WO2021068479A1 - Machine de moulage par injection haute performance synergétique de puissance de plastification et puissance d'injection - Google Patents

Machine de moulage par injection haute performance synergétique de puissance de plastification et puissance d'injection Download PDF

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Publication number
WO2021068479A1
WO2021068479A1 PCT/CN2020/086021 CN2020086021W WO2021068479A1 WO 2021068479 A1 WO2021068479 A1 WO 2021068479A1 CN 2020086021 W CN2020086021 W CN 2020086021W WO 2021068479 A1 WO2021068479 A1 WO 2021068479A1
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WO
WIPO (PCT)
Prior art keywords
injection
casing
nut
plasticizing
power
Prior art date
Application number
PCT/CN2020/086021
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English (en)
Chinese (zh)
Inventor
陈明华
Original Assignee
苏州锦珂塑胶科技有限公司
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Publication of WO2021068479A1 publication Critical patent/WO2021068479A1/fr

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    • 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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
    • 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
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76003—Measured parameter
    • B29C2945/76006—Pressure
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76177—Location of measurement
    • B29C2945/7618—Injection unit
    • B29C2945/7619—Injection unit barrel
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76344—Phase or stage of measurement
    • B29C2945/76381—Injection

Definitions

  • the invention belongs to the field of injection molding machine preparation, and specifically relates to a high-efficiency injection molding machine with a synergy of plasticizing power and injection power.
  • Injection molding machine also known as injection molding machine or injection machine. It is the main molding equipment for making thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molding dies.
  • the injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it shoot out and fill the mold cavity.
  • the process of plastic injection molding mainly includes a plasticizing process, a loosening process and an injection process.
  • the screw is mainly retreated and rotates around its axis to push the melt to the discharge end of the barrel;
  • the loosening process mainly retreats to release the pressure to ensure that the melt does not leak from the nozzle;
  • the injection process mainly pushes the screw forward to extrude the melt from the nozzle.
  • the screw retreats while rotating during the process; the screw retreats linearly (not rotating) during the loosening process; the screw moves straight forward (not rotating) during the injection process.
  • the current injection molding machine equipment in the industry has a low utilization rate of the motor during the injection process and the plasticization process, and the power for plasticization and the power for injection work relatively independently.
  • the plasticizing motor is basically in a high-load or even full-load working state.
  • the injection motor only provides a small back pressure and is basically in a no-load working state; when injecting, the injection motor is in a full-load working state, while the plasticizing motor It is basically in a no-load working state. Therefore, in order to realize the above-mentioned plastic injection molding, the selected plasticizing motor and injection motor require higher rated power, so the cost of the injection molding machine is also relatively high.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an improved plasticizing power and injection power synergistic high-efficiency injection molding machine.
  • a plasticizing power and injection power synergistic high-performance injection molding machine which includes:
  • a barrel which includes a barrel with a cavity inside and communicating with the casing from one end, and a nozzle at the other end of the barrel, wherein the barrel is provided with a plastic material inlet;
  • Screw which extends along the length of the barrel
  • the power system is used to drive the screw to rotate around its own axis and move linearly along its length
  • the power system includes a sleeve whose center line coincides with the shaft axis of the screw and is arranged in the casing through a rotating connection member, a plasticizing drive member that drives the sleeve to rotate around its own axis, and a plasticizing drive member that passes through the sleeve.
  • the transmission component is a double-headed screw with opposite threads.
  • One threaded section of the double-ended screw is matched with the inner thread pair of the sleeve, and the other threaded section Cooperate with the inner thread pair of the nut, and the end of the other thread section emerges from the outer end of the nut.
  • the double-ended screw is driven to move linearly or/and retreat to the outer end of the nut ⁇ Type rotation.
  • the double-ended screw includes a first threaded section matched with the sleeve and a second threaded section matched with the nut, wherein the first threaded section and the second threaded section are fixedly connected from one end, the first threaded section and the second threaded section
  • the axis of the segment is collinear and coincides with the axis of the screw. That is, the first threaded section and the second threaded section are located on the same component.
  • the pitch of the first threaded section is greater than the pitch of the second threaded section, and the pitch of the first threaded section is N times the pitch of the second threaded section, where N ⁇ 2 and is an integer.
  • This setting is suitable for different types of injection molding machines, under different pitches, in order to achieve different rotation speeds of the nut and sleeve to adjust the movement state of the double-headed screw.
  • a connecting flange connected to the plasticized driving member is further provided on the outer periphery of the sleeve, and the power system further includes two ends connected between the connecting flange and the connecting part and the sleeve
  • the elastic member arranged on the outer periphery of the double-headed screw, wherein when the connecting member rotates and retreats to the inside of the casing or recedes linearly to the inside of the casing, the elastic member is in a state of compression and deformation; when the connecting member moves to the outside of the casing, the elastic member is in Restore the deformed state.
  • the elastic member is a spring, and both ends are fixed on the flange connecting the cap and the sleeve, wherein the spring is compressible or/and twistable.
  • the connecting component is a fixed flange, and the inner end of the double-ended screw is fixedly connected with the end of the screw away from the injection end.
  • the casing lining is detachably provided inside the casing, and the sleeve and the nut are respectively rotatably arranged on the casing lining through a rotating connection piece, wherein the rotation connection piece is Bearing.
  • the pressure sensor is arranged between the end of the casing lining away from the barrel and the end of the casing close to the injection driver.
  • the end of the casing away from the barrel forms a stepped cavity
  • the casing lining is stuffed into the stepped cavity
  • the casing lining forms a matching first and second inner cavity, wherein the first The diameter of the inner cavity is larger than the diameter of the second inner cavity
  • the bearings are respectively arranged in the first inner cavity and the second inner cavity
  • the sleeve and the nut are rotatably arranged relative to the inner lining of the casing.
  • the plasticizing drive member includes a plasticizing gear arranged concentrically with the sleeve, a plasticizing transmission member for driving the plasticizing gear to rotate, and a plasticizing motor.
  • the injection driving member includes an injection gear sleeved on the outer end of the nut and arranged concentrically with the nut, an injection transmission member for driving the rotation of the injection gear, and an injection motor.
  • a cooling jacket is provided at the end of the casing and the outer circumference of the barrel, and the cooling jacket is provided with a feeding hole communicating with the plastic material inlet.
  • the present invention has the following advantages compared with the prior art:
  • the invention uses the joint coordination of the sleeve and the nut with different rotation speeds and rotations to drive the double-headed screw to drive the screw to move synchronously. Therefore, the rated power of the motor of the injection unit is significantly lower than that of the existing injection molding machine, and at the same time , Compact structure, small inertia of moving parts, fast response, can effectively expand the injection molding process window, improve product stability and yield.
  • Figure 1 is a schematic cross-sectional view of the structure of the injection molding machine of the present invention (in the process of plasticizing or loosening);
  • Figure 2 is a schematic cross-sectional view of the structure of the injection molding machine of the present invention (in the injection process);
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of” means at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit.
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal connection of two components or the interaction relationship between two components, unless otherwise specified The limit.
  • the first feature “on” or “under” the second feature may be in direct contact with the first and second features, or the first and second features may be indirectly through an intermediary. contact.
  • the "above”, “above” and “above” of the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or it simply means that the level of the first feature is higher than the second feature.
  • the “below”, “below” and “below” of the second feature of the first feature may be that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • the plasticizing power and injection power synergistic high-performance injection molding machine of this embodiment includes a casing 1, a barrel 2, a screw 3, a power system 4, and a pressure sensor 5.
  • the barrel 2 includes a barrel 20 with a cavity 200 inside and communicating with the casing 1 from one end, and a nozzle 21 at the other end of the barrel 20, wherein the barrel 20 is provided with a plastic material inlet 20a.
  • the screw 3 extends along the length of the barrel 2 and is matched with the cavity 200 of the barrel 20.
  • the power system 4 is used to drive the screw 3 to rotate around its own axis and move linearly along its length.
  • the power system 4 includes a sleeve 40 whose center line coincides with the axis of the screw 3 and is arranged in the casing 1 through a rotating connector z, and a plasticizing drive member 41 that drives the sleeve 40 to rotate around its own axis.
  • the transmission part 42 passing through the sleeve 40, the connecting part 43 for connecting the transmission part 42 and the screw 3 away from the extruding end, is arranged in the casing 1 by rotating the connecting piece z, and one end is free from A nut 44 that emerges from the end of the casing 1 away from the barrel 2 and an injection driver 45 that is arranged at the outer end of the nut 44 and drives the nut to rotate around its own axis.
  • the transmission component 42 is a double-headed screw with opposite threads.
  • the double-headed screw includes a first threaded section 421 matched with the inner thread pair of the sleeve 40, and a second threaded section 422 matched with the inner thread pair of the nut 44, wherein the first The threaded section 421 and the second threaded section 422 are fixedly connected from one end, and the axis lines of the first threaded section 421 and the second threaded section 422 are collinear and coincide with the axis of the screw 3.
  • the first threaded section 421 and the second threaded section 422 are provided on the same component.
  • the pitch of the first threaded section 421 is 4 times the pitch of the second threaded section 422. In this way, under different pitches, different rotation speeds of the nut 44 and the sleeve 40 are used to adjust the movement state of the double-headed screw.
  • a connecting flange 46 connected to the plasticizing drive member 41 is also provided on the outer periphery of the sleeve 40.
  • the power system also includes two ends connected between the connecting flange 46 and the connecting part 43 and sleeved on the outer periphery of the double-ended screw.
  • the elastic member 47 wherein when the connecting member 43 rotates and retreats to the inside of the casing 1, or recedes linearly to the inside of the casing 1, the elastic member 47 is in a compressed and deformed state; when the connecting member 43 moves to the outside of the casing 1, the elastic member 47 47 is in a state of restoring deformation.
  • the elastic member 47 is a spring, and both ends are fixed on the connecting member 43 and the connecting flange 46, wherein the spring can be compressed or/and twisted.
  • the connecting member 43 is a fixed flange, and fixedly connects the inner end of the double-ended screw with the end of the screw 3 away from the injection.
  • the casing lining 6 is detachably arranged inside the casing 1, and the sleeve 40 and the nut 44 are respectively rotatably arranged on the casing lining 6 via a rotating connection piece z, wherein the rotation connection piece z is a bearing.
  • the end of the casing 1 away from the barrel 2 forms a stepped cavity
  • the casing lining 6 is stuffed into the stepped cavity
  • the casing lining 6 forms a matching first inner cavity q 1 and a second inner cavity q2.
  • the diameter of the first inner cavity q1 is greater than the diameter of the second inner cavity q2
  • the bearings are respectively arranged in the first inner cavity q1 and the second inner cavity q2
  • the sleeve 40 and the nut 44 rotate relative to the casing lining 6 Set up.
  • the plasticizing drive member 41 includes a plasticizing gear 410 arranged concentrically with the sleeve 40, a plasticizing transmission member for driving the plasticizing gear 410 (not shown in the figure, but it is not difficult to think of) and a plasticizing motor (not shown in the figure) , But it's not hard to think of).
  • the plasticized gear 410 and the sleeve 40 are rigidly connected by a connecting flange 46 (fixed connection)
  • the injection driving member 45 includes an injection gear 450 sleeved on the outer end of the nut 44 and arranged concentrically with the nut 44, an injection transmission member for driving the injection gear 450 (not shown in the figure, but it is not difficult to think of) and an injection motor ( Figure Not shown in, but it is not difficult to think of).
  • the pressure sensor 5 is arranged between the end of the casing lining 6 away from the barrel 2 and the end of the casing 1 close to the injection driver 45. Among them, the pressure sensor 5 can control the movement state of the plasticizing motor and the injection motor according to the set value.
  • the end of the casing 1 and the outer periphery of the barrel 2 are also provided with a cooling jacket 7 that can cool the melt just injected into the barrel 2, wherein the cooling jacket 7 is provided with a plastic material inlet 20a connected to it. Through the feed hole 7a.
  • the melt is injected into the barrel 2 from the feeding hole 7a and the plastic raw material inlet 20a, and the plasticizing motor drives the plasticizing gear 410 to rotate, thereby driving the sleeve 40 to rotate, and the injection motor driving the injection gear 450 to rotate at the same time , So as to drive the nut 44 to rotate.
  • the sleeve 40 and the nut 44 rotate in opposite directions and the rotation speed is different, the force formed by the double-ended screw in the axial direction is zero, and the force in the radial direction drives the double-ended screw.
  • the outer end retreats to the outside of the nut 44, that is, at this time, the double-ended screw produces a rotational movement under the cooperative action of the sleeve 40 and the nut 44, and at the same time retreats (moves to the right) along the axial direction of the screw 3, such a Then, the molten material moves to the front end of the barrel 2 under the reverse push of the screw 3, and the spring 46 is compressed and deformed to store pressure, and at the same time, the torsion deformation is restored to provide a part of the plasticizing torque.
  • the plasticizing motor drives the plasticizing gear 410 to rotate, thereby driving the sleeve 40 to rotate; at the same time, the injection motor drives the injection gear 450 to rotate, thereby driving the nut 44 to rotate, and the sleeve 40 and the nut 44 rotate in opposite directions.
  • the force of the double-headed screw in the radial direction is zero.
  • the force formed in the axial direction drives the double-headed screw to move backward along the linear direction, that is, the double-headed screw is in the sleeve at this time.
  • the barrel 40 and the nut 44 do not rotate under the cooperative action, but retreat in the axial direction (moving to the right in the figure), which in turn drives the screw 3 to recede linearly to achieve relaxation, and at the same time, the spring 46 is further compressed.
  • the reverse rotation of the injection gear 450 by the injection motor drives the nut 44 to reverse rotation
  • the plasticization motor drives the plasticization gear 410 to reverse rotation, thereby driving the sleeve
  • the barrel 40 reacts.
  • the rotation of the sleeve 40 and the nut 44 are opposite and the rotation speed is different, the radial force of the double-headed screw is zero, and the force formed in the axial direction is all to the left.
  • the sleeve 40 and the nut 44 do not rotate under the cooperative action, but move to the left along the axial direction, thereby ejecting the melt from the nozzle.
  • the spring 46 recovers from deformation to provide a part of the injection pressure.
  • the present invention drives the linear or rotational movement of the double-head screw to drive the screw to move synchronously through the joint coordination of the sleeve and the nut with different rotation speeds and rotations. Therefore, the rated power of the motor of the injection unit is significantly lower than that of the existing injection molding machine. At the same time, the compact structure, small inertia of moving parts and fast response can effectively expand the injection molding process window and improve product stability and yield.

Abstract

L'invention concerne une machine de moulage par injection haute performance synergique de puissance de plastification et puissance d'injection, comprenant un boîtier, un cylindre, une vis, un capteur de pression et un système d'alimentation. Le système d'alimentation comprend un manchon, un élément d'entraînement de plastification, un élément de transmission, un élément de raccordement, un écrou et un élément d'entraînement d'injection ; l'élément de transmission est une vis à double tête qui a des filetages qui tournent dans des directions opposées, une section filetée de la vis à double tête correspond à une paire de filetage interne du manchon, l'autre section filetée de celle-ci correspond à une paire de filetage interne de l'écrou, et la partie d'extrémité de l'autre section filetée émerge de la partie d'extrémité externe de l'écrou. Au moyen de la synergie conjointe des différentes vitesses de rotation et des directions de rotation du manchon et de l'écrou, la présente invention peut entraîner la vis à double tête pour se déplacer de manière linéaire ou rotative pour entraîner la vis à se déplacer de manière synchrone. Par conséquent, la puissance nominale d'un moteur dans une unité d'injection est considérablement réduite par rapport à une machine de moulage par injection existante. En même temps, la présente invention a une structure compacte, et des parties mobiles de celle-ci ont une faible inertie. La présente invention répond rapidement, peut étendre efficacement la fenêtre de traitement de moulage par injection, et améliorer la stabilité et le rendement du produit.
PCT/CN2020/086021 2019-10-08 2020-04-22 Machine de moulage par injection haute performance synergétique de puissance de plastification et puissance d'injection WO2021068479A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910950921.7 2019-10-08
CN201910950921.7A CN110682510A (zh) 2019-10-08 2019-10-08 塑化动力和注射动力协同式高效能注塑机

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WO2021068479A1 true WO2021068479A1 (fr) 2021-04-15

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WO (1) WO2021068479A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110202761A (zh) * 2019-04-23 2019-09-06 苏州锦珂塑胶科技有限公司 一种塑化动力和注射动力协作的注塑机
CN110682510A (zh) * 2019-10-08 2020-01-14 苏州锦珂塑胶科技有限公司 塑化动力和注射动力协同式高效能注塑机
CN112936818B (zh) * 2021-01-27 2022-11-25 浙江罗富工贸有限公司 一种高精度注塑机微注射装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083036A1 (fr) * 1999-09-07 2001-03-14 Negri Bossi S.P.A. Dispositif d'injection electrique pour presses d'injection de matières plastiques
EP1215029A1 (fr) * 2000-12-13 2002-06-19 Phase Motion Control S.r.l. Un dispositif d'entraínement linéaire et rotatif pour mélanger et presser dans des machines à mouler
CN1832842A (zh) * 2003-08-06 2006-09-13 Otb集团有限公司 注塑成型装置及其使用方法
CN110202761A (zh) * 2019-04-23 2019-09-06 苏州锦珂塑胶科技有限公司 一种塑化动力和注射动力协作的注塑机
CN110682510A (zh) * 2019-10-08 2020-01-14 苏州锦珂塑胶科技有限公司 塑化动力和注射动力协同式高效能注塑机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1083036A1 (fr) * 1999-09-07 2001-03-14 Negri Bossi S.P.A. Dispositif d'injection electrique pour presses d'injection de matières plastiques
EP1215029A1 (fr) * 2000-12-13 2002-06-19 Phase Motion Control S.r.l. Un dispositif d'entraínement linéaire et rotatif pour mélanger et presser dans des machines à mouler
CN1832842A (zh) * 2003-08-06 2006-09-13 Otb集团有限公司 注塑成型装置及其使用方法
CN110202761A (zh) * 2019-04-23 2019-09-06 苏州锦珂塑胶科技有限公司 一种塑化动力和注射动力协作的注塑机
CN110682510A (zh) * 2019-10-08 2020-01-14 苏州锦珂塑胶科技有限公司 塑化动力和注射动力协同式高效能注塑机

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