An injection mold for an ultra-narrow frame shell structure

Abstract

The utility model discloses an injection mold for super narrow frame shell structure spare, including movable mould body (1), fixed mould body (2) and pusher (3), the bottom surface of movable mould body (1) is equipped with mould groove (4), the top surface of fixed mould body (2) is equipped with moulding sand (5), and moulding sand (5) and mould groove (4) cooperate and form shell cavity, be equipped with glue injection runner (6) in movable mould body (1), the top surface of fixed mould body (2) is equipped with with glue injection runner (6) corresponding and with shell cavity links's glue injection runner (7), be equipped with push rod spare (8) in fixed mould body (2) of pusher (3) on, movable mould body (1) side part is equipped with liquid inlet (9) and liquid outlet (10), the utility model discloses the cooling speed of the side wall and back of thin -walled structural member is distributed reasonably, and effectively ensures the size accuracy and strength reliability of structure.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an injection mold for an ultra-narrow bezel shell structure. Background Technology

[0002] Injection molds form a mold cavity through the cooperation of a fixed mold and a moving mold. Molten plastic is then injected into the mold cavity to form the molded part. Finally, the molded structural part is ejected by an ejector pin. However, for ultra-narrow bezel shell structural parts, the requirements for dimensional accuracy and uniformity of the thin-walled part are high. Compared with the thicker shell wall, the cooling rates of the two are different. Existing injection molds use planar cooling units for cooling. The internal coolant flows from one end to the other through cooling channels to remove heat and achieve cooling. The coolant absorbs heat and rises in temperature, resulting in a large difference in cooling rates between the two sides of the structural part. Furthermore, for thin-walled structural parts, when the thin wall is cooled but the back is not cooled and cannot be demolded in time, it may shrink along with the back, causing the dimensions to exceed the tolerance range. At the same time, internal stress will be generated inside, affecting the overall strength of the structure. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold for ultra-narrow bezel housing structures. This invention rationally distributes the cooling rates of the sidewalls and back of the thin-walled structure, effectively ensuring the dimensional accuracy and structural reliability of the structure.

[0004] The technical solution of this utility model is as follows: An injection mold for an ultra-narrow bezel shell structure includes a moving mold body, a fixed mold body, and an ejector. The bottom surface of the moving mold body is provided with a mold groove, and the top surface of the fixed mold body is provided with a mold core. The mold core and the mold groove cooperate to form a shell cavity. The moving mold body is provided with an injection channel, and the top surface of the fixed mold body is provided with an inlet channel corresponding to the injection channel and connected to the shell cavity. The ejector is provided with a push rod located inside the fixed mold body. The side of the moving mold body is provided with an inlet and an outlet. The moving mold body corresponding to the mold groove is provided with a cooling channel corresponding to the shell cavity and connecting the inlet and outlet. The cooling channel includes a spiral portion connected to the inlet and distributed from the inside to the outside. The spiral portion corresponds to the middle part of the mold groove. The end of the spiral portion is provided with a middle guide portion extending towards the side of the mold groove. The end of the middle guide portion is provided with a frame-shaped portion, which corresponds to the side of the mold groove.

[0005] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the push rod component includes multiple main push rods located in the middle of the mold core and multiple side push rods located on the side edges of the mold core.

[0006] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the end of the main push rod has a main support surface that fits with the back of the mold core.

[0007] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the end of the side push rod has a side support surface that fits with the back of the mold core and a solid surface that fits with the side surface of the mold core.

[0008] In the aforementioned injection mold for an ultra-narrow bezel shell structure, the side support surface and the solid surface have a rounded transition.

[0009] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the number of side push rods on one side of the mold core is at least two.

[0010] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the push rod component further includes an auxiliary push rod disposed within the glue inlet channel.

[0011] In the aforementioned injection mold for an ultra-narrow bezel housing structure, the middle guide portion is inclined.

[0012] In the aforementioned injection mold for an ultra-narrow bezel shell structure, the bends in the cooling channels all have rounded corner transitions.

[0013] In the aforementioned injection mold for an ultra-narrow bezel shell structure, the gate of the glue inlet channel is a horn gate.

[0014] Compared with the prior art, the mold grooves and cores of the moving mold body and the fixed mold body of this utility model cooperate to form a shell cavity. Molten plastic is injected into the shell cavity through the injection channel and the inlet channel. After the molten plastic fully fills the shell cavity, coolant is injected into the cooling channel through the liquid inlet. The coolant first enters the spiral part. The dense distribution of the spiral part and the coolant inside which has not absorbed heat and has a low temperature rapidly cool the back of the structural component. After absorbing heat, the coolant reaches the frame part through the middle guide part. The frame part surrounds the side wall of the structural component. The sparse distribution of the frame part and the coolant inside which has absorbed heat and has a high temperature slowly cool the side wall of the structural component. This effectively balances the cooling time of the back and the side wall, making it suitable for thin-walled structural components. It allows the thin wall and the back to be cooled more synchronously, thereby avoiding dimensional deviations and the generation of internal stress. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the moving mold of this utility model;

[0017] Figure 3 This is a schematic diagram of the cooling channel structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the mold core part of this utility model.

[0019] The labels in the attached diagram are as follows: 1. Moving mold body; 2. Fixed mold body; 3. Ejector; 4. Mold groove; 5. Mold core; 6. Injection channel; 7. Inlet channel; 8. Ejector rod; 9. Liquid inlet; 10. Liquid outlet; 11. Cooling channel; 12. Spiral section; 13. Intermediate guide section; 14. Frame-shaped section; 15. Main ejector rod; 16. Side ejector rod; 17. Side support surface; 18. Solid surface; 19. Auxiliary ejector rod; 20. Main support surface. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] Example: An injection mold for an ultra-narrow bezel housing structure, as shown in the attached figure. Figure 1As shown, the mold includes a moving mold body 1, a fixed mold body 2, and an ejector 3. The bottom surface of the moving mold body 1 is machined with a mold groove 4, and the top surface of the fixed mold body 2 is machined with a mold core 5. The mold core 5 and the mold groove 4 cooperate to form a shell cavity for molding a thin-walled shell. In a preferred embodiment, the edge of the mold groove is machined with a sealing groove 3mm wide and 1mm deep, into which a fluororubber sealing ring resistant to temperatures above 200℃ is embedded. During mold closing, the bottom surface of the moving mold body and the top surface of the fixed mold body are precisely positioned by mold guide pillars, and the sealing ring is squeezed and fitted, effectively preventing molten plastic from overflowing from the parting surface and ensuring the cavity's sealing performance. The mold core and the mold groove have a clearance fit of 0.02mm. The outer peripheral side of the mold core and the inner peripheral side of the mold groove are ground to ensure perpendicularity. The top surface of the mold core and the mold groove... The bottom surfaces remain parallel; the moving mold body 1 is equipped with an injection channel 6, and the top surface of the fixed mold body 2 has an injection channel 7 corresponding to the injection channel 6 and connected to the cavity of the shell; the ejector 3 is equipped with an ejector 8 that is movably connected to the fixed mold body 2. The fixed mold body is installed on the fixed template (not shown in the figure) of the injection molding machine, serving as the fixed part of the mold and providing an installation base for other parts of the mold. The moving mold body is installed on the moving template (not shown in the figure) of the injection molding machine and is driven to open and close the mold cavity. The ejector connects to the driving component to realize the ejection of the structural component. These are all technical means well known and mastered by those skilled in the art, and will not be described in detail here; the side of the moving mold body 1 is equipped with a liquid inlet 9 and a liquid outlet 10, and the mold groove 4 corresponds to the moving mold body 1. The interior is equipped with a cooling channel 11 that corresponds to the cavity of the shell and connects the inlet 9 and the outlet 10. The cooling channel 11 includes a spiral portion 12 connected to the inlet 9 and distributed from the inside to the outside. The spiral portion 12 corresponds to the middle part of the mold groove 4. The end of the spiral portion 12 is integrally formed with a middle guide portion 13 extending towards the side of the mold groove 4. The end of the middle guide portion 13 is integrally formed with a frame-shaped portion 14, which corresponds to the side of the mold groove 4. The middle guide portion is used to separate the spiral portion and the frame-shaped portion and change their distribution position. The push rod component 8 includes two main push rods 15 assembled at the middle position of the mold core 5 and eight side push rods 16 assembled at the side edges of the mold core 5. The main push rods are arranged on both sides of the middle part of the mold core, and two side push rods are evenly arranged on each side of the mold core. The width of the main push rod 15 is greater than that of the side push rod 16. The end of the main push rod 15 has a main support surface 20 that fits with the back of the mold core 5, which is used to provide main support for the back of the structural component. The end of the side push rod 16 has a side support surface 17 that fits with the back of the mold core 5 and a fixed surface 18 that fits with the side surface of the mold core 5. The side support surface provides lateral support to the edge of the back of the structural component, balancing the force on the structural component while preventing certain deformation. The fixed surface fits against the side wall of the structural component from the inside to limit its movement and prevent deformation during the ejection process. The side support surface 17 and the fixed surface 18 have a rounded transition. The push rod component 8 also includes an auxiliary push rod 19 assembled in the glue inlet channel 7, which together carries out the sprue material to prevent it from dragging the structural component and causing deformation.The intermediate guide portion 13 is inclined, and the intermediate guide portion is inclined along the contour of the mold groove side. The inclination angle is consistent with the inclination degree of the mold groove side, which is 60° in this embodiment. After the coolant flows out from the spiral portion, it can smoothly flow into the frame portion along the natural direction of the mold groove side, avoiding turbulence or stagnation caused by sudden angle changes, and ensuring the cooling uniformity of each section of the frame. The bends of the cooling channel 11 all have rounded corner transitions, which improves the smoothness of the coolant flow. The gate of the glue inlet channel 6 is a horn gate, and the gate outlet is located on the inner side wall of the shell cavity and close to the cavity. At the midpoint of the short side of the core region, this location allows the molten plastic to diffuse and fill the thin-walled area evenly from the center, reducing flow resistance and weld lines caused by uneven filling speed. It also avoids leaving gate marks on the surface. As a preferred embodiment, the horn-shaped gate has an inlet diameter of 2.0 mm and an outlet diameter of 1.5 mm, with a gradually tapering structure, a total length of 10 mm, and a radius of curvature of 8 mm. This concentrated force at the gate allows for smooth separation of the structural components from the remaining material in the injection channel, and the smooth gate surface improves yield.

[0022] Working principle: When the mold is working, the injection molding machine first drives the moving mold body 1 and the fixed mold body 2 to close the mold. The mold groove 4 and the mold core 5 are precisely connected to form a closed cavity. The injection channel 6 of the moving mold body 1 is aligned with the injection channel 7 of the fixed mold body 2. The molten plastic is injected into the cavity through the horn gate until it is completely filled.

[0023] During the cooling stage, the coolant enters the cooling channel 11 from the inlet 9: it first flows through the spiral part 12 corresponding to the middle of the mold groove 4. Its dense spiral distribution, combined with the low temperature coolant, quickly cools the back of the structural component. After absorbing heat, the coolant flows through the inclined middle guide part 13 to the frame part 14. The frame part 14 surrounds the side of the mold groove 4. With the sparse distribution and the heated coolant, it slowly cools the ultra-narrow frame thin wall, balances the cooling rate of different parts, and reduces internal stress and dimensional deviation.

[0024] After cooling and solidification, the moving mold body 1 and the fixed mold body 2 open, and the ejector 3 drives the ejector pins 8 to move: the main ejector pin 15 pushes the center of the back of the structural component through the main support surface 20; at least two side ejector pins 16 on each side support the back edge with the side support surface 17, and the solid surface 18 fits against the side wall to prevent deformation, with rounded corners between them to avoid stress concentration; the auxiliary ejector pin 19 simultaneously ejects the material head inside the sprue channel 7. The multiple ejector pins work together to smoothly eject the structural component from the mold core 5, completing the demolding and ensuring the dimensional accuracy and strength of the ultra-narrow frame structure.

[0025] The above embodiments merely illustrate the implementation of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. Furthermore, in these embodiments, "up," "down," "left," "right," "front," and "back" represent relative positions only, not absolute positions. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An injection mold for an ultra-narrow bezel shell structure, comprising a moving mold body (1), a fixed mold body (2), and an ejector (3), wherein the bottom surface of the moving mold body (1) is provided with a mold groove (4), and the top surface of the fixed mold body (2) is provided with a mold core (5), the mold core (5) and the mold groove (4) cooperate to form a shell cavity; the moving mold body (1) is provided with a glue injection channel (6), and the top surface of the fixed mold body (2) is provided with a glue inlet channel (7) corresponding to the glue injection channel (6) and connected to the shell cavity; the ejector (3) is provided with a push rod (8) located in the fixed mold body (2), characterized in that: The moving mold body (1) is provided with an inlet (9) and an outlet (10) on its side. The moving mold body (1) corresponding to the mold groove (4) is provided with a cooling channel (11) that corresponds to the shell cavity and connects the inlet (9) and the outlet (10). The cooling channel (11) includes a spiral part (12) that is connected to the inlet (9) and distributed from the inside to the outside. The spiral part (12) corresponds to the middle part of the mold groove (4). The end of the spiral part (12) is provided with a middle guide part (13) that extends to the side of the mold groove (4). The end of the middle guide part (13) is provided with a frame-shaped part (14). The frame-shaped part (14) corresponds to the side of the mold groove (4).

2. The injection mold for the ultra-narrow bezel housing structure according to claim 1, characterized in that: The push rod component (8) includes multiple main push rods (15) located in the middle of the mold core (5) and multiple side push rods (16) located on the side edges of the mold core (5).

3. The injection mold for the ultra-narrow bezel housing structure according to claim 2, characterized in that: The end of the main push rod (15) has a main support surface (20) that fits with the back of the mold core (5).

4. The injection mold for the ultra-narrow bezel housing structure according to claim 2, characterized in that: The end of the side push rod (16) has a side support surface (17) that fits with the back of the mold core (5) and a solid surface (18) that fits with the side surface of the mold core (5).

5. The injection mold for the ultra-narrow bezel housing structure according to claim 4, characterized in that: The side support surface (17) and the solid surface (18) have a rounded transition.

6. The injection mold for the ultra-narrow bezel housing structure according to claim 2, characterized in that: The mold core (5) shown has at least two side push rods (16) on one side.

7. The injection mold for the ultra-narrow bezel housing structure according to claim 2, characterized in that: The push rod component (8) also includes an auxiliary push rod (19) disposed in the glue inlet channel (7).

8. The injection mold for the ultra-narrow bezel housing structure according to claim 1, characterized in that: The intermediate guide section (13) is inclined.

9. The injection mold for the ultra-narrow bezel housing structure according to claim 1, characterized in that: The bends of the cooling channel (11) all have rounded corners.

10. The injection mold for the ultra-narrow bezel housing structure according to claim 1, characterized in that: The gating gate of the glue inlet channel (7) is a horn gating gate.

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