CN1241961A - Process for obtaining blow molded plastic containers - Google Patents
Process for obtaining blow molded plastic containers Download PDFInfo
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- CN1241961A CN1241961A CN 97180822 CN97180822A CN1241961A CN 1241961 A CN1241961 A CN 1241961A CN 97180822 CN97180822 CN 97180822 CN 97180822 A CN97180822 A CN 97180822A CN 1241961 A CN1241961 A CN 1241961A
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Abstract
The present invention relates to a blow molded plastic container and a manufacturing method thereof. The container has a support element in the container cavity, the support element fully traverses the cavity and is integrated with the inner wall surface of the container main body at two separated positions to support the inner wall surface. The shape of the container is variable in stress centralizing area in order to reduce the stress function, thereby avoid the excessive distortion in the area.
Description
Background of invention
The present invention relates to plastic containers and manufacture method thereof, a kind of especially like this plastic containers, it can for example be installed in soda or analog at splendid attire fluid under the certain pressure.This plastic containers are normally made with prefabricated component, and described prefabricated component can utilize injection mo(u)lding or extrusion process to make, and then utilize a blow molding die with required shape described prefabricated component to be made the container of a suitable shape with blow moiding method.Thermoplastic commonly used is materials such as PETG (PET), TPO, but also can use other material.
The profile of described container generally includes that sidewall that shoulder that a neck, one extend from described neck, one extend from described shoulder or main part and one link to each other with described sidewall downwards downwards and from the described sidewall bottom of extension downwards, described neck has a device that is used for fixing lid.
Consider that from convenient and economic angle people need large-sized container usually, for example be widely used in two liters of PET bottles of splendid attire soda and be used for the bottle of splendid attire one gallons of milk.In fact, people also need the bigger container of size.But when utilizing such container splendid attire soda, described soda may lose a large amount of carbon dioxide that are dissolved in well in the beverage.When the volume of a container during consumable quantities of beverage, is repeatedly opened the situation that carbon dioxide will appear losing in described container greater than once opening.The loss of carbon dioxide is called as the end space loss, " end space " refers in the container the not volume of splendid attire beverage, the space that the carbon dioxide that may overflow from described beverage can enter, when repeatedly consuming beverage in same container, described end space can increase along with the minimizing of quantities of beverage in the container.
Owing to exist the loss of described end space, so the size of the bottle of splendid attire soda is limited in two liters usually, and three litre flasks of splendid attire soda are generally used under the very fast situation of beverage consumption, for example at people collective durante absentia.
In addition, in when falling the beverage, bigger container (for example 1.5 liters on splendid attire or more beverage) is difficult to grip for the little people of hand (particularly child), therefore need be than must with the hands catching more convenient being used to of bottle to carry, grip the device of described container.
By being set, whole inwall can solve the existing above-mentioned shortcoming of this class bottle in this bulk container.For bigger bottle, utilize such inwall can be divided into several chambers, thereby have such structure: once open a compartment so that once only consume beverage in the described compartment.Certainly, in order to consume beverage effectively step by step, described bottle must be equipped with a locking device that can open and close.Authorize in the U.S. Patent No. 5,232,108 of Y.Nakamura and disclosed the example that is separated into the container of several chambers about above-mentioned.
In order to improve the navigability of big bottle, as U.S. Patent No. 5,398, described in 828, can form one with the integrally formed reinforcing of described container handgrip part, promptly by inwall spare side engagement in recess place that forms described handgrip part and described chamber wall is turned up because of the internal pressure in the described container to prevent described recess.
Therefore, use whole inwall to have two purposes, one is that container is separated into several chambers again, and another is to prevent that the recess in the described container outer wall from turning up.
The object of the present invention is to provide a kind of not only economy but also bottle attractive in appearance, described bottle is to be made by PET or other plastic material with similar molded performance, such as materials such as Merlon, polystyrene, described bottle can have several compartments and/or the handgrip part as this bottle side-wall part, described handgrip part can deform with a kind of predetermined way under the effect of pressure of the inside of a bottle, if but when using this handgrip part, this handgrip part can not turn up.
In the past, for example U.S. Patent No. 5,232, described in 108, reach this purpose by a prefabricated component being set and in a cavity dimension and the final corresponding mould of container dimensional that will obtain described prefabricated component being carried out blow molding.The shortcoming of this method is, the container table of described blow molding reveals the mode of texturing that the internal pressure that produces owing to soda causes, and described container is because the restriction that inwall applies and can not be with similar geometric ways distortion.If described distortion is too big, so this filling beverage and bottle profile with certain pressure can not receive for the consumer who wants to obtain your drink.Have under the situation of above-mentioned handgrip part at a bottle, described handgrip part may be out of shape to such an extent that hinder its use.
When molded and shaped described container, can address the above problem basically by the rigidity that increases described container.If necessary, can achieve the above object by increasing thickness of container wall, but this can increase the plastic material amount of making container, thereby cost is improved.Under the situation of using crystalline plastics, for example PETG (PET), Merlon (PC) and nylon increase chamber wall thickness and can cause undesirable structural form.
Therefore, a basic goal of the present invention is, a kind of plastic containers that are used for the splendid attire pressurized contents and manufacture method thereof of blow molding are provided, particularly provide a kind of that be used for the splendid attire soda and have the plastic containers and a manufacture method thereof of on present employed container basis, carrying out improved profile and/or size.
Further purpose of the present invention is, provides a kind of and can not produce undesirable structural form and can too not improve container and the manufacture method thereof of making the required plastic material cost of container.
Another object of the present invention is to provide a kind of container and manufacture method thereof, if having a handgrip part in this container, so when at the described container of certain pressure retrofilling, for example during the filling soda, can keep the effectiveness of described handgrip part.
A further object of the present invention is to provide a kind of method of making container, and described container has the inside compartment that is produced by abutment wall, can guarantee the net shape of the described container be scheduled under certain internal pressure.
Other purpose of the present invention as can be seen from the following description and advantage.Summary of the invention
From the following description of this invention, can obtain above-mentioned purpose of the present invention and advantage.
The invention provides a kind of method of moulding that is used for the blow molding plastic containers of splendid attire fluid under pressure, described container has an inner member and an outer wall, described outer wall has an inner surface and an outer surface, described inner member links to each other with the inner surface of described outer wall at intersecting area, molded container shapes different with the container shapes of described splendid attire fluid under pressure, and molded container in case can be transformed into the shape of the container of above-mentioned splendid attire fluid under pressure after the pressurization in a predefined manner.
The present invention also provides a kind of method that is used for the blow molding plastic containers of splendid attire soda through improved manufacturing, this method comprises: the container precursor that first blow molding is set, described precursor comprises an outer wall and an inner member, described outer wall has inner surface and outer surface, and described inner member links to each other with the inner surface of described outer wall; Determine described precursor stress one emergent property and and then determine the shape of described precursor under the pressurized effect; Under pressure, can be out of shape the similar container precursor shape that becomes the container of described splendid attire fluid under pressure required form according to described characteristic and definite calculating; Prepare described similar precursor; And described similar precursor applied certain internal pressure to produce second container with reservation shape.
Container of the present invention has many advantages.Described container is the blow molding plastic containers with compartment, described container has at least one inwall, described inwall also can comprise the handgrip part that has supporting, when described container during at certain pressure retrofilling liquid, this handgrip part can reach predetermined effect and obtain required net shape.Container of the present invention easily manufactured and easy and under the situation of the weight of increase container within reason, can solve undesirable problem on deformation.
The invention provides the method that a kind of manufacturing is used for the blow molding plastic containers of splendid attire soda, this method comprises: a blow molding plastics precursor is provided, described precursor has definite shape and wall thickness and comprises an outer wall and an inner member, described outer wall has inner surface and outer surface, and described inner member links to each other with the inner surface of described outer wall; Determine the mechanical performance of described precursor and determine to be subjected near the stress distribution the described position under the internal pressure effect in several selected positions at described precursor; Wall thickness by changing described precursor and at least one in the shape prepare an improved precursor in case obtain one desirable because of applying the form of distortion that stress that internal pressure produces causes; Thereby provide desirable blow molding plastic containers.
Preferably, precursor is carried out that improved step can reduce also that stress is concentrated so that stress is concentrated is limited in the specific scope.
Just find out other advantage of the present invention from the following description.Description of drawings
For convenience of description, present invention is described below in conjunction with accompanying drawing, wherein:
Fig. 1 is the side cross-sectional view that is used to make a prefabricated component of container of the present invention;
Figure 1A is the profile along 1A-1A line among Fig. 1;
Fig. 2 A is the fragmentary, perspective view that is used to form a core of prefabricated component among Fig. 1;
Fig. 2 B is the sectional view that is used to form a core injection mould system of prefabricated component among Fig. 1;
Fig. 3 is one and utilizes a prefabricated component similar to prefabricated component among Fig. 1 to form the partial section of the blow molding die of container of the present invention;
Fig. 4 is the front view of container of the present invention;
Fig. 5 is a profile of representing container shown in Figure 4 along 5-5 line among Fig. 4, the container of soda of wherein having represented container precursor under fill liquid state not and filling;
Fig. 6 is the container inner wall under certain internal pressure and the partial section of outer wall intersection;
Fig. 7 is the sectional view that amplify the part similar to Fig. 6;
Fig. 8 is the sectional view that amplifies to Fig. 6 part similar with Fig. 7, and what the figure shows is a kind of modification of the present invention.
Preferred embodiment
According to the present invention, container of the present invention has the inwall that can form compartment, and/or recess and the protuberance of being convenient to hand-held this container between described recess.
Can utilize the compression molded method to make the prefabricated component that is used to form described container, described prefabricated component comprises at least one inwall, described inwall with the container of final blow molding moulding and pressurization in the inside of crossing described prefabricated component fully, the corresponding position of interior support element.
With reference to Fig. 1, make a plastic parison or prefabricated component 10 by the pressure molding method with synthetic resin, described synthetic resin is biaxial orientation preferably, for example PETG.Described prefabricated component 10 has a neck 11, this neck 11 defines an opening 12, described prefabricated component 10 can be provided with external screw thread 13, described external screw thread 13 can with the blow molding plastic containers that finally obtain on one the lid or locking device engage, for example with one optionally locking device engage.Described prefabricated component 10 has a main part 14 and a bottom 15 of extending from described main part 14 of extending from described neck 11 downwards downwards, and described bottom 15 is one with main part 14.Main part among Fig. 1 is the cardinal principle tubulose, but described main part also can adopt other structure that is different from tubulose.Neck 11 has an inner wall surface 11A and an outer wall surface 11B, and body main part 14 has an inner wall surface 14A and an outer wall surface 14B, and bottom 15 has an inner wall surface 15A and an outer wall surface 15B.Main part 14 defines cavity 16 in prefabricated component 10, cavity 16 wherein in the bottom 15 places be sealing and open wide at neck opening 12 places.Some needed shape or conventional shapes can be adopted according to the desired final container characteristic that obtains in bottom 15, and for example bottom 15 can be complete semicircle shown in Fig. 1, a straight or inside a little bottom shape or is several legs.
Among Fig. 2 A and Fig. 2 B method of making prefabricated component 10 with injection molding has been shown, injection core 20 wherein comprise one be substantially cylindric outer wall 21 and with prefabricated component in the required corresponding groove 22 of separation inwall.Mode with routine places injection mould 23 with core 20, at the 25 position adjacent places, bottom with injection core 20 injection-moulding nozzle 24 is placed injection mould 23 in the mode with injection core 20 centerings.Core 20 forms a die cavity 26 in injection mould 23 so that between core 20 and injection mould 23, by injection-moulding nozzle 24 molten plastic 27 is injected die cavity 26 and makes described die cavity 26 be full of molten plastic 27.The groove 22 that molten plastic 27 also will flow in the core 20 is interior to form described inwall 17.Perhaps, if necessary, described inwall 17 also can form separately, then they is adhered on described prefabricated component or the precursor.Then, open the system that forms by described injection mould and core and prefabricated component 10 is taken out in the mode of routine.
When described prefabricated component is in the temperature of the type of being suitable for blow molding into, as shown in Figure 3, the prefabricated component 10 of described heat is placed in the blow molding die 30, therefrom form a hollow object by blow molding or stretch-draw blow molding method, described hollow object is as a precursor of container of the present invention, and the example that goes out shown here is a bottle with handgrip part.
The prefabricated component of described heat is placed in the blow molding die with required container precursor profile that obtains, blow molding die 30 as shown in Figure 3, be blown into compressed air so that described prefabricated component extends along axial and circumferencial direction, thereby described prefabricated component is expanded into and the corresponding shape 31 of described precursor, and described shape 31 as shown in phantom in Figure 3.This technology can be carried out having under the condition that is used to make axially extended tension rod of described prefabricated component or core bar, also can carry out under the condition that does not have described tension rod or core bar.If used such bar, so described bar should have and the identical tip of prefabricated component chamber quantity, and each described tip all is bearing in described prefabricated component bottom in each chamber.Described wall 17 will extend to the limit that blow molding die 30 is allowed.The inside of the blow molding die shown in Fig. 3 can form a hollow working of plastics, and described hollow working of plastics is the precursor of container shown in Fig. 4 40, and the dotted line among Fig. 5 has been represented the cross section of the protuberance of described precursor.Described blow molding die 30 comprises at least two adjacent protuberances, and described two adjacent protuberances are to be linked together by described recess, and described protuberance is not shown in the cross section shown in Fig. 3, but clearly show that described protuberance in Fig. 5.
According to the technology of routine, in Fig. 3 the direction shown in the arrow with described blow molding die separately to take out the container precursor of described blow molding.
As can be seen from Figure 5, the circumference of described precursor is greater than the circumference of its circumscribed circle.The wall 14 of prefabricated component shown in Fig. 1 10 is big at the level of stretch of other location at the recess area ratio that forms described handgrip part.In a preferred embodiment, as shown in Figure 1A, described prefabricated component wall can be provided with reinforcement 19 at described wall 17 and 14 intersections.In blow-moulding process, described reinforcement and described recess are juxtaposed, concentrate minimum thereby make at the stress that does not have may occur under the situation of described reinforcement.Described thicker region also can with described blow molding die on can form recess the zone and put to prevent this zone thin excessively.
Like this, utilize the formed plastic containers 40 of blow molding method to have a neck 41, a bottom 43 and a main part 44, wherein said neck 41 defines an opening 42, and described main part 44 interconnects described neck 41 and bottom 43.Described neck 41 be provided with described prefabricated component 10 on screw thread 13 corresponding external screw threads 45 to be used to be connected a locking device.Described bottom 43 can have a base 46 that axially inwardly is taper.Described container 40 also comprises the shoulder 47 that is used to connect described neck 41 and tubular body portion 44.
Container 40 is provided with the inwall 17 corresponding inwalls 50 of at least one and described prefabricated component 10, described inwall 50 crosses the cavity 51 in the described container 40 fully and can be from the bottom 43 extends to main part 44, also can be from the bottom 43 extends to described neck to form a container with compartment always.Described one or more inwall also can be limited to described handgrip part.
As can be seen, described inwall and described container are integrally formed from Fig. 3 and Fig. 5.Described one or more inwall can extend to the bottom (as shown in Figure 3) of described container always, but also initial sum ends in the described main part (as shown in Figure 4), perhaps extends to described neck or opening portion always.
With reference to Fig. 5, main part 44 has adjacent arch projection 60, and described adjacent arch projection 60 is linked together by recessed region or recess 61, and described recessed region or recess 61 are particularly suitable for the handgrip part as a size larger container.The handgrip part of other shape also can be set certainly.Supporting member 50 in cavity 51 links to each other with described recess so that keep certain interval and described supporting member can support described recess between the described recess turning up to prevent them.As can be seen from Figure 4, described inwall can end at the end of close described handgrip part in the main part.In another embodiment shown in Figure 4, described container 40 has by described recess 61 and projection 60 formed separated handgrip parts.Supporting member 50 adjacent settings with them and support described recess in the above described manner, described supporting member can extend to described bottom always or extend in the described shoulder.
Fig. 4 and Fig. 5 represent another embodiment of container 40 of the present invention, and described container preferably has a handgrip part.Fig. 5 shows formed projection precursor 52 in described blow molding die, dotted line among Fig. 5 is represented the boundary between described projection precursor 52 and the interior support element 50, and described interior support element 50 connects two adjacent recessed regions or recess 61 to prevent the junction expansion of described projection between supporting member 51 and recessed region 61 in its bottom.In the precursor of container 40, described projection precursor 52 has inwall and part charge 53, described inwall can be straight wall or have a bit outside tapering, as shown in phantom in FIG., described inwall and part charge 53 are linked together by arcuate part 54, therefore do the time spent when described container precursor is under pressure, for example the filling soda, described part charge 53 may be deformed to and is arcuate part 55, and described arcuate part 55 can limit the border of less projection 60.For the bottle that does not have the handgrip part projection with compartment, also has similar problem, promptly described be under pressure the effect and have in the bottle of compartment, described part charge 53 is being out of shape the projection that becomes between the described inwall under the restriction of described inwall, rather than distortion becomes a cross section that cardinal principle is rounded, this described just effect of being under pressure bottle showed.
A main purpose of the present invention is, the precursor of a final container of design, so that utilize above-mentioned step of exerting pressure to make described precursor be transformed into the desired final container that obtains, the effect that the required pressure of described transformation should be able to form the final profile of container and reach the final container performance.
Therefore, according to the present invention, test and measure the containers material by under several different ambient temperatures, size and dimension all very being carried out static test and creep near the diverse location place of the several sections in the precursor sample of required precursor, the mechanical performance of PETG (PET) for example particularly needs to be determined at the relation between the tensile stress and deflection under the condition of change time, temperature and other factor relevant with external environment.
Resulting average behavior is not sufficient to reach purpose of the present invention from test.Many performances of a blow-molded container are to change because of the variation of shape and size.These performances depend on the preform structure of made and at the Temperature Distribution of prefabricated component described in the process that described prefabricated component is handled and other variable.Therefore, change into because of internal pressure in the process of container at described precursor, corresponding stress one strain stress relation of specific location is depended in the stress at critical localisation place and corresponding distortion.
Particularly, consider final container may be in the external environment factor time, must be under the condition of static (instantaneous) and creep definite described stress one strain stress relation.
The geometry of the precursor that a reasonable prediction is gone out is as a starting point, and form of distortion is measured in a precursor sample under internal pressure.Suppose as mentioned above and to determine stress one strain information resulting data to be used for computer sample analysis technology, such as in the known finite element analysis method (FEA) with the required final container of deriving from the precursor geometry that FEA was predicted.When utilizing FEA to obtain the shape of required final container and obtaining its required final size, also can obtain corresponding stress distribution.For these data that will obtain, consider and state precursor performance and stress one strain stress relation in the diverse location place, the sized data of the sample of the precursor that dopes and required container is offered the FEA program.For example, when the performance of the performance of inwall 50 and outer wall 44 differed widely, the performance at the intersection point place of these walls also differed widely with performance away from these intersection point places.
These are equally applicable to intersection point between the diapire shown in wall 50 and Fig. 4 and other the wall thickness change remarkable position occurs, obtain the geometry of precursor and required final container thus.
Computer program FEA as is known has been used to be subjected in the design of structural member of stress effect, described structural member comprises container and the bottle that is subjected to the internal pressure effect, described computer program is mainly used in the performance during one's term of military service of the described structural member of prediction, comprises failure analysis.In fact, FEA utilizes the modulus characteristics of described structural member material therefor to be illustrated in known equational linear relationship between distortion in the ad hoc structure spare and the stress, and described modulus characteristics for example comprises features such as Young's modulus, Poisson's ratio, creep rate.Described FEA depends on the described modulus characteristics value as constant in the respective party formula usually, but it is irrelevant with required final structure part structural similarity and the structural member under similar environment, made, described modulus characteristics value is to determine according to fixing test, for example utilizes the sample that is manufactured from the same material to carry out tension test.Under the situation of the geometry of a complexity, because the difference of modulus characteristics can cause different implementation methods, therefore must adopt FEA, and the FEA that is adopted is a major part of product described here and this manufacturing process and product.
Described FEA can disclose the region of stress concentration as a stress distribution part, and described region of stress concentration can make deflection surpass the distortion boundary that required final container allows, even can reach the degree that described container was lost efficacy.Such stress is concentrated wall thickness sudden change place that for example appears between a wall thickness and another wall thickness.Therefore, one object of the present invention is, except determining the shape relation between precursor and the final container, also to detect the zone that stress is concentrated may appear, for example at the knuckle radius place and the very big place of wall thickness change, so that reduce to act on these stress in the localities, thereby avoid in described container occurring excessive strain as the time spent being subjected to internal stress when required container.
Fig. 6 to Fig. 8 has represented to exist the example of the concentrated ad-hoc location of stress, and described ad-hoc location has the morphological feature that possibility provides excessive stresses to concentrate.
Fig. 6 is illustrated in the inwall 50 of the container 40 under the internal pressure effect and the partial cross section figure of outer wall 44 intersection.The directed force F 1 of an expansion acts on the inwall, and a tangential directed force F 2 acts on the outer wall.These active forces have produced corresponding average tensile stress in the position of other except intersection point on the transverse cross-sectional area.At described intersection point place, stress is the several times of above-mentioned mean stress, and its size depends on Several Factors, and one of them key factor is the knuckle radius between described two walls and the microstructure at described intersection point place.Necessity design of prefabricated component injection mould is also depended in the selection of described knuckle radius.
The maximum stress of the measurable function as a structure function and described knuckle radius of FEA then under the prerequisite of the material shape of considering the diverse location place, but makes one's options so that adopt the prefabricated component that can produce allowable stress and the condition of molded bottle.
Fig. 7 has represented by a concentrated example of the stress that form produced of described precursor.Therefore it should be noted that stress is stackable, the stress that forms because of knuckle radius can be added on the stress that is produced by other factors, for example the stress that uneven form produced.Fig. 7 has represented the cross section identical with Fig. 6, and it is the part of a precursor sample.As can be seen, in the netted cross section at intersection location 70 places and the buildup of material that causes netted cross section and buildup of material greater than 71 and 72 places in the position.Therefore, it is spherical that the crystal structure 70A in the regular border circular areas in Fig. 7 is coarse-grain along the length direction of described intersection point, and described crystal structure 70A can be used as an effective breach in other thin brilliant cross section, concentrates thereby form stress.In addition, zone 70 direction is because its volume and subsequently to the reaction of heating and different.It can excessively be stretched to a splitting point, and/or has most spheroidal cementite degree, therefore can be used as a breach.
The difference of stretch rate can cause varying level and different types of degree of crystallinity.In the present embodiment, the deformation temperature in blow molding is different significantly between described two walls can increase.Crystalline plastics depends primarily on their crystalline orientations such as the performance of PET.When there was significantly difference in crystalline orientation in identical structure, stress appearred in described structure, its effect with in structural mutation, what for example occurred under the situation of a breach is similar.
Pay special attention to the position 70 in Fig. 7, the material accumulating that prefabricated component, precursor and final container occur in this place, position can cause before blow molding prefabricated component being heated the significant difference of institute's requirement condition.Therefore, wish that the temperature that near the zone zone 70 is reached is higher than the central authorities in zone 70 or the temperature of core in the identical time.This is effective for prefabricated component that significantly there are differences between the appropriate section of precursor and/or final container and precursor form of distortion.Once more, produced a notch effect.
Have only when FEA is based on stress one strain data to these critical localisation places and carries out labor, FEA can be used for just judging that dimension correction is to avoid these breach.
Usually,, must have enough knuckle radius and identical wall thickness with intersection between the wall, when adopting the PET material, also must judge the difference of described precursor on crystal habit at wall for a good precursor.
Fig. 8 is a sectional view similar with Fig. 7 to Fig. 6, the figure shows an embodiment of the invention in the cross section that is used to be adjusted at the intersection precursor, wherein the intersection point place near described inner member 76 and described outer wall 74 is provided with an external slot 73 on the outer surface 75 of described outer wall 74.
It should be understood that the present invention is not limited to the content shown in foregoing description and the accompanying drawing, they only are the descriptions to most preferred embodiment of the present invention, and can improve shape, size and the arrangement of various piece and each details of operation.The various improvement of in the protection domain that claims limited the present invention having been done all will fall within the scope of protection of the present invention.
Claims (7)
1. a manufacturing is used for the method for the blow molding plastic containers (40) of splendid attire soda, this method comprises: a blow molding precursor (31) is provided, described precursor has definite shape and wall thickness and comprises an outer wall and an inner wall element (50,76), described outer wall has inner surface and outer surface, and described inner wall element links to each other with the inner surface of described outer wall; Measure mechanical performance in the several selected position of described precursor and be subjected near the stress distribution definite described position under the internal pressure effect at described precursor; Wall thickness by changing described precursor and at least one in the shape provide an improved precursor so that obtain desirable because of applying the form of distortion that stress that internal pressure produces causes; Thereby provide desirable blow molding plastic containers (40).
2. the method for claim 1 is characterized in that, the described step that precursor is changed reduces that stress is concentrated so that stress is concentrated is limited in the specific scope.
3. the method for claim 1 is characterized in that, determines that the stress distribution of described precursor under the internal pressure effect is to design a kind of desirable blow molding plastic containers.
4. method as claimed in claim 3 is characterized in that, described method comprises makes one and the very similar precursor (31) of described desirable blow molding plastic containers (40); Described precursor (31) is pressurizeed and determines stress distribution and distortion in the described precursor.
5. method as claimed in claim 4 is characterized in that, utilizes the finite element analysis method to determine described stress and deformation behaviour according to the performance profile of described precursor.
6. the method for claim 1 is characterized in that, described method is included in that the intersection point place near described inner wall element (76) and described outer wall is provided with a groove (73) on the outer surface of described outer wall (74).
7. method as claimed in claim 6 is characterized in that, described groove is designed so that at the structural form at described intersection location place even substantially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180822 CN1241961A (en) | 1998-02-23 | 1998-02-23 | Process for obtaining blow molded plastic containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97180822 CN1241961A (en) | 1998-02-23 | 1998-02-23 | Process for obtaining blow molded plastic containers |
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| CN1241961A true CN1241961A (en) | 2000-01-19 |
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| CN 97180822 Pending CN1241961A (en) | 1998-02-23 | 1998-02-23 | Process for obtaining blow molded plastic containers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478654C (en) * | 2005-02-17 | 2009-04-15 | 西德尔合作公司 | Method for controlling a container blow molding machine to correct anomalies in material distribution |
| CN101365572B (en) * | 2006-02-10 | 2011-01-12 | 考特克斯·特克斯罗恩有限公司及两合公司 | Method for producing a plastic hollow body and a plastic container installed with a embedding device |
| CN103189178A (en) * | 2010-11-11 | 2013-07-03 | 荷兰联合利华有限公司 | PET blow moulding method for producing blow moulded PET containers and such a container |
| CN108376195A (en) * | 2018-02-13 | 2018-08-07 | 昆山澎睿信息技术有限公司 | A kind of plastic bottle strength analysis method and application based on blow molding |
-
1998
- 1998-02-23 CN CN 97180822 patent/CN1241961A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100478654C (en) * | 2005-02-17 | 2009-04-15 | 西德尔合作公司 | Method for controlling a container blow molding machine to correct anomalies in material distribution |
| CN101365572B (en) * | 2006-02-10 | 2011-01-12 | 考特克斯·特克斯罗恩有限公司及两合公司 | Method for producing a plastic hollow body and a plastic container installed with a embedding device |
| CN102001176B (en) * | 2006-02-10 | 2011-12-21 | 考特克斯·特克斯罗恩有限公司及两合公司 | Plastic hollow body equipped with insert |
| CN103189178A (en) * | 2010-11-11 | 2013-07-03 | 荷兰联合利华有限公司 | PET blow moulding method for producing blow moulded PET containers and such a container |
| CN108376195A (en) * | 2018-02-13 | 2018-08-07 | 昆山澎睿信息技术有限公司 | A kind of plastic bottle strength analysis method and application based on blow molding |
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