Rotating disc synchronous belt type servo motor driving mechanism and vertical injection molding machine

Abstract

The invention discloses a rotary table synchronous belt type servo motor driving mechanism and a vertical injection molding machine, the rotary table synchronous belt type servo motor driving mechanism comprises a mold locking unit and a rotary table assembly which are integrally arranged, the mold locking unit comprises a mold plate assembly and a mold locking mechanism, the mold plate assembly is internally provided with a center mold locking machine column coaxial with the center of a rotary table, and the mold locking mechanism is arranged on the rotary table assembly. The rotating disc assembly comprises a rotating disc and an adjustable rotating disc synchronous belt type servo motor driving mechanism for driving the rotating disc to rotate around the central mold locking machine column; and the mold locking mechanism comprises an adjustable mold closing synchronous belt type servo motor driving mechanism and a mold closing screw rod transmission mechanism. A synchronous belt type servo motor is adopted for driving, a lead screw transmission mechanism is matched to achieve cylinder-free driving, oil leakage pollution risks are avoided, high-precision positioning and accurate transmission without sliding can be achieved, a synchronous belt is in flexible transmission, the service life is long, different belt wheels and different synchronous belts can be replaced according to needs, and different rotating speed and torque requirements can be met. Performance of the injection molding machine is improved, production efficiency is high, and stability is good.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding machines, in particular to a rotary table synchronous belt type servo motor driving mechanism and a vertical injection molding machine. BACKGROUND

[0002] An injection molding machine, also known as an injection molding machine or an injection machine, is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using a plastic molding mold. With the rapid development of the injection molding machine industry, the industry technology is becoming more and more mature.

[0003] In the prior art, the injection molding machine generally uses a servo rotary table motor for driving, and the servo rotary table motor is driven by a gear transmission. The gear transmission makes the cost high. Moreover, the gear transmission is sensitive to the inertia change of the load, and the impact load will affect the performance. The applicability of the gear transmission is poor, and different pinion gears and entire lower mold plates need to be replaced for different speed and torque requirements (the installation position of the different pinion gears will change), which is extremely costly.

[0004] In order to solve the above problems existing in the gear transmission, the applicant previously applied for a Chinese patent document CN214163766U, a synchronous belt transmission vertical rotary table injection molding machine, including a rack, an injection assembly and an upper mold plate are installed on the upper part of the rack, a mold cylinder assembly and a lower mold plate are installed on the lower part of the rack, a rotary table assembly is provided on the lower mold plate, the rotary table assembly includes a rotary table, a rotary table shaft and a servo motor, the rotary table shaft is fixed in the middle of the lower mold plate, the servo motor is fixed on one side of the lower mold plate, a main synchronous pulley is provided on the rotating shaft of the servo motor, a secondary synchronous pulley connected by a bearing is provided on the rotary table shaft, the main synchronous pulley and the secondary synchronous pulley are connected by a synchronous belt, and the rotary table is fixed on the top surface of the secondary synchronous pulley. In the above technical solution, the rotary table assembly of the injection molding machine is driven by the servo motor through the synchronous belt transmission to drive the rotary table to rotate. The flexible buffer transmission of the synchronous belt replaces the rigid impact transmission of the gear, reduces the noise of the machine, and prolongs the service life of the related machine parts.

[0005] However, the use of this technical solution only solves the transmission problem of the rotary table assembly, but the entire injection molding machine still has the problems of low stability of the hydraulic cylinder driving transmission, the risk of hydraulic oil leakage and pollution, and the transmission efficiency of the injection molding machine is not high due to the use of the hydraulic cylinder driving. It cannot meet the requirements of different speeds and torques, has high maintenance cost, and has high noise. SUMMARY

[0006] The purpose of the present application is to solve the problems of the existing injection molding machine, such as low transmission stability, risk of hydraulic cylinder leakage and pollution, low transmission efficiency, inability to meet different speed and torque requirements, high maintenance cost, and high noise, and to provide a rotary table synchronous belt servo motor driving mechanism and a vertical injection molding machine, which adopts a synchronous belt servo motor driving mechanism to cooperate with a screw transmission mechanism to realize cylinder-free driving screw precise transmission for each unit, and the synchronous belt servo motor driving mechanism is adjustable, meeting different speed and torque requirements, having high integration, good transmission stability, high efficiency, low cost, and low noise.

[0007] The technical scheme adopted by the present application to achieve the purpose of the present application is: a rotary table synchronous belt servo motor driving mechanism, comprising an integrated mold locking unit and a rotary table assembly, the mold locking unit comprises a mold plate assembly and a mold locking mechanism, the mold plate assembly is provided with a center mold locking machine column coaxial with the center of the rotary table, the rotary table assembly comprises a rotary table and an adjustable rotary table synchronous belt servo motor driving mechanism for driving the rotary table to rotate around the center mold locking machine column, and the mold locking mechanism comprises an adjustable mold clamping synchronous belt servo motor driving mechanism and a mold clamping screw transmission mechanism. The rotary table synchronous belt servo motor driving mechanism, the mold locking unit and the rotary table assembly are highly integrated, one of the mold locking machine columns in the mold plate assembly is set as the center mold locking machine column serving as the center shaft of the rotary table, the high integration of the rotary table and the mold locking unit is realized, the rotary table is driven to rotate around the center mold locking machine column by the rotary table synchronous belt servo motor driving mechanism, the center mold locking machine column plays a guiding role during the mold locking process, the center mold locking machine column is shared, the high integration is realized, and the stability of transmission and mold locking is ensured, the mold clamping mechanism is also driven by the adjustable mold clamping synchronous belt servo motor driving mechanism to drive the mold clamping screw transmission mechanism to perform mold opening and closing movement, the transmission stability is good, a certain axial distance deviation can be adapted, a certain elasticity is provided, a buffering effect can be achieved, meanwhile, the adjustable setting is adopted, the pulleys of the synchronous belt can be adjusted within a certain range, the application range is wider. Different pulleys and synchronous belts can be replaced according to needs to meet different speed and torque requirements, the pulley structure installation and maintenance and replacement are simpler, and the cost is lower. More importantly, the mold locking unit and the rotary table assembly are driven by the cylinder-free synchronous belt servo motor driving mechanism, the risk of hydraulic cylinder leakage and pollution is avoided, the stability is good, the noise is low, the deficiencies of the existing injection molding machine hydraulic cylinder transmission are effectively solved, the adjustable, elastic controllable, efficient, and pollution-free effects are realized.

[0008] As a preferred, the mold plate assembly includes an upper mold plate, a lower mold plate and a locking lower mold plate connected by a set of locking machine columns, the center of the upper mold plate is provided with a screw barrel injection center hole, the center of the locking lower mold plate is provided with a center locking screw rod mounting hole, and the center of the lower mold plate is provided with a weighing sensor mounting hole, and the screw barrel injection center hole, the center locking screw rod mounting hole and the weighing sensor mounting hole are coaxial. In order to realize high integration, the mold plate assembly is connected by a set of locking machine columns arranged in a triangular shape, which facilitates the opening and closing of the mold, and the center of the upper mold plate and the locking lower plate is arranged opposite, while the center of the lower mold plate is arranged offset from the center of the upper mold plate and the locking lower plate. The center of the lower mold plate is arranged as the center of the turntable, and the center locking machine column is coaxial with the turntable. When the turntable rotates to switch the position, the weighing sensor mounting hole is just coaxial with the screw barrel injection center hole, the center locking screw rod mounting hole and the weighing sensor mounting hole, so that the injection molding can be realized on the turntable position. The high integration saves space and greatly improves the stability of the equipment operation and the transmission efficiency.

[0009] As a preferred, the center locking screw rod transmission mechanism is vertically arranged between the locking lower mold plate and the lower mold plate and parallel to the center locking machine column, the center locking screw rod transmission mechanism includes a center locking screw rod nut and a center locking screw rod, the upper end of the center locking screw rod is arranged in the weighing sensor mounting hole and connected with the weighing sensor assembly, and the lower end of the center locking screw rod is connected with the center locking synchronous belt type servo motor driving mechanism through the center locking screw rod mounting hole. The locking transmission adopts a screw rod transmission mechanism, which has a faster response speed, higher precision, smaller space and lower noise than the locking oil cylinder in the prior art. The screw rod transmission has no risk of hydraulic oil leakage and pollution, a simpler structure and lower maintenance cost, and only needs regular lubrication and maintenance. The efficiency of the screw rod transmission is much higher than that of the oil pressure transmission.

[0010] As a preferred, the center locking synchronous belt type servo motor driving mechanism includes a center locking servo motor and a center locking synchronous belt assembly.

[0011] As a preferred, the center locking synchronous belt assembly includes a center locking driving pulley arranged on the output shaft of the center locking servo motor, a center locking driven pulley arranged at the lower end of the center locking screw rod transmission mechanism, and a center locking transmission belt arranged around the center locking driving pulley and the center locking driven pulley. The center locking servo motor drives the synchronous belt transmission, the synchronous belt itself can adapt to a certain axle deviation, has elasticity, can play a buffering role, and can replace different pulleys and synchronous belts to meet different speed and torque requirements. The pulley structure installation and maintenance and replacement are simpler, and the cost is lower.

[0012] As preferred, the rotating disc is provided with a plurality of mold positioning holes; the mold positioning hole is coaxial with the mold closing position of the mold closing screw rod transmission mechanism. The rotating disc is provided with a plurality of mold positioning holes, which can realize the installation and positioning of the mold, the switching of the mold, the production in a pipeline mode, and the effective improvement of the production efficiency. The mold positioning hole is coaxial with the mold closing position of the mold closing screw rod transmission mechanism, which can ensure the accurate operation of the injection mold closing and has good stability.

[0013] As preferred, the rotating disc synchronous belt type servo motor driving mechanism comprises a rotating disc servo motor, a speed reducer and a rotating disc synchronous belt transmission mechanism.

[0014] As preferred, the rotating disc synchronous belt transmission mechanism comprises a rotating disc driving pulley provided on the output shaft of the speed reducer, a rotating disc driven pulley and a rotating disc synchronous belt provided around the rotating disc driving pulley and the rotating disc driven pulley; a rotating disc spindle is provided on the center mold locking machine column, the rotating disc driven pulley is provided on the rotating disc spindle, and the rotating disc servo motor is vertically provided on the lower plate surface of the lower mold plate through a rotating disc motor support. The rotating disc synchronous belt type servo motor driving mechanism drives the synchronous belt transmission mechanism through the rotating disc servo motor, utilizes the axial distance deviation of the synchronous belt, can play a role of elastic buffering, can replace different pulleys and synchronous belts to meet different speed and torque requirements, and has simpler pulley structure installation and maintenance and repair replacement and lower cost.

[0015] As preferred, it further comprises a cylinder-free driven injection unit, the injection unit comprises a motor seat assembly, an injection screw rod transmission device and a seat advancing screw rod transmission mechanism driven by a synchronous belt type servo motor driving mechanism respectively. In order to realize the cylinder-free driven setting of the whole machine, the injection unit also adopts cylinder-free driving, which can effectively avoid the oil leakage pollution risk existing in the hydraulic cylinder driving. The motor seat assembly, the injection screw rod transmission device and the seat advancing screw rod transmission mechanism in the injection unit are driven by the synchronous belt type servo motor driving mechanism, realize the cylinder-free driven setting, realize the accurate and stable driving setting, can replace different pulleys and synchronous belts to meet different speed and torque requirements, and have simpler pulley structure installation and maintenance and repair replacement and lower cost.

[0016] As preferred, the injection screw rod transmission device comprises an injection synchronous belt servo motor driving mechanism and an injection screw rod transmission mechanism.

[0017] As preferred, the injection synchronous belt servo motor driving mechanism comprises an injection servo motor and an injection synchronous belt transmission assembly; the injection synchronous belt transmission assembly comprises an injection driving pulley, an injection driven pulley and an injection synchronous belt; the injection driving pulley is provided on the output shaft of the injection servo motor, and the injection driven pulley is provided on the injection screw rod transmission mechanism.

[0018] As preferred, the ejection screw drive mechanism comprises an ejection ball screw and an ejection ball screw nut.

[0019] The ejection screw drive mechanism is driven by the ejection synchronous belt servo motor drive mechanism to realize the injection function, the transmission of the screw drive mechanism is more stable, the service life is longer, the screw drive has no risk of hydraulic oil leakage and pollution, the structure is simpler, the maintenance cost is lower, only regular lubrication is needed, the transmission efficiency is high, the response speed is fast, the transmission precision is high, the occupied space is smaller, and the noise is low.

[0020] As preferred, the motor seat assembly comprises a storage motor, a storage motor reducer, a transmission shaft assembly and a storage synchronous belt assembly; the storage synchronous belt assembly comprises a storage driving pulley arranged on the output shaft of the storage motor reducer, a storage driven pulley arranged on the transmission shaft assembly and a storage synchronous belt wound around the storage driving pulley and the storage driven pulley. The storage motor seat assembly also uses the storage motor to drive the storage synchronous belt to realize storage, the synchronous belt itself can adapt to a certain axial distance deviation, has elasticity, can play a buffering role, and different pulleys and synchronous belts can be replaced to meet different speed and torque requirements, the pulley structure installation and maintenance and replacement are simpler, and the cost is lower.

[0021] As preferred, the seat-in screw drive mechanism comprises a seat-in motor, a seat-in reducer and a seat-in screw assembly arranged on the output shaft of the seat-in reducer, and the seat-in screw assembly comprises a seat-in screw and a seat-in screw nut. The seat-in screw drive mechanism uses the seat-in motor and the seat-in screw assembly, the synchronous belt is flexible transmission, can adapt to a certain axial distance deviation, has elasticity, can play a buffering role, and different pulleys and synchronous belts can be replaced to meet different speed and torque requirements, the pulley structure installation and maintenance and replacement are simpler, and the cost is lower. The transmission of the screw drive mechanism is more stable, the service life is longer, the screw drive has no risk of hydraulic oil leakage and pollution, the structure is simpler, the maintenance cost is lower, only regular lubrication is needed, the efficiency of the screw drive is high, the response speed is fast, the precision of the screw drive is higher, the occupied space is smaller, and the noise is low.

[0022] The technical scheme adopted by the vertical injection molding machine to realize the second invention purpose is: a vertical injection molding machine adopts the rotary table synchronous belt servo motor drive mechanism, the mold locking unit, the ejection unit and the rotary table assembly all adopt the synchronous belt servo motor drive mechanism, and the whole machine is provided with a cylinder-free transmission.

[0023] The vertical injection molding machine, the mold locking unit, the injection unit and the rotating disc assembly are driven by synchronous belt type servo motor driving mechanisms, and are driven by screw rod transmission mechanisms, so that the whole machine is provided with a cylinder-free transmission, the risk of oil leakage is avoided, high-precision positioning, accurate transmission without sliding, long service life of the flexible transmission, adaptation to different application requirements, great improvement of the performance of the injection molding machine, accurate position control, speed control and torque control, high production efficiency and good stability.

[0024] The rotating disc synchronous belt type servo motor driving mechanism has the following advantages: all driving is performed by synchronous belt type servo motor driving mechanisms, the transmission mechanism is driven by a screw rod transmission mechanism, the whole machine does not use a hydraulic oil cylinder, there is no risk of hydraulic oil leakage, the maintenance cost is low, the noise is lower, the synchronous belt is a flexible transmission, the synchronous belt transmission can adapt to a certain axle distance deviation, has a certain elasticity, can play a buffering role, different pulleys and synchronous belts can be replaced to meet different speed and torque requirements, the pulley structure is easier to install, maintain, repair and replace, and the cost is lower, the screw rod transmission has good stability, the transmission is more stable, the service life is longer, the structure is compact and simple, the maintenance cost is lower, only regular lubrication and maintenance are needed, the screw rod transmission has high efficiency and fast response speed, has high precision, occupies less space, and has low noise, and the structure integration of the vertical injection molding machine is realized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the rotating disc synchronous belt type servo motor driving mechanism.

[0026] Figure 2 is a structural schematic view of the rotating disc synchronous belt type servo motor driving mechanism from another angle.

[0027] Figure 3 is a side view of the rotating disc synchronous belt type servo motor driving mechanism.

[0028] Figure 4 is a side view of the rotating disc synchronous belt type servo motor driving mechanism.

[0029] Figure 5 is a side view of the rotating disc synchronous belt type servo motor driving mechanism.

[0030] Figure 6 is a partial structural schematic view of the rotating disc synchronous belt type servo motor driving mechanism.

[0031] Figure 7 is an application schematic view of the rotating disc synchronous belt type servo motor driving mechanism.

[0032] Figure 8Figure 1 is a structural schematic diagram of a turntable synchronous belt servo motor driving mechanism in Example 2.

[0033] Figure 9 Figure 2 is another angle structural schematic diagram of a turntable synchronous belt servo motor driving mechanism in Example 2.

[0034] Figure 10 Figure 3 is an axial view of a turntable synchronous belt servo motor driving mechanism in Example 2.

[0035] Figure 11 Figure 4 is an application schematic diagram of a turntable synchronous belt servo motor driving mechanism in Example 2.

[0036] Figure 12 Figure 5 is a structural schematic diagram of an injection assembly in the present application.

[0037] Figure 13 Figure 6 is another angle structural schematic diagram of an injection assembly in the present application.

[0038] Figure 14 Figure 7 is a partial structural schematic diagram of an injection unit in the present application.

[0039] Figure 15 Figure 8 is another angle structural schematic diagram of a partial structure of an injection unit in the present application.

[0040] Figure 16 Figure 9 is a structural schematic diagram of a vertical injection molding machine in the present application.

[0041] In the figure: 1, mold locking unit; 3, turntable assembly, 31, turntable, 32, turntable spindle, 33, mold positioning hole, 34, dummy mold; 35, turntable proximity switch assembly, 351, turntable proximity switch support, 352, slide plate slide mold slide rod, 353, turntable proximity switch fixed seat, 354, turntable proximity switch support frame, 355, turntable proximity switch, 356, turntable sensing block; 4, workbench assembly, 41, workbench, 42, workbench cover plate; 5, mold plate assembly; 51, lower mold plate, 511, lower mold plate center hole, 512, through slot, 513, weighing sensor mounting hole, 514, waist-shaped long slot, 515, U-shaped slot, 516, circular slot; 52, upper mold plate, 521, screw barrel injection center hole, 522, upper mold plate column hole; 53, mold locking lower mold plate, 531, mold closing lead screw mounting hole, 532, mold locking lower mold plate side edge column hole, 533, mold locking lower mold plate center mold locking column hole; 54, mold locking column, 541, center mold locking column, 542, side edge mold locking column; 55. Lower mold plate flange 6. Drag chain assembly, 7. Control panel, 8. Weighing sensor assembly 9. Rotary table synchronous belt servo motor driving mechanism, 91. Rotary table servo motor, 92. Rotary table speed reducer, 93. Rotary table driving pulley, 94. Rotary table driven pulley, 95. Rotary table synchronous belt, 96. Rotary table motor support 10. Clamping screw rod driving mechanism, 101. Clamping screw rod fixing sleeve, 102. Clamping screw rod nut, 103. Clamping screw rod, 104. Screw rod lower mold plate flange sleeve 11. Clamping synchronous belt servo motor driving mechanism, 111. Clamping servo motor, 112. Clamping driving pulley, 113. Clamping driven pulley, 114. Clamping synchronous belt, 115. Clamping servo motor support 12. Electric control box assembly, 13. Machine frame sealing plate assembly 2. Injection unit 20. Injection unit support, 21. Injection assembly, 22. Screw barrel assembly, 23. Injection driving device 24. Upper upper mold plate, 241. Linear slide rail, 242. Slide block, 243. Screw mounting hole 25. Motor seat assembly, 251. Motor seat, 252. Storage motor, 253. Storage motor speed reducer, 254. Transmission shaft assembly, 2541. Transmission shaft 255. Storage synchronous belt assembly, 2551. Storage driving pulley, 2552. Storage driven pulley, 2553. Storage synchronous belt 256. Injection weighing sensor assembly 26. Injection screw rod driving device 27. Injection screw rod driving mechanism, 271. Injection ball screw, 272. Injection ball screw nut, 273. Transmission bearing 28. Injection synchronous belt servo motor driving mechanism, 281. Injection servo motor, 282. Injection driving pulley, 283. Injection driven pulley, 284. Injection synchronous belt 29. Seat-in screw rod driving mechanism, 291. Seat-in motor, 292. Seat-in speed reducer, 293. Seat-in screw rod assembly, 2931. Seat-in screw rod, 2932. Seat-in screw rod nut, 2933. Seat-in adjusting plate, 2934. Seat-in adjusting spring DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be further described in detail below through specific embodiments and in combination with the accompanying drawings.

[0043] Example 1: Referring to Figures 1 to 7 In this embodiment, a rotary table synchronous belt type servo motor driving mechanism includes an integrated mold locking unit 1 and a rotary table assembly 3. The mold locking unit includes a mold plate assembly 5 and a mold locking mechanism. The mold plate assembly 5 includes a center mold locking mechanism column 541 coaxial with the center of the rotary table. The rotary table assembly 3 includes a rotary table 31 and an adjustable rotary table synchronous belt type servo motor driving mechanism 9 that drives the rotary table to rotate around the center mold locking mechanism column 541. The mold locking mechanism includes an adjustable mold clamping synchronous belt type servo motor driving mechanism 11 and a mold clamping lead screw transmission mechanism 10.

[0044] The mold plate assembly includes an upper mold plate 52, a lower mold plate 51, and a mold locking lower mold plate 53 connected by a set of mold locking mechanism columns. The center of the upper mold plate 52 is provided with a screw barrel injection center hole 521. The center of the mold locking lower mold plate is provided with a mold clamping lead screw mounting hole 531. The lower mold plate 51 is provided with a weighing sensor mounting hole 513 offset from the center. The screw barrel injection center hole 521, the mold clamping lead screw mounting hole 531, and the weighing sensor mounting hole are coaxial.

[0045] The mold clamping lead screw transmission mechanism 10 is vertically arranged between the mold locking lower mold plate and the lower mold plate and is parallel to the center mold locking mechanism column 541. The mold clamping lead screw mechanism includes a mold clamping lead screw nut 102 and a mold clamping lead screw 103. The upper end of the mold clamping lead screw 103 is arranged in the weighing sensor mounting hole and is connected to a weighing sensor assembly 8. The lower end of the mold clamping lead screw 103 passes through the mold clamping lead screw mounting hole 531 and is connected to the mold clamping synchronous belt type servo motor driving mechanism 11.

[0046] The mold clamping synchronous belt type servo motor driving mechanism 11 includes a mold locking servo motor 111 and a mold clamping synchronous belt assembly. The mold clamping synchronous belt assembly includes a mold locking driving pulley 112 arranged on the output shaft of the mold locking servo motor, a mold locking driven pulley 113 arranged at the lower end of the mold clamping lead screw transmission mechanism 10, and a mold clamping synchronous belt 114 arranged around the mold locking driving pulley 112 and the mold locking driven pulley 113.

[0047] The rotary table 31 is provided with a plurality of mold positioning holes 33. The mold positioning holes are coaxial with the mold clamping lead screw transmission mechanism 10.

[0048] The rotating disc synchronous belt type servo motor driving mechanism 9 comprises a rotating disc servo motor 91, a speed reducer 92 and a rotating disc synchronous belt transmission mechanism, the rotating disc synchronous belt transmission mechanism comprises a rotating disc driving pulley 93 arranged on the output shaft of the speed reducer, a rotating disc driven pulley 94 and a rotating disc synchronous belt 95 arranged around the rotating disc driving pulley 93 and the rotating disc driven pulley 94; a rotating disc shaft 32 is arranged on the center locking mold machine column 541, the rotating disc driven pulley 94 is arranged on the rotating disc shaft 32; the rotating disc servo motor 91 is arranged vertically on the lower plate surface of the lower mold plate 51 through a rotating disc motor support 96. The rotating disc motor support 96 is provided with a waist-shaped adjusting hole for adjusting the position.

[0049] Embodiment 2 Referring to Figures 8 to 15 In this embodiment, a rotating disc synchronous belt type servo motor driving mechanism, the technical scheme of which is basically the same as that of embodiment 1, the difference lies in that it further comprises a cylinder-free driving injection unit 2, the injection unit 2 comprises a motor seat assembly 25, an injection screw rod transmission device 26 and a seat-in screw rod transmission mechanism 29 which are driven by synchronous belt type servo motor driving mechanisms respectively.

[0050] The injection screw rod transmission device 26 comprises an injection synchronous belt servo motor driving mechanism 28 and an injection screw rod transmission mechanism 27; the injection synchronous belt servo motor driving mechanism 28 comprises an injection servo motor 281 and an injection synchronous belt transmission assembly; the injection synchronous belt transmission assembly comprises an injection driving pulley 282, an injection driven pulley 283 and an injection synchronous belt 284; the injection driving pulley 282 is arranged on the output shaft of the injection servo motor, the injection driven pulley 283 is arranged on the injection screw rod transmission mechanism; the injection screw rod transmission mechanism 27 comprises an injection ball screw rod 271 and an injection ball screw rod nut 272.

[0051] The motor seat assembly 25 comprises a storage motor 252, a storage motor speed reducer 253, a transmission shaft assembly 254 and a storage synchronous belt assembly 255; the storage synchronous belt assembly 255 comprises a storage driving pulley 2551 arranged on the output shaft of the storage motor speed reducer, a storage driven pulley 2552 arranged on the transmission shaft assembly 254 and a storage synchronous belt 2553 arranged around the storage driving pulley 2551 and the storage driven pulley 2552; the seat-in screw rod transmission mechanism 29 comprises a seat-in motor 291, a seat-in speed reducer 292 and a seat-in screw rod assembly 293 arranged on the output shaft of the seat-in speed reducer, the seat-in screw rod assembly 293 comprises a seat-in screw rod 2931 and a seat-in screw rod nut 2932.

[0052] Embodiment 3 Referring to Figures 1 to 7The embodiment is a vertical injection molding machine, in particular a rotary table type injection molding machine, which comprises a rotary table synchronous belt type servo motor driving mechanism, the rotary table synchronous belt type servo motor driving mechanism comprising a mold clamping unit 1, an injection unit 2 and a rotary table assembly 3, the mold clamping unit 1, the injection unit 2 and the rotary table assembly 3 all being driven by the synchronous belt type servo motor driving mechanism, so that the injection molding machine is provided without hydraulic cylinder transmission.

[0053] The mold clamping unit 1 is driven by the synchronous belt type servo motor and cooperates with the screw transmission to realize the mold opening and closing operation, the injection unit 2 is driven by the synchronous belt type servo motor and cooperates with the screw transmission to realize the material storage and injection operation. The mold clamping unit 1 and the injection unit 2 are synchronously controlled and coordinated to move.

[0054] The mold clamping unit 1 is provided with a multi-station rotary table assembly 3. The multi-station rotary table assembly 3 comprises a rotary table 31 and a rotary table shaft 32.

[0055] The mold clamping unit 1 comprises a workbench assembly 4 and a mold plate assembly 5. The workbench assembly 4 comprises a workbench 41 and a workbench cover plate 42.

[0056] As shown in Figure 5 , Figure 6 The mold plate assembly 5 comprises a lower mold plate 51, an upper mold plate 52 and a mold clamping lower mold plate 53. The mold clamping lower mold plate 53 is provided with a group of mold clamping columns 54, in the embodiment, three mold clamping columns 54 are provided. The lower mold plate 51 is connected to the middle part of the mold clamping columns 54 through a lower mold plate flange 55, and the upper mold plate 52 is arranged at the upper end of the mold clamping columns 54. The three mold clamping columns are arranged in a triangular shape, and the mold clamping columns 54 comprise a central mold clamping column 541 and two side mold clamping columns 542. Since one of the mold clamping columns is arranged at the center of the lower mold plate and is used as the central shaft of the rotary table, it is called the central mold clamping column 541.

[0057] The lower mold plate 51 is arranged in a square structure as a whole, a lower mold plate center hole 511 is arranged at the center position of the lower mold plate, two through grooves 512 are arranged at both sides of the lower mold plate center hole 511, a weighing sensor mounting hole 513 is arranged at the rear side of the lower mold plate, and a waist-shaped long groove 514 is arranged on the left end face of the lower mold plate. The central position of the upper mold plate 52 is provided with a screw barrel injection center hole 521 and three upper mold plate column holes 522. The central mold clamping column 541 is arranged in the lower mold plate center hole 511 of the lower mold plate. The two side mold clamping columns 542 are arranged at the side of the lower mold plate in a biasing manner.

[0058] The upper plate surface of the lower mold plate 51 is integrally provided with a drag chain assembly 6, a rotary table assembly 3 and a weighing sensor assembly 8.

[0059] The chain assembly 6 includes a chain support assembly and a chain, the chain support assembly includes a chain support and a chain support cover plate, the chain is integrated into the chain support, and the chain is used to concentrate the line inside the chain to avoid external friction and object scratches and effectively prolong the service life of the line. At the same time, the setting of the chain can prevent the line from entangling, knotting, and protecting the line from environmental effects. In the embodiment, the chain support is provided in an S-shaped structure, and half of the S-shaped chain support is provided in a semicircular structure and is provided in a ring outside the central axis of the lower die plate.

[0060] The weighing sensor mounting hole 513 includes a U-shaped slot 515 and a circular slot 516, the U-shaped slot penetrates the side edge of the lower die plate 51, and the circular slot communicates with the U-shaped slot and is located at the center position of the triangle formed by the three mold clamping machine columns 51. The weighing sensor mounting hole 513 is internally provided with a weighing sensor assembly 8.

[0061] The center position of the mold clamping lower die plate 53 is provided with a mold clamping screw mounting hole 531, two mold clamping lower die plate side edge machine column holes 532 are arranged in a triangular structure on the mold clamping lower die plate 53, and one mold clamping lower die plate center mold clamping machine column hole 533 is arranged.

[0062] The center of the circular slot 516 is coaxially arranged with the screw barrel injection center hole 521 on the upper die plate 52 and the mold clamping screw mounting hole 531 at the center of the mold clamping lower die plate.

[0063] As shown in Figure 7 , Figure 5 The turntable assembly 3 is arranged on the lower die plate and is coaxially arranged with the center mold clamping machine column 541. The turntable assembly 3 includes a turntable 31, a turntable shaft 32, a group of dummy molds 34 arranged on the turntable 31, and a turntable proximity switch assembly 35. The turntable shaft 32 is sleeved on the center mold clamping machine column 541, and the turntable 31 is rotationally connected to the center mold clamping machine column 341 through the turntable shaft 32. The turntable 31 is supported and arranged on the lower die plate 51 by a group of wear-resistant pad assemblies 34, and the wear-resistant pad assembly 34 includes a wear-resistant pad and a wear-resistant sheet arranged on the wear-resistant pad. The wear-resistant pad assembly 34 is provided with four groups, and the four groups of wear-resistant pad assemblies 34 are arranged in a pair structure outside the lower die plate center hole 511, and one group of wear-resistant pad assemblies is arranged on the weighing sensor assembly 8.

[0064] A pair of upper and lower through grooves 512 are symmetrically arranged on the lower die plate 51 outside the turntable 3, and the through grooves 512 are used to mount the turntable proximity switch assembly 35. The turntable proximity switch assembly 35 is arranged on the lower plate surface of the lower die plate 51 below the through groove 512 and extends upward to the upper plate surface.

[0065] The rotary disc proximity switch assembly 35 comprises a rotary disc proximity switch support 351 fixed on the lower plate surface of the lower die plate, a sliding plate sliding mode sliding rod 352 arranged on the rotary disc proximity switch support 351, a rotary disc proximity switch fixing seat 353 arranged on the sliding plate sliding mode sliding rod 352, and a rotary disc proximity switch support frame 354 arranged on the rotary disc proximity switch fixing seat 353, and a rotary disc proximity switch 355, wherein the rotary disc proximity switch support frame 354 extends from the lower part of the through slot to the upper part, the rotary disc proximity switch 355 is arranged at the upper end of the rotary disc proximity switch support frame 354 and extends to the outside of the through slot, and a rotary disc induction block 356 is arranged on the top of the rotary disc proximity switch 355.

[0066] The rotary disc synchronous belt type servo motor driving mechanism 9 is integrally arranged on the lower plate surface of the lower die plate 51.

[0067] As shown in Figure 2 , Figure 3 The rotary disc synchronous belt type servo motor driving mechanism 9 comprises a rotary disc servo motor 91, a speed reducer 92 connected with the rotary disc servo motor 91, and a rotary disc synchronous belt transmission mechanism, wherein the rotary disc synchronous belt transmission mechanism comprises a rotary disc driving pulley 93 arranged on the output shaft of the speed reducer, a rotary disc driven pulley 94 arranged on the rotary disc mandrel 32, and a rotary disc synchronous belt 95 arranged around the rotary disc driving pulley 93 and the rotary disc driven pulley 94, the rotary disc servo motor 91 is vertically arranged on the lower plate surface of the lower die plate 51 through a rotary disc motor support 96, and the output shaft of the speed reducer 92 is arranged towards the lower die plate, and the rotary disc motor support 96 is arranged on the lower plate surface of one corner of the lower die plate. The rotary disc motor support 96 is connected with the lower die plate through a waist-shaped hole adjustment type connection, so as to realize the adjustment type arrangement of the rotary disc synchronous belt type servo motor driving mechanism. The rotary disc synchronous belt type servo motor driving mechanism 9 is arranged away from the center locking machine column 541 and parallel to the center locking machine column 541. The rotary disc servo motor 91 is a servo motor.

[0068] The rotary disc servo motor 91 transmits power to the rotary disc mandrel 32 through the rotary disc synchronous belt transmission mechanism, and drives the rotary disc 31 to rotate around the center locking machine column 541 through the rotary disc mandrel 32. The rotary disc synchronous belt transmission mechanism has more advantages than the gear transmission. The synchronous belt transmission itself can adapt to a certain axis deviation, has a certain elasticity, can play a buffering role, and can meet different speed and torque requirements by replacing different pulleys and synchronous belts, and the pulley structure is simpler to install, maintain and replace, and has lower cost.

[0069] The clamping screw rod transmission mechanism 10 is arranged inside the clamping screw rod mounting hole 531 and is vertically arranged in a direction parallel to the center locking machine column 541.

[0070] As shown in Figure 2 , Figure 4 , the clamping screw rod transmission mechanism 10 comprises a clamping screw rod fixing sleeve 101, a clamping screw rod nut 102 and a clamping screw rod 103.

[0071] The clamping screw rod fixing sleeve 101 is fixed inside the clamping screw rod mounting hole 531, the clamping screw rod nut 102 is connected with the clamping screw rod fixing sleeve 101, the clamping screw rod 103 is threadedly connected with the clamping screw rod nut 102, and the upper end of the clamping screw rod 102 is rotatably connected in the weighing sensor mounting hole on the lower die plate 51 through a screw rod lower die plate flange sleeve 104 and is connected with a weighing sensor assembly.

[0072] The lower end of the clamping screw rod 102 is connected with the clamping synchronous belt type servo motor driving mechanism 11.

[0073] As shown in Figure 3 , Figure 4 , Figure 5 , the clamping synchronous belt type servo motor driving mechanism 11 comprises a clamping servo motor 111, a clamping driving pulley 112 arranged on the output shaft of the clamping servo motor, a clamping driven pulley 113 arranged at the lower end of the clamping screw rod 102, and a clamping synchronous belt 114 wound around the clamping driving pulley 112 and the clamping driven pulley 113. The clamping servo motor 11 is fixed on the clamping lower die plate 53 through a clamping servo motor support 115, and the output shaft of the clamping servo motor 111 is arranged vertically downward. The clamping servo motor 111 adopts a servo motor. The clamping servo motor support 115 is adjustably connected with the clamping lower die plate through a waist-shaped hole, so that the clamping synchronous belt type servo motor driving mechanism 11 can be adjustably arranged.

[0074] The clamping synchronous belt 114 is driven to rotate by the clamping servo motor 11, thereby driving the clamping screw rod transmission mechanism 10 to move, so as to realize the clamping and unclamping movements. The screw rod transmission is adopted for clamping and unclamping, which is more stable and has a longer service life. At the same time, the screw rod transmission avoids the risk of hydraulic oil leakage and pollution, has a simpler structure, lower maintenance cost and only needs regular lubrication and maintenance. The efficiency of the screw rod transmission is much higher than that of the oil pressure transmission, the response speed is fast, the precision is higher, the occupied space is smaller, and the noise is much lower than that of the oil pressure transmission. The pulley can be adjusted within a certain range by using the waist hole fixing plate. The transmission efficiency is high, so the energy consumption is lower.

[0075] Referring to Figures 8 to 15 , the injection unit 2 is arranged on the upper die plate 52. The injection unit 2 is externally provided with an injection shroud assembly.

[0076] The center of the upper die plate 52 is provided with a screw barrel injection center hole 521 and three upper die plate machine column holes 522.

[0077] An injection unit support 20 is arranged on the upper die plate 52, and the injection unit 2 comprises an injection assembly 21 arranged on the injection unit support 20, a screw barrel assembly 22, and an injection driving device 23.

[0078] The injection assembly 21 comprises an upper upper die plate 24, a motor seat assembly 25 arranged on the upper upper die plate 24, and an injection lead screw transmission device 26.

[0079] The upper upper die plate 24 is in a frame structure as a whole. A linear sliding rail 241 is arranged on the upper upper die plate 24, and a sliding block 242 is slidingly arranged on the linear sliding rail 241. A screw rod mounting hole 243 is arranged at the center of the upper upper die plate 24, and the screw barrel assembly 22 is mounted in the screw rod mounting hole 243 and extends downward of the upper upper die plate 24.

[0080] As shown in Figure 12 , Figure 13 The motor seat assembly 25 comprises a motor seat 251 slidingly arranged on the upper upper die plate 24, a storage motor 252 arranged on the motor seat 251, a storage motor speed reducer 253, a transmission shaft assembly 254, a storage synchronous belt assembly 255, and an injection weighing sensor assembly 256 arranged above the transmission shaft assembly 254 and on the motor seat. The output shaft of the storage motor speed reducer 253 is arranged in parallel with the transmission shaft assembly 254, and the transmission shaft assembly 254 is arranged at the center of the motor seat and faces the center of the upper upper die plate.

[0081] The storage synchronous belt assembly 255 comprises a storage driving belt pulley 2551 arranged on the output shaft of the storage motor speed reducer, a storage driven belt pulley 2552 arranged on the transmission shaft assembly 254, and a storage synchronous belt 2553 wound around the storage driving belt pulley 2551 and the storage driven belt pulley 2552.

[0082] The transmission shaft assembly 254 comprises a transmission shaft 2541, a transmission shaft fixing ring, and a screw rod fixing half ring arranged at the lower end of the transmission shaft. The transmission shaft is rotatably arranged on the motor seat 251 through the transmission shaft fixing ring and a set of transmission bearings.

[0083] The storage motor 252 drives the storage synchronous belt assembly 255 to rotate, and power is transmitted to the transmission shaft assembly 254, and the transmission shaft drives the screw barrel assembly 22 to rotate and store materials.

[0084] As shown in Figure 14 , Figure 15As shown, the injection screw drive device 26 includes an injection screw drive mechanism 27 and an injection synchronous belt servo motor drive mechanism 28, which are mounted on the upper template 24.

[0085] The injection screw drive mechanism 27 includes an injection ball screw 271 and an injection ball screw nut 272.

[0086] The injection synchronous belt servo motor drive mechanism 28 includes an injection servo motor 281 and an injection synchronous belt drive assembly. The injection synchronous belt drive assembly includes an injection drive pulley 282, an injection driven pulley 283, and an injection synchronous belt 284. The injection drive pulley 282 is mounted on the output shaft of the injection servo motor.

[0087] The injection ball screw 271 is rotatably mounted on the upper template 24 via a set of transmission bearings 273. The injection ball screw nut 272 is connected to the motor base 251. The lower end of the injection ball screw 271 is connected to the transmission shaft 2541, and the upper end of the injection ball screw 271 is provided with an injection driven pulley 283. The injection timing belt 283 is wound around the injection driving pulley and the injection driven pulley. The injection servo motor transmits power to the injection ball screw through the injection timing belt transmission assembly, which drives the screw barrel assembly 22 for injection.

[0088] The injection unit 2 further includes a lead screw drive mechanism 29, which replaces the seat cylinder assembly in the prior art.

[0089] The lead screw transmission mechanism 29 includes a lead screw motor 291, a lead screw reducer 292, and a lead screw assembly 293 mounted on the output shaft of the lead screw reducer. The lead screw assembly 293 includes a lead screw 2931 and a lead screw nut 2932. The upper end of the lead screw 2931 is connected to the output shaft of the lead screw reducer via a coupling. The lead screw nut 2932 is elastically adjusted and connected to the upper template via a set of lead screw adjusting plates 2933 and a lead screw adjusting spring 2934.

[0090] like Figure 16 As shown, the vertical injection molding machine also includes conventional components such as a control panel 7, an electrical control box assembly 12, and a frame sealing plate assembly 13.

[0091] The rotary disc synchronous belt type servo motor driving mechanism and the vertical injection molding machine, all transmission adopts synchronous belt transmission, the whole machine does not use hydraulic oil cylinder, there is no risk of hydraulic oil leakage, the maintenance cost is low, the noise is lower, the synchronous belt transmission itself can adapt to certain axle distance deviation, has certain elasticity, can play the buffering effect, and can replace different pulleys and synchronous belts according to the needs to meet different speed and torque requirements, the pulley structure installation and maintenance repair replacement are simpler, and the cost is lower.

[0092] The traditional oil cylinder transmission of the seat cylinder and the injection cylinder in the prior art is innovated to be screw rod transmission, the transmission is more stable, and the service life is longer; the screw rod transmission has no risk of hydraulic oil leakage and pollution, the structure is simpler, the maintenance cost is lower, and only regular lubrication and maintenance are needed; the efficiency of the screw rod transmission is much higher than that of oil pressure transmission, the response speed is fast; the precision of the screw rod transmission is higher, the occupied space is smaller, and the noise is much lower than that of oil pressure transmission, and the waist hole fixing plate makes the pulley adjustable within a certain range.

[0093] The oil motor is replaced by a motor belt transmission, the noise is lower, the transmission efficiency is high, so the energy consumption is lower; the motor has no risk of hydraulic oil leakage, and the maintenance cost is low.

[0094] The above embodiments are only part of the embodiments of the present application, not all the embodiments. Meanwhile, based on the embodiments described in the present application, all other embodiments obtained by those skilled in the art on the basis of the technical solutions of the present application without creative labor should belong to the protection scope of the present application.

Claims

1. A turntable synchronous belt servo motor drive mechanism, comprising an integrated mold-locking unit (1) and a turntable assembly (3), wherein the mold-locking unit comprises a template assembly (5) and a mold-locking mechanism, characterized in that: The template assembly (5) is provided with a central mold-locking machine column (541) coaxial with the center of the turntable. The turntable assembly (3) includes a turntable (31) and an adjustable turntable synchronous belt servo motor drive mechanism (9) that drives the turntable to rotate around the central mold-locking machine column (541). The mold-locking mechanism includes an adjustable mold-closing synchronous belt servo motor drive mechanism (11) and a mold-closing screw transmission mechanism (10).

2. The turntable synchronous belt servo motor drive mechanism according to claim 1, characterized in that: The template assembly (5) includes an upper template (52), a lower template (51), and a lower mold-locking template (53) connected vertically by a set of mold-locking machine columns. The upper template (52) has a screw barrel injection center hole (521) at its center. The lower mold-locking template (53) has a mold-closing screw mounting hole (531) at its center. The lower template (51) has a weighing sensor mounting hole (513) off-center. The screw barrel injection center hole (521), the mold-closing screw mounting hole (531), and the weighing sensor mounting hole (513) are arranged on the same axis.

3. The turntable synchronous belt servo motor drive mechanism according to claim 2, characterized in that: The mold clamping screw transmission mechanism (10) is vertically arranged between the lower mold clamping platen (53) and the lower mold clamping platen (51) and parallel to the central mold clamping machine column (541); the mold clamping screw mechanism (10) includes a mold clamping screw nut (102) and a mold clamping screw (103). The upper end of the mold clamping screw (103) passes through the weighing sensor mounting hole (513) and is connected to a weighing sensor assembly (8). The lower end of the mold clamping screw (103) passes through the mold clamping screw mounting hole (531) and is connected to the mold clamping synchronous belt servo motor drive mechanism (11).

4. The turntable synchronous belt servo motor drive mechanism according to claim 1, characterized in that: The mold-closing synchronous belt servo motor drive mechanism (11) includes a mold-closing servo motor (111) and a mold-closing synchronous belt assembly.

5. The turntable synchronous belt servo motor drive mechanism according to claim 1, characterized in that: The turntable (31) is provided with a plurality of mold positioning holes (33); the mold positioning holes (33) and the mold closing screw transmission mechanism (10) are arranged coaxially at the mold closing position.

6. The turntable synchronous belt servo motor drive mechanism according to claim 1, characterized in that: The turntable synchronous belt servo motor drive mechanism (9) includes a turntable servo motor (91), a reducer (92), and a turntable synchronous belt transmission mechanism.

7. The rotary synchronous belt servo motor drive mechanism according to any one of claims 1 to 6, characterized in that: It also includes a cylinderless injection unit (2), which includes a motor mount assembly (25) driven by a synchronous belt servo motor drive mechanism, an injection screw drive device (26) and a seat screw drive mechanism (29).

8. The turntable synchronous belt servo motor drive mechanism according to claim 7, characterized in that: The injection screw drive device (26) includes an injection synchronous belt servo motor drive mechanism (28) and an injection screw drive mechanism (27); the injection synchronous belt servo motor drive mechanism (28) includes an injection servo motor (281) and an injection synchronous belt drive assembly; the injection screw drive mechanism (27) includes an injection ball screw (271) and an injection ball screw nut (272).

9. The turntable synchronous belt servo motor drive mechanism according to claim 7, characterized in that: The motor mount assembly (25) includes a storage motor (252), a storage motor reducer (253), a transmission shaft assembly (254), and a storage synchronous belt assembly (255); the lead screw transmission mechanism (29) includes a lead screw motor (291), a lead screw reducer (292), and a lead screw assembly (293) mounted on the output shaft of the lead screw reducer. The lead screw assembly (293) includes a lead screw (2931) and a lead screw nut (2932).

10. A vertical injection molding machine, characterized in that: It adopts the turntable synchronous belt servo motor drive mechanism as described in any one of claims 1 to 9. The mold clamping unit (1), injection unit (2) and turntable assembly (3) all adopt the synchronous belt servo motor drive mechanism, realizing the cylinderless transmission of the entire injection molding machine.

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