• 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:
    1536713 Cooling extruded tubes GENERAL ELECTRIC CO 19 Jan 1976 [28 Feb 1975] 02054/76 Heading B5A An extruded polypropylene tube 16 is cooled and crystallized in passage around a cooled mandrel 22, along which the tube 16 is lubricated and partially cooled by contact with a vapour or liquid, e.g. de-aerated water, drawn along the mandrel 22 by the tube 16 from a space 27 between the upstream end of the mandrel 22 and a seal 24 contacting the interior of the tube and spaced from the downstream face of the extrusion die, and uneven cooling of the table 16 arising from the tube entraining air around the seal 24 from the space 30 between the die and the seal 24, is avoided by continuously delivering the coolant vapour, e.g. steam, into the space 30 so that entrained vapour passes into the space 27. In the Fig. 3 modification, the extruded tube also passes within a surrounding annular cooling member 41; a further seal 37 is provided between the seal 24 and mandrel 22 to define spaces 38 and 40 for circulation of the cooling water; and an external seal 42 is also provided for delivery of cooling fluid into a space 44 between the seal 42 and cooling member 41 to cool the exterior of the tube and to function as a heat transfer and lubricating fluid between the tube and member.
    公开号:SU728696A3
    申请号:SU762330253
    申请日:1976-02-27
    公开日:1980-04-15
    发明作者:Хью Каррико Филип
    申请人:Дженерал Электрик Компани (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the production of tubular products from polymeric materials by extrusion, in particular to methods for cooling tubular polymer preforms and equipment for carrying out the method.
    A known method of cooling a polymeric tubular billet exiting the extrusion head onto a cooled mandrel, followed by cooling in a water bath 1.
    This method allows to obtain a smooth inner surface of the pipe, however, its external diameter is not controlled, and the cooling rate is limited by performance.
    There is also known a method for cooling a polymer tubular billet exiting the extrusion die to a cooled mandrel by successively feeding a gaseous agent and water into the tubular blank 2.
    This method allows to intensify the cooling process and improve performance.
    The method is carried out on the installation containing the ring extrusion
    a head coaxially cooled by the calibrating mandrel and channels for the sequential supply of gas and liquid.
    The disadvantages of the method are the uneven cooling of the tubular blanks and the low quality of the manufactured products.
    The purpose of the invention is to improve the cooling uniformity and the quality of the molds.
    A new method is proposed for cooling a polymer tubular billet emerging from an extrusion head onto a cooled mandrel, the implementation of which is conditioned by the use of a device of a certain new design.
    The method according to the invention differs from the known method of cooling a polymeric tubular billet emerging from the extrusion head onto a cooled mandrel by sequentially feeding a gaseous agent and water into the tubular billet in that the gaseous agent and water are fed into the gap between the extrusion head and the cooled mandrel divided into two successive cavities, in the first of which, as a gaseous agent, the units are condensed when in contact with water, under avaye -. in STOP; / - cavity.
    Such a method can be an OSP that can be installed by installing a new core -: structure and containing col. T, evugO extrusion head, suctioning the cooling head and the channels for the sequential supply of gas and the gas flow meter 1-1,
    The difference in the installation, allowing the zoi to be used: | to implement the proposed tool, lies in the fact that the mouth is}, and when it comes to contact with the internal surface of the workpiece, an annular plate seal is placed between the extrusion head and the cooled Calibrated by the gürn of the nразz. and h.pottings correspondingly communicating with the channels for supplying gas to the gas pipeline. In this case, the seal can be fixed: 7; complete; in the form of a truncated cone, with the larger side facing the ch.d., the curving wall, and its larger diameter exceeds diameter, zorna., and a smaller diameter - less than the diameter: the preformed workpiece.
    FIG. 1 shows the installation, the first view; in Fig „2 - gauge cooled mandrel, cross section; in fig. 3 - consolidation unit.
    The installation contains an extruder 1 with an annular head 2, coaxially cooled by it calibrating the mandrel 3, an annular plate seal 4 located between the extrusion head 2 V with a calibrating mandrel 3, the seal 4 contains an insulating and centering ring 5, which is located between the head 2 and the mandrel 3 and operates as a centering ring for mandrel 3, head 2 and compacting 4. Ring 5 also insulates. Heating the mandrel 3 from head 2 Ushgonenn 4 is a plate or washer plate attached 3 by means of a centering cylinder 6 together with the centering ring 5 "seal 4 is placed matching nonmetallic .plastina type against the lower surface of the plate; washer, 7, washer 7, so that condensation on the bottom surface of the seal 4 is reduced to i HHHrviyMy. The seal 4 forms with the head, the don and the workpiece the cavities A and B, respectively, communicating with the channels 8 and 9 of the gas and liquid supply. The piping 10 serves as a coolant supply to the inside of the mandrel 3. The seal can be made, as shown in FIG. 3, with an additional plate 1. located at some distance from the plate 4 dg: images; channel B for the circulation of fluid that flows through conduit 12 and is discharged
    through the pipeline 13. Such a design allows it to be used for iJiiyipeHHeiO, a tag and for a cooling circuit; tubular blanks.
    ; .u | process in a way oxJt lDanip concludes; in the backward,
    The ear, from the holozgy 2 pipe-ata za1c; tObka 14 with a temperament of about 450 F comes in contact with the plate 4 and slides coaxially over do1e.3. At that time, it’s time for a coarse 9 turns ohpa; must be 5,1 tons inserted into cavity A) between the plyutin seal 4 and the upper section 3. Moving the workpiece -;: 14 on top of the plate; / tight and the mandrel 7 increases the dizziness of the ecOc upward thin; iOi; 3O; n.bi between sg1gotor.koi, turf, cotspay (Serves as a lubricant V-O means for the workpiece, as well as a ravomeric ox 1a) for the film G; or heat transfer medium. The water pressure E is according to the order of A.I.A. A. It must be kept at a minimum to prevent separation of the workpiece from the mandrel and the subsequent loss of effective and even cooling. Under the action of the movement of the workpiece on top of the plate 4 and; from close contact with it, a thin layer of upward movement can occur due to the capillary action, however, there should be some additional pressure effect, a layer of water or a layer of liquid CoctH between the workpiece and the dam, thickness, and it is usually less than 10.0 rvtHJL (0.254 MI), therefore, inside it is very i - .. scarlet pressure:.; s, tending to cause separation of the workpiece from the mandrel or from the plate 4. For this reason, the height of the mandrel not limited to efficient cooling and heat. FROM the polypropylene preform :: (and 14 is transmitted through a layer of liquid and through, Zorn, since the latter is also oh: h: a: -; given by means of cooling fluid circulating through it to pipelines 10
    The method is preferred for a polypropylene capacitor film. The polypropylene film used as a capacitor of a dielectric should be a very pure polypropy grade, with a minimum grade; the number of defects, the minimum number of voids and the minimum irregularity of tolirna.
    tJo the operating time of the proposed installation, it is possible to move the air, located in the cavity B between the compaction seal and the head, the GOSHMO sealing plate, and mixing it with the cooling water. This leakage causes abundant defects on the surface of the polypropylene film, because it interrupts the cooling of those: asge films that are in contact with entrained air. These defects in the workpiece lead to increasing defects in the finished polypropylene sleeve foil film 15 (shown in Fig. 1) obtained after heating and blowing the tubular workpiece 14. The atmosphere of the atmosphere in the cavity B should be the atmosphere of liquid vapor used for cooling. If, for example; the cooling fluid for the mandrel is water, then the cavity B to displace air should be filled with water or steam or preferably mist. The pressure of the vapor atmosphere in cavity B is approximately equivalent to the pressure of the cooling fluid flowing in stripes A. When the penetration of the atmosphere by the sealing plate into cavity B is caused by tube tube 14, the atmosphere, if it is steam, comes in direct contact with cooling water in cavity A, where it immediately condenses. The formation of a bubble in a randomly carried air passing along the mandrel, is completely eliminated or minimized. and eliminating unevenness of cooling i. The cooling of tubular billet 1 in a short section along the axis between the sealing plate and the mandrel is critical. The size of cavity A along the axis should be adjusted within narrow limits. The temperature of the molten polypropylene is about 450 ° F, and boiling water is a gray problem for efficient water cooling. Good results of baking are sintered with a gap of about 10-50 1i (0.254-1.27 mm) with a diameter of the sealing plate about 40 inches (101.6 cm). The preferred form of the plate 4 in accordance with the invention is a truncated cone facing the gauge mandrel with its larger side, the larger diameter G exceeding the diameter of the mandrel, and the smaller diameter D-less than the diameter of the shaped workpiece. With plates with rounded edges, the coolant flowing through cavity A, due to rounding, comes in contact with the tubular workpiece 14 at a greater distance along the axis, part of the liquid between the rounding of the plate and the workpiece 14 is in the groove and does not participate in circulation forming a point of overheating and uneven cooling on this annular surface of the tubular billet. Suitable materials for the layer are polyimides: saturated with carbon and teflon. Since the bottom side of the compaction plate is relatively cold, the vapor condenses to form ai droplets falling on the head and moving. In the cavity of B., in order to finally come into contact with the polypropylene preform, left marks on the final film, therefore, an insulating plate 7 kz of material of a laminated glass type is placed under the plate 4. The size of the dia: -.- heter gasket plate relative to the diameter of the calibrating mandrel tackles plays an important role. The diameter of the sealing plate with a satisfactory performance is about 10 MIL (0.254 mg-t) larger than the diameter of the mandrel. Upwell plates,; which diameters are about 1-2 mils (2.54-10 - 5 g 08-10 mm) larger than the mandrel diameter. Kudtsme give results. Upstate plates, the diameters of which are about 20 ml (50.8–1.0 mm) larger, also provide unsatisfactory results. One of these isn’t doo in lt w 13 s r and tga d gno go de n and stew in that 47: about the heat transfer slows down, that the prI1} sidit to-boiling and the appearance of a spot film. When passing along the mandrel, the billet is significantly compressed, by about 2--3% during its cooling. Such cooling can occur on a totih mandarin caliber with a length of approximately 12–20 inches (approximately 30.5–50.8 cm). In any case, it is advisable to provide some taper along the length of the mandrel. The taper, equal to about 2 mil per 1 inch. 2-10 mm per 10 mm) D.PINY, gave a good result due to the presence of an annular plate seal located between the extrusion head and the calibrating mandrel to be cooled and forming a cavity with THEM and a blank, respectively, with the channel, and for the supply of gas and liquid, is cooled by means of a very thin layer of water, approximately 1 gauge (2, b4). The initial cooling of the tubular billet, when it comes out of the head, occurs very accurately and evenly when the coolant is directed to a specific and adjustable part of the tubular billet surface, which drives the quality of the 1T to obtain products, in particular poly; 1. Method of cooling a polymer tubular oblique, coming out of the extrusion head: -: and, on a cooled mandrel, by directing a gaseous agent i: water supply inside the tubular logger, o and t ,, that, in order to increase the uniformity of the OST 5 oh-oh-hoob, I need a gaseous agent and water
    carried out into the gap between the extrusion head and the cooled mandrel, divided into two successive cavities, in the first of which steam serves as a gaseous agent, which condenses on contact with water supplied to the second cavity,
    2. An installation for carrying out the method according to Claim 1, comprising an annular extrusion die coaxially cooled calibrating mandrel and a channel for sequential supply of gas and liquid, characterized in that, in order to improve the quality of the shaped blanks, the installation is provided with contacting with the inner surface of the blank an annular plate seal located between the extrusion die and the cold end. calibrating the mandrel and forming with them and the preform cavity, respectively communicating with the canal sh for the supply of gas and liquid,
    3. Installation according to claim 2, about tl and, with the fact that the seal is made in the form of a truncated cone, facing more towards the calibrating dog, and its larger diameter exceeds the diameter of the mandrel, and the diameter is less than the diameter of the moldable workpiece.
    Sources of information taken into account in the examination
    1. Griff A, Plastics Extrusion Technologist. M., World, 1965,
    5 s. 48-50, Fig.3.7.V.
    2. USSR author's certificate number 286841, cl. B 29 D 23/04, 1969
    (prototype).
    权利要求:
    Claims (3)
    [1]
    , 'Claim
    1 .. A method of cooling a polymer tubular billet. coming out of the extrusion head, to the cooled mandrel, by sequentially supplying a gaseous agent and water inside the tubular billet, about τ 'l and h a font, which, in order to increase the uniformity of cooling, the gaseous agent and water are fed into the gap between the extrusion head and the cooled mandrel, divided into two successively located cavities, the first of which, as a gaseous agent, steam is condensed upon contact with water supplied to the second cavity.
    [2]
    2. Installation for implementing the method according to claim 1, comprising an annular extrusion head, a coaxial cooled calibrating mandrel and channels for sequential supply of gas and liquid, characterized in that, in order to improve the quality of the molded workpieces, the installation is equipped with a workpiece in contact with the inner surface an annular plate seal located between the extrusion head and cooled by a calibrating mandrel and forming cavities with them and the workpiece, respectively communicating with the gas supply channels and liquids
    [3]
    3. The installation according to claim 2, which means that the seal 3 is made in the form of a truncated cone, with the larger side facing the calibrating mast, and its larger diameter exceeds the diameter of the mandrel, and the smaller diameter is less than the diameter of '9 molded blanks.
    类似技术:
    公开号 | 公开日 | 专利标题
    US4088724A|1978-05-09|External sizing and cooling of extruded tubular profiles of thermoplastic material
    US3920782A|1975-11-18|Sharkskin
    US3996323A|1976-12-07|Method of producing double-walled synthetic plastics tubes having an outer wall with annular or helical corrugations
    JP2574414B2|1997-01-22|Method and apparatus for producing a seamless tube extruded and stretched from a partially crystalline polymer
    FI74654B|1987-11-30|ANALYZING OVER FREQUENCY FRAMING PROCESSING.
    US3400184A|1968-09-03|Process and apparatus for preparing film from thermoplastic resins
    SU728696A3|1980-04-15|Method of cooling polymeric tubular blank and apparatus for effecting same
    US3057013A|1962-10-09|Method for producing pipe
    US6019934A|2000-02-01|Hollow extrusion using internal coolant
    US3210803A|1965-10-12|Plastic tubing extrusion die air ring
    US2863172A|1958-12-09|Apparatus for production of films
    US3144494A|1964-08-11|Manufacture of plastic film and tubing
    US3337663A|1967-08-22|Method for producing thin walled tubings or tubular or flat films from thermoplastic materials, and an apparatus thereof
    US3622657A|1971-11-23|Method for forming and cooling thermoplastic film
    US3385918A|1968-05-28|Extrusion process and apparatus for isotactic polypropylene
    US3108324A|1963-10-29|Method and means for manufacture of biaxially oriented thermoplastic film
    US3187383A|1965-06-08|Method and apparatus for sizing extruded plastic pipe
    US3717426A|1973-02-20|Overpressure external sizing tool
    US4683094A|1987-07-28|Process for producing oriented polyolefin films with enhanced physical properties
    US3532780A|1970-10-06|Method for producing a tubular film or tubes of thermoplastic resin
    JPS6135928A|1986-02-20|Manufacture of thermoplastic resin pipe
    US5354190A|1994-10-11|Device for making tubing foils
    US3491406A|1970-01-27|Die assembly
    US3827214A|1974-08-06|Blowing- and filling thorn
    EP0149335A2|1985-07-24|Apparatus and method for extruding polymer melts
    同族专利:
    公开号 | 公开日
    FR2302190A1|1976-09-24|
    JPS51109958A|1976-09-29|
    GB1536713A|1978-12-20|
    FR2302190B1|1979-08-24|
    FI760329A|1976-08-29|
    FI64533B|1983-08-31|
    US4008022A|1977-02-15|
    FI64533C|1983-12-12|
    JPS5913322B2|1984-03-29|
    DE2602017A1|1976-09-09|
    IT1055896B|1982-01-11|
    US4087504A|1978-05-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2581231A|1948-07-08|1952-01-01|Western Electric Co|Continuous vulcanizing method and apparatus|
    GB901398A|1960-05-19|1962-07-18|British Nylon Spinners Ltd|Improvements in or relating to melt-spinning synthetic polymer filaments|
    US3142092A|1961-04-28|1964-07-28|Hercules Powder Co Ltd|Apparatus for simultaneously extruding and cooling tubular film|
    US3160918A|1961-11-15|1964-12-15|berggren etal|
    US3284552A|1962-10-01|1966-11-08|Fmc Corp|Method for making tubing|
    US3331901A|1963-12-17|1967-07-18|Du Pont|Method and apparatus for condensing volatile components of extruded thermoplastic tubing|
    US3426111A|1964-10-19|1969-02-04|Dow Chemical Co|Method and apparatus for the production of foam plastic sheet|
    FR1490299A|1966-08-25|1967-07-28|Continental Can Co|Cooling cap for continuously extruded plastic tubes|
    US3661482A|1968-08-28|1972-05-09|Stuart L Brown Jr|Apparatus for manufacturing biaxially oriented film with dimensional stability|
    FR2016662A1|1968-08-30|1970-05-08|Du Pont|
    NL6913203A|1968-08-30|1970-03-03|
    US3655846A|1969-04-28|1972-04-11|Kohjin Co|Method and apparatus for making tubular film|
    US3709642A|1970-12-02|1973-01-09|F Stannard|Tube coating film and apparatus|
    GB1422325A|1972-01-19|1976-01-28|Bakelite Xylonite Ltd|Extrusion processes|
    JPS5338306B2|1972-03-31|1978-10-14|
    US3985931A|1973-06-04|1976-10-12|Owens-Illinois, Inc.|Method for the cooling of a tubular extrudate of expanded polystyrene|
    US3871802A|1973-06-04|1975-03-18|Owens Illinois Inc|Dressing ring for tubular expanded polystyrene cooling mandrel|
    US3864444A|1973-09-04|1975-02-04|Mobil Oil Corp|Method of producing a foamed polystyrene sheet having a density gradient decreasing from the external surfaces inwardly|
    DE2357993C2|1973-11-21|1983-11-17|Reifenhäuser KG, 5210 Troisdorf|Device for the internal calibration of hollow profiles made of thermoplastic material|US4112034A|1977-05-05|1978-09-05|General Electric Company|Biaxial film process and rotary apparatus therefor|
    JPH0126329B2|1980-12-12|1989-05-23|Toppan Printing Co Ltd|
    DE3620219A1|1986-06-16|1987-12-17|Hoechst Ag|METHOD FOR PRODUCING BIAXIAL STRETCHED FILMS AND DEVICE FOR IMPLEMENTING THE METHOD|
    NL9400738A|1994-05-04|1995-12-01|Wavin Bv|Method and device for manufacturing biaxially oriented tube from thermoplastic plastic material.|
    NL1005282C2|1997-02-14|1998-08-18|Wavin Bv|Device and method for manufacturing a hollow plastic profile.|
    CN103158250A|2013-03-29|2013-06-19|温州新大自封袋设备有限公司|Polypropyleneself-sealing bag film blowing machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/553,934|US4008022A|1975-02-28|1975-02-28|Thermoplastic tube seal and cooling means|
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