CN102198684B - Oriented chipboard and processing technology - Google Patents

Oriented chipboard and processing technology Download PDF

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Publication number
CN102198684B
CN102198684B CN201110084640.1A CN201110084640A CN102198684B CN 102198684 B CN102198684 B CN 102198684B CN 201110084640 A CN201110084640 A CN 201110084640A CN 102198684 B CN102198684 B CN 102198684B
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wood shavings
parts
length
wood
glue
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CN201110084640.1A
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CN102198684A (en
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钟笃章
国智武
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鲁丽集团有限公司
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Abstract

The invention discloses an oriented chipboard and a processing technology. The chipboard is composed of three layers including two surface layers and one intermediate core layer, which are adhered together by adhesives; the processing technology uses rotary cut veneer wastes remained in a plywood production process as raw materials to substitute small-diameter standard materials, so that a large volume of wood is saved, and production cost is saved; and simultaneously, the length of the oriented chipboard can be increased by using the method, consequently, inherent mechanical property indexes of the oriented chipboard can be improved, and the oriented chipboard has higher carrying capacity; the oriented chipboard and the processing technology provided by the invention have the advantages that the rotary cut veneer wastes can be used as the raw materials, so that the large volume of wood is saved, the production cost is saved, the static bending strength and the elastic modulus of the produced oriented chipboard are synchronously increased, and the carrying capacity of the oriented chipboard is greatly improved.

Description

A kind of oriented wood chipboard and preparation technology

Technical field

The present invention relates to a kind of particieboard, specifically a kind of oriented wood chipboard and preparation technology, belongs to the production and processing field of wood-base fibre and particle panel material.

Background technology

Oriented wood chipboard (OSB) belongs to new varieties of structural particleboard, is with long narrow flat large wood shavings, and after glue mixing, watch core layer vertical and orienting spreading mutually, forms through hot pressing.

In prior art, the required large wood shavings of oriented wood chipboard are with path dimension stock mostly, make through chipper planing, have so virtually wasted timber, and have increased workload., Pan Yiqing gentle according to Hua Yukun, Zhou Dingguo, golden aster introduces in " impact of Flake geometry on directional structure board performance " literary composition: " oriented shaving length has remarkable impact to MOR and elastic modelling quantity; increase wood shavings length; can improve the ratio of directional structure board parallel and vertical both direction MOR and bullet modulus, and can obviously increase the summation of both direction MOR ".But owing to being subject to the restriction of machining equipment chipper to timber process, wood shavings length is confined within the scope of 145mm.Therefore, its MOR and elastic modelling quantity desired value also have certain limitation.

Summary of the invention

In order to address the above problem, the present invention has designed a kind of oriented wood chipboard and preparation technology, and this particieboard, taking remaining rotary cut venner leftover bits and pieces in plywood production process as raw material, replaces path dimension stock, thereby saved a large amount of timber, the production cost of reduction; Meanwhile, can lengthen the length of oriented shaving by the method, thereby improve the mechanical performance index of oriented wood chipboard inherence, make it have stronger bearing capacity, and then there is purposes and use value widely.

Technical scheme of the present invention is:

A kind of oriented wood chipboard, described particieboard is that glued board is processed the three-decker that remaining rotary cut venner leftover pieces are bonded together by adhesive, comprises upper and lower two top layers and a middle sandwich layer; The top layer wood shavings length of described particieboard is 40~170mm, and top layer wood shavings width is 5~40mm, and sandwich layer wood shavings length is 3~39mm, and sandwich layer wood shavings width is 3~4mm.

A technique of preparing above-mentioned oriented wood chipboard, comprises the following steps:

(1) get the raw materials ready: select remaining dry/wet rotary cut venner leftover pieces of glued board processing, thickness is at 0.4~0.9mm; The moisture content of wet veneer is 30%~50%, and the moisture content of dry veneer is 15%~20%;

(2) guillotine cutting: respectively wet veneer and dry veneer are carried out to guillotine cutting, the wood shavings length≤170mm of guillotine cutting with cutting machine.

(3) fragmentation: crusher in crushing, control wood shavings width≤40mm, length≤170mm; Length is greater than 170mm, width is greater than after the wood shavings separation of 40mm, returns to disintegrating machine again broken;

(4) carry: by conveyer belt, the wood shavings after screening are delivered to wet feed storehouse;

(5) dry: the wet wood shavings in wet feed storehouse are dried by drying machine, and drying machine outlet temperature is 120~150 DEG C, the moisture content of dry rear wood shavings is 3~5%;

(6) selection by winnowing: the dried wood shavings and other foreign material that thickness are exceeded to 0.9mm separate;

(7) screening: dried wood shavings are separated according to size, reject the wood shavings that length and width are less than 3mm, using the wood shavings of length >=40mm, width >=5mm as top layer wood shavings, remaining wood shavings are as sandwich layer wood shavings;

(8) glue compounding and applying: the adhesive modulating is sprayed to the surface of the wood shavings after screening, after applying glue, sandwich layer wood shavings moisture content is 8~12%, and top layer wood shavings moisture content is 10~15%;

In described adhesive, contain modified cyanurotriamide resin glue or phenolic resin glue; In wood shavings spray modified cyanurotriamide resin glue, add paraffin wax emulsion, can improve protection against the tide and the water resistance of oriented wood chipboard, add curing agent, curing agent adopts composite curing agent, the consisting of of the composite curing agent aqueous solution: 16 parts, water, 3 parts of phosphoric acid, 2 parts of ammonium chlorides simultaneously; Phenolic resin glue itself has protection against the tide and water resistance.

While containing modified cyanurotriamide resin glue in adhesive, top layer sticks with glue consisting of of agent: 100 parts, modified cyanurotriamide resin glue, 6 parts of paraffin wax emulsions, 2~3 parts of the composite curing agent aqueous solution; Sandwich layer sticks with glue consisting of of agent: 100 parts, modified cyanurotriamide resin glue, 3 parts of paraffin wax emulsions, 3~5 parts of the composite curing agent aqueous solution;

While containing phenolic resin glue in adhesive, top layer sticks with glue consisting of of agent: 100 parts of phenolic resin glues, 15 parts, water; Sandwich layer sticks with glue consisting of of agent: 100 parts of phenolic resin glues, 10 parts, water;

Above-described part is weight portion;

Resin added is 65~90kg/m 3;

After applying glue, sandwich layer wood shavings moisture content is 8~12%, and top layer wood shavings moisture content is 10~15%.When moisture content is too low, can adjust by processing industry water;

(9) mat formation: the slab density after spreading machine becomes slab by wood shavings orienting spreading, mats formation is 570~630kg/m 3;

(10) hot pressing:

Hot pressing temperature: the slab hot pressing temperature that adopts the adhesive that contains modified cyanurotriamide resin glue to make is 185~200 DEG C, the slab hot pressing temperature that adopts the adhesive that contains phenolic resin glue to make is 175~185 DEG C; Hot pressing time: according to every millimeter of production board thickness 13~18 seconds; Unit pressure: 3.0~3.3MPa;

(11) saw limit: slab is cooling after hot pressing, then saws limit and make oriented wood chipboard.

The invention has the advantages that:

1, existing oriented structure chipboard raw materials is path dimension stock, and oriented structure chipboard raw materials of the present invention is rotary cut venner leftover bits and pieces, thereby has saved timber resources, has reduced production cost; Due to the increase of wood shavings length, reduce wood shavings end face gum consumption simultaneously, in having saved resource, reduced production cost; At current price calculate the present invention 300 yuan/m that can reduce production costs 3left and right.

2, lengthen the length of oriented shaving by method of the present invention, thereby the MOR of oriented wood chipboard and elastic modelling quantity are synchronously increased, its bearing capacity significantly improves.

Brief description of the drawings

Accompanying drawing is the result schematic diagram of the oriented wood chipboard of the embodiment of the present invention.

Detailed description of the invention

Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.

Embodiment 1

Raw material: remaining dry/wet rotary cut venner leftover pieces of glued board processing

Equipment: cutting machine, disintegrating machine, conveyer belt, drying machine, winnowing machine, hot press, spreading machine.

Reagent: modified cyanurotriamide resin glue (production of Zibo Ao Wei adhesive Co., Ltd), wax emulsion waterproofing agent (production of Shanghai Jiao Er chemical products Co., Ltd), industrial phosphoric acid (mass percentage concentration 85%, Shifang Hongyu Chemical Industry Co., Ltd. produces), industrial ammonium chloride (mass percentage concentration 99.5%, Shandong Kang Tewei industry Chemical Co., Ltd. produce), water (water for industrial use).

Step:

(1) get the raw materials ready

Raw material: remaining dry/wet rotary cut venner leftover pieces of glued board processing, thickness is at 0.4~0.9mm;

The moisture content of wet veneer is 30%~50%, and the moisture content of dry veneer is 15%~20%.

(2) guillotine cutting

Respectively wet veneer and dry veneer are carried out to guillotine cutting with cutting machine, the wood shavings length≤170mm of guillotine cutting avoids cross-feed simultaneously as far as possible.

(3) fragmentation

By crusher in crushing, make wood shavings width≤40mm, length≤170mm, length is greater than to the wood shavings that 170mm, width be greater than 40mm and separates, then it is again broken to return to disintegrating machine.

(4) carry

By conveyer belt, the wood shavings after screening are delivered to wet feed storehouse.

(5) dry

Wet wood shavings in wet feed storehouse are dried by drying machine, and drying machine outlet temperature is 120~150 DEG C, and the moisture content of dry rear wood shavings is 3~5%.

(6) selection by winnowing

The dried wood shavings and other foreign material (as sandstone, metal) that thickness are exceeded to 0.9mm separate.

(7) screening

Dried wood shavings are separated according to size, reject the wood shavings that length and width are less than 3mm, using the wood shavings of length >=40mm, width >=5mm as top layer wood shavings, all the other distinguish warehousing as sandwich layer wood shavings.

(8) glue compounding and applying

The adhesive modulating is sprayed to the surface of the wood shavings after screening; Slab resin added is 65~90kg/m 3; After applying glue, sandwich layer wood shavings moisture content is 8~12%, and top layer wood shavings moisture content is 10~15%; When moisture content is too low, can adjust by processing industry water;

Adhesive used contains modified cyanurotriamide resin glue, adds curing agent simultaneously, adds paraffin wax emulsion waterproofing agent in wood shavings glue spraying, can improve protection against the tide and the water resistance of oriented wood chipboard.

Curing agent adopts composite curing agent, the consisting of of the composite curing agent aqueous solution: 16 parts, water, 3 parts of phosphoric acid solutions, 2 parts of ammonium chlorides;

Top layer consists of with glue: 100 parts, modified cyanurotriamide resin glue, 6 parts of paraffin wax emulsions, 2~3 parts of the composite curing agent aqueous solution; Be 200~240 seconds hardening time; Sandwich layer consists of with glue: 100 parts, modified cyanurotriamide resin glue, 3 parts of paraffin wax emulsions, 3~5 parts of the composite curing agent aqueous solution; Be 180~220 seconds hardening time;

Above-mentioned part is mass parts.

(9) mat formation

Plate blank paving density is 570~630kg/m 3, in length and breadth to even density.

The material of lacking phenomenon can not have while mating formation slab, and in course of conveying, slab can not have the limit of collapsing phenomenon.

(10) hot pressing

Hot pressing temperature: 185~200 DEG C; Unit pressure: 3.0~3.3MPa;

Hot pressing time (press dwell time): according to every millimeter of production board thickness 13~18 seconds;

(11) saw limit

Plank behind saw limit is wanted straight Founder, intact limit unfilled corner and paste limit phenomenon;

Be of a size of long 2440mm, wide 1220mm, length and width tolerance are ± 3mm; The poor 5mm that is no more than of diagonal; Edge nonstraightness is no more than 1.5mm/m.

(12) inspection

According to the size specifying in LY/T1580-2000 " oriented wood chipboard " standard and tolerance and inspection rule with the method for inspection is tested and record.

Product specification: 2440 × 1220 × 15 (mm), as shown in drawings, 1 is upper epidermis, and 2 is sandwich layer, and 3 is lower top layer.

MOR, elastic modelling quantity and internal bond strength to the said goods detects in quality supervision and test research institute of Shandong Province, and result is:

MOR (parallel): 55MPa (national standard 20MPa), MOR (vertically): 21MPa (national standard 10MPa);

Elastic modelling quantity (parallel): 7730MPa (national standard 3500MPa), elastic modelling quantity (vertically): 2240MPa (national standard 1400MPa);

Internal bond strength: 0.67MPa (national standard 0.32MPa).

Embodiment 2

Raw material: remaining dry/wet rotary cut venner leftover pieces of glued board processing

Equipment: cutting machine, disintegrating machine, conveyer belt, drying machine, winnowing machine, hot press, spreading machine.

Reagent: phenolic resin glue (essence Witter, Qingdao Chemical Co., Ltd. produces), water.

Step:

(1) get the raw materials ready

Raw material: remaining dry/wet rotary cut venner leftover pieces of glued board processing, thickness is at 0.4~0.9mm;

The moisture content of wet veneer is 30%~50%, and the moisture content of dry veneer is 15%~20%.

(2) guillotine cutting

Respectively wet veneer and dry veneer are carried out to guillotine cutting with cutting machine, the wood shavings length≤170mm of guillotine cutting avoids cross-feed simultaneously as far as possible.

(3) fragmentation

By crusher in crushing, make wood shavings width≤40mm, length≤170mm, length is greater than to the wood shavings that 170mm, width be greater than 40mm and separates, then it is again broken to return to disintegrating machine.

(4) carry

By conveyer belt, the wood shavings after screening are delivered to wet feed storehouse.

(5) dry

Wet wood shavings in wet feed storehouse are dried by drying machine, and drying machine outlet temperature is 120~150 DEG C, and the moisture content of dry rear wood shavings is 3~5%.

(6) selection by winnowing

The dried wood shavings and other foreign material (as sandstone, metal) that thickness are exceeded to 0.9mm separate.

(7) screening

Dried wood shavings are separated according to size, reject the wood shavings that length and width are less than 3mm, using the wood shavings of length >=40mm, width >=5mm as top layer wood shavings, all the other distinguish warehousing as sandwich layer wood shavings.

(8) glue compounding and applying

Adhesive is sprayed to the surface of wood shavings; Slab resin added is 65~90kg/m 3;

Adhesive used contains phenolic resin glue, and top layer consists of with glue: 100 parts of phenolic resin glues, 15 parts, water; Sandwich layer consists of with glue: 100 parts of phenolic resin glues, 10 parts, water, and described part is weight portion;

After applying glue, sandwich layer wood shavings moisture content is 8~12%, and top layer wood shavings moisture content is 10~15%.When moisture content is too low, can adjust by processing industry water.

(9) mat formation

Plate blank paving density is 570~630kg/m 3, in length and breadth to even density.

The material of lacking phenomenon can not have while mating formation slab, and in course of conveying, slab can not have the limit of collapsing phenomenon.

(10) hot pressing

Hot pressing temperature: 175~185 DEG C; Unit pressure: 3.0~3.3MPa;

Hot pressing time (press dwell time): according to every millimeter of production board thickness 13~18 seconds.

(11) saw limit

Plank behind saw limit is wanted straight Founder, intact limit unfilled corner and paste limit phenomenon;

Be of a size of long 2440mm, wide 1220mm, length and width tolerance are ± 3mm; The poor 5mm that is no more than of diagonal; Edge nonstraightness is no more than 1.5mm/m.

(12) inspection

According to the size specifying in LY/T1580-2000 " oriented wood chipboard " standard and tolerance and inspection rule with the method for inspection is tested and record.

Product specification: 2440 × 1220 × 15 (mm), as shown in drawings, 1 is upper epidermis, and 2 is sandwich layer, and 3 is lower top layer.

MOR, elastic modelling quantity and internal bond strength to the said goods detects at national wood-based plate and Bamboo and wood product Quality Supervision and Inspection Center, and result is:

MOR (parallel): 38.8MPa (national standard 20MPa), MOR (vertically): 23.4MPa (national standard 10MPa);

Elastic modelling quantity (parallel): 5770MPa (national standard 3500MPa), elastic modelling quantity (vertically): 2400MPa (national standard 1400MPa);

Internal bond strength: 0.38MPa (national standard 0.32MPa).

In the various embodiments described above, raw materials is in the production of this area and commonly uses, and all can from market, obtain, and can not exert an influence for production result; The equipment of using in each operation, all adopts currently used conventional equipment, there is no special feature, the difference of Ye Buhuiyin producer and model and result is exerted an influence.

Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (1)

1. a preparation technology for oriented wood chipboard, is characterized in that: described particieboard is that glued board is processed the three-decker that remaining rotary cut venner leftover pieces are bonded together by adhesive, comprises upper and lower two top layers and a middle sandwich layer; The top layer wood shavings length of described particieboard is 40~170mm, and top layer wood shavings width is 5~40mm, and sandwich layer wood shavings length is 3~39mm, and sandwich layer wood shavings width is >=3mm and < 5mm;
The preparation technology of described oriented wood chipboard, comprises the following steps:
(1) get the raw materials ready
Raw material: remaining dry/wet rotary cut venner leftover pieces of glued board processing, thickness is at 0.4~0.9mm;
The moisture content of wet veneer is 30%~50%, and the moisture content of dry veneer is 15%~20%;
(2) guillotine cutting
Respectively wet veneer and dry veneer are carried out to guillotine cutting with cutting machine, the wood shavings length≤170mm of guillotine cutting avoids cross-feed simultaneously as far as possible;
(3) fragmentation
By crusher in crushing, make wood shavings width≤40mm, length≤170 mm, length is greater than to the wood shavings that 170 mm, width are greater than 40 mm and separates, then it is again broken to return to disintegrating machine;
(4) carry
By conveyer belt, the wood shavings after screening are delivered to wet feed storehouse;
(5) dry
Wet wood shavings in wet feed storehouse are dried by drying machine, and drying machine outlet temperature is 120~150 DEG C, and the moisture content of dry rear wood shavings is 3~5%;
(6) selection by winnowing
The dried wood shavings and other foreign material that thickness are exceeded to 0.9mm separate;
(7) screening
Dried wood shavings are separated according to size, reject the wood shavings that length and width are less than 3 mm, using the wood shavings of length >=40mm, width >=5mm as top layer wood shavings, all the other distinguish warehousing as sandwich layer wood shavings;
(8) glue compounding and applying
The adhesive modulating is sprayed to the surface of the wood shavings after screening; Slab resin added is 65~90kg/m 3; After applying glue, sandwich layer wood shavings moisture content is 8~12%, and top layer wood shavings moisture content is 10~15%; When moisture content is too low, can adjust by processing industry water;
Adhesive used contains modified cyanurotriamide resin glue, adds curing agent simultaneously, adds paraffin wax emulsion waterproofing agent in wood shavings glue spraying, can improve protection against the tide and the water resistance of oriented wood chipboard;
Curing agent adopts composite curing agent, the consisting of of the composite curing agent aqueous solution: 16 parts, water, 3 parts of phosphoric acid solutions, 2 parts of ammonium chlorides;
Top layer consists of with glue: 100 parts, modified cyanurotriamide resin glue, 6 parts of paraffin wax emulsions, 2~3 parts of the composite curing agent aqueous solution; Be 200~240 seconds hardening time; Sandwich layer consists of with glue: 100 parts, modified cyanurotriamide resin glue, 3 parts of paraffin wax emulsions, 3~5 parts of the composite curing agent aqueous solution; Be 180~220 seconds hardening time;
Above-mentioned part is mass parts;
(9) mat formation
Plate blank paving density is 570~630 kg/m 3, in length and breadth to even density;
The material of lacking phenomenon can not have while mating formation slab, and in course of conveying, slab can not have the limit of collapsing phenomenon;
(10) hot pressing
Hot pressing temperature: 185~200 DEG C; Unit pressure: 3.0~3.3MPa;
Hot pressing time: according to every millimeter of production board thickness 13~18 seconds;
(11) saw limit
Slab is cooling after hot pressing, then saws limit and make oriented wood chipboard.
CN201110084640.1A 2011-04-06 2011-04-06 Oriented chipboard and processing technology CN102198684B (en)

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