CN106061709B - Blow molding apparatus - Google Patents
Blow molding apparatus Download PDFInfo
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- CN106061709B CN106061709B CN201480076433.3A CN201480076433A CN106061709B CN 106061709 B CN106061709 B CN 106061709B CN 201480076433 A CN201480076433 A CN 201480076433A CN 106061709 B CN106061709 B CN 106061709B
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- mouth
- blow molding
- molding apparatus
- liquid
- gas
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- 238000000071 blow moulding Methods 0.000 title claims description 83
- 210000000214 Mouth Anatomy 0.000 claims abstract description 184
- 239000007788 liquid Substances 0.000 claims abstract description 135
- 238000006073 displacement reaction Methods 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims description 43
- 239000012530 fluid Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 4
- 230000000994 depressed Effects 0.000 claims 1
- 230000002093 peripheral Effects 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 229910021186 PFa Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 210000003128 Head Anatomy 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002530 poly[4-(4-benzoylphenoxy)phenol] polymer Polymers 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 210000001124 Body Fluids Anatomy 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 108091006028 chimera Proteins 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005026 oriented polypropylene Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
It is set in advance as the advance pressure store of the gas displacement gas cylinder (35) to outside mouth and closes the state of the outer gas displacement gas cylinder switch valve (V3) of mouth, when supplying pressurized liquid (L) to bottle base (PF) via blow nozzle (13) acting plunger pump (31) and opening seal (15), open the outer gas displacement gas cylinder switch valve (V3) of mouth and the pressure for being stored in the outer gas displacement gas cylinder (35) of mouth is put on to the liquid (L) for being supplied to bottle base (PF).
Description
Technical field
A kind of blow molding apparatus the present invention relates to bottle base blow molding by bottomed tube for bottle, particularly
The blow molding apparatus of the pressure fluid for carrying out blow molding is used as using liquid.
Background technology
By the bottle of oriented polypropylene (OPP) system or the bottle (PET of polyethylene terephthalate (PET) system
Bottle the bottle of the resin-made representated by) is used in the various uses such as beverage is used, food is used, is used for cosmetic.Such bottle
Body be typically by be formed as by injection molded etc. bottomed tube resin-made bottle parison heating to drawing effect can be shown
Temperature, and in this condition using blow molding apparatus carry out biaxial stretch blow molding, so as to form predetermined shape.
It is known to have using pressurized liquid to substitute gas-pressurized as being fed to bottle base as blow molding apparatus
The blow molding apparatus of interior pressure fluid.In the case, by using beverage, cosmetics, medicine etc. eventually as product
And liquid of the content liquid of bottle as pressurization is filled into, the process to bottle filling content liquid can be omitted, and simplify it
The composition of production process and/or blow molding apparatus.
For example, having recorded following blow molding apparatus in patent document 1, the blow molding apparatus possesses：Blow molding
With metal die, the bottle base for being heated to stretchable temperature is installed；Blow nozzle, it is embedded in the mouth tube portion of bottle base, bottle base
It is installed on metal die；Fluid under pressure supply department, pressurized liquid is supplied to bottle base via blow nozzle；And stretch rod,
Move freely along the vertical direction, wherein, bottle base is stretched along longitudinal direction (axial direction) by stretch rod, while supply and added into bottle base
The liquid of pressure makes bottle base, and transversely (radial direction) is stretched, and bottle base is configured to the bottle of the shape along metal die die cavity.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2013-208834 publications
The content of the invention
Technical problem
In blow molding apparatus as described above, as pressurize and supplying content liquid fluid under pressure supply department,
The plunger pump of the servo plunger type for example by servo motor driven can be used.By using such plunger pump as pressurized fluid
Body supply department, can precision a certain amount of content liquid is filled into the bottle as product well.
In such blow molding apparatus, in order to improve to bottle (bottle) obtained from bottle base progress blow molding
Formability (plastic property), it is important that the liquid pressure rise of bottle base is supplied to by plunger pump in a short time and is pressed as defined in
Power.
However, for the plunger pump of servo plunger type, make Time Dependent of the liquid pressure rise as defined in needed for pressure in making
The ability of the servo motor of plunger pump action, therefore, if making servo motor at full throttle be acted, herein can not can
More than power shorten the time, therefore the formability that can not fully improve bottle be present.
The present invention is in view of what such problem was completed, and its object is to provide a kind of blow molding apparatus, the blowing
Building mortion can shorten more than the ability of fluid under pressure supply department makes the liquid pressure rise for being supplied to bottle base pressure as defined in
The required time, and the formability of bottle can be improved.
Technical scheme
The blow molding apparatus of the present invention is that the bottle base of the bottomed tube to the metal die for being installed on blow molding supplies
The blow molding apparatus for the shape answered pressurized liquid and the bottle base is configured to the die cavity along above-mentioned metal die, it is above-mentioned to blow
Modeling building mortion possesses：Blow nozzle, it is embedded in the mouth tube portion of above-mentioned bottle base；Seal, switch above-mentioned blow nozzle；Pressurized fluid
Body supply department, above-mentioned blow nozzle is connected to via liquid flow path；Accumulator, branch it is connected to aforesaid liquid stream；And
Accumulator switch valve, it is arranged between aforesaid liquid stream and above-mentioned accumulator, wherein, it is set in advance as in advance storing pressure
In above-mentioned accumulator and the state of above-mentioned accumulator switch valve is closed, above-mentioned fluid under pressure supply department is acted and is opening
State seal and via above-mentioned blow nozzle to above-mentioned bottle base supply pressurized liquid when, open above-mentioned accumulator switch valve,
The pressure for being stored in above-mentioned accumulator is put on to the liquid for being supplied to above-mentioned bottle base.
Preferably, in the blow molding apparatus of the present invention, from above-mentioned seal will be opened to being supplied to above-mentioned bottle
The liquid of base turn into peak pressure before untill time, open above-mentioned accumulator switch valve.
Preferably, in the blow molding apparatus of the present invention, above-mentioned blow nozzle is being closed by above-mentioned seal, and beat
In the state of having driven above-mentioned accumulator switch valve, act above-mentioned fluid under pressure supply department, then, by closing above-mentioned accumulator
Switch valve, so as to which pressure is had previously been stored in into above-mentioned accumulator.
Preferably, in the blow molding apparatus of the present invention, possess：Pressue device, above-mentioned accumulator is driven, by using
The pressue device drives above-mentioned accumulator pressure is stored in the accumulator in advance.
Preferably, in the blow molding apparatus of the present invention, possess：The mouth external pressurized gas compartment, on being installed on
The periphery of the mouth tube portion of the above-mentioned bottle base of metal die is stated, above-mentioned accumulator is made up of gas displacement gas cylinder outside mouth, outside above-mentioned mouth
One end of gas displacement cylinder is connected to aforesaid liquid stream, and the other end is connected to above-mentioned mouth external pressurized via pressurization stream
Use the gas compartment.
Preferably, in the blow molding apparatus of the present invention, gas pressurized is provided with outside mouth with opening in above-mentioned pressurization stream
Valve is closed, the outer gas pressurized of above-mentioned mouth is closed with switch valve when pressure is had previously been stored in into above-mentioned accumulator, above-mentioned opening
Seal and be opened when supplying pressurized liquid to above-mentioned bottle base.
Preferably, in the blow molding apparatus of the present invention, above-mentioned fluid under pressure supply department is the plunger of servo plunger type
Pump.
Technique effect
According to the present invention, store pressure in advance in accumulator, when supplying pressurized liquid to bottle base, due to except
Outside the action of fluid under pressure supply department, the pressure for being stored in accumulator is also put on into liquid, so as to the liquid pressing,
So the time for making liquid pressure rise as defined in needed for pressure can be shortened more than the ability of fluid under pressure supply department, with only profit
The situation of liquid pressing is compared with fluid under pressure supply department, it is possible to increase the shaping to bottle obtained from bottle base blow molding
Property.
Brief description of the drawings
Fig. 1 is the explanation figure for the blow molding apparatus for schematically illustrating an embodiment of the invention.
Fig. 2 is by the amplification profile of the filling head amplification display shown in Fig. 1.
Fig. 3 is to show that outside mouth gas displacement gas cylinder stores the figure of the state of gas pressure outside mouth.
Fig. 4 is to show that gas displacement gas cylinder is stored outside mouth after gas pressure outside mouth, and the shape of liquid is supplied to plunger pump
The figure of state.
Fig. 5 is to show to carry out the figure of the state of blow molding to the pressurized liquid of bottle base supply.
Fig. 6 be show by the present application and comparative example be supplied to bottle base liquid reach peak pressure untill time and
The figure for the result that the evaluation of the formability of bottle at that time is compared.
Fig. 7 be show to be supplied to bottle base liquid reach peak pressure untill time and the outer gas pressure of mouth between relation
Figure.
Symbol description
1：Metal die
2：Die cavity
10：Nozzle unit
11：Fill head
12：Holding member
13：Blow nozzle
14：Feeding cylinder portion
14a：Introducing port
14b：Outlet
14c：Sealing surface
14d：Supply orifice
14e：Connector
15：Seal
15a：Bearing surface
16：Axis body
17：Stretch rod
18：Guide body
21：Support sector
31：Plunger pump (fluid under pressure supply department)
31a：Cylinder
31b：Plunger
31c：Electro-motor
32：Liquid circulation portion
33：Liquid flow path
34：Hydraulic pressure feed path
35：The outer gas displacement gas cylinder (accumulator) of mouth
35a：Cylinder
35b：Piston
36：Pressurize stream
37：Control device
38a：Pressure sensor
38b：Pressure sensor
PF：Bottle base
PFa：Main part
PFb：Mouth tube portion
PFc：Neck ring
Fs：Feed path
P1：Pipe arrangement
L：Liquid
R1：Pipe arrangement
R2：Pipe arrangement
R3：Pipe arrangement
CR：Peripheral passage
V1：Peripheral passage switch valve
V2：Peripheral passage switch valve
V3：The outer gas displacement gas cylinder switch valve (accumulator switch valve) of mouth
V4：The outer gas pressurized switch valve of mouth
S：The mouth external pressurized gas compartment
Embodiment
Hereinafter, more specifically illustration and explanation are carried out to the present invention referring to the drawings.
As shown in Figure 1 and Figure 2, the blow molding apparatus of an embodiment of the invention has the metal of blow molding
Mould 1.The die cavity 2 of the metal die 1 is in doleiform shape, and opening upward is provided with the upper surface of metal die 1.It is though not detailed
Illustrated, but metal die 1 can mold to the left and right, can be by the product after shaping from metal by opening metal die 1
Taken out in mould 1.
It can be installed in metal die 1 and blow molding is carried out by the blow molding apparatus to form the bottle base PF of bottle.
Show to be provided with bottle base PF state in Fig. 1, Fig. 2 in metal die 1.As bottle base PF, can use for example, by poly- third
The resin materials such as alkene (PP) are integrally formed as bottomed cylindrical, the upper end one at this as the main part PFa of test tube shape
The mouth tube portion PFb of cylindrical shape is set body, and be provided integrally with mouth tube portion PFb bottom neck ring PFc shape
Bottle base.Bottle base PF is installed on metal die 1 as follows, i.e. die cavity 2 interior edge types of its main part PFa in metal die 1
The axle center configuration of chamber 2, and neck ring PFc is abutted with the upper surface of metal die 1 and is projected into metal die as mouth tube portion PFb
The state of 1 outside (being top in Fig. 1, Fig. 2).
As shown in figure 1, in the upside of metal die 1, relatively move relative to metal die 1 and set freely along the vertical direction
It is equipped with nozzle unit 10.The generally tubular of nozzle unit 10, and possess：Fill head 11 and torn open with cylinder (cartridge) formula
Unload the support sector 21 for being screwed the filling head 11 freely.
As shown in Fig. 2 filling head 11 possesses：Holding member 12, blow nozzle 13 and Feeding cylinder portion 14.
Holding member 12 is formed as the bulk that the heart wherein possesses the through hole penetrated along the vertical direction, and in its through hole
Inner side the blow nozzle 13 of tubular is installed.If nozzle unit 10 drops to lower end, the bottle base of metal die 1 is installed on
PF mouth tube portion PFb is configured to the inside of through hole, and blow nozzle 13 is chimeric with mouth tube portion PFb inner side, and neck ring
PFc is sandwiched between the lower end of holding member 12 and the upper surface of metal die 1, and bottle base PF is with perpendicular to the peace of metal die 1
Dress posture is kept.
Feeding cylinder portion 14 is configured to the cylindric portion for possessing vertically extending feed path Fs inside it
Part, it is fixed on the upper end of holding member 12 and can be together relatively moved up and down relative to metal die 1 with holding member 12.
The upper end side in Feeding cylinder portion 14 is provided with the introducing port 14a being connected with feed path Fs, and the lower end side in Feeding cylinder portion 14 is set
There is the outlet 14b being connected with feed path Fs.In addition, the lower end of the inner surface in the formation feed path Fs in Feeding cylinder portion 14
The diameter diminishingly sealing surface 14c of inclined conical surface-shaped downwards is provided with, is provided with sealing surface 14c axle center
The supply orifice 14d for making feed path Fs be open downwards and be connected with blow nozzle 13.
It is configured with feed path Fs inside for switching the supply orifice 14d i.e. seal 15 of blow nozzle 13.Sealing
Body 15 is formed as short cylindrical shape, and the peripheral edge portion in its lower surface is provided with the bearing surface 15a of taper.Bearing surface 15a has
Have with sealing surface 14c identicals angle of inclination, can be bonded with sealing surface 14c.In feed path Fs inside along feed path
Fs axle center is configured with the bar-shaped axis body 16 of elongated cylinder, and the axis body 16 penetrates the upper end in Feeding cylinder portion 14 fluid tightly, and
Supported by support sector 21 in a manner of being moved along the vertical direction freely relative to filling head 11 and support sector 21.Seal 15 is same
The lower end of axis body 16 is fixed on axle, is together freely up and down moved in feed path Fs inside with the axis body 16.In axis body 16
When being moved to the stroke end of lower section, the bearing surface 15a of seal 15 supports with the sealing surface 14c of the bottom in Feeding cylinder portion 14
Connect, blow nozzle 13 is closed by seal 15.On the other hand, when seal 15 and axis body 16 are together moved upward, sealing
The bearing surface 15a of body 15 leaves from the sealing surface 14c in Feeding cylinder portion 14, and blow nozzle 13 is opened.
Axis body 16 is in hollow, and stretch rod 17 is sliding freely provided with the inside of it.Stretch rod 17 is relative to the edge of axis body 16
It can axially relatively move, its lower end protrudes from the lower end of seal 15.As shown in double dot dash line in Fig. 2, stretch rod 17 pass through to
Lower section is moved, and can stretch bottle base PF along longitudinal direction (axial direction).
It should illustrate, in the lower end of seal 15, in order to guide stretch rod 17, and be fixed with short cylinder shape, polyether-ether-ketone
(PEEK) guide body 18 of resin-made.
As shown in figure 1, nozzle unit 10 is connected with plunger pump 31 and liquid circulation portion 32 as fluid under pressure supply department.
Plunger pump 31 possesses cylinder 31a and the plunger 31b installed freely is axially moveable in cylinder 31a, and it is arranged
Gas port is connected to the introducing port 14a in Feeding cylinder portion 14 by pipe arrangement P1.That is, plunger pump 31 is via by pipe arrangement P1 and feed path Fs
The liquid flow path 33 of composition is connected to blow nozzle 13.Therefore, plunger pump 31 can will be pressurized by plunger 31b action
Liquid L is supplied to blow nozzle 13 via liquid flow path 33.
In the illustrated case, plunger pump 31 is possesses electro-motor (servo motor) 31c servo as driving source
Plunger type, plunger 31b are driven by electro-motor 31c, in cylinder 31a interior edge axial actions.
Liquid circulation portion 32 has following function：While from pipe arrangement R1 again liquid make-up L while liquid L is adjusted into pre-
Fixed temperature is simultaneously supplied to plunger pump 31 via pipe arrangement R2, at the same time, while liquid L is adjusted into predetermined temperature while making
Liquid L is circulated between plunger pump 31 and feed path Fs.That is, can be as needed, make liquid L in feed path Fs → discharge
Mouth 14b → pipe arrangement R3 → liquid circulation portion 32 → pipe arrangement R2 → 31 → pipe arrangement of plunger pump P1 → introducing port 14a → feed path Fs
Circulated in the peripheral passage CR so formed.
In peripheral passage, CR is provided with peripheral passage switch valve V1, V2 of two electromagnetic types, corresponds to each of blow molding
Process, predetermined stream is switched by corresponding peripheral passage switch valve V1, V2.
The connector 14e connected via supply orifice 14d with blow nozzle 13 is provided with Feeding cylinder portion 14.Can will for example
Extract the deaerating mechanism of the air in bottle base PF out before blow molding or instantaneously supply low pressure gas into connector 14e
Body and mechanism etc. of the liquid L remained in connector 14e discharges is connected to connector 14e.
As shown in Fig. 2 for holding member 12, divide formed with outside the mouth of bottle base PF mouth tube portion PFb periphery
Pressurization is installed on metal die 1 with the gas compartment S, the bottle base PF.
On the other hand, it is additional in mouth as shown in figure 1, in order to which counterpart external pressurized is pressurizeed with the gas in gas compartment S
Pressure is with being provided with gas displacement gas cylinder 35 outside mouth between gas compartment S and plunger pump 31.It is the branch of liquid flow path 33 from pipe arrangement P1
There is hydraulic pressure feed path 34, the outer gas displacement gas cylinder 35 of mouth is connected with the hydraulic pressure feed path 34.The outer gas displacement gas cylinder 35 of mouth
It is configured to movably be configured with piston 35b in cylinder 35a inside, the cylinder 35a side marked off by piston 35b
Pipe arrangement P1 is connected to via hydraulic pressure feed path 34, another side is connected to a mouthful external pressurized gas compartment via pressurization stream 36
S.The outer gas displacement gas cylinder 35 of mouth acts according to the liquid L applied from plunger pump 31 via hydraulic pressure feed path 34 pressure,
And the gas pressure by liquid L force-displacement for mouth external pressurized gas compartment S, put on bottle base PF thus, it is possible to improve
The mouth tube portion PFb pressure of gas of periphery be the outer gas pressure of mouth.
In addition, the outer gas displacement gas cylinder 35 of mouth can play function as accumulator, the accumulator as described later will
The liquid L applied from plunger pump 31 via hydraulic pressure feed path 34 pressure is as the outer of the mouth tube portion PFb for putting on bottle base PF
The outer gas pressure of mouth in week and store.
It is that hydraulic pressure feed path 34 is provided with as accumulator switch between gas displacement gas cylinder 35 outside pipe arrangement P1 and mouth
The outer gas displacement gas cylinder switch valve V3 of the mouth of valve.In the illustrated case, the outer gas displacement gas cylinder switch valve V3 of mouth is by normally closed
The magnetic valve (Solenoid valve) of (Normal close) formula is formed, and can be opened according to the presence or absence of energization come control action
Close hydraulic pressure feed path 34.It should illustrate, figure 1 illustrates the state for opening gas displacement gas cylinder switch valve V3 outside mouth.
In addition, pressurization stream 36 is provided with gas pressurized switch valve V4 outside mouth.In the illustrated case, the outer gas of mouth
Pressurization is made up of with switch valve V4 the magnetic valve (Solenoid valve) of normally closed (Normal close) formula, can be according to energization
The presence or absence of carry out control action and switch pressurization stream 36.It should illustrate, figure 1 illustrates open gas pressurized outside mouth to switch
Valve V4 state.
The blow molding apparatus has control device 37, and electro-motor 31c is connected with the control device 37 and by the control
Device 37 carrys out control action.In addition, the control device 37 can be with the seal 15 for controlling the blow molding apparatus, stretching
The control system linkage of bar 17 and switch valve V1~V4 etc. action and be controlled work, or can also be configured to the control
A part for system.
In the blow molding apparatus of the invention of such composition, by acting plunger pump 31, make seal 15 to
Top is mobile and opens supply orifice 14d i.e. blow nozzle 13, so as to will be pressurized liquid L from plunger pump 31 via blowing
Nozzle 13 is supplied (filling) and arrived in bottle base PF, is the shape along the die cavity 2 of metal die 1 by bottle base PF blow moldings.
In addition, in the blow molding apparatus of the present invention, plunger pump can be passed through before liquid L is supplied to bottle base PF
Gas pressure outside mouth is had previously been stored in gas displacement gas cylinder 35 outside mouth by 31 action.That is, blowing is being closed by seal 15
Nozzle 13, peripheral passage switch valve V1, V2 are closed, open the outer gas displacement gas cylinder switch valve V3 of mouth, and closed the outer gas of mouth and add
In the state of pressure uses switch valve V4, act plunger pump 31, and by the action of the plunger pump 31, so that the outer gas displacement of mouth
Cylinder 35 acts and improves the gas pressure of pressurization stream 36, closes the outer gas displacement gas cylinder switch valve V3 of mouth in this case,
The outer gas displacement gas cylinder 35 of mouth is thus enabled that as accumulator and plays function, stores the outer gas pressure of mouth in advance.
Also, act plunger pump 31 and open seal 15 and via blow nozzle 13 to bottle base PF supply it is pressurized
Liquid L so as to carry out blow molding when, the outer gas pressurized switch valve V4 of mouth is opened, thus, it is possible to will be in the stream 36 that pressurizes
The outer gas pressure of pressurized mouth is fed to a mouthful external pressurized gas compartment S, and improves mouth external pressurized gas compartment S gas
Pressure.Thereby, it is possible to when carrying out blow molding to bottle base PF, improve the gas pressure in mouth external pressurized gas compartment S,
Prevent mouth tube portion PFb expanding deformation.
In addition, in the blow molding apparatus of the present invention, the mouth of gas displacement gas cylinder 35 outside mouth will be not only had previously been stored in
Outer gas pressure is used for above-mentioned mouth tube portion PFb expanding deformation, will also have previously been stored in the mouth of gas displacement gas cylinder 35 outside mouth
Outer gas pressure is used for the pressurization of the liquid L for blow molding.That is, plunger pump 31 is acted, and is opening seal 15
Via blow nozzle 13 to bottle base PF supply pressurized liquid L to carry out blow molding when, open the outer gas displacement gas cylinder of mouth
Switch valve V3, thus, gas pressure outside the mouth of gas displacement gas cylinder 35 will be stored in outside mouth it is applied to and be supplied to bottle base PF liquid
Body L.Promptly make the liquid L for being supplied to bottle base PF compared with thereby, it is possible to the situation with only being pressurizeed using plunger pump 31 to liquid L
Boost to defined peak pressure.Now, it is enhanced from the pressure that will open seal 15 to the liquid L for being supplied to bottle base PF
Time between untill before defined peak pressure, the outer gas displacement gas cylinder switch valve V3 of mouth is opened, thus, it is possible to efficient and fast
Liquid L is set to boost to defined peak pressure fastly.
It should illustrate, be connected to pressure sensor 38a, 38b in pipe arrangement P1 and pipe arrangement R3, pass through these pressure sensings
Device 38a, 38b can detect the pressure for the liquid L being fed in bottle base PF.
Fig. 3 is to show that outside mouth gas displacement gas cylinder stores the figure of the state of gas pressure outside mouth, and Fig. 4 is shown in mouth
After outer gas displacement gas cylinder stores the outer gas pressure of mouth, the figure of the state of liquid is supplied to plunger pump, Fig. 5 is shown to bottle base
Supply pressurized liquid and carry out the figure of the state of blow molding.
Next, as one sees fit 3~Fig. 5 of reference picture to the blow molding apparatus as to bottle base PF carry out blow molding and
The processing sequence for forming bottle illustrates.
In the blow molding apparatus of the present invention, as shown in figure 3, first, opening metal die 1, keeping nozzle unit
10 be located at lifting position in the state of, and by seal 15 close blow nozzle 13, close peripheral passage switch valve V1,
V2, the outer gas displacement gas cylinder switch valve V3 of mouth is opened, close the outer gas pressurized of mouth with the state of switch valve V4, make plunger pump 31
Action.Thus, gas displacement gas cylinder 35 outside mouth is acted by the liquid L supplied from plunger pump 31 pressure, improves pressurized stream
Gas pressure in road 36.Also, the gas pressure in pressurization stream 36 closes gas outside mouth in the state of being improved
Cylinder switch valve V3 is replaced, thus makes the outer gas displacement gas cylinder 35 of mouth as accumulator and plays function, and the gas displacement outside mouth
Cylinder 35 stores the outer gas pressure of mouth of predetermined value.
Next, as shown in figure 4, open peripheral passage switch valve V1, make plunger pump 31 along attract direction reversion action, by
New liquid L from liquid circulation portion 32 is supplied to plunger pump 31 by this.Now, seal 15 and the outer gas displacement gas cylinder of mouth
Switch valve V3 remains off constant.
Next, after the bottle base PF part in addition to mouth tube portion PFb is heated into the temperature suitable for blow molding, will
Bottle base PF is so that the state that mouth tube portion PFb is protruded upward is installed on the metal die 1 of blow molding, and closes the metal pattern
Tool 1.Then, decline nozzle unit 10, and so that neck ring PFc is clipped between the upper surface of holding member 12 and metal die 1
Mode bottle base PF is held in metal die 1.
Now, peripheral passage CR peripheral passage switch valve V1, V2 are set on state, liquid circulation portion can be passed through
Liquid L is adjusted to predetermined temperature by 32 one side, while making liquid L be circulated in peripheral passage CR.The state is shown in Fig. 1.
Next, as shown in double dot dash line in Fig. 2, make stretch rod 17 move downwards and by bottle base PF along longitudinal direction (axial direction)
Stretching.
Then, during bottle base PF is stretched along longitudinal direction (axial direction) by stretch rod 17 or after stretching, it is logical to close circulation
Path switch valve V1, V2 stop the liquid L circulation along peripheral passage CR, and make seal 15 and axis body 16 together upward
Mobile, it is blow nozzle 13 to open supply orifice 14d.In addition, seal 15 started to start make when, electricity is made by control device 37
Dynamic motor 31c starts to act and make plunger 31b start to act.Thus, from the force feed of plunger pump 31 come pressurized liquid L via
Supply orifice 14d and blow nozzle 13 are fed to bottle base PF inside, carry out bottle base PF blow molding.The state is shown in Fig. 5.
In addition, when opening seal 15 and carrying out blow molding, from seal 15 will be opened to being supplied to bottle base
PF liquid L pressure be raised to as defined in before peak pressure untill between time, open the outer gas displacement gas cylinder switch of mouth
Valve V3, the outer gas pressure of mouth for being stored in the outer gas displacement gas cylinder 35 of mouth are applied in liquid via hydraulic pressure feed path 34
The liquid L that stream 33 flows is the liquid L for being supplied to bottle base PF.Thus, with only being pressurizeed using plunger pump 31 to liquid L
Situation is compared, and can be corresponded to the amount of the pressure that gas displacement gas cylinder 35 applies outside mouth, be made to be supplied to bottle base PF liquid L rapid
Boost to defined peak pressure.Therefore, it is possible to improve the plastic property of the bottle as obtained from blow molding, and thus after reduction shaping
Bottle shrinkage factor, increase capacity of the bottle etc., it is possible to increase the formability of the bottle obtained by the blow molding apparatus.
In addition, when opening the progress blow molding of seal 15, the outer gas pressurized of mouth is opened with switch valve V4, pressurized stream
A mouthful external pressurized gas compartment is also supplied to by gas pressure outside gas displacement gas cylinder 35 improves outside mouth mouth in road 36
S, this mouthful of external pressurized are enhanced with the gas pressure in gas compartment S.Thereby, it is possible to prevent simultaneously from being added to bottle base PF supplies
Mouth tube portion PFb expanding deformation caused by the liquid L of pressure.
By such blow molding, can by the liquid L supplied from plunger pump 31 pressure by bottle base PF transversely
(radial direction) is stretched as expanding shape, forms the bottle of the shape along the die cavity 2 of metal die 1.
It should illustrate, after blow molding, can enter to exercise the plunger 31b of plunger pump 31 as needed along Return-ing direction
Act and attract liquid L suck-back process from supply orifice 14d, adjustment liquid L loading.
If blow molding is completed, axis body 16 and seal 15 is set together to decline, it is blow nozzle to close supply orifice 14d
13.If blow nozzle 13 is closed by seal 15, as gas pressurized outside mouth switch valve V4 and peripheral passage switch valve
V1, V2 are closed, the state that only the outer gas displacement gas cylinder switch valve V3 of mouth is opened, therefore the liquid to be pressurizeed by plunger pump 31
L is supplied to gas displacement gas cylinder 35 outside mouth via hydraulic pressure feed path 34, is acted by gas displacement gas cylinder 35 outside mouth
To improve the gas pressure in pressurization stream 36.Then, in the state of the gas pressure in pressurization stream 36 is improved
The outer gas displacement gas cylinder switch valve V3 of mouth is closed, thus gas displacement gas cylinder 35 has previously been stored in being blow molded into next time outside mouth
The outer gas pressure of mouth utilized during shape.
Gas pressure outside mouth is being had previously been stored in outside mouth after gas displacement gas cylinder 35, by peripheral passage switch valve V1, V2
It is set on state and liquid L is circulated again along peripheral passage CR.Then, nozzle unit 10 is increased, obtained from blow molding
To the mouth tube portion of bottle pull down blow nozzle 13, metal die 1 is molded, takes out the bottle filled with liquid L, and profit
Its mouth tube portion is sealed with lid etc., thus completes to be contained in bottle (bottle) product using liquid L as content liquid.
Fig. 6 be show by the present application and comparative example be supplied to bottle base liquid reach peak pressure untill time and
The figure for the result that the evaluation of the formability of bottle at that time is compared.
As shown in fig. 6, pass through gas outside mouth of the action of plunger pump 31 by 4.0MPa before liquid L is supplied to bottle base PF
Pressure has previously been stored in the outer gas displacement gas cylinder 35 of mouth, when pressurized liquid L is supplied into bottle base PF, opens the outer gas of mouth
Cylinder switch valve V3 and the outer gas pressurized switch valve V4 of mouth are replaced, gas outside the mouth of gas displacement gas cylinder 35 will be stored in outside mouth
Pressure puts on the liquid L for being supplied to bottle base PF, and in the case, the time untill liquid L boosts to defined peak pressure is
0.19 second, the evaluation of the formability of its bottle was well zero.
On the other hand, as comparative example, the storage of gas pressure outside mouth is not carried out by gas displacement gas cylinder 35 outside mouth, and
Open pressurized liquid L in the state of the outer gas displacement gas cylinder switch valve V3 of the mouth and outer gas pressurized switch valve V4 of mouth
Bottle base PF is supplied to, in the comparative example of this situation, the pressure capacity deficiency of plunger pump 31, liquid L can not be boosted to rule
Fixed peak pressure, the testing result of the time untill boosting to peak pressure is ND (Not Detected：Do not detect), its bottle into
The evaluation of shape it is bad for ×.
On the other hand, gas outside mouth of the action of plunger pump 31 by 4.0MPa is passed through before liquid L is supplied to bottle base PF
Pressure has previously been stored in the outer gas displacement gas cylinder 35 of mouth, but will in the state of gas displacement gas cylinder switch valve V3 outside mouth closing
Pressurized liquid L is supplied to bottle base PF, in the comparative example of this situation, liquid L boost to as defined in untill peak pressure when
Between be 0.23, the formability of its bottle is evaluated as △, can not obtain the effect of the degree of the present application.In addition, not by
The outer gas displacement gas cylinder 35 of mouth carries out the storage of the outer gas pressure of mouth, and is closing gas displacement gas cylinder switch valve V3 outside mouth
Pressurized liquid L is supplied in the bottle base PF comparative example of situation under state, untill liquid L boosts to defined peak pressure
Time also be 0.23 second, the evaluation of the formability of its bottle is also △, and can not also obtain the present application is blow molded into shape dress
The effect for the degree put.So, pressurized liquid L is supplied in the state of gas displacement gas cylinder switch valve V3 closing outside mouth
Should to bottle base PF situation two comparative examples in, to outside mouth in gas displacement gas cylinder 35 store mouth outside gas pressure not to liquid
Time untill body L boosts to peak pressure has an impact.
It can be seen from result above, as the present application, by being configured to lead to before body fluid L is supplied to bottle base PF
Cross the action of plunger pump 31 and gas pressure outside mouth is had previously been stored in into gas displacement gas cylinder 35 outside mouth, and by pressurized liquid
When L is supplied to bottle base PF, the outer gas displacement gas cylinder switch valve V3 of mouth is opened, will be stored in outside mouth outside the mouth of gas displacement gas cylinder 35
Gas pressure puts on the liquid L for being supplied to bottle base PF, so as to shorten liquid L boost to as defined in untill peak pressure when
Between, improve the formability of bottle.
Fig. 7 be show to be supplied to bottle base liquid reach peak pressure untill time and the outer gas pressure of mouth between relation
Figure.It can be seen from Fig. 7, with the mouth of gas displacement gas cylinder 35 outside mouth will be had previously been stored in before liquid L is supplied to bottle base PF
Outer gas pressure rises to 2MPa, 4MPa, 5MPa, 6MPa, make liquid L boost to peak pressure untill needed for time shorten for
0.200 second, 0.192 second, 0.187 second, 0.180 second.So understand, it is advance by being improved before liquid L is supplied to bottle base PF
The outer gas pressure of mouth of the outer gas displacement gas cylinder 35 of mouth is stored in, the time untill liquid L boosts to peak pressure can be shortened.Cause
This, gas pressure setting outside the mouth of gas displacement gas cylinder 35 outside mouth will be had previously been stored in by the pressure capacity according to plunger pump 31
For arbitrary value, it is set as desired value so as to the time untill liquid L is boosted into peak pressure, improves the shaping of bottle
Property.
The invention is not restricted to aforementioned embodiments, it is of course possible to various changes are carried out in the range of its purport is not departed from.
For example, in the foregoing embodiment, blow nozzle 13 is being closed by seal 15, is closing peripheral passage switch valve
V1, V2, the outer gas displacement gas cylinder switch valve V3 of mouth is opened, and close the outer gas pressurized of mouth with the state of switch valve V4, make post
Plug pump 31 is acted, and pressurized liquid L thus is fed into gas displacement gas cylinder 35 outside mouth from the plunger pump 31, so as to outside mouth
Gas displacement cylinder 35 stores the outer gas pressure of mouth in advance, still, however it is not limited to this, it can also be configured to by being provided for driving
Open one's mouth the pressue device of outer gas displacement gas cylinder 35, by gas displacement gas cylinder 35 outside pressue device driving mouth, so as to using with
Supplying the different systems of liquid L from plunger pump 31 acts gas displacement gas cylinder 35 outside mouth, and gas displacement gas cylinder 35 is pre- outside mouth
First store the outer gas pressure of mouth.In the case, as pressue device, as long as the outer gas displacement gas cylinder 35 of mouth can be driven and
The device of the outer gas pressure of mouth is stored, such as electro-motor (servo motor), hydraulic cylinder, pneumatic cylinder etc. can be used to set
It is standby.In addition it is also possible to be configured to by for outside mouth in the cylinder 35a of gas displacement gas cylinder 35 liquid make-up L liquid
Supplement path is arranged to the system different from liquid circulation portion 32, and in the shape for closing gas displacement gas cylinder switch valve V3 outside mouth
The outer gas displacement gas cylinder 35 of mouth is driven under state and gas displacement gas cylinder 35 stores gas pressure outside mouth outside the mouth.
In addition, in the foregoing embodiment, gas displacement gas cylinder 35 outside mouth is used as accumulator, the outer gas of mouth is put
The force-displacement that ventilation cylinder 35 is used for the liquid L that will be pressurizeed by plunger pump 31 is that bottle base PF mouth tube portion PFb periphery is pressurizeed
The outer gas pressure of mouth, still, however it is not limited to this, can also be configured in the hydraulic pressure feed path 34 from the branch of liquid flow path 33
Connection does not have the accumulator of the common composition of the function as the outer gas displacement gas cylinder 35 of mouth.In this case as well, it is possible to
Using for counterpart external pressurized by the use of outside gas compartment S applying mouths outside the mouth of gas pressure gas pressue device as different from accumulator
System be configured.As gas pressue device outside mouth, as long as can counterpart external pressurized carried out with gas compartment S gas
The device of pressurization, for example, can using by electro-motor (servo motor), hydraulic cylinder, pneumatic cylinder etc. come the pressurization that drives
With the device of the various compositions such as air cylinder device.
Further, in the foregoing embodiment, a mouthful outer gas is made before closure metal die 1 declines nozzle unit 10
Body pressure reservoir is in gas displacement gas cylinder 35 outside mouth, but it is also possible to be configured to be provided with bottle base PF metal die in closure
1, and nozzle unit 10 is declined and is assembled in after metal die 1, make the outer gas pressure reservoir of mouth in gas displacement gas outside mouth
Cylinder 35.
Further, in the foregoing embodiment, plunger pump 31 be plunger 31b by electro-motor 31c come the servo that drives
Plunger type, still, however it is not limited to this, for example, can also using by other drive mechanisms such as hydraulic cylinder or pneumatic cylinder come the structure that drives
Into.
Further, in the foregoing embodiment, it is configured to make liquid L circulate in peripheral passage CR, still, however it is not limited to
This, as long as pressurized liquid L can be fed to bottle base from plunger pump 31 via liquid flow path 33 and blow nozzle 13
Composition in PF, it can also be configured to circulate liquid L.
It is further possible to it is configured to, without using stretch rod 17, only utilize the liquid L supplied from plunger pump 31 pressure
To make bottle base PF be stretched as expanding shape so as to form the type along metal die 1 along longitudinal direction (axial direction) and horizontal (radial direction) both direction
The bottle of the shape of chamber 2.
Further, can also be used as bottle base PF has main part PFa and mouth tube portion PFb, but does not possess neck ring PFc
Shape bottle base.In addition, bottle base PF material is not limited to polypropylene, other resin materials can also be used.
Claims (19)
1. a kind of blow molding apparatus is the bottle base supply to the bottomed tube for the metal die for being installed on blow molding through adding
The liquid of pressure and the bottle base is configured to the blow molding apparatus of the shape of the die cavity along the metal die, the blow molding
Device possesses：
Blow nozzle, it is embedded in the mouth tube portion of the bottle base；
Seal, switch the blow nozzle；And
Fluid under pressure supply department, the blow nozzle is connected to via liquid flow path,
Characterized in that, the blow molding apparatus possesses：
Accumulator, branch it is connected to the liquid flow path；And
Accumulator switch valve, it is arranged between the liquid flow path and the accumulator,
Wherein, it is set in advance as pressure having previously been stored in the accumulator, and closes the state of the accumulator switch valve,
Supplied acting the fluid under pressure supply department and opening the seal via the blow nozzle to the bottle base
When answering pressurized liquid, the accumulator switch valve is opened, the pressure for being stored in the accumulator is put on and is supplied to institute
State the liquid of bottle base.
2. blow molding apparatus according to claim 1, it is characterised in that
From will open the seal to be supplied to the bottle base liquid turn into peak pressure before untill time, open institute
State accumulator switch valve.
3. blow molding apparatus according to claim 1 or 2, it is characterised in that
The blow nozzle is being closed by the seal, and in the state of opening the accumulator switch valve, made described
Fluid under pressure supply department acts, and then, by closing the accumulator switch valve, is pressed so as to which pressure is had previously been stored in into the storage
Device.
4. blow molding apparatus according to claim 1 or 2, it is characterised in that possess：Pressue device, drive the storage
Depressor,
The accumulator is driven pressure is stored in the accumulator in advance by using the pressue device.
5. blow molding apparatus according to claim 1 or 2, it is characterised in that possess：The mouth external pressurized gas compartment,
Around the periphery of the mouth tube portion for the bottle base for being installed on the metal die,
The accumulator is made up of gas displacement gas cylinder outside mouth, and one end of the outer gas displacement gas cylinder of the mouth is connected to the liquid
Stream, and the other end is connected to the mouth external pressurized gas compartment via pressurization stream.
6. blow molding apparatus according to claim 3, it is characterised in that possess：The mouth external pressurized gas compartment, is surrounded
The periphery of the mouth tube portion of the bottle base of the metal die is installed on,
The accumulator is made up of gas displacement gas cylinder outside mouth, and one end of the outer gas displacement gas cylinder of the mouth is connected to the liquid
Stream, and the other end is connected to the mouth external pressurized gas compartment via pressurization stream.
7. blow molding apparatus according to claim 4, it is characterised in that possess：The mouth external pressurized gas compartment, is surrounded
The periphery of the mouth tube portion of the bottle base of the metal die is installed on,
The accumulator is made up of gas displacement gas cylinder outside mouth, and one end of the outer gas displacement gas cylinder of the mouth is connected to the liquid
Stream, and the other end is connected to the mouth external pressurized gas compartment via pressurization stream.
8. blow molding apparatus according to claim 5, it is characterised in that the pressurization stream is provided with gas outside mouth
Pressurization switch valve,
The outer gas pressurized of the mouth is closed with switch valve when pressure is had previously been stored in into the accumulator, described close opening
It is opened when sealing body and supplying pressurized liquid to the bottle base.
9. blow molding apparatus according to claim 6, it is characterised in that the pressurization stream is provided with gas outside mouth
Pressurization switch valve,
The outer gas pressurized of the mouth is closed with switch valve when pressure is had previously been stored in into the accumulator, described close opening
It is opened when sealing body and supplying pressurized liquid to the bottle base.
10. blow molding apparatus according to claim 7, it is characterised in that the pressurization stream is provided with a mouthful outer gas
Body pressurization switch valve,
The outer gas pressurized of the mouth is closed with switch valve when pressure is had previously been stored in into the accumulator, described close opening
It is opened when sealing body and supplying pressurized liquid to the bottle base.
11. blow molding apparatus according to claim 1 or 2, it is characterised in that the fluid under pressure supply department is servo
The plunger pump of plunger type.
12. blow molding apparatus according to claim 3, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
13. blow molding apparatus according to claim 4, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
14. blow molding apparatus according to claim 5, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
15. blow molding apparatus according to claim 6, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
16. blow molding apparatus according to claim 7, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
17. blow molding apparatus according to claim 8, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
18. blow molding apparatus according to claim 9, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
19. blow molding apparatus according to claim 10, it is characterised in that the fluid under pressure supply department is servo post
The plunger pump of plug.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-039180 | 2014-02-28 | ||
| JP2014039180A JP6333577B2 (en) | 2014-02-28 | 2014-02-28 | Blow molding equipment |
| PCT/JP2014/006391 WO2015128919A1 (en) | 2014-02-28 | 2014-12-22 | Blow molding apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106061709A CN106061709A (en) | 2016-10-26 |
| CN106061709B true CN106061709B (en) | 2018-02-09 |
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ID=
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1507642B1 (en) * | 2002-05-03 | 2007-06-27 | Nestlé Waters Management & Technology, (Societe anonyme) | Method of producing a polyester resin container and device for performing the same |
| CN103260853A (en) * | 2010-10-18 | 2013-08-21 | 阿美科有限责任公司 | Liquid or hydraulic blow molding |
| EP2810763A1 (en) * | 2012-01-31 | 2014-12-10 | Yoshino Kogyosho Co., Ltd. | Blow molding device |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1507642B1 (en) * | 2002-05-03 | 2007-06-27 | Nestlé Waters Management & Technology, (Societe anonyme) | Method of producing a polyester resin container and device for performing the same |
| CN103260853A (en) * | 2010-10-18 | 2013-08-21 | 阿美科有限责任公司 | Liquid or hydraulic blow molding |
| EP2810763A1 (en) * | 2012-01-31 | 2014-12-10 | Yoshino Kogyosho Co., Ltd. | Blow molding device |
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