JP2000351058A - Method for shielding surface defect of molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent surface defects of a die formed stock from being conspicuous without increasing the manufacturing cost by printing a pattern over the whole surface on which generation of surface defects in the die formed stock is estimated. SOLUTION: A pattern is printed over a whole surface of a case 1 which is a die formed stock. The pattern 2 is preferably three-dimensional. The pattern 2 is preferably a simulation of a roughly woven cloth with coarse weave touch including grain, and ones free from meaning or regularity. The pattern may be a printed one using a foam ink. Since the location of generation of the defects such as flow mark or shrinkage can not be identified, the pattern 2 without regularity is printed all over the surface. Even when a defect is generated in an unidentified part of the surface of the case 1 which is the die formed stock, the surface defect disappear among the pattern 2, and is not conspicuous. If there is a flat space on which the printing is available, this method is applicable extensively for press cast stocks of light metal and injection molded stock of synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for concealing surface defects of a molded article.

[0002]

2. Description of the Related Art Products such as die-cast products and injection-molded products, which are formed by injecting molten metal or molten resin into a mold under pressure, have surface defects such as hot lines and sink marks. It is difficult to make sure that no occurrence occurs. for that reason,
Those having noticeable surface defects were generally repaired in another process, or were discarded and reused as raw materials.

[0003]

However, the setting of the repair process causes an increase in the number of manufacturing steps, and the disposal thereof causes a decrease in the yield. In any case, these issues go against the demand for reduction of manufacturing costs.

[0004] The present invention has been devised to solve such problems of the prior art, and its main objects are as follows.
An object of the present invention is to provide a method for making surface defects of a molded article less noticeable without increasing the manufacturing cost.

[0005]

In order to achieve such an object, in the present invention, a pattern is formed on the entire surface of a molded article (case 1 in the embodiment) where surface defects are expected to occur. (2.3) was decided to be printed. According to this, defects such as hot wrinkles or sink marks generated on the surface of the molded article can be made inconspicuous in the printed pattern.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to an embodiment shown in the accompanying drawings.

FIG. 1 shows a case 1 of a remote controller of an audio device as a molded product to which the present invention is applied.
Is shown. The case 1 is formed by molding a light metal such as magnesium, for example, and a pattern 2 imitating a wood grain is printed on the entire surface.

The pattern to be printed is not particularly limited, but preferably has a three-dimensional appearance as much as possible, such as the above-mentioned grain, a rough woven cloth having a rough texture, or a pattern having no meaning or regularity. The pattern 3 may be used (see FIG. 2), and in some cases, printing may be performed using foamed ink.

[0009] Since defects such as wrinkles and sink marks cannot be specified at the site where the defects occur, the irregularities 3 are printed over the entire surface as described above, thereby causing defects at unspecified portions on the surface of the molded article. Even if it does, these surface defects can be made to be inconspicuous by slipping into the pattern.

[0010] The present invention can be applied irrespective of the type of product as long as the flatness is such that printing is possible. Widely applicable to molded products.

[0011]

As described above, according to the present invention, the surface defects can be made inconspicuous without any trouble, so that the production cost of the molded article can be greatly increased without incurring a large increase in the production cost. Effects can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a remote controller case to which the present invention is applied.

FIG. 2 is a perspective view of another embodiment.

[Explanation of symbols]

 1 case 2-3 patterns

Claims (1)

[Claims] 1. A molded article characterized by printing a pattern on the entire surface where a defect is expected to occur so as to make defects such as wrinkles or sink marks generated on the surface of the molded article inconspicuous. Method for concealing surface defects.