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Method for performing material conversion in extrusion equipment

A technology for extruding equipment and materials, which is applied in the field of material conversion and can solve problems such as long time consumption

Active Publication Date: 2021-11-02
WINDMOELLER & HOELSCHER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to very long times in order to change all feeding devices of one or even several extrusion machines from one charge or one charge recipe to a subsequent recipe

Method used

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  • Method for performing material conversion in extrusion equipment
  • Method for performing material conversion in extrusion equipment
  • Method for performing material conversion in extrusion equipment

Examples

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Embodiment Construction

[0032] Figure 1 to Figure 6 An extrusion device 10 is shown schematically, which is equipped with two feed devices 20 . Each feeding device 20 is equipped with a feeding container 26 , a standpipe 24 and a weighing funnel 22 . figure 1 The operating state is shown, in which each supply device 20 is filled with charge E up to the full operating fill level BF. In this state, the individual charges E are supplied to the extruder 30 via the metering screw 28 and are used from there for the production of plastic film. In this case, the method according to the invention is carried out in the associated control device 40 .

[0033] As a preparatory measure to prepare for material conversion, figure 2 Shows how to lower the level F of the charge E. Now, because the production continues without refilling the feeder 20, the level F is lowered until the level F is reached according to image 3 The conversion material level WF. In order not to be lower than the conversion material...

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Abstract

The invention relates to a method for carrying out material conversion in an extrusion plant (10) having at least two feed devices (20) for feeding a charge (E) to an extruder (30), with the following steps: - identifying the changeover requirements for changing the material in the extrusion device (10), - making the feeder (20) ready for material changeover, - linking at least two feeders (20) with the feeder (E ) supply to the extruder (30) is separated, - discharge the charge (E) from the separated feed (20), - fill the empty feed (20) with subsequent material (EF).

Description

technical field [0001] The invention relates to a method for performing a material changeover in an extrusion plant having at least two feed devices. Background technique [0002] It is known that extrusion equipment is used for the production of plastic films or other film products. For this purpose, formulations consisting of different charges are melt-mixed in the extrusion device and supplied in liquid form to the corresponding injection head or extrusion head. In order to be able to switch between different plastic types, ie different products, a material changeover is required. This means that the charge has to be at least partially removed from different feed devices of the extrusion plant in order to be replaced by a subsequent charge with a different composition or different material properties. This material conversion is usually performed manually. [0003] A disadvantage of this known solution is the time involved with the manual material changeover. It is th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C48/10B29C48/25B29C48/27B29C48/285B29C48/92B29B7/60B29C48/08B29C48/49
CPCB29C48/92B29C48/271B29C48/2692B29C48/286B29B7/603B29C2948/92333B29C2948/9298B29C48/10B29C48/08B29C48/49B29B7/38B29B7/60B29C48/288
Inventor 安斯加尔·阿韦迈耶托拜厄斯·库利格梅亚尔马库斯·布斯曼延斯·明纳鲁普马丁·贝克曼
Owner WINDMOELLER & HOELSCHER GMBH
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