CN116198062A

CN116198062A - Diameter-variable rubber vulcanization mold inner mold

Info

Publication number: CN116198062A
Application number: CN202111454599.2A
Authority: CN
Inventors: 张新军; 李鹏; 屈兆麒; 赵天琪; 王婷
Original assignee: Beijing Research and Design Institute of Rubber Industry
Current assignee: Beijing Research and Design Institute of Rubber Industry
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2023-06-02

Abstract

The invention discloses an inner die of a variable-diameter rubber vulcanization die, which comprises an outer movable die block and an inner die core; the outer segmented block consists of an inner mold outer segmented block large block, an inner mold outer segmented block small block, an inner mold outer segmented block large block and an inner mold outer segmented block small block. When the inner mould core is not inserted, the outer movable mould block is elliptical in shape; when the inner mold core is inserted, the inner mold core is provided with an inclined plane matched with the movable module block, the movable module block is pushed outwards, and the outer movable module block is circular in shape. The mold can be precisely molded, and the internal mold is used for pressurizing to complete the molding and vulcanization of rubber.

Description

Diameter-variable rubber vulcanization mold inner mold

Technical Field

The invention relates to the field of rubber compression molding vulcanization, in particular to an inner die of a variable-diameter rubber vulcanization die suitable for molding an internal framework material.

Background

The rubber vulcanization is usually carried out by adopting a mould pressing vulcanization mode, and the mould has the functions of pressurizing, shaping, heat transfer and the like. When the glue mobility is good and no curtain cloth is used as a framework material, good products can be easily obtained by the way of upper and lower dies. When the curtain cloth is used as a framework material in the product, the curtain cloth can be bent and pockets are formed in the pressurizing direction by adopting the compression molding mode, and under the condition of repeated use at high frequency, the product can possibly have the delamination phenomenon of sizing materials and frameworks, so that the service life and the bearing capacity are greatly reduced. Therefore, aiming at the phenomenon, the tire adopts the product preforming, the preformed semi-finished product is placed between the pressure-released inner capsule and the outer segmented mold, and the inner capsule is pressurized and expanded to finish the shaping and the curing of the product. The capsule press vulcanization molding is easy to generate the phenomenon of large internal dimensional deviation of products, which is not allowed under certain use conditions, so that the design of an internal mold press mold with variable diameter and accurate vulcanization size is necessary.

Disclosure of Invention

The invention aims to provide an inner die of a variable-diameter rubber vulcanization die, which effectively solves the problem of bending and pocket lifting caused by adopting a common die pressing mode when a cord fabric framework material is contained in a product, and the problem of demolding the vulcanized product.

In order to achieve the above purpose, the technical scheme of the invention is as follows:

the variable-diameter rubber vulcanization mold inner mold is characterized by comprising an outer movable mold block and an inner mold core 5; the outer side segmented module block consists of an inner mold outer side segmented module large block 1, an inner mold outer side segmented module small block 2, an inner mold outer side segmented module large block 3 and an inner mold outer side segmented module small block 4.

According to one embodiment of the invention, when the internal mold core is not inserted, the external movable mold block is elliptical in shape; when the inner mold core is inserted, the inner mold core is provided with an inclined plane matched with the movable module block, the movable module block is pushed outwards, and the outer movable module block is circular in shape.

According to one embodiment of the invention, after the vulcanized product is preformed, the inner cavity of the vulcanized product is larger than an ellipse formed by the outer movable module blocks when the inner mold core is not inserted, the preformed product is placed between the outer mold and the outer movable module blocks, the upper mold is pressed down to enable the inner mold core to enter the inner movable mold, the outer diameter of the inner mold is increased, the preformed semi-finished product is pressurized, and the shaping vulcanization of the product is completed.

The beneficial effects of the invention are as follows:

the pressurizing shaping and vulcanizing of the product are completed in an inner die reducing mode, the product with accurate inner die cavity size can be obtained, the bending pocket of the cord fabric of the product with the cord fabric framework layer can be avoided, and the pressure bearing capacity and the fatigue life of the product are improved. The vulcanization mold also facilitates the removal of the vulcanized product after vulcanization is completed.

Drawings

The invention is suitable for the inner mold of the variable-diameter rubber vulcanization mold, and the following lists a structural drawing of the inner mold of the variable-diameter rubber vulcanization mold, which briefly describes the content expressed in the specification:

FIG. 1 is a three-view and a three-dimensional view of an internal mold core in sequence

FIG. 2 is a three-view and a three-dimensional view of the segmented mold block (1) at the outer side of the inner mold

FIG. 3 is a three-dimensional view and a three-dimensional view of the segmented mold block (2) at the outer side of the inner mold

FIG. 4 is a front view, a plan view and a perspective view of the inner mold without the insert core

FIG. 5 is a sectional view, a plan view and a perspective view of an inner mold when the mold core is inserted

In the figure: 1, a segmented mold block I at the outer side of an inner mold; 2, a segmented mold small block I at the outer side of the inner mold; 3, a segmented mold block II at the outer side of the inner mold; 4, a segmented mold small block II at the outer side of the inner mold; and 5, an internal mold core.

The outer mold, the upper mold and the lower mold of the vulcanizing mold for the rubber product are not provided, and the corresponding design can be carried out according to the appearance of the product and the structure of the segmented mold.

Detailed Description

The technical solutions of the present invention will be described in detail with reference to the accompanying drawings, wherein the described embodiments are only some embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

Referring to fig. 1 to 5, an inner mold of a variable diameter rubber vulcanization mold is characterized in that the inner mold comprises an outer movable mold block and an inner mold core 5; the outer side segmented module block consists of an inner mold outer side segmented module large block 1, an inner mold outer side segmented module small block 2, an inner mold outer side segmented module large block 3 and an inner mold outer side segmented module small block 4.

When the inner mold core is not inserted, the outer movable mold block is elliptical in shape and is used as a core for coating and molding the sizing material; after the internal mold core is inserted, the movable mold blocks can be pushed outwards, and after the internal mold core is completely inserted in place, 4 mold blocks form a standard circle, so that the internal mold for final vulcanization is formed.

According to one embodiment of the invention, after the vulcanized product is preformed, the inner cavity of the vulcanized product is larger than an ellipse formed by the outer movable mould block when the inner mould core is not inserted, the preformed product is placed between the outer mould and the outer movable mould block, and the upper mould is pressed down to enable the inner mould core to enter the inner movable mould, so that the shaping of the product is completed. When the die disclosed by the invention is used for vulcanizing a product, the product needs to be preformed.

The inner mold core of the invention is combined with the upper mold of the outer mold, and the outer movable mold block of the inner mold is combined with the lower mold of the outer mold. When the upper die is not pressed down, the outer movable die block is elliptical in shape and forms a preformed semi-finished product die cavity with the outer die. The upper die is pressed down to enable the inner die core to enter the inner segmented die, and shaping of the product is completed. After vulcanization is completed, the lower die moves downwards, the movable block of the inner die is retracted, and the vulcanized product is taken out from the die.

Claims

1. The variable-diameter rubber vulcanization mold inner mold is characterized by comprising an outer movable mold block and an inner mold core (5); the outer side segmented module block consists of an inner mold outer side segmented module large block (1), an inner mold outer side segmented module small block (2), an inner mold outer side segmented module large block (3) and an inner mold outer side segmented module small block (4).

2. The variable diameter rubber vulcanization mold inner mold of claim 1, wherein the outer movable mold block has an oval shape when the inner mold core is not inserted; when the inner mold core is inserted, the inner mold core is provided with an inclined plane matched with the movable module block, the movable module block is pushed outwards, and the outer movable module block is circular in shape.

3. The variable diameter rubber vulcanization mold inner mold according to claim 1, wherein after the vulcanization product is preformed, the inner cavity is larger than an ellipse formed by the outer movable mold block when the inner mold core is not inserted, the preformed product is placed between the outer mold and the outer movable mold block, the upper mold is pressed down to make the inner mold core enter the inner movable mold, the outer diameter of the inner mold is increased, the preformed semi-finished product is pressurized, and the shaping and vulcanization of the product are completed.