A kind of auxiliary blanking mechanism for continuous pull belt insert injection molding

Abstract

The application discloses an auxiliary material falling mechanism for continuous pull strip insert injection molding, and belongs to the technical field of insert injection molding. The auxiliary material falling mechanism comprises a connecting base and a guide air cylinder installed on the connecting base. The telescopic end of the guide air cylinder is connected with a supporting horizontal plate, the upper end of the supporting horizontal plate is fixed with a linear guide rail, the slider on the linear guide rail is installed at the end of a mechanical arm, the end of the mechanical arm away from the slider is fixed with a positioning pressure head, the positioning pressure head is installed with a pressure applying unit, the pressure applying unit is used for pressing a metal patch into a cavity of an injection mold, and the pressure applying unit is installed with a flexible piece at the contact end of the metal patch. The auxiliary material falling mechanism for continuous pull strip insert injection molding is provided with the flexible piece on the pressing block, the flexible piece is deformed to buffer the metal piece, when there is foreign matter in the cavity, the pressing part on the pressing block can be moved under resistance, and the foreign matter in the cavity is detected through the movement of the pressing part.

Description

Technical Field

[0001] This invention relates to the field of insert injection molding technology, specifically to an auxiliary blanking mechanism for continuous tape insert injection molding. Background Technology

[0002] Insert injection molding is a process in which metal inserts are pre-fixed in a mold and then injected with plastic to form a single piece. In high-precision manufacturing fields such as electronics and automotive parts, in order to achieve automated continuous production, a "continuous conveyor belt" method is often used to transport metal inserts. Multiple miniature, thin-walled metal patches are pre-placed at equal intervals on a strip of material, and then gradually fed into the mold cavity by a feeding mechanism. They are then punched or peeled off by ejector pins or auxiliary mechanisms and fall into the cavity, followed by mold closing and injection molding.

[0003] For example, CN213291097U discloses a robotic jig for insert injection molding, comprising an insertion assembly for inserting the insert into the front mold and a gripper assembly for removing the product from the rear mold. The insertion assembly includes a push plate and a support plate. The support plate is sequentially provided with a first connecting post, a first guide post, a second guide post, and a second connecting post. The push plate is sleeved on the connecting post and the guide post, and each of the two connecting posts is sleeved with a push tube. An electric suction cup is also installed on the front of the support plate, and an ejection cylinder is installed on the back of the support plate corresponding to the center of the push plate. The gripper assembly includes a fixed plate, a pair of finger cylinders, and a gripper pressure plate fixed to the two movable ends of the finger cylinders. The back of the support plate is threadedly connected to the back of the fixed plate by several connecting rods.

[0004] The existing technology has the following technical problems: When performing insert injection molding, existing jigs use corresponding robotic arms to facilitate the placement of metal parts into the cavity. However, when the robotic arms press the metal parts in, it is not convenient to detect whether there are any foreign objects on the metal parts on the pull strap or in the cavity. When the metal parts on the pull strap are missing, the cavity will be in an unloaded state when pressing the metal parts in later. At the same time, when the injection mold works for a long time, some debris will remain inside the cavity. When the metal parts are forcibly pressed into the cavity, they are prone to deformation due to blockage by foreign objects, which will lead to a higher defect rate of the subsequently molded products.

[0005] Therefore, we propose an auxiliary blanking mechanism for continuous tape insert injection molding to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an auxiliary blanking mechanism for continuous pull-belt insert injection molding, to solve the problems mentioned in the background art. Currently available jigs for insert injection molding use robotic arms to facilitate the placement of metal parts into the cavity. However, when pressing the metal parts in, the robotic arms cannot easily detect the presence of metal parts on the pull belt or foreign objects in the cavity. When a metal part is missing from the pull belt, the cavity is left unloaded during subsequent pressing. Furthermore, during prolonged operation, some debris remains inside the cavity. When the metal part is forcibly pressed into the cavity, it is prone to deformation due to blockage by foreign objects, leading to a higher defect rate in subsequent molded products.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary blanking mechanism for continuous strip insert injection molding, comprising a connecting base and a guide cylinder mounted on the connecting base. The telescopic end of the guide cylinder is connected to a supporting horizontal plate, and a linear guide rail is fixed to the upper end of the supporting horizontal plate. A slider on the linear guide rail is mounted to the end of a robotic arm, and a positioning pressure head is fixed to the end of the robotic arm away from the slider. A pressure applying unit is mounted on the positioning pressure head, and the pressure applying unit is used to press the metal strip into the cavity of the injection mold. In the middle, a flexible component is installed at the contact end between the pressure unit and the metal patch. The flexible component is connected to the internal cavity of the pressure unit through an air supply pipe. A first pressure sensor is installed in the internal cavity of the pressure unit. The flexible component is used to apply pressure and buffer the metal patch and to detect missing parts on the pull strip. A movable block is fixed at the upper end of the pressure unit, and a magnetically controlled avoidance detection component is provided at the upper end of the movable block. The magnetically controlled avoidance detection component is used to detect foreign object blockage in the cavity. At the same time, when foreign object blockage occurs in the cavity, the pressure unit retracts to avoid it.

[0008] Preferably, the bottom of the supporting horizontal plate is provided with multiple guide posts, and the lower guide posts of the supporting horizontal plate can slide on the connecting base.

[0009] By adopting the above technical solution, the stability of the support plate during movement can be ensured by sliding the bottom guide post of the support plate on the connecting base.

[0010] Preferably, the positioning pressure head has multiple pressure units evenly distributed, and each pressure unit has a flexible component installed at the end that contacts the metal patch.

[0011] By adopting the above technical solution, multiple pressure units are set on the positioning pressure head, so that multiple metal patches can be operated simultaneously when assisting in the blanking of metal patches. At the same time, the flexible parts at the bottom of the pressure unit can play a buffering role when applying pressure to the metal patches.

[0012] Preferably, the flexible component at the bottom of the pressure unit is made of fluorosilicone material, and the interior of the flexible component is a hollow structure, so that the airflow inside the flexible component can enter the cavity inside the pressure unit through the air supply pipe after being compressed.

[0013] By adopting the above technical solution, when a part is missing from the pull belt, the pressure unit moves down and does not deform due to compression with the metal patch, and the value of the first pressure sensor does not change, thereby detecting whether a part is missing from the pull belt.

[0014] Preferably, the pressure application unit and the movable block are slidable along the vertical direction of the positioning pressure head, and the movable block is connected to the positioning pressure head through a metal spring.

[0015] By adopting the above technical solution, when foreign objects inside the cavity cause the metal patch to be obstructed, the resistance increases after the pressure unit moves down, and the moving block and the pressure unit move up.

[0016] Preferably, the magnetically controlled obstacle avoidance detection component includes a first magnetic block fixed to the upper side of the movable block, and a top pressure block is installed at the upper middle of the movable block. A second magnetic block is fixed inside the positioning pressure head above the first magnetic block, and a second pressure sensor is fixed inside the positioning pressure head above the top pressure block. The magnetic properties of the opposite surfaces of the second magnetic block and the first magnetic block are opposite.

[0017] By adopting the above technical solution, when the movable block moves upward, the first magnetic block and the second magnetic block approach each other, and the second magnetic block generates a magnetic attraction force on the first magnetic block, causing its pressure unit to move further upward, and the top pressure block applies pressure to the second pressure sensor. The pressure signal detected by the second pressure sensor is used to determine whether there are foreign objects in the cavity.

[0018] Preferably, the movable block is provided with a limiting plug-in component on its side. The limiting plug-in component is used to limit the movable block and the pressure unit after retraction and avoidance, and each movable block is provided with a limiting plug-in component on its side.

[0019] By adopting the above technical solution, when the movable block and the pressure unit move upward, the limiting plug-in component can prevent the pressure unit and the movable block from resetting.

[0020] Preferably, the limiting insertion component includes a limiting crossbar installed on the positioning pressure head, and the limiting crossbar is connected to the positioning pressure head through an auxiliary spring, and the movable block has a guide groove on the side facing the limiting crossbar.

[0021] By adopting the above technical solution, the limiting crossbar can be inserted into the guide groove on the side of the movable block by the restoring force of the auxiliary spring.

[0022] Preferably, the longitudinal section of the limiting crossbar near the movable block is set as a right-angled trapezoidal structure, and the outer wall of the limiting crossbar near the movable block and the inner wall of the guide groove on the movable block fit together. The limiting crossbar forms an elastic telescopic structure through an auxiliary spring and a positioning pressure head.

[0023] By adopting the above technical solution, the outer wall of the end of the limiting crossbar and the inner wall of the guide groove fit together, thereby improving the stability of the limiting crossbar when inserted into the guide groove.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the auxiliary blanking mechanism for continuous tape insert injection molding, by setting a flexible part on the pressure block, uses the deformation of the flexible part to buffer the metal part, and at the same time, when there are foreign objects in the cavity, the pressure part on the pressure block can be resisted and moved, and the movement of the pressure part is used to detect foreign objects in the cavity.

[0025] 1. The guide cylinder controls the support plate to move downward, thereby using the pressure unit on the positioning head at the end of the robotic arm to apply pressure to the metal patch, causing the metal patch to fall into the injection mold cavity. At the same time, a flexible component is installed on the pressure unit. The elastic deformation of the flexible component when it comes into contact with the metal patch can play a buffering role. In addition, the flexible component does not compress or deform with the metal patch when the pull strip is missing a part. The change in the value of the first pressure sensor is used to determine whether there is a missing part on the pull strip.

[0026] 2. By moving the pressure unit and the movable block on the positioning pressure head, when there is foreign matter blocking the cavity, the downward pressure resistance of the metal patch increases. After the pressure unit and the movable block move upward, they squeeze the second pressure sensor. The pressure change of the second pressure sensor determines whether the cavity is blocked. At the same time, after the pressure unit and the movable block move upward, the magnetic force can further attract the pressure unit and the movable block upward, causing the pressure unit to retract and avoid further downward movement of the positioning pressure head, which would damage the metal patch. Attached Figure Description

[0027] Figure 1 This is a frontal perspective view of the present invention;

[0028] Figure 2 This is a schematic diagram of the connecting base and guide cylinder structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the robotic arm and positioning pressure head structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the robotic arm and positioning pressure head structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the pressure application unit and flexible component structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the movable block and metal spring sheet structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the first and second magnetic blocks of the present invention;

[0034] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0035] Figure 9 This is a schematic diagram of the movable block and guide groove structure of the present invention.

[0036] In the diagram: 1. Connecting base; 2. Guide cylinder; 3. Supporting horizontal plate; 4. Linear guide rail; 5. Slider; 6. Robotic arm; 7. Positioning pressure head; 8. Pressing unit; 9. Flexible component; 10. Air supply pipe; 11. First pressure sensor; 12. Movable block; 13. First magnetic block; 14. Top pressure block; 15. Second magnetic block; 16. Second pressure sensor; 17. Limiting horizontal bar; 18. Auxiliary spring; 19. Guide groove; 20. Metal spring; 21. Injection mold; 22. Top plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figures 1-9Existing fixtures, when performing insert injection molding, use robotic arms to facilitate the placement of metal parts into the cavity. However, when pressing in the metal parts, the robotic arms cannot easily detect the presence of metal parts on the pull strap or foreign objects in the cavity. If a metal part is missing from the pull strap, the cavity will be in an unloaded state when pressing in the metal part later. Furthermore, during prolonged operation, some debris may remain inside the cavity. When the metal part is forcibly pressed into the cavity, it is prone to deformation due to blockage by foreign objects, leading to a higher defect rate in subsequent molded products. To solve this technical problem, this embodiment discloses the following technical content: a tool for continuous... The auxiliary blanking mechanism for continuous pull-out insert injection molding includes a connecting base 1 and a guide cylinder 2 mounted on the connecting base 1. The telescopic end of the guide cylinder 2 is connected to a support plate 3, and a linear guide rail 4 is fixed to the upper end of the support plate 3. A slider 5 on the linear guide rail 4 is mounted on the end of a robotic arm 6, and a positioning pressure head 7 is fixed to the end of the robotic arm 6 away from the slider 5. A pressure applying unit 8 is mounted on the positioning pressure head 7. The pressure applying unit 8 is used to press the metal patch into the cavity of the injection mold 21, and a flexible element 9 is mounted at the contact end of the pressure applying unit 8 with the metal patch. The flexible element 9 is connected to the internal cavity of the pressure applying unit 8 through an air supply pipe 10, and a first pressure sensor 1 is installed in the internal cavity of the pressure applying unit 8. 1. The flexible component 9 is used for applying pressure and buffering the metal patch and for detecting missing parts on the pull strip. The upper end of the pressure unit 8 is fixed with a movable block 12, and the upper end of the movable block 12 is provided with a magnetically controlled avoidance detection component. The magnetically controlled avoidance detection component is used to detect foreign object blockage in the cavity. At the same time, when foreign object blockage occurs in the cavity, the pressure unit 8 retracts to avoid it. The bottom of the supporting horizontal plate 3 is provided with multiple guide posts, and the lower guide posts of the supporting horizontal plate 3 can slide on the connecting base 1. Multiple pressure units 8 are evenly distributed on the positioning pressure head 7, and a flexible component 9 is installed at the end of each pressure unit 8 that contacts the metal patch. The flexible component 9 at the bottom of the pressure unit 8 is made of fluorosilicone material, and the interior of the flexible component 9 is hollow. The structure allows the airflow inside the flexible component 9 to enter the cavity inside the pressure unit 8 through the air supply pipe 10 after being compressed. The pressure unit 8 and the movable block 12 can slide along the vertical direction of the positioning head 7. The movable block 12 is connected to the positioning head 7 through the metal spring 20. The magnetically controlled avoidance detection component includes a first magnetic block 13 fixed on the upper side of the movable block 12, and a top pressure block 14 is installed in the middle of the upper end of the movable block 12. A second magnetic block 15 is fixed inside the positioning head 7 above the first magnetic block 13, and a second pressure sensor 16 is fixed inside the positioning head 7 above the top pressure block 14. The magnetic properties of the opposite surfaces of the second magnetic block 15 and the first magnetic block 13 are opposite.

[0039] After the injection mold 21 opens, the ejector rod of the injection molding machine pushes out the ejector plate 22, causing the base to move upward. At this time, the guide cylinder 2 pushes the support plate 3 upward. The linear guide rail 4 on the support plate 3 controls the robotic arm 6 to move into the mold. After reaching the cavity of the injection mold 21, the guide cylinder 2 retracts, causing the pressure unit 8 on the positioning head 7 at the end of the robotic arm 6 to contact the metal patch, thereby pressing the metal patch into the cavity of the injection mold 21. Then the ejector plate 22 retracts and resets, the guide cylinder 2 rises again, the robotic arm 6 and the positioning head 7 reset, the injection mold 21 closes and injection is performed, completing one operation.

[0040] When the positioning pressure head 7 moves downward with the robotic arm 6 and applies pressure to the metal patch using the pressure unit 8, the flexible part 9 at the bottom of the pressure unit 8 first contacts the metal patch. The elastic deformation of the flexible part 9 can buffer the metal patch. After the flexible part 9 is pressed, the airflow inside enters the cavity inside the pressure unit 8 through the air supply pipe 10. At this time, as the airflow in the cavity inside the pressure unit 8 increases, the first pressure sensor 11 inside the cavity detects that the pressure value has increased. If there is a missing part on the pull belt, after the pressure unit 8 moves downward, the flexible part 9 will not be squeezed against the metal patch. At this time, the flexible part 9 will not be squeezed, and the pressure value of the first pressure sensor 11 inside the cavity of the pressure unit 8 fluctuates only slightly. Thus, the flexible part 9 not only buffers the metal patch, but also detects whether there is a missing part on the pull belt.

[0041] Meanwhile, when there are foreign objects inside the cavity, they will create resistance to the metal patch. When the pressure unit 8 moves downward to apply pressure to the metal patch, the resistance provided by the foreign objects will cause the metal spring 20 on the side of the movable block 12 at the upper end of the pressure unit 8 to deform. At this time, the first magnetic block 13 and the second magnetic block 15 at the upper end of the movable block 12 will move closer to each other. Using the magnetic attraction between them, the movable block 12 and the pressure unit 8 can move upward under the action of magnetic force, thereby causing the pressure unit 8 to retract and avoid the foreign objects. After the pressure unit 8 and the movable block 12 move upward, the top pressure block 14 on the movable block 12 applies pressure to the second pressure sensor 16. By detecting the pressure change through the second pressure sensor 16, it can be determined whether there are foreign objects in the cavity. The retraction of the pressure unit 8 can prevent the robotic arm 6 from continuing to move downward and causing squeezing damage to the metal patch. At the same time, the retraction of the pressure unit 8 also facilitates the operation space for subsequent workers to clean the foreign objects in the cavity.

[0042] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. To prevent the positioning head 7 from continuing to move downward and causing overpressure damage to the metal patch when there are foreign objects blocking the cavity of the injection mold 21, the following technical content is disclosed in this example: Figures 5-8As shown, a limiting plug-in component is provided on the side of the movable block 12. The limiting plug-in component is used to limit the movable block 12 and the pressure unit 8 after retraction and avoidance. Each movable block 12 is provided with a limiting plug-in component on its side. The limiting plug-in component includes a limiting crossbar 17 installed on the positioning pressure head 7. The limiting crossbar 17 is connected to the positioning pressure head 7 through an auxiliary spring 18. A guide groove 19 is provided on the side of the movable block 12 facing the limiting crossbar 17. The longitudinal section of the limiting crossbar 17 near the movable block 12 is set as a right-angled trapezoidal structure. The outer wall of the limiting crossbar 17 near the movable block 12 and the inner wall of the guide groove 19 on the movable block 12 fit together. The limiting crossbar 17 forms an elastic telescopic structure through the auxiliary spring 18 and the positioning pressure head 7.

[0043] When the pressure unit 8 and the movable block 12 move upward under the action of magnetic force, the guide groove 19 on the side of the movable block 12 also moves upward synchronously. When the guide groove 19 and the limiting crossbar 17 are aligned with each other, the limiting crossbar 17 is reset and springs back under the action of the auxiliary spring 18. After being reset, the limiting crossbar 17 is inserted into the guide groove 19 of the movable block 12, thereby retracting and avoiding the movable block 12 and the pressure unit 8 for limiting. After the workers have cleaned the foreign objects in the cavity, they only need to pull the limiting crossbar 17 to disengage the end of the limiting crossbar 17 from the guide groove 19. After that, the pressure unit 8 is reset and springs back under the action of the metal spring 20, which facilitates the subsequent normal auxiliary pressure and material dropping of the metal patch.

[0044] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0045] 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An auxiliary blanking mechanism for continuous pull-belt insert injection molding, comprising a connecting base (1) and a guide cylinder (2) mounted on the connecting base (1), wherein the telescopic end of the guide cylinder (2) is connected to a support plate (3), and a linear guide rail (4) is fixed to the upper end of the support plate (3), a slider (5) on the linear guide rail (4) is mounted to the end of a robotic arm (6), and a positioning pressure head (7) is fixed to the end of the robotic arm (6) away from the slider (5), characterized in that: The positioning head (7) is equipped with a pressure unit (8), which is used to press the metal patch into the cavity of the injection mold (21). A flexible part (9) is installed at the contact end between the pressure unit (8) and the metal patch. The flexible part (9) is connected to the internal cavity of the pressure unit (8) through the air supply pipe (10). A first pressure sensor (11) is installed in the internal cavity of the pressure unit (8). The flexible part (9) is used to apply pressure and buffer the metal patch and to detect missing parts on the pull strip. A movable block (12) is fixed at the upper end of the pressure unit (8). A magnetically controlled avoidance detection component is provided at the upper end of the movable block (12). The magnetically controlled avoidance detection component is used to detect foreign objects blocking the cavity. At the same time, when foreign objects block the cavity, the pressure unit (8) retracts to avoid them. The pressure unit (8) and the movable block (12) can slide along the vertical direction of the positioning head (7), and the movable block (12) is connected to the positioning head (7) through the metal spring (20); The magnetically controlled obstacle avoidance detection component includes a first magnetic block (13) fixed on the upper side of the movable block (12), and a top pressure block (14) installed in the middle of the upper end of the movable block (12). A second magnetic block (15) fixed inside the positioning pressure head (7) is provided above the first magnetic block (13), and a second pressure sensor (16) fixed inside the positioning pressure head (7) is provided above the top pressure block (14). The magnetic properties of the opposite surfaces of the second magnetic block (15) and the first magnetic block (13) are opposite.

2. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 1, characterized in that: The bottom of the supporting horizontal plate (3) is provided with multiple guide posts, and the lower guide posts of the supporting horizontal plate (3) can slide on the connecting base (1).

3. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 1, characterized in that: The positioning head (7) has multiple pressure units (8) evenly distributed on it, and each pressure unit (8) has a flexible part (9) installed at the end that contacts the metal patch.

4. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 3, characterized in that: The flexible part (9) at the bottom of the pressure unit (8) is made of fluorosilicone material, and the interior of the flexible part (9) is a hollow structure. After being pressed, the airflow inside the flexible part (9) can enter the cavity inside the pressure unit (8) through the air supply pipe (10).

5. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 1, characterized in that: The side of the movable block (12) is provided with a limiting plug-in component. The limiting plug-in component is used to limit the movable block (12) and the pressure unit (8) after retraction and avoidance. Each movable block (12) is provided with a limiting plug-in component on its side.

6. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 5, characterized in that: The limiting plug-in component includes a limiting crossbar (17) installed on the positioning pressure head (7), and the limiting crossbar (17) is connected to the positioning pressure head (7) through an auxiliary spring (18). The movable block (12) has a guide groove (19) on the side facing the limiting crossbar (17).

7. The auxiliary blanking mechanism for continuous tape insert injection molding according to claim 6, characterized in that: The longitudinal section of the limiting crossbar (17) near the movable block (12) is set as a right-angled trapezoidal structure, and the outer wall of the limiting crossbar (17) near the movable block (12) and the inner wall of the guide groove (19) on the movable block (12) fit together. The limiting crossbar (17) forms an elastic telescopic structure through the auxiliary spring (18) and the positioning pressure head (7).

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