(19)
(11) EP 0 318 708 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.06.1990 Bulletin 1990/24

(43) Date of publication A2:
07.06.1989 Bulletin 1989/23

(21) Application number: 88118162.2

(22) Date of filing: 31.10.1988
(51) International Patent Classification (IPC)4: B28B 13/06, B28B 1/08, B28B 3/06
(84) Designated Contracting States:
DE FR GB

(30) Priority: 02.12.1987 IT 1259387

(71) Applicant: MICRON-WELDING S.r.L.
I-40050 Monte S. Pietro (IT)

(72) Inventor:
  • Castellari, Alberto
    I-40133 Bologna (IT)

(74) Representative: Porsia, Bruno et al
c/o Succ. Ing. Fischetti & Weber Via Caffaro 3/2
16124 Genova
16124 Genova (IT)


(56) References cited: : 
   
       


    (54) Process and machine for producing blocks of pressed vibrated concrete


    (57) Process and machine for producing pressed vibrated concrete blocks, providing for a suitable vertical displacement of the counter mould (3) in its block delivery step, whereby the blocks are delicately laid on the ground. The process comprises the steps of filling the moulds (1), lowering the counter mould (3), pressing and vibrating the concrete, opening the bottom of the mould (1) by removing the bottom plate (5), causing the moulded blocks (M) to be deposited on the ground (S) by lowering the counter mould (3) and lifting the mould (1). The machine is characterized by provisional limit stop means (18-20) so that the counter mould (3) can be lowered for pressing the concrete and during an extra stroke for putting the blocks (M') on the ground (S).







    Search report