JP2002113725A - Mold, molded article, and method for manufacturing them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mold dispensing with the postscript of specific data or the bonding of a seal in a molded article manufactured by the mold, the molded article and a method for manufacturing the mold and the molded article. SOLUTION: Specific data of the unidimensionally or two-dimensionally encoded mold and/or molded article is written in the molding surface of the mold to be transferred to the molded article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a molding die and a molded product, and relates to a molding die and a molded product to which unique information such as identification information and processing information is added, a method for manufacturing the same, and a method for manufacturing the molded product. The present invention relates to a method of manufacturing a molding die and a molded product that are used.

[0002]

2. Description of the Related Art Molding using a molding die is one of widely used manufacturing methods. In the case of resin products, injection molding of a thermoplastic resin, polymerization molding of a thermosetting resin or an ultraviolet curing resin, and the like are used. Can be illustrated.

[0003] Typical examples of the molded product manufactured by the injection molding include a housing of a personal computer, a printer, a television, a CRT or a liquid crystal display, a pickup lens, and the like. Examples of the molded product produced by the polymerization molding include a plastic lens represented by an eyeglass lens.

A finished product (product) using a molded product such as a personal computer or a printer is provided with unique information such as a product name and a serial number in order to identify the product. As a method of adding such unique information to a product or a molded product, a label that is printed with characters or a bar code representing the unique information is attached, or directly stamped on the surface of the molded product, or a character such as a numeral or an alphabet is used. Marking the unique information represented by on the mold, transferring this to the surface of the molded product, etc.
Can be mentioned.

[0005] In addition, unique information such as processing conditions and management conditions required in the process of manufacturing a molded article or in the process of manufacturing a finished product using the molded article is obtained by attaching a processing slip in which the unique information is written to the molded article. A method is adopted in which the fluid is caused to flow.

[0006] In addition to a molded product or a finished product using the molded product, it is necessary to similarly add unique information and a processing slip at the time of manufacturing a mold.

On the other hand, unique information such as an abbreviation of a product name is added to an eyeglass lens to identify the product.
Hereinafter, the prior art will be described using an eyeglass lens as an example.

A spectacle lens is a lens for correcting visual acuity, and can be roughly classified into a single focal point, a multifocal lens, and a progressive multifocal lens depending on its use. In addition, since the power, astigmatism axis, addition degree, and the like differ depending on the customer, there are a huge number of uniform specifications for each product. In addition, it is common to manufacture by a different method in a range where the order frequency is high and in a range where the order frequency is low.

[0009] In a range where the order frequency is high, casting molding is performed by combining molding dies so as to obtain a desired lens shape. A molded lens manufactured in this form is called a finish lens. Since the finish lens has an optical surface with sufficiently satisfactory accuracy, it is shipped as a finished product through a dyeing process, a hard coating process, a vapor deposition process, an inspection and shipping process, and the like according to an order.

On the other hand, in the range where the order frequency is low, a molded lens having a larger thickness than the finished product (hereinafter referred to as a semi-finished lens) is stocked, and the refractive surface for obtaining the prescribed prescription power is semi-finished. It is manufactured by creating a shape on the concave surface of the finish lens. The semi-finished lens optically finished through the shape creation step and the polishing step is shipped as a finished product through a dyeing step, a hard coat step, a vapor deposition step, an inspection and shipping step, and the like according to an order.

Among the spectacle lenses, the progressive multifocal lens has a character such as a numeral or an alphabet for determining the type of the lens which is transferred and engraved from a molding die on an outer peripheral portion which is cut off at the time of edging. There are many cases. By visually confirming the transferred characters, it becomes possible to select a semi-finished lens according to the prescription, or to specify a mold used in molding. Similarly, in a single focus or multifocal lens, characters representing unique information may be transferred and stamped outside the effective range of the lens.

[0012]

However, a finished product (product) using a molded product, such as a personal computer or a printer, is the same product, in order to identify the product or the molded product.
Even if they are the same molded product, a label printed with characters or barcode indicating unique information is attached to each of them,
It was necessary to imprint the unique information directly on the surface of the molded product. Therefore, a label and a label attaching cost for the production quantity are required. In the case of directly engraving, an engraving step and an engraving device are required, which increases the cost.

In the case where the unique information represented by characters such as numerals and alphabets is marked on a molding die and transferred to the surface of the molded product, the unique information is added to the finished product or each of the molded products. Although it is possible to save time and effort in adding, there is a limit to the amount of information that can be added using only characters such as numbers and alphabets in consideration of space.

[0014] Further, specific information such as processing conditions and management conditions required in the process of manufacturing a molded product or in the process of manufacturing a finished product using the molded product is obtained by converting a processing slip in which the information is written into a molding die or a molded product. The manufacturing process is fluidized in an attached form. Therefore, it is necessary to always make correspondence between the processing slip and the mold or the molded product.

On the other hand, in the case of spectacle lenses, as described above, the operator selects the lens according to the prescription by reading the characters transferred and stamped on the outer peripheral portion of the lens, that is, outside the effective range of the lens. Therefore, man-hours corresponding to the work time are required.

The characters to be transferred and imprinted on the lens are usually numbers or alphabets. Considering the size of characters that can be visually discriminated and the space for transferring and imprinting the characters, the amount of information that can be added by the transfer and imprint is limited. is there.

Furthermore, if it is attempted to automatically read the characters transferred and stamped on the lens by using image recognition technology, the position of the lens can be very efficiently determined only by a general orthogonal two-axis positioning mechanism. In addition, it is necessary to determine the position in the rotational direction, which leads to an increase in the cost of the apparatus.

The present invention has been made in view of the above circumstances, and in a molded article manufactured using a molding die, a label on which characters or barcodes representing unique information are printed, or the unique information is printed on the molded article. An object of the present invention is to provide a molding die, a molded product, and a method for producing the same, which can produce a molded product without increasing the number of steps and man-hours for postscript writing on the surface and without adding a processing slip. And

[0019]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, the identification information of the molding die and / or molded article, processing information and the like have been added to the molding surface of the molding die. It has been found that it is effective to write the unique information in the form of a one-dimensional code or a two-dimensional code and to transfer and imprint the information on a molded product.

That is, since the unique information is written in the mold and transferred, the writing process is required only when the mold is manufactured, and once it is written, it can be transferred as many times as necessary. Therefore, it is not necessary to postscript the unique information after molding, and it is not necessary to increase the number of steps for postwriting the unique information. Also, by writing a one-dimensional code or a two-dimensional code, the amount of information that can be written per unit area is dramatically improved. As a result, not only the unique information such as the product name and the serial number of the molded article and the product using the same, but also, for example, the serial number of the mold, the name of the mold, the manufacturing history,
It is also possible to write unique information of the mold itself, such as processing conditions. Furthermore, molding conditions and control numbers for molded products,
Even unique information such as processing conditions and process flow conditions can be written.

Further, since the above-mentioned unique information is written in the molding die and the molded product itself, the unique information can be obtained without attaching a processing slip. In addition, the one-dimensional code or the two-dimensional code has higher reading accuracy than reading characters such as numbers and alphabets by image processing, and can be read by an inexpensive device.

Further, identification information of a molding die and / or a molded product is provided at a portion to be removed in the process of completing the molded product,
It was also found that it is effective to write unique information such as processing information in the form of a one-dimensional code or a two-dimensional code.

For example, unique information such as a model name, a mold name, a mold number, and shape data of a semi-finished lens is one-dimensionally written on a molding surface on a shape creation side (usually a concave side) of a semi-finished lens of an eyeglass lens. It is transferred and stamped from the mold in the form of a code or a two-dimensional code. Since the semi-finished lens scrapes off the lens in the shape creation step according to the prescription, the one-dimensional code or two-dimensional code written on the shape creation surface side does not remain in the final lens. That is, there is no constraint on the write position. Therefore, if the unique information is marked almost at the geometric center of the molding surface on the shape creation side, the marking position of the unique information can be determined based on the outer diameter of the semi-finished lens, and the structure of the reading device can be simplified. it can.

Similarly, of the molding surface on the side (usually a convex surface) opposite to the shape-generating surface of the semi-finished lens or the molding surface of the finishing lens, a portion outside the effective range that does not remain in the final lens is formed after the molding step. Specific information such as identification information and processing information to be used is transferred and stamped from the mold in the form of a one-dimensional code or a two-dimensional code. By doing this,
Specific information required in the manufacturing process can be obtained directly from the molded article.

Further, by converting the unique information into a one-dimensional code or a two-dimensional code, not only is there no practical limit to the amount of information that can be written, but the code can be easily read by a scanner, so that it depends on the eyes of the operator. The lens can be identified without the need. As a result, the identification work conventionally performed by the worker can be easily automated.

That is, the first aspect of the present invention provides a molding die characterized in that the molding surface has information unique to the molding and / or the molding die added thereto.

According to a second aspect of the present invention, there is provided the molding die according to the first aspect, wherein unique information is added to a portion to be removed in the process of completing the molded product. .

The third aspect of the present invention is the first or second aspect.
In the described mold, the added unique information is identification information and / or processing information of the mold and / or the molded article, and the mold is provided.

According to a fourth aspect of the present invention, in the molding die according to any one of the first to third aspects, the unique information to be added is a one-dimensional code or a two-dimensional code. provide.

According to a fifth aspect of the present invention, there is provided a molding die according to any one of the first to fourth aspects, wherein the molding die is a molding die for a resin optical lens.

According to a sixth aspect of the present invention, there is provided a molded article formed by using the molding die according to any one of the first to fifth aspects, wherein unique information is transferred to a surface of the molded article. I will provide a.

According to a seventh aspect of the present invention, in the molded product according to the sixth aspect, the molded product is a semi-finished product of a resin optical lens, and the unique information is transferred to a portion to be removed in the course of completion. To provide a molded article characterized in that:

The invention according to claim 8 provides a method of manufacturing a molding die, characterized by adding information specific to a molding and / or a molding die to a molding surface.

According to a ninth aspect of the present invention, in the method of manufacturing a molding die according to the eighth aspect, the added unique information is identification information and / or processing information of the molding die and / or the molded product. And a method for manufacturing a molding die.

According to a tenth aspect of the present invention, in the method of the eighth or ninth aspect, the unique information to be added is a one-dimensional code or a two-dimensional code. I will provide a.

The eleventh aspect of the present invention is the eighth aspect of the present invention.
The method for manufacturing a molding die according to any one of claims 1 to 3, wherein the molding die is a molding die for a resin optical lens.

The twelfth aspect of the present invention is the eighth aspect of the present invention.
The method for manufacturing a molding die according to any one of the preceding claims, wherein the molded product is a semi-finished product of a resin optical lens, and wherein unique information is added to a portion to be removed in a process of completing the molded product. And a method for manufacturing a molding die.

The invention according to claim 13 is the invention according to claims 8 to 12
A method for manufacturing a molding die according to any one of the above aspects, wherein the identification and / or processing of the molding die is performed using the added unique information.

According to a fourteenth aspect of the present invention, there is provided a method for manufacturing a molded article, wherein the molding is performed by using the molding die according to any one of the first to fifth aspects, and the unique information is transferred to the surface of the molded article. Provide a way.

According to a fifteenth aspect of the present invention, in the method for manufacturing a molded product according to the fourteenth aspect, the molded product is a semi-finished product of a resin optical lens, and specific information is added to a portion to be removed in the process of completing the optical lens. Provided is a method for producing a molded article characterized by transferring.

According to a sixteenth aspect of the present invention, in the method for manufacturing a molded article according to the fourteenth or fifteenth aspect, the molded article is identified and / or processed using the transferred unique information. Provided is a method of manufacturing an article.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to a plastic spectacle lens (hereinafter, referred to as a lens) and a mold used for molding the same. It is not limited to the embodiment.

FIGS. 1 to 3 show an embodiment of a molding die and a lens according to the present invention. FIG. 1 shows a molding die to which unique information is added, FIG. 2 shows a molding of a lens, and FIG. FIG. 3 is a schematic view of a transferred lens.

First, the mold will be described. Generally, a lens mold is made of glass. However, the material is not limited to this as long as a desired accuracy can be obtained. The molding dies 1 and 2 shown in FIG. 1 have the accuracy to optically finish the molding surface of the lens. Mold 1
Of the molding surface (hereinafter, referred to as molding surface 5) and the molding surface (hereinafter, referred to as molding surface 6) of the molding die 2, a part 7 to be removed by the processing performed until the completion of the lens has unique information. 21
And 22 are marked. The unique information 21 and 22 include, in a one-dimensional code or a two-dimensional code format, the mold name, mold number, manufacturing history, lens shape data, and the like of each of the molds 1 and 2. In this example, a QR code is used to represent these data. Examples of the means for adding the unique information 21 and 22 include laser, blast, diamond pen, and etching. However, desired accuracy and readability after transfer are obtained, and damage to the mold during repeated transfer is reduced. The method is not limited as long as it can be processed as described above. In particular,
The depth of the marking is desirably 100 μm or less so as not to cause cracks or chipping called mold baldness during repeated molding.

Next, the molding step will be described. As shown in FIG. 2A, the molding of the lens is performed by using a molding die 1 and a molding die 2.
Is positioned and held at a desired interval, and an adhesive tape 3 is wound around the side surfaces of the molds 1 and 2 to be fixed. Next, a plastic material such as a monomer is filled in the space formed by the above. This is cured by heating or ultraviolet irradiation to form a lens. Finally, mold 1
And the mold 2 are removed, and the lens 4 is taken out. The unique information 21 and 22 marked on the mold are transferred to the molding surface of the lens 4 during molding.

When the finish lens 8 is molded, as shown in FIG. 2B, both the mold 1 and the mold 2 are outside the range 10 used as a completed lens (hereinafter, outside the effective diameter range). 11) and unique information 21 and 2
It is necessary to use a mold on which No. 2 is marked.

On the other hand, when the semi-finished lens 9 is molded, it is necessary to use the molding die 1 in which the unique information 21 is marked outside the effective diameter range 11 as in the case of the finish lens. However, since the entire surface of the molding surface 6 on which the shape creation processing according to the prescription is performed is out of the effective range, the unique information 22 is marked in the effective diameter range as shown in FIG. Mold 2 may be used.

In other words, the semi-finished lens 9
May be marked on the molding surface 6 with the unique information 22. Therefore, when the unique information 22 is marked substantially at the geometric center of the molding surface 6, the unique information 2 is determined based on the outer diameter of the semi-finished lens 9.
2 can be determined, and the structure of the reading device can be simplified.

As a result, as shown in FIG. 3A, the finish lens 8 is located outside the effective diameter range 11 of the molding surface 5 and / or the molding surface 6, and the semi-finish lens 9 is shown in FIG. As shown in b), at an area 11 outside the effective diameter range of the molding surface 5 and / or at any portion of the molding surface 6,
Unique information 21 and 22 are added by transcription.

Since the specific information 21 and 22 include various information related to the production of the mold and the lens, the specific information 21 and 22 are read by a scanner or the like in each step of the manufacturing process, so that the molding process can be performed. Naturally, shape creation process, polishing process, dyeing process, hard coat process,
Processing information and identification information can be obtained as needed in each manufacturing process such as a vapor deposition process. In addition, one-dimensional code or 2
When an amount of information that cannot be accommodated in the dimensional code format is required, it is also possible to use the read unique information as a key to query processing information stored in a personal computer or a server and use it for processing.

Similarly, the unique information can be used for managing the stock of the mold and the lens. For example, when a mold and a lens are stored in an automatic warehouse, it is possible to automatically manage replenishment and delivery of inventory by reading the added or transferred unique information.

Although the embodiments of the invention have been described with reference to the spectacle lens as an example, the present invention is not limited to the spectacle lens, but applies to all general molded products that perform product identification, processing, and flow management using a control number after molding. It is possible to apply the above method.

In addition, if the molded product does not hinder the quality even if the unique information remains in the final finished product, the unique information can be added irrespective of the part to be removed by processing.

[0054]

According to the present invention, one-dimensional code or two-dimensional code
The dimensionally coded unique information is written into the mold and is transferred to the molded product, so that it is not necessary to write down the unique information or attach a sticker.

[Brief description of the drawings]

FIGS. 1A and 1B show an example in which the present invention is applied to the manufacture of plastic spectacle lenses. FIG. 1A is a cross-sectional view of a molding die for molding the convex side of the lens, and FIG. FIG. 3C is a front view of the molding surface as seen from the front, FIG. 3C is a cross-sectional view of a molding die for molding the concave side of the lens, and FIG.

FIGS. 2A and 2B show a method for molding a plastic spectacle lens and a mold used therefor, wherein FIG.
1 is a schematic diagram illustrating a form of forming a finish lens, and FIG.

3A and 3B show a plastic spectacle lens onto which unique information is transferred, wherein FIG. 3A is a cross-sectional view of a finish lens and a front view as viewed from an arrow A side, and FIG. 3B is a cross-sectional view of a semi-finished lens and an arrow. It is the front view seen from A side.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mold 1 2 ... Mold 2 3 ... Adhesive tape 4 ... Lens 5 ... Mold surface of mold 1 (mold surface) 6 ... Mold surface of mold 2 (mold surface) 7 ... By the time the lens is completed A part to be removed by the processing to be performed 8 ... Finish lens 9 ... Semi-finish lens 10 ... Range used as a completed lens 11 ... Range outside the range used as a completed lens (outside the effective diameter range)

Claims (16)

[Claims] 1. A molding die, characterized in that information specific to a molding and / or a molding die is added to a molding surface. 2. The molding die according to claim 1, wherein unique information is added to a portion to be removed in a process of completing the molded product. 3. The molding die according to claim 1, wherein the added unique information is identification information and / or processing information of the molding die and / or the molded product. 4. The molding die according to claim 1, wherein the unique information to be added is a one-dimensional code or a two-dimensional code. 5. The molding die according to claim 1, wherein the molding die is a molding die for a resin optical lens. 6. A molded product, which is molded using the molding die according to any one of claims 1 to 5, wherein unique information is transferred to a surface of the molded product. 7. The molded product according to claim 6, wherein the molded product is a semi-finished product of a resin optical lens, and unique information is transferred to a portion to be removed in a process of completing the optical lens. Molding. 8. A method for manufacturing a molding die, comprising adding unique information of a molded product and / or a molding die to a molding surface. 9. The method for manufacturing a molding die according to claim 8, wherein the unique information to be added is identification information and / or processing information of the molding die and / or the molded product. Method. 10. The method for manufacturing a molding die according to claim 8, wherein the unique information to be added is a one-dimensional code or a two-dimensional code. 11. The method for manufacturing a mold according to claim 8, wherein said mold is a mold for a resin optical lens. 12. The method for manufacturing a molding die according to claim 8, wherein the molded product is a semi-finished product of a resin optical lens, and the molded product is removed in a process of reaching completion. A method for manufacturing a molding die, characterized by adding unique information to a part. 13. The molding die manufacturing method according to claim 8, wherein the identification and / or processing of the molding die is performed using the added unique information. Manufacturing method. 14. A method for producing a molded article, comprising molding using the molding die according to claim 1, and transferring unique information to a surface of the molded article. 15. The method of manufacturing a molded product according to claim 14, wherein the molded product is a semi-finished product of a resin optical lens,
A method for manufacturing a molded product, comprising transferring unique information to a portion to be removed in a process of completing the process. 16. A method for manufacturing a molded article according to claim 14, wherein the identification and / or processing of the molded article is performed using the transferred unique information.