JPH04351264A - Method for correcting distortion of casting product - Google Patents

Abstract

PURPOSE:To stably correct distortion in a short time by pressing an aluminum casting product put between both upper and lower dies in a hot press at the necessary temp. and for the necessary time. CONSTITUTION:An aluminum casting product 1 is pressed between the lower die 3 and the upper die 4 in the hot press 2 at the necessary temp. and for the necessary time. At this time, the casting product 1 is made to be perfectly held or held only at least the part to be corrected in this product with the lower die 3 and the upper die 4. By this method, deformation, warp and the distortion after casting can be uniformly corrected and also as this work can be executed in a short time, improvement of the productivity can be contributed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for correcting distortions in cast products used for chassis of electronic equipment and the like.

0002

[Prior Art] Conventionally, as a method for correcting deformation, warpage, and distortion that occur after or during casting of a cast product formed by melting aluminum, zinc, magnesium, etc. and injecting it into a mold, cooling has been used. In the meantime, it was common for workers to lightly or forcefully hit deformed, warped, or distorted parts with a hammer or the like.

0003

[Problems to be Solved by the Invention] However, in the above-mentioned conventional method for straightening the distortion of a cast product, the worker deforms it with a can, warps it, and hits the distorted part lightly or hard with a hammer, etc., so it is difficult to straighten it uniformly. In addition, there was a problem that it could not be performed without variation and in a short time.

[0004] The present invention has been made to solve these conventional problems, and aims to provide an excellent method for straightening distortion of cast objects, which can straighten uniformly, without variation, and in a short time. It is something to do.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention corrects deformation, warpage, and distortion by hot pressing a cast product.

[0006]

Therefore, according to the present invention, deformation, warpage, and distortion can be corrected by hot pressing a cast product, and the product can be corrected in a short time without variation.

[0007]

[Embodiment] Fig. 1 shows the structure of an embodiment of the present invention, in which 1 is an aluminum casting, 2 is a hot press, 3 is a lower mold for hot press, and 4 is a hot press. This is an upper mold for hot pressing, and the lower mold 3 and the upper mold 4 form a cast product 1.
It is configured to completely clamp the cast product 1, or at least to clamp only the portion of the cast product 1 to be corrected. 5 is a hot press mold temperature controller, 6 is a timer, 7
indicates a pressure gauge.

Next, to explain the operation of the above embodiment, the aluminum casting 1 is set in the lower mold 3 of the hot press,
The mold temperature controller 5 is set to 200° C. to 500° C., the pressurization time is set to 5 seconds to 3 minutes using the timer 6, and the pressure gauge 7 is set to 0.1 kg/cm 2 to 0.5 kg/cm 2 . Next, a hot press upper mold 4 is pressed against the aluminum casting 1 to perform pressing.

As described above, according to the above embodiment, the aluminum casting 1 is formed using the lower hot press mold 3 and the upper hot press mold 4.
The mold temperature controller 5, timer 6, and pressure gauge 7 can apply the required temperature, time, and pressure to the aluminum casting 1.
It has the effect of being able to correct deformation, warpage, and distortion uniformly with less variation and in a short time.

Note that this effect is more effective as the wall thickness of the cast product is thinner, and in the case of an aluminum cast product, it is particularly effective when the average wall thickness is 3 mm or less.

[0011] Furthermore, when this method is used, the mold release agent used to improve the release of the mold during casting, which is attached to the surface of the cast product, changes color. This makes it possible to easily distinguish visually whether the image has been corrected or not.

0012

[Effects of the Invention] As is clear from the above embodiments, the present invention is a method in which a cast product is set in upper and lower molds, and deformation, warpage, and distortion after casting are corrected by hot pressing. This has the effect of being able to straighten uniformly without any variation, and also increasing productivity because the work can be done in a short time.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a hot press apparatus in an embodiment of the present invention.

[Explanation of symbols]

1 Aluminum castings 2 Hot press 3 Lower mold 4 Upper mold 5 Mold temperature controller 6. Timer 7 Pressure gauge

Claims (2)

[Claims] 1. A method for correcting distortion of a cast product, which comprises setting the cast product in upper and lower molds and hot pressing the cast product. 2. The method for straightening distortion of a cast product according to claim 1, wherein the cast product is coated with a mold release agent used during casting of the cast product.