JP7100341B2 - Concavo-convex pattern additional decorative molded body and its manufacturing method - Google Patents

Description

The present invention relates to an uneven pattern additional decorative molded body having an uneven pattern on a peripheral surface provided in an annular shape and a method for manufacturing the same.

Compact containers and lipstick containers that contain cosmetics are required not only to have functionality, but also to have a good-looking design that reflects the product image. In order to meet such demands, for example, a metal thin film layer formed by aluminum vapor deposition to give a metallic luster or a transfer sheet printed with a complicated color pattern is attached to the lid of a compact container. By making full use of various technologies such as those made of aluminum, those with enhanced eye-catching effect on the appearance of the container have been proposed.

Recently, in order to impart a more complicated pattern, a part of the metal thin film layer or the transfer sheet is removed by laser irradiation, and the removed part is formed on the ground part or the ground part of the container. Characters and patterns are formed by exposing the colored layer (see, for example, Patent Document 1). Further, after forming an uneven pattern on the surface of the molded body in advance and forming a coating layer such as a metal thin film layer on the surface, the coating layer is partially removed by laser irradiation according to the unevenness of the uneven pattern. , It has been proposed to obtain a more impressive uneven pattern (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2007-216417 Japanese Unexamined Patent Publication No. 2006-334122

By the way, such surface decoration usually presupposes that the surface of the molded body is a flat surface or a very gentle fold curved surface. That is, if the object surface to be decorated has a large warp or an uneven surface, the transfer sheet cannot be neatly attached and beautiful decoration cannot be imparted.

Therefore, without using a transfer sheet, a clear uneven pattern is formed on the peripheral surface of a bottomed cylinder or a molded body of a heavenly cylindrical body, which is often used as a cosmetic container, or the surface is covered with a clear uneven pattern. It has been studied to stack layers and partially remove this coating layer by laser irradiation. For example, as shown in FIG. 9A, if a convex portion 51 having a radial cross section perpendicular to the central axis thereof can be obtained on the peripheral surface of the columnar molded body 50, the edge becomes an acute angle. It is possible to give an uneven pattern with a clear outline. Further, if a coating layer is provided on such an uneven pattern and a notch pattern is given by laser irradiation, a more interesting appearance can be obtained.

However, even if an attempt is made to inject a shape having a radial convex portion as shown in FIG. 9 (a) using, for example, a mold that opens in the vertical direction, both edges of the convex portion 51 [FIG. 9 (a). In the above, there is a problem that the portion indicated by the diagonal line M] becomes an undercut and cannot be removed as it is. For this reason, a complicated mold that combines slide molds is required, which is a great cost burden.

Further, in the uneven pattern with radial convex portions as shown in FIG. 9A, a coating layer 52 such as a metal thin film layer is formed on the surface thereof as shown by a chain line, and a part thereof is laser. When removing by irradiation to form a notch pattern, the lower portion of the undercut portion M cannot be removed by laser irradiation from a single direction, and the coating layer 52 cannot be removed, resulting in an uneven pattern. There is a problem that it is not possible to obtain a neatly overlapped notch pattern. Therefore, it is conceivable to repeatedly perform laser irradiation by changing the direction of irradiation, but it is not practical because the device for laser irradiation and the data to be input become complicated.

For this reason, conventionally, as shown in FIG. 9B, for example, a concavo-convex pattern in which a convex portion 51'of a gently sloping surface is combined is mainly imparted by injection molding, blow molding, or the like, and is clear. There is a need to establish a technique capable of providing a molded product having a strong impression of uneven patterns at low cost.

The present invention has been made in view of such circumstances, and in a molded body having an annular peripheral surface, a concave-convex pattern decorative molded body in which a clear and strong uneven pattern is formed along the peripheral surface and a decorative molded body thereof. The purpose is to provide a manufacturing method.

In order to achieve the above object, the present invention comprises a molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P, and the molded body is made of a resin molded body and at least. The peripheral surface of the molded body is provided with an uneven pattern composed of recesses formed continuously or intermittently along the circumferential direction of the peripheral surface and a portion in which the concave portion is not formed.
A metal thin film layer is formed on the peripheral surface of the molded body on which the uneven pattern is formed, and a part of the metal thin film layer is partially removed in an arrangement that overlaps with at least a part of the uneven pattern. A notch pattern is formed, and the concave portion of the uneven pattern in each predetermined region obtained by dividing the peripheral surface into n in the circumferential direction and the notch opening of the metal thin film layer in the notch pattern rotate each predetermined region with the central axis P. It is formed vertically downward in a state of being positioned directly upward with respect to the above, and is formed at an angle formed by the opening end surface of each recess and the bottom surface of the recess, and at an angle formed by the opening end surface and the bottom surface of each notch opening. The first gist is a decorative molded body with an uneven pattern that has regular uniformity .

Further, the present invention comprises a molded body having a rotation center axis P and having a peripheral surface extending in an annular shape about the rotation center axis P, and the molded body is made of a resin molded body, and at least the peripheral surface of the molded body. A concavo-convex pattern composed of recesses formed continuously or intermittently along the circumferential direction of the peripheral surface and a portion in which the recesses are not formed is provided, and the concavo-convex pattern of the above-mentioned molded body is provided. A metal thin film layer is formed on the peripheral surface on which the metal thin film layer is formed, and a notch pattern is formed by partially removing a part of the metal thin film layer in an arrangement that overlaps with at least a part of the uneven pattern. Ori,
The recesses of the uneven pattern and the notch openings of the metal thin film layer in the notch pattern are all formed toward the rotation center axis P, and the angle formed by the opening end surface of each recess and the bottom surface of the recess and each of the cuts. The second gist is an uneven pattern additional decorative molded body having regular uniformity in the angle formed by the opening end surface of the notch opening and the opening bottom surface .

The present invention comprises a step of preparing a molded body made of a resin molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P, and a laser on the peripheral surface of the molded body. A step of irradiating, partially removing the surface portion of the peripheral surface to form a concave portion, and obtaining an uneven pattern between the concave portion and a portion where the concave portion is not formed, and molding in which the uneven pattern is formed. A step of forming a metal thin film layer on the peripheral surface of the body and a step of obtaining a notch pattern by partially removing a part of the metal thin film layer in an arrangement overlapping with at least a part of the uneven pattern. In the step of obtaining the uneven pattern, the molded body is rotatably supported around the rotation center axis P, and the peripheral surface of the molded body is supported. , The operation of dividing into n in the circumferential direction and irradiating the divided predetermined region with a laser in the vertical direction to form a recess, and rotating the molded body to sequentially irradiate the divided predetermined region with a laser. In the step of obtaining the notch pattern, the operation of positioning the molded body at the receiving position is alternately performed, and the molded body is rotatably supported around the rotation center axis P, and the peripheral surface of the molded body is supported. The operation of dividing into n in the circumferential direction and irradiating the divided one predetermined region with a laser in the vertical direction to form a notch opening in a part of the metal thin film layer, and rotating the molded body. The third gist is a method for manufacturing an uneven pattern addition decorative molded body in which an operation of sequentially positioning a predetermined divided region at a position to be irradiated with a laser is alternately performed.

Further, the present invention comprises a step of preparing a molded body made of a resin molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P, and a laser on the peripheral surface of the molded body. A step of irradiating, partially removing the surface portion of the peripheral surface to form a concave portion, and obtaining an uneven pattern between the concave portion and a portion where the concave portion is not formed, and molding in which the uneven pattern is formed. A step of forming a metal thin film layer on the peripheral surface of the body and a step of obtaining a notch pattern by partially removing a part of the metal thin film layer in an arrangement overlapping with at least a part of the uneven pattern. In the process of obtaining the uneven pattern, the molded body is rotatably supported around the rotation center axis P, and the molded body is rotatably supported in the circumferential direction. In the step of forming a recess by irradiating a laser while continuously rotating and obtaining the notch pattern, the molded body is rotatably supported around its rotation center axis P, and the molded body is supported. The fourth gist is a method for producing a concave-convex pattern additional decorative molded body in which a notched opening is formed in a part of the metal thin film layer by irradiating the laser while continuously rotating the metal thin film layer.

Further, in the present invention, among those manufacturing methods , in particular, in the step of forming the notch pattern, when the portion to be removed of the metal thin film layer on the peripheral surface of the molded body is irradiated with laser, the molded body is subjected to laser irradiation. The fifth gist is a method for manufacturing an uneven pattern addition decorative molded body in which a notched pattern is formed by using the laser irradiation data at the time of forming the uneven pattern.

That is, the uneven pattern addition decorative molded body of the present invention is a molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P, and the molded body is made of a resin molded body. Along the circumferential direction of the peripheral surface of the molded body , concave portions are continuously or intermittently formed, thereby forming an uneven pattern. Then, whether the concave portions constituting the uneven pattern are formed in a specific direction with respect to the rotation center axis P in each predetermined region in which the peripheral surface on which the uneven pattern is formed is divided into n in the circumferential direction, or all the concave portions are formed. Is formed toward the rotation center axis P. In addition, in this invention, "n division" means virtual division.

According to this configuration, since the concave and convex concave portions are all formed in a specific direction with respect to the rotation center axis P of the molded body, the angle between the open end surface of the concave portion and the bottom surface of the concave portion is regular. There is unity. Therefore, the uneven pattern is clear in every part, very beautiful, and gives a strong impression. In addition, delicate patterns and characters consisting of recesses formed by fine dots and lines are clearly expressed, so that an excellent eye-catching effect that has never been seen before is exhibited.

Moreover , in the present invention , in particular, a metal thin film layer is formed on the peripheral surface of the molded body on which the uneven pattern is formed, and the metal thin film layer is arranged so as to overlap with at least a part of the uneven pattern. Since the part is partially removed to form a notch pattern and the notch pattern is given to at least a part of the part to which the uneven pattern is given, the uneven pattern and the notch pattern are combined. As a result, a complex three-dimensional effect is given, and the appearance is more impressive.

Further, the first manufacturing method of the present invention is a method for obtaining the uneven pattern additional decorative molded body, and in the step of forming the uneven pattern, the molded body is rotatably supported about the rotation center axis P thereof. In response, the peripheral surface of the molded body is divided into n in the circumferential direction, and laser irradiation is performed in the direction perpendicular to one of the divided predetermined regions to form a recess, and the molded body is rotated and divided. The operation of sequentially positioning the predetermined area to the position where the laser irradiation is received is alternately performed.

According to this manufacturing method, when laser irradiation processing is performed over the entire circumference of the molded body, the peripheral surface to be processed is divided into n in the circumferential direction and laser irradiation is performed for each divided region, so that one laser irradiation is performed. Because of this, the amount of processing data to be handled is small, and processing can be performed intermittently in a short time. Therefore, the timing of moving the processed product can be shortened, and the processing efficiency can be improved. However, since the laser irradiation becomes intermittent, care must be taken not to shift the uneven pattern at the start point and the end point of the laser irradiation.

Further, the second manufacturing method of the present invention is also a method for obtaining the uneven pattern decorative molded body, and in the step of obtaining the uneven pattern, the molded body is rotatably supported about the rotation center axis P thereof. In response to this, laser irradiation is performed while continuously rotating the molded body in the circumferential direction to form a notch opening.

According to this manufacturing method, when the laser irradiation processing is performed over the entire circumference of the molded body, the laser irradiation is performed while continuously rotating the peripheral surface to be processed, so that the processing is performed as in the first manufacturing method. There is no need to worry about the deviation of the uneven pattern at the boundary where the laser is interrupted, and the finish is beautiful on any part of the peripheral surface. However, depending on the design of the uneven pattern, the amount of processing data handled for one laser irradiation becomes enormous and it takes time for one processing, so the design of the notch pattern and the required unit time per unit time. It is desirable to use the first manufacturing method and the second manufacturing method properly according to the amount of processing.

Moreover , in these manufacturing methods , in particular, the step of forming the metal thin film layer on the peripheral surface of the molded body on which the uneven pattern is formed, and a part of the metal thin film layer are at least a part of the uneven pattern. Since it is provided with a process of forming a notch pattern by partially removing it in an arrangement that overlaps with the above, it is easy to obtain a decorative molded body having a more impressive pattern in which the uneven pattern and the notch pattern overlap. Can be

Then , among those manufacturing methods , in particular, in the step of forming the notch pattern, the molded body on which the metal thin film layer is formed is rotatably supported around the rotation center axis P. While rotating the peripheral surface of the molded body on which the metal thin film layer is formed continuously or intermittently by a predetermined angle, laser irradiation is performed on the planned removal portion of the metal thin film layer on the peripheral surface of the molded body. At that time, when the laser irradiation data at the time of forming the uneven pattern on the molded body is used to form the notch pattern, it is possible to easily obtain the one in which the uneven pattern and the notch pattern overlap with high position accuracy. It is more suitable.

It is a perspective view which shows the uneven pattern addition decorative molded body which is one Embodiment of this invention. It is a developed view of the peripheral surface on the lid side of the said embodiment. (A) is an explanatory diagram of a notch pattern provided in a convex portion of the uneven pattern in the above embodiment, and (b) is an explanatory diagram of a method of forming the notched pattern. It is explanatory drawing of the notch pattern provided in the concave part of the concavo-convex pattern in the said embodiment. It is a perspective view which shows the molded body which only the concavo-convex pattern is given of the said embodiment. It is explanatory drawing of the apparatus used for forming the concavo-convex pattern of the said embodiment. (a) is a schematic explanatory view showing an example of the method for forming the uneven pattern, and (b) is a schematic explanatory view showing another example of the method for forming the uneven pattern. It is explanatory drawing of the other embodiment of this invention. Both (a) and (b) are explanatory views of problems in the conventional uneven pattern.

Next, a mode for carrying out the present invention will be described. However, the present invention is not limited to the following embodiments.

FIG. 1 shows an embodiment in which the present invention is applied to a lid of a mascara container. This mascara container includes a bottomed tubular main body 1 for accommodating mascara liquid and a celestial tubular lid 2 that is detachably fitted to the upper end of the main body 1. The outer peripheral surface of the portion 1 is slightly reduced in diameter toward the bottom. A mascara applicator extending downward is fitted and fixed to the inside of the lid portion 2, but the mascara applicator has no special feature, and its illustration and description will be omitted.

Both the main body 1 and the lid 2 of the mascara container are colorless and transparent undercoat layers 30 on the surface of the molded body 3 made of a resin molded body [polypropylene resin (PP resin) in this example] colored in red. A metal thin film layer 4 formed by vapor-depositing aluminum is formed via the above, and a metallic glossy color is imparted as a whole [see FIG. 3 (b)].

The lid portion 2 will be described in detail. First, on the side peripheral surface (hereinafter, simply referred to as “peripheral surface”) 2a of the lid portion 2, flowers and petals are shown on the lower side as shown in FIG. 2 in which this surface is expanded and shown in a plane. The pattern rises from the surroundings and is formed in a relief shape (first uneven pattern T). A first notch pattern R composed of diagonal slits is formed in the portion showing the flower. Further, on the upper side of the first notch pattern R, a band-shaped region recessed from the surface is formed continuously extending in the circumferential direction (second uneven pattern U). Then, a second notch pattern S composed of vertical striped slits is formed in this band-shaped region.

As shown in FIG. 3A, the first notch pattern R is partially formed as if the bulge of the uneven pattern T showing a flower is shaded. The notch pattern R is composed of diagonal slits, that is, each notch opening 5 is linear, and in each notch opening 5, the metal thin film layer 4 is removed, and the metal thin film layer 4 is removed from the notch opening 5. The colorless and transparent undercoat layer 30 is exposed, and the surface of the red-colored molded body 3 underneath is transparent and is seen as a red line.

Further, as shown in FIG. 4, the second notch pattern S is composed of linear notch openings 5 extending in just proportion in the recesses of the band-shaped uneven pattern U, and each notch opening is formed. In 5, the metal thin film layer 4 is removed, the transparent undercoat layer 30 underneath is exposed, and the surface of the molded body 3 colored in red underneath is transparent, as in the notch pattern R. , Seems as a red line.

The lid portion 2 can be obtained, for example, as follows. That is, first, a PP resin colored in red is used as the resin material, and as shown in FIG. 5, a relief-like uneven pattern T that three-dimensionally shows flowers and petals on the outer peripheral surface which is the peripheral surface 2a of the lid portion 2. And a bottomed tubular molded body 3 having an uneven pattern U formed of band-shaped recesses is prepared.

The molded body 3 is subjected to laser irradiation on a preformed body 3'(shown by a chain line in FIG. 5) for processing a bottomed cylindrical unevenness having an outer peripheral shape slightly larger than that of the molded body 3, and the outer peripheral surface thereof is subjected to laser irradiation. It can be obtained by partially volatilizing and removing to form uneven patterns T and U. The uneven processing of the outer peripheral surface of the preformed body 3'by laser irradiation is performed by inputting the data of the position to be processed in advance into the laser apparatus and intermittently scanning the laser beam based on the data.

It is preferable to perform the laser irradiation while rotating the preformed body 3'using, for example, an apparatus as shown in FIG. More specifically, this device includes a work support portion 11 that horizontally supports the preformed body 3'and a motor 12 that gives a rotational operation to the preformed body 3'supported by the work support portion 11. And have.

The work support portion 11 presses and holds the support shaft 11a that is fitted with the hollow portion of the preformed body 3'to support the opening side of the preformed body 3'and the center of the top surface of the preformed body 3'. It is composed of a holding shaft 11b, and the preformed body 3'is horizontally supported by both of them. A rotation stop portion that engages with each other is provided on the outer peripheral surface of the support shaft 11a and the inner peripheral surface of the opening of the preformed body 3'(not shown), and the rotation from the motor 12 supports the support. When transmitted to the shaft 11a, the preformed body 3'rotates integrally with the support shaft 11a.

Further, an output unit 13 of the laser device is arranged above the work support unit 11, and as shown by an arrow, faces the surface of the preformed body 3'supported by the work support unit 11. The laser beam is irradiated vertically.

Then, for example, as shown in FIG. 7A, the surface of the preformed body 3'is divided into three in the circumferential direction, and first, a laser irradiation is performed from directly above the region of 1/3 of the entire peripheral surface. Concavo-convex patterns T and U are partially formed (a state in which the metal thin film layer 4 is not formed in the portion shown as X1 in FIG. 2). Next, the preformed body 3'is rotated by 120 ° and laser irradiation is performed in the same manner, and the portion shown as X2 in FIG. 2 (state in which the metal thin film layer 4 is not formed) is processed. Further, the preformed body 3'is rotated by 120 ° and laser irradiation is performed in the same manner, and the portion shown as X3 in FIG. 2 (state in which the metal thin film layer 4 is not formed) is processed. Note that P is the central axis of rotation [the same applies to FIG. 7 (b)].

In this way, the entire peripheral surface of the preformed body 3'can be processed to obtain the molded body 3 in which the uneven patterns T and U are formed on the peripheral surface. As shown in FIG. 7A, the concave portions of the uneven patterns T and U formed on the peripheral surface are subjected to laser irradiation in a state where the portions of the peripheral surface divided into three are arranged directly above each. , Formed vertically downward in its arrangement.

When irradiating the surface of the preformed body 3'with a laser, the surface of the preformed body 3'is divided into n in the circumferential direction (three divisions in the above example) as described above to obtain the preformed body 3'. When the laser irradiation is performed n times intermittently by rotating by (360 / n) °, the amount of processing data handled for one laser irradiation is 1 / n when the entire circumference is processed at one time. It becomes an intermittent process in a short time. Therefore, the timing of transporting the processed product can be shortened, and the production efficiency can be improved. However, since the laser irradiation becomes intermittent, care must be taken not to shift the uneven pattern at the start point and the end point of the laser irradiation.

Then, depending on the material of the preformed body 3'(molded body 3), the diffusely reflected light generated during laser irradiation may hit the side surface of the concave portion of the concave-convex pattern and deform the concave portion shape into an unexpected shape. Therefore, in consideration of the type of laser, the material of the preformed body 3', and the like, care must be taken not to set the laser irradiation area too wide.

From such a viewpoint, when the laser irradiation is performed intermittently by dividing it into n times, it is usually preferable to set n to 3 or more, and more preferably 4 or more.

Further, when the surface of the preformed body 3'is irradiated with the laser, the laser irradiation is not performed intermittently by dividing the laser irradiation into n times as described above, but as shown in FIG. 7 (b), the preformed body is subjected to laser irradiation. It is also possible to irradiate the laser while rotating 3'to continuously form an uneven pattern on the entire peripheral surface. The concave portions of the uneven patterns T and U thus obtained are all formed toward the rotation center axis P as shown in the figure.

According to this method, unlike the case where laser irradiation is performed intermittently as described above, it is not necessary to worry about the deviation of the uneven pattern at the boundary portion where the processing is interrupted, and any part of the peripheral surface is beautiful. It will be finished. However, depending on the design of the uneven pattern T and U, the amount of processing data handled for one laser irradiation becomes enormous, and one processing takes time. Therefore, the design of the uneven pattern and the required unit time Depending on the amount of processing per hit, it is desirable to properly use whether to perform laser irradiation intermittently by dividing into n as described above, or to continuously process the entire circumference at one time.

Next, the undercoat layer 30 is formed on the top surface and the peripheral surface of the molded body 3 on which the uneven patterns T and U are formed by using a colorless and transparent resin composition for undercoating. Then, aluminum is vapor-deposited on the surface of the undercoat layer 30 to form the metal thin film layer 4. The vapor deposition can be performed by using an appropriate vapor deposition method such as a vacuum vapor deposition method, a sputtering method, or an ion plating method.

Next, the predetermined portion of the metal thin film layer 4 is irradiated with a laser, and as shown in FIG. 3B, the metal thin film layer 4 is partially volatilized and removed to form notch patterns R and S [ See FIGS. 2 and 3 (a)]. As for the removal processing of the metal thin film layer 4 by laser irradiation, as in the case of the uneven processing for obtaining the molded body 3, the data of the position to be processed is input to the laser device in advance, and the laser light is intermittently emitted based on the data. It is done by letting the laser scan. Therefore, if the processing data when the uneven patterns T and U are formed by laser irradiation is used as the processing data when forming the notch patterns R and S, the uneven patterns T and U can be used without complicated adjustment. On the other hand, the notch patterns R and S can be formed with an accurate arrangement, which is preferable.

Similar to the case of laser irradiation on the preformed body 3', the laser irradiation on the metal thin film layer 4 is also performed while rotating the molded body 3 on which the metal thin film layer 4 is formed by using an apparatus as shown in FIG. Is preferable. Also in this case, the method of intermittently irradiating the molded body 3 on which the metal thin film layer 4 is formed with laser irradiation in n times to form a notch pattern by 1 / n of the peripheral surface, and the metal thin film layer 4 A method of continuously forming the notch patterns R and S on the entire peripheral surface by irradiating the laser while rotating the formed molded body 3 can be appropriately selected.

When the above laser irradiation is performed intermittently to obtain the notch patterns R and S, the notch opening 5 has an n-divided peripheral circumference similar to the concave portions of the uneven patterns T and U shown in FIG. 7 (a). Since the surface portions are irradiated with the laser in a state where they are arranged directly above each other, they are formed vertically downward in the arrangement.

Further, when the above laser irradiation is continuously performed to obtain the notch patterns R and S, the notch openings 5 are all the same as the concave portions of the uneven patterns T and U shown in FIG. 7 (b), and the rotation center axis P is used. Formed towards.

The lid portion 2 thus obtained has a metallic luster as a whole due to the metal thin film layer 4, and a part of the peripheral surface 2a thereof is raised, and the pattern of flowers and petals is a relief-like uneven pattern T. Is formed. Further, a band-shaped uneven pattern U in which the concave portion extends in the circumferential direction is formed. Then, a notch pattern R composed of red diagonal slits is formed so as to partially overlap the uneven pattern T and emphasize the unevenness, and the unevenness is emphasized. Further, since the notch pattern S consisting of red vertical striped slits is formed in the concave portion in the arrangement completely overlapping with the uneven pattern U, the design has a unified feeling with movement in the circumferential direction. There is.

In particular, the concave portions of the uneven patterns T and U and the notch openings 5 of the notch patterns R and S are all formed in a specific direction with respect to the rotation center axis P (see FIG. 5) of the molded body 3. Therefore, the angle between the concave end faces of the concave and convex patterns T and U that overlap each other and the angle formed by the notched open end face of the metal thin film layer 4 with the exposed open surface are both regular and clear. Therefore, not only the unevenness of the uneven patterns T and U is clear, but also the notch patterns R and S are clearly expressed in every part even though they are composed of fine diagonal lines and vertical stripes. Demonstrates an excellent eye-catching effect overall.

When the unevenness of the unevenness patterns T and U is designed so that the unevenness cannot be clearly obtained due to the draft, the unevenness pattern as designed can be easily obtained without using a complicated mold. Therefore, it is particularly suitable. Moreover, as in the above example, when the metal thin film layer 4 is formed on the surface of the molded body 3 and the metal thin film layer 4 is removed by laser irradiation to form the notch patterns R and S, the uneven pattern T is formed. , U can be used for the processing data when forming the notch patterns R and S, so that the uneven patterns T and U can be accurately adjusted without complicated adjustment. Notch patterns R and S can be formed by the arrangement.

Further, in the above example, the peripheral surface 2a of the lid portion 2 is not completely covered with the smooth metal thin film layer 4 by the notch patterns R and S, but is in some places diagonal or vertical stripes. Since the roughness is given by the slit, the lid is used when the lid 2 is removed from the main body 1 or when the mascara liquid is applied to the eyelashes using the coating tool (not shown) extending from the lid 2. It has the advantage that the portion 2 does not slip and is easy to use.

In the above example, the material of the molded body 3 is not limited to the PP resin, and various moldable synthetic resins can be used. Among them, in addition to the above PP resin, polyethylene terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, acrylonitrile-butadiene-styrene (ABS) resin, acrylonitrile-styrene (AS) resin, polycarbonate (PC), polystyrene (PS). ) And the like are preferable in terms of moldability, durability and lightness. The color of the molded product 3 is not limited to red, and is selected according to the design of the entire mascara container, and may be transparent or opaque, and may be colored or colorless.

Further, in the above example, the metal thin film layer 4 is formed by vapor deposition of aluminum, but the type of metal is not limited to aluminum, and a thin film made of another metal material such as stainless steel may be used. Further, a hologram forming layer, a pearl-like imparting layer, a colorless or colored middle coat layer, a colorless or colored top coat layer, or the like may be further formed on the metal thin film layer 4. In these cases, more complex metallic luster tones can be obtained, expanding the range of designs. Alternatively, the undercoat layer 30 provided between the molded body 3 and the metal thin film layer 4 may be colored. In this case, in the notch patterns R and S, the surface of the colored undercoat layer 30 is exposed, so that the color of the undercoat layer 30 is not the color of the molded body 3, but the color of the undercoat layer 30 is the notch opening 5 [FIG. 3 (b). ), See Fig. 4]. Further, even if another colored layer or a layer having a partial pattern is formed between the molded body 4 and the undercoat layer 30, those layers can be seen through the transparent undercoat layer 30. good.

The laser used for forming the uneven pattern in the present invention is not particularly limited as long as it has a volatile removal effect on the resin, and various lasers can be used. For example, a CO ₂ laser, an excimer laser, a semiconductor laser and the like can be mentioned, and among them, the CO ₂ laser is suitable in terms of controllability and finish.

Further, as in the above example, the laser in which the metal thin film layer 4 is formed on the uneven patterns T and U and the metal thin film layer 4 is irradiated with the laser to form the notch patterns R and S is also used. As long as it has a volatile removal effect on the metal, it is not particularly limited, and various lasers can be used. For example, a YAG laser, a YVO ₄ laser, a semiconductor laser and the like are preferably used.

In the above example, the present invention is applied to the lid 2 of the mascara container having a substantially cylindrical shape as a whole, but the molded body targeted by the present invention is not necessarily a completely rotating body centered on the rotation center axis P. It does not have to be, and may be a polygonal prism such as a triangular prism or a quadrangular prism. Further, a cylinder or a prism having a gentle curve or taper in the axial direction may be used.

In addition to those having a long peripheral surface in the axial direction, such as the lid and main body of the mascara container and lipstick container, as shown in FIG. 8, for example, a compact container having a square shape in a plan view (of course, a circular shape in a plan view). In a compact container such as an elliptical shape or an elliptical shape), the present invention is also used when the uneven pattern T'is continuously or intermittently applied to the peripheral surface which is the side surface of the lid portion 20 or the main body portion 21. Can be applied. In particular, when the uneven shape of the uneven pattern T'does not become clear uneven due to the draft, or when the mold is complicated and difficult to manufacture, as described above, the rotation center axis P is used as the center. In FIG. 8, it is preferable to obtain an uneven pattern by performing laser irradiation while rotating as shown by an arrow.

Further, the present invention can be widely applied not only to decoration of cosmetic containers such as mascara containers, lipstick containers, and compact containers, but also to various resin molded products that require beautiful decoration of the peripheral surface. .. For example, it can be applied to mobile phones, stationery, home appliances, toys, various cases, and the like.

In the present invention, a beautiful uneven pattern is continuously or intermittently formed on the peripheral surface , and a notch pattern is formed by a metal thin film layer in an arrangement that overlaps with at least a part of the uneven pattern. It can be used for decorative molded bodies and their manufacturing methods.

2 Cover 2a Peripheral surface 3 Molded body T, U Concavo-convex pattern

Claims (5)

A molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P is provided, and the molded body is made of a resin molded body, and at least the peripheral surface of the molded body is the peripheral surface of the peripheral surface. An uneven pattern composed of recesses formed continuously or intermittently along the direction and portions without recesses is provided, and also
A metal thin film layer is formed on the peripheral surface of the molded body on which the uneven pattern is formed, and a part of the metal thin film layer is partially removed in an arrangement that overlaps with at least a part of the uneven pattern. A notch pattern is formed,
In a state where the concave portion of the uneven pattern in each predetermined region obtained by dividing the peripheral surface into n in the circumferential direction and the notch opening of the metal thin film layer in the notch pattern position each predetermined region directly above the rotation center axis P. An uneven pattern additional decorative molded body characterized by being formed vertically downward. A molded body having a rotation center axis P and a peripheral surface extending in an annular shape about the rotation center axis P is provided, and the molded body is made of a resin molded body, and at least the peripheral surface of the molded body is the peripheral surface of the peripheral surface. An uneven pattern composed of recesses formed continuously or intermittently along the direction and portions without recesses is provided, and also
A metal thin film layer is formed on the peripheral surface of the molded body on which the uneven pattern is formed, and a part of the metal thin film layer is partially removed in an arrangement that overlaps with at least a part of the uneven pattern. A notch pattern is formed,
A concave-convex pattern additional decorative molded body, characterized in that all the notch openings of the metal thin film layer in the concave-convex pattern and the notch pattern are formed toward the rotation center axis P. A step of preparing a molded body made of a resin molded body having a rotation center axis P and having a peripheral surface extending in an annular shape about the rotation center axis P, and a process of irradiating the peripheral surface of the molded body with laser to the circumference thereof. In the process of partially removing the surface portion of the surface to form a concave portion and obtaining an uneven pattern between the concave portion and the portion where the concave portion is not formed, and on the peripheral surface of the molded body in which the uneven pattern is formed, Addition of an uneven pattern including a step of forming a metal thin film layer and a step of obtaining a notch pattern by partially removing a part of the metal thin film layer in an arrangement overlapping with at least a part of the uneven pattern. It is a manufacturing method of decorative molded products.
In the step of obtaining the uneven pattern, the molded body is rotatably supported around the rotation center axis P, the peripheral surface of the molded body is divided into n in the circumferential direction, and one of the divided predetermined bodies is divided. An operation of irradiating a region with a laser in a direction perpendicular to the region to form a concave portion and an operation of rotating a molded body to sequentially position a predetermined region divided into a predetermined region at a position to be irradiated with the laser are alternately performed.
In the step of obtaining the notch pattern, the molded body is rotatably supported around the rotation center axis P, the peripheral surface of the molded body is divided into n in the circumferential direction, and one of the divided pieces is divided. The operation of irradiating a predetermined area with a laser in the vertical direction to form a notch opening in a part of the metal thin film layer and the predetermined area divided by rotating the molded body are sequentially placed at positions to be irradiated with the laser. A method for manufacturing a decorative molded body having an uneven pattern, which is characterized in that positioning operations are alternately performed. A step of preparing a molded body made of a resin molded body having a rotation center axis P and having a peripheral surface extending in an annular shape about the rotation center axis P, and a process of irradiating the peripheral surface of the molded body with laser to the circumference thereof. In the process of partially removing the surface portion of the surface to form a concave portion and obtaining an uneven pattern between the concave portion and the portion where the concave portion is not formed, and on the peripheral surface of the molded body in which the uneven pattern is formed, Addition of an uneven pattern including a step of forming a metal thin film layer and a step of obtaining a notch pattern by partially removing a part of the metal thin film layer in an arrangement overlapping with at least a part of the uneven pattern. It is a manufacturing method of decorative molded products.
In the step of obtaining the uneven pattern, the molded body is rotatably supported around the rotation center axis P, and laser irradiation is performed while continuously rotating the molded body in the circumferential direction to form recesses. And at the same time
In the step of obtaining the notch pattern, the molded body is rotatably supported around its rotation center axis P, and laser irradiation is performed while continuously rotating the molded body in the circumferential direction to perform laser irradiation on the metal. A method for manufacturing an unevenly patterned decorative molded body, characterized in that a notch opening is formed in a part of a thin film layer. In the step of forming the notch pattern, when laser irradiation is performed on the portion to be removed of the metal thin film layer on the peripheral surface of the molded body, the notch pattern is used by using the laser irradiation data at the time of forming the uneven pattern on the molded body. The method for producing a concavo-convex pattern decorative molded body according to claim 3 or 4, wherein the above-mentioned uneven pattern is formed.

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