WO2018218394A1 - Dispositif de moulage par injection électrique hautes performances - Google Patents

Dispositif de moulage par injection électrique hautes performances Download PDF

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Publication number
WO2018218394A1
WO2018218394A1 PCT/CN2017/086247 CN2017086247W WO2018218394A1 WO 2018218394 A1 WO2018218394 A1 WO 2018218394A1 CN 2017086247 W CN2017086247 W CN 2017086247W WO 2018218394 A1 WO2018218394 A1 WO 2018218394A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
injection molding
drive shaft
injection
ball
Prior art date
Application number
PCT/CN2017/086247
Other languages
English (en)
Chinese (zh)
Inventor
陈明华
Original Assignee
苏州锦珂塑胶科技有限公司
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 苏州锦珂塑胶科技有限公司 filed Critical 苏州锦珂塑胶科技有限公司
Priority to PCT/CN2017/086247 priority Critical patent/WO2018218394A1/fr
Priority to CN201710618863.9A priority patent/CN108927966B/zh
Priority to PCT/CN2017/094501 priority patent/WO2018218768A1/fr
Publication of WO2018218394A1 publication Critical patent/WO2018218394A1/fr

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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
    • 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
    • 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
    • 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
    • B29C45/58—Details

Definitions

  • the invention belongs to the field of plastics and relates to an electric injection molding mechanism used in an injection molding machine or the like.
  • the injection molding machine mainly includes motors, reduction transmission systems, screws, screw nut pairs and other components.
  • the screw is an important part of the injection molding machine, used for conveying, compacting, melting, stirring and pressing the plastic.
  • the action is accomplished by the rotation of the screw within the barrel and the movement in the axial direction. When the screw rotates, the plastic will rub against each other on the inner wall of the barrel, the bottom surface of the screw groove, the screw advance surface, and between the plastic and the plastic.
  • the injection time is crucial for the shaping of the plastic, and it is necessary to ensure that the injection system has sufficient response speed (ie screw acceleration) to ensure that the melt can be injected into the cavity of the mold in a short time.
  • the amount of components that need to be moved during the injection process is large and complicated (for example, including a screw, a servo motor, a pre-plasticized transmission system, a bearing set, an injection nut, and an injection slide seat).
  • Newton's second law when the injection pressure is constant, if the total mass of the injection motion system is large, the acceleration obtained by the screw will decrease, that is, the injection response speed is greatly reduced, and the required speed cannot be achieved in a very short time.
  • the injection speed has a great influence on the working conditions required for high-speed injection.
  • the linear guide of the moving parts in the conventional injection system is realized by sliding friction, and the contact surface wears quickly, the heat is high, the lubrication requirement is high, the lubrication phenomenon occurs when the lubrication is insufficient, and the power consumed by the drive motor is also increased. .
  • the present invention provides an electric injection molding system and an injection molding machine including the same, which requires less moving parts than conventional conventional injection molding machines when performing an injection operation.
  • the inertia is greatly reduced, and the effect speed and injection accuracy of the injection system are greatly improved.
  • an injection molding system for an injection molding machine comprising:
  • the screw drive shaft includes a ball spline and a ball nut, the screw is mounted on the screw drive shaft;
  • the ball screw being mounted in cooperation with the ball nut of the screw drive shaft, the ball screw moving the screw drive shaft and the screw back and forth in an axial direction;
  • An axial guiding mechanism is mounted with the ball spline of the screw drive shaft.
  • the screw and the screw drive shaft are axially moved back and forth, and the ball screw and the axial guiding mechanism do not move axially back and forth.
  • the screw drive shaft is provided in one piece.
  • the injection molding system further includes an elastic energy storage device and a retaining ring, wherein the retaining ring is fitted to one end of the screw drive shaft of the screw, so that the movement state of the retaining ring and the screw Similarly, one end of the elastic energy storage device is mounted on the retaining ring, and the other end is fixed.
  • the elastic energy storage mechanism and the screw drive shaft are coaxially disposed.
  • the inner cavity of the axial guiding mechanism and the ball spline of the screw drive shaft are mounted by ball cooperation, so that the axial guiding mechanism guides the screw drive shaft to move axially forward and backward, and also A limit of the circumferential direction of the screw drive shaft is provided.
  • an injection molding machine comprising the injection molding system and the mold clamping system according to the first aspect of the invention.
  • the screw drive shaft comprises a ball spline and a ball nut, and is integrated, and realizes the dual functions of the ball spline and the ball nut, and provides a guiding effect while greatly reducing the guide.
  • the coefficient of friction during the operation of the injection molding system increases the injection acceleration.
  • the injection screw of the injection molding system of the invention is directly assembled with the screw drive shaft, and no additional installation process is required, so that the injection screw and the screw drive shaft can maintain synchronous movement, and the screw drive shaft is also designed for integral processing, and the injection molding system The stability is greatly improved.
  • the injection molding system and the injection molding machine provided by the invention are provided with an elastic energy storage device, and are connected with the tail of the injection screw, can perform back pressure compensation during the pre-plasticization process, and compress energy storage, and release elastic energy storage during the injection process.
  • the device can directly and accurately apply the thrust to the screw to effectively increase the injection pressure and speed; and the elastic energy storage mechanism and the screw drive shaft are coaxially arranged to improve the stability of the injection molding system.
  • the back pressure pressure compensation can be performed in the pre-plasticizing process, and the compression energy storage can effectively reduce the rated power of the injection driving motor and reduce the cost of the injection system.
  • Figure 1 is a schematic illustration of the principle of a first embodiment of an injection molding system provided by the present invention.
  • FIG. 2 is a top plan view showing the structure of a first embodiment of the injection molding system provided by the present invention.
  • FIG. 3 is a top plan view of the drive/drive process of the first embodiment of the injection molding system provided by the present invention.
  • Screw drive shaft The screw drive shaft of the present invention is integrally arranged, which refers to the ball spline and the ball nut as a whole, that is, the outer surface of the same hollow shaft is processed into a spline, and the inner cavity is processed into a ball screw.
  • the mother as the screw drive shaft, is axially guided by the ball nut of the inner ring and the ball screw (the screw drive shaft and the ball screw are not integrally processed) while the shaft and the drive are connected, This ensures that the direction of the driving force of the ball screw always coincides with the axis of the entire injection portion (including the screw + screw drive shaft + ball screw).
  • Axial guiding mechanism It is matched with the ball spline part of the screw drive shaft, which is axially constrained, and provides axial and forward movement guidance.
  • the object of the present invention is to provide a high-performance injection molding system and an injection molding machine equipped with the injection molding system, which can reduce the load of the injection molding system during operation, improve the response speed and accuracy of the injection molding system, and reduce the driving power of the injection molding system and improve the efficiency. cut costs.
  • the injection molding system provided by the invention comprises:
  • Screw 1 barrel 2, fixed frame 3, retaining ring 4, spring 5, pre-plastic motor 6, first pre-plastic gear 7, second pre-plastic gear 8, first bearing set 9, screw drive shaft 10, shaft
  • forward of the moving member means moving toward the nozzle 17
  • reverse means moving in a direction away from the nozzle 17.
  • the "rear end” and “rear side” are ends that extend away from the direction of the screw.
  • the "moving back and forth in the axial direction” and “the axial movement in the front and rear direction” mean moving back and forth with respect to the fixed frame.
  • a preferred pre-molding drive mechanism comprises a pre-plastic motor 6, a first pre-plastic gear 7 and a second pre-plastic gear 8, it being noted that one skilled in the art may take other
  • An alternative drive to accomplish the function of the pre-drive drive mechanism includes, but is not limited to, a hollow shaft motor drive or the like well known to those skilled in the art.
  • a preferred driving mechanism during the injection process includes an injection motor 13, a first injection gear 14, and a second injection gear 15. It should be noted that those skilled in the art may adopt other alternative drives.
  • the manner in which the function of the injection drive mechanism is accomplished includes, but is not limited to, the use of motor direct drive, and the like, which is well known to those skilled in the art.
  • the injection molding system includes a screw drive shaft and an axial guiding mechanism that are fitted and mounted, and is axially constrained while providing axial forward and backward movement guidance.
  • the person can use other alternative structures to achieve the function of transmitting the rotation of the drive mechanism to the screw and moving the screw axially.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • Fig. 1 is a schematic view showing the principle of an injection molding system of a first embodiment of the present invention.
  • Fig. 2 is a plan view showing the injection molding system of the first embodiment in a cross section.
  • the barrel is 2 and the fixed frame is 3, and the fixed frame 3 is used to support the injection molding system.
  • the barrel 2 is fixedly coupled to the front end of the fixed frame 3 by bolts, and a nozzle 17 is provided at the front end of the barrel 2, and a mold clamping system (not shown) may be disposed in front of the nozzle 17.
  • the screw 1 functions as a push-out member, and the main body of the screw 1 is fitted with the inner cavity of the cylinder 2, and the screw 1 can be moved forward and backward or along the axis of the cylinder 2.
  • the trailing end of the screw 1 is fixed to the front end of the screw drive shaft 10 to ensure that the movement state of the screw 1 is the same as that of the screw drive shaft 10.
  • the screw drive shaft 10 is an integral arrangement, including a ball spline and a ball nut, that is, the ball spline and the ball nut are processed as a whole, that is, the outer surface of the same hollow shaft is processed into a spline, and the inner cavity is processed into a ball nut. , to play the role of the shaft.
  • the screw drive shaft 10 is fitted by the ball nut of the inner ring and the ball screw 12 while the shaft and the drive are being driven.
  • the ball spline of the screw drive shaft 10 is hollow near one end of the ball screw 12, and the inner cavity of the hollow portion is processed into a ball nut.
  • the inner cavity of the ball nut is fitted with one end of the ball screw 12, and the ball screw 12 is mounted.
  • the other end is mounted on the rear end of the fixed frame 3 through the second bearing set 16, thereby axially fixing the ball screw 12, and the ball screw 12 is rotatable about the axis.
  • the inner cavity of the axial guiding mechanism 11 and the ball spline of the screw drive shaft 10 are mounted by ball cooperation, so that the axial guiding mechanism 11 guides the screw driving shaft 10 in front and rear axial movement, and also performs the circumferential direction limit. .
  • the outer ring of the axial guiding mechanism 11 is mounted to the middle of the fixed frame 3 by the first bearing set 9, so that the axial direction of the axial guiding mechanism 11 is fixed in position, but it can be rotated along the axis.
  • the second injection gear 15 is coupled to the trailing end of the ball screw 12, and the rotation of the second injection gear 15 drives the ball screw 12 to rotate, and drives the ball nut of the screw drive shaft 10 to move axially, thereby driving the screw 1 to move back and forth.
  • the retaining ring 4 is mounted at the rear end of the screw 1 (i.e., the moving state of the retaining ring 4 is the same as that of the screw 1), and one end of the spring 5 is fixed to the end surface of the retaining ring 4, and the other end is fixed to the end surface of the second pre-plastic gear 8.
  • the pre-molded motor 6 is fixed on the fixed frame 3
  • the first pre-plastic gear 7 is mounted on the shaft of the pre-plastic motor 6, and the second pre-molded gear 8 is fixedly coupled to the end surface of the axial guiding mechanism 11, the first pre-plastic gear 7 and the second pre-plastic gear 8 are directly meshed or driven by a belt (or a chain or the like).
  • the injection motor 13 is fixed to the fixed frame 3, and the first injection gear 14 is mounted on the shaft of the injection motor 13, and is directly meshed with the second injection gear 15 or driven by a belt (or a chain or the like).
  • the pre-molding motor 6 and the injection motor 13 cause the screw 1 to complete rotation or axial back and forth movement.
  • the pre-molding motor 6 is powered, transmitted to the second pre-plastic gear 8 through the first pre-plastic gear 7, and the second pre-molding gear 8 drives the axial guiding mechanism 11 to rotate, thereby driving the shaft 10 through the axial guiding mechanism 11 and the screw.
  • the ball spline cooperates to drive the screw drive shaft 10 to rotate about the axis, and the drive screw 1 rotates to perform a pre-plastic action.
  • the screw 1 rotates in the cylinder 2 while receding linearly with respect to the cylinder 2 in the direction of the axis B, and the injection motor 15 rotates, causing the ball screw 12 to rotate and the screw drive shaft 10 to retreat.
  • the retaining ring 4 follows the screw 1 linearly backwards, and the compression spring 5 provides back pressure compensation for the pre-plastic phase; the other back pressure is generated by the slip of the injection motor 13 and the pre-molding motor 6, preferably through a pressure sensor or the like.
  • the device is used in conjunction with closed-loop control to adjust the back pressure.
  • the pre-molding phase is completed, the pre-molding motor 6 is locked, the injection motor 13 is powered, the ball screw 12 is driven to rotate by the first injection gear 14 and the second injection gear 15, and the ball nut and the ball of the shaft 10 are driven by the screw.
  • the screw drive shaft 10 is driven to retreat linearly, and the screw 1 is retracted to complete the retraction of the screw 1.
  • the pre-molding motor 6 is locked and does not rotate, and the injection motor 13 supplies power, and the ball screw 12 is driven to rotate by the first injection gear 14 and the second injection gear 15, and then the ball nut of the screw drive shaft 10 is engaged with the ball screw 12.
  • the screw drive shaft 10 and the screw 1 are directly pushed forward along the axis B with respect to the barrel 2, and the injection action of the screw 1 is completed.
  • the spring 5 is extended, and the released spring force provides partial pressure for the injection action.
  • the invention also provides an injection molding machine which adopts the above-mentioned injection molding device of the invention, has a small load during the injection molding process, and the acceleration is greatly improved, which helps to improve the process quality of the injection molded product.
  • the screw drive shaft is integrated, and the double function of the ball spline and the ball nut is realized at the same time, which provides the guiding effect and greatly reduces the friction coefficient during the operation of the injection molding system and improves the injection acceleration.
  • the elastic energy storage device can perform back pressure compensation during the pre-plasticization process, and compresses the energy storage, effectively reducing the rated power of the injection drive motor and reducing the cost of the injection system.
  • the qualifiers similar to "first" and “second” appearing in this document do not refer to the limitation of chronological order, quantity, or importance, but merely to be a technique in the technical solution. Features are distinguished from another technical feature. Similarly, the qualifiers similar to “one” appearing herein are not intended to limit the quantity, but rather to describe the technical features that have not appeared in the foregoing. Similarly, modifiers similar to "about” and “approximately” appearing before a numeral in this document usually include the number and its specific The meaning should be understood in conjunction with the context. Similarly, unless a noun is modified by a particular quantity, it should be considered as including the singular and the plural. In the technical solution, the singular number of the technical features may be included, and the plural may also be included. Technical characteristics.
  • the injection molding system and the injection molding machine provided by the present invention achieve the following technical effects and have industrial applicability:
  • the integrated design of the screw drive shaft realizes the dual function of the ball spline and the ball nut, which provides the guiding effect and greatly reduces the friction coefficient during the operation of the injection molding system and improves the injection acceleration.
  • the elastic energy storage device can perform back pressure compensation during the pre-plasticization process, and compresses the energy storage, effectively reducing the rated power of the injection drive motor and reducing the cost of the injection system.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un mécanisme de moulage par injection électrique hautes performances et une machine de moulage par injection. Le mécanisme de moulage par injection électrique hautes performances comprend une tige (1) de vis, un arbre (10) d'entraînement de tige de vis, une vis mère à billes (12) et un mécanisme de guidage axial (11). L'arbre (10) d'entraînement de tige de vis comprend une cannelure à billes et un écrou sphérique. Dans le système de moulage par injection et la machine de moulage par injection, lorsqu'une action d'injection est effectuée, le nombre de composants devant effectuer un mouvement est petit ; seule la tige (1) de vis, l'arbre (10) d'entraînement de tige de vis et d'autres mécanismes doivent effectuer un mouvement et d'autres composants d'entraînement et de transmission ne produisent pas de mouvement axial avec des actions d'injection, la masse du système est légère pendant les actions d'injection, l'inertie de mouvement est fortement réduite, par conséquent, la vitesse de réponse et la précision des actions d'injection sont considérablement améliorées et la puissance d'entraînement est également fortement réduite.
PCT/CN2017/086247 2017-05-27 2017-05-27 Dispositif de moulage par injection électrique hautes performances WO2018218394A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2017/086247 WO2018218394A1 (fr) 2017-05-27 2017-05-27 Dispositif de moulage par injection électrique hautes performances
CN201710618863.9A CN108927966B (zh) 2017-05-27 2017-07-26 高性能注塑成型机
PCT/CN2017/094501 WO2018218768A1 (fr) 2017-05-27 2017-07-26 Machine de moulage par injection à hautes performances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/086247 WO2018218394A1 (fr) 2017-05-27 2017-05-27 Dispositif de moulage par injection électrique hautes performances

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Publication Number Publication Date
WO2018218394A1 true WO2018218394A1 (fr) 2018-12-06

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PCT/CN2017/086247 WO2018218394A1 (fr) 2017-05-27 2017-05-27 Dispositif de moulage par injection électrique hautes performances
PCT/CN2017/094501 WO2018218768A1 (fr) 2017-05-27 2017-07-26 Machine de moulage par injection à hautes performances

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WO (2) WO2018218394A1 (fr)

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JP2022131751A (ja) * 2021-02-26 2022-09-07 住友重機械工業株式会社 射出成形機

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JP3581918B2 (ja) * 1998-08-21 2004-10-27 東洋機械金属株式会社 射出成形機のノズルタツチ機構
CN1586863A (zh) * 2004-08-03 2005-03-02 浙江大学 一种注塑机的注射传动装置
CN101197208A (zh) * 2007-10-17 2008-06-11 五邑大学 粘结永磁体电动注射成形方法及其装置
CN104290288A (zh) * 2013-07-17 2015-01-21 宁波弘讯科技股份有限公司 一种注塑系统以及一种注塑机

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CN104512013A (zh) * 2013-09-26 2015-04-15 苏州立注机械有限公司 注塑机的一体化注塑装置
CN103615459A (zh) * 2013-12-03 2014-03-05 山东高强紧固件有限公司 发动机用花键连杆螺母
AT515479B1 (de) * 2014-02-28 2015-12-15 Engel Austria Gmbh Einspritzaggregat für eine Formgebungsmaschine
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CN108943624A (zh) * 2017-05-27 2018-12-07 苏州锦珂塑胶科技有限公司 一种高性能电动注塑装置
CN206796465U (zh) * 2017-05-27 2017-12-26 苏州锦珂塑胶科技有限公司 一种高性能电动注塑装置

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Publication number Priority date Publication date Assignee Title
JP3581918B2 (ja) * 1998-08-21 2004-10-27 東洋機械金属株式会社 射出成形機のノズルタツチ機構
CN1586863A (zh) * 2004-08-03 2005-03-02 浙江大学 一种注塑机的注射传动装置
CN101197208A (zh) * 2007-10-17 2008-06-11 五邑大学 粘结永磁体电动注射成形方法及其装置
CN104290288A (zh) * 2013-07-17 2015-01-21 宁波弘讯科技股份有限公司 一种注塑系统以及一种注塑机

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CN108927966A (zh) 2018-12-04
CN108927966B (zh) 2021-01-08
WO2018218768A1 (fr) 2018-12-06

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