JPH072429Y2 - Molded product for heat shrinkable lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a molded article forming a heat-shrinkable lid (hereinafter referred to as a shrink lid).

[Conventional technology]

In the shrink lid, as shown in FIG. 6, the skirt portion 2 of the lid 1 is longer than the skirt portion 4 of the container 3 (wider).
When the shrink lid 1 is heat-shrinked,
As shown in the drawing, the lower end of the skirt portion 2 of the lid 1 is adapted to wind the skirt portion 4 of the container 3 to fix the lid 1.

If the lid 1 is fixed in this way, it is necessary to cut it with scissors or the like when opening it, so it is usual to provide a notch at the lower edge of the skirt portion 2 in advance.

[Challenges for devising]

However, the lid 1 as described above is completed by forming a synthetic resin film or sheet by a vacuum forming method or a pressure forming method and then trimming a margin (excessive edge). Although the notch was formed with a blade in No. 2, the notch has a linear shape, so that it cannot be visually observed due to heat shrinkage, or the vicinity of the notch becomes thick and cannot be easily opened.

Further, in order to automatically form a notch with a blade, an automatic device for that purpose is required, which leads to an increase in cost.

Then, the subject of this invention is to provide the molded product for shrink lids which can provide the notch of suitable shape and size, without requiring a special automatic device.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention provides a shrink lid molded article having a skirt portion provided around the top wall and having a margin continuous to the peripheral edge of the skirt portion. That is, a structure with a small recess on the back surface of the part was adopted.

[Action]

At the corner where the skirt and the margin are continuous, there is a small recess that is recessed from the back side, so the end of the small recess on the skirt side is open. The end face thus formed becomes a notch.

〔Example〕

As shown in FIGS. 1 and 2, a molded product for shrink lid
Reference numeral 10 denotes a heat-shrinkable synthetic resin film or sheet molded, and a top wall 11, a groove 12 provided around the top wall 11, and a flat portion provided on an outer wall of the groove 12. A skirt portion 14 that hangs from the skirt 13 and a margin 15 that is continuous with the skirt portion 14, and a small recess 16 is provided at a corner portion between the skirt portion 14 and the margin 15. This small recess
Reference numeral 16 denotes a vacuum forming or pressure forming mold provided with protrusions or recesses in advance, and is formed at the same time as the top wall 11 and the like,
The number, location and shape are selected appropriately. Also, the groove
12 is provided for reinforcement, but can be omitted.

The top wall 11, the groove 12, the flat portion 13, and the skirt portion 14 are portions that will become lids after trimming the margin 15, but the shape may be formed so as to correspond to the shape of the container.

As shown in FIG. 3 and FIG. 4, the small recess 16 has recesses in the corners of the skirt portion 14 and the margin 15 when viewed from the rear surface thereof. Has an open end face, and this end face shape is almost a notch shape. Therefore, depending on the shape of the notch you choose, a small recess
16 shapes may be appropriately selected. In the case of FIG. 3, the notch has a substantially triangular shape, and in the case of FIG. 4, it has a substantially oval shape. Of course, other shapes may be used.

FIG. 5 shows one method of trimming the molded product 10. In the figure, 20 is a male blade and 21 is a female blade. As can be seen from the figure, when the male blade 20 descends, the margin 15 is cut, the small recess 16 is also cut off, and only the lid portion falls into the female blade 21.

〔effect〕

According to the present invention, as described above, by simply providing the small recesses in advance at the time of molding the molded product for the shrink lid, a special notch forming device is not required and the notches are simultaneously formed in the conventional trimming process. Since this is advantageous in terms of cost, the shape of the notch can be easily tearable by properly designing the shape of the initial small recess.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a molded article of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 and FIG. 4 are perspective views showing small recesses, and FIG. 5 is trimming. Sectional diagrams showing the relationship between the cutting edge and the molded product, and FIGS. 6 and 7 are sectional diagrammatic views showing a state in which a conventional shrink lid is covered on a container. 10 …… Shrink lid molding, 11 …… Top wall, 12 …… Groove,
13 …… Flat part, 14 …… Skirt part, 15 …… Margin, 16
…… Small recess, 20 …… Male blade, 21 …… Female blade.

Claims (1)

[Scope of utility model registration request] 1. A heat-shrinkable lid molding having a skirt portion around the top wall and a margin around the skirt portion, wherein a small recess is provided on the back surface of the corner portion between the skirt portion and the margin. Molded product characterized by