KR20170086782A - Non-packing closed vessel cap and mold and method for its manufacturing - Google Patents

Abstract

The present invention provides a lid for a non-packing sealing body which can seal a container without using rubber or silicone packing, a mold apparatus for manufacturing the same, and a method of manufacturing the same. A container lid for non-packing sealing according to a preferred embodiment of the present invention includes: a lid outer rim having a certain thickness and extending along an outer contour of the container side opening; A lid upper surface portion connected to the upper end of the outer rim in a vertical direction with a predetermined width; A lid recess bottom part connected to the lid upper part through an inclined part and recessed at a relatively low height; A valve mounting portion formed at the bottom of the cap recess and having a valve coupling hole and a sealing exhaust hole; A tight seal part bent downward outwardly from a lower surface of the valve mounting part; A sealing groove having a close gap between the outer edge of the lid and the close sealing portion and allowing insertion of the opening of the container; And a lid removing grip portion formed at one position of the outer rim of the lid.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cap for sealing a non-packing closed vessel, a mold apparatus for manufacturing the same,

The present invention relates to a lid for a hermetic container used in a container for storing food or the like, and more particularly, to a lid for a hermetic container which can seal a container without using any rubber or silicone packing and a mold device And a manufacturing method thereof.

Examples of food containers are sauces, side dishes, and the like which are kept sealed. This has the main purpose of preventing moisture, liquids and odors from being blocked by sealing to prevent them from coming out well. If the sealing power is weak, the food easily smells and the odor is generated due to the smell coming out. Therefore, a sealed container or a vacuum sealed container is generally used by providing a separate packing as a sealing means to the lid in order to have a sealing force. At this time, the packing is made of rubber or silicone and is used by being inserted into the groove groove formed on the inner surface of the lid. In the case of using the packing in the sealed lid as described above, there is a disadvantage that the productivity is decreased and the economical efficiency is poor because the process of performing double injection and the process of assembling the packing are added. In addition, food waste stored in the container sticks to the packing on the lid side, which often causes difficulty in hygiene management such as frequent washing. Therefore, in order to reduce the manufacturing process of the sealed lid and to be economical, a method of not applying the packing should be sought.

As a background of the present invention, Korean Patent Registration No. 10-0780813 discloses a lock-nail type vacuum sealed container. The lid includes a container body and a lid which is mounted to the container body so as to be hermetically sealed via a packing, and a valve which is operable to open or close the lid so as to communicate with the inside and outside of the container, Wherein the lid has a flange ring tangent along a rim of the container body, and a flexible wrinkle formed of silicon inside the flange ring is formed, and the flexible wrinkle is formed on the central portion of the flexible wrinkle A central panel is mounted, and the valve is formed in the central panel. Therefore, the binding of the container lid is assured and the inside of the container is evacuated, so that the food can be stored for a long period of time.

However, the background art of the former requires a packing groove in the lid and a packing in the packing groove, so that a problem of double injection and hygienic management of the packing remain.

As another technology to be a background of the present invention, Korean Patent Registration No. 10-0774248 discloses a vacuum valve type airtight container. A first valve mounted on the first valve mounting hole, a second valve mounted on the first valve mounting hole, and a second valve mounted on the first valve mounting hole, A second valve mounted on the mounting hole, and at least one air distribution slit groove.

Thus, the air inside the container is discharged to the outside, and the inside of the container is evacuated, so that the food can be stored for a long period of time without corruption, and the connecting portion of the vacuum pump can be compacted to be easy to store and there is no risk of breakage. However, the latter background technology also requires a double injection process because a packing for sealing must be provided on the container lid, and the same problem as requiring hygienic management of the packing is required.

Korean Registered Patent No. 10-0780813 (Locking blade-type vacuum sealed container) Korean Registered Patent Registration No. 10-0774248 (Vacuum Valve-Operated Airtight Container)

Accordingly, it is an object of the present invention to provide a container lid for a non-packing sealing which can seal a container without using a separate rubber or silicone packing, a mold apparatus for manufacturing the container lid, and a method of manufacturing the same.

According to a preferred embodiment of the present invention, the container-

A lid outer rim extending along an outer contour of the container side opening with a predetermined thickness;

A lid upper surface portion connected to the upper end of the outer rim in a vertical direction with a predetermined width;

A lid recess bottom part connected to the lid upper part through an inclined part and recessed at a relatively low height;

A valve mounting portion formed at the bottom of the cap recess and having a valve coupling hole and a sealing exhaust hole;

A tight seal part bent downward outwardly from a lower surface of the valve mounting part;

A sealing groove having a close gap between the outer rim of the lid and the close sealing portion and allowing insertion of the opening of the container;

And a lid removing grip portion formed at one position of the outer rim of the lid.

The close sealing portion is characterized in that an arc-shaped elastic lip portion formed by an inner curved portion having a relatively small lip radius and an outer curved portion having a large lip radius is included.

The elastic lip portion is formed such that its distal end is located at a position higher than the bottom surface of the outer edge of the cap.

Further, the radius center of the large lip radius is located more inward toward the center of the lid of the non-packing sealing lid than the radius center of the small lip radius, and the thickness of the elastic lip portion decreases toward the distal end.

In the meantime, the present invention provides a mold apparatus for forming a lid of a container for sealing without packing,

A lower mold support unit having a lower mold installation space recessed on an upper surface thereof;

A lifting jig receiving hole communicating with the lifting jig receiving hole in a thickness direction, a tacking molar portion having a tilting step at an upper portion thereof, and a lid lip outer surface forming groove formed around the upper surface with a radius of curvature of lip outer surface, A lower core positioned in the installation space and fixed to the lower support;

A lid lip inner surface protruding portion located above the lid lip outer surface forming groove and having an inner surface radius of curvature and a sealing groove forming protrusion corresponding to the same section in the sealing lip, A lower core edge block fixed to the support;

An ejecting jig located in the lifting jig receiving hole and moving upward;

An eject pin connected to the eject jig;

An upper mold having an injection cavity having an outline corresponding to the upper surface of the container lid and a runner communicated with the injection cavity and disposed above the lower support.

Further, the radius of curvature of the groove for forming the lid lip outer surface is formed to be larger than the radius of curvature of the lid lip inner surface forming projection.

On the other hand, as a method for molding a lid of a container for sealing without packing using the mold apparatus according to the present invention,

Attaching the ejection jig to the lower core and lowering the upper mold to bring the injection cavity close to the lower core side;

Injecting a molten resin into the injection cavity to form a lid of a non-packing sealing vessel;

Separating the upper mold from the lower mold core;

The ejection jig is moved upward to demold the sealing lid so that the sealing lid-side sealing portion of the sealing lid is elastically deformed while being separated from the lid lip outer surface forming groove and the sealing groove forming protruding portion, And the like.

The lid of the non-packing sealing vessel of the present invention does not need to use a packing means such as a rubber packing or a silicon packing as in the prior art due to the adhesion strength of the elastic sealing portion on the side of the sealing sealing portion. Therefore, the manufacturing process is economical because the double injection process is unnecessary.

Further, the construction of the container lid for sealing without packing can be simplified, and the manufacturing cost can be reduced. Also, since the separate packing is removed, the assembling process becomes unnecessary, and the food waste does not stick to the packing, and hygienic cleaning and management of the lid of the non-packing sealing container becomes convenient.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a perspective view showing one embodiment of a container lid for sealing without packing according to the present invention. Fig.
FIG. 1B is a perspective view of the packing-less sealing lid of FIG.
FIG. 2A is a perspective view showing another form of a container lid for non-packing sealing according to the present invention; FIG.
FIG. 2B is a perspective view of the non-packing sealing cap of FIG.
Fig. 3a is a front sectional view of Fig. 1a. Fig.
3B is an enlarged view of a portion 'A' in FIG. 3A.
FIG. 4A is a view illustrating a state in which the container lid for non-packing sealing is closed and the sealed container according to the present invention. FIG.
4B is an enlarged view of a portion 'B' in FIG. 4A.
5A is a perspective view showing an embodiment of a hermetically sealed container coupled with a lid of a non-packing sealing vessel according to the present invention.
FIG. 5B is a perspective view showing another form of the hermetic container combined with the lid of the non-packing sealing vessel according to the present invention. FIG.
Fig. 6 is a state before the mold apparatus according to the present invention. Fig.
Fig. 7 is an exemplary view showing the mold apparatus of Fig. 6 in an injection state; Fig.
Fig. 8 is an exemplary view showing a mold removal operation in the mold apparatus of Fig. 6; Fig.
FIG. 9A is an enlarged view of the main part of FIG. 6; FIG.
FIG. 9B is an enlarged view of a portion 'C' in FIG. 9A.
10 is a bottom plan view of a mold apparatus according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

As shown in FIGS. 1 and 2, the lid 20 for the non-packing sealing according to the present invention is characterized by using no rubber packing or silicone packing. The non-packing sealing lid 20 is formed by molding with a soft synthetic resin material.

As shown in FIGS. 4A and 4B, the container-free lid 20 is formed in a circular shape as shown in FIG. 1 or in a rectangular (or square) shape as shown in FIG. 2 to conform to the shape of the opening 10a of the container 10 . As shown in Figs. 1 to 3, the non-packing sealing lid 20 has a lid outer rim 21 having a predetermined thickness t and extending along the outer contour of the opening 10a on the side of the container 10. At this time, the lid outer rim 21 has a circular shape, a rectangular shape, and a square shape along the shape of the opening 10a of the container 10.

The non-packing sealing container lid 20 has a flat lid upper surface portion 22 which is connected to the upper end of the outer rim 21 in a vertical direction with a predetermined width. The lid upper surface portion 22 is configured to have the same thickness as the lid outer rim 21. The lid top portion 22 provides a flat support surface when laminating the container 10.

The non-packing sealing lid 20 has a lid recessed bottom portion 24 which is connected to the lid upper surface portion 22 through the inclined portion 23 and is recessed at a relatively low height by a predetermined height. The cap bottom 24 serves to prevent the valve 40, which will be described later, installed on the valve mount 25 from protruding higher than the lid upper surface 22.

The non-packing sealing lid 20 has a valve mounting portion 25 formed in the lid bottom 24 and having a valve fitting hole 25a and a sealing exhaust hole 25b. Therefore, the valve 40 is coupled to the valve fitting hole 25a, and then the valve 40 is evacuated through the exhaust hole 25b for sealing, thereby generating a negative pressure in the container, so that the vacuum sealing force can be exerted.

The non-packing sealing container lid 20 has a sealing sealing portion 26 bent downward outwardly from the lower surface of the valve mounting portion 25 along the circumference thereof and has a lid outer rim 21, A sealing groove 27 is formed between the sealing portions 26 to form an adhesive flow G as shown in FIG. 3B to allow the opening of the container 10 to be inserted.

The tight sealing portion 26 is provided with an arc-shaped elastic lip portion 261 formed by an inner curved portion 261a having a relatively small lip radius R1 and an outer curved portion 261b having a large lip radius R2. . Therefore, the elastic lip portion 261 can be more reliably adhered to the opening 10a on the side of the container 10 by elastic deformation. At this time, it is preferable that the elastic lip portion 261 is formed such that its distal end is located at a position higher than the bottom surface of the lid outer edge 21 by a predetermined amount (S). In this case, as shown in FIG. 4B, the end of the elastic lip portion 261 is located at the central portion of the sealing groove 27, and is advantageously in close contact with the opening 10a on the container 10 side.

When the resilient lip portion 261 is formed, the radial center O2 of the large lip radius R2 is relatively more toward the center of the lid 20 than the radial center O1 of the small lip radius R1 As shown in Fig. In this case, the thickness of the elastic lip portion 261 decreases toward the distal end, so that the elastic lip portion 261 has an advantage of being more flexible for increasing the adhesion.

A lid removal grip portion 28 is formed at one position of the lid outer rim 21. The lid removing gripper 28 is not limited to a specific shape because it suffices to have a proper area to be gripped by the fingers.

The non-packing sealing lid 20 constructed as described above is closed by the opening 10a on the side of the container 10 as shown in Figs. 4A and 4B to maintain the sealing.

At this time, the outer frame 21 of the lid is in close contact with the outer surface of the opening 10a on the side of the container 10 and the close sealing portion 26 is in close contact with the inner surface of the opening 10a on the side of the container 10 do. Further, the engaging portion 261 is forcibly deformed inward, and is further brought into close contact with the inner surface of the opening 10a on the side of the container 10 with greater elastic repulsive force, thereby further improving the sealing force.

Therefore, when the valve 40 is actuated to forcibly evacuate the air present in the container 10, a negative pressure is generated, so that the elastic part 261 on the side of the sealing sealing part 26 exhibits a stronger adhesion force, Can be further increased.

Thereafter, when the valve 40 is opened to remove the negative pressure in the container 10, the non-packing sealing lid 20 can be easily opened. At this time, while the sealing portion 261 of the non-packing sealing lid 20 on the side of the sealing sealing portion 26 is in contact with the inner surface of the opening 10a at the side of the container 10,

On the other hand, a mold apparatus 100 for forming and molding the container lid 20 for sealing without packing is shown in Figs. 6 to 10.

The mold apparatus 100 is provided with a lower support 110 having a lower mold installation space 112 recessed on the upper surface thereof.

The lower die support 110 is provided with a lower die core 120 which is positioned and fixed to the lower die installation space 112. The lower die core 120 includes a lifting jig receiving hole 121 penetrating in the thickness direction, a tacking molar portion 122 having an inclined step 122a at an upper portion communicating with the lifting jig receiving hole 121, And has a lid lip outer surface forming groove 123 formed with an outer radius of curvature R3.

A lower core edge block 130 is disposed around the lower core 120. The lower die core block 130 is fixed to the lower die support 110. The lower die core edge block 130 is positioned above the lid lip outer surface forming groove 123 and has the same cross section as the lid lip inner surface forming protrusion 131 and the sealing groove 27 having the inner radius of curvature R4 And corresponding sealing groove forming protrusions 132. [0031] As shown in FIG.

An ejection jig 140 is provided in the lifting jig receiving hole 121 to move up and down and return. An ejection pin 150 is connected to the ejecting jig 140. The eject pin 150 is driven up and down with a certain stroke by an unillustrated actuator.

An upper die 160 is disposed above the lower die support 110. The upper mold 160 has an injection cavity 161 having an outline corresponding to the upper surface of the sealing lid and a runner 162 communicating with the injection cavity 161.

In order to provide a flexible adhesive force of the elastic sealing portion 261 on the sealing sealing portion 26 side of the non-packing sealing lid 20, the radius of curvature R3 of the lid lip outer surface forming groove 123 is formed on the inner surface of the lid lip Is preferably larger than the radius of curvature (R4) of the projecting portion (131).

Reference numeral 170 is a 'upper guide shaft'.

A method of molding the container lid 20 for sealing without packing using the mold apparatus 100 will be described.

6, the ejection jig 140 is attached to the lower core 120, and the upper mold 16 is moved downward as shown in FIG. 7 to bring the injection cavity 161 close to the lower core 120 side Leave.

Next, the step of injecting the molten resin into the injection cavity 161 to mold the non-packing sealing lid 20 is carried out.

Next, as shown in Fig. 8, the upper mold 16 is lifted up from the lower core 120 and separated.

Thereafter, the ejection jig 140 is moved upward to demould mold the container lid 20 for the non-packing sealing, while the sealing lid-side sealing sealing portion 26 is elastically deformed, thereby forming the lid lip outer surface- And then removed from the groove forming protrusion 132 and then restored to the shape before injection separation.

The non-packing sealing lid 20 constructed and constructed as described above is required to use a packing means such as a rubber packing or a silicone packing as in the prior art due to the adhesive force of the elastic sealing portion 261 on the sealing sealing portion 26 side . Therefore, the construction of the non-packing sealing lid 20 becomes simple, and the manufacturing cost becomes low. In addition, since the separate packing is removed, the assembling process is unnecessary, and the food waste does not stick to the packing, so that hygienic cleaning and management of the non-packing sealing lid 20 can be facilitated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

21: Lid outer edge
22:
24: bottom of lid recess
26:
27: Sealing groove
28: gripper for lid removal

Claims (7)

A non-packing sealing lid (20) for sealing a container (10)
A lid outer rim 21 extending along an outer contour of the opening 10a of the container 10 with a predetermined thickness;
A lid upper surface portion 22 connected to the upper end of the outer rim 21 in a vertical direction with a predetermined width;
A cap bottom 24 connected to the lid upper surface 22 through the inclined portion 23 and relatively lowered by a predetermined height;
A valve mounting portion 25 formed in the bottom recess 24 of the cover and having a valve coupling hole 25a and a sealing exhaust hole 25b;
A sealing sealing portion 26 bent downward outwardly from a lower surface of the valve mounting portion 25;
A sealing groove (27) having a close gap (G) between the lid outer rim (21) and the close sealing portion (26) and allowing insertion of the opening of the container (10);
And a lid removal gripper (28) formed at one position of the lid outer rim (21). The method according to claim 1,
The close sealing portion 26 is provided with an arc-shaped elastic lip portion 261 formed by an inner curved portion 261a having a relatively small lip radius R1 and an outer curved portion 261b having a large lip radius R2 Wherein the lid of the non-packing sealing lid is included. 3. The method of claim 2,
Wherein the elastic lip portion (261) is formed such that its distal end is located at a position higher than the bottom surface of the outer rim (21) by a predetermined amount (S). 3. The method of claim 2,
The radius center O2 of the large lip radius R2 is positioned more inward toward the center of the packing lid 20 than the radial center O1 of the small lip radius R1 so that the elastic lip portion 261) is reduced in thickness toward the distal end. A mold apparatus for forming and forming a lid (20) for a non-packing sealing body according to claim 1,
A lower support 110 having a lower mounting space 112 recessed in an upper surface thereof;
A lifting jig receiving hole 121 penetrating in the thickness direction, a tacking molar portion 122 communicating with the lifting jig receiving hole 121 and having an inclined step 122a at an upper portion thereof, a rib outer radius curvature R3 around the upper surface, A lower core 120 which is positioned in the lower space 112 and is fixed to the lower support 110 with a groove 123 for forming a lid lip outer surface;
A lid lip inner surface protruding portion 131 located above the lid lip outer surface forming groove 123 and having an inner surface radius of curvature R4; A lower core edge block 130 disposed around the lower core core 120 and fixed to the lower mold support 110;
An eject jig (140) located in the lifting jig receiving hole (121) and moving upward;
An eject pin 150 connected to the eject jig 140;
An injection cavity 161 having an outline corresponding to the upper surface of the container lid 20 and a runner 162 communicating with the injection cavity 161 and having an upper mold 160 disposed above the lower mold support 110 The sealing apparatus according to any one of claims 1 to 3, 6. The method of claim 5,
Wherein the curvature radius R3 of the lid lip outer surface forming groove 123 is configured to be larger than the radius of curvature R4 of the lid lip inner surface forming projection 131. [ Mold device. A method for molding a lid (20) for a non-packing sealing body according to claim 1 using the mold apparatus according to claim 5,
Attaching the ejection jig 140 to the lower mold core 120 and lowering the upper mold 16 to bring the injection cavity 161 closer to the lower core core 120 side;
Injecting a molten resin into the injection cavity (161) to form a lid (20) for sealing without packing,
Separating the upper mold (16) from the lower mold core (120);
The sealing lid is disengaged by moving the eject jig 140 upward so that the sealing lid-side sealing sealing portion 26 is elastically deformed to separate from the lid lip outer surface forming groove 123 and the sealing groove forming protruding portion 132 And then returning to a state before the injection separation.

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