JPH0140753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a continuous working press used particularly for manufacturing, laminating, bonding, etc. of single-layer or multi-layer sheets. In particular, it is suitable for the production of sheets consisting of webs containing at least one binder in raw materials or pretreated materials containing wood powders or chips such as cellulose and/or lignin-cellulose; The lower belt, for example made of a copper plate, rotates endlessly at a constant speed between the upper and lower running paths while holding the web between the webs. The present invention relates to a continuously operating press, which is provided with a lubricating bed plate, on which said belt slides with the aid of a pressurized lubricant fluid.

[Prior art] Federal Republic of Germany Patent Application Publication No. 2511878
No. 1 discloses a continuous working press that is equipped with a large diameter roll, a belt is stretched between the roll and the turning roll, the direction can be changed between the presses, and it can be used for both preliminary pressing and finishing pressing. has been done. The area between the presses is equipped with a pedestal that supports the belt from the back side, and a lubricating bottom plate with an arrow-shaped groove is attached to the pedestal to reduce friction between the belt and the pedestal. It is said that the structure may be configured to supply and discharge lubricant to and from the lubricant. In this press, if the belt pressing force is insufficient after the lubricating plate is brought close to the press height in the pre-press area in the case of a spread-like web, lubricant cannot be prevented from flowing out to both sides, and a considerable amount of lubricant leaks out. It turns out.

In addition, the known press is expensive to manufacture and has a large diameter roll, which increases its height. It has the disadvantage that it is not optimal for finishing presses that require high pressure.

Another known example of a similar continuous press is published in German Patent Application Publication no.
There is one disclosed in No. 1938280. The feed end of this press is equipped with a press roll on which an endless rotating belt is guided and wound. These belts sandwich and surround two endlessly rotating steel plate belts that are similarly turned by two turning rolls.
The front one of the deflecting rolls defines the starting point of the main press area in which the two sheet steel belts run parallel to each other. The front part in the running direction, from the front press roll of the steel plate belt to the beginning of the plate belt forms a preliminary press space. In the pre-pressing area, the sheet steel belt is held essentially in a single plane from the back side in a cradle with a lubricating sole made of synthetic material. The lubricating floor plate is divided into sections by joints extending transversely to the track. Each of the joints is provided with a transversely extending edge pad and a number of apertures through which pressurized lubricant fluid is introduced.

The known press has a relatively simple construction of a pedestal with a lubricated bed plate in the pre-press area, but requires a separate and expensive front press roll. Also,
The lubricating plate in the preliminary press area only supports the steel plate belt, but in order to increase the density of the product,
In order to increase the forward pushing force in the main press area, it is necessary to rotate the plate belt in addition to the steel plate belt, resulting in very high frictional forces during operation.

[Problems to be Solved by the Invention] An object of the present invention is to improve the above-mentioned known continuous working press, and to reduce the equipment height without requiring expensive drive means such as plate belts or press rolls. low cost, cheap and easy to manufacture and maintain,
Furthermore, we aim to provide products that are of high quality and are easy to operate.

[Means for Solving the Problems] To achieve this object, the continuous working press according to the invention is suitable for processing raw materials or pretreated materials containing wood powders or chips, in particular cellulose and/or lignin-cellulose. A continuous working press used for manufacturing, laminating, laminating, etc. single-layer or multi-layer plate materials made of webs containing at least one type of bonding agent, in which two steel plate belts, for example, run in upper and lower directions with the web sandwiched between them. The belt rotates endlessly at a constant speed between the belts, and lubricating pads are provided on the surfaces of upper and lower pedestals that span the entire width of the press area, and the belt is assisted by pressurized lubricant fluid. In a continuous working press configured to slide on the lubricating bed plate, the lubricating bed plate extends over at least a main press area and a subsequent finishing press area, and the lubricating bed plate is provided with a recess, and the lubricating bed plate is provided with a recess. A groove is provided in the recess extending substantially in the direction of travel for a large proportion of the overall length, and further apertures are formed, at least one opening in the recess, and a lubricant is formed in the lubricating bottom plate. It is characterized by a structure in which it is supplied to the sliding surface side of the bottom plate through the openings provided in the bottom plate, and is difficult to reach the side edges of the bottom plate.

Furthermore, the press is characterized in that the apertures are opened in the lubricant plate at a distance from both sides thereof, and the press has means for controlling the amount of lubricant supplied. The amount of lubricant may be controlled depending on the reaction force generated by the web and the belt running speed, or may be controlled at a fixed amount. Also, if desired, a lubricant can be used at a constant temperature suitable for the web or warmed to the temperature required for the curing process.

[Function] According to the present invention, a lubricating bottom plate lubricated with a lubricant fluid is interposed in at least the main press area and the finishing press area following it, and more preferably in all the press areas including the preliminary press area, thereby improving the entire press. Its production cost is extremely low compared to other products. In the present invention, the grooves in the lubrication plate are oriented in the direction of travel, unlike the grooves in the transverse direction of the prior art, which not only ensure the lubrication of the entire press area, but also ensure that the optimum amount of lubricant is supplied. Since there is no need to increase the lubricant pressure, it is possible to achieve low frictional forces and therefore high performance, and also to save driving energy. Furthermore, the great significance of the present invention is that oil reservoirs are provided around each hole of the lubricating bottom plate so as to move along with the running of the endless rotating belt.
This achieves surprisingly extremely low friction values. On the other hand, in the conventional technology, the lubricant is conveyed by the belt with a cross-disposed edge guard material, and the lubricant stays in the recessed area under static pressure, so that an appropriate flow rate can be maintained. cannot be given.
Note that in the apparatus of the present invention, a large amount of lubricant flows as described above, so if the lubricant is heated in advance, heat for heating or hardening can be supplied to the web to be pressed. This has the advantage that the quality and density of the product board can be positively influenced. In the continuous working press of the present invention, a lubricating bed plate lubricated with a lubricant is provided in the press area, so that no press rollers as in the prior art are required.
In particular, even when the above-mentioned lubricating plate is made into a module integrally with the pedestal so that it can be added to an existing press, if the module is such that a lubricating plate that does not break at the butt part can be formed in the press area, it is possible to There is no irregular or discontinuous intermittent lubricity at the divided parts.

It was surprising that the upstream roller did not have to be a very large diameter drive roller to provide enough contact friction on the roller surface to transmit traction to the lubricated backside of the belt. Again, surprisingly, a stable synovial membrane or pressure synovial membrane is formed in the device according to the invention, and the sticking phenomenon known from the prior art (German Patent Application No. 2400762) is not observed.

In a preferred embodiment of the present invention, openings for supplying and discharging lubricant are provided on the front and rear sides of each recess in the running direction, and by applying sufficient pressure, the recess having side ends on both sides can be opened. Not only is a stable synovial film formed between the protrusion and the back surface of the endlessly rotating belt, but also a large amount of lubricant can be circulated to supply a sufficient amount of heat to the web through the belt. . The width and depth of the groove are designed to correspond to the lubricant flow rate, but generally speaking, making the groove wider than the depth increases the area where the lubricant flowing through the groove comes into contact with the backside of the belt, which increases heat generation. This is preferable because it also improves transmission. However, it must not exceed the specified width. If it exceeds the limit, the lubricant pressure that should be applied to the back surface of the endlessly rotating belt will not reach the surface of the lubricating plate.

As described above, according to the present invention, although the press structure is simple, a large production volume can be reliably obtained due to the ideal homogeneous surface pressure on the web and a good reduction in friction. The thickness accuracy of the plate is extremely or fairly high. The press of the present invention can be manufactured at low cost, and its operation and effects are great, so operating costs can be reduced.

A further advantage is that conventional continuous presses can also be equipped with additional equipment, such as lubricating plates, sealing materials, connecting parts for lubricant supply and discharge in the support plate section, and cradle. This is possible by incorporating a modular additional equipment unit that combines the following:

Further embodiments and variants are described in the embodiments section of the claims. The present invention will be explained in detail below with reference to the illustrated embodiments.

[Example] Fig. 1 is a sectional view showing one embodiment of the continuous working press of the present invention, Fig. 2 is a partial top view of a lubricating bottom plate, Fig. 3 is a partial sectional view of the embodiment, and Fig. 4 5 is a detailed view of the same part, FIG. 5 is a sectional view of the same part, and FIG. 6 is a diagram showing another embodiment of the lubricating bottom plate.

The continuous working press shown in FIG. 1 is equipped with an endlessly rotating upper belt 5 and an endlessly rotating lower belt 6, and a web 7 as shown in FIG. 3 runs between both belts in the direction of the arrow. 8, while simultaneously undergoing processing such as preliminary press, main press, and finishing press.

In the entire press area 10, which includes the preliminary press area 11 and the main press/finish area 12, a lubricating bottom plate 13 made of vulcanized rubber baked onto a pedestal 14 is installed on the side opposite to the web of the belts 5, 6. It is in contact with the back surface 9. As schematically illustrated in FIG. 1, in the pre-press area the lubricating plates 13 have an inclination to each other and form a wedge-shaped press space. When several modular lubricating plate units separated into sections are incorporated, the units are arranged along the belt running direction at gradually changing angles, so that they become parallel to each other when they reach the main press section. Extend. It is also possible to design the lubricating plate in the pre-pressing area so that it curves continuously until it reaches the beginning of the main pressing area.

The lubricating bottom plate 13 of this embodiment extends over the entire width 15 and length of the entire press area, and FIG. 2 shows a top view of the main press/finishing area 12 portion (the negative part in FIG. 1). A through hole 16 is provided on the front side of the belt running direction, that is, the web conveying direction 8.
However, another through hole 20 is provided diagonally opposite each other on the rear side. Both holes 16, 20 open into the recess 19'. Several mutually parallel grooves 19 are provided between the two outermost grooves, and adjacent grooves are connected to each other by connecting grooves 21. Although the encapsulant wraps around the entire press area,
The sealing material is not shown in FIG. 2 to avoid complexity. Note that when the lubricant bottom plate 13 is partially porous with fine or coarse porosity, the lubricant is retained and the belt runs smoothly.

As shown in FIG.
The sealing material 23, which is formed as an integral part, is similarly wound in a rectangular shape. The encapsulant is made of plastic elastic material;
The sealing piece is fastened to a support member 27 with a screw 26 inserted into a through hole 25 provided in the main body 24 of the sealing piece. The head of the screw abuts against a perforated disc or flat washer 28 treated with vulcanized rubber, so that the sealing material is pressed flat against the support member 27 as a whole. An ear 29 extends from the sealing material body 24 toward the pressing area, and a sealing edge 30 of the ear abuts against the back side 9 of the belt 6. The ear 29 is pressed sealingly against the back side 9 of the belt 6 by means of a pressure receiver 31 formed of a plastic strip. The pressure receiver is fitted into a groove provided in a support member 32, which is provided with a passage 33 communicating with a collecting groove 34, as schematically shown.

FIG. 3 shows, in a simplified sectional view, an embodiment of the apparatus of the present invention which can be constructed as a modular unit for additional equipment to a conventional continuous press. As can be seen from the figure, the width of the upper belt 5 is wider than the width of the lower belt 6,
A scraping device 36 is provided in contact with the lower surface of the belt, and is used to scrape off oil that oozes out along the side edge of the belt. Both pedestals 14 and support members 27 and 32 for the sealing material and the press receiver are both fixed to the substrate 38. Lubricant supply to the side
Although discharge connection members are assembled, they are not shown here to avoid complexity. The upper and lower substrates 38 are joined together via a joint material 39 to form a unit type, and can be incorporated into other continuous working presses with a minimum of assembly and adjustment work.

FIG. 5 shows a cross section along the - line of FIG. 2. Here the lubricating bottom plate 13 is baked onto the base plate 38 and includes several grooves 19.
and a joint groove 21 that connects them together to form a recess 19'. Although not described in detail here, the through holes 16 and 20 may be provided with a connection port 40 as shown schematically for connection to the lubricant circulation path 22.

FIG. 6 schematically shows an alternative embodiment to that of FIG. 2, which is mirror symmetrical about the vertical center vertical plane. The lubricating bottom plate 13 has a running direction 8.
Several parallel grooves 19 are provided, which are joined to each other by a substantially semicircular depression 41 at the front end in the running direction 8. A through hole 20 for lubricant supply is opened in each of the semicircular portions 41. The depressions 19' in which the grooves 19 are grouped may be provided one by one across the vertical center vertical plane as shown on the left side of FIG. 1 which has mirror symmetry with respect to the plane
It may be composed of several depressions 19'. The area of the above-mentioned depression must not be more than 3/4 of the total area of the press area within the main press/finishing area.
In particular, it is preferably 1/2 or less. The supply pressure of the lubricant is determined depending on the shape of each depression, the rigidity of the endlessly rotating belt, and the purpose of use of the press, such as whether it is a web press or a veneer press.

In order to facilitate understanding of the present invention, reference numerals that can be compared with the drawings are written in the claims section, but the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the continuous working press of the present invention, Fig. 2 is a top view of the lubricating plate corresponding to the - position in Fig. 1, and Fig. 3 shows the embodiment at the - position in Fig. 2. FIG. 4 is a detailed view of the part enclosed in FIG. 3, FIG. 5 is a cross-sectional view of FIG. 2, and FIG. 6 is a diagram showing another embodiment of the lubricating bottom plate. . 5, 6...belt, 7...web, 13...
Lubricating bottom plate, 14... cradle, 16, 20... opening, 19... groove, 19'... depression, 21... joint groove, 23... sealing material, 24... main body, 27, 3
2...Supporting material, 29...Ear portion, 30...Sealing edge,
31...pressure receiver, 33...passage.

Claims (1)

[Claims] 1. A single-layer or multi-layer board consisting of a raw material or a pretreated material containing wood powder or chips, in particular cellulose and/or lignin-cellulose, and a web containing at least one binder. It is a continuous working press used for manufacturing, laminating, bonding, etc., in which two belts 5 and 6 rotate endlessly with the web sandwiched between the upper and lower running paths, and the press covers the entire width of the press area. A lubricant bottom plate 13 to which a lubricant fluid is supplied is provided on the surface of the upper and lower pedestals 14 provided on the top and bottom. A bottom plate 13 extends over at least the main press area and the finishing press area following it, and the recess 19' provided in the lubricating bottom plate is provided with a groove 19 which extends for a large proportion of its overall length substantially in the running direction. Apertures 16 and 20 are opened in the recess 19', and the lubricant is supplied from the apertures 16 and 20 to the sliding surface side of the lubricating bottom plate and has a structure in which it is difficult to reach the side edges of the lubricant plate. A continuous working press that is characterized by: 2. A continuous working press according to claim 1, in which the openings 16 and 20 are provided with a lubricating bottom plate 13.
The openings are located away from both edges of the web, and the amount of lubricant heated to a constant temperature suitable for the web or the temperature required for curing is supplied to the openings as needed during operation of the web. 1. A continuous working press characterized by having means for controlling the reaction force generated by the reaction force and the belt running speed according to or quantitatively. 3. A continuous working press according to claim 1 or 2, wherein the lubricating bottom plate 13 extends in the belt running direction at least over a main press area and a finishing press area following it, and preferably A continuous working press further comprising a preliminary press area. 4. A continuous working press according to any one of claims 1 to 3, characterized in that the lubricating bottom plate 13 is partially finely porous or coarsely porous. formula press. 5. A continuous working press according to any one of claims 1 to 4, characterized in that the recess 19' is provided with a large number of grooves 19 extending parallel to each other. formula press. 6. A continuous working press according to any one of claims 1 to 5, wherein the recesses 19' each having a large number of grooves 19 are disposed in front and behind with respect to the running direction 8, and A continuous working press, preferably characterized in that the positions are offset from each other when viewed from the running direction 8. 7. A continuous working press according to any one of claims 1 to 6, in which the plurality of grooves 19 in the recess 19' are formed into a recess 19 disposed laterally with respect to the running direction 8. A continuous working press characterized in that the press is arranged to align with the protrusions between the plurality of grooves 19 in the press. 8. The continuous working press according to any one of claims 1 to 7, wherein the groove 1
A continuous working press characterized in that the width of 9 is greater than the depth. 9. The continuous working press according to any one of claims 1 to 8, wherein the groove 1
9 are connected at their rear ends with respect to the running direction 8. 10. The continuous working press according to claim 9, wherein the front opening 16 is provided on a side of the press area, and the rear opening 20 is provided on the opposite side. A continuous working press featuring the following. 11. A continuous working press according to any one of claims 1 to 10, wherein each of the depressions 19' has a front opening 16 and a rear opening 20, and A continuous working press characterized by having a joint groove 21 connecting adjacent grooves 19. 12. The continuous working press according to any one of claims 1 to 11, wherein the sealing material 23 that strongly contacts the back surfaces of the belts 5 and 6 is in the running direction of the press area 10. 8. A continuous working press characterized in that it extends across the entire width in the transverse direction at the front start position. 13. The continuous working press according to any one of claims 1 to 12, wherein the sealing material 23 extends across the entire width in the transverse direction at the rear end position of the press area 10 in the running direction 8. A continuous working press characterized by: 14. The continuous working press according to any one of claims 1 to 13, wherein the sealing material 23 is provided at both ends of the press area 10 in parallel to the running direction 8. A continuous working press characterized by: 15. The continuous working press according to any one of claims 12 to 14, wherein the sealing material 23 is integrally formed and is wound over the entire area of the press area 10. A continuous working press characterized by: 16. A continuous working press according to any one of claims 12 to 15, wherein the sealing material 23 is integrally made of a plastic elastic material, and the main body 24 has a sealing edge 30. Ear part 2
A continuous working press characterized by having 9 formed therein. 17. The continuous working press according to claim 16, wherein the ear portion 29 is a press receiver 31.
A continuous working press characterized by being pressed by belts 5 and 6. 18. The continuous working type press according to claim 17, characterized in that the pressure receiver 31 is a plastic band material and is fitted into a groove of the support member 32. press. 19. A continuous working press according to claim 18, in which lubrication such as oil or oil mixture oozes out to the side edges of the belts 5, 6 and is blocked by the sealing edge 30 of the ear portion 29. Passage 33 through which the agent is discharged
is provided on the supporting member 32. 20. The continuous working press according to any one of claims 1 to 19, wherein the width of the upper belt 5 is wider than the width of the lower belt 6, and the width of the upper belt 5 is wider than the width of the lower belt 6. A continuous working press characterized in that scraping devices 36 are provided on both edges of the front end. 21. A continuous working press according to any one of claims 1 to 20, characterized in that the lubricating bottom plate 13 is vulcanized and baked onto the pedestal 14. formula press.