RU2382697C1 - Moulded set for formation of equi-thickened bulky ceramics from aqueous slips - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: moulded set for formation of equi-thickened bulky ceramicas from aqueous slips contains moisture absorption matrix, punched casing, moulding model, core, units for its reciprocal co-axial installation and inflow, and centraliser. Additionally outlet nozzle of core is outfitted by source of light, or is implemented as reflecting. Centraliser contains positioning unit, video camera and block of treatment and introduction of image.

EFFECT: reduction of corporeal expenditures and work content.

3 dwg

Description

The invention relates to the ceramic and aviation industries and can mainly be used when molding by slip casting of aqueous suspensions into porous forms of ceramic products such as nasal dielectric cones of aircraft.

A device for molding ceramic products from water slips (Patent for the invention of the Russian Federation No. 2133928, 12/27/1998), containing a moisture-absorbing matrix, a molding model, a core with a support flange and a forming rod, make-up containers and a centering device made in the form of a detachable the lower part of the moisture-absorbing matrix, equipped with a body with a central hole for fixing the toe of the forming model, with a centering rod placed in the body coaxially with the central hole, with the possibility of axial movement communications.

A disadvantage of the known device is that when forming large-sized ceramic products (workpiece height> 1000 mm), the slurry poured falls into the body of the centering device, thereby creating a lack of recharge of the bow of the workpiece, which in turn leads to the formation of through fistulas in the bow of the workpiece.

The closest in technical essence to the claimed solution is a device for molding ceramic products from water slips (Patent for the invention of the Russian Federation No. 22232359, 20.12.2004), containing a moisture-absorbing matrix, a molding model, a perforated body, core, nodes for their mutual pine installation and make-up and centering device located in the bow and made in the form of micrometric elements with a sliding rod.

A disadvantage of the known device is that the centering device, made in the form of micrometric elements with a retractable rod, is statically fixed in the bow of the moisture-absorbing matrix. This arrangement excludes the possibility of its use simultaneously in several mold sets, which leads to an increase in material costs. In addition, as experience with a known centering device has shown, measuring the distance to the nose of the core (at several points) takes a fairly long time, which significantly increases the complexity of this operation.

The objective of the present invention is to reduce material costs and complexity when working with a centering device.

This object is achieved by the fact that the proposed kit for forming equal-thickness large-sized ceramic products from water slips containing a moisture-absorbing matrix, a perforated body, a forming model, a core, nodes for their mutual coaxial installation and feeding and a centering device, characterized in that the toe of the core is equipped the light source is either made reflective, and the centering device comprises a positioning unit, a video camera, and an image processing and output unit.

The authors experimentally established that the implementation of the centering device in the form of a video camera and an image processing and output unit leads to the fact that when assembling the mold kit, the worker real-time sees the location of the core axis relative to the axis of the moisture-absorbing matrix (observations are made through an opening in the bottom flange of the perforated body) and using the installation nodes can quickly correct the position of the core.

It was established that for more accurate centering, the video camera should be located normal to the lower flange of the perforated body, which is provided by the presence of a positioning unit. In addition, the positioning unit allows the use of a centering device on various mold sets, which indicates its versatility.

It was also experimentally established that the core toe can be located in the dark cavity of the moisture-absorbing matrix at a depth of 50 mm from the lower flange of the perforated body, which excludes the possibility of determining its location with a video camera. To avoid this negative circumstance, the core toe is either provided with a light source or reflective (for example, polished).

The drawings show a General view of the inventive molded kit. Figure 1 shows the complete device with a forming model that forms the inner contour of the gypsum surface of the matrix and repeats the outer surface of the product. Figure 2 presents a diagram of the alignment of the core relative to the moisture-absorbing matrix using a centering device. Figure 3 presents a ready-to-use device with an exposed core that forms the inner circuit of the molded products.

The mold kit for forming equal-thickness large-sized ceramic products from water slips contains a moisture-absorbing matrix (1), a forming model (2), a perforated body (3), a centering device consisting of a positioning unit (4), a video camera (5) and a processing and output unit image (6), core (7), nodes of the mutual coaxial installation of the moisture-absorbing matrix and core (8), recharge nodes (9).

The operation of the device is shown in the following example.

To form a moisture-absorbing matrix, a forming model (2), forming the inner contour of the surface of the moisture-absorbing matrix and repeating the outer surface of the product, is inserted into the perforated body (3), sealed with gypsum for tightness (Fig. 1). At the same time, a positioning device (4) with a video camera (5) installed in it is fixed on the bottom flange of the perforated body. Using the image processing and output unit (6) and installation units (8), the center of the forming model is set in the center of the hole in the lower flange of the perforated body and the gypsum is poured. After gypsum hardens, the forming model is removed and a moisture-absorbing matrix remains, located inside the perforated body.

Then, a core (7) is inserted into the dried moisture-absorbing matrix (1), which forms the inner contour of the molded product, which is fixed using the nodes of the mutual coaxial installation (8) (Fig. 2). Then, similarly to the method described above, the center of the core is set in the center of the moisture-absorbing matrix. In this case, the illuminated sock of the core greatly simplifies the search for the center of the core with a video camera.

Before pouring the product (Fig. 3), the centering device is removed, and in its place, a recharge unit (9) is installed, through which the form is filled with a slip. After the preform is formed, the core (7) is removed and its recess is removed.

Due to the fact that the centering device is removed immediately before filling the slip, it can also be used on other mold sets, thereby eliminating the need to install each mold set on its own centering device, which indicates its versatility.

In addition, as shown by the use of centering devices known from the prototype and according to the proposed technical solution, in the latter case, the duration of the centering operation takes three times less time.

The proposed device is extremely simple to manufacture and operate, it is especially successfully used in the molding of equally thick large-sized ceramic products from aqueous slips.

Information sources

1. Patent for the invention of the Russian Federation No. 21393928, 12/27/1998

2. Patent for the invention of the Russian Federation No. 2242359, December 20, 2004

Claims (1)

A mold kit for forming equal-thickness large-sized ceramic products from water slips containing a moisture-absorbing matrix, a perforated body, a forming model, a core, nodes for their mutual coaxial installation and recharge, and a centering device, characterized in that the toe of the core is equipped with a light source or is made reflective, and the centering device comprises a positioning unit, a video camera, and an image processing and output unit.

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