Injection-molding apparatus for plastic injection molding

Abstract

The application relates to the technical field of injection molding equipment, and particularly discloses injection molding equipment for plastic injection molding, which comprises a fixed base, an injection molding operation box, a raw material conveying box, a discharging pipe, a feeding hopper, a preheating mechanism, an injection molding mechanism arranged in the injection molding operation box and used for injection molding, and a conveying mechanism arranged in the raw material conveying box and used for conveying raw materials; the injection molding operation box and the raw material conveying box are fixedly connected with the fixed base; the two ends of the discharging pipe are respectively communicated with the raw material conveying box and the feeding hopper; the preheating mechanism comprises a boosting block, a propelling block, an air heat conduction assembly, a plurality of turnover assemblies equidistantly arranged along the width direction of the discharging pipe, a plurality of gas flow guide assemblies equidistantly arranged along the width direction of the discharging pipe, a slip assisting hole opened on the discharging pipe, and a driving assembly used for driving the boosting block to reciprocate along the length direction of the raw material conveying box; and the problem that the preheating temperature is uneven when the existing injection molding equipment preheats plastic particle raw materials is solved.

Description

Technical Field

[0001] This invention relates to the field of injection molding equipment technology, and more specifically to an injection molding equipment for plastic injection molding. Background Technology

[0002] Plastic injection molding equipment is a major molding device that uses plastic molds to form various shapes of plastic products from thermoplastic or thermosetting materials. However, in existing injection molding equipment, during the feeding process of plastic granules into the injection molding machine body, the bottom diameter of the feed hopper is relatively small, which easily causes the plastic granules to become clogged at the bottom of the feed hopper. This results in uneven feeding, which is detrimental to the material feeding operation and affects subsequent injection molding production.

[0003] To address the aforementioned issues, Chinese Patent Publication No. CN220593862U discloses a plastic injection molding machine, comprising a base, a machine body, a feed pipe, a hopper, a jet pipe, an injection molding mechanism, an anti-blocking feeding mechanism, and a plastic granule raw material preheating mechanism. The machine body is fixedly mounted on the top of the base, the feed pipe is fixedly mounted at the feed inlet end of the machine body, and the hopper is fixedly mounted at the top of the feed pipe. A feeding port is located on the right side of the top of the hopper. This device, through the anti-blocking feeding mechanism, ensures that the plastic granules in the hopper smoothly pass through the feed pipe into the machine body without clogging, achieving smooth feeding and ensuring the smooth operation of injection molding production.

[0004] The above-mentioned device has the following problems in actual use: When the device is in use, the heat absorbed by the cooling water from the spray pipe is the "waste heat" of the injection molding melting process. Its temperature is unstable and difficult to control precisely. When this heat is transferred to the plastic particles through the spiral water cavity, the raw material near the pipe wall may be overheated, while the raw material in the center may be underheated, resulting in uneven preheating temperature, which causes damage to the performance of the raw material. Summary of the Invention

[0005] This invention provides an injection molding equipment for plastic injection molding, which solves the problem of uneven preheating temperature in existing injection molding equipment when preheating plastic granule raw materials.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection molding equipment for plastic injection molding, comprising a fixed base; further comprising an injection operation box, a raw material conveying box, a discharge pipe, a feeding hopper, a preheating mechanism, an injection mechanism disposed within the injection operation box for injection molding, and a conveying mechanism disposed within the raw material conveying box for conveying raw materials; the injection operation box and the raw material conveying box are both fixedly connected to the fixed base; both ends of the discharge pipe are respectively connected to the raw material conveying box and the feeding hopper; the preheating mechanism includes a booster block, a propulsion block, an air heat conduction component, a plurality of tilting components equidistantly arranged along the width direction of the discharge pipe, and a plurality of other components equidistantly arranged along the width direction of the discharge pipe. The system includes several gas guiding components, a sliding hole on the feed pipe, and a drive component for driving the pusher block to reciprocate along the length of the raw material conveying box; the pusher block is slidably connected to the sliding hole; the pusher block is located inside the feed pipe and is fixedly connected to the pusher block; the turning component includes several turning blocks equidistantly arranged along the length of the pusher block; the turning blocks are connected to the pusher block; the air heat conduction component is fixedly connected to the outer wall of the feed pipe; the gas guiding component includes a guide pipe, a guide hole on the feed pipe, and a group of preheating holes equidistantly opened on the guide pipe along the length of the guide pipe; the guide pipe is connected to the guide hole; the guide hole is connected to the exhaust port of the air heat conduction component.

[0007] The principle and advantages of this scheme are: 1. During the process of feeding plastic raw materials into the raw material conveying box, the feeding pipe allows hot air to be sprayed evenly from different positions through several preheating holes on the guide pipe. This ensures that plastic raw materials at different heights and positions in the feeding pipe can come into contact with the hot air, avoiding problems such as insufficient preheating or overheating of local raw materials. This ensures that the overall raw material temperature is consistent, providing a stable foundation for subsequent melting and processing.

[0008] When the hot airflow is blown out from the preheating hole, it loosens and disturbs the raw material falling in the feed pipe, which can prevent the raw material from accumulating and clumping, and keep the raw material in a loose falling state. This not only further improves the heat penetration effect, but also makes the feeding smoother, avoids clogging the feed pipe, and ensures that the raw material enters the raw material conveying box at a uniform speed.

[0009] 2. During the process of plastic raw materials falling through the feeding pipe, they can easily accumulate and stick together near the pipe wall or below the guide pipe, forming a "bridge" that blocks the feeding channel. The pusher block, which moves back and forth along the length of the raw material conveying box, can continuously stir and push the accumulated raw materials, break the bridge structure, and always ensure smooth feeding, avoiding production continuity caused by material blockage.

[0010] 3. During the reciprocating motion of the push block, the turning block can continuously turn the raw material in the feed pipe, allowing the raw material that has been heated on the outside and the raw material that has not been fully heated inside to be constantly exchanged and mixed, making the temperature of the whole batch of raw materials more uniform, solving the problem of internal and external temperature difference that occurs when the fixed guide hole is preheated, and improving the overall preheating consistency.

[0011] Furthermore, the equidistantly distributed tumbling blocks buffer and divert the falling raw materials, preventing them from falling rapidly in a concentrated manner. This allows the raw materials to be evenly distributed vertically along the feed pipe, ensuring that each batch of raw materials receives sufficient preheating time and making the discharge speed more stable, without fluctuations between fast and slow, thus helping to stabilize production in subsequent injection molding processes.

[0012] 4. By completing preheating and other pretreatments in the plastic raw material transportation process, the temperature of the raw material is more stable when it enters the injection molding operation box, the melting and plasticizing effect is more uniform, and the problems of internal stress and warping in the finished product are reduced, thereby promoting the efficient injection molding of plastic raw materials.

[0013] Furthermore, the flipping assembly also includes wall vibration blocks symmetrically arranged on both sides of the propulsion block along the length direction of the propulsion block; the wall vibration blocks are fixedly connected to the propulsion block.

[0014] As the wall vibrating block moves with the pusher block, it vibrates and strikes the pipe wall, causing the adhered material to fall off and keeping the pipe wall clean. This prevents the material from accumulating and blocking the feeding channel, and also ensures that the hot airflow can be smoothly transferred to the falling raw material, maintaining a stable preheating efficiency.

[0015] At the same time, the vibration of the tube wall will cause the entire layer of raw material inside the feeding tube to loosen slightly, increasing the gap between the raw material particles. This makes it easier for hot air to penetrate into the interior of the raw material, improving heat transfer efficiency and allowing the raw material to be preheated to the target temperature more quickly. This further shortens the preheating and subsequent injection molding cycle and improves overall production efficiency.

[0016] Furthermore, the propulsion block has a cavity, and the wall vibrating block has an inner sliding hole that communicates with the cavity; the flipping assembly also includes several connecting flipping parts equidistantly arranged along the length of the propulsion block; the connecting flipping part includes a connecting flipping block, a side hole on the feed pipe, several connecting flipping arc grooves equidistantly opened on the connecting flipping block along the length of the connecting flipping block, and a power unit for driving the connecting flipping block to reciprocate relative to the propulsion block; the connecting flipping block passes through the cavity, the side hole, and the inner sliding hole respectively, and the connecting flipping block is slidably connected to the cavity.

[0017] The connecting block can reciprocate relative to the push block. In conjunction with the overall movement of the push block, it can perform layered knocking and disturbance of agglomerates and bridging at different locations: when the push block reciprocates as a whole, it drives the connecting block to move as a whole. The independent movement of the connecting block itself can also loosen stubborn accumulated materials in a targeted manner, which is more thorough than the breaking effect of a single push block and completely avoids the blockage of high-viscosity raw materials.

[0018] The arc-shaped structure of the connecting flipping arc groove can guide the hot airflow to flow and diffuse between the raw material particles when flipping the raw material, increasing the penetration range of the hot airflow. At the same time, the reciprocating motion of the connecting flipping block will continuously change the gap between the raw materials, allowing the hot airflow to be exchanged more fully, further accelerating the preheating speed and shortening the overall processing cycle.

[0019] Furthermore, the flipping assembly also includes several auxiliary parts equidistantly arranged along the length of the propulsion block; the auxiliary parts include an auxiliary shaft, a first torsion spring, an arc-shaped block, and a top hole opened on the chamber; the auxiliary shaft is rotatably connected to the chamber; the two ends of the first torsion spring are respectively connected to the auxiliary shaft and the chamber; the flipping block passes through the top hole and extends into the chamber, and the flipping block is fixedly connected to the auxiliary shaft; the arc-shaped block is fixedly connected to the flipping block, and the arc-shaped block abuts against the connecting flipping arc groove.

[0020] When the raw material density is high, the turning block will automatically swing as it moves forward due to the resistance of the raw material, allowing it to cut into a deeper layer of raw material instead of staying on the surface and pushing the raw material. This can effectively break up the deep compacted clumps and allow the entire layer of raw material to be fully turned over.

[0021] During the oscillation of the turning block, additional irregular small-amplitude turbulence is generated, which promotes more thorough diffusion and mixing of hot air between raw material particles, allowing the hot air to penetrate deep into the gaps of the raw material accumulation, reducing the temperature difference between the inner and outer layers of raw materials, and improving the preheating uniformity more significantly than with a fixed turning block.

[0022] Furthermore, it also includes a plurality of linkage guide components equidistantly arranged along the width direction of the feed pipe; the linkage guide components include a plurality of linkage guide parts equidistantly arranged along the length direction of the guide pipe; the linkage guide parts include a linkage shaft, a second torsion spring, a linkage pipe, a hose, and a plurality of side flow holes symmetrically opened on the linkage pipe along the length direction of the linkage pipe; the linkage shaft is rotatably connected to the guide pipe; the two ends of the second torsion spring are respectively connected to the linkage shaft and the guide pipe; the linkage pipe is fixedly connected to the linkage shaft and is located on the movement trajectory of the push block; the two ends of the hose are respectively connected to the guide pipe and the linkage pipe.

[0023] During the swinging process of the linkage tube, it actively stirs the loose raw materials and opens up the gaps between the raw material particles. The airflow channels that were originally compacted and blocked are opened, and the hot airflow can more easily penetrate into the interior of the raw material pile, instead of just flowing on the surface. This greatly improves the penetration efficiency of the hot airflow, and the deep raw materials can also be sufficiently heated.

[0024] The side flow holes are symmetrically arranged on both sides of the linkage pipe. Together with the original two end face air outlets, the hot air can be discharged from multiple directions at the same time, forming a three-dimensional air outlet effect, covering the raw materials in all areas around the linkage pipe, completely eliminating dead air outlets, and allowing raw materials in any position to come into contact with the hot air.

[0025] Furthermore, during the swing of the linkage tube, the side flow holes on both sides will always sweep across the raw materials at different positions: when swinging to the left, the left side flow hole fully contacts the raw materials, and when swinging to the right, the right side flow hole releases air for heating. Throughout the process, the hot airflow can be directly applied to the raw materials, and the airflow efficiency will not decrease due to the swing. On the contrary, the swing expands the effective range of the side flow holes and enhances the penetration effect of the hot airflow into the raw materials.

[0026] Furthermore, the linkage guide section also includes an adjustment auxiliary unit disposed inside the linkage pipe; the adjustment auxiliary unit includes an inner shaft, an adjustment auxiliary plate, and a power component for driving the adjustment auxiliary plate to swing; the inner shaft is rotatably connected to the linkage pipe; the adjustment auxiliary plate is fixedly connected to the inner shaft.

[0027] When the linkage pipe swings, the air outlet direction will shift with the swing of the pipe. The adjustment auxiliary plate can swing in the opposite direction to counteract the shift, so that the hot airflow is always sprayed towards the raw material accumulation area. This will prevent some areas from not receiving hot air due to the swing of the pipe and will always maintain uniform directional coverage.

[0028] When the auxiliary plate swings, it disperses the concentrated mainstream airflow in the pipe and distributes it to each side flow hole, so that each side flow hole can obtain a stable airflow direction. This avoids a large flow rate concentrated from a few holes, ensuring that the direction of all air outlets is stable and controllable, further eliminating preheating blind spots and improving the overall preheating uniformity.

[0029] Furthermore, the adjustment auxiliary unit also includes several perforated brushes symmetrically arranged on both sides of the adjustment auxiliary plate; the perforated brushes are fixedly connected to the adjustment auxiliary plate, and the side flow holes are located on the movement trajectory of the perforated brushes.

[0030] Fine particles and molten debris from plastic raw materials can easily get stuck in the side flow holes, causing poor airflow. The side flow holes are located on the movement trajectory of the orifice brush. With each swing of the adjustment auxiliary plate, the orifice brush will clean the corresponding side flow hole, which can promptly remove the raw material debris stuck in the hole, thus preventing the side flow holes from becoming clogged and ensuring that all side flow holes can ventilate normally in the long term.

[0031] Furthermore, the drive assembly includes a drive shaft, a gear, a rack, a bottom groove on the booster block, and a drive component for rotating the drive shaft; the drive shaft is rotatably connected to the outer wall of the feed tube; the gear is fixedly connected to the drive shaft; the rack is fixedly connected to the bottom groove, and the rack meshes with the gear.

[0032] The drive shaft drives the gear to rotate, and during the rotation of the gear, the rack meshes with the gear, which in turn drives the pusher block to reciprocate along the length of the feed tube.

[0033] Furthermore, it also includes auxiliary components; the auxiliary components include a fixed block, a fixed rod, a side slider, and a fixed groove on the fixed block; the fixed block is fixedly connected to the outer wall of the feed pipe; the fixed rod is fixedly connected to the fixed groove, and the fixed rod is located on the movement trajectory of the side slider; the side slider is slidably connected to the fixed groove; the power unit is a power block; the two ends of the power block are fixedly connected to the connecting block and the side slider, respectively.

[0034] During the synchronous movement of the connecting block with the push block, the connecting block can perform lateral reciprocating motion relative to the push block through the abutment between the side slider and the fixed rod, as well as the abutment between the connecting block and the inner wall of the feed tube.

[0035] Furthermore, it also includes a linkage unit; the linkage unit includes several linkage components equidistantly arranged along the width direction of the feed tube; the linkage components include a linkage rod and several linkage block groups equidistantly arranged along the length direction of the linkage rod; the linkage rod is fixedly connected to the inner wall of the feed tube; the linkage block group includes linkage blocks symmetrically arranged on both sides of the linkage tube; the linkage blocks are fixedly connected to the linkage rod; the power component includes a third torsion spring and a power rod; the two ends of the third torsion spring are respectively connected to the inner shaft and the linkage tube; the power rod is fixedly connected to the adjustment auxiliary plate, and the linkage block is located on the movement trajectory of the power rod.

[0036] During the swing of the power rod with the linkage tube, the power rod, through the combined action of the linkage block and the third torsion spring, enables the adjustment auxiliary plate to swing relative to the linkage tube within the linkage tube. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an embodiment of an injection molding equipment for plastic injection molding according to the present invention.

[0038] Figure 2 for Figure 1 A schematic diagram of the internal structure of the feed pipe and the second protective plate.

[0039] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0040] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0041] Figure 5 for Figure 2 A schematic diagram of the internal structure of the first protective plate in the rear view.

[0042] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0043] Figure 7 for Figure 5 Enlarged view of point D in the middle. Detailed Implementation

[0044] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: fixed base 1, injection molding operation box 2, raw material conveying box 3, discharge pipe 4, feed hopper 5, booster block 6, propulsion block 7, first protective plate 8, flipping block 9, air heater 10, guide pipe 11, preheating hole 12, power box 13, wall vibration block 14, connecting flipping block 15, linkage shaft 16, linkage pipe 17, side flow hole 18, adjustment auxiliary plate 19, orifice brush 20, slider 21, connecting rod 22, side auxiliary pipe 23, gear 24, fixed block 25, side slider 26, power block 27, linkage rod 28, linkage block 29, power rod 30, drive box 31, and second protective plate 32.

[0045] The basic implementation examples are as follows: Figure 1 , 2 As shown in points 3, 4, 5, 6, and 7: This invention provides an injection molding machine for plastic injection molding, comprising a fixed base 1; and further comprising an injection operation box 2, a raw material conveying box 3, a discharge pipe 4, a feed hopper 5, a preheating mechanism, an injection mechanism disposed in the injection operation box 2 for injection molding, and a conveying mechanism disposed in the raw material conveying box 3 for conveying raw materials; the injection operation box 2 and the raw material conveying box 3 are both fixedly connected to the fixed base 1; both ends of the discharge pipe 4 are respectively connected to the raw material conveying box 3 and the feed hopper 5; the preheating mechanism includes a booster block 6, a propulsion block 7, an air heat conduction component, a plurality of equidistant turning components arranged along the width direction of the discharge pipe 4, a plurality of equidistant gas guiding components arranged along the width direction of the discharge pipe 4, a sliding hole opened on the discharge pipe 4, and a mechanism for driving the booster block 6 along the raw material conveying box 3. A drive assembly that reciprocates along the length direction; a first protective plate 8 is fixedly connected to the outer wall of the feed pipe 4; a booster block 6 is located inside the first protective plate 8; the booster block 6 is slidably connected to the sliding hole; a propulsion block 7 is located inside the feed pipe 4 and below the guide pipe 11, and the propulsion block 7 is fixedly connected to the booster block 6; a flipping assembly includes several flipping blocks 9 equidistantly arranged along the length direction of the propulsion block 7; the flipping blocks 9 are connected to the propulsion block 7; an air heat conduction assembly is fixedly connected to the outer wall of the feed pipe 4; the air heat conduction assembly is an air heater 10; a gas flow guide assembly includes a guide pipe 11, a flow guide hole opened on the feed pipe 4, and a group of preheating holes equidistantly opened on the guide pipe 11 along the length direction of the guide pipe 11; the guide pipe 11 is connected to the flow guide hole; the flow guide hole is connected to the exhaust port of the air heat conduction assembly.

[0046] The injection molding mechanism includes an injection molding module, an injection molding block, a power cylinder, a first through hole on the injection molding module, and a second through hole on the raw material conveying box 3. The injection molding module is fixedly connected to the inner wall of the injection molding operation box 2, and the first through hole communicates with the second through hole. The injection molding block is slidably connected to the inner wall of the injection molding operation box 2, and the injection molding module is located on the movement trajectory of the injection molding block. The power cylinder is fixedly connected to the inner wall of the injection molding operation box 2, and the output shaft of the power cylinder is fixedly connected to the injection molding block.

[0047] The raw material conveying box 3 includes a power box 13, a power motor, a rotating shaft, a spiral conveying blade, and an electromagnetic heating block assembly fixed to the inner wall of the raw material conveying box 3; the power box 13 is fixed to the outer wall of the raw material conveying box 3; the power motor is fixed to the inner wall of the power box 13; the rotating shaft is rotatably connected to the power box 13 and the raw material conveying box 3 respectively; the spiral conveying blade is located inside the raw material conveying box 3 and is fixed to the rotating shaft.

[0048] During the process of feeding plastic raw materials into the injection molding module via spiral blades, the electromagnetic heating block assembly heats and melts the plastic raw materials. Then, through the cooperation of the injection molding block and the injection molding module, the molten plastic is injection molded.

[0049] The flipping assembly also includes wall vibration blocks 14 symmetrically arranged on the left and right sides of the propulsion block 7 along the length direction of the propulsion block 7; the wall vibration blocks 14 are fixedly connected to the propulsion block 7.

[0050] The push block 7 has a cavity, and the wall vibrating block 14 has an inner sliding hole that communicates with the cavity. The flipping assembly also includes several flipping parts that are equidistantly arranged along the length of the push block 7. The flipping part includes a flipping block 15, a side hole on the feed pipe 4, several flipping arc grooves that are equidistantly arranged along the length of the flipping block 15, and a power unit for driving the flipping block 15 to reciprocate relative to the push block 7. The flipping block 15 passes through the cavity, the side hole, and the inner sliding hole, and the flipping block 15 is slidably connected to the cavity.

[0051] The flipping assembly also includes several auxiliary parts equidistantly arranged along the length of the push block 7; the auxiliary parts include an auxiliary shaft, a first torsion spring, an arc-shaped block, and a top hole opened on the chamber; the auxiliary shaft is rotatably connected to the chamber; the two ends of the first torsion spring are respectively connected to the auxiliary shaft and the chamber; the flipping block 9 passes through the top hole and extends into the chamber, and the flipping block 9 is fixedly connected to the auxiliary shaft; the arc-shaped block is fixedly connected to the flipping block 9, and the end of the arc-shaped block away from the flipping block 9 is located at the trough of the connecting flipping arc groove, and the arc-shaped block abuts against the connecting flipping arc groove.

[0052] It also includes a plurality of linkage guide components equidistantly arranged along the width direction of the feed pipe 4; the linkage guide components include a plurality of linkage guide parts equidistantly arranged along the length direction of the guide pipe 11; the linkage guide parts include a linkage shaft 16, a second torsion spring, a linkage pipe 17, a hose, and a plurality of side flow holes 18 symmetrically opened on the left and right sides of the linkage pipe 17 along the length direction of the linkage pipe 17; the linkage shaft 16 is rotatably connected to the guide pipe 11; the second torsion spring is located inside the guide pipe 11, and the two ends of the second torsion spring are respectively connected to the linkage shaft 16 and the guide pipe 11; the linkage pipe 17 is fixedly connected to the linkage shaft 16, and the linkage pipe 17 is located on the movement trajectory of the push block 7; the two ends of the hose are respectively connected to the guide pipe 11 and the linkage pipe 17; the plurality of side flow holes 18 are equidistantly arranged along the length direction of the linkage pipe 17.

[0053] The linkage guide section also includes an adjustment auxiliary unit disposed in the linkage pipe 17; the adjustment auxiliary unit includes an inner shaft, an adjustment auxiliary plate 19, and a power component for driving the adjustment auxiliary plate 19 to swing; the inner shaft is rotatably connected to the linkage pipe 17; the adjustment auxiliary plate 19 is fixedly connected to the inner shaft.

[0054] The adjustment auxiliary unit also includes a number of perforated brushes 20 symmetrically arranged on the left and right sides of the adjustment auxiliary plate 19; the number of perforated brushes 20 are equidistantly arranged along the length direction of the adjustment auxiliary plate 19; the perforated brushes 20 are fixedly connected to the adjustment auxiliary plate 19, and the side flow holes 18 are located on the movement trajectory of the perforated brushes 20.

[0055] The gas guiding assembly also includes several guiding auxiliary parts equidistantly arranged along the length of the guiding pipe 11; the guiding auxiliary parts include a slider 21, a connecting rod 22, and guiding auxiliary units symmetrically arranged on both sides of the slider 21; the slider 21 is slidably connected to the outer wall of the top of the guiding pipe 11; the two ends of the connecting rod 22 are respectively hinged to the slider 21 and the linkage pipe 17; the guiding auxiliary unit includes a side auxiliary shaft, a fourth torsion spring, and a side auxiliary pipe 23; the side auxiliary shaft is rotatably connected to the inner wall of the guiding pipe 11; the two ends of the fourth torsion spring are respectively connected to the side auxiliary shaft and the guiding pipe 11; one end of the side auxiliary pipe 23 passes through the preheating hole 12 and extends into the guiding pipe 11, and the side auxiliary pipe 23 is fixedly connected to the side auxiliary shaft; the slider 21 is located between the two side auxiliary pipes 23, and the side auxiliary pipes 23 are located on the movement trajectory of the slider 21.

[0056] The drive assembly includes a drive shaft, a gear 24, a rack, a bottom groove on the pusher block 6, and a drive component for rotating the drive shaft; the drive shaft is rotatably connected to the outer wall of the feed tube 4; the gear 24 is fixedly connected to the drive shaft; the rack is fixedly connected to the bottom groove, and the rack meshes with the gear 24.

[0057] It also includes auxiliary components; the auxiliary components include a fixed block 25, a fixed rod, a side slider 26, and a fixed groove on the fixed block 25; the fixed block 25 is fixedly connected to the outer wall of the feed pipe 4; the fixed rod is fixedly connected to the fixed groove, and the fixed rod is located on the movement trajectory of the side slider 26; the side slider 26 is slidably connected to the fixed groove; the power unit is a power block 27; the two ends of the power block 27 are fixedly connected to the connecting block 15 and the side slider 26 respectively; a second protective plate 32 is fixedly connected to the outer wall of the feed pipe 4; the second protective plate 32 is used to protect the fixed block 25, the side slider 26 and other components.

[0058] It also includes a linkage unit; the linkage unit includes several linkage components equidistantly arranged along the width direction of the feed tube 4; the linkage components include a linkage rod 28 and several linkage block groups equidistantly arranged along the length direction of the linkage rod 28; the linkage rod 28 is fixedly connected to the inner wall of the feed tube 4; the linkage block group 29 includes linkage blocks 29 symmetrically arranged on the left and right sides of the linkage tube 17; the linkage block 29 is vertically fixedly connected to the linkage rod 28; the power component includes a third torsion spring and a power rod 30; the two ends of the third torsion spring are respectively connected to the inner shaft and the linkage tube 17; the power rod 30 is fixedly connected to the adjustment auxiliary plate 19, and the linkage block 29 is located on the movement trajectory of the power rod 30.

[0059] The driving components include a drive housing 31 and a drive servo motor; the drive housing 31 is fixedly connected to the outer wall of the feeding tube 4; the drive servo motor is fixedly connected to the inner wall of the drive housing 31; the drive shaft is rotatably connected to the drive housing 31, and the drive shaft is fixedly connected to the output shaft of the drive servo motor.

[0060] Specific implementation process: During the process of feeding plastic raw materials into the raw material conveying box 3, the air is heated by the air heating period, and then the hot airflow is introduced into the guide pipe 11. Then, through a number of preheating holes 12 on the guide pipe 11, the hot airflow can be sprayed out evenly from different positions, so that the plastic raw materials at different heights and positions in the feeding pipe 4 can all come into contact with the hot airflow. This avoids the problem of insufficient preheating or overheating of local raw materials, and ensures that the overall raw material temperature is consistent, providing a stable foundation for subsequent melting and processing.

[0061] When the hot airflow is blown out from the preheating hole 12, it will loosen and disturb the raw material falling in the feed pipe 4, which can prevent the raw material from accumulating and clumping, and keep the raw material in a loose falling state. This not only further improves the heat penetration effect, but also makes the feeding smoother and avoids clogging the feed pipe 4, while ensuring that the raw material enters the raw material conveying box 3 at a uniform speed.

[0062] As the plastic raw material falls into the feeding tube 4, the drive servo motor is activated, and the output shaft of the drive servo motor drives the drive shaft to rotate. During the rotation of the drive shaft, the drive shaft drives the gear 24 to rotate, and during the rotation of the gear 24, the rack meshes with the gear 24, and the rack can drive the pusher block 6 to reciprocate along the length of the feeding tube 4.

[0063] During the movement of booster block 6, propulsion block 7 moves synchronously, which in turn allows propulsion block 7, which moves back and forth along the length of raw material conveying box 3, to continuously stir and push the accumulated raw materials, break the bridging structure, and always ensure smooth material feeding, avoiding production continuity caused by material blockage or interruption.

[0064] During the reciprocating motion of the push block 7, the turning block 9 can continuously turn the raw material in the feed pipe 4, allowing the already heated raw material on the outside and the insufficiently heated raw material inside to continuously exchange and mix, making the temperature of the whole batch of raw materials more uniform, solving the problem of internal and external temperature difference that occurs when the fixed guide hole is preheated, and improving the overall preheating consistency.

[0065] Furthermore, the equidistantly distributed flipping blocks 9 have a buffering and diversion effect on the falling raw materials, which can prevent the raw materials from falling rapidly in a concentrated manner and allow the raw materials to be evenly distributed vertically along the feed pipe 4. This ensures that each batch of raw materials receives sufficient preheating time and makes the discharge speed more stable, without fluctuations between fast and slow, thus helping to stabilize production in the subsequent injection molding process.

[0066] By completing preheating and other pretreatments in the plastic raw material transportation process, the temperature of the raw material is more stable when it enters the injection molding operation box 2, the melting and plasticizing effect is more uniform, and the problems of internal stress and warping in the finished product are reduced, thereby enabling the injection molding mechanism to perform efficient injection molding of plastic raw materials.

[0067] When the wall vibrating block 14 moves with the pusher block 7, it can knock off the adhering material by vibrating and hitting the pipe wall, keeping the pipe wall clean at all times. This not only prevents the material from accumulating and blocking the feeding channel, but also ensures that the hot airflow can be smoothly transferred to the falling raw material, maintaining a stable preheating efficiency.

[0068] At the same time, the vibration of the pipe wall will cause the entire layer of raw material in the feed pipe 4 to loosen slightly, increasing the gap between the raw material particles. This makes it easier for hot air to penetrate into the interior of the raw material, improving heat transfer efficiency and allowing the raw material to be preheated to the target temperature more quickly. This further shortens the preheating and subsequent injection molding cycle and improves overall production efficiency.

[0069] During the synchronous movement of the connecting flip block 15 with the push block 7, when the side slider 26 abuts against the fixed rod, and when the connecting flip block 15 abuts against the inner wall of the feed tube 4, the connecting flip block 15 can then perform a lateral reciprocating motion relative to the push block 7.

[0070] The connecting block 15 can reciprocate relative to the push block 7. In conjunction with the overall movement of the push block 7, it can perform layered knocking and disturbance of agglomerates and bridging at different locations. When the push block 7 reciprocates as a whole, it drives the connecting block 15 to move as a whole. The independent movement of the connecting block 15 itself can also loosen stubborn accumulated materials in a targeted manner. The breaking effect is more thorough than that of the single push block 7, and completely avoids the blockage of high-viscosity raw materials.

[0071] The arc-shaped structure of the connecting flipping arc groove can guide the hot airflow to flow and diffuse between the raw material particles when flipping the raw material, increasing the penetration range of the hot airflow. At the same time, the reciprocating motion of the connecting flipping block 15 will continuously change the gap between the raw materials, allowing the hot airflow to be exchanged more fully, further accelerating the preheating speed and shortening the overall processing cycle.

[0072] During the lateral reciprocating motion of the connecting arc groove relative to the propulsion block 7, the arc block abuts against the trough and crest of the connecting arc groove, thereby enabling the flipping block 9 to reciprocate relative to the propulsion block 7 under the combined action of the arc block and the first torsion spring.

[0073] When the raw material density is high, the turning block 9 will automatically swing as it moves forward due to the resistance of the raw material, which will allow it to cut into a deeper layer of raw material instead of staying on the surface and pushing the raw material. This can effectively break up the deep compacted clumps and allow the entire layer of raw material to be fully turned over.

[0074] During the oscillation of the tumbling block 9, additional irregular small-amplitude turbulence is generated, which promotes more thorough diffusion and mixing of hot air between raw material particles, allowing the hot air to penetrate deep into the gaps of the raw material accumulation, reducing the temperature difference between the inner and outer layers of raw materials, and improving the preheating uniformity more significantly than when the tumbling block 9 is fixed.

[0075] During the reciprocating motion of the propulsion block 7, the linkage tube 17 is able to swing relative to the guide tube 11 under the combined action of the propulsion block 7 and the second torsion spring.

[0076] During the swinging process, the linkage tube 17 will actively stir the loose raw materials and open up the gaps between the raw material particles. The airflow channels that were originally compacted and blocked are opened, and the hot airflow can more easily penetrate into the interior of the raw material pile, instead of just flowing on the surface. This greatly improves the penetration efficiency of the hot airflow, and the deep raw materials can also be sufficiently heated.

[0077] Side flow holes 18 are symmetrically arranged on both sides of the linkage pipe 17. Together with the original two end face air outlets, hot air can be discharged from multiple directions at the same time, forming a three-dimensional air outlet effect, covering the raw materials in all areas around the linkage pipe 17, completely eliminating dead air outlets, and allowing raw materials in any position to come into contact with hot air.

[0078] Furthermore, during the swing of the linkage pipe 17, the side flow holes 18 on both sides will always sweep across the raw materials at different positions: when swinging to the left, the left side flow hole 18 fully contacts the raw materials, and when swinging to the right, the right side flow hole 18 releases air for heating. Throughout the process, the hot airflow can be directly applied to the raw materials, and the airflow efficiency will not decrease due to the swing. On the contrary, the swing expands the effective range of the side flow holes 18 and enhances the penetration effect of the hot airflow into the raw materials.

[0079] During the swing of the power rod 30 with the linkage tube 17, the power rod 30, through the combined action of the linkage block 29 and the third torsion spring, enables the adjustment auxiliary plate 19 to swing relative to the linkage tube 17 within the linkage tube 17.

[0080] When the linkage pipe 17 swings, the air outlet direction will shift with the swing of the pipe body. The adjustment auxiliary plate 19 can swing in the opposite direction to counteract the shift, so that the hot airflow is always sprayed towards the raw material accumulation area. The pipe body swing will not cause some areas to not be hit by hot air, and the uniform directional coverage will always be maintained.

[0081] When the auxiliary plate 19 swings, it will disperse the concentrated mainstream airflow in the pipe and divert it to each side flow hole 18, so that each side flow hole 18 can obtain a stable airflow direction, avoid large flow concentrated from a few holes, ensure that the direction of all air outlets is stable and controllable, further eliminate the preheating blind zone, and improve the overall preheating uniformity.

[0082] Fine particles and molten debris from plastic raw materials can easily get stuck in the side flow holes 18, causing poor airflow. The side flow holes 18 are located on the movement trajectory of the brush 20. Every time the adjustment auxiliary plate 19 swings, the brush 20 will clean the corresponding side flow holes 18, which can promptly remove the raw material debris stuck in the holes, thus preventing the side flow holes 18 from becoming clogged and ensuring that all side flow holes 18 can ventilate normally in the long term.

[0083] During the swing of the linkage tube 17, the slider 21, driven by the connecting rod 22, is able to reciprocate along the length of the guide tube 11. During the reciprocating motion of the slider 21, the auxiliary tube 23, under the combined action of the slider 21 and the fourth torsion spring, is able to swing relative to the preheating hole 12.

[0084] The preheating hole 12 is located on the surface of the fixed guide pipe 11, and the air outlet position is fixed. The area between the guide pipe 11 and the wall of the feed pipe 4 is prone to becoming a hot air blind zone. After the side auxiliary pipe 23 extends from the preheating hole 12, it can directly guide the hot airflow to the blind zone position, so that the raw materials in the edge area can also be fully heated, completely eliminating the preheating dead corner of the entire cross section. The side auxiliary pipe 23 can change the air outlet direction with swinging, and can actively sweep over the raw materials in different positions. With its own swinging disturbance of the raw material particles, it opens up the gaps between the raw materials, making it easier for the hot airflow to penetrate.

[0085] Meanwhile, during the swinging process of the side auxiliary pipe 23, it will continuously scrape the opening of the preheating hole 12, bringing out the raw material debris stuck to the opening, reducing the accumulation of raw material at the opening, reducing the probability of blockage of the preheating hole 12 from the root, and ensuring the stable air volume of the preheating hole 12 in the long term.

[0086] In summary, the dynamic air outlet design achieves uniform coverage and efficient utilization of hot airflow across the entire cross-section. Combined with multi-level material disturbance and full-chain automatic anti-clogging and cleaning design, it not only significantly shortens the preheating cycle and reduces heating energy consumption, but also significantly improves the uniformity of material preheating and the continuity of material feeding. At the same time, it fully removes moisture from the raw materials to ensure the quality of subsequent injection molding, and reduces the frequency of manual maintenance and component wear. It brings systematic benefits to large-scale injection molding production from three dimensions: capacity, quality, and production cost.

[0087] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An injection molding machine for plastic injection molding, comprising a fixed base, characterized in that: It also includes an injection molding control box, a raw material conveying box, a discharge pipe, a feeding hopper, a preheating mechanism, an injection molding mechanism installed in the injection molding control box for injection molding, and a conveying mechanism installed in the raw material conveying box for conveying raw materials; both the injection molding control box and the raw material conveying box are fixedly connected to a fixed base; both ends of the discharge pipe are connected to the raw material conveying box and the feeding hopper, respectively; the preheating mechanism includes a booster block, a propulsion block, an air heat conduction component, several equidistant tilting components arranged along the width direction of the discharge pipe, several gas guiding components arranged equidistantly along the width direction of the discharge pipe, and sliding holes opened on the discharge pipe. A drive assembly for driving the booster block to reciprocate along the length of the raw material conveying box; the booster block is slidably connected to the sliding hole; the propulsion block is located inside the feed pipe and is fixedly connected to the booster block; the flipping assembly includes several flipping blocks equidistantly arranged along the length of the propulsion block; the flipping blocks are connected to the propulsion block; the air heat conduction assembly is fixedly connected to the outer wall of the feed pipe; the gas guiding assembly includes a guide pipe, a guide hole opened on the feed pipe, and a group of preheating holes equidistantly opened on the guide pipe along the length of the guide pipe; the guide pipe is connected to the guide hole; the guide hole is connected to the exhaust port of the air heat conduction assembly.

2. The injection molding equipment for plastic injection molding according to claim 1, characterized in that: The flipping assembly also includes wall vibration blocks symmetrically arranged on both sides of the propulsion block along the length of the propulsion block; the wall vibration blocks are fixedly connected to the propulsion block.

3. The injection molding equipment for plastic injection molding according to claim 2, characterized in that: The push block has a cavity, and the wall vibrating block has an inner sliding hole that communicates with the cavity. The flipping assembly also includes several connecting flipping parts that are equidistantly arranged along the length of the push block. The connecting flipping part includes a connecting flipping block, a side hole on the feed pipe, several connecting flipping arc grooves that are equidistantly arranged along the length of the connecting flipping block, and a power unit for driving the connecting flipping block to reciprocate relative to the push block. The connecting flipping block passes through the cavity, the side hole, and the inner sliding hole respectively, and the connecting flipping block is slidably connected to the cavity.

4. The injection molding equipment for plastic injection molding according to claim 3, characterized in that: The flipping assembly also includes several auxiliary parts equidistantly arranged along the length of the propulsion block; the auxiliary parts include an auxiliary shaft, a first torsion spring, an arc-shaped block, and a top hole opened on the chamber; the auxiliary shaft is rotatably connected to the chamber; the two ends of the first torsion spring are respectively connected to the auxiliary shaft and the chamber; the flipping block passes through the top hole and extends into the chamber, and the flipping block is fixedly connected to the auxiliary shaft; the arc-shaped block is fixedly connected to the flipping block, and the arc-shaped block abuts against the connecting flipping arc groove.

5. An injection molding equipment for plastic injection molding according to claim 1, characterized in that: It also includes several linkage guide components equidistantly arranged along the width direction of the feed pipe; the linkage guide components include several linkage guide parts equidistantly arranged along the length direction of the guide pipe; the linkage guide parts include a linkage shaft, a second torsion spring, a linkage pipe, a hose, and several side flow holes symmetrically opened on the linkage pipe along the length direction of the linkage pipe; the linkage shaft is rotatably connected to the guide pipe; the two ends of the second torsion spring are respectively connected to the linkage shaft and the guide pipe; the linkage pipe is fixedly connected to the linkage shaft and is located on the movement trajectory of the push block; the two ends of the hose are respectively connected to the guide pipe and the linkage pipe.

6. An injection molding equipment for plastic injection molding according to claim 5, characterized in that: The linkage guide section also includes an adjustment auxiliary unit installed inside the linkage pipe; the adjustment auxiliary unit includes an inner shaft, an adjustment auxiliary plate, and a power component for driving the adjustment auxiliary plate to swing; the inner shaft is rotatably connected to the linkage pipe; the adjustment auxiliary plate is fixedly connected to the inner shaft.

7. An injection molding equipment for plastic injection molding according to claim 6, characterized in that: The adjustment auxiliary unit also includes several perforated brushes symmetrically arranged on both sides of the adjustment auxiliary plate; the perforated brushes are fixedly connected to the adjustment auxiliary plate, and the side flow holes are located on the movement trajectory of the perforated brushes.

8. An injection molding equipment for plastic injection molding according to claim 4, characterized in that: The drive assembly includes a drive shaft, a gear, a rack, a bottom groove on the pusher block, and a drive component for rotating the drive shaft; the drive shaft is rotatably connected to the outer wall of the feed tube; the gear is fixedly connected to the drive shaft; the rack is fixedly connected to the bottom groove, and the rack meshes with the gear.

9. An injection molding equipment for plastic injection molding according to claim 8, characterized in that: It also includes auxiliary components; the auxiliary components include a fixed block, a fixed rod, a side slider, and a fixed groove on the fixed block; the fixed block is fixedly connected to the outer wall of the feed pipe; the fixed rod is fixedly connected to the fixed groove, and the fixed rod is located on the movement trajectory of the side slider; the side slider is slidably connected to the fixed groove; the power unit is a power block; the two ends of the power block are fixedly connected to the connecting block and the side slider, respectively.

10. An injection molding equipment for plastic injection molding according to claim 6, characterized in that: It also includes a linkage unit; the linkage unit includes several linkage components equidistantly arranged along the width direction of the feed tube; the linkage components include a linkage rod and several linkage block groups equidistantly arranged along the length direction of the linkage rod; the linkage rod is fixedly connected to the inner wall of the feed tube; the linkage block group includes linkage blocks symmetrically arranged on both sides of the linkage tube; the linkage blocks are fixedly connected to the linkage rod; the power component includes a third torsion spring and a power rod; the two ends of the third torsion spring are respectively connected to the inner shaft and the linkage tube; the power rod is fixedly connected to the adjustment auxiliary plate, and the linkage block is located on the movement trajectory of the power rod.

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