Production mold for rubber product and method for producing rubber product

Abstract

The invention relates to a production mold for a rubber product and a method for producing the rubber product. The production mold for the rubber product comprises an upper mold plate and a lower moldplate. A rubber product cavity and a sealing ring cavity are formed after the upper mold plate and the lower mold plate are assembled. The lower mold plate is provided with exhaust holes and suctionholes. The suction holes communicate with the exhaust holes. The method for producing the rubber product through the production mold for the rubber product comprises the steps of injection molding, vulcanization, vacuumizing, and vulcanization forming. According to the production mold for the rubber product, the mold is connected with a vacuum pump, so that an inner cavity of the mold is vacuumized rapidly, the investment of production equipment for rubber products is reduced, the production efficiency can be improved, and labor cost and energy consumption are reduced; and meanwhile, the surface of the obtained rubber product is smooth and free of bubbles, the appearance of the rubber product is full, and production requirements are met.

Description

technical field

[0001] The invention relates to rubber production technology, in particular to a mold for producing rubber products and a method for preparing rubber products. Background technique

[0002] Rubber vulcanization is the process of adding cross-linking aids such as vulcanizing agents and accelerators to rubber to transform linear macromolecules into three-dimensional network structures under certain temperature and pressure conditions. It is a must for most rubber products. craft.

[0003] In the prior art, a flat vulcanizer is used for rubber vulcanization. When the rubber product is thick or has a complex shape, it needs to be vulcanized and formed under vacuum conditions. In a vacuum state, the rubber has better fluidity and irregular structure products are easier to form. At the same time, the generation of a large number of air bubbles can be avoided. A flat vulcanizer is used with a vacuum machine. When vacuuming, the mold is clamped and put into the vac...

Examples

Embodiment 1

[0031] refer to Figure 1-Figure 3 , a production mold of a rubber product, the rubber product is a cylinder gasket, the production mold of the rubber product can produce 3 cylinder gaskets at a time, including an upper template 1 and a lower template 2, the upper template 1 and the lower template The template 2 is molded together to form a rubber product cavity and a sealing ring cavity surrounding the rubber product cavity, and the rubber product cavity is three cylinder gasket cavities arranged side by side.

[0032] In the present invention, the rubber product is not limited to the cylinder gasket, and correspondingly, the cavity of the rubber product is not limited to the cylinder gasket cavity. The number of products produced by a single mold at one time is not limited to 3, and can be adjusted according to the design situation. If a single mold is required to produce 5 rubber products at a time, it is enough to arrange 5 rubber product cavities in the mold.

[0033] T...

Embodiment 2

[0040] Utilize the mold production rubber product among the embodiment 1, step is as follows:

[0041] (1) Clamp the upper template 1 and the lower template 2, inject the mixed second rubber compound from the second rubber injection hole 43, vulcanize and form, obtain the sealing ring, vulcanize The temperature is 120°C, vulcanized under normal pressure;

[0042] (2) Inject the kneaded first rubber compound from the injection hole 33 of the first compound, vulcanize for 3 minutes, the vulcanization temperature is 170° C., and vulcanize under normal pressure to obtain a crude rubber product;

[0043] (3) Connect the air suction port 5 on the lower template 2 to a vacuum pump, vacuumize for 1 minute, and set the vacuum degree to 10 Pa, and continue vulcanizing and molding the crude rubber product in the step (2) to obtain a rubber product.

[0044] Utilize the production method of the rubber product described in the present invention, use the mold to connect the vacuum pump to ...

Embodiment 3

[0046] Utilize the mold production rubber product among the embodiment 1, step is as follows:

[0047] (1) inject the mixed first rubber compound from the first rubber compound injection hole 33, vulcanize for 5 minutes, the vulcanization temperature is 120 ° C, vulcanize at normal pressure, and obtain the rough product of rubber products; the sealing ring cavity A sealing ring is installed inside;

[0048] (2) Connect the air suction port 5 on the lower template 2 to a vacuum pump, vacuumize for 2 minutes, and set the vacuum degree to 200 Pa, and continue vulcanizing and molding the crude rubber product in the step (1) to obtain a rubber product.

[0049] Utilize the production method of the rubber product described in the present invention, use the mold to connect the vacuum pump to quickly complete the vacuuming of the cavity in the mold, which not only reduces the investment in production equipment for rubber products, but also improves production efficiency, saves labor c...

technical field

[0001] The invention relates to rubber production technology, in particular to a mold for producing rubber products and a method for preparing rubber products. Background technique

[0002] Rubber vulcanization is the process of adding cross-linking aids such as vulcanizing agents and accelerators to rubber to transform linear macromolecules into three-dimensional network structures under certain temperature and pressure conditions. It is a must for most rubber products. craft.

[0003] In the prior art, a flat vulcanizer is used for rubber vulcanization. When the rubber product is thick or has a complex shape, it needs to be vulcanized and formed under vacuum conditions. In a vacuum state, the rubber has better fluidity and irregular structure products are easier to form. At the same time, the generation of a large number of air bubbles can be avoided. A flat vulcanizer is used with a vacuum machine. When vacuuming, the mold is clamped and put into the vac...

Examples

Embodiment 1

[0031] refer to Figure 1-Figure 3 , a production mold of a rubber product, the rubber product is a cylinder gasket, the production mold of the rubber product can produce 3 cylinder gaskets at a time, including an upper template 1 and a lower template 2, the upper template 1 and the lower template The template 2 is molded together to form a rubber product cavity and a sealing ring cavity surrounding the rubber product cavity, and the rubber product cavity is three cylinder gasket cavities arranged side by side.

[0032] In the present invention, the rubber product is not limited to the cylinder gasket, and correspondingly, the cavity of the rubber product is not limited to the cylinder gasket cavity. The number of products produced by a single mold at one time is not limited to 3, and can be adjusted according to the design situation. If a single mold is required to produce 5 rubber products at a time, it is enough to arrange 5 rubber product cavities in the mold.

[0033] T...

Embodiment 2

[0040] Utilize the mold production rubber product among the embodiment 1, step is as follows:

[0041] (1) Clamp the upper template 1 and the lower template 2, inject the mixed second rubber compound from the second rubber injection hole 43, vulcanize and form, obtain the sealing ring, vulcanize The temperature is 120°C, vulcanized under normal pressure;

[0042] (2) Inject the kneaded first rubber compound from the injection hole 33 of the first compound, vulcanize for 3 minutes, the vulcanization temperature is 170° C., and vulcanize under normal pressure to obtain a crude rubber product;

[0043] (3) Connect the air suction port 5 on the lower template 2 to a vacuum pump, vacuumize for 1 minute, and set the vacuum degree to 10 Pa, and continue vulcanizing and molding the crude rubber product in the step (2) to obtain a rubber product.

[0044] Utilize the production method of the rubber product described in the present invention, use the mold to connect the vacuum pump to ...

Embodiment 3

[0046] Utilize the mold production rubber product among the embodiment 1, step is as follows:

[0047] (1) inject the mixed first rubber compound from the first rubber compound injection hole 33, vulcanize for 5 minutes, the vulcanization temperature is 120 ° C, vulcanize at normal pressure, and obtain the rough product of rubber products; the sealing ring cavity A sealing ring is installed inside;

[0048] (2) Connect the air suction port 5 on the lower template 2 to a vacuum pump, vacuumize for 2 minutes, and set the vacuum degree to 200 Pa, and continue vulcanizing and molding the crude rubber product in the step (1) to obtain a rubber product.

[0049] Utilize the production method of the rubber product described in the present invention, use the mold to connect the vacuum pump to quickly complete the vacuuming of the cavity in the mold, which not only reduces the investment in production equipment for rubber products, but also improves production efficiency, saves labor c...

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