JPS63192435A - Wax building up molding apparatus - Google Patents

Abstract

(57) [Summary] 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 proposed an invention related to Japanese Patent Application No. Sho 61-106195 in order to deal with such problems. This is shown in FIG. In the same figure, with the wax melting 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 rod 5 becomes soft, 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 elastic clamping force by the rollers 4 is lost, causing the rollers 4 to spin idly,
Alternatively, wax may come into contact with and adhere to the wall surface of the through hole of the gripping part 6, causing a problem that the transfer of the wax rod 5 is obstructed. Further, when the wax rod 5 bends due to the force exerted by the roller 4, the tip of the wax rod 5 is shifted from the center of the wax melting section 2, causing a problem that the wax is not melted.

The present invention was made in view of the above circumstances, and only when the wax rod is moved forward and when the wax rod is fixedly supported in the through hole, external force is applied to the wax rod, and when the wax rod is moved, an external force is applied. The purpose is to minimize deformation of the wax rod.

<Means for Solving the Problems> The wax build-up molding apparatus according to the present invention comprises: a long rope gripping portion having a through hole in the longitudinal direction; an opening communicating with the through hole formed near the front end of the gripping portion; an elastic roller disposed within the opening and having at least its upper end protruding above the gripping portion; the roller being supported by the gripping portion in a state where the rotating shaft of the roller is movable in a direction perpendicular to the horizontal direction of the gripping length; a support body, a wax rod which is inserted into the upper two through holes and advances and descends within the through holes while contacting the rollers or being separated from the rollers; a wax rod which is fixed to the rear end of the wax rod; A locking member that allows only forward movement and fixes the wax rod in the through hole when a backward movement force is applied to the wax rod, a molded part fixed to the tip of the grip part, and one end supported by the molded part. a wax melting part whose other end is above the molding part and protrudes on the line in the descending direction of the wax rod; a heater for heating the wax melting part and the molding part; The tip of the acid roller is applied to the wax melting part to melt it, and the lower surface of the acid roller is pressed against the wax rod by rotating the roller while being pressed, thereby making it possible to forcibly move the wax rod. It is.

Embodiments In FIG. 1, reference numeral 10 denotes an elongated cylindrical grip made of plastic and has a through hole 11. A narrow groove 12 is further formed in the bottom surface of the through hole 11 along the direction of the central axis of the through hole. A wax rod 5 is inserted into the through hole 11 from the rear end side of the grip part 10. Reference numeral 13 denotes an opening communicating with the through hole 11 formed near the front end of the gripping portion 10, and 14 denotes a roller made of an elastic material such as rubber placed within the opening 13, which is gripped by a spring body 15 acting as a support. Part 1
0 so as to be elastically movable in the vertical direction.

This roller 4 is located slightly away from the wax rod 5 when no pressing force is applied from above. 16
is an auxiliary roller made of an elastic material such as rubber and formed on the lower surface of the through hole 11 opposite to the roller 14. Reference numeral 17 is fixed to the rear end of the wax rod 5, and allows the wax rod 5 to move only forward, and prevents the wax rod 5 from moving backward, and at the same time, when a backward movement force is applied to the wax rod 5, the wax rod 5 is moved into the through hole 11. This is a locking member that fixes the

18 is a molded part located in front of the grip part 10;
Consists of a streamlined dish member. Reference numeral 19 denotes a wax melting part whose one end side is fixed to the molding part 18 and whose other end side is above the molding part 18 and projects in the advancing direction of the wax rod 5. The wax melting section 19 and the molding section 18 are integrally formed of a metal with good thermal conductivity such as copper, brass, nickel-chromium alloy, cobalt-chromium alloy, or the like. 20 is a heater embedded in the wax melting section 19, and a ceramic heater or the like can be used. This heater 20 heats the wax melting section 19 and the molding section 18 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. A heat dissipation tube 21 is made of a high-strength metal such as stainless steel, and the other end thereof is curved into an inverted U shape and fixed to the other end side of the wax melting section 19. Further, this heat dissipation tube 21 functions to support the wax melting part 19 to the grip part 10, and
A lead wire to the heater 20 is passed through the tube, and serves to supply power to the heater 20. 7 is the aforementioned electric cord taken out from the rear end of the grip portion 10 and connected to the heater 20 through the inside of the grip portion 10 .

As shown in FIG. 2, the locking member 17 has a diameter larger than that of the wax rod 5, and includes a connecting portion 22 that connects to the rear end of the wax rod 5, and a metal connecting portion 22 that is connected to the rear end of the wax rod 5. It consists of a cylindrical portion 23, a pendulum portion 24 rotatably supported on the side surface of the cylindrical portion 23 around a fulcrum A, and a thin protrusion 25 formed at the lower end of the cylindrical portion 23. The coupling part 22 is
It consists of a plastic cylinder fixed to a cylindrical part 23, and the rear end of the wax rod 5 is inserted into this cylinder and connected. The protrusion 25 enters the narrow groove 12 provided in the through hole 11, and the cylindrical portion 23 slides accordingly. This restricts the position of the cylindrical portion 23 within the through hole 11. The rear end of the columnar part 23 is formed into a plate-like body 26 in the vertical direction, and the pendulum part 24 is arranged so as to surround this.
It rotates around a fulcrum A formed near the upper end of 6. The pendulum part 24 is formed into a fan shape with an angle of 70'', and when the front end B of the lower surface is located at the lowest end, the distance between the front end B of the lower surface and the upper end of the columnar part 23 is smaller than the inner diameter of the through hole 11, and the front end B is set so that it is located slightly below the lower end of the cylindrical part 23. Also, when the rear end C of the lower surface of the pendulum part 24 is located at the lowest end, the distance between the rear end C and the upper end of the cylindrical part 23 is set to be It is set to be slightly larger than the inner diameter of the hole 11. - For example, if the diameter of the wax rod 5 is 6.0 mm, the inner diameter of the through hole 11 is set to be 7.0 mm, and the inner diameter of the cylindrical portion 23 is 6.0 mm. The diameter is 6.2■, the distance between the pendulum parts 24AB is 6
．． 3 cranes (lower end protrusion is 0.1tm), AC distance is 7.
05 +n is appropriate. BC draws an arc with radius equal to the distance between AB, and in the case of the above dimensions, its length is approximately 7
．． It is 7fi. As a result, when the pendulum portion 24 rotates to the right in the figure (unlocked state), the front end B of the lower surface of the pendulum portion 24
The distance between the front part B of the lower surface of the pendulum part 24 and the upper end of the cylinder part 23 is smaller than the inner diameter of the through hole 11, and when the pendulum 24 rotates to the left in the figure (locked state), the distance between The distance is equal to the inner diameter of the through hole 11.

Next, the operation of the apparatus of this embodiment will be explained using FIGS. 2 to 4. In normal wax melting, the apparatus is held diagonally and no force is applied to the roller 14, as shown in FIG. Then, the wax rod 5 is lowered by its own weight, and its outer end is brought into contact with the wax melting part 19. At this time, the cylindrical portion 23 of the locking member 17 is made of metal, so that it has the effect of a weight and the descending edge of the wax rod 5 is increased.

FIG. 3 shows an operation in which the wax rod 5 is forcibly advanced and its tip is pressed against the wax melting part 19 to melt it. When roller 14 is pressed with finger 28, roller 1
4 moves downward against the elasticity of the spring body 15, and the lower end of the roller 14 hits the upper surface of the wax rod 5. In this state, when the roller 14 is rotated counterclockwise (in the direction of arrow a), the wax rod 5
is elastically held between this roller 14 and the auxiliary roller 16, and is moved forward (arrow b). At this time, the pendulum part 24 of the locking member 17 rotates clockwise around the fulcrum A (in the direction of arrow C), the front end B is only in contact with the bottom surface of the M through hole 11, and the cylindrical part 23 is in the forward direction. (b direction) slides smoothly. In this manner, by rotating the roller 14 to the left, a desired amount of wax is melted.

Next, when you want to stop melting the wax, as shown in FIG.
When the wax rod 5 is moved (in the direction of arrow d), the wax rod 5 also moves backward (in the direction of arrow e). This backward movement force applied to the wax rod 5 causes the pendulum portion 24 of the columnar portion 23 to rotate clockwise (
When the locking member 17 and the wax rod 5 move back approximately 7.7 fins (in the direction of arrow f), the rear end C slips between the columnar part 23 and the bottom surface of the through hole 11. As a result, the cylindrical portion 23 becomes
It is pushed upward and pressed against the ceiling of the through hole 11. In this way, a locked state is obtained by pushing the pendulum part 24, and the locking member 17 and the wax rod 5 connected thereto are fixed in the through hole 11. When unlocking is performed, As shown in FIG.
Just press and rotate it to the left.

The wax that has flowed down and stayed in the molding section 18 as described above is poured into the molded section.

For example, when pouring around the crown, occlusal surface, etc., the molding part 1
When performing detailed work such as shaping the cusp head, wax is poured from the side of the molding part 8 or through the tip of the molding part 18 to perform the molding.

In the above example, when the wax rod 5 moves backward, the distance is about 7.7 fl. With this distance, there is no risk that the tip of the wax rod 5 will be softened and deformed by receiving radiant heat from the wax melting portion 19.

FIG. 5 shows a case where another structure is adopted instead of the spring body 15 as the support body of the roller 14, and the support body 29 has a rotational coupling part 30 at the connection part with the grip part 1O. Therefore, normally the roller 14 is merely in contact with the wax rod 5, and in this case, the wax rod 5 moves downward and forward under its own weight.

When the wax rod 5 is forcibly fed, the roller 14 can be rotated by pressing the roller 14 with the finger 28, as in the previous example.

<Effects of the Invention> According to the present invention, the wax rod is not subjected to deformation during normal natural descent, and when it is forcibly moved forward and when it is moved backward into the through hole. Since an external force (pressing force) is applied from above via the roller only when the wax rod is fixedly supported by the wax rod, deformation of the wax rod can be minimized. This allows the wax rod to be moved forward smoothly, and also allows the tip of the wax rod to accurately contact the wax melting portion.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a wax build-up molding device according to an embodiment of the present invention, FIG. 2 is a perspective view showing a locking member, and FIGS. 3 and 4 are sectional views of essential parts for explaining the operation. , FIG. 5 is a sectional view showing a modified example of the roller support, and FIG. 6 is a perspective view showing a conventional device. 5... Wax stick 10... Gripping part 11... Through hole 14... Roller 17... Locking member 18... Molding part 19... Wax melting part 20... Heater 22...・Joining part 23... Cylindrical part 24... Pendulum part

Claims (5)

[Claims] (1) An elongated grip having a through hole in the longitudinal direction, an opening formed near the front end of the grip and communicating with the through hole, and an elastic roller disposed within the opening and having at least its upper end protruding above the grip. , a support that supports the roller on the gripping part in a state in which the rotation axis of the roller is movable in a direction perpendicular to the longitudinal direction of the grip; a support that is inserted into the through hole and comes into contact with the roller, or that is inserted into the through hole and contacts the roller; A wax rod is fixed to the rear end of the wax rod and moves forward and downward in the through hole while being separated from the wax rod, and when a backward movement force is applied to the wax rod, the wax rod a locking member for fixing the rod in the through hole, a molded part fixed to the tip of the grip part, one end supported by the molded part, the other end being on the molded part and on the line in the descending direction of the wax rod. It is equipped with a protruding wax melting part, a heater for heating the wax melting part and the molding part, and the wax rod is lowered naturally and its tip is applied to the wax melting part to melt it, and the roller is heated. A wax build-up molding device characterized in that the lower surface of the roller is pressed against the wax rod by rotating it in a pressed state, thereby making it possible to forcibly move the wax rod. (2) A patent characterized in that the support body is comprised of a spring body that supports the roller in a state separated from the wax rod and presses the roller against the wax rod only when a pressing force is applied to the roller. Claim 1
Wax build-up molding device described in section (3) The support body has a rotation mechanism that brings the roller into contact with the wax rod in a non-pressing state and presses the roller against the wax rod only when a pressing force is applied to the roller. Wax build-up molding device according to claim 1, characterized in that: (4) The locking member includes a connecting portion that connects to the rear end of the wax rod, a cylindrical portion provided behind the connecting portion and having a larger diameter than the wax rod, and rotatably supported on a side surface of the cylindrical portion. and a substantially sector-shaped pendulum part, the pendulum part being such that when the front end of its lower surface is located at the lowest end, the distance between the front end and the upper end of the cylindrical part is smaller than the inner diameter of the through hole, and the rear end of the lower surface of the pendulum part The wax build-up molding device according to claim 1, wherein the distance between the rear end and the upper end of the cylindrical portion is set to be larger than the inner diameter of the through hole when the wax is located at the lowest end. (5) A thin protrusion is formed at the lower end of the cylindrical portion in a direction that coincides with the central axis direction thereof, and the thin protrusion is inserted into and slides on the lower surface of the through hole along the central axis direction. The wax build-up molding device according to claim 4, characterized in that a groove is formed.