A molding die for preparing a sealing ring

Abstract

The present invention relates to a molding mold for preparing a sealing ring in the field of injection molds. Through a pair of mold plates arranged on the outsides of a left mold barrel and a right mold core and a spraying component arranged in the mold plate and capable of extending into an annular mold cavity, when spraying a release agent, a rotating mechanism drives the mold plate to rotate, so that a spray pipe performs a composite motion of lateral movement and circular motion, and sprays the release agent evenly onto the inner wall of the annular mold cavity. At the same time, the self-rotating left mold barrel and right mold core make the release agent on the inner wall of the annular mold cavity evenly spread on the inner wall of the annular mold cavity under the action of centrifugal force, thereby further improving the uniformity of the distribution of the release agent. In addition, when performing a demolding operation, the spray pipe performs synchronous rotation and extrusion on both sides of a sealing ring embryo in the annular mold cavity, thereby realizing rotational peeling of the sealing ring embryo, reducing adhesion and damage of the sealing ring embryo, and improving the demolding quality.

Description

Technical Field

[0001] The invention relates to a sealing ring mould, in particular to a forming mould for preparing a sealing ring applied in the field of injection moulds. Background Art

[0002] The sealing ring is usually annular in design, and its circumferential outer wall and the inner wall of the central aperture are in close contact with the mold. This feature makes the sealing ring prone to adhesion during demolding after injection molding. In order to improve the demolding quality and ensure that the sealing ring can be demolded smoothly and maintain its integrity, two methods are usually used: one is to evenly apply a layer of release agent on the inner wall of the mold before injection molding to reduce the adhesion between the mold and the sealing ring; the other is to equip a special ejection device to use mechanical force to eject the molded sealing ring from the mold, thereby effectively avoiding adhesion and improving production efficiency and product quality.

[0003] The existing Chinese patent with publication number CN117021483A discloses a high-precision engine ignition coil cylinder seal ring molding mold, including: a static mold; a dynamic mold, which can move toward or away from the static mold; a first mold and a second mold, which can be detachably installed in the first mounting groove and the second mounting groove on the static mold and the dynamic mold respectively. When the dynamic mold and the static mold are closed together, the colloid is injected into the first mold and the second mold through the injection pipe, and cooled and molded in the first mold and the second mold to form a seal ring. When demolding is required, the dynamic mold is moved away from the static mold. When the dynamic mold moves in the direction away from the static mold, the first push rod will automatically extend from the second mold, and the second push rod will automatically extend from the first mold, which can effectively eject the seal ring retained in the first mold or the second mold, thereby achieving the effect of rapid demolding.

[0004] In the above patent application, a first push rod and a second push rod are used to eject the sealing ring, thereby improving the demolding speed. However, the contact area between the first push rod and the second push rod and the sealing ring is limited. During ejection, other parts of the sealing ring away from the first push rod and the second push rod are still adhered to the inner wall of the mold during the ejection process, causing the sealing ring to undergo significant deformation or even damage during the ejection process. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the ejection device of the existing sealing ring mold during demoulding easily causes the sealing ring to be subjected to uneven force, resulting in deformation or even damage.

[0006] In order to solve the above problems, the present invention provides a molding die for preparing a sealing ring, comprising a mold body; the mold body comprises a left mold barrel and a right mold core enclosing an annular mold cavity, and an injection hole is opened on the circumferential side wall of the left mold barrel; a pair of mold plates fixed to the outer walls of the left mold barrel and the right mold core are fixedly connected to the outer sides of the left mold barrel and the right mold core, respectively, a mold frame is rotatably connected to the outer side of the mold plate, a rotating mechanism driving the mold plate to rotate is installed on the mold frame, and a lateral mold clamping mechanism driving the pair of mold frames to move synchronously to realize the clamping and demolding of the left mold barrel and the right mold core is connected to the outer side of the mold frame;

[0007] A pair of mold discs are each nested with a plurality of spraying components equidistantly distributed in a circle, the spraying components comprising an extrusion cavity provided in the mold disc, a spraying tube slidably connected to the inner wall of the extrusion cavity and extendable into the annular mold cavity being nested in the extrusion cavity; the spraying tube is provided with a central cavity connected with the extrusion cavity, and a spraying hole is provided on the circumferential side wall close to the extended end thereof; a limit spring nested in the extrusion cavity is abutted against the outer side of the spraying tube, and the outer end of the extrusion cavity is connected with an external demoulding agent supply mechanism, when the external demoulding agent supply mechanism injects the demoulding agent into the extrusion cavity, the demoulding agent liquid squeezes the spraying tube, so that the spraying tube extends from the extrusion cavity into the annular mold cavity, and the demoulding agent is sprayed out from the spraying hole.

[0008] In the above-mentioned molding die for preparing the sealing ring, a rotatable mold plate and a spray tube that can extend into the mold cavity and spray a release agent are used to evenly spray before injection molding and perform rotational peeling during demoulding, thereby improving the demoulding quality of the sealing ring.

[0009] As a further improvement of the present application, a first electromagnetic flow valve is installed at the position where the release agent supply mechanism is connected to the opening at the outer end of the extrusion chamber, an inner multi-way pipe is connected to the outside of the first electromagnetic flow valve, the inlet end of the inner multi-way pipe is connected to the discharge pipe of an outer three-way pipe, the feed pipes on both sides of the outer three-way pipe are respectively connected to an air inlet pipe and a liquid inlet pipe, the air inlet pipe is connected to an external high-pressure air pump, the liquid inlet pipe is connected to the release agent supply mechanism, and a second electromagnetic flow valve is installed on both the air inlet pipe and the liquid inlet pipe.

[0010] As a further improvement of the present application, the left mold barrel is a cylindrical structure with a columnar cavity at the center, and when installed, the opening of the columnar cavity faces right; the right mold core is a horizontally arranged cylindrical structure, and when installed, it is arranged horizontally.

[0011] As a further improvement of the present application, the rotating mechanism includes a pair of synchronous motors fixedly mounted on the mold frames on both sides, which are connected to the mold plate through a transmission gear set. The transmission gear set includes a gear ring fixedly connected to the outer wall of the mold plate and a driving gear meshing with the gear ring and fixedly connected to the output shaft of the synchronous motor.

[0012] As a further improvement of the present application, the lateral mold clamping mechanism includes a support frame, to which are fixedly connected a plurality of guide rods arranged in parallel and passing through a pair of mold frames, and a connecting frame is fixedly connected to the outer sides of the pair of mold frames, and the connecting frame is connected to a synchronous telescopic cylinder fixed on the support frame.

[0013] As a further improvement of the present application, there are multiple spray holes which are distributed in an inclined radial pattern on the circumferential side wall of the spray pipe, and the spray pipes of the two groups of spray assemblies are staggered.

[0014] As a further improvement of the present application, the extrusion chamber is a horizontal cylindrical chamber, the injection tube is a cylindrical assembly structure with a T-shaped cross-section, a connecting hole connected to the extrusion chamber is opened on the left mold cylinder, and a limit cylinder mounted on the outside of the limit spring is fixedly connected to the inner wall of the extrusion chamber facing the outer end of the injection tube.

[0015] As a further improvement of the present application, the inner multi-way tube includes a plurality of discharge tubes connected to the extrusion chamber and a feed tube connected to each discharge tube, and the feed tube of the inner multi-way tube is connected to the discharge tube of the outer three-way tube through a rotary joint.

[0016] In summary, the present invention uses a pair of mold plates arranged on the outsides of the left mold barrel and the right mold core, and a spray assembly arranged in the mold plate and capable of extending into the annular mold cavity. When spraying the release agent, the rotating mechanism drives the mold plate to rotate, and the release agent supply mechanism drives the spraying pipe of the spray assembly to extend into the annular mold cavity, so that the spraying pipe performs a composite motion of lateral movement and circular motion, and the release agent is evenly sprayed onto the inner wall of the annular mold cavity. At the same time, the rotating left mold barrel and the right mold core cause the release agent on the inner wall of the annular mold cavity to be evenly spread on the inner wall of the annular mold cavity under the action of centrifugal force, further The uniformity of the distribution of the demoulding agent is improved; in addition, during the demoulding operation, the injection pipe synchronously rotates and extrudes the sealing ring blank in the annular mold cavity on both sides to realize the rotational peeling of the sealing ring blank, so that the sealing ring blank is slowly rotated and separated from the inner wall of the left mold barrel and the outer wall of the right mold core, thereby reducing the adhesion and damage of the sealing ring blank and improving the demoulding quality. At the same time, the demoulding agent sprayed during demoulding can better penetrate into the gap between the inner walls of the sealing ring blank and the left mold barrel as the left mold barrel rotates and the sealing ring blank is rotated and separated, thereby further improving the demoulding efficiency and demoulding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0018] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 4 It is a schematic diagram of the assembly of the left mold barrel and the mold frame in this application;

[0021] Figure 5 for Figure 4 A schematic cross-sectional structure diagram of ;

[0022] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 7 This is a schematic diagram of the assembly of the right mold core and mold frame in this application;

[0024] Figure 8 It is a schematic diagram of the state where the injection pipe in the present application extends into the annular mold cavity;

[0025] Fig. 9 It is a schematic diagram of the spraying status of two groups of spraying components in this application;

[0026] Fig.10 It is a schematic diagram of the state during demoulding in this application.

[0027] Description of the numbers in the figure:

[0028] 1. Left mold barrel; 2. Right mold core; 3. Annular mold cavity; 4. Mold plate; 5. Mold frame; 6. Guide rod; 7. Support frame; 8. Synchronous telescopic cylinder; 9. Transmission gear set; 10. Synchronous motor; 11. Spraying assembly; 12. Extrusion cavity; 13. Injection pipe; 1301, central cavity; 1302, spray hole; 14. Limit spring; 15. Limit cylinder; 16. Internal multi-way pipe; 17. First electromagnetic flow valve; 18. Rotary joint; 19. External three-way pipe; 20. Air inlet pipe; 21. Liquid inlet pipe; 22. Second electromagnetic flow valve; 23. Connecting frame. DETAILED DESCRIPTION

[0029] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-10 A molding die for preparing a sealing ring is shown, comprising a die body; the die body comprises a left die barrel 1 and a right die core 2 which enclose an annular die cavity 3, and an injection hole is opened on the circumferential side wall of the left die barrel 1; a pair of die plates 4 which are respectively fixed to the outer walls of the left die barrel 1 and the right die core 2 are fixedly connected to the outer sides of the left die barrel 1 and the right die core 2, a die frame 5 is rotatably connected to the outer side of the die plate 4, a rotating mechanism driving the die plate 4 to rotate is installed on the die frame 5, and a lateral mold clamping mechanism which drives the pair of mold frames 5 to move synchronously to realize the mold clamping and demolding of the left die barrel 1 and the right die core 2 is connected to the outer side of the die frame 5;

[0032] A pair of mold discs 4 are each nested with a plurality of spraying components 11 equidistantly distributed around the circumference, the spraying components 11 comprising an extrusion cavity 12 provided in the mold disc 4, a spraying tube 13 slidably connected to the inner wall of the extrusion cavity 12 and extendable into the annular mold cavity 3 being nested in the extrusion cavity 12; the spraying tube 13 is provided with a central cavity 1301 connected to the extrusion cavity 12, and a spray hole 1302 is provided on the circumferential side wall close to the extended end thereof; a limit spring 14 nested in the extrusion cavity 12 abuts against the outer side of the spraying tube 13, the outer end of the extrusion cavity 12 is connected to an external release agent supply mechanism, when the external release agent supply mechanism injects the release agent into the extrusion cavity 12, the release agent liquid squeezes the spraying tube 13, so that the spraying tube 13 extends from the extrusion cavity 12 into the annular mold cavity 3, and the release agent is sprayed out from the spray hole 1302.

[0033] For details, please refer to Figure 1 , Figure 8 , Fig. 9 and Fig.10 , when preparing the sealing ring, the following steps are included:

[0034] Step 1: First, start the lateral mold clamping mechanism, which pushes the left mold barrel 1 and the right mold core 2 to move toward each other until the distance between the left end surface of the right mold core 2 and the inner wall of the left mold barrel 1 reaches the set distance (the left mold barrel 1 and the right mold core 2 are almost closed but there is a gap to avoid wear when the left mold barrel 1 and the right mold core 2 rotate in opposite directions);

[0035] Step 2, start the rotating mechanism and the release agent supply mechanism, the rotating mechanism drives a pair of mold plates 4 to make reverse circular rotation, the release agent supply mechanism injects the release agent into the extrusion cavity 12, the release agent squeezes the injection tube 13 to make it extend into the annular mold cavity 3 and spray synchronously, during the spraying process, the injection tubes 13 of the two groups of spraying assemblies 11 make lateral movement and circular rotation at the same time, so as to achieve uniform spraying of the release agent, and the left mold barrel 1 and the right mold core 2 make circular rotation during the spraying process, so that the release agent is evenly spread on the inner wall of the left mold barrel 1 and the outer wall of the right mold core 2, further improving the uniformity of spraying of the release agent, after the spraying is completed, close the release agent supply mechanism and the rotating mechanism, under the action of the limit spring 14, the injection tube 13 returns from the annular mold cavity 3 to the extrusion cavity 12;

[0036] Step 3: After the release agent is sprayed, the horizontal mold clamping mechanism is started again to splice the left mold barrel 1 and the right mold core 2 together, and then the molten material is injected into the annular mold cavity 3 through the injection hole on the circumferential side wall of the left mold barrel 1. After the injection, the pressure is maintained, and then the temperature is lowered and cooled to obtain the sealing ring embryo;

[0037] It should be noted that the injection hole and the injection device are both prior art and are not shown in the drawings;

[0038] Step 4, demoulding operation is carried out. First, the lateral mold clamping mechanism is started to drive the left mold barrel 1 and the right mold core 2 to move away synchronously. At the same time, the demoulding agent supply mechanism and the rotating mechanism are started. The injection pipes 13 located in the mold plates 4 on both sides are squeezed by the demoulding agent and gradually extend into the annular mold cavity 3. The injection pipes 13 on both sides rotate and extrude the sealing ring embryo and spray out the demoulding agent; during the rotation and extrusion process of the injection pipes 13, the injection pipes 13 gradually rotate and peel off the sealing ring embryo, so that the sealing ring embryo is slowly separated from the inner wall of the left mold barrel 1 and the outer wall of the right mold core 2. At the same time, the rotation of the left mold barrel 1 causes the demoulding agent sprayed into the annular mold cavity 3 to flow and penetrate into the gap between the sealing ring and the left mold barrel 1 along the inner wall of the left mold barrel 1 under the action of centrifugal force, thereby further improving the demoulding effect.

[0039] Compared with the traditional sealing ring mold, the present invention has a pair of mold plates 4 arranged on the outside of the left mold barrel 1 and the right mold core 2, and a spray assembly 11 arranged in the mold plate 4 and capable of extending into the annular mold cavity 3. When spraying the release agent, the rotating mechanism drives the mold plate 4 to rotate, and the release agent supply mechanism drives the spray pipe 13 of the spray assembly 11 to extend into the annular mold cavity 3, so that the spray pipe 13 performs a composite motion of lateral movement and circular motion, and evenly sprays the release agent onto the inner wall of the annular mold cavity 3. At the same time, the rotating left mold barrel 1 and the right mold core 2 cause the release agent on the inner wall of the annular mold cavity 3 to be evenly spread on the annular mold cavity 3 under the action of centrifugal force. On the inner wall of the mold cavity 3, the uniformity of the release agent distribution is further improved; in addition, when the demolding operation is performed, the injection pipe 13 synchronously rotates and extrudes the sealing ring embryo in the annular mold cavity 3 on both sides to realize the rotational peeling of the sealing ring embryo, so that the sealing ring embryo is slowly rotated and separated from the inner wall of the left mold cylinder 1 and the outer wall of the right mold core 2, thereby reducing the adhesion and damage of the sealing ring embryo and improving the demolding quality. At the same time, the release agent sprayed during demolding can better penetrate into the gap between the inner walls of the sealing ring embryo and the left mold cylinder 1 as the left mold cylinder 1 rotates and the sealing ring embryo is separated from the left mold cylinder 1, thereby further improving the demolding efficiency and demolding quality.

[0040] Please refer to the figure Figure 3 , Figure 4 and Figure 7 The left mold barrel 1 is a cylindrical structure with a columnar cavity at the center, and when installed, the columnar cavity opens to the right; the right mold core 2 is a horizontally arranged cylindrical structure, and when installed, it is arranged horizontally.

[0041] Specifically, the left mold cylinder 1 and the right mold core 2 are convenient for horizontal mold closing and demolding under the action of the lateral mold closing mechanism, and an annular mold cavity 3 is formed during mold closing, which is convenient for rapid demolding under the extrusion of the injection pipes 13 on both sides during demolding.

[0042] See also Figure 1 and Figure 3The rotating mechanism includes a pair of synchronous motors 10 fixedly mounted on the mold frames 5 on both sides. The synchronous motor 10 is connected to the mold plate 4 for transmission through a transmission gear set. The transmission gear set 9 includes a gear ring fixedly connected to the outer wall of the mold plate 4 and a driving gear meshing with the gear ring and fixedly connected to the output shaft of the synchronous motor 10.

[0043] Specifically, a pair of synchronous motors 10 drive a pair of mold plates 4 to rotate in opposite directions through a transmission gear set 9, so that each spray pipe 13 of the two spraying assemblies 11 can make opposite circular motions, thereby improving the uniformity of spraying.

[0044] See also Figure 1 The lateral mold clamping mechanism includes a support frame 7, on which a plurality of guide rods 6 arranged in parallel and penetrating a pair of mold frames 5 are fixedly connected, and a connecting frame 23 is fixedly connected to the outer sides of the pair of mold frames 5, and the connecting frame 23 is connected to a synchronous telescopic cylinder 8 fixed on the support frame 7.

[0045] Specifically, a pair of synchronous telescopic cylinders 8 drive a pair of mold frames 5 to move toward or away from each other through the connecting frame 23 to achieve mold closing and mold removing operations.

[0046] See also Figure 6 and Fig. 9 There are multiple spray holes 1302 which are radially distributed on the circumferential side wall of the spray pipe 13 in an inclined manner, and the spray pipes 13 of the two groups of spraying assemblies 11 are staggered.

[0047] Specifically, the spray holes 1302 on the spray tube 13 are inclined and radial, and two groups of staggered spray tubes 13 fully cover and spray the inner wall of the annular mold cavity 3 in a composite motion state of horizontal movement and circular rotation, thereby improving the uniformity of spraying. The two groups of staggered spray tubes 13 distributed on both sides of the sealing ring blank squeeze and clamp the two sides of the sealing ring blank during demolding, so that the left mold cylinder 1 and the right mold core 2 undergo relative lateral movement and circular motion with the sealing ring blank, thereby reducing adhesion and improving the demolding effect.

[0048] See also Figure 6 The extrusion cavity 12 is a horizontal columnar cavity, the injection pipe 13 is a cylindrical assembly structure with a T-shaped cross-section, a connecting hole connected to the extrusion cavity 12 is opened on the left mold cylinder 1, and a limit cylinder 15 sleeved on the outside of the limit spring 14 is fixedly connected to the inner wall of the extrusion cavity 12 facing the outer end of the injection pipe 13.

[0049] Specifically, it is convenient to protect the limit spring 14 and prevent the limit spring 14 from plastic deformation.

[0050] See also Figure 3 A first electromagnetic flow valve 17 is installed at a position where the release agent supply mechanism communicates with the outer end opening of the extrusion chamber 12 .

[0051] Specifically, the release agent filling flow rate is monitored through the first electromagnetic flow valve 17, thereby monitoring the lateral moving speed and injection speed of the injection pipe 13, thereby facilitating the control of the lateral moving speed and injection speed of the injection pipe 13.

[0052] Second implementation method:

[0053] Figure 3 , Figure 5 and Fig.10 A molding die for preparing a sealing ring is shown. Based on the first embodiment, the outer side of the first electromagnetic flow valve 17 is connected to an inner multi-way tube 16, the inlet end of the inner multi-way tube 16 is connected to the discharge pipe of an outer three-way tube 19, and the feed pipes on both sides of the outer three-way tube 19 are respectively connected to an air inlet pipe 20 and a liquid inlet pipe 21, the air inlet pipe 20 is connected to an external high-pressure air pump, the liquid inlet pipe 21 is connected to a release agent supply mechanism, and a second electromagnetic flow valve 22 is installed on both the air inlet pipe 20 and the liquid inlet pipe 21.

[0054] Specifically, when demolding is performed, the external high-pressure air pump and the second electromagnetic flow valve 22 installed on the air inlet pipe 20 are started, so that the high-pressure air is injected into the extrusion cavity 12 through the external three-way pipe 19 and the internal multi-way pipe 16, and the injection pipe 13 is pushed to extend and eject the air. When the injection pipe 13 rotates to peel off the sealing ring blank, the high-pressure airflow is used instead of the release agent. The high-pressure airflow quickly fills the gap between the left mold barrel 1 and the right mold core 2 and the sealing ring blank, thereby reducing the use of the release agent and improving the rotational peeling effect.

[0055] See also Figure 5 The inner multi-way tube 16 includes a plurality of discharge tubes connected to the extrusion chamber 12 and a feed tube connected to each discharge tube. The feed tube of the inner multi-way tube 16 is connected to the discharge tube of the outer three-way tube 19 through a rotary joint 18 .

[0056] Specifically, when the number of the spraying assemblies 11 in the mold plate 4 on one side is two, the inner multi-way pipe 16 is a three-way pipe; when the number of the spraying assemblies 11 in the mold plate 4 on one side is three, the inner multi-way pipe 16 is a four-way pipe, and so on.

[0057] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A molding die for preparing a sealing ring, characterized in that: The mold body comprises a left mold barrel (1) and a right mold core (2) which enclose an annular mold cavity (3), and an injection hole is opened on the circumferential side wall of the left mold barrel (1); the outer sides of the left mold barrel (1) and the right mold core (2) are fixedly connected with a pair of mold plates (4) which are respectively fixed to the outer walls of the two mold barrels, the outer sides of the mold plates (4) are rotatably connected with a mold frame (5), the mold frame (5) is equipped with a rotating mechanism for driving the mold plate (4) to rotate, and the outer sides of the mold frame (5) are connected with a lateral mold clamping mechanism for driving the pair of mold frames (5) to move synchronously to realize the clamping and demolding of the left mold barrel (1) and the right mold core (2); A plurality of spraying components (11) are nested in each of the pair of die plates (4) and are equidistantly distributed around the circumference. The spraying components (11) include an extrusion cavity (12) provided in the die plate (4), and a spraying tube (13) is nested in the extrusion cavity (12) and is slidably connected to the inner wall of the extrusion cavity (12) and can extend into the annular die cavity (3). The spraying tube (13) is provided with a central cavity (1301) connected to the extrusion cavity (12), and a spraying hole is provided on the circumferential side wall of the spraying tube (13) near the protruding end. (1302); the outer side of the injection tube (13) is in contact with a limit spring (14) embedded in the extrusion cavity (12); the outer end of the extrusion cavity (12) is connected to an external mold release agent supply mechanism; when the external mold release agent supply mechanism injects the mold release agent into the extrusion cavity (12), the mold release agent liquid squeezes the injection tube (13), so that the injection tube (13) extends from the extrusion cavity (12) into the annular mold cavity (3), and the mold release agent is sprayed out from the injection hole (1302); A first electromagnetic flow valve (17) is installed at a position where the release agent supply mechanism is connected to the outer opening of the extrusion chamber (12); the outer side of the first electromagnetic flow valve (17) is connected to an inner multi-way tube (16); the inlet end of the inner multi-way tube (16) is connected to a discharge pipe of an outer three-way tube (19); the feed pipes on both sides of the outer three-way tube (19) are respectively connected to an air inlet pipe (20) and a liquid inlet pipe (21); the air inlet pipe (20) is connected to an external high-pressure air pump; the liquid inlet pipe (21) is connected to the release agent supply mechanism; and a second electromagnetic flow valve (22) is installed on both the air inlet pipe (20) and the liquid inlet pipe (21); the inner multi-way tube (16) comprises a plurality of discharge pipes connected to the extrusion chamber (12) and a feed pipe connected to each of the discharge pipes; the feed pipe of the inner multi-way tube (16) is connected to the discharge pipe of the outer three-way tube (19) via a rotary joint (18).

2. A molding die for preparing a sealing ring according to claim 1, characterized in that: The left mold barrel (1) is a cylindrical structure with a columnar cavity at the center, and when installed, the columnar cavity opens to the right; the right mold core (2) is a horizontally arranged cylindrical structure, and when installed, it is arranged horizontally.

3. A molding die for preparing a sealing ring according to claim 1, characterized in that: The rotating mechanism comprises a pair of synchronous motors (10) fixedly mounted on the mold frames (5) on both sides, the synchronous motors (10) being connected to the mold plate (4) for transmission via a transmission gear set, the transmission gear set (9) comprising a gear ring fixedly connected to the outer wall of the mold plate (4) and a driving gear meshing with the gear ring and fixedly connected to the output shaft of the synchronous motor (10).

4. A molding die for preparing a sealing ring according to claim 1, characterized in that: The transverse mold clamping mechanism comprises a support frame (7), to which a plurality of guide rods (6) arranged in parallel and penetrating a pair of mold frames (5) are fixedly connected, and a connecting frame (23) is fixedly connected to the outer sides of the pair of mold frames (5), and the connecting frame (23) is connected to a synchronous telescopic cylinder (8) fixed to the support frame (7).

5. A molding die for preparing a sealing ring according to claim 1, characterized in that: The spray holes (1302) are multiple in number and are distributed in an inclined radial pattern on the circumferential side wall of the spray pipe (13), and the spray pipes (13) of the two groups of spraying assemblies (11) are distributed in a staggered manner.

6. A molding die for preparing a sealing ring according to claim 1, characterized in that: The extrusion chamber (12) is a horizontal columnar chamber, the injection tube (13) is a cylindrical assembly structure with a T-shaped cross section, a connecting hole connected to the extrusion chamber (12) is provided on the left mold cylinder (1), and a limiting cylinder (15) sleeved on the outside of the limiting spring (14) is fixedly connected to the inner wall of the extrusion chamber (12) on the side facing the outer end of the injection tube (13).

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