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
  • B29C45/1777—Nozzle touch mechanism
• • 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
  • B29C45/1777—Nozzle touch mechanism
  • B29C2045/1779—Nozzle touch mechanism using chains or the like as drive transmission means for the movement of the injection unit

Definitions

• the present invention relates to a nozzle touch mechanism for moving an injection unit and bringing the nozzle into contact with a mold in an injection molding machine.
• Nozzle touch mechanism in a conventional injection molding machine uses a hydraulic cylinder to move the injection unit by hydraulic pressure and to maintain a constant pressure by the hydraulic pressure. The nozzle was pressed into the mold.
• the motor is used without using hydraulic pressure, and the rotational force of the motor moves the injection unit in the axial direction via the pole screw to reduce the noise.
• Nozzle-tatch mechanisms have been developed to abut and press against the mold.
• the present invention relates to an extruder base provided on a base of an injection molding machine at a sliding position, and an extruder base provided with the same.
• the injection unit is fixed to the motor, and the first base, which is driven by a motor, is fixed to the rotating base on the external base.
• the second sprocket is also rotationally fixed to the extruder base, and one end of the chain is fixed to the die side of the base of the injection molding machine. After attaching the chain to the first sprocket, it is combined with the second sprocket, and then the base of the injection molding machine.
• the chain fixed to the anti-mold side is fixed to a traction device for eliminating slack of the chain, and the chain is combined with the first sprocket.
• a tensioning device that pulls laterally in the running direction of the chain is fixed to the base of the injection molding machine between one end fixed to the mold side of the base of the injection molding machine and the base of the injection molding machine. I do it.
• the nozzle touch is performed by the motor by the tension device including the sprocket, the chain, and the spring.
• the tension device including the sprocket, the chain, and the spring.
• FIG. 1 is a partial schematic side view showing a main part of an injection molding machine having a nozzle touch mechanism according to one embodiment of the present invention
• FIG. 2 is a diagram in which the injection unit of the peripheral embodiment is removed.
• Figure 3 is a plan view of the extruder base
• FIG. 3 is a partial cross-sectional side view of the extruder base
• FIG. 4 is a plan view of the sprocket of this embodiment. It is a figure explaining composition and operation of a chain.
• FIG. 1 shows a nozzle touch mechanism according to an embodiment of the present invention. --A part of the equipped injection molding machine is shown, 1 is an injection unit, 2 is a mature cylinder, 3 is a nozzle, and 4 is a mold clamping device (not shown) of the injection molding machine.
• the mounted mold 5 is an extruder base to which the above-mentioned injection unit 1 is fixed, and can be slid left and right in the middle of the base 6 of the injection molding machine. It is placed as shown.
• S1 to S7 are sprockets, and the sprockets S1 to S7 are chained with chains C1 to C3 as described later.
• M is a motor with brake.
• FIG. 2 shows the extruder base 5 when the injection unit 1 is removed from the extruder base 5, and the extruder is shown in FIG.
• the base 5 is mounted on the rails L 1 and L 2 on the base 6 so that it can slide to the left and right in FIG.
• the upper surface of the base 5 is flattened as shown in the sectional view of the part 1 ′ of the extractor base 5 shown in FIG. 3 and the injection unit.
• the toe can be placed on it.
• Sprockets S 1 to S 5 are provided on the lower surface of the extruder base 5.
• a motor M with brake is fixed to one end of the upper surface of the extruder base 5, and a sprocket is attached to the motor shaft of the motor M.
• a large sprocket S 1 is fixedly mounted, and is fixed between the sprocket S 1 and the extruder base 5 in a rotating manner.
• a first chain C 1 is mounted between the packets S 2. As shown in FIG. 2, the first chain C1 has a sprocket for adjusting the tension of the first chain C1, which will be described in detail later.
• the umbrella S5 is combined.
• a sprocket S3 smaller than the sprocket S2 is fixed to the shaft of the sprocket S2, and the sprockets S2, S 3 is designed to rotate integrally.
• a second chain is provided between the sprocket S4 rotatably fixed to the extruder space 5 and the sprocket S3.
• FIG. 2 and FIG. 3 reference numeral 8 denotes a door for connecting the extract base 5 and the ejection unit 1 and moving the injection unit 1. A hole into which a live pin (not shown) fits.
• the sprocket S5 is slidable into a groove 11 provided in the extractor base 5 so that it can be fixed to the sprocket. Adjust the tension of the first chain by changing the position of the packet S5.
• FIG. 4 is a diagram showing the relationship between the above-mentioned sprockets S1 to S6 and another sprocket S7.
• the sprocket S1 S5 is fixed to the extract base 5, but the sprocket S6 and the sprocket S7 are fixed to the base 6 by rotation.
• the above --A third chain C3 is bridged over the socket S7, and one end C3-1 of the third chain C3 is connected to the second chain C3.
• the other end C 3 -2 of the pin C 2 is fixed to the tensioning device 13, and the other end C 3 -2 is fixed to the tensioning device 13.
• the tensioning device 13 pulls the third chain C 3 by the spring 14, and therefore, the third chain C 3 is pulled.
• a second tie, fixed at tip C3-1 will be pulled laterally as shown by the solid line in FIG.
• 15 is a fixing tool for fixing the second chain C2 to the base 6, and S is a limit switch.
• the second chain C2 between the sprocket S3 and the towing device 9 becomes slack, but this slack is caused by the spring of the towing device 9. It is absorbed by the shrinking of the ring 10.
• the second chain C 2 between the other end C 2 of the second chain C 2 and the fixture S 15 on the side S 2 —2 is connected to FIG.
• the state changes from the bent state shown by the solid line to the linear state shown by the broken line in F ⁇ G.4.
• the third chain C 3 moves while pulling the spring 14 of the tension device 13, and the second chain C 2 is shown by a broken line in FIG.
• the limit switch LS When this happens, the limit switch LS is turned on, thereby activating the brake of the motor M and stopping the drive of the motor M. Let me do it.
• the amount of extension of the spring 14 of the tension device ⁇ 3 that is, when the second chain C2 is moved from the solid line position to the broken line position in FIG.
• the force generated by the extension of the spring 14 of the nozzle 3 serves as a pressing force of the nozzle 3 against the mold 4.
• a spring having a panel coefficient such that a spring force of 300 kg is generated depending on the amount of extension of the spring may be used for the spring 14.
• the sprocket S7 and the third chain C3 are provided, and the second chain C2 is pulled by the tension device 13.
• the second chain C 2 is directly pulled by the tension device 13 without providing the sprocket S 7 and the third chain C 3. You may do it.
• the motor M with brake is used in the above embodiment, the motor with brake is not used, but the normal motor is used.
• the switch LS When the switch LS is turned on, the rotation of the sprockets S3 and S2, that is, these sprockets S
• a locking device for stopping rotation of the shaft of S4 may be provided in the shaft sprocket and the cutouts S3 and S4.
• the limit switch S is designed to detect when the second chain C2 is in the broken state of FIG. 4, but the tension device is used. It is also possible to detect the amount of elongation of 13 spring 14 No. That is, when the nozzle 3 generates an appropriate force (for example, 300 kg) to press against the Jinli 4, the limit switch LS is connected to the spring 14 when the elongation is sufficient.
• 4 (FIG. 4), which detects the movement of the member 16 (FIG. 4) that moves by the expansion and contraction of the member, may be turned on.
• the second chain C 2 does not necessarily need to be extended as shown by the broken line in FIG. 4, but may be extended by the tension device to generate an appropriate amount of force. Only. For this reason, the pressure of the nozzle against the mold can be fluctuated and adjusted depending on the set position of the limit switch.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=16868967

Family Applications (1)

Country Status (2)

Cited By (4)

Families Citing this family (2)

Citations (1)

• 1984
  • 1984-10-31 JP JP22796184A patent/JPS61106216A/ja active Granted
• 1985
  • 1985-10-29 WO PCT/JP1985/000599 patent/WO1986002591A1/ja unknown

Patent Citations (1)

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