A core-pulling device of an injection mold for an LED lamp cup housing

Abstract

The application provides a core-pulling device of an LED lamp cup shell injection mold, which comprises a core-pulling frame, a core-pulling module and a linkage assembly for driving the movement of the core-pulling module. The core-pulling frame is arranged on one side of the lower mold, and a buffer plate is arranged at the connection between the core-pulling frame and the lower mold. The core-pulling module is slidably connected with the core-pulling frame, and the upper mold is connected with the core-pulling module through the linkage assembly. One end of the core-pulling module is provided with a first core, and the first core is in contact with the lower mold and penetrates the injection cavity of the lower mold. The core-pulling frame is provided with a cylinder, the shaft end of the cylinder is provided with a mounting seat, a second core is arranged on the mounting seat, and the mounting seat is extended out through the shaft end of the cylinder to abut against the core-pulling module, so that the second core penetrates the core-pulling module and extends into the injection cavity. The core-pulling frame is provided with a photoelectric sensor for detecting whether the core-pulling module reaches a preset position. The device forms a secondary time-delay core-pulling structure through the cooperation of the photoelectric sensor, the core-pulling module and the mounting seat, solves the problem that the traditional core-pulling device is easy to cause the lamp cup shell to be damaged and stuck in the cavity, guarantees the forming quality and production efficiency of the plastic part, and improves the operation stability of the device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of generating injection molding, more particularly, relates to a core pulling device of an LED lamp cup shell injection mold. BACKGROUND

[0002] In the field of LED lighting, the LED lamp cup shell as a key component of the LED lamp directly affects the heat dissipation performance, optical effect and structural stability of the LED lamp, and the core pulling device of the injection mold is the core mechanism that determines the forming precision and production efficiency of the LED lamp cup shell.

[0003] However, the traditional core pulling device mostly relies on a single core pulling mechanism or synchronous core pulling without delay. If a single core pulling mechanism is used, multiple sets of cores need to be driven at the same time to pull the cores of the lamp cup shell with different special features, which is easy to cause the lamp cup shell to be pulled and deformed due to uneven force on the cores, especially for the areas where the side wall of the lamp cup shell is thin, cracks are easily generated, which seriously affects the product qualification rate. On the other hand, if synchronous core pulling without delay is used, when multiple sets of cores are withdrawn from the injection cavity at the same time, a multi-directional pulling force is formed with the lamp cup shell, which not only increases the demolding resistance of the plastic part, but also may cause the lamp cup shell to be stuck in the injection cavity due to improper core withdrawal sequence, which needs manual intervention to take out, thus reducing the production efficiency and further increasing the risk of damage to the plastic part. SUMMARY

[0004] In order to solve the above technical problems, the application provides a core pulling device of an LED lamp cup shell injection mold to solve the technical problems in the prior art that the traditional core pulling device uses a single core pulling mechanism or synchronous core pulling without delay, which causes the lamp cup shell to be easily pulled and deformed, cracks to appear, and has large demolding resistance, the plastic part is easily stuck in the cavity, and the production efficiency is low.

[0005] The purpose and effect of the core pulling device of the LED lamp cup shell injection mold are achieved by the following specific technical means:

[0006] A core pulling device of an LED lamp cup shell injection mold, comprising a core pulling frame, a core pulling module and a linkage assembly for driving the core pulling module to move, the core pulling frame is installed on one side of the lower mold, and a buffer plate is clamped at the connection between the core pulling frame and the lower mold;

[0007] The core pulling module is slidably connected with the core pulling frame, the upper mold is connected with the core pulling module through the linkage assembly, one end of the core pulling module is provided with a first core, one end of the core pulling module is in contact with the lower mold, and the first core is arranged in the injection cavity of the lower mold;

[0008] The core pulling frame is provided with a cylinder, the cylinder shaft end is provided with a mounting seat, a second core is mounted on the mounting seat, the mounting seat is extended out through the cylinder shaft end to abut against the core pulling module, so that the second core is arranged in the core pulling module and extends into the injection cavity of the lower mold;

[0009] The core pulling frame is provided with a photoelectric sensor for detecting whether the core pulling module moves to a preset core pulling position, and the photoelectric sensor forms a secondary time delay core pulling structure with the movement of the core pulling module and the mounting seat.

[0010] According to a preferred embodiment, the buffer plate comprises a memory alloy fiber woven layer, a foam metal layer and a gel layer, the memory alloy fiber woven layer is in contact with the lower mold, the foam metal layer is located between the memory alloy fiber woven layer and the gel layer, and the three form a sandwich structure;

[0011] The memory alloy fiber woven layer is woven by memory alloy fibers and carbon fiber bundles;

[0012] A plurality of hexagonal honeycomb holes are formed in the foam metal layer, and the honeycomb holes extend from one side of the memory alloy fiber woven layer to the other side of the gel layer;

[0013] The gel layer is made of elastic silica gel, and a plurality of protruding parts matched with the honeycomb holes are integrally formed on one side of the gel layer facing the foam metal layer, the protruding parts are embedded in the corresponding honeycomb holes, and the other side of the gel layer away from the foam metal layer is in contact with the surface of the core pulling frame.

[0014] According to a preferred embodiment, the diameters of the honeycomb holes gradually increase, and the angle of one end of the honeycomb hole close to the memory alloy fiber woven layer is relatively perpendicular to the surface of the buffer plate, and the angle of the other end is inclined to the horizontal direction.

[0015] According to a preferred embodiment, the core pulling module comprises a first movable block and two groups of second movable blocks, the two groups of second movable blocks are symmetrically mounted on the two sides of the first movable block, the core pulling frame is provided with two groups of first sliding rails, one side of the second movable block is provided with a sliding block, and the sliding block is in sliding connection with the first sliding rail;

[0016] The lower mold is further provided with a moving plate, the moving plate is provided with a moving convex strip, the first movable block is provided at the bottom with two groups of limiting blocks to form a limiting groove, the moving convex strip is clamped in the limiting groove, and the first core is mounted on the two groups of second movable blocks;

[0017] The first sliding rail is provided with two groups of limiting pieces, the two groups of limiting pieces are arranged as a moving track, the sliding block is located in the moving track, and one end of the moving track is arranged as a working area and a reset area.

[0018] When the slider moves to the working area, one end of the core-pulling module is in contact with the lower mold, the first core is inserted into the injection cavity of the lower mold, and the photoelectric sensor is installed in the working area;

[0019] When the slider moves to the reset area, the core-pulling module is away from the lower mold, and the first core is withdrawn from the injection cavity, thereby realizing one-time core-pulling operation.

[0020] According to a preferred embodiment, the first movable block is provided with a movable through hole corresponding to the second core, and the first movable block is formed with a movable track through the movable through hole, and the second core is inserted into the movable track and moves along the extension direction of the movable track.

[0021] The second core is provided in a columnar shape, the length of the second core is greater than the length of the movable track, the end of the movable track close to the first core is provided as a working area, and the end away from the first core is provided as a waiting area, and one end of the second core is provided as a working end.

[0022] During use of the device, the slider moves to the working area, the first core is inserted into the injection cavity, the working end of the second core is located in the waiting area, the photoelectric sensor senses the slider, the shaft end of the cylinder is extended, the working end of the second core moves from the waiting area to the working area and is inserted into the injection cavity through the working area.

[0023] According to a preferred embodiment, the twice-delayed core-pulling structure is that, after the injection molding is completed, the shaft end of the cylinder is retracted to restore, the working end of the second core is withdrawn from the injection cavity and moves to the waiting area of the movable track, thereby completing one-time core-pulling operation.

[0024] After the cylinder is restored, the upper mold is lifted upward, and during the lifting process, the upper mold drives the core-pulling module away from the lower mold through the linkage assembly, the first core is withdrawn from the injection cavity, and twice core-pulling operation is completed.

[0025] Through the sequential performance of the core-pulling operation of the first core and the second core, twice-delayed core-pulling is realized.

[0026] According to a preferred embodiment, the linkage assembly comprises a first sealing pipe, one side of the core-pulling frame is provided with a mounting plate, the first sealing pipe is in sliding connection with the mounting plate, an electric lifting rod is arranged on one side of the mounting plate, a connecting plate is arranged on the first sealing pipe, the telescopic end of the electric lifting rod is connected with the connecting plate, and the first sealing pipe is lifted through the electric lifting rod.

[0027] The upper mold is provided with a push frame on one side, and a first push rod is arranged on the push frame, one end of the first push rod is provided with a first sealing block, and the first push rod is arranged in the first sealing pipe, the first sealing pipe is provided with a push part and a liquid adding part, the liquid adding part is located below the push part, the first sealing block is located in the push part, a first sealing cavity for storing hydraulic oil is formed between the first sealing block and the first sealing pipe, and the space size of the first sealing cavity gradually decreases as the first sealing block moves upward.

[0028] The first sealing pipe is provided with a liquid adding pipe and an exhaust port on both sides, the liquid adding pipe is located in the liquid adding part, the exhaust port is close to the top of the first sealing pipe and is connected with an external air extraction structure, and the first sealing pipe is provided with a liquid level sensor and a pressure sensor.

[0029] According to a preferred embodiment, the bottom of the moving plate is provided with a second sealing pipe, and a second push rod is arranged below the moving plate, the second push rod is connected with two groups of second movable blocks respectively, one end of the second push rod is provided with a second sealing block, the second sealing block is arranged in the second sealing pipe, and a second sealing cavity is formed between the second sealing block and the second sealing pipe.

[0030] The first sealing pipe and the second sealing pipe are connected through a connecting pipe, the first sealing cavity and the second sealing cavity are mutually penetrated, the space of the second sealing cavity increases as the space of the first sealing cavity decreases, the second push rod moves outward, and the core pulling module moves away from the lower mold, or vice versa.

[0031] According to a preferred embodiment, the linkage assembly further comprises a linkage rod, one side of the upper mold is provided with a second sliding rail, the first movable block is provided with an inclined block, an angle α is formed between the inclined surface of the inclined block and the plane of the first movable block, and the opening direction of the angle α is toward the lower mold.

[0032] First and second connecting blocks are rotatably arranged at both ends of the linkage rod, the first connecting block is in sliding connection with the second sliding rail, the second connecting block is in sliding connection with the inclined surface of the inclined block, the connecting block is located at the top of the second sliding rail, and the second connecting block is located at the bottom of the inclined surface of the inclined block.

[0033] When the second connecting block moves from the top to the bottom of the second sliding rail, the second connecting block moves from the bottom to the top of the inclined surface of the inclined block.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] Firstly, the present application effectively solves the technical problems of the traditional core pulling device by setting a secondary delay core pulling structure composed of a core pulling module, a cylinder, a second core and a photoelectric sensor. The core pulling module is slidably connected with the core pulling frame and is installed with the first core. The cylinder drives the mounting seat and the second core to move independently. The photoelectric sensor detects whether the core pulling module reaches the preset position to control the action of the cylinder, so that the first core and the second core form a delay operation of sequential core pulling. This structure avoids the uneven stress caused by the single core pulling mechanism driving multiple groups of cores at the same time, prevents the lamp cup shell from being strained, deformed and cracked, avoids the multi-directional pulling force formed by synchronous core pulling without delay, reduces the demolding resistance, avoids the plastic part being stuck in the injection cavity, and ensures the production efficiency.

[0036] Then, the buffer plate between the core pulling frame and the lower mold in the device adopts a sandwich structure of a memory alloy fiber woven layer, a foam metal layer and a gel layer. The memory alloy fiber woven layer enhances the stability of the structure in contact with the lower mold. The hexagonal honeycomb holes of the foam metal layer cooperate with the protruding parts of the gel layer to buffer the vibration impact between the core pulling frame and the lower mold during the core pulling process, reducing the loss of mold parts.

[0037] At the same time, the first sealing pipe and the second sealing pipe in the linkage assembly are connected through the connecting pipe, and the hydraulic oil is used to transmit power to drive the core pulling module to move. The liquid level sensor and the pressure sensor are used to monitor the state of the hydraulic oil to ensure stable power transmission. At the same time, the linkage of the linkage rod, the inclined block and the slide rail further improves the precision of the linkage of the upper mold and the core pulling module, adapts to the core pulling demand of the lamp cup shell in different production scenes, and improves the operation stability and service life of the device as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structure schematic diagram of the present application after assembly;

[0039] Figure 2 is a structure schematic diagram of the present application after disassembly;

[0040] Figure 3 is a structure schematic diagram of the buffer plate after disassembly;

[0041] Figure 4 is a structure schematic diagram of the core pulling module and the moving plate after disassembly;

[0042] Figure 5 is a structure schematic diagram of the moving plate and the second sealing pipe;

[0043] Figure 6 is a structure schematic diagram of the first push rod and the first sealing pipe;

[0044] Figure 7 is a structure schematic diagram of the linkage assembly and the core pulling module;

[0045] Figure 8is a schematic view of the angle a;

[0046] Figure 9 is a principle block diagram of the controller.

[0047] In the figure, the correspondence between the component names and the reference signs is as follows: DETAILED DESCRIPTION

[0048] The embodiments of the present application will be further described below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present application, but cannot be used to limit the protection scope of the present application.

[0049] Embodiment:

[0050] As Figures 1 to 9 shown, the present application provides a core device for LED lamp cup shell injection mold, the core composition includes core pulling frame 11, core pulling module, and linkage assembly for driving the movement of core pulling module. Among them, the core pulling frame 11 as the basic support component of the device is fixedly installed on one side of the lower mold 21, its role is to provide stable installation carrier for core pulling module, cylinder 12 and other components, to ensure that the relative position of each mechanism remains stable during the working process. At the connection between the core pulling frame 11 and the lower mold 21, a buffer plate 31 is clamped, which plays a role in relieving the vibration impact between the core pulling frame 11 and the lower mold 21 during the core pulling process. When the core pulling module moves or the cylinder 12 acts, the device will produce a certain vibration, and the buffer plate 31 can absorb part of the vibration energy, reduce the wear of the core pulling frame 11 and the lower mold 21 due to vibration, and at the same time avoid the transmission of vibration to the injection cavity to affect the forming state of the LED lamp cup shell.

[0051] The core pulling module and the core pulling frame 11 are connected in a sliding manner, which enables the core pulling module to move in the preset direction of the core pulling frame 11, providing a basis for subsequent core pulling action. The upper mold 22 is connected with the core pulling module through the linkage assembly, which can convert the opening and closing action of the upper mold 22 into the moving power of the core pulling module, realizing the action coordination of the upper mold 22 and the core pulling module. One end of the core pulling module is provided with a first core 23, when the device is in the injection preparation state, one end of the core pulling module is in contact with the surface of the lower mold 21, at this time the first core 23 will be inserted into the injection cavity of the lower mold 21. The role of the first core 23 is to form a specific structure (such as a side hole, a boss, etc.) on the LED lamp cup shell during injection, its shape and size are determined according to the design requirements of the LED lamp cup shell, and it is in contact with the molten raw material by embedding into the injection cavity. After the raw material cools and solidifies, it is withdrawn from the plastic part with the movement of the core pulling module, completing the molding and demolding of the corresponding structure.

[0052] On the core-pulling frame 11, a pneumatic cylinder 12 is fixedly arranged as a power component, the shaft end of which is connected with a mounting seat 13, which is used to fix the second core 14 and ensure that the second core 14 will not deviate during movement. The second core 14 is installed on the side of the mounting seat 13 facing the core-pulling module. When the device needs the second core 14 to participate in injection molding, the shaft end of the pneumatic cylinder 12 extends outward, pushing the mounting seat 13 to move towards the core-pulling module until the mounting seat 13 abuts against the surface of the core-pulling module. At this time, the second core 14 will pass through the pre-set passage on the core-pulling module and continue to extend towards the injection cavity, finally extending into the injection cavity of the lower mold 21. The second core 14 has a similar function as the first core 23, which is used to form another part of the special-shaped structure (such as a side recess, a channel, etc. that is different from the direction of the structure formed by the first core 23) on the LED lamp cup shell, and through cooperation with the first core 23, the molding requirements of the complex-shaped LED lamp cup shell are met.

[0053] The core-pulling frame 11 is also provided with a photoelectric sensor 15, which is installed at a position corresponding to the pre-set core-pulling position of the core-pulling module, and is used to detect in real time whether the core-pulling module moves to the pre-set position. When the photoelectric sensor 15 detects that the core-pulling module reaches the pre-set position, it will send a signal to the control unit, and the control unit will determine whether to start the action of the pneumatic cylinder 12; if the core-pulling module does not reach the pre-set position, the pneumatic cylinder 12 remains in the initial state to avoid the second core 14 from extending out and causing structural interference when the core-pulling module is not in place. Through the monitoring of the position of the core-pulling module by the photoelectric sensor 15, combined with the movement rhythm of the core-pulling module and the movement rhythm of the mounting seat 13 (and the second core 14), a two-time delayed core-pulling structure is formed - that is, the core-pulling module first moves to the specified position to complete the first stage of preparation, and then the second core 14 is driven by the pneumatic cylinder 12 to move to complete the second stage of preparation; after the injection is completed, the second core 14 first exits the injection cavity, and then the core-pulling module drives the first core 23 to exit the injection cavity. Through this sequential and delayed core-pulling action, it is avoided that the pulling or damage caused by the simultaneous core-pulling of multiple cores to the plastic parts, ensuring the smooth demolding of the LED lamp cup shell; at the same time, the entire device is powered by an external power supply and controlled by an external controller; the photoelectric sensor 15 can use the Baigefu RL31-8-H-1000-RT / 73c / 136 photoelectric sensor.

[0054] As Figure 3As shown, the buffer plate 31 serves as a buffer component between the core-pulling frame 11 and the lower mold 21, and its interior is designed with multiple layers of composite, specifically including a memory alloy fiber woven layer 32, a foam metal layer 33, and a gel layer 34. Among them, the memory alloy fiber woven layer 32 is directly in contact with the surface of the lower mold 21, the foam metal layer 33 is between the memory alloy fiber woven layer 32 and the gel layer 34, and the three are mutually attached to form a stable sandwich structure. The role of this sandwich structure is to absorb and relieve the vibration and impact generated during the core-pulling process through the synergistic effect of different material layers - when the core-pulling module moves or the air cylinder 12 acts, the force generated by the device will first be transmitted to the buffer plate 31, and then gradually dispersed and dissipated by each layer structure, avoiding the direct action of the force on the connection part of the core-pulling frame 11 and the lower mold 21, reducing the wear of the two, and at the same time reducing the influence of vibration on the injection cavity in the lower mold 21, ensuring the stability of the LED lamp cup shell forming process.

[0055] The memory alloy fiber woven layer 32 is woven with memory alloy fibers and carbon fiber bundles. This combination of materials gives the layer structure two core functions: first, it has good structural strength and deformation recovery ability. When the buffer plate 31 is slightly deformed by vibration and impact, the memory alloy fibers can restore their original shape, avoiding permanent deformation of the woven layer and ensuring that the buffer effect of the buffer plate 31 does not decay after long-term use. Second, the addition of carbon fiber bundles can improve the wear resistance and thermal conductivity of the woven layer, reducing the friction loss between the woven layer and the lower mold 21 during opening and closing, and on the other hand, conducting some of the heat generated by the lower mold 21 during injection to the outside, helping to maintain the temperature stability of the lower mold 21, and indirectly ensuring the forming quality of the LED lamp cup shell. At the same time, since the memory alloy fiber woven layer 32 is directly in contact with the lower mold 21, its smooth woven surface can also reduce the contact gap between the two, preventing impurities from entering the connection part and affecting the operation of the device.

[0056] The foam metal layer 33 is an intermediate layer of the buffer plate 31, and its surface is provided with multiple hexagonal honeycomb holes 35. These honeycomb holes 35 penetrate from the memory alloy fiber woven layer 32 side to the gel layer 34 side, forming a continuous channel structure. The role of this structure mainly reflects in two aspects: first, through the hollow design of the honeycomb holes 35, the overall weight of the foam metal layer 33 is reduced, ensuring the buffer performance while reducing the additional load of the device; second, the honeycomb holes 35 can act as a "dissipation channel" for vibration energy. When the vibration force is transmitted to the foam metal layer 33, the hole walls of the honeycomb holes 35 will slightly deform, dispersing the concentrated force to multiple hole walls, and then absorbing part of the energy through the elastic deformation of the hole walls, further weakening the influence of vibration on the upper and lower layer structures. In addition, the hexagonal structure of the honeycomb holes 35 can also improve the pressure resistance of the foam metal layer 33, preventing the buffer plate 31 from collapsing when subjected to a large pressure, and ensuring the structural stability of the buffer plate 31.

[0057] The gel layer 34 is made of elastic silica gel material, which has good elasticity and flexibility, can deform when subjected to external force, and quickly recover after the external force disappears, providing basic elastic buffering capacity for the buffer plate 31. On the side of the gel layer 34 facing the foam metal layer 33, a plurality of protruding parts 36 are integrally formed, the shapes and sizes of which are matched with the honeycomb holes 35 on the foam metal layer 33. When installed, the protruding parts 36 will be embedded in the corresponding honeycomb holes 35, which can enhance the connection stability of the gel layer 34 and the foam metal layer 33, avoid relative sliding between the two during buffering, and ensure the synergistic effect of the overall structure of the buffer plate 31. At the same time, after the protruding parts 36 are embedded in the honeycomb holes 35, they can also fill part of the hole space. When the vibration force is transmitted to this place, the protruding parts 36 will deform together with the hole walls of the honeycomb holes 35, further improving the energy absorption effect. In addition, the side of the gel layer 34 away from the foam metal layer 33 directly contacts the surface of the core pulling frame 11, and its soft surface can reduce the friction between the core pulling frame 11 and the buffer plate 31, and at the same time, through its elastic deformation, it can fit the surface of the core pulling frame 11, filling the small gap and improving the sealing of the connection between the buffer plate 31 and the core pulling frame 11.

[0058] The honeycomb holes 35 on the foam metal layer 33 are not designed with equal diameters, and the diameters gradually increase from the end close to the memory alloy fiber woven layer 32 to the end close to the gel layer 34. The effect of this change in diameter mainly lies in the layered conduction and absorption of vibration energy: when the vibration force generated by the core pulling device is transmitted from the lower mold 21 to the memory alloy fiber woven layer 32 and then to the foam metal layer 33, it will first act on the end with smaller diameter. Since the diameter is smaller, the distance between the hole walls is closer, and at this time the hole walls can quickly disperse the initial concentrated force through intensive deformation, avoiding damage to the foam metal layer 33 caused by excessive local stress; as the force is transmitted to the end with larger diameter, the distance between the hole walls increases, and the deformation space of the hole walls also increases, which can more fully absorb the remaining vibration energy and reduce the intensity of energy transmission to the gel layer 34. In addition, the design of gradually increasing diameter can also reduce the overall weight of the foam metal layer 33, further reducing the load of the buffer plate 31 on the connection part of the core pulling frame 11 and the lower mold 21 under the premise of ensuring the structural strength, and avoiding loosening of the connection part due to excessive load after long-term use.

[0059] The honeycomb hole 35 is close to one end of the memory alloy fiber woven layer 32, and the angle is perpendicular to the surface of the buffer plate 31. The effect of this perpendicular angle is to optimize the transmission path of the vibration force, ensuring that the force can enter the honeycomb hole 35 directly. Since the memory alloy fiber woven layer 32 is in direct contact with the lower mold 21, the vibration force will be transmitted in a direction approximately perpendicular to the surface of the buffer plate 31 to the foam metal layer 33, and the perpendicular angle of the end of the honeycomb hole 35 can be consistent with the direction of force transmission, reducing the reflection and loss of force at the contact interface, so that more energy can enter the honeycomb hole 35 and be absorbed by the hole wall deformation. At the same time, the perpendicular angle of the hole also facilitates the smoother embedding of the protruding part 36 on the gel layer 34 during installation - when the protruding part 36 is embedded from the gel layer 34 to the foam metal layer 33, the hole of the perpendicular end of the honeycomb hole 35 can provide clearer guidance, avoiding the protruding part 36 from being stuck due to the angle of the hole, and ensuring the cooperation efficiency of the gel layer 34 and the foam metal layer 33.

[0060] The end of the honeycomb hole 35 away from the memory alloy fiber woven layer 32, that is, close to the gel layer 34, is inclined to the horizontal direction. The effect of this inclined angle is mainly to adapt to the deformation characteristics of the gel layer 34 and improve the synergistic effect of energy absorption. The gel layer 34 is made of elastic silica gel material and is prone to horizontal deformation when subjected to vibration force, and the horizontal inclination angle of the end of the honeycomb hole 35 can be consistent with the horizontal deformation direction of the gel layer 34. When the gel layer 34 deforms horizontally, the protruding part 36 embedded in the honeycomb hole 35 can move along the inclined hole wall direction, reducing the extrusion friction between the protruding part 36 and the hole wall, and avoiding wear caused by inconsistent deformation directions. At the same time, the horizontally inclined hole wall can also increase the contact area with the protruding part 36, and when the vibration energy is transmitted here, the inclined hole wall can share the force with the protruding part 36, dispersing the energy through a wider contact, further improving the overall vibration relief effect of the buffer plate 31, and ensuring that the vibration transmission between the core pulling frame 11 and the lower mold 21 is always at a low level.

[0061] As Figure 2 , Figure 4 , Figure 5As shown, the core pulling module serves as the core component for moving the first core 23, and its main body includes a first movable block 401 and two groups of second movable blocks 402. The two groups of second movable blocks 402 are symmetrically installed on the two sides of the first movable block 401, and such a symmetric layout can balance the force acting on the first movable block 401 and avoid deviation caused by unilateral force during movement. To realize the movement function of the core pulling module, two groups of first sliding rails 403 are fixedly arranged on the core pulling frame 11, and a sliding block 404 is installed on the side of each group of second movable blocks 402 facing the first sliding rail 403. The sliding block 404 and the first sliding rail 403 are connected in a sliding manner. When the core pulling module needs to move, the sliding block 404 can slide along the extension direction of the first sliding rail 403, thereby driving the second movable blocks 402 and the first movable block 401 to move synchronously, providing a stable movement path for the first core 23 to enter or exit the injection cavity of the lower mold 21. At the same time, through the cooperation of the sliding rail and the sliding block, the frictional resistance during movement of the core pulling module is reduced, ensuring smooth movement.

[0062] On one side of the lower mold 21, a moving plate 405 for assisting the positioning of the core pulling module is also arranged, and the moving plate 405 is integrally formed with a moving protrusion 406. Correspondingly, two groups of limiting blocks 407 are installed on the bottom of the first movable block 401, and a limiting groove is formed between the two groups of limiting blocks 407, and the moving protrusion 406 is just clamped in the limiting groove. The function of such a matching structure is to limit the movement direction of the first movable block 401, avoiding lateral deviation during sliding. When the core pulling module moves along the first sliding rail 403, the moving protrusion 406 will slide synchronously in the limiting groove, and through the contact between the groove wall and the protrusion, the lateral displacement of the first movable block 401 is constrained, ensuring that the core pulling module always moves in the preset direction. In addition, the first core 23 is installed on the two groups of second movable blocks 402, and with the symmetric support of the two groups of second movable blocks 402, the first core 23 can remain stable during movement, avoiding tilting of the first core 23 caused by unilateral fixation, ensuring that it can accurately penetrate or exit the injection cavity of the lower mold 21, and ensuring the forming precision of the special-shaped structure of the LED lamp cup shell.

[0063] To further regulate the moving range of the core-pulling module, two sets of limiting members 408 are arranged on each set of first sliding rails 403, and the two sets of limiting members 408 are located at two ends of the first sliding rail 403 respectively. The area between the two sets of limiting members 408 is defined as a moving track, and the sliding block 404 reciprocally slides in the moving track. The limiting member 408 blocks the sliding block 404 from exceeding the preset moving range, so as to avoid collision between the core-pulling module and other components due to excessive sliding of the sliding block 404, or to avoid the first core 23 from being unable to accurately align the injection cavity. Meanwhile, one end of the moving track is set as a working area, and the other end is set as a reset area. The two areas correspond to the working state and idle state of the core-pulling module respectively. Through clear zoning, the operator or the control unit can clearly determine the current position of the core-pulling module, and provide a position basis for subsequent actions (such as driving the second core 14 by the air cylinder 12).

[0064] When the sliding block 404 moves along the first sliding rail 403 to the working area, the core-pulling module moves synchronously with the sliding block 404, until one end of the core-pulling module contacts the surface of the lower mold 21. At this time, the first core 23 installed on the two sets of second movable blocks 402 will be just inserted into the injection cavity of the lower mold 21, so as to prepare for the molding of the special-shaped structure of the LED lamp cup shell in the injection process. Since the photoelectric sensor 15 is installed in the working area, when the sliding block 404 reaches the working area, the photoelectric sensor 15 can detect the position signal of the sliding block 404 (or the core-pulling module), and then trigger the action of the subsequent air cylinder 12, so as to ensure that the second core 14 enters the injection cavity after the first core 23 is in place. When the sliding block 404 moves to the reset area, the core-pulling module moves away from the lower mold 21 with the sliding block 404, and the first core 23 also exits from the injection cavity, completing a core-pulling operation. The reset area is arranged to enable the core-pulling module to return to the initial position after the injection is completed, so as to avoid hindering the opening and closing of the lower mold 21 or the taking out of the plastic part, and to prepare for the next injection cycle.

[0065] To realize the movement and positioning of the second core 14, an active through hole 409 is formed on the first movable block 401 corresponding to the position of the second core 14. The active through hole 409 penetrates through both sides of the first movable block 401, forming an active track for the second core 14 to pass through. The active track provides a fixed moving path for the second core 14, and restricts the moving direction of the second core 14. When the air cylinder 12 drives the second core 14 to move, the second core 14 can smoothly pass through along the extension direction of the active track, avoiding deviation of the second core 14 due to the lack of guiding structure, and ensuring that the second core 14 can accurately align the injection cavity of the lower mold 21. Meanwhile, the inner wall of the active track can be in close contact with the outer wall of the second core 14, reducing the shaking of the second core 14 during movement, and ensuring that the second core 14 maintains a stable posture during the injection process, thereby ensuring the molding effect of the corresponding special-shaped structure on the LED lamp cup shell.

[0066] The second core 14 is provided in a columnar shape as a whole, which can adapt to the molding requirements of most hole-shaped or columnar-shaped special-shaped structures on the LED lamp cup shell, and the columnar structure also facilitates smooth movement in the movable track. The length of the second core 14 is greater than the length of the movable track, and this size design can ensure that the second core 14 always has part of the structure remaining in the movable track during movement, avoiding positioning failure caused by the second core 14 completely leaving the movable track. The movable track is divided into a working area and a waiting area according to the working state of the second core 14: the working area is located at one end of the movable track close to the first core 23, and is the area where the second core 14 extends into the injection cavity; the waiting area is located at one end of the movable track away from the first core 23, and is the parking area of the second core 14 when it is not working. One end of the second core 14 is set as the working end, and the shape and size of this end are determined according to the structure to be formed on the LED lamp cup shell, which is the key part directly contacting the molten raw material and participating in the molding.

[0067] During normal use of the device, first, the slider 404 moves along the first slide rail 403 to the working area, driving the core pulling module as a whole to approach the lower mold 21, so that the first core 23 is inserted into the injection cavity of the lower mold 21, and the first-stage molding preparation is completed. At this time, the working end of the second core 14 is in the waiting area of the movable track, and does not participate in injection, so as to avoid interference with the movement of the first core 23. After the photoelectric sensor 15 installed in the working area senses that the slider 404 (or the core pulling module) reaches the preset position, it will send a signal to the control unit, and the control unit will start the air cylinder 12 after receiving the signal, so that the shaft end of the air cylinder 12 extends outward. When the shaft end of the air cylinder 12 extends, it will push the mounting seat 13 and the second core 14 to move towards the working area of the movable track, so as to gradually move the working end of the second core 14 from the waiting area to the working area, and continue to extend into the injection cavity of the lower mold 21 through the working area. At this time, the second core 14 and the first core 23 are jointly located in the injection cavity, which provides support for the synchronous molding of the complex special-shaped structure of the LED lamp cup shell, and ensures that the plastic part can form a complete design shape after injection molding is completed.

[0068] When the LED lamp cup shell is completed in the injection cavity, the two-time delayed core pulling structure first starts a core pulling operation. This process is achieved by the shaft end contraction of cylinder 12: after the control unit receives the signal of the completion of injection, it drives the shaft end of cylinder 12 to contract to the initial position. Since the second core 14 is connected with the shaft end of cylinder 12 through the mounting seat 13, when the shaft end of cylinder 12 contracts, it will drive the mounting seat 13 to move synchronously in the direction away from the core pulling module, and then pull the second core 14 to move reversely along the extension direction of the movable track. In this process, the working end of the second core 14 will gradually exit from the injection cavity of the lower mold 21 and be separated from the contact with the molded LED lamp cup shell, and finally move to the waiting area of the movable track. The completion of the first core pulling operation can release the constraint of the second core 14 on the plastic part - since the second core 14 usually forms the small or deep special-shaped structure on the plastic part, the priority of exiting can avoid the plastic part from being damaged or deformed due to multi-directional stress when the first core 23 exits later, which lays the foundation for the complete demolding of the plastic part later.

[0069] After the cylinder 12 is completely restored (the shaft end returns to the initial position and the second core 14 is stably stopped in the waiting area), the second core pulling operation is started. At this time, the upper mold 22 is lifted upward under the action of the external driving mechanism, and since the upper mold 22 is connected with the core pulling module through the linkage assembly, the upward force will be converted into the power to drive the core pulling module to move during the lifting process. The linkage assembly plays the role of power transmission in this process, ensuring that the lifting action of the upper mold 22 can stably drive the core pulling module to move along the first slide rail 403 away from the lower mold 21 - specifically, the slider 404 of the core pulling module slides from the working area to the reset area of the first slide rail 403, and the first core 23 mounted on the two groups of second movable blocks 402 moves synchronously with the core pulling module, gradually exits from the injection cavity of the lower mold 21, and finally completely separates from the plastic part. The completion of the second core pulling operation indicates that all special-shaped structures formed by the core on the plastic part are released, and the plastic part can be smoothly taken out from the injection cavity of the lower mold 21, avoiding the damage of the plastic part due to the retention of the first core 23.

[0070] The two delayed core-pulling operations are sequentially realized by the first core 23 and the second core 14: once core-pulling (the second core 14 exits) in the front, twice core-pulling (the first core 23 exits) in the back, and there is a clear time interval and action sequence constraint between the two. The effect of this delay logic is to avoid the multi-directional pulling force on the plastic part when the two groups of cores exit at the same time. If the two groups of cores exit synchronously, the plastic part will deform and crack due to the pulling force in different directions, and even be stuck in the injection cavity. Through the delay design, the second core 14 exits first to release the local constraint of the plastic part, and when the first core 23 exits, the plastic part only bears a single direction of slight force, which can maintain the integrity of the shape. At the same time, the sequence of the two delayed core-pulling operations is linked with the opening and closing action of the upper mold 22 (the second core-pulling is started with the lifting of the upper mold 22), without the need for additional independent driving mechanism, which simplifies the structure of the device, ensures the coordination of the core-pulling action and the mold opening and closing action, and ensures the smooth progress of the entire injection-molding and demolding process.

[0071] As shown in Figure 2 , Figures 4 to 6 , the core components responsible for hydraulic power transmission in the linkage assembly include the first sealing pipe 501. To realize the installation and position adjustment of the first sealing pipe 501, a mounting plate 16 is fixedly arranged on one side of the core-pulling frame 11. The first sealing pipe 501 and the mounting plate 16 are connected in a sliding manner, so that the first sealing pipe 501 can move up and down along the extension direction of the mounting plate 16. At the same time, an electric lifting rod 502 is installed on one side of the mounting plate 16, and a connecting plate 503 is fixed on the outer wall of the first sealing pipe 501. The extension end of the electric lifting rod 502 is connected with the connecting plate 503. When it is necessary to adjust the height of the first sealing pipe 501, the extension end of the electric lifting rod 502 will drive the connecting plate 503 to move up and down, and then pull the first sealing pipe 501 to slide along the mounting plate 16 synchronously, realizing the lifting or lowering operation. The function of this structure is to flexibly adjust the position of the first sealing pipe 501 according to the opening and closing height of the upper mold 22 and the movement demand of the core-pulling module, to ensure the accuracy of subsequent hydraulic power transmission, and to avoid the misalignment caused by the fixed position of the first sealing pipe 501 and other components.

[0072] On one side of the upper mold 22, a push frame 504 is fixedly arranged, and the push frame 504 provides mounting support for a first push rod 505; one end of the first push rod 505 is provided with a first sealing block 506, and the first push rod 505 is entirely arranged in the first sealing pipe 501. The inside of the first sealing pipe 501 is divided into a pushing part and a liquid adding part, wherein the liquid adding part is below the pushing part, the first sealing block 506 is located in the pushing part, and the outer wall of the first sealing block 506 is tightly fitted with the inner wall of the first sealing pipe 501, and a first sealing cavity for storing hydraulic oil is formed between the two. When the first push rod 505 moves with the opening and closing action of the upper mold 22, the first sealing block 506 slides up and down in the pushing part: when the upper mold 22 is closed downward, the first push rod 505 pushes the first sealing block 506 to move downward, and the space of the first sealing cavity increases; when the upper mold 22 is lifted upward, the first push rod 505 pulls the first sealing block 506 to move upward, and the space of the first sealing cavity gradually becomes smaller. The function of the first sealing cavity is to change the pressure of the internal hydraulic oil by changing the space, to convert the mechanical action of the upper mold 22 into hydraulic power, to provide a power source for the subsequent movement of the core-pulling module.

[0073] In order to ensure the replenishment and stable state of the hydraulic oil in the first sealing cavity, a liquid adding pipe 507 and an exhaust port 508 are arranged on both sides of the first sealing pipe 501. The liquid adding pipe 507 is located in the liquid adding part, and its function is to supplement the hydraulic oil in the first sealing pipe 501: when the liquid level sensor detects that the hydraulic oil in the first sealing pipe 501 is insufficient, the liquid adding pipe 507 can be used to inject hydraulic oil into the liquid adding part, to ensure that there is enough hydraulic oil in the first sealing cavity to participate in power transmission. The exhaust port 508 is close to the top of the first sealing pipe 501, and is connected with an external air extraction structure, and its function is to exhaust the air in the first sealing cavity: if the air pressure in the first sealing cavity is too high, the copper drum exhaust port 508 can exhaust the air to ensure the stability of the internal air pressure.

[0074] In addition, a liquid level sensor and a pressure sensor are arranged on the first sealing pipe 501, the liquid level sensor is used to monitor the liquid level of the hydraulic oil in the first sealing pipe 501 in real time, to avoid transmission failure caused by low oil level; the pressure sensor is used to monitor the pressure change in the first sealing cavity, to realize the operation of pressing the internal air by filling the hydraulic oil in the first sealing pipe 501, to ensure the normal operation of the linkage assembly; the liquid level sensor can use a Bonar L-GAGE LE550 liquid level sensor, and the pressure sensor can use a HDEK HDA4744-A-016-000 pressure sensor.

[0075] When the hydraulic oil in the first sealed tube 501 is consumed, the internal air pressure will change, and the internal hydraulic oil needs to be filled through the liquid filling pipe 507. During the filling process, air will enter. A liquid level threshold and a pressure threshold are set. When the hydraulic oil is filled to the liquid level, the entering of air will cause the internal pressure to exceed the pressure threshold. The exhaust port 508 is opened to open the external air extraction structure, and the residual air in the first sealed tube 501 is extracted until the pressure sensor detects that the internal pressure decreases to the normal working range, and the exhaust port 508 and the air extraction structure are closed, so that the first sealed cavity is only filled with hydraulic oil without air residue, avoiding the influence of air compressibility on power transmission efficiency during subsequent hydraulic transmission, and ensuring that the pressure in the first sealed cavity is stable, providing continuous and uniform hydraulic power for the movement of the core pulling module.

[0076] At the same time, during normal use, the first sealing block 506 is located in the push portion and moves within the activity range of the push portion, and the liquid filling portion is located below the push portion and outside the activity range of the push portion. During normal operation, the first sealing block 506 cannot move to the liquid filling portion. When the liquid filling operation is needed, the electric lifting rod 502 needs to be started first. The extension of the shaft end of the electric lifting rod 502 will drive the first sealed tube 501 to move upward for lifting operation. At this time, the first sealing block 506 is stationary because it is connected to the first push rod 505 and the first push rod 505 remains in a fixed position with the upper die 22. With the upward movement of the first sealed tube 501, the relative position of the first sealing block 506 and the first sealed tube 501 changes, and finally the first sealing block 506 moves from the push portion to the liquid filling portion.

[0077] At this time, the liquid filling pipe 507 in the liquid filling portion is no longer blocked by the first sealing block 506 and is directly connected with the first sealed cavity. External hydraulic oil can continuously enter the first sealed cavity through the liquid filling pipe 507 until the liquid level sensor detects that the hydraulic oil reaches the preset liquid level threshold. Then the shaft end of the electric lifting rod 502 is retracted, the first sealed tube 501 is lowered to reset, the first sealing block 506 returns to the push portion, the through connection between the liquid filling pipe 507 and the first sealed cavity is disconnected, and the precise supplement of hydraulic oil is realized without affecting the normal sliding of the first sealing block 506 in the push portion and the hydraulic power transmission.

[0078] On the bottom of the moving plate 405, a second sealing pipe 509 is fixedly arranged, which cooperates with the first sealing pipe 501 to form a hydraulic transmission loop structure; meanwhile, a second push rod 510 is installed below the moving plate 405, and the two ends of the second push rod 510 are connected with two groups of second movable blocks 402 respectively, so that the movement of the second push rod 510 directly drives the core component (second movable block 402) of the core-pulling module. One end of the second push rod 510 is provided with a second sealing block 511, and the second sealing block 511 is integrally arranged in the second sealing pipe 509, and the outer wall of the second sealing block 511 is attached to the inner wall of the second sealing pipe 509, and a second sealing cavity for accommodating hydraulic oil is formed between the two. The function of the second sealing cavity is to receive the hydraulic oil and pressure transmitted from the first sealing cavity, and to push the second sealing block 511 to move by the pressure change of the internal hydraulic oil, thereby driving the second push rod 510 to move, and finally converting the hydraulic power into the mechanical movement force of the core-pulling module, providing direct power support for the core-pulling module to approach or move away from the lower die 21.

[0079] In order to realize the transmission of hydraulic power, the first sealing pipe 501 and the second sealing pipe 509 are connected by a connecting pipe, and the two ends of the connecting pipe are respectively connected with the liquid adding part of the first sealing pipe 501 and the side wall of the second sealing pipe 509, so that the first sealing cavity and the second sealing cavity form a mutual through hydraulic circuit. The function of this through structure is to ensure that the hydraulic oil in the first sealing cavity can flow into the second sealing cavity through the connecting pipe, and the pressure of the two is always balanced - when the space of the first sealing cavity changes due to the movement of the first sealing block 506, the space of the second sealing cavity will change in the opposite direction. Specifically, when the upper die 22 is lifted upward to drive the first sealing block 506 to move upward, the space of the first sealing cavity is reduced, and the internal hydraulic oil flows into the second sealing cavity through the connecting pipe due to the increase of pressure, resulting in the increase of the space of the second sealing cavity; on the contrary, when the upper die 22 is lowered to drive the first sealing block 506 to move downward, the space of the first sealing cavity is increased, and the hydraulic oil in the second sealing cavity flows back to the first sealing cavity, and the space of the second sealing cavity is reduced.

[0080] The change of the second sealed cavity space directly determines the position state of the core pulling module: when the first sealed cavity space is reduced and the hydraulic oil flows into the second sealed cavity to cause the space to increase, the hydraulic oil in the second sealed cavity will push the second sealing block 511 to move away from the second sealing tube 509, and the second sealing block 511 will in turn drive the second push rod 510 to move outward. Since the second push rod 510 is connected with the second movable block 402, the outward moving second push rod 510 will pull the two groups of second movable blocks 402 to slide along the first slide rail 403 away from the lower mold 21, so that the entire core pulling module moves away from the lower mold 21, and the first core 23 exits the injection cavity, completing the core pulling action. Conversely, when the first sealed cavity space increases and the second sealed cavity space decreases, the second sealing block 511 moves to the inside of the second sealing tube 509 under the pull of the hydraulic oil, driving the second push rod 510 to move towards the lower mold 21, and then pushing the second movable block 402 and the core pulling module to move towards the lower mold 21, and the first core 23 penetrates into the injection cavity, preparing for injection. This linkage relationship ensures that the action of the core pulling module is synchronized with the opening and closing action of the upper mold 22, without the need for additional independent driving components, simplifying the structure of the device while ensuring the coordination of the action.

[0081] As shown in Figure 7 , Figure 8 , the linkage assembly further includes a linkage rod 512 for assisting in power transmission in addition to the hydraulic transmission structure, which functions to further ensure the coordination of the action of the upper mold 22 and the core pulling module through mechanical sliding fit. On one side of the upper mold 22, a second slide rail 513 is fixedly arranged, which provides a fixed path for the sliding of subsequent components; correspondingly, an inclined block 410 is installed on the first movable block 401, and the inclined surface of the inclined block 410 and the plane of the first movable block 401 form an angle α, and the opening direction of the angle α is towards the lower mold 21. The effect of this angle setting is to convert the vertical lifting action of the upper mold 22 into horizontal moving power of the core pulling module - since the angle α opens towards the lower mold 21, when an external force pushes the related components to slide along the inclined surface, a component force towards the lower mold 21 or away from the lower mold 21 can be generated, providing auxiliary support for the movement of the core pulling module, avoiding the power shortage or delay problem that may occur when relying solely on hydraulic transmission.

[0082] Two ends of the linkage rod 512 are respectively provided with a first connecting block 514 and a second connecting block 515 through rotating structures, and the rotating connection mode can adjust the angle of the connecting blocks in the sliding process, so as to avoid the jam caused by the rigidity of the structure. The first connecting block 514 is in sliding connection with the second slide rail 513, and can slide up and down along the extension direction of the second slide rail 513 (i.e. the lifting direction of the upper mold 22); the second connecting block 515 is in sliding connection with the inclined surface of the inclined block 410, and can move along the inclined direction of the inclined surface. In the initial state, the first connecting block 514 is located at the top of the second slide rail 513, and the second connecting block 515 is located at the bottom of the inclined surface of the inclined block 410. The initial position is set to reserve enough sliding stroke for the subsequent action: when the upper mold 22 starts to act, the first connecting block 514 has enough space to slide from the top to the bottom, and the second connecting block 515 also has enough space to slide from the bottom of the inclined surface to the top, so as to ensure that the whole linkage structure can completely participate in the power transmission, and avoid the incomplete action caused by the insufficient stroke.

[0083] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments.

Claims

1. A core pulling device for injection molding of an LED lamp cup housing, characterized in that: it comprises a core pulling frame (11), a core pulling module and a linkage assembly for driving the core pulling module to move, the core pulling frame (11) is installed on one side of a lower mold (21) and a buffer plate (31) is clamped at the connection between the core pulling frame (11) and the lower mold (21); the core pulling module is slidably connected with the core pulling frame (11), an upper mold (22) is connected with the core pulling module through the linkage assembly, one end of the core pulling module is provided with a first core (23), one end of the core pulling module is in contact with the lower mold (21), and the first core (23) is arranged in an injection cavity of the lower mold (21); a cylinder (12) is arranged on the core pulling frame (11), an installation seat (13) is arranged at the shaft end of the cylinder (12), a second core (14) is arranged on the installation seat (13), and the installation seat (13) is extended to abut against the core pulling module through the shaft end of the cylinder (12), so that the second core (14) is arranged in the core pulling module and extends into the injection cavity of the lower mold (21); a photoelectric sensor (15) is arranged on the core pulling frame (11) to detect whether the core pulling module moves to a preset core pulling position, and a secondary time delay core pulling structure is formed by the movement of the photoelectric sensor (15), the core pulling module and the installation seat (13); the core pulling module comprises a first movable block (401) and two groups of second movable blocks (402), the two groups of second movable blocks (402) are symmetrically arranged on both sides of the first movable block (401), two groups of first sliding rails (403) are arranged on the core pulling frame (11), a sliding block (404) is arranged on one side of each second movable block (402), and the sliding block (404) is slidably connected with the first sliding rail (403); a moving plate (405) is further arranged on one side of the lower mold (21), a moving convex strip (406) is arranged on the moving plate (405), two groups of limiting blocks (407) are arranged at the bottom of the first movable block (401) to form a limiting groove, the moving convex strip (406) is clamped in the limiting groove, and the first core (23) is arranged on the two groups of second movable blocks (402); two groups of limiting members (408) are arranged on the first sliding rail (403), a moving track is arranged between the two groups of limiting members (408), the sliding block (404) is located in the moving track, and one end of the moving track is provided as a working area and a reset area; when the sliding block (404) moves to the working area, one end of the core pulling module is in contact with the lower mold (21), the first core (23) is arranged in the injection cavity of the lower mold (21), and the photoelectric sensor (15) is arranged in the working area; when the sliding block (404) moves to the reset area, the core pulling module is away from the lower mold (21), and the first core (23) is withdrawn from the injection cavity, thereby realizing one-time core pulling operation. ​ ​ ​ ​ ​ ​ ​ ​ ​ The linkage assembly comprises a first sealing pipe (501), one side of the core-pulling frame (11) is provided with a mounting plate (16), the first sealing pipe (501) is in sliding connection with the mounting plate (16), and one side of the mounting plate (16) is provided with an electric lifting rod (502), the first sealing pipe (501) is provided with a connecting plate (503), and the electric lifting rod (502) is connected with the connecting plate (503), and the first sealing pipe (501) is lifted through the electric lifting rod (502); One side of the upper mold (22) is provided with a push frame (504), and a first push rod (505) is arranged on the push frame (504), one end of the first push rod (505) is provided with a first sealing block (506), and the first push rod (505) is arranged in the first sealing pipe (501), the first sealing pipe (501) is provided with a push part and a liquid adding part, the liquid adding part is located below the push part, the first sealing block (506) is located in the push part, and the first sealing block (506) and the first sealing pipe (501) form a first sealing cavity for storing hydraulic oil, and the space size of the first sealing cavity gradually decreases with the upward movement of the first sealing block (506); The first sealing pipe (501) is provided with a liquid adding pipe (507) and an exhaust port (508) on both sides, the liquid adding pipe (507) is located in the liquid adding part, the exhaust port (508) is close to the top of the first sealing pipe (501) and is connected with an external air exhaust structure, and the first sealing pipe (501) is provided with a liquid level sensor and a pressure sensor.

2. The core-pulling device of the LED lamp cup shell injection mold according to claim 1, wherein: The buffer plate (31) comprises a memory alloy fiber woven layer (32), a foam metal layer (33) and a gel layer (34), the memory alloy fiber woven layer (32) is in contact with the lower mold (21), and the foam metal layer (33) is located between the memory alloy fiber woven layer (32) and the gel layer (34), and the three form a sandwich structure; The memory alloy fiber woven layer (32) is woven by memory alloy fibers and carbon fiber bundles; A plurality of hexagonal honeycomb holes (35) are formed in the foam metal layer (33), and the honeycomb holes (35) extend from one side of the memory alloy fiber woven layer (32) to one side of the gel layer (34); The gel layer (34) is made of elastic silica gel, and a plurality of convex portions (36) matched with the honeycomb holes (35) are integrally formed on one side of the gel layer (34) facing the foam metal layer (33), the convex portions (36) are embedded in the corresponding honeycomb holes (35), and the other side of the gel layer (34) away from the foam metal layer (33) is in contact with the surface of the core-pulling frame (11).

3. The core-pulling device of the LED lamp cup shell injection mold according to claim 2, wherein: The honeycomb hole (35) is gradually increased in size, and the honeycomb hole (35) is relatively perpendicular to the surface of the buffer plate (31) at one end of the memory alloy fiber woven layer (32), and is inclined to the horizontal direction at the other end.

4. The core pulling device of the LED lamp cup shell injection mold according to claim 1, characterized in that: The first movable block (401) is provided with a movable through hole (409) corresponding to the second core (14), and the first movable block (401) is formed with a movable track through the movable through hole (409), and the second core (14) is arranged in the movable track and moves along the extension direction of the movable track; The second core (14) is in the shape of a column, the length of the second core (14) is greater than the length of the movable track, one end of the movable track close to the first core (23) is set as a working area, and the other end away from the first core (23) is set as a waiting area, and one end of the second core (14) is set as a working end; During use of the device, the slider (404) moves to the working area, the first core (23) is arranged in the injection cavity, the working end of the second core (14) is located in the waiting area, the photoelectric sensor (15) senses the slider (404), the shaft end of the cylinder (12) is extended, and the working end of the second core (14) moves from the waiting area to the working area and extends into the injection cavity through the working area.

5. The core pulling device of the LED lamp cup shell injection mold according to claim 4, characterized in that: The twice-delayed core pulling structure is that, after the injection molding is completed, the shaft end of the cylinder (12) is retracted to restore, the working end of the second core (14) moves out of the injection cavity and moves to the waiting area in the movable track, and one core pulling operation is completed; After the cylinder (12) is restored, the upper mold (22) is lifted upward, and during the lifting process, the upper mold (22) drives the core pulling module away from the lower mold (21) through the linkage assembly, the first core (23) exits the injection cavity, and a second core pulling operation is completed; Through the sequential core pulling operations of the first core (23) and the second core (14), twice-delayed core pulling is realized.

6. The core pulling device of the LED lamp cup shell injection mold according to claim 1, characterized in that: The bottom of the moving plate (405) is provided with a second sealing tube (509), and a second push rod (510) is arranged below the moving plate (405), the second push rod (510) is connected with two groups of second movable blocks (402) respectively, one end of the second push rod (510) is provided with a second sealing block (511), the second sealing block (511) is arranged in the second sealing tube (509), and a second sealing cavity is formed between the second sealing block (511) and the second sealing tube (509). The first sealing tube (501) and the second sealing tube (509) are connected by a connecting tube, the first sealing cavity and the second sealing cavity are mutually through, the second sealing cavity space increases with the first sealing cavity space narrowing, the second push rod (510) moves outward, the core pulling module moves away from the lower die (21), and vice versa.

7. The core pulling device of the LED lamp cup shell injection mold according to claim 1, wherein: The linkage assembly further comprises a linkage rod (512), the upper die (22) is provided with a second sliding rail (513) on one side, the first movable block (401) is provided with an inclined block (410), an angle α is formed between the inclined surface of the inclined block (410) and the plane of the first movable block (401), and the opening direction of the angle α is towards the lower die (21); The linkage rod (512) is rotatably provided with a first connecting block (514) and a second connecting block (515) at both ends, the first connecting block (514) is slidably connected with the second sliding rail (513), the second connecting block (515) is slidably connected with the inclined surface of the inclined block (410), the first connecting block (514) is located at the top of the second sliding rail (513), and the second connecting block (515) is located at the bottom of the inclined surface of the inclined block (410). When the first connecting block (514) moves from the top to the bottom of the second sliding rail (513), the second connecting block (515) moves from the bottom to the top of the inclined surface of the inclined block (410).

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