SU1502351A1 - Method of moulding vibrohydroformed tubular articles - Google Patents

Abstract

The invention relates to the production of precast concrete and reinforced concrete products and allows for improving the quality of the products and reducing the manufacturing time by combining the heat treatment process with the impregnation process. For this purpose, in the method of forming vibro-hydro-pressed tubular products, prior to installation in the outer form of the reinforcement, working surfaces of the forming elements in contact with the outer protective layer of the product are applied by spraying a layer of low-melting clogging composition. Before applying the composition is heated to 42-180 ° C. The thickness of the applied layer is 0.04 to 0.14 of the thickness of the outer protective layer.

Description

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

The purpose of the invention is to improve the quality of products and reduce production time by combining the heat treatment process with the impregnation process of the outer protective layer of the product.

The essence of the method of manufacturing vibro-pressed pipes is as follows.

Assembling the outer mold, installing the fittings, fastening the anchor and gage rings, forming the pipe, hydraulic pressing, heat treatment and demolding. Prior to installation, the working surfaces of the forming elements in contact with the outer protective layer of the product are applied to the working surfaces of the forming elements, and a low-melting clogging composition preheated to 42–180 ° C is applied by a spreading method, the thickness of which is 0.04–0.14 thick. a protective layer of the pipe and which during the heat treatment process permeates the surface layer of hardening concrete.

The proposed method is applicable in the manufacture of pipes with spiral and spiral-cross reinforcement.

Make pipes with a diameter of 1200 mm of the 11th class with spiral (traditional) reinforcement.

Example 1. At the post of reinforcement works, the harvesting of merging material was carried out.

IS

I. l g tgrzhngy iipi.i; uiMh4ni. ipKnTvphi d,) P1M1p | S Ui / t П, j MM, у.: IiMi., IMHaiiiu- Hx, Ulк (, и, ч. ч.ят Hbit-iii yrui .vrnniuyuchpmklkami, nbir. I; i, Ky on to m : tsakh

gthiergy .THKL puhix g okok, n ;; t; op kit gteryzhiya pa one TpyHv, vpchtlmyguvku ra - :( DR-1Itelny pnpg., H3riiTop; ioi Hf G11ir lm mine carcasson.

1 (1ГЛР р; 1- Borky forms of its elogue

from the concrete. The inner surface of the nofuels, kalnb- i winero KO4Tiin cho: r pack1t kolmptruyuschu co (: ta; u). What can be, for example, warming paraffin mixed with pure non-recovered oil in the ratio i: 3 (for one part of oil ПЯТ1 ;, parts of paraffin). A container T of tank is prepared, under the bottom of which a heating element is located. The container is filled with pieces of paraffin, the bay1 1T there is spindle oil in accordance with the proportions

and bring the mixture to 42 ° C. Application

the composition is carried out with a spray gun, into which the molten mixture is supplied by means of a compressor. The thickness of the layer of composition on the inner surface of the mold is 0.5 mm, which is 1–: 0.04 times the thickness of the outer protective layer. Ioluforms are transported to the assembly post, where they are connected to each other with spring bolts and secured with a gauge. iia times stick tape. The longitudinal reinforcement is installed together with the lower ank (the upper ring is attached to the form) and the upper longitudinal reinforcement is attached to the outer form. at the post of vibroforming, where the concrete mix is filled in with a siu compacted with mounted vibrators. Forming time is 60-65 minutes. Later, the mold filled with the mixture is applied (tons per post (pressing and heat treatment. Pressing concrete estvl is at a pressure of 2.6 MPa.

After the specified pressure is reached, heat treatment is carried out on the pipes at 90-93 ° C. Under the action of temperature and pressure, the composition melts and fills the dry surface layer of hardening concrete; , deca its waterborne ai -) M:, ill 01 .1 | 1ca 1i tsmtlovoy obra (and g g) races iH.iiivr oypressovovoe pressure. ii / iiHi ,, remove the form from the core and Yerschus t on the shells of the casing, where the head produces longitudinal arma1 ypi.i, removing the lower and upper anchor elbows, unwinding the springs of the fibix bolt (P), removing the upper half-form and kibrui kolt.pa, extraction of a pipe from a form. Then, at the calibration post of SHLIFCH10T, the socket of the pipe to the designed dimensions is 1.1x and the finished pipe is used up to 1.11) on the}} one-sidedness of the internal hydraulic pressure. After T1 testing, it is transferred to the finishing station, where the anticorrosive compound is coated with the exit points of the longitudinal reinforcement bars, the end portions of the pipe1,1 and the locations of the 1-form wiper (schw), which are covered with adhesive tape during the manufacture.

Example 2. The clogging composition is heated to and applied to the surface of a mold with a thickness of 2 mm, t-0.14 is the thickness of the outer protective layer. At this temperature, the clogging composition is well applied and evenly covers the 1-lining surface. The order of techno-logical operations remains unchanged.

Claims (1)

Invention Formula The method of forming vibrohydropressive tubular products, including installation on the core with an elastic cover of the outer form with reinforcement laid in it, feeding concrete mixture under vibro-action, hydropressing and heat treatment, in order to improve the quality of products and reduce } 1 and the time of production by combining the heat treatment process with the process of impregnating the outer layer of the product, re-installing the reinforcement in the shape of the reinforcement on the working surfaces of the forming elements, to contacting with the outer protective layer of the product, sprayed a layer heated to 42-180 (low-melting clogging composition, the thickness of which is 0.04-0.14 tolqine of the outer layer of the product.