阅读说明：本技术 一种全保护双材料复合密封圈 (Full-protection double-material composite sealing ring ) 是由 赵中辉 于 2021-01-28 设计创作，主要内容包括：本发明公开了一种全保护双材料复合密封圈,涉及密封圈生产领域,其包括橡胶O型圈,所述橡胶O型圈为橡胶半成品。该一种全保护双材料复合密封圈,通过本发明的生产方法,能够很好的实现O型橡胶密封圈表面包覆聚四氟乙烯膜,进而从生产工艺方面解决了此类密封圈难成型,合格率低等问题,通过首先进行聚四氟乙烯环与橡胶圈的粘接硫化一体成型,然后可以通过数控机加工成型,大大保证了尺寸的使用公差,从而解决了传统的半保护双材料复合密封圈制作方法由两个半成品通过粘接胶粘接的成型工艺对于尺寸调整具有一定局限性的问题。(The invention discloses a full-protection double-material composite sealing ring, relates to the field of sealing ring production, and comprises a rubber O-shaped ring which is a rubber semi-finished product. According to the full-protection double-material composite sealing ring, the polytetrafluoroethylene film can be well coated on the surface of the O-shaped rubber sealing ring through the production method, and the problems that the sealing ring is difficult to form and low in yield and the like are solved from the aspect of production technology.)

1. The utility model provides a full protection bimaterial composite seal circle, includes rubber O type circle (6), its characterized in that: rubber O type circle (6) are the semi-manufactured goods of rubber, the shape of rubber O type circle (6) is the square slice, be provided with polytetrafluoroethylene ring (5) in rubber O type circle (6), the size of polytetrafluoroethylene ring (5) is the size of well mould (3) cavity, the height of polytetrafluoroethylene ring (5) is 1/3 of well mould (3) cavity size.

2. The full-protection dual-material composite seal ring according to claim 1, characterized in that: the rubber O-shaped ring (6) is made of rubber materials, and the rubber materials comprise chloroprene rubber, fluororubber, nitrile rubber, silicon fluororubber and natural rubber.

3. The production method of the full-protection bi-material composite seal ring according to claim 1, characterized in that: the method comprises the following steps:

a1, setting the temperature of the flat vulcanizing machine to the temperature required by product vulcanization, placing the mould on the flat vulcanizing machine, and carrying out the following operations until the temperature of the mould reaches the required temperature;

a2, placing a polytetrafluoroethylene ring (5) into a mold cavity formed by a bottom mold (4) and a middle mold (3);

a3, covering the upper die (2) of the die;

a4, putting the weighed rubber material into the cavity of the upper die (2), and then covering the upper die cover (1);

a5, placing the assembled mould on a flat vulcanizing machine for hot vulcanization molding to obtain a semi-finished product;

a6, trimming the semi-finished product of the fifth step to obtain residual rubber, and precisely machining and molding by using an outer diameter numerical control machine so as to ensure the size of the product.

4. The production method of the full-protection bi-material composite seal ring according to claim 3, characterized in that: the temperature required by vulcanization is 140-180 ℃ for 5-30 minutes, and the temperature required by the mold is 140-180 ℃ for 5-30 minutes.

Technical Field

The invention relates to the field of sealing ring production, in particular to a full-protection double-material composite sealing ring.

Background

Along with the development of the society, especially the progress of scientific technology, the rapid development of social productivity is greatly promoted, especially the development of information industrialization drives the society to have qualitative leap, in the high-speed development engineering of the society, the automation and the intellectualization of equipment play a strong supporting role for the development of the society, along with the continuous improvement of the manufacturing level of modern industry, the energy consumption becomes a main factor of the cost performance of industrial products, especially for products in the top fields of aviation, aerospace and the like, the rigorous technical requirements are put forward, rubber products are taken as important components of industrial products and are widely applied to various fields by the unique high elastic characteristic, the sealing field is an important occasion for applying the rubber products, in the sealing field, the friction coefficient of the rubber sealing element and metal equipment determines the service life of the sealing element and the service performance of the equipment to a great extent, the traditional rubber sealing element has a large friction coefficient with metal, and the service performance of the sealing element is damaged due to the mechanical abrasion effect and the swelling effect of a solvent on a rubber product, so that the sealing failure is caused, and the performance of equipment is influenced.

But in the aspect of the forming process of the full-protection two-material composite sealing ring, the traditional method is mostly to put a tetrafluoroethylene film prepared in advance and a pure rubber O-shaped sealing ring into a vulcanization heating mould, and heating and bonding are carried out through bonding glue.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a full-protection double-material composite sealing ring, and solves the problem that the traditional manufacturing method of a half-protection double-material composite sealing ring has certain limitation on size adjustment by a forming process of bonding two half-finished products through bonding glue.

(II) technical scheme

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a full protection bimaterial composite seal circle, includes rubber O type circle, rubber O type circle is the half-finished product of rubber, the shape of rubber O type circle is the square slice form, rubber O type intra-annular is provided with the polytetrafluoroethylene ring, the size of polytetrafluoroethylene ring is the size of well die cavity body, the height of polytetrafluoroethylene ring is 1/3 of well die cavity size.

Preferably, the rubber O-shaped ring is made of a rubber material, and the rubber material comprises chloroprene rubber, fluororubber, nitrile rubber, silicone rubber, silicon fluororubber and natural rubber.

A production method of a full-protection double-material composite sealing ring comprises the following steps:

a1, setting the temperature of the flat vulcanizing machine to the temperature needed by the vulcanization of the product, and placing the mould on the flat vulcanizing machine to ensure that the temperature of the mould also reaches the needed temperature.

a2, placing the polytetrafluoroethylene ring into the cavity of the bottom die.

and a3, covering the upper die of the die.

a4, placing the weighed rubber material into the cavity of the upper die, and then covering the upper die cover.

and a5, placing the assembled mould on a flat vulcanizing machine for hot vulcanization molding to obtain a semi-finished product.

a6, trimming the semi-finished product of the fifth step to obtain residual rubber, and precisely machining and molding by using an outer diameter numerical control machine so as to ensure the size of the product.

Preferably, the temperature required by vulcanization is 140-180 ℃ for 5-30 minutes, and the temperature required by the mold is 140-180 ℃ for 5-30 minutes.

(III) advantageous effects

The invention has the beneficial effects that:

the full-protection dual-material composite sealing ring can well coat the polytetrafluoroethylene film on the surface of the O-shaped rubber sealing ring by the production method, and then the problems of difficult molding, low percent of pass and the like of the sealing ring are solved from the aspect of production process, the polytetrafluoroethylene ring and the rubber ring are firstly bonded and vulcanized to be integrally molded, then can be processed and molded by a numerical control machine, greatly ensures the use tolerance of the size, further controls the tolerance of the product to be within 0.05mm, and the precision exceeds the tolerance of a common O-shaped ring by 0.15mm-0.3mm, the method is further suitable for forming and producing the full-protection double-material composite sealing ring with a large size range, and therefore the problem that the size adjustment of the traditional manufacturing method of the half-protection double-material composite sealing ring is limited by a forming process of bonding two semi-finished products through bonding glue is solved.

Drawings

FIG. 1 is a schematic flow chart of a process for forming an O-shaped sealing ring wrapped with polytetrafluoroethylene film according to the invention;

FIG. 2 is a schematic flow chart of a process for forming an O-shaped seal ring with an inner polytetrafluoroethylene film according to the present invention;

FIG. 3 is a schematic top view of a cross-sectional structure of an O-shaped seal ring wrapped with a polytetrafluoroethylene film according to the present invention;

FIG. 4 is a schematic side view of a cross-sectional structure of an O-shaped seal ring wrapped with a polytetrafluoroethylene film according to the present invention;

FIG. 5 is a schematic top view of a cross-sectional structure of an O-ring of the present invention;

FIG. 6 is a schematic diagram of a cross-sectional side view of an O-ring of the present invention.

In the figure: 1 upper die cover, 2 upper dies, 3 middle dies, 4 bottom dies, 5 polytetrafluoroethylene rings and 6 rubber O-shaped rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, the present invention provides a technical solution: the utility model provides a full protection bimaterial composite seal circle, includes rubber O type circle 6, and rubber O type circle 6 is the semi-manufactured goods of rubber, and rubber O type circle 6's shape is the square slice, is provided with polytetrafluoroethylene ring 5 in the rubber O type circle 6, and polytetrafluoroethylene ring 5's size is the size of well mould 3 cavity, and polytetrafluoroethylene ring 5's height is 1/3 of well mould 3 cavity size.

The rubber O-shaped ring 6 is made of rubber materials, and the rubber materials comprise chloroprene rubber, fluororubber, nitrile rubber, silicon fluororubber and natural rubber.

A production method of a full-protection double-material composite sealing ring comprises the following steps:

a1, setting the temperature of the flat vulcanizing machine to the temperature needed by the vulcanization of the product, and placing the mould on the flat vulcanizing machine to ensure that the temperature of the mould also reaches the needed temperature.

a2, placing the polytetrafluoroethylene ring 5 into a die cavity consisting of a bottom die 4 and a middle die 3.

a3, and covering the upper die 2 of the die.

a4, putting the weighed rubber material into the cavity of the upper die 2, and then covering the upper die cover 1.

and a5, placing the assembled mould on a flat vulcanizing machine for hot vulcanization molding to obtain a semi-finished product.

a6, trimming the semi-finished product of the fifth step to obtain residual rubber, and precisely machining and molding by using an outer diameter numerical control machine so as to ensure the size of the product.

The temperature required by vulcanization is 140-180 ℃ for 5-30 minutes, and the temperature required by the mold is 140-180 ℃ for 5-30 minutes.

The embodiment of the invention is as follows:

example one

As shown in fig. 1, the production method of the polytetrafluoroethylene film-coated O-shaped rubber sealing ring comprises the following specific steps:

the first step is as follows: the temperature of the press vulcanizer is set to a temperature required for vulcanizing a product, and the mold is placed on the press vulcanizer so that the temperature of the mold also reaches the required temperature.

The second step is that: and placing the polytetrafluoroethylene ring 5 into a die cavity formed by the bottom die 4 and the middle die 3.

The third step: the upper die 2 is covered.

A fourth step of: and putting the weighed rubber material into a cavity of an upper die 2, and covering an upper die cover 1.

The fifth step: and (4) putting the assembled mould on a flat vulcanizing machine for hot vulcanization molding to obtain a semi-finished product.

And a sixth step: and (5) trimming inner hole residual angles of the semi-finished product obtained in the fifth step, and machining and forming by using an outer diameter numerical control machine to ensure that the precision dimensional tolerance of the product is 0.05 mm.

The rubber semi-finished product is in a sheet shape, and the height of the polytetrafluoroethylene rubber ring is 1/3 of the size of the cavity of the middle die 3. External conditions required for molding: the rubber is thermally vulcanized at 140-180 ℃ for 5-30 minutes.

The rubber material of (1) includes: neoprene, fluororubber, nitrile rubber, silicone fluororubber, and natural rubber.

Example two

As shown in fig. 2, the method for producing the O-shaped rubber sealing ring internally wrapped with the polytetrafluoroethylene film comprises the following specific steps:

the first step is as follows: the temperature of the press vulcanizer is set to a temperature required for vulcanizing a product, and the mold is placed on the press vulcanizer so that the temperature of the mold also reaches the required temperature.

The second step is that: and placing the polytetrafluoroethylene ring 5 into a die cavity formed by the bottom die 4 and the middle die 3.

The third step: the upper die 2 of the die is covered.

A fourth step of: and putting the weighed rubber material into a cavity of an upper die 2, and covering an upper die cover 1.

The fifth step: and (4) putting the assembled mould on a flat vulcanizing machine for hot vulcanization molding to obtain a semi-finished product.

And a sixth step: and (5) trimming the semi-finished product in the fifth step to obtain the outer diameter residual glue, and machining and forming the inner diameter by using an inner diameter numerical control machine to precisely ensure the size of the product.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.