SU959897A1 - Drawing plate for producing casting moulds - Google Patents

Description

The invention relates to foundry, in particular to model equipment.

It is known to manufacture a model plate in whole or in part from rubber ΙΌ Closest to the invention in terms of technical nature and the achieved result is a broaching plate containing a housing with holes corresponding to the outline of the models in plan [2].

The disadvantage of such plates is the high complexity of their manufacture and increased wear of the drawing plates and the base of the models along the planes of their contact.

The purpose of the invention is to reduce the complexity of manufacturing and increase the service life of the broaching plate and model kit, as well as accelerating the repair of the broaching plate.

This goal is achieved by the fact that for a broaching plate containing a housing with holes corresponding to the outline of the models in plan, the walls of the housing holes are lined with bushings of elastic polymer material protruding above the upper plane of the broaching plate. thirty

Moreover, a removable metal sleeve is installed in the holes under the model, lined with elastic polymer material over the working surface.

In addition, the height of the facing sleeve of elastic polymer material over the upper plane of the broaching plate is 0.2-1.0 mm.

In FIG. 1 shows a broaching plate, 'longitudinal section; figure 2 is the same, a view of the glider in figure 2; 3 - va _: variant of the design of the broaching plate, longitudinal section; in FIG. 4 - same, 15 plan view.

The broaching plate 1 is made of metal and has a hole 2 for the model, lined with a polymeric material (polymer lining) with elastic properties. A polymer cladding (for example, a polyurethane layer) is applied over the entire height of the working surface 4 of the broaching plate 1. The thickness of the cladding 3 is 3-8 mm, depending on the overall dimensions and configuration of the fashion? ” lnnogo kit (modep not shown in the drawings). The height of the polymer cladding 3 above the upper plane of the broaching plate is 0.2-1.0 mm

For forming parts such as bushings in a broaching plate 1 (Fig. 3), a bore 5 is made into which a metal sleeve 6 is pressed, lined with a polymeric material (polymer lining), having elastic properties.

To speed up the repair, the lined metal bushings 6 can be manufactured separately, and when the working surfaces 4 of the broaching plate Yu 1 are worn out, they can be quickly replaced. In the process of obtaining a sand-clay mold on the table of a molding machine or machine due to the forces arising during molding, the flexible polymer lining 3 is pressed tightly against the model passing through hole 2, as a result of which the gap between the model and polymer cladding z! At the end of the molding process 20, the polymer lining 3 returns to its original position due to its elastic properties.

After removing the finished form from the machine table along the contour of the mold, 25 girdles with a depth of 0.1-0.3 mm remain, which plays the role of an anti-crimping girdle, which prevents castings from becoming clogged.

The use of resilient material in: „manufacturing of a broaching plate allows to eliminate expensive labor-intensive manual operations, i.e. It is planned to obtain the exact contour of the hole in the plate not by manual processing, but by pouring elastic material into the gap between the walls of the crack **

Zerovanny holes in the slab · th model, held in the hole at the time of pouring.

Claims (3)

In order to form parts like bushings in stretcher plate 1 (FIG. 3), a spacing point 5 is made into which a metal sleeve 6 is coated with a polymer material (polymer facing) with elastic properties. To speed up the repair, lined metal bushings 6 can be manufactured separately, and when the working surfaces 4 of the lining plate 1 are worn, they can be quickly replaced. In the process of obtaining a sandy-clay mold on the table of a molding machine or an automaton, due to the forces arising during the molding, the flexible polymeric facing 3 is tightly pressed to the model passing through the opening 2, resulting in a gap between the model and the polymeric facing 3. At the end of the molding process, the polymer facing 3 is due to its elastic properties;: returns to its original position. After removing the finished mold from the stand of the machine along the contour of the mold, the juice remains at a depth of 0.1-0.3 mm, which plays the role of anti-shrinkage, which prevents the castings from marring on blockages. Application, elastic material in; the manufacture of the extension plate makes it possible to eliminate costly laborious manual operations, i.e. It is envisaged to obtain an accurate contour of the hole in the slab not by manual treatment, but by pouring elastic material into the gap between the walls of the milled hole in the slab and the mold, which was drawn into the hole on the fill strip. Claim 1. Manufacturing plate for making casting molds, comprising a body with holes, corresponding to the contour of the models in plan, characterized in that, in order to reduce the labor intensity of production and increase the service life of the stretching plate and the model set, the walls of the holes of the body The extension plate is lined with sleeves of elastic polymer material a, protruding above the upper plane of the extension plate. 2. Plate 1, different from the fact that, in order to speed up the repair of the extension plate, a removable metal sleeve is installed in the holes for the model, lined on the working surface with an elastic polymeric material. 3. Plate POP.1 IP.2, differing in that the height of the facing sleeve of the elastic polymer material of the child by the upper plane of the pull plate is 0.2-1.0 mm. Sources of information, taken into account in the examination 1. USSR author's certificate 73243, cl. In 22 S 7/04, 1939. 2 “Lozhichevsky A.S. Metal models. M., Mashgiz, 1958, p. 86-94. Sh tfta, 1 J c. at cr