JPS61225025A - Preparation of embossed mark - Google Patents

Abstract

PURPOSE:To prepare a surface embossed mark in integral relation to a base material, by pressing a plastic base material by a mold, of which the embossed pattern is reverse to a designed embossed mark to depress the mark parts from the surface of the base material and grinding the surface of the base material other than the mark parts to make the surfaces of the mark parts flush with the new surface of the base material. CONSTITUTION:A preheated temple 2 is pressed by a mold 1, of which the embossed pattern is reverse to a desired embossed mark, to depress mark parts and subsequently cooled to room temp. Next, the surface layer 2a of the temple 2 other than the depressed mark parts is removed by grinding and polished not only to make the surfaces of the mark parts flush with the new surface of the temple 2 but also to simultaneously finish a temple configuration. Subsequently, the temple 2 is again heated to naturally raise up the mark parts 2b and an embossed mark is prepared.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention provides an embossed mark (
For example, it relates to a method for manufacturing protruding letters, numbers, figures, patterns, etc.) integrally with a base material.

(Background of the Invention) Conventionally, when it is desired to attach an embossed mark (for example, a manufacturer's name, brand name, decorative pattern, etc.) on the surface of a plastic substrate, such as an eyeglass frame, the mark part is made separately.
It was attached to the base material with adhesive.

However, this method has disadvantages, such as the adhesive protruding out and spoiling the aesthetic appearance, the adhesive deteriorating over time and causing the mark to peel off, and the difficulty of gluing when the mark is small.

(Object of the Invention) Therefore, an object of the present invention is to provide a method for producing raised marks that does not have the above-mentioned drawbacks and is inexpensive even when producing a wide variety of products in small quantities.

(Summary of the Invention) The present inventor presses the surface of a plastic base material to
After creating a dent, the dent will remain as it is at room temperature, but when heated, the dent will swell, and once it swells, it will no longer return to its original state even if the temperature is returned to around room temperature. He discovered this phenomenon by chance, and using this as a hint, he invented a new method for producing raised marks.

That is, the present invention has the following steps: 1st step: Pressing the plastic base material (with heating in some cases) using a mold with an inverted concave and convex shape to form the desired embossed mark, and removing the mark from the surface of the base material. , 2nd step: Grinding the surface of the base material other than the mark part to make the surface of the mark part match or almost match the surface of the new base material, 3rd step: Heat the 2nd base material to make the mark part the base material. To provide a method for producing an embossed mark, characterized by the step of embossing it from the surface of a material.

Usable plastic base materials include (1) polyolefin-based homopolymers or copolymers such as PR, PP, etc.
Acrylic resins such as polyacrylic esters, polymethacrylic esters (PMMA and others), polystyrene-based homopolymers or copolymers such as polystyrene, styrene-MMA copolymers, styrene-acrylonitrile copolymers, acrylonitrile-butadiene-styrene copolymers polymers, vinyl chloride or vinylidene chloride homopolymers or copolymers, fluorocarbon resins such as polytetrafluoroethylene, polytrifluoroethylene, polyvinyl fluoride, PVA, P
VAc, polyacetal resins such as polyvinyl acetal, polyvinyl butyral, polyvinyl formal, polyester resins such as PET, PBT, polyarylate, polyamide resins such as nylon 66, polyimide resins, polyurethane, cellulose resins such as celluloid, cellulose acetate, cellulose Thermoplastic resins alone or blends such as propionate, cellulose butyrate, polysulfone, polyethersulfone, polyaramid, (2) phenolic resins, urea resins, melamine resins, unsaturated polyesters, epoxy resins,
Examples of allyl resins include thermosetting resins such as CR-39 resin, diallyl phthalate resin, casein resin, thermosetting urethane resin, and silicone resin.

The base material may be the same type of base material or two or more types of base materials laminated together (or a bonding material), as long as the base material does not separate during product use.In particular, two types of base materials may be laminated together and the surface base material is used for the mark part. If the other parts are polished away in the second step, the only remaining surface material will be the mark parts.
If you make the surface material a different color than the base material,
This is preferable when the mark part stands out from the (new) base material and is desired to stand out.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.

(Example) This will be explained according to FIGS. 1 (1) to (5).

Press a 3.5m+m thick celluloid board and cut out roughly shaped temples (the temples of glasses frames).

First step: Next, press the temple (2), which has been preheated to 40 to 50°C, using a mold (1) with an inverted concave and convex shape to form the desired raised mark (in this case, a simple island-shaped rectangular protrusion). After doing this, the marked part was recessed by 0.3ff111 (see Figure 1 (3)), and then the temple (2) was returned to room temperature.

Second step: After removing the surface layer (2a) other than the recessed mark portion of the temple (2) by 0.3su++ polishing,
Polishing is performed to match the surface of the mark portion and the surface of the new temple (2) (see FIG. 1 (4)) and at the same time finish the temple shape.

Third step: When the temple (2) was heated again to around 70'C, the mark portion (2b) naturally rose, producing an embossed mark (see FIG. 1 (5)).

Since this mark is the same color as the base temple, it is somewhat inconspicuous, but the mark may be colored to make it more noticeable.

(Example 2) This will be explained according to FIGS. 1 (1) to (5).

First, the thickness is 0.5 on a brown transparent celluloid base with a thickness of 41.
A plastic base material laminated with a +wm white opaque celluloid surface layer is prepared and pressed to cut out a roughly shaped temple (2).

1st step: 40 to 50% in advance in the same mold (1) as in Example 1
The temple (2), which had been heated to 0°C, was pressed to recess the mark part by 0.5 mm, so that the surface of the mark part and the underlying surface almost coincided (see Figure 2 (3)). .

2nd step: After polishing and removing the surface layer (2a) of the temple (2) other than the recessed mark part which has been returned to room temperature, the surface of the mark part and the new temple (2) surface (that is, the base surface) are polished. ) (see Figure 2 (4)) and finish the temple shape at the same time.

3rd step: Heat the temple (2) again to around 70℃.
Then, the white mark part (2b) naturally rose, and a bright raised mark was produced (see Figure 1 (5)).
)reference).

(Effects of the Invention) As described above, according to the present invention, the embossed mark is manufactured integrally with the base material, which eliminates the various drawbacks that would otherwise occur when the embossed mark was made separately and bonded with an adhesive.

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal sectional view illustrating the manufacturing process according to Example 1 of the present invention. FIG. 2 is a schematic longitudinal sectional view illustrating the manufacturing process according to Example 2 of the present invention. [Explanation of symbols of main parts] l・-・-Mold

Claims (1)

[Claims] First step: The desired raised mark is a step in which the plastic base material is pressed using a mold with inverted concave and convex portions, and the mark portion is recessed from the surface of the base material. Second step: Other than the mark portion. A step of grinding the surface of the base material to make the surface of the mark portion coincide or almost coincide with the surface of the new base material; Third step: a step of heating the base material to make the mark portion stand out from the surface of the base material. A method for manufacturing an embossed mark characterized by: