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Nozzle plate having nozzles disposed convexly and the use of the same

A technology of nozzle plates and nozzles, which is applied in spinneret assemblies, textiles and papermaking, etc., can solve the problems that do not allow the improvement of production capacity and operation reliability, and achieve consistent discharge speed, reduced discharge speed, and uniform pressure distribution effect

Active Publication Date: 2012-04-11
AKRO PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Finally, nozzle holes are known from RU 2205 104 C1, the openings of which are arranged on a circular arc, but the nozzles themselves are arranged in parallel, so that the extruded wires run parallel as in conventional devices and thus do not allow Improvements in capacity and operational reliability

Method used

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  • Nozzle plate having nozzles disposed convexly and the use of the same
  • Nozzle plate having nozzles disposed convexly and the use of the same
  • Nozzle plate having nozzles disposed convexly and the use of the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0054] A concave and convex nozzle plate is installed, including 41 nozzles in a single row, and the productivity of the preceding twin-screw extruder is 1700kg / h. The discharge speed of the wire granulator following the wire cooling bath and the wire drying section was 120 m / min.

[0055] Result description:

[0056] The discharged wires have almost the same diameter of 3.4-3.8 mm due to a more uniform pressure distribution of the melt in the concave nozzle plate cavity.

[0057] The wire pelletizer was run at 120 m / min, ie 85% of its maximum discharge speed.

[0058] The running behavior of the wire is calm and uniform without wire breakage.

example 2

[0060] The nozzle plate of Example 1 was again installed, comprising a single row of 41 nozzles. The productivity of the preceding twin-screw extruder is 2000kg / h. The discharge speed of the wire granulator following the wire cooling bath and the wire drying section was 140 m / min.

[0061] Result description:

[0062] The emerging wires again have almost the same diameter of 3.4-3.8 mm due to a more uniform pressure distribution of the melt in the concave nozzle plate cavity.

[0063] Due to the higher production capacity, the wire pelletizer is now operating as in comparative example 1 at 140 m / min, ie 100% of its maximum discharge speed.

[0064] The running behavior of the wire is calm and uniform.

[0065] Compared to a single-row flat nozzle plate with 36 holes, the number of nozzles can also be increased to 45 holes by using a concave-convex design, until the discharged wires are likewise at a distance of about 5 mm from each other (see comparative example 1). In the...

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PUM

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Abstract

The invention relates to a concave-convex nozzle plate (4) having an arrangement of the nozzles (3) on the convex side. Said nozzle plate and an extrusion device (2) equipped therewith is suitable for extruding plastic melts in strand granulation.

Description

technical field [0001] The invention relates to a concave-convex nozzle plate, in which a plurality of nozzles are arranged on a convex side, which is suitable for extruding a melt, for example in wire pelletizing. The invention also relates to the use of the nozzle plate for extruding a melt, a corresponding method when using the nozzle plate, and an extrusion device equipped with the nozzle plate. Background technique [0002] Nozzle plates for extrusion devices are known in a wide variety from plastics processing. The liquefied plastic material is extruded through the nozzle plate, which is processed, for example, according to the continuous casting method. [0003] In order to increase the economy, an increase in the production capacity of the extrusion device is basically required here. The main limiting feature to achieve increased throughput is the arrangement and number of nozzles in the nozzle plate in the extruder head. The number of nozzles cannot be increased ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/30B29B9/06D01D4/02B29C48/345B29C48/04B29C48/05
CPCB29C47/0011B29C2947/92704B29B9/06B29C47/92B29C2947/92514D01D4/02B29C47/30B29C2947/9258B29C2947/92619B29B9/065B29C48/92B29C2948/92704B29C48/04B29C48/345B29C2948/92514B29C2948/9258B29C2948/92619B29C48/05B29B7/582
Inventor J·维尔特
Owner AKRO PLASTIC
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