• 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:
    The invention relates to a loading device for machines for processing plastics of thermo-and thermo-plastics with a small bulk density and m. B. used in extruder type machines. The aim of the invention is to increase the filling rate of a machine for processing when loaded with a low density material. The loading device contains a feed hopper, a feed cylinder with a feed, a screw, and a cylindrical shell with inlet and outlet pipes for purging gas placed around the feed cylinder to form between them a working channel with a guide coil placed in it. The feeding cylinder is made in the form of a series of cylindrical rings, separated by centering rings with gaseous holes and spacer washers with the formation of conical annular slots extending to the outer surface. During operation, the material of low bulk density with a large number of air inclusions is compressed by the feed screw. The air from the material during its compression is removed through the annular slots in the wall of the feed cylinder, while the dust-like particles of the material are retained by the cylindrical shell. To remove dust particles of the material, purge gas inlet-outlet connections are provided that transport the particles of material back to the feed hopper. Purposeful flow of purge gas is provided by a guide coil. Removing airborne inclusions in the feed cylinder in the precompaction zone improves the efficiency of degassing, the degree of filling of the machine cylinder and the quality of the product to be extruded. 1 hp f-ly, 1 ill. I (L with about JV About with
    公开号:SU1305049A1
    申请号:SU827772577
    申请日:1982-08-11
    公开日:1987-04-23
    发明作者:Йарауш Ханс；Шрейтер Зигфрид
    申请人:Феб Комбинат Текстима (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to a loading device for machines for the processing of plastics, especially an extruder, for the preparation and loading of thermo- and thermo-plastics with a low bulk weight.
    In the process of preparing or processing plastics, it is necessary to achieve the best quality of the extrudate and exclude the inclusion of air and shrink holes in the molten state of the mass.
    It is known that the proportion of air inclusions in plastics with a small bulk weight equal to or less than 0.8 g / cm is relatively large, so that to remove air that is in the melt, the mass of the melt must be carried out through appropriate degassing extruder holes. Another possibility of degassing is that a vacuum degassing device is attached to the charging device and, thus, air is trapped in the plastic mass. Both devices for carrying out the degassing process can work separately and together.
    The process of mass degassing in the molten m state without a vacuum device creates the most significant removal of volatile components in the plastic material, but leads to a decrease in machine performance, since due to the mixture of solid material with air in the loading zone, an elastic underwater formation occurs. it is difficult to obtain a continuous melt output due to extruder pulsation.
    The combination of cylinder degassing and vacuum degassing in the loading zone eliminates this drawback, but it requires significant technical costs to compact the loading device, to prepare and provide appropriate instruments and tools.
    Plastics with a bulk weight less than 0.8 g / cm require special measures that prevent powdered particles from being carried along with the air to be removed and whether the vacuum device is clogged.
    Known loading deviceSDD-VP 60 640, cl. 39 a 3/00, 1970), which has a vacuum device.
    Despite the fact that for certain technological tasks there is an inevitable degassing in the molten state of the mass, the vacuum applied to the loading device counteracts the ability to load powdered plastics and significantly limits the degree of filling of the plasticizing screws.
    The closest in technical essence to the proposed device is a loading device for machines for processing plastics such as extruders (ed.
    St. USSR № 718289, cl. B 29 F 3/03, 1978) containing a feed funnel mounted on the extruder cylinder with a feed cylinder and a feed screw mounted therein and a cylindrical shell equipped with a gas outlet pipe and placed around the feed cylinder with the formation of a working channel with a screw-shaped channel system between them for exhaust gas.
    The purpose of the invention is to increase the filling rate of a machine for processing when loaded with a low density material. It is necessary, when loading, to reduce the technical expenditure on the conduct of degassing of plastics with a small bulk of weight,
    improve the quality of the extrudate, as well as improve performance by stabilizing the extrusion process.
    The object of the invention is to create a worm screw charging device that removes air inclusions in the pre-compacted zone of the plastic in the feed cylinder, and to increase the degree of filling of the plasticization system.
    According to the invention, the solution of the problem
    5 provides for the loading device to be equipped with a feed cylinder, which, due to the arrangement of narrow annular slots in its wall, is breathable. The feed cylinder is made of a single centering ring, remote from
    0 flanges located at the ends of the feed cylinder in such a way that there is an annular gap in the wall of the cylinder. The center1. Ring has radial gas outlet openings for air removal located along the perimeter. The flanges located at the ends of the feed cylinder are interconnected by means of bolts. The cylindrical ring has an asymmetrical cross section, due to which the conic expansion of the collar of the slit in the outer side is possible.
    The expansion of the gap is directed in the opposite direction to the flow of plastic mass. The width of the annular gap can be set by mounting at least one spacer
    5 washers between the cylindrical and centering ring in accordance with the grain size of the plastic material.
    A cylindrical shell arranged between the flanges. With shells for supplying and discharging the purge gas (air) surrounds the feed cylinder, while the return flow pipe connected to the outlet pipes is directed to the feed funnel. For uniform blow-down of the feed cylinder of its cylinder, a guide coil is located between the feed cylinder and the shell.
    According to the invention, the advantages of the boot device are not
    significant technical costs of conducting the degassing of plastics with a small bulk density, when carrying out the process of loading extruders, a stable extrusion process with a high discharge capacity and improving the quality of the extrudate.
    The drawing shows the boot device, the cut.
    The loading device is located at the loading opening of the cylinder of the extruder 1. For loading the extruder 1, the loading funnel 5 is filled with available plastic in the form of a powder or agglomerate with a low bulk weight and to increase the filling rate of the screw 2 of the extruder 1 it is pre-compacted using a feed tube 1 ka 4 into the supply cylinder 3.
    In the feed cylinder 3, made in the form of an air-permeable cylinder, the air contained in the plastic is removed by pre-compression by the feed screw 4. The feed cylinder 3 for this purpose is made of p; 1, and the cylindrical rings 9, which are due to the centering rings 1 with radial gas outlet openings 12 d.h of degassing, located along the perimeter in this way, one relative to the other, that between the cylindrical rings 9 there are narrow conical annular slots 10 which help to remove air ear made of plastic material in the process of pre-compression.
    Using flanges 6 and 7 and bolts 8, the cylindrical rings 9 and the centering rings 1 1 are interconnected.
    The cylindrical rings 9 have an asymmetrical cross-section in such a way that there is a conical expansion to the outer side of the annular gap 10.
    The expansion of the annular slit 10 to prevent dust particles from being captured or removed from the plastic mass in the process of removing air from the plastic mass is directed in the opposite direction to the feed direction of the feed screw 4. Another measure for removing air and preventing dust particles from escaping during the air removal process is change the width of the annular gap 10 so that the spacer washers 13, having a certain thickness and located between the cylindrical rings 9 and the centering rings 11, could be replaced by each by them. The cylinder 3 is surrounded by a cylindrical shell 14 located between the flanges 6 and 7, which is equipped with a pipe 16 for supplying the purge gas (air) and a gas outlet pipe 18 with a return feed pipe 19 to the feed funnel 5. The pipe 16 is connected to the purge gas source 17 .
    In the working channel between the feed cylinder 3 and the cylindrical shell 14 there is a spiral channel system in the form of a stationary guide helix 15, which produces an even distribution of the flow of purge air around the feed cylinder 3 so that during the exhaust of air from plastics from the openings 12 for exhaust air Entering the dust particles through the return feed pipe 19 back into the feed funnel 5.
    20
    权利要求:
    Claims (2)
    [1]
    1. Loading device for machines
    plastics type extruder processing, containing a feed funnel mounted on the extruder cylinder with a feed cylinder and a feed screw mounted therein and a cylindrical shell equipped with a gas outlet and placed around the feed cylinder to form between them a working channel with a screw-shaped channel system for exhaust gas, characterized by the fact that, in order to increase the filling rate of the processing machine when the material is loaded with low density, the feed cylinder is designed as a series of cylindrical solid rings with asymmetrical cross-section, separated by centering rings with gaseous
    openings and spacers to form conical annular slots extending to the outer surface of the supply cylinder in the wall of the supply cylinder, the spacer washers being installed with the possibility of their replacement to adjust the width
    annular cracks.
    [2]
    2. A device according to claim 1, characterized in that the cylindrical shell is provided with a purge gas supply pipe to the working channel, and the screw-shaped channel system is designed as a stationary-mounted guide helix with screw-shaped guide surfaces.
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    同族专利:
    公开号 | 公开日
    DE3227983A1|1983-03-17|
    CS596682A1|1985-06-13|
    CS245044B1|1986-08-14|
    DD206646A3|1984-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4318137A1|1993-06-01|1994-12-08|Herbert Stork|Extruder for plastics reprocessing materials|
    DE3248659A1|1982-12-30|1984-07-05|Peroxid-Chemie GmbH, 8023 Höllriegelskreuth|DEGASSING DEVICE ON A SCREW EXTRUDER OR THE LIKE|
    US5783225A|1993-12-21|1998-07-21|Bacher; Helmut|Apparatus for processing thermoplastic synthetic plastics material|
    EP0735945B1|1993-12-21|1997-04-02|BACHER, Helmut|Device for processing thermoplastic materials|
    DE102014002209B4|2013-10-11|2016-11-24|Blach Verwaltungs Gmbh & Co. Kg|Device for side stream feeding of an extruder|
    EP3053725A1|2015-02-06|2016-08-10|LANXESS Deutschland GmbH|Plug screw|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD81233186A|DD206646A3|1981-09-10|1981-09-10|FEEDING DEVICE FOR PLAST-PROCESSING MACHINES, ESPECIALLY EXTRUDER|
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