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Method for producing light-weight hard fibre board

A technology of hard fiber board and production method, applied in the field of fiber board, can solve the problems of rough texture surface, heavy weight, use restrictions, etc., and achieve the effect of smooth on both sides and firm texture

Inactive Publication Date: 2006-01-25
白世魁 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the soft fiberboard produced by the wet process has a low density and light weight, but its use is greatly limited due to its soft texture and rough surface; and the medium and high density fiberboard produced by the dry process Fiberboard, because of its heavy weight, the use is also subject to certain restrictions

Method used

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  • Method for producing light-weight hard fibre board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step: chipping, the wood is cut into thin wood chips of 18×15×5 mm with a chipper, and the debris is screened out with a sieve;

[0030] The second step: cleaning, cleaning the veneer with water;

[0031] The third step: steaming, steaming the cleaned veneer with high-temperature steam at 120°C for 6 minutes;

[0032] The 3rd step: heat grinding, grind the veneer after cleaning into 15 mesh fiber bundles and account for 60% wood fiber with double grinder;

[0033] The fourth step: glue spraying, evenly spraying 100Kg urea-formaldehyde resin glue in the proportion of the designed fiberboard per cubic meter in the ground fiber;

[0034] Step 5: Pipeline drying, drying the fiber bundles after glue spraying with hot air to reduce the water content to 9%;

[0035] The sixth step: laying, laying the dried fiber bundles in the forming chamber to a thickness of 230 mm;

[0036] Step 7: Pre-press, reduce the thickness to 115mm after pre-pressing by the pre-pressing ...

Embodiment 2

[0040] The first step: chipping, the wood is cut into thin wood chips of 19×16×2 mm with a chipper, and the debris is screened out with a sieve;

[0041] The second step: cleaning, cleaning the veneer with water;

[0042] The third step: steaming, steaming the cleaned veneer with high-temperature steam at 125°C for 4 minutes;

[0043] The 3rd step: heat grinding, grind the veneer after cleaning into 16 mesh fiber bundles and account for 50% wood fiber with double grinder;

[0044] The fourth step: glue spraying, evenly spraying 115Kg of urea-formaldehyde resin glue in the proportion of the designed fiberboard per cubic meter in the ground fiber;

[0045] Step 5: Pipeline drying, dry the fiber bundles after glue spraying with hot air to reduce the water content to 10%;

[0046] The sixth step: laying, laying the dried fiber bundles in the forming chamber to a thickness of 230 mm;

[0047] The seventh step: pre-pressing, the thickness is reduced to 92mm after pre-pressing by ...

Embodiment 3

[0051] The first step: chipping, the wood is cut into thin wood chips of 20×16×3 mm with a chipper, and the debris is screened out with a sieve;

[0052] The second step: cleaning, cleaning the veneer with water;

[0053] The third step: steaming, steaming the cleaned veneer with high-temperature steam at 130°C for 3 minutes;

[0054] The third step: heat grinding, use double grinder to grind the cleaned wood chips into wood fibers with 17 mesh fibers accounting for 70%;

[0055] The fourth step: glue spraying, evenly spraying glue in the ratio of 120Kg731 type water-soluble resin in the ratio of designed per cubic meter of fiberboard in the ground fiber;

[0056] Step 5: Pipeline drying, drying the glued fibers with hot air to reduce the water content to 11%;

[0057] The sixth step: laying, laying the dried fibers in the forming room to a thickness of 230 mm;

[0058] The seventh step: pre-pressing, the thickness is reduced to 138mm after pre-pressing by the pre-pressing ...

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Abstract

A technology for producing the light and hard fiber-board by dry method includes such steps as scraping strips, washing, digestion, thermal grinding, spraying resin, drying, spreading, pre-pressing, hot pressing, sawing and polishing.

Description

technical field [0001] The invention belongs to the technical field of fiber boards, and in particular relates to a production method for producing light-weight hard fiber boards from wood fibers. Background technique [0002] Fiberboard is one of the main types of wood-based panels. Its production raw materials are extensive, and it is the main way to effectively and rationally utilize limited forest resources. Fiberboard production methods include wet and dry processes. Among them, the wet production process is mainly used for the production of hard high-density fiberboard (above 800Kg / m) and soft fiberboard (below 400Kg / m); the dry production process is mainly used for high-density fiberboard and medium-density fiberboard (750Kg / m about). At present, the soft fiberboard produced by the wet process has a low density and light weight, but its use is greatly limited due to its soft texture and rough surface; and the medium and high density fiberboar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27M1/08B27N3/04B27L11/08B27N1/02
Inventor 白世魁李聚春
Owner 白世魁
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