JP5288151B2 - Synthetic resin molded product surface decoration method and surface decorated synthetic resin molded product - Google Patents

Description

The present invention relates to a method of forming a concavo-convex pattern on the surface of a synthetic resin molded product by post-processing and decorating, and a synthetic resin molded product having a surface decorated .

As a method for forming a concavo-convex pattern on the surface of a molded product for the purpose of exhibiting functions such as decoration of a synthetic resin molded product and anti-slip, an injection molding metal has been conventionally used as described in Patent Document 1, for example. There is a method in which a concavo-convex pattern provided on a molding surface of a mold is transferred to a molded product surface simultaneously with injection molding of the molded product.
JP 2003-320555 A

The method of forming the concavo-convex pattern on the surface of the molded product by using the concavo-convex pattern provided on the molding surface of the injection mold described above can form the concavo-convex pattern simultaneously with molding, and the productivity and reproducibility of the concavo-convex pattern This is an excellent method.
However, on the other hand, for example, when changing from one pattern to various variations, it is necessary to remake the mold, which is difficult in terms of delivery time and cost, and there is a method that can easily change the pattern. is necessary.

Therefore, the present invention has an object to provide a method for easily forming a concavo-convex pattern on the surface of a synthetic resin molded article by post-processing, and in particular, molding the surface is decorated with various concavo-convex patterns. The purpose is to provide goods.

Among the present invention for solving the above technical problems, the method of the invention according to claim 1 comprises:
A method of decorating the surface of a molded product made of synthetic resin,
Using a plate formed with a concave and convex pattern arranged in parallel with a number of triangular fine grooves adjacent to the surface in a triangular shape on the surface,
The plate is sandwiched between hot stamp films for hot stamping , and the surface of the molded product made of synthetic resin is pressed so as to be pressed to a depth in the middle of the groove depth of the triangular narrow groove in a heated state,
The synthetic resin on the surface of this molded product is deformed along the uneven pattern of the plate,
Adjacent to the surface of the molded product is a triangular groove with a cross-sectional shape with protruding bead portions on both sides of a triangular recess, forming a parallel uneven pattern and overlaying the uneven pattern to decorate the hot stamp film Transferring the layer to the part from the bottom of the recess to the bead ,
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Among the present invention for solving the above technical problems, the method of the invention according to claim 2 is:
A method of decorating the surface of a molded product made of synthetic resin,
Using a plate formed with a concave and convex pattern in which a large number of rectangular narrow grooves having a rectangular cross-sectional shape on the surface are arranged in parallel at regular intervals,
The plate is sandwiched between hot stamp films for hot stamping and pressed to the middle of the groove depth of the rectangular narrow groove in a heated state to press the surface of the molded product made of synthetic resin,
Deform the synthetic resin on the surface of the molded product along the uneven pattern of the plate,
On the surface of the molded product, a large number of rectangular narrow grooves with cross-sectional shapes with protruding bead portions projecting on both sides of the rectangular concave portion, forming a parallel concave / convex pattern, and overlaying the concave / convex pattern, a decorative layer for hot stamp film Transferring to the part from the bottom of the recess to the bead ,
It is in.

  According to the method of claim 1 and claim 2, the plate heating temperature is appropriately controlled by the pressing force and together with the pressing force even if the plate has the concave and convex pattern by the same triangular narrow groove or rectangular thin groove. The concave / convex pattern can be transferred to the surface of the molded product shallowly or deeply by pushing it down to the middle of the groove depth, and bead portions protrude from both sides of the concave portion to form various concave / convex patterns. Can do.

In addition to the decorative function, the concave / convex pattern on the surface of the molded product can be partly formed in a transparent molded product, for example, by forming a large number of fine grooves to form a knurled shape and exhibit a function for preventing slippage. Various functions, such as roughening and adding haze, can be exhibited.
In particular, in the method of the present invention, by appropriately controlling the heating temperature and pressing force of the plate as described above, the uneven pattern can be formed shallowly, that is, delicately formed. Due to reflection or interference, an optical visual effect can be obtained which is not found in the method of forming a concavo-convex pattern simultaneously with molding by a conventional injection mold or the like.

Then, with the hot stamp film for hot stamping in between, press the surface of the molded product with a plate to form a concavo-convex pattern on the surface of the molded product, and overlay the decorative layer of the hot stamp film on the concavo-convex pattern. By transferring to the surface ,
The basic structure of a hot stamp film is a laminate of a base film made of polyethylene terephthalate resin or the like and a decorative layer such as a printed layer, a metal vapor deposition layer, or a metal foil layer. The hot stamp film has a predetermined pattern. Is heated and pressed against the surface of the molded product (commonly referred to as a hot stamp method), a part of the laminated decorative layer is thermally transferred to the molded surface ,
And print layer, and a metal deposition layer, while sandwiching the hot stamping film having a decorative layer of a metal foil layer or the like, by pressing the molded article surface with the plate, thereby forming an uneven pattern on the surface of the molded article The decorative layer can be transferred to the concave / convex pattern, and the decorativeness can be exhibited to a higher degree.

  According to the above method, the decorative layer is basically transferred to the portion of the concavo-convex pattern on the surface of the molded product where the pressing force of the plate is sufficiently applied. It becomes a combination of decoration layers and can exhibit a unique decoration effect. In particular, it is possible to exhibit an unprecedented decoration effect by combining a delicate uneven pattern with a pattern of a delicate decoration layer.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the surface of the molded product and the plate are pressed while the molded product is rotated about a predetermined axis, and the curve of the molded product is changed. Forming a concavo-convex pattern on the finished surface.

The unevenness forming method of the present invention can cope with various surface shapes such as a flat shape and a curved shape by appropriately selecting the shape of the plate (flat plate shape, curved shape, etc.) and the material,
According to the method of claim 2, even if the molded product has a curved surface shape, the molded product is rotated using an appropriate jig for rotating the molded product. However, by pressing the surface of the molded product and the plate, the uneven pattern can be smoothly formed on the curved surface.

  According to a fourth aspect of the present invention, there is provided the method according to the third aspect, wherein a plurality of fine circumferential grooves (7) made of triangular fine grooves or rectangular fine grooves are juxtaposed on the side peripheral wall of the transparent crested cylindrical cap. Forming a knurled shape.

  According to the method of claim 4, by pressing the surface of the molded product and the plate while rotating the cap around its central axis using an appropriate jig, a large number of the entire circumference of the side peripheral wall can be obtained. It is possible to smoothly form a knurled concave / convex pattern in which fine circumferential grooves are arranged in parallel.

By preparing a plate in which the groove width, cross-sectional shape, depth, and distance between adjacent grooves are variously prepared, a cap formed with knurled concavo-convex patterns of various variations can be provided.
Further, as described above, the groove depth can be controlled by the plate temperature and pressing force to form a delicate uneven pattern.

  In addition, by making the cap transparent, light is reflected according to the uneven pattern, and various shines can appear, and moreover, moire is caused by optical interference between the side walls. A pattern can also appear.

  The invention according to claim 5 relates to a synthetic resin molded product with a surface decoration, and the means of the invention according to claim 5 is a method in which a large number of triangular fine grooves or rectangular fine grooves are arranged in parallel on the surface of the molded product. And forming a concave / convex pattern with bead portions protruding on both sides of a triangular or rectangular concave portion, and a decorative layer of a hot stamp film for hot stamping over the concave / convex pattern from the bottom portion of the concave portion to the bead portion. Transcribed on the part of
It is in.

Means invention 請 Motomeko 6 wherein, in the invention of claim 5, wherein the surface of the side wall of the molded article having a cylindrical side wall, a large number of fine circumferential groove consisting of triangular narrow groove or rectangular narrow grooves A concavo-convex pattern with bead portions protruding on both sides of a triangular or rectangular concave portion is formed in parallel with a knurled shape, and the decorative layer of the hot stamp film for hot stamping is superimposed on the concave and convex pattern . Transferring to the part from the bottom to the bead ,
It is in.

  In the molded product having a cylindrical side peripheral wall such as a molded product cap according to the above-described configuration, various variations of the concave / convex pattern are formed on the surface of the side peripheral wall by the peripheral groove, and the entire region of the concave / convex pattern is formed. Alternatively, the decorative layer can be transferred to overlap the portion, and an unprecedented decorative effect can be exhibited.

  In addition, in a transparent molded product, light is reflected according to the uneven pattern of the circumferential groove and various shines can appear, and furthermore, moire patterns are created by optical interference between the side walls. Can also appear.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first and second aspects of the invention, the uneven pattern can be easily formed by post-processing on the surface of the molded product made of synthetic resin, and the uneven surface of various variations can be formed on the surface of the same molded product. Products decorated with can be provided, and customers can choose according to their preference.

  In addition, even for a plate having an uneven pattern with the same triangular narrow groove or rectangular thin groove, the heating temperature of the plate is appropriately controlled by the pressing force and together with the pressing force so as to be pushed to a depth in the middle of the groove depth. The concavo-convex pattern can be transferred to the surface of the molded product shallowly or deeply, and bead portions are formed to protrude on both sides of the concave portion, so that various concavo-convex patterns can be obtained.

  It is possible to form the concave / convex pattern shallowly, that is, delicately, and the concave / convex pattern is formed at the same time as molding with a conventional injection mold or the like due to light reflection or interference due to the delicate irregularities on the surface. Provides optical visual effects not found in the method.

Moreover, while forming an unevenness | corrugation on the molded article surface, a decoration layer can be transcribe | transferred on this uneven | corrugated pattern, and decorating property can be exhibited more highly. In particular, it is possible to exhibit an unprecedented decoration effect by combining a delicate uneven pattern with a pattern of a delicate decoration layer.

  In the invention of claim 3, even if the molded product has a curved surface shape, the molded product is rotated by using an appropriate jig for rotating the molded product. An uneven pattern can be smoothly formed on the curved surface by pressing the surface of the molded product and the plate while moving.

  In the invention of claim 4, by pressing the surface of the molded product and the plate while rotating the cap around its central axis using an appropriate jig, over the entire circumference of the side peripheral wall, A knurled uneven pattern in which a large number of fine circumferential grooves are juxtaposed can be formed smoothly.

  In addition, by making the cap transparent, light is reflected according to the uneven pattern, and various shines can appear, and further, moire is caused by optical interference between the side walls. A pattern can also appear.

In the invention of claim 5 or serial 6 mounting on the surface of the formed molded article, thereby forming an uneven pattern of the different variations by triangular narrow grooves or rectangular narrow grooves, decorative overlaid on the uneven pattern The layer can be transferred, and a molded product having an unprecedented decorative effect can be obtained.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings.
FIG. 1 explains a first embodiment of the decorating method according to the present invention, and is a schematic explanatory diagram showing the vicinity of the surface of the molded product 1 and the heated plate 11 in an enlarged and longitudinal manner.
FIG. 1 (a) shows a state immediately before pressing a plate 11 having an uneven pattern formed in parallel with a large number of thin triangular grooves 14a having a triangular cross-sectional shape on the surface thereof, on a synthetic resin molded product 1. FIG. 1B shows a state in which the surface of the molded product 1 is pressed with the plate 11, and FIG. 1C shows an uneven pattern formed on the surface of the molded product 1 after the plate 11 is removed.

When the surface of the molded product 1 is pressed with the heated plate 11, heat is transmitted from the contact portion, the synthetic resin is softened near the surface of the contact portion, and the tip portion of the plate 11 is fitted into the surface of the molded product 1, In the peripheral portion, the resin in the inserted region is deformed, and the bead portion 3 is formed so as to rise in the gap of the recess 2. (See Fig. 1 (b))
Here, in the example of FIG. 1B, the pressing force of the plate 11 is adjusted, and the plate 11 is pushed down to a depth of about 1/4 of the triangular narrow groove 14a and stopped there.

Then, when the plate 11 is removed, a concavo-convex pattern having a cross-sectional shape in which the bead portions 3 are formed on both sides of the concave portion 2 is formed on the surface of the molded product as shown in FIG. Thus, even if the same plate 11 is used, the transfer depth of the uneven pattern of the plate 11 onto the surface of the molded product 1 can be controlled by the temperature and pressing force of the plate 11.
In the case of the present embodiment, using the plate 11 in which the width W1 of the triangular narrow groove 14a is 1 mm and the groove depth d1 is 0.5 mm, the width W2 is about 0.2 mm and the groove depth d2 on the surface of the molded product 1. Could form a triangular thin groove 4a having a thickness of about 0.1 mm.

Next, FIG. 2 shows a second embodiment of the decorating method of the present invention. In the plate 11 heated by sandwiching a hot stamp film 21 in which a printing layer is laminated as a decorating layer 22 on a base film 21a. It is a schematic explanatory drawing which expands and longitudinally cuts the surface vicinity of the molded product 1 and the plate 11 as an example of forming irregularities by pressing one surface of the molded product.
Among these, FIG. 2A shows a state in which the hot stamp film 21 is sandwiched and immediately before the heated plate 11 in which a thin rectangular narrow groove 14b having a rectangular cross section is formed on the synthetic resin molded product 1 is pressed. FIG. 2B shows the uneven pattern formed on the surface of the molded product 1 after the plate 11 is removed.

  Then, the concave / convex pattern formed by the rectangular narrow grooves 14b is transferred to the surface of the molded product 1 with a depth of about 1/3 by this plate, and the concave portions of the rectangular narrow grooves 4b formed on the surface of the molded product 1 are also transferred. The decorative layer 22 of the hot stamp film 21 is transferred to the portion from the bottom part 2 to the bead part 3, and the printing layer overlaps a part of the concavo-convex pattern, so that an unprecedented decorative effect is exhibited.

  If the hot stamped film 21 in which a vapor-deposited layer having a metallic luster or a metal foil layer is used as the decorative layer 22 instead of the printing layer is used, the decorative layer 22 having the metallic luster overlaps with a part of the concavo-convex pattern, This also exhibits an unprecedented decorative effect.

Next, FIG. 3 shows a third embodiment of the decorating method of the present invention, and an embodiment of a synthetic resin molded product with surface decorating of the present invention produced by this method, and is a transparent synthetic resin. It is a schematic explanatory drawing about the method of forming the uneven | corrugated pattern which consists of many thin circumferential grooves 7 over the perimeter of the side peripheral wall 6 surface of the cap 5 made from a metal.
As shown in FIG. 3A or 3B, a cap-like cylindrical cap 5 is externally fitted and fixed to a rotation fixing jig 16, and the rotation fixing jig 16 allows the cap 5 to move around a center axis. While being rotated at a speed, the plate 11 is moved in parallel at the same speed as the peripheral speed of the cap 5 while being pressed against the side peripheral wall 6 with a predetermined pressing force.

  The plate 11 of this embodiment is formed by engraving a large number of triangular narrow grooves 14a similar to the plate 11 shown in FIG. 1 on the surface, and is schematically shown in FIGS. 3 (a) and 3 (b). Through the process, a large number of thin circumferential grooves 7 having the cross-sectional shape shown in FIG. 1C can be smoothly formed over the entire circumference of the side circumferential surface 6 in a knurled shape.

And since this cap 5 is a transparent molded product, by making the cross-sectional shape of the delicate circumferential groove 7 various variations, the optical decoration effect of various aspects can be achieved by reflection and interference of each light. It can be demonstrated. Moreover, a moire pattern appears by optical interference between the opposing side peripheral walls 6, and an interesting decoration effect can be exhibited.
In addition, although the example of using the flat plate 11 was shown in the method of the above-described third embodiment, a curved plate partially extending along the shape of the molded product is used depending on the shape of the uneven pattern. This makes it possible to transfer the uneven pattern more smoothly.

  As mentioned above, although embodiment concerning the uneven | corrugated formation method of this invention and its effect were demonstrated along the Example, this invention is not limited to the said Example.

  In addition, as shown in the second embodiment, it is possible to combine a concave / convex pattern and a decorative layer of various forms by printing with a hot stamp film or metal vapor deposition, etc. Can be expanded.

Or decorating method of the synthetic resin molded article surface of the present invention as described is readily form a concavo-convex pattern of the various aspects by post-processing, by combining the decorative method according Ho Ttosutanpu, especially moldings As a surface decoration method, it can exhibit an unprecedented decoration effect, and application development of various molded products as a surface decoration method is expected.

It is a schematic explanatory drawing which shows 1st Example of the decorating method of this invention. It is a schematic explanatory drawing which shows 2nd Example of the decorating method of this invention. (A) And (b) is a schematic explanatory drawing which shows 3rd Example of the decorating method of this invention, (a) is a schematic perspective view of the state which is pressing the side peripheral wall of a molded article with a plate, (b) FIG. Moreover, (c) is an example of a synthetic resin molded product with a surface decoration of the present invention, and is a perspective view of a cap formed with a concavo-convex pattern.

DESCRIPTION OF SYMBOLS 1; Molded article 2; Concave part 3; Bead part 4a; Triangular thin groove 4b; Rectangular thin groove 5; Cap 6; Side peripheral wall 7; Rotation fixing jig 21; Hot stamp film 21a; Base film 22;

Claims (6)

Using a plate (11) formed with a concavo-convex pattern arranged in parallel with a large number of triangular fine grooves (14a) having a triangular cross section on the surface,
The plate (11) is sandwiched between hot stamp films (21) for hot stamping , and is pressed to a depth in the middle of the groove depth of the triangular narrow groove (14a) while being heated. (1) Press the surface,
The synthetic resin on the surface of the molded product (1) is deformed along the uneven pattern,
On the surface of the molded product (1), a plurality of juxtaposed concave / convex patterns are formed adjacent to each other with triangular triangular grooves (4a) having a cross-sectional shape protruding bead portions (3) on both sides of a triangular concave portion (2). And a synthetic resin molded product , wherein the decorative layer (22) of the hot stamp film (21) is transferred to a portion extending from the bottom of the concave portion (2) to the bead portion (3), overlaid on the concave-convex pattern. Surface decoration method. Using a plate (11) formed with a concavo-convex pattern in which a large number of rectangular fine grooves (14b) having a rectangular cross-sectional shape on the surface are arranged in parallel at regular intervals,
The plate (11) is sandwiched between hot stamp films (21) for hot stamping , and is pressed to a depth in the middle of the groove depth of the rectangular narrow groove (14b) while being heated. (1) Press the surface,
The synthetic resin on the surface of the molded product (1) is deformed along the uneven pattern,
On the surface of the molded product (1), a plurality of rectangular fine grooves (4b) having a cross-sectional shape with bead portions (3) protruding on both sides of a rectangular recess (2) form a parallel uneven pattern , and the the decorative layer (22) of the recess (2) to be transferred to the portion ranging bead portion (3) from the bottom and wherein the synthetic resin molded article surface of the hot stamping film overlaid on uneven pattern (21) pressurized Decoration method. While rotating the molded product (1) around a predetermined axis, press the surface of the molded product (1) and the plate (11) to form an uneven pattern on the curved surface of the molded product (1). The method for decorating the surface of a synthetic resin molded product according to claim 1 or 2, wherein: Formed in a knurled shape by arranging a small circumferential groove (7) consisting of many triangular narrow grooves (4a) or rectangular narrow grooves (4b) on the side peripheral wall (6) of a transparent crested cylindrical cap (5). The method for decorating the surface of a synthetic resin molded product according to claim 3. A concave / convex pattern in which a large number of triangular fine grooves (4a) or rectangular fine grooves (4b) are arranged in parallel on the surface of the molded product, and bead portions (3) protrude from both sides of the triangular or rectangular concave portions (2). The decorative layer (22) of the hot stamp film (21) for hot stamping is superimposed on the concave / convex pattern and is transferred to the portion from the bottom of the concave portion (2) to the bead portion (3). Surface-decorated synthetic resin molded product characterized by that. On the surface of the side peripheral wall (6) of the molded product having a cylindrical side peripheral wall (6), fine peripheral grooves (7) composed of a large number of triangular fine grooves (4a) or rectangular fine grooves (4b) are arranged in parallel. In the knurled form, a concave / convex pattern is formed by protruding the bead portions (3) on both sides of the triangular or rectangular concave portion (2), and the hot stamp film (21) for hot stamping is overlaid on the concave / convex pattern. decorative layer (22) comprises recesses (2) bead portion (3) that are transferred to the portion ranging characterized claim 5 front surface decorative synthetic resin molded article as set forth in the bottom of.

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