Lightweight injection molding part mold structure and injection molding method thereof

Abstract

The invention relates to the technical field of new energy automobile spare part production, and particularly discloses a light-weight injection molding spare part mold structure and an injection molding method thereof.The light-weight injection molding spare part mold structure is used for injection molding of a shell of an intelligent center control screen and 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, 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, the fixed mold core is embedded in the fixed mold plate, and when the movable mold mechanism and the fixed mold mechanism are closed, the movable mold core and the movable mold core define a forming mold cavity of a shell; the glue injection mechanism comprises a main runner and two sub-runners, one ends of the two sub-runners are communicated with the main runner, the other ends of the two sub-runners are communicated with the two ends of the forming mold cavity respectively, and the two sub-runners are provided with opening and closing assemblies for opening and closing. The intelligent central control screen shell has the effect of reducing the manufacturing cost of the intelligent central control screen shell.

Description

Technical Field

[0001] The present application relates to the technical field of production of new energy vehicle parts and components, and in particular to a lightweight injection molding parts and component mold structure and an injection molding method thereof. Background Art

[0002] The smart central control screen of new energy vehicles cooperates with the controller to display specified information, or interact with users. The shell of the smart central control screen is used to install light guide plates, light sources, etc., and is usually made of aluminum alloy.

[0003] Reference Figure 1 and Figure 2 The aluminum alloy shell 1 of the smart central control screen is generally in the shape of a rectangular plate, and its two plate surfaces and sides are provided with slots or mounting seats for installation. Its external structure is relatively complex. At the same time, aluminum alloy is a metal material. As the price of metal raw materials fluctuates in the market, the price of metal is relatively expensive, resulting in a high cost of the shell 1 of the smart central control screen. This problem needs to be solved urgently. Summary of the invention

[0004] In order to help reduce the manufacturing cost of the smart central control screen shell, the present application provides a lightweight injection molding parts mold structure and an injection molding method thereof.

[0005] The present application provides a lightweight injection molding parts mold structure and an injection molding method thereof, which adopts the following technical solutions: A lightweight injection molding spare parts mold structure is used for injection molding the shell of an intelligent central control screen. The mold structure includes a movable mold mechanism and a fixed mold mechanism that cooperate with each other. The movable mold mechanism includes a movable mold plate and a movable mold core. The movable mold core is fixedly embedded in the plate surface of the movable mold plate. The fixed mold mechanism includes a fixed mold plate and a fixed mold core. The fixed mold core is embedded in the plate surface of the fixed mold plate. When the movable mold mechanism and the fixed mold mechanism are molded together, the movable mold core and the movable mold core together form a molding cavity of the shell. The movable mold plate is provided with a glue injection mechanism for injecting glue into the molding cavity. The glue injection mechanism includes a main flow channel and two branch flow channels. One end of the two branch flow channels is connected to the main flow channel, and the other end of the two branch flow channels is respectively connected to the two ends of the molding cavity. The two branch flow channels are provided with an opening and closing component for opening and closing.

[0006] By adopting the above technical scheme, the shell of the smart central control screen is made by injection molding to replace the aluminum alloy shell, which is beneficial to reducing the manufacturing cost of the smart central control screen shell. During the injection molding process of the shell, two branch channels inject glue into the molding cavity, which is beneficial to improving production efficiency. The opening and closing components open and close the branch channels, and the start time of glue injection of the two branch channels can be controlled. The two branch channels perform glue injection operations at intervals, which is beneficial to improving the uniformity of glue flow. When the two streams of glue meet, it is beneficial to improve the intersection sol effect, thereby helping to improve the production quality of the shell.

[0007] 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 movable template, the valve needle is movably arranged inside the diversion channel, the cylinder is installed outside the diversion 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, and there is a time interval between the start of glue injection in the two diversion channels.

[0008] By adopting the above technical solution, the timing controller controls the stretching or contraction operation of the cylinder piston rod through the solenoid valve. When the timing controller controls the cylinder piston rod to perform a stretching operation through the solenoid valve, the cylinder piston rod pushes the valve needle to move so that the valve needle blocks the port of the diverter channel. At this time, the diverter channel cannot perform glue injection operations. When the timing controller controls the cylinder piston rod to perform a contraction operation 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 diverter channel. At this time, the diverter channel can perform glue injection operations, thereby realizing the opening and closing effects of the diverter channel glue injection operations.

[0009] Preferably, both the main flow channel and the branch flow channel are provided with heating elements.

[0010] By adopting the above technical solution, when the branch channel is in a closed state, the heating element heats the plastic raw materials in the main channel and the branch channel, so that the plastic raw materials remain in a molten state to prevent blockage when the branch channel is opened, thereby helping to improve the smoothness and stability of the injection operation.

[0011] Preferably, it also 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 arranged on the movable template, the fixed wedge block is slidably connected to the fixed template, 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 matched, when the movable mold mechanism and the fixed mold mechanism are molded, the movable wedge block pushes the fixed wedge block to move in a direction close to the molding cavity, the reset member is arranged on the fixed wedge block, and when the movable mold mechanism and the fixed mold mechanism are separated, the reset member pushes the fixed wedge block to move in a direction away from the molding cavity.

[0012] By adopting the above technical scheme, in the process of closing the mold of the movable mold mechanism and the fixed mold mechanism, the movable wedge block pushes the fixed wedge block to move in the direction close to the molding cavity through the wedge-shaped cooperation, and the fixed wedge block simultaneously pushes the insert into the molding cavity to form a groove structure on the side wall of the shell. In the process of parting the mold of the movable mold mechanism and the fixed mold mechanism, the movable wedge block moves away from the fixed wedge block to release the push on the fixed wedge block. At the same time, the reset part pushes the fixed wedge block to move in the direction away from the molding cavity, and the fixed wedge block synchronously pulls the insert out of the finished shell product, thereby facilitating the subsequent demolding operation of the shell. The process of the insert entering the molding cavity is synchronized with the process of closing the mold, and the process of the insert being pulled out of the finished shell product is synchronized with the process of parting the mold, so that a groove structure that is easy to install is formed on the side wall of the shell without increasing the process steps, which is convenient and quick.

[0013] Preferably, the return member is configured as a first return spring, one end of the first return spring is connected to the fixed wedge block, and the other end of the first return spring is connected to the fixed mold core, and when the movable mold mechanism and the fixed mold mechanism are separated, the first return spring is in a natural state.

[0014] By adopting the above technical scheme, when the movable mold mechanism and the fixed mold mechanism are separated, the first return spring is in a natural state, and in the process of the movable mold mechanism and the fixed mold mechanism closing the mold, the insert is pushed into the molding cavity. At this time, the first return spring is in an extruded state, and when the movable mold mechanism and the fixed mold mechanism are separated, the restoring force of the first return spring pushes the insert out of the side wall of the finished shell product, thereby realizing the reset of the insert, so as to facilitate the next injection molding operation, automatic reset, and the reset structure is simple and convenient.

[0015] Preferably, it also includes a movable mold demoulding mechanism, which includes a snap-fit ​​assembly and a movable mold tilting assembly, and the movable mold tilting assembly is arranged on the movable mold plate. When the movable mold mechanism and the fixed mold mechanism are separated, the snap-fit ​​assembly drives the movable mold tilting assembly to tilt the formed shell out of the movable mold core.

[0016] Since the molding surface of the shell of the smart central control screen on the movable mold core has buckles, during the demolding process of the shell, the shell needs to be separated from the movable mold core first. During the demolding process of the movable mold mechanism and the fixed mold mechanism, the buckle assembly drives the movable mold inclined ejector assembly to tilt the molded shell out of the movable mold core to achieve the separation of the shell and the movable mold core.

[0017] Preferably, the snap-fit ​​assembly includes a snap-fit ​​column and a snap-fit ​​cylinder with interference fit, the snap-fit ​​column is vertically fixedly connected to the fixed mold core, the snap-fit ​​cylinder is passed through the movable mold core, and the snap-fit ​​cylinder is connected to the movable mold inclined top assembly, and the snap-fit ​​column and the snap-fit ​​cylinder are made of soft silicone.

[0018] By adopting the above technical scheme, when the movable mold mechanism and the fixed mold mechanism are in mold closing, the snap-fitting column is inserted into the snap-fitting cylinder with interference fit, and when the movable mold mechanism and the fixed mold mechanism are separated, since the snap-fitting column and the snap-fitting cylinder are made of soft silicone and have interference fit, before the snap-fitting column and the snap-fitting cylinder are separated, the snap-fitting column can pull the snap-fitting cylinder to move a certain distance, and the snap-fitting cylinder simultaneously pulls the movable mold inclined ejector assembly to move, thereby realizing the inclined ejection of the shell from the movable mold core.

[0019] Preferably, the movable mold lift assembly includes a movable mold connecting plate and a movable mold lift rod, the movable mold connecting plate is movably arranged inside the movable mold plate, the snap-fitting cylinder passes through the movable mold core and is fixedly connected with the movable mold connecting plate, one end of the movable mold lift rod is connected to the movable mold connecting plate, and the other end of the movable mold lift rod is passed through the movable mold core, when the movable mold mechanism and the fixed mold mechanism are closed, the end of the movable mold lift rod is flush with the cavity wall of the molding cavity.

[0020] By adopting the above technical scheme, when the movable mold mechanism and the fixed mold mechanism are in mold closing, the end of the movable mold inclined ejector rod is flush with the cavity wall of the molding cavity; when the movable mold mechanism and the fixed mold mechanism are separated, the snap-fit ​​column pulls the snap-fit ​​cylinder to move a certain distance, and the snap-fit ​​cylinder simultaneously pulls the movable mold connecting plate to move a certain distance toward the fixed mold mechanism. At this time, the movable mold connecting plate pushes the movable mold inclined ejector rod to move obliquely toward the fixed mold mechanism, so that the movable mold inclined ejector rod pushes the shell out of the movable mold core.

[0021] Preferably, it also includes a fixed mold demolding mechanism for ejecting the shell from the fixed mold core, the fixed mold demolding 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 arranged inside the fixed mold plate, one end of the fixed mold inclined ejector rod is connected to the fixed mold connecting plate, the other end of the fixed mold inclined ejector rod is passed 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 a natural state, the end of the fixed mold inclined ejector rod is flush with the cavity wall of the molding cavity.

[0022] Since the molding surface of the shell of the smart central control screen on the fixed mold core also has buckles, during the demolding process of the shell, after the shell is detached from the movable mold core, it also needs to be detached from the fixed mold core. Specifically, the fixed mold connecting plate drives the fixed mold inclined ejector rod to move toward the direction close to the movable mold mechanism, so that the fixed mold inclined ejector rod pushes the shell out from the fixed mold core to complete the complete demolding operation of the finished shell. When the finished shell is pushed out from the fixed mold core, the second reset spring is in an extruded state, and the restoring force of the second reset spring pushes the fixed mold connecting plate and the fixed mold inclined ejector rod to reset, so as to facilitate the next demolding operation.

[0023] An injection molding method, comprising using the above-mentioned lightweight injection molding parts mold structure, comprises the following steps: S1: The movable mold mechanism and the fixed mold mechanism are closed, the movable mold core and the fixed mold core are closed to form a forming cavity, and the insert is inserted into the forming cavity; S2: Glue injection: two branch runners inject glue into the molding cavity at different time intervals to form the shell; S3: The movable mold mechanism and the fixed mold mechanism are separated. During the separation process, the movable mold demoulding mechanism pushes the shell out from the movable mold core obliquely; S4: After the shell is pushed out obliquely from the movable mold core, the fixed mold demoulding mechanism pushes the shell out obliquely from the fixed mold core to achieve complete demoulding.

[0024] By adopting the above technical solution, when it is necessary to form the shell of the intelligent central control screen, the movable mold mechanism and the fixed mold mechanism are molded together, the movable mold core and the fixed mold core are surrounded to form a molding cavity, and the movable wedge block pushes the fixed wedge block to move to push the insert into the molding cavity, and then the glue injection operation is performed. The two branch runners inject glue into the molding cavity at time intervals. The two branch runners perform glue injection operations at intervals, which is beneficial to improve the uniformity of glue flow, and when the two streams of glue meet, it is beneficial to improve the intersection sol effect, thereby improving the production quality of the shell. After the shell in the molding cavity is cooled and formed, the movable mold mechanism and the fixed mold mechanism are separated. During the separation process, the restoring force of the first reset spring pushes the insert out of the side wall of the finished shell, thereby realizing the reset of the insert, so as to facilitate the next injection molding operation, automatic reset, and the reset structure is simple and convenient. At the same time, The snap-fitting column can pull the snap-fitting cylinder to move a certain distance, and the snap-fitting cylinder synchronously pulls the movable mold connecting plate to move a certain distance in the direction close to the fixed mold mechanism. At this time, the movable mold connecting plate pushes the movable mold inclined ejector rod to move obliquely in the direction close to the fixed mold mechanism, so that the movable mold inclined ejector rod pushes the shell out of the movable mold core, and then the fixed mold connecting plate drives the fixed mold inclined ejector rod to move in the direction close to the movable mold mechanism, so that the fixed mold inclined ejector rod pushes the shell out of the fixed mold core, so as to complete the complete demoulding operation of the finished shell. When the finished shell is obliquely ejected from the fixed mold core, the second reset spring is in an extruded state, and the restoring force of the second reset spring pushes the fixed mold connecting plate and the fixed mold inclined ejector rod to reset, so as to facilitate the next demoulding operation. The functional modules of the entire production process of the intelligent central control screen shell are linked to achieve the production of complex shell products without increasing the process steps.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up a cylinder, a valve needle, a solenoid valve and a timing controller, the timing controller controls the stretching or contraction operation of the cylinder piston rod through the solenoid valve. When the timing controller controls the cylinder piston rod to stretch through the solenoid valve, the cylinder piston rod pushes the valve needle to move so that the valve needle blocks the port of the diverter channel. At this time, the diverter channel cannot perform glue injection operations. When the timing controller controls the cylinder piston rod to contract 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 diverter channel. At this time, the diverter channel can perform glue injection operations, thereby realizing the opening and closing of the diverter channel glue injection operation.

[0026] 2. By setting a wedge block, a fixed wedge block, an insert and a reset piece, in the process of closing the mold between the movable mold mechanism and the fixed mold mechanism, the movable wedge block pushes the fixed wedge block to move in the direction close to the molding cavity through the wedge cooperation, and the fixed wedge block simultaneously pushes the insert into the molding cavity to form a groove structure on the side wall of the shell; in the process of parting the mold between the movable mold mechanism and the fixed mold mechanism, the movable wedge block moves away from the fixed wedge block to release the push on the fixed wedge block; at the same time, the reset piece pushes the fixed wedge block to move in the direction away from the molding cavity, and the fixed wedge block synchronously pulls the insert out of the finished shell, thereby facilitating the subsequent demoulding operation of the shell; the process of the insert entering the molding cavity is synchronized with the process of closing the mold, and the process of the insert being pulled out of the finished shell is synchronized with the process of parting the mold, so that a groove structure that is easy to install is formed on the side wall of the shell without increasing the process steps, which is convenient and quick.

[0027] 3. By setting the snap-fitting snap-fitting column and the snap-fitting cylinder, when the movable mold mechanism and the fixed mold mechanism are closed, the snap-fitting column is inserted into the snap-fitting cylinder with interference, and when the movable mold mechanism and the fixed mold mechanism are separated, since the snap-fitting column and the snap-fitting cylinder are made of soft silicone and have interference fit, before the snap-fitting column and the snap-fitting cylinder are separated, the snap-fitting column can pull the snap-fitting cylinder to move a certain distance, and the snap-fitting cylinder synchronously pulls the movable mold inclined ejector assembly to move, thereby realizing the inclined ejection of the shell from the movable mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the intelligent central control screen shell in the prior art.

[0029] Figure 2 It is a structural schematic diagram of the smart central control screen shell from another perspective in the prior art.

[0030] Figure 3 It is a structural schematic diagram of the movable mold mechanism and the fixed mold mechanism when the mold is closed in the embodiment of the present application.

[0031] Figure 4 It is a structural schematic diagram of the movable mold mechanism and the fixed mold mechanism when the mold is separated in the embodiment of the present application.

[0032] Figure 5It is a structural schematic diagram from another perspective when the movable mold mechanism and the fixed mold mechanism are separated from each other in the embodiment of the present application.

[0033] Figure 6 It is a schematic diagram of the structure inside the fixed mold mechanism in the embodiment of the present application.

[0034] Figure 7 It is a structural schematic diagram of the glue injection mechanism in the embodiment of the present application.

[0035] Figure 8 It is a schematic diagram of the structure inside the movable mold mechanism in the embodiment of the present application.

[0036] Description of reference numerals: 1. 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. Glue injection mechanism; 41. Main flow channel; 42. Branch flow channel; 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. Snap-fit ​​assembly; 711. Snap-fit ​​column; 712. Snap-fit ​​cylinder; 72. Moving mold inclined ejector assembly; 721. Moving mold connecting plate; 722. Moving mold inclined ejector rod; 8. Fixed mold demoulding mechanism; 81. Fixed mold connecting plate; 82. Fixed mold inclined ejector rod; 83. Second return spring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 3-8 This application is described in further detail.

[0038] The aluminum alloy shell of the smart central control screen is generally in the shape of a rectangular plate, and its two plate surfaces and sides are provided with slots or mounting seats for installation. Its external structure is relatively complex. At the same time, aluminum alloy is a metal material. As the price of metal raw materials fluctuates in the market, the price of metal is relatively expensive, resulting in high cost of the shell of the smart central control screen.

[0039] In response to the above problems, an embodiment of the present application discloses a lightweight injection molding component mold structure, which is used for injection molding the shell 1 of the smart central control screen. In order to ensure the hardness of the shell 1, the injection molding raw material used in this embodiment is high-strength glass fiber reinforced PC. In order to inject a color similar to aluminum alloy (silver), metal powder with color material is also added to the raw material.

[0040] Reference Figure 3 The mold structure includes a movable mold mechanism 2 and a fixed mold mechanism 3 that cooperate with each other. Figure 4 and Figure 5The movable mold mechanism 2 includes a movable mold plate 21 and a movable mold core 22. The movable mold core 22 is fixedly embedded in the plate surface of the movable 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 movable mold mechanism 2. When the movable mold mechanism 2 and the fixed mold mechanism 3 are molded, the movable mold core 22 and the movable mold core 22 are combined to form a molding cavity of the shell 1. In addition, the mold structure also includes a side insert mechanism, which is used to form a groove structure on the side wall of the shell 1.

[0041] Reference Figure 4 and Figure 5 The side insert mechanism 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 arranged on the moving mold plate 21, and the moving wedge block 61 is located on one side of the moving mold core 22. The fixed wedge block 62 is slidably connected to the fixed mold plate 31, and the fixed wedge block 62 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 moving wedge block 61 and the fixed wedge block 62 are wedge-shaped and matched. When the moving mold mechanism 2 and the fixed mold mechanism 3 are molded, the moving wedge block 61 pushes the fixed wedge block 62 to move toward the molding cavity, and the synchronous insert 63 is inserted into the molding cavity to form a groove structure on the side wall of the shell 1. The reset member is arranged on the fixed wedge block 62. When the movable 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 to reset the fixed wedge block 62 and the insert 63. Figure 6 , the reset member is configured as a first reset spring 64, the first reset spring 64 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, the other end of the first reset spring 64 is fixedly connected to the fixed mold core 32, and when the movable mold mechanism 2 and the fixed mold mechanism 3 are parted, the first reset spring 64 is in a natural state, at which time the fixed wedge block 62 and the insert 63 are in the initial position, when the movable mold mechanism 2 and the fixed mold mechanism 3 are closed, as the insert 63 is inserted into the molding cavity, the first reset spring 64 is squeezed, when the movable mold mechanism 2 and the fixed mold mechanism 3 are parted again, the restoring force of the first reset spring 64 after being squeezed pushes the insert 63 to leave the molding cavity, so that the fixed wedge block 62 and the insert 63 return to their initial positions.

[0042] Reference Figure 7The movable template 21 is provided 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 the two branch channels 42 is connected to the main channel 41, and the other ends of the two branch channels 42 are respectively connected to the two ends of the molding cavity. The two branch channels 42 jointly inject glue into the molding cavity to improve the production efficiency of the shell 1. At the same time, the two branch channels 42 are provided with an opening and closing component 5 for opening and closing to control the start time of the glue injection of the two branch channels 42. The two branch channels 42 perform glue injection operations at intervals, which is beneficial to improving the uniformity of glue flow, and when the two streams of glue meet, it is beneficial to improve the intersection sol effect, thereby helping to improve the production quality of the shell 1.

[0043] 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 movable template 21. It should be noted that the branch channel 42 is arranged in a straight line, and the valve needle 52 is movably arranged inside the branch channel 42 along the length direction of the branch channel 42. The cylinder 51 is installed outside the branch channel 42, and 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 branch channels 42 start to inject glue with a time interval.

[0044] When the movable mold mechanism 2 and the fixed mold mechanism 3 are closed, the glue injection mechanism 4 performs glue injection operation into the molding cavity. Specifically, the timing controller 54 first controls the extension of the piston rod of a cylinder 51 through the solenoid valve 53, and controls the contraction of the piston rod of another cylinder 51, so that the valve needle 52 in one branch channel 42 blocks the outlet of the branch channel 42, and the valve needle 52 in the other branch channel 42 opens the opening of the branch channel 42. At this time, only one branch channel 42 performs glue injection operation on the molding cavity. After a time interval of 0.3 seconds, the timing controller 54 controls to open the blocked branch channel 42, so that the two branch channels 42 perform glue injection operation on the molding cavity together. It should be noted that the initial time interval for glue injection of the two branch channels 42 is 0.1 seconds-3 seconds. The time interval is adjusted to adjust the intersection position of the two glue strands, and the weld line after the intersection of the two glue strands is improved, thereby achieving a better molding effect. In addition, both the main channel 41 and the branch channel 42 are provided with heating elements. When the branch channel 42 is in a closed state, the heating element heats the plastic raw materials in the main channel 41 and the branch channel 42, so that the plastic raw materials remain in a molten state to prevent blockage when the branch channel 42 is opened, thereby facilitating the improvement of the smoothness and stability of the injection operation. In this embodiment, the main channel 41 and the branch channel 42 are heated by electric heating technology, which will not be elaborated here.

[0045] Reference Figure 6 and Figure 8After the shell 1 is cooled and formed in the molding cavity, a demolding operation needs to be performed. Since both panels of the shell 1 have buckles, the mold structure also includes a movable mold demolding mechanism and a fixed mold demolding mechanism 8. The movable mold demolding mechanism is used to eject the shell 1 from the movable mold core 22, and the fixed mold demolding mechanism 8 is used to eject the shell 1 from the fixed mold core 32 to achieve a complete demolding operation.

[0046] Reference Figure 6 and Figure 8 The movable mold demoulding mechanism includes a snap-fit ​​assembly 71 and a movable mold tilting assembly 72. The movable mold tilting assembly 72 is arranged on the movable mold plate 21. When the movable mold mechanism 2 and the fixed mold mechanism 3 are separated, the snap-fit ​​assembly 71 drives the movable mold tilting assembly 72 to tilt the formed shell 1 out of the movable mold core 22.

[0047] Reference Figure 4 and Figure 5 The buckle assembly 71 includes a buckle column 711 and a buckle cylinder 712 with interference fit. The buckle column 711 is vertically fixedly connected to the surface of the fixed mold core 32 facing the movable mold core 22. The buckle cylinder 712 is vertically penetrated in the movable mold core 22, and one end of the buckle cylinder 712 cooperates with the buckle column 711, and the other end of the buckle cylinder 712 is connected to the movable mold inclined top assembly 72. It should be noted that the buckle column 711 and the buckle cylinder 712 are made of soft silicone. When the movable mold mechanism 2 and the fixed mold mechanism 2 are When the mold mechanism 3 is closed, the snap-fitting column 711 is inserted into the snap-fitting cylinder 712 with interference fit. When the movable mold mechanism 2 and the fixed mold mechanism 3 are separated, since the snap-fitting column 711 and the snap-fitting cylinder 712 are made of soft silicone and have interference fit, before the snap-fitting column 711 and the snap-fitting cylinder 712 are separated, the snap-fitting column 711 can pull the snap-fitting cylinder 712 to move a certain distance, and the snap-fitting cylinder 712 simultaneously pulls the movable mold inclined ejector assembly 72 to move, thereby realizing the inclined ejection of the shell 1 from the movable mold core 22.

[0048] Reference Figure 8The movable mold inclined ejector assembly 72 includes a movable mold connecting plate 721 and a movable mold inclined ejector rod 722. The movable mold connecting plate 721 is parallel to the movable mold core 22, and the movable mold connecting plate 721 is movably arranged inside the movable mold plate 21 along the direction of mold separation or mold closing. The locking tube 712 passes through the movable mold core 22 and is vertically fixedly connected to the movable mold connecting plate 721. One end of the movable mold inclined ejector rod 722 is connected to the movable mold connecting plate 721, and the other end of the movable mold inclined ejector rod 722 is penetrated through the movable mold core 22. When the movable mold mechanism 2 and the fixed mold mechanism 3 are in mold closing, the end of the movable mold inclined ejector rod 722 is flush with the cavity wall of the molding cavity. In the process of mold separation, the snap-fit ​​column 711 pulls the snap-fit ​​cylinder 712 to move a certain distance, and the snap-fit ​​cylinder 712 simultaneously pulls the movable mold connecting plate 721 to move a certain distance toward the fixed mold mechanism 3. At this time, the movable mold connecting plate 721 pushes the movable mold inclined ejector rod 722 to move obliquely toward the fixed mold mechanism 3, so that the movable mold inclined ejector rod 722 pushes the shell 1 out of the movable mold core 22, thereby realizing the demoulding operation of the shell 1 on the movable mold core 22.

[0049] Reference Figure 4 and Figure 6 When the shell 1 is detached from the movable mold core 22, the fixed mold demolding mechanism 8 detaches the 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 the fixed mold connecting plate 81 is movably arranged inside the fixed mold plate 31 along the direction of mold separation 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 is penetrated into 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 a natural state, the end of the fixed mold inclined ejector rod 82 is flush with the cavity wall of the molding cavity. During the demoulding process of the 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 direction close to the movable mold mechanism 2, so that the fixed mold inclined ejector rod 82 pushes the shell 1 out from the fixed mold core 32 to complete the complete demoulding operation of the finished shell 1. When the finished shell 1 is pushed out from the fixed mold core 32, the second return spring 83 is in a squeezed state, and 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 demoulding operation.

[0050] The present application also discloses an injection molding method, which includes using the above-mentioned lightweight injection molding parts mold structure, and includes the following steps: S1: The movable mold mechanism 2 and the fixed mold mechanism 3 are molded together, and the movable mold core 22 and the fixed mold core 32 are surrounded to form a molding cavity. During the mold closing process, the movable wedge block 61 pushes the fixed wedge block 62 to move so as to insert the insert 63 into the molding cavity. At this time, the movable 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 a squeezed state, and the second return spring 83 is in a natural state; S2: Glue injection: two branch runners 42 inject glue into the molding cavity at intervals, and cool to form a finished shell 1; S3: The movable mold mechanism 2 and the fixed mold mechanism 3 are separated. During the separation process, the restoring force of the first reset spring 64 pushes the insert 63 out of the side wall of the finished shell 1 to achieve the reset of the insert 63. At the same time, the buckle column 711 can pull the buckle cylinder 712 to move a certain distance, and the buckle cylinder 712 synchronously pulls the movable mold connecting plate 721 to move a certain distance in the direction close to the fixed mold mechanism 3. At this time, the movable mold connecting plate 721 pushes the movable mold inclined ejector rod 722 to move obliquely in the direction close to the fixed mold mechanism 3, so that the movable mold inclined ejector rod 722 pushes the shell 1 out of the movable mold core 22; S4: After the shell 1 is pushed out from the movable mold core 22, the fixed mold connecting plate 81 drives the fixed mold inclined ejector rod 82 to move in the direction close to the movable mold mechanism 2, so that the fixed mold inclined ejector rod 82 pushes the shell 1 out from the fixed mold core 32 to complete the complete demolding operation of the finished shell 1. When the finished shell 1 is pushed out from the fixed mold core 32, the second reset spring 83 is in an extruded state. The restoring force of the second reset 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 functional modules of the entire production process of the smart central control screen shell 1 are linked to each other, and the production of complex shell 1 products can be achieved without increasing the process steps. By using injection molding to replace the aluminum alloy shell 1, while ensuring the hardness, it is beneficial to reduce the manufacturing cost of the smart central control screen shell 1.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lightweight injection molding parts mold structure, characterized by: A housing (1) for injection molding an intelligent central control screen, wherein the mold structure comprises a movable mold mechanism (2) and a fixed mold mechanism (3) that cooperate with each other, wherein the movable mold mechanism (2) comprises a movable mold plate (21) and a movable mold core (22), wherein the movable mold core (22) is fixedly embedded in the plate surface of the movable mold plate (21), and the fixed mold mechanism (3) comprises a fixed mold plate (31) and a fixed mold core (32), wherein the fixed mold core (32) is embedded in the plate surface of the fixed mold plate (31), and when the movable mold mechanism (2) and the fixed mold mechanism (3) are molded together, the movable mold mechanism (2) and the fixed mold mechanism (3) are molded together. The movable mold core (22) and the movable mold core (22) together form a molding cavity of the shell (1); the movable mold plate (21) is provided with a glue injection mechanism (4) for injecting glue into the molding cavity; the glue injection mechanism (4) comprises a main flow channel (41) and two branch flow channels (42); one end of the two branch flow channels (42) are both connected to the main flow channel (41); the other ends of the two branch flow channels (42) are respectively connected to the two ends of the molding cavity; the two branch flow channels (42) are both provided with an opening and closing component (5) for opening and closing.

2. A lightweight injection molding component mold structure according to claim 1, characterized in that: The opening and closing component (5) comprises 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 outer side of the movable template (21); the valve needle (52) is movably arranged inside the branch channel (42); the cylinder (51) is installed outside the branch 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; and there is a time interval between the start of glue injection in the two branch channels (42).

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

4. A lightweight injection molding component mold structure according to claim 1, characterized in that: The invention also comprises a side insert mechanism, wherein the side insert mechanism comprises a movable wedge block (61), a fixed wedge block (62), an insert block (63) and a reset member, wherein the movable wedge block (61) is fixedly arranged on the movable mold plate (21), the fixed wedge block (62) is slidably connected to the fixed mold plate (31), the insert block (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 matched, when the movable mold mechanism (2) and the fixed mold mechanism (3) are molded, the movable wedge block (61) pushes the fixed wedge block (62) to move in a direction close to the molding cavity, and the reset member is arranged on the fixed wedge block (62), and when the movable mold mechanism (2) and the fixed mold mechanism (3) are separated, the reset member pushes the fixed wedge block (62) to move in a direction away from the molding cavity.

5. A lightweight injection molding component mold structure according to claim 4, characterized in that: The return member is configured as a first return spring (64), one end of the first return spring (64) is connected to the fixed wedge block (62), and the other end of the first return spring (64) is connected to the fixed mold core (32). When the movable mold mechanism (2) and the fixed mold mechanism (3) are separated, the first return spring (64) is in a natural state.

6. A lightweight injection molding component mold structure according to claim 1, characterized in that: The invention also comprises a movable mold demoulding mechanism, wherein the movable mold demoulding mechanism comprises a snap-fit ​​assembly (71) and a movable mold inclined ejection assembly (72), wherein the movable mold inclined ejection assembly (72) is arranged on the movable mold plate (21), and when the movable mold mechanism (2) and the fixed mold mechanism (3) are separated from each other, the snap-fit ​​assembly (71) drives the movable mold inclined ejection assembly (72) to obliquely eject the molded shell (1) out of the movable mold core (22).

7. A lightweight injection molding component mold structure according to claim 6, characterized in that: The snap-fit ​​assembly (71) comprises a snap-fit ​​column (711) and a snap-fit ​​cylinder (712) with interference fit, wherein the snap-fit ​​column (711) is vertically fixedly connected to the fixed mold core (32), the snap-fit ​​cylinder (712) is penetrated through the movable mold core (22), and the snap-fit ​​cylinder (712) is connected to the movable mold inclined top assembly (72), and the snap-fit ​​column (711) and the snap-fit ​​cylinder (712) are made of soft silicone.

8. A lightweight injection molding component mold structure according to claim 7, characterized in that: The movable mold inclined ejector assembly (72) comprises a movable mold connecting plate (721) and a movable mold inclined ejector rod (722); the movable mold connecting plate (721) is movably arranged inside the movable mold plate (21); the locking tube (712) passes through the movable mold core (22) and is fixedly connected to the movable mold connecting plate (721); one end of the movable mold inclined ejector rod (722) is connected to the movable mold connecting plate (721); the other end of the movable mold inclined ejector rod (722) passes through the movable mold core (22); when the movable mold mechanism (2) and the fixed mold mechanism (3) are molded together, the end of the movable mold inclined ejector rod (722) is flush with the cavity wall of the molding cavity.

9. The lightweight injection molding component mold structure according to claim 1, characterized in that: The invention also comprises a fixed mold demoulding mechanism (8) for ejecting the shell (1) from the fixed mold core (32), wherein the fixed mold demoulding mechanism (8) comprises a fixed mold connecting plate (81), a fixed mold inclined ejector rod (82) and a second return spring (83), wherein the fixed mold connecting plate (81) is movably arranged inside the fixed mold plate (31), 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) is passed through the fixed mold core (32), one end of the second return spring (83) is connected to the fixed mold inclined ejector rod (82), and the other end of the second return spring (83) is connected to the fixed mold inclined ejector rod (82), and the other end of the second return spring (83) is connected to the fixed mold core (32), and when the second return spring (83) is in a natural state, the end of the fixed mold inclined ejector rod (82) is flush with the cavity wall of the molding cavity.

10. An injection molding method, comprising using the lightweight injection molding component mold structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The movable mold mechanism (2) and the fixed mold mechanism (3) are closed, the movable mold core (22) and the fixed mold core (32) are closed to form a molding cavity, and the insert (63) is inserted into the molding cavity; S2: Injecting glue, two branch channels (42) inject glue into the molding cavity at different time intervals to form the shell (1); S3: The movable mold mechanism (2) and the fixed mold mechanism (3) are separated. During the separation process, the movable mold demoulding mechanism pushes the housing (1) out of the movable mold core (22) at an angle. S4: After the shell (1) is pushed out obliquely from the movable mold core (22), the fixed mold demoulding mechanism (8) pushes the shell (1) out obliquely from the fixed mold core (32), thereby achieving complete demoulding.

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