High-speed molding production device for earphone shell production

Abstract

The high-speed molding production device for earphone shell production comprises a frame body, the upper end of the middle of the frame body is rotationally connected with a hollow rotary injection molding column, and a driving motor is arranged in the frame body to drive the frame body to rotate. A plurality of vertical rotating mold strips are arranged on the outer side of the rotating injection molding column, and a plurality of earphone head male molds are arranged on the outer side of each vertical rotating mold strip. A plurality of hollow push strips corresponding to the mold strips are arranged in the column, the push strips are communicated with a plurality of sliding gas injection pipes extending into the earphone head male mold, and gas injection holes are formed in the side walls of the gas injection pipes. The frame body is provided with a sliding frame on one side of the rotary injection molding column and driven by a hydraulic driving cylinder, the upper end of the sliding frame is provided with an injection molding unit, one end is provided with a displacement mold strip matched with a rotary mold strip, and the inner side of the strip is provided with a plurality of earphone head female molds matched with male molds and communicated with the injection molding unit. The frame body is upwards and movably provided with opening and closing mold strips on one side of the rotary injection molding column, the inner side of the frame body is provided with a plurality of earphone tail concave molds corresponding to the convex molds, and the opening and closing mold strips are vertically separated in half. The earphone shell is generated by combining injection molding and blow molding processes, demolding is easy, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of earphone part processing, and relates to a high-speed mold forming production device for earphone shell production. BACKGROUND

[0002] Under the background of rapid development of consumer electronics, as an important audio output terminal of human-computer interaction, the market demand of earphones continues to grow, and higher requirements are put forward for product appearance, wearing comfort and manufacturing precision. The earphone shell, as a core structural component of the earphone, not only bears the function of accommodating internal acoustic elements and circuit modules, but also needs to consider ergonomic design and aesthetic expression, so its manufacturing process directly affects the overall performance and user experience of the product.

[0003] At present, the mainstream manufacturing method of earphone shells is plastic injection molding technology. This process has the advantages of high production efficiency, good size consistency and suitability for mass production, and is widely used in the production of various small and precise electronic housings. However, with the earphone design becoming more compact and shaped, especially the in-ear or semi-in-ear earphones commonly adopt the structure of "big head and small tail" with a certain bending angle at the tail to adapt to the ear canal shape and improve the wearing stability. Such complex geometry brings significant challenges to the design of traditional injection molds.

[0004] Specifically, due to the narrowness and spatial curvature of the tail of the earphone shell, conventional two-plate or three-plate molds cannot achieve smooth demolding, often requiring the introduction of sliders, inclined pins or complex core-pulling mechanisms, resulting in complex mold structure, high cost, and prone to filling defects, shrinkage, warping and other molding defects. In addition, in order to improve production efficiency, multiple earphone shells are usually connected together through a runner system for batch molding during actual injection molding. After injection molding, plastic runners or connecting ribs are left between the earphone shells, which need to be trimmed and separated by manual or subsequent mechanical methods. This post-processing process not only increases labor costs, but also may cause shell damage due to improper operation, affecting product yield, and restricting the improvement of overall automation level and production efficiency. SUMMARY

[0005] The purpose of the present application is to provide a high-speed mold forming production device for earphone shell production, which combines injection molding and blow molding processes to produce earphone shells, making demolding simpler, and the earphone shells are independent and not connected together after production, without the need for subsequent trimming, which helps to improve production efficiency.

[0006] To solve the above technical problems, the application provides a high-speed mold forming production device for earphone shell production, which comprises a frame body, a hollow rotating injection column is rotatably connected to the upper end of the middle part of the frame body, a driving motor for driving the rotating injection column to rotate is installed in the frame body, a plurality of vertically arranged rotating mold strips are arranged on the outer side of the rotating injection column, a plurality of earphone head male molds distributed along the height direction of each rotating mold strip are arranged on the outer side of each rotating mold strip;

[0007] A retractable sliding hole extending into the rotating injection column is formed in each earphone head male mold, a plurality of hollow push strips corresponding to the rotating mold strips are movably arranged in the rotating injection column, each hollow push strip is communicated with a plurality of sliding gas injection pipes corresponding to the corresponding retractable sliding hole, a plurality of gas injection holes are formed in the side wall of each sliding gas injection pipe, and a high-pressure gas pump communicated with each hollow push strip is installed on the frame body;

[0008] A sliding frame is slidably connected to one side of the rotating injection column, a hydraulic drive cylinder for driving the sliding frame to slide is installed on the frame body, an injection unit is installed on the upper end of the sliding frame, a displacement mold strip matched with the rotating mold strip is arranged on one end of the sliding frame facing the rotating injection column, a plurality of earphone head female molds matched with the earphone head male molds and communicated with the outlet end of the injection unit are arranged on the inner side of the displacement mold strip;

[0009] A mold opening and closing strip is movably arranged on one side of the rotating injection column, a plurality of earphone tail female molds corresponding to the earphone head male molds are arranged on the inner side of the mold opening and closing strip, the mold opening and closing strip is vertically divided into two symmetrical halves, and a driving mechanism for driving the mold opening and closing strip to open and close is installed on the frame body.

[0010] Through the above technical scheme, when the work starts, the driving motor drives the rotating injection column to intermittently rotate by 90 degrees, so that the rotating mold strips are sequentially rotated to the appropriate positions. The hydraulic drive cylinder pushes the sliding frame to slide towards the rotating injection column, so that the displacement mold strip is close to the rotating mold strip, and the earphone head male mold is matched with the earphone head female mold.

[0011] The injection unit extrudes the plastic melt into the earphone head female mold to perform injection molding of the earphone shell head, and forms the blank of the earphone shell head and the earphone tail. After completion, the hydraulic drive cylinder is shortened to drive the sliding frame to reset, so that the displacement mold strip is separated from the rotating mold strip, the semi-finished earphone shell is separated from the earphone head male mold, and is left on the earphone head female mold of the displacement mold strip, and the driving motor drives the rotating injection column to rotate by 90 degrees again, so that the rotating mold strip is opposite to the mold opening and closing strip.

[0012] The driving mechanism drives the opening and closing mold strip to tightly close and cooperate with the earphone head cavity die on the displacement mold strip, the sliding injection pipe is extended out of the injection hole, the high-pressure air pump injects air into the blank body at the tail of the earphone through the sliding injection pipe, and the blank body at the tail of the earphone is expanded to form a complete earphone shell tail.

[0013] After blow molding is completed, the driving mechanism drives the two halves of the opening and closing mold strip to open, and the sliding injection pipe continues to push forward, so that the entire earphone shell is pushed out of the earphone head cavity die, and the production process of one earphone shell is completed, and then the rotating injection column continues to rotate to produce the next earphone shell.

[0014] The rotating injection column is further provided with a limiting sliding groove for sliding of the corresponding hollow push strip at each rotating mold strip, and the middle part of the rotating injection column is provided with an installation support column, and a hydraulic telescopic push rod is installed between each hollow push strip and the corresponding installation support column.

[0015] The rotating injection column is further provided with a limiting sliding groove for sliding of the corresponding hollow push strip at each rotating mold strip, and the middle part of the rotating injection column is provided with an installation support column, and a hydraulic telescopic push rod is installed between each hollow push strip and the corresponding installation support column.

[0016] The lower end of the sliding frame is provided with a horizontal sliding strip arranged along the length direction thereof, the frame body is provided with a horizontal sliding rail in sliding connection with the horizontal sliding strip, a support frame is arranged on the sliding frame, and the hydraulic drive cylinder is horizontally connected between the frame body and the support frame.

[0017] The injection unit comprises a melting cylinder which is installed on the sliding frame and horizontally arranged, one end of the melting cylinder towards the displacement mold strip is a tapered end, the displacement mold strip is provided with a strip-shaped injection channel in communication with each earphone head cavity die, and the tapered end of the melting cylinder is in communication with the strip-shaped injection channel.

[0018] The melting cylinder is communicated with a feeding hopper at one end away from the conical end, and is provided with an expansion sliding hole at one end away from the injection molding pipe, and a rotating shaft is rotatably connected in the melting cylinder, one end of the rotating shaft extends out of the expansion sliding hole and is in sealed sliding connection with the expansion sliding hole, a rotating motor for driving the rotating shaft is connected to one end of the rotating shaft extending out of the expansion sliding hole, and a hydraulic expansion cylinder is connected to one end of the rotating motor away from the rotating shaft.

[0019] The piston push block is slidingly connected to one end of the rotating shaft close to the conical end in the melting cylinder, and the rotating shaft is provided with spiral push blades on the outer periphery in the melting cylinder, a sliding hole is formed through the middle part of the piston push block, the inner diameter of the sliding hole is smaller than the outer diameter of the rotating shaft, one end of the rotating shaft is connected with a sliding connection shaft in sliding connection with the sliding hole, the length of the sliding connection shaft is longer than the length of the sliding hole, a flow guide hole is formed through the piston push block on the outer periphery of the sliding hole, and a push head is connected to the sliding connection shaft extending out of the sliding hole, the free end of the push head is a conical head matched with the conical end of the melting cylinder, the diameter of the rotating shaft satisfies the condition of being able to block all the flow guide holes, and the outer diameter of the push head satisfies the condition of not blocking the flow guide holes.

[0020] The present application further provides that the displacement mold strip is provided with a strip-shaped electric heating strip on both sides of the strip-shaped injection molding channel.

[0021] The present application further provides that the displacement mold strip is provided with a U-shaped water cooling channel on both sides of the earphone head concave die, and the displacement mold strip is provided with a water inlet joint and a water outlet joint respectively communicated with both ends of the U-shaped water cooling channel.

[0022] The present application further provides that each earphone head concave die is inwardly recessed to form an earphone tail blank die, and the sliding gas injection pipe can extend into the bottom of the earphone tail blank die.

[0023] The present application further provides that the frame body is provided with a vertical support strip on the side away from the rotating injection molding column of the opening and closing mold strip, the driving mechanism comprises a plurality of expansion driving cylinders mounted on the vertical support strip, the expansion shaft of each expansion driving cylinder is provided with a rotating connecting head facing the opening and closing mold strip, and the two halves of the opening and closing mold strip are rotatably connected with each rotating connecting head through a horizontal push-pull arm, a parallel connecting arm is rotatably connected between each half of the corresponding opening and closing mold strip and the vertical support strip on the outer side of each horizontal push-pull arm, and each parallel connecting arm is parallel to the corresponding horizontal push-pull arm.

[0024] The present application further provides that the frame body is provided with a blanking port between the opening and closing mold strip and the rotating injection molding column.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] Firstly, the present application realizes the efficient and accurate production of earphone shells by ingeniously combining injection molding and blow molding processes. During the injection molding stage, the plastic melt is accurately extruded into the earphone head cavity to form the preliminary shape of the earphone shell, including the blank of the head and the tail. In this process, the design of the melting cylinder is particularly critical. The electric heating ring on the outer periphery ensures uniform melting of the plastic, while the internal spiral pushing blade, driven by the rotating motor, stably pushes the melt to the conical end, and then through the strip-shaped injection channel into the earphone head cavity.

[0027] Secondly, in the blow molding stage, the extension of the sliding gas injection pipe and the cooperation of the high-pressure gas pump make the blank of the earphone tail expand under the action of gas pressure to form the complete tail of the earphone shell. This step not only solves the problem of difficult demolding in traditional injection molding process, but also avoids the subsequent trimming process, significantly improving the production efficiency and product yield.

[0028] Thirdly, the displacement mold strip and the opening and closing mold strip in the present application are also ingeniously designed. The strip-shaped electric heating strip in the displacement mold strip ensures temperature control during injection molding, while the U-shaped water cooling channel accelerates the cooling speed after molding, further improving the production efficiency. The two half design of the opening and closing mold strip, combined with the driving mechanism, realizes the rapid opening and closing of the mold, facilitating the removal of the earphone shell and the preparation for the next production. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present application;

[0030] Figure 2 for showing the connection between the display stand and the rotary injection molding column;

[0031] Figure 3 is a partial sectional view for showing the internal structure of the rotary injection molding column;

[0032] Figure 4 for showing the displacement mold strip and the injection molding unit on the sliding frame;

[0033] Figure 5 is a partial sectional view for showing the internal structure of the displacement mold strip;

[0034] Figure 6 is a partial sectional view for showing the internal structure of the injection molding unit;

[0035] Figure 7 for showing the connection between the opening and closing mold strip and the vertical support strip.

[0036] Wherein, 1, frame body; 2, rotating injection column; 3, drive motor; 4, rotating mold strip; 5, earphone head male die; 6, hollow push strip; 7, limit sliding groove; 8, mounting support column; 9, hydraulic telescopic push rod; 10, sliding air injection pipe; 11, air injection hole; 12, mounting frame; 13, high-pressure air pump; 14, high-pressure air pipe; 15, rotating joint; 16, hard air guide pipe; 17, electromagnetic valve; 18, sliding frame; 19, horizontal sliding strip; 20, horizontal sliding rail; 21, support frame; 22, hydraulic drive cylinder; 23, displacement mold strip; 24, earphone head female die; 25, earphone tail blank mold; 26, U-shaped water cooling channel; 27, water inlet connector; 28, water outlet connector; 29, melting cylinder; 30, strip-shaped injection channel; 31, strip-shaped electric heating strip; 32, feeding hopper; 33, rotating shaft; 34, rotating motor; 35, hydraulic telescopic cylinder; 36, electric heating ring; 37, piston push block; 38, spiral push vane; 39, sliding connection shaft; 40, flow guide hole; 41, push head; 42, vertical support strip; 43, mold opening and closing strip; 44, blanking port; 45, earphone tail female die; 46, telescopic drive cylinder; 47, rotating connector; 48, horizontal push-pull arm; 49, parallel connection arm. DETAILED DESCRIPTION

[0037] The high-speed mold forming production device for earphone shell production provided by the present application is further described in detail below in combination with the drawings and specific examples. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the drawings are all very simplified and use non-precise proportions, only for the purpose of facilitating and clarifying the description of the embodiments of the present application. The same or similar reference signs in the drawings represent the same or similar parts.

[0038] Embodiment, refer to Figures 1-7 A high-speed mold forming production device for earphone shell production, comprising a frame body 1, a vertically arranged and internally hollow rotating injection column 2 is rotatably connected to the upper end of the middle part of the frame body 1, the rotating injection column 2 is a quadrangular prism, a drive motor 3 for driving the rotating injection column 2 to rotate is installed in the frame body 1, the drive motor 3 is a step motor, used to drive the rotating injection column 2 to rotate intermittently by 90 degrees, a vertically arranged rotating mold strip 4 is arranged on each of the four outer sides of the rotating injection column 2, and fifteen earphone head male dies 5 distributed along the height direction are arranged on the outer side of each rotating mold strip 4.

[0039] A retractable sliding hole (not shown) is formed in each earphone head convex die 5 and extends into the rotary injection column 2. Four hollow push bars 6 corresponding to the rotary die strips 4 are movably arranged in the rotary injection column 2. A limiting sliding groove 7 for sliding the corresponding hollow push bar 6 is arranged on the inner wall of the rotary injection column 2 at each rotary die strip 4. A mounting support column 8 is arranged in the middle of the rotary injection column 2. Two hydraulic retractable push rods 9 are arranged between each hollow push bar 6 and the corresponding mounting support column 8. The hydraulic retractable push rod 9 can be extended to push the hollow push bar 6 to slide towards the rotary die strip 4.

[0040] Each hollow push bar 6 is connected with fifteen sliding gas injection pipes 10 corresponding to the retractable sliding hole. A plurality of gas injection holes 11 are formed in the side wall of each sliding gas injection pipe 10. When injection molding is performed, the gas injection holes 11 on the sliding gas injection pipe 10 do not leak out, preventing the plastic melt from entering the sliding gas injection pipe 10 through the gas injection holes 11. The frame body 1 is connected with a mounting frame 12 located above the rotary injection column 2. A high-pressure gas pump 13 is mounted on the upper end of the mounting frame 12. The outlet end of the high-pressure gas pump 13 is connected with a high-pressure gas pipe 14 that passes through the mounting frame 12 downward. The high-pressure gas pipe 14 is located on the rotary shaft 33 line of the rotary injection column 2. The lower end of the high-pressure gas pipe 14 is sealingly rotatably connected with a rotary joint 15. The upper end of each hollow push bar 6 is connected with a hard gas guide pipe 16 that passes through the upper end of the rotary injection column 2 upward. Each hard gas guide pipe 16 is connected with and communicates with the rotary joint 15. The rotary joint 15 is rotated by the hard gas guide pipe 16, so that the hard gas guide pipe 16 always communicates with the high-pressure gas pipe 14. An electromagnetic valve 17 is arranged on each hard gas guide pipe 16 to freely open or close the gas injection as needed.

[0041] The frame body 1 is slidably connected with a sliding frame 18 on the left and right sides of the rotary injection column 2. The lower end of each sliding frame 18 is provided with two horizontal sliding strips 19 arranged along the length direction. The left and right sides of the frame body 1 are provided with two horizontal sliding rails 20 slidably connected with the horizontal sliding strips 19. The front and rear sides of the sliding frame 18 are provided with a support frame 21. The frame body 1 and each support frame 21 are horizontally connected with a hydraulic drive cylinder 22 for driving the sliding frame 18 to slide.

[0042] Each sliding frame 18 is provided with a displacement mold strip 23 upwardly towards one end of the rotating injection column 2, which cooperates with the rotating mold strip 4. The inner side of the displacement mold strip 23 is provided with fifteen earphone head part concave molds 24 which are matched with the earphone head part convex molds 5 one by one. Each earphone head part concave mold 24 is inwardly recessed to form an earphone tail part blank mold 25. The sliding injection pipe 10 can extend into the bottom of the earphone tail part blank mold 25. The head part of the earphone shell is first injection molded, and an earphone tail part blank is pre-injection molded by the earphone tail part blank mold 25, which facilitates subsequent blow molding. The displacement mold strip 23 is provided with a U-shaped water cooling channel 26 located on both sides of the earphone head part concave mold 24. The upper end of the displacement mold strip 23 is provided with a water inlet connector 27 and a water outlet connector 28 which respectively communicate with both ends of the U-shaped water cooling channel 26. The U-shaped water cooling channel 26 is used for cooling the head part of the earphone shell, and does not cool the blank of the earphone tail part.

[0043] The upper end of the sliding frame 18 is provided with an injection unit, which includes a melting cylinder 29 installed on the sliding frame 18 and horizontally arranged. The end of the melting cylinder 29 towards the displacement mold strip 23 is a tapered end. The displacement mold strip 23 is provided with a strip-shaped injection channel 30 which communicates with each earphone head part concave mold 24. The tapered end of the melting cylinder 29 communicates with the strip-shaped injection channel 30. The displacement mold strip 23 is provided with a strip-shaped electric heating strip 31 on both sides of the strip-shaped injection channel 30, which prevents the plastic melt in the strip-shaped injection channel 30 from cooling and ensures the fluidity of the plastic melt.

[0044] The end of the melting cylinder 29 away from the tapered end is connected with a feeding hopper 32. The end of the melting cylinder 29 away from the injection pipe is provided with an expansion sliding hole (not shown). The melting cylinder 29 is rotatably connected with a rotating shaft 33. One end of the rotating shaft 33 extends out of the expansion sliding hole and is sealingly and slidingly connected therewith. The end of the rotating shaft 33 extending out of the expansion sliding hole is connected with a rotating motor 34 for driving the rotation of the rotating shaft 33. The sliding frame 18 is connected with a hydraulic expansion cylinder 35 at the end of the rotating motor 34 away from the rotating shaft 33. The outer periphery of the melting cylinder 29 is provided with a plurality of electric heating rings 36 arranged in the height direction thereof. The electric heating rings 36 are used for heating and melting the plastic particles in the melting cylinder 29.

[0045] A piston push block 37 is slidably connected to one end of the melt cylinder 29 near the conical end of the rotating shaft 33. A helical push blade 38 is arranged on the outer periphery of the rotating shaft 33 in the melt cylinder 29 to push the plastic forward. A sliding hole is formed through the middle of the piston push block 37, and the inner diameter of the sliding hole is smaller than the outer diameter of the rotating shaft 33. One end of the rotating shaft 33 is connected to a sliding connection shaft 39 that is slidably connected to the sliding hole. The length of the sliding connection shaft 39 is longer than the length of the sliding hole. A plurality of flow guide holes 40 are formed through the piston push block 37 on the outer periphery of the sliding hole. The sliding connection shaft 39 extends out of the sliding hole and is connected to a push head 41. The free end of the push head 41 is a conical head that matches the conical end of the melt cylinder 29. The diameter of the rotating shaft 33 is sufficient to block all the flow guide holes 40, and the outer diameter of the push head 41 is sufficient not to block the flow guide holes 40. When the rotating shaft 33 is pushed forward, the rotating shaft 33 can block the flow guide holes 40, and the plastic melt can be extruded through the piston push block 37. When the rotating shaft 33 is pulled backward, the flow guide holes 40 are not blocked, and the plastic melt can flow from the rear to the front of the melt cylinder 29 through the flow guide holes 40.

[0046] The frame body 1 is provided with a vertical support bar 42 upwardly on both sides of the rotary injection molding column 2. An open-close mold bar 43 is movably arranged on one side of each vertical support bar 42 facing the rotary injection molding column 2. The frame body 1 is provided with a material falling opening 44 between the open-close mold bar 43 and the rotary injection molding column 2, so that the earphone shell after production can finally fall out of the material falling opening 44. The inner side of the open-close mold bar 43 is provided with fifteen earphone tail concave molds 45 corresponding to the earphone head convex molds 5 one by one. The open-close mold bar 43 is vertically divided into two symmetrical halves, and each earphone tail concave mold 45 is cut into two halves. After the open-close mold bar 43 is separated to the two sides, the earphone shell can be released. The frame body 1 is provided with a driving mechanism for driving the open-close mold bar 43 to open and close.

[0047] The driving mechanism comprises three telescopic driving cylinders 46 mounted on the vertical support bars 42, each telescopic driving cylinder 46 is provided with a rotating connecting head 47 at the telescopic shaft thereof, each rotating connecting head 47 is rotatably connected with a horizontal push-pull arm 48 of one half of the opening and closing mold strip 43, each horizontal push-pull arm 48 is provided with a parallel connecting arm 49 rotatably connected between the corresponding half of the opening and closing mold strip 43 and the vertical support bar 42, and each parallel connecting arm 49 is parallel to the corresponding horizontal push-pull arm 48, so that the two halves of the opening and closing mold strip 43 can keep parallel when being opened and closed. When the telescopic driving cylinder 46 is shortened, the opening and closing mold strip 43 is pulled by the horizontal push-pull arm 48 to be tightly closed, cooperates with the earphone head concave mold 24 on the displacement mold strip 23, so that the earphone tail blank is inserted into the earphone tail concave mold 45, and the sliding gas injection pipe 10 is extended out of the gas injection hole 11, the electromagnetic valve 17 is opened to inject gas into the inside, so that the earphone tail blank is expanded to form a complete earphone shell tail, after the blow molding is completed, the telescopic driving cylinder 46 is elongated, the two halves of the opening and closing mold strip 43 are pulled open by the horizontal push-pull arm 48, and the sliding gas injection pipe 10 continues to push forward, so that the whole earphone shell is pushed out of the earphone head concave mold 24, and finally falls into the discharge port 44.

[0048] Working principle: when the work starts, the driving motor 3 drives the rotating injection column 2 to make intermittent rotation of 90 degrees, so that the rotating mold strip 4 is rotated to the appropriate position in turn. The hydraulic driving cylinder 22 pushes the sliding frame 18 to slide to the direction of the rotating injection column 2, so that the displacement mold strip 23 is close to the rotating mold strip 4, and the earphone head convex mold 5 cooperates with the earphone head concave mold 24.

[0049] The feeding hopper 32 sends the plastic particles into the melting cylinder 29 through the feeding pipe, the electric heating ring 36 heats and melts the plastic particles, the rotating motor 34 drives the rotating shaft 33 to rotate, the spiral pushing blade 38 pushes the plastic melt to move forward, when the rotating shaft 33 pushes to block the flow guide hole 40, the piston pushing block 37 extrudes the plastic melt into the earphone head concave mold 24 through the strip-shaped injection channel 30, so as to perform injection molding of the earphone shell head, and at the same time, the earphone tail blank is formed by pre-injection molding in the earphone tail blank mold 25. After the injection molding is completed, the U-shaped water cooling channel 26 cools the head of the earphone shell, without cooling the earphone tail blank.

[0050] After the completion, the hydraulic driving cylinder 22 is shortened to drive the sliding frame 18 to reset, so that the displacement mold strip 23 is separated from the rotating mold strip 4, the semi-finished earphone shell is separated from the earphone head convex mold 5, and is left on the earphone head concave mold 24 of the displacement mold strip 23, the driving motor 3 drives the rotating injection column 2 to rotate by 90 degrees again, so that the rotating mold strip 4 is opposite to the opening and closing mold strip 43.

[0051] The telescopic drive cylinder 46 is shortened, the open-close mold strip 43 is pulled tightly closed by the horizontal push-pull arm 48, the earphone tail blank is extended into the earphone tail cavity mold 45 by cooperating with the earphone head cavity mold 24 on the displacement mold strip 23, at this time the sliding gas injection pipe 10 is extended out of the gas injection hole 11, the electromagnetic valve 17 is opened, the high-pressure gas pump 13 injects gas into the sliding gas injection pipe 10 through the high-pressure gas pipe 14, the rotary joint 15 and the hard gas guide pipe 16, and the earphone tail blank is expanded to form a complete earphone shell tail.

[0052] After the blow molding is completed, the telescopic drive cylinder 46 is elongated, the two halves of the open-close mold strip 43 are pulled open by the horizontal push-pull arm 48, and the sliding gas injection pipe 10 continues to push forward, the entire earphone shell is pushed out of the earphone head cavity mold 24, and finally falls into the drop port 44, completing the production process of an earphone shell, and then the rotary injection column 2 continues to rotate to produce the next earphone shell.

[0053] It should be further supplemented that all the "provides" and similar descriptions in the present application (especially the specification) express that there is a connection relationship between two structures, but the specific connection means is not limited too much, and is usually a conventional connection means, that is, it should be understood that the means is prior art, and does not need to be described too much. For example, "m is provided with n", only expresses that m structure has n structure, and the specific connection between the two is through welding, riveting, adhesive connection or integral molding, which is within the protection scope of the present application; for example, "x is provided with y", only expresses that y and x can rotate relative to each other, and as for whether the two are connected through a bearing or y directly penetrates x to be connected with x in rotation, or other realizable modes, which are within the protection scope of the present application.

[0054] The above description is only a description of the preferred embodiments of the present application, and is not any limitation on the scope of the present application, any change and modification of the present application made by the person skilled in the art according to the above disclosure is within the protection scope of the claims.

Claims

1. A high-speed molding production device for producing headphone shells, comprising a frame (1), characterized in that, The upper part of the middle section of the frame is rotatably connected to a hollow rotating injection column (2). The frame is equipped with a drive motor (3) for driving the rotating injection column to rotate. Multiple vertically arranged rotating mold strips (4) are provided on the outside of the rotating injection column. Multiple earphone head punches (5) are provided on the outside of each rotating mold strip along its height direction. Each earphone head punch has a telescopic sliding hole that extends into the rotating injection column. Multiple hollow push rods (6) corresponding to the rotating mold strips are movably arranged inside the rotating injection column. Each hollow push rod is connected to multiple sliding air injection pipes (10) that extend into the corresponding telescopic sliding hole. Multiple air injection holes (11) are opened on the side wall of each sliding air injection pipe. A high-pressure air pump (13) connected to each hollow push rod is installed on the frame. The frame is slidably connected to a sliding frame (18) on one side of the rotating injection column. The frame is equipped with a hydraulic drive cylinder (22) for driving the sliding frame to slide. An injection unit is installed at the upper end of the sliding frame. A displacement mold strip (23) that cooperates with the rotating mold strip is provided at the end of the sliding frame facing the rotating injection column. Multiple earphone head cavities (24) that cooperate with the earphone head punches and communicate with the outlet end of the injection unit are provided on the inner side of the displacement mold strip. The frame is provided with an opening and closing mold strip (43) on one side of the rotating injection column. The inner side of the opening and closing mold strip is provided with a plurality of earphone tail concave molds (45) that correspond one-to-one with the earphone head punch. The opening and closing mold strip is vertically divided into two symmetrical halves. The frame is equipped with a drive mechanism for driving the opening and closing of the opening and closing mold strip.

2. The high-speed molding production device for producing headphone shells according to claim 1, characterized in that, The inner wall of the rotating injection column is provided with a limiting groove (7) for sliding the corresponding hollow push bar at each rotating mold bar. A mounting support column (8) is provided in the middle of the rotating injection column. A hydraulic telescopic push rod (9) is installed between each hollow push bar and the corresponding mounting support column.

3. The high-speed molding production device for producing headphone shells according to claim 2, characterized in that, The frame is connected to a mounting bracket (12) located above the rotating injection column. The high-pressure air pump is installed at the upper end of the mounting bracket. The outlet end of the high-pressure air pump is connected to a high-pressure air pipe (14) that passes downward through the mounting bracket. The high-pressure air pipe is located on the rotation axis of the rotating injection column. The lower end of the high-pressure air pipe is sealed and rotatably connected to a rotary joint (15). The upper end of each hollow push bar is connected to a rigid air guide pipe (16) that passes upward through the upper end of the rotating injection column. Each rigid air guide pipe is connected to and communicates with the rotary joint. Each rigid air guide pipe is equipped with a solenoid valve (17).

4. The high-speed molding production device for producing headphone shells according to claim 1, characterized in that, The lower end of the sliding frame is provided with a horizontal slide bar (19) arranged along its length direction, the frame body is provided with a horizontal slide rail (20) slidably connected to the horizontal slide bar, the sliding frame is provided with a support frame (21), and the hydraulic drive cylinder is horizontally connected between the frame body and the support frame.

5. The high-speed molding production apparatus for producing headphone shells according to claim 1, characterized in that, The injection molding unit includes a molten material cylinder (29) mounted on the sliding frame and arranged horizontally. One end of the molten material cylinder facing the displacement mold strip is tapered. The displacement mold strip is provided with a strip injection channel (30) that communicates with each headphone head cavity. The tapered end of the molten material cylinder is connected to the strip injection channel. The end of the molten material cylinder away from its conical end is connected to a feeding hopper (32). The end of the molten material cylinder away from the injection tube is provided with a telescopic sliding hole. A rotating shaft (33) is rotatably connected inside the molten material cylinder. One end of the rotating shaft extends out from the telescopic sliding hole and is slidably connected to it in a sealed manner. The end of the rotating shaft extending out from the telescopic sliding hole is connected to a rotating motor (34) for driving its rotation. The sliding frame is connected to a hydraulic telescopic cylinder (35) at the end of the rotating motor away from the rotating shaft. Multiple electric heating rings (36) are provided on the outer periphery of the molten material cylinder along its height direction. A piston pusher (37) is slidably connected to one end of the rotating shaft near its conical end inside the molten material cylinder. The rotating shaft is provided with a spiral pushing blade (38) on the outer periphery of the molten material cylinder. A sliding through hole is provided through the middle of the piston pusher. The inner diameter of the sliding through hole is smaller than the outer diameter of the rotating shaft. One end of the rotating shaft is connected to a sliding connecting shaft (39) that is slidably connected to the sliding through hole. The length of the sliding connecting shaft is longer than the length of the sliding through hole. A guide hole (40) is provided through the piston pusher on the outer periphery of the sliding through hole. A pusher head (41) is connected to the sliding connecting shaft extending out of the sliding through hole. The free end of the pusher head is a conical head that matches the conical end of the molten material cylinder. The diameter of the rotating shaft is sufficient to block all the guide holes, and the outer diameter of the pusher head is sufficient not to block the guide holes.

6. The high-speed molding production apparatus for producing headphone shells according to claim 5, characterized in that, The displacement mold strip is provided with strip-shaped electric heating strips (31) on both sides of the strip-shaped injection channel.

7. The high-speed molding production apparatus for producing headphone shells according to claim 5, characterized in that, The displacement mold strip is provided with U-shaped water-cooling channels (26) located on both sides of the head head concave mold. The upper end of the displacement mold strip is provided with a water inlet connector (27) and a water outlet connector (28) respectively connected to the two ends of the U-shaped water-cooling channels.

8. The high-speed molding production apparatus for producing headphone shells according to claim 1, characterized in that, Each headpiece head die is recessed inward to form a headpiece tail die (25), and the sliding air injection tube can extend into the bottom of the headpiece tail die.

9. A high-speed molding production apparatus for producing headphone shells according to claim 1, characterized in that, The frame is provided with a vertical support bar (42) on the side of the opening and closing mold bar away from the rotating injection column. The driving mechanism includes multiple telescopic drive cylinders (46) installed on the vertical support bar. The telescopic shaft of each telescopic drive cylinder is provided with a rotating connector (47) facing the opening and closing mold bar. Both halves of the opening and closing mold bar are rotatably connected to each rotating connector with a horizontal push-pull arm (48). On the outside of each horizontal push-pull arm, a parallel connecting arm (49) is provided rotatably connected between the corresponding half of the opening and closing mold bar and the vertical support bar. Each parallel connecting arm is parallel to the corresponding horizontal push-pull arm.

10. A high-speed molding production apparatus for producing headphone shells according to claim 1, characterized in that, The frame has a material discharge port (44) between the opening and closing mold strip and the rotating injection column.

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