Method for processing a smart device housing

Abstract

The application discloses a processing method of an intelligent device shell, and comprises the following steps: step 1, after injection molding is completed, the female mold plate drags the male mold plate to move upward together in a closed mold state by D1, in the process: the male mold pin installed with the pin springboard moves upward D1 to reach the stop point of the pin limiting structure under the action of the spring, and the inner wall of the hollow cylinder moves upward D1 relative to the fixed and unmoved plunger needle; step 2, the male mold plate continues to move upward until the male mold plate moves upward relative to the male mold pad by D2 to reach the stop point of the male mold limiting structure, so that the male mold plate no longer moves upward, in the process: the outer wall of the hollow cylinder moves upward by D2-D1 relative to the male mold pin which stops moving after the stroke is completed; step 3, the female mold plate continues to move upward and separates from the male mold plate, the ejector pin plate installed with the plunger moves upward under the driving of the injection molding machine ejector rod, so that the plunger which is in contact with the lower end surface of the hollow cylinder pushes the part upward to separate from the male mold pin. The application solves the problems of deformation and length size shortening of the long hollow cylinder in the demolding process.

Description

Technical Field

[0001] This invention relates to a processing method for the casing of a smart device, belonging to the field of injection mold technology. Background Technology

[0002] Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts.

[0003] Ejector sleeve ejection is one of the most common structures in injection molds. The components of the ejector sleeve assembly include the ejector sleeve and the ejector pin. The ejector pin forms the inner wall of the hollow column, while the ejector sleeve forms the bottom plane of the hollow column, and also functions to eject the hollow column. The ejector pin is fixed to the rear plate of the mold and will not move during mold opening and ejection. The ejector sleeve is fixed to the upper ejector plate, and the upper and lower ejector plates are fixed together by screws to form an ejection assembly. The ejector rod applies force to the lower ejector plate to separate the product from the mold core and the ejector pin.

[0004] However, ejection of the sleeve requires overcoming the friction and clamping force between the inner and outer walls of the hollow column of the product and the mold. The ejection area of ​​the sleeve structure is small, and the hollow column of the plastic product becomes shorter or deformed under the force during ejection. Summary of the Invention

[0005] The purpose of this invention is to provide a processing method for the casing of a smart device, which solves the problems of deformation and shortening of length of long hollow cylinders during demolding.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a processing method for the shell of a smart device, used for injection molding of parts, based on an injection mold, the injection mold comprising: a female template on which a female mold core is installed, a male template below the female template on which a male mold core is installed, a rear mold fixing plate below the male template, and two mold feet disposed between the male template and the rear mold fixing plate, the lower surface of each of the two mold feet being connected to the upper surface of the rear mold fixing plate, an ejector plate that can move up and down being horizontally disposed between the two mold feet, a cavity for molding the part being formed between the female mold core and the male mold core, the part comprising a body and a hollow column formed on the body; A mold base plate is provided below the mold template. The edges of the lower surface of the mold base plate are connected to the upper surfaces of two mold feet respectively. An insert spring plate is provided between the mold base plate and the mold template. A mold insert corresponding to the hollow column is installed on the insert spring plate. The upper part of the mold insert is embedded in the mold core. The upper part of the ejector sleeve connected to the ejector plate at one end passes through the through hole opened in the center of the mold insert. The upper part of the ejector pin fixedly installed on the rear mold fixing plate at one end is correspondingly embedded in the ejector sleeve. Thus, a sub-cavity for forming the hollow column is formed between the mold insert, the ejector sleeve, and the ejector pin. At least two springs in a compressed state are provided between the mold base plate and the insert spring plate. An insert limiting structure is connected between the bullet insertion springboard and the male mold pad or the rear mold fixing plate, so that the relative movement stroke between the bullet insertion springboard and the male mold pad is D1. A male mold limiting structure is connected between the male mold plate and the male mold pad, so that the relative movement stroke between the male mold plate and the male mold pad is D2 and D2 is greater than D1. The processing method includes the following steps: Step 1: After injection molding is completed, the female mold plate drags the male mold plate and moves upward together in the mold closed state by D1. During this process: the insert spring plate with the male mold insert installed moves upward with the male mold plate by D1 under the action of the spring and reaches the stop point of the insert limit structure. The ejector pin, which is relatively fixed on the inner wall of the hollow column, moves upward by D1. Step 2: The male template continues to move upward until it moves upward relative to the male mold pad by D2 and reaches the stop point of the male mold limiting structure, so that the male template stops moving upward. During this process: the outer wall of the hollow column moves upward by D2-D1 relative to the male mold insert that has completed its stroke and stopped moving. Step 3: The female mold plate continues to move upward and separates from the male mold plate. The ejector plate with the ejector sleeve is driven upward by the ejector rod of the injection molding machine, so that the ejector sleeve, which is in contact with the lower end face of the hollow column, pushes the part upward and separates it from the male mold core.

[0007] The following are further improvements to the above technical solution: 1. In the above scheme, the body of the part is formed with 4 hollow pillars, and the hollow pillars are mounting pillars.

[0008] 2. In the above scheme, the length of the hollow column is greater than 32mm.

[0009] 3. In the above scheme, D1 is less than the length of the hollow cylinder, and D2 is greater than the length of the hollow cylinder.

[0010] 4. In the above scheme, the insert limiting structure includes: a plurality of height limiting screws corresponding to the spring, the lower end of the height limiting screw connected to the insert spring plate at the upper end passes through the male mold pad and is embedded in the height limiting groove opened on the upper surface of the rear mold fixing plate, the lower end of the height limiting screw has a flange portion extending radially outward, when the insert spring plate and the male mold pad are in a fitted state, there is a stroke gap D1 between the upper end face of the flange portion and the lower surface of the male mold pad.

[0011] 5. In the above solution, the height limiting screw further includes a body and a limiting sleeve fitted on the outside of the body, the spring is fitted on the outside of the limiting sleeve, the flange is disposed on the limiting sleeve, and the limiting sleeve is slidably engaged with the mold pad.

[0012] 6. In the above scheme, the male mold limiting structure includes: a male mold limiting screw with one end fixedly connected to the male mold pad or male mold template, and a male mold limiting sleeve fitted on the outside of the male mold limiting screw. The other end of the male mold limiting screw is embedded in a limiting groove opened on the male mold template or male mold pad. One end of the male mold limiting sleeve located in the limiting groove has a limiting flange portion extending radially outward. When the male mold pad and the male mold template are in a fitted state, there is a travel gap D2 between the limiting flange portion and the inner wall of one end of the limiting groove.

[0013] 7. In the above scheme, the lower end of the male mold limiting screw is fixedly connected to the male mold pad, and the upper surface of the male mold template is provided with the limiting groove. When the male mold pad and the male mold template are in a fitted state, the gap between the lower surface of the limiting flange and the lower inner wall of the limiting groove is D2.

[0014] 8. In the above scheme, the ejector plate further includes an upper ejector plate and a lower ejector plate, and the stacked upper ejector plate and lower ejector plate are fixedly connected by screws, and the sleeve is installed on the upper ejector plate.

[0015] 9. In the above scheme, at least two center support rods are connected between the rear mold fixing plate and the male mold pad plate. The center support rods pass through the ejector plate and slide with the ejector plate through a center support rod sleeve.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The present invention discloses a processing method for the housing of a smart device. In the demolding process of an injection-molded part with a hollow cylinder, the part is moved upward and demolded in three sections. During the demolding process of the first two sections, the part is covered in multiple directions. This avoids the situation where the hollow cylinder is shortened or deformed due to excessive clamping force between the hollow cylinder and the ejector pin, thereby improving the appearance accuracy and yield of the product. Attached Figure Description

[0017] AppendixFigure 1 This is a schematic diagram of the structure of the part in this invention; Appendix Figure 2 This is a schematic diagram of the injection mold in this invention; Appendix Figure 3 This is a cross-sectional view of the injection mold in this invention; Appendix Figure 4 This is a structural schematic diagram of step 1 in the processing method of the smart device shell of the present invention; Appendix Figure 5 This is a schematic diagram of step 2 in the processing method of the smart device shell of the present invention; Appendix Figure 6 This is a structural schematic diagram of step 3 in the processing method of the smart device shell of the present invention.

[0018] In the attached diagrams: 1. Female mold plate; 2. Female mold core; 3. Opener / closer; 4. Male mold core; 5. Male mold plate; 6. Male mold insert; 7. Ejector sleeve; 8. Ejector sleeve pin; 9. Upper ejector plate; 10. Lower ejector plate; 11. Height limiting sleeve; 12. Spring; 13. Height limiting screw; 131. Flange; 14. Male mold pad; 15. Mold foot; 16. Upper ejector plate; 17. Lower ejector plate; 18. Rear mold fixing plate; 19. Heat insulation plate; 20. Middle support; 21. Middle support sleeve; 22. Return pin; 23. Return pin spring; 24. Stop block; 251. Male mold limiting screw; 252. Male mold limiting sleeve; 253. Limiting flange; 26. Guide post; 27. Guide sleeve; 100. Part; 101. Body; 102. Hollow column. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments: In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0020] Example 1: A processing method for a smart device housing, used for injection molding of part 100, based on an injection mold, the injection mold including: a female template 1 with a female mold core 2 installed, a male template 5 located below the female template 1 and with a male mold core 4 installed, a rear mold fixing plate 18 located below the male template 5, and two mold feet 15 disposed between the male template 5 and the rear mold fixing plate 18, the lower surface of each of the two mold feet 15 being connected to the upper surface of the rear mold fixing plate 18, and a vertically movable ejector plate being horizontally disposed between the two spaced mold feet 15, the female mold core 2 and the male mold core 4 forming a cavity for molding the part 100, the part 100 including a body 101 and a hollow column 102 formed on the body 101; A male mold base plate 14 is provided below the male mold template 5. The edges of the lower surface of the male mold base plate 14 are connected to the upper surfaces of the two mold feet 15 respectively. An insert plate is provided between the male mold base plate 14 and the male mold template 5. A male mold insert 6 corresponding to the hollow column 102 is installed on the insert plate. The upper part of the male mold insert 6 is embedded in the male mold core 4, and the upper part of the ejector sleeve 7 connected to the ejector plate at one end passes through the through hole opened in the center of the male mold insert 6. The lower end is fixedly installed on the rear mold fixing plate 1. The upper part of the ejector pin 8 on the mold 8 is correspondingly embedded in the ejector sleeve 7, thereby forming a sub-cavity for molding the hollow column 102 between the male mold insert 6, the ejector sleeve 7, and the ejector pin 8. The male mold insert is used to mold the outer wall of the hollow column, the ejector pin is used to mold the inner wall of the hollow column, and the ejector sleeve is used to mold the lower end face of the hollow column. The molded hollow column is tightly wrapped around the ejector pin, making it difficult for the molded part to be demolded. At least two springs 12 in a compressed state are provided between the male mold pad 14 and the insert spring jump plate. An insert limiting structure is connected between the bullet insertion springboard and the male mold pad 14 or the rear mold fixing plate 18, so that the relative movement stroke between the bullet insertion springboard and the male mold pad 14 is D1. A male mold limiting structure is connected between the male mold plate 5 and the male mold pad 14, so that the relative movement stroke between the male mold plate 5 and the male mold pad 14 is D2 and D2 is greater than D1. The processing method includes the following steps: Step 1: After injection molding is completed, the female mold plate 1 drags the male mold plate 5 and moves upward together D1 in the mold closing state. During this process: the insert spring plate with the male mold insert 6 installed moves upward with the male mold plate 5 under the action of the spring 12 and reaches the stop point of the insert limit structure. The inner wall of the hollow column 102 moves upward relative to the fixed ejector pin 8, D1, to complete the core pulling action of the inner wall of the first section of the hollow column. Step 2: The male template 5 continues to move upward until it moves upward relative to the male mold pad 14 by D2 and reaches the stop point of the male mold limiting structure, so that the male template 5 stops moving upward. During this process, the male mold insert 6, which has stopped moving after the relative stroke of the outer wall of the hollow column 102 is completed, moves upward by D2-D1 to complete the demolding action of the second section of the hollow column outer wall forming surface. Step 3: The female mold plate 1 continues to move upward and separates from the male mold plate 5. The ejector plate with the ejector sleeve 7 is driven upward by the ejector rod of the injection molding machine, so that the ejector sleeve 7, which is in contact with the lower end face of the hollow column 102, pushes the part 100 upward and separates it from the male mold core 4, completing the third stage of ejection and demolding action.

[0021] The body 101 of the aforementioned part 100 has four hollow pillars 102 formed on it. The hollow pillars 102 are mounting pillars. The length of the hollow pillars 102 is greater than 32mm. D1 is less than the length of the hollow pillars 102, and D2 is greater than the length of the hollow pillars 102. The aforementioned insert limiting structure includes: a plurality of height limiting screws 13 corresponding to the aforementioned spring 12. The lower ends of the aforementioned height limiting screws 13, which are connected to the insert bullet jump plate at their upper ends, pass through the male mold pad plate 14 and are embedded in the height limiting groove opened on the upper surface of the rear mold fixing plate 18. The lower end of the aforementioned height limiting screw 13 has a radially outward flange portion 131. When the insert bullet jump plate and the male mold pad plate 14 are in a fitted state, there is a stroke gap D1 between the upper end surface of the aforementioned flange portion 131 and the lower surface of the male mold pad plate 14. The aforementioned height limiting screw 13 further includes a body and a limiting sleeve 11 fitted on the outside of the body, the aforementioned spring 12 fitted on the outside of the limiting sleeve 11, the aforementioned flange portion 131 disposed on the limiting sleeve 11, and the aforementioned limiting sleeve 11 slidingly engaging with the mold pad 14. The above-mentioned mold limiting structure includes: a mold limiting screw 251 fixedly connected at one end to the mold pad 14 or the mold template 5, and a mold limiting sleeve 252 fitted on the outside of the mold limiting screw 251. The other end of the mold limiting screw 251 is embedded in a limiting groove opened on the mold template 5 or the mold pad 14. One end of the mold limiting sleeve 252 located in the limiting groove has a limiting flange 253 extending radially outward. When the mold pad 14 and the mold template 5 are in a fitted state, there is a travel gap D2 between the limiting flange 253 and the inner wall of one end of the limiting groove. The lower end of the aforementioned male mold limiting screw 251 is fixedly connected to the male mold pad 14. The aforementioned limiting groove is provided on the upper surface of the aforementioned male mold template 5. When the male mold pad 14 and the male mold template 5 are in a fitted state, the gap between the lower surface of the aforementioned limiting flange 253 and the inner wall of the lower end of the limiting groove is D2.

[0022] Example 2: A processing method for a smart device shell, used for injection molding of part 100, based on an injection mold, the injection mold including: a female template 1 with a female mold core 2 installed, a male template 5 located below the female template 1 and with a male mold core 4 installed, a rear mold fixing plate 18 located below the male template 5, and two mold feet 15 disposed between the male template 5 and the rear mold fixing plate 18, the lower surface of each of the two mold feet 15 being connected to the upper surface of the rear mold fixing plate 18, a vertically movable ejector plate being horizontally disposed between the two spaced mold feet 15, a cavity for molding the part 100 being formed between the female mold core 2 and the male mold core 4, the part 100 including a body 101 and a hollow column 102 formed on the body 101; A male mold base plate 14 is provided below the male mold template 5. The edges of the lower surface of the male mold base plate 14 are connected to the upper surfaces of the two mold feet 15 respectively. An insert plate is provided between the male mold base plate 14 and the male mold template 5. A male mold insert 6 corresponding to the hollow column 102 is installed on the insert plate. The upper part of the male mold insert 6 is embedded in the male mold core 4, and the upper part of the ejector sleeve 7 connected to the ejector plate at one end passes through the through hole opened in the center of the male mold insert 6. The lower end is fixedly installed on the rear mold fixing plate 1. The upper part of the ejector pin 8 on the mold 8 is correspondingly embedded in the ejector sleeve 7, thereby forming a sub-cavity for molding the hollow column 102 between the male mold insert 6, the ejector sleeve 7, and the ejector pin 8. The male mold insert is used to mold the outer wall of the hollow column, the ejector pin is used to mold the inner wall of the hollow column, and the ejector sleeve is used to mold the lower end face of the hollow column. The molded hollow column is tightly wrapped around the ejector pin, making it difficult for the molded part to be demolded. At least two springs 12 in a compressed state are provided between the male mold pad 14 and the insert spring jump plate. An insert limiting structure is connected between the bullet insertion springboard and the male mold pad 14 or the rear mold fixing plate 18, so that the relative movement stroke between the bullet insertion springboard and the male mold pad 14 is D1. A male mold limiting structure is connected between the male mold plate 5 and the male mold pad 14, so that the relative movement stroke between the male mold plate 5 and the male mold pad 14 is D2 and D2 is greater than D1. The processing method includes the following steps: Step 1: After injection molding is completed, the female mold plate 1 drags the male mold plate 5 and moves upward together D1 in the mold closing state. During this process: the insert spring plate with the male mold insert 6 installed moves upward with the male mold plate 5 under the action of the spring 12 and reaches the stop point of the insert limit structure. The inner wall of the hollow column 102 moves upward relative to the fixed ejector pin 8, D1, to complete the core pulling action of the inner wall of the first section of the hollow column. Step 2: The male template 5 continues to move upward until it moves upward relative to the male mold pad 14 by D2 and reaches the stop point of the male mold limiting structure, so that the male template 5 stops moving upward. During this process, the male mold insert 6, which has stopped moving after the relative stroke of the outer wall of the hollow column 102 is completed, moves upward by D2-D1 to complete the demolding action of the second section of the hollow column outer wall forming surface. Step 3: The female mold plate 1 continues to move upward and separates from the male mold plate 5. The ejector plate with the ejector sleeve 7 is driven upward by the ejector rod of the injection molding machine, so that the ejector sleeve 7, which is in contact with the lower end face of the hollow column 102, pushes the part 100 upward and separates it from the male mold core 4, completing the third stage of ejection and demolding action.

[0023] The aforementioned ejector plate further includes an upper ejector plate 16 and a lower ejector plate 17. The stacked upper ejector plate 16 and lower ejector plate 17 are fixedly connected by screws, and the aforementioned sleeve 7 is installed on the upper ejector plate 16. At least two center support rods 20 are connected between the aforementioned rear mold fixing plate 18 and the male mold pad plate 14. The center support rods 20 pass through the aforementioned ejector plate and slide with the ejector plate through a center support sleeve 21. The upper surface of the aforementioned male template 5 is provided with at least two grooves spaced apart. A stop block 24 is embedded in each groove. A vertically arranged return needle 22 is connected to the central area of ​​the lower surface of each stop block 24. The lower end of the return needle 22, which slides with the male template 5, is fixedly connected to the ejector plate. A return needle spring 23 is provided on the outside of the return needle 22 and located between the ejector plate and the male template 5. The aforementioned male mold pad 14 is provided with a clearance through hole for the return needle spring 23 to pass through. The lower surface of the aforementioned male template 5 is provided with a groove for the upper end of the return needle spring 23 to be embedded. The aforementioned part 100 is a housing component for a smart device; The aforementioned male template 5 is equipped with an opening / closing device 3 that mates with an opening on the female template 1, for connecting the male template 5 and the female template 1; A heat insulation plate 19 is installed on the lower surface of the aforementioned rear mold fixing plate 18; At least two guide posts 26 are connected between the male template 5 and the female template 1. The upper end of the guide post 26, which is fixedly connected to the male template 5 at its lower end, is slidably engaged with the female template 1 through a guide sleeve 27. On the opposing surfaces of the aforementioned mold pad 14 and the bullet insertion spring plate, there is a limiting groove for the spring 12 to be inserted. The aforementioned bullet-entry ramp further includes an upper bullet-entry ramp 9 and a lower bullet-entry ramp 10, and the stacked upper bullet-entry ramp 9 and lower bullet-entry ramp 10 are fixedly connected by screws. The aforementioned upper bullet-jumping plate 9 is embedded in a groove on the lower surface of the male mold plate 5, and the aforementioned lower bullet-jumping plate 10 is embedded in a groove on the upper surface of the male mold pad 14. The upper surface of the male mold insert 6 is coplanar with the upper surface of the male mold core 4.

[0024] Working principle: During the mold opening process after the part is injection molded, the female mold plate drags the male mold plate upward synchronously through the damping force of the opening and closing device, so that the male mold plate and the male mold pad gradually separate. At this time, the insert plate with the male mold insert installed moves synchronously with the male mold plate under the action of the spring. The ejector pin installed on the rear mold fixing plate remains stationary, so that the molded part moves upward away from the ejector pin under the combined action of the male mold insert and the male and female mold cores to achieve relative movement and core pulling. It can also avoid the situation where the hollow column of the part becomes shorter or deformed due to excessive clamping force between the hollow column of the part and the ejector pin during the demolding process. Under the action of the height limiting screw and the mold base plate, the insert bullet jump plate and the mold insert can only move up the mold base plate by stroke D1 to make the hollow column part detach from the ejector pin, thus realizing the demolding of the upper inner wall of the hollow column. After the bullet springboard and the male mold insert stop moving, the male mold plate continues to move upward until the male mold plate moves upward relative to the male mold pad D2 and reaches the stop point of the male mold limiting structure, so that the male mold plate stops moving upward. During this process: the outer wall of the hollow column moves upward D2-D1 relative to the male mold insert which has completed its stroke and stopped moving. The female mold plate continues to move upward and separate from the male mold plate. The ejector plate with the ejector sleeve installed moves upward under the drive of the injection molding machine ejector rod, so that the ejector sleeve, which is in contact with the lower end face of the hollow column, pushes the part upward and separates it from the male mold core, further improving the dimensional accuracy of the hollow column after demolding.

[0025] Further explanation of the embodiments is as follows: This patent discloses a three-stage demolding technology for hollow column molds with a length greater than 32mm, which solves the problems of deformation and shortening of the length of long hollow columns during ejection. The technology divides the clamping force of the hollow column into three stages for demolding. Each stage of demolding requires overcoming a clamping force that is only one-third of that in the original sleeve structure, thereby achieving the required precision of the product. The upper and lower plates of the male mold and the male mold insert are connected by screws to form the pop-up insert assembly. The pop-up male mold plate and the equal height limit screw, the ejector pin part is fixed to the rear plate fixing plate, and the return pin stop block is connected to the upper and lower ejector pin plates to form the ejector pin assembly. The ejector pin is demolded from the product in the first stage by moving upward with the pop-up male mold plate. The pop-up insert assembly is placed below the male mold fixing plate. The upper and lower movement stroke of the pop-up insert assembly is limited by the height limit sleeve and the height limit screw. The pop-up male mold plate is located on the male mold pad plate and is demolded from the product in the second stage by sliding up and down with the male mold guide post installed on the male mold pad plate. The injection molding machine ejector rod acts on the lower ejector plate to apply force to the ejector assembly to complete the ejector pin ejection of the product in the third stage. It enables segmented ejection of products with long hollow columns, solves the problem of column deformation and shortening caused by excessive ejection force of the ejector pin, optimizes the mold structure, and completely solves the bottleneck problem in product development.

[0026] When using the above-mentioned processing method for the shell of intelligent devices, during the demolding process of injection molded parts with hollow cylinders, the parts are moved upwards and demolded in three sections. During the demolding process of the first two sections, the parts are covered in multiple directions. This avoids the situation where the hollow cylinder is shortened or deformed due to excessive clamping force between the hollow cylinder and the ejector pin, thereby improving the appearance accuracy and yield of the product.

[0027] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A method for processing a housing of a smart device, used for injection molding of a part (100), based on an injection mold, said injection mold comprising: A female mold plate (1) with a female mold core (2) installed, a male mold plate (5) with a male mold core (4) installed below the female mold plate (1), a rear mold fixing plate (18) below the male mold plate (5), and two mold feet (15) disposed between the male mold plate (5) and the rear mold fixing plate (18). The lower surface of each of the two mold feet (15) is connected to the upper surface of the rear mold fixing plate (18). A vertically movable ejector plate is horizontally disposed between the two mold feet (15) spaced apart. A cavity for molding the part (100) is formed between the female mold core (2) and the male mold core (4). The part (100) includes a body (101) and a hollow column (102) formed on the body (101). A male mold pad (14) is provided below the male mold template (5). The edges of the lower surface of the male mold pad (14) are connected to the upper surfaces of the two mold feet (15) respectively. An insert plate is provided between the male mold pad (14) and the male mold template (5). A male mold insert (6) corresponding to the hollow column (102) is installed on the insert plate. The upper part of the male mold insert (6) is embedded in the male mold core (4), and the lower end is connected to the ejector plate. The upper part of the ejector sleeve (7) is inserted into the through hole in the center of the male mold insert (6), and the upper part of the ejector pin (8) fixed on the rear mold fixing plate (18) is correspondingly embedded in the ejector sleeve (7), thereby forming a sub-cavity for molding a hollow column (102) between the male mold insert (6), the ejector sleeve (7), and the ejector pin (8). At least two springs (12) in a compressed state are provided between the male mold pad (14) and the insert bullet jump plate. An insert limiting structure is connected between the bullet insertion springboard and the male mold pad (14) or the rear mold fixing plate (18), so that the relative movement stroke between the bullet insertion springboard and the male mold pad (14) is D1. A male mold limiting structure is connected between the male mold template (5) and the male mold pad (14), so that the relative movement stroke between the male mold template (5) and the male mold pad (14) is D2 and D2 is greater than D1. D1 is less than the length of the hollow column (102) and D2 is greater than the length of the hollow column (102). The processing method includes the following steps: Step 1: After injection molding is completed, the female template (1) drags the male template (5) and moves upward together in the mold closing state by D1. During this process: the insert spring plate with the male mold insert (6) installed moves upward with the male template (5) under the action of the spring (12) and reaches the stop point of the insert limiting structure. The inner wall of the hollow column (102) moves upward relative to the fixed ejector pin (8) by D1. Step 2: The male template (5) continues to move upward until the male template (5) moves upward relative to the male mold pad (14) by D2 and reaches the stop point of the male mold limiting structure so that the male template (5) no longer moves upward. During this process: the male mold insert (6) that has stopped moving after the relative stroke of the outer wall of the hollow column (102) moves upward by D2-D1. Step 3: The female template (1) continues to move upward and separates from the male template (5). The ejector plate with the ejector sleeve (7) is driven upward by the ejector rod of the injection molding machine, so that the ejector sleeve (7) which is in contact with the lower end face of the hollow column (102) pushes the part (100) upward and separates it from the male mold core (4).

2. The processing method for the casing of a smart device according to claim 1, characterized in that: The part (100) has four hollow columns (102) formed on its body (101), and the hollow columns (102) are mounting columns.

3. The processing method for the casing of a smart device according to claim 1, characterized in that: The length of the hollow column (102) is greater than 32 mm.

4. The processing method for the casing of a smart device according to claim 1, characterized in that: The insert limiting structure includes: a plurality of height limiting screws (13) corresponding to the spring (12). The lower end of the height limiting screw (13) connected to the insert bullet jump plate passes through the male mold pad (14) and is embedded in the height limiting groove opened on the upper surface of the rear mold fixing plate (18). The lower end of the height limiting screw (13) has a flange portion (131) that extends radially outward. When the insert bullet jump plate and the male mold pad (14) are in a fitted state, there is a stroke gap D1 between the upper end face of the flange portion (131) and the lower surface of the male mold pad (14).

5. The processing method for the casing of a smart device according to claim 4, characterized in that: The height limiting screw (13) further includes a body and a limiting sleeve (11) fitted on the outside of the body. The spring (12) is fitted on the outside of the limiting sleeve (11). The flange (131) is disposed on the limiting sleeve (11). The limiting sleeve (11) is slidably engaged with the mold pad (14).

6. The method for processing the casing of a smart device according to claim 1, characterized in that: The male mold limiting structure includes: a male mold limiting screw (251) fixedly connected to the male mold pad (14) or the male mold template (5) at one end, and a male mold limiting sleeve (252) fitted on the outside of the male mold limiting screw (251). The other end of the male mold limiting screw (251) is embedded in a limiting groove opened on the male mold template (5) or the male mold pad (14). One end of the male mold limiting sleeve (252) located in the limiting groove has a limiting flange (253) extending radially outward. When the male mold pad (14) and the male mold template (5) are in a fitted state, there is a travel gap D2 between the limiting flange (253) and the inner wall of one end of the limiting groove.

7. The method for processing the casing of a smart device according to claim 6, characterized in that: The lower end of the male mold limiting screw (251) is fixedly connected to the male mold pad (14). The upper surface of the male mold template (5) is provided with the limiting groove. When the male mold pad (14) and the male mold template (5) are in a fitted state, the gap between the lower surface of the limiting flange (253) and the lower inner wall of the limiting groove is D2.

8. The method for processing the casing of a smart device according to claim 1, characterized in that: The ejector plate further includes an upper ejector plate (16) and a lower ejector plate (17). The stacked upper ejector plate (16) and lower ejector plate (17) are fixedly connected by screws, and the sleeve (7) is installed on the upper ejector plate (16).

9. The method for processing the casing of a smart device according to claim 1, characterized in that: At least two center supports (20) are connected between the rear mold fixing plate (18) and the male mold pad plate (14). The center supports (20) pass through the ejector plate and slide with the ejector plate through a center support sleeve (21).

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