Injection molding device for processing automobile parts

Abstract

The invention discloses an injection molding device for processing automobile parts, which belongs to the technical field of injection molding equipment, and comprises a bottom mold and a top mold which cooperates with the bottom mold to form a cavity, a support is installed on the top mold, a mounting groove which cooperates with the top mold is provided on the support, a cavity is provided in the support, an injection molding tube is provided in the cavity, a first end of the injection molding tube is fixedly connected with a discharge pipe of an injection molding machine, a second end of the injection molding tube is closed, a plurality of blanking ports are arranged side by side along the extending direction of the injection molding tube, a plurality of T-shaped pipe sleeves corresponding to the blanking ports are slidably installed on the injection molding tube, a horizontal section of the T-shaped pipe sleeve is sleeved on the injection molding tube, a bottom end of a vertical section of the T-shaped pipe sleeve is fitted with a bottom wall of the cavity, a sliding T-shaped pipe sleeve can open or close the blanking port, a plurality of through holes corresponding to the blanking ports are provided on the bottom wall of the support, and a plurality of discharge ports corresponding to the through holes are provided on the top mold. The invention can avoid the formation of a jet to cause turbulence on the inner wall of the mold, thereby ensuring the molding quality.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding equipment, and in particular relates to an injection molding device for processing automobile parts. Background Art

[0002] The injection molding process refers to the process of making molten raw materials into semi-finished products of a certain shape through operations such as pressurization, injection, cooling, and separation. The injection molding process of plastic parts mainly includes: mold closing-filling-pressure holding-cooling-mold opening-mold demoulding.

[0003] In the injection molding process of automotive parts, a higher injection pressure is required to ensure that the mold cavity is completely filled. When the injection pressure is high, the injection speed will increase accordingly. After the plastic enters the cavity, it will form a jet under the condition of high injection speed, causing the injected plastic to splash onto the inner wall of the mold and generate turbulence, resulting in a wavy serpentine pattern on the surface of the molded part, which affects the molding quality of the injection molded part.

[0004] Therefore, it is necessary to propose an injection molding device for automobile parts processing to solve the above problems. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an injection molding device for processing automobile parts, which is used to solve the problem in the prior art that during the molding process of injection molded parts, the injection material generates turbulence and affects the molding quality.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an injection molding device for processing automobile parts, comprising a bottom mold and a top mold that cooperates with the bottom mold to form a mold cavity, a support is installed on the top mold, a mounting groove that cooperates with the top mold is provided on the support, a cavity is provided in the support, an injection molding component is provided in the cavity, the injection molding component comprises an injection molding tube, a first end of the injection molding tube is fixedly connected to a discharge pipe of an injection molding machine, a second end of the injection molding tube is closed, a plurality of blanking ports are arranged side by side on the injection molding tube along an extension direction of the injection molding tube, and a sliding mounting is provided on the injection molding tube. There are multiple T-shaped tube sleeves corresponding to the blanking ports one by one, the horizontal section of the T-shaped tube sleeve is sleeved on the injection molding tube, the bottom end of the vertical section of the T-shaped tube sleeve is fitted with the bottom wall of the cavity, and the sliding of the T-shaped tube sleeve can open or close the blanking port, the bottom wall of the support is provided with multiple through holes corresponding to the blanking ports one by one, and the top mold is provided with multiple discharge ports corresponding to the through holes one by one, and the discharge ports are connected with the cavity. Sliding the T-shaped tube sleeve to open the blanking port can make the injection plastic flow into the cavity along the blanking port, the T-shaped tube sleeve, the through holes, and the discharge port in sequence.

[0008] Furthermore, a slide plate is slidably installed in the injection molding tube near the second end of the injection molding tube, a first spring is fixedly connected between the slide plate and the inner wall of the second end of the injection molding tube, a U-shaped connecting frame is fixedly connected to one side of the slide plate, a plurality of T-shaped pipe sleeves are connected as a whole through a connecting rod, a first arm of the U-shaped connecting frame extends out of the injection molding tube and is slidably connected to the injection molding tube, a second arm of the U-shaped connecting frame is fixedly connected to the connecting rod, and sliding the slide plate can drive the plurality of T-shaped pipe sleeves to slide synchronously through the U-shaped connecting frame to open or close the blanking port.

[0009] Furthermore, the bottom wall of the support is provided with a plurality of annular grooves respectively arranged around the through holes, a limiting ring is slidably installed in the annular groove, a second spring is fixedly connected between the limiting ring and the bottom wall of the annular groove, the limiting ring can surround the vertical section of the T-shaped pipe sleeve, the outer peripheral wall of the limiting ring is provided with an inclined edge, and when the T-shaped pipe sleeve slides to open the blanking port, the vertical section of the T-shaped pipe sleeve can squeeze the inclined edge of the limiting ring to make the limiting ring slide into the annular groove.

[0010] Furthermore, the top mold is provided with a plurality of gates connected one by one with the discharge port, a mounting block capable of blocking the discharge port is installed in the discharge port, a blocking block capable of blocking the gate is slidably installed in the discharge port, and a third spring is fixedly connected between the blocking block and the mounting block.

[0011] Furthermore, the mounting block is threadedly connected to the discharge port.

[0012] Furthermore, a gear is fixedly installed at the injection molding tube extending from the first arm of the U-shaped connecting frame, and a rack meshing with multiple gears is slidably installed in the cavity. Sliding the rack can rotate the gear so that the U-shaped connecting frame drives the T-shaped pipe sleeve to rotate, so that the vertical section of the T-shaped pipe sleeve is misaligned with the through hole.

[0013] An implementation method of an injection molding device for processing automobile parts comprises the following steps:

[0014] S1: driving the top mold and the bottom mold to close together to form a cavity, and starting the heating mechanism to heat the cavity in the support installed on the top mold to a preset temperature;

[0015] S2: The sliding rack drives the gear to rotate so that the multiple U-shaped connecting frames drive the T-shaped pipe sleeve to rotate to the first limit position, so that the vertical section of the T-shaped pipe sleeve can correspond to the through hole;

[0016] S3: Start the injection molding machine to make the injection plastic flow into the injection molding tube, and the injection plastic pushes the slide plate to drive the multiple T-shaped tube sleeves to move synchronously to open the blanking port, so that the injection plastic flows into the blanking port and pushes the blocking block to open the gate, so that the injection plastic can flow from the gate into the mold cavity, wherein, when the vertical section of the T-shaped tube sleeve moves to correspond to the through hole, the limit ring is moved to the side close to the vertical section of the T-shaped tube sleeve by the elastic force of the second spring to surround the vertical section of the T-shaped tube sleeve;

[0017] S4: After the injection molding is completed, the injection plastic remaining in the injection molding tube is extracted through the pump body, and then the plurality of limit rings are pressed back into the annular groove, and then the sliding rack drives the gear to rotate so that the plurality of U-shaped connecting frames drive the T-shaped pipe sleeve to rotate to the second limit position, so that the vertical section of the T-shaped pipe sleeve is misaligned with the through hole;

[0018] S5: After the temperature raising mechanism is closed and the cavity is air-cooled for a preset time, cooling water is injected into the injection tube through the water injection mechanism so that the cooling water can be discharged from the vertical section of the T-shaped sleeve into the cavity, and the drain port on the support connected to the cavity is opened to circulate the cooling water;

[0019] S6: After cooling, the support is separated from the top mold, the water in the cavity is discharged, and the demoulding operation is performed.

[0020] The beneficial effects of the present invention are:

[0021] The present invention starts a heating mechanism to keep the temperature in the cavity at a preset temperature before injection molding, reduces the viscosity of the injection plastic by heating, and allows the injection plastic to flow into the injection tube and maintain good fluidity at a lower injection speed. The preset temperature can reduce the friction between the injection plastic and the inner wall of the cavity, and the hot runner can reduce the cooling of the injection plastic before entering the cavity, thereby reducing turbulence. During the injection molding process, the design of multiple discharge ports disperses the injection pressure and reduces the speed at which the injection plastic flows out of each discharge port. The blocking block is provided to buffer the injection plastic in the discharge port to slow down the injection speed, reduce the force of the injection plastic hitting the mold wall, and thus reduce turbulence. The design of the T-shaped pipe sleeve allows the injection plastic to flow into the cavity evenly at the same time, thereby ensuring molding quality. After the injection molding is completed, cooling water flows evenly into the cavity from the T-shaped pipe sleeve, thereby ensuring cooling uniformity and avoiding warping or deformation of the molded part, thereby ensuring molding quality.

[0022] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0024] Figure 1 is a cross-sectional view of a top mold and a support according to an embodiment of the present invention;

[0025] Figure 2 For the embodiment of the present invention Figure 1 A magnified view of the part A in the middle;

[0026] Figure 3 This is a schematic diagram of the internal structure of the cavity according to an embodiment of the present invention;

[0027] Figure 4 Schematic diagram of the cooperation between the bottom mold and the top mold in an embodiment of the present invention.

[0028] The markings in the accompanying drawings are as follows: bottom mold 1, top mold 2, discharge port 201, gate 202, mounting block 203, blocking block 204, third spring 205, support 3, mounting groove 301, cavity 302, through hole 303, annular groove 304, limiting ring 305, second spring 306, injection molding component 4, injection molding tube 401, blanking port 402, T-shaped sleeve 403, slide plate 404, first spring 405, U-shaped connecting frame 406, connecting rod 407, gear 408, rack 409. DETAILED DESCRIPTION

[0029] like Figures 1 to 4As shown, the present invention provides an injection molding device for processing automobile parts, comprising: a bottom mold 1 and a top mold 2 that cooperates with the bottom mold 1 to form a cavity, a support 3 is installed on the top mold 2, and a mounting groove 301 that cooperates with the top mold 2 is provided on the support 3, so that the top mold 2 can be installed in the mounting groove 301, a cavity 302 is provided in the support 3, and an injection molding component 4 is provided in the cavity 302, and the injection molding component 4 includes an injection molding tube 401, a first end of the injection molding tube 401 is fixedly connected to a discharge pipe of an injection molding machine, and a second end of the injection molding tube 401 is closed, a plurality of blanking ports 402 are arranged side by side on the injection molding tube 401 along the extension direction of the injection molding tube 401, and a plurality of blanking ports 402 are slidably installed on the injection molding tube 401. A plurality of T-shaped tube sleeves 403 corresponding one to one with the blanking opening 402, the horizontal section of the T-shaped tube sleeve 403 is sleeved on the injection tube 401, and the bottom end of the vertical section of the T-shaped tube sleeve 403 is fitted with the bottom wall of the cavity 302, and sliding the T-shaped tube sleeve 403 can make the T-shaped tube sleeve 403 open or close the blanking opening 402, the bottom wall of the support 3 is provided with a plurality of through holes 303 corresponding one to one with the blanking opening 402, and the top mold 2 is provided with a plurality of discharge ports 201 corresponding one to one with the through holes 303, so that the discharge ports 201 are connected with the cavity, and sliding the T-shaped tube sleeve 403 to open the blanking opening 402 can make the injection plastic flow from the blanking opening 402 to the T-shaped tube sleeve 403 and flow out from the discharge port 201 into the cavity. When the vertical section of the T-shaped tube sleeve 403 is connected to the blanking port 402 and the through hole 303 , the injection plastic can flow out from the discharge port 201 ; when the vertical section of the T-shaped tube sleeve 403 is misaligned with the blanking port 402 and the through hole 303 , the injection plastic is enclosed in the injection tube 401 .

[0030] In this solution, before injection molding, the T-shaped tube sleeve 403 is set to close the blanking port 402 to make the injection tube 401 in a closed state. During the injection molding process, the injection molding machine injects the injection plastic from the discharge pipe into the injection tube 401. When the injection tube 401 is filled with the injection plastic, the T-shaped pipe 403 is slid so that the vertical section of the T-shaped pipe 403 corresponds to the blanking port 402 and the through hole 303. At this time, the injection plastic can flow into the discharge port 201.

[0031] In the present solution, multiple discharge ports 201 are provided, and multiple T-shaped pipe sleeves 403 slide simultaneously to connect the corresponding blanking ports 402 and discharge ports 201, so that the injection plastic flows out of multiple discharge ports 201 simultaneously, thereby ensuring the uniformity of the injection plastic flow out and improving the molding quality; and through the design of multiple discharge ports 201, the injection pressure is dispersed, the speed at which the injection plastic flows out of each discharge port 201 is reduced, and the formation of a jet to cause turbulence on the inner wall of the mold is avoided, thereby ensuring the molding quality.

[0032] In one embodiment of the present invention, a slide plate 404 is slidably installed inside the injection molding tube 401 near the second end side of the injection molding tube 401, and a first spring 405 is fixedly connected between the slide plate 404 and the inner wall of the second end of the injection molding tube 401, and a U-shaped connecting frame 406 capable of extending out of the injection molding tube 401 is fixedly connected to one side of the slide plate 404, and a plurality of T-shaped pipe sleeves 403 are connected as a whole through a connecting rod 407, wherein the first arm of the U-shaped connecting frame 406 is slidably connected to the injection molding tube 401, and the second arm of the U-shaped connecting frame 406 is fixedly connected to the connecting rod 407, and sliding the slide plate 404 can drive the plurality of T-shaped pipe sleeves 403 to slide synchronously through the U-shaped connecting frame 406 to open or close the blanking port 402.

[0033] In this solution, before the injection plastic fills the injection tube 401, the T-shaped tube sleeve 403 is set to close the blanking port 402. After the injection plastic fills the injection tube 401, continuing to inject the injection plastic can push the slide plate 404 to slide, thereby compressing the first spring 405 and driving the U-shaped connecting frame 406 and the connecting rod 407 to slide synchronously, thereby causing multiple T-shaped tube sleeves 403 to slide synchronously to open the blanking port 402.

[0034] In this solution, there is no need to apply power to the sliding of the T-shaped tube sleeve 403 separately. The T-shaped tube sleeve 403 is pushed to slide to open the blanking port 402 only by the injection of the injection material during the injection molding process.

[0035] In one embodiment of the present invention, the bottom wall of the support 3 is provided with a plurality of annular grooves 304 respectively arranged around the through holes 303, a limiting ring 305 is slidably installed in the annular groove 304, a second spring 306 is fixedly connected between the limiting ring 305 and the bottom wall of the annular groove 304, the limiting ring 305 cooperates with the vertical section of the T-shaped pipe sleeve 403, and the outer peripheral wall of the limiting ring 305 is provided with an inclined edge.

[0036] In the present solution, when the vertical section of the T-shaped tube sleeve 403 is misaligned with the through hole 303 to close the blanking port 402, the limiting ring 304 extends the annular groove 304 under the action of the second spring 306, and when the T-shaped tube sleeve 403 slides to open the blanking port 402, the vertical section of the T-shaped tube sleeve 403 squeezes the inclined edge of the limiting ring 305, so that the limiting ring 305 slides into the annular groove 304, and when the T-shaped tube sleeve 403 moves to the inner side of the limiting ring 305 to cooperate with the through hole 303, the limiting ring 305 moves upward under the elastic force of the second spring 306 to surround the vertical section of the T-shaped tube sleeve 403, thereby ensuring the stability and sealing of the T-shaped tube sleeve 403 during the casting process, and preventing the injection plastic from flowing into the cavity 302.

[0037] In one embodiment of the present invention, the top mold 2 is provided with a plurality of gates 202 connected one by one with the discharge port 201, the discharge port 201 is installed with a mounting block 203 capable of blocking the discharge port 201, the discharge port 201 is slidably installed with a blocking block 204 capable of blocking the gate 202, and a third spring 205 is fixedly connected between the blocking block 204 and the mounting block 203.

[0038] In this solution, before the injection plastic flows into the discharge port 201, the blocking block 204 is set to close the gate 202. After the injection plastic flows into the discharge port 201, the blocking block 204 is squeezed by the injection pressure to compress the third spring 205. The blocking block 204 is squeezed and slides to open the gate 202, so that the injection plastic can flow out of the gate 202 into the cavity.

[0039] In this solution, the blocking block 204 is provided to buffer the injection plastic in the discharge port 201 to slow down the injection speed, thereby reducing the force of the injection plastic hitting the mold wall, thereby reducing turbulence.

[0040] In one embodiment of the present invention, the mounting block 203 is threadedly connected to the discharge port 201 to facilitate cleaning of the discharge port 201 after installation and disassembly.

[0041] In one embodiment of the present invention, a support 3 is installed on the bottom mold 1, and the support 3 is also provided with an injection molding component 4.

[0042] In one embodiment of the present invention, a gear 408 is fixedly installed on the first arm of the U-shaped connecting frame 406, and a rack 409 meshing with multiple gears 408 is limitedly installed in the cavity 302 for sliding. Sliding the rack 409 can rotate the gear 408 so that the U-shaped connecting frame 406 drives the T-shaped sleeve 403 to rotate, so that the vertical section of the T-shaped sleeve 403 is misaligned with the through hole 303. Furthermore, a driving rod (not shown in the figure) is connected to one end of the rack 409, and the driving rod extends out of the cavity 302 away from the end of the rack 409 to the outside of the support 3, and is fixedly connected to a driving cylinder (not shown in the figure) for outputting linear motion. The driving rod is sealed and slidably connected to the support 3, and starting the driving cylinder can drive the rack 409 to slide through the driving rod, wherein when the output end of the driving cylinder is in the first limit position, the vertical section of the T-shaped pipe sleeve 403 can correspond to the through hole 303, and when the output end of the driving cylinder is in the second limit position, the vertical section of the T-shaped pipe sleeve 403 is misaligned with the through hole 303.

[0043] In one embodiment of the present invention, a plurality of limit rings 305 are connected as a whole via a connecting plate. When the T-shaped tube sleeve 403 needs to be returned to close the blanking opening 402, the plurality of limit rings 305 can be returned to the annular groove 304 by pressing the connecting plate to facilitate the sliding return of the T-shaped tube sleeve 403.

[0044] An implementation method of an injection molding device for processing automobile parts comprises the following steps:

[0045] S1: driving the top mold 2 and the bottom mold 1 to close together to form a cavity, and starting the heating mechanism to heat the cavity 302 in the support 3 installed on the top mold 2 to a preset temperature;

[0046] S2: The sliding rack 409 drives the gear 408 to rotate so that the multiple U-shaped connecting frames 406 drive the T-shaped pipe sleeve 403 to rotate to the first limit position, at which time the vertical section of the T-shaped pipe sleeve 403 can correspond to the through hole 303;

[0047] S3: Start the injection molding machine to make the injection plastic flow into the injection molding tube 401, and the injection plastic pushes the slide plate 404 to drive the multiple T-shaped tube sleeves 403 to move synchronously to open the blanking port 402, so that the injection plastic flows into the blanking port 402 to push the blocking block 204 to open the gate 202, so that the injection plastic can flow into the mold cavity from the gate 202; wherein, when the vertical section of the T-shaped tube sleeve 403 moves to correspond to the through hole 303, the limiting ring 305 is moved to the side close to the vertical section of the T-shaped tube sleeve 403 by the elastic force of the second spring 306 to surround the vertical section of the T-shaped tube sleeve 403;

[0048] S4: After the injection molding is completed, the injection plastic remaining in the injection molding tube 401 is extracted by the pump body. During the extraction process, the blocking block 204 can close the gate 202 due to the suction force, thereby preventing the injection plastic in the cavity from flowing back, and then the multiple limit rings 305 are pressed back into the annular groove 304, and then the sliding rack 409 drives the gear 408 to rotate so that the multiple U-shaped connecting frames 406 drive the T-shaped pipe sleeve 403 to rotate to the second limit position. At this time, the vertical section of the T-shaped pipe sleeve 403 is misaligned with the through hole;

[0049] S5: After the temperature raising mechanism is closed and the cavity 302 is air-cooled for a preset time, cooling water is injected into the injection tube 401 through the water injection mechanism so that the cooling water can be discharged from the vertical section of the T-shaped pipe sleeve 403 into the cavity 302, and the drain port on the support 3 connected with the cavity 302 is opened to circulate the cooling water;

[0050] S6: After cooling, the support 3 is separated from the top mold 2, the water in the cavity 302 is discharged, and the demoulding operation is performed.

[0051] In this solution, before injection molding, the temperature in the cavity 302 is maintained at a preset temperature by starting the heating mechanism. By heating, the viscosity of the injection plastic is reduced, so that the injection plastic flows into the injection tube 401 and maintains good fluidity at a lower injection speed. The preset temperature can reduce the friction between the injection plastic and the inner wall of the cavity, and the hot runner can reduce the cooling of the injection plastic before entering the cavity, thereby reducing turbulence. During the injection molding process, the design of multiple discharge ports 201 disperses the injection pressure and reduces the injection plastic from each discharge port. The outflow speed of the outlet 201 and the buffering effect of the injection plastic in the outlet 201 by setting the blocking block 204 to slow down the injection speed can reduce the force of the injection plastic hitting the mold wall, thereby reducing turbulence, and through the design of the T-shaped pipe sleeve 403, the injection plastic can flow into the cavity at the same time and evenly, ensuring the molding quality; after the injection molding is completed, the cooling water flows evenly into the cavity 302 through the T-shaped pipe sleeve 304, ensuring the uniformity of cooling, avoiding warping or deformation of the molded part, thereby ensuring the molding quality.

[0052] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An injection molding device for processing automobile parts, comprising a bottom mold and a top mold that cooperates with the bottom mold to form a cavity, characterized in that: The top mold is provided with a support, the support is provided with a mounting groove which cooperates with the top mold, the support is provided with a cavity, the cavity is provided with an injection molding component, the injection molding component includes an injection molding tube, the first end of the injection molding tube is fixedly connected to the discharge pipe of the injection molding machine, the second end of the injection molding tube is closed, the injection molding tube is provided with a plurality of blanking openings arranged side by side along the extension direction of the injection molding tube, the injection molding tube is slidably provided with a plurality of T-shaped pipe sleeves which correspond to the blanking openings one by one, the horizontal section of the T-shaped pipe sleeve is sleeved on the injection molding tube, the bottom end of the vertical section of the T-shaped pipe sleeve is fitted with the bottom wall of the cavity, the T-shaped pipe sleeve can be slid to open or close the blanking opening, the bottom wall of the support is provided with a plurality of through holes which correspond to the blanking openings one by one, the top mold is provided with a plurality of discharge openings which correspond to the through holes one by one, the discharge opening is communicated with the cavity, and the T When the blanking port is opened by the T-shaped tube sleeve, the injection plastic can flow into the mold cavity along the blanking port, the T-shaped tube sleeve, the through hole and the discharge port in sequence; wherein, when the vertical section of the T-shaped tube sleeve is connected to the blanking port and the through hole, the injection plastic can flow out from the discharge port, and when the vertical section of the T-shaped tube sleeve is misaligned with the blanking port and the through hole, the injection plastic is enclosed in the injection tube; a slide plate is slidably installed in the injection tube near the second end side of the injection tube, a first spring is fixedly connected between the slide plate and the inner wall of the second end of the injection tube, a U-shaped connecting frame is fixedly connected to one side of the slide plate, a plurality of T-shaped tube sleeves are connected as a whole by a connecting rod, a first arm of the U-shaped connecting frame extends out of the injection tube and is slidably connected to the injection tube, a second arm of the U-shaped connecting frame is fixedly connected to the connecting rod, and sliding the slide plate can drive a plurality of T-shaped tube sleeves to slide synchronously through the U-shaped connecting frame to open or close the blanking port.

2. The injection molding device for automobile parts processing according to claim 1, characterized in that: The bottom wall of the support is provided with a plurality of annular grooves respectively arranged around the through holes, and a limit ring is slidably installed in the annular groove, and a second spring is fixedly connected between the limit ring and the bottom wall of the annular groove, and the limit ring can surround the vertical section of the T-shaped pipe sleeve, and the outer peripheral wall of the limit ring is provided with an inclined edge, and when the T-shaped pipe sleeve slides to open the blanking port, the vertical section of the T-shaped pipe sleeve can squeeze the inclined edge of the limit ring to make the limit ring slide into the annular groove; wherein, the plurality of limit rings are connected as a whole by a connecting plate, and when it is necessary to return the T-shaped pipe sleeve to close the blanking port, the plurality of limit rings can be returned to the annular groove by pressing the connecting plate.

3. The injection molding device for automobile parts processing according to claim 2, characterized in that: The top mold is provided with a plurality of gates connected one by one with the discharge ports, a mounting block capable of blocking the discharge ports is installed in the discharge ports, a blocking block capable of blocking the gates is slidably installed in the discharge ports, and a third spring is fixedly connected between the blocking block and the mounting block.

4. The injection molding device for automobile parts processing according to claim 3, characterized in that: The mounting block is threadedly connected to the discharge port.

5. The injection molding device for automobile parts processing according to claim 4, characterized in that: A gear is fixedly installed at the injection tube extending from the first arm of the U-shaped connecting frame, and a rack meshing with multiple gears is slidably installed in the cavity. Sliding the rack can rotate the gear so that the U-shaped connecting frame drives the T-shaped pipe sleeve to rotate, so that the vertical section of the T-shaped pipe sleeve is misaligned with the through hole.

6. The implementation method of the injection molding device for automobile parts processing according to claim 5 is characterized in that: The following steps are involved: S1: driving the top mold and the bottom mold to close together to form a cavity, and starting the heating mechanism to heat the cavity in the support installed on the top mold to a preset temperature; S2: The sliding rack drives the gear to rotate so that the multiple U-shaped connecting frames drive the T-shaped pipe sleeve to rotate to the first limit position, so that the vertical section of the T-shaped pipe sleeve can correspond to the through hole; S3: Start the injection molding machine to make the injection plastic flow into the injection molding tube, and the injection plastic pushes the slide plate to drive the multiple T-shaped tube sleeves to move synchronously to open the blanking port, so that the injection plastic flows into the blanking port and pushes the blocking block to open the gate, so that the injection plastic can flow from the gate into the mold cavity, wherein, when the vertical section of the T-shaped tube sleeve moves to correspond to the through hole, the limit ring is moved to the side close to the vertical section of the T-shaped tube sleeve by the elastic force of the second spring to surround the vertical section of the T-shaped tube sleeve; S4: After the injection molding is completed, the injection plastic remaining in the injection molding tube is extracted through the pump body, and then the plurality of limit rings are pressed back into the annular groove, and then the sliding rack drives the gear to rotate so that the plurality of U-shaped connecting frames drive the T-shaped pipe sleeve to rotate to the second limit position, so that the vertical section of the T-shaped pipe sleeve is misaligned with the through hole; S5: After the temperature raising mechanism is closed and the cavity is air-cooled for a preset time, cooling water is injected into the injection tube through the water injection mechanism so that the cooling water can be discharged from the vertical section of the T-shaped sleeve into the cavity, and the drain port on the support connected to the cavity is opened to circulate the cooling water; S6: After cooling, the support is separated from the top mold, the water in the cavity is discharged, and the demoulding operation is performed.

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