JPH08183556A - Part-integrated type lid - Google Patents

Abstract

PURPOSE: To provide a part-integrated type lid which can be integrally formed with parts such as spoon. CONSTITUTION: For a lid 3 which is detachably provided on an opening part 2 of a container 1, a protruding part 5 is provided on the internal surface of a lid main body 4. At the same time, a part 6 is formed by bringing a synthetic resin of a low compatibility with the material of the lid main body 4 into contact with the protruding part 5 and the internal surface of the lid main body 4, add injecting said resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a lid with integrated parts,
In particular, the present invention relates to a container such as a food container to which a tool such as a spoon used when taking out contents is attached.

[0002]

BACKGROUND OF THE INVENTION Generally, yogurt, ice cream,
A container used for food such as yokan is molded of synthetic resin, and as shown in FIG. 15, the container body 10 and the lid body 1
1 and 1. Then, a spoon 12 or the like for taking out the contents may be attached to the back surface of the lid main body 11.

As a mounting method, the lid main body 11
There is a method in which a protrusion 13 is provided on the back surface of the and the separately molded spoon is locked here. In other containers, as shown in FIG. 17, the lid frame 14 and the spoon 15 are integrally molded with a synthetic resin, and the lid frame 14 and the spoon 15 are formed into a thin runner 1.
There is one that is connected at 6 to facilitate breaking of the spoon 15.

[0004]

However, in the former case described above, since it is necessary to form a spoon or the like as a separate member, the cost becomes high and, of course, the one formed separately from the container must be attached. For this reason, there is a possibility that the product may be forgotten to be attached or come off after being installed, and the product itself may be defective.

In the latter case, since a step of separately adhering a thin plate to be the upper surface of the lid to the molded lid frame is added, work efficiency is deteriorated. Furthermore, from the viewpoint of hygiene, it is desirable to manufacture food containers in the shortest possible process.

The present invention has been made in view of the above matters, and a lid with parts can be manufactured in a single step, the defective rate of the product can be reduced, and the manufacturing can be performed hygienically. It is a technical challenge to provide a lid.

[0007]

In order to solve the above technical problems, the present invention has the following structure in the lid 3 which is detachably provided in the opening 2 of the container 1.

That is, a synthetic resin having a low affinity with the material of the lid body 4 was contacted with the inner surface of the lid body 4 and injected to form the part 6. At this time, the convex portion 5 is provided on the inner surface of the lid body 4, and a synthetic resin having a low affinity with the material of the lid body 4 is contacted with the convex portion 5 and the inner surface of the lid body 4 and injected. The part 6 can be formed.

The container 1 may be made of synthetic resin, and the molding method and shape are not particularly limited. As the convex portion 5, a hook type or a dovetail type can be exemplified. Further, the part 6 is attached to the container body and is used when opening the container or taking out the contents. For example, a spatula, a straw, a comb, a brush, a cutter, a file, a fork, chopsticks, a toothpick. , Muddler, knife, etc.

Further, it is possible to form the lid main body 4 and the part 6 with synthetic resins having low compatibility with each other. For example, the lid body 4 is made of polypropylene (hereinafter, PP) (homopolymer), while the parts 6 are made of high-density polyethylene (hereinafter, HDPE) (homopolymer), impact-resistant polyethylene (hereinafter, HIPS), acrylonitrile-styrene resin. (Hereinafter, AS), acrylonitrile-butadiene-styrene (hereinafter, ABS), polyacetal (hereinafter,
POM). Of these, ABS and POM are particularly suitable.

Further, the lid body 4 and the part 6 may be formed of the same synthetic resin, and a substance that reduces the affinity between them may be present between them. Examples of this substance include silicone oil (polydimethylsiloxane), surfactants, metal soaps, lubricants and the like. It is also possible to use fatty acid-based substances.

Examples of the surfactant include nonion, anion and cation, examples of the metal soaps include stearic acid and metal salts, and examples of the lubricants include waxes, amides and esters. .

It is also possible to combine the above-mentioned respective materials and form the lid main body and the parts with synthetic resins having low compatibility with each other, and to allow a substance which lowers the affinity between the both to be present between them.

On the other hand, the convex portion 5 is formed, for example, in a shape that engages with the part 6 in a dovetail shape.

[0015]

The container 1 may be preformed or may be co-molded with the part 6. When the container 1 is preformed, the synthetic resin as the part 6 is injected into the lid main body 4 with the molded container 1 mounted in the mold. As a result, the part 6 is attached integrally with the lid body 4.

Since the part 6 is a synthetic resin having a low affinity with the material of the lid body 4, they are not fused to each other.
Is easily peeled off from the lid body 4.

[0017]

【Example】

<First Embodiment> A first embodiment of the present invention will be described with reference to FIGS.

In this embodiment, a lid 3 is detachably attached to an opening 2 of a cup-shaped container 1. Container 1
The contents 7 are accommodated in the container, and the opening 2 is covered with a seal 8 made of aluminum foil. The container 1 is formed by vacuum molding PP.

The lid 3 has the following structure. That is, the convex portion 5 is provided on the inner surface of the lid body 4. As shown in FIG. 4, the convex portion 5 has a claw portion 5b extending horizontally from the tip of a vertical portion 5a having a thick base and a thin tip. The vertical portions 5a are formed in parallel with each other, and the claw portions 5b are provided so as to project in a direction facing each other. The claw portions 5b may be arranged in a staggered manner, and the number thereof is not limited, as a matter of course.

The convex portion 5 is provided with a part 6 used as a spoon, for example. The part 6 is formed by injecting a synthetic resin having a low affinity with the material of the lid body 4 into contact with the convex portion 5 and the inner surface of the lid body 4 and injecting the resin. That is, as shown in FIG. 3, the lid main body 4 fixed in the mold 20.
Directly on.

As a result, the part 6 is brought into close contact with the back surface of the lid body 4 as shown in FIG. However, the parts 6 are made of synthetic resin having a low affinity with the material of the lid body 4, for example, HOMO: HDP with respect to PP of the lid body 4.
Since it is made of E, HIPS, AS, ABS and POM, it can be peeled off by applying a little force.

By inclining the vertical portion 5a as in this embodiment, an inclined surface is also formed on the side surface of the part 6 and the hooking of the finger is greatly improved. Also, the part 6 is AB
The peelability was the best when formed with S and POM. As the material of the part 6, in addition to the materials mentioned above, HOM
O: PP or COPOLYMER: PP can also be used, but they are somewhat inferior in terms of releasability.

The lid body 4 may be formed prior to the part 6 or may be formed simultaneously with the part 6. <Second Embodiment> A second embodiment will be described with reference to FIG. In this embodiment, the shape of the convex portion 5 is different. That is, the width of the vertical portion 5a is constant, and the claw portion 5b is horizontally provided from the tip thereof.
Is projected.

Further, in this embodiment, the lid body 4 and the part 6 are made of the same synthetic resin, and a substance that reduces the affinity between them is present between them. This material is silicone oil (polydimethylsiloxane) in this example. It is sufficient for these substances to be present only on the surface of the part 6, so in addition to addition to the synthetic resin forming the part, coating or spraying should be performed so as to form a film of a substance that reduces the affinity on the surface. Good.

As in the first embodiment, it is possible to form the lid body and the parts with synthetic resins having low compatibility with each other, and to allow a substance which lowers the affinity between them to be present between them. is there. <Third Embodiment> A third embodiment will be described with reference to FIG. In this embodiment, the convex portion 5 is composed of only the vertical portion. Compared with the first and second embodiments described above, there is an advantage that the part 6 can be easily removed. <Fourth Embodiment> A fourth embodiment will be described with reference to FIG. In this embodiment, the protrusion 5 is a protrusion such as a column or a prism, and the part 6 is formed so as to surround the protrusion. Therefore, the part 6 has a hole. This embodiment also has an advantage that the parts 6 can be easily removed. <Fifth Embodiment> A fifth embodiment will be described with reference to FIG. In this embodiment, the convex portion 5 is formed in a shape that engages with the part 6 in a dovetail groove shape. That is, the convex portion 5
The tip of the taper spreads out. In this embodiment, there is an advantage that the parts 6 are securely fixed. <Sixth Embodiment> A sixth embodiment will be described with reference to FIG. In this embodiment, the convex portion 5 has a drum shape.
That is, the inside of the convex portion 5 is thin, and the base portion and the tip end are spread in a tapered shape. In this embodiment, there is an advantage that the parts 6 are securely fixed. <Seventh Embodiment> A seventh embodiment will be described with reference to FIG. In this embodiment, a plurality of convex portions 5 shown in the fourth embodiment are provided. This embodiment has the advantage that the parts 6 are securely fixed. <Embodiment 8> Embodiment 8 will be described with reference to FIG. In this embodiment, the convex portions 5 are inclined in the facing directions. In this embodiment, there is an advantage that the parts 6 are securely fixed.

As described above, it is necessary that the part 6 can be easily peeled off by hand, but from the viewpoint that it is not preferable to remove the part 6 before peeling it off, the convex portion 5 makes the holding of the part 6 more reliable and the part 6 Any shape may be used as long as it has a shape that does not hinder the peeling of 6. (Test Example 1) The part 6 was HOMO: PP, C with respect to the lid body 4 made of PP (homopolymer) in the above Example 1.
OPOLYMER: PP, HOMO: HDPE, HIP
An experiment was conducted on the peelability of the part 6 when it was formed of S, AS, ABS and POM. (1) Test sample As shown in FIG. 13, the sample is A 120 mm, B 80 mm, C 10 mm, D 1.5 mm, E 2 m.
m and F are 3 mm, and G is 60 mm. This was molded using 50 tons of Sumitomo Heavy Industries Promat, and the temperature was 220 ° C., the pressure was 1100 kg / cm 2, the mold temperature was 40 to 50 ° C., the injection time was 1 second, and the cooling time was 4.5 seconds. (2) Test method A push-pull gauge was inserted through the hook hole provided on the knob 6a, and the push-pull gauge was pulled in the direction of arrow P to read the force at the time of peeling the parts.

The results are shown in Table 1.

[Table 1] Total peelability ◎ Easy peeling by hand ○ Peeling off with some force △ Peeling off by hand × Strong peeling strength (Test Example 2) Made of HiPS (styrene butadiene rubber 4
%) Of the lid body 4 to the part 6 of HOMO: PP, C
OPOLYMER: PP, HOMO: HDPE, HIP
An experiment was conducted on the peelability of the part 6 when it was formed of S, AS, ABS and POM. (1) Test sample The same as in Test Example 1 above. (2) Test method It carried out like the above-mentioned Test example 1.

The results are shown in Table 2.

[Table 2] Total peelability ◎ Easy to peel off by hand ○ Peeling off with some force △ Peeling off by hand × Strong adhesive force

[0029]

According to the present invention, since parts such as a spoon can be integrally molded with the lid body, the lid with the parts can be manufactured in a single step, and the productivity is improved.

Further, since there is no human process, there is no risk of leakage of the set, and the defective rate of the product can be reduced. In addition, it is hygienic because the parts do not touch the hand.

[Brief description of drawings]

FIG. 1 is a perspective view of a lid showing a first embodiment of the present invention.

FIG. 2 is a sectional view of the entire container showing Example 1 of the present invention.

FIG. 3 is a sectional view of a manufacturing process showing the embodiment of the present invention.

FIG. 4 is a cross-sectional view of the main parts showing the first embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part showing a third embodiment of the present invention.

FIG. 7 is a cross-sectional view of the essential parts showing Embodiment 4 of the present invention.

FIG. 8 is a cross-sectional view of a main part showing a fifth embodiment of the present invention.

FIG. 9 is a cross-sectional view of the essential parts showing Embodiment 6 of the present invention.

FIG. 10 is a cross-sectional view of the essential parts showing Embodiment 7 of the present invention.

FIG. 11 is a cross-sectional view of the essential parts showing Embodiment 8 of the present invention.

FIG. 12 is a cross-sectional view of the essential parts showing Embodiment 9 of the present invention.

FIG. 13 is a perspective view of a sample used for a part peelability experiment.

FIG. 14 is a front view of a sample used for a peelability test of parts.

FIG. 15 is a diagram showing a state in which parts are separated.

FIG. 16 is a cross-sectional view showing a conventional container with attached parts.

FIG. 17 is a plan view of a lid to which conventional parts are attached.

[Explanation of symbols]

 1 ・ ・ Container, 2 ・ ・ Opening part, 3 ・ ・ Lid, 4 ・ ・ Lid body, 5 ・ ・ Convex part, 6 ・ ・ Parts.

Claims (6)

[Claims] 1. A lid which is detachably provided in an opening of a container, wherein a synthetic resin having a low affinity with a material of the lid main body is contacted with an inner surface of the lid main body and injected to form a part. The featured integrated part lid. 2. The part-integrated lid according to claim 1, wherein a convex portion is provided on an inner surface of the lid body, and the convex portion is brought into contact with and ejected to form a part. 3. The lid body and the parts are made of a synthetic resin having a low compatibility, respectively.
Parts integrated lid described in. 4. The lid body and the parts are made of the same synthetic resin, respectively, and a substance that reduces the affinity between the two is present between the lid body and the parts. Parts integrated lid. 5. The lid body and the parts are formed of a synthetic resin having a low compatibility with each other, and a substance which lowers the affinity between the two is present between them. Parts integrated lid described in. 6. The part-integrated lid according to claim 2, wherein the convex portion is provided in a shape that engages with the part in a dovetail groove shape.