JPS6316072A - Method for coating corrosion resistant hume concrete pipe - Google Patents

Abstract

PURPOSE:To efficiently perform painting imparting a uniform film thickness and generating no dripping of a coating material by the same equipment, by utilizing rotary centrifugal force during a Hume concrete pipe manufacturing process and applying and bonding a desired compound under pressure immediately after molding and curing work. CONSTITUTION:The molding and curing of a Hume concrete pipe are performed under rotary centrifugal force pressure and, immediately after this work and prior to entering steam aging, a specific resin compound is applied to the inner surface of the undried Hume concrete pipe under said rotary centrifugal force pressure at the same place. In this case, the resin compound consists of an epoxy resin, water molecule substituted self-emulsifiable aliphatic amine and cristobalite type fine powdery mixed inorg. quick setting cement. Thereafter, when the curing of concrete and that of the resin are simultaneously performed by steam aging, a manufacturing process, an aging time and a working place are reduced to a large extent and cost reduction can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of wrapping resin to prevent the inner surface of a humid pipe.

(Conventional technology) Conventionally, the manufacturing method for corrosion-resistant humid pipes was to incorporate a cylindrical steel frame into a steel pipe shape, perform rotary centrifugal force forming of hardened cement, perform steam curing, remove the formwork, and after complete drying. We have manufactured anti-corrosive paints by applying them with a trowel or curing them and curing them.

(Problem that we are trying to solve) In the conventional method, there are two heat curing steps: S fume pipe steam curing, paint application hardening curing, and N transport and two times because the locations are different.
It required twice the amount of land, took time and effort, and had many problems.

(Means for Solving the Problems of the Present Invention) The present invention provides an inorganic resin containing an epoxy resin, a water molecule-substituted self-emulsifying aliphatic amine, and a cristobalite fine powder mixed immediately after the molding and curing operation by rotating centrifugal pressure during the hume tube manufacturing process. A method in which cement is mixed and adhesively applied to the inner surface of the undried hume tube, and rotational centrifugal force during the hume tube manufacturing process is used to assist and press the resin, making the coating thickness uniform and applying it. The method of applying the resin prevents the resin from dripping.

According to the method of the present invention, after the molding and hardening of the fume pipe and before steam curing, the above-mentioned special epoxy resin compound is bonded to the inner surface of the undried fume pipe without transporting the fume pipe at the same place. By applying Z, you can save transportation, space, and time. In addition, by using the humid tube manufacturing machine as is, it is possible to assist in resin application, i.e., since the object to be coated is rotating, the coating tip only needs to move in one dimension, and the coating film can be made uniform. It has the feature that the applied resin can be crimped and prevented from dripping by rotating centrifugal force pressure.

More importantly, the steam curing time for humid pipe concrete is shortened by the special epoxy citron oil coating that is related to water molecules, and there is no time saving in that the concrete and resin can be cured at the same time through steam curing.

(Example) Immediately after the rotary centrifugal force pressure curing operation during the hume pipe manufacturing process, one piece of L, which is one of the blended inorganic quick setting cements mixed with epoxy resin, water molecule-substituted self-emulsifying aliphatic amine, and cristobalite fine powder Ebonitsuke EP #910 manufactured by Chemical Construction Co., Ltd. was applied by spraying one-dimensionally into the interior of a rotating humid tube. The thickness is about 30
The thickness was 0 micron, there was almost no dripping, and the adhesion was good and evenly coated by pressure bonding with one revolution of centrifugal pressure. After that, the concrete and resin are cured with steam, and the time for curing is considerably shortened compared to the conventional method.
F, 0i8f The process, curing period, and work area are almost the same as those for general humid pipes, so the preparation process, curing period, and work space for corrosion-resistant humid pipes are about half, and the manufacturing cost is reduced. I was able to devalue it to a large extent.

Claims (2)

[Claims] (1) Immediately after the rotating centrifugal force pressure curing process during the fume tube manufacturing process, epoxy resin, water molecule-substituted self-emulsifying aliphatic amine, and inorganic quick-set cement mixed with cristobalite fine powder are mixed and bonded to the undried inner surface of the fume tube. How to perform the application. (2) A resin coating method in which resin coating is assisted and compressed by rotational centrifugal force during the fume tube manufacturing process, and the coating thickness is made uniform and the applied resin is prevented from sagging.