JP4807220B2 - Manufacturing method of mirror-coated body and mirror-coated body - Google Patents

Description

  The present invention relates to a method of manufacturing a mirror-coated body that prevents cracks caused by processing in the mirror-coated body from growing due to secular change, and a mirror-coated body manufactured by the method of manufacturing the mirror-coated body.

  In the mirror-coated body, the coating is applied to the surface or surface of the base material by making the film thickness relatively large to 100 to 200 μm or more so that the surface is sufficiently smooth without being affected by the unevenness of the surface or front and back surfaces of the base material. It is formed on the back side. For this reason, when a part such as a drill or a router is used to attach a part to a mirror-coated body, or a fixing tool such as a screw or nail is driven, a fine crack occurs in a relatively thick coating film. To do. Since the thermal expansion coefficient differs between the coating film and the base material, interlayer strain stress is applied to the coating film due to repeated temperature changes, and fine cracks eventually grow. For example, in the handle attachment portion of the door, cracks grow beyond the portion hidden by the handle cover, and an appearance abnormality occurs.

  Therefore, conventionally, the coating film part where cracks occurred during processing is removed by sandpaper and repaired in advance, but it is difficult to completely remove fine cracks, and the work is troublesome. It was hanging.

On the other hand, in Patent Document 1, in a door, a connecting edge connected to a handle cover is inserted into a groove formed in the door, a synthetic resin material is filled in the groove, and the connecting edge is embedded and fixed in the groove. Are listed.
JP-A-5-163856

However, in the door described in Patent Document 1, there is no hole formation or a process of driving in a fixing tool such as a screw or a nail for attaching the handle, so the growth of fine cracks generated in the coating film with the process There is no suggestion on how to prevent this. Moreover, because of the handle attachment of connecting edge, a groove and a synthetic resin new technical means that material has been required, it can not be attached conventional handle in the same manner as before. Further, the synthetic resin material is filled in the groove, but the filled synthetic resin material is exposed. Since the appearance is particularly important for a mirror-coated body, it is desirable to avoid exposure of a foreign synthetic resin material on the outer periphery of the handle.

  The present invention has been made in view of the circumstances as described above, and performs processing for attaching parts to a mirror-coated body, and even if a fine crack occurs in the coating film, the crack is in a certain range. An object of the present invention is to provide a method of manufacturing a mirror-coated body capable of preventing the growth beyond the scope and a mirror-coated body manufactured by the method of manufacturing the mirror-coated body.

  In order to solve the above-described problems, the method for producing a mirror-finished body of the present invention is characterized by the following.

First, a recess is formed prior to processing on the outer periphery of the surface processing portion where a hole is formed or a fixing tool is driven in the mirror surface coating body, and the coating film is divided in the recess.

  Secondly, in the above, a groove is formed as a recess at a certain distance from the outer periphery of the surface processed portion to the outside.

  3rdly, in the above, a recessed part is formed from the outer periphery of a surface process part to an outer side to a fixed distance.

  Fourth, in the above, the recess is filled with a filler.

  As a fifth aspect, the mirror-finished body of the present invention is manufactured by the method for manufacturing a mirror-finished body having any one of the first to fourth features.

  According to the first and fifth aspects of the present invention, the mirror-coated body is formed with a recess on the outer periphery of the surface processed portion prior to processing for component mounting and the like, and the coating film is divided in the recess. Therefore, even if a fine crack occurs in the coating film due to processing, the growth of the crack stops at the concave portion, and it is possible to prevent the crack from growing beyond a certain range. Parts can be attached in the same manner as before, and no special means is required. The concave portion is not exposed after the parts are attached or the like, and the appearance of the mirror-coated body is maintained well.

  According to the second and fifth aspects of the invention, in addition to the effects of the invention described above, since it is a groove, it is easy to form a recess.

  According to the third and fifth inventions, in addition to the effects of the invention described above, a concave portion is formed from the outer periphery of the surface processed portion to the outside to a certain distance, so that the occurrence of fine cracks during processing is suppressed. You can also.

  According to the fourth and fifth inventions, the bottom of the recess can be prevented from being exposed by the filler.

  FIGS. 1 <a> and <b> are respectively a main part plan view and a main part cross-sectional view showing a method for manufacturing a mirror-coated body and a first embodiment of the mirror-coated body according to the present invention.

  In the first embodiment shown in FIGS. 1 <a> and <b>, a hole is formed by a drill, a router, or the like in order to attach a surface processed portion 2, that is, a part, in the mirror-coated body 1, or a screw. The groove 3 is formed as a recess at a predetermined distance d from the outer periphery of the part to be processed, such as a nail or other fixing tool being driven, and the coating film 4 is formed in the groove 3 before the above processing. It is divided. The groove 3 can be formed by a tool such as a drill or a router. As the blade in that case, it is preferable to use a woodworking blade or a plastic blade that is less likely to cause burrs. The blade for metalwork is apt to generate burrs, and it takes time and effort to remove the burrs that come out, and the burrs are not suitable for forming the grooves 3 because they hinder the attachment of components.

  The formation position of the groove 3, that is, the constant distance d to the outer periphery of the surface processed portion 2 is a distance that is hidden by parts to be attached and is not exposed. Specifically, when the mirror-coated body 1 is, for example, a door, the part to which the handle 5 having the handle 5a is attached is covered by the cover 5b of the handle 5 and is not exposed.

  The depth of the groove 3 is a depth at which the coating film 4 can be divided, and can be a depth that reaches the thickness of the coating film 4 and further reaches the substrate 6. The width of the groove 3 is not particularly limited, and can be set to an appropriate width within a range hidden by a component or the like attached to the surface processed portion 2. The shape of the groove 3 can be determined according to the processed shape formed in the surface processed portion 2. For example, when a round hole is formed, it can be a concentric circular groove having a larger diameter than the round hole, and when a square hole is formed, it is larger than the square hole and has a similar rectangular groove. It can be.

  Such grooves 3 are formed on the surface when the mirror-coated body 1 is mirror-coated on the surface of the base material 6 and when the mirror-coated body is mirror-coated on both the front and back surfaces of the base material 6. It can be formed on both front and back surfaces of the mirror-coated body 1. The groove 3 can be filled with a filler 7 so that the bottom is not exposed. In particular, when the groove 3 reaches the base material 6, in the wooden base material 6 in which the front surface or the front and back surfaces are formed by a veneer or a solid material, the filling of the filler material 7 is to suppress deterioration of quality and the like. It becomes effective. As the filler 7, an appropriate material such as rubber, resin, hot melt, or the like can be used.

  The processing such as the formation of the holes 8 and the driving of screws, nails and the like is performed after the filling material 7 is filled when the filling material 7 is filled in the groove 3 after the formation of the groove 3 as described above. Since the coating film 4 by mirror coating is relatively thick as described above, fine cracks are generated in the coating film 4 by processing. And a crack grows by the interlayer strain stress resulting from the difference of the thermal expansion coefficient of the coating film 4 and the base material 6 with the repetition of a temperature change. However, since the coating film 4 is divided in the groove 3 formed at a certain distance d from the outer periphery to the outer periphery of the surface processed portion 2, the growth of cracks stops at the groove 3, and cracks exceed the groove 3. It does not grow outward. The portion where the crack has grown is concealed by a part or the like attached to the surface processed portion 2, and the crack is not substantially exposed. Accordingly, the appearance of the mirror-coated body 1 is maintained well. Moreover, the attachment of components can be performed in the same manner as in the past, and no special means is required.

  FIG. 2 <a> <b> are a main part plan view and a main part cross-sectional view showing a second embodiment of the method of manufacturing a mirror surface coating body and the mirror surface coating body of the present invention, respectively.

  In the second embodiment, parts that are the same as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the second embodiment shown in FIGS. 2 <a> and <b>, the concave portion 9 is formed from the outer periphery to the outer side of the surface processed portion 2 to a certain distance d prior to processing, and the coating film 4 is divided in the concave portion 9. ing. The recessed part 9 can be formed with tools, such as a drill and a router, similarly to formation of the groove | channel 3 in 1st Embodiment shown to FIG. 1 <a> <b>. The formation position of the recess 9, that is, the constant distance d to the outer periphery of the surface processed portion 2 is a distance that is hidden and not exposed by components to be attached. Specifically, when the mirror-coated body 1 is, for example, a door, the part to which the handle 5 having the handle 5a is attached is covered by the cover 5b of the handle 5 and is not exposed.

  The depth of the recess 9 is a depth at which the coating film 4 can be divided, and can be a depth that reaches the thickness of the coating film 4 and further reaches the substrate 6. The shape of the recess 9 can be determined according to the processing shape formed in the surface processing portion 2. For example, it can be formed concentrically when a round hole is formed, or rectangular when a square hole is formed.

  Such a concave portion 9 is formed on the surface when the mirror-coated body 1 is mirror-coated on the surface of the base material 6 and when the mirror-coated surface is applied on both the front and back surfaces of the base material 6. It can be formed on both front and back surfaces of the mirror-coated body 1. The recess 9 can be filled with a filler 7 so that the bottom is not exposed. In particular, when the concave portion 9 reaches the base material 6, in the wood base material 6 in which the front surface or the front and back surfaces are formed by a veneer or a solid material, the filling of the filler material 7 is to suppress deterioration of quality and the like. It becomes effective. As the filler 7, an appropriate material such as rubber, resin, hot melt, or the like can be used.

  The processing such as the formation of the holes 8 and the driving of screws, nails, etc. is performed after the filling material 7 is filled in the case where the filling material 7 is filled into the recessed portion 9 after the formation of the recessed portion 9 as described above. Since the coating film 4 by mirror coating is relatively thick as described above, fine cracks are generated in the coating film 4 by processing. And a crack grows by the interlayer strain stress resulting from the difference of the thermal expansion coefficient of the coating film 4 and the base material 6 with the repetition of a temperature change. However, since the coating film 4 is divided at the concave portion 9 formed from the outer periphery of the surface processed portion 2 to the outside to a certain distance d, the growth stops at the concave portion 9 and the crack grows outward beyond the concave portion 9. There is nothing. The portion where the crack has grown is concealed by a part or the like attached to the surface processed portion 2, and the crack is not substantially exposed. Accordingly, the appearance of the mirror-coated body 1 is maintained well. Moreover, the attachment of components can be performed in the same manner as in the past, and no special means is required.

  Moreover, in the second embodiment shown in FIGS. 2 <a> and <b>, since the concave portion 9 is formed from the outer periphery to the outer side of the surface processed portion 2 up to a certain distance d, the hole 8 in the surface processed portion 2 is formed. Even when processing such as formation or driving of screws, nails, etc. is performed, since the coating film 4 does not exist from the outer periphery of the surface processed portion 2 to the concave portion 9, it may be difficult to generate fine cracks due to processing. .

  The method for producing a mirror-coated body of the present invention exemplified above can be performed at the construction site of the mirror-coated body 1. That is, in the construction site, recesses such as grooves 3 and recesses 9 are formed on the outer periphery of the surface processed portion 2 for performing processing such as forming a hole in accordance with the attachment of the handle 5 in the case of a door, and the filler 7 is filled. In some cases, after the filling material 7 is filled in the recesses, the processing can be performed in the surface processing portion 2 of the mirror-coated body 1.

  Of course, the manufacturing method of the mirror surface coating body of this invention can also be implemented beforehand supposing the surface process part 2 in the manufacturing factory of the mirror surface coating body 1. FIG. Accordingly, the mirror-coated body of the present invention can be supplied as an industrial product.

  In addition, the manufacturing method and mirror surface coating body of the mirror surface coating body of this invention are applied especially preferably to fittings, such as an interior door and a storage door by which mirror surface coating was carried out.

  Examples are shown below.

(Example 1-3, Comparative Example 1)
A closet door was selected as the mirror finish. The closet door had a flash structure, and a face material with a thickness of 5 mm MDF was attached to the front and back of the honeycomb core material, and a natural wood veneer was attached as a surface material. The mirror coating was performed as follows.

Undercoat: Urethane paint Intermediate coat: Polyester paint Topcoat: Urethane acrylate paint (UV curing)
Coating thickness: 150 μm
The surface processed part was assumed to be a handle attaching part, and a through hole of φ5 mm was assumed to be formed.

  Prior to the formation of the through hole, a groove having a width of 1.5 mm and a depth of 1 mm was formed at a position 2 mm outside from the outer periphery of the through hole using a router in the closet door (Example 1). Hot melt was applied to the formed grooves (Example 2). Silicon resin was applied to the formed groove (Example 3). No groove was formed (Comparative Example 1).

  And the through-hole was formed with the drill for metalwork, and the handle was attached with the screw of (phi) 4.5 mm.

  A sample was prepared by cutting out the vicinity of the handle of the closet door to which the handle was attached into a 30 cm square. The periphery of the sample was chamfered with # 320 paper and then protected with aluminum tape.

  The growth of the coating film crack of each sample was evaluated by a heat shock test in which the movement between the environments at −35 ° C. for 2 hours was performed within 5 minutes after -5 ° C. for 2 hours and the movement was repeated 50 times. The evaluation results are as shown in Table 1.

実施例１−３のサンプルでは、穴表面加工部から塗膜割れが発生するが、塗膜割れの成長は２ｍｍ長であり、溝で止まり、割れが取っ手を超えなかった。割れは取っ手カバーに隠れ、外観に異常は認められなかった。一方、比較例１のサンプルでは、穴表面加工部から割れが３８ｍｍ長に成長し、取っ手カバーを超えてしまった。外観異常が確認された。
（実施例４、比較例２）
鏡面塗装体として内装ドアを選定した。内装ドアはフラッシュ構造を有し、ハニカム芯材の表裏にＭＤＦ５ｍｍ厚の面材を貼り付け、表面材として天然銘木突板を貼り付けたものとした。鏡面塗装は以下の通りに行った。

In the sample of Example 1-3, coating film cracking occurred from the hole surface processed portion, but the growth of the coating film cracking was 2 mm long, stopped at the groove, and the crack did not exceed the handle. The crack was hidden behind the handle cover, and no abnormality was observed in the appearance. On the other hand, in the sample of Comparative Example 1, the crack grew from the hole surface processed part to a length of 38 mm and exceeded the handle cover. Appearance abnormality was confirmed.
(Example 4, Comparative Example 2)
An interior door was selected as the mirror finish. The interior door had a flash structure, and a face material with a thickness of 5 mm MDF was attached to the front and back of the honeycomb core material, and a natural wood veneer was attached as a surface material. The mirror coating was performed as follows.

Undercoat: Urethane paint Intermediate coat: Polyester paint Topcoat: Urethane acrylate paint (UV curing)
Coating thickness: 150 μm
The surface processed portion was assumed to be a summing member attaching portion at the end, and a screw having a diameter of 3.5 mm and a length of 12.5 mm was screwed in. The summing member was an ABS resin molded product having a thickness of 3 mm.

  Prior to screwing, a dish-shaped recess with a diameter of 6 mm and a depth of 1.5 mm is formed on the interior door using a plastic drill, and then a pilot hole with a diameter of 2 mm and a depth of 8 mm is used in the center of the recess. (Example 4). Only pilot holes were formed (Comparative Example 2).

  A sample was prepared by cutting out the periphery of the summing member of the interior door to which the summing member was attached into a 30 cm square. The periphery of the sample was chamfered with # 320 paper and then protected with aluminum tape.

  The growth of the coating film cracks in both samples was evaluated by a heat shock test in which the movement between the environments at −35 ° C. for 2 hours was performed within 5 minutes after -5 ° C. for 2 hours and the movement was repeated 50 times. The evaluation results are as shown in Table 2.

実施例４のサンプルでは割れの発生はなく、外観は非常に良好であった。一方、比較例２のサンプルでは、下穴表面加工部から割れが３２ｍｍ長に成長し、召し合せ部材を超えてしまった。外観異常が確認された。

In the sample of Example 4, there was no cracking and the appearance was very good. On the other hand, in the sample of Comparative Example 2, the crack grew to 32 mm long from the pilot hole surface processed part, and exceeded the summing member. Appearance abnormality was confirmed.

<a> <b> are the principal part top view and principal part sectional drawing which showed 1st Embodiment of the manufacturing method of the mirror surface coating body of this invention, and a mirror surface coating body, respectively. <a> <b> are the principal part top view and principal part sectional drawing which showed 2nd Embodiment of the manufacturing method of the mirror surface coating body of this invention, and a mirror surface coating body, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mirror surface coating body 2 Surface processed part 3 Groove 4 Paint film 7 Filler 9 Recessed part

Claims (5)

In the mirror-coated body , a recess is formed prior to processing on the outer periphery of the surface processing portion where a hole is formed or a fixing tool is driven , and the coating film is divided in the recess. Production method.   2. The method of manufacturing a mirror-finished body according to claim 1, wherein a groove is formed as a recess at a predetermined distance from the outer periphery of the surface processed portion.   The method for producing a mirror-coated body according to claim 1, wherein the concave portion is formed from the outer periphery of the surface processed portion to a certain distance outward.   The method for manufacturing a mirror-coated body according to any one of claims 1 to 3, wherein the recess is filled with a filler.   A mirror-coated body manufactured by the method for manufacturing a mirror-coated body according to any one of claims 1 to 4.

Images