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CN-121989428-A - Barrel of screw extruder for recycling plastic particles

CN121989428ACN 121989428 ACN121989428 ACN 121989428ACN-121989428-A

Abstract

The invention provides a cylinder of a regenerated plastic particle screw extruder, which belongs to the technical field of plastic extrusion equipment and comprises a cylinder and a feeding channel, wherein a plurality of first inner lining rings which are sequentially distributed along the axial direction are embedded in the inner wall of one end of the cylinder, a plurality of spiral grooves are formed in the inner wall of the first inner lining rings, the rotation direction of the spiral grooves is opposite to that of the spiral grooves of the screw of the extruder, a first annular groove is formed between the outer side of the first inner lining rings and the cylinder and is connected with a cooling water circulation unit, a second inner lining ring is arranged between the adjacent first inner lining rings, and a second annular groove is formed between the outer side of the second inner lining rings and the cylinder and is connected with a heating medium circulation unit. The invention forms a reverse shearing effect in the feeding section through the reverse spiral groove structure, effectively increases the retention time and compaction degree of materials, prevents slipping and wearing, maintains the materials in a micro-melting state through the temperature control layout of cold and hot alternation, ensures smooth conveying, and simultaneously further cooperatively reduces wearing, and the lining ring is detachable and replaceable, so that the maintenance cost is low.

Inventors

  • ZHU HAO
  • LI BINBIN
  • CHEN JISHAN

Assignees

  • 徐州嘉昂自动化设备有限公司

Dates

Publication Date
20260508
Application Date
20260407

Claims (10)

  1. 1. A barrel of a screw extruder for recycling plastic particles, comprising: A feeding port (101) is formed in the side wall of one end of the machine barrel (1); a charging channel (11) which is positioned at the charging port (101) and is fixedly connected to the machine barrel (1); the inner wall of one end of the machine barrel (1) positioned at the charging port (101) is embedded with a plurality of first lining rings (2), the plurality of first lining rings (2) are sequentially arranged along the axial direction of the machine barrel (1), the inner wall of the first lining rings (2) is provided with a plurality of spiral grooves (202), and the spiral directions of the spiral grooves (202) are opposite to the spiral directions of the spiral grooves of the extruder screw; A first annular groove (201) is formed between the outer side wall of the first lining ring (2) and the inner side wall of the machine barrel (1), and a cooling water circulation unit communicated with the first annular groove (201) is installed on the machine barrel (1), so that cooling water flow is formed in the first annular groove (201).
  2. 2. The cylinder body of the regenerated plastic particle screw extruder according to claim 1, wherein a second lining ring (3) is arranged between two adjacent first lining rings (2), a second annular groove (301) is arranged between the outer side wall of the second lining ring (3) and the inner side wall of the cylinder body (1), and a heating medium circulation unit communicated with the second annular groove (301) is arranged on the cylinder body (1) so as to enable flowing heating medium to be formed in the second annular groove (301).
  3. 3. The barrel of the screw extruder for recycling plastic particles according to claim 1, wherein the depth of the spiral groove (202) gradually decreases from the inlet end to the outlet end of the first inner lining ring (2).
  4. 4. The cylinder of the screw extruder for recycling plastic particles, as set forth in claim 1, characterized in that the cooling water circulation unit comprises a water chiller and two groups of first connecting pipes (5), the number of the first connecting pipes (5) in each group is the same as that of the first ring grooves (201), the water delivery end and the water return end of the water chiller are respectively connected with the two groups of first connecting pipes (5), and the two groups of first connecting pipes (5) are both installed on the cylinder (1) and are respectively communicated with the first ring grooves (201).
  5. 5. The cylinder of a screw extruder for regenerating plastic granules according to claim 4, wherein two sets of said first connecting pipes (5) are respectively located at both ends of the cylinder (1) in the radial direction.
  6. 6. The cylinder of the screw extruder for recycling plastic particles according to claim 2, wherein the heating medium circulation unit comprises a medium heater and two groups of second connecting pipes (6), the number of the second connecting pipes (6) in each group is the same as that of the second annular grooves (301), the conveying end and the reflux end of the medium heater are respectively connected with the two groups of second connecting pipes (6), and the two groups of second connecting pipes (6) are respectively arranged on the cylinder (1) and are respectively communicated with the second annular grooves (301).
  7. 7. The cylinder of the screw extruder for regenerating plastic granules according to claim 6, wherein two groups of the second connecting pipes (6) are respectively positioned at two radial ends of the cylinder (1).
  8. 8. The cylinder of the regenerated plastic particle screw extruder according to claim 2, wherein a third inner lining ring (4) is embedded in the inner wall of the cylinder (1) positioned at the feeding hole (101), the third inner lining ring (4) is positioned right below the feeding hole (101), and a blanking hole (401) corresponding to the feeding hole (101) is arranged on the third inner lining ring (4).
  9. 9. The cylinder of the screw extruder for recycling plastic particles, as set forth in claim 8, characterized in that an installation groove (102) is provided on an inner wall of one end of the cylinder (1) located at the feed inlet (101), and the first inner lining ring (2), the second inner lining ring (3) and the third inner lining ring (4) are detachably connected in the installation groove (102).
  10. 10. The cylinder of the regenerated plastic particle screw extruder according to claim 1, wherein a base flange (12) is fixed at one end of the cylinder (1) positioned at the feeding port (101), and a head flange (13) is fixed at the other end of the cylinder (1).

Description

Barrel of screw extruder for recycling plastic particles Technical Field The invention belongs to the technical field of plastic extrusion equipment, and particularly relates to a cylinder of a regenerated plastic particle screw extruder. Background The recycling of plastic is to recycle waste plastic products after sorting, cleaning and crushing, and a screw extruder is core equipment in the regeneration process. The method comprises the steps of using a motor-driven screw rod to rotate in a heated charging barrel, carrying out strong conveying, melting and mixing on broken plastics, finally extruding the broken plastics into continuous strips through a die head, and cooling and granulating the continuous strips to obtain regenerated plastic particles which can be directly used in processes such as injection molding or blow molding. The cylinder of the screw extruder is tightly matched with the screw, so that a closed space required by the plasticizing process is formed. The plastic shearing machine has the functions of providing a pressure-bearing container for conveying, compacting, melting and mixing plastics, and shearing, melting and mixing materials by matching with a screw. At present, the abrasion problem easily occurs in the long-term operation process of the machine barrel, particularly in a charging section, solid materials in the charging section are in an unplasticized or semi-plasticized state, the friction force between the solid materials and the inner wall of the machine barrel is large along with the high-speed rotation of a screw rod, the abrasion is serious, the gap between the screw rod and the machine barrel is overlarge along with the continuous operation of equipment, the phenomena of melt leakage, poor plasticization and the like are caused, and the production quality is reduced. Disclosure of Invention In view of the foregoing, it is an object of the present invention to provide a cylinder of a screw extruder for recycling plastic particles, which at least partially solves the problems set forth in the background art. The invention provides a cylinder of a screw extruder for recycling plastic particles, which comprises the following components: a charging hole is formed in the side wall of one end of the machine barrel; the feeding channel is positioned at the feeding opening and is fixedly connected to the machine barrel; The inner wall of one end of the machine barrel, which is positioned at the charging port, is embedded with a plurality of first lining rings, the plurality of first lining rings are sequentially distributed along the axial direction of the machine barrel, the inner wall of each first lining ring is provided with a plurality of spiral grooves, and the spiral directions of the spiral grooves are opposite to the spiral directions of the spiral grooves of the screw rod of the extruder; A first annular groove is arranged between the outer side wall of the first lining ring and the inner side wall of the machine barrel, and a cooling water circulation unit communicated with the first annular groove is arranged on the machine barrel, so that cooling water flow is formed in the first annular groove. Further, a second inner lining ring is arranged between two adjacent first inner lining rings, a second annular groove is arranged between the outer side wall of the second inner lining ring and the inner side wall of the machine barrel, and a heating medium circulation unit communicated with the second annular groove is arranged on the machine barrel so that flowing heating medium is formed in the second annular groove. Further, the depth of the spiral groove gradually decreases from the inlet end to the outlet end of the first liner ring. Further, the cooling water circulation unit comprises a water chiller and two groups of first connecting pipes, the number of each group of first connecting pipes is the same as that of the first annular grooves, the water delivery end and the reflux end of the water chiller are respectively connected with the two groups of first connecting pipes, and the two groups of first connecting pipes are respectively installed on the machine barrel and are respectively communicated with the first annular grooves. Further, the two groups of first connecting pipes are respectively positioned at two ends of the machine barrel in the radial direction. Further, the heating medium circulation unit comprises a medium heater and two groups of second connecting pipes, the number of each group of second connecting pipes is the same as that of the second annular grooves, the conveying end and the backflow end of the medium heater are respectively connected with the two groups of second connecting pipes, and the two groups of second connecting pipes are respectively installed on the machine barrel and are respectively communicated with the second annular grooves. Further, two groups of second connecting pipes are respectively positioned at two ends of the ma