CN110986565A - Plate core drying process - Google Patents

Abstract

The invention discloses a plate core drying process, wherein in the first stage, the first temperature is 50 ℃ for 5 hours, and the second temperature is 78 ℃ for 6 hours; in the second stage, the first temperature is 70 ℃ for 6 hours, the second temperature is 73 ℃ for 6 hours, the spraying is carried out once, and the third temperature is 75 ℃ for 6 hours; the third stage is dried for 6 hours at the temperature of 75 ℃; the fourth stage is baked for 6 hours at 73 ℃; the temperature of the fifth stage is 75 ℃ and the baking is carried out for 6 hours; in the sixth stage, the drying time is variable at 76 ℃, and the moisture is controlled within 23%; the seventh stage is dried for 6 hours at 73 ℃; in the eighth stage, the temperature is 82 ℃ for 6 hours, and the spraying is carried out once; the ninth stage is dried for 6 hours at 76 ℃; in the tenth stage, the drying time is indefinite at 75 ℃, and the moisture is controlled within 15%; baking at 80 ℃ for 6 hours in the eleventh stage; the temperature of the twelfth stage is 78 ℃, the drying time is indefinite, and the moisture is controlled within 10 percent; the temperature of the thirteenth stage is 79 ℃, the drying time is indefinite, and the moisture is controlled within 7 percent; in the fourteenth stage, the temperature is reduced by blowing air at 40 ℃ for 6 hours; the moisture of the plate core is controlled within 7 percent, and the deformation and the cracking of the plate core are reduced.

Description

Plate core drying process

Technical Field

The invention relates to the field of building materials, in particular to a plate core drying process.

Background

The board core is generally made of pine, tung, fir, poplar, malachite, miscellaneous tree and other wood, the wood has high water content, and the wood contains trace formaldehyde. But the traditional board core is easy to deform and crack in the drying production process, has the defects of high water content, panel carbonization, boron edges, low qualified rate of finished products and the like, and cannot release the formaldehyde of the wood.

Disclosure of Invention

In view of the above, the invention provides a board core drying process, which controls the moisture content of the board core within 7%, reduces the deformation and cracking of the board core, and releases formaldehyde of wood as soon as possible.

In one aspect, the invention provides a plate core drying process, which comprises the following steps:

step 1: in the first stage, the first temperature is 50 ℃ for 5 hours, and the second temperature is 78 ℃ for 6 hours;

step 2: in the second stage, the first temperature is 70 ℃ for 6 hours, the second temperature is 73 ℃ for 6 hours, the spraying is carried out once, and the third temperature is 75 ℃ for 6 hours;

and step 3: the third stage is dried for 6 hours at the temperature of 75 ℃;

and 4, step 4: the fourth stage is baked for 6 hours at 73 ℃;

and 5: the temperature of the fifth stage is 75 ℃ and the baking is carried out for 6 hours;

step 6: in the sixth stage, the drying time is variable at 76 ℃, and the moisture is controlled within 23%;

and 7: the seventh stage is dried for 6 hours at 73 ℃;

and 8: in the eighth stage, the temperature is 82 ℃ for 6 hours, and the spraying is carried out once;

and step 9: the ninth stage is dried for 6 hours at 76 ℃;

step 10: in the tenth stage, the drying time is indefinite at 75 ℃, and the moisture is controlled within 15%;

step 11: baking at 80 ℃ for 6 hours in the eleventh stage;

step 12: the temperature of the twelfth stage is 78 ℃, the drying time is indefinite, and the moisture is controlled within 10 percent;

step 13: the temperature of the thirteenth stage is 79 ℃, the drying time is indefinite, and the moisture is controlled within 7 percent;

step 14: in the fourteenth stage, the temperature is reduced by blowing air for 6 hours at 40 ℃.

Compared with the prior art, the plate core drying process has the beneficial effects that: the moisture of the board core is controlled within 7 percent, the deformation and cracking of the board core are reduced, and the formaldehyde of the wood is released as soon as possible.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention provides a plate core drying process, which comprises the following steps:

step 1: in the first stage, the first temperature is 50 ℃ for 5 hours, and the second temperature is 78 ℃ for 6 hours;

step 2: in the second stage, the first temperature is 70 ℃ for 6 hours, the second temperature is 73 ℃ for 6 hours, the spraying is carried out once, and the third temperature is 75 ℃ for 6 hours;

and step 3: the third stage is dried for 6 hours at the temperature of 75 ℃;

and 4, step 4: the fourth stage is baked for 6 hours at 73 ℃;

and 5: the temperature of the fifth stage is 75 ℃ and the baking is carried out for 6 hours;

step 6: in the sixth stage, the drying time is variable at 76 ℃, and the moisture is controlled within 23%;

and 7: the seventh stage is dried for 6 hours at 73 ℃;

and 8: in the eighth stage, the temperature is 82 ℃ for 6 hours, and the spraying is carried out once;

and step 9: the ninth stage is dried for 6 hours at 76 ℃;

step 10: in the tenth stage, the drying time is indefinite at 75 ℃, and the moisture is controlled within 15%;

step 11: baking at 80 ℃ for 6 hours in the eleventh stage;

step 12: the temperature of the twelfth stage is 78 ℃, the drying time is indefinite, and the moisture is controlled within 10 percent;

step 13: the temperature of the thirteenth stage is 79 ℃, the drying time is indefinite, and the moisture is controlled within 7 percent;

step 14: in the fourteenth stage, the temperature is reduced by blowing air for 6 hours at 40 ℃.

The invention adopts fourteen stages to carry out drying operation, controls the drying temperature and drying time of each stage, reduces the moisture of the board core, controls the moisture of the board core within 7 percent, reduces the deformation and cracking of the board core, and releases formaldehyde of the wood as soon as possible.

The techniques not described above are common general knowledge of the skilled person. The above description is only exemplary of the present invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. The board core drying process is characterized by comprising the following steps:

step 1: in the first stage, the first temperature is 50 ℃ for 5 hours, and the second temperature is 78 ℃ for 6 hours;

step 2: in the second stage, the first temperature is 70 ℃ for 6 hours, the second temperature is 73 ℃ for 6 hours, the spraying is carried out once, and the third temperature is 75 ℃ for 6 hours;

and step 3: the third stage is dried for 6 hours at the temperature of 75 ℃;

and 4, step 4: the fourth stage is baked for 6 hours at 73 ℃;

and 5: the temperature of the fifth stage is 75 ℃ and the baking is carried out for 6 hours;

step 6: in the sixth stage, the drying time is variable at 76 ℃, and the moisture is controlled within 23%;

and 7: the seventh stage is dried for 6 hours at 73 ℃;

and 8: in the eighth stage, the temperature is 82 ℃ for 6 hours, and the spraying is carried out once;

and step 9: the ninth stage is dried for 6 hours at 76 ℃;

step 10: in the tenth stage, the drying time is indefinite at 75 ℃, and the moisture is controlled within 15%;

step 11: baking at 80 ℃ for 6 hours in the eleventh stage;

step 12: the temperature of the twelfth stage is 78 ℃, the drying time is indefinite, and the moisture is controlled within 10 percent;

step 13: the temperature of the thirteenth stage is 79 ℃, the drying time is indefinite, and the moisture is controlled within 7 percent;

step 14: in the fourteenth stage, the temperature is reduced by blowing air for 6 hours at 40 ℃.