Injection-molding apparatus for plastic casings

Abstract

The application discloses a kind of injection molding equipment of plastic shell, including processing table, injection device, first mould, second mould, support plate, multiple embedded components, multiple push components and ejection assembly, first mould and second mould are oppositely arranged above the processing table, and membrane cavity is equipped between first mould and second mould;Injection device is arranged on the sliding table of first sliding table module, the inner wall of second mould is equipped with multiple positioning columns, the sliding table of second sliding table module is equipped with connecting plate, multiple embedded components are arranged on the connecting plate, and multiple embedded components are connected by first transmission component between multiple embedded components, the upper surface of processing table is equipped with box, push component is arranged inside the box, and multiple push components are connected by second transmission component between multiple push components, ejection assembly is arranged outside second mould.

Description

Technical Field

[0001] This application relates to the technical field of plastic housing processing, and more particularly to an injection molding device for plastic housings. Background Technology

[0002] Injection molding equipment, also known as injection molding machine, is the main molding equipment that uses molds to make various shapes of plastic products from thermoplastic or thermosetting plastics.

[0003] During the processing of plastic housings, nuts need to be installed on the housings to facilitate assembly. Currently, there are two main methods for nut installation. The first is the hot-embedding method, where a nut hole is pre-drilled in the injection mold. After the housing is injection molded, the nut is manually preheated and quickly inserted into the nut hole to ensure full bonding with the plastic material. This method is cumbersome, slow, and the installation depth of the nut is difficult to control. The second method is integrated molding, where the nut is manually nested into one side of the injection mold, and then molten plastic is injected into the mold cavity. The molten plastic fills the entire interior of the mold, thus forming the nut and the plastic housing as a single unit. This method is faster than the first one.

[0004] However, manually nesting a single nut is inefficient, which affects subsequent injection molding work. In addition, because the nut is small, manual nesting can easily cause the nut to fall off, further reducing the efficiency of injection molding. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, one objective of this application is to provide an injection molding device for plastic housings that can simultaneously install multiple nuts on a second mold without them falling off, is easy to operate, and has a fast installation speed, thereby improving the injection molding efficiency of plastic housings.

[0007] To achieve the above objectives, a first aspect of this application provides an injection molding device for a plastic shell, comprising a processing table, an injection device, a first mold, a second mold, a support plate, multiple embedded components, multiple pushing components, and an ejection component. The first mold and the second mold are oppositely disposed above the processing table, and a cavity is provided between the first mold and the second mold. A first sliding table module is provided on the upper surface of the processing table, and the injection device is disposed on the sliding table of the first sliding table module and connected to the first mold. The injection device is used to fill the cavity with molten plastic. Multiple positioning posts are provided on the inner wall of the second mold, and a driving component is provided on the outer wall of the second mold. The support plate is installed on the upper surface of the processing table, and a second slide module is provided on the horizontal plate of the support plate. A connecting plate is provided on the slide of the second slide module. Multiple pre-embedded components are provided on the connecting plate, and the multiple pre-embedded components are connected to each other through a first transmission component. The pre-embedded components are used to nest the nut on the corresponding positioning post. A box is provided on the upper surface of the processing table. The pushing component is located inside the box, and the multiple pushing components are connected to each other through a second transmission component. The pushing component is used to feed the nut. The ejection component is located on the outside of the second mold, and the ejection component is used to demold the formed shell.

[0008] The injection molding equipment for plastic housings according to the embodiments of this application can simultaneously install multiple nuts on the second mold, and they are not easy to fall off. It is convenient to operate and has a fast installation speed, thereby improving the injection molding efficiency of plastic housings.

[0009] In addition, the injection molding equipment for the plastic housing proposed in this application may also have the following additional technical features:

[0010] In one embodiment of this application, the pre-embedded component includes a screw, a push rod sleeve, a limiting cylinder, and a plurality of push rods. The connecting plate has a circular groove, and one end of the screw is rotatably connected to the bottom of the circular groove. The limiting cylinder is fixedly disposed on the side wall of the connecting plate and sleeved outside the screw. The push rod sleeve is slidably disposed inside the push rod sleeve and threadedly connected to the screw. The plurality of push rods are respectively disposed on the side of the push rod sleeve facing away from the circular groove.

[0011] In one embodiment of this application, the limiting cylinder is provided with a plurality of limiting grooves, and the outer wall of the push rod sleeve is provided with a plurality of limiting plates, and the plurality of limiting plates are slidably connected to the corresponding limiting grooves.

[0012] In one embodiment of this application, the first transmission assembly includes a plurality of first sprockets and a first toothed chain, wherein the plurality of first sprockets are respectively disposed on the corresponding screws, and the plurality of first sprockets are connected to each other by the first toothed chain.

[0013] In one embodiment of this application, the pushing assembly includes a ball screw, a ball slider, a U-shaped plate, two push plates, and a main shaft. The ball screw is rotatably disposed inside the housing; the ball slider is slidably disposed on the ball screw; the U-shaped plate is disposed on the ball slider; the two push plates are respectively disposed at both ends of the U-shaped plate, and the push plates are hinged to the U-shaped plate; one end of the main shaft is connected to the inner wall of the housing, and the other end of the main shaft passes through a through slot opened in the housing and extends to the outside of the housing.

[0014] In one embodiment of this application, the second transmission assembly includes a plurality of second sprockets and a second toothed chain, wherein the plurality of second sprockets are respectively disposed on the corresponding ball screws, and the plurality of second sprockets are connected to each other by the second toothed chain.

[0015] In one embodiment of this application, the ejection assembly includes a fixed plate and a plurality of ejector rods, wherein the fixed plate is disposed on the upper surface of the processing table; the plurality of ejector rods are disposed on the side of the fixed plate adjacent to the second mold, the second mold having a plurality of ejection holes through it, and the end of the ejector rod facing away from the fixed plate is placed inside the ejection hole.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of an injection molding equipment for a plastic housing according to an embodiment of this application;

[0019] Figure 2 This is a front view of an injection molding apparatus for a plastic housing according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the positioning column in an injection molding machine for a plastic housing according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the structure of a pre-embedded component in an injection molding machine for a plastic housing according to an embodiment of this application;

[0022] Figure 5 for Figure 4 Enlarged structural diagram of area A in the middle;

[0023] Figure 6 This is a schematic diagram of the push assembly in an injection molding machine for a plastic housing according to an embodiment of this application.

[0024] As shown in the figure: 1. Processing table; 2. Injection device; 3. First mold; 4. Second mold; 5. Support plate; 6. Embedded component; 7. Pushing component; 8. Ejection component; 9. First transmission component; 10. First slide module; 11. Second slide module; 12. Connecting plate; 13. Positioning pin; 14. Box body; 15. Second transmission component; 16. Driving component; 17. Limiting plate; 18. Outlet groove; 40. Ejection hole; 61. Screw; 62. Push rod sleeve; 63. Limiting cylinder; 64. Push rod; 120. Circular groove; 121. Square annular groove; 630. Limiting groove; 70. Ball screw; 71. Ball slider; 72. U-shaped plate; 73. Push plate; 74. Main shaft; 80. Fixing plate; 81. Ejector rod; 90. First sprocket; 91. First toothed chain; 150. Second sprocket; 151. Second toothed chain. Detailed Implementation

[0025] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0026] The following description, in conjunction with the accompanying drawings, describes an injection molding apparatus for a plastic housing according to an embodiment of this application.

[0027] like Figures 1 to 6 As shown, the injection molding equipment for the plastic shell in this application embodiment may include a processing table 1, an injection device 2, a first mold 3, a second mold 4, a support plate 5, multiple embedded components 6, multiple pushing components 7, and an ejection component 8.

[0028] The first mold 3 and the second mold 4 are arranged opposite each other above the processing table 1, and a film cavity is provided between the first mold 3 and the second mold 4. The upper surface of the processing table 1 is provided with a first slide module 10, and the injection device 2 is arranged on the slide of the first slide module 10. The injection device 2 is connected to the first mold 3. The injection device 2 is used to fill the film cavity with plastic melt.

[0029] It should be noted that the injection device 2 described in this embodiment includes a drying cylinder, a material tube, and a heating mechanism. The drying cylinder can dry the plastic granules and send the dried plastic granules into the inside of the material tube. The plastic granules are heated and melted inside the material tube, and the plastic melt is sent into the cavity of the film after the film is closed by the screw inside the material tube. After cooling and shaping, it is demolded to obtain a plastic shell.

[0030] The inner wall of the second mold 4 is provided with multiple positioning posts 13, and the outer wall of the second mold 4 is provided with a driving component 16, which is installed on the upper surface of the processing table 1.

[0031] It should be noted that the driving component 16 described in this embodiment can be a hydraulic rod. The second mold 4 can be moved by the driving component 16 to facilitate demolding of the plastic shell. The number of positioning pins 13 is the same as the number of pre-installed nuts, and the nuts are positioned.

[0032] The support plate 5 is set on the upper surface of the processing table 1, and the second slide module 11 is provided on the horizontal plate of the support plate 5. The slide of the second slide module 11 is provided with a connecting plate 12. Multiple pre-embedded components 6 are set on the connecting plate 12, and the multiple pre-embedded components 6 are connected to each other through the first transmission component 9. The pre-embedded components 6 are used to nest the nut on the corresponding positioning post 13.

[0033] It should be noted that the pre-embedded component 6 described in this embodiment is set on the side of the connecting plate 12 adjacent to the second mold 4, and the pre-embedded component 6 is respectively set with the positioning post 13 so as to nest the nut on the corresponding positioning post 13.

[0034] The upper surface of the processing table 1 is provided with a box 14, and the push assembly 7 is located inside the box 14. Multiple push assemblies 7 are connected to each other through a second transmission assembly 15. The push assembly 7 is used to feed nuts.

[0035] In the embodiments of this application, the nut can be pushed onto the pre-embedded component 6 by the pushing component 7, and the nut can be nested on the positioning post 13 by the pre-embedded component 6, thereby facilitating and quickly installing multiple nuts inside the second mold 4.

[0036] Ejection assembly 8 is located on the outside of the second mold 4, and is used to demold the formed shell.

[0037] In the embodiments of this application, after the plastic shell is formed, the second mold 4 can be driven to separate from the first mold 3 by the drive component 16. At the same time, during the movement of the second mold 4, the ejection component 8 can eject the plastic shell attached to the second mold 4, realizing rapid demolding. There is no need for manual or robotic arms to demold it, making the operation more convenient and the cost lower.

[0038] Furthermore, in order to facilitate the sliding of the plastic shell after unloading, an outlet groove 18 is provided on the upper surface of the processing table 1. The bottom of the outlet groove 18 is a sloping structure, and the outlet groove 18 is located between the first mold 3 and the second mold 4. After the ejector component 8 ejects the plastic shell, it will automatically fall into the interior of the outlet groove 18 and slide down along the sloping surface of the outlet groove 18, thereby achieving the purpose of exporting the plastic shell.

[0039] To further clarify the above embodiments, in one embodiment of this application, such as Figure 4 As shown, the pre-embedded component 6 may include a screw 61, a push rod sleeve 62, a limiting cylinder 63, and multiple push rods 64. The connecting plate 12 is provided with a circular groove 120. One end of the screw 61 is rotatably connected to the bottom of the circular groove 120. The limiting cylinder 63 is fixedly disposed on the side wall of the connecting plate 12 and is sleeved on the outside of the screw 61. The push rod sleeve 62 is slidably disposed inside the push rod sleeve 62 and is threadedly connected to the screw 61. Multiple push rods 64 are respectively disposed on the side of the push rod sleeve 62 facing away from the circular groove 120.

[0040] It should be noted that, in this embodiment, the length of the screw 61 is greater than the length of the limiting cylinder 63. The nut is mounted on the screw 61. The screw 61, the push rod sleeve 62, and the limiting cylinder 63 are coaxially arranged. The push rod sleeve 62 is fitted onto the screw 61, and the limiting cylinder 63 is fitted onto the push rod sleeve 62. The limiting cylinder 63 restricts the push rod sleeve 62. When the screw 61 is driven to rotate, it can drive the push rod sleeve 62 to move linearly along the axis of the screw 61, and push the nut on the screw 61 onto the positioning post 13 through the push rod 64, so as to realize the pre-embedding of the nut.

[0041] Furthermore, one of the screws 61 is connected to an external drive mechanism, which can be a motor that can drive the screw 61 to rotate.

[0042] Furthermore, such as Figure 4 and Figure 5 As shown, the limiting cylinder 63 has multiple limiting grooves 630, and the outer wall of the push rod sleeve 62 has multiple limiting plates 17, which are slidably connected to the corresponding limiting grooves 630.

[0043] In the embodiments of this application, the movement direction of the push rod sleeve 62 can be restricted by the cooperation between the limiting plate 17 and the limiting groove 630, so that the push rod sleeve 62 can move in a straight line.

[0044] In one embodiment of this application, such as Figure 5As shown, the first transmission assembly 9 may include a plurality of first sprockets 90 and a first toothed chain 91, wherein the plurality of first sprockets 90 are respectively disposed on the corresponding screws 61, and the plurality of first sprockets 90 are connected to each other by the first toothed chain 91.

[0045] It should be noted that each first sprocket 90 described in this embodiment is meshed with a first toothed chain 91. Through the cooperation between multiple first sprockets 90 and first toothed chains 91, multiple screws 61 can be driven to rotate synchronously without the need for multiple drive mechanisms, thereby reducing the cost of this application.

[0046] Further, see Appendix Figure 4 and attached Figure 5 The first sprocket 90 is placed in the circular groove 120, and the side wall of the connecting plate 12 is provided with a square annular groove 121, which is connected to the circular groove 120. The first toothed chain 91 is located in the square annular groove 121.

[0047] In one embodiment of this application, such as Figure 6 As shown, the pushing assembly 7 may include a ball screw 70, a ball slider 71, a U-shaped plate 72, two push plates 73, and a main shaft 74. The ball screw 70 is rotatably disposed inside the housing 14, the ball slider 71 is slidably disposed on the ball screw 70, the U-shaped plate 72 is disposed on the ball slider 71, the two push plates 73 are respectively disposed at both ends of the U-shaped plate 72, and the push plates 73 are hinged to the U-shaped plate 72. One end of the main shaft 74 is connected to the inner wall of the housing 14, and the other end of the main shaft 74 passes through the through slot opened in the housing 14 and extends to the outside of the housing 14.

[0048] It should be noted that the spindle 74 described in this embodiment is fitted with multiple nuts, and two push plates 73 are arranged opposite each other. The minimum distance between the two push plates 73 is less than the outer diameter of the nut and greater than the inner diameter of the nut. The nuts on the spindle 74 are pushed out by driving the push plates 73 to move.

[0049] Furthermore, the ball screw 70 described in this embodiment is connected to a drive mechanism, wherein the drive mechanism can be a stepper motor, which can control the rotation angle of the ball screw 70, thereby facilitating the control of the movement displacement of the push plate 73.

[0050] In the embodiments of this application, see the appendix. Figure 6 To ensure that the U-shaped plate 72 can move in a straight line, a limiting block is provided on the side wall of the U-shaped plate 72, and the limiting block is slidably connected to the side wall of the box 14.

[0051] Specifically, by driving the ball screw 70 to rotate, the ball slider 71 can be moved, and through the cooperation between the U-shaped plate 72 and the two push plates 73, the nut is pushed to move closer to the screw 61 and fixed displacement, thereby pushing the outermost nut of the main shaft 74 onto the screw 61, realizing the nut loading process.

[0052] Furthermore, such as Figure 6 As shown, the second transmission assembly 15 may include a plurality of second sprockets 150 and a second toothed chain 151, wherein the plurality of second sprockets 150 are respectively disposed on corresponding ball screws 70, and the plurality of second sprockets 150 are connected to each other by the second toothed chain 151.

[0053] In the embodiments of this application, the second sprocket 150 is meshed with the second toothed chain 151. Through the cooperation between the second sprocket 150 and the second toothed chain 151, multiple ball screws 70 can be driven to rotate synchronously, thereby synchronously pushing the nuts on multiple main shafts 74.

[0054] In one embodiment of this application, such as Figure 1 and Figure 3 As shown, the ejection assembly 8 may include a fixed plate 80 and a plurality of ejector rods 81. The fixed plate 80 is disposed on the upper surface of the processing table 1, and the plurality of ejector rods 81 are disposed on the side of the fixed plate 80 adjacent to the second mold 4. The second mold 4 is provided with a plurality of ejection holes 40, and the end of the ejector rod 81 facing away from the fixed plate 80 is placed inside the ejection hole 40.

[0055] It should be noted that when the first mold 3 and the second mold 4 are in the closed state, the ejector rod 81 passes through the ejection hole 40, and the end of the ejector rod 81 is flush with the inner wall of the second mold 4. When the second mold 4 is controlled to move away from the first mold 3, the plastic shell attached to the second mold 4 can be ejected by the ejector rod 81, which facilitates the quick demolding of the plastic shell.

[0056] Specifically, during the plastic shell processing, the first mold 3 and the second mold 4 are in a closed state (the first mold 3 and the second mold 4 are tightly fitted together). Then, the molten plastic melt is injected into the membrane cavity (the cavity between the first mold 3 and the second mold 4) through the injection device 2. Under pressure, the melt flows in the membrane cavity to form the preset plastic shell structure.

[0057] After the plastic shell cools and sets, the relevant personnel control the drive component 16 to start. The drive component 16 drives the second mold 4 to move away from the first mold 3. The second mold 4 separates from the first mold 3, and the formed plastic shell will be attached to the second mold 4. At the same time, during the movement of the second mold 4, the ejector rod 81 passes through the ejection hole 40 and ejects the plastic shell attached to the second mold 4.

[0058] Then, the relevant personnel control the second slide module 11 to move, thereby moving the connecting plate 12 and the pre-embedded component 6 to the gap between the first mold 3 and the second mold 4. At this time, multiple pre-embedded components 6 are respectively set opposite to the corresponding positioning posts 13. Then, the relevant personnel control one of the screws 61 to rotate, and through the mutual cooperation between the first sprocket 90 and the first toothed chain 91, drive the other screws 61 to rotate. During the rotation of the screw 61, it drives the push rod sleeve 62 and the push rod 64 to move closer to the positioning post 13, so as to push the nut on the screw 61 onto the positioning post 13, thereby quickly putting the nut on the positioning post 13. Compared with manual installation of the nut, it is faster and more convenient, and the nut is not easy to fall off.

[0059] After the nut is installed, the relevant personnel control the connecting plate 12 to move out of the gap between the first mold 3 and the second mold 4 through the second slide module 11 until the pre-embedded component 6 and the pushing component 7 are set opposite each other. At this time, the screw 61 and the main shaft 74 are on the same axis. Then the relevant personnel can control the first mold 3 and the second mold 4 to close and fill the interior of the membrane cavity with plastic colloid.

[0060] At the same time, relevant personnel control the ball screw 70 to rotate, thereby driving the U-shaped plate 72 and push plate 73 to move closer to the screw 61, so as to push multiple nuts toward the screw 61 until the outermost nut is fitted onto the screw 61, thus completing the nut loading work.

[0061] In summary, the injection molding equipment for plastic housings in this application embodiment can simultaneously mount multiple nuts onto the positioning post through multiple pre-embedded components, making them less likely to fall off. It is convenient to operate and has a fast installation speed, thereby improving the injection molding efficiency of plastic housings.

[0062] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An injection molding machine for a plastic housing, characterized in that, It includes a processing table, injection unit, first mold, second mold, support plate, multiple embedded components, multiple pushing components, and ejection components, among which, The first mold and the second mold are arranged opposite each other above the processing table, and a membrane cavity is provided between the first mold and the second mold; The upper surface of the processing table is provided with a first slide module, the injection device is disposed on the slide of the first slide module, and the injection device is connected to the first mold, wherein the injection device is used to fill the mold cavity with plastic melt; The inner wall of the second mold is provided with multiple positioning posts, and the outer wall of the second mold is provided with a driving component, which is installed on the upper surface of the processing table. The support plate is disposed on the upper surface of the processing table, and a second slide module is provided on the horizontal plate of the support plate. A connecting plate is provided on the slide of the second slide module. Multiple embedded components are disposed on the connecting plate, and the multiple embedded components are connected to each other through a first transmission component. The embedded components are used to nest the nut on the corresponding positioning post. The pre-embedded component includes a screw, a push rod sleeve, a limiting cylinder, and multiple push rods. The connecting plate has a circular groove, and one end of the screw is rotatably connected to the bottom of the groove. The limiting cylinder is fixedly mounted on the side wall of the connecting plate and sleeved outside the screw. The push rod sleeve is slidably mounted inside the push rod sleeve and threadedly connected to the screw. Multiple push rods are respectively disposed on the side of the push rod sleeve facing away from the circular groove. The first transmission assembly includes a plurality of first sprockets and a first toothed chain, wherein the plurality of first sprockets are respectively disposed on the corresponding screws, and the plurality of first sprockets are connected to each other through the first toothed chain; The upper surface of the processing table is provided with a box, the pushing component is disposed inside the box, and multiple pushing components are connected to each other through a second transmission component, wherein the pushing component is used to feed the nut; The second transmission assembly includes a plurality of second sprockets and a second toothed chain, wherein the plurality of second sprockets are respectively mounted on corresponding ball screws, and the plurality of second sprockets are connected to each other via the second toothed chain. The ejector assembly is located on the outside of the second mold, and the ejector assembly is used to demold the formed shell.

2. The injection molding equipment for plastic housings according to claim 1, characterized in that, The limiting cylinder has multiple limiting grooves, and the outer wall of the push rod sleeve has multiple limiting plates, with each limiting plate slidably connected to a corresponding limiting groove.

3. The injection molding equipment for plastic housings according to claim 2, characterized in that, The pushing assembly includes a ball screw, a ball slider, a U-shaped plate, two push plates, and a main shaft, wherein... The ball screw is rotatably disposed inside the housing; The ball slider is slidably mounted on the ball screw; The U-shaped plate is disposed on the ball slider; The two push plates are respectively disposed at both ends of the U-shaped plate, and the push plates are hinged to the U-shaped plate; One end of the main shaft is connected to the inner wall of the housing, and the other end of the main shaft passes through the through slot opened in the housing and extends to the outside of the housing.

4. The injection molding equipment for the plastic housing according to claim 3, characterized in that, The ejection assembly includes a fixed plate and multiple ejector rods, wherein... The fixing plate is disposed on the upper surface of the processing table; Multiple ejector rods are disposed on one side of the fixed plate adjacent to the second mold. The second mold has multiple ejection holes through it, and the end of the ejector rod facing away from the fixed plate is placed inside the ejection hole.

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