CN110921040B

CN110921040B - Double-layer blank and double-layer bottle made of same

Info

Publication number: CN110921040B
Application number: CN201811098976.1A
Authority: CN
Inventors: 戴宏全
Original assignee: Taiwan Hon Chuan Enterprise Co Ltd
Current assignee: Taiwan Hon Chuan Enterprise Co Ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2021-07-16
Anticipated expiration: 2038-09-20
Also published as: CN110921040A

Abstract

A double-layered blank and a double-layered bottle made therefrom, the double-layered blank comprising: an inner blank, which comprises a threaded opening part, an inner blank ring, an inner blank shoulder and an inner blank body; an outer embryo including an outer embryo ring, an outer embryo shoulder, and an outer embryo body; a plurality of ventilation grooves are arranged on the inner wall surface extending from the upper surface of the outer embryo ring to the outer embryo shoulder, and each ventilation groove forms an opening on the periphery of the outer embryo ring; the outer embryo is sleeved outside the inner embryo, and a ventilation space communicated with all the ventilation grooves is arranged between the inner embryo and the outer embryo; the double-layer bottle made of the double-layer blank is provided with an inner layer bottle and an outer layer bottle, an air pressure space and a plurality of air passages are arranged between the inner layer bottle and the outer layer bottle, and a plurality of air holes communicated with the air passages are arranged at the convex ring of the double-layer bottle.

Description

Double-layer blank and double-layer bottle made of same

Technical Field

The invention relates to a double-layer bottle blank and a double-layer bottle made of polyethylene terephthalate (PET for short).

Background

It is known that liquid articles such as beverages, seasonings, and medicines are mostly filled in plastic packaging containers, which are low in packaging cost and convenient to take out, but air enters into the remaining space inside the packaging container when the liquid articles are taken out and poured, so that the contents are easily deteriorated, and the influence on the liquid articles which are not consumed at one time is large.

CN206187550U "double-layer plastic bottle for preventing air from mixing into the liquid in the bottle" proposes a solution to the above problems. The plastic bottle consists of an inner layer and an outer layer, and is provided with a bottle cap which is connected in a matching way. The bottle bottom of the inner layer is connected with the bottle bottom of the outer layer; the bottle wall part of the inner layer is connected with the bottle wall part of the outer layer. The mouth of the outer layer is provided with a vent hole penetrating through the wall of the outer layer bottle at the position where the two layers are not connected, and the thread or the embedded thread is provided with a vent groove which is communicated with the vent hole. When the outer cover is opened to pour out liquid, the bottle wall is forcibly squeezed by hands, the inner bottle wall and the outer bottle wall shrink simultaneously, and the liquid slowly flows out from the inner bottle through the solution outlet; when hands are loosened, liquid stops flowing, the inner bottle wall keeps a contracted state, meanwhile, outside air enters an air space between the two bottle walls through the air groove and the vent hole, the inner bottle wall keeps a contracted state, and the outer bottle wall expands to be restored.

TW201801995 "multilayer bottle made of synthetic resin" indicates that there is a problem that the double layer plastic bottle having the above technical features cannot sufficiently discharge the content and the remaining liquid becomes much, and proposes a solution in which a housing bottle is provided with an outer mouth portion, a shoulder portion, a trunk portion, a bottom portion, and a ground portion, and is restored to its original shape with respect to external pressure, and a portion of the shoulder portion which is connected to at least the outer mouth portion is formed in a polygonal pyramid shape, the trunk portion is circular in cross section, and the bottom portion is formed in a polygonal pyramid shape and has a ridge line connected to an extension line of the polygonal pyramid-shaped ridge line of the shoulder portion. The inner container body is provided with a cylindrical inner mouth part arranged on the inner peripheral side of the outer mouth part and an inner container body with a shape along the inner surface shape of the outer shell bottle; an air passage is arranged between the outer mouth part and the inner mouth part.

The above-mentioned prior art double bottle has the following problems:

the air channel is arranged at the thread of the bottle mouth, so that the thread of the bottle mouth needs to change position or design and can not be matched with the existing threaded bottle cap. The air channel is arranged at the bottle mouth and is easily blocked by extruded contents, so that the air inlet and the air exhaust are not smooth, and the problem that the content of the inner-layer bottle is not easily extruded or the content allowance which cannot be extruded is increased is further derived.

Disclosure of Invention

The present invention aims at providing a double-layer blank and a double-layer bottle made of the double-layer blank, so as to solve the problems of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a bilayer embryo comprising:

an inner blank, which sequentially comprises a threaded opening part, an inner blank ring, an inner blank shoulder and an inner blank body from top to bottom;

an outer embryo which sequentially comprises an outer embryo ring, an outer embryo shoulder and an outer embryo body from top to bottom; a plurality of ventilation grooves are arranged on the inner wall surface extending from the upper surface of the outer embryo ring to the outer embryo shoulder, and each ventilation groove forms an opening on the periphery of the outer embryo ring;

the outer blank is sleeved outside the inner blank, the outer blank rings are arranged below the inner blank rings and are in contact with each other, the outer blank shoulders correspondingly accommodate the inner blank shoulders, the outer blank body correspondingly accommodates the inner blank body, the wall thickness of the outer blank body is larger than that of the inner blank body, and the longitudinal length of the outer blank body is larger than that of the inner blank body; a ventilation space communicated with all the ventilation grooves is arranged between the inner embryo and the outer embryo.

Preferably, a plurality of outer wall convex parts are arranged at equal intervals outside the inner embryo shoulder, and when the outer embryo is sleeved outside the inner embryo, the outer wall convex parts contact the inner wall surface of the outer embryo; the inner wall of the shoulder of the outer embryo is provided with a plurality of inner wall convex parts at equal intervals, and when the outer embryo is sleeved outside the inner embryo, the inner wall convex parts contact the outer wall of the inner embryo.

Preferably, the ventilation groove is divided into a plurality of flat bottom grooves and a plurality of pointed bottom grooves according to the cross section shape; at least one pointed bottom groove is arranged between two adjacent flat bottom grooves.

Preferably, the flat-bottomed trench includes an opening portion and a groove bottom portion, and the width of the opening portion is the same as the width of the groove bottom portion.

Preferably, the pointed bottom groove comprises an opening part and a groove bottom part, the groove bottom part is pointed, and the width dimension of the opening part is larger than that of the groove bottom part.

Preferably, two side walls connecting the opening part and the groove bottom are concave-convex curved surfaces.

Preferably, the ventilation groove is a flat-bottom groove, and comprises an opening part and a groove bottom part, the width of the opening part is consistent with that of the groove bottom part, and a central angle formed by two sides of the ventilation groove is 1-60 degrees.

A double-layered bottle made of the double-layered blank, comprising:

an inner layer bottle is formed by blow molding of the inner blank shoulder and the inner blank body, an outer layer bottle is formed by blow molding of the outer blank shoulder and the outer blank body, and the wall thickness of the outer layer bottle is larger than that of the inner layer bottle; the ventilation space of the double-layer blank forms an air pressure space between the inner-layer bottle and the outer-layer bottle; the ventilation groove of the double-layer blank becomes an air passage with the double-layer bottle; the air passage is communicated with the air pressure space; the threaded opening part of the inner blank becomes a threaded bottle opening of the double-layer bottle; the bottom surface of the inner blank ring and the top surface of the outer blank ring are in spot welding to form a convex ring of the double-layer bottle due to blow molding, the opening of the outer blank forms an air vent which is communicated outwards on the convex ring, and the air vent is communicated with the air passage.

The invention has the beneficial effects that:

the present invention differs from the prior art described above in the location of the vent grooves, and the prior art vent grooves or vents are located in the threaded finish, but the present invention eliminates such a design. The vent groove extends from the upper surface of the outer embryo ring to the inner wall surface of the outer embryo shoulder, and is positioned on the convex ring and the bottle shoulder of the double-layer bottle after the inner embryo and the outer embryo are blown into the double-layer bottle, the vent groove forms a plurality of vent holes which are communicated outwards on the convex ring, and the vent groove is communicated with a vent space between the inner layer bottle and the outer layer bottle. When the double-layer bottle is squeezed, air in the ventilation space enters and exits through the air vent of the spacer ring, and the air vent and the ventilation groove are far away from the threaded bottle mouth and the bottle cap, so that the problem that the air vent and the ventilation groove are blocked by contents released from the bottle cap mouth or overflowing to the threaded bottle mouth is solved.

The ventilation grooves have specific shapes and are arranged in a large number along the circumference of the double-layer bottle or the double-layer blank, so that even if a few ventilation grooves are sealed due to welding when the double-layer bottle is formed or the few ventilation grooves are blocked due to overflowing of contents when the double-layer bottle is used, the ventilation grooves still ensure that most of the ventilation grooves are smooth inside and outside, and the smoothness of air inlet and exhaust is ensured.

The invention ensures the smoothness of air inlet and air exhaust of the double-layer bottle, the outer-layer bottle rapidly expands and returns to the original shape due to the air pressure of the ventilation space, the inner-layer bottle is continuously compressed due to the air pressure of the ventilation space, and the air pressure of the ventilation space can be ensured to act on the inner-layer bottle by each action of extruding the outer-layer bottle, so that the inner-layer bottle is gradually extruded to the limit, the content is fully released, and the residual quantity which cannot be extruded is reduced.

The double-layer blank and the double-layer bottle do not change the shape and the structure of the threaded bottle mouth, so the double-layer blank and the double-layer bottle can be matched with the known threaded bottle cap.

Drawings

FIG. 1 is a front view of a first embodiment of a bilayer blank of the present invention.

FIG. 2 is a front view of a second embodiment of a bilayer blank of the present invention.

FIG. 3 is a front view of an inner embryo according to the present invention.

Fig. 4 is a sectional view taken along line III-III in fig. 3.

FIG. 5 is a perspective view of a first embodiment of the outer blank of the present invention.

FIG. 6 is a front view of a first embodiment of an outer blank of the present invention.

Fig. 7 is a section VII-VII of fig. 6.

Fig. 8 is a section VIII-VIII of fig. 6.

Fig. 9 is an enlarged view of circle a in fig. 8.

Fig. 10 is an enlarged view of circle B in fig. 8.

FIG. 11 is a cross-sectional view XI-XI of FIG. 1.

Fig. 12 is a sectional view of XII-XII in fig. 1.

Fig. 13 is a cross-sectional view of the double-layered bottle blown from the double-layered blank 1 of fig. 1.

FIG. 14 is a perspective view of a second embodiment of the outer blank of the present invention.

FIG. 15 is a front view of a second embodiment of an outer blank of the invention.

Fig. 16 is a cross-section XVI-XVI of fig. 15.

Fig. 17 is a cross-sectional view of XVII-XVII of fig. 2.

Fig. 18 is a cross-sectional view of XVIII-XVIII of fig. 2.

FIG. 19 is a cross-sectional view of the double-layered embryo blown double-layered bottle of FIG. 2.

Fig. 20 is a schematic sectional view of the combination of the double-layered bottle and the check bottle cap (closed) according to the present invention.

Fig. 21 is a sectional view of the double-layered bottle and the check cap according to the present invention.

FIG. 22 is a plan view showing the combination of the double-layered bottle and the check bottle cap according to the present invention.

FIG. 23 is a schematic view of the squeezing action of the double bottle of the present invention.

FIG. 24 is a schematic view of the double bottle recovery and squeezing volume reduction of the present invention.

FIG. 25 is a second schematic view of the double-layered bottle of the present invention for recovery and squeezing volume reduction.

Reference numerals: 1: double-layer embryos; 10: inner embryo; 11: a threaded mouth; 12: an inner embryonic ring; 13: an inner embryo shoulder; 14: an inner embryonic body; 15: an outer wall protrusion; 20: an outer embryo; 21: an outer embryonic ring; 22: an outer embryo shoulder; 23: an outer embryonic body; 24: a vent groove; 25: an opening; 26: a flat-bottomed groove; 261: an opening part; 262: the bottom of the tank; 27: a sharp-bottomed trench; 271: an opening part; 272: the bottom of the tank; 273: a concave-convex curved surface; 28: an inner wall protrusion; 29: a plenum space; 30: a double-layer bottle; 31: an inner bottle; 32: an outer layer bottle; 33: an air pressure space; 34: an airway; 35: a threaded bottle mouth; 36: a convex ring; 37: a vent; 40: an outer embryo; 41: an outer embryonic ring; 42: an outer embryo shoulder; 43: an outer embryonic body; 44: a vent groove; 441: an opening part; 442: the bottom of the tank; 443: an opening; θ: a central angle; 50: a double-layer bottle; 51: an inner bottle; 52: an outer layer bottle; 53: an air pressure space; 54: an airway; 55: a threaded bottle mouth; 56: a convex ring; 57: a vent; 60: non-return bottle caps/caps; 61: a valve plate; 62: and an injection outlet.

Detailed Description

Referring to fig. 1 and 2, a double-layered blank 1 includes an inner blank 10 and an outer blank, both of which are made of polyethylene terephthalate (PET), and the outer blank is sleeved outside the inner blank 10.

Referring to fig. 3 and 4, the inner blank 10 includes, from top to bottom, a threaded opening 11, an inner blank ring 12, an inner blank shoulder 13, and an inner blank body 14. A plurality of outer wall convex parts 15 are arranged at equal intervals at the positions close to the inner embryo ring 12 outside the inner embryo shoulder 13.

Referring to fig. 5 and 6, the outer blank 20 of the first embodiment comprises, in order from top to bottom, an outer blank ring 21, an outer blank shoulder 22, and an outer blank body 23.

As shown in fig. 5, 6 and 7, the inner wall surface extending from the upper surface of the outer blank ring 21 to the outer blank shoulder 22 is provided with vent grooves 24, and each vent groove 24 forms an opening 25 around the outer blank ring 21; the cross-sectional shape of the vent grooves 24 is as shown in fig. 8, 9, 10, and includes flat-bottomed grooves 26 and sharp-bottomed grooves 27. At least one or two sharp-bottomed grooves 27 are provided between two adjacent flat-bottomed grooves 26. The opening 261 and the groove bottom 262 of the flat bottom groove 26 maintain a uniform width dimension. The sharp-bottomed groove 27 is formed such that the groove bottom 272 is sharp, the width of the opening 271 is larger than that of the groove bottom 272, and both side walls connecting the opening 271 and the groove bottom 272 are formed into concave-convex curved surfaces 273. As shown in fig. 7, a plurality of inner wall protrusions 28 are provided at equal intervals on the inner wall surface of the outer shoulder 22 at positions close to the outer ring 21.

Referring to fig. 1, 11 and 12, the outer blank 20 is sleeved outside the inner blank 10, the outer blank rings 21 are under the inner blank ring 12 and contact with each other, the outer blank shoulder 22 correspondingly accommodates the inner blank shoulder 13, and the outer blank body 23 correspondingly accommodates the inner blank body 14. The wall thickness of the outer blank body 23 is greater than that of the inner blank body 14, and the longitudinal length of the outer blank body 23 is greater than that of the inner blank body 14. The convex part 15 on the outer wall of the inner blank 10 contacts the inner wall surface of the outer blank 20, and the convex part 28 on the inner wall of the outer blank 20 contacts the outer wall surface of the inner blank 10. Between the inner blank 10 and the outer blank 20, there is a ventilation space 29 communicating with all the ventilation grooves 24.

As shown in fig. 13, the double-layered bottle 30 is manufactured by a known injection blow molding method or an injection stretch blow molding method, and the type of the inner and outer layer bottles 32 is changed according to the model without limitation. An inner bottle 31 is formed by blow molding of the inner blank shoulder 13 and the inner blank body 14, an outer bottle 32 is formed by blow molding of the outer blank shoulder 22 and the outer blank body 23, and the outer wall convex part 15 and the inner wall convex part 28 are in spot welding with each other when blow molding; the wall thickness of the outer layer bottle 32 is larger than that of the inner layer bottle 31; the ventilation space 29 of the double-layer blank 1 forms an air pressure space 33 between the inner layer bottle 31 and the outer layer bottle 32; the air channels 24 of the double-layer blank 1 become air channels 34 of the double-layer bottle 30; the air passage 34 is communicated with the air pressure space 33; the threaded opening 11 of the inner blank 10 becomes a threaded mouth 35 of the double-layered bottle 30; the bottom surface of the inner blank ring 12 and the top surface of the outer blank ring 21 are spot-welded by blow molding to form a protruding ring 36 of the double-layered bottle 30, the opening 25 of the outer blank 20 forms an outward communicating vent 37 on the protruding ring 36, and the vent 37 communicates with the air passage 34.

Referring to fig. 14, 15 and 16, the second embodiment of the outer blank 40 comprises, from top to bottom, an outer blank ring 41, an outer blank shoulder 42 and an outer blank body 43. A plurality of ventilation grooves 44 are formed on the inner wall surface extending from the upper surface of the outer blank ring 41 to the outer blank shoulder 42, the cross-sectional shape of the ventilation grooves 44 is a flat bottom groove as shown in FIG. 16, the width of the opening 441 and the groove bottom 442 are uniform, and the central angle θ formed by the both sides of the groove is 1 to 60 degrees. The vent groove 44 forms an opening 443 around the outer blank ring 41;

referring to fig. 17 and 18, the outer blank 40 is fitted over the inner blank 10, the outer blank rings 41 are under the inner blank ring 12 and contact each other, the outer blank shoulder 42 correspondingly receives the inner blank shoulder 13, and the outer blank body 43 correspondingly receives the inner blank body 14. The wall thickness of the outer blank body 43 is greater than that of the inner blank body 14, and the longitudinal length of the outer blank body 43 is greater than that of the inner blank body 14. A ventilation space is arranged between the inner blank 10 and the outer blank 40 and is communicated with all the ventilation grooves 44.

As shown in fig. 19, a double-layered bottle 50 is formed by a known injection blow molding method or an injection stretch blow molding method, and the type of the inner and outer layer bottles 52 is changed according to a mold without limitation. An inner bottle 51 is formed by blow molding of the inner blank shoulder 13 and the inner blank body 14, an outer bottle 52 is formed by blow molding of the outer blank shoulder 42 and the outer blank body 43, and the outer wall convex part 15 and the inner wall convex part are in spot welding with each other to form the outer bottle 52 and the inner bottle 51; the wall thickness of the outer layer bottle 52 is larger than that of the inner layer bottle 51; the ventilation space of the double-layer blank 1 forms an air pressure space 53 between the inner-layer bottle 51 and the outer-layer bottle 52; the air channels 44 of the double-layer blank 1 become air channels 54 of the double-layer bottle 50; the air passage 54 communicates with the air pressure space 53; the threaded opening 11 of the inner blank 10 becomes a threaded mouth 55 of the double-layered bottle 50; the bottom surface of the inner blank ring 12 and the top surface of the outer blank ring 41 are spot-welded by blow molding to form a protruding ring 56 of the double-layered bottle 50, the opening 443 of the outer blank 40 forms an outward communicating vent 57 on the protruding ring 56, and the vent 57 communicates with the air passage 54.

As shown in fig. 20 and 21, the double-layered

bottle

30, 50 is required to be combined with a bottle cap 60 having a non-return function, in which external air cannot enter the container through the bottle cap 60, but liquid in the container can be poured out through the bottle cap 60. The check bottle cap 60 matched with the double-

layer bottles

30 and 60 of the invention is not limited, and the check function can be realized. In the illustration, the check bottle cap 60 is provided with a movable valve plate 61, the double-layer bottle 30 and the double-layer bottle 60 are squeezed until the pressure in the bottle is larger than that outside the bottle, the valve plate 61 arches outwards to separate from the outlet 62 of the bottle cap 60, and the liquid in the bottle is poured out outwards through the bottle cap 60; on the contrary, when the double-layered

bottle

30, 60 is not squeezed, the pressure outside the bottle is greater than the pressure inside the bottle, and the valve plate 61 is pressed downward to seal the outlet 62.

Referring to fig. 22, the double-layered

bottle

30, 60 of the present invention contains contents in the inner-layered

bottle

31, 51, the contents being in a liquid state or a thick state, and the valve sheet 61 is closed.

As shown in fig. 23, when the check bottle cap 60 is opened, the body of the

outer layer bottle

32, 52 is squeezed by hand, the body of the inner layer and the body of the outer layer are squeezed simultaneously, and the content is poured out from the

inner layer bottle

31, 51 through the pouring outlet 62 and the bottle cap 60. At this time, a small amount of air existing in the

air pressure spaces

33, 53 between the

inner bottles

31, 51 and the

outer bottles

32, 52 is discharged from the

air passages

34, 54 and the air vents 37, 57 by being pressed.

As shown in fig. 24, when the hand is released, the liquid stops flowing, the valve plate 61 of the check cover is pressed to the outlet 62 by the external air pressure to close it, the external air enters the

air pressure spaces

33, 53 through the air vents 37, 57 and the

air ducts

34, 54, so that the walls of the

outer layer bottles

32, 52 are expanded to restore the original shape, and the air pressure existing in the

air pressure spaces

33, 53 keeps the

inner layer bottles

31, 51 in the state of volume reduction deformation due to squeezing. When the double-layered

bottles

30 and 50 are squeezed again next time, the squeezing force of the hands acts on the outer-layered

bottles

32 and 52, the air in the

air pressure spaces

33 and 53 is squeezed, and the squeezing force of the air acts on the inner-layered

bottles

32 and 52, so that the inner-layered

bottles

31 and 51 are squeezed again and volume is reduced, and the content is poured out again through the pouring outlet 62 and the bottle cap 60. By repeatedly squeezing or releasing the

outer layer bottles

32 and 52, the

inner layer bottles

31 and 51 are continuously squeezed to reduce the volume and do not return, so that the content in the

inner layer bottles

31 and 51 can be discharged to the outside to be nearly empty, as shown in fig. 25.

Claims

1. A bilayer blank, comprising:

the outer blank is sleeved outside the inner blank, the outer blank rings are arranged below the inner blank rings and are in contact with each other, the outer blank shoulders correspondingly accommodate the inner blank shoulders, the outer blank body correspondingly accommodates the inner blank body, the wall thickness of the outer blank body is larger than that of the inner blank body, and the longitudinal length of the outer blank body is larger than that of the inner blank body; a ventilation space communicated with all the ventilation grooves is arranged between the inner embryo and the outer embryo; a plurality of outer wall convex parts are arranged at equal intervals outside the inner embryo shoulder, and when the outer embryo is sleeved outside the inner embryo, the outer wall convex parts contact the inner wall surface of the outer embryo; the inner wall surface of the outer embryo shoulder is provided with a plurality of inner wall convex parts at equal intervals, and when the outer embryo is sleeved outside the inner embryo, the inner wall convex parts contact the outer wall surface of the inner embryo.

2. The bilayer blank of claim 1, wherein the vent trenches are divided into a plurality of flat bottom trenches and a plurality of sharp bottom trenches in cross-sectional shape; at least one pointed bottom groove is arranged between two adjacent flat bottom grooves.

3. The bilayer blank of claim 2, wherein said flat bottom trench comprises an open portion and a slot bottom, said open portion and said slot bottom having a width dimension.

4. The double-layered blank according to claim 2, wherein said sharp-bottomed trench comprises an opening portion and a trench bottom portion, the trench bottom portion being sharp-shaped, the width dimension of said opening portion being larger than the width dimension of the trench bottom portion.

5. The double-layered blank according to claim 4, wherein both side walls connecting the opening portion and the groove bottom portion are concave-convex curved surfaces.

6. A double bottle made of the double blank of claim 1, comprising:

the outer wall convex part and the inner wall convex part are in spot-shaped welding with each other during blow molding; the wall thickness of the outer layer bottle is larger than that of the inner layer bottle; the ventilation space of the double-layer blank forms an air pressure space between the inner-layer bottle and the outer-layer bottle; the plurality of ventilation grooves of the double-layer blank become a plurality of air passages of the double-layer bottle; the air passage is communicated with the air pressure space; the threaded opening part of the inner blank becomes a threaded bottle opening of the double-layer bottle; the bottom surface of the inner blank ring and the top surface of the outer blank ring are in spot welding to form a convex ring of the double-layer bottle due to blow molding, the opening of the outer blank forms an air vent which is communicated outwards on the convex ring, and the air vent is communicated with the air passage.