CN101588910B

CN101588910B - Aftercooling device and method for aftercooling preforms

Info

Publication number: CN101588910B
Application number: CN200880003040.4A
Authority: CN
Inventors: S·博克
Original assignee: Netstal Maschinen AG
Current assignee: Netstal Maschinen AG
Priority date: 2007-01-25
Filing date: 2008-01-25
Publication date: 2014-07-30
Anticipated expiration: 2028-01-25
Also published as: MX2009006790A; JP2010516507A; CA2676615C; BRPI0807856A2; WO2008090207A1; EP2125327A1; CA2676615A1; CN101588910A

Abstract

The invention relates to a device and a method for finishing and calibrating preforms (10) which are removed from a multiple injection tool in an unstable shape, and proposes an air cooler integrated into the water cooled cooling jackets (21) for the outer side of the open end face of the preform (10). Particularly in the case of special preform varieties, the areas which are unsupported in the cooling jackets (21) can be prestrengthened on the outside, from the beginning of the transfer from the open molds (8, 9) to the removing and/or cooling jackets, by means of a cooling which uses coolingair or deep cooled air. With the novel solution, the highest quality can be assured, in particular with respect to dimensional stability and the absence of pressure points under load, by means of a c alibration in the cooling jackets (32) and the treatment in the area of the aftercooling.

Description

For cooling Aftercooling device and the method again of preform

Technical field

The present invention relates to a kind of Aftercooling device for preform.In addition, the present invention relates to a kind of cooling method again for preform, described preform has threaded portion, blow part and neck ring.

Background technology

In practice, for the manufacture of preform realizes three kinds of recooling systems:

-according to the first scheme, still boiling hot preform is directly handed to the cooling cover of aftercooler.At this, described aftercooler has the cool position of several times with respect to the number of the preform in die casting cycle.

-according to alternative plan, described preform takes out and hands to aftercooler and cooling again by the light base manipulator of getting that there is no cooling effect from unlimited mould.

-according to third party's case of applicant, by manipulator function be divided into have water-cooled get base sleeve get base fixture and extra for preform being handed to the transferring clamp of aftercooler.

According to the latest development, also further shorten die casting machine-cycle time, wherein the preform in soft and shape unsure state is taken out from mould.But less valued problem attracts much attention in the past thus.Because of physical cause, be inhomogeneous at the wall body internal cooling of described preform:

Once-preform is taken out from unlimited mold half, because thermal stress shrinkage stress and occur thus change of shape in other words can appear in the temperature difference of preform inside especially preform wall body inside immediately in preform.

Every kind of mechanism and every kind of operation that-fixture by manipulator shape produces can cause shape to be damaged.

-same situation is horizontal in aftercooler at preform when middle and there will be.

Thus, every kind of effect in cooling again scope becomes extremely thorny work.In the time manufacturing die casting by means of die casting machine, for the time of a complete cycle, be an a crucial factor cool time.First and main cooling power still in die casting, carry out.Two water coolings that die casting halfbody is strengthened in press casting procedure, make the also temperature of the die casting in the mould such as 280 DEG C at least in marginal layer, can be reduced to the scope of about 70 DEG C.In layer outside, soon lower than the glass temperature of so-called about 80 DEG C.Until the real press casting procedure before taking-up die casting almost can be divided half-and-half recently.This is aspect the best quality about preform.Described preform must so strong sclerosis in mold half, makes it can in the situation that not damaging, be got that base servicing unit is clamped and handed to blank taking device.Described blank taking device has the shape matching with die casting external dimensions.The cooling-down effect that the water cooling of the strengthening in die casting halfbody is delayed because of physical cause generation time is until in the nucleus of preform wall body.This means, be not in whole cross section, to reach uniformly so-called about 70 DEG C.Its consequence is, once the water cooling of strengthening is interrupted by described mould, sees so from inner and outwards return to fast heating in material cross-section outside die casting preform more cooling due to two former thereby there is great meaning.In cooling again process, must avoid change of shape, but also must avoid surface damage such as impression etc.In addition, must prevent the crystallization that the cooling procedure in higher temperature range is carried out obtaining too slowly and occurred that by returning to heating part is harmful.Target is in the material of the preform of making, to obtain uniform amorphous state.The residuals temperatures of the preform of making should be so low, thereby in the heavy packages container of die casting with thousands of impourings loosely, on contact point, there will not be any pressure damage and adhere to damage.The die casting of making also must not exceed the surface temperature of 40 DEG C after slight returning heated.After unsettled boiling hot shape preform is taken out from die casting, carry out again cooling extremely important concerning dimensional stability.

Applicant with WO 2004/041510 propose a kind of strengthen cooling stations and a kind of cooling stations again and in strengthening cooling stations, can insert in preform for inner colded cooling pin.The interior shape of cooling cover is coordinated mutually at this and the corresponding interior shape of die casting, and described preform can as far as possible seamlessly be inserted until be resisted against completely in described cooling cover after taking out from die casting.If described preform is in described cooling first stage again in the position in level, they just easily come to sending an invitation card on corresponding coolant jacket barrier part so.By the more deep cooling contact in region below, described preform obtains more violent cooling below, occurs that thus stress and described preform have the tendency of ovalization in described preform.If each preform is easily out of shape shortening the cooling procedure in die casting in described cooling first stage again time, so just again cannot proofread and correct the corresponding change of shape on the preform hardening already.By to suction air be blown into the control targetedly of air, can produce the bulbs of pressure in the inside of preform according to a kind of preferred design of WO 2004/041510, and can make the preform also not hardening be resisted against completely in the whole inner wall surface of cooling cover.After described preform is resisted against in the inner wall surface of described cooling cover fully, in the scope of several seconds kind, keeps Surface Contact and produce sizing effect for each single preform.Described sizing effect is given higher production and quality standard in the time manufacturing preform, and this is impossible in older prior art.In this way, just after taking out, again described preform is put into accurate mould soon from die casting.After the operation of possible change in size in first crucially from die casting to cooling cover, be again eliminated.The sizing of described preform allows it is taken out from mould with still higher temperature and also realize shorter die casting cycle time.

WO 2004/041510 proposes two kinds of solution flexible programs for generation of the bulbs of pressure.According to the first flexible program, on tuyere, arrange sealing ring in other words at cooling pin, sealing circle is resisted against in the intermediate zone of taper in preform inner chamber.According to the second solution flexible program, described tuyere has annular seal, and described seal is for the open edge at preform described in end surface supporting.Here, the bulbs of pressure act on whole preform.The shortcoming of these two kinds of solutions is, the very high accuracy that must move in other words for the guiding of all tuyeres on having such as the multiple die casting of 100 to 200 die sets is in practice prerequisite.

EP 900135 proposes a kind of scheme that is similar to the second solution flexible program noted earlier.The sealing of open edge is with certain pressure and also taking enough shape stabilities of threaded portion as prerequisite.For fear of the change of shape of threaded portion, described preform must be stayed in die casting until higher shape stability always.But the shortening of this and die casting cycle time is runed counter to.

In US2005/0147712, propose a kind of method for preform is processed, preform can be resisted against on the inwall of cooling die by means of low pressure in the method.Cooling die parts are configured to loose structure for this reason, for producing necessary low pressure.Produce the support of low pressure as the outside to from preform, can in the inner chamber of preform, produce overvoltage, and produce overvoltage by means of pin (Pin) or rather, described pin or be configured to equally at least in part loose structure, or have described preform is outwards squeezed in to the diaphragm on the inner side of cooling die.

Have been found that immediately and the unsettled preform of still boiling hot shape to be shaped and to bring very large advantage after being shifted out from unlimited mold half getting base manipulator according to larger test.But, be not all to succeed in all preform types.The fact shows, cannot solve the problem of form accuracy on having with respect to the preform of the unsupported threaded portion of cooling cover.Inventor finds, in the situation that machine cycle time is shorter and shorter, also can be endangered especially whole unlimited distolateral processing in cooling again region.Why can like this, especially from cooling cover, stretch out and cannot obtain cooling by described cooling cover again because of described threaded portion.Whether this does not rely on shapes to preform.

A kind of cooling base sleeve of getting that obtains for preform has been described in US 2005/0194709, and described preform is at least local cooling does not get base sleeve among directly contacting with described obtaining.In order also not carry out coolingly in the region among contact to these, propose at this, load air to these regions cooling, wherein the opening from described cooling cover is carried air stream to described preform.

Summary of the invention

Proposed to develop now the task of a kind of method and a kind of device to the present invention, described method and apparatus ensures parameter and the maximum form accuracy aspect the high quality of preform in the situation that of especially also at least can be short as far as possible in cycle time on popular preform with respect to processing operation in cooling again scope.

Above-mentioned task aspect device by be resolved by the Aftercooling device for preform of the present invention and aspect method by being resolved by the cooling method again for preform of the present invention.At the Aftercooling device for preform, by means of get base fixture by shape also unsettled preform from the unlimited mold half of die casting machine, take out and can carry out again cooling to described preform at least in part in getting base cooling cover water-cooled, wherein, in the distolateral region of opening wide of the outside of described preform for get base cooling cover integrated air device for blowing, can the crust at least unsupported region of described preform be hardened with cooling-air by described air device for blowing, it is characterized in that, described preform can be after getting described in pushing in base cooling cover from the outside in the transitional region between threaded portion and neck ring and/or until to obtain air in the transitional region between neck ring and air blowing part cooling and can be hardened in this process, and enclose sealing ring in other words and shaped within the die casting cycle by means of being arranged on extruding on nipple after being shifted out from described unlimited mold half at the described base cooling cover of getting.For to thering is threaded portion, the preform of part and the neck ring of blowing carries out in cooling method again, described preform in still boiling hot shape unsure state water-cooled obtain at least in part again in getting base cooling cover cooling, wherein, the crust of unsupported distolateral at least a portion of opening wide of the outside of described preform is hardened by being integrated in the air device for blowing cooling-air of getting in base cooling cover, it is characterized in that, described preform can be after getting described in pushing in base cooling cover from the outside in the transitional region between threaded portion and neck ring and/or until to obtain air in the transitional region between neck ring and air blowing part cooling and can be hardened in this process, and enclose sealing ring in other words and shaped within the die casting cycle by means of being arranged on extruding on nipple after being shifted out from described unlimited mold half at the described base cooling cover of getting.

Especially be characterised in that by Aftercooling device of the present invention, in the distolateral region of opening wide of the outside of described preform, be cooling cover integrated air device for blowing, can the crust at least unsupported region of described preform be hardened with cooling-air by described air device for blowing.In addition, described preform can enclose sealing ring (56) in other words and shaped within the die casting cycle by means of being arranged on extruding on nipple (30) after being shifted out from unlimited mold half at described cooling cover.

Be characterised in that by method of the present invention, the crust of unsupported distolateral at least a portion of opening wide of the outside of described preform is come cooling and is hardened in this process by the air device for blowing cooling-air being integrated in cooling cover.In addition, described preform encloses sealing ring in other words and is shaped within the die casting cycle by means of being arranged on extruding on nipple after being shifted out from unlimited mold half at described cooling cover.

Inventor has been found that the manufacture that is fixed to traditional preform after boiling hot preform being inserted in the cooling cover with the columniform air blowing part of slight taper in other words substantially brings huge progress.For carrying out this sizing, must mechanically seal at least described inner chamber of blowing part of preform forcibly.For the compressed-air actuated power of shaping but the sealing force of at least same machinery has been brought new problem, if the region of the unlimited end of preform wall section is not supported by cooling cover inwall.The understanding of no less important is, a denier air is cooling to be integrated in described cooling cover, and and then the lateral surface of the unlimited end of described preform just may harden after unlimited mold half is handed to cooling cover.This means the time of having won such as 1 to 2 second, be placed in for the threaded portion that will complete by extra external refrigeration by means of cooling-air the state that shape is more stable.For air blowing part, the external refrigeration starting immediately accordingly can be brought shortcoming, because described sizing can require larger air pressure thus.In the columniform region of the described part of blowing, the water cooling of cooling cover works immediately by direct wall body contact.Described wall body contact shows huge success from the beginning.The whole region of neck ring should obtain the cooling sclerosis in other words of air from the outside, makes any shape damage because sealing force cannot cause again of mechanical power.Especially preferably in the situation that of sizing, the cooling position of extraneous air is roughly to select with the extruding opposed mode of the sealing force from the inside of sealing ring in other words of enclosing.

Novel cooling solution again for described sizing and/or described processing preferably taking the scheme of thermos cork as starting point.The identical point of two kinds of application is thorny wall body materials.In a kind of situation, be glass, be still to hold yielding plastics in another kind of situation.By solution of the present invention, needn't determine sealing station according to described with high accuracy.The great advantages of novel invention is, can reduce significantly whole cycle time and the corresponding power of die casting machine can be improved to 15% to 20% in the situation that reaching all quality standards completely.The demoulding of described preform can earlier still be carried out in unsure state in the shape of described preform very much.

Have in practice diversified preform, described preform may make the special necessity that is treated as.

-those confirm thorny especially at the columniform preform between part and neck ring with the neck bead that taper attenuates of blowing.

-another kind of thorny preform has those widened sections in corresponding neck.

The invention of described novelty makes this point become possibility, even if namely also can keep form accuracy completely in the time significantly shortening the dry run time.This means, the distolateral special air opening wide by outside is cooling yet exists the storage level for shorter machine cycle time.On-the-spot test shows, machine cycle time can be reduced to 15% and machine cycle time can be reduced to 20% on painted preform on transparent preform.

The invention of described novelty allows to realize a considerable amount of particularly advantageous designs.

Advantageously, can the in the situation that of sizing, start to make the stepless increase of compressed air from sizing.Also can in the time that increasing, the hardenability of described preform reach continuously thus contraction balance.Preferred compressed air supply is guaranteed in the mode that can reproduce by the raising of the sequencing of the control voltage of control valve and the corresponding raising of sizing pressure.

Be particularly preferably described Aftercooling device and distribute freezing unit, for generation of subcooled especially lower than the air of 0 DEG C.In this case described Aftercooling device divides the compressor that is used in cooling-air, utilizes this compressor to produce lower than 2bar preferably lower than the air pressure of 1.2bar for described cooling-air.Advantageously the process of case-hardening is controlled, wherein said Aftercooling device has control system, can activate immediately described air device for blowing moment of cooling cover in other words from getting base sleeve described in preform is handed to by means of this control system.The use of subcooled air brings two huge advantages immediately: can deliver the preform taking out still scalding from die casting after, realize immediately in open region on the one hand the more sclerosis immediately of strengthening of crust.This means, by before processing or shaping and produce the effect of certain machinery, this position of especially being endangered is so violent sclerosis just, thereby no longer occurs ovalization or differential expansion.Subcooled air allows to reduce the amount of cooling-air as additional advantage.Air pressure is such as replacing 4bar to be reduced to only 1bar.Can obtain the effect identical with using surrounding air by much smaller air capacity.Especially described subcooled air can controlled aspect amount and temperature targetedly.

According to the particularly advantageous design of the invention of described novelty, propose at this, described air device for blowing is configured to the distolateral air guide device opening wide of the outside of pointing to described preform.Preferred described Aftercooling device has to be connected and cutting-off controlling system, by means of described connection and cutting-off controlling system from getting base sleeve described in preform is handed in other words moment of cooling cover and can activate described air device for blowing during sizing stage.Can be used in the dangerous all places that exist damage because processing in cooling again scope by solution of the present invention.

A kind of particularly advantageous design has fixture, this fixture has a large amount of nipples, described nipple respectively has an insertion portion inserting in preform, and the insertion portion of described nipple has the extruding that can heave diametrically and encloses sealing ring in other words, described extruding is enclosed sealing ring in other words and can be inserted in described preform.Described extruding circle preferable configuration is the sealing ring that can heave diametrically, can be that the formation of the bulbs of pressure produces sealing force by the direction towards the inwall of described preform in the inner chamber of the air blowing part of described preform of the hole in described nipple by described sealing ring.Especially preferably so control the described bulbs of pressure, thereby can start and this pressure is increased to best pressure with minimum pressure always.

The design of the important design of another one is, described nipple can insert in described preform at the best sealing station that can select in the in check situation in position in the region between threaded portion and air blowing part.Can consider thus the very different shape of the intermediate zone between threaded portion and air blowing part.In the time that starting, each production finds best sealing station.After moving into described nipple, whole preform is blown outer wall partly must be with the described corresponding inwall of getting base sleeve among wall body contacts.Therefore preferred described preform in the time getting base sleeve described in quilt and receive just until completely and fully carry out wall body with the whole bottom that partly comprises sealing of blowing inside and get in base sleeve described in inserting contiguously.Described preform obtains cooling in the duration in multiple die casting cycle in the water-cooled cooling cover of aftercooler again, and wherein said sizing is subject in other words the restriction of the duration in a die casting cycle within the duration in a die casting cycle.Can without any problems described preform be taken out from cooling cover at this.

Aspect device, each nipple has two pipe fittings that can relative to each other move, and on the end of described pipe fitting, installs regularly and keeps convex shoulder respectively.For two kinds of illustrated solution routes above, each nipple has air duct, can in check situation, compressed air be input in the inner chamber of air blowing part of described preform by described air duct.By means of in check regulating part, console panel is moved with respect to platform, enclose sealing ring in other words for activate described extruding simultaneously.Described regulating part has pure support function in type-approval process.Described extruding is enclosed sealing ring in other words and is remained on preform medial surface in the state pressing together.The small power for console panel of described regulating part is just enough concerning good being tightly connected.Advantageously, described nipple is arranged on platform by common console panel, by described platform, described nipple is entered and in preform, leaves in other words preform and make described nipple get base sleeve inner location.For this reason, for described platform has distributed in check actuator, be positioned at best insertion depth or best position for making described extruding enclose sealing ring in other words.

According to preferred the first design, described preform is taken out from get base sleeve and in the time reaching enough shape stability but within the time in a die casting cycle, handed to the cooling cover of aftercooler.After sizing, described extruding is enclosed sealing ring in other words and can be unloaded and can cancel described pressure of blowing in inner chamber partly.By described air duct, can produce low pressure and by means of described nipple, described preform be handed to aftercooler by described nipple.In addition, described nipple does not have refrigerating function.Preferably in short shaping time, not between the inside of described preform and surrounding air, do not carry out air exchange.Described nipple is being equipped air duct, can in preform, produce the low pressure for taking out preform by described air duct.In the inside of described nipple, can be identical air duct for the air duct of compressed air and suction air.Preferred described pipe fitting arranges in the mode in the middle of can moving into each other, and wherein the pipe fitting of the inside has at least one air duct.For the scheme of described the first solution route, described device have can control get base fixture, what this got that base fixture has a some gets base sleeve, this number is at least equivalent to the number of the die casting position of described die casting.Described device is being equipped the compressed air joint that can control and is being produced the bulbs of pressure for preform is shaped for the inside at preform, and described device equipping can control for aspirating the joint of air, wherein be transformed into after low pressure in the replacement bulbs of pressure, can described preform be taken out from get base sleeve by means of described nipple.In this scheme, described device also comprises aftercooler and for not relying on the die casting cycle, preform is delivered and changed in other words the transferring clamp that is inserted into aftercooler from getting base fixture except getting base fixture, finally cooling for preform is carried out.

According to the second favourable design, described device has the aftercooler that is configured to get base manipulator, and described aftercooler has the cool position of number at double with respect to the die casting position of die casting.At this, the preform that needs to be delivered scalding is pushed in corresponding unappropriated cool position, to its shape, strengthen cooling and final cooling after by its discharge.Nipple described here utilizes in check suction air and compressed air can support base sleeve, to discharge and to be handed to conveyer belt from described getting through final cooling preform.According to described the second design, after sizing, also can make described extruding enclose the unloading of sealing ring in other words, cancel pressure in the inner chamber of the described part of blowing, shift out described nipple and hold it in wait position in until be that the new lot of the preform in back to back die casting cycle is reorientated described aftercooler.

For described two kinds of designs, the restriction in die casting cycle is carried out and is subject in the duration in the sizing of preform by compressed air.Still the compression of soft preform and sizing have advantages of huge:

-the first, on base sleeve, ensure maximum heat conduction and maximum cooling effect by water-cooled the getting of use that the crust of described preform is pressed on regularly to the inside.

-the second, accurately again produce the external dimensions of described preform and it is maintained in process of shape sclerosis subsequently with type-approval process.

-tri-, with so-called glass temperature fast by ensureing the mass parameter of physics.

-tetra-, along with being produced as of violent outside material layer cooling and sclerosis is ensuing from getting base sleeve to the operation the cooling cover of aftercooler and be unloaded to subsequently operation on conveyer belt the enough shape stabilities that reach described preform.

According to a kind of other particularly advantageous design method, aspect device, propose, the described water-cooled base sleeve of getting has the vent passages for the corresponding external refrigeration in corresponding preform region in the region between threaded portion and air blowing part, has in addition the pneumatic fitting for described vent passages.Depend on the geometric modeling of described preform, described vent passages be arranged in the transitional region between described threaded portion and neck ring and/or neck ring and air blowing part between transitional region in.Preferably the described water-cooled base sleeve of getting is made up of standardized parts, thereby can for client, the lead ring for vent passages is used for the transitional region between the transitional region between described threaded portion and neck ring and/or described neck ring and air blowing part to carry out cooling by concrete condition.

In addition, aspect method, propose, immediately described preform is handed to get base fixture get base sleeve after until described preform is carried out to external refrigeration by means of air in when end sizing region between threaded portion and air blowing part.Be preferably shape by be arranged on extruding on nipple enclose in other words sealing ring in described preform, insert the transitional region between described threaded portion and neck ring the Position Control in the situation that always in or insert in the transitional region between described neck ring and air blowing part always.In combination, described preform is after pushing in described cooling cover and in type-approval process from the outside in the transitional region between described threaded portion and neck ring and/or until obtain from the outside cooling and sclerosis in the transitional region between described neck ring and air blowing part.A kind of very special advantage is, also before sizing, tighten at the crucial unsupported position of described preform and be connected on the crust of described preform from described unlimited mold half is handed to cooling cover after and obtain immediately hardening more significantly, make mechanical chuck force not on any negative impact of corresponding region generation.In the case of thering is the preform of the neck of widening, from the outside the transitional region between described threaded portion and neck ring is carried out to air cooling.Here push described preform until described neck ring abuts on the end face of described cooling cover always, wherein so construct described cooling cover, thereby in the minimum gap that can eliminate with sizing staying between the bottom of described preform and the corresponding bottom of described cooling cover in the preferred scope in one of percentage millimeter.

Brief description of the drawings

Now by means of several embodiment with further details, the present invention is made an explanation.Wherein:

Fig. 1 is novel the present invention's schematic diagram in ready position before the sizing of preform;

Fig. 2 a inserts nipple in the preform schematic diagram in the distolateral region of opening wide of described preform best;

Fig. 2 b is that the nipple shown in the engineer's scale amplifying encloses sealing ring in other words together with the extruding of arranging of floating;

Fig. 3 a is the schematic diagram of the external refrigeration of the transitional region between the threaded portion of described preform and air blowing part;

Fig. 3 b intercepts part with the part of Fig. 3 a shown in larger engineer's scale;

Fig. 4 a is the intercepting part enlarged drawing of air external refrigeration;

Fig. 4 b is the air external refrigeration in the preform with the neck of widening;

Fig. 5 a, 5b and 5c are the best schematic diagram of simplifying very much of clamp-oning position that sealing ring in other words and external refrigeration are enclosed in described extruding again, wherein in Fig. 5 b and 5c, extraly air external refrigeration are carried out in the thorny region not being supported;

Fig. 6 a constructs the preform of different heavy walls together with the described nipple schematic diagram of the corresponding location of sealing ring in other words;

Fig. 6 b is by the solution of Fig. 6 a, but the bulbs of pressure are cancelled and sealing ring is unloaded;

Fig. 6 c is the schematic diagram that takes out preform by means of the nipple of bearing the function that keeps nipple;

Fig. 7 is the schematic diagram with the embodiment of the first solution route of extra aftercooler;

Fig. 8 is the schematic diagram of the embodiment of the second solution route, gets in this embodiment base manipulator and is configured to aftercooler;

Fig. 9 is that the heat gathering on the preform of making in unshaped situation distributes;

Figure 10 a is the test case with preform sizing;

Figure 10 b is defective preform, and the transitional region not being supported in cooling cover on this preform is not carried out by sclerosis of the present invention.

Detailed description of the invention

Fig. 1 shows and from unlimited mold half 8 and 9, is shifted out situation and type-approval process afterwards at described blank taking device 11 and strengthens cooling beginning situation.At this, the platform 17 with nipple 30 is already in for entering in the ready position of immigration campaign of preform 10 by arrow 31.Described platform 17 is supported on mobile device 32 on Support bracket 36 and linear guides 33 and is parallel to machine axis 37 by linear actuating device 34 by support arm 14 and moves.Described linear actuating device 34 is fixed on the connecting plate of gripper shoe 4 overleaf.Along with the activation of described linear actuating device 34, described nipple 30 moves back and forth (according to arrow 31) with respect to described blank taking device 11.For console panel 16 has distributed regulating part 18, described regulating part 18 makes extruding enclose sealing ring 56 in other words and press together and unload as unique function.

Fig. 1 and 7 has schematically illustrated the die casting machine with following main element for preform: lathe 1, gripper shoe 4 and fixing mould distraction plate 2 and die casting unit 3 at this lathe 1 upper support.Movable mould distraction plate 5 is can axially movable mode being supported on described lathe 1.Two boards 2 and 4 is connected to each other by crossbeam 6, and described crossbeam 6 is through the mould distraction plate 5 of described activity.Between described gripper shoe 4 and the mould distraction plate 5 of activity, be useful on the driver element 7 that produces clossing pressure.Described fixing mould distraction plate 2 and movable mould distraction plate 5 are supporting respectively mold half 8 in other words 9, between described mold half 8 and 9, can form a large amount of holes, for generation of the die casting of the sleeve-shaped of respective number.Described die casting 10 is made in the hole between plug 26 and hole 27.After opening described mold half 8 and 9, the die casting 10 of described sleeve-shaped is attached on described plug 26.Identical die casting 10 in final cooling state illustrates on upper left side in Fig. 7, and described die casting 10 is just dished out from Aftercooling device 19 there.Crossbeam 6 above illustrates with interrupt mode for the purpose of the details between the mold half of opening is shown better.According to the solution of pressing Fig. 1 and 7, after finishing corresponding to the press casting procedure of the first solution route, four method steps for die casting 10 are as follows:

" A " takes out described die casting or preform 10 from two mold halfs.Still received (Fig. 1) and risen to position " B " with this blank taking device 11 by the parts of plasticity are lowered by blank taking device 11 in the space between the described mold half of opening at this.

" B " is sizing and strengthens the cooling stage.

" B "/" C " hands to described preform 10 transferring clamp 12 and described preform 10 handed to Aftercooling device 19 from described transferring clamp 12 from blank taking device 11, corresponding to described the first solution route.

" D " dishes out from described Aftercooling device 19 obtaining preform 10 cooling and that be placed in the state of dimensionally stable.

Fig. 1 and 7 can say so and show for by the instantaneous picture of the key step of the processing procedure of the first solution route.In position " B ", vertically stack up and down the die casting 10 of arranging be transferred fixture 12 in other words 12 ' receive and be placed in along the deflection of the direction of arrow P by described transfer device in the position of setting, according to stage " C ".Described transferring clamp 12 comprises can be round the rotating platform 17 of axis 13, and this platform 17 has console panel 16, and described platform 17 and console panel 16 are arranged in the mode of opening spaced in parallel to each other.Described console panel 16 can be parallel to described platform 17 by regulating part 18 in other words by drive unit and regulate, and is pushed thereby can the die casting of described sleeve-shaped 10 be taken out from described blank taking device 11 in position " B " and be turned back to the Aftercooling device 19 that is arranged in top in the position in described position " C ".Deliver accordingly by the variation of the spacing " S " between described console panel 16 and platform 17 and undertaken.Still boiling hot die casting 10 in described Aftercooling device 19, obtain final cooling and in described Aftercooling device 19 is moved on to position " D " after be discharged from and thrown on conveyer belt 20.Reference numeral 23 represents to have the corresponding intake line water-cooling apparatus of discharge line in other words, and described intake line in other words discharge line represents with arrow for simplicity and is assumed to be disclosed.Reference numeral 24/25 represents air side, and wherein 24 representatives are blown into compressed air supply in other words and 25 and represent vacuum air sucking-off in other words (Fig. 6 a and 6c).

From Fig. 2 a, can find out the direct correlation between the conduct sizing function of nipple and the tapered segment 47 of preform 10 of described nipple 30.The wall body layer that the outside of the corresponding taper of described preform 10 immediately obtains in advance special cooling and unsupported outside after taking out from unlimited mold half 8,9 obtains sclerosis, and (Fig. 3 b) in cooling cover 21 inside.This in the intermediate zone 47 attenuating to the enough shape stabilities of whole preform.Air lead ring 114 outwards remains on the inside of the head 143 of described cooling cover 21.In the time of assembling, described air lead ring 114 is pushed from right to left together with the sleeve 144 of the inside of described cooling cover 21.For cooling-air, arrow 145,145 ' represents.Fig. 2 a in other words 3b illustrates, described extruding enclose in other words sealing ring 56 contact with described preform before cooling-air in action.

Fig. 2 b shows by the insertion portion of the nipple of Fig. 6 a 30 with larger engineer's scale.Feature is very preferably that the floating support of sealing ring 56 is in other words enclosed in described extruding.Described extruding circle 56 by means of loosening support ring 100 remain on two distolateral on.Described two loosening support rings 100 have interior diameter " D ", this interior diameter " D " than the overall diameter of support column 52 " d " large a small gap.Between described support ring 100 and connector 80, also exist along the longitudinal direction gap " Sp ".Thus described extruding enclose sealing ring 56 in other words in inoperative state, obtain slight wave or unsteady meaning on freedom of motion.Automatically enclose in other words and obtain best annular sealing station such as 57,57 ' or 57 on sealing ring 56 in described extruding at this ".

Fig. 3 a and 3b show the external refrigeration of preform 10xx described in the crucial intermediate zone 47 between threaded portion 44 and air blowing part 43.Many preform 10xx have the tapered portion 110 of outside taper in this section.The tapered portion 110 of this taper is disadvantageous, because described tapered portion does not have to support with the opposed region 47 of cooling cover 21.And do not exist and contact between the inwall 111 of described cooling cover.Can be blown into cooling-air and be discharged into again outside by cooling duct 113 by pneumatic fitting 112.This extra cooling great advantages that has, it can and effectively be used from described preform 10 being handed to the first moment of cooling cover 21 extraly in the scope of whole shaping time.With the extra sclerosis of relevant preform lateral surface, prevent from enclosing by described extruding the possible distortion that the thrust of sealing ring 56 causes in other words.And the most significant structural difference between " standard " cooling cover is, in unlimited entrance area (M ü ndungsbereich), has arranged air lead ring 114.On the medial surface of described air lead ring 114, from the position of described pneumatic fitting 112 until arranged annular cooling duct with the drain position 113 ' of surrounding environment adjacency round relevant preform blank.The lateral surface of whole corresponding taper that cooling-air skims over described preform targetedly is thus until the end face of described neck ring 137.

Fig. 4 a and 4b show the neck 136 that preform 10x widens together with taper.In such preform, described in the neck widened belonged to the part and being resisted against on the inwall of described cooling cover 130 of blowing in type-approval process.The external shape that described cooling cover inwall specifies to described preform 10x.The whole air blowing part of described preform 10x abuts to neck ring 137 always.The best sealing station of sealing ring 56 is in other words enclosed in described extruding, and in the region of described neck ring 137, in the region in cylindrical sector, (Fig. 5 b).But, this part is enclosed when sealing ring 56 is heaved in other words and is endangered aspect distortion in described extruding thus, because this part is only partly supported from the outside.Here, extra external refrigeration (KL) has played effect.Along with the air of described threaded portion 44 and neck ring 137 is cooling, the crust of screw thread 44 obtains higher intensity.Whether this does not rely on shapes to described preform.

Fig. 4 b also shows a kind of other interesting design design.Described cooling cover is made up of and comprises the cooling cover 130, cooling cover 131 and top layer sleeve 132 and the head ring 133 of outside of the inside standardized parts, form air duct (gap Sp) with described head ring 133.Design the cooling cover 130 of described the inside and lay corresponding head ring 133 in other words 114 by the profile of described preform 10,10x, 10xx.Represent nethermost threaded line with 138, represent the base of console panel and represent sealing ring with 135 with 134.So design described cooling cover 10x according to Fig. 4 a and 4b, thereby after in preform is pushed to described cooling cover, leave the minimum gap 139 of a few tenths of millimeter in bottom.On the contrary, neck ring 137 described here should lie in completely on the end face of described cooling cover in the time pushing.

The in the situation that of pure columniform air blowing part, can abandon external refrigeration by Fig. 5 a in many cases.But, also will shortening more in the effort of machine cycle time, on the preform with the cylindrical part of blowing, also advantageously, make as early as possible described threaded portion sclerosis, so that every kind of processing again in cooling scope can not cause damaging on screw thread.

Fig. 5 b shows the preform with the diameter expanding in the region of unlimited end.This preform is no longer supported in the region of neck ring 137 and screw thread in described cooling cover.Therefore, very advantageously, handing to the crust sclerosis that makes immediately mentioned region after getting base fixture with cooling-air from die casting here.

Fig. 5 c shows a solution, and this solution can prevent from the tapered portion of the corresponding part of blowing occurring in relevant position that distortion especially heaves that (Figure 10 b).First this use in the time of the extremely short cycle time lower than 10 seconds and thicker preform wall thickness.At the general preform that rises the Pet-bottle of capacity for 1-2, be generally 3 to 5 centimetres with the section of cooling-air processing, wherein screw thread itself is approximately 2 centimetres.

From explanation above, can learn, for preform 10,10x, 10xx, from preform from the moment of taking out unlimited mold half

-whenever all exist best possible cooling situation;

-described preform except of short duration interruption immediately after pushing from unlimited mold half described cooling cover until move into described nipple 30 and be pressed in the sizing stage on the cooling surface of the inside of getting base sleeve 40;

-for described preform 10 absolutely against short interruption be compensated once again by longer sizing of duration;

-after sizing, described preform 10,10x, 10xx are all sidedly in the state in dimensionally stable.Described preform 10,10x, 10xx be maintenance dimensional stability after sizing until aspect the geometry of final cooling state outside it therefore.

Farthest be arranged in water cooling loop

In-die casting,

In the region in-die casting hole and die casting plug in and

-get in base sleeve

Time produce maximum invigoration effect.Not to carry out finally cooling to preform 10,10x, 10xx within the die casting cycle in this target.But be devoted to until the duration is placed in by preform 10,10x, 10xx the ability of toppling over when cooling end the again of long two times to three times, deposits the state of ability and conveying capacity.

Obtain thus huge advantage:

-for shortening terrifically the prerequisite of cycle time,

-further improve thus the productivity ratio of die casting machine,

The maximum dimensional stability of-preform,

-and preform such as also in degree of crystallinity, dimensional stability and without the possible capability and performance of the best aspect damageability.

Fig. 6 a, 6b and 6c show the situation of described preform 10 being shaped and it is taken out from get base sleeve 40 by means of the nipple 30 of bearing the function that keeps nipple.By described nipple 30 by the inner chamber of the part of blowing be placed in low pressure (Fig. 6 a), in other words according to Fig. 6 b described preform 10 is drawn onto on described nipple 30 (number).On support column 52, centering ring 58 has been installed on the end below, this centering ring 58 just matches with the unlimited end of described preform 10, for described preform accurately being remained on to described nipple 30.At the back side of described preform 10, according to Fig. 6 c, compressed air is loaded into the preform end (+number) of sealing.Described preform 10 is encountered backstop 50 towards console panel 16, and completely can be from getting that base sleeve 40 takes out and such as handing to aftercooler or being dished out by being switched to this mode of compressed air according to the second solution route.

Fig. 6 a has schematically illustrated the adjusting that compressed air is supplied with.By the control valve 35,38 of voltage-regulation, regulate the compressed air for shaping to supply with by the voltage with voltmeter by means of control system 39, wherein preferably in the time that starting, described sizing is devoted to increasing continuously of the bulbs of pressure.Can prevent thus the contraction that described preform 10 occurs by the cooling effect of described cooling cover 21 and the quick-hardening that realizes crust.Can in the whole duration of described sizing, described preform 10 be pressed on the inwall of described cooling cover in best mode thus, and can in the region in unsupported region, not occur expanding or damaging because of the processing of preform.

Fig. 7 shows at press casting procedure and finishes and open mold half 8 situation of 9 o'clock in other words.The temperature of described preform 10 reduces with maximum cooling effect in mould.Completely also possibility shape is unstable for described preform 10, thereby it can deform after opening mould in the time dishing out immediately under minimum outside power effect.In the time that press casting procedure finishes, described blank taking device in start position (Fig. 1) and after opening mould not free dropping to tardily between the mold half of opening.In the solution shown in Fig. 7, use independently Aftercooling device 19, in this Aftercooling device 19, still boiling hot preform 10 obtains finally cooling in 3 to 4 die casting cycles.Transferring clamp 12 is handed to Aftercooling device 19 by described preform 10 in the stage of Fig. 7 " B "/" C ".The cooling again of described preform carries out in water-cooled sleeve.

In Fig. 7, horizontal plane represents with EH and vertical plane EV represents.Horizontal plane EH is by two coordinate X and Y determines and vertical plane is determined by coordinate Y and Z.Z-coordinate is vertical, and X-coordinate comes directed transverse to Z-coordinate.Described transferring clamp 12 is implemented yaw motion and the linear movement along X-coordinate.In addition, described transferring clamp 12 can be carried out in check moving along Y-coordinate.Because described transferring clamp 12 is carried out in check moving along X-coordinate, so the preform 10 on the described nipple 30 in transferring clamp 12 is carried out by corresponding in check/modulated moving along the accurate location of X-direction.In this case, for described preform 10 is handed to aftercooler 19, described aftercooler 19 is moved on on a fixed position along directions X, along Y-direction control/regulate described transferring clamp 12 and be placed in corresponding desired position.In described preferred design, can be in order to control/to regulate for the accurate location of delivering of described preform 10 for described two coordinate X and Y for the sports apparatus of aftercooler 19.At this, described transferring clamp 12 is correspondingly placed in to the fixing position of delivering.

About these embodiments aspect full content with reference to WO 2004/041510, in addition with reference to PCT 2007/000319.

In the shown position of Fig. 7 and 8, in the state of described two mold halfs 8 and 9 in opening, thereby described aftercooler 60 can move in the intermediate gaps freely 62 between described mold half.Described aftercooler 60 has three axis of movements altogether, a horizontal movement axis along Y-coordinate, and move both vertically axis and an axes of rotation 63 along Z-coordinate, these axis are coordinated by control system of machine 90.Described rotation 63 is only for throwing conveyer belt 20 by final cooling preform 10.Described rotation 63 is supported with respect to base plate.Vertical drive 65 for the sports apparatus moving both vertically.This vertical drive 65 is arranged on the base plate 66 of horizontal drive apparatus 67 in the mode that can slide.Described horizontal drive apparatus 67 has the AC-servo motor with vertical axis.Described base plate 66 is bearing on two parallel slide rails in the mode that can move back and forth by four slide masses.In described base plate 66 figure side on the right, have the floor piece of pointing to vertically upward, described vertical drive 65 is fixed in this floor piece.Described vertical drive 65 has the AC-servo motor with horizontal axis equally.

There are multiple row that are arranged in parallel by the Aftercooling device of Fig. 8.In shown embodiment, in vertical row, show respectively 12 cooling covers 21.Described cooling cover 21 can be more adjacent with respect to the situation in casting forming part arrange.Therefore not only suggestion is used multiple parallel row but also the offsetting of suggestion row extraly.This means, for the first die casting cycle, 1 represent cooling tube by numeral, for the second die casting cycle, represent cooling tube etc. with digital 2.If fill all row by numeral 3 in the embodiment with four parallel columns, that just equally makes as described to have classifying as of numeral 1 preform is discharged on conveyer belt 20 and is prepared.Remaining processing is carried out in the scope of whole production time by this spirit.In shown embodiment, in the order of magnitude of the whole die casting times of cool time in three-to-four-fold again.Air pressure situation in described Aftercooling device 19 in other words low pressure situation must be controlled by row, to can activate all row 1 in other words 2 etc. in the specific moment simultaneously.Except the precision that the displacement of described aftercooler 19 and platform 17 regulates, importantly, acceleration and deceleration obtain Optimal Control.Carry out in the command device of machine computer 90 in other words visual at control system of machine.Motion process can be optimized aspect each.This starts and stops such as relating to, but considers that speed and displacement especially also relate to acceleration and slow down.

Fig. 9 shows the heat gathering on the preform 10xx making in unshaped situation and distributes.Should be noted that the huge temperature difference from 62.8 DEG C to 45.7 DEG C.This produces the radial temperature difference of 17.1 DEG C on the end of the bar portion of preform.This causes the ovalization of external shape in the first cooling procedure.This less desirable ovalization only can be reduced or be prevented by the longer cool time in shaping dies.In shown embodiment, in the situation that be 13.5 seconds cycle time, measure shown heat and distribute.Ovality is approximately 0.2 millimeter, and this is just also within tolerance limit.

Figure 10 a shows the test case of preform 10xx being shaped with cooling-air.Temperature Distribution in much smaller be only also in the scope of 3.9 DEG C.At this, be reduced to 11.5 second from 13.5 seconds cycle time.Ovality is not 0.2 millimeter and be only 0.05 millimeter.Show thus, manufacture more accurate preform by the present invention can be shorter in cycle time in the situation that.

Figure 10 b shows preform 10xx, does not use described by external refrigeration of the present invention in this preform 10xx.Sizing pressure is too high, thereby this preform is heaved in unsupported conical region.

Claims

1. for the Aftercooling device of preform (10), wherein by means of get base fixture (11) by shape also unsettled preform (10) from the unlimited mold half (8 of die casting machine, 9) in, take out and can carry out again cooling to described preform (10) at least in part in getting base cooling cover (21) water-cooled, wherein, in the distolateral region of opening wide of the outside of described preform (10) for get base cooling cover (21) integrated air device for blowing, can the crust at least unsupported region of described preform (10) be hardened with cooling-air by described air device for blowing,

It is characterized in that,

Described preform (10) can be after getting described in pushing in base cooling cover (21) from the outside in the transitional region between threaded portion (44) and neck ring (137) and/or until neck ring (137) and air blowing partly to obtain air in the transitional region between (43) cooling and can in this process, be hardened, and at the described base cooling cover (21) of getting from described unlimited mold half (8, 9) after being shifted out in, by means of be arranged on extruding on nipple (30) enclose sealing ring (56) in other words insert described preform (10) the Position Control in the situation that in until in the transitional region between threaded portion (44) and neck ring (137) or until in neck ring (137) and the transitional region of blowing between part (43) and shaped within the die casting cycle.

2. press Aftercooling device claimed in claim 1,

It is characterized in that,

Described Aftercooling device has control system, can activate described air device for blowing the moment of getting base cooling cover (21) from preform is handed to by means of this control system.

3. press Aftercooling device claimed in claim 2,

It is characterized in that,

Can control cooling air volume and/or cooling air temperature.

4. press Aftercooling device claimed in claim 1,

It is characterized in that,

The described water-cooled base cooling cover of getting has the cooling duct (113) for the corresponding external refrigeration of described preform (10) in the region between columniform bar portion in other words at threaded portion (44) and the part (43) of blowing, and has in addition the pneumatic fitting (112) for described cooling duct (113).

5. press Aftercooling device claimed in claim 1,

It is characterized in that,

The geometric modeling that depends on described preform (10) vent passages is arranged in the region between threaded portion (44) and neck ring (137) and/or neck ring (137) and cylindrical transitional region of blowing between part (43) in.

6. press Aftercooling device claimed in claim 1,

It is characterized in that,

The described water-cooled base cooling cover of getting is made up of standardized parts, thereby can be by the lead ring for vent passages (114) for the partly transitional region between (43) cooling of the transitional region between threaded portion (44) and neck ring (137) and/or neck ring (137) and air blowing by concrete condition.

7. press Aftercooling device claimed in claim 1,

It is characterized in that,

Described Aftercooling device has to be provided with and a large amount of respectively have with a device for nipple (30) that inserts the insertion portion in preform (10) and the insertion portion of described nipple (30) extruding that can heave diametrically and enclose sealing ring (56) in other words, and described extruding is enclosed sealing ring (56) in other words and can be inserted in described preform (10).

8. press Aftercooling device claimed in claim 7,

It is characterized in that,

Described extruding ring structure is the sealing ring (56) that can heave diametrically, can produce the sealing force that can mechanically produce and regulate towards the direction of the inwall of described preform (10) for form the bulbs of pressure in the inner chamber of the air blowing part (43) of described preform (10) by described sealing ring (56).

9. press Aftercooling device claimed in claim 7,

It is characterized in that,

Described nipple (30) can enclose sealing ring (56) in other words the Position Control in the situation that, in threaded portion (44) and the region between (43) of blowing partly and insert in described preform (10) on the best sealing station that can select with extruding.

10. press Aftercooling device claimed in claim 7,

It is characterized in that,

Described preform (10) can be in still boiling hot shape unsure state be coolingly handed to and is water-cooledly got base cooling cover from die casting for carrying out again, and described preform (10) can be by means of inserting nipple (30) compressed air shaping in described preform (10) to accurate external dimensions.

11. by Aftercooling device claimed in claim 7,

It is characterized in that,

Described nipple (30) is arranged on common console panel (16), for this console panel (16) has distributed in check actuator, in preform (10) is got base cooling cover in other words, insert and be positioned at described extruding is enclosed in the best insertion depth of sealing ring (56) in other words to best in other words position for described extruding being enclosed to sealing ring (56) in other words.

12. by Aftercooling device claimed in claim 1,

It is characterized in that,

Described Aftercooling device have can control get base fixture (11), this gets base fixture (11) and at least has the water-cooled base cooling cover of getting of some, this number is equivalent to the number of the die casting position of die casting, or this number is equivalent to the three-to-four-fold of the number of the die casting position in die casting.

13. by Aftercooling device claimed in claim 1,

It is characterized in that,

Described Aftercooling device have with water-cooled get base cooling cover get base fixture (11), with the transferring clamp (12 of nipple (30), 12, ) and there is the aftercooler (19) of the cool position of the number suitable with the number of the three-to-four-fold of die casting position, the air blowing part (43) of wherein said preform (10) can described shaped in getting base cooling cover and described preform (10) can with accurate shape given in advance within each die casting cycle by means of described transferring clamp (12, 12, ) hand to described aftercooler (19) and transport device (20) final handing to after cooling.

14. by Aftercooling device claimed in claim 3,

It is characterized in that,

Can be immediately regulate maximum after delivering carrying out preform from unlimited mold half (8,9).

15. by Aftercooling device claimed in claim 8,

It is characterized in that,

Described extruding ring structure is the supported sealing ring of floating ground (56).

16. by Aftercooling device claimed in claim 9,

It is characterized in that,

Described extruding encloses that sealing ring (56) floating ground is supported in other words.

17. for to having threaded portion (44), the preform (10) of part (43) and the neck ring (137) of blowing carries out cooling method again, described preform (10) in still boiling hot shape unsure state water-cooled obtain at least in part again in getting base cooling cover (21) cooling, wherein, the crust of unsupported distolateral at least a portion of opening wide of the outside of described preform (10) obtains cooling and is hardened in this process by being integrated in the air device for blowing cooling-air of getting in base cooling cover (21),

It is characterized in that,

18. by the method described in claim 17,

It is characterized in that,

After being shifted out in getting base cooling cover (21) described in described preform (10) is pushed and from unlimited mold half (8,9), the air blowing part (43) of described preform (10) within the duration in die casting cycle on the described inwall of getting base cooling cover (21) compressed air shaping by stepless expansion to accurate external dimensions.

19. by the method described in claim 17,

It is characterized in that,

Start stepless expansion for the compressed air of shaping from sizing, make the crust of described preform (10) further cooling, until reach the maximum bulbs of pressure for shrinking balance, wherein the increase of air pressure reaches by the raising of the control voltage of the control valve in compressed air feedway.

20. by the method described in claim 17,

It is characterized in that,

Described have nipple (30) that extruding encloses sealing ring (56) in other words the in the situation that of Position Control, on the best sealing station that can select and in threaded portion (44) with blow and partly insert in described preform (10) in the region between (43).

21. by the method described in claim 17,

It is characterized in that,

A) enclose sealing ring (56) in other words and in threaded portion (44) and the region of blowing between part (43), insert in each preform (10), wherein the Position Control in the situation that being arranged on extruding on nipple (30)

B) described extruding is enclosed in other words sealing ring (56) and is heaved until touch the inwall of described preform (10) always, and

C) generation of power of the direction by pointing to diametrically described inwall comes outwards the inner chamber of the part (43) of blowing to be sealed.

22. by the method described in claim 17,

It is characterized in that,

Immediately described preform (10) is being handed to the external refrigeration of getting base cooling cover (21) and start by means of air afterwards described preform (10) in threaded portion (44) and the cylindrical region of part between (43) of blowing.

23. by the method described in claim 17,

It is characterized in that,

For preform (10) is controlled the use of cooling-air, thereby after delivering preform, start immediately maximum cooling effect.

24. by the method described in claim 17,

It is characterized in that,

In the case of the preform (10) with the neck of widening from the outside the transitional region between double thread part (44) and neck ring (137) to carry out air cooling.

25. by the method described in claim 17,

It is characterized in that,

Under the preform (10) with the neck attenuating in outside, from the outside air is carried out in this region of described preform (10) cooling.