A multi-cavity high-efficiency injection mold base for automotive electronics products

Abstract

This invention relates to the field of injection mold base technology, specifically a multi-cavity high-efficiency injection mold base for automotive electronic products. It includes a support frame with an injection feed pipe fixedly mounted on it, a fixed mold base rotatably connected to the support frame, four upper molds rotatably connected to the fixed mold base, each upper mold rotatably connected to the injection feed pipe, a positioning motor driven by the fixed mold base on the support frame, a lifting frame rotatably mounted on the support frame, a discharge frame rotatably connected to the discharge frame, a tilting frame rotatably connected to the discharge frame, a moving mold base rotatably connected to the tilting frame, and four lower molds rotatably connected to the moving mold base. The beneficial effects of this invention are: by driving the moving mold base and lower molds through a transmission mechanism to achieve cyclic variable-angle reciprocating rotation, combined with the synchronous linkage design of the fixed mold base and upper molds, it utilizes centrifugal force and periodic extrusion to break the limitations of traditional fixed-cavity static filling.

Description

Technical Field

[0001] This invention relates to the field of injection mold base technology, specifically a multi-cavity high-efficiency injection mold base for automotive electronic products. Background Technology

[0002] With the continuous advancement of energy conservation, emission reduction, new energy, and lightweighting trends in the automotive industry, the demand for automotive electronic products and high-strength plastic air tanks for vehicles is increasing. These products often have complex structural features such as thin walls, narrow flow channels, irregular cavities, or deep cavities and multiple cavities, which puts forward stringent requirements on the precision, efficiency, and product consistency of injection molding. As the core equipment for molding these products, the structural design of the injection mold directly determines the production quality and capacity.

[0003] In the prior art, multi-cavity injection molds have been used to some extent. For example, patent document CN208375815U discloses an injection mold that achieves mass production by setting multiple mold cavities. However, in practical applications, it still exposes many technical defects, the specific problems of which are as follows:

[0004] Existing multi-cavity injection molds suffer from incomplete filling of molten material and poor consistency of multi-cavity products when molding complex structural parts with thin walls, narrow flow channels, and irregular cavities. Furthermore, the separation of mold cavity cleaning and blanking processes leads to low production efficiency.

[0005] Based on this, the present invention provides a multi-cavity high-efficiency injection mold base for automotive electronic products to solve the problems mentioned in the background art. Summary of the Invention

[0006] This invention addresses the technical problems existing in the prior art by providing a multi-cavity high-efficiency injection mold base for automotive electronic products. This solves the problems of incomplete filling of molten material, poor consistency of multi-cavity products, and low production efficiency caused by the separation of mold cavity cleaning and blanking processes in existing injection mold bases.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A multi-cavity high-efficiency injection mold base for automotive electronic products, including a bracket on which an injection feed tube is fixedly mounted, and further comprising:

[0008] The fixed mold base is rotatably connected to the bracket. Four upper molds are rotatably connected to the fixed mold base. Each upper mold is rotatably connected to the injection feed tube. The bracket is equipped with a positioning motor that is drively connected to the fixed mold base.

[0009] The lifting frame is mounted on the support and can be raised and lowered. A material unloading frame is rotatably connected to the lifting frame, a tilting frame is rotatably connected to the material unloading frame, a moving mold base is rotatably connected to the tilting frame, and four lower molds are rotatably connected to the moving mold base. Each lower mold has an injection cavity that is compatible with the upper mold.

[0010] Both CCD vision probes are fixedly mounted on the unloading turntable and are configured to acquire alignment mark images of the upper mold.

[0011] The transmission mechanism is configured to drive the tilting frame to complete a 180° tilt and drive the moving mold base to drive the lower mold to perform a cyclical variable angle reciprocating rotation of 40°, 60° and 80°.

[0012] Ejection mechanism, used for ejecting injection molded parts;

[0013] An air-washing mechanism is used to air-wash the injection mold cavity after the injection molded part is ejected.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] As a preferred technical solution of the present invention, an incomplete gear is fixedly mounted on the output shaft of the positioning motor, a rotary gear is fixedly mounted on the fixed mold base, the incomplete gear is meshed with the rotary gear, an electric rotary table is fixedly mounted on the bracket, the rotation surface of the electric rotary table is fixedly connected to the unloading turntable, a first linear drive module is mounted on the bracket, and the first linear drive module is connected to the lifting frame in a transmission connection.

[0016] As a preferred technical solution of the present invention, the transmission mechanism includes a tilting motor and a transmission motor fixedly mounted on the unloading rotating frame. A tilting shaft is fixedly mounted on the tilting frame. The output shaft end of the tilting motor is fixedly connected to the tilting shaft. A transmission wheel driven by the transmission motor is rotatably connected to the tilting shaft. Along the circumferential direction, the transmission wheel is alternately provided with three sector-shaped toothed areas and three toothless arc segments. A central shaft and a coupling are rotatably connected to the tilting frame. A torsion spring is provided at the rotatable connection between the central shaft and the tilting frame. A first synchronous belt is transmitted between the coupling and the central shaft. A reciprocating gear is fixedly mounted on the coupling. When the transmission wheel rotates, the three sector-shaped toothed areas alternately mesh with the reciprocating gear, and the driving angles of the three sector-shaped toothed areas on the reciprocating gear are different. The moving mold base and the lower mold are both driven by the central shaft.

[0017] As a preferred embodiment of the present invention, an intermediate bevel gear is fixedly installed on the central shaft, a rotary shaft is fixedly installed at the bottom axis of the moving mold base, a hollow rotary shaft is rotatably sleeved on the rotary shaft, a first bevel gear is installed on both the rotary shaft and the hollow rotary shaft, both of the first bevel gears are meshed with the intermediate bevel gear, and the two first bevel gears are symmetrically distributed about the horizontal plane of the axis of the central shaft, an internal gear ring is fixedly installed on the hollow rotary shaft, an external meshing gear is fixedly installed on each of the lower molds, the external meshing gear is meshed with the internal gear ring, a drive sleeve shaft is rotatably sleeved on the flipping shaft, a second bevel gear is fixedly installed on both the output shaft of the transmission motor and the drive sleeve shaft, the two second bevel gears are orthogonally meshed, and a second synchronous belt is connected between the drive sleeve shaft and the transmission wheel.

[0018] As a preferred technical solution of the present invention, the central angles corresponding to the three sector tooth regions are 40°, 60° and 80° respectively, and the central angles corresponding to the three toothless arc segments are all 60°.

[0019] As a preferred embodiment of the present invention, the ejection mechanism includes a second linear drive module fixedly mounted on a tilting frame. An ejection frame is drivenly connected to the second linear drive module. The ejection frame is slidably connected to the tilting frame. A driven pusher is rotatably connected to the ejection frame. A follower rotary seat is rotatably connected to the follower pusher at the position corresponding to each of the four lower molds. Two ejection rods are fixedly mounted on each follower rotary seat. The ejection rods on each follower rotary seat are slidably connected to the lower mold at the corresponding position. A return spring is fixedly mounted between each follower rotary seat and the corresponding lower mold.

[0020] As a preferred technical solution of the present invention, the air washing mechanism includes a pneumatic cleaning pump fixedly mounted on a tilting frame, a cap installed at the top of each ejector rod, four air washing holes arrayed on the cap, a gas guiding cavity opened in the driven pusher, a corrugated metal pipe connected to the air outlet of the pneumatic cleaning pump, a rotary joint fixedly connected to the other end of the corrugated metal pipe, the rotary joint being rotatably connected to the gas guiding cavity, and a gas distribution channel connected to the gas guiding cavity opened in the ejector rod, with each air washing hole connected to the gas distribution channel.

[0021] As a preferred technical solution of the present invention, the air washing hole is inclined downward, and the axis of the air washing hole is inclined downward at 45° with the axis of the ejector rod, facing the inner wall and bottom of the injection mold cavity.

[0022] As a preferred technical solution of the present invention, it also includes a machine base, the bracket is fixedly mounted on the machine base, a central control unit is fixedly installed on the end face of the machine base, the data end of the CCD vision probe is connected to the central control unit, a conveyor belt drive module is installed on one side of the bracket, and an annular conveyor belt is driven and connected to the conveyor belt drive module.

[0023] As a preferred technical solution of the present invention, a material distribution ring is rotatably connected to the injection feed pipe, and four material guide branches are fixedly connected to the material distribution ring. The four material guide branches are rotatably connected to the inner cavities of the four upper molds respectively.

[0024] The beneficial effects of this invention are:

[0025] 1. This invention drives the moving mold base and the lower mold to achieve cyclical variable-angle reciprocating rotation through a transmission mechanism. Combined with the synchronous linkage design of the fixed mold base and the upper mold, it utilizes centrifugal force and periodic extrusion to break the limitations of traditional static filling of fixed mold cavities. This allows molten material to flow rapidly and fully fill thin-walled, narrow flow channels and irregular cavities. At the same time, the material distribution ring and four guide pipes achieve uniform distribution of raw materials. The CCD vision probe collects data in real time and feeds it back to the central control unit. With the precise alignment mechanism driven by the positioning motor, it ensures that the four upper molds and the lower mold are always precisely aligned. From raw material supply and mold alignment to dynamic filling, a full-process synergy is formed, which makes the molding density and dimensional accuracy of multi-cavity products highly consistent, solving the problem of consistency in multi-cavity injection molding of complex structural parts.

[0026] 2. This invention solves the problem of low production efficiency caused by the separation of mold cavity cleaning and unloading processes in the prior art. It achieves seamless process connection through the integrated linkage of multiple mechanisms. The ejection mechanism and the air washing mechanism share the ejection rod carrier. After the ejection rod is driven by the second linear drive module to complete the smooth ejection of the molded part, the pneumatic cleaning pump immediately performs precise high-pressure air washing on the mold cavity through the gas guide cavity, the air distribution channel and the 45° inclined air washing hole. There is no need to set up an additional independent cleaning station. At the same time, the flipping motor drives the flipping frame to flip, the electric rotary table drives the unloading frame to rotate, and the ring conveyor belt transports synchronously. It forms a coordinated closed loop with the ejection and air washing actions. From mold opening, transfer, ejection, cleaning to finished product transportation, the entire process does not require manual intervention. It breaks the traditional step-by-step operation mode of injection molding, unloading and cleaning, and greatly shortens the production cycle. Its integrated linkage design significantly improves production efficiency and automation level compared with the decentralized processes of the prior art. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the main body of the mold in the multi-cavity high-efficiency injection mold base for automotive electronic products of the present invention;

[0028] Figure 2This is a schematic diagram of the overall structure of the multi-cavity high-efficiency injection mold base for automotive electronic products according to the present invention;

[0029] Figure 3 For the present invention Figure 2 A structural diagram from another perspective;

[0030] Figure 4 This is a schematic diagram of the structure of the lower mold and the material feeding frame of the present invention;

[0031] Figure 5 This is a cross-sectional structural diagram of the feeding frame and the tilting shaft of the present invention;

[0032] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the local structure at point A;

[0033] Figure 7 For the present invention Figure 5 A magnified view of the structure at point B in the middle;

[0034] Figure 8 This is an exploded structural diagram of the lower mold and the follower rotary seat of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the flipping frame of the present invention;

[0036] Figure 10 For the present invention Figure 9 A magnified schematic diagram of the structure at point C in the middle;

[0037] Figure 11 This is a schematic diagram of the structure of the indexing gear of the present invention.

[0038] The attached diagram lists the components represented by each number as follows:

[0039] 1. Support frame; 2. Injection feed pipe; 3. Fixed mold base; 4. Upper mold; 5. Positioning motor; 6. Lifting frame; 7. Unloading rotating frame; 8. Tilting frame; 9. Moving mold base; 10. Lower mold; 11. CCD vision probe; 12. Incomplete gear; 13. Indexing gear; 14. Electric rotary table; 15. First linear drive module; 16. Tilting motor; 17. Drive motor; 18. Tilting shaft; 19. Drive wheel; 20. Sector toothed area; 21. Central shaft; 22. Coupling; 23. 24. Torsion spring; 25. Reciprocating gear; 26. Rotary shaft; 27. Hollow rotary shaft; 28. Internal gear ring; 29. ​​External meshing gear; 30. Drive sleeve shaft; 31. Second linear drive module; 32. Ejector frame; 33. Driven push frame; 34. Follower rotary seat; 35. Ejector rod; 36. Return spring; 37. Pneumatic cleaning pump; 38. End cap; 39. Air cleaning hole; 40. Gas guide cavity; 41. Air distribution channel; 42. Machine base; 43. Central control unit; 44. Circular conveyor belt. Detailed Implementation

[0040] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0041] The present invention provides the following preferred embodiments.

[0042] like Figure 1-11 As shown, a multi-cavity high-efficiency injection mold base for automotive electronic products includes a bracket 1 on which an injection feed pipe 2 is fixedly mounted, and a machine base 41. The bracket 1 is fixedly mounted on the machine base 41, and a central control unit 42 is fixedly mounted on the end face of the machine base 41. A conveyor belt drive module is mounted on one side of the bracket 1, and an annular conveyor belt 43 is driven and connected to the conveyor belt drive module.

[0043] The bracket 1 is made of high-strength cast steel, which has good rigidity and stability;

[0044] The machine base 41 provides a stable installation foundation for the entire mold frame, ensuring that each component maintains positional accuracy during operation. The central control unit 42 enables centralized control of the entire device, ensuring that the actions of each mechanism are coordinated and consistent.

[0045] The conveyor belt drive module drives the ring conveyor belt 43 to operate continuously, which can automatically transport the finished injection molded products to the next process in a timely manner without manual intervention, greatly reducing production interruption time, improving overall production continuity, and avoiding damage to finished products that may be caused by manual handling, thus improving the product qualification rate.

[0046] Also includes:

[0047] The fixed mold base 3 is rotatably connected to the bracket 1. Four upper molds 4 are rotatably connected to the fixed mold base 3. Each upper mold 4 is rotatably connected to the injection feed pipe 2. The bracket 1 is equipped with a positioning motor 5 that is drively connected to the fixed mold base 3.

[0048] In a preferred embodiment, a material distribution ring is rotatably connected to the injection feed pipe 2, and four material guide branches are fixedly connected to the material distribution ring. The four material guide branches are rotatably connected to the inner cavities of the four upper molds 4 respectively.

[0049] During operation, the injection feed pipe 2 is connected to the external spiral extrusion equipment for molten material and supplies material to this device.

[0050] A sealing ring is fixedly installed at the rotating connection between the material distribution ring and the injection feeding pipe 2;

[0051] An incomplete gear 12 is fixedly mounted on the output shaft of the positioning motor 5, and a rotary gear 13 is fixedly mounted on the fixed mold base 3. The incomplete gear 12 and the rotary gear 13 are meshed and connected. The center angle corresponding to the effective meshing arc segment on the incomplete gear 12 is 60°. When the moving mold base 9 rotates, the effective meshing arc segment on the incomplete gear 12 is misaligned with the rotary gear 13, thereby enabling the upper mold 4 to rotate synchronously with the lower mold 10.

[0052] When the upper mold 4 and the lower mold 10 are docked or aligned, the position of the upper mold 4 can be finely adjusted by the positioning motor 5, so as to facilitate the precise docking of the upper mold 4 and the lower mold 10.

[0053] A damping washer is fixedly installed at the rotating connection between the upper mold 4 and the fixed mold base 3, so as to realize the self-limiting of the upper mold 4 in the non-working state;

[0054] The material distribution ring, together with four material guide branches, achieves uniform distribution of molten material in the injection feed pipe 2 to the four upper molds 4, ensuring that each upper mold 4 can obtain sufficient and equal amounts of raw materials, thus guaranteeing the consistency of multi-cavity injection molded products.

[0055] The positioning motor 5 can precisely control the intermittent rotation of the fixed mold base 3 through the meshing transmission of the incomplete gear 12 and the indexing gear 13, thereby driving the upper mold 4 to achieve step-by-step alignment. The misalignment design of the incomplete gear 12 and the indexing gear 13 allows the upper mold 4 to follow synchronously when the moving mold base 9 rotates, avoiding interference problems in the mold docking process.

[0056] A damping washer is provided at the rotating connection between the upper mold 4 and the fixed mold base 3;

[0057] The damping washer enables the upper mold 4 to self-limit when it is not working, preventing it from rotating randomly and affecting the alignment accuracy. The positioning motor 5, in conjunction with the encoder and the central control unit 42, can finely adjust the position of the upper mold 4 according to the feedback of the CCD vision probe 11, ensuring that the upper mold 4 and the lower mold 10 are accurately connected, effectively improving the molding accuracy of injection molded products.

[0058] The lifting frame 6 is mounted on the support 1 in a height-adjustable manner. The lifting frame 6 is rotatably connected to the unloading rotating frame 7, and the unloading rotating frame 7 is rotatably connected to the tilting frame 8.

[0059] A first linear drive module 15 is installed on the bracket 1. The first linear drive module 15 is connected to the lifting frame 6 in a transmission. An electric rotary table 14 is fixedly installed on the bracket 1. The rotating surface of the electric rotary table 14 is fixedly connected to the unloading rotating frame 7.

[0060] A moving mold base 9 is rotatably connected to the flipping frame 8, and four lower molds 10 are rotatably connected to the moving mold base 9. Each lower mold 10 is provided with an injection mold cavity that is compatible with the upper mold 4.

[0061] Two CCD vision probes 11 are fixedly mounted on the unloading turntable 7 and are configured to acquire alignment mark images of the upper mold 4. The data terminals of the CCD vision probes 11 are connected to the central control unit 42.

[0062] The central control unit 42 has a built-in image recognition algorithm;

[0063] The first linear drive module 15 drives the lifting frame 6 to rise and fall, and can flexibly adjust the distance between the moving mold base 9 and the fixed mold base 3 to meet the mold closing and opening action requirements, and adapt to the injection molding of products with different thicknesses.

[0064] The electric rotary table 14 drives the unloading frame 7 to rotate, which can transfer the injection-molded lower mold 10 to the top of the circular conveyor belt 43 for unloading, and at the same time transfer the un-injected lower mold 10 to the mold closing station, realizing the cyclic switching of the station.

[0065] Two CCD vision probes 11 collect the orientation image data of the upper mold 4 in real time and feed it back to the central control unit 42, providing a precise basis for the fine adjustment of the fixed mold base 3. This effectively solves the problems of low alignment accuracy of traditional mold base molds, easy overflow or molding defects, and ensures the consistency and reliability of the connection of each mold in the multi-cavity injection molding process.

[0066] The transmission mechanism is configured to drive the flipping frame 8 to complete a 180° flip and drive the moving mold base 9 to drive the lower mold 10 to perform a cyclic variable angle reciprocating rotation of 40°, 60° and 80°.

[0067] The transmission mechanism includes a tilting motor 16 and a transmission motor 17 fixedly mounted on the unloading rotating frame 7. A tilting shaft 18 is fixedly mounted on the tilting frame 8. The output shaft end of the tilting motor 16 is fixedly connected to the tilting shaft 18. A transmission wheel 19 driven by the transmission motor 17 is rotatably connected to the tilting shaft 18.

[0068] Along the circumferential direction, the transmission wheel 19 is alternately provided with three sector toothed areas 20 and three toothless arc segments. The tilting frame 8 is rotatably connected to the central shaft 21 and the coupling 22. The central shaft 21 and the tilting frame 8 are provided with a torsion spring 23. The coupling 22 and the central shaft 21 are connected by a first synchronous belt. The coupling 22 is fixedly mounted with a reciprocating gear 24. When the transmission wheel 19 rotates, the three sector toothed areas 20 are alternately engaged with the reciprocating gear 24, and the driving angles of the three sector toothed areas 20 on the reciprocating gear 24 are different. The moving mold base 9 and the lower mold 10 are both driven by the central shaft 21.

[0069] A central bevel gear is fixedly mounted on the central shaft 21. A rotary shaft 25 is fixedly mounted on the bottom axis of the moving mold base 9. A hollow rotary shaft 26 is rotatably sleeved on the rotary shaft 25. Both the rotary shaft 25 and the hollow rotary shaft 26 are equipped with first bevel gears. Both first bevel gears are meshed with the central bevel gear. The two first bevel gears are symmetrically distributed about the horizontal plane of the axis of the central shaft 21. An internal gear ring 27 is fixedly mounted on the hollow rotary shaft 26. An external meshing gear 28 is fixedly mounted on each lower mold 10. The external meshing gear 28 is meshed with the internal gear ring 27. A drive sleeve shaft 29 is rotatably sleeved on the flip shaft 18. Second bevel gears are fixedly mounted on the output shaft of the transmission motor 17 and the drive sleeve shaft 29. The two second bevel gears are orthogonally meshed. A second synchronous belt is connected between the drive sleeve shaft 29 and the transmission wheel 19.

[0070] The central angles corresponding to the three sector toothed areas 20 are 40°, 60° and 80° respectively, and the central angles corresponding to the three toothless arc segments are all 60°.

[0071] The flipping motor 16 drives the flipping frame 8 to flip through the flipping shaft 18, realizing the flipping and unloading of the lower mold 10. Combined with the rotation of the unloading frame 7, the unloading efficiency is greatly improved.

[0072] The drive motor 17 drives the drive wheel 19 to rotate via the second bevel gear, drive sleeve shaft 29, and second synchronous belt. The three sector tooth areas 20 with different center angles on the drive wheel 19 alternately mesh with the reciprocating gear 24. Combined with the reset action of the torsion spring 23, the coupling 22 drives the central shaft 21 to achieve cyclic variable angle reciprocating rotation. Then, through the meshing transmission of the intermediate bevel gear and the two symmetrically arranged first bevel gears, the rotary shaft 25 and the hollow rotary shaft 26 are driven to rotate in opposite directions. The hollow rotary shaft 26 meshes with the external meshing gear 28 of the lower mold 10 through the internal gear ring 27, driving the four lower molds 10 to rotate synchronously, thus realizing the cyclic variable angle reciprocating rotation of the moving mold base 9 and the lower mold 10.

[0073] Automotive electronic products often have complex structures such as thin walls, narrow flow channels, and irregular cavities. In traditional fixed-cavity injection molding, the molten material is prone to problems such as local material shortage and incomplete filling due to differences in flow resistance. This device dynamically adjusts the relative motion state between the mold cavity and the material by reciprocating rotation with a variable cycle. It uses centrifugal force to accelerate the material to flow into the dead corners and narrow flow channels of the mold cavity, breaking through the resistance limitations of static filling and ensuring that complex structural parts are completely filled. At the same time, the rotation speed changes in different cycles form a periodic extrusion on the molten material. Especially in the later stage of injection, the slow rotation combined with the mold closing pressure can compact the tiny shrinkage cavities in the material, thereby improving the internal density uniformity of the product. Meanwhile, the four lower molds 10 achieve synchronous variable-cycle rotation through the meshing of the internal gear ring 27 and the hollow rotating shaft 26, ensuring that the material filling trajectory and stress state of each mold cavity are completely consistent.

[0074] Ejection mechanism, used for ejecting injection molded parts;

[0075] The ejection mechanism includes a second linear drive module 30 fixedly mounted on the tilting frame 8. An ejection frame 31 is connected to the second linear drive module 30. The ejection frame 31 is slidably connected to the tilting frame 8. A driven push frame 32 is rotatably connected to the ejection frame 31. A follower rotary seat 33 is rotatably connected to the follower push frame 32 at the positions corresponding to the four lower molds 10. Two ejection rods 34 are fixedly mounted on each follower rotary seat 33. The ejection rods 34 on each follower rotary seat 33 are slidably connected to the lower mold 10 at the corresponding position. A return spring 35 is fixedly mounted between each follower rotary seat 33 and the corresponding lower mold 10.

[0076] The second linear drive module 30 drives the ejector frame 31 to slide, which in turn drives the ejector rod 34 on the driven pusher 32 and the follower rotary seat 33 to slide along the lower mold 10, thus realizing the smooth ejection of the injection molded part and avoiding the mold deformation or jamming problems that are easily caused by traditional ejection mechanisms.

[0077] The return spring 35 between the follower rotary table 33 and the lower mold 10 can drive the ejector rod 34 to quickly return to its original position after the ejection action is completed, thus preparing for the next injection and improving the efficiency of the cycle operation.

[0078] The design of each lower mold 10 corresponding to two ejector rods 34 ensures uniform force on the mold part, further guarantees the integrity of the mold part during the ejection process, reduces the product damage rate, and meets the precision molding requirements of automotive electronic products.

[0079] In a preferred embodiment, heating tubes and temperature sensors are embedded in both the upper mold 4 and the lower mold 10. The heating tubes are electrically connected to the central control unit 42, and the temperature sensors provide real-time feedback on the temperature of the upper mold 4 and the lower mold 10 to ensure that the mold temperature is maintained at 65℃±5℃.

[0080] In a preferred embodiment, a cooling mechanism is also included, comprising cooling channels formed in the upper mold 4 and the lower mold 10, through which cooling water at 20-25°C is introduced, and the cooling time is 5-8 seconds, for rapid cooling and shaping of the injection molded parts.

[0081] An air-washing mechanism is used to air-wash the injection mold cavity after the injection molded part is ejected.

[0082] The air washing mechanism includes a pneumatic cleaning pump 36 fixed on the tilting frame 8. Each ejector rod 34 has a cap 37 installed at its top end. Four air washing holes 38 are arrayed on the cap 37. A gas guiding cavity 39 is opened in the driven pusher 32. The air outlet of the pneumatic cleaning pump 36 is connected to a corrugated metal pipe. The other end of the corrugated metal pipe is fixedly connected to a rotary joint. The rotary joint is rotatably connected to the gas guiding cavity 39. A gas distribution channel 40 is opened in the ejector rod 34 and is connected to the gas guiding cavity 39. Each air washing hole 38 is connected to the gas distribution channel 40.

[0083] The air purging hole 38 is inclined downwards, and the axis of the air purging hole 38 is inclined downwards at 45° with the axis of the ejector rod 34, facing the inner wall and bottom of the injection mold cavity.

[0084] The high-pressure gas generated by the pneumatic cleaning pump 36 enters the gas guide cavity 39 through the corrugated metal pipe and rotary joint, and then is ejected from the gas cleaning hole 38 of the end cap 37 through the gas distribution channel 40 in the ejector rod 34, thus realizing automatic gas cleaning of the injection mold cavity.

[0085] The air washing hole 38, which is set at a downward angle of 45°, allows high-pressure gas to accurately flush the residual material on the inner wall of the mold cavity, resulting in a more thorough cleaning effect and preventing residual material from affecting the quality of the next injection molded product.

[0086] During air washing, the pneumatic cleaning pump 36 outputs a gas pressure of 0.8MPa±0.1MPa, a flow rate of 50-80L / min, and a washing time of 3-5s to ensure that residual materials in the injection mold cavity are completely removed.

[0087] The air cleaning mechanism and the ejection mechanism are integrated into one design, which completes the cleaning of the mold cavity while ejecting the mold part. There is no need to set up an additional independent cleaning station, which shortens the production cycle and improves production efficiency. At the same time, the flexible design of the corrugated metal tube is adapted to the rotation of the flipping frame 8 and the driven push frame 32, and the rotary joint ensures the continuity and sealing of gas delivery, avoiding the decline in cleaning effect caused by gas leakage.

[0088] The specific steps for using this invention are as follows:

[0089] The machine base 41 provides a stable installation foundation for the overall mold frame. First, the injection feed pipe 2 is connected to the external spiral extrusion equipment to supply material. Through the material distribution ring and four guide branches, the material is evenly distributed to the four upper molds 4 on the fixed mold base 3. The positioning motor 5 drives the fixed mold base 3 to rotate intermittently by meshing the incomplete gear 12 and the indexing gear 13. At the same time, two CCD vision probes 11 collect the orientation data of the upper molds 4 in real time and feed it back to the central control unit 42 so as to make precise fine adjustments to the orientation of the upper molds 4.

[0090] Subsequently, the first linear drive module 15 drives the lifting frame 6 to rise and fall, causing the moving mold base 9 connected to the lifting frame 6 via the unloading rotating frame 7 and the flipping frame 8 to move down, allowing the four lower molds 10 on the moving mold base 9 to precisely close with the upper mold 4. In the transmission mechanism, the transmission motor 17 drives the transmission wheel 19 to rotate through the second bevel gear, the drive sleeve shaft 29 and the second synchronous belt. Its three alternately arranged sector tooth areas 20 with different center angles mesh with the reciprocating gear 24. Combined with the transmission of the torsion spring 23, the central shaft 21 and the bevel gear set, and through the cooperation of the internal gear ring 27 and the external meshing gear 28 of the lower mold 10, the cyclic variable angle reciprocating rotation of the moving mold base 9 and the lower mold 10 is realized, ensuring that the molten material fully fills the injection mold cavity.

[0091] After injection molding is completed, the lifting frame 6 drives the moving mold base 9 to move up and open the mold. The electric rotary table 14 drives the unloading rotating frame 7 to rotate, transferring the lower mold 10 carrying the molded part to the top of the ring conveyor belt 43. The flipping motor 16 drives the flipping frame 8 to flip. The second linear drive module 30 drives the ejector frame 31, and the molded part is smoothly ejected onto the conveyor belt through the ejector rod 34 on the follower rotating base 33. After ejection, the pneumatic cleaning pump 36 starts. High-pressure gas is sprayed out from the 45° downward inclined air cleaning hole 38 through the corrugated metal pipe, rotary joint, gas guide cavity 39 and the air distribution channel 40 in the ejector rod 34 to thoroughly clean the injection mold cavity. The return spring 35 drives the ejector rod 34 to return to its original position. The conveyor belt transmission module drives the ring conveyor belt 43 to transport the finished product to the next process. All mechanisms work together to repeat the above process to achieve efficient and continuous injection molding production of multiple cavities.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-cavity high-efficiency injection mold base for automotive electronic products, comprising a support (1) on which an injection feed tube (2) is fixedly mounted, characterized in that, Also includes: The fixed mold base (3) is rotatably connected to the bracket (1). Four upper molds (4) are rotatably connected to the fixed mold base (3). Each upper mold (4) is rotatably connected to the injection feed pipe (2). The bracket (1) is equipped with a positioning motor (5) that is connected to the fixed mold base (3) for transmission. The positioning motor (5) is used to drive the fixed mold base (3) to rotate intermittently. The lifting frame (6) is mounted on the support (1) and is rotatably connected to the lifting frame (6). The unloading frame (7) is rotatably connected to the unloading frame (7). The flipping frame (8) is rotatably connected to the flipping frame (8). The moving mold base (9) is rotatably connected to the moving mold base (9). Four lower molds (10) are rotatably connected to the moving mold base (9). Each lower mold (10) has an injection mold cavity that is compatible with the upper mold (4). Two CCD vision probes (11) are fixed on the unloading turntable (7) and configured to acquire alignment mark images of the upper mold (4) for precise fine-tuning of the position of the upper mold (4); The transmission mechanism, after the lower mold (10) and the upper mold (4) are closed and the material is transported to the injection mold cavity, drives the moving mold base (9) to drive the lower mold (10) to perform cyclic variable angle reciprocating rotation of 40°, 60° and 80°; after the injection is completed, the lower mold (10) and the upper mold (4) are opened, and the transmission mechanism is configured to drive the flipping frame (8) to complete 180° flipping; Ejection mechanism, used for ejecting injection molded parts; An air-washing mechanism is used to air-wash the injection mold cavity after the injection molded part is ejected.

2. The multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 1, characterized in that, An incomplete gear (12) is fixedly mounted on the output shaft of the positioning motor (5), and a rotary gear (13) is fixedly mounted on the fixed mold base (3). The incomplete gear (12) and the rotary gear (13) are meshed and connected. An electric rotary table (14) is fixedly mounted on the bracket (1). The rotating surface of the electric rotary table (14) is fixedly connected to the unloading turntable (7). A first linear drive module (15) is mounted on the bracket (1). The first linear drive module (15) is connected to the lifting frame (6) in a transmission connection.

3. The multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 1, characterized in that, The transmission mechanism includes a tilting motor (16) and a drive motor (17) fixedly mounted on the unloading rotating frame (7). A tilting shaft (18) is fixedly mounted on the tilting frame (8). The output shaft end of the tilting motor (16) is fixedly connected to the tilting shaft (18). A drive wheel (19) driven by the drive motor (17) is rotatably connected to the tilting shaft (18). Along the circumferential direction, the drive wheel (19) is alternately provided with three sector-shaped toothed areas (20) and three toothless arc segments. A central shaft (21) and a drive wheel (18) are rotatably connected to the tilting frame (8). The coupling (22) is provided with a torsion spring (23) at the rotational connection between the central shaft (21) and the tilting frame (8). The coupling (22) and the central shaft (21) are connected by a first synchronous belt. The coupling (22) is fixed with a reciprocating gear (24). When the transmission wheel (19) rotates, the three sector tooth areas (20) alternately mesh with the reciprocating gear (24), and the driving angles of the three sector tooth areas (20) on the reciprocating gear (24) are different. The moving mold base (9) and the lower mold (10) are both driven by the central shaft (21).

4. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 3, characterized in that, An intermediate bevel gear is fixedly mounted on the central shaft (21). A rotary shaft (25) is fixedly mounted on the bottom axis of the moving mold base (9). A hollow rotating shaft (26) is rotatably sleeved on the rotary shaft (25). A first bevel gear is mounted on both the rotary shaft (25) and the hollow rotating shaft (26). Both first bevel gears are meshed with the intermediate bevel gear, and the two first bevel gears are symmetrically distributed about the horizontal plane of the central shaft (21). A hollow rotating shaft (26) is fixedly mounted with... An internal gear ring (27) is fixedly mounted on each of the lower molds (10), and the external meshing gear (28) meshes with the internal gear ring (27). A drive sleeve shaft (29) is rotatably mounted on the flip shaft (18). A second bevel gear is fixedly mounted on the output shaft of the transmission motor (17) and on the drive sleeve shaft (29). The two second bevel gears mesh orthogonally. A second synchronous belt is connected between the drive sleeve shaft (29) and the transmission wheel (19).

5. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 3, characterized in that, The central angles corresponding to the three sector toothed areas (20) are 40°, 60° and 80° respectively, and the central angles corresponding to the three toothless arc segments are all 60°.

6. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 1, characterized in that, The ejection mechanism includes a second linear drive module (30) fixedly mounted on the flipping frame (8). An ejection frame (31) is drivenly connected to the second linear drive module (30). The ejection frame (31) is slidably connected to the flipping frame (8). A driven push frame (32) is rotatably connected to the ejection frame (31). A follower rotary seat (33) is rotatably connected to the follower push frame (32) at the position corresponding to the four lower molds (10). Two ejection rods (34) are fixedly mounted on each follower rotary seat (33). The ejection rods (34) on each follower rotary seat (33) are slidably connected to the lower mold (10) at the corresponding position. A return spring (35) is fixedly mounted between each follower rotary seat (33) and the corresponding lower mold (10).

7. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 6, characterized in that, The air washing mechanism includes a pneumatic cleaning pump (36) fixed on a tilting frame (8), a head (37) is installed at the top of each ejector rod (34), four air washing holes (38) are arrayed on the head (37), a gas guiding cavity (39) is opened in the driven pusher (32), the air outlet of the pneumatic cleaning pump (36) is connected to a corrugated metal pipe, the other end of the corrugated metal pipe is fixedly connected to a rotary joint, the rotary joint is rotatably connected to the gas guiding cavity (39), a gas distribution channel (40) is opened in the ejector rod (34) and communicates with the gas guiding cavity (39), and each air washing hole (38) is connected to the gas distribution channel (40).

8. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 7, characterized in that, The air washing hole (38) is inclined downward, and the axis of the air washing hole (38) is inclined downward at 45° with the axis of the ejector rod (34), facing the inner wall and bottom of the injection mold cavity.

9. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 1, characterized in that, It also includes a machine base (41), the bracket (1) is fixedly mounted on the machine base (41), the end face of the machine base (41) is fixedly mounted with a central control unit (42), the data terminal of the CCD vision probe (11) is connected to the central control unit (42) for data connection, a conveyor belt drive module is installed on one side of the bracket (1), and an annular conveyor belt (43) is connected to the conveyor belt drive module for transmission.

10. A multi-cavity high-efficiency injection mold base for automotive electronic products according to claim 1, characterized in that, The injection feed pipe (2) is rotatably connected to a material distribution ring, and the material distribution ring is fixedly connected to four material guide pipes. The four material guide pipes are rotatably connected to the inner cavities of the four upper molds (4).

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