Rubber sealing ring integrated forming die and preparation process thereof

Abstract

The application relates to the technical field of rubber sealing ring manufacturing, in particular to a rubber sealing ring integrated forming die and a preparation process thereof, which comprises a die body and a driving mechanism; the die body comprises a lower die and an upper die; the upper surface of the lower die and the lower surface of the upper die are both provided with a forming die cavity matched with a rubber sealing ring framework; when the rubber sealing ring with a framework is produced, the framework can be previously placed into the forming die cavity on the lower die, a driving motor is started to drive a vertical threaded column to rotate, the rotation of the vertical threaded column drives a lifting plate to move downwards, when the lifting plate moves downwards, the upper die can be driven to move downwards and automatically combine with the lower die, then raw materials are injected through a grouting hole, heated through an electric heating rod and cooled, the rapid forming of the rubber sealing ring with a framework is realized, and the production efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of rubber sealing ring manufacturing technology, and in particular to an integral molding mold for rubber sealing rings and its preparation process. Background Technology

[0002] Rubber seals, as core sealing elements in the equipment manufacturing field, are widely used in critical scenarios such as hydraulic and pneumatic systems, construction machinery, automotive transmissions, and wind power. Their sealing reliability and service life directly determine the operational stability and safety of the entire equipment. Currently, in the production process of skeletonized rubber seals, the traditional molding process has long relied on split molds and manual operation, which has revealed many pain points in actual production that are difficult to adapt to the needs of high-end manufacturing.

[0003] First, traditional molding dies generally employ a single isothermal vulcanization structure, which cannot accurately match the process requirements of rubber vulcanization: "gradient heating - isothermal setting - rapid cooling." Either they only have a heating module, leading to prolonged natural cooling after vulcanization and low production efficiency, or the cooling path design is unreasonable, resulting in uneven mold cavity temperature and localized stress residue in the sealing ring. This directly causes defects in the finished product such as edge shrinkage, bubbles, and delamination between the skeleton and the rubber layer, making it difficult to meet the dimensional tolerance requirements of high-precision seals. Simultaneously, the mold closing and opening actions of most existing molds rely on manual operation of the press. The mold alignment accuracy is greatly affected by human factors, easily leading to mold misalignment and rubber overflow. This not only increases the cost of subsequent trimming processes but also results in poor batch-to-batch product consistency, making it unsuitable for the precision molding requirements of sealing rings made of special materials such as fluororubber and silicone rubber.

[0004] Secondly, the demolding process for existing skeleton-type sealing rings has long relied on manual prying or single ejector pins. This not only easily scratches the sealing surface of the ring, causing product scrap, but also suffers from low operational efficiency and high labor intensity. Some large sealing components even require multiple people to complete the demolding, further lengthening the production cycle for each batch. More importantly, most existing demolding mechanisms require additional independent drive sources, which increases the overall complexity of the mold structure and equipment investment costs. Furthermore, the coordination errors of multiple power sources can easily lead to asynchronous ejection and localized deformation of the sealing ring, seriously affecting the yield rate of finished products.

[0005] Therefore, this application provides an integral molding die for a rubber sealing ring and its manufacturing process. Summary of the Invention

[0006] The purpose of this application is to solve at least one technical problem raised in the background art.

[0007] This application provides an integral molding mold for a rubber sealing ring, including a mold body and a driving mechanism;

[0008] The mold body includes a lower mold and an upper mold. The upper surface of the lower mold and the lower surface of the upper mold are provided with molding cavities adapted to the rubber sealing ring skeleton. The top of the upper mold is provided with an injection port extending into the molding cavity. The outer surface of the lower mold is provided with an installation groove, and the inner wall of the installation groove is provided with an electric heating rod. The interior of the lower mold is also provided with a cooling cavity.

[0009] The driving mechanism includes a mounting frame and a lifting plate that is slidably disposed on the inner wall of the mounting frame. The lower mold is disposed on the inner bottom wall of the mounting frame, and the top end of the upper mold is fixedly connected to the bottom end of the lifting plate. The driving mechanism also includes a drive motor fixedly disposed on the top end of the mounting frame for driving the lifting plate to move up and down.

[0010] Preferably, the inner wall of the cooling chamber is provided with a cooling water inlet pipe and a cooling water outlet pipe, and the other end of the cooling water inlet pipe and the cooling water outlet pipe extends to the outer surface of the lower mold.

[0011] By adopting the above technical solution, cooling water can be transported to the cooling chamber through the cooling water inlet pipe by an external water pump to cool the mold body. At the same time, hot water is discharged through the cooling water outlet pipe to achieve the purpose of rapid cooling.

[0012] Preferably, the inner sidewall of the mounting frame has a rectangular opening, the output end of the drive motor extends into the interior of the rectangular opening and is fixed with a vertical threaded column, the inner top wall and inner bottom wall of the rectangular opening are fixed with two symmetrical limiting rods, the lifting plate is slidably connected to the inner wall of the rectangular opening, and the upper surface of the lifting plate is respectively provided with threaded holes that are threadedly connected to the outer surface of the vertical threaded column, and sliding holes that are slidably connected to the surfaces of the two limiting rods.

[0013] By adopting the above technical solution, the lifting plate can be automatically raised and lowered by the rotation of the vertical threaded column, and the stability of the lifting plate during the raising and lowering is ensured by the action of the limit rod.

[0014] Preferably, the lower mold is provided with an ejector mechanism, which includes an insulating fixing ring fixed to the bottom wall of the mounting frame. The lower mold is fixed to the upper surface of the insulating fixing ring. The inner bottom wall of the forming cavity of the lower mold is provided with a plurality of sealing grooves in a circumferential array. A sealing top plate is slidably provided on the inner wall of the sealing groove. A vertical hole extending to the bottom of the lower mold is provided on the inner bottom wall of the sealing groove. A top rod is fixed on the lower surface of the sealing top plate and slidably connected to the inner wall of the vertical hole.

[0015] By adopting the above technical solution, the molding rubber ring in the molding cavity can be automatically ejected by the pushing action of the sealing top plate.

[0016] Preferably, a sliding disc is slidably provided on the inner wall of the heat-insulating fixing ring, and the bottom ends of several push rods are fixedly connected to the upper surface of the sliding disc. A return spring is sleeved on the surface of the push rod, and the two ends of the return spring are fixedly connected to the lower surface of the lower mold and the upper surface of the sliding disc, respectively.

[0017] By adopting the above technical solution, the lifting of the sliding plate can drive several push rods to move automatically upward, thereby driving the sealing top plate to automatically push out the finished rubber ring.

[0018] Preferably, a vertical lead screw is rotatably provided between the lower surface of the lower mold and the inner bottom wall of the mounting frame, and the upper surface of the sliding plate is provided with a mounting hole corresponding to the vertical lead screw, and the inner wall of the mounting hole is fixed with an internal threaded sleeve that is threaded to the outer surface of the vertical lead screw.

[0019] By adopting the above technical solution, the sliding disc can be automatically raised and lowered by rotating the vertical lead screw and under the action of the internal threaded sleeve.

[0020] Preferably, the inner wall of the heat-insulating fixing ring is provided with a rectangular hole, the inner wall of the rectangular hole is slidably connected with a rack, the bottom outer surface of the vertical lead screw is fixed with a gear plate that meshes with the rack, the lower surface of the rack is fixed with a T-shaped slide bar, and the inner bottom wall of the rectangular hole is provided with a T-shaped limiting groove for the T-shaped slide bar to slide.

[0021] By adopting the above technical solution, the movement of the rack can drive the rotation of the gear plate, thereby driving the vertical lead screw to rotate automatically.

[0022] Preferably, the side of the mounting frame is provided with a notch, and a gearbox is fixedly mounted on the inner top wall of the notch by a mounting rod. A one-way ratchet mechanism is provided on the top of the gearbox. The bottom end of the vertical threaded column extends to the inner top of the notch and is fixedly connected to the input end of the one-way ratchet mechanism. The output end of the one-way ratchet mechanism is fixedly connected to the input end of the gearbox. An output shaft is fixedly mounted on the output end of the gearbox. A connecting plate is fixedly mounted on the side of the mounting frame. A rotating shaft is rotatably mounted on the lower surface of the connecting plate. A driving wheel is fixedly mounted on the bottom end of the output shaft. A driven wheel is fixedly mounted on the surface of the rotating shaft. A transmission belt is sleeved on the surfaces of the driving wheel and the driven wheel.

[0023] By adopting the above technical solution, when the drive motor drives the lifting plate to move downward, that is, when the vertical threaded column is driven to rotate forward, it cannot drive the output shaft to rotate. At the same time, when the drive motor drives the lifting plate to move upward, that is, when the vertical threaded column is driven to rotate in reverse, it can drive the output shaft to rotate. The rotation of the output shaft can drive the rotating shaft to rotate automatically through the driving wheel, transmission belt and driven wheel.

[0024] Preferably, a rotating disk is fixedly provided at the bottom end of the rotating shaft, a connecting rod is rotatably provided on the lower surface of the rotating disk, the other end of the connecting rod is rotatably connected to the end of the rack, a first connecting shaft is fixedly provided on the lower surface of the rotating disk, and a limiting disk is fixedly provided at the bottom end of the first connecting shaft, a rotating frame is fixedly provided at the end of the rack, a second connecting shaft is fixedly provided on the inner wall of the rotating frame, and rotating holes are provided at both ends of the connecting rod, which are respectively rotatably connected to the surfaces of the first connecting shaft and the second connecting shaft.

[0025] By adopting the above technical solution, the rotation of the shaft can drive the rotating disk to rotate automatically. When the rotating disk rotates, it can pull the rack through the connecting rod, thereby realizing the automatic reciprocating movement of the rack.

[0026] This application also provides a process for integrally molding a rubber sealing ring, including the following steps:

[0027] S1. Skeleton pretreatment: Place the metal skeleton (steel or copper) into an ultrasonic cleaning tank and clean it at 60-80℃ for 10-15 minutes to remove surface oil stains; then perform acid pickling to remove the oxide layer; subsequently perform phosphating treatment to form a uniform phosphating film on the skeleton surface.

[0028] S2. Glue coating of the skeleton: Apply adhesive to the pretreated skeleton in a centrifugal glue coater. The glue coating thickness is controlled at 10-20μm. Do not dry or pre-cure after gluing.

[0029] S3. Mold loading and sealing: The coated skeleton is placed into the molding cavity of the mold body. After the mold is closed, the mixed rubber material is injected into the mold cavity through the injection port. Vacuum injection is used to avoid air bubbles from entering.

[0030] S4. Heating: Activate the electric heating rod to heat the rubber and ensure a firm bond between the rubber and the skeleton.

[0031] S5. Cooling: Inject cooling water into the cooling chamber to cool and set the rubber ring.

[0032] S6. Open the mold, start the drive motor to reverse, and drive the upper mold and lower mold to automatically separate.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The integrated molding die for a rubber sealing ring and its manufacturing process described in this application, by setting up a die body and a drive mechanism, allows the skeleton to be pre-placed into the molding cavity of the lower die during the production of the skeleton rubber sealing ring. The drive motor is then started to rotate the vertical threaded column, which in turn causes the lifting plate to move downward. When the lifting plate moves downward, it causes the upper die to move downward and automatically close with the lower die. Then, the raw material is injected through the injection hole, heated by an electric heating rod, and then cooled, thus achieving rapid molding of the skeleton rubber sealing ring and effectively improving production efficiency.

[0035] 2. The integrated molding die for a rubber sealing ring and its manufacturing process described in this application, by setting an ejector mechanism, after molding, can drive the vertical threaded column to reverse through the reverse rotation of the drive motor, thereby causing the lifting plate to move automatically upward, realizing the automatic opening of the upper and lower molds. When the vertical threaded column reverses, the output shaft is driven to rotate at a reduced speed through a one-way ratchet mechanism and a reduction gearbox. The rotation of the output shaft drives the drive wheel to rotate. The rotation of the drive wheel drives the driven wheel and the rotating shaft to rotate at a reduced speed through a transmission belt, thereby causing the rotating disk to rotate slowly. When the lifting plate rises to half the distance, it drives the rotating disk to rotate 180 degrees, thereby driving the continuous... The rod pushes the rack, causing it to move. The rack's movement drives the gear plate and vertical screw to rotate automatically. The automatic rotation of the vertical screw, under the action of the internal threaded sleeve, drives the sliding plate to move automatically upward, thereby driving several push rods to move upward. This causes the sealing top plate to automatically eject the finished product from the lower mold forming cavity, achieving the purpose of automatic ejection. The finished product is then removed by an external clamping device. As the lifting plate continues to rise, it drives the rotating plate to continue rotating. Through the connecting rod, it drives the rack to move in the opposite direction, thereby driving the vertical screw to rotate in the opposite direction. This drives the sliding plate and sealing top plate to reset, facilitating the next molding operation of the skeleton rubber sealing ring. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of this application;

[0037] Figure 2 This is a schematic diagram of the rear view structure of this application;

[0038] Figure 3 This is a side view structural diagram of this application;

[0039] Figure 4 This is a schematic diagram of the cross-sectional structure of the mold body in this application;

[0040] Figure 5 This application Figure 4 Enlarged structural diagram at point A in the middle;

[0041] Figure 6 This is a schematic diagram of the structure from below in this application;

[0042] Figure 7 This application Figure 6 Enlarged structural diagram at point B.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Mold body; 101. Lower mold; 102. Upper mold; 103. Electric heating rod; 104. Cooling chamber; 105. Cooling water inlet pipe; 106. Cooling water outlet pipe;

[0045] 200. Drive mechanism; 201. Mounting frame; 202. Lifting plate; 203. Drive motor; 204. Vertical threaded post; 205. Limiting rod;

[0046] 300. Ejector mechanism; 301. Insulating retaining ring; 302. Sealing top plate; 303. Ejector rod; 304. Sliding disc; 305. Return spring; 306. Vertical lead screw; 307. Internal threaded sleeve; 308. Rack; 309. Gear disc; 3010. T-shaped slide bar; 3011. Gearbox; 3012. Output shaft; 3013. Rotating shaft; 3014. Driving wheel; 3015. Driven wheel; 3016. Transmission belt; 3017. Rotating disc; 3018. Connecting rod. Detailed Implementation

[0047] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application will be described in further detail below.

[0048] Example 1

[0049] Please refer to the following carefully. Figures 1 to 4 A rubber sealing ring integral molding mold includes a mold body 100 and a drive mechanism 200. The mold body 100 includes a lower mold 101 and an upper mold 102. The upper surface of the lower mold 101 and the lower surface of the upper mold 102 are provided with molding cavities adapted to the rubber sealing ring skeleton. The top of the upper mold 102 is provided with an injection port extending into the molding cavity. The outer surface of the lower mold 101 is provided with an installation groove. An electric heating rod 103 is provided on the inner wall of the installation groove. A cooling cavity 104 is also provided inside the lower mold 101. The drive mechanism 200 includes an installation frame 201 and a lifting plate 202 slidably disposed on the inner wall of the installation frame 201. The lower mold 101 is disposed on the inner bottom wall of the installation frame 201, and the top end of the upper mold 102 is fixedly connected to the bottom end of the lifting plate 202. The drive mechanism 200 also includes a drive motor 203 fixedly disposed on the top end of the installation frame 201 for driving the lifting plate 202 to rise and fall.

[0050] Please refer to this carefully. Figure 2 , Figure 4The inner wall of the cooling chamber 104 is provided with a cooling water inlet pipe 105 and a cooling water outlet pipe 106, and the other end of the cooling water inlet pipe 105 and the cooling water outlet pipe 106 extends to the outer surface of the lower mold 101.

[0051] Specifically, an external water pump can deliver cooling water to the cooling chamber 104 through the cooling water inlet pipe 105 to cool the mold body 100. At the same time, hot water is discharged through the cooling water outlet pipe 106 to achieve rapid cooling.

[0052] Please refer to this carefully. Figure 2 , Figure 3 The inner wall of the mounting frame 201 has a rectangular opening. The output end of the drive motor 203 extends into the interior of the rectangular opening and is fixed with a vertical threaded post 204. The inner top wall and inner bottom wall of the rectangular opening are fixed with two symmetrical limiting rods 205. The lifting plate 202 is slidably connected to the inner wall of the rectangular opening. The upper surface of the lifting plate 202 is respectively provided with threaded holes that are threadedly connected to the outer surface of the vertical threaded post 204, and sliding holes that are slidably connected to the surfaces of the two limiting rods 205.

[0053] Specifically, the vertical threaded column 204 can drive the lifting plate 202 to automatically rise and fall, while the limit rod 205 can ensure the stability of the lifting plate 202 during the rising and falling.

[0054] In this embodiment, by setting up a mold body 100 and a drive mechanism 200, when producing a rubber sealing ring with a skeleton, the skeleton can be pre-placed into the molding cavity on the lower mold 101, and the drive motor 203 is started to drive the vertical threaded column 204 to rotate. The rotation of the vertical threaded column 204 drives the lifting plate 202 to move downward. When the lifting plate 202 moves downward, it can drive the upper mold 102 to move downward and automatically close with the lower mold 101. Then, the raw material is injected through the injection hole, heated by the electric heating rod 103, and then cooled, realizing the rapid molding of the rubber sealing ring with a skeleton, which effectively improves the production efficiency.

[0055] Example 2

[0056] Based on Example 1, referring to Figures 4 to 7 And unlike Example 1, the following is true:

[0057] Please refer to this carefully. Figure 4 , Figure 5The lower mold 101 is provided with an ejector mechanism 300. The ejector mechanism 300 includes an insulating fixing ring 301 fixed to the inner bottom wall of the mounting frame 201. The lower mold 101 is fixed to the upper surface of the insulating fixing ring 301. The inner bottom wall of the forming cavity of the lower mold 101 is provided with a number of sealing grooves in a circumferential array. A sealing top plate 302 is slidably provided on the inner wall of the sealing groove. A vertical hole extending to the bottom of the lower mold 101 is provided on the inner bottom wall of the sealing groove. A top rod 303 that is slidably connected to the inner wall of the vertical hole is fixed on the lower surface of the sealing top plate 302.

[0058] Specifically, the molding rubber ring inside the molding cavity can be automatically ejected by the pushing action of the sealing top plate 302.

[0059] Please refer to this carefully. Figure 4 , Figure 5 The inner wall of the heat-insulating fixing ring 301 is slidably provided with a sliding disk 304. The bottom ends of several push rods 303 are fixedly connected to the upper surface of the sliding disk 304. The surface of the push rod 303 is fitted with a return spring 305. The two ends of the return spring 305 are fixedly connected to the lower surface of the lower mold 101 and the upper surface of the sliding disk 304, respectively.

[0060] Specifically, the lifting of the sliding plate 304 can drive several push rods 303 to move automatically upward, thereby driving the sealing top plate 302 to automatically push out the finished rubber ring.

[0061] Please refer to this carefully. Figure 4 , Figure 5 A vertical lead screw 306 is rotatably provided between the lower surface of the lower mold 101 and the inner bottom wall of the mounting frame 201. The upper surface of the sliding plate 304 is provided with a mounting hole corresponding to the vertical lead screw 306. The inner wall of the mounting hole is fixed with an internal threaded sleeve 307 that is threaded to the outer surface of the vertical lead screw 306.

[0062] Specifically, the vertical lead screw 306 can rotate and, under the action of the internal threaded sleeve 307, drive the sliding disc 304 to automatically rise and fall.

[0063] Please refer to this carefully. Figure 4 , Figure 5 The inner wall of the heat-insulating fixing ring 301 has a rectangular hole, and a rack 308 is slidably connected to the inner wall of the rectangular hole. The bottom outer surface of the vertical lead screw 306 is fixed with a gear plate 309 that meshes with the rack 308. The lower surface of the rack 308 is fixed with a T-shaped slide bar 3010, and the inner bottom wall of the rectangular hole has a T-shaped limiting groove for the T-shaped slide bar 3010 to slide.

[0064] Specifically, the movement of the rack 308 can drive the gear plate 309 to rotate, thereby driving the vertical lead screw 306 to rotate automatically.

[0065] Please refer to this carefully. Figure 6 , Figure 7 The mounting frame 201 has a notch on its side. A gearbox 3011 is fixed to the inner top wall of the notch by a mounting rod. A one-way ratchet mechanism is provided on the top of the gearbox 3011. The bottom end of the vertical threaded column 204 extends to the inner top of the notch and is fixedly connected to the input end of the one-way ratchet mechanism. The output end of the one-way ratchet mechanism is fixedly connected to the input end of the gearbox 3011. An output shaft 3012 is fixedly provided at the output end of the gearbox 3011. A connecting plate is fixedly provided on the side of the mounting frame 201. A rotating shaft 3013 is rotatably provided on the lower surface of the connecting plate. A drive wheel 3014 is fixedly provided at the bottom end of the output shaft 3012. A driven wheel 3015 is fixedly provided on the surface of the rotating shaft 3013. A transmission belt 3016 is sleeved on the surface of the drive wheel 3014 and the driven wheel 3015.

[0066] Specifically, when the drive motor 203 drives the lifting plate 202 to move downward, that is, when the vertical threaded column 204 rotates forward, it cannot drive the output shaft 3012 to rotate. At the same time, when the drive motor 203 drives the lifting plate 202 to move upward, that is, when the vertical threaded column 204 rotates in reverse, it can drive the output shaft 3012 to rotate. The rotation of the output shaft 3012 can drive the rotating shaft 3013 to rotate automatically through the driving wheel 3014, the transmission belt 3016 and the driven wheel 3015.

[0067] Please refer to this carefully. Figure 6 , Figure 7 A rotating disk 3017 is fixedly mounted at the bottom end of the rotating shaft 3013. A connecting rod 3018 is rotatably mounted on the lower surface of the rotating disk 3017. The other end of the connecting rod 3018 is rotatably connected to the end of the rack 308. A first connecting shaft is fixedly mounted on the lower surface of the rotating disk 3017, and a limiting disk is fixedly mounted at the bottom end of the first connecting shaft. A rotating frame is fixedly mounted at the end of the rack 308, and a second connecting shaft is fixedly mounted on the inner wall of the rotating frame. Rotary holes are opened at both ends of the connecting rod 3018, which are respectively rotatably connected to the surfaces of the first connecting shaft and the second connecting shaft.

[0068] Specifically, the rotation of the rotating shaft 3013 can drive the rotating disk 3017 to rotate automatically. When the rotating disk 3017 rotates, it can pull the rack 308 through the connecting rod 3018, thereby realizing the automatic reciprocating movement of the rack 308.

[0069] In this embodiment, by setting the ejector mechanism 300, after molding is completed, the vertical threaded column 204 can be reversed by the reverse rotation of the drive motor 203, thereby causing the lifting plate 202 to move automatically upward, realizing the automatic mold opening of the upper mold 102 and the lower mold 101. When the vertical threaded column 204 reverses, the output shaft 3012 is driven to rotate at a reduced speed through the one-way ratchet mechanism and the reduction gearbox 3011. The rotation of the output shaft 3012 drives the drive wheel 3014 to rotate. The rotation of the drive wheel 3014 drives the driven wheel 3015 and the rotating shaft 3013 to rotate at a reduced speed through the transmission belt 3016, thereby causing the rotating disk 3017 to rotate slowly. When the lifting plate 202 rises to half the distance, it drives the rotating disk 3017 to rotate 180 degrees, thereby driving the connecting rod 3018 to the rack 3 08 is pushed up, causing the rack 308 to move. The movement of the rack 308 drives the gear plate 309 and the vertical screw 306 to rotate automatically. The automatic rotation of the vertical screw 306, under the action of the internal threaded sleeve 307, drives the sliding plate 304 to move automatically upward, thereby driving several push rods 303 to move upward, driving the sealing top plate 302 to automatically push out the finished product in the forming cavity of the lower mold 101, achieving the purpose of automatic material ejection. The finished product is then taken out by the external clamping device. When the lifting plate 202 continues to rise, it drives the rotating plate 3017 to continue rotating. Through the connecting rod 3018, it drives the rack 308 to move in the opposite direction, thereby driving the vertical screw 306 to rotate in the opposite direction, driving the sliding plate 304 and the sealing top plate 302 to reset, facilitating the next molding operation of the skeleton rubber sealing ring.

[0070] This application also provides a process for integrally molding a rubber sealing ring, including the following steps:

[0071] S1. Pre-treatment of the skeleton: Place the metal skeleton in an ultrasonic cleaning tank and clean it at 60-80℃ for 10-15 minutes to remove surface oil stains; then perform acid pickling (5%-8% hydrochloric acid solution, room temperature, 2-3 minutes) to remove the oxide layer; subsequently perform phosphating treatment (zinc phosphate phosphating solution, 50-60℃, 5-8 minutes) to form a uniform phosphating film (2-5 μm thick) on the skeleton surface.

[0072] S2. Glue coating of skeleton: Apply adhesive (Chemlock or Rohm and Haas series adhesives) to the pretreated skeleton in a centrifugal glue coater. The glue coating thickness is controlled at 10-20μm. Do not dry or pre-cure after glue coating.

[0073] S3. Mold loading and sealing: The coated skeleton is placed into the molding cavity of the mold body 100. After the mold is closed, the mixed rubber compound is injected into the mold cavity through the injection port. Vacuum injection is used (vacuum degree -0.06 to -0.08 MPa) to avoid air bubbles from entering.

[0074] S4. Heating: Activate the electric heating rod 103 to heat the rubber and make it bond firmly to the skeleton.

[0075] S5. Cooling: Inject cooling water into the cooling chamber 104 to cool and set the rubber ring.

[0076] S6. Open the mold, start the drive motor 203 to reverse, and drive the upper mold 102 and the lower mold 101 to automatically separate.

Claims

1. A mold for integral molding of a rubber sealing ring, characterized in that, Includes mold body (100) and drive mechanism (200); The mold body (100) includes a lower mold (101) and an upper mold (102). The upper surface of the lower mold (101) and the lower surface of the upper mold (102) are provided with molding cavities adapted to the rubber sealing ring skeleton. The top of the upper mold (102) is provided with an injection port extending into the molding cavity. The outer surface of the lower mold (101) is provided with an installation groove. An electric heating rod (103) is provided on the inner wall of the installation groove. A cooling cavity (104) is also provided inside the lower mold (101). The drive mechanism (200) includes a mounting frame (201) and a lifting plate (202) that is slidably disposed on the inner wall of the mounting frame (201). The lower mold (101) is disposed on the inner bottom wall of the mounting frame (201), and the top end of the upper mold (102) is fixedly connected to the bottom end of the lifting plate (202). The drive mechanism (200) also includes a drive motor (203) fixed on the top end of the mounting frame (201) for driving the lifting plate (202) to rise and fall.

2. The integral molding mold for a rubber sealing ring according to claim 1, characterized in that, The inner wall of the cooling chamber (104) is provided with a cooling water inlet pipe (105) and a cooling water outlet pipe (106), and the other end of the cooling water inlet pipe (105) and the cooling water outlet pipe (106) extends to the outer surface of the lower mold (101).

3. The integral molding mold for a rubber sealing ring according to claim 2, characterized in that, The inner wall of the mounting frame (201) has a rectangular opening. The output end of the drive motor (203) extends into the rectangular opening and is fixed with a vertical threaded column (204). The inner top wall and inner bottom wall of the rectangular opening are fixed with two symmetrical limiting rods (205). The lifting plate (202) is slidably connected to the inner wall of the rectangular opening. The upper surface of the lifting plate (202) is respectively provided with threaded holes that are threadedly connected to the outer surface of the vertical threaded column (204) and sliding holes that are slidably connected to the surfaces of the two limiting rods (205).

4. The integral molding mold for a rubber sealing ring according to claim 3, characterized in that, The lower mold (101) is provided with an ejector mechanism (300). The ejector mechanism (300) includes an insulating fixing ring (301) fixed to the inner bottom wall of the mounting frame (201). The lower mold (101) is fixed to the upper surface of the insulating fixing ring (301). The inner bottom wall of the forming cavity of the lower mold (101) is provided with a plurality of sealing grooves in a circumferential array. A sealing top plate (302) is slidably provided on the inner wall of the sealing groove. A vertical hole extending to the bottom of the lower mold (101) is provided on the inner bottom wall of the sealing groove. A top rod (303) slidably connected to the inner wall of the vertical hole is fixed on the lower surface of the sealing top plate (302).

5. The integral molding mold for a rubber sealing ring according to claim 4, characterized in that, The inner wall of the heat-insulating fixing ring (301) is slidably provided with a sliding disk (304), and the bottom ends of several push rods (303) are fixedly connected to the upper surface of the sliding disk (304). The surface of the push rod (303) is sleeved with a return spring (305), and the two ends of the return spring (305) are fixedly connected to the lower surface of the lower mold (101) and the upper surface of the sliding disk (304) respectively.

6. The integral molding mold for a rubber sealing ring according to claim 5, characterized in that, A vertical lead screw (306) is rotatably provided between the lower surface of the lower mold (101) and the inner bottom wall of the mounting frame (201). The upper surface of the sliding disk (304) is provided with a mounting hole corresponding to the vertical lead screw (306). The inner wall of the mounting hole is fixed with an internal thread sleeve (307) that is threaded to the outer surface of the vertical lead screw (306).

7. The integral molding mold for a rubber sealing ring according to claim 6, characterized in that, The inner wall of the heat-insulating fixing ring (301) is provided with a rectangular hole, and a rack (308) is slidably connected to the inner wall of the rectangular hole. The bottom outer surface of the vertical screw (306) is fixed with a gear plate (309) that meshes with the rack (308). The lower surface of the rack (308) is fixed with a T-shaped slide bar (3010), and the inner bottom wall of the rectangular hole is provided with a T-shaped limiting groove for the T-shaped slide bar (3010) to slide.

8. The integral molding mold for a rubber sealing ring according to claim 7, characterized in that, The mounting frame (201) has a notch on its side. A gearbox (3011) is fixed to the inner top wall of the notch by a mounting rod. A one-way ratchet mechanism is provided on the top of the gearbox (3011). The bottom end of the vertical threaded column (204) extends to the inner top of the notch and is fixedly connected to the input end of the one-way ratchet mechanism. The output end of the one-way ratchet mechanism is fixedly connected to the input end of the gearbox (3011). An output shaft (3012) is fixedly provided at the output end of the gearbox (3011). A connecting plate is fixedly provided on the side of the mounting frame (201). A rotating shaft (3013) is rotatably provided on the lower surface of the connecting plate. A drive wheel (3014) is fixedly provided at the bottom end of the output shaft (3012). A driven wheel (3015) is fixedly provided on the surface of the rotating shaft (3013). A transmission belt (3016) is sleeved on the surfaces of the drive wheel (3014) and the driven wheel (3015).

9. The integral molding mold for a rubber sealing ring according to claim 8, characterized in that, The bottom end of the rotating shaft (3013) is fixedly provided with a rotating disk (3017), and a connecting rod (3018) is rotatably provided on the lower surface of the rotating disk (3017). The other end of the connecting rod (3018) is rotatably connected to the end of the rack (308). The lower surface of the rotating disk (3017) is fixedly provided with a first connecting shaft, and a limiting disk is fixedly provided at the bottom end of the first connecting shaft. The end of the rack (308) is fixedly provided with a rotating frame, and the inner wall of the rotating frame is fixedly provided with a second connecting shaft. Both ends of the connecting rod (3018) are provided with rotating holes that are rotatably connected to the surfaces of the first connecting shaft and the second connecting shaft, respectively.

10. A process for integrally molding a rubber sealing ring, applied to the integral molding mold for the rubber sealing ring according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Pre-treatment of the skeleton: The metal skeleton is placed in an ultrasonic cleaning tank and cleaned at 60-80℃ for 10-15 minutes to remove surface oil; then acid pickling is performed to remove the oxide layer; subsequently, phosphating is performed to form a uniform phosphating film on the surface of the skeleton. S2. Glue coating of the skeleton: Apply adhesive to the pretreated skeleton in a centrifugal glue coater. The glue coating thickness is controlled at 10-20μm. Do not dry or pre-cure after gluing. S3. Mold loading and sealing injection: The glued skeleton is placed into the molding cavity of the mold body (100). After the mold is closed, the mixed rubber material is injected into the mold cavity through the injection port. Vacuum injection is used to avoid air bubbles from entering. S4. Heating: Activate the electric heating rod (103) to heat the rubber and make it bond firmly to the skeleton. S5. Cooling: Inject cooling water into the cooling chamber (104) to cool and set the rubber ring. S6. Open the mold, start the drive motor (203) to reverse, and drive the upper mold (102) and lower mold (101) to automatically separate.

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