SU1159784A1 - Void former - Google Patents

Abstract

1. EMPHASISPORT containing hollow body with retractable valves mounted on it and the mechanism of their movement in the radial direction, characterized in that, in order to reduce labor costs in the manufacture of hollow concrete products with slotted holes arranged radially and communicating with the hollow channels, it is equipped with movable, 4 r3828о 23 1 6V7 along the longitudinal axis of the hollow body with a shank attached to it by means of a bracket with a cam, retractable valves - rods, hollow body with a pole Shaft inside it and parallel to its longitudinal axis with a shaft with a rod for arms and a driver for a copier, as well as with a lock of a movable shank mounted outside the hollow body. 2. A shaper according to claim 1, characterized in that the latch of the movable shank is made in the form of a sleeve with an axis, at one end of which a bar is rigidly fixed, at the other - a lever with counterload, and an axis in contact with the bar is mounted on the movable shank. 3. A blowing agent according to Claim 1, characterized in that the movable valves are spring-loaded. (L 4. Straightener according to claim 1, characterized in that a limiting stop is mounted on the hollow body for fixing the hollow former in -form. / 01 co oo 32 Fig. 1 Jff 18 fS

Description

The invention relates to molding equipment for the production of concrete and reinforced concrete products. The purpose of the invention is to reduce labor costs in the manufacture of hollow concrete products with slotted holes arranged radially and in communication with the hollow channels. FIG. 1 shows a core former, partial section, side view; in fig. 2, view from above; in fig. 3 shows the node I in FIG. 2; in fig. 4 shows section A-A in FIG. 2; in fig. 5 is a section BB in FIG. 2; in fig. 6 is a sectional view BB in FIG. 3; in fig. 7 - section G-Y in FIG. 3; in fig. 8 is a view of D in FIG. 3; in fig. 9 shows section EE of FIG. 8. The hollow core contains a hollow body 1 (Fig. 1) and a movable shank 2. The hollow body 1 has holes 3 with longitudinal grooves 4, a support 5 (Figs 2 and 3), openings 6 in which the guides 7 are rigidly fixed brackets 8. Brackets 8 are made with coaxially round holes 9 (Fig. 4 and 5). The brackets 8 are fixed to a support 10 with an opening 11. Opposite the openings 6 in the hollow body 1 there are windows 12 in which the covers 13 with screws 14 are installed. In the openings 6 retractable valves 15 are located, to which the rods 16 are fixed with an opening 17 on the free end. The props 16 rods 16 through the holes 11 of the supports 10. A spring 18 is attached to the rods 16, abutting the upper plane 19 of the support 10. Seals 20 are provided to eliminate the gaps between the guides 7 and the sliding valves 15. The movable stem 2 has a base 21 and side walls 22. The base 21 is rigidly fixed on one side with an earring 23 for connecting to a horizontal movement actuator 24, such as a cross bar for the void-forming installation, on the other, a bracket with a copier 25 in which guide groove 26 is made (Fig. 6). The side walls 22 of the movable shank 2 have openings 27. 8 holes x 27 and slots 4 are provided with axes 28 and 29 fixed from longitudinal movement by retaining rings 30. Axis 29 has a tapered shank 31, the slope angle of which is less than the friction angle. Inside the hollow body 1, a shaft 32 is installed parallel to its longitudinal axis, which passes through the holes 9 of the brackets 8 and through the hole 33 (Fig. 7) of the support 5. Levers 34 are rigidly fixed to the shaft 32 with grooves 35 and a leash 36, which fits into the guide the groove 26 of the copier 25. A hole 37 is installed in the hole 17 of the rod 16, which passes through the grooves 35 of the levers 34. To fix the movable shank 2 on the hollow body 1, the locking pin 38 is mounted on the eyelet 3, which stitches the sleeve 39 (Fig. 8 and 9), rigidly fixed on the eye 3, with a hole 40 in which on the axis 41. A bar 42 and a lever 43 with a counterweight 44 are attached to the ends of the axis 41. A stop 45 is installed on the hollow body 1, limiting the insertion of the hollow core into the mold 46, intended to form a hollow concrete product 47 with slotted holes 48 radially positioned and connected with a hollow channel 49. A removable vibration-loading shield 50 is mounted on the mold 46. A deflecting ruler 51 for the lever 43 is fixed on the foundation. The vacuum sinter operates as follows. Before forming the product 47, the void former is placed in the mold 46 in the working position (FIG. 1). In this case, the abutment 45 rests on the wall of the mold 46, the sliding valves 15 are in the extreme upper position. Moving the shank 2 is in relation to the hollow body extreme front position (Fig. 2 and 3). The lever 43 with counterweight 44 is retracted from the vertical position of the deflecting linear 51 (Fig. 9). After pouring the concrete solution onto the mold 46, a vibration-loading shield 50 is installed and the concrete is compacted. Then, by pulling the rod 24 onto the shackle 23, the extraction of the hollow core from the molded article 47 begins. Due to the fact that the hollow body 1 is compressed by compacted concrete, considerable effort is required to move it. Therefore, at first, the hollow body I remains stationary, and only the movable shank 2 moves under the influence of the traction body 24. In this case, the axes 28 and 29 slides in the longitudinal grooves 4 of the lugs 3. Together with the movable shank 2 the copier 25 moves with the guide groove 26 ( Fig. 3 and 6, dash-dotted lines). When moving, the guide groove 26 turns the lead 36 (fig. 6 and 7) located in it, the dash-and-dot lines), which then rotates the shaft 32. Together with the shaft 32, the arms 34 are rigidly attached to whom, with their groove 35 act on the check 37, move the rods 16 and the valves 15 rigidly connected with them along the openings 6 of the guides 7 in the radial direction into the interior of the hollow body 1 (Fig. 4 and 5, dash-dotted line), while the spring 18 is compressed. After the valves 15 are lowered into the interior of the hollow body 1, the axes 28 abut against the end of the grooves 4 (Fig. 6, dash-dotted line). Subsequently, a joint horizontal movement of the movable stem 2 and the hollow body 1 occurs. Together with the hollow body 1, the latch 38, which is installed on the eye 3, also moves. At the same time, the lever 43 slides along the deflection ruler 51. After leaving the contact with the deflection ruler 51, the lever 43 under the action of its own weight and the weight of the counter-load 44 fixed on it is rotated in the sleeve 39 together with the axis 41 and the bar 42. The bar 42 is installed in front of the conical shank 31 of the axis 29 (Fig. 9, dash-dotted lines) and fixed movable shank 2 with a hollow body I. After removing the hollow core from the molded product 47, hollow channels 49 formed by the hollow body 1 and radially communicating with them slit openings 48 remain in it. The vibration absorbing plate 50 is removed, and the mold 46 together with the product 47 is transported to subsequent technological posts.

In the removed core former, the retractable valves 15 remain recessed in the core body 1, since they cannot exit the openings 6 under the force of the compressed spring 18 due to the fact that the shaft 32 is kept from turning by the lead 36 located in the copier 25.

The void former is introduced into the mold 46 prepared to form article 47 as follows.

When acting on the shackle 23 of the actuator 24, the horizontal movement of the E: the sliding shank 2 cannot move relative to the hollow body 1 along the grooves 4, as the taper shank 31 along the axis 29 abuts against the bar 42 of the retainer 38. Therefore, first the joint movement of the movable shank 2 and hollow body 1. After the hollow body 1 enters the mold 46 by such an extent that the sliding valves 15 will be shaped 46, the lever 43, interacting with the deflecting linear 51, rotates together with the axis 41 and the bar 42. When this planha 42 out of contact with the conical axis 29 of the shank 31, ie. e.

Moving the shank 2 with the hollow body 1 is unfixed. Now the movable shank 2 moves relative to the hollow body 1 until the axes 28 and 29 are pushed into the front ends of the grooves 4. When the moving shank 2 moves, the copier 25 fixed on it moves with the guide groove 26. Moving, the guide groove 26 swings the lead 36 on it. 0 Together with the lead 36, the shaft 32 turns and the levers 34 rigidly attached to it, which at the same time extend the rods 16 with their grooves 35, and valves 15 which are rigidly connected with them through the openings 6 of the guides 7 from the empty body 5. After the contact 45 stops with the wall of the mold 46, the movement of the voids forming stops. Mold 46 is prepared for molding article 47.

Q The valves 15 in the working position (on the form 46 there is no vibration-loading shield 50) extend in height beyond the dimension 47. When mounted on the mold 46 of the vibration-loading shield 50, it weighs the valves 15 with a weight flush with the outer surface of the product 47. At the same time, it turns slightly and guide 36. To ensure some rotation of the driver 36 without moving the movable shank 2 to the end of the guide groove 26, the broadening is made. The spring 18 provides for constant contact between the valve 15 and the vibration loading shield 50 during the vibration process, which eliminates the leakage of the concrete solution to the contact point and contributes to obtaining slotted radial holes 48 with clear edges. After the vibratory compaction is completed, the core former is removed. The extraction process is described above.

The use of the hollow core of the proposed design allows to reduce

labor costs in the formation of slotted holes, which communicate radially with the hollow channels, by using only one actuator and obtaining high-quality slotted holes that do not require subsequent fine-tuning.

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Claims (4)

1. VOID FORMER, containing a hollow body with retractable valves mounted on it and a mechanism for moving them in the radial direction, characterized in that, in order to reduce labor costs in the manufacture of hollow concrete products with slotted holes located radially and communicating with the hollow channels, it is equipped with a movable along the longitudinal axis of the hollow body with a shank mounted on it by means of a bracket with a copier, retractable valves with rods, the hollow body inside it and parallel to the longitudinal axis of the shaft with lever and rods under the leash at the copier, and the movable retainer shank mounted outside the hollow body. 2. A pore former according to item I, characterized in that the movable shank retainer is made in the form of a sleeve with an axis, on one end of which a strap is rigidly fixed, a lever with a counterweight is mounted on the other end, and an axis in contact with the strap is mounted on the movable shank. 3. Void formers according to π. 1, characterized in that the movable valves § are spring-loaded. 4. Void formers according to π. 1, characterized in that on the hollow body mounted restrictive stop for fixing the core in the form. SU 1159784 y / (11) ______________________ 23 1 46 FIG. 1 I 159784