Easy-to-demould shell forming device for earphone processing

Abstract

The invention relates to an injection molding device, in particular to a convenient-to-demould shell molding device for earphone processing. The invention discloses a shell forming device convenient to demould for earphone processing. The shell forming device comprises a support and the like. A lower die is slidably arranged on the lower portion of the support, positioning holes are formed in the four corners of the top of the lower die, the edges of the upper portions of the positioning holes are chamfered, air cylinders are symmetrically arranged on the upper portion of the support, the telescopic ends of the air cylinders face downwards, an upper die is connected between the telescopic ends of the air cylinders, positioning shafts are arranged at the four corners of the bottom of the upper die, and the bottom ends of the positioning shafts are semicircular. The upper die is in sliding connection with the support. The servo electric cylinder drives the transfer disc to move upwards, then the ejector rod and the cushion block are driven to move upwards, a shell subjected to injection molding can be quickly ejected out, and demolding work is completed; when upward force is applied to the bottom of the shell for demolding, the push plate applies demolding force to the shell from the side face, so that when the shell is demolded, stress is more uniform, and damage is avoided.

Description

Technical Field

[0001] The present invention relates to an injection molding device, and more particularly to a shell molding device for earphone processing that is convenient for demolding. Background Art

[0002] In the process of earphone production and manufacturing, shell molding is a crucial link. At present, common earphone shell molding processes mainly include injection molding, 3D printing, die casting molding, etc. Among them, injection molding has become the most widely used method due to its high efficiency, precision and suitability for large-scale production. However, regardless of the molding process used, the demolding process faces many challenges.

[0003] To improve the wearing comfort and aesthetic appearance of earphones, the design of earphone shells often pursues thinness and personalization, which makes the structure of the shell complex. For example, various ribs and snap structures may be provided inside, and streamline and irregular curved surfaces may be present outside, increasing the difficulty of demolding. On the other hand, with the increasing requirements for earphone sound quality, some high-end earphone shells use special materials such as high-strength plastics and composite materials, and the properties of these materials also bring new problems to demolding.

[0004] Due to the complex structure of the earphone shell, some parts of the shell are prone to adhesion to the mold during demolding, especially at structures with undercuts and side holes. If forced demolding is carried out, it is extremely easy to cause shell deformation, cracking or surface scratching, resulting in product scrapping and increasing production costs. Therefore, during the demolding process, if the demolding force is unevenly distributed, the various parts of the earphone shell will be subjected to inconsistent forces, resulting in defects such as warping deformation. This not only affects the appearance quality of the earphone, but may also cause the internal components of the earphone to be installed improperly, affecting the performance and service life of the earphone.

[0005] In summary, it is urgent to develop a shell molding device for earphone processing that is convenient for demolding to solve the above technical problems. Summary of the Invention

[0006] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a shell molding device for earphone processing that is convenient for demolding.

[0007] The technical solution of the present invention is: a shell forming device for earphone processing that is convenient for demolding, including a support, a lower mold, a cylinder, an upper mold, and an ejection assembly. The lower mold is slidably arranged at the lower part of the support, the cylinders are symmetrically arranged at the upper part of the support, the upper mold is connected between the telescopic ends of the cylinders, and the upper mold is slidably connected to the support. An ejection assembly is installed in the internal space formed by the lower mold and the support, and the upper surface of the ejection assembly is attached to the inner surface of the lower mold; the ejection assembly includes a track, a servo electric cylinder, a transfer disk, ejection rods, and a cushion block. The track is fixedly connected to the support below the lower mold by bolts, the servo electric cylinder is slidably connected in the track, the output shaft at the top of the servo electric cylinder is connected with the transfer disk, the ejection rods are evenly arranged at intervals on the top of the transfer disk, the top of the ejection rod is connected with the cushion block, and the upper surface of the cushion block is on the same arc plane as the inner surface of the lower mold.

[0008] Further, positioning holes are provided at the four corners of the top of the lower mold, the upper edges of the positioning holes are rounded, positioning shafts are provided at the four corners of the bottom of the upper mold, and the bottom ends of the positioning shafts are semi-circular.

[0009] Further, it further includes a mold release agent adding assembly. The mold release agent adding assembly is arranged on both the left and right sides of the lower mold. The mold release agent adding assembly includes a mounting seat, a storage cylinder, a spring I, a blanking pipe, a nozzle, and a wedge-shaped seat. The mounting seats are fixedly connected to both the left and right sides of the lower mold by bolts, the storage cylinders are slidably connected to the tops of the mounting seats, the spring I is connected between the storage cylinder and the mounting seat, the bottom of the storage cylinder is connected with a blanking pipe extending towards the lower mold, the end of the blanking pipe is connected with a nozzle with a valve, and a wedge-shaped seat is installed on the storage cylinder.

[0010] Further, the inclined surface of the wedge-shaped seat faces the upper mold, and initially, the upper mold and the wedge-shaped seat partially overlap in the vertical direction.

[0011] Further, it further includes a side upward ejection assembly. The side upward ejection assembly is installed on the support inside the lower mold. The side upward ejection assembly includes a concave block, an elastic telescopic rod, a sliding shaft, and a push plate. At least two concave blocks are evenly arranged at intervals in the circumferential direction of the transfer disk. Elastic telescopic rods are arranged on the inner side of the lower mold outside the concave blocks. The telescopic end of the elastic telescopic rod is installed with a sliding shaft, the sliding shaft is above the concave block, and the end of the elastic telescopic rod is connected with a push plate. The upper surface of the push plate is on the same arc plane as the inner surface of the lower mold.

[0012] Further, the elastic telescopic rod is inclined and installed on the inner side wall of the lower mold.

[0013] Further, it further includes a preheating assembly. The preheating assembly is installed on the side of the lower mold. The preheating assembly includes a sleeve, a temperature controller, and a heating pipe. The sleeve is installed on the side of the lower mold, the heating pipe is installed in the sleeve, and the temperature controller is installed on the heating pipe.

[0014] Further, it further includes a vibration assembly. The vibration assembly is installed on the support. The vibration assembly includes a vibrator and a second spring. The vibrator is fixedly installed at the rear side of the support, and a second spring is connected between the lower mold and the support.

[0015] 1. In the present invention, the servo electric cylinder drives the transfer disk to move upward, and then drives the ejector rod and the spacer to move upward, so that the injection-molded shell can be quickly ejected to complete the demolding work. When applying an upward force to the bottom of the shell for demolding, the push plate applies a demolding force to the shell from the side, so that when the shell is demolded, the force is more uniform and the shell will not be damaged.

[0016] 2. Under the action of the wedge-shaped seat, after the material storage cylinder and its upper components complete the addition of the mold release agent, they will automatically move outward, which will not affect the mold closing work. When the upper mold moves upward to reset, under the action of the first spring, it drives the material storage cylinder and its upper components to move inward to reset for the next addition of the mold release agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 is a three-dimensional structural schematic diagram of the upper components of the lower mold of the present invention.

[0019] Figure 3 is a three-dimensional structural schematic diagram of the interior of the lower mold of the present invention.

[0020] Figure 4 is a three-dimensional structural schematic diagram of the mold release agent adding assembly of the present invention.

[0021] Figure 5 is a three-dimensional structural schematic diagram of the ejecting assembly of the present invention.

[0022] Figure 6 is a three-dimensional structural schematic diagram of the upper-side ejecting assembly of the present invention.

[0023] Figure 7 is a top view of the vibration assembly of the present invention.

[0024] Figure 8 is a three-dimensional structural schematic diagram of the preheating assembly of the present invention.

[0025] Meanings of the reference numerals in the drawings: 1: support; 2: lower die; 201: positioning hole; 3: cylinder; 4: upper die; 401: positioning shaft; 5: ejecting assembly; 51: track; 52: servo electric cylinder; 53: adapter plate; 54: ejecting rod; 55: spacer block; 6: mold release agent adding assembly; 61: mounting seat; 62: storage cylinder; 63: spring I; 64: blanking pipe; 65: nozzle; 66: wedge-shaped seat; 7: side upward ejecting assembly; 71: concave block; 72: elastic telescopic rod; 73: sliding shaft; 74: push plate; 8: preheating assembly; 81: sleeve; 82: temperature controller; 83: heating pipe; 9: vibrating assembly; 91: vibrator; 92: spring II. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. It is hereby declared that the upper, lower, left, right, front, rear, inner, outer and other orientation terms that appear or will appear in the text of the present invention are only based on the drawings of the present invention and do not specifically limit the present invention.

[0027] Embodiment 1: An outer shell forming device for earphone processing that is easy to demold, as Figure 1 , Figure 2 , Figure 3 and Figure 5 shown, includes a support 1, a lower die 2, a cylinder 3, an upper die 4 and an ejecting assembly 5. The lower die 2 is slidably arranged below the support 1. Positioning holes 201 are opened at the four corners of the top of the lower die 2. The upper edges of the positioning holes 201 are rounded. Cylinders 3 are symmetrically arranged above the support 1. The telescopic ends of the cylinders 3 face downward. An upper die 4 is connected between the telescopic ends of the cylinders 3. Positioning shafts 401 are arranged at the four corners of the bottom of the upper die 4. The bottom ends of the positioning shafts 401 are semi-circular. The upper die 4 is slidably connected to the support 1. An ejecting assembly 5 is installed in the internal space formed by the lower die 2 and the support 1. The upper surface of the ejecting assembly 5 fits the inner surface of the lower die 2.

[0028] As Figure 3 and Figure 5 shown, the ejecting assembly 5 includes a track 51, a servo electric cylinder 52, an adapter plate 53, ejecting rods 54 and spacer blocks 55. The track 51 is fixedly connected to the support 1 below the lower die 2 by bolts. A servo electric cylinder 52 is slidably connected in the track 51. An adapter plate 53 is connected to the output shaft at the top of the servo electric cylinder 52. Ejecting rods 54 are evenly spaced on the top of the adapter plate 53. The top ends of the ejecting rods 54 are connected with spacer blocks 55. The upper surfaces of the spacer blocks 55 and the inner surface of the lower die 2 are on the same arc plane.

[0029] When the device is used for injection molding of the headphone housing, first connect the injection pipe with the upper mold 4. Then control the cylinder 3 to extend, driving the upper mold 4 to move downward for mold closing. During the process of mold closing between the upper mold 4 and the lower mold 2, since the bottom end of the positioning shaft 401 is semi-circular and the edge of the positioning hole 201 has a rounded corner, when there is a slight position deviation between the upper mold 4 and the lower mold 2, the upper mold 4 and the lower mold 2 will be automatically adjusted due to the action of the positioning shaft 401 and the positioning hole 201, so that the upper mold 4 and the lower mold 2 can perform mold closing more accurately. After the upper mold 4 and the lower mold 2 are closed, control the cylinder 3 to stop working. Then inject the material into the space between the upper mold 4 and the lower mold 2. After waiting for the material in the internal space to cool and solidify, control the cylinder 3 to shorten and reset, driving the upper mold 4 to move upward and reset. Then control the servo electric cylinder 52 to start working, driving the adapter plate 53 to move upward, and further driving the ejector rod 54 and the spacer block 55 to move upward to eject the injection-molded housing to complete the demolding work. Then control the servo electric cylinder 52 to drive the adapter plate 53 to move downward and reset.

[0030] Embodiment 2: On the basis of Embodiment 1, as Figure 4 shown, it further includes a release agent adding component 6. Release agent adding components 6 are arranged on both the left and right sides of the lower mold 2. The release agent adding component 6 includes a mounting seat 61, a storage cylinder 62, a spring I 63, a feed pipe 64, a nozzle 65 and a wedge-shaped seat 66. Mounting seats 61 are fixedly connected to both the left and right sides of the lower mold 2 by bolts. Storage cylinders 62 are slidably connected to the tops of the mounting seats 61. The storage cylinders 62 are used to store the release agent. A spring I 63 is connected between the storage cylinder 62 and the mounting seat 61. The bottom of the storage cylinder 62 is connected with a feed pipe 64 extending towards the lower mold 2. The end of the feed pipe 64 is connected with a nozzle 65. An electric valve is installed on the nozzle 65. A wedge-shaped seat 66 is installed on the storage cylinder 62. The inclined surface of the wedge-shaped seat 66 faces the upper mold 4. Initially, the upper mold 4 and the wedge-shaped seat 66 partially overlap in the vertical direction; before the upper mold 4 and the lower mold 2 are closed, control the electric valve on the feed pipe 64 to open, so that the release agent in the storage cylinder 62 enters the lower mold 2 through the feed pipe 64 and the nozzle 65. After the release agent is added, control the electric valve to close and stop adding the release agent. Then drive the upper mold 4 to move downward through the cylinder 3. During the process of the upper mold 4 moving downward, the bottom of the upper mold 4 contacts the inclined surface of the wedge-shaped seat 66, pushing the wedge-shaped seat 66 to move outward, so that the storage cylinder 62 and its components move outward, and the spring I 63 is compressed. In this way, after the storage cylinder 62 and its components complete the addition of the release agent, they will automatically move away outward and will not affect the mold closing work. When the upper mold 4 moves upward and resets, under the action of the spring I 63, drive the storage cylinder 62 and its components to move inward and reset for the next addition of the release agent.

[0031] As Figure 6As shown in the figure, it further includes a side upward pushing component 7. A side upward pushing component 7 is installed on the support 1 in the lower mold 2. The side upward pushing component 7 includes a concave block 71, an elastic telescopic rod 72, a sliding shaft 73 and a pushing plate 74. At least two concave blocks 71 are arranged at equal intervals in the circumferential direction of the transfer disk 53. Elastic telescopic rods 72 are inclinedly arranged on the inner side wall of the lower mold 2 outside the concave block 71. A sliding shaft 73 is installed at the telescopic end of the elastic telescopic rod 72. The sliding shaft 73 is above the concave block 71. The end of the elastic telescopic rod 72 is connected with a pushing plate 74. The upper surface of the pushing plate 74 and the inner surface of the lower mold 2 are on the same arc-shaped plane; when the transfer disk 53 moves upward to push out the injection-molded shell, it drives the concave block 71 to move upward. The upward movement of the concave block 71 drives the sliding shaft 73 to move upward, causing the elastic telescopic rod 72 to move obliquely upward and elongate, driving the pushing plate 74 to move upward for demolding. In this way, when applying an upward force to the bottom of the shell for demolding, the pushing plate 74 applies a demolding force to the shell from the side, making the shell more evenly stressed during demolding and not being damaged. When the transfer disk 53 moves downward to reset, the elastic telescopic rod 72 shortens downward to reset, driving the pushing plate 74 to reset.

[0032] As Figure 8 shown in the figure, it further includes a preheating component 8. The preheating component 8 is installed on the side of the lower mold 2. The preheating component 8 includes a sleeve 81, a temperature controller 82 and a heating tube 83. The sleeve 81 is installed on the side of the lower mold 2. The heating tube 83 is installed in the sleeve 81. The temperature controller 82 is installed on the heating tube 83; before injecting the earphone shell, after the lower mold 2 and the upper mold 4 are closed, the heating tube 83 can be controlled by the temperature controller 82 to heat, preheating the lower mold 2 and the upper mold 4. After the lower mold 2 and the upper mold 4 are preheated, the temperature controller 82 is used to control the heating tube 83 to stop working, and then the liquid is injected. In this way, it can prevent the liquid from rapidly cooling during injection due to the too low temperature of the lower mold 2 and the upper mold 4, affecting the injection quality of the shell.

[0033] As Figure 7 shown in the figure, it further includes a vibration component 9. The vibration component 9 is installed on the support 1. The vibration component 9 includes a vibrator 91 and a spring II 92. The vibrator 91 is fixedly installed at the rear side of the support 1 through bolts. A spring II 92 is connected between the lower mold 2 and the support 1; when demolding the injection-molded shell, the vibrator 91 is controlled to work. Under the action of the spring II 92 and the vibrator 91, the lower mold 2 vibrates continuously, enabling the formed shell to be better demolded. After the shell is demolded, the vibrator 91 is controlled to stop working.

[0034] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A shell molding device for earphone processing that is easy to demould, comprising a support (1), a lower mold (2), a cylinder (3), an upper mold (4) and an ejection assembly (5), wherein the lower mold (2) is slidably arranged at the lower part of the support (1), the cylinder (3) is symmetrically arranged at the upper part of the support (1), the upper mold (4) is connected between the telescopic ends of the cylinder (3), the upper mold (4) and the support (1) are slidably connected, and the ejection assembly (5) is installed in the internal space formed by the lower mold (2) and the support (1), and the upper surface of the ejection assembly (5) is in contact with the inner surface of the lower mold (2); wherein the ejection assembly (5) is characterized in that: The ejection assembly (5) comprises a track (51), a servo electric cylinder (52), an adapter plate (53), an ejection rod (54) and a cushion block (55); the track (51) is fixedly connected to a support (1) at the bottom of the lower mold (2) by bolts; the servo electric cylinder (52) is slidably connected in the track (51); the output shaft at the top of the servo electric cylinder (52) is connected to the adapter plate (53); the ejection rods (54) are evenly spaced on the top of the adapter plate (53); the top of the ejection rods (54) is connected to the cushion block (55); the upper surface of the cushion block (55) and the inner surface of the lower mold (2) are on the same arc-shaped plane.

2. A housing molding device for earphone processing that is easy to demould as claimed in claim 1, characterized in that: Positioning holes (201) are provided at the four corners of the top of the lower mold (2), and the upper edges of the positioning holes (201) are rounded. Positioning shafts (401) are provided at the four corners of the bottom of the upper mold (4), and the bottom ends of the positioning shafts (401) are semicircular.

3. A housing molding device for earphone processing that is easy to demould as claimed in claim 2, characterized in that: The mold release agent adding assembly (6) is also included. The mold release agent adding assembly (6) is arranged on both the left and right sides of the lower mold (2). The mold release agent adding assembly (6) includes a mounting seat (61), a storage barrel (62), a spring I (63), a feed pipe (64), a nozzle (65) and a wedge-shaped seat (66). The left and right sides of the lower mold (2) are fixedly connected to the mounting seat (61) by bolts. The top of the mounting seat (61) is slidably connected to the storage barrel (62). The storage barrel (62) and the mounting seat (61) are connected with a spring I (63). The bottom of the storage barrel (62) is connected to a feed pipe (64) extending toward the lower mold (2). The end of the feed pipe (64) is connected to a nozzle (65) with a valve. The storage barrel (62) is installed with a wedge-shaped seat (66).

4. A housing molding device for earphone processing that is easy to demould as claimed in claim 3, characterized in that: The inclined surface of the wedge-shaped seat (66) faces the upper die (4), and initially the upper die (4) and the wedge-shaped seat (66) partially overlap in the vertical direction.

5. The housing molding device for earphone processing that is easy to demould as claimed in claim 1, characterized in that: The invention also comprises a side top assembly (7), wherein the side top assembly (7) is mounted on a support (1) in the lower mold (2), and the side top assembly (7) comprises a concave block (71), an elastic telescopic rod (72), a sliding shaft (73) and a push plate (74). At least two concave blocks (71) are evenly spaced around the adapter plate (53), an elastic telescopic rod (72) is arranged on the inner side of the lower mold (2) outside the concave block (71), a sliding shaft (73) is mounted on the telescopic end of the elastic telescopic rod (72), and the sliding shaft (73) is above the concave block (71). The end of the elastic telescopic rod (72) is connected to a push plate (74), and the upper surface of the push plate (74) and the inner surface of the lower mold (2) are on the same arc-shaped plane.

6. The housing molding device for earphone processing that is easy to demould as claimed in claim 5, characterized in that: The elastic telescopic rod (72) is installed obliquely on the inner side wall of the lower mold (2).

7. The housing molding device for earphone processing that is easy to demould as claimed in claim 1, characterized in that: The invention also comprises a preheating assembly (8), wherein the preheating assembly (8) is installed on the side of the lower mold (2), the preheating assembly (8) comprises a sleeve (81), a temperature controller (82) and a heating tube (83), the sleeve (81) is installed on the side of the lower mold (2), the heating tube (83) is installed in the sleeve (81), and the heating tube (83) is installed on the temperature controller (82).

8. The housing molding device for earphone processing and easy demoulding as claimed in claim 1, characterized in that: The invention also comprises a vibration component (9), the vibration component (9) is installed on the support (1), the vibration component (9) comprises a vibrator (91) and a spring II (92), the vibrator (91) is fixedly installed on the rear side of the support (1), and the spring II (92) is connected between the lower mold (2) and the support (1).

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