JPS6344458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of displaying codes, etc. on a casting mold.

(Prior art) When a mold for casting is manufactured and used to produce a large quantity of castings, it is important to know which mold was used to produce the castings, and in what year and month. It is important from the viewpoint of quality control and production control to check and investigate the ranking of products in terms of the number of products produced.

For this reason, it has been conventional practice to display model numbers, manufacturing dates, product numbers, etc. on products. As a display method, stamping tape is attached to the product to display characters for identification, or stamping is made on the mold.

However, with this display method, different characters must be molded and stamped on the mold each time, so the manufacturing process is labor-intensive and complicated.

In addition, when it is necessary to cast serial numbers on customer specifications such as freight car bogie parts, etc., Utility Model No. 53-83507 was used as a means to cast serial numbers on these cast products using a serial number casting tool. There is a simple number casting model replacement tool as shown in the publication. This is done by setting the number casting model that is the original model to the required number of digits,
This is related to a simple number casting model replacement tool that allows the digits to be replaced for each molding, but it is necessary to prepare a large number of number digits and to replace the necessary digits. There are drawbacks.

(Problems to be Solved by the Invention) The prior art has various problems as described above. The present invention solves the above-mentioned problems by using a display method that involves simple modification such as removing part of the common number formed on the sand mold made from the original model or embedding part of the part. It is something to do.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides common codes, symbols, or figures that are subject to modifications and changes in specific codes, symbols, or drawings in the process of subsequent sand mold production. (hereinafter referred to as "codes, etc.") is formed on a master pattern made of metal, wood, or resin, and a large number of sand molds are manufactured using this master pattern, and a common pattern formed on the surface of this sand mold is created. For casting, a sand mold is used to cast a mold by forming a predetermined code, etc. by applying correction means such as removing or embedding a part of the code, etc. The structure consists of a method of displaying codes, etc. on the mold.

(Operation) A common code, etc. is formed on an original model, a large number of sand molds are made using this original model, and a part of the flesh is scraped off from the common code, etc. formed on this sand mold,
Different specific codes, etc. are formed in the sand mold by partially embedding meat into the code, etc., so if the mold is cast using this sand mold, the code, etc. can be easily displayed on the casting mold. be able to.

(Example) The present invention will be explained below using examples.

As shown in FIG. 1, a porcelain 2 and a cap 1 connecting the same are used as a device for insulating between power transmission lines, distribution lines, and steel towers. This pair of instruments is used by being appropriately connected by pins 4 and recesses 5. When manufacturing this cap 1 by casting, a mold 6 as shown in FIG. 2 is used. Note that 7 indicates the casting of the cap 1, and 8 and 9 are cores to be housed in the mold 6, respectively.

If a symbol etc. is to be displayed on the cap 1 having such a shape, the appropriate position is on the sloped surface 3 above the skirt portion 14 of the cap 1, but in order to carry out the method of the present invention here, for example, as shown in FIG. Take the order shown in . That is, as shown in A, first, a pattern as shown in FIG. 4 is formed as a shallow groove on the inner surface of the original model 11 as a common reference numeral 12, and this is used as a female mold to produce the sand mold 10, and the same shape is formed on the outer surface of the sand mold 10. The figure is formed as a thin protrusion. Here sand mold 10
A part of the thin protrusion formed on the outer surface of the plate is removed to form a number, for example, ``365'' as shown in FIG. FIG. 3B shows the sand mold 10 after being scraped.

Next, this sand mold 10 is used as a male mold for a casting mold 6.
The number "365" is formed as a shallow groove on the inner surface of the mold 6 as shown in C. Finally, when a cap for an insulator is cast using this mold 6 as a female mold, the predetermined number "365" is formed as a thin protrusion on the outer surface of the casting 7, as shown in D. That is, in FIG. 1, the numeral ``365'' shaped like a square is formed as a protrusion like a ridge at the position of the inclined portion 3 of the cap 1.

In Fig. 3, both the groove and the protrusion are drawn slightly larger than their actual dimensions for the sake of explanation, but in reality, the groove in the original model 11 is very shallow and is located at a position corresponding to the slope 3 of the insulator cap 1. Therefore, the protrusions of the sand mold 10 are formed to be very thin, and the irregularities numbered 12 or 13 are molded in order from the original model 11 → the sand mold 10 → the mold 6 → the casting 7. It will not be a problem above.

In the above embodiment, the case where a shallow groove was formed in the original model 11 was explained, but a thin protrusion may be formed instead of the groove. Embedded specific code, etc. 1
3 should be formed.

Also, if the common symbol etc. is a figure like a sun,
Not only can the numbers from 0 to 9 be formed very easily by removing or embedding some of the ridges or grooves formed by this figure. By combining an appropriate number of these figures, numbers with large numbers of digits can be easily displayed.

〔Effect of the invention〕

According to the display method of the present invention, there is no need to create or replace codes each time as in the past;
Since a predetermined symbol etc. can be formed by filling the recess with meat, the work is extremely easy. Further, even if the number of combinations increases or decreases, it can be easily accommodated.

Furthermore, if the present invention is used, when making a common symbol formed on the original model into a convex shape, it is possible to leave the necessary parts and cut off the unnecessary parts after manufacturing the mold. can do.

[Brief explanation of drawings]

Figure 1 shows the structure of a pair of insulators and metal fittings used to insulate between power transmission lines, distribution lines, and steel towers, and the state of the cap displayed by the present invention. 2 is a vertical sectional view of the casting showing the state of the mold to which the indication according to the present invention is attached and the core housed therein;
The figure is a sectional view of the parts such as codes formed on the original model, sand mold, metal mold, and casting display in each process A to D in which the display method according to the present invention is carried out. FIG. 5 is an explanatory diagram showing an example of common codes etc. formed on the sand mold. 6...Mold, 10...Sand mold, 11...Original model,
12...Common code, etc., 13...Specific code, etc.

Claims (1)

[Claims] 1. A common code, symbol, or figure that can be changed to a specific code, symbol, or figure in the process of subsequent sand mold production is formed on an original model, and a large number of sand molds are manufactured using this original model. However, by modifying the common code, symbol or figure formed in this sand mold by removing part of the flesh or embedding part of the flesh, specific codes, symbols or figures that are different from each other can be created. 1. A method for displaying codes, etc. on casting molds, characterized in that a symbol is formed in each sand mold, and a mold is cast using the sand molds. 2. The method for displaying codes, etc. on casting molds according to claim 1, wherein the common code, symbol or figure is a date.