RU2638857C1 - Method for manufacturing rotation shells and device for its implementation - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: method is implemented by successive moulding of the sides and the central part of the blank in claimed device with an outer half-mould, an inner half-mould and a mandrel tip configured for mutual displacement.

EFFECT: improved quality of rotation shells, increased manufacturability of their production, and increased versatility of the device, possibility for manufacturing claimed device of rotation shells with different positions of sides.

2 cl, 3 dwg

Description

The claimed group of inventions relates to chemical engineering and is intended for the production of reinforced shells of revolution from polymeric materials with different positions of the sides.

Closest to the claimed method according to the technical nature and the achieved result is a method of manufacturing products with a curved surface of revolution (RU 2142359, IPC ВСС 43/04, publ. 10.12.1999), which consists in winding blanks, installation in the mold and pressing.

The disadvantage of this method is the manufacture of a product blank exclusively by winding, which reduces the manufacturability of the manufacturing process of the product.

Closest to the claimed device in technical essence and the achieved result is a mold for vulcanization of hollow rubber products (RU 2384407, IPC ВСС 35/02, published on March 20, 2010, Bull. No. 8), containing the upper and lower half-forms forming the molding product surface, and forming diaphragm.

The disadvantages of the known molds are the low quality of the finished product (folding, shape distortion) due to the mismatch of the geometry of the shell blank of rotation with the geometry of the mold, as well as the low versatility in the manufacture of products with different arrangement of sides.

The technical result of the claimed group of inventions is to improve the quality of the shells of rotation, increase the manufacturability of their manufacture and increase the versatility of the device for the possibility of manufacturing in the claimed device shells of revolution with different positions of the sides.

The technical result is achieved by assembling the workpiece of the shell of rotation by any known method and sequentially forming in the claimed device the sides of the workpiece of the shell of rotation by an external half-mold with an external clamp and an internal half-mold with an internal clamp, as well as molding the central part of the workpiece with a mandrel tip. In this case, the outer half-mold, the inner half-mold and the mandrel tip have the possibility of mutual movement.

The essence of the claimed technical solution is illustrated by the following drawings:

FIG. 1 - a device for the manufacture of shells of revolution with different locations of the sides;

FIG. 2 - blank shell rotation before molding;

FIG. 3 - blank shell rotation after molding in the inventive device.

A device for the manufacture of shells of revolution with different positions of the sides contains an outer half-mold 1 and an inner half-mold 2; outer clamp 3 and inner clamp 4, forming respectively the outer side and the inner side of the shell of rotation; the upper mold half 8, forming the Central part of the shell of rotation. In this case, the outer half-mold 1 and the inner half-mold 2 have the ability to move in the vertical direction along the mandrel 5 along its threaded surfaces and the mandrel 5 contains a tip 6 moved by the ejectors 7 (Fig. 1).

The claimed group of inventions for the manufacture of shells of revolution works as follows.

The rotation shell blank is assembled from polymeric materials, for example, from rubber layers, and reinforcing material by any known method, depending on the geometry of the manufactured product and available equipment, for example, by applying separate layers (Fig. 2), which increases the manufacturability of the rotation shell blank. Then, the obtained shell blank of rotation is placed in the claimed device. In the claimed device, the operator-assembler moves the outer half-mold 1 and the inner half-mold 2 in the vertical direction relative to the mandrel 5 by rotating the half-molds 1 and 2 along the threaded surfaces of the mandrel 5. Moving the half-molds 1 and 2 establishes the relative position of the sides of the shell of rotation, which makes it possible to produce shell rotation with a different position of the sides, thereby increasing the versatility of the claimed device. After setting the position of the sides, the outer and inner side of the shell of rotation is crimped with clamps 3 and 4, thereby shaping the sides and fixing their position. After that, in the inventive device, the operator-assembler pushes 7 the tip 6 of the mandrel 5 and thereby forms the Central part of the shell of rotation, which provides the necessary tension of the power and rubber layers of the shell. The formation of the sides and the tension of the power and rubber layers brings the geometry of the shell of rotation blank to the geometry of the final product (Fig. 3), which eliminates defects in the shell of rotation, such as folding and shape distortion after vulcanization, and thereby improves the quality of the shells of revolution. The formation of the sides and the central part of the shell is carried out sequentially, which ensures the tension of the power and rubber layers of the shell of rotation.

After molding the blanks of the shell of revolution between the outer clamp 3 and the inner clamp 4, the upper half mold 8 is installed, fastened, for example, by bolting, the clamps and half molds to each other and the vulcanization of the rotational shell is carried out.

Claims (2)

1. A method of manufacturing shells of rotation, which consists in the fact that the blank of the shell of rotation is collected from polymeric materials and reinforcing material and vulcanization is carried out, characterized in that the blank of the shell of rotation is assembled, then, before vulcanization, they are successively molded and fixed with an external half-mold with an external clamp and an internal half-mold with an inner clip, its outer and inner sides, while the outer half-form and the inner half-form have the ability to move in the vertical direction along the mandrel , then the central part of the shell blank is rotated, the tip of the mandrel is extended, the upper half-mold is installed between the outer and inner clamps and the clamps and half-molds are fastened together. 2. The device for implementing the method according to claim 1, comprising an outer half-mold and an inner half-mold, an outer clamp and an inner clamp, an upper half-mold, characterized in that the outer half-mold and the inner half-mold have the ability to move vertically along the mandrel along its threaded surfaces, this mandrel contains a tip moved by ejectors.

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