JP2009029447A - Packaging container and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container and its manufacturing method which are capable of forming a synthetic resin-made container with unevenness formed thereon in a short time by a simple method. <P>SOLUTION: The container is formed of a box body forming piece which is integrally punched from one blank sheet 16 made of a thermoplastic resin, and projecting parts 14 formed by pressing a heated stamp plate 18 thereon are formed on the box body forming piece. The stamp plate 18 has a shape with a plurality of lines symmetric in a crisscrossed manner. Each projecting part 14 includes a side peripheral surface 14a in which an outer side of a part in contact with the stamp plate 18 is recessed to a predetermined depth with respect to the blank sheet 16, and an end face 14b continuous to a fore end of the side peripheral surface 14a and substantially parallel to a pressing face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging container made of a synthetic resin having irregularities formed on its surface and a method for producing the same.

  2. Description of the Related Art Conventionally, some packaging containers that store products and display them at a storefront are made by assembling box-forming pieces that are integrally punched from a blank sheet made of paper or synthetic resin. Some of these packaging containers are formed by three-dimensionally lifting characters and patterns from the sheet surface so as to give a strong impression to consumers. When the blank sheet is made of paper, it is easily plastically deformed and can be easily provided with unevenness by embossing. On the other hand, in the case where the blank sheet is a synthetic resin, the box body is formed by being folded in a sheet shape. Some blister cases, such as blister cases, are vacuum molded using a concave or convex mold to form recesses along the shape of the contents, and the contents are packaged without rattling.

  In addition, Patent Document 1 discloses a continuous vacuum forming composite plate manufacturing apparatus in which a three-dimensional shape is connected with a predetermined interval. This vacuum forming apparatus produces a forming base of a metal plate having a large number of recesses or convex cubes lined with a plurality of recesses or convex cubes that form connection walls or communication grooves at a predetermined interval, and this is connected to an air suction mechanism by a cylinder or multiple surfaces A resin sheet that has been affixed to a cylindrical roll, rotated, and softened is vacuum-formed. Alternatively, a large number of molding bases are connected in a belt shape, an air suction device is provided at the lower part, and stretched between two cylindrical drums to be vacuum-formed.

Moreover, the molding method of the packaging container disclosed in Patent Document 2 is such that, in vacuum molding or pressure molding, by closing the fixed side molds at both ends and the corresponding molding side molds in advance, In addition, the resin sheet is fixed at a position corresponding to the outer peripheral portion of each packaging container in which only the outer peripheral portions on both ends have convex portions such as elliptical shapes. Furthermore, by shifting only the extrusion center axis of the preformed plugs at both ends to the opposite end sides and extruding, the variation in the dimensions and thicknesses of the opening flange, side wall, bottom, etc. of the packaging containers at both ends in particular. It has been solved.
Japanese Patent Application Laid-Open No. 2004-237736 JP-A-5-177698

  In the case of the above conventional technique, when forming unevenness on a synthetic resin sheet, a three-dimensional uneven mold for forming a softened sheet and a vacuum device for vacuuming between the uneven mold and the sheet are necessary and large. Equipment was necessary and costly. Furthermore, the processing speed was slow and time consuming because of the vacuum. In addition, in order to give unevenness to the packaging container, two steps of a printing process for printing characters and pictures on a blank sheet and an embossing process for giving unevenness are necessary, which takes time and effort.

  On the other hand, when a method similar to the embossing performed on the paper sheet is used for the synthetic resin sheet, there is a problem in that heat is transmitted to the periphery of the raised portion and deformation cannot be used. .

  The present invention has been made in view of the above-mentioned problems of the prior art, and provides a packaging container capable of forming a synthetic resin container having irregularities formed in a short time by a simple method and a method for manufacturing the same. For the purpose.

  The present invention comprises a box-forming piece integrally punched from a single blank sheet made of a thermoplastic resin, and the box-forming piece is provided with irregularities formed by pressing a heated stamp plate. It is a packaging container. The blank sheet is made of, for example, polypropylene.

  Further, the stamp plate has a plurality of linear shapes that are symmetrical in the vertical and horizontal directions, and the unevenness has a side peripheral surface in which an outer side of a portion in contact with the stamp plate is recessed to a certain depth with respect to the blank sheet. , Consisting of an end surface that is continuous with the tip of the side peripheral surface and that is spaced a predetermined distance from the pressing surface.

  Further, the stamp plate has a single line shape along a contour line of an arbitrary shape that is symmetrical in the vertical and horizontal directions, and the concave and convex portions are formed on the inside of the portion in contact with the stamp plate, the blank sheet being the stamp plate. It is a spherical convex part bulging from the pressed surface.

  Further, the present invention is directed to pressing a heated stamp plate having an arbitrary shape substantially symmetrical vertically and horizontally to a predetermined position of one blank sheet made of a thermoplastic resin, and applying the stamp to the blank sheet by the heat of the stamp plate. Manufacturing a packaging container in which a concave portion or a convex portion is formed inside a portion in contact with the plate, the blank sheet on which the concave and convex portions are formed is punched to provide a box forming piece, and the box forming piece is assembled as a container. Is the method.

  The stamp plate has a circular shape, a spiral shape, a star shape, a triangular shape, a continuous elliptical shape, or the like. When the stamp plate has a shape of a double line or a triple or more line along a contour line of an arbitrary shape, the inside of the portion in contact with the stamp plate becomes a recess recessed with respect to the pressing surface. When the stamp plate is in the shape of a single line along the contour line of an arbitrary shape, the inside of the portion in contact with the stamp plate becomes a spherical convex portion that protrudes with respect to the pressing surface.

  The packaging container of the present invention and the manufacturing method thereof can provide a strong impression to consumers by forming irregularities on a sheet made of a thermoplastic resin surely in a simple process and raising characters and patterns. In addition, as a container for storing the contents in the recess formed in the thermoplastic resin sheet, the product can be protected from vibration with a small number of parts, and the product can be suppressed and fixed to prevent rotation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. A packaging container 10 of this embodiment is made of a thermoplastic resin, and is made by assembling a blank sheet 16 to be described later. On the side surface 12 of the assembled box body, a convex portion 14 is provided as viewed from the outside. The convex portion 14 includes a cylindrical side peripheral surface 14a that rises from the side surface 12 to a predetermined height, and a circular end surface 14b that continues from the tip of the side peripheral surface 14a.

  Next, the manufacturing method of the packaging container 10 is demonstrated based on FIG. After a predetermined pattern is printed on the blank sheet 16 made of thermoplastic resin, it is set on the base 22 of the stamp apparatus as shown in FIG. The blank sheet 16 is, for example, polypropylene. The stamp plate 18 is a metal such as brass in which a double circular protrusion 20 protruding toward the blank sheet 16 is integrally formed. The protrusion 20 becomes thinner as it approaches the tip.

  Next, as shown in FIG. 2B, the stamp plate 18 heated to the softening temperature of the resin of the blank sheet 16 is planarly pressed against the pressing surface 16 a that is one side of the blank sheet 16. Then, the blank sheet 16 is slightly expanded and deformed by heat, and as shown in FIG. 2C, the blank sheet 16 is fixed to the opposite side surface 16b opposite to the pressing surface 16a on the outer side and inner side of the portion where the stamp plate 18 is in contact. A side peripheral surface 14a that is recessed to the depth, an end surface 14b that is continuous with the tip of the side peripheral surface 14a and is substantially parallel to the opposite side surface 16b are formed, and the convex portion 14 is provided. In addition, when the front end surface of the protrusion 20 is inclined with respect to the blank sheet 16, the blank sheet 16 can be recessed more deeply.

  Thereafter, the blank sheet 16 on which the convex portions 14 are formed is punched into a predetermined shape to provide a box-shaped piece, and the box-shaped piece is assembled into a predetermined shape to form the packaging container 10. By assembling with the pressing surface 16a on the inside, that is, with the opposite side surface 16b on the outside, the convex portion 14 protrudes to the outside of the packaging container 10. In addition, when projecting the convex part 14 inside the packaging container 10, ie, making it into a hollow, it assembles with the press surface 16a outside. In addition, after stamping the blank sheet 16 into a predetermined shape in advance to form a box-shaped piece, the stamp plate 18 may be pressed to form the convex portion 14.

  Next, the product is put inside the packaging container 10 formed as described above. At this time, when a part of the product is engaged with the convex portion 14, rattling is eliminated and the product is held at a predetermined position to prevent rotation.

  According to the packaging container 10 of this embodiment, in a simple process of heating and pressing the stamp plate 18 in a flat manner, three-dimensional unevenness is formed on the blank sheet 16 made of thermoplastic resin, and characters and designs are partially formed. It can lift up and give a strong impression to consumers. In addition, the following effects are obtained.

  According to the packaging container 10, it is possible to prevent rattling by inserting a part of the product into the formed unevenness, thereby protecting the product from vibrations, and pressing and fixing the product to prevent rotation. By forming irregularities to hold the product in the packaging container 10, a separate buffer member for holding the product is not required, and the number of parts can be reduced. It can be used as an alternative to blister packs for thin products. The blister pack requires two members, a vacuum-formed thermoplastic resin forming container and a paper mount. However, according to the packaging container 10, the forming container is not necessary and can be made into one member. Since a plurality of recesses can be easily formed at low cost, it is possible to make a sample easily and inexpensively, for example, by putting a sample such as lipstick directly into the recess.

  Further, in the step of forming irregularities on the blank sheet 16 made of thermoplastic resin, no special irregularity mold or vacuum device is required, so that the irregularities can be formed in a short time at a low cost. The step of pressing the stamp plate 18 can form irregularities in the foil pressing step subsequent to the printing step of printing on the blank sheet 16, and the production efficiency is good. The stamp plate 18 is formed by protruding protrusions 20 along an outline of an arbitrary shape at a certain height, and the shape is simple and can be made in a short time at a low cost. You can increase or decrease. The convex portion 14 can be processed by printing, foil stamping, etc., and there is no restriction on the design, and the design can be freely made.

  Next, a second embodiment of the present invention will be described with reference to FIG. Here, the same members as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the packaging container 21 of this embodiment, a convex portion 26 is provided on the side surface 24 of the box. The convex portion 26 has a spherical shape bulging from the side surface 24 in a circular shape.

  Next, the manufacturing method of the packaging container 21 is demonstrated based on FIG. After a predetermined pattern is printed on the blank sheet 16 made of thermoplastic resin, it is set in a stamp device as shown in FIG. The stamp plate 30 is formed with a single circular protrusion 32 protruding toward the blank sheet 16. The protrusion 32 becomes thinner as it approaches the tip.

  Next, as shown in FIG. 4B, the heated stamp plate 30 is planarly pressed against the pressing surface 16 a that is one side of the blank sheet 16. Then, the blank sheet 16 expands and deforms due to heat, and as shown in FIG. 4 (c), a spherical convexity projecting toward the convex side from the pressing surface 16a inside the portion where the stamp plate 30 contacts. A portion 26 is formed.

  The blank sheet 16 on which the convex portions 26 are formed is punched into a predetermined shape to provide a box-shaped piece, and the box-shaped piece is assembled into a predetermined shape to form the packaging container 21. By assembling with the pressing surface 16 a facing outside, the convex portion 26 projects outside the packaging container 21. In addition, when the convex part 26 protrudes inside the packaging container 21, that is, it is used as a dent, it is assembled with the pressing surface 16a on the outside. Thereafter, the product is put inside the packaging container 21.

  According to the packaging container 21 of this embodiment, it has the same effect as the said embodiment. Since the convex portion 26 is circular and spherical, a simple and cute impression can be given. It is possible to design freely by arranging a plurality or arranging different sizes.

  Next, a third embodiment of the present invention will be described with reference to FIGS. The shape of the convex part provided in the blank sheet 16 can be freely changed. In FIG. 5, a spiral convex portion 34 having a high center is formed on the blank sheet 16. The convex portion 34 is formed of a spiral stamp plate and is provided so as to protrude from the opposite side surface 16 b of the blank sheet 16. In FIG. 6, a star-shaped convex portion 36 is formed on the blank sheet 16. The convex portion 36 is formed of a star-shaped triple-line stamp plate, and is provided so as to protrude from the opposite side surface 16b of the blank sheet 16 as in FIG. FIG. 7 shows that a substantially triangular shape having a slightly bulging side on the outside is provided in four similar shapes that are gradually reduced in size by matching the centers, and is slightly shifted by a certain angle with respect to the central axis. A convex portion 38 having a different shape is provided. The convex portion 38 is formed of a stamp plate in which four similar-shaped triangles are provided with a slight offset by a certain angle. In FIG. 8, a convex portion 40 having a shape in which a mountain having a large diameter and a mountain having a small diameter are connected in the vicinity of the middle is provided. The convex portion 40 is formed of a stamp plate having a quadruple line such as a contour line in which two peaks are connected near the middle.

  In addition, the packaging container of this invention is not limited to each said embodiment, If the shape of an unevenness | corrugation can be freely changed if it is arbitrary shapes substantially symmetrical vertically and horizontally, the aspect ratio will differ greatly. Although a thing causes distortion in a blank sheet, when there is a slight difference, it can be formed depending on the shape. Further, the box-forming piece includes not only a box-shaped piece but also a piece provided with a concave portion such as a receiving portion by a conventional blister pack. In addition, the number of irregularities and the formation position can be freely set, and the manufacturing process and the like can be changed as appropriate. The blank sheet material may be any material that has thermoplasticity and is easy to process.

It is a perspective view of the packaging container of 1st embodiment of this invention. It is the schematic which shows the manufacturing process of the packaging container of this embodiment. It is a perspective view of the packaging container of 2nd embodiment of this invention. It is the schematic which shows the manufacturing process of the packaging container of 2nd embodiment. It is a perspective view of the packaging container of 3rd embodiment of this invention. It is a perspective view of the packaging container which shows the modification of 3rd embodiment. It is a perspective view of the packaging container which shows the modification of 3rd embodiment. It is a perspective view of the packaging container which shows the modification of 3rd embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Packaging container 12 Side surface 14 Convex part 14a Side surface 14b End surface 16 Blank sheet 18 Stamp plate 20 Protrusion

Claims (4)

  It consists of a box-forming piece integrally punched from one blank sheet made of thermoplastic resin, and the box-forming piece is provided with irregularities formed by pressing a heated stamp plate Characteristic packaging container.   The stamp plate has a plurality of linear shapes symmetrical in length and breadth, and the unevenness has a side peripheral surface in which an outside of a portion in contact with the stamp plate is recessed to a predetermined depth with respect to the blank sheet, and The packaging container according to claim 1, comprising an end surface that is continuous with a front end of a side peripheral surface and is spaced a predetermined distance from the pressing surface.   The stamp plate has a single-line shape along an outline of an arbitrary shape that is symmetrical in the vertical and horizontal directions, and the concave and convex portions press the stamp plate of the blank sheet inside the portion in contact with the stamp plate. The packaging container according to claim 1, wherein the packaging container is a spherical convex portion protruding from the surface. Press a heated stamp plate of any shape symmetrical in length and breadth to a predetermined position of one blank sheet made of thermoplastic resin, and heat the stamp plate to the blank sheet and A method for producing a packaging container, comprising forming concaves and convexes on the inner side, punching out the blank sheet on which the concaves and convexes are formed, providing box-forming pieces, and assembling the box-forming pieces as containers. .

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