A multi-station injection molding device for processing plastic products

Abstract

The application belongs to the technical field of plastic product injection molding, in particular to a multi-station injection molding device for plastic product processing, which comprises an injection molding base, a servo motor is fixedly connected to the injection molding base, a supporting column is fixedly connected to the servo motor, and a first fixing disc is fixedly connected to the top end of the supporting column, the servo motor is installed at the center of a working area, the output end of the servo motor drives the first, second and third fixing discs to rotate synchronously through the supporting column, the three fixing discs are connected by bolts to form a three-ring working area, and six stations are arranged, a plurality of molds are alternately circulated, injection molding, cooling and material taking are carried out in parallel, waiting time is reduced, batch production efficiency is improved, the work of each station is clear, and quality stability is ensured, in addition, different models of molds can be installed on each fixing disc, a plurality of specifications of products can be produced in the same cycle, frequent shutdown and mold replacement are avoided, small-batch and multi-specification production requirements and large-batch and single-specification production requirements are considered, and the device is suitable for flexible production.

Description

Technical Field

[0001] This invention belongs to the field of plastic product injection molding technology, specifically a multi-station injection molding device for processing plastic products. Background Technology

[0002] Plastic products are lightweight, tough, and corrosion-resistant, and can be molded into many shapes at low cost, ranging from disposable packaging bags and medical infusion tubes to car dashboards and spacecraft parts. Plastic products are solid items with shapes and functions made from synthetic or natural resins as the base material through processes such as heating and melting, pressure molding, injection molding, blow molding, and extrusion.

[0003] Traditional plastic injection molding equipment consists of a hopper, a heating screw, a clamping unit, and a mold cavity. First, granular plastic raw materials are melted into a viscous fluid in a high-temperature cylinder. Then, with the help of the rotating screw, the molten material is injected at high speed into a closed mold under pressure. After it solidifies and sets under pressure and cooling, the mold is opened and the finished product is ejected.

[0004] In traditional plastic injection molding processes, a single-station operation is typically used. This means that during the injection molding process, the machine sequentially performs heating, injection, and cooling steps at one station, injecting molten plastic at high speed into a closed mold. After the plastic cools and solidifies in the mold, the finished product is ejected from the mold by an ejector pin. Then, the mold is closed again for the next injection and molding process. While this single-station sequential injection molding method can ensure the quality and consistency of each product, it is prone to inefficiency when facing mass production demands. Although the single-station plastic injection molding method is suitable for small-batch production, it is inadequate for the molding needs of large-volume plastic products.

[0005] Therefore, the present invention provides a multi-station injection molding apparatus for processing plastic products. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: A multi-station injection molding device for processing plastic products according to the present invention includes an injection molding machine base; a servo motor is fixedly connected to the injection molding machine base; a support column is fixedly connected to the servo motor, and a first fixed plate is fixedly connected to the top of the support column; a second fixed plate is fixedly connected to the outside of the first fixed plate; a third fixed plate is fixedly connected to the outside of the second fixed plate, and the diameters of the first, second, and third fixed plates are arranged in ascending order; multiple first assembly seats are fixedly connected to the first, second, and third fixed plates; lower molds are snapped onto the multiple first assembly seats; an injection molding assembly is provided on the injection molding machine base, and the injection molding assembly is used to cooperate with the multiple lower molds to perform multi-station injection molding of plastic products.

[0008] Preferably, the injection assembly includes a material storage tank, hydraulic cylinders, an injection molding machine, a first telescopic cylinder, a second assembly base, and an upper mold; the material storage tank is fixedly connected to the injection molding machine base; two hydraulic cylinders are fixedly connected to the bottom end of the material storage tank; the injection molding machine is fixedly connected to the output end of the hydraulic cylinders; multiple first telescopic cylinders are fixedly connected between the material storage tank and the injection molding machine, and the material storage tank can be connected to the injection molding machine through multiple first telescopic cylinders; multiple second assembly bases are fixedly connected to the bottom end of the injection molding machine; multiple upper molds are respectively threaded to the bottom end of the second assembly base, and the upper molds correspond to the lower molds.

[0009] Preferably, a support frame is fixedly connected to one end of the injection molding machine; a heat-conducting plate is fixedly connected to the bottom end of the support frame; a first heat-conducting box is fixedly connected to one end of the heat-conducting plate, and a second heat-conducting box is fixedly connected to the other end of the heat-conducting plate; the heat-conducting plate, the first heat-conducting box, and the second heat-conducting box are all made of metal; a supplementary heating fan is fixedly connected inside the second heat-conducting box; an inclined frame is fixedly connected to the first heat-conducting box, and the inclined frame is located on the upper surface of the first heat-conducting box away from the heat-conducting plate; a first electric fan is fixedly connected to the inclined frame; an exhaust pipe is fixedly connected to the second heat-conducting box, and the exhaust pipe is located on the upper surface of the second heat-conducting box away from the heat-conducting plate; through holes are opened on the heat-conducting plate, the first heat-conducting box, and the second heat-conducting box, allowing the first heat-conducting box to communicate with the second heat-conducting box through the heat-conducting plate.

[0010] Preferably, a No. 1 metal foam board is fixedly connected to the upper part of the interior of the No. 1 heat conduction box; the interior of the No. 1 metal foam board has multiple No. 1 slots; a No. 2 metal foam board is fixedly connected to the center of the interior of the No. 1 heat conduction box; the interior of the No. 2 metal foam board has a No. 2 slot; and industrial paraffin wax is placed in both the No. 1 slot and the No. 2 slot.

[0011] Preferably, the interior of the first heat-conducting box is rotatably connected to a rotating rod via a torsion spring at one end near the heat-conducting plate; a baffle plate is fixedly attached to the rotating rod; a first magnetic block is fixedly attached to the rotating rod; a second magnetic block is fixedly attached to the interior of the first heat-conducting box near the rotating rod, and the first magnetic block can magnetically attract the second magnetic block.

[0012] Preferably, the inner wall of the second heat-conducting box has two slide rails fixedly connected to it, and the two slide rails are arranged opposite to each other; a first electric slider is slidably connected to the slide rails; a wind box is fixedly connected between the two first electric sliders; two second electric fans are fixedly connected to the wind box; a blower plate is fixedly connected to one side of the wind box at an angle, and the output end of the second electric fan can be connected to the blower plate through the wind box; a collection box is fixedly connected to the end of the second heat-conducting box away from the heat-conducting plate; a through groove is opened between the collection box and the second heat-conducting box; a storage box is slidably connected to the collection box.

[0013] Preferably, a storage tank is fixedly connected to the second heat conduction box; a pump is fixedly connected to one side of the storage tank; a delivery pipe is fixedly connected to the output end of the pump, and the end of the delivery pipe away from the pump is located inside the second heat conduction box; a winding rod is rotatably connected to the inside of the second heat conduction box via a second torsion spring; an extension pipe is fixedly connected to one end of the pump, and the extension pipe is wound around the winding rod; a nozzle is fixedly connected to the bottom end of the air box, and the output end of the pump can be connected to the nozzle through the delivery pipe and the extension pipe.

[0014] Preferably, a second electric slider is slidably connected to the inner wall of the second heat conduction box, and the second electric slider is located near the conveying pipe; a soaking box is fixedly connected to the second electric slider, and the soaking box is slidably connected to the inner wall of the second heat conduction box, and a soaking tank is provided at one end of the soaking box.

[0015] Preferably, two air ducts are fixedly connected to one side of the air box; two air slots are opened on the soaking box, and the air ducts are located above the air slots; a connecting plate is fixedly connected to the soaking tank of the soaking box, and the connecting plate can communicate with the air slots; multiple aerators are fixedly connected to the connecting plate.

[0016] Preferably, a support ring plate is fixedly connected to the support column, and the support ring plate is located below the third fixing plate; a water cooler is fixedly connected to the support ring plate; the bottom ends of multiple first assembly seats are fixedly connected to connecting ring plates through short pipes, and three connecting ring plates are provided, with the inlet and outlet pipes of the three connecting ring plates connected to the water cooler.

[0017] The beneficial effects of this invention are as follows: 1. The multi-station injection molding device for processing plastic products according to the present invention is equipped with a servo motor installed in the center of the working area. Its output end drives the first, second, and third fixed plates to rotate synchronously through the support column. The three plates are bolted together to form a three-ring working area with six stations: mold closing injection, waste heat recovery, two mold opening cooling stages, material unloading, and preheating spraying. Multiple No. 1 assembly seats are fixed side by side on each fixed plate for clamping the lower mold. During rotation, the molds under each plate are synchronously changed position. The injection molding assembly closes and injects a row of molds at the mold closing station. After mold opening, the product sequentially undergoes waste heat recovery and two-stage cooling before being unloaded at the material unloading station, realizing one-time processing. Multiple parts are molded; then the empty mold is transferred to the preheating and spraying station, and after preheating and mold release agent spraying, it enters the mold closing station again, forming a cycle; multiple rows of molds alternately flow, so that injection, cooling and material unloading can be carried out in parallel, reducing waiting time and improving batch production efficiency. At the same time, the division of labor of each station is clear, ensuring stable quality; in addition, different types of molds can be installed on each fixed plate (such as type A on plate 1, type B on plate 2, and type C on plate 3). With the adjustment of the injection molding components, multiple specifications of products can be produced simultaneously in the same cycle, avoiding frequent downtime for mold changing, taking into account the needs of small batch variety and large batch single production, and adapting to flexible production.

[0018] 2. The multi-station injection molding device for processing plastic products according to the present invention uses a pump to deliver mold release agent from a storage tank to an extension tube via a delivery pipe. The extension tube is wound around a take-up rod and connected to a nozzle at the bottom of a blower box. When the blower box drives the nozzle to slide, the extension tube is pulled out, and the take-up rod rotates, causing the second torsion spring to be stressed synchronously. The mold release agent is then sprayed from the nozzle onto the surface of the mold. The mold cleaning is completed simultaneously with the mold release agent spraying, without the need for an additional power structure. The cleaning action enables two operations to be performed in one process, ensuring that the mold release agent evenly covers the cavity. The spraying range is automatically controlled according to the sliding stroke, reducing waste and ensuring smooth demolding of the product, reducing the risk of sticking and scrapping, and meeting the cycle time requirements of multi-station cyclic production. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the water cooler in this invention; Figure 3 This is a schematic diagram of the structure of the No. 1 assembly base in this invention; Figure 4 This is a schematic diagram of the structure of the No. 2 assembly base in this invention; Figure 5 This is a schematic diagram of the structure of the No. 1 electric fan in this invention; Figure 6 This is a schematic diagram of the soaking box in this invention; Figure 7 This is a schematic diagram of the aerator in this invention; Figure 8 This is a schematic diagram of the structure of the No. 2 electric fan in this invention; Figure 9 This is a schematic diagram of the structure of the blower plate in this invention; Figure 10 This is a schematic diagram of the structure of the air duct in this invention; Figure 11 This is a partial structural cross-sectional view of the No. 1 heat conduction box in this invention.

[0021] In the diagram: 1. Injection molding machine base; 11. Servo motor; 12. Fixed platen 1; 13. Fixed platen 2; 14. Fixed platen 3; 15. Assembly base 1; 16. Lower mold; 2. Material storage bin; 21. Hydraulic cylinder; 22. Injection molding machine; 23. Telescopic cylinder 1; 24. Assembly base 2; 25. Upper mold; 3. Support frame; 31. Heat-conducting plate; 32. Heat-conducting box 1; 33. Heat-conducting box 2; 4. Tilting frame; 41. Electric fan 1; 42. Exhaust pipe; 43. Heat replenishing fan; 44. Metal foam board 1; 45. Hole slot 1; 46. Metal foam board 2 47. Foam plate; 48. No. 2 slot; 49. Industrial paraffin wax; 40. Rotating rod; 41. Baffle plate; 492. No. 1 magnetic block; 493. No. 2 magnetic block; 5. Slide rail; 51. No. 1 electric slider; 52. Air box; 53. No. 2 electric fan; 54. Blowing plate; 6. Collection box; 61. Storage box; 7. Storage tank; 71. Pump; 72. Delivery pipe; 73. Extension pipe; 74. Nozzle; 8. No. 2 electric slider; 81. Immersion box; 9. Air duct; 91. Air channel; 92. Connecting plate; 93. Aerator; 94. Support ring plate; 95. Water cooler; 96. Connecting ring plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 4As shown in the embodiment of the present invention, a multi-station injection molding device for processing plastic products includes an injection molding machine base 1; a servo motor 11 is fixedly connected to the injection molding machine base 1; a support column is fixedly connected to the servo motor 11, and a first fixed plate 12 is fixedly connected to the top of the support column; a second fixed plate 13 is fixedly connected to the outside of the first fixed plate 12; a third fixed plate 14 is fixedly connected to the outside of the second fixed plate 13, and the diameters of the first fixed plate 12, the second fixed plate 13, and the third fixed plate 14 are arranged in ascending order; multiple first assembly seats 15 are fixedly connected to each of the first fixed plate 12, the second fixed plate 13, and the third fixed plate 14; lower molds 16 are snapped onto the multiple first assembly seats 15; and an injection molding assembly is provided on the injection molding machine base 1, which is used to cooperate with the multiple lower molds 16 to perform multi-station injection molding of plastic products.In the injection molding of large quantities of plastic products, the injection molding machine base 1 serves as the foundation of the injection molding device. A servo motor 11 is installed at the center of the working area on the injection molding machine base 1. Support columns located at the output end of the servo motor 11 support three fixed plates: a first fixed plate 12, a second fixed plate 13, and a third fixed plate 14. These three fixed plates are connected by bolts to form a three-ring working area. The three-ring working area includes a mold closing injection station, a waste heat recovery station, two mold opening cooling stations, a material unloading station, and a... Each preheating spraying station has multiple No. 1 assembly seats 15 fixed to No. 1 fixed platen 12, No. 2 fixed platen 13, and No. 3 fixed platen 14, respectively. The multiple No. 1 assembly seats 15 in each station area are arranged side-by-side. Each lower mold 16 is fixedly connected to one of the No. 1 assembly seats 15. As the output of the servo motor 11 drives the support column to rotate, the multiple lower molds 16 on No. 1 fixed platen 12, No. 2 fixed platen 13, and No. 3 fixed platen 14 rotate synchronously. The injection molding assembly performs mold closing and injection molding on a row of lower molds 16 at the mold closing and injection molding station. After the injection molding assembly opens, the output of the servo motor 11 drives the first fixed platen 12, the second fixed platen 13, and the third fixed platen 14 to rotate again. The plastic products after mold opening sequentially pass through the waste heat recovery station, the two mold opening cooling stations, and are then unloaded at the material handling station. Multiple plastic products can be molded at once. Subsequently, multiple lower molds 16 rotate to the preheating and spraying station. By adding preheating and spraying components, these lower molds 16 are preheated and sprayed with release agent. Then, these lower molds 16 are sent back to the mold closing and injection molding station for injection molding of the plastic products. When... When the lower mold 16 after the mold closing injection station reaches the waste heat recovery station, the next lower mold 16 will simultaneously rotate to the mold closing injection station for processing, thereby realizing multi-station cyclic injection operation. This allows for simultaneous parallel processing of multiple processes such as injection, cooling, and material handling, eliminating the need to wait for each process to complete sequentially on a single machine. This reduces the processing waiting time for a single product, ensuring the injection molding efficiency of large-scale plastic products. At the same time, the clear division of labor among different stations also ensures the stable molding quality of each injection molded product, meeting the needs of large-scale plastic product production. Meanwhile, multiple No. 1 assembly seats 15 on the No. 1 fixed platen 12, No. 2 fixed platen 13, and No. 3 fixed platen 14 can assemble lower molds 16 of different models. For example, a type 1 lower mold 16 can be installed on the multiple No. 1 assembly seats 15 on the No. 1 fixed platen 12, a type 2 lower mold 16 can be installed on the multiple No. 1 assembly seats 15 on the No. 2 fixed platen 13, and a type 3 lower mold 16 can be installed on the multiple No. 1 assembly seats 15 on the No. 3 fixed platen 14. The injection molding assembly also needs to be matched, enabling batch multi-station injection molding of different models of plastic products. It is important to set an appropriate cycle time program. Compared to traditional single-station injection molding machines that can only produce the same product and require machine stoppage for disassembly and adjustment when changing molds of different specifications, this machine can simultaneously load multiple different types of molds. In one cycle of processing, it can complete the injection molding production of multiple plastic products of different specifications without repeated machine stoppages for mold changing and adjustment, ensuring the production adaptability of the equipment. It can meet the needs of small-batch production of different products and also ensure the efficiency of large-scale production of a single product, adapting to the flexible production needs of multiple varieties of plastic products.

[0024] The injection molding assembly includes a material storage tank 2, hydraulic cylinders 21, an injection molding machine 22, a first telescopic cylinder 23, a second assembly base 24, and an upper mold 25. The material storage tank 2 is fixedly connected to the injection molding machine base 1. Two hydraulic cylinders 21 are fixedly connected to the bottom end of the material storage tank 2. The injection molding machine 22 is fixedly connected to the output end of the hydraulic cylinders 21. Multiple first telescopic cylinders 23 are fixedly connected between the material storage tank 2 and the injection molding machine 22, and the material storage tank 2 can be connected to the injection molding machine 22 through multiple first telescopic cylinders 23. Multiple second assembly bases 24 are fixedly connected to the bottom end of the injection molding machine 22. Multiple upper molds 25 are respectively threaded to the bottom end of the second assembly base 24, and the upper molds 25 correspond to the lower molds 16. When injection molding large quantities of plastic products, the material storage tank 2 is fixed on the injection molding machine base 1 to store molten material, and the multiple upper molds... The upper mold 25 is installed at the bottom of multiple No. 2 assembly seats 24. The upper mold 25 and the lower mold 16 are set accordingly. The output ends of two hydraulic cylinders 21 drive the injection molding machine 22 to extend downward, so that the upper mold 25 presses against the lower mold 16. The molten material inside the storage box 2 is sent into the injection molding machine 22 through the No. 1 telescopic cylinder 23. The injection molding machine 22, together with the No. 2 assembly seat 24 and the upper mold 25, performs injection molding to complete the injection operation of the corresponding mold at the mold closing injection station. After the injection is completed, the hydraulic cylinder 21 drives the injection molding machine 22 to rise, so that the upper mold 25 and the lower mold 16 are separated, making room for rotation so that the device can drive the next station mold to the position. It can simultaneously complete the synchronous injection of multiple molds in a row, ensuring the injection of multiple stations. It can also be adapted to different mold models and the installation position can be adjusted accordingly to ensure the smoothness of the injection operation.

[0025] like Figure 1 , Figures 4 to 11As shown, a support frame 3 is fixedly connected to one end of the injection molding machine 22; a heat-conducting plate 31 is fixedly connected to the bottom end of the support frame 3; a first heat-conducting box 32 is fixedly connected to one end of the heat-conducting plate 31, and a second heat-conducting box 33 is fixedly connected to the other end of the heat-conducting plate 31. The heat-conducting plate 31, the first heat-conducting box 32, and the second heat-conducting box 33 are all made of metal; a heat recovery fan 43 is fixedly connected inside the second heat-conducting box 32; when recovering the residual heat of the freshly injection-molded plastic products, the heat-conducting plate 31 connected to the support frame 3 is supported between the first heat-conducting box 32 and the second heat-conducting box 33. The multiple freshly injection-molded plastic products and the mold carry heat, which is generated by the output end of the hydraulic cylinder 21 driving multiple upper molds. The first metal heat-conducting box 32, made of metal, presses against the previous set of plastic products and molds located at the waste heat recovery station to absorb heat. The heat is then conducted through the heat-conducting plate 31 to the second metal heat-conducting box 33. The second heat-conducting box 33 can preheat the mold pressed at the preheating spraying station below it. If the preheating temperature is insufficient, the supplementary heating fan 43 can be used to supplement the heat to achieve the preheating effect, realize the recycling of injection molding waste heat, reduce the energy consumption cost in the injection molding process, and at the same time keep the mold at a stable temperature, avoiding the plastic melt from cooling too quickly due to cold mold injection, which may cause molding defects and ensure the molding quality of injection molded products.

[0026] An inclined frame 4 is fixedly connected to the first heat conduction box 32, and the inclined frame 4 is located on the upper surface of the first heat conduction box 32 away from the heat conduction plate 31; a first electric fan 41 is fixedly connected to the inclined frame 4; an exhaust pipe 42 is fixedly connected to the second heat conduction box 33, and the exhaust pipe 42 is located on the upper surface of the second heat conduction box 33 away from the heat conduction plate 31. Through holes are provided on the heat conduction plate 31, the first heat conduction box 32, and the second heat conduction box 33, allowing the first heat conduction box 32 to connect with the second heat conduction box 33 through the heat conduction plate 31; when heat exchange and recovery are needed for plastic products and molds with residual heat, the inclined frame 4 is fixedly connected. A first electric fan 41 is supported on the first heat conduction box 32. When the first electric fan 41 is powered on, it rotates and draws air into the tilting frame 4. The air blows into the first heat conduction box 32, and the residual heat in the first heat conduction box 32 is sent to the second heat conduction box 33 through the through hole and the heat conduction plate 31 to preheat the mold in the second heat conduction box 33. If the preheating temperature is insufficient, the supplementary heating fan 43 is activated to supplement the heat, so as to ensure the preheating effect and the efficiency of residual heat transfer, avoid excessive heat loss during the conduction process, make the residual heat recovery and utilization effect more stable, and ensure the energy utilization rate and the heating efficiency of the mold in the preheating station.

[0027] A first metal foam board 44 is fixedly attached to the upper part of the interior of the first heat-conducting box 32; the interior of the first metal foam board 44 has multiple first-order slots 45; a second metal foam board 46 is fixedly attached to the center of the interior of the first heat-conducting box 32; the interior of the second metal foam board 46 has second-order slots 47; industrial paraffin wax 48 is placed in both the first-order slots 45 and the second-order slots 47; when heat exchange and recovery are performed on plastic products and molds with residual heat, the first metal foam board 44 and the second metal foam board 46 are respectively fixed to... Industrial paraffin wax 48 is installed in multiple slots 45 and 47, both inside the upper part and center of the No. 1 heat conduction box 32. The industrial paraffin wax 48 is a fully refined industrial paraffin wax with a melting point of 100℃-160℃, suitable for the injection molding heat range of 120℃-160℃. Its operating temperature is below 180℃, far below the 250℃ critical temperature for paraffin wax oxidation and decomposition. Alternatively, a different industrial paraffin wax 48 can be selected based on the operating temperature. During the heat storage stage, the plastic products and molds, carrying residual heat, conduct heat to the interior of the No. 1 heat conduction box 32. Both the No. 1 metal foam board 44 and the No. 2 metal foam board 46 work together with industrial paraffin wax 48 to absorb heat. The heat is rapidly conducted through the framework of the No. 1 metal foam board 44 and the No. 2 metal foam board 46 to the internal industrial paraffin wax 48. The industrial paraffin wax 48 absorbs the heat and melts, storing the peak residual heat of the mold as latent heat, preventing instantaneous dissipation. Simultaneously, the No. 2 metal foam board 46 and the industrial paraffin wax 48, in conjunction with a blower, rapidly conduct the heat to the intermediate heat-conducting plate 31, and then to the No. 2 heat-conducting box 33. Subsequently, the heat release phase begins when the mold leaves the residual heat storage area. When the external heat source disappears, the liquid industrial paraffin 48 slowly solidifies, continuously releasing the stored heat. This heat is then transported to the second heat-conducting box 33 via a blower and heat-conducting plate 31, ensuring stable heating within the second heat-conducting box 33. When a new round of waste heat from subsequent workstations enters the first heat-conducting box 32, the heat is again transferred to the industrial paraffin 48 for storage, thus achieving a continuous and stable heat storage and release cycle. This avoids significant fluctuations in heat supply during waste heat recovery and ensures the stability of the heating supply from the second heat-conducting box 33 to the mold 16 at the preheating workstation.

[0028] The interior of the first heat-conducting box 32, near the heat-conducting plate 31, is rotatably connected to a rotating rod 49 via a torsion spring. A baffle plate 491 is fixed to the rotating rod 49. A first magnetic block 492 is fixed to the rotating rod 49. A second magnetic block 493 is fixed to the interior of the first heat-conducting box 32 near the rotating rod 49, and the first magnetic block 492 can magnetically attract the second magnetic block 493. When the heat inside the first heat-conducting box 32 is too high and affects subsequent preheating, the first electric fan 41 activates reverse exhaust mode. The first electric fan 41 extracts the heat from the first heat-conducting box 32 and sends it out. The rotating rod 49, in conjunction with the baffle plate 491, partially blocks the connection between the first heat-conducting box 32 and the heat-conducting plate 31, reducing the heat transfer to the second heat-conducting box 33. The heat is dissipated by the first electric fan 41 extracting the heat from the first heat-conducting box 32. After the heat dissipation is completed, the first... The electric fan 41 continues to blow air in the forward direction. The air blows the baffle plate 491, which rotates with the rotating rod 49. The first torsion spring is stressed, and the first magnetic block 492 approaches the second magnetic block 493 for magnetic attraction. This keeps the baffle plate 491 open, reducing the obstruction of the airflow from the first electric fan 41 and ensuring the effective delivery of hot air into the second heat conduction box 33. If the first magnetic block 492 loses the continuous airflow from the first electric fan 41, the first torsion spring can pull the first magnetic block 492 away from the second magnetic block 493. The first torsion spring pulls the rotating rod 49 to rotate, causing the baffle plate 491 to reset and resume its function of blocking the connection between the first heat conduction box 32 and the heat conduction plate 31. This allows for flexible adjustment of the heat supply according to the actual temperature inside the first heat conduction box 32, preventing excessive heat from causing the preheating station mold temperature to exceed the standard and affecting the injection molding quality. It also ensures the stability and adaptability of residual heat utilization.

[0029] The inner wall of the second heat-conducting box 33 has two slide rails 5 fixedly connected, and the two slide rails 5 are arranged opposite each other; a first electric slider 51 is slidably connected to the slide rail 5; a bellows 52 is fixedly connected between the two first electric sliders 51; two second electric fans 53 are fixedly connected to the bellows 52; a blower plate 54 is fixedly connected to one side of the bellows 52 at an angle, and the output end of the second electric fan 53 can be connected to the blower plate 54 through the bellows 52; when the molded plastic product is removed from the material handling station, a small amount of residual material may remain on the mold. The two first electric sliders 51 slide on the two slide rails 5, synchronously driving the bellows 52 and the blower plate 54 at an angle to one side to slide, and the two second electric fans 53... When the electric fan 53 is powered on, it draws air into the air box 52, and then the air is blown out from the blower plate 54. As the two No. 1 electric sliders 51 slide, the blower plate 54 can tilt and blow away debris from the surfaces of the multiple lower molds 16 below, removing and cleaning the fine residue remaining on the mold surfaces. This reduces foreign matter on the surface of the mold before injection molding, avoids residual material from causing dents in the subsequently injection molded products, and ensures the quality of the finished injection molded products. The device performs impurity removal while preheating. Its internal structure is movable, reducing obstruction of local preheating. It can be reset after impurity removal. At the same time, automated impurity removal also saves the workload of manual maintenance and ensures the production efficiency of the device.

[0030] A collection box 6 is fixedly connected to one end of the second heat-conducting box 33 away from the heat-conducting plate 31; a through groove is provided between the collection box 6 and the second heat-conducting box 33; a storage box 61 is slidably connected to the collection box 6; when impurities on the mold are blown away, the collection box 6 is fixed to one end of the second heat-conducting box 33 and communicates with it through the through groove, and the storage box 61 is slidably inserted into the inside of the collection box 6. As the blower plate 54 blows away impurities on the mold, some impurities can enter the storage box 61 inside the collection box 6 through the through groove for temporary storage. When there are too many impurities in the storage box 61, they can be pulled out for cleaning, which facilitates the collection and treatment of the cleaned residue, ensures the smooth operation of each component, and reduces the frequency of equipment maintenance and cleaning.

[0031] A storage tank 7 is fixedly connected to the second heat conduction box 33; a pump 71 is fixedly connected to one side of the storage tank 7; a delivery pipe 72 is fixedly connected to the output end of the pump 71, and the end of the delivery pipe 72 away from the pump 71 is located inside the second heat conduction box 33; a winding rod is rotatably connected to the inside of the second heat conduction box 33 via a second torsion spring; an extension pipe 73 is fixedly connected to one end of the pump 71, and the extension pipe 73 is wound around the winding rod; a nozzle 74 is fixedly connected to the bottom end of the air box 52, and the output end of the pump 71 can be connected to the nozzle 74 through the delivery pipe 72 and the extension pipe 73; when the two first electric sliders 51 drive the air box 52 to slide, the pump 71 can draw the release agent in the storage tank 7 and send it to the extension pipe 73 through the delivery pipe 72. The extension tube 73 is wound around the take-up rod and connected to the nozzle 74 at the bottom of the bellows 52. As the bellows 52 drives the nozzle 74 to slide, the extension tube 73 is pulled and extended. The take-up rod rotates and the second torsion spring is simultaneously stressed. The release agent is sprayed from the nozzle 74 toward the surface of the lower mold 16. After cleaning the mold, the release agent is sprayed simultaneously, which ensures that the release agent evenly covers the mold cavity and eliminates the need for a separate release agent spraying power structure. The spraying operation is completed simultaneously by the sliding action of the cleaning component, realizing the simultaneous completion of cleaning and release agent spraying in one process. This ensures the production cycle of multi-station cycles and can automatically control the spraying range according to the mold sliding stroke, reducing release agent waste and ensuring that subsequent injection molded products can be successfully demolded, reducing the problem of finished product scrap caused by sticking to the mold.

[0032] A second electric slider 8 is slidably connected to the inner wall of the second heat conduction box 33, and the second electric slider 8 is located near the delivery pipe 72; an immersion box 81 is fixedly connected to the second electric slider 8, and the immersion box 81 is slidably connected to the inner wall of the second heat conduction box 33, with an immersion tank at one end of the immersion box 81; when the spray port of the nozzle 74 is blocked for a long time, the cleaning solvent is poured into the immersion tank of the immersion box 81. As the nozzle 74 stops above the immersion box 81, the second electric slider 8 drives the immersion box 81 to slide upward, so that the nozzle 74 is immersed in the immersion tank. When the spray port is blocked for a long time, the cleaning solvent is poured into the immersion tank of the immersion box 81. During the spraying operation, the release agent flows and carries away the blockage impurities, achieving self-cleaning of the spraying port, reducing the workload of equipment maintenance, ensuring the stability of the release agent spraying operation, and avoiding uneven spraying of the release agent due to nozzle blockage, which would affect the subsequent demolding effect. At the same time, the residual heat leading to the interior of the No. 2 heat conduction box 33 can heat the cleaning solvent, using the residual heat to produce a warm cleaning solvent, and using the warm cleaning liquid to dissolve the solidified scale, ensuring the dissolution efficiency of the blockage impurities, adapting to the maintenance needs of long-term continuous production, and ensuring the continuous and stable operation of multi-station cyclic injection molding.

[0033] Two air ducts 9 are fixedly connected to one side of the air box 52; two air channels 91 are opened on the soaking box 81, and the air ducts 9 are located above the air channels 91; a connecting plate 92 is fixedly connected to the soaking tank of the soaking box 81, and the connecting plate 92 can communicate with the air channels 91; multiple aerators 93 are fixedly connected to the connecting plate 92; when the clogged nozzle 74 is soaked for self-cleaning, the soaking box 81 slides upward, causing the air channels 91 to fit and connect with the air ducts 9, and part of the air blown by the second electric fan 53 is introduced into the two air channels 91 through the two air ducts 9. After the connecting plate 92, multiple aerators 93 provide aeration, which can agitate and impact the nozzles 74 in the soaking tank, accelerate the dissolution and removal of the solidified mold release agent scale at the port, and ensure the self-cleaning effect. At the same time, the air will eventually be discharged into the second heat conduction box 33, which will not cause heat waste. It is suitable for the maintenance needs of long-term continuous automated production. Meanwhile, when the air box 52 drives the two air pipes 9 and the blowing plate 54 to move, air can be blown from the two air pipes 9 and the blowing plate 54 respectively, so as to achieve the effect of blowing dirt from the mold surface at different angles from multiple output ends.

[0034] like Figures 1 to 3 As shown, a support ring plate 94 is fixedly connected to the support column, and the support ring plate 94 is located below the third fixing plate 14; a water cooler 95 is fixedly connected to the support ring plate 94; the bottom ends of multiple first assembly seats 15 are fixedly connected to connecting ring plates 96 through short pipes, and three connecting ring plates 96 are provided, the inlet and outlet pipes of the three connecting ring plates 96 are all connected to the water cooler 95; when the plastic product is injection molded, the support ring plate 94 is fixed to the support column and the water cooler 95 is fixed thereon. The water cooler 95 is connected to the short pipes on the first fixing plate 12, the second fixing plate 13 and the third fixing plate 14 and multiple first assembly seats 15 through the three connecting ring plates 96 and their inlet and outlet pipes, respectively. The mounting base 15 and the lower mold 16 are installed on the first mounting base 15, and the water circuit is connected. Therefore, the water cooler 95 generates cooling water, which is sent to the connecting ring plate 96. The connecting ring plate 96 sends the water to multiple first mounting bases 15 and the lower mold 16 for circulation. This allows the plastic products to be cooled when they reach the two mold opening cooling stations. The cooling water supply is turned off at other stations, and the cooling water circulation is turned on only at the mold opening cooling station. This ensures the efficiency of cooling and shaping of the plastic products and avoids the ineffective supply of cooling water to other stations, reducing the waste of water resources and power consumption. The circulating cooling water can be controlled to adapt to the cycle time of multiple stations, ensuring the production efficiency of the device.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-station injection molding apparatus for processing plastic products, characterized in that: The system includes an injection molding machine base; a servo motor is fixedly mounted on the injection molding machine base; a support column is fixedly mounted on the servo motor, and a first fixed plate is fixedly mounted on the top of the support column; a second fixed plate is fixedly mounted on the outside of the first fixed plate; a third fixed plate is fixedly mounted on the outside of the second fixed plate, and the diameters of the first, second, and third fixed plates are arranged in ascending order; multiple first assembly seats are fixedly mounted on each of the first, second, and third fixed plates; lower molds are snapped onto the multiple first assembly seats; and an injection molding assembly is provided on the injection molding machine base, which is used to cooperate with multiple lower molds to perform multi-station injection molding of plastic products.

2. The multi-station injection molding apparatus for processing plastic products according to claim 1, characterized in that: The injection assembly includes a material storage tank, hydraulic cylinders, an injection molding machine, a first telescopic cylinder, a second assembly base, and an upper mold. The material storage tank is fixedly connected to the injection molding machine base. Two hydraulic cylinders are fixedly connected to the bottom end of the material storage tank. The injection molding machine is fixedly connected to the output end of the hydraulic cylinders. Multiple first telescopic cylinders are fixedly connected between the material storage tank and the injection molding machine, and the material storage tank can be connected to the injection molding machine through multiple first telescopic cylinders. Multiple second assembly bases are fixedly connected to the bottom end of the injection molding machine. Multiple upper molds are threadedly connected to the bottom end of the second assembly base, and the upper molds correspond to the lower molds.

3. The multi-station injection molding apparatus for processing plastic products according to claim 2, characterized in that: One end of the injection molding machine is fixedly connected to a support frame; the bottom end of the support frame is fixedly connected to a heat-conducting plate; one end of the heat-conducting plate is fixedly connected to a first heat-conducting box, and the other end of the heat-conducting plate is fixedly connected to a second heat-conducting box. The heat-conducting plate, the first heat-conducting box, and the second heat-conducting box are all made of metal. A supplementary heating fan is fixedly connected inside the second heat-conducting box; an inclined frame is fixedly connected to the first heat-conducting box, and the inclined frame is located on the upper surface of the first heat-conducting box away from the heat-conducting plate; a first electric fan is fixedly connected to the inclined frame; an exhaust pipe is fixedly connected to the second heat-conducting box, and the exhaust pipe is located on the upper surface of the second heat-conducting box away from the heat-conducting plate. The heat-conducting plate, the first heat-conducting box, and the second heat-conducting box are all provided with through holes, and the first heat-conducting box can be connected to the second heat-conducting box through the heat-conducting plate.

4. The multi-station injection molding apparatus for processing plastic products according to claim 3, characterized in that: A first metal foam board is fixedly attached to the upper part of the interior of the first heat conduction box; the interior of the first metal foam board has multiple first-level slots; a second metal foam board is fixedly attached to the center of the interior of the first heat conduction box; the interior of the second metal foam board has second-level slots; industrial paraffin wax is placed in both the first-level slots and the second-level slots.

5. The multi-station injection molding apparatus for processing plastic products according to claim 4, characterized in that: The interior of the first heat-conducting box is connected to a rotating rod via a torsion spring at one end near the heat-conducting plate; a baffle plate is fixed to the rotating rod; a magnetic block is fixed to the rotating rod; a second magnetic block is fixed to the interior of the first heat-conducting box near the rotating rod, and the first magnetic block can magnetically attract the second magnetic block.

6. The multi-station injection molding apparatus for processing plastic products according to claim 3, characterized in that: The inner wall of the second heat-conducting box has two slide rails fixedly connected to it, and the two slide rails are arranged opposite each other; a first electric slider is slidably connected to the slide rails; a wind box is fixedly connected between the two first electric sliders; two second electric fans are fixedly connected to the wind box; a blower plate is fixedly connected to one side of the wind box at an angle, and the output end of the second electric fan can be connected to the blower plate through the wind box; a collection box is fixedly connected to the end of the second heat-conducting box away from the heat-conducting plate; a through groove is opened between the collection box and the second heat-conducting box; a storage box is slidably connected to the collection box.

7. A multi-station injection molding apparatus for processing plastic products according to claim 6, characterized in that: A storage tank is fixedly connected to the second heat conduction box; a pump is fixedly connected to one side of the storage tank; a delivery pipe is fixedly connected to the output end of the pump, and the end of the delivery pipe away from the pump is located inside the second heat conduction box; a winding rod is rotatably connected to the inside of the second heat conduction box through a second torsion spring; an extension pipe is fixedly connected to one end of the pump, and the extension pipe is wound around the winding rod; a nozzle is fixedly connected to the bottom end of the air box, and the output end of the pump can be connected to the nozzle through the delivery pipe and the extension pipe.

8. A multi-station injection molding apparatus for processing plastic products according to claim 7, characterized in that: The inner wall of the second heat conduction box is slidably connected to a second electric slider, which is located near the delivery pipe; a soaking box is fixedly connected to the second electric slider, and the soaking box is slidably connected to the inner wall of the second heat conduction box, with a soaking tank at one end of the soaking box.

9. A multi-station injection molding apparatus for processing plastic products according to claim 8, characterized in that: Two air ducts are fixedly connected to one side of the air box; two air slots are opened on the soaking box, and the air ducts are located above the air slots; a connecting plate is fixedly connected to the soaking tank of the soaking box, and the connecting plate can communicate with the air slots; multiple aerators are fixedly connected to the connecting plate.

10. A multi-station injection molding apparatus for processing plastic products according to claim 1, characterized in that: A support ring plate is fixedly connected to the support column, and the support ring plate is located below the No. 3 fixed plate; a water cooler is fixedly connected to the support ring plate; the bottom ends of multiple No. 1 assembly seats are fixedly connected to connecting ring plates through short pipes, and there are three connecting ring plates. The inlet and outlet pipes of the three connecting ring plates are all connected to the water cooler.

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