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A large cone twin extruder foaming screw

A technology of extruder and screw, which is applied in the field of foaming screw of large conical double extruder, which can solve the problem that the output of the extruder cannot meet the requirements of the market, and achieve the effects of shortening the heat conduction distance, improving efficiency and reducing stress

Active Publication Date: 2020-11-17
SHANGHAI JINHU EXTRUSION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the largest conical twin-screw extrusion equipment in China is SJZ80 / 156 conical twin-screw extruder, and its output is about 250kg / h, but the output of this extruder can no longer meet the requirements of the market. Research on large conical twin-screw extruders Foam extruder is the trend of social development in the future

Method used

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  • A large cone twin extruder foaming screw
  • A large cone twin extruder foaming screw
  • A large cone twin extruder foaming screw

Examples

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Embodiment 1

[0031] A large extruder foaming cone twin screw, such as figure 1 As shown, it consists of left screw and right screw, including feeding section 1, compression section 3, metering section 4, exhaust section 5 and mixing section 6, and also includes pre-compression section 2 and dynamic mixing head 7, pre-compression section 2 is set between the feeding section 1 and the compression section 2, the dynamic mixing head 7 is set at the end of the mixing section 6, the left screw and the right screw are in the feeding section 1, pre-compression section 2, compression section 3, metering section 4 , The exhaust section 5 and the mixing section 6 are provided with screw ribs 10 that mesh with each other, and screw grooves 9 are formed between adjacent screw ribs 10 (refer to Figure 4 ), the width of the screw groove 9 is the pitch, and the dynamic mixing head 7 is provided with mutually engaging bumps 8 (refer to image 3 ), the bumps 8 are long blocks, the bumps 8 are arranged in ...

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Abstract

The invention relates to a large-scale extruder foaming cone double screw comprising a feeding section, a compression section, a metering section, an exhaust section, a mixing section, a pre-compression section and a dynamic mixing head; intermeshing screw flights are arranged in the feeding section, the pre-compression section, the compression section, the metering section, the exhaust section and the mixing section; and screw grooves are formed between the adjacent screw flights, and the dynamic mixing head is provided with intermeshing convex blocks. Compared with the prior art, according to the large-scale extruder foaming cone double screw, the compression section is separated into the pre-compression section and a compression section, the aspect ratio of the screw is improved and theresidence time of materials is prolonged, the efficiency of heat control during the processing is improved, and the plasticization of the materials is completed with minimum stress; by arranging thedynamic mixing head, quantity of heat of the materials when the materials are extruded from the screw is reduced, the temperature of the materials can be effectively prevented from rising due to shearheat, and the precipitation of foaming gas to the surface of the materials is reduced; the length of the cone double screw and the diameter of the screw are extended, the screw volume and surface area are increased to enable the interior of the screw to accommodate more materials, and the production is improved.

Description

technical field [0001] The invention relates to an extrusion equipment part, in particular to a foaming screw of a large-scale conical double extruder. Background technique [0002] In recent years, people's requirements for plastic products have been continuously improved, especially in terms of energy conservation and environmental protection, plastic production equipment and processes are required to meet the requirements of the use of products, while reducing production costs as much as possible, improving resource utilization, and achieving green manufacturing. However, due to its low thermal conductivity, good acoustic damping, easy processing by mechanical methods, high flame retardancy, good heat and chemical resistance, and low cost of low density, foamed plastics are not comparable to non-plastic materials. Compared with the foaming process, the consumption of raw materials is significantly reduced, and the environmental pressure is reduced. Among them, the appear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/505B29C48/525B29C48/40B29K27/06B29C48/67
CPCB29C48/022B29C48/402B29C48/52B29C48/53B29C48/535B29C48/67B29K2027/06
Inventor 余汉祥
Owner SHANGHAI JINHU EXTRUSION EQUIP
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