JPH10318702A - Wear marker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wear marker by which the wear amount of a master mold used in a sand-type casting operation can be measured easily. SOLUTION: A shallow recessed part 3 is formed on the surface of a master mold 1 which is used in a sand-type casting operation. A wear-resistant resin plate 4 is fitted to the recessed part 3. The master mold 1 is connected smoothly to the surface of the wear-resistant resin plate 4. After the use of the master mold 1, the master mold 1 and the surface of the wear-resistant resin plate 4 are worn out. When the wear-resistant resin plate 4 is removed, it is detected that the recessed part 3 becomes shallower than its initial depth, or the wear- resistant resin plate 4 is worn out so as to disappear together with the recessed part 3. As a result, the wear amount on the surface of the master mold 1 is measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marker for measuring a wear amount of a prototype used for sand casting.

[0002]

2. Description of the Related Art In sand casting, the material of a mold used for molding a sand mold is appropriately selected from cast iron, resin, timber, etc. in consideration of production volume and the like. The workability of the prototype is emphasized, and the wear resistance of the prototype is usually relatively unconsidered. However, what was originally planned for small-lot production may shift to high-volume production, and the conditions of use of the prototype may be changed.In addition, since the wear of the prototype progresses little by little, it is generally discovered. Difficult, therefore, it is necessary to manage the wear limit of the prototype by periodically measuring the prototype, but conventionally, a skilled worker must measure the wear amount of the prototype by a three-dimensional measuring machine, It was actually very difficult to control the wear amount of various types of prototypes in terms of cost and man-hours.

On the other hand, cast iron products are relatively heavy, so that their thickness and weight are reduced, and the thickness of cast iron products tends to approach the strength limit. Large and prototype wear control has become an even more important issue.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily measure the wear amount of a mold used for sand casting.

[0005]

Therefore, a wear marker according to the present invention has a concave portion formed on the surface of a mold used for sand mold casting, and a wear-resistant material is fitted into the concave portion to form the mold. The surface and the surface of the material are connected smoothly.

Accordingly, when the surface of the master is worn by the use of the master, the surface of the abrasion-resistant material fitted into the recess of the surface of the master is also worn accordingly, and the surfaces of both are always smoothly continuous. Therefore, the difference between the initial depth in the concave portion and the depth when the wear-resistant material is removed from the concave portion indicates the amount of wear on the prototype surface. Reaches the initial depth in the recess and all of the wear-resistant material has worn away and disappears with the recess, indicating that the original surface has been worn by the initial depth in the recess.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention shown in the drawings will be described below. In FIG. 1 and FIG. 2, when a prototype 1 used for sand casting is completed, a portion 2 having a shallow depth t is empirically found in a portion 2 of the surface where wear progresses relatively quickly. The recess 3 is engraved, and a wear-resistant resin plate 4 having the same thickness t is fitted into the recess 3 and is attached so as to be relatively easily attached and detached. The surface of the plate 4 is smoothly connected. The depth t of the recess 3 is, for example, 0.5 m.
m and a wear-resistant resin plate 4
Is different from the surface of the prototype 1 in color, color density, pattern, and the like.

[0008] The prototype 1 is used for sand mold casting.
Of the abrasion-resistant resin plate 4 fitted in the recess 3, the surface of the abrasion-resistant resin plate 4 is similarly worn, and the surfaces of the two are always smoothly continuous.
Of the wear-resistant resin plate 4 from the initial depth t
The difference from the depth when the mold is removed indicates the amount of wear on the surface of the portion 2 of the mold 1. When the amount of wear on the surface of the portion 2 reaches t as the wear of the surface of the mold 1 progresses, the concave portion is formed. 3 and the wear-resistant resin plate 4 will both disappear.

Therefore, when the wear-resistant resin plate 4 is removed from the concave portion 3 of the prototype 1 during the regular measurement of the prototype 1, the depth of the concave portion 3 at that time can be visually read, or a simple measuring instrument can be used. By using and accurately measuring the depth of the concave portion 3 at that time, the amount of wear on the surface of the portion 2 of the prototype 1 can be measured easily, at low cost, and in a short time.

Since the wear-resistant resin plate 4 is different in color, color density, pattern, etc. from the surface of the prototype 1, the wear-resistant resin plate 4 on the surface of the portion 2 of the prototype 1 is used. Disappears, the wear amount on the surface of the prototype 1 can reach the thickness t very easily by visual observation at any time, so that the wear of the prototype 1 can be quickly and appropriately managed. It is very convenient.

[0011] When the concave portion on the surface of the prototype is formed in a portion corresponding to the surface of a product cast by the prototype,
The wear amount of the part corresponding to the product surface can be directly measured, but it should be formed on the part corresponding to the periphery of the above product, such as the mating surface of sand mold, so that there is no influence on the product at all. It goes without saying that this may be done.

The thickness of the abrasion-resistant material to be fitted into the concave portion on the surface of the prototype is determined by, for example, stacking a plurality of abrasion-resistant films having different colors, color densities, and patterns. If the abrasion-resistant material is worn from the surface together with the original surface if the color, the density of the color, the pattern, etc. change in the direction, the color, the density of the color, the pattern, etc. of the surface of the abrasion-resistant material are changed. Since it changes according to the amount of wear, the amount of wear on the prototype surface can be immediately determined visually by the discrimination change, and there is a great advantage that the measurement of the amount of wear is very simple.

[0013]

According to the wear marker of the present invention,
When the surface of the prototype is worn due to the use of the prototype, the difference between the depth of the recess originally formed on the prototype surface and the depth when the wear-resistant material is removed from the recess, or the wear-resistant material in the recess is worn. When it disappears, the prototype surface is worn down by the initial depth in the recess, and the amount of wear can be measured easily and accurately at all times. Become
Very convenient in practice.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is an enlarged longitudinal sectional view of a main part of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Prototype 3 Concave part 4 Wear-resistant resin plate

Claims (2)

[Claims] 1. A wear marker in which a concave portion is formed on the surface of a mold used for sand casting, a wear-resistant material is fitted into the concave portion, and the surface of the mold and the surface of the material are smoothly connected. 2. The wear marker according to claim 1, wherein the material is provided with an identification change in the thickness direction.