Injection mold and packaging box molding method based on EPP material

Abstract

The invention discloses an injection mold and a packaging box forming method based on EPP material, which relates to the technical field of injection molds, comprising: a base plate, an injection molding machine is fixedly arranged on the top of the base plate, a material transportation port is opened inside the injection molding machine, and the characteristics are: a plastic part pushing mechanism is arranged on the injection molding machine, the plastic part pushing mechanism can transport the stacked plastic parts downward in sequence, the pushing mechanism comprises an active gear, and an upper conveying pipe is fixedly arranged inside the material transportation port; a conveying mechanism is arranged on the top of the base plate, and a plurality of plastic part storage mechanisms are arranged above the conveying mechanisms, the plastic part storage mechanisms comprise a storage box and a plurality of receiving box groups, and the receiving box groups comprise a plurality of receiving boxes: the problems in the prior art that in the process of plastic parts being introduced into a storage container, the plastic parts contact each other, collision and disordered stacking occur, and when the storage container reaches its upper capacity limit, manual operation is required to replace a new empty storage container.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection mold and a packaging box molding method based on EPP materials. Background Art

[0002] Injection molds inject heated molten plastic into the mold cavity, and obtain the finished product after cooling and solidification. They are widely used in the production of plastic parts and products, and are particularly suitable for mass production of products with complex geometric shapes and high precision requirements, such as automotive parts, electronic housings, home appliances, toys, etc.

[0003] After the existing injection mold completes the demoulding process of the plastic part, the plastic part is immediately introduced into an inclined slide rail system. In this system, the plastic part slides smoothly along the guide surface of the inner wall of the slide rail under the natural drive of gravity until it reaches the preset exit position at the end of the slide rail. Then, the plastic part falls from the exit into a pre-configured storage container for subsequent processing or inventory storage operations.

[0004] Defects of the prior art: In the process of plastic parts being introduced into the storage container, collision, extrusion and disordered stacking may occur due to the mutual contact between the plastic parts, which in turn causes uneven distribution of the plastic parts in the container, specifically manifested as misaligned stacking and local dense accumulation. This uneven arrangement not only increases the difficulty of subsequently removing the plastic parts from the container, but may also have a potential impact on the surface quality of the plastic parts. When the storage container reaches its capacity limit, that is, the internal plastic parts are fully loaded, it is necessary to rely on manual operation to replace a new empty storage container in order to continue to store the subsequently produced plastic parts, which consumes labor costs.

[0005] Therefore, the present application provides an injection mold and a packaging box molding method based on EPP material to meet the needs. Summary of the invention

[0006] The purpose of the present application is to provide an injection mold and a packaging box molding method based on EPP material, which solves the problems in the prior art that in the process of plastic parts being introduced into storage containers, plastic parts come into contact with each other, collide and stack in a disorderly manner, and when the storage container reaches its upper capacity limit, manual operation is required to replace it with a new empty storage container.

[0007] In order to solve the above problems, the present application provides the following technical solutions: an injection mold, comprising: a bottom plate, an injection molding machine is fixedly arranged on the top of the bottom plate, a material transport port is opened inside the injection molding machine, a plastic part pushing mechanism is arranged on the injection molding machine, the plastic part pushing mechanism can transport the stacked plastic parts downward in sequence, the pushing mechanism includes a driving gear, and an upper conveying pipe is fixedly arranged inside the material transport port; a conveying mechanism is arranged on the top of the bottom plate, a plurality of plastic part storage mechanisms are arranged above the conveying mechanism, the plastic part storage mechanisms include a storage box, a plurality of receiving box groups, the receiving box groups include a plurality of receiving boxes, a driving mechanism is arranged on the top of the bottom plate, a first lower conveying pipe, a second lower conveying pipe, a first lower conveying pipe and a second lower conveying pipe are slidably arranged above the driving mechanism. There are three lower conveying tubes, and the outlets of the first lower conveying tube, the second lower conveying tube, and the third lower conveying tube are all facing the corresponding receiving box group. The driving mechanism can make the first lower conveying tube, the second lower conveying tube, and the third lower conveying tube dock with the outlet of the upper conveying tube in sequence. A fixed gear is correspondingly arranged on the rear side of the receiving box group. The driving mechanism includes a moving gear, and the moving gear can move to engage with different fixed gears respectively; the top of the bottom plate is also provided with a first transmission mechanism and a second transmission mechanism, and the plastic part pushing mechanism can drive the conveying mechanism to operate indirectly through the first transmission mechanism and the second transmission mechanism; the first transmission mechanism includes an incomplete gear, and the teeth of the incomplete gear can be engaged with the synchronous gear after rotating to the specified position.

[0008] Preferably, the plastic part pushing mechanism includes a retention frame fixedly arranged inside the material transport port, the interior of the retention frame is fixedly connected with a guide plate, the front side of the retention frame is connected with an upper conveying pipe inclined downward, a servo motor is fixedly arranged on the top of the bottom plate and at a position behind the injection molding machine, the output end of the servo motor is fixedly connected with a movable disk, the output end of the servo motor is fixedly sleeved with a driving gear, the driving gear is below the movable disk, a slider is slidably connected inside the retention frame, one end of the slider passes through the side wall of the retention frame and is fixedly connected with a push plate, a displacement opening is opened on the side wall of the retention frame, and the size of the displacement opening is adapted to the movement trajectory of the slider, the slider passes through the displacement opening, a plate body is fixedly connected to the side of the retention frame, a guide column is fixedly connected to the rear side of the plate body, the slider slidably passes through the guide column, a connecting rod is rotatably connected between the top of the slider and the top of the movable disk, and the movable disk and the connecting rod are eccentrically arranged.

[0009] Preferably, multiple plastic parts storage mechanisms are equidistantly distributed on the conveying mechanism in a linear array manner, the driving mechanism is located between the injection molding machine and the conveying mechanism, the first lower conveying tube and the second lower conveying tube are respectively located on both sides of the third lower conveying tube, the first lower conveying tube, the second lower conveying tube and the third lower conveying tube are all hollow and open at both ends, the outlets of the first lower conveying tube, the second lower conveying tube and the third lower conveying tube face different directions, the driving mechanism can drive the first lower conveying tube, the second lower conveying tube and the third lower conveying tube to move, and the driving mechanism can drive the storage box to move forward, so that each receiving box can be docked with one of the openings of the first lower conveying tube, the second lower conveying tube and the third lower conveying tube.

[0010] Preferably, the driving mechanism includes two symmetrically arranged fixed plates, the bottom of the fixed plate is fixedly connected to the top of the base plate, a first screw rod and a second screw rod are rotatably connected between the two fixed plates, the outer side of the first screw rod is threadedly connected to a threaded block, the top of the threaded block is fixedly connected to a movable plate, a front side of the movable plate is fixedly connected to a plurality of rod bodies, the first lower conveying tube, the second lower conveying tube, and the third lower conveying tube are fixedly connected to the corresponding rod bodies, the outer side of the second screw rod is threadedly connected to a displacement block, a brushless DC motor is fixedly installed on the top of the displacement block, the output end of the brushless DC motor is fixedly connected to a moving gear, one end of the first screw rod and the second screw rod both pass through the corresponding fixed plate, the end of the first screw rod is fixedly connected to the first gear, the end of the second screw rod is fixedly connected to the second gear, and the first gear is meshingly connected to the second gear.

[0011] Preferably, the plastic parts storage mechanism includes a storage box placed on the conveying mechanism, a plurality of receiving box groups are equidistantly distributed laterally inside the storage box, the receiving box group includes a plurality of receiving boxes equidistantly arranged longitudinally, two movable blocks are symmetrically fixedly connected to the side of the receiving box, a plurality of threaded rods are rotatably connected inside the storage box, a plurality of guide rods are fixedly connected inside the storage box, one of the movable blocks of the receiving box is threadedly connected to the outside of the corresponding threaded rod, and the other movable block of the receiving box slides through the corresponding guide rod, a notch is provided on the rear side of the storage box for the receiving box group and the movable block to pass through, and the end of the threaded rod close to the injection molding machine passes through the side wall of the storage box and is fixedly connected to the fixed gear.

[0012] Preferably, the conveying mechanism includes two baffles arranged in parallel, the bottom end of the baffle is fixedly connected to a support block, the support block is fixedly arranged on the top of the bottom plate, a plurality of rotating rods are rotatably connected between the two baffles, a conveyor belt is arranged between the two baffles, the plurality of rotating rods are located inside the conveyor belt, and the plurality of rotating rods are cooperatively connected to the conveyor belt, and an extension rod is fixedly connected to the end of one of the rotating rods.

[0013] Preferably, the first transmission mechanism includes a second fixed shaft, a first fixed shaft, and a third fixed shaft rotatably connected to the top of the base plate, the outer side of the second fixed shaft is fixedly sleeved with a reduction gear and an incomplete gear, the reduction gear is above the incomplete gear, and the reduction gear is meshingly connected with the driving gear, the top of the first fixed shaft is fixedly connected with a synchronous gear, and the outer side of the third fixed shaft is fixedly sleeved with a speed-up gear and a first pulley in sequence from top to bottom, the speed-up gear is meshingly connected with the synchronous gear, and the speed-up gear can drive the rotating rod to accelerate rotation through the second transmission mechanism.

[0014] Preferably, the second transmission mechanism includes a fourth fixed shaft rotatably connected to the top of the base plate, and the outer side of the fourth fixed shaft is fixedly sleeved with a second pulley and a driving bevel gear in sequence from top to bottom, and a belt is transmission-connected between the second pulley and the first pulley, and the conveying mechanism includes an extension rod, and the end of the extension rod is fixedly connected to a driven bevel gear, and the driven bevel gear is meshingly connected to the driving bevel gear.

[0015] Preferably, the injection molding machine is provided with a male mold, a female mold, and a mold opening mechanism.

[0016] The packaging box forming method based on EPP material comprises the following steps: filling EPP particles into a mold cavity through a feed port of a mold, sealing the mold, and heating the mold to soften and foam the EPP particles at high temperature, and controlling the heating temperature and pressure to fully expand the EPP particles in the mold and fit the mold shape, and after preliminary forming, cooling the mold to solidify and shape the EPP material, and after cooling and shaping, separating the movable mold and the fixed mold through the mold opening mechanism of the mold.

[0017] In summary, the technical effects and advantages of the present invention are as follows:

[0018] In the present invention, the movable disk drives the connecting rod and the slider to reciprocate through the drive of the servo motor, thereby pushing the push plate to send the plastic parts out of the upper conveying tube one by one. In this process, the push plate is not only responsible for pushing the plastic parts to the conveying tube, but also blocks the plastic parts above from falling during the return journey, thereby realizing the one-by-one conveying of the plastic parts, avoiding collision and stacking caused by simultaneous falling; when the plastic parts enter the lower conveying tube system, the driving mechanism starts to work. Through the mutual cooperation of the driving mechanism and the plastic parts storage mechanism, the first lower conveying tube, the second lower conveying tube and the third lower conveying tube can be docked with the upper conveying tube in turn, and the outlets of the three lower conveying tubes face different directions, corresponding to different receiving box groups in the plastic parts storage mechanism, which not only ensures that the plastic parts can enter the receiving box in an orderly manner, but also realizes the partitioned storage of the plastic parts in the storage box through the changing outlet direction, further avoiding stacking and collision.

[0019] In the present invention, through the cooperation of the first transmission mechanism and the second transmission mechanism, the conveying mechanism realizes intermittent operation. The last plastic part enters the corresponding receiving box. During the return stroke of the push plate, the incomplete gear can engage with the synchronous gear. The conveying mechanism can only operate after the plastic part pushing mechanism completes a series of actions, and can start in time and quickly convey the used plastic part storage mechanism to the designated position, and prepare to receive the next round of plastic parts.

[0020] 3. In the present invention, after the plastic parts are separated from the mold under the action of the ejection mechanism, they fall into the retention frame. The retention frame is equipped with a guide plate so that the plastic parts can be arranged in a predetermined order, avoiding disordered stacking in the initial stage and ensuring that the plastic parts have been preliminarily sorted before entering the conveying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the driving mechanism of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the plastic part pushing mechanism of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the plastic parts storage mechanism and the driving mechanism of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the driving mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the back structure of the plastic parts storage mechanism of the present invention;

[0029] Figure 8 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0030] Fig. 9 It is a schematic diagram of the bottom structure of the incomplete gear of the present invention;

[0031] Fig.10 For the present invention Figure 8Schematic diagram of the enlarged structure of the second transmission mechanism.

[0032] In the figure: 1, bottom plate; 2, injection molding machine; 21, material transport port; 3, conveying mechanism; 31, baffle; 32, conveyor belt; 33, extension rod; 4, plastic parts pushing mechanism; 41, retention frame; 42, guide plate; 43, guide column; 44, slider; 45, push plate; 46, connecting rod; 47, movable plate; 48, driving gear; 49, servo motor; 5, driving mechanism; 51, fixed plate; 52, driving motor; 53, moving plate; 531, threaded block; 54, first screw rod; 55, second screw rod; 56, first gear; 57, second gear; 58, displacement block; 59, brushless DC motor; 591, moving gear; 6, Plastic parts storage mechanism; 61, storage box; 62, receiving box group; 621, movable block; 63, threaded rod; 631, fixed gear; 64, guide rod; 7, second transmission mechanism; 71, driven bevel gear; 72, fourth fixed shaft; 73, driving bevel gear; 74, second pulley; 75, belt; 76, first pulley; 8, first transmission mechanism; 81, second fixed shaft; 82, incomplete gear; 83, reduction gear; 84, first fixed shaft; 85, synchronous gear; 86, third fixed shaft; 87, speed-up gear; 9, upper conveying pipe; 10, first lower conveying pipe; 11, second lower conveying pipe; 12, third lower conveying pipe. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example: Reference Figure 1-Figure 10 The injection mold shown comprises: a base plate 1, an injection molding machine 2 is fixedly arranged on the top of the base plate 1, a male mold and a female mold are arranged on the injection molding machine 2, and a mold opening mechanism is also arranged on the injection molding machine 2, and a power device provides power for the male mold.

[0035] The movable mold and the concave mold together form a closed cavity, in which the material is cooled and solidified. When the material is completely solidified, the movable mold is separated from the fixed mold, and an ejection mechanism such as an ejector pin is used to eject the molded product plastic part from the mold. The above-mentioned method of extruding the material is a prior art.

[0036] A material transport port 21 is provided inside the injection molding machine 2, and the material transport port 21 is connected to the outside of the injection molding machine 2, and the position of the material transport port 21 corresponds to the position where the plastic parts fall. A plastic part pushing mechanism 4 is provided on the injection molding machine 2, and the plastic part pushing mechanism 4 can transport the stacked plastic parts downward in sequence. The plastic part pushing mechanism 4 includes a retention frame 41 fixedly arranged inside the material transport port 21, and a guide plate 42 is fixedly connected to the interior of the retention frame 41. After the plastic parts fall into the interior of the retention frame 41, they can enter the front side of the interior of the retention frame 41 through the guiding effect of the guide plate 42. The front side of the retention frame 41 is connected to an upper conveying pipe 9 inclined downward, and a servo motor 49 is fixedly provided on the top of the bottom plate 1 and at a position behind the injection molding machine 2, and a movable disk is fixedly connected to the output end of the servo motor 49 47, the output end of the servo motor 49 is fixedly sleeved with a driving gear 48, and the driving gear 48 is located below the movable disk 47. A slider 44 is slidably connected to the interior of the retention frame 41, and one end of the slider 44 penetrates the side wall of the retention frame 41 and is fixedly connected to a push plate 45. The push plate 45 is used to push the plastic part from the interior of the retention frame 41 to the interior of the upper conveying pipe 9. A displacement opening is provided on the side wall of the retention frame 41, and the size of the displacement opening is adapted to the movement trajectory of the slider 44. The slider 44 penetrates the displacement opening, and a plate body is fixedly connected to the side of the retention frame 41, and a guide column 43 is fixedly connected to the rear side of the plate body. The slider 44 slides through the guide column 43, and a connecting rod 46 is rotatably connected between the top of the slider 44 and the top of the movable disk 47, and the movable disk 47 and the connecting rod 46 are eccentrically arranged.

[0037] In a mold opening process, after the ejection mechanism ejects the molded product from the mold, all the plastic parts fall into the interior of the retention frame 41 and enter the front side of the retention frame 41 through the guiding effect of the guide plate 42. All the plastic parts are stacked in order from high to low. The servo motor 49 is started, and the output end of the servo motor 49 drives the movable disk 47 to rotate, and the movable disk 47 drives the connecting rod 46 to rotate. The connecting rod 46 drives the slider 44 and the push plate 45 to reciprocate along the length direction of the guide column 43 as a whole. The push plate 45 moves forward. During the process, the push plate 45 pushes the plastic part at the bottom to move forward, pushes the plastic part into the upper conveying tube 9, and allows the plastic part to be transported downward. The push plate 45 then returns, and during the return process, it blocks the plastic part above it from falling. As the servo motor 49 continues to run, the push plate 45 is reset. At this time, all plastic parts that are not blocked by the push plate 45 move downward. The push plate 45 moves forward again to push the next plastic part into the upper conveying tube 9. In this way, the subsequent plastic parts can be transported to the interior of the upper conveying tube 9 in sequence.

[0038] A conveying mechanism 3 is arranged on the top of the bottom plate 1, and a plurality of plastic parts storage mechanisms 6 (only one is shown in the figure) are arranged above the conveying mechanism 3. The plurality of plastic parts storage mechanisms 6 are evenly distributed on the conveying mechanism 3 in a linear array. The plastic parts storage mechanism 6 includes a storage box 61 and a plurality of receiving box groups 62. A driving mechanism 5 is arranged on the top of the bottom plate 1. The driving mechanism 5 is located between the injection molding machine 2 and the conveying mechanism 3. A first lower conveying tube 10, a second lower conveying tube 11, and a third lower conveying tube 12 are slidably arranged above the driving mechanism 5. The first lower conveying tube 10 and the second lower conveying tube 11 are respectively located on both sides of the third lower conveying tube 12. The first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12 are all hollow and open at both ends. The outlets of the first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12 are all facing the corresponding receiving box group 62. The receiving box group 62 includes a plurality of receiving boxes. The driving mechanism 5 can drive the first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12 to move, so that the first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12 are connected with the outlet of the upper conveying tube 9 in sequence, so that the plastic parts can be transported downward to the corresponding storage box 61 through the first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12, and the driving mechanism 5 can drive the storage box 61 to move forward, so that each receiving box can be connected with one of the openings of the first lower conveying tube 10, the second lower conveying tube 11, and the third lower conveying tube 12.

[0039] The driving mechanism 5 includes two symmetrically arranged fixed plates 51, the bottom of the fixed plates 51 is fixedly connected to the top of the bottom plate 1, a first screw rod 54 and a second screw rod 55 are rotatably connected between the two fixed plates 51, a threaded block 531 is threadedly connected to the outer side of the first screw rod 54, a movable plate 53 is fixedly connected to the top of the threaded block 531, a plurality of rod bodies are fixedly connected to the front side of the movable plate 53, a first lower conveying tube 10, a second lower conveying tube 11, and a third lower conveying tube 12 are fixedly connected to the corresponding rod bodies, so that the first lower conveying tube 10, the second lower conveying tube 11, the third lower conveying tube 12, the movable plate 53 53. The threaded block 531 forms an integral whole. The outer side of the second screw rod 55 is threadedly connected to the displacement block 58. A brushless DC motor 59 is fixedly installed on the top of the displacement block 58. The output end of the brushless DC motor 59 will not self-lock when the power is off. The output end of the brushless DC motor 59 is fixedly connected to a moving gear 591. One end of the first screw rod 54 and the second screw rod 55 passes through the corresponding fixed plate 51. The end of the first screw rod 54 is fixedly connected to the first gear 56, and the end of the second screw rod 55 is fixedly connected to the second gear 57. The first gear 56 is meshed with the second gear 57.

[0040] The plastic parts storage mechanism 6 includes a storage box 61 placed on the conveying mechanism 3, and a plurality of receiving box groups 62 are equidistantly distributed laterally inside the storage box 61. The receiving box group 62 includes a plurality of receiving boxes equidistantly arranged longitudinally. Two movable blocks 621 are symmetrically fixedly connected to the side of the receiving box. A plurality of threaded rods 63 are rotatably connected inside the storage box 61. A plurality of guide rods 64 are fixedly connected inside the storage box 61. One of the movable blocks 621 of the receiving box is threadedly connected to the outer side of the corresponding threaded rod 63, and another movable block 621 of the receiving box slides through the corresponding guide rod 64. A notch is provided on the rear side of the storage box 61 for the receiving box group 62 and the movable block 621 to pass through. The end of the threaded rod 63 close to the injection molding machine 2 passes through the side wall of the storage box 61 and is fixedly connected to a fixed gear 631. The fixed gear 631 is meshedly connected to the moving gear 591. During one mold opening process, the number of falling plastic parts is the same as the number of receiving boxes, ensuring that each falling plastic part is caught by a corresponding receiving box, that is, the left side, middle and right side of the storage box 61 are all filled with plastic parts.

[0041] In the initial state, the second lower conveying tube 11 is docked with the upper conveying tube 9, and the moving gear 591 is meshed with the fixed gear 631 on the left. One of the receiving boxes of the left receiving box group 62 is located directly below the outlet of the second lower conveying tube 11. The purpose is to first fill the left side of the storage box 61 with plastic parts. The first plastic part falls into the corresponding receiving box through the outlets of the upper conveying tube 9 and the second lower conveying tube 11 in turn. The brushless DC motor 59 is started, and the output end of the brushless DC motor 59 drives the moving gear 591 to rotate, and the moving gear 591 drives the fixed gear 631 to rotate, and the fixed gear 631 drives the corresponding threaded rod 63 to rotate, so that the corresponding receiving box group 62 moves forward a specified distance until the next receiving box in the same receiving box group 62 is located directly below the outlet of the second lower conveying tube 11, and the second plastic part falls into the corresponding receiving box through the outlets of the upper conveying tube 9 and the second lower conveying tube 11 in sequence under the action of the plastic part pushing mechanism 4. In this way, all the receiving boxes of the left receiving box group 62 can be filled with plastic parts; start the drive motor 52, the output end of the drive motor 52 drives the first screw rod 54 to rotate, the first screw rod 54 drives the first gear 56 to rotate, the first gear 56 drives the second gear 57 to rotate, the second gear 57 drives the second screw rod 55 to rotate, and the rotation direction of the first screw rod 54 and the second screw rod 55 is In the opposite direction, the first lower conveying tube 10, the second lower conveying tube 11, the third lower conveying tube 12, the moving plate 53, and the threaded block 531 are moved to the left as a whole until the third lower conveying tube 12 is docked with the upper conveying tube 9. At the same time, the displacement block 58, the brushless DC motor 59, and the moving gear 591 are moved to the right as a whole until the moving gear 591 is meshed and connected with the fixed gear 631 in the middle of the storage box 61 (the starting process of the drive motor 52 occurs during the return process of the push plate 45 to ensure that no plastic parts fall during this process). Under the action of the plastic part pushing mechanism 4, the third plastic part falls into the corresponding receiving box through the outlets of the upper conveying tube 9 and the third lower conveying tube 12 in sequence. Inside, according to the above method, all the receiving boxes of the middle receiving box group 62 can be filled with plastic parts; then the drive motor 52 is started to allow the first lower conveying tube 10 to dock with the upper conveying tube 9, and according to the above method, all the receiving boxes of the right receiving box group 62 can be filled with plastic parts. At this time, the left side, the middle and the right side of the storage box 61 are filled with plastic parts in sequence, and the drive motor 52 is started, and the output end of the drive motor 52 rotates in the opposite direction to allow the first lower conveying tube 10, the second lower conveying tube 11, the third lower conveying tube 12, and the brushless DC motor 59 to return to their initial state positions, and then the conveying mechanism 3 is operated to allow the next plastic part storage mechanism 6 to move to the designated material receiving position.

[0042] The conveying mechanism 3 includes two parallel baffles 31, the bottom ends of the baffles 31 are fixedly connected with a support block, the support block is fixedly arranged on the top of the bottom plate 1, a plurality of rotating rods are rotatably connected between the two baffles 31, a conveyor belt 32 is arranged between the two baffles 31, a plurality of rotating rods are located on the inner side of the conveyor belt 32, and a plurality of rotating rods are cooperatively connected with the conveyor belt 32, and an extension rod 33 is fixedly connected to the end of one of the rotating rods; a first transmission mechanism 8 and a second transmission mechanism 7 are also arranged on the top of the bottom plate 1, and the plastic part pushing mechanism 4 can drive the conveying mechanism 3 to operate indirectly through the first transmission mechanism 8 and the second transmission mechanism 7.

[0043] The first transmission mechanism 8 includes a second fixed shaft 81, a first fixed shaft 84, and a third fixed shaft 86 which are rotatably connected to the top of the bottom plate 1. A reduction gear 83 and an incomplete gear 82 are fixedly sleeved on the outer side of the second fixed shaft 81. The outer ring of the incomplete gear 82 has only a small number of teeth. The reduction gear 83 is located above the incomplete gear 82, and the reduction gear 83 is meshed with the driving gear 48. The number of teeth of the reduction gear 83 is greater than the number of teeth of the driving gear 48. When the driving gear 48 rotates one circle, the driving gear 48 will drive the reduction gear 83 to rotate a number of circles less than the number of circles it rotates, thereby The purpose of deceleration is achieved. The top of the first fixed shaft 84 is fixedly connected with a synchronous gear 85. After the teeth of the incomplete gear 82 rotate to a specified position, it can be meshed with the synchronous gear 85. When the incomplete gear 82 makes a continuous rotation motion, the synchronous gear 85 makes an intermittent rotation motion. The outer side of the third fixed shaft 86 is fixedly sleeved with a speed-up gear 87 and a first pulley 76 in sequence from top to bottom. The speed-up gear 87 is meshed with the synchronous gear 85. The number of teeth of the speed-up gear 87 is less than that of the synchronous gear 85. The speed-up gear 87 can drive the rotating rod to accelerate through the second transmission mechanism 7.

[0044] The second transmission mechanism 7 includes a fourth fixed shaft 72 rotatably connected to the top of the base plate 1, and the outer side of the fourth fixed shaft 72 is fixedly sleeved with a second pulley 74 and a driving bevel gear 73 in sequence from top to bottom. A belt 75 is transmission-connected between the second pulley 74 and the first pulley 76, and the end of the extension rod 33 is fixedly connected to a driven bevel gear 71, which is meshingly connected to the driving bevel gear 73.

[0045] The push plate 45 reciprocates for several times (the number of reciprocating motions is determined by the amount of material unloaded at one time by the injection molding machine 2), and the conveying mechanism 3 operates once accordingly: the servo motor 49 is started, and the output end of the servo motor 49 drives the movable disk 47 and the driving gear 48 to operate simultaneously, so that the movable disk 47 can reciprocate for several times (after the movable disk 47 moves forward to push the plastic part into the upper conveying tube 9, the movable disk 47 can retreat to realize the return stroke after the plastic part enters the receiving box of the corresponding receiving box group 62), and at the same time, the driving gear 48 drives the reduction gear 83 to rotate, and the reduction gear 83 drives the incomplete gear 82 and the second fixed shaft 81 to rotate as a whole. Only when the push plate 45 pushes the last plastic part into the upper conveying tube 9, the last plastic part enters the corresponding receiving box, and the push plate 45 returns, the incomplete gear 82 and the second fixed shaft 81 rotate as a whole. Only the full gear 82 can mesh with the synchronous gear 85, and the two do not mesh in the rest of the process. The incomplete gear 82 drives the synchronous gear 85 to rotate, and the synchronous gear 85 drives the speed-up gear 87 to rotate quickly. The speed-up gear 87 drives the third fixed shaft 86 and the first pulley 76 to rotate quickly as a whole. The first pulley 76 drives the second pulley 74 to rotate quickly through the belt 75. The second pulley 74 drives the fourth fixed shaft 72 and the active bevel gear 73 to rotate quickly as a whole. The active bevel gear 73 drives the corresponding rotating rod to rotate quickly by meshing with the driven bevel gear 71, so that the conveyor belt 32 is transmitted quickly, and the used plastic parts storage mechanism 6 is transported to the designated position to wait for the staff to pick it up, and the next unused plastic parts storage mechanism 6 is transported to the material receiving position to prepare to receive the next round of plastic parts.

[0046] The packaging box forming method based on EPP material comprises the following steps: filling EPP particles into a mold cavity through a feed port of a mold, sealing the mold, and heating the mold to soften and foam the EPP particles at high temperature, and controlling the heating temperature and pressure to fully expand the EPP particles in the mold and fit the mold shape, and after preliminary forming, cooling the mold to solidify and shape the EPP material, and after cooling and shaping, separating the movable mold and the fixed mold through the mold opening mechanism of the mold.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold, comprising: A bottom plate, an injection molding machine is fixedly arranged on the top of the bottom plate, a material transport port is opened inside the injection molding machine, and the characteristics are: a plastic part pushing mechanism is arranged on the injection molding machine, the plastic part pushing mechanism can transport the stacked plastic parts downward in sequence, the pushing mechanism includes a driving gear, and an upper conveying pipe is fixedly arranged inside the material transport port; a conveying mechanism is arranged on the top of the bottom plate, a plurality of plastic part storage mechanisms are arranged above the conveying mechanism, the plastic part storage mechanism includes a storage box, a plurality of receiving box groups, the receiving box group includes a plurality of receiving boxes, a driving mechanism is arranged on the top of the bottom plate, a first lower conveying pipe, a second lower conveying pipe, and a third lower conveying pipe are slidably arranged above the driving mechanism, the first lower conveying pipe The outlets of the first lower conveying tube, the second lower conveying tube, and the third lower conveying tube are all oriented toward the corresponding receiving box group. The driving mechanism can make the first lower conveying tube, the second lower conveying tube, and the third lower conveying tube dock with the outlet of the upper conveying tube in sequence. A fixed gear is correspondingly arranged on the rear side of the receiving box group. The driving mechanism includes a moving gear, and the moving gear can move to mesh with different fixed gears respectively; the top of the bottom plate is also provided with a first transmission mechanism and a second transmission mechanism, and the plastic part pushing mechanism can drive the conveying mechanism to operate indirectly through the first transmission mechanism and the second transmission mechanism; the first transmission mechanism includes an incomplete gear, and the teeth of the incomplete gear can be meshed and connected with the synchronous gear after rotating to a specified position; The plastic parts pushing mechanism includes a retention frame fixedly arranged inside the material transport port, a guide plate is fixedly connected inside the retention frame, an upper conveying pipe inclined downward is connected to the front side of the retention frame, a servo motor is fixedly arranged at the top of the bottom plate and at a position behind the injection molding machine, a movable disk is fixedly connected to the output end of the servo motor, a driving gear is fixedly sleeved on the output end of the servo motor, and the driving gear is located below the movable disk, a slider is slidably connected inside the retention frame, one end of the slider passes through the side wall of the retention frame and is fixedly connected to a push plate, a displacement opening is provided on the side wall of the retention frame, and the size of the displacement opening is adapted to the motion trajectory of the slider, the slider passes through the displacement opening, a plate body is fixedly connected to the side of the retention frame, a guide column is fixedly connected to the rear side of the plate body, the slider slides through the guide column, a connecting rod is rotatably connected between the top of the slider and the top of the movable disk, and the movable disk and the connecting rod are eccentrically arranged; The driving mechanism includes two symmetrically arranged fixed plates, the bottom of the fixed plate is fixedly connected to the top of the base plate, a first screw rod and a second screw rod are rotatably connected between the two fixed plates, the outer side of the first screw rod is threadedly connected to a threaded block, the top of the threaded block is fixedly connected to a movable plate, a front side of the movable plate is fixedly connected to a plurality of rod bodies, a first lower conveying tube, a second lower conveying tube, and a third lower conveying tube are fixedly connected to the corresponding rod bodies, the outer side of the second screw rod is threadedly connected to a displacement block, a brushless DC motor is fixedly installed on the top of the displacement block, an output end of the brushless DC motor is fixedly connected to a moving gear, one end of the first screw rod and the second screw rod both pass through the corresponding fixed plate, an end of the first screw rod is fixedly connected to a first gear, an end of the second screw rod is fixedly connected to a second gear, and the first gear is meshingly connected to the second gear.

2. An injection mold according to claim 1, characterized in that: A plurality of plastic parts storage mechanisms are distributed on the conveying mechanism in a linear array at equal distances, the driving mechanism is located between the injection molding machine and the conveying mechanism, the first lower conveying tube and the second lower conveying tube are located on both sides of the third lower conveying tube respectively, the first lower conveying tube, the second lower conveying tube and the third lower conveying tube are all hollow and open at both ends, the outlets of the first lower conveying tube, the second lower conveying tube and the third lower conveying tube face in different directions, the driving mechanism can drive the first lower conveying tube, the second lower conveying tube and the third lower conveying tube to move, and the driving mechanism can drive the storage box to move forward, so that each receiving box can be docked with one of the openings of the first lower conveying tube, the second lower conveying tube and the third lower conveying tube.

3. An injection mold according to claim 1, characterized in that: The plastic parts storage mechanism includes a storage box placed on a conveying mechanism, a plurality of receiving box groups are equidistantly distributed laterally inside the storage box, the receiving box group includes a plurality of receiving boxes equidistantly arranged longitudinally, two movable blocks are symmetrically and fixedly connected to the side of the receiving box, a plurality of threaded rods are rotatably connected inside the storage box, a plurality of guide rods are fixedly connected inside the storage box, one of the movable blocks of the receiving box is threadedly connected to the outside of the corresponding threaded rod, the other movable block of the receiving box slides through the corresponding guide rod, a notch is provided on the rear side of the storage box for the receiving box group and the movable block to pass through, and the end of the threaded rod close to the injection molding machine passes through the side wall of the storage box and is fixedly connected to the fixed gear.

4. The injection mold according to claim 1, characterized in that: The conveying mechanism includes two parallel baffles, the bottom end of the baffle is fixedly connected to a support block, the support block is fixedly arranged on the top of the bottom plate, a plurality of rotating rods are rotatably connected between the two baffles, a conveyor belt is arranged between the two baffles, the plurality of rotating rods are located inside the conveyor belt, and the plurality of rotating rods are cooperatively connected to the conveyor belt, and an extension rod is fixedly connected to the end of one of the rotating rods.

5. The injection mold according to claim 1, characterized in that: The first transmission mechanism includes a second fixed shaft, a first fixed shaft, and a third fixed shaft rotatably connected to the top of the base plate. The outer side of the second fixed shaft is fixedly sleeved with a reduction gear and an incomplete gear. The reduction gear is above the incomplete gear, and the reduction gear is meshed with the driving gear. The top of the first fixed shaft is fixedly connected with a synchronous gear, and the outer side of the third fixed shaft is fixedly sleeved with a speed-up gear and a first pulley in sequence from top to bottom. The speed-up gear is meshed with the synchronous gear, and the speed-up gear can drive the rotating rod to accelerate rotation through the second transmission mechanism.

6. An injection mold according to claim 5, characterized in that: The second transmission mechanism includes a fourth fixed shaft rotatably connected to the top of the base plate, and the outer side of the fourth fixed shaft is fixedly sleeved with a second pulley and a driving bevel gear in sequence from top to bottom, and a belt is transmission-connected between the second pulley and the first pulley, and the conveying mechanism includes an extension rod, and the end of the extension rod is fixedly connected to a driven bevel gear, and the driven bevel gear is meshingly connected to the driving bevel gear.

7. An injection mold according to any one of claims 1 to 6, characterized in that: The injection molding machine is provided with a male mold, a female mold, and a mold opening mechanism.

8. A packaging box molding method based on EPP material, using an injection mold as claimed in claim 7, characterized in that: The method comprises the following steps: filling EPP particles into a mold cavity through a feed port of the mold, sealing the mold, and heating the mold to soften and foam the EPP particles at high temperature; controlling the heating temperature and pressure to fully expand the EPP particles in the mold and fit the mold shape; after preliminary molding, cooling the mold to solidify and shape the EPP material; and after cooling and shaping, separating the movable mold from the fixed mold through the mold opening mechanism.

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