EP1321258B1 - Equipment for removing water and sediments from molds for producing single-layer cement tiles - Google Patents

Equipment for removing water and sediments from molds for producing single-layer cement tiles Download PDF

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Publication number
EP1321258B1
EP1321258B1 EP20020425765 EP02425765A EP1321258B1 EP 1321258 B1 EP1321258 B1 EP 1321258B1 EP 20020425765 EP20020425765 EP 20020425765 EP 02425765 A EP02425765 A EP 02425765A EP 1321258 B1 EP1321258 B1 EP 1321258B1
Authority
EP
European Patent Office
Prior art keywords
container
containers
suction
valves
valve
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.)
Expired - Fee Related
Application number
EP20020425765
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1321258A2 (en
EP1321258A3 (en
Inventor
Alfredo Longinotti
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.)
Longinotti Meccanica SRL
Original Assignee
Longinotti Meccanica 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 Longinotti Meccanica SRL filed Critical Longinotti Meccanica SRL
Publication of EP1321258A2 publication Critical patent/EP1321258A2/en
Publication of EP1321258A3 publication Critical patent/EP1321258A3/en
Application granted granted Critical
Publication of EP1321258B1 publication Critical patent/EP1321258B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
    • B28B7/386—Cleaning

Definitions

  • GB.A.458.708 provides an equipment according to the preamble of claim 1.
  • the invention relates to equipment which enables excess water (and sediments and residues of cement and powdered marble in suspension) to be removed systematically and continuously during the working of the press, without the need for manual intervention for this operation.
  • the equipment can also be used for similar applications.
  • each of the suction valves is of a type which switches from the open state, for suction by means of a vacuum pump, to a state in which it is closed toward the vacuum pump but open toward the exterior, to eliminate the vacuum in the corresponding container and permit or facilitate its emplying.
  • At least the inlet valves and the discharge valves are preferably of the type comprising a portion of compressible tubing - made from rubber or other material - and a clamp means for squeezing the said portion of tubing. Valves df this type can operate without problems, even when sediments are present in the liquid (water) passing through them.
  • All the components of the equipment can be grouped together in a framework and connected by tubes of rubber or the like to the press, to the vacuum pump, to the outlet of the said vacuum pump, and to a store for the waste material discharged cyclically and alternately from the containers.
  • Each of the containers can be provided with at least one maximum level sensor, to enable the operation of the two containers to be switched over when a certain level of filling of the corresponding container is reached, and also a minimum level sensor if required.
  • internal detectors are used for directly monitoring the level in each container. For practicality of operation, only one maximum level detector, causing a full container to be discharged, was used; if the bottom discharge valve fails to work, the maximum level is also reached in the second container, and the machine stops.
  • the equipment in question serves to collect and remove water, with any sediments contained in it, arriving from the press block or :blocks P through flexible tubes, collectors or other apparatus, which are all connected to a suction tube A3 leading to the equipment in question.
  • the equipment comprises two preferably transparent containers 1 A and 1 B, in which there is a vacuum to enable the water and sediments to be sucked from the tube A3; the vacuum in the two transparent containers 1A and 1B is created by a pump 3, particularly a liquid ring pump, which is supplied with pressurized water with a low rate of flow, to provide the seal between the impeller and the pump casing; the number 4 indicates the water supply; 4A indicates a flow controller which controls the actual passage of water; the number 5 indicates a valve for shutting off the supply and 5A indicates a pressure reducer.
  • a pump 3 particularly a liquid ring pump, which is supplied with pressurized water with a low rate of flow, to provide the seal between the impeller and the pump casing
  • the number 4 indicates the water supply
  • 4A indicates a flow controller which controls the actual passage of water
  • the number 5 indicates a valve for shutting off the supply
  • 5A indicates a pressure reducer.
  • the tube A3 is connected to the two containers 1 A and 1 B, opening from above in the areas 6A and 6B which are provided with suitable partitions.
  • the container 1A contains a vacuum and is therefore active, while the container 1B is discharging water and sediment which have been previously sucked into it and accumulated.
  • a pneumatically operated suction valve 7 for the container 1A is open, while the identical valve 9 for the container 1B is closed for the purposes of suction and is open towards the exterior.
  • the tube A3, running from the press, has a branch which is connected to a pneumatically operated inlet valve 8 for the container 1A, this valve being open, while the identical inlet valve 10 for the container 1B is closed.
  • a discharge valve 11 of this container 1A is closed, while the identical valve 13 of the container 1B is open, because the container 1B is discharging.
  • the valves 8 to 10, 11 and 13 are pneumatically operated (with an elastic return system), being operated by a source of compressed air with a pressure regulator 12R.
  • the use of all these pneumatically operated valves enables the operating logic to be significantly simplified. This is because the compressed air supply valve 12, which is electromagnetically operated and “bistable", according to whether its left-hand coil or its right-hand coil is energized, sends the pressure to the line 12A while the line 12B is in the discharge state, or vice versa. Since all the valves 7, 8, 9, 10, 11 and 13 have the "open” or "closed” function in their operating logic, it is simply necessary to connect the control lines 12A and 12B appropriately, as indicated in the diagram in Fig. 1, to provide a satisfactory automatic control system and the correct switching of the suction and discharge functions between the two containers 1A and 1B.
  • valves 8 and 10 and the valves 11 and 13 are chosen in accordance with their functions. Both water and sediment (as well as air) pass through the valves 8 and 10 and through the valves 11 and 13, and therefore the tubes cannot be closed by means of flat gate valves, cone valves, ball valves, or other types. It was therefore decided to use special "clamp" valves which operate by opening or closing - by means of a clamp operated by a pneumatic cylinder - a portion of rubber tube of suitable diameter through which the water and the sediment (and air) pass; these valves have a long service life, and are usually trouble-free.
  • the two valves 7 and 9 are not of the aforesaid type, since they are used to create the vacuum in the suction connectors 3A, through which only air passes.
  • the two valves 7 and 9 are of the gate type, and are characterized in that each of them, when stopping the suction by the pump 3, allows air to pass into the corresponding container to eliminate the vacuum and allow the corresponding valve 11 or 13 to discharge. It should be remembered that the suction and discharge take place alternately in the two containers.
  • the equipment is made from components which are, as far as possible, grouped together in a single structure 14 (see Figs. 2 to 5).
  • flexible tubes are used between the pump 3 and the containers 1A and 1B.
  • the pump 3 is positioned on the same supporting structure 14 as the containers 1A and 1B, and is fixed there by means of suitable elastic elements.
  • the tube 3A connects the pump 3 to the two valves 7 and 9; a vacuum gauge 15 indicates the degree of vacuum present in the containers 1A and 1B alternately.
  • the two branches of the tube 3A are positioned at a distance from the inlets of the corresponding vacuum tubes 3A, in areas 6A and 6B which are suitably shielded, to prevent the risk of direct suction of water (and sediment) by the pump 3.
  • a tube 16 serves to discharge the water for maintaining the seal of the pump 3. The water arriving from the supply 4, and the air which is sucked in by the pump after having passed from the tube 3A through the active container and the pump, are discharged along the said tube 16.
  • Two maximum level detectors S1A and S1B (Figs. 3 and 5), for the containers 1A and 1B respectively, detect the maximum level of the liquid in the corresponding containers.
  • the operation is switched from this container to the other one during the first stage of rotation of the mold support of the press; it is preferable for the changeover to be carried out at this stage, because no pressing is taking place and thus, even if there is a brief interruption of the vacuum, this has no effect on the quality of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
EP20020425765 2001-12-18 2002-12-12 Equipment for removing water and sediments from molds for producing single-layer cement tiles Expired - Fee Related EP1321258B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI20010240 2001-12-18
ITFI20010240 ITFI20010240A1 (it) 2001-12-18 2001-12-18 Apparecchiatura per lo smaltimento di acqua con sedimenti dagli stampi per la produzione di mattonelle di cemento monostrato

Publications (3)

Publication Number Publication Date
EP1321258A2 EP1321258A2 (en) 2003-06-25
EP1321258A3 EP1321258A3 (en) 2004-05-12
EP1321258B1 true EP1321258B1 (en) 2006-03-22

Family

ID=11442305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020425765 Expired - Fee Related EP1321258B1 (en) 2001-12-18 2002-12-12 Equipment for removing water and sediments from molds for producing single-layer cement tiles

Country Status (4)

Country Link
EP (1) EP1321258B1 (it)
DE (1) DE60210040T2 (it)
ES (1) ES2258138T3 (it)
IT (1) ITFI20010240A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104669419B (zh) * 2015-03-10 2017-04-26 盐城工学院 一种承口托环脱模清理机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL47515C (it) * 1935-10-05
GB1128166A (en) * 1965-04-14 1968-09-25 Lacy Hulbert And Company Ltd Improvements in drying apparatus

Also Published As

Publication number Publication date
DE60210040T2 (de) 2007-02-22
ITFI20010240A1 (it) 2003-06-18
ES2258138T3 (es) 2006-08-16
EP1321258A2 (en) 2003-06-25
EP1321258A3 (en) 2004-05-12
DE60210040D1 (de) 2006-05-11

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