Connecting sleeve casting equipment and process

Abstract

The invention relates to the technical field of casting equipment, in particular to connecting sleeve casting equipment and a process, the connecting sleeve casting equipment comprises a fixed mold and a movable mold, supporting plates are fixedly mounted on the left side and the right side of the lower end of the fixed mold, each of the fixed mold and the movable mold comprises an outer shell and an inner shell, and a water cavity is formed between the outer shell and the inner shell; metal liquid is injected into the movable mold and the fixed mold through a combined sprue gate, water is injected into water cavities in the movable mold and the fixed mold through an external water pipe and a water inlet pipe, and the injected water is discharged through the water outlet pipe and a water discharging pipe when the water level exceeds the water outlet pipe, so that the cooling time of a connecting sleeve is shortened; the shaft rod drives the cam and the rotating wheel to rotate, and the ejector rod is pushed upwards through the compression spring, so that the push plate is driven to move upwards, the connecting sleeve is separated from the inner wall of the fixed mold, the connecting sleeve is conveniently taken out, the cooling time of the connecting sleeve is shortened, the connecting sleeve is conveniently taken out, and the casting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of casting equipment, in particular to a connecting sleeve casting equipment and process. Background Art

[0002] Casting is a kind of metal heat processing technology that humans mastered relatively early. Casting is a method of pouring liquid metal into a casting cavity that is adapted to the shape of the part, and then cooling and solidifying it to obtain a part or blank. The cast material is mostly a metal that was originally solid but heated to a liquid state, and the material of the mold can be sand, metal or even ceramic. The methods used will vary depending on different requirements.

[0003] When the connecting sleeve is produced by a traditional casting mold, since the connecting sleeve has an open cavity inside and a slider needs to be set on the movable mold assembly, the feed port for introducing the metal raw material for forming the connecting sleeve will be set on the outer wall of the connecting sleeve, and an ejector rod for ejecting the connecting sleeve out of the mold after the connecting sleeve is formed will be set at the outer wall of the connecting sleeve.

[0004] However, the traditional casting mold has a long cooling time, and it is inconvenient to quickly remove the connecting sleeve from the mold after it is formed, resulting in low production efficiency. Therefore, the present invention proposes a connecting sleeve casting device and process for solving the above problems. Summary of the invention

[0005] The object of the present invention is to provide a connecting sleeve casting device and process to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a connecting sleeve casting device, comprising: a fixed mold and a movable mold, wherein support plates are fixedly installed on both the left and right sides of the lower end of the fixed mold, the fixed mold and the movable mold each comprise an outer shell and an inner shell, a water cavity is provided between the outer shell and the inner shell, and a plurality of heat sinks are evenly fixedly installed on the outer wall of the inner shell, and a pouring port is provided at one end of the fixed mold and the movable mold;

[0007] A push plate groove is provided at the inner end of the fixed mold, and sink grooves are provided on both the left and right sides of the push plate groove, and a circular hole 1 is provided at the lower end of the sink groove. A circular hole 2 is provided on both the left and right sides of the bottom end of the fixed mold, and the circular hole 1 and the circular hole 2 have the same size and center, and a sealing sleeve 1 is fixedly installed in the circular hole 1, and a sealing sleeve 2 is fixedly installed in the circular hole 2;

[0008] A driving component is fixedly installed on the upper end of the movable mold, and a push rod is installed on the lower end of the fixed mold through a pushing component. The upper end of the push rod passes through circular holes one and two and enters the sink groove, and a push plate is fixedly installed on the upper end of the push rod, and a sealing ring is fixedly installed on the lower end of the push plate.

[0009] Preferably, a water inlet pipe is fixedly installed on the lower side of one end of the fixed mold and the movable mold, and a water outlet pipe is fixedly installed on the upper side of the other end, and the inner ends of the water inlet pipe and the water outlet pipe are connected to the water cavity.

[0010] Preferably, the driving component includes a support column, which is L-shaped, with a base plate installed at the lower end of the support column, and the upper end of the support column is located above the movable mold. An electric push rod is fixedly installed at the upper end of the support column, and the output end of the electric push rod passes through the upper end side wall of the support column and is fixedly installed with a connecting plate, and the connecting plate is fixedly installed on the upper end of the movable mold by bolts.

[0011] Preferably, the sealing ring is fixedly sleeved on the upper outer wall of the push rod, and the push plate and the push plate groove are both arc-shaped. When the push plate is located in the push plate groove, the upper end of the push plate is flush with the upper end of the push plate groove, and the sealing ring is located in the sink groove, and the lower end of the sealing ring contacts the lower end side wall of the sink groove.

[0012] Preferably, the pushing component includes a motor, a shaft, a bar block and a guide sleeve, the motor is fixedly mounted on the outer wall of one of the support plates, the shaft is located at the lower end of the fixed mold, and one end of the shaft is fixedly connected to the output end of the motor through a coupling.

[0013] Preferably, a plurality of rotating sleeves are evenly rotatably sleeved on the outer wall of the shaft rod, a second fixed rod is fixedly mounted on the upper end of the rotating sleeve, the upper end of the second fixed rod is fixedly mounted on the lower end of the fixed mold, and a cam is fixedly mounted on the outer wall of the shaft rod.

[0014] Preferably, the guide sleeve is slidably sleeved on the outer wall of the push rod, a fixing rod 1 is fixedly installed on the outer wall of one end of the guide sleeve, the fixing rod 1 is fixedly installed on the lower end side wall of the fixed mold, the strip block is fixedly installed on the lower end side wall of the push rod, the front end side of the outer wall of the strip block is symmetrically rotatably connected to two wheels, and the outer wall of the wheel and the outer wall of the cam are rollingly connected.

[0015] Preferably, a spring is sleeved at the lower end of the push rod, one end of the spring is fixed to the lower end of the guide sleeve, and the other end of the spring is fixed to the outer wall of the strip block. When the spring is in a balanced state, the lower end of the sealing ring contacts the bottom end of the sink.

[0016] A connection sleeve casting process specifically comprises the following steps:

[0017] S1. First, start the electric push rod to install the movable mold on the upper end of the fixed mold. The joints of the movable mold and the fixed mold fit tightly. At the same time, the pouring gate combination on the movable mold and the fixed mold is circular.

[0018] S2, then, the metal liquid is injected into the movable mold and the fixed mold through the combined pouring port, and waits for cooling and forming;

[0019] S3. Then, lift the moving die upward through the electric push rod and separate it from the fixed die, exposing the formed connecting sleeve.

[0020] S4. Finally, start the motor to drive the shaft rod to rotate. The shaft rod drives the cam and the runner to rotate, and pushes the ejector rod upward through the compression spring, thereby driving the push plate to move upward and separating the connecting sleeve from the inner wall of the fixed die, facilitating the removal of the connecting sleeve.

[0021] Preferably, the water inlet pipes on the moving die and the fixed die are connected to the external water pipes, and the water outlet pipes on the moving die and the fixed die are both connected to the drain pipes. When cooling the connecting sleeve, inject water into the water chambers inside the moving die and the fixed die through the external water pipes and the water inlet pipes. When the injected water level exceeds the water outlet pipe, it is discharged through the water outlet pipe and the drain pipe, so that there is always flowing cooling water in the moving die and the fixed die, shortening the cooling time of the connecting sleeve.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] In the present invention, the molten metal is injected into the moving die and the fixed die through the combined pouring gate. The water inlet pipes on the moving die and the fixed die are connected to the external water pipes, and the water outlet pipes on the moving die and the fixed die are both connected to the drain pipes. Water is injected into the water chambers inside the moving die and the fixed die through the external water pipes and the water inlet pipes. When the injected water level exceeds the water outlet pipe, it is discharged through the water outlet pipe and the drain pipe, shortening the cooling time of the connecting sleeve. By starting the motor to drive the shaft rod to rotate, the shaft rod drives the cam and the runner to rotate, and pushes the ejector rod upward through the compression spring, thereby driving the push plate to move upward and separating the connecting sleeve from the inner wall of the fixed die, facilitating the removal of the connecting sleeve. The cooling time of the connecting sleeve is shortened and it is convenient to remove the connecting sleeve, improving the casting efficiency. Brief Description of the Drawings

[0024] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a rear view schematic diagram of the overall structure of the present invention;

[0026] Figure 3 It is a bottom view schematic diagram of the fixed die and the moving die of the present invention;

[0027] Figure 4 It is an unfolded schematic diagram of the outer shell and the inner shell of the present invention;

[0028] Figure 5 It is a schematic diagram of the lower end structure of the fixed die of the present invention;

[0029] Figure 6 It is a schematic diagram of the inner end structure of the fixed die of the present invention;

[0030] Figure 7 It is a schematic diagram of the structure of the pushing component of the present invention.

[0031] In the figure: 1, fixed mold; 2, movable mold; 3, support plate; 4, push plate groove; 5, counterbore; 6, round hole one; 7, sealing sleeve one; 8, round hole two; 9, sealing sleeve two; 10, ejector rod; 11, guide sleeve; 12, fixed rod one; 13, strip-shaped block; 14, runner; 15, shaft rod; 16, rotating sleeve; 17, fixed rod two; 18, cam; 19, spring; 20, sealing ring; 21, push plate; 22, bottom plate; 23, support column; 24, electric push rod; 25, connecting plate; 26, side plate; 27, fixed sleeve; 28, connecting groove; 29, motor; 101, outer shell; 102, inner shell; 103, heat sink; 104, pouring port; 105, water inlet pipe; 106, water outlet pipe. Specific embodiments

[0032] In order to clearly and completely describe the objectives, technical solutions of the present invention, and make the advantages more clearly understood, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 7 , the present invention provides a technical solution: a connecting sleeve casting device, including: a fixed mold 1 and a movable mold 2. On both the left and right sides of the lower end of the fixed mold 1, support plates 3 are fixedly installed. The support plates 3 are L-shaped, the upper ends of the support plates 3 are fixed to the lower end of the fixed mold 1, and strip-shaped holes are opened at the lower ends of the support plates 3, facilitating fixation on the ground or on the workbench through bolts. Both the fixed mold 1 and the movable mold 2 include an outer shell 101 and an inner shell 102. The outer shell 101 is fixedly installed at the outer end of the inner shell 102. A water cavity is provided between the outer shell 101 and the inner shell 102, and a plurality of heat sinks 103 are evenly fixedly installed on the outer wall of the inner shell 102. The heat sinks 103 are located in the water cavity. Pouring ports 104 are provided at one end of both the fixed mold 1 and the movable mold 2. A water inlet pipe 105 is fixedly installed at the lower side of one end of the fixed mold 1 and the movable mold 2, and a water outlet pipe 106 is fixedly installed at the upper side of the other end. The inner ends of the water inlet pipe 105 and the water outlet pipe 106 are communicated with the water cavity. The water inlet pipe 105 is connected to an external water pipe to inject cooling water into the water cavity. The water outlet pipe 106 is connected to an external drain pipe to allow the cooling water to flow out after flowing through the water cavity in a circle. The water outlet pipe 106 and the water inlet pipe 105 are arranged diagonally to maximize the flow path of the cooling water in the water cavity.

[0035] A driving component is fixedly installed at the upper end of the movable mold 2. The driving component includes a support column 23, which is L-shaped. A bottom plate 22 is installed at the lower end of the support column 23. The upper end of the support column 23 is located above the movable mold 2, and an electric push rod 24 is fixedly installed at the upper end of the support column 23. The output end of the electric push rod 24 passes through the side wall of the upper end of the support column 23 and is fixedly installed with a connecting plate 25. The connecting plate 25 is fixedly installed at the upper end of the movable mold 2 through bolts. By starting the electric push rod 24, the movable mold 2 can be covered on the upper end of the fixed mold 1 or separated from the fixed mold 1.

[0036] A push plate groove 4 is opened at the inner end of the fixed mold 1. Sunk grooves 5 are opened on both the left and right sides of the push plate groove 4. A round hole one 6 is opened at the lower end of the sunk groove 5. Round holes two 8 are opened on both the left and right sides of the bottom end of the fixed mold 1. The round hole one 6 and the round hole two 8 are the same in size and center. The round hole one 6 is located directly above the round hole two 8. A sealing sleeve one 7 is fixedly installed in the round hole one 6. A sealing sleeve two 9 is fixedly installed in the round hole two 8. The lower end of the fixed mold 1 is installed with a ejector rod 10 through a pushing component. The upper end of the ejector rod 10 passes through the round hole one 6 and the round hole two 8 and then enters the sunk groove 5. The sealing sleeve one 7 and the sealing sleeve two 9 are made of rubber. The sealing sleeve one 7 and the sealing sleeve two 9 play a role in sealing between the ejector rod 10 and the round hole one 6 and the round hole two 8. And a push plate 21 is fixedly installed at the upper end of the ejector rod 10. A sealing ring 20 is fixedly installed at the lower end of the push plate 21. The sealing ring 20 is fixedly sleeved on the outer wall of the upper end of the ejector rod 10. Both the push plate 21 and the push plate groove 4 are arc-shaped. When the push plate 21 is located in the push plate groove 4, the upper end of the push plate 21 is flush with the upper end of the push plate groove 4, and the sealing ring 20 is located in the sunk groove 5. The lower end of the sealing ring 20 contacts the side wall of the lower end of the sunk groove 5.

[0037] The pushing component includes a motor 29, a shaft rod 15, a strip-shaped block 13 and a guide sleeve 11. The motor 29 is fixedly installed on the outer wall of one of the support plates 3. The shaft rod 15 is located at the lower end of the fixed mold 1. A cam 18 is fixedly installed on the outer wall of the shaft rod 15. A plurality of rotating sleeves 16 are evenly and rotatably sleeved on the outer wall of the shaft rod 15. The rotating sleeve 16 is a bearing. The inner wall of the rotating sleeve 16 is fixedly sleeved on the outer wall of the shaft rod 15. The upper end outer wall of the rotating sleeve 16 is fixedly installed with a fixed rod two 17. The upper end of the fixed rod two 17 is fixedly installed at the lower end of the fixed mold 1, thereby rotatably installing the shaft rod 15 at the lower end of the fixed mold 1. One end of the shaft rod 15 is fixedly connected to the output end of the motor 29 through a coupling. When the motor 29 is started, it can drive the shaft rod 15 to rotate, thereby driving the cam 18 to rotate.

[0038] The guide sleeve 11 is slidably sleeved on the outer wall of the ejector rod 10. One end of the outer wall of the guide sleeve 11 is fixedly installed with a first fixed rod 12, and the first fixed rod 12 is fixedly installed on the lower side wall of the fixed mold 1. When the ejector rod 10 moves, it guides the ejector rod 10. A strip-shaped block 13 is fixedly installed on the lower side wall of the ejector rod 10. Two rotating wheels 14 are symmetrically and rotatably connected to the front side of the outer wall of the strip-shaped block 13. The outer wall of the rotating wheel 14 is in rolling connection with the outer wall of the cam 18. When the motor 29 drives the cam 18 to rotate, the cam 18 will rotate on the outer wall of the rotating wheel 14 and push the rotating wheel 14 and the ejector rod 10.

[0039] A spring 19 is sleeved on the lower end of the ejector rod 10. One end of the spring 19 is fixed to the lower end of the guide sleeve 11, and the other end of the spring 19 is fixed to the outer wall of the strip-shaped block 13. When the spring 19 is in a balanced state, the shorter end of the cam 18 contacts the rotating wheel 14, and at the same time, the lower end of the sealing ring 20 abuts against the bottom end of the sinking groove 5 to seal the sinking groove 5 and the first round hole 6.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, this embodiment further includes: a side plate 26, the side plate 26 is L-shaped. One end of the side plate 26 is fixedly installed with a connecting groove 28, and the other end is fixedly installed with a fixing sleeve 27. The fixing sleeve 27 penetrates the side wall of the side plate 26. The connecting groove 28 is U-shaped. The connecting groove 28 is sleeved on the lower outer wall of the support column 23 and fixed by bolts. At this time, the fixing sleeve 27 is located directly outside the pouring port 104.

[0042] During pouring, the pouring pipe is passed through the fixing sleeve 27 and then inserted into the pouring port 104 to play a role in fixing the pouring pipe.

[0043] Embodiment 3

[0044] On the basis of Embodiment 1, the present invention provides a casting process for a connecting sleeve, which specifically includes the following steps:

[0045] First, start the electric push rod 24 to install the moving mold 2 on the upper end of the fixed mold 1. The connection between the moving mold 2 and the fixed mold 1 is closely fitted. At the same time, the pouring ports 104 on the moving mold 2 and the fixed mold 1 are combined into a circle;

[0046] Next, pour the molten metal into the moving mold 2 and the fixed mold 1 through the combined pouring port 104. The water inlet pipes 105 on the moving mold 2 and the fixed mold 1 are connected to an external water pipe, and the water outlet pipes 106 on the moving mold 2 and the fixed mold 1 are both connected to a drain pipe. When cooling the connecting sleeve, water is injected into the water cavities inside the moving mold 2 and the fixed mold 1 through the external water pipe and the water inlet pipe 105. When the injected water level exceeds the water outlet pipe 106, it is discharged through the water outlet pipe 106 and the drain pipe, so that there is always flowing cooling water in the moving mold 2 and the fixed mold 1, shortening the cooling time of the connecting sleeve;

[0047] Then, the movable die 2 is lifted by the electric push rod 24 and separated from the fixed die 1, exposing the formed connecting sleeve;

[0048] Finally, the motor 29 is started to drive the shaft rod 15 to rotate. The shaft rod 15 drives the cam 18 and the runner 14 to rotate, and the ejector rod 10 is pushed upward by the compression spring 19, so as to drive the push plate 21 to move upward, separating the connecting sleeve from the inner wall of the fixed die 1 and facilitating the removal of the connecting sleeve.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connecting sleeve casting device, comprising: A fixed mold (1) and a movable mold (2), characterized in that: on both the left and right sides of the lower end of the fixed mold (1), support plates (3) are fixedly installed. Both the fixed mold (1) and the movable mold (2) include an outer shell (101) and an inner shell (102). A water chamber is provided between the outer shell (101) and the inner shell (102), and a number of radiating fins (103) are evenly and fixedly installed on the outer wall of the inner shell (102). A pouring port (104) is provided at one end of both the fixed mold (1) and the movable mold (2). A push plate groove (4) is opened at the inner end of the fixed mold (1). Sunk grooves (5) are opened on both the left and right sides of the push plate groove (4). A round hole one (6) is opened at the lower end of the sunk groove (5). Round hole two (8) is opened on both the left and right sides of the bottom end of the fixed mold (1). The round hole one (6) and the round hole two (8) are the same in size and center. A sealing sleeve one (7) is fixedly installed in the round hole one (6), and a sealing sleeve two (9) is fixedly installed in the round hole two (8). A driving component is fixedly installed at the upper end of the movable mold (2). A ejector rod (10) is installed at the lower end of the fixed mold (1) through a pushing component. The upper end of the ejector rod (10) passes through the round hole one (6) and the round hole two (8) and then enters the sunk groove (5). A push plate (21) is fixedly installed at the upper end of the ejector rod (10), and a sealing ring (20) is fixedly installed at the lower end of the push plate (21).

2. The casting equipment for a connecting sleeve according to claim 1, characterized in that: An inlet pipe (105) is fixedly installed on the lower side of one end of the fixed mold (1) and the movable mold (2), and an outlet pipe (106) is fixedly installed on the upper side of the other end. The inner ends of the inlet pipe (105) and the outlet pipe (106) are communicated with the water chamber.

3. A connecting sleeve casting device according to claim 1, characterized in that: The driving component includes a support column (23). The support column (23) is in an L shape. A bottom plate (22) is installed at the lower end of the support column (23). The upper end of the support column (23) is located above the movable mold (2), and an electric push rod (24) is fixedly installed at the upper end of the support column (23). The output end of the electric push rod (24) passes through the side wall of the upper end of the support column (23) and a connecting plate (25) is fixedly installed. The connecting plate (25) is fixedly installed on the upper end of the movable mold (2) through bolts.

4. The casting equipment for a connecting sleeve according to claim 1, characterized in that: The sealing ring (20) is fixedly sleeved on the outer wall of the upper end of the ejector rod (10). Both the push plate (21) and the push plate groove (4) are arc-shaped. When the push plate (21) is located in the push plate groove (4), the upper end of the push plate (21) is flush with the upper end of the push plate groove (4), and the sealing ring (20) is located in the sunk groove (5), and the lower end of the sealing ring (20) contacts the side wall of the lower end of the sunk groove (5).

5. The casting equipment for a connecting sleeve according to claim 1, characterized in that: The pushing component includes a motor (29), a shaft rod (15), a strip-shaped block (13) and a guide sleeve (11). The motor (29) is fixedly installed on the outer wall of one of the support plates (3). The shaft rod (15) is located at the lower end of the fixed mold (1), and one end of the shaft rod (15) is fixedly connected to the output end of the motor (29) through a coupling.

6. The casting equipment for a connecting sleeve according to claim 5, characterized in that: A number of rotating sleeves (16) are evenly and rotatably sleeved on the outer wall of the shaft rod (15). A second fixed rod (17) is fixedly installed at the upper end of the rotating sleeve (16). The upper end of the second fixed rod (17) is fixedly installed at the lower end of the fixed mold (1). A cam (18) is fixedly installed on the outer wall of the shaft rod (15).

7. The casting equipment for a connecting sleeve according to claim 6, characterized in that: The guide sleeve (11) is slidably sleeved on the outer wall of the ejector rod (10). A first fixed rod (12) is fixedly installed on the outer wall of one end of the guide sleeve (11). The first fixed rod (12) is fixedly installed on the lower side wall of the fixed mold (1). A strip-shaped block (13) is fixedly installed on the lower side wall of the ejector rod (10). Two rotating wheels (14) are symmetrically and rotatably connected to the front side of the outer wall of the strip-shaped block (13). The outer wall of the rotating wheel (14) is in rolling connection with the outer wall of the cam (18).

8. The casting equipment for a connecting sleeve according to claim 7, characterized in that: A spring (19) is sleeved on the lower end of the ejector rod (10). One end of the spring (19) is fixed at the lower end of the guide sleeve (11). The other end of the spring (19) is fixed on the outer wall of the strip-shaped block (13). When the spring (19) is in a balanced state, the lower end of the sealing ring (20) abuts against the bottom end of the sinking groove (5).

9. A casting process for a connecting sleeve, characterized in that: Specifically, it includes the following steps: S1. First, start the electric push rod (24) to install the movable mold (2) on the upper end of the fixed mold (1). The connection between the movable mold (2) and the fixed mold (1) is closely fitted. At the same time, the pouring ports (104) on the movable mold (2) and the fixed mold (1) are combined into a circular shape; S2. Then, pour the molten metal into the movable mold (2) and the fixed mold (1) through the combined pouring port and wait for it to cool and solidify; S3. Then, lift the movable mold (2) by the electric push rod (24) and separate it from the fixed mold (1) to expose the formed connecting sleeve; S4. Finally, start the motor (29) to drive the shaft rod (15) to rotate. The shaft rod (15) drives the cam (18) and the rotating wheel (14) to rotate, and pushes the ejector rod (10) upward by compressing the spring (19), thereby driving the push plate (21) to move upward to separate the connecting sleeve from the inner wall of the fixed mold (1) for easy removal of the connecting sleeve.

10. A casting process for a connecting sleeve according to claim 9, characterized in that: The water inlet pipes (105) on the movable mold (2) and the fixed mold (1) are connected to the external water pipes. The water outlet pipes (106) on the movable mold (2) and the fixed mold (1) are both connected to drain pipes. When cooling the connecting sleeve, water is injected into the water cavities inside the movable mold (2) and the fixed mold (1) through the external water pipes and the water inlet pipes (105). When the injected water level exceeds the water outlet pipes (106), it is discharged through the water outlet pipes (106) and the drain pipes, so that there is always flowing cooling water inside the movable mold (2) and the fixed mold (1) to shorten the cooling time of the connecting sleeve.

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