A printer housing manufacturing mold

Abstract

This application relates to the technical field of injection molds, specifically to a printer housing manufacturing mold, including a lower mold base and an upper mold base. The lower mold base has a lower mold cavity, in which a housing fixed punch is installed. A forming cavity is obliquely and through-cut on one side of the housing fixed punch. A round shell fixed punch is installed on one side of the forming cavity. The upper mold base has an upper mold cavity corresponding to the lower mold cavity, in which a forming fixed concave die is provided. The concave die is used to cooperate with the round shell fixed punch to form the round shell of the target semi-dome printer housing. A connecting cavity that cooperates with the forming cavity is obliquely cut on one side of the forming fixed concave die. A driving device is obliquely installed on the side of the lower mold base away from the round shell fixed punch. The output end of the driving device faces the forming cavity. A forming movable punch is installed on the output end of the driving device. By actively withdrawing the forming movable punch, the technical problem of the difficulty in demolding the semi-dome printer housing in the prior art is solved.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and in particular to a mold for manufacturing printer housings. Background Technology

[0002] The printer casing is the external structure of a printer, usually made of plastic or metal. It protects internal precision components (such as printheads, circuit boards, gear sets, etc.) from external environmental interference, while providing a user interface and heat dissipation. Plastic printer casings are mainly produced using injection molding. Engineers design and manufacture injection molds based on the shape of the printer casing. The designed injection molds are then installed on an injection molding machine, which injects molten plastic into the mold cavity, filling it to form the printer casing. After cooling the injection mold, the mold is opened and the printer casing is removed. This is the production process of the printer casing.

[0003] A printer housing exists, specifically a quarter-circular shell with an opening at the bottom, a sloping arc-shaped opening on one side, and a circular shell with a groove fixed at the top. This is referred to as a semi-domed printer housing. The circular shell is used to secure the print head or scanner lens, while the arc-shaped opening facilitates user operation, such as placing or removing printing material, reducing the inconvenience of bending over or adjusting angles. However, during the production of the semi-domed printer housing, because the arc-shaped opening is sloping, it is difficult to demold using a side-pulling method. Therefore, mold jamming occurs during the production of the semi-domed printer housing, limiting current technology to manufacturing semi-domed printer housings only through 3D printing. However, the production efficiency of semi-domed printer shells manufactured by 3D printers is very low because 3D printers form the semi-domed printer shell by depositing thermoplastic material layer by layer; while injection molds only need to inject the molten plastic into the mold cavity, and the molten plastic fills the mold cavity to form the injection molded part of the semi-domed printer shell. However, it is difficult to demold the semi-domed printer shell using injection molds. Therefore, this application proposes a printer shell manufacturing mold. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a printer housing manufacturing mold that solves the technical problem mentioned in the background art of the difficulty in demolding semi-dome printer housings using injection molds.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: a printer housing manufacturing mold, comprising a lower mold base and an upper mold base, wherein the lower mold base has a lower mold cavity, a housing fixed punch is installed in the lower mold cavity, a forming cavity is formed through one side of the housing fixed punch, a circular shell fixed punch is installed on one side of the forming cavity, the upper mold base has an upper mold cavity corresponding to the lower mold cavity, a forming fixed concave mold is provided in the upper mold cavity, the forming fixed concave mold is used to cooperate with the circular shell fixed punch to form the mold cavity of the target semi-dot type printer housing, and a connecting cavity is inclinedly formed on one side of the forming fixed concave mold to cooperate with the forming cavity, the forming cavity and the connecting cavity being used to cooperate with the housing fixed punch. A punch is a die used to form the cavity of a target semi-domed printer housing. A drive device is installed at an angle on the lower die base away from the fixed punch of the circular shell. The output end of the drive device faces the forming cavity. A moving punch is installed on the output end of the drive device. The lower die base and the upper die base both have mounting spaces for accommodating the drive device on the side near the drive device. The moving punch is used to extend into the die formed by the forming cavity and the connecting cavity combined with the fixed punch of the housing to form the final cavity of the semi-domed printer housing. The side of the die formed by the forming cavity and the connecting cavity combined with the fixed punch of the housing near the drive device has a notch for the moving punch to enter.

[0006] Furthermore, the forming moving punch includes a rectangular portion and an arc-shaped protrusion. The rectangular portion is used to form the shell of the semi-domed printer housing. The arc-shaped protrusion is integrally formed with the rectangular portion and is used to form the arc-shaped opening of the semi-domed printer housing. The bottom surface of the forming cavity near the circular shell fixed punch is provided with an arc-shaped forming groove for matching the arc-shaped protrusion to form the arc-shaped opening of the semi-domed printer housing.

[0007] Furthermore, the driving device includes a mounting base, an inclined surface, an inclined groove, a driving cylinder, and a mounting block. The mounting base is installed in the mounting space of the lower mold base. The inclined surface is formed on the upper surface of the mounting base and inclined towards the molding cavity. The inclined groove is formed on the inclined surface from the end of the mounting base away from the lower mold base and along the inclined direction of the inclined surface. The driving cylinder is installed on the end of the mounting base away from the lower mold base and its output end extends into the inclined groove. The mounting block is fixedly installed on the output end of the driving cylinder. The forming moving punch is fixedly installed on the mounting block.

[0008] By adopting the above technical solution, the lower mold base and the upper mold base are installed on the injection molding machine. At this time, the lower mold base and the upper mold base are in the mold-closed state. The forming fixed cavity mold, the shell fixed punch, and the round shell fixed punch cooperate to form the cavity part of the mold cavity with a notch on the side. The forming moving punch extends into the cavity through the through-hole. Its arc protrusion fits tightly with the arc forming groove in the cavity, together forming the mold cavity structure of the semi-dome printer shell. Then the injection molding machine injects molten plastic into the cavity. After the plastic is fully filled and cooled, the semi-dome printer shell is formed. Then the drive cylinder is activated to retract, and the forming moving punch is driven to withdraw from the combined cavity through the output end. At this time, because the forming moving punch has withdrawn from the combined cavity, the space inside the product is no longer restricted by the forming moving punch, so that the injection molding machine can smoothly execute the demolding procedure, and the semi-dome printer shell can be ejected without obstruction. By setting the active withdrawal of the forming moving punch, the technical problem of the injection mold being difficult to demold the semi-dome printer shell in the prior art is solved.

[0009] Furthermore, the end of the forming moving punch near the driving cylinder and the end of the connecting cavity near the driving cylinder are provided with filling structures for filling the gap between the forming moving punch and the forming fixed die.

[0010] Furthermore, the filling structure includes an extended flange integrally disposed on both sides of the forming moving punch near the driving cylinder, and a chamfer formed on both sides of the connecting cavity near the driving cylinder for cooperating with the extended flange, wherein the extended flange is provided with a bevel for cooperating with the chamfer.

[0011] By adopting the above technical solution, although the active withdrawal of the forming moving punch solves the technical problem of difficult demolding of the semi-dome printer shell in existing injection molds, during the mold closing process, the two sides of the rear forming moving punch and the two side walls inside the connecting cavity will rub against each other, resulting in gaps between the two sides of the forming moving punch and the two side walls inside the connecting cavity after a period of use. This gap may cause molten material to seep out during injection. The filling structure solves this technical problem. With the filling structure, when the mold is closed, the extended flange at the end of the forming moving punch forms a tight fit with the chamfer of the beveled side wall of the connecting cavity through the bevel, directly sealing the gap between the two sides of the forming moving punch and the two side walls of the connecting cavity. This ensures normal sliding fit between the forming moving punch and the connecting cavity, while preventing injection leakage, and achieving the effect of improving the sealing performance of the mold and the quality of the injection molded product.

[0012] Furthermore, the mounting block is equipped with a cooling structure inside to reduce the temperature of the mounting block.

[0013] Furthermore, the cooling structure includes a cooling channel formed on the end face of the mounting block away from the forming moving punch, and a cooling pipe inserted into the cooling channel, with one end of the cooling pipe extending out of the cooling channel and having a connection interface.

[0014] Although the above technical solution solves the technical problem of difficult demolding of the semi-dome printer shell by the active withdrawal of the forming moving punch, there are still equipment safety hazards caused by heat conduction during actual production. Specifically, during the injection molding stage, the molten plastic raw material comes into direct contact with the moving mold. The heat from the high-temperature plastic is continuously conducted through the metal moving mold to the connected mounting block assembly, and then transferred to the piston rod and cylinder body of the drive cylinder through the heat conduction path. Considering that the upper limit of the working temperature of the drive cylinder as the core power component is usually no more than 65℃, while the instantaneous temperature of the molten plastic during injection molding can reach 220-280℃, the heat accumulation effect caused by this temperature difference can easily lead to aging of hydraulic seals, deterioration of lubricating oil, and thermal deformation of metal parts, seriously affecting the reliability and service life of the equipment. The cooling structure solves this technical problem. By setting up the cooling structure, the cooling pipe is connected to the cooling water circuit of the injection molding machine through the connection interface, so that the coolant of the injection molding machine can flow into the cooling pipe through the cooling water circuit, so that the cooling pipe cools the mounting block, preventing the drive cylinder from being affected by high temperature and causing problems such as aging of hydraulic seals, deterioration of lubricating oil, and thermal deformation of metal parts.

[0015] Furthermore, at least two cooling channels are provided, and each cooling channel is equipped with a cooling pipe. The mounting block has a movable space inside that connects to the cooling channels, and a return pipe assembly is provided inside the movable space, which is connected to the cooling pipe.

[0016] While the above technical solution can prevent the hydraulic cylinder from being affected by high temperatures, leading to problems such as aging of hydraulic seals, deterioration of lubricating oil, and thermal deformation of metal parts, the coolant does not flow back after cooling the mounting block in the cooling pipes. This is because a return pipe is required, necessitating connections between the cooling pipes and other pipes. This connection restricts the movement of the mounting block, making it difficult for the forming punch to close. However, without other pipes, coolant return is difficult, resulting in low cooling efficiency of the cooling structure. The design of the return pipe assembly and the moving space solves this technical problem. By connecting the two cooling pipes through the return pipe assembly, the coolant can be returned through the return pipe assembly, thereby improving the cooling efficiency of the cooling structure. At the same time, due to the setting of the moving space, when the mounting block moves with the forming punch, the return pipe assembly can not obstruct the movement of the mounting block. This achieves the goal of improving the cooling efficiency of the cooling structure without affecting the movement of the mounting block. Furthermore, because the return pipe assembly is inside the mounting block, it can further cool the mounting block, further improving the cooling efficiency of the cooling structure.

[0017] Furthermore, the lower mold base edge and the upper mold base edge are provided with guide mechanisms to facilitate the closing of the lower mold base and the upper mold base.

[0018] Furthermore, the guiding mechanism includes multiple guide posts fixedly disposed on the edge of the lower mold base and multiple guide holes formed on the upper mold base for cooperating with the guide posts.

[0019] By adopting the above technical solution, when the injection molding machine moves the upper mold base downward to close with the lower mold base, the guide pin first enters the guide hole. Through the precise fit between the two (such as H7 / h6 or H7 / f7 clearance fit), the vertical alignment of the upper and lower mold bases is ensured. This design effectively avoids lateral forces when the mold closes and prevents misalignment of the punch and die.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. By setting up the molding moving punch and the driving device, after the injection molded part of the semi-dome printer shell is molded, the driving cylinder can be activated to retract, and the molding moving punch will be driven to exit from the combined cavity through the output end. At this time, because the restriction of the molding moving punch on the product is removed, the injection molding machine can smoothly execute the demolding procedure, and the semi-dome printer shell can be ejected without obstruction. By setting the active withdrawal of the molding moving punch, the technical problem of the injection mold being difficult to demold the semi-dome printer shell in the prior art is solved.

[0022] 2. By filling the gap structure, when the mold is closed, the extended flange at the end of the forming moving punch forms a tight fit with the chamfer of the inclined surface of the connecting cavity sidewall through the inclined surface, directly sealing the axial fit gap. This ensures normal sliding fit between the forming moving punch and the connecting cavity, while preventing injection leakage, thus improving the sealing performance of the mold and the quality of the injection molded product.

[0023] 3. By setting up a return pipe assembly and a moving space, the return pipe assembly connects the two cooling pipes, allowing the coolant to return through the return pipe assembly, thereby improving the cooling efficiency of the cooling structure. At the same time, due to the setting of the moving space, when the mounting block moves with the forming punch, the return pipe assembly can move without obstructing the movement of the mounting block. This achieves the goal of improving the cooling efficiency of the cooling structure without affecting the movement of the mounting block. Furthermore, because the return pipe assembly can further cool the mounting block inside, the cooling efficiency of the cooling structure is further improved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the specific structure of the semi-dome printer casing after it has been formed in the manufacturing mold.

[0025] Figure 2 This is a schematic diagram of the specific structure of the semi-dome printer casing after it has been aligned.

[0026] Figure 3 This is a schematic diagram of the overall structure of the embodiment;

[0027] Figure 4 yes Figure 3 Enlarged view of section A in the middle;

[0028] Figure 5 This is a bottom view of the overall structure of the embodiment;

[0029] Figure 6 This is a bottom view of the forming die;

[0030] Figure 7 This is a top view of the housing's fixed punch;

[0031] Figure 8 This is a schematic diagram of the specific structure after the forming fixed concave mold, the shell fixed convex mold, the round shell fixed convex mold, and the forming moving convex mold are closed in the embodiment;

[0032] Figure 9 yes Figure 8 Enlarged view of section B in the middle;

[0033] Figure 10 This is a schematic diagram of the overall structure of the embodiment after concealing the mounting block and the forming moving punch.

[0034] Reference numerals: 1. Lower mold base; 10. Lower mold cavity; 11. Shell fixed punch; 12. Forming cavity; 13. Round shell fixed punch; 14. Arc forming groove; 2. Upper mold base; 20. Upper mold cavity; 21. Forming fixed concave die; 22. Connecting cavity; 3. Drive device; 30. Mounting base; 31. Inclined surface; 32. Inclined groove; 33. Drive cylinder; 34. Mounting block; 4. Forming moving punch; 40. Rectangular part; 41. Arc protrusion; 5. Filling structure; 50. Extension flange; 51. Chamfer; 6. Cooling structure; 60. Cooling pipe; 61. Connection interface; 62. Return pipe assembly; 7. Guide mechanism; 70. Guide post; 71. Guide hole; 8. Semi-dome printer shell; 80. Shell; 81. Opening; 82. Arc-shaped through-hole; 83. Circular shell. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] Reference Figure 1 , Figure 2 The semi-dome-shaped printer housing 8 is a quarter-circular shell 80 with an opening 81 at the bottom, an inclined arc-shaped through-hole 82 on one side, and a circular shell 83 with a groove fixed at the top. Because the arc-shaped through-hole 82 is angled, it is difficult to demold using a side-pulling method, resulting in mold jamming during the production of the semi-dome-shaped printer housing 8. This limits current technology to manufacturing the semi-dome-shaped printer housing 8 only through 3D printing. However, the production efficiency of the semi-dome-shaped printer housing 8 manufactured by 3D printing is very low because 3D printing gradually forms the semi-dome-shaped printer housing 8 by depositing thermoplastic material layer by layer. In contrast, an injection mold only needs to inject molten plastic into the mold cavity to fill it and form the injection molded part of the semi-dome-shaped printer housing 8. However, the injection mold is difficult to demold the semi-dome-shaped printer housing 8. Therefore, this embodiment proposes a printer housing manufacturing mold.

[0037] A printer casing manufacturing mold, reference Figures 3 to 7 The system includes a lower mold base 1 and an upper mold base 2. The lower mold base 1 has a lower mold cavity 10, in which a housing fixed punch 11 is installed. A forming cavity 12 is provided through one side of the housing fixed punch 11, and a round shell fixed punch 13 is installed on one side of the forming cavity 12. The upper mold base 2 has an upper mold cavity 20 corresponding to the lower mold cavity 10, in which a forming fixed concave die 21 is provided. The forming fixed concave die 21 is used to cooperate with the round shell fixed punch 13 to form the mold cavity of the round shell 83 of the target semi-dome printer housing 8. A connecting cavity 22 is provided through one side of the forming fixed concave die 21 to cooperate with the forming cavity 12. The forming cavity 12 and the connecting cavity 22 are used to cooperate with the housing fixed punch 11 to form a shape. Figure 1 and Figure 2 The cavity of the housing 80 of the semi-domed printer shown has a die cavity. A drive device 3 is mounted at an angle on the lower die base 1, away from the fixed punch 13 of the circular shell. The output end of the drive device 3 faces the forming cavity 12. A moving forming punch 4 is mounted on the output end of the drive device 3. The moving forming punch 4 is... Figure 1 and Figure 2 The mold cavity of the semi-domed printer housing 8 shown has a punch, and the forming moving punch 4 is used to extend into the cavity formed by the forming cavity 12 and the connecting cavity 22 in conjunction with the housing fixed punch 11 to form the final mold cavity of the semi-domed printer housing 80. The lower mold base 1 and the upper mold base 2 are both provided with an installation space for accommodating the driving device 3 on the side near the driving device 3. The cavity formed by the forming cavity 12 and the connecting cavity 22 in conjunction with the housing fixed punch 11 has a notch on the side near the driving device 3 for the forming moving punch 4 to enter.

[0038] Specifically, the forming moving punch 4 includes a rectangular portion 40 and an arc-shaped protrusion 41. The rectangular portion 40 forms the shell of the semi-domed printer housing 8. The arc-shaped protrusion 41 is integrally formed with the rectangular portion 40 and forms the arc-shaped opening 82 of the semi-domed printer housing 8. The bottom surface of the forming cavity 12 near the circular shell fixed punch 13 is provided with an arc-shaped forming groove 14 for matching the arc-shaped protrusion 41 to form the arc-shaped opening 82 of the semi-domed printer housing 8 (see reference). Figure 7 ).

[0039] The drive device 3 includes a mounting base 30, an inclined surface 31, an inclined groove 32, a drive cylinder 33, and a mounting block 34. The mounting base 30 is installed in the mounting space of the lower mold base 1. The inclined surface 31 is located on the upper surface of the mounting base 30 and is inclined towards the molding cavity 12. The inclined groove 32 is opened on the inclined surface 31 from the end of the mounting base 30 away from the lower mold base 1 and along the inclined direction of the inclined surface 31. The drive cylinder 33 is installed at the end of the mounting base 30 away from the lower mold base 1 and its output end extends into the inclined groove 32. The mounting block 34 is fixedly installed on the output end of the drive cylinder 33. The forming moving punch 4 is fixedly installed on the mounting block 34.

[0040] Reference Figure 6 and Figure 7 The housing fixed punch 11 is specifically a metal body with irregularly shaped trapezoidal edges. The forming cavity 12 is located in the middle of this metal body, forming an irregular U-shaped metal body. The round shell fixed punch 13 is located on the side of the metal body away from the driving device 3, and is located in the middle of the recessed part of the metal body. The forming fixed die 21 is a rectangular metal body with an opening on its front that penetrates through the metal body. Figure 6For example, the forming die 21 is an irregular concave shape when viewed from the side. Through this opening, the forming die 21 can be combined with the protruding part of the housing die 11.

[0041] The lower mold base 1 and the upper mold base 2 are installed on the injection molding machine. At this time, the lower mold base 1 and the upper mold base 2 are in the closed mold state. The forming fixed cavity 21, the shell fixed punch 11 and the round shell fixed punch 13 cooperate to form the cavity part of the mold cavity with a notch on the side. The forming movable punch 4 extends into the cavity through the through-hole. Its arc protrusion 41 fits tightly with the arc forming groove 14 in the cavity, together forming the mold cavity structure of the semi-dome printer shell 8. Then the injection molding machine injects molten plastic into the cavity. After the plastic is fully filled and cooled, it forms the mold cavity. The semi-domed printer housing 8 is then activated, and the drive cylinder 33 retracts, driving the forming moving punch 4 to exit from the combined cavity through the output end. At this time, because the forming moving punch 4 has exited from the combined cavity, the internal space of the product is no longer restricted by the forming moving punch 4, allowing the injection molding machine to smoothly execute the demolding procedure, so that the semi-domed printer housing 8 can be ejected without obstruction. Through the active withdrawal setting of the forming moving punch 4, the technical problem of the injection mold being difficult to demold the semi-domed printer housing 8 in the prior art is solved.

[0042] In other embodiments, the drive cylinder 33 of the drive device 3 may be a pneumatic cylinder or an electric cylinder.

[0043] Although the active withdrawal of the forming moving punch 4 solves the technical problem of difficult demolding of the semi-dome printer housing 8 in existing injection molds, during the mold closing process, the two sides of the rear forming moving punch 4 rub against the two side walls inside the connecting cavity 22. This results in gaps between the two sides of the forming moving punch 4 and the two side walls inside the connecting cavity 22 after a period of use. These gaps may cause molten material to seep out during injection molding. To solve this technical problem, this embodiment provides a filling structure 5 at the end of the forming moving punch 4 near the drive cylinder 33 and at the end of the connecting cavity 22 near the drive cylinder 33 to fill the gap between the forming moving punch 4 and the forming fixed die 21. (Refer to...) Figure 8 and Figure 9 The filling structure 5 includes an extension flange 50 integrally disposed on both sides of the forming moving punch 4 near the driving cylinder 33, and a chamfer 51 opened on both sides of the connecting cavity 22 near the driving cylinder 33 for cooperating with the extension flange 50. The extension flange 50 is provided with a bevel for cooperating with the chamfer 51.

[0044] By filling the gap in structure 5, when the mold is closed, the extended flange 50 at the end of the forming moving punch 4 forms a tight fit with the chamfer of the inclined surface of the side wall of the connecting cavity 22 through the inclined surface, directly forming the gap between the two sides of the forming moving punch 4 and the two side walls of the connecting cavity 22. This ensures normal sliding fit between the forming moving punch 4 and the connecting cavity 22, while preventing injection leakage, thus improving the sealing performance of the mold and the quality of the injection molded product.

[0045] In other embodiments, the filling structure 5 can be a spring filling structure, specifically: receiving grooves opened on both sides of the connecting cavity 22, sealing strips inserted into the receiving grooves for extruding and molding the moving punch 4 on both sides, and springs fixedly installed in the receiving grooves for pushing the sealing strips to extrude and mold the moving punch 4 on both sides. The implementation process is as follows: when the mold is closed, the two sides of the end of the molding moving punch 4 push the sealing strips to compress the springs, causing the sealing strips to retract into the receiving grooves. At the same time, the compressed springs push the sealing strips to extrude and mold the two sides of the end of the molding moving punch 4, sealing the gap between the two sides of the end of the molding moving punch 4 and the connecting cavity 22, preventing injection leakage. While the spring-filled structure can also ensure proper sliding fit between the moving punch 4 and the connecting cavity 22 while preventing injection leakage, its installation process is more complex than that of the filling structure 5 in this embodiment. It requires creating a receiving groove within the connecting cavity 22 and installing a spring and a sealing strip within the groove. In contrast, the filling structure 5 in this embodiment only requires pre-leaving a beveled extension flange 50 at the end of the moving punch 4 during production, and then chamfering both sides of the end of the connecting cavity 22. Furthermore, the production cost of the filling structure 5 in this embodiment is significantly lower than that of the spring-filled structure 5. However, the spring-filled structure 5 has a longer service life than the filling structure 5 in this embodiment. Wear of the extension flange 50 in the filling structure 5 will affect the sealing effect to some extent. In contrast, the spring-filled structure 5 uses a spring to push the sealing strip for sealing; therefore, after the sealing strip wears, the spring's thrust can compensate for the wear distance, resulting in a longer service life compared to the filling structure 5 in this embodiment.

[0046] Although the active withdrawal of the moving punch 4 solves the technical problem of difficult demolding of the semi-dome printer housing 8 by existing injection molds, there are still equipment safety hazards caused by heat conduction during actual production. Specifically, during the injection molding stage, the molten plastic raw material is in direct contact with the moving punch 4. The heat from the high-temperature plastic is continuously conducted through the metal moving punch 4 to the connected mounting block 34 assembly, and then transferred to the piston rod and cylinder body of the drive cylinder 33 through the heat conduction path. Considering that the upper limit of the working temperature of the drive cylinder 33 as the core power component is usually no more than 65°C, while the instantaneous temperature of the molten plastic during injection molding can reach 220-280°C, the heat accumulation effect caused by this temperature difference can easily cause aging of hydraulic seals, deterioration of lubricating oil, and thermal deformation of metal parts, seriously affecting the reliability and service life of the equipment. To solve this technical problem, this embodiment provides a cooling structure 6 inside the mounting block 34 to reduce the temperature of the mounting block 34. Figure 10 The cooling structure 6 includes a cooling channel (not shown in the figure) opened on the end face of the mounting block 34 away from the forming moving punch 4 and opened on the mounting block 34 in the inclined direction of the inclined surface 31, and a cooling pipe 60 inserted into the cooling channel. One end of the cooling pipe 60 extends out of the cooling channel and is provided with a connection interface 61.

[0047] By setting up the cooling structure 6, the cooling pipe 60 is connected to the cooling water circuit of the injection molding machine through the connection interface 61, so that the coolant of the injection molding machine can flow into the cooling pipe 60 through the cooling water circuit, thereby cooling the mounting block 34 by the cooling pipe 60, so as to prevent the hydraulic seals from aging, the lubricating oil from deteriorating and the metal parts from being affected by high temperature in the drive cylinder 33.

[0048] Although the cooling structure 6 can prevent the hydraulic seals from aging, the lubricating oil from deteriorating, and the metal parts from being affected by high temperature in the drive cylinder 33, the coolant will not flow back after it flows into the cooling pipe 60 to cool the mounting block 34. This is because a return pipe is required, which necessitates the connection of the cooling pipe 60 with other pipes. This results in the connection between the cooling pipe 60 and other pipes restricting the movement of the mounting block 34, making it difficult for the forming moving punch 4 to close. However, without other pipes, it is difficult to allow the coolant to flow back, resulting in low cooling efficiency of the cooling structure 6. To solve this technical problem, this embodiment sets at least two cooling channels, and each cooling channel is equipped with a cooling pipe 60. The mounting block 34 has a moving space (not shown in the figure) that connects to the cooling channels. The moving space is equipped with a return pipe group 62, which connects to the cooling pipe 60.

[0049] The two cooling pipes 60 are connected by the return pipe assembly 62, allowing the coolant to return through the return pipe assembly 62, thereby improving the cooling efficiency of the cooling structure 6. At the same time, due to the setting of the moving space, when the mounting block 34 drives the forming moving punch 4 to move, the return pipe assembly 62 can move without obstructing the movement of the mounting block 34. This achieves the effect of improving the cooling efficiency of the cooling structure 6 without affecting the movement of the mounting block 34. Furthermore, because the return pipe assembly 62 can further cool the mounting block 34 inside the mounting block 34, the cooling efficiency of the cooling structure 6 is further improved.

[0050] In this embodiment, the lower mold base 1 and the upper mold base 2 are provided with guide mechanisms 7 to facilitate the mold closing of the lower mold base 1 and the upper mold base 2. The guide mechanism 7 includes a plurality of guide posts 70 fixedly disposed on the edge of the lower mold base 1 and a plurality of guide holes 71 opened on the upper mold base 2 for cooperating with the guide posts 70.

[0051] There are four guide pillars 70, which are fixedly installed at the four corners of the lower mold base 1. Similarly, there are four guide holes 71, which are opened at the four corners of the upper mold base 2, corresponding to the four guide pillars 70.

[0052] When the injection molding machine moves the upper mold base 2 downward to close with the lower mold base 1, the guide post 70 first enters the guide hole 71. Through the precise fit between the two (such as H7 / h6 or H7 / f7 clearance fit), the vertical alignment of the upper mold base 2 and the lower mold base 1 is ensured. This design effectively avoids lateral forces when the mold closes and prevents misalignment of the punch and die.

[0053] Specific implementation process: Install the upper mold base 2 and the lower mold base 1 on the injection molding machine, then adjust the parameters of the injection molding machine, and then start the injection molding machine. The injection molding machine drives the upper mold base 2 to move down and close with the lower mold base 1. The guide post 70 first enters the guide hole 71. As the upper mold base 2 moves, the upper mold base 2 and the lower mold base 1 are completely closed, so that the forming fixed concave mold 21, the shell fixed punch 11 and the round shell fixed punch 13 cooperate to form a mold cavity with a side opening. Then, start the drive cylinder 33 to extend, so that the output end of the drive cylinder 33 pushes the forming moving punch 4 to extend into the cavity through the opening. Its arc protrusion 41 is closely fitted with the arc forming groove 14 in the cavity, which together form the cavity structure of the semi-domed printer shell 8. At the same time, the extension flange 50 provided at the end of the forming moving punch 4 is closely fitted with the chamfer of the inclined surface of the side wall of the connecting cavity 22 through the inclined surface, directly sealing the axial fit gap.

[0054] Then the injection molding machine injects molten plastic into the cavity. After the plastic is fully filled and cooled, a semi-domed printer housing 8 is formed. Then the drive cylinder 33 is activated to retract, and the forming moving punch 4 is driven out of the combined cavity through the output end. At this time, because the restriction of the forming moving punch 4 on the product is removed, the injection molding machine can smoothly execute the demolding procedure, and the semi-domed printer housing 8 can be ejected without obstruction.

[0055] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A printer housing manufacturing mold characterized by comprising: The utility model provides a half dome type printer shell moulding device, including lower die seat and upper die seat, the lower die seat is opened with lower die cavity, the lower die cavity installs the shell fixed male die, the shell fixed male die one side penetrates and is opened with forming cavity, the forming cavity one side installs the round shell fixed male die, the upper die seat is opened with the upper die cavity corresponding lower die cavity, the upper die cavity is provided with forming fixed female die, the forming fixed female die is used for cooperating round shell fixed male die to form target half dome type printer shell round shell cavity, the forming fixed female die one side is opened with the connecting cavity that cooperates with forming cavity in the inclination, the forming cavity and connecting cavity are used for cooperating shell fixed male die to form the female die of target half dome type printer shell shell cavity, the lower die seat is installed with drive arrangement in the inclination of far away from round shell fixed male die one side, drive arrangement output end is towards forming cavity, drive arrangement output end is installed with forming dynamic male die, the lower die seat and upper die seat are opened with the installation space for accommodating drive arrangement in the inclination of close drive arrangement one side, the forming dynamic male die is used for entering the female die that forms the final half dome type printer shell shell cavity in the female die that the shell fixed male die is combined to form with forming cavity and connecting cavity cooperation, the female die that forming cavity and connecting cavity cooperate shell fixed male die combination forms one side close drive arrangement has the gap for forming dynamic male die enters, the forming dynamic male die includes rectangle and circular arc convex part, the rectangle is used for forming the shell body of half dome type printer shell, the circular arc convex part is integrally formed with rectangle and is used for forming the arc mouth of half dome type printer shell, the forming cavity is opened with circular arc forming groove for cooperating circular arc convex part to form the arc mouth of half dome type printer shell in the bottom surface of one side close round shell fixed male die.

2. The printer housing manufacturing mold of claim 1, wherein, The drive device includes a mounting base, an inclined surface, an inclined groove, a drive cylinder, and a mounting block. The mounting base is mounted on the installation space of the lower die seat. The inclined surface is inclined towards the forming cavity on the upper surface of the mounting base. The inclined groove is through-opened on the inclined surface from the end of the mounting base away from the lower die seat and along the inclined direction of the inclined surface. The drive cylinder is mounted on the end of the mounting base away from the lower die seat, and the output end of the drive cylinder extends into the inclined groove. The mounting block is fixedly mounted on the output end of the drive cylinder. The forming dynamic male die is fixedly mounted on the mounting block.

3. The printer housing manufacturing mold of claim 2, wherein, The end of the forming dynamic male die close to the drive cylinder and the end of the connecting cavity close to the drive cylinder are provided with a filling structure for filling the gap between the forming dynamic male die and the forming fixed female die.

4. The printer housing manufacturing mold of claim 3, wherein, The filling structure includes two extension flanges integrally arranged on both sides of the end of the forming dynamic male die close to the drive cylinder, and two bevel chamfers opened on both sides of the end of the connecting cavity close to the drive cylinder and used for cooperating with the extension flanges. The extension flanges are provided with bevel surfaces used for cooperating with the bevel chamfers.

5. The printer housing manufacturing mold of claim 2, wherein, The mounting block is internally provided with a cooling structure for reducing the temperature of the mounting block.

6. The printer housing manufacturing mold of claim 5, wherein, The cooling structure includes a cooling channel opened on the end face of the mounting block away from the forming dynamic male die and along the inclined direction of the inclined surface, and a cooling pipeline inserted into the cooling channel. One end of the cooling pipeline extends out of the cooling channel and is provided with a connecting interface.

7. The printer housing manufacturing mold of claim 6, wherein, The cooling channel is provided with at least two cooling channels, and each cooling channel is provided with a cooling pipe; the installation block is internally provided with a moving space connected with the cooling channels; the moving space is internally provided with a return pipe group connected with the cooling pipes.

8. The printer housing manufacturing mold of claim 1, wherein, The lower die holder edge and the upper die holder edge are provided with a guide mechanism for facilitating the clamping of the lower die holder and the upper die holder.

9. The printer housing manufacturing mold of claim 8, wherein, The guide mechanism comprises a plurality of guide columns fixed on the lower die holder edge and a plurality of guide holes provided on the upper die holder for matching the guide columns.

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