CN1817606B

CN1817606B - Preform post-mold cooling method and apparatus

Info

Publication number: CN1817606B
Application number: CN2005101136442A
Authority: CN
Inventors: 维托尔德·内特尔; 费萨尔·韦斯拉蒂; 蒂默·布兰德; 戈登·埃利奥特; 理查德·翁特兰德; 格奥尔基·奥拉鲁
Original assignee: Husky Injection Molding Systems Ltd
Current assignee: Husky Injection Molding Systems Ltd
Priority date: 1998-03-31
Filing date: 1998-07-20
Publication date: 2011-02-09
Anticipated expiration: 2018-07-20
Also published as: KR20030031514A; JP2005067206A; AU746598C; RU2189313C2; HK1052156A1; HK1036031A1; CN1294546A; CN1275759C; BR9815798A; IL138727A0; AU8575698A; AU746598B2; CA2326449A1; JP3665568B2; KR20010042339A; JP2002509817A; WO1999050039A1; KR100386415B1; CN1817606A; JP4358715B2

Abstract

The invention relates to an method and apparatus for injection molding and cooling molded articles such as preforms so as to avoid crystallinity. The apparatus and method make use of a take-off plate for removing articles (48) from a mold, which plate may include heat transfer devices for cooling exterior surfaces of the molded articles or preforms (48), and a system for cooling (74) in a controlled manner interior surfaces of the molded articles or preforms (48).

Description

Preform post-mold cooling method and device

The explanation of dividing an application

Present patent application be that July 20, application number in 1998 are 98813946.4 the applying date, denomination of invention divides an application for the Chinese patent application of " preform post-mold cooling method and device ".

Technical field

The present invention relates to a kind of method and apparatus that is used for the molded and shaped of moulded goods and cooling, described moulded goods is such as the prefabricated blank of being made by one or more materials (for example plastic resin).The present invention be more particularly directed to a kind of fast injection method of moulding, wherein before cooling step is finished, mechanograph (such as the PET prefabricated blank) is discharged from model.The present invention has adopted a kind of new molded back cooling means and device that described prefabricated blank is cooled off in inside in the mode of heat convection after described prefabricated blank being taken out and it is positioned over the model outside from model.The invention still further relates to the external refrigeration of carrying out with conduction heat exchange or heat convection mode, described external refrigeration can be carried out with the inside cooling at least in part simultaneously.

Background technology

What mechanograph was carried out suitable cooling representative is a very important aspect of injection molding process, and this is because its can impact the quality of mechanograph and the length of whole injection cycle.This is even more important under situation of using the merocrystalline resin (such as the PET prefabricated blank injection-molded).After injection, described PET resin is retained in the die cavity gap, and cooling is to prevent the formation of crystallization part and described prefabricated blank is solidified before it is discharged in the sufficiently long time.

In order to shorten the cycle time of injection process, if apace a prefabricated blank is discharged, two things can take place usually from a model.First thing is that prefabricated blank is not cooled off equably.Under most situation, crystallization appears in the bottom relative with the model mouth of a river.Accumulating in heat in the wall of prefabricated blank in injection process remains very high being enough to cause molded post crystallization in the prefabricated blank zone, the mouth of a river of prefabricated blank (particularly).Zone, the described mouth of a river is a very important zone, and this is because be that resin inadequate and in described die cavity gap still is in the contacted state of hot stem that waters the formula injection nozzle with heat to the cooling of model in this section.If this zone of a prefabricated blank keeps crystalline state above a specific dimensions and the degree of depth, this will reduce the quality of blowing article so.Second thing is that this prefabricated blank will be too soft, may deform in the transhipment step of back like this.Another important area of a prefabricated blank is neck root portion (neck finish portion), and in many cases, described neck root portion has thicker wall and compares with other parts can the maintenance more heat.Cooling was to prevent its crystallization after this neck root portion needed effective topotype system.In addition, cooling can also make neck fully solidify to bear further operation effectively.

In the past, people have carried out multiple trial for the cooling effect that improves the PET injection-molding-system, but still can not improve the quality of molded prefabricated blank significantly or shorten cycle time.U.S. Pat 4 by the Valyi proposition, 382,905 (here as a reference) have disclosed a kind of injection molding process, wherein molded prefabricated blank is transferred to one first tempering model to carry out first cooling step, then is transferred to one second tempering model to carry out last cooling step.These two tempering models and injection model are similar and have interior arrangement, and described interior arrangement is used for cooling off in cooling procedure and the contacted mould walls of described prefabricated blank.The U.S. Pat 4,382,905 that is proposed by Valyi does not provide cooling device or the additional cooling device that a kind of fluid coolant is circulated in molded prefabricated blank is provided at the device that is used for from molding regions transfer prefabricated blank.

U.S. Pat 4 by the Bellehache proposition, 592,719 have disclosed a kind of injection molding process that is used to make the PET prefabricated blank, wherein utilize one first movable device that molded prefabricated blank is taken out from inject cores, described first movable device comprises the vacuum suction apparatus that is used for fixing described prefabricated blank, and this method comprises that also the outer surface to prefabricated blank carries out absorption of air (convection current) cooling.One second used cooling device combines with one second movable device in the U.S. Pat 4,592,719 that is proposed by Bellehache, also is to utilize absorption of air that the inside of described prefabricated blank is further cooled off.Here see Figure 22.U.S. Pat 4 by the Bellehache proposition, 592,719 do not disclose, cold air is blown into the inside of a prefabricated blank, this type of cooling and suction or the mode that absorbs outside air are compared has better cooling effect, and also discloses and utilize cooling device that the conduction heat exchange mode cools off and that closely contact with the wall of prefabricated blank and towards the air blowing device of the dome portion of described prefabricated blank.This technical scheme that is proposed by Bellehache has many shortcomings, comprises that cooling effectiveness is lower, cooling uniformity is relatively poor, cool time is long, the possibility prefabricated blank distortion is bigger.

U.S. Pat 5,176,871 and US 5,232,715 disclosed a kind of prefabricated blank cooling means and device.Described molded prefabricated blank is injection-molded the core clamping in the molding regions outside.Utilize a kind of cooling agent that does not contact that described core rod is cooled off with described molded prefabricated blank.Cooling tube greater than prefabricated blank be placed on around the prefabricated blank with cold air is blown to prefabricated blank around.The subject matter of the apparatus and method disclosed in these patents is that prefabricated blank is clamped in the core rod and this has increased cycle time widely.In addition, do not utilize cooling agent to reach inner colded purpose with direct contact the between the prefabricated blank.

U.S. Pat 5,114,327, US 5,232,641, US 5,338,172 and US 5,514,309 (here as a reference) proposed a kind of prefabricated blank cooling method for internal, what this method adopted is a kind of liquid coolant.The prefabricated blank of discharging from model is transferred to a prefabricated blank toter, and described prefabricated blank toter has vacuum plant so that with under the situation that the prefabricated blank outer wall contact prefabricated blank is located.But this prefabricated blank toter without any cooling device.The cooling core also is introduced in by the prefabricated blank inside of described toter clamping and a kind of cooling fluid and is blown in the described prefabricated blank inside so that the prefabricated blank cooling.Described cooling agent is also discharged from the chamber around described prefabricated blank by the identical vacuum plant that is used for the described prefabricated blank of clamping.These patents do not disclose, and cold air is blown into a prefabricated blank inside, and described prefabricated blank inner hollow gas freely leaves described prefabricated blank after to the prefabricated blank cooling.These patents do not disclose yet, to internally with the prefabricated blank toter that cools off prefabricated blank simultaneously the outside or one has cooling device.Here see Figure 21.

The open 7-171888 (here as a reference) of Japan Patent has disclosed a kind of prefabricated blank cooling device and method.The automatic toter of molded prefabricated blank is used for described prefabricated blank is transferred to a cooling bench.Described automatics can utilize a kind of cooling water in the mode of conduction heat exchange the prefabricated blank wall to be carried out external refrigeration.Described cooling bench comprises one first movable auto transferring device, the described first movable auto transferring device has a rotary machine hand portion, and described rotary machine hand portion comprises and is used for fixing described prefabricated blank and can conducts heat exchange mode carries out external refrigeration to the prefabricated blank wall vacuum plant.Described molded prefabricated blank is transferred to described manipulator part from described automatic toter.Described manipulator part moves to position B from position A, and here it has turned over an angle of 90 degrees so that described prefabricated blank (only externally cooling off at present) is transferred to a cooling of tool.Described cooling of tool has the device that is used for fixing described prefabricated blank, is used for the device that the inside of described prefabricated blank is cooled off and utilizes blow air or water-cooled is used for device that the outside of this prefabricated blank is cooled off by blow air.Here, the inside cooling of being adopted has been shown among Figure 19 and Figure 20.This patent does not disclose a kind of from prefabricated blank is discharged and put into the method for carrying out inner cooling and external refrigeration in the carrier plate at once from model.Do not disclose when described prefabricated blank yet and simultaneously the inside and outside of prefabricated blank cooled off during by described movable automatic toter clamping.Therefore, this cooling means inadequately fast and can not prevent from crystallization to occur in the model outside.

Figure 19 and Figure 20 show the known method of internally prefabricated blank being cooled off, and one of them cooling device is arranged in the outside of described prefabricated blank and is used for the inside of blow cold air to described prefabricated blank.Because air nozzle is positioned at the outside of prefabricated blank, the cold air stream that therefore enters must influence the warm air of outflow at least in part and mix with it.This will reduce cooling effectiveness widely.If described cooling device is on the axis identical with prefabricated blank, method so shown in Figure 19 is invalid, and this is because do not have air circulation in the prefabricated blank.If described cooling device through laterally moving, can reach the purpose of air circulation so, but this remains invalid as shown in Figure 20, this is because a side of described prefabricated blank is compared with opposite side, its good cooling results and cool off comparatively fast.Described cooling agent has flow and the asymmetrical profile of a kind of accurate diffusion.This profile is very invalid and cooling fluid/gas is converged towards described mouth of a river part or dome portion.

Summary of the invention

A main purpose of the present invention is, a kind of method and apparatus method and apparatus that is used for the production prefabricated blank that can improve cooling effectiveness is provided.

Another object of the present invention is, a kind of method and apparatus that is used for the good prefabricated blank of the quality of production is provided.

Another object of the present invention is, a kind of method and apparatus that can shorten the production prefabricated blank of whole production cycle time is provided.

Above-mentioned purpose is finished by apparatus and method of the present invention.

In one embodiment, this new molded and cooling means involved in the present invention is included in prefabricated blank in the model and prefabricated blank is taken out from model before fully cooling off, and promptly described prefabricated blank keeps making a certain amount of heat of mouth of a river part, neck root portion or whole prefabricated blank crystallization; Described prefabricated blank is fixed on the molding regions outside; And utilize heat convection internally described prefabricated blank to be cooled off so that crystallization in above-mentioned any zone, do not occur.

In another embodiment of the present invention, this new molded and cooling means involved in the present invention is included in prefabricated blank in the model and prefabricated blank is taken out from model before fully cooling off, and promptly described prefabricated blank keeps making a certain amount of heat of mouth of a river part, neck root portion or whole prefabricated blank crystallization; Described prefabricated blank is fixed on the molding regions outside; And utilizing heat convection internally described prefabricated blank to be cooled off so that crystallization in above-mentioned any zone, do not occur, described cooling step comprises with mode that described prefabricated blank directly contacts cooling agent to be set; And utilize heat convection to cool off so that crystallization above-mentioned any zone, do not occur from the outside to described prefabricated blank.Described external refrigeration step can be that carry out simultaneously, that carry out simultaneously to small part or in sequence with respect to described inner cooling step.

In another embodiment of the present invention, this new molded and cooling means involved in the present invention is included in prefabricated blank in the model and prefabricated blank is taken out from model before fully cooling off, and promptly described prefabricated blank keeps making a certain amount of heat of mouth of a river part, neck root portion or whole prefabricated blank crystallization; Described prefabricated blank is fixed on the molding regions outside; And utilizing heat convection internally described prefabricated blank to be cooled off so that crystallization in above-mentioned any zone, do not occur, described cooling step comprises with mode that described prefabricated blank directly contacts cooling agent to be set; And utilize the conduction heat exchange to cool off so that crystallization above-mentioned any zone, do not occur from the outside to described prefabricated blank.Described external refrigeration step can be that carry out simultaneously, that carry out simultaneously to small part or in sequence with respect to described inner cooling step.

In above-mentioned each embodiment, utilizing with respect to described model is that independent device (such as movable and can a remove plate) is discharged described prefabricated blank and made it be fixed on the model outside from model.But one group of described molded prefabricated blank of such independent stationary device clamping or several groups of prefabricated blank of clamping simultaneously.When utilizing described self-contained unit to fix several groups of prefabricated blank, these several groups of prefabricated blank temperature each other is different, and this is because they are to be molded in the different moment.According to the present invention, utilize cooling means involved in the present invention to cool off described molded prefabricated blank with the outside internally according to different orders.In above-mentioned each embodiment, utilization can enter into described prefabricated blank inside at least in part and can make cooling agent carry out the inside cooling at the device (such as cooling pin) of prefabricated blank inner loop.Preferably, utilization can make the accurate symmetrical cooling agent stream that is transported to prefabricated blank inside be drawn towards to need in the described prefabricated blank and more many mode of part (such as mouth of a river part and neck root portion) of cooling than other parts and cool off.In a preferred embodiment of the invention, cooling agent is drawn towards the bottom of described prefabricated blank or dome portion to form a circulation of cooling agent.

In certain embodiments of the present invention, the enough external refrigeration of carrying out in several modes of utilizable energy are replenished and describedly new prefabricated blank is carried out inside cooled off.For example, can (one or more position) carry out external refrigeration on a plate of removing with cooling device, described cooling device can utilize the mode of conduction heat exchange (cooling water) or heat convection (air) to work.Also can (one or more position) carry out external refrigeration on a plate of removing that does not have a cooling device, described like this prefabricated blank only can partly contact with their fixture.Like this, can utilize one independently cooling device carry the cooling air so that the cooling air directly contacts with the outer surface of prefabricated blank.

In another embodiment, described prefabricated blank is fixed on one without any in the plate of removing of cooling device and utilize new cooling pin involved in the present invention only described prefabricated blank to be carried out inside cooling.

New cooling means involved in the present invention can utilize the following step to reach in one embodiment, prefabricated blank or mechanograph are taken out from model, described prefabricated blank or mechanograph are fixed in the plate of removing that can work automatically, described plate has and is used for the system that the outer surface to described prefabricated blank or mechanograph cools off, and then cooling device is bonded on described prefabricated blank or mechanograph inside simultaneously outer surface and inner surface are cooled off.According to the present invention, introduce an additional cooling step, thereby reduce the temperature of prefabricated blank in the mode (for example utilizing a kind of refrigerating gas) of heat convection in the prefabricated blank inner loop.

As mentioned above, method and apparatus involved in the present invention helps preventing crystallization occurring in the most important region (that is, the residing bottom of mouth of a river part or dome portion and neck) in prefabricated blank.In addition, cooling means involved in the present invention and device can be attached in the injection-blow molding equipment, do not have the cooling prefabricated blank of crystallization can carry out temperature adjustment further in described injection-blow molding equipment and be blown to bottle.

According to an aspect of the present invention, a kind of method of utilizing the outer cooling mode of improved model to prevent to occur crystallization in an injection-molded preform comprises a kind of melted material is expelled in the model that is formed by two half modules or template that described two half modules or template are separated to limit a molding regions a model open position; When described melted material is in the die cavity gap that is formed by described half module, make described molten material cools to very near the temperature of the crystallization-glass transition temperature of this melted material so that described mechanograph can mechanically be moved to outside the model under the situation that does not experience geometry deformation; Open described half module so that keep a spacing that is enough to a mechanograph toter can be moved between the described half module between described two half modules; Described mechanograph is discharged from described model and they are transferred to described movable toter; Utilize the conduction heat exchange that described mechanograph is cooled off to reduce crystallization when described mechanograph is in described movable toter, used here cooling agent is a kind of blow air; And utilize heat convection internally to described mechanograph cool off until each mechanograph basically without any crystallization part.Also can utilize a movable toter that this method is replenished with the heat convection device that is used for external refrigeration.

According to an aspect of the present invention, the device that is used to form the injection mould goods of no crystallization comprises, a model with two half modules, and described two half modules can move between a model closed position and a model open position; The device that when described half module is in described model closed position, is used for melted material is expelled to described model; Be used for will be in the described molten material cools in the die cavity gap that forms by described half module very near the device of the temperature of the crystallization-glass transition temperature of this melted material so that described mechanograph can mechanically be moved to outside the model under the situation that does not experience geometry deformation; Be used to open the device of described model so that make and keep a spacing that is enough to a mechanograph toter can be moved between the described half module between described two half modules; Be used for device that described mechanograph is discharged from described model; Be used for described mechanograph is transferred to the device of described movable toter; Described toter has and is used for fixing described mechanograph and utilizes the conduction heat exchange that described mechanograph is cooled off to reduce the device of crystallization; And can also utilize heat convection internally to described mechanograph cool off until each mechanograph (best whole mechanograph) basically without any the device of crystallization part (particularly in the part of the model mouth of a river).Also can utilize a movable toter that this method is replenished with the heat convection device that is used for external refrigeration.

Here used word " plate that can remove ", " removable plate " and " arm ending tool " are interchangeable and represent same structure.

Other details of method and apparatus involved in the present invention and other purpose and the advantage that is had can draw from detailed description with reference to the accompanying drawings, and similar elements is represented with similar Reference numeral in the accompanying drawings.

Description of drawings

What Fig. 1 represented is the variation diagram of the temperature of prefabricated blank in injection process and after injection is finished with respect to the time;

Fig. 2 schematically shows a prefabricated blank in model;

Fig. 3 (a) and Fig. 3 (b) show the thermograde of passing a molded prefabricated blank wall in cooling procedure;

Fig. 3 c shows the Temperature Distribution situation along described prefabricated blank wall;

Fig. 4 is a sectional view representing a kind of injection model related in the prior art;

Fig. 5 is the sectional view of a movable automatics of expression, and described automatics comprises that one " arm ending tool " (EOAT) installs, described " arm ending tool " but (EOAT) device be placed in the molding regions between fixed form and the moving platen;

Fig. 6 (a) and Fig. 6 (b) are the side views of expression one embodiment of the present of invention, this embodiment comprise one automatically and the plate that can remove (or arm ending tool, EOAT) and a framework that is used for fixing cooling pin;

Fig. 6 (c) and Fig. 6 (d) are the front views of embodiment shown in Fig. 6 (a) and Fig. 6 (b);

Fig. 7 (a)-Fig. 7 (d) shows related framework of first embodiment of the invention and cooling pin;

Fig. 8 (a)-Fig. 8 (g) shows the design form of several cooling pins involved in the present invention;

Fig. 9 (a) and Fig. 9 (b) show two cooling pins that embodiment is related of the present invention in more detailed mode;

Figure 10 (a) shows a prefabricated blank that has as the crystal region that is produced in art methods;

Figure 10 (b) shows a prefabricated blank that does not have crystal region of being produced after utilizing the inventive method;

Figure 11 (a)-Figure 11 (1) shows another embodiment of framework involved in the present invention and cooling pin;

Figure 12 is the sectional view of a system, and wherein cooling air channel is bonded in the described half module;

Figure 13 (a) and Figure 13 (b) are the side views of another embodiment of cooling system of the present invention;

Figure 14 is the vertical view of an injection-molding-system with another embodiment of cooling system of the present invention;

Figure 15 is the sectional view of another embodiment of cooling system of the present invention, wherein shows the mechanism that links to each other and be used for the inside of described mechanograph is cooled off with the described plate of removing;

Figure 16 shows one embodiment of the present of invention, has wherein used a plate of removing that does not have cooling device so that described molded prefabricated blank is taken out from molding regions;

Figure 17 shows the another kind of version of cooling pin involved in the present invention;

Figure 18 (a) and Figure 18 (b) show the another kind of version of cooling pin involved in the present invention;

Figure 19 and Figure 20 show the related method that the inside of a prefabricated blank is cooled off of being used in the prior art;

Figure 21 shows another kind related in the prior art and is used for the inside and outside method of cooling off to a prefabricated blank;

Figure 22 shows the system of utilization suction outside air so that a prefabricated blank is cooled off related in the prior art; And

Figure 23 shows a kind of frame structure that has cooling pin on a plurality of surfaces of framework.

The specific embodiment

Now referring to accompanying drawing, what Fig. 1 represented is the variation diagram of the temperature of prefabricated blank in injection process and after injection is finished with respect to the time.Fig. 2 schematically shows a prefabricated blank in model.As can be seen from the figure, in model, cool off normally and to utilize the

cooling tube

12 and 14 that lays respectively in die cavity 16 and the core rod part 18 to finish.Like this, cool off from the both sides of prefabricated blank 11.In addition, as shown in Figure 2, described mold cavity plate 16 has zone, a mouth of a river 20 usually, and zone, the described mouth of a river is formed on the bottom or dome portion 22 places of prefabricated blank 11.Described prefabricated blank has a neck root portion 13, and described sometimes neck root portion has thicker wall, and described thicker wall is difficult to be cooled to prevent the degree of crystallization.

Fig. 3 (a) and Fig. 3 (b) show the thermograde of passing a molded prefabricated blank wall in cooling procedure.Fig. 3 (a) shows model temperature inside gradient, and Fig. 3 (b) shows the thermograde of model outside.Fig. 3 c shows the Temperature Distribution situation along described prefabricated blank wall.What temperature peak was represented is in the dome portion of described prefabricated blank or the temperature in the part of the mouth of a river.

Now referring to Fig. 4; an injection model wherein is provided; described injection model comprises a fixed mold or template 32 and movable half or template 36, and described fixed mold or template 32 have a row die cavity 34, and described movable half or template 36 have a row core rod 38.Described mold cavity plate 32 circulates mutually with a manifold plate (not shown), and described manifold plate can receive melted material from an injecting assembly (not shown) of an injection molding apparatus.Described die cavity 34 receives melted material, for example a kind of valve formula of described hot-runner nozzle mouth of a river nozzle (not shown) by the die cavity mouth of a river 40 from the hot-runner nozzle (not shown).When described

template

32 and 36 was in a model closed position, described die cavity all was used to the cooling device 42 that is cooled off by the melted material in core rod 38 and the die cavity 34 formed die cavity gaps is surrounded.Described cooling device 42 preferably guides a kind of cooling duct of cooling fluid to form by being embedded in being used in the template 32.As mentioned above, core rod 38 and die cavity 34 have formed a plurality of die cavitys gap (not shown) at place, described model closed position, in implementing the injecting step process, by the model mouth of a river 40 melted material are filled in the described die cavity gap.Described core rod 38 also comprises and is used for device 44 that the melted material in the die cavity gap is cooled off.Described cooling device 44 preferably includes a cooling tube in each core rod.Described mold core plates 36 also comprises a discharger plate 46, and described discharger plate 46 is used for molded prefabricated blank 48 is taken out from core rod 38.The operation of described discharger plate 46 is known in the prior art and is not included among the present invention.In fact, described discharger plate 46 can be included in any suitable discharger plate 46 known in this technical field.

According to the present invention, can utilize the molding-system shown in Fig. 4 to be expelled to any molten plastic, metal or ceramic material in the die cavity gap and described material cooled becomes required article.In a preferred embodiment of the invention, described melted material is PET, and mechanograph is a prefabricated blank.But according to the present invention, described mechanograph also one by the prefabricated blank of making more than a kind of material, for example pure PET, reclaim PET and a kind of suitable barrier material (for example EVOH).

Known in the art be, the method of moulding of a prefabricated blank comprises the following steps, close closed model, melted material is expelled in the die cavity gap, begins the die cavity gap is cooled off, make melted material be full of the die cavity gap, melted material is kept under pressure, carry out cooling off in the last model, open model, from core rod, discharge the article solidify or prefabricated blank and described article or prefabricated blank are transferred on the plate that can remove.According to the present invention, in order to shorten cycle time, the residence time of prefabricated blank in model must reach minimum so that make described model closely may produce many group prefabricated blank soon.The problem of the residence time of shortening in model is must shorten cool time, and the state of cure of described mechanograph or prefabricated blank can be enough to bear all back on-carriage steps under the situation that does not have distortion.Shortening cool time is a problematic selection, and this is to make described mechanograph or prefabricated blank effect abundant and that cool off equably because utilize

cooling device

42 and 44 not reach.After process in model was cooled off than the short time and and then opened model when described mechanograph or prefabricated blank, the heat that is kept in described mechanograph or the prefabricated blank was very large and depends on the thickness of described mechanograph or prefabricated blank.Heat may form crystallization part in this in the neck root office of the mouth of a river of described mechanograph or prefabricated blank part or circular top part office, described mechanograph or prefabricated blank or whole prefabricated blank.In order to prevent the crystallization of described mechanograph or prefabricated blank, must adopt a kind of effective cooling means.In cooling procedure, must control the contraction of mechanograph as far as possible, the contraction of mechanograph may cause harmful effect to the last size of mechanograph.

Fig. 5 shows one automatically and an embodiment of the plate 60 that can remove, and described plate can be used in the cooling means of the present invention.The described plate of removing 60 comprises a plurality of hollow fixtures or container 62, and described hollow fixture or container 62 be water cooling tube.Can be used as the plate that the routine of the described plate of removing 60 can remove and be illustrated in the U.S. Pat 5 that proposes by Gessner et al., 447,426 and by Delfer, the U.S. that III proposes is issued patents RE 33 again, in 237, these two pieces of documents here as a reference.In operation, core rod 38 centerings of the opening of a plurality of fixtures 62 and template 36.Utilize the operation of described discharger plate 46 that mechanograph 48 is transferred in the described fixture 62.According to the present invention, the described plate of removing 60 can be provided with a plurality of fixtures 62, and the quantity of fixture 62 can be identical with the quantity of core rod 38 or the multiple of core rod quantity, for example is three times or four times of core rod quantity.Under the situation of quantity more than the quantity of core rod 38 of fixture 62, can make the some of them mechanograph keep a segment length, thereby in the higher mechanograph output of maintenance, can increase cool time in the time in a molded cycle.The inventive method can be implemented under the situation of the mechanograph quantity of not considering to be fixed by described fixture 62.But, in a preferred embodiment of the invention, described automatically and the quantity of the fixture 62 that had of the plate 60 that can remove are three times of core rod 38 quantity.This means, described automatically and the plate 60 that can remove always do not deliver quantity prefabricated blank or the mechanograph identical with fixture 62 quantity.This also means, between one group of prefabricated blank is by the outer wall of the hollow pipe 64 in the described plate of removing and prefabricated blank, closely contact when being cooled, this group prefabricated blank can be got back to the mechanograph that picks up other group in the molding regions between mold core plates and mold cavity plate more than once, described pipe 64 has a kind of cooling liquid (such as water), these contents are in above-mentioned U.S. Pat 5, be illustrated in more detail in 447,426.Heat exchange between the mechanograph of the described pipe 64 and the heat of discharging from model is to utilize the mode of conduction to carry out.Particularly, can use any solid material that to make lubricating and cooling and described solid material is closely contacted so that mechanograph is cooled off with the outer wall of mechanograph.Because one is cooled off described mechanograph or prefabricated blank by making the tight contact between described mechanograph or prefabricated blank and the cooling device with the cooling system of conduction heat exchange mode work, therefore can not produce the shape that keeps described mechanograph or prefabricated blank under distortion or the abrasive situation because of transhipment.

If necessary, the conduction cooling device 64 that is used for the described plate of removing can be substituted by a heat convection device.Can be used in combination with the described plate of removing 60 with the mechanograph that the described plate of removing 60 is delivered or the outer surface of prefabricated blank at any suitable heat convection device known in the art and to cool off.

Now referring to Fig. 6 (a) and Fig. 6 (b), additional cooling device 70 with described automatically and the plate 60 that can remove be used in combination with by utilizing the heat convection mode to make the inner surface of described mechanograph or prefabricated blank and outer surface obtain cooling simultaneously, thereby can improve the effect of molded back cooling, the quality that shortens cycle time and improve prefabricated blank.Described additional cooling device 70 comprises the elongated cooling pin 74 of row, and the effect of described cooling pin 74 is that a kind of cooling fluid is transported to the mechanograph inside of being fixed by the described plate of removing 60.In a preferred embodiment of the invention, described cooling fluid mainly is drawn towards the dome portion (mouth of a river part) 22 of described mechanograph or prefabricated blank and is delivered directly to wherein, makes described dome portion (mouth of a river part) 22 most possibly by crystallization owing to being shortened the cool time in model.Cooling fluid is that the form with a kind of circulation is introduced into.According to the present invention, described cooling fluid is any suitable cooling agent, such as a kind of liquid or gas.In a preferred embodiment of the invention, described cooling fluid is by being positioned at the compressed air that passage 90 is carried of described cooling pin 74.Show this aspect of the present invention in more detailed mode among Fig. 9 (a).

Fig. 9 (a) shows a kind of cooling pin 74 involved in the present invention, and described cooling pin 74 is located in the prefabricated blank or mechanograph 48 of a needs cooling.For cooling agent is flowed in the best way, described cooling pin 74 is incorporated in the described prefabricated blank 48 dearly so that described cooling agent can reach described dome portion or mouth of a river part 22.In addition, described cooling pin 74 also can be used as an additional cooling core.Described cooling pin 74 also helps and forms the circulation that a kind of cooling effect is better than other type of flow.The blowing cold air that utilizes this new cooling pin 74 also can make to enter and the warm air of outflow are separated fully, thereby prevent that their from mixing.

As shown in Fig. 9 (a), cooling pin 74 is positioned at the centre of described prefabricated blank or mechanograph, preferably makes the central axis 220 of cooling pin 74 and central axis 222 centerings of prefabricated blank.As can be seen from the figure, the outer wall 224 of described cooling pin 74 keeps a space D in a upper area UP and between the inwall 226 of prefabricated blank.In addition, keep a spacing d between the inwall 228 of the outlet nozzle 92 of described cooling pin 74 and dome portion 22.In order to form the required circulation form of cooling fluid, preferably the ratio between d and the D is in 1: 1 to 10: 1 scope.Be more preferably, the outlet nozzle 92 of described cooling pin is a kind of divergent nozzle structure.Although it is best using a kind of divergent nozzle for outlet 92, described outlet nozzle 92 also can be a kind of straight wall type nozzle.

Because cooling pin 74 enters dearly in prefabricated blank and as a cooling core, therefore freely flowing out warm air from prefabricated blank also is a kind of circulation form.

Although a kind of preferred structure of described cooling pin has been shown, among Fig. 9 (a) as Fig. 8

(a) to Fig. 8 (g), Figure 17 and shown in Figure 180, cooling pin 74 can have various sizes and shape to reach various cooling effects.For example, as shown in Fig. 8 (a), the bottom LP of cooling pin 74 can have a diameter D with the top UP of described cooling pin ₁Different diameter D ₂As Fig. 8

(a) to shown in Fig. 8 (c), the top UP of described cooling pin can have different shapes.Referring to Fig. 8 (d), cooling pin 74 can have and is used for a kind of cooling fluid is discharged into the horizontal outlet 82 on may the sidewall of crystallization of described mechanograph.As shown in Fig. 8 (e), described cooling pin 74 can have spiral groove 84 to reach specific cooling effect.In Fig. 8 (f) and figure (g) similarly is that cooling pin 74 can have around a plurality of fins 86 of its periphery or a plurality of contact element 88.

Figure 18 a and Figure 18 b show a kind of cooling pin 74, described cooling pin 74 have a plurality of radial conduit 230 with coolant feed in the prefabricated blank on other zone (such as neck root portion or main part) except that dome portion 22.Described radial conduit 230 can be spaced along the length direction of cooling pin cooling agent is guided into the specific region of a prefabricated blank 48.

Cooling pin 74 can be made by any suitable Heat Conduction Material or heat-insulating material.If necessary, as shown in Figure 17, cooling pin 74 can be made with cooling agent that will be additional by a kind of porous material 232 and be diffused in the prefabricated blank on other zone except that described dome portion or mouth of a river part 22 in a kind of mode very uniformly.

In a preferred embodiment of the invention, the design form of cooling pin 74 is to make maximum cooling concentrate on the mouth of a river part or dome portion 22 places of described mechanograph 48, converges effectively so that this zone obtains cooling thereby cooling fluid is reached.Like this, can be formed in and do not have the mechanograph in crystallization zone (such as prefabricated blank) in mouth of a river part or the dome portion 22.

The another kind of pin configuration with a blow cold air system that can be used in apparatus of the present invention has been shown among Figure 19 (b).As shown in this Fig, pin 74 has a blow cold air passage 90, and described blow cold air passage 90 has an outlet 92 that is used for cold air is guided into mechanograph 48 inner surfaces (the preferably dome portion of described mechanograph or mouth of a river part 22).Described passage 90 94 communicates with a cold air source (not shown) by entering the mouth.Described cooling pin 74 also is provided with one will cool off air from mechanograph 48 inner vacuum passages 96 of discharging.Described vacuum passage 86 can link to each other with any required vacuum source (not shown).As can be seen, utilize a sliding mats 100 and a fastener (such as nut 102) cooling pin 74 to be installed on the part of a framework 98 from Figure 19 (b), described sliding mats 100 is used for the automatic adjustment of pin.Described nut 102 can be fixed on element 104 (not shown) with a male thread portion.

Now referring to Fig. 6 and Fig. 7, cooling pin row 74 are installed on the cooling framework 98, and described cooling framework 98 can be made by the lighter material of a kind of weight (such as aluminium).According to the present invention, described cooling framework 98 can be worked in a vertical position or a horizontal level.In both cases, when the described plate of removing 60 mold position reached its rearmost position, described framework 98 was shifted to the described plate of removing 60.Can use any suitable device known in the art to move described framework 98, thereby cooling pin 74 is introduced in the described mechanograph at once so that it advances at utmost speed.In a preferred embodiment of the invention, utilize hydraulic cylinder 110 to move described framework 98.According to the present invention, the quantity of cooling pin 74 can be few with the quantity quantity identical or container 62 of container 62 in the described plate of removing 60.According to the present invention, the described plate of removing 60 is provided with and is used for described mechanograph or prefabricated blank 48 are fixed to device (such as the aspirator) (not shown) of container 62, and also is provided with and is used for device that described prefabricated blank is discharged from the described plate removed.Described fixture and discharger can be in above-mentioned U.S. Pat 5,447, the sort of device disclosed in 426, and the document is here as a reference.As shown in Fig. 6 (c) and Fig. 6 (d), described cooling framework 98 is provided with a plurality of gaps 112.Described gap 112 can make from the described plate of removing 60 discharge the mechanograph that cools off to the end or prefabricated blank are fallen one and are used for conveyer 114 that resulting product is sent from this system.In a preferred embodiment of the invention, laterally move with respect to the container 62 that is used for fixing the prefabricated blank that to discharge from the described plate of removing 60 by making described cooling pin 74, thereby the prefabricated blank 48 of cooling is fully fallen on the described conveyer 114.This is the situation when the cooling framework is in a horizontal level.When described cooling framework was in a vertical position, it can be to the prefabricated blank that falls from the described plate of removing.

Now, wherein show the first row cooling pin 74 referring to Fig. 7 (a) and Fig. 7 (b).As can be seen, each cooling pin 74 all has cooling duct 90 from Fig. 7 (b), and described cooling duct 90 communicates with a cooling air source (not shown) by passage 122.Be provided with a plurality of air valves 124 in the described passage 122, described air valve 124 can be used for regulating the flow of cooling air.Like this, cooling air that can flow is variable supplies to cooling pin 74.

Now, also can directly provide the air that cools off air source (not shown) from for each cooling pin 74 by a simple passage 126 referring to Fig. 7 (c).In addition, as shown in Fig. 7 (d), if necessary, described passage 126 links to each other with fluid conduit systems 120 in each cooling pin by a kind of soft conduit 128.

According to one embodiment of present invention, described cooling pin 74 makes with seldom step and enters into the prefabricated blank of being fixed with the described plate of removing 60, and in each step, described difference constantly molded prefabricated blank have different temperature.In order to make whole cooling step obtain optimization and to avoid the waste of cooling agent, in described first cooling step, described prefabricated blank is very hot, utilizes cooling pin to carry the cooling air of maximum like this.Second and subsequent step in, be less than greatly by the cooling air volume that cooling pin guided that engages with the first molded prefabricated blank and be drawn towards cooling air volume new and hotter molded prefabricated blank.In order further to make cooling procedure reach optimization, temperature that the cooling that can utilize any suitable known temperature sensor (such as a kind of thermocouple) to detect prefabricated blank is preceding and cooled temperature are so that in the adjusting of interrupting can cooling off flow under the molded cycle situation.In a preferred embodiment, the thermocouple (not shown) links to each other with some control device (not shown) that are arranged in the described plate of removing 60 adjacent with each prefabricated blank.Utilize the temperature that detects each prefabricated blank, can carry out some adjustings the cooling air volume that is transported to all cooling pins 74 or some cooling pins 74.This also can compensate the cooling ineffectivity or the heterogeneity of the conduction cooling device that is arranged in the described plate of removing.

Now referring to Figure 10 (a) and Figure 10 (b), Figure 10 (a) with the form of sectional view show one utilize prior art systems molded prefabricated blank 48.As can be seen from the figure, described prefabricated blank 48 may have crystallization part in comprising dome portion 22 and four of neck 13 different zones.On the other hand, Figure 10 (b) with the form of sectional view show one utilize system of the present invention molded prefabricated blank 48.As can be seen from the figure, there is not the crystallization zone in the described prefabricated blank.

Figure 11 (a) has illustrated an alternative embodiment of the invention to Figure 11 (1), the wherein said plate of removing 60 ' remain in the vertical position in the whole molded cycle.This has eliminated the motor of a complexity and has made described plate lighter, shifts out from this die cavity gap thereby can move to the die cavity gap neutralization that is formed between described half module or template 32 and 36 more quickly.An additional function of used described cooling framework 98 in this system ' have and moving of can adding.At first, described cooling pin 74 ' utilize blow air make described mechanograph or prefabricated blank cooling and utilize suction air with described mechanograph and prefabricated blank from the described plate of removing 60 ' discharge.Described prefabricated blank utilize vacuum to be fixed on described cooling pin 74 ' go up and in a return course can from the described plate of removing 60 ' pipe 62 ' discharge.The described plate of removing 60 of described cooling framework 98 ' can move to ' and slave plate 60 ' return, described cooling framework 98 ' also can forward one to from a vertical position and be parallel to a conveyer 114 ' make described prefabricated blank from described cooling pin 74 ' discharge so that utilize to stop to vacuumize.According to the present invention, any suitable device known in the art can be used for making described cooling framework 98 ' and cooling pin 74 ' rotation.According at Figure 11 (a) to a preferred embodiment of the present invention shown in Figure 11 (1), stationary cam 130 translation of framework can be converted to the very simple device of rotation as one in case make the described prefabricated blank of being fixed by described cooling framework can fall a conveyer 114 ' on.As shown in Figure 11 (h), described cooling pin 74 ' can utilize vacuum to engage with described prefabricated blank and with described prefabricated blank from the described plate of removing 60 ' discharge.Then, described prefabricated blank is from described cooling pin 74 ' drop into the conveyer.

Can find out the operation of new cooling device involved in the present invention from Fig. 6 (a) to Fig. 6 (d).Described molded in the cooling after, described molded in cooling procedure shorten to and make described mechanograph or prefabricated blank reach the solid-state moment that can prevent their distortion, open described model and the described plate of removing 60 moved in the molding regions between mold core plates 36 and mold cavity plate 32.Can utilize any suitable device (not shown) that is known in the art to implement quite mobile between described mold core plates and the mold cavity plate in any suitable mode as known in the art.After the described plate of removing reaches described mold position, described cooling pin 74 engage with mechanograph with to described mechanograph the dome portion 22 of each mechanograph or prefabricated blank (particularly) cool off.

Conducting the water cooling plant of cooling although the above-mentioned plate of removing 60 has the prefabricated blank outer surface that is used in described fixture 62, is but not want outer surface is begun to cool down when prefabricated blank is at first put into the described plate of removing under a lot of situations.For this reason, can in the described plate of removing, be provided for controlling the device of cooling so that begin to carry out external refrigeration up to the cooling beginning of the inside of prefabricated blank and/or after finishing.For example, suitable valve (not shown) being set in the described plate of removing moves up to arriving a required moment to prevent chilled fluid flow.Like this, the inside of prefabricated blank cooling and external refrigeration can be carried out simultaneously, carry out simultaneously at least in part or carry out in proper order.

Figure 16 shows the plate that can remove 60 " another embodiment, described plate is not used in the cooling device that molded prefabricated blank is discharged from molding regions.The described plate of removing 60 " can have many prefabricated blank fixtures 62 ", described prefabricated blank fixture 62 " quantity be enough to be fit to one group of prefabricated blank or organize prefabricated blank more.Described prefabricated blank is fixed by the vacuum plant (not shown), and described vacuum plant aspirates on the mouth of a river of prefabricated blank 48 part or dome portion 22 by opening 240.The described prefabricated blank device 62 that also is fixed " fixing, described fixture 62 " can have any desired structure, described fixture 62 " can utilize a kind of cooling other/air directly cools off prefabricated blank." preferably being enough to fixing described prefabricated blank and having the hole or other opening 242 and 244 of rigidity, described fixture can not directly contact with prefabricated blank in these holes or other opening 242 and 244 described fixture 62.Utilization has these fixtures that only partly covers the outer surface of prefabricated blank, and described prefabricated blank can be cooled on their outer surface, utilizes cooling pin 74 also they to be carried out the inside cooling simultaneously.In this case, cooling step comprises transfers to the described plate of removing 60 with prefabricated blank from model ", the described plate of removing 60 " moves and moves to the cooled region adjacent with described molding regions outside molding regions.At described cooled region place, 74 pairs of described prefabricated blank 48 of cooling pin of utilizing framework 98 and entering into prefabricated blank inside are at least in part carried out the inside cooling.Simultaneously, " fixing prefabricated blank 48 has the outer surface that is cooled off in the mode of convection current by additional cooling bench 250, and described cooling bench 250 blows to described prefabricated blank fixture with a kind of coolant fluid by the described plate of removing 60.As shown in Figure 16, shown in additional cooling bench 250 have a plurality of nozzles 252,254 and 256 cooling agent is blowed to the outer surface of prefabricated blank, described nozzle 252,254 and 256 is blown into the described plate of removing 60 by window 258 with cooling fluid " and to be blown to cooling fluid on the outer surface of prefabricated blank by window in the prefabricated blank fixture or opening 242 and 244.Described nozzle 252,254 and 256 is blown into described prefabricated blank fixture 62 by opening 242 and 244 with cooling fluid " in and on the outer surface of prefabricated blank.Although having, above-mentioned additional cooling bench 250 is used for nozzle that two prefabricated blank are cooled off, but it should be understood that described cooling bench 250 can have many nozzles if necessary and cool off with the outer surface to the prefabricated blank of any requirement in implementation process.

Described additional cooling bench 250 can utilize that " independently cooling device cools off with the outside internally to prefabricated blank 48 simultaneously with the described plate of removing 60.This scheme makes the plate 60 that can remove " very light, safeguard with being easy to very fast.If necessary, described prefabricated blank fixture 62 " can only tighten described prefabricated blank at described neck, reserve the door and window that more is used to blow cooling fluid like this and cooled off with the outside to prefabricated blank.

According to another embodiment of the invention, the described plate of removing can comprise the external refrigeration device that utilizes blow air or can not comprise cooling device.In both cases, utilize new cooling means involved in the present invention and device to carry out the inside cooling.

New cooling means involved in the present invention and device are very beneficial for cooling molded prefabricated blank in the high pitched tune model.As everyone knows, the temperature that flows through the molten resin of a model can change a lot owing to multiple reason, and these reasons comprise: (a) the inhomogeneous heating of hot runner manifold; (b) in the melt channel of manifold, form limiting bed; (c) inhomogeneous die cavity cooling; (d) cooling of mouth of a river part place is invalid when model.One of variations in temperature who passes model must regulate at the local height place as a result so that made the hottest prefabricated blank cooling crystallization occurs in last prefabricated blank before cool time.In order to prevent the formation in crystallization zone, cooling system involved in the present invention can provide a kind of different type of cooling, and the type of cooling can change according to the temperature profile of each model.Can sensor be set in the described plate of removing 60 to regulate the amount of cooling water of each cooling pin 74.Another result that uneven temperature distributes in model is that the mouth of a river that in most of the cases is arranged on the dome portion 22 of described prefabricated blank is the hottest part of molded prefabricated blank.Because described mouth of a river part is cooled off ground in the model closed position slower, if in the model cool time oversize or do not provide additional cooling in the model outside, this part will be probably by crystallization so.According to the present invention, utilize cooling pin 74 to be blown into cold air in the prefabricated blank and be a kind of new operation that prevents from prefabricated blank to form the crystallization zone very effectively near zone, the mouth of a river.

Cooling means that the present invention innovated and device are also beneficial to the cooling inefficiency of compensation removable panel.Because not exclusively contact may may be changed by plate by the mechanograph temperature that removable panel kept between hot iron mold ware and the cooling tube.According to the present invention, the temperature sensor that is positioned at removable panel and cooling framework can be used for providing information to the cooling control module, and described cooling control module changes the cooling flow of supplying with each prefabrication.

Up to now, the cooling means of above-mentioned adaptation also is useful, because consider, the model temperature of molded prefabrication can change within one day, utilize the function of special resin, the function of plant equipment, or because by inappropriate valve rod action or because the localized variation of the caused prefabrication thickness of core bar in the model cavity in the hot nozzle.These situations promptly can not be predicted and can not determine easily; Yet the invention provides a kind of mechanism to adjust cooling step behind each die cavity molding according to each mechanograph or prefabrication temperature.

Significantly reduce for the cycle period that increases molding profit cool time, can be by design and removable panel and moving of framework of cooling reach simply.This considers that also very strict assembling, maintenance and operation retrain the rigidity between the cooling pin and mechanograph and prefabricated blank, mobile accuracy, location etc. on removable panel and the shake table.Position with cooling framework of alignment pin depends on that also a kind of like this mode reduces " footprint " of entire machine.

Also be illustrated in this with reference to Figure 13 (a) and Figure 13 (b), Figure 13 (a) and Figure 13 (b) expression an alternative embodiment of the invention, here during additional air cooling step, removable panel 60 remains on a upright position, just is parallel to template 32,36.Cooling framework 98 is transferred to removable panel 60, and cooling pin 74 enters mechanograph or prefabricated blank 48.After all prefabricated blank coolings, 98 withdrawals of cooling framework, removable panel 60 turns over 90 ° and is parallel to conveyer 114, removes on Leng Que the prefabricated blank slave plate 60 then.The method has been simplified the design of cooling framework, and the cooling framework does not need tumbler and avoids cooling off the device that framework and the prefabricated blank of slave plate discharge are disturbed mutually.

Also with reference to Figure 14 of expression another embodiment of the present invention, wherein said automatically and the plate 60 that can remove comprise that additional translating device 150 is move prefabricated blank along an axis that is parallel to the prefabricated blank axis of rotation.The additional mobile cooling framework 98 that in cooling procedure, is maintained fixed of having simplified of this prefabricated blank.As shown in Figure 14, the described plate of removing 60 or other device that is used for fixing described prefabricated blank is moved toward fixing cooling framework 98 along axis X.Behind cooling step, the described plate of removing 60 turn over an angle of 90 degrees so that its towards described conveyer 114, thereby discharge the prefabricated blank be cooled.

Now referring to the Figure 15 that shows the new air-cooling apparatus that links to each other with the described plate of removing 60.This scheme shown in the figure need not a split-frame that is used for fixing cooling pin, thereby has reduced the size of described cooling system and injection molding apparatus.This new cooling pin 174 is for the U font and can move all prefabricated blank that is parallel to each other simultaneously so that they can be introduced in the described prefabricated blank and can utilize by piston BB or a strip that other any known devices drove they are shifted out from prefabricated blank.Described pin 174 also can rotate so that they can be brought into the axis of prefabricated blank centering or from this axis shifts out around an axis " A " that is parallel to described prefabricated blank.This rotation simultaneously of all pins 174 can utilize any suitable device as known in the art to finish.According to the present invention, described U font cooling pin 174 has one can enter the arm " A " of described prefabricated blank, an arm " C " parallel with arm " A " to be used for moving described arm " A " and an arm " B " that is used to connect described arm " A " and " C ".The axis A around arm " C " of described pin rotates and can carry out in a different manner.As shown in Figure 15, this can utilize an elongated tooth bar 178 by piston AA operation to finish described piston AA and piston 180 centerings that are connected to the arm " C " of described each cooling pin.Can utilize rubbing device to finish above-mentioned same rotation, a translation, and another rotation.The process of the cooling tube 62 that prefabricated blank 48 is moved to the described plate of removing 60 from core rod 38, described U-shaped cooling pin 174 can " stop " in adjacent with each cooling tube 62 specific location so that they can not impact the prefabricated blank that moves and need less space open described model.After being fixed on described prefabricated blank 98 in the described plate of removing 60, utilize piston BB at once and the cooling pin 174 that links to each other with plate 60 is advanced and when they reach a height that makes on the top of arm " A " in prefabricated blank, make them to rotate with the mode of prefabricated blank centering and to utilize returning of piston BB that they are introduced in the prefabricated blank at last with 176.Described with 176 and each arm " C " between fixedly contact can finish by disc spring 182 or other an any suitable device that is pressed against on the shoulder 181.Utilize a flexible pipe 184 blow air to be provided to each cooling pin by arm " C ".The cooling pin that this and described plate of removing links to each other has following advantage: the size of simplifying and reduce cooling system, improve cooling effectiveness, this is because carry out the inside cooling at once after prefabricated blank is in the described plate of removing, and can carry out inner cooling and can utilize to long-time continuous the described plate of removing that prefabricated blank is cooled off especially in the moving process of the described plate of removing.In discharging the process of chilled prefabricated blank, described cooling pin must turn to once more they initial position so that they no longer with prefabricated blank centering.

Now referring to Figure 12, wherein show the air-cooling apparatus 210 that comprises cooling duct 210, described cooling duct 210 so that opening and make after model is opened in model process neutralization before the described plate of removing enters molding regions, makes by the fixing prefabricated blank of core rod and obtains cooling in described half module 32,36.Cooling step that should be additional will further make prefabricated blank solidify before will and being transferred to the described plate of removing before the described plate of removing is brought in the molding regions.

According to another embodiment of the invention, can from other accompanying drawing this is used, understand easily, described automatically and the plate that can remove only keep one group of prefabricated blank.After injecting step, it is outer and will cool off air or cold air is blown into each prefabricated blank from described cooling pin that the described plate of removing rests on molding regions.The prefabricated blank of the described cooling of discharging from the plate that can remove will be brought back to the molding regions that does not have prefabricated blank.

Figure 23 shows the another kind of structure of the framework 98 that is used for fixing cooling pin 74.As shown in this Fig, this framework 98 can have cooling pin 74 on two apparent surfaces.In addition, described framework can be around first axle 300 and second axis 302 rotations vertical with described first axle 300.Can be used for making framework 98 to rotate at any suitable device (not shown) known in the art around described axis 300 and 302.

Utilize this structure, first group of cooling pin 74 engaged with prefabricated blank 48 in the plate that can remove 60 and begin prefabricated blank is carried out the inside cooling.Then the fixture 62 of prefabricated blank 48 from the plate 60 that can remove can be moved on on the cooling pin 74.One or more rotations that space 98 is centered in the axis 300 and 302 utilize cooling pin 74 to carry out the inside cooling of prefabricated blank 48 simultaneously.When first group of prefabricated blank reached position, left-hand side shown in Figure 23, second group of cooling pin 74 can engage with second group of prefabricated blank 48 in being fixed on the plate 60 that can remove.If necessary, the prefabricated blank 48 of left-hand side can be carried out external refrigeration in the mode of conduction by a cooling bench 304, and described cooling bench 304 has a plurality of nozzle (not shown) so that cold air is blown on the outer surface.If necessary, described framework 98 can have a coupled prefabricated blank grip block 308.

Claims

1. the method for cooling frame goods (48), this mechanograph comprise and are in the higher relatively first area of heat (22) and are in the relatively low adjacent area of heat that described method comprises:

Mechanograph (48) is taken out from the mould that comprises half module (16,18,32,36), described mechanograph (48) is moved in the fixture (62) of arm ending tool (60), and described mechanograph keeps certain heat, described arm ending tool is operated between the primary importance and the second place, described primary importance be fixture (62) be used to receive mechanograph (48) half module (16,18,32,36) between the position, the described second place is in half module (16,18,32,36) outside;

The arm ending tool is got back to the second place between half module (16,18,32,36);

With the time of arm ending tool (60) after get back to the second place between the half module (16,18,32,36), cooling pin (74,174) is inserted into mechanograph (48), mechanograph is fixed in the described fixture simultaneously;

Described method is characterised in that also and comprises the steps:

Formation is with respect to the open system of cooling pin and mechanograph, this open system has passage, this passage allow with the gaseous state cooling fluid from the inner ventilation of mechanograph (48) to surrounding environment, this open system forms like this: cooling pin is located to limit a space between the outer surface region of the cooling pin openend adjacent with described outer surface region with described mechanograph (48) with respect to the openend of described mechanograph (48), wherein, described space boundary described passage; And

Force the gaseous state cooling fluid to flow along the inner passage (90) of cooling pin, this inner passage (90) ends at tip (92), this tip (92) when being inserted into mechanograph (48) and described first area (22) separate, the gaseous state cooling fluid mainly ejects to begin strengthening cooling first area (22) at least along the direction of first area from most advanced and sophisticated (92), thereby allow of the internal flow of this gaseous state cooling fluid from mechanograph, and the process passage is discharged in the surrounding environment, and, when being positioned at mechanograph, inner passage and tip make cooling fluid concentrate on the first area together

Along with the gaseous state cooling fluid is discharged from the tip of cooling pin, in the inner passage of cooling pin, form vacuum, so that this mechanograph is fixed on the cooling pin, take out from described fixture to allow this mechanograph.

2. the method for cooling frame goods as claimed in claim 1 (48), wherein, described gaseous state cooling fluid is the cooled compressed air of (90) air-supply along the inner passage.

3. the method for cooling frame goods as claimed in claim 1 or 2 (48), also comprising when mechanograph is fixed in the fixture applies cooling for the exterior section of mechanograph (48), wherein, described exterior section to mechanograph (48) applies cooling and flows along the inner passage while or simultaneously incomplete with forcing cooling fluid, or one after the other takes place.

4. the method for cooling frame goods as claimed in claim 1 or 2 (48) also comprises the amount that changes in time by the cooling fluid of cooling pin transmission.

5. the method for cooling frame goods as claimed in claim 1 or 2 (48), wherein, the tip is used for producing the diffusion chilled fluid flow from it.

6. the method for cooling frame goods as claimed in claim 1 or 2 (48) wherein, is incorporated into the mechanograph certain depth to allow cooling agent and reach and the inner dome part of cooling frame goods with the tip of cooling pin.

7. the method for cooling frame goods as claimed in claim 1 or 2 (48) also comprises:

Most advanced and sophisticated (92) are separated first distance (d) from the first area of mechanograph (48); With

The sidewall (224) of described cooling pin (74,174) is separated second distance (D) from the madial wall (228) of mechanograph (48);

Wherein, first distance and the ratio of second distance (d: D) at about 1: 1 in about 10: 1 scope.

8. device that is used for cooling frame goods (48), this mechanograph (48) is made in the injection molding that is formed by half module (16,18,32,36), mechanograph has and is in the higher relatively first area of heat (22) and is in the relatively low adjacent area of heat, and described device comprises:

Arm ending tool (60) with at least one fixture (62), in use, arm ending tool (60) is operated between the primary importance and the second place, described primary importance is that mechanograph (48) is received into position between the half module (16,18,32,36) of corresponding that in described at least one fixture (62), and the described second place is in half module (16,18,32,36) outside; In use, when mechanograph keeps a certain amount of heat, mechanograph (48) inserted corresponding that in described at least one fixture (62);

Adjacent to the cooling pin (74,174) on the framework (98) of the second place, this cooling pin has tip (92), and framework (98) in use is used for moving so that cooling pin (74,174) inserted mode system product (48) after arm ending tool (60) arrives the second place with respect to arm ending tool (60); It is characterized in that:

Cooling pin (74,174) has the inner passage (90) that ends at tip (92), most advanced and sophisticated (92) are positioned at mechanograph but separate with first area (22) when being inserted into mechanograph (48) by framework (98) with relatively moving of arm ending tool (60), wherein, cooling pin (74,174) in use can be connected to the cooling fluid transmission system, and this system is used to force the gaseous state cooling fluid to flow from most advanced and sophisticated (92) the gaseous state cooling fluid is mainly discharged to strengthen the cooling in the first area at least along the direction of first area along inner passage (90);

During discharging the gaseous state cooling fluid from most advanced and sophisticated (92), with framework (98) with respect to arm ending tool location in use limiting channelled open system, this passage allow with the gaseous state cooling fluid from the inner ventilation of mechanograph (48) to surrounding environment;

During discharging the gaseous state cooling fluid from most advanced and sophisticated (92), described device operationally separates framework from arm ending tool (60), the passage of described open system produces by form a space between the openend of zone of the outer surface of cooling pin (74,174) and mechanograph, and mechanograph in use is positioned at the fixture of its correspondence; And

Vacuum plant joins the inner passage of cooling pin to so that the source of a vacuum to be provided, and make that discharging the described mechanograph in back at the gaseous state cooling fluid is fixed on the cooling pin, thereby described mechanograph takes out from described fixture.

9. device as claimed in claim 8, wherein, described device is made as introduces the mechanograph certain depth to allow the inner dome part of cooling agent arrival and cooling frame goods with the tip of cooling pin.

10. device as claimed in claim 8 or 9, wherein, described framework cooling pin is positioned in the mechanograph (48) so that:

Most advanced and sophisticated (92) separate first distance (d) from the first area of mechanograph (48);

The sidewall (224) of described cooling pin (74,174) is apart from madial wall (228) second distance (D) of mechanograph (48);

And first distance and the ratio of second distance (d: D) at about 1: 1 in about 10: 1 scope.

11. install as claimed in claim 8 or 9, wherein, the gaseous state cooling fluid is the cooled compressed air of (90) air-supply along the inner passage.

12. device also comprises the valve that is used for quantitative gaseous state cooling fluid is supplied to cooling pin (74,174) as claimed in claim 8 or 9.

13. install as claimed in claim 8 or 9, wherein, the tip has in divergent nozzle structure and the straight wall nozzle structure, when being positioned at mechanograph, inner passage and tip make the gaseous state cooling fluid concentrate the zone that centers on first area (22) to main.

14. device as claimed in claim 8 or 9, wherein, it is one of following that cooling pin has:

The diameter that varies along its length;

In lateral fluid outlet (82) or the radial conduit (320) of cooling pin sidepiece, lateral fluid outlet (82) or radial conduit (320) join inner passage (90) to and are used for cooling fluid is directed to the neck (13) of mechanograph and at least one of main part;

Groove along the outer surface of cooling pin (74,174);

Around the fin of the peripheral intervals of cooling pin (74,174), described fin separates to the size of the inwall of mechanograph (226,228) with the outer surface that in use reduces cooling pin in the length of each fin from cooling pin is outstanding; With

A plurality of contact elements (88) along the outer surface of cooling pin (74,174).

15. install as claimed in claim 8 or 9, wherein:

The a plurality of fixtures of end portion supports of arm ending tool (60); With

Framework comprises the cooling pin (74,174) that is less than the fixture on the arm ending tool (60);

Thereby in use, those only selected in the mechanograph in each fixture tip each selected mechanographs of alignment insertion by cooling pin are cooled.

16. injector; comprise the device that is used for cooling frame goods (48); described mechanograph (48) is made in the injection molding that is formed by half module (16,18,32,36); described mechanograph has and is in the higher relatively first area of heat (22) and is in the relatively low adjacent area of heat, and described device comprises:

Arm ending tool (60) with at least one fixture (62), in use, described arm ending tool (60) is operated between the primary importance and the second place, described primary importance is that mechanograph (48) is received into position between the half module (16,18,32,36) of corresponding that in described at least one fixture (62), the described second place is in half module (16,18,32,36) outside, in use, when mechanograph keeps certain heat, described mechanograph (48) inserted corresponding that in described at least one fixture (62);

Adjacent to the cooling pin (74,174) on the framework (98) of the second place, this cooling pin has tip (92), and framework (98) in use is used for moving so that cooling pin (74,174) inserted mode system product (48) after arm ending tool (60) arrives the second place with respect to arm ending tool (60);

It is characterized in that:

During discharging the gaseous state cooling fluid from most advanced and sophisticated (92), with framework (98) with respect to arm ending tool location in use limiting channelled open system, this passage allow with the gaseous state cooling fluid from the inner ventilation of mechanograph (48) to surrounding environment; And wherein

Vacuum plant joins the inner passage of cooling pin to so that the source of a vacuum to be provided, and make that described mechanograph is fixed on the cooling pin after the gaseous state cooling fluid is discharged, thereby described mechanograph takes out from described fixture.

17. injector as claimed in claim 16, wherein, described device is made as introduces the mechanograph certain depth to allow the inner dome part of cooling agent arrival and cooling frame goods with the tip of cooling pin.

18. as claim 16 or 17 described injectors, wherein, described framework cooling pin is positioned in the mechanograph (48) so that:

19. as claim 16 or 17 described injectors, wherein, the gaseous state cooling fluid is the cooled compressed air of (90) air-supply along the inner passage.

20., also comprise the valve that is used for quantitative gaseous state cooling fluid is supplied to cooling pin (74,174) as claim 16 or 17 described injectors.

21. as claim 16 or 17 described injectors; wherein; the tip has in divergent nozzle structure and the straight wall nozzle structure, and when being positioned at mechanograph, inner passage and tip are concentrated to main zone around first area (22) the gaseous state cooling fluid.

22. as claim 16 or 17 described injectors, wherein, it is one of following that cooling pin has:

The diameter that varies along its length;

Groove along the outer surface of cooling pin (74,174);

23. as claim 16 or 17 described injectors, wherein: