Extrusion type three-color mulching film mold

Abstract

The invention discloses an extrusion type three-color mulching film mold. The extrusion type three-color mulching film mold comprises a base, an inner layer spiral body, a middle layer spiral body, anouter layer spiral body and a body are sequentially and fixedly arranged on the base from inside to outside, gaps are reserved between every two adjacent spiral bodies, the outer layer spiral body and the body in the radial direction, and an annular gap is formed; spiral grooves are formed in the inner layer spiral body, the middle layer spiral body and the outer layer spiral body; a mouth mold is fixed above the inner layer spiral body, an adjusting ring is arranged above the body, a mold mouth gap is arranged between the adjusting ring and the mouth mold, the annular gap communicates with the mold mouth gap, a middle layer spacer bush is arranged above the outer layer spiral body, an inner layer spacer bush is arranged above the middle layer spiral body, and channels are formed in the middle layer spacer bush and the inner layer spacer bush. Through the middle layer spacer bush and the inner layer spacer bush, raw materials of the outer layer and materials of the middle layer and the inner layer are staggered and extruded in parallel, the materials of the inner layer are attached into the materials of the middle layer to be extruded out, the extruded three-color matched mulchingfilm is uniform in color, color crossing is not caused, the joint strength is high, and the mold can be suitable for being widely applied agriculturally.

Description

technical field [0001] The invention relates to the technical field of film production, in particular to an extrusion-type three-color plastic film mold. Background technique [0002] The current production of two-color matching mulch film has white heat preservation and moisturizing, black moisturizing and weeding, but has no reflective function. The silver and black masks have silver-gray upward reflections, which can avoid aphids and prevent viruses, but their ability to increase ground temperature is poor, and other monochromatic films have single functions. The three-color color matching mulch solves the shortcomings of the above mulch very well. The three-color color matching mulch is white and black (silver-gray) alternately. The silver-gray and black are divided into upper and lower layers and are firmly combined. The white film can cover part of the ground to moisturize and increase the ground temperature. The black (silver-gray) film makes the covered part prevent...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an extruded three-color mulch mold to solve the above-mentioned problems in the prior art, and to overcome the defects of uneven color of the extruded mulch, easy cross-color, and low joint strength.

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