WO2024079876A1 - 射出装置および射出成形機 - Google Patents

射出装置および射出成形機 Download PDF

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Publication number
WO2024079876A1
WO2024079876A1 PCT/JP2022/038351 JP2022038351W WO2024079876A1 WO 2024079876 A1 WO2024079876 A1 WO 2024079876A1 JP 2022038351 W JP2022038351 W JP 2022038351W WO 2024079876 A1 WO2024079876 A1 WO 2024079876A1
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WO
WIPO (PCT)
Prior art keywords
injection device
cylinder
injection
plate
base member
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/038351
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English (en)
French (fr)
Japanese (ja)
Inventor
仙賀正俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to PCT/JP2022/038351 priority Critical patent/WO2024079876A1/ja
Priority to JP2024551020A priority patent/JPWO2024079876A1/ja
Publication of WO2024079876A1 publication Critical patent/WO2024079876A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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

  • This disclosure relates to an injection device and an injection molding machine.
  • the injection device disclosed in JP 09-155924 A can be rotated relative to the machine base.
  • the first aspect of the present disclosure is an injection device that can rotate relative to a support surface by a pivot pin, and includes a pusher plate that moves an injection member inserted into a cylinder in the axial direction of the cylinder to inject molten resin from within the cylinder, a rear plate that receives a reaction force generated by the movement of the pusher plate, a base member that supports the rear plate in a displaceable manner, and a roller that supports the base member and runs on the support surface in response to the rotation of the injection device.
  • the second aspect of the present disclosure is an injection molding machine equipped with the injection device according to the first aspect.
  • FIG. 1 is a side view of an injection molding machine according to one embodiment.
  • FIG. 2 is a view taken along the line II in FIG.
  • FIG. 3 is a schematic diagram showing the injection device rotated from the state shown in FIG.
  • the injection device comprises a pusher plate, a rear plate, and rollers.
  • the pusher plate moves to inject resin into the mold.
  • the rear plate receives a reaction force generated by the movement of the pusher plate.
  • the rollers run on the support surface in response to the rotation of the injection device, thereby assisting the rotation of the injection device relative to the support surface.
  • the reaction force received by the rear plate is transmitted to the rollers, there is a problem that the rollers may be damaged or deformed.
  • FIG. 1 is a side view of an injection molding machine 10 according to this embodiment.
  • FIG. 1 shows a vertical direction D1 (upward +D1, downward -D1) and an arrangement direction D2 (forward +D2, rearward -D2).
  • the arrangement direction D2 is the direction in which a clamping unit 14 and an injection unit 12, which will be described later, are arranged.
  • the arrangement direction D2 is, for example, a direction parallel to a horizontal plane.
  • the injection molding machine 10 includes an injection device 12, a clamping device 14, a slide device 16, and a machine base 18.
  • the clamping device 14 is a device that applies a clamping force to the mold 20.
  • the clamping device 14 is disposed on a machine base 18.
  • the clamping device 14 can open and close the mold 20. Note that the mold 20 in a closed state is shown in FIG. 1.
  • the mold 20 forms a cavity 20c in the closed state. A detailed explanation of the clamping device 14 and the mold 20 will be omitted.
  • the slide device 16 is a device that slides the injection device 12 in the arrangement direction D2.
  • the slide device 16 includes a linear guide 22 and a slider 24.
  • the linear guide 22 is installed on the machine base 18.
  • the linear guide 22 supports the slider 24 so that it can slide in the alignment direction D2.
  • the slider 24 has a support surface 24s.
  • the support surface 24s is a surface that supports the injection device 12. When the slider 24 slides in the arrangement direction D2, the injection device 12 also slides in the arrangement direction D2. When the injection device 12 slides in the arrangement direction D2, the mold 20 is connected to and disconnected from the nozzle 54 described later.
  • the support surface 24s includes an area for the rollers 52 described later to run (see also FIG. 3).
  • a pivot pin 26 is attached to the slider 24.
  • the pivot pin 26 protrudes upward from the support surface 24s in a direction +D1.
  • the axis LP of the pivot pin 26 extends in the vertical direction D1.
  • the pivot pin 26 fits into a recess 28 formed in the injection device 12. This allows the injection device 12 to rotate relative to the support surface 24s around the pivot pin 26 (see also Figures 2 and 3).
  • the slider 24 also has an insertion hole 30 in the vertical direction D1 that opens into the support surface 24s. A more detailed description of the insertion hole 30 will be given later.
  • the injection device 12 is a device that injects molten resin into the cavity 20c.
  • the injection device 12 includes a cylinder 32, an injection member 34, a front plate 36, a plurality of tie bars 38, a rear plate 40, a pusher plate 42, a ball screw 44, a nut 46, a base member 48, a slide member 50, and rollers 52.
  • the number of rollers 52 is two (see also FIG. 2), but is not limited to this.
  • FIG. 2 is a view taken along the line II in FIG. 1. Note that the machine base 18, the front end of the cylinder 32, the front end 34f of the injection member 34, and the front and rear ends of the linear guide 22 are omitted from FIG. 2.
  • FIG. 3 is a schematic diagram showing the injection device 12 rotated from the state shown in FIG. 2. The vertical direction D1 and the arrangement direction D2 shown in FIG. 2 and FIG. 3 correspond to FIG. 1.
  • the injection device 12 is rotatable. In light of this, in this embodiment, unless otherwise specified, the injection device 12 will be described based on the state shown in Figure 2.
  • the cylinder 32 is a cylindrical member.
  • a hopper (not shown), a heater (not shown), and a nozzle 54 (Fig. 1) are attached to the cylinder 32. Resin is supplied into the cylinder 32 via the hopper (not shown).
  • the heater (not shown) is, for example, a band heater wrapped around the cylinder 32. The heater (not shown) heats and melts the resin supplied into the cylinder 32.
  • the nozzle 54 is attached to the front end of the cylinder 32. The nozzle 54 is capable of contacting the mold 20.
  • the axial direction is the direction in which the axis LC of the cylinder 32 extends, unless otherwise specified.
  • the axial direction is parallel to the arrangement direction D2 in FIG. 2.
  • the axial direction changes in response to the rotation of the injection device 12.
  • the axis LC of the cylinder 32 in this embodiment is perpendicular to the axis LP of the pivot pin 26, but is not limited to this.
  • the injection member 34 is a longitudinal member that is inserted into the cylinder 32.
  • the injection member 34 is, for example, a screw or a plunger. In this embodiment, the case where the injection member 34 is a screw will be described. More precisely, a portion of the injection member 34, including the front end 34f ( Figure 1), is inserted into the cylinder 32.
  • the axis of the injection member 34 inserted into the cylinder 32 coincides with the axis LC of the cylinder 32. Therefore, the axis LC of the cylinder 32 is also the axis of the injection member 34.
  • the front plate 36 is a support plate that supports the cylinder 32.
  • the front plate 36 is located rearward of the cylinder 32.
  • the injection member 34 penetrates the front plate 36 in the axial direction of the cylinder 32. Therefore, the rear end 34r of the injection member 34 is located rearward of the front plate 36.
  • the recess 28 described above is formed in the lower part of the front plate 36. Therefore, in this embodiment, the front plate 36 of the injection device 12 is installed on the axis LP of the pivot pin 26. Furthermore, the front plate 36 rotates about the pivot pin 26, causing the entire injection device 12 to rotate. Since the injection device 12 is rotatable, it becomes easier to perform inspection work on the injection device 12, for example.
  • the front plate 36 is formed with an insertion hole 58 into which the rotation stop bolt 56 can be inserted.
  • the lower part of the front plate 36 is formed wider than the upper part of the front plate 36, and the insertion hole 58 is formed in the lower part.
  • the insertion hole 58 is formed in a position different from the injection member 34, the recess 28, etc. in the direction perpendicular to the axis LP of the pivot pin 26.
  • the insertion hole 58 and the insertion hole 30 of the slider 24 described above communicate in the vertical direction D1.
  • the operator can insert and remove the rotation stop bolt 56 into the communicated insertion hole 30 and insertion hole 58.
  • the rotation stop bolt 56 by being inserted through the insertion hole 30 and the insertion hole 58, prevents the injection device 12 from rotating. In other words, the rotation stop bolt 56 can limit the rotation range of the injection device 12. This allows the operator to easily maintain the state in which the axis LC is parallel to the arrangement direction D2. By being able to maintain the state in which the axis LC is parallel to the arrangement direction D2, the nozzle 54 and the mold 20 can easily come into contact.
  • the multiple tie bars 38 connect the front plate 36 and the rear plate 40. Each of the multiple tie bars 38 extends parallel to the axial direction of the cylinder 32.
  • the rear plate 40 is a support plate located rearward of the front plate 36.
  • the rear plate 40 rotatably supports the ball screw 44.
  • the rear plate 40 also supports the ball screw 44 so that it can move relatively in the axial direction of the cylinder 32.
  • the center of rotation of the ball screw 44 is the axis of the ball screw 44.
  • the axis of the ball screw 44 coincides with the axis LC of the cylinder 32. Therefore, the axis LC is also the axis of the ball screw 44.
  • the pusher plate 42 is a support plate located between the front plate 36 and the rear plate 40.
  • the above-mentioned multiple tie bars 38 penetrate the pusher plate 42 in the axial direction of the cylinder 32.
  • a spline bush 60 and a screw sleeve 62 are installed in front of the pusher plate 42.
  • the spline bushing 60 fits into the injection member 34.
  • the screw sleeve 62 supports the spline bushing 60 so that it cannot move relative to the cylinder 32 in the axial direction. This causes the injection member 34 to be supported by the pusher plate 42. In addition, the injection member 34 cannot move relative to the pusher plate 42 in the axial direction.
  • the screw sleeve 62 also supports the spline bushing 60 so that it can rotate about the axis LC of the cylinder 32. This allows the injection member 34 to also rotate about the axis LC.
  • the injection member 34 can knead the resin inside the cylinder 32 by rotating about the axis LC.
  • the rotation of the injection member 34 can be controlled by connecting a motor to the injection member 34 and controlling the motor.
  • the center of rotation of the injection member 34 is the axis LC.
  • the nut 46 is installed at the rear of the pusher plate 42 so that it cannot rotate. However, the pusher plate 42 supports the nut 46 so that it cannot move relative to the cylinder 32 in the axial direction.
  • the ball screw 44 described above is screwed into the nut 46. This allows the nut 46 to move in the axial direction in response to the rotation of the ball screw 44.
  • the pusher plate 42 As the nut 46 moves in the axial direction, the pusher plate 42 also moves in the axial direction of the cylinder 32. As the pusher plate 42 moves in the axial direction, the ejection member 34 supported by the pusher plate 42 also moves in the axial direction.
  • the rotation of the ball screw 44 can be controlled by connecting a motor to the ball screw 44 and controlling the motor. Therefore, the movement of the ejection member 34 in the axial direction can be controlled using the motor that rotates the ball screw 44.
  • the pusher plate 42 (injection member 34) moves forward +D2, causing the molten resin in the cylinder 32 to be injected into the cavity 20c via the nozzle 54.
  • the injection molding machine 10 can produce a product by solidifying the molten resin filled in the cavity 20c.
  • the movement of the pusher plate 42 generates the reaction force described above. This reaction force is transmitted to the rear plate 40, for example, via the ball screw 44.
  • the base member 48 is located below the rear plate 40.
  • the base member 48 supports the rear plate 40 so that it can be displaced. In other words, the base member 48 bears the load of the rear plate 40 without being connected or joined to the rear plate 40.
  • the rear plate 40 is displaceable relative to the base member 48, the reaction force generated by the movement of the pusher plate 42 is prevented from being transmitted to the base member 48 via the rear plate 40.
  • the rear plate 40 is connected to the front plate 36 via a plurality of tie bars 38. This prevents the rear plate 40 from tipping over on the base member 48. The rear plate 40 is also prevented from falling off the base member 48.
  • the base member 48 may extend to the front plate 36 and be fixed to the front plate 36.
  • the base member 48 is stabilized by being supported by the front plate 36 and two rollers 52, which will be described later.
  • the base member 48 may support not only the rear plate 40 but also the pusher plate 42 in a displaceable manner.
  • a linear guide 64 is installed on a portion of the upper surface of the base member 48 that is located between the front plate 36 and the rear plate 40.
  • the linear guide 64 supports the pusher plate 42 so that it can slide in the axial direction of the cylinder 32.
  • the pusher plate 42 can move in the axial direction in response to the rotation of the ball screw 44 while being stable by being supported by the base member 48.
  • the slide member 50 is disposed between the rear plate 40 and the base member 48.
  • the slide member 50 supports the rear plate 40 so that it can be displaced relative to the base member 48.
  • the slide member 50 is made of a material that is more slippery than the rear plate 40, and is attached to the rear plate 40.
  • the slide member 50 is not connected or joined to the base member 48. This further suppresses the reaction force generated by the movement of the pusher plate 42 from being transmitted from the rear plate 40 to the base member 48, compared to when the slide member 50 is not present.
  • the two rollers 52 support the base member 48 and run on the support surface 24s in response to the rotation of the injection device 12.
  • the two rollers 52 are connected, for example, to the rear end 48r of the base member 48.
  • the two rollers 52 assist the rotation of the injection device 12 by running on the support surface 24s. This allows the operator to easily rotate the injection device 12. Note that, as mentioned above, the number of rollers 52 is not limited to two.
  • the roller 52 may be damaged or deformed due to the transmitted reaction force.
  • the reaction force generated by the movement of the pusher plate 42 is prevented from being transmitted to the base member 48 via the rear plate 40 because the rear plate 40 is displaceable relative to the base member 48. Therefore, the reaction force is also prevented from being transmitted to the roller 52 connected to the base member 48. As a result, the risk of the roller 52 being damaged, deformed, etc. is reduced.
  • the rotation stop bolt 56 when the rotation stop bolt 56 is inserted into the insertion hole 58 and tightened, it generates an axial force in the vertical direction D1.
  • This axial force like the reaction force described above, may cause the rollers 52 to deform or break.
  • the two rollers 52 are connected to the rear end 48r of the base member 48.
  • the two rollers 52 are disposed as far away as possible from the front plate 36 in which the insertion hole 58 is formed. This makes it possible to suppress the effect of the axial force generated by the rotation stop bolt 56 on the rollers 52. As a result, the risk of the rollers 52 being deformed or broken by the axial force generated by the rotation stop bolt 56 is reduced.
  • the pivot pin 26 is attached to the support surface 24s, but this is not limiting.
  • the pivot pin 26 may be attached to the front plate 36.
  • the pivot pin 26 protrudes in the downward direction ⁇ D1 from below the front plate 36.
  • a hole (not shown) into which the pivot pin 26 can be fitted is formed in the support surface 24s.
  • the slide member 50 is made of a material that is more slippery with respect to the base member 48 than the rear plate 40 and is attached to the rear plate 40, but the present invention is not limited to this.
  • the slide member 50 may be made of a material that is more slippery than the base member 48 and attached to the base member 48. In this case, the slide member 50 is not connected or joined to the rear plate 40. Even in this case, the reaction force generated by the movement of the pusher plate 42 is further suppressed from being transmitted from the rear plate 40 to the base member 48, compared to the case where the slide member 50 is not present.
  • the slide member 50 may be omitted.
  • the base member 48 may directly support the rear plate 40 so as to be displaceable.
  • a linear block (not shown) that supports the rear plate 40 and a guide rail (not shown) that movably supports the linear block may be provided in the injection device 12 instead of the slide member 50.
  • the movement direction of the linear block that supports the rear plate 40 is the axial direction of the cylinder 32.
  • the injection member 34 is a screw, but this is not limiting.
  • the injection member 34 may be a plunger (not shown).
  • the pusher plate 42 does not need to rotatably support the injection member 34.
  • the pusher plate 42 moves in the axial direction of the cylinder 32 in response to the rotation of the ball screw 44, but the present invention is not limited to this.
  • the movement of the pusher plate 42 along the axial direction of the cylinder 32 may be realized by an actuator (not shown), such as a hydraulic cylinder or a pneumatic cylinder.
  • the rear plate supports the hydraulic cylinder, the pneumatic cylinder, or the like.
  • stress generated by the movement of the pusher plate is transmitted to the rear plate via the hydraulic cylinder, the pneumatic cylinder, or the like.
  • the base member 48 supports the rear plate 40 in a displaceable manner, thereby reducing the risk of the roller 52 being damaged, deformed, or the like.
  • the injection device (12) which can rotate relative to a support surface (24s) by a pivot pin (26), includes a pusher plate (42) that moves an injection member (34) inserted into a cylinder (32) in the axial direction of the cylinder to inject molten resin in the cylinder, a rear plate (40) that receives a reaction force generated by the movement of the pusher plate, a base member (48) that supports the rear plate so that it can be displaced, and a roller (52) that supports the base member and runs on the support surface in response to the rotation of the injection device.
  • the injection device described in Appendix 1 may further include a front plate (36) supporting the cylinder, and the base member may be fixed to the front plate.
  • the front plate may be installed on an axis line (LP) of the pivot pin, and the injection device may be rotated by the front plate rotating about its axis.
  • LP axis line
  • the front plate may be formed with a recess (28) that fits with the pivot pin attached to the support surface.
  • the pivot pin may be attached to the front plate so as to be engageable with a hole formed in the support surface.
  • an insertion hole (58) into which a rotation stop bolt (56) for limiting a rotation range of the injection device is inserted may be formed in a position of the injection device different from that of the pivot pin in a direction perpendicular to the axis (LP) of the pivot pin.
  • the injection device may further include a slide member (50) disposed between the rear plate and the base member, and supporting the rear plate displaceably relative to the base member.
  • the injection molding machine (10) includes an injection device according to any one of claims 1 to 7.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
PCT/JP2022/038351 2022-10-14 2022-10-14 射出装置および射出成形機 Ceased WO2024079876A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2022/038351 WO2024079876A1 (ja) 2022-10-14 2022-10-14 射出装置および射出成形機
JP2024551020A JPWO2024079876A1 (https=) 2022-10-14 2022-10-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/038351 WO2024079876A1 (ja) 2022-10-14 2022-10-14 射出装置および射出成形機

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WO2024079876A1 true WO2024079876A1 (ja) 2024-04-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6377723A (ja) * 1986-09-19 1988-04-07 Fanuc Ltd 射出成形機における射出ユニツト旋回機構
JPH03114318U (https=) * 1990-03-12 1991-11-25
JPH0939032A (ja) * 1995-08-03 1997-02-10 Fanuc Ltd 射出成形機の射出ユニット旋回機構
JPH10329164A (ja) * 1997-06-03 1998-12-15 Niigata Eng Co Ltd 横型射出成形機における射出ユニットの移動装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6377723A (ja) * 1986-09-19 1988-04-07 Fanuc Ltd 射出成形機における射出ユニツト旋回機構
JPH03114318U (https=) * 1990-03-12 1991-11-25
JPH0939032A (ja) * 1995-08-03 1997-02-10 Fanuc Ltd 射出成形機の射出ユニット旋回機構
JPH10329164A (ja) * 1997-06-03 1998-12-15 Niigata Eng Co Ltd 横型射出成形機における射出ユニットの移動装置

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