CN104502197B - A kind of continuous pre-compression test method of medium density fibre board (MDF) slab - Google Patents
A kind of continuous pre-compression test method of medium density fibre board (MDF) slab Download PDFInfo
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- CN104502197B CN104502197B CN201410856254.3A CN201410856254A CN104502197B CN 104502197 B CN104502197 B CN 104502197B CN 201410856254 A CN201410856254 A CN 201410856254A CN 104502197 B CN104502197 B CN 104502197B
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- 239000000835 fiber Substances 0.000 title claims abstract description 124
- 238000012669 compression test Methods 0.000 title claims abstract description 30
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- 238000003825 pressing Methods 0.000 claims abstract description 44
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 27
- 239000011521 glass Substances 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims abstract description 7
- 239000011094 fiberboard Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 229920005479 Lucite® Polymers 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 239000004926 polymethyl methacrylate Substances 0.000 claims 1
- 239000002609 medium Substances 0.000 description 20
- 238000005056 compaction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 241000219000 Populus Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000013587 production medium Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The fiber containers that a kind of continuous pre-compression test device of medium density fibre board (MDF) slab is made by micro-processor controlled omnipotent mechanics machine, fiber compressing apparatus, using transparent organic glass pipe is constituted；Fiber compressing apparatus is connected with the force snesor lower end below omnipotent mechanics machine press beam, is lifted with press beam；Fiber containers is placed on the base of omnipotent mechanics machine；Fiber compressing apparatus is overlapped with the center line of fiber containers.Fiber compressive amount, pressing time, the compression-loaded speed of different phase in slab pre-compression test are determined according to the structure of the continuous preformer of medium density fibre board (MDF), and the condensing routine of the descending motion of press beam is worked out according to these parameters, the force snesor pressure that record pressing plate is subject in real time automatically, the active force that the pressing plate that force snesor is recorded is subject to is converted into the active force in unit area, and draw unit pressure displacement curve, position and lifting surface area with reference to each pressure roller of continuous preformer, can obtain the actual pressure born on every a pair of pressure rollers.
Description
Technical field
The invention belongs to timber process unit field, it is related to fiber panel manufacturing apparatus, specially a kind of medium density fiber
The continuous pre-compression test method and device of plate slab.
Background technology
Medium density fibre board (MDF) be using raw materials such as undersized log, brush wood and wood machining residues by chipping, defibrator process,
A kind of sheet material that the processes such as applying glue, drying, shaping, precompressed, hot pressing, cutting edge, sanding are processed, tool has been widely used.Into
Continuous slab band after type is very fluffy, and thickness is big, density is very low, and influence transport and slab enter hot press.Therefore, in hot pressing
Need to carry out precompressed to slab before, exclude air in slab, increase slab density and reduce thickness, improve slab itself strong
Degree, to facilitate mat conveyor and enter hot press.Fibre board industry high speed development in recent years, with medium density fibre board (MDF) yield
Increase, production efficiency is higher, the continuous preformer of the more preferable fiberboard of pre-compressed effect is at home and abroad widely applied, current state
The continuous preformer of fiberboard of interior production is designed and developed on the basis of with reference to external existing product mostly, in R＆D process
In do not know each pressure roller specific pressure size suffered in actual production work before and after continuous preformer, when the pressure of design
Roller diameter can cause pressure roller in actual production to be broken when too small, and if the diameter of design is too big, can not only give the peace of preformer
Dress maintenance is made troubles, and can also increase press R＆D costs.It is determined that rational pressure roller diameter need to determine that continuous preformer exists
Pressure size on each pressure roller in pre-compaction process, so medium density fibre board (MDF) actual production process can be simulated by designing one kind
Middle slab pre-compaction process, the continuous preformer of fiberboard slab is measured when slab is pre-stressed into different-thickness suffered by each pressure roller
The experimental method and device of pressure, the technical barrier for being badly in need of solving as art technology.
The content of the invention
In order to solve problem, this hair present in slab preformer design process in current medium density fibre board (MDF) production process
The bright one kind that provides can simulate actual production medium density fibre board (MDF) slab pre-compaction process, measure the continuous precompressed of fiberboard slab
The test method and device of machine pressure suffered by each pressure roller in precompressed.
The technical scheme adopted by the invention to solve the technical problem is that：
(1) the continuous pre-compression test device of a kind of medium density fibre board (MDF) slab, by micro-processor controlled omnipotent mechanics machine A,
Fiber compressing apparatus B, fiber containers C are constituted；Force snesor below fiber compressing apparatus B and omnipotent mechanics machine A press beams d
The adpting flange f connections of e lower ends, are lifted with press beam d；Fiber containers C is placed on omnipotent mechanics machine A base g；Fiber
Compression set B is overlapped with fiber containers C center line.
(2) fiber compressing apparatus B is made up of connector 1, depression bar 2, pressing plate 3, and depression bar 2 is round metal bars, lower end processing one
Section external screw thread, upper surface is provided with screwed hole；Pressing plate 3 is rosette, and tapped through hole is opened in centre, with the lower end external thread section of depression bar 2
Connection；One section of external screw thread is machined with the lower surface of connector 1, is connected with the screwed hole of the upper surface of depression bar 2；Connector 1
Disc face on be provided with screwed hole corresponding with the position in hole on adpting flange f, connector 1 passes through screw 7 and adpting flange f and connected
Connect.
(3) fiber containers C is made up of transparent organic glass pipe 4, bottom plate 5, soket head cap screw 6, and transparent organic glass pipe 4 leads to
Soket head cap screw 6 is crossed to be connected with bottom plate 5.
(4) there is fit clearance between the external cylindrical surface of pressing plate 3 and the inwall of transparent organic glass pipe 4, both nominals are straight
Footpath is identical.
(5) length of depression bar 2 is more than the height of transparent organic glass pipe 4.
(6) diameter 3mm aperture is provided with pressing plate 3, for discharging air in fiber.
(7) altitude scale chi is posted in the outer surface of transparent organic glass pipe 4 along short transverse, shows the height of fiber, zero
Scale is located at the upper surface of bottom plate.
(8) a kind of continuous pre-compression test method of fiberboard slab, comprises the following steps：
Step 1, slab determined according to the structure of the continuous preformer of medium density fibre board (MDF) slab used in actual production
Fiber compressive amount Δ h, pressing time T, the compression-loaded speed v of different phase in pre-compression test；Before and after continuous preformer
Neutral distance between the upper lower compression roller of diverse location pressure roller, calculates slab slab height after the compression of diverse location pressure roller
The fiber compressive amount Δ h of different phase in changing value, that is, pre-compression test；According to the center between front and rear diverse location pressure roller
Pressing time T of the slab in front and rear different phase is calculated away from L and slab speed of service V, calculation formula is T=L/V；According to fibre
Dimension decrement Δ h and pressing time T calculates compression-loaded speed v, and calculation formula is v=Δs h/T；
Step 2, according to fiberboard slab precompressed different phase fiber compressive amount Δ h, pressing time T, compression-loaded
Speed v, writes the condensing routine of press beam d descending motion, to control fiber pressure on omnipotent mechanics machine A control microcomputer
Compression apparatus B pressing plate moves downward conpressed fibers according to the compression displacement amount of setting, pressing time and compression-loaded speed；
Step 3, density and thickness requirement according to the medium density fibre board (MDF) suppressed, and transparent organic glass pipe are interior
Footpath, calculates the fibre weight needed for pre-compression test, weighs fiber and fiber is loaded into fiber containers C, fiber is in nature heap
Cumuliformis state, fiber containers C is placed on base g, and overlaps fiber containers C and fiber compressing apparatus B center line；
Step 4, startup condensing routine, press beam d descending motions, pressing plate 3, which is inserted into transparent organic glass pipe 4, compresses fine
Dimension, the force snesor e pressure that record pressing plate is subject in real time automatically, after condensing routine terminates, press beam d moves up return automatically, makes pressure
Plate 3 is on fiber containers C；
After the completion of step 5, experiment, the active force that the pressing plate 3 that force snesor e is recorded is subject to is converted into unit area
Active force, and unit pressure-displacement curve is drawn, position and lifting surface area with reference to each pressure roller of continuous preformer can be obtained
The actual pressure born on every a pair of pressure rollers.
The beneficial effect that the present invention is brought is：Medium density fibre board (MDF) plate slab can accurately be measured and be compressed to different thickness
Bounce when spending, is held so as to accurately simulate continuous each pressure roller of preformer in the continuous pre-compaction process of medium density fibre board (MDF) slab
The pressure received, the optimization design for continuous preformer provides foundation.
Brief description of the drawings
Fig. 1 is the medium density fibre board (MDF) slab pre-compression test device total figure of the present invention.
Fig. 2 is the medium density fibre board (MDF) slab fiber compressing apparatus of the present invention and the structure chart of fiber containers.
Fig. 3 is the fiber containers figure for posting altitude scale chi.
Fig. 4 is the front view of pressing plate.
Fig. 5 is the sectional view of pressing plate.
Fig. 6 is a kind of continuous preformer pressure roller distribution map.
In Fig. 1, the omnipotent mechanics machines of A-, B- fiber compressing apparatus, C- fiber containers, d- press beams, e- force snesors,
F- adpting flanges, g- bases.
In fig. 2,1- connectors, 2- depression bars, 3- pressing plates, 4- transparent organic glass pipe, 5- bottom plates, 6- soket head cap screws,
7- screws.
Embodiment
The embodiment to the present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, medium density fibre board (MDF) slab pre-compression test device of the invention is by microcomputer
Omnipotent mechanics machine A, fiber compressing apparatus B, the fiber containers C compositions of control；Fiber compressing apparatus B and omnipotent mechanical test
The adpting flange f connections of force snesor e lower ends below machine A press beams d, are lifted with press beam d；Fiber containers C is placed on omnipotent power
On the base g for learning testing machine A；Fiber compressing apparatus B is overlapped with fiber containers C center line.
Fiber compressing apparatus B is made up of connector 1, depression bar 2, pressing plate 3, and depression bar 2 is round metal bars, and lower end is processed outside one section
Screw thread, upper surface is provided with screwed hole；Pressing plate 3 is rosette, and centre is opened tapped through hole, is connected with the lower end external thread section of depression bar 2；
One section of external screw thread is machined with the lower surface of connector 1, is connected with the upper surface upper screwed hole of depression bar 2；The disk of connector 1
Screwed hole corresponding with the position in hole on adpting flange f is provided with face, is connected by screw 7 with adpting flange f.
Fiber containers C is made up of transparent organic glass pipe 4, bottom plate 5, soket head cap screw 6, and transparent organic glass pipe 4 passes through
Soket head cap screw 6 is connected with bottom plate 5；Container is done using transparent organic glass pipe, can conveniently observe what fiber in container was compressed
Process and pressing plate move up the bounce-back situation of fiber after return.
There is fit clearance between the external cylindrical surface and the inwall of transparent organic glass pipe 4 of pressing plate 3, both nominal diameter phases
Together, it is 80mm；The external diameter of transparent organic glass pipe 4 is 100mm.
The length of depression bar 2 is more than the height of transparent organic glass pipe 4, a diameter of 30mm of depression bar.Transparent organic glass pipe 4
Thickness during fibre mat shaping is depended highly on, such as density is 900kg/m3, finished plate thickness be 7.8mm poplar Midst density
Fiberboard, thickness during plate blank molding is about 150mm.The height for taking transparent organic glass pipe 4 is 320mm, can meet simulation
The slab pre-compression test of production board thick 16mm.
88 diameter 3mm aperture is provided with pressing plate 3, for discharging air in fiber.
Altitude scale chi is posted in the outer surface of transparent organic glass pipe 4 along short transverse, shows the height of fiber, zero graduation
Positioned at the upper surface of bottom plate.
Using the continuous pre-compression test method of medium density fibre board (MDF) slab of the present invention, comprise the following steps：
Step 1, the structure of the continuous preformer of medium density fibre board (MDF) slab according to used in actual production determine plate
Fiber compressive amount Δ h, pressing time T, the compression-loaded speed v of different phase in base pre-compression test；As shown in fig. 6, according to even
Distance between the upper lower compression roller of diverse location pressure roller, calculates slab and compresses back plate by diverse location pressure roller before and after continuous preformer
Base height change value, that is, in pre-compression test different phase fiber compressive amount Δ h；According between front and rear diverse location pressure roller
Centre-to-centre spacing L and slab speed of service V calculate pressing time T of the slab in front and rear different phase, calculation formula is T=L/V；
Compression-loaded speed v is calculated according to fiber compressive amount Δ h and pressing time T, calculation formula is v=Δs h/T；Pre-compression test side
Case such as table 1 below, when production density is 900kg/m3, finished plate thickness be 7.8mm poplar medium density fibre board (MDF) when, slab operation
Speed V=240mm/s, according to table 1, slab preload pressure testing program parameter is shown in Table 2.
The fiberboard slab pre-compression test scheme of table 1
The slab pre-compression test parameter of table 2
Step 2, according to fiberboard slab precompressed different phase fiber compressive amount Δ h, pressing time T, compression-loaded
Speed v, writes the condensing routine of press beam d descending motion, to control fiber pressure on omnipotent mechanics machine A control microcomputer
Compression apparatus B pressing plate moves downward conpressed fibers according to the compression displacement amount of setting, pressing time and compression-loaded speed；
Step 3, density and thickness requirement according to the medium density fibre board (MDF) suppressed, and transparent organic glass pipe are interior
Footpath, calculates the fibre weight needed for pre-compression test, weighs fiber and fiber is loaded into fiber containers C, fiber is in nature heap
Cumuliformis state, fiber containers C is placed on base g, and overlaps fiber containers C and fiber compressing apparatus B center line；
Step 4, startup condensing routine, press beam d descending motions, pressing plate 3, which is inserted into transparent organic glass pipe 4, compresses fine
Dimension, the force snesor e pressure that record pressing plate 3 is subject in real time automatically, after condensing routine terminates, press beam d moves up return automatically, makes pressure
Plate 3 is on fiber containers C；
After the completion of step 5, experiment, the active force that the pressing plate 3 that force snesor e is recorded is subject to is converted into unit area
Active force, and unit pressure-displacement curve is drawn, position and lifting surface area with reference to each pressure roller of continuous preformer can be obtained
The actual pressure born on every a pair of pressure rollers.
The beneficial effect that the present invention is brought is：Medium density fibre board (MDF) plate slab can accurately be measured and be compressed to different thickness
Bounce when spending, is held so as to accurately simulate continuous each pressure roller of preformer in the continuous pre-compaction process of medium density fibre board (MDF) slab
The pressure received, the optimization design for continuous preformer provides foundation.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow those skilled in the art
Present disclosure can be understood and implemented according to this, it is not intended to limit the scope of the present invention.It is all smart according to the present invention
The equivalent change or modification that refreshing essence is made, should all be included within the scope of the present invention.
Claims (5)
1. a kind of continuous pre-compression test method of fiberboard slab based on the continuous pre-compression test device of medium density fibre board (MDF) slab, its
It is characterised by：The continuous pre-compression test device of medium density fibre board (MDF) slab is by micro-processor controlled omnipotent mechanics machine A, fiber
Compression set B, fiber containers C are constituted；Under force snesor e below fiber compressing apparatus B and omnipotent mechanics machine A press beams d
The adpting flange f connections at end, are lifted with press beam d；Fiber containers C is placed on omnipotent mechanics machine A base g；Fiber pressure
Compression apparatus B is overlapped with fiber containers C center line；
Fiber compressing apparatus B is made up of connector (1), depression bar (2), pressing plate (3), and depression bar (2) is round metal bars, lower end processing one
Section external screw thread, upper surface is provided with screwed hole；Pressing plate (3) is rosette, and tapped through hole is opened in centre, with spiral shell outside depression bar (2) lower end
Line section connection；One section of external screw thread is machined with connector (1) lower surface, is connected with the upper surface upper screwed hole of depression bar (2)；
Screwed hole corresponding with the position in hole on adpting flange f is provided with the disc face of connector (1), connector (1) passes through screw (7)
It is connected with adpting flange f；
Fiber containers C is made up of transparent organic glass pipe (4), bottom plate (5), soket head cap screw (6), transparent organic glass pipe (4)
It is connected by soket head cap screw (6) with bottom plate (5)；
The continuous pre-compression test method of fiberboard slab, comprises the following steps：
Step 1, slab precompressed determined according to the structure of the continuous preformer of medium density fibre board (MDF) slab used in actual production
Fiber compressive amount Δ h, pressing time T, the compression-loaded speed v of different phase in experiment；According to different before and after continuous preformer
Neutral distance between the upper lower compression roller of position pressure roller, calculates slab slab height change after the compression of diverse location pressure roller
Value, that is, in pre-compression test different phase fiber compressive amount Δ h；According to the centre-to-centre spacing L between front and rear diverse location pressure roller
Pressing time T of the slab in front and rear different phase is calculated with slab speed of service V, calculation formula is T=L/V；According to fiber
Decrement Δ h and pressing time T calculate compression-loaded speed v, and calculation formula is v=Δs h/T；
Step 2, according to fiberboard slab precompressed different phase fiber compressive amount Δ h, pressing time T, compression-loaded speed
V, works out the condensing routine of press beam d descending motions, to control fiber compressing apparatus on omnipotent mechanics machine A control microcomputer
B pressing plate moves downward conpressed fibers according to the compression displacement amount of setting, pressing time and compression-loaded speed；
The internal diameter of step 3, density and thickness requirement according to the medium density fibre board (MDF) suppressed, and transparent organic glass pipe,
The fibre weight needed for pre-compression test is calculated, fiber is weighed and fiber is loaded into fiber containers C, fiber is in natural packing shape
State, fiber containers C is placed on base g, and overlaps fiber containers C and fiber compressing apparatus B center line；
Step 4, startup condensing routine, press beam d descending motions, it is fine that pressing plate (3) is inserted into compression in transparent organic glass pipe (4)
Dimension, the force snesor e pressure that record pressing plate is subject in real time automatically, after condensing routine terminates, press beam d moves up return automatically, makes pressure
Plate (3) is on fiber containers C；
After the completion of step 5, experiment, the active force that the pressing plate (3) that force snesor e is recorded is subject to is converted into unit area
Active force, and unit pressure-displacement curve is drawn, position and lifting surface area with reference to each pressure roller of continuous preformer can be obtained
The actual pressure born on every a pair of pressure rollers.
2. the continuous pre-compression test method of fiberboard slab according to claim 1, it is characterised in that：Fiber compressing apparatus B
There is fit clearance between the external cylindrical surface and transparent organic glass pipe (4) inwall of center platen (3), both nominal diameter phases
Together.
3. the continuous pre-compression test method of fiberboard slab according to claim 1, it is characterised in that：Fiber compressing apparatus B
The length of middle depression bar (2) is more than the height of transparent organic glass pipe (4).
4. the continuous pre-compression test method of fiberboard slab according to claim 1, it is characterised in that：Fiber compressing apparatus B
Diameter 3mm aperture is provided with center platen (3), for discharging air in fiber.
5. the continuous pre-compression test method of fiberboard slab according to claim 1, it is characterised in that：In fiber containers C thoroughly
Altitude scale chi is posted in the outer surface of bright lucite tube (4) along short transverse, shows the height of fiber, and zero graduation is located at bottom plate
(5) upper surface.
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| CN108225647A (en) * | 2018-04-11 | 2018-06-29 | 山东农业大学 | A kind of device and measuring method for measuring the quenched pressure of fodder grass |
| CN109147524A (en) * | 2018-10-19 | 2019-01-04 | 刘永康 | A kind of sodium-water reaction demonstration teaching aid |
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