Display rear shell injection mold

Abstract

The utility model discloses a display rear shell injection mold, and aims to solve the problems that the appearance of a product is damaged and the overall performance and reliability of the product are reduced due to the fact that the conventional display rear shell is easy to damage in the demolding process. The mold comprises an upper mold body and a lower mold body, a displayer rear shell cavity is formed when the upper mold body and the lower mold body are closed, the upper mold body comprises an upper fixing plate, a runner plate and an upper mold plate, an injection molding opening is formed in the upper fixing plate, and six pouring inlets are formed in the runner plate. Materials are fed into the display rear shell cavity through the injection molding opening and the six pouring inlets, burrs of products are reduced, the auxiliary mold slides towards the outer side and is separated from the display rear shell cavity in the demolding process, meanwhile, an inverted buckle at the top end of the inclined ejector rod is separated from a buckle formed on a display rear shell, and the product quality is improved. Therefore, the display rear shell is quickly and effectively ejected out of the lower mold core through the ejection assembly, the appearance of a product is prevented from being damaged, and the overall performance and reliability of the product are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to display rear shell injection mould technical field, concretely relates to a display rear shell injection mould. BACKGROUND

[0002] In today's digital age, display as the key equipment of information transmission, is widely used in various fields, from personal computer, smart phone to large commercial display screen, its market demand continues to grow. Display rear shell as an important part of display, not only plays the role of protection internal electronic components, also has important influence to the appearance of display, heat dissipation performance and overall stability. Injection mould as the key tool of producing display rear shell, its design and manufacturing level directly determines the quality of rear shell, production efficiency and cost.

[0003] The left and right sides and the front and back sides of the existing display rear shell are provided with a plurality of mounting holes, as shown in Figure 1 As the shape of the mounting hole is relatively complex, it is troublesome to take out the display rear shell product, which is easy to cause damage to the display rear shell during demolding, such as cracking, deformation, buckle fracture and other defects. These defects not only damage the appearance of the product, but also may affect the protection and fixing effect of the display rear shell on the internal components of the display, thereby reducing the overall performance and reliability of the product. UTILITY MODEL CONTENTS

[0004] (1) Technical problem to be solved

[0005] In view of the defects of the prior art, the utility model aims at providing a display rear shell injection mould, which aims at solving the problem that the existing display rear shell is easy to be damaged during demolding, not only damaging the appearance of the product, but also reducing the overall performance and reliability of the product.

[0006] (2) Technical scheme

[0007] In order to solve the above technical problem, the utility model provides a display rear shell injection mould, which comprises an upper mould and a lower mould, the upper mould and the lower mould form a display rear shell cavity when they are closed, the upper mould comprises an upper fixed plate, a runner plate and an upper mould plate, the upper fixed plate is provided with an injection port, the runner plate is provided with six gating ports, the two ends of the gating port are communicated with the injection port and the display rear shell cavity respectively, the lower mould comprises a lower fixed plate and a lower mould plate, a ejection assembly is arranged between the lower fixed plate and the lower mould plate, the ejection assembly is used for ejecting the display rear shell formed in the display rear shell cavity, the left and right sides and the front and back sides of the upper surface of the lower mould plate are provided with mounting grooves, and an auxiliary mould is slid in the mounting groove.

[0008] Preferably, the upper die plate and the lower die plate are fixedly connected with upper die cores and lower die cores respectively on the side close to each other, and the upper die and the lower die form a display rear shell cavity through the upper die cores, the lower die cores and the auxiliary die after the upper die and the lower die are closed.

[0009] Further, the inner bottom wall of the mounting groove is fixedly connected with a sliding block, the outer side of the auxiliary die is fixedly connected with a movable block, the lower surface of the movable block is provided with a sliding groove, the sliding block is slidingly connected in the sliding groove, and the movable block and the lower die core are provided with a spring.

[0010] Still further, the upper surface of the movable block is provided with an inclined hole, the bottom end of the inclined hole is inclined to the outer side of the lower die plate, and the lower surface of the upper die plate is fixedly connected with an inclined rod corresponding to the inclined hole.

[0011] Still further, the upper surface of the lower die plate is fixedly connected with guide columns at four corners, and the lower surface of the upper die plate is provided with guide holes corresponding to the guide columns at four corners.

[0012] Still further, the ejection assembly comprises connecting plates fixedly connected to the front and rear sides of the lower fixed plate and the lower die plate, the upper surface of the lower fixed plate is slidingly connected with a movable plate, the upper surface of the movable plate is provided with a plurality of demolding ejector rods, and the top end of the demolding ejector rod extends to the inside of the lower die core.

[0013] Still further, the demolding ejector rod comprises a thimble and an inclined ejector rod, the bottom end of the inclined ejector rod is slidingly connected with the movable plate, and the top end of the inclined ejector rod extends to the inside of the lower die core and forms an undercut.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the utility model lie in that:

[0016] The utility model discloses through injection port and six pouring inlets send material into display rear shell cavity, reduce the burr of product, and drive movable block and auxiliary die to slide to the outside and separate from display rear shell cavity when demolding, and the undercut of the top end of the inclined ejector rod is separated from the buckle formed on the display rear shell, so that the display rear shell is quickly and effectively ejected from the lower die core through the ejection assembly, the appearance of the product is prevented from being damaged, and the overall performance and reliability of the product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the display rear shell structure schematic diagram of injection molding.

[0018] Figure 2 It is the three-dimensional structure schematic diagram of the utility model.

[0019] Figure 3 It is the pouring inlet structure schematic diagram of the utility model.

[0020] Figure 4This is a schematic diagram of the right-side cross-sectional structure of this utility model.

[0021] Figure 5 This is the utility model Figure 4 A magnified structural diagram of point A in the middle.

[0022] Figure 6 This is a schematic diagram of the internal installation structure of the mounting slot of this utility model.

[0023] Figure 7 This is the utility model Figure 6 Enlarged structural diagram at point B

[0024] Figure 8 This is a schematic diagram of the right-side cross-sectional structure of this utility model.

[0025] The markings in the attached diagram are as follows: 1. Upper mold; 2. Lower mold; 3. Display back shell cavity; 4. Upper fixing plate; 5. Runner plate; 6. Upper mold plate; 7. Injection gate; 8. Sprue; 9. Lower fixing plate; 10. Lower mold plate; 11. Ejector assembly; 12. Mounting slot; 13. Auxiliary mold; 14. Upper mold core; 15. Lower mold core; 1201. Slider; 1202. Movable block; 1203. Slide groove; 1204. Spring; 1205. Angled hole; 1206. Angled rod; 1001. Guide pillar; 1002. Guide hole; 1101. Connecting plate; 1102. Movable plate; 1103. Ejector pin; 1104. Ejector pin; 1105. Angled ejector pin; 1106. Undercut; 12. Display back shell. Detailed Implementation

[0026] This specific embodiment is an injection mold for producing a display back cover 12, as shown in the schematic diagram below. Figures 1-8 As shown, the mold includes an upper mold 1 and a lower mold 2. When the upper mold 1 and the lower mold 2 are closed, a display back shell cavity 3 is formed. The upper mold 1 includes an upper fixed plate 4, a runner plate 5 and an upper template 6. An injection port 7 is provided on the upper fixed plate 4. Six sprues 8 are provided on the runner plate 5. The two ends of the sprues 8 are respectively connected to the injection port 7 and the display back shell cavity 3. The lower mold 2 includes a lower fixed plate 9 and a lower template 10. An ejector assembly 11 is provided between the lower fixed plate 9 and the lower template 10. The ejector assembly 11 is used to eject the display back shell formed in the display back shell cavity 3. Mounting grooves 12 are provided on the left and right sides and the front and rear sides of the upper surface of the lower template 10. An auxiliary mold 13 slides inside the mounting grooves 12.

[0027] like Figure 2 and Figure 4As shown in the drawings: in this embodiment, the upper die core 14 and the lower die core 15 are fixedly connected to the side of the upper die plate 6 and the lower die plate 10 respectively, and the upper die 1 and the lower die 2 form the display rear shell cavity 3 through the upper die core 14, the lower die core 15 and the auxiliary die 13 after the upper die 1 and the lower die 2 are closed.

[0028] As shown in the drawings: Figure 4 and Figure 5 As shown in the drawings: in this embodiment, the inner bottom wall of the mounting groove 12 is fixedly connected with a sliding block 1201, the outer side of the auxiliary die 13 is fixedly connected with a movable block 1202, the lower surface of the movable block 1202 is provided with a sliding groove 1203, the sliding block 1201 is slidingly connected in the sliding groove 1203, and the spring 1204 is installed between the movable block 1202 and the lower die core 15; the two ends of the spring 1204 are fixedly connected, and the spring 1204 will be compressed when the upper die 1 and the lower die 2 are closed, and the spring 1204 can assist in pushing the movable block 1202 to slide outward along the sliding block 1201 when the upper die 1 and the lower die 2 are separated.

[0029] As shown in the drawings: Figure 5 , Figure 6 and Figure 7 As shown in the drawings: in this embodiment, the upper surface of the movable block 1202 is provided with an inclined hole 1205, the bottom end of the inclined hole 1205 gradually inclines to the outside of the lower die plate 10, and the lower surface of the upper die plate 6 is fixedly connected with an inclined rod 1206 corresponding to the inclined hole 1205; the upper die 1 and the lower die 2 are separated by the press, at this time the upper die plate 6 drives the inclined rod 1206 to move upward, and since the bottom end of the inclined rod 1206 gradually inclines to the outside of the lower die plate 10, the inclined rod 1206 can drive the movable block 1202 and the auxiliary die 13 to slide outward and separate from the display rear shell cavity 3 in the process of sliding in the inclined hole 1205, thereby facilitating the demolding of the display rear shell 12.

[0030] As shown in the drawings: Figure 2 and Figure 8 As shown in the drawings: in this embodiment, the upper surface of the lower die plate 10 is fixedly connected with guide columns 1001 at four corners, and the lower surface of the upper die plate 6 is provided with guide holes 1002 corresponding to the guide columns 1001 at four corners; the upper die plate 6 and the lower die plate 10 are separated by the press, at this time the guide columns 1001 can slide in the guide holes 1002, and when the upper die plate 6 and the lower die plate 10 are closed, the guide columns 1001 and the guide holes 1002 can cooperate to more accurately close the mold.

[0031] As shown in the drawings: Figure 2 and Figure 4As shown in the drawings: in this embodiment, the ejection assembly 11 includes a connecting plate 1101 fixedly connected to the front and rear sides of the lower fixed plate 9 and the lower mold plate 10, the upper surface of the lower fixed plate 9 is slidably connected with a movable plate 1102, a slide column is fixedly connected between the lower fixed plate 9 and the lower mold plate 10, the movable plate 1102 is slidably sleeved on the outer surface of the slide column, and the outer surface of the slide column is sleeved with a return spring, the upper surface of the movable plate 1102 is provided with a plurality of demolding ejector rods 1103, the top end of the demolding ejector rod 1103 extends into the inside of the lower mold core 15; in this way, by pushing the movable plate 1102 to drive the demolding ejector rod 1103 to move upward, the formed display back shell 12 is separated from the lower mold core 15.

[0032] As shown in the drawings: Figure 4 and Figure 5 As shown in the drawings: in this embodiment, the demolding ejector rod 1103 includes a thimble 1104 and an inclined ejector rod 1105, the bottom end of the inclined ejector rod 1105 is slidably connected with the movable plate 1102, a mounting seat is fixedly connected on the movable plate 1102, and a long hole is formed in the mounting seat, the bottom end of the inclined ejector rod 1105 is fixedly connected with a pin shaft and slidably connected in the inside of the long hole, and the top end of the inclined ejector rod 1105 extends into the inside of the lower mold core 15 and is formed with an undercut 1106; the undercut 1106 is a part of the display back shell cavity 3, and can form a buckle of the display back shell 12 during injection molding; during demolding, the inclined ejector rod 1105 is in an inclined state, and the bottom end can slide left and right relative to the movable plate 1102; at this time, after the inclined ejector rod 1105 moves upward, it can gradually move inward; finally, the undercut 1106 at the top end of the inclined ejector rod 1105 is separated from the buckle formed on the display back shell 12.

[0033] Working principle: during injection molding, the material enters the display back shell cavity 3 through the injection port 7 and along the six sprues 8 into the upper mold core 14, the lower mold core 15 and the auxiliary mold 13, until the raw material cools in the cavity to form a display back shell, and then the upper mold 1 and the lower mold 2 are separated by the press machine; at this time, the inclined rod 1206 is driven by the upper mold plate 6 to move upward; since the bottom end of the inclined rod 1206 gradually inclines outward of the lower mold plate 10, the inclined rod 1206 can drive the movable block 1202 and the auxiliary mold 13 to slide outward and separate from the display back shell cavity 3 during sliding in the inclined hole 1205; then the movable plate 1102 is pushed to drive the demolding ejector rod 1103 to move upward, so that the formed display back shell is separated from the lower mold core 15; at the same time, since the inclined ejector rod 1105 is in an inclined state, and the bottom end can slide left and right relative to the movable plate 1102, at this time, after the inclined ejector rod 1105 moves upward, it can gradually move inward; finally, the undercut 1106 at the top end of the inclined ejector rod 1105 is separated from the buckle formed on the display back shell, so that the display back shell is quickly and effectively ejected from the lower mold core 15, avoiding damage to the appearance of the product, and improving the overall performance and reliability of the product.

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

[0035] The above embodiment is a preferred implementation scheme of the utility model, in addition to this, the utility model can be realized in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A display backshell injection mould, the mould comprising an upper mould half (1) and a lower mould half (2), characterised in that: The upper die (1) and the lower die (2) form a display back shell cavity (3) when they are closed, the upper die (1) comprises an upper fixed plate (4), a runner plate (5) and an upper die plate (6), the upper fixed plate (4) is provided with an injection port (7), the runner plate (5) is provided with six pouring gates (8), the two ends of the pouring gate (8) are communicated with the injection port (7) and the display back shell cavity (3) respectively, the lower die (2) comprises a lower fixed plate (9) and a lower die plate (10), the lower fixed plate (9) and the lower die plate (10) are provided with an ejection assembly (11), the ejection assembly (11) is used for ejecting the display back shell formed in the display back shell cavity (3), the left and right sides and the front and rear sides of the upper surface of the lower die plate (10) are provided with mounting grooves (12), the inside of the mounting groove (12) is slidably provided with an auxiliary die (13).

2. The display back injection mold of claim 1, wherein, The upper die plate (6) and the lower die plate (10) are fixedly connected with an upper die core (14) and a lower die core (15) on the side close to each other, the upper die (1) and the lower die (2) form a display back shell cavity (3) through the upper die core (14), the lower die core (15) and the auxiliary die (13) after being closed.

3. The display back injection mold of claim 2, wherein, The inside bottom wall of the mounting groove (12) is fixedly connected with a sliding block (1201), the outside of the auxiliary die (13) is fixedly connected with a movable block (1202), the lower surface of the movable block (1202) is provided with a sliding groove (1203), the sliding block (1201) is slidably connected in the sliding groove (1203), the movable block (1202) and the lower die core (15) are provided with a spring (1204).

4. The display back injection mold of claim 3, wherein, The upper surface of the movable block (1202) is provided with an inclined hole (1205), the bottom end of the inclined hole (1205) gradually inclines to the outside of the lower die plate (10), the lower surface of the upper die plate (6) is fixedly connected with an inclined rod (1206) corresponding to the inclined hole (1205).

5. The display back case injection mold of claim 4, wherein, The upper surface of the lower die plate (10) is fixedly connected with a guide column (1001) at four corners, the lower surface of the upper die plate (6) is provided with a guide hole (1002) corresponding to the guide column (1001) at four corners.

6. The display back injection mold of claim 5, wherein, The ejection assembly (11) comprises a connecting plate (1101) fixedly connected to the front and rear sides of the lower fixed plate (9) and the lower die plate (10), the upper surface of the lower fixed plate (9) is slidably connected with a movable plate (1102), the upper surface of the movable plate (1102) is provided with a plurality of demolding ejector rods (1103), the top end of the demolding ejector rod (1103) extends to the inside of the lower die core (15).

7. The display back injection mold of claim 6, wherein, The demolding ejector rod (1103) comprises a thimble (1104) and an inclined ejector rod (1105), the bottom end of the inclined ejector rod (1105) is slidably connected with the movable plate (1102), the top end of the inclined ejector rod (1105) extends to the inside of the lower die core (15) and forms a reverse buckle (1106).

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