SU1073101A1 - Spatial forms for moulding articles with inclined walls - Google Patents

Abstract

1. BOLT FORMWORK FOR FORMING PRODUCTS WITH INCLINED WALLS, containing a base, outer boards, a movable liner with a bottom tray that supports it and a stripping drive, characterized in that, in order to improve the quality of molded products, it is provided with a flat plate installed on the outer horizontal the wall of the liner with the possibility of vertical movement. 2. The formwork according to claim I, wherein the plate is fixed to the base by means of spring-loaded pins, and the horizontal wall of the insert is made with openings through which the pins are passed. (L

Description

one

The invention relates to the molding of products from hardening materials and can be used for the manufacture of structures such as baths with sloping side walls, mainly from materials that have a large shrinkage during solidification, for example, from polymer concrete.

A formwork is known that provides the mobility of the inner shields during the shrinkage of the formable material due to the 4-section liner, between the sections of which the pneumocylinders 1 are placed.

The lack of formwork lies in the fact that such a construction of the liner complicates its manufacture and does not provide a Forced detachment of the inner liner from the surface of the hardened product.

Closest to the offer is a formwork consisting of external boards, an inner liner, a pallet, and a pull-off mechanism and liner. The formwork is intended for the manufacture of volume elements with inclined walls. In the manufacture of products from shrinkage materials, such as polymer concrete, in the process of solidification, it is necessary to loosen the inner liner, for example, to lower it to form gaps between the liner and the walls of the product to compensate for shrinkage 2.

When the liner is lowered, a gap is formed between the bottom of the product and the horizontal wall of the insert, which is so much larger than the gap between the side walls of them, i.e., a gap sufficient to compensate for shrinkage, which may cause deformation of the bottom of the product, which has not yet hardened and not gained strength.

The purpose of the invention is to improve the quality of molded products.

This goal is achieved by the fact that three-dimensional formwork for molding articles with inclined walls, comprising a base, external boards, a movable liner with a bottom plate that surrounds it and a stripping drive, is provided with a flat plate mounted on the external horizontal wall of the insert with the possibility of vertical movement.

It is advisable to fasten the slab to the base with spring-loaded pins, and perform the horizontal wall of the liner with openings through which the plugs are passed.

FIG. 1 shows the formwork assembly; side view; in fig. 2 — node I in FIG. one; in fig. 3 - formwork with a compensation gap.

The formwork contains a pallet 1, a movable liner 2, an outer side 3, an insert movement actuator 4 and a plate 5 placed on the horizontal wall of the insert 2, which are located on the outer side 3.

The liner 2 has holes in the horizontal wall through which the plugs 6 with springs 7 wound on them. A plate 5 is rigidly fixed to the bolts x 6. Around the holes in the horizontal wall of the liner 2 are placed 2 push-in sleeves 8.

5 Pins b are provided with limit stops 9, which interact on one side with springs 7, on the other - with pressure sleeves 8.

Bulk demolition works as follows.

Before casting, the formwork is lifted and the outer boards 3 are fixed, then with the help of the actuator 4 of movement of the liner 2 they lift the latter to the extreme upper position. Plate 5 rests on the horizontal wall of the liner. The assembled formwork is poured with molding sand, compacted and steamed. During intensive volumetric shrinkage of the material by turning on the actuator 4, the liner 2 is lowered vertically down to the required distance.

0 In this case, a gap is formed between the inclined walls of the liner 2 and the walls of the molded product, which ensures the shrinkage of the internal volume of the product. Plate 5 due to the force of the springs 7 remains in the upper extreme position and supports the bottom

molded product, preventing the deflection of the still uncured product.

After the final solidification of the product, the outer boards 3 are exposed.

0 formwork and with the help of the actuator 4 lower the liner 2. At the same time, the liner 2 bushings 8 plugs b and, opposing the force of the springs 7, moves the plugs 6 vertically down, and with them the slab 5, detaching it from the bottom of the product.

This formwork, having a simple construction, makes it possible to compensate for the change in volume during shrinkage of the material, ensuring a high quality of the molded product.

1073101

Claims (2)

1. VOLUME FORMWORK FOR FORMING PRODUCTS WITH TILTED WALLS, comprising a base, external sides, a movable insert with a pallet encircling it and a formwork drive, characterized in that, in order to improve the quality of the molded products, it is equipped with a flat plate mounted on an external horizontal wall insert with the possibility of vertical movement. 2. Formwork according to π. 1, characterized in that the plate is fixed to the base by means of spring-loaded pins, and the horizontal wall of the liner is made with holes through which the pins are passed. SU ,, 1073101