Fiber cutting device and fiber reinforced composite material mixing equipment

Abstract

The inventor provides a fiber cutting device which comprises a cutter roller, a pressing roller, a rubber roller, a pressing support, a pressing mechanism and a power mechanism, wherein the pressing mechanism drives the pressing support to move close to or away from the rubber roller, the power mechanism is in transmission connection with a driving roller to drive the driving roller to rotate, when the pressing support driven by the pressing mechanism is close to the rubber roller, the driving roller driven by the power mechanism drives a driven roller to rotate by friction force, and a short fiber outlet is formed below a device shell or a device outer frame, and is located below the gap between the cutter roller and the rubber roller. In the fiber reinforced composite material mixing equipment, the distance between the fiber cutting device and a feeding port of a second-stage extrusion device is shortened as far as possible, the short fiber cut by the cutter roller directly falls to the feeding port of the second-stage extrusion device as soon as possible, the cluster falling of the short fiber is avoided, and the raw material feeding uniformity of the second-stage extrusion device is improved.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a fiber material cutting device and fiber reinforced composite material mixing equipment. Background technique [0002] Fiber material is one of the common raw materials. For example, in composite materials, it is often necessary to add fiber materials to the composite material to achieve or enhance the performance of the composite material. [0003] Fibers as raw materials usually exist in the form of longer long fibers, such as fiber bundles, or are produced in the form of thin wires, etc., and are processed, transported, and stored. [0004] When used as a material raw material, it is usually necessary to cut long fibers into short fibers for use. For example: LFT (Long Fiber reinforced Thermoplastics), that is, long fiber reinforced thermoplastic materials, the so-called long fibers are compared with the fibers used in ordinary fiber reinforced thermoplastic materials. Us...

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Problems solved by technology

[0010] In the process of realizing the present invention, the inventors found that the following problems exist in the prior art: the fiber and the polymer matrix material are not easy to mix uniformly, resulting in unsatisfactory quality of the second-stage extrusion material

[0017] The inventor found that the fiber cutting device with the above-mentioned structure has a large volume and is equipped with multiple pressurizing devices, so it cannot effectively approach the feeding port of the second-stage extrusion device, and must pass through a long feeding channel, such as Figure 1a The feeding hopper shown is conveyed to the feed inlet of the second-stage extrusion device. During the conveying process, the short fibers after cutting tend to adhere to the feeding hopper and fall in groups, thus causing the second-stage extrusion device to enter the feed port. When feeding, the fiber feeding is not uniform

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