Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B9/00—Blowing glass; Production of hollow glass articles
  • C03B9/30—Details of blowing glass; Use of materials for the moulds
  • C03B9/44—Means for discharging combined with glass-blowing machines, e.g. take-outs
  • C03B9/453—Means for pushing newly formed glass articles onto a conveyor, e.g. sweep-out mechanisms; Dead-plate mechanisms

Definitions

• the invention relates to a pusher mechanism for a glass forming machine comprising a rotational driving unit installed on a frame and interconnected with a driving shaft on which a linear driving unit is fixed that is connected to the shifting member.
• the pusher mechanism of the glasswork forming machine is used for the transportation of a formed glass product or a group of products from a fixed dead plate of the glasswork forming machine to a moving conveyor.
• the required movements of the mechanism depend on the number of sections and the manufacturing velocity of the line forming machine, on the dimensions and the final position of products on the conveyor.
• Another disadvantage is the fact that clearances in the mechanism in the event of alterations of the direction of the movement cause an uneven operation of the shifting member having an adverse impact upon the stability of the shifted products.
• Another deficiency of such embodiments is their lack of ability to get adjusted to the alteration of the mode of operation of the forming machine for instance when operated with a lowered number of operated sections.
• Czech patent CZ 288 848 describes a pusher mechanism of a glasswork forming machine comprising a drive with a first driving unit and a second driving unit mounted on a base plate in a way that their output shafts are parallel.
• the output shaft of the first driving unit is connected by a first transmission mechanism with a hnllnu/ shaft ha_inn a SW ⁇ V ⁇ ! -SeatlP.O in th ⁇ hasfi nlate.
• T fi oiitnut shaft of thp second driving unit passes through the centre of the hollow shaft.
• the hollow shaft supports a parallelogram comprising a carrier, at least two cranks and a shifting member. At least two swivel pins are pivotally attached to the carrier.
• the pins are interconnected by a second transmission mechanism with the output shaft of the second driving unit. Every such a pin supports a crank, pivotally attached to the shifting member.
• a disadvantage of this design is the high requirement for the control of the resulting movement of the shifting member due to the composition of two rotational movements and high spatial requirements, mainly in the space under the level of the dead plate.
• Solution according to US 5 160 015 or EP 0531899A1 deals with the transfer of products from part of the working stations to one conveyor belt and from the remaining part of the working stations to another conveyor belt.
• a disadvantage of this solution is the need to have two different mechanisms for the first as well as the other belt, a non-standard design of the belt and other technological devices in the line.
• US 5429 651 also uses a known version with a pneumatic cylinder on a rotational element that is installed on another moving line turned to the axis of the belt in an angle facilitating the transferring stage of the activity.
• the aim of the invention is to carry out such structural modifications to the known pusher mechanism of a glass forming machine with a pneumatic cylinder that would allow to set the path and speed of the shifting member in a simple way.
• a pusher mechanism for a gas forming machine that comprises a rotational driving unit installed on a frame and interconnected with a rotational shaft on which a linear driving unit is installed that is connected with the shifting member, according to the invention, the principle of which is that the linear driving unit comprises a linear electric motor.
• the advantage of the pusher mechanism for a gas forming machine according to the invention is that it allows you to easily control the direction of movement and course of the speed of both the rotational driving unit and the linear driving unit, which means that you can principally set any course of movement for the shifting member that transfers products from the dead plate to the moving belt of a conveyor. By selecting the speed of the linear and rotational movement you can adapt the activity of the pusher mechanism to the particular transferred product and the character of production.
• Another advantage of the pusher mechanism for a gas forming machine based on the invention is mainly its simplicity, a small number of components in the set, low production requirements, a high proportion of standardized parts and small installation dimensions.
• the linear electric motor is installed on the rotational shaft in a holder through which at least two guiding bars pass in a sliding way while the linear electric motor is interconnected with the shifting member by an output rod.
• the shifting member is equipped with one of the known suctioning systems for products, it is beneficial to make at least one of the guiding bars hollow to enable supply of pressurized air for the shifting member.
• the linear electric motor and the rotational driving unit are interconnected with an electronic control unit while the rotational driving unit comprises of an electric motor.
• a sensor for the position of the shifting member is connected to the electronic control unit and there is another sensor that measures the position of the rotational driving unit that is also connected to the electronic control unit.
• the electronic control unit comprises a PC and it can be equipped with a user interface for data input.
• the user interface may comprises e.g. of a keyboard or a CD or floppy-disk drive.
• fig. 1 schematically represents an embodiment of the pusher mechanism according to the invention that is fixed to a frame and connected to an electronic control unit.
• Fig. 2 presents the same mechanism without the electronic control unit.
• Figs. 3 through 5 present the same pusher mechanism shown in different views.
• Figs. 6 through 10 show this mechanism in various working stages.
• Figs 1 and 2 show the pusher mechanism 10 for a glass forming machine that is fixed to a frame, in this case to the frame 15 of a conveyor 14 of a glass forming machine that is not shown here.
• a holder 32 is attached to the frame 15 of the conveyor 14 by an adaptor 33.
• the rotational driving unit 31 comprises of an electric motor in this case, but experts are aware that any available rotational motor can be used.
• Each dead plate 13 of the glass forming machine has its own pusher mechanism 10.
• Figs. 3, 4 and 5 present the same pusher mechanism 10 for a glass forming machine shown in various views without the frame 15 of the conveyor.
• the rotational driving unit 31 is connected with the gearbox 30 and via the shaft coupling 29 it is also connected to the rotational shaft 27 fixed in the holder 32 of the rotational driving unit 31 with the use of bearings 28.
• the linear driving unit is installed on the rotational shaft 27 in the holder 23.
• the unit comprises of a synchronous linear electric motor 40 of the tubular type with permanent magnets.
• a synchronous linear electric motor 40 of the tubular type with permanent magnets.
• the linear electric motor 40 has a stator 24 in which an output rod 25 with linear movement is installed.
• the linear electric motor 40 is connected to the shifting member 11 by the output rod 25 via a joint coupling 26 and an adaptor 20.
• guiding bushings 22 In the holder 23 of the linear electric motor 40, parallel to the axis of the linear electric motor 40, there are two guiding bushings 22 in which two guiding bars 21 are installed in a sliding way that are connected to the shifting member 11 via the adapter 20.
• the guiding bars 21 prevent the transfer of undesired forces to the output rod 25 of the linear electric motor 40. To ensure proper guiding there must be at least two guiding bars 21.
• the particular shape of the shifting member 11 depends on the shape of the products, e.g. bottles 12 and on the character of the production, but this solution does not deal with this issue and this is why it will not be described in a detailed way.
• the shifting member 11 is equipped with one of the known product suctioning system, it is beneficial if one of the guiding bars 21 is produced as hollow one and the supply of pressurized air 60 passes through it to the shifting member 11 (see fig. 5).
• the passage 61 of the pressurized air from the guiding bar 21 to the shifting member 11 is sealed with a gasket 39.
• the linear electric motor 40 is provided with a cover 35 that protects the linear electric motor 40 and the guiding bars 21 from influences of the external environment, mainly from influences of the temperature and dirt.
• Figs. 3 and 4 show that the linear electric motor 40 is provided with the first sensor 36 used to monitor the reference position of sliding of the output rod 25 and the position of the shifting member 11 consequently.
• the sensor 36 is attached to the holder 23 of the linear electric motor 40.
• the adaptor 20 of the shifting member 11 can advantageously be used as an activator of the sensor.
• the first sensor 36 is fixed in an adjustable way.
• Figs. 3 and 4 also show that the rotational driving unit 31 is provided with a second sensor 37 with a corresponding activator 38 for sensing of the reference position of turning.
• the second sensor 37 is attached to the holder 32 of the rotational driving unit 31 and the activator 38 is connected to the rotational shaft 27 or to the shaft coupling 29.
• the activator 38 is fixed in an adjustable way.
• activator 38 generally means an element that activates the sensor 36, 37 after approaching the sensor so that the sensor 36, 37 sends a signal to an electronic control unit 71 that will be described below.
• any known sensor can be used as the sensors 36, 37, especially inductive sensors, mechanical sensors, optical sensors, capacity sensors and other units.
• the type of the chose activator 38 depends on the type of the used sensor 36, 37.
• the activator consists of ferromagnetic material.
• the activator comprises a mechanical stop.
• optical sensors the activator is represented by a change of colour or optical properties of the sensed object.
• capacity sensors the activator comprises of an element the capacity of which differs from the capacity of the surroundings.
• the activator 38 is set in such a way that the reference point of turning of the rotational driving unit 31 obtained this way is identical to the initial position of turning of the holder 23 of the linear electric motor 1 and at the same time the first sensor 36 is set in such a way that the reference point of sliding of the shifting member 11 obtained this way is identical to the initial position of this shifting member 11 as shown in fig. 6.
• the particular initial positions of the pusher mechanism 10 are selected with regard to the type of transferred product and character of production.
• the linear electric motor 40 and the rotational driving unit 31 are connected via power amplifiers 72 with an electronic control unit 71 that controls the speed and direction of movement of the rotational driving unit 31 and the linear electric motor 40.
• the electronic control unit 71 can be represented by a microprocessor, PC or programmable logical automatic device, etc.
• the electronic control unit 71 in the described embodiment is a PC with a user interface 70 for input of data rendering information about the required speed and direction of movement of the rotational driving unit 31 and the linear electric motor 40.
• the user interface 70 is a PC keyboard and a PC CD drive.
• Each pusher mechanism of the glass forming machine of the described type has its own rotational driving unit 31 and linear electric motor 40. Experts would find it obvious that a lot of pusher mechanisms may be connected to one programmable electronic control unit 71 which is schematically represented with other power amplifiers 72 in fig. 1.
• the pusher mechanism 10 for a glass forming machine transfers formed glass products, e.g. bottles 12, from fixed dead plates 13 of individual sections of a line glass forming machine to a common moving conveyor belt 14 that transports products to the next working stations.
• Each section of a line glass forming machine has its own dead plate 13 with a pusher mechanism 10.
• the course of the speed and direction of movement of the rotational driving unit 31 and the linear electric motor 40 can be programmed at any time and so the operation of the pusher mechanism 10 of the glass forming machine can be adapted to particular conditions this way.
• Data characterizing the required course of the speed and direction of movement is entered in the electronic control unit 71 via the user interface 70.
• the data will be entered by inserting respective CD to the CD drive.
• the data are read to the memory of the programmable electronic control unit 28.
• a number of options may be stored on the CD. Every of them is optimised for specific range of products manufactured in the glasswork forming machine.
• Figs. 2, 3 and 4 show that the output rod 25 of the linear electric motor 40 moves in a linear returning way marked with the reference sign 52 during the operation while the shaft 27 together with the connected holder 23 of the linear electric motor 40 turns in the direction indicated with the reference sign 53.
• a combination of these two movements forms the resulting movement for the shifting member 11 that is shown in figs. 6 to 10.
• Fig. 6 shows the pusher mechanism 10 in the initial - reference - resting position.
• the bottles 12 are laid on the dead plates 13, the conveyor belt 14 moves in the direction of the arrow 51.
• the linear electric motor 40 moves the shifting member 11 (see fig. 7) in the direction of the arrow 54 in such a way that the bottles 12 are grasped.
• Fig. 9 represents the moment when the shifting member 11 due to the composition of the movement from the linear electric motor 40 and the rotational driving unit 31 moves in the direction of the arrow 56, which is the same as the direction of the arrow 51 indicating the direction of the movement of the conveyor belt 14.
• the relative speed of the shifting member 11 and the bottles 12 is equal to the speed of the movement of the conveyor belt 14 at this moment.
• the shifting member 11 is quickly slid in the direction of the arrow 57 as fig. 10 shows.
• the bottles 12 are transferred to the conveyor belt 14.
• the bottles 12 only move in the direction 56, which is equal to the direction 51 of movement of the conveyor belt 14 with the same speed, so they are carried by the conveyor belt 14.
• the shifting member 11 starts to move in a rotational way 58.
• the pusher mechanism 10 returns with a movement composed of the rotational movement in the direction 58 and the linear movement in the direction 57 to the initial - reference position as shown in fig. 6 and fig. 1.
• the shifting member 11 may be shaped with regard to individually produced glass products, etc.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
• Special Conveying (AREA)

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• 2004
  • 2004-06-18 CZ CZ2004743A patent/CZ295688B6/cs not_active IP Right Cessation
• 2005
  • 2005-05-30 WO PCT/CZ2005/000043 patent/WO2005123615A1/en not_active Application Discontinuation
  • 2005-05-30 EP EP05744689A patent/EP1761467A1/en not_active Withdrawn
  • 2005-05-30 EA EA200602063A patent/EA009143B1/ru not_active IP Right Cessation

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