Quick-change mold core type injection mold system suitable for new energy automobile connector

Abstract

The invention relates to the technical field of connectors, in particular to a quick-change mold core type injection mold system suitable for a new energy automobile connector, which comprises a mold frame, a mold core and a base, a quick-change structure is arranged in the mold core, and the quick-change structure comprises a push cylinder, a support frame, a mounting table, a support template and a cavity plate; a cooling device used for assisting demolding is arranged on the surface of the base. According to the structure, the quick-release type mold core structure is adopted, and the effect of quickly replacing the mold core structure can be achieved by replacing the supporting mold plate and the cavity plate; according to the structure, the traditional mode that a whole set of mold core needs to be disassembled, recalibration and positioning are needed, an ejection system is adjusted, and time is consumed is improved, the requirement for replacing products needed by the new energy automobile supply chain in the working procedure in real time is met, machine readjustment is not needed after the structure is replaced, and the first mold can meet the technological requirement.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to a quick-change core injection molding system suitable for connectors in new energy vehicles. Background Technology

[0002] New energy vehicle connectors are high-reliability electrical connection components designed specifically for new energy vehicle models such as electric vehicles, plug-in hybrid electric vehicles, and fuel cell vehicles. They are used to safely and stably transmit electrical energy, signals, or data in high-voltage, high-current, high-vibration, and complex electromagnetic environments.

[0003] A mold is a specialized tool used for molding and processing. Its core function is to give materials specific shapes, sizes, and surface structures. In industrial manufacturing, molds use physical constraints (such as cavities, cores, and pressure plates) to precisely replicate the geometry of the mold cavity of raw materials (such as plastics, metals, rubber, and glass) during heating, pressurization, or curing. This allows for the efficient and mass production of consistent parts or products. However, the mold core process for existing molds used in new energy vehicle connectors is cumbersome and time-consuming. When changing product models, injection molds require complete disassembly of the entire mold core, including separating the mold frame, removing the cavity plate, ejection system, cooling water channels, and positioning elements. This operation is complex, and a single mold change typically takes 30–60 minutes, severely restricting production line flexibility and delivery efficiency. It relies heavily on manual calibration, resulting in low repeatability. After each mold core change, experienced technicians must use dial indicators, plug gauges, and other tools to recalibrate the cavity position, mold closing height, and ejector pin stroke. This is not only inefficient but also susceptible to human error, leading to a low first-mold pass rate. Multiple trial moldings and adjustments are often required to meet process requirements. Therefore, the inventors have proposed a quick-change mold core injection mold system suitable for new energy vehicle connectors to solve the aforementioned technical problems. Summary of the Invention

[0004] To overcome the shortcomings mentioned above, the invention aims to provide a technical solution that can solve the above problems.

[0005] A quick-change mold core injection molding system for connectors in new energy vehicles includes a mold frame, a mold core, and a base. The mold core has a quick-change structure inside, which includes a push cylinder, a support frame, a mounting platform, a support template, and a cavity plate. The surface of the cavity plate has a molding structure. The cavity plate and the mounting platform are detachable. One end of the push cylinder is a push rod. A push plate is provided between the support frame and the support template. One end of the push rod is in contact with the surface of the push plate, and one end of the push plate abuts against the surface of the support template. Both the mold frame and the mold core have receiving cavities inside to accommodate the quick-change structure. The surface of the base has a cooling device to assist in demolding. This structure adopts a quick-release mold core structure. By replacing the support template and the cavity plate, the molding structure on the cavity plate can be replaced at the same time. When replacing, the push cylinder, support frame, mounting platform, support template, and cavity plate need to be pulled out into the mold core, and then the cavity plate on the surface of the mounting platform is replaced to achieve the effect of quick replacement of the mold core structure. This structure improves upon the traditional mold change method, which requires disassembling the entire mold core, recalibrating the positioning, and adjusting the ejection system, taking 30–60 minutes per change. By pushing the cylinder back, the push rod and push plate loosen the support template. Then, the push cylinder, support frame, mounting platform, support template, and cavity plate are extracted as a whole to form an integrated structural component. The detachable cavity plate, or the support template together, can be replaced, achieving a rapid mold core structure change. When the component is reinserted, the new specification product can be produced. This structure can reduce the traditional mold change time of 30–60 minutes per change to 3–8 minutes, meeting the requirements for real-time replacement of products needed in the new energy vehicle supply chain during the process. After replacement, no machine readjustment is required, and the first mold meets the process requirements.

[0006] Furthermore, one end of the support frame extends into the interior of the mold core, the push cylinder is located at the other end of the support frame, the mounting platform is located inside the mold core, and both ends of the mounting platform are provided with limiting plates. The limiting plates are connected to the mold core through positioning rods. The limiting plates and positioning rods constitute a bidirectional rigid limiting mechanism that can restrict the translational freedom of the mounting platform in the X / Y directions, preventing the mounting platform from undergoing micro-displacement due to vibration or cylinder thrust bias during quick change.

[0007] Furthermore, the cooling device includes an air tank and an air pipe. The air tanks are arranged linearly on the surface of the base. One end of the air tank abuts against the air pipe. The bottom of the mounting platform is provided with a fixed seat. The surface of the fixed seat is provided with several connecting pipes that are paired with the air pipes. The bottom of the air tank is provided with a connecting hole for assisting the air tank in inflation. The inside of the mold core is provided with slots that are paired with the connecting pipes for installation. The air tanks are linearly arranged on the base surface, serving as storage and supply units for cooling media such as compressed air or cryogenic inert gas. The fixed base at the bottom of the mounting platform is equipped with connecting pipes. When the quick-change component is inserted into the mold core, the connecting pipes align and insert into the slots inside the mold core, simultaneously abutting against the air pipes on the base to form an air passage. There is no need for manual pipe connection, threading, or quick-connect fitting, achieving simultaneous completion of mechanical positioning and air passage connection. Cooling is automatically connected / disconnected during mold changing, realizing integrated quick change and avoiding the cumbersome operation of traditional water / air passages requiring separate disassembly and assembly. This improves mold changing efficiency and automation level. The airflow reaches the microchannels at the bottom of the cavity plate through the connecting pipes and slots. Compared with overall water cooling, it can avoid internal stress or warping caused by over-cooling, while eliminating the risk of coolant leakage and preventing water vapor from entering the mold cavity and contaminating the product. When the air passage is blocked, only the corresponding connecting pipe needs to be replaced, without disassembling the entire cooling system, reducing maintenance costs.

[0008] Furthermore, the mold frame has an injection port inside, one end of which extends to the surface of the mold frame. A guide sleeve is installed inside the mold frame, and a guide post is provided inside the base to be used in conjunction with the guide sleeve. The guide post penetrates the interior of the mold core and abuts against the surface of the guide sleeve. The guide post and the guide sleeve form a main guide pair, which guides the moving mold and the fixed mold to close along a strictly vertical axis when the mold is closed, so as to avoid displacement due to assembly gaps or thermal deformation.

[0009] Furthermore, the base is provided with a base plate and a fixing plate inside. The surface of the base plate is equipped with a number of ejector pins for ejecting the product. The ejector pins penetrate the surface of the fixing plate and the mold core and extend into the cavity. The fixing plate acts as an intermediate support plate, guiding and limiting the ejector pins in the middle, reducing the deflection of long-stroke ejector pins, and preventing the ejector pins from rubbing and getting stuck with the mold core hole wall.

[0010] Furthermore, the surfaces at both ends of the base are provided with connecting grooves. The connecting grooves have an inward concave structure. During the injection molding process, the mold is subjected to huge clamping force and impact of mold opening and closing. The inward connecting grooves form an embedded locking with the injection molding machine pressure plate / pull rod. Compared with the traditional flat contact of bolts, it is more resistant to lateral slippage, which can disperse local stress and prevent the base edge from deforming or cracking.

[0011] Furthermore, the surface of the push plate is connected to several ejector rods for assisting in the ejection of the product, and the surface of the ejector rods is connected to ejector blocks for auxiliary buffering. The ejector rods are driven by the push plate and can be used for supplementary ejection after the main ejector pin has completed the initial demolding, avoiding breakage, deformation or tearing caused by concentrated single ejection force, and significantly improving the yield of high-complexity connectors. The ejector blocks are used to absorb impact energy and prevent rigid metal ejector rods from directly impacting plastic products.

[0012] Furthermore, the cavity is equipped with a rubber buffer block for auxiliary cushioning. After mold closing or impact, slight rebound or vibration may occur, which may cause the mounting platform to shift. The rubber buffer block provides continuous reaction force after compression, so that the quick-change component can stably fit against the positioning reference surface. Together with the limiting plate and positioning rod, it forms a composite constraint of rigid positioning and elastic clamping, preventing further displacement.

[0013] Furthermore, the support frame is provided with a base frame inside to increase the support force; as a load-bearing component, the support frame bears the push / pull force of the push cylinder and the reaction force of the mold cavity during the injection molding process. The base frame is a crossbeam or closed frame structure, which is embedded or welded into the support frame to form a box-shaped cross section. This structure can effectively improve its bending and torsional stiffness and prevent bending, twisting or fatigue cracking under high pressure.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the structure adopts a quick-release mold core structure. By replacing the support template and the cavity plate, the molding structure on the cavity plate can be replaced at the same time. When replacing, the push cylinder, support frame, mounting platform, support template and cavity plate need to be pulled out into the mold core, and then the cavity plate on the surface of the mounting platform can be replaced to achieve the effect of quick replacement of the mold core structure. This structure improves upon the traditional mold change method, which requires disassembling the entire mold core, recalibrating the positioning, and adjusting the ejection system, taking 30–60 minutes per change. By pushing the cylinder back, the push rod and push plate loosen the support template. Then, the push cylinder, support frame, mounting platform, support template, and cavity plate are extracted as a whole to form an integrated structural component. The detachable cavity plate, or the support template together, can be replaced, achieving a rapid mold core structure change. When the component is reinserted, the new specification product can be produced. This structure can reduce the traditional mold change time of 30–60 minutes per change to 3–8 minutes, meeting the requirements for real-time replacement of products needed in the new energy vehicle supply chain during the process. After replacement, no machine readjustment is required, and the first mold meets the process requirements. Attached Figure Description

[0015] Figure 1 This is a perspective view of the injection mold system in the embodiment; Figure 2 This is another perspective view of the injection mold system in the embodiment; Figure 3 This is a three-dimensional internal structural diagram of the injection mold system in the embodiment; Figure 4 This is an internal structural diagram of the injection mold system from another three-dimensional angle in the embodiment; Figure 5 This is an internal structural diagram of the injection mold system from an axial view angle in the embodiment; Figure 6This is an internal structural diagram of the injection mold system from another axial view angle in the embodiment; Figure 7 This is an exploded view of the injection mold system from a three-dimensional perspective in the embodiment; Figure 8 This is an exploded view of the injection mold system from another perspective in the embodiment; Figure 9 This is an exploded view of the injection mold system from an axial perspective in the embodiment; Figure 10 This is an exploded view of the injection mold system from another axial view angle in the embodiment; Figure 11 This is an exploded view of the overall injection mold system in the embodiment; Figure 12 This is an exploded view of another integral part of the injection mold system in the embodiment; In the diagram: Mold frame-1, Mold core-2, Base-3, Push cylinder-4, Support frame-5, Mounting platform-6, Support template-7, Cavity plate-8, Molding structure-9, Push rod-10, Push plate-11, Receiving cavity-12, Limiting plate-13, Positioning rod-14, Air tank-15, Air pipe-16, Fixed seat-17, Connecting pipe-18, Connecting hole-19, Slot-20, Injection port-21, Guide sleeve-22, Guide post-23, Base plate-24, Fixed plate-25, Ejector pin-26, Connecting groove-27, Ejector rod-28, Ejector block-29, Rubber buffer block-30, Base frame-31. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] For this embodiment, please refer to Figures 1-12The present invention relates to a quick-change core injection molding system for connectors in new energy vehicles, comprising a mold frame 1, a mold core 2, and a base 3. The mold core 2 has a quick-change structure inside, which includes a push cylinder 4, a support frame 5, a mounting platform 6, a support template 7, and a cavity plate 8. A forming structure 9 is formed on the surface of the cavity plate 8. The cavity plate 8 and the mounting platform 6 are detachable. One end of the push cylinder 4 is a push rod 10. A push plate 11 is provided between the support frame 5 and the support template 7. One end of the push rod 10 is in contact with the surface of the push plate 11, and one end of the push plate 11 is in contact with the support template 7. The surface of the template 7 abuts against the mold. The mold frame 1 and the mold core 2 are both provided with a receiving cavity 12 for accommodating the quick-change structure. The surface of the base 3 is provided with a cooling device for assisting demolding. This structure adopts a quick-release mold core structure. By replacing the support template 7 and the cavity plate 8, the molding structure 9 on the cavity plate 8 can be replaced together. When replacing, the push cylinder 4, support frame 5, mounting platform 6, support template 7 and cavity plate 8 need to be pulled out into the mold core 2. Then, the cavity plate 8 on the surface of the mounting platform 6 can be replaced to achieve the effect of quick replacement of the mold core structure. This structure improves upon the traditional mold change method, which requires disassembling the entire mold core, recalibrating the positioning, and adjusting the ejection system, taking 30–60 minutes per change. By retracting the cylinder 4, the push rod 10 and push plate 11 are released from the support template 7. Then, the push cylinder 4, support frame 5, mounting platform 6, support template 7, and cavity plate 8 are extracted as a whole to form an integrated structural component. The detachable cavity plate 8, or the support template 7 together, can be replaced to achieve a rapid mold core structure change. When the component is reinserted, the new specification product can be produced. This structure can reduce the traditional mold change time of 30–60 minutes per change to 3–8 minutes, meeting the requirements for real-time replacement of products needed in the new energy vehicle supply chain during the process. After the change, no machine readjustment is required, and the first mold meets the process requirements.

[0018] One end of the support frame 5 extends into the interior of the mold core 2, and the push cylinder is located at the other end of the support frame 5. The mounting platform 6 is located inside the mold core 2. Both ends of the mounting platform 6 are provided with limiting plates 13. The limiting plates 13 are connected to the mold core 2 through positioning rods 14. The limiting plates 13 and the positioning rods 14 form a bidirectional rigid limiting mechanism, which can limit the translational freedom of the mounting platform 6 in the X / Y directions and prevent the mounting platform 6 from undergoing micro-displacement due to vibration or cylinder thrust bias during quick change.

[0019] The cooling device includes an air tank 15 and an air pipe 16. The air tanks 15 are arranged linearly on the surface of the base 3. One end of the air tank 15 abuts against the air pipe 16. The bottom of the mounting platform 6 is provided with a fixed seat 17. The surface of the fixed seat 17 is provided with several connecting pipes 18 that are paired with the air pipes 16. The bottom of the air tank 15 is provided with a connecting hole 19 for assisting the air tank 15 to be inflated. The inside of the mold core 2 has a slot 20 that is paired with the connecting pipe 18 for installation. Air tanks 15 are linearly arranged on the surface of the base 3, serving as storage and supply units for cooling media such as compressed air or cryogenic inert gas. The fixed base 17 at the bottom of the mounting platform 6 is equipped with a connecting pipe 18. When the quick-change component is inserted into the mold core 2, the connecting pipe 18 is aligned and inserted into the slot 20 inside the mold core 2, and simultaneously abuts against the air pipe 16 on the base 3, forming an air passage. There is no need for manual pipe connection, threading, or quick-connect fitting, achieving simultaneous completion of mechanical positioning and air passage connection. Cooling is automatically connected / disconnected during mold changing, realizing integrated quick change and avoiding the cumbersome operation of traditional water / air passages requiring separate disassembly and assembly, improving mold changing efficiency and automation level. The airflow reaches the microchannel at the bottom of the cavity plate 8 through the connecting pipe 18 and the slot 20. Compared with overall water cooling, it can avoid internal stress or warping caused by over-cooling, and there is no risk of coolant leakage. It also prevents water vapor from entering the mold cavity and contaminating the product. When the air passage is blocked, only the corresponding connecting pipe 18 needs to be replaced, without disassembling the entire cooling system, reducing maintenance costs.

[0020] The mold frame 1 has an injection port 21 inside, one end of which extends to the surface of the mold frame 1. A guide sleeve 22 is installed inside the mold frame 1. The base 3 has a guide post 23 inside, which is used in conjunction with the guide sleeve 22. The guide post 23 penetrates the interior of the mold core 2 and abuts against the surface of the guide sleeve 22. The guide post 23 and the guide sleeve 22 form a main guide pair, which guides the moving mold and the fixed mold to close along a strictly vertical axis when the mold is closed, so as to avoid displacement due to assembly gaps or thermal deformation.

[0021] The base 3 is provided with a base plate 24 and a fixing plate 25 inside. The surface of the base plate 24 is equipped with a number of ejector pins 26 for ejecting the product. The ejector pins 26 penetrate the surface of the fixing plate 25 and the mold core 2 and extend into the cavity 12. The fixing plate 25 acts as an intermediate support plate, guiding and limiting the ejector pins 26 in the middle, reducing the deflection of the long-stroke ejector pins, and preventing the ejector pins from rubbing and getting stuck with the wall of the mold core 2 hole.

[0022] The base 3 has connecting grooves 27 on both ends of its surface. The connecting grooves 27 have a concave structure. During the injection molding process, the mold is subjected to huge clamping force and mold opening and closing impact. The concave connecting grooves 27 and the injection molding machine pressure plate / pull rod form an embedded locking, which is more resistant to lateral slippage than the traditional bolt flat contact, and plays a role in dispersing local stress and preventing the edge of the base 3 from deforming or cracking.

[0023] The surface of the push plate 11 is connected to a plurality of ejector rods 28 for assisting in the ejection of the product. The surface of the ejector rods 28 is connected to an ejector block 29 for auxiliary buffering. The ejector rods 28 are driven by the push plate 11 and can be used for supplementary ejection after the main ejector pin has completed the initial demolding. This avoids breakage, deformation or tearing caused by concentrated ejection force from a single ejector, and significantly improves the yield of high-complexity connectors. The ejector block 29 is used to absorb impact energy and prevent rigid metal ejector rods from directly impacting plastic products.

[0024] The cavity 12 is equipped with a rubber buffer block 30 for auxiliary buffering. When the mold is closed or after impact, it is easy to generate slight rebound or vibration, which may cause the position of the mounting platform 6 to shift. The rubber buffer block 30 provides continuous reaction force after compression, so that the quick-change component can stably fit against the positioning reference surface. Together with the limiting plate 13 and the positioning rod 14, a composite constraint of rigid positioning and elastic pressing is formed to prevent further displacement.

[0025] The support frame 5 has a base frame 31 inside to increase the support force. As a load-bearing component, the support frame 5 bears the pushing / pulling force of the cylinder 4 and the reaction force of the mold cavity during the injection molding process. The base frame 31 is a crossbeam or closed frame structure, which is embedded or welded inside the support frame 5 to form a box-shaped cross section. This structure can effectively improve its bending and torsional stiffness and prevent bending, twisting or fatigue cracking under high pressure.

[0026] The key design feature of this invention is that the structure adopts a quick-release mold core structure. By replacing the support template 7 and the cavity plate 8, the molding structure 9 on the cavity plate 8 can be replaced together. When replacing, the push cylinder 4, support frame 5, mounting platform 6, support template 7 and cavity plate 8 need to be pulled out into the mold core 2, and then the cavity plate 8 on the surface of the mounting platform 6 can be replaced to achieve the effect of quick replacement of the mold core structure. This structure improves upon the traditional mold change method, which requires disassembling the entire mold core, recalibrating the positioning, and adjusting the ejection system, taking 30–60 minutes per change. By retracting the cylinder 4, the push rod 10 and push plate 11 are released from the support template 7. Then, the push cylinder 4, support frame 5, mounting platform 6, support template 7, and cavity plate 8 are extracted as a whole to form an integrated structural component. The detachable cavity plate 8, or the support template 7 together, can be replaced to achieve a rapid mold core structure change. When the component is reinserted, the new specification product can be produced. This structure can reduce the traditional mold change time of 30–60 minutes per change to 3–8 minutes, meeting the requirements for real-time replacement of products needed in the new energy vehicle supply chain during the process. After the change, no machine readjustment is required, and the first mold meets the process requirements.

[0027] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A quick-change mold core injection molding system suitable for connectors in new energy vehicles, comprising a mold frame, a mold core, and a base, characterized in that: The mold core has a quick-change structure inside, which includes a push cylinder, a support frame, a mounting platform, a support template, and a cavity plate. The surface of the cavity plate has a forming structure. The cavity plate and the mounting platform are detachable. One end of the push cylinder is a push rod. A push plate is provided between the support frame and the support template. One end of the push rod is in contact with the surface of the push plate, and one end of the push plate abuts against the surface of the support template. Both the mold frame and the mold core have receiving cavities inside to accommodate the quick-change structure. The surface of the base is provided with a cooling device to assist in demolding.

2. The quick-change mold core injection mold system for new energy vehicle connectors according to claim 1, characterized in that: One end of the support frame extends into the interior of the mold core, the push cylinder is located at the other end of the support frame, the mounting platform is located inside the mold core, and both ends of the mounting platform are provided with limiting plates, which are connected to the mold core through positioning rods.

3. The quick-change mold core injection mold system for connectors of new energy vehicles according to claim 1, characterized in that: The cooling device includes air tanks and air pipes. The air tanks are arranged linearly on the surface of the base. One end of the air tank abuts against the air pipe. The bottom of the mounting platform is provided with a fixed seat. The surface of the fixed seat is provided with several connecting pipes that are paired with the air pipes. The bottom of the air tank is provided with a connecting hole for assisting the air tank in inflation. The inside of the mold core is provided with slots that are paired with the connecting pipes for installation.

4. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The mold frame has an injection port inside, one end of which extends to the surface of the mold frame. A guide sleeve is installed inside the mold frame, and a guide post is provided inside the base to be used in conjunction with the guide sleeve. The guide post penetrates the interior of the mold core and abuts against the surface of the guide sleeve.

5. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The base has a base plate and a fixing plate inside. The surface of the base plate is equipped with several ejector pins for ejecting the product. The ejector pins penetrate the surface of the fixing plate and the mold core and extend into the cavity.

6. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The base has connecting grooves on both ends of its surface, and the connecting grooves have an inward concave structure.

7. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The surface of the push plate is connected to a plurality of push rods for assisting the ejection of the product, and the surface of the push rods is connected to push blocks for auxiliary buffering.

8. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The cavity is equipped with a rubber buffer block for auxiliary cushioning.

9. A quick-change core injection mold system for connectors in new energy vehicles according to any one of claims 1-3, characterized in that: The support frame has an internal base for increasing support strength.

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