Degradable sheet extrusion molding machine

Abstract

The invention discloses a degradable sheet extrusion molding machine. The degradable sheet extrusion molding machine comprises a twin-screw extruder, a single-screw extruder, an automatic constant temperature device, a blanking control device and a die head hoisting device, a discharge port of the twin-screw extruder communicates with a feeding port of the single-screw extruder, and the position of the twin-screw extruder is higher than the single-screw extruder. The blanking control device is arranged on a feeding port of the twin-screw extruder, an extrusion die head is arranged on a discharge port of the single-screw extruder, and the top of the extrusion die head is fixedly connected with the die head hoisting device. Machine cylinders of the twin-screw extruder and the single-screw extruder are divided into a plurality of independent temperature control sections, cooling channels which reduce the temperature of the machine cylinders are formed in the temperature control sections,cast aluminum heaters for heating materials sleeve the outer walls of the temperature control sections, and the temperature of the temperature control sections of the twin-screw extruder and the single-screw extruder is controlled by the automatic constant temperature device. The degradable sheet extrusion molding machine can effectively reduce the production cost, ensure the quality and stabilityof products, and greatly improve the working efficiency.

Description

technical field [0001] The invention relates to a sheet material forming equipment, in particular to a degradable sheet material extrusion forming machine. Background technique [0002] With the application of polymer materials in various fields, the pollution of waste polymer materials to the environment has a growing trend. Plastic is the most widely used polymer material, ranking first in the world in terms of volume. With a large number of polymer materials in the For applications in various fields, waste polymer materials are increasingly polluting the environment. Among them, plastic products used for various packaging purposes have the characteristics of short service life and are easy to be discarded, which brings great pollution to the environment. [0003] The development of environmentally acceptable degradable polymer materials is an important way to solve environmental pollution. Biodegradable polymers refer to the chemical action of nature or added microorganis...

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Problems solved by technology

[0004] At present, the main production process of degradable sheet is divided into two links. In the first link, the twin-screw extruder is used to mix and granulate each material, and then in the second link, various sheet extruders (such as Twin-screw sheet extruder, single-screw extruder, conical twin-screw extruder, etc.) to produce finished sheets, the biggest disadvantage of this kind of processing equipment for sheet production is that it needs to heat the degraded material twice, Melting and degrading materials are mostly heat-sensitive materials. The mechanical shearing accompanying the melting process is very easy to degrade the material, and even yellowing and carbonization in severe cases, and secondary melting will also increase energy consumption and increase production. The cost is not conducive to the development trend of energy saving and emission reduction. In addition, two teams need to be arranged for secondary melting, which not only increases labor intensity and corresponding labor costs, but also is not conducive to the arrangement of production plans.

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