JPH0319780B2 - - Google Patents

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, heating it again to make it liquid, and then mounding it onto the part to be molded. , usually repeated 10 times per tooth. In the past, each time this work was performed, the viewpoint of the engineered clay would shift away from the part to be formed, making it impossible to concentrate on the work, resulting in extremely inefficient work.

The present inventor previously proposed the invention related to Japanese Patent Application No. 61-106195 in order to deal with such problems. This is shown in FIG. In the figure, the wax melting means 2 and forming means 3 are heated to about 100°C by the heater 1.
In the heated state, the dental wax stick 5 is transferred forward by rotating the rubber roller 4 with fingers, and its tip is brought into contact with the wax melting means 2 and melted. The melted wax flows downward along the wax melting means 2 and stays in the forming means 3. This stagnant molten wax is poured into the part to be molded from the tip or periphery of the molding means 3. 6 is a gripping means, and 7 is an electric cord for supplying power to the heater 1.

<Problems to be Solved by the Invention> In the structure of the above-mentioned prior art, the wax rod 5 softens due to conductive heat and radiation heat from the heater 1 or due to room temperature in summer, but does not retain its shape. Although it is present, it is in a state where it is easily deformed by a slight external force, and when it is transferred by the rollers 4, 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 the roller 4, and the wax rod 5 is elastically clamped and transferred between this pair of rollers. However, when the wax rod 5 is softened, it is crushed by the elastic force of the roller 4, deformed or bent, and comes out in front of the gripping means. When the wax rod 5 is crushed and deformed, the elastic clamping force by the rollers 4 is lost, and the rollers 4 may spin idly, or the wax may come into contact with and adhere to the hollow portion of the gripping means 6, preventing the transfer of the wax rod 5. This problem may occur. 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 melting portion 2, causing a problem that the wax is not melted.

The present invention was made in view of the above circumstances, and provides a wax build-up molding device that can transfer wax without applying any external force from the lateral direction that would cause deformation or bending to the wax rod. It is something to do.

Further, in the present invention, in addition to the weight of the wax rod itself, a forced pressing force is added as the force applied to lower the wax rod.

<Means for Solving the Problems> The wax build-up forming apparatus according to the present invention includes a gripping means having a through hole into which a wax rod is inserted and descends under its own weight, and a streamlined dish-shaped gripping means positioned in front of the gripping means. a forming means, a wax melting means having one end fixed to the forming means and the other end protruding above the forming means and on a line in the descending direction of the wax rod;
A heater means for heating the wax melting means and the forming means, which enables the wax rod to move forward by falling under its own weight, abuts against and maintains the tip of the wax rod, and moves the tip forward. a first moving means whose tip end contacts the wax melting means; the wax stick is forcibly moved forward by applying a forward force from its rear end; The device includes a second moving means that presses against the moving means, and an operation means that moves the second moving means and the first moving means forward and backward.

<Function> A resistor is fixed to the rear end of the wax rod, and this is inserted into the through hole of the gripping means. hold the device in hand,
When tilted diagonally, the wax rod descends inside the through hole under its own weight, and its tip comes out of the lower end of the gripping means and comes into contact with the holding means and stops. At this time, the lower end of the maintaining means and the wax melting means are spaced apart from each other. When the operating means is operated with a finger to operate the first moving means and the wax rod is lowered by its own weight (naturally) together with the retaining means, the tip of the retaining means comes into contact with the wax melting means, and therefore the wax rod comes into contact with the wax melting means. and melt. When the operating means is further operated to operate the second moving means and the wax rod is forcibly lowered, the tip of the wax rod is pressed against the wax melting means and the wax melting is accelerated. When the second moving means operates, the maintaining means does not move;
Its tip remains in contact with the wax melting means. After that, operate the operating means with your fingers,
When retracted, both the first moving means and the second moving means are moved back, and the tip of the retaining means to which the tip of the wax rod is fixed is separated from the wax melting means. This stops wax melting.

Embodiment 1 In FIG. 1, reference numeral 10 denotes an elongated cylindrical gripping means made of plastic, which has a through hole 11. 12 is a plastic cylindrical body inserted into this through hole 11, and a wax rod 5 is inserted from the rear end thereof.
is inserted. The outer diameter of the cylindrical body 12 is the same as that of the through hole 11.
Therefore, 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 that when the cylindrical body 12 is tilted, the wax rod 5 naturally descends under its own weight. 13 is a U-shaped maintenance member made of thin metal formed at the tip of the cylindrical body 12, and as shown in FIG.
and supports 13b on both sides. Support body 13b
is slidably mounted within the wall of the cylindrical body 12. 14 is a rubber roller formed near the tip of the gripping means 10 and serves as an operating means for the cylindrical body 12. Inside the gripping means 10, as shown in FIG.
5 are provided, and the cylindrical body 12 is elastically held between these pair of rollers 14 and 15 and moves forward or backward. In the figure, if the roller 14 is rotated in the direction of arrow a, the cylindrical body 12 moves forward in the direction of arrow a', and conversely, if the roller 14 is rotated in the direction of arrow b,
The cylindrical body 12 retreats in the direction of arrow b'. 16 is a forming means located in front of the gripping means 10;
Consists of a streamlined dish member. The shaping means 16 comprises a molten wax reservoir 17 and a narrow groove 18 through which the molten wax flows from the reservoir 17 to the tip. 1
9 has one end fixed to the forming means 16, and the other end is on the forming means 16 and is attached to the wax rod 5.
The wax melting means protrudes in the direction of descent of the wax. This wax melting means 19 and forming means 16
is integrally formed of a metal with good thermal conductivity such as copper, brass, nickel-chromium alloy, cobalt-chromium alloy, etc. 20 is a heater embedded in the wax melting means 19, and a ceramic heater or the like can be used. This heater 20 heats the wax melting means 19 and the forming means 16 to about 100°C. Note that the heating temperature by the heater 20 is set in the range of about 80° C. to about 120° C. depending on the material of the wax. Reference numeral 21 denotes a heat dissipating body made of high-strength metal such as stainless steel, one end of which is fixed to the tip of the gripping means 10, and the other end formed with a large inverted U shape upward.
It is curved into a letter shape and fixed to the other end side of the wax melting means 19 via a heat insulator 22. This heat sink 2
1 can be formed by brazing two wires curved into a predetermined shape at point A. The heat radiator 21 maintains and fixes the wax melting means 19 and the forming means 16 to the gripping means 10 while preventing the heat from the heater 20 embedded in the wax melting means 19 from being transmitted to the gripping means 10. Eggplant. 23 is a heat insulator 22 from the tip of the gripping means 10;
The lead wire extends through the center of the heater 20, passes through the heat insulator 22, and is connected to the heater 20 to supply power to it. 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. Incidentally, the lead wire 23 can also be housed in the inverted U-shaped heat dissipating body 21 which is formed into a tube shape. The heat sink 21 can be hung on a stand (not shown) and used to support the device when not in use. Reference numeral 25 denotes a substantially U-shaped locking body, which is fitted into a groove 26 formed in the gripping means 10, and its inner surface is in contact with the cylindrical body 12. This locking body 25 is
It is detachable from the gripping means 10 and is made of metal or plastic.

FIG. 3 shows a cylindrical body 12 into which a wax rod 5 is inserted.
The structure of The inner diameter of the cylindrical body 12 is approximately 5 mm to 7 mm when using the wax rod 5 with a diameter of 4 mm.
is preferred. Due to this size relationship, when the cylindrical body 12 is lifted obliquely, the wax rod 5 descends due to its own weight, comes into contact with the maintenance member 13, and stops. Reference numeral 27 denotes a protruding guide formed on the surface of the cylindrical body 12, which fits into a narrow groove 28 formed in the through hole 11 of the gripping means 10 (FIG. 1) to guide the cylindrical body 12 within the through hole 11. Determine the position and prevent its rotation. Reference numeral 29 denotes a sliding hole formed in the wall of the cylindrical body 12, in which the support body 13b is accommodated and slides back and forth. 30 is an elongated window formed in the wall surface of the cylindrical body 12 and communicates with the sliding hole 29. 3
1 is a protrusion fixed to the support 13b, and the window 3
Located within 0. The locking body 25 attached to the gripping means 10 faces the window 30 and is curved so that a portion of the locking body 25 fits into the window 30. Therefore, the left end of the protrusion 31 and the window 30 hits this locking body 25, and its movement is restricted. 32 is
A serrated surface 33 formed on the inner circumferential surface of the cylinder 12, particularly on the bottom surface thereof, is a resistor fixed to the rear end of the wax rod 5 and prevents the wax rod 5 from retreating rearward within the cylinder 12. It is something to prevent. That is, as shown in FIG. 4, the resistor 33 has two locations near its rear end and front end (indicated by B) formed with a large diameter and an acute angle.
It's tied to number 2. The serrations of the serrated surface 32 are formed in a shape that allows the resistor 33 to easily move forward and, conversely, to make it difficult to move backward. This resistor 33 has a screw-shaped needle 34 in the center,
This is inserted into the center of the rear end surface of the wax rod 5. The resistor 33 also functions as a weight, and by storing a weight 36 in the internal space 35 and transmitting the collision force to the wax rod 5, it increases the downward force of the wax rod 5.

When using the above device, hold the device in your hand,
The gripping means 10 is tilted (it may be vertical), the wax rod 5 is lowered, and its tip is attached to the maintenance member 13.
Apply to. In this state, move the roller 14 in the direction of arrow a.
direction (Fig. 2) and rotate the cylindrical body 12 in the direction of the arrow.
Move it forward in the a′ direction (Figure 2). Thus, the tip of the wax rod 5 is connected to the heated wax melting means 1.
9 and melts. In order to increase the amount of melted wax, the roller 14 may be rotated to further advance the cylindrical body 12 and the wax rod 5 may be forcibly pressed against the wax melting means 19. The melted wax flows down along the wax melting means 19 and remains in the retention section 17 of the forming means 16. When the desired amount of wax is melted, move the roller 14 with your finger in the direction of arrow b.
direction (Fig. 2) and rotate the cylindrical body 12 in the direction of the arrow.
Retreat in direction b' (Figure 2). As a result, the tip of the wax rod 5 is separated from the wax melting means 19, and wax melting is stopped. This molten wax is then poured into the part to be molded. That is,
Wax is poured from the side of the shaping means 16 when pouring around the crown or occlusal surface, or through the narrow grooves 18 when making fine work such as shaping the cusp, and is poured at the tip of the shaping means 16. It will be done.

Next, with reference to FIG. 5, the operation of the apparatus having the above configuration will be explained in order. The figure also shows the cylindrical body 12, the wax rod 5 inserted into the cylindrical body 12, and the locking body 2.
5. Only the wax melting means 19 and the forming means 16 are shown, and other parts are omitted. Also, in the figure,
Although the cylindrical body 12 and the like are depicted horizontally, the entire device is actually held in the hand and supported obliquely with the right side facing downward in the figure. Therefore, the wax rod 5 is constantly subjected to a descending force due to its own weight.

(A) In unused condition. The cylinder 12 is retracted within the gripping means 10 (FIG. 1), and the tip of the wax rod 5 is spaced apart from the wax melting means 19. The wax rod 5 descends due to its own weight, comes into contact with the stop body 13a of the maintenance member 13, and is stopped. The maintenance member 13 is attached to the cylindrical body 1
Therefore, the protrusion 31 is located at the right end of the window 30, and the locking member 25 is located on the left side thereof.

(B) This is the operation at the start of use. Roller 14 (first
2), the cylindrical body 12 is moved forward as shown by arrow a. As a result, the tip of the wax rod 5 comes into contact with the wax melting means 19. Wax melting means 19
Since the forming means 16 is heated, the tip of the wax rod 5 melts and flows into the forming means 16 as shown by arrow p. The wax rod 5 whose tip has melted and flowed out descends due to its own weight, and its tip is always in contact with the wax melting means 19.

(C) This is an operation of applying a forced force to the wax rod 5 in the direction of the wax melting means 19. When the roller 14 (FIG. 1) is rotated to move the cylindrical body 12 further forward as shown by arrow b, the maintenance member 13 retreats relative to the cylindrical body 12. As shown in FIG. 4, a resistor 33 is provided at the rear end of the wax rod 5.
is fixed, which hooks onto the serrated surface 32 of the inner circumferential surface of the cylinder 12 and which was previously attached to the wax rod 5.
prevent the retreat of Therefore, when the cylindrical body 12 is moved forward, the wax rod 5 is also moved forward while being hooked thereon, and the tip of the wax rod 5 is forcibly pressed against the wax melting means 19. This allows a large amount of wax to be melted. The melted wax flows down as shown by arrow q and stays in the molding section 16. When the cylindrical body 12 is moved forward by the rollers 14, the locking body 25 is moved by the window 30.
It will stop when it touches the left edge of. After this,
Wax melting continues as the wax rod 5 descends due to its own weight.

(D) This is an end-of-use operation. When the roller 14 is reversely rotated and the cylindrical body 12 is retreated as shown by arrow c, the tip of the wax rod 5 is separated from the wax melting means 19 and wax melting is completed. The maintenance member 13 retreats as the cylindrical body 12 retreats until the protrusion 31 abuts the locking body 25.
It works the same way.

(E) This is a backward movement of only the cylindrical body 12. When the cylindrical body 12 is further retreated as shown by arrow d, the maintenance member 13 stops against the locking body 25,
It moves forward relative to the cylindrical body 12. At the same time, the wax rod 5 descends inside the cylindrical body 12 under its own weight, and its tip abuts against the stop body 13a of the maintenance member 13.

Thus, we return to the initial state (A). This operation is repeated and the wax stick 5 is consumed.
In the above action, the moving distances indicated by arrows a to d are approximately 7 mm to 8 mm, respectively.

In the apparatus having the structure according to the above embodiment, when the tip of the wax rod 5 is once brought into contact with the wax melting means 19 and melted, and then the cylindrical body 12 is retreated to separate the wax rod 5 from the wax melting means 19, the wax rod 5 can be maintained. The member 13 is placed on the tip of the wax rod 5. The wax rod 5 is therefore fixed with this retaining member 13. Also, wax stick 5
The resistor 33 is caught on the serrated surface 32, thereby preventing it from falling off backward. Therefore, even if the gripping means 10 is tilted in the opposite direction, the wax rod 5 will not fall off from the rear end of the cylindrical body 12. Similarly, the cylindrical body 12 has rollers 14 and 15.
Since it is elastically held between the holes 11 and 11, it will not fall out from the through hole 11.

Further, the wax rod 5 has its tip connected to the maintenance member 13.
Since the wax rod 5 is fixed at , the wax rod 5 receives radiant heat from the wax melting means 19 and the forming means 16, softens, and does not bend downward.

If the cylindrical body 12 is to be pulled out from the gripping means 10 when replacing the wax rod 5, it is sufficient to first remove the locking body 25 from the gripping means 10 and rotate the roller 14 in the direction b (FIG. 2). Also, when removing the remaining wax stick 5 from the cylindrical body 12,
It is sufficient to pull it out with the serrated surface 32 on the upper side and with the resistor 33 not caught on it.

Embodiment 2 In FIG. 6, reference numeral 40 denotes an elongated, substantially cylindrical gripping means made of plastic, which has a through hole 41 and a hollowed out portion 42 formed at its bottom. This hollowed out part 42 has a slide body 43 (seventh
(Fig. 2) is fitted and supported so as to be movable back and forth, and has a serrated surface 44 (Fig. 2) on its inner surface. Reference numeral 45 denotes a substantially ring-shaped outer member, which is fixed near the front end of the slide member 43 and acts as an operating member. This extrapolation body 45 is attached to the gripping means 40
It is inserted into the outer periphery. 5 is a wax rod inserted from the rear end of the through hole 41 of the gripping means 40;
1 is slightly larger than the diameter of the wax rod 5, so that when the gripping means 40 is tilted, the wax rod 5 descends under its own weight. 46 is extrapolation body 4
As shown in FIG. 7, the stop body 46a in the center is
, supports 46b on both sides, a first locking body 47 consisting of a bent part formed between the stopper 46a and the support 46b, and a first locking body 47 formed by bending the rear end of the support 46b outward into an L-shape. It consists of a second locking body 48. As shown in FIG. 7, the support body 46b has a gentle curve C formed inside. This support 46b
are passed through small holes 49, 49 formed in the outer insert 45. As a result, the maintenance member 46
It is supported by the outer insert 45 with appropriate springiness due to the curve C, and this springiness acts as resistance when the maintenance member 46 moves. Therefore, if the extrapolation body 45 is moved back and forth, the maintenance member 46 will also move accordingly. However, when the first locking body 47 hits the front end of the gripping means 40, the maintenance member 46
The movement stops, and only the extrapolation body 45 moves against the above-mentioned resistance. The molding means 16, wax melting means 19, heater 20, etc. have the same construction as in the previous example. Reference numeral 50 denotes a heat dissipating body made of high-strength metal such as stainless steel, one end of which is fixed to the tip of the gripping means 40, and the other end curved upward in a large inverted U-shape to connect to the wax melting means 19. It is fixed to the other end. The heat sink 50 is the wax melting means 1
Heat from the heater 20 embedded in the gripping means 4
The gripping means 40 maintains and fixes the wax melting means 19 and the shaping means 16 while preventing the wax from being transferred to zero. Also, inside the heat sink 50, a lead wire 51 for supplying power to the heater 20 is provided.
(Fig. 8) are arranged. 24 is a plug for power supply, and its cord is connected to the heater 20 through the grip means 40 and the heat radiator 50. The heat sink 50 can be hung on a stand (not shown) and used to support the device when not in use. FIG. 7 shows the structures of the outer insert 45, the slide member 43, and the maintenance member 46. movably supported. A serrated surface 44 is formed on the inside of the slide body 43 . The slide body 43 has a cross section projecting outward in a dogleg shape, and fits into a hollowed out portion 42 of the gripping means 40 hollowed out in the same shape. As a result, the slide body 43 is supported by the gripping means 40 and slides back and forth along the hollowed out portion 42 . The length of the portion of the slide body 43 extending in front of the outer insert 45 is set to approximately half the distance between the outer insert 45 and the front end of the gripping means 40 when the device is not in use (the state shown in FIG. 9A). be done.

FIG. 8 shows a cross-sectional structure of the gripping means 40,
43 is a slide body, 44 is a serrated surface, on which the wax rod 5 is placed. 33 is a resistor fixed to the rear end of the wax rod 5, which prevents the wax rod 5 from moving backward. That is, as described above, the resistor 33 is formed with a large diameter and an acute angle at two locations near the rear end and the front end (indicated by B), and these acute angle portions are caught by the serrated surface 44. . Reference numeral 52 denotes a hole formed in the gripping means 40, into which the lead wires 51, 51 are arranged. This resistor 33 has a screw-shaped needle 34 at its center, which is inserted into the center of the rear end surface of the wax rod 5. The resistor 33 also functions as a weight, and by storing a weight 36 in the internal space 35 and transmitting the collision force to the wax rod 5, the lowering force of the wax rod 5 is increased.

When using the above device, hold the device in your hand,
The gripping means 40 is tilted (it may be vertical), the wax rod 5 is lowered, and the tip thereof is attached to the maintenance member 46.
Apply to. In this state, the extrapolation body 45 is advanced. The tip of the wax rod 5 thus comes into contact with the heated wax melting means 19 and is melted. In order to increase the amount of melted wax, the extraterrestrial member 45 may be further advanced to forcibly press the wax rod 5 against the wax melting means 19. The melted wax flows down along the wax melting means 19 and remains in the retention section 17 of the forming means 16. Subsequently, this molten wax is used to build up a denture model. The work is as explained in the first embodiment.

Next, the operation of the apparatus having the above structure will be explained using FIG. Although the device is drawn horizontally in the figure, in reality the device is held in the hand, as in the previous example, and is supported diagonally so that the right side in the figure faces downward. Therefore, the wax rod 5 is constantly subjected to a descending force due to its own weight.

(A) In unused condition. The slide body 43 and the outer body 45 are retracted within the gripping means 40 (FIG. 6), and the tip of the wax rod 5 is spaced apart from the wax melting means 19. wax stick 5
is lowered by its own weight, comes into contact with the stop body 46a of the maintenance member 46, and is stopped. The maintenance member 46 is in a state of moving forward (moving to the right in the figure) relative to the outer insert 45, and the first locking body 47 is locked and stopped at the front end of the gripping means 40.

(B) This is the operation at the start of use. By finger operation, the extrapolation body 45 and the slide body 43 move forward in the direction of arrow a.
It is moved as shown in . Accordingly, the retaining member 46 similarly moves, and the tip of the wax rod 5 comes into contact with the wax melting means 19. Since the wax melting means 19 and the shaping means 16 are heated, the tip of the wax rod 5 is melted and flows into the maintenance member 46 as shown by arrow p. The wax rod 5 whose tip has melted and flowed out descends due to its own weight, and its tip is always kept in contact with the wax melting means 19.
is in contact with.

(C) This is an operation of applying a forced force to the wax rod 5 in the direction of the wax melting means 19. Push the extrapolation body 45 forward as shown by arrow b, and slide the slide body 4.
3 is further advanced, the retaining member 46 retreats relative to the outer insert 45 and the slide body 43. As shown in FIG. 8, a resistor 33 is fixed to the rear end of the wax rod 5.
The slide body 43 is caught on the serrated surface 44 on the inner circumferential surface of the slide body 43 and prevents the wax rod 5 from retreating. Therefore, when the slide body 43 is moved forward, the wax rod 5 is also moved forward while being hooked thereon, and the tip of the wax rod 5 is forcibly pressed against the wax melting means 19. This allows a large amount of wax to be melted. The melted wax flows down as shown by the arrow q and forms the molding means 16.
stay in. The forward movement of the slide body 43 is stopped when the extrapolation body 45 comes into contact with the heat sink 50.
Thereafter, wax melting continues as the wax rod 5 descends due to its own weight.

(D) This is an end-of-use operation. When the outer insert 45 is retracted with a finger, the slide member 43 is also retracted accordingly, the tip of the wax rod 5 is separated from the wax melting means 19, and wax melting is completed. The maintenance member 46 moves backward as the outer insert 45 moves backward, and performs the same operation until the first locking body 47 locks the gripping means 40 in front and behind.

(E) This is a backward movement of only the extrapolation body 45. When the outer insert 45 is further retreated as shown by arrow d, the outer insert 45 comes into contact with the second locking body 48 of the maintenance member 46 and stops. At this time, the resistor 33 moves forward relative to the slide body 43.

Thus, we return to the initial state (A). This operation is repeated and the wax stick 5 is consumed.
In the above action, the moving distances indicated by arrows a to d are approximately 7 mm to 8 mm, respectively, as in the previous example.

In the apparatus having the structure according to the above embodiment, when the tip of the wax rod 5 is once brought into contact with the wax melting means 19 and melted, and then the outer insert 45 is retreated to separate the wax rod 5 from the wax melting means 19, the wax rod 5 is maintained. The stop 46a of the member 46 is embedded in the tip of the wax rod 5. The wax rod 5 is therefore fixed by this retaining member 46. Also,
The wax rod 5 is prevented from falling backward by the resistor 33 being caught on the serrated surface 44. Therefore, even if the gripping means 40 is tilted in the opposite direction, the wax rod 5 will not fall off from the rear end of the gripping means 40.

Further, the tip of the wax rod 5 is connected to the maintenance member 46.
Since the wax rod 5 is fixed at , the wax rod 5 receives radiant heat from the wax melting means 19 and the forming means 16, softens, and does not bend downward.

In the above embodiment, the slide body 43 is arranged at the bottom of the gripping means 40.
This slide body 43 is inserted into the through hole 41 of the gripping means 40.
It may be arranged on the ceiling of a building, and a serrated surface 44 is formed on the lower surface thereof. In this case, slide body 4
3 has a slight degree of freedom in the vertical direction and is constructed so as to rest on the wax rod 5 from above, and its serrated surface 44 engages with the resistor 33.

FIG. 10 shows a modification of the above embodiment, in which the slide body 53 is positioned at the bottom surface inside the through hole 41 to form recesses 55, 55, and the corresponding protrusions 54, 54 are formed at the bottom of the gripping means 40. 54. Normally, the serrated surface 44 of the slide body 53 is located below the surface of the through hole 41, and the resistor 3
3 is not hooked on this serrated surface 44. In this state, the wax rod 5 descends due to its own weight. On the other hand, when the extrapolation body 45 is pushed with a finger and the slide body 53 connected thereto is moved forward,
The concave portions 55, 55 of the slide body 53 are the convex portions 54,
54, the entire slide body 53 is slightly lifted by the protrusions 54, 54, and only then does the resistor 33 engage with the serrated surface 44. Therefore, after this state, the extrapolation body 4
5, the wax rod 5 is forcibly pushed forward and pressed against the wax melting means 19. As described above, when the planar portion of the slide body 53 rides on the convex portions 54 and 54 and the forced movement of the wax rod 5 starts, as shown in FIG. 9B, the maintenance member is moved by the operation of the first moving means. 46
comes into contact with the wax melting means 19.

<Effects of the Invention> The wax build-up molding device according to the present invention has a structure in which a wax rod is inserted into a through hole of a gripping means, and the wax rod can be lowered by its own weight. The tip of the rod is stopped at a position where it does not come into contact with the wax melting means, and the wax rod is melted by contacting it only when necessary. Furthermore, the wax build-up molding device according to the present invention includes:
The structure is such that the wax rod can be forcibly moved forward after the wax rod comes into contact with the wax melting means. Therefore, the wax rod descends under its own weight as it is consumed, and the wax is melted in predetermined amounts. When the wax rod is forcibly pressed, a large amount of wax can be melted in a short time. Further, according to this structure, since no external force is applied to the wax rod from the side, the wax rod is softened by conductive heat and radiant heat from the heater or by room temperature, and does not become deformed even by a slight force. Even if the wax stick is used, its original straight cylindrical shape is maintained, and the wax rod can be smoothly lowered and transferred within the holding means through-hole, and the wax can be melted quickly.

In addition, normally this type of wax undergoes deterioration and deterioration if heated and melted for a long time, but according to the present invention, since the wax is heated and melted immediately before molding, such deterioration and deterioration of the wax are prevented. This problem does not arise.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a wax build-up forming apparatus according to Example 1 of the present invention, FIG. 2 is a sectional view taken along the line of FIG. 1, FIG. 3 is an enlarged perspective view showing the shape of a cylindrical body, and FIG. The figure is an enlarged sectional view showing the rear end portion of the wax rod, FIGS. 5A to 5E are side views for explaining the operation, and FIG. 6 is a perspective view of the wax build-up forming apparatus according to the second embodiment of the present invention. 7 is a perspective view showing the shapes of the slide body, extrapolation body, and maintenance member, FIG. 8 is a cross-sectional view taken along the line of FIG. 6, and FIG. 9 A to E
is a side view for explaining the action, and Fig. 10 is a side view for explaining the action.
FIG. 11, a sectional view showing a modified example of the second embodiment, is a perspective view for explaining the prior art. 5... Wax stick, 10, 40... Gripping means,
11, 41... Through hole, 12... Cylindrical body, 13,
46... Maintenance member, 16... Molding means, 19...
Wax melting means, 20... heater, 32, 44
... Serrated surface, 33... Resistor, 43... Slide body.

Claims (1)

[Scope of Claims] 1. A gripping means having a through hole into which a wax rod is inserted and lowered by its own weight, a streamlined dish-shaped forming means positioned in front of the gripping means, one end fixed to the forming means and the other end Wax melting means whose side is the forming means and protrudes on a line in the descending direction of the wax rod, heater means for heating the wax melting means and the forming means, and enabling the wax rod to move forward by falling under its own weight; a first moving means that abuts and maintains the tip of the wax rod and causes the tip of the wax rod to come into contact with the wax melting means when the tip is moved forward; a second moving means for applying a forward force to the wax melting means to move it forward and pressing the tip of the wax melting means against the wax melting means; and an operation means for moving the second moving means and the first moving means forward and backward. A wax build-up forming means characterized by: 2 The first moving means includes a cylindrical body which is housed in a through hole of the gripping means so as to be movable back and forth and into which the wax rod is inserted; A retaining member that receives and maintains the tip of the rod, and as the cylindrical body moves forward, the tip of the retaining member comes into contact with the wax melting means, and the tip of the wax rod comes into contact with the wax melting means. The second moving means includes a serrated surface formed on the inner surface of the cylindrical body, and a resistor fixed to the rear end of the wax rod that engages with the serrated surface to prevent the wax rod from retreating. The tip of the wax rod is forcibly pressed against the wax melting means by moving the cylindrical body forward with the resistor engaged with the serrated surface, and the operating means comprises: 2. The wax build-up forming apparatus according to claim 1, further comprising a roller attached to the gripping means, making elastic contact with the cylindrical body, and moving the cylindrical body back and forth by rotation. 3. The maintenance member includes a stop body that the tip of the wax rod comes into contact with, a support body that slides within the wall of the cylindrical body and moves the stop body back and forth, and a support body formed on the side of the support body. The cylindrical body has a sliding hole through which the support slides, and an elongated window provided on the wall surface of the cylindrical body in which the sliding hole is located and in which the projection is located. The above-mentioned gripping means is
A locking body that is removably attached to the gripping means, slightly protrudes into the through hole, and is positioned within the window of the cylindrical body to lock the protrusion. The wax build-up forming device according to scope 2. 4. The operating stage is an outer body that is fitted into the outer periphery of the gripping means and is movable back and forth, and the first moving means is fitted into the bottom of the through hole of the gripping means so as to be movable back and forth. It consists of a slide body coupled to the outer insert, and a maintenance member that is supported by the outer insert so as to be movable back and forth and receives and maintains the tip of the wax rod, and when the slide body moves forward, The tip of the maintenance member is brought into contact with the wax melting means, and the tip of the wax rod is brought into contact with the wax melting means,
The second moving means includes a serrated surface formed on the inner surface of the slide body, and a resistor fixed to the rear end of the wax rod that engages with the serrated surface to prevent the wax rod from retreating. , by moving the slide body forward with the resistor engaged with the serrated surface, the tip of the wax rod is forcibly pressed against the wax melting means. The wax build-up forming device according to item 1. 5. The retaining means includes a stop body against which the tip of the wax rod comes into contact, a support body movably supported by the extrapolation body in the front-rear direction, and a stop body formed on the support body to stop the backward movement of the retaining means. and a second locking body formed at the rear end of the support body to stop the backward movement of the outer insert, and the retaining means moves forward or backward by operating the outer insert. 5. The wax build-up molding apparatus according to claim 4, wherein: