CA2042314C - Continuous press for the production of particle board and laminates - Google Patents
Continuous press for the production of particle board and laminatesInfo
- Publication number
- CA2042314C CA2042314C CA 2042314 CA2042314A CA2042314C CA 2042314 C CA2042314 C CA 2042314C CA 2042314 CA2042314 CA 2042314 CA 2042314 A CA2042314 A CA 2042314A CA 2042314 C CA2042314 C CA 2042314C
- Authority
- CA
- Canada
- Prior art keywords
- friction
- drum
- plates
- improvement defined
- linings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
- B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Braking Arrangements (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
A guide drum of continuous press for the production of chip board, fiber board and laminate board and around which a steel belt can pass, has a friction lining formed by friction plates or tiles disposed in an array of such plates abutting one another or adjoining one another with minimal butt joint gaps over the entire surface of the drum. Each friction plate of the tile array has a support plate conforming to the surface of the drum and an overlay of a friction material, especially an automotive vehicle clutch or brake lining material.
Description
2~123I4 C~ 1NUO~S PRESS FOR THE PRODUCTION OF PARTICLE BOARD
AND T.AMTN~'I'ES
SPECIFICATION
Field of the Invention The present invention relates to a continuous press for the production of particle board, especially chip board or fiber board utilizing wood or cellulosic materials and thermally-activatable binders, or laminate plates (more generally referred to as laminates herein) or the like, wherein the material to be pressed is fed between a pair of endless steel belts, passing over guide rollers which can be driven, through a zone of the press in which the material is compressed and, if desired or necessary, is heated.
Bac~4~ of the Invention In conventional continuously-operating presses of this type, the guide drums, which also are generally the drive drums of the press, can be composed of a steel structure in which a steel plate or sheet define~ the ou.er surface of the drum which can be formed with a friction lining to better engage the steel belt which passes around the drum. The closed shell of the drum thus supports, guides and drives the belt.
Prior art techniques for applying the friction lining to the drum have been found to be expensive and frequently unreliable since it is often necessary to machine the lining on the drum to be certain that the drum will be sufficiently cylindrical. A
true cylindrical configuration or a substantially cylindrical configuration of predetermined configuration is essential so that the steel belt will not shift off the drum in operation.
Various friction linings have been used for this purpose and one must be concerned with respect to the friction coefficient.
If the friction coefficient is not sufficient, slippage between the steel belt and the drum is unavoidable so that the service life of the lining and the availability of the continuous press, measured by down time for replacement and maintenance, can be detrimentally affected. In general it is not practical or possible to provide a form-fitting engagement between the guide drum and the steel belt for positive entrainment of the latter and hence friction coupling between the belt and the steel drum is a necessity.
It is the principal object of the present disclosure to provide a continuously-operating press for the purposes described which will have increased service life of the friction coupling between the drum and the belt and thus increase the availability of the press.
It is another object to provide a particle board or laminate press whereby drawbacks of other continuously operating presses are avoided.
It is especially an object to provide an improved friction coupling between a steel belt and a guide drum in a continuous press for the production of pressed board and laminates.
These objects and others which will become apparent hereinafter are attained, by providing the friction coupling between the drum and the steel bond or belt of a continuous press with friction plates in a tile-like array on the surface of the supporting drum, each of the friction plates comprising an outer friction lining or overlay and being affixed to a support plate which is attached to the surface of the drum and can have a curvature corresponding thereto. Like tiling, each of these 20423 ~ 4 friction plates can adjoin other friction plates on the surface of the drum in butt joints of a minimum gap width and which can permit slight expansion and contraction or afford direct contact between the adjoining edges as required.
The lining or overlay can be a commercial material of the type commonly used for clutch linings and/or brake linings heretofore and preferably for motor vehicle clutch or brake linings.
More specifically, in a continuous press for the production of pressed board and laminates and wherein material to be pressed is advanced through the press between a pair of steel belts passing over guide drums, here, described is an improvement wherein at least one of the guide drums is formed with a drum support having a substantially cylindrical outer surface, a tile array of friction plates covering the surface,and means for affixing the friction plates to the support at the surface, adjacent ones of the friction plates of the tile array having substantially butt joints of small gap thickness and each being formed with a support plate and a friction lining selected from the group which consists of standard ~.A~
AND T.AMTN~'I'ES
SPECIFICATION
Field of the Invention The present invention relates to a continuous press for the production of particle board, especially chip board or fiber board utilizing wood or cellulosic materials and thermally-activatable binders, or laminate plates (more generally referred to as laminates herein) or the like, wherein the material to be pressed is fed between a pair of endless steel belts, passing over guide rollers which can be driven, through a zone of the press in which the material is compressed and, if desired or necessary, is heated.
Bac~4~ of the Invention In conventional continuously-operating presses of this type, the guide drums, which also are generally the drive drums of the press, can be composed of a steel structure in which a steel plate or sheet define~ the ou.er surface of the drum which can be formed with a friction lining to better engage the steel belt which passes around the drum. The closed shell of the drum thus supports, guides and drives the belt.
Prior art techniques for applying the friction lining to the drum have been found to be expensive and frequently unreliable since it is often necessary to machine the lining on the drum to be certain that the drum will be sufficiently cylindrical. A
true cylindrical configuration or a substantially cylindrical configuration of predetermined configuration is essential so that the steel belt will not shift off the drum in operation.
Various friction linings have been used for this purpose and one must be concerned with respect to the friction coefficient.
If the friction coefficient is not sufficient, slippage between the steel belt and the drum is unavoidable so that the service life of the lining and the availability of the continuous press, measured by down time for replacement and maintenance, can be detrimentally affected. In general it is not practical or possible to provide a form-fitting engagement between the guide drum and the steel belt for positive entrainment of the latter and hence friction coupling between the belt and the steel drum is a necessity.
It is the principal object of the present disclosure to provide a continuously-operating press for the purposes described which will have increased service life of the friction coupling between the drum and the belt and thus increase the availability of the press.
It is another object to provide a particle board or laminate press whereby drawbacks of other continuously operating presses are avoided.
It is especially an object to provide an improved friction coupling between a steel belt and a guide drum in a continuous press for the production of pressed board and laminates.
These objects and others which will become apparent hereinafter are attained, by providing the friction coupling between the drum and the steel bond or belt of a continuous press with friction plates in a tile-like array on the surface of the supporting drum, each of the friction plates comprising an outer friction lining or overlay and being affixed to a support plate which is attached to the surface of the drum and can have a curvature corresponding thereto. Like tiling, each of these 20423 ~ 4 friction plates can adjoin other friction plates on the surface of the drum in butt joints of a minimum gap width and which can permit slight expansion and contraction or afford direct contact between the adjoining edges as required.
The lining or overlay can be a commercial material of the type commonly used for clutch linings and/or brake linings heretofore and preferably for motor vehicle clutch or brake linings.
More specifically, in a continuous press for the production of pressed board and laminates and wherein material to be pressed is advanced through the press between a pair of steel belts passing over guide drums, here, described is an improvement wherein at least one of the guide drums is formed with a drum support having a substantially cylindrical outer surface, a tile array of friction plates covering the surface,and means for affixing the friction plates to the support at the surface, adjacent ones of the friction plates of the tile array having substantially butt joints of small gap thickness and each being formed with a support plate and a friction lining selected from the group which consists of standard ~.A~
3~ ~
clutch and brake linings secured to the support plate and defining with the friction linings of the other friction plates of the array a substantially cylindrical belt-engaging layer.
I have found surprisingly, that commercial material, which s have been employed in modern technology as clutch linings and brake linings, can satisfy all of the requirements for a frictional interengagement between the steel belt and t~.t? .~uid~ drllm ln ~
continuous press for the production of chip bo~rd, fiber board, laminated boards and the li~e, when this mat~rial is used in a lining on a support plate to form a friction plllte mounted on the drum of the press in a tile array. This is especially the case when the lining material is a motor vehicle brake or clutch lining.
A detrimental slip between the guide drum and the steel belt which passes therearound is no lon~ler a problem. Friction coeffi-cients of 0.4 and greater can b~ used. The fact that there are gaps or butt joints between the friction plates arranged in the tile array also is not found to be detri~ental but rather, quite surprisingly, is found to increase the overall friction coupling between the drum and the belt.
of course, the friction plates must follow the curvature of the surface of the drum and must be correspondingly curved. The joints whiCh are formed can be perpendicular to the drum surface and can extend along generatrices and circumferences of the drum.
The linings which are composed of commercially-available clutch lining or brake lining materials are readily capable of withst~nding the temperatures which arise in continuous presses for the production of chip board, fiber board, laminate plates and the like. This applies whether the drums are heated or nonheated.
The linings are also sufficiently oil resistant. The fastening of the friction plates on the drum surface and the function thereof are not adversely influenced by thermal expansion and contraction. The friction plates may be secured S to the surface with prestress or with bracing against one another as desired. Tests have shown that continuous presses provided with the new tile arrays provide extremely long service lives of the friction material and thus improved availability of the press as a whole.
According to a feature of this disclosure, the support plate for the friction plate of the invention is a steel plate whose thickness can be about 4 mm for a standard continuous press for the purposes described.
Various materials commonly used for brake shoes and clutch plates as linings in the motor vehicle industry may be employed and, in general, I may make use of materials based upon synthetic resin or synthetic rubber binders and containing wear-resistant fillers. Alternatively, the lining can be of ceramic material.
For standard laminating of the pressed board presses, the lining thickness should be about 8 mm.
In a continuous press here described, the drive torque which is to be applied to the steel belts is delivered by the drum through the friction lining to the belt. It is thus important that there be a sufficiently shear-resistant connection of the lining to the support plate of the friction plate. This can be achieved, in accordance with a further feature by providing an adhesive bond between each lining and the respective support plate.
The drum shell is also composed of steel and it is essential that the connection between the friction plates and the steel shell be capable of withstanding the aforedescribed torque. For this purpose the means connecting the friction plate to the shell may include a screw connection or an equivalent thereto such as a rivet connection.
The friction plates, which are precurved to conform to the curvature of the drum, can be mounted and dismounted in a simple manner.
In general, the plates can be rectangular, a special case of which is a square plate.
The linings can also play a thermodyanmic role. For example, in the case of a heated guide drum, the lining may contain a metallic filler to provide a high conductivity path between the drum and the belt. In the case in which the drum is unheated,the filler in the friction lining may be a thermally nonconductive filler so that the lining plays a heat-lagging or insulating role between the drum and the steel belt. The running of the steel belt can thus be positively influenced.
More particularly in accordance with the invention there is provided, in a continuous press for the production of pressed board and laminates and wherein material to be pressed is advanced through the press between a pair of steel belts passing over guide drums, the improvement wherein at least one of said guide drums is formed with a drum support having a substantially cylindrical outer surface, a tile array of friction, plates covering said surface, each of said friction plates being of generally rectangular configuration and elongated fastening means for affixing said friction plates to said support at said surface, adjacent ones of said friction plates of said tile array having substantially butt joints of small gap thickness and each being formed with a support plate and a friction lining selected from the group which consists of standard clutch and brake linings secured to said support plate and defining with the friction linings of the other friction plates of said array a substantially cylindrical belt-engaging layer.
Embodiments of the invention will now be described, reference being made to the accompanying drawings in which:
FIG. l is a diagrammatic partial side elevational view of a continuous press for the production of chip board, fiber board, laminate plates or the like;
FIG. 2 is an elevational view of a guide drum of the press of FIG. l but shown to a larger scale and partly broken away;
FIG. 3 is a plan view of a friction plate which can applied to that drum, shown greatly enlarged in scale with respect to FIG. 2;
.~ '~
FIG. 4 is a cross sectional view taken along the line IV-IV
of FIG. 3; and FIG. 5 is a section taken along the line V-V of FIG. 3 but additionally illustrating the plate in place upon the drum and diametrically showing it to be engaged by the steel belt.
Description of the Preferred Embodiments As can be seen from FIG. 1, a continuous press for the production of chip board, fiber board, laminate plates, and the like, can comprise a plurality of guide and drive drums 2, only two of which have been illustrated in the drawing, around which steel belts 3 pass, the steel belts defining a pressing gap 3a between them, through which the material 4 is pressed and is fed for compaction. The press also can comprise platens 20 and 21 which can be heated, e.g. with circulating steam, and which can, if desired, inject steam into the material 4 through perforations in the belts 3, if desired.
Advantageously, continuous presses of this type are well known in the art of the manufacture of pressed board and as laminating presses and will not be described in greater detail herein. Suffice it to say that a drum 2 can have a friction surface represented generally at 5 so that each drum can frictionally entrain the respective belt 3 to drive the latter as represented by the arrows 22, 23, 24 and 25 in FIG. 1.
From FIG. 2 it will be apparent that the drum 2 can comprise a support shell 26 mounted on a shaft 27 and formed with a surface 10 upon which the friction material 5 is provided.
From FIG. 2 it is also apparent that the friction material 5 is formed by a multiplicity of friction plates 6 which are shown to be of rectangular configuration and can be curved to conform to the contours of the surface 10 (FIG. 4) and which are disposed in a tile array so that butt joints 7 of narrow gap width are formed between the friction plates which completely cover the surface 10.
From FIG. 2 it is apparent that these joints are aligned at 7a along generatrices and at 7_ along circumferences of the drum.
20423 1 ~
FIGS. 3-5 show that each friction plate 6 or tile of the drum is comprised, in turn, of a support plate 8 and a covering or overlay 9 which can be bonded thereto by an adhesive layer 17 (FIG. 5). To further resist shear, the covering 9 may be molded around the support plate 8 at 18 so as to flank the edges of the support plate and define the flanks 29 which form the joints 7.
these flanks 29 constitute abutment edges 11 which extend perpendicular to the surface 10 of the drum. In addition, and also to resist shear, the plate 8 may be perforated so as to have holes 30 into which protuberances 31 of the overlay 9 can extend.
The plates 8 are composed of steel and the overlay 9 can be a commercial material utilized as a clutch lining and/or brake lining, preferably a lining material for an automotive vehicle clutch plate and/or brake shoe.
The friction plates 6 follow the geometry of the shell 26 of the drum 2 as is apparent from the curvature of the plate 6 shown in FIG. 4.
Comparison of FIGS. 4 and 5 will further show that the gap 7 between adjoining plates may provide a slight clearance so that the edges 11 will abut only at the elevated temperature at which the drum operates. At lower temperatures there can be a slight clearance of say a fraction of a mm.
The adjoining friction plates may, however, be in contact at their edges at all times.
The steel plates 8 can have a thickness of about 4 mm. The lining 9 can have a basis or matrix of synthetic resin or synthetic rubber and can contain a wear-resistant filler.
Alternatively, the lining 9 can be of ceramic brake lining material. Its thickness can be about 8 mm.
As shown in the drawing,the friction plates 8 have an elongated rectangular outline. However, they can be square.
They can be mounted with a predetermined prestress on the drum shell and surface 10 or can be braced against one another as already noted. For heated drums 1, the overlay 9 can contain a metallic filler so as to have a high thermal conductivity. For unheated drums 2, it is advantageous, to utilize a filler of low thermal conductivity in the drum. Fillers of low thermal ..1~
conductivity can include silica particles while metal particles of high thermal conductivity can be composed of copper. The usual fillers for automotive brake linings and clutch linings may be incorporated in the overlay 9 otherwise. In the embodiment illustrated in FIGS. 2-4, the plates 6 can be secured utilizing a screw as represented, for example, by way of the screw head 33 shown in Fig. 3.
2~ 2314 In a best mode embodiment, however, the plates 6 are secured to the shell 26 of the drum 2 by fastening assemblies 12 and 13 which can include bushings 12 and blind rivets or pins 13 passing through the bushing 12 and braced against washers 34. The bushings 12 are snugly received in the bores 35 of the drum 2 and act as force-transmitting members. With the friction surface 5 formed by the friction tiles 6, it is found that the friction surface has an extremely high service life and thus that the press incorporating same has a correspondingly long operating duration without down time.
clutch and brake linings secured to the support plate and defining with the friction linings of the other friction plates of the array a substantially cylindrical belt-engaging layer.
I have found surprisingly, that commercial material, which s have been employed in modern technology as clutch linings and brake linings, can satisfy all of the requirements for a frictional interengagement between the steel belt and t~.t? .~uid~ drllm ln ~
continuous press for the production of chip bo~rd, fiber board, laminated boards and the li~e, when this mat~rial is used in a lining on a support plate to form a friction plllte mounted on the drum of the press in a tile array. This is especially the case when the lining material is a motor vehicle brake or clutch lining.
A detrimental slip between the guide drum and the steel belt which passes therearound is no lon~ler a problem. Friction coeffi-cients of 0.4 and greater can b~ used. The fact that there are gaps or butt joints between the friction plates arranged in the tile array also is not found to be detri~ental but rather, quite surprisingly, is found to increase the overall friction coupling between the drum and the belt.
of course, the friction plates must follow the curvature of the surface of the drum and must be correspondingly curved. The joints whiCh are formed can be perpendicular to the drum surface and can extend along generatrices and circumferences of the drum.
The linings which are composed of commercially-available clutch lining or brake lining materials are readily capable of withst~nding the temperatures which arise in continuous presses for the production of chip board, fiber board, laminate plates and the like. This applies whether the drums are heated or nonheated.
The linings are also sufficiently oil resistant. The fastening of the friction plates on the drum surface and the function thereof are not adversely influenced by thermal expansion and contraction. The friction plates may be secured S to the surface with prestress or with bracing against one another as desired. Tests have shown that continuous presses provided with the new tile arrays provide extremely long service lives of the friction material and thus improved availability of the press as a whole.
According to a feature of this disclosure, the support plate for the friction plate of the invention is a steel plate whose thickness can be about 4 mm for a standard continuous press for the purposes described.
Various materials commonly used for brake shoes and clutch plates as linings in the motor vehicle industry may be employed and, in general, I may make use of materials based upon synthetic resin or synthetic rubber binders and containing wear-resistant fillers. Alternatively, the lining can be of ceramic material.
For standard laminating of the pressed board presses, the lining thickness should be about 8 mm.
In a continuous press here described, the drive torque which is to be applied to the steel belts is delivered by the drum through the friction lining to the belt. It is thus important that there be a sufficiently shear-resistant connection of the lining to the support plate of the friction plate. This can be achieved, in accordance with a further feature by providing an adhesive bond between each lining and the respective support plate.
The drum shell is also composed of steel and it is essential that the connection between the friction plates and the steel shell be capable of withstanding the aforedescribed torque. For this purpose the means connecting the friction plate to the shell may include a screw connection or an equivalent thereto such as a rivet connection.
The friction plates, which are precurved to conform to the curvature of the drum, can be mounted and dismounted in a simple manner.
In general, the plates can be rectangular, a special case of which is a square plate.
The linings can also play a thermodyanmic role. For example, in the case of a heated guide drum, the lining may contain a metallic filler to provide a high conductivity path between the drum and the belt. In the case in which the drum is unheated,the filler in the friction lining may be a thermally nonconductive filler so that the lining plays a heat-lagging or insulating role between the drum and the steel belt. The running of the steel belt can thus be positively influenced.
More particularly in accordance with the invention there is provided, in a continuous press for the production of pressed board and laminates and wherein material to be pressed is advanced through the press between a pair of steel belts passing over guide drums, the improvement wherein at least one of said guide drums is formed with a drum support having a substantially cylindrical outer surface, a tile array of friction, plates covering said surface, each of said friction plates being of generally rectangular configuration and elongated fastening means for affixing said friction plates to said support at said surface, adjacent ones of said friction plates of said tile array having substantially butt joints of small gap thickness and each being formed with a support plate and a friction lining selected from the group which consists of standard clutch and brake linings secured to said support plate and defining with the friction linings of the other friction plates of said array a substantially cylindrical belt-engaging layer.
Embodiments of the invention will now be described, reference being made to the accompanying drawings in which:
FIG. l is a diagrammatic partial side elevational view of a continuous press for the production of chip board, fiber board, laminate plates or the like;
FIG. 2 is an elevational view of a guide drum of the press of FIG. l but shown to a larger scale and partly broken away;
FIG. 3 is a plan view of a friction plate which can applied to that drum, shown greatly enlarged in scale with respect to FIG. 2;
.~ '~
FIG. 4 is a cross sectional view taken along the line IV-IV
of FIG. 3; and FIG. 5 is a section taken along the line V-V of FIG. 3 but additionally illustrating the plate in place upon the drum and diametrically showing it to be engaged by the steel belt.
Description of the Preferred Embodiments As can be seen from FIG. 1, a continuous press for the production of chip board, fiber board, laminate plates, and the like, can comprise a plurality of guide and drive drums 2, only two of which have been illustrated in the drawing, around which steel belts 3 pass, the steel belts defining a pressing gap 3a between them, through which the material 4 is pressed and is fed for compaction. The press also can comprise platens 20 and 21 which can be heated, e.g. with circulating steam, and which can, if desired, inject steam into the material 4 through perforations in the belts 3, if desired.
Advantageously, continuous presses of this type are well known in the art of the manufacture of pressed board and as laminating presses and will not be described in greater detail herein. Suffice it to say that a drum 2 can have a friction surface represented generally at 5 so that each drum can frictionally entrain the respective belt 3 to drive the latter as represented by the arrows 22, 23, 24 and 25 in FIG. 1.
From FIG. 2 it will be apparent that the drum 2 can comprise a support shell 26 mounted on a shaft 27 and formed with a surface 10 upon which the friction material 5 is provided.
From FIG. 2 it is also apparent that the friction material 5 is formed by a multiplicity of friction plates 6 which are shown to be of rectangular configuration and can be curved to conform to the contours of the surface 10 (FIG. 4) and which are disposed in a tile array so that butt joints 7 of narrow gap width are formed between the friction plates which completely cover the surface 10.
From FIG. 2 it is apparent that these joints are aligned at 7a along generatrices and at 7_ along circumferences of the drum.
20423 1 ~
FIGS. 3-5 show that each friction plate 6 or tile of the drum is comprised, in turn, of a support plate 8 and a covering or overlay 9 which can be bonded thereto by an adhesive layer 17 (FIG. 5). To further resist shear, the covering 9 may be molded around the support plate 8 at 18 so as to flank the edges of the support plate and define the flanks 29 which form the joints 7.
these flanks 29 constitute abutment edges 11 which extend perpendicular to the surface 10 of the drum. In addition, and also to resist shear, the plate 8 may be perforated so as to have holes 30 into which protuberances 31 of the overlay 9 can extend.
The plates 8 are composed of steel and the overlay 9 can be a commercial material utilized as a clutch lining and/or brake lining, preferably a lining material for an automotive vehicle clutch plate and/or brake shoe.
The friction plates 6 follow the geometry of the shell 26 of the drum 2 as is apparent from the curvature of the plate 6 shown in FIG. 4.
Comparison of FIGS. 4 and 5 will further show that the gap 7 between adjoining plates may provide a slight clearance so that the edges 11 will abut only at the elevated temperature at which the drum operates. At lower temperatures there can be a slight clearance of say a fraction of a mm.
The adjoining friction plates may, however, be in contact at their edges at all times.
The steel plates 8 can have a thickness of about 4 mm. The lining 9 can have a basis or matrix of synthetic resin or synthetic rubber and can contain a wear-resistant filler.
Alternatively, the lining 9 can be of ceramic brake lining material. Its thickness can be about 8 mm.
As shown in the drawing,the friction plates 8 have an elongated rectangular outline. However, they can be square.
They can be mounted with a predetermined prestress on the drum shell and surface 10 or can be braced against one another as already noted. For heated drums 1, the overlay 9 can contain a metallic filler so as to have a high thermal conductivity. For unheated drums 2, it is advantageous, to utilize a filler of low thermal conductivity in the drum. Fillers of low thermal ..1~
conductivity can include silica particles while metal particles of high thermal conductivity can be composed of copper. The usual fillers for automotive brake linings and clutch linings may be incorporated in the overlay 9 otherwise. In the embodiment illustrated in FIGS. 2-4, the plates 6 can be secured utilizing a screw as represented, for example, by way of the screw head 33 shown in Fig. 3.
2~ 2314 In a best mode embodiment, however, the plates 6 are secured to the shell 26 of the drum 2 by fastening assemblies 12 and 13 which can include bushings 12 and blind rivets or pins 13 passing through the bushing 12 and braced against washers 34. The bushings 12 are snugly received in the bores 35 of the drum 2 and act as force-transmitting members. With the friction surface 5 formed by the friction tiles 6, it is found that the friction surface has an extremely high service life and thus that the press incorporating same has a correspondingly long operating duration without down time.
Claims (11)
1. In a continuous press for the production of pressed board and laminates and wherein material to be pressed is advanced through the press between a pair of steel belts passing over guide drums, the improvement wherein at least one of said guide drums is formed with a drum support having a substantially cylindrical outer surface, a tile array of friction plates covering said surface, each of said friction plates being of generally rectangular configuration, and elongated fastening means for affixing said friction plates to said support at said surface, adjacent ones of said friction plates of said tile array having substantially butt joints of small gap thickness and each being formed with a support plate and a friction lining selected from the group which consists of standard clutch and brake linings secured to said support plate and defining with the friction linings of the other friction plates of said array a substantially cylindrical belt-engaging layer.
2. The improvement defined in claim 1 wherein said friction linings are motor vehicle clutch or brake linings.
3. The improvement defined in claim 1 wherein each of said support plates is a steel plate.
4. The improvement defined in claim 3 wherein each of said steel plates has a thickness of about 4 mm.
5. The improvement defined in claim 4 wherein each of said friction linings is formed as a matrix of a synthetic resin or synthetic rubber in which a wear-resistant filler is embedded.
6. The improvement defined in claim 4 wherein said friction lining is a ceramic material.
7. The improvement defined in claim 4 wherein each of said friction linings has a thickness of about 8 mm.
8. The improvement defined in claim 4 wherein each of said friction linings is adhesively bonded to the respective support plate.
9. The improvement defined in claim 4 wherein said means for affixing includes a screw connection between the respective friction plate and said drum support at said cylindrical outer surface.
10. The improvement defined in claim 4 wherein each of said friction linings contain a metal filler for promoting heat conduction between said belt and said drum support.
11. The improvement defined in claim 4 wherein each of said friction linings contain a filler of low thermal conductivity for thermally insulating against heat conduction between said drum support and said belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4015143.3 | 1990-05-11 | ||
| DE19904015143 DE4015143A1 (en) | 1990-05-11 | 1990-05-11 | Continuous double steel band press - runs bands over driven drums which are covered with steel plates bonded to outer surface sheets of high friction lining material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2042314A1 CA2042314A1 (en) | 1991-11-12 |
| CA2042314C true CA2042314C (en) | 1998-09-01 |
Family
ID=6406182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2042314 Expired - Lifetime CA2042314C (en) | 1990-05-11 | 1991-05-10 | Continuous press for the production of particle board and laminates |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2042314C (en) |
| DE (1) | DE4015143A1 (en) |
| FI (1) | FI107241B (en) |
| SE (1) | SE505999C2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT401691B (en) * | 1995-01-20 | 1996-11-25 | Hordos Harald | BALL JOINT WITH FRICTION COVERINGS FOR UNDERWATER LIGHTNING ARMS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2400762C3 (en) * | 1974-01-08 | 1979-03-15 | Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen | Measure and device to increase the friction in continuous belt presses |
-
1990
- 1990-05-11 DE DE19904015143 patent/DE4015143A1/en active Granted
-
1991
- 1991-05-07 SE SE9101374A patent/SE505999C2/en not_active IP Right Cessation
- 1991-05-10 FI FI912290A patent/FI107241B/en active
- 1991-05-10 CA CA 2042314 patent/CA2042314C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| SE9101374L (en) | 1991-11-12 |
| FI912290A0 (en) | 1991-05-10 |
| DE4015143A1 (en) | 1991-11-14 |
| SE9101374D0 (en) | 1991-05-07 |
| SE505999C2 (en) | 1997-11-03 |
| DE4015143C2 (en) | 1993-03-18 |
| FI912290A (en) | 1991-11-12 |
| FI107241B (en) | 2001-06-29 |
| CA2042314A1 (en) | 1991-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |