EP4059632A1 - Tête de lubrification de moule avec système de réglage de buse - Google Patents

Tête de lubrification de moule avec système de réglage de buse Download PDF

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Publication number
EP4059632A1
EP4059632A1 EP22160022.4A EP22160022A EP4059632A1 EP 4059632 A1 EP4059632 A1 EP 4059632A1 EP 22160022 A EP22160022 A EP 22160022A EP 4059632 A1 EP4059632 A1 EP 4059632A1
Authority
EP
European Patent Office
Prior art keywords
head
valve
nozzles
nozzle
driving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22160022.4A
Other languages
German (de)
English (en)
Other versions
EP4059632B1 (fr
EP4059632C0 (fr
Inventor
Michele GOZIO
Flavio Morandi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paolo Gozio Srl
Original Assignee
Paolo Gozio Srl
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 Paolo Gozio Srl filed Critical Paolo Gozio Srl
Publication of EP4059632A1 publication Critical patent/EP4059632A1/fr
Application granted granted Critical
Publication of EP4059632B1 publication Critical patent/EP4059632B1/fr
Publication of EP4059632C0 publication Critical patent/EP4059632C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
    • B05B12/04—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for sequential operation or multiple outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2486—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device with means for supplying liquid or other fluent material to several discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B22C23/02—Devices for coating moulds or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/065—Cooling or heating equipment for moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/12—Treating moulds or cores, e.g. drying, hardening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/2007—Methods or apparatus for cleaning or lubricating moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases

Definitions

  • the present invention relates to the field of machines and equipment for molding metal materials.
  • the subject of the present invention is a lubricating head for dispensing a lubricating fluid onto the surface of the mold.
  • the invention is also applicable to the plastics molding industry.
  • an injection molding machine comprises a fixed plane carrying a first half-mold and a movable plane carrying a second half-mold.
  • Each half-mold on its inner face, has a plurality of cavities which, coupling with those of the other half-mold, form the imprints corresponding to the pieces to be molded.
  • the movable plane moves closer to the fixed plane until the two half-molds are coupled (closed mold), and, after injecting molten material and waiting a predetermined time interval, the movable plane moves away from the fixed plane, allowing the extraction of the parts (open mold).
  • a lubricating fluid sometimes also a coolant
  • a lubricating head which, placed between the two half-molds when the mold is open, dispenses a plurality of jets, in a manner oriented toward the faces of the half-molds.
  • the lubricating head comprises a plurality of nozzles.
  • the heads currently known require long set-up times, which are necessary for disassembling the head, modifying the position of the nozzles or changing the configuration thereof, and reassembling the head.
  • the assembly 1 comprises, for example, a press 2 comprising a base 4, a fixed plane 6, and a movable plane 8 supported by the base 4.
  • the fixed plane 6 supports a first half-mold 10 and the movable plane 8 supports a second half-mold 12; the two half-molds comprise a mold.
  • Each half-mold 10, 12 on the respective inner face 10a, 12a has a plurality of cavities which, coupling with the cavities of the other half-mold when the mold is closed, form imprints of the parts to be molded.
  • the assembly 1 further comprises a lubricator 14 for dispensing jets of lubricating fluid and/or coolant onto the inner faces 10a, 12a of said half-molds 10, 12; the lubricator 14 comprises a column 16 and a lubricating head 18, suspended from the column 16. The lubricator 14 is configured to move the head 18 so as to arrange it between the half-molds 10, 12 when the mold is open (working configuration of the lubricator).
  • the head 18 comprises a head body 18b comprising a regular solid, for example a parallelepiped, having a plurality of head faces 18a, wherein at least one head face 18a, in the working configuration, faces an inner face 10a, 12a of the mold.
  • a head body 18b comprising a regular solid, for example a parallelepiped, having a plurality of head faces 18a, wherein at least one head face 18a, in the working configuration, faces an inner face 10a, 12a of the mold.
  • the head 18 comprises a plurality of nozzles 20 arranged on at least one of said head faces 18a; each nozzle 20 is adapted to deliver a jet of fluid, typically comprising a liquid portion and air, which together form a nebulized product intended to be deposited on the inner faces 10a, 12a of the half-molds 10, 12.
  • the arrangement of the nozzles is assimilable to a nozzle matrix M provided with m rows and n columns.
  • the nozzle U11 is the nozzle that covers the position (1,1) corresponding to the row 1 and the column 1.
  • the arrangement of the nozzles Uij on the head face 18a of the head 18 need not be in rows and columns; in other words, the matrix M remains associated with a region of the head face, and the identification of the nozzle Uij is carried out with reference to that region.
  • the region R is identified in which nozzles Uij are present.
  • the nozzle U11 is the nozzle that covers the position (1,1), corresponding to row 1 and column 1 of the region R.
  • a nozzle 20 has a liquid port 22 for the outlet of the jet of liquid, an air port 24 for the outlet of the jet of pressurized air, a driven liquid valve 22a, a nozzle driving line 22b for driving the liquid valve 22a, a nozzle liquid line 22c for supplying the pressurized liquid, and a nozzle air line 24c for supplying the pressurized air.
  • the nozzle liquid line 22c is suppliable by a nozzle liquid connection 22' and is connectable to the liquid port 22, and the liquid valve 22a, which is normally closed and adapted to switch from the closed to the open configuration, is operational therebetween;
  • the nozzle driving line 22b is supplied by a driving connection nozzle 23 and is connected to the liquid valve 22a to drive it from the closed to the open configuration;
  • the nozzle air line 24c is suppliable by a nozzle air connection 24' and is directly connected to the air port 24.
  • the liquid valve 22a' is normally open and adapted to switch from the open configuration to the closed configuration; the nozzle driving line 22b is connected to the liquid valve 22a' to drive it from the open configuration to the closed configuration.
  • the nozzle 20 comprises, moreover, a driven air valve 24a; the nozzle air line 24c is connectable to the air port 24, and the air valve 24a, which is normally closed and adapted to switch from the closed to the open configuration, is operational therebetween; the nozzle driving line 22b is also connected to the air valve 24a to drive it from the closed to the open configuration.
  • the head 18 comprises a head liquid line 32 connected to the nozzle liquid connections 22' of all the nozzles 20 of the head face 18a of the head 18 and a head air line 34 connected to the nozzle air connections 24' of all the nozzles 20 of the head face 18a of the head 18.
  • a main liquid valve 32a placed upstream of the head liquid line 32, is adapted to be electrically controlled to open or close the pressurized liquid supply to the head liquid line 32.
  • a main air valve 34a placed upstream of the head air line 34, is adapted to be electrically controlled to open or close the pressurized air supply to the head air line 34.
  • the head 18 comprises a plurality of first head driving branches 33, wherein each first head driving branch 33 is a driving line connectable to the respective liquid valve 22a of a plurality of nozzles 20, for example, all the nozzles of a predetermined row of a matrix M configuration or a region R configuration.
  • first head driving valves 33a are provided, wherein each first head driving valve 33a is located upstream of a respective first head driving branch 33 and adapted to be electronically controlled to open or close the supply of driving fluid to said first head driving branch 33.
  • the head 18 comprises, for each nozzle 20, a driving management valve 35 arranged between each first head driving branch 33 and the liquid valve 22a of the respective nozzle 20, e.g., normally closed and adapted to switch into an opening configuration to place said first head driving branch 33 in communication with the liquid valve 22a to drive it to open.
  • a driving management valve 35 arranged between each first head driving branch 33 and the liquid valve 22a of the respective nozzle 20, e.g., normally closed and adapted to switch into an opening configuration to place said first head driving branch 33 in communication with the liquid valve 22a to drive it to open.
  • the head 18 comprises a plurality of second head driving branches 37, wherein each second head driving branch 37 is a driving line connected to the driving management valves 35 of a plurality of nozzles 20, e.g., all the nozzles of a predetermined column of a matrix M configuration or a region R configuration.
  • the nozzles of a predetermined row comprise a first plurality of nozzles and the nozzles of a predetermined column comprise a second plurality of nozzles, said first plurality of nozzles and said second plurality of nozzles have at least one nozzle in common.
  • second head driving valves 33b are provided, wherein each second head driving valve 33b is placed upstream of a respective second head driving branch 37 and adapted to be electronically controlled to open or close the driving fluid supply to said second head driving branch 37.
  • the main air valve 34a may be opened, causing air to be blown from the air ports 24 of all the nozzles 20, which is sometimes desired for cleaning the half-mold.
  • the main liquid valve 32a may be opened to put pressure on the head liquid line 32; however, as long as there is no driving of the liquid valves 22a of the nozzles 20, no dispensing of the liquid will occur.
  • the opening of a predetermined first head driving valve 33a allows for pressurizing and supplying driving fluid to a respective first head driving branch 33, which is intercepted, upstream of the respective nozzles 20, by the respective driving management valves 35, so that, as long as there is no driving of the driving management valves 35, there is no opening of the respective liquid valves 22a.
  • a predetermined second head driving valve 33b allows for the respective driving management valves 35 to be driven to open, and this allows for the liquid valves 22a of the nozzles 20 supplied by the first head driving branch 33 corresponding to the first open head driving valve 33a to open.
  • such a system allows liquid to be dispensed from a predetermined nozzle Uij by opening the i-th first head driving valve 33a and the j-th second head driving valve 33b.
  • opening the i-th first head driving valve 33a and the j-th second head driving valve 33b it is possible to select individually the nozzles of an entire matrix M or region R to be enabled for liquid dispensing according to the requirements.
  • the head setting method comprises:
  • the nozzles 20 mentioned above are of the nozzle type NC; according to a variant, said nozzles are of the nozzle type NO.
  • each nozzle 20 comprises an air valve 24a (nozzle GZ NO, Fig. 6 ), which is connectable to the first head driving branch 33 by means of the respective driving management valve 35, which in turn may be drivable by the second head driving branch 37.
  • the driving management valve 35 is a driven check valve, suitable for maintaining pressure in the driving line to which it is connected downstream, even when the driving fluid supply from the respective first head driving valve 33a ceases, and when the command coming from the respective second head driving valve 33b to drive to open ceases, since said downstream driving line is not connected to the drain.
  • nozzles U11, U13, U22, U24, U31, U33, U34, U42, and U43 must be activated. While the main liquid valve 32a is closed, the main air valve 34a is closed, and the main driving line 39 is pressurized:
  • the setting method of the present invention is executable by a head 18
  • an air valve 24" is placed upstream of the nozzle 20 ( Fig. 4a ); similarly, using a nozzle NC ( Fig. 5 ), an air valve 24" is placed upstream of the nozzle 20 ( Fig. 5a ).
  • a lubricating apparatus ( Fig. 10 ) comprises the lubricator 14 described above, valve means 90 comprising the first head driving valves 33a, the second head driving valves 33b, the main liquid valve 32a and the main air valve 34a, and a management device 100, which is operationally connected to the lubricator and valve means 90 for managing lubricator operations.
  • the management device comprises electronic management means 105 adapted to be configured or programmed, for example by software, for the programmed actuation of the main liquid valve 32a, the main air valve 34a, the first head driving valves 33a and the second head driving valves 33b.
  • said electronic management means comprise a microchip or a dedicated circuit board.
  • the management device 100 comprises storage means 110 adapted to store data identifying a predetermined mold and setting data for identifying the nozzles to be activated for lubricating or cooling said predetermined mold.
  • the storage means 110 are operationally connected with the electronic management means and, preferably, with the lubricator 14, so that, when a predetermined mold is reused, the nozzles identified by the setting data are automatically activated by the electronic management means 105.
  • the management device 100 comprises temperature detection means 115 adapted to detect the temperature at a plurality of discrete locations identified on the face of a half-mold by defining temperature data comprising a temperature matrix T wherein each discrete location on the face of the half-mold corresponds to the detected temperature.
  • the management device 100 further comprises processing means 120 adapted to process the temperature matrix T and generate nozzle setting data to define which nozzles to activate in order to achieve optimal lubrication or cooling of the half-mold.
  • the processing means 120 are operationally connected to the electronic management means 105 to activate the nozzles identified by the setting data during the lubrication and/or cooling cycles performed between molding cycles.
  • the head with a nozzle setting system according to the present invention meets the needs of the industry and overcomes the drawbacks discussed above with reference to the prior art.
  • the head allows, when setting the nozzles, to work remotely, eliminating the need for the operator to physically intervene on the head.
  • the head allows for nozzle setting operations to be performed quickly and the preferred setting for a predetermined mold to be stored so that it may be recalled in subsequent operations.
  • the head according to the invention allows for predetermined and automatic nozzle cleaning cycles to be carried out.
  • the head according to the invention allows for working together with a thermo-detection system operating on the mold, to coordinate and optimize the lubrication and cooling of the molds.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP22160022.4A 2021-03-15 2022-03-03 Tête de lubrification de moule avec système de réglage de buse Active EP4059632B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102021000006104A IT202100006104A1 (it) 2021-03-15 2021-03-15 Testa di lubrificazione per stampi con sistema di settaggio degli ugelli

Publications (3)

Publication Number Publication Date
EP4059632A1 true EP4059632A1 (fr) 2022-09-21
EP4059632B1 EP4059632B1 (fr) 2023-09-27
EP4059632C0 EP4059632C0 (fr) 2023-09-27

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EP22160022.4A Active EP4059632B1 (fr) 2021-03-15 2022-03-03 Tête de lubrification de moule avec système de réglage de buse

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EP (1) EP4059632B1 (fr)
IT (1) IT202100006104A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309887B6 (cs) * 2022-08-23 2024-01-10 ŠKODA AUTO a.s. Přípravek pro nastavení ošetřovací hlavy technologie tlakového lití pro ošetření licí formy

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247047A (en) * 1979-01-15 1981-01-27 Schaming Edward J Modular zoned digital coolant control system for strip mill rolls
US4760961A (en) * 1987-02-13 1988-08-02 The Snair Company Modular sprayhead assembly
EP1350572A2 (fr) * 2002-04-04 2003-10-08 Acheson Industries Deutschland Outil de pulvérisation
US20070075164A1 (en) * 2003-06-13 2007-04-05 Rudolf Wollin Spraying tool for casting molds
US20140263752A1 (en) * 2013-03-15 2014-09-18 Michael R. Steiner Automated sprayer assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4247047A (en) * 1979-01-15 1981-01-27 Schaming Edward J Modular zoned digital coolant control system for strip mill rolls
US4760961A (en) * 1987-02-13 1988-08-02 The Snair Company Modular sprayhead assembly
EP1350572A2 (fr) * 2002-04-04 2003-10-08 Acheson Industries Deutschland Outil de pulvérisation
US20070075164A1 (en) * 2003-06-13 2007-04-05 Rudolf Wollin Spraying tool for casting molds
US20140263752A1 (en) * 2013-03-15 2014-09-18 Michael R. Steiner Automated sprayer assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ309887B6 (cs) * 2022-08-23 2024-01-10 ŠKODA AUTO a.s. Přípravek pro nastavení ošetřovací hlavy technologie tlakového lití pro ošetření licí formy

Also Published As

Publication number Publication date
EP4059632B1 (fr) 2023-09-27
IT202100006104A1 (it) 2022-09-15
EP4059632C0 (fr) 2023-09-27

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