JP4674713B2 - Labeled molded article and molding method thereof - Google Patents

Description

  The present invention relates to a synthetic resin injection molded product with an in-mold label and a molding method therefor, and a molded product with a label in which a label of an appropriate size is positioned on a desired surface portion of a molded product body and the molding thereof. It is about the method.

  When molding an injection-molded product with an in-mold label, a label having a heat seal layer is set in the mold in advance during injection molding, and the heat seal layer of the label is formed by the heat of the injected resin material. It is achieved by welding to the surface of the molded product body, and this molding also achieves strong sticking of the label to the molded product body simultaneously with the molding of the molded product body.

  In this in-mold label molding, the label set in advance in a predetermined position in the molding die is displaced in an improper position or its end is swollen by the injection flow pressure of the resin material to be injected. Inconveniences such as these are likely to occur.

In the container with a label, which is a conventional technique that eliminates this inconvenience, the body is provided with a label holding portion including the label, and a base end portion having a smaller diameter than the label holding portion, provided on the bottom side from the label holding portion. A technique is disclosed in which a gate is formed at the bottom and the end of the label is arranged corresponding to the stepped portion.
JP 2001-328138 A

  In the above-described prior art, the label is held in a fixed position by pressing the lower end portion of the label set in the label holding portion against the mold surface by the resin material flowing from the step portion to the label holding portion. Has been achieved.

  The label is inserted and assembled in the label holding portion with a gap between the lower end edge and the female mold, but covers the substantially entire area of the female mold surface of the label holding portion, and the upper end edge. In this state, the upper end edge is not pushed and displaced by the injection resin material due to the abutment of the upper edge against the mold surface.

  However, in the above-described prior art, it is necessary that the edge of the in-mold label abuts against the mold surface or does not face the flow of the injection resin material so that the in-mold label is not washed away by the injection resin material. For this reason, the in-mold label needs to be large enough to cover almost the entire outer surface of the label holding part. If the in-mold label is to be decorated with a logo or product information, the logo or product information In spite of the small area occupied by the label, the label area requires the above-mentioned area, and there is a problem that the label cost is unnecessarily high.

  In addition, the injection resin material does not cause the inconvenience that the edge of the label is rolled up, so the label must be arranged in the cavity so that the end surface does not face the flow of the injection resin material. For this reason, there is a problem that the location of the label within the cavity is greatly limited.

  Therefore, the present invention was devised to eliminate the above-mentioned dissatisfaction with the prior art, and the edge portion of the label positioned facing the flow of the injection resin material is rolled up by this injection resin material. The purpose is to prevent the label cost from becoming unnecessarily high, and to greatly reduce the restrictions on the location and state of the in-mold label, as well as the layout configuration. To do.

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is:
The bottom of the cylindrical body, is composed of a bottom plate having a gate trace at the center to continuously provided to a bottomed cylindrical, upper than the connection portion of the bottom plate, that Do is substantially constant flow direction of the injected resin material a part of the surface of the wall portion to be formed into a key Yabiti portion, to position the label is in-mold labels, around the label, the frame ridges projecting end is located at the same height level as the surface of the label Established
It is in.

In the first aspect of the present invention, the wall portion formed in the cavity portion in which the flow direction of the injected resin material of the synthetic resin injection molded product is substantially constant is the main part of the molded product. Therefore, the label positioned on the wall portion is in a state where the display is very easy to recognize.

  Also, the label need only be large enough to display only the decorations required for logos, product information, etc., without providing a functional part for holding the position. Absent.

  Furthermore, since the label is positioned surrounded by the frame ridge, the label display is displayed in a “forehead” shape, and the label is approximately the thickness of the label from the other wall portion. Since it is located so as to protrude by that amount, the display is displayed in a state where it is raised.

(Delete)

Still further , the body molded by the cavity part for molding the main part of the molded product, in which the flow direction of the injected resin material is substantially constant above the connection part with the bottom plate of the bottomed cylindrical body. Since the portion becomes a wall portion, the label can be positioned on the upper portion of the barrel that is easily noticeable.

(Delete)

(Delete)

The means of the invention described in claim 2 is:
The bottom of the barrel, is constructed with a bottom plate having a gate trace at the center to continuously provided to a bottomed cylindrical, upper than the connection portion of the bottom plate, that Do is substantially constant flow direction of the injected resin material some of the mold surface of the key Yabiti portion, which has a depth equal to the thickness of the label is in-mold label forms a slightly larger concave surface than the label, in the concave surface portion, a label, electrostatic suction force Or holding by vacuum suction force and injection molding,
It is in.

In the invention of claim 2, wherein the resin material flows along the mold surface of the cavity, the label, since the position in the concave mold surface submerged Recessed, injected resin material, There is no direct contact with the end face of the label located in the concave surface portion, and therefore the label in the concave surface portion receives almost no displacement force from the injection resin material, and there is no electrostatic adsorption force in the concave surface portion. It is positioned stably by the vacuum suction force.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the invention, the wall portion of the injection molded product made of synthetic resin is a portion that constitutes the main portion of the molded product. In this way, a high display effect and an effective decoration effect can be obtained.

  Moreover, since the label should just be the magnitude | size which displays only the decorations which a logo, merchandise information, etc. require, it is not necessary to enlarge a label unnecessarily, and can reduce label cost by that much.

  Furthermore, since the size and number of labels arranged in the wall portion range are not limited, they can be provided in the desired arrangement, shape, and size, thereby effectively exhibiting a decorative effect. Can be made.

  And since the label will be located surrounded by the frame ridges, the label display will be displayed in a “forehead” shape, and the label decoration will be displayed in a state of being raised from the wall surface. High display effect is exhibited.

In addition , since the entire area of the barrel, except for the connection with the bottom plate, of the bottomed cylindrical body is the wall portion, the label is positioned on the upper portion of the barrel that is easily noticeable with reduced label costs. Can be made.

(Delete)

In the invention described in claim 2 , since the injection resin material does not directly contact the end face of the label located in the concave surface portion, the label in the concave surface portion receives almost a displacement force from the injection resin material. Therefore, the label can be held firmly and immovably, thereby eliminating the need for a structure for holding the label firmly. The configuration of the molding die apparatus can be simplified.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of the present invention. FIG. 1 shows an overall front view and FIG. 2 shows an overall longitudinal side view.

  The molded product 1 of the first embodiment has a cylindrical taper that has a taper that is slightly enlarged upward and has a lower end as a leg cylinder 7 and a label 11 that is an in-mold label fixed to the surface. A narrow flange 5 is provided around the upper end of the cylinder 4, and the lower part of the barrel 4 is closed by a bottom plate 6 integrally provided with a gate mark at the center of the lower surface.

  The barrel 4 has a portion higher than the connection portion with the bottom plate 6 as a wall portion 2 to which the label 11 can be fixed, and the number of labels 11 to be fixed to the wall portion 2 formed by the barrel 4 is as follows. As in the illustrated embodiment, there may be one or a plurality of desired ones. Further, a frame protrusion 3 having a protruding end positioned at the same level as the surface of the label 11 is provided around the label 11 fixed to the wall portion 2 formed by the barrel 4, and the surface of the label 11 is It is located outside the surface of the wall portion 2.

  The label 11 fixed to the wall portion 2 of the barrel 4 is as large as necessary to decorate the required logo, product information, etc. As described above, the required logo It is also possible to display the product information separately on a plurality of labels 11 instead of displaying them together on one label 11.

  FIG. 3 is a view for explaining an example of a molding method of the molded product 1 in the first embodiment shown in FIG. 1, and is a female that forms a molding die 12 of an injection molding device in combination with a male die 13. The mold 14 is configured by forming a concave surface portion 15 in a depressed shape in accordance with the size and shape of the label 11 to be fixed in advance on the mold surface portion of the female mold 14 to which the label 11 is to be fixed.

  At the time of injection molding of the molded product 1, the label 11 is held in the concave surface portion 15 that is recessed and retracted with respect to the flow path formed by the cavity portion for molding the barrel 4. The resin material 10 does not directly contact the lower end surface of the label 11, and thus the label 11 is not improperly displaced by the injection flow pressure of the resin material 10, and maintains an appropriate posture and does not move. Located in.

  During the injection molding of the molded product 1, the resin material 10 injected from the gate 16 into the cavity is split up and down from the cavity portion for molding the bottom plate 6 to the cavity portion for molding the barrel 4.

  Since the wall portion 2 of the barrel 4 is a higher portion than the connection portion with the bottom plate 6, the resin material 10 divided into the cavity portion for molding the wall portion 2 is attracted to the label 11 held by suction. Will go from below.

  At the time of injection molding of the molded product 1, the label 11 is held in the concave surface portion 15 that is recessed and retracted with respect to the flow path formed by the cavity portion for molding the barrel 4. The resin material 10 does not directly hit the lower end surface of the label 11, and thus the label 11 does not move improperly due to the injection flow pressure of the resin material 10 and maintains an appropriate posture and does not move. Located in.

  FIG. 4 shows an example in which the concave surface portion 15 is formed in a rectangular concave shape in accordance with the rectangular label 11, the depth of which is equal to the thickness of the label 11, and the shape and size of the label 11 The size is slightly larger.

  Further, the label 11 is held in the concave surface portion 15 by providing a vacuum hole 17 by the insert 18 and sucking and holding the vacuum hole 17 by using the vacuum hole 17 or by using an electrostatic attraction force. If the vacuum hole 17 is provided and held by suction, a weak suction holding force may be used.

  In the description of the illustrated embodiment, the vacuum hole 17 is formed in a slit shape by the insert 18. However, the vacuum hole 17 may be formed by providing a large number of pores without using the insert 18.

  Further, when the label 11 is weak, the trace of the vacuum hole 17 may appear slightly on the surface of the label 11. It is preferable to decorate the surface of the label 11 in advance with a trace as a part of the pattern.

1 is an overall front view showing a first embodiment of the present invention. It is a vertical side view of 1st embodiment shown in FIG. It is a metal mold | die longitudinal cross-sectional view explaining the shaping | molding method of 1st embodiment shown in FIG. FIG. 2 is an external view of a mold surface portion in which a vacuum hole is formed in the explanatory view shown in FIG. 1.

DESCRIPTION OF SYMBOLS 1; Molded article 2; Wall part 3; Frame protrusion 4; Body cylinder 5; Barb piece 6; Bottom plate 7; Leg cylinder 8; Main body plate 9: Leg piece 10; Resin material 11; Label 12; Male mold 14; Female mold 15; Concave surface 16; Gate 17; Vacuum hole 18;

Claims (2)

A bottom plate (6) having a gate mark at the center is connected to the bottom of the barrel (4) to form a bottomed cylinder, and the injected resin is higher than the connection portion with the bottom plate (6). material on a part of the surface of the wall portion where the flow direction is formed into a substantially constant and such Ruki Yabiti portion (10) (2), to position the label (11) is in-mold labeling, the label (11) A molded article with a label in which a projecting end is provided with a frame ridge (3) positioned at the same height level as the surface of the label (11). A bottom plate (6) having a gate mark at the center is connected to the bottom of the barrel (4) to form a bottomed cylinder, and the injected resin is higher than the connection portion with the bottom plate (6). some of the mold surface of Ruki Yabiti partial flow direction, such that a substantially constant material (10), and has a thickness equal to the depth of the label which is in-mold label (11), than the label (11) A slightly large concave surface portion (15) is formed, and the label (11) is held in the concave surface portion (15) while being held by electrostatic adsorption force or vacuum suction force, and injection molded. Method.

Images