Double-station type display rear shell injection mold

Abstract

The utility model discloses a double-station type display rear shell injection mold, and aims to solve the problems that an existing display rear shell is usually subjected to one-to-one injection molding, so that the display rear shell is easy to damage in the demolding process, and the efficiency is low when a single display rear shell is subjected to injection molding each time. The mold comprises a movable mold and a fixed mold, the movable mold comprises an upper fixing plate, a runner plate and a movable mold plate, an injection molding opening is formed in the upper fixing plate, six pouring inlets are formed in the runner plate through runners, the six pouring inlets are divided into two groups, the fixed mold comprises a lower fixing plate and a fixed mold plate, and an ejection assembly is arranged between the lower fixing plate and the fixed mold plate. According to the utility model, the two independent mold cavities are designed, the injection molding conditions of the two mold cavities can be accurately controlled and are kept consistent, the quality of the produced display rear shell is more stable, and compared with a single-station injection mold, the double quantity of display rear shells can be produced within the same time, so that the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of display back shell injection molding technology, specifically relating to a dual-station display back shell injection mold. Background Technology

[0002] In today's digital age, displays, as key devices for information transmission, are widely used in various fields, from personal computers and smartphones to large commercial display screens, and their market demand continues to grow. The back cover of a display, as an important component, not only protects the internal electronic components but also significantly impacts the display's appearance, heat dissipation performance, and overall stability. Injection molds, as crucial tools in the production of display back covers, directly determine the quality, production efficiency, and cost of the back cover through their design and manufacturing level.

[0003] Existing monitor back covers are typically injection molded one-to-one, such as Figure 7 As shown, for some small monitor back covers, due to their irregular shape, it is more troublesome to remove the monitor back cover products. This can easily lead to damage to the monitor back cover during the demolding process, resulting in defects such as cracks, deformation, and broken clips. In addition, injection molding each time a single monitor back cover is made will result in low injection molding efficiency. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dual-station display back shell injection mold. This mold is designed to solve the problem that the existing display back shells are usually injected one-to-one, which is not only prone to damage during demolding, but also has low efficiency due to the injection of a single display back shell each time.

[0006] (2) Technical solution

[0007] To solve the above-mentioned technical problems, this utility model provides a dual-station display back shell injection mold. The mold includes a moving mold and a fixed mold. The moving mold includes an upper fixed plate, a runner plate, and a moving template. The upper fixed plate has an injection port, and the runner plate has six sprues arranged through runners. The six sprues are divided into two groups. The fixed mold includes a lower fixed plate and a fixed template. An ejector assembly is provided between the lower fixed plate and the fixed template. The left and right sides of the upper surface of the fixed template have mounting grooves. A core-pulling mold slides inside the mounting grooves. When the moving mold and the fixed mold are closed, two display back shell cavities are formed. The two ends of the two groups of sprues are respectively connected to the injection port and the two display back shell cavities. The ejector assembly is used to eject the two formed display back shells.

[0008] Preferably, two moving mold cores and two fixed mold cores are fixedly connected to the side of the moving mold and the fixed mold that are close to each other. After the moving mold and the fixed mold are closed, the display back shell mold cavity is formed by the moving mold cores, the fixed mold cores and the core pulling mold.

[0009] Furthermore, a movable block is fixedly connected to the outer side of the core-pulling mold, and a groove is provided on the lower surface of the movable block. A spring is installed between the movable block and the fixed mold core, and a slider is fixedly connected to the inner bottom wall of the mounting groove. The slider is slidably connected inside the groove.

[0010] Furthermore, grooves are provided on both the left and right sides of the lower surface of the moving template. A mounting base is fixedly connected inside the groove by screws. An inclined rod is fixedly connected inside the mounting base. The bottom end of the inclined rod gradually slopes outward from the moving template. An inclined hole corresponding to the inclined rod is provided on the upper surface of the movable block.

[0011] Furthermore, the ejection assembly includes a movable top plate that is slidably connected to the upper surface of the lower fixed plate. Multiple ejector pins are installed on the upper surface of the movable top plate, and the top ends of the ejector pins extend into the interior of the fixed mold core. Connecting seats are fixedly connected to the left and right sides of the lower fixed plate and the fixed mold plate.

[0012] Furthermore, the ejector pin includes an ejector pin and an angled ejector pin. The top of the angled ejector pin extends into the interior of the fixed mold core and forms an undercut. The bottom of the angled ejector pin is slidably connected to the movable top plate.

[0013] Furthermore, guide holes are provided at the four corners of the lower surface of the moving template, and guide posts corresponding to the guide holes are fixedly connected at the four corners of the upper surface of the fixed template.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention features two independent mold cavities, allowing for simultaneous injection molding. The injection conditions in both cavities, such as temperature, pressure, and injection time, can be precisely controlled and kept consistent, resulting in more stable quality and better product consistency of the produced display back covers. This improves the product qualification rate. Furthermore, compared to single-station injection molds, it can produce twice the number of display back covers in the same amount of time, significantly increasing production efficiency.

[0017] During demolding, the inclined rod on the moving mold drives the movable block and the core-pulling mold to slide outward and separate from the display back shell mold cavity. At the same time, the buckle at the top of the inclined ejector rod disengages from the buckle formed on the display back shell, thereby quickly and effectively ejecting the display back shell from the lower mold core through the ejection assembly, avoiding damage to the display back shell during the demolding process. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a front view cross-sectional structural diagram of this utility model.

[0020] Figure 3 This is a front view cross-sectional structural diagram of this utility model.

[0021] Figure 4 This is the utility model Figure 3 A magnified structural diagram of point A in the middle.

[0022] Figure 5 This is a schematic diagram of the structure of the moving template of this utility model.

[0023] Figure 6 This is a schematic diagram of the fixed template of this utility model.

[0024] Figure 7 This is a schematic diagram of the existing display back cover structure.

[0025] The labels in the attached diagram are as follows: 1. Moving mold; 2. Fixed mold; 3. Upper fixed plate; 4. Runner plate; 5. Moving mold plate; 6. Injection port; 7. Sprue; 8. Lower fixed plate; 9. Fixed mold plate; 10. Ejector assembly; 11. Mounting slot; 12. Core-pulling mold; 13. Display back shell mold cavity; 14. Moving mold core; 15. Fixed mold core; 1201. Movable block; 1202. Slide groove; 1203. Spring; 1204. Slider; 1205. Groove; 1206. Mounting base; 1207. Angled rod; 1208. Angled hole; 1001. Movable top plate; 1002. Ejector pin; 1003. Connecting base; 1004. Ejector pin; 1005. Angled ejector pin; 1006. Undercut; 501. Guide hole; 502. Guide post; 001. Existing display back shell. Detailed Implementation

[0026] This specific embodiment is a dual-station display back shell injection mold, the structural schematic diagram of which is shown below. Figures 1-7As shown, the mold includes a moving mold 1 and a fixed mold 2. The moving mold 1 includes an upper fixed plate 3, a runner plate 4, and a moving template 5. The upper fixed plate 3 has an injection port 6. The runner plate 4 has six sprues 7 arranged through the runner. The six sprues 7 are divided into two groups. The fixed mold 2 includes a lower fixed plate 8 and a fixed template 9. An ejector assembly 10 is arranged between the lower fixed plate 8 and the fixed template 9. The left and right sides of the upper surface of the fixed template 9 have mounting grooves 11. A core-pulling mold 12 slides inside the mounting grooves 11. When the moving mold 1 and the fixed mold 2 are closed, two display back shell cavities 13 are formed. The parts that need to be core-pulled in the two display back shell cavities 13 are arranged on the outside. The two ends of the two groups of sprues 7 are connected to the injection port 6 and the two display back shell cavities 13, respectively. In this way, during injection, the material passes through the injection port 6 and enters the two display back shell cavities 13 along the six sprues 7. After cooling, the display back shell is formed. The ejector assembly 10 is used to eject the two formed display back shells.

[0027] like Figure 1 , Figure 2 and Figure 5 As shown: In this embodiment, two moving mold cores 14 and two fixed mold cores 15 are fixedly connected to the side of the moving mold 5 and the fixed mold 9 that are close to each other. After the moving mold 1 and the fixed mold 2 are closed, the display back shell cavity 13 is formed by the moving mold cores 14, the fixed mold cores 15 and the core-pulling mold 12. The core-pulling mold 12 is part of the display back shell cavity 13. It cooperates with the moving mold cores 14 and the fixed mold cores 15 to injection mold the display back shell after the mold is closed.

[0028] like Figure 1 , Figure 3 and Figure 4 As shown: In this embodiment, a movable block 1201 is fixedly connected to the outer side of the core-pulling mold 12. A groove 1202 is provided on the lower surface of the movable block 1201. A spring 1203 is installed between the movable block 1201 and the fixed mold core 15. A slider 1204 is fixedly connected to the inner bottom wall of the mounting groove 11. The slider 1204 is slidably connected inside the groove 1202. The two ends of the spring 1203 are fixedly connected. When the movable mold 1 and the fixed mold 2 are closed, the spring 1203 will be compressed. When the movable mold 1 and the fixed mold 2 are separated, the spring 1203 can assist in pushing the movable block 1201 to slide outward along the slider 1204, so that the movable block 1201 and the core-pulling mold 12 move more stably.

[0029] like Figure 3 , Figure 4 and Figure 6As shown: In this embodiment, grooves 1205 are provided on both the left and right sides of the lower surface of the moving template 5. The mounting base 1206 is fixedly connected to the inside of the groove 1205 by screws. The inclined rod 1207 is fixedly connected to the inside of the mounting base 1206. The bottom end of the inclined rod 1207 gradually tilts towards the outside of the moving template 5. The upper surface of the movable block 1201 is provided with an inclined hole 1208 corresponding to the inclined rod 1207. The moving mold 1 and the fixed mold 2 are separated by a press. At this time, the moving template 5 drives the inclined rod 1207 to move upward. Since the bottom end of the inclined rod 1207 gradually tilts towards the outside of the fixed template 9, the inclined rod 1207 can drive the movable block 1201 and the core-pulling mold 12 to slide outward and separate from the display back shell mold cavity 13 during the sliding process in the inclined hole 1208, which facilitates the demolding of the display back shell.

[0030] like Figure 1 and Figure 3 As shown: In this embodiment, the ejection assembly 10 includes a movable top plate 1001 slidably connected to the upper surface of the lower fixed plate 8. A slide rod is fixedly connected between the lower fixed plate 8 and the fixed mold plate 9. The movable top plate 1001 is slidably sleeved on the outer surface of the slide rod, and a return spring is sleeved on the outer surface of the slide rod. A plurality of demolding ejector rods 1002 are installed on the upper surface of the movable top plate 1001. The top end of the demolding ejector rod 1002 extends into the interior of the fixed mold core 15. Connecting seats 1003 are fixedly connected to the left and right sides of the lower fixed plate 8 and the fixed mold plate 9. In this way, by pushing the movable top plate 1001, the demolding ejector rods 1002 can be driven to move upward, thereby detaching the formed display back cover from the fixed mold core 15.

[0031] like Figure 1 and Figure 2 As shown: In this embodiment, the ejector pin 1002 includes an ejector pin 1004 and an inclined ejector pin 1005. The top end of the inclined ejector pin 1005 extends into the interior of the fixed mold core 15 and forms an undercut 1006. The undercut 1006 is part of the mold cavity 13 of the display back shell. During injection molding, it can form a snap fastener for the display back shell. During demolding, since the inclined ejector pin 1005 is inclined and its bottom end can slide left and right with the movable top plate 1001, the inclined ejector pin 1005 can gradually move inward after moving upward. Finally, the undercut 1006 at the top end of the inclined ejector pin 1005 disengages from the snap fastener formed on the display back shell, and the bottom end of the inclined ejector pin 1005 is slidably connected to the movable top plate 1001. A mounting block is fixedly connected to the movable top plate 1001, and an elongated hole is provided on the mounting block. A pin is fixedly connected to the bottom end of the inclined ejector pin 1005 and slidably connected inside the elongated hole.

[0032] like Figure 1 , Figure 6 and Figure 7As shown: In this embodiment, guide holes 501 are provided at the four corners of the lower surface of the moving template 5, and guide posts 502 corresponding to the guide holes 501 are fixedly connected at the four corners of the upper surface of the fixed template 9. The moving template 5 and the fixed template 9 are separated by a press. At this time, the guide posts 502 can slide in the guide holes 501. When the moving template 5 and the fixed template 9 are closed, the guide posts 502 and the guide holes 501 cooperate to achieve more precise mold closing.

[0033] Working principle: During injection molding, the material enters the two display back shell mold cavities 13 through the injection port 6 and the six sprues 7 respectively, until the material cools and forms the two display back shells. By designing two independent mold cavities, injection molding can be performed simultaneously. Compared to single-station injection molds, this allows for the production of twice the number of display back shells in the same amount of time, significantly improving production efficiency. Then, the moving mold 1 and the fixed mold 2 are separated by a press. At this time, the moving platen 5 drives the inclined rod 1207 to move upwards. As the bottom end of the inclined rod 1207 gradually tilts towards the outside of the fixed platen 9, the inclined rod 1207 slides within the inclined hole 1208. The movable block 1201 and the core-pulling mold 12 slide outward and disengage from the display back shell mold cavity 13. Then, the movable top plate 1001 is pushed to move the demolding ejector pin 1002 upward, thus separating the formed display back shell from the fixed mold core 15. At the same time, since the inclined ejector pin 1005 is inclined and its bottom end can slide left and right with the movable top plate 1001, the inclined ejector pin 1005 can gradually move inward after moving upward. Finally, the undercut 1006 at the top of the inclined ejector pin 1005 disengages from the buckle formed on the display back shell, thereby quickly and effectively ejecting the display back shell from the fixed mold core 15 and avoiding damage to the display back shell during the demolding process.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A dual-station injection mold for a display back cover, the mold comprising a moving mold (1) and a fixed mold (2), characterized in that: The moving mold (1) includes an upper fixed plate (3), a runner plate (4), and a moving template (5). The upper fixed plate (3) has an injection port (6). The runner plate (4) has six sprues (7) arranged through the runner. The six sprues (7) are divided into two groups. The fixed mold (2) includes a lower fixed plate (8) and a fixed template (9). An ejector assembly (10) is provided between the lower fixed plate (8) and the fixed template (9). Mounting grooves (11) are provided on both the left and right sides of the upper surface of the fixed template (9). A core-pulling mold (12) slides inside the mounting groove (11). When the moving mold (1) and the fixed mold (2) are closed, two display back shell cavities (13) are formed. The two ends of the two groups of sprues (7) are respectively connected to the injection port (6) and the two display back shell cavities (13). The ejector assembly (10) is used to eject the two formed display back shells.

2. The dual-station display back shell injection mold according to claim 1, characterized in that, Two moving mold cores (14) and two fixed mold cores (15) are fixedly connected to the side of the moving mold (5) and the fixed mold (9) respectively. After the moving mold (1) and the fixed mold (2) are closed, the display back shell cavity (13) is formed by the moving mold core (14), the fixed mold core (15) and the core pulling mold (12).

3. The dual-station display back shell injection mold according to claim 2, characterized in that, A movable block (1201) is fixedly connected to the outer side of the core-pulling mold (12). A sliding groove (1202) is provided on the lower surface of the movable block (1201). A spring (1203) is installed between the movable block (1201) and the fixed mold core (15). A slider (1204) is fixedly connected to the inner bottom wall of the mounting groove (11). The slider (1204) is slidably connected inside the sliding groove (1202).

4. The dual-station display back shell injection mold according to claim 3, characterized in that, The lower surface of the moving template (5) has grooves (1205) on both the left and right sides. The inside of the grooves (1205) is fixedly connected to the mounting base (1206) by screws. The inside of the mounting base (1206) is fixedly connected to the inclined rod (1207). The bottom end of the inclined rod (1207) gradually tilts towards the outside of the moving template (5). The upper surface of the movable block (1201) has inclined holes (1208) corresponding to the inclined rod (1207).

5. The dual-station display back shell injection mold according to claim 4, characterized in that, The ejection assembly (10) includes a movable top plate (1001) slidably connected to the upper surface of the lower fixed plate (8). A plurality of demolding ejector pins (1002) are installed on the upper surface of the movable top plate (1001). The top of the demolding ejector pins (1002) extends into the interior of the fixed mold core (15). Connecting seats (1003) are fixedly connected to the left and right sides of the lower fixed plate (8) and the fixed mold plate (9).

6. The dual-station display back shell injection mold according to claim 5, characterized in that, The ejector pin (1002) includes an ejector pin (1004) and an angled ejector pin (1005). The top end of the angled ejector pin (1005) extends into the interior of the fixed mold core (15) and forms an undercut (1006). The bottom end of the angled ejector pin (1005) is slidably connected to the movable top plate (1001).

7. The dual-station display back shell injection mold according to claim 6, characterized in that, The lower surface of the moving template (5) is provided with guide holes (501) at all four corners, and the upper surface of the fixed template (9) is fixedly connected with guide posts (502) corresponding to the guide holes (501) at all four corners.

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