CN111038837B - High-sealing twist cover with strong adaptability - Google Patents
High-sealing twist cover with strong adaptability Download PDFInfo
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- CN111038837B CN111038837B CN201811192274.XA CN201811192274A CN111038837B CN 111038837 B CN111038837 B CN 111038837B CN 201811192274 A CN201811192274 A CN 201811192274A CN 111038837 B CN111038837 B CN 111038837B
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- Prior art keywords
- wall
- cover
- sealing ring
- opening
- bridge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
- B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
- B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
- B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
- B65D41/325—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings with integral internal sealing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
- B65D53/04—Discs
Abstract
The invention discloses a high-sealing twist cover with strong adaptability, wherein a sealing gasket is arranged on the lower surface of a cover top, two concentric inner sealing rings and two concentric outer sealing rings are integrally extended downwards from the outer periphery of the sealing gasket, the outer wall of each inner sealing ring and the inner wall of each outer sealing ring are obliquely arranged, a V-shaped groove with a downward opening is formed between each inner sealing ring and each outer sealing ring, the opening angle alpha of each V-shaped groove is 28-42 degrees, and an arc bottom is formed at the bottom of the V-shaped groove close to the cover top; the lower part of the cover wall is provided with a plurality of strip-shaped notches along the circumferential direction of the cover wall, and the cover wall between the adjacent notches forms a bridge. The problem that the cover-turning sealing gasket in the prior art is poor in sealing performance and poor in guidance quality is effectively solved, the requirements on the sealing performance and the guidance quality of the cover-turning sealing gasket can be met, the container mouth with multiple structures can be adapted, and the practical value is high.
Description
Technical Field
The invention relates to the technical field of packaging containers, in particular to a high-sealing twist cover with strong adaptability.
Background
Food safety has been an important concern in the industry, and the good sealing properties of food packaging container lids ensure that the food is safe after storage. The material and shape of the sealing gasket of the cover and the matching condition of the opening (bottle mouth) of the can determine the quality of the sealing performance. Currently, a flat rubber pad, an L-shaped pad or a U-shaped pad is mostly used as a common sealing pad of a cover. After the flat rubber pad is matched with the tank opening for sealing the tank, the top of the tank opening is in compression interference with the rubber pad to ensure sealing (see figure 12), which is called top sealing in the industry; after the L-shaped pad is matched with the tank opening for sealing the tank, the top and the inner side of the tank opening are in compression interference with the rubber pad to ensure sealing (see figure 13), which is called as top sealing and inner side sealing in the industry; after the U-shaped pad and the tank opening are matched for sealing the tank, the top, the outer side and the inner side of the tank opening are compressed and interference-sealed with the rubber pad (see figure 14), the sealing is better, and the sealing is called as triple sealing in the industry: top seal + outside seal + inside seal. Under the same tank height and the same tank sealing parameters, the three rubber cushions can ensure the sealing performance, and the opening torque U-shaped cushion is larger than the L-shaped cushion and is larger than the flat rubber cushion as can be seen from the compression amount of the rubber cushions; when the height of the tank is lower (more than 0.3mm lower than the normal tank height), the flat rubber gasket is completely separated from the tank opening under the same tank sealing parameters, and the sealing (top sealing) is invalid; the L-shaped pad is basically separated from the tank opening, the top seal is invalid, the compression amount of the inner side rubber sealing pad is almost zero, and the L-shaped pad and the tank opening can be considered as equivalent invalid; the top of the U-shaped pad is separated from the tank opening, the inner side and the outer side of the U-shaped pad are still in contact with the tank opening, the top seal fails, and the inner side seal and the outer side seal can also be kept; when the tank mouth is out of round, larger or smaller, the flat rubber cushion has stronger sealing adaptability but no good guiding function, so that the cover is easily sleeved in the center and deviates greatly, and the cover is inclined; although the L-shaped rubber pad and the U-shaped rubber pad have a certain inner side sealing and guiding function, when a tank opening is out of round and the tank opening is larger or smaller, the cover is easy to be unsmooth (the tank opening is difficult to enter the rubber pad), and the cover is damaged when the cover is sealed. To sum up, the flat cushion, the L-shaped cushion or the U-shaped cushion in the prior art all have the problem of poor sealing or poor guidance quality to different degrees under different working conditions.
On the other hand, the bridge on the twist cover in the prior art is generally rectangular and is vertically connected with the anti-theft ring on the twist cover, and when the cover body is rotated, the bridge is broken under the action of torsion (transverse shearing force) generated by rotation of the cover body, namely, only when the bridge is broken, the twist cover can be rotated to open. The rectangular bridging structure is characterized in that the material is subjected to yield fracture after being subjected to larger transverse shearing force, the fracture point is basically in the middle of the bridging (see figure 11), the torsion required during twisting is larger, the torsion required for rotating the cover body after fracture is suddenly reduced, a hand holding the cover body is forced to rotate at an angle along with the cover body quickly because the force is not removed soon, therefore, the opening difficulty is increased, the bridging and the edge of a cut are basically exposed outside, a plurality of sharp fracture points are formed after the bridging is twisted off, and the hand stopping and rotating along with the cover body quickly is easily scratched by a theft-proof ring or a sharp object on a bottle body (note that the sharp object exists at the mold joint of some plastic bottle bodies except the sharp object on the theft-proof ring), and a great potential safety hazard exists.
Disclosure of Invention
The invention aims to solve the problems of poor sealing performance and poor guidance quality of a twist-off cover sealing gasket in the prior art, provides a high-sealing-performance twist-off cover with strong adaptability, and can meet the requirements of the sealing performance and the guidance quality of the twist-off cover sealing gasket.
Another object of the present invention is to provide a twist-off cover with high sealing performance, which has high adaptability, needs a small opening force and can greatly improve the safety of the twist-off cover during opening, in order to solve the problems that the twist-off cover in the prior art requires a large opening force during opening and an operator is easily injured.
The invention adopts a specific scheme that the twist-off cover with strong adaptability and high sealing performance is used for sealing the opening part of a container, the twist-off cover comprises a cover top and a cylindrical cover wall formed by downward extension of the outer edge of the cover top, a sealing gasket is arranged on the lower surface of the cover top, two inner sealing rings and two outer sealing rings which are concentrically arranged are integrally extended downwards on the peripheral part of the sealing gasket, the outer wall of each inner sealing ring and the inner wall of each outer sealing ring are obliquely arranged, a V-shaped groove with a downward opening is formed between each inner sealing ring and each outer sealing ring, the opening angle alpha of each V-shaped groove is 28-42 degrees, the included angles between the inner wall and the outer wall and the central line of the V-shaped groove are equal, an arc-shaped bottom is formed at the bottom of the V-shaped groove close to the cover top, and the width of the arc-shaped bottom is smaller than the wall thickness of the opening part of the container; the lower part of the cover wall is provided with a plurality of strip-shaped incisions along the circumferential direction of the cover wall, the incisions penetrate through the cover wall, the cover wall below the incisions forms an anti-theft ring for twisting the cover, the cover wall between the adjacent incisions forms a bridge, and the anti-theft ring is connected with the cover wall above the incisions through the bridge. According to the twist-off cover, the inner sealing ring and the outer sealing ring are arranged at the matching part of the periphery of the sealing gasket and the container opening, and the V-shaped groove for being sleeved in the container opening is formed between the two sealing rings, so that after the container opening enters the V-shaped groove, the inner wall of the outer sealing ring is tightly attached to the outer wall of the container opening to form outer sealing, and the outer wall of the inner sealing ring is tightly attached to the inner wall of the container opening to form inner sealing, so that the container opening can be well sealed, meanwhile, the inner wall and the outer wall of the V-shaped groove which are obliquely arranged can play a good role in guiding the entering of the container opening, can adapt to container openings with various structures, have good adaptability, and solve the problems of poor sealing and poor guiding performance of the sealing gasket of the twist-off cover in the prior art. On the other hand, because the width of the arc-shaped bottom of the V-shaped groove is smaller than the wall thickness of the container opening, when the cover is turned to close the container opening, an isolation cavity (a space between the arc-shaped bottom and the container opening) is formed between the arc-shaped bottom of the V-shaped groove and the container opening, and the isolation cavity isolates the outer seal between the inner wall of the outer sealing ring and the outer wall of the container opening from the inner seal between the outer wall of the inner sealing ring and the inner wall of the container opening, so that the sealing effect between the sealing gasket and the container opening can be further improved.
Preferably, the height of the cross section of the inner sealing ring is greater than that of the cross section of the outer sealing ring (namely, the length of the downward extension of the inner sealing ring is greater than that of the downward extension of the outer sealing ring), the inner wall of the inner sealing ring and the outer wall of the outer sealing ring are both perpendicular to the cover top, and arc-shaped guide surfaces are arranged between the lower ends of the inner sealing ring and the outer sealing ring and the groove wall of the V-shaped groove. The inner sealing ring and the outer sealing ring have enough heights, namely when the twist cover moves a certain distance in the axial direction but the anti-theft ring is not broken, the inner sealing ring and the outer sealing ring have enough lengths to be attached to the inner wall and the outer wall of the container opening, and sealing between the inner sealing ring and the outer sealing ring and the inner wall and the outer wall of the container opening before the twist cover is not opened (the anti-theft ring is not broken) is ensured; the arc-shaped guide surface plays a role in guiding when the container opening enters the V-shaped groove.
Preferably, the height of the cross section of the inner sealing ring is the same as that of the cross section of the outer sealing ring, the inner wall of the inner sealing ring and the outer wall of the outer sealing ring are perpendicular to the cover top, arc-shaped guide surfaces are arranged between the lower ends of the inner sealing ring and the outer sealing ring and the groove wall of the V-shaped groove, and the groove walls on two sides of the V-shaped groove are of symmetrical structures.
Preferably, an annular tapered wall with a small upper part and a large lower part is formed on the cover wall close to the cover top, the upper section of the tapered wall is tightly attached to the outer sealing ring to form an outer sealing ring squeezing part, when the cover is unscrewed to seal the container opening, the pressure of the outer sealing ring on the outer wall of the container opening is greater than the pressure of the inner sealing ring on the inner wall of the container opening, and the vertex angle of the tapered wall is 20-40 degrees. According to the invention, the annular tapered wall with a small upper part and a large lower part is formed on the cover wall close to the cover top, namely the upper section of the twist cover is of a tapered structure with a small upper part and a large lower part, the cross section of the cover wall of the section is inclined, the outer sealing ring is extruded by the tapered wall to form the extruding part, so that the inner side surface of the outer sealing ring is tightly attached to the outer wall of the container opening after being extruded by the extruding part, and the pressure of the outer sealing ring on the outer wall of the container opening is greater than that of the inner sealing ring on the inner wall of the container opening, thus ensuring the sealing of the outer sealing ring on the container opening; meanwhile, the extruding part of the invention is in a conical structure with a small upper part and a large lower part, so that the twist cover is easy to fall off from the container opening when the twist cover is opened, the problem that the twist cover is difficult to open due to large friction force generated on two sides when the twist cover is opened in the mode that the U-shaped pad compresses the container opening through the cover top, the inner side and the outer side in the traditional process is solved, and the twist cover is convenient to open on the premise of ensuring sealing.
Preferably, the bridge is an obliquely arranged equal-width structure, and one end of the bridge, which is close to the cover top, is taken as a reference, and the end, connected with the anti-theft ring, of the bridge is deviated towards the right side; an upper acute angle is formed between the right side of the upper end of the bridge and the cut on the right side of the bridge, and a lower acute angle is formed between the left side of the lower end of the bridge and the cut on the left side of the bridge. The bridge between the connecting cover body and the anti-theft ring is designed to be in inclined connection (the whole bridge is in a diamond shape), an upper acute angle is formed between the right side of the upper end of the bridge and the notch on the right side of the bridge, a lower acute angle is formed between the left side of the lower end of the bridge and the notch on the left side of the bridge, and stress concentration points are formed at the corners of the upper acute angle and the lower acute angle, so that the upper acute angle and the lower acute angle are easily torn at the corners of the upper acute angle and the lower acute angle. The anti-theft ring is clamped after rotating a small angle when the twist cover is opened, the cover body continues to rotate anticlockwise, the bridge is firstly pulled to the position vertical to the anti-theft ring, the upper part of the bridge is then inclined to the right and then is fractured, the bridge fracture needs a process, and the bridge fracture cannot be fractured suddenly like the bridge in the prior art. In addition, the bridge is formed into an inclined structure, only the bridge deforms when the bridge is straightened, the required torsion is small, the bridge starts to crack when the bridge is straightened due to the stress concentration point at the acute angle part of the bridge, and the bridge is completely cracked after the bridge is rotated, so that the bridge cracking process is also a gradual change process, the torsional force of the bridge is obviously smaller than that of the conventional scheme, and the buffer function is achieved.
Preferably, the included angle between the central line of the bridge and the horizontal plane is 45-75 degrees; the bridge is provided with an upper pre-split opening at the connecting part of the upper acute angle, the upper pre-split opening extends along the circumferential direction of the cover wall, the opening of the upper pre-split opening is communicated with the notch, and the length of the upper pre-split opening in the circumferential direction of the cover wall is 10-20% of the width of the bridge. The pre-splitting opening is arranged at the connecting part of the bridge and the upper acute angle, so that the force required for tearing the upper part of the bridge when the cover rotates is smaller, and the cover can be opened more conveniently by twisting. Meanwhile, the pre-split is arranged at the connecting part of the bridge and the upper acute angle, so that the upper end of the bridge can be ensured to be firstly broken, the broken points of the bridge are consistent and neat, and the broken residual sections of the bridge are all left on one side of the anti-theft ring due to the fact that the upper end of the bridge is firstly broken, and the repeated use of the cover is facilitated.
Preferably, the bridge is formed with a lower pre-split at the connection with the lower acute angle, the lower pre-split extends along the circumferential direction of the cover wall and the opening of the lower pre-split is communicated with the notch, and the length of the lower pre-split in the circumferential direction of the cover wall is 50-70% of the length of the upper pre-split. The connecting portion setting of bridge and lower acute angle is split in advance down and can be so that the lid is opened more easily, and the length of split in advance is less than the length of split in advance down simultaneously, and the anti-theft ring one side has all been stayed to the remaining section after the bridge fracture, is favorable to the used repeatedly of lid. In addition, the upper pre-splitting opening and the lower pre-splitting opening can be synchronously formed by improving the die structure when the notch is punched, and the appearance of the twist cover cannot be influenced because the upper pre-splitting opening and the lower pre-splitting opening are micro-splits.
Preferably, the upper part of the cover wall is provided with a plurality of internal pressure release openings punched inwards along the circumferential direction of the cover wall, and the cover wall at the lower side edge of the internal pressure release openings is bent inwards to form an inwards inclined plane structure. The internal pressure release port is used for releasing gas or liquid in the container in time when the pressure in the container is overlarge, so that the serious result caused by direct flying of a twist cover due to overlarge pressure in the container is avoided.
Preferably, the lower part of the cover wall is provided with two mutually parallel convex rings surrounding the cover wall, an annular groove is formed between the two convex rings, and the notch and the bridging are arranged at the groove bottom of the annular groove. According to the invention, the two convex rings which are parallel to each other and surround the cover wall are arranged between the lower part of the cover body and the anti-theft ring, the annular groove is formed between the two convex rings, the cut for separating the anti-theft ring and the bridging frame between the adjacent cuts are arranged at the groove bottom of the annular groove, so that the cuts and the bridging frame are positioned at the concave part of the groove when the cover is turned and turned, the palm of an operator is not easily contacted, and the palm can be prevented from being injured by sharp pricks after the anti-theft ring is broken (namely the bridging frame is broken). Therefore, the invention solves the problems that the twist cover in the prior art needs large opening force in the cover opening process and an operator is easy to be injured, greatly facilitates the opening of the twist cover and improves the safety of the twist cover in the opening process.
The invention has the beneficial effects that: the problem that the twisted cover sealing gasket in the prior art is poor in sealing performance and poor in guidance quality is effectively solved, the twisted cover sealing gasket can adapt to container openings of various structures, and the requirements on the sealing performance and the guidance quality of the twisted cover sealing gasket can be met. Meanwhile, the invention also solves the problems that the twist cover in the prior art needs large opening force in the opening process and an operator is easy to be injured, and greatly improves the safety of the twist cover in the opening process.
Drawings
FIG. 1 is a schematic view of one construction of the twist-off cap of the present invention;
FIG. 2 is an enlarged view of a portion of the twist-off cap of the present invention;
FIG. 3 is another enlarged partial view of the twist cap of the present invention;
FIG. 4 is another enlarged partial view of the twist cap of the present invention;
FIG. 5 is another schematic illustration of the twist-off cap of the present invention;
FIG. 6 is an enlarged view of a portion of the twist-off cover bridge of the present invention;
FIG. 7 is another enlarged partial view of the twist-off cap bridge of the present invention;
FIG. 8 is an enlarged view of a portion of the twist-off cover at the initial stage of fracture at the bridge opening of the present invention;
FIG. 9 is an enlarged fragmentary view of the end of the break at the twist-off lid bridging portion of the present invention;
FIG. 10 is an enlarged view of a portion of the twist-off cover of the present invention at a bridge break;
FIG. 11 is an enlarged view of a portion of a prior art twist-off cover at a bridge break;
FIG. 12 is an enlarged fragmentary view of a prior art twist-off cap liner closing the mouth of a container;
FIG. 13 is an enlarged fragmentary view of the prior art twist-off cap L-shaped gasket closing the mouth of the container;
FIG. 14 is an enlarged fragmentary view of the prior art twist-off cap U-shaped gasket normally closing the mouth of the container;
FIG. 15 is an enlarged fragmentary view of the twist-off cap seal of the present invention normally closing the mouth of the container;
FIG. 16 is an enlarged partial view of a prior art twist-off cap U-shaped gasket closing the mouth of a container (the container mouth is 0.3mm lower);
FIG. 17 is an enlarged fragmentary view of the twist-off cap seal of the present invention closing the mouth of the container (the mouth of the container being 0.3mm lower);
FIG. 18 is an enlarged partial view of a prior art twist-off cap U-shaped gasket closing the mouth of a container (the container mouth is 0.5 mm lower);
FIG. 19 is an enlarged fragmentary view of the twist-off cap seal of the present invention closing the mouth of the container (0.5 mm lower mouth);
FIG. 20 is an enlarged partial view of a prior art twist-off cap U-shaped gasket closing the mouth of a container (with the mouth of the container being 0.15 mm larger on a single side);
FIG. 21 is an enlarged fragmentary view of the twist-off cap seal of the present invention closing the mouth of the container (with the mouth of the container being 0.15 mm larger on a single side);
FIG. 22 is a close-up view of a prior art twist-off cap U-shaped gasket closing the mouth of a container (the mouth of the container is 0.2 mm smaller on a single side);
FIG. 23 is an enlarged view of a portion of the twist-off cap seal of the present invention closing the mouth of the container (the mouth being 0.2 mm smaller on one side);
FIG. 24 is an enlarged partial view of a prior art twist-off cap U-shaped gasket closing the mouth of a container (with the mouth of the container entering the gasket);
figure 25 is an enlarged view of a portion of the twist-off cap seal of the present invention closing the mouth of the container (as the container mouth enters the seal).
In the figure: 1. the novel anti-theft cap comprises a cap top, 2. a cap wall, 3. a sealing gasket, 4. an inner sealing ring, 5. an outer sealing ring, 6. an outer wall of the inner sealing ring, 7. an inner wall of the outer sealing ring, 8. a V-shaped groove, 9. an arc-shaped bottom, 10. a container opening, 11. a notch, 12. an anti-theft ring, 13. a bridge, 14. an inner wall of the inner sealing ring, 15. an outer wall of the outer sealing ring, 16. an arc-shaped guide surface, 17. an annular conical wall, 18. an outer sealing ring extrusion part, 19. an upper acute angle, 20. a lower acute angle, 21. an upper pre-split, 22. a lower pre-split, 23. an inner pressure release opening, 24. a convex ring, 25. an annular groove and 26. an isolation cavity.
Detailed Description
The following further describes embodiments of the present invention by way of examples, with reference to the accompanying drawings.
Example 1
In embodiment 1 shown in fig. 1, a twist-off cap with strong adaptability and high sealing performance is used for sealing the opening of a container, the twist-off cap comprises a cap top 1 and a cylindrical cap wall 2 formed by downward extending of the outer edge of the cap top, a sealing gasket 3 is arranged on the lower surface of the cap top, two inner sealing rings 4 and two outer sealing rings 5 which are concentrically arranged are integrally extended downwards on the outer peripheral part of the sealing gasket, an outer wall 6 of each inner sealing ring and an inner wall 7 of each outer sealing ring are obliquely arranged (see fig. 2), a V-shaped groove 8 with a downward opening is formed between each inner sealing ring and each outer sealing ring, the opening angle alpha of the V-shaped groove is 28 degrees, the included angles between the inner wall and the outer wall and the center line of the V-shaped groove are equal, an arc-shaped bottom 9 is formed at the bottom of the V-shaped groove close to the cap top, the width of the arc-shaped bottom is smaller than the wall thickness of the opening 10 of the container, when the sealing gasket of the twist-off cap closes the opening of the container, the arcuate base of the V-shaped groove forms with the container mouth an isolation chamber 26 (the space between the arcuate base and the container mouth, see fig. 15, 17, 19 and 21) that isolates the outer seal between the inner wall of the outer seal ring and the outer wall of the container mouth from the inner seal between the outer wall of the inner seal ring and the inner wall of the container mouth. In this embodiment, the height of the cross section of the inner sealing ring is greater than that of the cross section of the outer sealing ring, the inner wall 14 of the inner sealing ring and the outer wall 15 of the outer sealing ring are both perpendicular to the cover top, and arc-shaped guide surfaces 16 are arranged between the lower ends of the inner sealing ring and the outer sealing ring and the groove wall of the V-shaped groove. The lower part of the cover wall is provided with a plurality of strip-shaped notches 11 along the circumferential direction of the cover wall, the notches penetrate through the cover wall, the cover wall below the notches forms an anti-theft ring 12 for twisting the cover, the cover wall between adjacent notches forms a bridging 13, and the anti-theft ring is connected with the cover wall above the notches through the bridging. The upper part of the cover wall is provided with a plurality of internal pressure release openings 23 which are punched inwards along the circumferential direction of the cover wall, and the cover wall at the lower side of the internal pressure release openings is bent inwards to form an inwards inclined plane structure.
Example 2
In embodiment 2 shown in fig. 3, the height of the cross section of the inner seal ring is the same as that of the cross section of the outer seal ring, the inner wall of the inner seal ring and the outer wall of the outer seal ring are both perpendicular to the cap top, arc-shaped guide surfaces are arranged between the lower ends of the inner and outer seal rings and the groove wall of the V-shaped groove, the opening angle α of the V-shaped groove is 42 degrees, the groove walls on both sides of the V-shaped groove are of a symmetrical structure, and the rest is the same as that in embodiment 1.
Example 3
In embodiment 3 shown in fig. 4, a small-top and large-bottom annular tapered wall 17 is formed on the cap wall close to the cap top, an upper section of the tapered wall is tightly attached to the outer sealing ring to form an outer sealing ring pressing part 18, when the cap is unscrewed to cap the container opening, the pressure of the outer sealing ring on the outer wall of the container opening is greater than the pressure of the inner sealing ring on the inner wall of the container opening, the apex angle of the tapered wall is 20 to 40 degrees (30 degrees in this embodiment), and the rest is the same as that in embodiment 1 or embodiment 2.
Example 4
In the embodiment 4 shown in fig. 5 and 6, the bridge is an equi-width structure which is obliquely arranged, and one end of the bridge, which is close to the cover top, is taken as a reference, and the end of the bridge, which is connected with the anti-theft ring, is deviated towards the right side; an upper acute angle 19 is formed between the right side of the upper end of the bridge and the cut on the right side of the bridge, and a lower acute angle 20 is formed between the left side of the lower end of the bridge and the cut on the left side of the bridge. The included angle between the central line of the bridge and the horizontal plane is 45-75 degrees (55 degrees in the embodiment); the lower part of the cover wall is provided with two mutually parallel convex rings 24 which surround the cover wall, an annular groove 25 is formed between the two convex rings, and the notch and the bridging are arranged at the groove bottom of the annular groove, and the rest is the same as that of the embodiment 1, the embodiment 2 or the embodiment 3.
Example 5
In embodiment 5 shown in fig. 7, the bridge is formed with an upper pre-split 21 at the connection part of the upper acute angle, the upper pre-split extends along the circumferential direction of the cover wall and the opening of the upper pre-split is communicated with the notch, and the length of the upper pre-split in the circumferential direction of the cover wall is 15% of the width of the bridge; the bridge bridges the junction with the lower acute angle forming a lower pre-split 22 extending in the circumferential direction of the lid wall and having its opening communicating with the cut, the length of the lower pre-split in the circumferential direction of the lid wall being 60% of the length of the upper pre-split, the rest being the same as in example 4.
According to the twist-off cap, the inner sealing ring and the outer sealing ring are arranged at the matching part of the periphery of the sealing gasket and the container opening, and the V-shaped groove for being sleeved in the container opening is formed between the two sealing rings, so that after the container opening enters the V-shaped groove, the inner wall of the outer sealing ring is tightly attached to the outer wall of the container opening to form outer sealing, and the outer wall of the inner sealing ring is tightly attached to the inner wall of the container opening to form inner sealing, so that the container opening can be well sealed (see figure 15).
When the container opening is lower (the container opening is lower by 0.3mm in the figure), the sealing structure (see fig. 17) of the invention has more sealing compression amount (the sealing compression area of the invention is 0.1 square mm, and the sealing compression area of the U-shaped pad is 0.03 square mm) compared with the U-shaped pad (see fig. 16) structure with better sealing performance in the prior art, thereby having better sealing performance.
When the container mouth is lower by 0.5 mm, compared with the U-shaped pad (see fig. 18) structure with better sealing performance in the prior art, the sealing structure (see fig. 19) of the invention has a small amount of contact surfaces between the two sides of the V-shaped groove and the container mouth, and the U-shaped pad only has a small amount of contact between one side of the U-shaped pad and the container mouth.
When the single side of the container opening is 0.15 mm larger, compared with the U-shaped gasket (shown in figure 20) structure with better sealing performance in the prior art, the sealing structure (shown in figure 21) of the invention has a small contact surface between the inner side of the V-shaped groove and the container opening, and the outer sealing compression amount is increased; and the sealing between the inner side of the U-shaped gasket and the container opening fails, and the outside sealing compression amount is increased. The case where the container mouth is enlarged on one side means that the container mouth is enlarged in diameter or the container mouth is displaced to one side.
When the sealing gasket seals the container opening, compared with the structure of the U-shaped gasket (shown in figure 22) with better sealing performance in the prior art, the sealing structure (shown in figure 23) of the invention has smaller container opening (when the single side is smaller by 0.2 mm), and the resistance of the V-shaped groove entering the container opening is smaller as can be seen from the figure; and the U-shaped groove of the U-shaped pad has larger resistance. For the situation that the mouth of the container is bigger (when one side is bigger by 0.2 mm), the sealing structure (see fig. 25) of the invention is compared with the structure of the U-shaped pad (see fig. 24) with better sealing performance in the prior art, and as can be seen from the figure, the left side and the right side of the V-shaped groove of the invention have guiding function to the mouth of the container, and the mouth of the container can easily enter the V-shaped groove; the U-shaped gasket only has a guiding function on one side, and the phenomenon of 'cover tilting' is easy to occur when the sealing gasket seals the container opening.
In conclusion, compared with the sealing gasket structure in the prior art, the sealing gasket structure has better sealing performance and sealing guide performance, can adapt to container openings with various structures, has good adaptability, and solves the problems of poor sealing performance and poor guide performance of the sealing gasket for the twist-off cover in the prior art. Meanwhile, the width of the arc-shaped bottom of the V-shaped groove is smaller than the wall thickness of the container opening, so when the cover is turned to close the container opening, an isolation cavity is formed between the arc-shaped bottom of the V-shaped groove and the container opening, the isolation cavity isolates the outer seal between the inner wall of the outer sealing ring and the outer wall of the container opening from the inner seal between the outer wall of the inner sealing ring and the inner wall of the container opening, and the sealing effect between the sealing gasket and the container opening can be further improved.
On the other hand, the bridge connecting the cover body and the anti-theft ring is designed to be in inclined connection (a diamond structure), the inclined direction is that the upper part is towards the left and the lower part is towards the right, the anti-theft ring is clamped after rotating a small angle when the twist cover is opened, the cover body continues to rotate anticlockwise, the upper pre-split port at the upper end is firstly torn after the bridge is straightened, the length of the split port is lengthened (shown in figure 8), the cover body continues to rotate anticlockwise, the upper end of the bridge is inclined towards the right, the length of the upper pre-split port is further lengthened (shown in figure 9) until the upper end of the bridge is completely broken, the cuts at two sides of the bridge are communicated, and the broken residual sections of the bridge are all left at one side of the anti-theft ring (shown in figure 10). The bridge breaking process is a gradual change process, and the twisting-off force of the bridge breaking process is obviously smaller than that of the conventional scheme, so that the bridge breaking process has a buffering function. Secondly, two convex rings which are parallel to each other and surround the cover wall are arranged between the lower part of the cover body and the anti-theft ring, an annular groove is formed between the two convex rings, and the cut for separating the anti-theft ring and the bridging between the adjacent cuts are arranged at the groove bottom of the annular groove, so that the cut and the bridging are both positioned at the concave part of the groove and are not easy to contact with the palm of an operator when the cover is turned and twisted, the palm and the sharp prick after the anti-theft ring is broken (namely the bridging is broken) can be avoided, and the safety of the twisted cover in the opening process is improved.
In addition to the above embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.
Claims (6)
1. The twist cover with strong adaptability and high sealing performance is used for sealing the opening of a container and is characterized by comprising a cover top (1) and a cylindrical cover wall (2) formed by downward extension of the outer edge of the cover top, a sealing gasket (3) is arranged on the lower surface of the cover top, two concentric inner sealing rings (4) and two concentric outer sealing rings (5) are integrally extended downwards from the periphery of the sealing gasket, the outer wall (6) of each inner sealing ring and the inner wall (7) of each outer sealing ring are obliquely arranged, a V-shaped groove (8) with a downward opening is formed between each inner sealing ring and each outer sealing ring, the opening angle alpha of each V-shaped groove is 28-42 degrees, the included angles between the inner wall and the outer wall and the center line of the V-shaped groove are equal, an arc-shaped bottom (9) is formed at the bottom of the V-shaped groove close to the cover top, and the width of the arc-shaped bottom is smaller than the wall thickness of the opening (10) of the container; the lower part of the cover wall is provided with a plurality of strip-shaped notches (11) along the circumferential direction of the cover wall, the notches penetrate through the cover wall, the cover wall below the notches forms an anti-theft ring (12) for twisting the cover, the cover wall between adjacent notches forms a bridge (13), and the anti-theft ring is connected with the cover wall above the notches through the bridge; when the sealing gasket of the twist-off cover seals the opening of the container, an isolation cavity (26) is formed between the arc-shaped bottom of the V-shaped groove and the opening of the container, and the isolation cavity isolates the outer seal between the inner wall of the outer sealing ring and the outer wall of the container opening from the inner seal between the outer wall of the inner sealing ring and the inner wall of the container opening; the bridge is an obliquely arranged equal-width structure, and one end of the bridge, which is close to the cover top, is used as a reference, and the end of the bridge, which is connected with the anti-theft ring, deviates to the right side; an upper acute angle (19) is formed between the right side of the upper end of the bridge and the cut on the right side of the bridge, and a lower acute angle (20) is formed between the left side of the lower end of the bridge and the cut on the left side of the bridge; the included angle between the central line of the bridge and the horizontal plane is 45-75 degrees; an upper pre-split (21) is formed at the connecting part of the bridging and the upper acute angle, the upper pre-split extends along the circumferential direction of the cover wall, the opening of the upper pre-split is communicated with the notch, and the length of the upper pre-split in the circumferential direction of the cover wall is 10-20% of the width of the bridging; the bridge and the connection part of the lower acute angle are provided with a lower pre-splitting opening (22), the lower pre-splitting opening extends along the circumferential direction of the cover wall, the opening of the lower pre-splitting opening is communicated with the notch, and the length of the lower pre-splitting opening in the circumferential direction of the cover wall is 50-70% of the length of the upper pre-splitting opening.
2. The twist cap with strong adaptability and high sealing performance as claimed in claim 1, characterized in that the height of the cross section of the inner sealing ring is greater than that of the cross section of the outer sealing ring, the inner wall (14) of the inner sealing ring and the outer wall (15) of the outer sealing ring are both perpendicular to the cap top, and arc-shaped guide surfaces (16) are arranged between the lower ends of the inner sealing ring and the outer sealing ring and the wall of the V-shaped groove.
3. The twist cap with strong adaptability and high sealing performance as claimed in claim 1, wherein the cross section of the inner sealing ring has the same height as that of the outer sealing ring, the inner wall of the inner sealing ring and the outer wall of the outer sealing ring are both perpendicular to the cap top, arc-shaped guide surfaces are arranged between the lower ends of the inner sealing ring and the outer sealing ring and the wall of the V-shaped groove, and the two side walls of the V-shaped groove are of symmetrical structures.
4. The twist cap with strong adaptability and high sealing performance as claimed in claim 1, wherein an annular tapered wall (17) with a small top and a large bottom is formed on the cap wall close to the cap top, the upper section of the tapered wall is tightly attached to the outer sealing ring to form an outer sealing ring pressing part (18), when the twist cap is used for sealing the container opening, the pressure of the outer sealing ring on the outer wall of the container opening is greater than that of the inner sealing ring on the inner wall of the container opening, and the vertex angle of the tapered wall is 20-40 degrees.
5. The twist-off cover with strong adaptability and high sealability as claimed in claim 1, wherein the upper portion of the cover wall is provided with a plurality of inwardly punched internal pressure relief ports (23) along the circumferential direction of the cover wall, and the cover wall of the lower side of the internal pressure relief ports is bent inwardly to form an inwardly inclined slope structure.
6. A flexible, highly sealable twist-off lid according to claim 1 or 2 or 3 or 4 or 5, characterized in that the lower part of the lid wall is provided with two parallel collars (24) surrounding the lid wall, between which collars there is formed an annular groove (25), said cut-outs and bridges being provided at the bottom of the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811192274.XA CN111038837B (en) | 2018-10-12 | 2018-10-12 | High-sealing twist cover with strong adaptability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811192274.XA CN111038837B (en) | 2018-10-12 | 2018-10-12 | High-sealing twist cover with strong adaptability |
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| Publication Number | Publication Date |
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| CN111038837A CN111038837A (en) | 2020-04-21 |
| CN111038837B true CN111038837B (en) | 2021-09-07 |
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| CN201811192274.XA Active CN111038837B (en) | 2018-10-12 | 2018-10-12 | High-sealing twist cover with strong adaptability |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911747A (en) * | 2005-08-09 | 2007-02-14 | 日本皇冠塞株式会社 | Metallic container closure having internal pressure release function |
| CN104053610A (en) * | 2011-12-27 | 2014-09-17 | 希赛瓶盖系统日本有限公司 | Synthetic resin cap, synthetic resin cap liner, closure device and beverage-containing closure device |
| CN107161514A (en) * | 2017-06-28 | 2017-09-15 | 山东丽鹏股份有限公司 | Sealing metal container lid |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2964359B2 (en) * | 1991-04-18 | 1999-10-18 | 日本クラウンコルク株式会社 | Metal container lid and weakening line forming device |
| IL110654A (en) * | 1993-08-19 | 1997-11-20 | Precision Valve Australia | Linerless closure for container |
| CN2521158Y (en) * | 2001-03-26 | 2002-11-20 | 陈育福 | Bottle cap |
| JP4698090B2 (en) * | 2001-08-31 | 2011-06-08 | 大和製罐株式会社 | Metal Pilfer Proof Cap |
| CN2814033Y (en) * | 2005-08-16 | 2006-09-06 | 吕石部 | Rubber double-sealing structure |
| KR100778825B1 (en) * | 2006-06-26 | 2007-11-22 | 세왕금속공업주식회사 | Bottle cap |
| MX2015008677A (en) * | 2015-07-03 | 2017-01-02 | Fabricas Monterrey Sa De Cv | Cover cap with fitted gasket designed for sealing a metallic bottle. |
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- 2018-10-12 CN CN201811192274.XA patent/CN111038837B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1911747A (en) * | 2005-08-09 | 2007-02-14 | 日本皇冠塞株式会社 | Metallic container closure having internal pressure release function |
| CN104053610A (en) * | 2011-12-27 | 2014-09-17 | 希赛瓶盖系统日本有限公司 | Synthetic resin cap, synthetic resin cap liner, closure device and beverage-containing closure device |
| CN107161514A (en) * | 2017-06-28 | 2017-09-15 | 山东丽鹏股份有限公司 | Sealing metal container lid |
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| CN111038837A (en) | 2020-04-21 |
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