Screw for double-screw extruder with multiple feed inlets
A twin-screw extruder, multi-feed technology, applied in the field of extruder equipment, can solve the problem that only in the feeding section or before the feeding section, there may be a feeding port in the mixing section, even in the extrusion section. There are also problems such as the feeding port, the failure to achieve the expected effect of multi-point feeding, and the inapplicability of multi-point feeding, etc., to achieve the effects of good plasticity, increased mixing pressure, and a wide range of applications
Inactive Publication Date: 2011-11-23
宜兴市旺达塑业有限公司
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Problems solved by technology
However, most of the existing extruder screws are divided into a transmission journal section, a feeding section, a mixing section and an extrusion section, but on a multi-point feeding screw extruder, since the feeding point is not only in the feeding section or Before the section, there may be a feed port in the mixing section, and even a feed port in the extrusion section, so the existing screw is not suitable for multi-feed extruders, and not only cannot reach Expected effect of multi-point feeding, but also worse performance of extruded product
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[0010] like figure 1 As shown, the screw for the entire multi-feeding port twin-screw extruder is only composed of a drive journal section 1 connected to the transmission mechanism and a kneading section 2 connected after the drive journal section 1 . The kneading section 2 is composed of a plurality of kneading blocks 3 that are radially and fixedly connected to each other, and each kneading block 3 has the same thickness, different cross-sections and different arrangement directions. A kneading tank 4 having the same width is provided between every two adjacent kneading blocks 3 .
[0011] When the screw is applied to a multi-feeding port twin-screw extruder, each feeding port can be set more freely according to the mixing of materials in the barrel, so that the performance of the final product is more stable.
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The invention discloses a screw for a double-screw extruder with multiple feed inlets. The screw is composed of a transmitted journal section connected with a transmission mechanism, and a mixing section. Multiple kneading blocks which have the same thickness and are arranged in different directions are connected fixedly to form the mixing section. A mixing groove is arranged between two adjacent kneading blocks. The screw does not comprise a feeding section and an extrusion section, is composed of a transmitted journal section and a mixing section, and can realize the functions of reaction and mixing and direct extrusion of materials through adjusting configuration of kneading blocks arranged at the mixing section, thus a mixed pressure is increased; uniform mixing and entire stirring are realized; and products have good performance stability and plasticity. The screw can cooperate with a double screw extruder with multiple feed inlets well thus broadening an application scope of a double screw extruder with multiple feed inlets.
Description
technical field [0001] The invention belongs to the field of extruder equipment, and particularly relates to a screw for a multi-feeding port twin-screw extruder. Background technique [0002] As an important equipment for the manufacture and molding of polymer materials, screw extruders are widely used in various fields, so there are many types of extruders suitable for different aspects and products. Since the screw extruder has a feed port, the distribution of the material between the screws will be uneven, so that the product uniformity at the discharge port is not good, and the high performance requirements cannot be met. In order to overcome this problem, ZL200820042276.6 discloses a screw extruder with 4 to 6 feeding ports evenly distributed on the barrel, in order to improve the uniformity of material mixing and maintain the stability of product performance. However, most of the existing extruder screws are divided into a conveying journal section, a feeding section...
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IPC IPC(8): B29C47/60B29C48/57B29C48/40
CPCB29C48/57B29C48/40
Inventor 吴建新
Owner 宜兴市旺达塑业有限公司