A kind of biomass multi-tower extrusion molding machine and its molding method

Abstract

The invention relates to extrusion forming equipment, in particular to a biomass multi-tower extrusion forming machine. The biomass multi-tower extrusion forming machine comprises a die cavity, a main pressure oil cylinder, a discharge channel, a feeding system and a stock bin and is characterized in that at least two packing towers are arranged on the upper portion of the die cavity side by side, a packing pressing block is arranged in each packing tower, a packing tower oil cylinder is arranged on the top of each packing tower, and a piston of each packing tower oil cylinder is fixedly connected with the corresponding packing pressing block. The invention further provides a biomass multi-tower extrusion forming method. The biomass multi-tower extrusion forming method comprises the steps that (1) the die cavity is filled with materials; (2) first-grade extrusion is finished for the materials in the vertical direction, and at least two semi-finished extrusion blocks are formed; (3) second-grade extrusion is carried out on the semi-finished extrusion blocks in the horizontal direction, so that the semi-finished extrusion blocks are connected into a whole; (4) the finished extrusion blocks are pushed out. The biomass multi-tower extrusion forming machine and method have the advantages that the equipment capacity is improved, the equipment cost is reduced under the same capacity, packing is uniform, pressure is balanced, system working is stable, and therefore the equipment service life is prolonged under the same efficiency.

Description

technical field [0001] The invention relates to extrusion molding equipment, in particular to a biomass multi-tower extrusion molding machine and a molding method thereof. Background technique [0002] Biomass molding is the main way to efficiently utilize waste such as wood processing residues, crop straw, and paper waste. For extrusion molding equipment, energy saving, high efficiency and stable and reliable work are expected. At present, the commonly used extruder structure at home and abroad includes a die cavity, a packing compact located above the die cavity, and a push cylinder. Cooperate with sending out product extrusion blocks. In order to increase the production capacity of the extruder, there are generally two ways: [0003] One is to increase the cross section of the extruded block, and increase the height and width of the extruded block to increase the weight of the extruded block. Using this method to increase the production capacity of the equipment bring...

AI Technical Summary

Problems solved by technology

Using this method to increase the production capacity of the equipment brings about the problem that when the cross section of the extrusion block increases, in order to meet the necessary molding pressure, the extrusion molding cylinder must be enlarged. Under the same output frequency, the hydraulic station The displacement must be increased, and the power of the whole machine must be increased a lot

But to increase the length of the product, the width of the packed tower must be increased. When the packed tower is widened, it will bring two problems: 1. After the packed tower is widened, the corresponding feeding system must also be enlarged.

However, when the feed system is increased to a certain extent, it will bring about the instability of the feed, so there is a certain limit to the increase in the length of the extrusion block

2. After the packing tower is widened, the molding cavity must also be widened, which brings difficulties to the manufacture of the cavity

In addition, when the packed tower is lengthened, because the packing cannot be guaranteed to be uniform, it will cause a large difference in the force of the packing block in the length direction, and the long-term work is not stable.

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