CN115723220B - Device and method for eliminating stress of density board - Google Patents
Device and method for eliminating stress of density board Download PDFInfo
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- CN115723220B CN115723220B CN202211564608.8A CN202211564608A CN115723220B CN 115723220 B CN115723220 B CN 115723220B CN 202211564608 A CN202211564608 A CN 202211564608A CN 115723220 B CN115723220 B CN 115723220B
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- linear motion
- pressing
- motion device
- density
- density board
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 77
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000007731 hot pressing Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 229920001807 Urea-formaldehyde Polymers 0.000 abstract description 5
- 239000003292 glue Substances 0.000 abstract description 5
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 4
- 238000004513 sizing Methods 0.000 abstract description 4
- 238000007711 solidification Methods 0.000 abstract description 4
- 230000008023 solidification Effects 0.000 abstract description 4
- 239000011094 fiberboard Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Veneer Processing And Manufacture Of Plywood (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention belongs to the technical field of density board production, and particularly relates to a device and a method for eliminating stress of a density board, wherein the device for eliminating stress of the density board comprises a linear motion device and a pressing device; the linear motion device is vertically arranged, and the movable end is positioned below; the pressing device is arranged at the movable end of the linear motion device; the pressing device comprises a pressing plate, a plurality of pressing rods and a pressing head; compared with the prior art, the invention (1) uses the linear motion device and the pressing device to keep pressure on the stacked density boards, and the density boards finish the solidification of urea-formaldehyde glue and the evaporation of water in the boards in the pressure maintaining process, so that the stress deformation caused by the board production process problem (uneven drying of local places due to the difference of water content in the boards caused by uneven sizing) can be avoided; (2) The pressure maintaining process simulates that the density board is subjected to temperature and humidity changes throughout the year, and the deformation of the density board in the use process is greatly reduced in the process.
Description
Technical Field
The invention belongs to the technical field of density board production, and particularly relates to a device and a method for eliminating stress of a density board.
Background
In the process of manufacturing the density board, the problem of the production process causes uneven local drying, and in the process of applying urea-formaldehyde glue, the difference of the moisture content in the board caused by uneven sizing can cause larger difference between the solidification of the urea-formaldehyde glue and the evaporation of the moisture in the board compared with a normal value, so that the internal stress of the density board is unbalanced finally, thereby generating deformation.
In addition, the density board is easy to deform due to improper maintenance in the use process. The deformation causes in the use process of the density board furniture include that the density board is often directly irradiated by strong sunlight or roasted for a long time with a high-temperature artificial light source nearby; the density board is soaked by rain, and indoor moisture cannot be dispersed to cause the density board to be wetted and deformed; the surface of the density board is cleaned by alkaline or acidic cleaning agent to deform.
Disclosure of Invention
The invention provides a device and a method for eliminating stress of a density board aiming at the problem of stress deformation of the density board caused by improper production process and maintenance.
In order to achieve the above purpose, the invention adopts the following technical scheme: the device for eliminating stress of the density board comprises a linear motion device and a pressing device; the linear motion device is vertically arranged, and the movable end is positioned below; the pressing device is arranged at the movable end of the linear motion device; the pressing device comprises a pressing plate, a plurality of pressing rods and a pressing head; the pressure head can be dismantled and connect the expansion end at linear motion device, the horizontal projection of clamp plate coincides with the horizontal projection of the many density boards that the below was piled up, a plurality of the depression bar is balanced to be distributed between clamp plate and pressure head and be fixed or can dismantle with clamp plate, pressure head respectively and be connected.
Preferably, the plurality of linear motion devices are installed in a temperature-control humidity-control chamber, and the temperature-control humidity-control chamber is provided with a forklift for orderly stacking the density boards right below the pressing plate.
Preferably, the linear motion device is a linear motion device with a self-locking function.
Preferably, the linear motion device is a worm gear trapezoidal screw lifter.
Preferably, the lower end of the trapezoidal screw rod of the worm gear trapezoidal screw rod lifter is in threaded connection with the pressure head.
Preferably, a pull rod displacement sensor is vertically arranged on one side of the worm gear trapezoidal screw lifter, and the end part of the pull rod displacement sensor is detachably connected with the lower end of the trapezoidal screw.
A method for stress relief of a density fiberboard, the stress relief device for the density fiberboard being used for stress relief of the density fiberboard, comprising the steps of:
firstly, installing a plurality of groups of linear motion devices in a temperature control and humidity control chamber, selecting a pressing device which is suitable for the specification of a density board to be processed, and installing the pressing device at the movable end of the linear motion device;
step two, using a forklift to orderly stack the plurality of polished density boards after hot pressing and trimming to the position right below a pressing plate of a pressing device;
starting a linear motion device, wherein the linear motion device drives the pressing plate to descend until the pressing plate contacts with the uppermost density plate; suspending the linear motion device and recording the reading of the pull rod displacement sensor;
restarting the linear motion device, wherein the linear motion device drives the pressing plate to descend for a set distance;
step five, maintaining the pressure of the pressing plate on the stacked multiple density boards, and periodically changing the temperature and humidity of the temperature and humidity control chamber; after a certain time, the linear motion device is started to drive the pressing plate to move upwards, and the treated density board is transported away by the forklift.
Preferably, after the linear motion device drives the pressing plate to descend for a set distance in the fourth step, the linear motion device is closed, and the self-locking function of the linear motion device is utilized to keep the pressure on the stacked density plates.
Preferably, the temperature and humidity of the temperature and humidity control chamber are periodically changed to simulate the temperature and humidity change throughout the year.
Compared with the prior art, the invention has the advantages and positive effects that:
compared with the prior art, the invention (1) uses the linear motion device and the pressing device to keep pressure on the stacked density boards, and the density boards finish the solidification of urea-formaldehyde glue and the evaporation of water in the boards in the pressure maintaining process, so that the stress deformation caused by the board production process problem (uneven drying of local places due to the difference of water content in the boards caused by uneven sizing) can be avoided;
(2) The temperature and humidity of the temperature and humidity control chamber are periodically changed in the pressure maintaining process, the temperature and humidity change of the density board in four seasons is simulated, and the deformation of the density board in the use process in the pressure maintaining process is greatly reduced;
(3) The linear motion device is a linear motion device with a self-locking function, so that the density board stress relieving device is very energy-saving and convenient to popularize;
(4) The pressure head is detachably connected to the movable end of the linear motion device, and a proper pressure device can be selected to be mounted on the movable end of the linear motion device before the density board is processed;
(5) The horizontal projection of the pressing plate coincides with the horizontal projection of the plurality of density boards stacked below, so that the pressing device presses the plurality of stacked density boards uniformly.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described, and fig. 1 is a schematic diagram of an apparatus for eliminating stress of a density board;
FIG. 2 is a schematic diagram of a second embodiment of a device for stress relief of a density board.
Reference numerals illustrate: 1-a linear motion device;
2-a pressing device, 21-a pressing plate, 22-a pressing rod and 23-a pressing head.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.
Example 1
The invention will be further described with reference to fig. 1-2, wherein the device for eliminating stress of the density board shown in fig. 1 comprises a linear motion device 1 and a pressing device 2.
As shown in fig. 1, the linear motion device 1 is vertically installed with the movable end below; the pressing device 2 is mounted at the movable end of the linear motion device 1.
As shown in fig. 1 and 2, the pressing device 2 includes a pressing plate 21, a plurality of pressing rods 22, and a pressing head 23; the pressure head 23 is detachably connected to the movable end of the linear motion device 1, the horizontal projection of the pressure plate 21 coincides with the horizontal projection of a plurality of density boards stacked below, and a plurality of pressure rods 22 are uniformly distributed between the pressure plate 21 and the pressure head 23 and are respectively fixedly or detachably connected with the pressure plate 21 and the pressure head 23.
As shown in fig. 2, the plurality of linear motion devices 1 are installed in a temperature-controlled humidity-controlled chamber configured with a forklift for stacking the density boards neatly right under the pressing plate 21.
The linear motion device 1 is a linear motion device having a self-locking function. In this embodiment, the linear motion device 1 is a worm gear trapezoidal screw lifter. The lower end of the trapezoidal screw rod of the worm gear trapezoidal screw rod lifter is in threaded connection with the pressure head 23.
A pull rod displacement sensor is vertically arranged on one side of the worm gear trapezoidal screw lifter, and the end part of a pull rod of the pull rod displacement sensor is detachably connected with the lower end of the trapezoidal screw.
Example 2
The difference between this embodiment and embodiment 1 is that: in this embodiment, the linear motion device 1 adopts a linear motion device with a self-locking function of CN113700813 a.
A method for eliminating stress of a density board, which uses a device for eliminating stress of the density board to eliminate stress of the density board, comprises the following steps:
firstly, installing a plurality of groups of linear motion devices 1 in a temperature control and humidity control chamber, selecting a pressing device 2 which is suitable for the specification of a density board to be processed, and installing the pressing device 2 at the movable end of the linear motion device 1;
step two, the forklift is utilized to orderly stack the plurality of the polished density boards after hot pressing and trimming to the position right below the pressing plate 21 of the pressing device 2;
starting the linear motion device 1, wherein the linear motion device 1 drives the pressing plate 21 to descend until the pressing plate 21 contacts with the uppermost density board; suspending the linear motion device 1 and recording the reading of the pull rod displacement sensor;
step four, restarting the linear motion device 1, wherein the linear motion device 1 drives the pressing plate 21 to descend for a set distance;
step five, maintaining the pressure of the pressing plate 21 on the stacked plurality of density boards, and periodically changing the temperature and humidity of the temperature and humidity control chamber; after a certain time (for example, seven days), the linear motion device 1 is started to drive the pressing plate 21 to move upwards, and the treated density boards are transported by a forklift.
In the fourth step, after the linear motion device 1 drives the pressing plate 21 to descend for a set distance, the linear motion device 1 is closed, and the pressure on the stacked density plates is kept by utilizing the self-locking function of the linear motion device 1.
The temperature and humidity of the temperature and humidity control chamber are periodically changed to simulate the temperature and humidity change throughout the year.
The invention (1) uses the linear motion device 1 and the pressing device 2 to keep pressure on the stacked density boards, and the density boards finish the solidification of urea-formaldehyde glue and the evaporation of water in the boards in the pressure maintaining process, so that the stress deformation caused by the board production process problem (uneven drying in local places due to the difference of water content in the boards caused by uneven sizing) can be avoided; (2) The temperature and humidity of the temperature and humidity control chamber are periodically changed in the pressure maintaining process, the temperature and humidity change of the density board in four seasons is simulated, and the deformation of the density board in the use process in the pressure maintaining process is greatly reduced; (3) The linear motion device 1 is a linear motion device with a self-locking function, so that the density board stress relieving device is very energy-saving and convenient to popularize; (4) The pressing head 21 is detachably connected to the movable end of the linear motion device, and a proper pressing device 2 can be selected to be mounted on the movable end of the linear motion device 1 before the density board is processed; (5) The horizontal projection of the pressing plate 21 coincides with the horizontal projection of the plurality of density boards stacked below, so that the pressing force of the pressing device 2 on the plurality of density boards stacked is uniform.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above-mentioned embodiments according to the technical substance of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (4)
1. A method for eliminating stress of a density board, which is characterized in that a device for eliminating stress of the density board is used for eliminating stress of the density board, and the device for eliminating stress of the density board comprises a linear motion device (1) and a pressing device (2);
the linear motion device (1) is vertically arranged, and the movable end is positioned below; the pressing device (2) is arranged at the movable end of the linear motion device (1); the linear motion device (1) is a worm gear trapezoidal screw rod lifter; a pull rod displacement sensor is vertically arranged on one side of the worm gear trapezoidal screw rod lifter, and the end part of a pull rod of the pull rod displacement sensor is detachably connected with the lower end of the trapezoidal screw rod;
the pressing device (2) comprises a pressing plate (21), a plurality of pressing rods (22) and a pressing head (23); the pressing heads (23) are detachably connected to the movable end of the linear motion device (1), the horizontal projection of the pressing plates (21) coincides with the horizontal projection of a plurality of density boards stacked below, and a plurality of pressing rods (22) are uniformly distributed between the pressing plates (21) and the pressing heads (23) and are respectively fixedly or detachably connected with the pressing plates (21) and the pressing heads (23);
the method for eliminating stress of the density board comprises the following steps:
firstly, installing a plurality of groups of linear motion devices (1) in a temperature control and humidity control chamber, selecting a pressing device (2) which is suitable for the specification of a density board to be processed, and installing the pressing device (2) at the movable end of the linear motion device (1);
step two, the forklift is utilized to orderly stack the plurality of polished density boards after hot pressing and trimming to the position right below a pressing plate (21) of the pressing device (2);
starting the linear motion device (1), wherein the linear motion device (1) drives the pressing plate (21) to descend until the pressing plate (21) is contacted with the uppermost density plate; suspending the linear motion device (1) and recording the reading of the pull rod displacement sensor;
restarting the linear motion device (1), wherein the linear motion device (1) drives the pressing plate (21) to descend for a set distance;
the pressure of the pressing plate (21) on the stacked multiple density boards is maintained, and the temperature and the humidity of the temperature and humidity control chamber are periodically changed; after a certain time, the linear motion device (1) is started to drive the pressing plate (21) to move upwards, and the treated density boards are transported away by using a forklift.
2. The method for eliminating stress of the density board according to claim 1, wherein the lower end of the trapezoidal screw of the worm gear trapezoidal screw lifter is in threaded connection with the pressure head (23).
3. The method for eliminating stress of the density boards according to claim 1, wherein the pressure of the stacked density boards is maintained by the self-locking function of the linear motion device (1) by closing the linear motion device (1) after the linear motion device (1) drives the pressing plate (21) to descend by a set distance in the fourth step.
4. The method of claim 1, wherein the periodic variation of temperature and humidity in the temperature and humidity controlled chamber simulates the temperature and humidity variation throughout the year.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211564608.8A CN115723220B (en) | 2022-12-07 | 2022-12-07 | Device and method for eliminating stress of density board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211564608.8A CN115723220B (en) | 2022-12-07 | 2022-12-07 | Device and method for eliminating stress of density board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115723220A CN115723220A (en) | 2023-03-03 |
| CN115723220B true CN115723220B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211564608.8A Active CN115723220B (en) | 2022-12-07 | 2022-12-07 | Device and method for eliminating stress of density board |
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| Country | Link |
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| CN (1) | CN115723220B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1255422A (en) * | 1968-06-27 | 1971-12-01 | Motala Verkstad Ab | Improvements in multi-story presses |
| CN101491907A (en) * | 2009-02-18 | 2009-07-29 | 广东盈然木业有限公司 | Board balance health-preserving chamber and board health-preserving method |
| CN103692511A (en) * | 2013-12-12 | 2014-04-02 | 余成月 | Woodworking cold press |
| CN107043080A (en) * | 2017-06-06 | 2017-08-15 | 安徽合力股份有限公司 | A kind of heavy-load type hoistable platform of self-locking performance |
| CN214490932U (en) * | 2020-11-26 | 2021-10-26 | 浙江云峰莫干山地板有限公司 | Timber health preserving room |
| CN215970557U (en) * | 2021-07-29 | 2022-03-08 | 宁波甬强科技有限公司 | Laminating device for eliminating stress of laminated board |
| CN217802211U (en) * | 2022-08-01 | 2022-11-15 | 徐州爱荣木业有限公司 | Plywood compression fittings |
-
2022
- 2022-12-07 CN CN202211564608.8A patent/CN115723220B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1255422A (en) * | 1968-06-27 | 1971-12-01 | Motala Verkstad Ab | Improvements in multi-story presses |
| CN101491907A (en) * | 2009-02-18 | 2009-07-29 | 广东盈然木业有限公司 | Board balance health-preserving chamber and board health-preserving method |
| CN103692511A (en) * | 2013-12-12 | 2014-04-02 | 余成月 | Woodworking cold press |
| CN107043080A (en) * | 2017-06-06 | 2017-08-15 | 安徽合力股份有限公司 | A kind of heavy-load type hoistable platform of self-locking performance |
| CN214490932U (en) * | 2020-11-26 | 2021-10-26 | 浙江云峰莫干山地板有限公司 | Timber health preserving room |
| CN215970557U (en) * | 2021-07-29 | 2022-03-08 | 宁波甬强科技有限公司 | Laminating device for eliminating stress of laminated board |
| CN217802211U (en) * | 2022-08-01 | 2022-11-15 | 徐州爱荣木业有限公司 | Plywood compression fittings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115723220A (en) | 2023-03-03 |
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