Automatic injection molding device for safety helmet

Abstract

The application relates to the technical field of injection molding machines, in particular to an automatic injection molding device for safety helmets, which comprises an injection molding machine, a feeding assembly, a shearing assembly and a transfer mechanism. The injection molding machine is arranged at an injection molding station and is used for injection molding to form safety helmets; the feeding assembly comprises a base material bin, a color master bin, a conveying pump, a main conveying pipe, an auxiliary conveying pipe and a flow control valve; the two ends of the main conveying pipe are respectively connected with the base material bin and the input end of the conveying pump, the output end of the conveying pump is connected with the hopper of the injection molding machine, the two ends of the auxiliary conveying pipe are respectively connected with the color master bin and the main conveying pipe, and the flow control valve is arranged on the auxiliary conveying pipe; the shearing assembly is arranged at a water gap processing station and is used for shearing the water gap on the safety helmet; and the transfer mechanism is arranged across the injection molding station and the water gap processing station and is used for transferring the safety helmet between the injection molding station and the water gap processing station. The application realizes high-efficiency, high-quality and high-safety production of the injection molding of safety helmets.

Description

Technical Field

[0001] This application relates to the field of injection molding machine technology, and in particular to an automated injection molding device for safety helmets. Background Technology

[0002] As a crucial piece of head protection equipment, safety helmets are primarily manufactured using injection molding. A complete safety helmet injection molding production process typically involves multiple interconnected steps, including raw material proportioning and color mixing, material conveying to the injection molding machine hopper, injection molding, removal of the molded part from the cavity, removal of the injection gate, and collection and sorting of finished safety helmets. The quality and efficiency of each step directly determine the final product's pass rate, appearance consistency, and production safety.

[0003] In the current helmet injection molding industry, the aforementioned process still relies heavily on manual operation. During the raw material preparation stage, most companies rely on operators' personal experience to roughly weigh and mix plastic granules and color masterbatch in appropriate proportions before feeding the mixture into the injection molding machine hopper. After injection molding, the safety door of the injection molding machine is usually manually opened to remove the semi-finished helmet from the injection cavity. Then, a cutter or shearing assembly is used to remove any remaining sprue marks from the product. Finally, the processed helmets are stacked, counted, and boxed for collection.

[0004] However, the aforementioned production method has some shortcomings. First, the accuracy of manual batching is highly susceptible to factors such as the operator's experience and fatigue level, leading to significant fluctuations in the mixing ratio of plastic granules and masterbatch between different batches. This can easily result in color differences and quality defects in safety helmets from different batches. Second, manual handling of parts and sprue removal exposes operators directly to high-temperature molds, hot products just ejected from the mold, and sharp trimming tools, posing a significant risk of burns, mechanical injuries, or cuts. Furthermore, the repeated opening and closing of safety doors disrupts the stable injection molding cycle, reducing production efficiency. In addition, the inconsistent quality of manually processed sprue sections, often leaving burrs or dents, affects both product appearance and wearing comfort, and increases the difficulty of on-site management due to the chaotic manual stacking of materials. Overall, the existing manual production model fails to meet the core requirements of modern safety helmet manufacturing—efficiency, quality, and safety—in terms of labor intensity, product quality stability, and safety levels.

[0005] Therefore, in order to overcome the inefficiencies, large quality fluctuations, and frequent safety accidents caused by the high reliance on manual labor in the current safety helmet injection molding production process, there is an urgent need to provide an automated safety helmet injection molding production device. Summary of the Invention

[0006] In order to achieve high-efficiency, high-quality and high-safety production of safety helmets through injection molding, this application provides an automated injection molding device for safety helmets.

[0007] The automated injection molding device for safety helmets provided in this application adopts the following technical solution: An automated injection molding machine for safety helmets includes: An injection molding machine, located at the injection molding station, is used to injection mold safety helmets; The feeding assembly includes a substrate bin, a masterbatch bin, a delivery pump, a main delivery pipe, a secondary delivery pipe, and a flow control valve. One end of the main delivery pipe is connected to the substrate bin, and the other end is connected to the input end of the delivery pump. The output end of the delivery pump is connected to the hopper of the injection molding machine. One end of the secondary delivery pipe is connected to the masterbatch bin, and the other end is connected to the main delivery pipe. The angle between the end of the main delivery pipe connected to the substrate bin and the secondary delivery pipe is an acute angle or a right angle. The flow control valve is located on the secondary delivery pipe. The shearing assembly, located at the sprue treatment station, is used to cut the sprue on the safety helmet; The transfer mechanism, which spans the injection molding station and the sprue treatment station, is used to transfer safety helmets between the injection molding station and the sprue treatment station.

[0008] By adopting the above technical solution, the substrate and masterbatch hoppers independently store the substrate and masterbatch, respectively. During injection molding, the delivery pump starts, generating directional airflow in the main delivery pipe to draw substrate particles from the substrate hopper into the main delivery pipe for forward transport. Simultaneously, airflow is generated in the auxiliary delivery pipe to draw masterbatch from the masterbatch hopper into the main delivery pipe, thus achieving automatic collection of substrate and masterbatch, replacing manual weighing and mixing. The flow control valve on the auxiliary delivery pipe can precisely adjust the intake of masterbatch, ensuring that the masterbatch and substrate are mixed in a predetermined ratio. This eliminates mixing ratio fluctuations caused by operator experience, fatigue, etc., and avoids quality defects such as color differences between different batches of safety helmets. The injection molding machine automatically completes the injection molding of the safety helmet at the injection station. The transfer mechanism can automatically remove the safety helmet from the mold at the injection station after injection molding and transfer it to the sprue treatment station, eliminating the need for manual handling and preventing safety hazards such as burns and pinches to operators. It also eliminates the need to repeatedly open and close the safety door of the injection molding machine, ensuring continuous and stable injection molding cycles and improving production efficiency. The shearing assembly automatically cuts the sprue nozzles on the safety helmets at the sprue treatment station, replacing manual trimming, avoiding the risks of manual operation, and improving the stability of product quality. The entire device integrates automatic batching, automatic injection molding, automatic transfer, and automatic sprue removal functions, overcoming the difficulties of low efficiency, large quality fluctuations, and frequent safety accidents in existing manual production methods, and achieving high-efficiency, high-quality, and high-safety production of safety helmets through injection molding.

[0009] Optionally, the main conveying pipe includes a constricted section, a throat section, and a flared section connected sequentially along the conveying direction; the end of the auxiliary conveying pipe opposite to the color masterbatch chamber is connected to the throat section.

[0010] By adopting the above technical solution, the flow rate increases when the substrate flows through the constriction section, forming a local negative pressure in the throat section. The Venturi effect is used to automatically draw in the color masterbatch and bring it into the flaring section along with the high-speed substrate flow for preliminary mixing. This ensures that the color masterbatch is evenly dispersed in the substrate before entering the delivery pump, avoiding uneven color caused by local enrichment and agglomeration of the color masterbatch. This further improves the melt mixing effect and the uniformity of the product appearance, and efficient premixing can be achieved without additional power.

[0011] Optionally, the feeding assembly further includes a spiral plate disposed inside the main conveying pipe and located between the end of the main conveying pipe that connects to the conveying pump and the connection point between the main conveying pipe and the auxiliary conveying pipe, for forming a spiral flow channel inside the main conveying pipe.

[0012] By adopting the above technical solution, a spiral flow channel is formed in the main conveying pipe using a spiral plate, causing the mixture of substrate and color masterbatch to rotate and advance along the spiral path during the conveying process, generating a continuous radial shear and convection mixing effect. The mixture achieves sufficient turbulent mixing during the conveying stage, further reducing defects such as color streaks or uneven shades caused by uneven mixing, and improving the quality of the finished product.

[0013] Optionally, the transfer mechanism includes a multi-axis moving arm and a suction assembly; the multi-axis moving arm has a fixed end and a first movable end that can move relative to the fixed end along the x-axis, y-axis and z-axis directions respectively; the suction assembly is connected to the first movable end and is used to suction the safety helmet.

[0014] By adopting the above technical solution, the multi-axis moving arm can drive the suction component to move and position precisely in three-dimensional space, reliably picking up the safety cap from the injection molding machine mold and transferring it to the sprue treatment station. This not only achieves efficient automatic part picking and transfer, but also avoids product collision and deformation that may be caused by manual part picking. At the same time, it provides a precise positional basis for the subsequent automatic shearing of the sprue by the shearing component, further improving the cycle efficiency and transfer reliability of automated operations.

[0015] Optionally, the multi-axis moving arm also has a second movable end that can move relative to the fixed end along the x-axis and y-axis directions respectively, and the shearing assembly is disposed on the second movable end; the transfer mechanism further includes a telescopic drive fixed to the first movable end, the suction assembly is connected to the output end of the telescopic drive, and the telescopic drive is used to drive the suction assembly to move closer to or away from the shearing assembly along the mold opening and closing direction of the injection molding machine.

[0016] By adopting the above technical solution, the second movable end of the multi-axis moving arm is fixedly connected to a shearing component and can move along the x-axis and y-axis directions, while the first movable end is fixedly connected to a telescopic drive component and can move along the x-axis, y-axis, and z-axis directions. When the two work together, during the process of the multi-axis moving arm driving the suction component to remove the safety helmet from the injection mold and transfer it to the material handling station, the relative movement of the first and second movable ends in the z-axis direction allows the sprue at the top of the safety helmet to be quickly aligned with the shearing component in the mold opening and closing direction. Subsequently, the telescopic drive component drives the suction component to move the safety helmet closer to the shearing component along the mold opening and closing direction to complete the sprue shearing. This process overlaps the safety helmet's transfer path and the sprue handling action in space and time, realizing the merging of the transport and shearing cycle, eliminating the need for an additional independent process of stopping at the sprue handling station for fixed-point trimming, shortening the production cycle of a single product, and improving overall production efficiency. At the same time, the operator does not need to contact the product during the entire sprue removal process, eliminating the risk of cuts caused by manual trimming and further enhancing production safety.

[0017] Optionally, the suction assembly includes a mounting base, a slide rod, a suction cup, an elastic element, and a negative pressure generator; the mounting base is fixedly connected to the output end of the telescopic drive component; one end of the slide rod is slidably connected to the mounting base, and the other end of the slide rod is connected to the suction cup; the sliding direction of the slide rod is parallel to the mold opening and closing direction of the injection molding machine, and the elastic element is used to drive the slide rod to tend to move away from the mounting base; the negative pressure generator is used to generate negative pressure on the suction surface of the suction cup.

[0018] By adopting the above technical solution, a sliding pair is formed between the suction cup and the mounting base. When the suction cup adheres to the outer surface of the safety helmet under the action of the negative pressure generator, the elastic element continuously drives the sliding rod to tend to move away from the mounting base, so that the suction force applied by the suction cup to the safety helmet has flexible follow-up characteristics within the stroke of the sliding rod. During the transfer of the safety helmet, if the relative displacement tendency between the safety helmet and the suction assembly occurs due to mechanical vibration or moving inertia, the sliding fit of the sliding rod and the elastic deformation of the elastic element can absorb and buffer this displacement deviation, avoiding indentations or scratches on the surface of the safety helmet due to rigid tension, and reducing damage to the finished safety helmet. When the telescopic drive pushes the suction cup to bring the safety cap closer to the shearing assembly for sprue trimming, the safety cap and sprue enter the shearing position. At this time, the reaction force of the shearing assembly acting on the sprue is transmitted between the safety cap and the suction cup. The floating support formed by the slide rod and the elastic element can automatically compensate for the slight error in the feed amount, preventing the safety cap from being excessively squeezed and deformed or broken. At the same time, it maintains a stable fit between the suction cup and the safety cap, making the sprue trimming position more precise and controllable. This ensures that the sprue cross-section is flat and smooth, and protects the integrity of the product structure. It takes into account both the positioning accuracy and non-destructive clamping requirements in the adsorption, handling and trimming processes.

[0019] Optionally, the slide bar and the suction cup are movably connected via a universal ball joint.

[0020] By adopting the above technical solution, the suction cup can rotate freely relative to the slide bar to adapt to the outer surface of safety helmets with different curvatures, thereby expanding the effective adsorption area, enhancing the adsorption firmness, preventing adsorption from falling off during high-speed transportation or shearing stress, and reducing the risk of deformation of the product surface caused by localized suction concentration due to improper adsorption angle. It also enhances the adaptability of the suction component to the differences in curvature of various types and helmets.

[0021] Optionally, the suction component has at least three parts.

[0022] By adopting the above technical solution, the three suction components form multi-point distributed adsorption on the surface of the safety helmet, which makes the force on the part more balanced and the posture more stable during the handling process. It effectively suppresses the swaying and rotation that may be caused by single-point adsorption, avoids collision damage to the safety helmet during high-speed movement, ensures the positional accuracy of transfer and sprue shearing operations, and further improves the stability of equipment operation and yield.

[0023] Optionally, it also includes a finished product conveyor line and a receiving hopper; one end of the finished product conveyor line extends to the unloading station, and the other end of the finished product conveyor line extends above the receiving hopper; the transfer mechanism is also used for transferring the safety helmet between the sprue treatment station and the unloading station.

[0024] By adopting the above technical solution, safety helmets that have undergone dewatering can be directly placed on the finished product conveyor line by the transfer mechanism and automatically transported to the collection hopper for centralized collection, replacing manual stacking, counting and packing operations. This achieves unmanned continuous operation of the entire process from injection molding to finished product collection, reducing manual labor intensity and management costs, and improving production efficiency.

[0025] Optionally, a sprue collection frame for collecting sprues is provided below the shearing component.

[0026] By adopting the above technical solution, the sheared and separated sprue material automatically falls into the sprue collection box under the action of gravity and is collected in a concentrated manner, which effectively avoids sprue debris from scattering on the workbench or the ground. This not only keeps the work area clean and tidy and reduces the risk of personnel being injured by sprue material explosions, but also facilitates the timely recycling and reuse of sprue waste, thus improving production economy.

[0027] In summary, this application includes the following beneficial technical effects: 1. By independently setting up the substrate and color masterbatch compartments in the feeding assembly, and in conjunction with the main conveying pipe, auxiliary conveying pipe, and flow control valve, automatic metering, proportioning, and collection of substrate and color masterbatch are achieved, replacing manual weighing and mixing, eliminating proportion fluctuations, and ensuring the consistency of color between different batches of safety helmets; at the same time, by utilizing the ejector interface formed by the constriction section, throat section, and flaring section in the main conveying pipe, as well as the spiral flow channel formed by the spiral plate, the color masterbatch and substrate can achieve efficient premixing and full turbulent mixing during the conveying stage, effectively avoiding local enrichment or agglomeration of color masterbatch, and improving the uniformity of product appearance and finished product quality; 2. A multi-axis moving arm of the transfer mechanism, in conjunction with a suction component, automatically retrieves parts from the injection molding station. A shearing component is fixed to the second movable end of the multi-axis moving arm. A telescopic drive component drives the suction component to move along the mold opening and closing direction of the injection molding machine, allowing the safety helmet to complete sprue shearing during the transfer process. This design overlaps the transfer path and sprue processing action in space and time, eliminating the need for a separate sprue processing stop process, shortening the single-piece production cycle, and significantly improving overall production efficiency. At the same time, at least three suction components adaptively conform to the curved surface of the safety helmet through universal ball joints, forming a multi-point distributed stable adsorption, ensuring positional accuracy and product integrity during high-speed transfer and shearing. 3. The entire device integrates automatic feeding, automatic injection molding, automatic transfer, and automatic desprue functions. Through the connection of the transfer mechanism, finished product conveyor line, and receiving hopper, it realizes unmanned continuous production throughout the entire process. It fundamentally eliminates the safety hazards such as burns, pinching, and cuts that may be caused by manual handling, trimming of sprues, and stacking. Moreover, it eliminates the need to repeatedly open and close the injection molding machine safety door, ensuring the continuous and stable injection molding cycle and achieving high-safety production of safety helmet injection molding. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the automated injection molding device for safety helmets according to Embodiment 1 of this application.

[0029] Figure 2 This application mainly demonstrates the cooperation relationship between the injection molding machine and the material feeding component of the automated injection molding device for safety helmets in the embodiments of this application.

[0030] Figure 3 This application primarily showcases the feeding components of the automated injection molding device for safety helmets in its embodiments.

[0031] Figure 4 yes Figure 3 A magnified view of part A in the middle.

[0032] Figure 5 This application primarily showcases the transfer mechanism of the automated injection molding device for safety helmets in its embodiments.

[0033] Figure 6 This application primarily showcases the suction component of the automated injection molding device for safety helmets in its embodiments.

[0034] Explanation of reference numerals in the attached drawings: 1. Injection molding machine; 2. Feeding assembly; 21. Substrate bin; 22. Masterbatch bin; 23. Conveyor pump; 24. Main conveyor pipe; 241. Narrowing section; 242. Throat section; 243. Flaring section; 25. Secondary conveyor pipe; 26. Flow control valve; 27. Spiral plate; 3. Shearing assembly; 31. Shearing clamps; 4. Transfer mechanism; 41. Multi-axis moving arm; 410. Fixed end; 420. First movable end; 430. 411. Second movable end; 412. Gantry; 413. First slide rail; 414. First slide block; 415. Second slide block; 416. Third slide rail; 417. Third slide block; 42. Suction assembly; 421. Mounting base; 422. Slide rod; 423. Suction cup; 424. Elastic element; 425. Negative pressure generating element; 43. Telescopic drive element; 5. Finished product conveyor line; 6. Receiving hopper; 7. Sprue collection frame. Detailed Implementation

[0035] The following combination Figures 1-6 This application will be described in further detail.

[0036] This application discloses an automated injection molding device for safety helmets.

[0037] Reference Figure 1 and Figure 2 In this embodiment, the automated injection molding device for safety helmets includes an injection molding machine 1, a feeding assembly 2, a shearing assembly 3, a transfer mechanism 4, a finished product conveying line 5, and a receiving hopper 6.

[0038] The injection molding machine 1 is located at the injection molding station and is used to injection mold the safety helmet. The feeding assembly 2 works in conjunction with the injection molding machine 1 to achieve automatic collection and precise proportioning of the base material and color masterbatch. The shearing assembly 3 is located at the sprue treatment station and can automatically cut the sprue on the safety helmet; the shearing assembly 3 includes shearing pliers 31. The transfer mechanism 4 spans the injection molding station and the sprue treatment station, and is used to transfer the safety helmet between the injection molding station, the sprue treatment station, and the unloading station. This replaces manual picking and transferring operations, avoiding various problems caused by manual operation and improving production efficiency and product quality.

[0039] Reference Figure 2 and Figure 3Specifically, the feeding assembly 2 includes a substrate bin 21, a masterbatch bin 22, a delivery pump 23, a main delivery pipe 24, a secondary delivery pipe 25, and a flow control valve 26. The substrate bin 21 is a container for storing substrates, typically made of stainless steel or similar materials, providing good sealing and corrosion resistance to ensure the substrates are not affected by the external environment. The masterbatch bin 22 has a similar structure and material to the substrate bin 21 and is specifically designed for storing masterbatch. The delivery pump 23 can be a centrifugal pump, providing sufficient power to generate directional airflow within the main delivery pipe 24; the output of the delivery pump 23 is connected to the hopper of the injection molding machine 1 via a pipe.

[0040] One end of the main delivery pipe 24 is connected to the substrate storage chamber 21, and the other end is connected to the input end of the delivery pump 23. One end of the auxiliary delivery pipe 25 is connected to the masterbatch storage chamber 22, and the other end is connected to the main delivery pipe 24. The angle between the auxiliary delivery pipe 25 and the end of the main delivery pipe 24 connected to the substrate storage chamber 21 is an acute angle or a right angle. The flow control valve 26 can be an electric flow control valve, installed on the auxiliary delivery pipe 25. By controlling the opening of the valve, the intake amount of masterbatch can be precisely adjusted.

[0041] The finished product conveyor line 5 and the receiving hopper 6 are located on one side of the injection molding machine 1; the finished product conveyor line 5 can be a belt conveyor, with one end extending to the unloading station and the other end extending above the receiving hopper 6. The transfer mechanism 4 is also used for transferring the safety helmet between the sprue treatment station and the unloading station.

[0042] During injection molding, the delivery pump 23 starts, generating a directional airflow in the main delivery pipe 24. This airflow draws the substrate particles from the substrate chamber 21 into the main delivery pipe 24 and transports them forward. Simultaneously, airflow is generated in the auxiliary delivery pipe 25, drawing the color masterbatch from the color masterbatch chamber 22 into the main delivery pipe 24, thus achieving automatic mixing of the substrate and color masterbatch. The flow control valve 26 ensures that the color masterbatch and substrate are mixed in a predetermined ratio, avoiding quality defects such as color differences between different batches of safety helmets.

[0043] After the safety helmets have been dewatered, they can be directly placed on the finished product conveyor line 5 by the transfer mechanism 4 and automatically transported to the collection hopper 6 for centralized collection. This replaces manual stacking, counting, and packing operations, realizing unmanned continuous operation of the entire process from injection molding to finished product collection, further reducing manual labor intensity and management costs, and improving production efficiency.

[0044] Reference Figure 3 and Figure 4In this embodiment, the main delivery pipe 24 includes a constricted section 241, a throat section 242, and a flared section 243 connected sequentially along the delivery direction. The end of the constricted section 241 opposite to the throat section 242 is connected to the substrate chamber 21, and the end of the flared section 243 opposite to the throat section 242 is connected to the input end of the delivery pump 23. The diameter of the constricted section 241 gradually decreases, increasing the flow velocity of the substrate as it flows through it. The throat section 242 is the smallest diameter part of the main delivery pipe 24. The end of the auxiliary delivery pipe 25 opposite to the masterbatch chamber 22 is connected to the throat section 242, forming an ejector interface. The diameter of the flared section 243 gradually increases, decreasing the flow velocity of the substrate as it flows through it.

[0045] When a local negative pressure is formed in the throat section 242 of the substrate, the color masterbatch is automatically drawn in using the Venturi effect and enters the flared section 243 along with the high-speed substrate flow for preliminary mixing. The diameter of the flared section 243 gradually increases, causing the flow rate of the mixture to gradually decrease, preparing it for subsequent entry into the delivery pump 23. This structural design ensures that the color masterbatch is uniformly dispersed in the substrate before entering the delivery pump 23, avoiding uneven color caused by local enrichment and agglomeration of the color masterbatch, further improving the melt mixing effect and the uniformity of the product appearance, and achieving efficient premixing without additional power.

[0046] Reference Figure 3 and Figure 4 In this embodiment, the feeding assembly 2 further includes a spiral plate 27, which is installed inside the main conveying pipe 24 and located between the end of the main conveying pipe 24 that connects to the conveying pump 23 and the connection point between the main conveying pipe 24 and the auxiliary conveying pipe 25. The spiral plate 27 is typically made of a thin metal sheet and has a spiral structure. Its function is to form a spiral flow channel inside the main conveying pipe 24, allowing the mixture of substrate and color masterbatch to rotate and advance along the spiral path during the conveying process, generating a continuous radial shear and convection mixing effect. The mixture achieves sufficient turbulent mixing during the conveying stage, further reducing defects such as color streaks or uneven shades caused by uneven mixing, and improving the quality of the finished product.

[0047] Reference Figure 5 and Figure 6In this embodiment, the transfer mechanism 4 includes a multi-axis moving arm 41, a suction assembly 42, and a telescopic drive 43. The multi-axis moving arm 41 has a fixed end 410, a first movable end 420, and a second movable end 430. The first movable end 420 can move relative to the fixed end 410 along the x-axis, y-axis, and z-axis directions. The second movable end 430 can move relative to the fixed end 410 along the x-axis and y-axis directions. The mold opening and closing direction of the injection molding machine 1 is parallel to the horizontal plane, the x-axis direction is parallel to the mold opening and closing direction of the injection molding machine 1, the y-axis direction is parallel to the horizontal plane and perpendicular to the x-axis direction, and the z-axis direction is perpendicular to the horizontal plane. The suction assembly 42 is connected to the first movable end 420 and is used to suction the top of the outer surface of the safety helmet. The top of the inner shell of the safety helmet has a sprue. The cutting pliers 31 are fixedly mounted on the second movable end 430 by bolts.

[0048] The multi-axis movable arm 41 includes a gantry 411, a first slide rail 412, a first slide block 413, a second slide rail 414, a second slide block 415, a third slide rail 416, and a third slide block 417.

[0049] The gantry 411 is fixedly installed across the injection molding station, the sprue treatment station, and the unloading station, with the fixed end 410 located on the gantry 411. The first slide rail 412 is fixed on the gantry 411 and extends in a direction parallel to the horizontal plane and perpendicular to the mold closing direction of the injection molding machine 1. The first slide block 413 is slidably connected to the first slide rail 412 and is driven to slide on the first slide rail 412; the sliding drive of the first slide block 413 can be in the form of a motor with a lead screw and nut transmission pair or a gear and rack transmission pair.

[0050] The second slide rail 414 is fixed on the first slide block 413 and extends in a direction parallel to the mold closing direction of the injection molding machine 1. The second slide block 415 is slidably connected to the second slide rail 414 and is driven to slide on the second slide rail 414; the second movable end 430 is located on the second slide block 415, and the sliding drive of the second slide block 415 can be in the form of a motor with a lead screw and nut transmission pair or a gear and rack transmission pair.

[0051] The third slide rail 416 is fixed on the second slide block 415 and extends in a direction perpendicular to the horizontal plane. The third slide block 417 is slidably connected to the third slide rail 416 and is driven to slide on the third slide rail 416; the first movable end 420 is located on the third slide block 417, and the sliding drive of the third slide block 417 can be in the form of a motor with a lead screw and nut transmission pair or a gear and rack transmission pair.

[0052] The telescopic drive component 43 is fixedly connected to the first movable end 420 and can be a cylinder or an electric push rod. The suction assembly 42 is fixedly connected to the output end of the telescopic drive component 43. The telescopic drive component 43 is used to drive the suction assembly 42 to move along the mold opening and closing direction of the injection molding machine 1 so that the sprue at the top of the inner surface of the safety helmet approaches or moves away from the shear pliers 31.

[0053] Driven by the multi-axis moving arm 41, the suction component 42 can move and position precisely in three-dimensional space, reliably picking up the safety helmet from the mold of the injection molding machine 1 and transferring it to the sprue treatment station. This achieves efficient automatic part picking and transfer, avoids product collision and deformation that may be caused by manual part picking, and provides a precise positional basis for the subsequent automatic shearing of the sprue by the shearing pliers 31, further improving the cycle efficiency and transfer reliability of automated operations.

[0054] During the process of the multi-axis moving arm 41 driving the suction assembly 42 to remove the safety helmet from the injection mold and transfer it to the material feeding station, the relative movement of the first movable end 420 and the second movable end 430 in the z-axis direction enables the top of the sprue on the inner surface of the safety helmet to be quickly aligned with the shearing pliers 31 in the mold opening and closing direction. Then, the telescopic drive component 43 drives the suction assembly 42 to move the safety helmet closer to the shearing pliers 31 along the mold opening and closing direction. The shearing pliers 31 then performs a shearing action to complete the sprue shearing.

[0055] This process overlaps the safety helmet transport path with the sprue treatment action in both space and time, merging the cycle time of simultaneous transport and cutting. This eliminates the need for a separate process of stopping at the sprue treatment station for point-to-point trimming, shortening the production cycle of individual products and improving overall production efficiency. Simultaneously, operators do not need to touch the products during the entire sprue removal process, eliminating the risk of cuts from manual trimming and further enhancing production safety.

[0056] Reference Figure 5 and Figure 6 In this embodiment, the suction assembly 42 includes a mounting base 421, a slide rod 422, a suction cup 423, an elastic element 424, and a negative pressure generating element 425. The mounting base 421 is fixedly connected to the output end of the telescopic drive element 43 by welding or bolting. One end of the slide rod 422 is slidably connected to the mounting base 421 via a linear bearing, and the sliding direction of the slide rod 422 is parallel to the mold opening and closing direction of the injection molding machine 1.

[0057] The other end of the slide bar 422 is movably connected to the suction cup 423 via a universal ball joint, allowing the suction cup 423 to rotate freely relative to the slide bar 422 to adapt to the outer surface of safety helmets with different curvatures. This expands the effective adsorption area, enhances the adsorption firmness, and prevents adsorption from falling off during high-speed transport or shear stress. At the same time, it reduces the risk of deformation of the product surface caused by localized suction concentration due to improper adsorption angle, and enhances the adaptability of the suction component 42 to the differences in the curvature of various types and helmets.

[0058] The elastic element 424 is used to drive the slide bar 422 to move away from the mounting base 421. It can be a spring, which is sleeved on the slide bar 422. The first end of the spring is fixedly connected to the mounting base 421, and the second end of the spring is fixedly connected to the slide bar 422.

[0059] The negative pressure generating element 425 can be a vacuum pump, connected to the suction cup 423 via a pipe, to generate negative pressure on the adsorption surface of the suction cup 423. After the suction cup 423 adheres to the outer surface of the safety helmet under the action of the negative pressure generating element 425, the elastic element 424 continuously drives the slide rod 422 to tend to move away from the mounting base 421, so that the adsorption force applied by the suction cup 423 to the safety helmet has flexible follow-up characteristics within the stroke of the slide rod 422.

[0060] During the transfer of the safety helmet, if the safety helmet and the suction component 42 are prone to relative displacement due to mechanical vibration or inertia, the sliding fit of the slide bar 422 and the elastic deformation of the elastic element 424 can absorb and buffer this displacement deviation, avoid leaving indentations or scratches on the surface of the safety helmet due to rigid tension, and reduce damage to the finished safety helmet.

[0061] When the telescopic drive 43 pushes the suction cup 423 to bring the safety cap closer to the shearing pliers 31 for sprue trimming, the safety cap and sprue enter the shearing position. At this time, the reaction force of the shearing pliers 31 acting on the sprue is transmitted between the safety cap and the suction cup 423. The floating support formed by the slide rod 422 and the elastic element 424 can automatically compensate for the slight error in the feed amount, preventing the safety cap from being excessively squeezed and deformed or broken. At the same time, it maintains a stable fit between the suction cup 423 and the safety cap, making the sprue trimming position more precise and controllable. This ensures that the sprue cross-section is flat and smooth, and protects the integrity of the product structure. It takes into account both the positioning accuracy and non-destructive clamping requirements in the adsorption, handling and trimming process.

[0062] Preferably, there are at least three suction components 42. The three suction components 42 can form multi-point distributed adsorption on the surface of the safety helmet, so that the parts are subjected to more balanced force and more stable posture during the handling process. This effectively suppresses the swaying and rotation that may be caused by single-point adsorption, avoids collision damage to the safety helmet during high-speed movement, ensures the positional accuracy of transfer and sprue shearing operations, and further improves the stability of equipment operation and yield.

[0063] Reference Figure 5 and Figure 6 In this embodiment, a sprue collection frame 7 for collecting sprue nozzles is provided below the shearing pliers 31. The sprue collection frame 7 is typically made of plastic or metal. The sprue nozzles separated by shearing automatically fall into the sprue collection frame 7 under gravity and are collected in a concentrated manner, effectively preventing sprue nozzle debris from scattering on the workbench or the ground. This not only keeps the work area clean and tidy and reduces the risk of personnel being injured by sprue nozzles, but also facilitates the timely recycling and reuse of sprue nozzle waste, improving production economy.

[0064] The implementation principle of this embodiment is as follows: This automated injection molding device for safety helmets achieves automatic collection and precise proportioning of the base material and color masterbatch through the feeding component 2, avoiding quality fluctuations caused by manual material preparation. The injection molding machine 1 automatically completes the injection molding process, the transfer mechanism 4 realizes the automatic transfer of safety helmets between different workstations, the shearing pliers 31 automatically cuts the sprue, and the finished product conveyor line 5 and the receiving hopper 6 realize the automatic collection of finished products. The entire device integrates automatic material preparation, automatic injection molding, automatic transfer, and automatic sprue removal functions, overcoming the difficulties of low efficiency, large quality fluctuations, and frequent safety accidents in existing manual production methods. It achieves high-efficiency, high-quality, and high-safety production of safety helmet injection molding, improving production efficiency and product quality, and reducing labor intensity and management costs.

[0065] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automated injection molding device for safety helmets, characterized in that, include: Injection molding machine (1), located at the injection molding station, is used to injection mold safety helmets; The feeding assembly (2) includes a substrate bin (21), a color masterbatch bin (22), a delivery pump (23), a main delivery pipe (24), a secondary delivery pipe (25), and a flow control valve (26); one end of the main delivery pipe (24) is connected to the substrate bin (21), and the other end of the main delivery pipe (24) is connected to the input end of the delivery pump (23); the output end of the delivery pump (23) is connected to the hopper of the injection molding machine (1); One end of the secondary conveying pipe (25) is connected to the color masterbatch chamber (22), and the other end of the secondary conveying pipe (25) is connected to the main conveying pipe (24). The angle between the end of the main conveying pipe (24) connected to the substrate chamber (21) and the secondary conveying pipe (25) is an acute angle or a right angle. The flow control valve (26) is located on the secondary conveying pipe (25). The shearing assembly (3) is located at the sprue treatment station and is used to shear the sprue on the safety helmet. The transfer mechanism (4) is set across the injection molding station and the sprue treatment station for transferring safety helmets between the injection molding station and the sprue treatment station.

2. The automated injection molding device for safety helmets according to claim 1, characterized in that: The main conveying pipe (24) includes a constricted section (241), a throat section (242), and a flared section (243) connected sequentially along the conveying direction; the secondary conveying pipe (25) is connected to the throat section (242) at one end away from the color masterbatch chamber (22).

3. The automated injection molding device for safety helmets according to claim 1, characterized in that: The feeding assembly (2) also includes a spiral plate (27), which is disposed in the main conveying pipe (24) and located between one end of the main conveying pipe (24) that connects to the conveying pump (23) and the connection point between the main conveying pipe (24) and the auxiliary conveying pipe (25), for forming a spiral flow channel in the main conveying pipe (24).

4. The automated injection molding device for safety helmets according to claim 1, characterized in that: The transfer mechanism (4) includes a multi-axis moving arm (41) and a suction assembly (42); the multi-axis moving arm (41) has a fixed end (410) and a first movable end (420) that can move relative to the fixed end (410) along the x-axis, y-axis and z-axis directions respectively; the suction assembly (42) is connected to the first movable end (420) and is used to suction the safety helmet.

5. The automated injection molding device for safety helmets according to claim 4, characterized in that: The multi-axis moving arm (41) also has a second movable end (430) that can move relative to the fixed end (410) along the x-axis and y-axis directions respectively. The shearing assembly (3) is disposed on the second movable end (430). The transfer mechanism (4) also includes a telescopic drive (43) fixed to the first movable end (420). The suction assembly (42) is connected to the output end of the telescopic drive (43). The telescopic drive (43) is used to drive the suction assembly (42) to move closer to or away from the shearing assembly (3) along the mold opening and closing direction of the injection molding machine (1).

6. The automated injection molding device for safety helmets according to claim 5, characterized in that: The suction assembly (42) includes a mounting base (421), a slide rod (422), a suction cup (423), an elastic element (424), and a negative pressure generator (425); the mounting base (421) is fixedly connected to the output end of the telescopic drive (43); one end of the slide rod (422) is slidably connected to the mounting base (421), and the other end of the slide rod (422) is connected to the suction cup (423); the sliding direction of the slide rod (422) is parallel to the mold opening and closing direction of the injection molding machine (1), the elastic element (424) is used to drive the slide rod (422) to tend to move away from the mounting base (421); the negative pressure generator (425) is used to generate negative pressure on the suction surface of the suction cup (423).

7. The automated injection molding device for safety helmets according to claim 6, characterized in that: The slide bar (422) and the suction cup (423) are movably connected by a universal ball joint.

8. The automated injection molding device for safety helmets according to claim 4, characterized in that: The suction component (42) has at least three parts.

9. The automated injection molding device for safety helmets according to claim 1, characterized in that: It also includes a finished product conveyor line (5) and a receiving hopper (6); one end of the finished product conveyor line (5) extends to the unloading station, and the other end of the finished product conveyor line (5) extends above the receiving hopper (6); the transfer mechanism (4) is also used for the transfer of safety helmets between the sprue treatment station and the unloading station.

10. The automated injection molding device for safety helmets according to claim 1, characterized in that: Below the shearing component (3) is a water inlet collection frame (7) for collecting water inlets.

Images