Injection molding machine capable of achieving multi-station cyclic operation and efficient feeding

Abstract

The invention relates to the technical field of injection molding of injection molding machines, in particular to a multi-station circulating operation and efficient feeding injection molding machine which comprises a rotating table, four containing grooves are formed in the rotating table, containing frames are arranged in the four containing grooves, a waste heat circulating preheating mechanism is arranged at the upper end of the rotating table, and the waste heat circulating preheating mechanism comprises a waste heat circulating preheating mechanism body. The device comprises a mounting plate, a heat collection assembly, a heat transmission assembly and a heat release assembly. The two ends of the mounting plate respectively cover the cooling station and the waiting station; the heat collecting assembly is used for collecting heat of the mold on the cooling station; the heat transfer assembly is used for transferring the heat collected by the heat collection assembly to the heat release assembly; the heat release assembly is used for heating the mold on the waiting station; the heat collecting assembly, the heat transmission assembly and the heat release assembly are arranged, so that waste heat is recycled, and the fluidity of raw materials in the mold cavity is improved.

Description

Technical Field

[0001] This invention application relates to the field of injection molding technology, specifically to an injection molding machine with multi-station cyclic operation and high-efficiency material feeding. Background Technology

[0002] In the injection molding industry, multi-station cyclic injection molding machines have become the mainstream equipment for improving production efficiency because they can perform parallel processing of feeding, injection, cooling, and unloading. By rotating multiple stations, the time wasted waiting for cooling and unloading in single-station operations can be avoided, significantly improving the continuous production capacity of the equipment and meeting the needs of large-scale production.

[0003] Patent CN119928154A discloses an injection molding machine for processing rubber products with easy material loading. Its working principle is as follows: the raw material of the rubber product is loaded through the feeding groove, and the telescopic cylinder drives the injection head to dock with the mold to complete the injection; the first servo motor drives the support table and the rotary table to rotate, driving multiple molds to move in turn along the bottom of the injection head, realizing parallel operation of injection and cooling at the same time; the centering component locks and releases the mold through the limiting frame, and works with the concentric component to ensure the positioning accuracy during the rotation of the mold; the side insertion component ensures the precise fit between the injection head and the mold by the slope of the moving cone and the side ear plate, thus improving the injection stability.

[0004] Although the above solution enables parallel injection and cooling operations, improving production efficiency and injection precision, the problem of waste heat is prominent. After the high-temperature mold that has just finished injection enters the cooling station, a large amount of waste heat is directly dissipated into the surrounding environment, which not only causes serious energy waste, but also causes the local temperature of the rotary table and surrounding area to rise, affecting the cooling of subsequent high-temperature molds. At the same time, the low-temperature mold that has finished unloading lacks a preheating process. When it directly enters the injection station and comes into contact with the high-temperature molten material, the large temperature difference causes the material fluidity to decrease, which easily leads to molding defects such as uneven injection, missing material, and shrinkage marks, affecting product quality. Summary of the Invention

[0005] To address the aforementioned issues, a multi-station, cyclical, high-efficiency injection molding machine is provided. By incorporating heat collection, heat transfer, and heat release components, waste heat is recovered and reused, improving the flowability of raw materials within the mold cavity and ensuring uniform injection and product molding quality.

[0006] To address the problems of existing technologies, this invention provides a multi-station cyclic operation high-efficiency material feeding injection molding machine, including a rotary table located at the lower end of the injection molding machine body and in the middle of the injection station, cooling station, unloading station, and waiting station. Four placement slots are equally spaced around the center of the rotary table, and each of the four slots contains a placement rack for placing molds. A waste heat circulation preheating mechanism is located at the upper end of the rotary table, comprising a mounting plate, a heat collection component, a heat transfer component, and a heat release component. The two ends of the mounting plate cover the cooling station and the waiting station, respectively. The heat collection component is located on the mounting plate at the end covering the cooling station and is used to collect heat from the mold at the cooling station. The heat transfer component is located in the middle of the mounting plate and is used to transfer the heat collected by the heat collection component to the heat release component. The heat release component is located on the mounting plate at the end covering the waiting station and is used to heat the mold at the waiting station.

[0007] Preferably, the heat collection assembly includes a heat collection hood, which includes a semi-ring and a cover plate. The inner cavities of the semi-ring and the cover plate are connected and contain a medium. The semi-ring is used to absorb heat from the side of the placement rack, and a first inlet and a first outlet are provided on the semi-ring. The cover plate is used to absorb heat from the top of the placement rack.

[0008] Preferably, the heat collection assembly further includes a plurality of first heat-conducting fins, which are arranged at equal intervals from top to bottom on the inner wall surface of the semi-annulus.

[0009] Preferably, the heat release assembly includes a heat transfer shroud and a plurality of second heat-conducting fins; the heat transfer shroud is used to transfer heat to the mold in the waiting position, and the heat transfer shroud has a second inlet and a second outlet; the plurality of second heat-conducting fins are arranged at equal intervals from top to bottom on the inner wall surface of the heat transfer shroud.

[0010] Preferably, the heat transfer assembly includes two flow channels, both of which are used to connect the heat collection hood and the heat transfer hood. Each of the two flow channels has a built-in unidirectional pump, and the two unidirectional pumps control the flow direction of the medium in the two flow channels to be opposite.

[0011] Preferably, the waste heat circulation preheating mechanism further includes a control mechanism, which includes two rotary drives. The two rotary drives are respectively disposed at both ends of the mounting plate and are respectively connected to the heat collection hood and the heat transfer hood.

[0012] Preferably, the control mechanism further includes two movable plates and a synchronous moving structure; the two movable plates are slidably disposed at both ends of the mounting plate, and the two movable plates are respectively connected to the heat collection cover and the heat transfer cover; the synchronous moving structure is disposed in the middle of the mounting plate, and the synchronous moving structure is connected to the two movable plates.

[0013] Preferably, the control mechanism further includes two guide structures, which are respectively connected to two movable plates, and the guide structures are used to limit the movement direction of the movable plates.

[0014] Preferably, multiple fin slots are provided at equal intervals from top to bottom on the outer wall of the placement slot.

[0015] Preferably, the heat transfer assembly further includes a docking control assembly, which is used to control the connection between the two flow guide pipes and the heat collection hood and the heat transfer hood.

[0016] The advantages of this invention application compared to the prior art are: 1. This invention application includes a heat collection component, a heat transfer component, and a heat release component. The waste heat from the high-temperature mold at the cooling station is transferred to the low-temperature mold at the waiting station through the heat collection component and the heat transfer component. The heat release component then applies the waste heat to the low-temperature mold, completing the recycling of waste heat. With the rotation of the rotary table, the four molds flow sequentially between the four stations. The waste heat recycling preheating mechanism continuously preheats the unloaded molds transferred to the waiting station, ensuring that each mold entering the injection station is within the preset temperature range. This achieves the recovery and reuse of waste heat, improves the flowability of raw materials in the mold cavity, and ensures the uniformity of injection and the quality of product molding.

[0017] 2. This invention application provides a heat collection hood, in which a semi-ring body and a cover plate cooperate to form a semi-enclosed structure, enclosing the main heat dissipation area of ​​the mold, effectively blocking the heat from dissipating to the surrounding environment, and maximizing the accumulation of heat released by the mold within the semi-enclosed structure space. As the heat accumulates, the temperature within the space gradually increases, and the medium in the inner cavity of the heat collection hood quickly absorbs this heat through thermal conduction, realizing the heat transfer from the mold to the medium. The high-temperature medium after absorbing heat will flow out through the first outlet on the semi-ring body and enter the heat transfer component, providing an energy source for subsequent waste heat utilization. At the same time, new low-temperature medium is replenished into the inner cavity of the collection hood through the first inlet, ensuring the continuous heat collection process, thereby realizing the efficient transfer of the mold's thermal energy to the transport medium inside the heat collection hood.

[0018] 3. This invention application sets up multiple first heat-conducting fins. The first heat-conducting fins act as bridges for heat transfer, accelerating the transfer of heat from the mold to the heat collection cover, and promoting a rapid drop in mold temperature. This results in a shorter dwell time of the mold at the cooling station and improves production cycle time. Attached Figure Description

[0019] Figure 1 This is a perspective view of the rotary table, placement rack, and waste heat circulation preheating mechanism in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0020] Figure 2 This is a perspective view of the placement tank, mounting plate, heat collection component, heat transfer component, heat release component, and control mechanism in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding according to the present invention application.

[0021] Figure 3 This is a perspective view of the mounting plate, heat collection hood, heat transfer component, heat transfer cover, and control mechanism in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0022] Figure 4 This is a perspective view of the heat collection hood, guide pipe, docking control component, and heat transfer hood in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding according to the present invention.

[0023] Figure 5 This is a perspective view of the heat collection hood and the first heat-conducting fin in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0024] Figure 6 This is a perspective view of the flow guide pipe, docking control components, and heat transfer cover in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding according to this invention application.

[0025] Figure 7 This is a perspective view of the heat transfer cover and the second heat-conducting fin in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0026] Figure 8 This is a perspective view of the guide pipe, the first linear actuator, and the connecting bracket in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding according to the present invention.

[0027] Figure 9 This is a perspective view of the mounting plate, heat collection hood, heat transfer hood, rotary drive, moving plate, synchronous moving structure and guide structure in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding according to the present invention application.

[0028] Figure 10 This is a perspective view of the mounting plate, moving plate, synchronous moving structure, and guiding structure in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0029] Figure 11 This is a perspective view of the placement tank in an injection molding machine with multi-station cyclic operation and high-efficiency material feeding, as described in this invention application.

[0030] The diagram is labeled as follows: 1. Rotary table; 11. Placement slot; 111. Fin slot; 2. Placement rack; 3. Waste heat circulation preheating mechanism; 31. Mounting plate; 32. Heat collection assembly; 321. Heat collection hood; 3211. Semi-ring; 3212. Cover plate; 3213. First inlet; 3214. First outlet; 322. First heat-conducting fin; 33. Heat transfer assembly; 331. Flow guide pipe; 332. Docking control assembly; 3321. First linear actuator; 3322, connecting bracket; 34, heat release assembly; 341, heat transfer hood; 3421, second inlet; 3422, second outlet; 342, second heat-conducting fin; 35, control mechanism; 351, rotary actuator; 352, moving plate; 353, synchronous movement structure; 3531, second linear actuator; 3532, drive plate; 354, guide structure; 3541, guide rod; 3542, buffer spring. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figures 1 to 11 As shown: A multi-station cyclic operation high-efficiency material feeding injection molding machine includes a rotary table 1 located at the lower end of the injection molding machine body and in the middle of the injection station, cooling station, unloading station, and waiting station. Four placement slots 11 are equally spaced around the center of the rotary table 1, and each of the four placement slots 11 is equipped with a placement rack 2 for placing molds. A waste heat circulation preheating mechanism 3 is located at the upper end of the rotary table 1. The waste heat circulation preheating mechanism 3 includes a mounting plate 31, a heat collection component 32, a heat transfer component 33, and a heat release component 34. The two ends of the mounting plate 31 cover the cooling station and the waiting station, respectively; the heat collection component 32 is set on the mounting plate 31 at the end covering the cooling station, and the heat collection component 32 is used to collect the heat of the mold at the cooling station; the heat transfer component 33 is set in the middle of the mounting plate 31, and the heat transfer component 33 is used to transfer the heat collected by the heat collection component 32 to the heat release component 34; the heat release component 34 is set on the mounting plate 31 at the end covering the waiting station, and the heat release component 34 is used to heat the mold at the waiting station.

[0033] Before the equipment starts, the four placement slots 11 on the rotary table 1 correspond to the injection molding station, cooling station, unloading station, and waiting station, respectively. No molds are placed in any of the placement slots 11. When the equipment starts working, the operator places the first mold in the placement slot 11 at the injection molding station. Then, the injection molding machine body docks with the first mold, injecting molten material into the mold cavity. After injection, the injection molding machine body separates from the first mold, and the rotary table 1 starts and rotates 90 degrees for the first time. This rotation moves the placement slot 11 carrying the first mold from the injection molding station to the cooling station, allowing the high-temperature material inside the first mold to enter the cooling system. During the cooling and molding stage, the empty placement slot 11, which was originally in the waiting position, rotates to the injection molding position. The operator places the second mold in the slot, and the injection molding machine repeats the docking, injection, and separation process. After completion, the rotary table 1 rotates 90 degrees for the second time. At this point, the first mold has completed cooling and molding at the cooling position and has been transferred to the unloading position. The operator unloads the mold, and the second mold is transferred to the cooling position to begin cooling. The empty placement slot 11, which was originally in the unloading position, rotates to the injection molding position, places the third mold in the slot, and completes the injection. After the third mold is filled, the rotary table 1 rotates 90 degrees for the third time. After this position change... The third mold, which has just completed injection and has a higher temperature, is transferred to the cooling station via the placement tank 11. Meanwhile, the first mold, which has completed unloading at the unloading station and has a lower temperature, is transferred to the waiting station. At this time, the waste heat circulation preheating mechanism 3 is activated. The heat collection component 32 on the mounting plate 31, corresponding to the cooling station, comes into contact with the third mold and begins collecting the waste heat released during the cooling process. The collected heat is transferred through the heat transfer component 33 to the heat release component 34, which comes into contact with the first mold in the waiting station, releasing the received waste heat to the first mold at a lower temperature. Preheating is performed to achieve heat recycling. When the rotary table 1 rotates 90 degrees for the fourth time, the first mold that has been preheated is transferred from the waiting station to the injection station. The injection molding machine body can directly inject molten raw material into it. At this time, the first mold has reached a suitable temperature due to preheating. The four molds are transferred between the four stations in sequence. The waste heat recycling preheating mechanism 3 continuously preheats the unloaded molds transferred to the waiting station to ensure that each mold entering the injection station is within the preset temperature range. This realizes the recovery and reuse of waste heat, improves the fluidity of the raw material in the mold cavity, and ensures the uniformity of injection and the quality of product molding.

[0034] Reference Figure 2 , Figure 4 and Figure 5As shown: The heat collection assembly 32 includes a heat collection cover 321, which includes a semi-ring 3211 and a cover plate 3212. The inner cavities of the semi-ring 3211 and the cover plate 3212 are connected and contain a medium. The semi-ring 3211 is used to absorb heat from the side of the placement rack 2, and a first inlet 3213 and a first outlet 3214 are provided on the semi-ring 3211. The cover plate 3212 is used to absorb heat from the top of the placement rack 2.

[0035] When the rotary table 1 rotates the high-temperature mold that has just finished injection to the cooling station, the heat collection assembly 32 is activated. First, the heat collection cover 321, which is mounted on the cooling station end of the mounting plate 31, begins to operate. The semi-annular body 3211 of the heat collection cover 321 covers the side wall of the mold, thus enveloping the side of the mold. At the same time, the cover plate 3212 covers the upper surface of the mold, thus covering the top of the mold. At this time, the semi-annular body 3211 and the cover plate 3212 form a "semi-enclosed" space, enclosing the main heat dissipation area of ​​the mold. During the cooling and molding process, the mold will continuously release heat to the outside, and the heat collection cover 321 effectively prevents the heat from being released. The heat released is confined to the space as it dissipates into the surrounding environment. As the heat accumulates, the temperature inside the space gradually rises. The medium in the inner cavity of the heat collection hood 321 quickly absorbs this heat through thermal conduction, realizing the heat transfer from the mold to the medium. The high-temperature medium after absorbing heat will flow out through the first outlet 3214 on the semi-annulus 3211 and enter the heat transfer component 33, providing an energy source for subsequent waste heat utilization. At the same time, new low-temperature medium is replenished into the inner cavity of the collection hood through the first inlet 3213, ensuring the continuous heat collection process, thereby realizing the efficient transfer of the mold's heat energy to the transport medium inside the heat collection hood 321.

[0036] Reference Figure 5 As shown: The heat collection assembly 32 also includes a plurality of first heat-conducting fins 322, which are arranged at equal intervals from top to bottom on the inner wall of the semi-annular body 3211.

[0037] During the cooling process, the mold continuously releases heat. Part of this heat is directly transferred to the inner wall of the semi-annular body 3211 via heat conduction, while the remaining heat heats the air in the space, forming a high-temperature air layer. Because the first heat-conducting fins 322 are evenly distributed on the inner side of the semi-annular body 3211, the contact area between the heat collection cover 321 and the high-temperature air is expanded. After the high-temperature air comes into contact with the first heat-conducting fins 322, heat is rapidly transferred to the first heat-conducting fins 322, and then conducted from the first heat-conducting fins 322 to the body of the semi-annular body 3211, and finally to the semi-annular body 3211. The heat from 11 and the first heat-conducting fin 322 is rapidly absorbed by the medium flowing in its inner cavity. The medium, after absorbing heat, enters the heat transfer assembly 33 through the first outlet 3214 of the semi-annular body 3211, while the low-temperature medium is continuously replenished through the first inlet 3213 to ensure that the heat absorption process continues. During this process, the first heat-conducting fin 322 acts as a bridge for heat transfer, accelerating the transfer of mold heat to the heat collection cover 321 and driving the mold temperature to drop rapidly. This results in a shorter dwell time of the mold at the cooling station and improves the production cycle.

[0038] Reference Figure 2 , Figure 6 and Figure 7 As shown: The heat release component 34 includes a heat transfer cover 341 and a plurality of second heat-conducting fins 342; the heat transfer cover 341 is used to transfer heat to the mold in the waiting position. The heat transfer cover 341 has a second inlet 3421 and a second outlet 3422. The structure and size of the heat transfer cover 341 are the same as those of the heat absorption cover. The second inlet 3421 is connected to the first outlet 3214 through the heat transfer component 33, and the second outlet 3422 is connected to the first inlet 3213 through the heat transfer component 33, forming a medium circulation channel; the plurality of second heat-conducting fins 342 are arranged at equal intervals from top to bottom on the inner wall of the heat transfer cover 341.

[0039] The high-temperature medium flowing out from the first outlet 3214 of the heat collection hood 321 is transported to the second inlet 3421 of the heat transfer hood 341 through the heat transport assembly, and is continuously injected into the inner cavity of the heat transfer hood 341. The high-temperature medium flows in the inner cavity of the heat transfer hood 341, transferring the heat it carries through the hood wall to the entire structure of the heat transfer hood 341, causing the overall temperature of the heat transfer hood 341 to rise rapidly. Multiple second heat-conducting fins 342 on the inner wall of the heat transfer hood 341 are heated simultaneously. These second heat-conducting fins 342 are an integral structure with the heat transfer hood 341. Heat is rapidly transferred from the heat transfer hood 341 to the second heat-conducting fins 342 through heat conduction. At this time, the heat transfer path is divided into two paths: one is the direct heat transfer through the wall of the heat transfer hood 341. First, heat is conducted to the side wall of the mold. Second, the second heat-conducting fins 342 heat the air between the heat transfer cover 341 and the mold, forming thermal convection to assist heat transfer. The low-temperature medium, after releasing most of its heat, flows out through the second outlet 3422 on the heat transfer cover 341, and is then transported back to the first inlet 3213 of the heat collection cover 321 via the heat transfer component 33, re-entering the heat collection stage to absorb residual heat and complete one medium cycle. As the medium continues to circulate, the heat release component 34 continuously transfers the residual heat obtained from the collection end to the low-temperature mold waiting at the work station until the mold temperature rises to the preset injection molding adaptation temperature, thereby realizing that heat can be quickly transferred from the heat collection cover 321 to the surface and interior of the mold, improving the heating speed of the low-temperature mold.

[0040] Reference Figure 4 and Figure 8 As shown: The heat transfer assembly 33 includes two flow channels 331, both of which are used to connect the heat collection hood 321 and the heat transfer hood 341. Both flow channels 331 have built-in one-way pumps, and the two one-way pumps control the flow direction of the medium in the two flow channels 331 to be opposite.

[0041] After the two heat collection hoods 321 and the heat transfer hood 341 cover the two molds respectively, the one-way pump in the guide pipe 331 connecting the first outlet 3214 and the second inlet 3421 is started. The one-way pump drives the medium in the guide pipe 331 to flow from the first outlet 3214 to the second inlet 3421. The high-temperature medium flows out from the heat collection hood 321 and is transported to the inner cavity of the heat transfer hood 341 through the guide pipe 331, providing a heat source for preheating the low-temperature mold. At the same time, the first... The one-way pump in the guide pipe 331 of the inlet 3213 and the second outlet 3422 is started. The one-way pump drives the medium in the guide pipe 331 to flow from the second outlet 3422 to the first inlet 3213. The low temperature medium that has released heat in the heat transfer shroud 341 is drawn back to the heat collection shroud 321 through the pipe to reabsorb the residual heat of the cooling station mold and complete one medium cycle, thereby realizing the circulation of the medium between the heat collection shroud 321 and the heat transfer shroud 341.

[0042] Reference Figure 3 and Figure 9 As shown: The waste heat circulation preheating mechanism 3 also includes a control mechanism 35. The control mechanism 35 includes two rotary drivers 351, which are respectively disposed at both ends of the mounting plate 31, and are respectively connected to the heat collection hood 321 and the heat transfer hood 341.

[0043] During the cooling process, the heat emitted by the mold is transferred to the rotary table 1, which in turn transfers heat to the adjacent molds in the injection station. This causes uneven temperature distribution on both sides of the molds in the injection station. Therefore, two rotary actuators 351 are installed. When the two molds rotate to the cooling station and the waiting station respectively, the two rotary actuators 351 are started synchronously. The two rotary actuators 351 drive the heat collection cover 321 and the heat transfer cover 341 to rotate respectively. Both the heat collection cover 321 and the heat transfer cover 341 move between the placement slot 11 and the rotary table 1, thereby effectively preventing the heat from the high-temperature mold in the cooling station from spreading to the adjacent injection station through the rotary table 1, ensuring uniform temperature distribution on both sides of the mold in the injection station.

[0044] Reference Figure 9 and Figure 10 As shown: The control mechanism 35 also includes two movable plates 352 and a synchronous moving structure 353; the two movable plates 352 are respectively slidably disposed at both ends of the mounting plate 31, and the two movable plates 352 are respectively connected to the heat collection cover 321 and the heat transfer cover 341; the synchronous moving structure 353 is disposed in the middle of the mounting plate 31, and the synchronous moving structure 353 is connected to the two movable plates 352.

[0045] Specifically, the synchronous movement structure 353 includes a second linear driver 3531 and two drive plates 3532. The second linear driver 3531 is disposed in the middle of the mounting plate 31, and the two drive plates 3532 are respectively disposed on both sides of the second linear driver 3531. The two ends of the drive plates 3532 are respectively hinged to the mounting plate 31 and the output end of the second linear driver 3531.

[0046] When the rotary table 1 rotates, if the heat collection cover 321 and the heat transfer cover are too close to the rotary table 1, the rotary table 1 will come into contact with the heat collection cover 321 and the heat transfer cover, affecting the rotation of the rotary table 1. By setting two moving blocks and a synchronous moving structure 353, in the initial state, the heat collection cover 321 and the heat transfer cover are both in a state far away from the rotary table 1. When it is necessary to preheat the mold waiting in the work station, the second linear driver 3531 applies a force to the two drive plates 3532 at the same time, so that the included angle between the two drive plates 3532 decreases. The two moving plates 352 move closer to each other under the drive of the two drive plates 3532, so that the heat collection cover 321 and the heat transfer cover move closer to each other synchronously. Approaching the rotary table 1, the two rotary drivers 351 are then activated, driving the heat collection cover 321 and the heat transfer cover to rotate synchronously. After the mold preheating is completed, the two rotary drivers 351 work in opposite directions, driving the heat collection cover 321 and the heat transfer cover to rotate in opposite directions and reset. Then, the second linear driver 3531 applies force to the two drive plates 3532 simultaneously, increasing the angle between the two drive plates 3532. The two moving plates 352 move away from each other under the drive of the two drive plates 3532. Therefore, the heat collection cover 321 and the heat transfer cover move away from the rotary table 1 synchronously, thereby effectively avoiding mechanical collisions between the rotary table 1 and the heat collection cover 321 and the heat transfer cover 341 when the rotary table 1 rotates.

[0047] Reference Figure 9 and Figure 10 As shown: The control mechanism 35 also includes two guide structures 354, which are respectively connected to two moving plates 352. The guide structures 354 are used to limit the movement direction of the moving plates 352.

[0048] Specifically, the guide structure 354 includes two guide rods 3541, which are parallel to each other. The moving plate 352 is slidably connected to the two guide rods 3541, and buffer springs 3542 are sleeved at both ends of the guide rods 3541.

[0049] When the second linear actuator 3531 drives the two drive plates 3532 to reduce the included angle, pushing the moving plate 352 to slide towards the center of the mounting plate 31, the two parallel guide rods 3541 in the guide structure 354 restrict the movement direction of the moving plate 352, so that the moving plate 352 can only move linearly along the axis of the guide rods 3541, avoiding lateral deviation or rotation of the moving plate 352 during the movement. During this process, the coefficient of sliding friction between the moving plate 352 and the guide rods 3541 is small. Driven by the synchronous moving structure 353, the two moving plates 352 synchronously approach the rotary table 1 along the guide rods 3541, driving the heat collection cover 321 and the heat transfer cover 341 to approach the target position. When the moving plate 352 approaches the guide rods... When the guide rod 3541 reaches the end, the end face of the moving plate 352 first contacts the buffer spring 3542 on the guide rod 3541. The buffer spring 3542 is compressed, converting the kinetic energy of the moving plate 352 into the elastic potential energy of the buffer spring 3542, causing the moving speed of the moving plate 352 to gradually decrease until it stops smoothly. This flexible buffering method ensures that the heat collection cover 321 and the heat transfer cover 341 reach the working position smoothly. The guiding effect of the guide structure 354 enables the heat collection cover 321 and the heat transfer cover 341 to be accurately aligned with the mold at the cooling station and the waiting station, thereby avoiding the heat collection cover 321 and the heat transfer cover 341 from not fitting tightly with the mold due to movement deviation, and ensuring the waste heat collection and preheating effect.

[0050] Reference Figure 2 and Figure 11 As shown: Multiple fin slots 111 are provided at equal intervals from top to bottom on the outer wall of the placement slot 11.

[0051] When the rotary driver 351 drives the heat collection cover 321 to rotate, the multiple first heat-conducting fins 322 on the heat collection cover 321 enter the multiple fin grooves 111 respectively. The fin grooves 111 increase the surface area of ​​the outer wall of the placement groove 11, so that the heat transferred to the placement groove 11 can be quickly released into the air through a larger area and quickly transferred to the first heat-conducting fins 322. Similarly, the placement groove 11 in the waiting position has a larger area in contact with the air, so that the heat can be quickly transferred to the placement groove 11 and the mold on it, thereby realizing the rapid and efficient transfer of heat.

[0052] Reference Figure 4 , Figure 6 and Figure 8 As shown: The heat transfer assembly 33 also includes a docking control assembly 332, which is used to control the connection between the two flow guide pipes 331 and the heat collection cover 321 and the heat transfer cover 341.

[0053] Specifically, the docking control component 332 includes a first linear actuator 3321 and a connecting bracket 3322. The first linear actuator 3321 is mounted on the heat transfer cover 341, and the connecting bracket 3322 is located at the output end of the first linear actuator 3321 and is connected to two flow guide pipes 331.

[0054] Since both the heat collection hood 321 and the heat transfer hood 341 need to rotate, if the guide pipe 331 remains fixedly connected to the heat collection hood 321 and the heat transfer hood 341, then the guide pipe 331 will undergo significant deformation during the rotation of the heat collection hood 321 and the heat transfer hood 341. By setting up a docking start-up assembly, after both the heat collection hood 321 and the heat transfer hood 341 have rotated and covered the two molds, the first linear actuator 3321 pushes the connecting bracket 3322 to move towards the heat collection hood 321. The bracket 3322 drives two flow guide pipes 331 to connect with the first inlet 3213 and the first outlet 3214 on the heat collection cover 321, respectively, so that the inner cavities of the heat collection cover 321 and the heat transfer cover 341 are connected. When the heat collection cover 321 and the heat transfer cover 341 need to be separated, the first linear actuator 3321 pushes the connecting bracket 3322 to move in the direction of the bracket, so that the two flow guide pipes 331 are separated from the first inlet 3213 and the first outlet 3214, thereby avoiding large deformation of the flow guide pipes 331 that would affect the flow of the medium.

[0055] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A multi-station cyclic operation high-efficiency feeding injection molding machine, comprising a rotating table (1) arranged at the lower end of the injection molding machine body and in the middle of the injection molding station, the cooling station, the unloading station and the waiting station, four placing grooves (11) are arranged at equal intervals around the center of the rotating table (1), and a placing rack (2) for placing a mold is arranged in each of the four placing grooves (11), characterized in that, The upper end of the rotating table (1) is provided with a waste heat circulation preheating mechanism (3), the waste heat circulation preheating mechanism (3) comprises a mounting plate (31), a heat collection assembly (32), a heat transfer assembly (33) and a heat release assembly (34); The two ends of the mounting plate (31) cover a cooling station and a waiting station respectively; The heat collection assembly (32) is arranged at one end of the mounting plate (31) covering the cooling station, and the heat collection assembly (32) is used for collecting the heat of the mold in the cooling station; The heat transfer assembly (33) is arranged at the middle part of the mounting plate (31), and the heat transfer assembly (33) is used for transferring the heat collected by the heat collection assembly (32) to the heat release assembly (34); The heat release assembly (34) is arranged at one end of the mounting plate (31) covering the waiting station, and the heat release assembly (34) is used for heating the mold in the waiting station.

2. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 1, characterized in that, The heat collection assembly (32) comprises a heat collection cover (321), the heat collection cover (321) comprises a semi-ring body (3211) and a cover plate (3212), and the inner cavities of the semi-ring body (3211) and the cover plate (3212) are communicated and contain medium; The semi-ring body (3211) is used for absorbing the heat of the side part of the placing rack (2), and the semi-ring body (3211) is provided with a first inlet (3213) and a first outlet (3214); The cover plate (3212) is used for absorbing the heat of the top part of the placing rack (2).

3. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 2, characterized in that, The heat collection assembly (32) further comprises a plurality of first heat-conducting fins (322), and the plurality of first heat-conducting fins (322) are arranged on the inner side wall surface of the semi-ring body (3211) at equal intervals from top to bottom.

4. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 1, characterized in that, The heat release assembly (34) comprises a heat transfer cover (341) and a plurality of second heat-conducting fins (342); The heat transfer cover (341) is used for transferring heat to the mold in the waiting station, and the heat transfer cover (341) is provided with a second inlet (3421) and a second outlet (3422); The plurality of second heat-conducting fins (342) are arranged on the inner side wall surface of the heat transfer cover (341) at equal intervals from top to bottom.

5. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 1, characterized in that, The heat transfer assembly (33) comprises two flow guide pipes (331), and the two flow guide pipes (331) are used for connecting the heat collection cover (321) and the heat transfer cover (341), and the two flow guide pipes (331) are each provided with a one-way pump, and the two one-way pumps control the flow directions of the media in the two flow guide pipes (331) to be opposite.

6. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 1, characterized in that, The waste heat circulation preheating mechanism (3) further comprises a control mechanism (35), the control mechanism (35) comprises two rotary drives (351), the two rotary drives (351) are arranged at the two ends of the mounting plate (31) respectively, and the two rotary drives (351) are connected with the heat collection cover (321) and the heat transfer cover (341) respectively.

7. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 6, characterized in that, The control mechanism (35) further comprises two moving plates (352) and a synchronous moving structure (353); The two moving plates (352) are slidingly arranged at the two ends of the mounting plate (31) respectively, and the two moving plates (352) are connected with the heat collection cover (321) and the heat transfer cover (341) respectively; The synchronous moving structure (353) is arranged at the middle part of the mounting plate (31), and the synchronous moving structure (353) is connected with the two moving plates (352).

8. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 7, characterized in that, The control mechanism (35) further comprises two guide structures (354), the two guide structures (354) are connected with the two moving plates (352) respectively, and the guide structure (354) is used for limiting the moving direction of the moving plate (352).

9. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 1, characterized in that, A plurality of fin grooves (111) are arranged on the outer side wall surface of the placing groove (11) in equal intervals from top to bottom.

10. The multi-station cyclic operation high-efficiency feeding injection molding machine according to claim 5, characterized in that, The heat transfer assembly (33) further comprises a butt joint control assembly (332), the butt joint control assembly (332) is used for controlling the two flow guide pipes (331) to communicate the heat collection cover (321) and the heat transfer cover (341).

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