Manufacturing method of delivery rubberised fabric hoses

FIELD: production processes.

SUBSTANCE: invention refers to general rubber industry and can be used for manufacturing delivery rubberised fabric lay-flat houses. Manufacturing method of multi-chamber bonded structural element consists in the fact that on rolled cloth rubberised on both sides there arranged are two straps of untreated fabric and a flat gasket; at that, fabric straps are located with uniform allowance along cloth bends axes formed when closed rubberised fabric frame is assembled from it, and gasket - symmetrically along longitudinal axis of cloth; at that, gasket width shall provide its being placed on fabric straps at the distance equal to dimension between bends axes, two long chords are passed from vulcanised rubber with round transverse sections, rubberised cloth with untreated fabric straps are wound about chords so that straps comprise clamps enveloping the chords, and edges of rubberised cloth are laid overlapped on gasket, thus forming closed rubberised fabric frame; when plates of vulcanising press are joined, chords expand and press rectangular cross sections and give tension to a workpiece.

EFFECT: improving reliability and quality of delivery rubberised fabric hoses and simplifying their manufacturing procedure.

5 dwg

 

The invention relates to rubber industry and can be used for the manufacture of pressure belts pleskovawhatever sleeves.

A known method of manufacturing resinating bag products, which consists in the manufacture of seamless closed fabric bag frame and double sided obrezinivanie it. The internal lining of the frame is achieved by placing inside a flat mandrel (cardboard strip), covered on two sides of raw rubber paintings with their subsequent vulcanization. Finish the sleeve in the flat-wound on the reel. Cardboard strip remains inside the sleeve and removed from it during operation of the fluid flow (A.S. USSR №684836, IPC VN 7/14, 1979).

The main disadvantages of this method is the following: due to the high deformation fabric bag frame it significantly stretched in the transverse direction during the molding and vulcanization, and in the space between the stretched frame and flat mandrel flows rubber, resulting in navulkanizacie part of the inner side surfaces of the product, which reduces the reliability and quality of pressure hoses, as in places navulkanizacie they are prone to rupture; when the molding flat on the mandrel with the same dimensions is the hood fabric frame is limited and its redistribution, which leads to the formation of folds, creases, and also degrades the quality of the product by reducing its hydraulic strength due to squeezing of the fabric frame.

A known method for the production of rubber technical products, which is implemented on the device for the manufacture of rubber tubular products from the tape material. The method includes bilateral lining fabric cloth tape material) by winding it on a mechanism for feeding strip material, the Assembly of a closed rubber frame, which consists in driving material with overlapping on the expanding mandrel, made of spring steel in the form of the cylinder facing convex surface in the formation area of overlap, which is located in the recess of the mandrel, the flow wrapped rubber cloth mandrel in the mold, the molding and vulcanization press the tape material, which gives the tension by straightening mandrel and the form of the plate, removing the mandrel from vulkanizatornoy part of the pressure rubber hoses and return to the original the position, the selection of the finished product seaming mechanism (A.S. USSR №1412988, IPC WD 23/22, VS 53/50, 1988, bull. No. 28).

The disadvantages of this method.

1. The complexity of the design and technology of a convex mandrel of the spring with the Ali with constant properties (characteristics) in the case of cyclic deformations and changing temperature regimes molding and vulcanization.

2. Greater complexity of extracting the mandrel from the product after vulcanization, resulting in reduced reliability and quality pressure hoses due to a sharp fall in their hydraulic strength, as often has been a violation of the integrity of the walls of the sleeves.

3. The possibility of penetration of rubber into the space between deformable in the transverse direction of the frame and a steel mandrel when the closure plates vulcanizing press and navulkanizacie part of the inner side surfaces of the products, which can lead to the rupture pressure hoses in places navulkanizacie.

The technical object of the present invention is to improve the reliability and quality of the pressure rubber hoses, simplifying their manufacturing techniques.

The technical result is to increase the reliability and quality of the pressure rubber hoses, simplifying their production is achieved in that in the method of manufacturing a pressure rubber hoses, including bilateral lining fabric canvas with placing it on the rollers, the Assembly of a closed rubber frame with overlap, the moulding and vulcanization in a press assembled workpiece, which give the tension, the selection of the finished product on the rolls, rolled rubber canvas have two strips of untreated fabric and flat gasket, PR is than strips of cloth are placed with a uniform allowance along the axes of the folds of the cloth, formed by the Assembly of him closed rubber frame, and the strip - symmetrically along the longitudinal axis of the blade, the width of the strip must ensure that its imposition on a fabric strips, fabric strips at a distance equal to the dimension between the axes of the bends, missing two long cord made of vulcanized rubber with circular cross-sections, rubberized fabric not impregnated fabric strips wrapped around the cords so that the strips of fabric which form the staples, envelopes cords, and the edges of the canvas is laid with an overlap on the strip, forming a closed rubber frame, when the closure plates vulcanizing press cords extend, accept rectangular cross-section, and attach the workpiece tension.

Figure 1 shows a diagram of a device for implementing the method; figure 2 is a top view; figure 3 is a section a-a in figure 2; figure 4 - cross section B-B in figure 2 (before crimping); figure 5 is the same (in the process of molding and vulcanization).

Rolled out with a rolling 1 rubber two sides of the canvas 2 has two strips covered fabric 3 and the flat strip 5, which is unwound respectively with the coils 4 and 6. Strips of fabric 3 is placed with a uniform allowance along the axes of the folds of the cloth 2, formed by the Assembly of him closed resinate is avago frame, and the gasket 5 is symmetrically along the longitudinal axis of the blade 2 with the overlay strip on fabric strips 3. At a distance equal to the dimension between the axes of the curves, a fabric strips 3 skipped unwound from the bobbins 8 two long cord 7 from vulcanized rubber with circular cross-sections.

Rollers 9 produced wrap rubberized canvas 2 covered with fabric strips 3 cords around 7 with the formation of the strips of fabric 3 brackets 10, envelope cords 7 and putting the edges of rubberized canvas 2 with an overlap of 11 on the strip 5 with ensuring the formation of a closed rubber frame.

The assembled workpiece filed in vulcanizing press 12 with a fixed bottom plate 13 located therein the mold 14 and the movable upper plate 15. When the closure plates 13 and 15 vulcanizing press 12 cords 7 are expanded, taking in transverse cross-section the shape of rectangles 16 and attaching the workpiece tension.

After molding and vulcanization of the finished product 17 selected on the rolls 18.

A method of manufacturing a pressure rubber hoses as follows.

In the device for realization of the proposed method set rollers 1, the coil 4, 6 and bobbin 8 with wound respectively 2, 3, 5, 7.

Rolled out with a rolling 1 rubber with two hundred is he the canvas 2 have two strips covered fabric 3 and the flat gasket 5, which is unwound from the coils 4 and 6. Strips of fabric 3 width "a" is placed with a uniform allowance along the axes of the estimated future bends the blade 2 formed by the Assembly of him closed rubber frame, and a gasket 5 is symmetrically along the longitudinal axis of the blade 2. The width "b" of the strip is chosen so that it is superimposed on the strips of fabric 3. The material of the strips 3 is covered and neprofesiona fabric (grey), for example, type calico. As a flat strip 5 can be used cardboard or heat-resistant film with a metallized surface. At a distance L equal to the dimension between the axes of the curves, a fabric strips 3 miss unwound from the bobbins 8 two long cord 7 from vulcanized rubber with circular cross-sections.

System angles of the rollers 9 is wrapped rubberized canvas 2 covered with fabric strips 3 cords around 7 so that the strips of fabric to form a C-shaped bracket 10, the envelopes of the cords 7 and the edge of the rubber blade 2 is placed on the gasket 5 with an overlap of 11 in the space between the cords 7, which provides an Assembly of a closed rubber frame. Wrap the material around the cables 7 can be done by special guides (not shown). The assembled workpiece closed resinate is avago frame served in a vulcanizing press 12 with a fixed bottom plate 13, located on it the mold 14 and the movable upper plate 15. Then include vulcanizing press 12 and is closing its plates 13 and 15. When the closure plates 13, 15 vulcanizing press 12 round cords 7 are expanded, become flat, taking in transverse cross-section the shape of rectangles 16 and attach the workpiece tension that aligns deformation fabric canvas limited and prevents the formation of folds, the folds in the moulding and vulcanization of a closed rubber frame. Depending on the initial diameters of the cords 7, you can receive the necessary tension fabric cloth. The presence of brackets 10 of the fabric grey fabric, envelope cords with rectangular cross sections 16 and the overlay strip 5 on the bracket 10 does not allow the rubber to flow under the cords and the gasket and do not allow savonarolas part of the inner side surfaces of the product. During the process of molding and vulcanization of the workpiece does not move. After vulcanization plate vulcanizing press 12 unlock, as the material of the cords is vulcanized rubber, they take the original shape with a round cross sections. The finished product 17 in a flat view taken in a roll on the rolls 18, while the harvested area of the workpiece again served in the volcanic mountain rage is sure press and repeat the processes of molding and vulcanization. The gasket 5 and the cords 7 leave inside the finished product. After unwinding from a roll pressure hoses in preparation for operation pull from it the cords 7, which is used in the production of a new batch of the product. The strip 5 is removed from the sleeve by fluid flow during the operation.

The originality of the proposed method of manufacturing a pressure rubber hoses is that at the rolled rubber with two sides of the canvas 2 have two strips covered fabric 3 and the flat gasket 5, and strips of fabric 3 width "a" is placed with a uniform allowance along the axes of the folds of the cloth 2, formed by the Assembly of him closed rubber frame, and a gasket 5 is symmetrically along the longitudinal axis of the blade 2, the width "b" of the strip 5 should provide overlay it on a fabric strips 3, fabric strips 3 at a distance L equal to the dimension between the axes of the bends, miss two long cord 7 from vulcanized rubber with circular cross-sections, rubberized canvas 2 covered with fabric strips 3 is wrapped around the cords 7 so that the strips of fabric 3 form the bracket 10, the envelopes of the cords 7 and the edge of the rubber blade 2 is placed with an overlap of 11 on the strip 5, forming a closed rubber frame, when the closure plates 13, 15 vulcanizing press is 12 cords 7 are expanded, take a rectangular cross-section 16 and attach the workpiece tension that allows

1. To simplify the manufacturing technology pressure rubber hoses, as located inside the sleeve flat strip and cords made of vulcanized rubber simple in design and do not produce retrieving them before selecting the finished products on the rolls.

2. To increase the reliability of pressure pipelines due to the fact that the extraction of these cords in preparation for operation and leaching from the sleeve by fluid flow strip during operation does not lead to violation of the integrity of the walls of the sleeves and lower hydraulic strength.

3. To improve the quality of the sleeve due to the presence of the staples of the untreated fabric, envelope cords, the imposition of a flat strip in strips of cloth, which excludes the possibility of wicking rubber under the cords and the gasket when the closure plates vulcanizing press and navulkanizacie part of the inner side surfaces of the product, does not lead to the rupture pressure hoses during operation.

Thus, the proposed method allows to achieve a technical result on the increase of reliability and quality pressure rubber hoses, simplifying their manufacturing techniques.

A method of manufacturing a pressure rubber hoses, including bilateral clicks iniana fabric canvas with placing it on the rollers, the Assembly closed rubber frame with overlap, the moulding and vulcanization in a press assembled workpiece, which give the tension, the selection of the finished product for sealing, characterized in that at the rolled rubber canvas have two strips of untreated fabric and flat gasket, and strips of cloth are placed with a uniform allowance along the axes of the folds of the fabric formed by the Assembly of him closed rubber frame, and the strip - symmetrically along the longitudinal axis of the blade, the width of the strip must ensure that its imposition on a fabric strips, fabric strips at a distance equal to the dimension between the axes of the bends, missing two long cord from vulcanized rubber with circular cross-sections, rubberized fabric not impregnated fabric strips wrapped around the cords so that the strips of fabric which form the staples, envelopes cords, and the edges of the rubber cloth is laid with an overlap on the strip, forming a closed fabric frame, when the closure plates vulcanizing press cords extend, accept rectangular cross-section and attach the workpiece tension.



 

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