JPH0366228B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container lid with a non-slip liner, and more particularly, the present invention relates to a container lid with a non-slip liner that can be easily opened by grasping even when the surface of the container lid is wet with water. Regarding container lids. The present invention also relates to a container lid in which a liner and a non-slip protrusion are integrally formed.

Soft drinks, beer, etc. are usually drunk after the contents of the container have been cooled. As a result, water vapor in the atmosphere condenses on the surface of the cap, which is a good conductor of heat, and this water causes your hand to slip and make it difficult to open the cap.

The conventional technology for preventing caps from slipping is
A knurl is formed in the circumferential skirt portion of the cap, and proposals have been made regarding the knurl shape, such as W knurl and iris knurl. However, although the anti-slip properties of these knurls are effective when the surface is dry,
There is a problem in that a sufficient anti-slip effect cannot be obtained when the surface is wet with water.

The present inventors provided a hole in the container lid, and
It has been found that by providing an anti-slip protrusion projecting outward through this hole integrally with the liner, an extremely reliable anti-slip effect can be obtained even when the cap surface is wet with water.

That is, according to the present invention, the container lid shell is made of metal and includes a top plate and a skirt, and a resin liner material is applied to the inner surface of the top plate of the shell, and the top plate of the shell skirt A plurality of holes are circumferentially arranged at intervals in a portion adjacent to the container opening, and the liner material has a plurality of holes disposed in a circumferential manner at intervals,
There is provided a container lid with an anti-slip liner, characterized in that it has an anti-slip protrusion that protrudes outward from the outer periphery of the skirt portion through at least a portion of the hole.

According to the present invention, the container lid shell body includes a top plate portion and a skirt portion, and a plurality of holes are circumferentially arranged at intervals in a portion of the skirt adjacent to the top plate portion, and the molten resin is disposed within the container lid shell body. The molten resin mass is pressed with a press die inside the container lid shell to form the resin into a liner shape, and is pressed outward from the outer periphery of the skirt portion through at least a portion of the hole to slide. Provided is a method for manufacturing a container lid with a non-slip liner, which is characterized by forming a non-slip protrusion.

The present invention will be described in detail below based on specific examples shown in the accompanying drawings.

In FIG. 1 showing the shell of the container lid of the present invention and FIG. 2 showing the container lid with a liner, this container lid has the following features:
The device as a whole consists of a metal shell (1) and a resin liner (2) placed inside the metal shell. The shell 1 consists of a top plate part 3 and a substantially cylindrical skirt part 4, and a plurality of holes 5 are formed at intervals in a portion of the skirt part 4 near the top plate part.
are arranged in a circumferential manner.

This skirt portion 4 can be provided with an opening assisting mechanism, etc., which is known per se, as desired. In the cap of the specific example shown in FIG. ) 7 is provided, and a knurled portion 8 consisting of a circumferential row of minute protrusions is provided adjacent to the pill-proof opening mechanism.

The resin liner 2 is provided on the inner surface of the top plate portion 3 and includes a thin central portion 9 and a thick peripheral sealing portion 10 to engage with a container opening (not shown). . The liner constituent resin extends further outward than the thick peripheral portion 10 and projects outward beyond the outer peripheral surface of the skirt portion 4 through the hole 5 of the shell body 1.
A non-slip protrusion 11 is formed.

As is clear from the above description, the container lid of the present invention has a plurality of holes 5 circumferentially provided in the metal shell 1, and the resin is integrally formed with the liner 1 through these holes 5. A notable feature is that anti-slip protrusions 11 made of aluminum are formed.

That is, since the anti-slip mechanism in the container lid of the present invention is composed of a large number of resin protrusions arranged around the circumference, even when the outer surface of the cap is wet with water, it can be well engaged with the fingertips and prevented from slipping. Opening operation by turning can be easily performed without any trouble.

Further, since the anti-slip protrusion 11 is made of liner-constituting resin and is formed integrally with the liner 2, there is no risk that the protrusion 11 will separate from the shell skirt 4, and the formation of the protrusion 11 However, this can be done reliably and easily in conjunction with the manufacturing operations described below.

Furthermore, since the protrusion 11 is provided outward from the thick walled peripheral edge of the liner that engages with the container mouth, the formation of the protrusion 11 does not impair the sealing effect of the liner in any way. By employing the press molding method described below for molding the liner 2 and the protrusion 11, an excellent combination of easy-opening performance and sealing performance can be obtained.

Furthermore, in the container lid of the present invention, the resin protrusions are circumferentially arranged close to the outer periphery of the top plate, so it has a unique aesthetic appearance that has not been observed in conventional container lids. , it is possible to attract consumers' interest and increase the commercial value of the package.

Third part for explaining the manufacturing method of the container lid of the present invention
In the figure, first, a metal shell 1 is provided with a top plate portion 3 and a skirt portion 4, and a plurality of holes 5 are provided in a portion of the skirt portion 4 adjacent to the top plate portion.
is placed on the anvil 12 in an inverted state with the inner surface of the top plate portion 3 facing upward, and the molten resin mass 13 is positioned within the shell body 1. The anvil 12 may be heated to facilitate spreading of the molten resin.

A press molding device 14 for molding the molten resin mass into a liner shape is arranged on the shell 1. This press molding device 14 includes a series of press molds 15, 16, and 17 that are coaxially movable up and down.
A mold 15 for forming the thin central part of the liner is provided at the center, a mold 16 for forming the thick sealing part of the liner is provided at the outer periphery, and a mold 17 for regulating the edge of the liner is provided at the outer periphery. ing.

The mold 16 for molding the sealed portion is supported so as to be movable up and down relative to the mold 15 for molding the central portion, and the upper surface 18 of the mold 16 and the shoulder portion 19 of the mold 15 are connected to each other.
A spring 20 is provided between the central part molding die 15 and the working surface 21 of the central part molding die 15 in a free state. It is in. On the other hand, the liner edge regulating mold 17 is supported so as to be movable up and down with respect to the sealing mold 16 and the center molding mold 15. A spring 25 is also provided between the flange 23 and the shoulder portion 24 of the mold 15. Further, the stepped shoulder portion 26 provided at an intermediate position of the mold 17 engages with an outward flange 27 provided at the upper end of the sealing portion forming mold 16 in a free state.

In FIG. 4 for explaining the initial molding process, the entire press molding device 14 is lowered toward the shell 1. As the device 14 descends, the molten resin mass in the shell 1 is transferred to the disk 28 defined by the inner circumferential surface of the sealing part molding die 16 and the working surface 22 of the central part molding die 15. The shape is first preformed.

In FIG. 5 for explaining the final molding process, the center molding die 15 is pressed further than in the state shown in FIG. 4. Due to this pressure, the molten resin in the center part is molded into a predetermined thin shape, and the resin extruded from the center part by this applied pressure is
It flows into the gap between the shell body 1 and the working surface 21 of the mold for molding the sealing part, and lifts the mold 16 upward against the pressing force of the spring 20, thereby forming a thick wall for sealing with a predetermined size and shape. The molding of the parts is carried out.

At the same time, due to the pressure of the resin, the liner edge regulating mold 17 is also slightly lifted upward against the pressure of the spring 25, and the resin is pushed further outward than the sealing peripheral part 10 through this gap. , protrudes through a hole 5 provided in the shell skirt portion 4 to form a protrusion 11.

A refrigerant is introduced into the mold 15 to cool the pressed resin, and the molding of the liner and the formation of the protrusions are completed.

The shape and dimensions of the protrusion 11 can be adjusted by changing the shape and dimensions of the hole 5 provided in the shell skirt 4, or by adjusting the amount of resin filled into the shell, or by changing the pressing force of the mold 15. It can also be adjusted by adjusting . Furthermore, the sixth
As shown in the figure, the shape and dimensions of the resin protrusion 11 are as follows:
A mold 29 is provided to regulate the shape and dimensions of the molten resin extruded through the hole 5 onto the cooled mold surface 30.
It can also be controlled by contacting with.

The shape of the hole 5 provided in the shell skirt portion 4 may be any shape such as circular, oval, square, rectangular, triangular, or slit shape, and the diameter of the hole is 0.2.
It can be varied freely within the range of 5.0 mm to 5.0 mm, especially 0.5 to 3.0 mm. The number of holes is such that the cap can be easily opened by finger grip even when the surface is wet, and it is generally preferable to provide 1 to 5 holes per 1 cm of circumference. Note that the hole 5 may be a punched hole, but in order to prevent the trouble of the punched debris adhering to the shell etc., in the specific example of the present invention shown in the drawings, it is made as shown in FIG. 1. The hole 5 is formed by pushing and shearing the wall of the skirt portion in the radial direction. Thus, it is understood that the cross section of the hole 5 is the same as the cylindrical surface of the skirt portion 4 in the case of the punching method, but is rather a horizontal surface or a surface slightly inclined from the horizontal surface in the indentation shearing method. Should.

In the container lid with liner of the present invention, the resin protrusion 1
Since the hole 5 into which 1 is fitted is located outward from the thick peripheral portion 10 with which the container opening is engaged in a sealing relationship, the hole 5 is not necessarily sealed with the resin protrusion 11. It should be understood that there is no need to For example, since the molten density of the resin is smaller than the density when solidified, a gap may be formed between the hole 5 and the resin protrusion 11 due to shrinkage when the resin solidifies. . Also, among the plurality of holes 5 arranged in a circumferential manner, a resin is inserted into a certain hole to form a protrusion 11, and no resin is inserted into the other holes, so that the hole is left open. It is also possible to alternate this arrangement. The above configuration is
When used as a lid for a container filled with carbonated beverages, it is extremely effective in gradually lowering the internal pressure when the container is opened, thereby preventing bubbles from blowing out.

Of course, by applying a paint that exhibits thermal adhesiveness to molten resin in advance on the part of the skirt portion 4 where the holes 5 are provided, the resin extruded through the holes 5 can be tightly attached to the coating film around the holes 5. The hole 5 may be completely sealed.

In the present invention, as the resin forming the liner and the protrusions, olefin resins such as low density polyethylene, medium density polyethylene, ethylene-propylene copolymer; or polyvinyl chloride, vinyl chloride copolymer, etc.; styrene-butadiene copolymer, etc. Any liner-forming resin may be used, such as a polymer.

Examples of metal shells include tain-free metal shells.
Metal materials such as steel, tin, and aluminum are used to form the cap, and these are unpainted.
Alternatively, it is used after being coated with a protective paint such as an epoxy-phenol paint, an epoxy-amino paint, or a vinyl-epoxy paint. Any adhesive primer containing oxidized polyethylene, acid-modified olefin resin, etc. can be used to adhere the liner.

The resin protrusion is 0.1mm from the outer circumference of the skirt part 4.
A protrusion of 0.2 to 2 mm is usually sufficient for the purposes of the present invention.

In addition, the resin protrusions 11 may form independent protrusions, or they may be connected to each other on the outer periphery of the skirt portion 4 to form a circumferential ring 11' as shown in FIG. You may do so.

The container lid of the present invention can be manufactured by the above-mentioned pressure molding method, or can also be manufactured by a centrifugal molding method by injecting plastisol, a resin solution, or latex into a rotating shell.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing an example of the shell of the container lid of the invention, FIG. 2 is a partially sectional side view showing an example of the container lid with a liner of the invention, and FIG. 3 is a side view of the container lid according to the invention. An explanatory diagram showing the resin filling step of the method, FIG. 4 is an explanatory diagram showing the initial pressing step, FIG. 5 is an explanatory diagram showing the final pressing step, and FIG. 6 is an explanatory diagram showing the position control step of the extruded resin. , FIG. 7 is a partially sectional side view showing another example of the container lid with liner of the present invention. Reference number 1 is the shell, 2 is the liner, 4 is the skirt, 5 is the hole, and 11 is the protrusion.

Claims (1)

[Claims] 1. Consisting of a metal container lid shell having a top plate and a skirt, and a resin liner material applied to the inner surface of the top plate of the shell, the top plate of the shell skirt. A plurality of spaced holes are disposed circumferentially adjacent the portion of the skirt portion, and the liner material is threaded through at least a portion of the holes outwardly of the sealing engagement with the container mouth portion. A container lid with a non-slip liner characterized by having a non-slip protrusion protruding outward from the outer periphery. 2. A lump of molten resin is placed in a container lid shell body which includes a top plate portion and a skirt portion and in which a plurality of holes are circumferentially arranged at intervals in a portion of the skirt close to the top plate portion, The molten resin mass is pressed with a press mold inside the container lid shell to form the resin into a liner shape and extrude it outward from the outer periphery of the skirt portion through at least a portion of the hole to form a non-slip protrusion. A method for producing a container lid with a non-slip liner, characterized by: