Lightweight injection molding part mold structure and injection molding method thereof

Abstract

The application relates to the technical field of new energy automobile part production, and particularly discloses a light-weight injection-molded part mold structure and an injection molding method thereof, which is used for injection molding of the shell of an intelligent central control screen. The mold structure comprises a movable mold mechanism and a fixed mold mechanism which are matched with each other. The movable mold mechanism comprises a movable mold plate and a movable mold core, and the movable mold core is embedded in the movable mold plate. The fixed mold mechanism comprises a fixed mold plate and a fixed mold core, and the fixed mold core is embedded in the fixed mold plate. When the movable mold mechanism and the fixed mold mechanism are closed, the movable mold core and the fixed mold core form a forming mold cavity of the shell. The movable mold plate is provided with a glue injection mechanism. The glue injection mechanism comprises a main runner and two branch runners. One end of each of the two branch runners is communicated with the main runner, and the other end of each of the two branch runners is communicated with one end of the forming mold cavity. Each of the two branch runners is provided with an opening and closing assembly which can open and close. The application has the effect of reducing the manufacturing cost of the shell of the intelligent central control screen.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicle parts production, and in particular to a lightweight injection molding mold structure for parts and its injection molding method. Background Technology

[0002] The intelligent central control screen of new energy vehicles, together with the controller, displays designated information or interacts with the user. The outer shell of the intelligent central control screen is used to install light guide plates, light emitters, etc., and is usually made of aluminum alloy.

[0003] Reference Figure 1 and Figure 2 The aluminum alloy shell 1 of the intelligent central control screen is generally rectangular in shape. It has slots or mounting bases on both sides and the sides for installation. Its external structure is relatively complex. At the same time, as aluminum alloy is a metal material, the price of metal raw materials fluctuates in the market and is relatively expensive, resulting in high cost of the shell 1 of the intelligent central control screen. This problem needs to be solved urgently. Summary of the Invention

[0004] In order to reduce the manufacturing cost of the housing of the smart central control screen, this application provides a lightweight injection molding part mold structure and its injection molding method.

[0005] This application provides a lightweight injection molding mold structure for a part and its injection molding method, which adopts the following technical solution:

[0006] A lightweight injection molding mold structure for injection molding the shell of a smart central control screen is disclosed. The mold structure includes a moving mold mechanism and a fixed mold mechanism that cooperate with each other. The moving mold mechanism includes a moving template and a moving mold core, with the moving mold core fixedly embedded in the surface of the moving template. The fixed mold mechanism includes a fixed template and a fixed mold core, with the fixed mold core embedded in the surface of the fixed template. When the moving mold mechanism and the fixed mold mechanism are closed, the moving mold core and the moving mold core together form the molding cavity of the shell. The moving template is provided with an injection mechanism for injecting glue into the molding cavity. The injection mechanism includes a main runner and two branch runners. One end of each of the two branch runners is connected to the main runner, and the other end of each of the two branch runners is connected to both ends of the molding cavity. Each of the two branch runners is provided with an opening and closing component for opening and closing.

[0007] By adopting the above technical solution, the shell of the smart central control screen is manufactured by injection molding to replace the aluminum alloy shell, which helps to reduce the manufacturing cost of the smart central control screen shell. During the injection molding process of the shell, two runners inject glue into the molding cavity, which helps to improve production efficiency. The opening and closing component opens and closes the runners, which can control the glue injection start time of the two runners. The glue injection operation is performed at intervals between the two runners, which helps to improve the uniformity of glue flow. Moreover, when the two glue streams converge, it helps to improve the melting effect, thereby improving the production quality of the shell.

[0008] Preferably, the opening and closing assembly includes a cylinder, a valve needle, a solenoid valve, and a timing controller. The solenoid valve and the timing controller are installed on the outside of the moving template. The valve needle is movably inserted inside the distribution channel. The cylinder is installed outside the distribution channel. The valve needle is connected to the piston rod of the cylinder. The cylinder, the solenoid valve, and the timing controller are electrically connected. There is a time interval between the start of glue injection in the two distribution channels.

[0009] By adopting the above technical solution, the timing controller controls the extension or retraction of the cylinder piston rod through the solenoid valve. When the timing controller controls the cylinder piston rod to extend through the solenoid valve, the cylinder piston rod pushes the valve needle to move, so that the valve needle blocks the port of the distribution channel. At this time, the distribution channel cannot be injected with glue. When the timing controller controls the cylinder piston rod to retract through the solenoid valve, the cylinder piston rod pulls the valve needle to move in the opposite direction, so that the valve needle opens the port of the distribution channel. At this time, the distribution channel can be injected with glue, thereby realizing the opening and closing function of the glue injection operation of the distribution channel.

[0010] Preferably, both the main flow channel and the branch flow channel are equipped with heating elements.

[0011] By adopting the above technical solution, when the sub-channel is in a closed state, the heating element heats the plastic raw material in the main channel and the sub-channel, so that the plastic raw material remains in a molten state, preventing blockage when the sub-channel is opened, thereby improving the smoothness and stability of the injection operation.

[0012] Preferably, the device further includes a side insert mechanism, which includes a movable wedge block, a fixed wedge block, an insert, and a reset member. The movable wedge block is fixedly disposed on the movable mold plate, the fixed wedge block is slidably connected to the fixed mold plate, and the insert is fixedly connected to the side wall of the fixed wedge block facing the molding cavity. The movable wedge block and the fixed wedge block are wedge-shaped and fitted together. When the movable mold mechanism and the fixed mold mechanism are closed, the movable wedge block pushes the fixed wedge block to move closer to the molding cavity. The reset member is disposed on the fixed wedge block. When the movable mold mechanism and the fixed mold mechanism are separated, the reset member pushes the fixed wedge block to move away from the molding cavity.

[0013] By adopting the above technical solution, during the mold closing process of the moving mold mechanism and the fixed mold mechanism, the moving wedge block pushes the fixed wedge block to move closer to the forming mold cavity through wedge-shaped engagement. Simultaneously, the fixed wedge block pushes the insert into the forming mold cavity to form the groove structure on the side wall of the shell. During the mold separation process of the moving mold mechanism and the fixed mold mechanism, the moving wedge block moves away from the fixed wedge block to release the push on the fixed wedge block. At the same time, the reset component pushes the fixed wedge block to move away from the forming mold cavity. Simultaneously, the fixed wedge block pulls the insert out of the finished shell, thereby facilitating the subsequent demolding operation of the shell. The process of the insert entering the forming mold cavity is linked and synchronized with the mold closing process, and the process of the insert being pulled out of the finished shell is linked and synchronized with the mold separation process. Without adding process steps, a groove structure that is easy to install is formed on the side wall of the shell, which is convenient and quick.

[0014] Preferably, the reset component is configured as a first reset spring, one end of which is connected to the fixed wedge block and the other end of which is connected to the fixed mold core. When the moving mold mechanism and the fixed mold mechanism separate the mold, the first reset spring is in its natural state.

[0015] By adopting the above technical solution, when the moving mold mechanism and the fixed mold mechanism separate, the first return spring is in a natural state. During the process of closing the moving mold mechanism and the fixed mold mechanism, the insert is pushed into the molding cavity. At this time, the first return spring is in a compressed state. When the moving mold mechanism and the fixed mold mechanism separate, the restoring force of the first return spring pushes the insert out from the side wall of the finished shell, thereby realizing the reset of the insert, so as to facilitate the next injection molding operation. The automatic reset is simple and convenient.

[0016] Preferably, it also includes a moving mold demolding mechanism, which includes a fastening component and a moving mold inclined ejector component. The moving mold inclined ejector component is disposed on the moving mold plate. When the moving mold mechanism and the fixed mold mechanism separate, the fastening component drives the moving mold inclined ejector component to eject the formed outer shell obliquely out of the moving mold core.

[0017] Because the outer shell of the smart central control screen has a snap-fit ​​on the molding surface of the moving mold core, during the demolding process of the outer shell, the outer shell needs to be separated from the moving mold core first. During the mold separation process of the moving mold mechanism and the fixed mold mechanism, the snap-fit ​​component drives the moving mold inclined ejector component to push the molded outer shell out of the moving mold core at an angle, so as to achieve the separation of the outer shell from the moving mold core.

[0018] Preferably, the fastening assembly includes a fastening post and a fastening sleeve with an interference fit. The fastening post is vertically fixed to the fixed mold core, and the fastening sleeve passes through the moving mold core. The fastening sleeve is connected to the moving mold inclined ejector assembly. The fastening post and the fastening sleeve are made of soft silicone.

[0019] By adopting the above technical solution, when the moving mold mechanism and the fixed mold mechanism are closed, the locking pin is inserted into the locking cylinder with an interference fit. When the moving mold mechanism and the fixed mold mechanism are separated, since the locking pin and the locking cylinder are made of soft silicone and have an interference fit, the locking pin can pull the locking cylinder to move a certain distance before the locking pin and the locking cylinder are separated. The locking cylinder synchronously pulls the moving mold inclined ejector assembly to move, thereby realizing the inclined ejection of the outer shell from the moving mold core.

[0020] Preferably, the moving mold inclined ejector assembly includes a moving mold connecting plate and a moving mold inclined ejector rod. The moving mold connecting plate is movably disposed inside the moving mold plate. The fastening cylinder passes through the moving mold core and is fixedly connected to the moving mold connecting plate. One end of the moving mold inclined ejector rod is connected to the moving mold connecting plate, and the other end of the moving mold inclined ejector rod passes through the moving mold core. When the moving mold mechanism and the fixed mold mechanism are closed, the end of the moving mold inclined ejector rod is flush with the cavity wall of the forming mold cavity.

[0021] By adopting the above technical solution, when the moving mold mechanism and the fixed mold mechanism are closed, the end of the moving mold inclined ejector is flush with the cavity wall of the forming mold cavity. When the moving mold mechanism and the fixed mold mechanism are separated, the fastening column pulls the fastening cylinder to move a certain distance. The fastening cylinder simultaneously pulls the moving mold connecting plate to move a certain distance towards the fixed mold mechanism. At this time, the moving mold connecting plate pushes the moving mold inclined ejector to move obliquely towards the fixed mold mechanism, so that the moving mold inclined ejector will obliquely eject the outer shell from the moving mold core.

[0022] Preferably, it further includes a fixed mold ejection mechanism for ejecting the outer shell from the fixed mold core. The fixed mold ejection mechanism includes a fixed mold connecting plate, a fixed mold inclined ejector rod, and a second return spring. The fixed mold connecting plate is movably disposed inside the fixed mold plate. One end of the fixed mold inclined ejector rod is connected to the fixed mold connecting plate, and the other end of the fixed mold inclined ejector rod passes through the fixed mold core. One end of the second return spring is connected to the fixed mold inclined ejector rod, and the other end of the second return spring is connected to the fixed mold core. When the second return spring is in its natural state, the end of the fixed mold inclined ejector rod is flush with the cavity wall of the molding cavity.

[0023] Since the outer shell of the smart central control screen also has snap-fit ​​on the molding surface of the fixed mold core, during the demolding process of the outer shell, after the outer shell is separated from the moving mold core, it also needs to be separated from the fixed mold core. Specifically, the fixed mold connecting plate drives the fixed mold inclined ejector to move towards the moving mold mechanism, so that the fixed mold inclined ejector will push the outer shell out of the fixed mold core at an angle to complete the complete demolding operation of the outer shell. After the outer shell is pushed out of the fixed mold core at an angle, the second return spring is in a compressed state. The restoring force of the second return spring pushes the fixed mold connecting plate and the fixed mold inclined ejector to reset, so as to facilitate the next demolding operation.

[0024] An injection molding method, comprising using the aforementioned lightweight injection molding part mold structure, includes the following steps:

[0025] S1: The moving mold mechanism and the fixed mold mechanism close the mold, and the moving mold core and the fixed mold core surround to form a forming mold cavity, and the insert is inserted into the forming mold cavity;

[0026] S2: Glue injection, two sub-channels inject glue into the molding cavity at time intervals to form the outer shell;

[0027] S3: The moving mold mechanism and the fixed mold mechanism separate the mold. During the mold separation process, the moving mold demolding mechanism pushes the outer shell out from the moving mold core at an angle.

[0028] S4: After the outer shell is ejected from the moving mold core at an angle, the fixed mold ejection mechanism ejects the outer shell from the fixed mold core at an angle, achieving complete material removal.

[0029] By adopting the above technical solution, when the outer shell of the intelligent central control screen needs to be molded, the moving mold mechanism and the fixed mold mechanism close the mold, and the moving mold core and the fixed mold core surround to form the molding cavity. The moving wedge block pushes the fixed wedge block to move and push the insert into the molding cavity. Then, the glue injection operation is performed. The two runners inject glue into the molding cavity at time intervals. The time interval between the two runners injection operations helps to improve the uniformity of glue flow, and when the two streams of glue converge, it helps to improve the melting effect, thereby improving the production quality of the outer shell. After the outer shell in the molding cavity is cooled and formed, the moving mold mechanism and the fixed mold mechanism separate the mold. During the mold separation process, the restoring force of the first return spring pushes the insert out from the side wall of the finished outer shell, thereby realizing the reset of the insert for the next injection molding operation. The reset is automatic and the reset structure is simple and convenient. The snap-fit ​​column can pull the snap-fit ​​cylinder a certain distance. Simultaneously, the snap-fit ​​cylinder pulls the moving mold connecting plate a certain distance towards the fixed mold mechanism. At this time, the moving mold connecting plate pushes the moving mold inclined ejector rod towards the fixed mold mechanism, so that the moving mold inclined ejector rod pushes the outer shell out of the moving mold core. Then, the fixed mold connecting plate drives the fixed mold inclined ejector rod towards the moving mold mechanism, so that the fixed mold inclined ejector rod pushes the outer shell out of the fixed mold core, thus completing the complete demolding operation of the outer shell. After the outer shell is pushed out of the fixed mold core, the second return spring is in a compressed state. The restoring force of the second return spring pushes the fixed mold connecting plate and the fixed mold inclined ejector rod to reset, so as to facilitate the next demolding operation. The entire production process of the intelligent central control screen outer shell is carried out in conjunction with each functional module, realizing the production of complex outer shell products without adding process steps.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. By setting up a cylinder, valve needle, solenoid valve, and timing controller, the timing controller controls the extension or retraction of the cylinder piston rod through the solenoid valve. When the timing controller controls the cylinder piston rod to extend through the solenoid valve, the cylinder piston rod pushes the valve needle to move, causing the valve needle to block the port of the distribution channel. At this time, the distribution channel cannot be injected with glue. When the timing controller controls the cylinder piston rod to retract through the solenoid valve, the cylinder piston rod pulls the valve needle to move in the opposite direction, causing the valve needle to open the port of the distribution channel. At this time, the distribution channel can be injected with glue, thus realizing the opening and closing function of the distribution channel injection operation.

[0032] 2. By setting up wedge blocks, fixed wedge blocks, inserts, and reset components, during the mold closing process of the moving mold mechanism and the fixed mold mechanism, the moving wedge block pushes the fixed wedge block towards the forming mold cavity through wedge-shaped engagement. Simultaneously, the fixed wedge block pushes the insert into the forming mold cavity to form the groove structure on the side wall of the shell. During the mold separating process of the moving mold mechanism and the fixed mold mechanism, the moving wedge block moves away from the fixed wedge block to release the push on the fixed wedge block. At the same time, the reset component pushes the fixed wedge block away from the forming mold cavity. Simultaneously, the fixed wedge block pulls the insert out of the finished shell, thus facilitating the subsequent demolding operation of the shell. The process of the insert entering the forming mold cavity is linked and synchronized with the mold closing process, and the process of the insert being pulled out of the finished shell is linked and synchronized with the mold separating process. Without adding process steps, a groove structure that is easy to install is formed on the side wall of the shell, which is convenient and quick.

[0033] 3. By setting an interference fit between the locking pin and the locking cylinder, when the moving mold mechanism and the fixed mold mechanism are closed, the locking pin is inserted into the locking cylinder with interference fit. When the moving mold mechanism and the fixed mold mechanism are separated, since the locking pin and the locking cylinder are made of soft silicone and have an interference fit, the locking pin can pull the locking cylinder to move a certain distance before the locking pin and the locking cylinder separate. The locking cylinder synchronously pulls the moving mold inclined ejector assembly to move, thereby realizing the inclined ejection of the outer shell from the moving mold core. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the housing of a smart central control screen in existing technology.

[0035] Figure 2 This is a structural schematic diagram of the casing of a smart central control screen from another perspective in existing technology.

[0036] Figure 3 This is a schematic diagram of the structure of the moving mold mechanism and the fixed mold mechanism when they are closed in the embodiments of this application.

[0037] Figure 4 This is a schematic diagram of the moving mold mechanism and the fixed mold mechanism during mold separation in the embodiments of this application.

[0038] Figure 5This is a structural schematic diagram from another perspective of the separation of the moving mold mechanism and the fixed mold mechanism in the embodiments of this application.

[0039] Figure 6 This is a schematic diagram of the internal structure of the mold fixing mechanism in the embodiments of this application.

[0040] Figure 7 This is a schematic diagram of the glue injection mechanism in the embodiments of this application.

[0041] Figure 8 This is a schematic diagram of the internal structure of the moving mold mechanism in the embodiments of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Outer shell; 2. Moving mold mechanism; 21. Moving mold plate; 22. Moving mold core; 3. Fixed mold mechanism; 31. Fixed mold plate; 32. Fixed mold core; 4. Injection mechanism; 41. Main runner; 42. Sub-runner; 5. Opening and closing assembly; 51. Cylinder; 52. Valve needle; 53. Solenoid valve; 54. Timing controller; 61. Moving wedge block; 62. Fixed wedge block; 63. Insert; 64. First return spring; 71. Fastening assembly; 711. Fastening post; 712. Fastening cylinder; 72. Moving mold inclined ejector assembly; 721. Moving mold connecting plate; 722. Moving mold inclined ejector rod; 8. Fixed mold demolding mechanism; 81. Fixed mold connecting plate; 82. Fixed mold inclined ejector rod; 83. Second return spring. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 3-8 This application will be described in further detail.

[0045] The aluminum alloy shell of the smart central control screen is generally rectangular in shape. It has slots or mounting bases on both sides and the sides for installation. Its external structure is relatively complex. At the same time, as aluminum alloy is a metal material, the price of metal raw materials fluctuates in the market, resulting in high cost of the shell of the smart central control screen.

[0046] To address the aforementioned issues, this application discloses a lightweight injection molding part mold structure for injection molding the outer shell 1 of a smart central control screen. To ensure the hardness of the outer shell 1, this embodiment uses high-strength glass fiber reinforced PC as the injection molding raw material. In order to injection mold a color similar to aluminum alloy (silver), metal powder with colorant is also added to the raw material.

[0047] Reference Figure 3 The mold structure includes a moving mold mechanism 2 and a fixed mold mechanism 3 that cooperate with each other, and then refer to... Figure 4 and Figure 5The moving mold mechanism 2 includes a moving mold plate 21 and a moving mold core 22. The moving mold core 22 is fixedly embedded in the plate surface of the moving mold plate 21 facing the fixed mold mechanism 3. The fixed mold mechanism 3 includes a fixed mold plate 31 and a fixed mold core 32. The fixed mold core 32 is embedded in the plate surface of the fixed mold plate 31 facing the moving mold mechanism 2. When the moving mold mechanism 2 and the fixed mold mechanism 3 are closed, the moving mold core 22 and the moving mold core 32 surround each other to form the forming cavity of the outer shell 1. In addition, the mold structure also includes a side insert mechanism, which is used to form the groove structure of the side wall of the outer shell 1.

[0048] Reference Figure 4 and Figure 5 The side insert mechanism includes a movable wedge block 61, a fixed wedge block 62, an insert 63, and a reset component. The movable wedge block 61 is fixedly mounted on the movable template 21 and is located on one side of the movable mold core 22. The fixed wedge block 62 is slidably connected to the fixed template 31 and is located on one side of the fixed mold core 32. The insert 63 is fixedly connected to the side wall of the fixed wedge block 62 facing the molding cavity. The movable wedge block 61 and the fixed wedge block 62 are wedge-shaped and fitted together. When the movable mold mechanism 2 and the fixed mold mechanism 3 are closed, the movable wedge block 61 pushes the fixed wedge block 62 to move closer to the molding cavity, and the insert 63 is inserted into the molding cavity at the same time to form the groove structure of the side wall of the outer shell 1. A reset element is mounted on the fixed wedge block 62. When the moving mold mechanism 2 and the fixed mold mechanism 3 separate, the reset element pushes the fixed wedge block 62 to move away from the forming mold cavity, thereby resetting the fixed wedge block 62 and the insert 63. (See also...) Figure 6 The reset component is a first reset spring 64, which is located between the fixed wedge block 62 and the fixed mold core 32. One end of the first reset spring 64 is fixedly connected to the fixed wedge block 62, and the other end is fixedly connected to the fixed mold core 32. When the moving mold mechanism 2 and the fixed mold mechanism 3 separate the molds, the first reset spring 64 is in its natural state. At this time, the fixed wedge block 62 and the insert 63 are in their initial positions. When the moving mold mechanism 2 and the fixed mold mechanism 3 close the molds, the first reset spring 64 is squeezed as the insert 63 is inserted into the molding cavity. When the moving mold mechanism 2 and the fixed mold mechanism 3 separate the molds again, the restoring force of the first reset spring 64 after being squeezed pushes the insert 63 away from the molding cavity, so that the fixed wedge block 62 and the insert 63 return to their initial positions.

[0049] Reference Figure 7The moving template 21 is equipped with a glue injection mechanism 4 for injecting glue into the molding cavity. Specifically, the glue injection mechanism 4 includes a main channel 41 and two branch channels 42. One end of each branch channel 42 is connected to the main channel 41, and the other end of each branch channel 42 is connected to both ends of the molding cavity. The two branch channels 42 inject glue into the molding cavity together to improve the production efficiency of the shell 1. At the same time, each branch channel 42 is equipped with an opening and closing component 5 to control the glue injection start time of the two branch channels 42. The glue injection operation of the two branch channels 42 at intervals is beneficial to improve the uniformity of glue flow, and when the two glue streams converge, it is beneficial to improve the melting effect, thereby improving the production quality of the shell 1.

[0050] Reference Figure 7 The opening and closing assembly 5 includes a cylinder 51, a valve needle 52, a solenoid valve 53, and a timing controller 54. The solenoid valve 53 and the timing controller 54 are installed on the outside of the moving template 21. It should be noted that the flow channel 42 is arranged in a straight line. The valve needle 52 moves along the length of the flow channel 42 and passes through the inside of the flow channel 42. The cylinder 51 is installed on the outside of the flow channel 42. The valve needle 52 is connected to the piston rod of the cylinder 51. The cylinder 51, the solenoid valve 53, and the timing controller 54 are electrically connected. Through the control of the timing controller 54, the two flow channels 42 start to inject glue with a time interval.

[0051] After the moving mold mechanism 2 and the fixed mold mechanism 3 close, the injection mechanism 4 injects glue into the molding cavity. Specifically, the timing controller 54 first controls the piston rod of one cylinder 51 to extend and the piston rod of another cylinder 51 to retract via the solenoid valve 53. This causes the valve needle 52 in one sub-channel 42 to block the outlet of the sub-channel 42, while the valve needle 52 in the other sub-channel 42 opens the opening of the sub-channel 42. At this time, only one sub-channel 42 injects glue into the molding cavity. After a time interval of 0.3 seconds, the timing controller 54 then controls the opening of the blocked sub-channel 42 so that both sub-channels 42 inject glue into the molding cavity together. It should be noted that the initial time interval between the two sub-channels 42 is 0.1 seconds to 3 seconds. By adjusting the time interval, the confluence position of the two glue streams is adjusted, improving the weld line after the two glue streams converge, thereby achieving a better molding effect. In addition, both the main channel 41 and the branch channel 42 are equipped with heating elements. When the branch channel 42 is in a closed state, the heating elements heat the plastic material in the main channel 41 and the branch channel 42, keeping the plastic material in a molten state to prevent blockage when the branch channel 42 is opened. This helps to improve the smoothness and stability of the injection operation. In this embodiment, the main channel 41 and the branch channel 42 are heated by electrothermal technology, which will not be described in detail here.

[0052] Reference Figure 6 and Figure 8After the outer shell 1 is cooled and formed in the molding cavity, it needs to be demolded. Since both sides of the outer shell 1 have snap-fit, the mold structure also includes a moving mold demolding mechanism and a fixed mold demolding mechanism 8. The moving mold demolding mechanism is used to push the outer shell 1 out from the moving mold core 22, and the fixed mold demolding mechanism 8 is used to push the outer shell 1 out from the fixed mold core 32, so as to achieve a complete demolding operation.

[0053] Reference Figure 6 and Figure 8 The moving mold demolding mechanism includes a fastening component 71 and a moving mold inclined ejector component 72. The moving mold inclined ejector component 72 is disposed on the moving mold plate 21. When the moving mold mechanism 2 and the fixed mold mechanism 3 separate the molds, the fastening component 71 drives the moving mold inclined ejector component 72 to eject the formed outer shell 1 out of the moving mold core 22.

[0054] Reference Figure 4 and Figure 5 The fastening assembly 71 includes a fastening post 711 and a fastening sleeve 712 with an interference fit. The fastening post 711 is vertically fixed to the surface of the fixed mold core 32 facing the moving mold core 22. The fastening sleeve 712 is vertically inserted into the moving mold core 22, with one end of the fastening sleeve 712 engaging with the fastening post 711 and the other end of the fastening sleeve 712 connected to the moving mold inclined ejector assembly 72. It should be noted that the fastening post 711 and the fastening sleeve 712 are made of soft silicone. When the moving mold mechanism 2 and the fixed mold core 22 are engaged, the fastening sleeve 711 is vertically fixed to the surface of the fixed mold core 32 facing the moving mold core 22. When the mold mechanism 3 closes the mold, the locking post 711 is inserted into the locking cylinder 712 with an interference fit. When the moving mold mechanism 2 and the fixed mold mechanism 3 separate the mold, since the locking post 711 and the locking cylinder 712 are made of soft silicone and have an interference fit, the locking post 711 can pull the locking cylinder 712 to move a certain distance before the locking post 711 and the locking cylinder 712 separate. The locking cylinder 712 simultaneously pulls the moving mold inclined ejector assembly 72 to move, thereby realizing the inclined ejection of the outer shell 1 from the moving mold core 22.

[0055] Reference Figure 8The moving mold inclined ejector assembly 72 includes a moving mold connecting plate 721 and a moving mold inclined ejector rod 722. The moving mold connecting plate 721 is parallel to the moving mold core 22, and the moving mold connecting plate 721 is movably disposed inside the moving mold plate 21 along the direction of mold parting or mold closing. The fastening cylinder 712 passes through the moving mold core 22 and is vertically fixedly connected to the moving mold connecting plate 721. One end of the moving mold inclined ejector rod 722 is connected to the moving mold connecting plate 721, and the other end of the moving mold inclined ejector rod 722 passes through the moving mold core 22. When the moving mold mechanism 2 and the fixed mold mechanism 3 are closed, the end of the moving mold inclined ejector rod 722 is flush with the cavity wall of the forming mold cavity. During the mold separation process, the fastening column 711 pulls the fastening cylinder 712 to move a certain distance. The fastening cylinder 712 simultaneously pulls the moving mold connecting plate 721 to move a certain distance closer to the fixed mold mechanism 3. At this time, the moving mold connecting plate 721 pushes the moving mold inclined ejector rod 722 to move obliquely closer to the fixed mold mechanism 3, so that the moving mold inclined ejector rod 722 pushes the outer shell 1 out obliquely from the moving mold core 22, thereby realizing the demolding operation of the outer shell 1 on the moving mold core 22.

[0056] Reference Figure 4 and Figure 6 After the outer shell 1 detaches from the moving mold core 22, the fixed mold demolding mechanism 8 then detaches the outer shell 1 from the fixed mold core 32. Specifically, the fixed mold demolding mechanism 8 includes a fixed mold connecting plate 81, a fixed mold inclined ejector rod 82, and a second return spring 83. The fixed mold connecting plate 81 is parallel to the fixed mold core 32 and is movably disposed inside the fixed mold plate 31 along the direction of mold splitting or mold closing. One end of the fixed mold inclined ejector rod 82 is connected to the fixed mold connecting plate 81, and the other end of the fixed mold inclined ejector rod 82 passes through the fixed mold core 32. One end of the second return spring 83 is fixedly connected to the fixed mold inclined ejector rod 82, and the other end of the second return spring 83 is fixedly connected to the fixed mold core 32. When the second return spring 83 is in its natural state, the end of the fixed mold inclined ejector rod 82 is flush with the cavity wall of the forming mold cavity. During the demolding process of the outer shell 1 on the fixed mold core 32, the fixed mold connecting plate 81 drives the fixed mold inclined ejector rod 82 to move towards the moving mold mechanism 2, so that the fixed mold inclined ejector rod 82 pushes the outer shell 1 out of the fixed mold core 32 at an angle, thereby completing the complete demolding operation of the finished outer shell 1. After the finished outer shell 1 is pushed out of the fixed mold core 32 at an angle, the second return spring 83 is in a compressed state. The restoring force of the second return spring 83 pushes the fixed mold connecting plate 81 and the fixed mold inclined ejector rod 82 to reset, so as to facilitate the next demolding operation.

[0057] This application also discloses an injection molding method, including the use of the above-mentioned lightweight injection molding part mold structure, comprising the following steps:

[0058] S1: The moving mold mechanism 2 and the fixed mold mechanism 3 close the mold, and the moving mold core 22 and the fixed mold core 32 surround to form a molding cavity. During the mold closing process, the moving wedge block 61 pushes the fixed wedge block 62 to move so that the insert 63 is inserted into the molding cavity. At this time, the moving mold inclined ejector rod 722 and the fixed mold inclined ejector rod 82 are flush with the cavity wall of the molding cavity. The first return spring 64 is in the compressed state, and the second return spring 83 is in the natural state.

[0059] S2: Glue injection, two sub-channels inject glue into the molding cavity at 42-minute intervals, and cool and mold to form the finished shell 1;

[0060] S3: The moving mold mechanism 2 and the fixed mold mechanism 3 separate. During the mold separation process, the restoring force of the first return spring 64 pushes the insert 63 out from the side wall of the finished shell 1 to achieve the reset of the insert 63. At the same time, the fastening column 711 can pull the fastening cylinder 712 to move a certain distance. The fastening cylinder 712 synchronously pulls the moving mold connecting plate 721 to move a certain distance closer to the fixed mold mechanism 3. At this time, the moving mold connecting plate 721 pushes the moving mold inclined ejector rod 722 to move obliquely closer to the fixed mold mechanism 3 so that the moving mold inclined ejector rod 722 pushes the shell 1 obliquely out from the moving mold core 22.

[0061] S4: After the outer shell 1 is ejected from the moving mold core 22, the fixed mold connecting plate 81 drives the fixed mold inclined ejector rod 82 to move towards the moving mold mechanism 2, so that the fixed mold inclined ejector rod 82 ejects the outer shell 1 from the fixed mold core 32, thus completing the demolding operation of the finished outer shell 1. After the finished outer shell 1 is ejected from the fixed mold core 32, the second return spring 83 is in a compressed state. The restoring force of the second return spring 83 pushes the fixed mold connecting plate 81 and the fixed mold inclined ejector rod 82 to reset, so as to facilitate the next demolding operation. The entire production process of the intelligent central control screen outer shell 1 is carried out in conjunction with each functional module, realizing the production of complex outer shell 1 products without increasing the process steps. Moreover, by using injection molding to replace the aluminum alloy outer shell 1, the manufacturing cost of the intelligent central control screen outer shell 1 is reduced while ensuring hardness.

[0062] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lightweight injection molding part mold structure, characterized in that: The housing (1) for injection molding of a smart central control screen has a mold structure including a moving mold mechanism (2) and a fixed mold mechanism (3) that cooperate with each other. The moving mold mechanism (2) includes a moving template (21) and a moving mold core (22), with the moving mold core (22) fixedly embedded in the surface of the moving template (21). The fixed mold mechanism (3) includes a fixed template (31) and a fixed mold core (32), with the fixed mold core (32) embedded in the surface of the fixed template (31). When the moving mold mechanism (2) and the fixed mold mechanism (3) are closed, the... The moving mold core (22) and the moving mold core (22) together form the molding cavity of the outer shell (1). The moving mold core (21) is provided with a glue injection mechanism (4) for injecting glue into the molding cavity. The glue injection mechanism (4) includes a main channel (41) and two branch channels (42). One end of each of the two branch channels (42) is connected to the main channel (41), and the other end of each of the two branch channels (42) is connected to both ends of the molding cavity. Each of the two branch channels (42) is provided with an opening and closing component (5) for opening and closing. It also includes a moving mold demolding mechanism, which includes a fastening component (71) and a moving mold inclined ejector component (72). The moving mold inclined ejector component (72) is disposed on the moving mold plate (21). When the moving mold mechanism (2) and the fixed mold mechanism (3) separate the mold, the fastening component (71) drives the moving mold inclined ejector component (72) to obliquely eject the formed outer shell (1) out of the moving mold core (22). The fastening assembly (71) includes an interference fit fastening post (711) and a fastening sleeve (712). The fastening post (711) is vertically fixed to the fixed mold core (32). The fastening sleeve (712) passes through the moving mold core (22) and is connected to the moving mold inclined ejector assembly (72). The fastening post (711) and the fastening sleeve (712) are made of soft silicone. The moving mold inclined ejector assembly (72) includes a moving mold connecting plate (721) and a moving mold inclined ejector rod (722). The moving mold connecting plate (721) is movably disposed inside the moving mold plate (21). The fastening cylinder (712) passes through the moving mold core (22) and is fixedly connected to the moving mold connecting plate (721). One end of the moving mold inclined ejector rod (722) is connected to the moving mold connecting plate (721), and the other end of the moving mold inclined ejector rod (722) passes through the moving mold core (22). When the moving mold mechanism (2) and the fixed mold mechanism (3) close the mold, the end of the moving mold inclined ejector rod (722) is flush with the cavity wall of the forming mold cavity.

2. The lightweight injection molding part mold structure according to claim 1, characterized in that: The opening and closing assembly (5) includes a cylinder (51), a valve needle (52), a solenoid valve (53), and a timing controller (54). The solenoid valve (53) and the timing controller (54) are installed on the outside of the moving template (21). The valve needle (52) is movably inserted inside the diversion channel (42). The cylinder (51) is installed outside the diversion channel (42). The valve needle (52) is connected to the piston rod of the cylinder (51). The cylinder (51), the solenoid valve (53), and the timing controller (54) are electrically connected. There is a time interval between the start of glue injection in the two diversion channels (42).

3. The lightweight injection molding part mold structure according to claim 1, characterized in that: Both the main flow channel (41) and the branch flow channel (42) are equipped with heating elements.

4. The lightweight injection molding part mold structure according to claim 1, characterized in that: It also includes a side insert mechanism, which includes a moving wedge block (61), a fixed wedge block (62), an insert (63), and a reset member. The moving wedge block (61) is fixedly disposed on the moving template (21), the fixed wedge block (62) is slidably connected to the fixed template (31), and the insert (63) is fixedly connected to the side wall of the fixed wedge block (62) facing the molding cavity. The moving wedge block (61) and the fixed wedge block (62) are wedge-shaped and fitted together. When the moving mold mechanism (2) and the fixed mold mechanism (3) are closed, the moving wedge block (61) pushes the fixed wedge block (62) to move closer to the molding cavity. The reset member is disposed on the fixed wedge block (62). When the moving mold mechanism (2) and the fixed mold mechanism (3) are separated, the reset member pushes the fixed wedge block (62) to move away from the molding cavity.

5. The lightweight injection molding part mold structure according to claim 4, characterized in that: The reset component is configured as a first reset spring (64), one end of which is connected to the fixed wedge block (62), and the other end of which is connected to the fixed mold core (32). When the moving mold mechanism (2) and the fixed mold mechanism (3) separate the mold, the first reset spring (64) is in its natural state.

6. The lightweight injection molding part mold structure according to claim 1, characterized in that: It also includes a mold ejection mechanism (8) for ejecting the outer shell (1) from the mold core (32). The mold ejection mechanism (8) includes a mold connecting plate (81), a mold inclined ejector rod (82), and a second return spring (83). The mold connecting plate (81) is movably disposed inside the mold plate (31). One end of the mold inclined ejector rod (82) is connected to the mold connecting plate (81), and the other end of the mold inclined ejector rod (82) passes through the mold core (32). One end of the second return spring (83) is connected to the mold inclined ejector rod (82), and the other end of the second return spring (83) is connected to the mold core (32). When the second return spring (83) is in its natural state, the end of the mold inclined ejector rod (82) is flush with the cavity wall of the molding cavity.

7. An injection molding method, comprising using the lightweight injection molding part mold structure according to any one of claims 1-6, characterized in that, Includes the following steps: S1: The moving mold mechanism (2) and the fixed mold mechanism (3) close the mold, the moving mold core (22) and the fixed mold core (32) surround to form the forming mold cavity, and the insert (63) is inserted into the forming mold cavity; S2: Injection of glue, two sub-channels (42) inject glue into the molding cavity at time intervals to form the outer shell (1); S3: The moving mold mechanism (2) and the fixed mold mechanism (3) separate the mold. During the mold separation process, the moving mold demolding mechanism pushes the outer shell (1) out from the moving mold core (22) at an angle. S4: After the outer shell (1) is ejected from the moving mold core (22) at an angle, the fixed mold ejection mechanism (8) ejects the outer shell (1) from the fixed mold core (32) at an angle, thus achieving complete material removal.

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