Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
  • C03B11/02—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing in machines with rotary tables
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P40/00—Technologies relating to the processing of minerals
  • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
  • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

• the invention concerns machines for pressing glass objects easily, extracted from the mould, such as glasses, cups, bowls, ashtrays and similar articles.
• Machines for manufacturing glass objects by pressing are well known.
• the molten glass flows through a feed channel in which it is brought to a temperature giving it the right degree of viscosity to enable drops of a stable size and weight to be formed to produce objects that are all the same.
• the drops of molten glass are caused to fall into the moulds of a continuous forming line, one after another, passing through a press where compression is done by a counter-mould.
• the temperature of the object falls to a level at which the object becomes rigid.
• the object can then be taken out, given heat treatment fol ⁇ lowed by cooling.
• Subject of the invention is a machine for manufacturing glass objects, said machine comprising one or more pres- sing units .
• Each of said units comprises a horizontal discoid plate, rotating intermitten ly, which supports the moulds spaced at equal distances round a circumference, and comprises a press for insertion of a counter-mould in the mould as soon as the drop of glass mixture has been received, an extractor for extracting the moulded object and an actua ⁇ tor for transferring the moulded objects to the trays on the conveyor which carries them to the heat * - treatment furnace .
• each mould Due to rotation of the discoid plate each mould in turn passes on to the various work stations, these being the dr ip d i s t r ibutor , the pres s wi th counter-mould , the extractor and the actuator.
• the various moulding units substantial ⁇ ly the same, are synchronised one with another, with the drip distributor and with the conveyor to heat treatment.
• the number of moulds in each pressing unit, the moulding cycle at each unit consisting of passage of one mould through each work station, speed of the conveyor to the heat-treat ⁇ ment furnace, distance between the trays on said conveyor, distance between the moulds on the discoid plate, are all calculated to ensure transfer of a moulded object through each phase from the mould to its place in a tray on the conveyor .
• the different pressing units are motor driven and are pro ⁇ vided with actuators and means of operation and control, unified or independent, so that starting and stopping can be carried out simultaneously, regulation of each unit be done independently, as well as stoppage of one or more units in the event of failures, operational irregularity, rejected material and anything else while the other units continue to function normally.
• Fig. 1 The machine subject of the invention, seen from above.
• Fig. 2 The same seen from the front, partially cut away.
• the machine 10 comprises the two pressing units 11 and 12 supported by the platform 13 common to both.
• Each pressing unit comprises a column 20 freely support- ing the horizontal discoid plate 21 around whose circum ⁇ ference are situated the moulds 30 for the glasses 15 to be manu actured .
• the plate 21 is driven by an electric motor 22 by means of the clutch 23 and mechanism 24.
• the motor shaft is connected to the clutch shaft by pulleys 25 and 26 and by the belt 27.
• the shunt 28 is mounted for connection to the distributor 29 that drives the various master cylinders controlling the machine and especially the pressing device, extractor and other parts.
• the base 14 protects the bottom end of the column.
• the press 16 is placed on the platform 13 and comprises columns 35 and 36 connected at the top to column 20 by means of an arm 37 supporting the master cylinder 38 which operates the piston 39 fixed to the counter-mould 31.
• the cage 40 round the piston supports the head 41 on which the springs 42 act to close the moulds 30.
• the terminal 43 of channel 44 supplies drops of glass mixture through two distributing means 45 and 46 connected to the vertical tubes 47 and 48 whose outlets lie on top of the circular trajectory through which the moulds 30 pass.
• the terminal 51 of the con ⁇ veyor 50 with trays 52 to receive the pressed glass objects and carry them into the heat- treatment furnace.
• the positions of devices 53 coincide with those of the plates 21, said devices comprising the master cylinder 54 and pis ⁇ ton 55 with pincers (the pincers are not shown in the draw ⁇ ings for simplicity) to transfer the objects 15,pressed by the moulds 30 onto the trays 52.
• the moulds 30 pass continually, one after another, to the stations coinci ⁇ ding with the positions of the distributing means 45 and 46, of the counter-mould 31, the extractors (not seen in the draw ings) and of the pincers in the pick-up devices 53, stopping for time needed to allow the following phenomena to take place simultaneously in the adjacent moulds 30: a drop of glass mixture deposited in a mould 30, pressing of said drop in the mould, extraction of the moulded object, transfer of an extracted object onto the tray on the conveyor.
• the two units are motor-driven and are operated independently; it is thus possible to stop one of them separately and so also the drop distributor and the de ⁇ vice for transfer onto the conveyor for heat treatment; in- dependent control of the two units is therefore also possi ⁇ ble in the event of irregular functioning, rejected material or other trouble.
• the machine is of course also designed for combined and syn ⁇ chronised operation by means of a single control system and adequate regulation.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=11167463

Family Applications (1)

Country Status (2)

Cited By (1)

Citations (4)

• 1990
  • 1990-05-30 IT IT02047290A patent/IT1248831B/it active IP Right Grant
  • 1990-10-19 WO PCT/IT1990/000086 patent/WO1991018840A1/en not_active Ceased

Patent Citations (4)

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