Micro-pressure 3D molding injection molding device and process

Abstract

The micro-pressure 3D forming injection molding device comprises an injection molding machine frame, a rotating disc is rotationally installed in the middle of the upper end of the injection molding machine frame and is controlled by a rotating mechanism to rotate intermittently, an injection molding station, a waiting station, a material taking station and a preheating station are arranged at the upper end of the rotating disc, and each station is provided with an injection mold; a pressing plate used for pressing the upper mold is arranged above the injection molding station, an injection head used for conducting injection molding on the injection mold is installed on the pressing plate, the pressing plate is driven by an air cylinder to descend to press the upper mold, and meanwhile the injection head conveys colloid through an injection molding module to conduct injection molding on the injection mold. According to the injection molding machine, when the pressing plate descends to press the injection mold through the material taking mechanism, the upper mold in the material taking station is opened at the same time, so that an injection molded product is exposed at the upper end of the lower mold, finally, the product is taken out and subjected to quality inspection, operation is easy and safe, and the production efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-injection molding machines, and particularly relates to a micro-pressure 3D molding injection device and process. Background Art

[0002] A micro-injection molding machine is a machine used for plastic injection molding. It can inject plastic materials into a mold under a relatively low pressure, and through heating and pressurization, the plastic materials are cured and formed to finally obtain the required plastic products. It usually has a relatively low injection pressure and a relatively large injection capacity to meet the needs of low-pressure injection. Due to the relatively low pressure, the flow of plastic in the mold is more uniform, which helps to improve the surface quality and dimensional accuracy of the products. It is widely used in the manufacturing of plastic parts in industries such as automotive, electronics, household appliances, toys, medical, and packaging. For example, automotive interior parts, shells, instrument panels, etc., electronic product shells, connectors, household appliance shells, accessories, toy shells, parts, medical device accessories, and various packaging materials.

[0003] In the Chinese utility model patent with the publication number CN216182176U, a multi-station rotary low-pressure injection molding machine is disclosed, which includes an injection molding machine body. There is a nozzle on the injection molding machine body, and an injection module is connected to the nozzle for injecting glue into the nozzle. There is also a multi-station rotary module connected to the injection molding machine body for placing and rotating the products to be injected, being injected, and having been injected. This utility model adopts a three-station design, so that the waiting for injection, being injected, and having been injected of the products can be carried out simultaneously, enabling the products to perform actions in three states at the same time, thereby improving production efficiency, increasing speed, and shortening the production cycle. Regarding the above related technologies, the inventor believes that there are the following defects: After the mold on the injection station is injection-molded, it directly rotates to the injection-completed station. Since the mold is at a relatively high temperature after injection, it is easy for workers to be scalded by the mold when manually taking away the injection-molded products. And when taking out the products, it is necessary to manually open the mold, resulting in low work efficiency and increasing the risk of workers being scalded. Summary of the Invention

[0004] The purpose of the present invention is to provide a micro-pressure 3D molding injection device and process to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A micro-pressure 3D molding injection device includes an injection molding frame. A fixed frame is provided at the upper end of the injection molding frame. A turntable is rotatably installed in the middle of the upper end of the injection molding frame, and the turntable is controlled to rotate intermittently through a rotating mechanism.

[0006] Four workstations are evenly distributed near the outer diameter of the upper end of the turntable, and an injection mold is provided at each workstation. The injection mold includes a lower mold and an upper mold.

[0007] Among them, the four workstations are an injection molding workstation, a waiting workstation, a material taking workstation, and a preheating workstation respectively;

[0008] Above the injection molding workstation, there is a pressing plate for pressing the upper mold, and an injection head for injecting the injection molding die is installed on the pressing plate;

[0009] The pressing plate is driven by a cylinder to descend to press the upper mold, and at the same time, the injection head conveys the colloid through the injection molding module to inject the injection molding die;

[0010] Among them, when the pressing plate descends to press the upper mold, the upper mold in the material taking workstation is controlled to be opened by the material taking mechanism.

[0011] Preferably, the material taking mechanism includes a swing arm, and sliding grooves are provided near both ends of the swing arm;

[0012] A fixing plate is provided at the lower end of the fixing frame, and the middle part of the swing arm is rotatably installed on one side of the lower end of the fixing plate;

[0013] In the middle of the upper end of the pressing plate, there is a mouth-shaped plate, and a first sliding column is provided inside the mouth-shaped plate, and the first sliding column is movably connected with one of the sliding grooves;

[0014] The material taking mechanism further includes a lifting frame that is slidably connected to the fixing frame up and down. A second sliding column is provided inside the lifting frame, and the second sliding column is movably connected with the other sliding groove;

[0015] A first mold opening plate and a second mold opening plate are installed at the bottom of the lifting frame. The first mold opening plate and the second mold opening plate are located on both sides of the lower mold, and limiting blocks are provided on both sides of the upper mold;

[0016] Among them, when the first mold opening plate and the second mold opening plate rise, they jack up the two limiting blocks to open the upper mold.

[0017] Preferably, the lifting frame includes a bottom plate at the bottom of the lifting frame and a lifting column at the upper end of the lifting frame. The lifting column is slidably connected to the fixing frame up and down;

[0018] A limiting plate for supporting and limiting the lifting frame is provided at the upper end of the lifting column.

[0019] Preferably, when the turntable rotates, the first mold opening plate and the second mold opening plate are controlled to move away from the lower mold through the avoidance mechanism;

[0020] Among them, the avoidance mechanism includes a first gear and two second gears rotatably installed at the upper end of the bottom plate. The first gear is meshed with the two second gears respectively;

[0021] A third bevel gear is fixedly connected to the upper end of the first gear, and a second bevel gear is rotatably installed on the lifting frame. The second bevel gear is meshed with the third bevel gear;

[0022] In the middle of the upper end of the turntable, a first bevel gear is fixedly installed, and the first bevel gear is meshed and connected with a second bevel gear;

[0023] At the lower ends of the two second gears, an incomplete gear one is connected through a rotating shaft, and the incomplete gear one is located below the bottom plate;

[0024] One end of the mold opening plate one is provided with an incomplete gear two, and the incomplete gear two is rotatably installed below the bottom plate, and the incomplete gear two is meshed and connected with one of the incomplete gears one;

[0025] One side of the bottom plate is provided with a first spring plate, and the first spring plate and one side of the mold opening plate one are connected through a first return spring;

[0026] One side of the mold opening plate two is provided with a rack, and the rack is meshed and connected with the other incomplete gear one;

[0027] The upper end of the mold opening plate two is provided with a guide rail, the lower end of the bottom plate is provided with a guide groove, and the mold opening plate two is slidably connected through the guide rail and the guide groove;

[0028] One side of the bottom plate is provided with a second spring plate, and the second spring plate and one end of the mold opening plate two are connected through a second return spring.

[0029] Preferably, the speed ratio of the first bevel gear to the second bevel gear is 1:4.

[0030] Preferably, the rotating mechanism includes a slewing bearing installed at the upper end of the injection molding machine frame, and the turntable is installed at the upper end of the slewing bearing;

[0031] A motor is fixedly installed at the bottom of the injection molding machine frame, a gear three is provided at the output end of the motor, and the gear three is meshed and connected with the slewing bearing.

[0032] Preferably, the bottom of the lower mold penetrates through the turntable and extends below the turntable, and a preheating module for heating the injection mold is fixedly installed at the upper end of the injection molding machine frame, and the preheating module is located below the preheating station.

[0033] Preferably, the injection module is fixedly installed at the upper end of the fixing frame, and the injection head is connected with the injection module through a glue conveying pipe;

[0034] The upper end of the upper mold is provided with an injection hole matching the injection head, and after the pressing plate descends, the injection head is inserted into the injection hole to inject the injection mold.

[0035] Preferably, four guide posts are provided at four corner positions near the upper end of the lower mold, and the upper mold is slidably connected up and down with the guide posts.

[0036] A micro-pressure 3D injection molding process, used in conjunction with the described micro-pressure 3D injection molding device, includes the following steps:

[0037] S1. Install four injection molds on four workstations respectively, and turn on the preheating module to heat the injection mold on the preheating workstation.

[0038] S2. Drive the turntable to rotate 90 degrees through the rotating mechanism. The preheated injection mold on the preheating workstation rotates to the injection workstation position. Drive the pressure plate to descend through the cylinder and press down the upper mold in the injection workstation, so that the upper and lower molds have a qualified clamping force. Then, the injection module injects the colloid into the injection mold through the injection head, so that the colloid is formed in the injection mold. After injection is completed, the cylinder drives the pressure plate to rise.

[0039] S3. Drive the turntable to rotate 90 degrees again through the rotating mechanism. The injection mold that has completed injection on the injection workstation rotates to the waiting workstation for a short cooling, and the injection workstation continues to inject the next injection mold.

[0040] S4. Drive the turntable to rotate 90 degrees again through the rotating mechanism. The injection mold on the waiting workstation is rotated to the material taking workstation, and the injection workstation continues to inject the next injection mold. When the cylinder drives the pressure plate to descend and clamp the upper mold, the upper mold in the material taking workstation is controlled to open by the material taking mechanism.

[0041] S5. After the upper mold is opened, the injection molded product is exposed at the upper end of the lower mold. Take out the product and conduct quality inspection.

[0042] Compared with the prior art, the beneficial effects of the present invention are:

[0043] The present invention can heat the injection mold through the preheating module, so that the temperature of the colloid will not drop rapidly after entering the injection mold, enabling the colloid to have better fluidity inside the injection mold, improving the injection molding efficiency and product quality. The rotating mechanism drives the turntable to rotate 90 degrees, so that the preheated injection mold on the preheating station rotates to the injection station position. The cylinder drives the pressing plate to descend and presses down the upper mold in the injection station, so that the upper mold and the lower mold have a qualified clamping force. Then, the injection module injects into the injection mold, and the colloid is molded inside the injection mold. After the injection is completed, the cylinder drives the pressing plate to rise. Again, the rotating mechanism drives the turntable to rotate 90 degrees, and the injection mold that has completed injection on the injection station rotates to the waiting station for a short cooling. The injection station continues to inject the next injection mold. Again, the rotating mechanism drives the turntable to rotate 90 degrees, and the injection mold on the waiting station is rotated to the material taking station. The injection station continues to inject the next injection mold. When the cylinder drives the pressing plate to descend and clamp the upper mold, the upper mold in the material taking station is controlled to be opened by the material taking mechanism. After the upper mold is opened, the injection-molded product is exposed at the upper end of the lower mold. Finally, the product is taken out and inspected. The operation is simple and relatively safe, and the production efficiency is further improved.

[0044] When the rotating mechanism drives the turntable to rotate, the injection mold will rotate with the turntable. The opening template one and the opening template two are located on both sides of the lower mold, so that the opening template one and the opening template two will interfere with the rotation of the injection mold. Therefore, when the turntable rotates, the opening template one and the opening template two can be moved away from the lower mold through the avoidance mechanism to prevent interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is the schematic diagram of the overall structure of the present invention Figure One ;

[0046] Figure 2 is the schematic diagram of the overall structure of the present invention Figure Two ;

[0047] Figure 3 is the top view of the present invention;

[0048] Figure 4 is the front view of the present invention;

[0049] Figure 5 is the side view of the present invention;

[0050] Figure 6 is the side sectional view of the present invention;

[0051] Figure 7 is the schematic diagram of the lifting frame structure of the present invention;

[0052] Figure 8 is the schematic diagram of the avoidance mechanism of the present invention;

[0053] Figure 9 Schematic structural diagram during injection molding and material taking of the present invention;

[0054] Figure 10 Schematic structural diagram during the rotation of the turntable of the present invention.

[0055] In the figure: 1, injection molding machine frame; 11, fixed frame; 12, fixed plate; 2, rotating mechanism; 21, turntable; 22, slewing bearing; 23, motor; 24, gear three; 3, injection mold; 31, lower mold; 32, upper mold; 33, guide pillar; 4, work station; 41, injection molding work station; 42, waiting work station; 43, material taking work station; 44, preheating work station; 5, pressing plate; 51, cylinder; 52, orifice plate; 6, injection module; 61, injection head; 62, glue conveying pipe; 63, injection hole; 7, material taking mechanism; 71, swing arm; 72, chute; 73, slide pillar one; 74, lifting frame; 741, slide pillar two; 742, bottom plate; 743, lifting column; 744, limiting plate; 75, template opening one; 76, template opening two; 77, limiting block; 8, avoidance mechanism; 81, gear one; 82, gear two; 83, bevel gear three; 84, bevel gear two; 85, bevel gear one; 86, incomplete gear one; 87, incomplete gear two; 88, spring plate one; 89, return spring one; 810, rack; 811, guide rail; 812, guide groove; 813, spring plate two; 814, return spring two; 9, preheating module. Detailed implementation manners

[0056] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0057] Please refer to Figures 1-10 , the present invention provides a technical solution: a micro-pressure 3D forming injection molding device, including an injection molding machine frame 1, a fixed frame 11 is arranged at the upper end of the injection molding machine frame 1, a turntable 21 is rotatably installed in the middle of the upper end of the injection molding machine frame 1, and the turntable 21 is controlled to rotate intermittently through a rotating mechanism 2;

[0058] The rotating mechanism 2 includes a slewing bearing 22 installed at the upper end of the injection molding machine frame 1, the turntable 21 is installed at the upper end of the slewing bearing 22, a motor 23 is fixedly installed at the bottom of the injection molding machine frame 1, a gear three 24 is arranged at the output end of the motor 23, and the gear three 24 is meshed and connected with the slewing bearing 22.

[0059] Among them, the motor 23 drives the third gear 24 to rotate, so that the third gear 24 drives the slewing bearing 22 to rotate, enabling the turntable 21 installed on the slewing bearing 22 to rotate.

[0060] Four working stations 4 are evenly distributed near the outer diameter position at the upper end of the turntable 21. An injection mold 3 is provided at each working station 4. The injection mold 3 includes a lower mold 31 and an upper mold 32. Four guide posts 33 are provided near the four corner positions at the upper end of the lower mold 31. The upper mold 32 is slidably connected to the guide posts 33 up and down. The four working stations 4 are respectively an injection working station 41, a waiting working station 42, a material taking working station 43, and a preheating working station 44. A pressing plate 5 for pressing the upper mold 32 is provided above the injection working station 41. An injection head 61 for injecting the injection mold 3 is installed on the pressing plate 5. The pressing plate 5 is driven by a cylinder 51 to descend to press the upper mold 32. At the same time, the injection head 61 conveys a colloid through an injection module 6 to inject the injection mold 3. The injection module 6 is fixedly installed at the upper end of the fixing frame 11. The injection head 61 is connected to the injection module 6 through a glue conveying pipe 62. An injection hole 63 matching the injection head 61 is provided at the upper end of the upper mold 32. After the pressing plate 5 descends, the injection head 61 is inserted into the injection hole 63 to inject the injection mold 3.

[0061] The bottom of the lower mold 31 penetrates through the turntable 21 and extends below the turntable 21. A preheating module 9 for heating the injection mold 3 is fixedly installed at the upper end of the injection molding machine frame 1. The preheating module 9 is located below the preheating working station 44.

[0062] Among them, before injection molding, the injection mold 3 is first heated by the preheating module 9, so that the temperature of the colloid will not drop rapidly after entering the injection mold 3, enabling the colloid to have better fluidity inside the injection mold 3, improving the injection molding efficiency and product quality. The turntable 21 is rotated 90 degrees by the rotating mechanism 2, so that the preheated injection mold 3 on the preheating station 44 is rotated to the injection station 41. The pressing plate 5 is driven by the air cylinder 51 to descend and press down the upper mold 32 in the injection station 41, so that the upper mold 32 and the lower mold 31 have a qualified clamping force. Then, the injection module 6 injects the colloid into the injection mold 3 through the glue delivery pipe 62 and the injection head 61, enabling the colloid to be molded in the injection mold 3. After the injection is completed, the air cylinder 51 drives the pressing plate 5 to rise. Again, the turntable 21 is rotated 90 degrees by the rotating mechanism 2. The injection mold 3 that has completed injection on the injection station 41 is rotated to the waiting station 42 for a short cooling. The injection station 41 continues to inject the next injection mold 3. Again, the turntable 21 is rotated 90 degrees by the rotating mechanism 2. The injection mold 3 on the waiting station 42 is rotated to the material taking station 43. The injection station 41 continues to inject the next injection mold 3. When the air cylinder 51 drives the pressing plate 5 to descend and clamp the upper mold 32, the upper mold 32 in the material taking station 43 is controlled to be opened by the material taking mechanism 7. After the upper mold 32 is opened, the injection-molded product is exposed at the upper end of the lower mold 31. Finally, the product is taken out and inspected for quality.

[0063] The material taking mechanism 7 includes a swing arm 71. Sliding grooves 72 are provided near both ends of the swing arm 71. A fixed plate 12 is provided at the lower end of the fixed frame 11. The middle part of the swing arm 71 is rotatably installed on one side of the lower end of the fixed plate 12. A mouth-shaped plate 52 is provided in the middle of the upper end of the pressing plate 5. A first sliding column 73 is provided inside the mouth-shaped plate 52. The first sliding column 73 is movably connected to one of the sliding grooves 72.

[0064] The material taking mechanism 7 further includes a lifting frame 74 that is slidably connected to the fixed frame 11 up and down. The lifting frame 74 includes a bottom plate 742 at the bottom of the lifting frame 74 and a lifting column 743 at the upper end of the lifting frame 74. The lifting column 743 is slidably connected to the fixed frame 11 up and down. A limiting plate 744 for supporting and limiting the lifting frame 74 is provided at the upper end of the lifting column 743. A second sliding column 741 is provided inside the lifting frame 74. The second sliding column 741 is movably connected to the other sliding groove 72. An opening template one 75 and an opening template two 76 are installed at the bottom of the lifting frame 74. The opening template one 75 and the opening template two 76 are located on both sides of the lower mold 31. Limiting blocks 77 are provided on both sides of the upper mold 32. The opening template one 75 and the opening template two 76 rise to lift the two limiting blocks 77 to open the upper mold 32.

[0065] Among them, when the air cylinder 51 drives the pressing plate 5 to descend to press down the upper mold 32 at the injection molding station 41, the first sliding column 73 slides in the sliding groove 72 and drives one end of the swing arm 71 to descend. Since the middle of the swing arm 71 is rotatably connected to the fixed plate 12, the other end of the swing arm 71 rises, as Figure 9 , through the second sliding column 741, the lifting frame 74 rises, so that the first mold opening plate 75 and the second mold opening plate 76 installed at the lower end of the bottom plate 742 of the lifting frame 74 rise, so that the first mold opening plate 75 and the second mold opening plate 76 jack up the limit blocks 77 on both sides of the upper mold 32, so that the upper mold 32 rises and opens. At this time, the staff can take away the injection molded product. When the injection mold 3 at the injection molding station 41 is injection molded, on the contrary, the air cylinder 51 drives the pressing plate 5 to rise, so that the first mold opening plate 75 and the second mold opening plate 76 descend, so that the upper mold 32 at the material taking station 43 descends and fits on the lower mold 31.

[0066] When the turntable 21 rotates, the first mold opening plate 75 and the second mold opening plate 76 are controlled by the avoidance mechanism 8 to move away from the lower mold 31;

[0067] The avoidance mechanism 8 includes a first gear 81 rotatably installed at the upper end of the bottom plate 742 and two second gears 82. The first gear 81 is respectively meshed with the two second gears 82. A third bevel gear 83 is fixedly connected to the upper end of the first gear 81. A second bevel gear 84 is rotatably installed on the lifting frame 74. The second bevel gear 84 is meshed with the third bevel gear 83. A first bevel gear 85 is fixedly installed in the middle of the upper end of the turntable 21. The first bevel gear 85 is meshed with the second bevel gear 84. The speed ratio of the first bevel gear 85 to the second bevel gear 84 is 1:4. The lower ends of the two second gears 82 are both connected with an incomplete gear one 86 through a rotating shaft. The incomplete gear one 86 is located below the bottom plate 742. One end of the first mold opening plate 75 is provided with an incomplete gear two 87, and the incomplete gear two 87 is rotatably installed below the bottom plate 742. The incomplete gear two 87 is meshed with one of the incomplete gears one 86. One side of the bottom plate 742 is provided with a first spring plate 88. The first spring plate 88 and one side of the first mold opening plate 75 are connected through a first return spring 89. A rack 810 is provided on one side of the second mold opening plate 76. The rack 810 is meshed with the other incomplete gear one 86. A guide rail 811 is provided at the upper end of the second mold opening plate 76. A guide groove 812 is provided at the lower end of the bottom plate 742. The second mold opening plate 76 is slidably connected with the guide groove 812 through the guide rail 811. One side of the bottom plate 742 is provided with a second spring plate 813. The second spring plate 813 and one end of the second mold opening plate 76 are connected through a second return spring 814.

[0068] Among them, when the rotating mechanism 2 drives the turntable 21 to rotate, the injection mold 3 will rotate along with the turntable 21. The first template 75 and the second template 76 are located on both sides of the lower mold 31, so that the first template 75 and the second template 76 will interfere with the rotation of the injection mold 3. Therefore, when the turntable 21 rotates, the first template 75 and the second template 76 are moved away from the lower mold 31 through the avoidance mechanism 8 to prevent interference. Its working principle is as follows: As Figure 9 , when the turntable 21 rotates 90 degrees, the first bevel gear 85 rotates 90 degrees along with the turntable 21. Since the speed ratio of the first bevel gear 85 to the second bevel gear 84 is 1:4, when the second bevel gear 84 rotates one circle, the third bevel gear 83 and the first gear 81 rotate one circle, the two second gears 82 rotate one circle in the same direction, the two first incomplete gears 86 rotate one circle in the same direction, the second incomplete gear 87 rotates, the first template 75 rotates, and rotates in the same direction as the injection mold 3. When the first template 75 rotates to the position as shown in Figure 10 , the injection mold 3 no longer interferes with the first template 75. At this time, the first return spring 89 is stretched, and the injection mold 3 can continue to rotate and move to the preheating station 44. At this time, the meshing between the first incomplete gear 86 and the second incomplete gear 87 disappears, and the resilience of the first return spring 89 drives the first template 75 to return to the initial position. While the first template 75 rotates, the rack 810 on the second template 76 is driven by another first incomplete gear 86, so that the second template 76 slides in the guide groove 812, and the second template 76 moves towards the second return spring 814, compressing the second return spring 814. As shown in Figure 10 , at this time, the second template 76 also completely disengages from the lower mold 31. Therefore, the injection mold 3 on the waiting station 42 can rotate to the material taking station 43 without interference. When the first incomplete gear 86 and the rack 810 are disengaged and no longer meshed, the resilience of the second return spring 814 drives the second template 76 to return to the initial position. As shown in Figure 1 , at this time, the first template 75 and the second template 76 can still jack up the upper mold 32 and open the upper mold 32 when rising. In addition, when the lifting frame 74 rises, the second bevel gear 84 leaves the first bevel gear 85, and when the lifting frame 74 descends to the initial position, the second bevel gear 84 meshes with the first bevel gear 85 again.

[0069] A micro-pressure 3D forming injection process, which is used in conjunction with a micro-pressure 3D forming injection device, includes the following steps:

[0070] S1. Install four injection molds 3 on four stations 4 respectively, and turn on the preheating module 9 to heat the injection molds 3 on the preheating station 44;

[0071] S2. Drive the turntable 21 to rotate 90 degrees through the rotating mechanism 2, rotate the preheated injection mold 3 on the preheating station 44 to the injection station 41, drive the pressing plate 5 to descend through the air cylinder 51 and press down the upper mold 32 in the injection station 41, so that the upper mold 32 and the lower mold 31 have a qualified clamping force. Then, the injection module 6 injects the colloid into the injection mold 3 through the injection head 61, so that the colloid is molded in the injection mold 3. After the injection is completed, the air cylinder 51 drives the pressing plate 5 to rise;

[0072] S3. Drive the turntable 21 to rotate 90 degrees again through the rotating mechanism 2, rotate the injection mold 3 with the injection completed on the injection station 41 to the waiting station 42 for a short cooling, and the injection station 41 continues to inject the next injection mold 3;

[0073] S4. Drive the turntable 21 to rotate 90 degrees again through the rotating mechanism 2, rotate the injection mold 3 on the waiting station 42 to the material taking station 43, and the injection station 41 continues to inject the next injection mold 3. When the air cylinder 51 drives the pressing plate 5 to descend and clamp the upper mold 32, the upper mold 32 in the material taking station 43 is controlled to be opened by the material taking mechanism 7;

[0074] S5. After the upper mold 32 is opened, the injection-molded product is exposed at the upper end of the lower mold 31, and the product is taken out and inspected for quality.

[0075] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A micro-pressure 3D injection molding device, comprising an injection molding machine frame (1), and a fixed frame (11) is arranged at the upper end of the injection molding machine frame (1), characterized in that: In the middle of the upper end of the injection molding machine frame (1), a turntable (21) is rotatably installed, and the turntable (21) is controlled to rotate intermittently through a rotating mechanism (2); Four stations (4) are evenly distributed near the outer diameter position of the upper end of the turntable (21). An injection mold (3) is provided on each station (4), and the injection mold (3) includes a lower mold (31) and an upper mold (32); Among them, the four stations (4) are respectively an injection station (41), a waiting station (42), a material taking station (43) and a preheating station (44); Above the injection station (41), there is a pressing plate (5) for pressing the upper mold (32), and an injection head (61) for injecting the injection mold (3) is installed on the pressing plate (5); The pressing plate (5) is driven by a cylinder (51) to descend to press the upper mold (32), and at the same time, the injection head (61) conveys colloid through an injection module (6) to inject the injection mold (3); Among them, when the pressing plate (5) descends to press the upper mold (32), the upper mold (32) in the material taking station (43) is controlled to be opened by a material taking mechanism (7).

2. The micro-pressure 3D injection molding device according to claim 1, characterized in that: The material taking mechanism (7) includes a swing arm (71), and sliding grooves (72) are provided near both ends of the swing arm (71); A fixed plate (12) is provided at the lower end of the fixed frame (11), and the middle of the swing arm (71) is rotatably installed on one side of the lower end of the fixed plate (12); In the middle of the upper end of the pressing plate (5), there is a mouth-shaped plate (52), and a first sliding column (73) is provided inside the mouth-shaped plate (52), and the first sliding column (73) is movably connected to one of the sliding grooves (72); The material taking mechanism (7) further includes a lifting frame (74) that is slidably connected to the fixed frame (11) up and down. A second sliding column (741) is provided inside the lifting frame (74), and the second sliding column (741) is movably connected to the other sliding groove (72); A first mold opening plate (75) and a second mold opening plate (76) are installed at the bottom of the lifting frame (74). The first mold opening plate (75) and the second mold opening plate (76) are located on both sides of the lower mold (31), and limiting blocks (77) are provided on both sides of the upper mold (32); Among them, the first mold opening plate (75) and the second mold opening plate (76) rise to lift the two limiting blocks (77) to open the upper mold (32).

3. The micro-pressure 3D injection molding device according to claim 2, wherein: The lifting frame (74) includes a bottom plate (742) at the bottom of the lifting frame (74) and a lifting column (743) at the upper end of the lifting frame (74). The lifting column (743) is slidably connected to the fixed frame (11) up and down; A limiting plate (744) for supporting and limiting the lifting frame (74) is provided at the upper end of the lifting column (743).

4. A micro-pressure 3D injection molding device according to claim 3, characterized in that: When the turntable (21) rotates, the first mold opening plate (75) and the second mold opening plate (76) are controlled to move away from the lower mold (31) through an avoidance mechanism (8); Among them, the avoidance mechanism (8) includes a first gear (81) rotatably installed at the upper end of the bottom plate (742) and two second gears (82), and the first gear (81) is meshed with the two second gears (82) respectively; A third bevel gear (83) is fixedly connected to the upper end of the first gear (81). A second bevel gear (84) is rotatably mounted on the lifting frame (74). The second bevel gear (84) is meshed and connected with the third bevel gear (83). A first bevel gear (85) is fixedly installed in the middle of the upper end of the turntable (21). The first bevel gear (85) is meshed and connected with the second bevel gear (84). Two second gears (82) are each connected to an incomplete first gear (86) through a rotating shaft at the lower end. The incomplete first gear (86) is located below the bottom plate (742). One end of the first opening template (75) is provided with an incomplete second gear (87). The incomplete second gear (87) is rotatably mounted below the bottom plate (742). The incomplete second gear (87) is meshed and connected with one of the incomplete first gears (86). A first spring plate (88) is provided on one side of the bottom plate (742). The first spring plate (88) and one side of the first opening template (75) are connected through a first return spring (89). A rack (810) is provided on one side of the second opening template (76). The rack (810) is meshed and connected with the other incomplete first gear (86). A guide rail (811) is provided at the upper end of the second opening template (76). A guide groove (812) is provided at the lower end of the bottom plate (742). The second opening template (76) is slidably connected to the guide groove (812) through the guide rail (811). A second spring plate (813) is provided on one side of the bottom plate (742). The second spring plate (813) and one end of the second opening template (76) are connected through a second return spring (814).

5. A micro-pressure 3D forming injection molding device according to claim 4, characterized in that: The speed ratio of the first bevel gear (85) to the second bevel gear (84) is 1:

4.

6. A micro-pressure 3D forming injection molding device according to claim 1, characterized in that: The rotating mechanism (2) includes a slewing bearing (22) installed at the upper end of the injection molding machine frame (1). The turntable (21) is installed at the upper end of the slewing bearing (22). A motor (23) is fixedly installed at the bottom of the injection molding machine frame (1). A third gear (24) is provided at the output end of the motor (23). The third gear (24) is meshed and connected with the slewing bearing (22).

7. A micro-pressure 3D injection molding device according to claim 1, characterized in that: The bottom of the lower mold (31) penetrates through the turntable (21) and extends below the turntable (21). A preheating module (9) for heating the injection molding die (3) is fixedly installed at the upper end of the injection molding machine frame (1). The preheating module (9) is located below the preheating station (44).

8. A micro-pressure 3D forming injection molding device according to claim 1, characterized in that: The injection molding module (6) is fixedly installed at the upper end of the fixed frame (11). The injection head (61) is connected to the injection molding module (6) through a glue delivery pipe (62). An injection hole (63) matching the injection head (61) is provided at the upper end of the upper mold (32). After the pressing plate (5) descends, the injection head (61) is inserted into the injection hole (63) to inject plastic into the injection molding die (3).

9. The micro-pressure 3D injection molding device according to claim 1, characterized in that: Four guide posts (33) are provided at the upper end of the lower mold (31) near the four corner positions. The upper mold (32) is slidably connected to the guide posts (33) up and down.

10. A micro-pressure 3D injection molding process, which is used in conjunction with a micro-pressure 3D injection molding device according to claim 7, characterized in that Including the following steps: S1. Install four injection molding dies (3) on four workstations (4) respectively. Turn on the preheating module (9) to heat the injection molding dies (3) at the preheating station (44). S2. Drive the turntable (21) to rotate 90 degrees through the rotating mechanism (2), rotate the preheated injection mold (3) on the preheating station (44) to the position of the injection station (41), drive the pressure plate (5) to descend through the air cylinder (51) and press down the upper mold (32) in the injection station (41) so that the upper mold (32) and the lower mold (31) have a qualified clamping force. Then, the injection module (6) injects the colloid into the injection mold (3) through the injection head (61) to make the colloid form in the injection mold (3). After injection is completed, the air cylinder (51) drives the pressure plate (5) to rise; S3. Again, drive the turntable (21) to rotate 90 degrees through the rotating mechanism (2), rotate the injection mold (3) with injection completed on the injection station (41) to the waiting station (42) for a short cooling, and the injection station (41) continues to inject the next injection mold (3); S4. Again, drive the turntable (21) to rotate 90 degrees through the rotating mechanism (2), rotate the injection mold (3) on the waiting station (42) to the material taking station (43), and the injection station (41) continues to inject the next injection mold (3). When the air cylinder (51) drives the pressure plate (5) to descend and press the upper mold (32) tightly, the upper mold (32) in the material taking station (43) is controlled to be opened by the material taking mechanism (7); S5. After the upper mold (32) is opened, the injection - molded product is exposed at the upper end of the lower mold (31). Take out the product and conduct quality inspection.

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