Wood-plastic composite reinforced blending plasticization device

Abstract

The invention discloses a wood-plastic composite reinforced blending plasticization device. The device comprises a blending plasticization screw I and a blending plasticization screw II with the same structure; both the blending plasticization screw I and the blending plasticization screw II are sequentially divided into a plastic granule conveying section, a plastic melting plasticization section, a fiber / plastic blending section, a reinforced blending plasticization section, a homogenization section and a metering section; and the reinforced blending plasticization section consists of 1 to 6 single-helix mixing rotors. The device has compact structure, small volume and good mixing effect, is convenient to operate, solves the problem of difficult blanking of fibers, realizes uniform dispersion of fibers and polymer resin in a submicroscopic scale range, is favorable for improving the two-phase structure and the perform uniformity of the composite materials, and improves the integral physical and mechanical properties of the materials; and the residence time of the fibers in the device is short, the temperature is appropriate, the fibers are not easy to carbonize, and the device is environmentally-friendly.

Description

technical field [0001] The invention relates to a wood-plastic composite material reinforced blending and plasticizing device. Background technique [0002] Wood-plastic composite foaming material is a new generation of green and environmentally friendly materials that has developed very rapidly in the world recently. Its raw materials are mainly natural plant fibers, thermoplastics (including various recycled plastics, plastic raw materials) or starch, and related modifications. agents and processing aids. It is a lightweight, highly cushioned and resilient material. Compared with pure plastic, this material has higher natural degradation rate, lower material cost, and enhanced performance. It has become a widely concerned new material for replacing wood and plastic, and has been widely used in the world. [0003] Compared with other pure plastic materials and other plastic composite materials, wood-plastic composite materials have very different properties. First of all...

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Problems solved by technology

[0004] CN100563999C discloses a special conical twin-screw extruder for wood-plastic composite materials. The conical twin-screw used in it has a mixing section, and the length-to-diameter ratio of the barrel and the screw is greater than 30, and only A vent hole, the device makes the molten plastic wrap the heated wood flour and mix evenly before the vent port, but the device only loads a vertically downward screw at the position of the feeding bin, and does not improve the difficulty of fiber At the same time, the extruder cannot guarantee the uniform dispersion of fibers in the melt. The wood fiber stays in the equipment for too long, the temperature is too high, and it is easy to carbonize. The product has no foaming and is not environmentally friendly. The equipment can High consumption, complex operation

[0005] CN2650971Y discloses a wood-plastic extruder, which adopts two horizontal and vertical screws, and the horizontal screw plays a plasticizing role. However, the problem of stable blending ratio between wood fiber feeding and plastic-wood composite system has not been fundamentally solved, the fiber feeding is difficult, the fiber stays in the equipment for too long, it is easy to carbonize, and the fiber dispersion effect is poor. Equipment without foaming unit

[0006] CN1064059C discloses a fiber-reinforced thermoplastic structure, manufacturing method and production equipment thereof. Fibers mainly adopt glass fibers, carbon fibers and mixtures thereof. one or more platens installed at least in the form of a network and partially wedge-shaped in cross-section between the front end of the screw and the die to control the degree of combing of the reinforcing fibers in the thermoplastic resin masterbatch, the fiber length and the helical flow of the mixed melt, This method of controlling the fiber size and the uniformity of fiber and thermoplastic resin mixing has too high technical requirements, especially the processing of the surface structure of the barrel and screw, and the equipment processing cost is too high. foam unit

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