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
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/34—Heating or cooling presses or parts thereof
• • 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
  • B30B5/062—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 urged by directly-acting fluid pressure
• • 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
  • B30B5/065—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 using anti-friction means for the pressing band
  • B30B5/067—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 using anti-friction means for the pressing band using anti-friction roller means

Definitions

• the invention relates to a double belt press with at least two belts for pressing a compact, wherein the double belt press has at least one compression region.
• double belt presses In many applications, where a compact is pressed and hardened during a machining and manufacturing process, so-called double belt presses are used.
• One such application which is exemplified herein, is the production of flexible circuit boards in which copper is laminated to a film-like substrate.
• Such flexible printed circuit boards are usually constructed of several layers which are pressed together.
• an epoxy resin system can be provided in this case.
• a first compression is usually carried out in an isochoric compression region of the double belt press, and then the pressed part is cured under pressure in an isobaric reaction region.
• a compact is understood in this document to mean any type of material or structure to be pressed.
• the compact may be a layered structure of two or more layers to be pressed together or even just one molding compound which is formed into a plate or a block, etc.
• a double belt press of the type mentioned is known from DE 20311381 U.
• an isochronous compression zone is located in front of an isobaric reaction zone.
• the compaction area has rolling bodies, for example roller carpets.
• a distance between the two bands of the double belt press is constant in the known embodiment in the isochoric compression region.
• a disadvantage of the known embodiment is, above all, that the isochoric compression region can not be operated in an isobaric operation, which, if this would be required by the process, has the consequence that the double belt press has to be rebuilt and adapted accordingly. It is therefore an object of the invention to overcome the above-mentioned disadvantage of the known embodiment.
• This object is achieved according to the invention with a double belt press of the type initially mentioned in that the compression region can be switched between an isochronous operation with a predetermined distance between the two belts and an isobaric operation with a predetermined pressure to be exerted by the belts on the pressed product.
• the compression region is also in an operation in which a pressure to be kept constant for within a range of distances of distances between the bands or a constant distance between the bands for within a range of values is determined by pressing pressures, is switchable.
• a further advantageous variant of the invention consists in that the compression region has rolling bodies for pressure transmission, wherein the rolling bodies can be pressed against at least one belt of the double belt press via at least one controllable actuator facing away from a gap between the two belts, the at least one actuator having at least one Control is arranged, which is adapted to generate at least one control signal and transmit to the actuator and to keep constant according to a previously made by a user selection either the distance between the bands of the double belt press and / or the pressure in the compression area ,
• a regulation of the pressure or the distance between the bands in the compression region can be realized by controlling at least one signal transmission path with at least one distance detection sensor and / or at least one pressure detection sensor for monitoring the distance between the bands in the compression region and / or the pressure in the compression area is connected.
• the controller is adapted to at least one of the at least one distance detection sensor and / or at least one pressure detection sensor detected actual value for the distance and / or at least one actual value for the pressure with at least one in a memory the control setpoint or to compare at least one threshold for the distance and / or at least one stored in a memory of the controller setpoint or at least a threshold value for the pressure and to actuate the actuators depending on a deviation of the actual and setpoint.
• An embodiment which is characterized by a simple construction provides that on both sides of a gap formed between the bands in the compression zone, each with at least one actuator operable rolling elements are arranged. According to a development of this embodiment, it can be provided that at least one pressure transmission element is provided, which is connected to the at least one actuator and can be pressed by these in the direction of the belt against the rolling bodies.
• the pressure-transmitting element has heating elements or is designed as a heating plate.
• FIG. 1 shows a double-belt press according to the invention
• FIG. 2 shows a cross section through the region III of FIG. 1 parallel to a strip surface of the double belt press
• FIG. 3 shows a cross section through an isobaric region III in FIG. 1 perpendicular to the strip surface and parallel to the conveying direction of the double belt press;
• FIG. 4 shows a heating element for the isobaric region III from FIG. 1.
• a double belt press 1 has at least two endless belts 2, 3, which are guided over deflecting rollers 4 and arranged one above the other.
• the upper band is provided with the reference numeral 2 and the lower band with the reference numeral 3.
• the bands 2 and 3 are preferably metal bands, in particular steel bands.
• the double belt press 1 has a compression region 5 and an isobaric pressing region 6, which are arranged one behind the other in the conveying direction F of the double belt press 1.
• the isobaric pressing region 6 is arranged in front of the sealing region 5 in the conveying direction F of the double belt press 1.
• the isobaric pressing region 6 can have a wedge-shaped cross-sectional shape parallel to a surface of one of the bands 2, 3, wherein a tip 7 of the wedge-shaped cross-sectional shape is aligned against the conveying direction F of the double belt press 1.
• the isobaric pressing region 6 can each have a frame 9 on both sides of a gap 8 formed between the bands 2, 3.
• the frame 9 includes, as shown in FIG. 3 can be seen, a base plate 10 with a circumferential on the respective band 2, 3 adjacent seal 11.
• the seal 11 which bears against an inner band surface of one of the bands 2, 3, the base plate 10 is spaced from the strip surface of the respective band 2, 3.
• the term inner strip surface is understood to mean a strip surface facing away from the gap 8.
• Due to the inner band surface and the frame 9, a pressure chamber 12 can be filled with a fluid to generate pressure.
• the base plate 10 has a circumferential groove at its edges, the open side of the inner band surface of the respective band 2, 3 faces. The seal 11 is inserted in this groove.
• the seal 11 may be in one piece manufacturedbidlet or have a plurality of directly adjacent sections. Furthermore, the seal 11, which grinds on the respective inner band surface due to the movement of the associated band, may be formed of metal or plastic, for example Teflon or rubber. This design of the seal 11, a low friction between the belt surface and the seal 11 can be realized.
• the base plate 10 may have at least one inlet opening 13 for filling the pressure chamber 12 with the fluid. Furthermore, the base plate 10 may have at least one outlet opening 14 for discharging the fluid from the pressure chamber 12.
• the outlet opening 14 may, for example, have a controllable valve.
• At least one heating element 15 may be arranged on the base plate 10.
• the heating element 15 may be formed as shown in Fig. 4 as a heating coil with windings. Instead of a single heating element 15, of course, a plurality of heating elements can be used.
• the base plate 10 may have spacers 16.
• the spacers 16 may be integrally formed with the base plate 10 or as its own components that are attached to the base plate 10, be realized.
• the heating element 15 may be provided with a cover 17 which rests on the spacers 16 and is spaced therefrom by the heating element 15.
• the compression region 5 can be designed, for example, as an isochronous compression region, that is to say with a fixed size of the gap 8.
• the compression region 5 is switchable between an isochronous operation with a predetermined distance between the two belts 2, 3 and an isobaric operation with a predetermined pressure to be exerted by the belts 2, 3 on a compact 18.
• the compression region 5 may also be switchable into an operation in which a pressure to be kept constant for distances within a range of distances between the bands 2, 3 or a constant distance between the bands 2, 3 within a range of values is determined by pressing pressures.
• the switching between the individual operating modes of the double belt press can be done for example by selecting a desired mode by a user.
• a corresponding input can be made by the user via a user interface shown on a screen and connected to a controller 21.
• the input can also be effected by actuation of a corresponding switch on an input unit of the double belt press 1 connected to the controller 21.
• the compression region 5 can have rolling elements 19 for pressure transmission.
• the rolling elements 19 may, for example, form a rod carpet or be designed as rollers, etc., and be pressed against one or more controllable actuators 20 against a surface of the band 2 or 3 facing away from the gap 8.
• the actuators 20 may be designed, for example, as electromechanical, hydraulic, etc. actuators.
• the actuator or the actuators 20 are connected to the controller 21, for example, a micro or signal processor.
• the controller 21 is adapted to generate at least one control signal S and to transmit to the actuator (s) 20 and according to a selection previously made by a user either the distance between the belts 2, 3 of the double belt press 1 and / or the pressure in the compression area 5 to keep constant.
• the controller 21 may be connected via signal transmission lines 22 and 23 to at least one distance detection sensor 24 and / or at least one pressure detection sensor 25 for monitoring the distance between the belts 2, 3 in the compression region 5 and / or the pressure in the compression region 5.
• the signal transmission sections 22 and 23 may be wired, for example by means of electrical or optical conductors, or implemented by radio.
• the controller 21 can be set up to compare actual values detected by the distance detection sensor 24 and / or at least one pressure detection sensor 25 with corresponding setpoint values stored in a memory 26 of the controller 21 and the actuators depending on a deviation of the actual and desired values 20 to operate. In this way, a control loop for regulating the pressure and / or the size of the gap 8 in the compression region 5 can be realized.
• the switchable compression region 5 for example, a fixed distance between the two belts 2 and 3 or the opposing rolling elements 19 assigned to the respective belts 2, 3 or a constant pressure in the compression region 5 can be set.
• the actuators 20 may be attached to a separate frame, which in turn may be connected to a base frame of the double belt press 1.
• the actuators 20 do not necessarily act directly on the rolling elements 19 but may be connected to a pressure transmission element 27, for example a pressure plate.
• the pressure transmission element 27 can be pressed by the associated actuators 20 in the direction of the respective band 2, 3 against the roller body 19 and moved away from the rolling elements 19 again.
• the actuators 20 each have at least one lockable spring. In an operation in which the springs are not blocked, the actuators 20 can be compressed against a direction of action of a restoring force caused by the springs, for example gas springs, coil springs, etc., which acts in the direction of the rolling bodies 19. This allows a variable gap size dependent on the shape of the compact 18 between the two bands 2 and 3. By blocking the springs of the actuators 20, a fixed gap size between the two bands 2 and 3 can be set.
• the pressure transmission element or arranged on both sides of the gap 8 pressure transmission elements 27 may also be formed as a heating plate and having one or more heating elements.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Press Drives And Press Lines (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49758942

Family Applications (1)

Country Status (2)

Citations (9)

• 2013
  • 2013-10-04 WO PCT/AT2013/050198 patent/WO2014052998A1/fr not_active Ceased
  • 2013-10-04 AT ATA9354/2013A patent/AT520169B1/de not_active IP Right Cessation

Patent Citations (9)

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