Perfluoroether O-shaped ring and forming die thereof

Abstract

The perfluoroether O-shaped ring forming die is characterized in that a lower die cavity is formed in the top of a lower die plate, an upper die cavity is formed in the bottom of an upper die plate, and the upper die cavity and the lower die cavity are matched to form an O-shaped ring cavity; an exhaust groove is further formed in the top of the lower die plate, and an exhaust through hole is formed in the bottom of the exhaust groove; a lower supporting boss is arranged at the top of the lower die plate, and / or an upper supporting boss matched with the lower supporting boss is arranged at the bottom of the upper die plate. According to the optimally-designed forming mold, the supporting bosses are matched with the opposite mold plates during mold closing, the mold closing pressure can be fixed, a gap is formed between the edges of the upper mold cavity and the lower mold cavity, redundant rubber materials are prevented from being accumulated at the mold closing position, meanwhile, gas in the middle of an O-shaped ring is exhausted through the exhaust grooves and the exhaust holes, and the sealing effect is good. And overflowing glue in the middle of the O-shaped ring during mold closing is contained, so that cracking of O-shaped ring products is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of perfluoroether O-ring processing, in particular to a perfluoroether O-ring and a molding die thereof. Background Art

[0002] During the production process, perfluoroether O-ring products are usually formed by swinging the material while precisely controlling the material weight. During the mold closing process, the raw material is unevenly filled in the cavity, which will cause defects in the molding of the perfluoroether O-ring. Cracking of perfluoroether O-ring products is one of the main reasons why the product qualification rate cannot meet the standard. Product cracking usually occurs at the mold closing line. This is because when the rubber weight is excessive, the excess rubber accumulates at the mold closing position of the mold, and the gas in the cavity is not completely discharged. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a perfluoroether O-ring and a molding die thereof.

[0004] The present invention provides a perfluoroether O-ring forming mold, comprising: an upper mold plate and a lower mold plate;

[0005] A lower mold cavity is provided at the top of the lower mold plate, and an upper mold cavity is provided at the bottom of the upper mold plate. The upper mold cavity and the lower mold cavity cooperate to form an O-ring cavity; an exhaust groove is also provided at the top of the lower mold plate, and an exhaust through hole is provided at the bottom of the exhaust groove;

[0006] A lower supporting boss is provided at the top of the lower template, and / or an upper supporting boss is provided at the bottom of the upper template.

[0007] Preferably, the exhaust groove has a connecting structure distributed around the central circumference of the O-ring cavity.

[0008] Preferably, the lower template is provided with a plurality of lower supporting bosses, which are distributed around the central circumference of the O-ring cavity; and / or, the upper template is provided with a plurality of upper supporting bosses, which are distributed around the central circumference of the O-ring cavity.

[0009] Preferably, the lower supporting boss comprises a lower inner boss body and a lower outer boss body respectively located inside and outside the lower mold cavity; and / or, the upper supporting boss comprises an upper inner boss body and an upper outer boss body respectively located inside and outside the upper mold cavity.

[0010] Preferably, an upper tearing edge groove arranged around the upper mold cavity is further provided at the bottom of the upper mold plate, and a lower tearing edge groove arranged around the lower mold cavity is further provided at the top of the lower mold plate.

[0011] Preferably, it also includes a mold opening assembly, which includes a supporting spring and a mold bolt. A receiving groove is provided at the bottom of the upper mold plate, and a mounting through hole is provided on the lower mold plate. The supporting spring is located in the receiving groove, and one end of the mold bolt passes through the mounting through hole and upward through the supporting spring to be threadedly connected to the upper mold plate.

[0012] Preferably, it comprises a plurality of mold opening components, and the plurality of mold opening components are distributed circumferentially around the O-ring cavity.

[0013] Preferably, it further comprises a positioning assembly, the positioning assembly comprising a positioning column and a positioning ring;

[0014] The positioning column is installed at the bottom of the upper template, and a mounting groove is provided at the top of the lower template. The positioning ring is located in the mounting groove, and the middle of the positioning ring has a positioning groove that matches the positioning column.

[0015] Or, the positioning column is installed on the top of the lower template, and a mounting groove is provided at the bottom of the upper template. The positioning ring is located in the mounting groove, and the middle of the positioning ring has a positioning groove that matches the positioning column;

[0016] Preferably, the positioning column is mounted on the upper supporting boss, and the positioning ring is mounted on the lower supporting boss;

[0017] Alternatively, the positioning column is mounted on the lower supporting boss, and the positioning ring is mounted on the upper supporting boss.

[0018] Preferably, the positioning column comprises a mounting portion, a positioning portion and a guide portion which are connected in sequence, the positioning portion matches the shape of the positioning groove, and the outer diameter of the guide portion gradually decreases in a direction away from the positioning portion.

[0019] The present invention also provides a perfluoroether O-ring formed by the perfluoroether O-ring forming mold.

[0020] In the present invention, the proposed perfluoroether O-ring and its molding mold have a lower mold cavity at the top of the lower mold plate, an upper mold cavity at the bottom of the upper mold plate, and the upper mold cavity and the lower mold cavity cooperate to form an O-ring mold cavity; the lower mold plate is also provided with an exhaust groove at the top, and an exhaust through hole at the bottom of the exhaust groove; the lower mold plate is provided with a lower support boss at the top, and or the upper mold plate is provided with an upper support boss that cooperates with the lower support boss at the bottom. Through the above-mentioned optimized design of the molding mold, the mold closing pressure can be fixed by the support boss cooperating with the relative mold plate during mold closing, forming a gap between the upper and lower mold cavity edges to avoid the accumulation of excess rubber at the mold closing position, and at the same time, the gas in the middle of the O-ring is discharged through the exhaust groove and the exhaust hole, and is used to accommodate the overflow of glue in the middle of the O-ring during mold closing, thereby reducing the cracking of the O-ring product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic structural diagram of an implementation of a molding die for a perfluoroether O-ring according to the present invention.

[0022] Figure 2 This is a partially enlarged schematic diagram of a lower mold plate of an embodiment of a molding die for a perfluoroether O-ring proposed by the present invention.

[0023] Figure 3 This is another structural schematic diagram of an implementation manner of a molding die for a perfluoroether O-ring proposed by the present invention.

[0024] Figure 4 This is a partial schematic diagram of the cooperation of the upper and lower templates in one embodiment of a molding die for a perfluoroether O-ring proposed by the present invention. DETAILED DESCRIPTION

[0025] like Figures 1 to 4 As shown, Figure 1 A structural schematic diagram of an embodiment of a molding die for a perfluoroether O-ring proposed by the present invention, Figure 2 This is a partially enlarged schematic diagram of a lower mold plate of an embodiment of a molding die for a perfluoroether O-ring proposed by the present invention. Figure 3 This is another structural schematic diagram of an embodiment of a molding die for a perfluoroether O-ring proposed by the present invention. Figure 4 This is a partial schematic diagram of the cooperation of the upper and lower templates in one embodiment of a molding die for a perfluoroether O-ring proposed by the present invention.

[0026] Reference Figure 1 and 3 The present invention provides a perfluoroether O-ring forming mold, comprising: an upper mold plate 10 and a lower mold plate 20;

[0027] A lower mold cavity 21 is provided at the top of the lower mold plate 20, and an upper mold cavity 11 is provided at the bottom of the upper mold plate 10. The upper mold cavity 11 and the lower mold cavity 21 cooperate to form an O-ring cavity; an exhaust groove 22 is also provided at the top of the lower mold plate 20, and the exhaust groove 22 is located inside the O-ring cavity. An exhaust through hole 23 is provided at the bottom of the exhaust groove 22;

[0028] A lower supporting boss is provided on the top of the lower template 20. An upper supporting boss can also be provided on the bottom of the upper template 10.

[0029] In the molding process of the perfluoroether O-ring of this embodiment, the perfluoroether raw material of a preset weight is placed in the lower mold cavity, and the upper and lower molds are closed until the supporting boss contacts the relative mold, and the mold is closed, so that the raw material is molded in the mold cavity. During the mold closing process, the gas between the upper and lower molds in the middle of the O-ring is discharged through the exhaust groove and the exhaust through hole, so that the pressure inside and outside the O-ring is equal. After the mold is opened, the O-ring product is obtained.

[0030] In this embodiment, the proposed perfluoroether O-ring and its molding mold have a lower mold cavity at the top of the lower mold plate, an upper mold cavity at the bottom of the upper mold plate, and the upper mold cavity and the lower mold cavity cooperate to form an O-ring mold cavity; the lower mold plate is also provided with an exhaust groove at the top, and an exhaust through hole is provided at the bottom of the exhaust groove; the lower mold plate is provided with a lower support boss at the top, and or the upper mold plate is provided with an upper support boss that cooperates with the lower support boss at the bottom. Through the above-mentioned optimized design of the molding mold, the mold closing pressure can be fixed by the support boss cooperating with the relative mold plate during mold closing, forming a gap between the upper and lower mold cavity edges to avoid the accumulation of excess rubber at the mold closing position, and at the same time, the gas in the middle of the O-ring is discharged through the exhaust groove and the exhaust hole, and is used to accommodate the overflow of glue in the middle of the O-ring during mold closing, thereby reducing the cracking of the O-ring product.

[0031] Reference Figure 1 and 2 In a specific embodiment, the exhaust groove 22 has a connecting structure distributed around the central circumference of the O-ring cavity, which facilitates the rapid and uniform exhaust of the gas inside the O-ring and reduces the inner edge defects of the O-ring mold line.

[0032] In the specific setting mode of the upper and lower supporting bosses, a plurality of lower supporting bosses are provided on the lower mold plate 20, and the plurality of lower supporting bosses are distributed around the central circumference of the O-ring cavity. By arranging supporting bosses in multiple places, it is ensured that the gaps at various positions of the cavity are uniform when the mold is closed. Alternatively, a plurality of upper supporting bosses are provided on the upper mold plate 10, and the plurality of upper supporting bosses are distributed around the central circumference of the O-ring cavity. Similarly, in other specific embodiments, the lower supporting boss includes a lower inner boss body 24 and a lower outer boss body 25 respectively located inside and outside the lower mold cavity 21, and / or the upper supporting boss includes an upper inner boss body and an upper outer boss body respectively located inside and outside the upper mold cavity 11.

[0033] Reference Figure 1 and 3 In order to facilitate the removal of flash at the parting line of the product during demoulding, an upper tearing groove 12 is provided around the upper mold cavity 11 at the bottom of the upper mold 10, and a lower tearing groove 26 is provided around the lower mold cavity 21 at the top of the lower mold 20.

[0034] In addition, refer to Figure 4 The perfluoroether O-ring forming mold of this embodiment also includes a mold opening assembly, which includes a support spring 31 and a mold clamping bolt 32. A receiving groove is provided at the bottom of the upper mold plate 10, and a mounting through hole is provided on the lower mold plate 20. The support spring 31 is located in the receiving groove, and one end of the mold clamping bolt 32 passes through the mounting through hole and upward through the support spring 31 to be threadedly connected with the upper mold plate 10. When the mold is closed, the upper and lower mold plates are fixedly connected by the mold clamping bolt, and at this time, the support spring is in a compressed state. When the mold is opened, the mold clamping bolt is removed, and the upper mold plate is lifted up by the support spring, so that the upper mold is automatically demolded.

[0035] In the specific arrangement of the mold opening components, the molding die set of this embodiment includes a plurality of mold opening components, and the plurality of mold opening components are distributed circumferentially around the O-ring cavity.

[0036] In other specific embodiments, the perfluoroether O-ring molding die of this embodiment further includes a positioning assembly, which includes a positioning column 41 and a positioning ring 42;

[0037] The positioning column 41 is installed at the bottom of the upper template 10, and a mounting groove is provided at the top of the lower template 20. The positioning ring 42 is located in the mounting groove, and the middle of the positioning ring 42 has a positioning groove that matches the positioning column 41; or, the positioning column 41 is installed at the top of the lower template 20, and a mounting groove is provided at the bottom of the upper template 10. The positioning ring 42 is located in the mounting groove, and the middle of the positioning ring 42 has a positioning groove that matches the positioning column 41. The positioning of the upper and lower templates is ensured by the positioning column and the positioning ring.

[0038] In a further specific embodiment, the positioning post 41 is mounted on the upper support boss, and the positioning ring 42 is mounted on the lower support boss; or, the positioning post 41 is mounted on the lower support boss, and the positioning ring 42 is mounted on the upper support boss.

[0039] In order to improve the positioning accuracy of the upper and lower templates, in another specific embodiment, the positioning column 41 includes a mounting portion, a positioning portion and a guide portion connected in sequence, the positioning portion matches the shape of the positioning groove, and the outer diameter of the guide portion gradually decreases away from the positioning portion. When the positioning column cooperates with the positioning ring, preliminary positioning is performed through the guide portion, and as the guide portion is inserted into the positioning ring, the positioning portion and the positioning groove in the positioning ring are accurately positioned.

[0040] This embodiment also provides a perfluoroether O-ring formed by the above-mentioned perfluoroether O-ring forming mold. The O-ring product is formed by the above-mentioned forming mold, which simplifies the forming process, the mold pressure can be fixed, and there is no excess rubber accumulation at the mold line, reducing the risk of cracking. At the same time, the exhaust groove effectively exhausts and plays a role in overflowing glue, ensuring the quality of the inner and outer edges of the mold line of the product.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A molding die for a perfluoroether O-ring, characterized in that: include: An upper template (10) and a lower template (20); A lower mold cavity (21) is provided at the top of the lower mold plate (20), and an upper mold cavity (11) is provided at the bottom of the upper mold plate (10), wherein the upper mold cavity (11) and the lower mold cavity (21) cooperate to form an O-ring cavity; The top of the lower template (20) is also provided with an exhaust groove (22), the exhaust groove (22) is located inside the O-ring cavity, and the bottom of the exhaust groove (22) is provided with an exhaust through hole (23); A lower supporting boss is provided at the top of the lower template (20), and / or an upper supporting boss is provided at the bottom of the upper template (10).

2. The perfluoroether O-ring forming die according to claim 1, characterized in that: The exhaust groove (22) has a communication structure distributed around the central circumference of the O-ring cavity.

3. The perfluoroether O-ring forming die according to claim 1, characterized in that: The lower template (20) is provided with a plurality of lower support bosses, which are distributed around the central circumference of the O-ring cavity; and / or, the upper template (10) is provided with a plurality of upper support bosses, which are distributed around the central circumference of the O-ring cavity.

4. The perfluoroether O-ring forming mold according to claim 1, characterized in that: The lower supporting boss comprises a lower inner boss body (24) and a lower outer boss body (25) respectively located inside and outside the lower mold cavity (21); and / or, the upper supporting boss comprises an upper inner boss body and an upper outer boss body respectively located inside and outside the upper mold cavity (11).

5. The perfluoroether O-ring forming mold according to claim 1, characterized in that: The bottom of the upper mold plate (10) is also provided with an upper tearing groove (12) arranged around the upper mold cavity (11), and the top of the lower mold plate (20) is also provided with a lower tearing groove (26) arranged around the lower mold cavity (21).

6. The perfluoroether O-ring forming mold according to claim 1, characterized in that: The mold opening assembly also includes a support spring (31) and a mold clamping bolt (32). A receiving groove is provided at the bottom of the upper mold plate (10), and a mounting through hole is provided on the lower mold plate (20). The support spring (31) is located in the receiving groove. One end of the mold clamping bolt (32) passes through the mounting through hole and upwardly passes through the support spring (31) to be threadedly connected with the upper mold plate (10).

7. The perfluoroether O-ring forming mold according to claim 6, characterized in that: It comprises a plurality of mold opening components, which are distributed circumferentially around the O-ring cavity.

8. The perfluoroether O-ring forming mold according to claim 1, characterized in that: Also included is a positioning assembly, which includes a positioning column (41) and a positioning ring (42); The positioning column (41) is installed at the bottom of the upper template (10), and the top of the lower template (20) is provided with a mounting groove, the positioning ring (42) is located in the mounting groove, and the middle of the positioning ring (42) has a positioning groove that matches the positioning column (41); Or, the positioning column (41) is installed on the top of the lower template (20), the bottom of the upper template (10) is provided with a mounting groove, the positioning ring (42) is located in the mounting groove, and the middle of the positioning ring (42) has a positioning groove that matches the positioning column (41); Preferably, the positioning column (41) is mounted on the upper supporting boss, and the positioning ring (42) is mounted on the lower supporting boss; Alternatively, the positioning column (41) is mounted on the lower supporting boss, and the positioning ring (42) is mounted on the upper supporting boss.

9. The perfluoroether O-ring forming mold according to claim 8, characterized in that: The positioning column (41) comprises a mounting portion, a positioning portion and a guide portion which are connected in sequence, the positioning portion matches the shape of the positioning groove, and the outer diameter of the guide portion gradually decreases in a direction away from the positioning portion.

10. A perfluoroether O-ring formed by the perfluoroether O-ring forming mold according to claim 1.

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