A back shell pin needle feeding and water gap cutting integrated device and method

Abstract

This invention discloses an integrated device and method for PIN feeding and sprue removal of a back shell. The device includes a frame, an injection mold, a feeding mechanism, a picking mechanism, a transfer and positioning mechanism, a sprue removal mechanism, and a transfer mechanism. The transfer mechanism includes a PIN feeding unit and a back shell transfer unit, which are connected to a three-axis linear motion mechanism to achieve movement in the X, Y, and Z axes. The feeding mechanism arranges and feeds the PINs, the picking mechanism picks up and transfers the PINs, the transfer and positioning mechanism positions the PINs, and the transfer mechanism sends the PINs into the injection mold for insert injection molding. After mold opening, the back shell is transferred to the sprue removal mechanism for sprue removal and output as a finished product. This invention, through the coordinated design of the equipment structure and process steps, forms an integrated automated production solution for PIN feeding, positioning, insert injection molding, and sprue removal, reducing manual intervention, improving production efficiency, and enhancing the consistency of back shell product quality.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology for back shells, and in particular to an integrated device and method for feeding back shell pins and removing sprue marks. Background Technology

[0002] In the manufacturing process of electronic product back covers (such as mobile phone back covers, smart wearable device back covers, etc.), metal pins are usually embedded during injection molding to achieve conductivity or connection functions. In existing processes, the feeding of pins and the removal of sprue gates are usually separate processes, which suffer from low automation and low production efficiency.

[0003] Chinese patent application CN104044243A discloses an automatic feeding and cutting machine. This machine utilizes a vacuum suction cup, a motor-driven slide, and a cylinder to automatically position and cut inserts. It can automatically feed inserts into the injection mold and remove sprue marks after injection molding. This solution achieves a certain degree of automated production through the combination of an insert moving device, a positioning device, and a cutting device.

[0004] However, in the prior art, although pin feeding and sprue removal are performed in the same equipment, the process is still executed serially in segments, with limited cycle time utilization. The ability to accurately and synchronously feed pins is insufficient, making it difficult to ensure the consistency of multiple pin positions. The overall structure does not form a highly integrated solution for the back shell, pins, injection molding, and sprue removal. Therefore, this invention discloses an integrated equipment and method for back shell pin feeding and sprue removal to solve the above problems. Summary of the Invention

[0005] Based on this, it is necessary to provide an integrated equipment and method for PIN feeding and gate removal of the back shell to address the above-mentioned technical problems. Through the coordinated design of equipment structure and process steps, an integrated automatic production solution for PIN feeding, positioning, insert injection molding and gate removal is formed, thereby reducing manual intervention, improving production efficiency and enhancing the consistency of back shell product quality.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A device for feeding PIN pins and removing sprue marks in a rear shell, comprising a frame and an injection mold.

[0008] The feeding mechanism is used to feed multiple PIN pins in an orderly fashion.

[0009] The material handling mechanism, located at the discharge port of the feeding mechanism, is used to remove the arranged PIN pins;

[0010] A transfer and positioning mechanism for transferring and positioning PIN pins taken out from the picking mechanism;

[0011] A sprue removal mechanism is used to remove the sprue from the rear shell after mold opening.

[0012] The transfer mechanism includes a PIN needle transfer unit and a back shell transfer unit. The PIN needle transfer unit is used to adsorb the PIN needles in the transfer and positioning mechanism, and the back shell transfer unit is used to adsorb the back shell. The transfer mechanism is connected to a three-axis linear motion mechanism, which drives the transfer mechanism to move in the X, Y, and Z axis directions.

[0013] As a preferred embodiment of the integrated device for feeding and removing PIN pins on the back shell provided by the present invention, the feeding mechanism includes a stand, a guide chute and a first cylinder. The output end of the first cylinder is fixedly connected to a feeding bar. The feeding bar is slidably connected to the guide chute and a limiting pressure plate is fixedly connected to the guide chute. A first notch and a second notch are respectively provided on the same side of the feeding bar and the guide chute. The second notch is connected to the discharge port of the feeding mechanism. A detection sensor is fixed on the limiting pressure plate. The bottom of the limiting pressure plate and the first notch are both provided with through holes corresponding to the detection sensor.

[0014] As a preferred embodiment of the integrated device for feeding and removing PIN pins on the back shell provided by the present invention, the feeding mechanism further includes an X-axis linear guide module and a slide block. The slide block is slidably connected to the X-axis linear guide module. A second cylinder is fixed on the slide block. The second cylinder is provided with an adsorption structure. The adsorption structure is used to adsorb the PIN pins on the first notch.

[0015] As a preferred embodiment of the integrated device for feeding and removing PIN pins on the back shell provided by the present invention, the transfer positioning mechanism includes a Y-axis linear guide module and a transfer frame. The transfer frame is slidably connected to the Y-axis linear guide module. The top of the transfer frame is provided with a positioning groove for positioning and placing PIN pins. The transfer frame is provided with a first ejection structure. The first ejection structure is provided with a first ejector pin. The first ejector pin can pass through the transfer frame and extend into the positioning groove.

[0016] As a preferred embodiment of the integrated device for feeding and removing PIN pins on the back shell provided by the present invention, the sprue removal mechanism includes a frame fixed on the machine frame, a back shell positioning seat fixed on the frame and a back shell positioning groove provided on the back shell positioning seat, two sets of sliding parts driven by a third cylinder provided in the frame, and a cutter fixed on the sliding parts, the cutter being located below the back shell positioning groove, and a guide groove provided below the frame, the guide groove extending out of the machine frame.

[0017] As a preferred embodiment of the integrated device for feeding PIN pins and removing sprue provided by the present invention, the top of the frame is provided with bearing seats on both sides of the rear shell positioning seat, and a pressure plate is movably connected to the bearing seats. A fourth cylinder is fixed on the frame, and the output end of the fourth cylinder is connected to one end of the pressure plate.

[0018] As a preferred embodiment of the integrated device for feeding and removing PIN pins on the back shell provided by the present invention, the transfer mechanism further includes a transfer frame. The PIN pin transfer unit and the back shell transfer unit are mounted on the transfer frame. The transfer frame is connected to a mounting column via a gear structure. The mounting column is connected to a three-axis linear motion mechanism.

[0019] As a preferred embodiment of the integrated device for feeding and removing PIN pins in the rear shell provided by the present invention, the PIN pin transfer unit includes a fixing block located at the bottom of the transfer frame, the fixing block having a placement groove for placing PIN pins, and the transfer frame having a second ejection structure for ejecting the PIN pins from the placement groove.

[0020] As a preferred embodiment of the back shell PIN needle feeding and sprue removal integrated device provided by the present invention, the back shell transfer unit includes a fifth cylinder and a lifting frame located at the bottom of the transfer frame. The output end of the fifth cylinder is connected to the lifting frame, and the lifting frame is provided with a suction cup for adsorbing the back shell.

[0021] The present invention also provides a method for feeding PIN pins and removing sprue marks on the back shell based on the above-mentioned device, which includes the following steps:

[0022] S1. The feeding mechanism arranges the PIN pins and discharges them to the unloading mechanism;

[0023] S2. The material handling mechanism adsorbs and fixes the PIN needles and transfers them to the transfer and positioning mechanism;

[0024] S3. The transfer positioning mechanism moves the PIN needle to the vicinity of the sprue removal mechanism;

[0025] S4. The three-axis linear motion mechanism drives the transfer mechanism to move. The PIN transfer unit attracts the PIN and moves the PIN to the injection mold. The PIN is then matched with the back shell mold in the injection mold to perform insert injection molding.

[0026] S5. After mold opening, the back shell transfer unit absorbs the injection-molded back shell and transfers it to the sprue removal mechanism. The sprue removal mechanism removes the sprue from the back shell and places it on the finished product conveying mechanism to output the finished back shell.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The integrated equipment and method for back shell PIN feeding and sprue removal provided by the present invention arranges and supplies PIN pins through a feeding mechanism, improving material handling stability and reducing misalignment and jamming problems. The material handling mechanism adsorbs and fixes the PIN pins and transfers them to the transfer positioning mechanism, ensuring the PIN pins maintain a stable posture during transfer and improving transfer reliability. The transfer positioning mechanism positions the PIN pins, improving the matching accuracy between the PIN pins and the mold and shortening the subsequent transfer path. The three-axis linear motion mechanism drives the transfer mechanism to move in the X, Y, and Z directions, and the PIN pin transfer unit sends the PIN pins into the injection mold for insert injection molding, improving insert assembly accuracy and reducing errors. The back shell transfer unit adsorbs the back shell after mold opening and sends it to the sprue removal mechanism, reducing manual intervention and lowering the risk of surface damage. Through the coordinated design of equipment structure and process steps, an integrated automatic production solution for PIN pin feeding, positioning, insert injection molding, and sprue removal is formed, thereby reducing manual intervention, improving production efficiency, and enhancing the consistency of back shell product quality. Attached Figure Description

[0028] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the rear shell structure after injection molding;

[0030] Figure 2 A three-dimensional schematic diagram of the overall structure of the integrated device for back shell PIN pin feeding and sprue removal provided by the present invention;

[0031] Figure 3 A partial structural schematic diagram of the integrated device for back shell PIN pin feeding and sprue removal provided by the present invention;

[0032] Figure 4 This is a three-dimensional schematic diagram of the material handling mechanism in the integrated device for feeding and removing PIN pins on the back shell provided by the present invention.

[0033] Figure 5 A schematic diagram showing the docking of the feeding mechanism and the unloading mechanism in the integrated equipment for feeding and removing PIN pins on the back shell provided by the present invention.

[0034] Figure 6 This is an exploded view of the material handling mechanism in the integrated device for feeding and removing PIN pins on the back shell provided by the present invention.

[0035] Figure 7A schematic diagram of the feeding bar of the material handling mechanism in the integrated equipment for feeding and removing PIN pins in the back shell provided by the present invention;

[0036] Figure 8 A three-dimensional schematic diagram of the transfer and positioning mechanism in the integrated equipment for back shell PIN pin feeding and sprue removal provided by the present invention;

[0037] Figure 9 for Figure 8 A plan view;

[0038] Figure 10 for Figure 9 A schematic diagram of the AA cross-section;

[0039] Figure 11 This is a three-dimensional schematic diagram of the gate cutting mechanism in the integrated equipment for back shell PIN pin feeding and gate cutting provided by the present invention.

[0040] Figure 12 This is a schematic diagram of the internal structure of the gate cutting mechanism in the integrated equipment for back shell PIN pin feeding and gate cutting provided by the present invention.

[0041] Figure 13 for Figure 11 Top view;

[0042] Figure 14 for Figure 13 Schematic diagram of the BB cross section;

[0043] Figure 15 A three-dimensional schematic diagram of the transfer mechanism in the integrated equipment for back shell PIN pin feeding and sprue removal provided by the present invention;

[0044] Figure 16 This is a three-dimensional schematic diagram of the transfer mechanism in the integrated device for back shell PIN needle feeding and sprue removal provided by the present invention;

[0045] Figure 17 for Figure 15 Top view;

[0046] Figure 18 for Figure 17 Schematic diagram of the CC section;

[0047] Figure 19 This is a schematic diagram of the cutting blade and the back shell position structure in the integrated device for back shell PIN pin feeding and sprue removal provided by the present invention.

[0048] The markings in the diagram are explained as follows:

[0049] 100. Rear shell; 101. Sprue; 1. Frame; 2. Injection mold; 3. Feeding mechanism; 31. Vibratory feeder; 32. Linear feeding track; 4. Picking mechanism; 41. Stand; 42. Guide chute; 43. First cylinder; 44. Feed bar; 45. Limiting plate; 46. First notch; 47. Second notch; 48. Detection sensor; 49. X-axis linear guide module; 410. Slide; 411. Second cylinder; 412. Adsorption structure; 5. Transfer and positioning mechanism; 51. Y-axis linear guide module; 52. Transfer frame; 53. Positioning groove; 54. First ejection structure; 55. First 6. Ejector pin; 6. Sprue cutting mechanism; 61. Frame; 62. Rear shell positioning seat; 63. Rear shell positioning groove; 64. Third cylinder; 65. Sliding part; 66. Cutter; 67. Guide groove; 68. Shaft seat; 69. Pressure plate; 610. Fourth cylinder; 7. PIN needle transfer unit; 71. Fixing block; 72. Placement groove; 73. Second ejection structure; 74. Positioning column; 8. Rear shell transfer unit; 81. Fifth cylinder; 82. Lifting frame; 83. Suction cup; 84. Flexible column; 9. Transfer mechanism; 91. Transfer frame; 92. Gear structure; 93. Mounting column; 10. Protective cover; 11. Control panel. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0053] Example 1

[0054] like Figure 1 The diagram shows a schematic of the structure of a back shell after injection molding. In this back shell 100 structure, there are two sprue gates 101. Both sprue gates 101 are located on the inner side of the back shell 100 and at diagonal positions. After injection molding, the sprue gates 101 need to be removed. The internal structure of the back shell 100 is relatively complex, and traditional cutting structures are difficult to remove the sprue gates 101 in this structure.

[0055] Please refer to Figures 2-3 This invention provides an integrated device for feeding and removing PIN pins from a rear shell, comprising a frame 1 and an injection mold 2. The frame 1 supports the various functional mechanisms and provides overall support. The injection mold 2 is mounted on an injection molding machine and located on one side of the frame 1. The injection mold 2 is used for injection molding the inserts of the rear shell. The frame 1 preferably adopts a high-strength profile splicing or welding structure, and reinforcing ribs are set at key installation positions to improve overall vibration resistance and ensure long-term operational accuracy. A feeding mechanism 3, a picking mechanism 4, a transfer and positioning mechanism 5, and a sprue removal mechanism 6 are installed on the frame 1. The enclosure is equipped with a protective cover 10 and a control panel 11. A transfer mechanism 9 is suspended above the frame 1. The transfer mechanism 9 is connected to a three-axis linear motion mechanism (not shown in the figure). The three-axis linear motion mechanism preferably adopts a linear module driven by a servo motor to achieve high-precision positioning and repeatability control. The three-axis linear motion mechanism drives the transfer mechanism 9 to move in the X, Y and Z axis directions. The transfer mechanism 9 includes a PIN needle transfer unit 7 and a rear shell transfer unit 8. The PIN needle transfer unit 7 is used to adsorb the PIN needles in the transfer positioning mechanism 5, and the rear shell transfer unit 8 is used to adsorb the rear shell.

[0056] Specifically, such as Figure 5 As shown, the feeding mechanism 3 is used to arrange and feed multiple PIN needles. The feeding mechanism 3 includes a vibratory feeder 31 and a linear feeding track 32. The vibratory feeder 31 realizes the orientation arrangement of the PIN needles by vibration, so that the PIN needles are output to the linear feeding track 32 in a unified direction. The linear feeding track 32 further arranges the PIN needles for output, thereby outputting the PIN needles one by one in sequence.

[0057] Specifically, such as Figures 4-7As shown, the material handling mechanism 4 is located at the outlet of the linear feeding track 32 and is used to remove the arranged PIN pins. The material handling mechanism 4 includes a stand 41, a guide chute 42, and a first cylinder 43. The output end of the first cylinder 43 is fixedly connected to a feeding bar 44. The feeding bar 44 is slidably connected to the guide chute 42, and a limiting plate 45 is fixedly connected to the guide chute 42. The bottom surface of the limiting plate 45 is in contact with the top surface of the guide chute 42 and the surface of the feeding bar 44. The feeding bar 44 and the guide chute 42 are respectively provided with a first notch 46 and a second notch 47 on the same side. The first notch 46 holds a single PIN pin at a time, and the second notch 47 is aligned with the outlet of the feeding mechanism 3. Next, the first cylinder 43 drives the feeding bar 44 to slide. When the first notch 46 and the second notch 47 are aligned, the PIN needle enters the first notch 46 from the second notch 47. The first cylinder 43 drives the feeding bar 44 to move until the first notch 46 extends beyond the coverage of the limiting plate 45. A detection sensor 48 is fixed on the limiting plate 45. The bottom of the limiting plate 45 and the first notch 46 are provided with through holes corresponding to the detection sensor 48. The detection sensor 48 is preferably a photoelectric sensor or a fiber optic sensor, used to detect whether the PIN needle is in place and to feed the detection signal back to the control system, thereby realizing closed-loop control of the feeding action and improving the degree of automation. Furthermore, the material handling mechanism 4 also includes an X-axis linear guide module 49 and a slide block 410. The slide block 410 is slidably connected to the X-axis linear guide module 49. A second cylinder 411 is fixed on the slide block 410. The second cylinder 411 is provided with an adsorption structure 412. The adsorption structure 412 is used to adsorb and fix the PIN needle on the first notch 46. The adsorption structure 412 is a negative pressure adsorption head and is connected to a vacuum generator. The X-axis linear guide module 49 drives the slide block 410 to move back and forth between the transfer positioning mechanism 5 and the first notch 46. After adsorbing and fixing the PIN needle, the PIN needle is placed on the transfer positioning mechanism 5.

[0058] like Figure 3 , Figures 8-10As shown, the transfer and positioning mechanism 5 is used to transfer and position the PIN needles taken out from the picking mechanism 4. Specifically, the transfer and positioning mechanism 5 includes a Y-axis linear guide module 51 and a transfer frame 52. The transfer frame 52 is slidably connected to the Y-axis linear guide module 51. The top of the transfer frame 52 is provided with a positioning groove 53 for positioning and placing the PIN needles. After the adsorption structure 412 adsorbs the PIN needles, the X-axis linear guide module 49 moves the PIN needles above the transfer frame 52 and places the PIN needles into the positioning groove 53. The Y-axis linear guide module 51 drives... The shifting frame 52 moves along the Y-axis direction, and moves the shifting frame 52 to the same X-axis direction as the sprue cutting mechanism 6, so as to facilitate the subsequent adsorption of the transfer mechanism 9. The shifting frame 52 is provided with a first ejection structure 54, and a first ejector pin 55 is provided on the first ejection structure 54. The first ejector pin 55 can pass through the shifting frame 52 and extend into the positioning groove 53. The positioning groove 53 is a limiting structure that matches the shape of the PIN needle, thereby restricting the posture of the PIN needle and preventing it from flipping. At the same time, the first ejector pin 55 is used to eject the PIN needle during subsequent picking and placing to avoid jamming.

[0059] like Figures 11-14 , Figure 19As shown, the sprue removal mechanism 6 is used to remove the sprue from the back shell after mold opening. The sprue removal mechanism 6 includes a frame 61 fixed on the frame 1. A back shell positioning seat 62 is fixed on the frame 61, and a back shell positioning groove 63 is provided on the back shell positioning seat 62. Two sets of sliding members 65 driven by third cylinders 64 are provided inside the frame 61. The sliding members 65 are slidably connected to the rails on the frame 61. Each sliding member 65 is driven by a third cylinder 64, and two cutters 66 are fixed on each sliding member 65. The cutters 66 are located below the back shell positioning groove 63, and the top surface of the cutters 66 is in contact with the inner wall of the back shell. Two sprue marks on each back shell correspond to two cutters 66. The cutters 66 have a slender structure, which facilitates movement in the narrow space inside the back shell, and the cutting edge of the cutter faces the side of the sprue. In this way, when the sliding member 65 moves, the cutter 66 can cut the sprue marks inside the back shell. A guide groove 67 is provided below the frame 61. The two sets of cutters 66 are preferably arranged in a rotationally symmetrical manner and operate simultaneously to achieve synchronous shearing of the two sprues on the two sets of rear shells. This optimizes the arrangement space, thereby improving the flatness of the cut and reducing residual burrs. The cut sprues fall from the frame 61 into the guide trough 67, thus discharging the sprue waste. Furthermore, the top of the frame 61 is provided with bearing seats 68 on both sides of the rear shell positioning seat 62. A pressure plate 69 is movably connected to the bearing seat 68. A fourth cylinder 610 is fixed on the frame 61. The output end of the fourth cylinder 610 is connected to one end of the pressure plate 69. After the rear shell transfer unit 8 adsorbs the rear shell, the rear shell transfer unit 8 is attached to the rear shell positioning seat 62. Then, the fourth cylinder 610 drives the pressure plate 69 to rotate, using the pressure plate 69 to press the two ends of the rear shell transfer unit 8. The rear shell transfer unit 8 and the rear shell positioning seat 62 clamp and fix the rear shell, preventing displacement of the rear shell when the cutter 66 operates, and improving cutting stability.

[0060] Furthermore, such as Figures 15-18As shown, the transfer mechanism 9 also includes a transfer frame 91, a PIN needle transfer unit 7 and a rear shell transfer unit 8 mounted on the transfer frame 91. The transfer frame 91 is connected to a mounting column 93 via a gear structure 92. The mounting column 93 is connected to a three-axis linear motion mechanism. The gear structure 92 is connected to a motor. The gear structure 92 and the motor work together to adjust the angle of the transfer frame 91, enabling the transfer mechanism 9 to complete pick-up and put-down actions at different angles and improving the flexibility of the equipment. Specifically, the PIN needle transfer unit 7 includes a fixing block 71 located at the bottom of the transfer frame 91. The fixing block 71 has a placement groove 72 for placing PIN needles. The fixing block 71 is connected to the vacuum system through a vacuum tube for vacuum adsorption and fixing of PIN needles. The transfer frame 91 has a second ejection structure 73 for ejecting PIN needles from the placement groove 72. The second ejection structure 73 is a miniature cylinder or an elastic ejector structure to ensure reliable release of PIN needles and prevent the problem of PIN needles being unable to detach due to vacuum residue. The back shell transfer unit 8 includes a fifth cylinder 81 and a lifting frame 82 located at the bottom of the transfer frame 91. The output end of the fifth cylinder 81 is connected to the lifting frame 82. The lifting frame 82 has a suction cup 83 for adsorbing the back shell. The lifting and lowering action of the back shell is achieved by driving the fifth cylinder 81. The suction cup 83 is preferably made of flexible silicone to adapt to the curved surface structure of the back shell and improve the adsorption sealing, thereby enhancing the adsorption stability and preventing surface damage. Furthermore, positioning posts 74 are provided around the fixed block 71, and matching positioning holes are provided on the matching shift frame 52 and the injection mold 2. This ensures accuracy when picking up and placing PIN pins. At the same time, flexible posts 84 are also arranged around the suction cup 83, and matching holes are also provided on the rear shell positioning seat 62 and the injection mold 2. This provides a buffer positioning effect when picking up and placing the rear shell, avoiding damage to the rear shell.

[0061] Furthermore, the equipment also includes a control system, which is electrically connected to each cylinder, sensor and three-axis linear motion mechanism to coordinate the action sequence of each mechanism, so that PIN needle feeding, transfer, positioning, injection molding and sprue removal form a continuous automated operation process, thereby realizing cycle-based production and improving overall production efficiency.

[0062] In actual operation, the feeding mechanism 3 first arranges and outputs the PIN pins. After the detection sensor 48 confirms that the PIN pins are in place, the picking mechanism 4 drives the feeding bar 44 to move so that the PIN pins enter the picking position. Then, the adsorption structure 412 simultaneously picks up the PIN pins and transfers them to the transfer positioning mechanism 5. The transfer positioning mechanism 5 accurately positions the PIN pins through the positioning groove 53. At the same time, the first ejector pin 55 assists in adjusting the position of the PIN pins. Then, the three-axis linear motion mechanism drives the transfer mechanism 9 to move. The PIN pin transfer unit 7 sends the PIN pins into the injection mold 2 for insert injection molding. After the injection molding is completed and the mold is opened, the back shell transfer unit 8 adsorbs the back shell and transfers it to the sprue removal mechanism 6. The pressure plate 69 presses the back shell transfer unit 8, the cutter 66 completes the sprue removal, and the waste material is discharged through the guide groove 67. The finished back shell is transported to the next process. The above process is executed in a cycle to realize continuous automated production.

[0063] Example 2

[0064] Example 2 provides a method for feeding PIN pins and removing sprue marks from the back shell based on the above-mentioned equipment, which includes the following steps:

[0065] S1. The feeding mechanism 3 arranges the PIN needles and discharges them to the picking mechanism 4. In this step, the PIN needles are oriented and arranged by the vibratory plate 31 and the linear feeding track 32, so that the PIN needles maintain a uniform posture for output, improve the arrangement stability and ensure the subsequent picking accuracy.

[0066] S2. The material handling mechanism 4 adsorbs and fixes the PIN needle and transfers it to the transfer positioning mechanism 5. In this step, the PIN needle is adsorbed by the adsorption structure 412, and the adsorption status is confirmed by negative pressure detection or sensor during the adsorption process to avoid missed adsorption or material drop. At the same time, the stable transfer is achieved by the X-axis linear guide module 49 to improve the consistency of material handling.

[0067] S3. The transfer positioning mechanism 5 moves the PIN needle to the vicinity of the sprue cutting mechanism 6. In this step, the PIN needle is limited and positioned by setting the positioning groove 53, and the PIN needle is finely adjusted or ejected by the ejector structure so that the PIN needle is in a precise position. At the same time, the PIN needle is moved to the area near the injection molding station in advance, thereby shortening the subsequent transfer path and improving the overall cycle efficiency.

[0068] S4. The three-axis linear motion mechanism drives the transfer mechanism 9 to move. The PIN transfer unit 7 picks up the PIN and moves the PIN to the injection mold 2. The PIN is then matched with the back shell mold in the injection mold 2 to perform insert injection molding. In this step, the three-axis linear motion mechanism realizes the linkage control of the X-axis, Y-axis and Z-axis, so that the PIN can be accurately aligned with the position of the mold cavity. The synchronous placement is achieved through program control, thereby improving the installation accuracy of the insert and reducing the misalignment phenomenon. At the same time, the PIN is fixed during the injection process to prevent displacement.

[0069] S5. After mold opening, the rear shell transfer unit 8 adsorbs the injection-molded rear shell and transfers it to the sprue removal mechanism 6. The sprue removal mechanism 6 removes the sprue from the rear shell and places it on the finished product conveying mechanism to output the finished rear shell. In this step, the rear shell is flexibly adsorbed by the suction cup 83 and stably transferred. At the same time, the rear shell transfer unit 8 is pressed and positioned by the pressure plate 69. Then, the cutter 66 removes the sprue simultaneously. The removed waste is discharged through the guide groove 67 to improve the flatness of the cut and reduce the generation of burrs.

[0070] S6. Repeat steps S1-S5. By cyclically executing the above steps, a continuous automated production process is formed. The control system coordinates the cycle time of each step, so that the feeding, injection molding and cutting processes are connected to each other, thereby significantly improving production efficiency and ensuring product consistency.

[0071] The working principle of the integrated equipment and method for back shell PIN feeding and sprue removal provided by this invention is as follows: The feeding mechanism 3 arranges and supplies PIN pins, improving material handling stability and reducing misalignment and jamming problems. The picking mechanism 4 adsorbs and fixes the PIN pins and transfers them to the transfer and positioning mechanism 5, ensuring the PIN pins maintain a stable posture during transfer and improving transfer reliability. The transfer and positioning mechanism 5 positions the PIN pins, improving the matching accuracy between the PIN pins and the mold and shortening the subsequent transfer path. The three-axis linear motion mechanism drives the transfer mechanism 9 to move in the X, Y, and Z directions, and the PIN pin transfer unit 7 sends the PIN pins into the injection mold 2 for insert injection molding, improving insert assembly accuracy and reducing errors. After mold opening, the back shell transfer unit 8 adsorbs the back shell and sends it to the sprue removal mechanism 6, reducing manual intervention and lowering the risk of surface damage. Through the coordinated design of equipment structure and process steps, an integrated automatic production solution for PIN pin feeding, positioning, insert injection molding, and sprue removal is formed, thereby reducing manual intervention, improving production efficiency, and enhancing the consistency of back shell product quality.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A device for feeding and removing sprue gates from a rear shell PIN, comprising a frame and an injection mold, characterized in that, Also includes: The feeding mechanism is used to feed multiple PIN pins in an orderly fashion. The material handling mechanism, located at the discharge port of the feeding mechanism, is used to remove the arranged PIN pins; A transfer and positioning mechanism for transferring and positioning PIN pins taken out from the picking mechanism; A sprue removal mechanism is used to remove the sprue from the rear shell after mold opening. The transfer mechanism includes a PIN needle transfer unit and a rear shell transfer unit. The PIN needle transfer unit is used to adsorb the PIN needles in the transfer and positioning mechanism, and the rear shell transfer unit is used to adsorb the rear shell. The transfer mechanism is connected to a three-axis linear motion mechanism, which drives the transfer mechanism to move in the X-axis, Y-axis and Z-axis directions. The transfer mechanism also includes a transfer frame, on which the PIN needle transfer unit and the rear shell transfer unit are mounted. The transfer frame is connected to a mounting column via a gear structure, and the mounting column is connected to a three-axis linear motion mechanism. The PIN transfer unit includes a fixing block located at the bottom of the transfer frame, the fixing block having a placement slot for placing PINs, and the transfer frame having a second ejection structure for ejecting the PINs from the placement slot. The rear shell transfer unit includes a fifth cylinder and a lifting frame located at the bottom of the transfer frame. The output end of the fifth cylinder is connected to the lifting frame, and the lifting frame is equipped with a suction cup for adsorbing the rear shell.

2. The integrated equipment for back shell PIN pin feeding and sprue removal according to claim 1, characterized in that, The material handling mechanism includes a stand, a guide chute, and a first cylinder. The output end of the first cylinder is fixedly connected to a feeding bar. The feeding bar is slidably connected to the guide chute, and a limiting pressure plate is fixedly connected to the guide chute. A first notch and a second notch are respectively provided on the same side of the feeding bar and the guide chute. The second notch is connected to the discharge port of the feeding mechanism. A detection sensor is fixed on the limiting pressure plate. The bottom of the limiting pressure plate and the first notch are both provided with through holes corresponding to the detection sensor.

3. The integrated equipment for feeding PIN pins and removing sprue marks according to claim 2, characterized in that, The material handling mechanism also includes an X-axis linear guide module and a slide block. The slide block is slidably connected to the X-axis linear guide module. A second cylinder is fixed on the slide block. The second cylinder is provided with an adsorption structure, which is used to adsorb the PIN pin on the first notch.

4. The integrated equipment for feeding PIN pins and removing sprue marks according to claim 1, characterized in that, The transfer positioning mechanism includes a Y-axis linear guide module and a transfer frame. The transfer frame is slidably connected to the Y-axis linear guide module. The top of the transfer frame is provided with a positioning groove for positioning and placing PIN pins. The transfer frame is provided with a first ejector structure. The first ejector structure is provided with a first ejector pin. The first ejector pin can pass through the transfer frame and extend into the positioning groove.

5. The integrated equipment for feeding PIN pins and removing sprue marks according to claim 1, characterized in that, The sprue removal mechanism includes a frame fixed on the machine frame, a rear shell positioning seat fixed on the frame and a rear shell positioning groove provided on the rear shell positioning seat, two sets of sliding parts driven by a third cylinder provided inside the frame, and a cutter fixed on the sliding parts. The cutter is located below the rear shell positioning groove, and a guide groove is provided below the frame, extending out of the machine frame.

6. The integrated equipment for feeding PIN pins and removing sprue marks according to claim 5, characterized in that, The top of the frame is provided with bearing seats on both sides of the rear shell positioning seat. A pressure plate is movably connected to the bearing seats. A fourth cylinder is fixed on the frame, and the output end of the fourth cylinder is connected to one end of the pressure plate.

7. A method for feeding PIN pins and removing sprue marks from the rear shell of the device according to any one of claims 1-6, characterized in that, Includes the following steps: S1. The feeding mechanism arranges the PIN pins and discharges them to the unloading mechanism; S2. The material handling mechanism adsorbs and fixes the PIN needles and transfers them to the transfer and positioning mechanism; S3. The transfer positioning mechanism moves the PIN needle to the vicinity of the sprue removal mechanism; S4. The three-axis linear motion mechanism drives the transfer mechanism to move. The PIN transfer unit attracts the PIN and moves the PIN to the injection mold. The PIN then engages with the back shell mold in the injection mold to perform insert injection molding. S5. After mold opening, the back shell transfer unit absorbs the injection-molded back shell and transfers it to the sprue removal mechanism. The sprue removal mechanism removes the sprue from the back shell and places it on the finished product conveying mechanism to output the finished back shell.

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