SU1414649A1 - Mould for making prestrained concrete articles - Google Patents

Description

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This invention relates to the manufacture of precast concrete and reinforced concrete products.

The aim of the invention is to provide convenience of reinforcement and demoulding of a molded article.

FIG. G schematically shows; a form for the manufacture of prestressed concrete products from mixtures, a general view; in fig. 2 - section A – A in FIG. one; in fig. 3 - section-: bb-b in fig., 1 (at the moment when the fittings are terminated); FIG. 4 is a view B of FIG. 3; in fig. 5 is a sectional view: YYD in FIG. 3

The form for the manufacture of prestressed concrete products made of concrete mixtures consists of a pallet 1 with rigidly fixed I on it longitudinal dividing walls 2, fixed transverse I border 3 and anchoring stops 4 and 5, I forks 6 and movable bor 7. Fixed board 3 is made: a composite of the upper form-forming hinged on the pallet 1: the cover 8 and the end walls-9 rigidly attached to it. The movable sides 7 consist of the upper 10 and lower 11 parts with a horizontal connector located below the level of the tension fittings 12 and coinciding with the lower part of the boss 13, forming a recess on the produced pile 14. The upper 10 and lower 11 parts are articulated to the axles 15 fork 6, rigidly connected to the slide 16. The hook 6 is rigidly attached to the screw rod 17, passed through the anchor stop 4. The end of the tension reinforcement on the stop 5 and the end of the hook 6 on the stop 4 are protected by screens 18 and 19. In the end walls 9 top covers 8 non The movable flange 3 and end stacks 20 of the upper part 10 of the movable flanges 7 have grooves covering the tension fittings 12. The upper shaping mat 8 adjoins the inclined portion of the tip forming the tip of the pile 14 of the ducts at the ends of the longitudinal dividing walls 2.

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The mold for the manufacture of prestressed concrete products works as follows.

In the prepared (cleaned and lubricated) form, with the open positions of the upper shaping spindle 8 of the fixed side 3 and the upper 10 parts of the movable sides 7, the tensioned reinforcement 12 with anchor heads (collets) are placed into the slots of the lugs 5 and the power grips 6. After closing the bolts 8 and the upper parts 10 of the flanges 3 and 7, the reinforcement 12 is tensioned at the ends of the rifle 17 and fixed with stop nuts 21. When tensioned, the movable flange 7 together with the forks 6 slides on the slide 16 and moves to a value of 1 corresponding to the amount of sagging of the tensioned reinforcement 12 and its tension.

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After the formation of the piles and their heat treatment, the upper parts 10 of the movable sides 7 and the upper rims 8 of the fixed sides 3 are opened. The tension reinforcement 12 is cut and the piles 14 are removed from the shaping sections. To adjust the mold to the next molding, release the nuts 21 and move the beads 7 to the initial position.

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Claims (1)

35 claims A form for the manufacture of prestressed concrete products, containing a pallet with dividing walls and anchoring stops, associated with forks for tensioned reinforcement, movable and fixed transverse beads, characterized in that, in order to ensure ease of reinforcement and dismantling of the molded article , each movable transverse board is made of parts located one on another, pivotally mounted on forks, and the plane of the connector of the board parts is located below the level rebar reinforcement. 0 five 0 Fi.g 70 I 12 13 I R figl P Yr C) and. five W / 5