JPS6363454A - Wax build-up molding apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 jaw model taken from a patient.

<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, then heating it again to make it liquid, and then mounding it onto the part to be molded. , 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.

The present inventor previously filed an invention in Japanese Patent Application No. 106195/1983 in order to deal with such problems. This is shown in FIG. In the same figure, with the wax contacting part 2 and the molding part 3 heated to about 100°C by the heater 1, the dental wax rod 5 is moved forward by rotating the rubber roller 4 with your fingers, and the tip of the dental wax rod 5 is transferred to the wax melting part 2. and melt it. The melted wax flows downward along the wax melting section 2 and stays in the molding section 3. This stagnant molten wax is poured into the molded part from the tip or periphery of the molding part 3. Reference numeral 6 indicates a gripping portion, and reference numeral 7 indicates an electric cord for supplying power to the heater 1.

<Problems to be Solved by the Invention> In the structure of the prior art described above, the wax rod 5 softens due to conductive heat and radiant heat from the heater 1 or due to room temperature in summer, but retains its shape. The roller 4 is in a state where it is easily deformed by the slightest external force.
When it is transferred, it may be deformed by the force from the rollers 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 clamped and transferred between this pair of rollers. However, when the wax Ps5 is softened, it is crushed by the elastic force of the roller 4, deformed or bent, and comes out in front of the gripping portion.

When the wax rod 5 is crushed and deformed, the roller 4
This may cause problems such as the rollers 4 spinning idly, or the wax coming into contact with and adhering to the hollow part of the gripping part 6, which obstructs the transfer of the wax rod 5. Further, when the wax rod 5 is bent by the force exerted by the roller 4, the tip thereof is shifted from the center of the wax contact portion 2, causing a problem that the wax is not melted.

The present invention was made in view of the above circumstances, and aims to realize a wax build-up molding device that can transfer wax without applying any external force to the wax rod that would cause it to deform or bend. .

Means for Solving Problems〉 The wax build-up molding device according to the present invention includes a gripping portion having a through hole, a cylindrical body that is inserted into the through hole of the gripping portion from its rear end and is slidable within the through hole, A wax rod that is inserted into the cylindrical body from its rear end and descends within the cylindrical body under its own weight, a stop member that is formed at the tip of the cylindrical body and stops when the tip of the wax rod comes into contact with it, and is attached to the gripping part. a cylindrical body moving member for moving the cylindrical body back and forth within the through hole; a streamlined dish-shaped molded part positioned in front of the grip part; one end fixed to the molded part and the other end fixed to the molded part; the cylindrical body is moved forward by the operation of the cylindrical body moving member; the cylindrical body is moved forward by operation of the cylindrical body moving member; The wax rod that is moved and accommodated in the cylindrical body and stopped by the stop member is brought into contact with the wax melting section and melted, and the molten wax is built up and formed in the forming section.

Action> A wax rod is inserted into the cylindrical body from the rear end, and the cylindrical body is inserted into the through hole of the grip part while being lowered by its own weight and stopped by the stop member. When the cylindrical body reaches the roller portion, which is a moving member, the cylindrical body is pushed and passed between the rollers, so that the tip of the cylindrical body slightly protrudes from the tip of the grip portion. When using the breech surface prepared in this manner, the gripping portion and the cylindrical body are tilted as if holding a fountain pen. As a result, a force acts on the wax rod to cause it to descend downward due to its own weight, and the wax rod remains in contact with a stop member provided at the tip of the cylindrical body. When the cylindrical body is moved forward by rotating the roller, the tip of the wax stick comes into contact with the heated wax melting part, and the wax stick melts from the tip.
Flows down to the molding part and stays there. As the tip of the wax rod melts and flows out, it descends under its own weight, so that the tip of the wax rod is always in contact with the stop member. When the amount of melted wax reaches a desired amount, the roller is rotated in the opposite direction, the cylindrical body is moved backward, and the tip of the wax rod and the wax melted portion are separated. In this way, no external force is applied to the wax rod that would cause its deformation, and the wax rod is allowed to descend while maintaining its original shape.

Embodiments In FIG. 1, reference numeral 10 denotes an elongated cylindrical grip made of plastic and has a through hole 11.

Reference numeral 12 denotes a plastic cylindrical body inserted into the through hole 11, into which the wax rod 5 is inserted from the rear end. The outer diameter of the cylindrical body 12 is slightly smaller than the diameter of the through hole 11, so that the cylindrical body 12 can slide within the through hole 11. Further, the inner diameter of the cylindrical body 12 is slightly larger than the diameter of the wax rod 5, so when the cylindrical body 11 is tilted, the wax rod 5 descends under its own weight. Reference numeral 13 denotes an L-shaped stop member made of thin metal formed at the tip of the cylindrical body 12, and the length of the tip can be approximately the radius of the wax rod. The stop member 13 may also be U-shaped and fixed to the cylindrical body 12 at both ends.

Reference numeral 14 denotes a rubber tearing roller formed near the tip of the gripping portion 10, which functions as a cylindrical body moving member. As shown in FIG. 2, a similar rubber auxiliary roller 15 is provided in the gripping section 10, facing the roller 14, and the cylindrical body 12 is elastically held between the pair of rollers 14 and 15, and is moved forward. Or retreat. In the figure, if the roller 14 is rotated in the direction of the arrow a, the cylindrical body 12 moves forward in the direction of the arrow a, and conversely, if the roller 14 is rotated in the direction of the arrow, the cylindrical body 12 moves forward in the direction of the arrow b.
Move backward in the ° direction. 16 is a molded part located in front of the grip part 10, and is made of a streamlined dish member. This forming part 16 includes a molten wax retention part 17 and a retention part 17 for the molten wax.
It consists of a narrow groove 18 through which molten wax flows from the tip to the tip. 19
is a wax melting part whose one end side is fixed to the molding part 16 and whose other end side is above the molding part 16 and projects on the line in the descending direction of the wax rod 5. This wax melting part 19
And the molded part 16 is made of copper, brass, nickel-chromium alloy,
It is integrally formed of a metal with a good thermal conductivity layer, such as a cobalt-chromium alloy. 20 is a heater embedded in the wax melting section 19, and a ceramic heater or the like can be used. This heater 20 allows the wax melting section 19 and the forming section 16 to
is heated to about 100°C. The heating temperature by the heater 20 ranges from about 80°C to about 12°C depending on the material of the wax.
It is set in the range of 0℃. Reference numeral 21 denotes a heat dissipating body made of high-strength metal such as stainless steel. One end of the heat dissipating body is fixed to the tip of the gripping part 10, and the other end is curved upward in a large inverted U-shape to connect the wax melting part 19. It is fixed to the other end via a heat insulator 22. This heat sink 21 can be formed by brazing two wires curved into a predetermined shape at point A. The heat sink 21 prevents the heat from the heater 20 embedded in the wax melting part 19 from being transmitted to the gripping part 10 , and the heat dissipating body 21 prevents the wax melting part 19 and the molding part 16 from being transmitted to the grip part 10 .
It functions to maintain and fix the to the grip part 10. A lead wire 23 extends from the tip of the grip 10 to the center of the heat insulator 22, passes through the heat insulator 22, and is connected to the heater 20 to supply power thereto.

As the material for the heat insulator 22, 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. 24 is a plug for power supply, and its cord is connected to the lead wire 23. The above-mentioned lead wire 23 can also be housed in the inverted U-shaped heat dissipating body 21 formed into a tube. The heat sink 21 can be hung on a stand (not shown) and used to support the device when not in use.

FIG. 3 shows the structure of the cylindrical body 12 into which the wax rod 5 is inserted. The inner diameter of the cylindrical body 12 is preferably about 51 m to 7 N when a wax rod 5 with a diameter of 4 mm is used. By having such a size relationship, the wax rod 5 is similar to the cylindrical body 1.
2 is lifted diagonally, it descends due to its own weight and comes into contact with the stop member 13 and stops. Reference numeral 25 denotes a protruding guide formed on the surface of the cylindrical body 12, which fits into a narrow groove 26 formed in the through hole 11 of the grip part 10 (FIG. Determine the position and prevent its rotation.

FIG. 4 shows the structure of the rear end portion of the cylindrical body 12. Reference numeral 27 denotes a cylindrical weight fixed to the rear end of the wax rod 5, which has a screw-shaped needle 28 in the center. It is inserted into the center of the rear end surface of the rod 5. 29 is weight 2
The weight main body accommodated in the weight 7 slides back and forth within the weight 27.

By dropping this weight body 29 within the weight, the collision force is transmitted to the wax rod 5, and the descending edge of the wax rod 5 is increased.

This weight 27 exhibits a particularly great effect when the wax rod 5 becomes short as a result of use and the lowering blade due to its own weight becomes insufficient. Further, this weight 27 is formed to have a larger diameter than the wax rod 5, and therefore, by inserting the needle 28 into the center of the wax rod 5, the rear end of the wax rod 5 becomes suspended in the air within the cylindrical body 12. This allows the wax rod 5 to descend smoothly within the cylindrical body 12.

When using the above device, hold the device in your hand and
0 is tilted (it may be vertical), the wax rod 5 is lowered, and its tip touches the stop member 13. In this state, the roller 14 is rotated in the direction of arrow a (FIG. 2), and the cylindrical body 12 is advanced in the direction of arrow a' (FIG. 2). Thus, the tip of the wax rod 5 is heated to melt the wax 1.
9 and melts. The melted wax flows down along the wax melting section 19 and reaches the second stop section 17 of the forming section 16.
It stays in. When the desired amount of wax has been melted, the roller 14 is rotated with a finger in the direction indicated by the arrow (FIG. 2), and the cylinder 12 is retracted in the direction of arrow b' (FIG. 2). As a result, the tip of the wax rod 5 is separated from the wax melting portion 19, and wax melting is stopped. This molten wax is then poured into the part to be molded. That is, when pouring around the crown, occlusal surface, etc., from the side of the molding part 16,
In addition, when doing rope work such as shaping the cusp, the narrow groove 1
The wax is flowed through the molding section 8 at the tip of the molding section 16.

In an apparatus having such a structure, the tip of the wax stick 5 is once melted by touching the wax melting part 19, and then the cylindrical body 12 is melted.
When the wax rod 5 is moved away from the wax melting portion 19 by retreating, the stop member 13 is buried in the tip of the wax rod 5.

Therefore, the wax rod 5 is fixed by this stop member 13, and even if the grip portion 10 is tilted in the opposite direction, the wax rod 5 will not fall out from the end of the cylindrical body 121.

Further, since the cylindrical body 12 is similarly held elastically by the rollers 14 and 15, it will not fall out of the through hole 11.

Further, since the tip of the wax rod 5 is fixed by the stop member 13, the wax rod 5 is fixed at the wax melting portion 19.
It also receives radiant heat from the molded part 16, softens, and does not bend downward.

<Effects of the Invention> The wax build-up molding device according to the present invention has a structure in which a cylindrical body is inserted into the through hole of the gripping part and can be operated forward and backward from the outside, and a wax rod is further inserted into the cylindrical body. , which has a structure that allows it to descend inside the cylindrical body under its own weight, and the tip of the wax rod is stopped at a position where it does not come into contact with the wax melting part, and is brought into contact only when necessary to melt the wax. The wax rod descends under its own weight as it is consumed, and its lower end is always at a position slightly spaced from the lower end of the stop member, that is, from the wax melting part. Therefore, no external force is applied to the wax rod, so even if the wax rod is softened by conduction and radiant heat from the heater or at room temperature, and deforms even with a slight force, it retains its original state. The straight cylindrical shape is maintained, the wax rod is smoothly lowered and transferred within the cylindrical body, and the wax can be melted quickly.

Also, this type of wax usually remains heated and molten for a long time (
However, according to the present invention, since the wax is heated and melted immediately before molding, such problems of wax deterioration and deterioration do not occur.

[Brief explanation of 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 sectional view taken along the line 1-1 in FIG. 1, and FIG.
FIG. 4 is a perspective view showing the shape of the cylindrical body, FIG. 4 is a sectional view taken along line nn in FIG. 3, and FIG. 5 is a perspective view for explaining the prior art. 10...Gripping part 11...Through hole 12...
- Cylindrical body 13... Stop member 14... Roller 16... Molding section 19... Wax melting section 20... Heater 21... Heat sink 22
...Insulator 23 ...Lead wire 27 ...Weight patent Author Masato Ueno Representative of Fourplane Co., Ltd.

Claims (1)

[Claims] (1) A gripping part having a through hole, a cylindrical body that is inserted into the through hole of the gripping part from its rear end and is slidable within the through hole;
A wax rod that is inserted into the cylindrical body from its rear end and descends within the cylindrical body under its own weight, a stop member that is formed at the tip of the cylindrical body and stops when the tip of the wax rod comes into contact with it, and is attached to the gripping part. a cylindrical body moving member for moving the cylindrical body back and forth within the through hole; a streamlined dish-shaped molded part positioned in front of the grip part; one end fixed to the molded part and the other end fixed to the molded part; a wax melting portion located above and protruding on the line of descent of the wax rod;
The cylindrical body is provided with at least a heater that heats the wax melting part and the molding part, and the cylindrical body is moved forward by operation of the cylindrical body moving member, and is stopped by the stopping member housed in the cylindrical body. the above wax stick,
A wax build-up molding device, characterized in that the wax is brought into contact with the wax melting section and melted, and the melted wax is built-up molded in the molding section.