CN101653974A - A kind of rubber vulcanization method and equipment - Google Patents

Abstract

The present invention relates to a method for hot vulcanization of rubber products, specifically a method and equipment for vulcanizing rubber. First, a small amount of mixed rubber is wrapped around the workpiece, and then the workpiece is placed in the lower mold cavity of the mold. The upper mold and the lower mold are put together, and the feeding tank is placed at the glue injection port of the upper mold. A certain amount of mixed rubber is placed in the tank body, and then the core of the feeding tank is placed in the feeding tank, and then the exhaust nozzle is screwed on. Finally, the mold is placed in a vulcanizer and slowly pressurized. After the exhaust nozzle discharges glue, close the exhaust valve, continue to pressurize for 5 to 10 seconds (depending on the size of the workpiece), then stop pressurizing, and start to maintain pressure until the vulcanization time ends. The present invention is suitable for the vulcanization of rubber parts with and without cables. As a result, the internal structure of the rubber part is dense and solid, no bubbles are generated, the surface is smooth, and there is no glue deficiency.

Description

A kind of rubber vulcanization method and equipment

technical field

The invention relates to a method for thermal vulcanization of rubber products. Specifically, it is a method for thermal vulcanization of rubber products with cables.

Background technique

Generally, vulcanization is to put the mixed rubber directly into the mold cavity, close the mold and put it into the vulcanizer for thermal vulcanization, or wrap the workpiece with glue, then put it into the cavity, close the mold and put it into the vulcanizer for vulcanization. heat vulcanization. The specific method is: before the vulcanization of rubber products, the mold cavity needs to be heated and cleaned, and the mold release agent should be sprayed. Then put the mixed rubber into the mold cavity. If it is a product with cables, you need to wrap the glue first. The volume of the glue should be larger than the volume of the cavity. Then put the workpiece into the cavity, close the mold and put it Hot vulcanization in a vulcanizer. In the above cases, the fluidity of the rubber increases after heating. After the cavity is full, the rubber continues to flow outward along the overflow groove, so that the internal pressure of the workpiece will decrease, resulting in a certain amount of air bubbles, resulting in a lack of rubber. FIG. 2 is a schematic diagram of a rubber part produced in the prior art, and air bubbles 12 are generated in the workpiece 11 .

Contents of the invention

In order to solve the problems of the technologies described above, the object of the present invention is to provide a method for thermal vulcanization of rubber products and the equipment for realizing the method of the present invention. The specific scheme is:

A method for vulcanizing rubber, comprising the steps of:

(1). Wrap the mixed film on the workpiece, the volume should be smaller than the mold cavity;

(2). Put the wound workpiece into the lower mold of the mold;

(3). Combine the upper mold and the lower mold together;

(4). Place the feeding tank at the injection port of the upper mold;

(5). Put a certain amount of mixed rubber into the feeding tank;

(6). Put the core body of the feeding tank into the feeding tank;

(7). Screw the exhaust nozzle on the exhaust port of the upper mold, and open the exhaust valve;

(8). Put the mold into the middle of the flat vulcanizing machine;

(9). Slowly pressurize and observe the rubber strip discharged from the exhaust nozzle;

(10). Close the exhaust nozzle valve;

(11). Continue to pressurize slowly for 5-10 seconds. (depending on the size of the workpiece).

(12). Stop the pressurization and keep the pressure according to the curing time of the vulcanized rubber.

The invention also discloses a device for realizing the above method, which includes an upper mold and a lower mold; the upper mold is provided with an injection port, and a feeding tank is arranged on the injection port, and a core body is arranged in the feeding tank; the upper mold is provided with There is an exhaust port, and an exhaust valve is arranged on the exhaust port.

In order to process rubber products with cables, the upper and lower molds are also provided with cable clamping sleeves.

In order to process rubber products with workpieces and cables, the upper and lower molds are also provided with workpiece cavity.

This process invention has the following advantages:

①The effect of glue injection can be achieved without purchasing glue injection machine equipment. It saves the expense of purchasing glue injection equipment;

②Suitable for the production of small batches and precision rubber products;

③Suitable for the production of rubber products with cables;

④The vulcanized product has high strength, good internal structure density, no lack of glue and smooth surface;

⑤The qualified rate of products produced by this process is high;

⑥The application range is wide, suitable for the production of products with and without cables;

⑦ This process invention saves rubber during the vulcanization process and reduces the cost of the product.

Description of drawings

Fig. 1 is a schematic diagram of the equipment structure of the present invention;

Fig. 2 is a schematic structural diagram of the prior art.

Detailed ways

The present invention is described below in conjunction with accompanying drawing, as shown in Figure 1, equipment of the present invention comprises patrix 210, lower die 213; A core body 25 is provided; the upper mold 210 is provided with an exhaust nozzle 23, and the exhaust nozzle 23 is provided with an exhaust valve 21;

The upper mold 210 and the lower mold 213 are also provided with a cable clamping sleeve 211 for clamping the cable 212;

The upper mold 210 and the lower mold 213 are also provided with a cavity of the workpiece 24 .

The using method of the present invention is:

(1). Wrap the kneaded film on the workpiece 24, and the volume should be smaller than the mold cavity;

(2). Put the wound workpiece into the lower mold 213 of the mould;

(3). Combine the upper mold 210 and the lower mold 213 together;

(4). Place the feeding tank 26 at the injection port 28 of the upper mold 210;

(5). A certain amount of mixed rubber 27 is put into the feeding tank 26;

(6). Put the feeding tank core 25 into the feeding tank 26;

(7). Screw the exhaust nozzle 23 on the exhaust port of the upper mold 210, and open the exhaust nozzle valve 21;

(8). Put the mold into the middle of the vulcanization flat machine;

(9). Slowly pressurize and observe the rubber strip 22 discharged from the exhaust nozzle;

(10). Close the exhaust valve 21;

(11). Continue to pressurize slowly for 5 to 10 seconds; (depending on the size of the workpiece);

(12). Stop the pressurization and keep the pressure according to the curing time of vulcanized rubber;

(13). After the pressure holding is completed, the vulcanized workpiece 29 is taken out.

The workpiece processed by the method of the present invention is cut along the axial direction of the workpiece, and no air bubbles are found, and the surface is smooth and defect-free.

In this embodiment, the workpiece 24 is made of seawater-resistant stainless steel; the cable 212 can be purchased from the market according to technical requirements; the cable clamping sleeve 211 can be obtained by machining.

When using the present invention, it should be carried out under the condition that the volume of the rubber product is suitable.

Claims (4)

1. a vulcanization of rubber method is characterized in that: comprise the steps:

(1). the film that mixes is twined on workpiece, and volume is less than mold cavity;

(2). the workpiece that winds is put into the counterdie of mould;

(3). upper mould and counterdie are lumped together;

(4). place feed pot at patrix injection port place;

(5). a certain amount of elastomeric compound is put into feed pot;

(6). the feed pot core body is put into feed pot;

(7). exhaust nozzle is screwed on the exhaust outlet of patrix, opens drain tap;

(8). mould is put in the middle of the vulcanizing press;

(9). slowly the adhesive tape of discharging in the exhaust nozzle is observed in pressurization;

(10). close the exhaust nozzle valve;

(11). continue slowly to pressurize for 5～10 seconds;

(12). stop pressurization, carry out pressurize by the vulcanized rubber curing time.

2. an equipment of realizing the described method of claim 1 comprises upper die and lower die; Patrix is provided with injection port, on the described injection port feed pot is set, and is provided with core body in the described feed pot; Described patrix is provided with exhaust outlet, and described exhaust outlet is provided with drain tap.

3. equipment according to claim 2 is characterized in that: upper and lower mould also is provided with folder cable cover.

4. equipment according to claim 3 is characterized in that: upper and lower mould also is provided with workpiece cavity.

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