A novel perfluoroether rubber molding die

Abstract

This utility model relates to the field of rubber molding technology, specifically a novel perfluoroether rubber molding die, comprising an upper die and a lower die. The upper die and the lower die are respectively provided with an upper mold cavity and a lower mold cavity, which cooperate to form a molding cavity. The lower die has a retardation area for venting gas from the molding cavity; the retardation area is an annular structure located on the inner and outer sides of the molding cavity. The lower die also has a diversion area for accommodating excess rubber material. This utility model solves the problem of excess rubber material accumulating at the mold closing position during the mold closing process, leading to poor molding processability, and also solves the problem of incomplete gas venting from the cavity, which easily results in defective products during the molding process.

Description

Technical Field

[0001] This utility model relates to the field of rubber molding technology, specifically a novel perfluoroether rubber molding die. Background Technology

[0002] In the production of perfluoroether rubber products, the material is typically laid out and molded to complete the product molding process. During the mold closing process, if too much rubber is added, the excess rubber accumulates at the mold closing position, resulting in poor molding processability. Furthermore, if the gas in the cavity is not completely expelled, defective products are very likely to occur during the molding process, thus causing the product price to remain high and hindering the progress of domestic production. Utility Model Content

[0003] The purpose of this invention is to provide a novel perfluoroether rubber molding die, which solves the problem that excess rubber material accumulates at the mold closing position during the mold closing process, resulting in poor molding processability. It also solves the problem that gas in the cavity is not completely discharged, which easily leads to defective products during the molding process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a novel perfluoroether rubber molding die, comprising an upper die and a lower die, wherein the upper die and the lower die are respectively provided with an upper die cavity and a lower die cavity, the upper die cavity and the lower die cavity cooperate to form a molding cavity, the lower die is provided with a blocking area that can discharge gas in the molding cavity, the blocking area is a ring structure and is located on the inner and outer sides of the molding cavity, and the lower die is also provided with a diversion area that can accommodate excess rubber material.

[0005] With the above structural design, a perfluoroether rubber blank is laid in the molding cavity. When the product is vulcanized, the rubber material in the molding cavity is heated and becomes a fluid that diffuses to the surroundings. The gas and some excess rubber material in the molding cavity are discharged from the pressure relief cavity.

[0006] Preferably, the diversion zone includes a receiving cavity and a guiding channel, and the forming cavity and the receiving cavity are connected through the guiding channel.

[0007] With the above design, under the closing pressure of the upper and lower molds, the rubber material will flow to the distribution area, and the excess rubber material in the molding cavity will enter the receiving cavity through the guide channel to ensure the uniformity and stability of the product dimensions.

[0008] Preferably, two blocking zones are respectively provided on the inner and outer sides of the molding cavity. Each blocking zone contains multiple pressure relief chambers. The pressure relief chambers are distributed equidistantly around the center of the molding cavity, and the pressure relief chambers of adjacent blocking zones are staggered.

[0009] With the above design, due to the obstruction of the annular structure of the blocking zone, the gas and a small part of the rubber material in the molding cavity are discharged from the pressure relief cavity, while most of the rubber material is blocked in the molding cavity. At the same time, under the pressure of the molding cavity, the rubber material will actively flow to the diversion zone.

[0010] Preferably, the bottom of the pressure relief chamber has an inclined structure.

[0011] With the above structural design, the inclined structure of the pressure relief chamber will cause the rubber material in the pressure relief chamber to flow to the lower position. The lower position of each pressure relief chamber is circumferentially oriented towards the flow distribution area, thereby driving the rubber material in the molding cavity to flow towards the flow distribution area.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] A perfluoroether rubber preform is laid in the molding cavity. When the product is vulcanized, the rubber material in the molding cavity is heated and becomes fluid, diffusing outwards. Gas in the molding cavity is discharged through the pressure relief cavity to prevent product cracking. Due to the obstruction of the annular structure of the retardation zone, gas and a small portion of the rubber material in the molding cavity are discharged through the pressure relief cavity, while most of the rubber material is trapped in the molding cavity. At the same time, under the pressure of the molding cavity, the rubber material will actively flow towards the distribution zone. Excess rubber material in the molding cavity enters the receiving cavity through the guide channel. This saves rubber material while ensuring the uniformity and stability of product dimensions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the lower mold of this utility model;

[0015] Figure 2 After the mold of this utility model is closed Figure 1 A cross-sectional view at position AA in the middle;

[0016] Figure 3 After the mold of this utility model is closed Figure 1 A cross-sectional view at position BB in the middle;

[0017] Figure 4 After the mold of this utility model is closed Figure 1 A cross-sectional view at position CC. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 4This utility model provides a technical solution: a novel perfluoroether rubber molding die, including an upper die 5 and a lower die 4. The upper die 5 and the lower die 4 are respectively provided with an upper die cavity 11 and a lower die cavity 12. The upper die cavity 11 and the lower die cavity 12 cooperate to form a molding cavity 1. The molding cavity 1 has an O-shaped structure. The lower die 4 is provided with a blocking area 2 that can discharge gas in the molding cavity 1. The blocking area 2 has an annular structure and is located on the inner and outer sides of the molding cavity 1. The lower die 4 is also provided with a diversion area 3 that can accommodate excess rubber material.

[0020] The diversion zone 3 includes a receiving cavity 8 and a guiding channel 7, and the forming cavity 1 and the receiving cavity 8 are connected through the guiding channel 7.

[0021] Two blocking regions 2 are respectively provided on the inner and outer sides of the molding cavity 1. Each blocking region 2 contains multiple pressure relief chambers 6. The pressure relief chambers 6 are distributed equidistantly around the center of the molding cavity 1, and the pressure relief chambers 6 of two adjacent blocking regions 2 are staggered.

[0022] The bottom of the pressure relief chamber 6 is an inclined structure.

[0023] Working Principle: A perfluoroether rubber preform is laid in molding cavity 1. During vulcanization, the rubber material in molding cavity 1 is heated and becomes fluid, diffusing outwards. Gas and some excess rubber material in molding cavity 1 are discharged through pressure relief cavity 6. Due to the obstruction of the annular structure of the retardation zone 2, most of the rubber material is blocked in molding cavity 1. At the same time, under the pressure of molding cavity 1, the rubber material will actively flow towards the diversion zone 3. The inclined structure of pressure relief cavity 6 will cause the rubber material in pressure relief cavity 6 to flow towards the lower position. The lower position of each pressure relief cavity 6 is circumferentially oriented towards the diversion zone 3, which will help the rubber material in different positions in molding cavity 1 to flow towards the diversion zone 3. Under the mold closing pressure of upper mold 5 and lower mold 4, the rubber material will flow towards the diversion zone 3. Excess rubber material in molding cavity 1 enters the receiving cavity 8 through the guide channel 7 to ensure the uniformity and stability of product dimensions.

[0024] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new mould for perfluoroether rubber forming comprising an upper mould (5) and a lower mould (4), characterised in that: The upper mold (5) and the lower mold (4) are respectively provided with an upper mold cavity (11) and a lower mold cavity (12). The upper mold cavity (11) and the lower mold cavity (12) cooperate to form a molding cavity (1). The lower mold (4) is provided with a blocking area (2) that can discharge gas in the molding cavity (1). The blocking area (2) is a ring structure and is located on the inner and outer sides of the molding cavity (1). The lower mold (4) is also provided with a diversion area (3) that can accommodate excess rubber material.

2. A novel perfluoroether rubber molding die according to claim 1, characterized by: The diversion zone (3) includes a receiving cavity (8) and a guiding channel (7), and the forming cavity (1) and the receiving cavity (8) are connected through the guiding channel (7).

3. A novel perfluoroether rubber molding die according to claim 1, characterized by: The molding cavity (1) has two blocking zones (2) on its inner and outer sides respectively. Each blocking zone (2) contains multiple pressure relief chambers (6). The pressure relief chambers (6) are distributed equidistantly around the center of the molding cavity (1), and the pressure relief chambers (6) of two adjacent blocking zones (2) are staggered.

4. A novel perfluoroether rubber molding die according to claim 3, characterized by: The bottom of the pressure relief chamber (6) is an inclined structure.

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