WO2014012331A1

WO2014012331A1 - Rubber layer molded product and manufacturing method thereof

Info

Publication number: WO2014012331A1
Application number: PCT/CN2012/086479
Authority: WO
Inventors: 廖小平
Original assignee: Liao Xiaoping
Priority date: 2012-07-19
Filing date: 2012-12-13
Publication date: 2014-01-23
Also published as: CN102742983A; CN102742983B

Abstract

Disclosed are a rubber layer molded product and a manufacturing method thereof. The product comprises a main body molded by a silicon rubber material, fabrics being integrally solidified on a surface of the main body. The manufacturing method thereof is: a first step, preparing raw materials; a second step, placing the fabrics into a cavity of a hot-forming mold; a third step, placing silicon rubber into the cavity of the mold, performing hot-forming after closing the mold, performing hot-forming on the silicon rubber to form a silicon rubber blank, and vulcanizing the silicon rubber at the same time; and integrally solidifying the fabrics on a surface of the silicon rubber blank under hot-forming and vulcanizing conditions; and a fourth step, trimming to obtain a final product. The silicon rubber in the present invention generally adopts transparent silicon rubber with a high transparency, a low extension, and a wide application range, and the fabrics generally adopt chemical fiber fabrics that have a high elasticity and a high temperature resistance and do not discolor at high temperature. The fabrics are integrally solidified on the surface of the main body of the silicon rubber product through hot-forming, in this way, the advantages of the silicon rubber product are kept, and at the same time, the mechanical properties of the silicon rubber product can be enhanced through the fabrics, so as to greatly improve the tear resistance and the tensile strength properties of the silicon rubber product and prolong the service life of the product.

Description

Rubber layer molded product and manufacturing method thereof

Technical field

The invention relates to the technical field of a silicone rubber product and a production method thereof, and particularly relates to a manufacturing method of a rubber layer molded product which is formed by hot pressing of a mold.

Background technique

Conventional straps are mostly made of metal or leather materials, and the straps made of metal materials have a complicated processing process and high cost. At present, some people use rubber materials to make the strap. The rubber material is softer in texture and is comfortable as a strap.

At present, the manufacturer has made a strap made of silicone rubber material. The strap is molded at one time and has a groove for assembling the movement of the watch. This design greatly simplifies the manufacturing process of the watch, facilitates assembly, and has a movement. Can be used with a variety of different watch bands. However, this silicone rubber watch band also has certain deficiencies. Although silicone rubber has many advantages, such as heat resistance, low temperature resistance, and aging resistance, the mechanical properties of silicone rubber itself such as tensile strength and tear strength are poor, especially After long-term use, its physical and mechanical new energy is not as good as most synthetic rubber. For this reason, the strap made of silicone rubber has a short service life and is prone to breakage after a certain period of use. Based on this situation, the inventors have been studying how to improve the mechanical properties of silicone rubber products (such as straps) to improve the service life of the products.

Summary of the invention

The first technical problem to be solved by the present invention is to provide a rubber-faced molded product which can improve the mechanical properties of the product in order to overcome the shortcomings of the current silicone rubber products.

In order to solve the above first technical problem, the present invention adopts the following technical solution: it comprises a body molded by a silicone rubber material, and a fabric fabric is integrally cured on the surface of the body.

Further, in the above technical solution, the body is in the form of a strap, and includes: a cavity in the middle and a strap extending from both ends of the cavity; the upper and lower surfaces of the strip form a continuous and uniform convex Up or down.

Further, in the above technical solution, the fabric fabric is cured by heat pressing on the surface of the body.

A second technical problem to be solved by the present invention is to provide a method of producing the above article. The technical scheme adopted is as follows: the first step is to prepare raw materials, the raw material is hot vulcanizable silicone rubber; the second step is to place the fabric fabric in the cavity of the hot press forming mold; the third step is to put the silicone rubber The mold is placed in the cavity of the above mold, and the mold is pressed and then hot pressed, so that the silicone rubber is hot pressed into the silicone rubber blank and vulcanized at the same time; the fabric is integrally cured on the surface of the silicone rubber blank under hot pressing and vulcanization conditions; Step, trim, trim the vulcanized silicone rubber blank, remove the burrs, and obtain the final product.

Further, in the above technical solution, the silicone rubber selected in the first step includes: a methyl vinyl silicone rubber, a silica as a vulcanizing agent, and a peroxide as a bridging agent.

Further, in the above technical solution, after the finished product is obtained, the surface of the finished product is sprayed with the sensible oil, and the sensation oil is added with the scent.

Further, in the above technical solution, the touch oil is a bright or matte ink of a silicone rubber, and the ink is a silicone compound.

Further, in the above technical solution, the woven fabric is a non-woven fabric or gauze made of a chemical fiber material.

Further, in the above technical solution, the silicone rubber is added with a pigment.

Further, in the above technical solution, in the third step, the molding pressure after the mold clamping is at least 100 tons; wherein the heating temperature is: upper mold 160-200 degrees Celsius; lower mold 150-200 degrees Celsius; vulcanization; The time is 150-180 seconds.

The silicone rubber of the present invention generally employs a wide range of transparent silicone rubbers which are highly transparent and low stretchable, for example, methyl vinyl silicone rubber. Fabric fabrics generally use high-elasticity, high-temperature resistant, and chemical fiber fabrics that do not change color at high temperatures. The fabric fabric is integrally cured on the surface of the silicone rubber product body by hot pressing, thus retaining the advantages of the silicone rubber product itself. At the same time, the mechanical properties of the silicone rubber product can be enhanced by the fabric fabric, so that the tear resistance and the tensile strength are greatly improved, and the service life of the product is increased.

The manufacturing process of the invention is simple, It will not increase the cost of silicone rubber products too much, but at the same time, the performance of the products will be greatly improved. In addition, the present invention can also apply a flavoring oil to the silicone rubber product to add flavor to the product, thereby further improving the grade of the product.

DRAWINGS

Figure 1 is a front elevational view of a silicone rubber article of the present invention;

Figure 2 is a schematic view showing the structure of a silicone rubber article of the present invention.

detailed description

As shown in FIG. 1 and FIG. 2, this embodiment is to manufacture a watchband silicone rubber product, which comprises a watch body 1 molded by using a silicone rubber material, and a cavity 11 is formed in the middle of the body, and the cavity 11 can be used. The watch movement is placed, and the movement is formed by the cavity 11. The

strip bodies

12, 13 are integrally formed at both ends of the cavity 11. The upper and lower surfaces of the

belt bodies

12, 13 form continuous, uniform protrusions or depressions. When the

belt bodies

12, 13 are bent, the bending is formed by these recessed positions, so that stress concentration can be avoided and the belt body can be broken.

A fabric 2 is integrally cured on the surface of the body 1. The woven fabric 2 is cured by heat pressing on the surface of the body 1.

The following is a specific production method of the present invention:

In the first step, a raw material is prepared, which is a heat-vulcanizable silicone rubber. In connection with this example, a methyl vinyl silicone rubber was selected which used synthetic silica as a vulcanizing agent while adding a small amount of peroxide as a bridging agent.

In the second step, the fabric is placed in the cavity of the hot press forming mold.

The hot press forming apparatus used in the hot press forming mold of the present invention performs mold opening according to a product to be processed, and the mold includes an upper mold and a lower mold. The fabric fabric is cut according to the shape of the mold cavity to obtain a fabric fabric corresponding to the shape of the cavity, and placed in the cavity of the lower mold. The woven fabric is a non-woven fabric or gauze made of chemical fiber material.

In the third step, the appropriate silicone rubber is placed in the cavity of the mold, and the mold is pressed and then hot pressed. The silicone rubber is vulcanized in a heated environment. At the same time, a certain pressure is applied to the mold, usually the pressure should be at least 100 tons. The heating temperature is: upper mold 160-200 degrees Celsius, preferably 180 degrees Celsius; lower mold 150-200 degrees Celsius, preferably 170 degrees Celsius, vulcanization time 150-180 seconds, so that the silicone rubber is formed under the hot pressing condition in the mold cavity Silicone rubber blank products. Since the fabric is placed at the bottom of the cavity, it is integrally cured on the surface of the silicone rubber under hot pressing and vulcanization conditions.

The fourth step, trimming. After vulcanization and molding, the mold is opened, the silicone rubber blank is taken out, trimmed, and the burrs are removed to obtain the final product.

In the fifth step, after the finished product is obtained, the surface of the finished product is sprayed with a sensation of oil, and the sensation oil is added with a fragrance. The hand oil is a glossy or matte ink of silicone rubber, and the ink is a silicone compound.

Further, a pigment is added to the silicone rubber raw material. The pigment is a toner, which can be an organic pigment and an inorganic pigment. Commonly used organic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast red, macromolecular red, macromolecular yellow, permanent yellow , permanent purple, azo red and so on. Commonly used inorganic pigments are: cadmium red, cadmium yellow, titanium white powder, carbon black, iron oxide red, iron oxide yellow and the like.

In the above embodiment, the fabric fabric is placed only in the cavity of the lower mold, and the fabric fabric can also be placed in the cavity of the upper mold at the same time, so that the upper and lower surfaces of the finally formed silicone rubber product are integrally cured to form a fabric fabric.

The product produced in the above embodiment is a watch band, which can also be made into other products as needed. The product produced by the method can not only improve the mechanical properties of the strong silicone rubber product, but also greatly improve the tear resistance and tensile strength. Increase the life of the product. In addition, it can also increase the wear resistance of the product.

The above description is only intended to be an exemplification of the invention, and is not intended to limit the scope of the present invention. The equivalent changes or modifications of the structures, features and principles described in the claims of the present invention should be included in the present invention. Within the scope of the patent application.

Claims

A molded product of a rubber layer, comprising: a body (1) molded by a silicone rubber material, wherein a fabric fabric (2) is integrally cured on a surface of the body (1).

The rubber-faced molded article according to claim 1, characterized in that the body (1) is in the form of a band comprising: a cavity (11) in the middle and two ends of the cavity (11) The extended strips (12, 13), the upper and lower surfaces of the strips (12, 13) form continuous, uniform protrusions or depressions.

The rubber layer molded article according to claim 1 or 2, characterized in that the woven fabric (2) is cured by heat pressing on the surface of the body (1).

4. A method of manufacturing a rubber layer molded article, the method comprising the steps of:

In the first step, the raw material is prepared, and the raw material is a heat-vulcanizable silicone rubber;

In the second step, the fabric fabric is placed in the cavity of the hot press forming mold;

In the third step, the silicone rubber is placed in the cavity of the above mold, and the mold is pressed and then hot pressed, so that the silicone rubber is hot pressed into the silicone rubber blank and simultaneously vulcanized; the fabric is integrally cured under hot pressing and vulcanization conditions. The surface of the silicone rubber blank;

The fourth step, trimming, trimming the vulcanized silicone rubber blank to remove the burrs to obtain the final product.

The method of manufacturing a rubber-faced molded article according to claim 4, wherein the silicone rubber selected in the first step comprises: methyl vinyl silicone rubber, and silica as a vulcanizing agent. And as a peroxide for the bridging agent.

The method for producing a rubber-mesh molded article according to claim 4 or 5, characterized in that after the finished product is obtained, a sensible oil is sprayed on the surface of the finished product, and the scented oil is added with the scent.

The method of manufacturing a rubber-faced molded article according to claim 6, wherein the handle oil is a bright or matte ink of a silicone rubber, and the ink is a silicone compound.

The method of manufacturing a rubber layer molded article according to claim 6, wherein the woven fabric is a non-woven fabric or gauze made of a chemical fiber material.

A method of producing a rubber-faced molded article according to claim 6, wherein a pigment is added to said silicone rubber.

The method for manufacturing a rubber layer molded article according to claim 6, wherein in the third step, the molding pressure after the mold clamping is at least 100 tons; wherein the heating temperature is: the upper mold 160 -200 degrees Celsius; lower mold 150-200 degrees Celsius; vulcanization time 150-180 seconds.