EP0970790B1 - Mixer for manufacturing blocks of stone material - Google Patents

Mixer for manufacturing blocks of stone material Download PDF

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Publication number
EP0970790B1
EP0970790B1 EP99201970A EP99201970A EP0970790B1 EP 0970790 B1 EP0970790 B1 EP 0970790B1 EP 99201970 A EP99201970 A EP 99201970A EP 99201970 A EP99201970 A EP 99201970A EP 0970790 B1 EP0970790 B1 EP 0970790B1
Authority
EP
European Patent Office
Prior art keywords
mixer
cylinder
vacuum
metering
chamber
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 - Lifetime
Application number
EP99201970A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0970790A3 (en
EP0970790A2 (en
Inventor
Luca Toncelli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0970790A2 publication Critical patent/EP0970790A2/en
Publication of EP0970790A3 publication Critical patent/EP0970790A3/en
Application granted granted Critical
Publication of EP0970790B1 publication Critical patent/EP0970790B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
    • B28C5/146—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis with several stirrers with parallel shafts in one container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/70—Mixers specially adapted for working at sub- or super-atmospheric pressure, e.g. combined with de-foaming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/714—Feed mechanisms for feeding predetermined amounts
    • B01F35/7141—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames
    • B01F35/71411—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis
    • B01F35/714111—Feed mechanisms for feeding predetermined amounts using measuring chambers moving between a loading and unloading position, e.g. reciprocating feed frames rotating or oscillating about an axis the measuring chambers being pockets on the circumference of a drum rotating about a horizontal axis with discharging by gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/46—Arrangements for applying super- or sub-atmospheric pressure during mixing; Arrangements for cooling or heating during mixing, e.g. by introducing vapour
    • B28C5/462—Mixing at sub- or super-atmospheric pressure
    • B28C5/464—Mixing at sub- or super-atmospheric pressure at sub-atmospheric pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
    • B28C7/067—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors by means of stationary hoppers, chambers or bins from which the material is fed gravitationally, e.g. having agitating means therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/14—Supply means incorporated in, or mounted on, mixers

Definitions

  • the present invention relates to a mixer for the manufacture of blocks of stone material and more specifically to a device for supplying additives to the mixer used in those installations.
  • Italian Patent No. 1.181.570 describes and claims an improvement in the process and in the installation for manufacturing blocks of material in which a mineral, such as marble, natural stone and the like, in the form of granules or particles of a controlled and predetermined size is mixed with a binder, and the mixture, after an homogenisation stage, is loaded into a mould in which the mixture is subjected to a compacting action under vacuum accompanied by a vibrating movement of predetermined frequeney.
  • a mineral such as marble, natural stone and the like
  • the pre-formed material in the mould is then caused to harden thereby, forming a block capable of being sawn and converted into manufactured articles, such as slabs for paving, coverings etc., in the same manner as a block of natural stone.
  • This prior patent relates specifically to an improvement regarding the mixing stage and according thereto, not only the stage of compacting and applying a vibrating movement must take place under a predetermined vacuum, but also the mixing stage should be carried out likewise.
  • the block so obtained is single-coloured and therefore, in the past, for trying to better imitate the natural stone and the aesthetic effects thereof, one or more colouring substances were added to the mixture.
  • the principal object of the present invention is to solve that technical problem and in particular to provide a mixer and more specifically a device for loading additives, specifically colouring agents, to be added to the mixture when the latter is in the mixing stage under vacuum in an automatic and controlled manner and without it being necessary to change the state of vacuum established in the mixer during the stage of preparing and discharging the mixture into the mould.
  • a mixer of the conventional type for this kind of installation so that it is therefore sufficient to mention that it comprises a mixing chamber 10 shaped in such a manner, as to accomodate and to allow the synchronous rotation of two parallel horizontal shafts 12 and 14 which are rotated by means not shown and which are each provided with eight mixing blades 16 offset by 90° relative to one another, as shown more especially in Figure 4.
  • the mixer is provided with the usual lower opening for discharging the mixture prepared in it towards a vacuum chamber, which opening is naturally closed by a suitable small door operated at the end of each mixing cycle, and with a vacuum-tight upper cover 18 for loading the ingredients to be mixed into the chamber 10.
  • metering devices generally indicated 20 are fixed rigidly to the cover in such a manner that they move integrally therewith in its movements between the opening and closing positions.
  • the metering device comprises two upright side walls 22 and 24 anchored to the cover 18 of the mixer and an upper horizontal partition 26 having an opening 28 which is centred between the two side waIls 22 and 24 and which accommodates the two downwardly converging sides 30 and 32 of a hopper, the upper edges thereof are anchored by means of bolts 34 to two bars 36 which are fixedly joined to the above-mentioned horizontal partition 26 parallel to the opening 28.
  • a vacuum-tight lid 38 hinged at 40 to the fixed structure of the mixer closes the inner space of the metering device.
  • the two sides 30 and 32 of the hopper terminate in a closing cylinder 42 which extends longitudinally over the entire length of the metering device and is supported at the two ends by suitable support brackets, being also connected to drive means (not shown) suitable for causing the cylinder to perform controlled rotations, usually of the order of 180°.
  • each cylinder 42 Formed at regular intervals in the outer surface of each cylinder 42 are blind cavities 50 which are distributed along the length of the cylinder and are offset alternately by 180°. Thus, the cavities 50 are alternately turned towards the inside of the hopper and towards the mixing chamber.
  • the cover 18 of the mixer is associated with four metering devices 20 (cf. Figure 1) which are mounted in such a manner that the respective distributor cylinders 42 are parallel but offset laterally relative to the blade-carrying shafts 12 and 14 of the mixer.
  • Figure 4 shows separately the distributor cylinders 42 of the two metering devices to be associated with the shaft 14, and it is therefore possible to see the arrangement of the cavities 50 which are identified by the letters A, B, C, D; E, F, G, H.
  • Figure 4 shows the two shafts 12 and 14 of the mixer with the respective blades, identified by the Roman numerals from I to VIII.
  • shaded circles and the corresponding letters indicate the positions of the cavities 50 turned towards the mixing chamber when the two distributor cylinders 42 are in the position shown in the lower portion of the Figure.
  • stage (6) it is important to observe that the synchronism between the axes of the bladed mixing shafts 12, 14 and the metering cylinders 42, and also the position of the cavity 50, are controlled in such a manner that the colouring agent does not fall onto the blades but onto the mixture.
  • the present invention achieves the aims initially set with other additional advantages, such as; for example, the fact that the initial charging of the metering devices 20 enables additives to be added to the mixtures of a number of blocks before they are re-filled or topped up.
  • the cylinder 42 may be associated with a mechanism suitable for applying periodically (for example each time discharge takes place from the cavity to the mixing chamber) a vibrating movement or a succession of gentle shakes.
  • the metering device maintained under a vacuum in the preferred embodiment of the invention it is ensured, on the one hand, that doses of colouring agent are introduced in controlled positions for achieving controlled aesthetic effects, and the blocks. obtained, once cut into slabs, have distinctly more pleasing aesthetic : effects (colour veining and the like) without causing any drawbacks on the cycle time for the produetion of the blocks.
  • a metering drawer mounted at the base of the hopper component of the metering device and movable between a position in which a cavity for receiving colouring agent is in communication with the base of the hopper, and a second position in which the cavity is in communication with the mixing chamber of the mixer.
  • a drawer may, for example, comprise a parallelepipedal element provided with a cylindrical through hole and with two slidable covers, which close the two ends of the hole and which are openable alternately in accordance with the position occupied by the slide valve:
  • the present invention has been described in relation to two specific elements, that is to say, the mixers used in installations for the production of blocks of stone material and the addition of colouring agents.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Artificial Fish Reefs (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Fertilizers (AREA)
EP99201970A 1998-07-07 1999-06-18 Mixer for manufacturing blocks of stone material Expired - Lifetime EP0970790B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTV980023U 1998-07-07
IT1998TV000023U IT245517Y1 (it) 1998-07-07 1998-07-07 Mescolatrice per impianti per la fabbricazione di blocchi di materialelapideo.

Publications (3)

Publication Number Publication Date
EP0970790A2 EP0970790A2 (en) 2000-01-12
EP0970790A3 EP0970790A3 (en) 2001-10-17
EP0970790B1 true EP0970790B1 (en) 2004-02-04

Family

ID=11420345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99201970A Expired - Lifetime EP0970790B1 (en) 1998-07-07 1999-06-18 Mixer for manufacturing blocks of stone material

Country Status (5)

Country Link
EP (1) EP0970790B1 (xx)
DE (1) DE69914539D1 (xx)
ES (1) ES2213976T3 (xx)
IT (1) IT245517Y1 (xx)
TR (1) TR199901566A2 (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3095768A1 (en) 2015-05-22 2016-11-23 Enrok Surfaces, Sl Artificial stone slab comprising veins and method of making the same
US11845198B2 (en) 2015-01-30 2023-12-19 Cambria Company Llc Processed slabs, and systems and methods related thereto
US11845235B2 (en) 2014-08-19 2023-12-19 Cambria Company Llc Synthetic molded slabs, and systems and methods related thereto

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20010130A1 (it) 2001-09-24 2003-03-24 Luca Toncelli Procedimento per la fabbricazione di manufatti lapidei in particolarelastre ad effetto venato
ITTV20050067A1 (it) * 2005-05-19 2006-11-20 Luca Toncelli Procedimento ed impianto per la fabbricazione di manufatti in blocchi di conglomerato di materiale lapideo.
WO2014108582A1 (es) 2013-01-11 2014-07-17 Cosentino Research And Development, S.L. Artículos de aglomerado de piedra artificial estratificados
CN108905857B (zh) * 2018-08-07 2021-09-24 吕志超 一种用于电力系统电力柜的纳米玻璃钢面板材料制备机
CN108818944B (zh) * 2018-08-28 2023-09-29 连云港海上山建筑设计有限公司 工作效率高的预拌砂浆搅拌装置
CN110076906B (zh) * 2019-05-10 2020-02-28 常晓娟 一种混凝土搅拌站搅拌系统
US12030260B1 (en) 2020-01-02 2024-07-09 Cambria Company Llc Stone slabs, systems, and methods
CN112173744B (zh) * 2020-09-25 2022-03-25 三一汽车制造有限公司 搅拌设备的控制方法、搅拌设备和存储介质
CN113442287B (zh) * 2021-05-21 2023-01-06 惠州市金鑫丰金属材料有限公司 一种采用交叉混匀式无机非金属浮体材料制取装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB392007A (en) * 1932-06-27 1933-05-11 Fuller Co Improvements in feeding devices for powdered or granular material
US2516436A (en) * 1944-11-28 1950-07-25 Walker Lionel Mixing of granular material with liquids
DE2532184A1 (de) * 1975-07-18 1977-02-10 Meyer Maschinen Und Wiegeappar Vorrichtung zum dosieren von einzelkomponenten unterschiedlicher form und beschaffenheit einer komponentenmischung in einem mischer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11845235B2 (en) 2014-08-19 2023-12-19 Cambria Company Llc Synthetic molded slabs, and systems and methods related thereto
US11845198B2 (en) 2015-01-30 2023-12-19 Cambria Company Llc Processed slabs, and systems and methods related thereto
EP3095768A1 (en) 2015-05-22 2016-11-23 Enrok Surfaces, Sl Artificial stone slab comprising veins and method of making the same
WO2016189377A1 (en) 2015-05-22 2016-12-01 Enrok Surfaces, Sl Artificial stone slab comprising veins and method of manufacturing same
EP3297969B1 (en) 2015-05-22 2020-08-26 Silicalia, Sl Artificial stone slab comprising veins and method of manufacturing same

Also Published As

Publication number Publication date
ITTV980023U1 (it) 2000-01-07
ES2213976T3 (es) 2004-09-01
DE69914539D1 (de) 2004-03-11
IT245517Y1 (it) 2002-03-22
EP0970790A3 (en) 2001-10-17
EP0970790A2 (en) 2000-01-12
TR199901566A2 (xx) 2000-02-21

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