CN107000299B - The receptacle-forming processes of stretching rod are braked during blowing - Google Patents
The receptacle-forming processes of stretching rod are braked during blowing Download PDFInfo
- Publication number
- CN107000299B CN107000299B CN201580065578.8A CN201580065578A CN107000299B CN 107000299 B CN107000299 B CN 107000299B CN 201580065578 A CN201580065578 A CN 201580065578A CN 107000299 B CN107000299 B CN 107000299B
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- China
- Prior art keywords
- blowing
- stretching rod
- container
- mould bottom
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- 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
- 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
- B29C49/122—Drive means therefor
- B29C49/1232—Magnetic
-
- 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
- B29C49/28—Blow-moulding apparatus
- B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
- B29C49/36—Blow-moulding apparatus having movable moulds or mould parts rotatable about one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- 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
Abstract
A kind of manufacturing method for container utilizes plastics crude green body (3) manufacture container (2) in molding equipment (1), and molding equipment is furnished with: mold (5)；The injection device (11) of injection fluid in crude green body (3)；The stretching rod (26) that can be moved between high-order and low level；The method includes: the process introducing crude green body (3) in mold (5) in succession；Pre- blowing process is included in the operation of the pre- blowing pressure fluid of injection in crude green body (3) and makes stretching rod (26) from its high-order operation mobile to its low level；Process is blown, is included in crude green body (3) and injects blowing pressure fluid；With stretching rod (26) the mechanical braking of low level operation.
Description
Technical field
The crude green body that the present invention relates to the use of plastics (such as polyethylene terephthalate or PET) system passes through stretching
Blowing crude green body carrys out manufacture container.
Background technique
In general, container has main body, closes the bottom of main body and in main body open upper end in lower body to allow
The neck of container filling and discharge.
For manufacture container, will be previously heated to be higher than material glass transition temperature (being in the case of pet about 80 DEG C)
Temperature crude green body (crude preform or by crude preform pass through preforming operation obtain centre
Container) it is introduced into mold, mold has the wall of the die cavity of container type chamber equipped with limiting；And pressure fluid is such as pressed by neck
Strength body (usually air) is injected into crude green body, so that material reclines on the mould wall.Injection generally with two procedures into
Row: blowing process in advance, and pre- process of blowing is to be generally the so-called pre- blowing pressure injection fluid between 5 to 10 bars；Then
It is blowing process, is to inject fluid with the so-called blowing pressure being higher than between pre- blowing pressure, generally 20 to 40 bars.
In pre- blowing, foam is formed by the material of heating and softening, foam is simultaneously along parallel with the main shaft of mold
Axial direction and along vertical with the axis of mold radial direction expansion and expansion.When blow starting when, material with mould
Have wall contact, but forms not completely.Blowing allows material to be tightly attached on wall, to form completely.
To avoid any container off-axis and ensuring the good distribution of material, using can move axially in a mold
Stick force crude green body to be axially stretched.The distal end that the stick has can push crude green body bottom, until being allowed to stick on container bottom
On the mould bottom of type chamber.
The movement with pneumatic cylinders control stretching rod known for a long time, for example, see French Patent (FRP) FR
2662631(DYNAPLAST).The pneumatic supply of pressurized strut is generally by being simply connected to 7 bars of (100psi (pounds/square English
It is very little)) compressed-air line ensured that the speed of stretching rod carries out mechanical adjustment by cam.
Recently it proposed to replace pneumatic control with Electromagnetic Control, it is same referring to French Patent (FRP) FR 2798093 or its U.S.
Race patent US 6722868, the two is all under SIDEL company name.The technology, which has, not only saves pressure air but also limits use
The two-fold advantage of wearing terrain (magnetic control contactlessly carries out) is intended to gradually replace not so good pneumatic of performance earlier
Control.
Preferably, stretching rod keep being against on mould bottom during blowing (and container material be located at stretching rod and mould bottom it
Between), any sliding occurs under the action of blowing pressure to avoid material, when container bottom (thus mould bottom) has complexity convex
It is especially true when rising.In fact, sliding will lead to uneven distribution of the material on bottom, so that the machinery for generating container is strong
Degree and equilibrium problem.
But the pressure in container generates axial resistance to the distal end of stretching rod, this axial resistance is intended to make to stretch
Stick leaves mould bottom (even if stretching rod rising).Therefore, in pneumatic control, actuation cylinder size, which must determine into, to be made to stretching
Stick is applied more than the driving force of resistance.And in Electromagnetic Control, stretching rod, which is held in place, will consume a large amount of electric currents, and be easy to draw
Play magnetic circuit overheat.
Summary of the invention
Therefore, a kind of purpose is to facilitate holding stretching rod during blowing, so that avoiding the mechanical composition part of control system
Any size excessive (in the case where pneumatic control) or limitation electrisity consumption (in the case where Electronic control).
For this purpose, a kind of manufacturing method for container is proposed first, for holding in molding equipment using the manufacture of plastic crude green body
Device, molding equipment are furnished with:
Mold is furnished with wall and mould bottom, and wall limits the die cavity with container type chamber, extends along main shaft, mould bottom is in wall
Lower end closed die cavity；
Injection device, has pre- blowing circuit and blowing circuit, and pre- circuit of blowing is furnished with pre- blowing pressure fluid
Source, blowing circuit are furnished with blowing pressure fluid source, and blowing pressure is higher than pre- blowing pressure；
Draw unit, with movable part, movable part includes stretching rod, and stretching rod can exist relative to the wall
It is moved axially between high-order and low level, in a high position, stretching rod extends except die cavity, is located at mould in the distal end of low level, stretching rod
Near bottom；
This method includes: in succession
In the process introducing crude green body in mold that a stretching rod high position carries out；
Process is blown in advance, and pre- process of blowing includes following operation:
Pre- blowing pressure fluid is injected into crude green body by blowing circuit in advance；
Stretching rod is set to be moved to low level from a high position；
Blow process comprising arrive by the blowing pressure fluid that blowing circuit injection pressure is higher than pre- blowing pressure
Operation in crude green body；And
Mechanical braking operations of the stretching rod in low level.
This method may additionally include the container decompression process after blowing process, in this case, open in decompression process
The mechanical braking operations of stretching rod are completed while dynamic.
The mechanical braking of stretching rod preferably carries out during at least part of blowing process.
In addition, stretching rod the mechanical braking operations of low level can start in:
Before pre- blowing process terminates,
At the end of pre- blowing process, or
After blowing process starting.
Mould bottom may be mounted to the stowed position that can be detached from die cavity at mould bottom relative to wall and the stretching position of mould bottom closed cavity
It is movable between setting；In this case, manufacturing method may include impact operation, and impact operation is blowing process at least
Make mould bottom mobile to its extended position from the stowed position at mould bottom during a part.In this case, to the system of stretching rod
Action spot allows stretching rod to increase under the thrust of mould bottom to prevent stretching rod from removing from mould bottom.
Secondly a kind of vessel making machine is also proposed, for utilizing plastic crude green body manufacture container, vessel making machine includes
Molding equipment, molding equipment are furnished with:
Mold is furnished with wall and mould bottom, and wall limits the die cavity with container type chamber, extends along main shaft, mould bottom is in wall
Lower end closed die cavity；
Injection device, has pre- blowing circuit and blowing circuit, and pre- circuit of blowing is furnished with pre- blowing pressure fluid
Source, blowing circuit are furnished with blowing pressure fluid source, and blowing pressure is higher than pre- blowing pressure；
Draw unit, with movable part, movable part includes stretching rod, and stretching rod can exist relative to the wall
It is moved axially between high-order and low level, in a high position, stretching rod extends except die cavity, is located at mould in the distal end of low level, stretching rod
Near bottom；
Control unit is programmed to control stretching rod from a high position to low level or in turn from low level to a high position and move,
And injection from pre- blowing circuit and blows the fluid in circuit to being placed in the crude green body in mold in succession for control；
In vessel making machine:
Draw unit has the mechanical brake controlled by control unit, and mechanical brake is equipped with actuator and is connected
In the brake block of actuator, brake block can be movable between releasing position and application position, and in releasing position, brake block is detached from
Movable part, in application position, brake block is contacted with movable part；
Control unit is programmed to control the system during fluid from blowing circuit is injected into crude green body
Motion block is mobile to its application position.
Detailed description of the invention
According to embodiment description, other objects and advantages of the present invention will be embodied with reference to the accompanying drawings
Come, in attached drawing:
Fig. 1 is the partial perspective cutaway view of molding equipment, and the molding equipment is furnished with draw unit, indicate stretching and
Before pre- blowing starting；
Fig. 2 is similar to Fig. 1, wherein molding equipment is shown during blowing process and stretching rod is in low level, and is justified
The enlarged detail portions figure on the distal end of stretching rod that centers is indicated in circle；
Fig. 3 is the horizontal section detail drawing of the molding equipment of the III-III section along Fig. 2, shows the machinery of movable part
Brake is furnished with brake block, and here, brake block is in releasing position；
Fig. 4 is the cross-sectional details figure according to Fig. 3 box IV to center on brake block one end；
Fig. 5 is similar to Fig. 4, shows brake block and is in application position, in the application position, brake block sticks on movable part
On the complementary portion of part；
Fig. 6 is line chart, shows change in location of the stretching rod during a complete molding cycle；Number is used on the line chart
Word indicates different container formation process and draw unit power supply or power-off process.
Specific embodiment
It shows in Fig. 1 and is made by stretch blow by plastics, especially PET (poly é thylene t é r é phtalate)
The molding equipment 1 of 3 container molding 2 of crude green body.Crude green body 3 can be crude injection preform (as in this example) or be
Intermediate receptacle obtained is operated by carrying out one or multi-channel preforming to crude preform.
In fact, molding equipment 1 and other similar molding equipment are installed along with the circulation conveying of the rotation of molding machine
On device.
Molding equipment 1 is automatically manipulated by control unit 4, and there is control unit 4 at least one to be furnished with the control of actuator
Device (such as industrial programmable automation controller API type: the initial of Aut-mate pr-grammable industriel
Abbreviation).
Firstly, each molding equipment 1 has mold 5, mold is furnished with wall 6 and mould bottom 9, and the wall 6 is limited with to be formed
The die cavity 7 of 2 type chamber of container extends along main shaft 8, and the mould bottom 9 is furnished with upper surface 10, which has container 2 to be formed
The type chamber of bottom.
Mold 5 is, for example, file clip-type, and for tool there are two half module 5A, 5B, the two half modules are hinged around a public hinge
Together, the two half modules are opened to allow successively to be discharged the container 2 of formation and introduce a crude green body 3, the crude green body 3 is pre-
Heating was first carried out in the thermal conditioning machine for being arranged in molding machine upstream.
Secondly, each molding equipment 1 has injection device 11, injection device has the nozzle 12 for limiting injection room 13.Spray
Mouth 12 is directed at mold 5 and installs, can be axial movable between disengaged position and bonding station relative to mold, in disengaged position, spray
12 break away from moulds of mouth is can not only be introduced into crude green body 3 into mold, but also the container 2 of formation can be discharged, and in bonding station, (Fig. 1 is extremely
Shown in 2), nozzle 12 hermetically sticks on mold 5 around crude green body 3, to ensure the internal flow of injection room 13 Yu crude green body 3
Connection.
In addition, injection device 11 has pre- blowing fluid circuit 14, pass through the pre- blowing electricity manipulated by control unit 4
Dynamic valve 16, fluidly connects injection room 13 with pre- blowing pressure fluid source 15.In fact, fluid is gas, such as empty
Gas.Pre- blowing pressure is, for example, between 5 to 10 bars.
In addition, injection device 11 has blowing fluid circuit 17, pass through the blowing motor-driven valve manipulated by control unit 4
19, fluidly connect injection room 13 with blowing pressure fluid source 18, wherein blowing pressure is higher than pre- blowing pressure.It is practical
On, fluid is air.Blowing pressure is, for example, between 20 to 40 bars.Finally, injection device 11, which has, removes air circuit 20, degasification
Circuit passes through the ventilation motor-driven valve 21 also manipulated by control unit 4, fluidly connects injection room 13 with free air.
Third, each molding equipment 1 have draw unit 22, and draw unit is furnished with:
Rack 23, is fixed on the circulating conveyor of molding machine, and substantially aligned mold 5 extends；In this example,
Rack is in U-shape on cross section；
Movable part 24 is furnished with balladeur train 25 and stretching rod 26, and stretching rod 26 is fixed on balladeur train 25 by proximal end 27, uses
Container 2 is kept in the axis 8 in forming process by the rounded distal 28 opposite with proximal end 27 along mold 5；
Motor 29 is connected in movable part 24, for ensuring that the movable part is mobile in some conditions.Electricity
Motivation 29 is connected to control unit 4, and control unit, which ensures to control by circuit 30, supplies alternating current to it.
As illustrated in fig. 1 and 2, it is axially extending to pass through nozzle 12 for stretching rod 26.It realizes to come between stretching rod 26 and nozzle 12
The leakproofness of autonomous source 15 and the fluid of secondary source 18, such as by being carried by nozzle 12 and regardless of stretching rod axial position
The dynamic seal being all steadily contacted with stretching rod 26.
Motor 29 is, for example, linear induction motor, comprising:
Linear stator 31, stator are fixed on rack 23, are supplied to electric current by circuit 30 to generate magnetic field, are controlling
It moves linearly under the control of unit 4 processed,
Line rotor 32 is fixed on balladeur train 25, installs in face of stator 31, carries a series of permanent magnets, these are forever
Long magnet is synchronously moved with stator field.
Therefore, be mounted to can be relative to rack 23 (thus relative to mold 5) under for balladeur train 25 (together with stretching rod 26)
Translation activity between column position:
High-order (Fig. 1), in the high position, stretching rod 26 completely disengages mold 5, or even in the crude green body being installed in mold 5
Except 3；
Low level (Fig. 2), in the low level, stretching rod 26 is accepted in mold 5, and distal end 28 is located near mould bottom 9,
(or in forming process) container 2 formed is sandwiched between mould bottom 9 and the distal end 28 of stretching rod 26.
Straight-line guidance to movable part 24 relative to rack 23 ensured by one or more clips 33, described one
A or multiple clips 33 are fixed on balladeur train 25 and cooperate with the one or more guide rails 34 for being fixed on rack 23.This guiding foot
Enough accurately air gaps 35 to be kept constant between stator 31 and rotor 32.
4th, molding equipment 1 has mechanical brake 36, and movable part 24 can be made indefinite relative to the fixation of rack 23,
To keep stretching rod 26 fixed relative to mold 5 and mould bottom 9.
Embodiment according to Fig.3, brake 36 have brake block 37, and brake block is mounted to can be in application position
It is movable between (Fig. 5) and releasing position (Fig. 4), in application position, brake block 37 and it is fixed on movable part 24 (more accurately
Say and be fixed on balladeur train 25) guide block (piste) 38 carry out plane contact, with the joint surface between brake block 37 and guide block 38
Place generates the frictional force for preventing them from mutually moving, and in releasing position, brake block 37 is detached from guide block 38.
Brake 36 has actuator 39, and actuator 39 is configured to the control according to control unit 4, sets brake block 37
A position or another location in its position.The actuator 39 can be it is electronic, still, preferred reality according to Fig.3,
Mode is applied, actuator 39 is fluid (hydraulic or pneumatic) formula.More precisely, in an illustrated embodiment, actuator 39 is in single
The form of pressurized strut is acted on, there is cylinder 40 and bar 41, brake block 37 is installed on bar.
Bar 41 is fixed on piston 42, piston be mounted to can in cylinder 40 between application position and releasing position (Fig. 3)
Sliding, the application position correspond to the application position of brake block 37, and the releasing position corresponds to the release position of brake block 37
It sets.
Cylinder 40 fixed (fixing especially by screw) is in rack 23, on such as Shelf External.Opening 43 is then opened
In rack 23, to allow bar 41 to pass through.
Cylinder 40 is closed by antetheca 44 and rear wall 45.Bar 41 sealingly extends through antetheca 44, and room 46 is limited together with antetheca,
It can injection pressure fluid in room.Room 46 by the motor-driven valve 48 that is controlled by control unit 4, with pressure fluid (such as air or
Oil) source 49 is in fluid communication.In an illustrated embodiment, fluid is air, and motor-driven valve 48 is three way type: one leads to and is connected to
Power supply 49, two-way are connected to room 46, and threeway is connected to free air.
At least one reset spring 47 is disposed between piston 42 and rear wall 45, here, reset spring compression work,
In the embodiment shown, reset spring 47 is compound spring, have double coaxial spring coil, thus increase spring rate and
It is applied to the compressing force on piston 42.(i.e. when control unit 4 makes room 46 by motor-driven valve 48 when there is no pressure in room 46
When being communicated to free air), reset spring 47 makes piston 42 (thus making brake block 37) be placed in its application position.On the contrary,
Then cause piston 42 (to cause to brake the fluid injection carried out in room 46 by what motor-driven valve 48 controlled by control unit 4
Block 37) it is converted in the case where resisting the reset force that spring 47 applies to its releasing position.
Braking guide block 38 can be fixed on balladeur train 25 in the form of the attachment for being installed on movable part 24.According to figure
3, embodiment shown in 4 and 5, guide block 38 is T-shaped, has core 50 and plate 51, and guide block 38 is fixed on balladeur train by core 50
On 25, plate 51 is laterally extended relative to core 50.
Brake block 37 has end face 52, and in application position, end face 52 is resisted against on plate 51 to apply frictional force to plate.
About material, brake block 37 can be with composite material or even ceramic as disk brake friction wafer
It is made, composite material includes organic base-material added with fiber, especially glass fibre or carbon fiber.As for guide block 38, it as
Brake disc is the same, and with steel, cast iron, carbon fibre composite or even ceramics are made.
By crude green body 3 (especially preform) manufacture container 2, this is included in mold first and is first in open position, then
In the close position and stretching rod 26 is in the front travel introducing crude green body 3 in mold carried out under high-order (Fig. 1).
The pre- blowing process 100 of crude green body 3 is then set comprising following operation:
Pre- blowing pressure fluid is injected into crude green body 3；It is opened for this purpose, control unit 4 controls pre- blowing motor-driven valve 16, with
Pre- blowing pressure fluid source 15 is in fluid communication with injection room 13 (thus with crude green body 3)；
During the decline process 110 of stretching rod 26, stretching rod 26 is made to be moved to its low level (figure from its high position
2)；For this purpose, the control of control unit 4 powers to motor 29.
Pre- blowing causes crude green body 3 to expand, until crude green body is only partially contacted with mold wall 6 and mould bottom 9, pre- blowing pressure
It is insufficient to allow crude green body 3 to be sticked on wall 6 completely.In other words, it is insufficient to allow crude green body to form.
With the resultant force (white arrow in the thin portion circle of Fig. 2) of R mark resistance, these resistances are by forming process
In the distal end 28 of stretching rod 26 extended in crude green body 3, any convex shoulder (or stage) that may have to it when necessary apply
Pressure (black arrow in the thin portion circle of Fig. 2) and generate.
As shown in fig. 6, even if blowing process 100 and the decline process 110 of stretching rod 26 are overlapping but their own in advance
Starting and end time is not necessarily overlapped.In particular, the decline process 110 of stretching rod 26 is advantageously in pre- blower
Start before sequence 100, then starts pre- blowing process when the distal end of stretching rod 26 28 reaches the bottom of (passing through estimation) crude green body 3
100, it otherwise can generate 3 off-axis of crude green body.During the decline process 110 of stretching rod 26, brake 36, which is maintained at, to be released
Put position.
The blowing process 200 of crude green body 3 is then set comprising following operation:
Blowing pressure fluid is injected in crude green body 3；It closes and controls for this purpose, control unit 4 controls pre- blowing motor-driven valve 16
System blowing motor-driven valve 19 is opened, so that blowing pressure fluid source 18 and injection room 13 (thus with crude green body 3) are in fluid communication；
During so-called locking process 210 of stretching rod 26, make stretching rod 26 in the fixed (figure of its low level
2), to make the material being interposed between stretching rod 26 and mould bottom 9 be held in 2 bottom center of container, and the material is avoided to blow
Pressing pressure effect is lower to occur any sliding.
Blowing sticks on 3 material tight of crude green body on the wall 6 of mold 5 and mould bottom 9, so that container 2 be made to form.
Blowing motor-driven valve 19 is kept it turning on during the scheduled time (being actually zero point several seconds), during this time period,
Material experience contacts with wall 6, cools down (or phase inverse annealing, this, which depends on wall 6, will cool down or to heat), is intended to make
Material solidification, thus fixed 2 shape of container.
When stretching rod 26 touches mould bottom 9 (by 2 material of container being interposed between stick and mould bottom) --- control is single
Member 4 is detectable or estimates this contact, and the controller control for being programmed control thus stops powering to motor 29, to keep away
Exempt from its any overheat.Therefore, mechanical braking operations of the setting stretching rod 26 in low level.This mechanical braking is achieved: passing through
Activation brake 36 is to cause brake block 37 to be transformed into application position.It is produced due to being contacted with braking guide block 38 on brake block 37
Resultant force R described in raw Friction Compensation, it is sufficient to ensure that stretching rod 26 is fixed during blowing.
The locking process 210 of the activation starting stretching rod 26 of brake 36.According to a kind of embodiment, process 210 is locked
Starting with blow process 200 starting carry out simultaneously.But the starting of the locking process 210 of stretching rod 26 and blowing process
200 starting be not it is inevitable carry out simultaneously because stretching rod 26 with the contact at mould bottom 9 is comparable blows the end of process 100 more in advance
It is early to carry out, or carry out later as shown in Figure 6.
Therefore, in the case where carrying out later, as shown in fig. 6, starting (the i.e. control blowing motor-driven valve of blowing process 200
19 open) then prior to stretching rod 26 the locking process 210 of low level starting.In view of motor-driven valve (especially blowing motor-driven valve
19) response time and time (0. more than zero second) needed for establishing blowing pressure in crude green body 3, the locking of stretching rod 26
The beginning of process 210 is only apparent relative to the delay of the beginning of blowing process 200.Since the stroke of brake block 37 is short,
Its conversion from releasing position to application position is also extremely short (about 0. 01 seconds), so that the pressure actually in crude green body 3
Before reaching blowing pressure, stretching rod 26 is effectively fixed in low level.In other words, resultant force R, which will not reach, is enough to make to stretch
Stick 26 is from the raised numerical value of its low level.
In modification, when stretching rod 26 reaches mould bottom 9 before blowing process 100 in advance terminates, blowing process 200
Starting can be later than the starting of the locking process 210 of stretching rod 26.
As can be seen that stretching rod 26 during blowing not by mechanical braking in the case where, need during blowing keep pair
Stator 31 is fully powered-on, this can cause stator 31 quickly to overheat, and since the gear of stretching rod 26 leans against on mould bottom 9, rotor 32 can then be protected
It holds and is locked in place.
But, it is contemplated that it keeps powering to 31 part of stator during locking process 210, to stretch for 36 Duis of brake
The mechanical force that stick 26 applies increases electromagnetism component (and this will not cause stator 31 to overheat).
The locking process 210 of stretching rod 26 continues during at least part of blowing process 200.Reality shown in Fig. 6
It applies in example, locking process 210 terminates simultaneously with blowing process 200, and control unit 4 controls (consider the response time) simultaneously braking
Device 36 rotates and controls blowing motor-driven valve 19 to its releasing position and closes.
In modification, locking process 210 can terminate before blowing process 200 terminates.In this case, control is single
Control brake 36 is rotated to its releasing position and is controlled to the power supply of stator 31 so that stretching rod 26 rises member 4 ahead of time.Because closing
Power R helps increase stretching rod, so stator 31 need not completely power, so as to save the electric energy of the consumption of draw unit 22.
As long as the pressure in crude green body 3 (followed by container 2) is equal to blowing pressure, stretching rod 26 can be remained stationary.
According to a kind of specific embodiment, mould bottom 9 is mounted to that the stowed position of die cavity 7 can be detached from mould bottom 9 relative to wall
It is movable between the extended position of 9 closed cavity 7 of mould bottom, to allow to be rushed during at least part of blowing process
(boxage) operation is hit, impact operation is to keep mould bottom mobile to its extended position from the stowed position at mould bottom 9, to utilize
Mould bottom 9 increase to material the assisting tension of its mechanical strength.In this case, the brake arrangement of stretching rod 26 is at foot
To prevent stretching rod 26 from removing from mould bottom 9, while allowing to make stretching rod 26 in impact process under the thrust at mould bottom 9
It increases.
It is decompression process 300 after blowing process 200 comprising following operation:
It is connected to container 2 with free air；For this purpose, the control blowing motor-driven valve 19 of control unit 4 is closed and is ventilated electronic
Valve 21 is opened；
When necessary, inject fluid in container 2 by stretching rod 26 (in container and while air communication) come for appearance
2 scavenging of device, for this purpose, stretching rod 26 is furnished with lateral (i.e. perpendicular to main shaft 8) through-hole.In this case, injection device 11 has
There are scavenging circuit and motor-driven valve, the scavenging circuit includes scavenging pressure fluid source, and scavenging pressure is equal to or less than blowing pressure
And be greater than pre- blowing pressure, the motor-driven valve is controlled by control unit 4 so that scavenging fluid source and stretching rod 26 (thus with appearance
Device 2) connection；
In the raising process 310 of stretching rod 26, keep stretching rod 26 mobile from its low level to its high position, to allow opening
Container 2 is discharged from mold 5 after mould.
If container and air communication is only arranged, referred to as degasification, the pressure in container 2 is quick due to pressure balance
Reach atmospheric pressure.In this case, as shown in fig. 6, the raising of stretching rod 26 can start simultaneously with degasification.If setting
Scavenging, then scavenging will carry out a predetermined time segment (several seconds of 0. 0) before the interruption.In this case, it stretches
The raising of stick 26 postpones to allow scavenging, interrupts scavenging then to start the raising of stretching rod.Then, keep ventilation so as to
Last degasification is carried out to container 2.
In order to which container 2 is discharged, control unit 4 controls the raising of nozzle 12, the die sinking of mold 5 and ventilation motor-driven valve 21
Closing.Container 2 is discharged, and the period can restart.
Claims (11)
1. a kind of manufacturing method for container, for utilizing plastic crude green body (3) manufacture container (2), molding in molding equipment (1)
Equipment is furnished with:
Mold (5) is furnished with wall (6) and mould bottom (9), and wall limits the die cavity (7) with container (2) type chamber, along main shaft (8)
Extend, lower end closed die cavity (7) of the mould bottom in wall (6)；
Injection device (11) has pre- blowing circuit (14) and blowing circuit (17), and pre- circuit of blowing is equipped with pre- blowing pressure
Power fluid source (15), blowing circuit are furnished with blowing pressure fluid source (18), and blowing pressure is higher than pre- blowing pressure；
Draw unit (22), with movable part (24), movable part includes stretching rod (26), and stretching rod can be relative to institute
It states wall (6) to move axially between high-order and low level, in a high position, stretching rod (26) extends except die cavity (7), in low level, draws
The distal end (28) for stretching stick (26) is located near mould bottom (9)；
Manufacturing method for container includes: in succession
In the high-order process introducing crude green body (3) in mold (5) carried out of stretching rod (26)；
Process (100) are blown in advance, pre- process of blowing includes following operation:
Pre- blowing pressure fluid is injected in crude green body (3) by blowing circuit (14) in advance；
Stretching rod (26) is set to be moved to low level from a high position；
It blows process (200) comprising be higher than the blowing pressure stream of pre- blowing pressure by blowing circuit (17) injection pressure
Body is to the operation in crude green body (3)；
It is characterized in that, manufacturing method for container includes mechanical braking operations of the stretching rod (26) in low level.
2. manufacturing method for container according to claim 1, which is characterized in that the mechanical braking operations of stretching rod (26) are being blown
It is carried out during at least part of process (200) processed.
3. manufacturing method for container according to claim 1, which is characterized in that the mechanical braking operations of stretching rod (26) are pre-
Blowing process (100) starts before terminating.
4. manufacturing method for container according to claim 2, which is characterized in that the mechanical braking operations of stretching rod (26) are pre-
Blowing process (100) starts before terminating.
5. manufacturing method for container according to claim 1, which is characterized in that the mechanical braking operations of stretching rod (26) are pre-
Start at the end of blowing process (100).
6. manufacturing method for container according to claim 2, which is characterized in that the mechanical braking operations of stretching rod (26) are pre-
Start at the end of blowing process (100).
7. manufacturing method for container according to claim 1, which is characterized in that the mechanical braking operations of stretching rod (26) are being blown
Start after process (200) starting processed.
8. manufacturing method for container according to any one of claim 1 to 7, which is characterized in that manufacturing method for container includes
The decompression process of container (2) after blowing process；Also, it is being depressured the machine that stretching rod (26) are completed while process starting
Tool brake operating.
9. manufacturing method for container according to any one of claim 1 to 7, which is characterized in that mould bottom (9) are mounted to can phase
Activity between the stowed position of die cavity (7) and the extended position of mould bottom (9) closed cavity is detached from mould bottom for wall (6), it is described
Manufacturing method for container then include blow process (200) at least part during make mould bottom (9) from stowed position to stretch out position
Set mobile operation.
10. manufacturing method for container according to claim 8, which is characterized in that mould bottom (9) are mounted to can be relative to wall (6)
Activity between the stowed position of die cavity (7) and the extended position of mould bottom (9) closed cavity, the vessel fabrication side are detached from mould bottom
Rule makes mould bottom (9) mobile to extended position from stowed position behaviour during including at least part for blowing process (200)
Make.
11. a kind of vessel making machine, for utilizing plastic crude green body (3) manufacture container (2), vessel making machine includes that molding is set
Standby (1), molding equipment is furnished with:
Mold (5) is furnished with wall (6) and mould bottom (9), and wall limits the die cavity (7) with container (2) type chamber, along main shaft (8)
Extend, lower end closed die cavity (7) of the mould bottom in wall (6)；
Injection device (11) has pre- blowing circuit (14) and blowing circuit (17), and pre- circuit of blowing is equipped with pre- blowing pressure
Power fluid source (15), blowing circuit are furnished with blowing pressure fluid source (18), and blowing pressure is higher than pre- blowing pressure；
Draw unit (22), with movable part (24), movable part includes stretching rod (26), and stretching rod can be relative to institute
It states wall (6) to move axially between high-order and low level, in a high position, stretching rod (26) extends except die cavity (7), in low level, draws
The distal end (28) for stretching stick (26) is located near mould bottom (9)；
Control unit (4) is programmed to control stretching rod (26) from a high position to low level or in turn from low level to Gao Weiyi
It is dynamic, and injection from pre- blowing circuit and blows the fluid in circuit into the crude green body (3) being placed in mold (5) in succession for control；
It is characterized by:
Draw unit (22) has the mechanical brake (36) controlled by control unit (4), and mechanical brake is furnished with actuator
(39) and it is fixed on the brake block (37) of actuator (39), brake block can be movable between releasing position and application position, is releasing
Position is put, brake block (37) is detached from movable part (24), and in application position, brake block (37) is contacted with movable part (24)；
Control unit (4) is programmed to control during the fluid for coming from blowing circuit (17) is injected into crude green body (3)
The brake block (37) is mobile to its application position.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1462008A FR3029447B1 (en) | 2014-12-05 | 2014-12-05 | PROCESS FOR FORMING CONTAINERS WITH BRAKING OF A STRETCH ROD DURING BLOWING |
| FR1462008 | 2014-12-05 | ||
| PCT/FR2015/053269 WO2016087761A1 (en) | 2014-12-05 | 2015-12-01 | Method for forming containers, with braking of a stretching pin during blowing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107000299A CN107000299A (en) | 2017-08-01 |
| CN107000299B true CN107000299B (en) | 2019-08-06 |
Family
ID=52392148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580065578.8A Expired - Fee Related CN107000299B (en) | 2014-12-05 | 2015-12-01 | The receptacle-forming processes of stretching rod are braked during blowing |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3227083A1 (en) |
| CN (1) | CN107000299B (en) |
| FR (1) | FR3029447B1 (en) |
| WO (1) | WO2016087761A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3062591B1 (en) * | 2017-09-08 | 2019-04-05 | Sidel Participations | DEVICE AND METHOD FOR BLOWING |
| FR3088232B1 (en) * | 2018-11-08 | 2020-10-16 | Sidel Participations | METHOD FOR MANUFACTURING A PLASTIC CONTAINER. |
| DE102020118662A1 (en) * | 2020-07-15 | 2022-01-20 | Khs Corpoplast Gmbh | Method for controlling a drive of a stretching rod of a device for manufacturing containers |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272023Y (en) * | 2008-09-25 | 2009-07-15 | 汪祥建 | Sealing apparatus of plastic stretch blow molding machine |
| CN101758615A (en) * | 2009-05-17 | 2010-06-30 | 柳州市精业机器有限公司 | Double-station reciprocating rotary type injection stretch blow hollow forming machine |
| WO2011154326A1 (en) * | 2010-06-09 | 2011-12-15 | Norgren Gmbh | Stretch blow moulding system using proportional valves |
| CN103158245A (en) * | 2011-12-14 | 2013-06-19 | 技术设计工程股份有限公司 | Blowing machine valve |
| CN103547434A (en) * | 2011-05-19 | 2014-01-29 | 西德尔合作公司 | Method for manufacturing containers, including an anticipated boxing operation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2662631B3 (en) * | 1990-05-31 | 1992-09-04 | Dynaplast Sa | MACHINE FOR THE BLOWING OF PET BI-ORIENTED PACKAGING AS WELL AS THE BLOWING PROCESS IMPLEMENTED. |
| FR2798093B1 (en) * | 1999-09-03 | 2001-11-30 | Sidel Sa | ROTARY DRAWING-BLOWING MACHINE WITH MAGNETIC DRAWING ROD CONTROL |
| FR2943941B1 (en) * | 2009-04-02 | 2011-04-22 | Sidel Participations | MOLDING UNIT WITH PILOTED TUYERE |
| EP2675606B1 (en) * | 2011-02-15 | 2019-12-04 | Discma AG | Reverse stretch rod for machine hygiene and processing |
-
2014
- 2014-12-05 FR FR1462008A patent/FR3029447B1/en not_active Expired - Fee Related
-
2015
- 2015-12-01 EP EP15810691.4A patent/EP3227083A1/en not_active Withdrawn
- 2015-12-01 WO PCT/FR2015/053269 patent/WO2016087761A1/en active Application Filing
- 2015-12-01 CN CN201580065578.8A patent/CN107000299B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201272023Y (en) * | 2008-09-25 | 2009-07-15 | 汪祥建 | Sealing apparatus of plastic stretch blow molding machine |
| CN101758615A (en) * | 2009-05-17 | 2010-06-30 | 柳州市精业机器有限公司 | Double-station reciprocating rotary type injection stretch blow hollow forming machine |
| WO2011154326A1 (en) * | 2010-06-09 | 2011-12-15 | Norgren Gmbh | Stretch blow moulding system using proportional valves |
| CN103547434A (en) * | 2011-05-19 | 2014-01-29 | 西德尔合作公司 | Method for manufacturing containers, including an anticipated boxing operation |
| CN103158245A (en) * | 2011-12-14 | 2013-06-19 | 技术设计工程股份有限公司 | Blowing machine valve |
Also Published As
| Publication number | Publication date |
|---|---|
| FR3029447A1 (en) | 2016-06-10 |
| CN107000299A (en) | 2017-08-01 |
| WO2016087761A1 (en) | 2016-06-09 |
| EP3227083A1 (en) | 2017-10-11 |
| FR3029447B1 (en) | 2016-12-09 |
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