An injection mold that is easy to dissipate heat

Abstract

The invention discloses an injection mold which is easy to dissipate heat, comprising a lower mold frame, an upper mold frame, an injection tube, a cooling mechanism and an ejector mechanism. The lower mold frame is connected to the upper mold frame through a positioning guide column, the injection tube is fixedly installed in the middle of the upper mold frame, the upper mold core is fixedly installed on one side of the upper mold frame, the injection tube is located at the center of the upper mold core, the lower mold core is fixedly arranged in the lower mold frame, a cooling mechanism is arranged under the lower mold core, cooling tubes and fans in the cooling mechanism are arranged around the lower mold core, the lower mold core is cooled and dissipated by the cooling tubes and the fan, and an ejector mechanism is arranged at the lower end of the lower mold core; the invention adopts a combination of water cooling and fan cooling to cool the workpiece, the fan cooling can cool the flowing water in the water cooling structure while cooling the workpiece, so as to prevent the water temperature from rising due to the influence of the workpiece temperature and the water cooling effect from decreasing, the cooling speed of the workpiece is improved through the secondary structure, and the demoulding efficiency and success rate of the workpiece are improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold that is easy to dissipate heat. Background Art

[0002] Injection molding is a method for producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting; injection molding types are: 1. Rubber injection molding: Rubber injection molding is a production method in which the rubber material is directly injected from the barrel into the model for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is eliminated, the labor intensity is low, and the product quality is excellent; 2. Plastic injection molding: Plastic injection molding is a method of plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired various plastic parts are obtained by cooling and molding. There are mechanical injection molding machines specifically used for injection molding. The most commonly used plastics at present are polyethylene, polypropylene, ABS, PA, polystyrene, etc.; 3. Molding injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as the final product. Many details, such as bosses, ribs, and threads, can be molded in one step of injection molding.

[0003] Existing injection molds have poor heat dissipation. When dissipating heat, they use a single water cooling method or natural heat dissipation, which has poor heat dissipation performance. Poor mold heat dissipation will cause difficulty in demolding or deformation of the workpiece, and low work efficiency.

[0004] Therefore, in response to the above problems, the following solutions are proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an injection mold that is easy to dissipate heat, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection mold that is easy to dissipate heat, comprising a lower mold frame, an upper mold frame, an injection tube, a cooling mechanism, and an ejector mechanism, wherein the lower mold frame is connected to the upper mold frame through a positioning guide column, an injection tube is fixedly installed in the middle of the upper mold frame, an upper mold core is fixedly installed on one side of the upper mold frame, the injection tube is located at the center of the upper mold core, a lower mold core is fixedly arranged in the lower mold frame, a cooling mechanism is arranged under the lower mold core, cooling tubes and fans in the cooling mechanism are arranged around the lower mold core, the lower mold core is cooled and dissipated by the cooling tubes and fans, and an ejector mechanism is arranged at the lower end of the lower mold core;

[0007] The cooling mechanism includes: a motor, a first ring of teeth, and a first gear. The motor is fixedly arranged in the lower mold frame, the motor output shaft is fixedly connected to the center of one side of the cross, the other side of the cross is fixedly connected to the first ring of teeth, the first ring of teeth is rotatably arranged in the lower mold frame, teeth are arranged on the inner side of the first ring of teeth, the inner side of the first ring of teeth is meshed and connected to four first gears, each first gear is rotatably installed in the lower mold frame, one side of the first gear is fixedly connected to one end of the first connecting rod, the other end of the first connecting rod is fixedly connected to the first bevel gear, the first bevel gear is meshed and connected with the second bevel gear, the second bevel gear is rotatably installed in the lower mold frame, the side of the second bevel gear close to the lower mold core is fixedly connected to one end of the second connecting rod, the other end of the second connecting rod is fixedly connected to the fan, and the fan is arranged on the outer side of the lower mold core;

[0008] One end of the third connecting rod is fixedly connected to the center of one side of the eccentric wheel, and the other end of the third connecting rod is fixedly connected to the center of one side of the eccentric wheel. One end of the first push rod is hinged at the non-center of the other side of the eccentric wheel, and the other end of the first push rod is hinged to the lower end of the slider. The slider is slidably installed in the slide rail, and the slide rail is fixedly set in the lower mold frame. One side of the slider is fixedly connected to one end of the second push rod, and the second push rod extends out of the slide rail and extends into the circulation box. One end of the second push rod extending into the circulation box is fixedly connected to the piston, and the piston is set in the circulation box. One side of the circulation box is fixedly connected to the first one-way valve, and the first one-way valve is a water outlet valve. One end of the first water pipe is fixedly connected to the first one-way valve, and the other end of the first water pipe is fixedly connected to the cooling pipe. The cooling pipe is fixedly surrounded by the outer side of the lower mold core, one end of the second water pipe is fixedly installed on the cooling pipe, and the other end of the second water pipe is fixedly connected to the second one-way valve, and the second one-way valve is fixedly connected to the circulation box.

[0009] The ejector mechanism includes a push rod and an ejector. One end of the push rod is fixedly connected to the lower surface of the upper mold frame, and the other end of the push rod is fixedly connected to the push plate. A base is fixedly arranged on the push plate, and one end of four ejectors is fixedly connected to the base. The other end of the ejector extends into a sleeve, and the sleeve is fixedly arranged in the lower mold frame. The inner wall of the sleeve is fixedly connected to one end of a first spring, and the other end of the first spring is fixedly connected to one side of an ejector block. The first spring is sleeved on the outer surface of the first telescopic rod, one end of the first telescopic rod is fixedly connected to the inner wall of the sleeve, and the other end is fixedly connected to one side of the ejector block. The ejector block is slidably installed in the sleeve, one end of a fourth connecting rod is fixedly connected to the ejector block, and the other end of the fourth connecting rod is fixedly connected to one side of a baffle. The baffle is slidably installed on the lower surface of the lower mold core, and the lower mold core is provided with a notch for installing the baffle, and the baffle is semicircular.

[0010] Preferably, the circulation box adopts an existing vacuum box with good sealing performance.

[0011] Preferably, the ejector block and the related connecting parts are in two groups, the two baffles form a circle, the top of the ejector pin is wedge-shaped, and the side surface of the top of the ejector pin is in contact and connected with the surface of the ejector block.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts a combination of water cooling and fan cooling to cool the workpiece. The fan cooling can cool the flowing water in the water cooling structure while cooling the workpiece, preventing the water temperature from rising due to the influence of the workpiece temperature and reducing the water cooling effect. Cooling the workpiece by combining water cooling and fan cooling increases the cooling speed of the workpiece, and improves the demolding efficiency and success rate of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the main structure of the cooling mechanism of the present invention;

[0015] Figure 3 It is a schematic diagram of the piston installation of the present invention;

[0016] Figure 4 It is a schematic diagram of the main structure of the ejector mechanism of the present invention;

[0017] Figure 5 It is a schematic diagram of the main internal structure of the casing of the present invention;

[0018] Figure 6 It is a schematic diagram of the installation position structure of the cooling mechanism and the ejector mechanism of the present invention;

[0019] Figure 7 It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] In the figure: 1, lower mold frame, 2, upper mold frame, 201, positioning guide column, 202, upper mold core, 3, injection tube, 4, cooling mechanism, 401, motor, 402, cross, 403, first ring gear, 404, eccentric wheel, 4041, third connecting rod, 405, first gear, 406, first push rod, 407, slider, 408, slide rail, 409, second push rod, 4091, piston, 410, circulation box, 411, first one-way valve, 412, second one-way valve, 413. second water pipe, 414. first water pipe, 415. cooling pipe, 416. first connecting rod, 417. first bevel gear, 418. second bevel gear, 419. second connecting rod, 420. fan, 421. lower mold core, 5. ejector mechanism, 501. push rod, 5011. push plate, 502. base, 503. ejector, 504. sleeve, 505. ejector block, 506. first spring, 507. first telescopic rod, 508. fourth connecting rod, 509. baffle. DETAILED DESCRIPTION

[0021] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-7 , the present invention provides a technical solution:

[0023] In order to improve the cooling performance of the device, an injection mold that is easy to dissipate heat is proposed, including a lower mold frame 1, an upper mold frame 2, an injection tube 3, a cooling mechanism 4, and an ejector mechanism 5. The lower mold frame 1 is connected to the upper mold frame 2 through a positioning guide column 201, the injection tube 3 is fixedly installed in the middle of the upper mold frame 2, and the upper mold core 202 is fixedly installed on one side of the upper mold frame 2. The injection tube 3 is located at the center of the upper mold core 202, and a lower mold core 421 is fixedly arranged in the lower mold frame 1. A cooling mechanism 4 is arranged under the lower mold core 421. The cooling pipe 415 and the fan 420 in the cooling mechanism 4 are arranged around the lower mold core 421. The lower mold core 421 is cooled and dissipated by the cooling pipe 415 and the fan 420, and the ejector mechanism 5 is arranged at the lower end of the lower mold core 421.

[0024] The cooling mechanism 4 includes: a motor 401, a first ring gear 403, and a first gear 405. The motor 401 is fixedly arranged in the lower mold frame 1. The output shaft of the motor 401 is fixedly connected to the center of one side of the cross 402, and the other side of the cross 402 is fixedly connected to the first ring gear 403. The first ring gear 403 is rotatably arranged in the lower mold frame 1. Teeth are arranged on the inner side of the first ring gear 403. The inner side of the first ring gear 403 is meshed and connected with four first gears 405. Each first gear 405 is rotatably arranged in the lower mold frame 1. One side of the first gear 405 is fixedly connected to one end of the first connecting rod 416, and the other end of the first connecting rod 416 is fixedly connected to the first bevel gear 417. The first bevel gear 417 is meshed and connected with the second bevel gear 418. The second bevel gear 418 is rotatably arranged in the lower mold frame 1. The second bevel gear 418 is fixedly connected to one end of the second connecting rod 419 on one side close to the lower mold core 421, and the other end of the second connecting rod 419 is fixedly connected to the fan 420. The fan 420 is arranged on the outer side of the lower mold core 421.

[0025] The operation of the motor 401 drives the cross 402 to rotate, and the rotation of the cross 402 drives the first ring gear 403 to rotate. The rotation of the first ring gear 403 will drive the four first gears 405 meshing with it to rotate. The first gear 405 rotates in the lower mold frame 1, and the first gear 405 is fixedly connected to the first bevel gear 417 through the first connecting rod 416, so the first bevel gear 417 will rotate accordingly, and the first bevel gear 417 is meshed with the second bevel gear 418, so the second bevel gear 418 will rotate, and the second bevel gear 418 is fixedly connected to the fan 420 through the second connecting rod 419, so the fan 420 rotates, and the fan 420 is located on the outside of the lower mold core 421 to cool the lower mold core 421.

[0026] In order to achieve water cooling, an injection mold that is easy to dissipate heat is proposed. The center of the cross 402 is fixedly connected to one end of a third connecting rod 4041, and the other end of the third connecting rod 4041 is fixedly connected to the center of one side of the eccentric wheel 404. The other side of the eccentric wheel 404 is hinged to one end of a first push rod 406 at a non-center point, and the other end of the first push rod 406 is hinged to the lower end of a slider 407. The slider 407 is slidably installed in a slide rail 408, and the slide rail 408 is fixedly set in the lower mold frame 1. One side of the slider 407 is fixedly connected to one end of a second push rod 409, and the second push rod 409 extends out of the slide rail 408 and extends into the circulation box 410. The second push rod 409 extends into the circulation box 410. One end of the box 410 is fixedly connected to the piston 4091, and the piston 4091 is arranged in the circulation box 410. One side of the circulation box 410 is fixedly connected to the first one-way valve 411, and the first one-way valve 411 is a water outlet valve. The first one-way valve 411 is fixedly connected to one end of the first water pipe 414, and the other end of the first water pipe 414 is fixedly connected to the cooling pipe 415. The cooling pipe 415 is fixedly surrounded by the outer side of the lower mold core 421. One end of the second water pipe 413 is fixedly installed on the cooling pipe 415, and the other end of the second water pipe 413 is fixedly connected to the second one-way valve 412. The second one-way valve 412 is fixedly connected to the circulation box 410, and the second one-way valve 412 is a water inlet valve.

[0027] The circulation box 410 adopts an existing vacuum box with good sealing performance.

[0028] The first one-way valve 411 and the second one-way valve 412 adopt the existing one-way valve technology.

[0029] The cross 402 rotates under the drive of the motor 401, and the rotation of the cross 402 drives the eccentric wheel 404 to rotate. The connection end of the eccentric wheel 404 and the first push rod 406 moves. The length of the first push rod 406 remains unchanged, so the first push rod 406 applies a thrust or a pull to the slider 407, so that the slider 407 slides in the slide rail 408. This structure is similar to the existing crank slider structure. When the slider 407 moves, it drives the second push rod 409 to move. When the slider 407 pushes the second push rod 409 to move, the second push rod 409 Rod 409 will push piston 4091 to move, and piston 4091 will make the water in circulation box 410 flow into first water pipe 414 through first one-way valve 411, and then flow into cooling pipe 415. When slider 407 pulls second push rod 409 to move, piston 4091 will pump water from cooling pipe 415 into second water pipe 413, and continue to pump water into circulation box 410 through second one-way valve 412. Repeated operation can realize water circulation. Water circulation can prevent water from staying in cooling pipe 415 for a long time and causing water temperature to rise due to the temperature of the workpiece itself.

[0030] After the injection molding is completed, the upper mold frame 2 moves upward, and then the demoulding operation needs to be performed. The ejector pin 503 will demould the workpiece. Before the ejector pin 503 contacts the workpiece, a cooling time needs to be reserved. Therefore, in the initial state, there is a certain distance between the ejector pin 503 and the lower mold core 421, that is, the length of the sleeve 504 and the fourth connecting rod 508 in the device. Therefore, in order to prevent the workpiece from flowing into the sleeve 504 during the injection molding of the device, an injection mold that is easy to dissipate heat is proposed. The ejector pin mechanism 5 includes a push rod 501 and an ejector pin 503. One end of the push rod 501 is fixedly connected to the lower surface of the upper mold frame 2, and the other end of the push rod 501 is fixedly connected to a push plate 5011. A base 502 is fixedly arranged on the push plate 5011, and one end of four ejector pins 503 is fixedly connected to the base 502. 03 The other end extends into the sleeve 504, the sleeve 504 is fixedly arranged in the lower mold frame 1, the inner wall of the sleeve 504 is fixedly connected to one end of the first spring 506, the other end of the first spring 506 is fixedly connected to one side of the top block 505, the first spring 506 is sleeved on the outer surface of the first telescopic rod 507, one end of the first telescopic rod 507 is fixedly connected to the inner wall of the sleeve 504, and the other end is fixedly connected to one side of the top block 505, the top block 505 is slidably installed in the sleeve 504, one end of the fourth connecting rod 508 is fixedly connected to the top block 505, the other end of the fourth connecting rod 508 is fixedly connected to one side of the baffle 509, the baffle 509 is slidably installed on the lower surface of the lower mold core 421, the lower mold core 421 is provided with a notch for installing the baffle 509, and the baffle 509 is semicircular.

[0031] The ejector block 505 and related connecting parts are divided into two groups. The two baffles 509 form a circle. The top of the ejector pin 503 is wedge-shaped. The side surface of the top of the ejector pin 503 is in contact and connected with the surface of the ejector block 505.

[0032] The first telescopic rod 507 adopts an existing common telescopic rod.

[0033] When the device is working, the two ejector blocks 505 are in contact with each other to prevent the work material from flowing into the sleeve 504. When the upper mold frame 2 rises, the push rod 501 will be driven to move upward, the base 502 will move upward, and the ejector pin 503 will move upward. The ejector pin 503 will gradually move upward, and the side wall of the ejector pin 503 will apply pressure to the ejector block 505, and the ejector block 505 will gradually move, so that the first spring 506 will be gradually compressed, the first telescopic rod 507 will be shortened, the fourth connecting rod 508 will move with the ejector block 505, and the baffle plate 509 will move with the fourth connecting rod 508. The two baffle plates 509 will gradually move away from each other until the ejector pin 503 can extend out of the sleeve 504 and eject the workpiece to demould.

[0034] When the ejector pin 503 moves downward, the pressure on the side wall of the ejector block 505 gradually decreases, the first spring 506 gradually returns to its original position, the first telescopic rod 507 extends, the ejector block 505 returns to its original position, and the two baffles 509 gradually merge.

[0035] Working principle of the present invention:

[0036] The upper mold frame 2 moves downward, the upper mold core 202 contacts the lower mold core 421, and the injection tube 3 injects the work material into the lower mold core 421. After the work material injection is completed, the motor 401 is turned on;

[0037] The operation of the motor 401 drives the cross 402 to rotate, the rotation of the cross 402 drives the first ring gear 403 to rotate, the first ring gear 403 rotates the four first gears 405, the first gear 405 rotates in the lower mold frame 1, the first bevel gear 417 rotates, the second bevel gear 418 rotates, the fan 420 rotates, and the fan 420 is located outside the lower mold core 421 to cool the lower mold core 421.

[0038] The rotation of the cross 402 drives the eccentric wheel 404 to rotate, and the connection end of the eccentric wheel 404 and the first push rod 406 will move, the slider 407 slides in the slide rail 408, and the second push rod 409 moves. The second push rod 409 will push the piston 4091 to move, and the piston 4091 will make the water in the circulation box 410 flow to the first water pipe 414 through the first one-way valve 411, and flow to the cooling pipe 415. When the slider 407 pulls the second push rod 409 to move, the piston 4091 will pump water from the cooling pipe 415 to the second water pipe 413, and continue to pump it into the circulation box 410 through the second one-way valve 412. The operation is repeated to realize water circulation. The circulation of water can prevent the water from staying in the cooling pipe 415 for a long time and causing the water temperature to rise due to the temperature of the workpiece itself.

[0039] After the injection molding is completed, the upper mold frame 2 moves upward, and then the demolding operation needs to be performed. The ejector pin 503 will demold the workpiece. Before the ejector pin 503 contacts the workpiece, a cooling time needs to be reserved. Therefore, in the initial state, there is a certain distance between the ejector pin 503 and the lower mold core 421, that is, the length of the sleeve 504 and the fourth connecting rod 508 in the device. This is to prevent the workpiece from flowing into the sleeve 504 during the injection molding of the device.

[0040] When the device is working, the two ejector blocks 505 are in contact with each other to prevent the work material from flowing into the sleeve 504. When the upper mold frame 2 rises, the push rod 501 will be driven to move upward, the base 502 will move upward, and the ejector pin 503 will move upward. The ejector pin 503 will gradually move upward, and the side wall of the ejector pin 503 will apply pressure to the ejector block 505, and the ejector block 505 will gradually move, so that the first spring 506 will be gradually compressed, the first telescopic rod 507 will be shortened, the fourth connecting rod 508 will move with the ejector block 505, and the baffle plate 509 will move with the fourth connecting rod 508. The two baffle plates 509 will gradually move away from each other until the ejector pin 503 can extend out of the sleeve 504 and eject the workpiece to demould.

[0041] When the ejector pin 503 moves downward, the pressure on the side wall of the ejector block 505 gradually decreases, the first spring 506 gradually returns to its original position, the first telescopic rod 507 extends, the ejector block 505 returns to its original position, and the two baffles 509 gradually merge.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold that is easy to dissipate heat, characterized in that: The invention comprises a lower mold frame (1), an upper mold frame (2), an injection molding tube (3), a cooling mechanism (4), and an ejector mechanism (5); the lower mold frame (1) is connected to the upper mold frame (2) via a positioning guide column (201); the injection molding tube (3) is fixedly installed in the middle of the upper mold frame (2); an upper mold core (202) is fixedly installed on one side of the upper mold frame (2); the injection molding tube (3) is located at the center of the upper mold core (202); a lower mold core (421) is fixedly installed in the lower mold frame (1); a cooling mechanism (4) is arranged under the lower mold core (421); a cooling tube (415) and a fan (420) in the cooling mechanism (4) are arranged around the lower mold core (421); the lower mold core (421) is cooled and dissipated by the cooling tube (415) and the fan (420); and an ejector mechanism (5) is arranged at the lower end of the lower mold core (421); The cooling mechanism (4) comprises: a motor (401), a first ring of teeth (403), and a first gear (405); the motor (401) is fixedly arranged in the lower mold frame (1); the output shaft of the motor (401) is fixedly connected to the center of one side of the cross (402); the other side of the cross (402) is fixedly connected to the first ring of teeth (403); the first ring of teeth (403) is rotatably arranged in the lower mold frame (1); teeth are arranged on the inner side of the first ring of teeth (403); the inner side of the first ring of teeth (403) is meshed and connected to four first gears (405); each of the first gears (405) is rotatably mounted on the lower mold frame (1); ), one side of the first gear (405) is fixedly connected to one end of the first connecting rod (416), the other end of the first connecting rod (416) is fixedly connected to the first bevel gear (417), the first bevel gear (417) is meshingly connected to the second bevel gear (418), the second bevel gear (418) is rotatably mounted in the lower mold frame (1), the side of the second bevel gear (418) close to the lower mold core (421) is fixedly connected to one end of the second connecting rod (419), the other end of the second connecting rod (419) is fixedly connected to the fan (420), and the fan (420) is arranged on the outside of the lower mold core (421); The center of the cross (402) is fixedly connected to one end of a third connecting rod (4041), the other end of the third connecting rod (4041) is fixedly connected to the center of one side of the eccentric wheel (404), the other side of the eccentric wheel (404) is hinged to one end of a first push rod (406) at a non-center point, the other end of the first push rod (406) is hinged to the lower end of a slider (407), the slider (407) is slidably installed in a slide rail (408), the slide rail (408) is fixedly set in the lower mold frame (1), one side of the slider (407) is fixedly connected to one end of a second push rod (409), the second push rod (409) extends out of the slide rail (408) and extends into the circulation box (410), the second push rod (409) extends into the circulation box (410), ) is fixedly connected to a piston (4091), the piston (4091) is arranged in a circulation box (410), one side of the circulation box (410) is fixedly connected to a first one-way valve (411), the first one-way valve (411) is a water outlet valve, one end of a first water pipe (414) is fixedly connected to the first one-way valve (411), the other end of the first water pipe (414) is fixedly connected to a cooling pipe (415), the cooling pipe (415) is fixedly surrounded by the outside of the lower mold core (421), one end of a second water pipe (413) is fixedly installed on the cooling pipe (415), the other end of the second water pipe (413) is fixedly connected to a second one-way valve (412), and the second one-way valve (412) is fixedly connected to the circulation box (410); The ejector mechanism (5) comprises a push rod (501) and an ejector pin (503); one end of the push rod (501) is fixedly connected to the lower surface of the upper mold frame (2); the other end of the push rod (501) is fixedly connected to a push plate (5011); a base (502) is fixedly arranged on the push plate (5011); one end of four ejector pins (503) are fixedly connected to the base (502); the other end of the ejector pin (503) extends into a sleeve (504); the sleeve (504) is fixedly arranged in the lower mold frame (1); the inner wall of the sleeve (504) is fixedly connected to one end of a first spring (506); the other end of the first spring (506) is fixedly connected to the ejector block (5011); 5) on one side, a first spring (506) is sleeved on the outer surface of the first telescopic rod (507), one end of the first telescopic rod (507) is fixedly connected to the inner wall of the sleeve (504), and the other end is fixedly connected to one side of the top block (505), the top block (505) is slidably installed in the sleeve (504), one end of the fourth connecting rod (508) is fixedly connected to the top block (505), and the other end of the fourth connecting rod (508) is fixedly connected to one side of the baffle (509), the baffle (509) is slidably installed on the lower surface of the lower mold core (421), the lower mold core (421) is provided with a notch for installing the baffle (509), and the baffle (509) is semicircular; The top block (505) is in two pieces, the baffles (509) are in two pieces, the fourth connecting rods (508) are in two pieces, the first telescopic rod (507) and the first spring (506) are in two groups, each group of the first telescopic rod (507) and the first spring (506) is fixedly connected to one top block (505), each group of the first spring (506) and the first telescopic rod (507) is formed by two first telescopic rods (507) and two first springs (506) being respectively sleeved, the two baffles (509) form a circle, the top end of the ejector pin (503) is wedge-shaped, and the top side of the ejector pin (503) is in contact and connected with the surface of the top block (505).

2. The injection mold that is easy to dissipate heat according to claim 1, characterized in that: The circulation box (410) adopts an existing vacuum box with good sealing performance.

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