Hydraulic-motor-free efficient energy-saving injection molding machine driven by synchronous belt

Abstract

The utility model discloses a synchronous belt drive hydraulic-motor-free efficient energy-saving injection molding machine which comprises a glue injection assembly, and the glue injection assembly comprises a glue injection head plate mounted on an injection table base, a second glue injection plate movably arranged on the injection table base, a charging barrel mounted on the glue injection head plate in a penetrating manner and a screw rod positioned in the charging barrel; a synchronous belt glue melting mechanism is mounted on the second glue injection plate; the synchronous belt glue melting mechanism comprises a glue melting motor, a small gear and a glue melting large gear; a transmission shaft connected with the screw rod is arranged on the second glue injection plate in a penetrating manner; one end of the transmission shaft away from the screw is in transmission connection with the melt glue bull gear; according to the utility model, a hydraulic motor is replaced by the synchronous belt system driven by the motor, so that higher energy efficiency and higher response speed are realized, and the glue melting motor is in transmission connection with the gear through the synchronous belt system, so that the glue melting assembly can be driven with higher efficiency and stability; specifically, the synchronous pulley is stable in transmission, and the energy consumption is greatly reduced; and by optimizing the heat dissipation structure, the overheating risk of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine. Background Art

[0002] An injection molding machine is a common piece of equipment used to mold thermoplastics or thermosetting plastics into various shapes. The machine's operating principle is to melt and pressurize solid plastic pellets or powder through the rotation of a screw, inject the pressurized plastic into a mold through a nozzle, and then cool the resulting product. This process requires an efficient and stable power source to drive the screw. Traditional melt molding equipment typically uses a hydraulic motor as its power source, driven by a hydraulic system.

[0003] Although hydraulic motors have been widely used in injection molding machines, their problems are becoming increasingly apparent. First, the hydraulic motor's slow response speed affects the efficiency of the injection molding machine, resulting in extended production cycles and reduced production efficiency. Second, the hydraulic motor's hydraulic pump and hydraulic motor consume a large amount of electricity during operation, resulting in low efficiency and high energy consumption. This not only increases the operating cost of the injection molding machine but also wastes energy. In addition, because the hydraulic system needs to maintain a high pressure state, the hydraulic motor also generates a large amount of heat during operation. If this heat is not effectively dissipated, it will damage the hydraulic motor itself and shorten its service life. Finally, the hydraulic motor will also leak hydraulic oil during operation, which not only pollutes the environment but may also harm the health of the operator.

[0004] Therefore, further research and development is needed to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0005] Therefore, in order to solve the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a hydraulic motor-free high-efficiency energy-saving injection molding machine with synchronous belt drive.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A high-efficiency and energy-saving injection molding machine with a synchronous belt drive and no hydraulic motor, comprising a movable shooting platform base; a glue injection assembly is provided on the shooting platform base; the glue injection assembly comprises a glue injection head plate mounted on the shooting platform base, a second glue injection plate movably provided on the shooting platform base, a barrel mounted on the glue injection head plate, and a screw located in the barrel; a synchronous belt glue melting mechanism is mounted on the second glue injection plate; the synchronous belt glue melting mechanism comprises a glue melting motor, a glue melting pinion transmission-connected to the output shaft of the glue melting motor, and a glue melting gear; the glue melting pinion and the glue melting gear are connected via a synchronous belt drive; a transmission shaft connected to the screw is provided through the second glue injection plate; the end of the transmission shaft away from the screw is transmission-connected to the glue melting gear.

[0008] Furthermore, a transversely penetrating assembly cavity is provided in the second injection molding plate, and the transmission shaft is rotatably arranged in the assembly cavity through a first bearing and a second bearing.

[0009] Furthermore, one end of the transmission shaft away from the screw is tightly connected to the center of the wheel disc of the melt glue gear and rotates under the rotation of the melt glue gear.

[0010] Furthermore, an axial blind hole is provided at one end of the transmission shaft connected to the screw rod, and one end of the screw rod connected to the transmission shaft extends into the blind hole and is locked with the transmission shaft through an arc-shaped pressure plate.

[0011] Furthermore, a third bearing is provided at the opening of one end of the assembly cavity close to the screw, and a bearing cover is tightly provided on the outside of the third bearing; the first bearing is a thrust ball bearing, the second bearing is a deep groove ball bearing; and the third bearing is a tapered roller bearing.

[0012] Furthermore, a V-shaped support portion is provided on the second injection molding plate, and the melt molding motor is mounted on the support portion through a motor fixing plate, and its output shaft passes through the motor fixing plate and is connected to the melt molding pinion.

[0013] Furthermore, the melt-adhesive motor is a servo motor, and a heat dissipation structure is provided at the end of the melt-adhesive motor; the heat dissipation structure includes a heat dissipation frame arranged around the end of the melt-adhesive motor and a plurality of heat dissipation fans arranged on the side walls of the heat dissipation frame.

[0014] Furthermore, a shot-jet oil cylinder is provided on both sides of the barrel on the shot-jet head plate; the cylinder body of the shot-jet oil cylinder is fixed on the shot-jet head plate, and its cylinder piston rod passes through the two shot-jet plates horizontally and is fastened to the two shot-jet plates through a locking nut.

[0015] Furthermore, the injection molding machine also includes an injection guide rail, and the shooting platform base can move back and forth along the injection guide rail; the upper surface of the shooting platform base is provided with an injection guide rail, and the second injection plate can move back and forth along the injection guide rail.

[0016] Compared with the prior art, the beneficial effects of the present invention are at least in the following aspects:

[0017] 1. This utility model achieves higher energy efficiency and faster response speed by replacing the hydraulic motor with an electric motor-driven synchronous belt system. The melt-melting motor is connected to the gear drive through the synchronous belt system, which can drive the melt-melting assembly with higher efficiency and stability. Specifically, the synchronous belt pulley has stable transmission and low loss, which greatly reduces energy consumption and reduces the energy consumption of the entire machine by 5%. At the same time, the synchronous belt drive reduces pressure fluctuations and leakage problems in the hydraulic system, reduces wear on mechanical components, and reduces maintenance requirements.

[0018] 2. The present invention further improves the heat dissipation structure of the melt motor by moving the motor's cooling fan from the back to the side. This can more effectively dissipate the heat generated by the motor and avoid the situation where the barrel heat is brought to the rear of the motor, thereby reducing the risk of motor overheating and extending the service life of the motor. At the same time, by optimizing the heat dissipation structure, the length of the motor can be shortened, which not only saves space but also reduces the overall size of the equipment, making the overall device more compact.

[0019] 3. Through the dual-line rail design of the injection guide and the injection guide, the upper injection guide is responsible for accurately guiding the movement of the second injection plate, while the lower injection platform guide supports the movement of the injection platform base. This shares the movement load, effectively reduces the friction resistance during the movement, and makes the overall movement smoother. Furthermore, the double-layer guide rail design allows each layer of guide rail to focus on its specific movement task, reducing the movement deviation caused by the overload of a single guide rail system, and improving the overall movement accuracy of the injection molding machine.

[0020] 4. The utility model replaces the hydraulic motor with a synchronous belt system driven by an electric motor, thereby improving energy efficiency and response speed and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency energy-saving injection molding machine with a synchronous belt drive and no hydraulic motor according to a preferred embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of a high-efficiency energy-saving injection molding machine without a hydraulic motor and with a synchronous belt drive according to a preferred embodiment of the present invention from another angle;

[0023] Figure 3 This is a vertical cross-sectional diagram of the overall structure of a high-efficiency energy-saving injection molding machine with synchronous belt drive and no hydraulic motor according to a preferred embodiment of the present invention;

[0024] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at center A;

[0025] Figure 5 This is a schematic transverse cross-sectional view of the overall structure of a high-efficiency energy-saving injection molding machine with synchronous belt drive and no hydraulic motor according to a preferred embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the overall structure of the synchronous belt melting mechanism of a hydraulic motor-free high-efficiency energy-saving injection molding machine with synchronous belt drive in a preferred embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram from another angle of the overall structure of the synchronous belt melting mechanism of the hydraulic motor-free high-efficiency energy-saving injection molding machine with synchronous belt drive according to a preferred embodiment of the present invention;

[0028] Figure 8 This is a schematic cross-sectional diagram of the overall structure of the synchronous belt melting mechanism of a hydraulic motor-free high-efficiency energy-saving injection molding machine with synchronous belt drive according to a preferred embodiment of the present invention.

[0029] In the picture:

[0030] 1. Shooting platform base; 11. Injection guide rail; 2. Injection assembly; 21. Injection head plate; 22. Second injection plate; 221. Assembly chamber; 23. Barrel; 24. Screw; 25. Arc pressure plate; 26. Support; 3. Synchronous belt melting mechanism; 31. Melting motor; 32. Melting pinion; 33. Melting gear; 331. Wheel; 34. Synchronous belt; 35. Drive shaft; 351. Blind hole; 36. Motor fixing plate; 37. Heat dissipation structure; 371. Heat dissipation rack; 372. Cooling fan; 4. First bearing; 5. Second bearing; 6. Third bearing; 7. Bearing gland; 8. Injection cylinder; 81. Cylinder body; 82. Cylinder piston rod; 83. Locking nut; 9. Shooting guide rail. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings and examples. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0032] like Figure 1-8As shown, the utility model provides a hydraulic motor-free high-efficiency and energy-saving injection molding machine with synchronous belt drive, comprising a movable shooting platform base 1; a glue injection assembly 2 is provided on the shooting platform base 1; the glue injection assembly 2 comprises a glue injection head plate 21 mounted on the shooting platform base 1, a second glue injection plate 22 movably arranged on the shooting platform base 1, a barrel 23 installed on the glue injection head plate 21 and a screw 24 located in the barrel 23; a synchronous belt glue melting mechanism 3 is installed on the second glue injection plate 22; the synchronous belt glue melting mechanism 3 comprises a glue melting motor 31, a glue melting pinion 32 connected to the output shaft of the glue melting motor 31, and a glue melting gear 33; the glue melting pinion 32 and the glue melting gear 33 are connected to each other through a synchronous belt 34; a transmission shaft 35 connected to the screw 24 is provided through the second glue injection plate 22; the end of the transmission shaft 35 away from the screw 24 is connected to the glue melting gear 33.

[0033] One end of the transmission shaft 35 away from the screw rod 24 is tightly connected to the center of the wheel disc 331 of the large melt glue gear 33 and rotates when the large melt glue gear 33 rotates.

[0034] In this embodiment, the shooting platform base is driven by the shooting drive mechanism (not shown in the drawings) to push the injection mechanism and the synchronous belt melting mechanism as a whole toward the clamping mechanism. Then, the two injection plates are driven forward by the injection cylinder to complete the injection action. The melting motor drives the transmission shaft to rotate through the melting pinion, synchronous belt and melting gear, thereby driving the screw to rotate and perform the melting and plasticizing operation of the plastic.

[0035] The utility model achieves higher energy efficiency and faster response speed by replacing the hydraulic motor with a synchronous belt system driven by an electric motor. The melt glue motor is connected to the gear transmission through the synchronous belt system, which can drive the melt glue component with higher efficiency and stability. Specifically, the synchronous belt pulley transmission is stable and has low loss, which greatly reduces energy consumption and reduces the energy consumption of the whole machine by 5%. At the same time, the synchronous belt drive reduces pressure fluctuations and leakage problems in the hydraulic system, reduces wear of mechanical parts, and reduces maintenance requirements.

[0036] Specifically, the second injection molding plate 22 is provided with a transversely extending assembly cavity 221, and the drive shaft 35 is rotatably mounted within the assembly cavity 221 via a first bearing 4 and a second bearing 5. Furthermore, a third bearing 6 is positioned at the opening of the assembly cavity 221 near the screw 24, with a bearing gland 7 secured to the outside of the third bearing 6. The first bearing 4 is a thrust ball bearing, the second bearing 5 is a deep groove ball bearing, and the third bearing 6 is a tapered roller bearing. The advantage of this design is that the thrust ball bearing handles axial loads, the tapered roller bearing handles combined radial and axial loads, and the deep groove ball bearing supports radial loads, reducing friction and vibration and improving operational efficiency and equipment stability.

[0037] Preferably, an axial blind hole 351 is provided at the end of the drive shaft 35 connected to the screw rod 24. The end of the screw rod 24 connected to the drive shaft 35 extends into the blind hole 351 and is locked to the drive shaft 35 via the arc-shaped pressure plate 25. Specifically, in this embodiment, the arc-shaped pressure plate is a double half-moon-shaped pressure plate that is butted together on the left and right sides. During assembly, the ends of the screw rod 24 connected to the drive shaft are butted together and locked.

[0038] Preferably, a V-shaped support portion 26 is provided on the second injection molding plate 22 , and the melt molding motor 31 is mounted on the support portion 26 via a motor fixing plate 36 , and its output shaft passes through the motor fixing plate 36 and is connected to the melt molding pinion 32 .

[0039] Preferably, the melt motor 31 is a servo motor, and a heat dissipation structure 37 is provided at the end of the melt motor 31. The heat dissipation structure 37 includes a heat dissipation frame 371 surrounding the end of the melt motor 31 and a plurality of cooling fans 372 disposed on the side walls of the heat dissipation frame 371. In this embodiment, the heat dissipation structure of the melt motor is improved, and the cooling fans are moved from the back to the side of the motor. This can more effectively dissipate heat generated by the motor, preventing heat from the barrel from being transferred to the rear of the motor, thereby reducing the risk of motor overheating and extending the motor's service life. Furthermore, by optimizing the heat dissipation structure, the length of the motor is shortened, which not only saves space but also reduces the overall size of the device, making the entire device more compact.

[0040] Preferably, a spraying cylinder 8 is provided on both sides of the barrel 23 on the spraying head plate 21. The cylinder body 81 of the spraying cylinder 8 is fixed to the spraying head plate 21, and its cylinder piston rod 82 extends transversely through the second spraying plate 22 and is fastened to the second spraying plate 22 via a locking nut 83. During operation, the cylinder piston rod drives the second spraying plate 22 to move back and forth.

[0041] Furthermore, the injection molding machine further includes a shift guide rail 9, along which the shooting platform base 1 can reciprocate; a glue injection guide rail 11 is provided on the upper surface of the shooting platform base 1, along which the second glue injection plate 22 can reciprocate. In this embodiment, through the dual-line design of the shift guide rail and the glue injection guide rail, the upper glue injection guide rail is responsible for precisely guiding the movement of the second glue injection plate, while the lower platform guide rail supports the movement of the shooting platform base. This shares the motion load, effectively reducing frictional resistance during motion and making the overall motion smoother. Furthermore, the double-layer guide rail design allows each layer of guide rail to focus on its specific motion task, reducing motion deviation caused by overloading a single guide rail system and improving the overall motion accuracy of the injection molding machine.

[0042] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine, characterized in that: It comprises a movable shooting platform base; a glue injection assembly is provided on the shooting platform base; the glue injection assembly comprises a glue injection head plate mounted on the shooting platform base, a second glue injection plate movably arranged on the shooting platform base, a barrel mounted on the glue injection head plate, and a screw located in the barrel; a synchronous belt glue melting mechanism is installed on the second glue injection plate; the synchronous belt glue melting mechanism comprises a glue melting motor, a glue melting pinion transmission-connected to the output shaft of the glue melting motor, and a glue melting gear; the glue melting pinion and the glue melting gear are connected via a synchronous belt transmission; a transmission shaft connected to the screw is provided through the second glue injection plate; the end of the transmission shaft away from the screw is transmission-connected to the glue melting gear.

2. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 1, characterized in that: A transversely penetrating assembly cavity is provided in the second injection molding plate, and the transmission shaft is rotatably arranged in the assembly cavity through a first bearing and a second bearing.

3. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 2, characterized in that: One end of the transmission shaft away from the screw is tightly connected to the center of the wheel disc of the melt glue gear and rotates under the rotation of the melt glue gear.

4. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 2, characterized in that: An axial blind hole is provided at one end of the transmission shaft connected to the screw rod, and one end of the screw rod connected to the transmission shaft extends into the blind hole and is locked with the transmission shaft through an arc-shaped pressing plate.

5. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 2, characterized in that: A third bearing is provided at the opening of one end of the assembly cavity close to the screw, and a bearing cover is tightly provided on the outside of the third bearing; the first bearing is a thrust ball bearing, the second bearing is a deep groove ball bearing; and the third bearing is a tapered roller bearing.

6. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 4, characterized in that: The second injection molding plate is provided with a V-shaped supporting portion, the melt molding motor is mounted on the supporting portion via a motor fixing plate, and its output shaft passes through the motor fixing plate and is connected to the melt molding pinion.

7. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 6, characterized in that: The melt-adhesive motor is a servo motor, and a heat dissipation structure is provided at the end of the melt-adhesive motor; the heat dissipation structure includes a heat dissipation frame arranged around the end of the melt-adhesive motor and a plurality of heat dissipation fans arranged on the side walls of the heat dissipation frame.

8. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 1, characterized in that: The injection head plate is provided with injection cylinders on both sides of the barrel; the cylinder body of the injection cylinder is fixed on the injection head plate, and its cylinder piston rod passes through the two injection plates horizontally and is fastened to the two injection plates through a locking nut.

9. The synchronous belt driven, hydraulic motor-free, high-efficiency, energy-saving injection molding machine according to claim 1, characterized in that: The injection molding machine further comprises an injection guide rail, along which the injection platform base can reciprocate; an injection guide rail is provided on the upper surface of the injection platform base, along which the second injection plate can reciprocate.

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