JP3009688U - Instrument for burying mold - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a burial tool that can create a smooth casting port in a burial operation of a mold and can easily prevent bubbles from entering the mold material. [Structure] The sheet 3 is made of styrene resin having elasticity and is formed so as to cover the casting molding portion 10 of the rubber truncated cone 6 perfectly and to press the edge at the lower end of the mold frame 1. is there. The tightening ring 4 is provided in a conical shape on the outer peripheral concave portion of the mold frame holding part 5 of the truncated cone 6, and the structure is such that the mold frame holding part 5 is tightened by pinching the handle 13 and applying the clasp 12. ing. [Effect] If the rubber truncated cone 6 with the tightening ring 4 and the sheet 3 are used for the mold burying operation, a smooth casting port can be obtained and it is possible to easily prevent air bubbles from entering the mold material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus used for burying a mold in a lost-wax precision casting method such as dental casting. Specifically, it smoothly hardens the surface of the casting port and prevents bubbles from entering from the bottom of the mold frame. It relates to a truncated cone that can be fitted with a sheet for preventing it and a clamp ring for preventing the mold frame from rising.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, burying a mold according to the configuration shown in FIG. 2 has been mainly performed. First, a wax mold 8 is erected on a conventional truncated cone 11 filled with paraffin wax 9 in a wax mold arranging recess 2 to form a mold material. The mold frame 1 lined with the expansion buffer zone 7 is provided on the conventional truncated cone 11, and the kneaded mold material is poured into the mold frame 1 while vibrating, and after the mold material is hardened, the conventional truncated cone 11 is removed. I was making a casting mold.

[0003]

[Problems to be solved by the device]

 Since the hardened casting material sticks to the casting mouth molding portion 10 of the conventional truncated cone 11, the surface of the casting mouth of the casting mold becomes rough, which is a cause of the generation of porosity and casting defects.

Further, when the mold frame 1 floats from the conventional truncated cone 11, air bubbles infiltrate into the mold material, and the bubbles adhere to the wax mold 8, resulting in incompatibility.

The present invention has been made in order to eliminate these drawbacks. The purpose of the present invention is to make it possible to create a smooth pouring port when burying a mold, and to easily introduce air bubbles into a casting material. It is intended to provide an implantable device that can prevent

[0006]

[Means for Solving the Problems] In order to achieve the above object, as shown in FIGS. added.

By the way, the above-mentioned sheet 3 is made of styrene resin having elasticity, and covers the casting molding portion 10 of the conical base 6 made of rubber so that the sheet 3 fits tightly and the edge is pressed at the lower end of the mold frame 1. It is molded into.

Further, the tightening ring 4 is installed in a concave shape on the outer peripheral concave portion of the mold frame holding portion 5 of the truncated cone 6, and by gripping the handle 13 and applying the clasp 12, the mold frame holding portion 5 is It has a structure that can be tightened.

[0009]

[Action]

 Since the sheet 3 is used by attaching a new one to the truncated cone 6 each time it is buried, it is possible to finish the surface of the casting mold material smoothly.

Further, since the sheet 3 is made of an elastic material, the edges of the sheet 3 are pressed and sandwiched between the lower end of the mold frame 1 and the truncated cone 6 to cause bubbles in the mold material. Can stop the intrusion.

Further, by gripping the handle 13 of the tightening ring 4 and applying the clasp 12, the mold frame holding portion 5 is clamped, the mold frame 1 is firmly fixed to the truncated cone 6, and the action of the sheet 3 described above is achieved. Can be easily maintained.

[0012]

【Example】

 An example will be described with reference to FIGS. Before the wax mold 8 is planted in the wax mold planting recess 2, the elastic styrene resin sheet 3 is attached so as to cover the casting part 10 of the rubber truncated cone 6 exactly. After the wax mold 8 is filled by filling the paraffin wax 9 in the wax mold planting concave portion 2, the mold frame 1 lined with the expansion buffer zone 7 is fitted into the truncated cone 6, and the edge of the sheet 3 is the lower end of the mold frame 1. While holding down the mold frame 1 with one hand so that it is pressed and pressed with, press the clamping ring 4 installed in the outer peripheral recess of the mold frame holding part 5 of the rubber truncated cone 6 in the shape of a headband. The clasp 12 is applied to complete the preparation for burying the mold.

[0013]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

By using the tool of claim 1, the kneaded mold material is always brought into contact with the new and smooth molding surface of the mold and hardened, so that the surface of the molding hole of the mold can be made dense.

By using the device according to claim 2, it is possible to keep the edge of the sheet in a pressed state and at the same time, to keep the mold frame firmly fixed to the frusto-conical body, and to prevent vibration during the burial operation. It is possible to prevent the mold frame from falling off and rising, and prevent bubbles from entering.

By using the device of claim 3, the tightening ring can be always fitted to the outer periphery of the mold frame tightening portion of the truncated cone so that the mold frame can be quickly tightened and fixed after mounting, and after use. Maintenance of will be easier.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a combined use example of the implantable device of the present invention.

FIG. 2 is a sectional view of an essential part of a combined use example of a conventional burial device.

FIG. 3 is a perspective view of a cylindrical tubular mold frame.

FIG. 4 is a perspective view of a sheet for preventing a bubble from entering and updating a casting port.

FIG. 5 is a perspective view of a truncated cone to which a seat and a tightening ring can be attached.

FIG. 6 is a perspective view of a tightening ring.

FIG. 7 is a perspective view of a mold frame lined with an expansion buffer band.

FIG. 8 is a perspective view of the device of the present invention in which preparation for burial is completed.

FIG. 9 is a perspective view of the device of the present invention after wax-type planting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold frame 2 Wax type planting recessed part 3 Sheet 4 Tightening ring 5 Mold frame holding part 6 Cone cone 7 Expansion buffer zone 8 Wax type 9 Paraffin wax 10 Casting mouth shaping part 11 Conventional type truncated cone 12 Clasp 13 Handle

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[Procedure amendment]

[Submission date] October 22, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (3)

[Scope of utility model registration request] 1. A sheet (3) for smoothly hardening the surface of the casting opening of the mold and for closely contacting with the lower end of the mold frame (1) to prevent air bubbles from entering. 2. Clamping ring (4) for preventing the mold frame (1) from rising. 3. A truncated cone (6) adapted to be fitted with a seat (3) and a fastening ring (4).