SU1726270A1 - Finger joint of a mould for manufacturing of tubular items from concrete mixtures - Google Patents

Abstract

The invention relates to the production of tubular products from concrete mixtures. The purpose of the invention is to increase reliability by eliminating shape deformation. This is achieved in that the locking connection of the form contains a proppant in the form of coaxially opposed locking pins with centering cones and rods carrying them, which are connected to each other by a driving drum, and extreme and middle eyelets with holes mounted on the half-form bandages. The centering cones are fixed in pairs, symmetrically with respect to the rods by means of cross-arms and mounted with the possibility of adjustment in the longitudinal plane, while the proppant is placed on one of the adjacent longitudinal edges of each half-form. 8 il.

Description

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The invention relates to the production of tubular products from concrete mixtures.

The purpose of the invention is to increase reliability by eliminating shape deformation.

Fig. 1 shows a mold for the manufacture of tubular articles with a locking connection, a general view; figure 2 - section aa in figure 1; on fig.Z - view B in figure 1; figure 4 is a view In figure 1; figure 5 is a section of GG in figure 1; figure 6 is a node I in figure 5; figure 7 - section dD in figure 6; Fig.8 is a section of the EE in Fig.2.

The locking connection of the form consisting of half-molds 1 and 2 includes a wedging device in the form of coaxially opposed rods 3, on which they are fixed in pairs and symmetrically with respect to the rods 3 by means of traverse 4 centering cones 5, a rotary drum 6 connected via an asterisk 7 to the drive 8 through chains 9 and blocks 10. The drum 6 is threadedly connected to the rods 3 with right and left threads.

Half-molds 1 and 2 have longitudinal ribs 11 and 12 and box-shaped bandages 13. On bands 13 of one of the half-molds, there are middle lugs 14 with notches 15 for rods 3 and holes 16 for centering cones 5, and on the bands of the other half-form - end-eyes 17 s the holes 18 for the rods 3 and the centering cones 5. The holes for the centering cones 5 are made conical. The outermost lugs 17 are mated with the wedge plates 19 using the pads 20 and 21 and screws 22 and 23. The wedge surfaces of the plates 19 form a wedge groove 24. On the middle eyelet 14, the oppositely directed wedge

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surfaces 25. In the adjoining ribs 11 and 12, grooves 26 are made along the entire length, in which a shock absorber is packed — seal 27. Wedge-type copiers 28 are mounted on the ribs 11 and 12. The middle lugs are fixed with screws 29.

The locking connection of the form is carried out as follows.

The bottom mold 2 is installed in the cradle 30 of the stand 31 for assembling and demolding the molds. The upper half of the mold 1 is installed on the lower half of the mold 2 so that the middle lugs 14 fit into the wedge grooves 24 of the bandages 13. In this case, the traverse 4 rests on the wedge surface of the copiers 28, due to which there is a uniform gap along the entire length of the half-molds. The drums 6 are rotated in the bearings 32 by means of drives 8 mounted on the stand 31 using chains 9 and an asterisk 7. Turning the drum 6 will cause the hose 3 having left and right threads to move in opposite directions. When this occurs, the traverse 4 moves along the wedge 28 and smoothly moves downward without tilting the upper half of the mold 1 to the lower 2 under the action of its own weight, and the rods 3 and the centering cones 5 pass into the corresponding holes 16 and 18. In the case of gaps between the centering cones 5 and lugs adjust the length of the centering cones 5 by means of nuts 33. Then the position of the rods 3 is fixed by lock nuts 34. The assembled shape is fed to the following technological posts.

For stripping, the form with the product is installed in the lodgment 29 of the stand 31 so that the sprockets are on the same axis with the drives 8, by means of which reversing occurs with the help of chains 9

turning the drum 6. In this case, the rods 3 move towards each other. The centering cones 5 emerge from the holes of the extreme 17 and middle lugs. The movement of the rods 3 continues, in which the yoke 4 interacts with the wedge surface of the copier 28. The upper half-form 1 moves to a certain height. There is a complete exit of the middle lugs 14 from the wedge grooves 24 of the tires 13, which allows removing the upper mold half and removing the product. For manual rotation of the drum 6, an opening 35 is provided.

The locking connection of the form allows you to create a rigid connection between the bandages and the longitudinal edges of the form, not allowing its deformation.

Claims (1)

Claims of the inventive locking connection for the manufacture of tubular concrete products containing a proppant device in the form of coaxially opposed locking pins with centering cones and their supporting rods connected to each other by a driving drum and mounted on transverse bands of the half-shaped eyelets with holes for centering cones , characterized in that, in order to increase reliability by eliminating the shape deformation, the centering cones are fixed on the rods in pairs, symmetrically about relative to the latter by means of cross-arms and mounted with the possibility of adjustment in the longitudinal plane, the wedging device is placed on one of the adjacent longitudinal edges of each half-form, while on the bandages of one half-form there are fixed eyelets with a notch for the rod, on the bandages the other are extreme relative to the middle eyelet with an opening rods. gd FIG. five