Injection molding equipment and injection molding method thereof

Abstract

The invention discloses injection molding equipment and an injection molding method thereof, and belongs to the technical field of injection molding. The injection molding equipment comprises a counter, an injection molding machine and a forming mold, one end of the counter is provided with the forming mold, the other end is provided with the injection molding machine, one end of the injection molding machine abuts against the forming mold, the other end is provided with a hopper, and a heating mechanism is arranged between the two ends; an injection molding machine comprises a first injection molding section, a driving section, a pushing section, a second injection molding section and a nozzle which are sequentially connected and communicated, the nozzle abuts against a forming mold, and a hopper is arranged on the first injection molding section; the injection molding equipment has a very good homogenizing effect on molten plastic, can remove insoluble impurities or incompletely molten raw materials contained in fluid, can play a very good filtering role, avoids blockage, prolongs the service life of the injection molding equipment, improves the production efficiency of the injection molding equipment, and protects the precision and stability of the injection molding equipment.

Description

Technical Field

[0001] The invention relates to an injection molding device and an injection molding method thereof, belonging to the technical field of injection molding. Background Art

[0002] Injection molding is a manufacturing process. The injection molding process refers to the process of making a product of a certain shape by pressurizing, injecting, cooling, and separating the heated molten raw materials. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melting and plasticization - pressure injection - mold filling and cooling - mold opening and taking out the parts. After taking out the plastic parts, the mold is closed again for the next cycle. Although this process can be used for one-time production, it is usually used for batch production of the same parts. The advantages of injection molding are fast production speed, high efficiency, and a wide variety of colors and patterns. It is suitable for mass production and molding processing fields such as complex-shaped products. Due to its high output rate and quality consistency, injection molding is widely used in different industries to manufacture electrical components, automotive components, basic consumer plastics, furniture components, etc.

[0003] The injection molding manufacturing process relies on injection molding equipment. Injection molding equipment generally includes an injection molding machine and a mold. Under the joint action of the injection molding machine and the mold, not only can the quality and stability of the product be improved, but also batch production can be achieved and production efficiency can be improved. When the existing injection molding equipment is in use, due to the following reasons: (1) the raw materials (especially when recycled plastics are used as raw materials) may contain some infusible impurities, particles or other contaminants; (2) the raw materials in the injection molding machine have not completely become molten; (3) the additives, color powder, masterbatch, etc. used in the raw materials form granular debris during the mixing process; (4) the melting points of the plastic raw materials and additives are different; etc., large particles of solid matter will enter the nozzle and the inside of the mold, affecting the molding quality of the product, easily resulting in unqualified injection molded products, and even causing nozzle blockage. Once the blockage occurs, the injection molding nozzle needs to be disassembled for cleaning. Not only is the cleaning efficiency low, but it also affects the production of the equipment, making the injection molding machine unable to continue the injection molding work, and thus affecting the entire processing. Not only does it reduce production efficiency, it can even easily cause damage to the nozzle. If it is allowed to be injected into the mold, it will affect the accuracy of the mold in the long run or even damage the mold.

[0004] Although some injection molding equipment will be equipped with a filtering device at the nozzle structure, it is affected by the size of the nozzle structure itself, the filtering area is limited, and the filtering effect is not ideal. If the raw material working condition is not good, a large amount of particulate matter will quickly accumulate at the nozzle filtering structure, requiring high-frequency cleaning, which will also affect production efficiency. In addition, setting a filtering structure at the nozzle structure makes the nozzle structure more complicated, and it is inconvenient to clean impurities after disassembly.

[0005] In addition, in the existing injection molding equipment, since it is necessary to drive the screw to rotate and push the screw to make the plunger reciprocating motion during the injection molding process, it is necessary to set up a motor and a hydraulic cylinder (or a linear module) and other structures at the opposite end of the injection molding end of the injection molding machine. Not only is the structural setting complicated, but the overall structure is long, and the installation space requirements are high. Summary of the invention

[0006] 1. Technical issues to be resolved The technical problem to be solved by the present invention is to solve the problem that the existing injection molding equipment has an unsatisfactory filtering effect on impurities, affects product quality and production efficiency, and has a large size.

[0007] (II) Technical solution In order to solve the above technical problems, the present invention provides an injection molding device, including a counter, an injection molding machine and a molding mold, wherein the molding mold is arranged at one end of the counter, and the injection molding machine is arranged at the other end, one end of the injection molding machine is against the molding mold, and the other end is provided with a hopper, and a heating mechanism is arranged between the two ends; the injection molding machine includes a first injection molding section, a driving section, a pushing section, a second injection molding section and a nozzle which are connected and communicated in sequence, the nozzle is against the molding mold, and the hopper is arranged on the first injection molding section.

[0008] The first injection molding section and the second injection molding section are respectively provided with conveying screws, and the conveying screws of the two extend into the driving section and are plugged therewith respectively. The driving section rotates to drive the conveying screws of the first injection molding section and the second injection molding section to work, so as to convey and melt the raw materials in the hopper along the first injection molding section, the driving section, the pushing section, the second injection molding section and the nozzle.

[0009] The pushing section includes a pushing sleeve and a pushing sleeve threadedly connected thereto. The conveying screw in the second injection molding section is connected to the pushing sleeve and can rotate along the connection. The rotation of the pushing sleeve drives the pushing sleeve to move. The movement of the pushing sleeve drives the conveying screw in the second injection molding section to move along its axial direction, so as to inject the molten material in the second injection molding section into the molding mold along the nozzle.

[0010] The driving section comprises a filter plate, on which dense filter holes are arranged, and the material flowing through the driving section is filtered by the filter plate.

[0011] Furthermore, the present design also includes a driving transmission mechanism, a driving motor, a pushing transmission mechanism and a pushing motor. The driving motor and the pushing motor are respectively arranged in the counter below the driving section and the pushing section. The driving motor and the pushing motor are respectively connected to the driving section and the pushing section through the driving transmission mechanism and the pushing transmission mechanism. The driving section and the pushing section rotate under the action of the driving motor and the pushing motor respectively, and the pushing motor is a forward and reverse motor. The pushing section can rotate forward or reverse under the action of the pushing motor.

[0012] Furthermore, the present design also includes a first bearing seat and a second bearing seat, wherein the second bearing seats are respectively arranged on the left and right sides of the first bearing seat, the driving section is rotatably arranged between the first bearing seat and the second bearing seat on the right side, and the pushing section is rotatably arranged between the first bearing seat and the second bearing seat on the left side; the first injection molding section and the driving section, and the pushing section and the second injection molding section are respectively connected through the second bearing seats, and the driving section and the pushing section are connected through the first bearing seat.

[0013] Furthermore, the driving section also includes a driving sleeve and a driving plate. The two ends of the driving sleeve are respectively rotatably connected to the first bearing seat and the second bearing seat. The driving plates are respectively arranged in the two ends of the driving sleeve. The conveying screws in the first injection molding section and the second injection molding section are respectively plugged into the driving plates. The filter plate is arranged in the middle of the driving sleeve.

[0014] Furthermore, the driving plate is a circular plate with a polygonal through hole in the middle, the end of the conveying screw connected to the driving plate is configured as a corresponding polygonal column structure, the conveying screw is inserted into the polygonal through hole, and a plurality of first circulation channels are arranged in a circumferential array on the driving plate.

[0015] Furthermore, an annular groove is arranged on the conveying screw in the second injection molding section, a connecting hole is arranged in the middle of the pushing sleeve, the pushing sleeve is clamped in the annular groove through the connecting hole, and a plurality of second circulation channels are arranged in a circumferential array on the pushing sleeve.

[0016] Furthermore, the present design also includes a guide ring, which is fixedly disposed in the first bearing seat, and a plurality of guide rods are disposed in a circumferential array on the push sleeve, and a plurality of guide holes for receiving the guide rods are disposed in a circumferential array on the guide ring. During the movement of the push sleeve, the guide rods always remain connected to the guide holes, and a plurality of third circulation channels are disposed in a circumferential array on the guide ring.

[0017] Furthermore, in the initial state of the present design, the connecting end of the conveying screw and the driving section in the second injection molding section extends beyond the driving plate connected thereto, and the distance beyond the driving plate is not less than the travel distance that the pushing sleeve can move linearly in the pushing sleeve.

[0018] Furthermore, a plunger head is provided at one end of the conveying screw in the second injection molding section close to the nozzle, and heating mechanisms are respectively provided on the first injection molding section, the first bearing seat, the second bearing seat, the second injection molding section and the nozzle.

[0019] The present invention also provides an injection molding method of an injection molding device, which comprises the following steps: S1. Adding materials: Put the raw materials for injection molding into the hopper and turn on the heating mechanism; S2, melting and plasticizing: the driving motor starts, drives the driving section to rotate, and the driving section rotates to drive the conveying screws of the first injection molding section and the second injection molding section to work, so as to convey and melt the raw materials in the hopper along the first injection molding section, the driving section, the pushing section, the second injection molding section and the nozzle; S3, pressure injection: the driving motor stops working and starts the pushing motor, the pushing motor drives the pushing section to rotate, the pushing sleeve rotates to drive the pushing sleeve to move, the pushing sleeve moves to drive the conveying screw in the second injection section to move along its axial direction, so as to inject the molten material in the second injection section into the molding mold along the nozzle; S4, mold filling and cooling: After the molten material fills the mold cavity, the injection is stopped, the motor is shut down, and the mold is cooled; S5, mold opening and product removal: Open the mold and take out the molded product, and at the same time control the motor to reverse and drive the conveying screw in the second injection molding section to reset; S6. Start the next production cycle.

[0020] (III) Beneficial effects The above technical solution of the present invention has the following advantages: The present invention arranges the injection molding machine into a structural form of a first injection molding section, a driving section, a pushing section, a second injection molding section and a nozzle, and arranges a filter plate in the driving section; on the one hand, during the injection molding process, the unmelted or unmelted particle impurities entrained by the flowing material in the injection molding machine can be effectively filtered and blocked to prevent the impurity particles from entering the nozzle and the inside of the mold, thereby ensuring that the plastic sprayed from the nozzle end has a high purity, thereby ensuring the quality and surface finish of the product, and reducing the risk of uneven flow and blockage during the injection molding process, improving the stability of the injection process, and helping to obtain a more consistent injection and filling effect, ensuring the size and appearance quality of the injection molded product. On the other hand, the volume of the injection molding equipment can be reduced, the equipment structure can be simplified, and the requirements and restrictions on the installation space of the injection molding equipment can be reduced. In addition, the materials can also be mixed and homogenized in the driving section and the pushing section (due to the rotation of the driving section and the pushing section, especially the rotation of the driving section, and the blocking and mixing of the functional plates inside the two, the original flow order of the materials is interrupted after passing into the two, thereby achieving the effect of stirring and mixing again), improving the mixing degree between the raw materials and various additives, and the coarse and fine raw materials, making the mixing more uniform, the melting more complete, the circulation smoother, and improving the quality of the molded products.

[0021] The filter structure of the present invention has a large filter area and is suitable for injection molding machines that use recycled materials containing more impurities; it has a large flow capacity and good anti-clogging performance and is suitable for injection molding machines with high-speed injection; it has a simple structure and is easy to process and install, which can improve production efficiency and is safe and reliable. When impurities in the raw materials clog the drive section and affect the flow of materials, the drive section only needs to be disassembled to quickly and conveniently clean out the debris in the drive section.

[0022] In addition to the technical problems solved by the present invention, the technical features of the technical solutions constituted by the present invention, and the advantages brought about by the technical features of these technical solutions described above, other technical features of the present invention and the advantages brought about by these technical features will be further explained in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the axonometric view of the present invention.

[0025] Figure 2 It is a schematic cross-sectional view of the present invention.

[0026] Figure 3 This is a schematic diagram of the present invention after the counter and the forming mold are hidden.

[0027] Figure 4 for Figure 3 Schematic diagram with the bearing housing hidden.

[0028] Figure 5 for Figure 4 Schematic cross-sectional view of .

[0029] Figure 6 for Figure 4 Schematic diagram of the explosion photo after further hiding the motor, etc.

[0030] In the figure: 1. counter; 2. injection molding machine; 3. molding mold; 4. hopper; 5. heating mechanism; 6. first injection molding section; 7. driving section; 8. pushing section; 9. second injection molding section; 10. nozzle; 11. conveying screw; 12. pushing sleeve; 13. pushing sleeve; 14. filter plate; 15. driving transmission mechanism; 16. driving motor; 17. pushing transmission mechanism; 18. pushing motor; 19. first bearing seat; 20. second bearing seat; 21. driving sleeve; 22. driving plate; 23. first circulation channel; 24. annular groove; 25. second circulation channel; 26. guide ring; 27. guide rod; 28. third circulation channel; 29. ​​plunger head. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Embodiment 1, as Figure 1-2 As shown, an injection molding device includes a counter 1, an injection molding machine 2 and a molding mold 3. The molding mold 3 is arranged at one end of the counter 1, and the injection molding machine 2 is arranged at the other end. One end of the injection molding machine 2 is against the molding mold 3, and the other end is provided with a hopper 4, and a heating mechanism 5 is arranged between the two ends; it can be understood that various electrical structures are also arranged in the counter 1 (not shown in the drawings), and a human-computer interaction console and a sliding cover of the molding mold 3 are also arranged on the counter 1. The above are all existing technologies, so they are not expanded here.

[0034] The injection molding machine 2 of this embodiment includes a first injection molding section 6, a driving section 7, a pushing section 8, a second injection molding section 9 and a nozzle 10 which are connected and connected in sequence. The nozzle 10 is against the molding die 3, specifically against the injection port of the molding die 3. The first injection molding section 6 is provided with a hopper 4, and the hopper 4 can be provided with a solenoid valve and a weighing mechanism for quantitative feeding. Figure 2-6As shown, the first injection molding section 6 and the second injection molding section 9 are respectively provided with a conveying screw 11 (the conveying screw 11 includes an intermediate shaft and a spiral blade arranged on the intermediate shaft), and the conveying screws 11 of the two extend into the driving section 7 and are plugged therewith (specifically, the intermediate shaft of the conveying screw 11 is plugged therewith, and the conveying screw 11 after plugging can slide axially along the driving section 7 but cannot rotate relative to the driving section 7). The rotation of the driving section 7 drives the conveying screws 11 of the first injection molding section 6 and the second injection molding section 9 to rotate, so as to convey and melt the raw materials in the hopper 4 along the first injection molding section 6, the driving section 7, the pushing section 8, the second injection molding section 9 and the nozzle 10. The pushing section 8 includes a pushing sleeve 12 and a pushing sleeve 13 threadedly connected thereto. The conveying screw 11 in the second injection section 9 is connected to the pushing sleeve 13 and can rotate along the connection (but cannot slide axially relative to the pushing sleeve 13). The rotation of the pushing sleeve 12 drives the pushing sleeve 13 to move axially. The axial movement of the pushing sleeve 13 drives the conveying screw 11 in the second injection section 9 to move axially, so as to inject the molten material in the second injection section 9 into the molding mold 3 along the nozzle 10. The injection molding machine 2 removes the driving mechanism such as the motor and hydraulic cylinder at one end of the hopper 4 and replaces it with a middle drive, which can shorten the length of the whole machine to a certain extent, reduce the restrictions and requirements on the installation space, and simplify the structure of the whole machine.

[0035] The driving section 7 includes a filter plate 14, on which dense filter holes are arranged, and the material flowing through the driving section 7 (which has been preliminarily melted in the first injection molding section 6 and the second bearing seat 20) is filtered by the filter plate 14. The improved injection molding machine 2 driven by the middle part combined with the filter plate 14 arranged in the driving section 7 can greatly improve the filtering effect, and its filtering area and impurity storage space are larger. It can be disassembled and cleaned after a relatively long period of use, which reduces the cleaning frequency, and the cleaning operation space is large and very convenient. In addition, the filter plate 14 is arranged in the driving section 7, and it rotates with the driving section 7, which plays a role in actively screening the material, further improving the filtering effect.

[0036] In addition, the materials can also be mixed and homogenized in the driving section 7 and the pushing section 8 (due to the rotation of the driving section 7 and the pushing section 8, especially the rotation of the driving section 7, and the blocking and mixing of the functional plates inside the two, the original flow order of the materials is interrupted after passing into the two, thereby achieving the effect of stirring and mixing again), improving the mixing degree between the raw materials and various additives, and the coarse and fine raw materials, making the mixing more uniform, the melting more complete, the circulation smoother, and improving the quality of the molded products.

[0037] Embodiment 2. This embodiment is a further optimization and refinement of the injection molding equipment based on Embodiment 1. Specifically, the injection molding equipment described in this embodiment also includes a driving transmission mechanism 15, a driving motor 16, a pushing transmission mechanism 17 and a pushing motor 18. The driving motor 16 and the pushing motor 18 are respectively arranged in the counter 1 below the driving section 7 and the pushing section 8. The driving motor 16 and the pushing motor 18 are respectively connected to the driving section 7 and the pushing section 8 through the driving transmission mechanism 15 and the pushing transmission mechanism 17. The driving section 7 and the pushing section 8 rotate under the action of the driving motor 16 and the pushing motor 18, respectively, and the pushing motor 18 is a forward and reverse motor. The pushing section 8 can rotate forward or reverse under the action of the pushing motor 18, so as to facilitate the conveying screw 11 in the second injection molding section 9 to compress the material and return to its original position. The driving transmission mechanism 15 and the pushing transmission mechanism 17 can be belt drive, chain drive or gear drive, etc. In this embodiment, belt drive is selected, specifically, large pulleys are respectively arranged on the driving section 7 and the pushing section 8, small pulleys are arranged at the output ends of the driving motor 16 and the pushing motor 18, and then the corresponding large pulleys and small pulleys are connected by a transmission belt. The large pulley, small pulley and transmission belt can be respectively provided with meshing teeth to improve the transmission effect.

[0038] Embodiment 3, this embodiment is based on embodiment 2, and further optimizes and refines the injection molding equipment, specifically: the injection molding equipment described in this embodiment also includes a first bearing seat 19 and a second bearing seat 20, the first bearing seat 19 and the second bearing seat 20 are respectively fixed on the counter 1, the second bearing seats 20 are respectively arranged on the left and right sides of the first bearing seat 19, the driving section 7 is rotatably arranged between the first bearing seat 19 and the second bearing seat 20 on the right side, and the pushing section 8 is rotatably arranged between the first bearing seat 19 and the second bearing seat 20 on the left side; the first injection molding section 6 and the driving section 7, the pushing section 8 and the second injection molding section 9 are respectively connected through the second bearing seat 20, and the driving section 7 and the pushing section 8 are connected through the first bearing seat 19. The bearing seat is used to connect the various functional sections of the injection molding machine 2, the connection is stable and reliable, and the circulation of materials can be ensured. It should be noted that a sealing structure such as a sealing ring needs to be set at the connection between the bearing seat and the various functional sections of the injection molding machine 2 to prevent material leakage, and the existing technical means can be used, which will not be expanded here.

[0039] Embodiment 4. This embodiment is based on Embodiment 3 and further optimizes and refines the structure of the driving section 7. Specifically, the driving section 7 also includes a driving sleeve 21 and a driving plate 22. The two ends of the driving sleeve 21 are respectively rotatably connected to the first bearing seat 19 and the second bearing seat 20. The driving plates 22 are respectively arranged in the two ends of the driving sleeve 21. The conveying screws 11 in the first injection molding section 6 and the second injection molding section 9 are respectively plugged into the driving plates 22. The filter plate 14 is arranged in the middle of the driving sleeve 21.

[0040] In this embodiment, the driving plate 22 is a circular plate with a hexagonal through hole in the middle. The end of the conveying screw 11 connected to the driving plate 22 is configured as a corresponding hexagonal column structure. The hexagonal column end of the conveying screw 11 is inserted into the hexagonal through hole to achieve a connection in which the conveying screw 11 can slide axially but not rotate circumferentially relative to the driving plate 22. A plurality of first circulation channels 23 are arranged in a circumferential array on the driving plate 22 to facilitate the circulation of materials.

[0041] Embodiment 5. This embodiment is based on Embodiment 4, and further optimizes and refines the structure of the second injection molding section 9 and the pushing sleeve 13. Specifically, an annular groove 24 is provided on the conveying screw 11 in the second injection molding section 9 (the middle shaft of the conveying screw 11 in the second injection molding section 9, whose end close to the pushing section 8 is not covered with spiral blades, and the annular groove 24 is provided on the middle shaft without spiral blades, specifically, two annular shoulders are provided on the middle shaft, and the annular groove 24 is formed between the two shoulders), and a connecting hole is provided in the middle part of the pushing sleeve 13 (a circular hole is used, and the hole diameter is slightly larger than the middle shaft of the conveying screw 11), and the pushing sleeve 13 is clamped in the annular groove 24 through the connecting hole, and a plurality of second circulation channels 25 are provided in a circumferential array on the pushing sleeve 13 to facilitate the circulation of materials.

[0042] Embodiment 6, this embodiment is based on embodiment 5, and further optimizes and refines the injection molding equipment, specifically: the injection molding equipment described in this embodiment also includes a guide ring 26, the guide ring 26 is fixedly arranged in the first bearing seat 19, and four guide rods 27 are arranged in a circumferential array on the push sleeve 13 (it can also be three or two, in order to ensure better structural strength, four are selected here), and four guide holes for receiving the guide rods 27 are arranged in a circumferential array on the guide ring 26. During the movement of the push sleeve 13, the guide rods 27 are always connected to the guide holes, so that when the push sleeve 12 rotates, the push sleeve 13 can only move axially, and will not rotate relative to the push sleeve 12, and accurately control the movement of the conveying screw 11 in the second injection molding section 9. A plurality of third circulation channels 28 are arranged in a circumferential array on the guide ring 26 to facilitate the circulation of materials.

[0043] Embodiment 7. This embodiment is based on Embodiment 6 and further optimizes and refines the injection molding equipment. Specifically, in the injection molding equipment described in this embodiment, in its initial state (that is, before the conveying screw 11 in the second injection molding section 9 starts to compress the material in the second injection molding section 9 to form the mold 3), the connecting end of the conveying screw 11 in the second injection molding section 9 and the driving section 7 extends beyond the driving plate 22 connected thereto (and the part extending beyond the driving plate 22 and the part connected to the driving plate 22 at this time are both hexagonal prism structures), and the distance beyond the driving plate 22 is not less than the travel distance that the pushing sleeve 13 can move linearly in the pushing sleeve 12, thereby preventing the conveying screw 11 in the second injection molding section 9 from detaching from the driving plate 22, and making the transmission smoother. Of course, if this is not the case, and the push sleeve 13 is used to drive the conveying screw 11 in the second injection molding section 9 to move, the connection between the conveying screw 11 and the drive plate 22 is disengaged (at this time, the hexagonal prism end of the conveying screw 11 in the second injection molding section 9 does not need to be lengthened). This method is also acceptable, but in this form, when the conveying screw 11 in the second injection molding section 9 is reset, it may not be easy to accurately insert the drive plate 22, and it is necessary to take measures such as appropriately enlarging the plug-in hole on the drive plate 22 to facilitate the insertion and reset of the conveying screw 11.

[0044] In this embodiment, a plunger head 29 is provided at one end of the conveying screw 11 in the second injection molding section 9 near the nozzle 10 to facilitate compression of the material (the injection molding machine 2 can heat the plastic and apply high pressure to the molten plastic to make it ejected and fill the mold cavity. The working principle of the plunger head 29 is similar to that of a syringe for injection. It uses the thrust of the screw to inject the plasticized molten state (i.e., viscous flow state) plastic into the mold cavity of the closed molding mold 3.), and a heating mechanism 5 is respectively provided on the first injection molding section 6, the first bearing seat 19, the second bearing seat 20, the second injection molding section 9 and the nozzle 10. The heating mechanism 5 adopts an electric heating wire. The specific setting can adopt existing technical means, which will not be described in detail here.

[0045] Embodiment 8, this embodiment provides an injection molding method of the injection molding device in the above embodiment, which comprises the following steps: S1, adding materials: loading the raw materials for injection molding, including various additives, etc., into the hopper 4, and turning on the heating mechanism 5 (it can also be preheated in advance); S2, melting and plasticizing: the driving motor 16 is started, driving the driving section 7 to rotate, and the driving section 7 rotates to drive the conveying screw 11 of the first injection molding section 6 and the second injection molding section 9 to work, so as to convey and melt the raw materials in the hopper 4 along the first injection molding section 6, the driving section 7, the pushing section 8, the second injection molding section 9 and the nozzle 10; S3, pressure injection: the driving motor 16 stops working (at this time, the conveying screws 11 of the first injection molding section 6 and the second injection molding section 9 stop rotating) and the pushing motor 18 is started, the pushing motor 18 drives the pushing sleeve 12 to rotate, the pushing sleeve 12 rotates and drives the pushing sleeve 13 to move, and the movement of the pushing sleeve 13 drives the conveying screw 11 in the second injection molding section 9 to move along its axial direction, so as to inject the molten material in the second injection molding section 9 into the molding mold 3 along the nozzle 10; S4, mold filling and cooling: After the molten material fills the cavity of the molding mold 3, the injection molding is stopped, the driving motor 18 is turned off, and the mold is cooled by the cooling system pipeline of the molding mold 3; S5, opening the mold and taking out the product: after the cooling is completed, the mold is opened and the molded product is taken out, and at the same time, the driving motor 18 is controlled to reverse and drive the conveying screw 11 in the second injection molding section 9 to reset; S6. Start the next production cycle.

[0046] It should be noted that the above is an automated production control process, and the specific control system can adopt existing technology.

[0047] In addition, in the description of the invention, unless otherwise specified, the terms "multiple", "multiple roots", "multiple groups" are used to mean two or more than two, and "several", "several roots", "several groups" are used to mean one or more than one. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] The specific implementation modes of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An injection molding device, comprising a counter (1), an injection molding machine (2) and a molding mold (3), wherein the molding mold (3) is arranged at one end of the counter (1) and the injection molding machine (2) is arranged at the other end, wherein one end of the injection molding machine (2) abuts against the molding mold (3) and the other end is provided with a hopper (4), and a heating mechanism (5) is arranged between the two ends; the device is characterized in that: The injection molding machine (2) comprises a first injection molding section (6), a driving section (7), a pushing section (8), a second injection molding section (9) and a nozzle (10) which are connected and communicated in sequence, the nozzle (10) being against the molding mold (3), and a hopper (4) being arranged on the first injection molding section (6); The first injection molding section (6) and the second injection molding section (9) are respectively provided with a conveying screw (11), and the conveying screws (11) of the two respectively extend into the driving section (7) and are plugged therewith, and the driving section (7) rotates to drive the conveying screws (11) of the first injection molding section (6) and the second injection molding section (9) to work, so as to convey and melt the raw materials in the hopper (4) along the first injection molding section (6), the driving section (7), the pushing section (8), the second injection molding section (9) and the nozzle (10); The pushing section (8) comprises a pushing sleeve (12) and a pushing sleeve (13) threadedly connected thereto; the conveying screw (11) in the second injection section (9) is connected to the pushing sleeve (13) and can rotate along the connection; the pushing sleeve (13) and the pushing sleeve (13) rotate to drive the pushing sleeve (13) to move; the movement of the pushing sleeve (13) drives the conveying screw (11) in the second injection section (9) to move along its axial direction, so as to inject the molten material in the second injection section (9) into the molding mold (3) along the nozzle (10); The driving section (7) comprises a filter plate (14), on which dense filter holes are arranged, and material flowing through the driving section (7) is filtered by the filter plate (14).

2. The injection molding device according to claim 1, characterized in that: The invention also comprises a driving transmission mechanism (15), a driving motor (16), a pushing transmission mechanism (17) and a pushing motor (18). The driving motor (16) and the pushing motor (18) are respectively arranged in the counter (1) below the driving section (7) and the pushing section (8). The driving motor (16) and the pushing motor (18) are respectively connected to the driving section (7) and the pushing section (8) through the driving transmission mechanism (15) and the pushing transmission mechanism (17). The driving section (7) and the pushing section (8) rotate under the action of the driving motor (16) and the pushing motor (18), respectively. The pushing motor (18) is a forward and reverse motor. The pushing section (8) can rotate forward or reverse under the action of the pushing motor (18).

3. The injection molding device according to claim 2, characterized in that: The invention also comprises a first bearing seat (19) and a second bearing seat (20), wherein the second bearing seats (20) are respectively arranged on the left and right sides of the first bearing seat (19), the driving section (7) is rotatably arranged between the first bearing seat (19) and the second bearing seat (20) on the right side thereof, and the pushing section (8) is rotatably arranged between the first bearing seat (19) and the second bearing seat (20) on the left side thereof; the first injection molding section (6) and the driving section (7), and the pushing section (8) and the second injection molding section (9) are respectively connected via the second bearing seats (20), and the driving section (7) and the pushing section (8) are connected via the first bearing seat (19).

4. The injection molding device according to claim 3, characterized in that: The driving section (7) further comprises a driving sleeve (21) and a driving plate (22); two ends of the driving sleeve (21) are rotatably connected to the first bearing seat (19) and the second bearing seat (20), respectively; the driving plates (22) are respectively arranged in the two ends of the driving sleeve (21); the conveying screws (11) in the first injection molding section (6) and the second injection molding section (9) are respectively plugged into the driving plates (22); and the filter plate (14) is arranged in the middle of the driving sleeve (21).

5. The injection molding device according to claim 4, characterized in that: The driving plate (22) is a circular plate with a polygonal through hole in the middle thereof; one end of the conveying screw (11) connected to the driving plate (22) is configured to form a corresponding polygonal column structure; the conveying screw (11) is inserted into the polygonal through hole; and a plurality of first circulation channels (23) are arranged in a circumferential array on the driving plate (22).

6. The injection molding device according to claim 5, characterized in that: An annular groove (24) is provided on the conveying screw (11) in the second injection molding section (9), a connecting hole is provided in the middle of the push sleeve (13), the push sleeve (13) is clamped in the annular groove (24) through the connecting hole, and a plurality of second circulation channels (25) are provided in a circumferential array on the push sleeve (13).

7. The injection molding device according to claim 6, characterized in that: It also includes a guide ring (26), which is fixedly arranged in the first bearing seat (19), and a plurality of guide rods (27) are arranged in a circumferential array on the push sleeve (13), and a plurality of guide holes for receiving the guide rods (27) are arranged in a circumferential array on the guide ring (26). During the movement of the push sleeve (13), the guide rods (27) always remain connected to the guide holes, and a plurality of third circulation channels (28) are arranged in a circumferential array on the guide ring (26).

8. The injection molding device according to claim 7, characterized in that: In the initial state, the connecting end of the conveying screw (11) in the second injection molding section (9) and the driving section (7) protrudes beyond the driving plate (22) connected thereto, and the distance by which it protrudes beyond the driving plate (22) is not less than the travel distance that the pushing sleeve (13) can move linearly within the pushing sleeve (12).

9. The injection molding device according to claim 8, characterized in that: A plunger head (29) is provided at one end of the conveying screw (11) in the second injection molding section (9) close to the nozzle (10), and a heating mechanism (5) is provided on the first injection molding section (6), the first bearing seat (19), the second bearing seat (20), the second injection molding section (9) and the nozzle (10), respectively.

10. The injection molding method of the injection molding equipment according to claim 9, characterized in that: The following steps are involved: S1, adding materials: loading the raw materials for injection molding into the hopper (4) and turning on the heating mechanism (5); S2, melting and plasticizing: the driving motor (16) is started, driving the driving section (7) to rotate, and the driving section (7) drives the conveying screws (11) of the first injection molding section (6) and the second injection molding section (9) to work, so as to convey and melt the raw materials in the hopper (4) along the first injection molding section (6), the driving section (7), the pushing section (8), the second injection molding section (9) and the nozzle (10); S3, pressure injection: the driving motor (16) stops working and starts the pushing motor (18), the pushing motor (18) drives the pushing sleeve (12) to rotate, the pushing sleeve (12) rotates to drive the pushing sleeve (13) to move, the movement of the pushing sleeve (13) drives the conveying screw (11) in the second injection molding section (9) to move along its axial direction, so as to inject the molten material in the second injection molding section (9) into the molding mold (3) along the nozzle (10); S4, mold filling and cooling: after the molten material fills the cavity of the molding mold (3), the injection molding is stopped, the driving motor (18) is turned off, and the mold is cooled; S5, opening the mold and taking out the product: opening the mold and taking out the molded product, and at the same time controlling the driving motor (18) to reverse and drive the conveying screw (11) in the second injection molding section (9) to reset; S6. Start the next production cycle.

Images