CN1555969A - Method of manufacturing thick medium high density fiber boards using single face spraying vacuum hot pressing technology - Google Patents
Method of manufacturing thick medium high density fiber boards using single face spraying vacuum hot pressing technology Download PDFInfo
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- CN1555969A CN1555969A CNA2003101128108A CN200310112810A CN1555969A CN 1555969 A CN1555969 A CN 1555969A CN A2003101128108 A CNA2003101128108 A CN A2003101128108A CN 200310112810 A CN200310112810 A CN 200310112810A CN 1555969 A CN1555969 A CN 1555969A
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- slab
- high density
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Abstract
A technology for preparing the medium-or high-density thick fibreboard includes hot-pressing the raw fibreboard while spraying steam onto its one surface for 1-10 min, and vacuum sucking for removing condensed water for 5-40S. Its advantage is short hot-pressing time and high productivity.
Description
Technical field
The invention belongs to wood-based plate manufacturing process field, specifically relate to the method that a kind of single face spray steaming-vacuum hot-pressing process is made the medium and high density fibre panel slab.
Background technology
The hot pressing of medium and high density fibre panel at present, all be to slab contact conduction mode of heating by heating platen, because fiber is the non-conductor of heat, contain air in certain amount in the slab in addition, influence the heat transfer rate of slab greatly, thereby make the pressing cycle of medium and high density fibre panel longer, if the compacting slab is then more difficult.When needing the compacting slab, can only adopt the prolongation hot pressing time, its result also can reduce the outward appearance and the inherent quality of goods.
Summary of the invention
The objective of the invention is to avoid above-mentioned weak point of the prior art, thereby provide a kind of slab center that makes to reach temperature required fast, thereby shorten hot pressing time significantly, improve production capacity, make the medium and high density fibre panel quality of item not only unaffected simultaneously, and also have certain single face spray steaming-vacuum hot-pressing process that improves to make the method for medium and high density fibre panel slab some performance indications.
Purpose of the present invention can reach by following measure:
A kind of single face spray steaming-vacuum hot-pressing process is made the method for medium and high density fibre panel slab, and this method comprises that slab is delivered to hot press by loader, and is earlier compressed to 0.20-0.70g/cm
3Density is characterized in that slab when accepting the heating platen transmission of heat by contact, has from the one-sided water vapour of slab and sprays as thermal medium, and steam injection time is at 2-20s, and vapour pressure is between 0.2-1.0Mpa; 1-10min after spray is steamed carries out vacuum draw to slab again, and suction time is 5-40s, removes the vaporization and condensation aqueous vapor.
Advantage of the present invention:
1. adopt the present invention can suppress the density of medium and high density fibre panel at 450-900kg/m
3Scope, thickness are at 12-100mm.
2. the hot pressing time of slab foreshortens to 2-15s/mm by original 20-50s/mm, and products thickness is big more, and effect is remarkable more.
3. use resulting product of the present invention, internal bond strength improves 25--50%, and goods profile density distribution bias is littler than traditional handicraft.
4. the pre-hardening thickness on hair plates surface is at 0.2-1.0mm.
5. adopt the medium and high density fibre panel product of manufacturing of the present invention to compare the medium and high density fibre panel product that traditional handicraft is made, free formaldehyde decrease to some degree.
The specific embodiment
The invention will be further described by the following examples.
Embodiment 1: suppress thick 30mm, density 0.75g/cm
3Medium density fibre board (MDF), adopt spray steamings-vacuum hot-pressing process, its technical data is: slab is first compressed to 0.35g/cm
3, then slab being sprayed steaming, steam injection time is about 5s, and water vapor pressure is 0.4Mpa, and behind 1.0min, to the slab vacuum draw, suction time is 6s.
Embodiment 2: suppress thick 30mm, density 0.88g/cm
3Medium density fibre board (MDF), adopt spray steamings-vacuum hot-pressing process, its technical data is: slab is first compressed to 0.40g/cm
3, then slab being sprayed steaming, steam injection time is about 10s, and water vapor pressure is 0.6Mpa, and to the slab vacuum draw, suction time is 8s behind 2.0min.
Embodiment 3: suppress thick 50mm, density 0.75g/cm
3Medium density fibre board (MDF), adopt spray steamings-vacuum hot-pressing process, its technical data is: slab is first compressed to 0.35g/cm
3, then slab being sprayed steaming, steam injection time is about 12s, and water vapor pressure is 0.6Mpa, and behind 2.0min, to the slab vacuum draw, suction time is 12s.
Embodiment 4: suppress thick 80mm, density 0.70g/cm
3Medium density fibre board (MDF), adopt spray steamings-vacuum hot-pressing process, its technical data is: slab is first compressed to 0.45g/cm
3, then slab being sprayed steaming, steam injection time is about 15s, and water vapor pressure is 0.7Mpa, and behind 3.0min, to the slab vacuum draw, suction time is 18s.
Embodiment 5: suppress thick 100mm, density 0.60g/cm
3Medium density fibre board (MDF), adopt spray steamings-vacuum hot-pressing process, its technical data is: slab is first compressed to 0.45g/cm
3, then slab being sprayed steaming, steam injection time is about 20s, and water vapor pressure is 0.7Mpa, and behind 5.0min, to the slab vacuum draw, suction time is 25s.
Claims (2)
1, a kind of single face spray steaming-vacuum hot-pressing process is made the method for medium and high density fibre panel slab, and this method comprises that slab is delivered to hot press by loader, and is earlier compressed to 0.20-0.70g/cm
3Density is characterized in that slab when accepting the heating platen transmission of heat by contact, has from the one-sided water vapour of slab and sprays as thermal medium, and steam injection time is at 2-20s, and vapour pressure is between 0.2-1.0Mpa.
2, single face spray steaming-vacuum hot-pressing process according to claim 1 is made the method for medium and high density fibre panel slab, it is characterized in that the spray steaming after 1-10min carries out vacuum draw to slab again, and suction time is 5-40s, removes the vaporization and condensation aqueous vapor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101128108A CN1555969A (en) | 2003-12-30 | 2003-12-30 | Method of manufacturing thick medium high density fiber boards using single face spraying vacuum hot pressing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101128108A CN1555969A (en) | 2003-12-30 | 2003-12-30 | Method of manufacturing thick medium high density fiber boards using single face spraying vacuum hot pressing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1555969A true CN1555969A (en) | 2004-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101128108A Pending CN1555969A (en) | 2003-12-30 | 2003-12-30 | Method of manufacturing thick medium high density fiber boards using single face spraying vacuum hot pressing technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN1555969A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899883A (en) * | 2010-07-07 | 2010-12-01 | 南京林业大学 | Manufacturing method of thick and light straw wall material |
| CN102555003A (en) * | 2012-01-11 | 2012-07-11 | 宁波大世界家具研发有限公司 | Integral wooden door made of wood fiber composite materials |
| CN109591122A (en) * | 2017-12-29 | 2019-04-09 | 南京林业大学 | A kind of method of wood materials vacuum compression densification |
-
2003
- 2003-12-30 CN CNA2003101128108A patent/CN1555969A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899883A (en) * | 2010-07-07 | 2010-12-01 | 南京林业大学 | Manufacturing method of thick and light straw wall material |
| CN102555003A (en) * | 2012-01-11 | 2012-07-11 | 宁波大世界家具研发有限公司 | Integral wooden door made of wood fiber composite materials |
| CN109591122A (en) * | 2017-12-29 | 2019-04-09 | 南京林业大学 | A kind of method of wood materials vacuum compression densification |
| CN109591122B (en) * | 2017-12-29 | 2021-09-03 | 南京林业大学 | Method for vacuum compression and densification of wood material |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |