Precision electric vehicle lamp housing injection molding mold

Abstract

A precision injection molding mold for electric vehicle lamp housings includes a cavity plate and a core plate. A cavity frame is located under the cavity plate. The core plate includes mold feet, a core fixing plate, a core plate, and a core. The core has an injection-molded lamp housing. The lamp housing has internal slots for lampshade mounting holes, display screen mounting holes, and frame mounting holes. The cavity frame also includes a lampshade slider and a display screen slider. The lampshade slider has a lampshade oblique guide hole. A lampshade oblique guide block is connected under the cavity plate, and the lampshade oblique guide block mates with the lampshade oblique guide hole. The display screen slider has a display screen oblique guide hole. A display screen oblique guide rod is connected under the cavity plate, and the display screen oblique guide rod mates with the display screen oblique guide hole. A clearance groove is provided in the core and core plate. An inner release slider and an inner slot insert are provided in the clearance groove. An oblique wedge groove is provided on the inner release slider. An oblique wedge block is provided under the cavity frame, and the oblique wedge block mates with the oblique wedge groove. A secondary mold opening structure is provided between the cavity plate and the cavity frame.

Description

Technical Field

[0001] This invention relates to a precision injection molding mold for electric vehicle lamp housings, belonging to the field of injection molding. Background Technology

[0002] There are many types of electric vehicle headlights. One type features a headlight housing that integrates the electric vehicle's LCD screen. This headlight housing consists of a front housing and a rear housing. The front housing has mounting holes for the lamp cover, while the rear housing has mounting holes for the display screen. When the front and rear housings are combined, the lower part forms a frame mounting hole. During production, the front and rear housings are processed separately using two molds and then assembled together. The disadvantages are high development costs for the two molds and the need for manual assembly of the two components, resulting in low production efficiency. Therefore, the applicant has designed a one-piece molded electric vehicle headlight housing and a processing mold for processing this headlight housing. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a precision electric vehicle lamp housing injection mold that utilizes secondary mold opening and mold opening power to achieve inward pulling and pushing of the cavity side slider for demolding. It has a compact internal structure, small overall volume, low cost, and is suitable for processing on small injection molding machines.

[0004] The technical solution of the precision electric vehicle lamp housing injection molding mold of the present invention is as follows: It includes a mold cavity plate and a core plate. A cavity frame is provided under the cavity plate, mold feet are provided on the core plate, a lower top plate and an upper top plate are provided between the mold feet, a core fixing plate is provided on the mold feet, a core plate is provided on the core fixing plate, and a core is provided on the core plate. The core extends into the cavity frame to form a mold cavity, and a lamp housing is injection molded in the mold cavity. A lampshade mounting hole is provided on one side of the lamp housing, a display screen mounting hole is provided on the other side of the lamp housing, and a frame mounting hole is provided at the bottom of the lamp housing. Two inner slots are provided on the inner wall of the frame mounting hole. An ejector pin is connected to the upper top plate, and the ejector pin passes through the core fixing plate and the core to contact the lamp housing. The key feature is that a lampshade slider and a display screen slider are also provided in the cavity frame. The block mates with the lampshade mounting hole, the display screen slider mates with the display screen mounting hole, a lampshade oblique guide hole is provided in the lampshade slider, the lampshade oblique guide block is connected to the bottom of the cavity plate, the lampshade oblique guide block mates with the lampshade oblique guide hole, the display screen slider is provided with the display screen oblique guide hole, the display screen oblique guide rod is connected to the bottom of the cavity plate, the display screen oblique guide rod mates with the display screen oblique guide hole; the core and core plate are provided with clearance grooves corresponding to the two inner slots, an inner release slider is slidably set in the clearance groove, the front end of the inner release slider is provided with an inner slot insert, the inner slot insert mates with the inner slot, an oblique wedge groove is provided on the rear part of the inner release slider, an oblique wedge block is provided under the corresponding cavity frame, the oblique wedge block mates with the oblique wedge groove, a secondary mold opening structure is provided between the cavity plate and the cavity frame.

[0005] The precision electric vehicle lamp housing injection molding mold of the present invention, during demolding, is driven by the injection molding machine to open the mold core part (including core, core plate, core fixing plate, mold feet, upper top plate, lower top plate and core cover plate) from the cavity part (cavity frame and cavity cover plate). However, under the action of the secondary mold opening structure, the cavity frame moves together with the core plate, causing the cavity frame to separate from the cavity cover plate. During the separation process, the lamp cover inclined guide block and the display screen inclined guide rod respectively drive the lamp cover slider and the display screen slider to slide outward through the lamp cover inclined guide hole and the display screen inclined guide hole, respectively, so that the lamp cover slider and the display screen slider respectively move outward from the lamp cover mounting plate. After the lamp housing and display screen mounting holes are removed, the first mold opening is completed. Then, under the action of the secondary mold opening structure, the mold opens a second time, separating the cavity frame from the core plate. The lamp housing remains on the core, and the core plate drives the core and lamp housing to be removed from the cavity frame. At the same time, since the wedge block is set below the cavity frame and does not move, the wedge block pushes the inner release block inward through the wedge groove and slides in the clearance groove, removing the inner slot insert from the inner slot. The inner slot demolding is completed, the mold opening ends, and the upper top plate drives the ejector pin to lift the lamp housing from the core and remove it from the mold. The lamp housing demolding is completed. This solution utilizes a two-stage mold opening process. First, the cavity frame separates from the cavity cover plate, and a slanted guide structure is installed between them to smoothly achieve the internal demolding of the lampshade slider and the display screen slider. Next, the core plate and core separate from the cavity frame. Through a wedge structure, the internal release slider is pushed in the opposite direction, allowing the internal slot insert to smoothly disengage from the internal slot. This solution's electric vehicle lamp housing injection mold features a smooth demolding process, a compact internal structure, and a small overall size, making it particularly suitable for small injection molding machines and saving on equipment investment costs.

[0006] The precision electric vehicle lamp housing injection molding mold of the present invention includes a secondary mold opening structure comprising elastic blocks on both outer walls of the cavity frame, the upper part of the outer end of the elastic blocks being a right angle and the lower part of the outer end of the elastic blocks being an oblique angle; pull rods on both outer walls of the core plate, the pull rods having hooks that engage with the right angles; and pressure rods on both outer walls of the cavity cover plate, the pressure rods having pressure blocks that engage with the oblique angles. During mold opening, the pull hook is engaged at the right angle, causing the cavity frame to move along with the mold core. The cavity frame separates from the cavity cover plate, completing the first mold opening. When the mold opens to the point where the pressure block contacts the bevel, the pressure block compresses the elastic block through the bevel, causing the right angle to disengage from the pull hook. The mold continues to open, separating the cavity frame from the core and cavity plate, completing the second mold opening. The lamp housing remains on the core. After the mold opening is complete, the lower and upper ejector plates are driven by a power source. The upper ejector plate drives the ejector pins to lift the lamp housing from the core and automatically remove it from the mold, or it can be removed manually or by a robot. Because the display screen mounting hole is tilted at a certain angle, the corresponding display screen slider is also tilted in the cavity frame. During injection molding, the pressure inside the mold cavity increases significantly, and the tilted display screen slider is prone to mold expansion. To prevent mold expansion, a locking recess is provided on the display screen slider, and a locking block protrusion is provided on the corresponding cavity cover plate. The locking block protrusion cooperates with the locking recess, and the display screen inclined guide rod is connected to the locking block protrusion. A wear-resistant plate is provided on the inclined guide block of the lampshade, which contacts the inner wall of the inclined guide hole of the lampshade to reduce wear on the inclined guide block and extend its service life. Corresponding positioning holes are provided between the inner release slider and the core plate, and positioning pins are installed in the positioning holes to prevent the inner release slider from coming out of the core plate. Guide strips are provided on both outer walls of the inner release slider, and guide blocks are provided in the corresponding core plates. The guide strips and guide blocks cooperate to guide the inner release slider, ensuring precise sliding and smooth demolding during demolding. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the demolding structure of the lampshade mounting hole and the display screen mounting hole of the present invention;

[0008] Figure 2 This is a schematic diagram of the secondary mold opening structure of the present invention;

[0009] Figure 3 yes Figure 2 A magnified view of part A;

[0010] Figure 4 This is a schematic diagram of the inner slot demolding structure of the present invention;

[0011] Figure 5 This is a three-dimensional schematic diagram of the inner slot demolding of the present invention;

[0012] Figure 6 This is a three-dimensional schematic diagram of the precision electric vehicle lamp housing injection molding mold of the present invention. Implementation

[0013] This invention relates to a precision injection molding mold for electric vehicle lamp housings, such as... Figure 1 — Figure 6 As shown, the mold includes a cavity plate 1 and a core plate 2. A cavity frame 3 is provided under the cavity plate, and mold feet 5 are provided on the core plate. A lower top plate 6 and an upper top plate 7 are provided between the mold feet. A core fixing plate 8 is provided on the mold feet, a core plate 9 is provided on the core fixing plate, and a core 10 is provided on the core plate. The core 10 extends into the cavity frame 3 to form a mold cavity. A lamp housing 11 is injection molded in the mold cavity. A lampshade mounting hole 12 is provided on one side of the lamp housing, and a display screen mounting hole 13 is provided on the other side of the lamp housing. A frame mounting hole is provided at the bottom of the lamp housing. Two inner slots 111 are provided on the inner wall of the frame mounting hole. An ejector pin 14 is connected to the upper top plate 7. The ejector pin 14 passes through the core fixing plate and the core and contacts the lamp housing 11. The cavity frame 3 also provides a lampshade slider 15 and a display screen slider 16. The lampshade slider 15 cooperates with the lampshade mounting hole 12, and the display screen slider 16 cooperates with the display screen mounting hole. The following components are provided: 13. A lampshade inclined guide hole 17 is provided in the lampshade slider 15; a lampshade inclined guide block 18 is connected to the bottom of the cavity plate 1; the lampshade inclined guide block 18 cooperates with the lampshade inclined guide hole 17; a display screen inclined guide hole 19 is provided in the display screen slider 16; a display screen inclined guide rod 20 is connected to the bottom of the cavity plate 1; the display screen inclined guide rod 20 cooperates with the display screen inclined guide hole 19; the core 10 and core plate 9 are provided with clearance grooves 112 corresponding to the two inner slots 111; an inner release slider 113 is slidably provided in the clearance grooves 112; an inner slot insert 114 is provided at the front end of the inner release slider; the inner slot insert 114 cooperates with the inner slot 111; an inclined wedge groove 115 is provided on the rear part of the inner release slider; an inclined wedge block 116 is provided under the corresponding cavity frame 3; the inclined wedge block 116 cooperates with the inclined wedge groove 115; a secondary mold opening structure is provided between the cavity plate 1 and the cavity frame 3.

[0014] During demolding, the injection molding machine drives the core portion of the mold (including core 10, core plate 9, core fixing plate 8, mold feet 5, upper ejector plate 7, lower ejector plate 6, and core cover plate 2) to open from the cavity portion (cavity frame 3 and cavity cover plate 1). However, under the action of the secondary mold opening structure, the cavity frame 3 moves together with the core plate 9, causing the cavity frame 3 to separate from the cavity cover plate 1. During the separation process, the lampshade inclined guide block 18 and the display screen inclined guide rod 20 drive the lampshade slider 15 and the display screen slider 16 to slide outward through the lampshade inclined guide hole 17 and the display screen inclined guide hole 19, respectively, causing the lampshade slider 15 and the display screen slider 16 to disengage from the lampshade mounting hole 12 and the display screen mounting hole 13, respectively. After the lampshade mounting hole and the display screen mounting hole are removed, the first mold opening is completed. Then, under the action of the secondary mold opening structure, the mold opens for the second time, causing the cavity frame 3 to separate from the core plate 9. The lamp housing 11 remains on the core 10. The core plate 9 drives the core 10 and the lamp housing 11 to be removed from the cavity frame 3. At the same time, since the wedge block 116 is set below the cavity frame 3 and does not move, the wedge block 116 pushes the inner release block 113 inward through the wedge groove 115 and slides in the clearance groove 112, removing the inner slot insert 114 from the inner slot 111. The inner slot demolding is completed, and the mold opening ends. The upper top plate 7 drives the ejector pin 14 to lift the lamp housing 11 from the core 10 and remove it from the mold. The lamp housing demolding is completed. This solution utilizes a two-stage mold opening process. First, the cavity frame separates from the cavity cover plate, and a slanted guide structure is installed between them to smoothly achieve the internal demolding of the lampshade slider and the display screen slider. Next, the core plate and core separate from the cavity frame. Through a wedge structure, the internal release slider is pushed in the opposite direction, allowing the internal slot insert to smoothly disengage from the internal slot. This solution's electric vehicle lamp housing injection mold features a smooth demolding process, a compact internal structure, and a small overall size, making it particularly suitable for small injection molding machines and saving on equipment investment costs.

[0015] The secondary mold opening structure includes elastic blocks 21 set on the outer walls of both sides of the cavity frame 3. The upper part of the outer end of the elastic block is a right angle 22, and the lower part of the outer end of the elastic block is an oblique angle 23. Pull rods 25 are set on the outer walls of both sides of the core plate 9. Pull hooks 26 are made on the pull rods and cooperate with the right angle 22. Pressure rods 27 are set on the outer walls of both sides of the cavity cover plate 1. Pressure blocks 28 are made on the pressure rods and cooperate with the oblique angle 23. When the mold is opened, the hook 26 pulls on the right angle 22, causing the cavity frame 3 to move with the core part of the mold. The cavity frame 3 separates from the cavity cover plate 1, thus completing the first mold opening. When the mold is opened to the point where the pressure block 28 contacts the angle 23, the pressure block compresses the elastic block through the angle, causing the right angle 22 to disengage from the hook. The mold continues to open, and the cavity frame separates from the core and cavity plate. The second mold opening is completed, and the lamp housing 11 remains on the core 10. After the mold opening is completed, the lower ejector plate and the upper ejector plate are driven by the power. The upper ejector plate drives the ejector pin 14 to lift the lamp housing from the core 10 and automatically detach it from the mold, or it can be removed manually or by a robot.

[0016] Because the display screen mounting holes are tilted at a certain angle, the corresponding display screen slider is also tilted in the cavity frame. During injection molding, the pressure inside the mold cavity increases significantly, and the tilted display screen slider is prone to mold expansion. To prevent mold expansion, a mold locking recess 30 is provided on the display screen slider 16, and a locking block protrusion 31 is provided on the corresponding cavity cover plate 1. The locking block protrusion 31 cooperates with the mold locking recess 30. The display screen inclined guide rod 20 is connected to the locking block protrusion 31. A wear-resistant plate 32 is provided on the lampshade inclined guide block 18, and the wear-resistant plate 32 contacts the inner wall of the lampshade inclined guide hole 17 to reduce the wear of the lampshade inclined guide block and extend its service life.

[0017] The inner ejector block 113 and the core plate 9 are provided with corresponding positioning holes 117, and positioning pins 118 are provided in the positioning holes. The positioning pins play a positioning role to prevent the inner ejector block from coming out of the core plate. Guide strips 119 are provided on the outer walls of both sides of the inner ejector block 113, and guide blocks 120 are provided in the corresponding core plate 9. The guide strips 119 and guide blocks 120 cooperate to guide the inner ejector block, so that the inner ejector block slides accurately and demolds smoothly during demolding.

Claims

1. A precision electric vehicle lamp housing injection molding mold, comprising a mold cavity plate (1) and a core plate (2), a cavity frame (3) is provided under the cavity plate, mold feet (5) are provided on the core plate, a lower top plate (6) and an upper top plate (7) are provided between the mold feet, a core fixing plate (8) is provided on the mold feet, a core plate (9) is provided on the core fixing plate, a core (10) is provided on the core plate, the core (10) extends into the cavity frame (3) to form a mold cavity, a lamp housing (11) is injection molded in the mold cavity, a lamp cover mounting hole (12) is provided on one side of the lamp housing, a display screen mounting hole (13) is provided on the other side of the lamp housing, a frame mounting hole is provided at the lower part of the lamp housing, two inner slots (111) are provided on the inner wall of the frame mounting hole, an ejector pin (14) is connected on the upper top plate (7), the ejector pin (14) passes through the core fixing plate and the core and contacts the lamp housing (11), characterized in that: The cavity frame (3) is also provided with a lampshade slider (15) and a display screen slider (16). The lampshade slider (15) cooperates with the lampshade mounting hole (12), and the display screen slider (16) cooperates with the display screen mounting hole (13). A lampshade inclined guide hole (17) is provided in the lampshade slider (15). A lampshade inclined guide block (18) is connected to the bottom of the cavity cover plate (1). The lampshade inclined guide block (18) cooperates with the lampshade inclined guide hole (17). A display screen inclined guide hole (19) is provided in the display screen slider (16). A display screen inclined guide rod (20) is connected to the bottom of the cavity cover plate (1). The display screen inclined guide rod (20) cooperates with the display screen inclined guide hole (19). The core (10) and the core plate (9) are provided with clearance grooves (112) corresponding to the two inner slots (111). An inner release slider (113) is slidably provided in the clearance groove (112). An inner slot inlay is provided at the front end of the inner release slider. Block (114), inner slot insert (114) cooperates with inner slot (111), inclined wedge groove (115) is provided on the rear part of the inner release block, inclined wedge block (116) is provided under the corresponding cavity frame (3), inclined wedge block (116) cooperates with inclined wedge groove (115), a secondary mold opening structure is provided between the cavity cover plate (1) and the cavity frame (3), the secondary mold opening structure includes springs on both outer walls of the cavity frame (3). The elastic block (21) has a right angle (22) at the upper part of its outer end and an oblique angle (23) at the lower part of its outer end. Pull rods (25) are provided on the outer walls of both sides of the core plate (9). Pull hooks (26) are provided on the pull rods. The pull hooks (26) cooperate with the right angle (22). Pressure rods (27) are provided on the outer walls of both sides of the cavity plate (1). Pressure blocks (28) are provided on the pressure rods. The pressure blocks (28) cooperate with the oblique angle (23).

2. The precision electric vehicle lamp housing injection molding die as described in claim 1, characterized in that... The display screen slider (16) is provided with a locking recess (30), and the corresponding cavity plate (1) is provided with a locking block protrusion (31). The locking block protrusion (31) cooperates with the locking recess (30). The display screen inclined guide rod (20) is connected to the locking block protrusion (31). The lampshade inclined guide block (18) is provided with a wear-resistant plate (32), and the wear-resistant plate (32) is in contact with the inner wall of the lampshade inclined guide hole (17).

3. The precision electric vehicle lamp housing injection molding die as described in claim 1, characterized in that... A corresponding positioning hole (117) is provided between the inner release slider (113) and the core plate (9), and a positioning pin (118) is provided in the positioning hole. Guide strips (119) are provided on the outer walls of both sides of the inner release slider (113), and guide blocks (120) are provided in the corresponding core plate (9). The guide strips (119) cooperate with the guide blocks (120).

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