WO2009155798A1 - 注塑机加料射出装置 - Google Patents
注塑机加料射出装置 Download PDFInfo
- Publication number
- WO2009155798A1 WO2009155798A1 PCT/CN2009/070800 CN2009070800W WO2009155798A1 WO 2009155798 A1 WO2009155798 A1 WO 2009155798A1 CN 2009070800 W CN2009070800 W CN 2009070800W WO 2009155798 A1 WO2009155798 A1 WO 2009155798A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- servo motor
- injection
- screw
- feeding
- motor
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract description 46
- 239000007924 injection Substances 0.000 title claims abstract description 46
- 238000001746 injection moulding Methods 0.000 title claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
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
- 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
- B29C2045/504—Drive means therefor electric motors for rotary and axial movement of the screw being coaxial with the screw
Definitions
- the invention relates to a feeding injection mechanism of an injection molding machine. Background technique
- Figure 1 shows the feeding injection device of the existing injection molding machine.
- the feeding servo motor 3 is rotated right (from the end of the motor), driven by the driving wheel to the driven wheel, and the driving screw is rotated left (from the shaft end of the motor) to realize the feeding and mixing action; simultaneously with the feeding action, the injection servo Motor 1 ⁇ left-handed (from the end of the motor), drive the drive wheel 1 ( ⁇ left-handed, drive wheel 1 ( ⁇ drives the driven wheel a 9, right-handed (viewed from the motor shaft end), driven wheel a 9, direct drive
- the drive screw 5 is right-handed, because the transmission nut 6 is fixed and cannot be moved, so the drive screw 5 is forced to retreat at the same time in the right-hand rotation to achieve the retracting action.
- the driven wheel 9 through the spline ⁇ and the gland 8. It is fixed on the drive screw 5, so when the drive screw 5 is retracted, the driven wheel -9, the driven wheel -9, the fixed transmission structure, and the injection servo motor 1 ⁇ are simultaneously retracted.
- a complete set of pulley drive mechanism is required between the feeding servo motor and the screw.
- a pulley drive mechanism is also required between the servo motor and the drive screw.
- a thrust bearing is also arranged between the moving screws to realize rotational flattening.
- the complexity of the mechanism is obvious, resulting in increased costs; secondly, due to the use of pulley drive, the transmission accuracy is low; moreover, both the motor and the transmission need to follow the screw movement, in fact they all need to be set in a movement
- the inertia of the platform together with the motor and the transmission mechanism is very large, and it is difficult to precisely control the axial position during starting and braking, and the control precision is not high. Summary of the invention
- the invention solves the defects of complicated mechanism, large moving parts, large moving inertia and low control precision of the feeding injection device of the existing injection molding machine, and provides a simple structure, less moving parts, small moving inertia, high control precision and low cost.
- the injection molding machine feeds the injection device.
- the injection molding device of the injection molding machine of the present invention comprises:
- a stirring screw disposed in the barrel for stirring and pushing the material
- the transmission screw is fixed to the stirring screw
- the transmission screw is disposed on the feeding servo motor, the feeding servo motor is an inner rotor servo motor, and the driving screw is connected to the base of the feeding servo motor through a bearing, and the driving screw is sleeved a transmission nut, the transmission nut is connected to an inner rotor of the feeding servo motor;
- the rear end of the transmission bearing has an extension section, the extension section is disposed on the injection servo motor, and the extension section is connected to the base of the injection servo motor through a bearing, the extension section and the The ball is connected between the rotors of the servo motor.
- the injection servo motor is an outer rotor motor, and the extension is connected to the outer rotor of the injection servo motor.
- the injection servo motor is an inner rotor motor, and the extension section is connected Connect the inner rotor of the servo motor.
- extension between the extension and the rotor of the injection servo motor is: the extension is an angle bar, and the rotor of the injection servo motor is connected to the corner bar.
- the invention uses two hollow rotor servo motors to realize the complete action of feeding and injection.
- the injection servo motor rotates to the right (from the motor shaft end), the feeding servo motor does not rotate, acts as a brake, because the two motors are completely fixed, the drive screw is forced to retreat, and the stirring screw is driven back to realize the loosening action, and the retracting speed is only It is related to the speed of the servo motor.
- the servo motor is rotated to the right (from the motor shaft end), the servo motor is left-handed, the drive screw is retracted, the servo motor is driven to drive the angle bar to the left, and the drive screw is rotated to the left.
- the drive screw drives the stirring screw to rotate left and backward to realize the feeding and stirring action.
- the retraction speed of the agitating screw is the sum of the rotational speeds of the two hollow rotor servo motors.
- the servo motor is left-handed (viewed from the motor shaft end), the servo motor is not moved, and acts as a brake.
- the drive screw is forced to move forward, and the stirring screw is moved to move forward to make the injection action.
- the invention adopts two servo motor linkage direct drive system, the structure is simple and compact, and the efficiency of the whole drive system can be up to 90%.
- the working process only the agitating screw and the driving screw are moved, and the motor is completely immobilized, which greatly reduces the mobility inertia and facilitates accurate control of the axial position.
- the two motor steering through the combination of the two motor steering, there is a large adjustment space in the feeding action and the feeding speed, which can greatly shorten the feeding time (within 0.25S), and realize all the feeding actions such as rapid injection and fast feeding.
- the entire feeding time is adjusted to several tens of times or even hundreds of times of the shortest cycle time, and the maximum limit is satisfied for all levels of customer demand.
- the invention has the advantages of simple and compact structure, low cost, less moving parts, small moving inertia, high control precision, and large adjustment range of feeding action and feeding speed.
- Figure 1 is a feeding injection device of a conventional injection molding machine
- Figure 2 is a schematic diagram of the structure of the present invention
- Figure 3 is an outline view of the present invention.
- the injection molding machine injection molding device of the present invention comprises: a stirring screw 1 disposed in the barrel for stirring and pushing the material; a driving screw 2 connected to the rear of the screw 1; 2 is fixed to the stirring screw 1 as described.
- the transmission screw 2 is disposed on the feeding servo motor 3, and the feeding servo motor 3 is an inner rotor servo motor.
- the transmission screw 2 is connected to the base 31 of the feeding servo motor 3 via a bearing 34.
- the transmission bearing 2 is sleeved with a transmission nut 4, and the transmission nut 4 is connected to the inner rotor 33 of the feeding servo motor 3.
- the stator 32 is coupled to the base 31.
- the rear portion of the transmission screw 2 has an extension 6 which is bored on the injection-out servo motor 5.
- the extension 6 is connected to the base of the injection servo motor 5 via a tapered roller bearing 54.
- the extension 6 is keyed to the rotor 53 of the injection servo motor 5.
- This type of key connection can take the extension 6 as a corner bar (as is common with hexagonal bars:) and the rotor 53 is connected to the corner bar; it can also take the form of a spline.
- Injection servo motor 5 uses a hollow outer rotor servo motor.
- the stator 52 is coupled to the base 51.
- the invention uses two hollow rotor servo motors to realize the complete action of feeding and injection.
- the injection servo motor rotates to the right (from the motor shaft end), the feeding servo motor does not rotate, acts as a brake, because the two motors are completely fixed, the drive screw is forced to retreat, and the stirring screw is driven. Retracting, achieving the loosening action, the retracting speed is only related to the speed of the servo motor.
- the servo motor is rotated to the right (from the motor shaft end), the servo motor is left-handed, the drive screw is retracted, the servo motor is driven to drive the angle bar to the left, and the drive screw is rotated to the left.
- the drive screw drives the stirring screw to rotate left and backward to realize the feeding and stirring action.
- the retraction speed of the agitating screw is the sum of the rotational speeds of the two hollow rotor servo motors.
- the servo motor is left-handed (seen from the motor shaft end), the feeding servo motor does not move, acts as a brake, and the transmission screw is forced to move forward, causing the stirring screw to move forward and make an injection action.
- Speed regulation principle Coaxial reversal one when the required feeding time is very short, the injection motor 3 is right-handed (from the motor shaft end), driving the transmission nut 4 to the right rotation, so that the transmission screw 2 is retracted, and the feeding motor 5 is left-handed.
- the present embodiment differs from the first embodiment in that the injection servo motor 5 is an inner rotor motor, and the extension 6 is connected to the inner rotor 53 of the injection servo motor.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
说 明 书
注塑机加料射出装置 技术领域
本发明涉及注塑机的加料射出机构。 背景技术
图 1所示是现有注塑机的加料射出装置。 加料伺服电机 3右旋 (从电机尾端看） ， 通过主动轮二 传动到从动轮二 Γ , 驱动螺杆 Γ左旋 （从电机轴端看） ， 实现加料搅料动作； 与加料动作同时， 射出伺服电机 1 Γ左旋 （从电机尾端看） ， 驱动主动轮一 1(Τ左旋， 主动轮一 1(Τ带动从动轮一 9、右旋 （从电机轴端看） ， 从动轮一 9、直 接驱动传动螺杆 5右旋， 因为传动螺母 6 皮固定座 13固定不能移动， 所以传动螺杆 5、在右旋同时被迫后退， 实现松退动作。同时， 从动轮 一 9、通过花键 Τ以及压盖 8、固定在传动螺杆 5、上， 所以当传动螺杆 5、后退时， 从动轮一 9、以及从动轮一 9、固定的传动结构、射出伺服电 机 1 Γ同时后退。
射出伺服电机 1 Γ右旋 （从电机尾端看） ， 通过主动轮一 1(Τ、从 动轮一 9、带动传动螺杆 5、左旋， 传动螺杆 5、旋转通过轴承 12、将旋转 动作化为平动， 推动螺杆 Γ前进， 完成射出动作。同时螺杆 Γ拖动从 动轮二 2、以及主动轮二 、加料伺服电机 3、前进； 传动螺杆 5、带着从 动轮一 9\主动轮一 1(Τ和射出伺服电机 1 Γ前进。 以上为整个加料射 出动作的整个周期动作。
加料伺服电机与螺杆之间需要一整套皮带轮传动机构， 同样射 出伺服电机与传动螺杆之间也需要一套皮带轮传动机构， 螺杆与传
动螺杆之间还设置推力轴承实现转动变平动。其机构的复杂是显然的， 由此带来成本升高； 其次由于采用皮带轮传动， 传动精确度低； 再 有， 电机和传动机构都需要跟随螺杆移动， 事实上它们都需要被设 置在一个移动平台上， 平台连同电机和传动机构的惯性很大， 在启 动和制动时难以精确控制其轴向位置， 控制精度不高。 发明内容
本发明要解决现有注塑机的加料射出装置的机构复杂、移动部件 多、移动惯性大、控制精度低的缺点， 提供一种结构简单、移动部件少、 移动惯性小、 控制精度高、 成本低的注塑机加料射出装置。
本发明所述的注塑机加料射出装置， 包括：
一设置在料筒内用于搅拌和推料的搅拌螺杆；
一连接在所述的螺杆后部的传动螺杆；
其特征在于：
所述的传动螺杆与所述的搅拌螺杆固接；
所述的传动螺杆穿设在加料伺服电机上， 所述的加料伺服电机 是内转子伺服电机， 所述的传动螺杆通过轴承连接在加料伺服电机 的基座上， 所述的传动螺杆上套有传动螺母， 所述的传动螺母连接 加料伺服电机的内转子；
所述的传动轴承的后部有延伸段， 所述的延伸段穿设在射出伺 服电机上， 所述的延伸段通过轴承连接在射出伺服电机的基座上， 所述的延伸段与所述的射出伺服电机的转子之间键连接。
进一步， 所述的射出伺服电机是外转子电机， 所述的延伸段连 接所述的射出伺服电机的外转子。
进一步， 所述的射出伺服电机是内转子电机， 所述的延伸段连
接所述的射出伺服电机的内转子。
更进一步， 所述的延伸段与所述的射出伺服电机的转子之间键 连接形式是： 所述的延伸段是角棒， 所述的射出伺服电机的转子与 所述的角棒连接。
本发明用两台中空转子伺服电机联动实现加料射出全套动作。射 出伺服电机向右旋转 （从电机轴端看） ，加料伺服电机不转， 充当刹 车， 因两电机完全固定， 强制驱动传动螺杆后退， 带动搅拌螺杆后 退， 实现松退动作， 松退速度只与射出伺服电机的转速有关。射出伺 服电机向右旋转 （从电机轴端看） ， 加料伺服电机左旋， 传动螺杆 后退， 加料伺服电机带动角棒左旋， 带动传动螺杆左旋， 传动螺杆 带动搅拌螺杆左旋后退， 实现加料、搅料动作， 搅拌螺杆的后退速度 跟为两中空转子伺服电机转速之和。射出伺服电机左旋 （从电机轴端 看） ， 加料伺服电机不动， 充当刹车， 传动螺杆被迫平动前进， 带 动搅拌螺杆平动前进， 做射出动作。
本发明采用两伺服电机联动直驱系统， 结构简单紧凑， 高效节 能整个驱动系统的工作效率可高达 90%以上。同时在工作过程中移动 部件只有搅拌螺杆和传动螺杆， 电机完全不动， 大大减小了移动惯 性， 有利于精确控制轴向位置。再有， 通过两电机转向的组合， 在加 料动作以及加料速度上有很大的调节空间， 可以极大地缩短加料时 间 （0.25S以内） ， 实现快速射出、 快速加料等全部加料射出动作， 也可以将整个加料时间调节为最短周期时间的几十倍甚至上百倍， 最大极限地满足各层次客户需求。
本发明的优点是： 结构简单紧凑、成本低， 移动部件少、移动惯 性小、 控制精度高， 加料动作以及加料速度的调节范围大。
附图说明
图 1是现有注塑机的加料射出装置
图 2是本发明的结构原理图
图 3是本发明的外形图 具体实 式
实施例一
参照附图 2、 3：
本发明所述的注塑机加料射出装置， 包括： 一设置在料筒内用 于搅拌和推料的搅拌螺杆 1 ; 一连接在所述的螺杆 1后部的传动螺杆 2； 所述的传动螺杆 2与所述的搅拌螺杆 1固接。
所述的传动螺杆 2穿设在加料伺服电机 3上， 所述的加料伺服 电机 3是内转子伺服电机。 所述的传动螺杆 2通过轴承 34连接在加 料伺服电机 3的基座 31上， 所述的传动轴承 2上套有传动螺母 4， 所述的传动螺母 4连接加料伺服电机 3的内转子 33。 定子 32连接在 基座 31上。
所述的传动螺杆 2的后部有延伸段 6， 所述的延伸段 6穿设在射 出射出伺服电机 5上， 所述的延伸段 6通过圆锥滚子轴承 54连接在 射出伺服电机 5的基座 51上， 所述的延伸段 6与所述的射出伺服电 机 5的转子 53之间键连接。 这种键连接可以采取延伸段 6是角棒 (如 常见的六角棒：)， 而转子 53与角棒连接； 也可以采取花键形式。 射出 伺服电机 5采用中空外转子伺服电机。 定子 52连接基座 51。
本发明用两台中空转子伺服电机联动实现加料射出全套动作。射 出伺服电机向右旋转 （从电机轴端看） ，加料伺服电机不转， 充当刹 车， 因两电机完全固定， 强制驱动传动螺杆后退， 带动搅拌螺杆后
退， 实现松退动作， 松退速度只与射出伺服电机的转速有关。射出伺 服电机向右旋转 （从电机轴端看） ， 加料伺服电机左旋， 传动螺杆 后退， 加料伺服电机带动角棒左旋， 带动传动螺杆左旋， 传动螺杆 带动搅拌螺杆左旋后退， 实现加料、搅料动作， 搅拌螺杆的后退速度 跟为两中空转子伺服电机转速之和。射出伺服电机左旋 （从电机轴端 看） ， 加料伺服电机不动， 充当刹车， 传动螺杆被迫平动前进， 带 动搅拌螺杆平动前进， 做射出动作。
调速原理： 同轴反转一一当要求加料时间很短时， 射出电机 3 右旋 （从电机轴端看） ， 带动传动螺母 4右旋， 使传动螺杆 2后退， 同时加料电机 5左旋， 转动传动螺杆 2， 在传动螺母 4的推动下后退， 因此传动螺杆 2的后退速度为两个电机转速之和， 我们可以通过调 节两个电机的转速来控制搅拌螺杆 1的后退速度以及搅拌螺杆 1的 转速； 如果要求延长加料时间， 我们可以让射出电机 3左旋带动传 动螺母 4左旋， 使传动螺杆 2前进， 与此同时加料电机 5左旋转， 转动传动螺杆 2， 在传动螺母 4的作用下后退， 此时传动螺杆 2的后 退速度为加料电机 5与射出电机 3的转速之差， 注意： 加料电机 3 的转速必须高于射出电机 5的转速， 否则会原地搅料。
实施例二
参照附图 2、 3：
本实施例与实施例一不同之处是： 射出伺服电机 5是内转子电 机， 所述的延伸段 6连接所述的射出伺服电机的内转子 53。
其余与实施例一相同。 本说明书实施例所述的内容仅仅是对发明构思的实现形式的列 举， 本发明的保护范围的不应当被视为仅限于实施例所陈述的具体
形式， 本发明的保护范围也及于本领域技术人员根据本发明构思所
Claims
1、 注塑机加料射出装置， 包括：
一设置在料筒内用于搅拌和推料的搅拌螺杆；
一连接在所述的螺杆后部的传动螺杆；
其特征在于：
所述的传动螺杆与所述的搅拌螺杆固接；
所述的传动螺杆穿设在加料伺服电机上， 所述的加料伺服电机是内转子伺 服电机， 所述的传动螺杆通过轴承连接在加料伺服电机的基座上， 所述的传动 轴承上套有传动螺母， 所述的传动螺母连接加料伺服电机的内转子；
所述的传动螺杆的后部有延伸段， 所述的延伸段穿设在射出伺服电机上， 所述的延伸段通过轴承连接在射出伺服电机的基座上， 所述的延伸段与所述的 射出伺服电机的转子之间键连接。
2、 如权利要求 1所述的注塑机加料射出装置， 其特征在于： 所述的射出伺 服电机是外转子电机， 所述的延伸段连接所述的射出伺服电机的外转子。
3、 如权利要求 1所述的注塑机加料射出装置， 其特征在于： 所述的射出伺 服电机是内转子电机， 所述的延伸段连接所述的射出伺服电机的内转子。
4、 如权利要求 2或 3所述的注塑机加料射出装置， 其特征在于： 所述的延 伸段与所述的射出伺服电机的转子之间键连接形式是： 所述的延伸段是角棒， 所述的射出伺服电机的转子与所述的角棒连接。
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| CN200810063684.4 | 2008-06-25 | ||
| CN2008100636844A CN101332660B (zh) | 2008-06-25 | 2008-06-25 | 注塑机加料射出装置 |
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| WO2009155798A1 true WO2009155798A1 (zh) | 2009-12-30 |
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| CN101332660B (zh) * | 2008-06-25 | 2012-06-13 | 联塑(杭州)机械有限公司 | 注塑机加料射出装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1202412A (zh) * | 1997-05-30 | 1998-12-23 | 住友重机械工业株式会社 | 内置电动机式电注入成形设备 |
| CN101332660A (zh) * | 2008-06-25 | 2008-12-31 | 联塑(杭州)机械有限公司 | 注塑机加料射出装置 |
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| DE69401840T2 (de) * | 1993-05-03 | 1997-06-12 | Saia Burgess Electronics Ag | Linearantrieb |
| DE10195427T5 (de) * | 2000-02-07 | 2005-03-03 | Kabushiki Kaisha Meiki Seisakusho | Spritzgussmaschine und Verfahren zum Steuern der Spritzgussmaschine |
| JP3321452B2 (ja) * | 2000-02-15 | 2002-09-03 | 住友重機械工業株式会社 | 電動射出成形機 |
| CN2586577Y (zh) * | 2002-11-04 | 2003-11-19 | 财团法人工业技术研究院 | 电磁式同轴驱动射出装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1202412A (zh) * | 1997-05-30 | 1998-12-23 | 住友重机械工业株式会社 | 内置电动机式电注入成形设备 |
| CN101332660A (zh) * | 2008-06-25 | 2008-12-31 | 联塑(杭州)机械有限公司 | 注塑机加料射出装置 |
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