JP2580242B2 - Wax build-up molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a wax overlay forming apparatus used when forming a denture model using a dental wax on a jaw model obtained from a patient.

<Prior art> In general, in a wax build-up molding operation in a dental technician, first, a spatula is heated to soften or melt a solid wax to scoop it, then re-warmed to a liquid state, and then swelled in a molding part. Is usually repeated ten or more times per tooth. Conventionally, the technician's viewpoint deviates from the molded part every time this work is performed, so that the work cannot be concentrated and the work becomes extremely inefficient.

The present inventor has previously made the invention disclosed in Japanese Patent Application No. 61-186163 (Japanese Patent Application Laid-Open No. 63-40544) in order to address such a problem.

<Problems to be Solved by the Invention> In the structure disclosed in the above publication, the wax rod is once applied to the wax melting portion to be melted, and then the stop member is retracted to separate the wax rod from the wax melting portion. The stop member is buried in the tip of the wax rod. Therefore, the wax rod is fixed by the stop member, and the wax rod does not usually fall off from the rear end of the through-hole even if the grip portion is inclined in the reverse direction.

However, if the gripper is tilted upside down immediately after use of the apparatus, that is, before the tip of the wax rod has hardened, the wax rod may come off the stop member and fall off from the rear end of the gripper.

The present invention has been made to solve such a problem, and when the operation unit is retracted to separate the wax rod from the wax melting unit, the wax rod can be securely fixed to the device. It is a structure.

<Means for Solving the Problems> A wax build-up molding device according to the present invention has a through-hole, a grip portion having a tube fixed in the through-hole; a streamlined dish fixed to the tip of the grip portion. Shaped rod; a wax rod which is inserted into the tube of the gripping part from the rear end and descends by its own weight; one end is fixed to the molded part, the other end is on the molded part, and the descent direction of the wax rod A wax melting portion protruding on a line; a heater for heating the wax melting portion and the molding portion; a stop member for preventing the wax rod from descending between the tip of the grip portion and the wax melting portion;
An operating section formed on the gripping section, which moves the stop member back and forth to contact or separate the tip of the wax rod from the wax melting section; the operating section is provided only when the operating section is located at the rearmost position. A fixing member for fixing the wax rod by abutting or piercing; and by the forward operation of the operating portion, the wax melting portion heated by the heater and the wax melting portion lowered by its own weight to the stop member. The wax rod is melted by bringing the tip of the wax rod stopped into contact with the melted wax rod, and the molten wax is subjected to wax build-up molding in the molding section.

<Operation> When using the device, if the user holds the device as if holding a fountain pen, the gripper is supported in an inclined state. The wax rod has a force to descend downward by its own weight.
Therefore, the wax rod stops in contact with the stop member provided at the tip of the gripping portion. By the forward operation of the operation unit, the tip of the wax rod comes into contact with the wax melting unit. As a result, the wax rod is melted from the tip, flows down along the wax melting part, and stays in the forming part. The tip of the wax rod is lowered by its own weight as the tip melts and flows out. As a result, the tip end of the wax rod is always in contact with the stop member. When the melting amount of the wax reaches a desired amount, the tip of the wax rod and the wax melting portion are separated from each other by operating the operation unit.

When the operation unit is moved to the rearmost position, the fixing member abuts or pierces the wax rod, and the wax rod is fixed. This makes it possible to hold the device with the gripper rear end down.
The wax stick does not fall off.

<Embodiment> In FIG. 1, reference numeral 1 denotes an elongated rod-shaped grip portion formed of plastic or the like, which has a through hole 2. 3 is a metal tube fixed in the through hole 2, 4 is a streamlined dish-shaped formed portion fixed to the tip of the gripper 1, 5 is inserted into the tube 3 from the rear end and descends by its own weight Wax stick, 6 is molded part 4
Is a wax melting part whose one end is fixed and the other end is on the molding part 4 and protrudes in the direction of descent of the wax rod 5. A heater 7 heats the wax melting part 6 and the molding part 4 and is embedded in the wax melting part 6. Have been. Power is supplied to the heater 7 from the electric cord 8 through the inside of the grip portion 1. 9
Is an L-shaped stop member made of a thin metal protruding from the tip of the grip portion 1, and the length of the tip can be set to the radius of the wax rod 5. An operation unit 10 is slidably supported by a long hole 11 formed near the tip of the grip unit 1, and the stop member 9 is fixed to the tip.
The front and rear movement of the stop member 9 and thus the front and rear movement of the wax rod 5 are operated and controlled by the operation unit 10.

The wax rod 5 inserted into the tube 3 descends by its own weight when the grip portion 1 is lifted diagonally, and comes into contact with the stop member 9 and stops. The inner diameter of the tube 3 needs to be slightly larger than the wax rod 5 used, and in the case of a 4 mm diameter wax rod, the diameter is preferably about 5 mm to 7 mm.

The forming part 4 and the wax melting part 6 are formed of a metal having good heat conductivity, for example, copper, brass, a nickel-chromium alloy, a cobalt-chromium alloy, or the like. Therefore, this molded part 4
The wax melting section 6 is heated to about 100 ° C. by a heater 7. The heating temperature of the heater 7 is set in the range of about 80 ° C. to 120 ° C. depending on the wax material.

In FIG. 2, reference numeral 12 denotes a narrow groove formed near the distal end of the tubular body 3, reference numeral 13 denotes a small hole formed at the rear end of the narrow groove 12, and reference numeral 14 denotes an operation unit.
A wire-like spring body fixed to the bottom surface of the wire 10 serves as a fixing member for the wax rod 5. That is, one end of the spring body 14 is
The other end is in contact with the narrow groove 12 and the other end protrudes into the tube 3 from the small hole 13 only when the operation unit 10 is located at the rearmost position. Abut or pierce the rod 5 to fix it.

At the rear end of the wax rod 5 (not shown), a cylindrical metal weight having substantially the same diameter as that of the wax rod 5 is attached to accelerate the weight falling speed of the wax rod 5.

Next, the operation of the device of the present invention will be described with reference to FIGS. FIG. 1A shows a state where the apparatus is not used or a state where the wax is not melted. In such a state, the operation unit 10 is located at the rearmost position. Therefore, the tip of the spring body 14 abuts or pierces the wax rod 5 through the small hole 13 to fix it. Therefore, the wax rod 5 is fixedly held in the tubular body 3 even if the apparatus is held with the rear end of the grip portion 1 facing down.

On the other hand, when the device is held in hand in use and the operation unit 10 is moved forward with a finger, the spring body 14 comes out of the small hole 13 as shown in FIG.
It slides forward in the narrow groove 12. When the apparatus is held obliquely so that the tip of the gripper 1 is downward, the wax rod 5 descends by its own weight with the advance of the stop member 9, comes into contact with the wax melting part 6, and the wax rod 5 is melted. The wax melting amount is determined by the time during which the tip of the wax rod 5 is in contact with the wax melting portion 6. The molten wax flows down along the wax melting section 6 and stays in the forming section 4. Thereafter, the molten wax is poured into the molded part. That is, when pouring around the crown, the occlusal surface, etc.,
In the case of performing fine work such as molding of the cusp, it is performed at the tip of the molded portion 4.

<Effects of the Invention> The wax build-up molding device according to the present invention includes:
Fixing the tube where the wax rod descends by its own weight, stopping the tip of the wax rod at a position where it does not come into contact with the wax melting section, and providing an operation section for controlling the interval between the two, and bringing it into contact when necessary to melt the wax It is. The wax rod descends by its own weight as it is consumed, and its lower end is always at the position where the lower end of the stop member, that is, the wax melting portion can contact. Therefore, since no external force is applied to the wax rod, even if the wax rod is softened by conduction heat and radiant heat from a heater or at room temperature and is deformed by a slight force, the original state of the wax rod is maintained. The straight cylindrical shape is maintained, and the wax rod is smoothly lowered and transported in the holding portion tube, so that the wax can be melted quickly.

In general, this kind of wax is deteriorated or deteriorated when heated and melted for a long time, but according to the present invention, since heating and melting of the wax are performed immediately before molding, such deterioration and deterioration of the wax are performed. The problem does not arise.

Furthermore, according to the present invention, only when the operation unit is located at the rearmost position, a fixing member is provided for abutting or piercing the wax rod and fixing the same in the pipe body. Is held downward, and even if a downward descent force acts on the wax rod, it can be securely fixed. This can prevent the wax rod from falling off from the rear end of the grip portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wax overlay molding apparatus according to an embodiment of the present invention, and FIGS. 2 (A) and 2 (B) are cross-sectional views corresponding to a cross section taken along line II of FIG. DESCRIPTION OF SYMBOLS 1 ... Grip | hold part, 2 ... Through-hole 3 ... Tube, 4 ... Molding part 5 ... Wax rod, 6 ... Wax melting part 7 ... Heater, 9 ... Stop member 10 ... Operation part, 14 …… Spring body

Claims (2)

(57) [Claims] 1. A grip portion having a through hole and a tube fixed in the through hole; a streamlined dish-shaped molded portion fixed to the tip of the grip portion; A wax rod inserted from the end and descending by its own weight; a wax melting section having one end fixed to the molding section and the other end being on the molding section and projecting in a line of descent of the wax rod; the wax fusion section and the molding A heating member; a stop member for preventing the lowering of the wax rod between the gripper tip and the wax melting portion; moving the stop member back and forth to contact or separate the wax rod tip with the wax melting portion. An operating section formed on the grip section; a fixing member for fixing the wax rod by abutting or piercing the wax rod only when the operating section is located at the rearmost position;
By the forward operation of the operation unit, the wax melting unit heated by the heater is brought into contact with the tip of the wax rod lowered by its own weight and stopped by the stop member. A wax build-up molding apparatus characterized in that the wax rod is melted, and the melted wax is formed in the forming section. 2. The fixing member according to claim 1, wherein one end of the fixing member is fixed to the operating portion, and the other end is located at the rearmost position on the operating portion. 2. The wax build-up molding device according to claim 1, comprising a wire-shaped spring body protruding to the end and abutting or piercing the wax rod.