A vulcanization mold for a clutch sealing cover

Abstract

The present invention provides a vulcanization mold for a clutch sealing cover, which includes an upper template, a middle template, a lower template and a metal skeleton arranged in sequence from top to bottom; an upper die insert is installed at the bottom end of the upper template; a cavity coaxially arranged with the upper installation groove is penetrated through the middle position of the middle template, and an annular boss surrounding the upper die insert is arranged on one side of the middle template close to the upper template; a lower die core is installed at the top end of the lower template, and a die core is installed at the middle position of the lower die core. In the present invention, the upper template is provided with a structure of multiple small static-sealing upper injection ports, and the lower template is provided with a structure of a single large-size dynamic-sealing lower injection port. The special structure of multiple injection ports is designed to realize the vulcanization of different rubber materials at two places of the product.

Description

Technical Field

[0001] The present invention relates to a vulcanization mold, and more particularly to a vulcanization mold for a clutch sealing cover. Background Art

[0002] With the general trend of continuous industrial development, the types of automotive gearboxes are increasing, and their performance requirements and service life are also getting higher. The sealing system in the gearbox is one of the important factors affecting the service life and performance of the gearbox. Among the gearbox sealing systems, the function of the clutch sealing cover is one of the important factors affecting the clutch and the entire gearbox. As Figure 1 shown in the clutch sealing cover, it is necessary to ensure the dynamic sealing a performance of the engine output shaft and the static sealing b of the product installation and the housing. For one product, there are two different sealing requirements, and the sealing rubber materials are also different. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes a vulcanization mold for a clutch sealing cover.

[0004] A vulcanization mold for a clutch sealing cover proposed by the present invention includes an upper template, a middle template, a lower template, and a metal skeleton arranged in sequence from top to bottom; wherein:

[0005] An upper die insert is installed at the bottom end of the upper template; a cavity coaxial with the upper installation groove is penetrated through the middle position of the middle template, and an annular boss surrounding the upper die insert is provided on one side of the middle template close to the upper template. A lower die core is installed at the top end of the lower template, and a die core is installed at the middle position of the lower die core;

[0006] In the closed die state, a first gap is formed between the top end of the annular boss and the upper template, and a second gap is formed between the inner side of the annular boss and the upper die insert. A plurality of upper injection ports communicating with the first gap are provided on the upper template; the bottom end of the upper die insert extends into the cavity, and a third gap is formed between the bottom end of the upper die insert and the middle template. An upper die groove is provided at the middle position of one end of the upper die insert located in the cavity; a fourth gap is formed between the lower die core and the upper die insert, the die core extends into the upper die groove, and a fifth gap is formed between the die core and the upper die insert. A lower injection port penetrating through the die core and communicating with the fifth gap is provided on the lower die core; the first gap, the second gap, the third gap, the fourth gap, and the fifth gap are sequentially communicated to form an assembly cavity. The metal skeleton is assembled in the assembly cavity, and a closed inner cavity is formed between the inner end of the metal skeleton and the fifth gap. A closed outer cavity is formed between the outer end of the metal skeleton and the first gap. The upper injection port and the lower injection port are respectively communicated with the outer cavity and the inner cavity.

[0007] Preferably, the upper die insert includes an upper die core and an upper die pressing ring; a middle position of the upper template is provided with an upper installation groove in a through manner, and the upper installation groove is a cylindrical stepped groove, and its large-diameter cylindrical groove is located below the small-diameter cylindrical groove; the upper die core is arranged in the large-diameter cylindrical groove and is connected to the upper template by bolts, and the upper die core is provided with an upper assembly table assembled in the small-diameter cylindrical groove of the upper installation groove, and the upper die pressing ring is sleeved on the edge of the upper die core and is connected to the upper template by bolts; in the mold closing state, the annular boss extends into the large-diameter cylindrical groove of the upper installation groove and a second gap is formed between its inner side and the upper die pressing ring.

[0008] Preferably, the upper die insert further includes an exhaust ejector rod, an assembly hole penetrating through the upper die core and communicating with the upper die groove is opened on the upper assembly table, and the exhaust ejector rod is assembled in the assembly hole.

[0009] Preferably, a lower die groove coaxially arranged with the cavity is opened at a middle position of the lower die core, and the die core is assembled in the lower die groove and extends into the upper die groove.

[0010] Preferably, a lower installation groove coaxially arranged with the cavity is penetrated through at a middle position of the lower template, the lower installation groove is a cylindrical stepped groove, and its large-diameter cylindrical groove is located above the small-diameter cylindrical groove, the lower die core is arranged in the large-diameter cylindrical groove of the lower installation groove and is connected to the lower template by bolts, and the lower die core is provided with a lower assembly table assembled in the small-diameter cylindrical groove of the lower installation groove.

[0011] For a vulcanization mold of a clutch sealing cover proposed by the present invention, the upper template is provided with a plurality of small static-sealed upper injection ports, and the lower template is provided with a single large-sized dynamic-sealed lower injection port. The special structure of multiple injection ports is designed to realize the vulcanization of different rubber materials at two places of the product. Therefore, it is also designed according to the characteristics of the rubber material on the mold to ensure that the rubber material can be vulcanized with high quality when injected into the high-temperature mold, so that the process of simultaneously vulcanizing two rubber materials of the whole product to form a product is stable and efficient. Brief Description of the Drawings

[0012] Figure 1 It is a structural schematic diagram of a clutch sealing cover;

[0013] Figure 2 It is a structural schematic diagram of a vulcanization mold of a clutch sealing cover proposed by the present invention;

[0014] Figure 3 It is an exploded view of a vulcanization mold of a clutch sealing cover proposed by the present invention;

[0015] Figure 4 It is a structural schematic diagram of an upper die core in a vulcanization mold of a clutch sealing cover proposed by the present invention;

[0016] Figure 5 It is a structural schematic diagram of a die core in a vulcanization mold of a clutch sealing cover proposed by the present invention;

[0017] Figure 6 This is a schematic structural view of the lower die core in a vulcanization mold for a clutch sealing cover proposed by the present invention. Detailed implementation manners

[0018] Referring to Figures 2-6 , the present invention proposes a vulcanization mold for a clutch sealing cover, which includes an upper template 1, a middle template 2, a lower template 3, and a metal skeleton 4 arranged in sequence from top to bottom; wherein:

[0019] An upper installation groove 11 is formed through the middle position of the upper template 1. An upper die insert is installed in the upper installation groove 11, and an annular gap is formed between the edge of the upper die insert and the groove wall of the upper installation groove 11.

[0020] A cavity 21 coaxial with the upper installation groove 11 is formed through the middle position of the middle template 2. An annular boss 22 extending into the annular gap is arranged on one side of the middle template 2 close to the upper template 1. A first gap 5 and a second gap 6 are respectively formed between the annular boss 22 and the upper template 1 and the upper die insert. A plurality of upper injection ports 12 communicating with the first gap 5 are formed on the upper template 1; the upper die insert extends into the cavity 21, and a third gap 7 is formed between the upper die insert and the middle template 2. And a upper die groove 13 is formed in the middle position of one end of the upper die insert located in the cavity 21.

[0021] A lower installation groove 31 coaxial with the cavity 21 is formed through the middle position of the lower template 3. A lower die core 32 is installed in the lower installation groove 31, and a fourth gap 8 is formed between the lower die core 32 and the upper die insert. A lower die groove 35 coaxial with the cavity 21 is formed in the middle position of the lower die core 32. A die core 33 extending into the upper die groove 13 is installed in the lower die groove 35. A fifth gap 9 is formed between the die core 33 and the upper die insert. A lower injection port 34 penetrating through the die core 33 and communicating with the fifth gap 9 is formed on the lower die core 32.

[0022] In the closed mold state, the first gap 5, the second gap 6, the third gap 7, the fourth gap 8, and the fifth gap 9 are sequentially communicated to form an assembly cavity. The metal skeleton 4 is assembled in the assembly cavity. And a closed inner cavity is formed between the inner end of the metal skeleton 4 and the fifth gap 9, and a closed outer cavity is formed between the outer end of the metal skeleton 4 and the first gap 5. The upper injection port 12 and the lower injection port 34 are respectively communicated with the outer cavity and the inner cavity.

[0023] With the above settings, during mold closing, the metal skeleton 4 is placed in the assembly cavity. A closed inner cavity for vulcanizing and forming the dynamic seal is formed between the inner end of the metal skeleton 4 and the fifth gap 9. A closed outer cavity for vulcanizing and forming the static seal is formed between the outer end of the metal skeleton 4 and the first gap 5. Rubber compound is injected into the outer cavity and the inner cavity through the upper injection port 12 and the lower injection port 34 respectively, realizing the vulcanization of the static seal and the dynamic seal, ensuring that the rubber compound can be vulcanized with high quality in the high-temperature mold, and enabling the two rubber compounds of the whole product to be vulcanized simultaneously to form a product stably and efficiently; the annular gap is used as the exhaust gap during the vulcanization process of the dynamic seal lip of the product inner circle; the setting of the fifth gap 9 ensures the thickness and surface finish of the dynamic seal lip of the product. Its precise gap design and high-standard surface roughness requirements provide a strong guarantee for the high performance of the product.

[0024] In a specific embodiment, the upper mold insert includes an upper mold core 14 and an upper mold pressing ring 15; the upper mounting groove 11 is a cylindrical stepped groove, and its large-diameter cylindrical groove is located below the small-diameter cylindrical groove; the upper mold core 14 is arranged in the large-diameter cylindrical groove and is connected to the upper template 1 by bolts. The upper mold core 14 is provided with an upper assembly table 16 adapted to the small-diameter cylindrical groove. The upper mold pressing ring 15 is sleeved on the edge of the upper mold core 14 and is connected to the upper template 1 by bolts. A second gap 6 is formed between the upper mold pressing ring 15 and the annular boss 22. By setting the upper mold pressing ring 15, when the mold is opened, the upper mold pressing ring 15 promptly ejects the product, preventing the product from sticking to the upper template 1 and causing the product to be unqualified.

[0025] In a specific embodiment, the upper mold insert further includes an exhaust ejector rod 17. The upper assembly table 16 is provided with an assembly hole penetrating the upper mold core 14 and communicating with the upper mold groove 13. The exhaust ejector rod 17 is assembled in the assembly hole. The exhaust ejector rod provided in the present invention is used for exhausting the mold core, ensuring the high efficiency and high quality of the product vulcanization. The upper mold groove 13 is the first exhaust during the vulcanization process of the dynamic seal lip of the product. To ensure the density and wear resistance of the dynamic seal lip of the product inner circle and the design requirements of the return pattern, the gap formed by the exhaust ejector rod 17 and the upper mold groove 13 ensures smooth exhaust but no leakage of the rubber compound during the vulcanization process, thereby ensuring the quality of the product dynamic seal.

[0026] In a specific embodiment, the lower mounting groove 31 is a cylindrical stepped groove, and its large-diameter cylindrical groove is located above the small-diameter cylindrical groove. The lower mold core 32 is arranged in the large-diameter cylindrical groove and is connected to the lower template 3 by bolts. The lower mold core 32 is provided with a lower assembly table 36 adapted to the small-diameter cylindrical groove.

[0027] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A vulcanization mold for a clutch sealing cover, characterized in that, it includes an upper template (1), a middle template (2), a lower template (3) and a metal skeleton (4) arranged in sequence from top to bottom; among them: An upper die insert is installed at the bottom end of the upper template (1), and an upper installation groove (11) is penetrated and opened at the middle position of the upper template (1); a cavity (21) coaxial with the upper installation groove (11) is penetrated and opened at the middle position of the middle template (2), and a ring-shaped boss (22) surrounding the upper die insert is arranged on the side of the middle template (2) close to the upper template (1). A lower die core (32) is installed at the top end of the lower template (3), and a die core (33) is installed at the middle position of the lower die core (32); In the closed die state, the top end of the ring-shaped boss (22) forms a first gap (5) with the upper template (1), and a second gap (6) is formed between the inner side of the ring-shaped boss (22) and the upper die insert. A plurality of upper injection ports (12) communicating with the first gap (5) are opened on the upper template (1); the bottom end of the upper die insert extends into the cavity (21), and a third gap (7) is formed between the bottom end of the upper die insert and the middle template (2). And an upper die groove (13) is opened at the middle position of the end of the upper die insert located in the cavity (21); a fourth gap (8) is formed between the lower die core (32) and the upper die insert, the die core (33) extends into the upper die groove (13), and a fifth gap (9) is formed between the die core (33) and the upper die insert. A lower injection port (34) penetrating the die core (33) and communicating with the fifth gap (9) is opened on the lower die core (32); the first gap (5), the second gap (6), the third gap (7), the fourth gap (8), and the fifth gap (9) are sequentially communicated to form an assembly cavity. The metal skeleton (4) is assembled in the assembly cavity, and a closed inner cavity is formed between the inner end of the metal skeleton (4) and the fifth gap (9). A closed outer cavity is formed between the outer end of the metal skeleton (4) and the first gap (5). The upper injection port (12) and the lower injection port (34) are respectively communicated with the outer cavity and the inner cavity.

2. The vulcanization mold for a clutch sealing cover according to claim 1, characterized in that, The upper die insert includes an upper die core (14) and an upper die pressing ring (15); an upper installation groove (11) is penetrated and opened at the middle position of the upper template (1). The upper installation groove (11) is a cylindrical step groove, and its large-diameter cylindrical groove is located below the small-diameter cylindrical groove; the upper die core (14) is arranged in the large-diameter cylindrical groove and is connected to the upper template (1) by bolts. The upper die core (14) is provided with an upper assembly table (16) assembled in the small-diameter cylindrical groove of the upper installation groove (11). The upper die pressing ring (15) is sleeved on the edge of the upper die core (14) and is connected to the upper template (1) by bolts; in the closed die state, the ring-shaped boss (22) extends into the large-diameter cylindrical groove of the upper installation groove, and a second gap (6) is formed between its inner side and the upper die pressing ring (15).

3. The vulcanization mold for a clutch sealing cover according to claim 2, characterized in that, The upper die insert further includes an exhaust ejector rod (17). The upper assembly table (16) is provided with an assembly hole that penetrates through the upper die core (14) and communicates with the upper die groove (13), and the exhaust ejector rod (17) is assembled in the assembly hole.

4. The vulcanization mold for the clutch sealing cover according to any one of claims 1-3, characterized in that, a lower die groove (35) coaxial with the cavity (21) is provided at the middle position of the lower die core (32), and the die core is assembled in the lower die groove (35) and extends into the upper die groove (13).

5. The vulcanization mold for the clutch sealing cover according to any one of claims 1-3, characterized in that, a lower installation groove (31) coaxial with the cavity (21) is provided through the middle position of the lower template (3). The lower installation groove (31) is a cylindrical stepped groove, and its large-diameter cylindrical groove is located above the small-diameter cylindrical groove. The lower die core (32) is arranged in the large-diameter cylindrical groove of the lower installation groove (31) and is connected to the lower template (3) by bolts. The lower die core (32) is provided with a lower assembly table (36) assembled in the small-diameter cylindrical groove of the lower installation groove (31).

Images