Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1988-03-01
1989-08-01
Silbaugh, Jan H.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264261, 2491141, 425123, 425126, B29C 3100
Patent
active
048531669
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for successive production of block members, especially lightweight concrete blocks, by assembling at least two mutually separated block elements by means of an intermediate filling of binding material, preferably of heat insulating foam material, which method is of the type wherein the block elements are placed opposite each other on a carrier plate which is included in a segmented conveyor comprising a preferably endless row of such carrier plates which are forwarded past a filling station at which the said filler material is placed between the block elements by molding out the space between the blocks or by supplying a foaming and hardening material thereto, the carrier plates being forwarded together with outwardly projecting end mould plates which engage the opposite ends of the block elements and by the passage of a bent or arched reception section of the conveyor are mutually diverging such that in this section it is easy to place the block elements on the carrier plates, while the end mould plates by further movement along a straight or less arched portion of the conveyor path assume their said block end engaging positions.
Such block members are very advantageous for use in the construction industry, as they are usable for building double-brick walls with an interior layer of a stable insulation material. The use of lightweight concrete elements with an interposed foam material, e.g. stiff polyurethane foam, may condition the block elements to be relatively large, whereby it is possible to build up a double-brick wall rapidly, which as an integral part will comprise the necessary wall cavity insulation which may even have a strengthening effect. The foam material may remain stable, i.e. without collapsing in the wall.
Hitherto such lightweight concrete building blocks have been produced in moulding boxes, in which the block elements are placed at the opposite ends of the box, and a foaming foam material is supplied to the space between the elements. The moulding box is made to fit tightly about this moulding space, such that the foam material is kept inside the concerned space, i.e. as far as possible without flowing onto the exterior surfaces of the elements, which, however, has proven difficult to avoid. This practically purely manual production method is difficult and costly, but the products are so advantageous that it has been realistic to use it.
From EP-No. A1-171,818 is known a method and a system for producing concrete block members of a similar type, in connection with which it is suggested to effect the production continuously in the manner generally referred to above. More specifically, carrier plates are used which form the said conveyor, and which are mutually separated by short carrier plates having another plate member projecting outwards therefrom at their middle. In the straight path portion of the conveyor the long and short carrier plates are placed in immediate extension of each other, and the block elements are received in the spaces between the successive outwardly projecting plate members, which may thus function as end mould plates. The conveyor consisting of the carrier plates is forwarded through a rather acutely bent path at a supply station for the block elements, whereby the rearmost long carrier plate in the straight portion of the conveyor is able to receive the block elements by a horizontal insertion of these from behind, the following short carrier plate being tilted so far downwards that its associated end mould plate is placed in a rearwardly and possibly slightly upwardly projecting position, in which its top portion is situated below the level of the long carrier plate such that the said mould plate will not obstruct the insertion of the block elements. This arrangement requires that the system operate in an intermittet manner, as it would not otherwise be possible at a reasonable operating speed to insert the block elements before the rearmost mould plate is swung upwards above the level at which the elements are supp
REFERENCES:
patent: 3615071 (1971-10-01), Harper
patent: 3964847 (1976-06-01), Redmer et al.
patent: 4098562 (1978-07-01), Levin
patent: 4529562 (1985-07-01), Connett et al.
patent: 4543052 (1985-09-01), Stevens
Andersen Bent S.
Therkildsen Jens
A/S Fibo
Kuhns Allan R.
Silbaugh Jan H.
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