WO2014016941A1

WO2014016941A1 - Method for repairing pc light covers

Info

Publication number: WO2014016941A1
Application number: PCT/JP2012/069011
Authority: WO
Inventors: 西田誠宏
Original assignee: 岩本宏憲
Priority date: 2012-07-26
Filing date: 2012-07-26
Publication date: 2014-01-30
Also published as: JP5908980B2; JPWO2014016941A1

Abstract

The present invention provides a method that makes possible the repair of PC light covers without requiring expertise and an orbital sander capable of easily performing grinding and polishing work. This method for repairing PC light covers that makes the surface of deteriorated PC light covers substantially transparent similar to the initial state is characterized in comprising: a masking process for covering the peripheral non-surface parts of the light cover; a grinding process, after the masking process, for installing sandpaper on an orbital sander in which a substantially hexagonal sliding surface moves eccentrically to grind the surface of the light cover and removing the clear coating film that forms the surface of the light cover; a polishing process of polishing the surface of the light cover after the grinding process by applying a liquid compound on a buff; and as a final process, a coating process of coating the surface of the light cover with a coating agent.

Description

Repair method of PC light cover

The present invention relates to a repair method for a PC light cover.

Conventionally, polycarbonate (PC) light covers such as automobile headlights, street lights, and floodlights used outdoors are exposed to ultraviolet rays, raindrops, ambient temperature, light on / off, thermal expansion / contraction difference due to light extinction, etc. It causes discoloration and cloudiness over time due to the influence of. This is known to occur when an acrylic resin, which is a clear paint coated on the PC surface, which is the base of the light cover, deteriorates over time due to the above factors and the like.

The demand for returning (repairing) the surface of the light cover made of PC with such discoloration to the initial state without discoloration has spread more widely to general consumers than street lights and floodlights. In response to this, various methods have been implemented in the automobile industry. For example, the method of Patent Document 1 is disclosed.

In Patent Document 1, a clear paint with a discoloration coated on the PC surface is removed with sanding paper or the like, and several kinds of materials are applied thereon to obtain a new high surface hardness. Moreover, in the repair work of the headlight cover performed not only in Patent Document 1 but in the automobile industry, sanding is performed in order to remove the discolored clear coating that forms the surface and to make the surface unevenness smooth and uniform. Polishing and polishing while changing the grain size of paper or compound in stages is a well-known technique.

In the repair work as described above, except for personal and home use, in the polishing and polishing processes, tools such as orbital sander and polisher are used to improve the finished quality and shorten the work time. Yes. The orbital sander has been improved such as having a dust collection mechanism as shown in Patent Document 2, and in many cases, the sliding surface is a quadrangle, and in order to improve the handling of the tip as a part of the product An iron-shaped sliding surface has been put into practical use (manufactured by BOSCH: PSM80A, etc.).

Japanese Patent No. 3756740 JP-A-8-281546

However, the repair method described above requires a certain level of skill in using the tool. In particular, since the PC, which is the base of the light cover, is low in heat resistance and is a soft material, if a polisher whose sliding surface rotates is used, if the polished surface is in contact with the same part for a certain period of time, Deformation will occur. Furthermore, in order to prevent this, if the sliding surface is moved quickly, there is a difficulty in handling such that the surface is likely to be deeply scratched.

Further, even if it is desired to uniformly polish and polish the entire surface of the light cover, in the case of a special convex portion on the surface of the light cover or a shape having corners on the outer periphery of the light cover, etc. With an orbital sander having a square sliding surface or a polisher having a circular sliding surface, polishing of the portion cannot be sufficiently performed as compared with other portions. In addition, when the polisher is used, the sanding paper comes into contact with a region other than the corners that is not to be polished, and there is a problem that the sanding paper is deteriorated quickly or an unintended portion is damaged. In addition, in the orbital sander having a rectangular sliding surface, there is a difficulty in handling such that the corner portion of the headlight cover must be polished using the left or right corner portion of the tip portion of the sliding surface, Even those familiar with the use of tools are not easy tasks.

In order to deal with such problems, it is effective to use an iron-shaped orbital sander at the tip of the sliding surface, but even in this case, if the orbital sander is turned while performing polishing etc. However, since the rear part interferes with parts other than the target part such as polishing, there is a problem in handling the rear end part, and a certain level of skill is still required in use.

In addition, in the orbital sander with a sliding surface of a square or iron shape, the portion that can be used as the sliding surface is limited, so if you want to perform polishing etc. in a direction different from the direction in which the orbital sander is moving, etc. In addition, it is necessary to change the holding part of the orbital sander and to hold it again. This is particularly troublesome when polishing an object having a complicated surface shape.

The present invention has been made in view of the circumstances as described above, and can easily perform a method of repairing a light cover made of PC without requiring skill, and polishing and polishing operations. To provide an orbital sander.

In order to achieve the above object, the present invention provides the following.

The invention according to claim 1 is a repair method for a PC light cover in which the surface of a deteriorated PC light cover is substantially transparent close to the initial state, and masking covers an outer peripheral portion other than the surface of the light cover. Removing the clear paint film forming the surface of the light cover by attaching sanding paper to the orbital sander in which the substantially hexagonal sliding surface moves eccentrically to polish the surface of the light cover after the masking step A polishing step of polishing the surface of the light cover with a liquid compound after buffing, and a coating step of coating the surface of the light cover with a coating agent as a final step. Repair method of PC light cover.

In the invention according to claim 2, the method for repairing a light cover made of PC according to claim 1, wherein the brushing step uses a short buff having a bristle length of 0.7 mm to 1.3 mm. .

In the invention according to claim 3, the polishing step uses the orbital sander in which a substantially hexagonal sliding surface moves eccentrically. The light cover made of PC according to

claim

1 or 2, Repair method.

According to a fourth aspect of the present invention, the sliding portion mounted eccentrically with respect to the drive shaft by the rotational movement of the drive shaft used in the method for repairing a PC light cover according to the first aspect performs an eccentric motion. An orbital sander, wherein the sliding surface of the sliding part has a substantially hexagonal shape.

According to a fifth aspect of the present invention, there is provided a pad as a cushioning material to be attached to a sliding surface of the sliding portion used in the orbital sander according to the fourth aspect, wherein the pad has a shape that is the same as the sliding surface. An orbital sander pad characterized by a substantially hexagonal shape having substantially the same shape.

According to the present invention, since the sliding surface of the orbital sander is substantially hexagonal, only the corner portion without contacting the tip portion that is the apex with respect to the corner portion of the surface of the light cover without contacting the range not to be polished. Can be polished, and repair work can be easily performed without requiring skill in handling.

In addition, the sliding surface of the orbital sander is substantially hexagonal, and the rear part of the sliding surface is formed inward toward the rear end that is the top of the orbital sander. When polishing while rotating, the rear part does not come into contact with other parts not to be polished, so that the handling becomes easy and the repair work can be performed without requiring skill.

In addition, even a light cover with a convex part can be operated while aligning the tip of the orbital sander, which is the apex of the substantially hexagonal sliding surface, with the boundary part of the convex part. By protruding from the sliding surface into a substantially L shape, polishing work can be easily performed on the boundary part of the convex part and the rising part from the boundary part, and skill in handling is required. No.

In addition, since the sliding surface of the orbital sander is substantially hexagonal, many parts including the side surface of the sliding surface can be used as a sliding surface in multiple ways, so it can be flexibly applied to objects having various shapes. In addition to being able to cope with this, it is possible to perform polishing or the like without having to re-hold and hold the orbital sander in any direction, thereby improving work efficiency.

In addition, the orbital sander does not rotate on the sliding surface itself, but is an eccentric motion. Therefore, the orbital sander is less susceptible to deformation and other problems even with a PC having a small turning radius and low resistance to heat. It can be used without requiring a degree.

Also, by using the corners of the sanding paper so that it is aligned with the apex of the tip of the pad, the four corners of the sanding paper can be used evenly, and the sanding paper can be used effectively, which is economically advantageous.

It is a flowchart of the repair method of the light cover made from PC which is embodiment which concerns on this invention. It is a flowchart of the polish process of the light cover made from PC which is embodiment which concerns on this invention. It is the schematic which shows the internal structure example of an orbital sander. (A) It is a side view of the orbital sander of embodiment which concerns on this invention. (B) It is a bottom view of the orbital sander of embodiment which concerns on this invention. (A) It is the schematic which shows the eccentric orbit of an orbital sander. (B) It is the schematic which shows typically the eccentric track | orbit of the orbital sander of embodiment which concerns on this invention. (A) It is the side view which showed the orbital sander of embodiment which concerns on this invention, and other members. (B) It is a bottom view which shows a mode that sanding paper etc. were mounted | worn with the orbital sander of embodiment which concerns on this invention. (A) It is the schematic which showed the effective use area | region of sanding paper. (B) It is the schematic which shows the sheet | seat state before the division | segmentation process of the pad used for the orbital sander of embodiment which concerns on this invention. It is the schematic which shows the use condition to the headlight cover corner | angular part of the orbital sander of embodiment which concerns on this invention. (B) It is the schematic which shows the use condition to the light cover outer peripheral part of the orbital sander of embodiment which concerns on this invention. (A) It is a bottom view which shows a mode that sanding paper etc. were shifted and mounted | worn to the orbital sander of embodiment which concerns on this invention. (B) It is the schematic which showed how to apply the convex part of a headlight cover, and the sanding paper etc. to the said part. (A), (b), (c) It is a part of side view and bottom view which show three types of rocking | fluctuation plates of the orbital sander of embodiment which concerns on this invention. (A), (b), (c) It is the perspective view which showed the headlight which has three types of characteristic shapes. (A) It is the side view which showed the orbital sander of embodiment which concerns on this invention, and other members. (B) It is a bottom view which shows a mode that the buff etc. were mounted | worn with the orbital sander of embodiment which concerns on this invention. (A) It is a top view which shows the modification of the pad for orbital sanders of embodiment which concerns on this invention. (B) It is the schematic of the modification of the pad for orbital sanders of embodiment which concerns on this invention.

The gist of the present invention is a masking step for covering the outer peripheral portion other than the surface of the deteriorated polycarbonate (PC) light cover, and an orbital sander in which the substantially hexagonal sliding surface is eccentrically moved to polish the light cover surface. A polishing process that removes the clear paint film that forms the light cover surface by attaching sanding paper, a polishing process that polishes the light cover surface with a liquid compound in a buff, and a coating process on the light cover surface as the final process. A method of repairing a PC light cover including a coating step. In other words, a repair method for a PC light cover that makes the surface of the PC light cover deteriorated without requiring a high degree of skill almost transparent in the initial state, and an orbital that can be easily polished and polished. It is about Sanda.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a repair method related to the headlight cover surface of an automobile with the most construction examples as a repair work of a PC light cover will be described. However, the present invention is not limited to this embodiment, and is manufactured by a PC. In the case of the light cover, street lights, projectors and the like belong to the scope of the present invention.

FIG. 1 shows a work flow in the present embodiment. This repair method includes a cleaning step S101, a masking step S102, a polishing step S103, a polishing step S104, a degreasing step S105, and a coating step S106.

[Washing process]
In the cleaning step S101, the surface of the target headlight cover 10 is visually confirmed. If the surface is dirty, the dirt is removed with a waste cloth containing moisture. If the work is performed with dirt attached, it causes clogging of the polishing surface 9 of the sanding paper 7 used in the polishing step S103 described later, and the deterioration is accelerated. Therefore, it is desirable to remove the dirt as much as possible. In particular, in the case where a solid matter is attached, care must be taken because there is a possibility that deep scratches originating from the solid matter may be generated on the surface of the headlight cover 10 in the polishing step S103. In addition, since moisture remaining on the surface of the headlight cover 10 may cause adhesion of foreign matter, it is desirable to remove it with a dry waste or the like.

The cleaning step S105 can be omitted if the surface of the headlight cover 10 is not dirty as described above.

[Masking process]
In the masking step S102, an outer peripheral portion other than the surface of the target headlight cover 10 is covered with a material such as a masking tape in which a paste material is applied to Japanese paper or vinyl material, thereby covering the headlight cover 10 described later. This is to prevent scratches and the like from affecting unintended portions other than the surface during work on the surface.

In the vicinity of the outer periphery of the headlight, since the sanding paper 7 is easy to contact, it is desirable that two to four masking tapes are laminated and pasted. In order to prevent abrasive powder from adhering to the body of the car as much as possible, a masking sheet made of polyethylene or kraft paper is applied to the outer periphery of the masking tape to cover a wide area of the body. Also good. If the masking tape is adhered to the body for a long period of time, there is a risk that the painted surface of the body will be peeled off at the same time. It is necessary to peel off.

[Polishing process]
In the polishing step S <b> 103, the acrylic resin, which is a clear coating having a discolored surface of the PC that is the base of the headlight cover 10, is removed by the sanding paper 7. If the clear paint cannot be completely removed, care should be taken because deterioration such as discoloration proceeds starting from the remaining clear paint.

In the polishing step S103, the orbital sander 1 is used as a tool. The orbital sander 1 is one in which a rocking plate 2 that is a sliding portion is a circular orbital motion, that is, an eccentric motion (orbital motion), and is driven by electricity or air.

FIG. 3 shows a schematic structure of a general orbital sander driven by electricity. When the power cord 20 of the orbital sander is connected to the outlet and the switch 21 is turned on, the current converted from AC to DC by the AC-DC converter 22 is input to the motor 24 through the wiring 23 and the motor 24 rotates. The eccentric bracket 26 connected to the rotating drive shaft 25 also rotates in the same manner. The eccentric bracket 26 is provided with an eccentric shaft 28 provided on the outer periphery with a bearing 27 serving as the center of the eccentric shaft at a position away from the rotation center of the eccentric bracket 26, and the eccentric shaft 28 corresponds to the rotation of the eccentric bracket 26. Revolves around the center of rotation of the eccentric bracket. Further, the eccentric shaft 28 itself is configured not to rotate by providing the bearing 27. Therefore, the swing plate 2 which is a sliding portion connected to the swing base 29 via the swing base 29 connected to the eccentric shaft 28 performs an eccentric motion. In this case, the eccentric bracket 26 The distance between the rotation center (drive shaft center) and the center of the eccentric shaft 28 is the rotation radius r in the eccentric motion.

The orbital sander 1 according to the present embodiment operates with the above-described structure, but the structure, power source, and the like are limited to the present embodiment as long as the above-described eccentric motion is possible. It is not something.

FIG. 4A shows the orbital sander 1 according to this embodiment, and the shape of the sliding surface 3 of the rocking plate 2 that is the sliding portion of the orbital sander 1 is as shown in FIG. The rear end is a triangular shape with the front end sharpened and the front end portion 4 having the front left and right inclined sides 30 as the apex, the middle portion is of equal width, the rear side is sharp at the rear end, and has the rear left and right inclined sides 31 It is a substantially hexagonal shape in plan view formed in a triangular shape with the portion 5 as a vertex. The apex angle α of the front end 4 and the apex angle β of the rear end 5 are both 90 ° or less. By attaching the pad 6 to the sliding surface 3 and the sanding paper 7 thereon, the eccentric movement of the polishing surface 9 of the sanding paper 7 gives a frictional force to the layer on the surface of the headlight cover and becomes a polishing force. In the orbital sander 1 according to the present embodiment, the intermediate portion has a uniform width, but the orbital sander 1 is not limited to a uniform width as long as the sliding surface 3 has a substantially hexagonal shape.

Further, as the material of the swing plate 2, the pad 6 mounted on the rocking plate 2 itself has elasticity, so there is no particular problem whether it is a metal or a rubber material. In order to reduce the influence of unintended contact, it is desirable to use a rubber material.

FIG. 5 (a) shows a schematic image of the locus of the eccentric motion when the orbital sander 1 is moved diagonally downward to the right. FIG. 5 (b) schematically shows the locus of the eccentric motion of the tip 4 of the orbital sander 1 at this time. As described above, since the distance between the rotation center (drive shaft center) of the eccentric bracket 26 and the center of the eccentric shaft 28 is the rotation radius r in the eccentric motion, the rocking plate 2 is slid unless the orbital sander 1 itself is moved. The moving range is narrow.

Regarding the mounting of the pad 6 and the sanding paper 7, as shown in FIG. 6A, the surface fastener 8 a provided on the entire sliding surface 3 of the swing plate 2 and the sliding surface 3 of the swing plate 2. The pad 6 is affixed to the sliding surface 3 by means of a hook-and-loop fastener 8b provided on the entire back surface of the substantially hexagonal pad 6 having substantially the same shape as the above. In this case, the oscillating plate 2 and the pad 6 are pasted so that all the apexes of the substantially hexagonal shape overlap each other. Furthermore, a hook-and-loop fastener 8c is also provided on the entire surface of the pad 6, and is attached to the pad 6 by a hook-and-loop fastener 8d provided on the entire back surface of the square sanding paper 7. In this case, as shown in FIG. 6B, the corner portion of the sanding paper 7 is aligned with the apex of the tip portion 4 of the pad 6. Depending on the state of the back surface of the sanding paper 7, the surface fastener 8c on the surface of the pad 6 can be attached even if the surface fastener 8d is not provided on the back surface.

In this case, the sanding paper 7 can be used evenly around the four corners of the sanding paper 7 as shown in FIG. 7A by aligning the corners with the apexes of the tip 4 of the pad 6. Paper can be used effectively and is economically advantageous.

In the present embodiment, the pad 6 is mounted on the sliding surface 3 of the swing plate 2. However, the cushioning plate 2 is intended to be used for another cushioning material or polishing between the sliding surface 3 and the pad 6. A rubber material or the like for securing the height from the actual polishing surface or the like may be mounted so as not to contact the portion that is not.

Since the normal orbital sander has a rectangular sliding surface, four corners can be used. However, the orbital sander 1 according to this embodiment uses six corners because the sliding surface 3 is substantially hexagonal. can do. Further, as shown in FIG. 4B, six sides of the front left and right inclined sides 30, the middle left and right opposing sides 38, and the rear left and right inclined sides 31 can be used. Further, as shown in FIGS. 9 (a), the pad 6 and the sanding paper 7 are also attached to the left and right front side surfaces 32, the left and right inner side surfaces 33, and the left and right rear side surfaces 34 other than the sliding surface 3 of the swing plate 2 as shown in FIG. A sliding surface that is effective for polishing can be obtained by mounting with a shift. Therefore, while the normal orbital sander can use four side surfaces, the orbital sander 1 according to the present embodiment can use six side surfaces. Therefore, in the orbital sander 1 according to the present embodiment, 19 locations including the sliding surface 3, which is the bottom surface of the rocking plate 2, each side, and each corner portion are used as effective sliding portions. Therefore, it is possible to flexibly cope with a polishing object having various shapes as will be described later, as compared with 13 ordinary orbital sanders.

Further, when the gripping portion 35 of the orbital sander 1 is gripped and polished, many sliding portions can be used as described above, so that the gripping direction of the gripping portion 35 does not change depending on the shape of the object to be polished and the polishing location. It can be flexibly adapted to various shapes while being held once, and workability can be improved.

Next, an actual polishing method using the orbital sander 1 will be described. First, the pad 6 attached to the sliding surface 3 of the orbital sander 1 serves as a buffer material between the surface of the headlight cover 10 and the orbital sander 1 during the polishing operation and during the polishing operation in the polishing step S104 described later. . Further, it is desirable to appropriately use two types of pads 6, soft pad 6a and hard pad 6b.

Since the pad 6 is substantially the same shape as the sliding surface 3 of the rocking plate 2 of the orbital sander 1 and has a substantially hexagonal shape in plan view, when the pad 6 is divided into individual pads 6 when the pad 6 is manufactured, FIG. As shown in (b), it is possible to divide a plurality of pads 6 so as to be arranged adjacent to each other without a gap, thereby generating less unnecessary pad material, which is economically advantageous. .

The hard pad 6b can be made of an elastic material such as urethane, NBR, silicon, fluorine, etc., and has a hardness of about “8” (rubber hardness meter Asker Type C). The soft pad 6a is made of urethane foam, polyvinyl acetal, Sponge materials such as melamine foam and polyethylene foam can be used, and those having a hardness in the range of 70 to 170 N / 314 cm ² are desirable.

The sanding paper 7 to be attached to the surface of the pad 6 is properly used depending on the deterioration state of the headlight cover 10 surface, but the deterioration state can be roughly classified into three. First, the first classification is the case where the entire surface of the headlight cover 10 is yellowed. In principle, the sanding paper 7 is used in the order of 280 → 360 → 600 → 1300 → 3000. As for the pad 6, the hard pad 6b is used when the 280 sanding paper 7 is used, and the soft pad 6a is used thereafter.

The second category is mainly for Japanese cars where the clear paint on the surface of the headlight cover 10 is peeled off or cracked. As a rule, sanding paper in the order of 360 → 600 → 1300 → 3000 7 and all the pads 6 use the soft pads 6a.

The third category is the case of imported cars other than Japanese cars where the clear paint on the surface of the headlight cover 10 is peeled off or cracked. As a general rule, 280 → 360 → 600 → 1300 → Sanding paper 7 is used in the order of number 3000, and all the pads 6 use soft pads 6a.

In the present embodiment, each count of the sanding paper as described above is used. However, changing the count depending on the deterioration state or the presence or absence of the matching sanding paper is normally performed and is within the scope of the present invention. .

In the present embodiment, the two

pads

6a and 6b as described above are used properly, but can be changed depending on the deterioration state, the skill level, etc., and the present invention is not limited to the present embodiment.

The front end portion 4 and the rear end portion 5 of the pad 6 are more likely to deteriorate than other portions because they are particularly frequently used. Further, there are cases where it is desired to make the angles α and β of the

tip end portions

4 and 5 of the pad, etc., acute according to the range to be polished. In such a case, as shown in FIG. 13A, it is possible to use a separable pad 6c in which one or

more cut lines

40a, 40b, 41a, 41b, 42a, 42b, 43a, 43b are formed.

In the case of the separable pad 6c, even when the front end portion 4 or the rear end portion 5 is deteriorated, it is cut off at the front end

regeneration cutting lines

40a and 40b or the rear end

regeneration cutting lines

41a and 41b so as to be substantially V-shaped. By removing the end side 45, it is possible to obtain a playback pad 46 in which a new playback front end 4a and a playback back end 5a are formed in a portion where deterioration has not progressed much. Further, as shown in FIG. 13 (b), by cutting off the substantially acute V-shaped end side 45 by cutting off at the leading edge acute

angle cutting lines

42a, 42b or the trailing edge acute

angle cutting lines

43a, 43b, It is possible to obtain a reproduction pad 46 in which a reproduction leading end 4a and a reproduction trailing end 5a having a new angle α which is newer than the initial angles α and β are newly formed in a portion where the deterioration has not progressed so much.

As described above, if the separable pad 6c is used, it is possible to extend the life of the usable pad, which is economically advantageous. Further, even when the polishing target range is narrow, it is possible to flexibly cope with one pad.

It should be noted that the arrangement of such cut lines is not particularly limited to the configuration described above.

In the polishing operation, the entire surface of the headlight cover 10 is uniformly polished. The pressing force of the sanding paper 7 at this time is performed within the elastic range of the pad 6 so that the force applied to the sliding surface 3 of the orbital sander 1 is not directly transmitted to the surface of the headlight cover 10. In this case, it is desirable that the moving speed of the orbital sander 1 is within a range of 20 to 60 mm / sec.

Since the base material of the headlight cover 10 is a soft material with low heat resistance, when using a polisher whose sliding surface rotates, the headlight cover is in contact with the same part for a certain period of time. Will be deformed. Furthermore, if the sliding surface 3 is moved quickly in order to prevent this, it is difficult to handle such as deep scratches on the surface. On the other hand, the orbital sander 1 does not rotate the sliding surface 3 itself, so the rotational radius due to the eccentric motion is small, does not have the problems that the polisher described above has, and requires skill. Can be used without

Since the orbital sander 1 has the substantially hexagonal sliding surface 3, it can prevent the tip 4, which is the apex thereof, from coming into contact with a non-polishing area. Therefore, the corner portion 11 on the surface of the headlight cover 10 as shown in FIG. 8A can be polished using the front end portion 4 and the rear end portion 5 of the orbital sander 1. Furthermore, the narrow portion 36 having a sharp corner as shown in FIGS. 11 (a) and 11 (b) and the surface of the concave curved portion 37 on the lower side as shown in FIG. 11 (c) One of the orbital sanders 1 can be tilted and floated and polished on the front end 4 side or the rear end 5 side.

Further, in the orbital sander 1, the sliding surface 3 has a substantially hexagonal shape, and the rear portion of the sliding surface 3 is formed inward toward the rear end portion 5 which is the apex thereof. As shown, the outer peripheral portion of the headlight cover 10 can be polished while turning the orbital sander 1 without the rear portion coming into contact with the non-polishing range during turning.

FIG. 9B shows a headlight cover 10 of a type in which the headlight cover 10 and the winker or the like are integrated. The winker or the like has a convex portion 12 with respect to the entire headlight cover. In such a case, the pad 6 and the sanding paper 7 are obliquely upward with respect to the boundary portion 13 of the convex portion 12 so as to protrude from the sliding surface 3 as shown in FIG. 9B, as shown in FIG. 9B, the convex portion 12 is formed by a substantially L-shaped portion 14 formed by a protruding portion by the front side surface 32 and the sliding surface 3 of the distal end portion 4. The boundary portion 13 and the rising portion from the boundary portion 13 can be polished. Furthermore, the curved surface of the convex portion 12 can be polished using the tip portion 4. Thus, when the object is polished, the front side surface 32, the inner side surface 33, and the rear side surface 34 of the swing plate 2 can be effectively used as sliding surfaces.

In the orbital sander 1, the sliding surface 3 has a substantially hexagonal shape, and the tip 4, which is the apex of the orbital sander 1, can be easily aligned with the boundary portion 13 of the convex portion 12. Does not require skill.

Furthermore, the shape of the tip portion 4 and the rear end portion 5 of the swing plate 2 of the orbital sander 1 is such that the tip of the swing plate 2a is downwardly sharpened as shown in FIG. What was formed in can be used. Further, as shown in FIG. 10 (b), the tip of the swing plate 2b is formed to have a sharp tip with a convexly curved inclined surface downward, or as shown in FIG. 10 (c). It is also possible to use the moving plate 2c having a tip sharpened with a concave curved inclined surface downward.

The three types of shapes described above (FIGS. 10A, 10B, and 10C) are formed on the front end 4 side or the rear end 5 side of the swing plate 2 or on both sides. The formation and the combination thereof are arbitrary.

In the case of the orbital sander 1 having the rocking plate 2a shown in FIG. 10A, the other side is floated while contacting the surface of the headlight cover 10 with the front end 4 and the rear end 5 of the orbital sander 1 as the lower side. By tilting and polishing, even a narrow portion 36 as shown in FIGS. 11A and 11B can be polished more stably.

Further, in the case of the orbital sander 1 having the rocking plate 2b shown in FIG. 10 (b), the rocking plate 2b of the rocking plate 2b is also below the surface of the concave curved portion 37 as shown in FIG. 11 (c). It is possible to polish more stably by lifting and tilting the other side while contacting the surface of the headlight cover 10 with the front end portion 4 and the rear end portion 5 as the lower side, and polishing.

Further, in the case of the orbital sander 1 having the rocking plate 2c shown in FIG. 10 (c), the rocking is also performed with respect to the surface of the convex portion 12 which is a curved surface portion having a small curvature radius as shown in FIG. 9 (b). It is possible to polish more stably by lifting and tilting the other side while contacting the surface of the convex portion 12 with the front end portion 4 and the rear end portion 5 of the plate 2c as the lower side and contacting the surface.

The sanding paper 7 can be used continuously to the extent that no buffs (fine work scratches) are generated, but if it is used beyond that, the desired quality cannot be stably reproduced, so replacement is necessary. At the time of replacement, it is desirable to replace all the count sanding papers 7 at the same time in order to obtain a stable finish without requiring skill. Specifically, it is desirable to use up to two new sanding papers 7 (four headlight covers).

At the end of each polishing operation using sanding paper 7 with each count, the whole is uniformly white for 280, and the interior of the headlight is slightly visible for 360 and 600 In the case of No. 1300, the inside of the headlight can be visually recognized relatively clearly, and in the case of No. 3000, the entire inside of the headlight can be clearly seen. Further, it is necessary that no deep scratches remain on the surface of the headlight cover 10 in all the counts, and further, there should be no visible buffing region for Nos. 1300 and 3000.

It is desirable that the orbital sander 1 is moved slowly at the moving speed as described above in order to stably obtain a good finished quality. In addition, if the polishing powder accumulates on the surface of the headlight cover 10, not only will the clogging of the polishing surface 9 of the sanding paper 7 occur, but the polishing powder may agglomerate and cause deep scratches. It is desirable to remove the polishing powder deposited on the surface of 10 as appropriate.

[Polishing process]
The polishing step S104 further improves the transparency of the surface of the headlight cover 10 polished in the polishing step S103, and is the final operation for determining the state of the PC base on the surface of the headlight cover 10. Further, since the polishing work uses three kinds of liquid compounds having different particle sizes, as shown in FIG. 2, the polishing work includes three stages of work from the first polishing work S201 to the third polishing work S203.

As shown in FIGS. 12 (a) and 12 (b), a substantially hexagonal pad 6 is attached to the substantially hexagonal sliding surface 3 of the orbital sander 1 used in the polishing step S103, and a rectangular cloth shape is formed thereon. Paste a new buff 15. As long as the buff 15 covers the entire surface of the pad 6, the attaching position is not particularly problematic.

Specifically, the surface fastener 8a provided on the entire surface of the sliding surface 3 of the rocking plate 2 and the entire back surface of the substantially hexagonal pad 6 having substantially the same shape as the sliding surface 3 of the rocking plate 2. The pad 6 is affixed to the sliding surface 3 by the hook-and-loop fastener 8 b provided on the sliding surface 3. In this case, the oscillating plate 2 and the pad 6 are pasted so that all the apexes of the substantially hexagonal shape overlap each other. Furthermore, a hook-and-loop fastener 8c is also provided on the entire surface of the pad 6, and is attached to the pad 6 by a hook-and-loop fastener 8e provided on the entire back surface of the square buff 15. The buff 15 can be attached by the surface fastener 8c on the surface of the pad 6 even if the surface fastener 8e is not provided on the back surface depending on the material used.

It should be noted that the description of the common parts such as the structure, advantages and usage of the orbital sander 1 will be omitted as appropriate.

Since the liquid compound attached to the buff 15 easily permeates and adheres to the pad 6 and deteriorates quickly, the pad 6 that cannot be used in the above-described polishing step S103 may be used in the polishing step S104. The pad is preferably the soft pad 6a, but the hard pad 6b can also be used. Also, the above-described splittable pad 6c can be used.

The buff 15 is made of animal fibers such as wool, plant fibers such as cotton, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, synthetic fibers such as polyester, or a combination of these. Use short hair buffs of 0.7mm to 1.3mm. In particular, it is desirable to use a felt-like buff 15 by crimping.

Since a wide range of materials can be used for the buff 15 as long as they are in the above range, an inexpensive material can be used as appropriate. This makes it disposable, so using expensive buffs like conventional ones can prevent defects such as solid matter sticking to the hair and causing scratches, and material and quality control Becomes easy.

In polishing work, the entire surface of the headlight cover 10 is uniformly polished. The pressing force of the buff 15 at this time is performed within the elastic range of the pad 6 so that the force applied to the sliding surface 3 of the orbital sander 1 is not directly transmitted to the surface of the headlight cover 10. In this case, it is desirable that the moving speed of the orbital sander 1 is within a range of 20 to 60 mm / sec.

In the first polishing operation S201, a liquid liquid whose main abrasive is alumina having a center particle diameter of 10 to 12 μm is used as a compound, and an amount of about 1 red bean is attached to the polishing surface 16 of the buff 15 to obtain an orbital sander 1 Spread the surface of the headlight cover 10 over a wide range without turning on the power, etc., and then operate the orbital sander 1 to polish the entire surface until the buffing is invisible and the compound residue is invisible. Later, the surface of the headlight cover 10 is wiped with a dry cloth.

It should be noted that the amount of the compound should be as small as possible because the compound has the most efficient polishing power when it is almost dry. If the buffing does not disappear in the first polishing operation S201, the process returns to the above-described polishing step S103 and starts again from the count of the sanding paper 7 considered necessary.

The orbital sander 1 has a sliding surface 3 that is substantially hexagonal, so that the tip portion 4 that is the apex of the orbital sander 1 can be prevented from coming into contact with a region that is not polished. Therefore, the corner portion 11 on the surface of the headlight cover 10 as shown in FIG. 8A can be polished using the front end portion 4 and the rear end portion 5 of the orbital sander 1. Furthermore, the narrow portion 36 having a sharp corner as shown in FIGS. 11 (a) and 11 (b) and the surface of the concave curved portion 37 on the lower side as shown in FIG. 11 (c) One of the orbital sanders 1 can be tilted and floated and polished on the front end 4 side or the rear end 5 side. Such a method is the same in the second polishing operation S202 and the third polishing operation S203 described later.

Further, in the orbital sander 1, the sliding surface 3 has a substantially hexagonal shape, and the rear portion of the sliding surface 3 is formed inward toward the rear end portion 5 which is the apex thereof. As shown, the outer peripheral portion of the headlight cover 10 can be polished while turning the orbital sander 1 without contacting the rear portion of the outer periphery of the headlight cover 10 during polishing. Such a method is the same in the second polishing operation S202 and the third polishing operation S203 described later.

Further, as shown in FIG. 9B, the pad 6 and the buff 15 protrude from the sliding portion with respect to the boundary portion 13 of the convex portion 12 such as a winker as shown in FIG. 9B. The boundary part 13 of the convex part 12 and the boundary are formed by a substantially L-shaped part 14 formed by the front side surface 32 of the tip part 4 and the sliding surface 3 protruding from the front side 32 and the sliding surface 3. The rising part from the part 13 can be polished. Further, the curved surface of the convex portion 12 can be polished using the tip portion 4. When the object is polished as described above, the front side surface 32, the middle side surface 33, and the rear side surface 34 of the swing plate 2 can be effectively used as sliding surfaces. Such a method is the same in the second polishing operation S202 and the third polishing operation S203 described later.

The usage method of the orbital sander 1 having three different shapes at the front end portion 4 and the rear end portion 5 of the swing plate 2 as described above is similar to the method described in the polishing step S103 described above with reference to FIG. A polishing operation can also be performed on the headlight cover 10 as shown in a), (b), and (c). Such a method is the same in the second polishing operation S202 and the third polishing operation S203 described later.

The second polishing operation S202 is an operation for making the smooth surface state formed in the first polishing operation S201 a smoother state. Use a liquid compound whose main abrasive is alumina with a center particle size of 6-8μm as the compound, and attach about 1/2 azuki beans to the polished surface 16 of the new buff 15 to power the orbital sander 1, etc. Spread the surface of the headlight cover 10 over a wide area without putting it in, and then operate the orbital sander 1 to polish the entire surface until no compound residue is visible. After finishing the work, dry the surface of the headlight cover 10 with a dry cloth. Wipe off.

It should be noted that the amount of the compound should be as small as possible because the compound has the most efficient polishing power when it is almost dry.

In the second polishing operation S202, no great difference is seen in the finished state as compared with the first polishing operation S201, but it cannot be omitted because it affects the finishing of the final third polishing operation S203 described later.

The third polishing operation S203, which is the final operation of the polishing step S104, is an operation for finishing the smooth surface state formed in the second polishing operation S202 to a surface state close to a new product having a glossy depth. Use a liquid compound with alumina as the main abrasive with a center particle size of 4 to 6 μm as the compound, and attach a liquid compound in the amount of about 1/3 of the red beans to the polished surface 16 of the new buff 15 to create an orbital sander 1 The surface of the headlight cover 10 is spread over a wide range without turning on the power, and then the orbital sander 1 is operated to polish the entire surface until no compound residue is visible. Finally, the surface is wiped with dry waste, and the polishing step S104 is completed.

The center particle size and amount of the compound used in the polishing step S104 described above are not limited to the present embodiment. Further, the compound may be directly adhered to the surface of the headlight cover 10 and then the polishing work may be performed. Further, the tool used in the polishing step S104 may use a polisher. In this case, the selection of the pad 6 and the buff 15 and others are the same as described above.

[Degreasing process]
The degreasing step S105 is for removing the oil and the like contained in the compound and improving the adhesion between the coating agent described later and the headlight cover 10 surface. An appropriate amount of a household neutral detergent or an aqueous degreasing agent that does not affect the PC is applied to the waste to wipe the entire surface of the headlight cover 10, and then a residue such as detergent is wiped off with a dry waste.

In addition, degreasing process S105 can be abbreviate | omitted when the oil component etc. are removed by polishing process S104 before that.

[Coating process]
In the coating step S106, a separate overcoat layer is formed as an alternative film for the clear coating removed from the surface of the headlight cover 10 in the above-described step. As an alternative film for acrylic resin, which is a clear coating, it is desirable to use a water-soluble, one-part glass coating agent.

As the work, apply an appropriate amount of glass coating agent to a clean waste cloth and spread it evenly over the entire surface of the headlight cover 10.

By performing the cleaning step S101 to the coating step S106 as described above, the PC light cover, which has been discolored or clouded over time, can be made to look like a new one. In step S104, by using the orbital sander 1 having the substantially hexagonal sliding surface 3, it is possible to repair the PC light cover without requiring skill.

S102 Masking process S103 Polishing process S104 Polishing process S106 Coating process 1 Orbital sander 3 Sliding surface 6 Pad

6a Soft pad

6b Hard pad 7 Sanding paper 10 Headlight cover 15 Buff

Claims

A method of repairing a PC light cover that makes the surface of a deteriorated PC light cover substantially transparent close to the initial state,
A masking step for covering an outer peripheral portion other than the surface of the light cover;
A polishing step of removing a clear coating film forming a surface of the light cover by attaching a sanding paper to an orbital sander in which a substantially hexagonal sliding surface is eccentrically moved to polish the surface of the light cover after the masking step. When,
A polishing step of polishing the surface of the light cover with a liquid compound in a buff after the polishing step;
A coating step of coating the surface of the light cover with a coating agent as a final step;
A method for repairing a light cover made of PC, comprising:
The polishing step uses a short hair buff having a bristle length of 0.7 mm to 1.3 mm,
The repair method of the light cover made from PC of Claim 1 characterized by these.
The polishing step uses the orbital sander in which the substantially hexagonal sliding surface moves eccentrically,
The repair method of the light cover made from PC of Claim 1 or Claim 2 characterized by these.
The orbital sander used in the repair method of the PC light cover according to claim 1, wherein the sliding portion eccentrically attached to the drive shaft by the rotational motion of the drive shaft performs an eccentric motion,
The shape of the sliding surface of the sliding portion is substantially hexagonal;
Orbital sander characterized by
A pad as a cushioning material to be attached to the sliding surface of the sliding portion used in the orbital sander according to claim 4,
The pad has a substantially hexagonal shape substantially the same shape as the sliding surface;
A pad for orbital sander.