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Soft elastic bag extrusion method of forming paper pulp and the mold thereof

A technology of soft elasticity and forming molds, applied in textiles and papermaking, etc., can solve the problems of difficult slurry adsorption, high drying energy consumption, low cold blank strength, etc., and achieve shortened drying time, low moisture content, and cold blank moisture content. low effect

Inactive Publication Date: 2004-09-08
刘洪涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many disadvantages in this method, mainly in large energy consumption, high investment, low output, and no competitiveness in the market.
Theoretically speaking, the dehydration pressure produced by vacuum adsorption (high or low vacuum degree) has a certain range, that is, between 0-0.1Mp. Therefore, the pulp blank produced by the existing adsorption technology has a high moisture content and a long adsorption time. It is easy to produce uneven thickness and leakage, and can only absorb the slurry with good dehydration, and it is difficult to adsorb the slurry with other additives
Moreover, the strength of the cold billet is low, it is difficult to demould, and the drying consumes a lot of energy and takes a long time. Since the pulp is dehydrated at less than 0.1Mp, the thickness of the adsorbed billet is also limited to a certain extent. Therefore, the vacuum adsorption method can only produce products with low strength requirements. High-strength products cannot be manufactured for products with certain strength requirements, such as bobbins, flowerpots, paper barrels, etc.

Method used

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  • Soft elastic bag extrusion method of forming paper pulp and the mold thereof
  • Soft elastic bag extrusion method of forming paper pulp and the mold thereof
  • Soft elastic bag extrusion method of forming paper pulp and the mold thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Application of the present invention to produce tapered paper bobbins for textile use

[0025] Such as figure 1 As shown, a soft elastic bag press pulp forming mold includes an outer shell 1, a soft elastic bag 2, and a paper tube dehydration core 3; the outer shell 1 and the dehydration core 3 are movable and sealed up and down. The inner side of the body 1 and the outer side of the dehydration core 3 are sealed and connected together with the outer casing 1 up and down.

[0026] The soft elastic capsule pressing pulp forming method is as follows:

[0027] 1) The soft elastic capsule 2 and the outer casing 1 are sealed together up and down, and the outer cavity 4 is formed between the soft elastic capsule 2 and the inner wall of the outer casing 1;

[0028] 2) Water is injected into the outer cavity 4 to remove air;

[0029] 3) The water in the outer cavity 4 is pumped out, the soft elastic capsule 2 expands outward, the soft elastic capsule 2 sticks to the inner wa...

Embodiment 2

[0036] The invention is applied to produce civil fast food bowls.

[0037] Such as figure 2 As shown, a soft elastic capsule pulp forming mold includes an outer casing 1, a soft elastic capsule 2, and a fast food box dehydration core 3; 1, the inner side of the dehydration core 3, and the upper and lower sides are sealed together with the outer casing 1.

[0038] The soft elastic capsule pressing pulp forming method is as follows:

[0039] 1) The soft elastic capsule 2 and the outer casing 1 are sealed together up and down, and the outer cavity 4 is formed between the soft elastic capsule 2 and the inner wall of the outer casing 1;

[0040] 2) Water is injected into the outer cavity 4 to remove air;

[0041] 3) The water in the outer cavity 4 is pumped out, the soft elastic capsule 2 expands outward, the soft elastic capsule 2 sticks to the inner wall of the outer casing 1, and the volume of the outer cavity 4 decreases;

[0042] 4) Put the dehydration core 3 made accordi...

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Abstract

The present invention relates to the method and mold of pressing paper pulp directly into blank in certain shape. The mold includes outer casing, soft elastic bag, and dewatering mold core. The outer casing and the dewatering mold core are connected tightly and can move vertically and relatively, and the soft elastic bag in between has upper and lower parts connected to the outer casing. The formation process includes fixing the soft elastic bag, pouring water to eliminate air, pumping water to expand outwards the soft elastic bag, setting the dewatering mold core, injecting paper pulp into inner cavity, injecting pressurized water into outer cavity, taking out the dewatering mold core and discharging blank. The present invention has the advantages of high dewatering speed, homogeneous blank with low water content, high yield, high quality, low cost and low power consumption.

Description

technical field [0001] The invention is applied to the pulp mold industry, and relates to a special-shaped papermaking technology—a manufacturing method of directly pressing pulp into a blank with a certain shape and a special mold. Background technique [0002] With the advancement of society, the demand for environmentally friendly paper products in industrial production and people's lives is increasing, such as disposable fast food boxes, instant noodle bowls, food trays in supermarkets, inner packaging of industrial products, etc., the most common in traditional production The best way is to use vacuum adsorption. There are many disadvantages in this method, mainly in large energy consumption, high investment, low output, and no competitiveness in the market. Theoretically speaking, the dehydration pressure produced by vacuum adsorption (high or low vacuum degree) has a certain range, that is, between 0-0.1Mp. Therefore, the pulp blank produced by the existing adsorptio...

Claims

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Application Information

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IPC IPC(8): D21J3/00
Inventor 刘洪涛
Owner 刘洪涛