SU1764767A1 - Multicell press mold for thin-walled complex-profile gasified foam patterns - Google Patents

Abstract

The mold contains a bottom half-form and an upper half-form consisting of a grill and a cover. In the bottom half-form there are longitudinal slits, into which the lattice enters. Removable inserts are also located in the slits, allowing the individual elements of foam models to be molded, for example a boss. The cross bars of the lattice and the insert form partitions between the sockets of the mold with a profile corresponding to the side contour of the foam model being manufactured. The mold contains adjustable stops, which are fixed by lock nuts on the mold. The mold also contains gate valves that are installed in the guide grooves of the lower half-form with the possibility of longitudinal movement. The gates are attached to the lower half-form with screws. Plates are attached to the lid, which give it additional rigidity and prevent the inserts from moving in the vertical plane. 00 C

Description

The invention relates to a foundry, in particular, to devices for making polystyrene foam gasified models, and can be used to obtain complex and thin-walled products from expanded polystyrene.

A device for manufacturing complex thin-walled gasifiable models is known, comprising a housing and a press plate with a forming surface, interconnected by adjustable length stops with the formation of a container with complex profile cavities for the gasified material 1.

Also known is a multi-station mold for the manufacture of thin-walled complex-profile gasifiable foam models, containing two half-molds, one of which is made of composite, movably mounted gate valves and lugs 2 interacting with them.

A disadvantage of the known mold is that it does not allow to simultaneously obtain several foam models of a high degree of accuracy and identity, since the mold design predetermines the separate processing of each of its nests (complex profile cavity), which leads to an increase in labor intensity and reduces manufacturability manufacturing

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About ±

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The aim of the invention is to improve the manufacturability and accuracy of manufacture.

The goal is achieved by the fact that in a multiplace mold for the manufacture of thin-walled gas-forming foam models containing two half-molds, one of which is made of composite, movably installed gates and interacting stops, the bottom half-shape is made with slots in which the grille the surface of the crossbars of which the curvilinear outline, common to all the nests of the mold, and the lateral surfaces of the crossbars represent the profile corresponding to the contour my model, with the stops placed on the lattice, and the gates are installed in guide grooves made in the lower half of the mold.

The mold is provided with removable inserts that are placed in additional slots made in the upper half-form.

The invention is illustrated graphically, where in FIG. 1 shows a multistage mold in the plan; in fig. 2 - the same, with inserts; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one; in fig. 5 shows a section B-B in FIG. 2; in fig. 6 - section G-Y in FIG. 2

The mold consists of a bottom half-form 1 and an upper half-form consisting of a lattice 2 and a cover 3 rigidly interconnected.

The half-form 1 has slots a in which the grid 2 is placed.

The end surfaces E of the crossbars of the lattice 2 are made with a curvilinear outline, for example, they have a dome-shaped profile common to all the sockets 4 of the mold. While the surface E of the cross bars of the lattice, in contact with the inner surface W of the lid 3, form together with the lid and the lower half-form 1 a shaping cavity.

The side surfaces and the crossbars of the lattice 2 have a curved profile corresponding to the contour D of the foam model being manufactured.

In the guide grooves of the half-form 1, the gates 5 are installed, and the height-adjustable stops 6 are placed on the lattice 2 of the upper half-form. At that, the gates 5 are installed with the possibility of longitudinal movement due to the presence, for example, of stepped screws 7 placed in the longitudinal grooves made in the gates and connecting gates with

half-form 1, as well as with the possibility of interaction with the lugs 6, for example, through through holes,

made in the gates and the mold 1, and the extreme positions of the movement of the gates correspond to the formation or elimination of the technological gap b between the half-molds, the fixed position

0 stops 6 are provided with locknuts 8.

The mold is equipped with removable inserts 9 in the view of embedded elements installed in additional openings made in the jacks 4. The presence of the inserts 9 makes it possible to form hard-to-remove parts of foam models, for example a boss 10.

To the cover 3 attached longitudinal

0 plate 11, preventing movement of the inserts 9 in the vertical plane and their arbitrary loss of the mold when changing the position of the latter.

The work of the mold is carried out

5 as follows.

The upper mold half set on the bottom mold. In this case, the lattice 2 enters the slots of half-form 1, whose profile corresponds to the configuration of the crossbars

0 lattice. Then the gates 5 move along the guide grooves of the half-form 1 to the position when the holes made in the gate and the lower half-form do not coincide, i.e. when they are blocked. In this case, the stops

5 6, resting on the gates 5, form a technological gap b between the lower and upper half-molds, the required value of which is established by fixing the lugs in a predetermined position by the lock nuts 8.

0 After filling the mold nests with expanded polystyrene granules, the gates 5 shift in the opposite direction until the holes are aligned. When this stops 6, the passage through the holes in

5 gates 5, fall into the holes of the half-mold 1. Then, polystyrene polystyrene granules are compressed uniformly, for which the half-molds are closed at the connector point, for example, by squeezing with a clamp (not shown).

If it is necessary to form hard-to-remove portions of 10 foam models, the plates 11 are fixed on the lid 3 of the upper half-mold, and in the additional slots in

5, the inserts 9 are installed, after which the upper mold half is joined to the lower mold half.

The establishment of the technological gap, the loading of the mold with expanded polystyrene granules and the closing of the molds is carried out in the same way.

After completion of the heat treatment, for example, in an autoclave, the mold half is freed from the tightening device, the lower mold is separated from the upper mold and the finished foam models are removed from the upper mold. In this case, if there are inserts 9, the foam models are removed together with the inserts with the subsequent release of the protruding parts of the foam models, for example, the lugs 10, by separating the insert from the foam model.

The proposed mold, compared with the known (prototype), provides the following advantages:

improving the accuracy in the manufacture of identical thin-wall gasified foam models of a curvilinear profile with a variable cross-section;

expansion of technological capabilities, as it allows to manufacture foam models of complex profile castings such as impellers for pumps, turbine blades, etc .;

reducing the labor intensity of manufacturing the mold by simplifying the design and making the upper half-mold in two parts, followed by their fixation;

possibility of processing the main forming surfaces of all nests of a multi-stage mold from a single installation.

Claims (2)

Invention Formula 1 Multiple mold for the manufacture of thin-walled gas-profiled gas models of foam models containing two half-molds, one of which is made of composite, movably installed gate valves and interlocks that interact with them, in order to improve the manufacturability and accuracy of manufacturing, with slots in which the grid is placed, the end surfaces of the crossbars of which are made with a curvilinear outline, common to all the nests of the mold, and the lateral surfaces of the crossbars represent This is a profile that corresponds to the contour of the model being manufactured, with the stops placed on the grid, and the gates are installed in guide grooves made in the lower half of the mold. 2. A mold according to claim 1, which is designed so that, in order to expand technological capabilities, it is provided with removable inserts that are placed in additional slots made in the upper half-form. u / L / ( Fig.Z b b # y r / 70 Fm five Yu J 9 / L-jl de / o u / yo // j phage. five