KR101675811B1 - One-piece mold reproduction process - Google Patents

Abstract

The present invention relates to an integrated-type mold reproduction method and, more specifically, relates to a reproduction method of reusing a continuous-casting mold of which an inner surface is worn due to a continuous casting process. The integrated-type mold reproduction method comprises: (a) step of separating a plated layer of an inner surface unit of the continuous-casting mold; (b) a step of buffing the inner surface unit of the continuous-casting mold after separating the plated layer; (c) a step of generating and growing a plated layer on a worn part of the continuous-casting mold after buffing; (d) a step of forming an inner surface layer by machining the plated layer grown on the inner surface unit of the continuous-casting mold; (e) a step of plating the inner surface layer to form an inner surface plated layer after forming the inner surface layer through step (d); and (f) a step of polishing the inner surface unit and an outer surface unit of continuous-casting mold after forming the inner surface plating unit through step (e). Namely, the present invention is to present the integrated-type mold reproduction method capable of reproducing the continuous-casting mold by growing the plated layer on the worn part formed on a lower part of the inner surface unit of the continuous-casting mold when integrally using the continuous-casting mold manufactured for a predetermined period; thereby improving economic efficiency by reusing the expensive mold. In addition, the integrated-type mold reproduction method is capable of maintaining an accuracy of a mold size, thereby improving a casting quality.

Description

{ONE-PIECE MOLD REPRODUCTION PROCESS}

The present invention can increase the economic efficiency by reusing expensive molds by cultivating and regenerating a plating layer on a wear region formed under the inner surface portion of the mold when the performance mold manufactured as an integral type is used for a certain period, The present invention relates to a method of regenerating an integral mold capable of maintaining the accuracy and improving the casting quality.

In general, an integral type casting mold causes continuous products to be produced in a constant size while solidifying the dough during continuous casting. When the dough is used for a predetermined period, a wear part is formed in the lower part of the inner circumferential surface.

In such a case, conventionally, when used in continuous casting operation, the casting is discarded after a certain period of use and replaced with a new performance mold. However, there is a problem in that the production cost of the product and the maintenance cost of the product increase during production of the product by continuous casting, there was.

Therefore, in order to solve the conventional problem, a reproduction method for reproducing and using the performance mold has been developed.

A regeneration method of a performance mold through a press facility, an extrusion molding process, and a machining process in the regeneration process of such a performance mold is disclosed by Korean Patent Registration No. 10-1254710 (hereinafter referred to as "prior art") have.

The above-mentioned prior art discloses a method of manufacturing a tube mold, which comprises a plating peeling step of peeling a plating layer of a tube mold in which a worn portion is formed, an inner and outer diameter fusing step of grinding the tube mold in which the plating layer is peeled off, a step of inserting the mandrel into the tube mold, A tube mold press-molding step for removing the worn portion formed in the tube mold by pressure molding using a forming roll, a tube mold having an increased length compared to the length and outer diameter dimensions of the tube mold during designing by the tube mold press- A tube cutting process step for cutting and processing the lower end of the tube mold, an inner diameter laying operation step for grinding the inner circumferential surface of the tube mold, and a plating layer formed on the inner circumferential surface of the tube mold lower end portion or the upper end portion for cultivating the O- And an outer diameter mapping work step of grinding the outer circumferential surface of the tube mold.

According to the conventional structure thus configured, the upper and lower portions of the tube mold having the O-ring are not press-formed, and the outer diameter raising operation performed when the press-molding is performed can be omitted, thereby reducing the cost.

Particularly, a method of regenerating a mold by press-forming a tube mold as in the prior art is a method of regenerating the tube mold by press molding with a forming roll.

That is, in the prior art, in order to remove a wear part of the tube mold, the mandrel is inserted into the inner surface of the tube mold, and then the outer surface of the tube mold is press-formed by using a forming roll. In this case, There is a problem that the surface of the outer surface portion is damaged.

In addition, when a damage occurs to the outer surface of the tube mold, a process for treating the damage is required, and the production cost is increased.

Particularly, in order to carry out the abrasion of the tube mold through the press forming by the forming roll, the tube mold is compressed to adjust the dimension of the mohair portion. In this case, the abrasion portion of the tube mold is deformed do.

There is a problem that it is difficult to ensure the dimensional accuracy of the inner surface of the mold through such a deformation, and there is also a problem that it is difficult to precisely process the dimension of the radius formed at a specific portion of the tube mold.

Accordingly, there is a desperate need to develop a reclaiming method that can simplify the production cost and the manufacturing process while solving the above-mentioned conventional problems.

Patent Document: Korean Patent No. 10-1254710 (Feb.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

When a performance mold made of an integral type is used for a certain period of time, it is possible to reuse an expensive mold by cultivating and regenerating a plating layer at a wear portion formed under the inner surface of the mold, thereby improving the economical efficiency and at the same time maintaining the dimensional accuracy of the mold Thereby improving the casting quality.

Since the round portion of a certain gradient formed in the performance mold can be disappeared or deformed by the process of growing the plating layer on the wear portion, the plating layer is fired at the wear portion and then the inner surface portion of the performance mold is machined To set the dimensions of the inner surface portion and the round portion of the performance mold within the tolerance range, thereby increasing the dimensional accuracy and ensuring the machining reliability.

The reclaiming method of the integral mold according to the present invention is a reclaiming method for reusing a performance mold in which an inner surface is worn due to continuous casting, comprising the steps of: (a) peeling the inner surface side plating layer of the performance mold; (b) buffing the inner surface portion of the performance mold after peeling off the plating layer; (c) after the buffing, applying a plating solution to a wear part of the performance mold to grow a plating layer; (d) machining the plating layer grown on the inner surface of the performance mold to form an inner surface layer; (e) forming an inner surface layer by the step (d), and then plating the inner surface layer to form an inner surface plated layer; And (f) finishing the inner and outer surfaces of the performance mold after forming the inner surface plating layer by the step (e).

(D-1) for reproducing the round portion R having a predetermined gradient in the performance mold M at the time of machining the inner surface portion of the performance mold M after the step (d) (S400) ) Step (S410).

The plating layer (P) according to the present invention is characterized by being formed through copper plating or nickel alloy plating.

The inner surface plating layer (IP) according to the present invention is formed through nickel alloy plating.

In the reclaiming method of the integrated mold according to the present invention, when a performance mold manufactured as an integral type is used for a certain period of time, the plating layer is grown and regenerated at the abrasion portion formed under the inner surface portion of the mold so that the expensive mold can be reused, At the same time, the dimensional accuracy of the mold can be maintained and the casting quality can be improved.

In addition, since the round portion of a certain gradient formed in the performance mold may disappear or be deformed by the process of growing the plating layer on the wear portion, the plating layer may be formed on the wear portion and then the inner surface portion of the performance mold may be precisely The dimensions of the inner surface portion and the round portion of the performance mold are set within the tolerance range, thereby increasing the dimensional accuracy and ensuring the machining reliability.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart showing a reproducing method of an integral mold according to the present invention,
2 is a conceptual view showing a wear part of a performance mold according to the present invention,
3 is a process chart showing a regenerating method of an integral mold according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for reproducing an integral mold according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the method of reproducing a monolithic mold according to the present invention includes the steps of: (a) separating the inner surface plating layer P of the performance mold M; (C) a step (S300) of growing a plating layer (P) by forming a plating layer (P) on a wear region (AP) of the performance mold (M) A step (S400) of forming an inner surface layer by machining the plating layer (P), a step (S500) of forming an inner surface plating layer (IP) by plating an inner surface layer of the performance mold (M) (F) (S600) of finishing the inner and outer surfaces of the playing mold (M).

First, during the continuous casting, the casting mold M produces a continuous casting product with a uniform size while solidifying the casting product. When the casting mold M is used for a certain period of time, the inner surface of the casting mold M is worn.

In order to reproduce and use the performance mold M, the abrasion area AP under the inner surface of the performance mold M is restored to the original dimensions because the abrasion occurs prominently at the lower end of the inner surface of the performance mold M. [ Therefore, the process for reproducing the abrasion area AP of the performance mold M will be sequentially described below.

As shown in FIGS. 1 to 3, step (a) of step (S100) of the regeneration method according to the present invention is a step of peeling the inner surface plating layer of the performance mold M.

That is, since the base material of the playing mold M is made of a copper plate, in order to protect the copper plate as a base material, a plating layer is formed on the inner surface of the performance mold M by chromium plating or other plating, It is necessary to peel off the inner surface plating layer in order to regenerate the magnetic recording medium M.

Therefore, it is preferable to immerse the performance mold (M) in a chemical agent such as a hydrochloric acid liquid to peel off the plating layer.

As shown in FIGS. 1 to 3, step (b) S200 of the regenerating method according to the present invention separates the original inner surface plating layer of the inner surface of the playing mold M and then buffers the inner surface of the playing mold M, Process.

That is, step (b) S200 according to the present invention removes foreign matter remaining on the inner surface of the playing mold M in order to increase the bonding strength of the plating layer P when forming the plating layer P to be performed in the subsequent step And to improve the surface roughness of the inner surface portion by removing scratches and the like of the abrasion portion AP.

As shown in FIGS. 1 to 3, step (c) S300 of the regenerating method according to the present invention is performed after the buffing process of step (S200) And a plating layer P is formed to grow the plating layer P.

When the continuous casting is first performed using the performance mold M, friction occurs due to solidification of the molten light in the inner surface of the performance mold M. The wear of the inner surface of the performance mold M, .

This wear reduces the quality of the castings by changing the taper ratio and increases the dimension of the inner surface of the playing mold M so that the mold is expired in the past, And is reproduced and used by a conventional method.

However, it is economically very inefficient to dispose of the performance mold M worn out by the casting operation as in the prior art, and the regeneration method by the pressure molding method using the molding roll, which is a regeneration system according to the conventional system, There is a problem of breakage due to the deformation of the mold M and a problem of increasing the production cost.

Accordingly, the present invention solves the conventional problems as described above by cultivating the plating layer P on the hot spot AP of the performance mold in step (c) (S300).

To this end, the abrasion area AP of the playing mold M is coated with a plating liquid such as a plating layer, that is, copper or a nickel alloy, and is raised to form a plating layer P.

In this case, it is preferable that the plated layer P is grown to 1.5 to 3 mm.

In other words, according to the present invention, the plating layer P is fired on the wear area AP of the performance mold M, and thereby the surface damage of the outer face portion generated in the method of regenerating the wear area AP by press molding with the conventional molding roll It is possible not only to prevent deformation of the performance mold M but also to keep the thickness of the performance mold M, that is, the thickness of the copper plate as a base material, uniform.

In this case, the plating layer (P) is preferably copper-plated so as to maintain the same material characteristics as the copper plate as the base material. In this case, the bonding strength between the base metal and the copper plating layer is improved by the characteristics of the same material, As well.

When the plating layer P is formed of nickel alloy plating, it is preferable to determine the thickness of the plating layer P in consideration of the thermal conductivity.

(D) step (S400) of increasing the dimensional accuracy of the inner surface of the playing mold (M) by machining after step (c) (S300) according to the present invention as shown in FIG. 1 .

In this case, roundness R having a predetermined gradient is formed in the performance mold M, (c) when the plating layer P is to be formed on the wear region AP of the performance mold M in step S300 Since the round portion R is lost or changed, it is restored by machining. In the next step, a plating layer is formed on the entire inner surface of the playing mold M to form the inner surface plating layer IP It is necessary to precisely match the dimension of the inner surface of the playing mold M. [

Therefore, in the present invention, during the machining according to (d) S400, (d-1) and (S410) are added to reproduce the round portion R through the precision machining of the inner surface portion of the performance mold M It is preferable that the inner surface portion is machined within the dimensional tolerance and the dimension of the inner surface portion of the performance mold M is made more precise to more effectively manage the dimension.

At this time, various types of equipment can be used for precision machining, and it is possible to introduce various types of processing equipment such as grinding apparatus.

As shown in FIGS. 1 to 3, step (e) (S500) of the reproducing method according to the present invention is a step of forming a plating layer on the entire inner surface of the playing mold M to form the inner surface coating layer IP.

That is, step (e) S500 according to the present invention is performed by following steps (d), (S400) and (d-1) A plating layer is formed on the entire inner surface of the playing mold M to form the inner surface coating layer IP.

The inner surface plated layer IP formed by step (e) (S500) is for improving the abrasion resistance of the playing mold M and can be selected according to the type of the mold.

In this case, when the inner surface plating layer IP is made of nickel alloy plating, the thickness of the nickel alloy plating is preferably 0.1 mm to 0.5 mm (t), and the hardness of the plating layer P is preferably Hv 700 or more.

In this case, it is important to select a plating with less stress on the inner plating layer (IP), so that it is preferable that the inner plating layer (IP) can reduce stress through nickel alloy plating.

As shown in FIGS. 1 to 3, step (f) S600 of the regenerating method according to the present invention includes forming the inner surface plating layer IP according to (e) step S500, The inner and outer surfaces are subjected to the finishing process.

That is, if the dimensions of the inner surface of the performance mold M for reproduction are completed through the process of steps (a) to (e) as described above, (f) Is completed, the playing of the performance mold M is completed.

Therefore, it is preferable that the inner surface of the performance mold is finely processed through step (f) (S600) to ensure the surface roughness of the inner surface to thereby produce more precise castings, thereby improving the quality of the castings.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be taken by way of limitation, It should be construed as being included in the scope of the right.

M: Playing mold
AP: Wear area
P: Plating layer
IP: inner plated layer
S100: (a) step
S200: Step (b)
S300: Step (c)
S400: (d)
S410: Step (d-1)
S500: Step (e)
S600: Step (f)

Claims (4)

In a reclaiming method for reusing a performance mold (M) having an inner surface worn by continuous casting,
(a) peeling off an inner surface plating layer of the performance mold (M) (S100);
(b) buffering the inner surface portion of the performance mold M after peeling off the plating layer (S200);
(c) a step (S300) of cultivating the plating layer (P) by forming a plating layer (P) on a wear area (AP) of the performance mold (M) after the buffing;
(d) machining the plating layer (P) grown on the inner surface of the playing mold (M) to form an inner surface layer (S400);
(e) forming an inner surface layer by the step (d) (S400), and forming an inner surface layer (IP) by plating the inner surface layer (S500); And
(S600) of finishing the inner surface portion and the outer surface portion of the playing mold (M) after forming the inner surface plating layer (IP) by the step (e) (S500)
(D-1) (S410) for reproducing the round portion R having a predetermined gradient in the performance mold M during the machining of the inner surface of the performance mold M after the step (d) ),
Wherein the plating layer (P) is formed through copper plating.
delete delete The method according to claim 1,
Wherein the inner surface plated layer (IP) is formed through nickel alloy plating.

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