JP2011131263A - Automated coated film peeling device by laser beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coated product of high quality and masking-less coating, wherein a coated film layer is peeled with high accuracy by abrading only the coated film layer at the predetermined part without damaging a base layer (a base material layer and a chemical-converted layer) at the predetermined part requiring the conductivity or the like, of a coated product corresponding to a casing of a digital camera or the like by using laser beam. <P>SOLUTION: An automated coated film peeling device by laser beam, consists mainly of: a laser beam machining apparatus 50 for peeling a coated film layer 40c by the abrasion; a device for collecting fine powder of the coated film layer 40c generated during the abrasion phenomenon; an automatically inclining table having a receiving tool for setting a coated product; an automatically feeding device and an automated taking-out device of the coated product to the inclining table; and an image processing device or the like to determine the machining quality of the coated film peeling at a predetermined part 70. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to an automatic paint film peeling apparatus for partially peeling a film at a predetermined site of a paint molded product using a laser beam.
In particular, the coating masking jig for conventional coated molded products can be manufactured and painted by peeling only the coating film layer of the predetermined part that should not be painted in the coated molded product, which should not be painted, with laser light. The masking work process is no longer necessary. As a result, the initial cost such as product design, mold design, mold production, coating masking jig molding and coating masking jig shape evaluation in the manufacturing process of the coating masking jig is eliminated. The running cost in the paint masking work process can be greatly reduced. In addition, the paint removal processing program of the laser processing device is created based on the past integrated data regarding the optimum laser output of various paints used for the coating film layer and the shape CAD data of the molded product to be coated. In a three-dimensional complex shape coated molded product, it is possible to peel only the coating film layer of a predetermined part with high accuracy without damaging the base layer (base layer and chemical conversion treatment layer). It relates to the provision of masking-less paint molding products.

Conventionally, in a painting process of a molded article to be coated, painting and painting baking are performed after a painting masking jig or the like is attached to a predetermined portion that requires electrical conductivity.
In addition, in the manufacture of metal integrated painting masking jigs currently used in the painting process of housings such as video cameras, digital cameras, and mobile phones, manufacturing by combining the parts to be coated that correspond to the housings. Therefore, the manufacturing start time of the metal integrated paint masking jig is greatly delayed, and the lead time from receiving an order to submitting the primary sample to the end user requires a long time.

In general, as a coating masking material used for a molded article corresponding to a casing of a video camera, a digital camera, a mobile phone, etc., in a single type coating masking material, a heat-resistant masking tape or a heat-resistant masking tape is used. Masking seals are the mainstream, and painting masking work on certain parts that should not be painted that require the continuity of the molded article to be painted is performed manually by a person who has acquired the technique using tweezers etc. ing.

In addition, in the painting process using a coating masking jig for a molded article to be painted, as an incidental work before and after the painting process, a work for attaching / detaching the painting masking jig to the molded article by a human hand is performed. However, it is difficult to reduce the running cost such as the labor cost and the labor saving of the attaching / detaching work by mechanization etc. by the coating method using the conventional coating masking jig.

In general, the integrated paint masking materials include rubber-based, elastomer-based, general-purpose resin-based and metal-based materials, but rubber-based, elastomer-based and general-purpose resin-based integrated masking jigs. However, it is difficult to find an appropriate coating masking material that satisfies the continuous use temperature condition in a severely high temperature (170 ± 10 ° C.) atmosphere of the paint baking line after painting in the painting process.

In addition, under the severe continuous high-temperature atmosphere of the paint baking line after painting, the general-purpose resin-based paint masking jig is likely to be deformed due to thermal effects, and there is a concern that the coating yield in the painting process may deteriorate due to a decrease in masking accuracy. ing. Further, the metal-integrated paint masking jig has problems such as deformation of the molded article to be coated due to the difference in the physical property value of the linear expansion coefficient from the molded article to be coated.

In addition, the coating masking jig using metal-based materials is manufactured by superimposing sheet metal products by matching the actual moldings to be coated. The present situation is that it is difficult to manufacture an optimal coating masking jig particularly for a molded article having a three-dimensional complicated shape.

In addition, the required number of planned productions in the painting process of the painting masking jig is set assuming the production quantity at the peak of monthly production of the molded article to be coated. Requires a large amount of paint masking jigs, which incurs a high initial cost in the production of paint masking jigs, and surplus paint masking jigs in the case of reduced production after the peak of monthly production or small production just before mass production is terminated. Is currently occurring in large quantities.

In particular, metal-based coating masking jigs used in conventional coating methods are currently discarded as scrap because it is difficult to cope with modification of the shape of the object to be coated.

The following problems exist in the above-described coating method using a conventional coating masking jig and various commonly used coating masking materials.
For example, in the manufacture of a conventional metal integrated paint masking jig, the manufacturing start time of the metal integrated paint masking jig is greatly delayed due to the manufacturing by the sheet metal processing method by combining the molded objects to be coated. In addition, the metal-integrated paint masking jig has a low masking accuracy, so it requires a large number of prototypes, requires a lot of cost and lead time, and consequently leads to a long lead time from receiving an order to submitting a primary sample to the end user. It currently takes a period of time. Therefore, it is necessary to improve the product masking jig product design, mold design, mold manufacturing, etc. in the painting method using the conventional painting masking jig, early lead time compression and early mass production in the trial production process. It has been.

Moreover, the masking work to the part which should not be painted which requires the heat resistance masking tape of the paint masking material currently used industrially, or the conductivity of the molded article to be coated by the heat resistant masking seal, Since there are many masking parts, since the person who has acquired the technology has done it manually using tweezers, etc., the application of the coating masking material before painting and the painting masking material after painting baking in the painting process The stripping work takes a long time, and improvement in work efficiency in the paint masking work is demanded.

In addition, rubber-based, elastomer-based, and general-purpose resin-based coating masking materials have problems with heat-resistant strength under severe high-temperature (170 ± 10 ° C) continuous atmosphere in the coating baking line in the coating process of molded articles to be coated Therefore, improvement as an optimal paint masking material is demanded.

In addition, since metal-based masking jigs are manufactured by superimposing sheet metal products by matching the actual objects to be painted, there is a restriction on the degree of freedom of mask shape for objects to be painted with a three-dimensional complex shape. In addition, it is difficult to completely prevent unnecessary spraying of a part that does not require painting that requires electrical conductivity of a molded article to be coated, and creation by a new technical method is expected.

In addition, the metal-based masking jig has a coefficient of linear expansion with that of the object to be coated in a severe high temperature (170 ± 10 ° C) continuous atmosphere in the paint baking line after painting in the coating process of the object to be coated. Due to the difference in physical property values, there are problems such as deformation of molded articles to be coated. Therefore, the creation by a new technical method other than the method using the coating masking jig currently used industrially is expected.

The present invention is intended to solve the problems of the coating method using such a conventional coating masking jig, and requires the conductivity of the coated molded product without using the coating masking jig. The purpose is to realize a new technical method (paint masking-less) that removes only the coating film layer of the predetermined part without damaging the underlying layer (base layer and chemical conversion treatment layer) of the predetermined part. Is.
In order to achieve the above object, the present invention irradiates the surface of a predetermined part that requires the conductivity of the coated molded article on which the coating film layer is formed with laser light, and ablate the coating film layer ( A laser processing device that peels off when the paint film layer is decomposed, vaporized, and evaporated), an apparatus that collects fine powder of the paint film layer that occurs during the ablation phenomenon, and an automatic tilting table that has a receiving jig for setting the paint molding This is an automatic coating film peeling apparatus using a laser mainly composed of an automatic supply / removal device for a coated molded product to and from an automatic tilting table and an image processing device for judging the processing quality of a coated and peeled product of the coated molded product.

In addition, by effectively utilizing the shape CAD data of the object to be coated and the past accumulated data on the optimal laser output of various paints used for the paint film layer, the optimum paint film peeling processing program of the laser processing equipment is developed. It can be created and the coating layer of the predetermined part is peeled off with high accuracy without damaging the base layer (base layer and chemical conversion treatment layer) of the predetermined part that requires the conductivity of the coated molded product. The new technical method (paint masking-less) makes possible the early start of the paint masking jig, which had the conventional painting method using the paint masking jig, and lead time compression in the trial production process. In early mass production, improvement of work efficiency in paint masking work and severe high temperature (170 ± 10 ℃) continuous atmosphere in paint baking line Kicking issues such as improvement of the masking precision is resolved.

As described above, the laser processing apparatus of the automatic coating film peeling apparatus using the laser according to the present invention uses a known laser processing method to provide an undercoat layer, a so-called base layer, and a base layer of a predetermined part of the coating molded product. It is possible to provide a new technical method (coating masking-less) capable of peeling only the paint film layer at a predetermined site without damaging the chemical conversion treatment layer for the purpose of rust prevention and paint adhesion.

In addition, the above-mentioned new technical method is the peeling of only the coating film layer at a predetermined portion using a laser beam performed after the coating process of the molded article to be coated, and the high-precision processing of the predetermined portion requiring continuity and the like. By making it possible to achieve this, it is possible to significantly improve the coating yield due to the masking failure of the conventional paint masking part. By using the above-mentioned new technical method (no coating masking) that does not use tools, it is possible to shift to sampling quality inspection, achieve a reduction in load and a reduction in inspection time in quality inspection, and thus conductivity is required. Therefore, it is possible to prevent outflow of poor quality at a predetermined portion.

In addition, the above-described new technical method can greatly improve the initial cost related to the production of the coating masking jig and the running cost such as the labor cost by automating the coating film peeling apparatus because the painting masking jig is not required.

In addition, the above-mentioned new technical method eliminates the need for a paint masking jig and eliminates the manufacturing lead time of the paint masking jig, thereby significantly improving the lead time from order receipt to primary sample submission to the end user. Is planned.

In addition, conventional metal-based paint masking jigs are deformed parts to be coated due to differences in physical property values in the linear expansion coefficient with the parts to be coated under severe high temperature continuous atmosphere in the paint baking line in the painting process. However, the above-mentioned new technical method is based on the above-mentioned problem by peeling only the coating film layer of a predetermined part that requires electrical continuity using laser light after the coating process of the molded article to be coated. To solve.

In addition, the conventional masking work with a heat-resistant masking tape or heat-resistant masking seal has a problem with the efficiency of the work when there are a large number of masking parts. The above-mentioned problem is solved by peeling off only the coating film layer at a predetermined site that requires electrical conductivity using laser light, etc., performed after the coating process of the coated molded product.

In addition, conventional rubber-based, elastomer-based and general-purpose resin-based coating masking materials satisfy continuity and heat resistance as design requirements for coating masking jigs, especially in coating masking jigs that require electrical conductivity. Although it was difficult to find an appropriate paint masking material to be applied, the above-mentioned new technical method is applied to a predetermined part that requires continuity using laser light after the painting process of the object to be coated. The above-mentioned problem is solved by peeling only the coating layer.

In addition, the conventional metal-based paint masking jig has low masking accuracy for the shape of the molded article to be painted, and in particular, there are restrictions on the degree of freedom of the mask shape for the molded article with a three-dimensional complex shape. Although there was a problem of unnecessary paint blowing on parts that do not require painting that requires electrical continuity of the product, the above-mentioned new technical method used laser light performed after the painting process of the molded article to be coated The above-mentioned problem is solved by peeling only the coating film layer at a predetermined site that requires electrical conductivity.

In addition, the above-mentioned new technical method can be applied in a short time and easily by adding a partial correction of the coating film peeling processing program of the laser processing equipment to the design change of the paint masking specification of the molded product to be coated. Correspondence is possible.

It is a flowchart of the new painting process which does not require a painting masking jig. It is a flowchart of the conventional painting process using a painting masking jig. It is a schematic plan view of the predetermined part which peels only the coating coating layer of a coating molded product, and the predetermined part which needs masking of a to-be-coated molded product. FIG. 4 is a schematic AA cross-sectional view of FIG. 3. FIG. 4 is a schematic side view of FIG. 3. It is a schematic plan view of the coating masking jig conventionally used in the coating process. FIG. 7 is a schematic side view of FIG. 6. It is a figure before the laser processing which shows the concept of the paint peeling by a laser. It is the figure after the laser processing which shows the concept of the paint peeling by laser

The present invention is a new technical method (coating masking-less) that does not require a coating masking operation and a coating masking jig 30 for a portion that should not be painted, which requires electrical conductivity in the conventional coating method, Past integrated data on the optimum laser output of various paints used for the shape CAD data of the molded article 10 to be painted and the coating film layer 40c for the parts that should not be painted, such as the conductivity of the coated molded article 20 By effectively utilizing the laser beam 60, only the coating film layer 40c at a predetermined site is used with high accuracy without damaging the underlying layers (the base layer 40a and the chemical conversion layer 40b) of the coated molded product 20 The part is to be peeled off. As a result, it is possible to significantly reduce the initial cost related to the production of the coating masking jig 30 in the painting method using the conventional coating masking jig 30 and the running cost in the painting masking work. And it aims at enabling labor saving of the coating film peeling process by the automatic coating film peeling apparatus by a laser. Furthermore, the aim is to significantly shorten the lead time from order receipt to the primary sample submission to the end user by reducing the paint masking by the above-mentioned new technical method.

Hereinafter, a preferred embodiment of a coating film peeling method using a laser beam 60, in which the masking of the molded article 10 to be coated according to the present invention is reduced, will be described with reference to the drawings.

FIG. 1 shows a predetermined shape of a coated molded product 20 using a laser beam 60 on the surface of a predetermined portion 70 that requires electrical conductivity or the like of the coated molded product 20 on which a coated film layer 40 c according to an embodiment of the present invention is formed. The flowchart of the new coating process which peels only the coating film layer 40c of the site | part 70 is shown. FIG. 2 shows a flowchart of a conventional coating process using the coating masking jig 30 of the conventional molded article 10 to be coated.

First, the flowchart of the new painting process by the new technical method (paint masking-less) of FIG. 1 is demonstrated.

Further, in step 1 of FIG. 1, a coated molded product 10 corresponding to a housing such as a digital camera is prepared.

Further, in step 2 of FIG. 1, the molded article 10 to be coated is attached to a painting hanger of a loop type automatic painting line without a painting masking jig 30 (painting masking-less), Automatic painting and automatic paint baking are applied. In addition, after the completion of this process, the paint molded product 20 is removed from the paint hanger by a human hand.

Further, in step 3 of FIG. 1, the coated molded product 20 before laser processing shown in FIG. 8 on which the coating film layer 40c is formed is set in a laser processing apparatus 50 having an automatic tilting table, and FIGS. 5 is irradiated with a laser beam 60 having an irradiation energy of approximately 30 watts on the surface of the predetermined portion 70 that requires the conductivity of the coated molded product 20 shown in FIG. 5, and the coating film layer 40c shown in FIGS. The predetermined portion 70 shown in FIG. 9 is not damaged by ablation without damaging the base layer 40a of the molded article 20 shown in FIGS. The coating film layer 40c is peeled off. Further, the processing quality of the predetermined portion 70 after laser processing is determined via the image processing apparatus.

Further, in step 4 of FIG. 1, a finished product 20 is obtained by peeling only the coating film layer 40 c of a predetermined portion 70 that requires electrical conductivity in a housing such as a digital camera.

Further, the laser processing apparatus 50 has an apparatus for collecting fine powder of the coating film layer 40c generated during the ablation phenomenon as an accessory apparatus.

Further, the laser processing apparatus 50 includes a receiving jig for setting the coated molded product 20 as an accessory device, and an automatic tilting table tilted at an arbitrary angle from front to back and left and right and an automatic tilting table of the coated molded product 20 to the automatic tilting table. It has an image processing apparatus that determines the processing quality of the supply / extraction device and the coated film peeling processed product of the coated molded product 20.

Further, the flowchart of the conventional coating process of FIG. 2 will be described.
First, the conventional coating method requires the coating masking jig 30 shown in FIGS. 6 and 7, and generally product design, mold design, mold production, and coating masking jig 30 of the coating masking jig 30. Is manufactured through processes such as the shape evaluation of the coating masking jig 30 in the process of molding and trial production / mass production.
Therefore, a high initial cost occurs in the series of manufacturing processes described above. In addition, as an incidental work before and after the painting process, work efficiency is extremely low, such as attaching / detaching the paint masking jig 30 to / from the object to be coated 10 by a human hand, and cost reduction through labor saving can be achieved. Difficult problems are evident in the background.
Hereinafter, Step 1 in FIG. 2 will be described.

First, in step 1 of FIG. 2, a coated article 10 corresponding to a housing such as a digital camera is prepared.

In step 2 of FIG. 2, the coating masking jig 30 is attached to the object to be coated 10 by a human hand.
Therefore, since the work in this process is a work by human hands, there is a strong demand for cost improvement by improving work efficiency. In particular, when a metal coating masking jig is used, there is a concern that the design surface of the molded article 10 to be coated may be damaged due to the inadequate mounting work, resulting in poor appearance quality.

Further, in step 3 of FIG. 2, the molded article 10 to which the coating masking jig 30 is attached is attached to a painting hanger of a loop type automatic painting line by a human hand, and automatic painting and automatic painting baking are performed. Applied. In addition, after the completion of this process, the paint molded product 20 is removed from the paint hanger by a human hand.
Therefore, in a severe continuous high-temperature atmosphere (170 ± 10 ° C.) of the paint baking line after painting, the molded article 10 to which the paint masking jig 30 is attached has a physical property of linear expansion coefficient with the paint masking jig 30. Due to the difference in value, the molded article 10 to be coated is deformed and the present situation is concerned that the yield of the coating process is deteriorated due to a decrease in masking accuracy.

Further, in step 4 of FIG. 2, the paint molded product 20 to which the paint masking jig 30 is attached is removed by the human hand, and the continuity of the paint molded product 20 is targeted for the total number. The determination of the quality evaluation of a predetermined part that requires is visually performed.
Therefore, as in the above-described step 2 in FIG. 2, the current situation is that there is a strong demand for cost improvement by improving work efficiency because of work by human hands. In particular, when a metal coating masking jig is used, there is a concern that the appearance of the appearance quality may be deteriorated by scratching the design surface of the coated molded product 20 due to omission of the removal operation.

Further, in step 5 of FIG. 2, the finished product 20 is a finished product 20 without the coating film layer 40 c of the predetermined portion 70 that requires electrical conductivity in a housing such as a digital camera.

The present invention relates to parts that should not be painted, such as video cameras, digital cameras, cellular phones, etc., and parts used for vehicles (cars, motorcycles, etc.) that require electrical conductivity. It can be applied to a component or the like that peels only the paint film layer 40c.

10 Molded product to be coated (molded product before painting)
20 Painted molded product (molded product with coating)
30 Coating masking jig 40a Base layer 40b of coated molded product Chemical conversion treatment layer 40c of coated molded product 50 Coating film layer 50 of coated molded product Laser processing device 60 Laser light 70 Predetermined part for peeling only coating film layer or masking is required A predetermined part is shown.

Claims (3)

  The laser beam 60 can be irradiated to the predetermined portion 70 on the flat surface or the side wall surface of the laser beam machine 50 and the coated molded product 20 by peeling the coating film layer 40c of the predetermined portion 70 by ablation by irradiation of the laser beam 60. An automatic coating film peeling apparatus using a laser comprising an automatic tilting table having a function of   An automatic supply device for supplying the coated molded product 20 to the automatic tilting table, a device for collecting fine powder of the coating film layer 40c generated during the ablation phenomenon, and an automatic tilting table for the coating film peeled product of the coated molded product 20 The automatic paint film peeling apparatus by a laser according to claim 1, further comprising an automatic take-out device for taking out more. The automatic coating film peeling apparatus by a laser according to claim 1, further comprising an image processing device for judging a processing quality of a coated film peeling processed product obtained by peeling off the coating film layer 40c at a predetermined portion 70 of the coated molded article 20.