RU2279412C1 - Plant for production of silica fiber - Google Patents

Abstract

FIELD: production of glass fiber materials; equipment for production of silica fibers resistant to high temperatures.

SUBSTANCE: proposed plant includes stapling machine connected with inclined cleaner by means of conveyer belt; inclined cleaner is provided with unit for transfer of loosened fiber to conveyer of continuous mixer. Conveyer is connected with hoisting bin of proportioner by means of swivel chute for loading the fiber in drum. Drum has perforated walls and individual automatic drive; it is mounted on strut. Drum is transferred to acid and rinsing baths and to re-loading unit of centrifuge by means of transfer arm. Centrifuge is provided with detachable tray equipped with fiber loosening grips. Feeder is provided with unit for transfer of fiber to continuous mixer conveyer kinematically linked with inclined cleaner which is connected in its turn with aerodynamic drying chamber by means of special device. Chamber is provided with conveyer belt for transfer of dry fiber to continuous mixer equipped with conveyer for delivery of fiber to pneumatic press through condenser for packaging in cardboard boxes.

EFFECT: increased productivity; improved quality of fiber; low cost of product.

3 cl, 1 dwg

Description

The invention relates to the production of fiberglass materials, and in particular to equipment for the production of high temperature resistant silica fibers used in various fields of science and technology as heat and electrical insulation, resistant to aggressive environments, environmentally friendly replacement of asbestos-containing heat-insulating materials.

A device for the production of silica fiber containing a bath placed in a protective casing and a container with perforated walls, the container is made with a hinged bottom wall and pivotally mounted on a lever (AS USSR No. 319560, class C 03 C 25/06, 1971).

It is also known a device for producing fiberglass silica materials (AS No. 1362721, class C 03 C 25/02, 12/30/1987), containing a hollow perforated mandrel (drum), on which a glass fiber mat is wound, placed in the working body (body), rotating during the processing of fiberglass materials with an acid solution and washing with water, while the acid and water solution is continuously supplied into the inner cavity of the drum uniformly over the entire width of the mat.

The disadvantages of these devices are low productivity, the complexity of winding uniformly across the thickness of the fiberglass mat layer on a perforated mandrel, the inability to process the cut fiber without preliminary preparation of the mat, the use of manual labor, the high complexity when loading and unloading the mandrel with fiber from the working body (case).

Known installations represent structural solutions of the main stage of the process - acid treatment of fiberglass materials.

The technical task of the present invention is to improve the installation and its elements, combining them into a single technological line to increase productivity, quality of silica fiber, reduce labor intensity, eliminate manual labor, reduce water consumption for washing the fiber and reduce production costs.

This goal is achieved in that the installation for the production of silica fiber includes a staple machine connected by a conveyor belt with an inclined cleaner equipped with a device for transferring the loose fiber to the conveyor of a continuous mixer, connected by a rotary tray to the lifting hopper of the dispenser with a spray device for loading fiber into the drum, made with perforated walls and equipped with an individual automatic drive, located on the training rack, transferred by the auto-operator to acid and washing baths arranged in series to a centrifuge reloading device made with a removable tray equipped with grippers for transferring fiber to a feeder with fiber loosening elements, having a device for transferring fiber to a continuous mixer conveyor kinematically connected to an inclined cleaner connected by a special device with an aerodynamic drying chamber containing a conveyor belt for transferring dry fiber to the mixer continuous, equipped with a conveyor for feeding fiber through a condenser into a press for packaging in cardboard boxes.

The invention is illustrated by the drawing, which shows the technological scheme of the installation for the production of silica fiber.

Installation for the production of silica fiber includes a staple machine (1) for cutting unidirectional fiber, connected by a conveyor belt with an inclined cleaner (2), equipped with a tray device for transferring loose fiber to the conveyor of a continuous mixer (3). The conveyor is connected by a rotary tray to the lifting hopper of the dispenser (4) for loading the fiber into a drum located on the preparation rack (5), transferred by auto-operators (16) to the pre-wetting bath (6), located in series with the leaching bath (7, 8, 9, 11 ), the intermediate washing bath (10) through the transfer bath (12), into the preliminary washing bath (13), through the preparation rack (14) to the centrifuge (15). The centrifuge is made with a removable tray with grippers for loading the squeezed fiber into the feeder (17), equipped with a device for transferring fiber to the conveyor of a continuous mixer (18), kinematically connected with an inclined cleaner (19) for loosening the treated fiber. The inclined cleaner is connected by a special device to an aerodynamic drying chamber (20), which contains a conveyor belt for transferring dry fiber to a continuous mixer (21), mounted with a conveyor that feeds the fiber through a condenser to a press (22) for packaging in cardboard boxes.

Installation works as follows:

Unidirectional fiber is laid in strands on the conveyor of the staple machine (1), fed to the working body and cut into segments of a given length. From the conveyor belt of the stapling machine, the fiber segments enter the inclined cleaner (2), where they are loosened into individual fibers and fall onto the moving conveyor of the continuous mixer (3). In the mixer, fiber accumulation and averaging takes place, which is periodically, in portions, using the rotary tray loaded into the dispenser lifting hopper, while the fiber is moistened with a strong (concentration of 60-65%) sulfuric acid solution using a spray device, which reduces the volume of the loaded fiber and allows increase the amount of fiber processed in one drum. Upon reaching the amount of fiber required for loading, the continuous mixer conveyor is turned off, the hopper of the dispenser is raised to the upper position, turned over and the moistened fiber is reloaded into a drum located on the preparation rack with the cover removed and oriented to the loading position. The dispenser hopper is returned to its original position, the drum cover is closed. The drum with the fiber is transferred using auto-operators to the positions of the production line according to the program specified in the computer in the following sequence:

Preparation rack (5) → pre-wetting bath (6) → 1 leaching bath (7) → 2 or 3 leaching bath (8) or (9) → intermediate washing bath (10) → 4 leaching bath (11) → transfer bath ( 12) → pre-wash bath (13).

After fixing the drums with the fiber in the support-catchers located on all bathtubs, they include its reverse rotation, which ensures uniform impregnation of the fiber with an acid solution and removal of reaction products from it into the solution. The organization of the fiber processing in 4 consecutive acid baths with intermediate washing of the fiber with tap water in front of the last 4th bath allows a high degree of leaching.

After preliminary washing of the fiber, the operator (16) transfers the drum to the preparation rack (14), on which the lid is removed from the drum, and then to the discharge position to the centrifuge (15), over which the unloading device is installed in the form of a cart with a hole, and the fiber from the drum overloaded into it for final washing and spinning. An empty drum is returned by the auto operator (16) through the transfer bath (12) to the preparation rack (5) for loading. At the same time, there are 8 reels in operation. After spinning the fiber, the lid of the centrifuge is opened, a removable tray is removed from it by means of grippers by the auto-operator (16), and the fiber is loaded into the feeder (17), where it is partially loosened. From the feeder (17), the processed fiber through the device enters the conveyor of the continuous mixer (18), where it is accumulated and averaged. The averaged fiber is conveyed periodically through the conveyor to the inclined cleaner (19) for loosening, from where, through a special device, to the aerodynamic drying chamber (20). The dried fiber is accumulated and averaged in a continuous mixer (21), and then, through a condenser connected to the press, it is loaded into boxes installed on a movable press platform for packaging.

The proposed set of essential features allows you to create a single technological cycle of production, automate it, increase productivity, improve product quality, reducing its cost.

Claims (3)

1. Installation for the production of silica fiber, including a staple machine connected by a conveyor belt with an inclined cleaner equipped with a device for transferring loose fiber to the conveyor of a continuous mixer, connected by a rotary tray with a lifting hopper of a dispenser with a spray device for loading fiber into a drum made with perforated walls and equipped with an individual automatic drive, located on the preparatory rack, carried by the auto operator in the last satisfactorily disposed acid and washing baths to a centrifuge reloading device made with a removable tray equipped with grippers for transferring fiber to a feeder with fiber loosening elements, having a device for transferring fiber to a continuous mixer conveyor kinematically connected to an inclined cleaner connected to a special device with an aerodynamic drying chamber comprising a conveyor belt for transferring dry fiber to a continuous mixer equipped with a conveyor for feeding fiber through a condenser into a pneumatic press for packaging in cardboard boxes. 2. Installation according to claim 1, characterized in that the acid and wash baths are equipped with supports for receiving and fixing the drums. 3. Installation according to any one of claims 1 and 2, characterized in that the device for reloading the fiber in a centrifuge is made in the form of a cart with a loading hole.