JP2005052871A - Casting method and mold therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a casting method in which the yield of molten metal as raw material is high. <P>SOLUTION: The casting method is performed by using a lower mold which is a main mold formed by various kinds of mold-forming methods, and has no cavity required for achieving a casting plan but has only a cavity required for casting a casting product, and an upper mold which is a main mold formed by various kinds of mold-forming methods, and has no cavity for achieving a casting plan, but has a projection part capable of demarcating the cavity for casting a casting product. After pouring molten metal of the required amount to cast only the casting product into the cavity of the lower mold, the projection part of the upper mold is allowed to advance into the cavity with the molten metal poured therein to demarcate the cavity required to casting only the casting product, and the upper mold overlaps the lower mold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to an epoch-making casting method and its mold that eliminate the need to remove a gate system, a feeder, and the like based on a casting method from a casting material.

In casting a casting, casting a casting by injecting molten metal into a cavity defined in a mold formed by superposing upper and lower main molds made of green sand has been performed for a long time. In this conventional casting method, various casting methods have been traditionally and conventionally added to the mold in order to accurately cast a casting product having no defects (see, for example, Non-Patent Document 1). .
Japan Foundry Association Illustrated Casting Terminology Dictionary First Edition Published by Japan Published by Nikkan Kogyo Shimbun July 30, 1973

For this reason, in the conventional casting method, about 50 to 70% of the total molten metal injected is used as the casting product among the molten metal injected into the mold, and the rest is the gate system of the casting plan. Therefore, the conventional casting method has a problem that the yield of molten metal as a raw material is extremely poor.

Accordingly, the inventors of the present invention have conducted intensive research on the casting method in order to improve the yield of molten metal in the casting method. As a result, we were able to complete a casting method that is not bound by traditional and conventional casting methods.

This invention is made | formed in view of said situation, The objective is to provide the casting method with the high yield of the molten metal as a raw material, and its casting_mold | template.

In order to achieve the above object, the casting method of the present invention is a main mold formed by various mold forming methods and does not have a cavity necessary for achieving the casting method, and is necessary for casting product casting. A casting mold casting cavity is formed by a lower mold having only a cavity, and a main mold formed by various mold molding methods and not having a cavity necessary for achieving a casting method. A casting method using an upper mold having a projectable portion that can be defined, and after injecting an amount of molten metal necessary for casting only the casting product into the cavity of the lower mold, The upper mold is superposed on the lower mold so that the protrusions of the upper mold enter the cavities of the molten metal injection to define the cavities necessary for casting only the casting product. It is characterized in.

As is clear from the above description, the present invention is a main mold formed by various mold forming methods and does not have a cavity necessary for achieving a casting method, but only a cavity necessary for casting product casting. Cavity for casting products can be defined with the lower mold cavity and the main mold formed by various mold making methods, and without the cavity required to achieve the casting plan. Casting with an upper mold having a protruding portion, and after injecting an amount of molten metal necessary for casting only the casting product into the cavity of the lower mold, The upper mold is overlaid on the lower mold so as to define a cavity necessary for casting only the casting product by allowing the protruding portion to enter the cavity of the molten metal injection. Things product exhibits excellent other daily effects such as can be easily and reliably cast high yield of the molten metal conditions.

In the present invention, the various mold making methods refer to molds such as green molds, shell molds, coal and box molds, self-hardening molds, etc. It doesn't matter.
In addition, the casting method of the present invention can use a molten metal having a temperature of 100 to 200 ° C. higher than the liquidus line temperature of the molten metal. Become energy.
In addition, since the casting method of the present invention can superimpose the upper and lower molds with high accuracy, the cast product can be made ultra-thin.

In addition, the start timing of overlaying the upper mold on the lower mold is determined using at least one of the molten metal temperature, mold temperature, pouring start and / or end time, and molten metal material as parameters. This makes it possible to cast a desired casting product accurately and easily.
In addition, by adding a lifting cavity to a cavity required for casting product casting, it is possible to give a certain range to the amount of molten metal necessary for casting only the casting product.

Here, the casting product is a product obtained by removing casting methods such as pouring gates, frying, degassing, etc. from general casting materials taken out from the mold after the frame is released. That is, it is a state where it is attached to the machine as a final part or sold separately.
Further, the molten metal means a material in which iron or non-ferrous metal is dissolved and can be poured into a mold.
The lower mold is a main mold formed by various mold forming methods and has only a cavity necessary for casting product casting without having a cavity necessary for achieving a casting plan. The upper mold is a main mold formed by various mold forming methods and does not have a cavity necessary for achieving the casting method. A cavity for casting product casting is formed with the cavity of the lower mold. This refers to a mold having only definable protrusions.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the lower mold 1 is a main mold formed by a green molding method in a casting frame 3 using green sand 2, and does not have a cavity necessary to achieve a casting plan. Only the cavity 4 required for product casting is provided. Further, the upper mold 5 is a main mold formed by the green molding method in the casting frame 7 using the green sand 6 and does not have a cavity necessary for achieving the casting method. Only the protruding portion 8 that can define a cavity for casting product casting with the cavity 4 is provided.
In FIGS. 1 and 2, reference numeral 9 is a pouring device, and 10 is a molten metal.

Next, a procedure for casting a desired casting product using the lower mold 1 and the upper mold 5 will be described. First, as shown in 1 of FIG. 2, a pouring device 9 is carried between the upper and lower molds 5 and 1 arranged at a predetermined interval in the vertical direction, and subsequently, shown in 2 of FIG. Thus, the molten metal 10 in an amount necessary for casting only the casting product is injected into the cavity 4 of the lower mold 1. Next, as shown in 3 of FIG. 2, the pouring device 9 is unloaded from between the upper and lower molds 5, 1, and then the unloading of the pouring device 9 is completed as shown in 4 and 5 of FIG. 2. Thereafter, the upper mold 5 is sequentially lowered, and as shown in 6 of FIG. 2, the protrusion 8 of the upper mold 5 enters the cavity 4 for injecting the molten metal to define a cavity necessary for casting only the casting product. In this manner, the upper mold 5 is superposed on the lower mold 1. After the injected molten metal 10 is solidified, the desired casting product can be obtained by collapsing the upper and lower molds 5.

It is a longitudinal cross-sectional view which shows the upper and lower casting_mold | template of one Example of this invention. It is explanatory drawing for demonstrating the casting method of one Example of this invention.

Explanation of symbols

1
Lower mold 5 Upper mold

Claims (6)

A main mold made by various mold making methods and a lower mold that does not have a cavity necessary for achieving a casting plan, but has only a cavity necessary for casting product casting, and a mold by various mold making methods. Casting using an upper mold having a protruding portion capable of defining a cavity for casting product casting with the cavity of the lower mold without the cavity necessary for achieving the casting plan. A method of performing
After injecting the amount of molten metal necessary for casting only the casting product into the cavity of the lower mold, the protruding portion of the upper mold is entered into the cavity of the molten metal injection to cast only the casting product. A casting method characterized in that the upper mold is superposed on the lower mold so as to define a cavity necessary for performing. The casting method according to claim 1,
The casting method, wherein the temperature of the molten metal is higher by 100 to 200 ° C. than the liquidus temperature of the molten metal. The casting method according to claim 1 or 2,
The timing for starting the overlaying of the upper mold on the lower mold is determined by using at least one of a molten metal temperature, a mold temperature, a pouring start and / or end time, and a molten metal material as a parameter. Casting method characterized. A mold for casting a casting product that eliminates the work of removing a pouring gate system, a feeder, etc. from a casting material based on a casting method,
A lower mold which is a main mold formed by various mold making methods and does not have a cavity necessary for achieving a casting method, and has only a cavity necessary for casting product casting;
It is a main mold made by various mold making methods and does not have a cavity necessary to achieve the casting plan, but only the protruding part that can define a cavity for casting product casting with the cavity of the lower mold An upper mold having
A mold characterized by containing. The mold according to claim 4, wherein
A mold characterized by adding a finishing allowance to a cavity required for casting product casting. The mold according to claim 4 or 5,
A mold characterized in that a lifting cavity is added to a cavity required for casting product casting.