WO2021084359A1 - Portable device for changing screen holders of polymer filters in pelletisers - Google Patents

Portable device for changing screen holders of polymer filters in pelletisers Download PDF

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Publication number
WO2021084359A1
WO2021084359A1 PCT/IB2020/059618 IB2020059618W WO2021084359A1 WO 2021084359 A1 WO2021084359 A1 WO 2021084359A1 IB 2020059618 W IB2020059618 W IB 2020059618W WO 2021084359 A1 WO2021084359 A1 WO 2021084359A1
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WO
WIPO (PCT)
Prior art keywords
portable device
holders
polymer filter
filter mesh
changing polymer
Prior art date
Application number
PCT/IB2020/059618
Other languages
Spanish (es)
French (fr)
Inventor
Fernando VILLARREAL POSADA
Original Assignee
Esenttia S.A.
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 Esenttia S.A. filed Critical Esenttia S.A.
Publication of WO2021084359A1 publication Critical patent/WO2021084359A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B9/00—Automatic or semi-automatic turning-machines with a plurality of working-spindles, e.g. automatic multiple-spindle machines with spindles arranged in a drum carrier able to be moved into predetermined positions; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/27—Cleaning; Purging; Avoiding contamination
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/69—Filters or screens for the moulding material
    • B29C48/691—Arrangements for replacing filters, e.g. with two parallel filters for alternate use

Definitions

  • the present invention is framed in the field of polymer industry and manufacturing, mainly with devices that lighten and facilitate the change of polymer filter mesh holders in polymer pelletizing machines.
  • the present invention deals with a carriage-type device that is an effective tool for changing mesh holders in filters for pelletizing machines, wherein the device (A) comprises a cradle (1), a sliding table (2) in charge of carry out fine horizontal movements, a base (3) and a transport rolling lifting platform (4) which in turn allows vertical movements of the device of the invention.
  • the device (A) comprises a cradle (1), a sliding table (2) in charge of carry out fine horizontal movements, a base (3) and a transport rolling lifting platform (4) which in turn allows vertical movements of the device of the invention.
  • Efforts are made in the state of the art in order to be able to achieve improved conditions of safety and efficiency in this process, such is the case of patent CN106738782 which refers to a filter mesh change device fully automatic for a granulation extruder, which comprises: a fixed frame, a sliding plate, a filter frame, a pressure gauge or manometer, an electric control unit and a hydraulic mechanism, wherein the frame is fixed in section cross section between the extrusion screw and the machine head.
  • the slide plate is slidably fixed on the fixing frame by connecting to the hydraulic mechanism through a piston.
  • the filter frame is embedded and fixed in the slide plate, two or more filter nets are arranged in parallel, and one side of the slide plate that is in contact with the extrusion screw and is provided with an elliptical slide groove, and both ends of the slide channel open and pass through the filters.
  • Document CN203305499 refers to a device for quick change of filters of an extruder, which is composed of a cavity, a filter mesh plate, a sealing ring and a hydraulic component, in where the cavity is integrated and its upper and lower sides are provided with an oblong through hole and a passage for through said hole.
  • the upper end of the filter mesh plate is fixedly connected with the hydraulic component and the lower end passes through the oblong hole in the cavity.
  • the sealing ring is in turn comprised of three rings, which are a fitting sealing ring, a domed sealing ring and a common sealing ring.
  • the adjusting sealing ring is screwed with the cavity and is arranged at one end of the feed port, and a plurality of adjusting grooves are formed in the outer wall.
  • the adjustment slot is adapted to the adjustment tool that is positioned in the sealing ring to facilitate left and right rotation.
  • the cavity also has a built-in heating rod, and an external junction box is attached to maintain the melt temperature of the flow channel.
  • the device (A) allows the receiver cradle (1) to be positioned quickly and precisely aligned against the filter hole of the mesh holder (B) to be changed, using an extractor tool (5) consisting of a pneumatic cylinder (5.1) and a pusher plate (5.2) remove the mesh holder (B), which weighs approximately 120 kg, and places it safely on the receiving cradle (1) of the device (A) of the invention.
  • an extractor tool (5) consisting of a pneumatic cylinder (5.1) and a pusher plate (5.2) remove the mesh holder (B), which weighs approximately 120 kg, and places it safely on the receiving cradle (1) of the device (A) of the invention.
  • the operator does not need to touch the mesh holder (B), thus avoiding possible burns, nor does he have to exert muscular effort to manipulate it, since that is what the hydraulic system is for that raises and lowers it from its position.
  • This device (A) is also used to install the clean mesh holders (B) to be installed by doing the opposite procedure to that explained above.
  • Figure 1 shows a perspective view of the device (A) according to the present invention.
  • Figure 2 shows an exploded view of the device (A) showing all its components.
  • a carriage-type device (A) for changing mesh holders (B) which has a receiving cradle (1) for the mesh holders (B), a sliding table (2), a base (3) and a rolling hydraulic lifting platform (4).
  • figure 1 shows a perspective view of the device (A) of the invention, where the receiving cradle (1), the sliding table (2) can be seen which is in charge of making the fine horizontal movements so that the receiving cradle (1) is exactly aligned with the mesh holder (B) that is removed from the pelletizing machine, while the rolling lifting platform (4) is in charge of the transportation and gross accommodation of the device of the invention.
  • the receiver cradle (1) has two safety bars (1.1) that are placed once the mesh holder has been removed and prevent it from falling. At the bottom of the receiver cradle (1), it has a vertical threaded rod (1.2) with a threaded handwheel (1.3) that allows fine adjustment to the height of the receiver cradle (1) when aligning with the hole of the mesh holder block (C).
  • the receiving cradle (1) and the vertical threaded bar (1.2) are supported on a sliding table (2) which has the function of locating the receiving cradle (1) in a horizontal direction when required to align it with the hole in the mesh holder block (C).
  • the sliding table (2) has in its lower part two cylindrical horizontal guides (2.3) that slide inside lubricated bushings (2.4) located on a support plate (2.7). At the lower ends of the table, there are four (4) hooks (2.8), two on each side, that secure the sliding table (2) against the frame of the Mesh Holder Block (C).
  • the sliding table (2) moves millimetrically horizontally through a threaded bar (2.2) that has a handwheel (2.1) at one of its ends and is screwed into a fixed nut (2.6) that is above one of the bushings (2.4) and that have the sliding table assembly (2) welded to the support plate (2.7).
  • This support plate (2.7) has four wheels (2.5) that allow the sliding table (2) to be moved back and forth to position the hooks (2.8) in the frame of the mesh holder block (C) when the hydraulic table is being raised ( 4).
  • Both the receiving cradle (1) and the sliding table assembly (2) are mounted on a base (3) that has guides (3.1) through which the slides slide. wheels (2.5) from the support plate (2.7). At the end of the guides (3.1) there are stops (3.2) that prevent the wheels (2.5) from coming off the guides (3.1).
  • the base plate (3) is fixed to the hydraulic lifting table (4) by means of four bolts (3.3).
  • the hydraulic lift table (4) has the capacity to lift a maximum of one ton and is of standard construction.
  • the mesh holder (B) is extracted from the hole of the mesh holder block (C) by means of an extractor tool (5) that is also part of the invention, which has at the end of the piston rod a Pusher Plate (5.2) that is adapts to the diameter of the mesh holder (B).
  • an extractor tool (5) that is also part of the invention, which has at the end of the piston rod a Pusher Plate (5.2) that is adapts to the diameter of the mesh holder (B).
  • air is injected into the body (5.1) of the extractor tool (5) to extract the mesh holder (B) to be changed and deposit it on the receiving cradle (1) of the device (A) according to the invention.
  • the mesh holder (B) is secured by means of the safety bars (1.1) provided by the receiver cradle (1) and the hydraulic table (4) is lowered completely and then it is taken in the same mesh holder device to the workshop for maintenance.
  • This device (A) also allows the mesh holder (B) to be re-installed in the mesh holder block (C), once the maintenance has been carried out by doing the opposite procedure to that explained above.
  • the rolling hydraulic lifting table (4) comprises an upper surface (4.1) where the receiving cradle (1), the sliding table (2) and the base (3) rests and can comprise a lifting system (4.2) which can be a system of posts in resistant material, for example, iron, steel etc, two on each side as shown in figure 2 and pivotally joined together through a through bolt.
  • the entire lifting system (4.2) is mounted on a base (4.4) that has wheels (4.5).
  • the lower ends of the lifting system (4.2) may in turn have a rolling or displacement system (not shown) that allows its easy movement through guides in the base (4.4) when the height of the the rolling hydraulic lifting table (4).
  • the lifting system (4.2) can be actuated by a hydraulic piston (4.3) as shown in figure 2, mechanically or electrically.
  • the lifting system (4.2) can be a system of bars that make up an accordion which could be raised or lowered also by an electrically driven piston type system or with a through bar system with pinion to lower or raise it manually.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Portable device for changing screen holders of polymer filters in pelletisers. The present invention relates to a trolley-type device that is an efficient tool for changing screen holders in filters for pelletising machines, wherein the device (A) comprises a cradle (1), a sliding table (2) responsible for performing the fine horizontal movements, a base (3) and a wheeled lifting transport platform (4) which in turn allows the device of the invention to be moved vertically.

Description

i i
DISPOSITIVO PORTATIL PARA CAMBIAR PORTAMALLAS DE LOS FILTROS DE POLÍMEROS EN PELETIZADORAS CAMPO TÉCNICO PORTABLE DEVICE TO CHANGE SCREEN HOLDERS OF POLYMER FILTERS IN PEELING MACHINES TECHNICAL FIELD
[001] La presente invención se encuentra enmarcada en el campo de la industria y fabricación de polímeros, principalmente con dispositivos que aligeran y facilitan el cambio de portamallas de filtros de polímero en máquinas peletizadoras de polímero. [001] The present invention is framed in the field of polymer industry and manufacturing, mainly with devices that lighten and facilitate the change of polymer filter mesh holders in polymer pelletizing machines.
RESUMEN RESUME
[002] La presente invención trata de un dispositivo tipo carro que es una herramienta eficaz para el cambio de portamallas en filtros para máquinas peletizadoras, en donde el dispositivo (A) comprende una cuna (1), una mesa deslizante (2) encargada de realizar los movimientos horizontales finos, una base (3) y una plataforma elevadora rodante (4) de transporte que a su vez permite realizar movimientos verticales del dispositivo de la invención. [002] The present invention deals with a carriage-type device that is an effective tool for changing mesh holders in filters for pelletizing machines, wherein the device (A) comprises a cradle (1), a sliding table (2) in charge of carry out fine horizontal movements, a base (3) and a transport rolling lifting platform (4) which in turn allows vertical movements of the device of the invention.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
[003] En la industria de fabricación de polímeros, se requiere de equipos de grandes dimensiones que trabajan a altas temperaturas. El mantenimiento y reemplazo de piezas de gran tamaño y peso, como es el caso del portamallas que además de sus dimensiones, se encuentran a temperaturas que oscilan entre 200°C y 300°C y requieren de la manipulación de operarios entrenados que se ven expuestos a riesgos de quemaduras y sobre-esfuerzos musculares máxime cuando se requiere manipular los portamallas del filtro con la máquina en operación y hacer el cambio de mallas en el menor tiempo posible. [003] In the polymer manufacturing industry, large equipment is required that works at high temperatures. The maintenance and replacement of large and heavy parts, such as the mesh holder, which in addition to its dimensions, are at temperatures ranging between 200 ° C and 300 ° C and require the handling of trained operators who are exposed. to risks of burns and muscular over-exertion, especially when it is necessary to manipulate the filter mesh holders with the machine in operation and change the mesh in the shortest possible time.
[004] Se hacen esfuerzos en el estado del arte a fin de poder lograr condiciones mejoradas de seguridad y eficiencia en este proceso, tal es el caso de la patente CN106738782 que hace referencia a un dispositivo de cambio de malla de filtro completamente automático para una extrusora de granulación, el cual comprende: un bastidor fijo, una placa deslizante, un bastidor de filtro, un medidor de presión o manómetro, una unidad de control eléctrica y un mecanismo hidráulico, en donde el bastidor se fija en sección transversal entre el tornillo de extrusión y la cabeza de la máquina. La placa deslizante se fija de manera deslizante en el marco de fijación conectándose al mecanismo hidráulico a través de un pistón. El marco del filtro está incrustado y fijado en la placa deslizante, dos o más redes de filtros están dispuestas en paralelo, y un lado de la placa deslizante que está en contacto con el tornillo de extrusión y está provisto de una ranura deslizante elíptica, y ambos extremos del canal deslizante se abren y pasan a través de los filtros. [004] Efforts are made in the state of the art in order to be able to achieve improved conditions of safety and efficiency in this process, such is the case of patent CN106738782 which refers to a filter mesh change device fully automatic for a granulation extruder, which comprises: a fixed frame, a sliding plate, a filter frame, a pressure gauge or manometer, an electric control unit and a hydraulic mechanism, wherein the frame is fixed in section cross section between the extrusion screw and the machine head. The slide plate is slidably fixed on the fixing frame by connecting to the hydraulic mechanism through a piston. The filter frame is embedded and fixed in the slide plate, two or more filter nets are arranged in parallel, and one side of the slide plate that is in contact with the extrusion screw and is provided with an elliptical slide groove, and both ends of the slide channel open and pass through the filters.
[005] También se conoce el documento CN203305499 el cual hace referencia a un dispositivo de cambio rápido de filtros de un extrusor, el cual está compuesto por una cavidad, una placa de malla de filtro, un anillo de sellado y un componente hidráulico, en donde la cavidad se encuentra integrada y sus lados superior e inferior están provistos de un orificio pasante oblongo y un pasaje para pasante a través de dicho orificio. El extremo superior de la placa de malla de filtro está conectado de manera fija con el componente hidráulico y el extremo inferior pasa a través del orificio oblongo de la cavidad. El anillo de sellado está comprendido a su vez de tres anillos, que son un anillo de sellado de ajuste, un anillo de sellado en forma de cúpula y un anillo de sellado común. El anillo de sellado de ajuste se atornilla con la cavidad y está dispuesto en un extremo del puerto de alimentación, y una pluralidad de ranuras de ajuste se forman en la pared exterior. La ranura de ajuste está adaptada a la herramienta de ajuste que está posicionada en el anillo de sellado para facilitar la rotación hacia la izquierda y hacia la derecha. La cavidad también tiene una varilla de calentamiento incorporada, y una caja de conexiones externa está unida para mantener la temperatura de fusión del canal de flujo. Este sistema es muy similar al sistema del documento anterior, pero se diferencia en que para la patente esta invención es un sistema vertical en donde se desplaza longitudinalmente el sistema que puede comprender dos filtros a fin de reemplazar un por el otro. Al igual que el documento CN106738782, esta invención falla en solucionar el problema de descargar totalmente los filtros para su posterior mantenimiento sin que se haga un sobre esfuerzo y una exposición a quemaduras por parte del operario. [006] En este orden de ¡deas, es evidente que en el estado de la técnica persiste la necesidad de un dispositivo versátil, portátil de fácil manejo e independiente de la máquina de proceso, que permita de una manera rápida, eficiente y segura, extraer el filtro sucio y cambiarlo por un filtro limpio en máquinas peletizadoras para su mantenimiento de manera segura y rápida para no estar expuestos a la radiación de la máquina que está en operación. [005] Document CN203305499 is also known which refers to a device for quick change of filters of an extruder, which is composed of a cavity, a filter mesh plate, a sealing ring and a hydraulic component, in where the cavity is integrated and its upper and lower sides are provided with an oblong through hole and a passage for through said hole. The upper end of the filter mesh plate is fixedly connected with the hydraulic component and the lower end passes through the oblong hole in the cavity. The sealing ring is in turn comprised of three rings, which are a fitting sealing ring, a domed sealing ring and a common sealing ring. The adjusting sealing ring is screwed with the cavity and is arranged at one end of the feed port, and a plurality of adjusting grooves are formed in the outer wall. The adjustment slot is adapted to the adjustment tool that is positioned in the sealing ring to facilitate left and right rotation. The cavity also has a built-in heating rod, and an external junction box is attached to maintain the melt temperature of the flow channel. This system is very similar to the system of the previous document, but it differs in that for the patent this invention is a vertical system where the system is longitudinally displaced, which can comprise two filters in order to replace one with the other. Like the document CN106738782, this invention fails to solve the problem of completely unloading the filters for their subsequent maintenance without overexertion and exposure to burns by the operator. In this order of ideas, it is evident that in the state of the art the need persists for a versatile, portable device that is easy to use and independent of the process machine, which allows in a fast, efficient and safe way, remove the dirty filter and change it for a clean filter in pelletizing machines to maintain it safely and quickly so as not to be exposed to radiation from the machine that is in operation.
[007] El dispositivo (A) permite posicionar la cuna receptora (1 ) rápidamente y alinearla con precisión contra el agujero del filtro del portamallas (B) que se va a cambiar, utilizando una herramienta extractora (5) que consiste en un cilindro neumático (5.1 ) y un plato empujador (5.2) se extrae el portamallas (B), que pesa aproximadamente unos 120 Kgs, y lo deposita en forma segura sobre la cuna receptora (1 ) del dispositivo (A) de la invención. Una vez asegurado el portamallas (B) en la cuna receptora (1 ) mediante unas barras de seguro (1.1 ), se baja a nivel de piso mediante una mesa hidráulica rodante (4) donde está instalado el dispositivo y se traslada a un área alejada de la peletizadora donde se deja enfriar para luego hacerle su mantenimiento y el cambio de mallas. Con el dispositivo (A) el operario no requiere tocar el portamallas (B), evitando así posibles quemaduras, ni tampoco tiene que hacer esfuerzo muscular para manipularlo ya que para eso está el sistema hidráulico que lo sube y lo baja de su posición. Este dispositivo (A) también se utiliza para instalar los portamallas (B) limpios que se van a instalar haciendo el procedimiento contrario al explicado anteriormente. [007] The device (A) allows the receiver cradle (1) to be positioned quickly and precisely aligned against the filter hole of the mesh holder (B) to be changed, using an extractor tool (5) consisting of a pneumatic cylinder (5.1) and a pusher plate (5.2) remove the mesh holder (B), which weighs approximately 120 kg, and places it safely on the receiving cradle (1) of the device (A) of the invention. Once the mesh holder (B) has been secured in the receiving cradle (1) by means of safety bars (1.1), it is lowered to the floor level by means of a rolling hydraulic table (4) where the device is installed and it is moved to a remote area from the pelletizer where it is allowed to cool and then carry out its maintenance and change of screens. With the device (A) the operator does not need to touch the mesh holder (B), thus avoiding possible burns, nor does he have to exert muscular effort to manipulate it, since that is what the hydraulic system is for that raises and lowers it from its position. This device (A) is also used to install the clean mesh holders (B) to be installed by doing the opposite procedure to that explained above.
BREVE DESCRIPCIÓN DE LAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES
[008] La figura 1 muestra una vista en perspectiva del dispositivo (A) de acuerdo con la presente invención. [008] Figure 1 shows a perspective view of the device (A) according to the present invention.
[009] La figura 2 enseña una vista en explosión del dispositivo (A) mostrando todos sus componentes. Figure 2 shows an exploded view of the device (A) showing all its components.
BREVE DESCRIPCIÓN DE LA INVENCIÓN BRIEF DESCRIPTION OF THE INVENTION
[010] De acuerdo con la presente invención, se proporciona un dispositivo (A) tipo carro para cambio de portamallas (B), el cual tiene una cuna receptora (1 ) para los portamallas (B), una mesa deslizante (2), una base (3) y una plataforma elevadora hidráulica rodante (4). [010] According to the present invention, a carriage-type device (A) for changing mesh holders (B) is provided, which has a receiving cradle (1) for the mesh holders (B), a sliding table (2), a base (3) and a rolling hydraulic lifting platform (4).
DESCRIPCIÓN DETALLADA DE LA INVENCIÓN DETAILED DESCRIPTION OF THE INVENTION
[011] Haciendo ahora referencia a las figuras que acompañan la invención, en la figura 1 se muestra una vista en perspectiva del dispositivo (A) de la invención, en donde se aprecia la cuna receptora (1 ), la mesa deslizante (2) que es la encargada de realizar los movimientos horizontales finos para que la cuna receptora (1 ) quede exactamente alineada con el portamallas (B) que se procede a retirar de la máquina peletizadora, en tanto que la plataforma elevadora rodante (4) se encarga del transporte y acomodación gruesa del dispositivo de la invención. [011] Now referring to the figures that accompany the invention, figure 1 shows a perspective view of the device (A) of the invention, where the receiving cradle (1), the sliding table (2) can be seen which is in charge of making the fine horizontal movements so that the receiving cradle (1) is exactly aligned with the mesh holder (B) that is removed from the pelletizing machine, while the rolling lifting platform (4) is in charge of the transportation and gross accommodation of the device of the invention.
[012] La cuna receptora (1) pose dos barras de seguro (1.1) que se colocan una vez se haya extraído el portamallas y evita que éste se caiga. En la parte inferior de la cuna receptora (1), tiene una barra roscada vertical (1.2) con una volanta roscada (1.3) que permite hacer un ajuste fino a la altura de la cuna receptora (1) cuando se esté alineando con el agujero del bloque portamallas (C). [012] The receiver cradle (1) has two safety bars (1.1) that are placed once the mesh holder has been removed and prevent it from falling. At the bottom of the receiver cradle (1), it has a vertical threaded rod (1.2) with a threaded handwheel (1.3) that allows fine adjustment to the height of the receiver cradle (1) when aligning with the hole of the mesh holder block (C).
[013] La cuna receptora (1) y la barra roscada vertical (1.2) se apoyan sobre una mesa deslizante (2) la cual tiene como función ubicar milimétricamente la cuna receptora (1) en sentido horizontal cuando se requiera alinearla con el agujero del bloque portamallas (C). La mesa deslizante (2) tiene en su parte inferior dos guías horizontales cilindricas (2.3) que se deslizan dentro de unos bujes (2.4) lubricados ubicados sobre una placa soporte (2.7). En los extremos inferiores de la mesa, se tienen cuatro (4) ganchos (2.8), dos de cada lado, que aseguran la mesa deslizante (2) contra el marco del Bloque Portamallas (C). La mesa deslizante (2) se mueve milimétricamente en sentido horizontal a través de una barra roscada (2.2) que tiene una volanta (2.1) en uno de sus extremos y se rosca en una tuerca fija (2.6) que está arriba de uno de los bujes (2.4) y que tienen el conjunto de la mesa deslizante (2) soldada a la placa soporte (2.7). Esta placa soporte (2.7) tiene cuatro ruedas (2.5) que permiten mover hacia adelante y hacia atrás la mesa deslizante (2) para posicionar los ganchos (2.8) en el marco del bloque portamallas (C) cuando se está elevando la mesa hidráulica (4). [013] The receiving cradle (1) and the vertical threaded bar (1.2) are supported on a sliding table (2) which has the function of locating the receiving cradle (1) in a horizontal direction when required to align it with the hole in the mesh holder block (C). The sliding table (2) has in its lower part two cylindrical horizontal guides (2.3) that slide inside lubricated bushings (2.4) located on a support plate (2.7). At the lower ends of the table, there are four (4) hooks (2.8), two on each side, that secure the sliding table (2) against the frame of the Mesh Holder Block (C). The sliding table (2) moves millimetrically horizontally through a threaded bar (2.2) that has a handwheel (2.1) at one of its ends and is screwed into a fixed nut (2.6) that is above one of the bushings (2.4) and that have the sliding table assembly (2) welded to the support plate (2.7). This support plate (2.7) has four wheels (2.5) that allow the sliding table (2) to be moved back and forth to position the hooks (2.8) in the frame of the mesh holder block (C) when the hydraulic table is being raised ( 4).
[014] Tanto la cuna receptora (1) como el conjunto de la mesa deslizante (2) están montadas sobre una base (3) que tiene unas guías (3.1) por donde se deslizan las ruedas (2.5) de la placa soporte (2.7). En el extremo de las guías (3.1) existen unos topes (3.2) que evitan que las ruedas (2.5) se salgan de las guías (3.1). [014] Both the receiving cradle (1) and the sliding table assembly (2) are mounted on a base (3) that has guides (3.1) through which the slides slide. wheels (2.5) from the support plate (2.7). At the end of the guides (3.1) there are stops (3.2) that prevent the wheels (2.5) from coming off the guides (3.1).
[015] La placa base (3) se fija a la mesa elevadora hidráulica (4) mediante cuatro pernos (3.3). La mesa elevadora hidráulica (4) tiene capacidad para elevar máximo una tonelada y es de construcción estándar. [015] The base plate (3) is fixed to the hydraulic lifting table (4) by means of four bolts (3.3). The hydraulic lift table (4) has the capacity to lift a maximum of one ton and is of standard construction.
[016] El portamallas (B) se extrae del agujero del bloque portamallas (C) mediante una herramienta extractora (5) que también hace parte de la invención, que tiene en el extremo del vástago del pistón un Plato Empujador (5.2) que se adapta al diámetro del portamallas (B). Una vez alineado y asegurado el dispositivo (A) de la invención en el bloque portamallas (C), se inyecta aire al cuerpo (5.1) d la herramienta extractora (5) para que extraiga el portamallas (B) que se va a cambiar y lo deposite sobre la cuna receptora (1) del dispositivo (A) de acuerdo con la invención. Posteriormente, se asegura el portamallas (B) mediante las barras de seguro (1.1) que trae la cuna receptora (1) y se baja completamente la mesa hidráulica (4) y luego es llevado en el mismo dispositivo portamallas al taller para su mantenimiento. [016] The mesh holder (B) is extracted from the hole of the mesh holder block (C) by means of an extractor tool (5) that is also part of the invention, which has at the end of the piston rod a Pusher Plate (5.2) that is adapts to the diameter of the mesh holder (B). Once the device (A) of the invention has been aligned and secured in the mesh holder block (C), air is injected into the body (5.1) of the extractor tool (5) to extract the mesh holder (B) to be changed and deposit it on the receiving cradle (1) of the device (A) according to the invention. Subsequently, the mesh holder (B) is secured by means of the safety bars (1.1) provided by the receiver cradle (1) and the hydraulic table (4) is lowered completely and then it is taken in the same mesh holder device to the workshop for maintenance.
[017] Este dispositivo (A) también permite re-instalar el portamallas (B) en el bloque portamallas (C), una vez se le ha realizado el mantenimiento haciendo el procedimiento contrario al explicado anteriormente. [017] This device (A) also allows the mesh holder (B) to be re-installed in the mesh holder block (C), once the maintenance has been carried out by doing the opposite procedure to that explained above.
[018] En cuanto a la mesa elevadora hidráulica rodante (4) comprende una superficie superior (4.1 ) en donde descansa la cuna receptora (1 ), la mesa deslizante (2) y la base (3) y puede comprender un sistema de elevación (4.2) que puede ser un sistema de parales en material resistente, por ejemplo, hierro, acero etc, dos a cada lado como se muestra en la figura 2 y unidos entre sí de manera pivotal a través de un tornillo pasante. Todo el sistema de elevación (4.2) está montado sobre una base (4.4) que tiene ruedas (4.5). [018] Regarding the rolling hydraulic lifting table (4), it comprises an upper surface (4.1) where the receiving cradle (1), the sliding table (2) and the base (3) rests and can comprise a lifting system (4.2) which can be a system of posts in resistant material, for example, iron, steel etc, two on each side as shown in figure 2 and pivotally joined together through a through bolt. The entire lifting system (4.2) is mounted on a base (4.4) that has wheels (4.5).
[019] Los extremos inferiores del sistema de elevación (4.2) pueden tener a su vez un sistema de rodamiento o de desplazamiento (no mostrado) que permite su fácil movimiento a través de guías en la base (4.4) cuando se varía la altura de la mesa elevadora hidráulica rodante (4). [019] The lower ends of the lifting system (4.2) may in turn have a rolling or displacement system (not shown) that allows its easy movement through guides in the base (4.4) when the height of the the rolling hydraulic lifting table (4).
[020] En una modalidad de la invención, el sistema de elevación (4.2) puede ser accionado por un pistón hidráulico (4.3) como se muestra en la figura 2, mecánica o eléctricamente. [020] In one embodiment of the invention, the lifting system (4.2) can be actuated by a hydraulic piston (4.3) as shown in figure 2, mechanically or electrically.
[021] En otra modalidad de la invención, el sistema de elevación (4.2) puede ser un sistema de barras que conforman un acordeón el cual podría ser elevado o bajado también por un sistema tipo pistón eléctricamente accionado o con un sistema de barra pasante con piñón para bajarlo o subirlo de manera manual. [021] In another embodiment of the invention, the lifting system (4.2) can be a system of bars that make up an accordion which could be raised or lowered also by an electrically driven piston type system or with a through bar system with pinion to lower or raise it manually.

Claims

REIVINDICACIONES
1. Un dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras, caracterizado porque tiene una cuna receptora (1), una mesa deslizante (2) encargada de realizar los movimientos horizontales finos sobre una base (3) y una mesa elevadora hidráulica rodante (4) que a su vez permite realizar movimientos verticales del dispositivo (A). 1. A portable device (A) for changing polymer filter mesh holders in pelletizers, characterized in that it has a receiving cradle (1), a sliding table (2) responsible for performing fine horizontal movements on a base (3) and a table rolling hydraulic lift (4) which in turn allows vertical movements of the device (A).
2. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 , caracterizado porque la cuna receptora (1) posee barras de seguro (1.1) removibles, una barra roscada vertical (1.2), una volanta vertical roscada (1.3) que posicionan de manera vertical y milimétrica la cuna receptora (1) frente a un bloque portamallas (C) y caracterizado además porque la barra roscada vertical2. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that the receiving cradle (1) has removable safety bars (1.1), a vertical threaded bar (1.2), a vertical threaded handwheel (1.3) that vertically and millimetrically position the receiving cradle (1) in front of a mesh holder block (C) and further characterized in that the vertical threaded bar
(1.2) se coloca en un buje soporte (2.9) ubicado en la parte superior del centro de la mesa deslizante (2) y en donde la volanta vertical roscada(1.2) is placed in a support bushing (2.9) located in the upper part of the center of the sliding table (2) and where the threaded vertical handwheel
(1.3) junto con dicha barra roscada vertical (1.2) conforman el sistema que permite posicionar de manera vertical y milimétrica la cuna receptora (1) frente al bloque portamallas (C). (1.3) together with said vertical threaded bar (1.2) make up the system that allows the receiving cradle (1) to be positioned vertically and millimetrically in front of the mesh holder block (C).
3. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 , caracterizado porque la mesa deslizante (2) se mueve milimétricamente en sentido horizontal a través de una barra roscada (2.2) que tiene una volanta (2.1) en uno de sus extremos y se rosca en una tuerca fija (2.6) que está arriba de uno de los bujes (2.4) y que tienen el conjunto de la mesa deslizante (2) soldada a la placa soporte (2.7) 3. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that the sliding table (2) moves millimetrically horizontally through a threaded bar (2.2) having a handwheel (2.1) at one of its ends and is screwed into a fixed nut (2.6) that is on top of one of the bushings (2.4) and that has the sliding table assembly (2) welded to the support plate (2.7)
4. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 , caracterizado porque la placa soporte (2.7) tiene cuatro ruedas (2.5) que permiten mover hacia adelante y hacia atrás la mesa deslizante (2) para posicionar los ganchos (2.8) en el marco del bloque portamallas (C) cuando se está elevando la mesa hidráulica (4) y fija el dispositivo al bloque portamallas (C). 4. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that the support plate (2.7) has four wheels (2.5) that allow moving the sliding table (2.5) forwards and backwards ( 2) to position the hooks (2.8) in the frame of the mesh holder block (C) when the hydraulic table (4) is being raised and fix the device to the mesh holder block (C).
5. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 , caracterizado porque la base (3) tiene unas guías (3.1) por donde se deslizan las ruedas (2.5) de la placa soporte (2.7) y en donde el extremo de las guías (3.1) tiene topes (3.2) que evitan que las ruedas (2.5) se salgan de las guías (3.1). 5. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that the base (3) has guides (3.1) where the wheels (2.5) of the support plate (2.7) slide and where the end of the guides (3.1) has stops (3.2) that prevent the wheels (2.5 ) come out of the guides (3.1).
6. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 caracterizado porque la placa base (3) se fija a la mesa elevadora hidráulica (4) mediante cuatro pernos (3.3). 6. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that the base plate (3) is fixed to the hydraulic lifting table (4) by means of four bolts (3.3).
7. El dispositivo (1) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 caracterizado porque además tiene una herramienta extractora (5) que tiene en el extremo del vástago del pistón un plato empujador (5.2) que se adapta al diámetro del portamallas (B). 7. The portable device (1) for changing polymer filter mesh holders in pelletizers according to claim 1, characterized in that it also has an extractor tool (5) that has at the end of the piston rod a pusher plate (5.2) that is adapts to the diameter of the mesh holder (B).
8. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 7 caracterizado porque la una herramienta extractora (5) extrae el portamallas (B) que se va a cambiar y lo deposita sobre la cuna receptora (1) del dispositivo portátil (A). 8. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 7 characterized in that an extractor tool (5) extracts the mesh holder (B) to be changed and places it on the receiving cradle (1) of the portable device (A).
9. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 1 caracterizado porque la mesa elevadora hidráulica (4) tiene una superficie superior (4.1) en donde descansa la cuna receptora (1), la mesa deslizante (2) y la base (3) y tiene un sistema de elevación (4.2) que está montado sobre una base (4.4) que tiene ruedas (4.5). 9. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 1 characterized in that the hydraulic lifting table (4) has an upper surface (4.1) where the receiving cradle (1) rests, the sliding table (2) and base (3) and has a lifting system (4.2) that is mounted on a base (4.4) that has wheels (4.5).
10. El dispositivo (A) portátil para cambiar portamallas de filtros de polímeros en peletizadoras de acuerdo con la reivindicación 9 caracterizado porque el sistema de elevación (4.2) tiene un sistema de barras que conforman un acordeón para elevar o bajar el dispositivo (A) a través de un sistema tipo pistón eléctricamente accionado o con un sistema de barra pasante con piñón para bajarlo o subirlo de manera manual. 10. The portable device (A) for changing polymer filter mesh holders in pelletizers according to claim 9 characterized in that the lifting system (4.2) has a system of bars that make up an accordion to raise or lower the device (A) through an electrically actuated piston type system or with a through bar system with pinion to lower or raise it manually.
PCT/IB2020/059618 2019-10-29 2020-10-14 Portable device for changing screen holders of polymer filters in pelletisers WO2021084359A1 (en)

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US3799351A (en) * 1972-12-13 1974-03-26 F Tewes Quick change filtering machine
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