• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    DEVICE FOR THE CONTINUOUS PRODUCTION OF A COMPOUND TUBE WITH UNION SLEEVE A device for the continuous production of a composite tube features halves of molds (12, 12a) added in pairs to a mold and an injection head (8), which features a external nozzle (22) for the extrusion of an external pipe (35) and an internal nozzle (21) for the extrusion of an internal pipe (37). Between the external nozzle (22) and the internal nozzle (21), an annular and concentric cylindrical air channel (24) opens and concentric to the medium length shaft (18) of the injection head (8).
    公开号:BR102012028016B1
    申请号:R102012028016-7
    申请日:2012-10-31
    公开日:2021-01-05
    发明作者:Dr-Ing Ralph Peter Hegler
    申请人:Dr-Ing. Ralph Peter Hegler；
    IPC主号:
    专利说明:

    [001] Such a device is known from EP 2,103,412 A1 (according to US 2009/0236032 A1). Here, in the space between the external nozzle and the internal nozzle, a channel for the support air supply opens, and the support air is connectable and disconnectable. From the region between the external nozzle and the internal nozzle again opens a special ventilation channel, which is constantly open to the atmosphere.
    [002] From EP 0.563.575 B1 (according to US 5.320.797) a device of similar type is known, in which ventilation is carried out in each case by opening a magnetic valve arranged in the channel for supplying the support air, where the support air supply is interrupted.
    [003] It is known from the document in EP 0 995 579 A2 a device of the generic type, in which, between the internal nozzle and the external nozzle, a gas channel flows out of the spray head, which can be connected , on the one hand, to a source of compressed gas, by means of a valve, to blow the so-called carrier gas and, on the other hand, to the atmosphere. In this case, corresponding to the generic type established above, there is no constant ventilation of the intermediate space between the inner and outer tubes.
    [004] From the document in EP 1 612 030 A1, a device similar to the device according to the document in EP 0 995 579 A2 is known.
    [005] From the document in WO 2005/009 720 A1 a device for the manufacture of a double-walled thermoplastic tube with a coupling sleeve is known, in which, between the internal nozzle and the external nozzle, an air channel support stream flows out of the spray head, through which support air is blown continuously, that is, without any interruption, with a pressure above the pressure of the atmosphere. As a result, there is no ventilation.
    [006] The design with a constant compound for the atmosphere proved to be fundamentally advantageous for the production of large composite tubes of polyolefins, therefore, polyethylene and / or polypropylene. Large compound tubes here mean tubes with nominal diameters> DIN 250, where compound tubes comprise single compound tubes and compound tubes with a double joint sleeve.
    [007] But it was verified, that this system still needs improvement.
    [008] Therefore, the objective of the invention is based on perfecting a device of the type initially planned in such a way that the control of air pressure in the space between the outer tube and the inner tube is possible with very simple means.
    [009] This objective is solved according to the invention in a device, by means of the characteristics in its identification part. Through the large or scalable support and ventilation air channel, it is possible to simply compensate for a need for air volume between the tubes that changes along the mold segment. This manifests itself especially in the case of large tubes, since the formation of wave crests requires greater volumes of support air, while in the formation of wave hollows, where the inner tube is welded with the outer tube, little or no even no support air. The support air cannot only be fed, but also removed.
    [0010] The design according to the invention is particularly advantageous when it is envisaged to also produce double joining gloves on the device. Here, through the large or scalable support and ventilation air channel according to the invention, it is possible, on the one hand, to obtain rapid ventilation to the atmosphere, but on the other hand, also a rapid supply of atmospheric air with a pulsating widening of the inner tube for the coupling sleeve. This is accomplished by the fact that in addition to the support air, as needed, more or less ambient air can enter from outside. This is an important effect on slightly fluctuating values of partial vacuum in the halves of the shell. This is valid for the production of double joining gloves and, in fact, especially with regard to the requirements for the ventilation procedure when passing the glove formation back to the production of the double compound tube of normal waviness. The system is very stable. Particular sealing measures in the starting area of the support and ventilation air channel are not necessary, since the entire system does not have to be pressure-proof and, consequently, neither is it. The support air is measured here in such a way that it supports the forming in some areas through the vacuum process, however, it does not exert any dominating influence on the forming, especially during the formation of the double joint sleeve.
    [0011] Subclaims represent advantageous developments.
    [0012] Other particularities, advantages and characteristics result from the following description of examples of execution based on the drawing. Show:
    [0013] figure 1 an installation essentially consisting of two extruders, a molding machine and a subsequent cooling device for the production of composite tubes with union sleeves in top view in schematic presentation,
    [0014] figure 2 an injection head and the inlet end of the molding machine in the horizontal cut,
    [0015] figure 3 shows a partial section of figure 2 in an enlarged scale in relation to figure 2,
    [0016] figure 4 a cross section through figure 2 corresponding to the intersection IV-IV in figure 2,
    [0017] figure 5 a modified cross-sectional representation in relation to figure 4,
    [0018] figure 6 a cross section through figure III, corresponding to the intersection VI-VI in figure 3,
    [0019] figure 7 a representation corresponding to figure 2 of an injection head and
    [0020] figure 8 an enlarged partial representation of figure 7.
    [0021] The installation shown in figure 1 for the production of composite tubes has two extruders 1, 2. These are each driven by a traction motor 3 or 3a with an adjustable number of revolutions, which - in relation to a transport direction 4 of the entire installation - it is planned upstream before the hoppers 5 of the extruders 1, 2.
    [0022] In relation to the transport direction 4 downstream of the extruders 1, 2, there is a molding machine 6, a so-called corrugator, to which, again, a posterior cooling device 7 is subsequently disposed. In an extruder 1 disposed in alignment with the molding machine 6 and the subsequent cooling device 7, a transversal injection head 8 is mounted, therefore an extrusion tool, which protrudes into the molding machine 6. The other extruder 2, arranged laterally in this extruder 1, it is connected with the injection head 8 through an injection channel 9 which flows laterally into the transversal injection head 8. As schematically outlined in figure 1, a composite tube 10 is modeled on the molding machine 6, which leaves the molding machine 6 in the direction of transport 4 and is cooled in the after-cooling device 7. Behind that after-cooling device 7, it can then be cut, into pieces of appropriate length.
    [0023] The molding machine 6 is known in its structure and usual in practice. It is described, for example, in EP 0.563.575 B1 (according to US patent 5,320,797), to which express reference is made. It essentially has a machine table 11, on which are arranged in the halves of the cups 12, 12a. The halves of the cups 12, 12a are joined together on the machine table 11 in the transport direction 4 to form a pair of cups 13 and guided from - in relation to the transport direction 4 - upstream inlet end 14 to the outflow end downstream 15, and again in the direction of transport 4, the successive pairs of molds 13 are compacted. The driving of the halves of the molds 12, 12a gathered in a molding line 16 each in pairs of molds 13, is carried out by means of a traction motor 17. The transport of the molding parts 12, 12a and the molding pairs 13 to the machine table 11 is shown in detail and described in EP 0.764.516 B1 (corresponding to US 5,693,347), to which reference can be made.
    [0024] The cross injection head 8 has two fusion channels arranged concentrically to a common medium length shaft 18, therefore, an internal fusion channel 19 and an external fusion channel 20, which - in relation to the transport direction 4 - terminate downstream at an internal nozzle 21 or an external nozzle 22. The internal fusion channel 19 is connected to an injection channel 23 of the extruder 1 arranged in alignment with the molding machine 6, while the fusion channel outer 20 is connected to the injection channel 9 of the other extruder 2. Between the internal nozzle 21 and the external nozzle 22, a support and ventilation air channel 24 cylindrical and concentric to the shaft 18 flows out of the injection head 8. At the end from the injection head 8 downstream - in relation to the transport direction 4 - a calibration pin is mounted, which also runs concentrically to the axis 18.
    [0025] The injection head 8, that is, the extrusion tool, is formed of several parts. The internal fusion channel 19 is limited by an internal calibration pin 26 and an inner nozzle liner 27. The external fusion channel 20 is limited by an external nozzle pin 28 and an outer nozzle liner 29, with the descriptive report - in relation to axis 18 - is carried out from the inside out. Between the inner nozzle liner 27 and the outer nozzle pin 28, the support air and ventilation channel 24 is formed and, in fact, as a cylindrical channel 24, concentric to the axis 18.
    [0026] In the injection head 8, therefore, in its coating of the external nozzle 28, it is provided - in relation to the direction of transport 4 - upstream of the external nozzle 22, an external cylindrical area, formed of half halves 30, installed so that it can be exchanged, between which and the halves of the cups 12, 12a an annular sealing gap is formed. This design is shown and described in EP 11 184 779.4, to which reference is made.
    [0027] The cup halves 12, 12a have annular mold cavities 33, which are successively spaced at regular distances and are each connected to partial vacuum channels 34. At the inlets of the cup halves 12, 12a on the molding line 16 , the partial vacuum channels 34 arrive at the partial vacuum supply sources not shown, shown and described in EP 11 184 779.4, so that the mold cavities 33 are ordered with partial vacuum.
    [0028] The melting mass of plastic material from the extruder 2 fed through the injection channel 9 to the injection head 8, flows through the external melting channel 20 to the external nozzle 22 and there it is extruded by forming a tube external 35. Due to the partial vacuum and due to the support air fed by the support and ventilation air channel 24, this external tube 35 is installed in the mold cavities 33 under the molding of a tube formed with annular wave crests 36. extruder 1 the melting mass of plastic material, through the injection channel 23, is added to the transverse injection head 8 and flows through the internal fusion channel 19 to the internal nozzle 21 and from there it comes out as an internal tube 37, which it reaches the calibration pin 25. It easily extends out of the inner nozzle 21 in the direction of transport 4, until the inner tube 37 goes against the wave hollows 38 of the outer tube 35 and is welded here with it. The inner tube 37 and the outer tube 35 form, after cooling under solidification, the connecting tube 10.
    [0029] As can be seen especially in figures 2 and 3, the halves of the molds 12, 12a are formed in such a way that in each of the intervals given within the joint tube 10 produced continuously, union gloves 39 are formed. For this purpose, a pair of gland halves 12, 12a forms a glove cavity 40, which therefore has an essentially smooth cylindrical wall 41. Between the wall 41 of the glove cavity 40 and the mold cavity 33 which precipitates in the transport direction 4, a passage surface 42 is formed. At the rear end - in relation to the transport direction 4 - of the cavity wall 41 of sleeve 40, circumferential grooves 43 are connected to reinforce the joining sleeve 39 and a molded segment 44, which is shaped into a feed end 45 that extends out of the sleeve 39. In this, a surface of passage 46, which leads to the next mold cavity 33 - signposted in the direction of transport 4
    [0030] The support and ventilation air channel 24 extends - as shown in figure 2, an essential part of the extension of the injection head 8 in the direction of axis 18. Within the scope of - in relation to the direction of transport 4 - upstream end of the injection head 8, a support air supply tube 47 - as can be seen especially in figures 2 and 4 - flows into the support and ventilation air channel 24. This is connected to a power source compressed air 49 through a support air tubing 48. In the support air tubing 48 there are arranged - in that order from the compressed air source 49 - a manually adjustable pressure regulator 50, an actionable magnetic valve 51 and an pressure measurement 52. From the support and ventilation air channel 24 a ventilation duct 53 constantly opens towards the atmosphere.
    [0031] Figure 5 shows a variant in relation to the design according to figure 4. In this case, an air distribution housing 54 is supported by means of a support plate 55 on the injection head 8. The support air 48 flows into the center of the air distribution housing 54. Several pipes, in this case, four support and ventilation air pipes 56 lead to the support and ventilation air channel 24. From the air distribution housing flows, in addition, a ventilation pipe 53 constantly open to the atmosphere.
    [0032] As can be seen in figure 6, in the support and ventilation air channel 24 directly before its outlet space 57, between the external nozzle 22 and the internal nozzle 21, several are provided in the present example around of 120 centering pieces 58 displaced against each other, to support and center the pin of the external nozzle 28 with the parts radially external in relation to the coating of the internal nozzle 27 and the parts located within it. These centering pieces 58 are dimensioned in such a way that a sufficiently large free cross section remains in the support and ventilation air lime 24, 24 '.
    [0033] In figures 7 and 8 is shown a modified 8 'cross injection head, that is, a modified extrusion tool, in which it is called a star distributor. This design is used especially in the production of tubes with a very large diameter, since in the conventionally described design of the injection heads their weight is very large. Such a cross injection head 8 ', as shown in figures 7 and 8, is shown in detail and described in EP 2.116.352 B1, to which reference can be made. In addition, with the parts of the current specification, the same parts are assigned the same reference numbers. Same, but constructively different, functional parts are designated with the same reference numbers with a raised line, so that a detailed description is not necessary.
    [0034] The internal nozzle pin 26 ', the internal nozzle liner 27', the external nozzle pin 28 'and the external nozzle liner 29' are each composed of several parts. In the region before the outlet space 57 ', the support and ventilation air channel 24' is formed and is arranged cyclically concentric to the axis 18.
    [0035] At least one support air supply tube 47 'runs parallel to the axis through a part of the cross injection head 8' and, in fact, between the internal fusion channel 19 'and the external fusion channel 20 '. At least one vent pipe 53 'is arranged accordingly. The support air supply tube 47 'and the ventilation tubing 53' end inside the cross injection head 8 'in an annular disk-shaped distribution channel 59, from which the support and ventilation air channel 24 flows. '.
    [0036] The minimum slot width a of the support and ventilation air channel 24 or 24 'is large enough to be measured. Valley:> 2.0 mm.
    [0037] During the production of the composite tube 10 the partial vacuum is applied in the partial vacuum channels 34, therefore, both in the mold cavities 33, as well as in the cavity of the sleeve 40. During the production of the normal composite tube 10 with crests of waves 36, the magnetic valve 51 is opened, so that from the compressed air source 49 the compressed air with a pressure set in the pressure regulator 50 is introduced through the support and ventilation air channel 24 or 24 'in the space 57 between the internal piping 37 and the external piping 35. Since channel 24 or 24 'is constantly open to the atmosphere, a support air pressure that can be determined in practice is adjusted, which is markedly lower than the previous pressure in the pipeline support air 48. Due to the partial vacuum in the mold cavities 33 and the light support through the support air, the outer tubing 35 is placed against the wall of the mold cavity 33 and, in this way, the outer tubing is molded. The air volumes of the oscillating support air in each case when molding a wave crest 36 or wave concavity 38 in the external pipe 35, are compensated or buffered through the support and ventilation air channel 24 or 24 '. Therefore, no pressure control installations are required for the supporting air. The support air supply continues until the passage surface 42 of the glove cavity 40 reaches the internal nozzle 21, as shown in figures 2 and 3 or 7 and 8. Until that time, the external pipe 35 supported by the partial vacuum by means of a slight overpressure of the support air is placed against the wall 41 of the cavity of the sleeve 40. This is true, in this way, for the formation of the external pipe 35 for the composite pipe 10 and at least also, in part, for the formation of the external pipe 35 for the union sleeve 39. In the mentioned time shown in figures 2 and 3 or 7 and 8, the magnetic valve 51 is closed, so that the space 57 or 57 'is ventilated through the support air and ventilation 24 or 24 '. At the same time, through the additional gas channel 60, disposed adjacent to the internal nozzle 21, an internal pressure is applied on the internal pipe 37, so that the internal pipe 37 is placed against the external pipe 35 already adjacent, at least partially, to the wall 41 of the glove cavity 40. Since space 57 or 57 'is continuously connected to the atmosphere and no supporting air is yet fed, atmospheric pressure dominates in space 57 or 57'. The air present in the space, with the widening of the internal pipe 37 until installation in the external pipe 35, is expelled from the space 57 through the support and ventilation air channel 24 or 24 ', therefore, it is distributed in the atmosphere.
    [0038] The pressure drop, therefore, the pressure balance, from the slight overpressure to atmospheric pressure at the closing of the magnetic valve 51, is carried out in the short term, that is, almost abruptly approximated, the ventilation of the space 57 extends for all the time from the widening of the internal pipe 37 to the union sleeve 39.
    权利要求:
    Claims (9)
    [0001]
    1. DEVICE FOR THE CONTINUOUS PRODUCTION OF A DOUBLE WALL TUBE (10) consisting of a transport direction (4), a smooth inner tube and an outer tube welded to it and provided with corrugations (36) and a longitudinal axis center (18), - in which halves of molds (12, 12a) provided with annular mold cavities (33), each complement each other in pairs in each case in the molding section (16) to form a mold with a central longitudinal axis (18) and are arranged on the circumference and guided in a transport direction (4), - in which the mold cavities (33) are connected to partial vacuum channels (34) formed in the shell halves (12 , 12a), - where an injection head (8, 8 ') of at least one extruder (1, 2) is arranged on the molding line (16), - where the injection head (8, 8a') it is provided with an external nozzle (22) for the extrusion of an external pipe (35) and, upstream in the transport direction (4), with an internal nozzle (21) for the extrusion of an internal pipe (37) and, at its end downstream in the direction of transport (4), with a calibration pin (25), - in which at least one support air channel (24, 24 ') opens the head injection (8) between the external nozzle (22) and the internal nozzle (21) characterized by the support air channel being configured as a support and ventilation air channel (24, 24 ') that is constantly open to the atmosphere , it is cylindrical annular at least adjacent to the region between the internal nozzle (21) and the external nozzle (22) and is concentric in relation to the central longitudinal axis (18).
    [0002]
    2. DEVICE, according to claim 1, characterized by: at least one additional gas channel (60) opening the injection head (8) between the internal nozzle (21) and the calibration pin (25), in which at least one pair of the shell halves (12, 12a) is provided with a glove cavity (40), and in which the glove cavity (40) is limited by a passage surface (42) which is upstream in the direction transport (4).
    [0003]
    DEVICE according to either of claims 1 or 2, characterized in that the support and ventilation air channel (24) extends over a substantial part of the length of the injection head (8).
    [0004]
    DEVICE, according to any one of claims 1 to 3, characterized in that the support and ventilation air channel (24, 24 ') has a slit width a, for which it is valid: a> 2.0 mm.
    [0005]
    DEVICE according to any one of claims 1 to 4, characterized in that the support and ventilation air channel (24, 24 ') is connected to at least one support air supply tube (47, 47').
    [0006]
    6. DEVICE according to any one of claims 1 to 5, characterized in that the support and ventilation air channel (24, 24 ') is connected to at least one support air pipe (48), which is connected to a compressed air source (49).
    [0007]
    7. DEVICE according to any one of claims 1 to 6, characterized in that a pressure regulator (50), a solenoid valve (51) and a pressure measuring device (52) are arranged upstream of the air channel. support and ventilation (24, 24 ').
    [0008]
    DEVICE, according to any one of claims 1 to 7, characterized by a ventilation pipe (53, 53 ') that is constantly open to the atmosphere, flowing out of the support and ventilation air channel (24, 24').
    [0009]
    DEVICE according to any one of claims 1 to 7, characterized in that, arranged upstream of the support and ventilation air channel (24) is an air distribution housing (54), in which an air tubing of support (48) opens and from which a ventilation pipe (53) opens, and which is connected with various support and ventilation air pipes (56) to the support and ventilation air channel (24).
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    同族专利:
    公开号 | 公开日
    US20130115324A1|2013-05-09|
    US8794948B2|2014-08-05|
    EP2589481A1|2013-05-08|
    BR102012028016A8|2018-05-15|
    EP2589481B1|2016-01-20|
    CA2794366C|2019-06-04|
    CA2794366A1|2013-05-04|
    PL2589481T3|2016-06-30|
    BR102012028016A2|2014-10-29|
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    法律状态:
    2014-10-29| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2018-05-15| B03H| Publication of an application: rectification|
    2019-08-27| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-05-05| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2020-10-06| B09A| Decision: intention to grant|
    2021-01-05| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 31/10/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP11187934.2A|EP2589481B1|2011-11-04|2011-11-04|Device for continuously manufacturing a composite pipe with connection sleeve|
    EP11187934.2|2011-11-04|
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