A material placing and feeding platform for two-color injection molding middle mold insert injection

Abstract

The application discloses a material placing and feeding platform for double-color injection molding middle mold insert injection, a suction structure for grabbing an insert is installed on a turnover structure, a jig is fixed on a base, a plurality of center positioning structures for nuts are uniformly distributed on the jig, a detection structure for detecting nuts above the jig is sleeved on each center positioning structure, a driving structure is installed on the jig and is in sliding connection with the center positioning structure, so that the nut insert can be accurately fixed at the center position, displacement of the nut insert in the process of transfer or injection molding is avoided, insert inner insert precision is ensured, the detection structure is arranged in pairs with each center positioning structure, the existence of the insert is sensed through a pressure sensor, when the insert is missed or abnormally placed, an alarm can be triggered in time through a controller, and unqualified products are prevented from flowing into subsequent processes.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment, and more particularly to a material feeding platform for in-mold insert injection molding in two-color injection molding. Background Technology

[0002] In two-color injection molding, the assembly of in-mold inserts is a critical process. Nut inserts and diaphragm inserts typically need to be precisely embedded into the injection mold to ensure the structural strength and assembly accuracy of the finished product. Currently, the industry mostly uses manual labor or simple mechanical devices for the placement and feeding of in-mold inserts in two-color injection molding. When manually loading inserts, individual differences in operator skill and fatigue from prolonged work can easily lead to inaccurate insertion. For example, if the nut insert is not accurately placed in the designated position in the mold, it will shift during injection molding, resulting in defects in the final product and seriously affecting product quality stability. Furthermore, the repetitive and monotonous loading work can easily cause worker fatigue, reducing work efficiency and significantly increasing the risk of missing inserts. Once a missing insert occurs, the entire injection-molded product becomes defective, resulting in a double waste of raw materials and production costs. Summary of the Invention

[0003] The present invention proposes a material feeding platform for injection molding of inserts in two-color injection molding, which solves the above-mentioned problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A material feeding platform for in-mold insert injection molding in two-color injection molding includes a base. A vibrating material tray for arranging an array of nut inserts is installed on the upper right half of the base. The nuts can be arranged within the vibrating material tray for easy subsequent gripping. A diaphragm cartridge stores diaphragm inserts, with the diaphragms stacked sequentially from top to bottom within the cartridge. A horizontal module is fixed above the base via a bracket. A vertical module is mounted on the slider of the horizontal module, and a vertical module is mounted on the slider of the vertical module. A flipping structure is fixed on the slider of the vertical module, and an adsorption structure for gripping the inserts is installed on the flipping structure. A fixture is fixed on the base, and multiple centering positioning structures for nuts are evenly distributed on the fixture. Each centering positioning structure is fitted with a detection structure for detecting nuts above the fixture. A driving structure is installed on the fixture, and the driving structure is slidably connected to the centering positioning structures.

[0005] Preferably, the flipping structure includes a fixed frame fixed on the slider of the vertical module, a flipping frame rotatably mounted on the lower end of the fixed frame via a rotating shaft, and a flipping cylinder rotatably mounted on the fixed frame via a pivot pin. The push rod of the flipping cylinder is rotatably connected to the flipping frame via a pivot pin, and the extension of the push rod of the flipping cylinder can cause the flipping frame to flip 90 degrees around the rotating shaft as the axis.

[0006] Preferably, the adsorption structure includes an electric rotating platform fixed below the flipping frame by a bracket. A square mounting frame is fixed on the rotating platform of the electric rotating platform. Multiple suction cups 1, 2, and 3 are respectively installed on three sides of the mounting frame. Suction cups 1, 2, and 3 are all connected to an external vacuum pump through hoses, and they are all special suction cups. A rigid suction tube is fixed on the suction cup. One end of the suction cup that extends into the suction cup is sealed, and multiple suction cups are arranged in a ring array on the surface of this end. The position of the suction cup is the same as the position of the nut. The nut is a cylindrical nut, and the suction cup can contact the top surface of the circular nut to adsorb it.

[0007] Preferably, the fixture includes a fixed base fixed above the base, and an upper template is suspended and fixed on the fixed base by a support column. The upper template has multiple evenly distributed embedding slots, and the bottom of the embedding slots forms through holes. The distance between two adjacent through holes in the same row is the same as the distance between two suction cups. Each through hole is equipped with a centering positioning structure, and the distance between two adjacent centering positioning structures in the same row is the same as the distance between two suction cups.

[0008] Preferably, the driving structure includes four guide columns fixed between the fixed seat and the upper template. The four guide columns are distributed in a rectangular structure. The four guide columns are slidably sleeved with a driving plate. A lifting plate is fixed at the bottom of the driving plate. An inclined lifting groove is opened on the lifting plate. A driving cylinder is fixed on the right side of the fixed seat by a bracket. A driving roller is installed on the push rod of the driving cylinder. The driving roller is rotatably inserted into the lifting groove. The end of the lifting slide near the drive cylinder is higher than the end of the lifting slide away from the drive cylinder. When the push rod of the drive cylinder extends and drives the drive roller to move to the left away from the drive cylinder, the drive roller will push the lifting plate upward through the lifting slide, so that the entire drive plate moves upward in a straight line along the guide column.

[0009] Preferably, the centering positioning structure includes three linear slide blocks arranged in a circular array. The linear slide blocks are slidably installed below the upper template. Each linear slide block is fixed with an expansion rod. The three expansion rods pass through the through-hole and are embedded in the groove above the upper template. The three expansion rods are arranged in a circular array, and the center of the circular structure formed by them is collinear with the center of the through-hole. An expansion groove is provided on the linear slide block. An expansion roller is rotatably installed above the drive plate via a bracket. The expansion roller is slidably inserted into the expansion groove. When the drive plate moves up and down, the three expansion rods can be synchronously expanded or contracted through the expansion roller.

[0010] Preferably, the linear slide has an inverted L-shaped structure, and a guide groove is provided on the linear slide. A guide block is slidably inserted in the guide groove. The guide block is fixed to the lower surface of the upper template by screws. Both the guide groove and the guide block have a convex cross-section. The linear slide can move linearly along the guide block below the upper template.

[0011] Preferably, the expansion groove includes a vertically arranged retaining groove, and the bottom end of the retaining groove is provided with an inclined moving groove. In the initial state, the expansion roller is located at the bottom of the moving groove. At this time, the distance between the three expansion rods in the central positioning structure is the closest, and the size of the circular structure formed by the three expansion rods is smaller than the inner diameter of the nut. The nut can be smoothly fitted onto the three expansion rods. When the expansion roller is at the intersection of the retaining groove and the moving groove, the distance between the three expansion rods is the farthest.

[0012] Preferably, the detection structure includes a pressure sensor that slides vertically into an embedded groove. Multiple lifting columns arranged in a ring array are fixed to the bottom of the pressure sensor. These lifting columns pass through an upper template and are positioned below it. Three lifting slots arranged in a ring array are provided on the housing of the pressure sensor. A support structure is installed within each lifting slot. A pressure plate is fixed to the top of each of the three support structures. The pressure plate has a convex cross-section, meaning it includes a ring. A sleeve of a certain thickness is welded to the lower end of the ring and is positioned directly above the detection terminal of the pressure sensor. The pressure sensor is connected to a controller via a signal line. The controller is connected to an external buzzer, and a threshold value is set in the controller.

[0013] Preferably, the support structure includes a support rod that slides vertically into the lifting groove, and a support spring is placed in the lifting groove, with the upper and lower ends of the support spring abutting against the bottom end of the support rod and the bottom end of the lifting groove, respectively.

[0014] The beneficial effects of this invention are: 1. This invention achieves automatic array sorting of nut inserts through a vibrating feeder, orderly storage of diaphragms through a diaphragm magazine, and a multi-axis moving mechanism composed of horizontal, vertical and longitudinal modules, as well as a flipping structure and a multi-functional adsorption structure, to complete the fully automated operation from insert gripping, transfer, positioning to diaphragm adsorption and in-mold bonding. The entire process requires no manual intervention, avoids the uncertainty of manual operation, and enables precise control of the time of each production cycle, effectively improving the overall rhythm stability of the production line. Compared with traditional manual operation, it improves production efficiency and significantly increases the output of qualified products per unit time. 2. By setting up a central positioning structure consisting of three circumferentially distributed expansion rods, synchronous expansion and contraction can be achieved under the drive of the drive structure. This can accurately fix the nut insert in the center position, preventing it from shifting during transportation or injection molding and ensuring the insert's internal setting accuracy. At the same time, each central positioning structure is equipped with a detection structure. The presence or absence of the insert is detected by a pressure sensor. When an insert is detected to be missing or abnormally placed, an alarm can be triggered in time by the controller to prevent defective products from flowing into subsequent processes. Attached Figure Description

[0015] Figure 1 This is a front view of a material feeding platform for injection molding of in-mold inserts in two-color injection molding, as proposed in this invention. Figure 2 for Figure 1 Schematic diagram of the adsorption structure and the inversion structure; Figure 3 for Figure 1 A schematic diagram of the central fixture, the centering positioning structure, the detection structure, and the driving structure; Figure 4 for Figure 3 Partial sectional view; Figure 5 for Figure 4 Enlarged schematic diagram of point A in the middle; Figure 6 for Figure 3 Front view of the centering positioning structure, detection structure, and driving structure; Figure 7 for Figure 5 A schematic diagram of the center-positioning structure; Figure 8 for Figure 5 A schematic diagram of the detection structure.

[0016] Numbering on the map: 1. Base; 2. Vibrating feeder; 3. Horizontal module; 31. Vertical module; 32. Vertical column; 33. Flipping structure; 331. Fixing frame; 332. Flipping cylinder; 333. Flipping frame; 4. Adsorption structure; 41. Electric rotary table; 42. Mounting bracket; 43. Suction cup one; 44. Suction cup two; 45. Suction cup three; 5. Diaphragm magazine; 6. Fixture; 61. Fixture base; 62. Upper template; 621. Embedded groove; 622. Through hole; 7. Drive structure; 71. Drive plate; 72. Drive cylinder; 721. Drive roller; 73. Guide column; 74. Expansion roller; 75. Lifting plate; 76. Lifting chute; 8. Centered positioning structure; 81. Expansion rod; 82. Linear slide; 821. Guide block; 822. Guide groove; 83. Expansion groove; 831. Moving inclined groove; 832. Holding groove; 9. Detection structure; 91. Pressure sensor; 92. Pressure plate; 93. Support structure; 931. Support rod; 932. Support spring; 94. Lifting column. Detailed Implementation

[0017] 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.

[0018] Reference Figure 1 - Figure 8 A material feeding platform for in-mold insert injection molding in two-color injection molding includes a base 1. A vibrating material tray 2 for arranging nut insert arrays is installed on the upper right half of the base 1. The vibrating material tray is existing technology. Nuts can be arranged neatly and orderly within the vibrating material tray 2, facilitating subsequent gripping. A diaphragm cartridge 5 stores diaphragm inserts, with diaphragms stacked sequentially from top to bottom within the diaphragm cartridge 5. A horizontal module 3 is fixed above the base 1 via a bracket. A vertical module is mounted on the slider of the horizontal module 3. 31. A vertical module 32 is mounted on the slider of the vertical module 31. A flipping structure 33 is fixed on the slider of the vertical module 32. An adsorption structure 4 for gripping the insert is mounted on the flipping structure 33. A fixture 6 is fixed on the base 1. Multiple centering positioning structures 8 for nuts are evenly distributed on the fixture 6. A detection structure 9 for detecting the nut above the fixture 6 is sleeved on each centering positioning structure 8. A driving structure 7 is mounted on the fixture 6. The driving structure 7 is slidably connected to the centering positioning structure 8.

[0019] Reference Figure 1 , Figure 2 The flipping structure 33 includes a fixed frame 331 fixed on the slider of the vertical module 32. The lower end of the fixed frame 331 is rotatably mounted with a flipping frame 333 via a rotating shaft. A flipping cylinder 332 is also rotatably mounted on the fixed frame 331 via a shaft pin. The push rod of the flipping cylinder 332 is rotatably connected to the flipping frame 333 via a shaft pin. The extension of the push rod of the flipping cylinder 332 can cause the flipping frame 333 to flip 90 degrees around the rotating shaft as the axis.

[0020] Reference Figure 2The adsorption structure 4 includes an electric rotating platform 41 fixed below the flipping frame 333 by a bracket. A square mounting frame 42 is fixed on the rotating platform of the electric rotating platform 41. Multiple suction cups 1 43, 2 44 and 3 45 are respectively installed on the three sides of the mounting frame 42. Suction cups 1 43, 2 44 and 3 45 are all connected to an external vacuum pump through a hose. They are all special suction cups. A rigid suction tube is fixed on the suction cup. One end of the rigid suction tube is sealed inside the suction cup. Multiple suction holes are arranged in a ring array on the surface of the end. The suction holes are connected to the inside of the rigid suction tube. The position of the suction cup is the same as the position of the nut. The nut is a cylindrical nut. The suction cup can fit on the top surface of the round nut and contact it. Then, the top of the nut is adsorbed through the suction holes. There are two suction cups 43. The two suction cups 43 are used to pick up the nuts on the vibrating material plate 2. The second suction cup 44 is used to pick up the diaphragm on the diaphragm magazine 5. The third suction cup 45 is used to pick up the nuts on the fixture 6. At the same time, the distance between the two suction cups 43 is the same as the distance between any two suction cups 45 in the same row. After the two suction cups 43 pick up the nuts, they can be placed on the fixture 6. After the multiple nuts are arranged above the fixture 6, the multiple suction cups 45 can pick up all the nuts on the fixture 6 at once. The adsorption structure 4 can switch between different suction cups via the electric rotating table 41 and the flipping structure 33 to adapt to the gripping requirements of nuts and membranes. The special structural design of the suction cups ensures the stability of adsorption and avoids the situation of inserts falling off or membrane wrinkles during the gripping process, further improving the consistency and reliability of product quality. Specifically, the flipping structure 33 extends the push rod of the flipping cylinder 332, enabling the flipping frame 333 to flip 90 degrees around the axis of rotation. The entire flipping frame 333, as well as the mounting frame 42, suction cup 1 43, suction cup 2 44, and suction cup 3 45 below, all flip 90 degrees. Then, the electric rotary table 41 causes the mounting frame 42 to rotate accordingly, which allows suction cup 1 43 or suction cup 2 44 to switch to the feeding channel of the fixture 6 or the vibrating material tray 2 or the diaphragm magazine 5 to grab or place the corresponding material.

[0021] Reference Figure 3 - Figure 5The fixture 6 includes a fixed base 61 fixed above the base 1. An upper template 62 is suspended on the fixed base 61 by a support column. The upper template 62 has multiple evenly distributed embedding slots 621. The bottom of the embedding slots 621 is downward and forms through openings 622. The distance between two adjacent through openings 622 in the same row is the same as the distance between two suction cups 43. A centering positioning structure 8 is installed in each through opening 622. The distance between two adjacent centering positioning structures 8 in the same row is the same as the distance between two suction cups 43. Since the distance between two suction cups 43 is the same as the distance between any two suction cups 45 in the same row, the position distribution of the nuts on the multiple centering positioning structures 8 is the same as the position distribution of the multiple suction cups 45. The multiple suction cups 45 can grab multiple nuts on the fixture 6 at one time.

[0022] Reference Figure 3 - Figure 6 The drive structure 7 includes four guide columns 73 fixed between the fixed base 61 and the upper template 62. The four guide columns 73 are arranged in a rectangular structure. The drive plate 71 is slidably sleeved on the four guide columns 73. A lifting plate 75 is fixed to the bottom end of the drive plate 71. An inclined lifting groove 76 is opened on the lifting plate 75. A drive cylinder 72 is fixed to the right side of the fixed base 61 by a bracket. A drive roller 721 is installed on the push rod of the drive cylinder 72. The drive roller 721 is rolled into the lifting groove 76. The lifting groove 76 is close to One end of the drive cylinder 72 is higher than the end of the lifting slide 76 that is away from the drive cylinder 72. When the push rod of the drive cylinder 72 extends and drives the drive roller 721 to move to the left away from the drive cylinder 72, the drive roller 721 will push the lifting plate 75 to move upward through the lifting slide 76, so that the entire drive plate 71 moves upward in a straight line along the guide post 73. Conversely, when the push rod of the drive cylinder 72 retracts and drives the drive roller 721 to move to the right and closer to the drive cylinder 72, the drive plate 71 and the lifting plate 75 will move downward in a straight line.

[0023] Reference Figure 4 - Figure 7 The central positioning structure 8 includes three linear slide blocks 82 arranged in a circular array. The linear slide blocks 82 are slidably installed below the upper template 62. Each linear slide block 82 is fixed with an expansion rod 81. The three expansion rods 81 pass through the through-hole 622 and the embedded groove 621 and are placed above the upper template 62. The three expansion rods 81 are arranged in a circular array, and the center of the circular structure formed by them is collinear with the center of the through-hole 622. An expansion groove 83 is opened on the linear slide block 82. An expansion roller 74 is rotatably installed above the drive plate 71 through a bracket. The expansion roller 74 is slidably inserted into the expansion groove 83. When the drive plate 71 moves up and down, the three expansion rods 81 can be expanded or contracted synchronously through the expansion roller 74.

[0024] The linear slide block 82 has an inverted L-shaped structure. A guide groove 822 is provided on the linear slide block 82. A guide block 821 is slidably inserted into the guide groove 822. The guide block 821 is fixed to the lower surface of the upper template 62 by screws. The cross-sections of the guide groove 822 and the guide block 821 are both convex. The linear slide block 82 can move linearly along the guide block 821 below the upper template 62.

[0025] Reference Figure 7 The expansion groove 83 includes a vertically arranged retaining groove 832. The bottom end of the retaining groove 832 is provided with an inclined moving groove 831. In the initial state, the expansion roller 74 is located at the bottom of the moving groove 831. At this time, the distance between the three expansion rods 81 in the central positioning structure 8 is the closest. The size of the circular structure formed by the three expansion rods 81 is smaller than the inner diameter of the nut. The nut can be smoothly fitted onto the three expansion rods 81. When the expansion roller 74 is at the intersection of the retaining groove 832 and the moving groove 831, the distance between the three expansion rods 81 is the farthest. At this time, the outer ring surface of the three expansion rods 81 abuts against the inner ring surface of the nut, so that the nut is located at the center above the through-hole 622 and can be fixed to prevent it from shifting due to shaking. This allows it to be accurately adsorbed at the center of the suction cup 45, so that when it is subsequently inserted into the injection mold, it can be accurately inserted into the required position, improving the insertion accuracy.

[0026] Reference Figure 4 - Figure 8 The detection structure 9 includes a pressure sensor 91 that slides up and down into the embedded groove 621. The bottom end of the pressure sensor 91 is fixed with multiple ring-shaped arrayed lifting columns 94. The lifting columns 94 pass through the upper template 62 and are positioned below the upper template 62. The housing of the pressure sensor 91 has three ring-shaped arrayed lifting grooves. A support structure 93 is installed in the lifting grooves. A pressure plate 92 is fixed at the top of the three support structures 93. The pressure plate 92 has a convex cross-section, that is, the pressure plate 92 includes a ring. A sleeve with a certain thickness is welded to the lower end of the ring. The sleeve is located directly above the detection terminal of the pressure sensor 91. A push-button switch is installed at the bottom end of the lifting column 94. The pressure sensor 91 is connected to the controller through a signal line. The controller is connected to an external buzzer. The push-button switch is installed in the circuit between the controller and the buzzer. A threshold is set in the controller. Under normal conditions, the push-button switch keeps the buzzer in an open circuit state, preventing it from being powered on when squeezed, and thus the buzzer will not sound an alarm.

[0027] When the drive plate 71 rises to a certain height and contacts the push-button switch below the lifting column 94, the distance between the three expansion rollers 74 is at its greatest. The outer surface of the three expansion rods 81 abuts against the inner surface of the nut, so that the nut is at the center above the through-hole 622 and is fixed. Then the drive plate 71 continues to move upward to press the push-button switch, so that current can flow through the buzzer. The pressure plate 92 can press the detection terminal of the pressure sensor 91 to generate a pressure value. If no nut is placed above, the pressure value is less than the set threshold, and it is determined that no nut is present above. At this time, an alarm will be triggered to remind nearby personnel.

[0028] The support structure 93 includes a support rod 931 that slides vertically into the lifting groove, and a support spring 932 placed in the lifting groove. The upper and lower ends of the support spring 932 abut against the bottom end of the support rod 931 and the bottom end of the lifting groove, respectively. When the drive plate 71 moves upward, it will drive the expansion roller 74 to move upward as well. When the expansion roller 74 is at the intersection of the holding groove 832 and the moving inclined groove 831, the three expansion rods 81 in the central positioning structure 8 contact the inner wall of the nut and clamp it. At this time, there is a certain gap between the bottom end of the lifting column 94 and the upper surface of the drive plate 71. Then the drive plate 71 continues to move upward, the expansion roller 74 moves upward in the holding groove 832, and the position of the expansion rods 81 remains unchanged. After the drive plate 71 moves up a certain distance, it will contact the bottom end of the lifting column 94 and push the pressure sensor 91 to move upward. The upward movement of the pressure sensor 91 causes the support spring 932 to be squeezed and compressed. At the same time, the pressure plate 92 will also approach the pressure sensor 91 and contact the pressure sensor 91 to generate a pressure value. When the pressure value is less than the set threshold, it is determined that there is no nut above, and an alarm will be triggered to remind nearby personnel.

[0029] Working principle: In the initial state, the expansion roller 74 is located at the bottom of the moving inclined groove 831. At this time, the three expansion rods 81 in the central positioning structure 8 are closest to each other. The circular structure formed by the three expansion rods 81 is smaller than the inner diameter of the nut. The nut can be smoothly fitted onto the three expansion rods 81. At the same time, the bottom end of the lifting column 94 is a certain distance from the upper surface of the drive plate 71. The pressure sensor 91 is located at the bottom end of the embedded groove 621 under its own gravity.

[0030] A cylindrical nut is installed in the vibrating feeder 2. The vibrating feeder 2 arranges the nuts on the feeding channel of the vibrating feeder 2, and multiple diaphragms are piled up in the diaphragm magazine 5. Then the adsorption structure 4 and the flipping structure 33 move to the feeding channel of the vibrating feeder 2. Then the flipping structure 33 makes the suction cup 43 on the adsorption structure 4 vertically downward. The suction cup 43 adsorbs and grabs the nut and puts the nut on the multiple expansion rods 81 of the centering positioning structure 8. After a nut is fitted onto each of the multiple expansion rods 81 of the centering positioning structure 8, the flipping structure 33 causes the suction cup 3 45 on the adsorption structure 4 to face vertically downwards, and the suction cup 3 45 will grab the nut downwards. The push rod of the drive cylinder 72 extends, which will cause the drive roller 721 to move to the left and away from the drive cylinder 72. The drive roller 721 will push the lifting plate 75 upward through the lifting slide 76, thereby causing the entire drive plate 71 to move upward in a straight line along the guide post 73. The upward movement of the drive plate 71 will cause the expansion roller 74 on the drive plate 71 to move upward synchronously, thereby causing the expansion roller 74 to move upward along the moving inclined groove 831. During this process, the expansion roller 74 will be centered and positioned. Multiple expansion rods 81 in structure 8 unfold synchronously. When the expansion roller 74 is at the intersection of the holding groove 832 and the moving inclined groove 831, the three expansion rods 81 in the center positioning structure 8 contact the inner wall of the nut and clamp it, so that the nut is in the center above the through hole 622 and can be fixed to prevent it from shifting due to shaking. This allows it to be accurately adsorbed at the center of the suction cup 45, so that when it is subsequently inserted into the injection mold, it can be accurately inserted into the required position, thus improving the insertion accuracy.

[0031] The drive plate 71 then continues to move upward, the expansion roller 74 moves upward within the holding groove 832, and the position of the expansion rod 81 remains unchanged. The drive plate 71 will push the pressure sensor 91 to move upward. Since the nut above is clamped and fixed by multiple expansion rods 81, the pressure plate 92 is blocked by the nut and cannot move upward. During the upward movement of the pressure sensor 91, the upward movement of the pressure sensor 91 causes the support spring 932 to be squeezed and compressed. At the same time, the pressure plate 92 will also approach the pressure sensor 91 and make contact with the pressure sensor 91 to generate a pressure value. This pressure value is greater than the set threshold, thus determining that there is a nut above and the nut can be gripped normally. If the pressure value is less than the set threshold, it will be determined that there is no nut above, and an alarm will be triggered to alert nearby personnel.

[0032] After the nut is grasped, the flipping structure 33 makes the suction cup 44 on the adsorption structure 4 face vertically downward. The suction cup 44 will move into the diaphragm magazine 5 to grasp the diaphragm above. Then, under the action of the horizontal module 3, the vertical module 31, and the vertical module 32, the adsorption structure 4 can embed the adsorbed nuts and diaphragms into the corresponding positions in the injection mold.

[0033] In existing technologies, some robotic arms directly grab nuts from the feeding channel of the vibrating material tray 2 using suction cups. To ensure that the nuts on the feeding channel can be arranged smoothly and orderly, the size of the feeding channel is larger than the size of the nuts. As a result, when the suction cup grabs the nuts, it cannot guarantee that the nuts are centered on the suction cup, resulting in a certain error. Consequently, when placing the nuts into the injection mold, the embedding accuracy cannot be guaranteed. We set up a fixture 6 for transfer. After the nuts are grabbed by the suction cup, they are placed above the fixture 6 and centered by the centering positioning structure 8. When the suction cup grabs them again, it can ensure that the nuts are centered below the suction cup, thereby ensuring the embedding accuracy.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A material feeding platform for injection molding of inserts in a two-color injection mold, characterized in that, The device includes a base (1), a vibrating tray (2) for arranging nut insert arrays is installed on the upper right half of the base (1), and a diaphragm cartridge (5) for storing diaphragm inserts. A horizontal module (3) is fixed above the base (1) by a bracket. A vertical module (31) is installed on the slider of the horizontal module (3). A vertical module (32) is installed on the slider of the vertical module (31). A flipping structure (33) is fixed on the slider of the vertical module (32). An adsorption structure (4) for gripping inserts is installed on the flipping structure (33). A fixture (6) is fixed on the base (1). Multiple centering positioning structures (8) for nuts are evenly distributed on the fixture (6). A detection structure (9) for detecting nuts above the fixture (6) is sleeved on each centering positioning structure (8). A driving structure (7) is installed on the fixture (6). The driving structure (7) is slidably connected to the centering positioning structure (8). The fixture (6) includes a fixed seat (61) fixed above the base (1). An upper template (62) is suspended on the fixed seat (61) by a support column. The upper template (62) has multiple evenly distributed embedding slots (621). The bottom end of the embedding slot (621) is downward to form a through hole (622). A central positioning structure (8) is installed in each through hole (622). The drive structure (7) includes four guide columns (73) fixed between the fixed seat (61) and the upper template (62). The four guide columns (73) are slidably sleeved with a drive plate (71). A lifting plate (75) is fixed at the bottom of the drive plate (71). An inclined lifting groove (76) is provided on the lifting plate (75). A drive cylinder (72) is fixed on the right side of the fixed seat (61) by a bracket. A drive roller (721) is installed on the push rod of the drive cylinder (72). The drive roller (721) is rolled into the lifting groove (76). The centering positioning structure (8) includes three linear slide blocks (82) arranged in a circular array. The linear slide blocks (82) are slidably installed below the upper template (62). Each linear slide block (82) is fixed with an expansion rod (81). The three expansion rods (81) pass through the through-hole (622) and the embedding groove (621) and are placed above the upper template (62). An expansion groove (83) is opened on the linear slide block (82). An expansion roller (74) is rotatably installed above the drive plate (71) through a bracket. The expansion roller (74) is slidably inserted into the expansion groove (83). The expansion groove (83) includes a vertically arranged retaining groove (832). The bottom end of the retaining groove (832) is provided with an inclined moving groove (831). In the initial state, the expansion roller (74) is located at the bottom of the moving groove (831). At this time, the distance between the three expansion rods (81) in the center positioning structure (8) is the closest. When the expansion roller (74) is at the intersection of the retaining groove (832) and the moving groove (831), the distance between the three expansion rods (81) is the farthest.

2. The material feeding platform for injection molding of in-mold inserts in two-color injection molding according to claim 1, characterized in that, The flipping structure (33) includes a fixed frame (331) fixed on the slider of the vertical module (32). The lower end of the fixed frame (331) is rotatably mounted with a flipping frame (333) via a rotating shaft. A flipping cylinder (332) is also rotatably mounted on the fixed frame (331) via a shaft pin. The push rod of the flipping cylinder (332) is rotatably connected to the flipping frame (333) via a shaft pin.

3. The material feeding platform for injection molding of in-mold inserts in two-color injection molding according to claim 2, characterized in that, The adsorption structure (4) includes an electric rotating platform (41) fixed below the flipping frame (333) by a bracket. A square mounting frame (42) is fixed on the rotating platform of the electric rotating platform (41). Multiple suction cups one (43), two (44) and three (45) are respectively installed on the three sides of the mounting frame (42).

4. The material feeding platform for injection molding of in-mold inserts in two-color injection molding according to claim 1, characterized in that, The linear slide block (82) has an inverted L-shaped structure. A guide groove (822) is provided on the linear slide block (822). A guide block (821) is slidably inserted into the guide groove (822). The guide block (821) is fixed to the lower surface of the upper template (62) by screws.

5. The material feeding platform for injection molding of in-mold inserts in two-color injection molding according to claim 1, characterized in that, The detection structure (9) includes a pressure sensor (91) that slides up and down into the embedded groove (621). The bottom end of the pressure sensor (91) is fixed with a plurality of lifting columns (94) arranged in a ring array. The lifting columns (94) pass through the upper template (62) and are placed below the upper template (62). The housing of the pressure sensor (91) is provided with three lifting grooves arranged in a ring array. A support structure (93) is installed in the lifting groove. A pressure plate (92) is fixed at the top of the three support structures (93).

6. The material feeding platform for injection molding of in-mold inserts in two-color injection molding according to claim 5, characterized in that, The support structure (93) includes a support rod (931) that slides vertically into the lifting groove. A support spring (932) is placed in the lifting groove. The upper and lower ends of the support spring (932) abut against the bottom end of the support rod (931) and the bottom end of the lifting groove, respectively.

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