WO2011153975A2 - Poste de thermoformage, installation de thermoformage, procédé de formage ou d'estampage et articles fabriqués par ce procédé - Google Patents

Poste de thermoformage, installation de thermoformage, procédé de formage ou d'estampage et articles fabriqués par ce procédé Download PDF

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Publication number
WO2011153975A2
WO2011153975A2 PCT/DE2011/000369 DE2011000369W WO2011153975A2 WO 2011153975 A2 WO2011153975 A2 WO 2011153975A2 DE 2011000369 W DE2011000369 W DE 2011000369W WO 2011153975 A2 WO2011153975 A2 WO 2011153975A2
Authority
WO
WIPO (PCT)
Prior art keywords
drive
thermoforming station
tool
mold
thermoforming
Prior art date
Application number
PCT/DE2011/000369
Other languages
German (de)
English (en)
Other versions
WO2011153975A3 (fr
Inventor
Wolfgang Frey
Original Assignee
Kiefel Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kiefel Gmbh filed Critical Kiefel Gmbh
Priority to US13/702,764 priority Critical patent/US20130152660A1/en
Priority to EP11733552.1A priority patent/EP2576186A2/fr
Priority to DE112011101935T priority patent/DE112011101935A5/de
Publication of WO2011153975A2 publication Critical patent/WO2011153975A2/fr
Publication of WO2011153975A3 publication Critical patent/WO2011153975A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/38—Opening, closing or clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/18—Toggle-link means

Definitions

  • thermoforming thermoforming, molding or stamping
  • the invention relates to a thermoforming station, a thermoforming plant with such a station, a method for molding or stamping and an article produced therewith.
  • thermoforming processes on specially equipped systems using thermoforming tools.
  • the actual core step is carried out at the thermoforming station.
  • a heated base material is deformed there by means of a molding tool with an upper tool and a lower tool under the action of force of a press.
  • Actuators act on the mold, more precisely on the upper tool and the lower tool.
  • a lower drive acts on the lower tool and lifts this up to the thermoforming process against the upper tool.
  • an upper drive engages the upper tool and lowers it to form against the lower tool.
  • thermoforming stations in which one of the two tool parts stands and only the other part is moved.
  • a drive unit usually a motor.
  • each motor performs rotational work.
  • a gearbox usually an eccentric shaft and a toggle lever, the rotational motion output of the motor is translated into the linear motion on the tool.
  • a driven tool part may be driven by one or more motors via one or more toggle levers and one or more eccentric shafts and one or more other actuators.
  • these variants are to be assumed to be known to the person skilled in the art. For easier readability of the present application is therefore not linguistically further differentiated. Rather, an indefinite article is used to describe "one or more” items unless it is contextually implied that "exactly one" item is meant.
  • the rotating motors on a thermoforming station usually two motors, namely one on the upper tool and one on the lower tool, can introduce unwanted vibrations into the tools or the station frame. This is especially true when the motors are arranged in the same direction. This is the case when two motors or when more than two motors exert torque about an axis imagined by the station, these torques adding together. In particular, at each startup or braking then adding rotary pulses are applied to a tool part or on the thermoforming station.
  • This phenomenon is particularly noticeable when either one or all or at least more than the other direction continuously running motors are arranged on one tool part. This phenomenon can also occur if, with reference to the entire thermoforming station, there are a plurality of, in particular all, under certain circumstances also more than counter-rotating corotating motors.
  • EP 1 832 408 A2 proposes a thermoforming station in which the two motors rotate in opposite directions on the lower tool. The induced by the two motors angular momentum therefore cancel each other out.
  • the invention has for its object to provide an improved thermoforming system.
  • thermoforming station having a forming tool with an upper and a lower tool and with a drive for the forming tool for moving into an open and a closed position
  • the drive has two drive units, which In operation, each having a drive direction of rotation and act to move the mold via an actuating element on the mold, wherein the actuators each have a Betreli whyselement loftsinn in operation, and wherein two drive units are arranged for the mold with gleichnnenem drive direction and at the same time via gear for driving the actuators are arranged with opposite actuator rotation direction.
  • the invention has recognized that the quite complicated opposing orientation of the rotational sense of two motors proposed by EP 1 832 408 A2 is not necessary. Rather, the real key to a quiet and precise run on a thermoforming system is that the actuators work in the same direction and thus cancel their impulses at least largely. Whether the engines are Che have an opposite or a similar direction of rotation, is of little relevance to the product quality according to the findings of the inventor.
  • the differently designed gears ensure that the actually decisive impulses essentially cancel each other out.
  • the starting and braking torques of the two co-rotating drive units add up with respect to the thermoforming station. If the moments cancel each other exactly, the system runs as far as possible free from interference pulses.
  • the two drive units can move the upper tool via two upper actuators.
  • each drive unit preferably attacks exactly one actuating element.
  • two drive units can act on two lower ends of a lower yoke on the lower tool.
  • Both lower drive units preferably access exactly one eccentric shaft and, in each case, precisely one or two toggle levers via the eccentric shaft.
  • the eccentric shaft and the toggle joint thus form a gear together and become here referred to as "actuator", wherein each of these two components as well as their entirety represents an "actuator”.
  • the drive units preferably have vertical axes of rotation.
  • thermoforming station A drive unit with a vertical axis of rotation can be integrated into the thermoforming station to save space. As a result, the entire thermoforming station builds very small, allowing for a compact thermoforming system.
  • two drive units are arranged at the same height on the thermoforming station, in particular two at two yokes, of which one yoke is provided for the upper and one for the lower tool.
  • the upper and the lower tool are screwed back directly to the yoke, so the upper tool below the Oberjochs, corresponding to the lower tool above the lower yoke.
  • all drive units for the lower tool are arranged at a height, and / or all drive units for the upper tool are arranged at a height.
  • the drive units for the upper and the lower tool are arranged one above the other.
  • the actuating elements can at least partly consist of an eccentric shaft. In this case, but also in others rotatory components for driving the mold, it seems promising when actuators have horizontal axes of rotation.
  • the drive units introduce torques and angular momentum, ie rotational movements.
  • the mold itself must be guided at least largely linear. A part of the transmission is therefore necessary to convert the rotational movement of the drive units in the linear movement of the mold. For this toggle levers are very suitable.
  • the inventor has provided that the drive units for the upper and / or lower tool can be coupled via an electric shaft.
  • An "electric wave” is understood to mean a fine control of the drive units in relation to each other.
  • a second aspect of the invention proposes that a drive unit, in particular a motor-gear unit, can be arranged at several points along the actuating element.
  • the "actuator” should be understood to mean, in particular, the assembly of the eccentric shaft and the toggle lever, whereas the “motor-gearbox unit” should be understood as the connection between the motor and the actuating element.
  • the “transmission” is thus attributed to the engine rather than the actuator unit.
  • the second aspect of the invention can be realized in particular when drive units are arranged such that they protrude perpendicular to the axis of the eccentric shaft, in particular in a vertical arrangement.
  • a drive unit can be connected to each eccentric shaft.
  • the eccentric shafts as such, even if they are four pieces, can each be designed identically in principle, as well as the toggle lever. This leads to a high degree of rationalization in the production of the thermoforming station.
  • the drive units can be connected to any position along each eccentric shaft.
  • the stated object solves a thermoforming station in which the upper tool and the lower tool have identical tables and / or yokes, which are merely arranged the other way around.
  • thermoforming station having a forming tool with an upper and a lower tool and with a drive for the forming tool for moving in an opening and closing direction
  • the drive having two drive units which each have a direction of rotation during operation and act on the molding tool via an actuating element for movement of the molding tool, the actuating elements each having an actuating element rotation direction during operation, the moving upper and / or lower tool being mounted in a tumbling manner, in particular with one Vertical guide, which allows axial rotation.
  • thermoforming station runs with significantly higher operational reliability and production accuracy.
  • a linear rotary unit is provided, which is arranged perpendicular to the stroke direction and preferably perpendicular to the feed direction of the material through the thermoforming station.
  • the table can always move along the actual axis of symmetry and rotate on its center line on its own axis.
  • the rotation angle required for this purpose depends on the drive geometry, for example on the toggle joint geometry.
  • the stated object solves a thermoforming station having a forming tool with an upper and a lower tool and with a drive for the forming tool for moving into an opening and a closed position, wherein the drive comprises two drive units which in operation each have a drive direction of rotation and act to move the mold via an actuating element on the mold, wherein the actuating elements each have a Betuschistselement loftsinn in operation, wherein an upper yoke for the upper tool and a lower yoke for the lower tool are connected to each other via Oberjoch crampn wherein a Oberjoch basic has an overload device.
  • Oberjoch There are usually four Oberjoch that the Oberjoch and the Unterjoch. Often these are simply vertical, round supports with full or hollow cross-section,
  • the ⁇ berjoch rests on the Oberjoch 100n. Together with the lower yoke, it forms the two static elements which ultimately drive the upper and lower tools and provide the necessary counterforce for the thermoforming process.
  • the upper yoke supports are subject to pressure.
  • the compressive force in the Oberjoch bon can be coated. If the drives drive the upper and lower tools against each other with a greater force than the upper tool can apply to its own weight, the Oberjoch gan are neutral or even loaded on train.
  • the upper yoke supports must be designed for large forces. However, sometimes larger forces can occur during operation which then lead to damage to the system.
  • the overload device is provided. It is a deliberate weak point in the force system between Oberjoch, Oberjoch basic and Unterjoch. The overload device fails before the Oberjoch basic, Oberjoch or Unterjoch are damaged.
  • the overload device is thus to some extent a deliberate weak point, or a desired deformation point in the force system.
  • the overload device may for example comprise a spring assembly, a shear pin and / or a compression sleeve.
  • a "spring package” is understood to mean a plurality of springs, for example, an equal number of identical springs on each upper yoke support. The particular advantage with springs is that they are reversible within a relatively large overforce range, if the design is suitable, and thus not once the overload device is damaged.
  • a "shear pin” is sheared off when excessive force is applied, for which there is a force threshold below the force threshold, which acts as a lateral force on the shear pen acts, it remains stable. Above the force threshold, the pen shears and allows idle.
  • a "compression sleeve” fails linearly, ie on pressure, above a force threshold.
  • a spring assembly and a compression sleeve can be arranged in particular in the lifting direction.
  • a shear pin is preferably arranged to the stroke direction, but in any case at an angle to the stroke direction.
  • the overload device may comprise a shutdown means, a logging means and / or quirks.
  • a "shut-off means” means a means which shuts off a part of the thermoforming plant or the entire thermoforming plant, in particular, the intention is to switch off movements.
  • the cut-off means can be electronic or mechanical.
  • An electronic function is, for example, when a sensor detects that the overload device has failed and has thus been activated. The electronics can then access the plant control and stop all movements.
  • a logging means is designed in particular electronically.
  • the logging means can in any case state that the overload device has been activated. Surprisingly, this is particularly advantageous when it comes to a versible activation of the overload device is, so for example, an activation of spring packs.
  • shut-off means A mechanical effect of the shut-off means can be imagined, for example, in that a fuse is pulled by mechanical force or that a necessary power transmission part is pulled out of the force flow in case of failure of the overload device.
  • a log can be used to understand that an overload situation has occurred.
  • a "means of acknowledgment" may consist, in particular, of an operator manually pressing a button, inserting a key and turning a key Card or otherwise must identify and connect the control of the system must actively set in motion before the system continues to run. In particular, it can be provided that only operators of a higher hierarchical level can actuate the acknowledgment means. [72] In the event of a shutdown, this would ensure that a qualified technician can inspect the condition of the installation while it is resting. Only if it detects no errors, which may also include an immediate display or inspection of a log, the system is released for further movement.
  • the stated object solves a thermoforming station having a forming tool with an upper and an outer tool and a drive for the molding tool for moving in an opening and a closing direction, the drive having two drive units which in operation in each case have a drive direction of rotation and act on the molding tool via an actuating element in each case, the actuating elements each having an actuating element rotation direction, wherein an upper yoke for the upper tool and a lower yoke for the lower tool are connected to each other via Oberjoch crampn, wherein - as throughout the present application - the term "via one actuator" does not preclude two drive units from acting together on an actuator, with a table guide being formed separately from the upper yoke supports t.
  • the upper yoke supports preferably do not assume any guiding function for the linear movement of the table stroke. Rather, the linear guide is left to the "table guide.” As a result, the upper yoke supports are free of transverse forces, with the exception of those very small transverse forces which can be introduced into the upper yoke supports at the top and bottom. [75] Experiments by the inventor have shown that excellent product qualities can be achieved with such a task-based separation between supporting forces in upper yoke columns and executives in the table guide.
  • the table guide may preferably be a linear guide, in particular on both sides of the molding tool.
  • disk-shaped or rod-shaped elements for the table guide can be provided on the upper yoke and on the lower yoke.
  • the table guides for the upper table and for the lower table can preferably be designed identically, either integrally connected to the upper yoke or lower yoke or releasably secured there. This also increases the ease of maintenance and reduces the necessary inventory for maintenance.
  • Motors can be used as drive units. In particular, it is intended to electric motors with a vertical axis in the installed state.
  • One or more drive units can be designed as a motor.
  • all drive units are designed as a motor.
  • a very advantageous constellation also results when a drive unit is made passive and is connected via a drive means to a motor arranged otherwise for driving the drive unit.
  • not all drive units are provided as independent motors; Rather, at least one drive unit is passively formed.
  • a "passive drive unit” is understood as meaning such a drive unit which has to be driven rearwardly via a drive means in order to act with its output on the actuating element.
  • the drive means are in particular belts or chains into consideration.
  • a motor is connected via a belt or chain drive with one or more passive drive units, wherein the. passive drive units are arranged directly on the machine frame, specifically at the thermoforming station, so that the passive drive units act on their output to the actuators.
  • a motor and passive drive units driven by it may be made to rotate in the same direction with respect to their engine or drive unit rotational sense.
  • all motors and all passive drive units of the same thermoforming station have a same direction of rotation.
  • thermoforming station It is understood that the above features and their advantages can be found either individually or cumulatively on a thermoforming station.
  • thermoforming station has an immediate effect on the entire multi-station thermoforming system for processing transparencies or sheets.
  • thermoforming station be used as described above for producing intermediates or finished articles from films or sheets on a thermoforming machine.
  • advantageous properties of the thermoforming system itself extend to an article made therewith. In the long term, this can be produced more precisely than with conventional systems.
  • FIG. 3 shows an alternative arrangement to FIG. 1 in a view
  • FIG. 4 shows the alternative arrangement from FIG. 3 in plan view
  • FIG. 5 shows a schematic top view of a first motor arrangement
  • FIG. 5a shows the first motor arrangement from FIG. 5 in a view
  • FIG. 6 is a schematic plan view of a second motor arrangement
  • FIG. 7 is a schematic plan view of a third motor arrangement
  • FIG. 8 is a schematic view of a thermoforming station with a staggered lifting table
  • FIG. 9 shows the thermoforming station from FIG. 8 with deflected upper table and undeflected lower table, FIG.
  • FIG. 10 shows, in a schematic partial view, an upper yoke supported on a top yoke with an upper table arranged thereon, driven into a closed position, and with a spring assembly
  • Figure 11 is a schematic plan view of a fourth engine assembly
  • FIG. 12 shows the fourth motor arrangement from FIG. 11 in a view.
  • a drive 1 for a lower table of a thermoforming station consists essentially of a first motor 2, a second motor 3, associated transmission housings 4 (identified by way of example), a lower yoke 5 and a first toggle lever 6 and a second toggle lever 7 , With reference to a machine direction 8 (cf. FIG. 2), the two motors 2, 3 are arranged point-symmetrically about a center of the thermoforming station.
  • the first motor 2 drives a first eccentric shaft 9.
  • the second motor 3 drives a second eccentric shaft 10.
  • the total of four toggle levers 6, 7 are moved up and down with respect to a stroke direction 11, that is to say along the vertical.
  • the two motors 2, 3 run with a first drive rotation 12 or with a second drive rotation 13.
  • Both drive rotational direction 12, 13 are the same orientation, ie in the plan view of Hubrichrung 11 in the clockwise direction.
  • the driven eccentric shafts 9, 10 run simultaneously with a first actuating element rotational direction 14 and a second actuating element rotational direction 15. In the horizontal direction according to FIG. 1, these two actuating element rotational channels 14, 15 are oriented oppositely.
  • the first actuator rotation direction 14 runs counterclockwise.
  • the second Betreli noticedselementwindsinn 15 runs in a clockwise direction.
  • the two motors 2, 3 are arranged vertically. Conventional motors can be used. The direction of rotation is identical. This allows a very light construction of the system.
  • the alternative drive 16 in FIGS. 3 and 4 differs from the drive I described first only in that two motors 17, 18 both run counterclockwise in plan view, ie exactly the opposite to the two motors 2, 3 on the first drive 1.
  • the eccentric shafts and toggle arms run exactly as in the first drive from FIGS. 1 and 2 via correspondingly redesigned transmissions.
  • the first motor arrangement 19 in FIGS. 5 and 5 a shows, just like the second motor arrangement 20 and the third motor arrangement 21, by way of example a top yoke 22 for driving an upper table 23.
  • both motors 24, 25 are located on one side adjacent to the two toggle lever drives.
  • the two motors 24, 25 are diagonally opposite each other, each on one side of the two toggle lever drives.
  • the motor gear unit can be moved arbitrarily along the eccentric axes. This allows a high degree of design freedom in the drives.
  • the motors are driven, for example, via an electric shaft, in which the motors are coupled via a common master.
  • thermoforming station is symmetrical between top and bottom. In particular, mirror-inverted or rotated by 180 ° arrangements crowd.
  • the thermoforming station 26 in FIGS. 8 and 9 initially has a lower yoke 28 on a floor 27. On this four Oberjoch skin 29 (identified by way of example) are arranged, which extend vertically upwards and at its upper end a Oberjoch 30 support.
  • toggle lever drives 31 there are a total of four toggle lever drives 31 (identified by way of example). If these are set in rotation, for example by a motor, gear and eccentric shaft arrangement as shown in FIGS. 1 to 7a, then a lower table 32 rises and falls.
  • the lower table 32 and the upper table 33 are mounted on a lower table guide 34 and an upper table guide 35 vertically longitudinally displaceable. Both the lower table guide 34 and the upper table guide 35 each have guide elements, "for example, rails which are fastened or supported or guided on the lower yoke 22 and on the upper yoke 33.
  • the lower table guide 34 and the upper table guide 35 serve as a linear guide for the two tables.
  • the undertable 32 and the top table 33 are staggering.
  • a linear rotary unit 36 (indicated by way of example) is provided.
  • the two tables are movable along a wobble play degree of freedom 38 (identified by way of example), so that the tables can assume an angle 40 relative to a perpendicular to the stroke direction 39, that is to say the vertical.
  • both the lower table 32 and the upper table 33 always move along their axes of symmetry and can rotate about their own axis on this center line. At the same time errors and tolerances in the toggle lever drives 31 are compensated.
  • high vertical forces are exerted on the top table 41 by the press. These are transmitted via a knee lever 42 on the upper yoke 43. This is connected via the Oberjoch 100 44 with an anchorage 45, which may for example be a lower yoke.
  • the spring pack 46 becomes a compressed spring pack 46 precisely when an excessive force 49 acts vertically upward on the upper stage 41. Because this force is also on the toggle 42 on the Oberjoch 43 transferred. The upward force is thus greater than the biasing force from the spring assembly 46.
  • the spring assembly 46 then upsets, with increasing spring travel 50, the vertically downwardly acting spring force of the compressed spring assembly 48 increases linearly. As a result, the spring assembly 46 so only to a sprained spring assembly 48, but it will not penetrate out of the elastic range addition.
  • the upper support 44 preferably does not assume any guiding function of the table support, but leaves this to a separately provided table guide.
  • the motors may also be replaced by other drive elements.
  • it is intended to passive drive elements, which are driven by one or more otherwise arranged motors together or individually and abort in turn to transmissions or directly to actuators.
  • the fourth motor arrangement 51 in FIGS. 11 and 12 differs from the previous motor arrangements in particular in that two passive drive elements 52, 53 and an active motor 54 are provided at the thermoforming station.
  • the two passive drive elements 52, 53 are each formed with a vertical axis of rotation as a rotatable round body and each arranged on an eccentric shaft 55 (exemplified) and connected to this via a gear 56 (exemplified) connected.
  • the motor has a round drive body 57 in the form of a disc with a vertical axis of rotation.
  • the two passive drive elements 52, 53 each have a round rotary body 58, 59.
  • the two Rotati onsêt 58, 59 also have a vertical axis of rotation. They are connected to the drive body 57 via a drive belt 60.
  • the drive belt 60 also runs between the motor 54 and the two passive drive elements 52, 53 via two deflection rollers 61 (identified by way of example), which likewise have a vertical axis.
  • the rotating motor 54 ensures that the two passive drive elements 52, 53 exert rectified acceleration and braking torques on the thermoforming station. These even add up to the drive and braking torques of the motor 54, if such is connected to the same machine frame of the thermoforming station.
  • the synchronous driving directions of rotation of the passive drive elements 52, 53 are translated into opposite rotations of the eccentric shafts 55. The moments of the eccentric shafts 55 cancel each other out.
  • the motor 54 is arranged on the central axis of the thermoforming station in the example shown. It is understood, however, that the engine can be arranged completely freely. In particular, it is even possible to drive with an engine, the passive drive elements of several stations on the thermoforming system, especially when clutches are provided, the acceleration and braking torques when coupling and decoupling and are problematic for the product quality, because the moments of the actuators cancel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un poste de thermoformage. Selon l'invention, des moteurs sont orientés de manière à tourner dans le même sens sur l'entraînement de la table supérieure et de la table inférieure, tandis que des éléments d'actionnement sont orientés de manière à tourner en sens contraire. Par ailleurs, un système de montage de table oscillant est décrit. Un système de guidage de table séparé des supports de cadre supérieur est en outre présenté. Des blocs-ressorts destinés à recevoir des supports de surcharge sont également proposés. Le poste de thermoformage selon l'invention présente dans l'ensemble une fiabilité de fonctionnement accrue et une grande facilité de maintenance.
PCT/DE2011/000369 2010-06-07 2011-04-07 Poste de thermoformage, installation de thermoformage, procédé de formage ou d'estampage et articles fabriqués par ce procédé WO2011153975A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US13/702,764 US20130152660A1 (en) 2010-06-07 2011-04-07 Thermoforming station, thermoforming system, method for forming or stamping articles produced
EP11733552.1A EP2576186A2 (fr) 2010-06-07 2011-04-07 Poste de thermoformage, installation de thermoformage, procédé de formage ou d'estampage et articles fabriqués par ce procédé
DE112011101935T DE112011101935A5 (de) 2010-06-07 2011-04-07 Thermoformstation, Thermoformanlage, Verfahren zum Formen oder Stanzen sowie hergestellte Artikel

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ES2721913T3 (es) * 2014-04-16 2019-08-06 Voestalpine Automotive Components Dettingen Gmbh & Co Kg Procedimiento y dispositivo para producir un núcleo de láminas de chapa pegadas
US10245796B2 (en) * 2016-07-25 2019-04-02 The Goodyear Tire & Rubber Company Center deck assembly for tire building drum
DE102017123805A1 (de) * 2017-10-12 2019-04-18 Weber Maschinenbau Gmbh Breidenbach Arbeitsstation mit Hubmechanismus für eine Verpackungsmaschine
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US20130152660A1 (en) 2013-06-20
EP2576186A2 (fr) 2013-04-10
DE102010054976A1 (de) 2011-12-08
DE112011101935A5 (de) 2013-05-23
WO2011153975A3 (fr) 2012-06-07

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