Stone paper blowing production equipment

Abstract

The invention discloses stone paper blowing production equipment, which comprises a machine head. The center of the machine head is provided with a central air exhaust straight pipe; a circular stretching bar is arranged on a neck ring mold and has a taper with a large upper part and a small lower part; the side surface of the circular stretching bar is coated with a cloth material; the diameter of the upper end of the circular stretching bar is larger than that of a ring extruding port; an internal cooling air ring is arranged on the circular stretching bar; a central air inlet straight pipe extends from the center of the machine head upwards and passes through the circular stretching bar; the upper end of the central air inlet straight pipe is communicated with an air inlet of the internal cooling air ring; an air outlet of the internal cooling air ring is positioned at the periphery of the air inlet; the central air exhaust straight pipe extends from the center of the machine head upwards and passes through the circular stretching bar and the internal cooling air ring; and the upper opening of the central air exhaust straight pipe is positioned above the internal cooling air ring. The stone paper blowing production equipment can make a stone paper membrane extruded from the neck ring mold raised for a certain distance and then blown and stretched, and can make the stone paper membrane fully cooled.

Description

technical field [0001] The invention belongs to the technical field of stone paper production equipment, and in particular relates to a stone paper production equipment by film blowing method. Background technique [0002] Stone paper is made by grinding limestone, calcite, marble, etc. into powder, and then mixing stone powder with polyethylene and glue through a special process. The whole production process does not use wood pulp, water, strong alkali, strong acid, or bleach. , does not discharge waste water, waste gas, and waste residue, which is in line with the world trend of low-carbon environmental protection. [0003] Compared with traditional plant fiber paper, stone paper has the characteristics of high strength, tear resistance, perforation resistance, wear resistance, folding resistance, moisture resistance, insect resistance, etc., and excellent water resistance, can be in direct contact with food, low price, Moreover, the ore components contained in it can be ...

AI Technical Summary

Problems solved by technology

However, according to the structure of the existing film blowing equipment for producing plastic films, the film bubble will be blown and stretched immediately after extrusion, and the temperature of blowing and stretching is too close to the melting temperature

[0006] 2. The raw material density of stone paper is 1.6 times that of ordinary HDPE, the weight per unit area is large, the specific heat capacity is also large, and the air volume required for the cooling process is large

Although the existing film blowing equipment for producing plastic films has a cooling air ring outside the film bubble (it is also called an external cooling air ring because it is located outside the film bubble), the cooling effect obviously cannot meet the requirements of stone paper, and the The cooling air ring is very close to the die, so the cooling effect occurs before the blowing and stretching, and cannot cool the bubble after it is blown and stretched

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