Continuous injection molding device and injection molding process

Abstract

The invention relates to the field of injection molding machines, in particular to a continuous injection molding device and an injection molding process, the continuous injection molding device comprises a workbench, a motor and a hydraulic rod are mounted in the workbench, a rotating shaft is mounted on an output rotating shaft of the motor, the top end of the rotating shaft penetrates through the workbench and is fixedly connected with a placement table, and a limiting assembly assisting in limiting the placement table is further arranged on the rotating shaft. The lifting motion of the hydraulic rod is converted into mechanical linkage through the transmission assembly, so that the mold closing action of the upper mold and the lower mold and the ejection action of the discharging assembly are synchronously carried out, that is, when the hydraulic rod descends to close the mold, a first rack drives a transmission gear to rotate and synchronously drives a second rack to ascend, and an ejection rod is pushed to move through an abutting plate; therefore, the problem of low efficiency caused by the fact that each process depends on an independent mechanism or manual operation in a traditional scheme is avoided, full-process mechanical linkage of injection molding, cooling and demolding is realized, and waiting time among the processes is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, and in particular to a continuous injection molding device and an injection molding process. Background Art

[0002] A vertical injection molding machine is a mechanical device, usually composed of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, a safety monitoring system, etc. The injection system is one of the most important components of an injection molding machine. Generally, there are three main types: plunger type, screw type, and screw pre-plasticizing plunger injection type. The most widely used is the screw type. Its function is to heat and plasticize a certain amount of plastic within a specified time in one cycle of the injection molding machine, and then inject the molten plastic into the mold cavity through the screw under a certain pressure and speed.

[0003] After searching, the Chinese patent with the announcement number CN222309578U discloses an injection mold capable of continuous injection molding. It completes the injection molding by injecting melted plastic into the mounting frame. After the injection molding is completed, the reduction motor drives the rotary disk to rotate, thereby changing the position of the mold. Four groups of molds are set up, with one group for injection molding, two groups for cooling, and one group for demolding. In this way, the injection molding, cooling, and demolding cycles are continuously produced, realizing sustainable injection molding, improving injection molding efficiency, and solving the problem of inconvenient continuous injection molding.

[0004] The above solution only achieves continuous production by switching workstations through a rotary disk. However, actions such as injection molding, cooling, and demolding rely on independent mechanisms or manual operations. There is no mechanical linkage between the various processes, and the efficiency improvement is limited. In addition, the injection molded part and the upper mold are designed to be separated. After the mold is closed, the internal pressure of the mold cannot be locked by the structure. The plastic liquid is prone to leakage or insufficient filling due to gaps, resulting in defects such as shrinkage and material shortage in the product.

[0005] Therefore, the present invention provides a continuous injection molding device and an injection molding process to solve the above problems. Summary of the Invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a continuous injection molding device and injection molding process to solve the problems that the injection, cooling, demoulding and other actions rely on independent mechanisms or manual operations, there is no mechanical linkage between the various processes, the efficiency improvement is limited, and the injection molded part and the upper mold are designed to be separated. After the mold is closed, the internal pressure of the mold cannot be locked by the structure. The plastic liquid is easy to leak due to gaps or insufficient filling, resulting in defects such as shrinkage and material shortage in the product.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A continuous injection molding device includes a workbench, a motor and a hydraulic rod are installed in the workbench, the output shaft of the motor is installed with a rotating shaft, the top of the rotating shaft passes through the workbench and is fixedly connected to the placement table, and a limiting component is also provided on the rotating shaft to assist in limiting the placement table, two groups of lower molds are fixedly connected to the placement table, each of the lower molds is provided with a blanking component, the telescopic end of the hydraulic rod is fixedly connected to a lifting platform, an upper mold is installed on the lifting platform, and the upper mold matches the lower mold, an injection structure is installed on the upper mold, a transmission component is provided in the workbench, and the lifting platform and the blanking component move toward each other through the transmission component.

[0008] Preferably, the blanking assembly includes a ejector rod and a ejector plate, a molding cavity is provided on the lower mold, a receiving groove is provided on the inner bottom wall of the molding cavity, one end of the ejector rod passes through the lower mold and is fixedly connected to the blanking plate, and the blanking plate matches the receiving groove, and the other end of the ejector rod is fixedly connected to the ejector plate.

[0009] Preferably, the transmission assembly includes a transmission shaft rotatably connected to the workbench, both ends of the transmission shaft are fixedly connected to transmission gears, the telescopic end of the hydraulic rod is fixedly connected to a first connecting plate, the first connecting plate is fixedly connected to a first rack, and the first rack is meshed with the transmission gear.

[0010] Preferably, the transmission assembly also includes a lifting rod slidably connected to the workbench, one end of the lifting rod is fixedly connected to a supporting plate, the other end of the lifting rod is fixedly connected to a second connecting plate, the second connecting plate is fixedly connected to a second rack, and the second rack is meshed with the transmission gear.

[0011] Preferably, the limiting assembly includes a turntable fixedly connected to the rotating shaft, the turntable is provided with positioning holes in a circumferential array, the second connecting plate is fixedly connected to a limiting pin, and the limiting pin matches the positioning hole.

[0012] Preferably, two symmetrical support seats are fixedly connected to the workbench, and the two support seats are fixedly connected to the first blowing seat, and the first blowing seat is located above the lower mold. A first blower is installed in the workbench, and the exhaust end of the first blower is fixedly connected to the first blowing seat.

[0013] Preferably, a second blowing seat is fixedly connected to the workbench, and the second blowing seat is located below the upper mold. A second blower is installed in the workbench, and the exhaust end of the second blower is fixedly connected to the second blowing seat. The placement table is provided with air vents in a circular array.

[0014] Preferably, a guide rod is fixedly connected to the lifting platform, a guide seat is fixedly connected to the workbench, and the bottom end of the guide rod is slidably connected to the guide seat.

[0015] An injection molding process of a continuous injection molding device comprises the following steps: S1. The output shaft of the motor drives the rotating shaft to rotate, and the rotating shaft drives the placement table to rotate 90 degrees, and the lower mold without material in the molding cavity is rotated and moved to the bottom of one of the first blowing seats, and the first blower is used to send air into the first blowing seat to clean the molding cavity.

[0016] S2. The output shaft of the motor drives the rotating shaft to rotate, and the rotating shaft drives the placement table to rotate 90 degrees, the cleaned lower mold is moved to the bottom of the upper mold, and the other lower mold is moved to the bottom of the first blowing seat for cleaning, and then the telescopic end of the hydraulic rod drives the lifting table to move downward, thereby completing the mold closing of the upper and lower molds, and injecting the plastic liquid into the mold cavities of the upper and lower molds through the injection structure, and continuously maintaining the pressure to form the injection molded parts.

[0017] S3. The telescopic end of the hydraulic rod drives the lifting platform to move upward to complete the mold opening of the upper mold and the lower mold, and the output shaft of the motor drives the rotating shaft to rotate, and the rotating shaft drives the placement platform to rotate 90 degrees, and the lower mold with the injection molded part is moved to the bottom of another first blowing seat. The first blower sends air into the first blowing seat to cool the injection molded part. At this time, the cleaned lower mold will be moved to the bottom of the upper mold for injection molding again.

[0018] S4. The output shaft of the motor drives the rotating shaft to rotate, and the rotating shaft drives the placement table to rotate 90 degrees, and the lower mold with the cooled injection molded part is moved to the relative position of the upper mold, and then the telescopic end of the hydraulic rod drives the lifting platform to move downward, and when the upper and lower molds are completed, the telescopic end of the hydraulic rod drives the first connecting plate to move downward, and the engagement of the first rack and the transmission gear drives the transmission shaft to rotate, and under the engagement of the transmission gear and the second rack, the second rack drives the second connecting plate to move upward. At this time, the limit pin is inserted into the positioning hole and the placement table is limited by the turntable. The lifting rod continues to drive the abutment plate to move upward, and abuts on the ejection plate to drive the ejection rod to move upward, and then the injection molded part in the molding cavity is pushed out of the molding cavity through the ejection plate.

[0019] The beneficial effects of the present invention are: 1. The lifting and lowering motion of the hydraulic rod is converted into mechanical linkage through the transmission component, so that the mold closing action of the upper and lower molds and the ejection action of the blanking component are carried out synchronously. That is, when the hydraulic rod descends to close the mold, the first rack drives the transmission gear to rotate, synchronously driving the second rack to rise, pushing the ejection rod to move through the abutment plate, and then the ejection rod drives the blanking plate to eject the injection molded part. This avoids the inefficiency of each process relying on independent mechanisms or manual operation in traditional solutions, realizes the mechanical linkage of the entire process of injection molding, cooling, and demolding, and reduces the waiting time between processes.

[0020] 2. By setting the first blowing seat and the second blowing seat, and connecting the first blowing seat and the second blowing seat to the first blower and the second blower respectively, the first blowing seat in the cleaning position can spray compressed air through the air nozzle to remove residual impurities in the molding cavity to prevent impurities from affecting the quality of the next injection molding. The first blowing seat in the cooling position quickly cools the injection molded parts through low temperature.

[0021] 3. By using a blanking plate with a heat-resistant sealing ring, the bottom of the molding cavity is completely sealed when the mold is closed, effectively preventing plastic melt leakage or pressure loss. The hydraulic system maintains pressure and cooperates with the precise closure of the mold to ensure that the melt fully fills the cavity, improves the dimensional accuracy and surface quality of the product, and reduces the scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a three-dimensional Figure 1 .

[0023] Figure 2 The present invention is a three-dimensional Figure 2 .

[0024] Figure 3 It is the front view of the present invention.

[0025] Figure 4 The cross-sectional view of the present invention Figure 1 .

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at center A.

[0027] Figure 6 The cross-sectional view of the present invention Figure 2 .

[0028] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the middle.

[0029] Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure at position C in the middle.

[0030] Figure 9It is a structural schematic diagram of the blanking component in the present invention.

[0031] In the figure: 1. workbench; 2. placing table; 3. lower mold; 5. lifting platform; 6. upper mold; 7. transmission assembly; 71. transmission shaft; 72. transmission gear; 73. first connecting plate; 74. first rack; 75. lifting rod; 76. second connecting plate; 77. second rack; 78. abutment plate; 8. limit assembly; 81. turntable; 82. positioning hole; 83. limit pin; 9. blanking assembly; 91. ejector rod; 92. ejector plate; 93. blanking plate; 10. injection structure; 11. support seat; 12. first blowing seat; 13. first blower; 14. guide seat; 15. guide rod; 16. air vent; 17. hydraulic rod; 18. second blower; 19. second blowing seat; 20. motor; 21. rotating shaft; 22. molding cavity; 23. storage slot. DETAILED DESCRIPTION

[0032] The following will refer to the attached Figures 1 to 9 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0033] A continuous injection molding device, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 8 As shown, it includes a workbench 1, in which a motor 20 and a hydraulic rod 17 are installed. The output shaft of the motor 20 is installed with a rotating shaft 21. The top of the rotating shaft 21 passes through the workbench 1 and is fixedly connected to the placement table 2. The space on the upper surface of the placement table 2 is equidistantly divided into a material unloading position, a cleaning position, a mold closing and injection position, and a cooling position. The rotating shaft 21 is also provided with a limiting component 8 for assisting in limiting the placement table 2. Two groups of lower molds 3 are fixedly connected to the placement table 2. The two groups of lower molds 3 are respectively located at the material unloading position, the cleaning position, the mold closing and injection position, and the cooling position. Each lower mold 3 is provided with a material unloading component 9. The telescopic end of the hydraulic rod 17 is fixedly connected to the lifting platform 5, and the upper mold 6 is installed on the lifting platform 5, and the upper mold 6 is matched with the lower mold 3. The upper mold 6 is installed with an injection structure 10, and the injection structure 10 adopts an injection system with a heater. A screw injection system, a plunger injection system or a screw pre-plastic plunger injection system can be selected. The plastic particles are heated and melted by the heater, and the plastic liquid is injected into the mold cavity formed by the upper mold 6 and the lower mold 3 through the injection system for injection molding. A transmission component 7 is provided in the workbench 1, and the lifting platform 5 and the blanking component 9 move toward each other through the transmission component 7.

[0034] like Figure 8 and Figure 9 As shown, the blanking assembly 9 includes a ejector rod 91 and a ejector plate 92. A molding cavity 22 is provided on the lower mold 3. A receiving groove 23 is provided on the inner bottom wall of the molding cavity 22. One end of the ejector rod 91 passes through the lower mold 3 and is fixedly connected to the ejector plate 93. The ejector plate 93 matches the receiving groove 23. The other end of the ejector rod 91 is fixedly connected to the ejector plate 92. A heat-resistant sealing ring is also designed on the ejector plate 93. When the ejector plate 93 is inside the receiving groove 23, the receiving groove 23 can be completely sealed to prevent the plastic liquid from penetrating into the receiving groove 23. After the injection molded part is molded in the molding cavity 22, the injection molded part can be ejected by rising and moving the ejector plate 93. A spring can also be provided on the ejector rod 91 to use the elastic force of the spring to quickly reset the ejector plate 92.

[0035] like Figure 4 、 Figure 6 and Figure 7 As shown, the transmission assembly 7 includes a transmission shaft 71 rotatably connected to the workbench 1, and both ends of the transmission shaft 71 are fixedly connected to a transmission gear 72. The telescopic end of the hydraulic rod 17 is fixedly connected to a first connecting plate 73, and a first rack 74 is fixedly connected to the first connecting plate 73, and the first rack 74 is meshed with the transmission gear 72. In order to improve the stability of the transmission shaft 71 in the workbench 1, a seat can be added to the middle section of the transmission shaft 71 to improve the rotation stability of the transmission shaft 71. After the telescopic end of the hydraulic rod 17 is raised and lowered, it will drive the first rack 74 to mesh with the transmission gear 72 through the first connecting plate 73, and the transmission gear 72 will drive the transmission shaft 71 to rotate.

[0036] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the transmission assembly 7 also includes a lifting rod 75 slidably connected to the workbench 1, one end of the lifting rod 75 is fixedly connected to a supporting plate 78, and the supporting plate 78 is located below the ejection plate 92, and the other end of the lifting rod 75 is fixedly connected to a second connecting plate 76, and a second rack 77 is fixedly connected to the second connecting plate 76, and the second rack 77 is meshed with the transmission gear 72. After the transmission gear 72 rotates, it will drive the second rack 77 to move in the opposite direction of the first rack 74, and the second rack 77 will drive the supporting plate 78 to move through the second connecting plate 76 and the lifting rod 75, and then the supporting plate 78 will be pressed against the ejection plate 92 to move the ejection rod 91, so as to complete the application of lifting force to the blanking assembly 9.

[0037] like Figure 4 and Figure 5As shown, the limiting assembly 8 includes a turntable 81 fixedly connected to the rotating shaft 21, and the turntable 81 is provided with positioning holes 82 in a circular array. The positions of the positioning holes 82 match the position of the lower mold 3. The second connecting plate 76 is fixedly connected to a limiting pin 83, and the limiting pin 83 matches the positioning hole 82. When the second connecting plate 76 moves upward, the limiting pin 83 will be inserted into the positioning hole 82 to limit the turntable 81, and then limit the placement table 2 after rotation.

[0038] like Figure 1 、 Figure 2 、 Figure 3 and Figure 6 As shown, two symmetrical support seats 11 are fixedly connected to the workbench 1, and the two support seats 11 are fixedly connected to the first blowing seat 12, and the first blowing seat 12 is located above the lower mold 3. A first blower 13 is installed in the workbench 1, and the exhaust end of the first blower 13 is fixedly connected to the first blowing seat 12. The two first blowers 13 respectively have the effects of cleaning and cooling. The first blower 13 in the cooling position adopts a low wind speed blower, and the wind blown out with lower pressure can clean the lower mold 3 in the cleaning position and cool the injection molded parts in the cooling position.

[0039] like Figure 3 and Figure 4 As shown, a second blowing seat 19 is fixedly connected to the workbench 1, and the second blowing seat 19 is located below the upper mold 6. A second blower 18 is installed in the workbench 1, and the exhaust end of the second blower 18 is fixedly connected to the second blowing seat 19. A circular array of air vents 16 are provided on the placement table 2. The first blowing seat 12 and the second blowing seat 19 are both plate structures with multiple air nozzles installed on the surface. When the placement table 2 rotates, the top of the second blowing seat 19 can be exposed to the outside through the air vent 16, and air can be supplied to the second blowing seat 19 through the second blower 18, and the upper mold 6 can be blown and cleaned through the second blowing seat 19. In addition, air inlets for the second blower 18 and the first blower 13 are designed on the workbench 1, and the air inlets are connected to the outside air through a filter. A cooling fan is also designed in the workbench 1 to dissipate heat from the structure inside the workbench 1.

[0040] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a guide rod 15 is fixedly connected to the lifting platform 5, and a guide seat 14 is fixedly connected to the workbench 1. The bottom end of the guide rod 15 is slidably connected to the guide seat 14. When the lifting platform 5 is raised or lowered, the guide rod 15 is driven to slide on the guide seat 14, thereby improving the stability of the movement of the lifting platform 5.

[0041] An injection molding process of a continuous injection molding device comprises the following steps: S1. The output shaft of the motor 20 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the placement table 2 to rotate 90 degrees, and the lower mold 3 without material in the molding cavity 22 is rotated and moved to the bottom of one of the first blowing seats 12, and the first blower 13 is used to send air into the first blowing seat 12 to clean the molding cavity 22.

[0042] S2. The output shaft of the motor 20 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the placement table 2 to rotate 90 degrees, and the cleaned lower mold 3 is moved to the bottom of the upper mold 6, and the other lower mold 3 is moved to the bottom of the first blowing seat 12 for cleaning, and then the telescopic end of the hydraulic rod 17 drives the lifting platform 5 to move downward, thereby completing the mold closing of the upper mold 6 and the lower mold 3, and then, the plastic liquid is injected into the mold cavity of the upper mold 6 and the lower mold 3 through the injection structure 10, and the pressure is maintained continuously to form the injection molded part in the mold cavity.

[0043] S3. The lifting platform 5 is driven to move upward by the telescopic end of the hydraulic rod 17 to complete the mold opening of the upper mold 6 and the lower mold 3, and the rotating shaft 21 is driven to rotate by the output shaft of the motor 20, and the rotating shaft 21 drives the placement platform 2 to rotate 90 degrees, and the lower mold 3 with the injection molded part is moved to the bottom of another first blowing seat 12, and the first blower 13 is used to send air into the first blowing seat 12 to cool the injection molded part. At the same time, the lower mold 3 in the cleaned state will be moved to the bottom of the upper mold 6 for injection molding operation, and the other lower mold 3 will be moved to the cleaning position for cleaning.

[0044] S4, the output shaft of the motor 20 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the placing table 2 to rotate 90 degrees, and the lower mold 3 with the cooled injection molded part is moved to the unloading position, the cleaned lower mold 3 is moved to the mold closing injection position, and the lower mold 3 after injection is moved to the cooling position. When the injection is performed, the telescopic end of the hydraulic rod 17 drives the lifting platform 5 to move downward, and then when the mold closing of the upper mold 6 and the lower mold 3 is completed, the telescopic end of the hydraulic rod 17 drives the first connecting plate 73 to move downward, and the meshing of the first rack 74 and the transmission gear 72 is performed. The combination drives the transmission shaft 71 to rotate, and under the meshing action of the transmission gear 72 and the second rack 77, the second rack 77 drives the second connecting plate 76 to move upward. At this time, the limit pin 83 is inserted into the positioning hole 82 to limit the placement table 2 through the turntable 81, and the lifting rod 75 continues to drive the abutment plate 78 to move upward, and abuts on the ejection plate 92 to drive the ejection rod 91 to move upward, and then the injection molded part in the molding cavity 22 is pushed out of the molding cavity 22 through the unloading plate 93. Repeat the above actions to complete the continuous cleaning, injection molding, cooling and unloading actions.

[0045] It should be noted that in the description of the present invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0047] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A continuous injection molding device, comprising a workbench (1), characterized in that: A motor (20) and a hydraulic rod (17) are installed in the workbench (1), and the output shaft of the motor (20) is installed with a rotating shaft (21). The top end of the rotating shaft (21) passes through the workbench (1) and is fixedly connected to the placement table (2). The rotating shaft (21) is also provided with a limiting component (8) for assisting in limiting the placement table (2). Two groups of lower molds (3) are fixedly connected to the placement table (2), and each of the lower molds (3) is provided with a blanking component (9). The telescopic end of the hydraulic rod (17) is fixedly connected to a lifting platform (5), and an upper mold (6) is installed on the lifting platform (5), and the upper mold (6) matches the lower mold (3). An injection structure (10) is installed on the upper mold (6). A transmission component (7) is provided in the workbench (1), and the lifting platform (5) and the blanking component (9) move toward each other through the transmission component (7).

2. A continuous injection molding device according to claim 1, characterized in that: The blanking assembly (9) includes a ejector rod (91) and an ejector plate (92); a molding cavity (22) is provided on the lower mold (3); a receiving groove (23) is provided on the inner bottom wall of the molding cavity (22); one end of the ejector rod (91) passes through the lower mold (3) and is fixedly connected to the blanking plate (93); the blanking plate (93) matches the receiving groove (23); and the other end of the ejector rod (91) is fixedly connected to the ejector plate (92).

3. A continuous injection molding device according to claim 1, characterized in that: The transmission assembly (7) includes a transmission shaft (71) rotatably connected to the workbench (1), both ends of the transmission shaft (71) are fixedly connected to a transmission gear (72), the telescopic end of the hydraulic rod (17) is fixedly connected to a first connecting plate (73), the first connecting plate (73) is fixedly connected to a first rack (74), and the first rack (74) is meshed with the transmission gear (72).

4. A continuous injection molding device according to claim 3, characterized in that: The transmission assembly (7) further comprises a lifting rod (75) slidably connected to the workbench (1), one end of the lifting rod (75) being fixedly connected to a supporting plate (78), the other end of the lifting rod (75) being fixedly connected to a second connecting plate (76), a second rack (77) being fixedly connected to the second connecting plate (76), and the second rack (77) being meshed with the transmission gear (72).

5. A continuous injection molding device according to claim 4, characterized in that: The limiting assembly (8) includes a turntable (81) fixedly connected to the rotating shaft (21), the turntable (81) is provided with positioning holes (82) in a circumferential array, and the second connecting plate (76) is fixedly connected to a limiting pin (83), and the limiting pin (83) matches the positioning hole (82).

6. A continuous injection molding device according to claim 1, characterized in that: Two symmetrical support seats (11) are fixedly connected to the workbench (1), and a first blowing seat (12) is fixedly connected to the two support seats (11). The first blowing seat (12) is located above the lower mold (3). A first blower (13) is installed in the workbench (1), and an exhaust end of the first blower (13) is fixedly connected to the first blowing seat (12).

7. A continuous injection molding device according to claim 1, characterized in that: A second blowing seat (19) is fixedly connected to the workbench (1), and the second blowing seat (19) is located below the upper mold (6). A second blower (18) is installed in the workbench (1), and the exhaust end of the second blower (18) is fixedly connected to the second blowing seat (19). The placement table (2) is provided with air vents (16) in a circular array.

8. A continuous injection molding device according to claim 1, characterized in that: A guide rod (15) is fixedly connected to the lifting platform (5), a guide seat (14) is fixedly connected to the workbench (1), and the bottom end of the guide rod (15) is slidably connected to the guide seat (14).

9. The injection molding process of a continuous injection molding device according to any one of claims 1 to 9, characterized in that: The steps include: S1, driving the rotating shaft (21) to rotate by the output shaft of the motor (20), and causing the rotating shaft (21) to drive the placement table (2) to rotate 90 degrees, rotating and moving the lower mold (3) in which no material exists in the molding cavity (22) to the bottom of one of the first blowing seats (12), and sending air into the first blowing seat (12) by the first blower (13) to clean the molding cavity (22); S2, the output shaft of the motor (20) drives the rotating shaft (21) to rotate, and the rotating shaft (21) drives the placement table (2) to rotate 90 degrees, and the cleaned lower mold (3) is moved to the bottom of the upper mold (6), and the other lower mold (3) is moved to the bottom of the first blowing seat (12) for cleaning, and then the telescopic end of the hydraulic rod (17) drives the lifting platform (5) to move downward, thereby completing the mold closing of the upper mold (6) and the lower mold (3), and injecting the plastic liquid into the mold cavity of the upper mold (6) and the lower mold (3) through the injection structure (10), and continuously maintaining the pressure to form the injection molded part; S3, the telescopic end of the hydraulic rod (17) drives the lifting platform (5) to move upward, completing the mold opening of the upper mold (6) and the lower mold (3), and the output shaft of the motor (20) drives the rotating shaft (21) to rotate, and the rotating shaft (21) drives the placement platform (2) to rotate 90 degrees, and the lower mold (3) with the injection molded part is moved to the bottom of another first blowing seat (12), and the first blower (13) sends air into the first blowing seat (12) to cool the injection molded part. At this time, the cleaned lower mold (3) will be moved to the bottom of the upper mold (6) for injection molding again; S4, the output shaft of the motor (20) drives the rotating shaft (21) to rotate, and the rotating shaft (21) drives the placement table (2) to rotate 90 degrees, and the lower mold (3) with the cooled injection molded part is moved to the relative position of the upper mold (6), and then the telescopic end of the hydraulic rod (17) drives the lifting platform (5) to move downward, and when the upper mold (6) and the lower mold (3) are closed, the telescopic end of the hydraulic rod (17) drives the first connecting plate (73) to move downward, and the first rack (74) is engaged with the transmission gear (72) to drive the transmission gear (72) to move downward. The driving shaft (71) rotates, and under the meshing action of the transmission gear (72) and the second rack (77), the second rack (77) drives the second connecting plate (76) to move upward. At this time, the limiting pin (83) is inserted into the positioning hole (82) and limits the placement table (2) through the turntable (81). The lifting rod (75) continuously drives the abutting plate (78) to move upward, and abuts on the ejecting plate (92) to drive the ejecting rod (91) to move upward, and then pushes the injection molded part in the molding cavity (22) out of the molding cavity (22) through the unloading plate (93).

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