Multi-station injection molding machine

Abstract

The invention provides a multi-station injection molding machine, and relates to the field of die-casting molding, the multi-station injection molding machine comprises a molding machine, and four compression mechanisms are arranged on the side face of the molding machine in a circumferential array mode. In order to solve the problem that the machining efficiency is low due to long cooling time, four or more die stations are adopted, injection is conducted firstly, then compression is conducted, after the outer surface of a product is shaped, a workpiece in a die of the forming station is moved to the cooling station, and then external pressure is continuously applied to the product in a die cavity; the first set of mold is formed and compressed at the central station, is moved out and then reaches the mold pressing cooling station, and then mold closing pressure is applied to ensure that the mold cavity can keep that the injection molding product can continuously apply pressure to the product along with the volume change of cooling shrinkage, so that the consistency of the appearance after shrinkage is ensured; and the injection molding product is continuously cooled until the injection molding product is completely shaped, and the compression work is continuously performed at the previous station, so that the processing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of die casting, in particular to a multi-station injection molding machine. Background Art

[0002] Traditional thick-walled optical lens products have a wall thickness of 15-50mm. There are currently two molding methods: one is three-shot injection molding, each time molding one-third of the wall thickness to reduce internal stress and improve efficiency. The investment cost is high and the yield rate is not high. The second is long-term high-pressure molding, which is inefficient and has large differences in product optical consistency. Therefore, the current processing method is inefficient and has a low yield rate.

[0003] For example, the Chinese invention patent (application number: CN202311318967.X) discloses a "filter press plate injection molding device". Its specification discloses that when injection molding the filter press plate, an injection molding machine is generally used to fill the mold with polystyrene melt, and then cooling water is added to the water channel pre-set in the mold to quickly cool the polystyrene melt in the mold to achieve shaping. This means that after the injection molding machine injects the polystyrene melt into the mold, it is necessary to wait until the polystyrene melt in the mold is solidified and taken out of the mold before injecting new polystyrene melt into the mold again. This working method is likely to affect the efficiency of the injection molding operation of the filter press plate. The above patent can prove the existing defects.

[0004] Therefore, we make improvements to this and propose a multi-station injection molding machine. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the processing efficiency is low due to the long cooling time. In order to achieve the above-mentioned purpose, the present invention provides a multi-station injection molding machine to improve the above-mentioned problem.

[0006] The specific application is as follows:

[0007] A multi-station injection molding machine comprises a molding machine, wherein four compression mechanisms are arranged in a circumferential array on the side of the molding machine, wherein the compression mechanism comprises a compression platform, wherein the compression platform is fixedly mounted on the side of the molding machine, wherein a limit block is fixedly mounted on the top of the compression platform, wherein a bottom plate is fixedly mounted on the middle of the compression platform, wherein a motor is fixedly mounted on the bottom of the molding machine, wherein an injection device is fixedly mounted on the top side of the molding machine, wherein a pair of electric cylinders are symmetrically mounted on the top of the compression platform, wherein a flow divider is fixedly mounted on the side of the top of the compression platform and connected to the injection device through a pipeline, wherein a traction mechanism is arranged on the outer side of the molding machine;

[0008] The traction mechanism includes a traction ring, and four middle molds are arranged in a circular array on the side of the traction ring. The top and bottom of the middle mold are respectively provided with an upper mold and a lower mold. The upper mold vertically slides and is clamped on the top of the inner cavity of the compression platform, and the lower mold vertically slides and is clamped on the top of the bottom plate. A connecting plate is fixedly installed in the middle of the traction ring, and a guide cylinder is fixedly connected to the top of the connecting plate. The upper mold and the lower mold are respectively fixedly connected to the output ends of the two electric cylinders.

[0009] As a preferred technical solution of the present application, the traction mechanism also includes a gear plate, which is fixedly connected to the output end of the motor, and the gear plate is rotatably clamped on the bottom of the connecting plate. An electromagnetic rod is vertically slidably installed in the middle of the inner cavity of the guide cylinder, and a docking block is fixedly connected to the bottom of the electromagnetic rod. The cross-section of the docking block is square, and a square groove matching the docking block is opened in the middle of the gear plate.

[0010] As the preferred technical solution of the present application, a pair of telescopic rods are vertically slidably installed on the top of the upper mold and the bottom of the lower mold, the inner ends of the telescopic rods are fixedly connected with top blocks, the top blocks are affixed to the inner cavity surfaces of the upper mold and the lower mold, the outer ends of the two telescopic rods are fixedly connected with connecting plates, the middle part of the telescopic rods is sleeved with a support spring, and the two ends of the support spring are respectively fixedly connected to the bottom of the connecting plate and the outer surfaces of the upper mold and the lower mold.

[0011] As the preferred technical solution of the present application, the upper mold and the lower mold are respectively docked at the top and bottom of the middle mold, the upper mold and the lower mold are sealed at the top and bottom of the middle mold, and the support spring supports the top block outward so that the top block seals the inner surface of the upper mold and the lower mold.

[0012] As a preferred technical solution of the present application, a rotary cutting mechanism is rotatably installed in the middle part of the inner cavity of the middle mold, and the rotary cutting mechanism includes a rotating ring, which is rotatably installed inside the middle mold. A pair of connecting holes are symmetrically opened on the surface of the middle mold, and a pair of connecting holes are correspondingly opened on the surface of the rotating ring.

[0013] As a preferred technical solution of the present application, a pair of cutting rings are movably hinged on the inner side of the rotating ring, the two cutting rings are symmetrically arranged, a cutting opening is opened at the movable end of the cutting ring, and the rotating ring is an electromagnet.

[0014] As a preferred technical solution of the present application, a docking groove is provided on the inner side of the middle mold, the gear plate is rotatably engaged in the inside of the docking groove, and the teeth on the rotating ring and the gear plate are meshed with each other.

[0015] As a preferred technical solution of the present application, an injection and pressure pipe is fixedly installed in the middle of the traction ring, both ends of the injection and pressure pipe are connected to the connecting holes on both sides of the middle mold, and the diverter is connected to the injection and pressure pipe through a hose.

[0016] As the preferred technical solution of the present application, the four compression mechanisms work independently without interfering with each other. Two adjacent compression mechanisms form a group, namely the injection station and the cooling station. The two cooperate with each other, and the cutting ring can be rotated and unfolded inside the rotating ring.

[0017] As a preferred technical solution of the present application, a liftable support plate is slidably mounted on the bottom of the compression platform, and the support plate extends outward and is located between two adjacent compression platforms to receive the fallen processed workpiece.

[0018] Beneficial effects of the present invention:

[0019] In the scheme of this application:

[0020] 1. In order to solve the problem of low processing efficiency due to long cooling time, the present application adopts a multi-station injection molding machine, which uses four or more mold stations, first injects and then compresses. After the outer surface of the product is finalized, the workpiece in the mold of the molding station is moved to the cooling station and then the external pressure is continued to be applied to the product in the mold cavity to maintain the cavity pressure change caused by the shrinkage of the product. The first set of molds is molded and compressed at the central station and then moved out to the molding cooling station to apply mold clamping pressure to ensure that the mold cavity can maintain the volume change of the injection molded product with cooling and shrinkage, and the product can be continuously pressured to ensure the consistency of the appearance after shrinkage, and continue to cool until the injection molded product is completely finalized, and the previous station continues to perform compression work, thereby improving the processing efficiency;

[0021] 2. In order to solve the problem that the workpiece needs to be manually moved when it is moved to the cooling station, the present application sets a traction mechanism. When the motor drives the traction ring to rotate, the workpiece clamped in the middle mold can be directly moved to the next cooling station, and the molds can be merged. At this time, the die-casting of the workpiece can continue in the previous mold to inject the molten plastic into it. At the same time, the workpiece to be cooled is placed in the cooling station for cooling, thereby realizing the automatic movement of the workpiece to be cooled, thereby reducing the waste of manpower;

[0022] 3. Through the coordinated use of the traction mechanism and the peeling mechanism, when the traction mechanism completes the movement of the workpiece and moves the workpiece to the position to be cooled and the cooling is completed, the motor drives the gear plate to rotate so that the gear plate drives the rotating ring to rotate, and then the rotating ring can pull the cutting ring to rotate and cut the protruding part of the side of the workpiece. At this time, the upper mold and the lower mold will clamp the top and bottom of the workpiece to prevent the workpiece from rotating, and the redundant part of the workpiece surface can be cut, which solves the problem of secondary processing of the workpiece after the die-casting is completed;

[0023] 4. Through the coordination of the traction mechanism and the peeling mechanism, after the workpiece is processed and unloaded, the rotating ring is energized and magnetized so that the rotating ring has the same magnetism as the cutting ring. At this time, both cutting rings will rotate toward the middle and then cooperate with the motor to drive the gear plate to rotate and then pull the rotating ring to rotate, so that the rotating ring pulls the cutting ring to rotate and accelerates the flow rate of the surrounding air, thereby accelerating the air flow rate around the upper mold, the lower mold and the middle mold, and then quickly cooling it, thereby achieving cooling of the mold and solving the problem that the temperature of the mold cannot be quickly reduced after long-term work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of the multi-station injection molding machine provided in this application;

[0025] Figure 2 A schematic diagram of the partial structure of the traction mechanism of the multi-station injection molding machine provided in this application;

[0026] Figure 3 A schematic diagram of the traction mechanism structure of the multi-station injection molding machine provided in this application;

[0027] Figure 4 A cross-sectional view of the traction mechanism of the multi-station injection molding machine provided in this application;

[0028] Figure 5 A schematic diagram of the exploded structure of the traction mechanism of the multi-station injection molding machine provided in this application;

[0029] Figure 6 A schematic diagram of the mold decomposition structure of the multi-station injection molding machine provided in this application;

[0030] Figure 7 A schematic diagram of the rotary cutting mechanism structure of the multi-station injection molding machine provided in this application;

[0031] Figure 8 This is a schematic diagram of the expanded structure of the rotary cutting mechanism of the multi-station injection molding machine provided in this application.

[0032] Indicated in the figure:

[0033] 1. Molding machine; 101. Motor; 102. Injection device; 103. Limit block; 104. Bottom plate;

[0034] 2. Compression mechanism; 201. Compression platform; 202. Support plate; 203. Electric cylinder; 204. Diverter;

[0035] 3. Traction mechanism; 301. Traction ring; 302. Guide cylinder; 303. Connecting plate; 304. Electromagnetic rod; 305. Docking block; 306. Gear plate; 307. Upper mold; 308. Lower mold; 309. Middle mold; 310. Connecting plate; 311. Telescopic rod; 312. Top block; 313. Support spring; 314. Injection and pressure pipe;

[0036] 4. Peeling mechanism; 401. Rotating ring; 402. Cutting ring; 403. Cutting opening; 404. Docking groove; 405. Connecting hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0038] As described in the background art, the processing efficiency is low due to the long cooling time.

[0039] In order to solve this technical problem, the present invention provides a multi-station injection molding machine, which is applied to die casting.

[0040] Specifically, please refer to Figure 1-8 The multi-station injection molding machine specifically includes a molding machine 1, and four compression mechanisms 2 are arranged in a circular array on the side of the molding machine 1. The compression mechanism 2 includes a compression platform 201, and the compression platform 201 is fixedly installed on the side of the molding machine 1. A limit block 103 is fixedly installed on the top of the compression platform 201, and a bottom plate 104 is fixedly installed in the middle of the compression platform 201. A motor 101 is fixedly installed on the bottom of the molding machine 1, and an injection device 102 is fixedly installed on the top side of the molding machine 1. A pair of electric cylinders 203 are symmetrically installed on the top of the compression platform 201, and a diverter 204 is fixedly installed on the side of the top of the compression platform 201 and connected to the injection device 102 through a pipeline. A traction mechanism 3 is arranged on the outside of the molding machine 1;

[0041] The traction mechanism 3 includes a traction ring 301, and a side circumferential array of the traction ring 301 is provided with four middle molds 309, and the top and bottom of the middle mold 309 are respectively provided with an upper mold 307 and a lower mold 308, the upper mold 307 is vertically slidably clamped on the top of the inner cavity of the compression platform 201, and the lower mold 308 is vertically slidably clamped on the top of the bottom plate 104, and a connecting plate 303 is fixedly installed in the middle of the traction ring 301, and a guide cylinder 302 is fixedly connected to the top of the connecting plate 303, and a gear plate 306 is fixedly connected to the output end of the motor 101, and the upper mold 307 and the lower mold 308 are respectively fixedly connected to the output ends of the two electric cylinders 203. An injection and pressure pipe 314 is fixedly installed in the middle of the traction ring 301, and the two ends of the injection and pressure pipe 314 are connected to the connection holes 405 on both sides of the middle mold 309. The diverter 204 is connected to the injection and pressure pipe 314 through a hose. The four compression mechanisms 2 work separately without interfering with each other. Two adjacent ones of the four compression mechanisms 2 form a group, which are an injection and pressure station and a cooling station respectively. The two cooperate with each other. The cutting ring 402 can be rotated and unfolded inside the rotating ring 401. A liftable support plate 202 is slidably installed at the bottom of the compression platform 201. The support plate 202 extends outward and is located between two adjacent compression platforms 201 to receive the fallen workpieces.

[0042] Two adjacent ones of the four compression mechanisms 2 are respectively a molding station and a cooling station. First, the molten plastic in the molding station is filled and waited for molding. After molding, the traction ring 301 is driven by the motor 101 to rotate and send the middle mold 309 with the workpiece to the cooling station, and the lower mold 308 and the upper mold 307 clamp the workpiece to quickly cool it down. After the cooling work is completed, the middle mold 309 removes the workpiece and the mold in the molding station is loaded again. This cycle is repeated to improve the processing efficiency of the equipment.

[0043] The multi-station injection molding machine provided by the present invention solves the problem of low processing efficiency caused by long cooling time. The multi-station injection molding machine provided by the present application adopts four or more mold stations, which are first injected and then compressed. After the outer surface of the product is shaped and there is no glue overflow, the workpiece in the mold of the molding station is moved to the cooling station and then the external pressure is continued to be applied to the product in the mold cavity to maintain the cavity pressure change caused by product shrinkage. After the first set of molds is molded, compressed and moved out at the central station, it arrives at the molding cooling station and then the mold closing pressure is applied to ensure that the mold cavity can maintain the volume change of the injection molded product as it cools and shrinks, and continuous pressure is applied to the product to ensure the consistency of the appearance after shrinkage, and continues to cool until the injection molded product is completely shaped, and the previous station continues to perform compression work, thereby improving the processing efficiency.

[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] Example 1, please refer to Figure 2-Figure 6 A multi-station injection molding machine, wherein the traction mechanism 3 further comprises a gear plate 306, which is rotatably connected to the bottom of the connecting plate 303, and a through electromagnetic rod 304 is vertically slidably installed in the middle of the inner cavity of the guide cylinder 302, and a docking block 305 is fixedly connected to the bottom of the through electromagnetic rod 304, and the cross section of the docking block 305 is square, and a square groove adapted to the docking block 305 is opened in the middle of the gear plate 306, and the top of the upper mold 307 and the lower mold 307 are connected to each other. A pair of telescopic rods 311 are vertically slidably installed at the bottom of each mold 08, and the inner ends of the telescopic rods 311 are fixedly connected with a top block 312, and the top block 312 is attached to the inner cavity surface of the upper mold 307 and the lower mold 308. The outer ends of the two telescopic rods 311 are fixedly connected with a connecting plate 310, and the middle part of the telescopic rods 311 is sleeved with a support spring 313, and the two ends of the support spring 313 are respectively fixedly connected to the bottom of the connecting plate 310 and the outer surface of the upper mold 307 and the lower mold 308. The upper mold 307 and the lower mold 308 are respectively docked at the top and bottom of the middle mold 309, and the upper mold 307 and the lower mold 308 are sealed at the top and bottom of the middle mold 309. The support spring 313 supports the top block 312 outward so that the top block 312 seals the inner surface of the upper mold 307 and the lower mold 308. When the electromagnetic rod 304 is energized and magnetically conductive, the electromagnetic rod 304 will move upward with the docking block 305 and adsorb to the guide cylinder 302. The top of the inner cavity is formed, and the docking block 305 is separated from the middle of the gear plate 306. At this time, the middle mold 309 in the molding station is restricted by the clamping of the upper mold 307 and the lower mold 308, and the gear plate 306 can rotate relative to the connecting plate 303. When the electromagnetic rod 304 is powered off, the docking block 305 and the electromagnetic rod 304 will automatically fall down to make the docking block 305 engage with the middle of the gear plate 306, and the gear plate 306 and the connecting plate 303 can rotate synchronously.

[0048] After the plastic is injected into the mold in the molding station, it will inevitably adhere to the inner walls of the upper mold 307 and the lower mold 308 due to the effect of negative pressure during the molding process. At this time, when the two upper molds 307 and the lower mold 308 are separated by the electric cylinder 203, the connecting plate 310 contacts the top limit block 103 and the bottom base plate 104, so that the telescopic rod 311 extends toward the middle, and then the top block 312 pushes the workpiece inside the upper mold 307 and the lower mold 308 toward the middle, so that the workpiece is smoothly separated from the upper mold 307 and the lower mold 308 and is located in the middle of the middle mold 309.

[0049] In order to solve the problem that the current workpiece needs to be manually moved when it is moved to the cooling station, the present application sets up a traction mechanism 3, and when the motor 101 drives the traction ring 301 to rotate, the workpiece clamped in the middle mold 309 can be directly moved to the next cooling station, and the molds can be merged. At this time, the die-casting of the workpiece can continue in the previous mold to inject the molten plastic into it. At the same time, the workpiece to be cooled is placed in the cooling station for cooling, thereby realizing automatic movement of the workpiece to be cooled and reducing waste of manpower.

[0050] Embodiment 2, the multi-station injection molding machine provided in embodiment 1 is further optimized, specifically, as follows Figure 2-Figure 8As shown, the traction mechanism 3 also includes a gear plate 306, which is rotatably connected to the bottom of the connecting plate 303. A through electromagnetic rod 304 is vertically slidably installed in the middle of the inner cavity of the guide cylinder 302. A docking block 305 is fixedly connected to the bottom of the through electromagnetic rod 304. The cross section of the docking block 305 is square. A square groove adapted to the docking block 305 is opened in the middle of the gear plate 306. A pair of extension rods are vertically slidably installed on the top of the upper mold 307 and the bottom of the lower mold 308. The inner end of the telescopic rod 311 is fixedly connected with a top block 312, and the top block 312 is attached to the inner cavity surface of the upper mold 307 and the lower mold 308. The outer ends of the two telescopic rods 311 are fixedly connected with a connecting plate 310. The middle part of the telescopic rod 311 is sleeved with a supporting spring 313. The two ends of the supporting spring 313 are respectively fixedly connected to the bottom of the connecting plate 310 and the outer surface of the upper mold 307 and the lower mold 308. The upper mold 307 and the lower mold 308 are respectively docked in the middle mold The top and bottom of the middle mold 309 are sealed to the top and bottom of the middle mold 309. The support spring 313 supports the top block 312 outward so that the top block 312 seals the inner surface of the upper mold 307 and the lower mold 308. The middle part of the inner cavity of the middle mold 309 is rotatably installed with a rotary cutting mechanism 4. The rotary cutting mechanism 4 includes a rotating ring 401. The rotating ring 401 is rotatably installed inside the middle mold 309. The surface of the middle mold 309 is symmetrically opened with a pair of A pair of connecting holes 405 are correspondingly provided on the surface of the rotating ring 401. A pair of cutting rings 402 are movably hinged on the inner side of the rotating ring 401. The two cutting rings 402 are symmetrically arranged. A cutting opening 403 is provided on the movable end of the cutting ring 402. The rotating ring 401 is an electromagnet. A docking groove 404 is provided on the inner side of the middle mold 309. The gear plate 306 is rotatably clamped in the inner side of the docking groove 404. The teeth on the rotating ring 401 and the gear plate 306 are meshed with each other.

[0051] After the middle mold 309 moves the workpiece between two adjacent stations, the middle mold 309 can continue to move the workpiece to the next cooling station for cooling. After cooling, the gear plate 306 is driven to rotate by the motor 101, so that the gear plate 306 pulls the rotating ring 401 to rotate synchronously. At this time, the upper mold 307 and the lower mold 308 clamp the workpiece, and the cutting ring 402 cuts the side of the workpiece. After the cutting work is completed, the workpiece is moved again between two adjacent stations. At this time, the rotating ring 401 is powered off and demagnetized, and the cutting ring 402 is adsorbed on the surface of the rotating ring 401. The workpiece loses the clamping force and will automatically fall down, thereby realizing unloading. After the workpiece is cooled down, the melted plastic is continuously injected into the mold in the molding station, and the cycle is repeated. Long-term processing will increase the temperature of the upper mold 307, the lower mold 308 and the middle mold 309, thereby affecting the molding of the workpiece. At this time, the mold needs to be cooled down. Natural cooling takes time. By energizing the rotating ring 401, the rotating ring 401 will cause the two relative cutting rings 402 to rotate toward the middle at the same time, thereby expanding the cutting ring 402, and then cooperate with the motor 101 to drive the rotating ring 401 to rotate, so that the cutting ring 402 accelerates the surrounding air flow, thereby accelerating the cooling speed of the upper mold 307, the lower mold 308 and the middle mold 309.

[0052] By using the traction mechanism 3 and the peeling mechanism 4 in cooperation, when the traction mechanism 3 completes the movement of the workpiece and moves the workpiece to the position to be cooled and the cooling is completed, the motor 101 drives the gear plate 306 to rotate so that the gear plate 306 drives the rotating ring 401 to rotate, and then the rotating ring 401 can pull the cutting ring 402 to rotate and cut the protruding part of the side of the workpiece. At this time, the upper mold 307 and the lower mold 308 will clamp the top and bottom of the workpiece to prevent the workpiece from rotating, thereby realizing the cutting of the redundant part of the workpiece surface, solving the problem of the need for secondary processing of the workpiece after the die-casting of the workpiece is completed. After the workpiece is processed and unloaded, the rotating ring 401 is energized and magnetized so that the rotating ring 401 has the same magnetism as the cutting ring 402. At this time, the two cutting rings 402 will rotate toward the middle and then cooperate with the motor 101 to drive the gear plate 306 to rotate and then pull the rotating ring 401 to rotate, so that the rotating ring 401 pulls the cutting ring 402 to rotate and accelerate the flow speed of the surrounding air, thereby accelerating the air flow rate around the upper mold 307, the lower mold 308 and the middle mold 309, and then quickly cooling them, thereby achieving cooling of the mold and solving the problem that the temperature of the mold cannot be quickly reduced after a long period of work.

[0053] The use process of the multi-station injection molding machine provided by the present invention is as follows:

[0054] After the plastic is injected into the mold in the molding station, it will inevitably adhere to the inner walls of the upper mold 307 and the lower mold 308 due to the effect of negative pressure during the molding process. At this time, when the two upper molds 307 and the lower mold 308 are separated by the electric cylinder 203, the connecting plate 310 contacts the top limit block 103 and the bottom base plate 104, so that the telescopic rod 311 extends to the middle, and then the top block 312 pushes the workpiece inside the upper mold 307 and the lower mold 308 to the middle, so that the workpiece is smoothly separated from the upper mold 307 and the lower mold 308 and is located in the middle of the middle mold 309. After the middle mold 309 moves the workpiece between the two adjacent stations, the middle mold 309 can continue to move the workpiece to the next cooling station for cooling. After the cooling is completed, the gear plate 306 is driven to rotate by the motor 101, so that the gear plate 306 pulls the rotating ring 401 to rotate synchronously. At this time, the upper mold 307 and the lower mold 308 clamp the workpiece, cutting Ring 402 cuts the side of the workpiece. After the cutting work is completed, the workpiece is moved again between two adjacent stations. At this time, the rotating ring 401 is powered off and demagnetized, and the cutting ring 402 is adsorbed on the surface of the rotating ring 401. The workpiece loses the clamping force and will automatically fall, thereby realizing material unloading. After the workpiece is cooled down, the melted plastic continues to be injected into the mold in the molding station. This cycle is repeated. Long-term processing will increase the temperature of the upper mold 307, the lower mold 308 and the middle mold 309, thereby affecting the molding of the workpiece. At this time, the mold needs to be cooled down. Natural cooling delays time. By energizing the rotating ring 401, the rotating ring 401 will cause the two relative cutting rings 402 to rotate toward the middle at the same time, thereby expanding the cutting ring 402, and then cooperate with the motor 101 to drive the rotating ring 401 to rotate, so that the cutting ring 402 accelerates the surrounding air flow, thereby accelerating the cooling speed of the upper mold 307, the lower mold 308 and the middle mold 309.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A multi-station injection molding machine, characterized in that: The invention comprises a molding machine (1), wherein four compression mechanisms (2) are arranged in a circular array on the side of the molding machine (1), wherein the compression mechanism (2) comprises a compression platform (201), wherein the compression platform (201) is fixedly mounted on the side of the molding machine (1), wherein a limit block (103) is fixedly mounted on the top of the compression platform (201), wherein a bottom plate (104) is fixedly mounted in the middle of the compression platform (201), wherein a motor (101) is fixedly mounted on the bottom of the molding machine (1), wherein an injection device (102) is fixedly mounted on the top side of the molding machine (1), wherein a pair of electric cylinders (203) are symmetrically mounted on the top of the compression platform (201), wherein a flow divider (204) is fixedly mounted on the top side of the compression platform (201) and connected to the injection device (102) via a pipeline, and wherein a traction mechanism (3) is arranged on the outside of the molding machine (1); The traction mechanism (3) comprises a traction ring (301), and the side circumferential array of the traction ring (301) is provided with four middle molds (309), and the top and bottom of the middle mold (309) are respectively provided with an upper mold (307) and a lower mold (308), and the upper mold (307) is vertically slidably clamped on the top of the inner cavity of the compression platform (201), and the lower mold (308) is vertically slidably clamped on the top of the bottom plate (104), and a connecting plate (303) is fixedly installed in the middle of the traction ring (301), and the top of the connecting plate (303) is fixedly connected to a guide cylinder (302), and the upper mold (307) and the lower mold (308) are respectively fixedly connected to the output ends of two electric cylinders (203).

2. A multi-station injection molding machine according to claim 1, characterized in that: The traction mechanism (3) further comprises a gear plate (306), wherein the gear plate (306) is fixedly connected to the output end of the motor (101), and the gear plate (306) is rotatably clamped on the bottom of the connecting plate (303). An electromagnetic rod (304) is vertically slidably installed in the middle of the inner cavity of the guide cylinder (302), and a docking block (305) is fixedly connected to the bottom of the electromagnetic rod (304). The cross section of the docking block (305) is square, and a square groove matching the docking block (305) is opened in the middle of the gear plate (306).

3. A multi-station injection molding machine according to claim 2, characterized in that: A pair of telescopic rods (311) are vertically slidably installed at the top of the upper mold (307) and the bottom of the lower mold (308), the inner ends of the telescopic rods (311) are fixedly connected with a top block (312), and the top block (312) is attached to the inner cavity surface of the upper mold (307) and the lower mold (308), the outer ends of the two telescopic rods (311) are fixedly connected with a connecting plate (310), and the middle part of the telescopic rods (311) is sleeved with a support spring (313), and the two ends of the support spring (313) are respectively fixedly connected to the bottom of the connecting plate (310) and the outer surface of the upper mold (307) and the lower mold (308).

4. A multi-station injection molding machine according to claim 3, characterized in that: The upper mold (307) and the lower mold (308) are respectively connected to the top and bottom of the middle mold (309), and the upper mold (307) and the lower mold (308) are sealed to the top and bottom of the middle mold (309), and the support spring (313) supports the top block (312) outward.

5. A multi-station injection molding machine according to claim 4, characterized in that: A rotary cutting mechanism (4) is rotatably installed in the middle of the inner cavity of the middle mold (309), and the rotary cutting mechanism (4) includes a rotating ring (401). The rotating ring (401) is rotatably installed inside the middle mold (309). A pair of connecting holes (405) are symmetrically opened on the surface of the middle mold (309), and a pair of connecting holes (405) are correspondingly opened on the surface of the rotating ring (401).

6. A multi-station injection molding machine according to claim 5, characterized in that: A pair of cutting rings (402) are movably hinged on the inner side of the rotating ring (401), the two cutting rings (402) are symmetrically arranged, and a cutting opening (403) is opened at the movable end of the cutting ring (402), and the rotating ring (401) is an electromagnet.

7. The multi-station injection molding machine according to claim 5, characterized in that: A docking groove (404) is provided on the inner side of the middle mold (309), and the gear plate (306) is rotatably engaged in the interior of the docking groove (404), and the teeth on the rotating ring (401) and the gear plate (306) are meshed with each other.

8. The multi-station injection molding machine according to claim 1, characterized in that: An injection and pressure pipe (314) is fixedly installed in the middle of the traction ring (301), and both ends of the injection and pressure pipe (314) are connected to the connection holes (405) on both sides of the middle mold (309), and the diverter (204) is connected to the injection and pressure pipe (314) through a hose.

9. The multi-station injection molding machine according to claim 6, characterized in that: The four compression mechanisms (2) work independently without interfering with each other. Two adjacent compression mechanisms (2) form a group, which are respectively an injection station and a cooling station. The two cooperate with each other, and the cutting ring (402) rotates and unfolds inside the rotating ring (401).

10. The multi-station injection molding machine according to claim 1, characterized in that: A liftable support plate (202) is slidably mounted on the bottom of the compression platform (201); the support plate (202) extends outward and is located between two adjacent compression platforms (201) to receive the fallen workpiece after processing.

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