CN-122008452-A - Vulcanizing mold for rubber composite material with multi-layer angle laying cords and using method

CN122008452ACN 122008452 ACN122008452 ACN 122008452ACN-122008452-A

Abstract

The invention discloses a vulcanization mold for rubber composite materials of multilayer angle paved cords and a use method thereof, wherein the mold comprises a paving positioning assembly and a cord fixing assembly, the paving positioning assembly comprises a positioning top plate, at least two layers of cord angle adjusting plates and a positioning bottom plate, a paving area of the cords and the rubber is arranged in the middle of each cord angle adjusting plate, a wire arrangement groove is further arranged on each positioning bottom plate, a positioning pin is arranged on each cord angle adjusting plate, angle limiting holes are formed in each cord angle adjusting plate, the relative angles of two adjacent layers of cord angle adjusting plates are adjusted through switching and matching of the positioning pins and the angle limiting holes, the cord fixing assemblies are arranged on two sides of the paving positioning assembly in pairs, the cord shafts extending out from two ends of the paving positioning assembly are straightened and positioned, and the cord fixing assemblies are fastened through a clamp fixing device through the wire arrangement clamp.

Inventors

WU JIAN
WU YUANYUAN
SU BENLONG
WANG YOUSHAN
LIN GUOCHANG
WANG WENXIN

Assignees

哈尔滨工业大学（威海）

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. The vulcanization mold for the rubber composite material of the multi-layer angle laying cord is characterized by comprising a laying positioning component and a cord fixing component; The laying and positioning assembly comprises a positioning top plate, at least two layers of cord angle adjusting plates and a positioning bottom plate, wherein the cord angle adjusting plates are clamped between the positioning top plate and the positioning bottom plate, a laying area is formed in the middle of each cord angle adjusting plate in a vertically penetrating mode, a wire-arranging groove is further formed in each cord angle adjusting plate, the wire-arranging grooves penetrate through the cord angle adjusting plates in the horizontal direction, a plurality of wire-arranging grooves are arranged in parallel in an array mode to form a wire-arranging layer, the symmetrical center of each wire-arranging layer is located on the rotating shaft of each cord angle adjusting plate, at least one pair of positioning pins are arranged on the positioning bottom plate, each cord angle adjusting plate is provided with an angle adjusting hole group matched with each positioning pin, each angle adjusting hole group comprises at least two angle limiting holes, and positioning holes for inserting the positioning pins are correspondingly formed in the positioning top plate; The cord fixing assemblies are arranged on two sides of the laying positioning assembly in pairs and used for axially straightening and positioning the cords extending from two ends of the laying positioning assembly, each group of cord fixing assemblies comprises an upper fixing clamp, a lower fixing clamp, clamping pads and a wire arrangement clamp which are matched with each other in an matched mode, the inner side profiles of the upper fixing clamp and the lower fixing clamp are respectively matched with the outer side profiles of the positioning top plate and the positioning bottom plate, the number of the clamping pads is N+1, N is the number of layers of laid cords, the N layers of cords are respectively clamped between the adjacent clamping pads, and the cord fixing assemblies are initially positioned through the wire arrangement clamps and then fastened through the clamping plate fixing devices.
2. The vulcanizing mold for the rubber composite material of the multi-layer angle paved cords according to claim 1, wherein the paving positioning assembly is used for overlapping and paving the cords and rubber, the paving area is used for alternately accommodating rubber sheets and the cords and providing forming space for the cords, the wire arrangement grooves are of groove structures, the inner contours of the wire arrangement grooves are matched with single cords and are used for restraining the paving trend of the cords and arranging the wires in a regular arrangement mode, the wire arrangement layers form corresponding cord layers after being paved, the cord layers are kept centered along with the rotation process of the cord angle adjusting plates, the positioning pins are matched with different angle limiting holes on the cord angle adjusting plates of the layers, the rotation angle of each layer of cord angle adjusting plates is independently locked, and the cord fixing assembly is used for fixing the cord layers extending outwards from two sides of each layer, and is clamped and isolated between the adjacent two layers of cord layers through clamping pads.
3. The vulcanization mold for the rubber composite material for the multi-layer angle paved cords, which is disclosed in claim 1, is characterized in that a positioning top plate and a positioning bottom plate of the paving positioning assembly are round or polygonal, handles which are convenient to operate are respectively arranged on the positioning top plate and the positioning bottom plate, the cord angle adjusting plate is in a ring shape or a polygonal ring shape which is consistent with the shapes of the positioning top plate and the positioning bottom plate, a prying groove serving as a prying point in demolding is formed at the edge of the lower bottom surface of the positioning top plate, the edge of the upper bottom surface of the positioning bottom plate and the edge of the upper bottom surface of each layer of cord angle adjusting plate, and a functional groove for accommodating a rubber sheet for vulcanization is formed in the middle of the lower bottom surface of the positioning top plate.
4. The vulcanizing mold for a rubber composite material of a multilayer angle-laid cord according to claim 1, wherein the center points of the angle limiting holes in each of the angle adjusting hole groups are all located on the same circumference with the rotation center of the cord angle adjusting plate as the center of a circle, and the central angles formed by connecting the center points of the adjacent two angle limiting holes with the center of the circle are 3-10 degrees.
5. A vulcanization mould for a rubber composite for a multi-ply angle laid cord as claimed in claim 3, characterized in that the central angle is 5 °.
6. The vulcanizing mold for the rubber composite material of the multi-layer angle paved cord as set forth in claim 1, wherein the wire clamp comprises two groups of clamping pieces, a pin shaft and an elastic component, the two groups of clamping pieces are hinged through the pin shaft to form an openable clamping structure, the elastic component is connected between the two groups of clamping pieces and used for providing clamping pretightening force, the two ends of the upper fixing clamp plate, the lower fixing clamp plate and each layer of clamping pad are respectively clamped and initially positioned through the wire clamp, the clamping plate fixing device comprises an adaptive fixing screw and a fixing nut, screw holes which are penetrated up and down are correspondingly arranged on the upper fixing clamp plate, the lower fixing clamp plate and each layer of clamping pad, and the fixing screw is penetrated in the screw holes and fastened through the fixing nuts so as to fix the cord layers clamped between the adjacent clamping pads.
7. The vulcanization mold for rubber composites with multi-layered angle laid cords according to any one of claims 1 to 6, wherein the test specimen prepared by the mold is used for testing the relevant mechanical properties of the cord/rubber composites, including uniaxial tensile properties of single-layered or double-layered cord-rubber composites at different laying angles, interlaminar delamination, shear mechanical properties of double-layered cord-rubber composites, dynamic adhesion of cord-rubber interfaces, fatigue behavior, overall mechanical properties of multi-layered cord-rubber composites, fatigue behavior.
8. A method of using a vulcanization mold for a rubber composite of a multilayer angle-laid cord as described in any one of claims 1 to 6, characterized by comprising the steps of: step 1, preparing materials, namely cutting equal-length cords, and cutting rubber sheets consistent with the shape of a positioning top plate for later use; and 2, spraying a release agent, namely spraying the release agent on the upper surface of the positioning bottom plate, the upper surface and the lower surface of each cord angle adjusting plate and the lower surface of the positioning top plate. Step 3, alternately laying a rubber sheet and cord layers in a laying positioning assembly, wherein each cord layer is positioned by embedding a cord into a wire arrangement groove of a cord angle adjusting plate, and matching of a positioning pin and different jacks in an angle adjusting hole group is switched according to a required interlayer included angle so as to adjust the relative angle of adjacent cord angle adjusting plates; Step 4, die assembly, namely die assembly of the positioning top plate and the positioning bottom plate; Step 5, fixing the cords, namely clamping and fixing the end parts of the cords extending out of the two sides of the laying positioning assembly through the cord fixing assemblies arranged on the two sides of the laying positioning assembly in pairs, so that the cords of each layer are kept in an axially straightened state; Step 6, vulcanizing, namely putting the die after die assembly and fixation into vulcanizing equipment for vulcanization molding; and 7, demolding and cutting, namely demolding after vulcanization is completed, taking out the composite material sample and cutting into a required test shape.
9. The method of using the multi-layered angle-laid cord rubber composite vulcanization mold according to claim 8, wherein the step 3 of laying and angle adjustment specifically comprises: S1, placing a bottom layer rubber sheet in a laying area of a positioning bottom plate; S2, placing a first layer of cord angle adjusting plate on a bottom layer of rubber sheet, penetrating locating pins on a locating bottom plate into corresponding insertion holes of the layer of cord angle adjusting plate according to a preset angle, and embedding cords into the wire-arranging grooves one by one to form a first layer of cord layer, so that two ends of the cord extend out of two sides of the cord angle adjusting plate; s3, paving a layer of rubber sheet on the first cord layer; S4, placing a second layer of cord angle adjusting plate on the rubber sheet, selecting the matching of the positioning pin and different jacks in the angle adjusting hole group according to the required interlayer included angle, and embedding the cords into the wire arranging grooves one by one to form a second layer of cord layer; S5, repeating the steps S3 and S4 until all the overlapped laying layers with preset layers are completed.
10. The method of using a vulcanizing mold for a rubber composite for a multilayer corner laying cord according to claim 8, wherein the step 5 fixes the cord by one of the following methods: The method comprises the steps of S1, sequentially stacking an upper fixed clamping plate, clamping pads, each layer of cord end and a lower fixed clamping plate on one side of a laying and positioning assembly, enabling each layer of cord to be clamped between adjacent clamping pads and locked through a clamping plate fixing device, S2, assembling the upper fixed clamping plate, the clamping pads, each layer of cord end and the lower fixed clamping plate on the other side of the laying and positioning assembly according to the same stacking sequence, and clamping by using a wire clamp to perform primary fixation, S3, applying axial tension to the cord on the wire clamp fixing side to enable the cord to be straightened and kept in a tensioning state, and repeating the operation until all the cords are straightened and positioned, S4, locking the side clamping plates through the clamping plate fixing device, and then withdrawing the wire clamp; The method comprises the steps of S1', sequentially stacking an upper fixing clamp plate, a clamp pad, the end parts of all layers of cords and a lower fixing clamp plate on one side of a laying and positioning assembly, clamping and preliminarily fixing by using a wire arrangement clamp, S2', completing preliminary fixing of the other side of the laying and positioning assembly by using the wire arrangement clamp according to the operation of S1', S3', applying axial tension to the cords on one side to enable the cords to be straightened and move along the wire arrangement clamp, repeating the operation until all the cords are straightened and positioned, and S4', after the two side clamp plates are locked by the clamp plate fixing device, removing all the wire arrangement clamps.

Description

Vulcanizing mold for rubber composite material with multi-layer angle laying cords and using method Technical Field The invention relates to the field of cord rubber composite material molds, in particular to a vulcanization mold for multilayer corner laying cord rubber composite materials and a use method thereof. Background It is known that aircraft tires, unlike vehicle tires, have higher performance requirements on their own. When a civil aircraft is landing, each tire is subjected to an impact load of up to 38 tons, which requires that its tires have a tear resistance far exceeding that of automobile tires. From synthetic rubber of natural rubber, from cotton cord to rayon cord, from bias tire to radial tire, radial tire occupies the main market of aviation tire so far, its internal structure is worth going to dig deeply, create economic value. At present, radial tires are used as representatives of high-end civil aviation tires, and compared with bias tires, the radial tires have more belt layers with different angle distributions. The structural layer is formed by compounding high-modulus cords and adhesive rubber, the rigidity of the tire body is improved through the circumferential tightening effect, and 60% -70% of internal stress load of the radial tire can be borne. Under extreme working conditions, the buffer belt technology can remarkably enhance the tire supporting performance under the air deficiency state by optimizing the arrangement mode of the cords. The mechanical properties of the conventional rubber composite material with the multi-layer angle paved cords are positively correlated with those of the radial tire, and the mechanical properties of the rubber composite material with the multi-layer angle paved cords are often used as references of the mechanical properties of the radial tire in the process of developing and designing the radial tire. At present, the existing rubber composite material vulcanizing mold for paving the cord generally comprises an upper template and a lower template, wherein the lower template is provided with a cord groove, and the upper template is used for being matched with a rubber sheet for forming. Such molds are typically only capable of preparing single layer, unidirectional cord-laid rubber composite test specimens. For the mechanical property test of the rubber composite material of the multi-layer angle paved cord, the prior method usually comprises the steps of cutting a single-layer unidirectional paved cord layer and a rubber layer which are formed in a preliminary mode into a specific shape, then stacking, putting the single-layer unidirectional paved cord layer and the rubber layer into a mold cavity, pressing and vulcanizing the single-layer unidirectional paved cord layer, changing the paved angle by adjusting the cutting direction of the cord layer, and forming an interlayer composite structure by stacking the rubber layers with the same thickness. In the method, each layer of cord is mainly constrained by extrusion of an upper rubber layer and a lower rubber layer in the vulcanization process, the consistency of the relative positions between layers and the structure of a sample is difficult to ensure, the control precision of the laying angle is low, the manual operation error is large, and the cord layer is easy to bend and deviate in the vulcanization process and is difficult to keep in a straightened state. Therefore, it is necessary to provide a rubber composite vulcanization mold capable of realizing multilayer cord ply laying, adjusting angles between adjacent layers and keeping cords stably positioned in the vulcanization process so as to meet the requirements of mechanical property test of the multilayer angle laid cord rubber composite. Disclosure of Invention The invention aims to solve the problems of insufficient control precision of a multi-layer cord sample laying angle, easy bending deflection of cords in a vulcanization process and poor sample consistency in the prior art, and provides a rubber composite material vulcanization mold capable of realizing multi-layer cord overlapping laying, stable adjustment of angles between adjacent layers and keeping axial straightening and positioning of the cords in the vulcanization process and a use method thereof. The vulcanization mold for the rubber composite material of the multi-layer angle laying cord is characterized by comprising a laying positioning component and a cord fixing component; The laying and positioning assembly comprises a positioning top plate, at least two layers of cord angle adjusting plates and a positioning bottom plate, wherein the cord angle adjusting plates are clamped between the positioning top plate and the positioning bottom plate, a laying area is formed in the middle of each cord angle adjusting plate in a vertically penetrating mode, a wire-arranging groove is further formed in each cord angle adjusting plate, the wire-arranging grooves penetrate t