Pin feed mechanism

Abstract

The utility model provides a kind of pin feeding mechanism, including mechanical arm, receiving assembly, connecting plate and adsorption assembly, the output end of mechanical arm is connected with the side of connecting plate, receiving assembly and adsorption assembly are respectively arranged in the both sides of connecting plate, the receiving assembly is used to be inserted into injection mold cavity under the driving of the mechanical arm with received pin, the adsorption assembly is used to suck the pin that has been injection molded when the mechanical arm retreats.The utility model discloses a kind of pin feeding mechanism, single stroke can complete pin feeding and finished product pick simultaneously, and the yield is higher.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and more specifically, to a pin feeding mechanism. Background Technology

[0002] Chargers are ubiquitous in people's daily lives, becoming an indispensable consumer product. Chargers are manufactured using injection molding. Specifically, a robotic arm first inserts the charger's prongs into an injection mold, and then the mold performs injection molding to cover the prongs with a casing, thus forming the charger.

[0003] In current injection molding production, inserts are typically produced using a robotic arm that individually picks up the material and feeds it into the injection molding machine. After injection, another robotic arm, or the same robotic arm, re-enters the mold cavity to remove the finished product. This method has the following drawbacks: the material loading and unloading must be done in separate steps, resulting in a long overall cycle time and low production efficiency; when the robotic arm re-enters the mold cavity to pick up the material, it still needs to be repositioned, which not only prolongs the molding cycle but also easily interferes with the mold or residual plastic debris, leading to loose inserts, scratches on the outer shell, or even damage to the precision core, increasing maintenance costs and scrap rates. Utility Model Content

[0004] The purpose of this utility model is to provide a pin feeding mechanism that can simultaneously complete pin feeding and finished product picking in a single stroke, resulting in a higher yield rate.

[0005] The technical solution adopted by the pin feeding mechanism disclosed in this utility model is:

[0006] A pin feeding mechanism includes a robotic arm, a receiving component, a connecting plate, and an adsorption component. One side of the connecting plate is connected to the output end of the robotic arm. The receiving component and the adsorption component are respectively disposed on both sides of the connecting plate. The receiving component is used to insert the received pin into the injection mold cavity under the drive of the robotic arm. The adsorption component is used to pick up the already injection molded pin when the robotic arm retracts.

[0007] As a preferred embodiment, the receiving component includes a positioning plate and an ejector module. The positioning plate is provided with at least one insertion protrusion for receiving the pin. The ejector module includes an ejector plate, a driving member, and an ejector pin. One end of the ejector pin is fixed to the ejector plate. The driving member drives the ejector plate to slide between the positioning plate and the connecting plate. The ejector pin is used to eject the pin placed on the insertion protrusion and insert it into the injection mold cavity.

[0008] As a preferred embodiment, the insertion protrusion is provided with a socket that matches the shape of the pin, and the positioning plate is provided with a positioning opening that communicates with the socket. The ejector pin can pass through the positioning opening and extend into the socket under the drive of the driving component.

[0009] As a preferred embodiment, the ejector pin includes a head and a rod. The ejector plate is provided with a fixing hole. The head of the ejector pin is fixedly installed on the fixing hole. The rod is clearance-fitted with the positioning opening. When the driving component drives, the rod can slide through the positioning opening and push the pin out of the insertion protrusion.

[0010] As a preferred embodiment, the positioning plate has several mounting holes on one side, and a positioning post is fixedly installed in the mounting hole. The positioning post and the external fixture form a detachable positioning fit.

[0011] As a preferred embodiment, a return cylinder is provided on the other side of the positioning plate. The cylinder body of the return cylinder is fixed on the positioning plate. The piston rod of the return cylinder faces the ejector plate and there is a gap between them. When the ejector plate completes the ejection of the pin under the action of the driving component, the piston rod extends and abuts against the ejector plate.

[0012] As a preferred embodiment, the ejector module is further provided with an optical axis and a linear bearing. The optical axis is fixed between the connecting plate and the positioning plate, and the linear bearing is fixed to the ejector plate and slides with the optical axis.

[0013] As a preferred embodiment, the adsorption assembly includes a spring telescopic rod and a suction nozzle, with one end of the spring telescopic rod fixed to a connecting plate and the other end connected to the suction nozzle.

[0014] As a preferred embodiment, the central axis of the suction nozzle is coaxial with the central axis of the pin on the insertion protrusion.

[0015] As a preferred embodiment, the device also includes a shearing assembly, which includes a cutter and a cutter drive. The cutter drive is fixed to the connecting plate and drives the cutter to cut the strip connecting adjacent pins.

[0016] The beneficial effects of the pin feeding mechanism disclosed in this utility model are as follows: by flipping the connecting plate with the robotic arm, pin feeding and pin picking can be combined into the same stroke. When the connecting plate is perpendicular to the robotic arm, the insertion protrusion faces upward and can be used to receive the pin. When the connecting plate is flipped 90°, the insertion protrusion faces the mold cavity, and the ejector module immediately pushes the pin into the mold cavity for injection molding. At the same time, the adsorption component on the back is used to adsorb the pins that have been completed in the previous injection molding. Pin feeding and finished product picking can be completed in a single stroke, thereby eliminating the traditional secondary cavity entry and picking operation, shortening the cycle time, completely eliminating the risk of repeated positioning errors and interference, and effectively improving the yield rate. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the pin feeding mechanism of this utility model.

[0018] Figure 2This is a schematic diagram of the injection molding operation of the pin feeding mechanism of this utility model.

[0019] Figure 3 This is a schematic diagram of the positioning plate in the pin feeding mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the ejector plate and ejector pin in the pin feeding mechanism of this utility model.

[0021] Figure 5 This is an exploded view of the pin feeding mechanism of this utility model.

[0022] Figure 6 This is an exploded view of the pin feeding mechanism of this utility model under another state.

[0023] Figure 7 This is a schematic diagram of the insertion protrusion in the insertion feeding mechanism of this utility model. Detailed Implementation

[0024] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0025] like Figure 1 and Figure 2 As shown, a pin feeding mechanism includes a robotic arm 10, a receiving component 20, a connecting plate 30, and an adsorption component 40. The output end of the robotic arm 10 is connected to one side of the connecting plate 30, and the receiving component 20 and the adsorption component 40 are respectively disposed on both sides of the connecting plate 30.

[0026] In the initial state, the connecting plate 30 is arranged horizontally, with the receiving component 20 above it, responsible for receiving the externally supplied pins. The suction component 40 faces downwards, ready to retrieve the pins that have been injected. When the robotic arm 10 enters the injection molding machine and rotates 90° around its own axis, the connecting plate 30 is set vertically, the receiving component 20 turns to face right, directly facing the mold gate, and the suction component 40 turns to face left, which can be used to pick up the pins that have been formed in the previous mold. Then the robotic arm 10 moves towards the mold gate, and the receiving component 20 injects the pins into the mold cavity. After the pins are injected, the robotic arm 10 then retracts in the mold draft direction, and the suction component 40 pulls out the pins that have been injected in the previous batch, completing the part retrieval operation. The feeding and retrieval operations can be realized in one round trip.

[0027] Furthermore, the side wall of the robotic arm 10 is hinged with a telescopic cylinder. The cylinder end of the telescopic cylinder is hinged to the robotic arm 10. The output end of the telescopic cylinder is hinged with a movable plate. The movable plate and the connecting plate 30 are fixedly connected by bolts. The piston rod extends and retracts to drive the movable plate to swing, thereby causing the connecting plate 30 to flip, so as to realize the angle switching between the pin receiving position and the pin feeding position.

[0028] Please refer to Figure 5 , Figure 6 and Figure 7 The receiving component 20 includes a positioning plate 21 and an ejector module 22. One side of the positioning plate 21 is provided with at least one insertion protrusion 23 for receiving pins. The number of insertion protrusions 23 can be increased according to actual needs to receive multiple pins at the same time. The positioning plate 21 is provided with positioning openings 211 that correspond one-to-one with the insertion protrusions 23. The insertion protrusions 23 are embedded in the positioning openings 211. The insertion protrusions 23 are provided with insertion holes 231 that match the shape of the pins. The insertion holes 231 are connected to the positioning openings 211 and are used to receive externally placed pins.

[0029] Please refer to Figure 2 and Figure 3 The positioning plate 21 has several mounting holes 212 on one side. A positioning post 24 is fixedly installed in the mounting hole 212. The positioning post 24 forms a detachable positioning fit with the external fixture. The positioning post 24 has a tapered guide section. When inserted into the fixture, it automatically centers, eliminating the need to recalibrate the coordinates, thus making the production efficiency higher.

[0030] Please refer to Figure 5 and Figure 6 The ejector module 22 includes an ejector plate 221, a drive member, and an ejector pin 223. The drive member is mounted on the positioning plate 21 and is used to drive the ejector plate 221 to slide between the positioning plate 21 and the connecting plate 30. The ejector pin 223 is used to eject the pins placed on the insertion protrusion 23 and insert them into the injection mold cavity.

[0031] Preferably, the driving component is a pneumatic cylinder or an electric cylinder, and its output end is fixedly connected to the ejector plate 221 to provide a stable and reliable linear driving force.

[0032] Please refer to Figure 4 The ejector pin 223 includes a head 231 and a rod 232. The ejector plate 221 is provided with a fixing hole 2211. The head 231 of the ejector pin 223 is fixed in the fixing hole 2211 by threaded connection or riveting. When the driving component is driven, the rod 232 can slide through the positioning opening 211.

[0033] The outer diameter of the rod 232 is smaller than the inner diameter of the insertion hole 231, and it is clearance-fitted with the positioning opening 211, so that the rod 232 can slide axially without contact within the insertion hole 231. When the ejector plate 221 approaches the positioning plate 21 under the action of the driving component, the top end of the rod 232 extends into the insertion hole 231 and ejects the pins that have been received in the insertion hole 231 in the vertical direction, so as to achieve accurate feeding of the pins into the injection molding machine for injection molding operation.

[0034] Furthermore, the number of ejector pins 223 corresponds one-to-one with the number of insertion holes 231, ensuring that multiple sets of insertion pins can be ejected simultaneously in each action, thus improving feeding efficiency. In this embodiment, the insertion protrusion 23 is provided with two insertion holes 231, corresponding to the positive and negative pins of the insertion pins, respectively. The center distance of the insertion holes 231 is consistent with the installation spacing of the positive and negative pins in the housing to be injected, ensuring that the positive and negative pins are ejected simultaneously and accurately fall into the corresponding cores in the mold cavity, achieving one-time precise insert injection molding.

[0035] A return cylinder 25 is provided on one side of the positioning plate 21. The cylinder body of the return cylinder 25 is fixed on the positioning plate 21. The piston rod of the return cylinder 25 faces the ejector plate 221 and leaves a gap between them. When the ejector plate 221 completes the ejection of the pin under the action of the driving component, the piston rod extends and abuts against the ejector plate 221 to push the ejector plate 221 back to the initial position. The ejector pin 223 retracts from the insertion hole 231 simultaneously. The reset is rapid and without additional driving, ensuring accurate material reception in the next cycle.

[0036] Preferably, a buffer pad is provided between the piston rod of the return cylinder 25 and the ejector plate 221 to absorb the residual kinetic energy at the end of the return and play a certain buffering role.

[0037] In another embodiment, two tension springs are added between the ejector plate 221 and the positioning plate 21. One end of the tension spring is set on the ejector plate 221, and the other end is set on the positioning plate 21. When the driving component drives the ejector plate 221 to move, the tension spring is compressed. When the driving component loses power or is depressurized, the tension spring releases pressure and pushes the ejector plate 221 back to its initial position. The ejector pin 223 simultaneously exits the insertion hole 231, achieving rapid reset without additional power. This solution eliminates the need for the return cylinder 25 and its air passage, resulting in a simple structure and low cost.

[0038] The ejector module 22 is also provided with an optical axis 222 and a linear bearing 224. The optical axis 222 is fixed between the connecting plate 30 and the positioning plate 21 to form a rigid guide rail. The linear bearing 224 is fixed to the ejector plate 221 and slides with the optical axis 222. The inner ring of the linear bearing 224 slides with the optical axis 222, and the outer ring is press-fitted into the bearing seat hole on the ejector plate 221. Under the constraint of the linear bearing 224, the ejector plate 221 moves linearly along the optical axis 222 without clearance, completely eliminating lateral swaying, ensuring that the ejector pin 223 and the insertion hole 231 are coaxial, and improving ejection accuracy and service life.

[0039] Preferably, the linear bearing 224 is provided with embedded dustproof rings on both ends to prevent machining debris or dust from entering the bearing raceway and maintain long-term low-friction operation.

[0040] On the other side of the connecting plate 30, there is an adsorption assembly 40. The adsorption assembly 40 includes a spring telescopic rod 41 and a suction nozzle 42. One end of the spring telescopic rod 41 is fixed to the connecting plate 30, and the other end is connected to the suction nozzle 42. The spring telescopic rod 41 is a hollow structure with a through-hole forming a vacuum channel. The end of the spring telescopic rod 41 near the connecting plate 30 is sealed to the outlet of the vacuum valve through a rotary joint. The inlet of the vacuum valve is connected to an external vacuum source through a hose to provide continuous and stable negative pressure. The spring telescopic rod 41 can provide an elastic stroke of 5-15mm to ensure that the suction nozzle 42 reliably fits the injection-molded pin surface and is firmly adsorbed.

[0041] The central axis of the suction nozzle 42 is coaxial with the central axis of the pin on the insertion protrusion 23, ensuring that it accurately corresponds to the mold cavity finished product after flipping. The ejection and suction operations can be completed in one flip without additional adjustment.

[0042] A pin feeding mechanism further includes a shearing component 50, which includes a cutter and a cutter drive. The cutter drive is fixed on the connecting plate 30 and drives the cutter to cut the strip connecting adjacent pins, preventing the strip from entering the mold cavity with the pins, ensuring that the injection cavity is clean and the finished product is free of residue. The cutting action is synchronized with the flipping cycle and does not occupy additional cycle time.

[0043] When in use, the robotic arm 10 is started first. The connecting plate 30 is initially set horizontally, and the receiving component 20 faces upward. The external feeding mechanism can insert the pins to be injected into the two insertion holes 231 of the insertion protrusion 23 respectively. The pins are accurately positioned, and the feeding preparation is completed. Then the telescopic cylinder retracts, and the connecting plate 30 is rotated 90° by the movable plate. The connecting plate 30 changes from horizontal to vertical, so that the receiving component 20 can be aligned with the mold gate, and the adsorption component 40 is directly facing the already injected pins in the mold cavity.

[0044] After the robotic arm 10 moves into position towards the mold gate, the drive unit of the ejector module 22 immediately starts, and the ejector pins 223 simultaneously push the positive and negative pins into the mold cavity for injection molding. Then, after the drive unit stops providing power, the piston rod of the return cylinder 25 extends, pushing the ejector plate 221 back to its initial position, and the ejector pins 223 withdraw from the insertion hole 231, ready for the next material receiving. Immediately afterwards, the robotic arm 10 moves backward, the spring extension rod 41 of the adsorption component 40 is compressed and retracts, and the suction nozzle 42 closely adheres to the surface of the finished product, firmly adhering to the pins that have been injected in the previous mold and carrying them away from the mold cavity, completing the part removal. The pin feeding and finished part removal operations can be completed simultaneously in a single stroke, thus eliminating the traditional secondary cavity entry and part removal operation, shortening the cycle time, completely eliminating the risk of repeated positioning errors and interference, and effectively improving the yield rate.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A pin-feeding mechanism, characterized in that, The device includes a robotic arm, a receiving component, a connecting plate, and an adsorption component. One side of the connecting plate is connected to the output end of the robotic arm. The receiving component and the adsorption component are respectively disposed on both sides of the connecting plate. The receiving component is used to insert the received pins into the injection mold cavity under the drive of the robotic arm. The adsorption component is used to pick up the pins that have been injected when the robotic arm retracts.

2. The pin feeding mechanism as described in claim 1, characterized in that, The receiving assembly includes a positioning plate and an ejector module. The positioning plate is provided with at least one insertion protrusion for receiving the pin. The ejector module includes an ejector plate, a driving member, and an ejector pin. One end of the ejector pin is fixed to the ejector plate. The driving member drives the ejector plate to slide between the positioning plate and the connecting plate. The ejector pin is used to eject the pin placed on the insertion protrusion and insert it into the injection mold cavity.

3. The pin feeding mechanism as described in claim 2, characterized in that, The insertion protrusion is provided with a insertion hole that matches the shape of the insertion pin. The positioning plate is provided with a positioning opening that communicates with the insertion hole. The ejector pin can pass through the positioning opening and extend into the insertion hole under the drive of the driving component.

4. The pin feeding mechanism as described in claim 3, characterized in that, The ejector pin includes a head and a rod. The ejector plate has a fixing hole. The head of the ejector pin is fixedly installed on the fixing hole. The rod is clearance-fitted with the positioning opening. When the driving component drives, the rod can slide through the positioning opening and push the pin out of the insertion protrusion.

5. The pin feeding mechanism as described in claim 2, characterized in that, The positioning plate has several mounting holes on one side, and a positioning post is fixedly installed in the mounting hole. The positioning post and the external fixture form a detachable positioning fit.

6. The pin feeding mechanism as described in claim 5, characterized in that, A return cylinder is provided on the other side of the positioning plate. The cylinder body of the return cylinder is fixed on the positioning plate. The piston rod of the return cylinder faces the ejector plate and there is a gap between them. When the ejector plate completes the ejection of the pin under the action of the driving component, the piston rod extends and abuts against the ejector plate.

7. The pin feeding mechanism as described in claim 2, characterized in that, The ejector module is also equipped with an optical axis and a linear bearing. The optical axis is fixed between the connecting plate and the positioning plate, and the linear bearing is fixed to the ejector plate and slides with the optical axis.

8. The pin feeding mechanism as described in claim 2, characterized in that, The adsorption assembly includes a spring telescopic rod and a suction nozzle. One end of the spring telescopic rod is fixed to a connecting plate, and the other end is connected to the suction nozzle.

9. The pin feeding mechanism as described in claim 8, characterized in that, The central axis of the suction nozzle is coaxial with the central axis of the pin on the insertion protrusion.

10. The pin feeding mechanism as described in claim 1, characterized in that, It also includes a shearing assembly, which includes a cutter and a cutter drive, the cutter drive being fixed to the connecting plate and driving the cutter to cut the strip connecting adjacent pins.

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