Graphite self-sealing ring pressing die
Through the threaded connection of the limit ring to the mounting barrel and the air intake ring groove design, the problems of inaccurate thickness control of graphite self-sealing ring and the adhesion of the limit ring are solved, and the applicability and operational convenience are achieved.
Patent Information
- Application Number
- CN202422425761.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-09
AI Technical Summary
Traditional graphite self-sealing ring pressing molds cannot accurately control the thickness, and the limit ring and the sleeve ring are prone to stick, resulting in inconvenient production and high cost.
The limit ring is threadedly connected to the mounting cylinder. By adjusting the limit ring position, the downward depth of the pressure ring is controlled. Combined with the air intake ring groove and the ventilation groove design, the risk of adhesion between the limit ring and the sleeve ring is reduced and the risk of separation is convenient.
The compression of graphite self-sealing rings with different thicknesses is achieved, which reduces production costs and improves operational convenience, and reduces the risk of adhesion between the limit ring and the collar.
Smart Images
Figure CN223252434U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of graphite processing equipment, in particular to a graphite self-sealing ring pressing die. Background Art
[0002] Graphite self-sealing rings are molded from graphite material. They feature precise dimensions and a variable density. They can withstand intense temperature and pressure fluctuations, making them ideal fillers for valves and various static seals. The pressing process for graphite self-sealing rings requires the use of a corresponding pressing die. Traditional pressing dies generally consist of a base, a collar, a pressure ring, and an inner core. When the mold is closed, the outer diameter of the graphite self-sealing ring is equal to the inner diameter of the collar, the inner diameter of the graphite self-sealing ring is equal to the outer diameter of the inner core, and the thickness of the graphite self-sealing ring is equal to the distance between the bottom of the pressure ring and the top of the base.
[0003] Since the distance between the pressure ring and the base cannot be accurately controlled, the accuracy of the thickness of the graphite self-sealing ring is affected. When making improvements, a limit ring that can rest on the top of the sleeve ring is added to the pressure ring. When the limit ring rests on the sleeve ring, the pressure ring stops descending, making the distance between the pressure ring and the base controllable. However, the connection between the limit ring and the pressure ring is generally a fixed connection, so that a single pressure ring is only suitable for the pressing production of graphite self-sealing rings of a specific thickness. When producing graphite self-sealing rings of different thicknesses, other pressure rings need to be replaced, which increases production costs. In addition, when the graphite self-sealing ring is pressed, there is a risk of adhesion between the bottom of the limit ring and the top of the sleeve ring due to close contact, which hinders the separation operation between the limit ring and the sleeve ring when removing the product, causing production inconvenience. Utility Model Content
[0004] The utility model aims to provide a graphite self-sealing ring pressing die, which has the advantages of being suitable for pressing graphite self-sealing rings with different pressing thicknesses and convenient for separating the pressing ring and the sleeve ring.
[0005] The technical solution of the utility model is as follows:
[0006] A graphite self-sealing ring pressing die comprises a base, a sleeve, a pressure ring and an inner core, wherein the base comprises a bottom plate and a top column, the top column is arranged at the center of the top of the bottom plate and the two are coaxial, the sleeve is sleeved on the top column and the bottom of the sleeve is against the top of the bottom plate, the pressure ring is inserted into the sleeve and a gap is left between the bottom of the pressure ring and the top of the top column, the inner core is inserted into the pressure ring and the bottom of the inner core is against the center of the top of the top column, the pressing space of the graphite self-sealing ring is surrounded by the bottom of the pressure ring, the top of the top column, the outer wall of the inner core and the inner wall of the sleeve, and the top of the pressure ring is provided with a coaxial and The mounting tube of the body is provided with an external thread on the outer wall of the mounting tube, and the mounting tube is threadedly connected to a limit ring and an anti-slip ring, the bottom of the limit ring abuts against the top of the ring, and the top of the limit ring abuts against the bottom of the anti-slip ring, and the bottom of the limit ring is provided with a plurality of concentric air intake ring grooves, and the spacing between adjacent air intake ring grooves is considerable, and the adjacent air intake ring grooves are connected to each other through connecting grooves, and a plurality of ventilation grooves are evenly provided along the circumference of the outer edge of the top of the ring, and the air intake ring groove located on the outermost side is connected to the outside air through the ventilation groove.
[0007] Preferably, the cross-sectional shape of the ventilation groove is a triangle that is wide outside and narrow inside, and the number of the ventilation grooves is four.
[0008] Preferably, the number of the air intake ring grooves is three.
[0009] Preferably, there is a clearance fit between the inner wall of the collar and the outer wall of the top column, between the inner wall of the collar and the outer wall of the pressure ring, and between the inner wall of the pressure ring and the outer wall of the inner core.
[0010] Preferably, a ventilation hole is provided on the central axis of the base which passes through the base from top to bottom.
[0011] The utility model has the following beneficial technical effects:
[0012] 1. The limiting ring is used to limit the pressing depth of the pressure ring in the sleeve, thereby controlling the pressing thickness of the graphite self-sealing ring. The limiting ring is threadedly connected to the mounting barrel. By changing the position of the limiting ring on the mounting barrel, the distance between the limiting ring and the pressure ring is changed, thereby adapting to the needs of different pressing thicknesses of graphite self-sealing rings and improving versatility. The movable ring is against the top of the limiting ring, reducing the risk of the limiting ring moving up due to the pressure when pressing the graphite self-sealing ring.
[0013] 2. By using the air intake ring groove and the ventilation groove together, a certain amount of air is allowed to exist between the bottom of the limit ring and the top of the sleeve ring, reducing the risk of adhesion between the limit ring and the sleeve ring due to close contact. In addition, the ventilation groove provides a force point for convenient tool insertion. When adhesion occurs between the limit ring and the sleeve ring, the staff can insert the tool into the ventilation groove and lift the limit ring to separate the limit ring and the sleeve ring smoothly, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The technical solution of the utility model will be further described below in conjunction with the accompanying drawings.
[0015] Attachment Figure 1 This is a schematic diagram of the base, sleeve ring, pressure ring and inner core of the utility model when they are separated.
[0016] Attachment Figure 2 This is a cross-sectional view from the main perspective of the utility model when the mold is closed.
[0017] Attachment Figure 3 This is a bottom view of the limit ring.
[0018] Attachment Figure 4 A top view of the collar.
[0019] In the figure: 1-base, 2-ring, 3-pressure ring, 4-inner core, 5-bottom plate, 6-top column, 7-mounting cylinder, 8-limiting ring, 9-anti-slip ring, 10-intake ring groove, 11-connecting groove, 12-ventilation groove, 13-ventilation hole. DETAILED DESCRIPTION
[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0021] Example:
[0022] like Figures 1 to 4 As shown, this embodiment provides a graphite self-sealing ring pressing die, including a base 1, a sleeve ring 2, a pressure ring 3 and an inner core 4. The base 1 includes a bottom plate 5 and a top column 6. The top column 6 is located at the center of the top of the bottom plate 5 and the two are coaxial. The sleeve 2 is sleeved on the top column 6 and the bottom of the sleeve 2 is against the top of the bottom plate 5. The pressure ring 3 is inserted into the sleeve 2 and a gap is left between the bottom of the pressure ring 3 and the top of the top column 6. The inner core 4 is inserted into the pressure ring 3 and the bottom of the inner core 4 is against the center of the top of the top column 6. The pressing space for the graphite self-sealing ring is surrounded by the bottom of the pressure ring 3, the top of the top column 6, the outer wall of the inner core 4 and the inner wall of the sleeve 2. The pressure ring 3 A coaxial and integrated mounting tube 7 is provided at the top, and an external thread is provided on the outer wall of the mounting tube 7. A limit ring 8 and an anti-slip ring 9 are threadedly connected to the mounting tube 7. The bottom of the limit ring 8 abuts against the top of the collar 2, and the top of the limit ring 8 abuts against the bottom of the anti-slip ring 9. A plurality of concentric air intake ring grooves 10 are provided at the bottom of the limit ring 8. The spacing between adjacent air intake ring grooves 10 is considerable, and adjacent air intake ring grooves 10 are connected to each other through connecting grooves 11. A plurality of ventilation grooves 12 are evenly provided along the circumference of the outer edge of the top of the collar 2, and the air intake ring groove 10 located on the outermost side is connected to the outside air through the ventilation groove 12.
[0023] The limit ring 8 is used to limit the pressing depth of the pressure ring 3 in the sleeve 2, thereby controlling the pressing thickness of the graphite self-sealing ring. The limit ring 8 is threadedly connected to the installation tube 7. By changing the position of the limit ring 8 on the installation tube 7, the distance between the limit ring 8 and the pressure ring 3 can be changed, thereby adapting to the pressing thickness of different graphite self-sealing rings and improving versatility. The movable ring is against the top of the limit ring 8, reducing the risk of the limit ring 8 moving up due to the pressure when pressing the graphite self-sealing ring. By using the air intake ring groove 10 and the ventilation groove 12 in combination, a certain amount of air is allowed to exist between the bottom of the limit ring 8 and the top of the sleeve 2, reducing the risk of the limit ring 8 and the sleeve 2 sticking due to close contact under force. In addition, the ventilation groove 12 provides a force point for convenient tool insertion. When the limit ring 8 and the sleeve 2 stick together, the staff can insert the tool into the ventilation groove 12 and then lift the limit ring 8, so that the limit ring 8 and the sleeve 2 can be separated smoothly, which is convenient to operate.
[0024] Furthermore, the cross-sectional shape of the ventilation grooves 12 is a triangle that is wide on the outside and narrow on the inside, and there are four ventilation grooves 12. The ventilation grooves 12 are wide on the outside and narrow on the inside, which facilitates the insertion of tools and the lifting of the retaining ring 8. The ventilation grooves 12 are distributed in four directions to prevent the spacing between adjacent ventilation grooves 12 from being too small, which would affect the strength of the outer edge of the top of the collar 2.
[0025] Furthermore, there are three intake ring grooves 10. Air flows in the passage formed by the intake ring groove 10 and the connecting groove 11, reducing the risk of adhesion between the limit ring 8 and the sleeve ring 2 due to close contact.
[0026] Furthermore, there is clearance fit between the inner wall of the collar 2 and the outer wall of the top column 6, between the inner wall of the collar 2 and the outer wall of the pressure ring 3, and between the inner wall of the pressure ring 3 and the outer wall of the inner core 4, which facilitates assembly and disassembly operations between components.
[0027] Furthermore, a vent hole 13 is provided on the central axis of the base 1. The vent hole 13 is used to help maintain the air pressure balance between the pressing space and the outside air, thereby improving the pressing effect.
[0028] The working principle and use process of this utility model:
[0029] Select the raw materials according to the specifications of the graphite self-sealing ring and adjust the position of the limit ring 8 on the mounting tube 7, wind the raw materials on the inner core 4, and then install the sleeve 2 and the inner core 4 on the base 1 respectively, and then install the pressure ring 3 into the sleeve 2, and the pressure ring 3 is put on the inner core 4. At this time, the raw materials are between the top of the base 1 and the bottom of the pressure ring 3. Put the mold on the pressure device and press it until the bottom of the limit ring 8 is against the top of the sleeve 2, press the mold back, withdraw the pressure ring 3, and take away the graphite self-sealing ring.
[0030] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.
Claims
1. A graphite self-sealing ring pressing die, comprising a base, a sleeve, a pressure ring and an inner core, wherein the base comprises a bottom plate and a top post, the top post being located at the center of the top of the bottom plate and the two being coaxial, the sleeve being sleeved on the top post and the bottom of the sleeve abutting against the top of the bottom plate, the pressure ring being inserted into the sleeve and a gap being left between the bottom of the pressure ring and the top of the top post, the inner core being inserted into the pressure ring and the bottom of the inner core abutting against the center of the top of the top post, the pressing space for the graphite self-sealing ring being enclosed by the bottom of the pressure ring, the top of the top post, the outer wall of the inner core and the inner wall of the sleeve, characterized in that: A coaxial and integral mounting tube is provided on the top of the pressure ring, and an external thread is provided on the outer wall of the mounting tube. A limit ring and an anti-slip ring are threadedly connected to the mounting tube, and the bottom of the limit ring abuts against the top of the collar, and the top of the limit ring abuts against the bottom of the anti-slip ring. A plurality of concentric air intake ring grooves are provided at the bottom of the limit ring, and the spacing between adjacent air intake ring grooves is considerable. Adjacent air intake ring grooves are connected to each other through connecting grooves, and a plurality of ventilation grooves are evenly provided along the circumference of the outer edge of the top of the collar, and the air intake ring groove located on the outermost side is connected to the outside air via the ventilation groove.
2. The graphite self-sealing ring pressing die according to claim 1, characterized in that: The cross-sectional shape of the ventilation groove is a triangle that is wide outside and narrow inside, and the number of the ventilation grooves is four.
3. The graphite self-sealing ring pressing die according to claim 1, characterized in that: The number of the intake ring grooves is three.
4. The graphite self-sealing ring pressing die according to claim 1, characterized in that: There is clearance fit between the inner wall of the collar and the outer wall of the top column, between the inner wall of the collar and the outer wall of the pressure ring, and between the inner wall of the pressure ring and the outer wall of the inner core.
5. The graphite self-sealing ring pressing die according to claim 1, characterized in that: A vent hole is provided on the central axis of the base which passes through the base from top to bottom.