JPH0423627Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention can be used, for example, in dentistry, metal engraving, etc.
Used in the so-called lost wax method, in which a wax mold is taken to make a complex mold for precious metals, etc., and then the wax mold is buried in plaster, etc., and after drying, the wax flows out to form a cavity. The present invention relates to an ultrasonic welder.

(Prior art) Conventionally, in the above-mentioned case, a needle-like tool (chip) was made to protrude from the operating section, the operating section was held in the hand, and the tip of the tip was heated by applying it to a flame such as a burner. The wax is processed while quickly melting it with the heated tip, and when the tip cools down, the tip is heated again in the same way, and this process is repeated to create the wax mold.

(Problems to be solved by the invention) In the conventional technology, since flame is used directly in this way, there is a risk of burns and fire, and the tip of the tip easily cools down, so it must be heated again in the same way. The operability is extremely poor. There were also problems such as the tip of the tip turning black because the tip of the tip was exposed to fire.

Therefore, an object of the present invention is to provide an ultrasonic welder that eliminates the danger of using fire directly and has good operability.

(Means for Solving the Problems) The feature of the present invention is that an elastic annular body is fitted near the tip of the tip to which ultrasonic vibrations are transmitted from the ultrasonic vibration generator.

(Function) When ultrasonic vibrations are transmitted from the ultrasonic vibration generator to the tip, heat is generated due to friction between the tip and the elastic annular body, and this heat is transmitted to the tip of the tip and causes the tip and the surface of the tip to heat up. Heat is also generated due to friction between the machine and the workpiece, and this sufficient heat melts the workpiece.

(Example) An embodiment of the present invention will be described based on the drawings.

As shown in FIG. 1, a chip 1 is attached to an ultrasonic vibration generator 3 to transmit ultrasonic vibrations. Chip 1 is stainless steel, brass, iron,
It is made of materials such as duralumin, titanium, and ceramic, and has a curved shape, with a thickness of approximately 3 mm. This thickness is set so that ultrasonic vibrations are easily transmitted and it is easy to operate. The tip of the chip is formed into a shape suitable for processing, such as a hemispherical, conical, or prismatic shape. An elastic annular body 2 is fitted near the tip of the chip 1. The elastic annular body 2 is the chip 1
It is made of a heat-resistant material that can be closely attached to the chip 1, generates heat due to friction with the chip 1, and is suitable for storing the heat. For example, silicone or nitrile rubber, heat-resistant plastics such as Kapton, Mylar, or Teflon, or composite resins are used.

The ultrasonic vibration generator 3 consists of two piezoelectric elements 4, 4 made of ceramic or the like, electrode plates 5 provided on both sides of the piezoelectric elements, a horn 7 located via insulating seats 6, and a load. It has a built-in square 8. The chip 1 is screwed onto the tip of the horn 7 and connected to the ultrasonic vibration generator 3, so that ultrasonic vibrations are transmitted. The ultrasonic vibration generator 3 is connected to a main body 9, and the main body is equipped with a power switch 10 and a power changeover switch 11.

Graphs A and B shown in Figure 2 compare the state of heat generation in the case of the present invention in which the elastic annular body 2 is attached to the chip 1, and in the case of only the chip without attachment, and the vertical axis is the temperature (°C ), and the horizontal axis is time (minutes). In other words, when the power of the ultrasonic vibration generator 3 is set to 15W and the elastic annular body 2 made of silicone rubber is attached to the tip of the chip 1, the temperature rises to about 200°C in about 1 minute as shown in graph A. reached,
From then on, that temperature is maintained. On the other hand, when the elastic annular body is not attached to the chip and other conditions are the same, the temperature reaches 110°C to 120°C in more than 1.5 minutes as shown in graph B.

Note that as the position of the elastic annular body 2 is moved toward the base of the chip 1, the temperature at which it generates heat decreases slightly, and also by changing the power of the ultrasonic vibration generator 3, the temperature at which it generates heat decreases. Can change temperature. Therefore, it is only necessary to set the temperature so that heat generation suitable for the object to be melted can be obtained. Moreover, by selecting the shape of the tip end, it can be used for various processing such as forming complicated grooves.

(Effects of the invention) As explained above, according to the invention, the tip is not directly heated by fire, so it is safe to work, there is no damage to the tip, and the temperature at the tip of the tip is kept constant. It has many excellent effects such as extremely good operability and easy control of heat generation temperature.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional front view of the main part, and FIG. 2 is a graph. 1... Chip, 2... Elastic annular body, 3... Ultrasonic vibration generator.

Claims (1)

[Scope of utility model registration request] An ultrasonic welder characterized in that an elastic annular body is fitted near the tip of a chip to which ultrasonic vibrations are transmitted from an ultrasonic vibration generator.