• 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:
    An intermediate stationary member is provided with peripherally disposed and axially inclined melt supplying duct between which extend radial cooling air supply and exhaust ducts connected to concentric supply and exhaust ducts. Between the stationary member and the annular extrusion head is disposed a rotary intermediate ring which is inter-connected with the head and defines and annular melt flow duct which is interrupted by interconnecting webs. Mfg. costs are reduced and quality of tubular foils is improved.
    公开号:SU1046111A1
    申请号:SU797770635
    申请日:1979-06-20
    公开日:1983-10-07
    发明作者:Хелмар Франс；Бодо Трагсдорф
    申请人:Феб Пласт-Унд Эластферарбейтунгсмашинен Комбинат (Инопредприятие)；
    IPC主号:
    专利说明:

    11 The invention relates to a rotating head for blowing a film with cooling of the innermost cavity of the film sleeve, which operates according to the principle of air exchange and central melt supply. This blown film head can be used to make single and multilayer tubular polymeric films. Rotating heads are known for blowing a film with a cooling of the inner cavity of the film sleeve and a central feed of the melt. According to the solution described in VBE-05 laid out description of the invention 261.0335, the air is supplied and discharged to the device for cooling the internal cavity of the film sleeve through the axial concentric channels passing in the mandrel, which enter the bearing ring and are connected through a system of channels with stationary connecting flanges for the supply and removal of the cooling medium. The channel system in the carrier ring consists of central channels passing through the gangways that enter the annular channels located on the outer rings of the housing, the channels for supplying and discharging the cooling medium are displaced relative to each other by volume. rotation, including axial and central channels passing through the gangways. The disadvantage of this film head is that an effective and durable seal between the stationary | MI, annular channels formed in the housing, and rotating, centrally passing, channels through the gangways can only be carried out with great force. Insufficient compaction reflects very negatively on the quality of the film. In addition, it is impossible to completely eliminate the ripple when supplying cooling air. Another disadvantage is that the amount of supplying air chlak is limited by the number and size of the walkways. To produce such a film head, large technical and economic costs are required. A known film head of a corresponding kind (useful sample of FRG 7 3 102), in which the supply and removal of cooling air is solved as follows. 11 2, The entire film head rotates, with separate air-rotating attachments for air supply connected to stationary fans by means of air distribution rings separated by insulated sealing elements, mounted for rotation relative to each other, and the part connected to the fans stationary. However, this film head for blowing a film also has sealing problems between rotating and stationary rings for air distribution. Other disadvantages are the large height of the film head due to the implementation of the air intake and exhaust system and the high technical and economic costs in manufacturing. In the layered description of the invention to the accepted application of EGF 2509024, a known rotating film head for blowing up a film with a central supply of the melt and a device for supplying and discharging a coolant; giving air. The device for supplying and discharging air consists of a central air exhaust pipe, which is surrounded by a concentric air supply pipe. Radial connecting pipes are connected to the inlet and outlet pipes below the annular slotted nozzle head, and they pass to the secondary chambers for air inlet and outlet connected to the rotating annular slotted nozzle head. The auxiliary chambers are connected respectively with a fixed diverting chamber for supplying air or with an assembly chamber for exhausting air. The melt is supplied centrally through the connecting part and passes further into the supplying annular channel of the annular slotted nozzle head through the branched channels in the rotating strip; weft parts and subsequent tubular parts. This film head for blowing a film has the disadvantage that sealing between rotating and stationary chambers is very difficult to carry out. In addition, due to the presence of a blower device, the head sizes increase and the technical and economic costs 310 for manufacturing the head increase. In addition, it is also necessary to carry out the heating of the tubular parts between the annular slotted nozzle head and the spacer part. The aim of the invention is to reduce the technical and economic costs of making a film head, improving the quality of the film and eliminating the problems caused by the leakiness of failures and damage in work, namely the creation of npocToii by constructive construction of a rotating film head for blowing the film to cool the inner cavity of the film sleeve and with a central supply of the melt, In which the system for the supply and removal of air is greatly simplified. This goal is achieved by the fact that the intermediate part is mounted stationary, radial connecting channels for air inlet and outlet, which are connected to axial, concentric to each other, stationary pipes for air inlet and outlet, are located between the star-shaped channels of the melt flow of the star-like alcohol distributor. , and that between the prot of the weft part and the annular slotted head, there is a rotating protruding weft ring, which is connected to the annular slotted head and has An annular melt flow channel interrupted by connecting bridges. Sliding annular sleeves are located between the axial stationary air supply pipe and the rotating mandrel and / or intermediate ring. A sealing ring is installed between the rotating intermediate ring and the stationary intermediate part. A ring gear for transmitting rotational movement is placed on the outer ring of the annular slotted head. FIG. 1 shows a film head for blowing a film, a longitudinal section; in fig. 2 is a section LL in FIG. 1. The film head for blowing films is intended for the manufacture of polymeric tubular films and consists mainly of the connecting part 1, the intermediate part 2, and the weft ring 3 and the annular slotted head C of FIG. one). The annular slotted head consists of a mandrel with screw-type 11 or 4 helical or with a spiral distributor, an outer ring 5, an inner 7 and an outer 6 nozzle ring. The intermediate ring 3 and the ring slit head can be caused to rotate. For this purpose, a crown 8 is placed on the outer ring 5, which engages with a drive (not shown). The intermediate ring 3i x is tightly connected to the outer ring 5 and the mandrel C with helical grooves or with a spiral distributor of the annular slotted nozzle head swiveled on a ball bearing 9. For effective sealing between the stationary and rotating parts of the film head to blow the film between the intermediate part 2 and an intermediate ring 3, a sealing ring 1 G. is installed. The connecting part 1 of the film head for blowing the film is attached to an extruder (not shown). The melt is supplied centrally through the channel 12, which is made in the connecting part. In the intermediate part 2, the channel 12 is divided preferably into four channels 13 of the melt flow, which extend radially outward through the known system: the universal melt distributor O channels 13 of the melt flow, located in The stationary part of the film head for blowing the film passes into a circular 1U channel formed in a rotating slip of the weft ring 3. The circular ring channel It is interrupted by connecting bridge kami 10 which connect the inner and outer rings of the intermediate part 3. The connecting bridge 10 is designed as a perforated plate. It is possible to perform instead of a perforated plate -6 radial bridges or a known trellised box. Immediately after the perforated plate, the circular ring channel 1k passes into the spiral distribution channel 16, which mixes the axial and radial melt flows. A film head for blowing a film is provided with an axial opening extending to an intermediate part 2, in which an air outlet pipe 18 is placed, which concentrically surrounds the air supply pipe 17. These two pipes 17 and 18 are fixed relative to each other by a holder 21.
    The air podood pipe 17 and the air outlet pipe 18 are connected in the upper zone of the intermediate part 2 to radial connecting channels 19 and 20, which are located between the star-shaped channels 13 of the melt flow (Fig. 2) and which by means of flexible pipes are connected to fans for supply and exhaust air (not shown). The entire air intake and exhaust system is fixed permanently for the installation of an axial air inlet pipe 17 relative to the rotating mandrel and intermediate ring 3 between the stationary pipe 17 and the rotating mandrel and / or intermediate ring 3; Sliding annular sleeves 22 are fitted
    The proposed film head for blowing film. Works as follows.
    The melt passing from the extruder through the channel 12 is supplied centrally and divided into star-like channels 13 of the melt flow in the stationary intermediate part 2, passes into the circular channel 14 and through the holes 15 in the perforated plate 10 into the spiral distribution channel 16 before the output screwdriver film head. By supplying air from the melt, emerging in a circular shape, a film sleeve is formed, which is laid flat and wound. A device for cooling the inner cavity of the film sleeve (not shown) is mounted on the annular slotted head, which ensures a constant exchange of air inside the film sleeve. The air is supplied by means of a fan and flexible pipes to the radial connecting channels 19 and passes through the formed axial pipes; Bami 17 and 18 the annular channel to the device cooling the inner cavity of the film sleeve and is sucked through the central tube 18 and the radial connecting channels 20.
    The rotation of the film head for blowing film is carried out through; drive (not shown), which with the help of the gear rim 8 drives the outer ring 5,, sweep (weft ring 3 and Dorn). By means of the sealing ring 11, an effective seal between the stationary intermediate part 2 and the rotating intermediate ring 3 is performed. that when the melt transitions from the melt flow channels 13 to the circular ring channel 14, the melt particles cannot escape from the head.
    The proposed film head for blowing a film creates the possibility of stationary execution of the entire system for supplying and discharging cooling air from the fan to the cooling device of the internal cavity. As a result, it is possible to significantly reduce the cost of manufacturing rotating heads for blowing film with a central supply of the melt and cooling the internal cavity of the film sleeve.
    Air supply to the cooling device of the inner cavity of the film sleeve can be carried out without pulsation, which improves the performance and quality of the film.
    The proposed solution to use in the heads for blowing multi-layer tubular films
    Recognized as an invention according to the results of the examination carried out by the Office for the Invention of the German Democratic Republic,
    fvg /
    FIG. g
    权利要求:
    Claims (4)
    [1]
    1. ROTATING FILM HEAD WITH COOLING THE INTERNAL CAVITY OF THE FILM HOSE AND WITH THE CENTRAL MELT SUPPLY; comprising a connecting part, an intermediate part with star-shaped passage channels for melt flow, an annular slot head and axial concentric pipes for supplying and discharging air, which are connected to radial connecting pipes, characterized in that the intermediate part 2 is mounted stationary between the star-shaped passage channels 13 of the flow of the melt star The spiral distributor has radial connecting channels 19 and 20 for supplying and discharging air, which are connected to axial ntsentricheskimi stationary pipes 17 and 18 for supply and discharge of air, and between the intermediate portion 2 and an annular slot die taken by rotating the intermediate ring 3, which is connected to an annular slot die and is interrupted by bridges 10 connecting krugokoltsevoy melt flow channel 14.
    [2]
    2. Film head according to π. 1, characterized in that between the axial stationary pipe VJ for air supply and the rotary section 4 of the mandrel 4 and / or the rotating intermediate ring 3, sliding annular * bushings 22 are located.
    [3]
    3. The film head according to paragraphs. 1 and 2, characterized in that between the rotating intermediate ring 3 and the intermediate part 2 is installed a sealing ring 11.
    [4]
    4. The film head according to paragraphs. 1-3, characterized in that the ring gear 8 for transmitting rotational motion is placed on the outer ring 5 of the annular slot head.
    SU „., 1046111
    类似技术:
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    同族专利:
    公开号 | 公开日
    RO83006B|1984-09-30|
    DD137553A1|1979-09-12|
    DE2915835A1|1980-01-17|
    DD137553B1|1980-12-10|
    CS231251B1|1984-10-15|
    DE2915835C2|1983-12-22|
    RO83006A|1984-08-17|
    HU186358B|1985-07-29|
    BG32598A1|1982-09-15|
    YU157479A|1982-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2500532C2|2008-09-23|2013-12-10|Криовак, Инк.|Female die, system and method for joint extrusion of multiple fluid layers|DE1729129A1|1968-03-18|1971-06-09|Windmoeller & Hoelscher|Film die head for the production of tubular films|
    US3933958A|1971-03-22|1976-01-20|Reynolds Metals Company|Method of making tubular plastic film|
    DE7412102U|1974-04-05|1975-12-11|Windmoeller & Hoelscher|Rotatable film die head for the production of tubular films from thermoplastic masses|
    DE2445545A1|1974-09-24|1976-04-01|Windmoeller & Hoelscher|FILM BLOW HEAD FOR THE MANUFACTURE OF TUBULAR FILM|
    DE2509024C3|1975-03-01|1985-04-25|Reifenhäuser KG, 5210 Troisdorf|Device for the production of plastic films by blowing|
    DE2610335A1|1975-04-23|1976-11-04|Plast Elastverarbeitungsmasch|FILM BLOWING TOOL|DE3326870C2|1982-09-02|1987-04-16|Veb Kombinat Umformtechnik "Herbert Warnke" Erfurt, Ddr 5010 Erfurt, Dd|
    DE3481901D1|1983-03-11|1990-05-17|Mobil Oil Corp|SINGLE-LOBED ROTATING NOZZLE.|
    US4784594A|1983-03-11|1988-11-15|Mobil Oil Corporation|Single lip rotary tubular extrusion die|
    DE3331832C1|1983-09-03|1985-01-10|Reifenhäuser GmbH & Co. Maschinenfabrik, 5210 Troisdorf|Vertical working die head|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD20658478A|DD137553B1|1978-07-07|1978-07-07|ROTATING FILM BUBBLE TOOL WITH FILM INNER COOLING|
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