CN111360950A - Method and device for measuring and recording temperature and pressure in plywood in production process - Google Patents
Method and device for measuring and recording temperature and pressure in plywood in production process Download PDFInfo
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- CN111360950A CN111360950A CN202010157455.XA CN202010157455A CN111360950A CN 111360950 A CN111360950 A CN 111360950A CN 202010157455 A CN202010157455 A CN 202010157455A CN 111360950 A CN111360950 A CN 111360950A
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- pressure
- temperature
- plywood
- vapor pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
Abstract
The invention discloses a method and a device for measuring and recording the temperature and pressure in a board in the production process of a plywood, comprising the following steps: in the process of pressing the plywood, setting temperature and pressure acquisition points between adjacent veneers, acquiring interlayer temperature and intra-veneer vapor pressure parameters between at least one group of adjacent veneers, and recording pressing time; simultaneously collecting the pressure of hydraulic oil of the plywood hot press; respectively establishing the change curves of the interlayer temperature, the vapor pressure in the plate and the external pressure along with the time; after the interlayer temperature and the external pressure are stable, selecting a time point when the vapor pressure in the plate is lower than the external pressure, wherein the time interval between the time point and the pressing starting point is the optimal pressing time; the pressing time for actual production may be determined with reference to the above-mentioned standard for the optimum pressing time. The method can accurately determine the optimal pressing process parameters of the plywood according to different raw materials and environmental factors, and greatly improve the working efficiency and the product quality.
Description
Technical Field
The invention relates to the technical field of plywood processing, in particular to a method and a device for measuring and recording the temperature and pressure in a plywood in the production process.
Background
Plywood is a three-layer or multi-layer plate material made up by using wood segments and making them be rotary-cut into single board or sliced into thin wood and using adhesive to make them be glued together, and usually using odd number of layers of single board and making the fibre directions of adjacent layers of single board be mutually perpendicular. The plywood is one of common furniture materials, is one of three large plates of an artificial plate, and can also be used as a material for airplanes, ships, trains, automobiles, buildings, packing boxes and the like. A group of veneers are typically assembled and glued perpendicular to each other in the direction of the adjacent layers of wood grain, and the skins and inner sheets are typically symmetrically disposed on either side of the center layer or core. The glued veneer is pressed into the wood grain board blank by the criss-cross matching of the glued veneer according to the wood grain direction under the condition of heating or not heating.
In the actual pressing process, due to the change of raw materials and the change of climate, the processes such as pressing temperature, temperature and time need to be adjusted in real time, the current common practice is to determine process parameters according to experience, and when the change factor is not completely determined, the pressing effect is mostly controlled by prolonging the pressing time in order to ensure the pressing effect, although the pressing effect is ensured to a certain extent, the production efficiency is greatly reduced due to the prolonging of time, so that a special experimental device is needed at present to accurately determine the optimal process parameters according to the change of external factors.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a device for measuring and recording the temperature and the pressure in the plywood in the production process, which can determine the optimal pressing process parameters of the plywood according to different raw materials and environmental factors, and improve the working efficiency and the product quality.
In order to achieve the purpose, the invention adopts the following specific scheme:
the invention provides a method for measuring and recording the temperature and pressure in a board in the production process of a plywood, which comprises the following steps:
(1) in the process of pressing the plywood, setting temperature and pressure collection points between adjacent veneers, collecting interlayer temperature and intra-veneer vapor pressure parameters between at least one layer of adjacent veneers, and recording pressing time; simultaneously collecting the pressure of hydraulic oil of the plywood hot press;
(2) establishing a time-dependent change curve chart of the interlayer temperature, the vapor pressure in the plate and the external pressure;
(3) after the interlayer temperature and the external pressure are stable, selecting a time point when the vapor pressure in the plate is stable and continuously lower than the external pressure, wherein the time interval between the time point and the pressing starting point is the optimal pressing time;
(4) the pressing time for actual production may be determined with reference to the above-mentioned standard for the optimum pressing time.
Further preferably, in the step (1), the interlayer temperature between adjacent single plates of each layer and the intra-plate vapor pressure parameter between adjacent single plates of the middle layer are collected. Namely, the temperature between layers is collected, and the vapor pressure in the plate is only collected in the middle (opposite) layer.
Further preferably, in the step (4), the actual production pressing time is determined according to a standard of not less than the optimum pressing time.
The second aspect of the present invention is to provide a device for measuring and recording the temperature and pressure in a board during the production of plywood, which comprises an interlayer temperature measuring unit, an in-board vapor pressure measuring unit, and a data processor, wherein:
the interlayer temperature measuring unit is used for measuring temperature parameters between adjacent single plates and comprises at least one group of temperature sensing probes arranged between the adjacent single plates, and the temperature sensing probes are connected with a temperature acquisition module of the data processor through leads;
the in-board vapor pressure measuring unit is used for measuring vapor pressure parameters between adjacent single boards and comprises in-board vapor pressure collecting heads arranged between the adjacent single boards, and the inner end openings and the outer ends of the in-board vapor pressure collecting heads are connected with a pressure collecting module of the data processor through pipelines;
the data processor comprises a temperature acquisition module, a pressure acquisition module and a data processing and displaying module, wherein the temperature acquisition module is used for acquiring interlayer temperature signals between adjacent single plates, the pressure acquisition module is used for acquiring in-plate vapor pressure signals between the adjacent single plates, and the data processing and displaying module is used for processing the interlayer temperature signals and the in-plate vapor pressure signals, drawing and displaying change curves of the interlayer temperature, the in-plate vapor pressure and the external pressure along with time.
Further preferably, the in-plate vapor pressure collection head is in an elongated needle shape; the material can be selected from hard materials such as metal.
Further preferably, the data processor is a paperless recorder; furthermore, the paperless recorder can be connected with a computer.
Compared with the prior art, the measuring and recording device has the advantages of simple structure, convenient operation and high reliability, and can accurately determine the optimal pressing process parameters of the plywood according to different raw materials and environmental factors by matching with the specific process method, thereby greatly improving the working efficiency and the product quality.
Drawings
FIG. 1 is a schematic view showing a construction of a recording apparatus for measuring temperature and pressure in a plywood sheet produced in the present invention;
FIG. 2 is a schematic view of the distribution of interlayer temperature measuring units and in-board vapor pressure measuring units among the layers of a plywood;
FIG. 3 is a graph of temperature-pressure-time variation for the production of 15mm plywood;
in the figure: 1. The device comprises a single board, 2 parts of a lead, 3 parts of a temperature sensing probe, 4 parts of an in-board vapor pressure collecting head, 5 parts of an air pipeline, 6 parts of a data processor, 7 parts of an in-board vapor pressure measuring unit, 8 parts of an interlayer temperature measuring unit.
Detailed Description
The invention will now be further described with reference to the drawings and specific examples.
Referring to fig. 1 and 2, an in-board temperature and pressure measuring apparatus in a plywood production process includes an interlayer temperature measuring unit 8, an in-board vapor pressure measuring unit 7, and a data processor 6, wherein:
the interlayer temperature measuring unit 8 is used for measuring temperature parameters between the adjacent single plates 1, and includes at least one temperature sensing probe 3 (four in this embodiment) arranged between the adjacent single plates 7, and the temperature sensing probe 3 is connected with the temperature acquisition module of the data processor 6 through the wire 2;
the in-board vapor pressure measuring unit 7 is used for measuring vapor pressure parameters between the adjacent single boards 1, the in-board vapor pressure measuring unit 7 comprises in-board vapor pressure collecting heads 4 arranged between the adjacent single boards, the in-board vapor pressure collecting heads 4 are designed to be slender needle-shaped and are made of metal materials, and the inner ends of the in-board vapor pressure collecting heads are opened, and the outer ends of the in-board vapor pressure collecting heads are connected with a pressure collecting module of the data processor 6 through an air pipeline 5;
the data processor 6 comprises a temperature acquisition module, a pressure acquisition module and a data processing and displaying module, wherein the temperature acquisition module is used for acquiring interlayer temperature signals between adjacent single plates, the pressure acquisition module is used for acquiring in-plate vapor pressure signals between the adjacent single plates, and the data processing and displaying module is used for processing the interlayer temperature signals and the in-plate vapor pressure signals, drawing and displaying change curves of the interlayer temperature, the in-plate vapor pressure and the external pressure along with time. The data processor is a paperless recorder which can be further connected with a computer, and the data processors such as the paperless recorder, the computer, the temperature acquisition module, the pressure acquisition module and the data processing and displaying module are all in the prior art and are not described in detail.
The following description will be made of a method for measuring the temperature and pressure in the plywood during the plywood production process, taking 15mm plywood (five-ply plywood) as an example, specifically as follows:
firstly, respectively arranging four temperature sensing probes 3 at the middle positions between adjacent single plates (coated with adhesive), namely between 1 st and 2 nd layers, between 2 nd and 3 rd layers, between 3 th and 4 th layers and between 4 th and 5 th layers; one in-plate vapor pressure collection head 4 is placed between layers 3-4 with its inner end opening in the middle between adjacent single plates.
Secondly, starting the equipment for pressing, recording the pressing starting time (10: 17 in figure 3) by the data processor 6, and recording the interlayer temperature (namely the vapor pressure parameters in the plate between the 1 st and 2 nd layers, between the 2 nd and 3 rd layers, between the 3 rd and 4 th layers and between the 4 th and 5 th layers) of each layer and the vapor pressure parameters in the plate between the middle layers (between the 3 rd and 4 th layers) in real time as the pressing is carried out; meanwhile, the pressure of hydraulic oil (namely the external pressure described below) of the plywood hot press is collected; and a time-dependent profile of the interlayer temperature, the vapor pressure in the panel, and the external pressure was established as shown in fig. 3.
Then, after the interlayer temperature and the external pressure are stabilized (about 10: 54 in fig. 3), selecting a time point (about 11: 07 in fig. 3) at which the vapor pressure in the plate is stabilized and continuously lower than the external pressure, and then the time interval between the time point and the starting point of pressing is the optimal pressing time, namely 50 minutes;
finally, according to the standard of not less than the optimal pressing time, determining the pressing time of actual production; that is, if the raw materials are selected and the 15mm plywood (five-ply board) is produced under the existing environment, the optimum pressing time is 50 minutes under the pressing temperature and pressure shown in the middle, and the amount can be adjusted in the actual production according to the actual situation.
The above embodiments are provided to help the public to understand the present invention, the protection scope of the present invention is not limited to the above embodiments, and any changes to the technical features or the whole structural forms and the method steps of the present invention, not the essential contents, are regarded as the technical solutions of the present invention.
Claims (7)
1. A method for measuring and recording the temperature and pressure in a board in the production process of a plywood is characterized by comprising the following steps:
in the process of pressing the plywood, setting temperature and pressure collection points between adjacent veneers, collecting interlayer temperature and intra-veneer vapor pressure parameters between at least one layer of adjacent veneers, and recording pressing time; simultaneously collecting the pressure of hydraulic oil of the plywood hot press;
establishing a time-dependent change curve chart of the interlayer temperature, the vapor pressure in the plate and the external pressure;
after the interlayer temperature and the external pressure are stable, selecting a time point when the vapor pressure in the plate is stable and continuously lower than the external pressure, wherein the time interval between the time point and the pressing starting point is the optimal pressing time;
the pressing time for actual production may be determined with reference to the above-mentioned standard for the optimum pressing time.
2. The method for measuring and recording the temperature and pressure in the plywood produced in the process of claim 1, wherein in the step (1), the interlayer temperature between adjacent veneers in each layer and the vapor pressure parameter in the plywood between adjacent veneers in the middle layer are collected.
3. The method for recording the measurement of the temperature and pressure in the plywood during the production process according to claim 1, wherein in the step (4), the actual production pressing time is determined according to a standard of not less than the optimum pressing time.
4. A temperature and pressure measuring and recording device in a plywood production process is characterized by comprising
An interlayer temperature measuring unit, an in-board vapor pressure measuring unit, and a data processor, wherein:
the interlayer temperature measuring unit is used for measuring temperature parameters between adjacent single plates and comprises at least one group of temperature sensing probes arranged between the adjacent single plates, and the temperature sensing probes are connected with a temperature acquisition module of the data processor through leads;
the in-board vapor pressure measuring unit is used for measuring vapor pressure parameters between adjacent single boards and comprises in-board vapor pressure collecting heads arranged between the adjacent single boards, and the inner end openings and the outer ends of the in-board vapor pressure collecting heads are connected with a pressure collecting module of the data processor through pipelines;
the data processor comprises a temperature acquisition module, a pressure acquisition module and a data processing and displaying module, wherein the temperature acquisition module is used for acquiring interlayer temperature signals between adjacent single plates, the pressure acquisition module is used for acquiring in-plate vapor pressure signals between the adjacent single plates, and the data processing and displaying module is used for processing the interlayer temperature signals and the in-plate vapor pressure signals, drawing and displaying change curves of the interlayer temperature, the in-plate vapor pressure and the external pressure along with time.
5. Plywood in-process temperature-pressure measurement recorder according to claim 4, characterized in that: the vapor pressure collecting head in the plate is in a slender needle tube shape.
6. The plywood-in-process panel temperature and pressure measurement recording device of claim 4, wherein said data processor is a paperless recorder.
7. Plywood in-process panel temperature-pressure measurement recording apparatus according to claim 6, said paperless recorder being further connectable to a computer.
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| CN202010157455.XA CN111360950B (en) | 2020-03-09 | 2020-03-09 | Method and device for measuring and recording temperature and pressure in plywood in production process |
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| CN202010157455.XA CN111360950B (en) | 2020-03-09 | 2020-03-09 | Method and device for measuring and recording temperature and pressure in plywood in production process |
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| CN111360950A true CN111360950A (en) | 2020-07-03 |
| CN111360950B CN111360950B (en) | 2021-10-01 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2792737Y (en) * | 2005-03-01 | 2006-07-05 | 南京林业大学 | Glued temperature sensing device of high-frequency heating wood |
| CN200962041Y (en) * | 2006-09-08 | 2007-10-17 | 中国林业科学研究院木材工业研究所 | Internal temperature pressure measurement device of artificial board and thermal pressure board flan |
| WO2009072662A1 (en) * | 2007-12-04 | 2009-06-11 | Olympus Corporation | Method of processing wooden piece |
| CN202964838U (en) * | 2012-11-30 | 2013-06-05 | 东莞诺华家具有限公司 | Artificial board hot-pressing parameter real-time monitoring device |
| CN204346486U (en) * | 2014-12-12 | 2015-05-20 | 上海德尔福汽车空调系统有限公司 | Multichannel pressure and temp monitoring and recording system |
| CN104833441A (en) * | 2015-05-29 | 2015-08-12 | 江苏农林职业技术学院 | Online monitoring device and method for temperature change rule of high-frequency and routine hot-pressing wood-based plate slabs |
-
2020
- 2020-03-09 CN CN202010157455.XA patent/CN111360950B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2792737Y (en) * | 2005-03-01 | 2006-07-05 | 南京林业大学 | Glued temperature sensing device of high-frequency heating wood |
| CN200962041Y (en) * | 2006-09-08 | 2007-10-17 | 中国林业科学研究院木材工业研究所 | Internal temperature pressure measurement device of artificial board and thermal pressure board flan |
| WO2009072662A1 (en) * | 2007-12-04 | 2009-06-11 | Olympus Corporation | Method of processing wooden piece |
| CN202964838U (en) * | 2012-11-30 | 2013-06-05 | 东莞诺华家具有限公司 | Artificial board hot-pressing parameter real-time monitoring device |
| CN204346486U (en) * | 2014-12-12 | 2015-05-20 | 上海德尔福汽车空调系统有限公司 | Multichannel pressure and temp monitoring and recording system |
| CN104833441A (en) * | 2015-05-29 | 2015-08-12 | 江苏农林职业技术学院 | Online monitoring device and method for temperature change rule of high-frequency and routine hot-pressing wood-based plate slabs |
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| CN111360950B (en) | 2021-10-01 |
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Effective date of registration: 20220301 Address after: 257000 No. 10, Kechuang Park, 1123 yunmenshan Road, Shengyuan street, Dongying District, Dongying City, Shandong Province Patentee after: Cornerstone aldehyde free Environmental Science Research Institute (Shandong) Co.,Ltd. Address before: 257091 No. c17-2, Rio Windsor Valley, Shengyuan street, Dongying District, Dongying City, Shandong Province Patentee before: Yang Dianji |
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Effective date of registration: 20220424 Address after: No. 1123, yunmenshan Road, Dongying District, Dongying City, Shandong Province 257000 Patentee after: DONGYING SHENG-BASED ENVIRONMENTAL ENGINEERING Co.,Ltd. Address before: 257000 No. 10, Kechuang Park, 1123 yunmenshan Road, Shengyuan street, Dongying District, Dongying City, Shandong Province Patentee before: Cornerstone aldehyde free Environmental Science Research Institute (Shandong) Co.,Ltd. |