easily deformed by a slight external force.
It may become deformed due to the pressure constantly applied by the roller (4). That is, the roller (4) is made of rubber, and another auxiliary roller (not shown) is arranged opposite to this roller (4), and the wax rod (5) is elastically held between this pair of rollers. However, when the wax rod (5) is softened, it is crushed, deformed, or bent by the elastic force of the roller (4) and comes out in front of the gripping section. When the wax rod (5) is crushed and deformed, the elastic clamping force by the rollers (4) is lost, causing the rollers (4) to spin idly or the gripping portion (
There may be a problem that the wax comes into contact with and adheres to the wall surface of the through hole (6) and obstructs the transfer of the wax rod (5). Further, when the wax rod (5) is bent by the force exerted by the roller, the tip thereof is shifted from the center of the wax melting portion (2), causing a problem that the wax is not melted.

The present invention was made in view of these circumstances, and it is possible to transfer the wax rod while minimizing deformation of the wax by applying force in the forward or backward direction to the rear end of the wax rod. This is what I did.

<Means for Solving the Problems> The wax build-up molding device according to the present invention includes a gripping portion having an elongated cylindrical shape having a hollow portion inside, and a portion of the gripping portion near the tip thereof extending onto the surface of the gripping portion. prominently positioned,
A roller rotatably supported by the gripping portion, a first gear fixed to the central axis of the roller and rotating together with the roller, meshing with the first gear and rotating perpendicular to the central axis of rotation of the first gear. a second gear having a shaft, which is housed in the hollow portion and rotates in the same direction as the shaft of the gripping portion, and has teeth carved in a direction slightly inclined with respect to a direction perpendicular to the rotational axis; a cylindrical gear interlocked with the second gear, a slit formed in the upper part of the hollow part of the gripping part, a wax rod accommodating part formed on the slit of the gripping part and open at the top, and the cylindrical gear. A drive comprising a toothing portion that meshes with the wax rod, a fixing portion that is fixed to the rear end of the wax rod housed in the wax rod housing portion, and a connecting portion that connects the fixing portion and the toothing portion through the slit. force transmission part,
a generally dish-shaped molded part fixed to the tip of the gripping part; a wax melting part having one end fixed to the molded part and protruding on the other end or above the molded part in the forward direction of the wax rod;
comprising a heater that heats the wax melting section and the molding section, rotates the first gear, second gear, and cylindrical gear by rotating the roller, and meshes with the cylindrical gear; The wax rod accommodated in the wax rod accommodating portion is moved forward or backward through the driving force transmission portion that is moved in the direction of the rotation axis of the cylindrical gear, and the tip of the wax rod is brought into contact with or separated from the wax melting portion. At the very least, the wax rod is melted.

<Function> As shown in Fig. 2, when the roller (12) is rotated in the direction of arrow a1 with a fingertip, the first gear (13) is rotated in the same way.
The second gear (14) meshing with this rotates in the direction of arrow a2. In conjunction with the rotation of the second gear (14), the cylindrical gear (15) rotates, and the driving force transmission part (
The meshing portion (18) of 17) moves in the direction of arrow a3. As a result, the wax rod (5) moves forward toward the tip of the grip part (10), and its tip ends at the wax melting part (26) (Fig. 1).
It is pressed against it and melts. The melted wax is
It stays in the molding section (15) and is then poured into the molded section. To stop melting the wax, use the roller (12)
is rotated in the opposite direction, that is, in the direction of arrow b1. As a result, the driving force transmitting section (17) moves rearward of the gripping section (10), and therefore the wax rod (5) also moves backward. Therefore, the tip of the wax rod (5) moves away from the wax melting section (26) and melting of the wax stops.

<Example> In FIGS. 1 to 5, reference numeral (10) denotes a grip part made of plastic or metal in the shape of an elongated cylindrical body, and has a hollow part (11) inside.

(12) is a roller that is rotatably supported by the grip (lO) and is positioned near the tip of the grip (lO) with a part of it protruding from the surface; (13) is this roller (lO);
The first gear (14) is fixed to the central axis X of 2) and rotates together with the roller (12). The second gear (15) having a shaft has a rotation axis Y in the same direction as the elongated axis of the grip part (10), and has teeth in a direction slightly inclined with respect to a direction perpendicular to the rotation axis. It is a cylindrical gear with a hollow part (11) carved therein along with the second gear (14).
It is housed inside and rotatably supported. 2nd gear (1
4) and the cylindrical gear (15) have the same rotation axis Y. With this structure, the rotation axis Y of the cylindrical gear (15) can be made orthogonal to the rotation axis X of the roller (12). The conversion of such rotational driving force is performed by the first gear (
13) and the second gear (14), straight bevel gears, spiral bevel gears, face gears, screw gears, etc. can also be used. (31) is a slit formed in the upper part of the hollow part (11) of the gripping part (lO), and (17) is a wax rod formed on the slit (31) of the gripping part (lO) and opened at the top. This is the storage section. By opening the upper portion of the accommodating portion (16), the remaining amount of the wax rod (5) can be easily determined. This wax rod storage part (16
) is formed into a V-shaped groove in cross section, and a cylindrical wax rod (5) is placed and accommodated in this accommodation portion (16). The accommodation portion (16) is formed into a substantially V-shaped groove so that wax rods (5) of different diameters can be accommodated.

(17) is a driving force transmission part attached to the rear end of the wax rod (5), and a meshing part (18) that meshes with the cylindrical gear (15).
) and the fixing part (19) fixed to the rear end of the wax rod (5)
The connecting part (
20) is vertically movably supported in a hole (21) provided in the fixed part (19) and has a spherical cutout (22) at the upper end. The meshing portion (18) is formed in a substantially inverted U shape and meshes with the groove of the cylindrical gear (15). The connecting portion (20) and the meshing portion (18) are made of metal, and the meshing portion (18) is made of metal.
Has spring properties. Therefore, if you press down on Take (22),
The meshing part (18) meshes with the cylindrical gear (15) with a click feeling, and if you pull it upward, it will come off the meshing part (18) (this state is shown by the broken line in Figure 4). (18) is in a free state, and the driving force transmitting portion (17) can be moved forward or backward independently of the operation of the cylindrical gear (15). The fixed part (19) is attached to the base (
23) and a clamping part (24) formed in front of the clamping part (24), the clamping part (24) is made of a split cylindrical body made of elastic vinyl resin, etc. Open it and place the wax rod (5) on the other side of the clamping part (24).
), and the wax rod (5) is held by the elasticity of the holding part (24).

(25) is a molded part located in front of the grip part (10), and is configured in a substantially dish shape.

(26) is a wax melting part whose one end side is fixed to the molding part (25) and whose other end side is above the molding part (25) and projects on the advancing direction line of the wax rod (5). This wax melting part (26) and molding part (25) are made of aluminum, copper,
It is integrally formed from metals with good thermal conductivity such as brass, nickel-chromium alloy, cobalt-chromium alloy, etc. (27)
is a heater attached to the rear end of the molding section (25) (lower end of the wax melting section (26)), and a ceramic heater or the like can be used. This heater (27) causes the wax melting part (
26) and the molding part (25) are heated to about 100°C 6
Note that the heating temperature by the heater (27) is set in the range of about 80° C. to about 120° C. depending on the material of the wax. The heater (27) is embedded in a heater support (28) fixed to the grip (lO), and the heater support (28) is inserted into the hole (29) provided at the rear end of the molded part (25). It is fitted. With such a structure, it becomes possible to replace and use molded parts (25) of different shapes depending on the purpose. However, it is of course possible to integrally form the heater (27) molding part (25) and wax melting part (26), and it is also possible to make only the molding part (25) replaceable. A wax flow hole (30) is formed in the wax melting section (26), and the wax that has been melted by hitting the heated wax melting section (26) flows down through the flow hole (30), forming a substantially dish-like shape. It stays in the shaped molding part (25). Note that the rear end of the gripping part (io) is open,
The rear end of the cylindrical gear (15) is supported by a protrusion (32) protruding from the bottom of the cavity (11). The power transmission section (17) can be removed from the grip section (10) by moving it rearward. (7) is an electrical cord connected to the rear end of the grip (10).
) and supplies power to the heater (27).

Next, a method of using the apparatus having the above configuration will be explained.

First, the driving force transmission section (17) is attached to one end (rear end) of the wax rod (5). That is, open the clamping part (24),
The rear end of the wax rod (5) is held between the wax rods (5) and this is elastically held.

Then, with the rear connecting part (20) pulled up (22), the connecting part (20) and the meshing part (18) are moved to the hollow part (1').
1), then push down the meshing part (18) and mesh it with the cylindrical gear (15). At this time, the wax rod (5) is simultaneously accommodated in the wax rod accommodating portion (16). In the initial state, the tip of the wax rod (5) is
A small amount (approximately 2mm+ to 5mm) from the wax melting part (26)
(approximately mm) apart.

Next, if you want to melt the wax, rotate the roller (12) in the direction of arrow a1 with your fingertips. As a result, the first gear (13) rotates in the direction of arrow a1, and the second gear (14) and cylindrical gear (15) rotate in the direction of arrow a2. Along with this, the meshing part (18) of the driving force transmitting part (17) moves forward, that is, in the direction of arrow a3, and the connecting part (20) and the fixing part (19
) through which the wax rod (5) is moved forward. As the wax rod (5) moves forward, its tip is pressed against the wax melting part (26), melts it, and flows through the flow hole (3).
0) and flows into the molding section (25), where it stays. The molten wax retained in the molding section (25) is poured into the molded section, and a build-up molding operation of the denture model is performed.

If you want to melt the hooks and suction quickly and in large quantities, just rotate the roller (12) strongly in the direction of arrow a1.
On the other hand, if a small amount of wax is required, it is sufficient to rotate the rollers (12) slightly in the same direction.

If it is desired to stop melting the wax, rotate the roller (12) in the opposite direction, that is, in the direction of arrow b1. In conjunction with this, the first gear (13) similarly moves in the b1 direction, and the second gear (13) moves in the b1 direction.
4) and the cylindrical gear (15) rotate in the direction of arrow b2.

As a result, the meshing portion (18) retreats in the direction of arrow b3, and the wax rod (5) similarly retreats as the driving force transmitting portion (17) retreats. As a result, the tip of the wax rod (5) separates from the wax melting part (26), and wax melting stops.

By repeating the forward rotation (arrow al) and backward rotation (arrow bl) of the roller (12), a desired amount of wax is melted and a model is built up and molded.

Once the wax rod (5) is exhausted, it must be replaced. In such a case, take a picture (22) of the connecting part (20).
) and remove the toothing part (18) from the cylindrical gear (15), move it backward in the cavity (11), pull it out from the rear end of the grip part (10), and insert a new wax rod (
5) between the holding parts (24) and set together with the driving force transmission part (17) as described above.

<Effects of the Invention> According to the present invention, the straw stick is moved forward by applying a pressing force from the rear end while being placed and housed in the wax stick storage part, and is pressed against the wax melting part and melted. I am forced to do it. Therefore, there is no external force applied to the wax rod that would cause it to deform as seen in the conventional example, and even if the wax rod softens at room temperature and can be deformed by a slight force, it maintains its original straight cylindrical shape. The wax can be melted quickly.

Further, according to the present invention, by rotating the roller in the forward direction,
The wax rod can be advanced and can be retracted by rotation in the backward direction. Furthermore, the speed of movement of the wax rod depends on the rotational speed of the rollers. Therefore, it is possible to rapidly melt the wax stick in a short period of time, or to melt it slowly in small amounts, making it possible to realize an apparatus that is extremely conveniently suited to various technical operations.

Furthermore, this type of wax normally undergoes deterioration and deterioration when heated and melted for a long period of time, but according to the present invention, the wax is heated and melted immediately before molding, so that such deterioration and deterioration of the wax occur. There is no problem of deterioration.

[Brief explanation of the drawing]

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 perspective view showing the structure of a roller, a first gear, a second gear, a cylindrical gear, and a driving force transmission section, and FIG. Figure 1 C-
4 is a sectional view taken along line C--C in FIG. 1, FIG. 5 is a sectional view taken along line C--C in FIG. 1, and FIG. 6 is a perspective view of a conventional example.

Claims (1)

[Claims] (1) A gripping part in the shape of an elongated cylindrical body having a hollow portion inside, a roller positioned near the tip of the gripping part with a part protruding from the surface of the gripping part, and rotatably supported by the gripping part. , a first gear that is fixed to the central axis of the roller and rotates together with the roller; a second gear that meshes with the first gear and has a rotation axis perpendicular to the rotational axis of the first gear; A cylindrical gear that is stored and rotates in the same direction as the axis of the gripping part, and that is interlocked with the second gear that has teeth carved in a direction that is slightly inclined with respect to a direction perpendicular to the rotational axis. , a slit formed in the upper part of the hollow part of the gripping part, a wax rod accommodating part formed on the slit of the gripping part and open at the top, a meshing part meshing with the cylindrical gear, and the wax rod. A driving force transmitting part includes a fixing part fixed to the rear end of the wax rod housed in the housing part, and a connecting part connecting the fixing part and the meshing part via the slit, and the driving force transmitting part is fixed to the tip of the gripping part. a generally dish-shaped molding part, a wax melting part whose one end is fixed to the molding part and whose other end is on the molding part and projects in the forward direction line of the wax rod; the wax melting part and the molding part are heated; The first gear, the second gear, and the cylindrical gear are rotationally driven by rotating the roller, and are meshed with the cylindrical gear and moved in the direction of the rotation axis of the cylindrical gear. moving the wax rod housed in the wax rod accommodating section forward or backward through the driving force transmission section, and bringing the tip of the wax rod into contact with or away from the wax melting section to melt the wax rod; Wax build-up molding device featuring