CN101745964A - Technology for manufacturing glulam - Google Patents

Abstract

The invention discloses a technology for manufacturing glulam, comprising the following steps: scrimming; sieving fine material and coarse material; drying fine material and coarse material respectively and glue blending; orientated lay-up, respectively laying up two fine wood stick layers on front face and back face of a coarse wood stick layer to manufacture a slab; and hot-pressing the slab to form a sheet. According to the technology, leftover material of waste wood is rolled and scrimmed to the fine wood stick layers and the coarse wood stick layer, which are then dried, glue-blended and orientated-laid, respectively, the two fine wood stick layers are laid up on the front and back faces of the coarse wood stick layer, which can not only ensure flatness on the surface of the sheet, but can also make full use of the leftover material of waste wood, thus the utilization rate of woods is enhanced; in addition, the technology with simple production process can manufacture integrated sheet having high strength and nail-holding ability, without paying attention to the processing precision of wood sticks.

Description

A kind of preparation technology of integrated timber

Technical field

The invention belongs to the sheet material manufacture field, particularly a kind of preparation technology of integrated timber.

Background technology

Integrated timber is a laminated wood, and existing integrated timber is to be spliced by batten, and batten is to be formed through sawing by materials such as log, short and small rim charges, mainly has following technical problem in the mill:

(1), manufacture process need be through operation such as repeatedly digging, cut, and production process is comparatively complicated, and efficient is low;

(2), volume recovery is low, and the discarded leftover pieces that the slicing process produces can not utilize again, and the wasting of resources is comparatively serious;

(3), because integrated timber is to be spliced by batten, so the slicing precision of batten is had strict demand, not accurate enough as the slicing precision, the dimensional tolerance that then adds man-hour is difficult to guarantee, influences the total quality of sheet material.

Summary of the invention

The present invention is directed to above-mentioned the deficiencies in the prior art, provide a kind of technology reasonable, production efficiency height, the integrated timber preparation technology that timber utilization rate is high.

Technical scheme of the present invention is achieved in that

A kind of preparation technology of integrated timber includes following steps:

(1) comb is separated, earlier the waste wood leftover pieces are sent into roll squeezer and carried out suitably footpath pressure, make its cross shake, initial gross separation becomes relatively large and inter-adhesive but unseparated network structure, the network structure body of initial gross separation is sent into breaker beater to carry out rift grain comb again and separates, make the broach direction of motion basic consistent with the lumber fibre direction, utilizing broach that the network structure body is carried out the rift grain comb separates, force adhesion partly to separate, make the wooden Shu Jiben in separation back be the Hainan Ervatamia Root pencil, separate processing back wood bundle bar by comb and be of a size of length 80-100mm, thickness is below 5mm;

(2) screening, the wood bundle bar that comb is separated is sent into separator and is screened, and filters out thin wood bundle, thick wooden Shu Zuowei fines and coarse fodder;

(3) drying is at high temperature carried out rapid draing by drying machine respectively with fines and coarse fodder, and dried moisture content is controlled at 6-8%;

(4) applying glue, fines and coarse fodder that drying is good spray glue in the continous way glue mixer, and resin added is controlled at 6.5-8%;

(5) orienting spreading adopts spreading machine to thin wood bundle, thick wooden Shu Jinhang orienting spreading, and wood bundle bar is arranged by same direction basically, and middle shop is with coarse fodder, and slab is made with fines in the two-berth;

(6) hot pressing is put into hot press with above-mentioned slab and is carried out hot pressing, is pressed into sheet material, and hot pressing temperature is controlled at 160-180 ℃, and hot pressing pressure is 2.5Mpa, and hot pressing time is controlled at 6-8min.

The advantage that has adopted the present invention of technique scheme to have is: the present invention separates into thin wood bundle and thick wood bundle with the waste wood leftover pieces through the roll-in comb, then respectively to thin wood bundle and thick wooden Shu Jinhang drying, applying glue, orienting spreading, two thin wood bundle layers are mated formation at the tow sides of a thick wood bundle layer, both can guarantee the flatness of plate surface, can utilize discarded leftover pieces fully again, improve the timber utilization rate; And production process is simple, needn't consider the problem of batten wood bundle machining accuracy, can make the integrated sheet material of the high nail-holding ability of high strength equally.

Description of drawings

Fig. 1 is the flow chart of integrated timber preparation technology in the embodiment of the invention.

The specific embodiment

The specific embodiment of the present invention is as follows:

Embodiment: a kind of preparation technology of integrated timber includes following steps:

(1) comb is separated, earlier the waste wood leftover pieces are sent into roll squeezer and carried out suitably footpath pressure, make its cross shake, initial gross separation becomes relatively large and inter-adhesive but unseparated network structure, the network structure body of initial gross separation is sent into breaker beater to carry out rift grain comb again and separates, make the broach direction of motion basic consistent with the lumber fibre direction, breaker beater is provided with some spacing comb scales, utilizing the frequent effect of broach that the network structure body is carried out the rift grain comb separates, force adhesion partly to separate, make the wooden Shu Jiben in separation back be the Hainan Ervatamia Root pencil, separate the wooden bar of restrainting in processing back by comb and be of a size of length 90mm, thickness is below 5mm;

(2) screening, the wood bundle bar that comb is separated is sent into oscillating separator and is screened, and selects thin wood bundle, thick wooden Shu Zuowei fines and coarse fodder by the continuous vibratory sieve of vibratory sieve;

(3) drying is at high temperature carried out rapid draing by drying machine respectively with fines and coarse fodder, and dried moisture content is controlled at 6-8%;

(4) applying glue, fines and coarse fodder that drying is good spray glue in the continous way glue mixer, and resin added is controlled at 6.5-8%;

(5) orienting spreading, adopt spreading machine to thin wood bundle, thick wooden Shu Jinhang orienting spreading, making to each other, cemented surface increases, reduced the space that wooden interfascicular overlaps and forms, promptly separately thick wood bundle is mated formation into one deck, thin wood bundle is mated formation into one deck, and wood bundle bar is arranged by same direction basically, then two-layer thin wood bundle layer is mated formation respectively at the tow sides of thick wood bundle layer, make slab;

(6) slab is put into preformer and carried out precompressed, edging is transversal then;

(7) hot pressing is put into hot press with the slab of above-mentioned processing and is carried out hot pressing, is pressed into sheet material, and hot pressing temperature is controlled at 160-180 ℃, and hot pressing pressure is 2.5Mpa, and hot pressing time is controlled at 6-8min;

(8) sheet material after the hot pressing is cooled off after, saw the limit again and form finished product.

Sheet material through the processing of above-mentioned processing step has the high advantage of mechanical strength, also has the warpage of being difficult for, not yielding, characteristics such as flatness is good, and above-mentioned process data all is to have passed through the technical indicator that experiment showed, last formation finished product to be:

1, density 〉=0.55-0.65g/cm ³

2, moisture content: 6-12%

3, vertical MOR: 〉=18Mpa

4, nail-holding ability: 〉=1000N.

Claims (1)

1. the preparation technology of an integrated timber is characterized in that including following steps:

(1) comb is separated, earlier the waste wood leftover pieces are sent into roll squeezer and carried out suitably footpath pressure, make its cross shake, initial gross separation becomes relatively large and inter-adhesive but unseparated network structure, the network structure body of initial gross separation is sent into breaker beater to carry out rift grain comb again and separates, make the broach direction of motion basic consistent with the lumber fibre direction, utilizing broach that the network structure body is carried out the rift grain comb separates, force adhesion partly to separate, make the wooden Shu Jiben in separation back be the Hainan Ervatamia Root pencil, separate processing back wood bundle bar by comb and be of a size of length 80-100mm, thickness is below 5mm;

(2) screening, the wood bundle bar that comb is separated is sent into separator and is screened, and filters out thin wood bundle, thick wooden Shu Zuowei fines and coarse fodder;

(3) drying is at high temperature carried out rapid draing by drying machine respectively with fines and coarse fodder, and dried moisture content is controlled at 6-8%;

(4) applying glue, fines and coarse fodder that drying is good spray glue in the continous way glue mixer, and resin added is controlled at 6.5-8%;

(5) orienting spreading adopts spreading machine to thin wood bundle, thick wooden Shu Jinhang orienting spreading, and wood bundle bar is arranged by same direction basically, and middle shop is with coarse fodder, and slab is made with fines in the two-berth;

(6) hot pressing is put into hot press with above-mentioned slab and is carried out hot pressing, is pressed into sheet material, and hot pressing temperature is controlled at 160-180 ℃, and hot pressing pressure is 2.5Mpa, and hot pressing time is controlled at 6-8min.

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