WO2009111992A1 - 双传动功能电动式注射成型系统及使用该系统的注射成型方法 - Google Patents

双传动功能电动式注射成型系统及使用该系统的注射成型方法 Download PDF

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Publication number
WO2009111992A1
WO2009111992A1 PCT/CN2009/070792 CN2009070792W WO2009111992A1 WO 2009111992 A1 WO2009111992 A1 WO 2009111992A1 CN 2009070792 W CN2009070792 W CN 2009070792W WO 2009111992 A1 WO2009111992 A1 WO 2009111992A1
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WO
WIPO (PCT)
Prior art keywords
injection
screw
plasticizing
electromagnetic clutch
electric
Prior art date
Application number
PCT/CN2009/070792
Other languages
English (en)
French (fr)
Inventor
黄汉雄
吕柏源
吕晓龙
Original Assignee
华南理工大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华南理工大学 filed Critical 华南理工大学
Priority to US12/922,177 priority Critical patent/US8293163B2/en
Priority to JP2010550021A priority patent/JP5539237B2/ja
Priority to EP20090720661 priority patent/EP2266772A4/en
Publication of WO2009111992A1 publication Critical patent/WO2009111992A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
    • B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • B29C45/5008—Drive means therefor
    • B29C2045/5076—Drive means therefor using a single drive motor for rotary and for axial movements of the screw

Definitions

  • the present invention relates to an injection molding machine, and more particularly to a plastic injection molding machine for plastic materials such as plastics and rubber, in particular, the same motor-reduction box transmission device can simultaneously realize plasticizing transmission function and injection transmission. Functional dual transmission function electric injection molding system and its forming method.
  • polymer injection molding machines generally use hydraulic technology, that is, plasticizing, injection molding and clamping.
  • electric injection molding machines ie, electric motors instead of conventional hydraulic transmissions
  • the electric injection molding machine has the advantages of high control precision, quick response, low energy consumption and low noise for injection pressure and speed.
  • the structure of the existing electric injection molding machine is basically that a plastic transmission device is separately used for the plasticizing operation and the injection operation, and the synchronous belt transmission is generally used (see Fig. 1).
  • the electric injection molding machine mainly has the following disadvantages: (1) Both the plasticizing operation and the injection operation require a separate transmission device, which makes the structure bulky and complicated, and increases the manufacturing cost; (2) ⁇ synchronous belt transmission, not only the structure Large, increase manufacturing costs, and will affect accuracy; (3) Frequent start and stop of the motor will cause it to heat up, affecting its service life, making the pressure difficult to stabilize, and the ball screw will start and stop to withstand impact and accelerate wear.
  • the present invention overcomes the need for two sets of transmission devices for the plasticization and injection operation of the existing electric injection molding machine, that is, one set of motor-reduction transmission device realizes the plasticizing function, and another set of motor-reduction transmission device realizes the injection function. Moreover, it is necessary to use the synchronous belt drive, especially the shortcomings of the motor and the ball screw to start and stop frequently, and provide a dual-drive function that can realize the plasticizing transmission function and the injection transmission function by using one set of motor-reduction box transmission device. Electric injection molding system.
  • Another object of the present invention is to provide a double transmission function electric injection molding method realized by the above system.
  • a dual transmission function electric injection molding system comprising an electric double transmission function device, a plasticizing device, an injection mechanism, a shooting table moving pressing device, a guiding frame and a base;
  • the electric double transmission function device is connected with the plasticizing device and the injection mechanism, and the guiding frame is connected with the electric double transmission function device and the injection mechanism, and the electric double transmission function device is
  • the plasticizing device, the injection mechanism, the stage moving pressing device and the guiding frame are mounted on the integral base to form an electric injection molding system with dual transmission functions.
  • the electric double transmission function device comprises a motor, a reduction box, an electromagnetic clutch for plasticizing, an electromagnetic clutch for injection, a spindle, a screw sleeve and a ejector;
  • the input shaft of the reduction box is coupled with the motor;
  • One end of the output shaft is coupled with the fixed end of the plasticizing electromagnetic clutch, and the movable end of the plasticizing electromagnetic clutch is coupled with the screw sleeve through the key;
  • the other end of the output shaft of the reduction gear is coupled with the fixed end of the injection electromagnetic clutch, and the electromagnetic clutch for injection
  • the moving end is coupled to the end face of the nut of the ball screw of the injection mechanism.
  • the plasticizing device comprises a screw, a barrel, a nozzle and a coupling flange; the coupling flange is mounted on a connecting plate end face of the reduction gear box body of the electric double transmission function device, the screw of the plasticizing device
  • the screw bushing installed at the moving end of the plasticizing electromagnetic clutch, the screw tail with the guide key can be moved back and forth on the screw bushing.
  • the screw can be separately rotated to plasticize the material and synchronously retreat, and the injection is performed under the push of the injection mechanism ball screw.
  • Working status is possible working status.
  • the injection mechanism comprises a ball screw and a nut thereof, a sleeve and a bearing seat; the nut of the ball screw is connected to the guiding frame through a sleeve and a bearing seat, and the ball screw extends through the nut
  • the electromagnetic clutch for injection can cause the ball screw to generate a self-locking backward working state and a forward pushing injection working state in an operating state in which the electromagnetic clutch for injection is disengaged.
  • the guiding frame comprises a closed structure by a left frame, a right frame, a front guide column and a rear guide column, and the reduction sleeve of the electric double transmission function device is connected with the injection mechanism by using a coupling sleeve It is integrated and installed on the front and rear guide columns of the guiding frame, so that the electric double-drive function device can move back and forth on the guiding frame freely.
  • the electric double-drive function device The front and rear sides of the bottom of the reduction box are provided with supports for rolling linear guides.
  • the stage moving pressing device is mounted on a left frame of the guiding frame and a bearing plate of the rolling linear guide;
  • the shooting moving pressing device comprises a motor with a reduction box, a ball screw And its nuts and bearings The box and the force measuring box; the tail of the ball screw with the coupling key penetrates into the coupling sleeve of the bearing box; the nut of the ball screw is installed in the force measuring box body, and the spring, the spring and the measuring force are mounted on the left side of the nut
  • the sensor is in contact with a sliding guide on the outer surface of the nut, which can achieve the forward pressing force of the nut during the working process and avoid the rotation of the nut.
  • a dual-drive function electric injection molding method realized by the above system comprising the following steps: (1)
  • the step (1) may specifically be: when the electric double transmission function device is in the starting position ⁇ , the head of the screw of the plasticizing device is at the foremost end of the barrel, and the ball screw of the injection mechanism is retracted to the extreme position of the right end, The ejector pin bears against the tail end of the screw, and the electromagnetic clutch and the electromagnetic clutch for injection are both in a de-energized state; the motor is activated to move the pressing device, and the plasticizing device is moved toward the mold to plasticize the plasticizing device. The nozzle of the device is in close contact with the mold. When the pressing force is gradually increased to the set tonnage, the motor of the stage moving the pressing device stops rotating, and the pressing process ends.
  • the step (2) may specifically be: After the pressing process is finished, the motor of the electric double-drive function device is activated, and the electromagnetic clutch for plasticizing is powered, and the spindle of the electric double-drive function device drives the electromagnetic clutch for plasticizing. The end and the movable end rotate synchronously, and then the rotation of the screw sleeve drives the screw to rotate. Under the rotation of the screw, the material is continuously conveyed forward and plasticized, and the pressure at the front end of the barrel is gradually increased, so that the screw is subjected to the axial force. The synchronous back movement is performed. When the screw is retracted to the predetermined position, the control device sends a signal and the plasticizing process ends.
  • the step (3) may specifically be: After the plasticizing process is finished, the plasticizing electromagnetic clutch is de-energized, the screw stops rotating and retreating, and the electromagnetic clutch for injection is energized, and the nut of the injection mechanism and the electric double-drive function device are driven.
  • the spindle rotates synchronously, the ball screw of the injection mechanism advances axially forward, and the ejector rod acts on the tail end of the screw to advance the screw axially to generate an injection action, and the plasticized quantitative material is injected into the mold cavity.
  • the electromagnetic clutch for injection is de-energized and the injection process is over.
  • the motor of the stage moving the pressing device rotates in the opposite direction, and the nozzle exits the contact with the mold to move the stage
  • the press device is retracted to the predetermined position. At this point, a plasticizing-injection cycle is completed, and the above operation can be carried out as described above.
  • the present invention has the following advantages and effects over the prior art:
  • the dual-drive function electric injection molding system requires two sets of plasticization and injection for the existing electric injection molding machine or hydraulic injection molding machine.
  • the transmission device is simplified into an electric transmission device, which eliminates the one-to-one transmission mode of the plasticizing transmission device and the injection transmission device of the existing electric injection molding machine; the same eliminates the existing electric injection molding.
  • the synchronous belt required for the indirect transmission mode, and the spindle transmission method is directly used; in particular, the working mode of the motor and the ball screw of the existing electric injection molding machine is frequently avoided.
  • the invention has the following significant advantages:
  • the structure is simple, compact, saves materials, and has low manufacturing cost, which is suitable for large-scale application in industrial production.
  • the operation process is reasonable, energy saving and consumption reduction, simple operation, reliable work, and obviously improve the service life of the motor and the ball screw.
  • FIG. 1 is a schematic structural view of a conventional electric injection molding machine.
  • FIG. 2 is a schematic structural view of a dual-drive function electric injection molding system of the present invention.
  • FIG. 3 is a top plan view of the dual transmission function electric injection molding system shown in Fig. 2.
  • Figure 4 is a schematic view showing the structure of the electric double-drive function device of the system shown in Figure 2.
  • Figure 5 is a schematic view showing the structure of the plasticating apparatus of the system shown in Figure 2.
  • Figure 6 is a schematic view showing the structure of the stage moving and pressing device of the system shown in Figure 2.
  • Figure 7 is a schematic view showing the structure of the guide frame of the system shown in Figure 2.
  • the dual-drive function electric injection molding system includes an electric double-drive function device 1, a plasticizing device 2, an injection mechanism 3, a stage moving pressing device 4, a guiding frame 5 and a base 6.
  • the electric double transmission function device 1 comprises a worm gear reduction box 7, on which a motor 8 is mounted, and a hollow main shaft 9 of the electric double transmission function device 1 passes through the reduction box 7, the main shaft 9
  • a plasticizing electromagnetic clutch 10 is mounted on the left end, and the fixed end 13 of the electromagnetic clutch 10 and the left end of the main shaft 9 are integrally coupled by a screw 14, a connecting plate 12 and a key 11, and the movable end 15 of the electromagnetic clutch 10 passes through the key 16 and the screw shaft.
  • the sleeve 17 is coupled, and the tail of the screw 19 with the slide key 18 is inserted into the screw bushing 17; the right end of the spindle 9 is mounted with an electromagnetic clutch 20 for injection, and the electromagnetic clutch 20 is coupled to the connecting plate 22 via the key 21, and the electromagnetic clutch 20 is fixed.
  • the end 23 is integrally coupled with the right end of the main shaft 9 by a screw 24, and the movable end 25 of the electromagnetic clutch 20 is coupled to the nut 40 of the injection mechanism 3 by a screw 27, and the ball screw 28 of the injection mechanism 3 can freely pass through the center through hole of the electromagnetic clutch 20.
  • a top rod 29 that abuts the tail of the screw 19 is attached to the left end of the ball screw 28.
  • the plasticizing apparatus 2 includes a screw 19, a barrel 31, a heater 33, a hopper 34, a nozzle 35, and a coupling flange 36.
  • the coupling flange 36 and the lands 37 shown in Fig. 2 integrally couple the plasticizing device 2 to the casing of the reduction gear box 7 by means of screws 38 and screws 39.
  • the injection mechanism 3 shown in FIG. 4 includes a ball screw 28 and a nut 40.
  • the outer surface of the nut 40 is mounted with a sleeve 41.
  • the sleeve 41 is integrally coupled with the nut 40 by a screw 42.
  • a bearing 43 is mounted thereon, the bearing 43 is mounted in the bearing housing 44, the outer rim of the bearing 43 is positioned by the gland 45, and the inner cymbal is positioned by the nut 46.
  • the stage moving and pressing device 4 includes a motor 48 with a reduction gear box 47, a bearing housing 49, a force measuring box 50, and a ball screw 51.
  • the tail portion of the ball screw 51 with the coupling key 52 is coupled to the input shaft end 54 of the reduction gear box 47 via the coupling sleeve 53, and the bearings 55 and 56 are respectively mounted on the left and right sides of the coupling sleeve 53, and the gland 5 is respectively used. 7 and 58 position the bearings 55 and 56.
  • an adapter sleeve 59 is attached to the right end of the coupling sleeve 53.
  • the nut 60 of the ball screw 51 is mounted in the force measuring body 61.
  • the outer end surface of the nut 60 is provided with a guiding groove 62.
  • a guide sliding key is mounted in the force measuring box 61 at a position matching the nut guiding groove 62.
  • a spring 64 is mounted on the left side of the nut 60
  • a load cell 6 is mounted on the left end of the force measuring box 61.
  • the load cell 66 and the nut 60 are elastically contacted by the spring 64, and the force measuring body 61 is 61. Both end faces are pressed by a gland 67 and a gland 68, respectively.
  • the electric double transmission function device 1 and the injection mechanism 3 are integrated by the coupling sleeve 69 and by the nut 70, and the electric double transmission function device 1 and the injection mechanism 3 are respectively passed through the reduction gear box 7 respectively.
  • the front and rear holes of the socket and the injection mechanism 3 bracket are integrated with the front and rear guide posts 71 of the guide frame 5.
  • the upper end surface 73 of the coupling plate base 72 is connected with the reduction box base plate 74 of the electric double-drive function device, and the lower plate bracket 72 is connected.
  • the end face 75 is connected to the slider 77 of the rolling linear guide 76.
  • the nut 60 Due to the action of the guide sliding button 63, the nut 60 can only produce axial movement, and the coupling plate seat is connected through the reduction gear box 7 and the rolling linear guide 76. 72, driving the plasticizing device 2 to move along the guide rail 78 in the direction of the mold.
  • the spring 64 in the force measuring box 61 is gradually compressed under the action of the nut 60, and transmits the force to The load cell 66, when the pressing force is gradually increased to the set tonnage ⁇ , the load cell 66 sends a signal, the motor 48 of the stage moving pressing device 4 stops rotating, and the pressing process ends; at the end of the pressing process ⁇ , start electric
  • the motor 8 of the transmission function device energizes the plasticizing electromagnetic clutch 10, and the movable end 15 of the electromagnetic clutch 10 is sucked.
  • the rotation of the spindle 9 drives the fixed end 13 and the movable end 15 of the electromagnetic clutch 10 to rotate synchronously, and then passes through The screw sleeve 17 rotates to drive the screw 19 to rotate.
  • the material is continuously conveyed forward and plasticized, and the pressure at the front end of the barrel 3 1 is gradually increased, so that the screw 19 is subjected to the axial force to synchronously retreat.
  • the plasticizing electromagnetic clutch 10 loses power, the screw 19 stops rotating and retreats, and the injection electromagnetic clutch 20 is energized, and the electromagnetic clutch
  • the movable end 25 of the 20 is sucked, and the nut 40 and the main shaft 9 are rotated synchronously, and the ball screw 28 is axially advanced forward, and is applied to the tail end of the screw 19 through the ejector rod 29, so that The screw 19 is axially advanced to generate an injection action, and the plasticized quantitative material is injected into the mold cavity, and the electromagnetic clutch 20 for injection is de-energized, and the injection process ends; after passing the prescribed day, the stage moves the pressing device The motor 48 of 4 rotates in the opposite direction, and the nozzle 35 comes out of contact with the mold, causing the stage moving press device 4 to retreat to a predetermined position. At this point, a plasticizing-injection cycle is completed, and the above operation can be carried out as described above.

Description

双传动功能电动式注射成型系统及使用该系统的
注射成型方法 技术领域
[1] 本发明涉及注射成型机， 特别涉及一种塑料、 橡胶等高分子材料电动式注射成 型机， 具体地说是同一套电机-减速箱传动装置可同吋实现塑化传动功能和注射 传动功能的双传动功能电动式注射成型系统及其成型方法。
背景技术
[2] 长期以来， 高分子材料注射成型机一般釆用液压技术， 即塑化、 注射和合模等 均釆用液压传动。 近年来， 电动式注射成型机 （即釆用电动代替传统的液压传 动） 发展相当迅速。 与液压式注射成型机比， 电动式注射成型机具有对注射压 力和速度等的控制精度较高、 响应较快， 能耗和噪音较低等优点。 但现有电动 式注射成型机的结构基本上是塑化操作和注射操作均分别单独釆用一套电动式 传动装置， 而且一般釆用同步带传动 （见图 1) 。 这种电动式注射成型机主要存 在如下的缺点： （1) 塑化操作和注射操作均需单独的传动装置， 使结构庞大和 复杂， 增加制造成本； （2) 釆用同步带传动， 不但结构庞大， 增加制造成本， 而且会影响精度等； （3) 电机频繁启停会导致其发热， 影响其使用寿命， 使压 力不易稳定， 滚珠丝杆不断启停会使其承受冲击力而加速磨损。
对发明的公开
技术问题
[3] 本发明在于克服现有电动式注射成型机塑化和注射操作需要两套传动装置， 即 一套电机-减速传动装置实现塑化功能、 另一套电机-减速传动装置实现注射功能 ， 而且要釆用同步带传动尤其是电机和滚珠丝杆要频繁启停的缺点， 提供一种 釆用一套电机-减速箱传动装置可同吋实现塑化传动功能和注射传动功能的双传 动功能电动式注射成型系统。
[4] 本发明的另一目的在于提供一种由上述系统实现的双传动功能电动式注射成型 方法。
技术解决方案 [5] 本发明的目的通过下述技术方案实现： 一种双传动功能电动式注射成型系统， 包括一电动双传动功能装置、 一塑化装置、 一注射机构、 一射台移动压合装置 、 一导向机架和一底座； 所述电动双传动功能装置与塑化装置和注射机构连接 ， 所述导向机架与电动双传动功能装置和注射机构连接， 将所述的电动双传动 功能装置、 塑化装置、 注射机构、 射台移动压合装置和导向机架安装在整体的 底座上， 构成一种双传动功能的电动式注射成型系统。
[6] 优选地， 所述电动双传动功能装置包括电机、 减速箱、 塑化用电磁离合器、 注 射用电磁离合器、 主轴、 螺杆轴套和顶杆； 减速箱的输入轴与电机联接； 减速 箱输出轴一端与塑化用电磁离合器的定端联接， 塑化用电磁离合器的动端通过 键与螺杆轴套联接； 减速箱输出轴另一端与注射用电磁离合器的定端联接， 注 射用电磁离合器的动端与注射机构的滚珠丝杆的螺母的端面联接。
[7] 优选地， 所述塑化装置包括螺杆、 机筒、 喷嘴和联接法兰； 将联接法兰安装在 联接电动双传动功能装置的减速箱箱体的连接盘端面， 塑化装置的螺杆穿过安 装在塑化用电磁离合器动端的螺杆轴套中， 带有导键的螺杆尾部可在螺杆轴套 上做前后移动。 在塑化用电磁离合器和注射用电磁离合器的合或离的工作状态 配合下， 可对螺杆分别产生旋转以使物料塑化并同步后退的工作状态和在注射 机构滚珠丝杆的推动下进行注射的工作状态。
[8] 优选地， 所述注射机构包括滚珠丝杆及其螺母、 轴套和轴承座； 将滚珠丝杆的 螺母通过轴套和轴承座与导向机架相连， 滚珠丝杆穿过螺母伸入注射用电磁离 合器， 在注射用电磁离合器离或合的工作状态下， 可使滚珠丝杆分别产生无自 锁的后退工作状态和产生前推的注射工作状态。
[9] 优选地， 所述导向机架由左机架、 右机架、 前导柱和后导柱构成一个封闭的结 构， 釆用联接套筒把电动双传动功能装置的减速箱与注射机构联成一体并安装 在导向机架的前、 后导柱上， 使电动双传动功能装置能自如地在导向机架上做 前后移动， 为了提高装置前后移动的平稳性， 在电动双传动功能装置的减速箱 底部的前后侧设置有滚动直线导轨的支座。
[10] 优选地， 将射台移动压合装置安装在导向机架的左机架和滚动直线导轨的支座 板上； 所述射台移动压合装置包括带减速箱的电机、 滚珠丝杆及其螺母、 轴承 箱和测力箱； 滚珠丝杆上带联接键的尾部穿入轴承箱的联轴套上； 滚珠丝杆的 螺母安装在测力箱体内， 在螺母的左侧安装有弹簧， 弹簧与测力传感器接触， 在螺母外表面设有导向滑键， 它既能实现螺母在工作过程中产生向前压紧作用 ， 又能避免螺母转动。
一种由上述系统实现的双传动功能电动式注射成型方法， 包括下述步骤： （1
) 启动射台移动压合装置的电机， 带动塑化装置向模具方向移动， 使喷嘴贴紧 模具； （2) 启动电动双传动功能装置的电机， 使塑化用电磁离合器得电， 带动 螺杆转动并做同步后退运动， 完成塑化过程； （3) 注射用电磁离合器得电， 注 射机构的滚珠丝杆往前做轴向推进， 使螺杆轴向推进而产生注射动作， 之后注 射用电磁离合器失电， 注射过程结束。
所述步骤 （1) 具体可为： 当电动双传动功能装置处于起始位置吋， 塑化装置 的螺杆的头部处于机筒最前端， 注射机构的滚珠丝杆退至最右端的极限位置， 顶杆顶住螺杆的尾端， 此吋塑化用电磁离合器和注射用电磁离合器均处在失电 状态； 启动射台移动压合装置的电机， 带动塑化装置向模具方向移动， 使塑化 装置的喷嘴贴紧模具， 在压合力逐渐增大至设定的吨位吋， 射台移动压合装置 的电机停止转动， 压合过程结束。
所述步骤 （2) 具体可为： 压合过程结束吋， 启动电动双传动功能装置的电机 ， 使塑化用电磁离合器得电， 电动双传动功能装置的主轴转动带动塑化用电磁 离合器的定端和动端同步转动， 进而通过螺杆轴套产生转动带动螺杆转动， 在 螺杆转动下物料不断往前输送并被塑化， 此吋机筒前端的压力逐渐提高， 使螺 杆受到轴向力作用而做同步后退运动， 当螺杆后退至预定位置吋， 控制装置发 出信号， 塑化过程结束。
所述步骤 （3) 具体可为： 塑化过程结束吋， 塑化用电磁离合器失电， 螺杆停 止转动和后退， 而注射用电磁离合器得电， 带动注射机构的螺母和电动双传动 功能装置的主轴同步转动， 注射机构的滚珠丝杆往前做轴向推进， 通过顶杆作 用到螺杆的尾端， 使螺杆轴向推进而产生注射动作， 把塑化的定量物料注射入 模具型腔， 此吋注射用电磁离合器失电， 注射过程结束。 在经过规定的吋间后 ， 射台移动压合装置的电机做反方向转动， 喷嘴退出与模具接触， 使射台移动 压合装置退至预定位置。 至此， 完成了一个塑化 -注射周期， 并可按以上操作进 入下一工作过程。
有益效果
[15] 本发明相对于现有技术具有如下的优点及效果： 本双传动功能电动式注射成型 系统将现有电动式注射成型机或液压式注射成型机的塑化和注射所需要的两套 传动装置简化成了一套电动式传动装置， 消除了现有电动式注射成型机的塑化 用传动装置和注射用传动装置必须一对一的传动方式； 同吋消除了现有电动式 注射成型机间接传动方式所需的同步带， 而直接釆用主轴传动方式； 尤其是避 免了现有电动式注射成型机的电机和滚珠丝杆要频繁启停的工作方式。 由此本 发明具有以下显著的优点：
[16] (1)
结构简单、 紧凑， 节省材料， 制造成本比较低， 适合在工业生产中大规模地推 广应用。
[17] (2)
作业流程合理， 节能降耗， 操作简单， 工作可靠， 明显提高电机和滚珠丝杆等 的使用寿命。
[18] (3) 生产过程稳定， 提高制品的精度和性能。
附图说明
[19] 图 1是现有电动式注射成型机的结构示意图。
[20] 图 2是本发明双传动功能电动式注射成型系统的结构示意图。
[21] 图 3是图 2所示双传动功能电动式注射成型系统的俯视图。
[22] 图 4是图 2所示系统的电动双传动功能装置的结构示意图。
[23] 图 5是图 2所示系统的塑化装置的结构示意图。
[24] 图 6是图 2所示系统的射台移动压合装置的结构示意图。
[25] 图 7是图 2所示系统的导向机架的结构示意图。
本发明的实施方式
[26] 面结合实施例及附图对本发明作进一步详细的描述， 但本发明的实施方式不限 于此。 [27] 实施例
[28] 图 2和图 3示出了本发明双传动功能电动式注射成型系统的具体结构。 由图可见 ， 本双传动功能电动式注射成型系统包括电动双传动功能装置 1、 塑化装置 2、 注射机构 3、 射台移动压合装置 4、 导向机架 5和底座 6。
[29] 如图 4所示， 电动双传动功能装置 1包括蜗轮蜗杆减速箱 7， 减速箱 7上安装有电 机 8， 电动双传动功能装置 1中空的主轴 9穿过减速箱 7， 主轴 9的左端安装有塑化 用电磁离合器 10， 通过螺钉 14、 连接板 12和键 11使电磁离合器 10的定端 13与主 轴 9的左端联接成一体， 电磁离合器 10的动端 15通过键 16与螺杆轴套 17联接， 带 有滑键 18的螺杆 19的尾部插入螺杆轴套 17内； 主轴 9的右端安装有注射用电磁离 合器 20， 电磁离合器 20通过键 21与连接板 22联接， 电磁离合器 20的定端 23用螺 钉 24与主轴 9右端联接成一体， 电磁离合器 20的动端 25通过螺钉 27与注射机构 3 的螺母 40联接， 注射机构 3的滚珠丝杆 28可以自由通过电磁离合器 20的中心通孔 进入主轴 9的右端， 在滚珠丝杆 28左端部安装有顶住螺杆 19尾部的顶杆 29。
[30] 如图 5所示， 塑化装置 2包括螺杆 19、 机筒 31、 加热器 33、 加料斗 34、 喷嘴 35和 联接法兰 36。 联接法兰 36与如图 2所示的连接盘 37通过螺钉 38和螺钉 39将塑化装 置 2与减速箱 7的箱体联接成一体。
[31] 如图 4所示的注射机构 3包括滚珠丝杆 28及其螺母 40， 螺母 40的外表面安装有轴 套 41， 轴套 41通过螺钉 42与螺母 40联成一体， 在轴套 41上安装有轴承 43， 轴承 4 3安装在轴承座 44中， 轴承 43的外圏由压盖 45定位， 内圏由螺母 46定位。
[32] 如图 6所示， 射台移动压合装置 4包括带减速箱 47的电机 48、 轴承箱 49、 测力箱 50和滚珠丝杆 51。 滚珠丝杆 51上带联接键 52的尾部通过联轴套 53与减速箱 47的 输入轴端 54联接， 在联轴套 53左、 右侧分别安装有轴承 55和 56， 并分别用压盖 5 7和 58将轴承 55和 56定位。 为防止滚珠丝杆 51脱出联轴套 53， 在联轴套 53的右端 安装有紧定套 59。 滚珠丝杆 51的螺母 60安装在测力箱体 61内， 螺母 60的大端外 表面开有导向槽 62， 在测力箱体 61内与螺母导槽 62相配合的位置安装有导向滑 键 63， 在螺母 60的左侧安装有弹簧 64， 在测力箱体 61的左端安装有测力传感器 6 6， 测力传感器 66与螺母 60之间通过弹簧 64产生弹性接触， 测力箱体 61两端面分 别由压盖 67和压盖 68压紧。 [33] 如图 7所示， 通过联接套筒 69并由螺母 70将电动双传动功能装置 1和注射机构 3 联成一体， 电动双传动功能装置 1和注射机构 3又分别通过减速箱 7前后孔座和注 射机构 3支架的前后孔座与导向机架 5的前后导柱 71联成一体。 为了提高电动双 传动功能装置在导向机架上前后移动的平稳性和可靠性， 联接板座 72的上端面 7 3与电动双传动功能装置的减速箱底座板 74相连， 联接板座 72的下端面 75与滚动 直线导轨 76的滑块 77相连。
[34] 下面说明本发明的双传动功能电动式注射成型系统的工作过程。
[35] 当电动双传动功能装置 1处于起始位置吋， 螺杆 19的头部 30处于机筒 31最前端 ， 注射机构 3的滚珠丝杆 28退至最右端的极限位置， 顶杆 29顶住螺杆 19的尾端， 此吋塑化用电磁离合器 10和注射用电磁离合器 20均处在失电状态， 射台移动压 合装置 4的测力箱 50处在滚动直线导轨 76右端的极限位置； 启动射台移动压合装 置 4的电机 48， 驱动滚珠丝杆 51， 由于导向滑键 63的作用， 螺母 60只能产生轴向 移动， 并通过连接减速箱 7和滚动直线导轨 76的联接板座 72， 带动塑化装置 2沿 导轨 78向模具方向移动， 当移动至喷嘴 35贴紧模具吋， 测力箱体 61内的弹簧 64 在螺母 60前移作用下逐渐被压缩， 并将力传递至测力传感器 66， 在压合力逐渐 增大至设定的吨位吋， 测力传感器 66发出一信号， 射台移动压合装置 4的电机 48 停止转动， 压合过程结束； 在压合过程结束吋， 启动电动双传动功能装置的电 机 8， 使塑化用电磁离合器 10得电， 电磁离合器 10的动端 15被吸合， 此吋主轴 9 转动带动电磁离合器 10的定端 13和动端 15同步转动， 进而通过螺杆轴套 17产生 转动带动螺杆 19转动， 在螺杆 19转动下物料不断往前输送并被塑化， 此吋机筒 3 1前端的压力逐渐提高， 使螺杆 19受到轴向力作用而做同步后退运动， 因为此吋 注射用电磁离合器 20尚处在失电状态， 电磁离合器 20的动端 25仍处在释放的自 由状态， 在螺杆 19轴向力的作用下， 滚珠丝杆 28的后退使螺母 40与电磁离合器 2 0的动端 25同步转动， 在滚珠丝杆 28的后退过程中由于其具有预紧力， 因此可满 足塑化吋所需的反压力， 当螺杆后退至预定位置吋， 控制装置发出信号， 塑化 过程结束； 与此同吋， 塑化用电磁离合器 10失电， 螺杆 19停止转动和后退， 而 注射用电磁离合器 20得电， 电磁离合器 20的动端 25被吸合， 带动螺母 40和主轴 9 同步转动， 滚珠丝杆 28往前做轴向推进， 通过顶杆 29作用到螺杆 19的尾端， 使 螺杆 19轴向推进而产生注射动作， 把塑化的定量物料注射入模具型腔， 此吋注 射用电磁离合器 20失电， 注射过程结束； 在经过规定的吋间后， 射台移动压合 装置 4的电机 48做反方向转动， 喷嘴 35退出与模具接触， 使射台移动压合装置 4 退至预定位置。 至此， 完成了一个塑化 -注射周期， 并可按以上操作进入下一工 作过程。
[36] 上述实施例为本发明较佳的实施方式， 但本发明的实施方式并不受上述实施例 的限制， 其他的任何未背离本发明的精神实质与原理下所作的改变、 修饰、 替 代、 组合、 简化， 均应为等效的置换方式， 都包含在本发明的保护范围之内。

Claims

权利要求书
[1] 一种双传动功能电动式注射成型系统， 其特征在于： 包括一电动双传动功 能装置、 一塑化装置、 一注射机构、 一射台移动压合装置、 一导向机架和 一底座； 所述电动双传动功能装置与塑化装置和注射机构连接， 所述导向 机架与电动双传动功能装置和注射机构连接， 所述电动双传动功能装置、 塑化装置、 注射机构、 射台移动压合装置和导向机架安装在整体的底座上
[2] 根据权利要求 1所述的双传动功能电动式注射成型系统， 其特征在于： 所述 电动双传动功能装置包括电机、 减速箱、 塑化用电磁离合器、 注射用电磁 离合器、 主轴、 螺杆轴套和顶杆； 减速箱的输入轴与电机联接； 减速箱输 出轴一端与塑化用电磁离合器的定端联接， 塑化用电磁离合器的动端通过 键与螺杆轴套联接； 减速箱输出轴另一端与注射用电磁离合器的定端联接
， 注射用电磁离合器的动端与注射机构的滚珠丝杆的螺母的端面联接。
[3] 根据权利要求 2所述的双传动功能电动式注射成型系统， 其特征在于： 所述 塑化装置包括螺杆、 机筒、 喷嘴和联接法兰； 将联接法兰安装在联接电动 双传动功能装置的减速箱箱体的连接盘端面， 塑化装置的螺杆穿过安装在 塑化用电磁离合器动端的螺杆轴套中， 带有导键的螺杆尾部可在螺杆轴套 上做前后移动。
[4] 根据权利要求 2所述的双传动功能电动式注射成型系统， 其特征在于： 所述 注射机构包括滚珠丝杆及其螺母、 轴套和轴承座； 将滚珠丝杆的螺母通过 轴套和轴承座与导向机架相连， 滚珠丝杆穿过螺母伸入注射用电磁离合器 ， 在注射用电磁离合器离或合的工作状态下， 使滚珠丝杆分别产生无自锁 的后退工作状态和产生前推的注射工作状态。
[5] 根据权利要求 2所述的双传动功能电动式注射成型系统， 其特征在于： 所述 导向机架由左机架、 右机架、 前导柱和后导柱构成一个封闭的结构， 釆用 联接套筒把电动双传动功能装置的减速箱与注射机构联成一体并安装在导 向机架的前、 后导柱上， 在电动双传动功能装置的减速箱底部的前后侧设 置有滚动直线导轨的支座。
[6] 根据权利要求 5所述的双传动功能电动式注射成型系统， 其特征在于： 所述 射台移动压合装置安装在导向机架的左机架和滚动直线导轨的支座板上； 所述射台移动压合装置包括带减速箱的电机、 滚珠丝杆及其螺母、 轴承箱 和测力箱； 滚珠丝杆上带联接键的尾部穿入轴承箱的联轴套上； 滚珠丝杆 的螺母安装在测力箱体内， 在螺母的左侧安装有弹簧， 弹簧与测力传感器 接触， 在螺母外表面设有导向滑键。
[7] 一种由权利要求 1〜6任一项所述系统实现的双传动功能电动式注射成型方 法， 其特征在于包括下述步骤： （1) 启动射台移动压合装置的电机， 带动 塑化装置向模具方向移动， 使喷嘴贴紧模具； （2) 启动电动双传动功能装 置的电机， 使塑化用电磁离合器得电， 带动螺杆转动并做同步后退运动， 完成塑化过程； （3) 注射用电磁离合器得电， 注射机构的滚珠丝杆往前做 轴向推进， 使螺杆轴向推进而产生注射动作， 之后注射用电磁离合器失电 ， 注射过程结束。
[8] 根据权利要求 7所述的双传动功能电动式注射成型方法， 其特征在于： 所述 步骤 （1) 为： 当电动双传动功能装置处于起始位置吋， 塑化装置的螺杆的 头部处于机筒最前端， 注射机构的滚珠丝杆退至最右端的极限位置， 顶杆 顶住螺杆的尾端， 此吋塑化用电磁离合器和注射用电磁离合器均处在失电 状态； 启动射台移动压合装置的电机， 带动塑化装置向模具方向移动， 使 塑化装置的喷嘴贴紧模具， 在压合力逐渐增大至设定的吨位吋， 射台移动 压合装置的电机停止转动， 压合过程结束。
[9] 根据权利要求 7所述的双传动功能电动式注射成型方法， 其特征在于： 所述 步骤 （2) 为： 压合过程结束吋， 启动电动双传动功能装置的电机， 使塑化 用电磁离合器得电， 电动双传动功能装置的主轴转动带动塑化用电磁离合 器的定端和动端同步转动， 进而通过螺杆轴套产生转动带动螺杆转动， 在 螺杆转动下物料不断往前输送并被塑化， 此吋机筒前端的压力逐渐提高， 使螺杆受到轴向力作用而做同步后退运动， 当螺杆后退至预定位置吋， 控 制装置发出信号， 塑化过程结束。
[10] 根据权利要求 7所述的双传动功能电动式注射成型方法， 其特征在于： 所述 步骤 （3) 为： 塑化过程结束吋， 塑化用电磁离合器失电， 螺杆停止转动和 后退， 而注射用电磁离合器得电， 带动注射机构的螺母和电动双传动功能 装置的主轴同步转动， 注射机构的滚珠丝杆往前做轴向推进， 通过顶杆作 用到螺杆的尾端， 使螺杆轴向推进而产生注射动作， 把塑化的定量物料注 射入模具型腔， 此吋注射用电磁离合器失电， 注射过程结束。 在经过规定 的吋间后， 射台移动压合装置的电机做反方向转动， 喷嘴退出与模具接触 ， 使射台移动压合装置退至预定位置。 至此， 完成了一个塑化 -注射周期， 并可按以上操作进入下一工作过程。
PCT/CN2009/070792 2008-03-13 2009-03-13 双传动功能电动式注射成型系统及使用该系统的注射成型方法 WO2009111992A1 (zh)

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