JPH0633100B2 - Lid for containers such as bottles and containers, and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lid for a container such as a bottle, a box, a carton, a can, and a container.

2. Description of the Related Art The inventor of the present invention previously invented and disclosed a container closing device. (Japanese Patent Application No. 58-15310) This device is formed substantially as shown in FIG. In the figure, a is a lid of a container made of synthetic resin, b is a mounting portion for the container,
c is a mouth wall, d is a fissure, e is a tear member, f is a tear portion, g is a metal foil such as aluminum, and h is an outer lid. Since the metal foil g can prevent the permeation of oxygen from the fissure d, the deterioration of the contents of the container can be prevented, and the fissure d and the metal foil g can be prevented.
Tearing is easy. Although not shown in the drawing, the metal foil g has a surface on which a synthetic resin layer is formed.

Problems to be Solved by the Invention However, the lid formed as described above still has a problem.

This is because when a consumer or the like purchases a product in a container such as a container provided with this lid and pulls the tearing member e to open the lid, the fissure d is torn, and as shown in FIG. The tearing portion f is torn off, but the tearing portion f and the metal foil g are separated from each other, and the metal foil g may not be cut and may be left as it is as shown in FIG. is there.

The present invention has been made to solve such a problem, and its purpose is to tear off the tearing portion f by the tearing member e to surely tear off the metal foil g attached to the lower surface thereof. It is possible to provide a lid for a container such as a bottle or a container and a method for producing the same.

Means for Solving Problems First, with reference to the drawings showing an embodiment of a lid for a container such as a bottle and a container, referring to FIGS. 1 and 3,
A mouth wall 2 formed on a synthetic resin main body 1 for blocking passage; an endless fissure 3 formed on the mouth wall 2; a tear portion 4 formed by the fissure 3; and inside the tear portion 4 A tearing member 5 provided on the mouth wall 2; a mounting portion 6 for a container provided on the main body 1; a rough surface or an uneven portion 9 formed on an inner surface of the mouth wall 2 other than the fissure groove 3; From the metal foil 8 having a synthetic resin layer 7 on the surface thereof, which is deformed following the rough surface or the uneven portion 9 to have a rough surface or uneven shape and which is fused to the mouth wall 2. A lid for a container such as a bottle or a container characterized by being made.

Next, a method of manufacturing a lid for a container such as a bottle or a container of the present invention will be described with reference to an embodiment. In FIGS. 4 to 7, a plurality of cavities including a first cavity 11,
A plurality of cores including the first core 14, a cavity plate 16, and an ejector plate 17 form a mold 18 for a lid of a container, and a rough surface or uneven surface 20 is formed in advance on a tip surface 19 of the first core 14. In addition, the mold 18
The metal foil 8 having the synthetic resin layer 7 on its surface is positioned on the tip surface 19 of the first cavity 11.
The molten synthetic resin is poured into the mold 18 from the gate 21 of
The metal foil 8 is made of the synthetic resin to form the rough surface or the uneven surface 2
The method for producing a lid for a container such as a bottle or a container is characterized by forming a lid for a container provided with a metal foil 8 having a rough surface portion or an uneven portion 9 by deforming following 0.

Operation First, the lid will be described. The lid 5 attached to the container is pinched, the force is applied to pull the tearing member 5, the tear groove 3 is torn off, and the tearing portion 4 is removed from the mouth wall 2. Then, the lower surface e of the tearing portion 4 and the upper surface of the metal foil 8 having the synthetic resin layer 7 are adhered by forming a rough surface portion or a concavo-convex portion 9 and a wider adhesion area than the conventional one. There is. Accordingly, when the tear groove 3 is torn, the metal foil 8 is torn along the tear groove 3 without being peeled from the tear portion 4, and is torn along with the tear portion 4.

Next, to describe the operation of the manufacturing method, in the mold 18 formed as shown in FIG. 4, on the surface of the first core 14,
With the metal foil 8 positioned, in that state, the molten synthetic resin is injected from the sprue 21 of the first cavity 11 as shown in FIG. 6, and a lid as shown in FIG. To do. In this case, since the rough surface or the uneven surface 20 is formed on the tip surface 19 of the first core 14, the front and back surfaces of the metal foil 8 together with the synthetic resin layer 7 become the rough surface portion or the uneven surface portion 9, and also this metal foil. Similarly, the portion of the mouth wall 2 of the lid attached to 8 also becomes the rough surface portion or the uneven portion 9. (See FIG. 6) For this reason, the adhesion area has a larger adhesion area than the conventional one,
As a result, in the one shown in FIG. 1, when tearing off the tearing portion 4, the metal foil 8 is not peeled off from the tearing portion 4 but is torn off as it is attached.

Embodiment The lid of the container shown in FIG. 1 is formed so as to be attached to a bottle as an example. When this lid is attached to a box, a carton or the like, the attachment portion 6 is formed in a flange shape and the attachment portion 6 is attached to the box, the carton or the like by adhesion, welding or the like.
Also when mounting on a can, an appropriate mounting portion 6 is formed and mounted. Incidentally, what is shown in FIG. 2 is an outer lid, which is screwed into the screw cylinder 22. Further, the screwing of this portion is an example, and this portion may be of the external engagement type.

The whole is made of synthetic resin, and 23 is a pouring cylinder.

Next, as shown in FIG. 4, the gate of the first core 14
The small portion corresponding to 21 is not formed on the rough surface or the uneven surface. This is because the synthetic resin layer 7 on the outer surface of the metal foil 8 near the sprue melts due to the molten synthetic resin that is ejected when formed in this way and is pushed out by pressure, and the metal surface of the metal foil is there. Because it will be exposed. Therefore, a small portion corresponding to the sprue 21, the tip surface 19 of the first core 14,
Only that portion is formed in the planar portion 23. (Figs. 5 and 6
(Effects of the Invention) The present invention is configured as described above, and the lid of the container such as a bottle or a container has the mouth wall 4 and the metal foil 8 having the synthetic resin layer 7 attached to the lid more than the conventional example. Also, since the adhesion area can be increased, it is possible to prevent the tearing section 4 and the metal foil 8 from peeling off when tearing the tearing section 4 using the tearing member 5. Also a bottle so formed,
Alternatively, a lid for a container such as a container can be very easily mass-produced.

Further, the metal foil 8 having a rough surface or unevenness on the inner surface of the mouth wall 2 is extremely bendable because the metal foil 8 is a foil when the lid is manufactured, and therefore the molten synthetic resin injected causes the metal core 8 of the first core 14 to be bent. Can be bent to follow the rough surface or uneven surface 20,
Moreover, it can be attached to the mouth wall 2 formed by solidification of the resin. Therefore, it is possible to form the lid extremely easily when manufacturing the lid, without requiring any special means.

[Brief description of drawings]

FIG. 1 and FIGS. 3 to 7 show an embodiment of the present invention. FIG. 1 is a sectional view of a lid of a container such as a bottle or a container.
FIG. 2 is a perspective view of an outer lid to cover the lid of the present invention. FIG. 3 is a sectional view of a metal foil used for the lid of the present invention, FIG. 4 shows a method of manufacturing the lid of the present invention, a sectional view of a mold and the portion of the lid, and FIG. FIG. 6 is a perspective view of a portion, FIG. 6 is a cross-sectional view of the mold and the lid of the container showing the next step of the step shown in FIG. 4, FIG. 7 is an enlarged view of the portion of FIG. 1, and FIG. FIG. 9 is a sectional view of a lid of a container such as a bottle or a container, and FIG. 9 is a view showing a usage state of the lid. 1 ...... Main body 2 ...... Mouth wall 3 ...... Crack groove 4 ...... Breaking part 5 ...... Breaking member 6 ...... Mounting part 7 ...... Synthetic resin layer 8 ...... Metal foil 9 ...... Rough surface part or uneven part 11 ... … 1st cavity 12 …… 2nd cavity 13 …… 3rd cavity 14 …… 1st core 15 …… 2nd core 16 …… cavity plate 17 …… Edge plate 18 …… die 19 …… tip surface 20 …… Rough or uneven surface 21 …… Gate

Claims (2)

[Claims] 1. A mouth wall 2 formed in a synthetic resin main body 1 for blocking passage of traffic; an endless fissure 3 formed in the mouth wall 2; a tear portion 4 formed by the fissure 3; The tearing member 5 provided on the mouth wall 2 in the portion 4; the attachment portion 6 for the container provided on the main body 1; the rough surface formed on the inner surface of the mouth wall 2 other than the tear groove 3 Or uneven portion 9; deformed following the rough surface or uneven portion 9 so that the surface becomes rough or uneven and is fused to the mouth wall 2, and has a synthetic resin layer 7 on the surface A bottle characterized by comprising a metal foil 8;
Lid for containers such as containers. 2. A plurality of cavities including the first cavity 11, a plurality of cores including the first core 14, a cavity plate 16, and an ejector plate 17 to form a mold 18 for the lid of the container, A rough surface or a concavo-convex surface 20 is formed in advance on the tip surface 19 of the 1 core 14, and the metal foil 8 having the synthetic resin layer 7 on the surface is positioned on the tip surface 19 of the mold 18, The molten synthetic resin is injected into the mold 18 from the spout 21 of the first cavity 11, and the synthetic resin deforms the metal foil 8 following the rough surface or the uneven surface 20 to form the rough surface portion or the uneven portion 9. A method of manufacturing a lid for a container such as a bottle or a container, which comprises forming a lid for the container provided with the metal foil 8 having the metal foil 8.