CN110281506A - Negative drawing connecting rod and positive filling level control-rod - Google Patents
Negative drawing connecting rod and positive filling level control-rod Download PDFInfo
- Publication number
- CN110281506A CN110281506A CN201910151498.4A CN201910151498A CN110281506A CN 110281506 A CN110281506 A CN 110281506A CN 201910151498 A CN201910151498 A CN 201910151498A CN 110281506 A CN110281506 A CN 110281506A
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- Prior art keywords
- prefabricated blank
- mold cavity
- plastic containers
- bar
- prefabricated
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/14—Clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
- B29C2049/4602—Blowing fluids
- B29C2049/465—Blowing fluids being incompressible
- B29C2049/4664—Blowing fluids being incompressible staying in the final article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/783—Measuring, controlling or regulating blowing pressure
- B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/78—Measuring, controlling or regulating
- B29C49/786—Temperature
- B29C2049/7861—Temperature of the preform
- B29C2049/7862—Temperature of the preform characterised by temperature values or ranges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
- B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
- B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
It is a kind of using prefabricated blank shape plastic containers die device and relative method.The die device includes the mold for limiting mold cavity, for engaging inside prefabricated blank to limit the optional pressure source being centrally arranged for stretching starting bar and can be positioned in prefabricated blank and introducing pressurized fluid for stretching initiation region.
Description
Cross reference to related applications
This application claims the U.S. Patent application No.13/661,213 submitted on October 26th, 2012 and in 2011
The priority for the U.S. Provisional Application No.61/552,075 that October 27 submitted.The entire disclosure of above-mentioned application is used as reference simultaneously
Enter the application.
Technical field
The disclosure relates generally to form the container for keeping the commodity such as solid or liquid commodity.More precisely
It says, this disclosure relates to a kind of centring means that the former with the plastic containers for being used to form blow molding is used together, as far as possible
Ground, which is reduced, to be polluted and prefabricated blank is maintained desired orientation
Background technique
This part provides background information that is related with the disclosure, being not necessarily the prior art.
The considerations of for environment and other aspects, is held using plastic containers, more precisely polyester more than ever beforely now
Device, most definitely polyethylene terephthalate (PET) container come pack in the past with glass container supply a variety of commodity.System
Quotient and filler and consumer are made it has been realized that pet container is that lightweight is cheap, and being can a large amount of regenerations and system
It makes.
The plastic containers of blow molding have become customary in terms of packing a variety of commodity.PET is crystallizable polymerization
Object, it is meant that it can as an amorphous form or half hitch crystalline form obtains.Pet container maintains the ability of its material integrity to be related to
Pet container is in the percentage of crystal form, also referred to as " crystallinity " of pet container.Following equation is defined with volume fraction
The percentage of crystallinity out:
Wherein, ρ is the density of PET material；ρ a is the density (1.333g/cc) of pure amorphous PET material；And ρ c is pure crystalline substance
The density (1.455g/cc) of state material.
Container manufacturer increases the PET polymer crystallinity of container using mechanical treatment and heat treatment.Mechanical treatment relates to
And orient amorphous material to obtain strain hardening.The PET that the processing is usually directed to axis stretching injection molding along longitudinal direction is pre-
Base, and expand PET preform along horizontal axis or radial axle, to form pet container.The combination facilitates defined in manufacturer
The biaxial orientation of molecular structure in container.The manufacturer of pet container is generated in the side wall of container at present using mechanical treatment
Pet container with about 20% crystallinity.
However, prefabricated blank will receive damage during machining or become unclean in some prior art configurations.
That is, in some constructions, it was found that prefabricated blank can be aligned with mechanical device during stretching, and be subsequently resulted in and mould type
The too early contact of chamber and/or the contact with other mechanical device.Thus the misalignment can lead to defect and loss.
In some cases, the heat treatment used is related to heating material (amorphous state or semi-crystalline state) to promote crystal growth.
About amorphous material, the heat treatment of PET material obtains the spherical-like morphology for interfering light to penetrate.In other words, the crystalline material obtained
It is opaque, therefore substantially undesirable.However, using after mechanical treatment, heat treatment can having for container
Those of biaxial molecule orientation leads to higher crystallinity and excellent transparency for part.The heat of pet container after orientation
Processing, also referred to as thermal finalization generally include to lean against PET preform and are heated to about 250-350 (about 121 DEG C -177 DEG C) temperature
Blow molding on mold, and the container of blow molding was maintained on the mold of heating for about two (2) to five (5) seconds.It must be about 185
The manufacturer of (85 DEG C) the PET juice bottles for carrying out hot filling is generated using thermal finalization at present has about 25%-35% range
The PET bottle of interior whole crystallinity.
Summary of the invention
This part provides the general summary of disclosure, is not the comprehensive disclosure to its gamut or all features.
According to the principle of the disclosure, provide it is a kind of using prefabricated blank shape plastic containers die device and with its phase
The method of pass.The die device includes the mold for limiting mold cavity, is stretched inside prefabricated blank with limiting for engaging
The stretching in beginning region originates lever system and can be positioned in prefabricated blank, the pressure being centrally arranged for introducing pressurized fluid
Source.
In some embodiments, this introduction provides a kind of equipment for shaping plastic containers using prefabricated blank, described
Prefabricated blank has the top with opening, main body and the internal capacity that can be close to via opening.The equipment includes: mold, is limited
Mold cavity for expanding prefabricated blank out, the mold cavity has upper end, lower end and axis extends from upper end along longitudinal direction
To the center portion of lower end, the mold has for via upper end, close to the first hole of mold cavity, first hole to be suitable for
Prefabricated blank is kept at an upper portion thereof, and the main body of prefabricated blank is placed in the center portion of mold cavity；Liquid supply part is used
It is supplied by the opening, and by fluid under pressure into the internal capacity of prefabricated blank in supplying fluid under pressure；And centering bar,
It is arranged adjacent to the lower end of mold cavity, and can extend into axis retractility the center portion of mold cavity along longitudinal direction.
In some embodiments, centering bar includes top at its upper end, the top be suitable for be arranged in it is prefabricated
Surface engagement on the outer surface of base main body.
In some embodiments, the top of centering bar includes protrusion, and the protrusion, which is adapted to engage with, is arranged in prefabricated blank master
Groove on the outer surface of body.
In some embodiments, the top of centering bar includes groove, and the groove is adapted to engage with from prefabricated blank main body
The protrusion that outer surface extends.
In some embodiments, centering bar can extend to retractility between extended position and retracted position, wherein
In retracted position, centering bar be may not extend in the center portion of type chamber.
In some embodiments, centering bar is arranged in the lower section of mold cavity lower end, and centering bar can be via mould type
Extend in the center portion of mold cavity to second hole retractility of chamber lower end.
In some embodiments, centering bar is integrated in the bottom of mold.
In some embodiments, the equipment includes stretch rod, and the stretch rod can move along the longitudinal direction to be passed through
First hole, and move into the internal capacity of prefabricated blank.
Therefore, this introduction provides a kind of method for shaping plastic containers using prefabricated blank, comprising the following steps: heating
Prefabricated blank with internal capacity；Prefabricated blank is placed in the mold cavity of mold；By inserting the liquid at a pressure that
The internal capacity of prefabricated blank and expand prefabricated blank；And prefabricated blank is maintained at mould using the centering device that scalability expands
In the central volume of tool type chamber.
In some embodiments, the centering device of the scalability expansion is applied in not any opposite longitudinal force
Fully extended position and the contraction when applying opposite longitudinal force are extended to when adding to the centering device of scalability expansion.
In some embodiments, by prefabricated blank be maintained at the step in the central volume of mold cavity include make it is scalable
Property expansion the top of centering device the step of being engaged with the surface being arranged on prefabricated blank outer surface.
In some embodiments, prefabricated blank is maintained at the step in central volume earlier than the step for expanding prefabricated blank
It is rapid to carry out.
In some embodiments, the prefabricated blank is maintained in the central volume of the mold cavity up to by that will pressurize
Fluid introduce the internal capacity of prefabricated blank and at least the first half the step of expand prefabricated blank.
In some embodiments, pre- to stretch the method also includes applying drawing force by the inner surface to prefabricated blank
The step of base.
In some embodiments, a kind of equipment for shaping plastic containers using prefabricated blank is provided, is adapted for carrying out
Above-mentioned steps.
By description provided herein, other fields of the scope of application can become obvious.Explanation in summary of the invention and
The purpose that particular example is merely to illustrate, is not intended to limit the scope of the disclosure.
Detailed description of the invention
Attached drawing described herein is only used for explaining the purpose of selected embodiment, is not used to explain all possible
Embodiment, and be not intended to limit the scope of the present disclosure.
Figure 1A -1C is a series of schematic side elevations (not in scale), and it is pre- to show the center rod guidance during forming process
Base；
Fig. 1 D is the schematic side elevation for showing the slip state of center rod；
Fig. 2A -2D shows multiple location structures of principle according to this teaching；
Fig. 3 A-3B shows extraction from container and stretches starting bar to generate fluid reserved space；
Fig. 4 A-4B, which is shown, will stretch in starting bar insertion container to generate Fluid pressure peak value；
Fig. 5 A shows the die device with center rod according to this teaching；
Fig. 5 B shows the die device with the centering feature coupled with center rod according to this teaching；
Fig. 6 A-6F is a series of schematic side elevations (not in scale), and it is pre- to show the center rod guidance during forming process
Base；And
Fig. 7 is the flow chart of the manufacturing process of some embodiments according to this teaching.
In several views of attached drawing, corresponding label represents corresponding component.
Specific embodiment
Illustrative embodiments are described more fully with referring now to attached drawing.Illustrative embodiments are provided so that the disclosure is filled
Divide ground that range is comprehensively communicated to those skilled in the art.Illustrate many specific details, such as particular elements, device and side
The example of method fully understands embodiment of the present disclosure with providing.It will be appreciated by those skilled in the art that: it does not need
Using specific detail；Illustrative embodiments can be presented as many different forms；And it is understood not to the limitation disclosure
Range.
Term used herein is only used for the purpose of description specific exemplary embodiments, is not intended to limit.Such as this
As used herein, it is unless the context clearly indicates otherwise other situation that "one" can be intended to also include plural form singular.
Term " includes " and its variant are inclusives, and thus clearly state the feature referred to, number, step, operation, element and/or
The presence of component, but be not precluded additional one or more of the other feature, number, step, operation, component, assembly unit and/or they
Group presence.Method and step, process and operation described herein should not be construed as must be specific suitable with what is discussed or illustrate
Sequence requires their performance, unless being clearly determined as the sequence of performance.It will also be appreciated that additional or substitution step can be used
Suddenly.
When an element or layer be mentioned as " ... on ", " being joined to ", " being connected to " or " being connected to " another element or layer
When, can directly exist ... and go up, be joined to, be connected to or be connected to another element or layer, or there may be intermediary element or
Layer.On the contrary, when an element is mentioned as " on directly existing ... ", " being directly connectcted to ", " being directly connected to " or " being directly coupled to "
When another element or layer, intermediary element or layer is not present.Other words for describing relationship between element should be understood as class
As mode (for example, " between ... between " and " directly between ... between ", " adjacent " and " direct neighbor " etc.).Such as institute herein
It uses, term "and/or" includes one or more any and all combinations of article listed by correlation.
Although term first, second, third, etc. can be used herein to describe each component, assembly unit, region, layer and/or portion
Point, but these component, assembly units, regions, layers, and/or portions should not be limited by these terms.These terms can be only used for area
Divide a component, assembly unit, region, layer or part and another region, layer or part.Than as used in this article " first ", " the
Two " and the terms of other numerical terms be not meant to order or sequence, unless clearly explanation is other situations in context.Cause
This, is in the case where not departing from the introduction of illustrative embodiments, first element, component, region, layer or part discussed below
It is properly termed as second element, component, region, layer or part.
For ease of description, can be used spatially relative term herein, for example, " inside ", " outside ", " in lower section ",
" below ", " lower part ", " above ", " top " etc. describe an elements or features shown in the drawings and another element
Or the relationship of feature.Spatially relative term can be intended to comprising device in use or in operation other than the orientation shown in the attached drawing
Different direction.For example, being described as the member of " below other elements or features or lower section " if the device in attached drawing is overturn
Part will be oriented to " on other elements or features ".Therefore, above and below exemplary term " in lower section " can include
Orientation.In addition device can be orientated (be rotated by 90 ° or other orientation), spatial relative descriptor used herein is interpreted accordingly.
This introduction provides a kind of stretch blowing machine, and having can be used to engages prefabricated blank appearance during molding process
The centring means of device and the stretching that can be used to generate stretching initiation region on prefabricated blank container originate device.With molding
Machine is different, and stretching starting device can be used for starting stretching prefabricated blank, and prefabricated blank is promoted to engage centring means.With conventional moulding press
Difference, the centring means of this introduction provides the improved control to maintaining prefabricated blank to be in preset bearing, to minimize stretch rod
Contact with prefabricated blank, because it will lead to the pollution of finished container.
As used herein discussed in more detail, the shape of described container can be in many variation examples according to this teaching
Either one or two of.For non-limiting example, the container of the disclosure can be configured to keep multiple commodity of such as beverage, food
Any of or other hot filled-type materials.
It should be appreciated that the size and exact shape of centring means depend on the size and shape of container to be formed.Cause
This, it is to be appreciated that there are modifications in presently described design.
This introduction is related to forming one (one-piece) plastic containers.In general, after its formation, these containers are usual
Limit a main body comprising there is the top for the cylindrical side wall for forming end portion (finish).It is integrally formed simultaneously with end portion
What is extended downwardly from it is shoulder.Shoulder is incorporated to and provides transition region between end portion and sidewall portion.Sidewall portion from shoulder to
Under extend to the base portion with substrate.In some embodiments, upper transition part can be limited to the mistake between shoulder and sidewall portion
It crosses in area.In some embodiments, lower transition part can be limited in the transition region between base portion and sidewall portion.
Exemplary containers can also have neck.Neck can have very short height, that is, become short from end portion
Extension, or with the elongation height extended between end portion and shoulder.Top can limit an opening.Although container
Be shown as drinking container and food containers, it should be appreciated that, can principle according to this teaching be made there is not similar shape
Shape, such as side wall and open container.
The end portion of plastic containers may include having threaded threaded portion, lower seal ridge (lower sealing
) and support ring ridge.Threaded portion provides the connection type similar to screw thread cover or lid (not shown).Alternate embodiments
It may include the other suitable device engaged with the end portion of plastic containers, such as press-fit or the cap that is clasped.Correspondingly, it covers
Or cap (not shown) engaging end portion is preferably to provide the gas-tight seal of plastic containers.Cover or lid (not shown) is preferably by making
The common plastics of lid industry or metal material are made, which is suitable for subsequent heat treatment.
Can principle according to this teaching form container.The prefabricated blank form of container includes support ring, can be used for manufacturing
The different phase of process supports or orientation prefabricated blank.For example, prefabricated blank can be can be used for by support ring bearing, support ring assist will be pre-
Base is located in mold cavity, or is once molded as, and support ring can be used to carry intermediate receptacle.Originally, prefabricated blank can
It is placed in mold cavity, so that support ring is occupied in the upper end of mold cavity.
In general, as shown in Figure 5 A and 5B, mold 300 may include mold cavity 302, and mold cavity has and is blow molded into
Container the corresponding inner surface 304 of expectation outer profile.More precisely, mold cavity according to this teaching limits main body shape
At region, optional stain (moil) forming region and optional opening forming region.In some embodiments, once being formed
Any stain generated by stain forming region can be cut off and be abandoned to obtained structure, hereinafter referred to intermediate receptacle.It should
It is realized that all embodiments in all forming methods or according to this teaching, it is not necessary that use stain forming region
And/or opening forming region.
In one example, machine will be heated to the prefabricated blank of temperature between about 190 to 250 (about 88 DEG C to 121 DEG C)
It is placed in mold cavity.Mold cavity can be heated to the temperature between about 250 to 350 (about 121 DEG C to 177 DEG C).Interior drawing
Heated prefabricated blank in mold cavity is stretched or is extended to the length of approximately equal to intermediate receptacle length by boom equipment, to make
Polyester material molecularly oriented is axial direction substantially corresponding with the central longitudinal axis of container.Prolong prefabricated blank in stretch rod
While stretching, there is 300PSI to 600PSI (2.07MPa to the pressure between 4.14MPa) from the pressure source being centrally arranged
Fluid (for example, liquid, such as final fluid commodity；Air etc.) assist in axial direction extend prefabricated blank and circumferentially or
Ring direction expands prefabricated blank, to make the shape of biaxial, and further makes polyester material point
Son is oriented to the direction being generally perpendicular to axial direction, so that the biaxial molecule for establishing polyester material in the major part of container takes
To.Before taking out intermediate receptacle in mold cavity, pressurized fluid keeps the polyester material of predominantly biaxial molecule orientation
The time of about two (2) to five (5) seconds on mold cavity.The process is known as thermal finalization, and obtains being suitable for filled high-temperature product
Heatproof container.
Referring particularly to Figure 1A -4B, the internal structure or surface that can engage prefabricated blank 112 is can be used in stretch-blow system
Central interior stretches starting lever system 20 and/or can engage outside the external structure 110 of prefabricated blank 112 or the center of other parts
Portion's lever system 100.It should be appreciated that principle according to this teaching, can be used alone or be used in combination central interior stretching
Originate lever system 20 and central external lever system 100.Furthermore, it is possible to independently and/or simultaneously stretch starting using central interior
Lever system 20 and central external lever system 100.
Referring particularly to Figure 1A, 3A, 3B, 4A and 4B, in some embodiments, can relative to prefabricated blank 112 be lifted or
It reduces and stretches starting lever system 20, to provide the mechanical thrust to the inner surface of prefabricated blank 112.Stretching starting lever system 20 can wrap
Include with distal end 24 bar component 22, the axis of elongation 26 and drive system 28, drive system be connected to the axis of elongation 26 with contraction (see
Fig. 3 B and 4A) and extend the position (see Figure 1A, 3A and 3B) between actuating distal end 24.Drive system 28 may include pneumatic actuation system
System, servo drive system or the other known system for moving bar component 22.In some embodiments, drive system
28 include servo or preceding retainer (positive stop), to provide location information.Moreover, in some embodiments, driving
System 28 can be used for supervising position and/or the driving speed of bar component 22 in real time, to provide real-time control.Additionally, it should understand
Although bar component 22 is described and illustrated as having vaulted cylindricality, other shapes and top are also foreseeable, packet
It includes but is not limited to conical, heterogeneous, taper, sharp, flat etc., or can change to limit predetermined body
Product.
It is noted, however, that stretching starting lever system 20 can separate or connect with the typical central bar of blow-molding system.
That is, stretching starting lever system 20 can be formed separately or be integrally formed with center rod.However, stretching starting lever system 20 can use
Distally 24 engagements or in addition contact prefabricated blank 112 stretch initiation region and/or pre-stretching to limit.With non-limiting implementation
For mode, it has been found that the pre-stretched length of about 40mm is beneficial, but other pre-stretched lengths are also suitable, such as are schemed
The distance X of 1A.This ensures to understand during molding to stretch to respond is distributed with material, rather than what conventional molding-system usually had
Unpredictable stretching response.Material distribution may include the non-uniform Distribution for predetermined design standard.
Referring to Figure 1A -1D, central external lever system 100 can be used in stretch blow-molded process as shown in figs. 1A-1 c
Period ideally maintains prefabricated blank 112 in preset bearing.Central interior stretch starting bar 20 can be ideally used to start at
Shape process.In this way, prefabricated blank 112, which starts to be stretched, originates the stretching of lever system 20 to obtain scheduled molding response, then, relatively
In maintaining center by central external lever system 100 in the stretch rod and/or stretching starting lever system 20 wherein extended, thus really
Paula boom will not further contact the inside of prefabricated blank, or at least only limit the contact with inside prefabricated blank.This stretching
It will lead to the container that pollution obtains inside bar contact prefabricated blank, to need to abandon or clean obtained container.
In some embodiments, stretching starting lever system 20 can be used in finally filling container obtaining accurately reserved
Space.Exactly, see that Fig. 3 A-3B, stretching starting lever system 20 can be actuated to and/or be made into prefabricated blank 112 and subsequently form
An accurate volume can be generated (that is, being arranged in for finished container (being completed by finally filling commodity) and the contraction of bar component 22
The volume of bar component 22 in final filling commodity), when deflated, which provides the expectation for packing and transporting
Reserved space.It can get reserved space accurate in this way in the case where the systems such as no complicated valve system.
Moreover, in some embodiments, stretching starting lever system 20 can be used for obtaining Fluid pressure peak value, pre- to assist
The forming of base 112 or container.Exactly, see Fig. 4 A-4B, stretching starting lever system 20 can be actuated to by 22 row of bar component
Fluid volume out is greater than the reserved space in prefabricated blank 112 or finished product bottle, so that bar component 22 is inserted into prefabricated blank 112 or is held
In device (have comprising and approximately fixed volume) pressure peak can be generated in prefabricated blank 112 or container.Such pressure spike
Value can be used for limiting the final details in prefabricated blank 112 or container.
Referring now to Fig. 1 D, in some embodiments, prefabricated blank 112 is formed as sliding from central external rod systems 100
It moves or becomes to be detached from.By polluting with the contact of central external lever system 100 and/or as caused by interior stretch rod, this would generally
Cause to damage prefabricated blank.
In order to overcome the problem, A-2D referring to fig. 2, in some embodiments, central external lever system 100 may include using
In engagement or the location structure 120 of other contact prefabricated blank 112.In some embodiments, location structure 120 may include limiting
The protrusion 122 of first shape out.Respective recesses 124 with the shape complementary with first shape are formed as prefabricated blank 112
A part.In this way, protrusion 122 can be clearly contained in recess 124, to limit reliable connection therebetween.
In some embodiments, protrusion 122 is sized and shaped to nearly consistent with recess 124, is laterally moved with minimizing
Dynamic (that is, movement on ring direction).The shape of protrusion 122 and recess 124 thus can be cylindricality (Fig. 2A and 2B), cone
Shape (Fig. 2 C and 2D), wide (Fig. 2 C), narrow (Fig. 2 B and 2D) or any other offer central external lever system 100 and prefabricated blank
The shape/size being reliably connected between 112.It has been described it should be appreciated that location structure 120 can be limited relative to those
The reverse azimuth (being indicated with similar prime label) in orientation, wherein location structure 120 may include the protrusion extended from prefabricated blank
Portion (Fig. 2 C and 2D), to engage the recess being formed in central external lever system 100.
In addition, central external lever system 100 can be from die device 200 in some embodiments as indicated by figures 5 a-5b
Generally cylindrical component (Fig. 5 A) is extended to, or may include the adjective-centre structure of a part arrangement along central external lever system 100
210.In some embodiments, adjective-centre structure 210 can be arranged on the excessive of the distal end 212 of central external lever system 100
Head component 211.In some embodiments, excessive component may include the conical section 214 of such as tapered segment, be dimensioned to
It receives and/or captures in the conical shaped depression 216 being formed in die device 200.In this way, in central external lever system 100
When contraction, conical section 214 can medially be received in conical shaped depression 216, with ensure properly to be aligned expand at this time it is pre-
Base 112 or obtained container.It is further appreciated that in some embodiments, the shape of excessive head component 211 can be done
It is shaped to a part of die device, and during forming obtained container there is prefabricated blank 112 centainly
Shape.
In some embodiments of this introduction, as shown in Fig. 6 A-6F, bar component 22 (such as negative drawing bar) and center
External rod systems 100 can be activated simultaneously and independently, to realize predetermined stretching and/or forming process.In this way, central external bar
System 100 can be activated from the substrate of mold cavity 302, and be come into play with physical touch before blow-moulding or contact prefabricated blank
112 or its can stop (see Fig. 1 and 6A) before contacting prefabricated blank.Central external lever system 100 can be proper from prefabricated blank 112
Locality is run up to about 20mm, however, in many embodiments, central external lever system 100 improves quality, and protects
The center of the center engaging central external rod systems 100 of prefabricated blank is demonstrate,proved, and is suitably maintained and is located in mold cavity 302.
The sky below prefabricated blank 112 and/or mold 300 is contacted needing the extra length of central external lever system 100
Between limitation prevent using with sufficient length come contact prefabricated blank 112 the central external lever system 100 being unitarily formed it is some
In embodiment, the central external lever system 100 of telescopic fashion can be used.That is, in some embodiments, can be used has
It is slidably received in the flexible negative drawing bar 102 of the first part 104 in second part 106.However, should recognize
It is that additional telescopic section can be used.
During manufacture, according to the flow chart of Fig. 7, central external lever system 100 (is also known as negative drawing bar) in Fig. 7
It can start expansion in any time before container starts expansion or and then container and engage prefabricated blank 112, however, in if
Centre external rod systems 100 are intended to engage prefabricated blank 112 prior to expansion, then preferably load prefabricated blank 112, however engage or activate
Central external lever system 100 (as shown in Fig. 7 sequence).Lever system 22 (negative drawing connecting rod is also known as in Fig. 7) can connect
Actuating, and prefabricated blank 112 can be made to be tightly engaged with central external lever system 100.Once prefabricated blank is fully engaged outside center
Portion's lever system 100, then container starts to expand.Pressure-air or liquid can be used, or use low-pressure air or liquid then
Two steps of pressure-air or liquid expand container.Prefabricated blank 112 can start to expand away from bar component 22, bar component 22
It can stop in situ, or from containers shrink.Once completing fill cycle and container being formed completely, then bar component 22 can be set
Desired depth into container, so that the expectation that packed height can be located in container as described above is deep when closing seam pin
Degree.Then, central external lever system 100 is removed from container, promotes nozzle, the container for being fully formed and filling is removed from mold
(product of appropriate amount stays in container).
Alternatively, using including such as thermoplastic, high density polyethylene (HDPE), polypropylene, polyethylene naphthalate
(PEN), other manufacturing methods of other conventional materials of PET/PEN mixture or copolymer and various multilayered structures, such as
Extrusion blow, one step injection stretch-blow and injection-blow molding may be adapted to manufacture plastic containers, and together with the principle of this introduction
It uses.
The purpose that the preceding description of embodiment is merely to illustrate and describes is provided.It is not intended to exhaustion or limits this hair
It is bright.The individual component or feature of particular implementation do not limit particular implementation usually, but interchangeable in application, and
It can be used in selected embodiment, it is such when being not explicitly shown or describe.It can also equally be varied in many ways.
Such variation is not to be regarded as a departure from the present invention, and all these variation examples should be within the scope of the present invention.
Claims (10)
1. a kind of equipment for shaping plastic containers using prefabricated blank, the prefabricated blank has top, main body and energy with opening
Enough internal capacities close via the opening, the equipment include:
Mold, has a mold cavity for making prefabricated blank expansion, and the mold cavity has upper end, lower end and axis along longitudinal direction
Extend to the center portion of the lower end from the upper end, the mold have for via the upper end close to the mould type
First hole of chamber, first hole is suitable for keeping the prefabricated blank at an upper portion thereof, and the main body of the prefabricated blank is placed on institute
It states in the center portion of mold cavity；
Liquid supply part is supplied by the opening, and by pressurized fluid into the prefabricated blank for supplying fluid under pressure
Internal capacity in；And
Centering bar is arranged adjacent to the lower end of the mold cavity, and can extend to axis retractility along longitudinal direction described
In the center portion of mold cavity.
2. the equipment for shaping plastic containers using prefabricated blank as described in claim 1, wherein the centering bar includes being located at
The top of centering bar upper end, the top are adapted to engage with the surface being arranged on the outer surface of prefabricated blank main body.
3. the equipment for shaping plastic containers using prefabricated blank as described in claim 1, wherein the centering bar can prolong
It stretches and extends to retractility between position and retracted position, wherein the centering bar may not extend to described in the retracted position
In the center portion of type chamber.
4. the equipment for shaping plastic containers using prefabricated blank as described in claim 1, wherein the centering bar is arranged in institute
State below the lower end of mold cavity, the centering bar can via the mold cavity lower end the second hole retractility extend to
In the center portion of the mold cavity.
5. a kind of method for shaping plastic containers using prefabricated blank, comprising the following steps:
Heat the prefabricated blank with internal capacity；
The prefabricated blank is placed in the mold cavity of mold；
Expand the prefabricated blank and in the internal capacity for inserting the liquid into the prefabricated blank at a pressure that；And
The prefabricated blank is maintained in the central volume of the mold cavity using the centering device that scalability expands.
6. the method for shaping plastic containers using prefabricated blank as claimed in claim 5, wherein the scalability expansion
Centering device extends to fully extended when not any opposite longitudinal force is applied to the centering device of scalability expansion
Position and shunk when applying opposite longitudinal force.
7. a kind of each step for being adapted for carrying out method for claim 5, the equipment for shaping plastic containers using prefabricated blank.
8. a kind of die device for shaping plastic containers using prefabricated blank, the die device include:
Mold limits the mold cavity for receiving the prefabricated blank；
Pressure source is fluidly coupled to the mold cavity, and the pressure source can be positioned in the prefabricated blank, is added with introducing
Press fluid；And
The central external bar that retractility extends, has the location feature formed with central external bar, and the location structure engages institute
The surface of prefabricated blank is stated, to maintain the central orientation of the prefabricated blank during forming.
9. a kind of method for shaping plastic containers using prefabricated blank, which comprises
Prefabricated blank is heated to the temperature between 190 ℉ and 250 ℉；
Mold cavity is heated to the temperature between 250 ℉ and 350 ℉；
The prefabricated blank is inserted into the mold cavity；
Actuating stretches starting lever system to engage the inside of prefabricated blank, stretches initiation region to limit；
Pressurized fluid is guided to enter in the prefabricated blank, so that the prefabricated blank, which is expanded into, nearly meets the mold cavity；
And
The central external bar that actuating retractility extends makes the location feature being formed on central external bar engagement described pre-
The surface of base, generally to maintain the prefabricated blank during at least part of the guidance pressurized fluid
Preset bearing.
10. method as claimed in claim 9, further includes:
After at least part of the guidance pressurized fluid, the stretching starting lever system is activated with raw in container
At reserved space.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161552075P | 2011-10-27 | 2011-10-27 | |
| US61/552,075 | 2011-10-27 | ||
| CN201280064635.7A CN104010792A (en) | 2011-10-27 | 2012-10-26 | Counter stretch connecting rod and positive fill level control rod |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280064635.7A Division CN104010792A (en) | 2011-10-27 | 2012-10-26 | Counter stretch connecting rod and positive fill level control rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110281506A true CN110281506A (en) | 2019-09-27 |
Family
ID=51229735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910151498.4A Pending CN110281506A (en) | 2011-10-27 | 2012-10-26 | Negative drawing connecting rod and positive filling level control-rod |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2771167A4 (en) |
| CN (1) | CN110281506A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051138A (en) * | 1989-10-23 | 1991-05-08 | 日精Asb机械株式会社 | Make the method and apparatus of biaxial orientation blown container |
| JP2002067131A (en) * | 2000-08-30 | 2002-03-05 | Aoki Technical Laboratory Inc | Stretch blow molding method and blow mold |
| US20030185929A1 (en) * | 2002-01-15 | 2003-10-02 | Gary Ferguson | Blow molded plastic container with inclined mouth and method and apparatus for obtaining same |
| CN101844396A (en) * | 2008-12-19 | 2010-09-29 | 克朗斯股份有限公司 | Electrically driven blower |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58123029U (en) * | 1982-02-15 | 1983-08-22 | 株式会社吉野工業所 | Bottom mold device in biaxial stretch blow molding machine |
| JPH074848B2 (en) * | 1986-09-22 | 1995-01-25 | 株式会社吉野工業所 | Biaxial stretching blow molding method |
| JP3350192B2 (en) * | 1993-12-01 | 2002-11-25 | 大日本印刷株式会社 | Pressure-resistant self-standing container and method of manufacturing the same |
| CH690003A5 (en) * | 1995-10-10 | 2000-03-15 | Tetra Pak Plastics Ltd Tetra P | Blow-molding plant module, includes preform-followers reaching into molds to guide and complete expanding preform, operating in conjunction with special holder which maintains sterility inside colder neck |
| JPH1071641A (en) * | 1996-08-31 | 1998-03-17 | Yoshino Kogyosho Co Ltd | Mold apparatus for biaxial stretching blow molding |
| CA2508450A1 (en) * | 2002-12-12 | 2004-06-24 | A.K. Technical Laboratory, Inc. | Elongation drive device of stretch rod in stretch blow molding machine and bottom-type lifting drive device |
| CN102256764B (en) * | 2008-12-17 | 2014-05-28 | 东洋制罐株式会社 | Method for producing synthetic resin container |
-
2012
- 2012-10-26 EP EP12843561.7A patent/EP2771167A4/en not_active Withdrawn
- 2012-10-26 CN CN201910151498.4A patent/CN110281506A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051138A (en) * | 1989-10-23 | 1991-05-08 | 日精Asb机械株式会社 | Make the method and apparatus of biaxial orientation blown container |
| JP2002067131A (en) * | 2000-08-30 | 2002-03-05 | Aoki Technical Laboratory Inc | Stretch blow molding method and blow mold |
| US20030185929A1 (en) * | 2002-01-15 | 2003-10-02 | Gary Ferguson | Blow molded plastic container with inclined mouth and method and apparatus for obtaining same |
| CN101844396A (en) * | 2008-12-19 | 2010-09-29 | 克朗斯股份有限公司 | Electrically driven blower |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2771167A1 (en) | 2014-09-03 |
| EP2771167A4 (en) | 2015-10-14 |
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