Injection mold and machining method for automobile front bumper grille

Abstract

The invention discloses an injection mold for an automobile front bumper grille, and relates to the technical field of mold injection molding, the injection mold comprises a mold assembly, a heat storage assembly, a transmission assembly and a demolding assembly, the mold assembly comprises a static mold and a dynamic mold, and the top of the static mold and the top of the dynamic mold are each provided with a plurality of cooling channels. The air pump is started to enable normal-temperature air to enter each cooling channel, so that high-temperature air in a forming cavity of a mold is conveyed into the heat storage box, a temperature sensor detects different temperatures, hot air is conveyed into different air paths, when the high-heat air enters the first-stage air path, the high-heat air enters the corresponding preheating channel, and when the high-temperature air passes through the preheating channel, the high-temperature air enters the second-stage air path. And the injection mold can be preheated by utilizing high temperature generated by injection molding, so that the problems of low energy utilization efficiency and waste at present are solved.

Description

Technical Field

[0001] This invention relates to the field of mold injection molding technology, specifically to an injection mold and processing method for an automotive front bumper grille. Background Technology

[0002] The front bumper grille, also known as the front grille, is a hollow mesh or strip structure component installed on the front bumper of a car. It is one of the core components of the car's front face design, and it serves multiple functions such as air intake and heat dissipation, protective transition, airflow optimization, and decorative aesthetics. The material of the front bumper grille is mainly modified polypropylene, which is lightweight, rigid, impact-resistant, and easy to mold. Its processing method is injection molding.

[0003] In existing technologies, during the mold processing stage of automotive front grille injection molds, cooling airflow carries away the heat generated inside the mold due to injection and raises the temperature of the gas. However, this heated airflow is usually lost directly and is not recovered. When the mold is used in a low-temperature environment, in order to avoid defects such as uneven gloss and obvious weld lines on the surface of the finished grille caused by excessively low local temperatures, it is necessary to rely on a separate preheating device to heat the mold. However, the current preheating device is set up independently. Therefore, the waste of unrecovered heat and the energy consumption of the independent preheating device become shortcomings of unreasonable energy use. This not only causes the idle loss of heat energy resources during the mold heat dissipation process, but also increases the additional energy input under low-temperature conditions, resulting in inefficient and wasteful energy utilization.

[0004] Therefore, we propose an injection mold and processing method for automotive front grille to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold and processing method for a front bumper grille of an automobile, so as to solve the problem of inefficient and wasteful energy utilization caused by the independent setting of the preheating equipment for injection molds as mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection mold for an automotive front bumper grille, comprising a mold assembly, a heat storage assembly, a transmission assembly, and a demolding assembly. The mold assembly includes a static mold and a dynamic mold. Multiple cooling channels are provided on the top of both the static and dynamic molds. Multiple preheating channels are provided on the outer surfaces of both the static and dynamic molds. The heat storage assembly includes a heat storage box. A grading cavity is fixedly embedded on one side of the heat storage box. A primary air path, a secondary air path, and a tertiary air path are sequentially fixedly embedded inside the grading cavity. The transmission assembly includes a distribution channel. Both ends of the distribution channel are fixedly connected to hot gas manifolds. Multiple heat delivery pipes are fixedly connected to the outer surface of each hot gas manifold. One end of each heat delivery pipe is fixedly connected to one end of each preheating channel. A flow pipe is fixedly connected to the outer surface of the distribution channel. One end of the flow pipe is fixedly connected to one end of the primary air path.

[0007] Preferably, hydraulic cylinders are provided at the four corners between the static mold and the dynamic mold, a fixed base is fixedly connected to the rear surface of the static mold, and an injection port is provided at the middle of the outer surface of the dynamic mold.

[0008] Preferably, a piston plate is slidably connected inside the heat storage box. Two movable rods are fixedly connected to one outer surface of the piston plate. One end of each movable rod movably passes through the heat storage box to its outside. An installation plate is fixedly connected between one end of the two movable rods. An installation chamber is fixedly installed in the middle of the outer surface of the installation plate. An electric push rod is provided between the inner wall of the installation chamber and the outer surface of the heat storage box. A controller is provided on the top of the heat storage box. An air inlet is opened on one inner wall of the heat storage box.

[0009] Preferably, the outer surface of the primary air path is provided with a primary solenoid valve, and the primary air path is used to inject preheating airflow into the mold; the outer surface of the secondary air path is provided with a secondary solenoid valve, and the secondary air path is used to heat the injection molding material; the outer surface of the tertiary air path is provided with a tertiary solenoid valve, and the tertiary air path is used to heat the workshop environment.

[0010] Preferably, the transmission component further includes an input manifold and an output manifold. The outer surfaces of the input manifold and the output manifold are fixedly connected to multiple conveying pipes. The multiple conveying pipes are respectively fixedly connected to both ends of multiple cooling channels, and the conveying pipes are used to input air into the cooling channels and then output it.

[0011] Preferably, a connecting pipe is fixedly connected to one side of the input manifold, and an air pump is installed between one end of the connecting pipe and the outer surface of the fixed base.

[0012] Preferably, one side of the output manifold is fixedly connected to a gas collecting pipe, a temperature sensor is provided on the outer surface of the gas collecting pipe, and one end of the gas collecting pipe is fixedly connected to one end of the air inlet.

[0013] Preferably, the demolding assembly includes a demolding top plate, and hydraulic push rods are provided at the four corners of the demolding top plate relative to the static mold. The demolding top plate has two demolding connecting grooves inside, and the inner walls of the two demolding connecting grooves are provided with multiple mounting grooves. Each mounting groove is movably connected to a demolding ejector rod, and the multiple demolding ejector rods slide through the static mold to its outside. One end of each demolding ejector rod is provided with a flow hole, and the other end of each demolding ejector rod is provided with a demolding air vent.

[0014] Preferably, an air supply pipe is fixedly connected between one end of the two demolding connecting slots, a guide pipe is fixedly connected to the outer surface of the air supply pipe, a check valve is provided on the outer surface of the guide pipe, one end of the guide pipe is fixedly connected to the bottom of the connecting pipe, and a reinforcing frame is fixedly connected between the heat storage box and the fixed base.

[0015] A method for processing an injection mold for an automotive front bumper grille includes the following steps: S1. By controlling the start of four hydraulic cylinders to start them simultaneously, the dynamic mold and the static mold are combined together. The molten raw material is injected into the injection port through the injection molding equipment, thereby injecting it between the two molding cavities and completing the injection molding of the car front grille. S2. By simultaneously activating four hydraulic push rods, they can extend and retract synchronously, driving the demolding ejector pins to eject the formed workpiece. The check valve is opened, and the gas inside the connecting pipe enters the interior of each demolding ejector pin and is ejected from the demolding air port. When the demolding air port protrudes, it will spray the gas between the formed workpiece and the static mold. S3. By starting the air pump, room temperature air enters each corresponding cooling channel, and the high temperature in the molding cavity of the mold is transported out. The heated gas enters the heat storage box through the gas collection pipe. When the temperature is greater than 70°, the hot gas enters the primary gas circuit and is transported to the corresponding preheating channel to heat the injection mold. The electric push rod extends and retracts, driving the piston plate to slide inside the heat storage box, thereby adjusting the gas pressure and gas storage space inside the heat storage box. S4. The temperature of the gas transported by the gas collection pipeline is detected by the temperature sensor. When the temperature is higher than 70°, only the first-stage solenoid valve is opened to allow the high-temperature gas to enter the first-stage gas path. When the temperature is between 50° and 70°, only the second-stage solenoid valve is opened to allow the high-temperature gas to enter the raw material conveying channel. When the temperature is between 40° and 50°, only the third-stage solenoid valve is opened.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. During use, by starting the air pump, room temperature air enters each cooling channel, thereby transporting the high temperature in the molding cavity of the mold to the heat storage box. Temperature sensors detect different temperatures, and hot air is then transported to different air paths. When the high-temperature gas enters the primary air path, it enters the corresponding preheating channel. When the high-temperature gas passes through the preheating channel, it achieves the purpose of heating the injection mold. By utilizing the high temperature generated by injection molding to preheat the injection mold, the problem of inefficient and wasteful energy utilization is solved. 2. During use, the temperature of the gas transported by the gas collection pipeline is detected by a temperature sensor. When the temperature is higher than 70°C, only the first-stage solenoid valve is opened to allow high-temperature gas to enter the first-stage gas path, thereby preheating the injection mold. When the temperature is between 50°C and 70°C, only the second-stage solenoid valve is opened to allow high-temperature gas to enter the raw material conveying channel to preheat the raw material. When the temperature is between 40°C and 50°C, only the third-stage solenoid valve is opened. The warm gas entering the environment can make the low-temperature environment warmer, thus having the benefit of segmented utilization of high-temperature gas. 3. During use, by activating the four hydraulic push rods, the demolding plate moves towards the static mold, thereby causing multiple demolding ejectors to push outwards simultaneously, thus ejecting the formed workpiece. Opening the check valve allows gas to enter the guide pipe and air supply pipe in sequence. By pushing the demolding ejectors outwards, the gas exerts a mechanical pushing force on the formed workpiece. When the demolding air port protrudes, it sprays gas between the formed workpiece and the static mold, which not only disperses the heat between the formed workpiece and the static mold but also helps to demold quickly and evenly. Attached Figure Description

[0017] Figure 1 This is a first-view perspective perspective view of an injection mold for a front bumper grille of an automobile according to the present invention. Figure 2 This is a second-view perspective perspective view of an injection mold for a front bumper grille of an automobile according to the present invention. Figure 3 This is a third-view perspective view of an injection mold for a front bumper grille of an automobile according to the present invention. Figure 4 This is a sectional perspective view of the transfer assembly portion of an injection mold for an automotive front bumper grille according to the present invention. Figure 5 This is a first-view perspective perspective view of the mold assembly portion of an injection mold for an automotive front bumper grille according to the present invention. Figure 6 This is a second-view perspective view of the mold assembly portion of an injection mold for an automotive front bumper grille according to the present invention. Figure 7 This is a perspective view of the demolding component of an injection mold for an automotive front bumper grille according to the present invention. Figure 8This is a perspective cross-sectional view of the demolding component of an injection mold for an automotive front bumper grille according to the present invention. Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle; Figure 10 This is a perspective cross-sectional view of the heat storage component of an injection mold for an automotive front bumper grille according to the present invention. Figure 11 This is another perspective view of the heat storage component of the injection mold for an automotive front bumper grille according to the present invention.

[0018] In the picture: 1. Mold Components; 101. Fixed Base; 102. Static Mold; 103. Hydraulic Cylinder; 104. Dynamic Mold; 105. Cooling Channel; 106. Injection Port; 107. Hydraulic Push Rod; 108. Preheating Channel; 2. Heat Storage Components; 201. Heat Storage Box; 202. Staged Chamber; 203. Primary Air Passage; 204. Secondary Air Passage; 205. Tertiary Air Passage; 206. Piston Plate; 207. Movable Rod; 208. Mounting Plate; 209. Mounting Chamber; 210. Electric Push Rod; 211. Controller; 212. Air Inlet; 213. Primary Solenoid Valve; 214. Secondary Solenoid Valve; 2 15. Three-stage solenoid valve; 3. Transmission assembly; 301. Delivery pipe; 302. Input manifold; 303. Connecting pipe; 304. Output manifold; 305. Gas collection pipe; 306. Temperature sensor; 307. Heat supply pipe; 308. Hot gas collection pipe; 309. Diversion channel; 310. Flow pipe; 311. Air pump; 4. Demolding assembly; 401. Demolding top plate; 402. Air supply pipe; 403. Guide pipe; 404. Check valve; 405. Mounting slot; 406. Demolding ejector rod; 407. Flow hole; 408. Demolding air port; 409. Demolding connecting slot; 5. Reinforcing frame. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Refer to Figures 1-11As shown, the present invention provides an injection mold for a front bumper grille of an automobile, including a mold assembly 1, a heat storage assembly 2, a transfer assembly 3, and a demolding assembly 4. The mold assembly 1 includes a static mold 102 and a dynamic mold 104. Multiple cooling channels 105 are provided on the top of both the static mold 102 and the dynamic mold 104. Multiple preheating channels 108 are provided on the outer surface of both the static mold 102 and the dynamic mold 104. The heat storage assembly 2 includes a heat storage box 201, and a graded... The cavity 202, the graded cavity 202, is internally fixedly equipped with a primary air path 203, a secondary air path 204, and a tertiary air path 205; the transmission component 3 includes a diversion channel 309, both ends of which are fixedly connected to a hot gas manifold 308, and the outer surface of each hot gas manifold 308 is fixedly connected to multiple heat delivery pipes 307, one end of each heat delivery pipe 307 being fixedly connected to one end of each preheating channel 108; the outer surface of the diversion channel 309 is fixedly connected to a flow pipe 310, the flow pipe 310... One end is fixedly connected to one end of the primary air circuit 203. Hydraulic cylinders 103 are installed near the four corners of the static mold 102 and the dynamic mold 104. A fixed base 101 is fixedly connected to the rear surface of the static mold 102. An injection port 106 is opened in the middle of the outer surface of the dynamic mold 104. The transmission assembly 3 also includes an input manifold 302 and an output manifold 304. Multiple delivery pipes 301 are fixedly connected to the outer surfaces of both the input manifold 302 and the output manifold 304. 301 is fixedly connected to both ends of multiple cooling channels 105 respectively, and the delivery pipe 301 is used to input air into the cooling channel 105 and then output it. One side of the input manifold 302 is fixedly connected to a connecting pipe 303. One end of the connecting pipe 303 is connected to the outer surface of the fixed base 101 with an air pump 311. One side of the output manifold 304 is fixedly connected to an air collecting pipe 305. The outer surface of the air collecting pipe 305 is provided with a temperature sensor 306. One end of the air collecting pipe 305 is fixedly connected to one end of the air inlet 212.

[0021] In this embodiment, during use, four hydraulic cylinders 103 are activated simultaneously to push the dynamic mold 104 towards the static mold 102. The molding cavities on the surfaces of the dynamic mold 104 and the static mold 102 then merge. Molten raw material is injected into the injection port 106 using an injection molding machine, thus filling the space between the two molding cavities and completing the injection molding of the car front grille. The air pump 311 is activated to inject room temperature air into the connecting pipe 303. This air enters the input manifold 302 and then passes through multiple delivery pipes 301 into corresponding cooling channels 105. The cooling channels 105 are located very close to the molding cavities, allowing the room temperature air inside to remove the high-temperature air from the molding cavities. The heated gas then passes through the delivery pipe 301 at the other end of the cooling channel 105 and enters the output manifold 304. Finally, the heated gas passes through the gas collecting pipe... The gas enters the heat storage box 201 through channel 305. At this time, the temperature sensor 306 detects the temperature of the hot gas and transmits the signal to the controller 211. According to the different temperatures, the hot gas is delivered to different gas paths. When the temperature is greater than 70°, it is determined to be high-grade hot gas, and the high-temperature gas enters the primary gas path 203 and is delivered to the flow pipe 310. Next, it enters the diversion channel 309, and then enters the corresponding preheating channel 108 through the heat delivery pipe 307. When the high-temperature gas passes through the preheating channel 108, it achieves the purpose of heating the injection mold. By utilizing the high temperature generated by injection molding to preheat the injection mold, the problem of inefficient and wasteful energy utilization is solved. When the temperature is between 50° and 70°, it is determined to be mid-grade hot gas, and the gas enters the secondary gas path 204. When the gas temperature is between 40° and 50°, it is determined to be low-grade hot gas, and the gas enters the tertiary gas path 205, thereby achieving the benefit of rationally utilizing the heat generated by injection mold processing.

[0022] Example 2: Figures 1-11As shown, the heat storage assembly 2 includes a heat storage box 201. A grading chamber 202 is fixedly embedded on one side of the heat storage box 201. A primary air passage 203, a secondary air passage 204, and a tertiary air passage 205 are sequentially fixedly embedded inside the grading chamber 202. A piston plate 206 is slidably connected inside the heat storage box 201. Two movable rods 207 are fixedly connected to the outer surface of one side of the piston plate 206. One end of each movable rod 207 movably passes through the heat storage box 201 to its outside. A mounting plate 208 is fixedly connected between the ends of the two movable rods 207. An installation chamber 209 is fixedly installed in the middle of the outer surface of the mounting plate 208. An electric push rod 210 is provided between the inner wall of the installation chamber 209 and the outer surface of the heat storage box 201. A controller 211 is installed on the top of the heat storage box 201. An air inlet 212 is opened on the inner wall of one side of the heat storage box 201. A primary solenoid valve 213 is installed on the outer surface of the primary air passage 203, and the primary air passage 203 is used to inject preheating airflow into the mold. A secondary solenoid valve 214 is installed on the outer surface of the secondary air passage 204, and the secondary air passage 204 is used to heat the injection molding material. A tertiary solenoid valve 215 is installed on the outer surface of the tertiary air passage 205, and the tertiary air passage 205 is used to heat the workshop environment. The transmission component 3 also includes an input manifold 302 and an output manifold 304. A gas collecting pipe 305 is fixedly connected to one side of the output manifold 304, and a temperature sensor 306 is installed on the outer surface of the gas collecting pipe 305.

[0023] In this embodiment, during use, the electric push rod 210 extends and retracts, causing the piston plate 206 to slide inside the heat storage box 201, thereby adjusting the gas pressure and storage space inside the heat storage box 201. The temperature sensor 306 detects the temperature of the gas delivered by the gas collection pipe 305. When the temperature is higher than 70°, only the first-stage solenoid valve 213 is opened, allowing high-temperature gas to enter the first-stage gas path 203 to preheat the injection mold. When the temperature is between 50° and 70°, only the second-stage solenoid valve 214 is opened, allowing high-temperature gas to enter the raw material conveying channel to preheat the raw material. When the temperature is between 40° and 50°, only the third-stage solenoid valve 215 is opened, allowing warm gas to enter the environment, which can make the low-temperature environment warmer, thus having the advantage of segmented utilization of high-temperature gas. The first-stage solenoid valve 213, the second-stage solenoid valve 214, the third-stage solenoid valve 215 and the temperature sensor 306 are all connected to the controller 211, which controls their automatic start-up, shutdown and operation.

[0024] Example 3: Figures 1-11As shown, the demolding assembly 4 includes a demolding top plate 401. Hydraulic push rods 107 are provided near the four corners of the demolding top plate 401 and the static mold 102. Two demolding connecting grooves 409 are formed inside the demolding top plate 401. Multiple mounting grooves 405 are formed on the inner walls of both demolding connecting grooves 409. A demolding ejector rod 406 is movably connected to the inner wall of each mounting groove 405, and the multiple demolding ejector rods 406 slide through the static mold 102 to its outside. Each demolding ejector rod... Each rod 406 has a flow hole 407 at one end and a demolding air port 408 at the other end. An air supply pipe 402 is fixedly connected between one end of the two demolding connecting grooves 409. A guide pipe 403 is fixedly connected to the outer surface of the air supply pipe 402. A check valve 404 is installed on the outer surface of the guide pipe 403. One end of the guide pipe 403 is fixedly connected to the bottom of the connecting pipe 303. A reinforcing frame 5 is fixedly connected between the heat storage box 201 and the fixed base 101.

[0025] In this embodiment, during use, four hydraulic push rods 107 are activated simultaneously to extend and retract synchronously. When they retract, they drive the demolding top plate 401 to move towards the static mold 102, thereby causing multiple demolding ejector rods 406 to push outwards simultaneously, thus ejecting the formed workpiece. At this time, the check valve 404 is opened, and the gas inside the connecting pipe 303 enters the guide pipe 403 and the air supply pipe 402 in sequence, and is then delivered to the two demolding connecting grooves 409 respectively. Due to the demolding ejector rods 406... The interior is hollow, and the flow hole 407 and the demolding connecting groove 409 form a flow channel. Then the gas inside the two demolding connecting grooves 409 will enter the interior of each demolding ejector 406 and finally be ejected from the demolding air port 408. By pushing the demolding ejector 406 outward, it will have a mechanical pushing force on the molded workpiece. When the demolding air port 408 protrudes, it will spray gas between the molded workpiece and the static mold 102, which will not only disperse the heat between the molded workpiece and the static mold 102, but also help to demold quickly and evenly.

[0026] The processing method and working principle of this device are as follows: During use, four hydraulic cylinders 103 are activated simultaneously and synchronously, pushing the dynamic mold 104 towards the static mold 102. The molding cavities on the surfaces of the dynamic mold 104 and the static mold 102 then merge. Molten raw material is injected into the injection port 106 using injection molding equipment, thus filling the space between the two molding cavities and completing the injection molding of the car front grille. Simultaneously activating four hydraulic push rods 107 allows them to extend and retract synchronously. When they retract, they drive the demolding plate 401 towards the static mold 102, causing multiple demolding push rods 406 to push outwards simultaneously, ejecting the molded workpiece. At this time, the check valve 404 is opened, connecting pipe 3... The gas inside the mold 102 sequentially enters the guide pipe 403 and the air supply pipe 402, and is then delivered to the two demolding connecting grooves 409. Since the demolding ejector pin 406 is hollow and the flow hole 407 forms a flow channel with the demolding connecting groove 409, the gas inside the two demolding connecting grooves 409 enters the demolding ejector pin 406 and is finally ejected from the demolding air port 408. By pushing the demolding ejector pin 406 outward, it exerts a mechanical thrust on the molded workpiece. When the demolding air port 408 protrudes, it sprays gas between the molded workpiece and the static mold 102. By starting the air pump 311, room temperature air is injected into the connecting pipe 303. The room temperature air enters the input manifold 302 and then passes through multiple delivery pipes 301. The air enters each corresponding cooling channel 105. The cooling channel 105 is very close to the molding cavity, so the ambient temperature air supplied inside the cooling channel 105 will remove the high temperature air from the molding cavity. The heated gas then passes through the delivery pipe 301 installed at the other end of the cooling channel 105 and enters the output manifold 304. The heated gas then enters the heat storage tank 201 through the gas collecting pipe 305. At this point, the temperature sensor 306 detects the temperature of the hot gas and transmits the signal to the controller 211. Based on the temperature, the hot gas is delivered to different gas paths. When the temperature is greater than 70°C, it is determined to be high-temperature hot gas, and the high-temperature gas enters the primary gas path 203 and is then delivered to the flow pipe 310, where it enters the distribution channel. The gas flows through channel 309, then through heating pipe 307 into the corresponding preheating channel 108, heating the injection mold. When the temperature is between 50°C and 70°C, it is determined to be mid-stage hot gas, and the gas enters the secondary gas path 204. When the gas temperature is between 40°C and 50°C, it is determined to be low-stage hot gas, and the gas enters the tertiary gas path 205. An electric push rod 210 extends and retracts, causing the piston plate 206 to slide inside the heat storage tank 201, thereby regulating the gas pressure and storage space inside the heat storage tank 201. A temperature sensor 306 detects the temperature of the gas delivered through the gas collection pipe 305. When the temperature is higher than 70°C, only the primary solenoid valve 213 is opened, allowing the high-temperature gas to enter the primary gas path 203, thus preheating the injection mold.When the temperature is between 50°C and 70°C, only the secondary solenoid valve 214 is opened, allowing high-temperature gas to enter the raw material conveying channel to preheat the raw material. When the temperature is between 40°C and 50°C, only the tertiary solenoid valve 215 is opened, allowing warm gas to enter the environment and further warm the low-temperature environment. The primary solenoid valve 213, secondary solenoid valve 214, tertiary solenoid valve 215, and temperature sensor 306 are all connected to controller 211, which controls their automatic start-up, shutdown, and operation.

[0027] The wiring diagrams for the hydraulic cylinder 103, electric push rod 210, controller 211, primary solenoid valve 213, secondary solenoid valve 214, tertiary solenoid valve 215, temperature sensor 306, air pump 311, and check valve 404 in this invention are common knowledge in the field, and their working principles are known technologies. The appropriate models are selected according to actual use. Therefore, the control methods and wiring arrangements for the hydraulic cylinder 103, electric push rod 210, controller 211, primary solenoid valve 213, secondary solenoid valve 214, tertiary solenoid valve 215, temperature sensor 306, air pump 311, and check valve 404 will not be explained in detail.

[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An injection mold for a front bumper grille of an automobile, comprising a mold assembly (1), a heat storage assembly (2), a transfer assembly (3), and a demolding assembly (4), characterized in that: The mold assembly (1) includes a static mold (102) and a dynamic mold (104). Multiple cooling channels (105) are provided on the top of the static mold (102) and the top of the dynamic mold (104). Multiple preheating channels (108) are provided on the outer surface of the static mold (102) and the outer surface of the dynamic mold (104). The heat storage component (2) includes a heat storage box (201), and a graded cavity (202) is fixedly embedded on one side of the heat storage box (201). A primary air passage (203), a secondary air passage (204) and a tertiary air passage (205) are fixedly embedded in the interior of the graded cavity (202) in sequence. The transmission component (3) includes a diversion channel (309), both ends of which are fixedly connected to a hot gas manifold (308). The outer surface of each hot gas manifold (308) is fixedly connected to a plurality of heat delivery pipes (307). One end of each heat delivery pipe (307) is fixedly connected to one end of each preheating channel (108). The outer surface of the diversion channel (309) is fixedly connected to a flow pipe (310), one end of which is fixedly connected to one end of the primary gas path (203).

2. The injection mold for the automotive front bumper grille according to claim 1, characterized in that: Hydraulic cylinders (103) are provided at the four corners of the static mold (102) and the dynamic mold (104). A fixed base (101) is fixedly connected to the rear surface of the static mold (102). An injection port (106) is opened in the middle of the outer surface of the dynamic mold (104).

3. The injection mold for the automotive front bumper grille according to claim 2, characterized in that: A piston plate (206) is slidably connected inside the heat storage box (201). Two movable rods (207) are fixedly connected to one side of the outer surface of the piston plate (206). One end of each of the two movable rods (207) moves through the heat storage box (201) to its outside. An installation plate (208) is fixedly connected between one end of each of the two movable rods (207). An installation chamber (209) is fixedly installed in the middle of the outer surface of the installation plate (208). An electric push rod (210) is provided between the inner wall of the installation chamber (209) and the outer surface of the heat storage box (201). A controller (211) is provided on the top of the heat storage box (201). An air inlet (212) is opened on one side of the inner wall of the heat storage box (201).

4. The injection mold for the automotive front bumper grille according to claim 3, characterized in that: The outer surface of the primary air passage (203) is provided with a primary solenoid valve (213), and the primary air passage (203) is used to inject preheating airflow into the mold. The outer surface of the secondary air passage (204) is provided with a secondary solenoid valve (214), and the secondary air passage (204) is used to heat the injection molding material. The outer surface of the tertiary air passage (205) is provided with a tertiary solenoid valve (215), and the tertiary air passage (205) is used to heat the workshop environment.

5. The injection mold for the automotive front bumper grille according to claim 4, characterized in that: The transmission component (3) further includes an input manifold (302) and an output manifold (304). The outer surfaces of the input manifold (302) and the output manifold (304) are fixedly connected to a plurality of delivery pipes (301). The plurality of delivery pipes (301) are fixedly connected to the two ends of a plurality of cooling channels (105), and the delivery pipes (301) are used to input air into the cooling channels (105) and then output it.

6. The injection mold for the automotive front bumper grille according to claim 5, characterized in that: One side of the input manifold (302) is fixedly connected to a connecting pipe (303), and an air pump (311) is provided between one end of the connecting pipe (303) and the outer surface of the fixed base (101).

7. The injection mold for the automotive front bumper grille according to claim 6, characterized in that: One side of the output manifold (304) is fixedly connected to a gas collecting pipe (305), and a temperature sensor (306) is provided on the outer surface of the gas collecting pipe (305). One end of the gas collecting pipe (305) is fixedly connected to one end of the air inlet (212).

8. The injection mold for the automotive front bumper grille according to claim 7, characterized in that: The demolding assembly (4) includes a demolding top plate (401). Hydraulic push rods (107) are provided at the four corners between the demolding top plate (401) and the static mold (102). Two demolding connecting grooves (409) are opened inside the demolding top plate (401). Multiple mounting grooves (405) are opened on the inner wall of the two demolding connecting grooves (409). A demolding push rod (406) is movably connected to the inner wall of each mounting groove (405). Multiple demolding push rods (406) slide through the static mold (102) to its outside. A flow hole (407) is opened at one end of each demolding push rod (406), and a demolding air port (408) is opened at the other end of each demolding push rod (406).

9. The injection mold for the automotive front bumper grille according to claim 8, characterized in that: An air supply pipe (402) is fixedly connected between one end of the two demolding connecting slots (409). A guide pipe (403) is fixedly connected to the outer surface of the air supply pipe (402). A check valve (404) is provided on the outer surface of the guide pipe (403). One end of the guide pipe (403) is fixedly connected to the bottom of the connecting pipe (303). A reinforcing frame (5) is fixedly connected between the heat storage box (201) and the fixed base (101).

10. A method for processing an injection mold for an automotive front bumper grille, characterized in that, The injection mold for the automotive front bumper grille as described in claim 9 is used, comprising the following steps: S1. By controlling the start of four hydraulic cylinders (103) to start them simultaneously, the dynamic mold (104) and the static mold (102) are combined together. The molten raw material is injected into the injection port (106) through the injection molding equipment, thereby injecting it between the two molding cavities and completing the injection molding of the front grille of the car. S2. By simultaneously activating four hydraulic push rods (107), they can extend and retract synchronously, driving the demolding ejector rods (406) to eject the formed workpiece, opening the check valve (404), and allowing the gas inside the connecting pipe (303) to enter the interior of each demolding ejector rod (406) and spray out from the demolding air port (408). When the demolding air port (408) protrudes, it will spray the gas between the formed workpiece and the static mold (102). S3. By starting the air pump (311), room temperature air enters each corresponding cooling channel (105) to transport the high temperature in the molding cavity of the mold out. The heated gas enters the heat storage box (201) through the gas collection pipe (305). When the temperature is greater than 70°, the high heat gas enters the primary gas path (203) and is transported to the corresponding preheating channel (108) to heat the injection mold. Through the electric push rod (210), it extends and retracts to drive the piston plate (206) to slide inside the heat storage box (201), thereby adjusting the gas pressure and gas storage space inside the heat storage box (201). S4. The temperature of the gas transported by the gas collection pipe (305) is detected by the temperature sensor (306). When the temperature is higher than 70°, only the first-stage solenoid valve (213) is opened to allow the high-temperature gas to enter the first-stage gas path (203). When the temperature is between 50° and 70°, only the second-stage solenoid valve (214) is opened to allow the high-temperature gas to enter the raw material transport channel. When the temperature is between 40° and 50°, only the third-stage solenoid valve (215) is opened.

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