JPH07314415A - Method and device for continuously producing particle board - Google Patents

Abstract

PURPOSE: To improve the quality of a particle board even when a thin fiber plate, e.g. 5 mm or below in thickness is produced and also a particle board or a fiber board, e.g. 16 mm or above in thickness is produced. CONSTITUTION: The compression of a press processing material 2 in an approaching port gap 11 is done by two compression steps II, III, and in the first compression step II, from weak compression of 0.5 deg. to a horizontal line and to strong compression of maximum 5 deg. in the first compression step, and strong compression of about 7 deg. or above to pressure release of about -1 deg. is acted on the material 2, the first press step transfer point D is adjusted to a convex or concave shape, and the second press step transfer point E is adjusted similarly to a convex or concave shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particle board, a fiber board by a continuous operation type press equipped with an endless flexible steel belt for pulling the pressed material through the press while transmitting the pressing pressure to the pressed material. A continuous manufacturing method for plastic boards and plywood, in which the steel belt is guided with an adjustable press gap around a press table and a press ram mechanism via a drive drum and a deflection guide drum, and is perpendicular to the belt running direction. The steel belt to the corresponding supports of the press base and the press ram mechanism via a number of rolling rods that are guided along with the steel belt with different transverse axes, and the inlet device compresses the inlet gap by an adjusting device. A method of varying the angle and a device for implementing the method It is intended.

[0002]

2. Description of the Prior Art Based on a number of methods and devices of the type described above, the compression angle in the entrance gap is adapted to the microstructure of the particle board and particle mat (pressed material) to be manufactured according to the requirements for working strength. For this purpose, it is known to change the compression angle by means of a press ram mechanism and / or an adjusting device in the press table.

According to the German patents DE 2343427 and DE 3413396, the inlet gap can be varied in compression angle depending on the requirements of use of the particle board to be manufactured. It is known to adapt by. However, the press pressure profile in the entry system can only be changed within narrow limits by continuous compression over a relatively long entry section.

Present demands for use of particle board (for example, demand for making surface lacquerable)
In order to satisfy the requirement, on the other side, a material density profile having a density of about 1100 kg / m ³ is required only in the surface layer area of the board surface. For this purpose, a rapid compression of the particle mat in the entrance gap, that is, a pressed material, that is, a steep pressure increase at the start of pressing is required. German Federal Patent No. 1938280 and German Federal Patent Application Publication No. 373418.
According to the example described in the specification No. 0, in the case of fibrous boards, in particular thin plates with a wall thickness of 2.5 mm to 5.0 mm, a convex curvature of the entry area is provided by the control of the swivelable support structure. Remarkably rapid surface compression is achieved by passing through the compressed section.

The development of continuous press technology using rolling support mechanisms nowadays allows for very long press section configurations, and thus high steel belt speeds and low press coefficients. German Federal Patent No. 1938
No. 280, German Patent Application Publication No. 37
34180 and European Patent Application Publication No. 01441.
The rapid compression of the surface layer in the arc-shaped curved entry gap, which has been put into practical use according to 63, does not increase gradually in the convex entry gap when the entry velocity is relatively high. Such compression causes air bubbles to be released from the surface along the penetration width with the start of contact of the particle mat between the upper and lower steel belts. In other words, this means that when the compression of the particle mat is started, the air accumulated in the extremely pre-compressed particle mat (pressed material) has to be shocked to escape. The air permeability of the pre-compressed surface layer changes depending on the fiber structure or the surface layer structure, for example, the high dust content in the particle mat. If the approach speed is high and the air permeability is poor,
Due to the explosive escape of the air contained in the particle mat, a swirl of dust or a swirl of fibers is generated, which causes harmful striped patterns on the pressed board or plate emerging from the continuously operating press. . Partly due to air bubbles, the entire surface area, eg 100 cm ² or more, is explosively detached from the intermediate layer, which not only visually impairs the aesthetic appearance but also makes it suitable for use on pressed boards. Requirements, eg stratification
Possibility of plywood and bending strength cannot be obtained.

However, it is known to have a fixed transition in the straight precompression zone, as described in the above-mentioned DE-A-3734180 and EP-A-0144163. The pre-compression section can adapt the vertical compression rate to the different permeability (breathability) of the surface of the particle board only by changing the entry rate or production rate. Without varying the production rate, it is not possible to compensate for the different bleeding behavior of the surface,
For example, when the dust content in the surface layer is relatively high, or when the fiber structure of the surface layer is poor in air permeability, it is necessary to reduce the production rate, and as a result, economic productivity is significantly restricted. Become.

As a further important drawback, it should be mentioned that when the compression ratio in the particle mat contact in the horizontal direction is the same as that in the vertical direction, the entering arc angle is always twice the secant angle. That is, the air outflow velocity at the entrance arc portion is doubled by the incremental compression along the entrance arc, in contrast to the linear primary compression of the mat along the secant line. , Which enhances the bubble release effect. The negative bubble-releasing effect due to the gradual compression of the particle mat at the arcuately curved front entry, which transitions to a straight variable entrance gap, as disclosed in the prior art cited above, is Published German Patent Application No. 3918
It can be minimized by the two-point joint system described in the '757 patent. However, the problem of rapidly compressing the surface layer of thin fiber plates has not been solved. This is because the pre-compression section before the first joint point is significantly longer than the subsequent compression section. Another drawback of the extremely long pre-compression zone is the increased premature cure, which results in higher polishing costs for pressed stamped material and lower material density profile (strength) at the surface. Is.

In addition to the above-mentioned drawbacks, the conventionally known variably adjustable entrance system has the following significant drawbacks in terms of equipment. That is: (a) The pressing force is extremely weakened after the particle mat or the fiber mat comes into contact with the deflection guide drum, so that unacceptable premature hardening and weakening occur from the technical point of view of the method, and the upper surface layer Will form surface cracks.

(B) The same applies to the device described in DE 38 16 511 A1. After the steel belt is deflected and guided in the curved section of the roll abutment, the steel belt is supported to the rolling rod introduction portion via the sliding surface in a substantially pressureless state.

(C) German Patent Publication No. 3 of the Federal Republic of Germany
In the configuration described in the specification of 734180, an entrance portion separate from the main press portion is clearly shown. Devices based on this system are only connected to the main press via steel belts. At this transition from the entry part to the main pressing part, a strong collapse of the pressing force profile will inevitably occur, in which case it is impossible to control the influence on the subsequent pressing process.

[0011]

The object of the present invention is to improve the manufacturing method of the type mentioned at the outset in such a way that a corresponding manufacturing device is constructed, for example to produce particularly thin fiber plates of 5 mm or less. Rapidly increases a variably adjustable pressure in consideration of a negative bubble releasing effect, and then variably adjusts a relatively low compression speed to compress the intermediate layer, while, for example, 16 mm or more. In the case of producing the particle board or the fiber board of, the pressure buildup is performed slowly in order to relatively slowly extrude a relatively large amount of air in the initial stage, and it can be variably adjusted according to the air permeability, Then, in order to immediately increase the strength of the board, it also variably and adjustablely accelerates the compression speed, which results in particle board, fiber board, plastic board and other It is to improve the quality of the rate.

[0012]

According to the method of the present invention for solving the above-mentioned problems, the pressed material in the entrance gap is compressed by two compression stages.
In the second compression stage, a light compression of 0.5 ° to a horizontal line to a strong compression of up to about 5 ° is performed. Is applied to the pressed material, and the first press step transition point is adjusted to be convex or concave, and the second press step transition point is also adjusted to be convex or concave. With the method according to the invention, it is possible to optimally realize all the process steps necessary for particle mats or fiber mats from thin to thick.

In order to solve the above-mentioned problems, the constituent means on the apparatus of the present invention is a flexible three-point joint system in which the entrance gap of a continuously operating press has three variable angle adjusting positions α, β, γ. And the compression angles α and β of both support girders can be controlled to the positive adjustment position with respect to the horizontal line by the angle control of the flat support girders that are flexibly hinged to each other in the press ram mechanism. Or the first support girder can be controlled to a positive adjustment position and the second support girder from a positive adjustment position to a negative adjustment position, in which case both support girders move to two press stages. The points occupy convex or concave positions.

[0014]

The present invention has the following advantages over the prior art. That is: (1) The straight press stages II, III and IV, which act according to the introduction of the rolling rod, are flexibly hinged to each other in an engagement connection type and a friction connection type. Press stage II upon request
To the press stage III from press stage I and press stage I
It is possible to adjust the optimum press force profile characteristic curve at the press stage transition point from II to press stage IV.

(2) By adjusting the press stages II, III, IV relative to each other in a positive or negative angular position, on the basis of the transition point of high flexibility, that is to say convex or concave engaging connection type supporting action. It is possible to variably adjust the force profile or the compression profile at the entrance on the basis of To get such adjustability
This has been impossible by the known technology.

(3) Based on the above, it becomes possible to optimally adjust the following method variations. That is: (3-a) Adjustment in the case where the air permeability of the surface layer of a board having a thickness of 10 mm or more is poor and the air vent control in the pre-compression stage II is performed at a flat press angle.

(3-b) 16 mm with good surface air permeability
Adjustments for thicker boards.

(3-c) Adjustment for a board having a wall thickness of 5 mm or less and a relatively small amount of accumulated air. Therefore, it becomes possible to adopt the rapid compression of the surface layer due to the steep pressing angle (β range) in the previous compression stage.

(3-d) Adjustment in the case of a particle board in which a high material density profile, for example, a density of about 1100 kg / m ³ and a surface wall thickness of about 0.2 mm or less with relatively good air permeability is required. . Therefore, the post compression stage III
It is possible to exert a concentration of the specific pressing force by rotating the and rotating the press angle α to the minus adjustment position.

Depending on the requirements of use of the board or plate to be produced and depending on the texture of the particle or fiber mat, and depending on the processing behavior of the entry area, the vertical pressing of the main pressing area IV. The optimum angular positions of the pre-compression stage II and the post-compression stage III with respect to the gap are measured by a computer system before the entrance gap (y ₁ = particle mat wall thickness, that is, mat cross section).
It becomes possible to control via the servo-hydraulic adjusting member according to the above.

A further advantage of the present invention is that by adapting the approach angle β in the short pre-compression stage II as in the present invention without changing the production rate, different deflation behaviors of the surface layer are compensated. In addition, the mat can be arbitrarily contacted with the upper steel belt after the upper contact or from the contact toward the next joint point in the transport direction.

By optimizing the length ratio of the pre-compression stage II and the post-compression stage III to approximately 1: 2 to 1: 4, it is suitable to avoid disadvantageous pre-curing and thus relatively high polishing costs in the surface layer. It is also possible to obtain the entrance / exit gap transit time. As a result, a relatively high surface strength is necessarily obtained in the pressed board.

The fact that the pre-compression stage II is not additionally heated can also be regarded as an advantage. That is, due to the air accumulated in the particle board or the fiber mat and the resulting expansion of the voids, the heat conduction between the wood chips, the fibers and the particles becomes poor. As a result, when it is subjected to a strong heat action, the pre-curing is strengthened in the surface layer. Therefore, according to the invention, only in the post-compression stage III, the heat is intensively supplied to the particle mats or fiber mats which have already been pre-compressed and have reduced accumulated air.

In order to reliably deliver the pressed material, that is, the particle mat or the fiber mat onto the lower steel belt, in the present invention, the lower pressed material approach tangent line F is a safe distance X and the upper approach tangent line C. It has been shifted to the front compared to. By asymmetrically entering the particle mat or the fiber mat in this way, unlike the conventional case where the particle mat or the fiber mat is brought into contact with the upper and lower steel belts symmetrically at the same time, the particle mat or the fiber mat is differently contacted. A diagonal air bleeding cross section y ₂ is created which is greater than the cross section or wall thickness y _{1 of the} mat. As the particle board becomes thinner, this diagonal cross section increases.
That is, in the case of a thin press-worked material, if the production speed is adjusted to a higher speed, the air bleeding cross section will automatically increase as the air flow velocity increases.

With the device according to claim 5, it is possible to advantageously implement the method according to the invention, in particular the variable adjustment method of the entry gap.

Advantageous embodiments of the invention on the device are as set out in claim 6 and the following.

[0027]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The continuous production equipment shown in FIGS. 1 to 5 comprises a continuously operating press 1, a feeding device 5 having a delivery nose 6 for a pressed material 2, that is, a particle mat or a fiber mat, and a continuous production equipment. The computer 13 is equipped with a servo hydraulic system 17 for controlling. The press 1 is shown substantially only in its front part. This front part is, in other words, the inlet for the pressed material 2, the feeding device 5, the inlet gap 11, and the starting point of the rolling rod alignment zone I, the front compression stage II, the post compression stage III and the main press zone IV. It is an entry area consisting of and. The main part of the press 1 is composed of a press base 9, a movable press ram mechanism 10, and a tensile column 19 connecting these two. To adjust the press gap 35, the press ram mechanism 10 is moved up and down by a hydraulic piston and cylinder unit (not shown) and then locked in the selected position. The steel belts 3 and 4 are wound around the press table 9 and the press ram mechanism 10 via one driving drum and one of the deflection guide drums 7 and 8 arranged at the end of the press ram mechanism 10 and the end of the press table 9, respectively. Guided. Heating plates 29 and 37 mounted on the press table 9 and the press ram mechanism 10 and a circulating steel belt 3,
In order to reduce the friction with 4, the carpet type rolling rod groups each composed of a large number of rolling rods 12 are also provided in a circulating manner. Rolling rods 12 having axes extending at right angles to the belt running direction and over the entire width of the press area are in this case connected to the link chains 15 on both longitudinal sides of the press 1 with a predetermined pitch dimension. In addition, the press 1 rolls along the heating plate 29 of the press ram mechanism 10 and the heating plate 37 of the press table 9 on one side, and the steel belts 3 and 4 on the other side, and carries the press work material 2 while carrying out the press 1. Guided through.

Further, as can be seen from the drawings, the rolling rod 12
Is introduced by the gears 24, 25, and the link chain 1
5 is engageably connected into the horizontal pressing plane by two inlet gears 26, 27 arranged on both sides of the support girders 14, 30 and the inlet heating plate 38, and furthermore, the inlet gear 24 and the inlet gear 26. Is supported by the press ram 10, and the introduction gear 25 and the inlet gear 27 are supported by the press base 9, respectively. The symbol B represents the starting point of the entry area (entry tangent) of the rolling rod 12, and the symbol E represents the ending point of the entry area and the starting point of the main press area IV. The rolling rods that circulate in the press table 9 and the press ram mechanism 10 are guided by the deflection guide rollers 31. In order to statically divide the entry area of the particle mat or fiber mat into the rolling rod alignment area I, the pre-compression stage II, the post-compression stage III and the main pressing zone IV, these areas are three flexible joints. The system is engaged and frictionally connected. The adjustment of the entrance gap 11 is variable depending on the compression angles α and β and the rolling rod entry angle γ.

As shown in FIGS. 2 to 5, the press section is functionally divided into four sections. I: Rolling rod 12 for lower steel belt
Kinematic arcuate rolling rod alignment zone for pressureless delivery of the, II variable surface controllable straight pre-compression stage or flat-angle bleeding stage, III intermediate layer variable controllable Primarily for curing and sizing particle mats or fiber mats with a straight post-compression stage, and IV final compression, variably adjustable press force profiles or vertical press strokes for bleeding or bleeding and sizing A straight main press area.

Rolling rod alignment area I: The particle mat or fiber mat as the pressed material 2 is
It is delivered onto the lower steel belt 4 by the feeding device 5. Lower approach tangent line F to rolling rod 12
(= Pressing material 2 on the lower steel belt 4, that is, the delivery / contact line of the particle mat or the fiber mat) is an upper approach tangent line C (= the pressing material 2 on the upper steel belt 3, that is, the particle mat or the fiber mat) Of the particle mat or the fiber mat, since the safety distance X (FIG. 1) is about 200 mm, the particle mat or the fiber mat is separated from the upper and lower steel belts 3 and 4. After passing through the lower arc portion, i.e., the rolling rod alignment area for the press table 9, without fear of tightening the front transfer nose 6 during the time, it is transferred onto the lower steel belt 4. Therefore, the contact of the particle mat or the fiber mat to the lower steel belt 4 and the upper steel belt 3 is asymmetrical according to the safety distance X. The rolling rod 12 is spring-elastically pressed against the steel belts 3, 4 by the leaf spring assembly 20 within the range of the convex arcs of the upper and lower steel belts 3, 4.

The introduction gear 24 and the inlet gear 26 are engaged and connected to the spring-elastic outflow plate 16 via a gear box 36. The leaf spring set 20 follows the cylinder stroke of the hydraulic adjusting member 28 via the gear box adjusting line 33 and the compensating girder 39 (see FIG. 6) in a frictional connection manner. A plurality of the adjusting members 28 are arranged so as to be distributed over the entire width of the pressing area. The upper approach arc portion from the start point B of the approach area to the upper approach tangent line C elastically follows the variably adjustable compression angular position β of the front compression stage II. In this case, the leaf spring set 20 includes the support girders 14
It can freely oscillate in the wedge-shaped gap 40.
The introduction gear 24 and the inlet gear 26 are the gearbox 3
It is housed as a compact unit in 6. The gear box 36 and the leaf spring set 20 are elastically connected to the next pre-compression stage II via three flexible adjusting axes, that is, the gear box adjusting lines 33 and 34 and the upper approach tangent line C. . Furthermore, the gear box 36 is supported by the rigid unit of the press ram mechanism 10 together with the leaf spring set 20 via a hydraulically actuated adjusting member 28. Since the hydraulic pressure of the cylinder of the adjusting member 28 is adjusted as a constant supporting force, the upper entry tangent line B is automatically adapted to the variable compression angular position β of the front compression stage II. That is, the angular position γ of the arc-shaped upper rolling rod entry section between the starting point B of the entry area and the entry tangent line C changes flexibly in accordance with the front compression stage II.
Straight pre-compression stage I from arcuate rolling rod alignment area I
The transition to I is carried out almost jointly with respect to the entrance tangent line C of the rolling rod 12, and the entrance tangent line C simultaneously forms the contact line of the particle mat or the fiber mat 2 in the upper steel belt 3. There is.

Regarding the front compression stage II: The straight press section of the front compression stage II starts from the flexible transition point of the approach tangent line C, and the spring-elastic transition plate 18 of the transition to the rear compression stage III. The end point is the portion of the joint turning axis D in. The support girder 14 is connected to the rear compression stage III by a joint structure so as to be engaged therewith.
The optimum compression angle position β with respect to the joint pivot axis D is controlled by the hydraulic adjusting member 21 according to operational requirements, and the adjusting member is also supported by the rigid unit of the press ram mechanism 10. The desired compression angular position β with respect to the straight support girder 30 is detected by the distance sensor 22. For the compression angle α = 0, for example, the next compression angle position β can be variably set. That is: When the compression degree is increased as compared with the post compression stage III: β ≦ + 5
°.

If the precompression stage II and the postcompression stage III form a straight line in order to extend the linear compression stage: β
≈0 °.

For example, when the compression angle α is set to about 5 ° to alleviate the precompression, for example, when air is evacuated at a flat angle in order to reduce the bubble emission, β ≧ -4 °.

The elastic transition plate 18 provided at the portion of the joint pivot axis D has a convex shape in the case of the plus angle adjustment and a concave shape in the case of the minus angle adjustment, depending on the β angle position. It is configured to follow the angle adjustment.

A distance measuring system 23 is provided in front of the entire approach system, and the distance measuring system measures the wall thickness y ₁ of the particle mat or fiber mat with the distance sensor 22 and transmits the measured value to the computer 13. . The measured value is the hydraulic adjustment member 2
Adjustment amounts for 1 and 32, provided that the particle mat or the fiber mat 2 comes into contact with the entry tangent line C above the precompression stage II, in particular after passing through the safety distance X. It is a condition. Upper and lower zones of pre-compression stage II, such as support girder 14 and inlet heating plate 38
Advantageously, the front part of the is not heated.

Post-compression stage III: Post-compression stage III
The straight press section of is about 2 to 4 times as long as the press section of the front compression stage II, and has the joint turning axis D as a starting point and the joint turning axis E as an ending point. On the lower side of the joint pivot axis E there is also a spring-elastic transition plate 18 and a roll-out plate 16, both of which form a convex or concave rolling rod 12 depending on the respective compression angle position α. It serves to support the steel belt 3 and adheres in the flexible transition zones C, D, E with each convex or concave deformation. The press section is heated up and down in order to intensively supply heat under pressure to the particle mat or fiber mat 2 which has been more or less precompressed in the preceding press section. The support girder 30 that is jointly arranged on the joint pivot axis D is moved by the hydraulic adjustment member 32 to the angular position α.
Adjusted to. The angular position α with respect to the substantially straight main pressing zone IV is still detected by the distance sensor 22. The hydraulic adjusting member 32 is also supported by the rigid unit of the press ram mechanism 10.

Regarding the main pressing zone IV: In contrast to the preceding pressing zone, this heated pressing zone is a much longer pressing zone. This is due to the required heat transport time from the surface layer to the intermediate layer and the associated curing and sizing times. Substantially rigid press ram mechanism 10
The press gap (spacing) 35 between the flat rigid press table 9 and the flat press table 9 depends on the final compression and air venting or steam venting process, and the sizing process based on the total board thickness to be substantially manufactured. Decided. Press gap 35,
Therefore, the vertical position of the upper joint pivot axis E is
Adjustment is made between the press table 9 and the press ram mechanism 10 by a hydraulic adjusting servo cylinder (not shown) arranged along the main pressing area IV.

FIG. 2 shows a state in which an ingress particle mat or fiber mat having an extremely large wall thickness y ₁ is continuously pressed. In order to avoid bubble release, the front compression angle β is adjusted by the support girder 14 to about −2 °, in contrast to the post compression angle α of about + 5.0 ° by the support girder 30 with abrupt post compression. .

In FIG. 3, the ingress particle mat or fiber mat thickness y ₁ shows a large value, but instead the front compression angle β shows a positive adjustment value of about 3 °.
That is, the pre-compression occurs more quickly than in the case of FIG. 2, whereas the post-compression occurs somewhat slowly with a post-compression angle α of about 2 °. As shown in FIG. 4, when the thickness y ₁ of the ingress particle mat or fiber mat is relatively thin, the post-compression angle α ≧ 0 ° by the support girder 30 is set, and the entire compression work is performed by the support girder 14. It is advantageous to leave the pre-compression angle β set to a steep gradient by

In the case of manufacturing the board having the high material density profile (high strength) shown in FIG. 5, after the rapid and strong pre-compression is applied by the supporting girder 14, the particle mat is formed by the start point of the main press area IV. Or fiber mat 2
In order to reduce the load on the support girder 30,
It is advantageous to adjust the angle so that it takes a negative angle.

In the diagrams of FIGS. 7 to 10, as shown in FIGS. 2 to 5, the support girder 14 is adjusted to the front compression angle β, and the support girder 30 is adjusted to the rear compression angle α. In this case, FIG. 7 is used for FIG. 2, and FIG. 8 is used for FIG.
It is shown that the state of the press pressure profile is obtained as shown in FIG. 9 for FIG. 4 and as shown in FIG. 10 for FIG. P _spez is a support girder 14,
Represents the pressing pressure (in bar) generated on the pressing surface of 30 and on the heating plates 29, 37 and the inlet heating plate 38,
Further, S represents the press distance. The arrow indicates the working direction,
The symbol H represents a horizontal line that serves as a reference for the adjusted compression angles α and β. In particular, each press pressure profile of the adjusted compression angles α and β in the front compression stage II and the post compression stage III is represented by a hatched surface.

FIG. 6 shows an arc-shaped rolling rod alignment area I.
And a precompression stage II straight from the rolling rod alignment zone I
The structural details of the transition to are shown. The leaf spring set 20 composed of two or more sheet metals is fixed to the straight portion of the support girder 14 beyond the upper approach tangent line C. A leaf spring assembly 20 and a resilient elastic plate 16 are arranged in a wedge-shaped gap 40 in such a way that they can be oscillated in order to elastically energize the rolling rod.
The compensation girder 39 is engaged with and connected to the gearbox 36 via the gearbox adjustment lines 33 and 34. As can be seen from the entire drawing, one roll-out plate 16 is provided in the press base 9 and the press ram mechanism 10 over the entire entry area from the starting point B to beyond the joint pivot axis E. Are arranged as. The roll-out plate also covers the transition plate 18 at the joint pivot axes D, E.

As a specific technical condition for manufacturing a plate-shaped or board-shaped pressed material, it is advantageous to change the entrance gap 11 in the press base 9 by a variable compression angle. For this purpose, the support rams 14 and 30 can be arranged in the same manner for the press ram mechanism 10 instead of the inlet heating plate 38 for this purpose and can be controlled accordingly.

The adjusted compression angles α and β are exaggerated for clarity.

In order to quickly compress the surface layer of the particle mat or the fiber mat 2, in terms of processing technology,
The pre-compression stage II may advantageously have a length of about 300 mm to 600 mm. All the press sections I to IV from the entrance of the rolling rod 12 to the entrance of the press table 9 and the main pressing area IV of the press ram mechanism 10 are formed by one spring-elastic outflow plate 16 for each section. Covered. The rolling-out plate has a convex shape or a concave shape especially in the elastic pivot area of the front rolling rod entrance in the rolling rod alignment zone I and the upper entry tangent line C and the joint pivot axes D, E. Helps to flexibly support when deformed. The roll-out plate 16 is the basis for fulfilling the functional role of the design dimension, in which case the wall thickness of the roll-out plate is such that the steel belts 3, 4 are used to avoid the negative effects of cold deformation on one side.
Is about 2 to 2.5 times the wall thickness. It has been found that when this dimensional standard is maintained, the one-sided locking effect due to the quenching of the leaf spring does not occur. Instead, the minimum hardness of the outflow plate 16 should be about 550 Brinell hardness to minimize wear.

The particular remarkable advantages of the method and apparatus of the present invention must be regarded as depending on the operational requirements of the board to be produced and on the texture of the particle or fiber mat 2. In particular, depending on the processing behavior and the processing state in the entry zone, in the embodiment shown in FIGS. 2 to 5 and 7 to 10, the front compression stage II and the rear compression stage III are arranged relative to the vertical position of the main press zone IV. The optimum angular position for is controlled by the computer 13 via the servo hydraulic system 17 according to the measured value of the wall thickness y ₁ of the particle mat or the fiber mat.

[Brief description of drawings]

FIG. 1 is a side view of a particle board continuous manufacturing facility according to the method of the present invention.

FIG. 2 is a side view of an entrance gap of a continuous operation type press for pressing a particle mat in the particle board continuous manufacturing facility shown in FIG.

FIG. 3 is a side view of an entrance gap of a continuously operating press showing a state where a particle mat having a different wall thickness from that of FIG. 2 is pressed.

FIG. 4 is a side view of an entrance gap of a continuously operating press showing a state where a particle mat having a different wall thickness from that of FIG. 3 is pressed.

FIG. 5 is a side view of the entrance gap of the continuously operating press showing a state where a particle mat having a different wall thickness from that of FIG. 4 is pressed.

FIG. 6 is an enlarged side view of a rolling rod alignment zone I and a support girder for front compression stage II.

FIG. 7 is a profile diagram of a pressing force at the entrance gap shown in FIG.

FIG. 8 is a profile diagram of a pressing force in the entrance gap shown in FIG.

9 is a profile diagram of pressing force in the entrance gap shown in FIG. 4. FIG.

10 is a profile diagram of a pressing force in the entrance gap shown in FIG.

[Explanation of symbols]

I Rolling rod matching zone, II Pre-compression stage, I
II post-compression stage, IV main pressing area, B start point of entry area, C upper entry tangent line, D,
E Joint rotation axis, E End point of entry area and start point of main pressing area, F Lower entry tangent line, X Safety distance, α, β compression angle, γ Rolling rod entry angle, y ₁ Particle mat or fiber mat meat Thickness, y ₂ Diagonal air bleeding cross section, H horizontal line, P _spez press pressure, S
Press distance, 1 continuous operation press, 2 particle mat or fiber mat as press material,
3,4 Steel belt, 5 Feeding device, 6
Handover nose, 7, 8 Turning guide drum, 9
Press stand, 10 Press ram mechanism, 11
Entrance gap, 12 rolling rod, 13 computer, 14 support girder, 15 link chain, 16 transfer plate, 17 servo hydraulic system, 18 transfer plate, 19 tensile column,
20 leaf spring assembly, 21 hydraulic adjusting member,
22 distance sensor, 23 distance measuring system, 24,
25 introduction gear, 26, 27 inlet gear, 28
Hydraulic adjusting member, 29 heating plate, 30
Support girder, 31 turning guide roller, 32 hydraulic adjusting member, 33, 34 gear box adjusting line, 35 press gap, 36 gear box,
37 heating plate, 38 inlet heating plate, 39
Compensation girder, 40 wedge gap

Claims (14)

[Claims] 1. Continuous particle press, fiber board, plastic board and plywood by a continuously operating press equipped with an endless flexible steel belt that pulls the pressed material through the press while transmitting the pressing pressure to the pressed material. A manufacturing method, in which the steel belt is guided with an adjustable press gap around a press table and a press ram mechanism via a driving drum and a deflection guide drum, and with a lateral axis perpendicular to the belt running direction. A type in which the steel belt is supported by a press table and a corresponding receiver of a press ram mechanism through a large number of rolling rods guided along with the steel belt, and a compression angle of an entrance gap is variable by an adjusting device. Of the pressed material (2) in the entrance gap (11) ) Compression of two compression stages (II, I
II) and moreover, in the first compression stage (II), from 0.5 ° light compression to a maximum of about 5 ° strong compression to the horizontal line, and in the second compression stage (III) to the horizontal line. From a strong compression of about 7 ° or more to a release pressure of about -1.0 ° on the pressed material, and the first press step transition point (D) is adjusted to a convex shape or a concave shape. A continuous production method of a particle board, which is characterized in that the press step transition point (E) is adjusted to be convex or concave. 2. The two compression stages (II,
The running time (time from C to D and time from D to E) of the pressed material in III) is determined by the first compression stage (I
The time ratio between I) and the second compression stage (III) is about 1: 2.
The continuous production method according to claim 1, wherein the continuous production method is selected to be 1: 4. 3. Pre-compression in the first compression stage (II) without additional heat, whereas post-compression in the second compression stage (III) with additional heat. The continuous production method according to claim 2, which is carried out. 4. A cross section (y ₁ ) of the stamped material is obtained by shifting a lower approach tangent line (F) of the stamped material (2) to the lower steel belt (4) toward the front by a safety distance (X). A continuous process according to any one of claims 1 to 3, which can increase the diagonal venting cross-section (y ₂ ) in contrast to. 5. The apparatus for carrying out the continuous production method of particle board according to claim 1, wherein the entrance gap (11) of the continuously operating press (1) has three variable angle adjustment positions (α). , Β, γ) with a flexible three-point joint system, and by the angle control of the two flexible hinged flat support girders (14 and 30) in the press ram mechanism (10), The compression angles (α, β) of both support girders (14, 30) can be controlled in a positive adjustment position relative to the horizon, or the first support girder (14) is in a positive adjustment position and the second Support girders (30) can be controlled from a positive adjustment position to a negative adjustment position, in which case both support girders (14, 30) are convex or concave at the two press stage transition points (D and E). Characterized in that occupy the position, a continuous manufacturing apparatus for particle board. 6. The entry gap (11) of the press ram mechanism (10) has three joint sections (I, II, II).
I), wherein the joint sections are convex to each other, but the second and third joint sections are concave, connected by three flexible joints at the press transition points (D and E). 5. The continuous production apparatus according to item 5. 7. The ratio of the length of the first support girder (14) to the length of the second support girder (30) is about 1: 2 to 1: 4.
The continuous manufacturing apparatus according to claim 6. 8. A press table (9) and a press ram mechanism (1)
The continuous production apparatus according to any one of claims 5 to 7, wherein the first support girder (14) of 0) is not heated and the second support girder (30) is heated. 9. A servo-hydraulic adjusting member (21, 2) for supporting angular positions (α, β, γ) of a support girder (14, 30) and a leaf spring set (20) with the aid of a computer.
8. The continuous production apparatus according to claim 5, which is adjustable via the means (8, 32). 10. An adjustment amount of an adjusting member (21, 28, 32) for a computer program is a detected value (y ₁ ) of a particle mat (2) as a pressed material.
1 and the particle mat is contacted exactly at the entry tangent line (C) at the start of the flat compression stage (II).
The continuous production apparatus according to the item. 11. The adjusting force of the adjusting member (28) acts on the gearbox (36), from which it is elastic with respect to the leaf spring assembly (20) of the wedge gap (40) via the compensating girder (39). And the rolling rod tangent line (B) is automatically adapted to the variable angular position (α, β) of the support girder (14, 30) each time. The continuous production apparatus according to item 1. 12. The approach area on the press table (9) comprises:
The press ram mechanism (10) is divided correspondingly to the entry area, and for the entry area of the press platform the inlet heating plate (38) has two joint systems like the press ram mechanism (10). 12. The continuous manufacturing device according to claim 5, wherein the continuous manufacturing device is configured in a supporting girder (14, 30). 13. The length of the pre-compression stage (II) is about 300 m.
The continuous manufacturing apparatus according to any one of claims 5 to 12, which has a length of m to 600 mm. 14. The elastic transfer plate (16) has a wall thickness of about 2.0 to 2.5 of that of the steel belts (3, 4).
6. Double and have a Brinell hardness of about 550.
The continuous manufacturing apparatus according to any one of 1 to 13.