CN115231124A

CN115231124A - Anti-backflow sealing bottle cap

Info

Publication number: CN115231124A
Application number: CN202110435164.7A
Authority: CN
Inventors: 王贤淮
Original assignee: Guangdong Longxing Packaging Industrial Co ltd
Current assignee: Guangdong Longxing Packaging Industrial Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-10-25

Abstract

The invention relates to a packaging bottle cap, in particular to a backflow-preventing sealing bottle cap which comprises an upper cover, a lower cover, an inner cover and a ball, wherein the upper cover and the lower cover are in a dotted connection type, the inner cover is of an integrally formed structure, the upper part of the inner cover is connected with the upper cover, the middle part of the inner cover is connected with the lower cover, the lower part of the inner cover is connected with a bottle opening, the inner cover is hollow, a cavity is formed in the inner cover, the cavity is connected with the inner wall of the inner cover through a separation piece, the upper surface of the cavity is closed, the side surface of the cavity is hollow, the ball is placed in the cavity, a limiting block is arranged below the inner part of the cavity, the limiting block is in a conical surface, and the diameter of the conical surface is smaller than that of the ball so that the ball can be supported and cannot fall out. Compared with the prior art, the bottle cap realizes the limitation of the liquid outflow speed and has better backflow prevention effect by changing the design, the sealing performance is better than that of the existing bottle cap on the market, the component parts of the bottle cap are reduced, the whole 4-6 external members are changed into 3 part combinations, the use of different materials is reduced, the production cost is saved, and the material recovery is more facilitated.

Description

Anti-backflow sealing bottle cap

Technical Field

The invention relates to a packaging bottle cap, in particular to a backflow-preventing sealing bottle cap.

Background

The existing bottle mouth design is fixed, the bottle mouth is provided with a clamping block and a plurality of raised lines, the existing bottle cap is upgraded aiming at the existing soy sauce glass bottle mouth and the existing bottle cap on the market, the anti-backflow function of the existing bottle cap is poor, and the slow operation can still realize the backflow. Due to different processes, the existing bottle cap is complex in design, the bottle cap is composed of a plurality of external parts, at least 4-6 external parts are embedded, and due to the fact that the external parts are combined by materials with different hardness and elasticity, the existing sauce cap in the market is composed of three different materials of PP \ PS \ LLDPE. Multiple components and materials are not only cumbersome to manufacture and assemble, but also not recyclable. Improvements to existing closures are made for the purpose of upgrading and sustainable development of assembled closures.

Disclosure of Invention

The invention aims to provide a backflow-preventing sealing bottle cap, and solves the problems that the existing bottle cap is not ideal in backflow-preventing function, complicated in manufacturing and assembling and not beneficial to recycling.

In order to realize the purpose, the following technical scheme is adopted: the utility model provides a prevent sealed bottle lid that flows backward, which comprises an upper cover, the lower cover, inner cup and ball, the upper cover adopts the punctiform connected mode with the lower cover, first unscrewing destroys the punctiform of upper cover and lower cover promptly and is connected, the inner cup is the integrated into one piece structure, inner cup upper portion is connected with the upper cover, the intermediate part is connected with the lower cover, the lower part is connected with the bottleneck, inner cup cavity, there is the cavity inside, the cavity is connected with the spacer for the inner wall of inner cup, seal above the cavity, the side fretwork is the liquid outlet, the ball is placed inside the cavity, there is the stopper below the cavity is inside, the stopper is the conical surface, the diameter that the conical surface diameter is less than the ball can support the ball and do not fall out.

The inner cover with the backflow prevention function on the market is generally combined by three pieces, and beads or piston pieces are assembled into a whole after the upper cover and the lower cover are separated. The inner cover is of an integrally formed structure, and the ball is arranged in a way that the inner cover is plugged when the inner cover has large elasticity in an uncooled or hot state. The upper cover is opened for the first time, the point connection of the upper cover and the lower cover is broken, the inner cover is integrally formed, when the bottle mouth is downward, due to gravity, the ball leaves the limiting block of the inner cover, and liquid enters the cavity in the inner cover and flows out from the opening of the side wall of the cavity. When the bottle mouth is upward, the ball drops down and is tightly attached along the conical surface of the limiting block due to gravity, so that the circulation between the cavity and the inside of the bottle is isolated, and the purpose of preventing backflow is achieved.

Furthermore, a double-layer sealing ring is arranged in the upper cover, the conical surface of the inner ring extrudes the wall surface of the liquid outlet of the inner cover, the uninterrupted trapezoidal threads on the inner wall of the outer ring are rotatably connected with the uninterrupted trapezoidal threads on the upper part of the inner cover, and the gap between the outer wall of the outer ring and the inner wall of the upper cover is smaller than 1.5mm. The upper cover and the lower cover are in a point connection type, and the connection between the upper cover and the lower cover is broken after the upper cover and the lower cover are unscrewed for the first time. The structure of inside and outside two rings of sealing washer and incessant trapezoidal thread play double-deck sealed effect, because the bottle lid material is constituteed and is changed, and the hardness changes, changes incessant trapezoidal thread more firmly durable.

Furthermore, the inner cup middle part radial positioning ring and upper and lower limit bayonet ring, the lower cover inner wall has annular protruding edge and spacing ring, the inner cup radial positioning ring external diameter each other matches with the internal diameter on the lower cover annular protruding edge, there is trapezoidal lug above the upper and lower limit bayonet ring of inner cup, there is corresponding trapezoidal lug below the lower cover annular protruding edge, there is the recess between the inner cup radial positioning ring and the lower cover upper and lower limit bayonet ring two-layer, trapezoidal lug on the upper and lower limit bayonet ring of inner cup blocks each other in the recess with the trapezoidal lug below the lower cover annular protruding edge, inner cup and lower cover are restricted from rotating each other, the lower cover limiting ring withstands the upper and lower limit bayonet ring of inner cup, limit the upper and lower displacement of inner cup, the outer wall of the lower part of inner cup has protruding sealing line and interference fit. The upper cover and the lower cover are connected together during demoulding, the inner cover is rotationally arranged between the upper cover and the lower cover, the bottle cap is completely assembled and sleeved on the bottle opening, the outer wall of the lower part of the inner cover is provided with three convex sealing grains, and the elasticity of LDPE, LLDPE and PP materials is utilized to form sealing with the interference fit of the bottle opening. The bottle mouth, the inner cover and the lower cover are mutually clamped, so that the mutual up-and-down and rotary displacement are limited, and the bottle mouth, the inner cover and the lower cover can be unscrewed in a rotary mode.

Furthermore, the inner wall of the lower cover is provided with an elastic sheet and a positioning rib, the elastic sheet is in a non-pressure state before the lower cover is sleeved into the bottle mouth, when the bottle mouth is sleeved, the elastic sheet is outwards opened under the extrusion of the upward acting force of the bottle mouth, when the lower cover is pressed in place, the elastic sheet is restored to the non-pressure state to support the clamping position of the bottle mouth, the positioning rib on the inner wall of the lower cover is mutually clamped with a plurality of convex strips of the bottle mouth to fix the lower cover and the bottle mouth and limit the rotation. The number of the elastic pieces is 2 or more than 2, and the elastic pieces are easier to assemble than a whole circle. When the lower cover is sleeved on the bottle mouth, the elastic sheet automatically opens outwards under the extrusion action of the crown part of the bottle mouth when the lower cover is sleeved on the bottle mouth. When the cover is pressed in place, the elastic sheet is positioned in the suspension empty position below the crown, and the elastic sheet automatically rebounds inwards to the original position when no external force is applied to press the cover, so that the function of preventing the cover from being opened is achieved. After the upper part of the cover is unscrewed, the lower part of the cover can still be buckled on the bottle mouth.

Furthermore, the upper cover, the lower cover and the ball are made of PP materials, and the inner cover is made of one of LDPE, LLDPE and PP materials. The existing sauce cap on the market is made of three different materials of PP \ PS \ LLDPE, so that the production process and parts are complicated, the properties of PS, PP and LLDPE are incompatible, and the material recovery is not facilitated. PP, LDPE and LLDPE are compatible, the material is easier to recycle, and the method is beneficial to environmental protection and sustainable development of packaging materials.

Compared with the prior art, the bottle cap realizes the limitation of the liquid outflow speed by changing the design, has better backflow prevention effect, has better sealing performance compared with the existing bottle cap, reduces the components of the bottle cap, changes 4-6 original kits into 3 parts, reduces the use of different materials, saves the production cost and is more favorable for material recovery.

Drawings

FIG. 1 is a cut-away view of a bottle cap of the present invention;

fig. 2 is a view showing the inner structure of the bottle cap according to the present invention;

FIG. 3 is a sectional view of the inner structure of the upper and lower covers;

FIG. 4 is a schematic view of the construction of the inner lid;

FIG. 5 is a top view of the inner lid;

fig. 6 is a sectional view of the inner structure of the inner cap.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-6, a backflow-preventing sealing bottle cap comprises an upper cap 1, a lower cap 2, an inner cap 3 and a ball 4, wherein the inner cap is of an integrally formed structure, the upper part of the inner cap 3 is connected with the upper cap 1, the middle part of the inner cap is connected with the lower cap 2, and the lower part of the inner cap is connected with a bottle mouth 5.

The upper cover 1 is provided with an inner sealing ring and an outer sealing ring, the inner sealing ring 11 and the outer sealing ring 12 are arranged, the inner sealing ring 11 is a conical surface, the inner wall of the outer sealing ring 12 is provided with uninterrupted trapezoidal threads 122, and the gap between the outer wall of the outer sealing ring 12 and the inner wall 13 of the upper cover is smaller than 1.5mm.

The inner wall of the lower cover 2 is provided with an annular convex edge 21, a limiting ring 22, a plurality of elastic sheets 23 and a plurality of positioning ridges 24.

The upper cover 1 and the lower cover 2 adopt a point-shaped connection type, and the point-shaped connection between the upper cover 1 and the lower cover 2 is broken after the upper cover 1 and the lower cover 2 are unscrewed for the first time.

Inner cup 3 is the integrated into one piece structure, and inner cup 3 cavity has cavity 31 inside, and cavity 31 is connected with inner cup inner wall 32 with

spacer

33, and 34 seals above the cavity, and side 35 fretwork is the liquid outlet, and inside cavity 31 was placed to ball 4, has stopper 36 below cavity 31 is inside, and the stopper is the conical surface, and the diameter that the conical surface diameter is less than the ball can support the ball and do not fall out. The upper part of the inner cover is provided with an uninterrupted trapezoidal thread 37, the middle part is provided with a radial positioning ring 38 and an upper and a lower limit bayonet rings 39, and the lower part is provided with three convex sealing lines 40.

Wherein, the conical surface of the inner ring 11 of the upper cover extrudes the inner cover liquid outlet wall 321, and the uninterrupted trapezoidal thread 122 of the outer ring 12 is rotationally connected with the uninterrupted trapezoidal thread 37 on the upper part of the inner cover. The double-layer connection achieves a better sealing effect.

The radial positioning ring 38 and the upper and lower limit bayonet rings 39 in the middle of the inner cap are connected with the annular convex edge 21 and the limit ring 22 of the lower cap in a matching way, the outer diameter 38 of the radial positioning ring of the inner cap 3 is matched with the inner diameter of the annular convex edge 21, trapezoidal lugs 391 are arranged on the upper and lower limit bayonet rings 39, corresponding trapezoidal lugs 211 are also arranged below the annular convex edge 21 of the lower cap 2, a groove is formed between the radial positioning ring 38 and the upper and lower limit bayonet rings 39 of the inner cap 3, the trapezoidal lugs 391 on the upper and lower limit bayonet rings 39 of the inner cap 3 and the trapezoidal lugs 211 below the annular convex edge 21 of the lower cap 2 are mutually clamped in the groove, so that the mutual rotation of the inner cap 3 and the lower cap 2 is limited, and the limit ring 22 of the lower cap 2 props against the upper and lower limit bayonet rings 39 to limit the up and down displacement of the inner cap 3 and the lower cap 2.

The upper cover 1 and the lower cover 2 are connected together when demoulding, the inner cover 3 is rotationally arranged between the upper cover 1 and the lower cover 2, the bottle cap is sleeved on the bottle mouth 5 after complete assembly, the lower cover 2 is sleeved in the bottle mouth 5, and when the bottle mouth is sleeved, the elastic sheet 23 automatically opens outwards under the extrusion action of the crown part 51 of the bottle mouth. When the cover is pressed in place, the elastic sheet 23 is positioned in the suspension empty position below the crown part 51, and the elastic sheet automatically rebounds inwards to the original position when no external force is applied, so that the function of preventing opening is achieved. After the upper cover on the upper part of the cover is unscrewed, the lower cover on the lower part of the cover can still be buckled on the bottle mouth. The positioning ridge 24 on the inner wall of the lower cover and the plurality of convex strips 52 on the bottle mouth are mutually clamped, so that the lower cover 2 and the bottle mouth 5 are fixed and the rotation is limited. The outer wall of the lower part of the inner cover 3 is provided with three raised sealing lines 40, and the elasticity of LDPE, LLDPE and PP materials is used for forming sealing in interference fit with the bottle mouth 5. The bottle mouth 5, the inner cover 3 and the lower cover 2 are mutually clamped, so that the mutual up-and-down and rotary displacement are limited, and the upper cover can rotate.

Comparative test

1. Flow rate measurement

The current soy sauce bottle cap on the market and the bottle cap of the invention are used for flow rate test comparison, two equivalent measuring cups are prepared, 800ml of soy sauce is filled in two bottles of different bottle caps, and the two measuring cups are poured at the same angle respectively, wherein the current flow rate of the current bottle cap and the flow rate of the bottle cap of the invention are almost the same.

2. Backflow prevention function test

Preparing two 50ml portions of soy sauce, slowly pouring the two portions of soy sauce back to the bottle cap of the invention and the existing soy sauce bottle cap on the market, pouring the soy sauce on the bottle cap of the invention, after 20 seconds, the soy sauce still stays on the cap and is not reduced, the soy sauce can not be poured back into the bottle, pouring the soy sauce on the existing soy sauce bottle cap, and after 43 seconds, the 50ml of soy sauce is poured back into the bottle.

In conclusion, the flow rate of the soy sauce bottle cap and the bottle cap of the invention poured out from the market is almost the same, and the anti-backflow performance of the existing bottle cap in the market is obviously inferior to that of the bottle cap of the invention. The invention can be used for soy sauce bottle caps, but not only can be used for soy sauce bottle caps, but also can be used as other liquid bottle caps.

Claims

1. The utility model provides a prevent sealed bottle lid that flows backward, a serial communication port, including the upper cover, the lower cover, inner cup and ball, the upper cover adopts the punctiform connected mode with the lower cover, the first punctiform of unscrewing destroying upper cover and lower cover promptly is connected, the inner cup is the integrated into one piece structure, inner cup upper portion is connected with the upper cover, the intermediate part is connected with the lower cover, the lower part is connected with the bottleneck, inner cup cavity, there is the cavity inside, the cavity is connected with the spacer for the inner cup inner wall, seal above the cavity, the side fretwork is the liquid outlet, the ball is placed inside the cavity, there is the stopper below the cavity is inside, the stopper is the conical surface, the diameter that the conical surface diameter is less than the ball can support the ball and does not fall out.

2. The sealing bottle cap of claim 1, wherein a double-layer sealing ring is provided in the upper cap, the inner cone surface extrudes the inner cap liquid outlet wall surface, the outer ring inner wall uninterrupted trapezoidal thread is rotatably connected with the inner cap upper part uninterrupted trapezoidal thread, and the gap between the outer ring outer wall and the upper cap inner wall is less than 1.5mm.

3. The sealing bottle cap according to claim 1, wherein the inner cap has a radial positioning ring and upper and lower limiting bayonet rings at a middle portion thereof, the lower cap has an annular convex edge and a limiting ring at an inner wall thereof, an outer diameter of the radial positioning ring of the inner cap is matched with an inner diameter of the annular convex edge of the lower cap, trapezoidal protrusions are provided on the upper and lower limiting bayonet rings of the inner cap, corresponding trapezoidal protrusions are provided under the annular convex edge of the lower cap, grooves are provided between the two layers of the radial positioning ring of the inner cap and the upper and lower limiting bayonet rings of the lower cap, the trapezoidal protrusions on the upper and lower limiting bayonet rings of the inner cap and the trapezoidal protrusions under the annular convex edge of the lower cap are engaged with each other in the grooves to limit mutual rotation of the inner cap and the lower cap, the lower limiting ring abuts against the upper and lower limiting bayonet rings of the inner cap to limit upward and downward displacement of the inner cap, and the outer wall of the lower portion of the inner cap has a raised sealing line to be interference-fitted with the bottle mouth.

4. The sealing bottle cap of claim 1, wherein the inner wall of the lower cap has an elastic piece and a positioning rib, the elastic piece is in a non-pressure state before the lower cap is inserted into the mouth of the bottle, when the lower cap is inserted into the mouth of the bottle, the elastic piece is pressed by the upward acting force of the mouth of the bottle to be expanded outwards, when the lower cap is pressed in place, the elastic piece is restored to the non-pressure state to support the clamping position of the mouth of the bottle, the positioning rib on the inner wall of the lower cap is clamped with the plurality of convex strips on the mouth of the bottle to fix the lower cap and the mouth of the bottle and limit rotation.

5. The sealed bottle cap of claim 4, wherein the resilient tab is 2-6 tabs.

6. The sealing cap of claim 1, wherein the upper cap, the lower cap and the ball are made of PP, and the inner cap is made of one of LDPE, LLDPE and PP.