Injection mold for a notebook computer back cover

Abstract

The utility model discloses a kind of injection mould of notebook computer back cover, including base, the upper end surface of the base is fixedly installed with fixed mould, the upper of the fixed mould is provided with moving plate, the lower of the moving plate is fixedly installed with the fixed mould matched with movable mould, the fixed mould includes mould shell and female die, the mould shell is fixedly installed in the upper end surface of base, the female die is fixedly installed in mould shell, the female die side is provided with cooling pipe group, and the bottom surface of female die is embedded and fixed with several groups of stripping plate. The application is matched by cooling pipe group and cooling assembly, cooling liquid circulates in spiral pipe, can quickly take away the heat in female die, accelerate the cooling forming speed of injection molding part, greatly improve production efficiency. The setting of stripping plate and refrigeration fan forms air film between injection molding part and bottom plate, reduces friction, so that injection molding part can be smoothly stripped, reduce the probability of product damage, ensure product quality.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically to an injection mold for a laptop computer back cover. Background Technology

[0002] In the consumer electronics industry, the laptop back cover is a crucial structural and aesthetic component, and its production quality and efficiency directly impact the assembly precision and market competitiveness of the entire device. Injection molding, with its advantages of high speed, high precision, and mass production capability, has become one of the core technologies in laptop back cover manufacturing. A typical injection mold mainly includes key components such as a fixed mold, a moving mold, a cooling system, and a demolding mechanism. The efficiency of the cooling system determines the molding cycle of the injection molded part, while the reliability of the demolding mechanism directly affects the product yield.

[0003] Traditional laptop back cover injection molds typically employ a straight cooling water pipe design for their cooling systems. This design limits the contact area between the water pipes and the mold cavity, and results in a single coolant flow path. Furthermore, traditional ejection mechanisms often rely on mechanical ejector pins, which have a small contact area with the molded part, making them prone to localized stress concentration during ejection. For example, thin-walled areas of the laptop back cover often experience whitening and breakage under the action of mechanical ejector pins.

[0004] Moreover, the cooling system and demolding mechanism of traditional molds are independent of each other. The cooling system only works during the injection stage, while the mold temperature is still high during demolding, resulting in insufficient rigidity of the injection molded parts, which are prone to deformation during ejection. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold for a laptop computer back cover, which aims to improve the problems of low cooling efficiency and poor demolding reliability of existing injection molds.

[0006] This utility model is implemented as follows: An injection mold for a laptop computer back cover includes a base. A fixed mold is fixedly installed on the upper surface of the base. A movable plate is provided above the fixed mold. A movable mold that cooperates with the fixed mold is fixedly installed below the movable plate. The fixed mold includes a mold shell and a cavity mold. The mold shell is fixedly installed on the upper surface of the base. The cavity mold is fixedly installed in the mold shell. A cooling pipe assembly is provided on the side of the cavity mold. Several sets of ejector plates are embedded and fixed on the bottom surface of the cavity mold. A cooling component that supplies circulating coolant to the cooling pipe assembly is installed in the base. A cooling fan connected to the ejector plates is also provided in the base.

[0007] Preferably, the upper end face of the mold shell is provided with a positioning groove for mounting the die, and the four corners of the mold shell are also provided with connecting grooves for connecting to the base.

[0008] Preferably, the die includes a base plate, a forming frame, and a top frame. The forming frame is installed on the upper surface of the base plate, and the top frame is installed on the upper surface of the forming frame. The base plate, the forming frame, and the top frame are integrally formed.

[0009] Preferably, the cooling tube assembly includes a spiral tube, an inlet pipe head, and an outlet pipe head. The spiral tube is fitted and fixed to the outer side of the molding frame, and the inlet pipe head and the outlet pipe head are vertically connected to both ends of the spiral tube.

[0010] Preferably, the cooling assembly includes a cooling tank, a circulating pump, and a return pipe. The circulating pump is fixedly installed in the cooling tank, and the outlet of the circulating pump is provided with a water supply bend connected to the inlet pipe. One end of the return pipe is connected to the outlet pipe, and the other end of the return pipe extends into the cooling tank.

[0011] Preferably, the template includes a strip-shaped shell and a connecting air pipe. The strip-shaped shell is embedded and fixed in the base plate, and a plurality of airtight slits are evenly provided on the upper surface of the strip-shaped shell. The connecting air pipe is sealed and connected to one end of the strip-shaped shell.

[0012] Preferably, the air outlet of the refrigeration fan is connected to a distribution pipe shell, and the upper end face of the distribution pipe shell is provided with a plurality of air supply pipe heads that are sealed and connected to the connecting air pipes. The air supply pipe heads are integrally formed with the distribution pipe shell.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: This application, through the cooperation of cooling pipe groups and cooling components, allows the coolant to circulate in the spiral tube, quickly removing heat from the cavity mold and accelerating the cooling and molding speed of the injection molded parts, thus greatly improving production efficiency. The setting of the ejector plate and cooling fan forms an air film between the injection molded parts and the base plate, reducing friction and enabling smooth demolding of the injection molded parts, reducing the probability of product damage, and ensuring product quality. Furthermore, the simultaneous air supply to each ejector plate ensures that uneven force during demolding avoids damage to the molded products. The design of the cooling components and the distribution pipe shell allows the coolant and cold air to act evenly on all parts of the mold, ensuring uniform cooling of the injection molded parts and further improving product quality. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure in an embodiment of this utility model; Figure 2 yes Figure 1 The device shown is a side view without the movable plate and moving mold installed; Figure 3 This is an exploded structural diagram of the fixed mold, cooling tube assembly and demolding template in an embodiment of the present invention; Figure 4This is an exploded structural diagram of the cavity mold, release mold, diversion pipe shell and air supply pipe head in an embodiment of this utility model; Figure 5 yes Figure 4 Front view of the device shown.

[0015] In the diagram: 1. Base; 2. Fixed mold; 20. Moving plate; 201. Moving mold; 21. Mold shell; 211. Positioning groove; 212. Connecting groove; 22. Concave mold; 221. Base plate; 222. Forming frame; 223. Top frame; 3. Cooling pipe assembly; 31. Spiral pipe; 32. Water inlet pipe head; 33. Water outlet pipe head; 4. Demolding plate; 41. Strip shell; 411. Airtight seam; 42. Connecting air pipe; 5. Cooling assembly; 51. Cooling box; 52. Circulating pump; 521. Water supply bend; 53. Return pipe; 6. Refrigeration fan; 61. Diverter shell; 62. Air supply pipe head. Detailed Implementation

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Reference Figure 1 , Figure 2 and Figure 3As shown, an injection mold for a laptop back cover includes a base 1. A fixed mold 2 is fixedly mounted on the upper surface of the base 1. A movable plate 20 is disposed above the fixed mold 2. A movable mold 201, which cooperates with the fixed mold 2, is fixedly mounted below the movable plate 20. The fixed mold 2 includes a mold shell 21 and a cavity mold 22. The mold shell 21 is fixedly mounted on the upper surface of the base 1, and the cavity mold 22 is fixedly mounted in the mold shell 21. Cooling pipe assembly 3 is disposed on the side of the cavity mold 22, and several sets of ejector plates 4 are embedded and fixedly fixed on the bottom surface of the cavity mold 22. A cooling assembly 5 for supplying circulating coolant to the cooling pipe assembly 3 is installed in the base 1, and a cooling fan 6 connected to the ejector plates 4 is also disposed in the base 1. The base 1 ensures that the fixed mold 2 can be stably installed and used, while the movable plate 20 and the movable mold 201 ensure that they cooperate with the fixed mold 2 for molding operations. At the same time, the movable mold 201 is also provided with a corresponding sprue, which enables the injection molding of the laptop back cover. The cooling pipe assembly 3 and cooling component 5 effectively cool the cavity mold 22, accelerating the molding speed of the injection molded parts and improving production efficiency. The demolding platen 4 and cooling fan 6 facilitate smooth demolding after molding, reducing the possibility of product damage and ensuring product quality, while also providing some cooling effect on the molded product. By designing the fixed mold 2 as a structure where the mold shell 21 and cavity mold 22 cooperate, it is easier to better arrange the cooling pipe assembly 3 and cooling component 5, and also facilitates later maintenance operations. The cooling fan 6 can be a DF-100 model, which has good cooling effect and moderate airflow, providing sufficient cold air to the demolding platen 4.

[0018] Reference Figure 1 , Figure 2 and Figure 3 As shown, the upper surface of the mold shell 21 has a positioning groove 211 for mounting the die 22, and the four corners of the mold shell 21 also have connecting grooves 212 for connecting to the base 1. The positioning groove 211 on the mold shell 21 facilitates the accurate installation of the die 22, ensuring the positional accuracy of the die 22 in the mold shell 21, thereby ensuring the accuracy of injection molding. The connecting grooves 212 allow the mold shell 21 to be stably connected to the base 1, enhancing the overall stability of the mold and preventing the product quality from being affected by the shaking of the mold shell 21 during injection molding. The die 22 includes a base plate 221, a forming frame 222, and a top frame 223. The forming frame 222 is mounted on the upper surface of the base plate 221, and the top frame 223 is mounted on the upper surface of the forming frame 222. The base plate 221, the forming frame 222, and the top frame 223 are integrally formed. The die 22 adopts an integral structure of base plate 221, forming frame 222, and top frame 223, ensuring the overall strength and stability of the die 22. The integral molding design reduces assembly errors, making the dimensions of the injection molded products more accurate, and also improving the service life of the mold.

[0019] Reference Figure 4 and Figure 5 As shown, the cooling pipe assembly 3 includes a spiral tube 31, an inlet pipe 32, and an outlet pipe 33. The spiral tube 31 is fixedly attached to the outer surface of the molding frame 222, and the inlet pipe 32 and outlet pipe 33 are vertically connected to both ends of the spiral tube 31. The spiral tube 31 of the cooling pipe assembly 3 is attached to the outer surface of the molding frame 222, increasing the contact area between the coolant and the molding frame 222, enabling more efficient heat removal from the molding frame 222 and improving cooling efficiency. The vertical connection of the inlet pipe 32 and outlet pipe 33 facilitates connection to the cooling component 5 and ensures smooth coolant circulation. The spiral tube 31 can be made of copper, which has good thermal conductivity and can efficiently transfer heat, improving cooling efficiency.

[0020] Reference Figure 2 As shown, the cooling assembly 5 includes a cooling tank 51, a circulating pump 52, and a return pipe 53. The circulating pump 52 is fixedly installed in the cooling tank 51, and its outlet is equipped with a water supply bend 521 connected to the inlet pipe 32. One end of the return pipe 53 is connected to the outlet pipe 33, and the other end extends into the cooling tank 51. The circulating pump 52 in the cooling assembly 5 can transport the coolant in the cooling tank 51 to the cooling pipe assembly 3, realizing the circulation of the coolant. The return pipe 53 returns the used coolant to the cooling tank 51, forming a complete cooling circulation system. This design ensures a continuous supply of coolant and effective cooling, improving the cooling effect and stability of the mold. The circulating pump 52 can be a Grundfos circulating pump 52 of model CHL2-40, which has the advantages of stable flow rate, suitable head, and low noise, and can meet the needs of coolant circulation.

[0021] Reference Figure 3 and Figure 4 As shown, the demolding mold 4 includes a strip-shaped shell 41 and a connecting air pipe 42. The strip-shaped shell 41 is embedded and fixed in the base plate 221, and a plurality of airtight slits 411 are evenly provided on the upper end surface of the strip-shaped shell 41. The connecting air pipe 42 is sealed and connected to one end of the strip-shaped shell 41. The strip-shaped shell 41 of the demolding mold 4 is embedded in the base plate 221, and the upper end surface is provided with airtight slits 411. When the cooling fan 6 introduces cold air into the strip-shaped shell 41, the cold air will be blown out from the airtight slits 411, forming an air film between the injection molded part and the base plate 221, reducing the friction between the injection molded part and the base plate 221, facilitating the demolding of the injection molded part. At the same time, the cold air blown out by the cooling fan 6 can further cool the injection molded part.

[0022] Reference Figure 4 and Figure 5As shown, the outlet of the cooling fan 6 is connected to a distribution pipe shell 61. Several air supply pipe heads 62, which are sealed to the connecting air pipes 42, are provided on the upper surface of the distribution pipe shell 61. The air supply pipe heads 62 are integrally formed with the distribution pipe shell 61. The connection between the outlet of the cooling fan 6 and the distribution pipe shell 61, and the air supply pipe heads 62 on the distribution pipe shell 61, and the sealed connection between the air supply pipe heads 62 and the connecting air pipes 42 of the demolding mold 4, allows the cold air generated by the cooling fan 6 to be evenly distributed to each demolding mold 4, ensuring that each demolding mold 4 can perform a good demolding and cooling function, improving the demolding effect and consistency. Simultaneously supplying air to each demolding mold 4 ensures that uneven stress during demolding avoids damage to the molded product.

[0023] Working Principle: During actual injection molding, the circulating pump 52 of the cooling assembly 5 is activated, causing the coolant to circulate in the cooling tank 51, cooling pipe assembly 3, and return pipe 53, cooling the cavity mold 22. The injection molding material is injected into the cavity formed by the fixed mold 2 and the moving mold 201. During injection molding, the coolant continuously cools the cavity mold 22, accelerating the molding speed of the injection molded part. After the injection molded part is formed, the cooling fan 6 is activated, and cold air enters the strip shell 41 of the demolding plate 4 through the distributor shell 61 and connecting air pipe 42, blowing out from the airtight seam 411, forming an air film between the injection molded part and the base plate 221, facilitating demolding. The moving plate 20 is moved by an external hydraulic cylinder (not shown in the figure), separating the moving mold 201 from the fixed mold 2, and the injection-molded laptop back cover is removed.

[0024] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection mold for a laptop computer back cover, comprising a base (1), characterized in that, A fixed mold (2) is fixedly installed on the upper surface of the base (1). A movable plate (20) is provided above the fixed mold (2). A movable mold (201) that cooperates with the fixed mold (2) is fixedly installed below the movable plate (20). The fixed mold (2) includes a mold shell (21) and a concave mold (22). The mold shell (21) is fixedly installed on the upper surface of the base (1). The concave mold (22) is fixedly installed in the mold shell (21). A cooling pipe assembly (3) is provided on the side of the concave mold (22). Several sets of ejector plates (4) are embedded and fixed on the bottom surface of the concave mold (22). A cooling assembly (5) that supplies circulating coolant to the cooling pipe assembly (3) is installed in the base (1). A refrigeration fan (6) connected to the ejector plate (4) is also provided in the base (1).

2. The injection mold for a laptop computer back cover according to claim 1, characterized in that, The upper surface of the mold shell (21) is provided with a positioning groove (211) for mounting the die (22), and the four corners of the mold shell (21) are also provided with connecting grooves (212) for connecting to the base (1).

3. The injection mold for a laptop computer back cover according to claim 2, characterized in that, The die (22) includes a base plate (221), a forming frame (222) and a top frame (223). The forming frame (222) is installed on the upper surface of the base plate (221), and the top frame (223) is installed on the upper surface of the forming frame (222). The base plate (221), the forming frame (222) and the top frame (223) are integrally formed.

4. The injection mold for a laptop computer back cover according to claim 3, characterized in that, The cooling tube assembly (3) includes a spiral tube (31), an inlet pipe head (32), and an outlet pipe head (33). The spiral tube (31) is attached and fixed to the outer side of the molding frame (222). The inlet pipe head (32) and the outlet pipe head (33) are vertically connected to the two ends of the spiral tube (31).

5. The injection mold for a laptop computer back cover according to claim 4, characterized in that, The cooling assembly (5) includes a cooling tank (51), a circulating pump (52) and a return pipe (53). The circulating pump (52) is fixedly installed in the cooling tank (51), and the outlet of the circulating pump (52) is provided with a water supply bend (521) connected to the inlet pipe head (32). One end of the return pipe (53) is connected to the outlet pipe head (33), and the other end of the return pipe (53) extends into the cooling tank (51).

6. The injection mold for a laptop computer back cover according to claim 5, characterized in that, The template (4) includes a strip shell (41) and a connecting air pipe (42). The strip shell (41) is embedded and fixed in the base plate (221), and a number of airtight seams (411) are evenly provided on the upper surface of the strip shell (41). The connecting air pipe (42) is sealed and connected to one end of the strip shell (41).

7. The injection mold for a laptop computer back cover according to claim 6, characterized in that, The outlet of the refrigeration fan (6) is connected to a diversion pipe shell (61). The upper end face of the diversion pipe shell (61) is provided with a plurality of air supply pipe heads (62) that are sealed and connected to the connecting air pipe (42). The air supply pipe heads (62) are integrally formed with the diversion pipe shell (61).

Images