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Method for improving gluing uniformity of heavy bamboo and improving bonding strength

A technology of gluing strength and uniformity, applied in the field of bamboo material manufacturing, can solve the problems of uneven gluing and decrease of gluing strength of heavy bamboo, and achieve the effect of increasing gluing strength, improving gluing strength and uniform gluing.

Inactive Publication Date: 2012-07-04
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After hot (cold) pressing of heavy bamboo, due to the lack of adhesive in the interior of the heavy bamboo, the gluing of heavy bamboo is uneven and the bonding strength is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Design of bamboo beam extrusion kneading machine: L 1 =1350mm, L 2 =2600mm, L 3 =1270mm, L 4 =2500mm;

[0020] 2. Bamboo bunch drying: Dry the processed bamboo bunches artificially or naturally to make the moisture content reach 10-12%;

[0021] 3. Glue sizing of bamboo bundles: tie the bamboo bundles into bamboo bundles, immerse them in a phenolic resin glue tank with a solid content of about 30%, and feed and dip the bamboo bundles at a ratio of 1:5 for glue and bamboo bundles. Immediately after immersion, take out the bundles of bamboo strands, dry the glue for 30 seconds, and send them to the bamboo strand extrusion kneading machine;

[0022] 4. Extrusion and kneading of bamboo bundles: After the bamboo bundles are fed into the trough of the lower platen for extrusion and kneading, the plunger of the plunger-type oil cylinder goes down, and the extrusion and kneading machine is closed. The lower platen of the kneading machine moves left and right on the lowe...

Embodiment 2

[0028] 1. Design of bamboo beam extrusion kneading machine: L 1 =1600mm, L 2 =2200mm, L 3 =1500mm, L 4 =2050mm;

[0029] 2. Bamboo bunch drying: Dry the processed bamboo bunches artificially or naturally to make the moisture content reach 10-12%;

[0030] 3. Bamboo bundle sizing: tie the bamboo bundles into bamboo bundles, immerse them in a phenolic resin glue tank with a solid content of about 30%, and feed the glue to the bamboo bundles at a ratio of 1:5 for dipping. Immediately after immersion, take out the bundles of bamboo strands, dry the glue for 30 seconds, and send them to the bamboo strand extrusion kneading machine;

[0031] 4. Extrusion and kneading of bamboo bundles: After the bamboo bundles are fed into the trough of the lower platen for extrusion and kneading, the plunger of the plunger-type oil cylinder goes down, and the extrusion and kneading machine is closed. The lower platen of the kneading machine moves left and right on the lower roller in a small r...

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Abstract

The invention discloses a method for improving gluing uniformity of heavy bamboo and improving bonding strength. The method comprises the following steps of: designing a bamboo bunch extrusion kneading machine; drying bamboo bunches: artificially or naturally drying the processed bamboo filament bunches; gluing the bamboo filament bunches: binding the bamboo filament bunches, completely soaking the bamboo filament bunches, then taking the bamboo filament bunches out immediately, airing the glue for 30 seconds, conveying the bamboo filament bunches to the bamboo bunch extrusion kneading machine, extruding so that thick bamboo filaments in the bamboo bunches crack, gluing the cracked part at the same time, and recycling the extruded phenolic aldehyde glue; performing secondary drying on the extruded and kneaded bamboo bunches; spreading: spreading the secondary dried bamboo bunches to form blanks of certain specification in the fiber direction and the width direction; and forming: conveying the spread bamboo bunches to a hot press for hot pressing and curing forming, or conveying the bamboo bunches to a die, locking the die in a cold press and then conveying the bamboo bunches to a forming chamber for heating and curing forming, and thus obtaining heavy bamboo square boards or boards. By the method, the aims of improving the gluing uniformity of the heavy bamboo and improving the bonding strength of the heavy bamboo are fulfilled.

Description

technical field [0001] The invention belongs to the technical field of bamboo production, in particular to a method for improving the gluing uniformity and bonding strength of heavy bamboo. Background technique [0002] my country is rich in bamboo resources and has great potential for bamboo processing. Heavy bamboo, also known as recombined bamboo, is a new bamboo material that reorganizes and strengthens bamboo materials, that is, bamboo materials are rolled into bamboo strands, dried, dipped, and then dried, then laid on the mold Among them, the bamboo profiles are cured by high temperature and high pressure. Compared with other bamboo profiles, heavy bamboo has the characteristics of high bamboo utilization rate, good product performance and high added value, and has developed rapidly in my country in recent years. Heavy bamboo manufacturing mainly includes bamboo bundle processing, drying, dipping, secondary drying, billet assembly and hot (cold) pressing and other p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/08B32B37/00B32B38/08B32B38/16
Inventor 李新功吴义强郑霞
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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