Forming die for sealing ring production
By adopting a combination design of constant temperature plate and heating plate in the seal ring forming mold, the problem of waste of heat energy and raw materials during the molding process of the existing mold is solved, and a more efficient molding process and better seal ring quality is achieved.
Patent Information
- Application Number
- CN202420850331.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-04-23
AI Technical Summary
During the heating molding process, existing seal ring molds have problems such as waste of heat energy, waste of raw materials, large labor intensity and slow molding rate.
A molding mold design including a constant temperature plate, a heating plate and a mold is adopted. The temperature of the hot melt rubber is controlled through the constant temperature plate, and the heating plate and the heat insulation are optimized to ensure that the hot melt rubber maintains a constant temperature during the molding process.
It effectively reduces the waste of heat energy and raw materials, improves the forming rate and working efficiency, and ensures the forming quality of the seal ring.
Smart Images
Figure CN222886185U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rubber injection, in particular to a forming die for the production of sealing rings. Background Art
[0002] A sealing ring forming die is a forming die that provides the forming of sealing rings. The selection of the sealing ring material is of great significance to its sealing performance and service life. When traditionally manufacturing sealing rings, circular upper and lower dies are used, with grooves inside, and the rubber is vulcanized and formed. Ethylene propylene diene monomer (EPDM) sealing rings are suitable for fire-fighting pipelines, and nitrile butadiene rubber (NBR) is suitable for use in media such as petroleum-based hydraulic oil, glycol-based hydraulic oil, diester-based lubricating oil, gasoline, water, silicone grease, and silicone oil. It is the rubber sealing part with the widest use and the lowest cost. Generally, the operating temperature range is -40 to 120 °C. Rubber sealing rings have excellent corrosion resistance, tear resistance, and compression set resistance characteristics, and are relatively good in ozone resistance, sunlight resistance, and weather resistance.
[0003] The prior art is to manually place raw materials into the die, then heat and form, and then open the die to take out the product, and cycle the placement and taking out in sequence. The cyclic placement and taking out will cause waste of the heat energy of the heating device. There will be a problem of insufficient feeding when manually placing raw materials. Re-placing will cause waste of heat energy, and placing too much material will cause waste of raw materials. At the same time, there are problems of high labor intensity and slow forming rate. Now, it is improved to inject hot-melt rubber into the die for forming, with less waste of raw materials, less heat energy loss, fast forming rate, improved work efficiency, and reduced energy waste. Summary of the Utility Model
[0004] The problem solved by the utility model is to provide a forming die for the production of sealing rings, which can ensure that the hot-melt rubber is fed into the die at a uniform speed while controlling the temperature of the hot-melt rubber, so as to ensure the forming quality of the sealing ring.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A forming die for the production of sealing rings, including a die, characterized in that a constant temperature plate is correspondingly provided at the feeding end of the die, a heating plate is provided between the constant temperature plate and the die, the heating plate is connected to the constant temperature plate through a heat insulation plate, a glue injection hole is provided on the upper end surface of the constant temperature plate, an installation hole is provided on the lower end surface of the constant temperature plate, the upper end of the installation hole is communicated with the lower end of the glue injection hole through a glue injection channel, an oil injection hole and an oil outlet hole are provided on the side surface of the constant temperature plate, an oil channel communicating the oil injection hole and the oil outlet hole is provided inside the constant temperature plate, the oil channel communicates to the side wall of the installation hole, a glue injection nozzle that can pass through the heating plate and cooperate with the feeding end of the die is provided in the installation hole, the upper end of the glue injection nozzle is cooperatively installed with the upper end of the installation hole, the lower end of the glue injection nozzle is cooperatively installed with the feeding end of the die, a heat preservation cavity is provided in the glue injection nozzle, and the oil inlet end and the oil outlet end of the heat preservation cavity are respectively communicated with the oil channel.
[0007] As an improved technical solution, four of the installation holes are provided at the lower end of the constant temperature plate, the glue injection channel communicates the upper end of the installation hole and the lower end of the glue injection hole and is arranged in a cross shape, and the axis of the glue injection channel coincides with the diagonal line of the plane of the constant temperature plate, the outer end of the glue injection channel communicates with the outside of the constant temperature plate, and a plug column is plugged at the outer end of the glue injection channel.
[0008] As an improved technical solution, the side walls between the installation holes are communicated through an oil inlet branch pipeline, a plug column is plugged at the outer end of the oil inlet branch pipeline, an oil inlet main pipeline is communicated with the oil inlet branch pipeline, and the oil inlet main pipeline is communicated with the oil injection hole.
[0009] As an improved technical solution, an oil outlet branch pipeline is communicated between the side walls between the installation holes above the oil inlet branch pipeline, a plug column is plugged at the outer end of the oil outlet branch pipeline, an oil outlet main pipeline is communicated with the oil outlet branch pipeline, and the oil outlet main pipeline is communicated with the oil outlet hole.
[0010] As an improved technical solution, one end surface of the heating plate is fixedly connected to the constant temperature plate through a heat insulation plate, the other end surface of the heating plate is fixedly connected to the upper end of the die, several heating rods are penetrated on the side surface of the heating plate, the plane where the axis of the heating rod is located is perpendicular to the plane where the center line of the end surface of the heating plate is located, and a through hole for passing through the glue injection nozzle is provided on the heating plate.
[0011] As an improved technical solution, the mounting hole includes a connecting section provided inside the thermostatic plate. The connecting section is provided at the discharging end of the over-injection glue channel. The upper end of the injection nozzle is inserted at the connecting section. The outer part of the connecting section is provided with a plurality of outwardly expanding positioning sections. A sealing gasket is provided at the edge of the positioning section. An oil inlet hole communicating with the oil outlet branch pipe is opened on the positioning section close to the connecting section. An oil drain hole communicating with the oil inlet branch pipe is opened on the positioning section close to the positioning section. A plurality of fixing holes for fixing the injection nozzle are uniformly opened on the end surface of the positioning section close to the lower end surface of the thermostatic plate.
[0012] As an improved technical solution, the injection nozzle includes a nozzle body. A fixing plate fixed to the end surface of the positioning section is provided at the upper end of the nozzle body. Positioning through holes corresponding to the fixing holes are provided on the fixing plate. A plurality of fixing sections with gradually decreasing outer diameters are provided on the upper part of the fixing plate. The top end of the fixing section is fitted and installed with the connecting section. A rubber channel for conveying hot-melt rubber is opened at the centers of the nozzle body, the fixing plate and the fixing section. A heat preservation cavity is arranged around the outside of the rubber channel. An oil inlet communicating with the heat preservation cavity and corresponding to the oil inlet hole is opened on the fixing section. An oil outlet communicating with the heat preservation cavity and corresponding to the oil outlet hole is also opened on the fixing section. A heat preservation sleeve is sleeved outside the nozzle body. The lower end of the nozzle body is flush with the lower end of the heat preservation sleeve. The lower end of the nozzle body is fitted and installed with the mold.
[0013] As an improved technical solution, the mold includes an upper mold and a lower mold that are buckled up and down. A feeding hole corresponding to the injection nozzle is opened in the upper part of the upper mold. A feeding through hole corresponding to the rubber channel is provided at the end of the feeding hole. An upper mold cavity surrounding the feeding through hole is provided in the lower part of the upper mold. The upper mold cavities are communicated through an upper mold groove, and the feeding through hole is arranged at the intersection center of the upper mold groove. A lower mold cavity for placing a core is formed with the upper mold cavity on the upper part of the lower mold. The lower mold cavities are communicated through a lower mold groove. A channel for passing hot-melt rubber is formed between the upper mold groove and the lower mold groove.
[0014] As an improved technical solution, auxiliary positioning holes are symmetrically opened on the thermostatic plate on both sides of the injection hole.
[0015] The beneficial effects of the present utility model are as follows: The glue injection device injects hot-melt rubber into the constant temperature plate. Part of the heat of the hot-melt rubber will be transferred to the constant temperature plate. The hot-melt rubber is sent to the glue injection nozzle through the glue injection channel. The heat-conducting oil with a certain temperature will be sent into the heat preservation cavity through the oil channel. The heat-conducting oil will exchange heat with the hot-melt rubber in the glue injection nozzle in the heat preservation cavity, so as to ensure that the hot-melt rubber maintains a constant temperature. The heat-conducting oil circulates through the oil channel, so as to ensure the heat of the heat-conducting oil. The constant-temperature heat-conducting oil can ensure that the temperature of the hot-melt rubber remains constant. The setting of the heating plate can heat the mold, and the temperature rise of the mold can cause the hot-melt rubber sent by the glue injection nozzle to vulcanize and form. The heat insulation plate can isolate the heat of the heating plate from being transferred to the constant temperature plate. Through the heat preservation cavity, the heat of the heating plate can be isolated from being transferred to the glue injection nozzle, avoiding the vulcanization and molding of the rubber in the glue injection nozzle caused by the heating of the heating plate, resulting in the blockage of the glue injection nozzle, thereby ensuring the molding quality of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic structural diagram of the present utility model;
[0017] Figure 2 is a schematic structural diagram of another angle of the present utility model;
[0018] Figure 3 is Figure 1 a schematic structural diagram in the top view direction of
[0019] Figure 4 is Figure 3 a sectional structural diagram in the A-A direction of
[0020] Figure 5 is Figure 4 an enlarged structural diagram of part A of
[0021] Figure 6 is Figure 1 a schematic structural diagram in the front view direction of
[0022] Figure 7 is Figure 6 a sectional structural diagram in the B-B direction of
[0023] Figure 8 is Figure 6 a sectional structural diagram in the C-C direction of
[0024] Figure 9 is Figure 6 a sectional structural diagram in the D-D direction of
[0025] Figure 10 is Figure 1 a schematic structural diagram in the bottom view direction of
[0026] Figure 11 isFigure 1 Schematic structural diagram of the glue injection nozzle;
[0027] Figure 12 is Figure 11 Schematic structural diagram in the top-down view direction;
[0028] Figure 13 is Figure 12 Schematic cross-sectional structure diagram in the E-E direction;
[0029] Figure 14 is Figure 1 Schematic structural diagram of the mold;
[0030] Figure 15 is Figure 14 Schematic structural diagram of the upper mold;
[0031] Figure 16 is Figure 14 Schematic structural diagram of the lower mold;
[0032] Legend description: 11. Constant temperature plate, 12. Glue injection hole, 13. Auxiliary positioning hole, 15. Oil injection hole, 16. Oil outlet hole, 17. Glue injection channel, 18. Blocking column, 110. Oil outlet hole, 111. Oil inlet branch pipe, 112. Oil outlet branch pipe, 2. Heating plate, 21. Heating rod, 22. Heat insulation plate, 3. Mold, 31. Upper mold, 32. Lower mold, 33. Feeding hole, 34. Feeding through hole, 35. Upper mold cavity, 36. Upper mold groove, 37. Lower mold cavity, 38. Lower mold groove, 41. Nozzle body, 42. Fixed disk, 43. Positioning through hole, 44. Fixed section, 45. Rubber channel, 46. Heat preservation cavity, 47. Oil inlet, 48. Oil outlet, 49. Heat preservation sleeve. Detailed implementation manners
[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0034] Referring to Figure 1-16 as shown, a molding mold 3 for the production of sealing rings includes a constant temperature plate 11, a heating plate 2, and a mold 3 arranged in sequence from top to bottom.
[0035] The upper end surface of the temperature control plate 11 is provided with a glue injection hole 12, and a glue injection device can be connected to the glue injection hole 12. The glue injection device can send hot-melt rubber into the temperature control plate 11. Auxiliary positioning holes 13 are symmetrically arranged on the temperature control plate 11 on both sides of the glue injection hole 12, and the auxiliary positioning holes 13 can fix the glue injection device; the lower end surface of the temperature control plate 11 is provided with mounting holes, and the upper end of the mounting hole is communicated with the lower end of the glue injection hole 12 through a glue injection channel 17. An oil injection hole 15 and an oil outlet hole are arranged on the side surface of the temperature control plate 11, and an oil channel communicating the oil injection hole 15 and the oil outlet hole is arranged inside the temperature control plate 11. The oil channel communicates with the side wall of the mounting hole. Four mounting holes are arranged at the lower end of the temperature control plate 11;
[0036] The glue injection channel 17 communicates the upper end of the mounting hole and the lower end of the glue injection hole 12 and the glue injection channel 17 is arranged in a cross shape, and the axis of the glue injection channel 17 coincides with the diagonal line of the plane of the temperature control plate 11. The outer end of the glue injection channel 17 communicates with the outside of the temperature control plate 11, and a blocking column 18 is plugged at the outer end of the glue injection channel 17. Thus, the four mounting holes can be injected with glue. When the temperature control plate 11 is formed, the glue injection channel 17 can be directly formed. The glue injection channel 17 is arranged in a cross shape, which is convenient for subsequent processing. Then, the end of the glue injection channel 17 is blocked by the blocking column 18. The hot-melt rubber entering the temperature control plate 11 from the glue injection hole 12 enters the glue injection channel 17. Due to the arrangement of the blocking column 18, the hot-melt rubber entering the glue injection channel 17 will be sent into the mounting hole;
[0037] An oil injection hole 15 and an oil outlet hole are arranged on the side surface of the temperature control plate 11, and an oil channel communicating the oil injection hole 15 and the oil outlet hole is arranged inside the temperature control plate 11. The oil channel communicates with the side wall of the mounting hole. The side walls between the mounting holes are communicated through an oil inlet branch pipe 111, and a blocking column 18 is plugged at the outer end of the oil inlet branch pipe 111. An oil inlet main pipe is communicated with the oil inlet branch pipe 111, and the oil inlet main pipe is communicated with the oil injection hole 15. An oil outlet branch pipe 112 is communicated between the side walls between the mounting holes above the oil inlet branch pipe 111, and a blocking column 18 is plugged at the outer end of the oil outlet branch pipe 112. An oil outlet main pipe is communicated with the oil outlet branch pipe 112, and the oil outlet main pipe is communicated with the oil outlet hole. The arrangement of the oil inlet branch pipe and the oil outlet branch pipe is convenient for the processing of the temperature control plate 11. The oil inlet branch pipe is arranged below the oil outlet branch pipe to increase the residence time of the heat-conducting oil, so as to realize the heat exchange between the heat-conducting oil and the hot-melt rubber, and thus ensure the temperature of the hot-melt rubber.
[0038] A glue injection nozzle capable of passing through the heating plate 2 and mating with the feeding end of the mold 3 is provided in the installation hole. The upper end of the glue injection nozzle is fitted and installed with the upper end of the installation hole, and the lower end of the glue injection nozzle is fitted and installed with the feeding end of the mold 3. The installation hole includes a connection section provided inside the constant temperature plate 11. The connection section is provided at the discharge end of the over-injection glue channel 17. The upper end of the glue injection nozzle is inserted at the connection section. A plurality of outwardly expanding positioning sections are provided outside the connection section. A sealing gasket is provided at the edge of the positioning section. An oil supply hole communicating with the oil outlet branch pipe is opened on the positioning section close to the connection section. A drain hole communicating with the oil inlet branch pipe is opened on the positioning section close to the positioning section. A plurality of fixing holes for fixing the glue injection nozzle are evenly opened on the end face of the positioning section close to the lower end face of the constant temperature plate 11.
[0039] The glue injection nozzle includes a nozzle body 41. A fixing plate 42 fixed to the end face of the positioning section is provided at the upper end of the nozzle body 41. A positioning through hole 43 corresponding to the fixing hole is provided on the fixing plate 42. A plurality of fixing sections 44 with gradually decreasing outer diameters are provided above the fixing plate 42. The top end of the fixing section 44 is fitted and installed with the connection section. A rubber channel 45 for conveying hot melt rubber is opened at the centers of the nozzle body 41, the fixing plate 42, and the fixing section 44. A heat preservation cavity 46 is arranged around the outside of the rubber channel 45. An oil inlet 47 corresponding to the oil inlet hole and communicating with the heat preservation cavity 46 is opened on the fixing section 44. An oil outlet 48 corresponding to the oil outlet hole and communicating with the heat preservation cavity 46 is also opened on the fixing section 44. A heat preservation sleeve 49 is sleeved outside the nozzle body 41. The lower end of the nozzle body 41 is flush with the lower end of the heat preservation sleeve 49. The lower end of the nozzle body 41 is fitted and installed with the mold 3. After the heat-conducting oil enters the heat preservation cavity 46, the heat-conducting oil exchanges heat with the hot melt rubber inside the glue injection nozzle, thereby ensuring the heat of the hot melt rubber, that is, ensuring the constant temperature of the hot melt rubber.
[0040] One end face of the heating plate 2 is fixedly connected to the constant temperature plate 11 through a heat insulation plate 22. The heat insulation plate 22 here can achieve temperature isolation between the heating plate 2 and the constant temperature plate, avoiding the heat of the heating plate 2 being transferred to the constant temperature plate when the heating plate 2 is heating. The heat of the heating plate 2 will cause the rubber fed into the constant temperature plate to heat up. At high temperatures, the rubber will undergo thermal decomposition, resulting in the breaking of molecular chains and the intensification of oxidation reactions. In this case, the strength, elasticity, and wear resistance of the rubber will be reduced, and even the rubber will deteriorate. Therefore, the heat insulation plate 22 is provided to prevent the heat of the heating plate 2 from being transferred to the constant temperature plate. The other end face of the heating plate 2 is fixedly connected to the upper end of the mold 3. A plurality of heating rods 21 are inserted through the side surface of the heating plate 2. The plane where the axis of the heating rod 21 is located is perpendicular to the plane where the center line of the end face of the heating plate 2 is located. A through hole for passing through the glue injection nozzle is provided on the heating plate 2. The heating rods 21 of the heating plate 2 can heat the hot melt rubber injected into the mold to achieve vulcanization molding.
[0041] The mold 3 includes an upper mold 31 and a lower mold 32 that are buckled up and down. A feed hole 33 corresponding to the glue injection nozzle is provided in the upper part of the upper mold 31. A feed through hole 34 corresponding to the rubber channel 45 is provided at the end of the feed hole 33. A upper mold cavity 35 surrounding the feed through hole 34 is provided in the lower part of the upper mold 31. The upper mold cavities 35 are communicated through an upper mold groove 36, and the feed through hole 34 is provided at the intersection center of the upper mold groove 36. A lower mold cavity 37 for placing the core is provided in the upper part of the lower mold 32 and forms the lower mold cavity 37 with the upper mold cavity 35. The lower mold cavities 37 are communicated through a lower mold groove 38. A channel for passing through the hot melt rubber is formed between the upper mold groove 36 and the lower mold groove 38.
[0042] When the utility model is in use, the glue injection device injects hot-melt rubber into the constant temperature plate 11. The hot-melt rubber entering the constant temperature plate 11 from the glue injection hole 12 enters the glue injection channel 17. Due to the arrangement of the blocking column 18, the hot-melt rubber entering the glue injection channel 17 will be sent into the installation hole. The setting of the constant temperature plate 11 can isolate the entry of external heat and at the same time ensure the temperature of the hot-melt rubber flowing into the constant temperature plate 11. The hot-melt rubber is sent to the glue injection nozzle through the glue injection channel 17. The heat-conducting oil with a certain temperature will be sent into the heat preservation cavity 46 through the oil channel. The setting of the heat preservation cavity 46 can ensure the temperature of the hot-melt rubber flowing in the glue injection nozzle. The heat-conducting oil will exchange heat with the hot-melt rubber in the glue injection nozzle in the heat preservation cavity 46, so as to ensure that the hot-melt rubber maintains a certain temperature. The heat-conducting oil circulates through the oil channel, so as to ensure the heat of the heat-conducting oil. The constant temperature plate insulates the fed rubber, and the constant-temperature heat-conducting oil can ensure the heat of the hot-melt rubber, avoiding the blockage of the glue injection nozzle. At the same time, the heat insulation plate 22 can isolate the heating of the heating plate to the constant temperature plate, and the heat of the heating plate can be isolated from being transmitted to the glue injection nozzle through the heat preservation cavity, avoiding the vulcanization and molding of the rubber in the glue injection nozzle caused by the heating of the heating plate and resulting in the blockage of the glue injection nozzle. The setting of the heating plate can heat the mold, and the temperature rise of the mold can vulcanize and form the hot-melt rubber sent by the glue injection nozzle, so as to ensure the forming quality of the sealing ring.
[0043] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacement or change, and should be covered within the protection scope of the present utility model.
Claims
1. A molding die for producing a sealing ring, comprising a mold (3), characterized in that: A constant temperature plate (11) is provided at the feeding end of the mold (3), a heating plate (2) is provided between the constant temperature plate (11) and the mold (3), the heating plate (2) and the constant temperature plate (11) are connected via a heat insulation plate (22), a glue injection hole (12) is provided on the upper end surface of the constant temperature plate (11), a mounting hole is provided on the lower end surface of the constant temperature plate (11), the upper end of the mounting hole and the lower end of the glue injection hole (12) are connected via a glue injection channel (17), and an oil injection hole (12) is provided on the side surface of the constant temperature plate (11). 15) and an oil outlet hole, an oil passage connecting the oil injection hole (15) and the oil outlet hole is provided inside the constant temperature plate (11), the oil passage is connected to the side wall of the mounting hole, a glue injection nozzle is provided in the mounting hole and can pass through the heating plate (2) and cooperate with the feed end of the mold (3), the upper end of the glue injection nozzle is installed in cooperation with the upper end of the mounting hole, and the lower end of the glue injection nozzle is installed in cooperation with the feed end of the mold (3), and a heat preservation cavity (46) is provided in the glue injection nozzle, and the oil inlet end and the oil outlet end of the heat preservation cavity (46) are respectively connected to the oil passage.
2. A molding die for producing a sealing ring according to claim 1, characterized in that: The lower end of the thermostatic plate (11) is provided with four mounting holes, the glue injection channel (17) is connected to the upper end of the mounting hole and the lower end of the glue injection hole (12), and the glue injection channel (17) is arranged in a cross shape, and the axis of the glue injection channel (17) coincides with the plane diagonal of the thermostatic plate (11), the outer end of the glue injection channel (17) is connected to the outside of the thermostatic plate (11), and the outer end plug of the glue injection channel (17) is provided with a blocking column (18).
3. A molding die for producing a sealing ring according to claim 2, characterized in that: The side walls between the mounting holes are connected via an oil inlet branch pipe (111), an outer end plug of the oil inlet branch pipe (111) is provided with a plugging column (18), the oil inlet branch pipe (111) is connected to an oil inlet main pipe, and the oil inlet main pipe is connected to the oil injection hole (15).
4. A molding die for producing a sealing ring according to claim 3, characterized in that: An oil outlet branch pipeline (112) is connected between the side walls between the mounting holes above the oil inlet branch pipeline (111), an outer end plug of the oil outlet branch pipeline (112) is provided with a plugging column (18), the oil outlet branch pipeline (112) is connected to an oil outlet main pipeline, and the oil outlet main pipeline is connected to the oil outlet hole.
5. A molding die for producing a sealing ring according to claim 4, characterized in that: The end face of the heating plate (2) is fixedly connected to the upper end of the mold (3); a plurality of heating rods (21) are provided on the side face of the heating plate (2); the plane where the axes of the heating rods (21) are located is perpendicularly arranged to the plane where the center lines of the end faces of the heating plate (2) are located; and a through hole for passing the glue injection nozzle is provided on the heating plate (2).
6. A molding die for producing a sealing ring according to claim 5, characterized in that: The mounting hole comprises a connecting section arranged inside the thermostatic plate (11), the connecting section being arranged at the discharge end of the glue injection channel (17), the upper end of the glue injection nozzle being inserted into the connecting section, a plurality of outwardly expanding positioning sections being arranged outside the connecting section, a sealing gasket being arranged at the edge of the positioning section, an oil inlet hole communicating with the oil outlet branch pipe being arranged on the positioning section close to the connecting section, an oil discharge hole communicating with the oil inlet branch pipe being arranged on the positioning section close to the positioning section, and a plurality of fixing holes for fixing the glue injection nozzle being evenly arranged on the end surface of the positioning section close to the lower end surface of the thermostatic plate (11).
7. A forming die for producing a sealing ring according to claim 6, characterized in that: The glue injection nozzle comprises a nozzle body (41), the upper end of the nozzle body (41) is provided with a fixing plate (42) fixed to the end surface of the positioning section, the fixing plate (42) is provided with a positioning through hole (43) corresponding to the fixing hole, the upper part of the fixing plate (42) is provided with a plurality of fixing sections (44) with decreasing outer diameters, the top end of the fixing section (44) is mounted in cooperation with the connecting section, and the centers of the nozzle body (41), the fixing plate (42) and the fixing section (44) are provided with a rubber channel (45) for conveying hot melt rubber. ), the heat-insulating cavity (46) is arranged around the outside of the rubber channel (45), the fixed section (44) is provided with an oil inlet (47) corresponding to the oil inlet hole and connected to the heat-insulating cavity (46), the fixed section (44) is also provided with an oil outlet (48) corresponding to the oil outlet hole and connected to the heat-insulating cavity (46), the outside of the nozzle body (41) is covered with a heat-insulating sleeve (49), the lower end of the nozzle body (41) is arranged flush with the lower end of the heat-insulating sleeve (49), and the lower end of the nozzle body (41) is mounted in cooperation with the mold (3).
8. A forming die for producing a sealing ring according to claim 7, characterized in that: The mold (3) comprises an upper mold (31) and a lower mold (32) which are buckled together. A feed hole (33) corresponding to the glue injection nozzle is opened on the upper part of the upper mold (31). A feed through hole (34) corresponding to the rubber channel (45) is arranged at the end of the feed hole (33). An upper mold cavity (35) is arranged around the feed through hole (34) at the lower part of the upper mold (31). The upper mold cavities (35) are connected to each other through an upper mold groove (36), and the feed through hole (34) is arranged at the intersection center of the upper mold groove (36). A lower mold cavity (37) for placing a core is arranged on the upper part of the lower mold (32). The lower mold cavities (37) are connected to each other through a lower mold groove (38). A channel for passing hot melt rubber is formed between the upper mold groove (36) and the lower mold groove (38).
9. A molding die for producing a sealing ring according to any one of claims 1 to 8, characterized in that: Symmetrically arranged auxiliary positioning holes (13) are provided on the constant temperature plate (11) on both sides of the glue injection hole (12).