All-plastic shell injection molding device

Abstract

The utility model relates to the technical field of injection molding equipment, and discloses an all-plastic shell injection molding device which comprises a base, and a short groove is formed in the top end of the base. Through the arrangement of the moving rod, the first spring, the cylinder and the ejector rod, due to the fact that the screw rod is connected with the square block in a threaded and sleeved mode, when the screw rod rotates, the square block is driven to move leftwards along the interior of the short groove, and at the moment, the square block drives the moving rod to move through the first hinge block; next, a moving rod drives a circular pipe to move upwards through a second hinge block and a lifting rod, due to the fact that a lower die blocks a cylinder, the circular pipe is matched with the cylinder to compress a first spring, and when the lower die drives a circular groove to move to the position above the cylinder, the lower die relieves blocking on the cylinder; and at the moment, a cylinder is driven by a first spring to upwards push an ejector rod, and the ejector rod upwards ejects out the lamp shell in the lower mold, so that the injection-molded plastic shell can be automatically discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, and more specifically, to a full-plastic shell injection molding device. Background Art

[0002] Injection molding is a method for producing industrial products, typically using rubber and plastic injection molding. Injection molding can be further divided into compression molding and die casting. The device is the primary molding equipment used to mold thermoplastics or thermosetting materials into various shapes using plastic molding molds. Injection molding is achieved using an injection molding machine and molds.

[0003] When operators produce and process LED lamp housings, injection molding devices are often used to manufacture the lamp housings conveniently and efficiently. Although existing injection molding devices have basic injection molding functions, after the LED lamp housing is injection-molded, the LED lamp housing is often located inside the lower mold, and the operator needs to manually remove it. In order to ensure the light transmittance of the lamp housing, the surface of the lamp housing is often relatively smooth, which makes it difficult for the operator to cut the material, affecting production efficiency and adding a lot of complicated work to the operator. Therefore, it needs to be improved. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a full-plastic shell injection molding device, which has the advantage of automatically unloading the injection-molded plastic shell.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a full plastic shell injection molding device, comprising:

[0006] A base, wherein a short slot is formed on the top of the base, and a fixing frame is fixedly mounted on the top of the base;

[0007] A driving mechanism, the driving mechanism being arranged at the top end on the right side of the base;

[0008] A motion mechanism, the motion mechanism being arranged inside the short slot;

[0009] The cam is connected to the sliding panel also by means of a button, and the button is connected to the second end of the swing arm to form a round cam, and the button is connected to the second end of the swing arm to form a round cam.

[0010] As a preferred technical solution of the present invention, the driving mechanism includes:

[0011] A motor, wherein the left end of the motor is fixedly connected to the top end of the right side of the base, the other end of the motor output shaft is fixedly sleeved with a long shaft, and the outer surface of the long shaft is movably sleeved with the inner portion of the base;

[0012] The screw rod has its right end fixedly sleeved with the left end of the long shaft, its left end movably sleeved with the inside of the short groove, and its outer surface sleeved with the inner thread of the square block.

[0013] As a preferred technical solution of the present invention, a vertical plate is fixedly installed on the top of the base, a guide rail is fixedly installed on the outer surface of the vertical plate, and the outer surface of the guide rail is movably connected to the inner parts of the front and rear sides of the lower mold.

[0014] As a preferred technical solution of the present invention, a fixing frame is fixedly installed on the left side of the top end of the base, and a first cylinder is fixedly sleeved inside the fixing frame.

[0015] As an optimal technical solution of the present invention, a moving plate is fixedly installed on the right end of the first cylinder, connecting rods are fixedly installed on the front and rear ends of the right side of the moving plate, a movable plate is fixedly installed on the right end of the connecting rod, and the left side of the movable plate is fixedly connected to the right side of the lower mold.

[0016] As a preferred technical solution of the present invention, second cylinders are fixedly installed on both the front and rear sides of the top of the base, and a lifting plate is fixedly sleeved on the top of the outer surface of the second cylinder.

[0017] As an optimal technical solution of the present invention, a fixed box is fixedly installed on the top of the lifting plate, a feed pipe is fixedly sleeved inside the right side of the fixed box, and the interior of the bottom end of the fixed box is connected to the interior of the lifting plate.

[0018] As a preferred technical solution of the present invention, a lifting block is fixedly installed on the bottom end of the lifting plate, and the interior of the lifting block is connected to the interior of the lifting plate.

[0019] As a preferred technical solution of the present invention, an upper mold is fixedly installed on the bottom end of the lifting block, the interior of the upper mold is connected to the interior of the lifting block, and a positioning rod is fixedly installed on the outer surface of the lifting block.

[0020] As a preferred technical solution of the present invention, a cooling pipe is fixedly sleeved inside the lower mold, and a hose is fixedly sleeved on the right end of the cooling pipe.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The utility model is provided with a moving rod, a first spring, a cylinder and a push rod. Since the screw is threadedly sleeved with the square block, when the screw rotates, it will drive the square block to move to the left along the inside of the short groove. At this time, the square block will drive the moving rod to move through the first hinge block. Due to the limitation of the limit rod, the moving rod will then drive the round tube upward through the second hinge block and the lifting rod. Since the lower mold blocks the cylinder, the round tube will cooperate with the cylinder to compress the first spring. When the lower mold drives the circular groove to move above the cylinder, the lower mold will release the obstruction to the cylinder. At this time, the cylinder will push the push rod upward under the drive of the first spring. At this time, the push rod will push the lamp housing inside the lower mold out in the upward direction, thereby automatically unloading the injection-molded plastic shell.

[0023] 2. The utility model is provided with a second cylinder, a positioning rod, a hose and a cooling pipe. When the second cylinder is running, it will drive the lifting plate to move up and down as a whole. When the lifting plate drives the bottom end of the lifting block to contact the top of the lower mold, the upper mold and the lower mold will be in a mold-closing state. At the same time, the four positioning rods will be located inside the lower mold. Due to the design of the four positioning rods, the accuracy of the mold closing between the upper mold and the lower mold can be increased. When the upper mold completes the injection molding of the interior of the top of the lower mold, the operator transports coolant to the cooling pipe through the hose. At this time, the temperature emitted by the hot-melt plastic inside the lower mold will be absorbed by the coolant inside the cooling pipe, so that the hot-melt plastic can be quickly cooled, and the lamp housing can be quickly formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the utility model;

[0025] Figure 2This is a schematic diagram of the back structure of the utility model;

[0026] Figure 3 This is a schematic cross-sectional view of the utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the top rod of the utility model;

[0028] Figure 5 This is a schematic cross-sectional view of the limit rod of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the cooling pipe of the utility model;

[0030] Figure 7 for Figure 3 Schematic diagram of the locally enlarged structure at point A in the middle.

[0031] In the figure: 1. base; 2. short groove; 3. square block; 4. first hinge block; 5. moving rod; 6. second hinge block; 7. lifting rod; 8. limit rod; 9. round tube; 10. first spring; 11. cylinder; 12. lower mold; 13. round groove; 14. ejector rod; 15. second spring; 16. motor; 17. long shaft; 18. screw; 19. fixed frame; 20. vertical plate; 21. guide rail; 22. fixed frame; 23. first cylinder; 24. moving plate; 25. connecting rod; 26. movable plate; 27. second cylinder; 28. lifting plate; 29. ​​fixed box; 30. feed pipe; 31. lifting block; 32. upper mold; 33. positioning rod; 34. cooling pipe; 35. hose. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figures 1 to 7 As shown, the utility model provides a full plastic shell injection molding device, including:

[0034] The base 1 has a short slot 2 at its top and a fixing frame 19 fixedly mounted on its top;

[0035] The driving mechanism is arranged at the top of the right side of the base 1;

[0036] The motion mechanism is arranged inside the short slot 2;

[0037] Among them, the motion mechanism includes a square block 3, the outer surface of the square block 3 is movably connected to the inside of the short slot 2, the top of the square block 3 is fixedly installed with a first hinge block 4, the inside of the first hinge block 4 is hinged with a motion rod 5, the other end of the motion rod 5 is hinged with a second hinge block 6, and the left side of the second hinge block 6 is fixedly installed with a lifting rod 7. The interiors of the front and rear ends of the lifting rod 7 are movably sleeved with a limit rod 8, and the bottom end of the limit rod 8 is fixedly connected to the top of the base 1. The interior of the top of the lifting rod 7 is fixedly sleeved with a circular tube 9, and the interior of the circular tube 9 is fixedly installed with a first spring 10. The top of the first spring 10 is fixedly installed with a cylinder 11, the outer surface of the cylinder 11 is movably sleeved with the interior of the circular tube 9, and the top of the cylinder 11 is movably connected with a lower mold 12. A circular groove 13 is provided on the right side of the bottom end of the lower mold 12, and a push rod 14 is movably sleeved inside the circular groove 13. The outer surface of the push rod 14 is fixedly installed with a second spring 15, and the top of the second spring 15 is fixedly connected to the interior of the circular groove 13.

[0038] Due to the limitation of the short slot 2, the square block 3 can only move left and right. When the square block 3 drives the first hinge block 4 to move to the left, the first hinge block 4 will drive the second hinge block 6 to move through the motion rod 5. Due to the limitation of the two limit rods 8, the second hinge block 6 will drive the lifting rod 7 to move upward along the outer surface of the two limit rods 8. At this time, the lifting rod 7 will drive the three circular tubes 9 to move upward as a whole. Due to the design of the bottom end of the lower mold 12, the movement of the three cylinders 11 will be blocked. At this time, the three circular tubes 9 will cooperate with the three cylinders 11 to compress the three first springs 10 during the upward movement. When the lower mold 12 drives the three circular grooves 13 to move to the mulberry cylinder 11, the bottom end of the lower mold 12 will release the blocking effect on the three cylinders 11. At this time, the three cylinders 11 will move upward under the elastic force of the three first springs 10. At this time, the three first springs 10 will push the three ejector rods 14 during the upward movement, so that the three ejector rods 14 move upward along the inside of the three circular grooves 13. In this process, the three second springs 15 will be compressed. Due to the elastic force of the three second springs 15, the three ejector rods 14 will have a good reset effect. At the same time, the three ejector rods 14 will push the lamp housing inside the top of the lower mold 12 during the upward movement, so that the lamp housing moves out of the inside of the top of the lower mold 12.

[0039] The driving mechanism includes:

[0040] The motor 16 has a left end fixedly connected to the top of the right side of the base 1, and the other end of the output shaft of the motor 16 is fixedly sleeved with a long shaft 17, and the outer surface of the long shaft 17 is movably sleeved with the inner surface of the base 1;

[0041] The screw rod 18 has its right end fixedly sleeved with the left end of the long shaft 17 , its left end movably sleeved with the inside of the short slot 2 , and its outer surface sleeved with the inner thread of the square block 3 .

[0042] Since the screw 18 is threadedly connected to the square block 3, when the motor 16 is running, the long shaft 17 will drive the screw 18 to rotate, and the screw 18 will drive the square block 3 to move left and right inside the short slot 2.

[0043] A vertical plate 20 is fixedly mounted on the top of the base 1 , a guide rail 21 is fixedly mounted on the outer surface of the vertical plate 20 , and the outer surface of the guide rail 21 is movably connected to the interior of the front and rear sides of the lower mold 12 .

[0044] Due to the design of the guide rail 21 , the movement of the lower mold 12 is limited so that the lower mold 12 can only move left and right, and support is provided for the movement of the lower mold 12 so that the movement of the lower mold 12 is more stable.

[0045] A fixing frame 22 is fixedly installed on the left side of the top of the base 1 , and a first cylinder 23 is fixedly sleeved inside the fixing frame 22 .

[0046] When the first cylinder 23 is in operation, the right end of the first cylinder 23 will move leftward.

[0047] Among them, a moving plate 24 is fixedly installed on the right end of the first cylinder 23, and connecting rods 25 are fixedly installed on the front and rear ends of the right side of the moving plate 24. A movable plate 26 is fixedly installed on the right end of the connecting rod 25, and the left side of the movable plate 26 is fixedly connected to the right side of the lower mold 12.

[0048] When the first cylinder 23 is running, the right end of the first cylinder 23 will drive the moving plate 24 to move to the left. At the same time, the moving plate 24 will drive the movable plate 26 to move to the left through the connecting rod 25. Then the lower mold 12 as a whole will move to the left along the outer surface of the guide rail 21 driven by the movable plate 26.

[0049] Among them, the second cylinder 27 is fixedly installed on the front and rear sides of the top of the base 1, and the top of the outer surface of the second cylinder 27 is fixedly sleeved with a lifting plate 28.

[0050] When the second cylinder 27 is in operation, the top end of the second cylinder 27 drives the lifting plate 28 to move up and down as a whole.

[0051] A fixed box 29 is fixedly installed on the top of the lifting plate 28 , a feed pipe 30 is fixedly sleeved inside the right side of the fixed box 29 , and the interior of the bottom end of the fixed box 29 is connected to the interior of the lifting plate 28 .

[0052] When the lifting plate 28 moves up and down, the fixed box 29 as a whole will move up and down driven by the lifting plate 28. Due to the design of the two feeding pipes 30, hot melt plastic can be transported to the interior of the fixed box 29. Since the interior of the fixed box 29 is connected to the interior of the lifting plate 28, the hot melt plastic inside the fixed box 29 can flow into the interior of the lifting plate 28.

[0053] A lifting block 31 is fixedly mounted on the bottom end of the lifting plate 28 , and the interior of the lifting block 31 is communicated with the interior of the lifting plate 28 .

[0054] When the lifting plate 28 moves up and down, the lifting block 31 as a whole will move up and down driven by the lifting plate 28. Since the interior of the lifting block 31 is connected to the interior of the lifting plate 28, the hot melt plastic inside the lifting plate 28 can flow into the interior of the lifting block 31.

[0055] An upper die 32 is fixedly mounted on the bottom end of the lifting block 31 . The interior of the upper die 32 is communicated with the interior of the lifting block 31 . A positioning rod 33 is fixedly mounted on the outer surface of the lifting block 31 .

[0056] When the lifting block 31 moves up and down, it will drive the three upper molds 32 to move up and down. Since the interiors of the three upper molds 32 are connected to the interior of the lifting block 31, the hot melt plastic inside the lifting block 31 can flow to the interiors of the three upper molds 32. When the bottom end of the lifting block 31 contacts the top of the lower mold 12 during the downward movement, the upper mold 32 and the lower mold 12 will be in a closed mold state. At this time, the three upper molds 32 will inject the hot melt plastic into the interior of the top of the lower mold 12, thereby completing the injection molding operation. Due to the design of the four positioning rods 33, the accuracy of the closing of the upper mold 32 and the lower mold 12 can be guaranteed.

[0057] A cooling pipe 34 is fixedly sleeved inside the lower mold 12 , and a hose 35 is fixedly sleeved on the right end of the cooling pipe 34 .

[0058] Due to the design of the two hoses 35, coolant can be transported and output to the interior of the cooling tube 34. When the coolant flows inside the cooling tube 34, it can absorb the heat generated by the hot-melt plastic, thereby allowing the lamp housing to be quickly cooled and formed.

[0059] The working principle and use process of this utility model:

[0060] First, the operator starts the four second cylinders 27 at the same time. At this time, the other ends of the four second cylinders 27 will drive the lifting plate 28 to move downward. Then the lifting plate 28 will simultaneously drive the fixed box 29 and the lifting block 31 to move downward. Then the lifting block 31 will simultaneously drive the upper mold 32 and the four positioning rods 33 to move downward. At this time, the four positioning rods 33 will move to the inside of the lower mold 12 during the downward movement. Due to the design of the four positioning rods 33, the accuracy of the mold clamping between the lifting block 31 as a whole and the lower mold 12 will be increased. When the bottom end of the lifting block 31 is aligned with the lower mold 12, the upper mold 32 and the four positioning rods 33 will move downward. When the top of the upper mold 32 contacts the top of the lower mold 12, the upper mold 32 will be located inside the top of the lower mold 12. At this time, the upper mold 32 and the lower mold 12 will be in a mold closing state. Then the hot melt plastic inside the fixed box 29 will flow to the inside of the lower mold 12 through the lifting plate 28, the lifting block 31 and the upper mold 32. Then the operator transports coolant to the inside of the cooling pipe 34 through the hose 35. At this time, the temperature emitted by the hot melt plastic inside the lower mold 12 will be absorbed by the coolant inside the cooling pipe 34, so that the hot melt plastic can be quickly cooled, thereby achieving the function of rapid molding of the lamp housing.

[0061] When the injection molding of the lamp housing is completed, the operator starts the four second cylinders 27 again. At this time, the four second cylinders 27 will drive the lifting plate 28 to move upward as a whole. At this time, the lamp housing will stay inside the top of the lower mold 12. At this time, the operator starts the motor 16. At this time, the long shaft 17 will drive the screw 18 to rotate. Since the outer surface of the screw 18 is sleeved with the internal thread of the square block 3, when the screw 18 rotates, it will drive the square block 3 to move. Due to the design inside the short slot 2, the movement of the square block 3 will be limited so that it can only move left and right. At this time, the square block 3 will move to the left along the inside of the short slot 2 under the drive of the screw 18. At the same time, An articulated block 4 will move to the left driven by the square block 3, and then the first articulated block 4 will drive the motion rod 5 to move, and then the other end of the motion rod 5 will squeeze the second articulated block 6, so that the second articulated block 6 drives the lifting rod 7 to move. Due to the design of the two limit rods 8, the movement of the lifting rod 7 will be limited so that it can only move up and down. At this time, the lifting rod 7 will move upward along the outer surface of the two limit rods 8 driven by the second articulated block 6. At the same time, the three round tubes 9 will move upward under the drive of the lifting rod 7. Since the top ends of the three cylinders 11 are movably connected to the bottom end of the lower mold 12, the three round tubes 9 will move upward with the three cylinders 11 in the upward movement. The three cylinders 11 cooperate to compress the three first springs 10, and then the operator starts the first cylinder 23. At this time, the other end of the first cylinder 23 will drive the moving plate 24 to move to the left. At the same time, the moving plate 24 will drive the movable plate 26 to move to the left through the connecting rod 25. Then the lower mold 12 will move to the left along the outer surface of the guide rail 21 driven by the movable plate 26. When the circular groove 13 moves to the top of the cylinder 11, the bottom end of the lower mold 12 will release the contact with the three cylinders 11, thereby releasing the blocking effect on the three cylinders 11. Due to the elastic force of the three first springs 10, the three cylinders 11 will be Driven to move upward along the inside of the three circular tubes 9, the top ends of the three first springs 10 will squeeze and push the bottom ends of the three ejector rods 14 during the upward movement, so that the three ejector rods 14 move upward along the inside of the three circular grooves 13. At this time, the top ends of the three ejector rods 14 will push the lamp housing inside the top end of the lower mold 12 during the upward movement, so that the lamp housing moves out of the inside of the top end of the lower mold 12, thereby realizing the function of automatic unloading of the injection-molded plastic shell. In this process, the three second springs 15 will be compressed by the three ejector rods 14. Due to the elastic force of the three second springs 15, the movement of the three ejector rods 14 will have a good reset effect.

[0062] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A full plastic shell injection molding device, characterized in that: Includes: A base (1), wherein a short slot (2) is provided at the top of the base (1), and a fixing frame (19) is fixedly mounted at the top of the base (1); A driving mechanism, the driving mechanism being arranged at the top end of the right side of the base (1); A motion mechanism, the motion mechanism being arranged inside the short slot (2); The motion mechanism comprises a square block (3), the outer surface of the square block (3) is movably connected to the interior of the short slot (2), a first hinge block (4) is fixedly installed on the top of the square block (3), a motion rod (5) is hinged inside the first hinge block (4), the other end of the motion rod (5) is hinged to the second hinge block (6), a lifting rod (7) is fixedly installed on the left side of the second hinge block (6), the interior of the front and rear ends of the lifting rod (7) are movably sleeved with a limit rod (8), the bottom end of the limit rod (8) is fixedly connected to the top of the base (1), and the top of the lifting rod (7) is hinged inside A circular tube (9) is fixedly sleeved, a first spring (10) is fixedly installed inside the circular tube (9), a cylinder (11) is fixedly installed on the top end of the first spring (10), the outer surface of the cylinder (11) is movably sleeved with the inside of the circular tube (9), the top end of the cylinder (11) is movably connected to a lower mold (12), a circular groove (13) is provided on the right side of the bottom end of the lower mold (12), a push rod (14) is movably sleeved inside the circular groove (13), a second spring (15) is fixedly installed on the outer surface of the push rod (14), and the top end of the second spring (15) is fixedly connected to the inside of the circular groove (13).

2. The all-plastic housing injection molding device according to claim 1, characterized in that: The driving mechanism includes: A motor (16), wherein the left end of the motor (16) is fixedly connected to the top end of the right side of the base (1), the other end of the output shaft of the motor (16) is fixedly sleeved with a long shaft (17), and the outer surface of the long shaft (17) is movably sleeved with the interior of the base (1); The screw rod (18) has a right end whose interior is fixedly sleeved with the left end of the long shaft (17), a left end of the screw rod (18) is movably sleeved with the interior of the short groove (2), and an outer surface of the screw rod (18) is sleeved with the internal thread of the square block (3).

3. The all-plastic housing injection molding device according to claim 1, characterized in that: A vertical plate (20) is fixedly mounted on the top of the base (1), a guide rail (21) is fixedly mounted on the outer surface of the vertical plate (20), and the outer surface of the guide rail (21) is movably connected to the interior of the front and rear sides of the lower mold (12).

4. The all-plastic housing injection molding device according to claim 1, characterized in that: A fixing frame (22) is fixedly mounted on the left side of the top end of the base (1), and a first cylinder (23) is fixedly sleeved inside the fixing frame (22).

5. The all-plastic housing injection molding device according to claim 4, characterized in that: A moving plate (24) is fixedly mounted on the right end of the first cylinder (23), connecting rods (25) are fixedly mounted on both the front and rear ends of the right side of the moving plate (24), a movable plate (26) is fixedly mounted on the right end of the connecting rod (25), and the left side of the movable plate (26) is fixedly connected to the right side of the lower mold (12).

6. The all-plastic housing injection molding device according to claim 1, characterized in that: A second cylinder (27) is fixedly mounted on both the front and rear sides of the top of the base (1), and a lifting plate (28) is fixedly sleeved on the top of the outer surface of the second cylinder (27).

7. The all-plastic housing injection molding device according to claim 6, characterized in that: A fixed box (29) is fixedly mounted on the top of the lifting plate (28), a feed pipe (30) is fixedly sleeved inside the right side of the fixed box (29), and the interior of the bottom end of the fixed box (29) is connected to the interior of the lifting plate (28).

8. The all-plastic housing injection molding device according to claim 6, characterized in that: A lifting block (31) is fixedly mounted on the bottom end of the lifting plate (28), and the interior of the lifting block (31) is connected to the interior of the lifting plate (28).

9. The all-plastic housing injection molding device according to claim 8, characterized in that: An upper die (32) is fixedly mounted on the bottom end of the lifting block (31), the interior of the upper die (32) is connected to the interior of the lifting block (31), and a positioning rod (33) is fixedly mounted on the outer surface of the lifting block (31).

10. The all-plastic housing injection molding device according to claim 1, characterized in that: A cooling pipe (34) is fixedly sleeved inside the lower mold (12), and a hose (35) is fixedly sleeved at the right end of the cooling pipe (34).

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