Production of containers with recycling by twin-screw extruder

A twin-screw extruder, the technology of the extruder, which is applied in the field of container production with recycling through twin-screw extruder, can solve the problem that the extruder is difficult to be compatible with high-quality production, PET is not suitable for end use, and it is difficult to mold. and blow molding hollow objects to achieve high economic efficiency and commercial potential, low dispersion of shear and deformation ratios, and high productivity

Active Publication Date: 2020-09-18
SIDEL PARTICIPATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Furthermore, melting and transformation processes in the molten phase lower this index and too strong a degradation makes the use of PET unsuitable for its end use
[0020] Furthermore, the use of extruders has proven in practice to be incompatible with high-quality production, and it is difficult to mold and blow hollow objects such as PET bottles at industrial rates

Method used

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  • Production of containers with recycling by twin-screw extruder
  • Production of containers with recycling by twin-screw extruder
  • Production of containers with recycling by twin-screw extruder

Examples

Experimental program
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Effect test

Embodiment Construction

[0075] therefore, figure 2 with image 3 is a schematic diagram of a twin-screw extruder.

[0076] In the shown example of a twin-screw extruder 1, the following components are assembled on a single frame ( figure 2 ):

[0077] - screw-jacket assembly 5 with heating and cooling fittings;

[0078] - a drive group 7 comprising components which may include reduction gears, torque dividers and limiters, and the main electric motor;

[0079] - equipment 9 for material feeding (in particular metering hoppers) or for its treatment (eg degassing equipment);

[0080] - and for operating the extruder, the control cabinet 13 combines the motor converter, the starting and safety mechanisms, the regulating, commanding, displaying and measuring equipment.

[0081] The frame may be a simple support for the mechanism described above; but it may also include sheath opening means to allow access to the screws for cleaning, inspection or maintenance.

[0082] Screw-sheath assembly ( im...

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PUM

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Abstract

The invention relates to the manufacture of hollow objects made of plastic material by means of an extruder. To improve the quality of the objects manufactured and the manufacturing regularity, the extruder (1) which is supplied at least with the initial proportioned mixture (65) and towards which at least one portion of the moulded blanks and/or the blanks that are moulded and then heated in order to manufacture said objects and/or the finally manufactured objects are recycled (via 55), is a twin-screw extruder.

Description

technical field [0001] The invention relates to the manufacture of containers made of plastic material by means of an extruder. Background technique [0002] For the manufacture of eg bottles, it is known to proceed discontinuously by blow molding, which is a process by molding a thermoplastic polymer material such as polyethylene terephthalate (PET) into shape. [0003] The process consists of two stages: [0004] - using the retained fluid plastic material to form an extruded blank, usually a tube, made of plastic; [0005] - Then, in the blow mould, a compressed gas (eg air) is injected inside the preheated shaped blank. The material stretches, compresses the mold cavity and conforms to its shape. [0006] After cooling, the mold is opened and the part is ejected. [0007] Currently, it is known to manufacture hollow objects, such as containers of plastic material, by means of extruders: [0008] - separately metering the amount of raw plastic material and the amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/06B29C49/00B29C48/40B29C49/28B29B17/00B29K67/00B29L31/00B29C48/405
CPCB29L2031/7158B29B17/00B29K2067/003B29C49/0005B29C49/06B29C49/28B29C48/405Y02W30/62B29C2049/023B29B17/0026
Inventor Y-A·杜克洛
Owner SIDEL PARTICIPATIONS SAS
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