An injection molding device and an injection molding method for improving the injection uniformity of mutual inductors

Abstract

The present invention discloses an injection molding device and an injection molding method for improving the injection uniformity of transformers, which relates to the technical field of current transformers and includes: an operating table, on the upper surface of which two support columns are fixedly connected, the top ends of the support columns are fixedly connected with a support plate, and two injection molding control cylinders are fixedly connected to the lower surface of the support plate. The output end of the injection molding control cylinder is fixedly connected with an injection molding storage box, the bottom of the injection molding storage box is fixedly connected with a main injection molding pipe, and the bottom of the main injection molding pipe is fixedly connected with a centrifugal box; at least one injection molding mechanism, which is arranged and evenly distributed along the circumference of the centrifugal box, and the injection molding mechanism is used for injecting the transformer housing; a molding mechanism, which is arranged on the upper surface of the operating table, and the molding mechanism is used for cooling and forming the transformer housing. By setting the injection molding mechanism, the molding mechanism, the exhaust assembly and the injection molding assembly, the present invention ensures uniform injection molding, and there will be no vacancies in the molded transformer housing.

Description

Technical Field

[0001] The present invention relates to the technical field of current transformers, and particularly to an injection molding device and an injection molding method for improving the injection uniformity of transformers during processing. Background Art

[0002] A transformer, also known as an instrument transformer, is a general term for current transformers and voltage transformers. Its main function is to proportionally transform high voltage or large current into standard low voltage or standard small current to achieve the standardization and miniaturization of measuring instruments, protection equipment, and automatic control equipment. When the outer shell of a transformer is produced, it needs to be injection molded. However, in existing injection molding equipment, injection starts from the top and the injection uniformity is insufficient. Moreover, the internal space of the injection cavity of the transformer's outer shell is narrow, so it is easy for some air inside the injection cavity to be wrapped by the injected plastic, resulting in voids in the cooled injection molded shell and affecting the overall quality of the transformer. In addition, the coil bundled on the current transformer will generate self-inductance, affecting the normal operation of the current transformer.

[0003] To solve the above problems, it is necessary to provide an injection molding device and an injection molding method for improving the injection uniformity of transformers during processing. Summary of the Invention

[0004] To solve the above technical problems, an injection molding device and an injection molding method for improving the injection uniformity of transformers during processing are provided. This technical solution solves the problems in the above background art that in existing injection molding equipment, injection starts from the top and the injection uniformity is insufficient, and the internal space of the injection cavity of the transformer's outer shell is narrow, so it is easy for some air inside the injection cavity to be wrapped by the injected plastic, resulting in voids in the cooled injection molded shell and affecting the overall quality of the transformer. In addition, the coil bundled on the current transformer will generate self-inductance, affecting the normal operation of the current transformer.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An injection molding device and an injection molding method for improving the injection uniformity of transformers during processing, including:

[0007] An operating table, on the upper surface of which two support columns are fixedly connected. The top ends of the support columns are fixedly connected with a support plate. On the lower surface of the support plate, two injection molding control cylinders are fixedly connected. The output ends of the injection molding control cylinders are fixedly connected with an injection molding storage box. The bottom of the injection molding storage box is fixedly connected with a plurality of main injection pipes, and the bottoms of the main injection pipes are fixedly connected with a centrifugal box;

[0008] At least one injection molding mechanism is uniformly arranged along the circumference of the centrifugal box. The injection molding mechanism is used for injecting the outer shell of the current transformer. The injection molding mechanism includes an exhaust component and an injection component. A lifting rod is fixedly connected between the exhaust component and the injection component. The injection component includes a delay tube. The bottom of the delay tube is fixedly connected with an injection conduit, and the injection conduit is communicated with the delay tube. A sliding connection is provided between the lower part of the delay tube and an injection stopper. The bottom end of the injection stopper is a slope. Support blocks are fixedly connected to both the front and rear sides of the injection stopper. A limiting rod is slidably connected to the middle of the support block. The bottom end of the limiting rod is fixedly connected to the surface of the delay tube. A telescopic spring is sleeved on the bottom of the limiting rod. One end of the telescopic spring is fixedly connected to the support block, and the other end of the telescopic spring is fixedly connected to the surface of the delay tube;

[0009] A forming mechanism is arranged on the upper surface of the workbench. The forming mechanism is used for cooling and forming the outer shell of the current transformer. The forming mechanism includes a load-bearing plate, which is fixedly connected to the upper surface of the workbench. A plurality of load-bearing rods are fixedly connected to the rear side of the load-bearing plate. The rear ends of the load-bearing rods are fixedly connected to an injection mold core. A mold closing ring plate is fixedly connected to the middle of the injection mold core. Two injection mold shells are sleeved outside the injection mold core. The injection mold shells are symmetrically distributed. The injection mold shells and the injection mold core jointly form an injection cavity. The inner bottom surface of the injection mold shell abuts against the lower surface of the injection mold core. The lower surface of the injection mold shell abuts against the upper surface of the workbench. A plurality of exhaust ports are formed through the top of the injection mold shell. A plurality of injection ports are formed in the top of the injection mold shell. The bottom ends of the injection ports are sealed. A plurality of communication grooves are formed in the top plate of the injection mold shell. A plurality of flow dividing grooves are formed in the side wall of the injection mold shell. The flow dividing grooves are vertically arranged. A plurality of liquid outlets are formed in the inner bottom of the injection mold shell. The liquid outlets are communicated with the corresponding flow dividing grooves. A communication groove is conducted between the flow dividing groove and the corresponding injection port.

[0010] Preferably, a support rod is slidably connected to the bottom of the injection conduit. The top end of the support rod is fixedly connected with a circular blocking piece. The bottom end of the support rod is fixedly connected with a fixing plate. A retraction spring is fixedly connected to the upper surface of the fixing plate. The top end of the retraction spring is fixedly connected to the bottom end of the injection conduit. An injection branch pipe is fixedly connected to the lower side surface of the injection conduit.

[0011] Preferably, a ventilation small hole is formed through the bottom end of the injection stopper, and the ventilation small hole is formed along the direction of the injection conduit.

[0012] Preferably, a liquid inlet is fixedly connected to the top of the injection storage tank. A centrifugal motor is fixedly connected to the top of the centrifugal box. The output end of the centrifugal motor is fixedly connected with a centrifugal blade, and the centrifugal blade is arranged inside the centrifugal box.

[0013] Preferably, two suspension rods are fixedly connected to the lower surface of the support plate. The bottom of the suspension rod is fixedly connected with an annular plate, and a plurality of exhaust components are installed at the bottom of the annular plate. The plurality of exhaust components are evenly distributed along the circumference of the annular plate. The exhaust component includes a fixed block, the fixed block is fixedly connected to the lower surface of the annular plate, a guide rod is slidably connected to the middle of the fixed block, the guide rod is slidably connected to the annular plate, the bottom end of the guide rod is fixedly connected with a stamping rod, a stamping spring is sleeved on the lower part of the guide rod, the top end of the stamping spring is fixedly connected to the lower surface of the fixed block, and the bottom end of the stamping spring is fixedly connected to the top of the stamping rod. A part of the lower part of the stamping rod is slidably connected with an exhaust pipe, two exhaust holes are opened on the side of the exhaust pipe, a triangular pressing block is fixedly connected to the bottom end of the stamping rod, and a lifting rod is fixedly connected to the outside of the exhaust pipe.

[0014] Preferably, a moving block is slidably connected to the right side of the exhaust pipe. The left side of the moving block is a slope, and the left slope of the moving block abuts against the triangular pressing block. Limiting blocks are fixedly connected to both the upper and lower sides of the moving block. A fixed rod is slidably connected to the side of the limiting block. The left end of the fixed rod is fixedly connected to the exhaust pipe. A return spring is sleeved on the left end of the fixed rod. The left end of the return spring is fixedly connected to the surface of the exhaust pipe, and the right end of the return spring is fixedly connected to the left side of the limiting block.

[0015] Preferably, L-shaped rods are fixedly connected to both sides of the injection molding storage box, and a split mold pressing block is fixedly connected to the bottom of the L-shaped rod.

[0016] Preferably, baffles are fixedly connected to both sides of the upper surface of the workbench. A plurality of split mold springs are fixedly connected to the inner side of the baffle. The inner ends of the split mold springs are fixedly connected with split mold guide blocks. A plurality of guide grooves are opened on the upper surface of the workbench. The bottom of the split mold guide block is slidably connected in the guide groove. A docking rod is fixedly connected to the inner side of the split mold guide block. The docking rod supports and connects the injection molding film shell, and the top slope of the split mold guide block coincides with the bottom slope of the split mold pressing block.

[0017] Preferably, the exhaust pipe corresponds to the exhaust port in position, the size of the exhaust pipe is the same as that of the exhaust port, the injection molding branch pipe corresponds to the injection molding port in position, and the size of the injection molding branch pipe is the same as that of the injection molding port.

[0018] An injection molding method for improving the injection uniformity of current transformers includes the following steps:

[0019] Step 1: Cover a shielding net on the surface of the injection molding core. The injection molding control cylinder controls the split mold pressing block to press down, and the injection molding film shell is closed.

[0020] Step 2: The exhaust pipe is docked at the exhaust port, and the injection molding branch pipe is docked at the injection molding port.

[0021] Step 3: The centrifugal motor drives the centrifugal blades to rotate, so that the injection molding colloid is evenly and quickly injected into the retardation pipe.

[0022] Step 4: The injected plastic body extrudes the injection stopper and enters the injection conduit, flowing into the injection port through the injection branch pipe;

[0023] Step 5: The injected plastic body is diverted from the injection port into the communication groove, injected into the diversion groove, and flows out from the liquid outlet, injecting the mold cavity formed by the injection film shell and the injection mold core;

[0024] Step 6: After the injection cooling is completed, the injection control air cylinder controls the split die pressing block to rise, the injection film shell is split, and the circular stopper seals the injection branch pipe.

[0025] Compared with the prior art, the present invention provides an injection device and an injection method for improving the injection uniformity of transformers, having the following beneficial effects:

[0026] By setting an injection mechanism, a forming mechanism, an exhaust component, and an injection component, it can change the traditional injection method starting from the top, avoiding the situation that some air inside the injection cavity of the transformer housing is wrapped by the injected plastic body due to the narrow internal space of the injection cavity. Therefore, there will be no vacancy in the cooled injection shell, thereby improving the overall quality of the transformer. At the same time, under the acceleration of the centrifugal motor, the injected plastic body can be injected quickly and evenly. The retardation pipe and its related components can ensure that the injected plastic body enters the forming mechanism from multiple injection ports approximately simultaneously during the initial injection, ensuring uniform injection; during injection, a shielding net is installed, and the formed transformer housing has a good shielding effect, which can avoid the interference of the self-inductance of the transformer coil. Brief Description of the Drawings

[0027] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0028] Figure 2 is an exploded structural schematic diagram of the forming mechanism of the present invention;

[0029] Figure 3 is a half-sectional structural schematic diagram of the top plate of the injection film shell of the present invention;

[0030] Figure 4 is a structural schematic diagram of the injection mechanism of the present invention;

[0031] Figure 5 is a half-sectional structural schematic diagram of the injection component of the present invention;

[0032] Figure 6 is a half-sectional structural schematic diagram of the exhaust component of the present invention;

[0033] Figure 7 is Figure 6 a partial enlarged structural schematic diagram at A in

[0034] Figure 8Schematic flow chart of the injection molding method of the present invention;

[0035] The reference numerals in the figure are:

[0036] 101, baffle; 102, demolding spring; 103, guide groove; 104, support column; 105, L-shaped rod; 106, demolding press block; 107, demolding guide block; 108, working table; 109, suspension rod; 110, annular plate; 111, main injection pipe; 112, centrifugal motor; 113, injection storage tank; 114, centrifugal tank; 115, injection control cylinder; 116, support plate; 117, liquid inlet;

[0037] 200, injection mechanism; 201, lifting rod;

[0038] 300, molding mechanism; 301, injection port; 302, exhaust port; 303, injection film shell; 304, injection mold core; 305, mold closing annular plate; 306, load-bearing plate; 307, load-bearing rod; 308, communication groove; 309, diversion groove; 310, liquid outlet;

[0039] 400, exhaust assembly; 401, fixed block; 402, stamping spring; 403, triangular press block; 404, exhaust hole; 405, exhaust pipe; 406, guide rod; 407, stamping rod; 408, return spring; 409, limit block; 410, fixed rod; 411, moving block;

[0040] 500, injection component; 501, injection stopper; 502, limit rod; 503, support block; 504, telescopic spring; 505, circular stopper; 506, support rod; 507, fixed plate; 508, retraction spring; 509, ventilation small hole; 510, injection conduit; 511, injection branch pipe; 512, delay pipe. Detailed implementation manners

[0041] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0042] Refer to Figures 1-7 As shown, an injection molding device and an injection molding method for improving the injection uniformity of transformer processing include:

[0043] Refer to Figure 1, the workbench 108, on the upper surface of the workbench 108, two support columns 104 are fixedly connected. At the top of the support column 104, a support plate 116 is fixedly connected. At the lower surface of the support plate 116, two injection control cylinders 115 are fixedly connected. The output end of the injection control cylinder 115 is fixedly connected with an injection storage box 113. At the bottom of the injection storage box 113, a number of main injection pipes 111 are fixedly connected. At the bottom of the main injection pipe 111, a centrifugal box 114 is fixedly connected;

[0044] Referring to Figure 1 , Figure 4 and Figure 5 , at least one injection mechanism 200, the injection mechanism 200 is arranged to be evenly distributed along the circumference of the centrifugal box 114. The injection mechanism 200 is used for injecting the outer shell of the mutual inductor. The injection mechanism 200 includes an exhaust component 400 and an injection component 500. A lifting rod 201 is fixedly connected between the exhaust component 400 and the injection component 500. The injection component 500 includes a delay pipe 512. At the bottom of the delay pipe 512, an injection conduit 510 is fixedly connected. The injection conduit 510 is communicated with the delay pipe 512. The lower part of the delay pipe 512 is slidably connected with an injection stopper 501. The bottom end of the injection stopper 501 is a slope. At the front and rear sides of the injection stopper 501, support blocks 503 are fixedly connected. In the middle of the support block 503, a limiting rod 502 is slidably connected. The bottom end of the limiting rod 502 is fixedly connected to the surface of the delay pipe 512. A telescopic spring 504 is sleeved at the bottom of the limiting rod 502. One end of the telescopic spring 504 is fixedly connected to the support block 503, and the other end of the telescopic spring 504 is fixedly connected to the surface of the delay pipe 512;

[0045] During the initial injection, both the delay pipe 512 and the injection conduit 510 are filled with air. The injection plastic has a certain viscosity, so its flow rate is limited. When first filling the centrifugal box 114 and entering the delay pipe 512, the speeds are different in the natural state. In this way, there will be an obvious difference in the injection sequence of different injection branch pipes 511, resulting in uneven injection. In this device, the injection stopper 501 blocks the injection conduit 510. Therefore, when some of the injection plastic reaches several of the delay pipes 512 first, the injection stopper 501 blocks the injection plastic and waits until all the other delay pipes 512 are filled with the injection plastic. At this time, as the injection plastic is continuously pressurized, the injection plastic exerts a thrust on the injection stopper 501, causing the injection stopper 501 to move along the limiting rod 502. Thus, the injection plastic enters the molding mechanism 300 from the injection conduit 510 approximately at the same time. Among them, the venting small holes 509 only discharge air. Due to its viscosity, it is very difficult for the injection plastic to pass through the venting small holes 509;

[0046] Referring to Figure 1 , Figure 2 and Figure 3, a molding mechanism 300, the molding mechanism 300 is arranged on the upper surface of the working table 108, the molding mechanism 300 is used for the cooling and forming of the mutual inductor housing. The molding mechanism 300 includes a load-bearing plate 306, the load-bearing plate 306 is fixedly connected to the upper surface of the working table 108, several load-bearing rods 307 are fixedly connected to the rear side of the load-bearing plate 306, the rear ends of the load-bearing rods 307 are fixedly connected to an injection mold core 304, a mold closing ring plate 305 is fixedly connected to the middle of the injection mold core 304, two injection mold shells 303 are sleeved outside the injection mold core 304, the injection mold shells 303 are symmetrically distributed, the injection mold shells 303 and the injection mold core 304 together form an injection cavity, the inner bottom surface of the injection mold shell 303 abuts against the lower surface of the injection mold core 304, the lower surface of the injection mold shell 303 abuts against the upper surface of the working table 108, several exhaust ports 302 are formed through the top of the injection mold shell 303, several injection ports 301 are formed in the top of the injection mold shell 303, the bottom ends of the injection ports 301 are sealed, several communication grooves 308 are formed in the top plate of the injection mold shell 303, several flow dividing grooves 309 are formed in the side wall of the injection mold shell 303, the flow dividing grooves 309 are vertically arranged, several liquid outlet ports 310 are formed in the inner bottom of the injection mold shell 303, the liquid outlet ports 310 are communicated with the corresponding flow dividing grooves 309, and a communication groove 308 is provided for conducting between the flow dividing groove 309 and the corresponding injection port 301;

[0047] During injection molding, the injection plastic enters from the injection port 301, does not directly enter the injection cavity formed by the injection mold shell 303 and the injection mold core 304, but is shunted to the flow dividing groove 309 through the communication groove 308, flows to the bottom end of the flow dividing groove 309, flows out from the liquid outlet port 310, and fills the injection cavity from the bottom up of the injection cavity formed by the injection mold shell 303 and the injection mold core 304, so as to discharge the internal air from the exhaust port 302, and there will be no notch in the injection due to uneven injection.

[0048] Referring to Figure 1 and Figure 5 , specifically, a support rod 506 is slidably connected to the bottom of the injection conduit 510, a circular retaining piece 505 is fixedly connected to the top end of the support rod 506, a fixing plate 507 is fixedly connected to the bottom end of the support rod 506, a retraction spring 508 is fixedly connected to the upper surface of the fixing plate 507, the top end of the retraction spring 508 is fixedly connected to the bottom end of the injection conduit 510, and an injection branch pipe 511 is fixedly connected to the lower side surface of the injection conduit 510;

[0049] When the injection is completed and the injection branch pipe 511 rises, due to the lack of continuous injection pressure, the circular retaining piece 505 moves upward a certain distance under the action of the retraction spring 508 to block the end of the injection conduit 510, so that the injection plastic will not flow out from the injection branch pipe 511.

[0050] The bottom end of the injection mold stopper 501 is penetrated with ventilation holes 509, and the ventilation holes 509 are opened along the direction of the injection mold conduit 510.

[0051] The top of the injection storage tank 113 is fixedly connected with a liquid inlet 117. The top of the centrifugal tank 114 is fixedly connected with a centrifugal motor 112. The output end of the centrifugal motor 112 is fixedly connected with a centrifugal blade, and the centrifugal blade is arranged inside the centrifugal tank 114.

[0052] Refer to Figure 1 and Figure 6 Refer to

[0053] When the exhaust pipe 405 rises, when the punching spring 402 is compressed enough, the punching rod 407 will break through the obstruction of the moving block 411 under the action of the punching spring 402, so as to quickly discharge the air in the exhaust pipe 405, so that a small part of the injection plastic body entering the exhaust pipe 405 is discharged, avoiding the blockage of the exhaust pipe 405.

[0054] A moving block 411 is slidably connected to the right side of the exhaust pipe 405. The left side of the moving block 411 is a slope, and the left slope of the moving block 411 abuts against the triangular pressing block 403. Limiting blocks 409 are fixedly connected to both the upper and lower sides of the moving block 411. A fixing rod 410 is slidably connected to the side of the limiting block 409. The left end of the fixing rod 410 is fixedly connected to the exhaust pipe 405. A return spring 408 is sleeved on the left end of the fixing rod 410. The left end of the return spring 408 is fixedly connected to the surface of the exhaust pipe 405, and the right end of the return spring 408 is fixedly connected to the left side of the limiting block 409.

[0055] Refer to Figure 1 Refer to

[0056] Refer toFigure 1 On both sides of the upper surface of the working table 108, baffles 101 are fixedly connected. Inside the baffles 101, a number of demolding springs 102 are fixedly connected. The inner ends of the demolding springs 102 are fixedly connected with demolding guide blocks 107. A number of guide grooves 103 are formed on the upper surface of the working table 108. The bottom of the demolding guide block 107 is slidably connected in the guide groove 103. A docking rod is fixedly connected to the inner side surface of the demolding guide block 107. The docking rod supports and connects the injection molding film shell 303. The top inclined surface of the demolding guide block 107 coincides with the bottom inclined surface of the demolding press block 106.

[0057] The exhaust pipe 405 corresponds to the position of the exhaust port 302, and the size of the exhaust pipe 405 is the same as that of the exhaust port 302. The injection molding branch pipe 511 corresponds to the position of the injection molding port 301, and the size of the injection molding branch pipe 511 is the same as that of the injection molding port 301.

[0058] An injection molding method for improving the injection uniformity of current transformers includes the following steps:

[0059] Step 1: Cover the surface of the injection molding core 304 with a shielding net. The injection molding control cylinder 115 controls the demolding press block 106 to press down, and the injection molding film shell 303 is closed.

[0060] The covered shielding net is mixed with the injection molding compound and integrally formed to form a current transformer housing. The magnetic induction lines of the coil of the current transformer need to pass through the current transformer housing to form a closed circuit to form a self-inductance phenomenon, which interferes with the current transformer. The shielding net can cut off the magnetic induction lines of the coil, thus avoiding the influence of the self-inductance of the coil on the current transformer.

[0061] Step 2: The exhaust pipe 405 is docked at the exhaust port 302, and the injection molding branch pipe 511 is docked at the injection molding port 301.

[0062] Step 3: The centrifugal motor 112 drives the centrifugal blades to rotate, so that the injection molding compound is uniformly and quickly injected into the retardation pipe 512.

[0063] Step 4: The injection molding compound extrudes the injection molding stopper 501 and enters the injection molding conduit 510, and flows into the injection molding port 301 through the injection molding branch pipe 511.

[0064] Step 5: The injection molding compound is split from the injection molding port 301 into the communication groove 308, and is injection molded into the split groove 309, and flows out from the liquid outlet 310 to inject the mold cavity formed by the injection molding film shell 303 and the injection molding core 304.

[0065] Step 6: After the injection molding cooling is completed, the injection molding control cylinder 115 controls the demolding press block 106 to rise, the injection molding film shell 303 is demolded, and the circular retaining piece 505 seals the injection molding branch pipe 511.

[0066] Working principle and usage process of the present invention: By setting an injection molding mechanism 200, a molding mechanism 300, an exhaust assembly 400, and an injection assembly 500, it is possible to change the way of injection molding starting from the top of traditional injection molding equipment, avoiding the situation where part of the air inside the injection cavity of the outer shell of the mutual inductor is wrapped by the injection plastic body due to the narrow internal space of the injection cavity. Therefore, there will be no vacancy in the injection molded shell after cooling, thereby improving the overall quality of the mutual inductor. At the same time, the injection plastic body can be injected quickly and evenly under the acceleration of the centrifugal motor 112. The retardation tube 512 and its related components can ensure that the injection plastic body enters the molding mechanism 300 from multiple injection ports 301 approximately simultaneously during the initial injection molding, ensuring uniform injection molding.

[0067] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding device for improving the injection uniformity of transformers, characterized in that, it includes: An operation table (108), on the upper surface of the operation table (108), two support columns (104) are fixedly connected. The top of the support column (104) is fixedly connected with a support plate (116). On the lower surface of the support plate (116), two injection molding control cylinders (115) are fixedly connected. The output end of the injection molding control cylinder (115) is fixedly connected with an injection molding storage box (113). The bottom of the injection molding storage box (113) is fixedly connected with a plurality of main injection pipes (111). The bottom of the main injection pipe (111) is fixedly connected with a centrifugal box (114); At least one injection molding mechanism (200), which is evenly arranged along the circumference of the centrifugal box (114). The injection molding mechanism (200) is used for injecting the transformer housing. The injection molding mechanism (200) includes an exhaust component (400) and an injection molding component (500). A lifting rod (201) is fixedly connected between the exhaust component (400) and the injection molding component (500). The injection molding component (500) includes a delay pipe (512). The bottom of the delay pipe (512) is fixedly connected with an injection molding conduit (510). The injection molding conduit (510) is communicated with the delay pipe (512). A part below the delay pipe (512) is slidably connected with an injection molding block (501). The bottom end of the injection molding block (501) is a slope. Support blocks (503) are fixedly connected to both the front and rear sides of the injection molding block (501). A limiting rod (502) is slidably connected to the middle of the support block (503). The bottom end of the limiting rod (502) is fixedly connected to the surface of the delay pipe (512). A telescopic spring (504) is sleeved on the bottom of the limiting rod (502). One end of the telescopic spring (504) is fixedly connected to the support block (503), and the other end of the telescopic spring (504) is fixedly connected to the surface of the delay pipe (512); The molding mechanism (300) is arranged on the upper surface of the working table (108). The molding mechanism (300) is used for the cooling and forming of the current transformer housing. The molding mechanism (300) includes a load-bearing plate (306). The load-bearing plate (306) is fixedly connected to the upper surface of the working table (108). A plurality of load-bearing rods (307) are fixedly connected to the rear side of the load-bearing plate (306). The rear ends of the load-bearing rods (307) are fixedly connected to an injection mold core (304). A mold closing ring plate (305) is fixedly connected to the middle of the injection mold core (304). Two injection mold shells (303) are sleeved outside the injection mold core (304). The injection mold shells (303) are symmetrically distributed. The injection mold shells (303) and the injection mold core (304) together form an injection cavity. The inner bottom surface of the injection mold shell (303) abuts against the lower surface of the injection mold core (304). The lower surface of the injection mold shell (303) abuts against the upper surface of the working table (108). A plurality of exhaust ports (302) are penetrated and opened at the top of the injection mold shell (303). A plurality of injection ports (301) are opened at the top of the injection mold shell (303). The bottom ends of the injection ports (301) are sealed. A plurality of communication grooves (308) are opened in the top plate of the injection mold shell (303). A plurality of flow dividing grooves (309) are opened in the side wall of the injection mold shell (303). The flow dividing grooves (309) are vertically arranged. A plurality of liquid outlets (310) are opened at the inner bottom of the injection mold shell (303). The liquid outlets (310) are communicated with the corresponding flow dividing grooves (309). A communication groove (308) is conducted between the flow dividing groove (309) and the corresponding injection port (301). The bottom of the injection conduit (510) is slidably connected to a support rod (506). The top end of the support rod (506) is fixedly connected to a circular retaining piece (505). The bottom end of the support rod (506) is fixedly connected to a fixing plate (507). A retraction spring (508) is fixedly connected to the upper surface of the fixing plate (507). The top end of the retraction spring (508) is fixedly connected to the bottom end of the injection conduit (510). An injection branch pipe (511) is fixedly connected to the lower side surface of the injection conduit (510). L-shaped rods (105) are fixedly connected to both sides of the injection storage tank (113). A mold splitting pressing block (106) is fixedly connected to the bottom of the L-shaped rod (105). Baffles (101) are fixedly connected to both sides of the upper surface of the working table (108). A plurality of mold splitting springs (102) are fixedly connected to the inner side of the baffle (101). The inner ends of the mold splitting springs (102) are fixedly connected to mold splitting guide blocks (107). A plurality of guide grooves (103) are opened on the upper surface of the working table (108). The bottom of the mold splitting guide block (107) is slidably connected in the guide groove (103). A docking rod is fixedly connected to the inner side surface of the mold splitting guide block (107). The docking rod supports and connects the injection mold shell (303). The inclined surface at the top of the mold splitting guide block (107) coincides with the inclined surface at the bottom of the mold splitting pressing block (106).

2. An injection molding device for improving the injection uniformity in the processing of current transformers according to claim 1, characterized in that: The bottom end of the injection block (501) is provided with vent holes (509) running through it, and the vent holes (509) are arranged along the direction of the injection conduit (510).

3. An injection molding device for improving the injection uniformity in the processing of transformers according to claim 1, characterized in that: The top of the injection storage tank (113) is fixedly connected to a liquid inlet (117), the top of the centrifugal tank (114) is fixedly connected to a centrifugal motor (112), the output end of the centrifugal motor (112) is fixedly connected to a centrifugal blade, and the centrifugal blade is arranged inside the centrifugal tank (114).

4. An injection molding device for improving the injection uniformity in the processing of transformers according to claim 1, characterized in that: Two suspension rods (109) are fixedly connected to the lower surface of the support plate (116), the bottom of the suspension rods (109) is fixedly connected to an annular plate (110), and a plurality of exhaust components (400) are installed at the bottom of the annular plate (110). The plurality of exhaust components (400) are evenly distributed along the circumference of the annular plate (110). The exhaust component (400) includes a fixed block (401), the fixed block (401) is fixedly connected to the lower surface of the annular plate (110), a guide rod (406) is slidably connected to the middle of the fixed block (401), the guide rod (406) is slidably connected to the annular plate (110), the bottom end of the guide rod (406) is fixedly connected to a punching rod (407), a punching spring (402) is sleeved on the lower part of the guide rod (406), the top end of the punching spring (402) is fixedly connected to the lower surface of the fixed block (401), the bottom end of the punching spring (402) is fixedly connected to the top of the punching rod (407), the lower part of the punching rod (407) is slidably connected to an exhaust pipe (405), two exhaust holes (404) are arranged on the side of the exhaust pipe (405), the bottom end of the punching rod (407) is fixedly connected to a triangular pressing block (403), and a lifting rod (201) is fixedly connected to the outside of the exhaust pipe (405).

5. An injection molding device for improving the injection uniformity in the processing of transformers according to claim 4, characterized in that: A moving block (411) is slidably connected to the right side of the exhaust pipe (405). The left side of the moving block (411) is a slope, and the left slope of the moving block (411) abuts against the triangular pressing block (403). Limit blocks (409) are fixedly connected to both the upper and lower sides of the moving block (411). A fixed rod (410) is slidably connected to the side of the limit block (409). The left end of the fixed rod (410) is fixedly connected to the exhaust pipe (405). A return spring (408) is sleeved on the left end of the fixed rod (410). The left end of the return spring (408) is fixedly connected to the surface of the exhaust pipe (405), and the right end of the return spring (408) is fixedly connected to the left side of the limit block (409).

6. An injection molding device for improving the injection uniformity in the processing of transformers according to claim 4, characterized in that: The exhaust pipe (405) corresponds to the exhaust port (302) in position, and the size of the exhaust pipe (405) is the same as that of the exhaust port (302). The injection molding branch pipe (511) corresponds to the injection molding port (301) in position, and the size of the injection molding branch pipe (511) is the same as that of the injection molding port (301).

7. An injection molding method for improving the injection uniformity of mutual inductors, applicable to the injection molding device for improving the injection uniformity of mutual inductors according to any one of claims 1-6 Characterized in that It includes the following steps: Step 1: Cover a shielding net on the surface of the injection molding core (304), and the injection molding control cylinder (115) controls the downward pressure of the split mold pressing block (106) to close the injection molding shell (303). Step 2: Connect the exhaust pipe (405) to the exhaust port (302), and connect the injection molding branch pipe (511) to the injection molding port (301). Step 3: The centrifugal motor (112) drives the centrifugal blades to rotate, so that the injection plastic is uniformly and quickly injected into the retardation pipe (512). Step 4: The injection plastic extrudes the injection molding stopper (501) and enters the injection molding conduit (510), and flows into the injection molding port (301) through the injection molding branch pipe (511). Step 5: The injection plastic is split from the injection molding port (301) into the communication groove (308), and is injection molded into the split groove (309), and flows out from the liquid outlet (310) to inject the mold cavity formed by the injection molding shell (303) and the injection molding core (304). Step 6: After the injection molding cooling is completed, the injection molding control cylinder (115) controls the split mold pressing block (106) to rise, the injection molding shell (303) is split, and the circular baffle (505) seals the injection molding branch pipe (511).

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