JPH0622985A - Molding device for dental treatment - Google Patents

Abstract

PURPOSE:To uniformly press the whole by installing a drawing mold which is thinner toward the top edge in correspondence with a tooth mold and tightening an elastic body in symmetrical form into the tooth mold, in the molding of a tooth crown in which a thin plate made of dental material is nipped between the tooth mold and the elastic body and press-molded. CONSTITUTION:A tooth mold 1 as male mold shaped to a necessary tooth shape with plaster, etc., is placed on a pressing punch 7, and a thin plate 4 as pressed member is interposed between the tooth mold 1 and an elastic body 2, pressed by a creased press 9 whose periphery is elastically supported by a spring 10. The pressing punch 7 is driven to push the tooth mold 1 into the elastic bodies (rubbers) 2 and 3 having different hardness through the thin plate 4, and the thin plate 4 is shaped to a shape conforming to the tooth mold 1. In this case, the elastic bodies 2 and 3 are drawn, deformed into a form thinner toward the top along the shape of a recessed part 61 which is formed thinner toward the top in correspondence with the tooth mold 1, accompanying the downward movement of a drawing mold 6, and the whole of the thin plate 4 is applied with a uniform force, and precision molding can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding device for a dental prosthesis having a complicated shape such as a crown.

[0002]

2. Description of the Related Art Dental metal materials are known to have corrosion resistance and wear resistance, and to be compatible with the human body and compatible with Au.
Pt, PtAu, Ti, Ti alloys, FeCrNi, etc. are mainly used, and it is desired to develop a device for easily molding them for dentistry. Conventionally, the forming process is performed by pressing, but for example, the crown has an extremely complicated shape and the shape and size are small, so that press forming is not easy. The metal material is formed into a book plate having a thickness of about 0.02 to 1 mm, and an elastic material such as rubber is usually interposed for press molding using a tooth mold, and the dental material is interposed in the elastic material. It is performed to push the book board with a tooth mold. However, when the book plate is pushed into the elastic material by the tooth mold, the amount of elongation of the part pressed by the convex part of the tooth mold of the book plate is inevitably increased and the book plate cannot be stretched evenly There were many shortcomings that made holes.

[0003]

SUMMARY OF THE INVENTION According to the present invention, the pressure press using the elastic body is capable of being pressed precisely without causing breakage evenly acting on the entire dental book plate, and a precision molded product can be easily obtained. The purpose is to

[0004]

In a dental molding apparatus for press-molding a dental material plate sandwiched between an elastic body and a tooth mold, a drawing die for narrowing the elastic body into a tapered shape corresponding to the tooth mold. Is provided.

[0005]

In the present invention, the drawing die is provided as described above, whereby the elastic body is narrowed down to a tapered shape corresponding to the tooth shape, so that a local unreasonable force acts on the dental material book plate. It is possible to press evenly on the whole, and stable molding can be performed without breaking. Further, the drawing die only needs to be formed in a shape similar to a tooth die, and does not require the precision required in the conventional male and female dies, so that there is an effect that the press forming apparatus can be manufactured very easily and inexpensively.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. In FIG. 1, reference numeral 1 denotes a male mold having a required tooth shape, which is made of gypsum or the like and usually has a pressure resistance of about 50 kg / cm ² or more. Reference numeral 2 is an elastic body such as urethane rubber, and 3 is also an elastic body. Reference numeral 4 denotes a book plate of a dental material that is press-molded by being sandwiched between the tooth mold 1 and the elastic body 2, and is Au, Pt, PtAu, Ti, Ti.
Alloys (TiAlV, TiMg, etc.) FeCrNi, Fe
Co, FeCrCo or the like having a thickness of about 0.02 to 1 mm can be used. Reference numeral 5 is a rod for pressurizing and supporting the elastic bodies 2 and 3 from above, and 6 is a drawing type, which is connected to a scissor type hand press (not shown) or the like and pressed. The press recess 61 of the drawing die 6 is formed in a tapered shape so as to wrap the tooth mold 1 from the outside, and the tip portion 62 forms a straight cylindrical guide into which the elastic bodies 2 and 3 are fitted. The book plate 4 of the molded body is supported by. A punch 7 presses the tooth mold 1 when it is fixed, and is connected to the scissor-shaped hand press. Reference numeral 8 is a guide for a pressure punch, and a spring 1 for elastically supporting a wrinkle restraining member 9 between the guide 8 and the drawing die 6 is provided.
0 is provided.

[0007] The book plate 4 of the material to be pressed is inserted between the tooth mold and the elastic body 2 in a state where the periphery thereof is suppressed by the wrinkle suppressor 9, and the tooth mold 1 is driven by the pressure punch 7 to drive the book plate. 4 is pressed into the elastic bodies 2 and 3, and at this time, the elastic rubbers 2 and 3 are tapered corresponding to the tooth mold 1 along the shape surface of the recess 61 as the drawing die 6 is pressed down. It is narrowed while being deformed into, and gradually becomes a similar shape around the tooth mold 1 so that lateral pressure can be applied. Therefore, the book plate 4 of the body to be molded is not only pressed in one direction by the tooth mold 1, but also deformed and pressed by the elastic rubbers 2 and 3 so as to be squeezed from the side direction, and the force is evenly distributed as a whole. It works, and the force is not concentrated on one part like the conventional,
Accurate and stable press molding can be achieved without breaking and making holes. In addition, the elastic bodies 2 and 3 are pressed and held by the rod 5 in a state of being fitted to the drawing die 6,
The press forming process is performed as described above with the elastic force increased. Since the pressing pressure can be uniformly applied to the entire surface of the tooth mold 1, precision molding of a complex-shaped product such as a crown can be easily performed. The drawing die 6 may be formed in a tapered shape corresponding to the tooth die 1 as shown in the figure, and does not require a precision die such as a conventional male or female die, so that the die 6 can be manufactured. It's extremely easy.

FIG. 2 shows another embodiment in which a flange member 11 is screwed to a rod 5 which presses the elastic bodies 2 and 3 from above, and the diaphragm die 6 is elastically connected to the flange 11 via an elastic rubber 12. It is designed to be combined. According to this, the pressing force of the drawing die 6 is elastically applied, and the elastic deformation of the elastic bodies 2 and 3 is also performed very smoothly, so that the book plate 4 can be easily formed.

Although the present invention has been described with reference to one embodiment, an aggregate of synthetic resin particles other than rubber can be used as an elastic body in a flexible bag or container for use, or synthetic resin particles can be used. It is possible to pack and use a gel-like material in which is mixed with a fractional medium in a flexible container. In this case, the filling has a small elasticity, but like the rubber or the like, it is possible to press the entire surface of the mold 1, and this flexible deformable body is also included in the concept of an elastic body in the present invention. I shall. Further, although the pressurizing device is described as being hand-pressed, any means such as a cylinder press or a motor press can be used.

[0010]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, in forming a crown or the like in which a book plate of a dental material is sandwiched between a tooth mold and an elastic body and press-molded, a tapered shape is formed corresponding to the tooth mold. Since a drawing die is provided so that the elastic body can be tightened in a shape similar to the tooth die, it is possible to press the whole of the dental material evenly without applying excessive force locally. In addition, stable molding can be performed without breaking.
Further, the drawing die only needs to be formed in a tapered shape corresponding to the tooth die, and does not require the precision required in the conventional male and female dies, so that there is an effect that the press forming apparatus can be manufactured very easily and inexpensively.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Tooth die 2,3 Elastic rubber 4 Dental material book plate 5 Pressure rod 6 Drawing die 7 Pressure punch 8 Guide 9 Wrinkle suppression 10 Spring

Claims (1)

[Claims] 1. A dental molding apparatus for press-molding a dental material plate between an elastic body and a tooth mold, wherein a drawing die is provided for narrowing the elastic body into a tapered shape corresponding to the tooth mold. Dental molding device characterized by.