Internal hook demoulding mechanism and method for automobile lamp injection mold

Abstract

The present invention discloses an inner barb demoulding mechanism and method for an automobile lamp injection mold, and specifically relates to the field of injection molding technology. The inner barb demoulding mechanism for an automobile lamp injection mold comprises a lower mold and an upper mold, and a molding insert is arranged on the lower mold. The present invention can complete intermittent control for multiple inner barbs and molded products through a demoulding mechanism, and can complete early demoulding control for the inner barbs of the molded product by adopting a gap advancement design, thereby avoiding the problem of damage to the molded product, and adopting multiple modes of demoulding operation at the same time, thereby avoiding damage to the molded product. Through the design of a knocking mechanism, a stable knocking force can be provided in the early stage of demoulding, accelerating the peeling of the molded product, and facilitating shortening the demoulding process, and can continuously deliver cooling liquid into multiple inner barbs to complete cooling molding, thereby avoiding the problem of incomplete cooling of the inner barb area affecting the demoulding effect, thereby improving the yield rate and reducing the scrap amount.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an inner barb demoulding mechanism and method for an injection molding mold for automobile lamps. Background Art

[0002] ‌Automobile lamp injection mold is an injection molding tool used to manufacture automobile lamps. It can process plastic materials into various parts of lamps, such as lamp housings, reflectors, etc. through injection molding;

[0003] Specifically, the injection mold for automobile headlights usually includes the mold cavity, core, pouring system, cooling system, ejection system and other parts. The casting system of the mold is used to inject the material into the mold cavity to form the required headlight parts. Finally, the molded parts are ejected from the mold through the ejection system to complete the entire injection molding process. Due to the buckle design on the headlights, there is a problem of barbs, and the molded product will interfere with the core insert, affecting the demolding work.

[0004] The inner barb demoulding mechanism of the automobile lamp injection mold disclosed in the patent application with reference publication number CN103934989B is characterized in that a spring hole is opened in the inner barb core pulling, a spring is arranged in the spring hole, one end of the spring is in contact with the inner wall of the spring hole, and the other end is in contact with the core slider. The spring is conducive to the inner barb of the automobile lamp being disengaged from the inner barb of the automobile lamp, making the inner barb core pulling out smoother and smoother.

[0005] At present, the demoulding methods for internal hooks on the market mostly use spring structures to control the movement of the internal hook core pulling to complete the demoulding operation. However, during repeated use, the spring is prone to fatigue and the reset effect is reduced, which affects the demoulding effect. At the same time, the current demoulding methods for internal hooks are relatively single, and multiple demoulding operations cannot be performed on the internal hook module, resulting in reduced demoulding accuracy and the problem of incomplete demoulding leading to product damage, which increases production costs. Summary of the invention

[0006] The object of the present invention is to provide an inner barb demoulding mechanism and method for an automobile lamp injection mold to solve the above technical problems.

[0007] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0008] The present invention is an internal hook demoulding mechanism for an automobile lamp injection mold, comprising a lower mold and an upper mold, wherein a molding insert is arranged on the lower mold, and a molding cavity matched with the molding insert is arranged on the upper mold, and further comprising:

[0009] Multiple inner hooks are distributed on the molding insert to complete the molding operation of the lamp product;

[0010] A knocking mechanism is arranged on the lower mold to provide a demoulding knocking operation. The knocking mechanism is divided into an action unit and a curing unit. The action unit completes a continuous knocking action on the lower mold, and the curing unit is connected with a plurality of inner hooks to complete a cooling and molding operation.

[0011] The demoulding mechanism is arranged on the lower mold and the molding insert for the demoulding operation of the automotive lamp product. The demoulding mechanism and the knocking mechanism complete the power connection, and the knocking mechanism completes the active control of the demoulding mechanism. At the same time, multiple internal hooks of the demoulding mechanism are connected to complete the control. The demoulding operation is completed by intermittently controlling the multiple internal hooks and the automotive lamp product through the demoulding mechanism.

[0012] Further, each inner barb member comprises:

[0013] The control seat is hidden in the molded insert, a storage area is opened at the front end of the control seat, and an installation area is opened through the rear end of the control seat;

[0014] The barb core is slidably arranged in the storage area of ​​the control seat. A cooling channel is arranged in the barb core. A cooling inlet pipe communicating with the cooling channel is installed on one side of the tail of the barb core, and a cooling outlet pipe communicating with the cooling channel is installed on the other side of the tail of the barb core.

[0015] Further, each inner barb member further comprises:

[0016] The extrusion chamber is arranged in the installation area, and a piston plate is installed in the extrusion chamber in a sliding and sealing manner, and the piston plate divides the extrusion chamber into a first space and a second space;

[0017] A control rod is arranged between the piston plate and the barb core, and a return spring is sleeved on the outside of the control rod;

[0018] A propulsion tube, arranged on the extrusion chamber and communicating with the first space;

[0019] A liquid inlet pipe, which is arranged on the extrusion chamber and communicates with the second space;

[0020] A liquid outlet pipe is arranged on the extrusion cavity and communicates with the second space;

[0021] Two pushers are arranged on the barb core to assist in demoulding, and the two pushers are communicated with the liquid outlet pipe.

[0022] Furthermore, each pusher comprises:

[0023] A reserved channel is arranged on the barb core;

[0024] The embedded pipe is hidden in the reserved channel of the barb core, a sliding area is provided through the front end of the embedded pipe, and a sliding rod is slidably provided in the sliding area;

[0025] The sealing plug is rotatably arranged at the front end of the sliding rod, the sealing plug is hidden in the reserved channel to complete the plugging, and an extrusion spring is sleeved on the outside of the sliding rod;

[0026] An arc-shaped slide groove is arranged at the front end of the reserved channel, and a slide rod is slidably installed in the arc-shaped slide groove, and the slide rod is fixedly connected to the sealing plug.

[0027] Furthermore, the striking mechanism comprises:

[0028] An annular seat is arranged on the lower die, and a plurality of arc-shaped protrusions are arranged in a circular array on the lower surface of the annular seat;

[0029] The annular cavity is concentrically arranged below the annular seat, and the annular cavity is connected to the lower die through a bracket. The top of the annular cavity is open, and a sealing ring is rotatably installed at the open position of the top of the annular cavity.

[0030] A plurality of triggering members are arranged in a circular array on the upper surface of the sealing ring, and the plurality of triggering members cooperate with a plurality of arc-shaped protrusions to complete the knocking operation;

[0031] An extrusion ring, a sliding seal is arranged in the annular cavity, and the extrusion ring is connected with a plurality of triggering members to complete the follow-up movement;

[0032] An inlet pipe is connected and arranged at one side of the bottom of the annular cavity;

[0033] The lead-out pipe is connected and arranged at the other side of the bottom of the annular cavity, and the lead-out pipe is connected with the cooling inlet pipes of the plurality of inner barb parts through a pipeline.

[0034] Furthermore, the striking mechanism further comprises:

[0035] A driving motor is arranged on the lower die through a bracket;

[0036] The drive shaft is arranged at the output end of the drive motor, a No. 1 electromagnetic clutch is sleeved on the outside of the drive shaft, and a transmission frame connected to the sealing ring is sleeved on the outside of the No. 1 electromagnetic clutch.

[0037] Furthermore, each triggering element comprises:

[0038] A trigger sleeve is arranged on the upper surface of the sealing ring;

[0039] The trigger arm No. 1 is slidably engaged in the trigger sleeve. The trigger arm No. 1 slides through the top of the trigger sleeve. A ball is rotatably installed on the top of the trigger arm No. 1, and the ball is in sliding contact with the arc-shaped protrusion, so that the extrusion action of the trigger arm No. 1 is completed through the arc-shaped protrusion;

[0040] The second trigger arm is arranged at the bottom of the first trigger arm, and the second trigger arm slides through the bottom of the trigger sleeve and the sealing ring, and the bottom of the second trigger arm is connected to the extrusion ring;

[0041] The knocking spring is sleeved on the outside of the No. 1 trigger arm, and the knocking spring is located between the No. 1 trigger arm and the trigger sleeve. The knocking spring pushes the No. 1 trigger arm to move toward the annular seat.

[0042] Furthermore, the demoulding mechanism comprises:

[0043] The second electromagnetic clutch is sleeved on the outside of the driving shaft, and an outer gear ring is installed on the outside of the second electromagnetic clutch through a bracket transmission;

[0044] Two ejector parts are symmetrically and slidably arranged on both sides of the lower mold, and the power transmission of the two ejector parts is completed through the outer gear ring, and the gap demoulding processing of multiple internal hook parts and products is completed through the two ejector parts.

[0045] Furthermore, each ejector pin comprises:

[0046] The demoulding ejector pin is slidably arranged on the lower mold and extends to the molding insert. A retaining ring is arranged at the bottom of the demoulding ejector pin, and a limiting spring is sleeved on the outside of the demoulding ejector pin.

[0047] A control area is arranged at the bottom of the ejector pin, and a control plate is installed in a sliding and sealing manner in the control area;

[0048] The internal thread sleeve is rotatably mounted on the lower die through a bracket, a driving gear engaged with the external gear ring is installed at the bottom of the internal thread sleeve, a telescopic screw is arranged in the internal thread sleeve through thread engagement, and the top of the telescopic screw is fixedly connected to the bottom of the control board;

[0049] The conveying pipeline is arranged on the demoulding ejector pin and communicates with the control area, and the control area is communicated with the corresponding inner hook piece through the conveying pipeline.

[0050] The present invention also provides an inner barb demoulding method for an automobile lamp injection mold, and the demoulding method specifically comprises the following steps:

[0051] Step 1, firstly, control the multiple inner hook parts to reset, and then close the upper mold and the lower mold to perform injection molding;

[0052] Step 2: After injection molding, control the upper mold and the lower mold to separate;

[0053] Step 3: The demoulding mechanism first controls the multiple inner hooks to shrink and separate from the molded product, and then the demoulding mechanism continues to move to complete the overall demoulding operation of the molded product;

[0054] Step 4: The inner barb can generate a certain thrust when the inner barb moves during demoulding, so that the inner barb can be effectively separated from the molded product;

[0055] Step 5: The knocking mechanism can provide a stable knocking force, and the knocking mechanism can continuously deliver coolant into the multiple inner hook parts to complete cooling and molding.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] The present invention is provided with a demoulding mechanism, which can perform intermittent control on a plurality of inner barbs and a molded product, so that when the demoulding mechanism is in action, the plurality of inner barbs are first controlled to shrink and separate from the molded product, and then the demoulding mechanism continues to act to complete the overall demoulding operation of the molded product. By adopting a gap advancement design, the early demoulding control can be performed on the inner barbs of the molded product, thereby avoiding the problem of damage to the molded product.

[0058] The present invention adopts the design of the inner barb piece, so that the inner barb piece itself is forced to spray out the demoulding agent, and the inner barb piece can generate a certain thrust when the demoulding moves, so that the inner barb piece and the molded product can be effectively separated, avoiding the problem of adhesion, and adopting multiple demoulding operations at the same time, improving the demoulding success rate and avoiding damage to the molded product;

[0059] The present invention is provided with a knocking mechanism, and the design of the knocking mechanism can provide a stable knocking force in the early stage of demolding, accelerate the separation of the molding insert and the molded product, and help shorten the demolding process. At the same time, when the knocking mechanism is running, it can continuously send coolant into multiple inner hook parts to complete cooling and molding, avoid the problem that the inner hook part area is not completely cooled and affects the demolding effect, so that the molded product can complete the demolding work quickly, improve the yield rate, and reduce the scrap amount.

[0060] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is the overall front view of the present invention;

[0062] Figure 2 It is a schematic diagram of the separation of the upper mold and the lower mold of the present invention;

[0063] Figure 3 It is a schematic diagram of installing the molding insert of the present invention on the lower mold;

[0064] Figure 4 It is a schematic diagram of installing the demoulding mechanism of the present invention on the lower mold;

[0065] Figure 5 It is a schematic diagram of the demoulding mechanism and the distribution of the molding inserts of the present invention;

[0066] Figure 6 It is a schematic diagram of the demoulding mechanism of the present invention;

[0067] Figure 7 It is a schematic diagram of the distribution of the knocking mechanism and the demoulding mechanism of the present invention;

[0068] Figure 8 It is a schematic diagram of the ejector pin of the present invention;

[0069] Fig. 9 It is a schematic diagram of the knocking mechanism of the present invention;

[0070] Fig.10 It is a schematic diagram of the extrusion ring of the present invention in the annular cavity;

[0071] Fig.11 A schematic diagram of a triggering member of the present invention;

[0072] Fig.12 It is a schematic diagram of the inner barb of the present invention;

[0073] Fig.13 It is a schematic diagram of the distribution of the extrusion cavity and the barb core of the present invention;

[0074] Fig.14 It is a schematic diagram of the extrusion cavity of the present invention;

[0075] Fig.15 It is a schematic diagram of installing the pusher of the present invention on the barb core;

[0076] Fig.16 It is a schematic diagram of a pushing member of the present invention.

[0077] In the figure: 1. lower die; 2. upper die; 3. forming insert; 4. control seat; 5. storage area; 6. installation area; 7. barb core; 8. cooling channel; 9. cooling inlet pipe; 10. cooling outlet pipe; 11. extrusion chamber; 12. piston plate; 13. No. 1 space; 14. No. 2 space; 15. control rod; 16. reset spring; 17. propulsion pipe; 18. liquid inlet pipe; 19. liquid outlet pipe; 20. reserved channel; 21. embedded pipe; 22. sliding area; 23. sliding rod; 24. sealing plug; 25. extrusion spring; 26. arc slide groove; 27. sliding rod; 28. Annular seat; 29. ​​Arc-shaped protrusion; 30. Annular cavity; 31. Sealing ring; 32. Extrusion ring; 33. Inlet pipe; 34. Outlet pipe; 35. Driving motor; 36. Driving shaft; 37. No. 1 electromagnetic clutch; 38. Trigger sleeve; 39. No. 1 trigger arm; 40. No. 2 trigger arm; 41. Knocking spring; 42. No. 2 electromagnetic clutch; 43. Outer gear ring; 44. Demolding ejector pin; 45. Limiting spring; 46. Control area; 47. Control board; 48. Internal threaded sleeve; 49. Driving gear; 50. Telescopic screw; 51. Conveying pipeline. DETAILED DESCRIPTION

[0078] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0079] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0080] Embodiment 1: The present invention provides a technical solution: Figure 1 , Figure 2 and Figure 3 As shown, an internal hook demoulding mechanism for an automobile lamp injection mold comprises a lower mold 1 and an upper mold 2, a molding insert 3 is arranged on the lower mold 1, and a molding cavity matched with the molding insert 3 is arranged on the upper mold 2, and further comprises:

[0081] A plurality of inner hooks are distributed on the molding insert 3 to complete the molding operation of the lamp product;

[0082] A knocking mechanism is arranged on the lower mold 1 to provide a demoulding knocking operation. The knocking mechanism is divided into an action unit and a curing unit. The action unit completes a continuous knocking action on the lower mold 1, and the curing unit is connected with a plurality of inner barbs to complete a cooling and molding operation.

[0083] The demoulding mechanism is arranged on the lower mold 1 and the molding insert 3 for demoulding operation of the vehicle lamp product. The demoulding mechanism and the knocking mechanism complete the power connection, and the knocking mechanism completes the active control of the demoulding mechanism. At the same time, the multiple inner hooks of the demoulding mechanism are connected to complete the control, and the demoulding operation is completed by intermittently controlling the multiple inner hooks and the vehicle lamp product through the demoulding mechanism;

[0084] like Fig.12 and Fig.13 As shown, in the embodiment of the present invention, each inner barb comprises:

[0085] A control seat 4 is hidden in the molded insert 3, a storage area 5 is opened at the front end of the control seat 4, and an installation area 6 is opened through the rear end of the control seat 4;

[0086] The barb core 7 is slidably arranged in the storage area 5 of the control seat 4, and the barb core 7 can be hidden in the storage area 5. A cooling channel 8 is arranged in the barb core 7. A cooling inlet pipe 9 communicating with the cooling channel 8 is installed on one side of the tail of the barb core 7. The shape of the barb core 7 can be freely set according to design requirements. A No. 1 one-way valve for controlling the one-way introduction of coolant into the cooling channel 8 is arranged at the end of the cooling inlet pipe 9. A cooling outlet pipe 10 communicating with the cooling channel 8 is installed on the other side of the tail of the barb core 7. A No. 2 one-way valve for controlling the one-way exit of coolant from the cooling channel 8 is arranged at the end of the cooling outlet pipe 10. The cooling outlet pipe 10 communicates with the outside through a pipeline.

[0087] like Fig.14 As shown, each inner barb member further comprises:

[0088] The extrusion chamber 11 is arranged in the installation area 6, and both ends of the extrusion chamber 11 are in sealing contact with the installation area 6. A piston plate 12 is installed in the extrusion chamber 11 in a sliding and sealing manner. The piston plate 12 divides the extrusion chamber 11 into a first space 13 and a second space 14.

[0089] A control rod 15 is disposed between the piston plate 12 and the barb core 7. A return spring 16 is sleeved on the outside of the control rod 15. The return spring 16 is disposed between the barb core 7 and the storage area 5. The return spring 16 pushes the barb core 7 out of the storage area 5.

[0090] A propulsion tube 17 is disposed on the extrusion chamber 11 and communicates with the first space 13;

[0091] The liquid inlet pipe 18 is arranged on the extrusion chamber 11 and communicates with the second space 14. A third one-way valve for controlling the one-way entry of liquid into the second space 14 is installed at the end of the liquid inlet pipe 18. The liquid inlet pipe 18 communicates with the release agent source through a pipeline to complete the supply.

[0092] The liquid outlet pipe 19 is arranged on the extrusion chamber 11 and communicates with the second space 14. A fourth one-way valve for controlling the one-way discharge of liquid from the second space 14 is installed at the end of the liquid outlet pipe 19.

[0093] Two pushers are arranged on the barb core 7 to assist demoulding, and the two pushers are communicated with the liquid outlet pipe 19 through a flexible pipe;

[0094] like Fig.15 and Fig.16 As shown, in the embodiment of the present invention, each pusher comprises:

[0095] A reserved channel 20 is provided on the barb core 7;

[0096] The embedded pipe 21 is hidden in the reserved channel 20 of the barb core 7. The tails of the embedded pipes 21 of the two pushers are connected to the liquid outlet pipe 19 through a pipeline. The front end of the embedded pipe 21 is provided with a notch area, and the release agent is discharged through the notch area and the reserved channel 20. A sliding area 22 is opened through the front end of the embedded pipe 21, and a sliding rod 23 is slidably provided in the sliding area 22. The tail of the sliding rod 23 can complete the blocking of the front end of the embedded pipe 21;

[0097] The sealing plug 24 is rotatably arranged at the front end of the sliding rod 23. The sealing plug 24 is hidden in the reserved channel 20 to complete the plugging. An extrusion spring 25 is sleeved on the outside of the sliding rod 23. The extrusion spring 25 is arranged between the sliding area 22 and the sliding rod 23 for resetting. The sealing plug 24 is pulled back to the reserved channel 20 by the extrusion spring 25.

[0098] The arc-shaped slide groove 26 is provided at the front end of the reserved channel 20, and a slide rod 27 is slidably installed in the arc-shaped slide groove 26. The slide rod 27 is fixedly connected to the sealing plug 24, and the arc-shaped slide groove 26 cooperates with the slide rod 27 to complete the rotation guidance of the sealing plug 24;

[0099] It is worth noting that: when performing multiple barb demoulding methods: by providing an internal barb member, when the barb core 7 moves toward the storage area 5 for demoulding, the piston plate 12 is synchronously controlled to move to discharge the demoulding agent stored in the second space 14 through the liquid outlet pipe 19, and then sent into the embedded pipe 21 of the two pushers. The demoulding agent enters the embedded pipe 21 to push the sliding rod 23 to move in the sliding area 22 and overcome the elasticity of the extrusion spring 25. Under this action, the sealing plug 24 extends to separate the molded product from the barb core 7, which can play a pushing role. At the same time, under the design of the arc-shaped slide groove 26, the sealing plug 2 When the sealing plug 24 is pushed out, it is guided by the trajectory line of the arc-shaped slide groove 26, so that the sealing plug 24 generates a rotation amount, which further improves the separation effect between the sealing plug 24 and the molded product, facilitates demoulding, avoids the problem of adhesion, and the demoulding agent continuously flows out from the gap between the sealing plug 24 and the reserved channel 20, further improving the demoulding effect of the barb core 7, thereby completing the multi-mode demoulding process, improving the demoulding efficiency, avoiding the problem of damage to the molded product, and when the piston plate 12 is subsequently reset and moved, the external demoulding agent is introduced into the second space 14 again to wait for use, and the sealing plug 24 is reset at the same time.

[0100] Among them, the driving motor 35, the first electromagnetic clutch 37, the second electromagnetic clutch 42 and other electrical components are all connected to switches through wires, and the switches are electrically connected to the controller, and the specific structure of the controller is not limited.

[0101] Embodiment 2: Based on the demoulding mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the demoulding mechanism.

[0102] like Figure 4 , Figure 5 and Figure 6 As shown, the demoulding mechanism includes:

[0103] The second electromagnetic clutch 42 is sleeved on the outside of the driving shaft 36, and an outer gear ring 43 is installed on the outside of the second electromagnetic clutch 42 through a bracket transmission. Specifically, the fixed end of the second electromagnetic clutch 42 is connected to the driving shaft 36, and the rotating end of the second electromagnetic clutch 42 is connected to the outer gear ring 43. After the fixed end and the rotating end of the second electromagnetic clutch 42 are transmission-connected, the power is transmitted to the outer gear ring 43;

[0104] Two ejector parts are symmetrically and slidably arranged on both sides of the lower mold 1, and the power transmission of the two ejector parts is completed through the outer gear ring 43, and the gap demoulding processing of multiple inner hook parts and products is completed through the two ejector parts;

[0105] Each ejector assembly includes:

[0106] The demoulding ejector pin 44 is slidably arranged on the lower mold 1 and extends to the molding insert 3. A sliding area cooperating with the demoulding ejector pin 44 is arranged on the lower mold 1 and the molding insert 3, which can limit the upper and lower limit movement range of the demoulding ejector pin 44. A retaining ring is arranged at the bottom of the demoulding ejector pin 44. A limiting spring 45 is sleeved on the outside of the demoulding ejector pin 44. The limiting spring 45 is arranged between the retaining ring and the lower mold 1. The demoulding ejector pin 44 is pushed to hide in the molding insert 3 by the limiting spring 45. The elastic coefficient of the limiting spring 45 is greater than the elastic coefficient of the reset spring 16 of the multiple inner hooks, which can achieve stable control.

[0107] The control area 46 is arranged at the bottom of the demoulding ejector pin 44. A control plate 47 is slidably and sealably installed in the control area 46. A lifting slot is provided in the control area 46 to limit the upward and downward movement of the control plate 47.

[0108] The internal thread sleeve 48 is rotatably mounted on the lower mold 1 through a bracket, a driving gear 49 engaged with the external gear ring 43 is installed at the bottom of the internal thread sleeve 48, a telescopic screw 50 is arranged in the internal thread sleeve 48 through thread engagement, and the top of the telescopic screw 50 is fixedly connected to the bottom of the control board 47;

[0109] The delivery pipe 51 is arranged on the demoulding ejector pin 44 and communicates with the control area 46. The avoidance area matched with the delivery pipe 51 is arranged on the molding insert 3. The control area 46 is communicated with the propulsion pipe 17 of the corresponding inner hook part through the delivery pipe 51, and the delivery pipe 51 is connected with the propulsion pipe 17 through a flexible pipe. A certain amount of liquid medium is injected into the control area 46, and active control of multiple inner hook parts is completed through the liquid medium. The thread directions of the internal threaded sleeve 48 and the telescopic screw 50 are freely set according to processing requirements;

[0110] It is worth noting that: when performing gap demoulding control: a demoulding mechanism is provided, the drive motor 35 is started, the drive shaft 36 is controlled to rotate, the No. 1 electromagnetic clutch 37 is unlocked, and the No. 2 electromagnetic clutch 42 is locked to complete the power transmission, so that the outer gear ring 43 rotates, and the two drive gears 49 and the internal threaded sleeve 48 are driven to rotate through the outer gear ring 43, forcing the telescopic screw 50 to extend, so that the control plate 47 moves up in the control area 46 to squeeze out the medium therein, and is sent into the No. 1 space 13 through the propulsion tube 17, forcing the piston plate 12 to move in the extrusion chamber 11, so that the barb core 7 moves and is stored in the storage area 5, the inner barb is demoulded, and then the control board 47 moves to the top of the control area 46 and contacts the demoulding ejector pin 44, and continuously applies an upward thrust, so that the demoulding ejector pin 44 overcomes the limiting spring 45 and moves upward, and the molded product is ejected as a whole to complete the demoulding, and then the intermittent demoulding operation is completed, which can complete the early demoulding for the inner barb and then eject the molded product as a whole, thereby improving the demoulding efficiency. Subsequently, the demoulding ejector pin 44 is reset, and the control board 47 is reset, so that the medium in the No. 1 space 13 of the multiple inner barb parts is drawn back, and the rapid reset is completed with the cooperation of the reset spring 16, waiting for subsequent production and processing.

[0111] Embodiment 3: Based on the knocking mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the knocking mechanism.

[0112] like Figure 7 , Figure 8 and Fig. 9 As shown, the striking mechanism comprises:

[0113] The annular seat 28 is arranged on the lower die 1, and a plurality of arc-shaped protrusions 29 are arranged in a circular array on the lower surface of the annular seat 28. The starting position height of each arc-shaped protrusion 29 is higher than the ending position height, and the extrusion and pushing are completed through the trajectory line formed by the arc-shaped protrusions 29;

[0114] like Fig.10 As shown, the annular cavity 30 is concentrically arranged below the annular seat 28, and the annular cavity 30 is connected to the lower mold 1 through a bracket. The top of the annular cavity 30 is open, and a sealing ring 31 is rotatably installed at the open position of the top of the annular cavity 30;

[0115] like Fig.11 As shown, a plurality of trigger members are arranged in a circular array on the upper surface of the sealing ring 31, and the plurality of trigger members cooperate with a plurality of arc-shaped protrusions 29 to complete the knocking operation;

[0116] The extrusion ring 32 is provided as a sliding seal in the annular cavity 30, and the extrusion ring 32 is connected with a plurality of triggering members to complete the follow-up movement;

[0117] The inlet pipe 33 is connected to one side of the bottom of the annular cavity 30, and a No. 5 one-way valve for controlling the one-way introduction of the coolant into the annular cavity 30 is installed at the end of the inlet pipe 33;

[0118] The outlet pipe 34 is connected to the other side of the bottom of the annular cavity 30. A No. 6 one-way valve for controlling the one-way outlet of the coolant from the annular cavity 30 is installed at the end of the outlet pipe 34. The outlet pipe 34 is connected to the cooling inlet pipe 9 of the plurality of inner barbs through a pipeline.

[0119] It is worth mentioning that: when performing knocking assistance and forced cooling molding: a knocking mechanism is provided to start the drive motor 35 and control the drive shaft 36 to rotate. At this time, the No. 1 electromagnetic clutch 37 is locked to transmit power to the sealing ring 31 through the transmission frame, and the No. 2 electromagnetic clutch 42 is unlocked without restriction, and then the demolding mechanism does not work. Such a design allows the knocking mechanism and the demolding mechanism to be controlled separately, which is conducive to the stable demolding work, and can be freely controlled and used according to the demolding requirements. Under the control of the drive motor 35, the sealing ring 31 and the multiple trigger parts thereon follow the rotation, and the No. 1 trigger arm 39 and the ball thereon are squeezed and pressed against the annular seat 28 by the knocking spring 41. Therefore, during the rotation, the No. 1 trigger arm 39 of the multiple trigger parts is squeezed by the arc-shaped protrusion 29 to complete the movement, so that the No. 1 trigger arm 39 moves in the trigger sleeve 38. Under this action, the extruder is pushed by the No. 2 trigger arm 40. The pressing ring 32 moves downward in the annular cavity 30 to push the coolant in the annular cavity 30 into the multiple inner barbs, and then the coolant enters the cooling channel 8 through the cooling inlet pipe 9 to complete the cooling and molding, and then the coolant is discharged through the cooling outlet pipe 10 to complete the cooling, and then until the No. 1 trigger arm 39 is separated from the arc-shaped protrusion 29. Since there is a height difference between the tail of the arc-shaped protrusion 29 and the annular seat 28, under the reset push of the knocking spring 41, the No. 1 trigger arm 39 moves toward the annular seat 28 to reset and produce a knocking effect. At the same time, the extrusion ring 32 is controlled by the No. 2 trigger arm 40 to move upward and reset in the annular cavity 30, and the external coolant is sucked into the annular cavity 30 to wait for the next cooling action. Repeating the above actions can obtain continuous knocking actions, and at the same time, the coolant can be synchronously sent into the multiple inner barbs for forced cooling, thereby improving the molding effect of the molded product and avoiding the problem that the cooling of the inner barbs is not thorough and affects the subsequent demolding.

[0120] In an embodiment of the present invention, the knocking mechanism further includes:

[0121] The driving motor 35 is arranged on the lower mold 1 through a bracket;

[0122] The driving shaft 36 is transmission-arranged at the output end of the driving motor 35. A No. 1 electromagnetic clutch 37 is sleeved on the outside of the driving shaft 36. A transmission frame transmission-connected to the sealing ring 31 is sleeved on the outside of the No. 1 electromagnetic clutch 37. Specifically, the fixed end of the No. 1 electromagnetic clutch 37 is connected to the driving shaft 36, and the rotating end of the No. 1 electromagnetic clutch 37 is connected to the transmission frame. After the fixed end and the rotating end of the No. 1 electromagnetic clutch 37 are transmission-connected, the power is transmitted to the sealing ring 31.

[0123] Each trigger includes:

[0124] A trigger sleeve 38 is disposed on the upper surface of the sealing ring 31;

[0125] The first trigger arm 39 is slidably engaged in the trigger sleeve 38. The first trigger arm 39 slides through the top of the trigger sleeve 38. A ball is rotatably installed on the top of the first trigger arm 39, and the ball is in sliding contact with the arc-shaped protrusion 29. The extrusion action of the first trigger arm 39 is completed through the arc-shaped protrusion 29.

[0126] The second trigger arm 40 is arranged at the bottom of the first trigger arm 39, and the second trigger arm 40 slides through the bottom of the trigger sleeve 38 and the sealing ring 31, and the bottom of the second trigger arm 40 is connected to the extrusion ring 32;

[0127] The knock spring 41 is sleeved on the outside of the first trigger arm 39 , and the knock spring 41 is located between the first trigger arm 39 and the trigger sleeve 38 , and the knock spring 41 pushes the first trigger arm 39 to move toward the annular seat 28 .

[0128] Embodiment 4: A method for demoulding an inner hook of an injection mold for an automobile lamp, the demoulding method specifically comprising the following steps:

[0129] Step 1, firstly, control the multiple inner hook parts to reset, and then close the upper mold 2 and the lower mold 1 to perform injection molding;

[0130] Step 2: After injection molding, the upper mold 2 is controlled to separate from the lower mold 1;

[0131] Step 3: The demoulding mechanism first controls the multiple inner hooks to shrink and separate from the molded product, and then the demoulding mechanism continues to move to complete the overall demoulding operation of the molded product;

[0132] Step 4: The inner barb can generate a certain thrust when the inner barb moves during demoulding, so that the inner barb can be effectively separated from the molded product;

[0133] Step 5: The knocking mechanism can provide a stable knocking force, and the knocking mechanism can continuously deliver coolant into the multiple inner hook parts to complete cooling and molding.

[0134] The present invention provides an internal hook demoulding mechanism and method for an automobile lamp injection mold. The specific working principle is as follows: first, a plurality of internal hooks are controlled to reset, and then an upper mold 2 and a lower mold 1 are molded together for injection molding. After injection molding, the upper mold 2 and the lower mold 1 are controlled to separate. By providing a demoulding mechanism, the demoulding mechanism can perform intermittent control on a plurality of internal hooks and a molded product, so that when the demoulding mechanism is in action, the plurality of internal hooks are first controlled to shrink and separate from the molded product, and then the demoulding mechanism continues to act to complete the overall demoulding operation of the molded product. By adopting a gap advancement design, the early demoulding control can be completed for the internal hooks of the molded product to avoid the problem of damage to the molded product. At the same time, the design of the internal hooks is adopted to force the internal hooks to shrink and separate from the molded product. The demoulding agent is sprayed out by itself, and the inner hook part can generate a certain thrust when it moves during demoulding, so that the inner hook part and the molded product can be effectively separated to avoid the problem of adhesion. At the same time, multiple demoulding operations are adopted to improve the success rate of demoulding and avoid damage to the molded product. By providing a knocking mechanism, the design of the knocking mechanism can provide a stable knocking force in the early stage of demoulding, accelerate the separation of the molding insert 3 and the molded product, and help shorten the demoulding process. At the same time, when the knocking mechanism is running, the coolant can be continuously sent into multiple inner hook parts to complete cooling and molding, avoiding the problem that the inner hook area is not thoroughly cooled and affects the demoulding effect, so that the molded product can complete the rapid demoulding work, improve the yield rate, and reduce the scrap amount.

[0135] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0136] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An internal hook demoulding mechanism for an automobile lamp injection mold, comprising a lower mold and an upper mold, wherein a molding insert is arranged on the lower mold, and a molding cavity cooperating with the molding insert is arranged on the upper mold, characterized in that: Also includes: Multiple inner hooks are distributed on the molding insert to complete the molding operation of the lamp product; A knocking mechanism is arranged on the lower mold to provide a demoulding knocking operation. The knocking mechanism is divided into an action unit and a curing unit. The action unit completes a continuous knocking action on the lower mold, and the curing unit is connected with a plurality of inner hooks to complete a cooling and molding operation. The demoulding mechanism is arranged on the lower mold and the molding insert for demoulding the automotive lamp product. The demoulding mechanism and the knocking mechanism complete the power connection, and the demoulding mechanism is actively controlled by the knocking mechanism. At the same time, the multiple inner hooks of the demoulding mechanism are connected to complete the control, and the demoulding operation is completed by intermittently controlling the multiple inner hooks and the automotive lamp product through the demoulding mechanism; Each inner barb piece includes: The control seat is hidden in the molded insert, a storage area is opened at the front end of the control seat, and an installation area is opened through the rear end of the control seat; The barb core is slidably arranged in the receiving area of ​​the control seat, a cooling channel is arranged in the barb core, a cooling inlet pipe communicating with the cooling channel is installed on one side of the tail of the barb core, and a cooling outlet pipe communicating with the cooling channel is installed on the other side of the tail of the barb core; The striking mechanism comprises: An annular seat is arranged on the lower die, and a plurality of arc-shaped protrusions are arranged in a circular array on the lower surface of the annular seat; The annular cavity is concentrically arranged below the annular seat, and the annular cavity is connected to the lower die through a bracket. The top of the annular cavity is open, and a sealing ring is rotatably installed at the open position of the top of the annular cavity. A plurality of triggering members are arranged in a circular array on the upper surface of the sealing ring, and the plurality of triggering members cooperate with a plurality of arc-shaped protrusions to complete the knocking operation; An extrusion ring, a sliding seal is arranged in the annular cavity, and the extrusion ring is connected with a plurality of triggering members to complete the follow-up movement; An inlet pipe is connected and arranged at one side of the bottom of the annular cavity; The lead-out pipe is connected and arranged at the other side of the bottom of the annular cavity, and the lead-out pipe is connected with the cooling inlet pipes of the plurality of inner barb parts through a pipeline.

2. The inner hook demoulding mechanism for an automobile lamp injection mold according to claim 1, characterized in that: Each inner barb also includes: The extrusion chamber is arranged in the installation area, and a piston plate is installed in the extrusion chamber in a sliding and sealing manner, and the piston plate divides the extrusion chamber into a first space and a second space; A control rod is arranged between the piston plate and the barb core, and a return spring is sleeved on the outside of the control rod; A propulsion tube, arranged on the extrusion chamber and communicating with the first space; A liquid inlet pipe, which is arranged on the extrusion chamber and communicates with the second space; A liquid outlet pipe is arranged on the extrusion cavity and communicates with the second space; Two pushers are arranged on the barb core to assist in demoulding, and the two pushers are communicated with the liquid outlet pipe.

3. The inner hook demoulding mechanism for an automobile lamp injection mold according to claim 2, characterized in that: Each pusher includes: A reserved channel is arranged on the barb core; The embedded pipe is hidden in the reserved channel of the barb core, a sliding area is provided through the front end of the embedded pipe, and a sliding rod is slidably provided in the sliding area; The sealing plug is rotatably arranged at the front end of the sliding rod, the sealing plug is hidden in the reserved channel to complete the plugging, and an extrusion spring is sleeved on the outside of the sliding rod; An arc-shaped slide groove is arranged at the front end of the reserved channel, and a slide rod is slidably installed in the arc-shaped slide groove, and the slide rod is fixedly connected to the sealing plug.

4. The inner hook demoulding mechanism for an automobile lamp injection mold according to claim 3, characterized in that: The striking mechanism also includes: A driving motor is arranged on the lower die through a bracket; The drive shaft is arranged at the output end of the drive motor, a No. 1 electromagnetic clutch is sleeved on the outside of the drive shaft, and a transmission frame connected to the sealing ring is sleeved on the outside of the No. 1 electromagnetic clutch.

5. The inner barb demoulding mechanism for an automobile lamp injection mold according to claim 4, characterized in that: Each trigger includes: A trigger sleeve is arranged on the upper surface of the sealing ring; The trigger arm No. 1 is slidably engaged in the trigger sleeve, and the trigger arm No. 1 slides through the top of the trigger sleeve. A ball is rotatably installed on the top of the trigger arm No. 1, and the ball is in sliding contact with the arc-shaped protrusion, and the extrusion action of the trigger arm No. 1 is completed through the arc-shaped protrusion; The second trigger arm is arranged at the bottom of the first trigger arm, and the second trigger arm slides through the bottom of the trigger sleeve and the sealing ring, and the bottom of the second trigger arm is connected to the extrusion ring; The knock spring is sleeved on the outside of the No. 1 trigger arm, and the knock spring is located between the No. 1 trigger arm and the trigger sleeve. The knock spring pushes the No. 1 trigger arm to move toward the annular seat.

6. The inner hook demoulding mechanism for an automobile lamp injection mold according to claim 5, characterized in that: The demoulding mechanism comprises: A No. 2 electromagnetic clutch is sleeved on the outside of the driving shaft, and an outer gear ring is installed on the outside of the No. 2 electromagnetic clutch through a bracket transmission; Two ejector parts are symmetrically and slidably arranged on both sides of the lower mold, and the power transmission of the two ejector parts is completed through the outer gear ring, and the gap demoulding processing of multiple internal hook parts and products is completed through the two ejector parts.

7. The inner hook demoulding mechanism for an automobile lamp injection mold according to claim 6, characterized in that: Each ejector assembly includes: The demoulding ejector pin is slidably arranged on the lower mold and extends to the molding insert. A retaining ring is arranged at the bottom of the demoulding ejector pin, and a limiting spring is sleeved on the outside of the demoulding ejector pin. A control area is arranged at the bottom of the ejector pin, and a control plate is installed in a sliding and sealing manner in the control area; The internal thread sleeve is rotatably mounted on the lower die through a bracket, a driving gear engaged with the external gear ring is installed at the bottom of the internal thread sleeve, a telescopic screw is arranged in the internal thread sleeve through thread engagement, and the top of the telescopic screw is fixedly connected to the bottom of the control board; The conveying pipeline is arranged on the demoulding ejector pin and communicates with the control area, and the control area is communicated with the corresponding inner hook piece through the conveying pipeline.

8. An internal hook demoulding method for an automobile lamp injection mold, using an internal hook demoulding mechanism for an automobile lamp injection mold as claimed in any one of claims 1 to 7, characterized in that: The demoulding method specifically comprises the following steps: Step 1, firstly, control the multiple inner barbs to reset, and then close the upper mold and the lower mold to perform injection molding; Step 2: After injection molding, control the upper mold and the lower mold to separate; Step 3: The demoulding mechanism first controls the multiple inner hooks to shrink and separate from the molded product, and then the demoulding mechanism continues to move to complete the overall demoulding operation of the molded product; Step 4: The inner barb can generate a certain thrust when the inner barb moves during demoulding, so that the inner barb can be effectively separated from the molded product; Step 5: The knocking mechanism can provide a stable knocking force, and the knocking mechanism can continuously deliver coolant into the multiple inner hook parts to complete cooling and molding.

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