KR101900158B1 - Wax tree for water meter - Google Patents

Abstract

The present invention can simplify the assembling process by constructing the wax model assembly used for manufacturing the water meter using the roast wax casting method so that the product model portion can be fitted to the body portion, thereby simplifying the assembling process, The present invention relates to a wax model assembly for casting a water meter capable of improving the production efficiency of a product.
The present invention provides a wax model assembly for manufacturing a water meter using a roasted wax casting method. The wax model assembly includes a main body 100 having a plurality of rows 120 branched from one side of a sprue 110, ; A product model part 200 in which at least one gate 210 is integrally formed so as to be fitted on the outer circumferential surface of the blanket 120; And a hook part (300) insert-injected integrally into the sprue (110).

Description

Wax tree for water meter < RTI ID = 0.0 >

The present invention relates to a wax model assembly for casting a water meter and a method of manufacturing a water meter using the same. More particularly, the present invention relates to a wax model assembly for casting a water meter, and more particularly, to a wax model assembly for casting a water meter by using a wax casting method (a kind of precision casting process) The present invention relates to a roasting wax assembly for casting a water meter which can be efficiently produced by using a process.

Generally, the water meter is for checking the usage amount of the supplied water to charge a fee.

This water meter rotates the impeller provided in the inner shell of the water meter when the supplied water flows out through the inlet port of the water meter and moves the numerical plate interlocked with the rotating impeller, It is a structure that integrates.

The outer wall of the water meter as described above is mainly manufactured by using the roast wax casting method, and the manufacturing method has been heretofore filed as the registered patent No. 10-0683821.

The manufacturing process of the lower outer shell for the water meter using the roast wax casting method will be described with reference to FIGS. 1 and 2. FIG.

In order to manufacture a lower outer cover 1 for a water meter of a metal material as shown in FIG. 1, a mold of a wax model is first designed in a desired shape as shown in FIG. 2 (a).

The wax model is produced according to the design contents, but the wax model is divided into two parts for easy molding (see b).

(See C), and the slurry is deposited on the periphery of the wax model (see d) to cover the refractory (see e).

Thereafter, a dewaxing process is performed in which heat is applied to melt out the wax (see f), and a mold is formed through a firing process (see g).

After the mold is formed through the above process, a casting process (see h) for injecting molten metal into the mold is performed, and finally the finished product is completed after a predetermined finishing process (see i) is performed.

However, the above-described method has a problem that the production efficiency is lowered because one water meter product can be manufactured at a time.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a wax model assembly for manufacturing a water meter using a roast wax casting method, And it is an object of the present invention to provide a wax model assembly for casting a water meter capable of manufacturing a plurality of products at one time, thereby improving the production efficiency of the product.

In order to accomplish the above object, the present invention provides a wax model assembly for casting a water meter, comprising: a body portion having a plurality of rows of water lines branched at one side thereof; A product model part having at least one gate integrally formed so as to be fitted to the outer circumferential surface of the blanket; And a hook portion integrally insert-injected into the sprue.

The wax model assembly according to the present invention according to the present invention has a wax model assembly used for manufacturing a water meter using a roast wax casting method, So that the assembling process can be simplified.

Particularly, as in the prior art, the joining part of the product model part is melted by using a radiator such as a pharynx and then melted without attaching the joining part.

In addition, by combining a plurality of product model parts in one body part and casting a water meter, it is possible to improve the product production efficiency.

1 is a perspective view showing a lower outer shell for a general water meter,
FIG. 2 is a flow chart showing a process of manufacturing a lower outer shell for a water meter of FIG. 1 by using a cast wax casting method;
3 is a perspective view of a wax model assembly for casting a water meter according to the present invention,
FIG. 4 is an exploded perspective view of FIG. 3,
Figures 5A and 5B are side cross-sectional and partial detail views of Figure 3,
6A and 6B are side cross-sectional views of a mold and a mold for injection molding a body portion of a wax model assembly according to the present invention,
Figures 7 and 8 illustrate another embodiment of a product model part coupled to a wax model assembly according to the present invention,
9 is a photograph of an actual product of a wax model assembly according to the present invention,
10 is a photograph showing a state in which the slurry deposition process is performed on the outer peripheral surface of the wax model assembly according to the present invention,
11 is an exploded perspective view and an enlarged view showing an assembly structure of a product model part according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals as in the drawings denote the same elements in the drawings, unless they are indicated on other drawings.

FIG. 3 is a perspective view of a wax model assembly for casting a water meter according to the present invention, and FIG. 4 is an exploded perspective view of FIG.

Referring to FIG. 3, a wax model assembly 10 for casting a water meter according to a preferred embodiment of the present invention includes a body 100, a product model 200, and a hanger 300.

The configuration of the present invention will be described in detail as follows.

Referring to FIG. 4, the main body 100 is an induction furnace for guiding molten metal into a mold, and a plurality of blanks 120 are branched on one side of the sprue 110.

The spout 110 may have a cup shape whose inner diameter is gradually narrowed from the spout opening 111 toward the bout 120 to facilitate injection of the molten metal.

It is preferable that the tundes 120 are branched from the outlet of the spout 110 and are spaced apart in parallel with the central axis direction of the spout 110. At least one product model part 200 is coupled to the upper and lower surfaces of the sprue 110 so that a plurality of product model parts 200 can be cast at a time.

5A and 5B, a coupling protrusion 211 provided at an end of the gate 210 of the product model part 200 is coupled to the outer peripheral surface of the batt 120, A groove 121 is provided. In this case, the coupling protrusion 211 is formed at a step 213 at the end of the gate 210.

In other words, by setting the degree of engagement of the product model part 200 coupled to the conduit 120 to be the same, it is possible to simultaneously perform the finishing operation such as cutting the gate 210 after casting.

In this case, a connecting rod 123 (see FIG. 4) may be connected between the plurality of battens 120 so as to prevent the flow of the batt 120 and the coupled product model 200.

A pair of gas outlets 113 may be provided on the outer circumferential surface of the sprue 110 to be connected to both side edges of the sprue 120 with a predetermined angle inclination with respect to the sprue 110. That is, the mold is formed using the wax model assembly 10, and then the molten metal is injected into the sprue 110 to cast the product. At this time, the molten metal to be injected is heated at a high temperature of about 1650 ° C., and hot air and gas (hereinafter, referred to as "gas") are generated in the mold, and these gases can be discharged to the outside through the gas outlet 113. Therefore, it is possible to prevent the occurrence of bubbles during casting, thereby obtaining a cast product of good quality.

Meanwhile, the main body 100 having the above-described shape can be integrally molded through the mold shown in FIG. 6A through the insert 300 and the insert 300, which will be described later.

6B, the main body injection mold 130 includes a lower mold 131 having a first molding surface 131a formed on an opposite surface thereof to mold the body 100, a lower mold 131, And an upper mold 133 having a second molding surface 133a which is joined to an upper surface of the upper molding surface 131a and faces the first molding surface 131a.

The mold 130 is provided at one side thereof with a core 135 which forms an opening of the sprue 110 and fixes the sprue 300 to insert injection. A wax injection hole 137 is provided on the other side of the mold 130 so that molten wax can be injected into the mold 130.

Referring again to FIG. 5, the product model part 200 forms a mold for inducing and supplying molten metal through the sprue 110 and the sprue 120 to form a product to be manufactured. At least one gate 210 is integrally formed with the product model unit 200 so as to form a passage through which the molten metal is injected.

In this case, it is preferable that the gate 210 is provided at both ends of the product model part 200 so that the gate 210 can be easily cut off from the product after the casting process is completed.

Specifically, the gate 210 may be formed such that one side 210a of the gate 210 is rounded in a shape of 'A' along the longitudinal direction of the inlet 201 and the outlet 203 of the product model 200, respectively.

The gate 210 is protruded from the inlet 201 and the outlet 203 of the product model 200 and the gate 210 is moved along the neighboring direction of the product model 200 by using a cutter. It is possible to reduce the number of airflows by eliminating the need for a separate finishing process.

A coupling protrusion 211 is formed at the other side 210b of the gate 210 so as to be inserted into the coupling groove 121 provided at the outer peripheral surface of the batt 120 and inserted into the coupling groove 121, (See FIG. 5B), so that the molten metal supplied through the molten metal 120 can be smoothly introduced into the gate 210 at the time of casting.

The gate 210 may be further formed on the bottom center portion 205 of the product model portion 200 in addition to the inlet 201 and the outlet 203. [

7, in another embodiment, the gate 210 may be further formed on the upper rim 207 of the product model part 200 in addition to the inlet 201 and the outlet 203. Referring to FIG. That is, the gate 210 may be selectively formed on the bottom center portion 205 or on the top rim 207 depending on the direction in which the product model portion 200 is coupled.

Referring to FIG. 8, the gate 210 may be provided only at one of the inlet 201 and the outlet 203 of the product model 200 to facilitate finishing such as cutting after casting.

The hook portion 300 is formed integrally with the body portion 100 made of wax through insert injection. The hooking unit 300 smoothly performs slurry deposition (see FIG. 10) or refractory coating on the outer circumferential surface of the wax model assembly 10 (see FIG. 9) in the course of the roast wax casting process It is designed to be.

That is, the hook portion 300 is formed in an annular shape so that the operator can hold it by hand, or can easily hang it on a stand provided in the horizontal direction.

Specifically, the hooking part 300 is integrally formed by injection-molding one bolt head 311 in the main body part 100 and the other screw part 313 is disposed on the central axis line of the sprue 110, A hook member 320 which is screwed to the threaded portion 313 through a circular nut 321 and a bolt member 310 which is disposed such that an end of the threaded portion 313 is exposed to the outside of the spout opening 111, And a sprue cover 330 which is fixed on the hook 320 through a nut 331 to seal the sprue opening 111. [

In this case, the circular nut 321 serves to adjust the length of the hook 320.

Also, the sprue cover 330 prevents the slurry from flowing into the sprue 110 in the course of performing the slurry deposition process on the outer peripheral surface of the wax model assembly 10. It is preferable that the sprue cover 330 is formed of a metal material.

When the wax model assembly 10 for casting a water meter according to the present invention having the above-described structure is completed, a plurality of water meters made of a metal material can be manufactured through a roasting wax casting process as shown in FIG.

In particular, the present invention relates to a method of manufacturing a plurality of water meters using a roast wax casting method, wherein the product model part 200 is simply fitted into the body part 100 provided with the sprue 110 and the sprue 120 The assembly process can be simplified.

In other words, as in the prior art, the joining portion of the product model portion is melted by using a radiator such as a pharynx and then melted without attaching to the body portion.

In addition, by combining a plurality of product model parts 200 with one body part 100, it is possible to cast a water meter, thereby improving the production efficiency of products.

11, in the present invention, the product model part 200 is injection-molded in a half-divided shape, and the fitting part 215 of the engraved surface 215a and the embossed part 215b is formed on the joint surface, May be formed so as to be able to be coupled with each other. Therefore, it is possible to easily engage the divided product model part 200 without using a separate high-frequency adhesive process, thereby improving the assembling efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

Particularly, in the present invention, three and a half of the product model units 200 are coupled to the upper and lower surfaces of the main body 100, respectively. However, the present invention is not limited thereto. Can be applied.

10: wax model assembly 100:
110: Tanggu 111: Tanggu opening
113: gas exhaust port 120:
121: coupling groove 123: connecting rod
130: main body injection mold 131: lower mold
133: upper mold 135: core
137: Wax injection hole 200: Product model part
201: inlet 203: outlet
205: bottom center portion 207: upper rim
210: gate 211: engaging projection
213: step 231:
215a: Embossing 215b: Embossing
300: hook portion 310: bolt member
311: Bolt head 313:
320: Hook 321: Round nut
330: Spanner cover 331: Nut

Claims (8)

A wax model assembly for making a water meter using a roast wax casting method,
A plurality of blanks 120 are provided on one side of the sprue 110. In order to prevent the generation of bubbles in the mold during casting, A main body 100 having a pair of gas outlets 113 connected to both side edges of the blanket 120 in a straight line at predetermined angles;
A product model part 200 in which at least one gate 210 is integrally formed so as to be fitted on the outer circumferential surface of the blanket 120; And
And a hook part (300) insert-injected integrally into the sprue (110)
The hooking portion 300 includes:
And a threaded portion 313 on the other side is disposed on the central axis line of the sprue 110 and has an end connected to the sprue opening 111 A bolt member 310 disposed to be exposed to the outside, a hook-shaped hook 320 screwed to the screw portion 313 through a circular nut 321, 331) for closing the spout opening (111), and a spout cover (330) fixed through the spout opening (331) to seal the spout opening (111).
The method according to claim 1,
The sprue (110)
Further comprising a cup-like shape whose inner diameter gradually becomes narrower from the spout opening (111) toward the spout (120) side.
3. The method of claim 2,
The blanket (120)
Further comprising a plurality of branches formed at an outlet side of the spout (110) and spaced apart in parallel to a central axis direction of the spout (110).
The method of claim 3,
Between the plurality of bathtubs 120,
Further comprising a connecting rod (123) connected to prevent the flow of the bathtub (120) and the product model part (200).
The method according to claim 1,
The gate (210)
One side 210a of the product model part 200 is formed to be roundly protruded along the longitudinal direction of the inlet 201 and the outlet 203 of the product model part 200 so that the gate 210 Further comprising a cutter to cut and cut in a row in a row along a neighboring direction of the product model unit (200).
6. The method according to claim 1 or 5,
On the other side 210b of the gate 210,
An engaging protrusion 211 is formed so as to be engaged with the engaging groove 121 provided on the outer circumferential surface of the bellows 120 with a predetermined depth and the outer circumference of the step 213 is inclined in a hopper shape Such that the molten metal supplied through the molten metal conduit 120 during the casting process can flow smoothly into the gates 210. The method of claim 1,
The method according to claim 6,
The gate (210)
Further comprising: a bottom surface central portion (205) or top edge (207) of the product model portion (200).
The method according to claim 1,
The product model unit (200)
The wax model assembly for water casting further comprising injection molding each of the wax mold assembly in half divided shape so that the engaging surface of the wax mold assembly can be engageable with the engaging portion 215 of the engaging portion 215a and the boss 215b. .

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