CN2209648Y - Bottom structure for blown container - Google Patents

Abstract

The utility model discloses a bottom enhancing structure for a blown container, which is composed of radial big feet, fin parts, rib parts, a bottom center, etc. The utility model is radial outwards from the bottom center. The big feet support the weight of the container and each of the fin parts is between two feet. The big feet and the fin parts are arranged alternately in a ring shape. The rib parts are connected with the rear edges of the fin parts, smoothly extend relatively to the inner concaves of the big feet to become a container wall and are also provided alternately with the big feet in a ring shape. Besides enabling the container to stand smoothly, the bottom enhancing structure can bear the internal pressure of the container and the impact of external force to prevent the container from deforming and cracking.

Description

Bottom structure for blown container

The utility model relates to a kind of bottom construction of blow-molded container, relates to the additional strengthening with radial bottom of one-body molded blow-molded container specifically.

Because the plastic material production technology is flourishing day by day, frangible and the heavier shortcoming of glass container under the situation of considering safety, convenience, traffic cost and productive costs, is replaced by plastic bottle gradually in the past, especially on the packing of fizz, almost adopt plastic bottle fully.

Based on the maintenance to environment, it is human common problems that resource can heavily be covered the regeneration use.The utility model is to propose a kind of synthetic resin container, refers to that especially poly terephthalic acid diethyl fat is container of material.Elder generation's ejection formation is made the preform as the test tube shape, cooperates required doleiform, and the design suitable mold is multiple with thermoplastic preform (generally between 90 ℃～110 ℃), makes required container with the blowing extension method again.

The utility model main purpose, be to provide a kind of container of the radial bottom of the one-piece type blow-molded container tool of synthetic resin system additional strengthening of novelty, the container of the radial bottom of this tool additional strengthening, except that cup is auxiliary at the bottom of needn't other materials promptly stand reposefully, more can bear in the container bump of pressing (general pop bottle can reach 5kg/cm) and external force, to prevent the distortion of container body and to break.And the utility model is to finish with one-body molded blowing, can remove the shortcoming of separating the unlike material difficulty when existing container reclaims from, lowers the recycling degree of difficulty, reaches the easier advantage of heavily covering utilization of resource.

According to the substructure of a kind of blow-molded container of the present utility model, the tubular sidewall with one first diameter is connected to body mutually, it is characterized in that this substructure comprises:

A plurality of big foots radially extend downwards and inwardly from the body place, terminate in bottom centre, and a ball portion is formed on the bottom of this foot, and this ball portion constitutes a discontinuous bearing surface, and having than this first diameter is the second little diameter;

A plurality of flanks are between this big foot, from the body place downwards and with inwardly extension radially of the more significant mode of this big foot, terminate in bottom centre, one web portion is formed on the bottom of this flank, place between ball portion between this web portion, when making bearing surface that ball portion formed that container is supported on a horizontal surface, this web portion is above this horizontal surface, and this web portion constitutes a non-continuously circular, has three diameter little than this second diameter;

One bottom centre for slightly being the shape of sphere plano-convex, is to have big foot and web portion to become annulus to arrange so that bottom centre's point is alternate each other radially in its circumferential edges.

According to the substructure of blow-molded container of the present utility model, it is characterized in that this big foot comprises vola, toes and dual-side, it is an inclined-plane that these toes are connected in bottom centre, produces be full of cracks in order to avoid stress concentration, side then is connected to flank mutually.

According to the substructure of blow-molded container of the present utility model, it is characterized in that this web portion adopts the cambered surface design, in order to be connected flank and bottom centre, in order to the extension of flank, web portion, the formed continuous face of bottom centre.

Substructure according to blow-molded container of the present utility model, it is characterized in that this big foot and flank are alternate each other and around adjacency bottom centre, and big foot and flank are shape respect to one another to form a continuously smooth face that is formed by extensions such as big foot, bottom centre, web portion, flanks.

Substructure according to blow-molded container of the present utility model, it is characterized in that this big foot and flank are alternate each other and around adjacency bottom centre, and big foot and big foot toward each other and flank and flank toward each other, formation one reaches the rib Symmetrical Continuous smooth surface that is formed by extensions such as flank, web portion, bottom centre, web portion, flanks by the sufficient Symmetrical Continuous smooth surface that extensions such as big foot, bottom centre, big foot form.

Feature of the present utility model and advantage will be by making comparisons with the designed container of known technology and display especially, below conjunction with figs. described, and make the difference of the utility model and known technology can be clearer.

Fig. 1 is the section-drawing of a known vessel bottom.

Fig. 2 is the section-drawing of another known vessel bottom.

Fig. 3 is the lateral plan of the utility model embodiment (five foots) container.

Fig. 4 A is the backplan of Fig. 3, and Fig. 4 B and 4C are the lateral plan of Fig. 3 container bottom, sees it from the direction shown in Fig. 4 A respectively.

Fig. 5 is the section-drawing of 5-5 line among Fig. 4 A.

Fig. 6 is the backplan of another embodiment of the utility model (four-footed) container.

Fig. 7 is the section-drawing of 7-7 line among Fig. 6.

Fig. 8 is the section-drawing of 8-8 line among Fig. 6.

Fig. 9 is the backplan of another embodiment of the utility model (six foots) container.

Fig. 1 is the substructure of five sufficient containers of known integrally formed bottom indent, and its bottom 10 comprises the stand aerofoil 11 and the part 12 that concaves.When the carbonated carbonated drink of filling, the aerofoil 11 and the part 12 that concaves will cause container bottom to understand pressurized and outside outstanding shown in dotted line 13 because of bearing container internal pressure.Though aerofoil 11 is constituted with the form that polypody is stood, and the fold cambered surface of the sufficient shape generation of polypody, perhaps help the Reinforced container bottom construction and support body and stand, but in fact, even inner fovea part 12 is being done reinforcement more along sufficient face inboard, the inner fovea part 12 of Fig. 1 is pressed and evagination in bearing incessantly at last, and consequently container can't steadily be stood and easily be toppled over.In addition the bottom of evagination, it is in essence in the stressed inequality that is of each point, and container bottom be full of cracks and broken bottle easily to betide aforementioned extension bad, the more weak part of intensity.Above-mentioned substructure is unfavorable for the container of pressing in high as containing, and only is suitable for the general doleiform of pressing in low or not pressing in the tool of filling, for example as juice bottle, mineral water bottle, soy cruet, castor etc.

Fig. 2 is the substructure of the one forming containers of another kind of known bottom centre plano-concave, its bottom 20 comprises foot 21, the aerofoil 22 of standing, rib 23 and indent bottom centre 24, when the carbonated carbonated drink of this vessel filling, the bottom centre of its sufficient face in bottom, rib and indent etc. can bear interior pressure everywhere and outwards depart from protrusion, shown in dotted line 25.Its sufficient face floor space of this kind substructure reduces (diameter that is the area of a circle that each sufficient tripartite confrontation forms diminishes former), and the distance of the indent bottom centre 24 and the aerofoil 22 of standing also shortens, lowered the stability that container is stood when filling contains the pressure content, very easily when transporting, load-transfer device topples over, even when leaving standstill, also often can't stand for the bump of slight external force.Another unfavorable factor is behind the container filling carbon dioxide pop bottle of Fig. 1 and Fig. 2 as described above, places under the hot and humid degree environment, because that bottle bottom blow molding is extended is bad, and be full of cracks at the bottom of very easily causing bottle.Especially with the Taiwan located in subtropical zone, its in summer temperature usually up to more than 35 ℃ and relative humidity also surpass 80% for very.In view of this, general canned in the carbonated drink of plastic bottle, need to deposit 12 weeks or 35 ℃ and deposit the check of getting off of 4 all conditions in 22 ℃, require the infiltration capacity of the interior gas of container never can be higher than 15%.Therefore not only easily be full of cracks of the bottom 26 of known vessel as shown in Figure 2, and if long-term storage chaps under hot and humid degree environment and will enlarge gradually, gas permeation speed is then accelerated, and certainly will can't reach product standard.What is more, crack performance after continue worsening, be full of cracks at the bottom of promptly can causing bottle, its content will overflow and have influence on the product that other store together.

The plastic bottle that twin shaft of the present utility model extends, be to make improvements at bottom construction as the known technology of Fig. 1 and Fig. 2, attempt solves integrally formed container filling soda, and because of interior pressure reaches the following crack performance that is produced of hot and humid degree environment greatly, existing still conjunction with figs. is described as follows:

Shown in Fig. 3 lateral plan, embodiment of the present utility model is the doleiform of a suitable filling soda, this doleiform can be divided into bottleneck 29, body 30 and bottom 31 3 parts, bottleneck 29 is a screw type, cooperates the thread bottle cap, can guarantee that content does not leak outside in the container, bottleneck is following to be body part 30, and this body is a cannulated body, extends downwards to connect the bottle ends 31 part.

The utility model bottle bottom construction 31 as shown in Figure 3, mainly by five hollows supporting this doleiform " big foot " 32, " flank " 34 and similar number " web portion " 35 and " bottom centre " 36 compositions, and with bottom centre's 36 outside merry-go-round arrangements radially.Promptly as shown in Figure 3, the outer wall of doleiform bottom construction is to take advantage of one's power upwards and bottom doleiform to be dome, and the disc (approximate sphere) of dome top for omiting plano-convex is bottom centre shown in Figure 3 36.

Fig. 4 A is the backplan of Fig. 3, and the circumferential edges of its bottom centre 36 is to have the toes 38 of big foot 32 and web portion 35 to arrange in the form of a ring so that 36 of bottom centre are alternate each other radially.Big whole face is divided into toes 38, vola 37 and dual-side 39.Wherein vola 37 is stand in order to supporting, and trailing edge is tilted to level and smooth extension and is the ankle 33 of upside-down triangle shape approximately, and toes 38 leading edges then are connected to bottom centre's 36 circumferential edges.Please note, though vola 37 is the quadrangle of four jiaos of slynesses as shown in the figure, but also can be various suitable shapes such as trapezoidal, circle, and vola 37 relation because of mould before blow molding not may have the arm of angle, and after blow molding, make the angle of this arm of angle be slick and sly shape.The web face of web portion 35 is flat and lack, and joins with the gesture and the big sufficient dual-side 39 of plano-concave between two big foots, and its web portion 35 leading edges also are connected to bottom centre's circumferential edges.34 trailing edges that are connected web portion 35 of flank, also become circular each other alternately with big foot, and with join parallel of gesture with dual-side with respect to big sufficient side 39,39 past indents, its finned surface is arcuation except that rising from web portion trailing edge, its gesture that smoothly is tilted to extends and becomes body 30, and flank 34 also becomes circular arrangement each other alternately with big foot.

As previously mentioned, by means of the toes 38 of the big foot 32 that doleiform bottom construction 31 of the present utility model provided and the cooperation of web portion 35 and bottom centre 36 etc., can make the bottom construction 31 of doleiform of the present utility model more can bear interior pressure, and prevent that container bottom from producing the stress fracture phenomenon because of failing fully to extend.

Fig. 4 B and Fig. 4 C are the lateral plan of Fig. 3 container bottom, see it from the direction shown in Fig. 4 A respectively.As shown in the figure, flank 34 is between big foot 32 as can be known, and container is supported by the plane that the vola 37 of big foot 32 is formed.34 of flanks are adjacent to web portion 35 downwards, and this web portion 35 then extends to bottom centre 36 again, form a projection between bottom centre 36 and vola 37, and alternately with vola 38 radially become circular arrangement.

The utility model more can bear interior pressure in order to make container, flank 34 and web portion 35 both in design with between big foots, the width of flank face and web portion face needs to amplify as far as possible.Through analysis of experiments, be example as if soda with two liters of containers, its width 8m/m to 15m/m is for the most suitable.

Be illustrated in figure 5 as the 5-5 cross-section cutaway view of Fig. 4 A, can clearer characteristics of the present utility model, wherein whole bottom 5-5 section is to be constituted, and up extended to wall of container 31 again by ankle 33, vola 37, toes 38, bottom centre 36, web portion 35, flank 34 equal section lines.According to the previous test of many times of the utility model, above-mentioned by 33,37,38,36,35,34, the 31 level and smooth serial sections that constitute, promptly shown in solid line 40, be to be successional resistance to compression face, wherein bottom centre 36 " point " is good from the stand vertical distance on plane, place of big foot with 3m/m to 6m/m.And on the 5-5 section, bottom centre 36 adopts the inclined-plane but not cambered surface with the joint face of toes 38, be to consider when known technology is adopted the cambered surface design, after pressing in the generation of container filling gas, it is bad easily to produce extension, and wall of container has the phenomenon of the thick accumulation of meat, yet adopts inclined design can avoid it.Adopt the cambered surface design as for web portion 35, be for increasing the total body surface area of section, and to be connected flank 34 and bottom centre 36, can more help the abundant extension of each continuous face in position such as 34,35,36, review known technology and then exist, very easily extend bad naturally with a flank cambered surface.The design of above section can prevent that especially the position " bottom centre " at cast gate (penetrating the material mouth of the preform) place of container test tube shape body from producing the stress rupture phenomenon because of failing fully to extend.

Another characteristics of the utility model are promptly shown in Fig. 5 solid line 40, container is after the filling carbon dioxide, though being stressed outwards to expand, changes the bottle end as dotted line 41, but when container bottom slightly outwards expands, can not influence the area of container bottom in order to stand, be that vola 37 is affixed on outside the standing surface, the toes 38 and the interplanar of standing also have enough gap formation aerofoils to stand in order to pulsation-free.More easily stand though container bottom is more flat, in fact the plastic bottle of blow molding is behind filling gas, and thin container wall energy is evagination and be smooth and stood not, is extremely to be difficult for, it would be better to the aerofoil that forms several in the bottom or be sufficient shape, but the reality that the also resistance to compression of both can having stood comes.Therefore container of the present utility model can transport Shi Buhui and topples on load-transfer device, also can steadily stand when placing goods carrier, meets the requirement in the practicality.

As shown in Figure 6, the mode that the utility model can also four-footed disposes.Its bottom centre 36 ' circumferential edges be that toes 38 ' and web portion 35 ' arrange in the form of a ring with bottom centre 36 ' alternate is each other radially arranged.Big whole face be divided into toes 38 ', vola 37 ' and dual-side 39 '.Wherein vola 37 ' be is stood in order to supporting, and trailing edge and being tilted to smoothly be extended in the ankle 33 that is upside-down triangle shape approximately ', toes 38 ' leading edge then is connected to bottom centre's 36 ' circumferential edges.Please note, though vola 37 ' be the quadrangle of four jiaos of slynesses as shown in the figure, but also can be various suitable shapes such as trapezoidal, circle, the relation of and vola 37 ' because of mould before blow molding not may have the arm of angle, and makes the angle of this arm of angle be slick and sly shape after blow molding.Web portion 35 ' the web face flat and lack, and with gesture and the big sufficient dual-side 39 ' join of plano-concave between two big foots, its web portion 35 ' leading edge also is connected to bottom centre's circumferential edges.Flank 34 ' then be connected web portion 35 ' trailing edge, also become circular each other alternately with big foot, and with respect to big sufficient side 39 ', 39 ' toward join parallel of gesture of indent with dual-side, its finned surface is arcuation becomes body 30 except that the gesture that plays its level and smooth inclination from web portion trailing edge extends, and flank 34 ' also become circular arrangement each other alternately with big foot.

Figure 7 shows that the 7-7 cross-section cutaway view of Fig. 6, wherein characteristics that therefrom can clearer second embodiment of the present utility model, wherein whole bottom 7-7 section be by ankle 33 ', vola 37 ', toes 38 ', bottom centre 36 ', toes 38 ', vola 37 ', ankle 33 ' equal section line constitutes, and up extend to wall of container 31 again '.According to the previous test of many times of the utility model, above-mentioned by 33 ', 37 ', 38 ', 36 ', 38 ', 37 ', the 33 ' level and smooth serial section that constitutes, promptly shown in solid line 42, be called the resistance to compression face of sufficient Symmetrical Continuous.Figure 8 shows that the 8-8 section cross section view of Fig. 6, therefrom can more know the characteristics of the utility model second embodiment, wherein whole bottom 8-8 section be by flank 34 ', web portion 35 ', bottom centre 36 ', web portion 35 ', flank 34 ' etc. another cross hatch constitute, and up extend to wall of container 31 again '.According to the previous test of many times of the utility model, above-mentioned by 34 ', 35 ', 36 ', 35 ', the 34 ' level and smooth serial section that constitutes, promptly shown in solid line 44, the resistance to compression face that is called the rib Symmetrical Continuous, wherein bottom centre 36 ' " point " is the best from the stand vertical distance on plane, place of big foot with 3m/m to 6m/m.And on the 7-7 section, bottom centre 36 ' with toes 38 ' joint face adopt the inclined-plane but not cambered surface, be when considering the design of known technology cambered surface, after pressing in the generation of container filling gas, it is bad easily to produce extension, and wall of container has the phenomenon of the thick accumulation of meat, yet adopts inclined design can avoid it.As for 8-8 section web portion 35 ' adopt cambered surface design, be for increasing the total body surface area of section, and be connected flank 34 ' and bottom centre 36 ', can be more conducive to 34 ', 35 ', 36 ' etc. the abundant extension of each continuous face in position, review known technology and then exist, very easily extend bad naturally with a flank cambered surface.The design of above 7-7 and 8-8 section can prevent that especially the cast gate (penetrating the material mouth of preform) position " bottom centre " of container test tube shape body from producing the stress fracture phenomenon because of failing fully to extend.

The utility model can also six foots the kenel configuration, as shown in Figure 9, the resistance to compression smooth surface of its formation and four-footed kenel as shown in Figure 6 are similar, also can form the resistance to compression face of sufficient Symmetrical Continuous and the resistance to compression face of rib Symmetrical Continuous, its characteristics can be learnt by the explanation of Fig. 6 to 8, not give unnecessary details in this.

Still has common characteristic among the utility model embodiment, promptly when container after the filling carbon dioxide, change though can outwards expand during the pressurized of doleiform bottom, as Fig. 5 solid line 40 to dotted line 41, Fig. 7 solid line 42 is to dotted line 43, Fig. 8 solid line 44 is to shown in dotted line 45 grades, but container bottom but can not influence the area of container bottom in order to stand when slightly outwards expanding.Be among the embodiment, each vola can be affixed on outside the standing surface, and each toes and the place interplanar of standing also have the formation of enough gaps to support to stand in order to pulsation-free.

The required the utility model that is appreciated that is not limited to certain structure and method described above.Different modifications or improvement all can be finished under as back spirit of claims and scope not breaking away from the utility model.

Claims (5)

1, a kind of substructure of blow-molded container, the tubular sidewall with one first diameter is connected to body mutually, it is characterized in that this substructure comprises:

A plurality of big foots radially extend downwards and inwardly from the body place, terminate in bottom centre, and a ball portion is formed on the bottom of this big foot, and this ball portion constitutes a discontinuous bearing surface, and having than this first diameter is the second little diameter;

A plurality of flanks are between this big foot, from the body place downwards and with inwardly extension radially of the more significant mode of this big foot, terminate in bottom centre, one web portion is formed on the bottom of this flank, place between ball portion between this web portion, when making bearing surface that ball portion formed that container is supported on a horizontal surface, this web portion is above this horizontal surface, and this web portion constitutes a non-continuously circular, has three diameter little than this second diameter;

One bottom centre for slightly being the shape of sphere plano-convex, is to have big foot and web portion to become annulus to arrange so that bottom centre's point is alternate each other radially in its circumferential edges.

2, the substructure of blow-molded container as claimed in claim 1 is characterized in that this big foot comprises vola, toes and dual-side, and it is an inclined-plane that these toes are connected in bottom centre, produces be full of cracks in order to avoid stress concentration, and side then is connected to flank mutually.

3, the substructure of blow-molded container as claimed in claim 1 is characterized in that this web portion adopts the cambered surface design, in order to be connected flank and bottom centre, in order to the extension of flank, web portion, the formed continuous face of bottom centre.

4, the substructure of blow-molded container as claimed in claim 1, it is characterized in that this big foot and flank are alternate each other and around adjacency bottom centre, and big foot and flank are toward each other shape to form a continuously smooth face that is formed by extensions such as big foot, bottom centre, web portion, flanks.

5, the substructure of blow-molded container as claimed in claim 1, it is characterized in that this big foot and flank are alternate each other and around adjacency bottom centre, and big foot and big foot toward each other and flank and flank toward each other, formation one reaches the rib Symmetrical Continuous smooth surface that is formed by extensions such as flank, web portion, bottom centre, web portion, flanks by the sufficient Symmetrical Continuous smooth surface that extensions such as big foot, bottom centre, big foot form.

Images