Vulcanization tool for simulating oil seal lip structure

Abstract

The utility model relates to the technical field of friction performance testing of sealing elements, in particular to a vulcanization tool for simulating an oil seal lip structure, which comprises an upper die and a lower die, and further comprises a glue storage tank arranged at a glue overflow position between the upper die and the lower die, the upper die is provided with an annular cavity, the cross section of the cavity is in a concave shape, and the lower die is provided with a sealing ring. The lower die is provided with a boss capable of being embedded into the cavity, the top end face of the boss is in contact with the bottom end face of the cavity, and a lip groove is formed in the contact position of the top end face. According to the device, the lip shape of the oil seal can be vulcanized in advance to form a section to serve as a test piece, and the test piece is used for testing the friction performance of the lip of the oil seal; compared with manufacturing of a complete oil seal, the testing period is greatly shortened, meanwhile, if lip parameters need to be adjusted, only the lower die needs to be adjusted, and the manufacturing cost of the die is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing element friction performance test technical field especially, relate to a kind of vulcanization tool of simulation oil seal lip structure. BACKGROUND

[0002] The friction performance test of sealing element at present stage relies on complete sealing element to test, usually need to pass through sealing element piece mould design, mould processing, sealing element vulcanization forming, secondary vulcanization, cutting processing and spring assembly etc. Many processes in turn, time-consuming is longer, and sealing element is mainly tested to sealing lip when friction performance test, and present stage test needs to be carried out after sealing element processing, leading to test cycle lengthening, if test does not meet the requirement, local improvement adjustment cannot be realized, and test cost is higher. INVENTION CONTENTS

[0003] Technical purpose: in order to overcome the deficiencies in the prior art, the utility model provides a kind of vulcanization tool of simulation oil seal lip structure.

[0004] Technical scheme: to achieve the above-mentioned purpose, the utility model discloses a kind of vulcanization tool of simulation oil seal lip structure, including upper die and lower die, still including the glue storage groove that is equipped at the overflow of glue between the upper die and lower die, the upper die is equipped with annular cavity, the cavity cross section is "concave" type, the lower die is equipped with the boss that can be embedded in the cavity, the top end surface of the boss is in contact with the bottom end surface of the cavity, the top end surface is equipped with lip slot at contact place.

[0005] Preferably, the upper die and lower die are combined to form an annular surrounding cavity inside, and a positioning ring is installed in the surrounding cavity with interference, and the upper die and lower die form a clamping groove on the outer wall after being combined.

[0006] Preferably, the top end surface is also provided with a cutting groove near the edge side of the lip slot.

[0007] Preferably, the lip slot is linear, and the number of cutting grooves is two, which are arranged on both sides of the lip slot.

[0008] Preferably, the cutting groove cross section is V-shaped.

[0009] Preferably, the positioning ring is provided with an annular glue storage groove near the upper die side, and the glue storage groove cross section is square.

[0010] Preferably, the upper die and lower die are each provided with a group of grooves for fixing the clamps on the outer wall.

[0011] The utility model has the beneficial effects that:

[0012] Once a new oil seal design is completed, this device can pre-cured a section of the oil seal lip shape as a test piece. This test piece is then used to test the frictional performance of the oil seal lip, obtaining its frictional force and coefficient of friction relative to the test surface. This significantly shortens the testing cycle compared to manufacturing a complete oil seal. Furthermore, if adjustments to the lip parameters are needed, only the mold needs to be adjusted, saving on mold manufacturing costs. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the upper mold of this utility model;

[0015] Figure 3 This is a sectional view of the lower mold of this utility model;

[0016] Figure 4 This is a top view of the lower mold of this utility model;

[0017] Figure 5 Appendix to this utility model Figure 3 A magnified view of a portion of region A in the middle.

[0018] In the diagram, 1 is the upper mold; 2 is the lip groove; 3 is the glue reservoir; 4 is the cut groove; 5 is the positioning ring; 6 is the lower mold; 7 is the groove; 8 is the boss; 9 is the top surface; 10 is the cavity; 11 is the bottom surface; and 12 is the slot. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1 To be continued Figure 5 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0020] A vulcanizing apparatus that simulates the structure of an oil seal lip, such as Figure 1 — Figure 5 As shown, the device includes an upper mold 1 and a lower mold 6, and also includes a glue storage tank 3 located between the upper mold 1 and the lower mold 6 at the glue overflow point. The upper mold 1 has an annular cavity 10 with a concave cross-section. The lower mold 6 has a boss 8 that can be embedded in the cavity 10. The top surface 9 of the boss 8 contacts the bottom surface 11 of the cavity 10. The top surface 9 has a lip groove 2 at the contact point with the bottom surface 11. The specific shape of the lip groove 2 can be determined according to the lip shape of the oil seal to be tested. In this embodiment, the lip groove 2 is straight, meaning that only a section of the lip of the oil seal to be tested needs to be obtained during actual vulcanization. To facilitate cutting off the excess material at the edge of the vulcanized specimen, the top surface 9 also has a cutting groove 4 near the edge of the lip groove 2. The cutting groove 4 has a V-shaped cross-section, and there are two cutting grooves 4 arranged on both sides of the lip groove 2.

[0021] In order to prevent the position deviation of the upper die 1 and the lower die 6 in the vulcanization process, resulting in the poor vulcanization test piece, in the embodiment, the upper die 1 and the lower die 6 are combined to form an annular surrounding cavity, the positioning ring 5 is installed in the surrounding cavity in an interference fit, and the relative position of the upper die 1 and the lower die 6 is locked through the positioning ring 5, and in order to facilitate the mold opening, the clamping groove 12 is formed in the outer wall of the upper die 1 and the lower die 6 in the circumferential direction after the combination.

[0022] Further, in order to facilitate the processing of the glue storage groove 3, in the embodiment, the glue storage groove 3 is arranged on the positioning ring 5, and specifically, the positioning ring 5 is provided with the annular glue storage groove 3 close to the upper die 1, and the cross section of the glue storage groove 3 is square.

[0023] The working principle of the device is that the solidified rubber raw material is placed in the lip slot 2, the positioning ring 5 and the upper die 1 are assembled in sequence, in the vulcanization process, the rubber raw material is liquefied and fills the lip slot 2, and the excess rubber raw material enters the glue storage groove 3, after the vulcanization is completed, the flash is cut off at the cutting groove 4 position, and the test piece is obtained, the obtained test piece is used for the friction performance test, the test period can be greatly shortened.

[0024] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A vulcanization tool for simulating the lip structure of an oil seal comprising an upper mold (1) and a lower mold (6), characterized in that: Also included between the upper mold (1) and the lower mold (6) is a glue storage groove (3) at the glue overflow position, the upper mold (1) is provided with an annular cavity (10), the cross section of the cavity (10) is concave, the lower mold (6) is provided with a boss (8) which can be embedded in the cavity (10), the top end surface (9) of the boss (8) is in contact with the bottom end surface (11) of the cavity (10), and the top end surface (9) is provided with a lip groove (2) at the contact position.

2. The molding apparatus according to claim 1, wherein: The upper mold (1) and the lower mold (6) are combined to form an annular surrounding cavity inside, and a positioning ring (5) is installed in the surrounding cavity with interference, and the upper mold (1) and the lower mold (6) form a clamping groove (12) on the outer wall after being combined.

3. The molding apparatus of claim 1, wherein: The top end surface (9) is also provided with a cutting groove (4) near the edge side of the lip groove (2).

4. The molding apparatus of claim 3, wherein: The lip groove (2) is linear, and the number of the cutting groove (4) is two which are arranged on both sides of the lip groove (2).

5. The molding apparatus of claim 3, wherein: The cross section of the cutting groove (4) is V-shaped.

6. The molding apparatus of claim 2, wherein: The positioning ring (5) is provided with an annular glue storage groove (3) near the upper mold (1) side, and the cross section of the glue storage groove (3) is square.

7. The molding apparatus of claim 1, wherein: The upper mold (1) and the lower mold (6) are each provided with a group of grooves (7) for fixing the calipers on the outer wall.

Images