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PVC casting film production line adopting planetary screw extruder

A technology of planetary screw and cast film, which is applied in the production line of PVC cast film produced by planetary screw extruder, to achieve the effect of improving mixing and plasticizing effect, increasing output and saving energy

Inactive Publication Date: 2015-09-30
北京华腾佳和科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a production line for producing PVC cast film with a planetary screw extruder to solve the shortcomings of the prior art

Method used

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  • PVC casting film production line adopting planetary screw extruder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The production line includes the following parts and working processes:

[0016] 1) Feeding device: The mixed powdery or granular plastic is transported to the inlet of the pushing section of the extruder through the feeding device on the hopper;

[0017] 2) Planetary screw extruder: The pushing section of the planetary screw extruder sends the plastic from the hopper into the plasticizing section. The plasticizing section is the core component of the planetary screw extruder. There is heating oil, and its temperature can be adjusted according to different types of plastics. The plastic entering the plasticizing section undergoes extrusion, shearing, mixing and heating during the rotation of the main screw and the planetary screw, and becomes molten when it reaches the discharge end of the planetary extruder.

[0018] 3) Screw melt pump: It plays the role of stabilizing and building pressure, providing stable extrusion pressure and stable flow rate for the melt.

[00...

Embodiment 2

[0024] Embodiment 2: (do not comprise bidirectional stretching process), this production line comprises following part and work process:

[0025] Feeding device: The mixed powder or granular plastic is delivered to the inlet of the pushing section of the extruder through the feeding device on the hopper.

[0026] 2) Planetary screw extruder: The pushing section of the planetary screw extruder sends the plastic from the hopper into the plasticizing section. The plasticizing section is the core component of the planetary screw extruder. There is heating oil, and its temperature can be adjusted according to different types of plastics. The plastic entering the plasticizing section undergoes extrusion, shearing, mixing and heating during the rotation of the main screw and the planetary screw, and becomes molten when it reaches the discharge end of the planetary extruder.

[0027] 3) Screw melt pump: It plays the role of stabilizing and building pressure, providing stable extrusio...

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Abstract

The invention discloses a PVC casting film production line adopting a planetary screw extruder. The PVC casting film production line comprises the planetary screw extruder, wherein the planetary screw extruder uses a central screw as the driving screw, multiple small-diameter screws at the periphery of the central screw are rotatably engaged with the central screw, and an outer gear sleeve with spiral teeth at the inside is arranged at the periphery of each small screw and is engaged with the small screw, so that when the central screw rotates, the small screws can revolve as well as rotate around the central screw. According to the PVC casting film production line, the mixing and plastifying effect of raw plastic materials can be improved, the quality of a thin film product can be elevated, the yield can be increased, the energy can be saved and the cost can be lowered; by using a screw melt pump on the production line, the material plastified through the planetary screw extruder can be stably conveyed to a nose and the functions of plastifying, mixing, pressure building and stabilizing can be further realized; a high melt pressure can be provided through the screw melt pump and the screw melt pump is corrosion resistant, and the melt pressure and flow rate can be stabilized; the planetary screw extruder and the screw melt pump are used for PVC casting film production, the respective advantages can be exerted and the two are a perfect combination.

Description

technical field [0001] The invention relates to a production line, in particular to a production line for producing PVC casting films with a planetary screw extruder. Background technique [0002] The production process of PVC cast film is described as follows: powdery or granular PVC plastic, according to the needs of product production and processing, add various additives, fillers, pigments, etc., through the mixing, extrusion, shearing of planetary screw extruder , Heating effect, making it into a molten flow state, the melted plastic is extruded and transported by the screw melt pump, extruded from the die of the cast film machine head in sheet form, and the plastic sheet is stretched, cooled, trimmed , coiling and other station processes become PVC cast film. The PVC cast film production line in the prior art has defects such as low film product quality, large energy consumption and high production cost, and cannot meet people's needs. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/42B29D7/01
CPCB29C48/425B29C48/435B29L2007/00
Inventor 刘强
Owner 北京华腾佳和科技有限公司