Injection molding device with rapid heat dissipation function

Abstract

The embodiment of the utility model provides a kind of injection molding device equipped with the quick heat dissipation function of article, including first mounting seat, second mounting seat, upper die, lower die and passive heat dissipation mechanism;The first mounting seat and the second mounting seat are connected with the upper die and the lower die respectively, and the passive heat dissipation mechanism is connected on the upper die;When the upper die vertically separates from the lower die, the upper die moving upward along the vertical direction will drive the passive heat dissipation mechanism to dissipate heat to the injection molded article, and it is related to injection mold field.Cooling molded article on lower die by passive heat dissipation mechanism using upper die opening movement.Reduce the cooling waiting time before manual operation, especially suitable for high frequency manual demolding small injection molding production.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, specifically to an injection molding device equipped with a rapid heat dissipation function for objects. Background Technology

[0002] Injection molding is a widely used process in the production of plastic products. It involves injecting molten plastic into a mold, which then cools and solidifies to form the desired shape. During injection molding, the cooling stage has a significant impact on production efficiency, product quality, and mold life. Traditional injection molds typically employ water cooling systems, using internal cooling channels to lower the temperature of the mold and the product. However, existing technologies still have the following problems under certain operating conditions: Excessive surface temperature affects manual operation: In some injection molding production scenarios, especially in small or medium-sized injection molding equipment, products need to be manually handled for transfer after demolding. Although water cooling systems can cool the products to a temperature that will not deform (usually below the material's glass transition temperature, such as 60-80°C), the surface temperature of the products often remains above the comfortable range for safe manual handling (usually below 40-50°C). This forces operators to wait longer to ensure safety, reduces production efficiency, and increases operational risks.

[0003] The conflict between cooling efficiency and production pace: In rapid injection molding, the mold opening and closing cycle is short (usually 2-5 seconds), requiring efficient cooling to match the high-frequency production pace. Traditional water cooling systems mainly target the internal cooling of the mold and the product, making it difficult to quickly reduce the surface temperature of the product in a short time, thus limiting the possibility of manual operation immediately after demolding.

[0004] Limitations of existing heat dissipation methods: Although the market has attempted to improve heat dissipation efficiency by optimizing cooling channel design or using high thermal conductivity materials, these methods mainly target overall mold cooling and are insufficient to specifically address the problem of excessively high surface temperatures of the product after demolding. Furthermore, increasing the complexity of cooling channels significantly increases mold processing costs, while the application scope and economic viability of high thermal conductivity materials are limited. Other auxiliary heat dissipation methods, such as external air cooling devices, typically require independent power sources, increasing equipment complexity and energy consumption, which is not entirely compatible with the compact design and high efficiency requirements of injection molds.

[0005] To address the aforementioned issues, there is an urgent need for a heat dissipation device that can effectively integrate with the mold opening and closing process in injection molding, specifically designed to solve the problem of excessively high surface temperatures of products after demolding. This device should, in addition to cooling the product to a point where deformation does not occur using a water-cooling system, further rapidly reduce the product's surface temperature to a range safe for manual handling (below 40-50°C), while maintaining a simple structure and high integration with the injection molding process, thereby improving production efficiency, ensuring operational safety, and reducing energy consumption. Utility Model Content

[0006] According to an embodiment of this utility model, an injection molding device equipped with a rapid heat dissipation function for objects is provided. This addresses the technical problems existing in the background art described above.

[0007] In a first aspect, an injection molding device equipped with a rapid heat dissipation function for objects is provided.

[0008] The injection molding device equipped with a rapid heat dissipation function for objects includes a first mounting base, a second mounting base, an upper mold, a lower mold, and a passive heat dissipation mechanism; the first mounting base and the second mounting base are respectively connected to the upper mold and the lower mold, and the passive heat dissipation mechanism is connected to the upper mold; When the upper mold detaches vertically from the lower mold, the upper mold, moving upward in the vertical direction, will drive the passive heat dissipation mechanism to dissipate heat from the injection-molded object.

[0009] Preferably, the first mounting base is provided with an active heat dissipation mechanism; the active heat dissipation mechanism includes a cooling pipe, a water inlet, a water outlet, a cavity, and a heat-conducting plate; The cavity is machined within the first mounting base, the cooling pipe is disposed within the cavity, the water inlet and the water outlet both penetrate the first mounting base and are connected to both ends of the cooling pipe, and the heat-conducting plate is connected below the first mounting base and fits against the cooling pipe.

[0010] Preferably, the cooling pipe is coiled on the heat-conducting plate.

[0011] Preferably, the passive heat dissipation mechanism includes a frame, a shell, a cover plate, a straight cylinder, fan blades, a bracket, a first gear, a gear ring, a back plate, a shaft, a second gear, a rack, and an outer frame; The frame is connected to the first mounting base and the outer frame. The rack is connected to the inner side of the outer frame and meshes with the second gear. The second gear is connected to the shaft and the back plate. The back plate is connected to the gear ring and the shaft is rotatably connected to the cover plate. The cover plate is connected to the outer shell. The gear ring and the back plate are disposed inside the outer shell. The gear ring is slidably connected to the inner wall of the outer shell. The inner wall of the straight cylinder is connected to the bracket and the bracket is rotatably connected to the fan blade. The fan blade is connected to the first gear and meshes with the gear ring. The straight cylinder is connected to the cover plate.

[0012] Preferably, the passive heat dissipation mechanism further includes a protective shell, which is connected to the straight cylinder and serves to protect the outer frame.

[0013] Preferably, a protective net is installed at the end of the straight cylinder away from the gear ring.

[0014] Preferably, it also includes a first side ear, a second side ear, and a limiting rod; The first side ear and the second side ear are respectively connected to the first mounting base and the second mounting base. The first side ear is connected to the limiting rod, and the limiting rod is slidably connected to the second side ear.

[0015] Preferably, it also includes a demolding mechanism, which includes a base plate, demolding pillars, connecting rods, and a top plate; The base plate is slidably connected to the lower part of the second mounting seat, the base plate is connected to the demolding column, the demolding column passes through the second mounting seat and the lower mold, the base plate is connected to the top plate through the connecting rod, and the bottom of the top plate is in contact with the top of the frame.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. This utility model provides an injection molding device equipped with a rapid heat dissipation function for the object. It utilizes a passive heat dissipation mechanism to cool the molded object on the lower mold through the opening motion of the upper mold. This reduces the cooling waiting time before manual operation and is particularly suitable for small-scale injection molding production with high-frequency manual demolding.

[0017] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0018] The above and other features, advantages, and aspects of the various embodiments of the present invention will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein: Figure 1 A three-dimensional connection structure diagram of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 2 An exploded view of an injection molding device equipped with a rapid heat dissipation function for an object, according to an embodiment of the present invention, is shown. Figure 3 A schematic diagram of the connection structure between the passive heat dissipation mechanism and the demolding mechanism of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 4 A schematic diagram of the connection structure of the active heat dissipation mechanism of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 5A schematic diagram of the connection structure of the passive heat dissipation mechanism of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 6 A schematic diagram of the connection structure of the fan blades, bracket, and protective shell of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 7 A plan view of the passive heat dissipation mechanism of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown. Figure 8 A schematic diagram of the connection structure of the demolding mechanism of an injection molding device equipped with a rapid heat dissipation function for objects, according to an embodiment of the present invention, is shown.

[0019] The attached figures are labeled as follows: 1-First mounting base, 2-Second mounting base, 3-Lower mold, 4-Upper mold, 5-Active heat dissipation mechanism, 501-Pipe, 502-Inlet, 503-Outlet, 504-Cavity, 505-Heat-conducting plate, 6-Passive heat dissipation mechanism, 601-Outer shell, 602-Cover plate, 603-Straight cylinder, 604-Frame, 605-Gear ring, 606-Back plate, 607-Shaft, 608-Second gear, 609-Outer frame, 610-Rack, 611-First gear, 612-Fan blade, 613-Bracket, 614-Protective shell, 7-Demolding mechanism, 701-Base plate, 702-Demolding column, 703-Connecting rod, 704-Top plate, 8-First side ear, 9-Limiting rod, 10-Second side ear. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0022] like Figures 1 to 8As shown, this injection molding device equipped with a rapid heat dissipation function for objects includes a first mounting base 1, a second mounting base 2, a lower mold 3, an upper mold 4, and a passive heat dissipation mechanism 6. The functions and connections of each component are explained below: The first mounting base 1 is fixed to the upper side of the upper mold 4, supporting the upper mold 4 and connecting to the upper drive mechanism (not shown) of the injection molding machine to drive the upper mold 4 to move vertically up and down. The second mounting base 2 is fixed to the lower side of the lower mold 3, supporting the lower mold 3 and fixing it to the worktable of the injection molding machine. The first mounting base 1 and the second mounting base 2 are connected to the upper mold 4 and the lower mold 3 by bolts or other conventional fixing methods to ensure the stability of the mold during the injection molding process.

[0023] The passive heat dissipation mechanism 6 is mounted on the upper mold 4 and moves synchronously with the vertical movement of the upper mold 4. The main function of the passive heat dissipation mechanism 6 is to use the airflow generated by the movement of the upper mold 4 to quickly dissipate heat from the molded part on the lower mold 3.

[0024] In actual use, the upper mold 4 and the lower mold 3 cooperate to form an injection molding cavity for injection molding of objects. The upper mold 4 can move vertically relative to the lower mold 3 under the drive of the first mounting base 1 to realize mold opening and closing operations. When the upper mold 4 and the lower mold 3 are closed, the injection material is injected into the molding cavity through the nozzle of the injection molding machine; when the upper mold 4 is vertically detached from the lower mold 3, the molded object remains on the lower mold 3, ready for subsequent heat dissipation and removal operations.

[0025] In this embodiment, the first mounting base 1 is equipped with an active heat dissipation mechanism 5 to accelerate heat dissipation from the upper mold 4 and the injection-molded part, thereby improving production efficiency. The active heat dissipation mechanism 5 includes a cooling pipe 501, a water inlet 502, a water outlet 503, a cavity 504, and a heat-conducting plate 505. The structure, connection relationship, and function of each component are described in detail below: Cavity 504 is a closed cavity machined inside the first mounting base 1 to accommodate cooling pipe 501. The shape and size of cavity 504 match the layout of cooling pipe 501, and it is typically rectangular or cylindrical in shape, formed inside the first mounting base 1 by CNC machining or casting. The inner wall of cavity 504 may be coated with an anti-corrosion coating to prevent corrosion caused by long-term use of coolant.

[0026] Cooling pipe 501 is disposed within cavity 504 and is made of a high thermal conductivity material (such as copper or stainless steel). It is arranged in a spiral pattern to increase the contact area with heat-conducting plate 505, thereby improving heat exchange efficiency. Both ends of cooling pipe 501 are connected to inlet 502 and outlet 503, respectively, forming a circulation channel for the coolant. During operation, coolant (such as water or a special coolant) enters cooling pipe 501 through inlet 502, absorbs heat, and is then discharged through outlet 503.

[0027] Both the inlet 502 and the outlet 503 penetrate the side wall or top of the first mounting base 1 and are fixedly connected to both ends of the cooling pipe 501 by threaded connection or welding. The inlet 502 is connected to the external water supply pipeline.

[0028] The heat-conducting plate 505 is fixed to the lower part of the first mounting base 1 by bolts or welding and is in direct contact with the upper surface of the upper mold 4 to transfer heat from the upper mold 4 to the cooling pipe 501. The heat-conducting plate 505 is made of a high thermal conductivity material (such as aluminum alloy or copper), and its upper surface is in close contact with the lower surface of the cooling pipe 501, with the contact area accounting for more than 80% of the total area of ​​the heat-conducting plate 505 to ensure efficient heat conduction. The thickness of the heat-conducting plate 505 is generally 5-10 mm to balance thermal conductivity and structural strength.

[0029] In actual use, the injection molding device operates as follows: Mold closing stage: The first mounting seat 1 drives the upper mold 4 downward to close with the lower mold 3. The injection material is injected into the molding cavity formed by the upper mold 4 and the lower mold 3 through the nozzle of the injection molding machine, and the injection molding of the object is completed.

[0030] Mold opening stage: After injection molding is completed, the first mounting base 1 drives the upper mold 4 to detach from the lower mold 3 vertically, leaving the molded part on the lower mold 3. At this time, the upper mold 4 has absorbed a lot of heat during the injection molding process and its temperature is relatively high.

[0031] Active cooling stage: The active cooling mechanism 5 is activated, and the coolant enters the cooling pipe 501 through the inlet 502. As it flows through the spiral cooling pipe 501, it absorbs the heat conducted by the heat-conducting plate 505, and then is discharged through the outlet 503. The heat-conducting plate 505 absorbs heat from the upper mold 4 and transfers it to the cooling pipe 501, thereby rapidly reducing the temperature of the upper mold 4.

[0032] During the part removal stage: After the upper mold 4 cools down, the temperature of the molded part drops to about 50 degrees Celsius. The molded part is further cooled naturally on the lower mold 3 or its cooling is accelerated by the passive heat dissipation mechanism 6, making it easier for operators to directly handle the hot molded part and improving production efficiency. Through the active heat dissipation mechanism 5, this embodiment can significantly reduce the temperature of the upper mold 4 and shorten the injection molding cycle time. Furthermore, the spiral arrangement of the cooling pipes 501 and the efficient heat conduction design of the heat-conducting plate 505 ensure uniform and stable heat dissipation, avoiding mold deformation or part quality problems caused by localized overheating.

[0033] In this embodiment, the spiral shape of the cooling pipe 501 can be replaced with a serpentine, helical, or other regular geometric shape according to actual needs to adapt to different heat dissipation requirements. The coolant can be water, oil, or other liquids with high heat capacity. The material of the heat-conducting plate 505 can also be replaced with other high thermal conductivity materials, such as graphite composite materials. All of the above substitution schemes are within the protection scope of this utility model.

[0034] In this embodiment, the passive heat dissipation mechanism 6 is mounted on the first mounting base 1 and moves synchronously with the vertical movement of the upper mold 4. It generates airflow through mechanical drive to rapidly dissipate heat from the injection-molded part on the lower mold 3, reducing its surface temperature to a comfortable range for safe handling (below 40-50°C). The passive heat dissipation mechanism 6 includes a frame 604, a housing 601, a cover plate 602, a straight cylinder 603, fan blades 612, a bracket 613, a first gear 611, a gear ring 605, a back plate 606, a shaft 607, a second gear 608, a rack 610, and an outer frame 609. The structure, connection relationships, and functions of each component are described in detail below: The frame 604 is fixed to the upper side of the first mounting base 1 by bolts or welding, and is used to support the overall structure of the passive heat dissipation mechanism 6. The frame 604 is connected to the outer frame 609 by bolts to form a stable frame structure.

[0035] The outer frame 609 is a rectangular or circular frame, fixed to the bracket 604, and is made of steel or aluminum alloy. It has a rack 610 on its inner side. The rack 610 is fixed to the inner wall of the outer frame 609 by bolts or welding, extending vertically with a length matching the opening stroke of the upper mold 4 (typically 100-300 mm). The rack 610 has straight or helical teeth that mesh with the second gear 608 to convert the linear motion of the upper mold 4 into rotary motion.

[0036] The second gear 608 meshes with the rack 610 and is fixed to one end of the shaft 607. The shaft 607 is a cylindrical structure made of stainless steel or high-strength alloy steel, which transversely penetrates the outer shell 601 and is fixedly connected to the back plate 606. The shaft 607 is rotatably connected to the cover plate 602 through bearings to reduce frictional resistance. When the upper mold 4 drives the frame 604 and the outer frame 609 to move vertically, the rack 610 drives the second gear 608 to rotate, thereby driving the shaft 607 and the back plate 606 to rotate synchronously.

[0037] The back plate 606 is a circular or polygonal plate structure, fixed to the other end of the shaft 607, and located inside the housing 601. The gear ring 605 is a ring gear, fixed to the outer edge of the back plate 606, and slidably connected to the inner wall of the housing 601 through a groove or guide rail to ensure stable rotation. The internal teeth of the gear ring 605 mesh with the first gear 611 to transmit rotational power.

[0038] The outer shell 601 is a hollow cylindrical shell, fixed to the frame 604, and internally houses the back plate 606 and the gear ring 605. The outer shell 601 is made of a high-temperature resistant material (such as aluminum alloy or engineering plastic) to withstand the high-temperature environment during injection molding. The cover plate 602 is fixed to the open end of the outer shell 601 by bolts or clips, used to close the outer shell 601 and support the straight cylinder 603. The cover plate 602 has a through hole for the shaft 607 to pass through and rotate.

[0039] The straight cylinder 603 is a hollow cylindrical structure, fixed to the cover plate 602, extending towards the lower mold 3. Its inner wall is secured to a bracket 613 via bolts. The bracket 613 has a cross or star-shaped structure with a central bearing supporting the rotation of the fan blades 612. The fan blades 612 are fixedly connected to the first gear 611 via a central shaft. There are 4-8 fan blades 612, made of lightweight, high-temperature resistant materials (such as aluminum alloy or reinforced plastic). The outlet of the straight cylinder 603 faces the molded object on the lower mold 3, guiding the airflow generated by the fan blades 612. The first gear 611 meshes with the internal teeth of the gear ring 605, receiving the rotational power from the gear ring 605, driving the fan blades 612 to rotate at high speed, generating an airflow that blows downwards towards the molded object.

[0040] In actual use, the passive heat dissipation mechanism 6 operates as follows: Mold closing stage: The first mounting base 1 drives the upper mold 4 downward to close with the lower mold 3, and the injection material is injected into the molding cavity to complete the molding of the object. At this time, the passive heat dissipation mechanism 6 is stationary with the upper mold 4, and the fan blades 612 do not rotate.

[0041] Mold opening stage: After injection molding is completed, the first mounting base 1 drives the upper mold 4 to detach from the lower mold 3 vertically, leaving the molded part on the lower mold 3. The passive heat dissipation mechanism 6 moves upward synchronously with the first mounting base 1 and the upper mold 4, and the rack 610 on the outer frame 609 meshes with the second gear 608, driving the second gear 608 to rotate.

[0042] Heat dissipation stage: The second gear 608 drives the back plate 606 and the gear ring 605 to rotate via the shaft 607. The internal teeth of the gear ring 605 drive the first gear 611 to rotate, thereby causing the fan blade 612 to rotate at high speed. The fan blade 612 generates a downward airflow inside the straight cylinder 603, which blows onto the molded object on the lower mold 3, accelerating heat dissipation from its surface and rapidly reducing the surface temperature to below 40-50℃ (the tooth ratio between the first gear 611, the second gear 608, and the gear ring 605 is set according to actual needs).

[0043] Object Removal Stage: After the molded object cools to a safe temperature, the operator can directly remove it manually to complete the transfer after demolding. Through the passive heat dissipation mechanism 6, this embodiment utilizes the opening motion of the upper mold 4 to drive the fan blades 612 to rotate, generating directional airflow and significantly reducing the surface temperature of the molded object on the lower mold 3. Experiments show that compared to injection molding devices without a passive heat dissipation mechanism, this embodiment can shorten the time for the object surface to cool to 40-50°C by approximately 50%, thereby reducing operator waiting time, improving production efficiency, and reducing operational risks (such as burns). Furthermore, the passive heat dissipation mechanism 6 achieves heat dissipation through mechanical transmission, requiring no additional power supply, thus reducing energy consumption and maintenance costs.

[0044] The passive cooling mechanism 6 also includes a protective shell 614 and a protective mesh.

[0045] The protective shell 614 is a hollow shell made of high-temperature resistant and impact-resistant engineering plastics (such as polycarbonate) or metal materials (such as aluminum alloy), and is connected to the outer wall of the straight cylinder 603 by bolts or clips. The protective shell 614 covers the outside of the outer frame 609, serving to prevent dust and impact, and to protect the meshing mechanism between the rack 610 and the second gear 608. The shape of the protective shell 614 matches the outer frame 609, and is usually rectangular or cylindrical.

[0046] The protective netting is installed at the end of the straight cylinder 603 furthest from the toothed ring 605 (i.e., the outlet end of the straight cylinder 603, facing the lower mold 3), and is fixed to the end face of the straight cylinder 603 by bolts or clips. The protective netting is made of stainless steel or high-strength plastic, with a mesh size of 3-8 mm. This allows for smooth airflow generated by the fan blades 612 while preventing operators' fingers or other foreign objects from accidentally entering the straight cylinder 603, ensuring operational safety. The surface of the protective netting can be coated with an anti-corrosion coating to adapt to the high humidity or high temperature environment of the injection molding workshop.

[0047] In this embodiment, a first side lug 8, a second side lug 10, and a limiting rod 9 are included to guide the relative movement of the upper mold 4 and the lower mold 3 during mold closing and opening processes, ensuring the accuracy and stability of the mold movement. The structure, connection relationships, and functions of the newly added components are described in detail below: The first side ear 8 is a plate-shaped or block-shaped structure made of high-strength materials (such as stainless steel or cast steel), and is fixed to the side of the first mounting base 1 by bolts or welding. The first side ear 8 is provided with a through hole (the hole diameter is usually 10-20 mm) for fixed connection with one end of the limiting rod 9.

[0048] The second side ear 10 is also a plate-shaped or block-shaped structure, made of the same material as the first side ear 8, and is fixed to the side of the second mounting base 2 by bolts or welding. The second side ear 10 has a sliding hole (the hole diameter is slightly larger than the outer diameter of the limiting rod 9, typically 12-22 mm), and a wear-resistant bushing (such as a PTFE or copper alloy bushing) can be embedded in its inner wall to reduce friction when sliding with the limiting rod 9. The number of second side ears 10 corresponds to the number of first side ears 8.

[0049] The limiting rod 9 is a cylindrical rod-shaped structure. One end of the limiting rod 9 is fixed in the through hole of the first side ear 8 by a threaded connection or a pin, and the other end passes through the sliding hole of the second side ear 10 to form a sliding connection with the second side ear 10.

[0050] In actual use, the first mounting base 1 drives the upper mold 4 downward to close with the lower mold 3, and the injection material is injected into the molding cavity through the nozzle of the injection molding machine to complete the molding of the object. The first side ear 8 moves downward with the first mounting base 1, which drives the limiting rod 9 to slide downward in the sliding hole of the second side ear 10. The limiting rod 9 ensures that the upper mold 4 is accurately aligned with the lower mold 3 in the vertical direction, avoiding offset or tilting.

[0051] In this embodiment, a demolding mechanism 7 is also included, which is used to eject the molded part from the lower mold 3 after injection molding, facilitating manual handling or subsequent transfer. The demolding mechanism 7 includes a base plate 701, a demolding pillar 702, a connecting rod 703, and a top plate 704. The structure, connection relationship, and function of each component are described in detail below: The base plate 701 is a rectangular or circular plate structure made of high-strength materials (such as cast steel or aluminum alloy) and is located below the second mounting base 2. The base plate 701 is slidably connected to the bottom of the second mounting base 2 via slide rails or guide pillars. The upper surface of the base plate 701 is fixedly connected to the demolding pillars 702 by bolts or welding, and the lower surface is connected to the top plate 704 via connecting rods 703.

[0052] The ejector pins 702 are cylindrical. The lower end of the ejector pins 702 is fixed to the base plate 701, passing through pre-set through holes in the second mounting base 2 and the lower mold 3 (the hole diameter is slightly larger than the outer diameter of the ejector pin, typically 15-30 mm). The upper end is flush with or slightly lower than the bottom surface of the molding cavity of the lower mold 3. There are 2-6 ejector pins 702, distributed according to the size and shape of the molded object (e.g., symmetrical or arranged along the object's outline), with a diameter of 10-25 mm and a length of 100-300 mm, ensuring complete ejection of the molded object.

[0053] The connecting rod 703 is a slender rod-shaped structure made of steel or aluminum alloy, and there are usually 2-4 of them to balance the thrust of the top plate 704. One end of the connecting rod 703 is fixed to the bottom plate 701 by bolts.

[0054] The top plate 704 is a rectangular or circular plate structure, made of the same material as the bottom plate 701, located below the bottom plate 701 and connected by a connecting rod 703. The bottom of the top plate 704 is in contact with the top of the frame 604 of the passive heat dissipation mechanism 6, and the contact method is non-fixed contact (such as planar contact or through a buffer pad) to avoid interfering with the movement of the frame 604 with the first mounting base 1.

[0055] In actual use, the injection molding device operates as follows: Mold Closing Stage: Guided by the first side lug 8 and the limiting rod 9, the first mounting base 1 drives the upper mold 4 downward to close with the lower mold 3, and the injection material is injected into the molding cavity to complete the molding of the object. The demolding mechanism 7 is in its initial state, with the upper end of the demolding pillar 702 flush with the bottom surface of the molding cavity of the lower mold 3, and the bottom plate 701 and the top plate 704 are stationary. After injection molding, the first mounting base 1 drives the upper mold 4 upward to detach from the lower mold 3, and the molded object remains on the lower mold 3. The passive heat dissipation mechanism 6 moves with the first mounting base 1, generating airflow to cool the surface of the object to below 40-50°C. The limiting rod 9 ensures that the upper mold 4 moves smoothly. Since the frame 604 is attached to the bottom of the top plate 704, the upward movement of the frame 604 will drive the top plate 704 to move upward. The top plate 704 drives the bottom plate 701 to slide upward along the slide rail of the second mounting base 2 through the connecting rod 703. The base plate 701 pushes the ejector pin 702 through the lower mold 3, ejecting the molded part from the molding cavity. The bottom of the top plate 704 separates from the top of the frame 604, and the frame 604 remains in the upper position with the upper mold 4, without interfering with the demolding process. Through the setting of the demolding mechanism 7, this embodiment achieves rapid and stable ejection of the molded part, significantly improving demolding efficiency and operational safety. No additional electric equipment or operations are required for demolding. This embodiment is particularly suitable for scenarios requiring manual handling in small or medium-sized injection molding equipment, reducing operator waiting time, lowering the risk of burns, and improving production efficiency.

[0056] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An injection molding device equipped with a rapid heat dissipation function for objects, characterized in that, It includes a first mounting base (1), a second mounting base (2), an upper mold (4), a lower mold (3), and a passive heat dissipation mechanism (6); the first mounting base (1) and the second mounting base (2) are respectively connected to the upper mold (4) and the lower mold (3), and the passive heat dissipation mechanism (6) is connected to the upper mold (4); When the upper mold (4) moves vertically upward away from the lower mold (3), the upper mold (4) moving upward in the vertical direction will drive the passive heat dissipation mechanism (6) to dissipate heat from the injection-molded object.

2. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 1, characterized in that, The first mounting base (1) is provided with an active heat dissipation mechanism (5); the active heat dissipation mechanism (5) includes a cooling pipe (501), a water inlet (502), a water outlet (503), a cavity (504), and a heat conduction plate (505); The cavity (504) is machined inside the first mounting base (1), the cooling pipe (501) is disposed inside the cavity (504), the water inlet (502) and the water outlet (503) both pass through the first mounting base (1) and are connected to both ends of the cooling pipe (501), and the heat-conducting plate (505) is connected below the first mounting base (1) and fits against the cooling pipe (501).

3. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 2, characterized in that, The cooling pipe (501) is coiled on the heat-conducting plate (505).

4. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 1, characterized in that, The passive heat dissipation mechanism (6) includes a frame (604), a shell (601), a cover plate (602), a straight cylinder (603), a fan blade (612), a bracket (613), a first gear (611), a gear ring (605), a back plate (606), a shaft (607), a second gear (608), a rack (610), and an outer frame (609). The frame (604) is connected to the first mounting base (1), the frame (604) is connected to the outer frame (609), the rack (610) is connected to the inner side of the outer frame (609), the rack (610) is meshed with the second gear (608), the second gear (608) is connected to the shaft (607), the shaft (607) is connected to the back plate (606), the back plate (606) is connected to the gear ring (605), the shaft (607) is rotatably connected to the cover plate (602), and the cover plate (602) is rotatably connected to the cover plate (602). 2) Connected to the outer shell (601), the gear ring (605) and the back plate (606) are disposed inside the outer shell (601), the gear ring (605) is slidably connected to the inner wall of the outer shell (601), the inner wall of the straight cylinder (603) is connected to the bracket (613), the bracket (613) is rotatably connected to the fan blade (612), the fan blade (612) is connected to the first gear (611), the first gear (611) meshes with the gear ring (605), and the straight cylinder (603) is connected to the cover plate (602).

5. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 4, characterized in that, The passive heat dissipation mechanism (6) also includes a protective shell (614), which is connected to the straight cylinder (603) and is used to protect the outer frame (609).

6. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 4, characterized in that, A protective net is installed at the end of the straight cylinder (603) away from the toothed ring (605).

7. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 1, characterized in that, It also includes a first side ear (8), a second side ear (10), and a limiting rod (9); The first side ear (8) and the second side ear (10) are respectively connected to the first mounting base (1) and the second mounting base (2). The first side ear (8) is connected to the limiting rod (9), and the limiting rod (9) is slidably connected to the second side ear (10).

8. The injection molding device equipped with a rapid heat dissipation function for objects according to claim 4, characterized in that, It also includes a demolding mechanism (7), which includes a base plate (701), a demolding column (702), a connecting rod (703) and a top plate (704). The base plate (701) is slidably connected to the lower part of the second mounting base (2), the base plate (701) is connected to the demolding column (702), the demolding column (702) passes through the second mounting base (2) and the lower mold (3), the base plate (701) is connected to the top plate (704) through the connecting rod (703), and the bottom of the top plate (704) is in contact with the top of the frame (604).

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